1 Changes in version 0.2.7.4-rc - 2015-10-21
2 Tor 0.2.7.4-rc is the second release candidate in the 0.2.7 series. It
3 fixes some important memory leaks, and a scary-looking (but mostly
4 harmless in practice) invalid-read bug. It also has a few small
5 bugfixes, notably fixes for compilation and portability on different
6 platforms. If no further significant bounds are found, the next
7 release will the the official stable release.
9 o Major bugfixes (security, correctness):
10 - Fix an error that could cause us to read 4 bytes before the
11 beginning of an openssl string. This bug could be used to cause
12 Tor to crash on systems with unusual malloc implementations, or
13 systems with unusual hardening installed. Fixes bug 17404; bugfix
16 o Major bugfixes (correctness):
17 - Fix a use-after-free bug in validate_intro_point_failure(). Fixes
18 bug 17401; bugfix on 0.2.7.3-rc.
20 o Major bugfixes (memory leaks):
21 - Fix a memory leak in ed25519 batch signature checking. Fixes bug
22 17398; bugfix on 0.2.6.1-alpha.
23 - Fix a memory leak in rend_cache_failure_entry_free(). Fixes bug
24 17402; bugfix on 0.2.7.3-rc.
25 - Fix a memory leak when reading an expired signing key from disk.
26 Fixes bug 17403; bugfix on 0.2.7.2-rc.
28 o Minor features (geoIP):
29 - Update geoip and geoip6 to the October 9 2015 Maxmind GeoLite2
32 o Minor bugfixes (compilation):
33 - Repair compilation with the most recent (unreleased, alpha)
34 vesions of OpenSSL 1.1. Fixes part of ticket 17237.
35 - Fix an integer overflow warning in test_crypto_slow.c. Fixes bug
36 17251; bugfix on 0.2.7.2-alpha.
37 - Fix compilation of sandbox.c with musl-libc. Fixes bug 17347;
38 bugfix on 0.2.5.1-alpha. Patch from 'jamestk'.
40 o Minor bugfixes (portability):
41 - Use libexecinfo on FreeBSD to enable backtrace support. Fixes part
42 of bug 17151; bugfix on 0.2.5.2-alpha. Patch from Marcin Cieślak.
44 o Minor bugfixes (sandbox):
45 - Add the "hidserv-stats" filename to our sandbox filter for the
46 HiddenServiceStatistics option to work properly. Fixes bug 17354;
47 bugfix on tor-0.2.6.2-alpha. Patch from David Goulet.
49 o Minor bugfixes (testing):
50 - Add unit tests for get_interface_address* failure cases. Fixes bug
51 17173; bugfix on 0.2.7.3-rc. Patch by fk/teor.
52 - Fix breakage when running 'make check' with BSD make. Fixes bug
53 17154; bugfix on 0.2.7.3-rc. Patch by Marcin Cieślak.
54 - Make the get_ifaddrs_* unit tests more tolerant of different
55 network configurations. (Don't assume every test box has an IPv4
56 address, and don't assume every test box has a non-localhost
57 address.) Fixes bug 17255; bugfix on 0.2.7.3-rc. Patch by "teor".
58 - Skip backtrace tests when backtrace support is not compiled in.
59 Fixes part of bug 17151; bugfix on 0.2.7.1-alpha. Patch from
63 - Fix capitalization of SOCKS in sample torrc. Closes ticket 15609.
64 - Note that HiddenServicePorts can take a unix domain socket. Closes
68 Changes in version 0.2.7.3-rc - 2015-09-25
69 Tor 0.2.7.3-rc is the first release candidate in the 0.2.7 series. It
70 contains numerous usability fixes for Ed25519 keys, safeguards against
71 several misconfiguration problems, significant simplifications to
72 Tor's callgraph, and numerous bugfixes and small features.
74 This is the most tested release of Tor to date. The unit tests cover
75 39.40% of the code, and the integration tests (accessible with "make
76 test-full-online", requiring stem and chutney and a network
77 connection) raise the coverage to 64.49%.
79 o Major features (security, hidden services):
80 - Hidden services, if using the EntryNodes option, are required to
81 use more than one EntryNode, in order to avoid a guard discovery
82 attack. (This would only affect people who had configured hidden
83 services and manually specified the EntryNodes option with a
84 single entry-node. The impact was that it would be easy to
85 remotely identify the guard node used by such a hidden service.
86 See ticket for more information.) Fixes ticket 14917.
88 o Major features (Ed25519 keys, keypinning):
89 - The key-pinning option on directory authorities is now advisory-
90 only by default. In a future version, or when the AuthDirPinKeys
91 option is set, pins are enforced again. Disabling key-pinning
92 seemed like a good idea so that we can survive the fallout of any
93 usability problems associated with Ed25519 keys. Closes
96 o Major features (Ed25519 performance):
97 - Improve the speed of Ed25519 operations and Curve25519 keypair
98 generation when built targeting 32 bit x86 platforms with SSE2
99 available. Implements ticket 16535.
100 - Improve the runtime speed of Ed25519 signature verification by
101 using Ed25519-donna's batch verification support. Implements
104 o Major features (performance testing):
105 - The test-network.sh script now supports performance testing.
106 Requires corresponding chutney performance testing changes. Patch
107 by "teor". Closes ticket 14175.
109 o Major features (relay, Ed25519):
110 - Significant usability improvements for Ed25519 key management. Log
111 messages are better, and the code can recover from far more
112 failure conditions. Thanks to "s7r" for reporting and diagnosing
114 - Add a new OfflineMasterKey option to tell Tor never to try loading
115 or generating a secret Ed25519 identity key. You can use this in
116 combination with tor --keygen to manage offline and/or encrypted
117 Ed25519 keys. Implements ticket 16944.
118 - Add a --newpass option to allow changing or removing the
119 passphrase of an encrypted key with tor --keygen. Implements part
121 - On receiving a HUP signal, check to see whether the Ed25519
122 signing key has changed, and reload it if so. Closes ticket 16790.
124 o Major bugfixes (relay, Ed25519):
125 - Avoid crashing on 'tor --keygen'. Fixes bug 16679; bugfix on
126 0.2.7.2-alpha. Reported by "s7r".
127 - Improve handling of expired signing keys with offline master keys.
128 Fixes bug 16685; bugfix on 0.2.7.2-alpha. Reported by "s7r".
130 o Minor features (client-side privacy):
131 - New KeepAliveIsolateSOCKSAuth option to indefinitely extend circuit
132 lifespan when IsolateSOCKSAuth and streams with SOCKS
133 authentication are attached to the circuit. This allows
134 applications like TorBrowser to manage circuit lifetime on their
135 own. Implements feature 15482.
136 - When logging malformed hostnames from SOCKS5 requests, respect
137 SafeLogging configuration. Fixes bug 16891; bugfix on 0.1.1.16-rc.
139 o Minor features (compilation):
140 - Give a warning as early as possible when trying to build with an
141 unsupported OpenSSL version. Closes ticket 16901.
142 - Fail during configure if we're trying to build against an OpenSSL
143 built without ECC support. Fixes bug 17109, bugfix on 0.2.7.1-alpha
144 which started requiring ECC.
146 o Minor features (geoip):
147 - Update geoip and geoip6 to the September 3 2015 Maxmind GeoLite2
150 o Minor features (hidden services):
151 - Relays need to have the Fast flag to get the HSDir flag. As this
152 is being written, we'll go from 2745 HSDirs down to 2342, a ~14%
153 drop. This change should make some attacks against the hidden
154 service directory system harder. Fixes ticket 15963.
155 - Turn on hidden service statistics collection by setting the torrc
156 option HiddenServiceStatistics to "1" by default. (This keeps
157 track only of the fraction of traffic used by hidden services, and
158 the total number of hidden services in existence.) Closes
160 - Client now uses an introduction point failure cache to know when
161 to fetch or keep a descriptor in their cache. Previously, failures
162 were recorded implicitly, but not explicitly remembered. Closes
165 o Minor features (testing, authorities, documentation):
166 - New TestingDirAuthVote{Exit,Guard,HSDir}IsStrict flags to
167 explicitly manage consensus flags in testing networks. Patch by
168 "robgjansen", modified by "teor". Implements part of ticket 14882.
170 o Minor bugfixes (security, exit policies):
171 - ExitPolicyRejectPrivate now also rejects the relay's published
172 IPv6 address (if any), and any publicly routable IPv4 or IPv6
173 addresses on any local interfaces. ticket 17027. Patch by "teor".
174 Fixes bug 17027; bugfix on 0.2.0.11-alpha.
176 o Minor bug fixes (torrc exit policies):
177 - In torrc, "accept6 *" and "reject6 *" ExitPolicy lines now only
178 produce IPv6 wildcard addresses. Previously they would produce
179 both IPv4 and IPv6 wildcard addresses. Patch by "teor". Fixes part
180 of bug 16069; bugfix on 0.2.4.7-alpha.
181 - When parsing torrc ExitPolicies, we now warn for a number of cases
182 where the user's intent is likely to differ from Tor's actual
183 behavior. These include: using an IPv4 address with an accept6 or
184 reject6 line; using "private" on an accept6 or reject6 line; and
185 including any ExitPolicy lines after accept *:* or reject *:*.
186 Related to ticket 16069.
187 - When parsing torrc ExitPolicies, we now issue an info-level
188 message when expanding an "accept/reject *" line to include both
189 IPv4 and IPv6 wildcard addresses. Related to ticket 16069.
190 - In each instance above, usage advice is provided to avoid the
191 message. Resolves ticket 16069. Patch by "teor". Fixes part of bug
192 16069; bugfix on 0.2.4.7-alpha.
194 o Minor bugfixes (authority):
195 - Don't assign "HSDir" to a router if it isn't Valid and Running.
196 Fixes bug 16524; bugfix on 0.2.7.2-alpha.
197 - Downgrade log messages about Ed25519 key issues if they are in old
198 cached router descriptors. Fixes part of bug 16286; bugfix
200 - When we find an Ed25519 key issue in a cached descriptor, stop
201 saying the descriptor was just "uploaded". Fixes another part of
202 bug 16286; bugfix on 0.2.7.2-alpha.
204 o Minor bugfixes (control port):
205 - Repair a warning and a spurious result when getting the maximum
206 number of file descriptors from the controller. Fixes bug 16697;
207 bugfix on 0.2.7.2-alpha.
209 o Minor bugfixes (correctness):
210 - When calling channel_free_list(), avoid calling smartlist_remove()
211 while inside a FOREACH loop. This partially reverts commit
212 17356fe7fd96af where the correct SMARTLIST_DEL_CURRENT was
213 incorrectly removed. Fixes bug 16924; bugfix on 0.2.4.4-alpha.
215 o Minor bugfixes (documentation):
216 - Advise users on how to configure separate IPv4 and IPv6 exit
217 policies in the manpage and sample torrcs. Related to ticket 16069.
218 - Fix the usage message of tor-resolve(1) so that it no longer lists
219 the removed -F option. Fixes bug 16913; bugfix on 0.2.2.28-beta.
220 - Fix an error in the manual page and comments for
221 TestingDirAuthVoteHSDir[IsStrict], which suggested that a HSDir
222 required "ORPort connectivity". While this is true, it is in no
223 way unique to the HSDir flag. Of all the flags, only HSDirs need a
224 DirPort configured in order for the authorities to assign that
225 particular flag. Patch by "teor". Fixed as part of 14882; bugfix
228 o Minor bugfixes (Ed25519):
229 - Fix a memory leak when reading router descriptors with expired
230 Ed25519 certificates. Fixes bug 16539; bugfix on 0.2.7.2-alpha.
232 o Minor bugfixes (linux seccomp2 sandbox):
233 - Allow bridge authorities to run correctly under the seccomp2
234 sandbox. Fixes bug 16964; bugfix on 0.2.5.1-alpha.
235 - Allow routers with ed25519 keys to run correctly under the
236 seccomp2 sandbox. Fixes bug 16965; bugfix on 0.2.7.2-alpha.
238 o Minor bugfixes (open file limit):
239 - Fix set_max_file_descriptors() to set by default the max open file
240 limit to the current limit when setrlimit() fails. Fixes bug
241 16274; bugfix on tor- 0.2.0.10-alpha. Patch by dgoulet.
243 o Minor bugfixes (portability):
244 - Try harder to normalize the exit status of the Tor process to the
245 standard-provided range. Fixes bug 16975; bugfix on every version
247 - Check correctly for Windows socket errors in the workqueue
248 backend. Fixes bug 16741; bugfix on 0.2.6.3-alpha.
249 - Fix the behavior of crypto_rand_time_range() when told to consider
250 times before 1970. (These times were possible when running in a
251 simulated network environment where time()'s output starts at
252 zero.) Fixes bug 16980; bugfix on 0.2.7.1-alpha.
253 - Restore correct operation of TLS client-cipher detection on
254 OpenSSL 1.1. Fixes bug 14047; bugfix on 0.2.7.2-alpha.
256 o Minor bugfixes (relay):
257 - Ensure that worker threads actually exit when a fatal error or
258 shutdown is indicated. This fix doesn't currently affect the
259 behavior of Tor, because Tor workers never indicates fatal error
260 or shutdown except in the unit tests. Fixes bug 16868; bugfix
262 - Unblock threads before releasing the work queue mutex to ensure
263 predictable scheduling behavior. Fixes bug 16644; bugfix
266 o Code simplification and refactoring:
267 - Change the function that's called when we need to retry all
268 downloads so that it only reschedules the downloads to happen
269 immediately, rather than launching them all at once itself. This
270 further simplifies Tor's callgraph.
271 - Move some format-parsing functions out of crypto.c and
272 crypto_curve25519.c into crypto_format.c and/or util_format.c.
273 - Move the client-only parts of init_keys() into a separate
274 function. Closes ticket 16763.
275 - Simplify the microdesc_free() implementation so that it no longer
276 appears (to code analysis tools) to potentially invoke a huge
277 suite of other microdesc functions.
278 - Simply the control graph further by deferring the inner body of
279 directory_all_unreachable() into a callback. Closes ticket 16762.
280 - Treat the loss of an owning controller as equivalent to a SIGTERM
281 signal. This removes a tiny amount of duplicated code, and
282 simplifies our callgraph. Closes ticket 16788.
283 - When generating an event to send to the controller, we no longer
284 put the event over the network immediately. Instead, we queue
285 these events, and use a Libevent callback to deliver them. This
286 change simplifies Tor's callgraph by reducing the number of
287 functions from which all other Tor functions are reachable. Closes
289 - Wrap Windows-only C files inside '#ifdef _WIN32' so that tools
290 that try to scan or compile every file on Unix won't decide that
292 - Remove the unused "nulterminate" argument from buf_pullup().
295 - Recommend a 40 GB example AccountingMax in torrc.sample rather
296 than a 4 GB max. Closes ticket 16742.
297 - Include the TUNING document in our source tarball. It is referred
298 to in the ChangeLog and an error message. Fixes bug 16929; bugfix
302 - The internal pure-C tor-fw-helper tool is now removed from the Tor
303 distribution, in favor of the pure-Go clone available from
304 https://gitweb.torproject.org/tor-fw-helper.git/ . The libraries
305 used by the C tor-fw-helper are not, in our opinion, very
306 confidence- inspiring in their secure-programming techniques.
308 - Remove the code that would try to aggressively flush controller
309 connections while writing to them. This code was introduced in
310 0.1.2.7-alpha, in order to keep output buffers from exceeding
311 their limits. But there is no longer a maximum output buffer size,
312 and flushing data in this way caused some undesirable recursions
313 in our call graph. Closes ticket 16480.
316 - Make "bridges+hs" the default test network. This tests almost all
317 tor functionality during make test-network, while allowing tests
318 to succeed on non-IPv6 systems. Requires chutney commit 396da92 in
319 test-network-bridges-hs. Closes tickets 16945 (tor) and 16946
320 (chutney). Patches by "teor".
321 - Autodetect CHUTNEY_PATH if the chutney and Tor sources are side-
322 by-side in the same parent directory. Closes ticket 16903. Patch
324 - Use environment variables rather than autoconf substitutions to
325 send variables from the build system to the test scripts. This
326 change should be easier to maintain, and cause 'make distcheck' to
327 work better than before. Fixes bug 17148.
328 - Add a new set of callgraph analysis scripts that use clang to
329 produce a list of which Tor functions are reachable from which
330 other Tor functions. We're planning to use these to help simplify
331 our code structure by identifying illogical dependencies.
332 - Add new 'test-full' and 'test-full-online' targets to run all
333 tests, including integration tests with stem and chutney.
334 - Make the test-workqueue test work on Windows by initializing the
335 network before we begin.
336 - New make target (make test-network-all) to run multiple applicable
337 chutney test cases. Patch from Teor; closes 16953.
338 - Unit test dns_resolve(), dns_clip_ttl() and dns_get_expiry_ttl()
339 functions in dns.c. Implements a portion of ticket 16831.
340 - When building Tor with testing coverage enabled, run Chutney tests
341 (if any) using the 'tor-cov' coverage binary.
342 - When running test-network or test-stem, check for the absence of
343 stem/chutney before doing any build operations.
346 Changes in version 0.2.7.2-alpha - 2015-07-27
347 This, the second alpha in the Tor 0.2.7 series, has a number of new
348 features, including a way to manually pick the number of introduction
349 points for hidden services, and the much stronger Ed25519 signing key
350 algorithm for regular Tor relays (including support for encrypted
351 offline identity keys in the new algorithm).
353 Support for Ed25519 on relays is currently limited to signing router
354 descriptors; later alphas in this series will extend Ed25519 key
355 support to more parts of the Tor protocol.
357 o Major features (Ed25519 identity keys, Proposal 220):
358 - All relays now maintain a stronger identity key, using the Ed25519
359 elliptic curve signature format. This master key is designed so
360 that it can be kept offline. Relays also generate an online
361 signing key, and a set of other Ed25519 keys and certificates.
362 These are all automatically regenerated and rotated as needed.
363 Implements part of ticket 12498.
364 - Directory authorities now vote on Ed25519 identity keys along with
365 RSA1024 keys. Implements part of ticket 12498.
366 - Directory authorities track which Ed25519 identity keys have been
367 used with which RSA1024 identity keys, and do not allow them to
368 vary freely. Implements part of ticket 12498.
369 - Microdescriptors now include Ed25519 identity keys. Implements
370 part of ticket 12498.
371 - Add support for offline encrypted Ed25519 master keys. To use this
372 feature on your tor relay, run "tor --keygen" to make a new master
373 key (or to make a new signing key if you already have a master
374 key). Closes ticket 13642.
376 o Major features (Hidden services):
377 - Add the torrc option HiddenServiceNumIntroductionPoints, to
378 specify a fixed number of introduction points. Its maximum value
379 is 10 and default is 3. Using this option can increase a hidden
380 service's reliability under load, at the cost of making it more
381 visible that the hidden service is facing extra load. Closes
383 - Remove the adaptive algorithm for choosing the number of
384 introduction points, which used to change the number of
385 introduction points (poorly) depending on the number of
386 connections the HS sees. Closes ticket 4862.
388 o Major features (onion key cross-certification):
389 - Relay descriptors now include signatures of their own identity
390 keys, made using the TAP and ntor onion keys. These signatures
391 allow relays to prove ownership of their own onion keys. Because
392 of this change, microdescriptors will no longer need to include
393 RSA identity keys. Implements proposal 228; closes ticket 12499.
395 o Major features (performance):
396 - Improve the runtime speed of Ed25519 operations by using the
397 public-domain Ed25519-donna by Andrew M. ("floodyberry").
398 Implements ticket 16467.
399 - Improve the runtime speed of the ntor handshake by using an
400 optimized curve25519 basepoint scalarmult implementation from the
401 public-domain Ed25519-donna by Andrew M. ("floodyberry"), based on
402 ideas by Adam Langley. Implements ticket 9663.
404 o Major bugfixes (client-side privacy, also in 0.2.6.9):
405 - Properly separate out each SOCKSPort when applying stream
406 isolation. The error occurred because each port's session group
407 was being overwritten by a default value when the listener
408 connection was initialized. Fixes bug 16247; bugfix on
409 0.2.6.3-alpha. Patch by "jojelino".
411 o Major bugfixes (hidden service clients, stability, also in 0.2.6.10):
412 - Stop refusing to store updated hidden service descriptors on a
413 client. This reverts commit 9407040c59218 (which indeed fixed bug
414 14219, but introduced a major hidden service reachability
415 regression detailed in bug 16381). This is a temporary fix since
416 we can live with the minor issue in bug 14219 (it just results in
417 some load on the network) but the regression of 16381 is too much
418 of a setback. First-round fix for bug 16381; bugfix
421 o Major bugfixes (hidden services):
422 - When cannibalizing a circuit for an introduction point, always
423 extend to the chosen exit node (creating a 4 hop circuit).
424 Previously Tor would use the current circuit exit node, which
425 changed the original choice of introduction point, and could cause
426 the hidden service to skip excluded introduction points or
427 reconnect to a skipped introduction point. Fixes bug 16260; bugfix
430 o Major bugfixes (open file limit):
431 - The open file limit wasn't checked before calling
432 tor_accept_socket_nonblocking(), which would make Tor exceed the
433 limit. Now, before opening a new socket, Tor validates the open
434 file limit just before, and if the max has been reached, return an
435 error. Fixes bug 16288; bugfix on 0.1.1.1-alpha.
437 o Major bugfixes (stability, also in 0.2.6.10):
438 - Stop crashing with an assertion failure when parsing certain kinds
439 of malformed or truncated microdescriptors. Fixes bug 16400;
440 bugfix on 0.2.6.1-alpha. Found by "torkeln"; fix based on a patch
441 by "cypherpunks_backup".
442 - Stop random client-side assertion failures that could occur when
443 connecting to a busy hidden service, or connecting to a hidden
444 service while a NEWNYM is in progress. Fixes bug 16013; bugfix
447 o Minor features (directory authorities, security, also in 0.2.6.9):
448 - The HSDir flag given by authorities now requires the Stable flag.
449 For the current network, this results in going from 2887 to 2806
450 HSDirs. Also, it makes it harder for an attacker to launch a sybil
451 attack by raising the effort for a relay to become Stable to
452 require at the very least 7 days, while maintaining the 96 hours
453 uptime requirement for HSDir. Implements ticket 8243.
455 o Minor features (client):
456 - Relax the validation of hostnames in SOCKS5 requests, allowing the
457 character '_' to appear, in order to cope with domains observed in
458 the wild that are serving non-RFC compliant records. Resolves
460 - Relax the validation done to hostnames in SOCKS5 requests, and
461 allow a single trailing '.' to cope with clients that pass FQDNs
462 using that syntax to explicitly indicate that the domain name is
463 fully-qualified. Fixes bug 16674; bugfix on 0.2.6.2-alpha.
464 - Add GroupWritable and WorldWritable options to unix-socket based
465 SocksPort and ControlPort options. These options apply to a single
466 socket, and override {Control,Socks}SocketsGroupWritable. Closes
469 o Minor features (control protocol):
470 - Support network-liveness GETINFO key and NETWORK_LIVENESS event in
471 the control protocol. Resolves ticket 15358.
473 o Minor features (directory authorities):
474 - Directory authorities no longer vote against the "Fast", "Stable",
475 and "HSDir" flags just because they were going to vote against
476 "Running": if the consensus turns out to be that the router was
477 running, then the authority's vote should count. Patch from Peter
478 Retzlaff; closes issue 8712.
480 o Minor features (geoip, also in 0.2.6.10):
481 - Update geoip to the June 3 2015 Maxmind GeoLite2 Country database.
482 - Update geoip6 to the June 3 2015 Maxmind GeoLite2 Country database.
484 o Minor features (hidden services):
485 - Add the new options "HiddenServiceMaxStreams" and
486 "HiddenServiceMaxStreamsCloseCircuit" to allow hidden services to
487 limit the maximum number of simultaneous streams per circuit, and
488 optionally tear down the circuit when the limit is exceeded. Part
491 o Minor features (portability):
492 - Use C99 variadic macros when the compiler is not GCC. This avoids
493 failing compilations on MSVC, and fixes a log-file-based race
494 condition in our old workarounds. Original patch from Gisle Vanem.
496 o Minor bugfixes (compilation, also in 0.2.6.9):
497 - Build with --enable-systemd correctly when libsystemd is
498 installed, but systemd is not. Fixes bug 16164; bugfix on
499 0.2.6.3-alpha. Patch from Peter Palfrader.
501 o Minor bugfixes (controller):
502 - Add the descriptor ID in each HS_DESC control event. It was
503 missing, but specified in control-spec.txt. Fixes bug 15881;
504 bugfix on 0.2.5.2-alpha.
506 o Minor bugfixes (crypto error-handling, also in 0.2.6.10):
507 - Check for failures from crypto_early_init, and refuse to continue.
508 A previous typo meant that we could keep going with an
509 uninitialized crypto library, and would have OpenSSL initialize
510 its own PRNG. Fixes bug 16360; bugfix on 0.2.5.2-alpha, introduced
511 when implementing ticket 4900. Patch by "teor".
513 o Minor bugfixes (hidden services):
514 - Fix a crash when reloading configuration while at least one
515 configured and one ephemeral hidden service exists. Fixes bug
516 16060; bugfix on 0.2.7.1-alpha.
517 - Avoid crashing with a double-free bug when we create an ephemeral
518 hidden service but adding it fails for some reason. Fixes bug
519 16228; bugfix on 0.2.7.1-alpha.
521 o Minor bugfixes (Linux seccomp2 sandbox):
522 - Use the sandbox in tor_open_cloexec whether or not O_CLOEXEC is
523 defined. Patch by "teor". Fixes bug 16515; bugfix on 0.2.3.1-alpha.
525 o Minor bugfixes (Linux seccomp2 sandbox, also in 0.2.6.10):
526 - Allow pipe() and pipe2() syscalls in the seccomp2 sandbox: we need
527 these when eventfd2() support is missing. Fixes bug 16363; bugfix
528 on 0.2.6.3-alpha. Patch from "teor".
530 o Minor bugfixes (Linux seccomp2 sandbox, also in 0.2.6.9):
531 - Fix sandboxing to work when running as a relay, by allowing the
532 renaming of secret_id_key, and allowing the eventfd2 and futex
533 syscalls. Fixes bug 16244; bugfix on 0.2.6.1-alpha. Patch by
535 - Allow systemd connections to work with the Linux seccomp2 sandbox
536 code. Fixes bug 16212; bugfix on 0.2.6.2-alpha. Patch by
539 o Minor bugfixes (relay):
540 - Fix a rarely-encountered memory leak when failing to initialize
541 the thread pool. Fixes bug 16631; bugfix on 0.2.6.3-alpha. Patch
544 o Minor bugfixes (systemd):
545 - Fix an accidental formatting error that broke the systemd
546 configuration file. Fixes bug 16152; bugfix on 0.2.7.1-alpha.
547 - Tor's systemd unit file no longer contains extraneous spaces.
548 These spaces would sometimes confuse tools like deb-systemd-
549 helper. Fixes bug 16162; bugfix on 0.2.5.5-alpha.
551 o Minor bugfixes (tests):
552 - Use the configured Python executable when running test-stem-full.
553 Fixes bug 16470; bugfix on 0.2.7.1-alpha.
555 o Minor bugfixes (tests, also in 0.2.6.9):
556 - Fix a crash in the unit tests when built with MSVC2013. Fixes bug
557 16030; bugfix on 0.2.6.2-alpha. Patch from "NewEraCracker".
559 o Minor bugfixes (threads, comments):
560 - Always initialize return value in compute_desc_id in rendcommon.c
561 Patch by "teor". Fixes part of bug 16115; bugfix on 0.2.7.1-alpha.
562 - Check for NULL values in getinfo_helper_onions(). Patch by "teor".
563 Fixes part of bug 16115; bugfix on 0.2.7.1-alpha.
564 - Remove undefined directive-in-macro in test_util_writepid clang
565 3.7 complains that using a preprocessor directive inside a macro
566 invocation in test_util_writepid in test_util.c is undefined.
567 Patch by "teor". Fixes part of bug 16115; bugfix on 0.2.7.1-alpha.
569 o Code simplification and refactoring:
570 - Define WINVER and _WIN32_WINNT centrally, in orconfig.h, in order
571 to ensure they remain consistent and visible everywhere.
572 - Remove some vestigial workarounds for the MSVC6 compiler. We
573 haven't supported that in ages.
574 - The link authentication code has been refactored for better
575 testability and reliability. It now uses code generated with the
576 "trunnel" binary encoding generator, to reduce the risk of bugs
577 due to programmer error. Done as part of ticket 12498.
580 - Include a specific and (hopefully) accurate documentation of the
581 torrc file's meta-format in doc/torrc_format.txt. This is mainly
582 of interest to people writing programs to parse or generate torrc
583 files. This document is not a commitment to long-term
584 compatibility; some aspects of the current format are a bit
585 ridiculous. Closes ticket 2325.
588 - Tor no longer supports copies of OpenSSL that are missing support
589 for Elliptic Curve Cryptography. (We began using ECC when
590 available in 0.2.4.8-alpha, for more safe and efficient key
591 negotiation.) In particular, support for at least one of P256 or
592 P224 is now required, with manual configuration needed if only
593 P224 is available. Resolves ticket 16140.
594 - Tor no longer supports versions of OpenSSL before 1.0. (If you are
595 on an operating system that has not upgraded to OpenSSL 1.0 or
596 later, and you compile Tor from source, you will need to install a
597 more recent OpenSSL to link Tor against.) These versions of
598 OpenSSL are still supported by the OpenSSL, but the numerous
599 cryptographic improvements in later OpenSSL releases makes them a
600 clear choice. Resolves ticket 16034.
601 - Remove the HidServDirectoryV2 option. Now all relays offer to
602 store hidden service descriptors. Related to 16543.
603 - Remove the VoteOnHidServDirectoriesV2 option, since all
604 authorities have long set it to 1. Closes ticket 16543.
607 - Document use of coverity, clang static analyzer, and clang dynamic
608 undefined behavior and address sanitizers in doc/HACKING. Include
609 detailed usage instructions in the blacklist. Patch by "teor".
611 - The link authentication protocol code now has extensive tests.
612 - The relay descriptor signature testing code now has
614 - The test_workqueue program now runs faster, and is enabled by
615 default as a part of "make check".
616 - Now that OpenSSL has its own scrypt implementation, add an unit
617 test that checks for interoperability between libscrypt_scrypt()
618 and OpenSSL's EVP_PBE_scrypt() so that we could not use libscrypt
619 and rely on EVP_PBE_scrypt() whenever possible. Resolves
623 Changes in version 0.2.6.10 - 2015-07-12
624 Tor version 0.2.6.10 fixes some significant stability and hidden
625 service client bugs, bulletproofs the cryptography init process, and
626 fixes a bug when using the sandbox code with some older versions of
627 Linux. Everyone running an older version, especially an older version
628 of 0.2.6, should upgrade.
630 o Major bugfixes (hidden service clients, stability):
631 - Stop refusing to store updated hidden service descriptors on a
632 client. This reverts commit 9407040c59218 (which indeed fixed bug
633 14219, but introduced a major hidden service reachability
634 regression detailed in bug 16381). This is a temporary fix since
635 we can live with the minor issue in bug 14219 (it just results in
636 some load on the network) but the regression of 16381 is too much
637 of a setback. First-round fix for bug 16381; bugfix
640 o Major bugfixes (stability):
641 - Stop crashing with an assertion failure when parsing certain kinds
642 of malformed or truncated microdescriptors. Fixes bug 16400;
643 bugfix on 0.2.6.1-alpha. Found by "torkeln"; fix based on a patch
644 by "cypherpunks_backup".
645 - Stop random client-side assertion failures that could occur when
646 connecting to a busy hidden service, or connecting to a hidden
647 service while a NEWNYM is in progress. Fixes bug 16013; bugfix
650 o Minor features (geoip):
651 - Update geoip to the June 3 2015 Maxmind GeoLite2 Country database.
652 - Update geoip6 to the June 3 2015 Maxmind GeoLite2 Country database.
654 o Minor bugfixes (crypto error-handling):
655 - Check for failures from crypto_early_init, and refuse to continue.
656 A previous typo meant that we could keep going with an
657 uninitialized crypto library, and would have OpenSSL initialize
658 its own PRNG. Fixes bug 16360; bugfix on 0.2.5.2-alpha, introduced
659 when implementing ticket 4900. Patch by "teor".
661 o Minor bugfixes (Linux seccomp2 sandbox):
662 - Allow pipe() and pipe2() syscalls in the seccomp2 sandbox: we need
663 these when eventfd2() support is missing. Fixes bug 16363; bugfix
664 on 0.2.6.3-alpha. Patch from "teor".
667 Changes in version 0.2.6.9 - 2015-06-11
668 Tor 0.2.6.9 fixes a regression in the circuit isolation code, increases the
669 requirements for receiving an HSDir flag, and addresses some other small
670 bugs in the systemd and sandbox code. Clients using circuit isolation
671 should upgrade; all directory authorities should upgrade.
673 o Major bugfixes (client-side privacy):
674 - Properly separate out each SOCKSPort when applying stream
675 isolation. The error occurred because each port's session group was
676 being overwritten by a default value when the listener connection
677 was initialized. Fixes bug 16247; bugfix on 0.2.6.3-alpha. Patch
680 o Minor feature (directory authorities, security):
681 - The HSDir flag given by authorities now requires the Stable flag.
682 For the current network, this results in going from 2887 to 2806
683 HSDirs. Also, it makes it harder for an attacker to launch a sybil
684 attack by raising the effort for a relay to become Stable which
685 takes at the very least 7 days to do so and by keeping the 96
686 hours uptime requirement for HSDir. Implements ticket 8243.
688 o Minor bugfixes (compilation):
689 - Build with --enable-systemd correctly when libsystemd is
690 installed, but systemd is not. Fixes bug 16164; bugfix on
691 0.2.6.3-alpha. Patch from Peter Palfrader.
693 o Minor bugfixes (Linux seccomp2 sandbox):
694 - Fix sandboxing to work when running as a relaymby renaming of
695 secret_id_key, and allowing the eventfd2 and futex syscalls. Fixes
696 bug 16244; bugfix on 0.2.6.1-alpha. Patch by Peter Palfrader.
697 - Allow systemd connections to work with the Linux seccomp2 sandbox
698 code. Fixes bug 16212; bugfix on 0.2.6.2-alpha. Patch by
701 o Minor bugfixes (tests):
702 - Fix a crash in the unit tests when built with MSVC2013. Fixes bug
703 16030; bugfix on 0.2.6.2-alpha. Patch from "NewEraCracker".
706 Changes in version 0.2.6.8 - 2015-05-21
707 Tor 0.2.6.8 fixes a bit of dodgy code in parsing INTRODUCE2 cells, and
708 fixes an authority-side bug in assigning the HSDir flag. All directory
709 authorities should upgrade.
711 o Major bugfixes (hidden services, backport from 0.2.7.1-alpha):
712 - Revert commit that made directory authorities assign the HSDir
713 flag to relay without a DirPort; this was bad because such relays
714 can't handle BEGIN_DIR cells. Fixes bug 15850; bugfix
715 on tor-0.2.6.3-alpha.
717 o Minor bugfixes (hidden service, backport from 0.2.7.1-alpha):
718 - Fix an out-of-bounds read when parsing invalid INTRODUCE2 cells on
719 a client authorized hidden service. Fixes bug 15823; bugfix
722 o Minor features (geoip):
723 - Update geoip to the April 8 2015 Maxmind GeoLite2 Country database.
724 - Update geoip6 to the April 8 2015 Maxmind GeoLite2
728 Changes in version 0.2.7.1-alpha - 2015-05-12
729 Tor 0.2.7.1-alpha is the first alpha release in its series. It
730 includes numerous small features and bugfixes against previous Tor
731 versions, and numerous small infrastructure improvements. The most
732 notable features are several new ways for controllers to interact with
733 the hidden services subsystem.
735 o New system requirements:
736 - Tor no longer includes workarounds to support Libevent versions
737 before 1.3e. Libevent 2.0 or later is recommended. Closes
740 o Major features (controller):
741 - Add the ADD_ONION and DEL_ONION commands that allow the creation
742 and management of hidden services via the controller. Closes
744 - New "GETINFO onions/current" and "GETINFO onions/detached"
745 commands to get information about hidden services created via the
746 controller. Part of ticket 6411.
747 - New HSFETCH command to launch a request for a hidden service
748 descriptor. Closes ticket 14847.
749 - New HSPOST command to upload a hidden service descriptor. Closes
750 ticket 3523. Patch by "DonnchaC".
752 o Major bugfixes (hidden services):
753 - Revert commit that made directory authorities assign the HSDir
754 flag to relay without a DirPort; this was bad because such relays
755 can't handle BEGIN_DIR cells. Fixes bug 15850; bugfix
756 on tor-0.2.6.3-alpha.
758 o Minor features (clock-jump tolerance):
759 - Recover better when our clock jumps back many hours, like might
760 happen for Tails or Whonix users who start with a very wrong
761 hardware clock, use Tor to discover a more accurate time, and then
762 fix their clock. Resolves part of ticket 8766.
764 o Minor features (command-line interface):
765 - Make --hash-password imply --hush to prevent unnecessary noise.
766 Closes ticket 15542. Patch from "cypherpunks".
767 - Print a warning whenever we find a relative file path being used
768 as torrc option. Resolves issue 14018.
770 o Minor features (controller):
771 - Add DirAuthority lines for default directory authorities to the
772 output of the "GETINFO config/defaults" command if not already
773 present. Implements ticket 14840.
774 - Controllers can now use "GETINFO hs/client/desc/id/..." to
775 retrieve items from the client's hidden service descriptor cache.
777 - Implement a new controller command "GETINFO status/fresh-relay-
778 descs" to fetch a descriptor/extrainfo pair that was generated on
779 demand just for the controller's use. Implements ticket 14784.
781 o Minor features (DoS-resistance):
782 - Make it harder for attackers to overload hidden services with
783 introductions, by blocking multiple introduction requests on the
784 same circuit. Resolves ticket 15515.
786 o Minor features (geoip):
787 - Update geoip to the April 8 2015 Maxmind GeoLite2 Country database.
788 - Update geoip6 to the April 8 2015 Maxmind GeoLite2
791 o Minor features (HS popularity countermeasure):
792 - To avoid leaking HS popularity, don't cycle the introduction point
793 when we've handled a fixed number of INTRODUCE2 cells but instead
794 cycle it when a random number of introductions is reached, thus
795 making it more difficult for an attacker to find out the amount of
796 clients that have used the introduction point for a specific HS.
799 o Minor features (logging):
800 - Include the Tor version in all LD_BUG log messages, since people
801 tend to cut and paste those into the bugtracker. Implements
804 o Minor features (pluggable transports):
805 - When launching managed pluggable transports on Linux systems,
806 attempt to have the kernel deliver a SIGTERM on tor exit if the
807 pluggable transport process is still running. Resolves
809 - When launching managed pluggable transports, setup a valid open
810 stdin in the child process that can be used to detect if tor has
811 terminated. The "TOR_PT_EXIT_ON_STDIN_CLOSE" environment variable
812 can be used by implementations to detect this new behavior.
813 Resolves ticket 15435.
815 o Minor features (testing):
816 - Add a test to verify that the compiler does not eliminate our
817 memwipe() implementation. Closes ticket 15377.
818 - Add make rule `check-changes` to verify the format of changes
819 files. Closes ticket 15180.
820 - Add unit tests for control_event_is_interesting(). Add a compile-
821 time check that the number of events doesn't exceed the capacity
822 of control_event_t.event_mask. Closes ticket 15431, checks for
823 bugs similar to 13085. Patch by "teor".
824 - Command-line argument tests moved to Stem. Resolves ticket 14806.
825 - Integrate the ntor, backtrace, and zero-length keys tests into the
826 automake test suite. Closes ticket 15344.
827 - Remove assertions during builds to determine Tor's test coverage.
828 We don't want to trigger these even in assertions, so including
829 them artificially makes our branch coverage look worse than it is.
830 This patch provides the new test-stem-full and coverage-html-full
831 configure options. Implements ticket 15400.
833 o Minor bugfixes (build):
834 - Improve out-of-tree builds by making non-standard rules work and
835 clean up additional files and directories. Fixes bug 15053; bugfix
838 o Minor bugfixes (command-line interface):
839 - When "--quiet" is provided along with "--validate-config", do not
840 write anything to stdout on success. Fixes bug 14994; bugfix
842 - When complaining about bad arguments to "--dump-config", use
845 o Minor bugfixes (configuration, unit tests):
846 - Only add the default fallback directories when the DirAuthorities,
847 AlternateDirAuthority, and FallbackDir directory config options
848 are set to their defaults. The default fallback directory list is
849 currently empty, this fix will only change tor's behavior when it
850 has default fallback directories. Includes unit tests for
851 consider_adding_dir_servers(). Fixes bug 15642; bugfix on
852 90f6071d8dc0 in 0.2.4.7-alpha. Patch by "teor".
854 o Minor bugfixes (correctness):
855 - For correctness, avoid modifying a constant string in
856 handle_control_postdescriptor. Fixes bug 15546; bugfix
858 - Remove side-effects from tor_assert() calls. This was harmless,
859 because we never disable assertions, but it is bad style and
860 unnecessary. Fixes bug 15211; bugfix on 0.2.5.5, 0.2.2.36,
863 o Minor bugfixes (hidden service):
864 - Fix an out-of-bounds read when parsing invalid INTRODUCE2 cells on
865 a client authorized hidden service. Fixes bug 15823; bugfix
867 - Remove an extraneous newline character from the end of hidden
868 service descriptors. Fixes bug 15296; bugfix on 0.2.0.10-alpha.
870 o Minor bugfixes (interface):
871 - Print usage information for --dump-config when it is used without
872 an argument. Also, fix the error message to use different wording
873 and add newline at the end. Fixes bug 15541; bugfix
876 o Minor bugfixes (logs):
877 - When building Tor under Clang, do not include an extra set of
878 parentheses in log messages that include function names. Fixes bug
879 15269; bugfix on every released version of Tor when compiled with
882 o Minor bugfixes (network):
883 - When attempting to use fallback technique for network interface
884 lookup, disregard loopback and multicast addresses since they are
885 unsuitable for public communications.
887 o Minor bugfixes (statistics):
888 - Disregard the ConnDirectionStatistics torrc options when Tor is
889 not a relay since in that mode of operation no sensible data is
890 being collected and because Tor might run into measurement hiccups
891 when running as a client for some time, then becoming a relay.
892 Fixes bug 15604; bugfix on 0.2.2.35.
894 o Minor bugfixes (test networks):
895 - When self-testing reachability, use ExtendAllowPrivateAddresses to
896 determine if local/private addresses imply reachability. The
897 previous fix used TestingTorNetwork, which implies
898 ExtendAllowPrivateAddresses, but this excluded rare configurations
899 where ExtendAllowPrivateAddresses is set but TestingTorNetwork is
900 not. Fixes bug 15771; bugfix on 0.2.6.1-alpha. Patch by "teor",
901 issue discovered by CJ Ess.
903 o Minor bugfixes (testing):
904 - Check for matching value in server response in ntor_ref.py. Fixes
905 bug 15591; bugfix on 0.2.4.8-alpha. Reported and fixed
907 - Set the severity correctly when testing
908 get_interface_addresses_ifaddrs() and
909 get_interface_addresses_win32(), so that the tests fail gracefully
910 instead of triggering an assertion. Fixes bug 15759; bugfix on
911 0.2.6.3-alpha. Reported by Nicolas Derive.
913 o Code simplification and refactoring:
914 - Move the hacky fallback code out of get_interface_address6() into
915 separate function and get it covered with unit-tests. Resolves
917 - Refactor hidden service client-side cache lookup to intelligently
918 report its various failure cases, and disentangle failure cases
919 involving a lack of introduction points. Closes ticket 14391.
920 - Use our own Base64 encoder instead of OpenSSL's, to allow more
921 control over the output. Part of ticket 15652.
924 - Improve the descriptions of statistics-related torrc options in
925 the manpage to describe rationale and possible uses cases. Fixes
927 - Improve the layout and formatting of ./configure --help messages.
928 Closes ticket 15024. Patch from "cypherpunks".
929 - Standardize on the term "server descriptor" in the manual page.
930 Previously, we had used "router descriptor", "server descriptor",
931 and "relay descriptor" interchangeably. Part of ticket 14987.
934 - Remove `USE_OPENSSL_BASE64` and the corresponding fallback code
935 and always use the internal Base64 decoder. The internal decoder
936 has been part of tor since tor-0.2.0.10-alpha, and no one should
937 be using the OpenSSL one. Part of ticket 15652.
938 - Remove the 'tor_strclear()' function; use memwipe() instead.
942 - Remove the (seldom-used) DynamicDHGroups feature. For anti-
943 fingerprinting we now recommend pluggable transports; for forward-
944 secrecy in TLS, we now use the P-256 group. Closes ticket 13736.
945 - Remove the undocumented "--digests" command-line option. It
946 complicated our build process, caused subtle build issues on
947 multiple platforms, and is now redundant since we started
948 including git version identifiers. Closes ticket 14742.
949 - Tor no longer contains checks for ancient directory cache versions
950 that didn't know about microdescriptors.
951 - Tor no longer contains workarounds for stat files generated by
952 super-old versions of Tor that didn't choose guards sensibly.
955 Changes in version 0.2.4.27 - 2015-04-06
956 Tor 0.2.4.27 backports two fixes from 0.2.6.7 for security issues that
957 could be used by an attacker to crash hidden services, or crash clients
958 visiting hidden services. Hidden services should upgrade as soon as
959 possible; clients should upgrade whenever packages become available.
961 This release also backports a simple improvement to make hidden
962 services a bit less vulnerable to denial-of-service attacks.
964 o Major bugfixes (security, hidden service):
965 - Fix an issue that would allow a malicious client to trigger an
966 assertion failure and halt a hidden service. Fixes bug 15600;
967 bugfix on 0.2.1.6-alpha. Reported by "disgleirio".
968 - Fix a bug that could cause a client to crash with an assertion
969 failure when parsing a malformed hidden service descriptor. Fixes
970 bug 15601; bugfix on 0.2.1.5-alpha. Found by "DonnchaC".
972 o Minor features (DoS-resistance, hidden service):
973 - Introduction points no longer allow multiple INTRODUCE1 cells to
974 arrive on the same circuit. This should make it more expensive for
975 attackers to overwhelm hidden services with introductions.
976 Resolves ticket 15515.
979 Changes in version 0.2.6.7 - 2015-04-06
980 Tor 0.2.6.7 fixes two security issues that could be used by an
981 attacker to crash hidden services, or crash clients visiting hidden
982 services. Hidden services should upgrade as soon as possible; clients
983 should upgrade whenever packages become available.
985 This release also contains two simple improvements to make hidden
986 services a bit less vulnerable to denial-of-service attacks.
988 o Major bugfixes (security, hidden service):
989 - Fix an issue that would allow a malicious client to trigger an
990 assertion failure and halt a hidden service. Fixes bug 15600;
991 bugfix on 0.2.1.6-alpha. Reported by "disgleirio".
992 - Fix a bug that could cause a client to crash with an assertion
993 failure when parsing a malformed hidden service descriptor. Fixes
994 bug 15601; bugfix on 0.2.1.5-alpha. Found by "DonnchaC".
996 o Minor features (DoS-resistance, hidden service):
997 - Introduction points no longer allow multiple INTRODUCE1 cells to
998 arrive on the same circuit. This should make it more expensive for
999 attackers to overwhelm hidden services with introductions.
1000 Resolves ticket 15515.
1001 - Decrease the amount of reattempts that a hidden service performs
1002 when its rendezvous circuits fail. This reduces the computational
1003 cost for running a hidden service under heavy load. Resolves
1007 Changes in version 0.2.6.6 - 2015-03-24
1008 Tor 0.2.6.6 is the first stable release in the 0.2.6 series.
1010 It adds numerous safety, security, correctness, and performance
1011 improvements. Client programs can be configured to use more kinds of
1012 sockets, AutomapHosts works better, the multithreading backend is
1013 improved, cell transmission is refactored, test coverage is much
1014 higher, more denial-of-service attacks are handled, guard selection is
1015 improved to handle long-term guards better, pluggable transports
1016 should work a bit better, and some annoying hidden service performance
1017 bugs should be addressed.
1019 o Minor bugfixes (portability):
1020 - Use the correct datatype in the SipHash-2-4 function to prevent
1021 compilers from assuming any sort of alignment. Fixes bug 15436;
1022 bugfix on 0.2.5.3-alpha.
1024 Changes in version 0.2.6.5-rc - 2015-03-18
1025 Tor 0.2.6.5-rc is the second and (hopefully) last release candidate in
1026 the 0.2.6. It fixes a small number of bugs found in 0.2.6.4-rc.
1028 o Major bugfixes (client):
1029 - Avoid crashing when making certain configuration option changes on
1030 clients. Fixes bug 15245; bugfix on 0.2.6.3-alpha. Reported
1033 o Major bugfixes (pluggable transports):
1034 - Initialize the extended OR Port authentication cookie before
1035 launching pluggable transports. This prevents a race condition
1036 that occured when server-side pluggable transports would cache the
1037 authentication cookie before it has been (re)generated. Fixes bug
1038 15240; bugfix on 0.2.5.1-alpha.
1040 o Major bugfixes (portability):
1041 - Do not crash on startup when running on Solaris. Fixes a bug
1042 related to our fix for 9495; bugfix on 0.2.6.1-alpha. Reported
1045 o Minor features (heartbeat):
1046 - On relays, report how many connections we negotiated using each
1047 version of the Tor link protocols. This information will let us
1048 know if removing support for very old versions of the Tor
1049 protocols is harming the network. Closes ticket 15212.
1051 o Code simplification and refactoring:
1052 - Refactor main loop to extract the 'loop' part. This makes it
1053 easier to run Tor under Shadow. Closes ticket 15176.
1056 Changes in version 0.2.5.11 - 2015-03-17
1057 Tor 0.2.5.11 is the second stable release in the 0.2.5 series.
1059 It backports several bugfixes from the 0.2.6 branch, including a
1060 couple of medium-level security fixes for relays and exit nodes.
1061 It also updates the list of directory authorities.
1063 o Directory authority changes:
1064 - Remove turtles as a directory authority.
1065 - Add longclaw as a new (v3) directory authority. This implements
1066 ticket 13296. This keeps the directory authority count at 9.
1067 - The directory authority Faravahar has a new IP address. This
1068 closes ticket 14487.
1070 o Major bugfixes (crash, OSX, security):
1071 - Fix a remote denial-of-service opportunity caused by a bug in
1072 OSX's _strlcat_chk() function. Fixes bug 15205; bug first appeared
1075 o Major bugfixes (relay, stability, possible security):
1076 - Fix a bug that could lead to a relay crashing with an assertion
1077 failure if a buffer of exactly the wrong layout was passed to
1078 buf_pullup() at exactly the wrong time. Fixes bug 15083; bugfix on
1079 0.2.0.10-alpha. Patch from 'cypherpunks'.
1080 - Do not assert if the 'data' pointer on a buffer is advanced to the
1081 very end of the buffer; log a BUG message instead. Only assert if
1082 it is past that point. Fixes bug 15083; bugfix on 0.2.0.10-alpha.
1084 o Major bugfixes (exit node stability):
1085 - Fix an assertion failure that could occur under high DNS load.
1086 Fixes bug 14129; bugfix on Tor 0.0.7rc1. Found by "jowr";
1087 diagnosed and fixed by "cypherpunks".
1089 o Major bugfixes (Linux seccomp2 sandbox):
1090 - Upon receiving sighup with the seccomp2 sandbox enabled, do not
1091 crash during attempts to call wait4. Fixes bug 15088; bugfix on
1092 0.2.5.1-alpha. Patch from "sanic".
1094 o Minor features (controller):
1095 - New "GETINFO bw-event-cache" to get information about recent
1096 bandwidth events. Closes ticket 14128. Useful for controllers to
1097 get recent bandwidth history after the fix for ticket 13988.
1099 o Minor features (geoip):
1100 - Update geoip to the March 3 2015 Maxmind GeoLite2 Country database.
1101 - Update geoip6 to the March 3 2015 Maxmind GeoLite2
1104 o Minor bugfixes (client, automapping):
1105 - Avoid crashing on torrc lines for VirtualAddrNetworkIPv[4|6] when
1106 no value follows the option. Fixes bug 14142; bugfix on
1107 0.2.4.7-alpha. Patch by "teor".
1108 - Fix a memory leak when using AutomapHostsOnResolve. Fixes bug
1109 14195; bugfix on 0.1.0.1-rc.
1111 o Minor bugfixes (compilation):
1112 - Build without warnings with the stock OpenSSL srtp.h header, which
1113 has a duplicate declaration of SSL_get_selected_srtp_profile().
1114 Fixes bug 14220; this is OpenSSL's bug, not ours.
1116 o Minor bugfixes (directory authority):
1117 - Allow directory authorities to fetch more data from one another if
1118 they find themselves missing lots of votes. Previously, they had
1119 been bumping against the 10 MB queued data limit. Fixes bug 14261;
1120 bugfix on 0.1.2.5-alpha.
1121 - Enlarge the buffer to read bwauth generated files to avoid an
1122 issue when parsing the file in dirserv_read_measured_bandwidths().
1123 Fixes bug 14125; bugfix on 0.2.2.1-alpha.
1125 o Minor bugfixes (statistics):
1126 - Increase period over which bandwidth observations are aggregated
1127 from 15 minutes to 4 hours. Fixes bug 13988; bugfix on 0.0.8pre1.
1129 o Minor bugfixes (preventative security, C safety):
1130 - When reading a hexadecimal, base-32, or base-64 encoded value from
1131 a string, always overwrite the whole output buffer. This prevents
1132 some bugs where we would look at (but fortunately, not reveal)
1133 uninitialized memory on the stack. Fixes bug 14013; bugfix on all
1137 Changes in version 0.2.4.26 - 2015-03-17
1138 Tor 0.2.4.26 includes an updated list of directory authorities. It
1139 also backports a couple of stability and security bugfixes from 0.2.5
1142 o Directory authority changes:
1143 - Remove turtles as a directory authority.
1144 - Add longclaw as a new (v3) directory authority. This implements
1145 ticket 13296. This keeps the directory authority count at 9.
1146 - The directory authority Faravahar has a new IP address. This
1147 closes ticket 14487.
1149 o Major bugfixes (exit node stability, also in 0.2.6.3-alpha):
1150 - Fix an assertion failure that could occur under high DNS load.
1151 Fixes bug 14129; bugfix on Tor 0.0.7rc1. Found by "jowr";
1152 diagnosed and fixed by "cypherpunks".
1154 o Major bugfixes (relay, stability, possible security, also in 0.2.6.4-rc):
1155 - Fix a bug that could lead to a relay crashing with an assertion
1156 failure if a buffer of exactly the wrong layout was passed to
1157 buf_pullup() at exactly the wrong time. Fixes bug 15083; bugfix on
1158 0.2.0.10-alpha. Patch from 'cypherpunks'.
1159 - Do not assert if the 'data' pointer on a buffer is advanced to the
1160 very end of the buffer; log a BUG message instead. Only assert if
1161 it is past that point. Fixes bug 15083; bugfix on 0.2.0.10-alpha.
1163 o Minor features (geoip):
1164 - Update geoip to the March 3 2015 Maxmind GeoLite2 Country database.
1165 - Update geoip6 to the March 3 2015 Maxmind GeoLite2
1168 Changes in version 0.2.6.4-rc - 2015-03-09
1169 Tor 0.2.6.4-alpha fixes an issue in the directory code that an
1170 attacker might be able to use in order to crash certain Tor
1171 directories. It also resolves some minor issues left over from, or
1172 introduced in, Tor 0.2.6.3-alpha or earlier.
1174 o Major bugfixes (crash, OSX, security):
1175 - Fix a remote denial-of-service opportunity caused by a bug in
1176 OSX's _strlcat_chk() function. Fixes bug 15205; bug first appeared
1179 o Major bugfixes (relay, stability, possible security):
1180 - Fix a bug that could lead to a relay crashing with an assertion
1181 failure if a buffer of exactly the wrong layout is passed to
1182 buf_pullup() at exactly the wrong time. Fixes bug 15083; bugfix on
1183 0.2.0.10-alpha. Patch from "cypherpunks".
1184 - Do not assert if the 'data' pointer on a buffer is advanced to the
1185 very end of the buffer; log a BUG message instead. Only assert if
1186 it is past that point. Fixes bug 15083; bugfix on 0.2.0.10-alpha.
1188 o Major bugfixes (FreeBSD IPFW transparent proxy):
1189 - Fix address detection with FreeBSD transparent proxies, when
1190 "TransProxyType ipfw" is in use. Fixes bug 15064; bugfix
1193 o Major bugfixes (Linux seccomp2 sandbox):
1194 - Pass IPPROTO_TCP rather than 0 to socket(), so that the Linux
1195 seccomp2 sandbox doesn't fail. Fixes bug 14989; bugfix
1197 - Allow AF_UNIX hidden services to be used with the seccomp2
1198 sandbox. Fixes bug 15003; bugfix on 0.2.6.3-alpha.
1199 - Upon receiving sighup with the seccomp2 sandbox enabled, do not
1200 crash during attempts to call wait4. Fixes bug 15088; bugfix on
1201 0.2.5.1-alpha. Patch from "sanic".
1203 o Minor features (controller):
1204 - Messages about problems in the bootstrap process now include
1205 information about the server we were trying to connect to when we
1206 noticed the problem. Closes ticket 15006.
1208 o Minor features (geoip):
1209 - Update geoip to the March 3 2015 Maxmind GeoLite2 Country database.
1210 - Update geoip6 to the March 3 2015 Maxmind GeoLite2
1213 o Minor features (logs):
1214 - Quiet some log messages in the heartbeat and at startup. Closes
1217 o Minor bugfixes (certificate handling):
1218 - If an authority operator accidentally makes a signing certificate
1219 with a future publication time, do not discard its real signing
1220 certificates. Fixes bug 11457; bugfix on 0.2.0.3-alpha.
1221 - Remove any old authority certificates that have been superseded
1222 for at least two days. Previously, we would keep superseded
1223 certificates until they expired, if they were published close in
1224 time to the certificate that superseded them. Fixes bug 11454;
1225 bugfix on 0.2.1.8-alpha.
1227 o Minor bugfixes (compilation):
1228 - Fix a compilation warning on s390. Fixes bug 14988; bugfix
1230 - Fix a compilation warning on FreeBSD. Fixes bug 15151; bugfix
1233 o Minor bugfixes (testing):
1234 - Fix endianness issues in unit test for resolve_my_address() to
1235 have it pass on big endian systems. Fixes bug 14980; bugfix on
1237 - Avoid a side-effect in a tor_assert() in the unit tests. Fixes bug
1238 15188; bugfix on 0.1.2.3-alpha. Patch from Tom van der Woerdt.
1239 - When running the new 'make test-stem' target, use the configured
1240 python binary. Fixes bug 15037; bugfix on 0.2.6.3-alpha. Patch
1242 - When running the zero-length-keys tests, do not use the default
1243 torrc file. Fixes bug 15033; bugfix on 0.2.6.3-alpha. Reported
1246 o Directory authority IP change:
1247 - The directory authority Faravahar has a new IP address. This
1248 closes ticket 14487.
1251 - Remove some lingering dead code that once supported mempools.
1252 Mempools were disabled by default in 0.2.5, and removed entirely
1253 in 0.2.6.3-alpha. Closes more of ticket 14848; patch
1257 Changes in version 0.2.6.3-alpha - 2015-02-19
1258 Tor 0.2.6.3-alpha is the third (and hopefully final) alpha release in
1259 the 0.2.6.x series. It introduces support for more kinds of sockets,
1260 makes it harder to accidentally run an exit, improves our
1261 multithreading backend, incorporates several fixes for the
1262 AutomapHostsOnResolve option, and fixes numerous other bugs besides.
1264 If no major regressions or security holes are found in this version,
1265 the next version will be a release candidate.
1267 o Deprecated versions:
1268 - Tor relays older than 0.2.4.18-rc are no longer allowed to
1269 advertise themselves on the network. Closes ticket 13555.
1271 o Major features (security, unix domain sockets):
1272 - Allow SocksPort to be an AF_UNIX Unix Domain Socket. Now high risk
1273 applications can reach Tor without having to create AF_INET or
1274 AF_INET6 sockets, meaning they can completely disable their
1275 ability to make non-Tor network connections. To create a socket of
1276 this type, use "SocksPort unix:/path/to/socket". Implements
1278 - Support mapping hidden service virtual ports to AF_UNIX sockets.
1279 The syntax is "HiddenServicePort 80 unix:/path/to/socket".
1280 Implements ticket 11485.
1282 o Major features (changed defaults):
1283 - Prevent relay operators from unintentionally running exits: When a
1284 relay is configured as an exit node, we now warn the user unless
1285 the "ExitRelay" option is set to 1. We warn even more loudly if
1286 the relay is configured with the default exit policy, since this
1287 can indicate accidental misconfiguration. Setting "ExitRelay 0"
1288 stops Tor from running as an exit relay. Closes ticket 10067.
1290 o Major features (directory system):
1291 - When downloading server- or microdescriptors from a directory
1292 server, we no longer launch multiple simultaneous requests to the
1293 same server. This reduces load on the directory servers,
1294 especially when directory guards are in use. Closes ticket 9969.
1295 - When downloading server- or microdescriptors over a tunneled
1296 connection, do not limit the length of our requests to what the
1297 Squid proxy is willing to handle. Part of ticket 9969.
1298 - Authorities can now vote on the correct digests and latest
1299 versions for different software packages. This allows packages
1300 that include Tor to use the Tor authority system as a way to get
1301 notified of updates and their correct digests. Implements proposal
1302 227. Closes ticket 10395.
1304 o Major features (guards):
1305 - Introduce the Guardfraction feature to improves load balancing on
1306 guard nodes. Specifically, it aims to reduce the traffic gap that
1307 guard nodes experience when they first get the Guard flag. This is
1308 a required step if we want to increase the guard lifetime to 9
1309 months or greater. Closes ticket 9321.
1311 o Major features (performance):
1312 - Make the CPU worker implementation more efficient by avoiding the
1313 kernel and lengthening pipelines. The original implementation used
1314 sockets to transfer data from the main thread to the workers, and
1315 didn't allow any thread to be assigned more than a single piece of
1316 work at once. The new implementation avoids communications
1317 overhead by making requests in shared memory, avoiding kernel IO
1318 where possible, and keeping more requests in flight at once.
1319 Implements ticket 9682.
1321 o Major features (relay):
1322 - Raise the minimum acceptable configured bandwidth rate for bridges
1323 to 50 KiB/sec and for relays to 75 KiB/sec. (The old values were
1324 20 KiB/sec.) Closes ticket 13822.
1326 o Major bugfixes (exit node stability):
1327 - Fix an assertion failure that could occur under high DNS load.
1328 Fixes bug 14129; bugfix on Tor 0.0.7rc1. Found by "jowr";
1329 diagnosed and fixed by "cypherpunks".
1331 o Major bugfixes (mixed relay-client operation):
1332 - When running as a relay and client at the same time (not
1333 recommended), if we decide not to use a new guard because we want
1334 to retry older guards, only close the locally-originating circuits
1335 passing through that guard. Previously we would close all the
1336 circuits through that guard. Fixes bug 9819; bugfix on
1337 0.2.1.1-alpha. Reported by "skruffy".
1339 o Minor features (build):
1340 - New --disable-system-torrc compile-time option to prevent Tor from
1341 looking for the system-wide torrc or torrc-defaults files.
1342 Resolves ticket 13037.
1344 o Minor features (controller):
1345 - Include SOCKS_USERNAME and SOCKS_PASSWORD values in controller
1346 events so controllers can observe circuit isolation inputs. Closes
1348 - ControlPort now supports the unix:/path/to/socket syntax as an
1349 alternative to the ControlSocket option, for consistency with
1350 SocksPort and HiddenServicePort. Closes ticket 14451.
1351 - New "GETINFO bw-event-cache" to get information about recent
1352 bandwidth events. Closes ticket 14128. Useful for controllers to
1353 get recent bandwidth history after the fix for ticket 13988.
1355 o Minor features (Denial of service resistance):
1356 - Count the total number of bytes used storing hidden service
1357 descriptors against the value of MaxMemInQueues. If we're low on
1358 memory, and more than 20% of our memory is used holding hidden
1359 service descriptors, free them until no more than 10% of our
1360 memory holds hidden service descriptors. Free the least recently
1361 fetched descriptors first. Resolves ticket 13806.
1362 - When we have recently been under memory pressure (over 3/4 of
1363 MaxMemInQueues is allocated), then allocate smaller zlib objects
1364 for small requests. Closes ticket 11791.
1366 o Minor features (geoip):
1367 - Update geoip and geoip6 files to the January 7 2015 Maxmind
1368 GeoLite2 Country database.
1370 o Minor features (guard nodes):
1371 - Reduce the time delay before saving guard status to disk from 10
1372 minutes to 30 seconds (or from one hour to 10 minutes if
1373 AvoidDiskWrites is set). Closes ticket 12485.
1375 o Minor features (hidden service):
1376 - Make Sybil attacks against hidden services harder by changing the
1377 minimum time required to get the HSDir flag from 25 hours up to 96
1378 hours. Addresses ticket 14149.
1379 - New option "HiddenServiceAllowUnknownPorts" to allow hidden
1380 services to disable the anti-scanning feature introduced in
1381 0.2.6.2-alpha. With this option not set, a connection to an
1382 unlisted port closes the circuit. With this option set, only a
1383 RELAY_DONE cell is sent. Closes ticket 14084.
1385 o Minor features (interface):
1386 - Implement "-f -" command-line option to read torrc configuration
1387 from standard input, if you don't want to store the torrc file in
1388 the file system. Implements feature 13865.
1390 o Minor features (logging):
1391 - Add a count of unique clients to the bridge heartbeat message.
1392 Resolves ticket 6852.
1393 - Suppress "router info incompatible with extra info" message when
1394 reading extrainfo documents from cache. (This message got loud
1395 around when we closed bug 9812 in 0.2.6.2-alpha.) Closes
1397 - Elevate hidden service authorized-client message from DEBUG to
1398 INFO. Closes ticket 14015.
1400 o Minor features (stability):
1401 - Add assertions in our hash-table iteration code to check for
1402 corrupted values that could cause infinite loops. Closes
1405 o Minor features (systemd):
1406 - Various improvements and modernizations in systemd hardening
1407 support. Closes ticket 13805. Patch from Craig Andrews.
1409 o Minor features (testing networks):
1410 - Drop the minimum RendPostPeriod on a testing network to 5 seconds,
1411 and the default on a testing network to 2 minutes. Drop the
1412 MIN_REND_INITIAL_POST_DELAY on a testing network to 5 seconds, but
1413 keep the default on a testing network at 30 seconds. This reduces
1414 HS bootstrap time to around 25 seconds. Also, change the default
1415 time in test-network.sh to match. Closes ticket 13401. Patch
1417 - Create TestingDirAuthVoteHSDir to correspond to
1418 TestingDirAuthVoteExit/Guard. Ensures that authorities vote the
1419 HSDir flag for the listed relays regardless of uptime or ORPort
1420 connectivity. Respects the value of VoteOnHidServDirectoriesV2.
1421 Partial implementation for ticket 14067. Patch by "teor".
1423 o Minor features (tor2web mode):
1424 - Introduce the config option Tor2webRendezvousPoints, which allows
1425 clients in Tor2webMode to select a specific Rendezvous Point to be
1426 used in HS circuits. This might allow better performance for
1427 Tor2Web nodes. Implements ticket 12844.
1429 o Minor bugfixes (client DNS):
1430 - Report the correct cached DNS expiration times on SOCKS port or in
1431 DNS replies. Previously, we would report everything as "never
1432 expires." Fixes bug 14193; bugfix on 0.2.3.17-beta.
1433 - Avoid a small memory leak when we find a cached answer for a
1434 reverse DNS lookup in a client-side DNS cache. (Remember, client-
1435 side DNS caching is off by default, and is not recommended.) Fixes
1436 bug 14259; bugfix on 0.2.0.1-alpha.
1438 o Minor bugfixes (client, automapping):
1439 - Avoid crashing on torrc lines for VirtualAddrNetworkIPv[4|6] when
1440 no value follows the option. Fixes bug 14142; bugfix on
1441 0.2.4.7-alpha. Patch by "teor".
1442 - Fix a memory leak when using AutomapHostsOnResolve. Fixes bug
1443 14195; bugfix on 0.1.0.1-rc.
1444 - Prevent changes to other options from removing the wildcard value
1445 "." from "AutomapHostsSuffixes". Fixes bug 12509; bugfix
1447 - Allow MapAddress and AutomapHostsOnResolve to work together when
1448 an address is mapped into another address type (like .onion) that
1449 must be automapped at resolve time. Fixes bug 7555; bugfix
1452 o Minor bugfixes (client, bridges):
1453 - When we are using bridges and we had a network connectivity
1454 problem, only retry connecting to our currently configured
1455 bridges, not all bridges we know about and remember using. Fixes
1456 bug 14216; bugfix on 0.2.2.17-alpha.
1458 o Minor bugfixes (client, IPv6):
1459 - Reject socks requests to literal IPv6 addresses when IPv6Traffic
1460 flag is not set; and not because the NoIPv4Traffic flag was set.
1461 Previously we'd looked at the NoIPv4Traffic flag for both types of
1462 literal addresses. Fixes bug 14280; bugfix on 0.2.4.7-alpha.
1464 o Minor bugfixes (compilation):
1465 - The address of an array in the middle of a structure will always
1466 be non-NULL. clang recognises this and complains. Disable the
1467 tautologous and redundant check to silence this warning. Fixes bug
1468 14001; bugfix on 0.2.1.2-alpha.
1469 - Avoid warnings when building with systemd 209 or later. Fixes bug
1470 14072; bugfix on 0.2.6.2-alpha. Patch from "h.venev".
1471 - Compile correctly with (unreleased) OpenSSL 1.1.0 headers.
1472 Addresses ticket 14188.
1473 - Build without warnings with the stock OpenSSL srtp.h header, which
1474 has a duplicate declaration of SSL_get_selected_srtp_profile().
1475 Fixes bug 14220; this is OpenSSL's bug, not ours.
1476 - Do not compile any code related to Tor2Web mode when Tor2Web mode
1477 is not enabled at compile time. Previously, this code was included
1478 in a disabled state. See discussion on ticket 12844.
1479 - Remove the --disable-threads configure option again. It was
1480 accidentally partially reintroduced in 29ac883606d6d. Fixes bug
1481 14819; bugfix on 0.2.6.2-alpha.
1483 o Minor bugfixes (controller):
1484 - Report "down" in response to the "GETINFO entry-guards" command
1485 when relays are down with an unreachable_since value. Previously,
1486 we would report "up". Fixes bug 14184; bugfix on 0.1.2.2-alpha.
1487 - Avoid crashing on a malformed EXTENDCIRCUIT command. Fixes bug
1488 14116; bugfix on 0.2.2.9-alpha.
1489 - Add a code for the END_CIRC_REASON_IP_NOW_REDUNDANT circuit close
1490 reason. Fixes bug 14207; bugfix on 0.2.6.2-alpha.
1492 o Minor bugfixes (directory authority):
1493 - Allow directory authorities to fetch more data from one another if
1494 they find themselves missing lots of votes. Previously, they had
1495 been bumping against the 10 MB queued data limit. Fixes bug 14261;
1496 bugfix on 0.1.2.5-alpha.
1497 - Do not attempt to download extrainfo documents which we will be
1498 unable to validate with a matching server descriptor. Fixes bug
1499 13762; bugfix on 0.2.0.1-alpha.
1500 - Fix a bug that was truncating AUTHDIR_NEWDESC events sent to the
1501 control port. Fixes bug 14953; bugfix on 0.2.0.1-alpha.
1502 - Enlarge the buffer to read bwauth generated files to avoid an
1503 issue when parsing the file in dirserv_read_measured_bandwidths().
1504 Fixes bug 14125; bugfix on 0.2.2.1-alpha.
1506 o Minor bugfixes (file handling):
1507 - Stop failing when key files are zero-length. Instead, generate new
1508 keys, and overwrite the empty key files. Fixes bug 13111; bugfix
1509 on all versions of Tor. Patch by "teor".
1510 - Stop generating a fresh .old RSA onion key file when the .old file
1511 is missing. Fixes part of 13111; bugfix on 0.0.6rc1.
1512 - Avoid overwriting .old key files with empty key files.
1513 - Skip loading zero-length extrainfo store, router store, stats,
1514 state, and key files.
1515 - Avoid crashing when trying to reload a torrc specified as a
1516 relative path with RunAsDaemon turned on. Fixes bug 13397; bugfix
1519 o Minor bugfixes (hidden services):
1520 - Close the introduction circuit when we have no more usable intro
1521 points, instead of waiting for it to time out. This also ensures
1522 that no follow-up HS descriptor fetch is triggered when the
1523 circuit eventually times out. Fixes bug 14224; bugfix on 0.0.6.
1524 - When fetching a hidden service descriptor for a down service that
1525 was recently up, do not keep refetching until we try the same
1526 replica twice in a row. Fixes bug 14219; bugfix on 0.2.0.10-alpha.
1527 - Successfully launch Tor with a nonexistent hidden service
1528 directory. Our fix for bug 13942 didn't catch this case. Fixes bug
1529 14106; bugfix on 0.2.6.2-alpha.
1531 o Minor bugfixes (logging):
1532 - Avoid crashing when there are more log domains than entries in
1533 domain_list. Bugfix on 0.2.3.1-alpha.
1534 - Add a string representation for LD_SCHED. Fixes bug 14740; bugfix
1536 - Don't log messages to stdout twice when starting up. Fixes bug
1537 13993; bugfix on 0.2.6.1-alpha.
1539 o Minor bugfixes (parsing):
1540 - Stop accepting milliseconds (or other junk) at the end of
1541 descriptor publication times. Fixes bug 9286; bugfix on 0.0.2pre25.
1542 - Support two-number and three-number version numbers correctly, in
1543 case we change the Tor versioning system in the future. Fixes bug
1544 13661; bugfix on 0.0.8pre1.
1546 o Minor bugfixes (path counting):
1547 - When deciding whether the consensus lists any exit nodes, count
1548 the number listed in the consensus, not the number we have
1549 descriptors for. Fixes part of bug 14918; bugfix on 0.2.6.2-alpha.
1550 - When deciding whether we have any exit nodes, only examine
1551 ExitNodes when the ExitNodes option is actually set. Fixes part of
1552 bug 14918; bugfix on 0.2.6.2-alpha.
1553 - Get rid of redundant and possibly scary warnings that we are
1554 missing directory information while we bootstrap. Fixes part of
1555 bug 14918; bugfix on 0.2.6.2-alpha.
1557 o Minor bugfixes (portability):
1558 - Fix the ioctl()-based network interface lookup code so that it
1559 will work on systems that have variable-length struct ifreq, for
1561 - Fix scheduler compilation on targets where char is unsigned. Fixes
1562 bug 14764; bugfix on 0.2.6.2-alpha. Reported by Christian Kujau.
1564 o Minor bugfixes (sandbox):
1565 - Allow glibc fatal errors to be sent to stderr before Tor exits.
1566 Previously, glibc would try to write them to /dev/tty, and the
1567 sandbox would trap the call and make Tor exit prematurely. Fixes
1568 bug 14759; bugfix on 0.2.5.1-alpha.
1570 o Minor bugfixes (shutdown):
1571 - When shutting down, always call event_del() on lingering read or
1572 write events before freeing them. Otherwise, we risk double-frees
1573 or read-after-frees in event_base_free(). Fixes bug 12985; bugfix
1576 o Minor bugfixes (small memory leaks):
1577 - Avoid leaking memory when using IPv6 virtual address mappings.
1578 Fixes bug 14123; bugfix on 0.2.4.7-alpha. Patch by Tom van
1581 o Minor bugfixes (statistics):
1582 - Increase period over which bandwidth observations are aggregated
1583 from 15 minutes to 4 hours. Fixes bug 13988; bugfix on 0.0.8pre1.
1585 o Minor bugfixes (systemd support):
1586 - Fix detection and operation of systemd watchdog. Fixes part of bug
1587 14141; bugfix on 0.2.6.2-alpha. Patch from Tomasz Torcz.
1588 - Run correctly under systemd with the RunAsDaemon option set. Fixes
1589 part of bug 14141; bugfix on 0.2.5.7-rc. Patch from Tomasz Torcz.
1590 - Inform the systemd supervisor about more changes in the Tor
1591 process status. Implements part of ticket 14141. Patch from
1593 - Cause the "--disable-systemd" option to actually disable systemd
1594 support. Fixes bug 14350; bugfix on 0.2.6.2-alpha. Patch
1597 o Minor bugfixes (TLS):
1598 - Check more thoroughly throughout the TLS code for possible
1599 unlogged TLS errors. Possible diagnostic or fix for bug 13319.
1601 o Minor bugfixes (transparent proxy):
1602 - Use getsockname, not getsockopt, to retrieve the address for a
1603 TPROXY-redirected connection. Fixes bug 13796; bugfix
1606 o Code simplification and refactoring:
1607 - Move fields related to isolating and configuring client ports into
1608 a shared structure. Previously, they were duplicated across
1609 port_cfg_t, listener_connection_t, and edge_connection_t. Failure
1610 to copy them correctly had been the cause of at least one bug in
1611 the past. Closes ticket 8546.
1612 - Refactor the get_interface_addresses_raw() doom-function into
1613 multiple smaller and simpler subfunctions. Cover the resulting
1614 subfunctions with unit-tests. Fixes a significant portion of
1616 - Remove workaround in dirserv_thinks_router_is_hs_dir() that was
1617 only for version <= 0.2.2.24 which is now deprecated. Closes
1619 - Remove a test for a long-defunct broken version-one
1623 - Adding section on OpenBSD to our TUNING document. Thanks to mmcc
1624 for writing the OpenBSD-specific tips. Resolves ticket 13702.
1625 - Make the tor-resolve documentation match its help string and its
1626 options. Resolves part of ticket 14325.
1627 - Log a more useful error message from tor-resolve when failing to
1628 look up a hidden service address. Resolves part of ticket 14325.
1630 o Downgraded warnings:
1631 - Don't warn when we've attempted to contact a relay using the wrong
1632 ntor onion key. Closes ticket 9635.
1635 - To avoid confusion with the "ExitRelay" option, "ExitNode" is no
1636 longer silently accepted as an alias for "ExitNodes".
1637 - The --enable-mempool and --enable-buf-freelists options, which
1638 were originally created to work around bad malloc implementations,
1639 no longer exist. They were off-by-default in 0.2.5. Closes
1643 - Make the checkdir/perms test complete successfully even if the
1644 global umask is not 022. Fixes bug 14215; bugfix on 0.2.6.2-alpha.
1645 - Test that tor does not fail when key files are zero-length. Check
1646 that tor generates new keys, and overwrites the empty key files.
1647 - Test that tor generates new keys when keys are missing
1648 (existing behavior).
1649 - Test that tor does not overwrite key files that already contain
1650 data (existing behavior). Tests bug 13111. Patch by "teor".
1651 - New "make test-stem" target to run stem integration tests.
1652 Requires that the "STEM_SOURCE_DIR" environment variable be set.
1653 Closes ticket 14107.
1654 - Make the test_cmdline_args.py script work correctly on Windows.
1655 Patch from Gisle Vanem.
1656 - Move the slower unit tests into a new "./src/test/test-slow"
1657 binary that can be run independently of the other tests. Closes
1659 - Avoid undefined behavior when sampling huge values from the
1660 Laplace distribution. This made unittests fail on Raspberry Pi.
1661 Bug found by Device. Fixes bug 14090; bugfix on 0.2.6.2-alpha.
1664 Changes in version 0.2.6.2-alpha - 2014-12-31
1665 Tor 0.2.6.2-alpha is the second alpha release in the 0.2.6.x series.
1666 It introduces a major new backend for deciding when to send cells on
1667 channels, which should lead down the road to big performance
1668 increases. It contains security and statistics features for better
1669 work on hidden services, and numerous bugfixes.
1671 This release contains many new unit tests, along with major
1672 performance improvements for running testing networks using Chutney.
1673 Thanks to a series of patches contributed by "teor", testing networks
1674 should now bootstrap in seconds, rather than minutes.
1676 o Major features (relay, infrastructure):
1677 - Complete revision of the code that relays use to decide which cell
1678 to send next. Formerly, we selected the best circuit to write on
1679 each channel, but we didn't select among channels in any
1680 sophisticated way. Now, we choose the best circuits globally from
1681 among those whose channels are ready to deliver traffic.
1683 This patch implements a new inter-cmux comparison API, a global
1684 high/low watermark mechanism and a global scheduler loop for
1685 transmission prioritization across all channels as well as among
1686 circuits on one channel. This schedule is currently tuned to
1687 (tolerantly) avoid making changes in network performance, but it
1688 should form the basis for major circuit performance increases in
1689 the future. Code by Andrea; tuning by Rob Jansen; implements
1692 o Major features (hidden services):
1693 - Make HS port scanning more difficult by immediately closing the
1694 circuit when a user attempts to connect to a nonexistent port.
1695 Closes ticket 13667.
1696 - Add a HiddenServiceStatistics option that allows Tor relays to
1697 gather and publish statistics about the overall size and volume of
1698 hidden service usage. Specifically, when this option is turned on,
1699 an HSDir will publish an approximate number of hidden services
1700 that have published descriptors to it the past 24 hours. Also, if
1701 a relay has acted as a hidden service rendezvous point, it will
1702 publish the approximate amount of rendezvous cells it has relayed
1703 the past 24 hours. The statistics themselves are obfuscated so
1704 that the exact values cannot be derived. For more details see
1705 proposal 238, "Better hidden service stats from Tor relays". This
1706 feature is currently disabled by default. Implements feature 13192.
1708 o Major bugfixes (client, automap):
1709 - Repair automapping with IPv6 addresses. This automapping should
1710 have worked previously, but one piece of debugging code that we
1711 inserted to detect a regression actually caused the regression to
1712 manifest itself again. Fixes bug 13811 and bug 12831; bugfix on
1713 0.2.4.7-alpha. Diagnosed and fixed by Francisco Blas
1716 o Major bugfixes (hidden services):
1717 - When closing an introduction circuit that was opened in parallel
1718 with others, don't mark the introduction point as unreachable.
1719 Previously, the first successful connection to an introduction
1720 point would make the other introduction points get marked as
1721 having timed out. Fixes bug 13698; bugfix on 0.0.6rc2.
1723 o Directory authority changes:
1724 - Remove turtles as a directory authority.
1725 - Add longclaw as a new (v3) directory authority. This implements
1726 ticket 13296. This keeps the directory authority count at 9.
1728 o Major removed features:
1729 - Tor clients no longer support connecting to hidden services
1730 running on Tor 0.2.2.x and earlier; the Support022HiddenServices
1731 option has been removed. (There shouldn't be any hidden services
1732 running these versions on the network.) Closes ticket 7803.
1734 o Minor features (client):
1735 - Validate hostnames in SOCKS5 requests more strictly. If SafeSocks
1736 is enabled, reject requests with IP addresses as hostnames.
1737 Resolves ticket 13315.
1739 o Minor features (controller):
1740 - Add a "SIGNAL HEARTBEAT" controller command that tells Tor to
1741 write an unscheduled heartbeat message to the log. Implements
1744 o Minor features (geoip):
1745 - Update geoip and geoip6 to the November 15 2014 Maxmind GeoLite2
1748 o Minor features (hidden services):
1749 - When re-enabling the network, don't try to build introduction
1750 circuits until we have successfully built a circuit. This makes
1751 hidden services come up faster when the network is re-enabled.
1752 Patch from "akwizgran". Closes ticket 13447.
1753 - When we fail to retrieve a hidden service descriptor, send the
1754 controller an "HS_DESC FAILED" controller event. Implements
1756 - New HiddenServiceDirGroupReadable option to cause hidden service
1757 directories and hostname files to be created group-readable. Patch
1758 from "anon", David Stainton, and "meejah". Closes ticket 11291.
1760 o Minor features (systemd):
1761 - Where supported, when running with systemd, report successful
1762 startup to systemd. Part of ticket 11016. Patch by Michael Scherer.
1763 - When running with systemd, support systemd watchdog messages. Part
1764 of ticket 11016. Patch by Michael Scherer.
1766 o Minor features (transparent proxy):
1767 - Update the transparent proxy option checks to allow for both ipfw
1768 and pf on OS X. Closes ticket 14002.
1769 - Use the correct option when using IPv6 with transparent proxy
1770 support on Linux. Resolves 13808. Patch by Francisco Blas
1773 o Minor bugfixes (preventative security, C safety):
1774 - When reading a hexadecimal, base-32, or base-64 encoded value from
1775 a string, always overwrite the whole output buffer. This prevents
1776 some bugs where we would look at (but fortunately, not reveal)
1777 uninitialized memory on the stack. Fixes bug 14013; bugfix on all
1779 - Clear all memory targetted by tor_addr_{to,from}_sockaddr(), not
1780 just the part that's used. This makes it harder for data leak bugs
1781 to occur in the event of other programming failures. Resolves
1784 o Minor bugfixes (client, microdescriptors):
1785 - Use a full 256 bits of the SHA256 digest of a microdescriptor when
1786 computing which microdescriptors to download. This keeps us from
1787 erroneous download behavior if two microdescriptor digests ever
1788 have the same first 160 bits. Fixes part of bug 13399; bugfix
1790 - Reset a router's status if its microdescriptor digest changes,
1791 even if the first 160 bits remain the same. Fixes part of bug
1792 13399; bugfix on 0.2.3.1-alpha.
1794 o Minor bugfixes (compilation):
1795 - Silence clang warnings under --enable-expensive-hardening,
1796 including implicit truncation of 64 bit values to 32 bit, const
1797 char assignment to self, tautological compare, and additional
1798 parentheses around equality tests. Fixes bug 13577; bugfix
1800 - Fix a clang warning about checking whether an address in the
1801 middle of a structure is NULL. Fixes bug 14001; bugfix
1804 o Minor bugfixes (hidden services):
1805 - Correctly send a controller event when we find that a rendezvous
1806 circuit has finished. Fixes bug 13936; bugfix on 0.1.1.5-alpha.
1807 - Pre-check directory permissions for new hidden-services to avoid
1808 at least one case of "Bug: Acting on config options left us in a
1809 broken state. Dying." Fixes bug 13942; bugfix on 0.0.6pre1.
1810 - When adding a new hidden service (for example, via SETCONF), Tor
1811 no longer congratulates the user for running a relay. Fixes bug
1812 13941; bugfix on 0.2.6.1-alpha.
1813 - When fetching hidden service descriptors, we now check not only
1814 for whether we got the hidden service we had in mind, but also
1815 whether we got the particular descriptors we wanted. This prevents
1816 a class of inefficient but annoying DoS attacks by hidden service
1817 directories. Fixes bug 13214; bugfix on 0.2.1.6-alpha. Reported
1820 o Minor bugfixes (Linux seccomp2 sandbox):
1821 - Make transparent proxy support work along with the seccomp2
1822 sandbox. Fixes part of bug 13808; bugfix on 0.2.5.1-alpha. Patch
1823 by Francisco Blas Izquierdo Riera.
1824 - Fix a memory leak in tor-resolve when running with the sandbox
1825 enabled. Fixes bug 14050; bugfix on 0.2.5.9-rc.
1827 o Minor bugfixes (logging):
1828 - Downgrade warnings about RSA signature failures to info log level.
1829 Emit a warning when an extra info document is found incompatible
1830 with a corresponding router descriptor. Fixes bug 9812; bugfix
1832 - Make connection_ap_handshake_attach_circuit() log the circuit ID
1833 correctly. Fixes bug 13701; bugfix on 0.0.6.
1835 o Minor bugfixes (misc):
1836 - Stop allowing invalid address patterns like "*/24" that contain
1837 both a wildcard address and a bit prefix length. This affects all
1838 our address-range parsing code. Fixes bug 7484; bugfix
1841 o Minor bugfixes (testing networks, fast startup):
1842 - Allow Tor to build circuits using a consensus with no exits. If
1843 the consensus has no exits (typical of a bootstrapping test
1844 network), allow Tor to build circuits once enough descriptors have
1845 been downloaded. This assists in bootstrapping a testing Tor
1846 network. Fixes bug 13718; bugfix on 0.2.4.10-alpha. Patch
1848 - When V3AuthVotingInterval is low, give a lower If-Modified-Since
1849 header to directory servers. This allows us to obtain consensuses
1850 promptly when the consensus interval is very short. This assists
1851 in bootstrapping a testing Tor network. Fixes parts of bugs 13718
1852 and 13963; bugfix on 0.2.0.3-alpha. Patch by "teor".
1853 - Stop assuming that private addresses are local when checking
1854 reachability in a TestingTorNetwork. Instead, when testing, assume
1855 all OR connections are remote. (This is necessary due to many test
1856 scenarios running all relays on localhost.) This assists in
1857 bootstrapping a testing Tor network. Fixes bug 13924; bugfix on
1858 0.1.0.1-rc. Patch by "teor".
1859 - Avoid building exit circuits from a consensus with no exits. Now
1860 thanks to our fix for 13718, we accept a no-exit network as not
1861 wholly lost, but we need to remember not to try to build exit
1862 circuits on it. Closes ticket 13814; patch by "teor".
1863 - Stop requiring exits to have non-zero bandwithcapacity in a
1864 TestingTorNetwork. Instead, when TestingMinExitFlagThreshold is 0,
1865 ignore exit bandwidthcapacity. This assists in bootstrapping a
1866 testing Tor network. Fixes parts of bugs 13718 and 13839; bugfix
1867 on 0.2.0.3-alpha. Patch by "teor".
1868 - Add "internal" to some bootstrap statuses when no exits are
1869 available. If the consensus does not contain Exits, Tor will only
1870 build internal circuits. In this case, relevant statuses will
1871 contain the word "internal" as indicated in the Tor control-
1872 spec.txt. When bootstrap completes, Tor will be ready to build
1873 internal circuits. If a future consensus contains Exits, exit
1874 circuits may become available. Fixes part of bug 13718; bugfix on
1875 0.2.4.10-alpha. Patch by "teor".
1876 - Decrease minimum consensus interval to 10 seconds when
1877 TestingTorNetwork is set, or 5 seconds for the first consensus.
1878 Fix assumptions throughout the code that assume larger intervals.
1879 Fixes bugs 13718 and 13823; bugfix on 0.2.0.3-alpha. Patch
1881 - Avoid excluding guards from path building in minimal test
1882 networks, when we're in a test network and excluding guards would
1883 exclude all relays. This typically occurs in incredibly small tor
1884 networks, and those using "TestingAuthVoteGuard *". Fixes part of
1885 bug 13718; bugfix on 0.1.1.11-alpha. Patch by "teor".
1887 o Code simplification and refactoring:
1888 - Stop using can_complete_circuits as a global variable; access it
1889 with a function instead.
1890 - Avoid using operators directly as macro arguments: this lets us
1891 apply coccinelle transformations to our codebase more directly.
1892 Closes ticket 13172.
1893 - Combine the functions used to parse ClientTransportPlugin and
1894 ServerTransportPlugin into a single function. Closes ticket 6456.
1895 - Add inline functions and convenience macros for inspecting channel
1896 state. Refactor the code to use convenience macros instead of
1897 checking channel state directly. Fixes issue 7356.
1898 - Document all members of was_router_added_t and rename
1899 ROUTER_WAS_NOT_NEW to ROUTER_IS_ALREADY_KNOWN to make it less
1900 confusable with ROUTER_WAS_TOO_OLD. Fixes issue 13644.
1901 - In connection_exit_begin_conn(), use END_CIRC_REASON_TORPROTOCOL
1902 constant instead of hardcoded value. Fixes issue 13840.
1903 - Refactor our generic strmap and digestmap types into a single
1904 implementation, so that we can add a new digest256map
1908 - Document the bridge-authority-only 'networkstatus-bridges' file.
1909 Closes ticket 13713; patch from "tom".
1910 - Fix typo in PredictedPortsRelevanceTime option description in
1911 manpage. Resolves issue 13707.
1912 - Stop suggesting that users specify relays by nickname: it isn't a
1913 good idea. Also, properly cross-reference how to specify relays in
1914 all parts of manual documenting options that take a list of
1915 relays. Closes ticket 13381.
1916 - Clarify the HiddenServiceDir option description in manpage to make
1917 it clear that relative paths are taken with respect to the current
1918 working directory. Also clarify that this behavior is not
1919 guaranteed to remain indefinitely. Fixes issue 13913.
1922 - New tests for many parts of channel, relay, and circuitmux
1923 functionality. Code by Andrea; part of 9262.
1924 - New tests for parse_transport_line(). Part of ticket 6456.
1925 - In the unit tests, use chgrp() to change the group of the unit
1926 test temporary directory to the current user, so that the sticky
1927 bit doesn't interfere with tests that check directory groups.
1929 - Add unit tests for resolve_my_addr(). Part of ticket 12376; patch
1933 Changes in version 0.2.6.1-alpha - 2014-10-30
1934 Tor 0.2.6.1-alpha is the first release in the Tor 0.2.6.x series. It
1935 includes numerous code cleanups and new tests, and fixes a large
1936 number of annoying bugs. Out-of-memory conditions are handled better
1937 than in 0.2.5, pluggable transports have improved proxy support, and
1938 clients now use optimistic data for contacting hidden services. Also,
1939 we are now more robust to changes in what we consider a parseable
1940 directory object, so that tightening restrictions does not have a risk
1941 of introducing infinite download loops.
1943 This is the first alpha release in a new series, so expect there to be
1944 bugs. Users who would rather test out a more stable branch should stay
1945 with 0.2.5.x for now.
1947 o New compiler and system requirements:
1948 - Tor 0.2.6.x requires that your compiler support more of the C99
1949 language standard than before. The 'configure' script now detects
1950 whether your compiler supports C99 mid-block declarations and
1951 designated initializers. If it does not, Tor will not compile.
1953 We may revisit this requirement if it turns out that a significant
1954 number of people need to build Tor with compilers that don't
1955 bother implementing a 15-year-old standard. Closes ticket 13233.
1956 - Tor no longer supports systems without threading support. When we
1957 began working on Tor, there were several systems that didn't have
1958 threads, or where the thread support wasn't able to run the
1959 threads of a single process on multiple CPUs. That no longer
1960 holds: every system where Tor needs to run well now has threading
1961 support. Resolves ticket 12439.
1963 o Removed platform support:
1964 - We no longer include special code to build on Windows CE; as far
1965 as we know, nobody has used Tor on Windows CE in a very long time.
1966 Closes ticket 11446.
1968 o Major features (bridges):
1969 - Expose the outgoing upstream HTTP/SOCKS proxy to pluggable
1970 transports if they are configured via the "TOR_PT_PROXY"
1971 environment variable. Implements proposal 232. Resolves
1974 o Major features (client performance, hidden services):
1975 - Allow clients to use optimistic data when connecting to a hidden
1976 service, which should remove a round-trip from hidden service
1977 initialization. See proposal 181 for details. Implements
1980 o Major features (directory system):
1981 - Upon receiving an unparseable directory object, if its digest
1982 matches what we expected, then don't try to download it again.
1983 Previously, when we got a descriptor we didn't like, we would keep
1984 trying to download it over and over. Closes ticket 11243.
1986 o Major features (sample torrc):
1987 - Add a new, infrequently-changed "torrc.minimal". This file is
1988 similar to torrc.sample, but it will change as infrequently as
1989 possible, for the benefit of users whose systems prompt them for
1990 intervention whenever a default configuration file is changed.
1991 Making this change allows us to update torrc.sample to be a more
1992 generally useful "sample torrc".
1994 o Major bugfixes (directory authorities):
1995 - Do not assign the HSDir flag to relays if they are not Valid, or
1996 currently hibernating. Fixes 12573; bugfix on 0.2.0.10-alpha.
1998 o Major bugfixes (directory bandwidth performance):
1999 - Don't flush the zlib buffer aggressively when compressing
2000 directory information for clients. This should save about 7% of
2001 the bandwidth currently used for compressed descriptors and
2002 microdescriptors. Fixes bug 11787; bugfix on 0.1.1.23.
2004 o Minor features (security, memory wiping):
2005 - Ensure we securely wipe keys from memory after
2006 crypto_digest_get_digest and init_curve25519_keypair_from_file
2007 have finished using them. Resolves ticket 13477.
2009 o Minor features (security, out-of-memory handling):
2010 - When handling an out-of-memory condition, allocate less memory for
2011 temporary data structures. Fixes issue 10115.
2012 - When handling an out-of-memory condition, consider more types of
2013 buffers, including those on directory connections, and zlib
2014 buffers. Resolves ticket 11792.
2017 - When identity keypair is generated for first time, log a
2018 congratulatory message that links to the new relay lifecycle
2019 document. Implements feature 10427.
2021 o Minor features (client):
2022 - Clients are now willing to send optimistic data (before they
2023 receive a 'connected' cell) to relays of any version. (Relays
2024 without support for optimistic data are no longer supported on the
2025 Tor network.) Resolves ticket 13153.
2027 o Minor features (directory authorities):
2028 - Don't list relays with a bandwidth estimate of 0 in the consensus.
2029 Implements a feature proposed during discussion of bug 13000.
2030 - In tor-gencert, report an error if the user provides the same
2031 argument more than once.
2032 - If a directory authority can't find a best consensus method in the
2033 votes that it holds, it now falls back to its favorite consensus
2034 method. Previously, it fell back to method 1. Neither of these is
2035 likely to get enough signatures, but "fall back to favorite"
2036 doesn't require us to maintain support an obsolete consensus
2037 method. Implements part of proposal 215.
2039 o Minor features (logging):
2040 - On Unix-like systems, you can now use named pipes as the target of
2041 the Log option, and other options that try to append to files.
2042 Closes ticket 12061. Patch from "carlo von lynX".
2043 - When opening a log file at startup, send it every log message that
2044 we generated between startup and opening it. Previously, log
2045 messages that were generated before opening the log file were only
2046 logged to stdout. Closes ticket 6938.
2047 - Add a TruncateLogFile option to overwrite logs instead of
2048 appending to them. Closes ticket 5583.
2050 o Minor features (portability, Solaris):
2051 - Threads are no longer disabled by default on Solaris; we believe
2052 that the versions of Solaris with broken threading support are all
2053 obsolete by now. Resolves ticket 9495.
2055 o Minor features (relay):
2056 - Re-check our address after we detect a changed IP address from
2057 getsockname(). This ensures that the controller command "GETINFO
2058 address" will report the correct value. Resolves ticket 11582.
2060 - A new AccountingRule option lets Relays set whether they'd like
2061 AccountingMax to be applied separately to inbound and outbound
2062 traffic, or applied to the sum of inbound and outbound traffic.
2063 Resolves ticket 961. Patch by "chobe".
2065 o Minor features (testing networks):
2066 - Add the TestingDirAuthVoteExit option, which lists nodes to assign
2067 the "Exit" flag regardless of their uptime, bandwidth, or exit
2068 policy. TestingTorNetwork must be set for this option to have any
2069 effect. Previously, authorities would take up to 35 minutes to
2070 give nodes the Exit flag in a test network. Partially implements
2073 o Minor features (validation):
2074 - Check all date/time values passed to tor_timegm and
2075 parse_rfc1123_time for validity, taking leap years into account.
2076 Improves HTTP header validation. Implemented with bug 13476.
2077 - In correct_tm(), limit the range of values returned by system
2078 localtime(_r) and gmtime(_r) to be between the years 1 and 8099.
2079 This means we don't have to deal with negative or too large dates,
2080 even if a clock is wrong. Otherwise we might fail to read a file
2081 written by us which includes such a date. Fixes bug 13476.
2083 o Minor bugfixes (bridge clients):
2084 - When configured to use a bridge without an identity digest (not
2085 recommended), avoid launching an extra channel to it when
2086 bootstrapping. Fixes bug 7733; bugfix on 0.2.4.4-alpha.
2088 o Minor bugfixes (bridges):
2089 - When DisableNetwork is set, do not launch pluggable transport
2090 plugins, and if any are running, terminate them. Fixes bug 13213;
2091 bugfix on 0.2.3.6-alpha.
2093 o Minor bugfixes (C correctness):
2094 - Fix several instances of possible integer overflow/underflow/NaN.
2095 Fixes bug 13104; bugfix on 0.2.3.1-alpha and later. Patches
2097 - In circuit_build_times_calculate_timeout() in circuitstats.c,
2098 avoid dividing by zero in the pareto calculations. This traps
2099 under clang's "undefined-trap" sanitizer. Fixes bug 13290; bugfix
2101 - Fix an integer overflow in format_time_interval(). Fixes bug
2102 13393; bugfix on 0.2.0.10-alpha.
2103 - Set the correct day of year value when the system's localtime(_r)
2104 or gmtime(_r) functions fail to set struct tm. Not externally
2105 visible. Fixes bug 13476; bugfix on 0.0.2pre14.
2106 - Avoid unlikely signed integer overflow in tor_timegm on systems
2107 with 32-bit time_t. Fixes bug 13476; bugfix on 0.0.2pre14.
2109 o Minor bugfixes (client):
2110 - Fix smartlist_choose_node_by_bandwidth() so that relays with the
2111 BadExit flag are not considered worthy candidates. Fixes bug
2112 13066; bugfix on 0.1.2.3-alpha.
2113 - Use the consensus schedule for downloading consensuses, and not
2114 the generic schedule. Fixes bug 11679; bugfix on 0.2.2.6-alpha.
2115 - Handle unsupported or malformed SOCKS5 requests properly by
2116 responding with the appropriate error message before closing the
2117 connection. Fixes bugs 12971 and 13314; bugfix on 0.0.2pre13.
2119 o Minor bugfixes (client, torrc):
2120 - Stop modifying the value of our DirReqStatistics torrc option just
2121 because we're not a bridge or relay. This bug was causing Tor
2122 Browser users to write "DirReqStatistics 0" in their torrc files
2123 as if they had chosen to change the config. Fixes bug 4244; bugfix
2125 - When GeoIPExcludeUnknown is enabled, do not incorrectly decide
2126 that our options have changed every time we SIGHUP. Fixes bug
2127 9801; bugfix on 0.2.4.10-alpha. Patch from "qwerty1".
2129 o Minor bugfixes (controller):
2130 - Return an error when the second or later arguments of the
2131 "setevents" controller command are invalid events. Previously we
2132 would return success while silently skipping invalid events. Fixes
2133 bug 13205; bugfix on 0.2.3.2-alpha. Reported by "fpxnns".
2135 o Minor bugfixes (directory system):
2136 - Always believe that v3 directory authorities serve extra-info
2137 documents, whether they advertise "caches-extra-info" or not.
2138 Fixes part of bug 11683; bugfix on 0.2.0.1-alpha.
2139 - When running as a v3 directory authority, advertise that you serve
2140 extra-info documents so that clients who want them can find them
2141 from you too. Fixes part of bug 11683; bugfix on 0.2.0.1-alpha.
2142 - Check the BRIDGE_DIRINFO flag bitwise rather than using equality.
2143 Previously, directories offering BRIDGE_DIRINFO and some other
2144 flag (i.e. microdescriptors or extrainfo) would be ignored when
2145 looking for bridges. Partially fixes bug 13163; bugfix
2148 o Minor bugfixes (networking):
2149 - Check for orconns and use connection_or_close_for_error() rather
2150 than connection_mark_for_close() directly in the getsockopt()
2151 failure case of connection_handle_write_impl(). Fixes bug 11302;
2152 bugfix on 0.2.4.4-alpha.
2154 o Minor bugfixes (relay):
2155 - When generating our family list, remove spaces from around the
2156 entries. Fixes bug 12728; bugfix on 0.2.1.7-alpha.
2157 - If our previous bandwidth estimate was 0 bytes, allow publishing a
2158 new relay descriptor immediately. Fixes bug 13000; bugfix
2161 o Minor bugfixes (testing networks):
2162 - Fix TestingDirAuthVoteGuard to properly give out Guard flags in a
2163 testing network. Fixes bug 13064; bugfix on 0.2.5.2-alpha.
2164 - Stop using the default authorities in networks which provide both
2165 AlternateDirAuthority and AlternateBridgeAuthority. Partially
2166 fixes bug 13163; bugfix on 0.2.0.13-alpha.
2168 o Minor bugfixes (testing):
2169 - Stop spawn test failures due to a race condition between the
2170 SIGCHLD handler updating the process status, and the test reading
2171 it. Fixes bug 13291; bugfix on 0.2.3.3-alpha.
2173 o Minor bugfixes (testing, Windows):
2174 - Avoid passing an extra backslash when creating a temporary
2175 directory for running the unit tests on Windows. Fixes bug 12392;
2176 bugfix on 0.2.2.25-alpha. Patch from Gisle Vanem.
2178 o Minor bugfixes (windows):
2179 - Remove code to special-case handling of NTE_BAD_KEYSET when
2180 acquiring windows CryptoAPI context. This error can't actually
2181 occur for the parameters we're providing. Fixes bug 10816; bugfix
2184 o Minor bugfixes (zlib):
2185 - Avoid truncating a zlib stream when trying to finalize it with an
2186 empty output buffer. Fixes bug 11824; bugfix on 0.1.1.23.
2189 - Allow our configure script to build correctly with autoconf 2.62
2190 again. Fixes bug 12693; bugfix on 0.2.5.2-alpha.
2191 - Improve the error message from ./configure to make it clear that
2192 when asciidoc has not been found, the user will have to either add
2193 --disable-asciidoc argument or install asciidoc. Resolves
2196 o Code simplification and refactoring:
2197 - Change the entry_is_live() function to take named bitfield
2198 elements instead of an unnamed list of booleans. Closes
2200 - Refactor and unit-test entry_is_time_to_retry() in entrynodes.c.
2201 Resolves ticket 12205.
2202 - Use calloc and reallocarray functions instead of multiply-
2203 then-malloc. This makes it less likely for us to fall victim to an
2204 integer overflow attack when allocating. Resolves ticket 12855.
2205 - Use the standard macro name SIZE_MAX, instead of our
2207 - Document usage of the NO_DIRINFO and ALL_DIRINFO flags clearly in
2208 functions which take them as arguments. Replace 0 with NO_DIRINFO
2209 in a function call for clarity. Seeks to prevent future issues
2211 - Avoid 4 null pointer errors under clang static analysis by using
2212 tor_assert() to prove that the pointers aren't null. Fixes
2214 - Rework the API of policies_parse_exit_policy() to use a bitmask to
2215 represent parsing options, instead of a confusing mess of
2216 booleans. Resolves ticket 8197.
2217 - Introduce a helper function to parse ExitPolicy in
2218 or_options_t structure.
2221 - Add a doc/TUNING document with tips for handling large numbers of
2222 TCP connections when running busy Tor relay. Update the warning
2223 message to point to this file when running out of sockets
2224 operating system is allowing to use simultaneously. Resolves
2228 - We no longer remind the user about configuration options that have
2229 been obsolete since 0.2.3.x or earlier. Patch by Adrien Bak.
2230 - Remove our old, non-weighted bandwidth-based node selection code.
2231 Previously, we used it as a fallback when we couldn't perform
2232 weighted bandwidth-based node selection. But that would only
2233 happen in the cases where we had no consensus, or when we had a
2234 consensus generated by buggy or ancient directory authorities. In
2235 either case, it's better to use the more modern, better maintained
2236 algorithm, with reasonable defaults for the weights. Closes
2238 - Remove the --disable-curve25519 configure option. Relays and
2239 clients now are required to support curve25519 and the
2241 - The old "StrictEntryNodes" and "StrictExitNodes" options, which
2242 used to be deprecated synonyms for "StrictNodes", are now marked
2243 obsolete. Resolves ticket 12226.
2244 - Clients don't understand the BadDirectory flag in the consensus
2245 anymore, and ignore it.
2248 - Refactor the function that chooses guard nodes so that it can more
2249 easily be tested; write some tests for it.
2250 - Fix and re-enable the fgets_eagain unit test. Fixes bug 12503;
2251 bugfix on 0.2.3.1-alpha. Patch from "cypherpunks."
2252 - Create unit tests for format_time_interval(). With bug 13393.
2253 - Add unit tests for tor_timegm signed overflow, tor_timegm and
2254 parse_rfc1123_time validity checks, correct_tm year clamping. Unit
2255 tests (visible) fixes in bug 13476.
2256 - Add a "coverage-html" make target to generate HTML-visualized
2257 coverage results when building with --enable-coverage. (Requires
2258 lcov.) Patch from Kevin Murray.
2259 - Enable the backtrace handler (where supported) when running the
2261 - Revise all unit tests that used the legacy test_* macros to
2262 instead use the recommended tt_* macros. This patch was generated
2263 with coccinelle, to avoid manual errors. Closes ticket 13119.
2265 o Distribution (systemd):
2266 - systemd unit file: only allow tor to write to /var/lib/tor and
2267 /var/log/tor. The rest of the filesystem is accessible for reading
2268 only. Patch by intrigeri; resolves ticket 12751.
2269 - systemd unit file: ensure that the process and all its children
2270 can never gain new privileges. Patch by intrigeri; resolves
2272 - systemd unit file: set up /var/run/tor as writable for the Tor
2273 service. Patch by intrigeri; resolves ticket 13196.
2275 o Removed features (directory authorities):
2276 - Remove code that prevented authorities from listing Tor relays
2277 affected by CVE-2011-2769 as guards. These relays are already
2278 rejected altogether due to the minimum version requirement of
2279 0.2.3.16-alpha. Closes ticket 13152.
2280 - The "AuthDirRejectUnlisted" option no longer has any effect, as
2281 the fingerprints file (approved-routers) has been deprecated.
2282 - Directory authorities do not support being Naming dirauths anymore.
2283 The "NamingAuthoritativeDir" config option is now obsolete.
2284 - Directory authorities do not support giving out the BadDirectory
2286 - Directory authorities no longer advertise or support consensus
2287 methods 1 through 12 inclusive. These consensus methods were
2288 obsolete and/or insecure: maintaining the ability to support them
2289 served no good purpose. Implements part of proposal 215; closes
2292 o Testing (test-network.sh):
2293 - Stop using "echo -n", as some shells' built-in echo doesn't
2294 support "-n". Instead, use "/bin/echo -n". Partially fixes
2296 - Stop an apparent test-network hang when used with make -j2. Fixes
2298 - Add a --delay option to test-network.sh, which configures the
2299 delay before the chutney network tests for data transmission.
2300 Partially implements ticket 13161.
2303 Changes in version 0.2.5.10 - 2014-10-24
2304 Tor 0.2.5.10 is the first stable release in the 0.2.5 series.
2306 It adds several new security features, including improved
2307 denial-of-service resistance for relays, new compiler hardening
2308 options, and a system-call sandbox for hardened installations on Linux
2309 (requires seccomp2). The controller protocol has several new features,
2310 resolving IPv6 addresses should work better than before, and relays
2311 should be a little more CPU-efficient. We've added support for more
2312 OpenBSD and FreeBSD transparent proxy types. We've improved the build
2313 system and testing infrastructure to allow unit testing of more parts
2314 of the Tor codebase. Finally, we've addressed several nagging pluggable
2315 transport usability issues, and included numerous other small bugfixes
2316 and features mentioned below.
2318 This release marks end-of-life for Tor 0.2.3.x; those Tor versions
2319 have accumulated many known flaws; everyone should upgrade.
2321 o Deprecated versions:
2322 - Tor 0.2.3.x has reached end-of-life; it has received no patches or
2323 attention for some while.
2326 Changes in version 0.2.5.9-rc - 2014-10-20
2327 Tor 0.2.5.9-rc is the third release candidate for the Tor 0.2.5.x
2328 series. It disables SSL3 in response to the recent "POODLE" attack
2329 (even though POODLE does not affect Tor). It also works around a crash
2330 bug caused by some operating systems' response to the "POODLE" attack
2331 (which does affect Tor). It also contains a few miscellaneous fixes.
2333 o Major security fixes:
2334 - Disable support for SSLv3. All versions of OpenSSL in use with Tor
2335 today support TLS 1.0 or later, so we can safely turn off support
2336 for this old (and insecure) protocol. Fixes bug 13426.
2338 o Major bugfixes (openssl bug workaround):
2339 - Avoid crashing when using OpenSSL version 0.9.8zc, 1.0.0o, or
2340 1.0.1j, built with the 'no-ssl3' configuration option. Fixes bug
2341 13471. This is a workaround for an OpenSSL bug.
2344 - Disable the sandbox name resolver cache when running tor-resolve:
2345 tor-resolve doesn't use the sandbox code, and turning it on was
2346 breaking attempts to do tor-resolve on a non-default server on
2347 Linux. Fixes bug 13295; bugfix on 0.2.5.3-alpha.
2349 o Compilation fixes:
2350 - Build and run correctly on systems like OpenBSD-current that have
2351 patched OpenSSL to remove get_cipher_by_char and/or its
2352 implementations. Fixes issue 13325.
2354 o Downgraded warnings:
2355 - Downgrade the severity of the 'unexpected sendme cell from client'
2356 from 'warn' to 'protocol warning'. Closes ticket 8093.
2359 Changes in version 0.2.4.25 - 2014-10-20
2360 Tor 0.2.4.25 disables SSL3 in response to the recent "POODLE" attack
2361 (even though POODLE does not affect Tor). It also works around a crash
2362 bug caused by some operating systems' response to the "POODLE" attack
2363 (which does affect Tor).
2365 o Major security fixes (also in 0.2.5.9-rc):
2366 - Disable support for SSLv3. All versions of OpenSSL in use with Tor
2367 today support TLS 1.0 or later, so we can safely turn off support
2368 for this old (and insecure) protocol. Fixes bug 13426.
2370 o Major bugfixes (openssl bug workaround, also in 0.2.5.9-rc):
2371 - Avoid crashing when using OpenSSL version 0.9.8zc, 1.0.0o, or
2372 1.0.1j, built with the 'no-ssl3' configuration option. Fixes bug
2373 13471. This is a workaround for an OpenSSL bug.
2376 Changes in version 0.2.5.8-rc - 2014-09-22
2377 Tor 0.2.5.8-rc is the second release candidate for the Tor 0.2.5.x
2378 series. It fixes a bug that affects consistency and speed when
2379 connecting to hidden services, and it updates the location of one of
2380 the directory authorities.
2383 - Clients now send the correct address for their chosen rendezvous
2384 point when trying to access a hidden service. They used to send
2385 the wrong address, which would still work some of the time because
2386 they also sent the identity digest of the rendezvous point, and if
2387 the hidden service happened to try connecting to the rendezvous
2388 point from a relay that already had a connection open to it,
2389 the relay would reuse that connection. Now connections to hidden
2390 services should be more robust and faster. Also, this bug meant
2391 that clients were leaking to the hidden service whether they were
2392 on a little-endian (common) or big-endian (rare) system, which for
2393 some users might have reduced their anonymity. Fixes bug 13151;
2394 bugfix on 0.2.1.5-alpha.
2396 o Directory authority changes:
2397 - Change IP address for gabelmoo (v3 directory authority).
2400 Changes in version 0.2.4.24 - 2014-09-22
2401 Tor 0.2.4.24 fixes a bug that affects consistency and speed when
2402 connecting to hidden services, and it updates the location of one of
2403 the directory authorities.
2406 - Clients now send the correct address for their chosen rendezvous
2407 point when trying to access a hidden service. They used to send
2408 the wrong address, which would still work some of the time because
2409 they also sent the identity digest of the rendezvous point, and if
2410 the hidden service happened to try connecting to the rendezvous
2411 point from a relay that already had a connection open to it,
2412 the relay would reuse that connection. Now connections to hidden
2413 services should be more robust and faster. Also, this bug meant
2414 that clients were leaking to the hidden service whether they were
2415 on a little-endian (common) or big-endian (rare) system, which for
2416 some users might have reduced their anonymity. Fixes bug 13151;
2417 bugfix on 0.2.1.5-alpha.
2419 o Directory authority changes:
2420 - Change IP address for gabelmoo (v3 directory authority).
2422 o Minor features (geoip):
2423 - Update geoip and geoip6 to the August 7 2014 Maxmind GeoLite2
2427 Changes in version 0.2.5.7-rc - 2014-09-11
2428 Tor 0.2.5.7-rc fixes several regressions from earlier in the 0.2.5.x
2429 release series, and some long-standing bugs related to ORPort reachability
2430 testing and failure to send CREATE cells. It is the first release
2431 candidate for the Tor 0.2.5.x series.
2433 o Major bugfixes (client, startup):
2434 - Start making circuits as soon as DisabledNetwork is turned off.
2435 When Tor started with DisabledNetwork set, it would correctly
2436 conclude that it shouldn't build circuits, but it would mistakenly
2437 cache this conclusion, and continue believing it even when
2438 DisableNetwork is set to 0. Fixes the bug introduced by the fix
2439 for bug 11200; bugfix on 0.2.5.4-alpha.
2440 - Resume expanding abbreviations for command-line options. The fix
2441 for bug 4647 accidentally removed our hack from bug 586 that
2442 rewrote HashedControlPassword to __HashedControlSessionPassword
2443 when it appears on the commandline (which allowed the user to set
2444 her own HashedControlPassword in the torrc file while the
2445 controller generates a fresh session password for each run). Fixes
2446 bug 12948; bugfix on 0.2.5.1-alpha.
2447 - Warn about attempts to run hidden services and relays in the same
2448 process: that's probably not a good idea. Closes ticket 12908.
2450 o Major bugfixes (relay):
2451 - Avoid queuing or sending destroy cells for circuit ID zero when we
2452 fail to send a CREATE cell. Fixes bug 12848; bugfix on 0.0.8pre1.
2453 Found and fixed by "cypherpunks".
2454 - Fix ORPort reachability detection on relays running behind a
2455 proxy, by correctly updating the "local" mark on the controlling
2456 channel when changing the address of an or_connection_t after the
2457 handshake. Fixes bug 12160; bugfix on 0.2.4.4-alpha.
2459 o Minor features (bridge):
2460 - Add an ExtORPortCookieAuthFileGroupReadable option to make the
2461 cookie file for the ExtORPort g+r by default.
2463 o Minor features (geoip):
2464 - Update geoip and geoip6 to the August 7 2014 Maxmind GeoLite2
2467 o Minor bugfixes (logging):
2468 - Reduce the log severity of the "Pluggable transport proxy does not
2469 provide any needed transports and will not be launched." message,
2470 since Tor Browser includes several ClientTransportPlugin lines in
2471 its torrc-defaults file, leading every Tor Browser user who looks
2472 at her logs to see these notices and wonder if they're dangerous.
2473 Resolves bug 13124; bugfix on 0.2.5.3-alpha.
2474 - Downgrade "Unexpected onionskin length after decryption" warning
2475 to a protocol-warn, since there's nothing relay operators can do
2476 about a client that sends them a malformed create cell. Resolves
2477 bug 12996; bugfix on 0.0.6rc1.
2478 - Log more specific warnings when we get an ESTABLISH_RENDEZVOUS
2479 cell on a cannibalized or non-OR circuit. Resolves ticket 12997.
2480 - When logging information about an EXTEND2 or EXTENDED2 cell, log
2481 their names correctly. Fixes part of bug 12700; bugfix
2483 - When logging information about a relay cell whose command we don't
2484 recognize, log its command as an integer. Fixes part of bug 12700;
2485 bugfix on 0.2.1.10-alpha.
2486 - Escape all strings from the directory connection before logging
2487 them. Fixes bug 13071; bugfix on 0.1.1.15. Patch from "teor".
2489 o Minor bugfixes (controller):
2490 - Restore the functionality of CookieAuthFileGroupReadable. Fixes
2491 bug 12864; bugfix on 0.2.5.1-alpha.
2492 - Actually send TRANSPORT_LAUNCHED and HS_DESC events to
2493 controllers. Fixes bug 13085; bugfix on 0.2.5.1-alpha. Patch
2496 o Minor bugfixes (compilation):
2497 - Fix compilation of test.h with MSVC. Patch from Gisle Vanem;
2498 bugfix on 0.2.5.5-alpha.
2499 - Make the nmake make files work again. Fixes bug 13081. Bugfix on
2500 0.2.5.1-alpha. Patch from "NewEraCracker".
2501 - In routerlist_assert_ok(), don't take the address of a
2502 routerinfo's cache_info member unless that routerinfo is non-NULL.
2503 Fixes bug 13096; bugfix on 0.1.1.9-alpha. Patch by "teor".
2504 - Fix a large number of false positive warnings from the clang
2505 analyzer static analysis tool. This should make real warnings
2506 easier for clang analyzer to find. Patch from "teor". Closes
2509 o Distribution (systemd):
2510 - Verify configuration file via ExecStartPre in the systemd unit
2511 file. Patch from intrigeri; resolves ticket 12730.
2512 - Explicitly disable RunAsDaemon in the systemd unit file. Our
2513 current systemd unit uses "Type = simple", so systemd does not
2514 expect tor to fork. If the user has "RunAsDaemon 1" in their
2515 torrc, then things won't work as expected. This is e.g. the case
2516 on Debian (and derivatives), since there we pass "--defaults-torrc
2517 /usr/share/tor/tor-service-defaults-torrc" (that contains
2518 "RunAsDaemon 1") by default. Patch by intrigeri; resolves
2522 - Adjust the URLs in the README to refer to the new locations of
2523 several documents on the website. Fixes bug 12830. Patch from
2525 - Document 'reject6' and 'accept6' ExitPolicy entries. Resolves
2529 Changes in version 0.2.5.6-alpha - 2014-07-28
2530 Tor 0.2.5.6-alpha brings us a big step closer to slowing down the
2531 risk from guard rotation, and fixes a variety of other issues to get
2532 us closer to a release candidate.
2534 o Major features (also in 0.2.4.23):
2535 - Make the number of entry guards configurable via a new
2536 NumEntryGuards consensus parameter, and the number of directory
2537 guards configurable via a new NumDirectoryGuards consensus
2538 parameter. Implements ticket 12688.
2540 o Major bugfixes (also in 0.2.4.23):
2541 - Fix a bug in the bounds-checking in the 32-bit curve25519-donna
2542 implementation that caused incorrect results on 32-bit
2543 implementations when certain malformed inputs were used along with
2544 a small class of private ntor keys. This bug does not currently
2545 appear to allow an attacker to learn private keys or impersonate a
2546 Tor server, but it could provide a means to distinguish 32-bit Tor
2547 implementations from 64-bit Tor implementations. Fixes bug 12694;
2548 bugfix on 0.2.4.8-alpha. Bug found by Robert Ransom; fix from
2552 - Perform circuit cleanup operations even when circuit
2553 construction operations are disabled (because the network is
2554 disabled, or because there isn't enough directory information).
2555 Previously, when we were not building predictive circuits, we
2556 were not closing expired circuits either. Fixes bug 8387; bugfix on
2557 0.1.1.11-alpha. This bug became visible in 0.2.4.10-alpha when we
2558 became more strict about when we have "enough directory information
2562 - Authorities now assign the Guard flag to the fastest 25% of the
2563 network (it used to be the fastest 50%). Also raise the consensus
2564 weight that guarantees the Guard flag from 250 to 2000. For the
2565 current network, this results in about 1100 guards, down from 2500.
2566 This step paves the way for moving the number of entry guards
2567 down to 1 (proposal 236) while still providing reasonable expected
2568 performance for most users. Implements ticket 12690.
2569 - Update geoip and geoip6 to the July 10 2014 Maxmind GeoLite2
2571 - Slightly enhance the diagnostic message for bug 12184.
2573 o Minor bugfixes (also in 0.2.4.23):
2574 - Warn and drop the circuit if we receive an inbound 'relay early'
2575 cell. Those used to be normal to receive on hidden service circuits
2576 due to bug 1038, but the buggy Tor versions are long gone from
2577 the network so we can afford to resume watching for them. Resolves
2578 the rest of bug 1038; bugfix on 0.2.1.19.
2579 - Correct a confusing error message when trying to extend a circuit
2580 via the control protocol but we don't know a descriptor or
2581 microdescriptor for one of the specified relays. Fixes bug 12718;
2582 bugfix on 0.2.3.1-alpha.
2585 - Fix compilation when building with bufferevents enabled. (This
2586 configuration is still not expected to work, however.)
2587 Fixes bugs 12438, 12474, 11578; bugfixes on 0.2.5.1-alpha and
2588 0.2.5.3-alpha. Patches from Anthony G. Basile and Sathyanarayanan
2590 - Compile correctly with builds and forks of OpenSSL (such as
2591 LibreSSL) that disable compression. Fixes bug 12602; bugfix on
2592 0.2.1.1-alpha. Patch from "dhill".
2595 Changes in version 0.2.4.23 - 2014-07-28
2596 Tor 0.2.4.23 brings us a big step closer to slowing down the risk from
2597 guard rotation, and also backports several important fixes from the
2598 Tor 0.2.5 alpha release series.
2601 - Clients now look at the "usecreatefast" consensus parameter to
2602 decide whether to use CREATE_FAST or CREATE cells for the first hop
2603 of their circuit. This approach can improve security on connections
2604 where Tor's circuit handshake is stronger than the available TLS
2605 connection security levels, but the tradeoff is more computational
2606 load on guard relays. Implements proposal 221. Resolves ticket 9386.
2607 - Make the number of entry guards configurable via a new
2608 NumEntryGuards consensus parameter, and the number of directory
2609 guards configurable via a new NumDirectoryGuards consensus
2610 parameter. Implements ticket 12688.
2613 - Fix a bug in the bounds-checking in the 32-bit curve25519-donna
2614 implementation that caused incorrect results on 32-bit
2615 implementations when certain malformed inputs were used along with
2616 a small class of private ntor keys. This bug does not currently
2617 appear to allow an attacker to learn private keys or impersonate a
2618 Tor server, but it could provide a means to distinguish 32-bit Tor
2619 implementations from 64-bit Tor implementations. Fixes bug 12694;
2620 bugfix on 0.2.4.8-alpha. Bug found by Robert Ransom; fix from
2624 - Warn and drop the circuit if we receive an inbound 'relay early'
2625 cell. Those used to be normal to receive on hidden service circuits
2626 due to bug 1038, but the buggy Tor versions are long gone from
2627 the network so we can afford to resume watching for them. Resolves
2628 the rest of bug 1038; bugfix on 0.2.1.19.
2629 - Correct a confusing error message when trying to extend a circuit
2630 via the control protocol but we don't know a descriptor or
2631 microdescriptor for one of the specified relays. Fixes bug 12718;
2632 bugfix on 0.2.3.1-alpha.
2633 - Avoid an illegal read from stack when initializing the TLS
2634 module using a version of OpenSSL without all of the ciphers
2635 used by the v2 link handshake. Fixes bug 12227; bugfix on
2636 0.2.4.8-alpha. Found by "starlight".
2639 - Update geoip and geoip6 to the July 10 2014 Maxmind GeoLite2
2643 Changes in version 0.2.5.5-alpha - 2014-06-18
2644 Tor 0.2.5.5-alpha fixes a wide variety of remaining issues in the Tor
2645 0.2.5.x release series, including a couple of DoS issues, some
2646 performance regressions, a large number of bugs affecting the Linux
2647 seccomp2 sandbox code, and various other bugfixes. It also adds
2648 diagnostic bugfixes for a few tricky issues that we're trying to
2651 o Major features (security, traffic analysis resistance):
2652 - Several major improvements to the algorithm used to decide when to
2653 close TLS connections. Previous versions of Tor closed connections
2654 at a fixed interval after the last time a non-padding cell was
2655 sent over the connection, regardless of the target of the
2656 connection. Now, we randomize the intervals by adding up to 50% of
2657 their base value, we measure the length of time since connection
2658 last had at least one circuit, and we allow connections to known
2659 ORs to remain open a little longer (15 minutes instead of 3
2660 minutes minimum). These changes should improve Tor's resistance
2661 against some kinds of traffic analysis, and lower some overhead
2662 from needlessly closed connections. Fixes ticket 6799.
2663 Incidentally fixes ticket 12023; bugfix on 0.2.5.1-alpha.
2665 o Major bugfixes (security, OOM, new since 0.2.5.4-alpha, also in 0.2.4.22):
2666 - Fix a memory leak that could occur if a microdescriptor parse
2667 fails during the tokenizing step. This bug could enable a memory
2668 exhaustion attack by directory servers. Fixes bug 11649; bugfix
2671 o Major bugfixes (security, directory authorities):
2672 - Directory authorities now include a digest of each relay's
2673 identity key as a part of its microdescriptor.
2675 This is a workaround for bug 11743 (reported by "cypherpunks"),
2676 where Tor clients do not support receiving multiple
2677 microdescriptors with the same SHA256 digest in the same
2678 consensus. When clients receive a consensus like this, they only
2679 use one of the relays. Without this fix, a hostile relay could
2680 selectively disable some client use of target relays by
2681 constructing a router descriptor with a different identity and the
2682 same microdescriptor parameters and getting the authorities to
2683 list it in a microdescriptor consensus. This fix prevents an
2684 attacker from causing a microdescriptor collision, because the
2685 router's identity is not forgeable.
2687 o Major bugfixes (relay):
2688 - Use a direct dirport connection when uploading non-anonymous
2689 descriptors to the directory authorities. Previously, relays would
2690 incorrectly use tunnel connections under a fairly wide variety of
2691 circumstances. Fixes bug 11469; bugfix on 0.2.4.3-alpha.
2692 - When a circuit accidentally has the same circuit ID for its
2693 forward and reverse direction, correctly detect the direction of
2694 cells using that circuit. Previously, this bug made roughly one
2695 circuit in a million non-functional. Fixes bug 12195; this is a
2696 bugfix on every version of Tor.
2698 o Major bugfixes (client, pluggable transports):
2699 - When managing pluggable transports, use OS notification facilities
2700 to learn if they have crashed, and don't attempt to kill any
2701 process that has already exited. Fixes bug 8746; bugfix
2704 o Minor features (diagnostic):
2705 - When logging a warning because of bug 7164, additionally check the
2706 hash table for consistency (as proposed on ticket 11737). This may
2707 help diagnose bug 7164.
2708 - When we log a heartbeat, log how many one-hop circuits we have
2709 that are at least 30 minutes old, and log status information about
2710 a few of them. This is an attempt to track down bug 8387.
2711 - When encountering an unexpected CR while writing text to a file on
2712 Windows, log the name of the file. Should help diagnosing
2714 - Give more specific warnings when a client notices that an onion
2715 handshake has failed. Fixes ticket 9635.
2716 - Add significant new logging code to attempt to diagnose bug 12184,
2717 where relays seem to run out of available circuit IDs.
2718 - Improve the diagnostic log message for bug 8387 even further to
2719 try to improve our odds of figuring out why one-hop directory
2720 circuits sometimes do not get closed.
2722 o Minor features (security, memory management):
2723 - Memory allocation tricks (mempools and buffer freelists) are now
2724 disabled by default. You can turn them back on with
2725 --enable-mempools and --enable-buf-freelists respectively. We're
2726 disabling these features because malloc performance is good enough
2727 on most platforms, and a similar feature in OpenSSL exacerbated
2728 exploitation of the Heartbleed attack. Resolves ticket 11476.
2730 o Minor features (security):
2731 - Apply the secure SipHash-2-4 function to the hash table mapping
2732 circuit IDs and channels to circuits. We missed this one when we
2733 were converting all the other hash functions to use SipHash back
2734 in 0.2.5.3-alpha. Resolves ticket 11750.
2736 o Minor features (build):
2737 - The configure script has a --disable-seccomp option to turn off
2738 support for libseccomp on systems that have it, in case it (or
2739 Tor's use of it) is broken. Resolves ticket 11628.
2741 o Minor features (other):
2742 - Update geoip and geoip6 to the June 4 2014 Maxmind GeoLite2
2745 o Minor bugfixes (security, new since 0.2.5.4-alpha, also in 0.2.4.22):
2746 - When running a hidden service, do not allow TunneledDirConns 0;
2747 this will keep the hidden service from running, and also
2748 make it publish its descriptors directly over HTTP. Fixes bug 10849;
2749 bugfix on 0.2.1.1-alpha.
2751 o Minor bugfixes (performance):
2752 - Avoid a bug where every successful connection made us recompute
2753 the flag telling us whether we have sufficient information to
2754 build circuits. Previously, we would forget our cached value
2755 whenever we successfully opened a channel (or marked a router as
2756 running or not running for any other reason), regardless of
2757 whether we had previously believed the router to be running. This
2758 forced us to run an expensive update operation far too often.
2759 Fixes bug 12170; bugfix on 0.1.2.1-alpha.
2760 - Avoid using tor_memeq() for checking relay cell integrity. This
2761 removes a possible performance bottleneck. Fixes part of bug
2762 12169; bugfix on 0.2.1.31.
2764 o Minor bugfixes (compilation):
2765 - Fix compilation of test_status.c when building with MVSC. Bugfix
2766 on 0.2.5.4-alpha. Patch from Gisle Vanem.
2767 - Resolve GCC complaints on OpenBSD about discarding constness in
2768 TO_{ORIGIN,OR}_CIRCUIT functions. Fixes part of bug 11633; bugfix
2769 on 0.1.1.23. Patch from Dana Koch.
2770 - Resolve clang complaints on OpenBSD with -Wshorten-64-to-32 due to
2771 treatment of long and time_t as comparable types. Fixes part of
2772 bug 11633. Patch from Dana Koch.
2773 - Make Tor compile correctly with --disable-buf-freelists. Fixes bug
2774 11623; bugfix on 0.2.5.3-alpha.
2775 - When deciding whether to build the 64-bit curve25519
2776 implementation, detect platforms where we can compile 128-bit
2777 arithmetic but cannot link it. Fixes bug 11729; bugfix on
2778 0.2.4.8-alpha. Patch from "conradev".
2779 - Fix compilation when DNS_CACHE_DEBUG is enabled. Fixes bug 11761;
2780 bugfix on 0.2.3.13-alpha. Found by "cypherpunks".
2781 - Fix compilation with dmalloc. Fixes bug 11605; bugfix
2784 o Minor bugfixes (Directory server):
2785 - When sending a compressed set of descriptors or microdescriptors,
2786 make sure to finalize the zlib stream. Previously, we would write
2787 all the compressed data, but if the last descriptor we wanted to
2788 send was missing or too old, we would not mark the stream as
2789 finished. This caused problems for decompression tools. Fixes bug
2790 11648; bugfix on 0.1.1.23.
2792 o Minor bugfixes (Linux seccomp sandbox):
2793 - Make the seccomp sandbox code compile under ARM Linux. Fixes bug
2794 11622; bugfix on 0.2.5.1-alpha.
2795 - Avoid crashing when re-opening listener ports with the seccomp
2796 sandbox active. Fixes bug 12115; bugfix on 0.2.5.1-alpha.
2797 - Avoid crashing with the seccomp sandbox enabled along with
2798 ConstrainedSockets. Fixes bug 12139; bugfix on 0.2.5.1-alpha.
2799 - When we receive a SIGHUP with the sandbox enabled, correctly
2800 support rotating our log files. Fixes bug 12032; bugfix
2802 - Avoid crash when running with sandboxing enabled and
2803 DirReqStatistics not disabled. Fixes bug 12035; bugfix
2805 - Fix a "BUG" warning when trying to write bridge-stats files with
2806 the Linux syscall sandbox filter enabled. Fixes bug 12041; bugfix
2808 - Prevent the sandbox from crashing on startup when run with the
2809 --enable-expensive-hardening configuration option. Fixes bug
2810 11477; bugfix on 0.2.5.4-alpha.
2811 - When running with DirPortFrontPage and sandboxing both enabled,
2812 reload the DirPortFrontPage correctly when restarting. Fixes bug
2813 12028; bugfix on 0.2.5.1-alpha.
2814 - Don't try to enable the sandbox when using the Tor binary to check
2815 its configuration, hash a passphrase, or so on. Doing so was
2816 crashing on startup for some users. Fixes bug 11609; bugfix
2818 - Avoid warnings when running with sandboxing and node statistics
2819 enabled at the same time. Fixes part of 12064; bugfix on
2820 0.2.5.1-alpha. Patch from Michael Wolf.
2821 - Avoid warnings when running with sandboxing enabled at the same
2822 time as cookie authentication, hidden services, or directory
2823 authority voting. Fixes part of 12064; bugfix on 0.2.5.1-alpha.
2824 - Do not allow options that require calls to exec to be enabled
2825 alongside the seccomp2 sandbox: they will inevitably crash. Fixes
2826 bug 12043; bugfix on 0.2.5.1-alpha.
2827 - Handle failures in getpwnam()/getpwuid() when running with the
2828 User option set and the Linux syscall sandbox enabled. Fixes bug
2829 11946; bugfix on 0.2.5.1-alpha.
2830 - Refactor the getaddrinfo workaround that the seccomp sandbox uses
2831 to avoid calling getaddrinfo() after installing the sandbox
2832 filters. Previously, it preloaded a cache with the IPv4 address
2833 for our hostname, and nothing else. Now, it loads the cache with
2834 every address that it used to initialize the Tor process. Fixes
2835 bug 11970; bugfix on 0.2.5.1-alpha.
2837 o Minor bugfixes (pluggable transports):
2838 - Enable the ExtORPortCookieAuthFile option, to allow changing the
2839 default location of the authentication token for the extended OR
2840 Port as used by sever-side pluggable transports. We had
2841 implemented this option before, but the code to make it settable
2842 had been omitted. Fixes bug 11635; bugfix on 0.2.5.1-alpha.
2843 - Avoid another 60-second delay when starting Tor in a pluggable-
2844 transport-using configuration when we already have cached
2845 descriptors for our bridges. Fixes bug 11965; bugfix
2848 o Minor bugfixes (client):
2849 - Avoid "Tried to open a socket with DisableNetwork set" warnings
2850 when starting a client with bridges configured and DisableNetwork
2851 set. (Tor launcher starts Tor with DisableNetwork set the first
2852 time it runs.) Fixes bug 10405; bugfix on 0.2.3.9-alpha.
2854 o Minor bugfixes (testing):
2855 - The Python parts of the test scripts now work on Python 3 as well
2856 as Python 2, so systems where '/usr/bin/python' is Python 3 will
2857 no longer have the tests break. Fixes bug 11608; bugfix
2859 - When looking for versions of python that we could run the tests
2860 with, check for "python2.7" and "python3.3"; previously we were
2861 only looking for "python", "python2", and "python3". Patch from
2862 Dana Koch. Fixes bug 11632; bugfix on 0.2.5.2-alpha.
2863 - Fix all valgrind warnings produced by the unit tests. There were
2864 over a thousand memory leak warnings previously, mostly produced
2865 by forgetting to free things in the unit test code. Fixes bug
2866 11618, bugfixes on many versions of Tor.
2868 o Minor bugfixes (tor-fw-helper):
2869 - Give a correct log message when tor-fw-helper fails to launch.
2870 (Previously, we would say something like "tor-fw-helper sent us a
2871 string we could not parse".) Fixes bug 9781; bugfix
2874 o Minor bugfixes (relay, threading):
2875 - Check return code on spawn_func() in cpuworker code, so that we
2876 don't think we've spawned a nonworking cpuworker and write junk to
2877 it forever. Fix related to bug 4345; bugfix on all released Tor
2878 versions. Found by "skruffy".
2879 - Use a pthread_attr to make sure that spawn_func() cannot return an
2880 error while at the same time launching a thread. Fix related to
2881 bug 4345; bugfix on all released Tor versions. Reported
2884 o Minor bugfixes (relay, oom prevention):
2885 - Correctly detect the total available system memory. We tried to do
2886 this in 0.2.5.4-alpha, but the code was set up to always return an
2887 error value, even on success. Fixes bug 11805; bugfix
2890 o Minor bugfixes (relay, other):
2891 - We now drop CREATE cells for already-existent circuit IDs and for
2892 zero-valued circuit IDs, regardless of other factors that might
2893 otherwise have called for DESTROY cells. Fixes bug 12191; bugfix
2895 - Avoid an illegal read from stack when initializing the TLS module
2896 using a version of OpenSSL without all of the ciphers used by the
2897 v2 link handshake. Fixes bug 12227; bugfix on 0.2.4.8-alpha. Found
2899 - When rejecting DATA cells for stream_id zero, still count them
2900 against the circuit's deliver window so that we don't fail to send
2901 a SENDME. Fixes bug 11246; bugfix on 0.2.4.10-alpha.
2903 o Minor bugfixes (logging):
2904 - Fix a misformatted log message about delayed directory fetches.
2905 Fixes bug 11654; bugfix on 0.2.5.3-alpha.
2906 - Squelch a spurious LD_BUG message "No origin circuit for
2907 successful SOCKS stream" in certain hidden service failure cases;
2911 - Include a tor.service file in contrib/dist for use with systemd.
2912 Some distributions will be able to use this file unmodified;
2913 others will need to tweak it, or write their own. Patch from Jamie
2914 Nguyen; resolves ticket 8368.
2917 - Clean up several option names in the manpage to match their real
2918 names, add the missing documentation for a couple of testing and
2919 directory authority options, remove the documentation for a
2920 V2-directory fetching option that no longer exists. Resolves
2922 - Correct the documenation so that it lists the correct directory
2923 for the stats files. (They are in a subdirectory called "stats",
2925 - In the manpage, move more authority-only options into the
2926 directory authority section so that operators of regular directory
2927 caches don't get confused.
2930 - The contrib directory has been sorted and tidied. Before, it was
2931 an unsorted dumping ground for useful and not-so-useful things.
2932 Now, it is divided based on functionality, and the items which
2933 seemed to be nonfunctional or useless have been removed. Resolves
2934 ticket 8966; based on patches from "rl1987".
2937 - Remove /tor/dbg-stability.txt URL that was meant to help debug WFU
2938 and MTBF calculations, but that nobody was using. Fixes ticket 11742.
2939 - The TunnelDirConns and PreferTunnelledDirConns options no longer
2940 exist; tunneled directory connections have been available since
2941 0.1.2.5-alpha, and turning them off is not a good idea. This is a
2942 brute-force fix for 10849, where "TunnelDirConns 0" would break
2946 Changes in version 0.2.4.22 - 2014-05-16
2947 Tor 0.2.4.22 backports numerous high-priority fixes from the Tor 0.2.5
2948 alpha release series. These include blocking all authority signing
2949 keys that may have been affected by the OpenSSL "heartbleed" bug,
2950 choosing a far more secure set of TLS ciphersuites by default, closing
2951 a couple of memory leaks that could be used to run a target relay out
2952 of RAM, and several others.
2954 o Major features (security, backport from 0.2.5.4-alpha):
2955 - Block authority signing keys that were used on authorities
2956 vulnerable to the "heartbleed" bug in OpenSSL (CVE-2014-0160). (We
2957 don't have any evidence that these keys _were_ compromised; we're
2958 doing this to be prudent.) Resolves ticket 11464.
2960 o Major bugfixes (security, OOM):
2961 - Fix a memory leak that could occur if a microdescriptor parse
2962 fails during the tokenizing step. This bug could enable a memory
2963 exhaustion attack by directory servers. Fixes bug 11649; bugfix
2966 o Major bugfixes (TLS cipher selection, backport from 0.2.5.4-alpha):
2967 - The relay ciphersuite list is now generated automatically based on
2968 uniform criteria, and includes all OpenSSL ciphersuites with
2969 acceptable strength and forward secrecy. Previously, we had left
2970 some perfectly fine ciphersuites unsupported due to omission or
2971 typo. Resolves bugs 11513, 11492, 11498, 11499. Bugs reported by
2972 'cypherpunks'. Bugfix on 0.2.4.8-alpha.
2973 - Relays now trust themselves to have a better view than clients of
2974 which TLS ciphersuites are better than others. (Thanks to bug
2975 11513, the relay list is now well-considered, whereas the client
2976 list has been chosen mainly for anti-fingerprinting purposes.)
2977 Relays prefer: AES over 3DES; then ECDHE over DHE; then GCM over
2978 CBC; then SHA384 over SHA256 over SHA1; and last, AES256 over
2979 AES128. Resolves ticket 11528.
2980 - Clients now try to advertise the same list of ciphersuites as
2981 Firefox 28. This change enables selection of (fast) GCM
2982 ciphersuites, disables some strange old ciphers, and stops
2983 advertising the ECDH (not to be confused with ECDHE) ciphersuites.
2984 Resolves ticket 11438.
2986 o Minor bugfixes (configuration, security):
2987 - When running a hidden service, do not allow TunneledDirConns 0:
2988 trying to set that option together with a hidden service would
2989 otherwise prevent the hidden service from running, and also make
2990 it publish its descriptors directly over HTTP. Fixes bug 10849;
2991 bugfix on 0.2.1.1-alpha.
2993 o Minor bugfixes (controller, backport from 0.2.5.4-alpha):
2994 - Avoid sending a garbage value to the controller when a circuit is
2995 cannibalized. Fixes bug 11519; bugfix on 0.2.3.11-alpha.
2997 o Minor bugfixes (exit relay, backport from 0.2.5.4-alpha):
2998 - Stop leaking memory when we successfully resolve a PTR record.
2999 Fixes bug 11437; bugfix on 0.2.4.7-alpha.
3001 o Minor bugfixes (bridge client, backport from 0.2.5.4-alpha):
3002 - Avoid 60-second delays in the bootstrapping process when Tor is
3003 launching for a second time while using bridges. Fixes bug 9229;
3004 bugfix on 0.2.0.3-alpha.
3006 o Minor bugfixes (relays and bridges, backport from 0.2.5.4-alpha):
3007 - Give the correct URL in the warning message when trying to run a
3008 relay on an ancient version of Windows. Fixes bug 9393.
3010 o Minor bugfixes (compilation):
3011 - Fix a compilation error when compiling with --disable-curve25519.
3012 Fixes bug 9700; bugfix on 0.2.4.17-rc.
3015 - Downgrade the warning severity for the the "md was still
3016 referenced 1 node(s)" warning. Tor 0.2.5.4-alpha has better code
3017 for trying to diagnose this bug, and the current warning in
3018 earlier versions of tor achieves nothing useful. Addresses warning
3021 o Minor features (log verbosity, backport from 0.2.5.4-alpha):
3022 - When we run out of usable circuit IDs on a channel, log only one
3023 warning for the whole channel, and describe how many circuits
3024 there were on the channel. Fixes part of ticket 11553.
3026 o Minor features (security, backport from 0.2.5.4-alpha):
3027 - Decrease the lower limit of MaxMemInCellQueues to 256 MBytes (but
3028 leave the default at 8GBytes), to better support Raspberry Pi
3029 users. Fixes bug 9686; bugfix on 0.2.4.14-alpha.
3031 o Documentation (backport from 0.2.5.4-alpha):
3032 - Correctly document that we search for a system torrc file before
3033 looking in ~/.torrc. Fixes documentation side of 9213; bugfix on
3037 Changes in version 0.2.5.4-alpha - 2014-04-25
3038 Tor 0.2.5.4-alpha includes several security and performance
3039 improvements for clients and relays, including blacklisting authority
3040 signing keys that were used while susceptible to the OpenSSL
3041 "heartbleed" bug, fixing two expensive functions on busy relays,
3042 improved TLS ciphersuite preference lists, support for run-time
3043 hardening on compilers that support AddressSanitizer, and more work on
3044 the Linux sandbox code.
3046 There are also several usability fixes for clients (especially clients
3047 that use bridges), two new TransPort protocols supported (one on
3048 OpenBSD, one on FreeBSD), and various other bugfixes.
3050 This release marks end-of-life for Tor 0.2.2.x; those Tor versions
3051 have accumulated many known flaws; everyone should upgrade.
3053 o Major features (security):
3054 - If you don't specify MaxMemInQueues yourself, Tor now tries to
3055 pick a good value based on your total system memory. Previously,
3056 the default was always 8 GB. You can still override the default by
3057 setting MaxMemInQueues yourself. Resolves ticket 11396.
3058 - Block authority signing keys that were used on authorities
3059 vulnerable to the "heartbleed" bug in OpenSSL (CVE-2014-0160). (We
3060 don't have any evidence that these keys _were_ compromised; we're
3061 doing this to be prudent.) Resolves ticket 11464.
3063 o Major features (relay performance):
3064 - Speed up server-side lookups of rendezvous and introduction point
3065 circuits by using hashtables instead of linear searches. These
3066 functions previously accounted between 3 and 7% of CPU usage on
3067 some busy relays. Resolves ticket 9841.
3068 - Avoid wasting CPU when extending a circuit over a channel that is
3069 nearly out of circuit IDs. Previously, we would do a linear scan
3070 over possible circuit IDs before finding one or deciding that we
3071 had exhausted our possibilities. Now, we try at most 64 random
3072 circuit IDs before deciding that we probably won't succeed. Fixes
3073 a possible root cause of ticket 11553.
3075 o Major features (seccomp2 sandbox, Linux only):
3076 - The seccomp2 sandbox can now run a test network for multiple hours
3077 without crashing. The sandbox is still experimental, and more bugs
3078 will probably turn up. To try it, enable "Sandbox 1" on a Linux
3079 host. Resolves ticket 11351.
3080 - Strengthen sandbox code: the sandbox can now test the arguments
3081 for rename(), and blocks _sysctl() entirely. Resolves another part
3083 - When the sandbox blocks a system call, it now tries to log a stack
3084 trace before exiting. Resolves ticket 11465.
3086 o Major bugfixes (TLS cipher selection):
3087 - The relay ciphersuite list is now generated automatically based on
3088 uniform criteria, and includes all OpenSSL ciphersuites with
3089 acceptable strength and forward secrecy. Previously, we had left
3090 some perfectly fine ciphersuites unsupported due to omission or
3091 typo. Resolves bugs 11513, 11492, 11498, 11499. Bugs reported by
3092 'cypherpunks'. Bugfix on 0.2.4.8-alpha.
3093 - Relays now trust themselves to have a better view than clients of
3094 which TLS ciphersuites are better than others. (Thanks to bug
3095 11513, the relay list is now well-considered, whereas the client
3096 list has been chosen mainly for anti-fingerprinting purposes.)
3097 Relays prefer: AES over 3DES; then ECDHE over DHE; then GCM over
3098 CBC; then SHA384 over SHA256 over SHA1; and last, AES256 over
3099 AES128. Resolves ticket 11528.
3100 - Clients now try to advertise the same list of ciphersuites as
3101 Firefox 28. This change enables selection of (fast) GCM
3102 ciphersuites, disables some strange old ciphers, and stops
3103 advertising the ECDH (not to be confused with ECDHE) ciphersuites.
3104 Resolves ticket 11438.
3106 o Major bugfixes (bridge client):
3107 - Avoid 60-second delays in the bootstrapping process when Tor is
3108 launching for a second time while using bridges. Fixes bug 9229;
3109 bugfix on 0.2.0.3-alpha.
3111 o Minor features (transparent proxy, *BSD):
3112 - Support FreeBSD's ipfw firewall interface for TransPort ports on
3113 FreeBSD. To enable it, set "TransProxyType ipfw". Resolves ticket
3114 10267; patch from "yurivict".
3115 - Support OpenBSD's divert-to rules with the pf firewall for
3116 transparent proxy ports. To enable it, set "TransProxyType
3117 pf-divert". This allows Tor to run a TransPort transparent proxy
3118 port on OpenBSD 4.4 or later without root privileges. See the
3119 pf.conf(5) manual page for information on configuring pf to use
3120 divert-to rules. Closes ticket 10896; patch from Dana Koch.
3122 o Minor features (security):
3123 - New --enable-expensive-hardening option to enable security
3124 hardening options that consume nontrivial amounts of CPU and
3125 memory. Right now, this includes AddressSanitizer and UbSan, which
3126 are supported in newer versions of GCC and Clang. Closes ticket
3129 o Minor features (log verbosity):
3130 - Demote the message that we give when a flushing connection times
3131 out for too long from NOTICE to INFO. It was usually meaningless.
3132 Resolves ticket 5286.
3133 - Don't log so many notice-level bootstrapping messages at startup
3134 about downloading descriptors. Previously, we'd log a notice
3135 whenever we learned about more routers. Now, we only log a notice
3136 at every 5% of progress. Fixes bug 9963.
3137 - Warn less verbosely when receiving a malformed
3138 ESTABLISH_RENDEZVOUS cell. Fixes ticket 11279.
3139 - When we run out of usable circuit IDs on a channel, log only one
3140 warning for the whole channel, and describe how many circuits
3141 there were on the channel. Fixes part of ticket 11553.
3143 o Minor features (relay):
3144 - If a circuit timed out for at least 3 minutes, check if we have a
3145 new external IP address, and publish a new descriptor with the new
3146 IP address if it changed. Resolves ticket 2454.
3148 o Minor features (controller):
3149 - Make the entire exit policy available from the control port via
3150 GETINFO exit-policy/*. Implements enhancement 7952. Patch from
3152 - Because of the fix for ticket 11396, the real limit for memory
3153 usage may no longer match the configured MaxMemInQueues value. The
3154 real limit is now exposed via GETINFO limits/max-mem-in-queues.
3156 o Minor features (bridge client):
3157 - Report a more useful failure message when we can't connect to a
3158 bridge because we don't have the right pluggable transport
3159 configured. Resolves ticket 9665. Patch from Fábio J. Bertinatto.
3161 o Minor features (diagnostic):
3162 - Add more log messages to diagnose bug 7164, which causes
3163 intermittent "microdesc_free() called but md was still referenced"
3164 warnings. We now include more information, to figure out why we
3165 might be cleaning a microdescriptor for being too old if it's
3166 still referenced by a live node_t object.
3168 o Minor bugfixes (client, DNSPort):
3169 - When using DNSPort, try to respond to AAAA requests with AAAA
3170 answers. Previously, we hadn't looked at the request type when
3171 deciding which answer type to prefer. Fixes bug 10468; bugfix on
3173 - When receiving a DNS query for an unsupported record type, reply
3174 with no answer rather than with a NOTIMPL error. This behavior
3175 isn't correct either, but it will break fewer client programs, we
3176 hope. Fixes bug 10268; bugfix on 0.2.0.1-alpha. Original patch
3179 o Minor bugfixes (exit relay):
3180 - Stop leaking memory when we successfully resolve a PTR record.
3181 Fixes bug 11437; bugfix on 0.2.4.7-alpha.
3183 o Minor bugfixes (bridge client):
3184 - Stop accepting bridge lines containing hostnames. Doing so would
3185 cause clients to perform DNS requests on the hostnames, which was
3186 not sensible behavior. Fixes bug 10801; bugfix on 0.2.0.1-alpha.
3187 - Avoid a 60-second delay in the bootstrapping process when a Tor
3188 client with pluggable transports re-reads its configuration at
3189 just the wrong time. Re-fixes bug 11156; bugfix on 0.2.5.3-alpha.
3191 o Minor bugfixes (client, logging during bootstrap):
3192 - Warn only once if we start logging in an unsafe way. Previously,
3193 we complain as many times as we had problems. Fixes bug 9870;
3194 bugfix on 0.2.5.1-alpha.
3195 - Only report the first fatal bootstrap error on a given OR
3196 connection. This stops us from telling the controller bogus error
3197 messages like "DONE". Fixes bug 10431; bugfix on 0.2.1.1-alpha.
3198 - Be more helpful when trying to run sandboxed on Linux without
3199 libseccomp. Instead of saying "Sandbox is not implemented on this
3200 platform", we now explain that we need to be built with
3201 libseccomp. Fixes bug 11543; bugfix on 0.2.5.1-alpha.
3202 - Avoid generating spurious warnings when starting with
3203 DisableNetwork enabled. Fixes bug 11200 and bug 10405; bugfix on
3206 o Minor bugfixes (closing OR connections):
3207 - If write_to_buf() in connection_write_to_buf_impl_() ever fails,
3208 check if it's an or_connection_t and correctly call
3209 connection_or_close_for_error() rather than
3210 connection_mark_for_close() directly. Fixes bug 11304; bugfix on
3212 - When closing all connections on setting DisableNetwork to 1, use
3213 connection_or_close_normally() rather than closing OR connections
3214 out from under the channel layer. Fixes bug 11306; bugfix on
3217 o Minor bugfixes (controller):
3218 - Avoid sending a garbage value to the controller when a circuit is
3219 cannibalized. Fixes bug 11519; bugfix on 0.2.3.11-alpha.
3221 o Minor bugfixes (tor-fw-helper):
3222 - Allow tor-fw-helper to build again by adding src/ext to its
3223 CPPFLAGS. Fixes bug 11296; bugfix on 0.2.5.3-alpha.
3225 o Minor bugfixes (bridges):
3226 - Avoid potential crashes or bad behavior when launching a
3227 server-side managed proxy with ORPort or ExtORPort temporarily
3228 disabled. Fixes bug 9650; bugfix on 0.2.3.16-alpha.
3230 o Minor bugfixes (platform-specific):
3231 - Fix compilation on Solaris, which does not have <endian.h>. Fixes
3232 bug 11426; bugfix on 0.2.5.3-alpha.
3233 - When dumping a malformed directory object to disk, save it in
3234 binary mode on Windows, not text mode. Fixes bug 11342; bugfix on
3236 - Don't report failures from make_socket_reuseable() on incoming
3237 sockets on OSX: this can happen when incoming connections close
3238 early. Fixes bug 10081.
3240 o Minor bugfixes (trivial memory leaks):
3241 - Fix a small memory leak when signing a directory object. Fixes bug
3242 11275; bugfix on 0.2.4.13-alpha.
3243 - Free placeholder entries in our circuit table at exit; fixes a
3244 harmless memory leak. Fixes bug 11278; bugfix on 0.2.5.1-alpha.
3245 - Don't re-initialize a second set of OpenSSL mutexes when starting
3246 up. Previously, we'd make one set of mutexes, and then immediately
3247 replace them with another. Fixes bug 11726; bugfix on
3249 - Resolve some memory leaks found by coverity in the unit tests, on
3250 exit in tor-gencert, and on a failure to compute digests for our
3251 own keys when generating a v3 networkstatus vote. These leaks
3252 should never have affected anyone in practice.
3254 o Minor bugfixes (hidden service):
3255 - Only retry attempts to connect to a chosen rendezvous point 8
3256 times, not 30. Fixes bug 4241; bugfix on 0.1.0.1-rc.
3258 o Minor bugfixes (misc code correctness):
3259 - Fix various instances of undefined behavior in channeltls.c,
3260 tor_memmem(), and eventdns.c that would cause us to construct
3261 pointers to memory outside an allocated object. (These invalid
3262 pointers were not accessed, but C does not even allow them to
3263 exist.) Fixes bug 10363; bugfixes on 0.1.1.1-alpha, 0.1.2.1-alpha,
3264 0.2.0.10-alpha, and 0.2.3.6-alpha. Reported by "bobnomnom".
3265 - Use the AddressSanitizer and Ubsan sanitizers (in clang-3.4) to
3266 fix some miscellaneous errors in our tests and codebase. Fixes bug
3267 11232. Bugfixes on versions back as far as 0.2.1.11-alpha.
3268 - Always check return values for unlink, munmap, UnmapViewOfFile;
3269 check strftime return values more often. In some cases all we can
3270 do is report a warning, but this may help prevent deeper bugs from
3271 going unnoticed. Closes ticket 8787; bugfixes on many, many tor
3273 - Fix numerous warnings from the clang "scan-build" static analyzer.
3274 Some of these are programming style issues; some of them are false
3275 positives that indicated awkward code; some are undefined behavior
3276 cases related to constructing (but not using) invalid pointers;
3277 some are assumptions about API behavior; some are (harmlessly)
3278 logging sizeof(ptr) bytes from a token when sizeof(*ptr) would be
3279 correct; and one or two are genuine bugs that weren't reachable
3280 from the rest of the program. Fixes bug 8793; bugfixes on many,
3284 - Build the torify.1 manpage again. Previously, we were only trying
3285 to build it when also building tor-fw-helper. That's why we didn't
3286 notice that we'd broken the ability to build it. Fixes bug 11321;
3287 bugfix on 0.2.5.1-alpha.
3288 - Fix the layout of the SOCKSPort flags in the manpage. Fixes bug
3289 11061; bugfix on 0.2.4.7-alpha.
3290 - Correctly document that we search for a system torrc file before
3291 looking in ~/.torrc. Fixes documentation side of 9213; bugfix on
3293 - Resolve warnings from Doxygen.
3295 o Code simplifications and refactoring:
3296 - Remove is_internal_IP() function. Resolves ticket 4645.
3297 - Remove unused function circuit_dump_by_chan from circuitlist.c.
3298 Closes issue 9107; patch from "marek".
3299 - Change our use of the ENUM_BF macro to avoid declarations that
3302 o Deprecated versions:
3303 - Tor 0.2.2.x has reached end-of-life; it has received no patches or
3304 attention for some while. Directory authorities no longer accept
3305 descriptors from relays running any version of Tor prior to Tor
3306 0.2.3.16-alpha. Resolves ticket 11149.
3309 - New macros in test.h to simplify writing mock-functions for unit
3310 tests. Part of ticket 11507. Patch from Dana Koch.
3311 - Complete tests for the status.c module. Resolves ticket 11507.
3312 Patch from Dana Koch.
3315 - Remove all code for the long unused v1 directory protocol.
3316 Resolves ticket 11070.
3319 Changes in version 0.2.5.3-alpha - 2014-03-22
3320 Tor 0.2.5.3-alpha includes all the fixes from 0.2.4.21. It contains
3321 two new anti-DoS features for Tor relays, resolves a bug that kept
3322 SOCKS5 support for IPv6 from working, fixes several annoying usability
3323 issues for bridge users, and removes more old code for unused
3326 The Tor 0.2.5.x release series is now in patch-freeze: no feature
3327 patches not already written will be considered for inclusion in 0.2.5.x.
3329 o Major features (relay security, DoS-resistance):
3330 - When deciding whether we have run out of memory and we need to
3331 close circuits, also consider memory allocated in buffers for
3332 streams attached to each circuit.
3334 This change, which extends an anti-DoS feature introduced in
3335 0.2.4.13-alpha and improved in 0.2.4.14-alpha, lets Tor exit relays
3336 better resist more memory-based DoS attacks than before. Since the
3337 MaxMemInCellQueues option now applies to all queues, it is renamed
3338 to MaxMemInQueues. This feature fixes bug 10169.
3339 - Avoid hash-flooding denial-of-service attacks by using the secure
3340 SipHash-2-4 hash function for our hashtables. Without this
3341 feature, an attacker could degrade performance of a targeted
3342 client or server by flooding their data structures with a large
3343 number of entries to be stored at the same hash table position,
3344 thereby slowing down the Tor instance. With this feature, hash
3345 table positions are derived from a randomized cryptographic key,
3346 and an attacker cannot predict which entries will collide. Closes
3348 - Decrease the lower limit of MaxMemInQueues to 256 MBytes (but leave
3349 the default at 8GBytes), to better support Raspberry Pi users. Fixes
3350 bug 9686; bugfix on 0.2.4.14-alpha.
3352 o Minor features (bridges, pluggable transports):
3353 - Bridges now write the SHA1 digest of their identity key
3354 fingerprint (that is, a hash of a hash of their public key) to
3355 notice-level logs, and to a new hashed-fingerprint file. This
3356 information will help bridge operators look up their bridge in
3357 Globe and similar tools. Resolves ticket 10884.
3358 - Improve the message that Tor displays when running as a bridge
3359 using pluggable transports without an Extended ORPort listener.
3360 Also, log the message in the log file too. Resolves ticket 11043.
3362 o Minor features (other):
3363 - Add a new option, PredictedPortsRelevanceTime, to control how long
3364 after having received a request to connect to a given port Tor
3365 will try to keep circuits ready in anticipation of future requests
3366 for that port. Patch from "unixninja92"; implements ticket 9176.
3367 - Generate a warning if any ports are listed in the SocksPolicy,
3368 DirPolicy, AuthDirReject, AuthDirInvalid, AuthDirBadDir, or
3369 AuthDirBadExit options. (These options only support address
3370 ranges.) Fixes part of ticket 11108.
3371 - Update geoip and geoip6 to the February 7 2014 Maxmind GeoLite2
3374 o Minor bugfixes (new since 0.2.5.2-alpha, also in 0.2.4.21):
3375 - Build without warnings under clang 3.4. (We have some macros that
3376 define static functions only some of which will get used later in
3377 the module. Starting with clang 3.4, these give a warning unless the
3378 unused attribute is set on them.) Resolves ticket 10904.
3379 - Fix build warnings about missing "a2x" comment when building the
3380 manpages from scratch on OpenBSD; OpenBSD calls it "a2x.py".
3381 Fixes bug 10929; bugfix on 0.2.2.9-alpha. Patch from Dana Koch.
3383 o Minor bugfixes (client):
3384 - Improve the log message when we can't connect to a hidden service
3385 because all of the hidden service directory nodes hosting its
3386 descriptor are excluded. Improves on our fix for bug 10722, which
3387 was a bugfix on 0.2.0.10-alpha.
3388 - Raise a control port warning when we fail to connect to all of
3389 our bridges. Previously, we didn't inform the controller, and
3390 the bootstrap process would stall. Fixes bug 11069; bugfix on
3392 - Exit immediately when a process-owning controller exits.
3393 Previously, tor relays would wait for a little while after their
3394 controller exited, as if they had gotten an INT signal -- but this
3395 was problematic, since there was no feedback for the user. To do a
3396 clean shutdown, controllers should send an INT signal and give Tor
3397 a chance to clean up. Fixes bug 10449; bugfix on 0.2.2.28-beta.
3398 - Stop attempting to connect to bridges before our pluggable
3399 transports are configured (harmless but resulted in some erroneous
3400 log messages). Fixes bug 11156; bugfix on 0.2.3.2-alpha.
3401 - Fix connections to IPv6 addresses over SOCKS5. Previously, we were
3402 generating incorrect SOCKS5 responses, and confusing client
3403 applications. Fixes bug 10987; bugfix on 0.2.4.7-alpha.
3405 o Minor bugfixes (relays and bridges):
3406 - Avoid crashing on a malformed resolv.conf file when running a
3407 relay using Libevent 1. Fixes bug 8788; bugfix on 0.1.1.23.
3408 - Non-exit relays no longer launch mock DNS requests to check for
3409 DNS hijacking. This has been unnecessary since 0.2.1.7-alpha, when
3410 non-exit relays stopped servicing DNS requests. Fixes bug 965;
3411 bugfix on 0.2.1.7-alpha. Patch from Matt Pagan.
3412 - Bridges now report complete directory request statistics. Related
3413 to bug 5824; bugfix on 0.2.2.1-alpha.
3414 - Bridges now never collect statistics that were designed for
3415 relays. Fixes bug 5824; bugfix on 0.2.3.8-alpha.
3416 - Stop giving annoying warning messages when we decide not to launch
3417 a pluggable transport proxy that we don't need (because there are
3418 no bridges configured to use it). Resolves ticket 5018; bugfix
3420 - Give the correct URL in the warning message when trying to run a
3421 relay on an ancient version of Windows. Fixes bug 9393.
3423 o Minor bugfixes (backtrace support):
3424 - Support automatic backtraces on more platforms by using the
3425 "-fasynchronous-unwind-tables" compiler option. This option is
3426 needed for platforms like 32-bit Intel where "-fomit-frame-pointer"
3427 is on by default and table generation is not. This doesn't yet
3428 add Windows support; only Linux, OSX, and some BSDs are affected.
3429 Reported by 'cypherpunks'; fixes bug 11047; bugfix on 0.2.5.2-alpha.
3430 - Avoid strange behavior if two threads hit failed assertions at the
3431 same time and both try to log backtraces at once. (Previously, if
3432 this had happened, both threads would have stored their intermediate
3433 results in the same buffer, and generated junk outputs.) Reported by
3434 "cypherpunks". Fixes bug 11048; bugfix on 0.2.5.2-alpha.
3435 - Fix a compiler warning in format_number_sigsafe(). Bugfix on
3436 0.2.5.2-alpha; patch from Nick Hopper.
3438 o Minor bugfixes (unit tests):
3439 - Fix a small bug in the unit tests that might have made the tests
3440 call 'chmod' with an uninitialized bitmask. Fixes bug 10928;
3441 bugfix on 0.2.5.1-alpha. Patch from Dana Koch.
3444 - Remove all remaining code related to version-0 hidden service
3445 descriptors: they have not been in use since 0.2.2.1-alpha. Fixes
3446 the rest of bug 10841.
3449 - Document in the manpage that "KBytes" may also be written as
3450 "kilobytes" or "KB", that "Kbits" may also be written as
3451 "kilobits", and so forth. Closes ticket 9222.
3452 - Document that the ClientOnly config option overrides ORPort.
3453 Our old explanation made ClientOnly sound as though it did
3454 nothing at all. Resolves bug 9059.
3455 - Explain that SocksPolicy, DirPolicy, and similar options don't
3456 take port arguments. Fixes the other part of ticket 11108.
3457 - Fix a comment about the rend_server_descriptor_t.protocols field
3458 to more accurately describe its range. Also, make that field
3459 unsigned, to more accurately reflect its usage. Fixes bug 9099;
3460 bugfix on 0.2.1.5-alpha.
3461 - Fix the manpage's description of HiddenServiceAuthorizeClient:
3462 the maximum client name length is 16, not 19. Fixes bug 11118;
3463 bugfix on 0.2.1.6-alpha.
3465 o Code simplifications and refactoring:
3466 - Get rid of router->address, since in all cases it was just the
3467 string representation of router->addr. Resolves ticket 5528.
3469 o Test infrastructure:
3470 - Update to the latest version of tinytest.
3471 - Improve the tinytest implementation of string operation tests so
3472 that comparisons with NULL strings no longer crash the tests; they
3473 now just fail, normally. Fixes bug 9004; bugfix on 0.2.2.4-alpha.
3476 Changes in version 0.2.4.21 - 2014-02-28
3477 Tor 0.2.4.21 further improves security against potential adversaries who
3478 find breaking 1024-bit crypto doable, and backports several stability
3479 and robustness patches from the 0.2.5 branch.
3481 o Major features (client security):
3482 - When we choose a path for a 3-hop circuit, make sure it contains
3483 at least one relay that supports the NTor circuit extension
3484 handshake. Otherwise, there is a chance that we're building
3485 a circuit that's worth attacking by an adversary who finds
3486 breaking 1024-bit crypto doable, and that chance changes the game
3487 theory. Implements ticket 9777.
3490 - Do not treat streams that fail with reason
3491 END_STREAM_REASON_INTERNAL as indicating a definite circuit failure,
3492 since it could also indicate an ENETUNREACH connection error. Fixes
3493 part of bug 10777; bugfix on 0.2.4.8-alpha.
3495 o Code simplification and refactoring:
3496 - Remove data structures which were introduced to implement the
3497 CellStatistics option: they are now redundant with the new timestamp
3498 field in the regular packed_cell_t data structure, which we did
3499 in 0.2.4.18-rc in order to resolve bug 9093. Resolves ticket 10870.
3502 - Always clear OpenSSL bignums before freeing them -- even bignums
3503 that don't contain secrets. Resolves ticket 10793. Patch by
3505 - Build without warnings under clang 3.4. (We have some macros that
3506 define static functions only some of which will get used later in
3507 the module. Starting with clang 3.4, these give a warning unless the
3508 unused attribute is set on them.) Resolves ticket 10904.
3509 - Update geoip and geoip6 files to the February 7 2014 Maxmind
3510 GeoLite2 Country database.
3513 - Set the listen() backlog limit to the largest actually supported
3514 on the system, not to the value in a header file. Fixes bug 9716;
3515 bugfix on every released Tor.
3516 - Treat ENETUNREACH, EACCES, and EPERM connection failures at an
3517 exit node as a NOROUTE error, not an INTERNAL error, since they
3518 can apparently happen when trying to connect to the wrong sort
3519 of netblocks. Fixes part of bug 10777; bugfix on 0.1.0.1-rc.
3520 - Fix build warnings about missing "a2x" comment when building the
3521 manpages from scratch on OpenBSD; OpenBSD calls it "a2x.py".
3522 Fixes bug 10929; bugfix on 0.2.2.9-alpha. Patch from Dana Koch.
3523 - Avoid a segfault on SIGUSR1, where we had freed a connection but did
3524 not entirely remove it from the connection lists. Fixes bug 9602;
3525 bugfix on 0.2.4.4-alpha.
3526 - Fix a segmentation fault in our benchmark code when running with
3527 Fedora's OpenSSL package, or any other OpenSSL that provides
3528 ECDH but not P224. Fixes bug 10835; bugfix on 0.2.4.8-alpha.
3529 - Turn "circuit handshake stats since last time" log messages into a
3530 heartbeat message. Fixes bug 10485; bugfix on 0.2.4.17-rc.
3532 o Documentation fixes:
3533 - Document that all but one DirPort entry must have the NoAdvertise
3534 flag set. Fixes bug 10470; bugfix on 0.2.3.3-alpha / 0.2.3.16-alpha.
3537 Changes in version 0.2.5.2-alpha - 2014-02-13
3538 Tor 0.2.5.2-alpha includes all the fixes from 0.2.4.18-rc and 0.2.4.20,
3539 like the "poor random number generation" fix and the "building too many
3540 circuits" fix. It also further improves security against potential
3541 adversaries who find breaking 1024-bit crypto doable, and launches
3542 pluggable transports on demand (which gets us closer to integrating
3543 pluggable transport support by default -- not to be confused with Tor
3544 bundles enabling pluggable transports and bridges by default).
3546 o Major features (client security):
3547 - When we choose a path for a 3-hop circuit, make sure it contains
3548 at least one relay that supports the NTor circuit extension
3549 handshake. Otherwise, there is a chance that we're building
3550 a circuit that's worth attacking by an adversary who finds
3551 breaking 1024-bit crypto doable, and that chance changes the game
3552 theory. Implements ticket 9777.
3553 - Clients now look at the "usecreatefast" consensus parameter to
3554 decide whether to use CREATE_FAST or CREATE cells for the first hop
3555 of their circuit. This approach can improve security on connections
3556 where Tor's circuit handshake is stronger than the available TLS
3557 connection security levels, but the tradeoff is more computational
3558 load on guard relays. Implements proposal 221. Resolves ticket 9386.
3560 o Major features (bridges):
3561 - Don't launch pluggable transport proxies if we don't have any
3562 bridges configured that would use them. Now we can list many
3563 pluggable transports, and Tor will dynamically start one when it
3564 hears a bridge address that needs it. Resolves ticket 5018.
3565 - The bridge directory authority now assigns status flags (Stable,
3566 Guard, etc) to bridges based on thresholds calculated over all
3567 Running bridges. Now bridgedb can finally make use of its features
3568 to e.g. include at least one Stable bridge in its answers. Fixes
3571 o Major features (other):
3572 - Extend ORCONN controller event to include an "ID" parameter,
3573 and add four new controller event types CONN_BW, CIRC_BW,
3574 CELL_STATS, and TB_EMPTY that show connection and circuit usage.
3575 The new events are emitted in private Tor networks only, with the
3576 goal of being able to better track performance and load during
3577 full-network simulations. Implements proposal 218 and ticket 7359.
3578 - On some platforms (currently: recent OSX versions, glibc-based
3579 platforms that support the ELF format, and a few other
3580 Unix-like operating systems), Tor can now dump stack traces
3581 when a crash occurs or an assertion fails. By default, traces
3582 are dumped to stderr (if possible) and to any logs that are
3583 reporting errors. Implements ticket 9299.
3586 - Avoid a segfault on SIGUSR1, where we had freed a connection but did
3587 not entirely remove it from the connection lists. Fixes bug 9602;
3588 bugfix on 0.2.4.4-alpha.
3589 - Do not treat streams that fail with reason
3590 END_STREAM_REASON_INTERNAL as indicating a definite circuit failure,
3591 since it could also indicate an ENETUNREACH connection error. Fixes
3592 part of bug 10777; bugfix on 0.2.4.8-alpha.
3594 o Major bugfixes (new since 0.2.5.1-alpha, also in 0.2.4.20):
3595 - Do not allow OpenSSL engines to replace the PRNG, even when
3596 HardwareAccel is set. The only default builtin PRNG engine uses
3597 the Intel RDRAND instruction to replace the entire PRNG, and
3598 ignores all attempts to seed it with more entropy. That's
3599 cryptographically stupid: the right response to a new alleged
3600 entropy source is never to discard all previously used entropy
3601 sources. Fixes bug 10402; works around behavior introduced in
3602 OpenSSL 1.0.0. Diagnosis and investigation thanks to "coderman"
3604 - Fix assertion failure when AutomapHostsOnResolve yields an IPv6
3605 address. Fixes bug 10465; bugfix on 0.2.4.7-alpha.
3606 - Avoid launching spurious extra circuits when a stream is pending.
3607 This fixes a bug where any circuit that _wasn't_ unusable for new
3608 streams would be treated as if it were, causing extra circuits to
3609 be launched. Fixes bug 10456; bugfix on 0.2.4.12-alpha.
3611 o Major bugfixes (new since 0.2.5.1-alpha, also in 0.2.4.18-rc):
3612 - No longer stop reading or writing on cpuworker connections when
3613 our rate limiting buckets go empty. Now we should handle circuit
3614 handshake requests more promptly. Resolves bug 9731.
3615 - Stop trying to bootstrap all our directory information from
3616 only our first guard. Discovered while fixing bug 9946; bugfix
3619 o Minor features (bridges, pluggable transports):
3620 - Add threshold cutoffs to the networkstatus document created by
3621 the Bridge Authority. Fixes bug 1117.
3622 - On Windows, spawn background processes using the CREATE_NO_WINDOW
3623 flag. Now Tor Browser Bundle 3.5 with pluggable transports enabled
3624 doesn't pop up a blank console window. (In Tor Browser Bundle 2.x,
3625 Vidalia set this option for us.) Implements ticket 10297.
3627 o Minor features (security):
3628 - Always clear OpenSSL bignums before freeing them -- even bignums
3629 that don't contain secrets. Resolves ticket 10793. Patch by
3632 o Minor features (config options and command line):
3633 - Add an --allow-missing-torrc commandline option that tells Tor to
3634 run even if the configuration file specified by -f is not available.
3635 Implements ticket 10060.
3636 - Add support for the TPROXY transparent proxying facility on Linux.
3637 See documentation for the new TransProxyType option for more
3638 details. Implementation by "thomo". Closes ticket 10582.
3640 o Minor features (controller):
3641 - Add a new "HS_DESC" controller event that reports activities
3642 related to hidden service descriptors. Resolves ticket 8510.
3643 - New "DROPGUARDS" controller command to forget all current entry
3644 guards. Not recommended for ordinary use, since replacing guards
3645 too frequently makes several attacks easier. Resolves ticket 9934;
3648 o Minor features (build):
3649 - Assume that a user using ./configure --host wants to cross-compile,
3650 and give an error if we cannot find a properly named
3651 tool-chain. Add a --disable-tool-name-check option to proceed
3652 nevertheless. Addresses ticket 9869. Patch by Benedikt Gollatz.
3653 - If we run ./configure and the compiler recognizes -fstack-protector
3654 but the linker rejects it, warn the user about a potentially missing
3655 libssp package. Addresses ticket 9948. Patch from Benedikt Gollatz.
3657 o Minor features (testing):
3658 - If Python is installed, "make check" now runs extra tests beyond
3659 the unit test scripts.
3660 - When bootstrapping a test network, sometimes very few relays get
3661 the Guard flag. Now a new option "TestingDirAuthVoteGuard" can
3662 specify a set of relays which should be voted Guard regardless of
3663 their uptime or bandwidth. Addresses ticket 9206.
3665 o Minor features (log messages):
3666 - When ServerTransportPlugin is set on a bridge, Tor can write more
3667 useful statistics about bridge use in its extrainfo descriptors,
3668 but only if the Extended ORPort ("ExtORPort") is set too. Add a
3669 log message to inform the user in this case. Resolves ticket 9651.
3670 - When receiving a new controller connection, log the origin address.
3671 Resolves ticket 9698; patch from "sigpipe".
3672 - When logging OpenSSL engine status at startup, log the status of
3673 more engines. Fixes ticket 10043; patch from Joshua Datko.
3674 - Turn "circuit handshake stats since last time" log messages into a
3675 heartbeat message. Fixes bug 10485; bugfix on 0.2.4.17-rc.
3677 o Minor features (new since 0.2.5.1-alpha, also in 0.2.4.18-rc):
3678 - Improve the circuit queue out-of-memory handler. Previously, when
3679 we ran low on memory, we'd close whichever circuits had the most
3680 queued cells. Now, we close those that have the *oldest* queued
3681 cells, on the theory that those are most responsible for us
3682 running low on memory. Based on analysis from a forthcoming paper
3683 by Jansen, Tschorsch, Johnson, and Scheuermann. Fixes bug 9093.
3684 - Generate bootstrapping status update events correctly when fetching
3685 microdescriptors. Fixes bug 9927.
3686 - Update to the October 2 2013 Maxmind GeoLite Country database.
3688 o Minor bugfixes (clients):
3689 - When closing a channel that has already been open, do not close
3690 pending circuits that were waiting to connect to the same relay.
3691 Fixes bug 9880; bugfix on 0.2.5.1-alpha. Thanks to skruffy for
3694 o Minor bugfixes (relays):
3695 - Treat ENETUNREACH, EACCES, and EPERM connection failures at an
3696 exit node as a NOROUTE error, not an INTERNAL error, since they
3697 can apparently happen when trying to connect to the wrong sort
3698 of netblocks. Fixes part of bug 10777; bugfix on 0.1.0.1-rc.
3700 o Minor bugfixes (bridges):
3701 - Fix a bug where the first connection works to a bridge that uses a
3702 pluggable transport with client-side parameters, but we don't send
3703 the client-side parameters on subsequent connections. (We don't
3704 use any pluggable transports with client-side parameters yet,
3705 but ScrambleSuit will soon become the first one.) Fixes bug 9162;
3706 bugfix on 0.2.0.3-alpha. Based on a patch from "rl1987".
3708 o Minor bugfixes (node selection):
3709 - If ExcludeNodes is set, consider non-excluded hidden service
3710 directory servers before excluded ones. Do not consider excluded
3711 hidden service directory servers at all if StrictNodes is
3712 set. (Previously, we would sometimes decide to connect to those
3713 servers, and then realize before we initiated a connection that
3714 we had excluded them.) Fixes bug 10722; bugfix on 0.2.0.10-alpha.
3716 - If we set the ExitNodes option but it doesn't include any nodes
3717 that have the Exit flag, we would choose not to bootstrap. Now we
3718 bootstrap so long as ExitNodes includes nodes which can exit to
3719 some port. Fixes bug 10543; bugfix on 0.2.4.10-alpha.
3721 o Minor bugfixes (controller and command-line):
3722 - If changing a config option via "setconf" fails in a recoverable
3723 way, we used to nonetheless write our new control ports to the
3724 file described by the "ControlPortWriteToFile" option. Now we only
3725 write out that file if we successfully switch to the new config
3726 option. Fixes bug 5605; bugfix on 0.2.2.26-beta. Patch from "Ryman".
3727 - When a command-line option such as --version or --help that
3728 ordinarily implies --hush appears on the command line along with
3729 --quiet, then actually obey --quiet. Previously, we obeyed --quiet
3730 only if it appeared later on the command line. Fixes bug 9578;
3731 bugfix on 0.2.5.1-alpha.
3733 o Minor bugfixes (code correctness):
3734 - Previously we used two temporary files when writing descriptors to
3735 disk; now we only use one. Fixes bug 1376.
3736 - Remove an erroneous (but impossible and thus harmless) pointer
3737 comparison that would have allowed compilers to skip a bounds
3738 check in channeltls.c. Fixes bugs 10313 and 9980; bugfix on
3739 0.2.0.10-alpha. Noticed by Jared L Wong and David Fifield.
3740 - Fix an always-true assertion in pluggable transports code so it
3741 actually checks what it was trying to check. Fixes bug 10046;
3742 bugfix on 0.2.3.9-alpha. Found by "dcb".
3744 o Minor bugfixes (protocol correctness):
3745 - When receiving a VERSIONS cell with an odd number of bytes, close
3746 the connection immediately since the cell is malformed. Fixes bug
3747 10365; bugfix on 0.2.0.10-alpha. Spotted by "bobnomnom"; fix by
3750 o Minor bugfixes (build):
3751 - Restore the ability to compile Tor with V2_HANDSHAKE_SERVER
3752 turned off (that is, without support for v2 link handshakes). Fixes
3753 bug 4677; bugfix on 0.2.3.2-alpha. Patch from "piet".
3754 - Fix compilation warnings and startup issues when running with
3755 "Sandbox 1" and libseccomp-2.1.0. Fixes bug 10563; bugfix on
3757 - Fix compilation on Solaris 9, which didn't like us having an
3758 identifier named "sun". Fixes bug 10565; bugfix in 0.2.5.1-alpha.
3760 o Minor bugfixes (testing):
3761 - Fix a segmentation fault in our benchmark code when running with
3762 Fedora's OpenSSL package, or any other OpenSSL that provides
3763 ECDH but not P224. Fixes bug 10835; bugfix on 0.2.4.8-alpha.
3765 o Minor bugfixes (log messages):
3766 - Fix a bug where clients using bridges would report themselves
3767 as 50% bootstrapped even without a live consensus document.
3768 Fixes bug 9922; bugfix on 0.2.1.1-alpha.
3769 - Suppress a warning where, if there's only one directory authority
3770 in the network, we would complain that votes and signatures cannot
3771 be uploaded to other directory authorities. Fixes bug 10842;
3772 bugfix on 0.2.2.26-beta.
3773 - Report bootstrapping progress correctly when we're downloading
3774 microdescriptors. We had updated our "do we have enough microdescs
3775 to begin building circuits?" logic most recently in 0.2.4.10-alpha
3776 (see bug 5956), but we left the bootstrap status event logic at
3777 "how far through getting 1/4 of them are we?" Fixes bug 9958;
3778 bugfix on 0.2.2.36, which is where they diverged (see bug 5343).
3780 o Minor bugfixes (new since 0.2.5.1-alpha, also in 0.2.4.20):
3781 - Avoid a crash bug when starting with a corrupted microdescriptor
3782 cache file. Fixes bug 10406; bugfix on 0.2.2.6-alpha.
3783 - If we fail to dump a previously cached microdescriptor to disk, avoid
3784 freeing duplicate data later on. Fixes bug 10423; bugfix on
3785 0.2.4.13-alpha. Spotted by "bobnomnom".
3787 o Minor bugfixes on 0.2.4.x (new since 0.2.5.1-alpha, also in 0.2.4.18-rc):
3788 - Correctly log long IPv6 exit policies, instead of truncating them
3789 or reporting an error. Fixes bug 9596; bugfix on 0.2.4.7-alpha.
3790 - Our default TLS ecdhe groups were backwards: we meant to be using
3791 P224 for relays (for performance win) and P256 for bridges (since
3792 it is more common in the wild). Instead we had it backwards. After
3793 reconsideration, we decided that the default should be P256 on all
3794 hosts, since its security is probably better, and since P224 is
3795 reportedly used quite little in the wild. Found by "skruffy" on
3796 IRC. Fix for bug 9780; bugfix on 0.2.4.8-alpha.
3797 - Free directory authority certificate download statuses on exit
3798 rather than leaking them. Fixes bug 9644; bugfix on 0.2.4.13-alpha.
3800 o Minor bugfixes on 0.2.3.x (new since 0.2.5.1-alpha, also in 0.2.4.18-rc):
3801 - If the guard we choose first doesn't answer, we would try the
3802 second guard, but once we connected to the second guard we would
3803 abandon it and retry the first one, slowing down bootstrapping.
3804 The fix is to treat all our initially chosen guards as acceptable
3805 to use. Fixes bug 9946; bugfix on 0.1.1.11-alpha.
3806 - Fix an assertion failure that would occur when disabling the
3807 ORPort setting on a running Tor process while accounting was
3808 enabled. Fixes bug 6979; bugfix on 0.2.2.18-alpha.
3809 - When examining the list of network interfaces to find our address,
3810 do not consider non-running or disabled network interfaces. Fixes
3811 bug 9904; bugfix on 0.2.3.11-alpha. Patch from "hantwister".
3812 - Avoid an off-by-one error when checking buffer boundaries when
3813 formatting the exit status of a pluggable transport helper.
3814 This is probably not an exploitable bug, but better safe than
3815 sorry. Fixes bug 9928; bugfix on 0.2.3.18-rc. Bug found by
3818 o Removed code and features:
3819 - Clients now reject any directory authority certificates lacking
3820 a dir-key-crosscert element. These have been included since
3821 0.2.1.9-alpha, so there's no real reason for them to be optional
3822 any longer. Completes proposal 157. Resolves ticket 10162.
3823 - Remove all code that existed to support the v2 directory system,
3824 since there are no longer any v2 directory authorities. Resolves
3826 - Remove the HSAuthoritativeDir and AlternateHSAuthority torrc
3827 options, which were used for designating authorities as "Hidden
3828 service authorities". There has been no use of hidden service
3829 authorities since 0.2.2.1-alpha, when we stopped uploading or
3830 downloading v0 hidden service descriptors. Fixes bug 10881; also
3831 part of a fix for bug 10841.
3833 o Code simplification and refactoring:
3834 - Remove some old fallback code designed to keep Tor clients working
3835 in a network with only two working relays. Elsewhere in the code we
3836 have long since stopped supporting such networks, so there wasn't
3837 much point in keeping it around. Addresses ticket 9926.
3838 - Reject 0-length EXTEND2 cells more explicitly. Fixes bug 10536;
3839 bugfix on 0.2.4.8-alpha. Reported by "cypherpunks".
3840 - Remove data structures which were introduced to implement the
3841 CellStatistics option: they are now redundant with the addition
3842 of a timestamp to the regular packed_cell_t data structure, which
3843 we did in 0.2.4.18-rc in order to resolve ticket 9093. Implements
3846 o Documentation (man page) fixes:
3847 - Update manpage to describe some of the files you can expect to
3848 find in Tor's DataDirectory. Addresses ticket 9839.
3849 - Document that all but one DirPort entry must have the NoAdvertise
3850 flag set. Fixes bug 10470; bugfix on 0.2.3.3-alpha / 0.2.3.16-alpha.
3852 o Documentation fixes (new since 0.2.5.1-alpha, also in 0.2.4.18-rc):
3853 - Clarify the usage and risks of setting the ContactInfo torrc line
3854 for your relay or bridge. Resolves ticket 9854.
3855 - Add anchors to the manpage so we can link to the html version of
3856 the documentation for specific options. Resolves ticket 9866.
3857 - Replace remaining references to DirServer in man page and
3858 log entries. Resolves ticket 10124.
3861 - Make the "tor-gencert" tool used by directory authority operators
3862 create 2048-bit signing keys by default (rather than 1024-bit, since
3863 1024-bit is uncomfortably small these days). Addresses ticket 10324.
3866 Changes in version 0.2.4.20 - 2013-12-22
3867 Tor 0.2.4.20 fixes potentially poor random number generation for users
3868 who 1) use OpenSSL 1.0.0 or later, 2) set "HardwareAccel 1" in their
3869 torrc file, 3) have "Sandy Bridge" or "Ivy Bridge" Intel processors,
3870 and 4) have no state file in their DataDirectory (as would happen on
3871 first start). Users who generated relay or hidden service identity
3872 keys in such a situation should discard them and generate new ones.
3874 This release also fixes a logic error that caused Tor clients to build
3875 many more preemptive circuits than they actually need.
3878 - Do not allow OpenSSL engines to replace the PRNG, even when
3879 HardwareAccel is set. The only default builtin PRNG engine uses
3880 the Intel RDRAND instruction to replace the entire PRNG, and
3881 ignores all attempts to seed it with more entropy. That's
3882 cryptographically stupid: the right response to a new alleged
3883 entropy source is never to discard all previously used entropy
3884 sources. Fixes bug 10402; works around behavior introduced in
3885 OpenSSL 1.0.0. Diagnosis and investigation thanks to "coderman"
3887 - Fix assertion failure when AutomapHostsOnResolve yields an IPv6
3888 address. Fixes bug 10465; bugfix on 0.2.4.7-alpha.
3889 - Avoid launching spurious extra circuits when a stream is pending.
3890 This fixes a bug where any circuit that _wasn't_ unusable for new
3891 streams would be treated as if it were, causing extra circuits to
3892 be launched. Fixes bug 10456; bugfix on 0.2.4.12-alpha.
3895 - Avoid a crash bug when starting with a corrupted microdescriptor
3896 cache file. Fixes bug 10406; bugfix on 0.2.2.6-alpha.
3897 - If we fail to dump a previously cached microdescriptor to disk, avoid
3898 freeing duplicate data later on. Fixes bug 10423; bugfix on
3899 0.2.4.13-alpha. Spotted by "bobnomnom".
3902 Changes in version 0.2.4.19 - 2013-12-11
3903 The Tor 0.2.4 release series is dedicated to the memory of Aaron Swartz
3904 (1986-2013). Aaron worked on diverse projects including helping to guide
3905 Creative Commons, playing a key role in stopping SOPA/PIPA, bringing
3906 transparency to the U.S government's PACER documents, and contributing
3907 design and development for Tor and Tor2Web. Aaron was one of the latest
3908 martyrs in our collective fight for civil liberties and human rights,
3909 and his death is all the more painful because he was one of us.
3911 Tor 0.2.4.19, the first stable release in the 0.2.4 branch, features
3912 a new circuit handshake and link encryption that use ECC to provide
3913 better security and efficiency; makes relays better manage circuit
3914 creation requests; uses "directory guards" to reduce client enumeration
3915 risks; makes bridges collect and report statistics about the pluggable
3916 transports they support; cleans up and improves our geoip database;
3917 gets much closer to IPv6 support for clients, bridges, and relays; makes
3918 directory authorities use measured bandwidths rather than advertised
3919 ones when computing flags and thresholds; disables client-side DNS
3920 caching to reduce tracking risks; and fixes a big bug in bridge
3921 reachability testing. This release introduces two new design
3922 abstractions in the code: a new "channel" abstraction between circuits
3923 and or_connections to allow for implementing alternate relay-to-relay
3924 transports, and a new "circuitmux" abstraction storing the queue of
3925 circuits for a channel. The release also includes many stability,
3926 security, and privacy fixes.
3929 Changes in version 0.2.4.18-rc - 2013-11-16
3930 Tor 0.2.4.18-rc is the fourth release candidate for the Tor 0.2.4.x
3931 series. It takes a variety of fixes from the 0.2.5.x branch to improve
3932 stability, performance, and better handling of edge cases.
3935 - Re-enable TLS 1.1 and 1.2 when built with OpenSSL 1.0.1e or later.
3936 Resolves ticket 6055. (OpenSSL before 1.0.1 didn't have TLS 1.1 or
3937 1.2, and OpenSSL from 1.0.1 through 1.0.1d had bugs that prevented
3938 renegotiation from working with TLS 1.1 or 1.2, so we had disabled
3939 them to solve bug 6033.)
3942 - No longer stop reading or writing on cpuworker connections when
3943 our rate limiting buckets go empty. Now we should handle circuit
3944 handshake requests more promptly. Resolves bug 9731.
3945 - If we are unable to save a microdescriptor to the journal, do not
3946 drop it from memory and then reattempt downloading it. Fixes bug
3947 9645; bugfix on 0.2.2.6-alpha.
3948 - Stop trying to bootstrap all our directory information from
3949 only our first guard. Discovered while fixing bug 9946; bugfix
3951 - The new channel code sometimes lost track of in-progress circuits,
3952 causing long-running clients to stop building new circuits. The
3953 fix is to always call circuit_n_chan_done(chan, 0) from
3954 channel_closed(). Fixes bug 9776; bugfix on 0.2.4.17-rc.
3956 o Minor bugfixes (on 0.2.4.x):
3957 - Correctly log long IPv6 exit policies, instead of truncating them
3958 or reporting an error. Fixes bug 9596; bugfix on 0.2.4.7-alpha.
3959 - Our default TLS ecdhe groups were backwards: we meant to be using
3960 P224 for relays (for performance win) and P256 for bridges (since
3961 it is more common in the wild). Instead we had it backwards. After
3962 reconsideration, we decided that the default should be P256 on all
3963 hosts, since its security is probably better, and since P224 is
3964 reportedly used quite little in the wild. Found by "skruffy" on
3965 IRC. Fix for bug 9780; bugfix on 0.2.4.8-alpha.
3966 - Free directory authority certificate download statuses on exit
3967 rather than leaking them. Fixes bug 9644; bugfix on 0.2.4.13-alpha.
3969 o Minor bugfixes (on 0.2.3.x and earlier):
3970 - If the guard we choose first doesn't answer, we would try the
3971 second guard, but once we connected to the second guard we would
3972 abandon it and retry the first one, slowing down bootstrapping.
3973 The fix is to treat all our initially chosen guards as acceptable
3974 to use. Fixes bug 9946; bugfix on 0.1.1.11-alpha.
3975 - Fix an assertion failure that would occur when disabling the
3976 ORPort setting on a running Tor process while accounting was
3977 enabled. Fixes bug 6979; bugfix on 0.2.2.18-alpha.
3978 - When examining the list of network interfaces to find our address,
3979 do not consider non-running or disabled network interfaces. Fixes
3980 bug 9904; bugfix on 0.2.3.11-alpha. Patch from "hantwister".
3981 - Avoid an off-by-one error when checking buffer boundaries when
3982 formatting the exit status of a pluggable transport helper.
3983 This is probably not an exploitable bug, but better safe than
3984 sorry. Fixes bug 9928; bugfix on 0.2.3.18-rc. Bug found by
3987 o Minor features (protecting client timestamps):
3988 - Clients no longer send timestamps in their NETINFO cells. These were
3989 not used for anything, and they provided one small way for clients
3990 to be distinguished from each other as they moved from network to
3991 network or behind NAT. Implements part of proposal 222.
3992 - Clients now round timestamps in INTRODUCE cells down to the nearest
3993 10 minutes. If a new Support022HiddenServices option is set to 0, or
3994 if it's set to "auto" and the feature is disabled in the consensus,
3995 the timestamp is sent as 0 instead. Implements part of proposal 222.
3996 - Stop sending timestamps in AUTHENTICATE cells. This is not such
3997 a big deal from a security point of view, but it achieves no actual
3998 good purpose, and isn't needed. Implements part of proposal 222.
3999 - Reduce down accuracy of timestamps in hidden service descriptors.
4000 Implements part of proposal 222.
4002 o Minor features (other):
4003 - Improve the circuit queue out-of-memory handler. Previously, when
4004 we ran low on memory, we'd close whichever circuits had the most
4005 queued cells. Now, we close those that have the *oldest* queued
4006 cells, on the theory that those are most responsible for us
4007 running low on memory. Based on analysis from a forthcoming paper
4008 by Jansen, Tschorsch, Johnson, and Scheuermann. Fixes bug 9093.
4009 - Generate bootstrapping status update events correctly when fetching
4010 microdescriptors. Fixes bug 9927.
4011 - Update to the October 2 2013 Maxmind GeoLite Country database.
4013 o Documentation fixes:
4014 - Clarify the usage and risks of setting the ContactInfo torrc line
4015 for your relay or bridge. Resolves ticket 9854.
4016 - Add anchors to the manpage so we can link to the html version of
4017 the documentation for specific options. Resolves ticket 9866.
4018 - Replace remaining references to DirServer in man page and
4019 log entries. Resolves ticket 10124.
4022 Changes in version 0.2.5.1-alpha - 2013-10-02
4023 Tor 0.2.5.1-alpha introduces experimental support for syscall sandboxing
4024 on Linux, allows bridges that offer pluggable transports to report usage
4025 statistics, fixes many issues to make testing easier, and provides
4026 a pile of minor features and bugfixes that have been waiting for a
4027 release of the new branch.
4029 This is the first alpha release in a new series, so expect there to
4030 be bugs. Users who would rather test out a more stable branch should
4031 stay with 0.2.4.x for now.
4033 o Major features (security):
4034 - Use the seccomp2 syscall filtering facility on Linux to limit
4035 which system calls Tor can invoke. This is an experimental,
4036 Linux-only feature to provide defense-in-depth against unknown
4037 attacks. To try turning it on, set "Sandbox 1" in your torrc
4038 file. Please be ready to report bugs. We hope to add support
4039 for better sandboxing in the future, including more fine-grained
4040 filters, better division of responsibility, and support for more
4041 platforms. This work has been done by Cristian-Matei Toader for
4042 Google Summer of Code.
4043 - Re-enable TLS 1.1 and 1.2 when built with OpenSSL 1.0.1e or later.
4044 Resolves ticket 6055. (OpenSSL before 1.0.1 didn't have TLS 1.1 or
4045 1.2, and OpenSSL from 1.0.1 through 1.0.1d had bugs that prevented
4046 renegotiation from working with TLS 1.1 or 1.2, so we had disabled
4047 them to solve bug 6033.)
4049 o Major features (other):
4050 - Add support for passing arguments to managed pluggable transport
4051 proxies. Implements ticket 3594.
4052 - Bridges now track GeoIP information and the number of their users
4053 even when pluggable transports are in use, and report usage
4054 statistics in their extra-info descriptors. Resolves tickets 4773
4056 - Make testing Tor networks bootstrap better: lower directory fetch
4057 retry schedules and maximum interval without directory requests,
4058 and raise maximum download tries. Implements ticket 6752.
4059 - Add make target 'test-network' to run tests on a Chutney network.
4060 Implements ticket 8530.
4061 - The ntor handshake is now on-by-default, no matter what the
4062 directory authorities recommend. Implements ticket 8561.
4065 - Instead of writing destroy cells directly to outgoing connection
4066 buffers, queue them and intersperse them with other outgoing cells.
4067 This can prevent a set of resource starvation conditions where too
4068 many pending destroy cells prevent data cells from actually getting
4069 delivered. Reported by "oftc_must_be_destroyed". Fixes bug 7912;
4070 bugfix on 0.2.0.1-alpha.
4071 - If we are unable to save a microdescriptor to the journal, do not
4072 drop it from memory and then reattempt downloading it. Fixes bug
4073 9645; bugfix on 0.2.2.6-alpha.
4074 - The new channel code sometimes lost track of in-progress circuits,
4075 causing long-running clients to stop building new circuits. The
4076 fix is to always call circuit_n_chan_done(chan, 0) from
4077 channel_closed(). Fixes bug 9776; bugfix on 0.2.4.17-rc.
4080 - Tor now builds each source file in two modes: a mode that avoids
4081 exposing identifiers needlessly, and another mode that exposes
4082 more identifiers for testing. This lets the compiler do better at
4083 optimizing the production code, while enabling us to take more
4084 radical measures to let the unit tests test things.
4085 - The production builds no longer include functions used only in
4086 the unit tests; all functions exposed from a module only for
4087 unit-testing are now static in production builds.
4088 - Add an --enable-coverage configuration option to make the unit
4089 tests (and a new src/or/tor-cov target) to build with gcov test
4093 - We now have rudimentary function mocking support that our unit
4094 tests can use to test functions in isolation. Function mocking
4095 lets the tests temporarily replace a function's dependencies with
4096 stub functions, so that the tests can check the function without
4097 invoking the other functions it calls.
4098 - Add more unit tests for the <circid,channel>->circuit map, and
4099 the destroy-cell-tracking code to fix bug 7912.
4100 - Unit tests for failing cases of the TAP onion handshake.
4101 - More unit tests for address-manipulation functions.
4103 o Minor features (protecting client timestamps):
4104 - Clients no longer send timestamps in their NETINFO cells. These were
4105 not used for anything, and they provided one small way for clients
4106 to be distinguished from each other as they moved from network to
4107 network or behind NAT. Implements part of proposal 222.
4108 - Clients now round timestamps in INTRODUCE cells down to the nearest
4109 10 minutes. If a new Support022HiddenServices option is set to 0, or
4110 if it's set to "auto" and the feature is disabled in the consensus,
4111 the timestamp is sent as 0 instead. Implements part of proposal 222.
4112 - Stop sending timestamps in AUTHENTICATE cells. This is not such
4113 a big deal from a security point of view, but it achieves no actual
4114 good purpose, and isn't needed. Implements part of proposal 222.
4115 - Reduce down accuracy of timestamps in hidden service descriptors.
4116 Implements part of proposal 222.
4118 o Minor features (config options):
4119 - Config (torrc) lines now handle fingerprints which are missing
4120 their initial '$'. Resolves ticket 4341; improvement over 0.0.9pre5.
4121 - Support a --dump-config option to print some or all of the
4122 configured options. Mainly useful for debugging the command-line
4123 option parsing code. Helps resolve ticket 4647.
4124 - Raise awareness of safer logging: notify user of potentially
4125 unsafe config options, like logging more verbosely than severity
4126 "notice" or setting SafeLogging to 0. Resolves ticket 5584.
4127 - Add a new configuration option TestingV3AuthVotingStartOffset
4128 that bootstraps a network faster by changing the timing for
4129 consensus votes. Addresses ticket 8532.
4130 - Add a new torrc option "ServerTransportOptions" that allows
4131 bridge operators to pass configuration parameters to their
4132 pluggable transports. Resolves ticket 8929.
4133 - The config (torrc) file now accepts bandwidth and space limits in
4134 bits as well as bytes. (Anywhere that you can say "2 Kilobytes",
4135 you can now say "16 kilobits", and so on.) Resolves ticket 9214.
4138 o Minor features (build):
4139 - Add support for `--library-versions` flag. Implements ticket 6384.
4140 - Return the "unexpected sendme" warnings to a warn severity, but make
4141 them rate limited, to help diagnose ticket 8093.
4142 - Detect a missing asciidoc, and warn the user about it, during
4143 configure rather than at build time. Fixes issue 6506. Patch from
4146 o Minor features (other):
4147 - Use the SOCK_NONBLOCK socket type, if supported, to open nonblocking
4148 sockets in a single system call. Implements ticket 5129.
4149 - Log current accounting state (bytes sent and received + remaining
4150 time for the current accounting period) in the relay's heartbeat
4151 message. Implements ticket 5526; patch from Peter Retzlaff.
4152 - Implement the TRANSPORT_LAUNCHED control port event that
4153 notifies controllers about new launched pluggable
4154 transports. Resolves ticket 5609.
4155 - If we're using the pure-C 32-bit curve25519_donna implementation
4156 of curve25519, build it with the -fomit-frame-pointer option to
4157 make it go faster on register-starved hosts. This improves our
4158 handshake performance by about 6% on i386 hosts without nacl.
4160 - Update to the September 4 2013 Maxmind GeoLite Country database.
4163 - Set the listen() backlog limit to the largest actually supported
4164 on the system, not to the value in a header file. Fixes bug 9716;
4165 bugfix on every released Tor.
4166 - No longer accept malformed http headers when parsing urls from
4167 headers. Now we reply with Bad Request ("400"). Fixes bug 2767;
4168 bugfix on 0.0.6pre1.
4169 - In munge_extrainfo_into_routerinfo(), check the return value of
4170 memchr(). This would have been a serious issue if we ever passed
4171 it a non-extrainfo. Fixes bug 8791; bugfix on 0.2.0.6-alpha. Patch
4173 - On the chance that somebody manages to build Tor on a
4174 platform where time_t is unsigned, correct the way that
4175 microdesc_add_to_cache() handles negative time arguments.
4176 Fixes bug 8042; bugfix on 0.2.3.1-alpha.
4177 - Reject relative control socket paths and emit a warning. Previously,
4178 single-component control socket paths would be rejected, but Tor
4179 would not log why it could not validate the config. Fixes bug 9258;
4180 bugfix on 0.2.3.16-alpha.
4182 o Minor bugfixes (command line):
4183 - Use a single command-line parser for parsing torrc options on the
4184 command line and for finding special command-line options to avoid
4185 inconsistent behavior for torrc option arguments that have the same
4186 names as command-line options. Fixes bugs 4647 and 9578; bugfix on
4188 - No longer allow 'tor --hash-password' with no arguments. Fixes bug
4189 9573; bugfix on 0.0.9pre5.
4191 o Minor fixes (build, auxiliary programs):
4192 - Stop preprocessing the "torify" script with autoconf, since
4193 it no longer refers to LOCALSTATEDIR. Fixes bug 5505; patch
4195 - The tor-fw-helper program now follows the standard convention and
4196 exits with status code "0" on success. Fixes bug 9030; bugfix on
4197 0.2.3.1-alpha. Patch by Arlo Breault.
4198 - Corrected ./configure advice for what openssl dev package you should
4199 install on Debian. Fixes bug 9207; bugfix on 0.2.0.1-alpha.
4201 o Minor code improvements:
4202 - Remove constants and tests for PKCS1 padding; it's insecure and
4203 shouldn't be used for anything new. Fixes bug 8792; patch
4205 - Remove instances of strcpy() from the unit tests. They weren't
4206 hurting anything, since they were only in the unit tests, but it's
4207 embarassing to have strcpy() in the code at all, and some analysis
4208 tools don't like it. Fixes bug 8790; bugfix on 0.2.3.6-alpha and
4209 0.2.3.8-alpha. Patch from Arlo Breault.
4212 - Remove migration code from when we renamed the "cached-routers"
4213 file to "cached-descriptors" back in 0.2.0.8-alpha. This
4214 incidentally resolves ticket 6502 by cleaning up the related code
4215 a bit. Patch from Akshay Hebbar.
4217 o Code simplification and refactoring:
4218 - Extract the common duplicated code for creating a subdirectory
4219 of the data directory and writing to a file in it. Fixes ticket
4220 4282; patch from Peter Retzlaff.
4221 - Since OpenSSL 0.9.7, the i2d_*() functions support allocating output
4222 buffer. Avoid calling twice: i2d_RSAPublicKey(), i2d_DHparams(),
4223 i2d_X509(), and i2d_PublicKey(). Resolves ticket 5170.
4224 - Add a set of accessor functions for the circuit timeout data
4225 structure. Fixes ticket 6153; patch from "piet".
4226 - Clean up exit paths from connection_listener_new(). Closes ticket
4227 8789. Patch from Arlo Breault.
4228 - Since we rely on OpenSSL 0.9.8 now, we can use EVP_PKEY_cmp()
4229 and drop our own custom pkey_eq() implementation. Fixes bug 9043.
4230 - Use a doubly-linked list to implement the global circuit list.
4231 Resolves ticket 9108. Patch from Marek Majkowski.
4232 - Remove contrib/id_to_fp.c since it wasn't used anywhere.
4235 Changes in version 0.2.4.17-rc - 2013-09-05
4236 Tor 0.2.4.17-rc is the third release candidate for the Tor 0.2.4.x
4237 series. It adds an emergency step to help us tolerate the massive
4238 influx of users: 0.2.4 clients using the new (faster and safer) "NTor"
4239 circuit-level handshakes now effectively jump the queue compared to
4240 the 0.2.3 clients using "TAP" handshakes. This release also fixes a
4241 big bug hindering bridge reachability tests.
4244 - Relays now process the new "NTor" circuit-level handshake requests
4245 with higher priority than the old "TAP" circuit-level handshake
4246 requests. We still process some TAP requests to not totally starve
4247 0.2.3 clients when NTor becomes popular. A new consensus parameter
4248 "NumNTorsPerTAP" lets us tune the balance later if we need to.
4249 Implements ticket 9574.
4252 - If the circuit build timeout logic is disabled (via the consensus,
4253 or because we are an authority), then don't build testing circuits.
4254 Fixes bug 9657; bugfix on 0.2.2.14-alpha.
4255 - Bridges now send AUTH_CHALLENGE cells during their v3 handshakes;
4256 previously they did not, which prevented them from receiving
4257 successful connections from relays for self-test or bandwidth
4258 testing. Also, when a relay is extending a circuit to a bridge,
4259 it needs to send a NETINFO cell, even when the bridge hasn't sent
4260 an AUTH_CHALLENGE cell. Fixes bug 9546; bugfix on 0.2.3.6-alpha.
4261 - If the time to download the next old-style networkstatus is in
4262 the future, do not decline to consider whether to download the
4263 next microdescriptor networkstatus. Fixes bug 9564; bugfix on
4267 - Avoid double-closing the listener socket in our socketpair()
4268 replacement (used on Windows) in the case where the addresses on
4269 our opened sockets don't match what we expected. Fixes bug 9400;
4270 bugfix on 0.0.2pre7. Found by Coverity.
4272 o Minor fixes (config options):
4273 - Avoid overflows when the user sets MaxCircuitDirtiness to a
4274 ridiculously high value, by imposing a (ridiculously high) 30-day
4275 maximum on MaxCircuitDirtiness.
4276 - Fix the documentation of HeartbeatPeriod to say that the heartbeat
4277 message is logged at notice, not at info.
4278 - Warn and fail if a server is configured not to advertise any
4279 ORPorts at all. (We need *something* to put in our descriptor,
4280 or we just won't work.)
4283 - Track how many "TAP" and "NTor" circuit handshake requests we get,
4284 and how many we complete, and log it every hour to help relay
4285 operators follow trends in network load. Addresses ticket 9658.
4286 - Update to the August 7 2013 Maxmind GeoLite Country database.
4289 Changes in version 0.2.4.16-rc - 2013-08-10
4290 Tor 0.2.4.16-rc is the second release candidate for the Tor 0.2.4.x
4291 series. It fixes several crash bugs in the 0.2.4 branch.
4294 - Fix a bug in the voting algorithm that could yield incorrect results
4295 when a non-naming authority declared too many flags. Fixes bug 9200;
4296 bugfix on 0.2.0.3-alpha.
4297 - Fix an uninitialized read that could in some cases lead to a remote
4298 crash while parsing INTRODUCE2 cells. Bugfix on 0.2.4.1-alpha.
4299 Anybody running a hidden service on the experimental 0.2.4.x
4300 branch should upgrade. (This is, so far as we know, unrelated to
4302 - Avoid an assertion failure when processing DNS replies without the
4303 answer types we expected. Fixes bug 9337; bugfix on 0.2.4.7-alpha.
4304 - Avoid a crash when using --hash-password. Fixes bug 9295; bugfix on
4305 0.2.4.15-rc. Found by stem integration tests.
4308 - Fix an invalid memory read that occured when a pluggable
4309 transport proxy failed its configuration protocol.
4310 Fixes bug 9288; bugfix on 0.2.4.1-alpha.
4311 - When evaluating whether to use a connection that we haven't
4312 decided is canonical using a recent link protocol version,
4313 decide that it's canonical only if it used address _does_
4314 match the desired address. Fixes bug 9309; bugfix on
4315 0.2.4.4-alpha. Reported by skruffy.
4316 - Make the default behavior of NumDirectoryGuards be to track
4317 NumEntryGuards. Now a user who changes only NumEntryGuards will get
4318 the behavior she expects. Fixes bug 9354; bugfix on 0.2.4.8-alpha.
4319 - Fix a spurious compilation warning with some older versions of
4320 GCC on FreeBSD. Fixes bug 9254; bugfix on 0.2.4.14-alpha.
4323 - Update to the July 3 2013 Maxmind GeoLite Country database.
4326 Changes in version 0.2.4.15-rc - 2013-07-01
4327 Tor 0.2.4.15-rc is the first release candidate for the Tor 0.2.4.x
4328 series. It fixes a few smaller bugs, but generally appears stable.
4329 Please test it and let us know whether it is!
4332 - When receiving a new configuration file via the control port's
4333 LOADCONF command, do not treat the defaults file as absent.
4334 Fixes bug 9122; bugfix on 0.2.3.9-alpha.
4337 - Issue a warning when running with the bufferevents backend enabled.
4338 It's still not stable, and people should know that they're likely
4339 to hit unexpected problems. Closes ticket 9147.
4342 Changes in version 0.2.4.14-alpha - 2013-06-18
4343 Tor 0.2.4.14-alpha fixes a pair of client guard enumeration problems
4344 present in 0.2.4.13-alpha.
4347 - When we have too much memory queued in circuits (according to a new
4348 MaxMemInCellQueues option), close the circuits consuming the most
4349 memory. This prevents us from running out of memory as a relay if
4350 circuits fill up faster than they can be drained. Fixes bug 9063;
4351 bugfix on the 54th commit of Tor. This bug is a further fix beyond
4352 bug 6252, whose fix was merged into 0.2.3.21-rc.
4354 This change also fixes an earlier approach taken in 0.2.4.13-alpha,
4355 where we tried to solve this issue simply by imposing an upper limit
4356 on the number of queued cells for a single circuit. That approach
4357 proved to be problematic, since there are ways to provoke clients to
4358 send a number of cells in excess of any such reasonable limit. Fixes
4359 bug 9072; bugfix on 0.2.4.13-alpha.
4361 - Limit hidden service descriptors to at most ten introduction
4362 points, to slow one kind of guard enumeration. Fixes bug 9002;
4363 bugfix on 0.1.1.11-alpha.
4366 Changes in version 0.2.4.13-alpha - 2013-06-14
4367 Tor 0.2.4.13-alpha fixes a variety of potential remote crash
4368 vulnerabilities, makes socks5 username/password circuit isolation
4369 actually actually work (this time for sure!), and cleans up a bunch
4370 of other issues in preparation for a release candidate.
4372 o Major bugfixes (robustness):
4373 - Close any circuit that has too many cells queued on it. Fixes
4374 bug 9063; bugfix on the 54th commit of Tor. This bug is a further
4375 fix beyond bug 6252, whose fix was merged into 0.2.3.21-rc.
4376 - Prevent the get_freelists() function from running off the end of
4377 the list of freelists if it somehow gets an unrecognized
4378 allocation. Fixes bug 8844; bugfix on 0.2.0.16-alpha. Reported by
4380 - Avoid an assertion failure on OpenBSD (and perhaps other BSDs)
4381 when an exit connection with optimistic data succeeds immediately
4382 rather than returning EINPROGRESS. Fixes bug 9017; bugfix on
4384 - Fix a directory authority crash bug when building a consensus
4385 using an older consensus as its basis. Fixes bug 8833. Bugfix
4389 - Avoid a memory leak where we would leak a consensus body when we
4390 find that a consensus which we couldn't previously verify due to
4391 missing certificates is now verifiable. Fixes bug 8719; bugfix
4393 - We used to always request authority certificates by identity digest,
4394 meaning we'd get the newest one even when we wanted one with a
4395 different signing key. Then we would complain about being given
4396 a certificate we already had, and never get the one we really
4397 wanted. Now we use the "fp-sk/" resource as well as the "fp/"
4398 resource to request the one we want. Fixes bug 5595; bugfix on
4400 - Follow the socks5 protocol when offering username/password
4401 authentication. The fix for bug 8117 exposed this bug, and it
4402 turns out real-world applications like Pidgin do care. Bugfix on
4403 0.2.3.2-alpha; fixes bug 8879.
4404 - Prevent failures on Windows Vista and later when rebuilding the
4405 microdescriptor cache. Diagnosed by Robert Ransom. Fixes bug 8822;
4406 bugfix on 0.2.4.12-alpha.
4409 - Fix an impossible buffer overrun in the AES unit tests. Fixes
4410 bug 8845; bugfix on 0.2.0.7-alpha. Found by eugenis.
4411 - If for some reason we fail to write a microdescriptor while
4412 rebuilding the cache, do not let the annotations from that
4413 microdescriptor linger in the cache file, and do not let the
4414 microdescriptor stay recorded as present in its old location.
4415 Fixes bug 9047; bugfix on 0.2.2.6-alpha.
4416 - Fix a memory leak that would occur whenever a configuration
4417 option changed. Fixes bug 8718; bugfix on 0.2.3.3-alpha.
4418 - Paste the description for PathBias parameters from the man
4419 page into or.h, so the code documents them too. Fixes bug 7982;
4420 bugfix on 0.2.3.17-beta and 0.2.4.8-alpha.
4421 - Relays now treat a changed IPv6 ORPort as sufficient reason to
4422 publish an updated descriptor. Fixes bug 6026; bugfix on
4424 - When launching a resolve request on behalf of an AF_UNIX control
4425 socket, omit the address field of the new entry connection, used in
4426 subsequent controller events, rather than letting tor_dup_addr()
4427 set it to "<unknown address type>". Fixes bug 8639; bugfix on
4430 o Minor bugfixes (log messages):
4431 - Fix a scaling issue in the path bias accounting code that
4432 resulted in "Bug:" log messages from either
4433 pathbias_scale_close_rates() or pathbias_count_build_success().
4434 This represents a bugfix on a previous bugfix: the original fix
4435 attempted in 0.2.4.10-alpha was incomplete. Fixes bug 8235; bugfix
4437 - Give a less useless error message when the user asks for an IPv4
4438 address on an IPv6-only port, or vice versa. Fixes bug 8846; bugfix
4442 - Downgrade "unexpected SENDME" warnings to protocol-warn for 0.2.4.x,
4443 to tolerate bug 8093 for now.
4444 - Add an "ignoring-advertised-bws" boolean to the flag-threshold lines
4445 in directory authority votes to describe whether they have enough
4446 measured bandwidths to ignore advertised (relay descriptor)
4447 bandwidth claims. Resolves ticket 8711.
4448 - Update to the June 5 2013 Maxmind GeoLite Country database.
4450 o Removed documentation:
4451 - Remove some of the older contents of doc/ as obsolete; move others
4452 to torspec.git. Fixes bug 8965.
4454 o Code simplification and refactoring:
4455 - Avoid using character buffers when constructing most directory
4456 objects: this approach was unwieldy and error-prone. Instead,
4457 build smartlists of strings, and concatenate them when done.
4460 Changes in version 0.2.4.12-alpha - 2013-04-18
4461 Tor 0.2.4.12-alpha moves Tor forward on several fronts: it starts the
4462 process for lengthening the guard rotation period, makes directory
4463 authority opinions in the consensus a bit less gameable, makes socks5
4464 username/password circuit isolation actually work, and fixes a wide
4465 variety of other issues.
4468 - Raise the default time that a client keeps an entry guard from
4469 "1-2 months" to "2-3 months", as suggested by Tariq Elahi's WPES
4470 2012 paper. (We would make it even longer, but we need better client
4471 load balancing first.) Also, make the guard lifetime controllable
4472 via a new GuardLifetime torrc option and a GuardLifetime consensus
4473 parameter. Start of a fix for bug 8240; bugfix on 0.1.1.11-alpha.
4474 - Directory authorities now prefer using measured bandwidths to
4475 advertised ones when computing flags and thresholds. Resolves
4477 - Directory authorities that have more than a threshold number
4478 of relays with measured bandwidths now treat relays with unmeasured
4479 bandwidths as having bandwidth 0. Resolves ticket 8435.
4481 o Major bugfixes (assert / resource use):
4482 - Avoid a bug where our response to TLS renegotiation under certain
4483 network conditions could lead to a busy-loop, with 100% CPU
4484 consumption. Fixes bug 5650; bugfix on 0.2.0.16-alpha.
4485 - Avoid an assertion when we discover that we'd like to write a cell
4486 onto a closing connection: just discard the cell. Fixes another
4487 case of bug 7350; bugfix on 0.2.4.4-alpha.
4489 o Major bugfixes (client-side privacy):
4490 - When we mark a circuit as unusable for new circuits, have it
4491 continue to be unusable for new circuits even if MaxCircuitDirtiness
4492 is increased too much at the wrong time, or the system clock jumps
4493 backwards. Fixes bug 6174; bugfix on 0.0.2pre26.
4494 - If ClientDNSRejectInternalAddresses ("do not believe DNS queries
4495 which have resolved to internal addresses") is set, apply that
4496 rule to IPv6 as well. Fixes bug 8475; bugfix on 0.2.0.7-alpha.
4497 - When an exit relay rejects a stream with reason "exit policy", but
4498 we only know an exit policy summary (e.g. from the microdesc
4499 consensus) for it, do not mark the relay as useless for all exiting.
4500 Instead, mark just the circuit as unsuitable for that particular
4501 address. Fixes part of bug 7582; bugfix on 0.2.3.2-alpha.
4502 - Allow applications to get proper stream isolation with
4503 IsolateSOCKSAuth. Many SOCKS5 clients that want to offer
4504 username/password authentication also offer "no authentication". Tor
4505 had previously preferred "no authentication", so the applications
4506 never actually sent Tor their auth details. Now Tor selects
4507 username/password authentication if it's offered. You can disable
4508 this behavior on a per-SOCKSPort basis via PreferSOCKSNoAuth. Fixes
4509 bug 8117; bugfix on 0.2.3.3-alpha.
4511 o Major bugfixes (other):
4512 - When unable to find any working directory nodes to use as a
4513 directory guard, give up rather than adding the same non-working
4514 nodes to the directory guard list over and over. Fixes bug 8231;
4515 bugfix on 0.2.4.8-alpha.
4518 - Reject as invalid most directory objects containing a NUL.
4519 Belt-and-suspender fix for bug 8037.
4520 - In our testsuite, create temporary directories with a bit more
4521 entropy in their name to make name collisions less likely. Fixes
4523 - Add CACHED keyword to ADDRMAP events in the control protocol
4524 to indicate whether a DNS result will be cached or not. Resolves
4526 - Update to the April 3 2013 Maxmind GeoLite Country database.
4528 o Minor features (build):
4529 - Detect and reject attempts to build Tor with threading support
4530 when OpenSSL has been compiled without threading support.
4532 - Clarify that when autoconf is checking for nacl, it is checking
4533 specifically for nacl with a fast curve25519 implementation.
4535 - Warn if building on a platform with an unsigned time_t: there
4536 are too many places where Tor currently assumes that time_t can
4537 hold negative values. We'd like to fix them all, but probably
4540 o Minor bugfixes (build):
4541 - Fix some bugs in tor-fw-helper-natpmp when trying to build and
4542 run it on Windows. More bugs likely remain. Patch from Gisle Vanem.
4543 Fixes bug 7280; bugfix on 0.2.3.1-alpha.
4544 - Add the old src/or/micro-revision.i filename to CLEANFILES.
4545 On the off chance that somebody has one, it will go away as soon
4546 as they run "make clean". Fix for bug 7143; bugfix on 0.2.4.1-alpha.
4547 - Build Tor correctly on 32-bit platforms where the compiler can build
4548 but not run code using the "uint128_t" construction. Fixes bug 8587;
4549 bugfix on 0.2.4.8-alpha.
4550 - Fix compilation warning with some versions of clang that would
4551 prefer the -Wswitch-enum compiler flag to warn about switch
4552 statements with missing enum values, even if those switch
4553 statements have a "default:" statement. Fixes bug 8598; bugfix
4556 o Minor bugfixes (protocol):
4557 - Fix the handling of a TRUNCATE cell when it arrives while the
4558 circuit extension is in progress. Fixes bug 7947; bugfix on 0.0.7.1.
4559 - Fix a misframing issue when reading the version numbers in a
4560 VERSIONS cell. Previously we would recognize [00 01 00 02] as
4561 'version 1, version 2, and version 0x100', when it should have
4562 only included versions 1 and 2. Fixes bug 8059; bugfix on
4563 0.2.0.10-alpha. Reported pseudonymously.
4564 - Make the format and order of STREAM events for DNS lookups
4565 consistent among the various ways to launch DNS lookups. Fixes
4566 bug 8203; bugfix on 0.2.0.24-rc. Patch by "Desoxy."
4567 - Correct our check for which versions of Tor support the EXTEND2
4568 cell. We had been willing to send it to Tor 0.2.4.7-alpha and
4569 later, when support was really added in version 0.2.4.8-alpha.
4570 Fixes bug 8464; bugfix on 0.2.4.8-alpha.
4572 o Minor bugfixes (other):
4573 - Correctly store microdescriptors and extrainfo descriptors with
4574 an internal NUL byte. Fixes bug 8037; bugfix on 0.2.0.1-alpha.
4575 Bug reported by "cypherpunks".
4576 - Increase the width of the field used to remember a connection's
4577 link protocol version to two bytes. Harmless for now, since the
4578 only currently recognized versions are one byte long. Reported
4579 pseudonymously. Fixes bug 8062; bugfix on 0.2.0.10-alpha.
4580 - If the state file's path bias counts are invalid (presumably from a
4581 buggy Tor prior to 0.2.4.10-alpha), make them correct. Also add
4582 additional checks and log messages to the scaling of Path Bias
4583 counts, in case there still are remaining issues with scaling.
4584 Should help resolve bug 8235.
4585 - Eliminate several instances where we use "Nickname=ID" to refer to
4586 nodes in logs. Use "Nickname (ID)" instead. (Elsewhere, we still use
4587 "$ID=Nickname", which is also acceptable.) Fixes bug 7065. Bugfix
4588 on 0.2.3.21-rc, 0.2.4.5-alpha, 0.2.4.8-alpha, and 0.2.4.10-alpha.
4590 o Minor bugfixes (syscalls):
4591 - Always check the return values of functions fcntl() and
4592 setsockopt(). We don't believe these are ever actually failing in
4593 practice, but better safe than sorry. Also, checking these return
4594 values should please analysis tools like Coverity. Patch from
4595 'flupzor'. Fixes bug 8206; bugfix on all versions of Tor.
4596 - Use direct writes rather than stdio when building microdescriptor
4597 caches, in an attempt to mitigate bug 8031, or at least make it
4600 o Minor bugfixes (config):
4601 - When rejecting a configuration because we were unable to parse a
4602 quoted string, log an actual error message. Fixes bug 7950; bugfix
4604 - Behave correctly when the user disables LearnCircuitBuildTimeout
4605 but doesn't tell us what they would like the timeout to be. Fixes
4606 bug 6304; bugfix on 0.2.2.14-alpha.
4607 - When autodetecting the number of CPUs, use the number of available
4608 CPUs in preference to the number of configured CPUs. Inform the
4609 user if this reduces the number of available CPUs. Fixes bug 8002;
4610 bugfix on 0.2.3.1-alpha.
4611 - Make it an error when you set EntryNodes but disable UseGuardNodes,
4612 since it will (surprisingly to some users) ignore EntryNodes. Fixes
4613 bug 8180; bugfix on 0.2.3.11-alpha.
4614 - Allow TestingTorNetworks to override the 4096-byte minimum for
4615 the Fast threshold. Otherwise they can't bootstrap until they've
4616 observed more traffic. Fixes bug 8508; bugfix on 0.2.4.10-alpha.
4617 - Fix some logic errors when the user manually overrides the
4618 PathsNeededToBuildCircuits option in torrc. Fixes bug 8599; bugfix
4621 o Minor bugfixes (log messages to help diagnose bugs):
4622 - If we fail to free a microdescriptor because of bug 7164, log
4623 the filename and line number from which we tried to free it.
4624 - Add another diagnostic to the heartbeat message: track and log
4625 overhead that TLS is adding to the data we write. If this is
4626 high, we are sending too little data to SSL_write at a time.
4627 Diagnostic for bug 7707.
4628 - Add more detail to a log message about relaxed timeouts, to help
4630 - Warn more aggressively when flushing microdescriptors to a
4631 microdescriptor cache fails, in an attempt to mitigate bug 8031,
4632 or at least make it more diagnosable.
4633 - Improve debugging output to help track down bug 8185 ("Bug:
4634 outgoing relay cell has n_chan==NULL. Dropping.")
4635 - Log the purpose of a path-bias testing circuit correctly.
4636 Improves a log message from bug 8477; bugfix on 0.2.4.8-alpha.
4638 o Minor bugfixes (0.2.4.x log messages that were too noisy):
4639 - Don't attempt to relax the timeout of already opened 1-hop circuits.
4640 They might never timeout. This should eliminate some/all cases of
4641 the relaxed timeout log message.
4642 - Use circuit creation time for network liveness evaluation. This
4643 should eliminate warning log messages about liveness caused
4644 by changes in timeout evaluation. Fixes bug 6572; bugfix on
4646 - Reduce a path bias length check from notice to info. The message
4647 is triggered when creating controller circuits. Fixes bug 8196;
4648 bugfix on 0.2.4.8-alpha.
4649 - Fix a path state issue that triggered a notice during relay startup.
4650 Fixes bug 8320; bugfix on 0.2.4.10-alpha.
4651 - Reduce occurrences of warns about circuit purpose in
4652 connection_ap_expire_building(). Fixes bug 8477; bugfix on
4655 o Minor bugfixes (pre-0.2.4.x log messages that were too noisy):
4656 - If we encounter a write failure on a SOCKS connection before we
4657 finish our SOCKS handshake, don't warn that we closed the
4658 connection before we could send a SOCKS reply. Fixes bug 8427;
4659 bugfix on 0.1.0.1-rc.
4660 - Correctly recognize that [::1] is a loopback address. Fixes
4661 bug 8377; bugfix on 0.2.1.3-alpha.
4662 - Fix a directory authority warn caused when we have a large amount
4663 of badexit bandwidth. Fixes bug 8419; bugfix on 0.2.2.10-alpha.
4664 - Don't log inappropriate heartbeat messages when hibernating: a
4665 hibernating node is _expected_ to drop out of the consensus,
4666 decide it isn't bootstrapped, and so forth. Fixes bug 7302;
4667 bugfix on 0.2.3.1-alpha.
4668 - Don't complain about bootstrapping problems while hibernating.
4669 These complaints reflect a general code problem, but not one
4670 with any problematic effects (no connections are actually
4671 opened). Fixes part of bug 7302; bugfix on 0.2.3.2-alpha.
4673 o Documentation fixes:
4674 - Update tor-fw-helper.1.txt and tor-fw-helper.c to make option
4675 names match. Fixes bug 7768.
4676 - Make the torify manpage no longer refer to tsocks; torify hasn't
4677 supported tsocks since 0.2.3.14-alpha.
4678 - Make the tor manpage no longer reference tsocks.
4679 - Fix the GeoIPExcludeUnknown documentation to refer to
4680 ExcludeExitNodes rather than the currently nonexistent
4681 ExcludeEntryNodes. Spotted by "hamahangi" on tor-talk.
4684 - The tor-tsocks.conf is no longer distributed or installed. We
4685 recommend that tsocks users use torsocks instead. Resolves
4689 Changes in version 0.2.4.11-alpha - 2013-03-11
4690 Tor 0.2.4.11-alpha makes relay measurement by directory authorities
4691 more robust, makes hidden service authentication work again, and
4692 resolves a DPI fingerprint for Tor's SSL transport.
4694 o Major features (directory authorities):
4695 - Directory authorities now support a new consensus method (17)
4696 where they cap the published bandwidth of servers for which
4697 insufficient bandwidth measurements exist. Fixes part of bug 2286.
4698 - Directory authorities that set "DisableV2DirectoryInfo_ 1" no longer
4699 serve any v2 directory information. Now we can test disabling the
4700 old deprecated v2 directory format, and see whether doing so has
4701 any effect on network load. Begins to fix bug 6783.
4702 - Directory authorities now include inside each vote a statement of
4703 the performance thresholds they used when assigning flags.
4704 Implements ticket 8151.
4706 o Major bugfixes (directory authorities):
4707 - Stop marking every relay as having been down for one hour every
4708 time we restart a directory authority. These artificial downtimes
4709 were messing with our Stable and Guard flag calculations. Fixes
4710 bug 8218 (introduced by the fix for 1035). Bugfix on 0.2.2.23-alpha.
4712 o Major bugfixes (hidden services):
4713 - Allow hidden service authentication to succeed again. When we
4714 refactored the hidden service introduction code back
4715 in 0.2.4.1-alpha, we didn't update the code that checks
4716 whether authentication information is present, causing all
4717 authentication checks to return "false". Fix for bug 8207; bugfix
4718 on 0.2.4.1-alpha. Found by Coverity; this is CID 718615.
4720 o Minor features (relays, bridges):
4721 - Make bridge relays check once a minute for whether their IP
4722 address has changed, rather than only every 15 minutes. Resolves
4724 - Refactor resolve_my_address() so it returns the method by which we
4725 decided our public IP address (explicitly configured, resolved from
4726 explicit hostname, guessed from interfaces, learned by gethostname).
4727 Now we can provide more helpful log messages when a relay guesses
4728 its IP address incorrectly (e.g. due to unexpected lines in
4729 /etc/hosts). Resolves ticket 2267.
4730 - Teach bridge-using clients to avoid 0.2.2 bridges when making
4731 microdescriptor-related dir requests, and only fall back to normal
4732 descriptors if none of their bridges can handle microdescriptors
4733 (as opposed to the fix in ticket 4013, which caused them to fall
4734 back to normal descriptors if *any* of their bridges preferred
4735 them). Resolves ticket 4994.
4736 - Randomize the lifetime of our SSL link certificate, so censors can't
4737 use the static value for filtering Tor flows. Resolves ticket 8443;
4738 related to ticket 4014 which was included in 0.2.2.33.
4739 - Support a new version of the link protocol that allows 4-byte circuit
4740 IDs. Previously, circuit IDs were limited to 2 bytes, which presented
4741 a possible resource exhaustion issue. Closes ticket 7351; implements
4744 o Minor features (portability):
4745 - Tweak the curve25519-donna*.c implementations to tolerate systems
4746 that lack stdint.h. Fixes bug 3894; bugfix on 0.2.4.8-alpha.
4747 - Use Ville Laurikari's implementation of AX_CHECK_SIGN() to determine
4748 the signs of types during autoconf. This is better than our old
4749 approach, which didn't work when cross-compiling.
4750 - Detect the sign of enum values, rather than assuming that MSC is the
4751 only compiler where enum types are all signed. Fixes bug 7727;
4752 bugfix on 0.2.4.10-alpha.
4754 o Minor features (other):
4755 - Say "KBytes" rather than "KB" in the man page (for various values
4756 of K), to further reduce confusion about whether Tor counts in
4757 units of memory or fractions of units of memory. Resolves ticket 7054.
4758 - Clear the high bit on curve25519 public keys before passing them to
4759 our backend, in case we ever wind up using a backend that doesn't do
4760 so itself. If we used such a backend, and *didn't* clear the high bit,
4761 we could wind up in a situation where users with such backends would
4762 be distinguishable from users without. Fixes bug 8121; bugfix on
4764 - Update to the March 6 2013 Maxmind GeoLite Country database.
4766 o Minor bugfixes (clients):
4767 - When we receive a RELAY_END cell with the reason DONE, or with no
4768 reason, before receiving a RELAY_CONNECTED cell, report the SOCKS
4769 status as "connection refused". Previously we reported these cases
4770 as success but then immediately closed the connection. Fixes bug
4771 7902; bugfix on 0.1.0.1-rc. Reported by "oftc_must_be_destroyed".
4772 - Downgrade an assertion in connection_ap_expire_beginning to an
4773 LD_BUG message. The fix for bug 8024 should prevent this message
4774 from displaying, but just in case, a warn that we can diagnose
4775 is better than more assert crashes. Fixes bug 8065; bugfix on
4777 - Lower path use bias thresholds to .80 for notice and .60 for warn.
4778 Also make the rate limiting flags for the path use bias log messages
4779 independent from the original path bias flags. Fixes bug 8161;
4780 bugfix on 0.2.4.10-alpha.
4782 o Minor bugfixes (relays):
4783 - Stop trying to resolve our hostname so often (e.g. every time we
4784 think about doing a directory fetch). Now we reuse the cached
4785 answer in some cases. Fixes bugs 1992 (bugfix on 0.2.0.20-rc)
4786 and 2410 (bugfix on 0.1.2.2-alpha).
4787 - Stop sending a stray "(null)" in some cases for the server status
4788 "EXTERNAL_ADDRESS" controller event. Resolves bug 8200; bugfix
4790 - When choosing which stream on a formerly stalled circuit to wake
4791 first, make better use of the platform's weak RNG. Previously,
4792 we had been using the % ("modulo") operator to try to generate a
4793 1/N chance of picking each stream, but this behaves badly with
4794 many platforms' choice of weak RNG. Fixes bug 7801; bugfix on
4796 - Use our own weak RNG when we need a weak RNG. Windows's rand() and
4797 Irix's random() only return 15 bits; Solaris's random() returns more
4798 bits but its RAND_MAX says it only returns 15, and so on. Motivated
4799 by the fix for bug 7801; bugfix on 0.2.2.20-alpha.
4801 o Minor bugfixes (directory authorities):
4802 - Directory authorities now use less space when formatting identical
4803 microdescriptor lines in directory votes. Fixes bug 8158; bugfix
4806 o Minor bugfixes (memory leaks spotted by Coverity -- bug 7816):
4807 - Avoid leaking memory if we fail to compute a consensus signature
4808 or we generate a consensus we can't parse. Bugfix on 0.2.0.5-alpha.
4809 - Fix a memory leak when receiving headers from an HTTPS proxy. Bugfix
4811 - Fix a memory leak during safe-cookie controller authentication.
4812 Bugfix on 0.2.3.13-alpha.
4813 - Avoid memory leak of IPv6 policy content if we fail to format it into
4814 a router descriptor. Bugfix on 0.2.4.7-alpha.
4816 o Minor bugfixes (other code correctness issues):
4817 - Avoid a crash if we fail to generate an extrainfo descriptor.
4818 Fixes bug 8208; bugfix on 0.2.3.16-alpha. Found by Coverity;
4820 - When detecting the largest possible file descriptor (in order to
4821 close all file descriptors when launching a new program), actually
4822 use _SC_OPEN_MAX. The old code for doing this was very, very broken.
4823 Fixes bug 8209; bugfix on 0.2.3.1-alpha. Found by Coverity; this
4825 - Fix a copy-and-paste error when adding a missing A1 to a routerset
4826 because of GeoIPExcludeUnknown. Fix for Coverity CID 980650.
4827 Bugfix on 0.2.4.10-alpha.
4828 - Fix an impossible-to-trigger integer overflow when estimating how
4829 long our onionskin queue would take. (This overflow would require us
4830 to accept 4 million onionskins before processing 100 of them.) Fixes
4831 bug 8210; bugfix on 0.2.4.10-alpha.
4833 o Code simplification and refactoring:
4834 - Add a wrapper function for the common "log a message with a
4838 Changes in version 0.2.4.10-alpha - 2013-02-04
4839 Tor 0.2.4.10-alpha adds defenses at the directory authority level from
4840 certain attacks that flood the network with relays; changes the queue
4841 for circuit create requests from a sized-based limit to a time-based
4842 limit; resumes building with MSVC on Windows; and fixes a wide variety
4845 o Major bugfixes (directory authority):
4846 - When computing directory thresholds, ignore any rejected-as-sybil
4847 nodes during the computation so that they can't influence Fast,
4848 Guard, etc. (We should have done this for proposal 109.) Fixes
4850 - When marking a node as a likely sybil, reset its uptime metrics
4851 to zero, so that it cannot time towards getting marked as Guard,
4852 Stable, or HSDir. (We should have done this for proposal 109.) Fixes
4856 - When a TLS write is partially successful but incomplete, remember
4857 that the flushed part has been flushed, and notice that bytes were
4858 actually written. Reported and fixed pseudonymously. Fixes bug
4859 7708; bugfix on Tor 0.1.0.5-rc.
4860 - Reject bogus create and relay cells with 0 circuit ID or 0 stream
4861 ID: these could be used to create unexpected streams and circuits
4862 which would count as "present" to some parts of Tor but "absent"
4863 to others, leading to zombie circuits and streams or to a bandwidth
4864 denial-of-service. Fixes bug 7889; bugfix on every released version
4865 of Tor. Reported by "oftc_must_be_destroyed".
4866 - Rename all macros in our local copy of queue.h to begin with "TOR_".
4867 This change seems the only good way to permanently prevent conflicts
4868 with queue.h on various operating systems. Fixes bug 8107; bugfix
4871 o Major features (relay):
4872 - Instead of limiting the number of queued onionskins (aka circuit
4873 create requests) to a fixed, hard-to-configure number, we limit
4874 the size of the queue based on how many we expect to be able to
4875 process in a given amount of time. We estimate the time it will
4876 take to process an onionskin based on average processing time
4877 of previous onionskins. Closes ticket 7291. You'll never have to
4878 configure MaxOnionsPending again.
4880 o Major features (portability):
4881 - Resume building correctly with MSVC and Makefile.nmake. This patch
4882 resolves numerous bugs and fixes reported by ultramage, including
4883 7305, 7308, 7309, 7310, 7312, 7313, 7315, 7316, and 7669.
4884 - Make the ntor and curve25519 code build correctly with MSVC.
4885 Fix on 0.2.4.8-alpha.
4888 - When directory authorities are computing thresholds for flags,
4889 never let the threshold for the Fast flag fall below 4096
4890 bytes. Also, do not consider nodes with extremely low bandwidths
4891 when deciding thresholds for various directory flags. This change
4892 should raise our threshold for Fast relays, possibly in turn
4893 improving overall network performance; see ticket 1854. Resolves
4895 - The Tor client now ignores sub-domain components of a .onion
4896 address. This change makes HTTP "virtual" hosting
4897 possible: http://foo.aaaaaaaaaaaaaaaa.onion/ and
4898 http://bar.aaaaaaaaaaaaaaaa.onion/ can be two different websites
4899 hosted on the same hidden service. Implements proposal 204.
4900 - We compute the overhead from passing onionskins back and forth to
4901 cpuworkers, and report it when dumping statistics in response to
4902 SIGUSR1. Supports ticket 7291.
4904 o Minor features (path selection):
4905 - When deciding whether we have enough descriptors to build circuits,
4906 instead of looking at raw relay counts, look at which fraction
4907 of (bandwidth-weighted) paths we're able to build. This approach
4908 keeps clients from building circuits if their paths are likely to
4909 stand out statistically. The default fraction of paths needed is
4910 taken from the consensus directory; you can override it with the
4911 new PathsNeededToBuildCircuits option. Fixes ticket 5956.
4912 - When any country code is listed in ExcludeNodes or ExcludeExitNodes,
4913 and we have GeoIP information, also exclude all nodes with unknown
4914 countries "??" and "A1". This behavior is controlled by the
4915 new GeoIPExcludeUnknown option: you can make such nodes always
4916 excluded with "GeoIPExcludeUnknown 1", and disable the feature
4917 with "GeoIPExcludeUnknown 0". Setting "GeoIPExcludeUnknown auto"
4918 gets you the default behavior. Implements feature 7706.
4919 - Path Use Bias: Perform separate accounting for successful circuit
4920 use. Keep separate statistics on stream attempt rates versus stream
4921 success rates for each guard. Provide configurable thresholds to
4922 determine when to emit log messages or disable use of guards that
4923 fail too many stream attempts. Resolves ticket 7802.
4925 o Minor features (log messages):
4926 - When learning a fingerprint for a bridge, log its corresponding
4927 transport type. Implements ticket 7896.
4928 - Improve the log message when "Bug/attack: unexpected sendme cell
4929 from client" occurs, to help us track bug 8093.
4932 - Remove a couple of extraneous semicolons that were upsetting the
4933 cparser library. Patch by Christian Grothoff. Fixes bug 7115;
4934 bugfix on 0.2.2.1-alpha.
4935 - Remove a source of rounding error during path bias count scaling;
4936 don't count cannibalized circuits as used for path bias until we
4937 actually try to use them; and fix a circuit_package_relay_cell()
4938 warning message about n_chan==NULL. Fixes bug 7802.
4939 - Detect nacl when its headers are in a nacl/ subdirectory. Also,
4940 actually link against nacl when we're configured to use it. Fixes
4941 bug 7972; bugfix on 0.2.4.8-alpha.
4942 - Compile correctly with the --disable-curve25519 option. Fixes
4943 bug 8153; bugfix on 0.2.4.8-alpha.
4945 o Build improvements:
4946 - Do not report status verbosely from autogen.sh unless the -v flag
4947 is specified. Fixes issue 4664. Patch from Onizuka.
4948 - Replace all calls to snprintf() outside of src/ext with
4949 tor_snprintf(). Also remove the #define to replace snprintf with
4950 _snprintf on Windows; they have different semantics, and all of
4951 our callers should be using tor_snprintf() anyway. Fixes bug 7304.
4952 - Try to detect if we are ever building on a platform where
4953 memset(...,0,...) does not set the value of a double to 0.0. Such
4954 platforms are permitted by the C standard, though in practice
4955 they're pretty rare (since IEEE 754 is nigh-ubiquitous). We don't
4956 currently support them, but it's better to detect them and fail
4957 than to perform erroneously.
4960 - Stop exporting estimates of v2 and v3 directory traffic shares
4961 in extrainfo documents. They were unneeded and sometimes inaccurate.
4962 Also stop exporting any v2 directory request statistics. Resolves
4964 - Drop support for detecting and warning about versions of Libevent
4965 before 1.3e. Nothing reasonable ships with them any longer;
4966 warning the user about them shouldn't be needed. Resolves ticket
4969 o Code simplifications and refactoring:
4970 - Rename "isin" functions to "contains", for grammar. Resolves
4972 - Rename Tor's logging function log() to tor_log(), to avoid conflicts
4973 with the natural logarithm function from the system libm. Resolves
4977 Changes in version 0.2.4.9-alpha - 2013-01-15
4978 Tor 0.2.4.9-alpha provides a quick fix to make the new ntor handshake
4982 - Fix backward compatibility logic when receiving an embedded ntor
4983 handshake tunneled in a CREATE cell. This clears up the "Bug:
4984 couldn't format CREATED cell" warning. Fixes bug 7959; bugfix
4988 Changes in version 0.2.4.8-alpha - 2013-01-14
4989 Tor 0.2.4.8-alpha introduces directory guards to reduce user enumeration
4990 risks, adds a new stronger and faster circuit handshake, and offers
4991 stronger and faster link encryption when both sides support it.
4994 - Preliminary support for directory guards (proposal 207): when
4995 possible, clients now use their entry guards for non-anonymous
4996 directory requests. This can help prevent client enumeration. Note
4997 that this behavior only works when we have a usable consensus
4998 directory, and when options about what to download are more or less
4999 standard. In the future we should re-bootstrap from our guards,
5000 rather than re-bootstrapping from the preconfigured list of
5001 directory sources that ships with Tor. Resolves ticket 6526.
5002 - Tor relays and clients now support a better CREATE/EXTEND cell
5003 format, allowing the sender to specify multiple address, identity,
5004 and handshake types. Implements Robert Ransom's proposal 200;
5007 o Major features (new circuit handshake):
5008 - Tor now supports a new circuit extension handshake designed by Ian
5009 Goldberg, Douglas Stebila, and Berkant Ustaoglu. Our original
5010 circuit extension handshake, later called "TAP", was a bit slow
5011 (especially on the relay side), had a fragile security proof, and
5012 used weaker keys than we'd now prefer. The new circuit handshake
5013 uses Dan Bernstein's "curve25519" elliptic-curve Diffie-Hellman
5014 function, making it significantly more secure than the older
5015 handshake, and significantly faster. Tor can use one of two built-in
5016 pure-C curve25519-donna implementations by Adam Langley, or it
5017 can link against the "nacl" library for a tuned version if present.
5019 The built-in version is very fast for 64-bit systems when building
5020 with GCC. The built-in 32-bit version is still faster than the
5021 old TAP protocol, but using libnacl is better on most such hosts.
5023 Clients don't currently use this protocol by default, since
5024 comparatively few clients support it so far. To try it, set
5025 UseNTorHandshake to 1.
5027 Implements proposal 216; closes ticket 7202.
5029 o Major features (better link encryption):
5030 - Relays can now enable the ECDHE TLS ciphersuites when available
5031 and appropriate. These ciphersuites let us negotiate forward-secure
5032 TLS secret keys more safely and more efficiently than with our
5033 previous use of Diffie-Hellman modulo a 1024-bit prime. By default,
5034 public relays prefer the (faster) P224 group, and bridges prefer
5035 the (more common) P256 group; you can override this with the
5038 Enabling these ciphers was a little tricky, since for a long time,
5039 clients had been claiming to support them without actually doing
5040 so, in order to foil fingerprinting. But with the client-side
5041 implementation of proposal 198 in 0.2.3.17-beta, clients can now
5042 match the ciphers from recent Firefox versions *and* list the
5043 ciphers they actually mean, so relays can believe such clients
5044 when they advertise ECDHE support in their TLS ClientHello messages.
5046 This feature requires clients running 0.2.3.17-beta or later,
5047 and requires both sides to be running OpenSSL 1.0.0 or later
5048 with ECC support. OpenSSL 1.0.1, with the compile-time option
5049 "enable-ec_nistp_64_gcc_128", is highly recommended.
5051 Implements the relay side of proposal 198; closes ticket 7200.
5054 - Avoid crashing when, as a relay without IPv6-exit support, a
5055 client insists on getting an IPv6 address or nothing. Fixes bug
5056 7814; bugfix on 0.2.4.7-alpha.
5059 - Improve circuit build timeout handling for hidden services.
5060 In particular: adjust build timeouts more accurately depending
5061 upon the number of hop-RTTs that a particular circuit type
5062 undergoes. Additionally, launch intro circuits in parallel
5063 if they timeout, and take the first one to reply as valid.
5064 - Work correctly on Unix systems where EAGAIN and EWOULDBLOCK are
5065 separate error codes; or at least, don't break for that reason.
5066 Fixes bug 7935. Reported by "oftc_must_be_destroyed".
5067 - Update to the January 2 2013 Maxmind GeoLite Country database.
5069 o Minor features (testing):
5070 - Add benchmarks for DH (1024-bit multiplicative group) and ECDH
5071 (P-256) Diffie-Hellman handshakes to src/or/bench.
5072 - Add benchmark functions to test onion handshake performance.
5074 o Minor features (path bias detection):
5075 - Alter the Path Bias log messages to be more descriptive in terms
5076 of reporting timeouts and other statistics.
5077 - Create three levels of Path Bias log messages, as opposed to just
5078 two. These are configurable via consensus as well as via the torrc
5079 options PathBiasNoticeRate, PathBiasWarnRate, PathBiasExtremeRate.
5080 The default values are 0.70, 0.50, and 0.30 respectively.
5081 - Separate the log message levels from the decision to drop guards,
5082 which also is available via torrc option PathBiasDropGuards.
5083 PathBiasDropGuards still defaults to 0 (off).
5084 - Deprecate PathBiasDisableRate in favor of PathBiasDropGuards
5085 in combination with PathBiasExtremeRate.
5086 - Increase the default values for PathBiasScaleThreshold and
5087 PathBiasCircThreshold from (200, 20) to (300, 150).
5088 - Add in circuit usage accounting to path bias. If we try to use a
5089 built circuit but fail for any reason, it counts as path bias.
5090 Certain classes of circuits where the adversary gets to pick your
5091 destination node are exempt from this accounting. Usage accounting
5092 can be specifically disabled via consensus parameter or torrc.
5093 - Convert all internal path bias state to double-precision floating
5094 point, to avoid roundoff error and other issues.
5095 - Only record path bias information for circuits that have completed
5096 *two* hops. Assuming end-to-end tagging is the attack vector, this
5097 makes us more resilient to ambient circuit failure without any
5098 detection capability loss.
5100 o Minor bugfixes (log messages):
5101 - Rate-limit the "No circuits are opened. Relaxed timeout for a
5102 circuit with channel state open..." message to once per hour to
5103 keep it from filling the notice logs. Mitigates bug 7799 but does
5104 not fix the underlying cause. Bugfix on 0.2.4.7-alpha.
5105 - Avoid spurious warnings when configuring multiple client ports of
5106 which only some are nonlocal. Previously, we had claimed that some
5107 were nonlocal when in fact they weren't. Fixes bug 7836; bugfix on
5110 o Code simplifications and refactoring:
5111 - Get rid of a couple of harmless clang warnings, where we compared
5112 enums to ints. These warnings are newly introduced in clang 3.2.
5113 - Split the onion.c file into separate modules for the onion queue
5114 and the different handshakes it supports.
5115 - Remove the marshalling/unmarshalling code for sending requests to
5116 cpuworkers over a socket, and instead just send structs. The
5117 recipient will always be the same Tor binary as the sender, so
5118 any encoding is overkill.
5121 Changes in version 0.2.4.7-alpha - 2012-12-24
5122 Tor 0.2.4.7-alpha introduces a new approach to providing fallback
5123 directory mirrors for more robust bootstrapping; fixes more issues where
5124 clients with changing network conditions refuse to make any circuits;
5125 adds initial support for exiting to IPv6 addresses; resumes being able
5126 to update our GeoIP database, and includes the geoip6 file this time;
5127 turns off the client-side DNS cache by default due to privacy risks;
5128 and fixes a variety of other issues.
5130 o Major features (client resilience):
5131 - Add a new "FallbackDir" torrc option to use when we can't use
5132 a directory mirror from the consensus (either because we lack a
5133 consensus, or because they're all down). Currently, all authorities
5134 are fallbacks by default, and there are no other default fallbacks,
5135 but that will change. This option will allow us to give clients a
5136 longer list of servers to try to get a consensus from when first
5137 connecting to the Tor network, and thereby reduce load on the
5138 directory authorities. Implements proposal 206, "Preconfigured
5139 directory sources for bootstrapping". We also removed the old
5140 "FallbackNetworkstatus" option, since we never got it working well
5141 enough to use it. Closes bug 572.
5142 - If we have no circuits open, use a relaxed timeout (the
5143 95-percentile cutoff) until a circuit succeeds. This heuristic
5144 should allow Tor to succeed at building circuits even when the
5145 network connection drastically changes. Should help with bug 3443.
5147 o Major features (IPv6):
5148 - Relays can now exit to IPv6 addresses: make sure that you have IPv6
5149 connectivity, then set the IPv6Exit flag to 1. Also make sure your
5150 exit policy reads as you would like: the address * applies to all
5151 address families, whereas *4 is IPv4 address only, and *6 is IPv6
5152 addresses only. On the client side, you'll need to wait until the
5153 authorities have upgraded, wait for enough exits to support IPv6,
5154 apply the "IPv6Traffic" flag to a SocksPort, and use Socks5. Closes
5155 ticket 5547, implements proposal 117 as revised in proposal 208.
5157 We DO NOT recommend that clients with actual anonymity needs start
5158 using IPv6 over Tor yet, since not enough exits support it yet.
5160 o Major features (geoip database):
5161 - Maxmind began labelling Tor relays as being in country "A1",
5162 which breaks by-country node selection inside Tor. Now we use a
5163 script to replace "A1" ("Anonymous Proxy") entries in our geoip
5164 file with real country codes. This script fixes about 90% of "A1"
5165 entries automatically and uses manual country code assignments to
5166 fix the remaining 10%. See src/config/README.geoip for details.
5167 Fixes bug 6266. Also update to the December 5 2012 Maxmind GeoLite
5168 Country database, as modified above.
5170 o Major bugfixes (client-side DNS):
5171 - Turn off the client-side DNS cache by default. Updating and using
5172 the DNS cache is now configurable on a per-client-port
5173 level. SOCKSPort, DNSPort, etc lines may now contain
5174 {No,}Cache{IPv4,IPv6,}DNS lines to indicate that we shouldn't
5175 cache these types of DNS answers when we receive them from an
5176 exit node in response to an application request on this port, and
5177 {No,}UseCached{IPv4,IPv6,DNS} lines to indicate that if we have
5178 cached DNS answers of these types, we shouldn't use them. It's
5179 potentially risky to use cached DNS answers at the client, since
5180 doing so can indicate to one exit what answers we've gotten
5181 for DNS lookups in the past. With IPv6, this becomes especially
5182 problematic. Using cached DNS answers for requests on the same
5183 circuit would present less linkability risk, since all traffic
5184 on a circuit is already linkable, but it would also provide
5185 little performance benefit: the exit node caches DNS replies
5186 too. Implements a simplified version of Proposal 205. Implements
5189 o Major bugfixes (other):
5190 - Alter circuit build timeout measurement to start at the point
5191 where we begin the CREATE/CREATE_FAST step (as opposed to circuit
5192 initialization). This should make our timeout measurements more
5193 uniform. Previously, we were sometimes including ORconn setup time
5194 in our circuit build time measurements. Should resolve bug 3443.
5195 - Fix an assertion that could trigger in hibernate_go_dormant() when
5196 closing an or_connection_t: call channel_mark_for_close() rather
5197 than connection_mark_for_close(). Fixes bug 7267. Bugfix on
5199 - Include the geoip6 IPv6 GeoIP database in the tarball. Fixes bug
5200 7655; bugfix on 0.2.4.6-alpha.
5203 - Add a new torrc option "ServerTransportListenAddr" to let bridge
5204 operators select the address where their pluggable transports will
5205 listen for connections. Resolves ticket 7013.
5206 - Allow an optional $ before the node identity digest in the
5207 controller command GETINFO ns/id/<identity>, for consistency with
5208 md/id/<identity> and desc/id/<identity>. Resolves ticket 7059.
5209 - Log packaged cell fullness as part of the heartbeat message.
5210 Diagnosis to try to determine the extent of bug 7743.
5212 o Minor features (IPv6):
5213 - AutomapHostsOnResolve now supports IPv6 addresses. By default, we
5214 prefer to hand out virtual IPv6 addresses, since there are more of
5215 them and we can't run out. To override this behavior and make IPv4
5216 addresses preferred, set NoPreferIPv6Automap on whatever SOCKSPort
5217 or DNSPort you're using for resolving. Implements ticket 7571.
5218 - AutomapHostsOnResolve responses are now randomized, to avoid
5219 annoying situations where Tor is restarted and applications
5220 connect to the wrong addresses.
5221 - Never try more than 1000 times to pick a new virtual address when
5222 AutomapHostsOnResolve is set. That's good enough so long as we
5223 aren't close to handing out our entire virtual address space;
5224 if you're getting there, it's best to switch to IPv6 virtual
5228 - The ADDRMAP command can no longer generate an ill-formed error
5229 code on a failed MAPADDRESS. It now says "internal" rather than
5230 an English sentence fragment with spaces in the middle. Bugfix on
5232 - Fix log messages and comments to avoid saying "GMT" when we mean
5233 "UTC". Fixes bug 6113.
5234 - Compile on win64 using mingw64. Fixes bug 7260; patches from
5236 - Fix a crash when debugging unit tests on Windows: deallocate a
5237 shared library with FreeLibrary, not CloseHandle. Fixes bug 7306;
5238 bugfix on 0.2.2.17-alpha. Reported by "ultramage".
5241 - The DirServer option is now DirAuthority, for consistency with
5242 current naming patterns. You can still use the old DirServer form.
5244 o Code simplification and refactoring:
5245 - Move the client-side address-map/virtual-address/DNS-cache code
5246 out of connection_edge.c into a new addressmap.c module.
5247 - Remove unused code for parsing v1 directories and "running routers"
5248 documents. Fixes bug 6887.
5251 Changes in version 0.2.3.25 - 2012-11-19
5252 The Tor 0.2.3 release series is dedicated to the memory of Len "rabbi"
5253 Sassaman (1980-2011), a long-time cypherpunk, anonymity researcher,
5254 Mixmaster maintainer, Pynchon Gate co-designer, CodeCon organizer,
5255 programmer, and friend. Unstinting in his dedication to the cause of
5256 freedom, he inspired and helped many of us as we began our work on
5257 anonymity, and inspires us still. Please honor his memory by writing
5258 software to protect people's freedoms, and by helping others to do so.
5260 Tor 0.2.3.25, the first stable release in the 0.2.3 branch, features
5261 significantly reduced directory overhead (via microdescriptors),
5262 enormous crypto performance improvements for fast relays on new
5263 enough hardware, a new v3 TLS handshake protocol that can better
5264 resist fingerprinting, support for protocol obfuscation plugins (aka
5265 pluggable transports), better scalability for hidden services, IPv6
5266 support for bridges, performance improvements like allowing clients
5267 to skip the first round-trip on the circuit ("optimistic data") and
5268 refilling token buckets more often, a new "stream isolation" design
5269 to isolate different applications on different circuits, and many
5270 stability, security, and privacy fixes.
5273 - Tor tries to wipe potentially sensitive data after using it, so
5274 that if some subsequent security failure exposes Tor's memory,
5275 the damage will be limited. But we had a bug where the compiler
5276 was eliminating these wipe operations when it decided that the
5277 memory was no longer visible to a (correctly running) program,
5278 hence defeating our attempt at defense in depth. We fix that
5279 by using OpenSSL's OPENSSL_cleanse() operation, which a compiler
5280 is unlikely to optimize away. Future versions of Tor may use
5281 a less ridiculously heavy approach for this. Fixes bug 7352.
5282 Reported in an article by Andrey Karpov.
5285 - Fix a harmless bug when opting against publishing a relay descriptor
5286 because DisableNetwork is set. Fixes bug 7464; bugfix on
5290 Changes in version 0.2.4.6-alpha - 2012-11-13
5291 Tor 0.2.4.6-alpha fixes an assert bug that has been plaguing relays,
5292 makes our defense-in-depth memory wiping more reliable, and begins to
5293 count IPv6 addresses in bridge statistics,
5296 - Fix an assertion failure that could occur when closing a connection
5297 with a spliced rendezvous circuit. Fix for bug 7212; bugfix on
5299 - Tor tries to wipe potentially sensitive data after using it, so
5300 that if some subsequent security failure exposes Tor's memory,
5301 the damage will be limited. But we had a bug where the compiler
5302 was eliminating these wipe operations when it decided that the
5303 memory was no longer visible to a (correctly running) program,
5304 hence defeating our attempt at defense in depth. We fix that
5305 by using OpenSSL's OPENSSL_cleanse() operation, which a compiler
5306 is unlikely to optimize away. Future versions of Tor may use
5307 a less ridiculously heavy approach for this. Fixes bug 7352.
5308 Reported in an article by Andrey Karpov.
5311 - Add GeoIP database for IPv6 addresses. The new config option
5313 - Bridge statistics now count bridge clients connecting over IPv6:
5314 bridge statistics files now list "bridge-ip-versions" and
5315 extra-info documents list "geoip6-db-digest". The control protocol
5316 "CLIENTS_SEEN" and "ip-to-country" queries now support IPv6. Initial
5317 implementation by "shkoo", addressing ticket 5055.
5320 - Warn when we are binding low ports when hibernation is enabled;
5321 previously we had warned when we were _advertising_ low ports with
5322 hibernation enabled. Fixes bug 7285; bugfix on 0.2.3.9-alpha.
5323 - Fix a harmless bug when opting against publishing a relay descriptor
5324 because DisableNetwork is set. Fixes bug 7464; bugfix on
5326 - Add warning message when a managed proxy dies during configuration.
5327 Fixes bug 7195; bugfix on 0.2.4.2-alpha.
5328 - Fix a linking error when building tor-fw-helper without miniupnp.
5329 Fixes bug 7235; bugfix on 0.2.4.2-alpha. Fix by Anthony G. Basile.
5330 - Check for closing an or_connection_t without going through correct
5331 channel functions; emit a warning and then call
5332 connection_or_close_for_error() so we don't assert as in bugs 7212
5334 - Compile correctly on compilers without C99 designated initializer
5335 support. Fixes bug 7286; bugfix on 0.2.4.4-alpha.
5336 - Avoid a possible assert that can occur when channel_send_destroy() is
5337 called on a channel in CHANNEL_STATE_CLOSING, CHANNEL_STATE_CLOSED,
5338 or CHANNEL_STATE_ERROR when the Tor process is resumed after being
5339 blocked for a long interval. Fixes bug 7350; bugfix on 0.2.4.4-alpha.
5340 - Fix a memory leak on failing cases of channel_tls_process_certs_cell.
5341 Fixes bug 7422; bugfix on 0.2.4.4-alpha.
5343 o Code simplification and refactoring:
5344 - Start using OpenBSD's implementation of queue.h, so that we don't
5345 need to hand-roll our own pointer and list structures whenever we
5346 need them. (We can't rely on a sys/queue.h, since some operating
5347 systems don't have them, and the ones that do have them don't all
5348 present the same extensions.)
5351 Changes in version 0.2.4.5-alpha - 2012-10-25
5352 Tor 0.2.4.5-alpha comes hard at the heels of 0.2.4.4-alpha, to fix
5353 two important security vulnerabilities that could lead to remotely
5354 triggerable relay crashes, fix a major bug that was preventing clients
5355 from choosing suitable exit nodes, and refactor some of our code.
5357 o Major bugfixes (security, also in 0.2.3.24-rc):
5358 - Fix a group of remotely triggerable assertion failures related to
5359 incorrect link protocol negotiation. Found, diagnosed, and fixed
5360 by "some guy from France". Fix for CVE-2012-2250; bugfix on
5362 - Fix a denial of service attack by which any directory authority
5363 could crash all the others, or by which a single v2 directory
5364 authority could crash everybody downloading v2 directory
5365 information. Fixes bug 7191; bugfix on 0.2.0.10-alpha.
5367 o Major bugfixes (also in 0.2.3.24-rc):
5368 - When parsing exit policy summaries from microdescriptors, we had
5369 previously been ignoring the last character in each one, so that
5370 "accept 80,443,8080" would be treated by clients as indicating
5371 a node that allows access to ports 80, 443, and 808. That would
5372 lead to clients attempting connections that could never work,
5373 and ignoring exit nodes that would support their connections. Now
5374 clients parse these exit policy summaries correctly. Fixes bug 7192;
5375 bugfix on 0.2.3.1-alpha.
5377 o Minor bugfixes (also in 0.2.3.24-rc):
5378 - Clients now consider the ClientRejectInternalAddresses config option
5379 when using a microdescriptor consensus stanza to decide whether
5380 an exit relay would allow exiting to an internal address. Fixes
5381 bug 7190; bugfix on 0.2.3.1-alpha.
5384 - Only disable TLS session ticket support when running as a TLS
5385 server. Now clients will blend better with regular Firefox
5386 connections. Fixes bug 7189; bugfix on Tor 0.2.3.23-rc.
5388 o Code simplification and refactoring:
5389 - Start using OpenBSD's implementation of queue.h (originally by
5391 - Move the entry node code from circuitbuild.c to its own file.
5392 - Move the circuit build timeout tracking code from circuitbuild.c
5396 Changes in version 0.2.3.24-rc - 2012-10-25
5397 Tor 0.2.3.24-rc fixes two important security vulnerabilities that
5398 could lead to remotely triggerable relay crashes, and fixes
5399 a major bug that was preventing clients from choosing suitable exit
5402 o Major bugfixes (security):
5403 - Fix a group of remotely triggerable assertion failures related to
5404 incorrect link protocol negotiation. Found, diagnosed, and fixed
5405 by "some guy from France". Fix for CVE-2012-2250; bugfix on
5407 - Fix a denial of service attack by which any directory authority
5408 could crash all the others, or by which a single v2 directory
5409 authority could crash everybody downloading v2 directory
5410 information. Fixes bug 7191; bugfix on 0.2.0.10-alpha.
5413 - When parsing exit policy summaries from microdescriptors, we had
5414 previously been ignoring the last character in each one, so that
5415 "accept 80,443,8080" would be treated by clients as indicating
5416 a node that allows access to ports 80, 443, and 808. That would
5417 lead to clients attempting connections that could never work,
5418 and ignoring exit nodes that would support their connections. Now
5419 clients parse these exit policy summaries correctly. Fixes bug 7192;
5420 bugfix on 0.2.3.1-alpha.
5423 - Clients now consider the ClientRejectInternalAddresses config option
5424 when using a microdescriptor consensus stanza to decide whether
5425 an exit relay would allow exiting to an internal address. Fixes
5426 bug 7190; bugfix on 0.2.3.1-alpha.
5429 Changes in version 0.2.4.4-alpha - 2012-10-20
5430 Tor 0.2.4.4-alpha adds a new v3 directory authority, fixes a privacy
5431 vulnerability introduced by a change in OpenSSL, fixes a remotely
5432 triggerable assert, and adds new channel_t and circuitmux_t abstractions
5433 that will make it easier to test new connection transport and cell
5434 scheduling algorithms.
5436 o New directory authorities (also in 0.2.3.23-rc):
5437 - Add Faravahar (run by Sina Rabbani) as the ninth v3 directory
5438 authority. Closes ticket 5749.
5440 o Major bugfixes (security/privacy, also in 0.2.3.23-rc):
5441 - Disable TLS session tickets. OpenSSL's implementation was giving
5442 our TLS session keys the lifetime of our TLS context objects, when
5443 perfect forward secrecy would want us to discard anything that
5444 could decrypt a link connection as soon as the link connection
5445 was closed. Fixes bug 7139; bugfix on all versions of Tor linked
5446 against OpenSSL 1.0.0 or later. Found by Florent Daignière.
5447 - Discard extraneous renegotiation attempts once the V3 link
5448 protocol has been initiated. Failure to do so left us open to
5449 a remotely triggerable assertion failure. Fixes CVE-2012-2249;
5450 bugfix on 0.2.3.6-alpha. Reported by "some guy from France".
5452 o Internal abstraction features:
5453 - Introduce new channel_t abstraction between circuits and
5454 or_connection_t to allow for implementing alternate OR-to-OR
5455 transports. A channel_t is an abstract object which can either be a
5456 cell-bearing channel, which is responsible for authenticating and
5457 handshaking with the remote OR and transmitting cells to and from
5458 it, or a listening channel, which spawns new cell-bearing channels
5459 at the request of remote ORs. Implements part of ticket 6465.
5460 - Also new is the channel_tls_t subclass of channel_t, adapting it
5461 to the existing or_connection_t code. The V2/V3 protocol handshaking
5462 code which formerly resided in command.c has been moved below the
5463 channel_t abstraction layer and may be found in channeltls.c now.
5464 Implements the rest of ticket 6465.
5465 - Introduce new circuitmux_t storing the queue of circuits for
5466 a channel; this encapsulates and abstracts the queue logic and
5467 circuit selection policy, and allows the latter to be overridden
5468 easily by switching out a policy object. The existing EWMA behavior
5469 is now implemented as a circuitmux_policy_t. Resolves ticket 6816.
5471 o Required libraries:
5472 - Tor now requires OpenSSL 0.9.8 or later. OpenSSL 1.0.0 or later is
5473 strongly recommended.
5476 - Warn users who run hidden services on a Tor client with
5477 UseEntryGuards disabled that their hidden services will be
5478 vulnerable to http://freehaven.net/anonbib/#hs-attack06 (the
5479 attack which motivated Tor to support entry guards in the first
5480 place). Resolves ticket 6889.
5481 - Tor now builds correctly on Bitrig, an OpenBSD fork. Patch from
5482 dhill. Resolves ticket 6982.
5483 - Option OutboundBindAddress can be specified multiple times and
5484 accepts IPv6 addresses. Resolves ticket 6876.
5486 o Minor bugfixes (also in 0.2.3.23-rc):
5487 - Don't serve or accept v2 hidden service descriptors over a
5488 relay's DirPort. It's never correct to do so, and disabling it
5489 might make it more annoying to exploit any bugs that turn up in the
5490 descriptor-parsing code. Fixes bug 7149.
5491 - Fix two cases in src/or/transports.c where we were calling
5492 fmt_addr() twice in a parameter list. Bug found by David
5493 Fifield. Fixes bug 7014; bugfix on 0.2.3.9-alpha.
5494 - Fix memory leaks whenever we logged any message about the "path
5495 bias" detection. Fixes bug 7022; bugfix on 0.2.3.21-rc.
5496 - When relays refuse a "create" cell because their queue of pending
5497 create cells is too big (typically because their cpu can't keep up
5498 with the arrival rate), send back reason "resource limit" rather
5499 than reason "internal", so network measurement scripts can get a
5500 more accurate picture. Fixes bug 7037; bugfix on 0.1.1.11-alpha.
5503 - Command-line option "--version" implies "--quiet". Fixes bug 6997.
5504 - Free some more still-in-use memory at exit, to make hunting for
5505 memory leaks easier. Resolves bug 7029.
5506 - When a Tor client gets a "truncated" relay cell, the first byte of
5507 its payload specifies why the circuit was truncated. We were
5508 ignoring this 'reason' byte when tearing down the circuit, resulting
5509 in the controller not being told why the circuit closed. Now we
5510 pass the reason from the truncated cell to the controller. Bugfix
5511 on 0.1.2.3-alpha; fixes bug 7039.
5512 - Downgrade "Failed to hand off onionskin" messages to "debug"
5513 severity, since they're typically redundant with the "Your computer
5514 is too slow" messages. Fixes bug 7038; bugfix on 0.2.2.16-alpha.
5515 - Make clients running with IPv6 bridges connect over IPv6 again,
5516 even without setting new config options ClientUseIPv6 and
5517 ClientPreferIPv6ORPort. Fixes bug 6757; bugfix on 0.2.4.1-alpha.
5518 - Use square brackets around IPv6 addresses in numerous places
5519 that needed them, including log messages, HTTPS CONNECT proxy
5520 requests, TransportProxy statefile entries, and pluggable transport
5521 extra-info lines. Fixes bug 7011; patch by David Fifield.
5523 o Code refactoring and cleanup:
5524 - Source files taken from other packages now reside in src/ext;
5525 previously they were scattered around the rest of Tor.
5526 - Avoid use of reserved identifiers in our C code. The C standard
5527 doesn't like us declaring anything that starts with an
5528 underscore, so let's knock it off before we get in trouble. Fix
5529 for bug 1031; bugfix on the first Tor commit.
5532 Changes in version 0.2.3.23-rc - 2012-10-20
5533 Tor 0.2.3.23-rc adds a new v3 directory authority, fixes a privacy
5534 vulnerability introduced by a change in OpenSSL, and fixes a variety
5535 of smaller bugs in preparation for the release.
5537 o New directory authorities:
5538 - Add Faravahar (run by Sina Rabbani) as the ninth v3 directory
5539 authority. Closes ticket 5749.
5541 o Major bugfixes (security/privacy):
5542 - Disable TLS session tickets. OpenSSL's implementation was giving
5543 our TLS session keys the lifetime of our TLS context objects, when
5544 perfect forward secrecy would want us to discard anything that
5545 could decrypt a link connection as soon as the link connection
5546 was closed. Fixes bug 7139; bugfix on all versions of Tor linked
5547 against OpenSSL 1.0.0 or later. Found by Florent Daignière.
5548 - Discard extraneous renegotiation attempts once the V3 link
5549 protocol has been initiated. Failure to do so left us open to
5550 a remotely triggerable assertion failure. Fixes CVE-2012-2249;
5551 bugfix on 0.2.3.6-alpha. Reported by "some guy from France".
5554 - Fix a possible crash bug when checking for deactivated circuits
5555 in connection_or_flush_from_first_active_circuit(). Fixes bug 6341;
5556 bugfix on 0.2.2.7-alpha. Bug report and fix received pseudonymously.
5558 o Minor bugfixes (on 0.2.3.x):
5559 - Fix two cases in src/or/transports.c where we were calling
5560 fmt_addr() twice in a parameter list. Bug found by David
5561 Fifield. Fixes bug 7014; bugfix on 0.2.3.9-alpha.
5562 - Convert an assert in the pathbias code to a log message. The assert
5563 appears to only be triggerable by Tor2Web mode. Fixes bug 6866;
5564 bugfix on 0.2.3.17-beta.
5565 - Fix memory leaks whenever we logged any message about the "path
5566 bias" detection. Fixes bug 7022; bugfix on 0.2.3.21-rc.
5568 o Minor bugfixes (on 0.2.2.x and earlier):
5569 - Don't serve or accept v2 hidden service descriptors over a relay's
5570 DirPort. It's never correct to do so, and disabling it might
5571 make it more annoying to exploit any bugs that turn up in the
5572 descriptor-parsing code. Fixes bug 7149.
5573 - When relays refuse a "create" cell because their queue of pending
5574 create cells is too big (typically because their cpu can't keep up
5575 with the arrival rate), send back reason "resource limit" rather
5576 than reason "internal", so network measurement scripts can get a
5577 more accurate picture. Bugfix on 0.1.1.11-alpha; fixes bug 7037.
5578 - Correct file sizes when reading binary files on Cygwin, to avoid
5579 a bug where Tor would fail to read its state file. Fixes bug 6844;
5580 bugfix on 0.1.2.7-alpha.
5581 - Avoid undefined behavior when parsing the list of supported
5582 rendezvous/introduction protocols in a hidden service descriptor.
5583 Previously, Tor would have confused (as-yet-unused) protocol version
5584 numbers greater than 32 with lower ones on many platforms. Fixes
5585 bug 6827; bugfix on 0.2.0.10-alpha. Found by George Kadianakis.
5587 o Documentation fixes:
5588 - Clarify that hidden services are TCP only. Fixes bug 6024.
5591 Changes in version 0.2.4.3-alpha - 2012-09-22
5592 Tor 0.2.4.3-alpha fixes another opportunity for a remotely triggerable
5593 assertion, resumes letting relays test reachability of their DirPort,
5594 and cleans up a bunch of smaller bugs.
5597 - Fix an assertion failure in tor_timegm() that could be triggered
5598 by a badly formatted directory object. Bug found by fuzzing with
5599 Radamsa. Fixes bug 6811; bugfix on 0.2.0.20-rc.
5602 - Fix a possible crash bug when checking for deactivated circuits
5603 in connection_or_flush_from_first_active_circuit(). Fixes bug 6341;
5604 bugfix on 0.2.2.7-alpha. Bug report and fix received pseudonymously.
5605 - Allow routers to detect that their own DirPorts are running. When
5606 we removed support for versions_supports_begindir, we also
5607 accidentally removed the mechanism we used to self-test our
5608 DirPort. Diagnosed with help from kargig. Fixes bugs 6814 and 6815;
5609 bugfix on 0.2.4.2-alpha.
5611 o Security features:
5612 - Switch to a completely time-invariant approach for picking nodes
5613 weighted by bandwidth. Our old approach would run through the
5614 part of the loop after it had made its choice slightly slower
5615 than it ran through the part of the loop before it had made its
5616 choice. Addresses ticket 6538.
5617 - Disable the use of Guard nodes when in Tor2WebMode. Guard usage
5618 by tor2web clients allows hidden services to identify tor2web
5619 clients through their repeated selection of the same rendezvous
5620 and introduction point circuit endpoints (their guards). Resolves
5624 - Enable Tor to read configuration, state, and key information from
5625 a FIFO. Previously Tor would only read from files with a positive
5626 stat.st_size. Code from meejah; fixes bug 6044.
5629 - Correct file sizes when reading binary files on Cygwin, to avoid
5630 a bug where Tor would fail to read its state file. Fixes bug 6844;
5631 bugfix on 0.1.2.7-alpha.
5632 - Correctly handle votes with more than 31 flags. Fixes bug 6853;
5633 bugfix on 0.2.0.3-alpha.
5634 - When complaining about a client port on a public address, log
5635 which address we're complaining about. Fixes bug 4020; bugfix on
5636 0.2.3.3-alpha. Patch by Tom Fitzhenry.
5637 - Convert an assert in the pathbias code to a log message. The assert
5638 appears to only be triggerable by Tor2Web mode. Fixes bug 6866;
5639 bugfix on 0.2.3.17-beta.
5640 - Our new buildsystem was overzealous about rebuilding manpages: it
5641 would rebuild them all whenever any one of them changed. Now our
5642 dependency checking should be correct. Fixes bug 6843; bugfix on
5644 - Don't do reachability testing over IPv6 unless AuthDirPublishIPv6
5645 is set. Fixes bug 6880. Bugfix on 0.2.4.1-alpha.
5646 - Correct log printout about which address family is preferred
5647 when connecting to a bridge with both an IPv4 and IPv6 OR port.
5648 Fixes bug 6884; bugfix on 0.2.4.1-alpha.
5650 o Minor bugfixes (code cleanliness):
5651 - Fix round_to_power_of_2() so it doesn't invoke undefined behavior
5652 with large values. This situation was untriggered, but nevertheless
5653 incorrect. Fixes bug 6831; bugfix on 0.2.0.1-alpha.
5654 - Reject consensus votes with more than 64 known-flags. We aren't even
5655 close to that limit yet, and our code doesn't handle it correctly.
5656 Fixes bug 6833; bugfix on 0.2.0.1-alpha.
5657 - Avoid undefined behavior when parsing the list of supported
5658 rendezvous/introduction protocols in a hidden service descriptor.
5659 Previously, Tor would have confused (as-yet-unused) protocol version
5660 numbers greater than 32 with lower ones on many platforms. Fixes
5661 bug 6827; bugfix on 0.2.0.10-alpha. Found by George Kadianakis.
5662 - Fix handling of rendezvous client authorization types over 8.
5663 Fixes bug 6861; bugfix on 0.2.1.5-alpha.
5664 - Fix building with older versions of GCC (2.95, for one) that don't
5665 like preprocessor directives inside macro arguments. Found by
5666 grarpamp. Fixes bug 6842; bugfix on 0.2.4.2-alpha.
5667 - Switch weighted node selection rule from using a list of doubles
5668 to using a list of int64_t. This change should make the process
5669 slightly easier to debug and maintain. Needed to finish ticket 6538.
5671 o Code simplification and refactoring:
5672 - Move the generic "config" code into a new file, and have "config.c"
5673 hold only torrc- and state-related code. Resolves ticket 6823.
5674 - Move the core of our "choose a weighted element at random" logic
5675 into its own function, and give it unit tests. Now the logic is
5676 testable, and a little less fragile too.
5677 - Removed the testing_since field of node_t, which hasn't been used
5678 for anything since 0.2.0.9-alpha.
5680 o Documentation fixes:
5681 - Clarify that hidden services are TCP only. Fixes bug 6024.
5682 - Resolve a typo in torrc.sample.in. Fixes bug 6819; bugfix on
5686 Changes in version 0.2.3.22-rc - 2012-09-11
5687 Tor 0.2.3.22-rc fixes another opportunity for a remotely triggerable
5691 - Fix an assertion failure in tor_timegm() that could be triggered
5692 by a badly formatted directory object. Bug found by fuzzing with
5693 Radamsa. Fixes bug 6811; bugfix on 0.2.0.20-rc.
5696 - Avoid segfault when starting up having run with an extremely old
5697 version of Tor and parsing its state file. Fixes bug 6801; bugfix
5701 Changes in version 0.2.2.39 - 2012-09-11
5702 Tor 0.2.2.39 fixes two more opportunities for remotely triggerable
5706 - Fix an assertion failure in tor_timegm() that could be triggered
5707 by a badly formatted directory object. Bug found by fuzzing with
5708 Radamsa. Fixes bug 6811; bugfix on 0.2.0.20-rc.
5709 - Do not crash when comparing an address with port value 0 to an
5710 address policy. This bug could have been used to cause a remote
5711 assertion failure by or against directory authorities, or to
5712 allow some applications to crash clients. Fixes bug 6690; bugfix
5716 Changes in version 0.2.4.2-alpha - 2012-09-10
5717 Tor 0.2.4.2-alpha enables port forwarding for pluggable transports,
5718 raises the default rate limiting even more, and makes the bootstrapping
5719 log messages less noisy.
5722 - Automatically forward the TCP ports of pluggable transport
5723 proxies using tor-fw-helper if PortForwarding is enabled. Implements
5727 - Raise the default BandwidthRate/BandwidthBurst values from 5MB/10MB
5728 to 1GB/1GB. The previous defaults were intended to be "basically
5729 infinite", but it turns out they're now limiting our 100mbit+
5730 relays and bridges. Fixes bug 6605; bugfix on 0.2.0.10-alpha (the
5731 last time we raised it).
5734 - Detect when we're running with a version of OpenSSL other than the
5735 one we compiled with. This has occasionally given people hard-to-
5737 - Log fewer lines at level "notice" about our OpenSSL and Libevent
5738 versions and capabilities when everything is going right. Resolves
5739 part of ticket 6736.
5740 - Directory authorities no long accept descriptors for any version of
5741 Tor before 0.2.2.35, or for any 0.2.3 release before 0.2.3.10-alpha.
5742 These versions are insecure, unsupported, or both. Implements
5746 - Rename the (internal-use-only) UsingTestingNetworkDefaults option
5747 to start with a triple-underscore so the controller won't touch it.
5748 Patch by Meejah. Fixes bug 3155. Bugfix on 0.2.2.23-alpha.
5749 - Avoid segfault when starting up having run with an extremely old
5750 version of Tor and parsing its state file. Fixes bug 6801; bugfix
5752 - Rename the (testing-use-only) _UseFilteringSSLBufferevents option
5753 so it doesn't start with _. Fixes bug 3155. Bugfix on 0.2.3.1-alpha.
5754 - Don't follow the NULL pointer if microdescriptor generation fails.
5755 (This does not appear to be triggerable, but it's best to be safe.)
5756 Found by "f. tp.". Fixes bug 6797; bugfix on 0.2.4.1-alpha.
5757 - Fix mis-declared dependencies on src/common/crypto.c and
5758 src/or/tor_main.c that could break out-of-tree builds under some
5759 circumstances. Fixes bug 6778; bugfix on 0.2.4.1-alpha.
5760 - Avoid a warning when building common_sha1.i out of tree. Fixes bug
5761 6778; bugfix on 0.2.4.1-alpha.
5762 - Fix a harmless (in this case) build warning for implicitly
5763 converting a strlen() to an int. Bugfix on 0.2.4.1-alpha.
5766 - Now that all versions before 0.2.2.x are disallowed, we no longer
5767 need to work around their missing features. Thus we can remove a
5768 bunch of compatibility code.
5771 - Tweak tor-fw-helper to accept an arbitrary amount of arbitrary
5772 TCP ports to forward. In the past it only accepted two ports:
5773 the ORPort and the DirPort.
5776 Changes in version 0.2.4.1-alpha - 2012-09-05
5777 Tor 0.2.4.1-alpha lets bridges publish their pluggable transports to
5778 bridgedb; lets relays use IPv6 addresses and directory authorities
5779 advertise them; and switches to a cleaner build interface.
5781 This is the first alpha release in a new series, so expect there to
5782 be bugs. Users who would rather test out a more stable branch should
5783 stay with 0.2.3.x for now.
5785 o Major features (bridges):
5786 - Bridges now report the pluggable transports they support to the
5787 bridge authority, so it can pass the supported transports on to
5788 bridgedb and/or eventually do reachability testing. Implements
5791 o Major features (IPv6):
5792 - Bridge authorities now accept IPv6 bridge addresses and include
5793 them in network status documents. Implements ticket 5534.
5794 - Clients who set "ClientUseIPv6 1" may connect to entry nodes over
5795 IPv6. Set "ClientPreferIPv6ORPort 1" to make this even more likely
5796 to happen. Implements ticket 5535.
5797 - All kind of relays, not just bridges, can now advertise an IPv6
5798 OR port. Implements ticket 6362.
5799 - Directory authorities vote on IPv6 OR ports using the new consensus
5800 method 14. Implements ticket 6363.
5802 o Major features (build):
5803 - Switch to a nonrecursive Makefile structure. Now instead of each
5804 Makefile.am invoking other Makefile.am's, there is a master
5805 Makefile.am that includes the others. This change makes our build
5806 process slightly more maintainable, and improves parallelism for
5807 building with make -j. Original patch by Stewart Smith; various
5808 fixes by Jim Meyering.
5809 - Where available, we now use automake's "silent" make rules by
5810 default, so that warnings are easier to spot. You can get the old
5811 behavior with "make V=1". Patch by Stewart Smith for ticket 6522.
5813 o Minor features (code security and spec conformance):
5814 - Clear keys and key-derived material left on the stack in
5815 rendservice.c and rendclient.c. Check return value of
5816 crypto_pk_write_private_key_to_string() in rend_service_load_keys().
5817 These fixes should make us more forward-secure against cold-boot
5818 attacks and the like. Fixes bug 2385.
5819 - Reject EXTEND cells sent to nonexistent streams. According to the
5820 spec, an EXTEND cell sent to _any_ nonzero stream ID is invalid, but
5821 we were only checking for stream IDs that were currently in use.
5822 Found while hunting for more instances of bug 6271. Bugfix on
5823 0.0.2pre8, which introduced incremental circuit construction.
5825 o Minor features (streamlining);
5826 - No longer include the "opt" prefix when generating routerinfos
5827 or v2 directories: it has been needless since Tor 0.1.2. Closes
5829 - Remove some now-needless code that tried to aggressively flush
5830 OR connections as data was added to them. Since 0.2.0.1-alpha, our
5831 cell queue logic has saved us from the failure mode that this code
5832 was supposed to prevent. Removing this code will limit the number
5833 of baroque control flow paths through Tor's network logic. Reported
5834 pseudonymously on IRC. Fixes bug 6468; bugfix on 0.2.0.1-alpha.
5836 o Minor features (controller):
5837 - Add a "GETINFO signal/names" control port command. Implements
5839 - Provide default values for all options via "GETINFO config/defaults".
5840 Implements ticket 4971.
5842 o Minor features (IPv6):
5843 - New config option "AuthDirHasIPv6Connectivity 1" that directory
5844 authorities should set if they have IPv6 connectivity and want to
5845 do reachability tests for IPv6 relays. Implements feature 5974.
5846 - A relay with an IPv6 OR port now sends that address in NETINFO
5847 cells (in addition to its other address). Implements ticket 6364.
5849 o Minor features (log messages):
5850 - Omit the first heartbeat log message, because it never has anything
5851 useful to say, and it clutters up the bootstrapping messages.
5852 Resolves ticket 6758.
5853 - Don't log about reloading the microdescriptor cache at startup. Our
5854 bootstrap warnings are supposed to tell the user when there's a
5855 problem, and our bootstrap notices say when there isn't. Resolves
5856 ticket 6759; bugfix on 0.2.2.6-alpha.
5857 - Don't log "I learned some more directory information" when we're
5858 reading cached directory information. Reserve it for when new
5859 directory information arrives in response to a fetch. Resolves
5861 - Prevent rounding error in path bias counts when scaling
5862 them down, and use the correct scale factor default. Also demote
5863 some path bias related log messages down a level and make others
5864 less scary sounding. Fixes bug 6647. Bugfix against 0.2.3.17-beta.
5865 - We no longer warn so much when generating manpages from their
5868 o Code simplifications and refactoring:
5869 - Enhance our internal sscanf replacement so that we can eliminate
5870 the last remaining uses of the system sscanf. (Though those uses
5871 of sscanf were safe, sscanf itself is generally error prone, so
5872 we want to eliminate when we can.) Fixes ticket 4195 and Coverity
5874 - Move ipv6_preferred from routerinfo_t to node_t. Addresses bug 4620.
5875 - Move last_reachable and testing_since from routerinfo_t to node_t.
5876 Implements ticket 5529.
5877 - Add replaycache_t structure, functions and unit tests, then refactor
5878 rend_service_introduce() to be more clear to read, improve, debug,
5879 and test. Resolves bug 6177.
5880 - Finally remove support for malloc_good_size and malloc_usable_size.
5881 We had hoped that these functions would let us eke a little more
5882 memory out of our malloc implementation. Unfortunately, the only
5883 implementations that provided these functions are also ones that
5884 are already efficient about not overallocation: they never got us
5885 more than 7 or so bytes per allocation. Removing them saves us a
5886 little code complexity and a nontrivial amount of build complexity.
5889 - Tor maintainers now require Automake version 1.9 or later to build
5890 Tor from the Git repository. (Automake is not required when building
5891 from a source distribution.)
5894 Changes in version 0.2.3.21-rc - 2012-09-05
5895 Tor 0.2.3.21-rc is the fourth release candidate for the Tor 0.2.3.x
5896 series. It fixes a trio of potential security bugs, fixes a bug where
5897 we were leaving some of the fast relays out of the microdescriptor
5898 consensus, resumes interpreting "ORPort 0" and "DirPort 0" correctly,
5899 and cleans up other smaller issues.
5901 o Major bugfixes (security):
5902 - Tear down the circuit if we get an unexpected SENDME cell. Clients
5903 could use this trick to make their circuits receive cells faster
5904 than our flow control would have allowed, or to gum up the network,
5905 or possibly to do targeted memory denial-of-service attacks on
5906 entry nodes. Fixes bug 6252. Bugfix on the 54th commit on Tor --
5907 from July 2002, before the release of Tor 0.0.0. We had committed
5908 this patch previously, but we had to revert it because of bug 6271.
5909 Now that 6271 is fixed, this patch appears to work.
5910 - Reject any attempt to extend to an internal address. Without
5911 this fix, a router could be used to probe addresses on an internal
5912 network to see whether they were accepting connections. Fixes bug
5913 6710; bugfix on 0.0.8pre1.
5914 - Do not crash when comparing an address with port value 0 to an
5915 address policy. This bug could have been used to cause a remote
5916 assertion failure by or against directory authorities, or to
5917 allow some applications to crash clients. Fixes bug 6690; bugfix
5921 - Remove the upper bound on microdescriptor length. We were hitting
5922 the limit for routers with complex exit policies or family
5923 declarations, causing clients to not use them. Fixes the first
5924 piece of bug 6404; fix on 0.2.2.6-alpha.
5925 - Detect "ORPort 0" as meaning, uniformly, that we're not running
5926 as a relay. Previously, some of our code would treat the presence
5927 of any ORPort line as meaning that we should act like a relay,
5928 even though our new listener code would correctly not open any
5929 ORPorts for ORPort 0. Similar bugs in other Port options are also
5930 fixed. Fixes the first half of bug 6507; bugfix on 0.2.3.3-alpha.
5933 - Avoid a pair of double-free and use-after-mark bugs that can
5934 occur with certain timings in canceled and re-received DNS
5935 requests. Fixes bug 6472; bugfix on 0.0.7rc1.
5936 - Fix build and 64-bit compile warnings from --enable-openbsd-malloc.
5937 Fixes bug 6379. Bugfix on 0.2.0.20-rc.
5938 - Allow one-hop directory fetching circuits the full "circuit build
5939 timeout" period, rather than just half of it, before failing them
5940 and marking the relay down. This fix should help reduce cases where
5941 clients declare relays (or worse, bridges) unreachable because
5942 the TLS handshake takes a few seconds to complete. Fixes bug 6743;
5943 bugfix on 0.2.2.2-alpha, where we changed the timeout from a static
5945 - Authorities no longer include any router in their microdescriptor
5946 consensuses for which they couldn't generate or agree on a
5947 microdescriptor. Fixes the second piece of bug 6404; fix on
5949 - Detect and reject attempts to specify both "FooPort" and
5950 "FooPort 0" in the same configuration domain. (It's still okay
5951 to have a FooPort in your configuration file, and use "FooPort 0"
5952 on the command line to disable it.) Fixes the second half of bug
5953 6507; bugfix on 0.2.3.3-alpha.
5954 - Make wildcarded addresses (that is, ones beginning with "*.") work
5955 when provided via the controller's MapAddress command. Previously,
5956 they were accepted, but we never actually noticed that they were
5957 wildcards. Fixes bug 6244; bugfix on 0.2.3.9-alpha.
5958 - Avoid crashing on a malformed state file where EntryGuardPathBias
5959 precedes EntryGuard. Fix for bug 6774; bugfix on 0.2.3.17-beta.
5960 - Add a (probably redundant) memory clear between iterations of
5961 the router status voting loop, to prevent future coding errors
5962 where data might leak between iterations of the loop. Resolves
5965 o Minor bugfixes (log messages):
5966 - Downgrade "set buildtimeout to low value" messages to "info"
5967 severity; they were never an actual problem, there was never
5968 anything reasonable to do about them, and they tended to spam logs
5969 from time to time. Fixes bug 6251; bugfix on 0.2.2.2-alpha.
5970 - Downgrade path-bias warning messages to "info". We'll try to get
5971 them working better in 0.2.4. Add internal circuit construction
5972 state to protect against the noisy warn message "Unexpectedly high
5973 circuit_successes". Also add some additional rate-limited notice
5974 messages to help determine the root cause of the warn. Fixes bug
5975 6475. Bugfix against 0.2.3.17-beta.
5976 - Move log message when unable to find a microdesc in a routerstatus
5977 entry to parse time. Previously we'd spam this warning every time
5978 we tried to figure out which microdescriptors to download. Fixes
5979 the third piece of bug 6404; fix on 0.2.3.18-rc.
5982 - Consider new, removed or changed IPv6 OR ports a non-cosmetic
5983 change when the authority is deciding whether to accept a newly
5984 uploaded descriptor. Implements ticket 6423.
5985 - Add missing documentation for consensus and microdesc files.
5986 Resolves ticket 6732.
5989 Changes in version 0.2.2.38 - 2012-08-12
5990 Tor 0.2.2.38 fixes a remotely triggerable crash bug, and fixes a timing
5991 attack that could in theory leak path information.
5994 - Avoid an uninitialized memory read when reading a vote or consensus
5995 document that has an unrecognized flavor name. This read could
5996 lead to a remote crash bug. Fixes bug 6530; bugfix on 0.2.2.6-alpha.
5997 - Try to leak less information about what relays a client is
5998 choosing to a side-channel attacker. Previously, a Tor client would
5999 stop iterating through the list of available relays as soon as it
6000 had chosen one, thus finishing a little earlier when it picked
6001 a router earlier in the list. If an attacker can recover this
6002 timing information (nontrivial but not proven to be impossible),
6003 they could learn some coarse-grained information about which relays
6004 a client was picking (middle nodes in particular are likelier to
6005 be affected than exits). The timing attack might be mitigated by
6006 other factors (see bug 6537 for some discussion), but it's best
6007 not to take chances. Fixes bug 6537; bugfix on 0.0.8rc1.
6010 Changes in version 0.2.3.20-rc - 2012-08-05
6011 Tor 0.2.3.20-rc is the third release candidate for the Tor 0.2.3.x
6012 series. It fixes a pair of code security bugs and a potential anonymity
6013 issue, updates our RPM spec files, and cleans up other smaller issues.
6016 - Avoid read-from-freed-memory and double-free bugs that could occur
6017 when a DNS request fails while launching it. Fixes bug 6480;
6018 bugfix on 0.2.0.1-alpha.
6019 - Avoid an uninitialized memory read when reading a vote or consensus
6020 document that has an unrecognized flavor name. This read could
6021 lead to a remote crash bug. Fixes bug 6530; bugfix on 0.2.2.6-alpha.
6022 - Try to leak less information about what relays a client is
6023 choosing to a side-channel attacker. Previously, a Tor client would
6024 stop iterating through the list of available relays as soon as it
6025 had chosen one, thus finishing a little earlier when it picked
6026 a router earlier in the list. If an attacker can recover this
6027 timing information (nontrivial but not proven to be impossible),
6028 they could learn some coarse-grained information about which relays
6029 a client was picking (middle nodes in particular are likelier to
6030 be affected than exits). The timing attack might be mitigated by
6031 other factors (see bug 6537 for some discussion), but it's best
6032 not to take chances. Fixes bug 6537; bugfix on 0.0.8rc1.
6035 - Try to make the warning when giving an obsolete SOCKSListenAddress
6036 a little more useful.
6037 - Terminate active server managed proxies if Tor stops being a
6038 relay. Addresses parts of bug 6274; bugfix on 0.2.3.6-alpha.
6039 - Provide a better error message about possible OSX Asciidoc failure
6040 reasons. Fixes bug 6436.
6041 - Warn when Tor is configured to use accounting in a way that can
6042 link a hidden service to some other hidden service or public
6043 address. Resolves ticket 6490.
6046 - Check return value of fputs() when writing authority certificate
6047 file. Fixes Coverity issue 709056; bugfix on 0.2.0.1-alpha.
6048 - Ignore ServerTransportPlugin lines when Tor is not configured as
6049 a relay. Fixes bug 6274; bugfix on 0.2.3.6-alpha.
6050 - When disabling guards for having too high a proportion of failed
6051 circuits, make sure to look at each guard. Fixes bug 6397; bugfix
6055 - Update our default RPM spec files to work with mock and rpmbuild
6056 on RHEL/Fedora. They have an updated set of dependencies and
6057 conflicts, a fix for an ancient typo when creating the "_tor"
6058 user, and better instructions. Thanks to Ondrej Mikle for the
6059 patch series. Fixes bug 6043.
6062 - Make it possible to set the TestingTorNetwork configuration
6063 option using AlternateDirAuthority and AlternateBridgeAuthority
6064 as an alternative to setting DirServer. Addresses ticket 6377.
6067 - Clarify the documentation for the Alternate*Authority options.
6069 - Fix some typos in the manpages. Patch from A. Costa. Fixes bug 6500.
6071 o Code simplification and refactoring:
6072 - Do not use SMARTLIST_FOREACH for any loop whose body exceeds
6073 10 lines. Also, don't nest them. Doing so in the past has
6074 led to hard-to-debug code. The new style is to use the
6075 SMARTLIST_FOREACH_{BEGIN,END} pair. Addresses issue 6400.
6078 Changes in version 0.2.3.19-rc - 2012-07-06
6079 Tor 0.2.3.19-rc is the second release candidate for the Tor 0.2.3.x
6080 series. It fixes the compile on Windows, reverts to a GeoIP database
6081 that isn't as broken, and fixes a flow control bug that has been around
6082 since the beginning of Tor.
6085 - Fix a bug handling SENDME cells on nonexistent streams that could
6086 result in bizarre window values. Report and patch contributed
6087 pseudonymously. Fixes part of bug 6271. This bug was introduced
6088 before the first Tor release, in svn commit r152.
6089 - Revert to the May 1 2012 Maxmind GeoLite Country database. In the
6090 June 2012 database, Maxmind marked many Tor relays as country "A1",
6091 which will cause risky behavior for clients that set EntryNodes
6092 or ExitNodes. Addresses bug 6334; bugfix on 0.2.3.17-beta.
6093 - Instead of ENOBUFS on Windows, say WSAENOBUFS. Fixes compilation
6094 on Windows. Fixes bug 6296; bugfix on 0.2.3.18-rc.
6097 - Fix wrong TCP port range in parse_port_range(). Fixes bug 6218;
6098 bugfix on 0.2.1.10-alpha.
6101 Changes in version 0.2.3.18-rc - 2012-06-28
6102 Tor 0.2.3.18-rc is the first release candidate for the Tor 0.2.3.x
6103 series. It fixes a few smaller bugs, but generally appears stable.
6104 Please test it and let us know whether it is!
6107 - Allow wildcarded mapaddress targets to be specified on the
6108 controlport. Partially fixes bug 6244; bugfix on 0.2.3.9-alpha.
6109 - Make our linker option detection code more robust against linkers
6110 such as on FreeBSD 8, where a bad combination of options completes
6111 successfully but makes an unrunnable binary. Fixes bug 6173;
6112 bugfix on 0.2.3.17-beta.
6114 o Minor bugfixes (on 0.2.2.x and earlier):
6115 - Avoid a false positive in the util/threads unit test by increasing
6116 the maximum timeout time. Fixes bug 6227; bugfix on 0.2.0.4-alpha.
6117 - Replace "Sending publish request" log messages with "Launching
6118 upload", so that they no longer confusingly imply that we're
6119 sending something to a directory we might not even be connected
6120 to yet. Fixes bug 3311; bugfix on 0.2.0.10-alpha.
6121 - Make sure to set *socket_error in all error cases in
6122 connection_connect(), so it can't produce a warning about
6123 errno being zero from errno_to_orconn_end_reason(). Bugfix on
6124 0.2.1.1-alpha; resolves ticket 6028.
6125 - Downgrade "Got a certificate, but we already have it" log messages
6126 from warning to info, except when we're a dirauth. Fixes bug 5238;
6127 bugfix on 0.2.1.7-alpha.
6128 - When checking for requested signatures on the latest consensus
6129 before serving it to a client, make sure to check the right
6130 consensus flavor. Bugfix on 0.2.2.6-alpha.
6131 - Downgrade "eventdns rejected address" message to LOG_PROTOCOL_WARN.
6132 Fixes bug 5932; bugfix on 0.2.2.7-alpha.
6134 o Minor bugfixes (on 0.2.3.x):
6135 - Make format_helper_exit_status() avoid unnecessary space padding
6136 and stop confusing log_from_pipe(). Fixes ticket 5557; bugfix
6138 - Downgrade a message about cleaning the microdescriptor cache to
6139 "info" from "notice". Fixes bug 6238; bugfix on 0.2.3.1-alpha.
6140 - Log a BUG message at severity INFO if we have a networkstatus with
6141 a missing entry for some microdescriptor. Continues on a patch
6143 - Improve the log message when a managed proxy fails to launch. Fixes
6144 bug 5099; bugfix on 0.2.3.6-alpha.
6145 - Don't do DNS lookups when parsing corrupted managed proxy protocol
6146 messages. Fixes bug 6226; bugfix on 0.2.3.6-alpha.
6147 - When formatting wildcarded address mappings for the controller,
6148 be sure to include "*." as appropriate. Partially fixes bug 6244;
6149 bugfix on 0.2.3.9-alpha.
6150 - Avoid a warning caused by using strcspn() from glibc with clang 3.0.
6151 Bugfix on 0.2.3.13-alpha.
6152 - Stop logging messages about running with circuit timeout learning
6153 enabled at severity LD_BUG. Fixes bug 6169; bugfix on 0.2.3.17-beta.
6154 - Disable a spurious warning about reading on a marked and flushing
6155 connection. We shouldn't be doing that, but apparently we
6156 sometimes do. Fixes bug 6203; bugfix on 0.2.3.17-beta.
6157 - Fix a bug that stopped AllowDotExit from working on addresses
6158 that had an entry in the DNS cache. Fixes bug 6211; bugfix on
6161 o Code simplification, refactoring, unit tests:
6162 - Move tor_gettimeofday_cached() into compat_libevent.c, and use
6163 Libevent's notion of cached time when possible.
6164 - Remove duplicate code for invoking getrlimit() from control.c.
6165 - Add a unit test for the environment_variable_names_equal function.
6168 - Document the --defaults-torrc option, and the new (in 0.2.3)
6169 semantics for overriding, extending, and clearing lists of
6170 options. Closes bug 4748.
6173 Changes in version 0.2.3.17-beta - 2012-06-15
6174 Tor 0.2.3.17-beta enables compiler and linker hardening by default,
6175 gets our TLS handshake back on track for being able to blend in with
6176 Firefox, fixes a big bug in 0.2.3.16-alpha that broke Tor's interaction
6177 with Vidalia, and otherwise continues to get us closer to a release
6181 - Enable gcc and ld hardening by default. Resolves ticket 5210.
6182 - Update TLS cipher list to match Firefox 8 and later. Resolves
6184 - Implement the client side of proposal 198: remove support for
6185 clients falsely claiming to support standard ciphersuites that
6186 they can actually provide. As of modern OpenSSL versions, it's not
6187 necessary to fake any standard ciphersuite, and doing so prevents
6188 us from using better ciphersuites in the future, since servers
6189 can't know whether an advertised ciphersuite is really supported or
6190 not. Some hosts -- notably, ones with very old versions of OpenSSL
6191 or where OpenSSL has been built with ECC disabled -- will stand
6192 out because of this change; TBB users should not be affected.
6195 - Change the default value for DynamicDHGroups (introduced in
6196 0.2.3.9-alpha) to 0. This feature can make Tor relays less
6197 identifiable by their use of the mod_ssl DH group, but at
6198 the cost of some usability (#4721) and bridge tracing (#6087)
6199 regressions. Resolves ticket 5598.
6200 - Send a CRLF at the end of each STATUS_* control protocol event. This
6201 bug tickled a bug in Vidalia which would make it freeze. Fixes
6202 bug 6094; bugfix on 0.2.3.16-alpha.
6205 - Disable writing on marked-for-close connections when they are
6206 blocked on bandwidth, to prevent busy-looping in Libevent. Fixes
6207 bug 5263; bugfix on 0.0.2pre13, where we first added a special
6208 case for flushing marked connections.
6209 - Detect SSL handshake even when the initial attempt to write the
6210 server hello fails. Fixes bug 4592; bugfix on 0.2.0.13-alpha.
6211 - Change the AllowDotExit rules so they should actually work.
6212 We now enforce AllowDotExit only immediately after receiving an
6213 address via SOCKS or DNSPort: other sources are free to provide
6214 .exit addresses after the resolution occurs. Fixes bug 3940;
6215 bugfix on 0.2.2.1-alpha.
6216 - Fix a (harmless) integer overflow in cell statistics reported by
6217 some fast relays. Fixes bug 5849; bugfix on 0.2.2.1-alpha.
6218 - Make sure circuitbuild.c checks LearnCircuitBuildTimeout in all the
6219 right places and never depends on the consensus parameters or
6220 computes adaptive timeouts when it is disabled. Fixes bug 5049;
6221 bugfix on 0.2.2.14-alpha.
6222 - When building Tor on Windows with -DUNICODE (not default), ensure
6223 that error messages, filenames, and DNS server names are always
6224 NUL-terminated when we convert them to a single-byte encoding.
6225 Fixes bug 5909; bugfix on 0.2.2.16-alpha.
6226 - Make Tor build correctly again with -DUNICODE -D_UNICODE defined.
6227 Fixes bug 6097; bugfix on 0.2.2.16-alpha.
6228 - Fix an edge case where TestingTorNetwork is set but the authorities
6229 and relays all have an uptime of zero, where the private Tor network
6230 could briefly lack support for hidden services. Fixes bug 3886;
6231 bugfix on 0.2.2.18-alpha.
6232 - Correct the manpage's descriptions for the default values of
6233 DirReqStatistics and ExtraInfoStatistics. Fixes bug 2865; bugfix
6235 - Fix the documentation for the --hush and --quiet command line
6236 options, which changed their behavior back in 0.2.3.3-alpha.
6237 - Fix compilation warning with clang 3.1. Fixes bug 6141; bugfix on
6241 - Rate-limit the "Weighted bandwidth is 0.000000" message, and add
6242 more information to it, so that we can track it down in case it
6243 returns again. Mitigates bug 5235.
6244 - Check CircuitBuildTimeout and LearnCircuitBuildTimeout in
6245 options_validate(); warn if LearnCircuitBuildTimeout is disabled and
6246 CircuitBuildTimeout is set unreasonably low. Resolves ticket 5452.
6247 - Warn the user when HTTPProxy, but no other proxy type, is
6248 configured. This can cause surprising behavior: it doesn't send
6249 all of Tor's traffic over the HTTPProxy -- it sends unencrypted
6250 directory traffic only. Resolves ticket 4663.
6251 - Issue a notice if a guard completes less than 40% of your circuits.
6252 Threshold is configurable by torrc option PathBiasNoticeRate and
6253 consensus parameter pb_noticepct. There is additional, off-by-
6254 default code to disable guards which fail too many circuits.
6255 Addresses ticket 5458.
6256 - Update to the June 6 2012 Maxmind GeoLite Country database.
6258 o Code simplifications and refactoring:
6259 - Remove validate_pluggable_transports_config(): its warning
6260 message is now handled by connection_or_connect().
6263 Changes in version 0.2.2.37 - 2012-06-06
6264 Tor 0.2.2.37 introduces a workaround for a critical renegotiation
6265 bug in OpenSSL 1.0.1 (where 20% of the Tor network can't talk to itself
6269 - Work around a bug in OpenSSL that broke renegotiation with TLS
6270 1.1 and TLS 1.2. Without this workaround, all attempts to speak
6271 the v2 Tor connection protocol when both sides were using OpenSSL
6272 1.0.1 would fail. Resolves ticket 6033.
6273 - When waiting for a client to renegotiate, don't allow it to add
6274 any bytes to the input buffer. This fixes a potential DoS issue.
6275 Fixes bugs 5934 and 6007; bugfix on 0.2.0.20-rc.
6276 - Fix an edge case where if we fetch or publish a hidden service
6277 descriptor, we might build a 4-hop circuit and then use that circuit
6278 for exiting afterwards -- even if the new last hop doesn't obey our
6279 ExitNodes config option. Fixes bug 5283; bugfix on 0.2.0.10-alpha.
6282 - Fix a build warning with Clang 3.1 related to our use of vasprintf.
6283 Fixes bug 5969. Bugfix on 0.2.2.11-alpha.
6286 - Tell GCC and Clang to check for any errors in format strings passed
6287 to the tor_v*(print|scan)f functions.
6290 Changes in version 0.2.3.16-alpha - 2012-06-05
6291 Tor 0.2.3.16-alpha introduces a workaround for a critical renegotiation
6292 bug in OpenSSL 1.0.1 (where 20% of the Tor network can't talk to itself
6293 currently). It also fixes a variety of smaller bugs and other cleanups
6294 that get us closer to a release candidate.
6296 o Major bugfixes (general):
6297 - Work around a bug in OpenSSL that broke renegotiation with TLS
6298 1.1 and TLS 1.2. Without this workaround, all attempts to speak
6299 the v2 Tor connection protocol when both sides were using OpenSSL
6300 1.0.1 would fail. Resolves ticket 6033.
6301 - When waiting for a client to renegotiate, don't allow it to add
6302 any bytes to the input buffer. This fixes a potential DoS issue.
6303 Fixes bugs 5934 and 6007; bugfix on 0.2.0.20-rc.
6304 - Pass correct OR address to managed proxies (like obfsproxy),
6305 even when ORListenAddress is used. Fixes bug 4865; bugfix on
6307 - The advertised platform of a router now includes only its operating
6308 system's name (e.g., "Linux", "Darwin", "Windows 7"), and not its
6309 service pack level (for Windows) or its CPU architecture (for Unix).
6310 We also no longer include the "git-XYZ" tag in the version. Resolves
6313 o Major bugfixes (clients):
6314 - If we are unable to find any exit that supports our predicted ports,
6315 stop calling them predicted, so that we don't loop and build
6316 hopeless circuits indefinitely. Fixes bug 3296; bugfix on 0.0.9pre6,
6317 which introduced predicted ports.
6318 - Fix an edge case where if we fetch or publish a hidden service
6319 descriptor, we might build a 4-hop circuit and then use that circuit
6320 for exiting afterwards -- even if the new last hop doesn't obey our
6321 ExitNodes config option. Fixes bug 5283; bugfix on 0.2.0.10-alpha.
6322 - Check at each new consensus whether our entry guards were picked
6323 long enough ago that we should rotate them. Previously, we only
6324 did this check at startup, which could lead to us holding a guard
6325 indefinitely. Fixes bug 5380; bugfix on 0.2.1.14-rc.
6326 - When fetching a bridge descriptor from a bridge authority,
6327 always do so anonymously, whether we have been able to open
6328 circuits or not. Partial fix for bug 1938; bugfix on 0.2.0.7-alpha.
6329 This behavior makes it *safer* to use UpdateBridgesFromAuthority,
6330 but we'll need to wait for bug 6010 before it's actually usable.
6332 o Major bugfixes (directory authorities):
6333 - When computing weight parameters, behave more robustly in the
6334 presence of a bad bwweightscale value. Previously, the authorities
6335 would crash if they agreed on a sufficiently broken weight_scale
6336 value: now, they use a reasonable default and carry on. Partial
6337 fix for 5786; bugfix on 0.2.2.17-alpha.
6338 - Check more thoroughly to prevent a rogue authority from
6339 double-voting on any consensus directory parameter. Previously,
6340 authorities would crash in this case if the total number of
6341 votes for any parameter exceeded the number of active voters,
6342 but would let it pass otherwise. Partial fix for bug 5786; bugfix
6346 - Rate-limit log messages when asked to connect anonymously to
6347 a private address. When these hit, they tended to hit fast and
6348 often. Also, don't bother trying to connect to addresses that we
6349 are sure will resolve to 127.0.0.1: getting 127.0.0.1 in a directory
6350 reply makes us think we have been lied to, even when the address the
6351 client tried to connect to was "localhost." Resolves ticket 2822.
6352 - Allow packagers to insert an extra string in server descriptor
6353 platform lines by setting the preprocessor variable TOR_BUILD_TAG.
6354 Resolves the rest of ticket 2988.
6355 - Raise the threshold of server descriptors needed (75%) and exit
6356 server descriptors needed (50%) before we will declare ourselves
6357 bootstrapped. This will make clients start building circuits a
6358 little later, but makes the initially constructed circuits less
6359 skewed and less in conflict with further directory fetches. Fixes
6361 - Close any connection that sends unrecognized junk before the
6362 handshake. Solves an issue noted in bug 4369.
6363 - Improve log messages about managed transports. Resolves ticket 5070.
6364 - Tag a bridge's descriptor as "never to be sent unencrypted".
6365 This shouldn't matter, since bridges don't open non-anonymous
6366 connections to the bridge authority and don't allow unencrypted
6367 directory connections from clients, but we might as well make
6368 sure. Closes bug 5139.
6369 - Expose our view of whether we have gone dormant to the controller,
6370 via a new "GETINFO dormant" value. Torbutton and other controllers
6371 can use this to avoid doing periodic requests through Tor while
6372 it's dormant (bug 4718). Fixes bug 5954.
6373 - Tell GCC and Clang to check for any errors in format strings passed
6374 to the tor_v*(print|scan)f functions.
6375 - Update to the May 1 2012 Maxmind GeoLite Country database.
6377 o Minor bugfixes (already included in 0.2.2.36):
6378 - Reject out-of-range times like 23:59:61 in parse_rfc1123_time().
6379 Fixes bug 5346; bugfix on 0.0.8pre3.
6380 - Correct parsing of certain date types in parse_http_time().
6381 Without this patch, If-Modified-Since would behave
6382 incorrectly. Fixes bug 5346; bugfix on 0.2.0.2-alpha. Patch from
6383 Esteban Manchado Velázques.
6384 - Make our number-parsing functions always treat too-large values
6385 as an error, even when those values exceed the width of the
6386 underlying type. Previously, if the caller provided these
6387 functions with minima or maxima set to the extreme values of the
6388 underlying integer type, these functions would return those
6389 values on overflow rather than treating overflow as an error.
6390 Fixes part of bug 5786; bugfix on 0.0.9.
6391 - If we hit the error case where routerlist_insert() replaces an
6392 existing (old) server descriptor, make sure to remove that
6393 server descriptor from the old_routers list. Fix related to bug
6394 1776. Bugfix on 0.2.2.18-alpha.
6395 - Clarify the behavior of MaxCircuitDirtiness with hidden service
6396 circuits. Fixes issue 5259.
6398 o Minor bugfixes (coding cleanup, on 0.2.2.x and earlier):
6399 - Prevent a null-pointer dereference when receiving a data cell
6400 for a nonexistent stream when the circuit in question has an
6401 empty deliver window. We don't believe this is triggerable,
6402 since we don't currently allow deliver windows to become empty,
6403 but the logic is tricky enough that it's better to make the code
6404 robust. Fixes bug 5541; bugfix on 0.0.2pre14.
6405 - Fix a memory leak when trying to launch a DNS request when the
6406 network is disabled or the nameservers are unconfigurable. Fixes
6407 bug 5916; bugfix on Tor 0.1.2.1-alpha (for the unconfigurable
6408 nameserver case) and on 0.2.3.9-alpha (for the DisableNetwork case).
6409 - Don't hold a Windows file handle open for every file mapping;
6410 the file mapping handle is sufficient. Fixes bug 5951; bugfix on
6412 - Avoid O(n^2) performance characteristics when parsing a large
6413 extrainfo cache. Fixes bug 5828; bugfix on 0.2.0.1-alpha.
6414 - Format more doubles with %f, not %lf. Patch from grarpamp to make
6415 Tor build correctly on older BSDs again. Fixes bug 3894; bugfix on
6417 - Make our replacement implementation of strtok_r() compatible with
6418 the standard behavior of strtok_r(). Patch by nils. Fixes bug 5091;
6419 bugfix on 0.2.2.1-alpha.
6420 - Fix a NULL-pointer dereference on a badly formed
6421 SETCIRCUITPURPOSE command. Found by mikeyc. Fixes bug 5796;
6422 bugfix on 0.2.2.9-alpha.
6423 - Fix a build warning with Clang 3.1 related to our use of vasprintf.
6424 Fixes bug 5969. Bugfix on 0.2.2.11-alpha.
6425 - Defensively refactor rend_mid_rendezvous() so that protocol
6426 violations and length checks happen in the beginning. Fixes
6428 - Set _WIN32_WINNT to 0x0501 consistently throughout the code, so
6429 that IPv6 stuff will compile on MSVC, and compilation issues
6430 will be easier to track down. Fixes bug 5861.
6432 o Minor bugfixes (correctness, on 0.2.2.x and earlier):
6433 - Exit nodes now correctly report EADDRINUSE and EADDRNOTAVAIL as
6434 resource exhaustion, so that clients can adjust their load to
6435 try other exits. Fixes bug 4710; bugfix on 0.1.0.1-rc, which
6436 started using END_STREAM_REASON_RESOURCELIMIT.
6437 - Don't check for whether the address we're using for outbound
6438 connections has changed until after the outbound connection has
6439 completed. On Windows, getsockname() doesn't succeed until the
6440 connection is finished. Fixes bug 5374; bugfix on 0.1.1.14-alpha.
6441 - If the configuration tries to set MyFamily on a bridge, refuse to
6442 do so, and warn about the security implications. Fixes bug 4657;
6443 bugfix on 0.2.0.3-alpha.
6444 - If the client fails to set a reasonable set of ciphersuites
6445 during its v2 handshake renegotiation, allow the renegotiation to
6446 continue nevertheless (i.e. send all the required certificates).
6447 Fixes bug 4591; bugfix on 0.2.0.20-rc.
6448 - When we receive a SIGHUP and the controller __ReloadTorrcOnSIGHUP
6449 option is set to 0 (which Vidalia version 0.2.16 now does when
6450 a SAVECONF attempt fails), perform other actions that SIGHUP
6451 usually causes (like reopening the logs). Fixes bug 5095; bugfix
6453 - If we fail to write a microdescriptor to the disk cache, do not
6454 continue replacing the old microdescriptor file. Fixes bug 2954;
6455 bugfix on 0.2.2.6-alpha.
6456 - Exit nodes don't need to fetch certificates for authorities that
6457 they don't recognize; only directory authorities, bridges,
6458 and caches need to do that. Fixes part of bug 2297; bugfix on
6460 - Correctly handle checking the permissions on the parent
6461 directory of a control socket in the root directory. Bug found
6462 by Esteban Manchado Velázquez. Fixes bug 5089; bugfix on Tor
6464 - When told to add a bridge with the same digest as a preexisting
6465 bridge but a different addr:port, change the addr:port as
6466 requested. Previously we would not notice the change. Fixes half
6467 of bug 5603; fix on 0.2.2.26-beta.
6468 - End AUTHCHALLENGE error messages (in the control protocol) with
6469 a CRLF. Fixes bug 5760; bugfix on 0.2.2.36 and 0.2.3.13-alpha.
6471 o Minor bugfixes (on 0.2.3.x):
6472 - Turn an assertion (that the number of handshakes received as a
6473 server is not < 1) into a warning. Fixes bug 4873; bugfix on
6475 - Format IPv4 addresses correctly in ADDRMAP events. (Previously,
6476 we had reversed them when the answer was cached.) Fixes bug
6477 5723; bugfix on 0.2.3.1-alpha.
6478 - Work correctly on Linux systems with accept4 support advertised in
6479 their headers, but without accept4 support in the kernel. Fix
6480 by murb. Fixes bug 5762; bugfix on 0.2.3.1-alpha.
6481 - When told to add a bridge with the same addr:port as a preexisting
6482 bridge but a different transport, change the transport as
6483 requested. Previously we would not notice the change. Fixes half
6484 of bug 5603; fix on 0.2.3.2-alpha.
6485 - Avoid a "double-reply" warning when replying to a SOCKS request
6486 with a parse error. Patch from Fabian Keil. Fixes bug 4108;
6487 bugfix on 0.2.3.4-alpha.
6488 - Fix a bug where a bridge authority crashes if it has seen no
6489 directory requests when it's time to write statistics to disk.
6490 Fixes bug 5891; bugfix on 0.2.3.6-alpha. Also fixes bug 5508 in
6492 - Don't try to open non-control listeners when DisableNetwork is set.
6493 Previously, we'd open all listeners, then immediately close them.
6494 Fixes bug 5604; bugfix on 0.2.3.9-alpha.
6495 - Don't abort the managed proxy protocol if the managed proxy
6496 sends us an unrecognized line; ignore it instead. Fixes bug
6497 5910; bugfix on 0.2.3.9-alpha.
6498 - Fix a compile warning in crypto.c when compiling with clang 3.1.
6499 Fixes bug 5969, bugfix on 0.2.3.9-alpha.
6500 - Fix a compilation issue on GNU Hurd, which doesn't have PATH_MAX.
6501 Fixes bug 5355; bugfix on 0.2.3.11-alpha.
6502 - Remove bogus definition of "_WIN32" from src/win32/orconfig.h, to
6503 unbreak the MSVC build. Fixes bug 5858; bugfix on 0.2.3.12-alpha.
6504 - Resolve numerous small warnings and build issues with MSVC. Resolves
6507 o Documentation fixes:
6508 - Improve the manual's documentation for the NT Service command-line
6509 options. Addresses ticket 3964.
6510 - Clarify SessionGroup documentation slightly; resolves ticket 5437.
6511 - Document the changes to the ORPort and DirPort options, and the
6512 fact that {OR/Dir}ListenAddress is now unnecessary (and
6513 therefore deprecated). Resolves ticket 5597.
6516 - Remove the torrc.bridge file: we don't use it for anything, and
6517 it had become badly desynchronized from torrc.sample. Resolves
6521 Changes in version 0.2.2.36 - 2012-05-24
6522 Tor 0.2.2.36 updates the addresses for two of the eight directory
6523 authorities, fixes some potential anonymity and security issues,
6524 and fixes several crash bugs.
6526 Tor 0.2.1.x has reached its end-of-life. Those Tor versions have many
6527 known flaws, and nobody should be using them. You should upgrade. If
6528 you're using a Linux or BSD and its packages are obsolete, stop using
6529 those packages and upgrade anyway.
6531 o Directory authority changes:
6532 - Change IP address for maatuska (v3 directory authority).
6533 - Change IP address for ides (v3 directory authority), and rename
6537 - When building or running with any version of OpenSSL earlier
6538 than 0.9.8s or 1.0.0f, disable SSLv3 support. These OpenSSL
6539 versions have a bug (CVE-2011-4576) in which their block cipher
6540 padding includes uninitialized data, potentially leaking sensitive
6541 information to any peer with whom they make a SSLv3 connection. Tor
6542 does not use SSL v3 by default, but a hostile client or server
6543 could force an SSLv3 connection in order to gain information that
6544 they shouldn't have been able to get. The best solution here is to
6545 upgrade to OpenSSL 0.9.8s or 1.0.0f (or later). But when building
6546 or running with a non-upgraded OpenSSL, we disable SSLv3 entirely
6547 to make sure that the bug can't happen.
6548 - Never use a bridge or a controller-supplied node as an exit, even
6549 if its exit policy allows it. Found by wanoskarnet. Fixes bug
6550 5342. Bugfix on 0.1.1.15-rc (for controller-purpose descriptors)
6551 and 0.2.0.3-alpha (for bridge-purpose descriptors).
6552 - Only build circuits if we have a sufficient threshold of the total
6553 descriptors that are marked in the consensus with the "Exit"
6554 flag. This mitigates an attack proposed by wanoskarnet, in which
6555 all of a client's bridges collude to restrict the exit nodes that
6556 the client knows about. Fixes bug 5343.
6557 - Provide controllers with a safer way to implement the cookie
6558 authentication mechanism. With the old method, if another locally
6559 running program could convince a controller that it was the Tor
6560 process, then that program could trick the controller into telling
6561 it the contents of an arbitrary 32-byte file. The new "SAFECOOKIE"
6562 authentication method uses a challenge-response approach to prevent
6563 this attack. Fixes bug 5185; implements proposal 193.
6566 - Avoid logging uninitialized data when unable to decode a hidden
6567 service descriptor cookie. Fixes bug 5647; bugfix on 0.2.1.5-alpha.
6568 - Avoid a client-side assertion failure when receiving an INTRODUCE2
6569 cell on a general purpose circuit. Fixes bug 5644; bugfix on
6571 - Fix builds when the path to sed, openssl, or sha1sum contains
6572 spaces, which is pretty common on Windows. Fixes bug 5065; bugfix
6574 - Correct our replacements for the timeradd() and timersub() functions
6575 on platforms that lack them (for example, Windows). The timersub()
6576 function is used when expiring circuits, while timeradd() is
6577 currently unused. Bug report and patch by Vektor. Fixes bug 4778;
6578 bugfix on 0.2.2.24-alpha.
6579 - Fix the SOCKET_OK test that we use to tell when socket
6580 creation fails so that it works on Win64. Fixes part of bug 4533;
6581 bugfix on 0.2.2.29-beta. Bug found by wanoskarnet.
6584 - Reject out-of-range times like 23:59:61 in parse_rfc1123_time().
6585 Fixes bug 5346; bugfix on 0.0.8pre3.
6586 - Make our number-parsing functions always treat too-large values
6587 as an error, even when those values exceed the width of the
6588 underlying type. Previously, if the caller provided these
6589 functions with minima or maxima set to the extreme values of the
6590 underlying integer type, these functions would return those
6591 values on overflow rather than treating overflow as an error.
6592 Fixes part of bug 5786; bugfix on 0.0.9.
6593 - Older Linux kernels erroneously respond to strange nmap behavior
6594 by having accept() return successfully with a zero-length
6595 socket. When this happens, just close the connection. Previously,
6596 we would try harder to learn the remote address: but there was
6597 no such remote address to learn, and our method for trying to
6598 learn it was incorrect. Fixes bugs 1240, 4745, and 4747. Bugfix
6599 on 0.1.0.3-rc. Reported and diagnosed by "r1eo".
6600 - Correct parsing of certain date types in parse_http_time().
6601 Without this patch, If-Modified-Since would behave
6602 incorrectly. Fixes bug 5346; bugfix on 0.2.0.2-alpha. Patch from
6603 Esteban Manchado Velázques.
6604 - Change the BridgePassword feature (part of the "bridge community"
6605 design, which is not yet implemented) to use a time-independent
6606 comparison. The old behavior might have allowed an adversary
6607 to use timing to guess the BridgePassword value. Fixes bug 5543;
6608 bugfix on 0.2.0.14-alpha.
6609 - Detect and reject certain misformed escape sequences in
6610 configuration values. Previously, these values would cause us
6611 to crash if received in a torrc file or over an authenticated
6612 control port. Bug found by Esteban Manchado Velázquez, and
6613 independently by Robert Connolly from Matta Consulting who further
6614 noted that it allows a post-authentication heap overflow. Patch
6615 by Alexander Schrijver. Fixes bugs 5090 and 5402 (CVE 2012-1668);
6616 bugfix on 0.2.0.16-alpha.
6617 - Fix a compile warning when using the --enable-openbsd-malloc
6618 configure option. Fixes bug 5340; bugfix on 0.2.0.20-rc.
6619 - During configure, detect when we're building with clang version
6620 3.0 or lower and disable the -Wnormalized=id and -Woverride-init
6621 CFLAGS. clang doesn't support them yet.
6622 - When sending an HTTP/1.1 proxy request, include a Host header.
6623 Fixes bug 5593; bugfix on 0.2.2.1-alpha.
6624 - Fix a NULL-pointer dereference on a badly formed SETCIRCUITPURPOSE
6625 command. Found by mikeyc. Fixes bug 5796; bugfix on 0.2.2.9-alpha.
6626 - If we hit the error case where routerlist_insert() replaces an
6627 existing (old) server descriptor, make sure to remove that
6628 server descriptor from the old_routers list. Fix related to bug
6629 1776. Bugfix on 0.2.2.18-alpha.
6631 o Minor bugfixes (documentation and log messages):
6632 - Fix a typo in a log message in rend_service_rendezvous_has_opened().
6633 Fixes bug 4856; bugfix on Tor 0.0.6.
6634 - Update "ClientOnly" man page entry to explain that there isn't
6635 really any point to messing with it. Resolves ticket 5005.
6636 - Document the GiveGuardFlagTo_CVE_2011_2768_VulnerableRelays
6637 directory authority option (introduced in Tor 0.2.2.34).
6638 - Downgrade the "We're missing a certificate" message from notice
6639 to info: people kept mistaking it for a real problem, whereas it
6640 is seldom the problem even when we are failing to bootstrap. Fixes
6641 bug 5067; bugfix on 0.2.0.10-alpha.
6642 - Correctly spell "connect" in a log message on failure to create a
6643 controlsocket. Fixes bug 4803; bugfix on 0.2.2.26-beta.
6644 - Clarify the behavior of MaxCircuitDirtiness with hidden service
6645 circuits. Fixes issue 5259.
6648 - Directory authorities now reject versions of Tor older than
6649 0.2.1.30, and Tor versions between 0.2.2.1-alpha and 0.2.2.20-alpha
6650 inclusive. These versions accounted for only a small fraction of
6651 the Tor network, and have numerous known security issues. Resolves
6653 - Update to the May 1 2012 Maxmind GeoLite Country database.
6656 - When sending or relaying a RELAY_EARLY cell, we used to convert
6657 it to a RELAY cell if the connection was using the v1 link
6658 protocol. This was a workaround for older versions of Tor, which
6659 didn't handle RELAY_EARLY cells properly. Now that all supported
6660 versions can handle RELAY_EARLY cells, and now that we're enforcing
6661 the "no RELAY_EXTEND commands except in RELAY_EARLY cells" rule,
6662 remove this workaround. Addresses bug 4786.
6665 Changes in version 0.2.3.15-alpha - 2012-04-30
6666 Tor 0.2.3.15-alpha fixes a variety of smaller bugs, including making
6667 the development branch build on Windows again.
6669 o Minor bugfixes (on 0.2.2.x and earlier):
6670 - Make sure that there are no unhandled pending TLS errors before
6671 reading from a TLS stream. We had checks in 0.1.0.3-rc, but
6672 lost them in 0.1.0.5-rc when we refactored read_to_buf_tls().
6673 Bugfix on 0.1.0.5-rc; fixes bug 4528.
6674 - Fix an assert that directory authorities could trigger on sighup
6675 during some configuration state transitions. We now don't treat
6676 it as a fatal error when the new descriptor we just generated in
6677 init_keys() isn't accepted. Fixes bug 4438; bugfix on 0.2.1.9-alpha.
6678 - After we pick a directory mirror, we would refuse to use it if
6679 it's in our ExcludeExitNodes list, resulting in mysterious failures
6680 to bootstrap for people who just wanted to avoid exiting from
6681 certain locations. Fixes bug 5623; bugfix on 0.2.2.25-alpha.
6682 - When building with --enable-static-tor on OpenBSD, do not
6683 erroneously attempt to link -lrt. Fixes bug 5103.
6685 o Minor bugfixes (on 0.2.3.x):
6686 - When Tor is built with kernel headers from a recent (last few
6687 years) Linux kernel, do not fail to run on older (pre-2.6.28
6688 Linux kernels). Fixes bug 5112; bugfix on 0.2.3.1-alpha.
6689 - Fix cross-compilation issues with mingw. Bugfixes on 0.2.3.6-alpha
6691 - Fix compilation with miniupnpc version 1.6; patch from
6692 Anthony G. Basile. Fixes bug 5434; bugfix on 0.2.3.12-alpha.
6693 - Fix compilation with MSVC, which had defined MS_WINDOWS. Bugfix
6694 on 0.2.3.13-alpha; found and fixed by Gisle Vanem.
6695 - Fix compilation on platforms without unistd.h, or where environ
6696 is defined in stdlib.h. Fixes bug 5704; bugfix on 0.2.3.13-alpha.
6699 - Directory authorities are now a little more lenient at accepting
6700 older router descriptors, or newer router descriptors that don't
6701 make big changes. This should help ameliorate past and future
6702 issues where routers think they have uploaded valid descriptors,
6703 but the authorities don't think so. Fix for ticket 2479.
6704 - Make the code that clients use to detect an address change be
6705 IPv6-aware, so that it won't fill clients' logs with error
6706 messages when trying to get the IPv4 address of an IPv6
6707 connection. Implements ticket 5537.
6710 - Remove the GiveGuardFlagTo_CVE_2011_2768_VulnerableRelays option;
6711 authorities needed to use it for a while to keep the network working
6712 as people upgraded to 0.2.1.31, 0.2.2.34, or 0.2.3.6-alpha, but
6713 that was six months ago. As of now, it should no longer be needed
6717 Changes in version 0.2.3.14-alpha - 2012-04-23
6718 Tor 0.2.3.14-alpha fixes yet more bugs to get us closer to a release
6719 candidate. It also dramatically speeds up AES: fast relays should
6720 consider switching to the newer OpenSSL library.
6722 o Directory authority changes:
6723 - Change IP address for ides (v3 directory authority), and rename
6727 - Avoid logging uninitialized data when unable to decode a hidden
6728 service descriptor cookie. Fixes bug 5647; bugfix on 0.2.1.5-alpha.
6729 - Avoid a client-side assertion failure when receiving an INTRODUCE2
6730 cell on a general purpose circuit. Fixes bug 5644; bugfix on
6732 - If authorities are unable to get a v2 consensus document from other
6733 directory authorities, they no longer fall back to fetching
6734 them from regular directory caches. Fixes bug 5635; bugfix on
6735 0.2.2.26-beta, where routers stopped downloading v2 consensus
6737 - When we start a Tor client with a normal consensus already cached,
6738 be willing to download a microdescriptor consensus. Fixes bug 4011;
6739 fix on 0.2.3.1-alpha.
6741 o Major features (performance):
6742 - When built to use OpenSSL 1.0.1, and built for an x86 or x86_64
6743 instruction set, take advantage of OpenSSL's AESNI, bitsliced, or
6744 vectorized AES implementations as appropriate. These can be much,
6745 much faster than other AES implementations.
6747 o Minor bugfixes (0.2.2.x and earlier):
6748 - Don't launch more than 10 service-side introduction-point circuits
6749 for a hidden service in five minutes. Previously, we would consider
6750 launching more introduction-point circuits if at least one second
6751 had passed without any introduction-point circuits failing. Fixes
6752 bug 4607; bugfix on 0.0.7pre1.
6753 - Change the BridgePassword feature (part of the "bridge community"
6754 design, which is not yet implemented) to use a time-independent
6755 comparison. The old behavior might have allowed an adversary
6756 to use timing to guess the BridgePassword value. Fixes bug 5543;
6757 bugfix on 0.2.0.14-alpha.
6758 - Enforce correct return behavior of tor_vsscanf() when the '%%'
6759 pattern is used. Fixes bug 5558. Bugfix on 0.2.1.13.
6760 - When sending an HTTP/1.1 proxy request, include a Host header.
6761 Fixes bug 5593; bugfix on 0.2.2.1-alpha.
6762 - Don't log that we have "decided to publish new relay descriptor"
6763 unless we are actually publishing a descriptor. Fixes bug 3942;
6764 bugfix on 0.2.2.28-beta.
6766 o Minor bugfixes (0.2.3.x):
6767 - Fix a bug where a bridge authority crashes (on a failed assert)
6768 if it has seen no directory requests when it's time to write
6769 statistics to disk. Fixes bug 5508. Bugfix on 0.2.3.6-alpha.
6770 - Fix bug stomping on ORPort option NoListen and ignoring option
6771 NoAdvertise. Fixes bug 5151; bugfix on 0.2.3.9-alpha.
6772 - In the testsuite, provide a large enough buffer in the tor_sscanf
6773 unit test. Otherwise we'd overrun that buffer and crash during
6774 the unit tests. Found by weasel. Fixes bug 5449; bugfix on
6776 - Make sure we create the keys directory if it doesn't exist and we're
6777 about to store the dynamic Diffie-Hellman parameters. Fixes bug
6778 5572; bugfix on 0.2.3.13-alpha.
6779 - Fix a small memory leak when trying to decode incorrect base16
6780 authenticator during SAFECOOKIE authentication. Found by
6781 Coverity Scan. Fixes CID 507. Bugfix on 0.2.3.13-alpha.
6784 - Add more information to a log statement that might help track down
6785 bug 4091. If you're seeing "Bug: tor_addr_is_internal() called with a
6786 non-IP address" messages (or any Bug messages, for that matter!),
6787 please let us know about it.
6788 - Relays now understand an IPv6 address when they get one from a
6789 directory server. Resolves ticket 4875.
6790 - Resolve IPv6 addresses in bridge and entry statistics to country
6791 code "??" which means we at least count them. Resolves ticket 5053;
6792 improves on 0.2.3.9-alpha.
6793 - Update to the April 3 2012 Maxmind GeoLite Country database.
6794 - Begin a doc/state-contents.txt file to explain the contents of
6795 the Tor state file. Fixes bug 2987.
6797 o Default torrc changes:
6798 - Stop listing "socksport 9050" in torrc.sample. We open a socks
6799 port on 9050 by default anyway, so this should not change anything
6801 - Stop mentioning the deprecated *ListenAddress options in
6802 torrc.sample. Fixes bug 5438.
6803 - Document unit of bandwidth related options in sample torrc.
6807 - The "torify" script no longer supports the "tsocks" socksifier
6808 tool, since tsocks doesn't support DNS and UDP right for Tor.
6809 Everyone should be using torsocks instead. Fixes bugs 3530 and
6810 5180. Based on a patch by "ugh".
6813 - Change the symmetric cipher interface so that creating and
6814 initializing a stream cipher are no longer separate functions.
6815 - Remove all internal support for unpadded RSA. We never used it, and
6816 it would be a bad idea to start.
6819 Changes in version 0.2.3.13-alpha - 2012-03-26
6820 Tor 0.2.3.13-alpha fixes a variety of stability and correctness bugs
6821 in managed pluggable transports, as well as providing other cleanups
6822 that get us closer to a release candidate.
6824 o Directory authority changes:
6825 - Change IP address for maatuska (v3 directory authority).
6828 - Provide controllers with a safer way to implement the cookie
6829 authentication mechanism. With the old method, if another locally
6830 running program could convince a controller that it was the Tor
6831 process, then that program could trick the controller into telling
6832 it the contents of an arbitrary 32-byte file. The new "SAFECOOKIE"
6833 authentication method uses a challenge-response approach to prevent
6834 this attack. Fixes bug 5185, implements proposal 193.
6835 - Never use a bridge or a controller-supplied node as an exit, even
6836 if its exit policy allows it. Found by wanoskarnet. Fixes bug
6837 5342. Bugfix on 0.1.1.15-rc (for controller-purpose descriptors)
6838 and 0.2.0.3-alpha (for bridge-purpose descriptors).
6839 - Only build circuits if we have a sufficient threshold of the total
6840 descriptors that are marked in the consensus with the "Exit"
6841 flag. This mitigates an attack proposed by wanoskarnet, in which
6842 all of a client's bridges collude to restrict the exit nodes that
6843 the client knows about. Fixes bug 5343.
6845 o Major bugfixes (on Tor 0.2.3.x):
6846 - Avoid an assert when managed proxies like obfsproxy are configured,
6847 and we receive HUP signals or setconf attempts too rapidly. This
6848 situation happens most commonly when Vidalia tries to attach to
6849 Tor or tries to configure the Tor it's attached to. Fixes bug 5084;
6850 bugfix on 0.2.3.6-alpha.
6851 - Fix a relay-side pluggable transports bug where managed proxies were
6852 unreachable from the Internet, because Tor asked them to bind on
6853 localhost. Fixes bug 4725; bugfix on 0.2.3.9-alpha.
6854 - Stop discarding command-line arguments when TestingTorNetwork
6855 is set. Discovered by Kevin Bauer. Fixes bug 5373; bugfix on
6856 0.2.3.9-alpha, where task 4552 added support for two layers of
6858 - Resume allowing the unit tests to run in gdb. This was accidentally
6859 made impossible when the DisableDebuggerAttachment option was
6860 introduced. Fixes bug 5448; bugfix on 0.2.3.9-alpha.
6861 - Resume building with nat-pmp support. Fixes bug 4955; bugfix on
6862 0.2.3.11-alpha. Reported by Anthony G. Basile.
6864 o Minor bugfixes (on 0.2.2.x and earlier):
6865 - Ensure we don't cannibalize circuits that are longer than three hops
6866 already, so we don't end up making circuits with 5 or more
6867 hops. Patch contributed by wanoskarnet. Fixes bug 5231; bugfix on
6868 0.1.0.1-rc which introduced cannibalization.
6869 - Detect and reject certain misformed escape sequences in
6870 configuration values. Previously, these values would cause us
6871 to crash if received in a torrc file or over an authenticated
6872 control port. Bug found by Esteban Manchado Velázquez, and
6873 independently by Robert Connolly from Matta Consulting who further
6874 noted that it allows a post-authentication heap overflow. Patch
6875 by Alexander Schrijver. Fixes bugs 5090 and 5402 (CVE 2012-1668);
6876 bugfix on 0.2.0.16-alpha.
6877 - Fix a compile warning when using the --enable-openbsd-malloc
6878 configure option. Fixes bug 5340; bugfix on 0.2.0.20-rc.
6879 - Directory caches no longer refuse to clean out descriptors because
6880 of missing v2 networkstatus documents, unless they're configured
6881 to retrieve v2 networkstatus documents. Fixes bug 4838; bugfix on
6882 0.2.2.26-beta. Patch by Daniel Bryg.
6883 - Update to the latest version of the tinytest unit testing framework.
6884 This includes a couple of bugfixes that can be relevant for
6885 running forked unit tests on Windows, and removes all reserved
6888 o Minor bugfixes (on 0.2.3.x):
6889 - On a failed pipe() call, don't leak file descriptors. Fixes bug
6890 4296; bugfix on 0.2.3.1-alpha.
6891 - Spec conformance: on a v3 handshake, do not send a NETINFO cell
6892 until after we have received a CERTS cell. Fixes bug 4361; bugfix
6893 on 0.2.3.6-alpha. Patch by "frosty".
6894 - When binding to an IPv6 address, set the IPV6_V6ONLY socket
6895 option, so that the IP stack doesn't decide to use it for IPv4
6896 too. Fixes bug 4760; bugfix on 0.2.3.9-alpha.
6897 - Ensure that variables set in Tor's environment cannot override
6898 environment variables that Tor passes to a managed
6899 pluggable-transport proxy. Previously, Tor would pass every
6900 variable in its environment to managed proxies along with the new
6901 ones, in such a way that on many operating systems, the inherited
6902 environment variables would override those which Tor tried to
6903 explicitly set. Bugfix on 0.2.3.12-alpha for most Unixoid systems;
6904 bugfix on 0.2.3.9-alpha for Windows.
6907 - A wide variety of new unit tests by Esteban Manchado Velázquez.
6908 - Shorten links in the tor-exit-notice file. Patch by Christian Kujau.
6909 - Update to the March 6 2012 Maxmind GeoLite Country database.
6912 Changes in version 0.2.3.12-alpha - 2012-02-13
6913 Tor 0.2.3.12-alpha lets fast exit relays scale better, allows clients
6914 to use bridges that run Tor 0.2.2.x, and resolves several big bugs
6915 when Tor is configured to use a pluggable transport like obfsproxy.
6918 - Fix builds when the path to sed, openssl, or sha1sum contains
6919 spaces, which is pretty common on Windows. Fixes bug 5065; bugfix
6921 - Set the SO_REUSEADDR socket option before we call bind() on outgoing
6922 connections. This change should allow busy exit relays to stop
6923 running out of available sockets as quickly. Fixes bug 4950;
6924 bugfix on 0.2.2.26-beta.
6925 - Allow 0.2.3.x clients to use 0.2.2.x bridges. Previously the client
6926 would ask the bridge for microdescriptors, which are only supported
6927 in 0.2.3.x, and then fail to bootstrap when it didn't get the
6928 answers it wanted. Fixes bug 4013; bugfix on 0.2.3.2-alpha.
6929 - Properly set up obfsproxy's environment when in managed mode. The
6930 Tor Browser Bundle needs LD_LIBRARY_PATH to be passed to obfsproxy,
6931 and when you run your Tor as a daemon, there's no HOME. Fixes bugs
6932 5076 and 5082; bugfix on 0.2.3.6-alpha.
6935 - Use the dead_strip option when building Tor on OS X. This reduces
6936 binary size by almost 19% when linking openssl and libevent
6937 statically, which we do for Tor Browser Bundle.
6938 - Fix broken URLs in the sample torrc file, and tell readers about
6939 the OutboundBindAddress, ExitPolicyRejectPrivate, and
6940 PublishServerDescriptor options. Addresses bug 4652.
6941 - Update to the February 7 2012 Maxmind GeoLite Country database.
6944 - Downgrade the "We're missing a certificate" message from notice
6945 to info: people kept mistaking it for a real problem, whereas it
6946 is seldom the problem even when we are failing to bootstrap. Fixes
6947 bug 5067; bugfix on 0.2.0.10-alpha.
6948 - Don't put "TOR_PT_EXTENDED_SERVER_PORT=127.0.0.1:4200" in a
6949 managed pluggable transport server proxy's environment.
6950 Previously, we would put it there, even though Tor doesn't
6951 implement an 'extended server port' yet, and even though Tor
6952 almost certainly isn't listening at that address. For now, we set
6953 it to an empty string to avoid crashing older obfsproxies. Bugfix
6955 - Log the heartbeat message every HeartbeatPeriod seconds, not every
6956 HeartbeatPeriod + 1 seconds. Fixes bug 4942; bugfix on
6957 0.2.3.1-alpha. Bug reported by Scott Bennett.
6958 - Calculate absolute paths correctly on Windows. Fixes bug 4973;
6959 bugfix on 0.2.3.11-alpha.
6960 - Update "ClientOnly" man page entry to explain that there isn't
6961 really any point to messing with it. Resolves ticket 5005.
6962 - Use the correct CVE number for CVE-2011-4576 in our comments and
6963 log messages. Found by "fermenthor". Resolves bug 5066; bugfix on
6966 o Code simplifications and refactoring:
6967 - Use the _WIN32 macro throughout our code to detect Windows.
6968 (Previously we had used the obsolete 'WIN32' and the idiosyncratic
6972 Changes in version 0.2.3.11-alpha - 2012-01-22
6973 Tor 0.2.3.11-alpha marks feature-freeze for the 0.2.3 tree. It deploys
6974 the last step of the plan to limit maximum circuit length, includes
6975 a wide variety of hidden service performance and correctness fixes,
6976 works around an OpenSSL security flaw if your distro is too stubborn
6977 to upgrade, and fixes a bunch of smaller issues.
6980 - Now that Tor 0.2.0.x is completely deprecated, enable the final
6981 part of "Proposal 110: Avoiding infinite length circuits" by
6982 refusing all circuit-extend requests that do not use a relay_early
6983 cell. This change helps Tor resist a class of denial-of-service
6984 attacks by limiting the maximum circuit length.
6985 - Adjust the number of introduction points that a hidden service
6986 will try to maintain based on how long its introduction points
6987 remain in use and how many introductions they handle. Fixes
6989 - Try to use system facilities for enumerating local interface
6990 addresses, before falling back to our old approach (which was
6991 binding a UDP socket, and calling getsockname() on it). That
6992 approach was scaring OS X users whose draconian firewall
6993 software warned about binding to UDP sockets, regardless of
6994 whether packets were sent. Now we try to use getifaddrs(),
6995 SIOCGIFCONF, or GetAdaptersAddresses(), depending on what the
6996 system supports. Resolves ticket 1827.
6998 o Major security workaround:
6999 - When building or running with any version of OpenSSL earlier
7000 than 0.9.8s or 1.0.0f, disable SSLv3 support. These OpenSSL
7001 versions have a bug (CVE-2011-4576) in which their block cipher
7002 padding includes uninitialized data, potentially leaking sensitive
7003 information to any peer with whom they make a SSLv3 connection. Tor
7004 does not use SSL v3 by default, but a hostile client or server
7005 could force an SSLv3 connection in order to gain information that
7006 they shouldn't have been able to get. The best solution here is to
7007 upgrade to OpenSSL 0.9.8s or 1.0.0f (or later). But when building
7008 or running with a non-upgraded OpenSSL, we disable SSLv3 entirely
7009 to make sure that the bug can't happen.
7012 - Fix the SOCKET_OK test that we use to tell when socket
7013 creation fails so that it works on Win64. Fixes part of bug 4533;
7014 bugfix on 0.2.2.29-beta. Bug found by wanoskarnet.
7015 - Correct our replacements for the timeradd() and timersub() functions
7016 on platforms that lack them (for example, Windows). The timersub()
7017 function is used when expiring circuits, while timeradd() is
7018 currently unused. Bug report and patch by Vektor. Fixes bug 4778;
7019 bugfix on 0.2.2.24-alpha and 0.2.3.1-alpha.
7020 - Do not use OpenSSL 1.0.0's counter mode: it has a critical bug
7021 that was fixed in OpenSSL 1.0.0a. We test for the counter mode
7022 bug at runtime, not compile time, because some distributions hack
7023 their OpenSSL to mis-report its version. Fixes bug 4779; bugfix
7024 on 0.2.3.9-alpha. Found by Pascal.
7026 o Minor features (controller):
7027 - Use absolute path names when reporting the torrc filename in the
7028 control protocol, so a controller can more easily find the torrc
7029 file. Resolves bug 1101.
7030 - Extend the control protocol to report flags that control a circuit's
7031 path selection in CIRC events and in replies to 'GETINFO
7032 circuit-status'. Implements part of ticket 2411.
7033 - Extend the control protocol to report the hidden service address
7034 and current state of a hidden-service-related circuit in CIRC
7035 events and in replies to 'GETINFO circuit-status'. Implements part
7037 - When reporting the path to the cookie file to the controller,
7038 give an absolute path. Resolves ticket 4881.
7039 - Allow controllers to request an event notification whenever a
7040 circuit is cannibalized or its purpose is changed. Implements
7041 part of ticket 3457.
7042 - Include the creation time of a circuit in CIRC and CIRC2
7043 control-port events and the list produced by the 'GETINFO
7044 circuit-status' control-port command.
7046 o Minor features (directory authorities):
7047 - Directory authorities now reject versions of Tor older than
7048 0.2.1.30, and Tor versions between 0.2.2.1-alpha and 0.2.2.20-alpha
7049 inclusive. These versions accounted for only a small fraction of
7050 the Tor network, and have numerous known security issues. Resolves
7052 - Authority operators can now vote for all relays in a given
7053 set of countries to be BadDir/BadExit/Invalid/Rejected.
7054 - Provide two consensus parameters (FastFlagMinThreshold and
7055 FastFlagMaxThreshold) to control the range of allowable bandwidths
7056 for the Fast directory flag. These allow authorities to run
7057 experiments on appropriate requirements for being a "Fast" node.
7058 The AuthDirFastGuarantee config value still applies. Implements
7060 - Document the GiveGuardFlagTo_CVE_2011_2768_VulnerableRelays
7061 directory authority option (introduced in Tor 0.2.2.34).
7063 o Minor features (other):
7064 - Don't disable the DirPort when we cannot exceed our AccountingMax
7065 limit during this interval because the effective bandwidthrate is
7066 low enough. This is useful in a situation where AccountMax is only
7067 used as an additional safeguard or to provide statistics.
7068 - Prepend an informative header to generated dynamic_dh_params files.
7069 - If EntryNodes are given, but UseEntryGuards is set to 0, warn that
7070 EntryNodes will have no effect. Resolves issue 2571.
7071 - Log more useful messages when we fail to disable debugger
7073 - Log which authority we're missing votes from when we go to fetch
7074 them from the other auths.
7075 - Log (at debug level) whenever a circuit's purpose is changed.
7076 - Add missing documentation for the MaxClientCircuitsPending,
7077 UseMicrodescriptors, UserspaceIOCPBuffers, and
7078 _UseFilteringSSLBufferevents options, all introduced during
7080 - Update to the January 3 2012 Maxmind GeoLite Country database.
7082 o Minor bugfixes (hidden services):
7083 - Don't close hidden service client circuits which have almost
7084 finished connecting to their destination when they reach
7085 the normal circuit-build timeout. Previously, we would close
7086 introduction circuits which are waiting for an acknowledgement
7087 from the introduction point, and rendezvous circuits which have
7088 been specified in an INTRODUCE1 cell sent to a hidden service,
7089 after the normal CBT. Now, we mark them as 'timed out', and launch
7090 another rendezvous attempt in parallel. This behavior change can
7091 be disabled using the new CloseHSClientCircuitsImmediatelyOnTimeout
7092 option. Fixes part of bug 1297; bugfix on 0.2.2.2-alpha.
7093 - Don't close hidden-service-side rendezvous circuits when they
7094 reach the normal circuit-build timeout. This behavior change can
7095 be disabled using the new
7096 CloseHSServiceRendCircuitsImmediatelyOnTimeout option. Fixes the
7097 remaining part of bug 1297; bugfix on 0.2.2.2-alpha.
7098 - Make sure we never mark the wrong rendezvous circuit as having
7099 had its introduction cell acknowleged by the introduction-point
7100 relay. Previously, when we received an INTRODUCE_ACK cell on a
7101 client-side hidden-service introduction circuit, we might have
7102 marked a rendezvous circuit other than the one we specified in
7103 the INTRODUCE1 cell as INTRO_ACKED, which would have produced
7104 a warning message and interfered with the hidden service
7105 connection-establishment process. Fixes bug 4759; bugfix on
7106 0.2.3.3-alpha, when we added the stream-isolation feature which
7107 might cause Tor to open multiple rendezvous circuits for the same
7109 - Don't trigger an assertion failure when we mark a new client-side
7110 hidden-service introduction circuit for close during the process
7111 of creating it. Fixes bug 4796; bugfix on 0.2.3.6-alpha. Reported
7114 o Minor bugfixes (log messages):
7115 - Correctly spell "connect" in a log message on failure to create a
7116 controlsocket. Fixes bug 4803; bugfix on 0.2.2.26-beta and
7118 - Fix a typo in a log message in rend_service_rendezvous_has_opened().
7119 Fixes bug 4856; bugfix on Tor 0.0.6.
7120 - Fix the log message describing how we work around discovering
7121 that our version is the ill-fated OpenSSL 0.9.8l. Fixes bug
7122 4837; bugfix on 0.2.2.9-alpha.
7123 - When logging about a disallowed .exit name, do not also call it
7124 an "invalid onion address". Fixes bug 3325; bugfix on 0.2.2.9-alpha.
7126 o Minor bugfixes (build fixes):
7127 - During configure, detect when we're building with clang version
7128 3.0 or lower and disable the -Wnormalized=id and -Woverride-init
7129 CFLAGS. clang doesn't support them yet.
7130 - During configure, search for library containing cos function as
7131 libm lives in libcore on some platforms (BeOS/Haiku). Linking
7132 against libm was hard-coded before. Fixes the first part of bug
7133 4727; bugfix on 0.2.2.2-alpha. Patch and analysis by Martin Hebnes
7135 - Detect attempts to build Tor on (as yet hypothetical) versions
7136 of Windows where sizeof(intptr_t) != sizeof(SOCKET). Partial
7137 fix for bug 4533. Bugfix on 0.2.2.28-beta.
7138 - Preprocessor directives should not be put inside the arguments
7139 of a macro. This would break compilation with GCC releases prior
7140 to version 3.3. We would never recommend such an old GCC version,
7141 but it is apparently required for binary compatibility on some
7142 platforms (namely, certain builds of Haiku). Fixes the other part
7143 of bug 4727; bugfix on 0.2.3.3-alpha. Patch and analysis by Martin
7146 o Minor bugfixes (other):
7147 - Older Linux kernels erroneously respond to strange nmap behavior
7148 by having accept() return successfully with a zero-length
7149 socket. When this happens, just close the connection. Previously,
7150 we would try harder to learn the remote address: but there was
7151 no such remote address to learn, and our method for trying to
7152 learn it was incorrect. Fixes bugs 1240, 4745, and 4747. Bugfix
7153 on 0.1.0.3-rc. Reported and diagnosed by "r1eo".
7154 - Fix null-pointer access that could occur if TLS allocation failed.
7155 Fixes bug 4531; bugfix on 0.2.0.20-rc. Found by "troll_un". This was
7156 erroneously listed as fixed in 0.2.3.9-alpha, but the fix had
7157 accidentally been reverted.
7158 - Fix our implementation of crypto_random_hostname() so it can't
7159 overflow on ridiculously large inputs. (No Tor version has ever
7160 provided this kind of bad inputs, but let's be correct in depth.)
7161 Fixes bug 4413; bugfix on 0.2.2.9-alpha. Fix by Stephen Palmateer.
7162 - Find more places in the code that should have been testing for
7163 invalid sockets using the SOCKET_OK macro. Required for a fix
7164 for bug 4533. Bugfix on 0.2.2.28-beta.
7165 - Fix an assertion failure when, while running with bufferevents, a
7166 connection finishes connecting after it is marked for close, but
7167 before it is closed. Fixes bug 4697; bugfix on 0.2.3.1-alpha.
7168 - test_util_spawn_background_ok() hardcoded the expected value
7169 for ENOENT to 2. This isn't portable as error numbers are
7170 platform specific, and particularly the hurd has ENOENT at
7171 0x40000002. Construct expected string at runtime, using the correct
7172 value for ENOENT. Fixes bug 4733; bugfix on 0.2.3.1-alpha.
7173 - Reject attempts to disable DisableDebuggerAttachment while Tor is
7174 running. Fixes bug 4650; bugfix on 0.2.3.9-alpha.
7175 - Use an appropriate-width type for sockets in tor-fw-helper on
7176 win64. Fixes bug 1983 at last. Bugfix on 0.2.3.9-alpha.
7179 - When sending or relaying a RELAY_EARLY cell, we used to convert
7180 it to a RELAY cell if the connection was using the v1 link
7181 protocol. This was a workaround for older versions of Tor, which
7182 didn't handle RELAY_EARLY cells properly. Now that all supported
7183 versions can handle RELAY_EARLY cells, and now that we're enforcing
7184 the "no RELAY_EXTEND commands except in RELAY_EARLY cells" rule,
7185 remove this workaround. Addresses bug 4786.
7187 o Code simplifications and refactoring:
7188 - Use OpenSSL's built-in SSL_state_string_long() instead of our
7189 own homebrewed ssl_state_to_string() replacement. Patch from
7190 Emile Snyder. Fixes bug 4653.
7191 - Use macros to indicate OpenSSL versions, so we don't need to worry
7192 about accidental hexadecimal bit shifts.
7193 - Remove some workaround code for OpenSSL 0.9.6 (which is no longer
7195 - Convert more instances of tor_snprintf+tor_strdup into tor_asprintf.
7196 - Use the smartlist_add_asprintf() alias more consistently.
7197 - Use a TOR_INVALID_SOCKET macro when initializing a socket to an
7198 invalid value, rather than just -1.
7199 - Rename a handful of old identifiers, mostly related to crypto
7200 structures and crypto functions. By convention, our "create an
7201 object" functions are called "type_new()", our "free an object"
7202 functions are called "type_free()", and our types indicate that
7203 they are types only with a final "_t". But a handful of older
7204 types and functions broke these rules, with function names like
7205 "type_create" or "subsystem_op_type", or with type names like
7209 Changes in version 0.2.3.10-alpha - 2011-12-16
7210 Tor 0.2.3.10-alpha fixes a critical heap-overflow security issue in
7211 Tor's buffers code. Absolutely everybody should upgrade.
7213 The bug relied on an incorrect calculation when making data continuous
7214 in one of our IO buffers, if the first chunk of the buffer was
7215 misaligned by just the wrong amount. The miscalculation would allow an
7216 attacker to overflow a piece of heap-allocated memory. To mount this
7217 attack, the attacker would need to either open a SOCKS connection to
7218 Tor's SocksPort (usually restricted to localhost), or target a Tor
7219 instance configured to make its connections through a SOCKS proxy
7220 (which Tor does not do by default).
7222 Good security practice requires that all heap-overflow bugs should be
7223 presumed to be exploitable until proven otherwise, so we are treating
7224 this as a potential code execution attack. Please upgrade immediately!
7225 This bug does not affect bufferevents-based builds of Tor. Special
7226 thanks to "Vektor" for reporting this issue to us!
7228 This release also contains a few minor bugfixes for issues discovered
7232 - Fix a heap overflow bug that could occur when trying to pull
7233 data into the first chunk of a buffer, when that chunk had
7234 already had some data drained from it. Fixes CVE-2011-2778;
7235 bugfix on 0.2.0.16-alpha. Reported by "Vektor".
7238 - If we can't attach streams to a rendezvous circuit when we
7239 finish connecting to a hidden service, clear the rendezvous
7240 circuit's stream-isolation state and try to attach streams
7241 again. Previously, we cleared rendezvous circuits' isolation
7242 state either too early (if they were freshly built) or not at all
7243 (if they had been built earlier and were cannibalized). Bugfix on
7244 0.2.3.3-alpha; fixes bug 4655.
7245 - Fix compilation of the libnatpmp helper on non-Windows. Bugfix on
7246 0.2.3.9-alpha; fixes bug 4691. Reported by Anthony G. Basile.
7247 - Fix an assertion failure when a relay with accounting enabled
7248 starts up while dormant. Fixes bug 4702; bugfix on 0.2.3.9-alpha.
7251 - Update to the December 6 2011 Maxmind GeoLite Country database.
7254 Changes in version 0.2.2.35 - 2011-12-16
7255 Tor 0.2.2.35 fixes a critical heap-overflow security issue in Tor's
7256 buffers code. Absolutely everybody should upgrade.
7258 The bug relied on an incorrect calculation when making data continuous
7259 in one of our IO buffers, if the first chunk of the buffer was
7260 misaligned by just the wrong amount. The miscalculation would allow an
7261 attacker to overflow a piece of heap-allocated memory. To mount this
7262 attack, the attacker would need to either open a SOCKS connection to
7263 Tor's SocksPort (usually restricted to localhost), or target a Tor
7264 instance configured to make its connections through a SOCKS proxy
7265 (which Tor does not do by default).
7267 Good security practice requires that all heap-overflow bugs should be
7268 presumed to be exploitable until proven otherwise, so we are treating
7269 this as a potential code execution attack. Please upgrade immediately!
7270 This bug does not affect bufferevents-based builds of Tor. Special
7271 thanks to "Vektor" for reporting this issue to us!
7273 Tor 0.2.2.35 also fixes several bugs in previous versions, including
7274 crash bugs for unusual configurations, and a long-term bug that
7275 would prevent Tor from starting on Windows machines with draconian
7278 With this release, we remind everyone that 0.2.0.x has reached its
7279 formal end-of-life. Those Tor versions have many known flaws, and
7280 nobody should be using them. You should upgrade -- ideally to the
7281 0.2.2.x series. If you're using a Linux or BSD and its packages are
7282 obsolete, stop using those packages and upgrade anyway.
7284 The Tor 0.2.1.x series is also approaching its end-of-life: it will no
7285 longer receive support after some time in early 2012.
7288 - Fix a heap overflow bug that could occur when trying to pull
7289 data into the first chunk of a buffer, when that chunk had
7290 already had some data drained from it. Fixes CVE-2011-2778;
7291 bugfix on 0.2.0.16-alpha. Reported by "Vektor".
7292 - Initialize Libevent with the EVENT_BASE_FLAG_NOLOCK flag enabled, so
7293 that it doesn't attempt to allocate a socketpair. This could cause
7294 some problems on Windows systems with overzealous firewalls. Fix for
7295 bug 4457; workaround for Libevent versions 2.0.1-alpha through
7297 - If we mark an OR connection for close based on a cell we process,
7298 don't process any further cells on it. We already avoid further
7299 reads on marked-for-close connections, but now we also discard the
7300 cells we'd already read. Fixes bug 4299; bugfix on 0.2.0.10-alpha,
7301 which was the first version where we might mark a connection for
7302 close based on processing a cell on it.
7303 - Correctly sanity-check that we don't underflow on a memory
7304 allocation (and then assert) for hidden service introduction
7305 point decryption. Bug discovered by Dan Rosenberg. Fixes bug 4410;
7306 bugfix on 0.2.1.5-alpha.
7307 - Fix a memory leak when we check whether a hidden service
7308 descriptor has any usable introduction points left. Fixes bug
7309 4424. Bugfix on 0.2.2.25-alpha.
7310 - Don't crash when we're running as a relay and don't have a GeoIP
7311 file. Bugfix on 0.2.2.34; fixes bug 4340. This backports a fix
7312 we've had in the 0.2.3.x branch already.
7313 - When running as a client, do not print a misleading (and plain
7314 wrong) log message that we're collecting "directory request"
7315 statistics: clients don't collect statistics. Also don't create a
7316 useless (because empty) stats file in the stats/ directory. Fixes
7317 bug 4353; bugfix on 0.2.2.34.
7320 - Detect failure to initialize Libevent. This fix provides better
7321 detection for future instances of bug 4457.
7322 - Avoid frequent calls to the fairly expensive cull_wedged_cpuworkers
7323 function. This was eating up hideously large amounts of time on some
7324 busy servers. Fixes bug 4518; bugfix on 0.0.9.8.
7325 - Resolve an integer overflow bug in smartlist_ensure_capacity().
7326 Fixes bug 4230; bugfix on Tor 0.1.0.1-rc. Based on a patch by
7328 - Don't warn about unused log_mutex in log.c when building with
7329 --disable-threads using a recent GCC. Fixes bug 4437; bugfix on
7330 0.1.0.6-rc which introduced --disable-threads.
7331 - When configuring, starting, or stopping an NT service, stop
7332 immediately after the service configuration attempt has succeeded
7333 or failed. Fixes bug 3963; bugfix on 0.2.0.7-alpha.
7334 - When sending a NETINFO cell, include the original address
7335 received for the other side, not its canonical address. Found
7336 by "troll_un"; fixes bug 4349; bugfix on 0.2.0.10-alpha.
7337 - Fix a typo in a hibernation-related log message. Fixes bug 4331;
7338 bugfix on 0.2.2.23-alpha; found by "tmpname0901".
7339 - Fix a memory leak in launch_direct_bridge_descriptor_fetch() that
7340 occurred when a client tried to fetch a descriptor for a bridge
7341 in ExcludeNodes. Fixes bug 4383; bugfix on 0.2.2.25-alpha.
7342 - Backport fixes for a pair of compilation warnings on Windows.
7343 Fixes bug 4521; bugfix on 0.2.2.28-beta and on 0.2.2.29-beta.
7344 - If we had ever tried to call tor_addr_to_str on an address of
7345 unknown type, we would have done a strdup on an uninitialized
7346 buffer. Now we won't. Fixes bug 4529; bugfix on 0.2.1.3-alpha.
7347 Reported by "troll_un".
7348 - Correctly detect and handle transient lookup failures from
7349 tor_addr_lookup. Fixes bug 4530; bugfix on 0.2.1.5-alpha.
7350 Reported by "troll_un".
7351 - Fix null-pointer access that could occur if TLS allocation failed.
7352 Fixes bug 4531; bugfix on 0.2.0.20-rc. Found by "troll_un".
7353 - Use tor_socket_t type for listener argument to accept(). Fixes bug
7354 4535; bugfix on 0.2.2.28-beta. Found by "troll_un".
7357 - Add two new config options for directory authorities:
7358 AuthDirFastGuarantee sets a bandwidth threshold for guaranteeing the
7359 Fast flag, and AuthDirGuardBWGuarantee sets a bandwidth threshold
7360 that is always sufficient to satisfy the bandwidth requirement for
7361 the Guard flag. Now it will be easier for researchers to simulate
7362 Tor networks with different values. Resolves ticket 4484.
7363 - When Tor ignores a hidden service specified in its configuration,
7364 include the hidden service's directory in the warning message.
7365 Previously, we would only tell the user that some hidden service
7366 was ignored. Bugfix on 0.0.6; fixes bug 4426.
7367 - Update to the December 6 2011 Maxmind GeoLite Country database.
7369 o Packaging changes:
7370 - Make it easier to automate expert package builds on Windows,
7371 by removing an absolute path from makensis.exe command.
7374 Changes in version 0.2.1.32 - 2011-12-16
7375 Tor 0.2.1.32 backports important security and privacy fixes for
7376 oldstable. This release is intended only for package maintainers and
7377 others who cannot use the 0.2.2 stable series. All others should be
7378 using Tor 0.2.2.x or newer.
7380 The Tor 0.2.1.x series will reach formal end-of-life some time in
7381 early 2012; we will stop releasing patches for it then.
7383 o Major bugfixes (also included in 0.2.2.x):
7384 - Correctly sanity-check that we don't underflow on a memory
7385 allocation (and then assert) for hidden service introduction
7386 point decryption. Bug discovered by Dan Rosenberg. Fixes bug 4410;
7387 bugfix on 0.2.1.5-alpha.
7388 - Fix a heap overflow bug that could occur when trying to pull
7389 data into the first chunk of a buffer, when that chunk had
7390 already had some data drained from it. Fixes CVE-2011-2778;
7391 bugfix on 0.2.0.16-alpha. Reported by "Vektor".
7394 - Update to the December 6 2011 Maxmind GeoLite Country database.
7397 Changes in version 0.2.3.9-alpha - 2011-12-08
7398 Tor 0.2.3.9-alpha introduces initial IPv6 support for bridges, adds
7399 a "DisableNetwork" security feature that bundles can use to avoid
7400 touching the network until bridges are configured, moves forward on
7401 the pluggable transport design, fixes a flaw in the hidden service
7402 design that unnecessarily prevented clients with wrong clocks from
7403 reaching hidden services, and fixes a wide variety of other issues.
7406 - Clients can now connect to private bridges over IPv6. Bridges
7407 still need at least one IPv4 address in order to connect to
7408 other relays. Note that we don't yet handle the case where the
7409 user has two bridge lines for the same bridge (one IPv4, one
7410 IPv6). Implements parts of proposal 186.
7411 - New "DisableNetwork" config option to prevent Tor from launching any
7412 connections or accepting any connections except on a control port.
7413 Bundles and controllers can set this option before letting Tor talk
7414 to the rest of the network, for example to prevent any connections
7415 to a non-bridge address. Packages like Orbot can also use this
7416 option to instruct Tor to save power when the network is off.
7417 - Clients and bridges can now be configured to use a separate
7418 "transport" proxy. This approach makes the censorship arms race
7419 easier by allowing bridges to use protocol obfuscation plugins. It
7420 implements the "managed proxy" part of proposal 180 (ticket 3472).
7421 - When using OpenSSL 1.0.0 or later, use OpenSSL's counter mode
7422 implementation. It makes AES_CTR about 7% faster than our old one
7423 (which was about 10% faster than the one OpenSSL used to provide).
7424 Resolves ticket 4526.
7425 - Add a "tor2web mode" for clients that want to connect to hidden
7426 services non-anonymously (and possibly more quickly). As a safety
7427 measure to try to keep users from turning this on without knowing
7428 what they are doing, tor2web mode must be explicitly enabled at
7429 compile time, and a copy of Tor compiled to run in tor2web mode
7430 cannot be used as a normal Tor client. Implements feature 2553.
7431 - Add experimental support for running on Windows with IOCP and no
7432 kernel-space socket buffers. This feature is controlled by a new
7433 "UserspaceIOCPBuffers" config option (off by default), which has
7434 no effect unless Tor has been built with support for bufferevents,
7435 is running on Windows, and has enabled IOCP. This may, in the long
7436 run, help solve or mitigate bug 98.
7437 - Use a more secure consensus parameter voting algorithm. Now at
7438 least three directory authorities or a majority of them must
7439 vote on a given parameter before it will be included in the
7440 consensus. Implements proposal 178.
7443 - Hidden services now ignore the timestamps on INTRODUCE2 cells.
7444 They used to check that the timestamp was within 30 minutes
7445 of their system clock, so they could cap the size of their
7446 replay-detection cache, but that approach unnecessarily refused
7447 service to clients with wrong clocks. Bugfix on 0.2.1.6-alpha, when
7448 the v3 intro-point protocol (the first one which sent a timestamp
7449 field in the INTRODUCE2 cell) was introduced; fixes bug 3460.
7450 - Only use the EVP interface when AES acceleration is enabled,
7451 to avoid a 5-7% performance regression. Resolves issue 4525;
7452 bugfix on 0.2.3.8-alpha.
7454 o Privacy/anonymity features (bridge detection):
7455 - Make bridge SSL certificates a bit more stealthy by using random
7456 serial numbers, in the same fashion as OpenSSL when generating
7457 self-signed certificates. Implements ticket 4584.
7458 - Introduce a new config option "DynamicDHGroups", enabled by
7459 default, which provides each bridge with a unique prime DH modulus
7460 to be used during SSL handshakes. This option attempts to help
7461 against censors who might use the Apache DH modulus as a static
7462 identifier for bridges. Addresses ticket 4548.
7464 o Minor features (new/different config options):
7465 - New configuration option "DisableDebuggerAttachment" (on by default)
7466 to prevent basic debugging attachment attempts by other processes.
7467 Supports Mac OS X and Gnu/Linux. Resolves ticket 3313.
7468 - Allow MapAddress directives to specify matches against super-domains,
7469 as in "MapAddress *.torproject.org *.torproject.org.torserver.exit".
7470 Implements issue 933.
7471 - Slightly change behavior of "list" options (that is, config
7472 options that can appear more than once) when they appear both in
7473 torrc and on the command line. Previously, the command-line options
7474 would be appended to the ones from torrc. Now, the command-line
7475 options override the torrc options entirely. This new behavior
7476 allows the user to override list options (like exit policies and
7477 ports to listen on) from the command line, rather than simply
7478 appending to the list.
7479 - You can get the old (appending) command-line behavior for "list"
7480 options by prefixing the option name with a "+".
7481 - You can remove all the values for a "list" option from the command
7482 line without adding any new ones by prefixing the option name
7484 - Add experimental support for a "defaults" torrc file to be parsed
7485 before the regular torrc. Torrc options override the defaults file's
7486 options in the same way that the command line overrides the torrc.
7487 The SAVECONF controller command saves only those options which
7488 differ between the current configuration and the defaults file. HUP
7489 reloads both files. (Note: This is an experimental feature; its
7490 behavior will probably be refined in future 0.2.3.x-alpha versions
7491 to better meet packagers' needs.) Implements task 4552.
7494 - Try to make the introductory warning message that Tor prints on
7495 startup more useful for actually finding help and information.
7496 Resolves ticket 2474.
7497 - Running "make version" now displays the version of Tor that
7498 we're about to build. Idea from katmagic; resolves issue 4400.
7499 - Expire old or over-used hidden service introduction points.
7500 Required by fix for bug 3460.
7501 - Move the replay-detection cache for the RSA-encrypted parts of
7502 INTRODUCE2 cells to the introduction point data structures.
7503 Previously, we would use one replay-detection cache per hidden
7504 service. Required by fix for bug 3460.
7505 - Reduce the lifetime of elements of hidden services' Diffie-Hellman
7506 public key replay-detection cache from 60 minutes to 5 minutes. This
7507 replay-detection cache is now used only to detect multiple
7508 INTRODUCE2 cells specifying the same rendezvous point, so we can
7509 avoid launching multiple simultaneous attempts to connect to it.
7511 o Minor bugfixes (on Tor 0.2.2.x and earlier):
7512 - Resolve an integer overflow bug in smartlist_ensure_capacity().
7513 Fixes bug 4230; bugfix on Tor 0.1.0.1-rc. Based on a patch by
7515 - Fix a minor formatting issue in one of tor-gencert's error messages.
7517 - Prevent a false positive from the check-spaces script, by disabling
7518 the "whitespace between function name and (" check for functions
7520 - Fix a log message suggesting that people contact a non-existent
7521 email address. Fixes bug 3448.
7522 - Fix null-pointer access that could occur if TLS allocation failed.
7523 Fixes bug 4531; bugfix on 0.2.0.20-rc. Found by "troll_un".
7524 - Report a real bootstrap problem to the controller on router
7525 identity mismatch. Previously we just said "foo", which probably
7526 made a lot of sense at the time. Fixes bug 4169; bugfix on
7528 - If we had ever tried to call tor_addr_to_str() on an address of
7529 unknown type, we would have done a strdup() on an uninitialized
7530 buffer. Now we won't. Fixes bug 4529; bugfix on 0.2.1.3-alpha.
7531 Reported by "troll_un".
7532 - Correctly detect and handle transient lookup failures from
7533 tor_addr_lookup(). Fixes bug 4530; bugfix on 0.2.1.5-alpha.
7534 Reported by "troll_un".
7535 - Use tor_socket_t type for listener argument to accept(). Fixes bug
7536 4535; bugfix on 0.2.2.28-beta. Found by "troll_un".
7537 - Initialize conn->addr to a valid state in spawn_cpuworker(). Fixes
7538 bug 4532; found by "troll_un".
7540 o Minor bugfixes (on Tor 0.2.3.x):
7541 - Fix a compile warning in tor_inet_pton(). Bugfix on 0.2.3.8-alpha;
7543 - Don't send two ESTABLISH_RENDEZVOUS cells when opening a new
7544 circuit for use as a hidden service client's rendezvous point.
7545 Fixes bugs 4641 and 4171; bugfix on 0.2.3.3-alpha. Diagnosed
7546 with help from wanoskarnet.
7547 - Restore behavior of overriding SocksPort, ORPort, and similar
7548 options from the command line. Bugfix on 0.2.3.3-alpha.
7551 - Properly handle the case where the build-tree is not the same
7552 as the source tree when generating src/common/common_sha1.i,
7553 src/or/micro-revision.i, and src/or/or_sha1.i. Fixes bug 3953;
7554 bugfix on 0.2.0.1-alpha.
7556 o Code simplifications, cleanups, and refactorings:
7557 - Remove the pure attribute from all functions that used it
7558 previously. In many cases we assigned it incorrectly, because the
7559 functions might assert or call impure functions, and we don't have
7560 evidence that keeping the pure attribute is worthwhile. Implements
7561 changes suggested in ticket 4421.
7562 - Remove some dead code spotted by coverity. Fixes cid 432.
7563 Bugfix on 0.2.3.1-alpha, closes bug 4637.
7566 Changes in version 0.2.3.8-alpha - 2011-11-22
7567 Tor 0.2.3.8-alpha fixes some crash and assert bugs, including a
7568 socketpair-related bug that has been bothering Windows users. It adds
7569 support to serve microdescriptors to controllers, so Vidalia's network
7570 map can resume listing relays (once Vidalia implements its side),
7571 and adds better support for hardware AES acceleration. Finally, it
7572 starts the process of adjusting the bandwidth cutoff for getting the
7573 "Fast" flag from 20KB to (currently) 32KB -- preliminary results show
7574 that tiny relays harm performance more than they help network capacity.
7577 - Initialize Libevent with the EVENT_BASE_FLAG_NOLOCK flag enabled, so
7578 that it doesn't attempt to allocate a socketpair. This could cause
7579 some problems on Windows systems with overzealous firewalls. Fix for
7580 bug 4457; workaround for Libevent versions 2.0.1-alpha through
7582 - Correctly sanity-check that we don't underflow on a memory
7583 allocation (and then assert) for hidden service introduction
7584 point decryption. Bug discovered by Dan Rosenberg. Fixes bug 4410;
7585 bugfix on 0.2.1.5-alpha.
7586 - Remove the artificially low cutoff of 20KB to guarantee the Fast
7587 flag. In the past few years the average relay speed has picked
7588 up, and while the "top 7/8 of the network get the Fast flag" and
7589 "all relays with 20KB or more of capacity get the Fast flag" rules
7590 used to have the same result, now the top 7/8 of the network has
7591 a capacity more like 32KB. Bugfix on 0.2.1.14-rc. Fixes bug 4489.
7592 - Fix a rare assertion failure when checking whether a v0 hidden
7593 service descriptor has any usable introduction points left, and
7594 we don't have enough information to build a circuit to the first
7595 intro point named in the descriptor. The HS client code in
7596 0.2.3.x no longer uses v0 HS descriptors, but this assertion can
7597 trigger on (and crash) v0 HS authorities. Fixes bug 4411.
7598 Bugfix on 0.2.3.1-alpha; diagnosed by frosty_un.
7599 - Make bridge authorities not crash when they are asked for their own
7600 descriptor. Bugfix on 0.2.3.7-alpha, reported by Lucky Green.
7601 - When running as a client, do not print a misleading (and plain
7602 wrong) log message that we're collecting "directory request"
7603 statistics: clients don't collect statistics. Also don't create a
7604 useless (because empty) stats file in the stats/ directory. Fixes
7605 bug 4353; bugfix on 0.2.2.34 and 0.2.3.7-alpha.
7608 - Allow Tor controllers like Vidalia to obtain the microdescriptor
7609 for a relay by identity digest or nickname. Previously,
7610 microdescriptors were only available by their own digests, so a
7611 controller would have to ask for and parse the whole microdescriptor
7612 consensus in order to look up a single relay's microdesc. Fixes
7613 bug 3832; bugfix on 0.2.3.1-alpha.
7614 - Use OpenSSL's EVP interface for AES encryption, so that all AES
7615 operations can use hardware acceleration (if present). Resolves
7618 o Minor bugfixes (on 0.2.2.x and earlier):
7619 - Detect failure to initialize Libevent. This fix provides better
7620 detection for future instances of bug 4457.
7621 - Avoid frequent calls to the fairly expensive cull_wedged_cpuworkers
7622 function. This was eating up hideously large amounts of time on some
7623 busy servers. Fixes bug 4518; bugfix on 0.0.9.8.
7624 - Don't warn about unused log_mutex in log.c when building with
7625 --disable-threads using a recent GCC. Fixes bug 4437; bugfix on
7626 0.1.0.6-rc which introduced --disable-threads.
7627 - Allow manual 'authenticate' commands to the controller interface
7628 from netcat (nc) as well as telnet. We were rejecting them because
7629 they didn't come with the expected whitespace at the end of the
7630 command. Bugfix on 0.1.1.1-alpha; fixes bug 2893.
7631 - Fix some (not actually triggerable) buffer size checks in usage of
7632 tor_inet_ntop. Fixes bug 4434; bugfix on Tor 0.2.0.1-alpha. Patch
7634 - Fix parsing of some corner-cases with tor_inet_pton(). Fixes
7635 bug 4515; bugfix on 0.2.0.1-alpha; fix by Anders Sundman.
7636 - When configuring, starting, or stopping an NT service, stop
7637 immediately after the service configuration attempt has succeeded
7638 or failed. Fixes bug 3963; bugfix on 0.2.0.7-alpha.
7639 - When sending a NETINFO cell, include the original address
7640 received for the other side, not its canonical address. Found
7641 by "troll_un"; fixes bug 4349; bugfix on 0.2.0.10-alpha.
7642 - Rename the bench_{aes,dmap} functions to test_*, so that tinytest
7643 can pick them up when the tests aren't disabled. Bugfix on
7644 0.2.2.4-alpha which introduced tinytest.
7645 - Fix a memory leak when we check whether a hidden service
7646 descriptor has any usable introduction points left. Fixes bug
7647 4424. Bugfix on 0.2.2.25-alpha.
7648 - Fix a memory leak in launch_direct_bridge_descriptor_fetch() that
7649 occurred when a client tried to fetch a descriptor for a bridge
7650 in ExcludeNodes. Fixes bug 4383; bugfix on 0.2.2.25-alpha.
7652 o Minor bugfixes (on 0.2.3.x):
7653 - Make util unit tests build correctly with MSVC. Bugfix on
7654 0.2.3.3-alpha. Patch by Gisle Vanem.
7655 - Successfully detect AUTH_CHALLENGE cells with no recognized
7656 authentication type listed. Fixes bug 4367; bugfix on 0.2.3.6-alpha.
7658 - If a relay receives an AUTH_CHALLENGE cell it can't answer,
7659 it should still send a NETINFO cell to allow the connection to
7660 become open. Fixes bug 4368; fix on 0.2.3.6-alpha; bug found by
7662 - Log less loudly when we get an invalid authentication certificate
7663 from a source other than a directory authority: it's not unusual
7664 to see invalid certs because of clock skew. Fixes bug 4370; bugfix
7666 - Tolerate servers with more clock skew in their authentication
7667 certificates than previously. Fixes bug 4371; bugfix on
7669 - Fix a couple of compile warnings on Windows. Fixes bug 4469; bugfix
7670 on 0.2.3.4-alpha and 0.2.3.6-alpha.
7673 - Add two new config options for directory authorities:
7674 AuthDirFastGuarantee sets a bandwidth threshold for guaranteeing the
7675 Fast flag, and AuthDirGuardBWGuarantee sets a bandwidth threshold
7676 that is always sufficient to satisfy the bandwidth requirement for
7677 the Guard flag. Now it will be easier for researchers to simulate
7678 Tor networks with different values. Resolves ticket 4484.
7679 - When Tor ignores a hidden service specified in its configuration,
7680 include the hidden service's directory in the warning message.
7681 Previously, we would only tell the user that some hidden service
7682 was ignored. Bugfix on 0.0.6; fixes bug 4426.
7683 - When we fail to initialize Libevent, retry with IOCP disabled so we
7684 don't need to turn on multi-threading support in Libevent, which in
7685 turn requires a working socketpair(). This is a workaround for bug
7686 4457, which affects Libevent versions from 2.0.1-alpha through
7688 - Detect when we try to build on a platform that doesn't define
7689 AF_UNSPEC to 0. We don't work there, so refuse to compile.
7690 - Update to the November 1 2011 Maxmind GeoLite Country database.
7692 o Packaging changes:
7693 - Make it easier to automate expert package builds on Windows,
7694 by removing an absolute path from makensis.exe command.
7696 o Code simplifications and refactoring:
7697 - Remove some redundant #include directives throughout the code.
7698 Patch from Andrea Gelmini.
7699 - Unconditionally use OpenSSL's AES implementation instead of our
7700 old built-in one. OpenSSL's AES has been better for a while, and
7701 relatively few servers should still be on any version of OpenSSL
7702 that doesn't have good optimized assembly AES.
7703 - Use the name "CERTS" consistently to refer to the new cell type;
7704 we were calling it CERT in some places and CERTS in others.
7707 - Numerous new unit tests for functions in util.c and address.c by
7709 - The long-disabled benchmark tests are now split into their own
7710 ./src/test/bench binary.
7711 - The benchmark tests can now use more accurate timers than
7712 gettimeofday() when such timers are available.
7715 Changes in version 0.2.3.7-alpha - 2011-10-30
7716 Tor 0.2.3.7-alpha fixes a crash bug in 0.2.3.6-alpha introduced by
7717 the new v3 handshake. It also resolves yet another bridge address
7721 - If we mark an OR connection for close based on a cell we process,
7722 don't process any further cells on it. We already avoid further
7723 reads on marked-for-close connections, but now we also discard the
7724 cells we'd already read. Fixes bug 4299; bugfix on 0.2.0.10-alpha,
7725 which was the first version where we might mark a connection for
7726 close based on processing a cell on it.
7727 - Fix a double-free bug that would occur when we received an invalid
7728 certificate in a CERT cell in the new v3 handshake. Fixes bug 4343;
7729 bugfix on 0.2.3.6-alpha.
7730 - Bridges no longer include their address in NETINFO cells on outgoing
7731 OR connections, to allow them to blend in better with clients.
7732 Removes another avenue for enumerating bridges. Reported by
7733 "troll_un". Fixes bug 4348; bugfix on 0.2.0.10-alpha, when NETINFO
7734 cells were introduced.
7737 - Fixed a typo in a hibernation-related log message. Fixes bug 4331;
7738 bugfix on 0.2.2.23-alpha; found by "tmpname0901".
7741 Changes in version 0.2.3.6-alpha - 2011-10-26
7742 Tor 0.2.3.6-alpha includes the fix from 0.2.2.34 for a critical
7743 anonymity vulnerability where an attacker can deanonymize Tor
7744 users. Everybody should upgrade.
7746 This release also features support for a new v3 connection handshake
7747 protocol, and fixes to make hidden service connections more robust.
7750 - Implement a new handshake protocol (v3) for authenticating Tors to
7751 each other over TLS. It should be more resistant to fingerprinting
7752 than previous protocols, and should require less TLS hacking for
7753 future Tor implementations. Implements proposal 176.
7754 - Allow variable-length padding cells to disguise the length of
7755 Tor's TLS records. Implements part of proposal 184.
7757 o Privacy/anonymity fixes (clients):
7758 - Clients and bridges no longer send TLS certificate chains on
7759 outgoing OR connections. Previously, each client or bridge would
7760 use the same cert chain for all outgoing OR connections until
7761 its IP address changes, which allowed any relay that the client
7762 or bridge contacted to determine which entry guards it is using.
7763 Fixes CVE-2011-2768. Bugfix on 0.0.9pre5; found by "frosty_un".
7764 - If a relay receives a CREATE_FAST cell on a TLS connection, it
7765 no longer considers that connection as suitable for satisfying a
7766 circuit EXTEND request. Now relays can protect clients from the
7767 CVE-2011-2768 issue even if the clients haven't upgraded yet.
7768 - Directory authorities no longer assign the Guard flag to relays
7769 that haven't upgraded to the above "refuse EXTEND requests
7770 to client connections" fix. Now directory authorities can
7771 protect clients from the CVE-2011-2768 issue even if neither
7772 the clients nor the relays have upgraded yet. There's a new
7773 "GiveGuardFlagTo_CVE_2011_2768_VulnerableRelays" config option
7774 to let us transition smoothly, else tomorrow there would be no
7777 o Major bugfixes (hidden services):
7778 - Improve hidden service robustness: when an attempt to connect to
7779 a hidden service ends, be willing to refetch its hidden service
7780 descriptors from each of the HSDir relays responsible for them
7781 immediately. Previously, we would not consider refetching the
7782 service's descriptors from each HSDir for 15 minutes after the last
7783 fetch, which was inconvenient if the hidden service was not running
7784 during the first attempt. Bugfix on 0.2.0.18-alpha; fixes bug 3335.
7785 - When one of a hidden service's introduction points appears to be
7786 unreachable, stop trying it. Previously, we would keep trying
7787 to build circuits to the introduction point until we lost the
7788 descriptor, usually because the user gave up and restarted Tor.
7789 Partly fixes bug 3825.
7790 - Don't launch a useless circuit after failing to use one of a
7791 hidden service's introduction points. Previously, we would
7792 launch a new introduction circuit, but not set the hidden service
7793 which that circuit was intended to connect to, so it would never
7794 actually be used. A different piece of code would then create a
7795 new introduction circuit correctly. Bug reported by katmagic and
7796 found by Sebastian Hahn. Bugfix on 0.2.1.13-alpha; fixes bug 4212.
7798 o Major bugfixes (other):
7799 - Bridges now refuse CREATE or CREATE_FAST cells on OR connections
7800 that they initiated. Relays could distinguish incoming bridge
7801 connections from client connections, creating another avenue for
7802 enumerating bridges. Fixes CVE-2011-2769. Bugfix on 0.2.0.3-alpha.
7803 Found by "frosty_un".
7804 - Don't update the AccountingSoftLimitHitAt state file entry whenever
7805 tor gets started. This prevents a wrong average bandwidth
7806 estimate, which would cause relays to always start a new accounting
7807 interval at the earliest possible moment. Fixes bug 2003; bugfix
7808 on 0.2.2.7-alpha. Reported by BryonEldridge, who also helped
7809 immensely in tracking this bug down.
7810 - Fix a crash bug when changing node restrictions while a DNS lookup
7811 is in-progress. Fixes bug 4259; bugfix on 0.2.2.25-alpha. Bugfix
7814 o Minor bugfixes (on 0.2.2.x and earlier):
7815 - When a hidden service turns an extra service-side introduction
7816 circuit into a general-purpose circuit, free the rend_data and
7817 intro_key fields first, so we won't leak memory if the circuit
7818 is cannibalized for use as another service-side introduction
7819 circuit. Bugfix on 0.2.1.7-alpha; fixes bug 4251.
7820 - Rephrase the log message emitted if the TestSocks check is
7821 successful. Patch from Fabian Keil; fixes bug 4094.
7822 - Bridges now skip DNS self-tests, to act a little more stealthily.
7823 Fixes bug 4201; bugfix on 0.2.0.3-alpha, which first introduced
7824 bridges. Patch by "warms0x".
7825 - Remove a confusing dollar sign from the example fingerprint in the
7826 man page, and also make the example fingerprint a valid one. Fixes
7827 bug 4309; bugfix on 0.2.1.3-alpha.
7828 - Fix internal bug-checking logic that was supposed to catch
7829 failures in digest generation so that it will fail more robustly
7830 if we ask for a nonexistent algorithm. Found by Coverity Scan.
7831 Bugfix on 0.2.2.1-alpha; fixes Coverity CID 479.
7832 - Report any failure in init_keys() calls launched because our
7833 IP address has changed. Spotted by Coverity Scan. Bugfix on
7834 0.1.1.4-alpha; fixes CID 484.
7836 o Minor bugfixes (on 0.2.3.x):
7837 - Fix a bug in configure.in that kept it from building a configure
7838 script with autoconf versions earlier than 2.61. Fixes bug 2430;
7839 bugfix on 0.2.3.1-alpha.
7840 - Don't warn users that they are exposing a client port to the
7841 Internet if they have specified an RFC1918 address. Previously,
7842 we would warn if the user had specified any non-loopback
7843 address. Bugfix on 0.2.3.3-alpha. Fixes bug 4018; reported by Tas.
7844 - Fix memory leaks in the failing cases of the new SocksPort and
7845 ControlPort code. Found by Coverity Scan. Bugfix on 0.2.3.3-alpha;
7846 fixes coverity CIDs 485, 486, and 487.
7849 - When a hidden service's introduction point times out, consider
7850 trying it again during the next attempt to connect to the
7851 HS. Previously, we would not try it again unless a newly fetched
7852 descriptor contained it. Required by fixes for bugs 1297 and 3825.
7853 - The next version of Windows will be called Windows 8, and it has
7854 a major version of 6, minor version of 2. Correctly identify that
7855 version instead of calling it "Very recent version". Resolves
7856 ticket 4153; reported by funkstar.
7857 - The Bridge Authority now writes statistics on how many bridge
7858 descriptors it gave out in total, and how many unique descriptors
7859 it gave out. It also lists how often the most and least commonly
7860 fetched descriptors were given out, as well as the median and
7861 25th/75th percentile. Implements tickets 4200 and 4294.
7862 - Update to the October 4 2011 Maxmind GeoLite Country database.
7864 o Code simplifications and refactoring:
7865 - Remove some old code to remember statistics about which descriptors
7866 we've served as a directory mirror. The feature wasn't used and
7867 is outdated now that microdescriptors are around.
7868 - Rename Tor functions that turn strings into addresses, so that
7869 "parse" indicates that no hostname resolution occurs, and
7870 "lookup" indicates that hostname resolution may occur. This
7871 should help prevent mistakes in the future. Fixes bug 3512.
7874 Changes in version 0.2.2.34 - 2011-10-26
7875 Tor 0.2.2.34 fixes a critical anonymity vulnerability where an attacker
7876 can deanonymize Tor users. Everybody should upgrade.
7878 The attack relies on four components: 1) Clients reuse their TLS cert
7879 when talking to different relays, so relays can recognize a user by
7880 the identity key in her cert. 2) An attacker who knows the client's
7881 identity key can probe each guard relay to see if that identity key
7882 is connected to that guard relay right now. 3) A variety of active
7883 attacks in the literature (starting from "Low-Cost Traffic Analysis
7884 of Tor" by Murdoch and Danezis in 2005) allow a malicious website to
7885 discover the guard relays that a Tor user visiting the website is using.
7886 4) Clients typically pick three guards at random, so the set of guards
7887 for a given user could well be a unique fingerprint for her. This
7888 release fixes components #1 and #2, which is enough to block the attack;
7889 the other two remain as open research problems. Special thanks to
7890 "frosty_un" for reporting the issue to us!
7892 Clients should upgrade so they are no longer recognizable by the TLS
7893 certs they present. Relays should upgrade so they no longer allow a
7894 remote attacker to probe them to test whether unpatched clients are
7895 currently connected to them.
7897 This release also fixes several vulnerabilities that allow an attacker
7898 to enumerate bridge relays. Some bridge enumeration attacks still
7899 remain; see for example proposal 188.
7901 o Privacy/anonymity fixes (clients):
7902 - Clients and bridges no longer send TLS certificate chains on
7903 outgoing OR connections. Previously, each client or bridge would
7904 use the same cert chain for all outgoing OR connections until
7905 its IP address changes, which allowed any relay that the client
7906 or bridge contacted to determine which entry guards it is using.
7907 Fixes CVE-2011-2768. Bugfix on 0.0.9pre5; found by "frosty_un".
7908 - If a relay receives a CREATE_FAST cell on a TLS connection, it
7909 no longer considers that connection as suitable for satisfying a
7910 circuit EXTEND request. Now relays can protect clients from the
7911 CVE-2011-2768 issue even if the clients haven't upgraded yet.
7912 - Directory authorities no longer assign the Guard flag to relays
7913 that haven't upgraded to the above "refuse EXTEND requests
7914 to client connections" fix. Now directory authorities can
7915 protect clients from the CVE-2011-2768 issue even if neither
7916 the clients nor the relays have upgraded yet. There's a new
7917 "GiveGuardFlagTo_CVE_2011_2768_VulnerableRelays" config option
7918 to let us transition smoothly, else tomorrow there would be no
7921 o Privacy/anonymity fixes (bridge enumeration):
7922 - Bridge relays now do their directory fetches inside Tor TLS
7923 connections, like all the other clients do, rather than connecting
7924 directly to the DirPort like public relays do. Removes another
7925 avenue for enumerating bridges. Fixes bug 4115; bugfix on 0.2.0.35.
7926 - Bridges relays now build circuits for themselves in a more similar
7927 way to how clients build them. Removes another avenue for
7928 enumerating bridges. Fixes bug 4124; bugfix on 0.2.0.3-alpha,
7929 when bridges were introduced.
7930 - Bridges now refuse CREATE or CREATE_FAST cells on OR connections
7931 that they initiated. Relays could distinguish incoming bridge
7932 connections from client connections, creating another avenue for
7933 enumerating bridges. Fixes CVE-2011-2769. Bugfix on 0.2.0.3-alpha.
7934 Found by "frosty_un".
7937 - Fix a crash bug when changing node restrictions while a DNS lookup
7938 is in-progress. Fixes bug 4259; bugfix on 0.2.2.25-alpha. Bugfix
7940 - Don't launch a useless circuit after failing to use one of a
7941 hidden service's introduction points. Previously, we would
7942 launch a new introduction circuit, but not set the hidden service
7943 which that circuit was intended to connect to, so it would never
7944 actually be used. A different piece of code would then create a
7945 new introduction circuit correctly. Bug reported by katmagic and
7946 found by Sebastian Hahn. Bugfix on 0.2.1.13-alpha; fixes bug 4212.
7949 - Change an integer overflow check in the OpenBSD_Malloc code so
7950 that GCC is less likely to eliminate it as impossible. Patch
7951 from Mansour Moufid. Fixes bug 4059.
7952 - When a hidden service turns an extra service-side introduction
7953 circuit into a general-purpose circuit, free the rend_data and
7954 intro_key fields first, so we won't leak memory if the circuit
7955 is cannibalized for use as another service-side introduction
7956 circuit. Bugfix on 0.2.1.7-alpha; fixes bug 4251.
7957 - Bridges now skip DNS self-tests, to act a little more stealthily.
7958 Fixes bug 4201; bugfix on 0.2.0.3-alpha, which first introduced
7959 bridges. Patch by "warms0x".
7960 - Fix internal bug-checking logic that was supposed to catch
7961 failures in digest generation so that it will fail more robustly
7962 if we ask for a nonexistent algorithm. Found by Coverity Scan.
7963 Bugfix on 0.2.2.1-alpha; fixes Coverity CID 479.
7964 - Report any failure in init_keys() calls launched because our
7965 IP address has changed. Spotted by Coverity Scan. Bugfix on
7966 0.1.1.4-alpha; fixes CID 484.
7968 o Minor bugfixes (log messages and documentation):
7969 - Remove a confusing dollar sign from the example fingerprint in the
7970 man page, and also make the example fingerprint a valid one. Fixes
7971 bug 4309; bugfix on 0.2.1.3-alpha.
7972 - The next version of Windows will be called Windows 8, and it has
7973 a major version of 6, minor version of 2. Correctly identify that
7974 version instead of calling it "Very recent version". Resolves
7975 ticket 4153; reported by funkstar.
7976 - Downgrade log messages about circuit timeout calibration from
7977 "notice" to "info": they don't require or suggest any human
7978 intervention. Patch from Tom Lowenthal. Fixes bug 4063;
7979 bugfix on 0.2.2.14-alpha.
7982 - Turn on directory request statistics by default and include them in
7983 extra-info descriptors. Don't break if we have no GeoIP database.
7984 Backported from 0.2.3.1-alpha; implements ticket 3951.
7985 - Update to the October 4 2011 Maxmind GeoLite Country database.
7988 Changes in version 0.2.1.31 - 2011-10-26
7989 Tor 0.2.1.31 backports important security and privacy fixes for
7990 oldstable. This release is intended only for package maintainers and
7991 others who cannot use the 0.2.2 stable series. All others should be
7992 using Tor 0.2.2.x or newer.
7994 o Security fixes (also included in 0.2.2.x):
7995 - Replace all potentially sensitive memory comparison operations
7996 with versions whose runtime does not depend on the data being
7997 compared. This will help resist a class of attacks where an
7998 adversary can use variations in timing information to learn
7999 sensitive data. Fix for one case of bug 3122. (Safe memcmp
8000 implementation by Robert Ransom based partially on code by DJB.)
8001 - Fix an assert in parsing router descriptors containing IPv6
8002 addresses. This one took down the directory authorities when
8003 somebody tried some experimental code. Bugfix on 0.2.1.3-alpha.
8005 o Privacy/anonymity fixes (also included in 0.2.2.x):
8006 - Clients and bridges no longer send TLS certificate chains on
8007 outgoing OR connections. Previously, each client or bridge would
8008 use the same cert chain for all outgoing OR connections until
8009 its IP address changes, which allowed any relay that the client
8010 or bridge contacted to determine which entry guards it is using.
8011 Fixes CVE-2011-2768. Bugfix on 0.0.9pre5; found by "frosty_un".
8012 - If a relay receives a CREATE_FAST cell on a TLS connection, it
8013 no longer considers that connection as suitable for satisfying a
8014 circuit EXTEND request. Now relays can protect clients from the
8015 CVE-2011-2768 issue even if the clients haven't upgraded yet.
8016 - Bridges now refuse CREATE or CREATE_FAST cells on OR connections
8017 that they initiated. Relays could distinguish incoming bridge
8018 connections from client connections, creating another avenue for
8019 enumerating bridges. Fixes CVE-2011-2769. Bugfix on 0.2.0.3-alpha.
8020 Found by "frosty_un".
8021 - When receiving a hidden service descriptor, check that it is for
8022 the hidden service we wanted. Previously, Tor would store any
8023 hidden service descriptors that a directory gave it, whether it
8024 wanted them or not. This wouldn't have let an attacker impersonate
8025 a hidden service, but it did let directories pre-seed a client
8026 with descriptors that it didn't want. Bugfix on 0.0.6.
8027 - Avoid linkability based on cached hidden service descriptors: forget
8028 all hidden service descriptors cached as a client when processing a
8029 SIGNAL NEWNYM command. Fixes bug 3000; bugfix on 0.0.6.
8030 - Make the bridge directory authority refuse to answer directory
8031 requests for "all" descriptors. It used to include bridge
8032 descriptors in its answer, which was a major information leak.
8033 Found by "piebeer". Bugfix on 0.2.0.3-alpha.
8034 - Don't attach new streams to old rendezvous circuits after SIGNAL
8035 NEWNYM. Previously, we would keep using an existing rendezvous
8036 circuit if it remained open (i.e. if it were kept open by a
8037 long-lived stream, or if a new stream were attached to it before
8038 Tor could notice that it was old and no longer in use). Bugfix on
8039 0.1.1.15-rc; fixes bug 3375.
8041 o Minor bugfixes (also included in 0.2.2.x):
8042 - When we restart our relay, we might get a successful connection
8043 from the outside before we've started our reachability tests,
8044 triggering a warning: "ORPort found reachable, but I have no
8045 routerinfo yet. Failing to inform controller of success." This
8046 bug was harmless unless Tor is running under a controller
8047 like Vidalia, in which case the controller would never get a
8048 REACHABILITY_SUCCEEDED status event. Bugfix on 0.1.2.6-alpha;
8050 - Build correctly on OSX with zlib 1.2.4 and higher with all warnings
8051 enabled. Fixes bug 1526.
8052 - Remove undocumented option "-F" from tor-resolve: it hasn't done
8053 anything since 0.2.1.16-rc.
8054 - Avoid signed/unsigned comparisons by making SIZE_T_CEILING unsigned.
8055 None of the cases where we did this before were wrong, but by making
8056 this change we avoid warnings. Fixes bug 2475; bugfix on 0.2.1.28.
8057 - Fix a rare crash bug that could occur when a client was configured
8058 with a large number of bridges. Fixes bug 2629; bugfix on
8059 0.2.1.2-alpha. Bugfix by trac user "shitlei".
8060 - Correct the warning displayed when a rendezvous descriptor exceeds
8061 the maximum size. Fixes bug 2750; bugfix on 0.2.1.5-alpha. Found by
8063 - Fix an uncommon assertion failure when running with DNSPort under
8064 heavy load. Fixes bug 2933; bugfix on 0.2.0.1-alpha.
8065 - When warning about missing zlib development packages during compile,
8066 give the correct package names. Bugfix on 0.2.0.1-alpha.
8067 - Require that introduction point keys and onion keys have public
8068 exponent 65537. Bugfix on 0.2.0.10-alpha.
8069 - Do not crash when our configuration file becomes unreadable, for
8070 example due to a permissions change, between when we start up
8071 and when a controller calls SAVECONF. Fixes bug 3135; bugfix
8073 - Fix warnings from GCC 4.6's "-Wunused-but-set-variable" option.
8075 - Always NUL-terminate the sun_path field of a sockaddr_un before
8076 passing it to the kernel. (Not a security issue: kernels are
8077 smart enough to reject bad sockaddr_uns.) Found by Coverity;
8078 CID #428. Bugfix on Tor 0.2.0.3-alpha.
8079 - Don't stack-allocate the list of supplementary GIDs when we're
8080 about to log them. Stack-allocating NGROUPS_MAX gid_t elements
8081 could take up to 256K, which is way too much stack. Found by
8082 Coverity; CID #450. Bugfix on 0.2.1.7-alpha.
8084 o Minor bugfixes (only in 0.2.1.x):
8085 - Resume using micro-version numbers in 0.2.1.x: our Debian packages
8086 rely on them. Bugfix on 0.2.1.30.
8087 - Use git revisions instead of svn revisions when generating our
8088 micro-version numbers. Bugfix on 0.2.1.15-rc; fixes bug 2402.
8090 o Minor features (also included in 0.2.2.x):
8091 - Adjust the expiration time on our SSL session certificates to
8092 better match SSL certs seen in the wild. Resolves ticket 4014.
8093 - Allow nameservers with IPv6 address. Resolves bug 2574.
8094 - Update to the October 4 2011 Maxmind GeoLite Country database.
8097 Changes in version 0.2.3.5-alpha - 2011-09-28
8098 Tor 0.2.3.5-alpha fixes two bugs that make it possible to enumerate
8099 bridge relays; fixes an assertion error that many users started hitting
8100 today; and adds the ability to refill token buckets more often than
8101 once per second, allowing significant performance improvements.
8104 - Bridge relays now do their directory fetches inside Tor TLS
8105 connections, like all the other clients do, rather than connecting
8106 directly to the DirPort like public relays do. Removes another
8107 avenue for enumerating bridges. Fixes bug 4115; bugfix on 0.2.0.35.
8108 - Bridges relays now build circuits for themselves in a more similar
8109 way to how clients build them. Removes another avenue for
8110 enumerating bridges. Fixes bug 4124; bugfix on 0.2.0.3-alpha,
8111 when bridges were introduced.
8114 - Fix an "Assertion md->held_by_node == 1 failed" error that could
8115 occur when the same microdescriptor was referenced by two node_t
8116 objects at once. Fix for bug 4118; bugfix on Tor 0.2.3.1-alpha.
8118 o Major features (networking):
8119 - Add a new TokenBucketRefillInterval option to refill token buckets
8120 more frequently than once per second. This should improve network
8121 performance, alleviate queueing problems, and make traffic less
8122 bursty. Implements proposal 183; closes ticket 3630. Design by
8123 Florian Tschorsch and Björn Scheuermann; implementation by
8127 - Change an integer overflow check in the OpenBSD_Malloc code so
8128 that GCC is less likely to eliminate it as impossible. Patch
8129 from Mansour Moufid. Fixes bug 4059.
8131 o Minor bugfixes (usability):
8132 - Downgrade log messages about circuit timeout calibration from
8133 "notice" to "info": they don't require or suggest any human
8134 intervention. Patch from Tom Lowenthal. Fixes bug 4063;
8135 bugfix on 0.2.2.14-alpha.
8137 o Minor features (diagnostics):
8138 - When the system call to create a listener socket fails, log the
8139 error message explaining why. This may help diagnose bug 4027.
8142 Changes in version 0.2.3.4-alpha - 2011-09-13
8143 Tor 0.2.3.4-alpha includes the fixes from 0.2.2.33, including a slight
8144 tweak to Tor's TLS handshake that makes relays and bridges that run
8145 this new version reachable from Iran again. It also fixes a few new
8146 bugs in 0.2.3.x, and teaches relays to recognize when they're not
8147 listed in the network consensus and republish.
8149 o Major bugfixes (also part of 0.2.2.33):
8150 - Avoid an assertion failure when reloading a configuration with
8151 TrackExitHosts changes. Found and fixed by 'laruldan'. Fixes bug
8152 3923; bugfix on 0.2.2.25-alpha.
8154 o Minor features (security, also part of 0.2.2.33):
8155 - Check for replays of the public-key encrypted portion of an
8156 INTRODUCE1 cell, in addition to the current check for replays of
8157 the g^x value. This prevents a possible class of active attacks
8158 by an attacker who controls both an introduction point and a
8159 rendezvous point, and who uses the malleability of AES-CTR to
8160 alter the encrypted g^x portion of the INTRODUCE1 cell. We think
8161 that these attacks are infeasible (requiring the attacker to send
8162 on the order of zettabytes of altered cells in a short interval),
8163 but we'd rather block them off in case there are any classes of
8164 this attack that we missed. Reported by Willem Pinckaers.
8166 o Minor features (also part of 0.2.2.33):
8167 - Adjust the expiration time on our SSL session certificates to
8168 better match SSL certs seen in the wild. Resolves ticket 4014.
8169 - Change the default required uptime for a relay to be accepted as
8170 a HSDir (hidden service directory) from 24 hours to 25 hours.
8171 Improves on 0.2.0.10-alpha; resolves ticket 2649.
8172 - Add a VoteOnHidServDirectoriesV2 config option to allow directory
8173 authorities to abstain from voting on assignment of the HSDir
8174 consensus flag. Related to bug 2649.
8175 - Update to the September 6 2011 Maxmind GeoLite Country database.
8177 o Minor bugfixes (also part of 0.2.2.33):
8178 - Demote the 'replay detected' log message emitted when a hidden
8179 service receives the same Diffie-Hellman public key in two different
8180 INTRODUCE2 cells to info level. A normal Tor client can cause that
8181 log message during its normal operation. Bugfix on 0.2.1.6-alpha;
8182 fixes part of bug 2442.
8183 - Demote the 'INTRODUCE2 cell is too {old,new}' log message to info
8184 level. There is nothing that a hidden service's operator can do
8185 to fix its clients' clocks. Bugfix on 0.2.1.6-alpha; fixes part
8187 - Clarify a log message specifying the characters permitted in
8188 HiddenServiceAuthorizeClient client names. Previously, the log
8189 message said that "[A-Za-z0-9+-_]" were permitted; that could have
8190 given the impression that every ASCII character between "+" and "_"
8191 was permitted. Now we say "[A-Za-z0-9+_-]". Bugfix on 0.2.1.5-alpha.
8193 o Build fixes (also part of 0.2.2.33):
8194 - Clean up some code issues that prevented Tor from building on older
8195 BSDs. Fixes bug 3894; reported by "grarpamp".
8196 - Search for a platform-specific version of "ar" when cross-compiling.
8197 Should fix builds on iOS. Resolves bug 3909, found by Marco Bonetti.
8200 - Fix a bug where the SocksPort option (for example) would get
8201 ignored and replaced by the default if a SocksListenAddress
8202 option was set. Bugfix on 0.2.3.3-alpha; fixes bug 3936. Fix by
8206 - Relays now try regenerating and uploading their descriptor more
8207 frequently if they are not listed in the consensus, or if the
8208 version of their descriptor listed in the consensus is too
8209 old. This fix should prevent situations where a server declines
8210 to re-publish itself because it has done so too recently, even
8211 though the authorities decided not to list its recent-enough
8212 descriptor. Fix for bug 3327.
8215 - Relays now include a reason for regenerating their descriptors
8216 in an HTTP header when uploading to the authorities. This will
8217 make it easier to debug descriptor-upload issues in the future.
8218 - When starting as root and then changing our UID via the User
8219 control option, and we have a ControlSocket configured, make sure
8220 that the ControlSocket is owned by the same account that Tor will
8221 run under. Implements ticket 3421; fix by Jérémy Bobbio.
8224 - Abort if tor_vasprintf fails in connection_printf_to_buf (a
8225 utility function used in the control-port code). This shouldn't
8226 ever happen unless Tor is completely out of memory, but if it did
8227 happen and Tor somehow recovered from it, Tor could have sent a log
8228 message to a control port in the middle of a reply to a controller
8229 command. Fixes part of bug 3428; bugfix on 0.1.2.3-alpha.
8230 - Make 'FetchUselessDescriptors' cause all descriptor types and
8231 all consensus types (including microdescriptors) to get fetched.
8232 Fixes bug 3851; bugfix on 0.2.3.1-alpha.
8235 - Make a new "entry connection" struct as an internal subtype of "edge
8236 connection", to simplify the code and make exit connections smaller.
8239 Changes in version 0.2.2.33 - 2011-09-13
8240 Tor 0.2.2.33 fixes several bugs, and includes a slight tweak to Tor's
8241 TLS handshake that makes relays and bridges that run this new version
8242 reachable from Iran again.
8245 - Avoid an assertion failure when reloading a configuration with
8246 TrackExitHosts changes. Found and fixed by 'laruldan'. Fixes bug
8247 3923; bugfix on 0.2.2.25-alpha.
8249 o Minor features (security):
8250 - Check for replays of the public-key encrypted portion of an
8251 INTRODUCE1 cell, in addition to the current check for replays of
8252 the g^x value. This prevents a possible class of active attacks
8253 by an attacker who controls both an introduction point and a
8254 rendezvous point, and who uses the malleability of AES-CTR to
8255 alter the encrypted g^x portion of the INTRODUCE1 cell. We think
8256 that these attacks are infeasible (requiring the attacker to send
8257 on the order of zettabytes of altered cells in a short interval),
8258 but we'd rather block them off in case there are any classes of
8259 this attack that we missed. Reported by Willem Pinckaers.
8262 - Adjust the expiration time on our SSL session certificates to
8263 better match SSL certs seen in the wild. Resolves ticket 4014.
8264 - Change the default required uptime for a relay to be accepted as
8265 a HSDir (hidden service directory) from 24 hours to 25 hours.
8266 Improves on 0.2.0.10-alpha; resolves ticket 2649.
8267 - Add a VoteOnHidServDirectoriesV2 config option to allow directory
8268 authorities to abstain from voting on assignment of the HSDir
8269 consensus flag. Related to bug 2649.
8270 - Update to the September 6 2011 Maxmind GeoLite Country database.
8272 o Minor bugfixes (documentation and log messages):
8273 - Correct the man page to explain that HashedControlPassword and
8274 CookieAuthentication can both be set, in which case either method
8275 is sufficient to authenticate to Tor. Bugfix on 0.2.0.7-alpha,
8276 when we decided to allow these config options to both be set. Issue
8278 - Demote the 'replay detected' log message emitted when a hidden
8279 service receives the same Diffie-Hellman public key in two different
8280 INTRODUCE2 cells to info level. A normal Tor client can cause that
8281 log message during its normal operation. Bugfix on 0.2.1.6-alpha;
8282 fixes part of bug 2442.
8283 - Demote the 'INTRODUCE2 cell is too {old,new}' log message to info
8284 level. There is nothing that a hidden service's operator can do
8285 to fix its clients' clocks. Bugfix on 0.2.1.6-alpha; fixes part
8287 - Clarify a log message specifying the characters permitted in
8288 HiddenServiceAuthorizeClient client names. Previously, the log
8289 message said that "[A-Za-z0-9+-_]" were permitted; that could have
8290 given the impression that every ASCII character between "+" and "_"
8291 was permitted. Now we say "[A-Za-z0-9+_-]". Bugfix on 0.2.1.5-alpha.
8294 - Provide a substitute implementation of lround() for MSVC, which
8295 apparently lacks it. Patch from Gisle Vanem.
8296 - Clean up some code issues that prevented Tor from building on older
8297 BSDs. Fixes bug 3894; reported by "grarpamp".
8298 - Search for a platform-specific version of "ar" when cross-compiling.
8299 Should fix builds on iOS. Resolves bug 3909, found by Marco Bonetti.
8302 Changes in version 0.2.3.3-alpha - 2011-09-01
8303 Tor 0.2.3.3-alpha adds a new "stream isolation" feature to improve Tor's
8304 security, and provides client-side support for the microdescriptor
8305 and optimistic data features introduced earlier in the 0.2.3.x
8306 series. It also includes numerous critical bugfixes in the (optional)
8307 bufferevent-based networking backend.
8309 o Major features (stream isolation):
8310 - You can now configure Tor so that streams from different
8311 applications are isolated on different circuits, to prevent an
8312 attacker who sees your streams as they leave an exit node from
8313 linking your sessions to one another. To do this, choose some way
8314 to distinguish the applications: have them connect to different
8315 SocksPorts, or have one of them use SOCKS4 while the other uses
8316 SOCKS5, or have them pass different authentication strings to the
8317 SOCKS proxy. Then, use the new SocksPort syntax to configure the
8318 degree of isolation you need. This implements Proposal 171.
8319 - There's a new syntax for specifying multiple client ports (such as
8320 SOCKSPort, TransPort, DNSPort, NATDPort): you can now just declare
8321 multiple *Port entries with full addr:port syntax on each.
8322 The old *ListenAddress format is still supported, but you can't
8323 mix it with the new *Port syntax.
8325 o Major features (other):
8326 - Enable microdescriptor fetching by default for clients. This allows
8327 clients to download a much smaller amount of directory information.
8328 To disable it (and go back to the old-style consensus and
8329 descriptors), set "UseMicrodescriptors 0" in your torrc file.
8330 - Tor's firewall-helper feature, introduced in 0.2.3.1-alpha (see the
8331 "PortForwarding" config option), now supports Windows.
8332 - When using an exit relay running 0.2.3.x, clients can now
8333 "optimistically" send data before the exit relay reports that
8334 the stream has opened. This saves a round trip when starting
8335 connections where the client speaks first (such as web browsing).
8336 This behavior is controlled by a consensus parameter (currently
8337 disabled). To turn it on or off manually, use the "OptimisticData"
8338 torrc option. Implements proposal 181; code by Ian Goldberg.
8340 o Major bugfixes (bufferevents, fixes on 0.2.3.1-alpha):
8341 - When using IOCP on Windows, we need to enable Libevent windows
8343 - The IOCP backend now works even when the user has not specified
8344 the (internal, debugging-only) _UseFilteringSSLBufferevents option.
8345 Fixes part of bug 3752.
8346 - Correctly record the bytes we've read and written when using
8347 bufferevents, so that we can include them in our bandwidth history
8348 and advertised bandwidth. Fixes bug 3803.
8349 - Apply rate-limiting only at the bottom of a chain of filtering
8350 bufferevents. This prevents us from filling up internal read
8351 buffers and violating rate-limits when filtering bufferevents
8352 are enabled. Fixes part of bug 3804.
8353 - Add high-watermarks to the output buffers for filtered
8354 bufferevents. This prevents us from filling up internal write
8355 buffers and wasting CPU cycles when filtering bufferevents are
8356 enabled. Fixes part of bug 3804.
8357 - Correctly notice when data has been written from a bufferevent
8358 without flushing it completely. Fixes bug 3805.
8359 - Fix a bug where server-side tunneled bufferevent-based directory
8360 streams would get closed prematurely. Fixes bug 3814.
8361 - Fix a use-after-free error with per-connection rate-limiting
8362 buckets. Fixes bug 3888.
8364 o Major bugfixes (also part of 0.2.2.31-rc):
8365 - If we're configured to write our ControlPorts to disk, only write
8366 them after switching UID and creating the data directory. This way,
8367 we don't fail when starting up with a nonexistent DataDirectory
8368 and a ControlPortWriteToFile setting based on that directory. Fixes
8369 bug 3747; bugfix on Tor 0.2.2.26-beta.
8372 - Added a new CONF_CHANGED event so that controllers can be notified
8373 of any configuration changes made by other controllers, or by the
8374 user. Implements ticket 1692.
8375 - Use evbuffer_copyout() in inspect_evbuffer(). This fixes a memory
8376 leak when using bufferevents, and lets Libevent worry about how to
8377 best copy data out of a buffer.
8378 - Replace files in stats/ rather than appending to them. Now that we
8379 include statistics in extra-info descriptors, it makes no sense to
8380 keep old statistics forever. Implements ticket 2930.
8382 o Minor features (build compatibility):
8383 - Limited, experimental support for building with nmake and MSVC.
8384 - Provide a substitute implementation of lround() for MSVC, which
8385 apparently lacks it. Patch from Gisle Vanem.
8387 o Minor features (also part of 0.2.2.31-rc):
8388 - Update to the August 2 2011 Maxmind GeoLite Country database.
8390 o Minor bugfixes (on 0.2.3.x-alpha):
8391 - Fix a spurious warning when parsing SOCKS requests with
8392 bufferevents enabled. Fixes bug 3615; bugfix on 0.2.3.2-alpha.
8393 - Get rid of a harmless warning that could happen on relays running
8394 with bufferevents. The warning was caused by someone doing an http
8395 request to a relay's orport. Also don't warn for a few related
8396 non-errors. Fixes bug 3700; bugfix on 0.2.3.1-alpha.
8398 o Minor bugfixes (on 2.2.x and earlier):
8399 - Correct the man page to explain that HashedControlPassword and
8400 CookieAuthentication can both be set, in which case either method
8401 is sufficient to authenticate to Tor. Bugfix on 0.2.0.7-alpha,
8402 when we decided to allow these config options to both be set. Issue
8404 - The "--quiet" and "--hush" options now apply not only to Tor's
8405 behavior before logs are configured, but also to Tor's behavior in
8406 the absense of configured logs. Fixes bug 3550; bugfix on
8409 o Minor bugfixes (also part of 0.2.2.31-rc):
8410 - Write several files in text mode, on OSes that distinguish text
8411 mode from binary mode (namely, Windows). These files are:
8412 'buffer-stats', 'dirreq-stats', and 'entry-stats' on relays
8413 that collect those statistics; 'client_keys' and 'hostname' for
8414 hidden services that use authentication; and (in the tor-gencert
8415 utility) newly generated identity and signing keys. Previously,
8416 we wouldn't specify text mode or binary mode, leading to an
8417 assertion failure. Fixes bug 3607. Bugfix on 0.2.1.1-alpha (when
8418 the DirRecordUsageByCountry option which would have triggered
8419 the assertion failure was added), although this assertion failure
8420 would have occurred in tor-gencert on Windows in 0.2.0.1-alpha.
8421 - Selectively disable deprecation warnings on OS X because Lion
8422 started deprecating the shipped copy of openssl. Fixes bug 3643.
8423 - Remove an extra pair of quotation marks around the error
8424 message in control-port STATUS_GENERAL BUG events. Bugfix on
8425 0.1.2.6-alpha; fixes bug 3732.
8426 - When unable to format an address as a string, report its value
8427 as "???" rather than reusing the last formatted address. Bugfix
8430 o Code simplifications and refactoring:
8431 - Rewrite the listener-selection logic so that parsing which ports
8432 we want to listen on is now separate from binding to the ports
8436 - Building Tor with bufferevent support now requires Libevent
8437 2.0.13-stable or later. Previous versions of Libevent had bugs in
8438 SSL-related bufferevents and related issues that would make Tor
8439 work badly with bufferevents. Requiring 2.0.13-stable also allows
8440 Tor with bufferevents to take advantage of Libevent APIs
8441 introduced after 2.0.8-rc.
8444 Changes in version 0.2.2.32 - 2011-08-27
8445 The Tor 0.2.2 release series is dedicated to the memory of Andreas
8446 Pfitzmann (1958-2010), a pioneer in anonymity and privacy research,
8447 a founder of the PETS community, a leader in our field, a mentor,
8448 and a friend. He left us with these words: "I had the possibility
8449 to contribute to this world that is not as it should be. I hope I
8450 could help in some areas to make the world a better place, and that
8451 I could also encourage other people to be engaged in improving the
8452 world. Please, stay engaged. This world needs you, your love, your
8453 initiative -- now I cannot be part of that anymore."
8455 Tor 0.2.2.32, the first stable release in the 0.2.2 branch, is finally
8456 ready. More than two years in the making, this release features improved
8457 client performance and hidden service reliability, better compatibility
8458 for Android, correct behavior for bridges that listen on more than
8459 one address, more extensible and flexible directory object handling,
8460 better reporting of network statistics, improved code security, and
8461 many many other features and bugfixes.
8464 Changes in version 0.2.2.31-rc - 2011-08-17
8465 Tor 0.2.2.31-rc is the second and hopefully final release candidate
8466 for the Tor 0.2.2.x series.
8469 - Remove an extra pair of quotation marks around the error
8470 message in control-port STATUS_GENERAL BUG events. Bugfix on
8471 0.1.2.6-alpha; fixes bug 3732.
8472 - If we're configured to write our ControlPorts to disk, only write
8473 them after switching UID and creating the data directory. This way,
8474 we don't fail when starting up with a nonexistent DataDirectory
8475 and a ControlPortWriteToFile setting based on that directory. Fixes
8476 bug 3747; bugfix on Tor 0.2.2.26-beta.
8479 - Update to the August 2 2011 Maxmind GeoLite Country database.
8482 - Allow GETINFO fingerprint to return a fingerprint even when
8483 we have not yet built a router descriptor. Fixes bug 3577;
8484 bugfix on 0.2.0.1-alpha.
8485 - Write several files in text mode, on OSes that distinguish text
8486 mode from binary mode (namely, Windows). These files are:
8487 'buffer-stats', 'dirreq-stats', and 'entry-stats' on relays
8488 that collect those statistics; 'client_keys' and 'hostname' for
8489 hidden services that use authentication; and (in the tor-gencert
8490 utility) newly generated identity and signing keys. Previously,
8491 we wouldn't specify text mode or binary mode, leading to an
8492 assertion failure. Fixes bug 3607. Bugfix on 0.2.1.1-alpha (when
8493 the DirRecordUsageByCountry option which would have triggered
8494 the assertion failure was added), although this assertion failure
8495 would have occurred in tor-gencert on Windows in 0.2.0.1-alpha.
8496 - Selectively disable deprecation warnings on OS X because Lion
8497 started deprecating the shipped copy of openssl. Fixes bug 3643.
8498 - When unable to format an address as a string, report its value
8499 as "???" rather than reusing the last formatted address. Bugfix
8503 Changes in version 0.2.3.2-alpha - 2011-07-18
8504 Tor 0.2.3.2-alpha introduces two new experimental features:
8505 microdescriptors and pluggable transports. It also continues cleaning
8506 up a variety of recently introduced features.
8509 - Clients can now use microdescriptors instead of regular descriptors
8510 to build circuits. Microdescriptors are authority-generated
8511 summaries of regular descriptors' contents, designed to change
8512 very rarely (see proposal 158 for details). This feature is
8513 designed to save bandwidth, especially for clients on slow internet
8514 connections. It's off by default for now, since nearly no caches
8515 support it, but it will be on-by-default for clients in a future
8516 version. You can use the UseMicrodescriptors option to turn it on.
8517 - Tor clients using bridges can now be configured to use a separate
8518 'transport' proxy for each bridge. This approach helps to resist
8519 censorship by allowing bridges to use protocol obfuscation
8520 plugins. It implements part of proposal 180. Implements ticket 2841.
8521 - While we're trying to bootstrap, record how many TLS connections
8522 fail in each state, and report which states saw the most failures
8523 in response to any bootstrap failures. This feature may speed up
8524 diagnosis of censorship events. Implements ticket 3116.
8526 o Major bugfixes (on 0.2.3.1-alpha):
8527 - When configuring a large set of nodes in EntryNodes (as with
8528 'EntryNodes {cc}' or 'EntryNodes 1.1.1.1/16'), choose only a
8529 random subset to be guards, and choose them in random
8530 order. Fixes bug 2798.
8531 - Tor could crash when remembering a consensus in a non-used consensus
8532 flavor without having a current consensus set. Fixes bug 3361.
8533 - Comparing an unknown address to a microdescriptor's shortened exit
8534 policy would always give a "rejected" result. Fixes bug 3599.
8535 - Using microdescriptors as a client no longer prevents Tor from
8536 uploading and downloading hidden service descriptors. Fixes
8540 - Allow nameservers with IPv6 address. Resolves bug 2574.
8541 - Accept attempts to include a password authenticator in the
8542 handshake, as supported by SOCKS5. This handles SOCKS clients that
8543 don't know how to omit a password when authenticating. Resolves
8545 - When configuring a large set of nodes in EntryNodes, and there are
8546 enough of them listed as Guard so that we don't need to consider
8547 the non-guard entries, prefer the ones listed with the Guard flag.
8548 - Check for and recover from inconsistency in the microdescriptor
8549 cache. This will make it harder for us to accidentally free a
8550 microdescriptor without removing it from the appropriate data
8551 structures. Fixes issue 3135; issue noted by "wanoskarnet".
8552 - Log SSL state transitions at log level DEBUG, log domain
8553 HANDSHAKE. This can be useful for debugging censorship events.
8554 Implements ticket 3264.
8555 - Add port 6523 (Gobby) to LongLivedPorts. Patch by intrigeri;
8556 implements ticket 3439.
8558 o Minor bugfixes (on 0.2.3.1-alpha):
8559 - Do not free all general-purpose regular descriptors just
8560 because microdescriptor use is enabled. Fixes bug 3113.
8561 - Correctly link libevent_openssl when --enable-static-libevent
8562 is passed to configure. Fixes bug 3118.
8563 - Bridges should not complain during their heartbeat log messages that
8564 they are unlisted in the consensus: that's more or less the point
8565 of being a bridge. Fixes bug 3183.
8566 - Report a SIGNAL event to controllers when acting on a delayed
8567 SIGNAL NEWNYM command. Previously, we would report a SIGNAL
8568 event to the controller if we acted on a SIGNAL NEWNYM command
8569 immediately, and otherwise not report a SIGNAL event for the
8570 command at all. Fixes bug 3349.
8571 - Fix a crash when handling the SIGNAL controller command or
8572 reporting ERR-level status events with bufferevents enabled. Found
8573 by Robert Ransom. Fixes bug 3367.
8574 - Always ship the tor-fw-helper manpage in our release tarballs.
8575 Fixes bug 3389. Reported by Stephen Walker.
8576 - Fix a class of double-mark-for-close bugs when bufferevents
8577 are enabled. Fixes bug 3403.
8578 - Update tor-fw-helper to support libnatpmp-20110618. Fixes bug 3434.
8579 - Add SIGNAL to the list returned by the 'GETINFO events/names'
8580 control-port command. Fixes part of bug 3465.
8581 - Prevent using negative indices during unit test runs when read_all()
8582 fails. Spotted by coverity.
8583 - Fix a rare memory leak when checking the nodelist without it being
8584 present. Found by coverity.
8585 - Only try to download a microdescriptor-flavored consensus from
8586 a directory cache that provides them.
8588 o Minor bugfixes (on 0.2.2.x and earlier):
8589 - Assert that hidden-service-related operations are not performed
8590 using single-hop circuits. Previously, Tor would assert that
8591 client-side streams are not attached to single-hop circuits,
8592 but not that other sensitive operations on the client and service
8593 side are not performed using single-hop circuits. Fixes bug 3332;
8595 - Don't publish a new relay descriptor when we reload our onion key,
8596 unless the onion key has actually changed. Fixes bug 3263 and
8597 resolves another cause of bug 1810. Bugfix on 0.1.1.11-alpha.
8598 - Allow GETINFO fingerprint to return a fingerprint even when
8599 we have not yet built a router descriptor. Fixes bug 3577;
8600 bugfix on 0.2.0.1-alpha.
8601 - Make 'tor --digests' list hashes of all Tor source files. Bugfix
8602 on 0.2.2.4-alpha; fixes bug 3427.
8604 o Code simplification and refactoring:
8605 - Use tor_sscanf() in place of scanf() in more places through the
8606 code. This makes us a little more locale-independent, and
8607 should help shut up code-analysis tools that can't tell
8608 a safe sscanf string from a dangerous one.
8609 - Use tt_assert(), not tor_assert(), for checking for test failures.
8610 This makes the unit tests more able to go on in the event that
8612 - Split connection_about_to_close() into separate functions for each
8616 - On Windows, we now define the _WIN32_WINNT macros only if they
8617 are not already defined. This lets the person building Tor decide,
8618 if they want, to require a later version of Windows.
8621 Changes in version 0.2.2.30-rc - 2011-07-07
8622 Tor 0.2.2.30-rc is the first release candidate for the Tor 0.2.2.x
8623 series. It fixes a few smaller bugs, but generally appears stable.
8624 Please test it and let us know whether it is!
8627 - Send a SUCCEEDED stream event to the controller when a reverse
8628 resolve succeeded. Fixes bug 3536; bugfix on 0.0.8pre1. Issue
8629 discovered by katmagic.
8630 - Always NUL-terminate the sun_path field of a sockaddr_un before
8631 passing it to the kernel. (Not a security issue: kernels are
8632 smart enough to reject bad sockaddr_uns.) Found by Coverity;
8633 CID #428. Bugfix on Tor 0.2.0.3-alpha.
8634 - Don't stack-allocate the list of supplementary GIDs when we're
8635 about to log them. Stack-allocating NGROUPS_MAX gid_t elements
8636 could take up to 256K, which is way too much stack. Found by
8637 Coverity; CID #450. Bugfix on 0.2.1.7-alpha.
8638 - Add BUILDTIMEOUT_SET to the list returned by the 'GETINFO
8639 events/names' control-port command. Bugfix on 0.2.2.9-alpha;
8640 fixes part of bug 3465.
8641 - Fix a memory leak when receiving a descriptor for a hidden
8642 service we didn't ask for. Found by Coverity; CID #30. Bugfix
8646 - Update to the July 1 2011 Maxmind GeoLite Country database.
8649 Changes in version 0.2.2.29-beta - 2011-06-20
8650 Tor 0.2.2.29-beta reverts an accidental behavior change for users who
8651 have bridge lines in their torrc but don't want to use them; gets
8652 us closer to having the control socket feature working on Debian;
8653 and fixes a variety of smaller bugs.
8656 - Revert the UseBridges option to its behavior before 0.2.2.28-beta.
8657 When we changed the default behavior to "use bridges if any
8658 are listed in the torrc", we surprised users who had bridges
8659 in their torrc files but who didn't actually want to use them.
8660 Partial resolution for bug 3354.
8663 - Don't attach new streams to old rendezvous circuits after SIGNAL
8664 NEWNYM. Previously, we would keep using an existing rendezvous
8665 circuit if it remained open (i.e. if it were kept open by a
8666 long-lived stream, or if a new stream were attached to it before
8667 Tor could notice that it was old and no longer in use). Bugfix on
8668 0.1.1.15-rc; fixes bug 3375.
8671 - Fix a bug when using ControlSocketsGroupWritable with User. The
8672 directory's group would be checked against the current group, not
8673 the configured group. Patch by Jérémy Bobbio. Fixes bug 3393;
8674 bugfix on 0.2.2.26-beta.
8675 - Make connection_printf_to_buf()'s behavior sane. Its callers
8676 expect it to emit a CRLF iff the format string ends with CRLF;
8677 it actually emitted a CRLF iff (a) the format string ended with
8678 CRLF or (b) the resulting string was over 1023 characters long or
8679 (c) the format string did not end with CRLF *and* the resulting
8680 string was 1021 characters long or longer. Bugfix on 0.1.1.9-alpha;
8681 fixes part of bug 3407.
8682 - Make send_control_event_impl()'s behavior sane. Its callers
8683 expect it to always emit a CRLF at the end of the string; it
8684 might have emitted extra control characters as well. Bugfix on
8685 0.1.1.9-alpha; fixes another part of bug 3407.
8686 - Make crypto_rand_int() check the value of its input correctly.
8687 Previously, it accepted values up to UINT_MAX, but could return a
8688 negative number if given a value above INT_MAX+1. Found by George
8689 Kadianakis. Fixes bug 3306; bugfix on 0.2.2pre14.
8690 - Avoid a segfault when reading a malformed circuit build state
8691 with more than INT_MAX entries. Found by wanoskarnet. Bugfix on
8693 - When asked about a DNS record type we don't support via a
8694 client DNSPort, reply with NOTIMPL rather than an empty
8695 reply. Patch by intrigeri. Fixes bug 3369; bugfix on 2.0.1-alpha.
8696 - Fix a rare memory leak during stats writing. Found by coverity.
8699 - Update to the June 1 2011 Maxmind GeoLite Country database.
8701 o Code simplifications and refactoring:
8702 - Remove some dead code as indicated by coverity.
8703 - Remove a few dead assignments during router parsing. Found by
8705 - Add some forgotten return value checks during unit tests. Found
8707 - Don't use 1-bit wide signed bit fields. Found by coverity.
8710 Changes in version 0.2.2.28-beta - 2011-06-04
8711 Tor 0.2.2.28-beta makes great progress towards a new stable release: we
8712 fixed a big bug in whether relays stay in the consensus consistently,
8713 we moved closer to handling bridges and hidden services correctly,
8714 and we started the process of better handling the dreaded "my Vidalia
8715 died, and now my Tor demands a password when I try to reconnect to it"
8719 - Don't decide to make a new descriptor when receiving a HUP signal.
8720 This bug has caused a lot of 0.2.2.x relays to disappear from the
8721 consensus periodically. Fixes the most common case of triggering
8722 bug 1810; bugfix on 0.2.2.7-alpha.
8723 - Actually allow nameservers with IPv6 addresses. Fixes bug 2574.
8724 - Don't try to build descriptors if "ORPort auto" is set and we
8725 don't know our actual ORPort yet. Fix for bug 3216; bugfix on
8727 - Resolve a crash that occurred when setting BridgeRelay to 1 with
8728 accounting enabled. Fixes bug 3228; bugfix on 0.2.2.18-alpha.
8729 - Apply circuit timeouts to opened hidden-service-related circuits
8730 based on the correct start time. Previously, we would apply the
8731 circuit build timeout based on time since the circuit's creation;
8732 it was supposed to be applied based on time since the circuit
8733 entered its current state. Bugfix on 0.0.6; fixes part of bug 1297.
8734 - Use the same circuit timeout for client-side introduction
8735 circuits as for other four-hop circuits, rather than the timeout
8736 for single-hop directory-fetch circuits; the shorter timeout may
8737 have been appropriate with the static circuit build timeout in
8738 0.2.1.x and earlier, but caused many hidden service access attempts
8739 to fail with the adaptive CBT introduced in 0.2.2.2-alpha. Bugfix
8740 on 0.2.2.2-alpha; fixes another part of bug 1297.
8741 - In ticket 2511 we fixed a case where you could use an unconfigured
8742 bridge if you had configured it as a bridge the last time you ran
8743 Tor. Now fix another edge case: if you had configured it as a bridge
8744 but then switched to a different bridge via the controller, you
8745 would still be willing to use the old one. Bugfix on 0.2.0.1-alpha;
8749 - Add an __OwningControllerProcess configuration option and a
8750 TAKEOWNERSHIP control-port command. Now a Tor controller can ensure
8751 that when it exits, Tor will shut down. Implements feature 3049.
8752 - If "UseBridges 1" is set and no bridges are configured, Tor will
8753 now refuse to build any circuits until some bridges are set.
8754 If "UseBridges auto" is set, Tor will use bridges if they are
8755 configured and we are not running as a server, but otherwise will
8756 make circuits as usual. The new default is "auto". Patch by anonym,
8757 so the Tails LiveCD can stop automatically revealing you as a Tor
8761 - Fix warnings from GCC 4.6's "-Wunused-but-set-variable" option.
8762 - Remove a trailing asterisk from "exit-policy/default" in the
8763 output of the control port command "GETINFO info/names". Bugfix
8765 - Use a wide type to hold sockets when built for 64-bit Windows builds.
8767 - Warn when the user configures two HiddenServiceDir lines that point
8768 to the same directory. Bugfix on 0.0.6 (the version introducing
8769 HiddenServiceDir); fixes bug 3289.
8770 - Remove dead code from rend_cache_lookup_v2_desc_as_dir. Fixes
8771 part of bug 2748; bugfix on 0.2.0.10-alpha.
8772 - Log malformed requests for rendezvous descriptors as protocol
8773 warnings, not warnings. Also, use a more informative log message
8774 in case someone sees it at log level warning without prior
8775 info-level messages. Fixes the other part of bug 2748; bugfix
8777 - Clear the table recording the time of the last request for each
8778 hidden service descriptor from each HS directory on SIGNAL NEWNYM.
8779 Previously, we would clear our HS descriptor cache on SIGNAL
8780 NEWNYM, but if we had previously retrieved a descriptor (or tried
8781 to) from every directory responsible for it, we would refuse to
8782 fetch it again for up to 15 minutes. Bugfix on 0.2.2.25-alpha;
8784 - Fix a log message that said "bits" while displaying a value in
8785 bytes. Found by wanoskarnet. Fixes bug 3318; bugfix on
8787 - When checking for 1024-bit keys, check for 1024 bits, not 128
8788 bytes. This allows Tor to correctly discard keys of length 1017
8789 through 1023. Bugfix on 0.0.9pre5.
8792 - Relays now log the reason for publishing a new relay descriptor,
8793 so we have a better chance of hunting down instances of bug 1810.
8794 Resolves ticket 3252.
8795 - Revise most log messages that refer to nodes by nickname to
8796 instead use the "$key=nickname at address" format. This should be
8797 more useful, especially since nicknames are less and less likely
8798 to be unique. Resolves ticket 3045.
8799 - Log (at info level) when purging pieces of hidden-service-client
8800 state because of SIGNAL NEWNYM.
8803 - Remove undocumented option "-F" from tor-resolve: it hasn't done
8804 anything since 0.2.1.16-rc.
8807 Changes in version 0.2.2.27-beta - 2011-05-18
8808 Tor 0.2.2.27-beta fixes a bridge-related stability bug in the previous
8809 release, and also adds a few more general bugfixes.
8812 - Fix a crash bug when changing bridges in a running Tor process.
8813 Fixes bug 3213; bugfix on 0.2.2.26-beta.
8814 - When the controller configures a new bridge, don't wait 10 to 60
8815 seconds before trying to fetch its descriptor. Bugfix on
8816 0.2.0.3-alpha; fixes bug 3198 (suggested by 2355).
8819 - Require that onion keys have exponent 65537 in microdescriptors too.
8820 Fixes more of bug 3207; bugfix on 0.2.2.26-beta.
8821 - Tor used to limit HttpProxyAuthenticator values to 48 characters.
8822 Changed the limit to 512 characters by removing base64 newlines.
8823 Fixes bug 2752. Fix by Michael Yakubovich.
8824 - When a client starts or stops using bridges, never use a circuit
8825 that was built before the configuration change. This behavior could
8826 put at risk a user who uses bridges to ensure that her traffic
8827 only goes to the chosen addresses. Bugfix on 0.2.0.3-alpha; fixes
8831 Changes in version 0.2.2.26-beta - 2011-05-17
8832 Tor 0.2.2.26-beta fixes a variety of potential privacy problems. It
8833 also introduces a new "socksport auto" approach that should make it
8834 easier to run multiple Tors on the same system, and does a lot of
8835 cleanup to get us closer to a release candidate.
8837 o Security/privacy fixes:
8838 - Replace all potentially sensitive memory comparison operations
8839 with versions whose runtime does not depend on the data being
8840 compared. This will help resist a class of attacks where an
8841 adversary can use variations in timing information to learn
8842 sensitive data. Fix for one case of bug 3122. (Safe memcmp
8843 implementation by Robert Ransom based partially on code by DJB.)
8844 - When receiving a hidden service descriptor, check that it is for
8845 the hidden service we wanted. Previously, Tor would store any
8846 hidden service descriptors that a directory gave it, whether it
8847 wanted them or not. This wouldn't have let an attacker impersonate
8848 a hidden service, but it did let directories pre-seed a client
8849 with descriptors that it didn't want. Bugfix on 0.0.6.
8850 - On SIGHUP, do not clear out all TrackHostExits mappings, client
8851 DNS cache entries, and virtual address mappings: that's what
8852 NEWNYM is for. Fixes bug 1345; bugfix on 0.1.0.1-rc.
8855 - The options SocksPort, ControlPort, and so on now all accept a
8856 value "auto" that opens a socket on an OS-selected port. A
8857 new ControlPortWriteToFile option tells Tor to write its
8858 actual control port or ports to a chosen file. If the option
8859 ControlPortFileGroupReadable is set, the file is created as
8860 group-readable. Now users can run two Tor clients on the same
8861 system without needing to manually mess with parameters. Resolves
8862 part of ticket 3076.
8863 - Set SO_REUSEADDR on all sockets, not just listeners. This should
8864 help busy exit nodes avoid running out of useable ports just
8865 because all the ports have been used in the near past. Resolves
8869 - New "GETINFO net/listeners/(type)" controller command to return
8870 a list of addresses and ports that are bound for listeners for a
8871 given connection type. This is useful when the user has configured
8872 "SocksPort auto" and the controller needs to know which port got
8873 chosen. Resolves another part of ticket 3076.
8874 - Add a new ControlSocketsGroupWritable configuration option: when
8875 it is turned on, ControlSockets are group-writeable by the default
8876 group of the current user. Patch by Jérémy Bobbio; implements
8878 - Tor now refuses to create a ControlSocket in a directory that is
8879 world-readable (or group-readable if ControlSocketsGroupWritable
8880 is 0). This is necessary because some operating systems do not
8881 enforce permissions on an AF_UNIX sockets. Permissions on the
8882 directory holding the socket, however, seems to work everywhere.
8883 - Rate-limit a warning about failures to download v2 networkstatus
8884 documents. Resolves part of bug 1352.
8885 - Backport code from 0.2.3.x that allows directory authorities to
8886 clean their microdescriptor caches. Needed to resolve bug 2230.
8887 - When an HTTPS proxy reports "403 Forbidden", we now explain
8888 what it means rather than calling it an unexpected status code.
8889 Closes bug 2503. Patch from Michael Yakubovich.
8890 - Update to the May 1 2011 Maxmind GeoLite Country database.
8893 - Authorities now clean their microdesc cache periodically and when
8894 reading from disk initially, not only when adding new descriptors.
8895 This prevents a bug where we could lose microdescriptors. Bugfix
8896 on 0.2.2.6-alpha. Fixes bug 2230.
8897 - Do not crash when our configuration file becomes unreadable, for
8898 example due to a permissions change, between when we start up
8899 and when a controller calls SAVECONF. Fixes bug 3135; bugfix
8901 - Avoid a bug that would keep us from replacing a microdescriptor
8902 cache on Windows. (We would try to replace the file while still
8903 holding it open. That's fine on Unix, but Windows doesn't let us
8904 do that.) Bugfix on 0.2.2.6-alpha; bug found by wanoskarnet.
8905 - Add missing explanations for the authority-related torrc options
8906 RephistTrackTime, BridgePassword, and V3AuthUseLegacyKey in the
8907 man page. Resolves issue 2379.
8908 - As an authority, do not upload our own vote or signature set to
8909 ourself. It would tell us nothing new, and as of 0.2.2.24-alpha,
8910 it would get flagged as a duplicate. Resolves bug 3026.
8911 - Accept hidden service descriptors if we think we might be a hidden
8912 service directory, regardless of what our consensus says. This
8913 helps robustness, since clients and hidden services can sometimes
8914 have a more up-to-date view of the network consensus than we do,
8915 and if they think that the directory authorities list us a HSDir,
8916 we might actually be one. Related to bug 2732; bugfix on
8918 - When a controller changes TrackHostExits, remove mappings for
8919 hosts that should no longer have their exits tracked. Bugfix on
8921 - When a controller changes VirtualAddrNetwork, remove any mappings
8922 for hosts that were automapped to the old network. Bugfix on
8924 - When a controller changes one of the AutomapHosts* options, remove
8925 any mappings for hosts that should no longer be automapped. Bugfix
8927 - Do not reset the bridge descriptor download status every time we
8928 re-parse our configuration or get a configuration change. Fixes
8929 bug 3019; bugfix on 0.2.0.3-alpha.
8931 o Minor bugfixes (code cleanup):
8932 - When loading the microdesc journal, remember its current size.
8933 In 0.2.2, this helps prevent the microdesc journal from growing
8934 without limit on authorities (who are the only ones to use it in
8935 0.2.2). Fixes a part of bug 2230; bugfix on 0.2.2.6-alpha.
8936 Fix posted by "cypherpunks."
8937 - The microdesc journal is supposed to get rebuilt only if it is
8938 at least _half_ the length of the store, not _twice_ the length
8939 of the store. Bugfix on 0.2.2.6-alpha; fixes part of bug 2230.
8940 - Fix a potential null-pointer dereference while computing a
8941 consensus. Bugfix on tor-0.2.0.3-alpha, found with the help of
8943 - Avoid a possible null-pointer dereference when rebuilding the mdesc
8944 cache without actually having any descriptors to cache. Bugfix on
8945 0.2.2.6-alpha. Issue discovered using clang's static analyzer.
8946 - If we fail to compute the identity digest of a v3 legacy keypair,
8947 warn, and don't use a buffer-full of junk instead. Bugfix on
8948 0.2.1.1-alpha; fixes bug 3106.
8949 - Resolve an untriggerable issue in smartlist_string_num_isin(),
8950 where if the function had ever in the future been used to check
8951 for the presence of a too-large number, it would have given an
8952 incorrect result. (Fortunately, we only used it for 16-bit
8953 values.) Fixes bug 3175; bugfix on 0.1.0.1-rc.
8954 - Require that introduction point keys and onion handshake keys
8955 have a public exponent of 65537. Starts to fix bug 3207; bugfix
8959 - Caches no longer download and serve v2 networkstatus documents
8960 unless FetchV2Networkstatus flag is set: these documents haven't
8961 haven't been used by clients or relays since 0.2.0.x. Resolves
8965 Changes in version 0.2.3.1-alpha - 2011-05-05
8966 Tor 0.2.3.1-alpha adds some new experimental features, including support
8967 for an improved network IO backend, IOCP networking on Windows,
8968 microdescriptor caching, "fast-start" support for streams, and automatic
8969 home router configuration. There are also numerous internal improvements
8970 to try to make the code easier for developers to work with.
8972 This is the first alpha release in a new series, so expect there to be
8973 bugs. Users who would rather test out a more stable branch should
8974 stay with 0.2.2.x for now.
8977 - Tor can now optionally build with the "bufferevents" buffered IO
8978 backend provided by Libevent 2. To use this feature, make sure you
8979 have the latest possible version of Libevent, and pass the
8980 --enable-bufferevents flag to configure when building Tor from
8981 source. This feature will make our networking code more flexible,
8982 let us stack layers on each other, and let us use more efficient
8983 zero-copy transports where available.
8984 - As an experimental feature, Tor can use IOCP for networking on Windows.
8985 Once this code is tuned and optimized, it promises much better
8986 performance than the select-based backend we've used in the past. To
8987 try this feature, you must build Tor with Libevent 2, configure Tor
8988 with the "bufferevents" buffered IO backend, and add "DisableIOCP 0" to
8989 your torrc. There are known bugs here: only try this if you can help
8990 debug it as it breaks.
8991 - The EntryNodes option can now include country codes like {de} or IP
8992 addresses or network masks. Previously we had disallowed these options
8993 because we didn't have an efficient way to keep the list up to
8994 date. Fixes bug 1982, but see bug 2798 for an unresolved issue here.
8995 - Exit nodes now accept and queue data on not-yet-connected streams.
8996 Previously, the client wasn't allowed to send data until the stream was
8997 connected, which slowed down all connections. This change will enable
8998 clients to perform a "fast-start" on streams and send data without
8999 having to wait for a confirmation that the stream has opened. (Patch
9000 from Ian Goldberg; implements the server side of Proposal 174.)
9001 - Tor now has initial support for automatic port mapping on the many
9002 home routers that support NAT-PMP or UPnP. (Not yet supported on
9003 Windows). To build the support code, you'll need to have libnatpnp
9004 library and/or the libminiupnpc library, and you'll need to enable the
9005 feature specifically by passing "--enable-upnp" and/or
9006 "--enable-natpnp" to configure. To turn it on, use the new
9007 PortForwarding option.
9008 - Caches now download, cache, and serve multiple "flavors" of the
9009 consensus, including a flavor that describes microdescriptors.
9010 - Caches now download, cache, and serve microdescriptors -- small
9011 summaries of router descriptors that are authenticated by all of the
9012 directory authorities. Once enough caches are running this code,
9013 clients will be able to save significant amounts of directory bandwidth
9014 by downloading microdescriptors instead of router descriptors.
9017 - Make logging resolution configurable with a new LogTimeGranularity
9018 option, and change the default from 1 millisecond to 1 second.
9019 Implements enhancement 1668.
9020 - We log which torrc file we're using on startup. Implements ticket
9022 - Ordinarily, Tor does not count traffic from private addresses (like
9023 127.0.0.1 or 10.0.0.1) when calculating rate limits or accounting.
9024 There is now a new option, CountPrivateBandwidth, to disable this
9025 behavior. Patch from Daniel Cagara.
9026 - New --enable-static-tor configure option for building Tor as
9027 statically as possible. Idea, general hackery and thoughts from
9028 Alexei Czeskis, John Gilmore, Jacob Appelbaum. Implements ticket
9030 - If you set the NumCPUs option to 0, Tor will now try to detect how
9031 many CPUs you have. This is the new default behavior.
9032 - Turn on directory request statistics by default and include them in
9033 extra-info descriptors. Don't break if we have no GeoIP database.
9034 - Relays that set "ConnDirectionStatistics 1" write statistics on the
9035 bidirectional use of connections to disk every 24 hours.
9036 - Add a GeoIP file digest to the extra-info descriptor. Implements
9038 - The NodeFamily option -- which let you declare that you want to
9039 consider nodes to be part of a family whether they list themselves
9040 that way or not -- now allows IP address ranges and country codes.
9041 - Add a new 'Heartbeat' log message type to periodically log a message
9042 describing Tor's status at level Notice. This feature is meant for
9043 operators who log at notice, and want to make sure that their Tor
9044 server is still working. Implementation by George Kadianakis.
9046 o Minor bugfixes (on 0.2.2.25-alpha):
9047 - When loading the microdesc journal, remember its current size.
9048 In 0.2.2, this helps prevent the microdesc journal from growing
9049 without limit on authorities (who are the only ones to use it in
9050 0.2.2). Fixes a part of bug 2230; bugfix on 0.2.2.6-alpha.
9051 Fix posted by "cypherpunks."
9052 - The microdesc journal is supposed to get rebuilt only if it is
9053 at least _half_ the length of the store, not _twice_ the length
9054 of the store. Bugfix on 0.2.2.6-alpha; fixes part of bug 2230.
9055 - If as an authority we fail to compute the identity digest of a v3
9056 legacy keypair, warn, and don't use a buffer-full of junk instead.
9057 Bugfix on 0.2.1.1-alpha; fixes bug 3106.
9058 - Authorities now clean their microdesc cache periodically and when
9059 reading from disk initially, not only when adding new descriptors.
9060 This prevents a bug where we could lose microdescriptors. Bugfix
9063 o Minor features (controller):
9064 - Add a new SIGNAL event to the controller interface so that
9065 controllers can be notified when Tor handles a signal. Resolves
9066 issue 1955. Patch by John Brooks.
9067 - Add a new GETINFO option to get total bytes read and written. Patch
9068 from pipe, revised by atagar. Resolves ticket 2345.
9069 - Implement some GETINFO controller fields to provide information about
9070 the Tor process's pid, euid, username, and resource limits.
9073 - Our build system requires automake 1.6 or later to create the
9074 Makefile.in files. Previously, you could have used 1.4.
9075 This only affects developers and people building Tor from git;
9076 people who build Tor from the source distribution without changing
9077 the Makefile.am files should be fine.
9078 - Our autogen.sh script uses autoreconf to launch autoconf, automake, and
9079 so on. This is more robust against some of the failure modes
9080 associated with running the autotools pieces on their own.
9082 o Minor packaging issues:
9083 - On OpenSUSE, create the /var/run/tor directory on startup if it is not
9084 already created. Patch from Andreas Stieger. Fixes bug 2573.
9086 o Code simplifications and refactoring:
9087 - A major revision to our internal node-selecting and listing logic.
9088 Tor already had at least two major ways to look at the question of
9089 "which Tor servers do we know about": a list of router descriptors,
9090 and a list of entries in the current consensus. With
9091 microdescriptors, we're adding a third. Having so many systems
9092 without an abstraction layer over them was hurting the codebase.
9093 Now, we have a new "node_t" abstraction that presents a consistent
9094 interface to a client's view of a Tor node, and holds (nearly) all
9095 of the mutable state formerly in routerinfo_t and routerstatus_t.
9096 - The helper programs tor-gencert, tor-resolve, and tor-checkkey
9097 no longer link against Libevent: they never used it, but
9098 our library structure used to force them to link it.
9101 - Remove some old code to work around even older versions of Tor that
9102 used forked processes to handle DNS requests. Such versions of Tor
9103 are no longer in use as servers.
9105 o Documentation fixes:
9106 - Correct a broken faq link in the INSTALL file. Fixes bug 2307.
9107 - Add missing documentation for the authority-related torrc options
9108 RephistTrackTime, BridgePassword, and V3AuthUseLegacyKey. Resolves
9112 Changes in version 0.2.2.25-alpha - 2011-04-29
9113 Tor 0.2.2.25-alpha fixes many bugs: hidden service clients are more
9114 robust, routers no longer overreport their bandwidth, Win7 should crash
9115 a little less, and NEWNYM (as used by Vidalia's "new identity" button)
9116 now prevents hidden service-related activity from being linkable. It
9117 provides more information to Vidalia so you can see if your bridge is
9118 working. Also, 0.2.2.25-alpha revamps the Entry/Exit/ExcludeNodes and
9119 StrictNodes configuration options to make them more reliable, more
9120 understandable, and more regularly applied. If you use those options,
9121 please see the revised documentation for them in the manual page.
9124 - Relays were publishing grossly inflated bandwidth values because
9125 they were writing their state files wrong--now they write the
9126 correct value. Also, resume reading bandwidth history from the
9127 state file correctly. Fixes bug 2704; bugfix on 0.2.2.23-alpha.
9128 - Improve hidden service robustness: When we find that we have
9129 extended a hidden service's introduction circuit to a relay not
9130 listed as an introduction point in the HS descriptor we currently
9131 have, retry with an introduction point from the current
9132 descriptor. Previously we would just give up. Fixes bugs 1024 and
9133 1930; bugfix on 0.2.0.10-alpha.
9134 - Clients now stop trying to use an exit node associated with a given
9135 destination by TrackHostExits if they fail to reach that exit node.
9136 Fixes bug 2999. Bugfix on 0.2.0.20-rc.
9137 - Fix crash bug on platforms where gmtime and localtime can return
9138 NULL. Windows 7 users were running into this one. Fixes part of bug
9139 2077. Bugfix on all versions of Tor. Found by boboper.
9141 o Security and stability fixes:
9142 - Don't double-free a parsable, but invalid, microdescriptor, even if
9143 it is followed in the blob we're parsing by an unparsable
9144 microdescriptor. Fixes an issue reported in a comment on bug 2954.
9145 Bugfix on 0.2.2.6-alpha; fix by "cypherpunks".
9146 - If the Nickname configuration option isn't given, Tor would pick a
9147 nickname based on the local hostname as the nickname for a relay.
9148 Because nicknames are not very important in today's Tor and the
9149 "Unnamed" nickname has been implemented, this is now problematic
9150 behavior: It leaks information about the hostname without being
9151 useful at all. Fixes bug 2979; bugfix on 0.1.2.2-alpha, which
9152 introduced the Unnamed nickname. Reported by tagnaq.
9153 - Fix an uncommon assertion failure when running with DNSPort under
9154 heavy load. Fixes bug 2933; bugfix on 0.2.0.1-alpha.
9155 - Avoid linkability based on cached hidden service descriptors: forget
9156 all hidden service descriptors cached as a client when processing a
9157 SIGNAL NEWNYM command. Fixes bug 3000; bugfix on 0.0.6.
9160 - Export GeoIP information on bridge usage to controllers even if we
9161 have not yet been running for 24 hours. Now Vidalia bridge operators
9162 can get more accurate and immediate feedback about their
9163 contributions to the network.
9165 o Major features and bugfixes (node selection):
9166 - Revise and reconcile the meaning of the ExitNodes, EntryNodes,
9167 ExcludeEntryNodes, ExcludeExitNodes, ExcludeNodes, and StrictNodes
9168 options. Previously, we had been ambiguous in describing what
9169 counted as an "exit" node, and what operations exactly "StrictNodes
9170 0" would permit. This created confusion when people saw nodes built
9171 through unexpected circuits, and made it hard to tell real bugs from
9172 surprises. Now the intended behavior is:
9173 . "Exit", in the context of ExitNodes and ExcludeExitNodes, means
9174 a node that delivers user traffic outside the Tor network.
9175 . "Entry", in the context of EntryNodes, means a node used as the
9176 first hop of a multihop circuit. It doesn't include direct
9177 connections to directory servers.
9178 . "ExcludeNodes" applies to all nodes.
9179 . "StrictNodes" changes the behavior of ExcludeNodes only. When
9180 StrictNodes is set, Tor should avoid all nodes listed in
9181 ExcludeNodes, even when it will make user requests fail. When
9182 StrictNodes is *not* set, then Tor should follow ExcludeNodes
9183 whenever it can, except when it must use an excluded node to
9184 perform self-tests, connect to a hidden service, provide a
9185 hidden service, fulfill a .exit request, upload directory
9186 information, or fetch directory information.
9187 Collectively, the changes to implement the behavior fix bug 1090.
9188 - ExcludeNodes now takes precedence over EntryNodes and ExitNodes: if
9189 a node is listed in both, it's treated as excluded.
9190 - ExcludeNodes now applies to directory nodes -- as a preference if
9191 StrictNodes is 0, or an absolute requirement if StrictNodes is 1.
9192 Don't exclude all the directory authorities and set StrictNodes to 1
9193 unless you really want your Tor to break.
9194 - ExcludeNodes and ExcludeExitNodes now override exit enclaving.
9195 - ExcludeExitNodes now overrides .exit requests.
9196 - We don't use bridges listed in ExcludeNodes.
9197 - When StrictNodes is 1:
9198 . We now apply ExcludeNodes to hidden service introduction points
9199 and to rendezvous points selected by hidden service users. This
9200 can make your hidden service less reliable: use it with caution!
9201 . If we have used ExcludeNodes on ourself, do not try relay
9202 reachability self-tests.
9203 . If we have excluded all the directory authorities, we will not
9204 even try to upload our descriptor if we're a relay.
9205 . Do not honor .exit requests to an excluded node.
9206 - Remove a misfeature that caused us to ignore the Fast/Stable flags
9207 when ExitNodes is set. Bugfix on 0.2.2.7-alpha.
9208 - When the set of permitted nodes changes, we now remove any mappings
9209 introduced via TrackExitHosts to now-excluded nodes. Bugfix on
9211 - We never cannibalize a circuit that had excluded nodes on it, even
9212 if StrictNodes is 0. Bugfix on 0.1.0.1-rc.
9213 - Revert a change where we would be laxer about attaching streams to
9214 circuits than when building the circuits. This was meant to prevent
9215 a set of bugs where streams were never attachable, but our improved
9216 code here should make this unnecessary. Bugfix on 0.2.2.7-alpha.
9217 - Keep track of how many times we launch a new circuit to handle a
9218 given stream. Too many launches could indicate an inconsistency
9219 between our "launch a circuit to handle this stream" logic and our
9220 "attach this stream to one of the available circuits" logic.
9221 - Improve log messages related to excluded nodes.
9224 - Fix a spurious warning when moving from a short month to a long
9225 month on relays with month-based BandwidthAccounting. Bugfix on
9226 0.2.2.17-alpha; fixes bug 3020.
9227 - When a client finds that an origin circuit has run out of 16-bit
9228 stream IDs, we now mark it as unusable for new streams. Previously,
9229 we would try to close the entire circuit. Bugfix on 0.0.6.
9230 - Add a forgotten cast that caused a compile warning on OS X 10.6.
9231 Bugfix on 0.2.2.24-alpha.
9232 - Be more careful about reporting the correct error from a failed
9233 connect() system call. Under some circumstances, it was possible to
9234 look at an incorrect value for errno when sending the end reason.
9235 Bugfix on 0.1.0.1-rc.
9236 - Correctly handle an "impossible" overflow cases in connection byte
9237 counting, where we write or read more than 4GB on an edge connection
9238 in a single second. Bugfix on 0.1.2.8-beta.
9239 - Correct the warning displayed when a rendezvous descriptor exceeds
9240 the maximum size. Fixes bug 2750; bugfix on 0.2.1.5-alpha. Found by
9242 - Clients and hidden services now use HSDir-flagged relays for hidden
9243 service descriptor downloads and uploads even if the relays have no
9244 DirPort set and the client has disabled TunnelDirConns. This will
9245 eventually allow us to give the HSDir flag to relays with no
9246 DirPort. Fixes bug 2722; bugfix on 0.2.1.6-alpha.
9247 - Downgrade "no current certificates known for authority" message from
9248 Notice to Info. Fixes bug 2899; bugfix on 0.2.0.10-alpha.
9249 - Make the SIGNAL DUMP control-port command work on FreeBSD. Fixes bug
9250 2917. Bugfix on 0.1.1.1-alpha.
9251 - Only limit the lengths of single HS descriptors, even when multiple
9252 HS descriptors are published to an HSDir relay in a single POST
9253 operation. Fixes bug 2948; bugfix on 0.2.1.5-alpha. Found by hsdir.
9254 - Write the current time into the LastWritten line in our state file,
9255 rather than the time from the previous write attempt. Also, stop
9256 trying to use a time of -1 in our log statements. Fixes bug 3039;
9257 bugfix on 0.2.2.14-alpha.
9258 - Be more consistent in our treatment of file system paths. "~" should
9259 get expanded to the user's home directory in the Log config option.
9260 Fixes bug 2971; bugfix on 0.2.0.1-alpha, which introduced the
9261 feature for the -f and --DataDirectory options.
9264 - Make sure every relay writes a state file at least every 12 hours.
9265 Previously, a relay could go for weeks without writing its state
9266 file, and on a crash could lose its bandwidth history, capacity
9267 estimates, client country statistics, and so on. Addresses bug 3012.
9268 - Send END_STREAM_REASON_NOROUTE in response to EHOSTUNREACH errors.
9269 Clients before 0.2.1.27 didn't handle NOROUTE correctly, but such
9270 clients are already deprecated because of security bugs.
9271 - Don't allow v0 hidden service authorities to act as clients.
9272 Required by fix for bug 3000.
9273 - Ignore SIGNAL NEWNYM commands on relay-only Tor instances. Required
9274 by fix for bug 3000.
9275 - Ensure that no empty [dirreq-](read|write)-history lines are added
9276 to an extrainfo document. Implements ticket 2497.
9278 o Code simplification and refactoring:
9279 - Remove workaround code to handle directory responses from servers
9280 that had bug 539 (they would send HTTP status 503 responses _and_
9281 send a body too). Since only server versions before
9282 0.2.0.16-alpha/0.1.2.19 were affected, there is no longer reason to
9283 keep the workaround in place.
9284 - Remove the old 'fuzzy time' logic. It was supposed to be used for
9285 handling calculations where we have a known amount of clock skew and
9286 an allowed amount of unknown skew. But we only used it in three
9287 places, and we never adjusted the known/unknown skew values. This is
9288 still something we might want to do someday, but if we do, we'll
9289 want to do it differently.
9290 - Avoid signed/unsigned comparisons by making SIZE_T_CEILING unsigned.
9291 None of the cases where we did this before were wrong, but by making
9292 this change we avoid warnings. Fixes bug 2475; bugfix on 0.2.1.28.
9293 - Use GetTempDir to find the proper temporary directory location on
9294 Windows when generating temporary files for the unit tests. Patch by
9298 Changes in version 0.2.2.24-alpha - 2011-04-08
9299 Tor 0.2.2.24-alpha fixes a variety of bugs, including a big bug that
9300 prevented Tor clients from effectively using "multihomed" bridges,
9301 that is, bridges that listen on multiple ports or IP addresses so users
9302 can continue to use some of their addresses even if others get blocked.
9305 - Fix a bug where bridge users who configure the non-canonical
9306 address of a bridge automatically switch to its canonical
9307 address. If a bridge listens at more than one address, it should be
9308 able to advertise those addresses independently and any non-blocked
9309 addresses should continue to work. Bugfix on Tor 0.2.0.x. Fixes
9311 - If you configured Tor to use bridge A, and then quit and
9312 configured Tor to use bridge B instead, it would happily continue
9313 to use bridge A if it's still reachable. While this behavior is
9314 a feature if your goal is connectivity, in some scenarios it's a
9315 dangerous bug. Bugfix on Tor 0.2.0.1-alpha; fixes bug 2511.
9316 - Directory authorities now use data collected from their own
9317 uptime observations when choosing whether to assign the HSDir flag
9318 to relays, instead of trusting the uptime value the relay reports in
9319 its descriptor. This change helps prevent an attack where a small
9320 set of nodes with frequently-changing identity keys can blackhole
9321 a hidden service. (Only authorities need upgrade; others will be
9322 fine once they do.) Bugfix on 0.2.0.10-alpha; fixes bug 2709.
9325 - When we restart our relay, we might get a successful connection
9326 from the outside before we've started our reachability tests,
9327 triggering a warning: "ORPort found reachable, but I have no
9328 routerinfo yet. Failing to inform controller of success." This
9329 bug was harmless unless Tor is running under a controller
9330 like Vidalia, in which case the controller would never get a
9331 REACHABILITY_SUCCEEDED status event. Bugfix on 0.1.2.6-alpha;
9333 - Make directory authorities more accurate at recording when
9334 relays that have failed several reachability tests became
9335 unreachable, so we can provide more accuracy at assigning Stable,
9336 Guard, HSDir, etc flags. Bugfix on 0.2.0.6-alpha. Resolves bug 2716.
9337 - Fix an issue that prevented static linking of libevent on
9338 some platforms (notably Linux). Fixes bug 2698; bugfix on
9339 versions 0.2.1.23/0.2.2.8-alpha (the versions introducing
9340 the --with-static-libevent configure option).
9341 - We now ask the other side of a stream (the client or the exit)
9342 for more data on that stream when the amount of queued data on
9343 that stream dips low enough. Previously, we wouldn't ask the
9344 other side for more data until either it sent us more data (which
9345 it wasn't supposed to do if it had exhausted its window!) or we
9346 had completely flushed all our queued data. This flow control fix
9347 should improve throughput. Fixes bug 2756; bugfix on the earliest
9348 released versions of Tor (svn commit r152).
9349 - Avoid a double-mark-for-free warning when failing to attach a
9350 transparent proxy connection. (We thought we had fixed this in
9351 0.2.2.23-alpha, but it turns out our fix was checking the wrong
9352 connection.) Fixes bug 2757; bugfix on 0.1.2.1-alpha (the original
9353 bug) and 0.2.2.23-alpha (the incorrect fix).
9354 - When warning about missing zlib development packages during compile,
9355 give the correct package names. Bugfix on 0.2.0.1-alpha.
9358 - Directory authorities now log the source of a rejected POSTed v3
9360 - Make compilation with clang possible when using
9361 --enable-gcc-warnings by removing two warning options that clang
9362 hasn't implemented yet and by fixing a few warnings. Implements
9364 - When expiring circuits, use microsecond timers rather than
9365 one-second timers. This can avoid an unpleasant situation where a
9366 circuit is launched near the end of one second and expired right
9367 near the beginning of the next, and prevent fluctuations in circuit
9369 - Use computed circuit-build timeouts to decide when to launch
9370 parallel introduction circuits for hidden services. (Previously,
9371 we would retry after 15 seconds.)
9372 - Update to the April 1 2011 Maxmind GeoLite Country database.
9375 - Create the /var/run/tor directory on startup on OpenSUSE if it is
9376 not already created. Patch from Andreas Stieger. Fixes bug 2573.
9378 o Documentation changes:
9379 - Modernize the doxygen configuration file slightly. Fixes bug 2707.
9380 - Resolve all doxygen warnings except those for missing documentation.
9382 - Add doxygen documentation for more functions, fields, and types.
9385 Changes in version 0.2.2.23-alpha - 2011-03-08
9386 Tor 0.2.2.23-alpha lets relays record their bandwidth history so when
9387 they restart they don't lose their bandwidth capacity estimate. This
9388 release also fixes a diverse set of user-facing bugs, ranging from
9389 relays overrunning their rate limiting to clients falsely warning about
9390 clock skew to bridge descriptor leaks by our bridge directory authority.
9393 - Stop sending a CLOCK_SKEW controller status event whenever
9394 we fetch directory information from a relay that has a wrong clock.
9395 Instead, only inform the controller when it's a trusted authority
9396 that claims our clock is wrong. Bugfix on 0.1.2.6-alpha; fixes
9397 the rest of bug 1074.
9398 - Fix an assert in parsing router descriptors containing IPv6
9399 addresses. This one took down the directory authorities when
9400 somebody tried some experimental code. Bugfix on 0.2.1.3-alpha.
9401 - Make the bridge directory authority refuse to answer directory
9402 requests for "all" descriptors. It used to include bridge
9403 descriptors in its answer, which was a major information leak.
9404 Found by "piebeer". Bugfix on 0.2.0.3-alpha.
9405 - If relays set RelayBandwidthBurst but not RelayBandwidthRate,
9406 Tor would ignore their RelayBandwidthBurst setting,
9407 potentially using more bandwidth than expected. Bugfix on
9408 0.2.0.1-alpha. Reported by Paul Wouters. Fixes bug 2470.
9409 - Ignore and warn if the user mistakenly sets "PublishServerDescriptor
9410 hidserv" in her torrc. The 'hidserv' argument never controlled
9411 publication of hidden service descriptors. Bugfix on 0.2.0.1-alpha.
9414 - Relays now save observed peak bandwidth throughput rates to their
9415 state file (along with total usage, which was already saved)
9416 so that they can determine their correct estimated bandwidth on
9417 restart. Resolves bug 1863, where Tor relays would reset their
9418 estimated bandwidth to 0 after restarting.
9419 - Directory authorities now take changes in router IP address and
9420 ORPort into account when determining router stability. Previously,
9421 if a router changed its IP or ORPort, the authorities would not
9422 treat it as having any downtime for the purposes of stability
9423 calculation, whereas clients would experience downtime since the
9424 change could take a while to propagate to them. Resolves issue 1035.
9425 - Enable Address Space Layout Randomization (ASLR) and Data Execution
9426 Prevention (DEP) by default on Windows to make it harder for
9427 attackers to exploit vulnerabilities. Patch from John Brooks.
9429 o Minor bugfixes (on 0.2.1.x and earlier):
9430 - Fix a rare crash bug that could occur when a client was configured
9431 with a large number of bridges. Fixes bug 2629; bugfix on
9432 0.2.1.2-alpha. Bugfix by trac user "shitlei".
9433 - Avoid a double mark-for-free warning when failing to attach a
9434 transparent proxy connection. Bugfix on 0.1.2.1-alpha. Fixes
9436 - Correctly detect failure to allocate an OpenSSL BIO. Fixes bug 2378;
9437 found by "cypherpunks". This bug was introduced before the first
9438 Tor release, in svn commit r110.
9439 - Country codes aren't supported in EntryNodes until 0.2.3.x, so
9440 don't mention them in the manpage. Fixes bug 2450; issue
9441 spotted by keb and G-Lo.
9442 - Fix a bug in bandwidth history state parsing that could have been
9443 triggered if a future version of Tor ever changed the timing
9444 granularity at which bandwidth history is measured. Bugfix on
9446 - When a relay decides that its DNS is too broken for it to serve
9447 as an exit server, it advertised itself as a non-exit, but
9448 continued to act as an exit. This could create accidental
9449 partitioning opportunities for users. Instead, if a relay is
9450 going to advertise reject *:* as its exit policy, it should
9451 really act with exit policy "reject *:*". Fixes bug 2366.
9452 Bugfix on Tor 0.1.2.5-alpha. Bugfix by user "postman" on trac.
9453 - In the special case where you configure a public exit relay as your
9454 bridge, Tor would be willing to use that exit relay as the last
9455 hop in your circuit as well. Now we fail that circuit instead.
9456 Bugfix on 0.2.0.12-alpha. Fixes bug 2403. Reported by "piebeer".
9457 - Fix a bug with our locking implementation on Windows that couldn't
9458 correctly detect when a file was already locked. Fixes bug 2504,
9459 bugfix on 0.2.1.6-alpha.
9460 - Fix IPv6-related connect() failures on some platforms (BSD, OS X).
9461 Bugfix on 0.2.0.3-alpha; fixes first part of bug 2660. Patch by
9463 - Set target port in get_interface_address6() correctly. Bugfix
9464 on 0.1.1.4-alpha and 0.2.0.3-alpha; fixes second part of bug 2660.
9465 - Directory authorities are now more robust to hops back in time
9466 when calculating router stability. Previously, if a run of uptime
9467 or downtime appeared to be negative, the calculation could give
9468 incorrect results. Bugfix on 0.2.0.6-alpha; noticed when fixing
9470 - Fix an assert that got triggered when using the TestingTorNetwork
9471 configuration option and then issuing a GETINFO config-text control
9472 command. Fixes bug 2250; bugfix on 0.2.1.2-alpha.
9474 o Minor bugfixes (on 0.2.2.x):
9475 - Clients should not weight BadExit nodes as Exits in their node
9476 selection. Similarly, directory authorities should not count BadExit
9477 bandwidth as Exit bandwidth when computing bandwidth-weights.
9478 Bugfix on 0.2.2.10-alpha; fixes bug 2203.
9479 - Correctly clear our dir_read/dir_write history when there is an
9480 error parsing any bw history value from the state file. Bugfix on
9482 - Resolve a bug in verifying signatures of directory objects
9483 with digests longer than SHA1. Bugfix on 0.2.2.20-alpha.
9484 Fixes bug 2409. Found by "piebeer".
9485 - Bridge authorities no longer crash on SIGHUP when they try to
9486 publish their relay descriptor to themselves. Fixes bug 2572. Bugfix
9490 - Log less aggressively about circuit timeout changes, and improve
9491 some other circuit timeout messages. Resolves bug 2004.
9492 - Log a little more clearly about the times at which we're no longer
9493 accepting new connections. Resolves bug 2181.
9494 - Reject attempts at the client side to open connections to private
9495 IP addresses (like 127.0.0.1, 10.0.0.1, and so on) with
9496 a randomly chosen exit node. Attempts to do so are always
9497 ill-defined, generally prevented by exit policies, and usually
9498 in error. This will also help to detect loops in transparent
9499 proxy configurations. You can disable this feature by setting
9500 "ClientRejectInternalAddresses 0" in your torrc.
9501 - Always treat failure to allocate an RSA key as an unrecoverable
9503 - Update to the March 1 2011 Maxmind GeoLite Country database.
9505 o Minor features (log subsystem):
9506 - Add documentation for configuring logging at different severities in
9507 different log domains. We've had this feature since 0.2.1.1-alpha,
9508 but for some reason it never made it into the manpage. Fixes
9510 - Make it simpler to specify "All log domains except for A and B".
9511 Previously you needed to say "[*,~A,~B]". Now you can just say
9513 - Add a "LogMessageDomains 1" option to include the domains of log
9514 messages along with the messages. Without this, there's no way
9515 to use log domains without reading the source or doing a lot
9518 o Packaging changes:
9519 - Stop shipping the Tor specs files and development proposal documents
9520 in the tarball. They are now in a separate git repository at
9521 git://git.torproject.org/torspec.git
9524 Changes in version 0.2.1.30 - 2011-02-23
9525 Tor 0.2.1.30 fixes a variety of less critical bugs. The main other
9526 change is a slight tweak to Tor's TLS handshake that makes relays
9527 and bridges that run this new version reachable from Iran again.
9528 We don't expect this tweak will win the arms race long-term, but it
9529 buys us time until we roll out a better solution.
9532 - Stop sending a CLOCK_SKEW controller status event whenever
9533 we fetch directory information from a relay that has a wrong clock.
9534 Instead, only inform the controller when it's a trusted authority
9535 that claims our clock is wrong. Bugfix on 0.1.2.6-alpha; fixes
9536 the rest of bug 1074.
9537 - Fix a bounds-checking error that could allow an attacker to
9538 remotely crash a directory authority. Bugfix on 0.2.1.5-alpha.
9540 - If relays set RelayBandwidthBurst but not RelayBandwidthRate,
9541 Tor would ignore their RelayBandwidthBurst setting,
9542 potentially using more bandwidth than expected. Bugfix on
9543 0.2.0.1-alpha. Reported by Paul Wouters. Fixes bug 2470.
9544 - Ignore and warn if the user mistakenly sets "PublishServerDescriptor
9545 hidserv" in her torrc. The 'hidserv' argument never controlled
9546 publication of hidden service descriptors. Bugfix on 0.2.0.1-alpha.
9549 - Adjust our TLS Diffie-Hellman parameters to match those used by
9551 - Update to the February 1 2011 Maxmind GeoLite Country database.
9554 - Check for and reject overly long directory certificates and
9555 directory tokens before they have a chance to hit any assertions.
9556 Bugfix on 0.2.1.28. Found by "doorss".
9557 - Bring the logic that gathers routerinfos and assesses the
9558 acceptability of circuits into line. This prevents a Tor OP from
9559 getting locked in a cycle of choosing its local OR as an exit for a
9560 path (due to a .exit request) and then rejecting the circuit because
9561 its OR is not listed yet. It also prevents Tor clients from using an
9562 OR running in the same instance as an exit (due to a .exit request)
9563 if the OR does not meet the same requirements expected of an OR
9564 running elsewhere. Fixes bug 1859; bugfix on 0.1.0.1-rc.
9566 o Packaging changes:
9567 - Stop shipping the Tor specs files and development proposal documents
9568 in the tarball. They are now in a separate git repository at
9569 git://git.torproject.org/torspec.git
9570 - Do not include Git version tags as though they are SVN tags when
9571 generating a tarball from inside a repository that has switched
9572 between branches. Bugfix on 0.2.1.15-rc; fixes bug 2402.
9575 Changes in version 0.2.2.22-alpha - 2011-01-25
9576 Tor 0.2.2.22-alpha fixes a few more less-critical security issues. The
9577 main other change is a slight tweak to Tor's TLS handshake that makes
9578 relays and bridges that run this new version reachable from Iran again.
9579 We don't expect this tweak will win the arms race long-term, but it
9580 will buy us a bit more time until we roll out a better solution.
9583 - Fix a bounds-checking error that could allow an attacker to
9584 remotely crash a directory authority. Bugfix on 0.2.1.5-alpha.
9586 - Don't assert when changing from bridge to relay or vice versa
9587 via the controller. The assert happened because we didn't properly
9588 initialize our keys in this case. Bugfix on 0.2.2.18-alpha; fixes
9589 bug 2433. Reported by bastik.
9592 - Adjust our TLS Diffie-Hellman parameters to match those used by
9594 - Provide a log message stating which geoip file we're parsing
9595 instead of just stating that we're parsing the geoip file.
9596 Implements ticket 2432.
9599 - Check for and reject overly long directory certificates and
9600 directory tokens before they have a chance to hit any assertions.
9601 Bugfix on 0.2.1.28 / 0.2.2.20-alpha. Found by "doorss".
9604 Changes in version 0.2.2.21-alpha - 2011-01-15
9605 Tor 0.2.2.21-alpha includes all the patches from Tor 0.2.1.29, which
9606 continues our recent code security audit work. The main fix resolves
9607 a remote heap overflow vulnerability that can allow remote code
9608 execution (CVE-2011-0427). Other fixes address a variety of assert
9609 and crash bugs, most of which we think are hard to exploit remotely.
9611 o Major bugfixes (security), also included in 0.2.1.29:
9612 - Fix a heap overflow bug where an adversary could cause heap
9613 corruption. This bug probably allows remote code execution
9614 attacks. Reported by "debuger". Fixes CVE-2011-0427. Bugfix on
9616 - Prevent a denial-of-service attack by disallowing any
9617 zlib-compressed data whose compression factor is implausibly
9618 high. Fixes part of bug 2324; reported by "doorss".
9619 - Zero out a few more keys in memory before freeing them. Fixes
9620 bug 2384 and part of bug 2385. These key instances found by
9621 "cypherpunks", based on Andrew Case's report about being able
9622 to find sensitive data in Tor's memory space if you have enough
9623 permissions. Bugfix on 0.0.2pre9.
9625 o Major bugfixes (crashes), also included in 0.2.1.29:
9626 - Prevent calls to Libevent from inside Libevent log handlers.
9627 This had potential to cause a nasty set of crashes, especially
9628 if running Libevent with debug logging enabled, and running
9629 Tor with a controller watching for low-severity log messages.
9630 Bugfix on 0.1.0.2-rc. Fixes bug 2190.
9631 - Add a check for SIZE_T_MAX to tor_realloc() to try to avoid
9632 underflow errors there too. Fixes the other part of bug 2324.
9633 - Fix a bug where we would assert if we ever had a
9634 cached-descriptors.new file (or another file read directly into
9635 memory) of exactly SIZE_T_CEILING bytes. Fixes bug 2326; bugfix
9636 on 0.2.1.25. Found by doorss.
9637 - Fix some potential asserts and parsing issues with grossly
9638 malformed router caches. Fixes bug 2352; bugfix on Tor 0.2.1.27.
9641 o Minor bugfixes (other), also included in 0.2.1.29:
9642 - Fix a bug with handling misformed replies to reverse DNS lookup
9643 requests in DNSPort. Bugfix on Tor 0.2.0.1-alpha. Related to a
9644 bug reported by doorss.
9645 - Fix compilation on mingw when a pthreads compatibility library
9646 has been installed. (We don't want to use it, so we shouldn't
9647 be including pthread.h.) Fixes bug 2313; bugfix on 0.1.0.1-rc.
9648 - Fix a bug where we would declare that we had run out of virtual
9649 addresses when the address space was only half-exhausted. Bugfix
9651 - Correctly handle the case where AutomapHostsOnResolve is set but
9652 no virtual addresses are available. Fixes bug 2328; bugfix on
9653 0.1.2.1-alpha. Bug found by doorss.
9654 - Correctly handle wrapping around when we run out of virtual
9655 address space. Found by cypherpunks; bugfix on 0.2.0.5-alpha.
9657 o Minor features, also included in 0.2.1.29:
9658 - Update to the January 1 2011 Maxmind GeoLite Country database.
9659 - Introduce output size checks on all of our decryption functions.
9661 o Build changes, also included in 0.2.1.29:
9662 - Tor does not build packages correctly with Automake 1.6 and earlier;
9663 added a check to Makefile.am to make sure that we're building with
9664 Automake 1.7 or later.
9665 - The 0.2.1.28 tarball was missing src/common/OpenBSD_malloc_Linux.c
9666 because we built it with a too-old version of automake. Thus that
9667 release broke ./configure --enable-openbsd-malloc, which is popular
9668 among really fast exit relays on Linux.
9670 o Major bugfixes, new in 0.2.2.21-alpha:
9671 - Prevent crash/heap corruption when the cbtnummodes consensus
9672 parameter is set to 0 or large values. Fixes bug 2317; bugfix
9675 o Major features, new in 0.2.2.21-alpha:
9676 - Introduce minimum/maximum values that clients will believe
9677 from the consensus. Now we'll have a better chance to avoid crashes
9678 or worse when a consensus param has a weird value.
9680 o Minor features, new in 0.2.2.21-alpha:
9681 - Make sure to disable DirPort if running as a bridge. DirPorts aren't
9682 used on bridges, and it makes bridge scanning somewhat easier.
9683 - If writing the state file to disk fails, wait up to an hour before
9684 retrying again, rather than trying again each second. Fixes bug
9685 2346; bugfix on Tor 0.1.1.3-alpha.
9686 - Make Libevent log messages get delivered to controllers later,
9687 and not from inside the Libevent log handler. This prevents unsafe
9688 reentrant Libevent calls while still letting the log messages
9690 - Detect platforms that brokenly use a signed size_t, and refuse to
9691 build there. Found and analyzed by doorss and rransom.
9692 - Fix a bunch of compile warnings revealed by mingw with gcc 4.5.
9695 o Minor bugfixes, new in 0.2.2.21-alpha:
9696 - Handle SOCKS messages longer than 128 bytes long correctly, rather
9697 than waiting forever for them to finish. Fixes bug 2330; bugfix
9698 on 0.2.0.16-alpha. Found by doorss.
9699 - Add assertions to check for overflow in arguments to
9700 base32_encode() and base32_decode(); fix a signed-unsigned
9701 comparison there too. These bugs are not actually reachable in Tor,
9702 but it's good to prevent future errors too. Found by doorss.
9703 - Correctly detect failures to create DNS requests when using Libevent
9704 versions before v2. (Before Libevent 2, we used our own evdns
9705 implementation. Its return values for Libevent's evdns_resolve_*()
9706 functions are not consistent with those from Libevent.) Fixes bug
9707 2363; bugfix on 0.2.2.6-alpha. Found by "lodger".
9709 o Documentation, new in 0.2.2.21-alpha:
9710 - Document the default socks host and port (127.0.0.1:9050) for
9714 Changes in version 0.2.1.29 - 2011-01-15
9715 Tor 0.2.1.29 continues our recent code security audit work. The main
9716 fix resolves a remote heap overflow vulnerability that can allow remote
9717 code execution. Other fixes address a variety of assert and crash bugs,
9718 most of which we think are hard to exploit remotely.
9720 o Major bugfixes (security):
9721 - Fix a heap overflow bug where an adversary could cause heap
9722 corruption. This bug probably allows remote code execution
9723 attacks. Reported by "debuger". Fixes CVE-2011-0427. Bugfix on
9725 - Prevent a denial-of-service attack by disallowing any
9726 zlib-compressed data whose compression factor is implausibly
9727 high. Fixes part of bug 2324; reported by "doorss".
9728 - Zero out a few more keys in memory before freeing them. Fixes
9729 bug 2384 and part of bug 2385. These key instances found by
9730 "cypherpunks", based on Andrew Case's report about being able
9731 to find sensitive data in Tor's memory space if you have enough
9732 permissions. Bugfix on 0.0.2pre9.
9734 o Major bugfixes (crashes):
9735 - Prevent calls to Libevent from inside Libevent log handlers.
9736 This had potential to cause a nasty set of crashes, especially
9737 if running Libevent with debug logging enabled, and running
9738 Tor with a controller watching for low-severity log messages.
9739 Bugfix on 0.1.0.2-rc. Fixes bug 2190.
9740 - Add a check for SIZE_T_MAX to tor_realloc() to try to avoid
9741 underflow errors there too. Fixes the other part of bug 2324.
9742 - Fix a bug where we would assert if we ever had a
9743 cached-descriptors.new file (or another file read directly into
9744 memory) of exactly SIZE_T_CEILING bytes. Fixes bug 2326; bugfix
9745 on 0.2.1.25. Found by doorss.
9746 - Fix some potential asserts and parsing issues with grossly
9747 malformed router caches. Fixes bug 2352; bugfix on Tor 0.2.1.27.
9750 o Minor bugfixes (other):
9751 - Fix a bug with handling misformed replies to reverse DNS lookup
9752 requests in DNSPort. Bugfix on Tor 0.2.0.1-alpha. Related to a
9753 bug reported by doorss.
9754 - Fix compilation on mingw when a pthreads compatibility library
9755 has been installed. (We don't want to use it, so we shouldn't
9756 be including pthread.h.) Fixes bug 2313; bugfix on 0.1.0.1-rc.
9757 - Fix a bug where we would declare that we had run out of virtual
9758 addresses when the address space was only half-exhausted. Bugfix
9760 - Correctly handle the case where AutomapHostsOnResolve is set but
9761 no virtual addresses are available. Fixes bug 2328; bugfix on
9762 0.1.2.1-alpha. Bug found by doorss.
9763 - Correctly handle wrapping around to when we run out of virtual
9764 address space. Found by cypherpunks, bugfix on 0.2.0.5-alpha.
9765 - The 0.2.1.28 tarball was missing src/common/OpenBSD_malloc_Linux.c
9766 because we built it with a too-old version of automake. Thus that
9767 release broke ./configure --enable-openbsd-malloc, which is popular
9768 among really fast exit relays on Linux.
9771 - Update to the January 1 2011 Maxmind GeoLite Country database.
9772 - Introduce output size checks on all of our decryption functions.
9775 - Tor does not build packages correctly with Automake 1.6 and earlier;
9776 added a check to Makefile.am to make sure that we're building with
9777 Automake 1.7 or later.
9780 Changes in version 0.2.2.20-alpha - 2010-12-17
9781 Tor 0.2.2.20-alpha does some code cleanup to reduce the risk of remotely
9782 exploitable bugs. We also fix a variety of other significant bugs,
9783 change the IP address for one of our directory authorities, and update
9784 the minimum version that Tor relays must run to join the network.
9787 - Fix a remotely exploitable bug that could be used to crash instances
9788 of Tor remotely by overflowing on the heap. Remote-code execution
9789 hasn't been confirmed, but can't be ruled out. Everyone should
9790 upgrade. Bugfix on the 0.1.1 series and later.
9791 - Fix a bug that could break accounting on 64-bit systems with large
9792 time_t values, making them hibernate for impossibly long intervals.
9793 Fixes bug 2146. Bugfix on 0.0.9pre6; fix by boboper.
9794 - Fix a logic error in directory_fetches_from_authorities() that
9795 would cause all _non_-exits refusing single-hop-like circuits
9796 to fetch from authorities, when we wanted to have _exits_ fetch
9797 from authorities. Fixes more of 2097. Bugfix on 0.2.2.16-alpha;
9799 - Fix a stream fairness bug that would cause newer streams on a given
9800 circuit to get preference when reading bytes from the origin or
9801 destination. Fixes bug 2210. Fix by Mashael AlSabah. This bug was
9802 introduced before the first Tor release, in svn revision r152.
9804 o Directory authority changes:
9805 - Change IP address and ports for gabelmoo (v3 directory authority).
9808 - Avoid crashes when AccountingMax is set on clients. Fixes bug 2235.
9809 Bugfix on 0.2.2.18-alpha. Diagnosed by boboper.
9810 - Fix an off-by-one error in calculating some controller command
9811 argument lengths. Fortunately, this mistake is harmless since
9812 the controller code does redundant NUL termination too. Found by
9813 boboper. Bugfix on 0.1.1.1-alpha.
9814 - Do not dereference NULL if a bridge fails to build its
9815 extra-info descriptor. Found by an anonymous commenter on
9816 Trac. Bugfix on 0.2.2.19-alpha.
9819 - Update to the December 1 2010 Maxmind GeoLite Country database.
9820 - Directory authorities now reject relays running any versions of
9821 Tor between 0.2.1.3-alpha and 0.2.1.18 inclusive; they have
9822 known bugs that keep RELAY_EARLY cells from working on rendezvous
9823 circuits. Followup to fix for bug 2081.
9824 - Directory authorities now reject relays running any version of Tor
9825 older than 0.2.0.26-rc. That version is the earliest that fetches
9826 current directory information correctly. Fixes bug 2156.
9827 - Report only the top 10 ports in exit-port stats in order not to
9828 exceed the maximum extra-info descriptor length of 50 KB. Implements
9832 Changes in version 0.2.1.28 - 2010-12-17
9833 Tor 0.2.1.28 does some code cleanup to reduce the risk of remotely
9834 exploitable bugs. We also took this opportunity to change the IP address
9835 for one of our directory authorities, and to update the geoip database
9839 - Fix a remotely exploitable bug that could be used to crash instances
9840 of Tor remotely by overflowing on the heap. Remote-code execution
9841 hasn't been confirmed, but can't be ruled out. Everyone should
9842 upgrade. Bugfix on the 0.1.1 series and later.
9844 o Directory authority changes:
9845 - Change IP address and ports for gabelmoo (v3 directory authority).
9848 - Update to the December 1 2010 Maxmind GeoLite Country database.
9851 Changes in version 0.2.1.27 - 2010-11-23
9852 Yet another OpenSSL security patch broke its compatibility with Tor:
9853 Tor 0.2.1.27 makes relays work with openssl 0.9.8p and 1.0.0.b. We
9854 also took this opportunity to fix several crash bugs, integrate a new
9855 directory authority, and update the bundled GeoIP database.
9858 - Resolve an incompatibility with OpenSSL 0.9.8p and OpenSSL 1.0.0b:
9859 No longer set the tlsext_host_name extension on server SSL objects;
9860 but continue to set it on client SSL objects. Our goal in setting
9861 it was to imitate a browser, not a vhosting server. Fixes bug 2204;
9862 bugfix on 0.2.1.1-alpha.
9863 - Do not log messages to the controller while shrinking buffer
9864 freelists. Doing so would sometimes make the controller connection
9865 try to allocate a buffer chunk, which would mess up the internals
9866 of the freelist and cause an assertion failure. Fixes bug 1125;
9867 fixed by Robert Ransom. Bugfix on 0.2.0.16-alpha.
9868 - Learn our external IP address when we're a relay or bridge, even if
9869 we set PublishServerDescriptor to 0. Bugfix on 0.2.0.3-alpha,
9870 where we introduced bridge relays that don't need to publish to
9871 be useful. Fixes bug 2050.
9872 - Do even more to reject (and not just ignore) annotations on
9873 router descriptors received anywhere but from the cache. Previously
9874 we would ignore such annotations at first, but cache them to disk
9875 anyway. Bugfix on 0.2.0.8-alpha. Found by piebeer.
9876 - When you're using bridges and your network goes away and your
9877 bridges get marked as down, recover when you attempt a new socks
9878 connection (if the network is back), rather than waiting up to an
9879 hour to try fetching new descriptors for your bridges. Bugfix on
9880 0.2.0.3-alpha; fixes bug 1981.
9883 - Move to the November 2010 Maxmind GeoLite country db (rather
9884 than the June 2009 ip-to-country GeoIP db) for our statistics that
9885 count how many users relays are seeing from each country. Now we'll
9886 have more accurate data, especially for many African countries.
9888 o New directory authorities:
9889 - Set up maatuska (run by Linus Nordberg) as the eighth v3 directory
9893 - Fix an assertion failure that could occur in directory caches or
9894 bridge users when using a very short voting interval on a testing
9895 network. Diagnosed by Robert Hogan. Fixes bug 1141; bugfix on
9897 - Enforce multiplicity rules when parsing annotations. Bugfix on
9898 0.2.0.8-alpha. Found by piebeer.
9899 - Allow handshaking OR connections to take a full KeepalivePeriod
9900 seconds to handshake. Previously, we would close them after
9901 IDLE_OR_CONN_TIMEOUT (180) seconds, the same timeout as if they
9902 were open. Bugfix on 0.2.1.26; fixes bug 1840. Thanks to mingw-san
9904 - When building with --enable-gcc-warnings on OpenBSD, disable
9905 warnings in system headers. This makes --enable-gcc-warnings
9906 pass on OpenBSD 4.8.
9909 - Exit nodes didn't recognize EHOSTUNREACH as a plausible error code,
9910 and so sent back END_STREAM_REASON_MISC. Clients now recognize a new
9911 stream ending reason for this case: END_STREAM_REASON_NOROUTE.
9912 Servers can start sending this code when enough clients recognize
9913 it. Bugfix on 0.1.0.1-rc; fixes part of bug 1793.
9914 - Build correctly on mingw with more recent versions of OpenSSL 0.9.8.
9915 Patch from mingw-san.
9918 - Remove the old debian/ directory from the main Tor distribution.
9919 The official Tor-for-debian git repository lives at the URL
9920 https://git.torproject.org/debian/tor.git
9921 - Stop shipping the old doc/website/ directory in the tarball. We
9922 changed the website format in late 2010, and what we shipped in
9923 0.2.1.26 really wasn't that useful anyway.
9926 Changes in version 0.2.2.19-alpha - 2010-11-22
9927 Yet another OpenSSL security patch broke its compatibility with Tor:
9928 Tor 0.2.2.19-alpha makes relays work with OpenSSL 0.9.8p and 1.0.0.b.
9931 - Resolve an incompatibility with OpenSSL 0.9.8p and OpenSSL 1.0.0b:
9932 No longer set the tlsext_host_name extension on server SSL objects;
9933 but continue to set it on client SSL objects. Our goal in setting
9934 it was to imitate a browser, not a vhosting server. Fixes bug 2204;
9935 bugfix on 0.2.1.1-alpha.
9938 - Try harder not to exceed the maximum length of 50 KB when writing
9939 statistics to extra-info descriptors. This bug was triggered by very
9940 fast relays reporting exit-port, entry, and dirreq statistics.
9941 Reported by Olaf Selke. Bugfix on 0.2.2.1-alpha. Fixes bug 2183.
9942 - Publish a router descriptor even if generating an extra-info
9943 descriptor fails. Previously we would not publish a router
9944 descriptor without an extra-info descriptor; this can cause fast
9945 exit relays collecting exit-port statistics to drop from the
9946 consensus. Bugfix on 0.1.2.9-rc; fixes bug 2195.
9949 Changes in version 0.2.2.18-alpha - 2010-11-16
9950 Tor 0.2.2.18-alpha fixes several crash bugs that have been nagging
9951 us lately, makes unpublished bridge relays able to detect their IP
9952 address, and fixes a wide variety of other bugs to get us much closer
9953 to a stable release.
9956 - Do even more to reject (and not just ignore) annotations on
9957 router descriptors received anywhere but from the cache. Previously
9958 we would ignore such annotations at first, but cache them to disk
9959 anyway. Bugfix on 0.2.0.8-alpha. Found by piebeer.
9960 - Do not log messages to the controller while shrinking buffer
9961 freelists. Doing so would sometimes make the controller connection
9962 try to allocate a buffer chunk, which would mess up the internals
9963 of the freelist and cause an assertion failure. Fixes bug 1125;
9964 fixed by Robert Ransom. Bugfix on 0.2.0.16-alpha.
9965 - Learn our external IP address when we're a relay or bridge, even if
9966 we set PublishServerDescriptor to 0. Bugfix on 0.2.0.3-alpha,
9967 where we introduced bridge relays that don't need to publish to
9968 be useful. Fixes bug 2050.
9969 - Maintain separate TLS contexts and certificates for incoming and
9970 outgoing connections in bridge relays. Previously we would use the
9971 same TLS contexts and certs for incoming and outgoing connections.
9972 Bugfix on 0.2.0.3-alpha; addresses bug 988.
9973 - Maintain separate identity keys for incoming and outgoing TLS
9974 contexts in bridge relays. Previously we would use the same
9975 identity keys for incoming and outgoing TLS contexts. Bugfix on
9976 0.2.0.3-alpha; addresses the other half of bug 988.
9977 - Avoid an assertion failure when we as an authority receive a
9978 duplicate upload of a router descriptor that we already have,
9979 but which we previously considered an obsolete descriptor.
9980 Fixes another case of bug 1776. Bugfix on 0.2.2.16-alpha.
9981 - Avoid a crash bug triggered by looking at a dangling pointer while
9982 setting the network status consensus. Found by Robert Ransom.
9983 Bugfix on 0.2.2.17-alpha. Fixes bug 2097.
9984 - Fix a logic error where servers that _didn't_ act as exits would
9985 try to keep their server lists more aggressively up to date than
9986 exits, when it was supposed to be the other way around. Bugfix
9989 o Minor bugfixes (on Tor 0.2.1.x and earlier):
9990 - When we're trying to guess whether we know our IP address as
9991 a relay, we would log various ways that we failed to guess
9992 our address, but never log that we ended up guessing it
9993 successfully. Now add a log line to help confused and anxious
9994 relay operators. Bugfix on 0.1.2.1-alpha; fixes bug 1534.
9995 - Bring the logic that gathers routerinfos and assesses the
9996 acceptability of circuits into line. This prevents a Tor OP from
9997 getting locked in a cycle of choosing its local OR as an exit for a
9998 path (due to a .exit request) and then rejecting the circuit because
9999 its OR is not listed yet. It also prevents Tor clients from using an
10000 OR running in the same instance as an exit (due to a .exit request)
10001 if the OR does not meet the same requirements expected of an OR
10002 running elsewhere. Fixes bug 1859; bugfix on 0.1.0.1-rc.
10003 - Correctly describe errors that occur when generating a TLS object.
10004 Previously we would attribute them to a failure while generating a
10005 TLS context. Patch by Robert Ransom. Bugfix on 0.1.0.4-rc; fixes
10007 - Enforce multiplicity rules when parsing annotations. Bugfix on
10008 0.2.0.8-alpha. Found by piebeer.
10009 - Fix warnings that newer versions of autoconf produced during
10010 ./autogen.sh. These warnings appear to be harmless in our case,
10011 but they were extremely verbose. Fixes bug 2020.
10013 o Minor bugfixes (on Tor 0.2.2.x):
10014 - Enable protection of small arrays whenever we build with gcc
10015 hardening features, not only when also building with warnings
10016 enabled. Fixes bug 2031; bugfix on 0.2.2.14-alpha. Reported by keb.
10019 - Make hidden services work better in private Tor networks by not
10020 requiring any uptime to join the hidden service descriptor
10021 DHT. Implements ticket 2088.
10022 - Rate-limit the "your application is giving Tor only an IP address"
10023 warning. Addresses bug 2000; bugfix on 0.0.8pre2.
10024 - When AllowSingleHopExits is set, print a warning to explain to the
10025 relay operator why most clients are avoiding her relay.
10026 - Update to the November 1 2010 Maxmind GeoLite Country database.
10028 o Code simplifications and refactoring:
10029 - When we fixed bug 1038 we had to put in a restriction not to send
10030 RELAY_EARLY cells on rend circuits. This was necessary as long
10031 as relays using Tor 0.2.1.3-alpha through 0.2.1.18-alpha were
10032 active. Now remove this obsolete check. Resolves bug 2081.
10033 - Some options used different conventions for uppercasing of acronyms
10034 when comparing manpage and source. Fix those in favor of the
10035 manpage, as it makes sense to capitalize acronyms.
10036 - Remove the torrc.complete file. It hasn't been kept up to date
10037 and users will have better luck checking out the manpage.
10038 - Remove the obsolete "NoPublish" option; it has been flagged
10039 as obsolete and has produced a warning since 0.1.1.18-rc.
10040 - Remove everything related to building the expert bundle for OS X.
10041 It has confused many users, doesn't work right on OS X 10.6,
10042 and is hard to get rid of once installed. Resolves bug 1274.
10045 Changes in version 0.2.2.17-alpha - 2010-09-30
10046 Tor 0.2.2.17-alpha introduces a feature to make it harder for clients
10047 to use one-hop circuits (which can put the exit relays at higher risk,
10048 plus unbalance the network); fixes a big bug in bandwidth accounting
10049 for relays that want to limit their monthly bandwidth use; fixes a
10050 big pile of bugs in how clients tolerate temporary network failure;
10051 and makes our adaptive circuit build timeout feature (which improves
10052 client performance if your network is fast while not breaking things
10053 if your network is slow) better handle bad networks.
10056 - Exit relays now try harder to block exit attempts from unknown
10057 relays, to make it harder for people to use them as one-hop proxies
10058 a la tortunnel. Controlled by the refuseunknownexits consensus
10059 parameter (currently enabled), or you can override it on your
10060 relay with the RefuseUnknownExits torrc option. Resolves bug 1751.
10062 o Major bugfixes (0.2.1.x and earlier):
10063 - Fix a bug in bandwidth accounting that could make us use twice
10064 the intended bandwidth when our interval start changes due to
10065 daylight saving time. Now we tolerate skew in stored vs computed
10066 interval starts: if the start of the period changes by no more than
10067 50% of the period's duration, we remember bytes that we transferred
10068 in the old period. Fixes bug 1511; bugfix on 0.0.9pre5.
10069 - Always search the Windows system directory for system DLLs, and
10070 nowhere else. Bugfix on 0.1.1.23; fixes bug 1954.
10071 - When you're using bridges and your network goes away and your
10072 bridges get marked as down, recover when you attempt a new socks
10073 connection (if the network is back), rather than waiting up to an
10074 hour to try fetching new descriptors for your bridges. Bugfix on
10075 0.2.0.3-alpha; fixes bug 1981.
10077 o Major bugfixes (on 0.2.2.x):
10078 - Fix compilation on Windows. Bugfix on 0.2.2.16-alpha; related to
10080 - Fix a segfault that could happen when operating a bridge relay with
10081 no GeoIP database set. Fixes bug 1964; bugfix on 0.2.2.15-alpha.
10082 - The consensus bandwidth-weights (used by clients to choose fast
10083 relays) entered an unexpected edge case in September where
10084 Exits were much scarcer than Guards, resulting in bad weight
10085 recommendations. Now we compute them using new constraints that
10086 should succeed in all cases. Also alter directory authorities to
10087 not include the bandwidth-weights line if they fail to produce
10088 valid values. Fixes bug 1952; bugfix on 0.2.2.10-alpha.
10089 - When weighting bridges during path selection, we used to trust
10090 the bandwidths they provided in their descriptor, only capping them
10091 at 10MB/s. This turned out to be problematic for two reasons:
10092 Bridges could claim to handle a lot more traffic then they
10093 actually would, thus making more clients pick them and have a
10094 pretty effective DoS attack. The other issue is that new bridges
10095 that might not have a good estimate for their bw capacity yet
10096 would not get used at all unless no other bridges are available
10097 to a client. Fixes bug 1912; bugfix on 0.2.2.7-alpha.
10099 o Major bugfixes (on the circuit build timeout feature, 0.2.2.x):
10100 - Ignore cannibalized circuits when recording circuit build times.
10101 This should provide for a minor performance improvement for hidden
10102 service users using 0.2.2.14-alpha, and should remove two spurious
10103 notice log messages. Bugfix on 0.2.2.14-alpha; fixes bug 1740.
10104 - Simplify the logic that causes us to decide if the network is
10105 unavailable for purposes of recording circuit build times. If we
10106 receive no cells whatsoever for the entire duration of a circuit's
10107 full measured lifetime, the network is probably down. Also ignore
10108 one-hop directory fetching circuit timeouts when calculating our
10109 circuit build times. These changes should hopefully reduce the
10110 cases where we see ridiculous circuit build timeouts for people
10111 with spotty wireless connections. Fixes part of bug 1772; bugfix
10113 - Prevent the circuit build timeout from becoming larger than
10114 the maximum build time we have ever seen. Also, prevent the time
10115 period for measurement circuits from becoming larger than twice that
10116 value. Fixes the other part of bug 1772; bugfix on 0.2.2.2-alpha.
10119 - When we run out of directory information such that we can't build
10120 circuits, but then get enough that we can build circuits, log when
10121 we actually construct a circuit, so the user has a better chance of
10122 knowing what's going on. Fixes bug 1362.
10123 - Be more generous with how much bandwidth we'd use up (with
10124 accounting enabled) before entering "soft hibernation". Previously,
10125 we'd refuse new connections and circuits once we'd used up 95% of
10126 our allotment. Now, we use up 95% of our allotment, AND make sure
10127 that we have no more than 500MB (or 3 hours of expected traffic,
10128 whichever is lower) remaining before we enter soft hibernation.
10129 - If we've configured EntryNodes and our network goes away and/or all
10130 our entrynodes get marked down, optimistically retry them all when
10131 a new socks application request appears. Fixes bug 1882.
10132 - Add some more defensive programming for architectures that can't
10133 handle unaligned integer accesses. We don't know of any actual bugs
10134 right now, but that's the best time to fix them. Fixes bug 1943.
10135 - Support line continuations in the torrc config file. If a line
10136 ends with a single backslash character, the newline is ignored, and
10137 the configuration value is treated as continuing on the next line.
10140 o Minor bugfixes (on 0.2.1.x and earlier):
10141 - For bandwidth accounting, calculate our expected bandwidth rate
10142 based on the time during which we were active and not in
10143 soft-hibernation during the last interval. Previously, we were
10144 also considering the time spent in soft-hibernation. If this
10145 was a long time, we would wind up underestimating our bandwidth
10146 by a lot, and skewing our wakeup time towards the start of the
10147 accounting interval. Fixes bug 1789. Bugfix on 0.0.9pre5.
10149 o Minor bugfixes (on 0.2.2.x):
10150 - Resume generating CIRC FAILED REASON=TIMEOUT control port messages,
10151 which were disabled by the circuit build timeout changes in
10152 0.2.2.14-alpha. Bugfix on 0.2.2.14-alpha; fixes bug 1739.
10153 - Make sure we don't warn about missing bandwidth weights when
10154 choosing bridges or other relays not in the consensus. Bugfix on
10155 0.2.2.10-alpha; fixes bug 1805.
10156 - In our logs, do not double-report signatures from unrecognized
10157 authorities both as "from unknown authority" and "not
10158 present". Fixes bug 1956, bugfix on 0.2.2.16-alpha.
10161 Changes in version 0.2.2.16-alpha - 2010-09-17
10162 Tor 0.2.2.16-alpha fixes a variety of old stream fairness bugs (most
10163 evident at exit relays), and also continues to resolve all the little
10164 bugs that have been filling up trac lately.
10166 o Major bugfixes (stream-level fairness):
10167 - When receiving a circuit-level SENDME for a blocked circuit, try
10168 to package cells fairly from all the streams that had previously
10169 been blocked on that circuit. Previously, we had started with the
10170 oldest stream, and allowed each stream to potentially exhaust
10171 the circuit's package window. This gave older streams on any
10172 given circuit priority over newer ones. Fixes bug 1937. Detected
10173 originally by Camilo Viecco. This bug was introduced before the
10174 first Tor release, in svn commit r152: it is the new winner of
10175 the longest-lived bug prize.
10176 - When the exit relay got a circuit-level sendme cell, it started
10177 reading on the exit streams, even if had 500 cells queued in the
10178 circuit queue already, so the circuit queue just grew and grew in
10179 some cases. We fix this by not re-enabling reading on receipt of a
10180 sendme cell when the cell queue is blocked. Fixes bug 1653. Bugfix
10181 on 0.2.0.1-alpha. Detected by Mashael AlSabah. Original patch by
10183 - Newly created streams were allowed to read cells onto circuits,
10184 even if the circuit's cell queue was blocked and waiting to drain.
10185 This created potential unfairness, as older streams would be
10186 blocked, but newer streams would gladly fill the queue completely.
10187 We add code to detect this situation and prevent any stream from
10188 getting more than one free cell. Bugfix on 0.2.0.1-alpha. Partially
10192 - Update to the September 1 2010 Maxmind GeoLite Country database.
10193 - Warn when CookieAuthFileGroupReadable is set but CookieAuthFile is
10194 not. This would lead to a cookie that is still not group readable.
10195 Closes bug 1843. Suggested by katmagic.
10196 - When logging a rate-limited warning, we now mention how many messages
10197 got suppressed since the last warning.
10198 - Add new "perconnbwrate" and "perconnbwburst" consensus params to
10199 do individual connection-level rate limiting of clients. The torrc
10200 config options with the same names trump the consensus params, if
10201 both are present. Replaces the old "bwconnrate" and "bwconnburst"
10202 consensus params which were broken from 0.2.2.7-alpha through
10203 0.2.2.14-alpha. Closes bug 1947.
10204 - When a router changes IP address or port, authorities now launch
10205 a new reachability test for it. Implements ticket 1899.
10206 - Make the formerly ugly "2 unknown, 7 missing key, 0 good, 0 bad,
10207 2 no signature, 4 required" messages about consensus signatures
10208 easier to read, and make sure they get logged at the same severity
10209 as the messages explaining which keys are which. Fixes bug 1290.
10210 - Don't warn when we have a consensus that we can't verify because
10211 of missing certificates, unless those certificates are ones
10212 that we have been trying and failing to download. Fixes bug 1145.
10213 - If you configure your bridge with a known identity fingerprint,
10214 and the bridge authority is unreachable (as it is in at least
10215 one country now), fall back to directly requesting the descriptor
10216 from the bridge. Finishes the feature started in 0.2.0.10-alpha;
10218 - When building with --enable-gcc-warnings on OpenBSD, disable
10219 warnings in system headers. This makes --enable-gcc-warnings
10220 pass on OpenBSD 4.8.
10222 o Minor bugfixes (on 0.2.1.x and earlier):
10223 - Authorities will now attempt to download consensuses if their
10224 own efforts to make a live consensus have failed. This change
10225 means authorities that restart will fetch a valid consensus, and
10226 it means authorities that didn't agree with the current consensus
10227 will still fetch and serve it if it has enough signatures. Bugfix
10228 on 0.2.0.9-alpha; fixes bug 1300.
10229 - Ensure DNS requests launched by "RESOLVE" commands from the
10230 controller respect the __LeaveStreamsUnattached setconf options. The
10231 same goes for requests launched via DNSPort or transparent
10232 proxying. Bugfix on 0.2.0.1-alpha; fixes bug 1525.
10233 - Allow handshaking OR connections to take a full KeepalivePeriod
10234 seconds to handshake. Previously, we would close them after
10235 IDLE_OR_CONN_TIMEOUT (180) seconds, the same timeout as if they
10236 were open. Bugfix on 0.2.1.26; fixes bug 1840. Thanks to mingw-san
10238 - Rate-limit "Failed to hand off onionskin" warnings.
10239 - Never relay a cell for a circuit we have already destroyed.
10240 Between marking a circuit as closeable and finally closing it,
10241 it may have been possible for a few queued cells to get relayed,
10242 even though they would have been immediately dropped by the next
10243 OR in the circuit. Fixes bug 1184; bugfix on 0.2.0.1-alpha.
10244 - Never queue a cell for a circuit that's already been marked
10246 - Never vote for a server as "Running" if we have a descriptor for
10247 it claiming to be hibernating, and that descriptor was published
10248 more recently than our last contact with the server. Bugfix on
10249 0.2.0.3-alpha; fixes bug 911.
10250 - Squash a compile warning on OpenBSD. Reported by Tas; fixes
10253 o Minor bugfixes (on 0.2.2.x):
10254 - Fix a regression introduced in 0.2.2.7-alpha that marked relays
10255 down if a directory fetch fails and you've configured either
10256 bridges or EntryNodes. The intent was to mark the relay as down
10257 _unless_ you're using bridges or EntryNodes, since if you are
10258 then you could quickly run out of entry points.
10259 - Fix the Windows directory-listing code. A bug introduced in
10260 0.2.2.14-alpha could make Windows directory servers forget to load
10261 some of their cached v2 networkstatus files.
10262 - Really allow clients to use relays as bridges. Fixes bug 1776;
10263 bugfix on 0.2.2.15-alpha.
10264 - Demote a warn to info that happens when the CellStatistics option
10265 was just enabled. Bugfix on 0.2.2.15-alpha; fixes bug 1921.
10266 Reported by Moritz Bartl.
10267 - On Windows, build correctly either with or without Unicode support.
10268 This is necessary so that Tor can support fringe platforms like
10269 Windows 98 (which has no Unicode), or Windows CE (which has no
10270 non-Unicode). Bugfix on 0.2.2.14-alpha; fixes bug 1797.
10273 - Add a unit test for cross-platform directory-listing code.
10276 Changes in version 0.2.2.15-alpha - 2010-08-18
10277 Tor 0.2.2.15-alpha fixes a big bug in hidden service availability,
10278 fixes a variety of other bugs that were preventing performance
10279 experiments from moving forward, fixes several bothersome memory leaks,
10280 and generally closes a lot of smaller bugs that have been filling up
10284 - Stop assigning the HSDir flag to relays that disable their
10285 DirPort (and thus will refuse to answer directory requests). This
10286 fix should dramatically improve the reachability of hidden services:
10287 hidden services and hidden service clients pick six HSDir relays
10288 to store and retrieve the hidden service descriptor, and currently
10289 about half of the HSDir relays will refuse to work. Bugfix on
10290 0.2.0.10-alpha; fixes part of bug 1693.
10291 - The PerConnBWRate and Burst config options, along with the
10292 bwconnrate and bwconnburst consensus params, initialized each conn's
10293 token bucket values only when the connection is established. Now we
10294 update them if the config options change, and update them every time
10295 we get a new consensus. Otherwise we can encounter an ugly edge
10296 case where we initialize an OR conn to client-level bandwidth,
10297 but then later the relay joins the consensus and we leave it
10298 throttled. Bugfix on 0.2.2.7-alpha; fixes bug 1830.
10299 - Fix a regression that caused Tor to rebind its ports if it receives
10300 SIGHUP while hibernating. Bugfix in 0.1.1.6-alpha; closes bug 919.
10303 - Lower the maximum weighted-fractional-uptime cutoff to 98%. This
10304 should give us approximately 40-50% more Guard-flagged nodes,
10305 improving the anonymity the Tor network can provide and also
10306 decreasing the dropoff in throughput that relays experience when
10307 they first get the Guard flag.
10308 - Allow enabling or disabling the *Statistics config options while
10312 - Update to the August 1 2010 Maxmind GeoLite Country database.
10313 - Have the controller interface give a more useful message than
10314 "Internal Error" in response to failed GETINFO requests.
10315 - Warn when the same option is provided more than once in a torrc
10316 file, on the command line, or in a single SETCONF statement, and
10317 the option is one that only accepts a single line. Closes bug 1384.
10318 - Build correctly on mingw with more recent versions of OpenSSL 0.9.8.
10319 Patch from mingw-san.
10320 - Add support for the country code "{??}" in torrc options like
10321 ExcludeNodes, to indicate all routers of unknown country. Closes
10323 - Relays report the number of bytes spent on answering directory
10324 requests in extra-info descriptors similar to {read,write}-history.
10325 Implements enhancement 1790.
10327 o Minor bugfixes (on 0.2.1.x and earlier):
10328 - Complain if PublishServerDescriptor is given multiple arguments that
10329 include 0 or 1. This configuration will be rejected in the future.
10330 Bugfix on 0.2.0.1-alpha; closes bug 1107.
10331 - Disallow BridgeRelay 1 and ORPort 0 at once in the configuration.
10332 Bugfix on 0.2.0.13-alpha; closes bug 928.
10333 - Change "Application request when we're believed to be offline."
10334 notice to "Application request when we haven't used client
10335 functionality lately.", to clarify that it's not an error. Bugfix
10336 on 0.0.9.3; fixes bug 1222.
10337 - Fix a bug in the controller interface where "GETINFO ns/asdaskljkl"
10338 would return "551 Internal error" rather than "552 Unrecognized key
10339 ns/asdaskljkl". Bugfix on 0.1.2.3-alpha.
10340 - Users can't configure a regular relay to be their bridge. It didn't
10341 work because when Tor fetched the bridge descriptor, it found
10342 that it already had it, and didn't realize that the purpose of the
10343 descriptor had changed. Now we replace routers with a purpose other
10344 than bridge with bridge descriptors when fetching them. Bugfix on
10345 0.1.1.9-alpha. Bug 1776 not yet fixed because now we immediately
10346 refetch the descriptor with router purpose 'general', disabling
10348 - Fix a rare bug in rend_fn unit tests: we would fail a test when
10349 a randomly generated port is 0. Diagnosed by Matt Edman. Bugfix
10350 on 0.2.0.10-alpha; fixes bug 1808.
10351 - Exit nodes didn't recognize EHOSTUNREACH as a plausible error code,
10352 and so sent back END_STREAM_REASON_MISC. Clients now recognize a new
10353 stream ending reason for this case: END_STREAM_REASON_NOROUTE.
10354 Servers can start sending this code when enough clients recognize
10355 it. Also update the spec to reflect this new reason. Bugfix on
10356 0.1.0.1-rc; fixes part of bug 1793.
10357 - Delay geoip stats collection by bridges for 6 hours, not 2 hours,
10358 when we switch from being a public relay to a bridge. Otherwise
10359 there will still be clients that see the relay in their consensus,
10360 and the stats will end up wrong. Bugfix on 0.2.1.15-rc; fixes bug
10362 - Instead of giving an assertion failure on an internal mismatch
10363 on estimated freelist size, just log a BUG warning and try later.
10364 Mitigates but does not fix bug 1125.
10365 - Fix an assertion failure that could occur in caches or bridge users
10366 when using a very short voting interval on a testing network.
10367 Diagnosed by Robert Hogan. Fixes bug 1141; bugfix on 0.2.0.8-alpha.
10369 o Minor bugfixes (on 0.2.2.x):
10370 - Alter directory authorities to always consider Exit-flagged nodes
10371 as potential Guard nodes in their votes. The actual decision to
10372 use Exits as Guards is done in the consensus bandwidth weights.
10373 Fixes bug 1294; bugfix on 0.2.2.10-alpha.
10374 - When the controller is reporting the purpose of circuits that
10375 didn't finish building before the circuit build timeout, it was
10376 printing UNKNOWN_13. Now print EXPIRED. Bugfix on 0.2.2.14-alpha.
10377 - Our libevent version parsing code couldn't handle versions like
10378 1.4.14b-stable and incorrectly warned the user about using an
10379 old and broken version of libevent. Treat 1.4.14b-stable like
10380 1.4.14-stable when parsing the version. Fixes bug 1731; bugfix
10382 - Don't use substitution references like $(VAR:MOD) when
10383 $(asciidoc_files) is empty -- make(1) on NetBSD transforms
10384 '$(:x)' to 'x' rather than the empty string. This bites us in
10385 doc/ when configured with --disable-asciidoc. Bugfix on
10386 0.2.2.9-alpha; fixes bug 1773.
10387 - Remove a spurious hidden service server-side log notice about
10388 "Ancient non-dirty circuits". Bugfix on 0.2.2.14-alpha; fixes
10390 - Fix compilation with --with-dmalloc set. Bugfix on 0.2.2.6-alpha;
10392 - Correctly report written bytes on linked connections. Found while
10393 implementing 1790. Bugfix on 0.2.2.4-alpha.
10394 - Fix three memory leaks: one in circuit_build_times_parse_state(),
10395 one in dirvote_add_signatures_to_pending_consensus(), and one every
10396 time we parse a v3 network consensus. Bugfixes on 0.2.2.14-alpha,
10397 0.2.2.6-alpha, and 0.2.2.10-alpha respectively; fixes bug 1831.
10399 o Code simplifications and refactoring:
10400 - Take a first step towards making or.h smaller by splitting out
10401 function definitions for all source files in src/or/. Leave
10402 structures and defines in or.h for now.
10403 - Remove a bunch of unused function declarations as well as a block of
10404 #if 0'd code from the unit tests. Closes bug 1824.
10405 - New unit tests for exit-port history statistics; refactored exit
10406 statistics code to be more easily tested.
10407 - Remove the old debian/ directory from the main Tor distribution.
10408 The official Tor-for-debian git repository lives at the URL
10409 https://git.torproject.org/debian/tor.git
10412 Changes in version 0.2.2.14-alpha - 2010-07-12
10413 Tor 0.2.2.14-alpha greatly improves client-side handling of
10414 circuit build timeouts, which are used to estimate speed and improve
10415 performance. We also move to a much better GeoIP database, port Tor to
10416 Windows CE, introduce new compile flags that improve code security,
10417 add an eighth v3 directory authority, and address a lot of more
10421 - Tor directory authorities no longer crash when started with a
10422 cached-microdesc-consensus file in their data directory. Bugfix
10423 on 0.2.2.6-alpha; fixes bug 1532.
10424 - Treat an unset $HOME like an empty $HOME rather than triggering an
10425 assert. Bugfix on 0.0.8pre1; fixes bug 1522.
10426 - Ignore negative and large circuit build timeout values that can
10427 happen during a suspend or hibernate. These values caused various
10428 asserts to fire. Bugfix on 0.2.2.2-alpha; fixes bug 1245.
10429 - Alter calculation of Pareto distribution parameter 'Xm' for
10430 Circuit Build Timeout learning to use the weighted average of the
10431 top N=3 modes (because we have three entry guards). Considering
10432 multiple modes should improve the timeout calculation in some cases,
10433 and prevent extremely high timeout values. Bugfix on 0.2.2.2-alpha;
10435 - Alter calculation of Pareto distribution parameter 'Alpha' to use a
10436 right censored distribution model. This approach improves over the
10437 synthetic timeout generation approach that was producing insanely
10438 high timeout values. Now we calculate build timeouts using truncated
10439 times. Bugfix on 0.2.2.2-alpha; fixes bugs 1245 and 1335.
10440 - Do not close circuits that are under construction when they reach
10441 the circuit build timeout. Instead, leave them building (but do not
10442 use them) for up until the time corresponding to the 95th percentile
10443 on the Pareto CDF or 60 seconds, whichever is greater. This is done
10444 to provide better data for the new Pareto model. This percentile
10445 can be controlled by the consensus.
10448 - Move to the June 2010 Maxmind GeoLite country db (rather than the
10449 June 2009 ip-to-country GeoIP db) for our statistics that count
10450 how many users relays are seeing from each country. Now we have
10451 more accurate data for many African countries.
10452 - Port Tor to build and run correctly on Windows CE systems, using
10453 the wcecompat library. Contributed by Valerio Lupi.
10454 - New "--enable-gcc-hardening" ./configure flag (off by default)
10455 to turn on gcc compile time hardening options. It ensures
10456 that signed ints have defined behavior (-fwrapv), enables
10457 -D_FORTIFY_SOURCE=2 (requiring -O2), adds stack smashing protection
10458 with canaries (-fstack-protector-all), turns on ASLR protection if
10459 supported by the kernel (-fPIE, -pie), and adds additional security
10460 related warnings. Verified to work on Mac OS X and Debian Lenny.
10461 - New "--enable-linker-hardening" ./configure flag (off by default)
10462 to turn on ELF specific hardening features (relro, now). This does
10463 not work with Mac OS X or any other non-ELF binary format.
10465 o New directory authorities:
10466 - Set up maatuska (run by Linus Nordberg) as the eighth v3 directory
10470 - New config option "WarnUnsafeSocks 0" disables the warning that
10471 occurs whenever Tor receives a socks handshake using a version of
10472 the socks protocol that can only provide an IP address (rather
10473 than a hostname). Setups that do DNS locally over Tor are fine,
10474 and we shouldn't spam the logs in that case.
10475 - Convert the HACKING file to asciidoc, and add a few new sections
10476 to it, explaining how we use Git, how we make changelogs, and
10477 what should go in a patch.
10478 - Add a TIMEOUT_RATE keyword to the BUILDTIMEOUT_SET control port
10479 event, to give information on the current rate of circuit timeouts
10480 over our stored history.
10481 - Add ability to disable circuit build time learning via consensus
10482 parameter and via a LearnCircuitBuildTimeout config option. Also
10483 automatically disable circuit build time calculation if we are
10484 either a AuthoritativeDirectory, or if we fail to write our state
10485 file. Fixes bug 1296.
10486 - More gracefully handle corrupt state files, removing asserts
10487 in favor of saving a backup and resetting state.
10488 - Rename the "log.h" header to "torlog.h" so as to conflict with fewer
10492 - Build correctly on OSX with zlib 1.2.4 and higher with all warnings
10494 - When a2x fails, mention that the user could disable manpages instead
10495 of trying to fix their asciidoc installation.
10496 - Where available, use Libevent 2.0's periodic timers so that our
10497 once-per-second cleanup code gets called even more closely to
10498 once per second than it would otherwise. Fixes bug 943.
10499 - If you run a bridge that listens on multiple IP addresses, and
10500 some user configures a bridge address that uses a different IP
10501 address than your bridge writes in its router descriptor, and the
10502 user doesn't specify an identity key, their Tor would discard the
10503 descriptor because "it isn't one of our configured bridges", and
10504 fail to bootstrap. Now believe the descriptor and bootstrap anyway.
10505 Bugfix on 0.2.0.3-alpha.
10506 - If OpenSSL fails to make a duplicate of a private or public key, log
10507 an error message and try to exit cleanly. May help with debugging
10508 if bug 1209 ever remanifests.
10509 - Save a couple bytes in memory allocation every time we escape
10510 certain characters in a string. Patch from Florian Zumbiehl.
10511 - Make it explicit that we don't cannibalize one-hop circuits. This
10512 happens in the wild, but doesn't turn out to be a problem because
10513 we fortunately don't use those circuits. Many thanks to outofwords
10514 for the initial analysis and to swissknife who confirmed that
10515 two-hop circuits are actually created.
10516 - Make directory mirrors report non-zero dirreq-v[23]-shares again.
10517 Fixes bug 1564; bugfix on 0.2.2.9-alpha.
10518 - Eliminate a case where a circuit build time warning was displayed
10519 after network connectivity resumed. Bugfix on 0.2.2.2-alpha.
10522 Changes in version 0.2.1.26 - 2010-05-02
10523 Tor 0.2.1.26 addresses the recent connection and memory overload
10524 problems we've been seeing on relays, especially relays with their
10525 DirPort open. If your relay has been crashing, or you turned it off
10526 because it used too many resources, give this release a try.
10528 This release also fixes yet another instance of broken OpenSSL libraries
10529 that was causing some relays to drop out of the consensus.
10532 - Teach relays to defend themselves from connection overload. Relays
10533 now close idle circuits early if it looks like they were intended
10534 for directory fetches. Relays are also more aggressive about closing
10535 TLS connections that have no circuits on them. Such circuits are
10536 unlikely to be re-used, and tens of thousands of them were piling
10537 up at the fast relays, causing the relays to run out of sockets
10538 and memory. Bugfix on 0.2.0.22-rc (where clients started tunneling
10539 their directory fetches over TLS).
10540 - Fix SSL renegotiation behavior on OpenSSL versions like on Centos
10541 that claim to be earlier than 0.9.8m, but which have in reality
10542 backported huge swaths of 0.9.8m or 0.9.8n renegotiation
10543 behavior. Possible fix for some cases of bug 1346.
10544 - Directory mirrors were fetching relay descriptors only from v2
10545 directory authorities, rather than v3 authorities like they should.
10546 Only 2 v2 authorities remain (compared to 7 v3 authorities), leading
10547 to a serious bottleneck. Bugfix on 0.2.0.9-alpha. Fixes bug 1324.
10550 - Finally get rid of the deprecated and now harmful notion of "clique
10551 mode", where directory authorities maintain TLS connections to
10555 - In the util/threads test, no longer free the test_mutex before all
10556 worker threads have finished. Bugfix on 0.2.1.6-alpha.
10557 - The master thread could starve the worker threads quite badly on
10558 certain systems, causing them to run only partially in the allowed
10559 window. This resulted in test failures. Now the master thread sleeps
10560 occasionally for a few microseconds while the two worker-threads
10561 compete for the mutex. Bugfix on 0.2.0.1-alpha.
10564 Changes in version 0.2.2.13-alpha - 2010-04-24
10565 Tor 0.2.2.13-alpha addresses the recent connection and memory overload
10566 problems we've been seeing on relays, especially relays with their
10567 DirPort open. If your relay has been crashing, or you turned it off
10568 because it used too many resources, give this release a try.
10571 - Teach relays to defend themselves from connection overload. Relays
10572 now close idle circuits early if it looks like they were intended
10573 for directory fetches. Relays are also more aggressive about closing
10574 TLS connections that have no circuits on them. Such circuits are
10575 unlikely to be re-used, and tens of thousands of them were piling
10576 up at the fast relays, causing the relays to run out of sockets
10577 and memory. Bugfix on 0.2.0.22-rc (where clients started tunneling
10578 their directory fetches over TLS).
10581 - Finally get rid of the deprecated and now harmful notion of "clique
10582 mode", where directory authorities maintain TLS connections to
10584 - Directory authorities now do an immediate reachability check as soon
10585 as they hear about a new relay. This change should slightly reduce
10586 the time between setting up a relay and getting listed as running
10587 in the consensus. It should also improve the time between setting
10588 up a bridge and seeing use by bridge users.
10589 - Directory authorities no longer launch a TLS connection to every
10590 relay as they startup. Now that we have 2k+ descriptors cached,
10591 the resulting network hiccup is becoming a burden. Besides,
10592 authorities already avoid voting about Running for the first half
10593 hour of their uptime.
10596 Changes in version 0.2.2.12-alpha - 2010-04-20
10597 Tor 0.2.2.12-alpha fixes a critical bug in how directory authorities
10598 handle and vote on descriptors. It was causing relays to drop out of
10602 - Many relays have been falling out of the consensus lately because
10603 not enough authorities know about their descriptor for them to get
10604 a majority of votes. When we deprecated the v2 directory protocol,
10605 we got rid of the only way that v3 authorities can hear from each
10606 other about other descriptors. Now authorities examine every v3
10607 vote for new descriptors, and fetch them from that authority. Bugfix
10609 - Fix two typos in tor_vasprintf() that broke the compile on Windows,
10610 and a warning in or.h related to bandwidth_weight_rule_t that
10611 prevented clean compile on OS X. Fixes bug 1363; bugfix on
10613 - Fix a segfault on relays when DirReqStatistics is enabled
10614 and 24 hours pass. Bug found by keb. Fixes bug 1365; bugfix on
10618 - Demote a confusing TLS warning that relay operators might get when
10619 someone tries to talk to their OrPort. It is neither the operator's
10620 fault nor can they do anything about it. Fixes bug 1364; bugfix
10624 Changes in version 0.2.2.11-alpha - 2010-04-15
10625 Tor 0.2.2.11-alpha fixes yet another instance of broken OpenSSL
10626 libraries that was causing some relays to drop out of the consensus.
10629 - Directory mirrors were fetching relay descriptors only from v2
10630 directory authorities, rather than v3 authorities like they should.
10631 Only 2 v2 authorities remain (compared to 7 v3 authorities), leading
10632 to a serious bottleneck. Bugfix on 0.2.0.9-alpha. Fixes bug 1324.
10633 - Fix a parsing error that made every possible value of
10634 CircPriorityHalflifeMsec get treated as "1 msec". Bugfix
10635 on 0.2.2.7-alpha. Rename CircPriorityHalflifeMsec to
10636 CircuitPriorityHalflifeMsec, so authorities can tell newer relays
10637 about the option without breaking older ones.
10638 - Fix SSL renegotiation behavior on OpenSSL versions like on Centos
10639 that claim to be earlier than 0.9.8m, but which have in reality
10640 backported huge swaths of 0.9.8m or 0.9.8n renegotiation
10641 behavior. Possible fix for some cases of bug 1346.
10644 - Experiment with a more aggressive approach to preventing clients
10645 from making one-hop exit streams. Exit relays who want to try it
10646 out can set "RefuseUnknownExits 1" in their torrc, and then look
10647 for "Attempt by %s to open a stream" log messages. Let us know
10649 - Add support for statically linking zlib by specifying
10650 --enable-static-zlib, to go with our support for statically linking
10651 openssl and libevent. Resolves bug 1358.
10654 - Fix a segfault that happens whenever a Tor client that is using
10655 libevent2's bufferevents gets a hup signal. Bugfix on 0.2.2.5-alpha;
10657 - When we cleaned up the contrib/tor-exit-notice.html file, we left
10658 out the first line. Fixes bug 1295.
10659 - When building the manpage from a tarball, we required asciidoc, but
10660 the asciidoc -> roff/html conversion was already done for the
10661 tarball. Make 'make' complain only when we need asciidoc (either
10662 because we're compiling directly from git, or because we altered
10663 the asciidoc manpage in the tarball). Bugfix on 0.2.2.9-alpha.
10664 - When none of the directory authorities vote on any params, Tor
10665 segfaulted when trying to make the consensus from the votes. We
10666 didn't trigger the bug in practice, because authorities do include
10667 params in their votes. Bugfix on 0.2.2.10-alpha; fixes bug 1322.
10670 - In the util/threads test, no longer free the test_mutex before all
10671 worker threads have finished. Bugfix on 0.2.1.6-alpha.
10672 - The master thread could starve the worker threads quite badly on
10673 certain systems, causing them to run only partially in the allowed
10674 window. This resulted in test failures. Now the master thread sleeps
10675 occasionally for a few microseconds while the two worker-threads
10676 compete for the mutex. Bugfix on 0.2.0.1-alpha.
10679 Changes in version 0.2.2.10-alpha - 2010-03-07
10680 Tor 0.2.2.10-alpha fixes a regression introduced in 0.2.2.9-alpha that
10681 could prevent relays from guessing their IP address correctly. It also
10682 starts the groundwork for another client-side performance boost, since
10683 currently we're not making efficient use of relays that have both the
10684 Guard flag and the Exit flag.
10687 - Fix a regression from our patch for bug 1244 that caused relays
10688 to guess their IP address incorrectly if they didn't set Address
10689 in their torrc and/or their address fails to resolve. Bugfix on
10690 0.2.2.9-alpha; fixes bug 1269.
10692 o Major features (performance):
10693 - Directory authorities now compute consensus weightings that instruct
10694 clients how to weight relays flagged as Guard, Exit, Guard+Exit,
10695 and no flag. Clients that use these weightings will distribute
10696 network load more evenly across these different relay types. The
10697 weightings are in the consensus so we can change them globally in
10698 the future. Extra thanks to "outofwords" for finding some nasty
10699 security bugs in the first implementation of this feature.
10701 o Minor features (performance):
10702 - Always perform router selections using weighted relay bandwidth,
10703 even if we don't need a high capacity circuit at the time. Non-fast
10704 circuits now only differ from fast ones in that they can use relays
10705 not marked with the Fast flag. This "feature" could turn out to
10706 be a horrible bug; we should investigate more before it goes into
10710 - Allow disabling building of the manpages. Skipping the manpage
10711 speeds up the build considerably.
10713 o Minor bugfixes (on 0.2.2.x):
10714 - Fix a memleak in the EXTENDCIRCUIT logic. Spotted by coverity.
10715 Bugfix on 0.2.2.9-alpha.
10716 - Disallow values larger than INT32_MAX for PerConnBWRate|Burst
10717 config option. Bugfix on 0.2.2.7-alpha.
10718 - Ship the asciidoc-helper file in the tarball, so that people can
10719 build from source if they want to, and touching the .1.txt files
10720 doesn't break the build. Bugfix on 0.2.2.9-alpha.
10722 o Minor bugfixes (on 0.2.1.x or earlier):
10723 - Fix a dereference-then-NULL-check sequence when publishing
10724 descriptors. Bugfix on 0.2.1.5-alpha. Discovered by ekir; fixes
10726 - Fix another dereference-then-NULL-check sequence. Bugfix on
10727 0.2.1.14-rc. Discovered by ekir; fixes bug 1256.
10728 - Make sure we treat potentially not NUL-terminated strings correctly.
10729 Bugfix on 0.1.1.13-alpha. Discovered by rieo; fixes bug 1257.
10731 o Code simplifications and refactoring:
10732 - Fix some urls in the exit notice file and make it XHTML1.1 strict
10733 compliant. Based on a patch from Christian Kujau.
10734 - Don't use sed in asciidoc-helper anymore.
10735 - Make the build process fail if asciidoc cannot be found and
10736 building with asciidoc isn't disabled.
10739 Changes in version 0.2.2.9-alpha - 2010-02-22
10740 Tor 0.2.2.9-alpha makes Tor work again on the latest OS X, updates the
10741 location of a directory authority, and cleans up a bunch of small bugs.
10743 o Directory authority changes:
10744 - Change IP address for dannenberg (v3 directory authority), and
10745 remove moria2 (obsolete v1, v2 directory authority and v0 hidden
10746 service directory authority) from the list.
10749 - Make Tor work again on the latest OS X: when deciding whether to
10750 use strange flags to turn TLS renegotiation on, detect the OpenSSL
10751 version at run-time, not compile time. We need to do this because
10752 Apple doesn't update its dev-tools headers when it updates its
10753 libraries in a security patch.
10754 - Fix a potential buffer overflow in lookup_last_hid_serv_request()
10755 that could happen on 32-bit platforms with 64-bit time_t. Also fix
10756 a memory leak when requesting a hidden service descriptor we've
10757 requested before. Fixes bug 1242, bugfix on 0.2.0.18-alpha. Found
10759 - Authorities could be tricked into giving out the Exit flag to relays
10760 that didn't allow exiting to any ports. This bug could screw
10761 with load balancing and stats. Bugfix on 0.1.1.6-alpha; fixes bug
10762 1238. Bug discovered by Martin Kowalczyk.
10763 - When freeing a session key, zero it out completely. We only zeroed
10764 the first ptrsize bytes. Bugfix on 0.0.2pre8. Discovered and
10765 patched by ekir. Fixes bug 1254.
10768 - Fix static compilation by listing the openssl libraries in the right
10769 order. Bugfix on Tor 0.2.2.8-alpha; fixes bug 1237.
10770 - Resume handling .exit hostnames in a special way: originally we
10771 stripped the .exit part and used the requested exit relay. In
10772 0.2.2.1-alpha we stopped treating them in any special way, meaning
10773 if you use a .exit address then Tor will pass it on to the exit
10774 relay. Now we reject the .exit stream outright, since that behavior
10775 might be more expected by the user. Found and diagnosed by Scott
10776 Bennett and Downie on or-talk.
10777 - Don't spam the controller with events when we have no file
10778 descriptors available. Bugfix on 0.2.1.5-alpha. (Rate-limiting
10779 for log messages was already solved from bug 748.)
10780 - Avoid a bogus overlapped memcpy in tor_addr_copy(). Reported by
10782 - Make the DNSPort option work with libevent 2.x. Don't alter the
10783 behavior for libevent 1.x. Fixes bug 1143. Found by SwissTorExit.
10784 - Emit a GUARD DROPPED controller event for a case we missed.
10785 - Make more fields in the controller protocol case-insensitive, since
10786 control-spec.txt said they were.
10787 - Refactor resolve_my_address() to not use gethostbyname() anymore.
10788 Fixes bug 1244; bugfix on 0.0.2pre25. Reported by Mike Mestnik.
10789 - Fix a spec conformance issue: the network-status-version token
10790 must be the first token in a v3 consensus or vote. Discovered by
10791 parakeep. Bugfix on 0.2.0.3-alpha.
10793 o Code simplifications and refactoring:
10794 - Generate our manpage and HTML documentation using Asciidoc. This
10795 change should make it easier to maintain the documentation, and
10796 produce nicer HTML.
10797 - Remove the --enable-iphone option. According to reports from Marco
10798 Bonetti, Tor builds fine without any special tweaking on recent
10799 iPhone SDK versions.
10800 - Removed some unnecessary files from the source distribution. The
10801 AUTHORS file has now been merged into the people page on the
10802 website. The roadmaps and design doc can now be found in the
10803 projects directory in svn.
10804 - Enabled various circuit build timeout constants to be controlled
10805 by consensus parameters. Also set better defaults for these
10806 parameters based on experimentation on broadband and simulated
10807 high latency links.
10810 - The 'EXTENDCIRCUIT' control port command can now be used with
10811 a circ id of 0 and no path. This feature will cause Tor to build
10812 a new 'fast' general purpose circuit using its own path selection
10814 - Added a BUILDTIMEOUT_SET controller event to describe changes
10815 to the circuit build timeout.
10816 - Future-proof the controller protocol a bit by ignoring keyword
10817 arguments we do not recognize.
10818 - Expand homedirs passed to tor-checkkey. This should silence a
10819 coverity complaint about passing a user-supplied string into
10820 open() without checking it.
10823 Changes in version 0.2.1.25 - 2010-03-16
10824 Tor 0.2.1.25 fixes a regression introduced in 0.2.1.23 that could
10825 prevent relays from guessing their IP address correctly. It also fixes
10826 several minor potential security bugs.
10829 - Fix a regression from our patch for bug 1244 that caused relays
10830 to guess their IP address incorrectly if they didn't set Address
10831 in their torrc and/or their address fails to resolve. Bugfix on
10832 0.2.1.23; fixes bug 1269.
10833 - When freeing a session key, zero it out completely. We only zeroed
10834 the first ptrsize bytes. Bugfix on 0.0.2pre8. Discovered and
10835 patched by ekir. Fixes bug 1254.
10838 - Fix a dereference-then-NULL-check sequence when publishing
10839 descriptors. Bugfix on 0.2.1.5-alpha. Discovered by ekir; fixes
10841 - Fix another dereference-then-NULL-check sequence. Bugfix on
10842 0.2.1.14-rc. Discovered by ekir; fixes bug 1256.
10843 - Make sure we treat potentially not NUL-terminated strings correctly.
10844 Bugfix on 0.1.1.13-alpha. Discovered by rieo; fixes bug 1257.
10848 Changes in version 0.2.1.24 - 2010-02-21
10849 Tor 0.2.1.24 makes Tor work again on the latest OS X -- this time
10853 - Work correctly out-of-the-box with even more vendor-patched versions
10854 of OpenSSL. In particular, make it so Debian and OS X don't need
10855 customized patches to run/build.
10858 Changes in version 0.2.1.23 - 2010-02-13
10859 Tor 0.2.1.23 fixes a huge client-side performance bug, makes Tor work
10860 again on the latest OS X, and updates the location of a directory
10863 o Major bugfixes (performance):
10864 - We were selecting our guards uniformly at random, and then weighting
10865 which of our guards we'd use uniformly at random. This imbalance
10866 meant that Tor clients were severely limited on throughput (and
10867 probably latency too) by the first hop in their circuit. Now we
10868 select guards weighted by currently advertised bandwidth. We also
10869 automatically discard guards picked using the old algorithm. Fixes
10870 bug 1217; bugfix on 0.2.1.3-alpha. Found by Mike Perry.
10873 - Make Tor work again on the latest OS X: when deciding whether to
10874 use strange flags to turn TLS renegotiation on, detect the OpenSSL
10875 version at run-time, not compile time. We need to do this because
10876 Apple doesn't update its dev-tools headers when it updates its
10877 libraries in a security patch.
10878 - Fix a potential buffer overflow in lookup_last_hid_serv_request()
10879 that could happen on 32-bit platforms with 64-bit time_t. Also fix
10880 a memory leak when requesting a hidden service descriptor we've
10881 requested before. Fixes bug 1242, bugfix on 0.2.0.18-alpha. Found
10884 o Directory authority changes:
10885 - Change IP address for dannenberg (v3 directory authority), and
10886 remove moria2 (obsolete v1, v2 directory authority and v0 hidden
10887 service directory authority) from the list.
10890 - Refactor resolve_my_address() to not use gethostbyname() anymore.
10891 Fixes bug 1244; bugfix on 0.0.2pre25. Reported by Mike Mestnik.
10894 - Avoid a mad rush at the beginning of each month when each client
10895 rotates half of its guards. Instead we spread the rotation out
10896 throughout the month, but we still avoid leaving a precise timestamp
10897 in the state file about when we first picked the guard. Improves
10898 over the behavior introduced in 0.1.2.17.
10901 Changes in version 0.2.2.8-alpha - 2010-01-26
10902 Tor 0.2.2.8-alpha fixes a crash bug in 0.2.2.7-alpha that has been
10903 causing bridge relays to disappear. If you're running a bridge,
10907 - Fix a memory corruption bug on bridges that occured during the
10908 inclusion of stats data in extra-info descriptors. Also fix the
10909 interface for geoip_get_bridge_stats* to prevent similar bugs in
10910 the future. Diagnosis by Tas, patch by Karsten and Sebastian.
10911 Fixes bug 1208; bugfix on 0.2.2.7-alpha.
10914 - Ignore OutboundBindAddress when connecting to localhost.
10915 Connections to localhost need to come _from_ localhost, or else
10916 local servers (like DNS and outgoing HTTP/SOCKS proxies) will often
10920 Changes in version 0.2.2.7-alpha - 2010-01-19
10921 Tor 0.2.2.7-alpha fixes a huge client-side performance bug, as well
10922 as laying the groundwork for further relay-side performance fixes. It
10923 also starts cleaning up client behavior with respect to the EntryNodes,
10924 ExitNodes, and StrictNodes config options.
10926 This release also rotates two directory authority keys, due to a
10927 security breach of some of the Torproject servers.
10929 o Directory authority changes:
10930 - Rotate keys (both v3 identity and relay identity) for moria1
10933 o Major features (performance):
10934 - We were selecting our guards uniformly at random, and then weighting
10935 which of our guards we'd use uniformly at random. This imbalance
10936 meant that Tor clients were severely limited on throughput (and
10937 probably latency too) by the first hop in their circuit. Now we
10938 select guards weighted by currently advertised bandwidth. We also
10939 automatically discard guards picked using the old algorithm. Fixes
10940 bug 1217; bugfix on 0.2.1.3-alpha. Found by Mike Perry.
10941 - When choosing which cells to relay first, relays can now favor
10942 circuits that have been quiet recently, to provide lower latency
10943 for low-volume circuits. By default, relays enable or disable this
10944 feature based on a setting in the consensus. You can override
10945 this default by using the new "CircuitPriorityHalflife" config
10946 option. Design and code by Ian Goldberg, Can Tang, and Chris
10948 - Add separate per-conn write limiting to go with the per-conn read
10949 limiting. We added a global write limit in Tor 0.1.2.5-alpha,
10950 but never per-conn write limits.
10951 - New consensus params "bwconnrate" and "bwconnburst" to let us
10952 rate-limit client connections as they enter the network. It's
10953 controlled in the consensus so we can turn it on and off for
10954 experiments. It's starting out off. Based on proposal 163.
10956 o Major features (relay selection options):
10957 - Switch to a StrictNodes config option, rather than the previous
10958 "StrictEntryNodes" / "StrictExitNodes" separation that was missing a
10959 "StrictExcludeNodes" option.
10960 - If EntryNodes, ExitNodes, ExcludeNodes, or ExcludeExitNodes
10961 change during a config reload, mark and discard all our origin
10962 circuits. This fix should address edge cases where we change the
10963 config options and but then choose a circuit that we created before
10965 - If EntryNodes or ExitNodes are set, be more willing to use an
10966 unsuitable (e.g. slow or unstable) circuit. The user asked for it,
10968 - Make EntryNodes config option much more aggressive even when
10969 StrictNodes is not set. Before it would prepend your requested
10970 entrynodes to your list of guard nodes, but feel free to use others
10971 after that. Now it chooses only from your EntryNodes if any of
10972 those are available, and only falls back to others if a) they're
10973 all down and b) StrictNodes is not set.
10974 - Now we refresh your entry guards from EntryNodes at each consensus
10975 fetch -- rather than just at startup and then they slowly rot as
10976 the network changes.
10979 - Stop bridge directory authorities from answering dbg-stability.txt
10980 directory queries, which would let people fetch a list of all
10981 bridge identities they track. Bugfix on 0.2.1.6-alpha.
10984 - Log a notice when we get a new control connection. Now it's easier
10985 for security-conscious users to recognize when a local application
10986 is knocking on their controller door. Suggested by bug 1196.
10987 - New config option "CircuitStreamTimeout" to override our internal
10988 timeout schedule for how many seconds until we detach a stream from
10989 a circuit and try a new circuit. If your network is particularly
10990 slow, you might want to set this to a number like 60.
10991 - New controller command "getinfo config-text". It returns the
10992 contents that Tor would write if you send it a SAVECONF command,
10993 so the controller can write the file to disk itself.
10994 - New options for SafeLogging to allow scrubbing only log messages
10995 generated while acting as a relay.
10996 - Ship the bridges spec file in the tarball too.
10997 - Avoid a mad rush at the beginning of each month when each client
10998 rotates half of its guards. Instead we spread the rotation out
10999 throughout the month, but we still avoid leaving a precise timestamp
11000 in the state file about when we first picked the guard. Improves
11001 over the behavior introduced in 0.1.2.17.
11003 o Minor bugfixes (compiling):
11004 - Fix compilation on OS X 10.3, which has a stub mlockall() but
11005 hides it. Bugfix on 0.2.2.6-alpha.
11006 - Fix compilation on Solaris by removing support for the
11007 DisableAllSwap config option. Solaris doesn't have an rlimit for
11008 mlockall, so we cannot use it safely. Fixes bug 1198; bugfix on
11011 o Minor bugfixes (crashes):
11012 - Do not segfault when writing buffer stats when we haven't observed
11013 a single circuit to report about. Found by Fabian Lanze. Bugfix on
11015 - If we're in the pathological case where there's no exit bandwidth
11016 but there is non-exit bandwidth, or no guard bandwidth but there
11017 is non-guard bandwidth, don't crash during path selection. Bugfix
11019 - Fix an impossible-to-actually-trigger buffer overflow in relay
11020 descriptor generation. Bugfix on 0.1.0.15.
11022 o Minor bugfixes (privacy):
11023 - Fix an instance where a Tor directory mirror might accidentally
11024 log the IP address of a misbehaving Tor client. Bugfix on
11026 - Don't list Windows capabilities in relay descriptors. We never made
11027 use of them, and maybe it's a bad idea to publish them. Bugfix
11030 o Minor bugfixes (other):
11031 - Resolve an edge case in path weighting that could make us misweight
11032 our relay selection. Fixes bug 1203; bugfix on 0.0.8rc1.
11033 - Fix statistics on client numbers by country as seen by bridges that
11034 were broken in 0.2.2.1-alpha. Also switch to reporting full 24-hour
11035 intervals instead of variable 12-to-48-hour intervals.
11036 - After we free an internal connection structure, overwrite it
11037 with a different memory value than we use for overwriting a freed
11038 internal circuit structure. Should help with debugging. Suggested
11040 - Update our OpenSSL 0.9.8l fix so that it works with OpenSSL 0.9.8m
11043 o Removed features:
11044 - Remove the HSAuthorityRecordStats option that version 0 hidden
11045 service authorities could have used to track statistics of overall
11046 hidden service usage.
11049 Changes in version 0.2.1.22 - 2010-01-19
11050 Tor 0.2.1.22 fixes a critical privacy problem in bridge directory
11051 authorities -- it would tell you its whole history of bridge descriptors
11052 if you make the right directory request. This stable update also
11053 rotates two of the seven v3 directory authority keys and locations.
11055 o Directory authority changes:
11056 - Rotate keys (both v3 identity and relay identity) for moria1
11060 - Stop bridge directory authorities from answering dbg-stability.txt
11061 directory queries, which would let people fetch a list of all
11062 bridge identities they track. Bugfix on 0.2.1.6-alpha.
11065 Changes in version 0.2.1.21 - 2009-12-21
11066 Tor 0.2.1.21 fixes an incompatibility with the most recent OpenSSL
11067 library. If you use Tor on Linux / Unix and you're getting SSL
11068 renegotiation errors, upgrading should help. We also recommend an
11069 upgrade if you're an exit relay.
11072 - Work around a security feature in OpenSSL 0.9.8l that prevents our
11073 handshake from working unless we explicitly tell OpenSSL that we
11074 are using SSL renegotiation safely. We are, of course, but OpenSSL
11075 0.9.8l won't work unless we say we are.
11076 - Avoid crashing if the client is trying to upload many bytes and the
11077 circuit gets torn down at the same time, or if the flip side
11078 happens on the exit relay. Bugfix on 0.2.0.1-alpha; fixes bug 1150.
11081 - Do not refuse to learn about authority certs and v2 networkstatus
11082 documents that are older than the latest consensus. This bug might
11083 have degraded client bootstrapping. Bugfix on 0.2.0.10-alpha.
11084 Spotted and fixed by xmux.
11085 - Fix a couple of very-hard-to-trigger memory leaks, and one hard-to-
11086 trigger platform-specific option misparsing case found by Coverity
11088 - Fix a compilation warning on Fedora 12 by removing an impossible-to-
11089 trigger assert. Fixes bug 1173.
11092 Changes in version 0.2.2.6-alpha - 2009-11-19
11093 Tor 0.2.2.6-alpha lays the groundwork for many upcoming features:
11094 support for the new lower-footprint "microdescriptor" directory design,
11095 future-proofing our consensus format against new hash functions or
11096 other changes, and an Android port. It also makes Tor compatible with
11097 the upcoming OpenSSL 0.9.8l release, and fixes a variety of bugs.
11100 - Directory authorities can now create, vote on, and serve multiple
11101 parallel formats of directory data as part of their voting process.
11102 Partially implements Proposal 162: "Publish the consensus in
11104 - Directory authorities can now agree on and publish small summaries
11105 of router information that clients can use in place of regular
11106 server descriptors. This transition will eventually allow clients
11107 to use far less bandwidth for downloading information about the
11108 network. Begins the implementation of Proposal 158: "Clients
11109 download consensus + microdescriptors".
11110 - The directory voting system is now extensible to use multiple hash
11111 algorithms for signatures and resource selection. Newer formats
11112 are signed with SHA256, with a possibility for moving to a better
11113 hash algorithm in the future.
11114 - New DisableAllSwap option. If set to 1, Tor will attempt to lock all
11115 current and future memory pages via mlockall(). On supported
11116 platforms (modern Linux and probably BSD but not Windows or OS X),
11117 this should effectively disable any and all attempts to page out
11118 memory. This option requires that you start your Tor as root --
11119 if you use DisableAllSwap, please consider using the User option
11120 to properly reduce the privileges of your Tor.
11121 - Numerous changes, bugfixes, and workarounds from Nathan Freitas
11122 to help Tor build correctly for Android phones.
11125 - Work around a security feature in OpenSSL 0.9.8l that prevents our
11126 handshake from working unless we explicitly tell OpenSSL that we
11127 are using SSL renegotiation safely. We are, but OpenSSL 0.9.8l
11128 won't work unless we say we are.
11131 - Fix a crash bug when trying to initialize the evdns module in
11132 Libevent 2. Bugfix on 0.2.1.16-rc.
11133 - Stop logging at severity 'warn' when some other Tor client tries
11134 to establish a circuit with us using weak DH keys. It's a protocol
11135 violation, but that doesn't mean ordinary users need to hear about
11136 it. Fixes the bug part of bug 1114. Bugfix on 0.1.0.13.
11137 - Do not refuse to learn about authority certs and v2 networkstatus
11138 documents that are older than the latest consensus. This bug might
11139 have degraded client bootstrapping. Bugfix on 0.2.0.10-alpha.
11140 Spotted and fixed by xmux.
11141 - Fix numerous small code-flaws found by Coverity Scan Rung 3.
11142 - If all authorities restart at once right before a consensus vote,
11143 nobody will vote about "Running", and clients will get a consensus
11144 with no usable relays. Instead, authorities refuse to build a
11145 consensus if this happens. Bugfix on 0.2.0.10-alpha; fixes bug 1066.
11146 - If your relay can't keep up with the number of incoming create
11147 cells, it would log one warning per failure into your logs. Limit
11148 warnings to 1 per minute. Bugfix on 0.0.2pre10; fixes bug 1042.
11149 - Bridges now use "reject *:*" as their default exit policy. Bugfix
11150 on 0.2.0.3-alpha; fixes bug 1113.
11151 - Fix a memory leak on directory authorities during voting that was
11152 introduced in 0.2.2.1-alpha. Found via valgrind.
11155 Changes in version 0.2.1.20 - 2009-10-15
11156 Tor 0.2.1.20 fixes a crash bug when you're accessing many hidden
11157 services at once, prepares for more performance improvements, and
11158 fixes a bunch of smaller bugs.
11160 The Windows and OS X bundles also include a more recent Vidalia,
11161 and switch from Privoxy to Polipo.
11163 The OS X installers are now drag and drop. It's best to un-install
11164 Tor/Vidalia and then install this new bundle, rather than upgrade. If
11165 you want to upgrade, you'll need to update the paths for Tor and Polipo
11166 in the Vidalia Settings window.
11169 - Send circuit or stream sendme cells when our window has decreased
11170 by 100 cells, not when it has decreased by 101 cells. Bug uncovered
11171 by Karsten when testing the "reduce circuit window" performance
11172 patch. Bugfix on the 54th commit on Tor -- from July 2002,
11173 before the release of Tor 0.0.0. This is the new winner of the
11175 - Fix a remotely triggerable memory leak when a consensus document
11176 contains more than one signature from the same voter. Bugfix on
11178 - Avoid segfault in rare cases when finishing an introduction circuit
11179 as a client and finding out that we don't have an introduction key
11180 for it. Fixes bug 1073. Reported by Aaron Swartz.
11183 - Tor now reads the "circwindow" parameter out of the consensus,
11184 and uses that value for its circuit package window rather than the
11185 default of 1000 cells. Begins the implementation of proposal 168.
11187 o New directory authorities:
11188 - Set up urras (run by Jacob Appelbaum) as the seventh v3 directory
11190 - Move moria1 and tonga to alternate IP addresses.
11193 - Fix a signed/unsigned compile warning in 0.2.1.19.
11194 - Fix possible segmentation fault on directory authorities. Bugfix on
11196 - Fix an extremely rare infinite recursion bug that could occur if
11197 we tried to log a message after shutting down the log subsystem.
11198 Found by Matt Edman. Bugfix on 0.2.0.16-alpha.
11199 - Fix an obscure bug where hidden services on 64-bit big-endian
11200 systems might mis-read the timestamp in v3 introduce cells, and
11201 refuse to connect back to the client. Discovered by "rotor".
11202 Bugfix on 0.2.1.6-alpha.
11203 - We were triggering a CLOCK_SKEW controller status event whenever
11204 we connect via the v2 connection protocol to any relay that has
11205 a wrong clock. Instead, we should only inform the controller when
11206 it's a trusted authority that claims our clock is wrong. Bugfix
11207 on 0.2.0.20-rc; starts to fix bug 1074. Reported by SwissTorExit.
11208 - We were telling the controller about CHECKING_REACHABILITY and
11209 REACHABILITY_FAILED status events whenever we launch a testing
11210 circuit or notice that one has failed. Instead, only tell the
11211 controller when we want to inform the user of overall success or
11212 overall failure. Bugfix on 0.1.2.6-alpha. Fixes bug 1075. Reported
11214 - Don't warn when we're using a circuit that ends with a node
11215 excluded in ExcludeExitNodes, but the circuit is not used to access
11216 the outside world. This should help fix bug 1090. Bugfix on
11218 - Work around a small memory leak in some versions of OpenSSL that
11219 stopped the memory used by the hostname TLS extension from being
11223 - Add a "getinfo status/accepted-server-descriptor" controller
11224 command, which is the recommended way for controllers to learn
11225 whether our server descriptor has been successfully received by at
11226 least on directory authority. Un-recommend good-server-descriptor
11227 getinfo and status events until we have a better design for them.
11230 Changes in version 0.2.2.5-alpha - 2009-10-11
11231 Tor 0.2.2.5-alpha fixes a few compile problems in 0.2.2.4-alpha.
11234 - Make the tarball compile again. Oops. Bugfix on 0.2.2.4-alpha.
11236 o Directory authorities:
11237 - Temporarily (just for this release) move dizum to an alternate
11241 Changes in version 0.2.2.4-alpha - 2009-10-10
11242 Tor 0.2.2.4-alpha fixes more crash bugs in 0.2.2.2-alpha. It also
11243 introduces a new unit test framework, shifts directry authority
11244 addresses around to reduce the impact from recent blocking events,
11245 and fixes a few smaller bugs.
11248 - Fix several more asserts in the circuit_build_times code, for
11249 example one that causes Tor to fail to start once we have
11250 accumulated 5000 build times in the state file. Bugfixes on
11251 0.2.2.2-alpha; fixes bug 1108.
11253 o New directory authorities:
11254 - Move moria1 and Tonga to alternate IP addresses.
11257 - Log SSL state transitions at debug level during handshake, and
11258 include SSL states in error messages. This may help debug future
11259 SSL handshake issues.
11260 - Add a new "Handshake" log domain for activities that happen
11261 during the TLS handshake.
11262 - Revert to the "June 3 2009" ip-to-country file. The September one
11263 seems to have removed most US IP addresses.
11264 - Directory authorities now reject Tor relays with versions less than
11265 0.1.2.14. This step cuts out four relays from the current network,
11266 none of which are very big.
11269 - Fix a couple of smaller issues with gathering statistics. Bugfixes
11271 - Fix two memory leaks in the error case of
11272 circuit_build_times_parse_state(). Bugfix on 0.2.2.2-alpha.
11273 - Don't count one-hop circuits when we're estimating how long it
11274 takes circuits to build on average. Otherwise we'll set our circuit
11275 build timeout lower than we should. Bugfix on 0.2.2.2-alpha.
11276 - Directory authorities no longer change their opinion of, or vote on,
11277 whether a router is Running, unless they have themselves been
11278 online long enough to have some idea. Bugfix on 0.2.0.6-alpha.
11281 o Code simplifications and refactoring:
11282 - Revise our unit tests to use the "tinytest" framework, so we
11283 can run tests in their own processes, have smarter setup/teardown
11284 code, and so on. The unit test code has moved to its own
11285 subdirectory, and has been split into multiple modules.
11288 Changes in version 0.2.2.3-alpha - 2009-09-23
11289 Tor 0.2.2.3-alpha fixes a few crash bugs in 0.2.2.2-alpha.
11292 - Fix an overzealous assert in our new circuit build timeout code.
11293 Bugfix on 0.2.2.2-alpha; fixes bug 1103.
11296 - If the networkstatus consensus tells us that we should use a
11297 negative circuit package window, ignore it. Otherwise we'll
11298 believe it and then trigger an assert. Bugfix on 0.2.2.2-alpha.
11301 Changes in version 0.2.2.2-alpha - 2009-09-21
11302 Tor 0.2.2.2-alpha introduces our latest performance improvement for
11303 clients: Tor tracks the average time it takes to build a circuit, and
11304 avoids using circuits that take too long to build. For fast connections,
11305 this feature can cut your expected latency in half. For slow or flaky
11306 connections, it could ruin your Tor experience. Let us know if it does!
11309 - Tor now tracks how long it takes to build client-side circuits
11310 over time, and adapts its timeout to local network performance.
11311 Since a circuit that takes a long time to build will also provide
11312 bad performance, we get significant latency improvements by
11313 discarding the slowest 20% of circuits. Specifically, Tor creates
11314 circuits more aggressively than usual until it has enough data
11315 points for a good timeout estimate. Implements proposal 151.
11316 We are especially looking for reports (good and bad) from users with
11317 both EDGE and broadband connections that can move from broadband
11318 to EDGE and find out if the build-time data in the .tor/state gets
11319 reset without loss of Tor usability. You should also see a notice
11320 log message telling you that Tor has reset its timeout.
11321 - Directory authorities can now vote on arbitary integer values as
11322 part of the consensus process. This is designed to help set
11323 network-wide parameters. Implements proposal 167.
11324 - Tor now reads the "circwindow" parameter out of the consensus,
11325 and uses that value for its circuit package window rather than the
11326 default of 1000 cells. Begins the implementation of proposal 168.
11329 - Fix a remotely triggerable memory leak when a consensus document
11330 contains more than one signature from the same voter. Bugfix on
11334 - Fix an extremely rare infinite recursion bug that could occur if
11335 we tried to log a message after shutting down the log subsystem.
11336 Found by Matt Edman. Bugfix on 0.2.0.16-alpha.
11337 - Fix parsing for memory or time units given without a space between
11338 the number and the unit. Bugfix on 0.2.2.1-alpha; fixes bug 1076.
11339 - A networkstatus vote must contain exactly one signature. Spec
11340 conformance issue. Bugfix on 0.2.0.3-alpha.
11341 - Fix an obscure bug where hidden services on 64-bit big-endian
11342 systems might mis-read the timestamp in v3 introduce cells, and
11343 refuse to connect back to the client. Discovered by "rotor".
11344 Bugfix on 0.2.1.6-alpha.
11345 - We were triggering a CLOCK_SKEW controller status event whenever
11346 we connect via the v2 connection protocol to any relay that has
11347 a wrong clock. Instead, we should only inform the controller when
11348 it's a trusted authority that claims our clock is wrong. Bugfix
11349 on 0.2.0.20-rc; starts to fix bug 1074. Reported by SwissTorExit.
11350 - We were telling the controller about CHECKING_REACHABILITY and
11351 REACHABILITY_FAILED status events whenever we launch a testing
11352 circuit or notice that one has failed. Instead, only tell the
11353 controller when we want to inform the user of overall success or
11354 overall failure. Bugfix on 0.1.2.6-alpha. Fixes bug 1075. Reported
11356 - Don't warn when we're using a circuit that ends with a node
11357 excluded in ExcludeExitNodes, but the circuit is not used to access
11358 the outside world. This should help fix bug 1090, but more problems
11359 remain. Bugfix on 0.2.1.6-alpha.
11360 - Work around a small memory leak in some versions of OpenSSL that
11361 stopped the memory used by the hostname TLS extension from being
11363 - Make our 'torify' script more portable; if we have only one of
11364 'torsocks' or 'tsocks' installed, don't complain to the user;
11365 and explain our warning about tsocks better.
11368 - Add a "getinfo status/accepted-server-descriptor" controller
11369 command, which is the recommended way for controllers to learn
11370 whether our server descriptor has been successfully received by at
11371 least on directory authority. Un-recommend good-server-descriptor
11372 getinfo and status events until we have a better design for them.
11373 - Update to the "September 4 2009" ip-to-country file.
11376 Changes in version 0.2.2.1-alpha - 2009-08-26
11377 Tor 0.2.2.1-alpha disables ".exit" address notation by default, allows
11378 Tor clients to bootstrap on networks where only port 80 is reachable,
11379 makes it more straightforward to support hardware crypto accelerators,
11380 and starts the groundwork for gathering stats safely at relays.
11383 - Start the process of disabling ".exit" address notation, since it
11384 can be used for a variety of esoteric application-level attacks
11385 on users. To reenable it, set "AllowDotExit 1" in your torrc. Fix
11388 o New directory authorities:
11389 - Set up urras (run by Jacob Appelbaum) as the seventh v3 directory
11393 - New AccelName and AccelDir options add support for dynamic OpenSSL
11394 hardware crypto acceleration engines.
11395 - Tor now supports tunneling all of its outgoing connections over
11396 a SOCKS proxy, using the SOCKS4Proxy and/or SOCKS5Proxy
11397 configuration options. Code by Christopher Davis.
11400 - Send circuit or stream sendme cells when our window has decreased
11401 by 100 cells, not when it has decreased by 101 cells. Bug uncovered
11402 by Karsten when testing the "reduce circuit window" performance
11403 patch. Bugfix on the 54th commit on Tor -- from July 2002,
11404 before the release of Tor 0.0.0. This is the new winner of the
11407 o New options for gathering stats safely:
11408 - Directory mirrors that set "DirReqStatistics 1" write statistics
11409 about directory requests to disk every 24 hours. As compared to the
11410 --enable-geoip-stats flag in 0.2.1.x, there are a few improvements:
11411 1) stats are written to disk exactly every 24 hours; 2) estimated
11412 shares of v2 and v3 requests are determined as mean values, not at
11413 the end of a measurement period; 3) unresolved requests are listed
11414 with country code '??'; 4) directories also measure download times.
11415 - Exit nodes that set "ExitPortStatistics 1" write statistics on the
11416 number of exit streams and transferred bytes per port to disk every
11418 - Relays that set "CellStatistics 1" write statistics on how long
11419 cells spend in their circuit queues to disk every 24 hours.
11420 - Entry nodes that set "EntryStatistics 1" write statistics on the
11421 rough number and origins of connecting clients to disk every 24
11423 - Relays that write any of the above statistics to disk and set
11424 "ExtraInfoStatistics 1" include the past 24 hours of statistics in
11425 their extra-info documents.
11428 - New --digests command-line switch to output the digests of the
11429 source files Tor was built with.
11430 - The "torify" script now uses torsocks where available.
11431 - The memarea code now uses a sentinel value at the end of each area
11432 to make sure nothing writes beyond the end of an area. This might
11433 help debug some conceivable causes of bug 930.
11434 - Time and memory units in the configuration file can now be set to
11435 fractional units. For example, "2.5 GB" is now a valid value for
11437 - Certain Tor clients (such as those behind check.torproject.org) may
11438 want to fetch the consensus in an extra early manner. To enable this
11439 a user may now set FetchDirInfoExtraEarly to 1. This also depends on
11440 setting FetchDirInfoEarly to 1. Previous behavior will stay the same
11441 as only certain clients who must have this information sooner should
11443 - Instead of adding the svn revision to the Tor version string, report
11444 the git commit (when we're building from a git checkout).
11447 - If any of the v3 certs we download are unparseable, we should
11448 actually notice the failure so we don't retry indefinitely. Bugfix
11449 on 0.2.0.x; reported by "rotator".
11450 - If the cached cert file is unparseable, warn but don't exit.
11451 - Fix possible segmentation fault on directory authorities. Bugfix on
11453 - When Tor fails to parse a descriptor of any kind, dump it to disk.
11454 Might help diagnosing bug 1051.
11456 o Deprecated and removed features:
11457 - The controller no longer accepts the old obsolete "addr-mappings/"
11458 or "unregistered-servers-" GETINFO values.
11459 - Hidden services no longer publish version 0 descriptors, and clients
11460 do not request or use version 0 descriptors. However, the old hidden
11461 service authorities still accept and serve version 0 descriptors
11462 when contacted by older hidden services/clients.
11463 - The EXTENDED_EVENTS and VERBOSE_NAMES controller features are now
11464 always on; using them is necessary for correct forward-compatible
11466 - Remove support for .noconnect style addresses. Nobody was using
11467 them, and they provided another avenue for detecting Tor users
11468 via application-level web tricks.
11470 o Packaging changes:
11471 - Upgrade Vidalia from 0.1.15 to 0.2.3 in the Windows and OS X
11472 installer bundles. See
11473 https://trac.vidalia-project.net/browser/vidalia/tags/vidalia-0.2.3/CHANGELOG
11474 for details of what's new in Vidalia 0.2.3.
11475 - Windows Vidalia Bundle: update Privoxy from 3.0.6 to 3.0.14-beta.
11476 - OS X Vidalia Bundle: move to Polipo 1.0.4 with Tor specific
11477 configuration file, rather than the old Privoxy.
11478 - OS X Vidalia Bundle: Vidalia, Tor, and Polipo are compiled as
11479 x86-only for better compatibility with OS X 10.6, aka Snow Leopard.
11480 - OS X Tor Expert Bundle: Tor is compiled as x86-only for
11481 better compatibility with OS X 10.6, aka Snow Leopard.
11482 - OS X Vidalia Bundle: The multi-package installer is now replaced
11483 by a simple drag and drop to the /Applications folder. This change
11484 occurred with the upgrade to Vidalia 0.2.3.
11487 Changes in version 0.2.1.19 - 2009-07-28
11488 Tor 0.2.1.19 fixes a major bug with accessing and providing hidden
11489 services on Tor 0.2.1.3-alpha through 0.2.1.18.
11492 - Make accessing hidden services on 0.2.1.x work right again.
11493 Bugfix on 0.2.1.3-alpha; workaround for bug 1038. Diagnosis and
11494 part of patch provided by "optimist".
11497 - When a relay/bridge is writing out its identity key fingerprint to
11498 the "fingerprint" file and to its logs, write it without spaces. Now
11499 it will look like the fingerprints in our bridges documentation,
11500 and confuse fewer users.
11503 - Relays no longer publish a new server descriptor if they change
11504 their MaxAdvertisedBandwidth config option but it doesn't end up
11505 changing their advertised bandwidth numbers. Bugfix on 0.2.0.28-rc;
11506 fixes bug 1026. Patch from Sebastian.
11507 - Avoid leaking memory every time we get a create cell but we have
11508 so many already queued that we refuse it. Bugfix on 0.2.0.19-alpha;
11509 fixes bug 1034. Reported by BarkerJr.
11512 Changes in version 0.2.1.18 - 2009-07-24
11513 Tor 0.2.1.18 lays the foundations for performance improvements,
11514 adds status events to help users diagnose bootstrap problems, adds
11515 optional authentication/authorization for hidden services, fixes a
11516 variety of potential anonymity problems, and includes a huge pile of
11517 other features and bug fixes.
11520 - Add LIBS=-lrt to Makefile.am so the Tor RPMs use a static libevent.
11523 Changes in version 0.2.1.17-rc - 2009-07-07
11524 Tor 0.2.1.17-rc marks the fourth -- and hopefully last -- release
11525 candidate for the 0.2.1.x series. It lays the groundwork for further
11526 client performance improvements, and also fixes a big bug with directory
11527 authorities that were causing them to assign Guard and Stable flags
11530 The Windows bundles also finally include the geoip database that we
11531 thought we'd been shipping since 0.2.0.x (oops), and the OS X bundles
11532 should actually install Torbutton rather than giving you a cryptic
11533 failure message (oops).
11536 - Clients now use the bandwidth values in the consensus, rather than
11537 the bandwidth values in each relay descriptor. This approach opens
11538 the door to more accurate bandwidth estimates once the directory
11539 authorities start doing active measurements. Implements more of
11543 - When Tor clients restart after 1-5 days, they discard all their
11544 cached descriptors as too old, but they still use the cached
11545 consensus document. This approach is good for robustness, but
11546 bad for performance: since they don't know any bandwidths, they
11547 end up choosing at random rather than weighting their choice by
11548 speed. Fixed by the above feature of putting bandwidths in the
11549 consensus. Bugfix on 0.2.0.x.
11550 - Directory authorities were neglecting to mark relays down in their
11551 internal histories if the relays fall off the routerlist without
11552 ever being found unreachable. So there were relays in the histories
11553 that haven't been seen for eight months, and are listed as being
11554 up for eight months. This wreaked havoc on the "median wfu"
11555 and "median mtbf" calculations, in turn making Guard and Stable
11556 flags very wrong, hurting network performance. Fixes bugs 696 and
11557 969. Bugfix on 0.2.0.6-alpha.
11560 - Serve the DirPortFrontPage page even when we have been approaching
11561 our quotas recently. Fixes bug 1013; bugfix on 0.2.1.8-alpha.
11562 - The control port would close the connection before flushing long
11563 replies, such as the network consensus, if a QUIT command was issued
11564 before the reply had completed. Now, the control port flushes all
11565 pending replies before closing the connection. Also fixed a spurious
11566 warning when a QUIT command is issued after a malformed or rejected
11567 AUTHENTICATE command, but before the connection was closed. Patch
11568 by Marcus Griep. Bugfix on 0.2.0.x; fixes bugs 1015 and 1016.
11569 - When we can't find an intro key for a v2 hidden service descriptor,
11570 fall back to the v0 hidden service descriptor and log a bug message.
11571 Workaround for bug 1024.
11572 - Fix a log message that did not respect the SafeLogging option.
11576 - If we're a relay and we change our IP address, be more verbose
11577 about the reason that made us change. Should help track down
11578 further bugs for relays on dynamic IP addresses.
11581 Changes in version 0.2.0.35 - 2009-06-24
11583 - Avoid crashing in the presence of certain malformed descriptors.
11584 Found by lark, and by automated fuzzing.
11585 - Fix an edge case where a malicious exit relay could convince a
11586 controller that the client's DNS question resolves to an internal IP
11587 address. Bug found and fixed by "optimist"; bugfix on 0.1.2.8-beta.
11590 - Finally fix the bug where dynamic-IP relays disappear when their
11591 IP address changes: directory mirrors were mistakenly telling
11592 them their old address if they asked via begin_dir, so they
11593 never got an accurate answer about their new address, so they
11594 just vanished after a day. For belt-and-suspenders, relays that
11595 don't set Address in their config now avoid using begin_dir for
11596 all direct connections. Should fix bugs 827, 883, and 900.
11597 - Fix a timing-dependent, allocator-dependent, DNS-related crash bug
11598 that would occur on some exit nodes when DNS failures and timeouts
11599 occurred in certain patterns. Fix for bug 957.
11602 - When starting with a cache over a few days old, do not leak
11603 memory for the obsolete router descriptors in it. Bugfix on
11604 0.2.0.33; fixes bug 672.
11605 - Hidden service clients didn't use a cached service descriptor that
11606 was older than 15 minutes, but wouldn't fetch a new one either,
11607 because there was already one in the cache. Now, fetch a v2
11608 descriptor unless the same descriptor was added to the cache within
11609 the last 15 minutes. Fixes bug 997; reported by Marcus Griep.
11612 Changes in version 0.2.1.16-rc - 2009-06-20
11613 Tor 0.2.1.16-rc speeds up performance for fast exit relays, and fixes
11614 a bunch of minor bugs.
11617 - Fix an edge case where a malicious exit relay could convince a
11618 controller that the client's DNS question resolves to an internal IP
11619 address. Bug found and fixed by "optimist"; bugfix on 0.1.2.8-beta.
11621 o Major performance improvements (on 0.2.0.x):
11622 - Disable and refactor some debugging checks that forced a linear scan
11623 over the whole server-side DNS cache. These accounted for over 50%
11624 of CPU time on a relatively busy exit node's gprof profile. Found
11626 - Disable some debugging checks that appeared in exit node profile
11630 - Update to the "June 3 2009" ip-to-country file.
11631 - Do not have tor-resolve automatically refuse all .onion addresses;
11632 if AutomapHostsOnResolve is set in your torrc, this will work fine.
11634 o Minor bugfixes (on 0.2.0.x):
11635 - Log correct error messages for DNS-related network errors on
11637 - Fix a race condition that could cause crashes or memory corruption
11638 when running as a server with a controller listening for log
11640 - Avoid crashing when we have a policy specified in a DirPolicy or
11641 SocksPolicy or ReachableAddresses option with ports set on it,
11642 and we re-load the policy. May fix bug 996.
11643 - Hidden service clients didn't use a cached service descriptor that
11644 was older than 15 minutes, but wouldn't fetch a new one either,
11645 because there was already one in the cache. Now, fetch a v2
11646 descriptor unless the same descriptor was added to the cache within
11647 the last 15 minutes. Fixes bug 997; reported by Marcus Griep.
11649 o Minor bugfixes (on 0.2.1.x):
11650 - Don't warn users about low port and hibernation mix when they
11651 provide a *ListenAddress directive to fix that. Bugfix on
11653 - When switching back and forth between bridge mode, do not start
11654 gathering GeoIP data until two hours have passed.
11655 - Do not complain that the user has requested an excluded node as
11656 an exit when the node is not really an exit. This could happen
11657 because the circuit was for testing, or an introduction point.
11661 Changes in version 0.2.1.15-rc - 2009-05-25
11662 Tor 0.2.1.15-rc marks the second release candidate for the 0.2.1.x
11663 series. It fixes a major bug on fast exit relays, as well as a variety
11664 of more minor bugs.
11666 o Major bugfixes (on 0.2.0.x):
11667 - Fix a timing-dependent, allocator-dependent, DNS-related crash bug
11668 that would occur on some exit nodes when DNS failures and timeouts
11669 occurred in certain patterns. Fix for bug 957.
11671 o Minor bugfixes (on 0.2.0.x):
11672 - Actually return -1 in the error case for read_bandwidth_usage().
11673 Harmless bug, since we currently don't care about the return value
11674 anywhere. Bugfix on 0.2.0.9-alpha.
11675 - Provide a more useful log message if bug 977 (related to buffer
11676 freelists) ever reappears, and do not crash right away.
11677 - Fix an assertion failure on 64-bit platforms when we allocated
11678 memory right up to the end of a memarea, then realigned the memory
11679 one step beyond the end. Fixes a possible cause of bug 930.
11680 - Protect the count of open sockets with a mutex, so we can't
11681 corrupt it when two threads are closing or opening sockets at once.
11682 Fix for bug 939. Bugfix on 0.2.0.1-alpha.
11683 - Don't allow a bridge to publish its router descriptor to a
11684 non-bridge directory authority. Fixes part of bug 932.
11685 - When we change to or from being a bridge, reset our counts of
11686 client usage by country. Fixes bug 932.
11687 - Fix a bug that made stream bandwidth get misreported to the
11689 - Stop using malloc_usable_size() to use more area than we had
11690 actually allocated: it was safe, but made valgrind really unhappy.
11691 - Fix a memory leak when v3 directory authorities load their keys
11692 and cert from disk. Bugfix on 0.2.0.1-alpha.
11694 o Minor bugfixes (on 0.2.1.x):
11695 - Fix use of freed memory when deciding to mark a non-addable
11696 descriptor as never-downloadable. Bugfix on 0.2.1.9-alpha.
11699 Changes in version 0.2.1.14-rc - 2009-04-12
11700 Tor 0.2.1.14-rc marks the first release candidate for the 0.2.1.x
11701 series. It begins fixing some major performance problems, and also
11702 finally addresses the bug that was causing relays on dynamic IP
11703 addresses to fall out of the directory.
11706 - Clients replace entry guards that were chosen more than a few months
11707 ago. This change should significantly improve client performance,
11708 especially once more people upgrade, since relays that have been
11709 a guard for a long time are currently overloaded.
11711 o Major bugfixes (on 0.2.0):
11712 - Finally fix the bug where dynamic-IP relays disappear when their
11713 IP address changes: directory mirrors were mistakenly telling
11714 them their old address if they asked via begin_dir, so they
11715 never got an accurate answer about their new address, so they
11716 just vanished after a day. For belt-and-suspenders, relays that
11717 don't set Address in their config now avoid using begin_dir for
11718 all direct connections. Should fix bugs 827, 883, and 900.
11719 - Relays were falling out of the networkstatus consensus for
11720 part of a day if they changed their local config but the
11721 authorities discarded their new descriptor as "not sufficiently
11722 different". Now directory authorities accept a descriptor as changed
11723 if bandwidthrate or bandwidthburst changed. Partial fix for bug 962;
11724 patch by Sebastian.
11725 - Avoid crashing in the presence of certain malformed descriptors.
11726 Found by lark, and by automated fuzzing.
11729 - When generating circuit events with verbose nicknames for
11730 controllers, try harder to look up nicknames for routers on a
11731 circuit. (Previously, we would look in the router descriptors we had
11732 for nicknames, but not in the consensus.) Partial fix for bug 941.
11733 - If the bridge config line doesn't specify a port, assume 443.
11734 This makes bridge lines a bit smaller and easier for users to
11736 - Raise the minimum bandwidth to be a relay from 20000 bytes to 20480
11737 bytes (aka 20KB/s), to match our documentation. Also update
11738 directory authorities so they always assign the Fast flag to relays
11739 with 20KB/s of capacity. Now people running relays won't suddenly
11740 find themselves not seeing any use, if the network gets faster
11742 - Update to the "April 3 2009" ip-to-country file.
11745 - Avoid trying to print raw memory to the logs when we decide to
11746 give up on downloading a given relay descriptor. Bugfix on
11748 - In tor-resolve, when the Tor client to use is specified by
11749 <hostname>:<port>, actually use the specified port rather than
11750 defaulting to 9050. Bugfix on 0.2.1.6-alpha.
11751 - Make directory usage recording work again. Bugfix on 0.2.1.6-alpha.
11752 - When starting with a cache over a few days old, do not leak
11753 memory for the obsolete router descriptors in it. Bugfix on
11755 - Avoid double-free on list of successfully uploaded hidden
11756 service discriptors. Fix for bug 948. Bugfix on 0.2.1.6-alpha.
11757 - Change memarea_strndup() implementation to work even when
11758 duplicating a string at the end of a page. This bug was
11759 harmless for now, but could have meant crashes later. Fix by
11760 lark. Bugfix on 0.2.1.1-alpha.
11761 - Limit uploaded directory documents to be 16M rather than 500K.
11762 The directory authorities were refusing v3 consensus votes from
11763 other authorities, since the votes are now 504K. Fixes bug 959;
11764 bugfix on 0.0.2pre17 (where we raised it from 50K to 500K ;).
11765 - Directory authorities should never send a 503 "busy" response to
11766 requests for votes or keys. Bugfix on 0.2.0.8-alpha; exposed by
11770 Changes in version 0.2.1.13-alpha - 2009-03-09
11771 Tor 0.2.1.13-alpha includes another big pile of minor bugfixes and
11772 cleanups. We're finally getting close to a release candidate.
11775 - Correctly update the list of which countries we exclude as
11776 exits, when the GeoIP file is loaded or reloaded. Diagnosed by
11777 lark. Bugfix on 0.2.1.6-alpha.
11779 o Minor bugfixes (on 0.2.0.x and earlier):
11780 - Automatically detect MacOSX versions earlier than 10.4.0, and
11781 disable kqueue from inside Tor when running with these versions.
11782 We previously did this from the startup script, but that was no
11783 help to people who didn't use the startup script. Resolves bug 863.
11784 - When we had picked an exit node for a connection, but marked it as
11785 "optional", and it turned out we had no onion key for the exit,
11786 stop wanting that exit and try again. This situation may not
11787 be possible now, but will probably become feasible with proposal
11788 158. Spotted by rovv. Fixes another case of bug 752.
11789 - Clients no longer cache certificates for authorities they do not
11790 recognize. Bugfix on 0.2.0.9-alpha.
11791 - When we can't transmit a DNS request due to a network error, retry
11792 it after a while, and eventually transmit a failing response to
11793 the RESOLVED cell. Bugfix on 0.1.2.5-alpha.
11794 - If the controller claimed responsibility for a stream, but that
11795 stream never finished making its connection, it would live
11796 forever in circuit_wait state. Now we close it after SocksTimeout
11797 seconds. Bugfix on 0.1.2.7-alpha; reported by Mike Perry.
11798 - Drop begin cells to a hidden service if they come from the middle
11799 of a circuit. Patch from lark.
11800 - When we erroneously receive two EXTEND cells for the same circuit
11801 ID on the same connection, drop the second. Patch from lark.
11802 - Fix a crash that occurs on exit nodes when a nameserver request
11803 timed out. Bugfix on 0.1.2.1-alpha; our CLEAR debugging code had
11804 been suppressing the bug since 0.1.2.10-alpha. Partial fix for
11806 - Do not assume that a stack-allocated character array will be
11807 64-bit aligned on platforms that demand that uint64_t access is
11808 aligned. Possible fix for bug 604.
11809 - Parse dates and IPv4 addresses in a locale- and libc-independent
11810 manner, to avoid platform-dependent behavior on malformed input.
11811 - Build correctly when configured to build outside the main source
11812 path. Patch from Michael Gold.
11813 - We were already rejecting relay begin cells with destination port
11814 of 0. Now also reject extend cells with destination port or address
11815 of 0. Suggested by lark.
11817 o Minor bugfixes (on 0.2.1.x):
11818 - Don't re-extend introduction circuits if we ran out of RELAY_EARLY
11819 cells. Bugfix on 0.2.1.3-alpha. Fixes more of bug 878.
11820 - If we're an exit node, scrub the IP address to which we are exiting
11821 in the logs. Bugfix on 0.2.1.8-alpha.
11824 - On Linux, use the prctl call to re-enable core dumps when the user
11826 - New controller event NEWCONSENSUS that lists the networkstatus
11827 lines for every recommended relay. Now controllers like Torflow
11828 can keep up-to-date on which relays they should be using.
11829 - Update to the "February 26 2009" ip-to-country file.
11832 Changes in version 0.2.0.34 - 2009-02-08
11833 Tor 0.2.0.34 features several more security-related fixes. You should
11834 upgrade, especially if you run an exit relay (remote crash) or a
11835 directory authority (remote infinite loop), or you're on an older
11836 (pre-XP) or not-recently-patched Windows (remote exploit).
11838 This release marks end-of-life for Tor 0.1.2.x. Those Tor versions
11839 have many known flaws, and nobody should be using them. You should
11840 upgrade. If you're using a Linux or BSD and its packages are obsolete,
11841 stop using those packages and upgrade anyway.
11844 - Fix an infinite-loop bug on handling corrupt votes under certain
11845 circumstances. Bugfix on 0.2.0.8-alpha.
11846 - Fix a temporary DoS vulnerability that could be performed by
11847 a directory mirror. Bugfix on 0.2.0.9-alpha; reported by lark.
11848 - Avoid a potential crash on exit nodes when processing malformed
11849 input. Remote DoS opportunity. Bugfix on 0.2.0.33.
11850 - Do not accept incomplete ipv4 addresses (like 192.168.0) as valid.
11851 Spec conformance issue. Bugfix on Tor 0.0.2pre27.
11854 - Fix compilation on systems where time_t is a 64-bit integer.
11855 Patch from Matthias Drochner.
11856 - Don't consider expiring already-closed client connections. Fixes
11857 bug 893. Bugfix on 0.0.2pre20.
11860 Changes in version 0.2.1.12-alpha - 2009-02-08
11861 Tor 0.2.1.12-alpha features several more security-related fixes. You
11862 should upgrade, especially if you run an exit relay (remote crash) or
11863 a directory authority (remote infinite loop), or you're on an older
11864 (pre-XP) or not-recently-patched Windows (remote exploit). It also
11865 includes a big pile of minor bugfixes and cleanups.
11868 - Fix an infinite-loop bug on handling corrupt votes under certain
11869 circumstances. Bugfix on 0.2.0.8-alpha.
11870 - Fix a temporary DoS vulnerability that could be performed by
11871 a directory mirror. Bugfix on 0.2.0.9-alpha; reported by lark.
11872 - Avoid a potential crash on exit nodes when processing malformed
11873 input. Remote DoS opportunity. Bugfix on 0.2.1.7-alpha.
11876 - Let controllers actually ask for the "clients_seen" event for
11877 getting usage summaries on bridge relays. Bugfix on 0.2.1.10-alpha;
11878 reported by Matt Edman.
11879 - Fix a compile warning on OSX Panther. Fixes bug 913; bugfix against
11881 - Fix a bug in address parsing that was preventing bridges or hidden
11882 service targets from being at IPv6 addresses.
11883 - Solve a bug that kept hardware crypto acceleration from getting
11884 enabled when accounting was turned on. Fixes bug 907. Bugfix on
11886 - Remove a bash-ism from configure.in to build properly on non-Linux
11887 platforms. Bugfix on 0.2.1.1-alpha.
11888 - Fix code so authorities _actually_ send back X-Descriptor-Not-New
11889 headers. Bugfix on 0.2.0.10-alpha.
11890 - Don't consider expiring already-closed client connections. Fixes
11891 bug 893. Bugfix on 0.0.2pre20.
11892 - Fix another interesting corner-case of bug 891 spotted by rovv:
11893 Previously, if two hosts had different amounts of clock drift, and
11894 one of them created a new connection with just the wrong timing,
11895 the other might decide to deprecate the new connection erroneously.
11896 Bugfix on 0.1.1.13-alpha.
11897 - Resolve a very rare crash bug that could occur when the user forced
11898 a nameserver reconfiguration during the middle of a nameserver
11899 probe. Fixes bug 526. Bugfix on 0.1.2.1-alpha.
11900 - Support changing value of ServerDNSRandomizeCase during SIGHUP.
11901 Bugfix on 0.2.1.7-alpha.
11902 - If we're using bridges and our network goes away, be more willing
11903 to forgive our bridges and try again when we get an application
11904 request. Bugfix on 0.2.0.x.
11907 - Support platforms where time_t is 64 bits long. (Congratulations,
11908 NetBSD!) Patch from Matthias Drochner.
11909 - Add a 'getinfo status/clients-seen' controller command, in case
11910 controllers want to hear clients_seen events but connect late.
11913 - Disable GCC's strict alias optimization by default, to avoid the
11914 likelihood of its introducing subtle bugs whenever our code violates
11915 the letter of C99's alias rules.
11918 Changes in version 0.2.0.33 - 2009-01-21
11919 Tor 0.2.0.33 fixes a variety of bugs that were making relays less
11920 useful to users. It also finally fixes a bug where a relay or client
11921 that's been off for many days would take a long time to bootstrap.
11923 This update also fixes an important security-related bug reported by
11924 Ilja van Sprundel. You should upgrade. (We'll send out more details
11925 about the bug once people have had some time to upgrade.)
11928 - Fix a heap-corruption bug that may be remotely triggerable on
11929 some platforms. Reported by Ilja van Sprundel.
11932 - When a stream at an exit relay is in state "resolving" or
11933 "connecting" and it receives an "end" relay cell, the exit relay
11934 would silently ignore the end cell and not close the stream. If
11935 the client never closes the circuit, then the exit relay never
11936 closes the TCP connection. Bug introduced in Tor 0.1.2.1-alpha;
11937 reported by "wood".
11938 - When sending CREATED cells back for a given circuit, use a 64-bit
11939 connection ID to find the right connection, rather than an addr:port
11940 combination. Now that we can have multiple OR connections between
11941 the same ORs, it is no longer possible to use addr:port to uniquely
11942 identify a connection.
11943 - Bridge relays that had DirPort set to 0 would stop fetching
11944 descriptors shortly after startup, and then briefly resume
11945 after a new bandwidth test and/or after publishing a new bridge
11946 descriptor. Bridge users that try to bootstrap from them would
11947 get a recent networkstatus but would get descriptors from up to
11948 18 hours earlier, meaning most of the descriptors were obsolete
11949 already. Reported by Tas; bugfix on 0.2.0.13-alpha.
11950 - Prevent bridge relays from serving their 'extrainfo' document
11951 to anybody who asks, now that extrainfo docs include potentially
11952 sensitive aggregated client geoip summaries. Bugfix on
11954 - If the cached networkstatus consensus is more than five days old,
11955 discard it rather than trying to use it. In theory it could be
11956 useful because it lists alternate directory mirrors, but in practice
11957 it just means we spend many minutes trying directory mirrors that
11958 are long gone from the network. Also discard router descriptors as
11959 we load them if they are more than five days old, since the onion
11960 key is probably wrong by now. Bugfix on 0.2.0.x. Fixes bug 887.
11963 - Do not mark smartlist_bsearch_idx() function as ATTR_PURE. This bug
11964 could make gcc generate non-functional binary search code. Bugfix
11966 - Build correctly on platforms without socklen_t.
11967 - Compile without warnings on solaris.
11968 - Avoid potential crash on internal error during signature collection.
11969 Fixes bug 864. Patch from rovv.
11970 - Correct handling of possible malformed authority signing key
11971 certificates with internal signature types. Fixes bug 880.
11972 Bugfix on 0.2.0.3-alpha.
11973 - Fix a hard-to-trigger resource leak when logging credential status.
11975 - When we can't initialize DNS because the network is down, do not
11976 automatically stop Tor from starting. Instead, we retry failed
11977 dns_init() every 10 minutes, and change the exit policy to reject
11978 *:* until one succeeds. Fixes bug 691.
11979 - Use 64 bits instead of 32 bits for connection identifiers used with
11980 the controller protocol, to greatly reduce risk of identifier reuse.
11981 - When we're choosing an exit node for a circuit, and we have
11982 no pending streams, choose a good general exit rather than one that
11983 supports "all the pending streams". Bugfix on 0.1.1.x. Fix by rovv.
11984 - Fix another case of assuming, when a specific exit is requested,
11985 that we know more than the user about what hosts it allows.
11986 Fixes one case of bug 752. Patch from rovv.
11987 - Clip the MaxCircuitDirtiness config option to a minimum of 10
11988 seconds. Warn the user if lower values are given in the
11989 configuration. Bugfix on 0.1.0.1-rc. Patch by Sebastian.
11990 - Clip the CircuitBuildTimeout to a minimum of 30 seconds. Warn the
11991 user if lower values are given in the configuration. Bugfix on
11992 0.1.1.17-rc. Patch by Sebastian.
11993 - Fix a memory leak when we decline to add a v2 rendezvous descriptor to
11994 the cache because we already had a v0 descriptor with the same ID.
11995 Bugfix on 0.2.0.18-alpha.
11996 - Fix a race condition when freeing keys shared between main thread
11997 and CPU workers that could result in a memory leak. Bugfix on
11998 0.1.0.1-rc. Fixes bug 889.
11999 - Send a valid END cell back when a client tries to connect to a
12000 nonexistent hidden service port. Bugfix on 0.1.2.15. Fixes bug
12001 840. Patch from rovv.
12002 - Check which hops rendezvous stream cells are associated with to
12003 prevent possible guess-the-streamid injection attacks from
12004 intermediate hops. Fixes another case of bug 446. Based on patch
12006 - If a broken client asks a non-exit router to connect somewhere,
12007 do not even do the DNS lookup before rejecting the connection.
12008 Fixes another case of bug 619. Patch from rovv.
12009 - When a relay gets a create cell it can't decrypt (e.g. because it's
12010 using the wrong onion key), we were dropping it and letting the
12011 client time out. Now actually answer with a destroy cell. Fixes
12012 bug 904. Bugfix on 0.0.2pre8.
12014 o Minor bugfixes (hidden services):
12015 - Do not throw away existing introduction points on SIGHUP. Bugfix on
12016 0.0.6pre1. Patch by Karsten. Fixes bug 874.
12019 - Report the case where all signatures in a detached set are rejected
12020 differently than the case where there is an error handling the
12022 - When we realize that another process has modified our cached
12023 descriptors, print out a more useful error message rather than
12024 triggering an assertion. Fixes bug 885. Patch from Karsten.
12025 - Implement the 0x20 hack to better resist DNS poisoning: set the
12026 case on outgoing DNS requests randomly, and reject responses that do
12027 not match the case correctly. This logic can be disabled with the
12028 ServerDNSRamdomizeCase setting, if you are using one of the 0.3%
12029 of servers that do not reliably preserve case in replies. See
12030 "Increased DNS Forgery Resistance through 0x20-Bit Encoding"
12032 - Check DNS replies for more matching fields to better resist DNS
12034 - Never use OpenSSL compression: it wastes RAM and CPU trying to
12035 compress cells, which are basically all encrypted, compressed, or
12039 Changes in version 0.2.1.11-alpha - 2009-01-20
12040 Tor 0.2.1.11-alpha finishes fixing the "if your Tor is off for a
12041 week it will take a long time to bootstrap again" bug. It also fixes
12042 an important security-related bug reported by Ilja van Sprundel. You
12043 should upgrade. (We'll send out more details about the bug once people
12044 have had some time to upgrade.)
12047 - Fix a heap-corruption bug that may be remotely triggerable on
12048 some platforms. Reported by Ilja van Sprundel.
12051 - Discard router descriptors as we load them if they are more than
12052 five days old. Otherwise if Tor is off for a long time and then
12053 starts with cached descriptors, it will try to use the onion
12054 keys in those obsolete descriptors when building circuits. Bugfix
12055 on 0.2.0.x. Fixes bug 887.
12058 - Try to make sure that the version of Libevent we're running with
12059 is binary-compatible with the one we built with. May address bug
12061 - Make setting ServerDNSRandomizeCase to 0 actually work. Bugfix
12062 for bug 905. Bugfix on 0.2.1.7-alpha.
12063 - Add a new --enable-local-appdata configuration switch to change
12064 the default location of the datadir on win32 from APPDATA to
12065 LOCAL_APPDATA. In the future, we should migrate to LOCAL_APPDATA
12066 entirely. Patch from coderman.
12069 - Make outbound DNS packets respect the OutboundBindAddress setting.
12070 Fixes the bug part of bug 798. Bugfix on 0.1.2.2-alpha.
12071 - When our circuit fails at the first hop (e.g. we get a destroy
12072 cell back), avoid using that OR connection anymore, and also
12073 tell all the one-hop directory requests waiting for it that they
12074 should fail. Bugfix on 0.2.1.3-alpha.
12075 - In the torify(1) manpage, mention that tsocks will leak your
12079 Changes in version 0.2.1.10-alpha - 2009-01-06
12080 Tor 0.2.1.10-alpha fixes two major bugs in bridge relays (one that
12081 would make the bridge relay not so useful if it had DirPort set to 0,
12082 and one that could let an attacker learn a little bit of information
12083 about the bridge's users), and a bug that would cause your Tor relay
12084 to ignore a circuit create request it can't decrypt (rather than reply
12085 with an error). It also fixes a wide variety of other bugs.
12088 - If the cached networkstatus consensus is more than five days old,
12089 discard it rather than trying to use it. In theory it could
12090 be useful because it lists alternate directory mirrors, but in
12091 practice it just means we spend many minutes trying directory
12092 mirrors that are long gone from the network. Helps bug 887 a bit;
12094 - Bridge relays that had DirPort set to 0 would stop fetching
12095 descriptors shortly after startup, and then briefly resume
12096 after a new bandwidth test and/or after publishing a new bridge
12097 descriptor. Bridge users that try to bootstrap from them would
12098 get a recent networkstatus but would get descriptors from up to
12099 18 hours earlier, meaning most of the descriptors were obsolete
12100 already. Reported by Tas; bugfix on 0.2.0.13-alpha.
12101 - Prevent bridge relays from serving their 'extrainfo' document
12102 to anybody who asks, now that extrainfo docs include potentially
12103 sensitive aggregated client geoip summaries. Bugfix on
12107 - New controller event "clients_seen" to report a geoip-based summary
12108 of which countries we've seen clients from recently. Now controllers
12109 like Vidalia can show bridge operators that they're actually making
12111 - Build correctly against versions of OpenSSL 0.9.8 or later built
12112 without support for deprecated functions.
12113 - Update to the "December 19 2008" ip-to-country file.
12115 o Minor bugfixes (on 0.2.0.x):
12116 - Authorities now vote for the Stable flag for any router whose
12117 weighted MTBF is at least 5 days, regardless of the mean MTBF.
12118 - Do not remove routers as too old if we do not have any consensus
12119 document. Bugfix on 0.2.0.7-alpha.
12120 - Do not accept incomplete ipv4 addresses (like 192.168.0) as valid.
12121 Spec conformance issue. Bugfix on Tor 0.0.2pre27.
12122 - When an exit relay resolves a stream address to a local IP address,
12123 do not just keep retrying that same exit relay over and
12124 over. Instead, just close the stream. Addresses bug 872. Bugfix
12125 on 0.2.0.32. Patch from rovv.
12126 - If a hidden service sends us an END cell, do not consider
12127 retrying the connection; just close it. Patch from rovv.
12128 - When we made bridge authorities stop serving bridge descriptors over
12129 unencrypted links, we also broke DirPort reachability testing for
12130 bridges. So bridges with a non-zero DirPort were printing spurious
12131 warns to their logs. Bugfix on 0.2.0.16-alpha. Fixes bug 709.
12132 - When a relay gets a create cell it can't decrypt (e.g. because it's
12133 using the wrong onion key), we were dropping it and letting the
12134 client time out. Now actually answer with a destroy cell. Fixes
12135 bug 904. Bugfix on 0.0.2pre8.
12136 - Squeeze 2-5% out of client performance (according to oprofile) by
12137 improving the implementation of some policy-manipulation functions.
12139 o Minor bugfixes (on 0.2.1.x):
12140 - Make get_interface_address() function work properly again; stop
12141 guessing the wrong parts of our address as our address.
12142 - Do not cannibalize a circuit if we're out of RELAY_EARLY cells to
12143 send on that circuit. Otherwise we might violate the proposal-110
12144 limit. Bugfix on 0.2.1.3-alpha. Partial fix for bug 878. Diagnosis
12146 - When we're sending non-EXTEND cells to the first hop in a circuit,
12147 for example to use an encrypted directory connection, we don't need
12148 to use RELAY_EARLY cells: the first hop knows what kind of cell
12149 it is, and nobody else can even see the cell type. Conserving
12150 RELAY_EARLY cells makes it easier to cannibalize circuits like
12152 - Stop logging nameserver addresses in reverse order.
12153 - If we are retrying a directory download slowly over and over, do
12154 not automatically give up after the 254th failure. Bugfix on
12156 - Resume reporting accurate "stream end" reasons to the local control
12157 port. They were lost in the changes for Proposal 148. Bugfix on
12160 o Deprecated and removed features:
12161 - The old "tor --version --version" command, which would print out
12162 the subversion "Id" of most of the source files, is now removed. It
12163 turned out to be less useful than we'd expected, and harder to
12166 o Code simplifications and refactoring:
12167 - Change our header file guard macros to be less likely to conflict
12168 with system headers. Adam Langley noticed that we were conflicting
12169 with log.h on Android.
12170 - Tool-assisted documentation cleanup. Nearly every function or
12171 static variable in Tor should have its own documentation now.
12174 Changes in version 0.2.1.9-alpha - 2008-12-25
12175 Tor 0.2.1.9-alpha fixes many more bugs, some of them security-related.
12177 o New directory authorities:
12178 - gabelmoo (the authority run by Karsten Loesing) now has a new
12182 - Never use a connection with a mismatched address to extend a
12183 circuit, unless that connection is canonical. A canonical
12184 connection is one whose address is authenticated by the router's
12185 identity key, either in a NETINFO cell or in a router descriptor.
12186 - Avoid a possible memory corruption bug when receiving hidden service
12187 descriptors. Bugfix on 0.2.1.6-alpha.
12190 - Fix a logic error that would automatically reject all but the first
12191 configured DNS server. Bugfix on 0.2.1.5-alpha. Possible fix for
12192 part of bug 813/868. Bug spotted by coderman.
12193 - When a stream at an exit relay is in state "resolving" or
12194 "connecting" and it receives an "end" relay cell, the exit relay
12195 would silently ignore the end cell and not close the stream. If
12196 the client never closes the circuit, then the exit relay never
12197 closes the TCP connection. Bug introduced in 0.1.2.1-alpha;
12198 reported by "wood".
12199 - When we can't initialize DNS because the network is down, do not
12200 automatically stop Tor from starting. Instead, retry failed
12201 dns_init() every 10 minutes, and change the exit policy to reject
12202 *:* until one succeeds. Fixes bug 691.
12205 - Give a better error message when an overzealous init script says
12206 "sudo -u username tor --user username". Makes Bug 882 easier for
12208 - When a directory authority gives us a new guess for our IP address,
12209 log which authority we used. Hopefully this will help us debug
12210 the recent complaints about bad IP address guesses.
12211 - Detect svn revision properly when we're using git-svn.
12212 - Try not to open more than one descriptor-downloading connection
12213 to an authority at once. This should reduce load on directory
12214 authorities. Fixes bug 366.
12215 - Add cross-certification to newly generated certificates, so that
12216 a signing key is enough information to look up a certificate.
12217 Partial implementation of proposal 157.
12218 - Start serving certificates by <identity digest, signing key digest>
12219 pairs. Partial implementation of proposal 157.
12220 - Clients now never report any stream end reason except 'MISC'.
12221 Implements proposal 148.
12222 - On platforms with a maximum syslog string length, truncate syslog
12223 messages to that length ourselves, rather than relying on the
12224 system to do it for us.
12225 - Optimize out calls to time(NULL) that occur for every IO operation,
12226 or for every cell. On systems where time() is a slow syscall,
12227 this fix will be slightly helpful.
12228 - Exit servers can now answer resolve requests for ip6.arpa addresses.
12229 - When we download a descriptor that we then immediately (as
12230 a directory authority) reject, do not retry downloading it right
12231 away. Should save some bandwidth on authorities. Fix for bug
12232 888. Patch by Sebastian Hahn.
12233 - When a download gets us zero good descriptors, do not notify
12234 Tor that new directory information has arrived.
12235 - Avoid some nasty corner cases in the logic for marking connections
12236 as too old or obsolete or noncanonical for circuits. Partial
12239 o Minor features (controller):
12240 - New CONSENSUS_ARRIVED event to note when a new consensus has
12241 been fetched and validated.
12242 - When we realize that another process has modified our cached
12243 descriptors file, print out a more useful error message rather
12244 than triggering an assertion. Fixes bug 885. Patch from Karsten.
12245 - Add an internal-use-only __ReloadTorrcOnSIGHUP option for
12246 controllers to prevent SIGHUP from reloading the
12247 configuration. Fixes bug 856.
12250 - Resume using the correct "REASON=" stream when telling the
12251 controller why we closed a stream. Bugfix in 0.2.1.1-alpha.
12252 - When a canonical connection appears later in our internal list
12253 than a noncanonical one for a given OR ID, always use the
12254 canonical one. Bugfix on 0.2.0.12-alpha. Fixes bug 805.
12256 - Clip the MaxCircuitDirtiness config option to a minimum of 10
12257 seconds. Warn the user if lower values are given in the
12258 configuration. Bugfix on 0.1.0.1-rc. Patch by Sebastian.
12259 - Clip the CircuitBuildTimeout to a minimum of 30 seconds. Warn the
12260 user if lower values are given in the configuration. Bugfix on
12261 0.1.1.17-rc. Patch by Sebastian.
12262 - Fix a race condition when freeing keys shared between main thread
12263 and CPU workers that could result in a memory leak. Bugfix on
12264 0.1.0.1-rc. Fixes bug 889.
12266 o Minor bugfixes (hidden services):
12267 - Do not throw away existing introduction points on SIGHUP (bugfix on
12268 0.0.6pre1); also, do not stall hidden services because we're
12269 throwing away introduction points; bugfix on 0.2.1.7-alpha. Spotted
12270 by John Brooks. Patch by Karsten. Fixes bug 874.
12271 - Fix a memory leak when we decline to add a v2 rendezvous
12272 descriptor to the cache because we already had a v0 descriptor
12273 with the same ID. Bugfix on 0.2.0.18-alpha.
12275 o Deprecated and removed features:
12276 - RedirectExits has been removed. It was deprecated since
12278 - Finally remove deprecated "EXTENDED_FORMAT" controller feature. It
12279 has been called EXTENDED_EVENTS since 0.1.2.4-alpha.
12280 - Cell pools are now always enabled; --disable-cell-pools is ignored.
12282 o Code simplifications and refactoring:
12283 - Rename the confusing or_is_obsolete field to the more appropriate
12284 is_bad_for_new_circs, and move it to or_connection_t where it
12286 - Move edge-only flags from connection_t to edge_connection_t: not
12287 only is this better coding, but on machines of plausible alignment,
12288 it should save 4-8 bytes per connection_t. "Every little bit helps."
12289 - Rename ServerDNSAllowBrokenResolvConf to ServerDNSAllowBrokenConfig
12290 for consistency; keep old option working for backward compatibility.
12291 - Simplify the code for finding connections to use for a circuit.
12294 Changes in version 0.2.1.8-alpha - 2008-12-08
12295 Tor 0.2.1.8-alpha fixes some crash bugs in earlier alpha releases,
12296 builds better on unusual platforms like Solaris and old OS X, and
12297 fixes a variety of other issues.
12300 - New DirPortFrontPage option that takes an html file and publishes
12301 it as "/" on the DirPort. Now relay operators can provide a
12302 disclaimer without needing to set up a separate webserver. There's
12303 a sample disclaimer in contrib/tor-exit-notice.html.
12306 - When the client is choosing entry guards, now it selects at most
12307 one guard from a given relay family. Otherwise we could end up with
12308 all of our entry points into the network run by the same operator.
12309 Suggested by Camilo Viecco. Fix on 0.1.1.11-alpha.
12312 - Fix a DOS opportunity during the voting signature collection process
12313 at directory authorities. Spotted by rovv. Bugfix on 0.2.0.x.
12314 - Fix a possible segfault when establishing an exit connection. Bugfix
12318 - Get file locking working on win32. Bugfix on 0.2.1.6-alpha. Fixes
12320 - Made Tor a little less aggressive about deleting expired
12321 certificates. Partial fix for bug 854.
12322 - Stop doing unaligned memory access that generated bus errors on
12323 sparc64. Bugfix on 0.2.0.10-alpha. Fix for bug 862.
12324 - Fix a crash bug when changing EntryNodes from the controller. Bugfix
12325 on 0.2.1.6-alpha. Fix for bug 867. Patched by Sebastian.
12326 - Make USR2 log-level switch take effect immediately. Bugfix on
12328 - If one win32 nameserver fails to get added, continue adding the
12329 rest, and don't automatically fail.
12330 - Use fcntl() for locking when flock() is not available. Should fix
12331 compilation on Solaris. Should fix Bug 873. Bugfix on 0.2.1.6-alpha.
12332 - Do not mark smartlist_bsearch_idx() function as ATTR_PURE. This bug
12333 could make gcc generate non-functional binary search code. Bugfix
12335 - Build correctly on platforms without socklen_t.
12336 - Avoid potential crash on internal error during signature collection.
12337 Fixes bug 864. Patch from rovv.
12338 - Do not use C's stdio library for writing to log files. This will
12339 improve logging performance by a minute amount, and will stop
12340 leaking fds when our disk is full. Fixes bug 861.
12341 - Stop erroneous use of O_APPEND in cases where we did not in fact
12342 want to re-seek to the end of a file before every last write().
12343 - Correct handling of possible malformed authority signing key
12344 certificates with internal signature types. Fixes bug 880. Bugfix
12346 - Fix a hard-to-trigger resource leak when logging credential status.
12350 - Directory mirrors no longer fetch the v1 directory or
12351 running-routers files. They are obsolete, and nobody asks for them
12352 anymore. This is the first step to making v1 authorities obsolete.
12354 o Minor features (controller):
12355 - Return circuit purposes in response to GETINFO circuit-status. Fixes
12359 Changes in version 0.2.0.32 - 2008-11-20
12360 Tor 0.2.0.32 fixes a major security problem in Debian and Ubuntu
12361 packages (and maybe other packages) noticed by Theo de Raadt, fixes
12362 a smaller security flaw that might allow an attacker to access local
12363 services, further improves hidden service performance, and fixes a
12364 variety of other issues.
12367 - The "User" and "Group" config options did not clear the
12368 supplementary group entries for the Tor process. The "User" option
12369 is now more robust, and we now set the groups to the specified
12370 user's primary group. The "Group" option is now ignored. For more
12371 detailed logging on credential switching, set CREDENTIAL_LOG_LEVEL
12372 in common/compat.c to LOG_NOTICE or higher. Patch by Jacob Appelbaum
12373 and Steven Murdoch. Bugfix on 0.0.2pre14. Fixes bug 848 and 857.
12374 - The "ClientDNSRejectInternalAddresses" config option wasn't being
12375 consistently obeyed: if an exit relay refuses a stream because its
12376 exit policy doesn't allow it, we would remember what IP address
12377 the relay said the destination address resolves to, even if it's
12378 an internal IP address. Bugfix on 0.2.0.7-alpha; patch by rovv.
12381 - Fix a DOS opportunity during the voting signature collection process
12382 at directory authorities. Spotted by rovv. Bugfix on 0.2.0.x.
12384 o Major bugfixes (hidden services):
12385 - When fetching v0 and v2 rendezvous service descriptors in parallel,
12386 we were failing the whole hidden service request when the v0
12387 descriptor fetch fails, even if the v2 fetch is still pending and
12388 might succeed. Similarly, if the last v2 fetch fails, we were
12389 failing the whole hidden service request even if a v0 fetch is
12390 still pending. Fixes bug 814. Bugfix on 0.2.0.10-alpha.
12391 - When extending a circuit to a hidden service directory to upload a
12392 rendezvous descriptor using a BEGIN_DIR cell, almost 1/6 of all
12393 requests failed, because the router descriptor has not been
12394 downloaded yet. In these cases, do not attempt to upload the
12395 rendezvous descriptor, but wait until the router descriptor is
12396 downloaded and retry. Likewise, do not attempt to fetch a rendezvous
12397 descriptor from a hidden service directory for which the router
12398 descriptor has not yet been downloaded. Fixes bug 767. Bugfix
12402 - Fix several infrequent memory leaks spotted by Coverity.
12403 - When testing for libevent functions, set the LDFLAGS variable
12404 correctly. Found by Riastradh.
12405 - Avoid a bug where the FastFirstHopPK 0 option would keep Tor from
12406 bootstrapping with tunneled directory connections. Bugfix on
12407 0.1.2.5-alpha. Fixes bug 797. Found by Erwin Lam.
12408 - When asked to connect to A.B.exit:80, if we don't know the IP for A
12409 and we know that server B rejects most-but-not all connections to
12410 port 80, we would previously reject the connection. Now, we assume
12411 the user knows what they were asking for. Fixes bug 752. Bugfix
12412 on 0.0.9rc5. Diagnosed by BarkerJr.
12413 - If we overrun our per-second write limits a little, count this as
12414 having used up our write allocation for the second, and choke
12415 outgoing directory writes. Previously, we had only counted this when
12416 we had met our limits precisely. Fixes bug 824. Patch from by rovv.
12417 Bugfix on 0.2.0.x (??).
12418 - Remove the old v2 directory authority 'lefkada' from the default
12419 list. It has been gone for many months.
12420 - Stop doing unaligned memory access that generated bus errors on
12421 sparc64. Bugfix on 0.2.0.10-alpha. Fixes bug 862.
12422 - Make USR2 log-level switch take effect immediately. Bugfix on
12425 o Minor bugfixes (controller):
12426 - Make DNS resolved events into "CLOSED", not "FAILED". Bugfix on
12427 0.1.2.5-alpha. Fix by Robert Hogan. Resolves bug 807.
12430 Changes in version 0.2.1.7-alpha - 2008-11-08
12431 Tor 0.2.1.7-alpha fixes a major security problem in Debian and Ubuntu
12432 packages (and maybe other packages) noticed by Theo de Raadt, fixes
12433 a smaller security flaw that might allow an attacker to access local
12434 services, adds better defense against DNS poisoning attacks on exit
12435 relays, further improves hidden service performance, and fixes a
12436 variety of other issues.
12439 - The "ClientDNSRejectInternalAddresses" config option wasn't being
12440 consistently obeyed: if an exit relay refuses a stream because its
12441 exit policy doesn't allow it, we would remember what IP address
12442 the relay said the destination address resolves to, even if it's
12443 an internal IP address. Bugfix on 0.2.0.7-alpha; patch by rovv.
12444 - The "User" and "Group" config options did not clear the
12445 supplementary group entries for the Tor process. The "User" option
12446 is now more robust, and we now set the groups to the specified
12447 user's primary group. The "Group" option is now ignored. For more
12448 detailed logging on credential switching, set CREDENTIAL_LOG_LEVEL
12449 in common/compat.c to LOG_NOTICE or higher. Patch by Jacob Appelbaum
12450 and Steven Murdoch. Bugfix on 0.0.2pre14. Fixes bug 848.
12451 - Do not use or believe expired v3 authority certificates. Patch
12452 from Karsten. Bugfix in 0.2.0.x. Fixes bug 851.
12455 - Now NodeFamily and MyFamily config options allow spaces in
12456 identity fingerprints, so it's easier to paste them in.
12457 Suggested by Lucky Green.
12458 - Implement the 0x20 hack to better resist DNS poisoning: set the
12459 case on outgoing DNS requests randomly, and reject responses that do
12460 not match the case correctly. This logic can be disabled with the
12461 ServerDNSRandomizeCase setting, if you are using one of the 0.3%
12462 of servers that do not reliably preserve case in replies. See
12463 "Increased DNS Forgery Resistance through 0x20-Bit Encoding"
12465 - Preserve case in replies to DNSPort requests in order to support
12466 the 0x20 hack for resisting DNS poisoning attacks.
12468 o Hidden service performance improvements:
12469 - When the client launches an introduction circuit, retry with a
12470 new circuit after 30 seconds rather than 60 seconds.
12471 - Launch a second client-side introduction circuit in parallel
12472 after a delay of 15 seconds (based on work by Christian Wilms).
12473 - Hidden services start out building five intro circuits rather
12474 than three, and when the first three finish they publish a service
12475 descriptor using those. Now we publish our service descriptor much
12476 faster after restart.
12479 - Minor fix in the warning messages when you're having problems
12480 bootstrapping; also, be more forgiving of bootstrap problems when
12481 we're still making incremental progress on a given bootstrap phase.
12482 - When we're choosing an exit node for a circuit, and we have
12483 no pending streams, choose a good general exit rather than one that
12484 supports "all the pending streams". Bugfix on 0.1.1.x. Fix by rovv.
12485 - Send a valid END cell back when a client tries to connect to a
12486 nonexistent hidden service port. Bugfix on 0.1.2.15. Fixes bug
12487 840. Patch from rovv.
12488 - If a broken client asks a non-exit router to connect somewhere,
12489 do not even do the DNS lookup before rejecting the connection.
12490 Fixes another case of bug 619. Patch from rovv.
12491 - Fix another case of assuming, when a specific exit is requested,
12492 that we know more than the user about what hosts it allows.
12493 Fixes another case of bug 752. Patch from rovv.
12494 - Check which hops rendezvous stream cells are associated with to
12495 prevent possible guess-the-streamid injection attacks from
12496 intermediate hops. Fixes another case of bug 446. Based on patch
12498 - Avoid using a negative right-shift when comparing 32-bit
12499 addresses. Possible fix for bug 845 and bug 811.
12500 - Make the assert_circuit_ok() function work correctly on circuits that
12501 have already been marked for close.
12502 - Fix read-off-the-end-of-string error in unit tests when decoding
12503 introduction points.
12504 - Fix uninitialized size field for memory area allocation: may improve
12505 memory performance during directory parsing.
12506 - Treat duplicate certificate fetches as failures, so that we do
12507 not try to re-fetch an expired certificate over and over and over.
12508 - Do not say we're fetching a certificate when we'll in fact skip it
12509 because of a pending download.
12512 Changes in version 0.2.1.6-alpha - 2008-09-30
12513 Tor 0.2.1.6-alpha further improves performance and robustness of
12514 hidden services, starts work on supporting per-country relay selection,
12515 and fixes a variety of smaller issues.
12518 - Implement proposal 121: make it possible to build hidden services
12519 that only certain clients are allowed to connect to. This is
12520 enforced at several points, so that unauthorized clients are unable
12521 to send INTRODUCE cells to the service, or even (depending on the
12522 type of authentication) to learn introduction points. This feature
12523 raises the bar for certain kinds of active attacks against hidden
12524 services. Code by Karsten Loesing.
12525 - Relays now store and serve v2 hidden service descriptors by default,
12526 i.e., the new default value for HidServDirectoryV2 is 1. This is
12527 the last step in proposal 114, which aims to make hidden service
12528 lookups more reliable.
12529 - Start work to allow node restrictions to include country codes. The
12530 syntax to exclude nodes in a country with country code XX is
12531 "ExcludeNodes {XX}". Patch from Robert Hogan. It still needs some
12532 refinement to decide what config options should take priority if
12533 you ask to both use a particular node and exclude it.
12534 - Allow ExitNodes list to include IP ranges and country codes, just
12535 like the Exclude*Nodes lists. Patch from Robert Hogan.
12538 - Fix a bug when parsing ports in tor_addr_port_parse() that caused
12539 Tor to fail to start if you had it configured to use a bridge
12540 relay. Fixes bug 809. Bugfix on 0.2.1.5-alpha.
12541 - When extending a circuit to a hidden service directory to upload a
12542 rendezvous descriptor using a BEGIN_DIR cell, almost 1/6 of all
12543 requests failed, because the router descriptor had not been
12544 downloaded yet. In these cases, we now wait until the router
12545 descriptor is downloaded, and then retry. Likewise, clients
12546 now skip over a hidden service directory if they don't yet have
12547 its router descriptor, rather than futilely requesting it and
12548 putting mysterious complaints in the logs. Fixes bug 767. Bugfix
12550 - When fetching v0 and v2 rendezvous service descriptors in parallel,
12551 we were failing the whole hidden service request when the v0
12552 descriptor fetch fails, even if the v2 fetch is still pending and
12553 might succeed. Similarly, if the last v2 fetch fails, we were
12554 failing the whole hidden service request even if a v0 fetch is
12555 still pending. Fixes bug 814. Bugfix on 0.2.0.10-alpha.
12556 - DNS replies need to have names matching their requests, but
12557 these names should be in the questions section, not necessarily
12558 in the answers section. Fixes bug 823. Bugfix on 0.2.1.5-alpha.
12561 - Update to the "September 1 2008" ip-to-country file.
12562 - Allow ports 465 and 587 in the default exit policy again. We had
12563 rejected them in 0.1.0.15, because back in 2005 they were commonly
12564 misconfigured and ended up as spam targets. We hear they are better
12565 locked down these days.
12566 - Use a lockfile to make sure that two Tor processes are not
12567 simultaneously running with the same datadir.
12568 - Serve the latest v3 networkstatus consensus via the control
12569 port. Use "getinfo dir/status-vote/current/consensus" to fetch it.
12570 - Better logging about stability/reliability calculations on directory
12572 - Drop the requirement to have an open dir port for storing and
12573 serving v2 hidden service descriptors.
12574 - Directory authorities now serve a /tor/dbg-stability.txt URL to
12575 help debug WFU and MTBF calculations.
12576 - Implement most of Proposal 152: allow specialized servers to permit
12577 single-hop circuits, and clients to use those servers to build
12578 single-hop circuits when using a specialized controller. Patch
12579 from Josh Albrecht. Resolves feature request 768.
12580 - Add a -p option to tor-resolve for specifying the SOCKS port: some
12581 people find host:port too confusing.
12582 - Make TrackHostExit mappings expire a while after their last use, not
12583 after their creation. Patch from Robert Hogan.
12584 - Provide circuit purposes along with circuit events to the controller.
12587 - Fix compile on OpenBSD 4.4-current. Bugfix on 0.2.1.5-alpha.
12589 - Fixed some memory leaks -- some quite frequent, some almost
12590 impossible to trigger -- based on results from Coverity.
12591 - When testing for libevent functions, set the LDFLAGS variable
12592 correctly. Found by Riastradh.
12593 - Fix an assertion bug in parsing policy-related options; possible fix
12595 - Catch and report a few more bootstrapping failure cases when Tor
12596 fails to establish a TCP connection. Cleanup on 0.2.1.x.
12597 - Avoid a bug where the FastFirstHopPK 0 option would keep Tor from
12598 bootstrapping with tunneled directory connections. Bugfix on
12599 0.1.2.5-alpha. Fixes bug 797. Found by Erwin Lam.
12600 - When asked to connect to A.B.exit:80, if we don't know the IP for A
12601 and we know that server B rejects most-but-not all connections to
12602 port 80, we would previously reject the connection. Now, we assume
12603 the user knows what they were asking for. Fixes bug 752. Bugfix
12604 on 0.0.9rc5. Diagnosed by BarkerJr.
12605 - If we are not using BEGIN_DIR cells, don't attempt to contact hidden
12606 service directories if they have no advertised dir port. Bugfix
12608 - If we overrun our per-second write limits a little, count this as
12609 having used up our write allocation for the second, and choke
12610 outgoing directory writes. Previously, we had only counted this when
12611 we had met our limits precisely. Fixes bug 824. Patch by rovv.
12612 Bugfix on 0.2.0.x (??).
12613 - Avoid a "0 divided by 0" calculation when calculating router uptime
12614 at directory authorities. Bugfix on 0.2.0.8-alpha.
12615 - Make DNS resolved controller events into "CLOSED", not
12616 "FAILED". Bugfix on 0.1.2.5-alpha. Fix by Robert Hogan. Resolves
12618 - Fix a bug where an unreachable relay would establish enough
12619 reachability testing circuits to do a bandwidth test -- if
12620 we already have a connection to the middle hop of the testing
12621 circuit, then it could establish the last hop by using the existing
12622 connection. Bugfix on 0.1.2.2-alpha, exposed when we made testing
12623 circuits no longer use entry guards in 0.2.1.3-alpha.
12624 - If we have correct permissions on $datadir, we complain to stdout
12625 and fail to start. But dangerous permissions on
12626 $datadir/cached-status/ would cause us to open a log and complain
12627 there. Now complain to stdout and fail to start in both cases. Fixes
12628 bug 820, reported by seeess.
12629 - Remove the old v2 directory authority 'lefkada' from the default
12630 list. It has been gone for many months.
12632 o Code simplifications and refactoring:
12633 - Revise the connection_new functions so that a more typesafe variant
12634 exists. This will work better with Coverity, and let us find any
12635 actual mistakes we're making here.
12636 - Refactor unit testing logic so that dmalloc can be used sensibly
12637 with unit tests to check for memory leaks.
12638 - Move all hidden-service related fields from connection and circuit
12639 structure to substructures: this way they won't eat so much memory.
12642 Changes in version 0.2.0.31 - 2008-09-03
12643 Tor 0.2.0.31 addresses two potential anonymity issues, starts to fix
12644 a big bug we're seeing where in rare cases traffic from one Tor stream
12645 gets mixed into another stream, and fixes a variety of smaller issues.
12648 - Make sure that two circuits can never exist on the same connection
12649 with the same circuit ID, even if one is marked for close. This
12650 is conceivably a bugfix for bug 779. Bugfix on 0.1.0.4-rc.
12651 - Relays now reject risky extend cells: if the extend cell includes
12652 a digest of all zeroes, or asks to extend back to the relay that
12653 sent the extend cell, tear down the circuit. Ideas suggested
12655 - If not enough of our entry guards are available so we add a new
12656 one, we might use the new one even if it overlapped with the
12657 current circuit's exit relay (or its family). Anonymity bugfix
12658 pointed out by rovv.
12661 - Recover 3-7 bytes that were wasted per memory chunk. Fixes bug
12662 794; bug spotted by rovv. Bugfix on 0.2.0.1-alpha.
12663 - Correctly detect the presence of the linux/netfilter_ipv4.h header
12664 when building against recent kernels. Bugfix on 0.1.2.1-alpha.
12665 - Pick size of default geoip filename string correctly on windows.
12666 Fixes bug 806. Bugfix on 0.2.0.30.
12667 - Make the autoconf script accept the obsolete --with-ssl-dir
12668 option as an alias for the actually-working --with-openssl-dir
12669 option. Fix the help documentation to recommend --with-openssl-dir.
12670 Based on a patch by "Dave". Bugfix on 0.2.0.1-alpha.
12671 - When using the TransPort option on OpenBSD, and using the User
12672 option to change UID and drop privileges, make sure to open
12673 /dev/pf before dropping privileges. Fixes bug 782. Patch from
12674 Christopher Davis. Bugfix on 0.1.2.1-alpha.
12675 - Try to attach connections immediately upon receiving a RENDEZVOUS2
12676 or RENDEZVOUS_ESTABLISHED cell. This can save a second or two
12677 on the client side when connecting to a hidden service. Bugfix
12678 on 0.0.6pre1. Found and fixed by Christian Wilms; resolves bug 743.
12679 - When closing an application-side connection because its circuit is
12680 getting torn down, generate the stream event correctly. Bugfix on
12681 0.1.2.x. Anonymous patch.
12684 Changes in version 0.2.1.5-alpha - 2008-08-31
12685 Tor 0.2.1.5-alpha moves us closer to handling IPv6 destinations, puts
12686 in a lot of the infrastructure for adding authorization to hidden
12687 services, lays the groundwork for having clients read their load
12688 balancing information out of the networkstatus consensus rather than
12689 the individual router descriptors, addresses two potential anonymity
12690 issues, and fixes a variety of smaller issues.
12693 - Convert many internal address representations to optionally hold
12695 - Generate and accept IPv6 addresses in many protocol elements.
12696 - Make resolver code handle nameservers located at ipv6 addresses.
12697 - Begin implementation of proposal 121 ("Client authorization for
12698 hidden services"): configure hidden services with client
12699 authorization, publish descriptors for them, and configure
12700 authorization data for hidden services at clients. The next
12701 step is to actually access hidden services that perform client
12703 - More progress toward proposal 141: Network status consensus
12704 documents and votes now contain bandwidth information for each
12705 router and a summary of that router's exit policy. Eventually this
12706 will be used by clients so that they do not have to download every
12707 known descriptor before building circuits.
12709 o Major bugfixes (on 0.2.0.x and before):
12710 - When sending CREATED cells back for a given circuit, use a 64-bit
12711 connection ID to find the right connection, rather than an addr:port
12712 combination. Now that we can have multiple OR connections between
12713 the same ORs, it is no longer possible to use addr:port to uniquely
12714 identify a connection.
12715 - Relays now reject risky extend cells: if the extend cell includes
12716 a digest of all zeroes, or asks to extend back to the relay that
12717 sent the extend cell, tear down the circuit. Ideas suggested
12719 - If not enough of our entry guards are available so we add a new
12720 one, we might use the new one even if it overlapped with the
12721 current circuit's exit relay (or its family). Anonymity bugfix
12722 pointed out by rovv.
12725 - Recover 3-7 bytes that were wasted per memory chunk. Fixes bug
12726 794; bug spotted by rovv. Bugfix on 0.2.0.1-alpha.
12727 - When using the TransPort option on OpenBSD, and using the User
12728 option to change UID and drop privileges, make sure to open /dev/pf
12729 before dropping privileges. Fixes bug 782. Patch from Christopher
12730 Davis. Bugfix on 0.1.2.1-alpha.
12731 - Correctly detect the presence of the linux/netfilter_ipv4.h header
12732 when building against recent kernels. Bugfix on 0.1.2.1-alpha.
12733 - Add a missing safe_str() call for a debug log message.
12734 - Use 64 bits instead of 32 bits for connection identifiers used with
12735 the controller protocol, to greatly reduce risk of identifier reuse.
12736 - Make the autoconf script accept the obsolete --with-ssl-dir
12737 option as an alias for the actually-working --with-openssl-dir
12738 option. Fix the help documentation to recommend --with-openssl-dir.
12739 Based on a patch by "Dave". Bugfix on 0.2.0.1-alpha.
12742 - Rate-limit too-many-sockets messages: when they happen, they happen
12743 a lot. Resolves bug 748.
12744 - Resist DNS poisoning a little better by making sure that names in
12745 answer sections match.
12746 - Print the SOCKS5 error message string as well as the error code
12747 when a tor-resolve request fails. Patch from Jacob.
12750 Changes in version 0.2.1.4-alpha - 2008-08-04
12751 Tor 0.2.1.4-alpha fixes a pair of crash bugs in 0.2.1.3-alpha.
12754 - The address part of exit policies was not correctly written
12755 to router descriptors. This generated router descriptors that failed
12756 their self-checks. Noticed by phobos, fixed by Karsten. Bugfix
12758 - Tor triggered a false assert when extending a circuit to a relay
12759 but we already have a connection open to that relay. Noticed by
12760 phobos, fixed by Karsten. Bugfix on 0.2.1.3-alpha.
12763 - Fix a hidden service logging bug: in some edge cases, the router
12764 descriptor of a previously picked introduction point becomes
12765 obsolete and we need to give up on it rather than continually
12766 complaining that it has become obsolete. Observed by xiando. Bugfix
12769 o Removed features:
12770 - Take out the TestVia config option, since it was a workaround for
12771 a bug that was fixed in Tor 0.1.1.21.
12774 Changes in version 0.2.1.3-alpha - 2008-08-03
12775 Tor 0.2.1.3-alpha implements most of the pieces to prevent
12776 infinite-length circuit attacks (see proposal 110); fixes a bug that
12777 might cause exit relays to corrupt streams they send back; allows
12778 address patterns (e.g. 255.128.0.0/16) to appear in ExcludeNodes and
12779 ExcludeExitNodes config options; and fixes a big pile of bugs.
12781 o Bootstrapping bugfixes (on 0.2.1.x-alpha):
12782 - Send a bootstrap problem "warn" event on the first problem if the
12783 reason is NO_ROUTE (that is, our network is down).
12786 - Implement most of proposal 110: The first K cells to be sent
12787 along a circuit are marked as special "early" cells; only K "early"
12788 cells will be allowed. Once this code is universal, we can block
12789 certain kinds of DOS attack by requiring that EXTEND commands must
12790 be sent using an "early" cell.
12793 - Try to attach connections immediately upon receiving a RENDEZVOUS2
12794 or RENDEZVOUS_ESTABLISHED cell. This can save a second or two
12795 on the client side when connecting to a hidden service. Bugfix
12796 on 0.0.6pre1. Found and fixed by Christian Wilms; resolves bug 743.
12797 - Ensure that two circuits can never exist on the same connection
12798 with the same circuit ID, even if one is marked for close. This
12799 is conceivably a bugfix for bug 779; fixes a bug on 0.1.0.4-rc.
12802 - When relays do their initial bandwidth measurement, don't limit
12803 to just our entry guards for the test circuits. Otherwise we tend
12804 to have multiple test circuits going through a single entry guard,
12805 which makes our bandwidth test less accurate. Fixes part of bug 654;
12806 patch contributed by Josh Albrecht.
12807 - Add an ExcludeExitNodes option so users can list a set of nodes
12808 that should be be excluded from the exit node position, but
12809 allowed elsewhere. Implements proposal 151.
12810 - Allow address patterns (e.g., 255.128.0.0/16) to appear in
12811 ExcludeNodes and ExcludeExitNodes lists.
12812 - Change the implementation of ExcludeNodes and ExcludeExitNodes to
12813 be more efficient. Formerly it was quadratic in the number of
12814 servers; now it should be linear. Fixes bug 509.
12815 - Save 16-22 bytes per open circuit by moving the n_addr, n_port,
12816 and n_conn_id_digest fields into a separate structure that's
12817 only needed when the circuit has not yet attached to an n_conn.
12820 - Change the contrib/tor.logrotate script so it makes the new
12821 logs as "_tor:_tor" rather than the default, which is generally
12822 "root:wheel". Fixes bug 676, reported by Serge Koksharov.
12823 - Stop using __attribute__((nonnull)) with GCC: it can give us useful
12824 warnings (occasionally), but it can also cause the compiler to
12825 eliminate error-checking code. Suggested by Peter Gutmann.
12826 - When a hidden service is giving up on an introduction point candidate
12827 that was not included in the last published rendezvous descriptor,
12828 don't reschedule publication of the next descriptor. Fixes bug 763.
12830 - Mark RendNodes, RendExcludeNodes, HiddenServiceNodes, and
12831 HiddenServiceExcludeNodes as obsolete: they never worked properly,
12832 and nobody claims to be using them. Fixes bug 754. Bugfix on
12833 0.1.0.1-rc. Patch from Christian Wilms.
12834 - Fix a small alignment and memory-wasting bug on buffer chunks.
12837 o Minor bugfixes (controller):
12838 - When closing an application-side connection because its circuit
12839 is getting torn down, generate the stream event correctly.
12840 Bugfix on 0.1.2.x. Anonymous patch.
12842 o Removed features:
12843 - Remove all backward-compatibility code to support relays running
12844 versions of Tor so old that they no longer work at all on the
12848 Changes in version 0.2.0.30 - 2008-07-15
12850 - Stop using __attribute__((nonnull)) with GCC: it can give us useful
12851 warnings (occasionally), but it can also cause the compiler to
12852 eliminate error-checking code. Suggested by Peter Gutmann.
12855 Changes in version 0.2.0.29-rc - 2008-07-08
12856 Tor 0.2.0.29-rc fixes two big bugs with using bridges, fixes more
12857 hidden-service performance bugs, and fixes a bunch of smaller bugs.
12860 - If you have more than one bridge but don't know their keys,
12861 you would only launch a request for the descriptor of the first one
12862 on your list. (Tor considered launching requests for the others, but
12863 found that it already had a connection on the way for $0000...0000
12864 so it didn't open another.) Bugfix on 0.2.0.x.
12865 - If you have more than one bridge but don't know their keys, and the
12866 connection to one of the bridges failed, you would cancel all
12867 pending bridge connections. (After all, they all have the same
12868 digest.) Bugfix on 0.2.0.x.
12869 - When a hidden service was trying to establish an introduction point,
12870 and Tor had built circuits preemptively for such purposes, we
12871 were ignoring all the preemptive circuits and launching a new one
12872 instead. Bugfix on 0.2.0.14-alpha.
12873 - When a hidden service was trying to establish an introduction point,
12874 and Tor *did* manage to reuse one of the preemptively built
12875 circuits, it didn't correctly remember which one it used,
12876 so it asked for another one soon after, until there were no
12877 more preemptive circuits, at which point it launched one from
12878 scratch. Bugfix on 0.0.9.x.
12879 - Make directory servers include the X-Your-Address-Is: http header in
12880 their responses even for begin_dir conns. Now clients who only
12881 ever use begin_dir connections still have a way to learn their IP
12882 address. Fixes bug 737; bugfix on 0.2.0.22-rc. Reported by goldy.
12885 - Fix a macro/CPP interaction that was confusing some compilers:
12886 some GCCs don't like #if/#endif pairs inside macro arguments.
12888 - Fix macro collision between OpenSSL 0.9.8h and Windows headers.
12889 Fixes bug 704; fix from Steven Murdoch.
12890 - When opening /dev/null in finish_daemonize(), do not pass the
12891 O_CREAT flag. Fortify was complaining, and correctly so. Fixes
12892 bug 742; fix from Michael Scherer. Bugfix on 0.0.2pre19.
12893 - Correctly detect transparent proxy support on Linux hosts that
12894 require in.h to be included before netfilter_ipv4.h. Patch
12896 - Disallow session resumption attempts during the renegotiation
12897 stage of the v2 handshake protocol. Clients should never be trying
12898 session resumption at this point, but apparently some did, in
12899 ways that caused the handshake to fail. Bugfix on 0.2.0.20-rc. Bug
12900 found by Geoff Goodell.
12903 Changes in version 0.2.1.2-alpha - 2008-06-20
12904 Tor 0.2.1.2-alpha includes a new "TestingTorNetwork" config option to
12905 make it easier to set up your own private Tor network; fixes several
12906 big bugs with using more than one bridge relay; fixes a big bug with
12907 offering hidden services quickly after Tor starts; and uses a better
12908 API for reporting potential bootstrapping problems to the controller.
12911 - New TestingTorNetwork config option to allow adjustment of
12912 previously constant values that, while reasonable, could slow
12913 bootstrapping. Implements proposal 135. Patch from Karsten.
12916 - If you have more than one bridge but don't know their digests,
12917 you would only learn a request for the descriptor of the first one
12918 on your list. (Tor considered launching requests for the others, but
12919 found that it already had a connection on the way for $0000...0000
12920 so it didn't open another.) Bugfix on 0.2.0.x.
12921 - If you have more than one bridge but don't know their digests,
12922 and the connection to one of the bridges failed, you would cancel
12923 all pending bridge connections. (After all, they all have the
12924 same digest.) Bugfix on 0.2.0.x.
12925 - When establishing a hidden service, introduction points that
12926 originate from cannibalized circuits are completely ignored and not
12927 included in rendezvous service descriptors. This might be another
12928 reason for delay in making a hidden service available. Bugfix
12929 from long ago (0.0.9.x?)
12932 - Allow OpenSSL to use dynamic locks if it wants.
12933 - When building a consensus, do not include routers that are down.
12934 This will cut down 30% to 40% on consensus size. Implements
12936 - In directory authorities' approved-routers files, allow
12937 fingerprints with or without space.
12938 - Add a "GETINFO /status/bootstrap-phase" controller option, so the
12939 controller can query our current bootstrap state in case it attaches
12940 partway through and wants to catch up.
12941 - Send an initial "Starting" bootstrap status event, so we have a
12942 state to start out in.
12945 - Asking for a conditional consensus at .../consensus/<fingerprints>
12946 would crash a dirserver if it did not already have a
12947 consensus. Bugfix on 0.2.1.1-alpha.
12948 - Clean up some macro/CPP interactions: some GCC versions don't like
12949 #if/#endif pairs inside macro arguments. Fixes bug 707. Bugfix on
12952 o Bootstrapping bugfixes (on 0.2.1.1-alpha):
12953 - Directory authorities shouldn't complain about bootstrapping
12954 problems just because they do a lot of reachability testing and
12955 some of the connection attempts fail.
12956 - Start sending "count" and "recommendation" key/value pairs in
12957 bootstrap problem status events, so the controller can hear about
12958 problems even before Tor decides they're worth reporting for sure.
12959 - If you're using bridges, generate "bootstrap problem" warnings
12960 as soon as you run out of working bridges, rather than waiting
12961 for ten failures -- which will never happen if you have less than
12963 - If we close our OR connection because there's been a circuit
12964 pending on it for too long, we were telling our bootstrap status
12965 events "REASON=NONE". Now tell them "REASON=TIMEOUT".
12968 Changes in version 0.2.1.1-alpha - 2008-06-13
12969 Tor 0.2.1.1-alpha fixes a lot of memory fragmentation problems that
12970 were making the Tor process bloat especially on Linux; makes our TLS
12971 handshake blend in better; sends "bootstrap phase" status events to
12972 the controller, so it can keep the user informed of progress (and
12973 problems) fetching directory information and establishing circuits;
12974 and adds a variety of smaller features.
12977 - More work on making our TLS handshake blend in: modify the list
12978 of ciphers advertised by OpenSSL in client mode to even more
12979 closely resemble a common web browser. We cheat a little so that
12980 we can advertise ciphers that the locally installed OpenSSL doesn't
12982 - Start sending "bootstrap phase" status events to the controller,
12983 so it can keep the user informed of progress fetching directory
12984 information and establishing circuits. Also inform the controller
12985 if we think we're stuck at a particular bootstrap phase. Implements
12987 - Resume using OpenSSL's RAND_poll() for better (and more portable)
12988 cross-platform entropy collection again. We used to use it, then
12989 stopped using it because of a bug that could crash systems that
12990 called RAND_poll when they had a lot of fds open. It looks like the
12991 bug got fixed in late 2006. Our new behavior is to call RAND_poll()
12992 at startup, and to call RAND_poll() when we reseed later only if
12993 we have a non-buggy OpenSSL version.
12996 - When we choose to abandon a new entry guard because we think our
12997 older ones might be better, close any circuits pending on that
12998 new entry guard connection. This fix should make us recover much
12999 faster when our network is down and then comes back. Bugfix on
13000 0.1.2.8-beta; found by lodger.
13002 o Memory fixes and improvements:
13003 - Add a malloc_good_size implementation to OpenBSD_malloc_linux.c,
13004 to avoid unused RAM in buffer chunks and memory pools.
13005 - Speed up parsing and cut down on memory fragmentation by using
13006 stack-style allocations for parsing directory objects. Previously,
13007 this accounted for over 40% of allocations from within Tor's code
13008 on a typical directory cache.
13009 - Use a Bloom filter rather than a digest-based set to track which
13010 descriptors we need to keep around when we're cleaning out old
13011 router descriptors. This speeds up the computation significantly,
13012 and may reduce fragmentation.
13013 - Reduce the default smartlist size from 32 to 16; it turns out that
13014 most smartlists hold around 8-12 elements tops.
13015 - Make dumpstats() log the fullness and size of openssl-internal
13017 - If the user has applied the experimental SSL_MODE_RELEASE_BUFFERS
13018 patch to their OpenSSL, turn it on to save memory on servers. This
13019 patch will (with any luck) get included in a mainline distribution
13021 - Never use OpenSSL compression: it wastes RAM and CPU trying to
13022 compress cells, which are basically all encrypted, compressed,
13026 - Stop reloading the router list from disk for no reason when we
13027 run out of reachable directory mirrors. Once upon a time reloading
13028 it would set the 'is_running' flag back to 1 for them. It hasn't
13029 done that for a long time.
13030 - In very rare situations new hidden service descriptors were
13031 published earlier than 30 seconds after the last change to the
13032 service. (We currently think that a hidden service descriptor
13033 that's been stable for 30 seconds is worth publishing.)
13036 - Allow separate log levels to be configured for different logging
13037 domains. For example, this allows one to log all notices, warnings,
13038 or errors, plus all memory management messages of level debug or
13039 higher, with: Log [MM] debug-err [*] notice-err file /var/log/tor.
13040 - Add a couple of extra warnings to --enable-gcc-warnings for GCC 4.3,
13041 and stop using a warning that had become unfixably verbose under
13043 - New --hush command-line option similar to --quiet. While --quiet
13044 disables all logging to the console on startup, --hush limits the
13045 output to messages of warning and error severity.
13046 - Servers support a new URL scheme for consensus downloads that
13047 allows the client to specify which authorities are trusted.
13048 The server then only sends the consensus if the client will trust
13049 it. Otherwise a 404 error is sent back. Clients use this
13050 new scheme when the server supports it (meaning it's running
13051 0.2.1.1-alpha or later). Implements proposal 134.
13052 - New configure/torrc options (--enable-geoip-stats,
13053 DirRecordUsageByCountry) to record how many IPs we've served
13054 directory info to in each country code, how many status documents
13055 total we've sent to each country code, and what share of the total
13056 directory requests we should expect to see.
13057 - Use the TLS1 hostname extension to more closely resemble browser
13059 - Lots of new unit tests.
13060 - Add a macro to implement the common pattern of iterating through
13061 two parallel lists in lockstep.
13064 Changes in version 0.2.0.28-rc - 2008-06-13
13065 Tor 0.2.0.28-rc fixes an anonymity-related bug, fixes a hidden-service
13066 performance bug, and fixes a bunch of smaller bugs.
13069 - Fix a bug where, when we were choosing the 'end stream reason' to
13070 put in our relay end cell that we send to the exit relay, Tor
13071 clients on Windows were sometimes sending the wrong 'reason'. The
13072 anonymity problem is that exit relays may be able to guess whether
13073 the client is running Windows, thus helping partition the anonymity
13074 set. Down the road we should stop sending reasons to exit relays,
13075 or otherwise prevent future versions of this bug.
13078 - While setting up a hidden service, some valid introduction circuits
13079 were overlooked and abandoned. This might be the reason for
13080 the long delay in making a hidden service available. Bugfix on
13084 - Update to the "June 9 2008" ip-to-country file.
13085 - Run 'make test' as part of 'make dist', so we stop releasing so
13086 many development snapshots that fail their unit tests.
13089 - When we're checking if we have enough dir info for each relay
13090 to begin establishing circuits, make sure that we actually have
13091 the descriptor listed in the consensus, not just any descriptor.
13093 - Bridge relays no longer print "xx=0" in their extrainfo document
13094 for every single country code in the geoip db. Bugfix on
13096 - Only warn when we fail to load the geoip file if we were planning to
13097 include geoip stats in our extrainfo document. Bugfix on 0.2.0.27-rc.
13098 - If we change our MaxAdvertisedBandwidth and then reload torrc,
13099 Tor won't realize it should publish a new relay descriptor. Fixes
13100 bug 688, reported by mfr. Bugfix on 0.1.2.x.
13101 - When we haven't had any application requests lately, don't bother
13102 logging that we have expired a bunch of descriptors. Bugfix
13104 - Make relay cells written on a connection count as non-padding when
13105 tracking how long a connection has been in use. Bugfix on
13106 0.2.0.1-alpha. Spotted by lodger.
13107 - Fix unit tests in 0.2.0.27-rc.
13108 - Fix compile on Windows.
13111 Changes in version 0.2.0.27-rc - 2008-06-03
13112 Tor 0.2.0.27-rc adds a few features we left out of the earlier
13113 release candidates. In particular, we now include an IP-to-country
13114 GeoIP database, so controllers can easily look up what country a
13115 given relay is in, and so bridge relays can give us some sanitized
13116 summaries about which countries are making use of bridges. (See proposal
13117 126-geoip-fetching.txt for details.)
13120 - Include an IP-to-country GeoIP file in the tarball, so bridge
13121 relays can report sanitized summaries of the usage they're seeing.
13124 - Add a "PURPOSE=" argument to "STREAM NEW" events, as suggested by
13125 Robert Hogan. Fixes the first part of bug 681.
13126 - Make bridge authorities never serve extrainfo docs.
13127 - Add support to detect Libevent versions in the 1.4.x series
13129 - Fix build on gcc 4.3 with --enable-gcc-warnings set.
13130 - Include a new contrib/tor-exit-notice.html file that exit relay
13131 operators can put on their website to help reduce abuse queries.
13134 - When tunneling an encrypted directory connection, and its first
13135 circuit fails, do not leave it unattached and ask the controller
13136 to deal. Fixes the second part of bug 681.
13137 - Make bridge authorities correctly expire old extrainfo documents
13141 Changes in version 0.2.0.26-rc - 2008-05-13
13142 Tor 0.2.0.26-rc fixes a major security vulnerability caused by a bug
13143 in Debian's OpenSSL packages. All users running any 0.2.0.x version
13144 should upgrade, whether they're running Debian or not.
13146 o Major security fixes:
13147 - Use new V3 directory authority keys on the tor26, gabelmoo, and
13148 moria1 V3 directory authorities. The old keys were generated with
13149 a vulnerable version of Debian's OpenSSL package, and must be
13150 considered compromised. Other authorities' keys were not generated
13151 with an affected version of OpenSSL.
13154 - List authority signatures as "unrecognized" based on DirServer
13155 lines, not on cert cache. Bugfix on 0.2.0.x.
13158 - Add a new V3AuthUseLegacyKey option to make it easier for
13159 authorities to change their identity keys if they have to.
13162 Changes in version 0.2.0.25-rc - 2008-04-23
13163 Tor 0.2.0.25-rc makes Tor work again on OS X and certain BSDs.
13166 - Remember to initialize threading before initializing logging.
13167 Otherwise, many BSD-family implementations will crash hard on
13168 startup. Fixes bug 671. Bugfix on 0.2.0.24-rc.
13171 - Authorities correctly free policies on bad servers on
13172 exit. Fixes bug 672. Bugfix on 0.2.0.x.
13175 Changes in version 0.2.0.24-rc - 2008-04-22
13176 Tor 0.2.0.24-rc adds dizum (run by Alex de Joode) as the new sixth
13177 v3 directory authority, makes relays with dynamic IP addresses and no
13178 DirPort notice more quickly when their IP address changes, fixes a few
13179 rare crashes and memory leaks, and fixes a few other miscellaneous bugs.
13181 o New directory authorities:
13182 - Take lefkada out of the list of v3 directory authorities, since
13183 it has been down for months.
13184 - Set up dizum (run by Alex de Joode) as the new sixth v3 directory
13188 - Detect address changes more quickly on non-directory mirror
13189 relays. Bugfix on 0.2.0.18-alpha; fixes bug 652.
13191 o Minor features (security):
13192 - Reject requests for reverse-dns lookup of names that are in
13193 a private address space. Patch from lodger.
13194 - Non-exit relays no longer allow DNS requests. Fixes bug 619. Patch
13197 o Minor bugfixes (crashes):
13198 - Avoid a rare assert that can trigger when Tor doesn't have much
13199 directory information yet and it tries to fetch a v2 hidden
13200 service descriptor. Fixes bug 651, reported by nwf.
13201 - Initialize log mutex before initializing dmalloc. Otherwise,
13202 running with dmalloc would crash. Bugfix on 0.2.0.x-alpha.
13203 - Use recursive pthread mutexes in order to avoid deadlock when
13204 logging debug-level messages to a controller. Bug spotted by nwf,
13205 bugfix on 0.2.0.16-alpha.
13207 o Minor bugfixes (resource management):
13208 - Keep address policies from leaking memory: start their refcount
13209 at 1, not 2. Bugfix on 0.2.0.16-alpha.
13210 - Free authority certificates on exit, so they don't look like memory
13211 leaks. Bugfix on 0.2.0.19-alpha.
13212 - Free static hashtables for policy maps and for TLS connections on
13213 shutdown, so they don't look like memory leaks. Bugfix on 0.2.0.x.
13214 - Avoid allocating extra space when computing consensuses on 64-bit
13215 platforms. Bug spotted by aakova.
13217 o Minor bugfixes (misc):
13218 - Do not read the configuration file when we've only been told to
13219 generate a password hash. Fixes bug 643. Bugfix on 0.0.9pre5. Fix
13220 based on patch from Sebastian Hahn.
13221 - Exit relays that are used as a client can now reach themselves
13222 using the .exit notation, rather than just launching an infinite
13223 pile of circuits. Fixes bug 641. Reported by Sebastian Hahn.
13224 - When attempting to open a logfile fails, tell us why.
13225 - Fix a dumb bug that was preventing us from knowing that we should
13226 preemptively build circuits to handle expected directory requests.
13227 Fixes bug 660. Bugfix on 0.1.2.x.
13228 - Warn less verbosely about clock skew from netinfo cells from
13229 untrusted sources. Fixes bug 663.
13230 - Make controller stream events for DNS requests more consistent,
13231 by adding "new stream" events for DNS requests, and removing
13232 spurious "stream closed" events" for cached reverse resolves.
13233 Patch from mwenge. Fixes bug 646.
13234 - Correctly notify one-hop connections when a circuit build has
13235 failed. Possible fix for bug 669. Found by lodger.
13238 Changes in version 0.2.0.23-rc - 2008-03-24
13239 Tor 0.2.0.23-rc is the fourth release candidate for the 0.2.0 series. It
13240 makes bootstrapping faster if the first directory mirror you contact
13241 is down. The bundles also include the new Vidalia 0.1.2 release.
13244 - When a tunneled directory request is made to a directory server
13245 that's down, notice after 30 seconds rather than 120 seconds. Also,
13246 fail any begindir streams that are pending on it, so they can
13247 retry elsewhere. This was causing multi-minute delays on bootstrap.
13250 Changes in version 0.2.0.22-rc - 2008-03-18
13251 Tor 0.2.0.22-rc is the third release candidate for the 0.2.0 series. It
13252 enables encrypted directory connections by default for non-relays, fixes
13253 some broken TLS behavior we added in 0.2.0.20-rc, and resolves many
13254 other bugs. The bundles also include Vidalia 0.1.1 and Torbutton 1.1.17.
13257 - Enable encrypted directory connections by default for non-relays,
13258 so censor tools that block Tor directory connections based on their
13259 plaintext patterns will no longer work. This means Tor works in
13260 certain censored countries by default again.
13263 - Make sure servers always request certificates from clients during
13264 TLS renegotiation. Reported by lodger; bugfix on 0.2.0.20-rc.
13265 - Do not enter a CPU-eating loop when a connection is closed in
13266 the middle of client-side TLS renegotiation. Fixes bug 622. Bug
13267 diagnosed by lodger; bugfix on 0.2.0.20-rc.
13268 - Fix assertion failure that could occur when a blocked circuit
13269 became unblocked, and it had pending client DNS requests. Bugfix
13270 on 0.2.0.1-alpha. Fixes bug 632.
13272 o Minor bugfixes (on 0.1.2.x):
13273 - Generate "STATUS_SERVER" events rather than misspelled
13274 "STATUS_SEVER" events. Caught by mwenge.
13275 - When counting the number of bytes written on a TLS connection,
13276 look at the BIO actually used for writing to the network, not
13277 at the BIO used (sometimes) to buffer data for the network.
13278 Looking at different BIOs could result in write counts on the
13279 order of ULONG_MAX. Fixes bug 614.
13280 - On Windows, correctly detect errors when listing the contents of
13281 a directory. Fix from lodger.
13283 o Minor bugfixes (on 0.2.0.x):
13284 - Downgrade "sslv3 alert handshake failure" message to INFO.
13285 - If we set RelayBandwidthRate and RelayBandwidthBurst very high but
13286 left BandwidthRate and BandwidthBurst at the default, we would be
13287 silently limited by those defaults. Now raise them to match the
13288 RelayBandwidth* values.
13289 - Fix the SVK version detection logic to work correctly on a branch.
13290 - Make --enable-openbsd-malloc work correctly on Linux with alpha
13291 CPUs. Fixes bug 625.
13292 - Logging functions now check that the passed severity is sane.
13293 - Use proper log levels in the testsuite call of
13294 get_interface_address6().
13295 - When using a nonstandard malloc, do not use the platform values for
13296 HAVE_MALLOC_GOOD_SIZE or HAVE_MALLOC_USABLE_SIZE.
13297 - Make the openbsd malloc code use 8k pages on alpha CPUs and
13299 - Detect mismatched page sizes when using --enable-openbsd-malloc.
13300 - Avoid double-marked-for-close warning when certain kinds of invalid
13301 .in-addr.arpa addresses are passed to the DNSPort. Part of a fix
13302 for bug 617. Bugfix on 0.2.0.1-alpha.
13303 - Make sure that the "NULL-means-reject *:*" convention is followed by
13304 all the policy manipulation functions, avoiding some possible crash
13305 bugs. Bug found by lodger. Bugfix on 0.2.0.16-alpha.
13306 - Fix the implementation of ClientDNSRejectInternalAddresses so that it
13307 actually works, and doesn't warn about every single reverse lookup.
13308 Fixes the other part of bug 617. Bugfix on 0.2.0.1-alpha.
13311 - Only log guard node status when guard node status has changed.
13312 - Downgrade the 3 most common "INFO" messages to "DEBUG". This will
13313 make "INFO" 75% less verbose.
13316 Changes in version 0.2.0.21-rc - 2008-03-02
13317 Tor 0.2.0.21-rc is the second release candidate for the 0.2.0 series. It
13318 makes Tor work well with Vidalia again, fixes a rare assert bug,
13319 and fixes a pair of more minor bugs. The bundles also include Vidalia
13320 0.1.0 and Torbutton 1.1.16.
13323 - The control port should declare that it requires password auth
13324 when HashedControlSessionPassword is set too. Patch from Matt Edman;
13325 bugfix on 0.2.0.20-rc. Fixes bug 615.
13326 - Downgrade assert in connection_buckets_decrement() to a log message.
13327 This may help us solve bug 614, and in any case will make its
13328 symptoms less severe. Bugfix on 0.2.0.20-rc. Reported by fredzupy.
13329 - We were sometimes miscounting the number of bytes read from the
13330 network, causing our rate limiting to not be followed exactly.
13331 Bugfix on 0.2.0.16-alpha. Reported by lodger.
13334 - Fix compilation with OpenSSL 0.9.8 and 0.9.8a. All other supported
13335 OpenSSL versions should have been working fine. Diagnosis and patch
13336 from lodger, Karsten Loesing, and Sebastian Hahn. Fixes bug 616.
13337 Bugfix on 0.2.0.20-rc.
13340 Changes in version 0.2.0.20-rc - 2008-02-24
13341 Tor 0.2.0.20-rc is the first release candidate for the 0.2.0 series. It
13342 makes more progress towards normalizing Tor's TLS handshake, makes
13343 hidden services work better again, helps relays bootstrap if they don't
13344 know their IP address, adds optional support for linking in openbsd's
13345 allocator or tcmalloc, allows really fast relays to scale past 15000
13346 sockets, and fixes a bunch of minor bugs reported by Veracode.
13349 - Enable the revised TLS handshake based on the one designed by
13350 Steven Murdoch in proposal 124, as revised in proposal 130. It
13351 includes version negotiation for OR connections as described in
13352 proposal 105. The new handshake is meant to be harder for censors
13353 to fingerprint, and it adds the ability to detect certain kinds of
13354 man-in-the-middle traffic analysis attacks. The version negotiation
13355 feature will allow us to improve Tor's link protocol more safely
13357 - Choose which bridge to use proportional to its advertised bandwidth,
13358 rather than uniformly at random. This should speed up Tor for
13359 bridge users. Also do this for people who set StrictEntryNodes.
13360 - When a TrackHostExits-chosen exit fails too many times in a row,
13361 stop using it. Bugfix on 0.1.2.x; fixes bug 437.
13364 - Resolved problems with (re-)fetching hidden service descriptors.
13365 Patch from Karsten Loesing; fixes problems with 0.2.0.18-alpha
13366 and 0.2.0.19-alpha.
13367 - If we only ever used Tor for hidden service lookups or posts, we
13368 would stop building circuits and start refusing connections after
13369 24 hours, since we falsely believed that Tor was dormant. Reported
13370 by nwf; bugfix on 0.1.2.x.
13371 - Servers that don't know their own IP address should go to the
13372 authorities for their first directory fetch, even if their DirPort
13373 is off or if they don't know they're reachable yet. This will help
13374 them bootstrap better. Bugfix on 0.2.0.18-alpha; fixes bug 609.
13375 - When counting the number of open sockets, count not only the number
13376 of sockets we have received from the socket() call, but also
13377 the number we've gotten from accept() and socketpair(). This bug
13378 made us fail to count all sockets that we were using for incoming
13379 connections. Bugfix on 0.2.0.x.
13380 - Fix code used to find strings within buffers, when those strings
13381 are not in the first chunk of the buffer. Bugfix on 0.2.0.x.
13382 - Fix potential segfault when parsing HTTP headers. Bugfix on 0.2.0.x.
13383 - Add a new __HashedControlSessionPassword option for controllers
13384 to use for one-off session password hashes that shouldn't get
13385 saved to disk by SAVECONF --- Vidalia users were accumulating a
13386 pile of HashedControlPassword lines in their torrc files, one for
13387 each time they had restarted Tor and then clicked Save. Make Tor
13388 automatically convert "HashedControlPassword" to this new option but
13389 only when it's given on the command line. Partial fix for bug 586.
13391 o Minor features (performance):
13392 - Tune parameters for cell pool allocation to minimize amount of
13394 - Add OpenBSD malloc code from phk as an optional malloc
13395 replacement on Linux: some glibc libraries do very poorly
13396 with Tor's memory allocation patterns. Pass
13397 --enable-openbsd-malloc to get the replacement malloc code.
13398 - Add a --with-tcmalloc option to the configure script to link
13399 against tcmalloc (if present). Does not yet search for
13400 non-system include paths.
13401 - Stop imposing an arbitrary maximum on the number of file descriptors
13402 used for busy servers. Bug reported by Olaf Selke; patch from
13405 o Minor features (other):
13406 - When SafeLogging is disabled, log addresses along with all TLS
13408 - When building with --enable-gcc-warnings, check for whether Apple's
13409 warning "-Wshorten-64-to-32" is available.
13410 - Add a --passphrase-fd argument to the tor-gencert command for
13413 o Minor bugfixes (memory leaks and code problems):
13414 - We were leaking a file descriptor if Tor started with a zero-length
13415 cached-descriptors file. Patch by freddy77; bugfix on 0.1.2.
13416 - Detect size overflow in zlib code. Reported by Justin Ferguson and
13418 - We were comparing the raw BridgePassword entry with a base64'ed
13419 version of it, when handling a "/tor/networkstatus-bridges"
13420 directory request. Now compare correctly. Noticed by Veracode.
13421 - Recover from bad tracked-since value in MTBF-history file.
13422 Should fix bug 537.
13423 - Alter the code that tries to recover from unhandled write
13424 errors, to not try to flush onto a socket that's given us
13425 unhandled errors. Bugfix on 0.1.2.x.
13426 - Make Unix controlsockets work correctly on OpenBSD. Patch from
13427 tup. Bugfix on 0.2.0.3-alpha.
13429 o Minor bugfixes (other):
13430 - If we have an extra-info document for our server, always make
13431 it available on the control port, even if we haven't gotten
13432 a copy of it from an authority yet. Patch from mwenge.
13433 - Log the correct memory chunk sizes for empty RAM chunks in mempool.c.
13434 - Directory mirrors no longer include a guess at the client's IP
13435 address if the connection appears to be coming from the same /24
13436 network; it was producing too many wrong guesses.
13437 - Make the new hidden service code respect the SafeLogging setting.
13438 Bugfix on 0.2.0.x. Patch from Karsten.
13439 - When starting as an authority, do not overwrite all certificates
13440 cached from other authorities. Bugfix on 0.2.0.x. Fixes bug 606.
13441 - If we're trying to flush the last bytes on a connection (for
13442 example, when answering a directory request), reset the
13443 time-to-give-up timeout every time we manage to write something
13444 on the socket. Bugfix on 0.1.2.x.
13445 - Change the behavior of "getinfo status/good-server-descriptor"
13446 so it doesn't return failure when any authority disappears.
13447 - Even though the man page said that "TrackHostExits ." should
13448 work, nobody had ever implemented it. Bugfix on 0.1.0.x.
13449 - Report TLS "zero return" case as a "clean close" and "IO error"
13450 as a "close". Stop calling closes "unexpected closes": existing
13451 Tors don't use SSL_close(), so having a connection close without
13452 the TLS shutdown handshake is hardly unexpected.
13453 - Send NAMESERVER_STATUS messages for a single failed nameserver
13456 o Code simplifications and refactoring:
13457 - Remove the tor_strpartition function: its logic was confused,
13458 and it was only used for one thing that could be implemented far
13462 Changes in version 0.2.0.19-alpha - 2008-02-09
13463 Tor 0.2.0.19-alpha makes more progress towards normalizing Tor's TLS
13464 handshake, makes path selection for relays more secure and IP address
13465 guessing more robust, and generally fixes a lot of bugs in preparation
13466 for calling the 0.2.0 branch stable.
13469 - Do not include recognizeable strings in the commonname part of
13470 Tor's x509 certificates.
13473 - If we're a relay, avoid picking ourselves as an introduction point,
13474 a rendezvous point, or as the final hop for internal circuits. Bug
13475 reported by taranis and lodger. Bugfix on 0.1.2.x.
13476 - Patch from "Andrew S. Lists" to catch when we contact a directory
13477 mirror at IP address X and he says we look like we're coming from
13478 IP address X. Bugfix on 0.1.2.x.
13480 o Minor features (security):
13481 - Be more paranoid about overwriting sensitive memory on free(),
13482 as a defensive programming tactic to ensure forward secrecy.
13484 o Minor features (directory authority):
13485 - Actually validate the options passed to AuthDirReject,
13486 AuthDirInvalid, AuthDirBadDir, and AuthDirBadExit.
13487 - Reject router descriptors with out-of-range bandwidthcapacity or
13488 bandwidthburst values.
13490 o Minor features (controller):
13491 - Reject controller commands over 1MB in length. This keeps rogue
13492 processes from running us out of memory.
13494 o Minor features (misc):
13495 - Give more descriptive well-formedness errors for out-of-range
13496 hidden service descriptor/protocol versions.
13497 - Make memory debugging information describe more about history
13498 of cell allocation, so we can help reduce our memory use.
13500 o Deprecated features (controller):
13501 - The status/version/num-versioning and status/version/num-concurring
13502 GETINFO options are no longer useful in the v3 directory protocol:
13503 treat them as deprecated, and warn when they're used.
13506 - When our consensus networkstatus has been expired for a while, stop
13507 being willing to build circuits using it. Fixes bug 401. Bugfix
13509 - Directory caches now fetch certificates from all authorities
13510 listed in a networkstatus consensus, even when they do not
13511 recognize them. Fixes bug 571. Bugfix on 0.2.0.x.
13512 - When connecting to a bridge without specifying its key, insert
13513 the connection into the identity-to-connection map as soon as
13514 a key is learned. Fixes bug 574. Bugfix on 0.2.0.x.
13515 - Detect versions of OS X where malloc_good_size() is present in the
13516 library but never actually declared. Resolves bug 587. Bugfix
13518 - Stop incorrectly truncating zlib responses to directory authority
13519 signature download requests. Fixes bug 593. Bugfix on 0.2.0.x.
13520 - Stop recommending that every server operator send mail to tor-ops.
13521 Resolves bug 597. Bugfix on 0.1.2.x.
13522 - Don't trigger an assert if we start a directory authority with a
13523 private IP address (like 127.0.0.1).
13524 - Avoid possible failures when generating a directory with routers
13525 with over-long versions strings, or too many flags set. Bugfix
13527 - If an attempt to launch a DNS resolve request over the control
13528 port fails because we have overrun the limit on the number of
13529 connections, tell the controller that the request has failed.
13530 - Avoid using too little bandwidth when our clock skips a few
13531 seconds. Bugfix on 0.1.2.x.
13532 - Fix shell error when warning about missing packages in configure
13533 script, on Fedora or Red Hat machines. Bugfix on 0.2.0.x.
13534 - Do not become confused when receiving a spurious VERSIONS-like
13535 cell from a confused v1 client. Bugfix on 0.2.0.x.
13536 - Re-fetch v2 (as well as v0) rendezvous descriptors when all
13537 introduction points for a hidden service have failed. Patch from
13538 Karsten Loesing. Bugfix on 0.2.0.x.
13540 o Code simplifications and refactoring:
13541 - Remove some needless generality from cpuworker code, for improved
13543 - Stop overloading the circuit_t.onionskin field for both "onionskin
13544 from a CREATE cell that we are waiting for a cpuworker to be
13545 assigned" and "onionskin from an EXTEND cell that we are going to
13546 send to an OR as soon as we are connected". Might help with bug 600.
13547 - Add an in-place version of aes_crypt() so that we can avoid doing a
13548 needless memcpy() call on each cell payload.
13551 Changes in version 0.2.0.18-alpha - 2008-01-25
13552 Tor 0.2.0.18-alpha adds a sixth v3 directory authority run by CCC,
13553 fixes a big memory leak in 0.2.0.17-alpha, and adds new config options
13554 that can warn or reject connections to ports generally associated with
13555 vulnerable-plaintext protocols.
13557 o New directory authorities:
13558 - Set up dannenberg (run by CCC) as the sixth v3 directory
13562 - Fix a major memory leak when attempting to use the v2 TLS
13563 handshake code. Bugfix on 0.2.0.x; fixes bug 589.
13564 - We accidentally enabled the under-development v2 TLS handshake
13565 code, which was causing log entries like "TLS error while
13566 renegotiating handshake". Disable it again. Resolves bug 590.
13567 - We were computing the wrong Content-Length: header for directory
13568 responses that need to be compressed on the fly, causing clients
13569 asking for those items to always fail. Bugfix on 0.2.0.x; partially
13573 - Avoid going directly to the directory authorities even if you're a
13574 relay, if you haven't found yourself reachable yet or if you've
13575 decided not to advertise your dirport yet. Addresses bug 556.
13576 - If we've gone 12 hours since our last bandwidth check, and we
13577 estimate we have less than 50KB bandwidth capacity but we could
13578 handle more, do another bandwidth test.
13579 - New config options WarnPlaintextPorts and RejectPlaintextPorts so
13580 Tor can warn and/or refuse connections to ports commonly used with
13581 vulnerable-plaintext protocols. Currently we warn on ports 23,
13582 109, 110, and 143, but we don't reject any.
13585 - When we setconf ClientOnly to 1, close any current OR and Dir
13586 listeners. Reported by mwenge.
13587 - When we get a consensus that's been signed by more people than
13588 we expect, don't log about it; it's not a big deal. Reported
13592 - Don't answer "/tor/networkstatus-bridges" directory requests if
13593 the request isn't encrypted.
13594 - Make "ClientOnly 1" config option disable directory ports too.
13595 - Patches from Karsten Loesing to make v2 hidden services more
13596 robust: work even when there aren't enough HSDir relays available;
13597 retry when a v2 rend desc fetch fails; but don't retry if we
13598 already have a usable v0 rend desc.
13601 Changes in version 0.2.0.17-alpha - 2008-01-17
13602 Tor 0.2.0.17-alpha makes the tarball build cleanly again (whoops).
13605 - Make the tor-gencert man page get included correctly in the tarball.
13608 Changes in version 0.2.0.16-alpha - 2008-01-17
13609 Tor 0.2.0.16-alpha adds a fifth v3 directory authority run by Karsten
13610 Loesing, and generally cleans up a lot of features and minor bugs.
13612 o New directory authorities:
13613 - Set up gabelmoo (run by Karsten Loesing) as the fifth v3 directory
13616 o Major performance improvements:
13617 - Switch our old ring buffer implementation for one more like that
13618 used by free Unix kernels. The wasted space in a buffer with 1mb
13619 of data will now be more like 8k than 1mb. The new implementation
13620 also avoids realloc();realloc(); patterns that can contribute to
13621 memory fragmentation.
13624 - Configuration files now accept C-style strings as values. This
13625 helps encode characters not allowed in the current configuration
13626 file format, such as newline or #. Addresses bug 557.
13627 - Although we fixed bug 539 (where servers would send HTTP status 503
13628 responses _and_ send a body too), there are still servers out
13629 there that haven't upgraded. Therefore, make clients parse such
13630 bodies when they receive them.
13631 - When we're not serving v2 directory information, there is no reason
13632 to actually keep any around. Remove the obsolete files and directory
13633 on startup if they are very old and we aren't going to serve them.
13635 o Minor performance improvements:
13636 - Reference-count and share copies of address policy entries; only 5%
13637 of them were actually distinct.
13638 - Never walk through the list of logs if we know that no log is
13639 interested in a given message.
13642 - When an authority has not signed a consensus, do not try to
13643 download a nonexistent "certificate with key 00000000". Bugfix
13644 on 0.2.0.x. Fixes bug 569.
13645 - Fix a rare assert error when we're closing one of our threads:
13646 use a mutex to protect the list of logs, so we never write to the
13647 list as it's being freed. Bugfix on 0.1.2.x. Fixes the very rare
13648 bug 575, which is kind of the revenge of bug 222.
13649 - Patch from Karsten Loesing to complain less at both the client
13650 and the relay when a relay used to have the HSDir flag but doesn't
13651 anymore, and we try to upload a hidden service descriptor.
13652 - Stop leaking one cert per TLS context. Fixes bug 582. Bugfix on
13654 - Do not try to download missing certificates until we have tried
13655 to check our fallback consensus. Fixes bug 583.
13656 - Make bridges round reported GeoIP stats info up to the nearest
13657 estimate, not down. Now we can distinguish between "0 people from
13658 this country" and "1 person from this country".
13659 - Avoid a spurious free on base64 failure. Bugfix on 0.1.2.
13660 - Avoid possible segfault if key generation fails in
13661 crypto_pk_hybrid_encrypt. Bugfix on 0.2.0.
13662 - Avoid segfault in the case where a badly behaved v2 versioning
13663 directory sends a signed networkstatus with missing client-versions.
13665 - Avoid segfaults on certain complex invocations of
13666 router_get_by_hexdigest(). Bugfix on 0.1.2.
13667 - Correct bad index on array access in parse_http_time(). Bugfix
13669 - Fix possible bug in vote generation when server versions are present
13670 but client versions are not.
13671 - Fix rare bug on REDIRECTSTREAM control command when called with no
13672 port set: it could erroneously report an error when none had
13674 - Avoid bogus crash-prone, leak-prone tor_realloc when we're
13675 compressing large objects and find ourselves with more than 4k
13676 left over. Bugfix on 0.2.0.
13677 - Fix a small memory leak when setting up a hidden service.
13678 - Fix a few memory leaks that could in theory happen under bizarre
13680 - Fix an assert if we post a general-purpose descriptor via the
13681 control port but that descriptor isn't mentioned in our current
13682 network consensus. Bug reported by Jon McLachlan; bugfix on
13685 o Minor features (controller):
13686 - Get NS events working again. Patch from tup.
13687 - The GETCONF command now escapes and quotes configuration values
13688 that don't otherwise fit into the torrc file.
13689 - The SETCONF command now handles quoted values correctly.
13691 o Minor features (directory authorities):
13692 - New configuration options to override default maximum number of
13693 servers allowed on a single IP address. This is important for
13694 running a test network on a single host.
13695 - Actually implement the -s option to tor-gencert.
13696 - Add a manual page for tor-gencert.
13698 o Minor features (bridges):
13699 - Bridge authorities no longer serve bridge descriptors over
13700 unencrypted connections.
13702 o Minor features (other):
13703 - Add hidden services and DNSPorts to the list of things that make
13704 Tor accept that it has running ports. Change starting Tor with no
13705 ports from a fatal error to a warning; we might change it back if
13706 this turns out to confuse anybody. Fixes bug 579.
13709 Changes in version 0.1.2.19 - 2008-01-17
13710 Tor 0.1.2.19 fixes a huge memory leak on exit relays, makes the default
13711 exit policy a little bit more conservative so it's safer to run an
13712 exit relay on a home system, and fixes a variety of smaller issues.
13715 - Exit policies now reject connections that are addressed to a
13716 relay's public (external) IP address too, unless
13717 ExitPolicyRejectPrivate is turned off. We do this because too
13718 many relays are running nearby to services that trust them based
13719 on network address.
13722 - When the clock jumps forward a lot, do not allow the bandwidth
13723 buckets to become negative. Fixes bug 544.
13724 - Fix a memory leak on exit relays; we were leaking a cached_resolve_t
13725 on every successful resolve. Reported by Mike Perry.
13726 - Purge old entries from the "rephist" database and the hidden
13727 service descriptor database even when DirPort is zero.
13728 - Stop thinking that 0.1.2.x directory servers can handle "begin_dir"
13729 requests. Should ease bugs 406 and 419 where 0.1.2.x relays are
13730 crashing or mis-answering these requests.
13731 - When we decide to send a 503 response to a request for servers, do
13732 not then also send the server descriptors: this defeats the whole
13733 purpose. Fixes bug 539.
13736 - Changing the ExitPolicyRejectPrivate setting should cause us to
13737 rebuild our server descriptor.
13738 - Fix handling of hex nicknames when answering controller requests for
13739 networkstatus by name, or when deciding whether to warn about
13740 unknown routers in a config option. (Patch from mwenge.)
13741 - Fix a couple of hard-to-trigger autoconf problems that could result
13742 in really weird results on platforms whose sys/types.h files define
13743 nonstandard integer types.
13744 - Don't try to create the datadir when running --verify-config or
13745 --hash-password. Resolves bug 540.
13746 - If we were having problems getting a particular descriptor from the
13747 directory caches, and then we learned about a new descriptor for
13748 that router, we weren't resetting our failure count. Reported
13750 - Although we fixed bug 539 (where servers would send HTTP status 503
13751 responses _and_ send a body too), there are still servers out there
13752 that haven't upgraded. Therefore, make clients parse such bodies
13753 when they receive them.
13754 - Run correctly on systems where rlim_t is larger than unsigned long.
13755 This includes some 64-bit systems.
13756 - Run correctly on platforms (like some versions of OS X 10.5) where
13757 the real limit for number of open files is OPEN_FILES, not rlim_max
13758 from getrlimit(RLIMIT_NOFILES).
13759 - Avoid a spurious free on base64 failure.
13760 - Avoid segfaults on certain complex invocations of
13761 router_get_by_hexdigest().
13762 - Fix rare bug on REDIRECTSTREAM control command when called with no
13763 port set: it could erroneously report an error when none had
13767 Changes in version 0.2.0.15-alpha - 2007-12-25
13768 Tor 0.2.0.14-alpha and 0.2.0.15-alpha fix a bunch of bugs with the
13769 features added in 0.2.0.13-alpha.
13772 - Fix several remotely triggerable asserts based on DirPort requests
13773 for a v2 or v3 networkstatus object before we were prepared. This
13774 was particularly bad for 0.2.0.13 and later bridge relays, who
13775 would never have a v2 networkstatus and would thus always crash
13776 when used. Bugfixes on 0.2.0.x.
13777 - Estimate the v3 networkstatus size more accurately, rather than
13778 estimating it at zero bytes and giving it artificially high priority
13779 compared to other directory requests. Bugfix on 0.2.0.x.
13782 - Fix configure.in logic for cross-compilation.
13783 - When we load a bridge descriptor from the cache, and it was
13784 previously unreachable, mark it as retriable so we won't just
13785 ignore it. Also, try fetching a new copy immediately. Bugfixes
13787 - The bridge GeoIP stats were counting other relays, for example
13788 self-reachability and authority-reachability tests.
13791 - Support compilation to target iPhone; patch from cjacker huang.
13792 To build for iPhone, pass the --enable-iphone option to configure.
13795 Changes in version 0.2.0.14-alpha - 2007-12-23
13797 - Fix a crash on startup if you install Tor 0.2.0.13-alpha fresh
13798 without a datadirectory from a previous Tor install. Reported
13800 - Fix a crash when we fetch a descriptor that turns out to be
13801 unexpected (it used to be in our networkstatus when we started
13802 fetching it, but it isn't in our current networkstatus), and we
13803 aren't using bridges. Bugfix on 0.2.0.x.
13804 - Fix a crash when accessing hidden services: it would work the first
13805 time you use a given introduction point for your service, but
13806 on subsequent requests we'd be using garbage memory. Fixed by
13807 Karsten Loesing. Bugfix on 0.2.0.13-alpha.
13808 - Fix a crash when we load a bridge descriptor from disk but we don't
13809 currently have a Bridge line for it in our torrc. Bugfix on
13813 - If bridge authorities set BridgePassword, they will serve a
13814 snapshot of known bridge routerstatuses from their DirPort to
13815 anybody who knows that password. Unset by default.
13818 - Make the unit tests build again.
13819 - Make "GETINFO/desc-annotations/id/<OR digest>" actually work.
13820 - Make PublishServerDescriptor default to 1, so the default doesn't
13821 have to change as we invent new directory protocol versions.
13822 - Fix test for rlim_t on OSX 10.3: sys/resource.h doesn't want to
13823 be included unless sys/time.h is already included. Fixes
13824 bug 553. Bugfix on 0.2.0.x.
13825 - If we receive a general-purpose descriptor and then receive an
13826 identical bridge-purpose descriptor soon after, don't discard
13827 the next one as a duplicate.
13830 - If BridgeRelay is set to 1, then the default for
13831 PublishServerDescriptor is now "bridge" rather than "v2,v3".
13832 - If the user sets RelayBandwidthRate but doesn't set
13833 RelayBandwidthBurst, then make them equal rather than erroring out.
13836 Changes in version 0.2.0.13-alpha - 2007-12-21
13837 Tor 0.2.0.13-alpha adds a fourth v3 directory authority run by Geoff
13838 Goodell, fixes many more bugs, and adds a lot of infrastructure for
13841 o New directory authorities:
13842 - Set up lefkada (run by Geoff Goodell) as the fourth v3 directory
13846 - Only update guard status (usable / not usable) once we have
13847 enough directory information. This was causing us to always pick
13848 two new guards on startup (bugfix on 0.2.0.9-alpha), and it was
13849 causing us to discard all our guards on startup if we hadn't been
13850 running for a few weeks (bugfix on 0.1.2.x). Fixes bug 448.
13851 - Purge old entries from the "rephist" database and the hidden
13852 service descriptor databases even when DirPort is zero. Bugfix
13854 - We were ignoring our RelayBandwidthRate for the first 30 seconds
13855 after opening a circuit -- even a relayed circuit. Bugfix on
13857 - Stop thinking that 0.1.2.x directory servers can handle "begin_dir"
13858 requests. Should ease bugs 406 and 419 where 0.1.2.x relays are
13859 crashing or mis-answering these types of requests.
13860 - Relays were publishing their server descriptor to v1 and v2
13861 directory authorities, but they didn't try publishing to v3-only
13862 authorities. Fix this; and also stop publishing to v1 authorities.
13864 - When we were reading router descriptors from cache, we were ignoring
13865 the annotations -- so for example we were reading in bridge-purpose
13866 descriptors as general-purpose descriptors. Bugfix on 0.2.0.8-alpha.
13867 - When we decided to send a 503 response to a request for servers, we
13868 were then also sending the server descriptors: this defeats the
13869 whole purpose. Fixes bug 539; bugfix on 0.1.2.x.
13872 - Bridge relays now behave like clients with respect to time
13873 intervals for downloading new consensus documents -- otherwise they
13874 stand out. Bridge users now wait until the end of the interval,
13875 so their bridge relay will be sure to have a new consensus document.
13876 - Three new config options (AlternateDirAuthority,
13877 AlternateBridgeAuthority, and AlternateHSAuthority) that let the
13878 user selectively replace the default directory authorities by type,
13879 rather than the all-or-nothing replacement that DirServer offers.
13880 - Tor can now be configured to read a GeoIP file from disk in one
13881 of two formats. This can be used by controllers to map IP addresses
13882 to countries. Eventually, it may support exit-by-country.
13883 - When possible, bridge relays remember which countries users
13884 are coming from, and report aggregate information in their
13885 extra-info documents, so that the bridge authorities can learn
13886 where Tor is blocked.
13887 - Bridge directory authorities now do reachability testing on the
13888 bridges they know. They provide router status summaries to the
13889 controller via "getinfo ns/purpose/bridge", and also dump summaries
13890 to a file periodically.
13891 - Stop fetching directory info so aggressively if your DirPort is
13892 on but your ORPort is off; stop fetching v2 dir info entirely.
13893 You can override these choices with the new FetchDirInfoEarly
13897 - The fix in 0.2.0.12-alpha cleared the "hsdir" flag in v3 network
13898 consensus documents when there are too many relays at a single
13899 IP address. Now clear it in v2 network status documents too, and
13900 also clear it in routerinfo_t when the relay is no longer listed
13901 in the relevant networkstatus document.
13902 - Don't crash if we get an unexpected value for the
13903 PublishServerDescriptor config option. Reported by Matt Edman;
13904 bugfix on 0.2.0.9-alpha.
13905 - Our new v2 hidden service descriptor format allows descriptors
13906 that have no introduction points. But Tor crashed when we tried
13907 to build a descriptor with no intro points (and it would have
13908 crashed if we had tried to parse one). Bugfix on 0.2.0.x; patch
13909 by Karsten Loesing.
13910 - Fix building with dmalloc 5.5.2 with glibc.
13911 - Reject uploaded descriptors and extrainfo documents if they're
13912 huge. Otherwise we'll cache them all over the network and it'll
13913 clog everything up. Reported by Aljosha Judmayer.
13914 - Check for presence of s6_addr16 and s6_addr32 fields in in6_addr
13915 via autoconf. Should fix compile on solaris. Bugfix on 0.2.0.x.
13916 - When the DANGEROUS_VERSION controller status event told us we're
13917 running an obsolete version, it used the string "OLD" to describe
13918 it. Yet the "getinfo" interface used the string "OBSOLETE". Now use
13919 "OBSOLETE" in both cases. Bugfix on 0.1.2.x.
13920 - If we can't expand our list of entry guards (e.g. because we're
13921 using bridges or we have StrictEntryNodes set), don't mark relays
13922 down when they fail a directory request. Otherwise we're too quick
13923 to mark all our entry points down. Bugfix on 0.1.2.x.
13924 - Fix handling of hex nicknames when answering controller requests for
13925 networkstatus by name, or when deciding whether to warn about unknown
13926 routers in a config option. Bugfix on 0.1.2.x. (Patch from mwenge.)
13927 - Fix a couple of hard-to-trigger autoconf problems that could result
13928 in really weird results on platforms whose sys/types.h files define
13929 nonstandard integer types. Bugfix on 0.1.2.x.
13930 - Fix compilation with --disable-threads set. Bugfix on 0.2.0.x.
13931 - Don't crash on name lookup when we have no current consensus. Fixes
13932 bug 538; bugfix on 0.2.0.x.
13933 - Only Tors that want to mirror the v2 directory info should
13934 create the "cached-status" directory in their datadir. (All Tors
13935 used to create it.) Bugfix on 0.2.0.9-alpha.
13936 - Directory authorities should only automatically download Extra Info
13937 documents if they're v1, v2, or v3 authorities. Bugfix on 0.1.2.x.
13940 - On the USR1 signal, when dmalloc is in use, log the top 10 memory
13941 consumers. (We already do this on HUP.)
13942 - Authorities and caches fetch the v2 networkstatus documents
13943 less often, now that v3 is encouraged.
13944 - Add a new config option BridgeRelay that specifies you want to
13945 be a bridge relay. Right now the only difference is that it makes
13946 you answer begin_dir requests, and it makes you cache dir info,
13947 even if your DirPort isn't on.
13948 - Add "GETINFO/desc-annotations/id/<OR digest>" so controllers can
13949 ask about source, timestamp of arrival, purpose, etc. We need
13950 something like this to help Vidalia not do GeoIP lookups on bridge
13952 - Allow multiple HashedControlPassword config lines, to support
13953 multiple controller passwords.
13954 - Authorities now decide whether they're authoritative for a given
13955 router based on the router's purpose.
13956 - New config options AuthDirBadDir and AuthDirListBadDirs for
13957 authorities to mark certain relays as "bad directories" in the
13958 networkstatus documents. Also supports the "!baddir" directive in
13959 the approved-routers file.
13962 Changes in version 0.2.0.12-alpha - 2007-11-16
13963 This twelfth development snapshot fixes some more build problems as
13964 well as a few minor bugs.
13967 - Make it build on OpenBSD again. Patch from tup.
13968 - Substitute BINDIR and LOCALSTATEDIR in scripts. Fixes
13969 package-building for Red Hat, OS X, etc.
13971 o Minor bugfixes (on 0.1.2.x):
13972 - Changing the ExitPolicyRejectPrivate setting should cause us to
13973 rebuild our server descriptor.
13975 o Minor bugfixes (on 0.2.0.x):
13976 - When we're lacking a consensus, don't try to perform rendezvous
13977 operations. Reported by Karsten Loesing.
13978 - Fix a small memory leak whenever we decide against using a
13979 newly picked entry guard. Reported by Mike Perry.
13980 - When authorities detected more than two relays running on the same
13981 IP address, they were clearing all the status flags but forgetting
13982 to clear the "hsdir" flag. So clients were being told that a
13983 given relay was the right choice for a v2 hsdir lookup, yet they
13984 never had its descriptor because it was marked as 'not running'
13986 - If we're trying to fetch a bridge descriptor and there's no way
13987 the bridge authority could help us (for example, we don't know
13988 a digest, or there is no bridge authority), don't be so eager to
13989 fall back to asking the bridge authority.
13990 - If we're using bridges or have strictentrynodes set, and our
13991 chosen exit is in the same family as all our bridges/entry guards,
13992 then be flexible about families.
13995 - When we negotiate a v2 link-layer connection (not yet implemented),
13996 accept RELAY_EARLY cells and turn them into RELAY cells if we've
13997 negotiated a v1 connection for their next step. Initial code for
14001 Changes in version 0.2.0.11-alpha - 2007-11-12
14002 This eleventh development snapshot fixes some build problems with
14003 the previous snapshot. It also includes a more secure-by-default exit
14004 policy for relays, fixes an enormous memory leak for exit relays, and
14005 fixes another bug where servers were falling out of the directory list.
14008 - Exit policies now reject connections that are addressed to a
14009 relay's public (external) IP address too, unless
14010 ExitPolicyRejectPrivate is turned off. We do this because too
14011 many relays are running nearby to services that trust them based
14012 on network address. Bugfix on 0.1.2.x.
14015 - Fix a memory leak on exit relays; we were leaking a cached_resolve_t
14016 on every successful resolve. Reported by Mike Perry; bugfix
14018 - On authorities, never downgrade to old router descriptors simply
14019 because they're listed in the consensus. This created a catch-22
14020 where we wouldn't list a new descriptor because there was an
14021 old one in the consensus, and we couldn't get the new one in the
14022 consensus because we wouldn't list it. Possible fix for bug 548.
14023 Also, this might cause bug 543 to appear on authorities; if so,
14024 we'll need a band-aid for that. Bugfix on 0.2.0.9-alpha.
14026 o Packaging fixes on 0.2.0.10-alpha:
14027 - We were including instructions about what to do with the
14028 src/config/fallback-consensus file, but we weren't actually
14029 including it in the tarball. Disable all of that for now.
14032 - Allow people to say PreferTunnelledDirConns rather than
14033 PreferTunneledDirConns, for those alternate-spellers out there.
14036 - Don't reevaluate all the information from our consensus document
14037 just because we've downloaded a v2 networkstatus that we intend
14038 to cache. Fixes bug 545; bugfix on 0.2.0.x.
14041 Changes in version 0.2.0.10-alpha - 2007-11-10
14042 This tenth development snapshot adds a third v3 directory authority
14043 run by Mike Perry, adds most of Karsten Loesing's new hidden service
14044 descriptor format, fixes a bad crash bug and new bridge bugs introduced
14045 in 0.2.0.9-alpha, fixes many bugs with the v3 directory implementation,
14046 fixes some minor memory leaks in previous 0.2.0.x snapshots, and
14047 addresses many more minor issues.
14049 o New directory authorities:
14050 - Set up ides (run by Mike Perry) as the third v3 directory authority.
14053 - Allow tunnelled directory connections to ask for an encrypted
14054 "begin_dir" connection or an anonymized "uses a full Tor circuit"
14055 connection independently. Now we can make anonymized begin_dir
14056 connections for (e.g.) more secure hidden service posting and
14058 - More progress on proposal 114: code from Karsten Loesing to
14059 implement new hidden service descriptor format.
14060 - Raise the default BandwidthRate/BandwidthBurst to 5MB/10MB, to
14061 accommodate the growing number of servers that use the default
14062 and are reaching it.
14063 - Directory authorities use a new formula for selecting which nodes
14064 to advertise as Guards: they must be in the top 7/8 in terms of
14065 how long we have known about them, and above the median of those
14066 nodes in terms of weighted fractional uptime.
14067 - Make "not enough dir info yet" warnings describe *why* Tor feels
14068 it doesn't have enough directory info yet.
14071 - Stop servers from crashing if they set a Family option (or
14072 maybe in other situations too). Bugfix on 0.2.0.9-alpha; reported
14074 - Make bridge users work again -- the move to v3 directories in
14075 0.2.0.9-alpha had introduced a number of bugs that made bridges
14076 no longer work for clients.
14077 - When the clock jumps forward a lot, do not allow the bandwidth
14078 buckets to become negative. Bugfix on 0.1.2.x; fixes bug 544.
14080 o Major bugfixes (v3 dir, bugfixes on 0.2.0.9-alpha):
14081 - When the consensus lists a router descriptor that we previously were
14082 mirroring, but that we considered non-canonical, reload the
14083 descriptor as canonical. This fixes bug 543 where Tor servers
14084 would start complaining after a few days that they don't have
14085 enough directory information to build a circuit.
14086 - Consider replacing the current consensus when certificates arrive
14087 that make the pending consensus valid. Previously, we were only
14088 considering replacement when the new certs _didn't_ help.
14089 - Fix an assert error on startup if we didn't already have the
14090 consensus and certs cached in our datadirectory: we were caching
14091 the consensus in consensus_waiting_for_certs but then free'ing it
14093 - Avoid sending a request for "keys/fp" (for which we'll get a 400 Bad
14094 Request) if we need more v3 certs but we've already got pending
14095 requests for all of them.
14096 - Correctly back off from failing certificate downloads. Fixes
14098 - Authorities don't vote on the Running flag if they have been running
14099 for less than 30 minutes themselves. Fixes bug 547, where a newly
14100 started authority would vote that everyone was down.
14102 o New requirements:
14103 - Drop support for OpenSSL version 0.9.6. Just about nobody was using
14104 it, it had no AES, and it hasn't seen any security patches since
14108 - Clients now hold circuitless TLS connections open for 1.5 times
14109 MaxCircuitDirtiness (15 minutes), since it is likely that they'll
14110 rebuild a new circuit over them within that timeframe. Previously,
14111 they held them open only for KeepalivePeriod (5 minutes).
14112 - Use "If-Modified-Since" to avoid retrieving consensus
14113 networkstatuses that we already have.
14114 - When we have no consensus, check FallbackNetworkstatusFile (defaults
14115 to $PREFIX/share/tor/fallback-consensus) for a consensus. This way
14116 we start knowing some directory caches.
14117 - When we receive a consensus from the future, warn about skew.
14118 - Improve skew reporting: try to give the user a better log message
14119 about how skewed they are, and how much this matters.
14120 - When we have a certificate for an authority, believe that
14121 certificate's claims about the authority's IP address.
14122 - New --quiet command-line option to suppress the default console log.
14123 Good in combination with --hash-password.
14124 - Authorities send back an X-Descriptor-Not-New header in response to
14125 an accepted-but-discarded descriptor upload. Partially implements
14127 - Make the log message for "tls error. breaking." more useful.
14128 - Better log messages about certificate downloads, to attempt to
14129 track down the second incarnation of bug 546.
14131 o Minor features (bridges):
14132 - If bridge users set UpdateBridgesFromAuthority, but the digest
14133 they ask for is a 404 from the bridge authority, they now fall
14134 back to trying the bridge directly.
14135 - Bridges now use begin_dir to publish their server descriptor to
14136 the bridge authority, even when they haven't set TunnelDirConns.
14138 o Minor features (controller):
14139 - When reporting clock skew, and we know that the clock is _at least
14140 as skewed_ as some value, but we don't know the actual value,
14141 report the value as a "minimum skew."
14144 - Update linux-tor-prio.sh script to allow QoS based on the uid of
14145 the Tor process. Patch from Marco Bonetti with tweaks from Mike
14149 - Refuse to start if both ORPort and UseBridges are set. Bugfix
14150 on 0.2.0.x, suggested by Matt Edman.
14151 - Don't stop fetching descriptors when FetchUselessDescriptors is
14152 set, even if we stop asking for circuits. Bugfix on 0.1.2.x;
14153 reported by tup and ioerror.
14154 - Better log message on vote from unknown authority.
14155 - Don't log "Launching 0 request for 0 router" message.
14157 o Minor bugfixes (memory leaks):
14158 - Stop leaking memory every time we parse a v3 certificate. Bugfix
14160 - Stop leaking memory every time we load a v3 certificate. Bugfix
14161 on 0.2.0.1-alpha. Fixes bug 536.
14162 - Stop leaking a cached networkstatus on exit. Bugfix on
14164 - Stop leaking voter information every time we free a consensus.
14165 Bugfix on 0.2.0.3-alpha.
14166 - Stop leaking signed data every time we check a voter signature.
14167 Bugfix on 0.2.0.3-alpha.
14168 - Stop leaking a signature every time we fail to parse a consensus or
14169 a vote. Bugfix on 0.2.0.3-alpha.
14170 - Stop leaking v2_download_status_map on shutdown. Bugfix on
14172 - Stop leaking conn->nickname every time we make a connection to a
14173 Tor relay without knowing its expected identity digest (e.g. when
14174 using bridges). Bugfix on 0.2.0.3-alpha.
14176 - Minor bugfixes (portability):
14177 - Run correctly on platforms where rlim_t is larger than unsigned
14178 long, and/or where the real limit for number of open files is
14179 OPEN_FILES, not rlim_max from getrlimit(RLIMIT_NOFILES). In
14180 particular, these may be needed for OS X 10.5.
14183 Changes in version 0.1.2.18 - 2007-10-28
14184 Tor 0.1.2.18 fixes many problems including crash bugs, problems with
14185 hidden service introduction that were causing huge delays, and a big
14186 bug that was causing some servers to disappear from the network status
14187 lists for a few hours each day.
14189 o Major bugfixes (crashes):
14190 - If a connection is shut down abruptly because of something that
14191 happened inside connection_flushed_some(), do not call
14192 connection_finished_flushing(). Should fix bug 451:
14193 "connection_stop_writing: Assertion conn->write_event failed"
14194 Bugfix on 0.1.2.7-alpha.
14195 - Fix possible segfaults in functions called from
14196 rend_process_relay_cell().
14198 o Major bugfixes (hidden services):
14199 - Hidden services were choosing introduction points uniquely by
14200 hexdigest, but when constructing the hidden service descriptor
14201 they merely wrote the (potentially ambiguous) nickname.
14202 - Clients now use the v2 intro format for hidden service
14203 connections: they specify their chosen rendezvous point by identity
14204 digest rather than by (potentially ambiguous) nickname. These
14205 changes could speed up hidden service connections dramatically.
14207 o Major bugfixes (other):
14208 - Stop publishing a new server descriptor just because we get a
14209 HUP signal. This led (in a roundabout way) to some servers getting
14210 dropped from the networkstatus lists for a few hours each day.
14211 - When looking for a circuit to cannibalize, consider family as well
14212 as identity. Fixes bug 438. Bugfix on 0.1.0.x (which introduced
14213 circuit cannibalization).
14214 - When a router wasn't listed in a new networkstatus, we were leaving
14215 the flags for that router alone -- meaning it remained Named,
14216 Running, etc -- even though absence from the networkstatus means
14217 that it shouldn't be considered to exist at all anymore. Now we
14218 clear all the flags for routers that fall out of the networkstatus
14219 consensus. Fixes bug 529.
14222 - Don't try to access (or alter) the state file when running
14223 --list-fingerprint or --verify-config or --hash-password. Resolves
14225 - When generating information telling us how to extend to a given
14226 router, do not try to include the nickname if it is
14227 absent. Resolves bug 467.
14228 - Fix a user-triggerable segfault in expand_filename(). (There isn't
14229 a way to trigger this remotely.)
14230 - When sending a status event to the controller telling it that an
14231 OR address is reachable, set the port correctly. (Previously we
14232 were reporting the dir port.)
14233 - Fix a minor memory leak whenever a controller sends the PROTOCOLINFO
14234 command. Bugfix on 0.1.2.17.
14235 - When loading bandwidth history, do not believe any information in
14236 the future. Fixes bug 434.
14237 - When loading entry guard information, do not believe any information
14239 - When we have our clock set far in the future and generate an
14240 onion key, then re-set our clock to be correct, we should not stop
14241 the onion key from getting rotated.
14242 - On some platforms, accept() can return a broken address. Detect
14243 this more quietly, and deal accordingly. Fixes bug 483.
14244 - It's not actually an error to find a non-pending entry in the DNS
14245 cache when canceling a pending resolve. Don't log unless stuff
14246 is fishy. Resolves bug 463.
14247 - Don't reset trusted dir server list when we set a configuration
14248 option. Patch from Robert Hogan.
14249 - Don't try to create the datadir when running --verify-config or
14250 --hash-password. Resolves bug 540.
14253 Changes in version 0.2.0.9-alpha - 2007-10-24
14254 This ninth development snapshot switches clients to the new v3 directory
14255 system; allows servers to be listed in the network status even when they
14256 have the same nickname as a registered server; and fixes many other
14257 bugs including a big one that was causing some servers to disappear
14258 from the network status lists for a few hours each day.
14260 o Major features (directory system):
14261 - Clients now download v3 consensus networkstatus documents instead
14262 of v2 networkstatus documents. Clients and caches now base their
14263 opinions about routers on these consensus documents. Clients only
14264 download router descriptors listed in the consensus.
14265 - Authorities now list servers who have the same nickname as
14266 a different named server, but list them with a new flag,
14267 "Unnamed". Now we can list servers that happen to pick the same
14268 nickname as a server that registered two years ago and then
14269 disappeared. Partially implements proposal 122.
14270 - If the consensus lists a router as "Unnamed", the name is assigned
14271 to a different router: do not identify the router by that name.
14272 Partially implements proposal 122.
14273 - Authorities can now come to a consensus on which method to use to
14274 compute the consensus. This gives us forward compatibility.
14277 - Stop publishing a new server descriptor just because we HUP or
14278 when we find our DirPort to be reachable but won't actually publish
14279 it. New descriptors without any real changes are dropped by the
14280 authorities, and can screw up our "publish every 18 hours" schedule.
14282 - When a router wasn't listed in a new networkstatus, we were leaving
14283 the flags for that router alone -- meaning it remained Named,
14284 Running, etc -- even though absence from the networkstatus means
14285 that it shouldn't be considered to exist at all anymore. Now we
14286 clear all the flags for routers that fall out of the networkstatus
14287 consensus. Fixes bug 529; bugfix on 0.1.2.x.
14288 - Fix awful behavior in DownloadExtraInfo option where we'd fetch
14289 extrainfo documents and then discard them immediately for not
14290 matching the latest router. Bugfix on 0.2.0.1-alpha.
14292 o Minor features (v3 directory protocol):
14293 - Allow tor-gencert to generate a new certificate without replacing
14295 - Allow certificates to include an address.
14296 - When we change our directory-cache settings, reschedule all voting
14297 and download operations.
14298 - Reattempt certificate downloads immediately on failure, as long as
14299 we haven't failed a threshold number of times yet.
14300 - Delay retrying consensus downloads while we're downloading
14301 certificates to verify the one we just got. Also, count getting a
14302 consensus that we already have (or one that isn't valid) as a failure,
14303 and count failing to get the certificates after 20 minutes as a
14305 - Build circuits and download descriptors even if our consensus is a
14306 little expired. (This feature will go away once authorities are
14309 o Minor features (router descriptor cache):
14310 - If we find a cached-routers file that's been sitting around for more
14311 than 28 days unmodified, then most likely it's a leftover from
14312 when we upgraded to 0.2.0.8-alpha. Remove it. It has no good
14314 - When we (as a cache) download a descriptor because it was listed
14315 in a consensus, remember when the consensus was supposed to expire,
14316 and don't expire the descriptor until then.
14318 o Minor features (performance):
14319 - Call routerlist_remove_old_routers() much less often. This should
14320 speed startup, especially on directory caches.
14321 - Don't try to launch new descriptor downloads quite so often when we
14322 already have enough directory information to build circuits.
14323 - Base64 decoding was actually showing up on our profile when parsing
14324 the initial descriptor file; switch to an in-process all-at-once
14325 implementation that's about 3.5x times faster than calling out to
14328 o Minor features (compilation):
14329 - Detect non-ASCII platforms (if any still exist) and refuse to
14330 build there: some of our code assumes that 'A' is 65 and so on.
14332 o Minor bugfixes (v3 directory authorities, bugfixes on 0.2.0.x):
14333 - Make the "next period" votes into "current period" votes immediately
14334 after publishing the consensus; avoid a heisenbug that made them
14335 stick around indefinitely.
14336 - When we discard a vote as a duplicate, do not report this as
14338 - Treat missing v3 keys or certificates as an error when running as a
14339 v3 directory authority.
14340 - When we're configured to be a v3 authority, but we're only listed
14341 as a non-v3 authority in our DirServer line for ourself, correct
14343 - If an authority doesn't have a qualified hostname, just put
14344 its address in the vote. This fixes the problem where we referred to
14345 "moria on moria:9031."
14346 - Distinguish between detached signatures for the wrong period, and
14347 detached signatures for a divergent vote.
14348 - Fix a small memory leak when computing a consensus.
14349 - When there's no concensus, we were forming a vote every 30
14350 minutes, but writing the "valid-after" line in our vote based
14351 on our configured V3AuthVotingInterval: so unless the intervals
14352 matched up, we immediately rejected our own vote because it didn't
14353 start at the voting interval that caused us to construct a vote.
14355 o Minor bugfixes (v3 directory protocol, bugfixes on 0.2.0.x):
14356 - Delete unverified-consensus when the real consensus is set.
14357 - Consider retrying a consensus networkstatus fetch immediately
14358 after one fails: don't wait 60 seconds to notice.
14359 - When fetching a consensus as a cache, wait until a newer consensus
14360 should exist before trying to replace the current one.
14361 - Use a more forgiving schedule for retrying failed consensus
14362 downloads than for other types.
14364 o Minor bugfixes (other directory issues):
14365 - Correct the implementation of "download votes by digest." Bugfix on
14367 - Authorities no longer send back "400 you're unreachable please fix
14368 it" errors to Tor servers that aren't online all the time. We're
14369 supposed to tolerate these servers now. Bugfix on 0.1.2.x.
14371 o Minor bugfixes (controller):
14372 - Don't reset trusted dir server list when we set a configuration
14373 option. Patch from Robert Hogan; bugfix on 0.1.2.x.
14374 - Respond to INT and TERM SIGNAL commands before we execute the
14375 signal, in case the signal shuts us down. We had a patch in
14376 0.1.2.1-alpha that tried to do this by queueing the response on
14377 the connection's buffer before shutting down, but that really
14378 isn't the same thing at all. Bug located by Matt Edman.
14380 o Minor bugfixes (misc):
14381 - Correctly check for bad options to the "PublishServerDescriptor"
14382 config option. Bugfix on 0.2.0.1-alpha; reported by Matt Edman.
14383 - Stop leaking memory on failing case of base32_decode, and make
14384 it accept upper-case letters. Bugfixes on 0.2.0.7-alpha.
14385 - Don't try to download extrainfo documents when we're trying to
14386 fetch enough directory info to build a circuit: having enough
14387 info should get priority. Bugfix on 0.2.0.x.
14388 - Don't complain that "your server has not managed to confirm that its
14389 ports are reachable" if we haven't been able to build any circuits
14390 yet. Bug found by spending four hours without a v3 consensus. Bugfix
14392 - Detect the reason for failing to mmap a descriptor file we just
14393 wrote, and give a more useful log message. Fixes bug 533. Bugfix
14396 o Code simplifications and refactoring:
14397 - Remove support for the old bw_accounting file: we've been storing
14398 bandwidth accounting information in the state file since
14399 0.1.2.5-alpha. This may result in bandwidth accounting errors
14400 if you try to upgrade from 0.1.1.x or earlier, or if you try to
14401 downgrade to 0.1.1.x or earlier.
14402 - New convenience code to locate a file within the DataDirectory.
14403 - Move non-authority functionality out of dirvote.c.
14404 - Refactor the arguments for router_pick_{directory_|trusteddir}server
14405 so that they all take the same named flags.
14408 - Include the "tor-ctrl.sh" bash script by Stefan Behte to provide
14409 Unix users an easy way to script their Tor process (e.g. by
14410 adjusting bandwidth based on the time of the day).
14413 Changes in version 0.2.0.8-alpha - 2007-10-12
14414 This eighth development snapshot fixes a crash bug that's been bothering
14415 us since February 2007, lets bridge authorities store a list of bridge
14416 descriptors they've seen, gets v3 directory voting closer to working,
14417 starts caching v3 directory consensus documents on directory mirrors,
14418 and fixes a variety of smaller issues including some minor memory leaks.
14420 o Major features (router descriptor cache):
14421 - Store routers in a file called cached-descriptors instead of in
14422 cached-routers. Initialize cached-descriptors from cached-routers
14423 if the old format is around. The new format allows us to store
14424 annotations along with descriptors.
14425 - Use annotations to record the time we received each descriptor, its
14426 source, and its purpose.
14427 - Disable the SETROUTERPURPOSE controller command: it is now
14429 - Controllers should now specify cache=no or cache=yes when using
14430 the +POSTDESCRIPTOR command.
14431 - Bridge authorities now write bridge descriptors to disk, meaning
14432 we can export them to other programs and begin distributing them
14435 o Major features (directory authorities):
14436 - When a v3 authority is missing votes or signatures, it now tries
14438 - Directory authorities track weighted fractional uptime as well as
14439 weighted mean-time-between failures. WFU is suitable for deciding
14440 whether a node is "usually up", while MTBF is suitable for deciding
14441 whether a node is "likely to stay up." We need both, because
14442 "usually up" is a good requirement for guards, while "likely to
14443 stay up" is a good requirement for long-lived connections.
14445 o Major features (v3 directory system):
14446 - Caches now download v3 network status documents as needed,
14447 and download the descriptors listed in them.
14448 - All hosts now attempt to download and keep fresh v3 authority
14449 certificates, and re-attempt after failures.
14450 - More internal-consistency checks for vote parsing.
14452 o Major bugfixes (crashes):
14453 - If a connection is shut down abruptly because of something that
14454 happened inside connection_flushed_some(), do not call
14455 connection_finished_flushing(). Should fix bug 451. Bugfix on
14458 o Major bugfixes (performance):
14459 - Fix really bad O(n^2) performance when parsing a long list of
14460 routers: Instead of searching the entire list for an "extra-info "
14461 string which usually wasn't there, once for every routerinfo
14462 we read, just scan lines forward until we find one we like.
14464 - When we add data to a write buffer in response to the data on that
14465 write buffer getting low because of a flush, do not consider the
14466 newly added data as a candidate for immediate flushing, but rather
14467 make it wait until the next round of writing. Otherwise, we flush
14468 and refill recursively, and a single greedy TLS connection can
14469 eat all of our bandwidth. Bugfix on 0.1.2.7-alpha.
14471 o Minor features (v3 authority system):
14472 - Add more ways for tools to download the votes that lead to the
14474 - Send a 503 when low on bandwidth and a vote, consensus, or
14475 certificate is requested.
14476 - If-modified-since is now implemented properly for all kinds of
14477 certificate requests.
14479 o Minor bugfixes (network statuses):
14480 - Tweak the implementation of proposal 109 slightly: allow at most
14481 two Tor servers on the same IP address, except if it's the location
14482 of a directory authority, in which case allow five. Bugfix on
14485 o Minor bugfixes (controller):
14486 - When sending a status event to the controller telling it that an
14487 OR address is reachable, set the port correctly. (Previously we
14488 were reporting the dir port.) Bugfix on 0.1.2.x.
14490 o Minor bugfixes (v3 directory system):
14491 - Fix logic to look up a cert by its signing key digest. Bugfix on
14493 - Only change the reply to a vote to "OK" if it's not already
14494 set. This gets rid of annoying "400 OK" log messages, which may
14495 have been masking some deeper issue. Bugfix on 0.2.0.7-alpha.
14496 - When we get a valid consensus, recompute the voting schedule.
14497 - Base the valid-after time of a vote on the consensus voting
14498 schedule, not on our preferred schedule.
14499 - Make the return values and messages from signature uploads and
14500 downloads more sensible.
14501 - Fix a memory leak when serving votes and consensus documents, and
14502 another when serving certificates.
14504 o Minor bugfixes (performance):
14505 - Use a slightly simpler string hashing algorithm (copying Python's
14506 instead of Java's) and optimize our digest hashing algorithm to take
14507 advantage of 64-bit platforms and to remove some possibly-costly
14509 - Fix a minor memory leak whenever we parse guards from our state
14510 file. Bugfix on 0.2.0.7-alpha.
14511 - Fix a minor memory leak whenever we write out a file. Bugfix on
14513 - Fix a minor memory leak whenever a controller sends the PROTOCOLINFO
14514 command. Bugfix on 0.2.0.5-alpha.
14516 o Minor bugfixes (portability):
14517 - On some platforms, accept() can return a broken address. Detect
14518 this more quietly, and deal accordingly. Fixes bug 483.
14519 - Stop calling tor_strlower() on uninitialized memory in some cases.
14520 Bugfix in 0.2.0.7-alpha.
14522 o Minor bugfixes (usability):
14523 - Treat some 403 responses from directory servers as INFO rather than
14524 WARN-severity events.
14525 - It's not actually an error to find a non-pending entry in the DNS
14526 cache when canceling a pending resolve. Don't log unless stuff is
14527 fishy. Resolves bug 463.
14529 o Minor bugfixes (anonymity):
14530 - Never report that we've used more bandwidth than we're willing to
14531 relay: it leaks how much non-relay traffic we're using. Resolves
14533 - When looking for a circuit to cannibalize, consider family as well
14534 as identity. Fixes bug 438. Bugfix on 0.1.0.x (which introduced
14535 circuit cannibalization).
14537 o Code simplifications and refactoring:
14538 - Make a bunch of functions static. Remove some dead code.
14539 - Pull out about a third of the really big routerlist.c; put it in a
14540 new module, networkstatus.c.
14541 - Merge the extra fields in local_routerstatus_t back into
14542 routerstatus_t: we used to need one routerstatus_t for each
14543 authority's opinion, plus a local_routerstatus_t for the locally
14544 computed consensus opinion. To save space, we put the locally
14545 modified fields into local_routerstatus_t, and only the common
14546 stuff into routerstatus_t. But once v3 directories are in use,
14547 clients and caches will no longer need to hold authority opinions;
14548 thus, the rationale for keeping the types separate is now gone.
14549 - Make the code used to reschedule and reattempt downloads more
14551 - Turn all 'Are we a directory server/mirror?' logic into a call to
14553 - Remove the code to generate the oldest (v1) directory format.
14554 The code has been disabled since 0.2.0.5-alpha.
14557 Changes in version 0.2.0.7-alpha - 2007-09-21
14558 This seventh development snapshot makes bridges work again, makes bridge
14559 authorities work for the first time, fixes two huge performance flaws
14560 in hidden services, and fixes a variety of minor issues.
14562 o New directory authorities:
14563 - Set up moria1 and tor26 as the first v3 directory authorities. See
14564 doc/spec/dir-spec.txt for details on the new directory design.
14566 o Major bugfixes (crashes):
14567 - Fix possible segfaults in functions called from
14568 rend_process_relay_cell(). Bugfix on 0.1.2.x.
14570 o Major bugfixes (bridges):
14571 - Fix a bug that made servers send a "404 Not found" in response to
14572 attempts to fetch their server descriptor. This caused Tor servers
14573 to take many minutes to establish reachability for their DirPort,
14574 and it totally crippled bridges. Bugfix on 0.2.0.5-alpha.
14575 - Make "UpdateBridgesFromAuthority" torrc option work: when bridge
14576 users configure that and specify a bridge with an identity
14577 fingerprint, now they will lookup the bridge descriptor at the
14578 default bridge authority via a one-hop tunnel, but once circuits
14579 are established they will switch to a three-hop tunnel for later
14580 connections to the bridge authority. Bugfix in 0.2.0.3-alpha.
14582 o Major bugfixes (hidden services):
14583 - Hidden services were choosing introduction points uniquely by
14584 hexdigest, but when constructing the hidden service descriptor
14585 they merely wrote the (potentially ambiguous) nickname.
14586 - Clients now use the v2 intro format for hidden service
14587 connections: they specify their chosen rendezvous point by identity
14588 digest rather than by (potentially ambiguous) nickname. Both
14589 are bugfixes on 0.1.2.x, and they could speed up hidden service
14590 connections dramatically. Thanks to Karsten Loesing.
14592 o Minor features (security):
14593 - As a client, do not believe any server that tells us that an
14594 address maps to an internal address space.
14595 - Make it possible to enable HashedControlPassword and
14596 CookieAuthentication at the same time.
14598 o Minor features (guard nodes):
14599 - Tag every guard node in our state file with the version that
14600 we believe added it, or with our own version if we add it. This way,
14601 if a user temporarily runs an old version of Tor and then switches
14602 back to a new one, she doesn't automatically lose her guards.
14604 o Minor features (speed):
14605 - When implementing AES counter mode, update only the portions of the
14606 counter buffer that need to change, and don't keep separate
14607 network-order and host-order counters when they are the same (i.e.,
14608 on big-endian hosts.)
14610 o Minor features (controller):
14611 - Accept LF instead of CRLF on controller, since some software has a
14612 hard time generating real Internet newlines.
14613 - Add GETINFO values for the server status events
14614 "REACHABILITY_SUCCEEDED" and "GOOD_SERVER_DESCRIPTOR". Patch from
14617 o Removed features:
14618 - Routers no longer include bandwidth-history lines in their
14619 descriptors; this information is already available in extra-info
14620 documents, and including it in router descriptors took up 60%
14621 (!) of compressed router descriptor downloads. Completes
14622 implementation of proposal 104.
14623 - Remove the contrib scripts ExerciseServer.py, PathDemo.py,
14624 and TorControl.py, as they use the old v0 controller protocol,
14625 and are obsoleted by TorFlow anyway.
14626 - Drop support for v1 rendezvous descriptors, since we never used
14627 them anyway, and the code has probably rotted by now. Based on
14628 patch from Karsten Loesing.
14629 - On OSX, stop warning the user that kqueue support in libevent is
14630 "experimental", since it seems to have worked fine for ages.
14633 - When generating information telling us how to extend to a given
14634 router, do not try to include the nickname if it is absent. Fixes
14635 bug 467. Bugfix on 0.2.0.3-alpha.
14636 - Fix a user-triggerable (but not remotely-triggerable) segfault
14637 in expand_filename(). Bugfix on 0.1.2.x.
14638 - Fix a memory leak when freeing incomplete requests from DNSPort.
14639 Found by Niels Provos with valgrind. Bugfix on 0.2.0.1-alpha.
14640 - Don't try to access (or alter) the state file when running
14641 --list-fingerprint or --verify-config or --hash-password. (Resolves
14642 bug 499.) Bugfix on 0.1.2.x.
14643 - Servers used to decline to publish their DirPort if their
14644 BandwidthRate, RelayBandwidthRate, or MaxAdvertisedBandwidth
14645 were below a threshold. Now they only look at BandwidthRate and
14646 RelayBandwidthRate. Bugfix on 0.1.2.x.
14647 - Remove an optimization in the AES counter-mode code that assumed
14648 that the counter never exceeded 2^68. When the counter can be set
14649 arbitrarily as an IV (as it is by Karsten's new hidden services
14650 code), this assumption no longer holds. Bugfix on 0.1.2.x.
14651 - Resume listing "AUTHORITY" flag for authorities in network status.
14652 Bugfix on 0.2.0.3-alpha; reported by Alex de Joode.
14654 o Code simplifications and refactoring:
14655 - Revamp file-writing logic so we don't need to have the entire
14656 contents of a file in memory at once before we write to disk. Tor,
14658 - Turn "descriptor store" into a full-fledged type.
14659 - Move all NT services code into a separate source file.
14660 - Unify all code that computes medians, percentile elements, etc.
14661 - Get rid of a needless malloc when parsing address policies.
14664 Changes in version 0.1.2.17 - 2007-08-30
14665 Tor 0.1.2.17 features a new Vidalia version in the Windows and OS
14666 X bundles. Vidalia 0.0.14 makes authentication required for the
14667 ControlPort in the default configuration, which addresses important
14668 security risks. Everybody who uses Vidalia (or another controller)
14671 In addition, this Tor update fixes major load balancing problems with
14672 path selection, which should speed things up a lot once many people
14675 o Major bugfixes (security):
14676 - We removed support for the old (v0) control protocol. It has been
14677 deprecated since Tor 0.1.1.1-alpha, and keeping it secure has
14678 become more of a headache than it's worth.
14680 o Major bugfixes (load balancing):
14681 - When choosing nodes for non-guard positions, weight guards
14682 proportionally less, since they already have enough load. Patch
14684 - Raise the "max believable bandwidth" from 1.5MB/s to 10MB/s. This
14685 will allow fast Tor servers to get more attention.
14686 - When we're upgrading from an old Tor version, forget our current
14687 guards and pick new ones according to the new weightings. These
14688 three load balancing patches could raise effective network capacity
14689 by a factor of four. Thanks to Mike Perry for measurements.
14691 o Major bugfixes (stream expiration):
14692 - Expire not-yet-successful application streams in all cases if
14693 they've been around longer than SocksTimeout. Right now there are
14694 some cases where the stream will live forever, demanding a new
14695 circuit every 15 seconds. Fixes bug 454; reported by lodger.
14697 o Minor features (controller):
14698 - Add a PROTOCOLINFO controller command. Like AUTHENTICATE, it
14699 is valid before any authentication has been received. It tells
14700 a controller what kind of authentication is expected, and what
14701 protocol is spoken. Implements proposal 119.
14703 o Minor bugfixes (performance):
14704 - Save on most routerlist_assert_ok() calls in routerlist.c, thus
14705 greatly speeding up loading cached-routers from disk on startup.
14706 - Disable sentinel-based debugging for buffer code: we squashed all
14707 the bugs that this was supposed to detect a long time ago, and now
14708 its only effect is to change our buffer sizes from nice powers of
14709 two (which platform mallocs tend to like) to values slightly over
14710 powers of two (which make some platform mallocs sad).
14712 o Minor bugfixes (misc):
14713 - If exit bandwidth ever exceeds one third of total bandwidth, then
14714 use the correct formula to weight exit nodes when choosing paths.
14715 Based on patch from Mike Perry.
14716 - Choose perfectly fairly among routers when choosing by bandwidth and
14717 weighting by fraction of bandwidth provided by exits. Previously, we
14718 would choose with only approximate fairness, and correct ourselves
14719 if we ran off the end of the list.
14720 - If we require CookieAuthentication but we fail to write the
14721 cookie file, we would warn but not exit, and end up in a state
14722 where no controller could authenticate. Now we exit.
14723 - If we require CookieAuthentication, stop generating a new cookie
14724 every time we change any piece of our config.
14725 - Refuse to start with certain directory authority keys, and
14726 encourage people using them to stop.
14727 - Terminate multi-line control events properly. Original patch
14729 - Fix a minor memory leak when we fail to find enough suitable
14730 servers to choose a circuit.
14731 - Stop leaking part of the descriptor when we run into a particularly
14732 unparseable piece of it.
14735 Changes in version 0.2.0.6-alpha - 2007-08-26
14736 This sixth development snapshot features a new Vidalia version in the
14737 Windows and OS X bundles. Vidalia 0.0.14 makes authentication required for
14738 the ControlPort in the default configuration, which addresses important
14741 In addition, this snapshot fixes major load balancing problems
14742 with path selection, which should speed things up a lot once many
14743 people have upgraded. The directory authorities also use a new
14744 mean-time-between-failure approach to tracking which servers are stable,
14745 rather than just looking at the most recent uptime.
14747 o New directory authorities:
14748 - Set up Tonga as the default bridge directory authority.
14751 - Directory authorities now track servers by weighted
14752 mean-times-between-failures. When we have 4 or more days of data,
14753 use measured MTBF rather than declared uptime to decide whether
14754 to call a router Stable. Implements proposal 108.
14756 o Major bugfixes (load balancing):
14757 - When choosing nodes for non-guard positions, weight guards
14758 proportionally less, since they already have enough load. Patch
14760 - Raise the "max believable bandwidth" from 1.5MB/s to 10MB/s. This
14761 will allow fast Tor servers to get more attention.
14762 - When we're upgrading from an old Tor version, forget our current
14763 guards and pick new ones according to the new weightings. These
14764 three load balancing patches could raise effective network capacity
14765 by a factor of four. Thanks to Mike Perry for measurements.
14767 o Major bugfixes (descriptor parsing):
14768 - Handle unexpected whitespace better in malformed descriptors. Bug
14769 found using Benedikt Boss's new Tor fuzzer! Bugfix on 0.2.0.x.
14772 - There is now an ugly, temporary "desc/all-recent-extrainfo-hack"
14773 GETINFO for Torstat to use until it can switch to using extrainfos.
14774 - Optionally (if built with -DEXPORTMALLINFO) export the output
14775 of mallinfo via http, as tor/mallinfo.txt. Only accessible
14779 - Do not intermix bridge routers with controller-added
14780 routers. (Bugfix on 0.2.0.x)
14781 - Do not fail with an assert when accept() returns an unexpected
14782 address family. Addresses but does not wholly fix bug 483. (Bugfix
14784 - Let directory authorities startup even when they can't generate
14785 a descriptor immediately, e.g. because they don't know their
14787 - Stop putting the authentication cookie in a file called "0"
14788 in your working directory if you don't specify anything for the
14789 new CookieAuthFile option. Reported by Matt Edman.
14790 - Make it possible to read the PROTOCOLINFO response in a way that
14791 conforms to our control-spec. Reported by Matt Edman.
14792 - Fix a minor memory leak when we fail to find enough suitable
14793 servers to choose a circuit. Bugfix on 0.1.2.x.
14794 - Stop leaking part of the descriptor when we run into a particularly
14795 unparseable piece of it. Bugfix on 0.1.2.x.
14796 - Unmap the extrainfo cache file on exit.
14799 Changes in version 0.2.0.5-alpha - 2007-08-19
14800 This fifth development snapshot fixes compilation on Windows again;
14801 fixes an obnoxious client-side bug that slowed things down and put
14802 extra load on the network; gets us closer to using the v3 directory
14803 voting scheme; makes it easier for Tor controllers to use cookie-based
14804 authentication; and fixes a variety of other bugs.
14806 o Removed features:
14807 - Version 1 directories are no longer generated in full. Instead,
14808 authorities generate and serve "stub" v1 directories that list
14809 no servers. This will stop Tor versions 0.1.0.x and earlier from
14810 working, but (for security reasons) nobody should be running those
14813 o Major bugfixes (compilation, 0.2.0.x):
14814 - Try to fix Win32 compilation again: improve checking for IPv6 types.
14815 - Try to fix MSVC compilation: build correctly on platforms that do
14816 not define s6_addr16 or s6_addr32.
14817 - Fix compile on platforms without getaddrinfo: bug found by Li-Hui
14820 o Major bugfixes (stream expiration):
14821 - Expire not-yet-successful application streams in all cases if
14822 they've been around longer than SocksTimeout. Right now there are
14823 some cases where the stream will live forever, demanding a new
14824 circuit every 15 seconds. Bugfix on 0.1.2.7-alpha; fixes bug 454;
14825 reported by lodger.
14827 o Minor features (directory servers):
14828 - When somebody requests a list of statuses or servers, and we have
14829 none of those, return a 404 rather than an empty 200.
14831 o Minor features (directory voting):
14832 - Store v3 consensus status consensuses on disk, and reload them
14835 o Minor features (security):
14836 - Warn about unsafe ControlPort configurations.
14837 - Refuse to start with certain directory authority keys, and
14838 encourage people using them to stop.
14840 o Minor features (controller):
14841 - Add a PROTOCOLINFO controller command. Like AUTHENTICATE, it
14842 is valid before any authentication has been received. It tells
14843 a controller what kind of authentication is expected, and what
14844 protocol is spoken. Implements proposal 119.
14845 - New config option CookieAuthFile to choose a new location for the
14846 cookie authentication file, and config option
14847 CookieAuthFileGroupReadable to make it group-readable.
14849 o Minor features (unit testing):
14850 - Add command-line arguments to unit-test executable so that we can
14851 invoke any chosen test from the command line rather than having
14852 to run the whole test suite at once; and so that we can turn on
14853 logging for the unit tests.
14855 o Minor bugfixes (on 0.1.2.x):
14856 - If we require CookieAuthentication but we fail to write the
14857 cookie file, we would warn but not exit, and end up in a state
14858 where no controller could authenticate. Now we exit.
14859 - If we require CookieAuthentication, stop generating a new cookie
14860 every time we change any piece of our config.
14861 - When loading bandwidth history, do not believe any information in
14862 the future. Fixes bug 434.
14863 - When loading entry guard information, do not believe any information
14865 - When we have our clock set far in the future and generate an
14866 onion key, then re-set our clock to be correct, we should not stop
14867 the onion key from getting rotated.
14868 - Clean up torrc sample config file.
14869 - Do not automatically run configure from autogen.sh. This
14870 non-standard behavior tended to annoy people who have built other
14873 o Minor bugfixes (on 0.2.0.x):
14874 - Fix a bug with AutomapHostsOnResolve that would always cause
14875 the second request to fail. Bug reported by Kate. Bugfix on
14877 - Fix a bug in ADDRMAP controller replies that would sometimes
14878 try to print a NULL. Patch from tup.
14879 - Read v3 directory authority keys from the right location.
14880 - Numerous bugfixes to directory voting code.
14883 Changes in version 0.1.2.16 - 2007-08-01
14884 Tor 0.1.2.16 fixes a critical security vulnerability that allows a
14885 remote attacker in certain situations to rewrite the user's torrc
14886 configuration file. This can completely compromise anonymity of users
14887 in most configurations, including those running the Vidalia bundles,
14888 TorK, etc. Or worse.
14890 o Major security fixes:
14891 - Close immediately after missing authentication on control port;
14892 do not allow multiple authentication attempts.
14895 Changes in version 0.2.0.4-alpha - 2007-08-01
14896 This fourth development snapshot fixes a critical security vulnerability
14897 for most users, specifically those running Vidalia, TorK, etc. Everybody
14898 should upgrade to either 0.1.2.16 or 0.2.0.4-alpha.
14900 o Major security fixes:
14901 - Close immediately after missing authentication on control port;
14902 do not allow multiple authentication attempts.
14904 o Major bugfixes (compilation):
14905 - Fix win32 compilation: apparently IN_ADDR and IN6_ADDR are already
14908 o Minor features (performance):
14909 - Be even more aggressive about releasing RAM from small
14910 empty buffers. Thanks to our free-list code, this shouldn't be too
14911 performance-intensive.
14912 - Disable sentinel-based debugging for buffer code: we squashed all
14913 the bugs that this was supposed to detect a long time ago, and
14914 now its only effect is to change our buffer sizes from nice
14915 powers of two (which platform mallocs tend to like) to values
14916 slightly over powers of two (which make some platform mallocs sad).
14917 - Log malloc statistics from mallinfo() on platforms where it
14921 Changes in version 0.2.0.3-alpha - 2007-07-29
14922 This third development snapshot introduces new experimental
14923 blocking-resistance features and a preliminary version of the v3
14924 directory voting design, and includes many other smaller features
14928 - The first pieces of our "bridge" design for blocking-resistance
14929 are implemented. People can run bridge directory authorities;
14930 people can run bridges; and people can configure their Tor clients
14931 with a set of bridges to use as the first hop into the Tor network.
14932 See http://archives.seul.org/or/talk/Jul-2007/msg00249.html for
14934 - Create listener connections before we setuid to the configured
14935 User and Group. Now non-Windows users can choose port values
14936 under 1024, start Tor as root, and have Tor bind those ports
14937 before it changes to another UID. (Windows users could already
14939 - Added a new ConstrainedSockets config option to set SO_SNDBUF and
14940 SO_RCVBUF on TCP sockets. Hopefully useful for Tor servers running
14941 on "vserver" accounts. (Patch from coderman.)
14942 - Be even more aggressive about separating local traffic from relayed
14943 traffic when RelayBandwidthRate is set. (Refines proposal 111.)
14945 o Major features (experimental):
14946 - First cut of code for "v3 dir voting": directory authorities will
14947 vote on a common network status document rather than each publishing
14948 their own opinion. This code needs more testing and more corner-case
14949 handling before it's ready for use.
14952 - Directory authorities now call routers Fast if their bandwidth is
14953 at least 100KB/s, and consider their bandwidth adequate to be a
14954 Guard if it is at least 250KB/s, no matter the medians. This fix
14955 complements proposal 107. [Bugfix on 0.1.2.x]
14956 - Directory authorities now never mark more than 3 servers per IP as
14957 Valid and Running. (Implements proposal 109, by Kevin Bauer and
14959 - Minor change to organizationName and commonName generation
14960 procedures in TLS certificates during Tor handshakes, to invalidate
14961 some earlier censorware approaches. This is not a long-term
14962 solution, but applying it will give us a bit of time to look into
14963 the epidemiology of countermeasures as they spread.
14965 o Major bugfixes (directory):
14966 - Rewrite directory tokenization code to never run off the end of
14967 a string. Fixes bug 455. Patch from croup. [Bugfix on 0.1.2.x]
14969 o Minor features (controller):
14970 - Add a SOURCE_ADDR field to STREAM NEW events so that controllers can
14971 match requests to applications. (Patch from Robert Hogan.)
14972 - Report address and port correctly on connections to DNSPort. (Patch
14973 from Robert Hogan.)
14974 - Add a RESOLVE command to launch hostname lookups. (Original patch
14975 from Robert Hogan.)
14976 - Add GETINFO status/enough-dir-info to let controllers tell whether
14977 Tor has downloaded sufficient directory information. (Patch
14979 - You can now use the ControlSocket option to tell Tor to listen for
14980 controller connections on Unix domain sockets on systems that
14981 support them. (Patch from Peter Palfrader.)
14982 - STREAM NEW events are generated for DNSPort requests and for
14983 tunneled directory connections. (Patch from Robert Hogan.)
14984 - New "GETINFO address-mappings/*" command to get address mappings
14985 with expiry information. "addr-mappings/*" is now deprecated.
14988 o Minor features (misc):
14989 - Merge in some (as-yet-unused) IPv6 address manipulation code. (Patch
14991 - The tor-gencert tool for v3 directory authorities now creates all
14992 files as readable to the file creator only, and write-protects
14993 the authority identity key.
14994 - When dumping memory usage, list bytes used in buffer memory
14996 - When running with dmalloc, dump more stats on hup and on exit.
14997 - Directory authorities now fail quickly and (relatively) harmlessly
14998 if they generate a network status document that is somehow
15001 o Traffic load balancing improvements:
15002 - If exit bandwidth ever exceeds one third of total bandwidth, then
15003 use the correct formula to weight exit nodes when choosing paths.
15004 (Based on patch from Mike Perry.)
15005 - Choose perfectly fairly among routers when choosing by bandwidth and
15006 weighting by fraction of bandwidth provided by exits. Previously, we
15007 would choose with only approximate fairness, and correct ourselves
15008 if we ran off the end of the list. [Bugfix on 0.1.2.x]
15010 o Performance improvements:
15011 - Be more aggressive with freeing buffer RAM or putting it on the
15013 - Use Critical Sections rather than Mutexes for synchronizing threads
15014 on win32; Mutexes are heavier-weight, and designed for synchronizing
15017 o Deprecated and removed features:
15018 - RedirectExits is now deprecated.
15019 - Stop allowing address masks that do not correspond to bit prefixes.
15020 We have warned about these for a really long time; now it's time
15021 to reject them. (Patch from croup.)
15023 o Minor bugfixes (directory):
15024 - Fix another crash bug related to extra-info caching. (Bug found by
15025 Peter Palfrader.) [Bugfix on 0.2.0.2-alpha]
15026 - Directories no longer return a "304 not modified" when they don't
15027 have the networkstatus the client asked for. Also fix a memory
15028 leak when returning 304 not modified. [Bugfixes on 0.2.0.2-alpha]
15029 - We had accidentally labelled 0.1.2.x directory servers as not
15030 suitable for begin_dir requests, and had labelled no directory
15031 servers as suitable for uploading extra-info documents. [Bugfix
15034 o Minor bugfixes (dns):
15035 - Fix a crash when DNSPort is set more than once. (Patch from Robert
15036 Hogan.) [Bugfix on 0.2.0.2-alpha]
15037 - Add DNSPort connections to the global connection list, so that we
15038 can time them out correctly. (Bug found by Robert Hogan.) [Bugfix
15040 - Fix a dangling reference that could lead to a crash when DNSPort is
15041 changed or closed (Patch from Robert Hogan.) [Bugfix on
15044 o Minor bugfixes (controller):
15045 - Provide DNS expiry times in GMT, not in local time. For backward
15046 compatibility, ADDRMAP events only provide GMT expiry in an extended
15047 field. "GETINFO address-mappings" always does the right thing.
15048 - Use CRLF line endings properly in NS events.
15049 - Terminate multi-line control events properly. (Original patch
15050 from tup.) [Bugfix on 0.1.2.x-alpha]
15051 - Do not include spaces in SOURCE_ADDR fields in STREAM
15052 events. Resolves bug 472. [Bugfix on 0.2.0.x-alpha]
15055 Changes in version 0.1.2.15 - 2007-07-17
15056 Tor 0.1.2.15 fixes several crash bugs, fixes some anonymity-related
15057 problems, fixes compilation on BSD, and fixes a variety of other
15058 bugs. Everybody should upgrade.
15060 o Major bugfixes (compilation):
15061 - Fix compile on FreeBSD/NetBSD/OpenBSD. Oops.
15063 o Major bugfixes (crashes):
15064 - Try even harder not to dereference the first character after
15065 an mmap(). Reported by lodger.
15066 - Fix a crash bug in directory authorities when we re-number the
15067 routerlist while inserting a new router.
15068 - When the cached-routers file is an even multiple of the page size,
15069 don't run off the end and crash. (Fixes bug 455; based on idea
15071 - Fix eventdns.c behavior on Solaris: It is critical to include
15072 orconfig.h _before_ sys/types.h, so that we can get the expected
15073 definition of _FILE_OFFSET_BITS.
15075 o Major bugfixes (security):
15076 - Fix a possible buffer overrun when using BSD natd support. Bug
15078 - When sending destroy cells from a circuit's origin, don't include
15079 the reason for tearing down the circuit. The spec says we didn't,
15080 and now we actually don't. Reported by lodger.
15081 - Keep streamids from different exits on a circuit separate. This
15082 bug may have allowed other routers on a given circuit to inject
15083 cells into streams. Reported by lodger; fixes bug 446.
15084 - If there's a never-before-connected-to guard node in our list,
15085 never choose any guards past it. This way we don't expand our
15086 guard list unless we need to.
15088 o Minor bugfixes (guard nodes):
15089 - Weight guard selection by bandwidth, so that low-bandwidth nodes
15090 don't get overused as guards.
15092 o Minor bugfixes (directory):
15093 - Correctly count the number of authorities that recommend each
15094 version. Previously, we were under-counting by 1.
15095 - Fix a potential crash bug when we load many server descriptors at
15096 once and some of them make others of them obsolete. Fixes bug 458.
15098 o Minor bugfixes (hidden services):
15099 - Stop tearing down the whole circuit when the user asks for a
15100 connection to a port that the hidden service didn't configure.
15103 o Minor bugfixes (misc):
15104 - On Windows, we were preventing other processes from reading
15105 cached-routers while Tor was running. Reported by janbar.
15106 - Fix a possible (but very unlikely) bug in picking routers by
15107 bandwidth. Add a log message to confirm that it is in fact
15108 unlikely. Patch from lodger.
15109 - Backport a couple of memory leak fixes.
15110 - Backport miscellaneous cosmetic bugfixes.
15113 Changes in version 0.2.0.2-alpha - 2007-06-02
15114 o Major bugfixes on 0.2.0.1-alpha:
15115 - Fix an assertion failure related to servers without extra-info digests.
15116 Resolves bugs 441 and 442.
15118 o Minor features (directory):
15119 - Support "If-Modified-Since" when answering HTTP requests for
15120 directories, running-routers documents, and network-status documents.
15121 (There's no need to support it for router descriptors, since those
15122 are downloaded by descriptor digest.)
15124 o Minor build issues:
15125 - Clear up some MIPSPro compiler warnings.
15126 - When building from a tarball on a machine that happens to have SVK
15127 installed, report the micro-revision as whatever version existed
15128 in the tarball, not as "x".
15131 Changes in version 0.2.0.1-alpha - 2007-06-01
15132 This early development snapshot provides new features for people running
15133 Tor as both a client and a server (check out the new RelayBandwidth
15134 config options); lets Tor run as a DNS proxy; and generally moves us
15135 forward on a lot of fronts.
15137 o Major features, server usability:
15138 - New config options RelayBandwidthRate and RelayBandwidthBurst:
15139 a separate set of token buckets for relayed traffic. Right now
15140 relayed traffic is defined as answers to directory requests, and
15141 OR connections that don't have any local circuits on them.
15143 o Major features, client usability:
15144 - A client-side DNS proxy feature to replace the need for
15145 dns-proxy-tor: Just set "DNSPort 9999", and Tor will now listen
15146 for DNS requests on port 9999, use the Tor network to resolve them
15147 anonymously, and send the reply back like a regular DNS server.
15148 The code still only implements a subset of DNS.
15149 - Make PreferTunneledDirConns and TunnelDirConns work even when
15150 we have no cached directory info. This means Tor clients can now
15151 do all of their connections protected by TLS.
15153 o Major features, performance and efficiency:
15154 - Directory authorities accept and serve "extra info" documents for
15155 routers. These documents contain fields from router descriptors
15156 that aren't usually needed, and that use a lot of excess
15157 bandwidth. Once these fields are removed from router descriptors,
15158 the bandwidth savings should be about 60%. [Partially implements
15160 - Servers upload extra-info documents to any authority that accepts
15161 them. Authorities (and caches that have been configured to download
15162 extra-info documents) download them as needed. [Partially implements
15164 - Change the way that Tor buffers data that it is waiting to write.
15165 Instead of queueing data cells in an enormous ring buffer for each
15166 client->OR or OR->OR connection, we now queue cells on a separate
15167 queue for each circuit. This lets us use less slack memory, and
15168 will eventually let us be smarter about prioritizing different kinds
15170 - Use memory pools to allocate cells with better speed and memory
15171 efficiency, especially on platforms where malloc() is inefficient.
15172 - Stop reading on edge connections when their corresponding circuit
15173 buffers are full; start again as the circuits empty out.
15175 o Major features, other:
15176 - Add an HSAuthorityRecordStats option that hidden service authorities
15177 can use to track statistics of overall hidden service usage without
15178 logging information that would be very useful to an attacker.
15179 - Start work implementing multi-level keys for directory authorities:
15180 Add a standalone tool to generate key certificates. (Proposal 103.)
15183 - Directory authorities now call routers Stable if they have an
15184 uptime of at least 30 days, even if that's not the median uptime
15185 in the network. Implements proposal 107, suggested by Kevin Bauer
15188 o Minor fixes (resource management):
15189 - Count the number of open sockets separately from the number
15190 of active connection_t objects. This will let us avoid underusing
15191 our allocated connection limit.
15192 - We no longer use socket pairs to link an edge connection to an
15193 anonymous directory connection or a DirPort test connection.
15194 Instead, we track the link internally and transfer the data
15195 in-process. This saves two sockets per "linked" connection (at the
15196 client and at the server), and avoids the nasty Windows socketpair()
15198 - Keep unused 4k and 16k buffers on free lists, rather than wasting 8k
15199 for every single inactive connection_t. Free items from the
15200 4k/16k-buffer free lists when they haven't been used for a while.
15202 o Minor features (build):
15203 - Make autoconf search for libevent, openssl, and zlib consistently.
15204 - Update deprecated macros in configure.in.
15205 - When warning about missing headers, tell the user to let us
15206 know if the compile succeeds anyway, so we can downgrade the
15208 - Include the current subversion revision as part of the version
15209 string: either fetch it directly if we're in an SVN checkout, do
15210 some magic to guess it if we're in an SVK checkout, or use
15211 the last-detected version if we're building from a .tar.gz.
15212 Use this version consistently in log messages.
15214 o Minor features (logging):
15215 - Always prepend "Bug: " to any log message about a bug.
15216 - Put a platform string (e.g. "Linux i686") in the startup log
15217 message, so when people paste just their logs, we know if it's
15218 OpenBSD or Windows or what.
15219 - When logging memory usage, break down memory used in buffers by
15222 o Minor features (directory system):
15223 - New config option V2AuthoritativeDirectory that all directory
15224 authorities should set. This will let future authorities choose
15225 not to serve V2 directory information.
15226 - Directory authorities allow multiple router descriptors and/or extra
15227 info documents to be uploaded in a single go. This will make
15228 implementing proposal 104 simpler.
15230 o Minor features (controller):
15231 - Add a new config option __DisablePredictedCircuits designed for
15232 use by the controller, when we don't want Tor to build any circuits
15234 - Let the controller specify HOP=%d as an argument to ATTACHSTREAM,
15235 so we can exit from the middle of the circuit.
15236 - Implement "getinfo status/circuit-established".
15237 - Implement "getinfo status/version/..." so a controller can tell
15238 whether the current version is recommended, and whether any versions
15239 are good, and how many authorities agree. (Patch from shibz.)
15241 o Minor features (hidden services):
15242 - Allow multiple HiddenServicePort directives with the same virtual
15243 port; when they occur, the user is sent round-robin to one
15244 of the target ports chosen at random. Partially fixes bug 393 by
15245 adding limited ad-hoc round-robining.
15247 o Minor features (other):
15249 - Add a new AutomapHostsOnResolve option: when it is enabled, any
15250 resolve request for hosts matching a given pattern causes Tor to
15251 generate an internal virtual address mapping for that host. This
15252 allows DNSPort to work sensibly with hidden service users. By
15253 default, .exit and .onion addresses are remapped; the list of
15254 patterns can be reconfigured with AutomapHostsSuffixes.
15255 - Add an "-F" option to tor-resolve to force a resolve for a .onion
15256 address. Thanks to the AutomapHostsOnResolve option, this is no
15257 longer a completely silly thing to do.
15258 - If Tor is invoked from something that isn't a shell (e.g. Vidalia),
15259 now we expand "-f ~/.tor/torrc" correctly. Suggested by Matt Edman.
15260 - Treat "2gb" when given in torrc for a bandwidth as meaning 2gb,
15261 minus 1 byte: the actual maximum declared bandwidth.
15263 o Removed features:
15264 - Removed support for the old binary "version 0" controller protocol.
15265 This has been deprecated since 0.1.1, and warnings have been issued
15266 since 0.1.2. When we encounter a v0 control message, we now send
15267 back an error and close the connection.
15268 - Remove the old "dns worker" server DNS code: it hasn't been default
15269 since 0.1.2.2-alpha, and all the servers seem to be using the new
15272 o Minor bugfixes (portability):
15273 - Even though Windows is equally happy with / and \ as path separators,
15274 try to use \ consistently on Windows and / consistently on Unix: it
15275 makes the log messages nicer.
15276 - Correctly report platform name on Windows 95 OSR2 and Windows 98 SE.
15277 - Read resolv.conf files correctly on platforms where read() returns
15278 partial results on small file reads.
15280 o Minor bugfixes (directory):
15281 - Correctly enforce that elements of directory objects do not appear
15282 more often than they are allowed to appear.
15283 - When we are reporting the DirServer line we just parsed, we were
15284 logging the second stanza of the key fingerprint, not the first.
15286 o Minor bugfixes (logging):
15287 - When we hit an EOF on a log (probably because we're shutting down),
15288 don't try to remove the log from the list: just mark it as
15289 unusable. (Bulletproofs against bug 222.)
15291 o Minor bugfixes (other):
15292 - In the exitlist script, only consider the most recently published
15293 server descriptor for each server. Also, when the user requests
15294 a list of servers that _reject_ connections to a given address,
15295 explicitly exclude the IPs that also have servers that accept
15296 connections to that address. (Resolves bug 405.)
15297 - Stop allowing hibernating servers to be "stable" or "fast".
15298 - On Windows, we were preventing other processes from reading
15299 cached-routers while Tor was running. (Reported by janbar)
15300 - Make the NodeFamilies config option work. (Reported by
15301 lodger -- it has never actually worked, even though we added it
15303 - Check return values from pthread_mutex functions.
15304 - Don't save non-general-purpose router descriptors to the disk cache,
15305 because we have no way of remembering what their purpose was when
15307 - Add even more asserts to hunt down bug 417.
15308 - Build without verbose warnings even on (not-yet-released) gcc 4.2.
15309 - Fix a possible (but very unlikely) bug in picking routers by bandwidth.
15310 Add a log message to confirm that it is in fact unlikely.
15312 o Minor bugfixes (controller):
15313 - Make 'getinfo fingerprint' return a 551 error if we're not a
15314 server, so we match what the control spec claims we do. Reported
15316 - Fix a typo in an error message when extendcircuit fails that
15317 caused us to not follow the \r\n-based delimiter protocol. Reported
15320 o Code simplifications and refactoring:
15321 - Stop passing around circuit_t and crypt_path_t pointers that are
15322 implicit in other procedure arguments.
15323 - Drop the old code to choke directory connections when the
15324 corresponding OR connections got full: thanks to the cell queue
15325 feature, OR conns don't get full any more.
15326 - Make dns_resolve() handle attaching connections to circuits
15327 properly, so the caller doesn't have to.
15328 - Rename wants_to_read and wants_to_write to read/write_blocked_on_bw.
15329 - Keep the connection array as a dynamic smartlist_t, rather than as
15330 a fixed-sized array. This is important, as the number of connections
15331 is becoming increasingly decoupled from the number of sockets.
15334 Changes in version 0.1.2.14 - 2007-05-25
15335 Tor 0.1.2.14 changes the addresses of two directory authorities (this
15336 change especially affects those who serve or use hidden services),
15337 and fixes several other crash- and security-related bugs.
15339 o Directory authority changes:
15340 - Two directory authorities (moria1 and moria2) just moved to new
15341 IP addresses. This change will particularly affect those who serve
15342 or use hidden services.
15344 o Major bugfixes (crashes):
15345 - If a directory server runs out of space in the connection table
15346 as it's processing a begin_dir request, it will free the exit stream
15347 but leave it attached to the circuit, leading to unpredictable
15348 behavior. (Reported by seeess, fixes bug 425.)
15349 - Fix a bug in dirserv_remove_invalid() that would cause authorities
15350 to corrupt memory under some really unlikely scenarios.
15351 - Tighten router parsing rules. (Bugs reported by Benedikt Boss.)
15352 - Avoid segfaults when reading from mmaped descriptor file. (Reported
15355 o Major bugfixes (security):
15356 - When choosing an entry guard for a circuit, avoid using guards
15357 that are in the same family as the chosen exit -- not just guards
15358 that are exactly the chosen exit. (Reported by lodger.)
15360 o Major bugfixes (resource management):
15361 - If a directory authority is down, skip it when deciding where to get
15362 networkstatus objects or descriptors. Otherwise we keep asking
15363 every 10 seconds forever. Fixes bug 384.
15364 - Count it as a failure if we fetch a valid network-status but we
15365 don't want to keep it. Otherwise we'll keep fetching it and keep
15366 not wanting to keep it. Fixes part of bug 422.
15367 - If all of our dirservers have given us bad or no networkstatuses
15368 lately, then stop hammering them once per minute even when we
15369 think they're failed. Fixes another part of bug 422.
15372 - Actually set the purpose correctly for descriptors inserted with
15373 purpose=controller.
15374 - When we have k non-v2 authorities in our DirServer config,
15375 we ignored the last k authorities in the list when updating our
15377 - Correctly back-off from requesting router descriptors that we are
15378 having a hard time downloading.
15379 - Read resolv.conf files correctly on platforms where read() returns
15380 partial results on small file reads.
15381 - Don't rebuild the entire router store every time we get 32K of
15382 routers: rebuild it when the journal gets very large, or when
15383 the gaps in the store get very large.
15386 - When routers publish SVN revisions in their router descriptors,
15387 authorities now include those versions correctly in networkstatus
15389 - Warn when using a version of libevent before 1.3b to run a server on
15390 OSX or BSD: these versions interact badly with userspace threads.
15393 Changes in version 0.1.2.13 - 2007-04-24
15394 This release features some major anonymity fixes, such as safer path
15395 selection; better client performance; faster bootstrapping, better
15396 address detection, and better DNS support for servers; write limiting as
15397 well as read limiting to make servers easier to run; and a huge pile of
15398 other features and bug fixes. The bundles also ship with Vidalia 0.0.11.
15400 Tor 0.1.2.13 is released in memory of Rob Levin (1955-2006), aka lilo
15401 of the Freenode IRC network, remembering his patience and vision for
15402 free speech on the Internet.
15405 - Fix a memory leak when we ask for "all" networkstatuses and we
15406 get one we don't recognize.
15407 - Add more asserts to hunt down bug 417.
15408 - Disable kqueue on OS X 10.3 and earlier, to fix bug 371.
15411 Changes in version 0.1.2.12-rc - 2007-03-16
15413 - Fix an infinite loop introduced in 0.1.2.7-alpha when we serve
15414 directory information requested inside Tor connections (i.e. via
15415 begin_dir cells). It only triggered when the same connection was
15416 serving other data at the same time. Reported by seeess.
15419 - When creating a circuit via the controller, send a 'launched'
15420 event when we're done, so we follow the spec better.
15423 Changes in version 0.1.2.11-rc - 2007-03-15
15424 o Minor bugfixes (controller), reported by daejees:
15425 - Correct the control spec to match how the code actually responds
15426 to 'getinfo addr-mappings/*'.
15427 - The control spec described a GUARDS event, but the code
15428 implemented a GUARD event. Standardize on GUARD, but let people
15429 ask for GUARDS too.
15432 Changes in version 0.1.2.10-rc - 2007-03-07
15433 o Major bugfixes (Windows):
15434 - Do not load the NT services library functions (which may not exist)
15435 just to detect if we're a service trying to shut down. Now we run
15436 on Win98 and friends again.
15438 o Minor bugfixes (other):
15439 - Clarify a couple of log messages.
15440 - Fix a misleading socks5 error number.
15443 Changes in version 0.1.2.9-rc - 2007-03-02
15444 o Major bugfixes (Windows):
15445 - On MinGW, use "%I64u" to printf/scanf 64-bit integers, instead
15446 of the usual GCC "%llu". This prevents a bug when saving 64-bit
15447 int configuration values: the high-order 32 bits would get
15448 truncated. In particular, we were being bitten by the default
15449 MaxAdvertisedBandwidth of 128 TB turning into 0. (Fixes bug 400
15450 and maybe also bug 397.)
15452 o Minor bugfixes (performance):
15453 - Use OpenSSL's AES implementation on platforms where it's faster.
15454 This could save us as much as 10% CPU usage.
15456 o Minor bugfixes (server):
15457 - Do not rotate onion key immediately after setting it for the first
15460 o Minor bugfixes (directory authorities):
15461 - Stop calling servers that have been hibernating for a long time
15462 "stable". Also, stop letting hibernating or obsolete servers affect
15463 uptime and bandwidth cutoffs.
15464 - Stop listing hibernating servers in the v1 directory.
15466 o Minor bugfixes (hidden services):
15467 - Upload hidden service descriptors slightly less often, to reduce
15468 load on authorities.
15470 o Minor bugfixes (other):
15471 - Fix an assert that could trigger if a controller quickly set then
15472 cleared EntryNodes. Bug found by Udo van den Heuvel.
15473 - On architectures where sizeof(int)>4, still clamp declarable bandwidth
15475 - Fix a potential race condition in the rpm installer. Found by
15477 - Try to fix eventdns warnings once and for all: do not treat a dns rcode
15478 of 2 as indicating that the server is completely bad; it sometimes
15479 means that the server is just bad for the request in question. (may fix
15480 the last of bug 326.)
15481 - Disable encrypted directory connections when we don't have a server
15482 descriptor for the destination. We'll get this working again in
15486 Changes in version 0.1.2.8-beta - 2007-02-26
15487 o Major bugfixes (crashes):
15488 - Stop crashing when the controller asks us to resetconf more than
15489 one config option at once. (Vidalia 0.0.11 does this.)
15490 - Fix a crash that happened on Win98 when we're given command-line
15491 arguments: don't try to load NT service functions from advapi32.dll
15492 except when we need them. (Bug introduced in 0.1.2.7-alpha;
15494 - Fix a longstanding obscure crash bug that could occur when
15495 we run out of DNS worker processes. (Resolves bug 390.)
15497 o Major bugfixes (hidden services):
15498 - Correctly detect whether hidden service descriptor downloads are
15499 in-progress. (Suggested by Karsten Loesing; fixes bug 399.)
15501 o Major bugfixes (accounting):
15502 - When we start during an accounting interval before it's time to wake
15503 up, remember to wake up at the correct time. (May fix bug 342.)
15505 o Minor bugfixes (controller):
15506 - Give the controller END_STREAM_REASON_DESTROY events _before_ we
15507 clear the corresponding on_circuit variable, and remember later
15508 that we don't need to send a redundant CLOSED event. Resolves part
15510 - Report events where a resolve succeeded or where we got a socks
15511 protocol error correctly, rather than calling both of them
15513 - Change reported stream target addresses to IP consistently when
15514 we finally get the IP from an exit node.
15515 - Send log messages to the controller even if they happen to be very
15518 o Minor bugfixes (other):
15519 - Display correct results when reporting which versions are
15520 recommended, and how recommended they are. (Resolves bug 383.)
15521 - Improve our estimates for directory bandwidth to be less random:
15522 guess that an unrecognized directory will have the average bandwidth
15523 from all known directories, not that it will have the average
15524 bandwidth from those directories earlier than it on the list.
15525 - If we start a server with ClientOnly 1, then set ClientOnly to 0
15526 and hup, stop triggering an assert based on an empty onion_key.
15527 - On platforms with no working mmap() equivalent, don't warn the
15528 user when cached-routers doesn't exist.
15529 - Warn the user when mmap() [or its equivalent] fails for some reason
15530 other than file-not-found.
15531 - Don't warn the user when cached-routers.new doesn't exist: that's
15532 perfectly fine when starting up for the first time.
15533 - When EntryNodes are configured, rebuild the guard list to contain,
15534 in order: the EntryNodes that were guards before; the rest of the
15535 EntryNodes; the nodes that were guards before.
15536 - Mask out all signals in sub-threads; only the libevent signal
15537 handler should be processing them. This should prevent some crashes
15538 on some machines using pthreads. (Patch from coderman.)
15539 - Fix switched arguments on memset in the implementation of
15540 tor_munmap() for systems with no mmap() call.
15541 - When Tor receives a router descriptor that it asked for, but
15542 no longer wants (because it has received fresh networkstatuses
15543 in the meantime), do not warn the user. Cache the descriptor if
15544 we're a cache; drop it if we aren't.
15545 - Make earlier entry guards _really_ get retried when the network
15547 - On a malformed DNS reply, always give an error to the corresponding
15549 - Build with recent libevents on platforms that do not define the
15550 nonstandard types "u_int8_t" and friends.
15552 o Minor features (controller):
15553 - Warn the user when an application uses the obsolete binary v0
15554 control protocol. We're planning to remove support for it during
15555 the next development series, so it's good to give people some
15557 - Add STREAM_BW events to report per-entry-stream bandwidth
15558 use. (Patch from Robert Hogan.)
15559 - Rate-limit SIGNEWNYM signals in response to controllers that
15560 impolitely generate them for every single stream. (Patch from
15561 mwenge; closes bug 394.)
15562 - Make REMAP stream events have a SOURCE (cache or exit), and
15563 make them generated in every case where we get a successful
15564 connected or resolved cell.
15566 o Minor bugfixes (performance):
15567 - Call router_have_min_dir_info half as often. (This is showing up in
15568 some profiles, but not others.)
15569 - When using GCC, make log_debug never get called at all, and its
15570 arguments never get evaluated, when no debug logs are configured.
15571 (This is showing up in some profiles, but not others.)
15574 - Remove some never-implemented options. Mark PathlenCoinWeight as
15576 - Implement proposal 106: Stop requiring clients to have well-formed
15577 certificates; stop checking nicknames in certificates. (Clients
15578 have certificates so that they can look like Tor servers, but in
15579 the future we might want to allow them to look like regular TLS
15580 clients instead. Nicknames in certificates serve no purpose other
15581 than making our protocol easier to recognize on the wire.)
15582 - Revise messages on handshake failure again to be even more clear about
15583 which are incoming connections and which are outgoing.
15584 - Discard any v1 directory info that's over 1 month old (for
15585 directories) or over 1 week old (for running-routers lists).
15586 - Do not warn when individual nodes in the configuration's EntryNodes,
15587 ExitNodes, etc are down: warn only when all possible nodes
15588 are down. (Fixes bug 348.)
15589 - Always remove expired routers and networkstatus docs before checking
15590 whether we have enough information to build circuits. (Fixes
15592 - Put a lower-bound on MaxAdvertisedBandwidth.
15595 Changes in version 0.1.2.7-alpha - 2007-02-06
15596 o Major bugfixes (rate limiting):
15597 - Servers decline directory requests much more aggressively when
15598 they're low on bandwidth. Otherwise they end up queueing more and
15599 more directory responses, which can't be good for latency.
15600 - But never refuse directory requests from local addresses.
15601 - Fix a memory leak when sending a 503 response for a networkstatus
15603 - Be willing to read or write on local connections (e.g. controller
15604 connections) even when the global rate limiting buckets are empty.
15605 - If our system clock jumps back in time, don't publish a negative
15606 uptime in the descriptor. Also, don't let the global rate limiting
15607 buckets go absurdly negative.
15608 - Flush local controller connection buffers periodically as we're
15609 writing to them, so we avoid queueing 4+ megabytes of data before
15612 o Major bugfixes (NT services):
15613 - Install as NT_AUTHORITY\LocalService rather than as SYSTEM; add a
15614 command-line flag so that admins can override the default by saying
15615 "tor --service install --user "SomeUser"". This will not affect
15616 existing installed services. Also, warn the user that the service
15617 will look for its configuration file in the service user's
15618 %appdata% directory. (We can't do the 'hardwire the user's appdata
15619 directory' trick any more, since we may not have read access to that
15622 o Major bugfixes (other):
15623 - Previously, we would cache up to 16 old networkstatus documents
15624 indefinitely, if they came from nontrusted authorities. Now we
15625 discard them if they are more than 10 days old.
15626 - Fix a crash bug in the presence of DNS hijacking (reported by Andrew
15628 - Detect and reject malformed DNS responses containing circular
15630 - If exits are rare enough that we're not marking exits as guards,
15631 ignore exit bandwidth when we're deciding the required bandwidth
15633 - When we're handling a directory connection tunneled over Tor,
15634 don't fill up internal memory buffers with all the data we want
15635 to tunnel; instead, only add it if the OR connection that will
15636 eventually receive it has some room for it. (This can lead to
15637 slowdowns in tunneled dir connections; a better solution will have
15638 to wait for 0.2.0.)
15640 o Minor bugfixes (dns):
15641 - Add some defensive programming to eventdns.c in an attempt to catch
15642 possible memory-stomping bugs.
15643 - Detect and reject DNS replies containing IPv4 or IPv6 records with
15644 an incorrect number of bytes. (Previously, we would ignore the
15646 - Fix as-yet-unused reverse IPv6 lookup code so it sends nybbles
15647 in the correct order, and doesn't crash.
15648 - Free memory held in recently-completed DNS lookup attempts on exit.
15649 This was not a memory leak, but may have been hiding memory leaks.
15650 - Handle TTL values correctly on reverse DNS lookups.
15651 - Treat failure to parse resolv.conf as an error.
15653 o Minor bugfixes (other):
15654 - Fix crash with "tor --list-fingerprint" (reported by seeess).
15655 - When computing clock skew from directory HTTP headers, consider what
15656 time it was when we finished asking for the directory, not what
15658 - Expire socks connections if they spend too long waiting for the
15659 handshake to finish. Previously we would let them sit around for
15660 days, if the connecting application didn't close them either.
15661 - And if the socks handshake hasn't started, don't send a
15662 "DNS resolve socks failed" handshake reply; just close it.
15663 - Stop using C functions that OpenBSD's linker doesn't like.
15664 - Don't launch requests for descriptors unless we have networkstatuses
15665 from at least half of the authorities. This delays the first
15666 download slightly under pathological circumstances, but can prevent
15667 us from downloading a bunch of descriptors we don't need.
15668 - Do not log IPs with TLS failures for incoming TLS
15669 connections. (Fixes bug 382.)
15670 - If the user asks to use invalid exit nodes, be willing to use
15672 - Stop using the reserved ac_cv namespace in our configure script.
15673 - Call stat() slightly less often; use fstat() when possible.
15674 - Refactor the way we handle pending circuits when an OR connection
15675 completes or fails, in an attempt to fix a rare crash bug.
15676 - Only rewrite a conn's address based on X-Forwarded-For: headers
15677 if it's a parseable public IP address; and stop adding extra quotes
15678 to the resulting address.
15681 - Weight directory requests by advertised bandwidth. Now we can
15682 let servers enable write limiting but still allow most clients to
15683 succeed at their directory requests. (We still ignore weights when
15684 choosing a directory authority; I hope this is a feature.)
15687 - Create a new file ReleaseNotes which was the old ChangeLog. The
15688 new ChangeLog file now includes the summaries for all development
15690 - Check for addresses with invalid characters at the exit as well
15691 as at the client, and warn less verbosely when they fail. You can
15692 override this by setting ServerDNSAllowNonRFC953Addresses to 1.
15693 - Adapt a patch from goodell to let the contrib/exitlist script
15694 take arguments rather than require direct editing.
15695 - Inform the server operator when we decide not to advertise a
15696 DirPort due to AccountingMax enabled or a low BandwidthRate. It
15697 was confusing Zax, so now we're hopefully more helpful.
15698 - Bring us one step closer to being able to establish an encrypted
15699 directory tunnel without knowing a descriptor first. Still not
15700 ready yet. As part of the change, now assume we can use a
15701 create_fast cell if we don't know anything about a router.
15702 - Allow exit nodes to use nameservers running on ports other than 53.
15703 - Servers now cache reverse DNS replies.
15704 - Add an --ignore-missing-torrc command-line option so that we can
15705 get the "use sensible defaults if the configuration file doesn't
15706 exist" behavior even when specifying a torrc location on the command
15709 o Minor features (controller):
15710 - Track reasons for OR connection failure; make these reasons
15711 available via the controller interface. (Patch from Mike Perry.)
15712 - Add a SOCKS_BAD_HOSTNAME client status event so controllers
15713 can learn when clients are sending malformed hostnames to Tor.
15714 - Clean up documentation for controller status events.
15715 - Add a REMAP status to stream events to note that a stream's
15716 address has changed because of a cached address or a MapAddress
15720 Changes in version 0.1.2.6-alpha - 2007-01-09
15722 - Fix an assert error introduced in 0.1.2.5-alpha: if a single TLS
15723 connection handles more than 4 gigs in either direction, we crash.
15724 - Fix an assert error introduced in 0.1.2.5-alpha: if we're an
15725 advertised exit node, somebody might try to exit from us when
15726 we're bootstrapping and before we've built our descriptor yet.
15727 Refuse the connection rather than crashing.
15730 - Warn if we (as a server) find that we've resolved an address that we
15731 weren't planning to resolve.
15732 - Warn that using select() on any libevent version before 1.1 will be
15733 unnecessarily slow (even for select()).
15734 - Flush ERR-level controller status events just like we currently
15735 flush ERR-level log events, so that a Tor shutdown doesn't prevent
15736 the controller from learning about current events.
15738 o Minor features (more controller status events):
15739 - Implement EXTERNAL_ADDRESS server status event so controllers can
15740 learn when our address changes.
15741 - Implement BAD_SERVER_DESCRIPTOR server status event so controllers
15742 can learn when directories reject our descriptor.
15743 - Implement SOCKS_UNKNOWN_PROTOCOL client status event so controllers
15744 can learn when a client application is speaking a non-socks protocol
15746 - Implement DANGEROUS_SOCKS client status event so controllers
15747 can learn when a client application is leaking DNS addresses.
15748 - Implement BUG general status event so controllers can learn when
15749 Tor is unhappy about its internal invariants.
15750 - Implement CLOCK_SKEW general status event so controllers can learn
15751 when Tor thinks the system clock is set incorrectly.
15752 - Implement GOOD_SERVER_DESCRIPTOR and ACCEPTED_SERVER_DESCRIPTOR
15753 server status events so controllers can learn when their descriptors
15754 are accepted by a directory.
15755 - Implement CHECKING_REACHABILITY and REACHABILITY_{SUCCEEDED|FAILED}
15756 server status events so controllers can learn about Tor's progress in
15757 deciding whether it's reachable from the outside.
15758 - Implement BAD_LIBEVENT general status event so controllers can learn
15759 when we have a version/method combination in libevent that needs to
15761 - Implement NAMESERVER_STATUS, NAMESERVER_ALL_DOWN, DNS_HIJACKED,
15762 and DNS_USELESS server status events so controllers can learn
15763 about changes to DNS server status.
15765 o Minor features (directory):
15766 - Authorities no longer recommend exits as guards if this would shift
15767 too much load to the exit nodes.
15770 Changes in version 0.1.2.5-alpha - 2007-01-06
15772 - Enable write limiting as well as read limiting. Now we sacrifice
15773 capacity if we're pushing out lots of directory traffic, rather
15774 than overrunning the user's intended bandwidth limits.
15775 - Include TLS overhead when counting bandwidth usage; previously, we
15776 would count only the bytes sent over TLS, but not the bytes used
15778 - Support running the Tor service with a torrc not in the same
15779 directory as tor.exe and default to using the torrc located in
15780 the %appdata%\Tor\ of the user who installed the service. Patch
15782 - Servers now check for the case when common DNS requests are going to
15783 wildcarded addresses (i.e. all getting the same answer), and change
15784 their exit policy to reject *:* if it's happening.
15785 - Implement BEGIN_DIR cells, so we can connect to the directory
15786 server via TLS to do encrypted directory requests rather than
15787 plaintext. Enable via the TunnelDirConns and PreferTunneledDirConns
15788 config options if you like.
15790 o Minor features (config and docs):
15791 - Start using the state file to store bandwidth accounting data:
15792 the bw_accounting file is now obsolete. We'll keep generating it
15793 for a while for people who are still using 0.1.2.4-alpha.
15794 - Try to batch changes to the state file so that we do as few
15795 disk writes as possible while still storing important things in
15797 - The state file and the bw_accounting file get saved less often when
15798 the AvoidDiskWrites config option is set.
15799 - Make PIDFile work on Windows (untested).
15800 - Add internal descriptions for a bunch of configuration options:
15801 accessible via controller interface and in comments in saved
15803 - Reject *:563 (NNTPS) in the default exit policy. We already reject
15804 NNTP by default, so this seems like a sensible addition.
15805 - Clients now reject hostnames with invalid characters. This should
15806 avoid some inadvertent info leaks. Add an option
15807 AllowNonRFC953Hostnames to disable this behavior, in case somebody
15808 is running a private network with hosts called @, !, and #.
15809 - Add a maintainer script to tell us which options are missing
15810 documentation: "make check-docs".
15811 - Add a new address-spec.txt document to describe our special-case
15812 addresses: .exit, .onion, and .noconnnect.
15814 o Minor features (DNS):
15815 - Ongoing work on eventdns infrastructure: now it has dns server
15816 and ipv6 support. One day Tor will make use of it.
15817 - Add client-side caching for reverse DNS lookups.
15818 - Add support to tor-resolve tool for reverse lookups and SOCKS5.
15819 - When we change nameservers or IP addresses, reset and re-launch
15820 our tests for DNS hijacking.
15822 o Minor features (directory):
15823 - Authorities now specify server versions in networkstatus. This adds
15824 about 2% to the size of compressed networkstatus docs, and allows
15825 clients to tell which servers support BEGIN_DIR and which don't.
15826 The implementation is forward-compatible with a proposed future
15827 protocol version scheme not tied to Tor versions.
15828 - DirServer configuration lines now have an orport= option so
15829 clients can open encrypted tunnels to the authorities without
15830 having downloaded their descriptors yet. Enabled for moria1,
15831 moria2, tor26, and lefkada now in the default configuration.
15832 - Directory servers are more willing to send a 503 "busy" if they
15833 are near their write limit, especially for v1 directory requests.
15834 Now they can use their limited bandwidth for actual Tor traffic.
15835 - Clients track responses with status 503 from dirservers. After a
15836 dirserver has given us a 503, we try not to use it until an hour has
15837 gone by, or until we have no dirservers that haven't given us a 503.
15838 - When we get a 503 from a directory, and we're not a server, we don't
15839 count the failure against the total number of failures allowed
15840 for the thing we're trying to download.
15841 - Report X-Your-Address-Is correctly from tunneled directory
15842 connections; don't report X-Your-Address-Is when it's an internal
15843 address; and never believe reported remote addresses when they're
15845 - Protect against an unlikely DoS attack on directory servers.
15846 - Add a BadDirectory flag to network status docs so that authorities
15847 can (eventually) tell clients about caches they believe to be
15850 o Minor features (controller):
15851 - Have GETINFO dir/status/* work on hosts with DirPort disabled.
15852 - Reimplement GETINFO so that info/names stays in sync with the
15854 - Implement "GETINFO fingerprint".
15855 - Implement "SETEVENTS GUARD" so controllers can get updates on
15856 entry guard status as it changes.
15858 o Minor features (clean up obsolete pieces):
15859 - Remove some options that have been deprecated since at least
15860 0.1.0.x: AccountingMaxKB, LogFile, DebugLogFile, LogLevel, and
15861 SysLog. Use AccountingMax instead of AccountingMaxKB, and use Log
15862 to set log options.
15863 - We no longer look for identity and onion keys in "identity.key" and
15864 "onion.key" -- these were replaced by secret_id_key and
15865 secret_onion_key in 0.0.8pre1.
15866 - We no longer require unrecognized directory entries to be
15869 o Major bugfixes (security):
15870 - Stop sending the HttpProxyAuthenticator string to directory
15871 servers when directory connections are tunnelled through Tor.
15872 - Clients no longer store bandwidth history in the state file.
15873 - Do not log introduction points for hidden services if SafeLogging
15875 - When generating bandwidth history, round down to the nearest
15876 1k. When storing accounting data, round up to the nearest 1k.
15877 - When we're running as a server, remember when we last rotated onion
15878 keys, so that we will rotate keys once they're a week old even if
15879 we never stay up for a week ourselves.
15881 o Major bugfixes (other):
15882 - Fix a longstanding bug in eventdns that prevented the count of
15883 timed-out resolves from ever being reset. This bug caused us to
15884 give up on a nameserver the third time it timed out, and try it
15885 10 seconds later... and to give up on it every time it timed out
15887 - Take out the '5 second' timeout from the connection retry
15888 schedule. Now the first connect attempt will wait a full 10
15889 seconds before switching to a new circuit. Perhaps this will help
15890 a lot. Based on observations from Mike Perry.
15891 - Fix a bug on the Windows implementation of tor_mmap_file() that
15892 would prevent the cached-routers file from ever loading. Reported
15896 - Fix an assert failure when a directory authority sets
15897 AuthDirRejectUnlisted and then receives a descriptor from an
15898 unlisted router. Reported by seeess.
15899 - Avoid a double-free when parsing malformed DirServer lines.
15900 - Fix a bug when a BSD-style PF socket is first used. Patch from
15902 - Fix a bug in 0.1.2.2-alpha that prevented clients from asking
15903 to resolve an address at a given exit node even when they ask for
15905 - Servers no longer ever list themselves in their "family" line,
15906 even if configured to do so. This makes it easier to configure
15907 family lists conveniently.
15908 - When running as a server, don't fall back to 127.0.0.1 when no
15909 nameservers are configured in /etc/resolv.conf; instead, make the
15910 user fix resolv.conf or specify nameservers explicitly. (Resolves
15912 - Stop accepting certain malformed ports in configured exit policies.
15913 - Don't re-write the fingerprint file every restart, unless it has
15915 - Stop warning when a single nameserver fails: only warn when _all_ of
15916 our nameservers have failed. Also, when we only have one nameserver,
15917 raise the threshold for deciding that the nameserver is dead.
15918 - Directory authorities now only decide that routers are reachable
15919 if their identity keys are as expected.
15920 - When the user uses bad syntax in the Log config line, stop
15921 suggesting other bad syntax as a replacement.
15922 - Correctly detect ipv6 DNS capability on OpenBSD.
15924 o Minor bugfixes (controller):
15925 - Report the circuit number correctly in STREAM CLOSED events. Bug
15926 reported by Mike Perry.
15927 - Do not report bizarre values for results of accounting GETINFOs
15928 when the last second's write or read exceeds the allotted bandwidth.
15929 - Report "unrecognized key" rather than an empty string when the
15930 controller tries to fetch a networkstatus that doesn't exist.
15933 Changes in version 0.1.1.26 - 2006-12-14
15934 o Security bugfixes:
15935 - Stop sending the HttpProxyAuthenticator string to directory
15936 servers when directory connections are tunnelled through Tor.
15937 - Clients no longer store bandwidth history in the state file.
15938 - Do not log introduction points for hidden services if SafeLogging
15942 - Fix an assert failure when a directory authority sets
15943 AuthDirRejectUnlisted and then receives a descriptor from an
15944 unlisted router (reported by seeess).
15947 Changes in version 0.1.2.4-alpha - 2006-12-03
15949 - Add support for using natd; this allows FreeBSDs earlier than
15950 5.1.2 to have ipfw send connections through Tor without using
15951 SOCKS. (Patch from Zajcev Evgeny with tweaks from tup.)
15954 - Make all connections to addresses of the form ".noconnect"
15955 immediately get closed. This lets application/controller combos
15956 successfully test whether they're talking to the same Tor by
15957 watching for STREAM events.
15958 - Make cross.sh cross-compilation script work even when autogen.sh
15959 hasn't been run. (Patch from Michael Mohr.)
15960 - Statistics dumped by -USR2 now include a breakdown of public key
15961 operations, for profiling.
15964 - Fix a major leak when directory authorities parse their
15965 approved-routers list, a minor memory leak when we fail to pick
15966 an exit node, and a few rare leaks on errors.
15967 - Handle TransPort connections even when the server sends data before
15968 the client sends data. Previously, the connection would just hang
15969 until the client sent data. (Patch from tup based on patch from
15971 - Avoid assert failure when our cached-routers file is empty on
15975 - Don't log spurious warnings when we see a circuit close reason we
15976 don't recognize; it's probably just from a newer version of Tor.
15977 - Have directory authorities allow larger amounts of drift in uptime
15978 without replacing the server descriptor: previously, a server that
15979 restarted every 30 minutes could have 48 "interesting" descriptors
15981 - Start linking to the Tor specification and Tor reference manual
15982 correctly in the Windows installer.
15983 - Add Vidalia to the OS X uninstaller script, so when we uninstall
15984 Tor/Privoxy we also uninstall Vidalia.
15985 - Resume building on Irix64, and fix a lot of warnings from its
15986 MIPSpro C compiler.
15987 - Don't corrupt last_guessed_ip in router_new_address_suggestion()
15988 when we're running as a client.
15991 Changes in version 0.1.1.25 - 2006-11-04
15993 - When a client asks us to resolve (rather than connect to)
15994 an address, and we have a cached answer, give them the cached
15995 answer. Previously, we would give them no answer at all.
15996 - We were building exactly the wrong circuits when we predict
15997 hidden service requirements, meaning Tor would have to build all
15998 its circuits on demand.
15999 - If none of our live entry guards have a high uptime, but we
16000 require a guard with a high uptime, try adding a new guard before
16001 we give up on the requirement. This patch should make long-lived
16002 connections more stable on average.
16003 - When testing reachability of our DirPort, don't launch new
16004 tests when there's already one in progress -- unreachable
16005 servers were stacking up dozens of testing streams.
16007 o Security bugfixes:
16008 - When the user sends a NEWNYM signal, clear the client-side DNS
16009 cache too. Otherwise we continue to act on previous information.
16012 - Avoid a memory corruption bug when creating a hash table for
16014 - Avoid possibility of controller-triggered crash when misusing
16015 certain commands from a v0 controller on platforms that do not
16016 handle printf("%s",NULL) gracefully.
16017 - Avoid infinite loop on unexpected controller input.
16018 - Don't log spurious warnings when we see a circuit close reason we
16019 don't recognize; it's probably just from a newer version of Tor.
16020 - Add Vidalia to the OS X uninstaller script, so when we uninstall
16021 Tor/Privoxy we also uninstall Vidalia.
16024 Changes in version 0.1.2.3-alpha - 2006-10-29
16026 - Prepare for servers to publish descriptors less often: never
16027 discard a descriptor simply for being too old until either it is
16028 recommended by no authorities, or until we get a better one for
16029 the same router. Make caches consider retaining old recommended
16030 routers for even longer.
16031 - If most authorities set a BadExit flag for a server, clients
16032 don't think of it as a general-purpose exit. Clients only consider
16033 authorities that advertise themselves as listing bad exits.
16034 - Directory servers now provide 'Pragma: no-cache' and 'Expires'
16035 headers for content, so that we can work better in the presence of
16036 caching HTTP proxies.
16037 - Allow authorities to list nodes as bad exits by fingerprint or by
16040 o Minor features, controller:
16041 - Add a REASON field to CIRC events; for backward compatibility, this
16042 field is sent only to controllers that have enabled the extended
16043 event format. Also, add additional reason codes to explain why
16044 a given circuit has been destroyed or truncated. (Patches from
16046 - Add a REMOTE_REASON field to extended CIRC events to tell the
16047 controller about why a remote OR told us to close a circuit.
16048 - Stream events also now have REASON and REMOTE_REASON fields,
16049 working much like those for circuit events.
16050 - There's now a GETINFO ns/... field so that controllers can ask Tor
16051 about the current status of a router.
16052 - A new event type "NS" to inform a controller when our opinion of
16053 a router's status has changed.
16054 - Add a GETINFO events/names and GETINFO features/names so controllers
16055 can tell which events and features are supported.
16056 - A new CLEARDNSCACHE signal to allow controllers to clear the
16057 client-side DNS cache without expiring circuits.
16059 o Security bugfixes:
16060 - When the user sends a NEWNYM signal, clear the client-side DNS
16061 cache too. Otherwise we continue to act on previous information.
16064 - Avoid sending junk to controllers or segfaulting when a controller
16065 uses EVENT_NEW_DESC with verbose nicknames.
16066 - Stop triggering asserts if the controller tries to extend hidden
16067 service circuits (reported by mwenge).
16068 - Avoid infinite loop on unexpected controller input.
16069 - When the controller does a "GETINFO network-status", tell it
16070 about even those routers whose descriptors are very old, and use
16071 long nicknames where appropriate.
16072 - Change NT service functions to be loaded on demand. This lets us
16073 build with MinGW without breaking Tor for Windows 98 users.
16074 - Do DirPort reachability tests less often, since a single test
16075 chews through many circuits before giving up.
16076 - In the hidden service example in torrc.sample, stop recommending
16077 esoteric and discouraged hidden service options.
16078 - When stopping an NT service, wait up to 10 sec for it to actually
16079 stop. Patch from Matt Edman; resolves bug 295.
16080 - Fix handling of verbose nicknames with ORCONN controller events:
16081 make them show up exactly when requested, rather than exactly when
16083 - When reporting verbose nicknames in entry_guards_getinfo(), avoid
16084 printing a duplicate "$" in the keys we send (reported by mwenge).
16085 - Correctly set maximum connection limit on Cygwin. (This time
16087 - Try to detect Windows correctly when cross-compiling.
16088 - Detect the size of the routers file correctly even if it is
16089 corrupted (on systems without mmap) or not page-aligned (on systems
16090 with mmap). This bug was harmless.
16091 - Sometimes we didn't bother sending a RELAY_END cell when an attempt
16092 to open a stream fails; now we do in more cases. This should
16093 make clients able to find a good exit faster in some cases, since
16094 unhandleable requests will now get an error rather than timing out.
16095 - Resolve two memory leaks when rebuilding the on-disk router cache
16096 (reported by fookoowa).
16097 - Clean up minor code warnings suggested by the MIPSpro C compiler,
16098 and reported by some Centos users.
16099 - Controller signals now work on non-Unix platforms that don't define
16100 SIGUSR1 and SIGUSR2 the way we expect.
16101 - Patch from Michael Mohr to contrib/cross.sh, so it checks more
16102 values before failing, and always enables eventdns.
16103 - Libevent-1.2 exports, but does not define in its headers, strlcpy.
16104 Try to fix this in configure.in by checking for most functions
16105 before we check for libevent.
16108 Changes in version 0.1.2.2-alpha - 2006-10-07
16110 - Make our async eventdns library on-by-default for Tor servers,
16111 and plan to deprecate the separate dnsworker threads.
16112 - Add server-side support for "reverse" DNS lookups (using PTR
16113 records so clients can determine the canonical hostname for a given
16114 IPv4 address). Only supported by servers using eventdns; servers
16115 now announce in their descriptors whether they support eventdns.
16116 - Specify and implement client-side SOCKS5 interface for reverse DNS
16117 lookups (see doc/socks-extensions.txt).
16118 - Add a BEGIN_DIR relay cell type for an easier in-protocol way to
16119 connect to directory servers through Tor. Previously, clients needed
16120 to find Tor exits to make private connections to directory servers.
16121 - Avoid choosing Exit nodes for entry or middle hops when the
16122 total bandwidth available from non-Exit nodes is much higher than
16123 the total bandwidth available from Exit nodes.
16124 - Workaround for name servers (like Earthlink's) that hijack failing
16125 DNS requests and replace the no-such-server answer with a "helpful"
16126 redirect to an advertising-driven search portal. Also work around
16127 DNS hijackers who "helpfully" decline to hijack known-invalid
16128 RFC2606 addresses. Config option "ServerDNSDetectHijacking 0"
16129 lets you turn it off.
16130 - Send out a burst of long-range padding cells once we've established
16131 that we're reachable. Spread them over 4 circuits, so hopefully
16132 a few will be fast. This exercises our bandwidth and bootstraps
16133 us into the directory more quickly.
16135 o New/improved config options:
16136 - Add new config option "ResolvConf" to let the server operator
16137 choose an alternate resolve.conf file when using eventdns.
16138 - Add an "EnforceDistinctSubnets" option to control our "exclude
16139 servers on the same /16" behavior. It's still on by default; this
16140 is mostly for people who want to operate private test networks with
16141 all the machines on the same subnet.
16142 - If one of our entry guards is on the ExcludeNodes list, or the
16143 directory authorities don't think it's a good guard, treat it as
16144 if it were unlisted: stop using it as a guard, and throw it off
16145 the guards list if it stays that way for a long time.
16146 - Allow directory authorities to be marked separately as authorities
16147 for the v1 directory protocol, the v2 directory protocol, and
16148 as hidden service directories, to make it easier to retire old
16149 authorities. V1 authorities should set "HSAuthoritativeDir 1"
16150 to continue being hidden service authorities too.
16151 - Remove 8888 as a LongLivedPort, and add 6697 (IRCS).
16153 o Minor features, controller:
16154 - Fix CIRC controller events so that controllers can learn the
16155 identity digests of non-Named servers used in circuit paths.
16156 - Let controllers ask for more useful identifiers for servers. Instead
16157 of learning identity digests for un-Named servers and nicknames
16158 for Named servers, the new identifiers include digest, nickname,
16159 and indication of Named status. Off by default; see control-spec.txt
16160 for more information.
16161 - Add a "getinfo address" controller command so it can display Tor's
16162 best guess to the user.
16163 - New controller event to alert the controller when our server
16164 descriptor has changed.
16165 - Give more meaningful errors on controller authentication failure.
16167 o Minor features, other:
16168 - When asked to resolve a hostname, don't use non-exit servers unless
16169 requested to do so. This allows servers with broken DNS to be
16170 useful to the network.
16171 - Divide eventdns log messages into warn and info messages.
16172 - Reserve the nickname "Unnamed" for routers that can't pick
16173 a hostname: any router can call itself Unnamed; directory
16174 authorities will never allocate Unnamed to any particular router;
16175 clients won't believe that any router is the canonical Unnamed.
16176 - Only include function names in log messages for info/debug messages.
16177 For notice/warn/err, the content of the message should be clear on
16178 its own, and printing the function name only confuses users.
16179 - Avoid some false positives during reachability testing: don't try
16180 to test via a server that's on the same /24 as us.
16181 - If we fail to build a circuit to an intended enclave, and it's
16182 not mandatory that we use that enclave, stop wanting it.
16183 - When eventdns is enabled, allow multithreaded builds on NetBSD and
16184 OpenBSD. (We had previously disabled threads on these platforms
16185 because they didn't have working thread-safe resolver functions.)
16187 o Major bugfixes, anonymity/security:
16188 - If a client asked for a server by name, and there's a named server
16189 in our network-status but we don't have its descriptor yet, we
16190 could return an unnamed server instead.
16191 - Fix NetBSD bug that could allow someone to force uninitialized RAM
16192 to be sent to a server's DNS resolver. This only affects NetBSD
16193 and other platforms that do not bounds-check tolower().
16194 - Reject (most) attempts to use Tor circuits with length one. (If
16195 many people start using Tor as a one-hop proxy, exit nodes become
16196 a more attractive target for compromise.)
16197 - Just because your DirPort is open doesn't mean people should be
16198 able to remotely teach you about hidden service descriptors. Now
16199 only accept rendezvous posts if you've got HSAuthoritativeDir set.
16201 o Major bugfixes, other:
16202 - Don't crash on race condition in dns.c: tor_assert(!resolve->expire)
16203 - When a client asks the server to resolve (not connect to)
16204 an address, and it has a cached answer, give them the cached answer.
16205 Previously, the server would give them no answer at all.
16206 - Allow really slow clients to not hang up five minutes into their
16207 directory downloads (suggested by Adam J. Richter).
16208 - We were building exactly the wrong circuits when we anticipated
16209 hidden service requirements, meaning Tor would have to build all
16210 its circuits on demand.
16211 - Avoid crashing when we mmap a router cache file of size 0.
16212 - When testing reachability of our DirPort, don't launch new
16213 tests when there's already one in progress -- unreachable
16214 servers were stacking up dozens of testing streams.
16216 o Minor bugfixes, correctness:
16217 - If we're a directory mirror and we ask for "all" network status
16218 documents, we would discard status documents from authorities
16219 we don't recognize.
16220 - Avoid a memory corruption bug when creating a hash table for
16222 - Avoid controller-triggered crash when misusing certain commands
16223 from a v0 controller on platforms that do not handle
16224 printf("%s",NULL) gracefully.
16225 - Don't crash when a controller sends a third argument to an
16226 "extendcircuit" request.
16227 - Controller protocol fixes: fix encoding in "getinfo addr-mappings"
16228 response; fix error code when "getinfo dir/status/" fails.
16229 - Avoid crash when telling controller stream-status and a stream
16231 - Patch from Adam Langley to fix assert() in eventdns.c.
16232 - Fix a debug log message in eventdns to say "X resolved to Y"
16233 instead of "X resolved to X".
16234 - Make eventdns give strings for DNS errors, not just error numbers.
16235 - Track unreachable entry guards correctly: don't conflate
16236 'unreachable by us right now' with 'listed as down by the directory
16237 authorities'. With the old code, if a guard was unreachable by
16238 us but listed as running, it would clog our guard list forever.
16239 - Behave correctly in case we ever have a network with more than
16240 2GB/s total advertised capacity.
16241 - Make TrackExitHosts case-insensitive, and fix the behavior of
16242 ".suffix" TrackExitHosts items to avoid matching in the middle of
16244 - Finally fix the openssl warnings from newer gccs that believe that
16245 ignoring a return value is okay, but casting a return value and
16246 then ignoring it is a sign of madness.
16247 - Prevent the contrib/exitlist script from printing the same
16248 result more than once.
16249 - Patch from Steve Hildrey: Generate network status correctly on
16250 non-versioning dirservers.
16251 - Don't listen to the X-Your-Address-Is hint if you did the lookup
16252 via Tor; otherwise you'll think you're the exit node's IP address.
16254 o Minor bugfixes, performance:
16255 - Two small performance improvements on parsing descriptors.
16256 - Major performance improvement on inserting descriptors: change
16257 algorithm from O(n^2) to O(n).
16258 - Make the common memory allocation path faster on machines where
16259 malloc(0) returns a pointer.
16260 - Start remembering X-Your-Address-Is directory hints even if you're
16261 a client, so you can become a server more smoothly.
16262 - Avoid duplicate entries on MyFamily line in server descriptor.
16264 o Packaging, features:
16265 - Remove architecture from OS X builds. The official builds are
16266 now universal binaries.
16267 - The Debian package now uses --verify-config when (re)starting,
16268 to distinguish configuration errors from other errors.
16269 - Update RPMs to require libevent 1.1b.
16271 o Packaging, bugfixes:
16272 - Patches so Tor builds with MinGW on Windows.
16273 - Patches so Tor might run on Cygwin again.
16274 - Resume building on non-gcc compilers and ancient gcc. Resume
16275 building with the -O0 compile flag. Resume building cleanly on
16277 - Run correctly on OS X platforms with case-sensitive filesystems.
16278 - Correct includes for net/if.h and net/pfvar.h on OpenBSD (from Tup).
16279 - Add autoconf checks so Tor can build on Solaris x86 again.
16282 - Documented (and renamed) ServerDNSSearchDomains and
16283 ServerDNSResolvConfFile options.
16284 - Be clearer that the *ListenAddress directives can be repeated
16288 Changes in version 0.1.1.24 - 2006-09-29
16290 - Allow really slow clients to not hang up five minutes into their
16291 directory downloads (suggested by Adam J. Richter).
16292 - Fix major performance regression from 0.1.0.x: instead of checking
16293 whether we have enough directory information every time we want to
16294 do something, only check when the directory information has changed.
16295 This should improve client CPU usage by 25-50%.
16296 - Don't crash if, after a server has been running for a while,
16297 it can't resolve its hostname.
16300 - Allow Tor to start when RunAsDaemon is set but no logs are set.
16301 - Don't crash when the controller receives a third argument to an
16302 "extendcircuit" request.
16303 - Controller protocol fixes: fix encoding in "getinfo addr-mappings"
16304 response; fix error code when "getinfo dir/status/" fails.
16305 - Fix configure.in to not produce broken configure files with
16306 more recent versions of autoconf. Thanks to Clint for his auto*
16308 - Fix security bug on NetBSD that could allow someone to force
16309 uninitialized RAM to be sent to a server's DNS resolver. This
16310 only affects NetBSD and other platforms that do not bounds-check
16312 - Warn user when using libevent 1.1a or earlier with win32 or kqueue
16313 methods: these are known to be buggy.
16314 - If we're a directory mirror and we ask for "all" network status
16315 documents, we would discard status documents from authorities
16316 we don't recognize.
16319 Changes in version 0.1.2.1-alpha - 2006-08-27
16321 - Add "eventdns" async dns library from Adam Langley, tweaked to
16322 build on OSX and Windows. Only enabled if you pass the
16323 --enable-eventdns argument to configure.
16324 - Allow servers with no hostname or IP address to learn their
16325 IP address by asking the directory authorities. This code only
16326 kicks in when you would normally have exited with a "no address"
16327 error. Nothing's authenticated, so use with care.
16328 - Rather than waiting a fixed amount of time between retrying
16329 application connections, we wait only 5 seconds for the first,
16330 10 seconds for the second, and 15 seconds for each retry after
16331 that. Hopefully this will improve the expected user experience.
16332 - Patch from Tup to add support for transparent AP connections:
16333 this basically bundles the functionality of trans-proxy-tor
16334 into the Tor mainline. Now hosts with compliant pf/netfilter
16335 implementations can redirect TCP connections straight to Tor
16336 without diverting through SOCKS. Needs docs.
16337 - Busy directory servers save lots of memory by spooling server
16338 descriptors, v1 directories, and v2 networkstatus docs to buffers
16339 as needed rather than en masse. Also mmap the cached-routers
16340 files, so we don't need to keep the whole thing in memory too.
16341 - Automatically avoid picking more than one node from the same
16342 /16 network when constructing a circuit.
16343 - Revise and clean up the torrc.sample that we ship with; add
16344 a section for BandwidthRate and BandwidthBurst.
16347 - Split circuit_t into origin_circuit_t and or_circuit_t, and
16348 split connection_t into edge, or, dir, control, and base structs.
16349 These will save quite a bit of memory on busy servers, and they'll
16350 also help us track down bugs in the code and bugs in the spec.
16351 - Experimentally re-enable kqueue on OSX when using libevent 1.1b
16352 or later. Log when we are doing this, so we can diagnose it when
16353 it fails. (Also, recommend libevent 1.1b for kqueue and
16354 win32 methods; deprecate libevent 1.0b harder; make libevent
16355 recommendation system saner.)
16356 - Start being able to build universal binaries on OS X (thanks
16358 - Export the default exit policy via the control port, so controllers
16359 don't need to guess what it is / will be later.
16360 - Add a man page entry for ProtocolWarnings.
16361 - Add TestVia config option to the man page.
16362 - Remove even more protocol-related warnings from Tor server logs,
16363 such as bad TLS handshakes and malformed begin cells.
16364 - Stop fetching descriptors if you're not a dir mirror and you
16365 haven't tried to establish any circuits lately. [This currently
16366 causes some dangerous behavior, because when you start up again
16367 you'll use your ancient server descriptors.]
16368 - New DirPort behavior: if you have your dirport set, you download
16369 descriptors aggressively like a directory mirror, whether or not
16370 your ORPort is set.
16371 - Get rid of the router_retry_connections notion. Now routers
16372 no longer try to rebuild long-term connections to directory
16373 authorities, and directory authorities no longer try to rebuild
16374 long-term connections to all servers. We still don't hang up
16375 connections in these two cases though -- we need to look at it
16376 more carefully to avoid flapping, and we likely need to wait til
16377 0.1.1.x is obsolete.
16378 - Drop compatibility with obsolete Tors that permit create cells
16379 to have the wrong circ_id_type.
16380 - Re-enable per-connection rate limiting. Get rid of the "OP
16381 bandwidth" concept. Lay groundwork for "bandwidth classes" --
16382 separate global buckets that apply depending on what sort of conn
16384 - Start publishing one minute or so after we find our ORPort
16385 to be reachable. This will help reduce the number of descriptors
16386 we have for ourselves floating around, since it's quite likely
16387 other things (e.g. DirPort) will change during that minute too.
16388 - Fork the v1 directory protocol into its own spec document,
16389 and mark dir-spec.txt as the currently correct (v2) spec.
16392 - When we find our DirPort to be reachable, publish a new descriptor
16393 so we'll tell the world (reported by pnx).
16394 - Publish a new descriptor after we hup/reload. This is important
16395 if our config has changed such that we'll want to start advertising
16396 our DirPort now, etc.
16397 - Allow Tor to start when RunAsDaemon is set but no logs are set.
16398 - When we have a state file we cannot parse, tell the user and
16399 move it aside. Now we avoid situations where the user starts
16400 Tor in 1904, Tor writes a state file with that timestamp in it,
16401 the user fixes her clock, and Tor refuses to start.
16402 - Fix configure.in to not produce broken configure files with
16403 more recent versions of autoconf. Thanks to Clint for his auto*
16405 - "tor --verify-config" now exits with -1(255) or 0 depending on
16406 whether the config options are bad or good.
16407 - Resolve bug 321 when using dnsworkers: append a period to every
16408 address we resolve at the exit node, so that we do not accidentally
16409 pick up local addresses, and so that failing searches are retried
16410 in the resolver search domains. (This is already solved for
16411 eventdns.) (This breaks Blossom servers for now.)
16412 - If we are using an exit enclave and we can't connect, e.g. because
16413 its webserver is misconfigured to not listen on localhost, then
16414 back off and try connecting from somewhere else before we fail.
16417 - Start compiling on MinGW on Windows (patches from Mike Chiussi).
16418 - Start compiling on MSVC6 on Windows (patches from Frediano Ziglio).
16419 - Fix bug 314: Tor clients issued "unsafe socks" warnings even
16420 when the IP address is mapped through MapAddress to a hostname.
16421 - Start passing "ipv4" hints to getaddrinfo(), so servers don't do
16422 useless IPv6 DNS resolves.
16423 - Patch suggested by Karsten Loesing: respond to SIGNAL command
16424 before we execute the signal, in case the signal shuts us down.
16425 - Clean up AllowInvalidNodes man page entry.
16426 - Claim a commonname of Tor, rather than TOR, in TLS handshakes.
16427 - Add more asserts to track down an assert error on a windows Tor
16428 server with connection_add being called with socket == -1.
16429 - Handle reporting OR_CONN_EVENT_NEW events to the controller.
16430 - Fix misleading log messages: an entry guard that is "unlisted",
16431 as well as not known to be "down" (because we've never heard
16432 of it), is not therefore "up".
16433 - Remove code to special-case "-cvs" ending, since it has not
16434 actually mattered since 0.0.9.
16435 - Make our socks5 handling more robust to broken socks clients:
16436 throw out everything waiting on the buffer in between socks
16437 handshake phases, since they can't possibly (so the theory
16438 goes) have predicted what we plan to respond to them.
16441 Changes in version 0.1.1.23 - 2006-07-30
16443 - Fast Tor servers, especially exit nodes, were triggering asserts
16444 due to a bug in handling the list of pending DNS resolves. Some
16445 bugs still remain here; we're hunting them.
16446 - Entry guards could crash clients by sending unexpected input.
16447 - More fixes on reachability testing: if you find yourself reachable,
16448 then don't ever make any client requests (so you stop predicting
16449 circuits), then hup or have your clock jump, then later your IP
16450 changes, you won't think circuits are working, so you won't try to
16451 test reachability, so you won't publish.
16454 - Avoid a crash if the controller does a resetconf firewallports
16455 and then a setconf fascistfirewall=1.
16456 - Avoid an integer underflow when the dir authority decides whether
16457 a router is stable: we might wrongly label it stable, and compute
16458 a slightly wrong median stability, when a descriptor is published
16460 - Fix a place where we might trigger an assert if we can't build our
16461 own server descriptor yet.
16464 Changes in version 0.1.1.22 - 2006-07-05
16466 - Fix a big bug that was causing servers to not find themselves
16467 reachable if they changed IP addresses. Since only 0.1.1.22+
16468 servers can do reachability testing correctly, now we automatically
16469 make sure to test via one of these.
16470 - Fix to allow clients and mirrors to learn directory info from
16471 descriptor downloads that get cut off partway through.
16472 - Directory authorities had a bug in deciding if a newly published
16473 descriptor was novel enough to make everybody want a copy -- a few
16474 servers seem to be publishing new descriptors many times a minute.
16476 - Fix a rare bug that was causing some servers to complain about
16477 "closing wedged cpuworkers" and skip some circuit create requests.
16478 - Make the Exit flag in directory status documents actually work.
16481 Changes in version 0.1.1.21 - 2006-06-10
16482 o Crash and assert fixes from 0.1.1.20:
16483 - Fix a rare crash on Tor servers that have enabled hibernation.
16484 - Fix a seg fault on startup for Tor networks that use only one
16485 directory authority.
16486 - Fix an assert from a race condition that occurs on Tor servers
16487 while exiting, where various threads are trying to log that they're
16488 exiting, and delete the logs, at the same time.
16489 - Make our unit tests pass again on certain obscure platforms.
16492 - Add support for building SUSE RPM packages.
16493 - Speed up initial bootstrapping for clients: if we are making our
16494 first ever connection to any entry guard, then don't mark it down
16496 - When only one Tor server in the network is labelled as a guard,
16497 and we've already picked him, we would cycle endlessly picking him
16498 again, being unhappy about it, etc. Now we specifically exclude
16499 current guards when picking a new guard.
16500 - Servers send create cells more reliably after the TLS connection
16501 is established: we were sometimes forgetting to send half of them
16502 when we had more than one pending.
16503 - If we get a create cell that asks us to extend somewhere, but the
16504 Tor server there doesn't match the expected digest, we now send
16505 a destroy cell back, rather than silently doing nothing.
16506 - Make options->RedirectExit work again.
16507 - Make cookie authentication for the controller work again.
16508 - Stop being picky about unusual characters in the arguments to
16509 mapaddress. It's none of our business.
16510 - Add a new config option "TestVia" that lets you specify preferred
16511 middle hops to use for test circuits. Perhaps this will let me
16512 debug the reachability problems better.
16514 o Log / documentation fixes:
16515 - If we're a server and some peer has a broken TLS certificate, don't
16516 log about it unless ProtocolWarnings is set, i.e., we want to hear
16517 about protocol violations by others.
16518 - Fix spelling of VirtualAddrNetwork in man page.
16519 - Add a better explanation at the top of the autogenerated torrc file
16520 about what happened to our old torrc.
16523 Changes in version 0.1.1.20 - 2006-05-23
16525 - Downgrade a log severity where servers complain that they're
16527 - Avoid a compile warning on FreeBSD.
16528 - Remove string size limit on NEWDESC messages; solve bug 291.
16529 - Correct the RunAsDaemon entry in the man page; ignore RunAsDaemon
16530 more thoroughly when we're running on windows.
16533 Changes in version 0.1.1.19-rc - 2006-05-03
16535 - Regenerate our local descriptor if it's dirty and we try to use
16536 it locally (e.g. if it changes during reachability detection).
16537 - If we setconf our ORPort to 0, we continued to listen on the
16538 old ORPort and receive connections.
16539 - Avoid a second warning about machine/limits.h on Debian
16541 - Be willing to add our own routerinfo into the routerlist.
16542 Now authorities will include themselves in their directories
16543 and network-statuses.
16544 - Stop trying to upload rendezvous descriptors to every
16545 directory authority: only try the v1 authorities.
16546 - Servers no longer complain when they think they're not
16547 registered with the directory authorities. There were too many
16549 - Backport dist-rpm changes so rpms can be built without errors.
16552 - Implement an option, VirtualAddrMask, to set which addresses
16553 get handed out in response to mapaddress requests. This works
16554 around a bug in tsocks where 127.0.0.0/8 is never socksified.
16557 Changes in version 0.1.1.18-rc - 2006-04-10
16559 - Work harder to download live network-statuses from all the
16560 directory authorities we know about. Improve the threshold
16561 decision logic so we're more robust to edge cases.
16562 - When fetching rendezvous descriptors, we were willing to ask
16563 v2 authorities too, which would always return 404.
16566 - Stop listing down or invalid nodes in the v1 directory. This will
16567 reduce its bulk by about 1/3, and reduce load on directory
16569 - When deciding whether a router is Fast or Guard-worthy, consider
16570 his advertised BandwidthRate and not just the BandwidthCapacity.
16571 - No longer ship INSTALL and README files -- they are useless now.
16572 - Force rpmbuild to behave and honor target_cpu.
16573 - Avoid warnings about machine/limits.h on Debian GNU/kFreeBSD.
16574 - Start to include translated versions of the tor-doc-*.html
16575 files, along with the screenshots. Still needs more work.
16576 - Start sending back 512 and 451 errors if mapaddress fails,
16577 rather than not sending anything back at all.
16578 - When we fail to bind or listen on an incoming or outgoing
16579 socket, we should close it before failing. otherwise we just
16580 leak it. (thanks to weasel for finding.)
16581 - Allow "getinfo dir/status/foo" to work, as long as your DirPort
16582 is enabled. (This is a hack, and will be fixed in 0.1.2.x.)
16583 - Make NoPublish (even though deprecated) work again.
16584 - Fix a minor security flaw where a versioning auth dirserver
16585 could list a recommended version many times in a row to make
16586 clients more convinced that it's recommended.
16587 - Fix crash bug if there are two unregistered servers running
16588 with the same nickname, one of them is down, and you ask for
16589 them by nickname in your EntryNodes or ExitNodes. Also, try
16590 to pick the one that's running rather than an arbitrary one.
16591 - Fix an infinite loop we could hit if we go offline for too long.
16592 - Complain when we hit WSAENOBUFS on recv() or write() too.
16593 Perhaps this will help us hunt the bug.
16594 - If you're not a versioning dirserver, don't put the string
16595 "client-versions \nserver-versions \n" in your network-status.
16596 - Lower the minimum required number of file descriptors to 1000,
16597 so we can have some overhead for Valgrind on Linux, where the
16598 default ulimit -n is 1024.
16601 - Add tor.dizum.com as the fifth authoritative directory server.
16602 - Add a new config option FetchUselessDescriptors, off by default,
16603 for when you plan to run "exitlist" on your client and you want
16604 to know about even the non-running descriptors.
16607 Changes in version 0.1.1.17-rc - 2006-03-28
16609 - Clients and servers since 0.1.1.10-alpha have been expiring
16610 connections whenever they are idle for 5 minutes and they *do*
16611 have circuits on them. Oops. With this new version, clients will
16612 discard their previous entry guard choices and avoid choosing
16613 entry guards running these flawed versions.
16614 - Fix memory leak when uncompressing concatenated zlib streams. This
16615 was causing substantial leaks over time on Tor servers.
16616 - The v1 directory was including servers as much as 48 hours old,
16617 because that's how the new routerlist->routers works. Now only
16618 include them if they're 20 hours old or less.
16621 - Resume building on irix64, netbsd 2.0, etc.
16622 - On non-gcc compilers (e.g. solaris), use "-g -O" instead of
16624 - Stop writing the "router.desc" file, ever. Nothing uses it anymore,
16625 and it is confusing some users.
16626 - Mirrors stop caching the v1 directory so often.
16627 - Make the max number of old descriptors that a cache will hold
16628 rise with the number of directory authorities, so we can scale.
16629 - Change our win32 uname() hack to be more forgiving about what
16630 win32 versions it thinks it's found.
16633 - Add lefkada.eecs.harvard.edu as a fourth authoritative directory
16635 - When the controller's *setconf commands fail, collect an error
16636 message in a string and hand it back to the controller.
16637 - Make the v2 dir's "Fast" flag based on relative capacity, just
16638 like "Stable" is based on median uptime. Name everything in the
16639 top 7/8 Fast, and only the top 1/2 gets to be a Guard.
16640 - Log server fingerprint on startup, so new server operators don't
16641 have to go hunting around their filesystem for it.
16642 - Return a robots.txt on our dirport to discourage google indexing.
16643 - Let the controller ask for GETINFO dir/status/foo so it can ask
16644 directly rather than connecting to the dir port. Only works when
16645 dirport is set for now.
16647 o New config options rather than constants in the code:
16648 - SocksTimeout: How long do we let a socks connection wait
16649 unattached before we fail it?
16650 - CircuitBuildTimeout: Cull non-open circuits that were born
16651 at least this many seconds ago.
16652 - CircuitIdleTimeout: Cull open clean circuits that were born
16653 at least this many seconds ago.
16656 Changes in version 0.1.1.16-rc - 2006-03-18
16657 o Bugfixes on 0.1.1.15-rc:
16658 - Fix assert when the controller asks to attachstream a connect-wait
16659 or resolve-wait stream.
16660 - Now do address rewriting when the controller asks us to attach
16661 to a particular circuit too. This will let Blossom specify
16662 "moria2.exit" without having to learn what moria2's IP address is.
16663 - Make the "tor --verify-config" command-line work again, so people
16664 can automatically check if their torrc will parse.
16665 - Authoritative dirservers no longer require an open connection from
16666 a server to consider him "reachable". We need this change because
16667 when we add new auth dirservers, old servers won't know not to
16669 - Let Tor build on Sun CC again.
16670 - Fix an off-by-one buffer size in dirserv.c that magically never
16671 hit our three authorities but broke sjmurdoch's own tor network.
16672 - If we as a directory mirror don't know of any v1 directory
16673 authorities, then don't try to cache any v1 directories.
16674 - Stop warning about unknown servers in our family when they are
16675 given as hex digests.
16676 - Stop complaining as quickly to the server operator that he
16677 hasn't registered his nickname/key binding.
16678 - Various cleanups so we can add new V2 Auth Dirservers.
16679 - Change "AllowUnverifiedNodes" to "AllowInvalidNodes", to
16680 reflect the updated flags in our v2 dir protocol.
16681 - Resume allowing non-printable characters for exit streams (both
16682 for connecting and for resolving). Now we tolerate applications
16683 that don't follow the RFCs. But continue to block malformed names
16686 o Bugfixes on 0.1.0.x:
16687 - Fix assert bug in close_logs(): when we close and delete logs,
16688 remove them all from the global "logfiles" list.
16689 - Fix minor integer overflow in calculating when we expect to use up
16690 our bandwidth allocation before hibernating.
16691 - Fix a couple of bugs in OpenSSL detection. Also, deal better when
16692 there are multiple SSLs installed with different versions.
16693 - When we try to be a server and Address is not explicitly set and
16694 our hostname resolves to a private IP address, try to use an
16695 interface address if it has a public address. Now Windows machines
16696 that think of themselves as localhost can work by default.
16699 - Let the controller ask for GETINFO dir/server/foo so it can ask
16700 directly rather than connecting to the dir port.
16701 - Let the controller tell us about certain router descriptors
16702 that it doesn't want Tor to use in circuits. Implement
16703 SETROUTERPURPOSE and modify +POSTDESCRIPTOR to do this.
16704 - New config option SafeSocks to reject all application connections
16705 using unsafe socks protocols. Defaults to off.
16708 Changes in version 0.1.1.15-rc - 2006-03-11
16709 o Bugfixes and cleanups:
16710 - When we're printing strings from the network, don't try to print
16711 non-printable characters. This protects us against shell escape
16712 sequence exploits, and also against attacks to fool humans into
16713 misreading their logs.
16714 - Fix a bug where Tor would fail to establish any connections if you
16715 left it off for 24 hours and then started it: we were happy with
16716 the obsolete network statuses, but they all referred to router
16717 descriptors that were too old to fetch, so we ended up with no
16718 valid router descriptors.
16719 - Fix a seg fault in the controller's "getinfo orconn-status"
16720 command while listing status on incoming handshaking connections.
16721 Introduce a status name "NEW" for these connections.
16722 - If we get a linelist or linelist_s config option from the torrc
16723 (e.g. ExitPolicy) and it has no value, warn and skip rather than
16724 silently resetting it to its default.
16725 - Don't abandon entry guards until they've been down or gone for
16727 - Cleaner and quieter log messages.
16730 - New controller signal NEWNYM that makes new application requests
16731 use clean circuits.
16732 - Add a new circuit purpose 'controller' to let the controller ask
16733 for a circuit that Tor won't try to use. Extend the EXTENDCIRCUIT
16734 controller command to let you specify the purpose if you're
16735 starting a new circuit. Add a new SETCIRCUITPURPOSE controller
16736 command to let you change a circuit's purpose after it's been
16738 - Accept "private:*" in routerdesc exit policies; not generated yet
16739 because older Tors do not understand it.
16740 - Add BSD-style contributed startup script "rc.subr" from Peter
16744 Changes in version 0.1.1.14-alpha - 2006-02-20
16745 o Bugfixes on 0.1.1.x:
16746 - Don't die if we ask for a stdout or stderr log (even implicitly)
16747 and we're set to RunAsDaemon -- just warn.
16748 - We still had a few bugs in the OR connection rotation code that
16749 caused directory servers to slowly aggregate connections to other
16750 fast Tor servers. This time for sure!
16751 - Make log entries on Win32 include the name of the function again.
16752 - We were treating a pair of exit policies if they were equal even
16753 if one said accept and the other said reject -- causing us to
16754 not always publish a new descriptor since we thought nothing
16756 - Retry pending server downloads as well as pending networkstatus
16757 downloads when we unexpectedly get a socks request.
16758 - We were ignoring the IS_FAST flag in the directory status,
16759 meaning we were willing to pick trivial-bandwidth nodes for "fast"
16761 - If the controller's SAVECONF command fails (e.g. due to file
16762 permissions), let the controller know that it failed.
16765 - If we're trying to be a Tor server and running Windows 95/98/ME
16766 as a server, explain that we'll likely crash.
16767 - When we're a server, a client asks for an old-style directory,
16768 and our write bucket is empty, don't give it to him. This way
16769 small servers can continue to serve the directory *sometimes*,
16770 without getting overloaded.
16771 - Compress exit policies even more -- look for duplicate lines
16773 - Clients now honor the "guard" flag in the router status when
16774 picking entry guards, rather than looking at is_fast or is_stable.
16775 - Retain unrecognized lines in $DATADIR/state file, so that we can
16776 be forward-compatible.
16777 - Generate 18.0.0.0/8 address policy format in descs when we can;
16778 warn when the mask is not reducible to a bit-prefix.
16779 - Let the user set ControlListenAddress in the torrc. This can be
16780 dangerous, but there are some cases (like a secured LAN) where it
16782 - Split ReachableAddresses into ReachableDirAddresses and
16783 ReachableORAddresses, so we can restrict Dir conns to port 80
16784 and OR conns to port 443.
16785 - Now we can target arch and OS in rpm builds (contributed by
16786 Phobos). Also make the resulting dist-rpm filename match the
16788 - New config options to help controllers: FetchServerDescriptors
16789 and FetchHidServDescriptors for whether to fetch server
16790 info and hidserv info or let the controller do it, and
16791 PublishServerDescriptor and PublishHidServDescriptors.
16792 - Also let the controller set the __AllDirActionsPrivate config
16793 option if you want all directory fetches/publishes to happen via
16794 Tor (it assumes your controller bootstraps your circuits).
16797 Changes in version 0.1.0.17 - 2006-02-17
16798 o Crash bugfixes on 0.1.0.x:
16799 - When servers with a non-zero DirPort came out of hibernation,
16800 sometimes they would trigger an assert.
16802 o Other important bugfixes:
16803 - On platforms that don't have getrlimit (like Windows), we were
16804 artificially constraining ourselves to a max of 1024
16805 connections. Now just assume that we can handle as many as 15000
16806 connections. Hopefully this won't cause other problems.
16808 o Backported features:
16809 - When we're a server, a client asks for an old-style directory,
16810 and our write bucket is empty, don't give it to him. This way
16811 small servers can continue to serve the directory *sometimes*,
16812 without getting overloaded.
16813 - Whenever you get a 503 in response to a directory fetch, try
16814 once more. This will become important once servers start sending
16815 503's whenever they feel busy.
16816 - Fetch a new directory every 120 minutes, not every 40 minutes.
16817 Now that we have hundreds of thousands of users running the old
16818 directory algorithm, it's starting to hurt a lot.
16819 - Bump up the period for forcing a hidden service descriptor upload
16820 from 20 minutes to 1 hour.
16823 Changes in version 0.1.1.13-alpha - 2006-02-09
16824 o Crashes in 0.1.1.x:
16825 - When you tried to setconf ORPort via the controller, Tor would
16826 crash. So people using TorCP to become a server were sad.
16827 - Solve (I hope) the stack-smashing bug that we were seeing on fast
16828 servers. The problem appears to be something do with OpenSSL's
16829 random number generation, or how we call it, or something. Let me
16830 know if the crashes continue.
16831 - Turn crypto hardware acceleration off by default, until we find
16832 somebody smart who can test it for us. (It appears to produce
16833 seg faults in at least some cases.)
16834 - Fix a rare assert error when we've tried all intro points for
16835 a hidden service and we try fetching the service descriptor again:
16836 "Assertion conn->state != AP_CONN_STATE_RENDDESC_WAIT failed"
16839 - Fix a major load balance bug: we were round-robining in 16 KB
16840 chunks, and servers with bandwidthrate of 20 KB, while downloading
16841 a 600 KB directory, would starve their other connections. Now we
16842 try to be a bit more fair.
16843 - Dir authorities and mirrors were never expiring the newest
16844 descriptor for each server, causing memory and directory bloat.
16845 - Fix memory-bloating and connection-bloating bug on servers: We
16846 were never closing any connection that had ever had a circuit on
16847 it, because we were checking conn->n_circuits == 0, yet we had a
16848 bug that let it go negative.
16849 - Make Tor work using squid as your http proxy again -- squid
16850 returns an error if you ask for a URL that's too long, and it uses
16851 a really generic error message. Plus, many people are behind a
16852 transparent squid so they don't even realize it.
16853 - On platforms that don't have getrlimit (like Windows), we were
16854 artificially constraining ourselves to a max of 1024
16855 connections. Now just assume that we can handle as many as 15000
16856 connections. Hopefully this won't cause other problems.
16857 - Add a new config option ExitPolicyRejectPrivate which defaults to
16858 1. This means all exit policies will begin with rejecting private
16859 addresses, unless the server operator explicitly turns it off.
16862 - Clients no longer download descriptors for non-running
16864 - Before we add new directory authorities, we should make it
16865 clear that only v1 authorities should receive/publish hidden
16866 service descriptors.
16869 - As soon as we've fetched some more directory info, immediately
16870 try to download more server descriptors. This way we don't have
16871 a 10 second pause during initial bootstrapping.
16872 - Remove even more loud log messages that the server operator can't
16874 - When we're running an obsolete or un-recommended version, make
16875 the log message more clear about what the problem is and what
16876 versions *are* still recommended.
16877 - Provide a more useful warn message when our onion queue gets full:
16878 the CPU is too slow or the exit policy is too liberal.
16879 - Don't warn when we receive a 503 from a dirserver/cache -- this
16880 will pave the way for them being able to refuse if they're busy.
16881 - When we fail to bind a listener, try to provide a more useful
16882 log message: e.g., "Is Tor already running?"
16883 - Adjust tor-spec to parameterize cell and key lengths. Now Ian
16884 Goldberg can prove things about our handshake protocol more
16886 - MaxConn has been obsolete for a while now. Document the ConnLimit
16887 config option, which is a *minimum* number of file descriptors
16888 that must be available else Tor refuses to start.
16889 - Apply Matt Ghali's --with-syslog-facility patch to ./configure
16890 if you log to syslog and want something other than LOG_DAEMON.
16891 - Make dirservers generate a separate "guard" flag to mean,
16892 "would make a good entry guard". Make clients parse it and vote
16893 on it. Not used by clients yet.
16894 - Implement --with-libevent-dir option to ./configure. Also, improve
16895 search techniques to find libevent, and use those for openssl too.
16896 - Bump the default bandwidthrate to 3 MB, and burst to 6 MB
16897 - Only start testing reachability once we've established a
16898 circuit. This will make startup on dirservers less noisy.
16899 - Don't try to upload hidden service descriptors until we have
16900 established a circuit.
16901 - Fix the controller's "attachstream 0" command to treat conn like
16902 it just connected, doing address remapping, handling .exit and
16903 .onion idioms, and so on. Now we're more uniform in making sure
16904 that the controller hears about new and closing connections.
16907 Changes in version 0.1.1.12-alpha - 2006-01-11
16908 o Bugfixes on 0.1.1.x:
16909 - The fix to close duplicate server connections was closing all
16910 Tor client connections if they didn't establish a circuit
16911 quickly enough. Oops.
16912 - Fix minor memory issue (double-free) that happened on exit.
16914 o Bugfixes on 0.1.0.x:
16915 - Tor didn't warn when it failed to open a log file.
16918 Changes in version 0.1.1.11-alpha - 2006-01-10
16919 o Crashes in 0.1.1.x:
16920 - Include all the assert/crash fixes from 0.1.0.16.
16921 - If you start Tor and then quit very quickly, there were some
16922 races that tried to free things that weren't allocated yet.
16923 - Fix a rare memory stomp if you're running hidden services.
16924 - Fix segfault when specifying DirServer in config without nickname.
16925 - Fix a seg fault when you finish connecting to a server but at
16926 that moment you dump his server descriptor.
16927 - Extendcircuit and Attachstream controller commands would
16928 assert/crash if you don't give them enough arguments.
16929 - Fix an assert error when we're out of space in the connection_list
16930 and we try to post a hidden service descriptor (reported by weasel).
16931 - If you specify a relative torrc path and you set RunAsDaemon in
16932 your torrc, then it chdir()'s to the new directory. If you HUP,
16933 it tries to load the new torrc location, fails, and exits.
16934 The fix: no longer allow a relative path to torrc using -f.
16937 - Implement "entry guards": automatically choose a handful of entry
16938 nodes and stick with them for all circuits. Only pick new guards
16939 when the ones you have are unsuitable, and if the old guards
16940 become suitable again, switch back. This will increase security
16941 dramatically against certain end-point attacks. The EntryNodes
16942 config option now provides some hints about which entry guards you
16943 want to use most; and StrictEntryNodes means to only use those.
16944 - New directory logic: download by descriptor digest, not by
16945 fingerprint. Caches try to download all listed digests from
16946 authorities; clients try to download "best" digests from caches.
16947 This avoids partitioning and isolating attacks better.
16948 - Make the "stable" router flag in network-status be the median of
16949 the uptimes of running valid servers, and make clients pay
16950 attention to the network-status flags. Thus the cutoff adapts
16951 to the stability of the network as a whole, making IRC, IM, etc
16952 connections more reliable.
16955 - Tor servers with dynamic IP addresses were needing to wait 18
16956 hours before they could start doing reachability testing using
16957 the new IP address and ports. This is because they were using
16958 the internal descriptor to learn what to test, yet they were only
16959 rebuilding the descriptor once they decided they were reachable.
16960 - Tor 0.1.1.9 and 0.1.1.10 had a serious bug that caused clients
16961 to download certain server descriptors, throw them away, and then
16962 fetch them again after 30 minutes. Now mirrors throw away these
16963 server descriptors so clients can't get them.
16964 - We were leaving duplicate connections to other ORs open for a week,
16965 rather than closing them once we detect a duplicate. This only
16966 really affected authdirservers, but it affected them a lot.
16967 - Spread the authdirservers' reachability testing over the entire
16968 testing interval, so we don't try to do 500 TLS's at once every
16972 - If the network is down, and we try to connect to a conn because
16973 we have a circuit in mind, and we timeout (30 seconds) because the
16974 network never answers, we were expiring the circuit, but we weren't
16975 obsoleting the connection or telling the entry_guards functions.
16976 - Some Tor servers process billions of cells per day. These statistics
16977 need to be uint64_t's.
16978 - Check for integer overflows in more places, when adding elements
16979 to smartlists. This could possibly prevent a buffer overflow
16980 on malicious huge inputs. I don't see any, but I haven't looked
16982 - ReachableAddresses kept growing new "reject *:*" lines on every
16984 - When you "setconf log" via the controller, it should remove all
16985 logs. We were automatically adding back in a "log notice stdout".
16986 - Newly bootstrapped Tor networks couldn't establish hidden service
16987 circuits until they had nodes with high uptime. Be more tolerant.
16988 - We were marking servers down when they could not answer every piece
16989 of the directory request we sent them. This was far too harsh.
16990 - Fix the torify (tsocks) config file to not use Tor for localhost
16992 - Directory authorities now go to the proper authority when asking for
16993 a networkstatus, even when they want a compressed one.
16994 - Fix a harmless bug that was causing Tor servers to log
16995 "Got an end because of misc error, but we're not an AP. Closing."
16996 - Authorities were treating their own descriptor changes as cosmetic,
16997 meaning the descriptor available in the network-status and the
16998 descriptor that clients downloaded were different.
16999 - The OS X installer was adding a symlink for tor_resolve but
17000 the binary was called tor-resolve (reported by Thomas Hardly).
17001 - Workaround a problem with some http proxies where they refuse GET
17002 requests that specify "Content-Length: 0" (reported by Adrian).
17003 - Fix wrong log message when you add a "HiddenServiceNodes" config
17004 line without any HiddenServiceDir line (reported by Chris Thomas).
17007 - Write the TorVersion into the state file so we have a prayer of
17008 keeping forward and backward compatibility.
17009 - Revive the FascistFirewall config option rather than eliminating it:
17010 now it's a synonym for ReachableAddresses *:80,*:443.
17011 - Clients choose directory servers from the network status lists,
17012 not from their internal list of router descriptors. Now they can
17013 go to caches directly rather than needing to go to authorities
17015 - Directory authorities ignore router descriptors that have only
17016 cosmetic differences: do this for 0.1.0.x servers now too.
17017 - Add a new flag to network-status indicating whether the server
17018 can answer v2 directory requests too.
17019 - Authdirs now stop whining so loudly about bad descriptors that
17020 they fetch from other dirservers. So when there's a log complaint,
17021 it's for sure from a freshly uploaded descriptor.
17022 - Reduce memory requirements in our structs by changing the order
17024 - There used to be two ways to specify your listening ports in a
17025 server descriptor: on the "router" line and with a separate "ports"
17026 line. Remove support for the "ports" line.
17027 - New config option "AuthDirRejectUnlisted" for auth dirservers as
17028 a panic button: if we get flooded with unusable servers we can
17029 revert to only listing servers in the approved-routers file.
17030 - Auth dir servers can now mark a fingerprint as "!reject" or
17031 "!invalid" in the approved-routers file (as its nickname), to
17032 refuse descriptors outright or include them but marked as invalid.
17033 - Servers store bandwidth history across restarts/crashes.
17034 - Add reasons to DESTROY and RELAY_TRUNCATED cells, so clients can
17035 get a better idea of why their circuits failed. Not used yet.
17036 - Directory mirrors now cache up to 16 unrecognized network-status
17037 docs. Now we can add new authdirservers and they'll be cached too.
17038 - When picking a random directory, prefer non-authorities if any
17040 - New controller option "getinfo desc/all-recent" to fetch the
17041 latest server descriptor for every router that Tor knows about.
17044 Changes in version 0.1.0.16 - 2006-01-02
17045 o Crash bugfixes on 0.1.0.x:
17046 - On Windows, build with a libevent patch from "I-M Weasel" to avoid
17047 corrupting the heap, losing FDs, or crashing when we need to resize
17048 the fd_sets. (This affects the Win32 binaries, not Tor's sources.)
17049 - It turns out sparc64 platforms crash on unaligned memory access
17050 too -- so detect and avoid this.
17051 - Handle truncated compressed data correctly (by detecting it and
17053 - Fix possible-but-unlikely free(NULL) in control.c.
17054 - When we were closing connections, there was a rare case that
17055 stomped on memory, triggering seg faults and asserts.
17056 - Avoid potential infinite recursion when building a descriptor. (We
17057 don't know that it ever happened, but better to fix it anyway.)
17058 - We were neglecting to unlink marked circuits from soon-to-close OR
17059 connections, which caused some rare scribbling on freed memory.
17060 - Fix a memory stomping race bug when closing the joining point of two
17061 rendezvous circuits.
17062 - Fix an assert in time parsing found by Steven Murdoch.
17064 o Other bugfixes on 0.1.0.x:
17065 - When we're doing reachability testing, provide more useful log
17066 messages so the operator knows what to expect.
17067 - Do not check whether DirPort is reachable when we are suppressing
17068 advertising it because of hibernation.
17069 - When building with -static or on Solaris, we sometimes needed -ldl.
17070 - When we're deciding whether a stream has enough circuits around
17071 that can handle it, count the freshly dirty ones and not the ones
17072 that are so dirty they won't be able to handle it.
17073 - When we're expiring old circuits, we had a logic error that caused
17074 us to close new rendezvous circuits rather than old ones.
17075 - Give a more helpful log message when you try to change ORPort via
17076 the controller: you should upgrade Tor if you want that to work.
17077 - We were failing to parse Tor versions that start with "Tor ".
17078 - Tolerate faulty streams better: when a stream fails for reason
17079 exitpolicy, stop assuming that the router is lying about his exit
17080 policy. When a stream fails for reason misc, allow it to retry just
17081 as if it was resolvefailed. When a stream has failed three times,
17082 reset its failure count so we can try again and get all three tries.
17085 Changes in version 0.1.1.10-alpha - 2005-12-11
17086 o Correctness bugfixes on 0.1.0.x:
17087 - On Windows, build with a libevent patch from "I-M Weasel" to avoid
17088 corrupting the heap, losing FDs, or crashing when we need to resize
17089 the fd_sets. (This affects the Win32 binaries, not Tor's sources.)
17090 - Stop doing the complex voodoo overkill checking for insecure
17091 Diffie-Hellman keys. Just check if it's in [2,p-2] and be happy.
17092 - When we were closing connections, there was a rare case that
17093 stomped on memory, triggering seg faults and asserts.
17094 - We were neglecting to unlink marked circuits from soon-to-close OR
17095 connections, which caused some rare scribbling on freed memory.
17096 - When we're deciding whether a stream has enough circuits around
17097 that can handle it, count the freshly dirty ones and not the ones
17098 that are so dirty they won't be able to handle it.
17099 - Recover better from TCP connections to Tor servers that are
17100 broken but don't tell you (it happens!); and rotate TLS
17101 connections once a week.
17102 - When we're expiring old circuits, we had a logic error that caused
17103 us to close new rendezvous circuits rather than old ones.
17104 - Fix a scary-looking but apparently harmless bug where circuits
17105 would sometimes start out in state CIRCUIT_STATE_OR_WAIT at
17106 servers, and never switch to state CIRCUIT_STATE_OPEN.
17107 - When building with -static or on Solaris, we sometimes needed to
17109 - Give a useful message when people run Tor as the wrong user,
17110 rather than telling them to start chowning random directories.
17111 - We were failing to inform the controller about new .onion streams.
17113 o Security bugfixes on 0.1.0.x:
17114 - Refuse server descriptors if the fingerprint line doesn't match
17115 the included identity key. Tor doesn't care, but other apps (and
17116 humans) might actually be trusting the fingerprint line.
17117 - We used to kill the circuit when we receive a relay command we
17118 don't recognize. Now we just drop it.
17119 - Start obeying our firewall options more rigorously:
17120 . If we can't get to a dirserver directly, try going via Tor.
17121 . Don't ever try to connect (as a client) to a place our
17122 firewall options forbid.
17123 . If we specify a proxy and also firewall options, obey the
17124 firewall options even when we're using the proxy: some proxies
17125 can only proxy to certain destinations.
17126 - Fix a bug found by Lasse Overlier: when we were making internal
17127 circuits (intended to be cannibalized later for rendezvous and
17128 introduction circuits), we were picking them so that they had
17129 useful exit nodes. There was no need for this, and it actually
17130 aids some statistical attacks.
17131 - Start treating internal circuits and exit circuits separately.
17132 It's important to keep them separate because internal circuits
17133 have their last hops picked like middle hops, rather than like
17134 exit hops. So exiting on them will break the user's expectations.
17136 o Bugfixes on 0.1.1.x:
17137 - Take out the mis-feature where we tried to detect IP address
17138 flapping for people with DynDNS, and chose not to upload a new
17139 server descriptor sometimes.
17140 - Try to be compatible with OpenSSL 0.9.6 again.
17141 - Log fix: when the controller is logging about .onion addresses,
17142 sometimes it didn't include the ".onion" part of the address.
17143 - Don't try to modify options->DirServers internally -- if the
17144 user didn't specify any, just add the default ones directly to
17145 the trusted dirserver list. This fixes a bug where people running
17146 controllers would use SETCONF on some totally unrelated config
17147 option, and Tor would start yelling at them about changing their
17149 - Let the controller's redirectstream command specify a port, in
17150 case the controller wants to change that too.
17151 - When we requested a pile of server descriptors, we sometimes
17152 accidentally launched a duplicate request for the first one.
17153 - Bugfix for trackhostexits: write down the fingerprint of the
17154 chosen exit, not its nickname, because the chosen exit might not
17156 - When parsing foo.exit, if foo is unknown, and we are leaving
17157 circuits unattached, set the chosen_exit field and leave the
17158 address empty. This matters because controllers got confused
17160 - Directory authorities no longer try to download server
17161 descriptors that they know they will reject.
17163 o Features and updates:
17164 - Replace balanced trees with hash tables: this should make stuff
17165 significantly faster.
17166 - Resume using the AES counter-mode implementation that we ship,
17167 rather than OpenSSL's. Ours is significantly faster.
17168 - Many other CPU and memory improvements.
17169 - Add a new config option FastFirstHopPK (on by default) so clients
17170 do a trivial crypto handshake for their first hop, since TLS has
17171 already taken care of confidentiality and authentication.
17172 - Add a new config option TestSocks so people can see if their
17173 applications are using socks4, socks4a, socks5-with-ip, or
17174 socks5-with-hostname. This way they don't have to keep mucking
17175 with tcpdump and wondering if something got cached somewhere.
17176 - Warn when listening on a public address for socks. I suspect a
17177 lot of people are setting themselves up as open socks proxies,
17178 and they have no idea that jerks on the Internet are using them,
17179 since they simply proxy the traffic into the Tor network.
17180 - Add "private:*" as an alias in configuration for policies. Now
17181 you can simplify your exit policy rather than needing to list
17182 every single internal or nonroutable network space.
17183 - Add a new controller event type that allows controllers to get
17184 all server descriptors that were uploaded to a router in its role
17185 as authoritative dirserver.
17186 - Start shipping socks-extensions.txt, tor-doc-unix.html,
17187 tor-doc-server.html, and stylesheet.css in the tarball.
17188 - Stop shipping tor-doc.html in the tarball.
17191 Changes in version 0.1.1.9-alpha - 2005-11-15
17192 o Usability improvements:
17193 - Start calling it FooListenAddress rather than FooBindAddress,
17194 since few of our users know what it means to bind an address
17196 - Reduce clutter in server logs. We're going to try to make
17197 them actually usable now. New config option ProtocolWarnings that
17198 lets you hear about how _other Tors_ are breaking the protocol. Off
17200 - Divide log messages into logging domains. Once we put some sort
17201 of interface on this, it will let people looking at more verbose
17202 log levels specify the topics they want to hear more about.
17203 - Make directory servers return better http 404 error messages
17204 instead of a generic "Servers unavailable".
17205 - Check for even more Windows version flags when writing the platform
17206 string in server descriptors, and note any we don't recognize.
17207 - Clean up more of the OpenSSL memory when exiting, so we can detect
17208 memory leaks better.
17209 - Make directory authorities be non-versioning, non-naming by
17210 default. Now we can add new directory servers without requiring
17211 their operators to pay close attention.
17212 - When logging via syslog, include the pid whenever we provide
17213 a log entry. Suggested by Todd Fries.
17215 o Performance improvements:
17216 - Directory servers now silently throw away new descriptors that
17217 haven't changed much if the timestamps are similar. We do this to
17218 tolerate older Tor servers that upload a new descriptor every 15
17219 minutes. (It seemed like a good idea at the time.)
17220 - Inline bottleneck smartlist functions; use fast versions by default.
17221 - Add a "Map from digest to void*" abstraction digestmap_t so we
17222 can do less hex encoding/decoding. Use it in router_get_by_digest()
17223 to resolve a performance bottleneck.
17224 - Allow tor_gzip_uncompress to extract as much as possible from
17225 truncated compressed data. Try to extract as many
17226 descriptors as possible from truncated http responses (when
17227 DIR_PURPOSE_FETCH_ROUTERDESC).
17228 - Make circ->onionskin a pointer, not a static array. moria2 was using
17229 125000 circuit_t's after it had been up for a few weeks, which
17230 translates to 20+ megs of wasted space.
17231 - The private half of our EDH handshake keys are now chosen out
17232 of 320 bits, not 1024 bits. (Suggested by Ian Goldberg.)
17234 o Security improvements:
17235 - Start making directory caches retain old routerinfos, so soon
17236 clients can start asking by digest of descriptor rather than by
17237 fingerprint of server.
17238 - Add half our entropy from RAND_poll in OpenSSL. This knows how
17239 to use egd (if present), openbsd weirdness (if present), vms/os2
17240 weirdness (if we ever port there), and more in the future.
17242 o Bugfixes on 0.1.0.x:
17243 - Do round-robin writes of at most 16 kB per write. This might be
17244 more fair on loaded Tor servers, and it might resolve our Windows
17245 crash bug. It might also slow things down.
17246 - Our TLS handshakes were generating a single public/private
17247 keypair for the TLS context, rather than making a new one for
17248 each new connections. Oops. (But we were still rotating them
17249 periodically, so it's not so bad.)
17250 - When we were cannibalizing a circuit with a particular exit
17251 node in mind, we weren't checking to see if that exit node was
17252 already present earlier in the circuit. Oops.
17253 - When a Tor server's IP changes (e.g. from a dyndns address),
17254 upload a new descriptor so clients will learn too.
17255 - Really busy servers were keeping enough circuits open on stable
17256 connections that they were wrapping around the circuit_id
17257 space. (It's only two bytes.) This exposed a bug where we would
17258 feel free to reuse a circuit_id even if it still exists but has
17259 been marked for close. Try to fix this bug. Some bug remains.
17260 - If we would close a stream early (e.g. it asks for a .exit that
17261 we know would refuse it) but the LeaveStreamsUnattached config
17262 option is set by the controller, then don't close it.
17264 o Bugfixes on 0.1.1.8-alpha:
17265 - Fix a big pile of memory leaks, some of them serious.
17266 - Do not try to download a routerdesc if we would immediately reject
17268 - Resume inserting a newline between all router descriptors when
17269 generating (old style) signed directories, since our spec says
17271 - When providing content-type application/octet-stream for
17272 server descriptors using .z, we were leaving out the
17273 content-encoding header. Oops. (Everything tolerated this just
17274 fine, but that doesn't mean we need to be part of the problem.)
17275 - Fix a potential seg fault in getconf and getinfo using version 1
17276 of the controller protocol.
17277 - Avoid crash: do not check whether DirPort is reachable when we
17278 are suppressing it because of hibernation.
17279 - Make --hash-password not crash on exit.
17282 Changes in version 0.1.1.8-alpha - 2005-10-07
17283 o New features (major):
17284 - Clients don't download or use the directory anymore. Now they
17285 download and use network-statuses from the trusted dirservers,
17286 and fetch individual server descriptors as needed from mirrors.
17287 See dir-spec.txt for all the gory details.
17288 - Be more conservative about whether to advertise our DirPort.
17289 The main change is to not advertise if we're running at capacity
17290 and either a) we could hibernate or b) our capacity is low and
17291 we're using a default DirPort.
17292 - Use OpenSSL's AES when OpenSSL has version 0.9.7 or later.
17294 o New features (minor):
17295 - Try to be smart about when to retry network-status and
17296 server-descriptor fetches. Still needs some tuning.
17297 - Stop parsing, storing, or using running-routers output (but
17298 mirrors still cache and serve it).
17299 - Consider a threshold of versioning dirservers (dirservers who have
17300 an opinion about which Tor versions are still recommended) before
17301 deciding whether to warn the user that he's obsolete.
17302 - Dirservers can now reject/invalidate by key and IP, with the
17303 config options "AuthDirInvalid" and "AuthDirReject". This is
17304 useful since currently we automatically list servers as running
17305 and usable even if we know they're jerks.
17306 - Provide dire warnings to any users who set DirServer; move it out
17307 of torrc.sample and into torrc.complete.
17308 - Add MyFamily to torrc.sample in the server section.
17309 - Add nicknames to the DirServer line, so we can refer to them
17310 without requiring all our users to memorize their IP addresses.
17311 - When we get an EOF or a timeout on a directory connection, note
17312 how many bytes of serverdesc we are dropping. This will help
17313 us determine whether it is smart to parse incomplete serverdesc
17315 - Add a new function to "change pseudonyms" -- that is, to stop
17316 using any currently-dirty circuits for new streams, so we don't
17317 link new actions to old actions. Currently it's only called on
17318 HUP (or SIGNAL RELOAD).
17319 - On sighup, if UseHelperNodes changed to 1, use new circuits.
17320 - Start using RAND_bytes rather than RAND_pseudo_bytes from
17321 OpenSSL. Also, reseed our entropy every hour, not just at
17322 startup. And entropy in 512-bit chunks, not 160-bit chunks.
17324 o Fixes on 0.1.1.7-alpha:
17325 - Nobody ever implemented EVENT_ADDRMAP for control protocol
17326 version 0, so don't let version 0 controllers ask for it.
17327 - If you requested something with too many newlines via the
17328 v1 controller protocol, you could crash tor.
17329 - Fix a number of memory leaks, including some pretty serious ones.
17330 - Re-enable DirPort testing again, so Tor servers will be willing
17331 to advertise their DirPort if it's reachable.
17332 - On TLS handshake, only check the other router's nickname against
17333 its expected nickname if is_named is set.
17335 o Fixes forward-ported from 0.1.0.15:
17336 - Don't crash when we don't have any spare file descriptors and we
17337 try to spawn a dns or cpu worker.
17338 - Make the numbers in read-history and write-history into uint64s,
17339 so they don't overflow and publish negatives in the descriptor.
17341 o Fixes on 0.1.0.x:
17342 - For the OS X package's modified privoxy config file, comment
17343 out the "logfile" line so we don't log everything passed
17345 - We were whining about using socks4 or socks5-with-local-lookup
17346 even when it's an IP in the "virtual" range we designed exactly
17348 - We were leaking some memory every time the client changes IPs.
17349 - Never call free() on tor_malloc()d memory. This will help us
17350 use dmalloc to detect memory leaks.
17351 - Check for named servers when looking them up by nickname;
17352 warn when we'recalling a non-named server by its nickname;
17353 don't warn twice about the same name.
17354 - Try to list MyFamily elements by key, not by nickname, and warn
17355 if we've not heard of the server.
17356 - Make windows platform detection (uname equivalent) smarter.
17357 - It turns out sparc64 doesn't like unaligned access either.
17360 Changes in version 0.1.0.15 - 2005-09-23
17361 o Bugfixes on 0.1.0.x:
17362 - Reject ports 465 and 587 (spam targets) in default exit policy.
17363 - Don't crash when we don't have any spare file descriptors and we
17364 try to spawn a dns or cpu worker.
17365 - Get rid of IgnoreVersion undocumented config option, and make us
17366 only warn, never exit, when we're running an obsolete version.
17367 - Don't try to print a null string when your server finds itself to
17368 be unreachable and the Address config option is empty.
17369 - Make the numbers in read-history and write-history into uint64s,
17370 so they don't overflow and publish negatives in the descriptor.
17371 - Fix a minor memory leak in smartlist_string_remove().
17372 - We were only allowing ourselves to upload a server descriptor at
17373 most every 20 minutes, even if it changed earlier than that.
17374 - Clean up log entries that pointed to old URLs.
17377 Changes in version 0.1.1.7-alpha - 2005-09-14
17378 o Fixes on 0.1.1.6-alpha:
17379 - Exit servers were crashing when people asked them to make a
17380 connection to an address not in their exit policy.
17381 - Looking up a non-existent stream for a v1 control connection would
17383 - Fix a seg fault if we ask a dirserver for a descriptor by
17384 fingerprint but he doesn't know about him.
17385 - SETCONF was appending items to linelists, not clearing them.
17386 - SETCONF SocksBindAddress killed Tor if it fails to bind. Now back
17387 out and refuse the setconf if it would fail.
17388 - Downgrade the dirserver log messages when whining about
17392 - Add Peter Palfrader's check-tor script to tor/contrib/
17393 It lets you easily check whether a given server (referenced by
17394 nickname) is reachable by you.
17395 - Numerous changes to move towards client-side v2 directories. Not
17398 o Fixes on 0.1.0.x:
17399 - If the user gave tor an odd number of command-line arguments,
17400 we were silently ignoring the last one. Now we complain and fail.
17401 [This wins the oldest-bug prize -- this bug has been present since
17402 November 2002, as released in Tor 0.0.0.]
17403 - Do not use unaligned memory access on alpha, mips, or mipsel.
17404 It *works*, but is very slow, so we treat them as if it doesn't.
17405 - Retry directory requests if we fail to get an answer we like
17406 from a given dirserver (we were retrying before, but only if
17407 we fail to connect).
17408 - When writing the RecommendedVersions line, sort them first.
17409 - When the client asked for a rendezvous port that the hidden
17410 service didn't want to provide, we were sending an IP address
17411 back along with the end cell. Fortunately, it was zero. But stop
17413 - Correct "your server is reachable" log entries to indicate that
17414 it was self-testing that told us so.
17417 Changes in version 0.1.1.6-alpha - 2005-09-09
17418 o Fixes on 0.1.1.5-alpha:
17419 - We broke fascistfirewall in 0.1.1.5-alpha. Oops.
17420 - Fix segfault in unit tests in 0.1.1.5-alpha. Oops.
17421 - Fix bug with tor_memmem finding a match at the end of the string.
17422 - Make unit tests run without segfaulting.
17423 - Resolve some solaris x86 compile warnings.
17424 - Handle duplicate lines in approved-routers files without warning.
17425 - Fix bug where as soon as a server refused any requests due to his
17426 exit policy (e.g. when we ask for localhost and he tells us that's
17427 127.0.0.1 and he won't do it), we decided he wasn't obeying his
17428 exit policy using him for any exits.
17429 - Only do openssl hardware accelerator stuff if openssl version is
17432 o New controller features/fixes:
17433 - Add a "RESETCONF" command so you can set config options like
17434 AllowUnverifiedNodes and LongLivedPorts to "". Also, if you give
17435 a config option in the torrc with no value, then it clears it
17436 entirely (rather than setting it to its default).
17437 - Add a "GETINFO config-file" to tell us where torrc is.
17438 - Avoid sending blank lines when GETINFO replies should be empty.
17439 - Add a QUIT command for the controller (for using it manually).
17440 - Fix a bug in SAVECONF that was adding default dirservers and
17441 other redundant entries to the torrc file.
17443 o Start on the new directory design:
17444 - Generate, publish, cache, serve new network-status format.
17445 - Publish individual descriptors (by fingerprint, by "all", and by
17447 - Publish client and server recommended versions separately.
17448 - Allow tor_gzip_uncompress() to handle multiple concatenated
17449 compressed strings. Serve compressed groups of router
17450 descriptors. The compression logic here could be more
17452 - Distinguish v1 authorities (all currently trusted directories)
17453 from v2 authorities (all trusted directories).
17454 - Change DirServers config line to note which dirs are v1 authorities.
17455 - Add configuration option "V1AuthoritativeDirectory 1" which
17456 moria1, moria2, and tor26 should set.
17457 - Remove option when getting directory cache to see whether they
17458 support running-routers; they all do now. Replace it with one
17459 to see whether caches support v2 stuff.
17462 - Dirservers now do their own external reachability testing of each
17463 Tor server, and only list them as running if they've been found to
17464 be reachable. We also send back warnings to the server's logs if
17465 it uploads a descriptor that we already believe is unreachable.
17466 - Implement exit enclaves: if we know an IP address for the
17467 destination, and there's a running Tor server at that address
17468 which allows exit to the destination, then extend the circuit to
17469 that exit first. This provides end-to-end encryption and end-to-end
17470 authentication. Also, if the user wants a .exit address or enclave,
17471 use 4 hops rather than 3, and cannibalize a general circ for it
17473 - Permit transitioning from ORPort=0 to ORPort!=0, and back, from the
17474 controller. Also, rotate dns and cpu workers if the controller
17475 changes options that will affect them; and initialize the dns
17476 worker cache tree whether or not we start out as a server.
17477 - Only upload a new server descriptor when options change, 18
17478 hours have passed, uptime is reset, or bandwidth changes a lot.
17479 - Check [X-]Forwarded-For headers in HTTP requests when generating
17480 log messages. This lets people run dirservers (and caches) behind
17481 Apache but still know which IP addresses are causing warnings.
17483 o Config option changes:
17484 - Replace (Fascist)Firewall* config options with a new
17485 ReachableAddresses option that understands address policies.
17486 For example, "ReachableAddresses *:80,*:443"
17487 - Get rid of IgnoreVersion undocumented config option, and make us
17488 only warn, never exit, when we're running an obsolete version.
17489 - Make MonthlyAccountingStart config option truly obsolete now.
17491 o Fixes on 0.1.0.x:
17492 - Reject ports 465 and 587 in the default exit policy, since
17493 people have started using them for spam too.
17494 - It turns out we couldn't bootstrap a network since we added
17495 reachability detection in 0.1.0.1-rc. Good thing the Tor network
17496 has never gone down. Add an AssumeReachable config option to let
17497 servers and dirservers bootstrap. When we're trying to build a
17498 high-uptime or high-bandwidth circuit but there aren't enough
17499 suitable servers, try being less picky rather than simply failing.
17500 - Our logic to decide if the OR we connected to was the right guy
17501 was brittle and maybe open to a mitm for unverified routers.
17502 - We weren't cannibalizing circuits correctly for
17503 CIRCUIT_PURPOSE_C_ESTABLISH_REND and
17504 CIRCUIT_PURPOSE_S_ESTABLISH_INTRO, so we were being forced to
17505 build those from scratch. This should make hidden services faster.
17506 - Predict required circuits better, with an eye toward making hidden
17507 services faster on the service end.
17508 - Retry streams if the exit node sends back a 'misc' failure. This
17509 should result in fewer random failures. Also, after failing
17510 from resolve failed or misc, reset the num failures, so we give
17511 it a fair shake next time we try.
17512 - Clean up the rendezvous warn log msgs, and downgrade some to info.
17513 - Reduce severity on logs about dns worker spawning and culling.
17514 - When we're shutting down and we do something like try to post a
17515 server descriptor or rendezvous descriptor, don't complain that
17516 we seem to be unreachable. Of course we are, we're shutting down.
17517 - Add TTLs to RESOLVED, CONNECTED, and END_REASON_EXITPOLICY cells.
17518 We don't use them yet, but maybe one day our DNS resolver will be
17519 able to discover them.
17520 - Make ContactInfo mandatory for authoritative directory servers.
17521 - Require server descriptors to list IPv4 addresses -- hostnames
17522 are no longer allowed. This also fixes some potential security
17523 problems with people providing hostnames as their address and then
17524 preferentially resolving them to partition users.
17525 - Change log line for unreachability to explicitly suggest /etc/hosts
17526 as the culprit. Also make it clearer what IP address and ports we're
17527 testing for reachability.
17528 - Put quotes around user-supplied strings when logging so users are
17529 more likely to realize if they add bad characters (like quotes)
17531 - Let auth dir servers start without specifying an Address config
17533 - Make unit tests (and other invocations that aren't the real Tor)
17534 run without launching listeners, creating subdirectories, and so on.
17537 Changes in version 0.1.1.5-alpha - 2005-08-08
17538 o Bugfixes included in 0.1.0.14.
17540 o Bugfixes on 0.1.0.x:
17541 - If you write "HiddenServicePort 6667 127.0.0.1 6668" in your
17542 torrc rather than "HiddenServicePort 6667 127.0.0.1:6668",
17543 it would silently using ignore the 6668.
17546 Changes in version 0.1.0.14 - 2005-08-08
17547 o Bugfixes on 0.1.0.x:
17548 - Fix the other half of the bug with crypto handshakes
17550 - Fix an assert trigger if you send a 'signal term' via the
17551 controller when it's listening for 'event info' messages.
17554 Changes in version 0.1.1.4-alpha - 2005-08-04
17555 o Bugfixes included in 0.1.0.13.
17558 - Improve tor_gettimeofday() granularity on windows.
17559 - Make clients regenerate their keys when their IP address changes.
17560 - Implement some more GETINFO goodness: expose helper nodes, config
17561 options, getinfo keys.
17564 Changes in version 0.1.0.13 - 2005-08-04
17565 o Bugfixes on 0.1.0.x:
17566 - Fix a critical bug in the security of our crypto handshakes.
17567 - Fix a size_t underflow in smartlist_join_strings2() that made
17568 it do bad things when you hand it an empty smartlist.
17569 - Fix Windows installer to ship Tor license (thanks to Aphex for
17570 pointing out this oversight) and put a link to the doc directory
17572 - Explicitly set no-unaligned-access for sparc: it turns out the
17573 new gcc's let you compile broken code, but that doesn't make it
17577 Changes in version 0.1.1.3-alpha - 2005-07-23
17578 o Bugfixes on 0.1.1.2-alpha:
17579 - Fix a bug in handling the controller's "post descriptor"
17581 - Fix several bugs in handling the controller's "extend circuit"
17583 - Fix a bug in handling the controller's "stream status" event.
17584 - Fix an assert failure if we have a controller listening for
17585 circuit events and we go offline.
17586 - Re-allow hidden service descriptors to publish 0 intro points.
17587 - Fix a crash when generating your hidden service descriptor if
17588 you don't have enough intro points already.
17590 o New features on 0.1.1.2-alpha:
17591 - New controller function "getinfo accounting", to ask how
17592 many bytes we've used in this time period.
17593 - Experimental support for helper nodes: a lot of the risk from
17594 a small static adversary comes because users pick new random
17595 nodes every time they rebuild a circuit. Now users will try to
17596 stick to the same small set of entry nodes if they can. Not
17597 enabled by default yet.
17599 o Bugfixes on 0.1.0.12:
17600 - If you're an auth dir server, always publish your dirport,
17601 even if you haven't yet found yourself to be reachable.
17602 - Fix a size_t underflow in smartlist_join_strings2() that made
17603 it do bad things when you hand it an empty smartlist.
17606 Changes in version 0.1.0.12 - 2005-07-18
17607 o New directory servers:
17608 - tor26 has changed IP address.
17610 o Bugfixes on 0.1.0.x:
17611 - Fix a possible double-free in tor_gzip_uncompress().
17612 - When --disable-threads is set, do not search for or link against
17613 pthreads libraries.
17614 - Don't trigger an assert if an authoritative directory server
17615 claims its dirport is 0.
17616 - Fix bug with removing Tor as an NT service: some people were
17617 getting "The service did not return an error." Thanks to Matt
17621 Changes in version 0.1.1.2-alpha - 2005-07-15
17622 o New directory servers:
17623 - tor26 has changed IP address.
17625 o Bugfixes on 0.1.0.x, crashes/leaks:
17626 - Port the servers-not-obeying-their-exit-policies fix from
17628 - Fix an fd leak in start_daemon().
17629 - On Windows, you can't always reopen a port right after you've
17630 closed it. So change retry_listeners() to only close and re-open
17631 ports that have changed.
17632 - Fix a possible double-free in tor_gzip_uncompress().
17634 o Bugfixes on 0.1.0.x, usability:
17635 - When tor_socketpair() fails in Windows, give a reasonable
17636 Windows-style errno back.
17637 - Let people type "tor --install" as well as "tor -install" when
17639 want to make it an NT service.
17640 - NT service patch from Matt Edman to improve error messages.
17641 - When the controller asks for a config option with an abbreviated
17642 name, give the full name in our response.
17643 - Correct the man page entry on TrackHostExitsExpire.
17644 - Looks like we were never delivering deflated (i.e. compressed)
17645 running-routers lists, even when asked. Oops.
17646 - When --disable-threads is set, do not search for or link against
17647 pthreads libraries.
17649 o Bugfixes on 0.1.1.x:
17650 - Fix a seg fault with autodetecting which controller version is
17654 - New hidden service descriptor format: put a version in it, and
17655 let people specify introduction/rendezvous points that aren't
17656 in "the directory" (which is subjective anyway).
17657 - Allow the DEBUG controller event to work again. Mark certain log
17658 entries as "don't tell this to controllers", so we avoid cycles.
17661 Changes in version 0.1.0.11 - 2005-06-30
17662 o Bugfixes on 0.1.0.x:
17663 - Fix major security bug: servers were disregarding their
17664 exit policies if clients behaved unexpectedly.
17665 - Make OS X init script check for missing argument, so we don't
17666 confuse users who invoke it incorrectly.
17667 - Fix a seg fault in "tor --hash-password foo".
17668 - The MAPADDRESS control command was broken.
17671 Changes in version 0.1.1.1-alpha - 2005-06-29
17673 - Make OS X init script check for missing argument, so we don't
17674 confuse users who invoke it incorrectly.
17675 - Fix a seg fault in "tor --hash-password foo".
17676 - Fix a possible way to DoS dirservers.
17677 - When we complain that your exit policy implicitly allows local or
17678 private address spaces, name them explicitly so operators can
17680 - Make the log message less scary when all the dirservers are
17681 temporarily unreachable.
17682 - We were printing the number of idle dns workers incorrectly when
17686 - Revised controller protocol (version 1) that uses ascii rather
17687 than binary. Add supporting libraries in python and java so you
17688 can use the controller from your applications without caring how
17689 our protocol works.
17690 - Spiffy new support for crypto hardware accelerators. Can somebody
17694 Changes in version 0.0.9.10 - 2005-06-16
17695 o Bugfixes on 0.0.9.x (backported from 0.1.0.10):
17696 - Refuse relay cells that claim to have a length larger than the
17697 maximum allowed. This prevents a potential attack that could read
17698 arbitrary memory (e.g. keys) from an exit server's process
17702 Changes in version 0.1.0.10 - 2005-06-14
17703 o Allow a few EINVALs from libevent before dying. Warn on kqueue with
17704 libevent before 1.1a.
17707 Changes in version 0.1.0.9-rc - 2005-06-09
17709 - Reset buf->highwater every time buf_shrink() is called, not just on
17710 a successful shrink. This was causing significant memory bloat.
17711 - Fix buffer overflow when checking hashed passwords.
17712 - Security fix: if seeding the RNG on Win32 fails, quit.
17713 - Allow seeding the RNG on Win32 even when you're not running as
17715 - Disable threading on Solaris too. Something is wonky with it,
17716 cpuworkers, and reentrant libs.
17717 - Reenable the part of the code that tries to flush as soon as an
17718 OR outbuf has a full TLS record available. Perhaps this will make
17719 OR outbufs not grow as huge except in rare cases, thus saving lots
17720 of CPU time plus memory.
17721 - Reject malformed .onion addresses rather then passing them on as
17722 normal web requests.
17723 - Adapt patch from Adam Langley: fix possible memory leak in
17724 tor_lookup_hostname().
17725 - Initialize libevent later in the startup process, so the logs are
17726 already established by the time we start logging libevent warns.
17727 - Use correct errno on win32 if libevent fails.
17728 - Check and warn about known-bad/slow libevent versions.
17729 - Pay more attention to the ClientOnly config option.
17730 - Have torctl.in/tor.sh.in check for location of su binary (needed
17732 - Correct/add man page entries for LongLivedPorts, ExitPolicy,
17733 KeepalivePeriod, ClientOnly, NoPublish, HttpProxy, HttpsProxy,
17734 HttpProxyAuthenticator
17735 - Stop warning about sigpipes in the logs. We're going to
17736 pretend that getting these occassionally is normal and fine.
17737 - Resolve OS X installer bugs: stop claiming to be 0.0.9.2 in
17739 installer screens; and don't put stuff into StartupItems unless
17740 the user asks you to.
17741 - Require servers that use the default dirservers to have public IP
17742 addresses. We have too many servers that are configured with private
17743 IPs and their admins never notice the log entries complaining that
17744 their descriptors are being rejected.
17745 - Add OSX uninstall instructions. An actual uninstall script will
17749 Changes in version 0.1.0.8-rc - 2005-05-23
17751 - It turns out that kqueue on OS X 10.3.9 was causing kernel
17752 panics. Disable kqueue on all OS X Tors.
17753 - Fix RPM: remove duplicate line accidentally added to the rpm
17755 - Disable threads on openbsd too, since its gethostaddr is not
17757 - Tolerate libevent 0.8 since it still works, even though it's
17759 - Enable building on Red Hat 9.0 again.
17760 - Allow the middle hop of the testing circuit to be running any
17761 version, now that most of them have the bugfix to let them connect
17762 to unknown servers. This will allow reachability testing to work
17763 even when 0.0.9.7-0.0.9.9 become obsolete.
17764 - Handle relay cells with rh.length too large. This prevents
17765 a potential attack that could read arbitrary memory (maybe even
17766 keys) from the exit server's process.
17767 - We screwed up the dirport reachability testing when we don't yet
17768 have a cached version of the directory. Hopefully now fixed.
17769 - Clean up router_load_single_router() (used by the controller),
17770 so it doesn't seg fault on error.
17771 - Fix a minor memory leak when somebody establishes an introduction
17772 point at your Tor server.
17773 - If a socks connection ends because read fails, don't warn that
17774 you're not sending a socks reply back.
17777 - Add HttpProxyAuthenticator config option too, that works like
17778 the HttpsProxyAuthenticator config option.
17779 - Encode hashed controller passwords in hex instead of base64,
17780 to make it easier to write controllers.
17783 Changes in version 0.1.0.7-rc - 2005-05-17
17785 - Fix a bug in the OS X package installer that prevented it from
17786 installing on Tiger.
17787 - Fix a script bug in the OS X package installer that made it
17788 complain during installation.
17789 - Find libevent even if it's hiding in /usr/local/ and your
17790 CFLAGS and LDFLAGS don't tell you to look there.
17791 - Be able to link with libevent as a shared library (the default
17792 after 1.0d), even if it's hiding in /usr/local/lib and even
17793 if you haven't added /usr/local/lib to your /etc/ld.so.conf,
17794 assuming you're running gcc. Otherwise fail and give a useful
17796 - Fix a bug in the RPM packager: set home directory for _tor to
17797 something more reasonable when first installing.
17798 - Free a minor amount of memory that is still reachable on exit.
17801 Changes in version 0.1.0.6-rc - 2005-05-14
17803 - Implement --disable-threads configure option. Disable threads on
17804 netbsd by default, because it appears to have no reentrant resolver
17806 - Apple's OS X 10.4.0 ships with a broken kqueue. The new libevent
17807 release (1.1) detects and disables kqueue if it's broken.
17808 - Append default exit policy before checking for implicit internal
17809 addresses. Now we don't log a bunch of complaints on startup
17810 when using the default exit policy.
17811 - Some people were putting "Address " in their torrc, and they had
17812 a buggy resolver that resolved " " to 0.0.0.0. Oops.
17813 - If DataDir is ~/.tor, and that expands to /.tor, then default to
17814 LOCALSTATEDIR/tor instead.
17815 - Fix fragmented-message bug in TorControl.py.
17816 - Resolve a minor bug which would prevent unreachable dirports
17817 from getting suppressed in the published descriptor.
17818 - When the controller gave us a new descriptor, we weren't resolving
17819 it immediately, so Tor would think its address was 0.0.0.0 until
17820 we fetched a new directory.
17821 - Fix an uppercase/lowercase case error in suppressing a bogus
17822 libevent warning on some Linuxes.
17825 - Begin scrubbing sensitive strings from logs by default. Turn off
17826 the config option SafeLogging if you need to do debugging.
17827 - Switch to a new buffer management algorithm, which tries to avoid
17828 reallocing and copying quite as much. In first tests it looks like
17829 it uses *more* memory on average, but less cpu.
17830 - First cut at support for "create-fast" cells. Clients can use
17831 these when extending to their first hop, since the TLS already
17832 provides forward secrecy and authentication. Not enabled on
17834 - When dirservers refuse a router descriptor, we now log its
17835 contactinfo, platform, and the poster's IP address.
17836 - Call tor_free_all instead of connections_free_all after forking, to
17837 save memory on systems that need to fork.
17838 - Whine at you if you're a server and you don't set your contactinfo.
17839 - Implement --verify-config command-line option to check if your torrc
17840 is valid without actually launching Tor.
17841 - Rewrite address "serifos.exit" to "localhost.serifos.exit"
17842 rather than just rejecting it.
17845 Changes in version 0.1.0.5-rc - 2005-04-27
17847 - Stop trying to print a null pointer if an OR conn fails because
17848 we didn't like its cert.
17850 - Switch our internal buffers implementation to use a ring buffer,
17851 to hopefully improve performance for fast servers a lot.
17852 - Add HttpsProxyAuthenticator support (basic auth only), based
17853 on patch from Adam Langley.
17854 - Bump the default BandwidthRate from 1 MB to 2 MB, to accommodate
17855 the fast servers that have been joining lately.
17856 - Give hidden service accesses extra time on the first attempt,
17857 since 60 seconds is often only barely enough. This might improve
17859 - Improve performance for dirservers: stop re-parsing the whole
17860 directory every time you regenerate it.
17861 - Add more debugging info to help us find the weird dns freebsd
17862 pthreads bug; cleaner debug messages to help track future issues.
17865 Changes in version 0.0.9.9 - 2005-04-23
17866 o Bugfixes on 0.0.9.x:
17867 - If unofficial Tor clients connect and send weird TLS certs, our
17868 Tor server triggers an assert. This release contains a minimal
17869 backport from the broader fix that we put into 0.1.0.4-rc.
17872 Changes in version 0.1.0.4-rc - 2005-04-23
17874 - If unofficial Tor clients connect and send weird TLS certs, our
17875 Tor server triggers an assert. Stop asserting, and start handling
17876 TLS errors better in other situations too.
17877 - When the controller asks us to tell it about all the debug-level
17878 logs, it turns out we were generating debug-level logs while
17879 telling it about them, which turns into a bad loop. Now keep
17880 track of whether you're sending a debug log to the controller,
17881 and don't log when you are.
17882 - Fix the "postdescriptor" feature of the controller interface: on
17883 non-complete success, only say "done" once.
17885 - Clients are now willing to load balance over up to 2mB, not 1mB,
17886 of advertised bandwidth capacity.
17887 - Add a NoPublish config option, so you can be a server (e.g. for
17888 testing running Tor servers in other Tor networks) without
17889 publishing your descriptor to the primary dirservers.
17892 Changes in version 0.1.0.3-rc - 2005-04-08
17893 o Improvements on 0.1.0.2-rc:
17894 - Client now retries when streams end early for 'hibernating' or
17895 'resource limit' reasons, rather than failing them.
17896 - More automated handling for dirserver operators:
17897 - Automatically approve nodes running 0.1.0.2-rc or later,
17898 now that the the reachability detection stuff is working.
17899 - Now we allow two unverified servers with the same nickname
17900 but different keys. But if a nickname is verified, only that
17901 nickname+key are allowed.
17902 - If you're an authdirserver connecting to an address:port,
17903 and it's not the OR you were expecting, forget about that
17904 descriptor. If he *was* the one you were expecting, then forget
17905 about all other descriptors for that address:port.
17906 - Allow servers to publish descriptors from 12 hours in the future.
17907 Corollary: only whine about clock skew from the dirserver if
17908 he's a trusted dirserver (since now even verified servers could
17909 have quite wrong clocks).
17910 - Adjust maximum skew and age for rendezvous descriptors: let skew
17911 be 48 hours rather than 90 minutes.
17912 - Efficiency improvements:
17913 - Keep a big splay tree of (circid,orconn)->circuit mappings to make
17914 it much faster to look up a circuit for each relay cell.
17915 - Remove most calls to assert_all_pending_dns_resolves_ok(),
17916 since they're eating our cpu on exit nodes.
17917 - Stop wasting time doing a case insensitive comparison for every
17918 dns name every time we do any lookup. Canonicalize the names to
17919 lowercase and be done with it.
17920 - Start sending 'truncated' cells back rather than destroy cells,
17921 if the circuit closes in front of you. This means we won't have
17922 to abandon partially built circuits.
17923 - Only warn once per nickname from add_nickname_list_to_smartlist
17924 per failure, so an entrynode or exitnode choice that's down won't
17926 - Put a note in the torrc about abuse potential with the default
17928 - Revise control spec and implementation to allow all log messages to
17929 be sent to controller with their severities intact (suggested by
17930 Matt Edman). Update TorControl to handle new log event types.
17931 - Provide better explanation messages when controller's POSTDESCRIPTOR
17933 - Stop putting nodename in the Platform string in server descriptors.
17934 It doesn't actually help, and it is confusing/upsetting some people.
17936 o Bugfixes on 0.1.0.2-rc:
17937 - We were printing the host mask wrong in exit policies in server
17938 descriptors. This isn't a critical bug though, since we were still
17939 obeying the exit policy internally.
17940 - Fix Tor when compiled with libevent but without pthreads: move
17941 connection_unregister() from _connection_free() to
17943 - Fix an assert trigger (already fixed in 0.0.9.x): when we have
17944 the rare mysterious case of accepting a conn on 0.0.0.0:0, then
17945 when we look through the connection array, we'll find any of the
17946 cpu/dnsworkers. This is no good.
17948 o Bugfixes on 0.0.9.8:
17949 - Fix possible bug on threading platforms (e.g. win32) which was
17950 leaking a file descriptor whenever a cpuworker or dnsworker died.
17951 - When using preferred entry or exit nodes, ignore whether the
17952 circuit wants uptime or capacity. They asked for the nodes, they
17954 - chdir() to your datadirectory at the *end* of the daemonize process,
17955 not the beginning. This was a problem because the first time you
17956 run tor, if your datadir isn't there, and you have runasdaemon set
17957 to 1, it will try to chdir to it before it tries to create it. Oops.
17958 - Handle changed router status correctly when dirserver reloads
17959 fingerprint file. We used to be dropping all unverified descriptors
17960 right then. The bug was hidden because we would immediately
17961 fetch a directory from another dirserver, which would include the
17962 descriptors we just dropped.
17963 - When we're connecting to an OR and he's got a different nickname/key
17964 than we were expecting, only complain loudly if we're an OP or a
17965 dirserver. Complaining loudly to the OR admins just confuses them.
17966 - Tie MAX_DIR_SIZE to MAX_BUF_SIZE, so now directory sizes won't get
17967 artificially capped at 500kB.
17970 Changes in version 0.0.9.8 - 2005-04-07
17971 o Bugfixes on 0.0.9.x:
17972 - We have a bug that I haven't found yet. Sometimes, very rarely,
17973 cpuworkers get stuck in the 'busy' state, even though the cpuworker
17974 thinks of itself as idle. This meant that no new circuits ever got
17975 established. Here's a workaround to kill any cpuworker that's been
17976 busy for more than 100 seconds.
17979 Changes in version 0.1.0.2-rc - 2005-04-01
17980 o Bugfixes on 0.1.0.1-rc:
17981 - Fixes on reachability detection:
17982 - Don't check for reachability while hibernating.
17983 - If ORPort is reachable but DirPort isn't, still publish the
17984 descriptor, but zero out DirPort until it's found reachable.
17985 - When building testing circs for ORPort testing, use only
17986 high-bandwidth nodes, so fewer circuits fail.
17987 - Complain about unreachable ORPort separately from unreachable
17988 DirPort, so the user knows what's going on.
17989 - Make sure we only conclude ORPort reachability if we didn't
17990 initiate the conn. Otherwise we could falsely conclude that
17991 we're reachable just because we connected to the guy earlier
17992 and he used that same pipe to extend to us.
17993 - Authdirservers shouldn't do ORPort reachability detection,
17994 since they're in clique mode, so it will be rare to find a
17995 server not already connected to them.
17996 - When building testing circuits, always pick middle hops running
17997 Tor 0.0.9.7, so we avoid the "can't extend to unknown routers"
17998 bug. (This is a kludge; it will go away when 0.0.9.x becomes
18000 - When we decide we're reachable, actually publish our descriptor
18002 - Fix bug in redirectstream in the controller.
18003 - Fix the state descriptor strings so logs don't claim edge streams
18004 are in a different state than they actually are.
18005 - Use recent libevent features when possible (this only really affects
18006 win32 and osx right now, because the new libevent with these
18007 features hasn't been released yet). Add code to suppress spurious
18009 - Prevent possible segfault in connection_close_unattached_ap().
18010 - Fix newlines on torrc in win32.
18011 - Improve error msgs when tor-resolve fails.
18013 o Improvements on 0.0.9.x:
18014 - New experimental script tor/contrib/ExerciseServer.py (needs more
18015 work) that uses the controller interface to build circuits and
18016 fetch pages over them. This will help us bootstrap servers that
18017 have lots of capacity but haven't noticed it yet.
18018 - New experimental script tor/contrib/PathDemo.py (needs more work)
18019 that uses the controller interface to let you choose whole paths
18021 "<hostname>.<path,separated by dots>.<length of path>.path"
18022 - When we've connected to an OR and handshaked but didn't like
18023 the result, we were closing the conn without sending destroy
18024 cells back for pending circuits. Now send those destroys.
18027 Changes in version 0.0.9.7 - 2005-04-01
18028 o Bugfixes on 0.0.9.x:
18029 - Fix another race crash bug (thanks to Glenn Fink for reporting).
18030 - Compare identity to identity, not to nickname, when extending to
18031 a router not already in the directory. This was preventing us from
18032 extending to unknown routers. Oops.
18033 - Make sure to create OS X Tor user in <500 range, so we aren't
18034 creating actual system users.
18035 - Note where connection-that-hasn't-sent-end was marked, and fix
18036 a few really loud instances of this harmless bug (it's fixed more
18040 Changes in version 0.1.0.1-rc - 2005-03-28
18042 - Add reachability testing. Your Tor server will automatically try
18043 to see if its ORPort and DirPort are reachable from the outside,
18044 and it won't upload its descriptor until it decides they are.
18045 - Handle unavailable hidden services better. Handle slow or busy
18046 hidden services better.
18047 - Add support for CONNECTing through https proxies, with "HttpsProxy"
18049 - New exit policy: accept most low-numbered ports, rather than
18050 rejecting most low-numbered ports.
18051 - More Tor controller support (still experimental). See
18052 http://tor.eff.org/doc/control-spec.txt for all the new features,
18053 including signals to emulate unix signals from any platform;
18054 redirectstream; extendcircuit; mapaddress; getinfo; postdescriptor;
18055 closestream; closecircuit; etc.
18056 - Make nt services work and start on startup on win32 (based on
18057 patch by Matt Edman).
18058 - Add a new AddressMap config directive to rewrite incoming socks
18059 addresses. This lets you, for example, declare an implicit
18060 required exit node for certain sites.
18061 - Add a new TrackHostExits config directive to trigger addressmaps
18062 for certain incoming socks addresses -- for sites that break when
18063 your exit keeps changing (based on patch by Mike Perry).
18064 - Redo the client-side dns cache so it's just an addressmap too.
18065 - Notice when our IP changes, and reset stats/uptime/reachability.
18066 - When an application is using socks5, give him the whole variety of
18067 potential socks5 responses (connect refused, host unreachable, etc),
18068 rather than just "success" or "failure".
18069 - A more sane version numbering system. See
18070 http://tor.eff.org/cvs/tor/doc/version-spec.txt for details.
18071 - New contributed script "exitlist": a simple python script to
18072 parse directories and find Tor nodes that exit to listed
18074 - New contributed script "privoxy-tor-toggle" to toggle whether
18075 Privoxy uses Tor. Seems to be configured for Debian by default.
18076 - Report HTTP reasons to client when getting a response from directory
18077 servers -- so you can actually know what went wrong.
18078 - New config option MaxAdvertisedBandwidth which lets you advertise
18079 a low bandwidthrate (to not attract as many circuits) while still
18080 allowing a higher bandwidthrate in reality.
18082 o Robustness/stability fixes:
18083 - Make Tor use Niels Provos's libevent instead of its current
18084 poll-but-sometimes-select mess. This will let us use faster async
18085 cores (like epoll, kpoll, and /dev/poll), and hopefully work better
18087 - pthread support now too. This was forced because when we forked,
18088 we ended up wasting a lot of duplicate ram over time. Also switch
18089 to foo_r versions of some library calls to allow reentry and
18091 - Better handling for heterogeneous / unreliable nodes:
18092 - Annotate circuits w/ whether they aim to contain high uptime nodes
18093 and/or high capacity nodes. When building circuits, choose
18095 - This means that every single node in an intro rend circuit,
18096 not just the last one, will have a minimum uptime.
18097 - New config option LongLivedPorts to indicate application streams
18098 that will want high uptime circuits.
18099 - Servers reset uptime when a dir fetch entirely fails. This
18100 hopefully reflects stability of the server's network connectivity.
18101 - If somebody starts his tor server in Jan 2004 and then fixes his
18102 clock, don't make his published uptime be a year.
18103 - Reset published uptime when you wake up from hibernation.
18104 - Introduce a notion of 'internal' circs, which are chosen without
18105 regard to the exit policy of the last hop. Intro and rendezvous
18106 circs must be internal circs, to avoid leaking information. Resolve
18107 and connect streams can use internal circs if they want.
18108 - New circuit pooling algorithm: make sure to have enough circs around
18109 to satisfy any predicted ports, and also make sure to have 2 internal
18110 circs around if we've required internal circs lately (and with high
18111 uptime if we've seen that lately too).
18112 - Split NewCircuitPeriod option into NewCircuitPeriod (30 secs),
18113 which describes how often we retry making new circuits if current
18114 ones are dirty, and MaxCircuitDirtiness (10 mins), which describes
18115 how long we're willing to make use of an already-dirty circuit.
18116 - Cannibalize GENERAL circs to be C_REND, C_INTRO, S_INTRO, and S_REND
18117 circ as necessary, if there are any completed ones lying around
18118 when we try to launch one.
18119 - Make hidden services try to establish a rendezvous for 30 seconds,
18120 rather than for n (where n=3) attempts to build a circuit.
18121 - Change SHUTDOWN_WAIT_LENGTH from a fixed 30 secs to a config option
18122 "ShutdownWaitLength".
18123 - Try to be more zealous about calling connection_edge_end when
18124 things go bad with edge conns in connection.c.
18125 - Revise tor-spec to add more/better stream end reasons.
18126 - Revise all calls to connection_edge_end to avoid sending "misc",
18127 and to take errno into account where possible.
18130 - Fix a race condition that can trigger an assert, when we have a
18131 pending create cell and an OR connection fails right then.
18132 - Fix several double-mark-for-close bugs, e.g. where we were finding
18133 a conn for a cell even if that conn is already marked for close.
18134 - Make sequence of log messages when starting on win32 with no config
18135 file more reasonable.
18136 - When choosing an exit node for a new non-internal circ, don't take
18137 into account whether it'll be useful for any pending x.onion
18138 addresses -- it won't.
18139 - Turn addr_policy_compare from a tristate to a quadstate; this should
18140 help address our "Ah, you allow 1.2.3.4:80. You are a good choice
18141 for google.com" problem.
18142 - Make "platform" string in descriptor more accurate for Win32 servers,
18143 so it's not just "unknown platform".
18144 - Fix an edge case in parsing config options (thanks weasel).
18145 If they say "--" on the commandline, it's not an option.
18146 - Reject odd-looking addresses at the client (e.g. addresses that
18147 contain a colon), rather than having the server drop them because
18149 - tor-resolve requests were ignoring .exit if there was a working circuit
18150 they could use instead.
18151 - REUSEADDR on normal platforms means you can rebind to the port
18152 right after somebody else has let it go. But REUSEADDR on win32
18153 means to let you bind to the port _even when somebody else
18154 already has it bound_! So, don't do that on Win32.
18155 - Change version parsing logic: a version is "obsolete" if it is not
18156 recommended and (1) there is a newer recommended version in the
18157 same series, or (2) there are no recommended versions in the same
18158 series, but there are some recommended versions in a newer series.
18159 A version is "new" if it is newer than any recommended version in
18161 - Stop most cases of hanging up on a socks connection without sending
18165 - Require BandwidthRate to be at least 20kB/s for servers.
18166 - When a dirserver causes you to give a warn, mention which dirserver
18168 - New config option DirAllowPrivateAddresses for authdirservers.
18169 Now by default they refuse router descriptors that have non-IP or
18170 private-IP addresses.
18171 - Stop publishing socksport in the directory, since it's not
18172 actually meant to be public. For compatibility, publish a 0 there
18174 - Change DirFetchPeriod/StatusFetchPeriod to have a special "Be
18175 smart" value, that is low for servers and high for clients.
18176 - If our clock jumps forward by 100 seconds or more, assume something
18177 has gone wrong with our network and abandon all not-yet-used circs.
18178 - Warn when exit policy implicitly allows local addresses.
18179 - If we get an incredibly skewed timestamp from a dirserver mirror
18180 that isn't a verified OR, don't warn -- it's probably him that's
18182 - Since we ship our own Privoxy on OS X, tweak it so it doesn't write
18183 cookies to disk and doesn't log each web request to disk. (Thanks
18184 to Brett Carrington for pointing this out.)
18185 - When a client asks us for a dir mirror and we don't have one,
18186 launch an attempt to get a fresh one.
18187 - If we're hibernating and we get a SIGINT, exit immediately.
18188 - Add --with-dmalloc ./configure option, to track memory leaks.
18189 - And try to free all memory on closing, so we can detect what
18191 - Cache local dns resolves correctly even when they're .exit
18193 - Give a better warning when some other server advertises an
18194 ORPort that is actually an apache running ssl.
18195 - Add "opt hibernating 1" to server descriptor to make it clearer
18196 whether the server is hibernating.
18199 Changes in version 0.0.9.6 - 2005-03-24
18200 o Bugfixes on 0.0.9.x (crashes and asserts):
18201 - Add new end stream reasons to maintainance branch. Fix bug where
18202 reason (8) could trigger an assert. Prevent bug from recurring.
18203 - Apparently win32 stat wants paths to not end with a slash.
18204 - Fix assert triggers in assert_cpath_layer_ok(), where we were
18205 blowing away the circuit that conn->cpath_layer points to, then
18206 checking to see if the circ is well-formed. Backport check to make
18207 sure we dont use the cpath on a closed connection.
18208 - Prevent circuit_resume_edge_reading_helper() from trying to package
18209 inbufs for marked-for-close streams.
18210 - Don't crash on hup if your options->address has become unresolvable.
18211 - Some systems (like OS X) sometimes accept() a connection and tell
18212 you the remote host is 0.0.0.0:0. If this happens, due to some
18213 other mis-features, we get confused; so refuse the conn for now.
18215 o Bugfixes on 0.0.9.x (other):
18216 - Fix harmless but scary "Unrecognized content encoding" warn message.
18217 - Add new stream error reason: TORPROTOCOL reason means "you are not
18218 speaking a version of Tor I understand; say bye-bye to your stream."
18219 - Be willing to cache directories from up to ROUTER_MAX_AGE seconds
18220 into the future, now that we are more tolerant of skew. This
18221 resolves a bug where a Tor server would refuse to cache a directory
18222 because all the directories it gets are too far in the future;
18223 yet the Tor server never logs any complaints about clock skew.
18224 - Mac packaging magic: make man pages useable, and do not overwrite
18225 existing torrc files.
18226 - Make OS X log happily to /var/log/tor/tor.log
18229 Changes in version 0.0.9.5 - 2005-02-22
18230 o Bugfixes on 0.0.9.x:
18231 - Fix an assert race at exit nodes when resolve requests fail.
18232 - Stop picking unverified dir mirrors--it only leads to misery.
18233 - Patch from Matt Edman to make NT services work better. Service
18234 support is still not compiled into the executable by default.
18235 - Patch from Dmitri Bely so the Tor service runs better under
18236 the win32 SYSTEM account.
18237 - Make tor-resolve actually work (?) on Win32.
18238 - Fix a sign bug when getrlimit claims to have 4+ billion
18239 file descriptors available.
18240 - Stop refusing to start when bandwidthburst == bandwidthrate.
18241 - When create cells have been on the onion queue more than five
18242 seconds, just send back a destroy and take them off the list.
18245 Changes in version 0.0.9.4 - 2005-02-03
18246 o Bugfixes on 0.0.9:
18247 - Fix an assert bug that took down most of our servers: when
18248 a server claims to have 1 GB of bandwidthburst, don't
18250 - Don't crash as badly if we have spawned the max allowed number
18251 of dnsworkers, or we're out of file descriptors.
18252 - Block more file-sharing ports in the default exit policy.
18253 - MaxConn is now automatically set to the hard limit of max
18254 file descriptors we're allowed (ulimit -n), minus a few for
18256 - Give a clearer message when servers need to raise their
18257 ulimit -n when they start running out of file descriptors.
18258 - SGI Compatibility patches from Jan Schaumann.
18259 - Tolerate a corrupt cached directory better.
18260 - When a dirserver hasn't approved your server, list which one.
18261 - Go into soft hibernation after 95% of the bandwidth is used,
18262 not 99%. This is especially important for daily hibernators who
18263 have a small accounting max. Hopefully it will result in fewer
18264 cut connections when the hard hibernation starts.
18265 - Load-balance better when using servers that claim more than
18266 800kB/s of capacity.
18267 - Make NT services work (experimental, only used if compiled in).
18270 Changes in version 0.0.9.3 - 2005-01-21
18271 o Bugfixes on 0.0.9:
18272 - Backport the cpu use fixes from main branch, so busy servers won't
18273 need as much processor time.
18274 - Work better when we go offline and then come back, or when we
18275 run Tor at boot before the network is up. We do this by
18276 optimistically trying to fetch a new directory whenever an
18277 application request comes in and we think we're offline -- the
18278 human is hopefully a good measure of when the network is back.
18279 - Backport some minimal hidserv bugfixes: keep rend circuits open as
18280 long as you keep using them; actually publish hidserv descriptors
18281 shortly after they change, rather than waiting 20-40 minutes.
18282 - Enable Mac startup script by default.
18283 - Fix duplicate dns_cancel_pending_resolve reported by Giorgos Pallas.
18284 - When you update AllowUnverifiedNodes or FirewallPorts via the
18285 controller's setconf feature, we were always appending, never
18287 - When you update HiddenServiceDir via setconf, it was screwing up
18288 the order of reading the lines, making it fail.
18289 - Do not rewrite a cached directory back to the cache; otherwise we
18290 will think it is recent and not fetch a newer one on startup.
18291 - Workaround for webservers that lie about Content-Encoding: Tor
18292 now tries to autodetect compressed directories and compression
18293 itself. This lets us Proxypass dir fetches through apache.
18296 Changes in version 0.0.9.2 - 2005-01-04
18297 o Bugfixes on 0.0.9 (crashes and asserts):
18298 - Fix an assert on startup when the disk is full and you're logging
18300 - If you do socks4 with an IP of 0.0.0.x but *don't* provide a socks4a
18301 style address, then we'd crash.
18302 - Fix an assert trigger when the running-routers string we get from
18303 a dirserver is broken.
18304 - Make worker threads start and run on win32. Now win32 servers
18306 - Bandaid (not actually fix, but now it doesn't crash) an assert
18307 where the dns worker dies mysteriously and the main Tor process
18308 doesn't remember anything about the address it was resolving.
18310 o Bugfixes on 0.0.9 (Win32):
18311 - Workaround for brain-damaged __FILE__ handling on MSVC: keep Nick's
18312 name out of the warning/assert messages.
18313 - Fix a superficial "unhandled error on read" bug on win32.
18314 - The win32 installer no longer requires a click-through for our
18315 license, since our Free Software license grants rights but does not
18317 - Win32: When connecting to a dirserver fails, try another one
18318 immediately. (This was already working for non-win32 Tors.)
18319 - Stop trying to parse $HOME on win32 when hunting for default
18321 - Make tor-resolve.c work on win32 by calling network_init().
18323 o Bugfixes on 0.0.9 (other):
18324 - Make 0.0.9.x build on Solaris again.
18325 - Due to a fencepost error, we were blowing away the \n when reporting
18326 confvalue items in the controller. So asking for multiple config
18327 values at once couldn't work.
18328 - When listing circuits that are pending on an opening OR connection,
18329 if we're an OR we were listing circuits that *end* at us as
18330 being pending on every listener, dns/cpu worker, etc. Stop that.
18331 - Dirservers were failing to create 'running-routers' or 'directory'
18332 strings if we had more than some threshold of routers. Fix them so
18333 they can handle any number of routers.
18334 - Fix a superficial "Duplicate mark for close" bug.
18335 - Stop checking for clock skew for OR connections, even for servers.
18336 - Fix a fencepost error that was chopping off the last letter of any
18337 nickname that is the maximum allowed nickname length.
18338 - Update URLs in log messages so they point to the new website.
18339 - Fix a potential problem in mangling server private keys while
18340 writing to disk (not triggered yet, as far as we know).
18341 - Include the licenses for other free software we include in Tor,
18342 now that we're shipping binary distributions more regularly.
18345 Changes in version 0.0.9.1 - 2004-12-15
18346 o Bugfixes on 0.0.9:
18347 - Make hibernation actually work.
18348 - Make HashedControlPassword config option work.
18349 - When we're reporting event circuit status to a controller,
18350 don't use the stream status code.
18353 Changes in version 0.0.9 - 2004-12-12
18355 - Clean up manpage and torrc.sample file.
18356 - Clean up severities and text of log warnings.
18358 - Make servers trigger an assert when they enter hibernation.
18361 Changes in version 0.0.9rc7 - 2004-12-08
18362 o Bugfixes on 0.0.9rc:
18363 - Fix a stack-trashing crash when an exit node begins hibernating.
18364 - Avoid looking at unallocated memory while considering which
18365 ports we need to build circuits to cover.
18366 - Stop a sigpipe: when an 'end' cell races with eof from the app,
18367 we shouldn't hold-open-until-flush if the eof arrived first.
18368 - Fix a bug with init_cookie_authentication() in the controller.
18369 - When recommending new-format log lines, if the upper bound is
18370 LOG_ERR, leave it implicit.
18372 o Bugfixes on 0.0.8.1:
18373 - Fix a whole slew of memory leaks.
18374 - Fix isspace() and friends so they still make Solaris happy
18375 but also so they don't trigger asserts on win32.
18376 - Fix parse_iso_time on platforms without strptime (eg win32).
18377 - win32: tolerate extra "readable" events better.
18378 - win32: when being multithreaded, leave parent fdarray open.
18379 - Make unit tests work on win32.
18382 Changes in version 0.0.9rc6 - 2004-12-06
18383 o Bugfixes on 0.0.9pre:
18384 - Clean up some more integer underflow opportunities (not exploitable
18386 - While hibernating, hup should not regrow our listeners.
18387 - Send an end to the streams we close when we hibernate, rather
18388 than just chopping them off.
18389 - React to eof immediately on non-open edge connections.
18391 o Bugfixes on 0.0.8.1:
18392 - Calculate timeout for waiting for a connected cell from the time
18393 we sent the begin cell, not from the time the stream started. If
18394 it took a long time to establish the circuit, we would time out
18395 right after sending the begin cell.
18396 - Fix router_compare_addr_to_addr_policy: it was not treating a port
18397 of * as always matching, so we were picking reject *:* nodes as
18398 exit nodes too. Oops.
18401 - New circuit building strategy: keep a list of ports that we've
18402 used in the past 6 hours, and always try to have 2 circuits open
18403 or on the way that will handle each such port. Seed us with port
18404 80 so web users won't complain that Tor is "slow to start up".
18405 - Make kill -USR1 dump more useful stats about circuits.
18406 - When warning about retrying or giving up, print the address, so
18407 the user knows which one it's talking about.
18408 - If you haven't used a clean circuit in an hour, throw it away,
18409 just to be on the safe side. (This means after 6 hours a totally
18410 unused Tor client will have no circuits open.)
18413 Changes in version 0.0.9rc5 - 2004-12-01
18414 o Bugfixes on 0.0.8.1:
18415 - Disallow NDEBUG. We don't ever want anybody to turn off debug.
18416 - Let resolve conns retry/expire also, rather than sticking around
18418 - If we are using select, make sure we stay within FD_SETSIZE.
18420 o Bugfixes on 0.0.9pre:
18421 - Fix integer underflow in tor_vsnprintf() that may be exploitable,
18422 but doesn't seem to be currently; thanks to Ilja van Sprundel for
18424 - If anybody set DirFetchPostPeriod, give them StatusFetchPeriod
18425 instead. Impose minima and maxima for all *Period options; impose
18426 even tighter maxima for fetching if we are a caching dirserver.
18427 Clip rather than rejecting.
18428 - Fetch cached running-routers from servers that serve it (that is,
18429 authdirservers and servers running 0.0.9rc5-cvs or later.)
18432 - Accept *:706 (silc) in default exit policy.
18433 - Implement new versioning format for post 0.1.
18434 - Support "foo.nickname.exit" addresses, to let Alice request the
18435 address "foo" as viewed by exit node "nickname". Based on a patch
18437 - Make tor --version --version dump the cvs Id of every file.
18440 Changes in version 0.0.9rc4 - 2004-11-28
18441 o Bugfixes on 0.0.8.1:
18442 - Make windows sockets actually non-blocking (oops), and handle
18443 win32 socket errors better.
18445 o Bugfixes on 0.0.9rc1:
18446 - Actually catch the -USR2 signal.
18449 Changes in version 0.0.9rc3 - 2004-11-25
18450 o Bugfixes on 0.0.8.1:
18451 - Flush the log file descriptor after we print "Tor opening log file",
18452 so we don't see those messages days later.
18454 o Bugfixes on 0.0.9rc1:
18455 - Make tor-resolve work again.
18456 - Avoid infinite loop in tor-resolve if tor hangs up on it.
18457 - Fix an assert trigger for clients/servers handling resolves.
18460 Changes in version 0.0.9rc2 - 2004-11-24
18461 o Bugfixes on 0.0.9rc1:
18462 - I broke socks5 support while fixing the eof bug.
18463 - Allow unitless bandwidths and intervals; they default to bytes
18465 - New servers don't start out hibernating; they are active until
18466 they run out of bytes, so they have a better estimate of how
18467 long it takes, and so their operators can know they're working.
18470 Changes in version 0.0.9rc1 - 2004-11-23
18471 o Bugfixes on 0.0.8.1:
18472 - Finally fix a bug that's been plaguing us for a year:
18473 With high load, circuit package window was reaching 0. Whenever
18474 we got a circuit-level sendme, we were reading a lot on each
18475 socket, but only writing out a bit. So we would eventually reach
18476 eof. This would be noticed and acted on even when there were still
18477 bytes sitting in the inbuf.
18478 - When poll() is interrupted, we shouldn't believe the revents values.
18480 o Bugfixes on 0.0.9pre6:
18481 - Fix hibernate bug that caused pre6 to be broken.
18482 - Don't keep rephist info for routers that haven't had activity for
18483 24 hours. (This matters now that clients have keys, since we track
18485 - Never call close_temp_logs while validating log options.
18486 - Fix backslash-escaping on tor.sh.in and torctl.in.
18489 - Implement weekly/monthly/daily accounting: now you specify your
18490 hibernation properties by
18491 AccountingMax N bytes|KB|MB|GB|TB
18492 AccountingStart day|week|month [day] HH:MM
18493 Defaults to "month 1 0:00".
18494 - Let bandwidth and interval config options be specified as 5 bytes,
18495 kb, kilobytes, etc; and as seconds, minutes, hours, days, weeks.
18496 - kill -USR2 now moves all logs to loglevel debug (kill -HUP to
18497 get back to normal.)
18498 - If your requested entry or exit node has advertised bandwidth 0,
18500 - Be more greedy about filling up relay cells -- we try reading again
18501 once we've processed the stuff we read, in case enough has arrived
18502 to fill the last cell completely.
18503 - Apply NT service patch from Osamu Fujino. Still needs more work.
18506 Changes in version 0.0.9pre6 - 2004-11-15
18507 o Bugfixes on 0.0.8.1:
18508 - Fix assert failure on malformed socks4a requests.
18509 - Use identity comparison, not nickname comparison, to choose which
18510 half of circuit-ID-space each side gets to use. This is needed
18511 because sometimes we think of a router as a nickname, and sometimes
18512 as a hex ID, and we can't predict what the other side will do.
18513 - Catch and ignore SIGXFSZ signals when log files exceed 2GB; our
18514 write() call will fail and we handle it there.
18515 - Add a FAST_SMARTLIST define to optionally inline smartlist_get
18516 and smartlist_len, which are two major profiling offenders.
18518 o Bugfixes on 0.0.9pre5:
18519 - Fix a bug in read_all that was corrupting config files on windows.
18520 - When we're raising the max number of open file descriptors to
18521 'unlimited', don't log that we just raised it to '-1'.
18522 - Include event code with events, as required by control-spec.txt.
18523 - Don't give a fingerprint when clients do --list-fingerprint:
18524 it's misleading, because it will never be the same again.
18525 - Stop using strlcpy in tor_strndup, since it was slowing us
18527 - Remove warn on startup about missing cached-directory file.
18528 - Make kill -USR1 work again.
18529 - Hibernate if we start tor during the "wait for wakeup-time" phase
18530 of an accounting interval. Log our hibernation plans better.
18531 - Authoritative dirservers now also cache their directory, so they
18532 have it on start-up.
18535 - Fetch running-routers; cache running-routers; compress
18536 running-routers; serve compressed running-routers.z
18537 - Add NSI installer script contributed by J Doe.
18538 - Commit VC6 and VC7 workspace/project files.
18539 - Commit a tor.spec for making RPM files, with help from jbash.
18540 - Add contrib/torctl.in contributed by Glenn Fink.
18541 - Implement the control-spec's SAVECONF command, to write your
18542 configuration to torrc.
18543 - Get cookie authentication for the controller closer to working.
18544 - Include control-spec.txt in the tarball.
18545 - When set_conf changes our server descriptor, upload a new copy.
18546 But don't upload it too often if there are frequent changes.
18547 - Document authentication config in man page, and document signals
18549 - Clean up confusing parts of man page and torrc.sample.
18550 - Make expand_filename handle ~ and ~username.
18551 - Use autoconf to enable largefile support where necessary. Use
18552 ftello where available, since ftell can fail at 2GB.
18553 - Distinguish between TOR_TLS_CLOSE and TOR_TLS_ERROR, so we can
18554 log more informatively.
18555 - Give a slightly more useful output for "tor -h".
18556 - Refuse application socks connections to port 0.
18557 - Check clock skew for verified servers, but allow unverified
18558 servers and clients to have any clock skew.
18559 - Break DirFetchPostPeriod into:
18560 - DirFetchPeriod for fetching full directory,
18561 - StatusFetchPeriod for fetching running-routers,
18562 - DirPostPeriod for posting server descriptor,
18563 - RendPostPeriod for posting hidden service descriptors.
18564 - Make sure the hidden service descriptors are at a random offset
18565 from each other, to hinder linkability.
18568 Changes in version 0.0.9pre5 - 2004-11-09
18569 o Bugfixes on 0.0.9pre4:
18570 - Fix a seg fault in unit tests (doesn't affect main program).
18571 - Fix an assert bug where a hidden service provider would fail if
18572 the first hop of his rendezvous circuit was down.
18573 - Hidden service operators now correctly handle version 1 style
18574 INTRODUCE1 cells (nobody generates them still, so not a critical
18576 - If do_hup fails, actually notice.
18577 - Handle more errnos from accept() without closing the listener.
18578 Some OpenBSD machines were closing their listeners because
18579 they ran out of file descriptors.
18580 - Send resolve cells to exit routers that are running a new
18581 enough version of the resolve code to work right.
18582 - Better handling of winsock includes on non-MSV win32 compilers.
18583 - Some people had wrapped their tor client/server in a script
18584 that would restart it whenever it died. This did not play well
18585 with our "shut down if your version is obsolete" code. Now people
18586 don't fetch a new directory if their local cached version is
18588 - Make our autogen.sh work on ksh as well as bash.
18591 - Hibernation: New config option "AccountingMaxKB" lets you
18592 set how many KBytes per month you want to allow your server to
18593 consume. Rather than spreading those bytes out evenly over the
18594 month, we instead hibernate for some of the month and pop up
18595 at a deterministic time, work until the bytes are consumed, then
18596 hibernate again. Config option "MonthlyAccountingStart" lets you
18597 specify which day of the month your billing cycle starts on.
18598 - Control interface: a separate program can now talk to your
18599 client/server over a socket, and get/set config options, receive
18600 notifications of circuits and streams starting/finishing/dying,
18601 bandwidth used, etc. The next step is to get some GUIs working.
18602 Let us know if you want to help out. See doc/control-spec.txt .
18603 - Ship a contrib/tor-control.py as an example script to interact
18604 with the control port.
18605 - "tor --hash-password zzyxz" will output a salted password for
18606 use in authenticating to the control interface.
18607 - New log format in config:
18608 "Log minsev[-maxsev] stdout|stderr|syslog" or
18609 "Log minsev[-maxsev] file /var/foo"
18612 - DirPolicy config option, to let people reject incoming addresses
18613 from their dirserver.
18614 - "tor --list-fingerprint" will list your identity key fingerprint
18616 - Add "pass" target for RedirectExit, to make it easier to break
18617 out of a sequence of RedirectExit rules.
18618 - Clients now generate a TLS cert too, in preparation for having
18619 them act more like real nodes.
18620 - Ship src/win32/ in the tarball, so people can use it to build.
18621 - Make old win32 fall back to CWD if SHGetSpecialFolderLocation
18623 - New "router-status" line in directory, to better bind each verified
18624 nickname to its identity key.
18625 - Deprecate unofficial config option abbreviations, and abbreviations
18626 not on the command line.
18627 - Add a pure-C tor-resolve implementation.
18628 - Use getrlimit and friends to ensure we can reach MaxConn (currently
18629 1024) file descriptors.
18631 o Code security improvements, inspired by Ilja:
18632 - Replace sprintf with snprintf. (I think they were all safe, but
18634 - Replace strcpy/strncpy with strlcpy in more places.
18635 - Avoid strcat; use snprintf or strlcat instead.
18636 - snprintf wrapper with consistent (though not C99) overflow behavior.
18639 Changes in version 0.0.9pre4 - 2004-10-17
18640 o Bugfixes on 0.0.9pre3:
18641 - If the server doesn't specify an exit policy, use the real default
18642 exit policy, not reject *:*.
18643 - Ignore fascistfirewall when uploading/downloading hidden service
18644 descriptors, since we go through Tor for those; and when using
18645 an HttpProxy, since we assume it can reach them all.
18646 - When looking for an authoritative dirserver, use only the ones
18647 configured at boot. Don't bother looking in the directory.
18648 - The rest of the fix for get_default_conf_file() on older win32.
18649 - Make 'Routerfile' config option obsolete.
18652 - New 'MyFamily nick1,...' config option for a server to
18653 specify other servers that shouldn't be used in the same circuit
18654 with it. Only believed if nick1 also specifies us.
18655 - New 'NodeFamily nick1,nick2,...' config option for a client to
18656 specify nodes that it doesn't want to use in the same circuit.
18657 - New 'Redirectexit pattern address:port' config option for a
18658 server to redirect exit connections, e.g. to a local squid.
18661 Changes in version 0.0.9pre3 - 2004-10-13
18662 o Bugfixes on 0.0.8.1:
18663 - Better torrc example lines for dirbindaddress and orbindaddress.
18664 - Improved bounds checking on parsed ints (e.g. config options and
18665 the ones we find in directories.)
18666 - Better handling of size_t vs int, so we're more robust on 64
18668 - Fix the rest of the bug where a newly started OR would appear
18669 as unverified even after we've added his fingerprint and hupped
18671 - Fix a bug from 0.0.7: when read() failed on a stream, we would
18672 close it without sending back an end. So 'connection refused'
18673 would simply be ignored and the user would get no response.
18675 o Bugfixes on 0.0.9pre2:
18676 - Serving the cached-on-disk directory to people is bad. We now
18677 provide no directory until we've fetched a fresh one.
18678 - Workaround for bug on windows where cached-directories get crlf
18680 - Make get_default_conf_file() work on older windows too.
18681 - If we write a *:* exit policy line in the descriptor, don't write
18682 any more exit policy lines.
18685 - Use only 0.0.9pre1 and later servers for resolve cells.
18686 - Make the dirservers file obsolete.
18687 - Include a dir-signing-key token in directories to tell the
18688 parsing entity which key is being used to sign.
18689 - Remove the built-in bulky default dirservers string.
18690 - New config option "Dirserver %s:%d [fingerprint]", which can be
18691 repeated as many times as needed. If no dirservers specified,
18692 default to moria1,moria2,tor26.
18693 - Make moria2 advertise a dirport of 80, so people behind firewalls
18694 will be able to get a directory.
18695 - Http proxy support
18696 - Dirservers translate requests for http://%s:%d/x to /x
18697 - You can specify "HttpProxy %s[:%d]" and all dir fetches will
18698 be routed through this host.
18699 - Clients ask for /tor/x rather than /x for new enough dirservers.
18700 This way we can one day coexist peacefully with apache.
18701 - Clients specify a "Host: %s%d" http header, to be compatible
18702 with more proxies, and so running squid on an exit node can work.
18705 Changes in version 0.0.8.1 - 2004-10-13
18707 - Fix a seg fault that can be triggered remotely for Tor
18708 clients/servers with an open dirport.
18709 - Fix a rare assert trigger, where routerinfos for entries in
18710 our cpath would expire while we're building the path.
18711 - Fix a bug in OutboundBindAddress so it (hopefully) works.
18712 - Fix a rare seg fault for people running hidden services on
18713 intermittent connections.
18714 - Fix a bug in parsing opt keywords with objects.
18715 - Fix a stale pointer assert bug when a stream detaches and
18717 - Fix a string format vulnerability (probably not exploitable)
18718 in reporting stats locally.
18719 - Fix an assert trigger: sometimes launching circuits can fail
18720 immediately, e.g. because too many circuits have failed recently.
18721 - Fix a compile warning on 64 bit platforms.
18724 Changes in version 0.0.9pre2 - 2004-10-03
18726 - Make fetching a cached directory work for 64-bit platforms too.
18727 - Make zlib.h a required header, not an optional header.
18730 Changes in version 0.0.9pre1 - 2004-10-01
18732 - Stop using separate defaults for no-config-file and
18733 empty-config-file. Now you have to explicitly turn off SocksPort,
18734 if you don't want it open.
18735 - Fix a bug in OutboundBindAddress so it (hopefully) works.
18736 - Improve man page to mention more of the 0.0.8 features.
18737 - Fix a rare seg fault for people running hidden services on
18738 intermittent connections.
18739 - Change our file IO stuff (especially wrt OpenSSL) so win32 is
18741 - Fix more dns related bugs: send back resolve_failed and end cells
18742 more reliably when the resolve fails, rather than closing the
18743 circuit and then trying to send the cell. Also attach dummy resolve
18744 connections to a circuit *before* calling dns_resolve(), to fix
18745 a bug where cached answers would never be sent in RESOLVED cells.
18746 - When we run out of disk space, or other log writing error, don't
18747 crash. Just stop logging to that log and continue.
18748 - We were starting to daemonize before we opened our logs, so if
18749 there were any problems opening logs, we would complain to stderr,
18750 which wouldn't work, and then mysteriously exit.
18751 - Fix a rare bug where sometimes a verified OR would connect to us
18752 before he'd uploaded his descriptor, which would cause us to
18753 assign conn->nickname as though he's unverified. Now we look through
18754 the fingerprint list to see if he's there.
18755 - Fix a rare assert trigger, where routerinfos for entries in
18756 our cpath would expire while we're building the path.
18759 - Clients can ask dirservers for /dir.z to get a compressed version
18760 of the directory. Only works for servers running 0.0.9, of course.
18761 - Make clients cache directories and use them to seed their router
18762 lists at startup. This means clients have a datadir again.
18763 - Configuration infrastructure support for warning on obsolete
18765 - Respond to content-encoding headers by trying to uncompress as
18767 - Reply with a deflated directory when a client asks for "dir.z".
18768 We could use allow-encodings instead, but allow-encodings isn't
18769 specified in HTTP 1.0.
18770 - Raise the max dns workers from 50 to 100.
18771 - Discourage people from setting their dirfetchpostperiod more often
18772 than once per minute.
18773 - Protect dirservers from overzealous descriptor uploading -- wait
18774 10 seconds after directory gets dirty, before regenerating.
18777 Changes in version 0.0.8 - 2004-08-25
18778 o Port it to SunOS 5.9 / Athena
18781 Changes in version 0.0.8rc2 - 2004-08-20
18782 o Make it compile on cygwin again.
18783 o When picking unverified routers, skip those with low uptime and/or
18784 low bandwidth, depending on what properties you care about.
18787 Changes in version 0.0.8rc1 - 2004-08-18
18788 o Changes from 0.0.7.3:
18790 - Fix assert triggers: if the other side returns an address 0.0.0.0,
18791 don't put it into the client dns cache.
18792 - If a begin failed due to exit policy, but we believe the IP address
18793 should have been allowed, switch that router to exitpolicy reject *:*
18794 until we get our next directory.
18796 - Clients choose nodes proportional to advertised bandwidth.
18797 - Avoid using nodes with low uptime as introduction points.
18798 - Handle servers with dynamic IP addresses: don't replace
18799 options->Address with the resolved one at startup, and
18800 detect our address right before we make a routerinfo each time.
18801 - 'FascistFirewall' option to pick dirservers and ORs on specific
18802 ports; plus 'FirewallPorts' config option to tell FascistFirewall
18803 which ports are open. (Defaults to 80,443)
18804 - Be more aggressive about trying to make circuits when the network
18805 has changed (e.g. when you unsuspend your laptop).
18806 - Check for time skew on http headers; report date in response to
18808 - If the entrynode config line has only one node, don't pick it as
18810 - Add strict{entry|exit}nodes config options. If set to 1, then
18811 we refuse to build circuits that don't include the specified entry
18813 - OutboundBindAddress config option, to bind to a specific
18814 IP address for outgoing connect()s.
18815 - End truncated log entries (e.g. directories) with "[truncated]".
18817 o Patches to 0.0.8preX:
18819 - Patches to compile and run on win32 again (maybe)?
18820 - Fix crash when looking for ~/.torrc with no $HOME set.
18821 - Fix a race bug in the unit tests.
18822 - Handle verified/unverified name collisions better when new
18823 routerinfo's arrive in a directory.
18824 - Sometimes routers were getting entered into the stats before
18825 we'd assigned their identity_digest. Oops.
18826 - Only pick and establish intro points after we've gotten a
18829 - AllowUnverifiedNodes config option to let circuits choose no-name
18830 routers in entry,middle,exit,introduction,rendezvous positions.
18831 Allow middle and rendezvous positions by default.
18832 - Add a man page for tor-resolve.
18835 Changes in version 0.0.7.3 - 2004-08-12
18836 o Stop dnsworkers from triggering an assert failure when you
18837 ask them to resolve the host "".
18840 Changes in version 0.0.8pre3 - 2004-08-09
18841 o Changes from 0.0.7.2:
18842 - Allow multiple ORs with same nickname in routerlist -- now when
18843 people give us one identity key for a nickname, then later
18844 another, we don't constantly complain until the first expires.
18845 - Remember used bandwidth (both in and out), and publish 15-minute
18846 snapshots for the past day into our descriptor.
18847 - You can now fetch $DIRURL/running-routers to get just the
18848 running-routers line, not the whole descriptor list. (But
18849 clients don't use this yet.)
18850 - When people mistakenly use Tor as an http proxy, point them
18851 at the tor-doc.html rather than the INSTALL.
18852 - Remove our mostly unused -- and broken -- hex_encode()
18853 function. Use base16_encode() instead. (Thanks to Timo Lindfors
18854 for pointing out this bug.)
18855 - Rotate onion keys every 12 hours, not every 2 hours, so we have
18856 fewer problems with people using the wrong key.
18857 - Change the default exit policy to reject the default edonkey,
18858 kazaa, gnutella ports.
18859 - Add replace_file() to util.[ch] to handle win32's rename().
18861 o Changes from 0.0.8preX:
18862 - Fix two bugs in saving onion keys to disk when rotating, so
18863 hopefully we'll get fewer people using old onion keys.
18864 - Fix an assert error that was making SocksPolicy not work.
18865 - Be willing to expire routers that have an open dirport -- it's
18866 just the authoritative dirservers we want to not forget.
18867 - Reject tor-resolve requests for .onion addresses early, so we
18868 don't build a whole rendezvous circuit and then fail.
18869 - When you're warning a server that he's unverified, don't cry
18870 wolf unpredictably.
18871 - Fix a race condition: don't try to extend onto a connection
18872 that's still handshaking.
18873 - For servers in clique mode, require the conn to be open before
18874 you'll choose it for your path.
18875 - Fix some cosmetic bugs about duplicate mark-for-close, lack of
18876 end relay cell, etc.
18877 - Measure bandwidth capacity over the last 24 hours, not just 12
18878 - Bugfix: authoritative dirservers were making and signing a new
18879 directory for each client, rather than reusing the cached one.
18882 Changes in version 0.0.8pre2 - 2004-08-04
18883 o Changes from 0.0.7.2:
18885 - Check directory signature _before_ you decide whether you're
18886 you're running an obsolete version and should exit.
18887 - Check directory signature _before_ you parse the running-routers
18888 list to decide who's running or verified.
18889 - Bugfixes and features:
18890 - Check return value of fclose while writing to disk, so we don't
18891 end up with broken files when servers run out of disk space.
18892 - Log a warning if the user uses an unsafe socks variant, so people
18893 are more likely to learn about privoxy or socat.
18894 - Dirservers now include RFC1123-style dates in the HTTP headers,
18895 which one day we will use to better detect clock skew.
18897 o Changes from 0.0.8pre1:
18898 - Make it compile without warnings again on win32.
18899 - Log a warning if you're running an unverified server, to let you
18900 know you might want to get it verified.
18901 - Only pick a default nickname if you plan to be a server.
18904 Changes in version 0.0.8pre1 - 2004-07-23
18906 - Made our unit tests compile again on OpenBSD 3.5, and tor
18907 itself compile again on OpenBSD on a sparc64.
18908 - We were neglecting milliseconds when logging on win32, so
18909 everything appeared to happen at the beginning of each second.
18911 o Protocol changes:
18912 - 'Extend' relay cell payloads now include the digest of the
18913 intended next hop's identity key. Now we can verify that we're
18914 extending to the right router, and also extend to routers we
18915 hadn't heard of before.
18918 - Tor nodes can now act as relays (with an advertised ORPort)
18919 without being manually verified by the dirserver operators.
18920 - Uploaded descriptors of unverified routers are now accepted
18921 by the dirservers, and included in the directory.
18922 - Verified routers are listed by nickname in the running-routers
18923 list; unverified routers are listed as "$<fingerprint>".
18924 - We now use hash-of-identity-key in most places rather than
18925 nickname or addr:port, for improved security/flexibility.
18926 - To avoid Sybil attacks, paths still use only verified servers.
18927 But now we have a chance to play around with hybrid approaches.
18928 - Nodes track bandwidth usage to estimate capacity (not used yet).
18929 - ClientOnly option for nodes that never want to become servers.
18930 - Directory caching.
18931 - "AuthoritativeDir 1" option for the official dirservers.
18932 - Now other nodes (clients and servers) will cache the latest
18933 directory they've pulled down.
18934 - They can enable their DirPort to serve it to others.
18935 - Clients will pull down a directory from any node with an open
18936 DirPort, and check the signature/timestamp correctly.
18937 - Authoritative dirservers now fetch directories from other
18938 authdirservers, to stay better synced.
18939 - Running-routers list tells who's down also, along with noting
18940 if they're verified (listed by nickname) or unverified (listed
18942 - Allow dirservers to serve running-router list separately.
18943 This isn't used yet.
18944 - ORs connect-on-demand to other ORs
18945 - If you get an extend cell to an OR you're not connected to,
18946 connect, handshake, and forward the create cell.
18947 - The authoritative dirservers stay connected to everybody,
18948 and everybody stays connected to 0.0.7 servers, but otherwise
18949 clients/servers expire unused connections after 5 minutes.
18950 - When servers get a sigint, they delay 30 seconds (refusing new
18951 connections) then exit. A second sigint causes immediate exit.
18952 - File and name management:
18953 - Look for .torrc if no CONFDIR "torrc" is found.
18954 - If no datadir is defined, then choose, make, and secure ~/.tor
18956 - If torrc not found, exitpolicy reject *:*.
18957 - Expands ~/ in filenames to $HOME/ (but doesn't yet expand ~arma).
18958 - If no nickname is defined, derive default from hostname.
18959 - Rename secret key files, e.g. identity.key -> secret_id_key,
18960 to discourage people from mailing their identity key to tor-ops.
18961 - Refuse to build a circuit before the directory has arrived --
18962 it won't work anyway, since you won't know the right onion keys
18964 - Try other dirservers immediately if the one you try is down. This
18965 should tolerate down dirservers better now.
18966 - Parse tor version numbers so we can do an is-newer-than check
18967 rather than an is-in-the-list check.
18968 - New socks command 'resolve', to let us shim gethostbyname()
18970 - A 'tor_resolve' script to access the socks resolve functionality.
18971 - A new socks-extensions.txt doc file to describe our
18972 interpretation and extensions to the socks protocols.
18973 - Add a ContactInfo option, which gets published in descriptor.
18974 - Publish OR uptime in descriptor (and thus in directory) too.
18975 - Write tor version at the top of each log file
18976 - New docs in the tarball:
18978 - Document that you should proxy your SSL traffic too.
18981 Changes in version 0.0.7.2 - 2004-07-07
18982 o A better fix for the 0.0.0.0 problem, that will hopefully
18983 eliminate the remaining related assertion failures.
18986 Changes in version 0.0.7.1 - 2004-07-04
18987 o When an address resolves to 0.0.0.0, treat it as a failed resolve,
18988 since internally we use 0.0.0.0 to signify "not yet resolved".
18991 Changes in version 0.0.7 - 2004-06-07
18992 o Updated the man page to reflect the new features.
18995 Changes in version 0.0.7rc2 - 2004-06-06
18996 o Changes from 0.0.7rc1:
18997 - Make it build on Win32 again.
18998 o Changes from 0.0.6.2:
18999 - Rotate dnsworkers and cpuworkers on SIGHUP, so they get new config
19003 Changes in version 0.0.7rc1 - 2004-06-02
19005 - On sighup, we were adding another log without removing the first
19006 one. So log messages would get duplicated n times for n sighups.
19007 - Several cases of using a connection after we'd freed it. The
19008 problem was that connections that are pending resolve are in both
19009 the pending_resolve tree, and also the circuit's resolving_streams
19010 list. When you want to remove one, you must remove it from both.
19011 - Fix a double-mark-for-close where an end cell arrived for a
19012 resolving stream, and then the resolve failed.
19013 - Check directory signatures based on name of signer, not on whom
19014 we got the directory from. This will let us cache directories more
19017 - Crank up some of our constants to handle more users.
19020 Changes in version 0.0.7pre1 - 2004-06-02
19021 o Fixes for crashes and other obnoxious bugs:
19022 - Fix an epipe bug: sometimes when directory connections failed
19023 to connect, we would give them a chance to flush before closing
19025 - When we detached from a circuit because of resolvefailed, we
19026 would immediately try the same circuit twice more, and then
19027 give up on the resolve thinking we'd tried three different
19029 - Limit the number of intro circuits we'll attempt to build for a
19030 hidden service per 15-minute period.
19031 - Check recommended-software string *early*, before actually parsing
19032 the directory. Thus we can detect an obsolete version and exit,
19033 even if the new directory format doesn't parse.
19034 o Fixes for security bugs:
19035 - Remember which nodes are dirservers when you startup, and if a
19036 random OR enables his dirport, don't automatically assume he's
19037 a trusted dirserver.
19039 - Directory connections were asking the wrong poll socket to
19040 start writing, and not asking themselves to start writing.
19041 - When we detached from a circuit because we sent a begin but
19042 didn't get a connected, we would use it again the first time;
19043 but after that we would correctly switch to a different one.
19044 - Stop warning when the first onion decrypt attempt fails; they
19045 will sometimes legitimately fail now that we rotate keys.
19046 - Override unaligned-access-ok check when $host_cpu is ia64 or
19047 arm. Apparently they allow it but the kernel whines.
19048 - Dirservers try to reconnect periodically too, in case connections
19050 - Fix some memory leaks in directory servers.
19051 - Allow backslash in Win32 filenames.
19052 - Made Tor build complain-free on FreeBSD, hopefully without
19053 breaking other BSD builds. We'll see.
19055 - Doxygen markup on all functions and global variables.
19056 - Make directory functions update routerlist, not replace it. So
19057 now directory disagreements are not so critical a problem.
19058 - Remove the upper limit on number of descriptors in a dirserver's
19059 directory (not that we were anywhere close).
19060 - Allow multiple logfiles at different severity ranges.
19061 - Allow *BindAddress to specify ":port" rather than setting *Port
19062 separately. Allow multiple instances of each BindAddress config
19063 option, so you can bind to multiple interfaces if you want.
19064 - Allow multiple exit policy lines, which are processed in order.
19065 Now we don't need that huge line with all the commas in it.
19066 - Enable accept/reject policies on SOCKS connections, so you can bind
19067 to 0.0.0.0 but still control who can use your OP.
19070 Changes in version 0.0.6.2 - 2004-05-16
19071 o Our integrity-checking digest was checking only the most recent cell,
19072 not the previous cells like we'd thought.
19073 Thanks to Stefan Mark for finding the flaw!
19076 Changes in version 0.0.6.1 - 2004-05-06
19077 o Fix two bugs in our AES counter-mode implementation (this affected
19078 onion-level stream encryption, but not TLS-level). It turns
19079 out we were doing something much more akin to a 16-character
19080 polyalphabetic cipher. Oops.
19081 Thanks to Stefan Mark for finding the flaw!
19082 o Retire moria3 as a directory server, and add tor26 as a directory
19086 Changes in version 0.0.6 - 2004-05-02
19087 [version bump only]
19090 Changes in version 0.0.6rc4 - 2004-05-01
19091 o Update the built-in dirservers list to use the new directory format
19092 o Fix a rare seg fault: if a node offering a hidden service attempts
19093 to build a circuit to Alice's rendezvous point and fails before it
19094 reaches the last hop, it retries with a different circuit, but
19096 o Handle windows socket errors correctly.
19099 Changes in version 0.0.6rc3 - 2004-04-28
19100 o Don't expire non-general excess circuits (if we had enough
19101 circuits open, we were expiring rendezvous circuits -- even
19102 when they had a stream attached. oops.)
19103 o Fetch randomness from /dev/urandom better (not via fopen/fread)
19104 o Better debugging for tls errors
19105 o Some versions of openssl have an SSL_pending function that erroneously
19106 returns bytes when there is a non-application record pending.
19107 o Set Content-Type on the directory and hidserv descriptor.
19108 o Remove IVs from cipher code, since AES-ctr has none.
19109 o Win32 fixes. Tor now compiles on win32 with no warnings/errors.
19110 o We were using an array of length zero in a few places.
19111 o win32's gethostbyname can't resolve an IP to an IP.
19112 o win32's close can't close a socket.
19115 Changes in version 0.0.6rc2 - 2004-04-26
19116 o Fix a bug where we were closing tls connections intermittently.
19117 It turns out openssl keeps its errors around -- so if an error
19118 happens, and you don't ask about it, and then another openssl
19119 operation happens and succeeds, and you ask if there was an error,
19120 it tells you about the first error. Fun fun.
19121 o Fix a bug that's been lurking since 27 may 03 (!)
19122 When passing back a destroy cell, we would use the wrong circ id.
19123 'Mostly harmless', but still worth fixing.
19124 o Since we don't support truncateds much, don't bother sending them;
19125 just close the circ.
19126 o check for <machine/limits.h> so we build on NetBSD again (I hope).
19127 o don't crash if a conn that sent a begin has suddenly lost its circuit
19128 (this was quite rare).
19131 Changes in version 0.0.6rc1 - 2004-04-25
19132 o We now rotate link (tls context) keys and onion keys.
19133 o CREATE cells now include oaep padding, so you can tell
19134 if you decrypted them correctly.
19135 o Add bandwidthburst to server descriptor.
19136 o Directories now say which dirserver signed them.
19137 o Use a tor_assert macro that logs failed assertions too.
19140 Changes in version 0.0.6pre5 - 2004-04-18
19141 o changes from 0.0.6pre4:
19142 - make tor build on broken freebsd 5.2 installs
19143 - fix a failed assert when you try an intro point, get a nack, and try
19144 a second one and it works.
19145 - when alice uses a port that the hidden service doesn't accept,
19146 it now sends back an end cell (denied by exit policy). otherwise
19147 alice would just have to wait to time out.
19148 - fix another rare bug: when we had tried all the intro
19149 points for a hidden service, we fetched the descriptor
19150 again, but we left our introcirc thinking it had already
19151 sent an intro, so it kept waiting for a response...
19152 - bugfix: when you sleep your hidden-service laptop, as soon
19153 as it wakes up it tries to upload a service descriptor, but
19154 socketpair fails for some reason (localhost not up yet?).
19155 now we simply give up on that upload, and we'll try again later.
19156 i'd still like to find the bug though.
19157 - if an intro circ waiting for an ack dies before getting one, then
19159 - we were reusing stale service descriptors and refetching usable
19163 Changes in version 0.0.6pre4 - 2004-04-14
19164 o changes from 0.0.6pre3:
19165 - when bob fails to connect to the rendezvous point, and his
19166 circ didn't fail because of the rendezvous point itself, then
19167 he retries a couple of times
19168 - we expire introduction and rendezvous circs more thoroughly
19169 (sometimes they were hanging around forever)
19170 - we expire unattached rendezvous streams that have been around
19171 too long (they were sticking around forever).
19172 - fix a measly fencepost error that was crashing everybody with
19176 Changes in version 0.0.6pre3 - 2004-04-14
19177 o changes from 0.0.6pre2:
19178 - make hup work again
19179 - fix some memory leaks for dirservers
19180 - allow more skew in rendezvous descriptor timestamps, to help
19181 handle people like blanu who don't know what time it is
19182 - normal circs are 3 hops, but some rend/intro circs are 4, if
19183 the initiator doesn't get to choose the last hop
19184 - send acks for introductions, so alice can know whether to try
19186 - bob publishes intro points more correctly
19187 o changes from 0.0.5:
19188 - fix an assert trigger that's been plaguing us since the days
19189 of 0.0.2prexx (thanks weasel!)
19190 - retry stream correctly when we fail to connect because of
19191 exit-policy-reject (should try another) or can't-resolve-address
19192 (also should try another, because dns on random internet servers
19194 - when we hup a dirserver and we've *removed* a server from the
19195 approved-routers list, now we remove that server from the
19196 in-memory directories too
19199 Changes in version 0.0.6pre2 - 2004-04-08
19200 o We fixed our base32 implementation. Now it works on all architectures.
19203 Changes in version 0.0.6pre1 - 2004-04-08
19205 - Hidden services and rendezvous points are implemented. Go to
19206 http://6sxoyfb3h2nvok2d.onion/ for an index of currently available
19207 hidden services. (This only works via a socks4a proxy such as
19208 Privoxy, and currently it's quite slow.)
19211 Changes in version 0.0.5 - 2004-03-30
19212 [version bump only]
19215 Changes in version 0.0.5rc3 - 2004-03-29
19216 o Install torrc as torrc.sample -- we no longer clobber your
19218 o Re-enable recommendedversion checking (we broke it in rc2, oops)
19219 o Add in a 'notice' log level for things the operator should hear
19220 but that aren't warnings
19223 Changes in version 0.0.5rc2 - 2004-03-29
19224 o Hold socks connection open until reply is flushed (if possible)
19225 o Make exit nodes resolve IPs to IPs immediately, rather than asking
19226 the dns farm to do it.
19227 o Fix c99 aliasing warnings in rephist.c
19228 o Don't include server descriptors that are older than 24 hours in the
19230 o Give socks 'reject' replies their whole 15s to attempt to flush,
19231 rather than seeing the 60s timeout and assuming the flush had failed.
19232 o Clean automake droppings from the cvs repository
19235 Changes in version 0.0.5rc1 - 2004-03-28
19236 o Fix mangled-state bug in directory fetching (was causing sigpipes).
19237 o Only build circuits after we've fetched the directory: clients were
19238 using only the directory servers before they'd fetched a directory.
19239 This also means longer startup time; so it goes.
19240 o Fix an assert trigger where an OP would fail to handshake, and we'd
19241 expect it to have a nickname.
19242 o Work around a tsocks bug: do a socks reject when AP connection dies
19243 early, else tsocks goes into an infinite loop.
19246 Changes in version 0.0.4 - 2004-03-26
19247 o When connecting to a dirserver or OR and the network is down,
19251 Changes in version 0.0.3 - 2004-03-26
19252 o Warn and fail if server chose a nickname with illegal characters
19253 o Port to Solaris and Sparc:
19254 - include missing header fcntl.h
19255 - have autoconf find -lsocket -lnsl automatically
19256 - deal with hardware word alignment
19257 - make uname() work (solaris has a different return convention)
19258 - switch from using signal() to sigaction()
19259 o Preliminary work on reputation system:
19260 - Keep statistics on success/fail of connect attempts; they're published
19261 by kill -USR1 currently.
19262 - Add a RunTesting option to try to learn link state by creating test
19263 circuits, even when SocksPort is off.
19264 - Remove unused open circuits when there are too many.
19267 Changes in version 0.0.2 - 2004-03-19
19268 - Include strlcpy and strlcat for safer string ops
19269 - define INADDR_NONE so we compile (but still not run) on solaris
19272 Changes in version 0.0.2pre27 - 2004-03-14
19274 - Allow internal tor networks (we were rejecting internal IPs,
19275 now we allow them if they're set explicitly).
19276 - And fix a few endian issues.
19279 Changes in version 0.0.2pre26 - 2004-03-14
19281 - If a stream times out after 15s without a connected cell, don't
19282 try that circuit again: try a new one.
19283 - Retry streams at most 4 times. Then give up.
19284 - When a dirserver gets a descriptor from an unknown router, it
19285 logs its fingerprint (so the dirserver operator can choose to
19286 accept it even without mail from the server operator).
19287 - Inform unapproved servers when we reject their descriptors.
19288 - Make tor build on Windows again. It works as a client, who knows
19290 - Clearer instructions in the torrc for how to set up a server.
19291 - Be more efficient about reading fd's when our global token bucket
19292 (used for rate limiting) becomes empty.
19294 - Stop asserting that computers always go forward in time. It's
19296 - When we sent a cell (e.g. destroy) and then marked an OR connection
19297 expired, we might close it before finishing a flush if the other
19298 side isn't reading right then.
19299 - Don't allow dirservers to start if they haven't defined
19300 RecommendedVersions
19301 - We were caching transient dns failures. Oops.
19302 - Prevent servers from publishing an internal IP as their address.
19303 - Address a strcat vulnerability in circuit.c
19306 Changes in version 0.0.2pre25 - 2004-03-04
19308 - Put the OR's IP in its router descriptor, not its fqdn. That way
19309 we'll stop being stalled by gethostbyname for nodes with flaky dns,
19312 - If the user typed in an address that didn't resolve, the server
19316 Changes in version 0.0.2pre24 - 2004-03-03
19318 - Fix an assertion failure in dns.c, where we were trying to dequeue
19319 a pending dns resolve even if it wasn't pending
19320 - Fix a spurious socks5 warning about still trying to write after the
19321 connection is finished.
19322 - Hold certain marked_for_close connections open until they're finished
19323 flushing, rather than losing bytes by closing them too early.
19324 - Correctly report the reason for ending a stream
19325 - Remove some duplicate calls to connection_mark_for_close
19326 - Put switch_id and start_daemon earlier in the boot sequence, so it
19327 will actually try to chdir() to options.DataDirectory
19328 - Make 'make test' exit(1) if a test fails; fix some unit tests
19329 - Make tor fail when you use a config option it doesn't know about,
19330 rather than warn and continue.
19331 - Make --version work
19332 - Bugfixes on the rpm spec file and tor.sh, so it's more up to date
19335 Changes in version 0.0.2pre23 - 2004-02-29
19337 - Print a statement when the first circ is finished, so the user
19338 knows it's working.
19339 - If a relay cell is unrecognized at the end of the circuit,
19340 send back a destroy. (So attacks to mutate cells are more
19342 - New config option 'excludenodes' to avoid certain nodes for circuits.
19343 - When it daemonizes, it chdir's to the DataDirectory rather than "/",
19344 so you can collect coredumps there.
19346 - Fix a bug in tls flushing where sometimes data got wedged and
19347 didn't flush until more data got sent. Hopefully this bug was
19348 a big factor in the random delays we were seeing.
19349 - Make 'connected' cells include the resolved IP, so the client
19350 dns cache actually gets populated.
19351 - Disallow changing from ORPort=0 to ORPort>0 on hup.
19352 - When we time-out on a stream and detach from the circuit, send an
19353 end cell down it first.
19354 - Only warn about an unknown router (in exitnodes, entrynodes,
19355 excludenodes) after we've fetched a directory.
19358 Changes in version 0.0.2pre22 - 2004-02-26
19360 - Servers publish less revealing uname information in descriptors.
19361 - More memory tracking and assertions, to crash more usefully when
19363 - If the default torrc isn't there, just use some default defaults.
19364 Plus provide an internal dirservers file if they don't have one.
19365 - When the user tries to use Tor as an http proxy, give them an http
19366 501 failure explaining that we're a socks proxy.
19367 - Dump a new router.desc on hup, to help confused people who change
19368 their exit policies and then wonder why router.desc doesn't reflect
19370 - Clean up the generic tor.sh init script that we ship with.
19372 - If the exit stream is pending on the resolve, and a destroy arrives,
19373 then the stream wasn't getting removed from the pending list. I
19374 think this was the one causing recent server crashes.
19375 - Use a more robust poll on OSX 10.3, since their poll is flaky.
19376 - When it couldn't resolve any dirservers, it was useless from then on.
19377 Now it reloads the RouterFile (or default dirservers) if it has no
19379 - Move the 'tor' binary back to /usr/local/bin/ -- it turns out
19380 many users don't even *have* a /usr/local/sbin/.
19383 Changes in version 0.0.2pre21 - 2004-02-18
19385 - There's a ChangeLog file that actually reflects the changelog.
19386 - There's a 'torify' wrapper script, with an accompanying
19387 tor-tsocks.conf, that simplifies the process of using tsocks for
19388 tor. It even has a man page.
19389 - The tor binary gets installed to sbin rather than bin now.
19390 - Retry streams where the connected cell hasn't arrived in 15 seconds
19391 - Clean up exit policy handling -- get the default out of the torrc,
19392 so we can update it without forcing each server operator to fix
19394 - Allow imaps and pop3s in default exit policy
19396 - Prevent picking middleman nodes as the last node in the circuit
19399 Changes in version 0.0.2pre20 - 2004-01-30
19401 - We now have a deb package, and it's in debian unstable. Go to
19402 it, apt-getters. :)
19403 - I've split the TotalBandwidth option into BandwidthRate (how many
19404 bytes per second you want to allow, long-term) and
19405 BandwidthBurst (how many bytes you will allow at once before the cap
19406 kicks in). This better token bucket approach lets you, say, set
19407 BandwidthRate to 10KB/s and BandwidthBurst to 10MB, allowing good
19408 performance while not exceeding your monthly bandwidth quota.
19409 - Push out a tls record's worth of data once you've got it, rather
19410 than waiting until you've read everything waiting to be read. This
19411 may improve performance by pipelining better. We'll see.
19412 - Add an AP_CONN_STATE_CONNECTING state, to allow streams to detach
19413 from failed circuits (if they haven't been connected yet) and attach
19415 - Expire old streams that haven't managed to connect. Some day we'll
19416 have them reattach to new circuits instead.
19419 - Fix several memory leaks that were causing servers to become bloated
19421 - Fix a few very rare assert triggers. A few more remain.
19422 - Setuid to User _before_ complaining about running as root.
19425 Changes in version 0.0.2pre19 - 2004-01-07
19427 - Fix deadlock condition in dns farm. We were telling a child to die by
19428 closing the parent's file descriptor to him. But newer children were
19429 inheriting the open file descriptor from the parent, and since they
19430 weren't closing it, the socket never closed, so the child never read
19431 eof, so he never knew to exit. Similarly, dns workers were holding
19432 open other sockets, leading to all sorts of chaos.
19433 - New cleaner daemon() code for forking and backgrounding.
19434 - If you log to a file, it now prints an entry at the top of the
19435 logfile so you know it's working.
19436 - The onionskin challenge length was 30 bytes longer than necessary.
19437 - Started to patch up the spec so it's not quite so out of date.
19440 Changes in version 0.0.2pre18 - 2004-01-02
19442 - Fix endian issues with the 'integrity' field in the relay header.
19443 - Fix a potential bug where connections in state
19444 AP_CONN_STATE_CIRCUIT_WAIT might unexpectedly ask to write.
19447 Changes in version 0.0.2pre17 - 2003-12-30
19449 - Made --debuglogfile (or any second log file, actually) work.
19450 - Resolved an edge case in get_unique_circ_id_by_conn where a smart
19451 adversary could force us into an infinite loop.
19454 - Each onionskin handshake now includes a hash of the computed key,
19455 to prove the server's identity and help perfect forward secrecy.
19456 - Changed cell size from 256 to 512 bytes (working toward compatibility
19458 - Changed cell length to 2 bytes, and moved it to the relay header.
19459 - Implemented end-to-end integrity checking for the payloads of
19461 - Separated streamid from 'recognized' (otherwise circuits will get
19462 messed up when we try to have streams exit from the middle). We
19463 use the integrity-checking to confirm that a cell is addressed to
19465 - Randomize the initial circid and streamid values, so an adversary who
19466 breaks into a node can't learn how many circuits or streams have
19470 Changes in version 0.0.2pre16 - 2003-12-14
19472 - Fixed a bug that made HUP trigger an assert
19473 - Fixed a bug where a circuit that immediately failed wasn't being
19474 counted as a failed circuit in counting retries.
19477 - Now we close the circuit when we get a truncated cell: otherwise we're
19478 open to an anonymity attack where a bad node in the path truncates
19479 the circuit and then we open streams at him.
19480 - Add port ranges to exit policies
19481 - Add a conservative default exit policy
19482 - Warn if you're running tor as root
19483 - on HUP, retry OR connections and close/rebind listeners
19484 - options.EntryNodes: try these nodes first when picking the first node
19485 - options.ExitNodes: if your best choices happen to include any of
19486 your preferred exit nodes, you choose among just those preferred
19488 - options.ExcludedNodes: nodes that are never picked in path building
19491 Changes in version 0.0.2pre15 - 2003-12-03
19492 o Robustness and bugfixes:
19493 - Sometimes clients would cache incorrect DNS resolves, which would
19494 really screw things up.
19495 - An OP that goes offline would slowly leak all its sockets and stop
19497 - A wide variety of bugfixes in exit node selection, exit policy
19498 handling, and processing pending streams when a new circuit is
19500 - Pick nodes for a path only from those the directory says are up
19501 - Choose randomly from all running dirservers, not always the first one
19502 - Increase allowed http header size for directory fetch.
19503 - Stop writing to stderr (if we're daemonized it will be closed).
19504 - Enable -g always, so cores will be more useful to me.
19505 - Switch "-lcrypto -lssl" to "-lssl -lcrypto" for broken distributions.
19508 - Wrote a man page. It lists commonly used options.
19511 - Change default loglevel to warn.
19512 - Make PidFile default to null rather than littering in your CWD.
19513 - OnionRouter config option is now obsolete. Instead it just checks
19515 - Moved to a single unified torrc file for both clients and servers.
19518 Changes in version 0.0.2pre14 - 2003-11-29
19519 o Robustness and bugfixes:
19520 - Force the admin to make the DataDirectory himself
19521 - to get ownership/permissions right
19522 - so clients no longer make a DataDirectory and then never use it
19523 - fix bug where a client who was offline for 45 minutes would never
19524 pull down a directory again
19525 - fix (or at least hide really well) the dns assert bug that was
19526 causing server crashes
19527 - warnings and improved robustness wrt clockskew for certs
19528 - use the native daemon(3) to daemonize, when available
19529 - exit if bind() fails
19530 - exit if neither socksport nor orport is defined
19531 - include our own tor_timegm (Win32 doesn't have its own)
19532 - bugfix for win32 with lots of connections
19533 - fix minor bias in PRNG
19534 - make dirserver more robust to corrupt cached directory
19537 - Wrote the design document (woo)
19539 o Circuit building and exit policies:
19540 - Circuits no longer try to use nodes that the directory has told them
19542 - Exit policies now support bitmasks (18.0.0.0/255.0.0.0) and
19543 bitcounts (18.0.0.0/8).
19544 - Make AP connections standby for a circuit if no suitable circuit
19545 exists, rather than failing
19546 - Circuits choose exit node based on addr/port, exit policies, and
19547 which AP connections are standing by
19548 - Bump min pathlen from 2 to 3
19549 - Relay end cells have a payload to describe why the stream ended.
19550 - If the stream failed because of exit policy, try again with a new
19552 - Clients have a dns cache to remember resolved addresses.
19553 - Notice more quickly when we have no working circuits
19556 - APPort is now called SocksPort
19557 - SocksBindAddress, ORBindAddress, DirBindAddress let you configure
19559 - RecommendedVersions is now a config variable rather than
19560 hardcoded (for dirservers)
19561 - Reloads config on HUP
19562 - Usage info on -h or --help
19563 - If you set User and Group config vars, it'll setu/gid to them.
19566 Changes in version 0.0.2pre13 - 2003-10-19
19567 o General stability:
19568 - SSL_write no longer fails when it returns WANTWRITE and the number
19569 of bytes in the buf has changed by the next SSL_write call.
19570 - Fix segfault fetching directory when network is down
19571 - Fix a variety of minor memory leaks
19572 - Dirservers reload the fingerprints file on HUP, so I don't have
19573 to take down the network when I approve a new router
19574 - Default server config file has explicit Address line to specify fqdn
19577 - Buffers grow and shrink as needed (Cut process size from 20M to 2M)
19578 - Make listener connections not ever alloc bufs
19580 o Autoconf improvements:
19581 - don't clobber an external CFLAGS in ./configure
19582 - Make install now works
19583 - create var/lib/tor on make install
19584 - autocreate a tor.sh initscript to help distribs
19585 - autocreate the torrc and sample-server-torrc with correct paths
19587 o Log files and Daemonizing now work:
19588 - If --DebugLogFile is specified, log to it at -l debug
19589 - If --LogFile is specified, use it instead of commandline
19590 - If --RunAsDaemon is set, tor forks and backgrounds on startup