1 /* $OpenBSD: ssl_sess.c,v 1.81 2018/08/24 18:10:25 jsing Exp $ */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to. The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
26 * 1. Redistributions of source code must retain the copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 * must display the following acknowledgement:
33 * "This product includes cryptographic software written by
34 * Eric Young (eay@cryptsoft.com)"
35 * The word 'cryptographic' can be left out if the rouines from the library
36 * being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
58 /* ====================================================================
59 * Copyright (c) 1998-2006 The OpenSSL Project. All rights reserved.
61 * Redistribution and use in source and binary forms, with or without
62 * modification, are permitted provided that the following conditions
65 * 1. Redistributions of source code must retain the above copyright
66 * notice, this list of conditions and the following disclaimer.
68 * 2. Redistributions in binary form must reproduce the above copyright
69 * notice, this list of conditions and the following disclaimer in
70 * the documentation and/or other materials provided with the
73 * 3. All advertising materials mentioning features or use of this
74 * software must display the following acknowledgment:
75 * "This product includes software developed by the OpenSSL Project
76 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
78 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
79 * endorse or promote products derived from this software without
80 * prior written permission. For written permission, please contact
81 * openssl-core@openssl.org.
83 * 5. Products derived from this software may not be called "OpenSSL"
84 * nor may "OpenSSL" appear in their names without prior written
85 * permission of the OpenSSL Project.
87 * 6. Redistributions of any form whatsoever must retain the following
89 * "This product includes software developed by the OpenSSL Project
90 * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
92 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
93 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
94 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
95 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
96 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
97 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
98 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
99 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
100 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
101 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
102 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
103 * OF THE POSSIBILITY OF SUCH DAMAGE.
104 * ====================================================================
106 * This product includes cryptographic software written by Eric Young
107 * (eay@cryptsoft.com). This product includes software written by Tim
108 * Hudson (tjh@cryptsoft.com).
111 /* ====================================================================
112 * Copyright 2005 Nokia. All rights reserved.
114 * The portions of the attached software ("Contribution") is developed by
115 * Nokia Corporation and is licensed pursuant to the OpenSSL open source
118 * The Contribution, originally written by Mika Kousa and Pasi Eronen of
119 * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
120 * support (see RFC 4279) to OpenSSL.
122 * No patent licenses or other rights except those expressly stated in
123 * the OpenSSL open source license shall be deemed granted or received
124 * expressly, by implication, estoppel, or otherwise.
126 * No assurances are provided by Nokia that the Contribution does not
127 * infringe the patent or other intellectual property rights of any third
128 * party or that the license provides you with all the necessary rights
129 * to make use of the Contribution.
131 * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
132 * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
133 * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
134 * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
138 #include <openssl/lhash.h>
140 #ifndef OPENSSL_NO_ENGINE
141 #include <openssl/engine.h>
144 #include "ssl_locl.h"
146 static void SSL_SESSION_list_remove(SSL_CTX
*ctx
, SSL_SESSION
*s
);
147 static void SSL_SESSION_list_add(SSL_CTX
*ctx
, SSL_SESSION
*s
);
148 static int remove_session_lock(SSL_CTX
*ctx
, SSL_SESSION
*c
, int lck
);
150 /* aka SSL_get0_session; gets 0 objects, just returns a copy of the pointer */
152 SSL_get_session(const SSL
*ssl
)
154 return (ssl
->session
);
157 /* variant of SSL_get_session: caller really gets something */
159 SSL_get1_session(SSL
*ssl
)
164 * Need to lock this all up rather than just use CRYPTO_add so that
165 * somebody doesn't free ssl->session between when we check it's
166 * non-null and when we up the reference count.
168 CRYPTO_w_lock(CRYPTO_LOCK_SSL_SESSION
);
172 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_SESSION
);
178 SSL_SESSION_get_ex_new_index(long argl
, void *argp
, CRYPTO_EX_new
*new_func
,
179 CRYPTO_EX_dup
*dup_func
, CRYPTO_EX_free
*free_func
)
181 return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL_SESSION
,
182 argl
, argp
, new_func
, dup_func
, free_func
);
186 SSL_SESSION_set_ex_data(SSL_SESSION
*s
, int idx
, void *arg
)
188 return (CRYPTO_set_ex_data(&s
->internal
->ex_data
, idx
, arg
));
192 SSL_SESSION_get_ex_data(const SSL_SESSION
*s
, int idx
)
194 return (CRYPTO_get_ex_data(&s
->internal
->ex_data
, idx
));
198 SSL_SESSION_new(void)
202 if (!OPENSSL_init_ssl(0, NULL
)) {
203 SSLerrorx(SSL_R_LIBRARY_BUG
);
207 if ((ss
= calloc(1, sizeof(*ss
))) == NULL
) {
208 SSLerrorx(ERR_R_MALLOC_FAILURE
);
211 if ((ss
->internal
= calloc(1, sizeof(*ss
->internal
))) == NULL
) {
213 SSLerrorx(ERR_R_MALLOC_FAILURE
);
217 ss
->verify_result
= 1; /* avoid 0 (= X509_V_OK) just in case */
219 ss
->timeout
=60*5+4; /* 5 minute timeout by default */
220 ss
->time
= time(NULL
);
221 ss
->internal
->prev
= NULL
;
222 ss
->internal
->next
= NULL
;
223 ss
->tlsext_hostname
= NULL
;
225 ss
->internal
->tlsext_ecpointformatlist_length
= 0;
226 ss
->internal
->tlsext_ecpointformatlist
= NULL
;
227 ss
->internal
->tlsext_supportedgroups_length
= 0;
228 ss
->internal
->tlsext_supportedgroups
= NULL
;
230 CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_SESSION
, ss
, &ss
->internal
->ex_data
);
235 const unsigned char *
236 SSL_SESSION_get_id(const SSL_SESSION
*ss
, unsigned int *len
)
239 *len
= ss
->session_id_length
;
240 return ss
->session_id
;
243 const unsigned char *
244 SSL_SESSION_get0_id_context(const SSL_SESSION
*ss
, unsigned int *len
)
247 *len
= (unsigned int)ss
->sid_ctx_length
;
252 SSL_SESSION_get_compress_id(const SSL_SESSION
*ss
)
258 SSL_SESSION_get_ticket_lifetime_hint(const SSL_SESSION
*s
)
260 return s
->tlsext_tick_lifetime_hint
;
264 SSL_SESSION_has_ticket(const SSL_SESSION
*s
)
266 return (s
->tlsext_ticklen
> 0) ? 1 : 0;
270 * SSLv3/TLSv1 has 32 bytes (256 bits) of session ID space. As such, filling
271 * the ID with random gunk repeatedly until we have no conflict is going to
272 * complete in one iteration pretty much "most" of the time (btw:
273 * understatement). So, if it takes us 10 iterations and we still can't avoid
274 * a conflict - well that's a reasonable point to call it quits. Either the
275 * arc4random code is broken or someone is trying to open roughly very close to
276 * 2^128 (or 2^256) SSL sessions to our server. How you might store that many
277 * sessions is perhaps a more interesting question...
280 #define MAX_SESS_ID_ATTEMPTS 10
283 def_generate_session_id(const SSL
*ssl
, unsigned char *id
, unsigned int *id_len
)
285 unsigned int retry
= 0;
288 arc4random_buf(id
, *id_len
);
289 } while (SSL_has_matching_session_id(ssl
, id
, *id_len
) &&
290 (++retry
< MAX_SESS_ID_ATTEMPTS
));
292 if (retry
< MAX_SESS_ID_ATTEMPTS
)
295 /* else - woops a session_id match */
296 /* XXX We should also check the external cache --
297 * but the probability of a collision is negligible, and
298 * we could not prevent the concurrent creation of sessions
299 * with identical IDs since we currently don't have means
300 * to atomically check whether a session ID already exists
301 * and make a reservation for it if it does not
302 * (this problem applies to the internal cache as well).
308 ssl_get_new_session(SSL
*s
, int session
)
311 SSL_SESSION
*ss
= NULL
;
312 GEN_SESSION_CB cb
= def_generate_session_id
;
314 /* This gets used by clients and servers. */
316 if ((ss
= SSL_SESSION_new()) == NULL
)
319 /* If the context has a default timeout, use it */
320 if (s
->session_ctx
->session_timeout
== 0)
321 ss
->timeout
= SSL_get_default_timeout(s
);
323 ss
->timeout
= s
->session_ctx
->session_timeout
;
325 if (s
->session
!= NULL
) {
326 SSL_SESSION_free(s
->session
);
331 switch (s
->version
) {
336 ss
->ssl_version
= s
->version
;
337 ss
->session_id_length
= SSL3_SSL_SESSION_ID_LENGTH
;
340 SSLerror(s
, SSL_R_UNSUPPORTED_SSL_VERSION
);
341 SSL_SESSION_free(ss
);
345 /* If RFC4507 ticket use empty session ID. */
346 if (s
->internal
->tlsext_ticket_expected
) {
347 ss
->session_id_length
= 0;
351 /* Choose which callback will set the session ID. */
352 CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX
);
353 if (s
->internal
->generate_session_id
)
354 cb
= s
->internal
->generate_session_id
;
355 else if (s
->session_ctx
->internal
->generate_session_id
)
356 cb
= s
->session_ctx
->internal
->generate_session_id
;
357 CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX
);
359 /* Choose a session ID. */
360 tmp
= ss
->session_id_length
;
361 if (!cb(s
, ss
->session_id
, &tmp
)) {
362 /* The callback failed */
363 SSLerror(s
, SSL_R_SSL_SESSION_ID_CALLBACK_FAILED
);
364 SSL_SESSION_free(ss
);
369 * Don't allow the callback to set the session length to zero.
370 * nor set it higher than it was.
372 if (!tmp
|| (tmp
> ss
->session_id_length
)) {
373 /* The callback set an illegal length */
374 SSLerror(s
, SSL_R_SSL_SESSION_ID_HAS_BAD_LENGTH
);
375 SSL_SESSION_free(ss
);
378 ss
->session_id_length
= tmp
;
380 /* Finally, check for a conflict. */
381 if (SSL_has_matching_session_id(s
, ss
->session_id
,
382 ss
->session_id_length
)) {
383 SSLerror(s
, SSL_R_SSL_SESSION_ID_CONFLICT
);
384 SSL_SESSION_free(ss
);
389 if (s
->tlsext_hostname
) {
390 ss
->tlsext_hostname
= strdup(s
->tlsext_hostname
);
391 if (ss
->tlsext_hostname
== NULL
) {
392 SSLerror(s
, ERR_R_INTERNAL_ERROR
);
393 SSL_SESSION_free(ss
);
398 ss
->session_id_length
= 0;
401 if (s
->sid_ctx_length
> sizeof ss
->sid_ctx
) {
402 SSLerror(s
, ERR_R_INTERNAL_ERROR
);
403 SSL_SESSION_free(ss
);
407 memcpy(ss
->sid_ctx
, s
->sid_ctx
, s
->sid_ctx_length
);
408 ss
->sid_ctx_length
= s
->sid_ctx_length
;
410 ss
->ssl_version
= s
->version
;
411 ss
->verify_result
= X509_V_OK
;
417 * ssl_get_prev attempts to find an SSL_SESSION to be used to resume this
418 * connection. It is only called by servers.
420 * session_id: points at the session ID in the ClientHello. This code will
421 * read past the end of this in order to parse out the session ticket
423 * session_id_len: the length of the session ID.
424 * ext_block: a CBS for the ClientHello extensions block.
428 * 0: a session may have been found.
431 * - If a session is found then s->session is pointed at it (after freeing
432 * an existing session if need be) and s->verify_result is set from the
434 * - Both for new and resumed sessions, s->internal->tlsext_ticket_expected is set
435 * to 1 if the server should issue a new session ticket (to 0 otherwise).
438 ssl_get_prev_session(SSL
*s
, const unsigned char *session_id
,
439 int session_id_len
, CBS
*ext_block
)
441 SSL_SESSION
*ret
= NULL
;
443 int try_session_cache
= 1;
446 /* This is used only by servers. */
448 if (session_id_len
> SSL_MAX_SSL_SESSION_ID_LENGTH
)
451 if (session_id_len
== 0)
452 try_session_cache
= 0;
454 /* Sets s->internal->tlsext_ticket_expected. */
455 r
= tls1_process_ticket(s
, session_id
, session_id_len
, ext_block
, &ret
);
457 case -1: /* Error during processing */
460 case 0: /* No ticket found */
461 case 1: /* Zero length ticket found */
462 break; /* Ok to carry on processing session id. */
463 case 2: /* Ticket found but not decrypted. */
464 case 3: /* Ticket decrypted, *ret has been set. */
465 try_session_cache
= 0;
471 if (try_session_cache
&& ret
== NULL
&&
472 !(s
->session_ctx
->internal
->session_cache_mode
&
473 SSL_SESS_CACHE_NO_INTERNAL_LOOKUP
)) {
475 data
.ssl_version
= s
->version
;
476 data
.session_id_length
= session_id_len
;
477 memcpy(data
.session_id
, session_id
, session_id_len
);
479 CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX
);
480 ret
= lh_SSL_SESSION_retrieve(s
->session_ctx
->internal
->sessions
, &data
);
482 /* Don't allow other threads to steal it. */
483 CRYPTO_add(&ret
->references
, 1,
484 CRYPTO_LOCK_SSL_SESSION
);
486 CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX
);
489 s
->session_ctx
->internal
->stats
.sess_miss
++;
492 if (try_session_cache
&& ret
== NULL
&&
493 s
->session_ctx
->internal
->get_session_cb
!= NULL
) {
496 if ((ret
= s
->session_ctx
->internal
->get_session_cb(s
,
497 session_id
, session_id_len
, ©
))) {
498 s
->session_ctx
->internal
->stats
.sess_cb_hit
++;
501 * Increment reference count now if the session
502 * callback asks us to do so (note that if the session
503 * structures returned by the callback are shared
504 * between threads, it must handle the reference count
505 * itself [i.e. copy == 0], or things won't be
509 CRYPTO_add(&ret
->references
, 1,
510 CRYPTO_LOCK_SSL_SESSION
);
513 * Add the externally cached session to the internal
514 * cache as well if and only if we are supposed to.
516 if (!(s
->session_ctx
->internal
->session_cache_mode
&
517 SSL_SESS_CACHE_NO_INTERNAL_STORE
))
519 * The following should not return 1,
520 * otherwise, things are very strange.
522 SSL_CTX_add_session(s
->session_ctx
, ret
);
529 /* Now ret is non-NULL and we own one of its reference counts. */
531 if (ret
->sid_ctx_length
!= s
->sid_ctx_length
||
532 timingsafe_memcmp(ret
->sid_ctx
,
533 s
->sid_ctx
, ret
->sid_ctx_length
) != 0) {
534 /* We have the session requested by the client, but we don't
535 * want to use it in this context. */
536 goto err
; /* treat like cache miss */
539 if ((s
->verify_mode
& SSL_VERIFY_PEER
) && s
->sid_ctx_length
== 0) {
541 * We can't be sure if this session is being used out of
542 * context, which is especially important for SSL_VERIFY_PEER.
543 * The application should have used
544 * SSL[_CTX]_set_session_id_context.
546 * For this error case, we generate an error instead of treating
547 * the event like a cache miss (otherwise it would be easy for
548 * applications to effectively disable the session cache by
549 * accident without anyone noticing).
551 SSLerror(s
, SSL_R_SESSION_ID_CONTEXT_UNINITIALIZED
);
556 if (ret
->cipher
== NULL
) {
557 ret
->cipher
= ssl3_get_cipher_by_id(ret
->cipher_id
);
558 if (ret
->cipher
== NULL
)
562 if (ret
->timeout
< (time(NULL
) - ret
->time
)) {
564 s
->session_ctx
->internal
->stats
.sess_timeout
++;
565 if (try_session_cache
) {
566 /* session was from the cache, so remove it */
567 SSL_CTX_remove_session(s
->session_ctx
, ret
);
572 s
->session_ctx
->internal
->stats
.sess_hit
++;
574 if (s
->session
!= NULL
)
575 SSL_SESSION_free(s
->session
);
577 s
->verify_result
= s
->session
->verify_result
;
582 SSL_SESSION_free(ret
);
583 if (!try_session_cache
) {
585 * The session was from a ticket, so we should
586 * issue a ticket for the new session.
588 s
->internal
->tlsext_ticket_expected
= 1;
598 SSL_CTX_add_session(SSL_CTX
*ctx
, SSL_SESSION
*c
)
604 * Add just 1 reference count for the SSL_CTX's session cache
605 * even though it has two ways of access: each session is in a
606 * doubly linked list and an lhash.
608 CRYPTO_add(&c
->references
, 1, CRYPTO_LOCK_SSL_SESSION
);
611 * If session c is in already in cache, we take back the increment
614 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX
);
615 s
= lh_SSL_SESSION_insert(ctx
->internal
->sessions
, c
);
618 * s != NULL iff we already had a session with the given PID.
619 * In this case, s == c should hold (then we did not really modify
620 * ctx->internal->sessions), or we're in trouble.
622 if (s
!= NULL
&& s
!= c
) {
623 /* We *are* in trouble ... */
624 SSL_SESSION_list_remove(ctx
, s
);
627 * ... so pretend the other session did not exist in cache
628 * (we cannot handle two SSL_SESSION structures with identical
629 * session ID in the same cache, which could happen e.g. when
630 * two threads concurrently obtain the same session from an
636 /* Put at the head of the queue unless it is already in the cache */
638 SSL_SESSION_list_add(ctx
, c
);
642 * existing cache entry -- decrement previously incremented
643 * reference count because it already takes into account the
646 SSL_SESSION_free(s
); /* s == c */
650 * New cache entry -- remove old ones if cache has become
656 if (SSL_CTX_sess_get_cache_size(ctx
) > 0) {
657 while (SSL_CTX_sess_number(ctx
) >
658 SSL_CTX_sess_get_cache_size(ctx
)) {
659 if (!remove_session_lock(ctx
,
660 ctx
->internal
->session_cache_tail
, 0))
663 ctx
->internal
->stats
.sess_cache_full
++;
667 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX
);
672 SSL_CTX_remove_session(SSL_CTX
*ctx
, SSL_SESSION
*c
)
674 return remove_session_lock(ctx
, c
, 1);
678 remove_session_lock(SSL_CTX
*ctx
, SSL_SESSION
*c
, int lck
)
683 if ((c
!= NULL
) && (c
->session_id_length
!= 0)) {
685 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX
);
686 if ((r
= lh_SSL_SESSION_retrieve(ctx
->internal
->sessions
, c
)) == c
) {
688 r
= lh_SSL_SESSION_delete(ctx
->internal
->sessions
, c
);
689 SSL_SESSION_list_remove(ctx
, c
);
692 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX
);
695 r
->internal
->not_resumable
= 1;
696 if (ctx
->internal
->remove_session_cb
!= NULL
)
697 ctx
->internal
->remove_session_cb(ctx
, r
);
706 SSL_SESSION_free(SSL_SESSION
*ss
)
713 i
= CRYPTO_add(&ss
->references
, -1, CRYPTO_LOCK_SSL_SESSION
);
717 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_SESSION
, ss
, &ss
->internal
->ex_data
);
719 explicit_bzero(ss
->master_key
, sizeof ss
->master_key
);
720 explicit_bzero(ss
->session_id
, sizeof ss
->session_id
);
722 ssl_sess_cert_free(ss
->internal
->sess_cert
);
726 sk_SSL_CIPHER_free(ss
->ciphers
);
728 free(ss
->tlsext_hostname
);
729 free(ss
->tlsext_tick
);
730 free(ss
->internal
->tlsext_ecpointformatlist
);
731 free(ss
->internal
->tlsext_supportedgroups
);
733 freezero(ss
->internal
, sizeof(*ss
->internal
));
734 freezero(ss
, sizeof(*ss
));
738 SSL_SESSION_up_ref(SSL_SESSION
*ss
)
740 int refs
= CRYPTO_add(&ss
->references
, 1, CRYPTO_LOCK_SSL_SESSION
);
741 return (refs
> 1) ? 1 : 0;
745 SSL_set_session(SSL
*s
, SSL_SESSION
*session
)
748 const SSL_METHOD
*meth
;
750 if (session
!= NULL
) {
751 meth
= s
->ctx
->method
->internal
->get_ssl_method(session
->ssl_version
);
753 meth
= s
->method
->internal
->get_ssl_method(session
->ssl_version
);
755 SSLerror(s
, SSL_R_UNABLE_TO_FIND_SSL_METHOD
);
759 if (meth
!= s
->method
) {
760 if (!SSL_set_ssl_method(s
, meth
))
764 /* CRYPTO_w_lock(CRYPTO_LOCK_SSL);*/
765 CRYPTO_add(&session
->references
, 1, CRYPTO_LOCK_SSL_SESSION
);
766 if (s
->session
!= NULL
)
767 SSL_SESSION_free(s
->session
);
768 s
->session
= session
;
769 s
->verify_result
= s
->session
->verify_result
;
770 /* CRYPTO_w_unlock(CRYPTO_LOCK_SSL);*/
773 if (s
->session
!= NULL
) {
774 SSL_SESSION_free(s
->session
);
778 meth
= s
->ctx
->method
;
779 if (meth
!= s
->method
) {
780 if (!SSL_set_ssl_method(s
, meth
))
789 SSL_SESSION_get_master_key(const SSL_SESSION
*ss
, unsigned char *out
,
792 size_t len
= ss
->master_key_length
;
800 memcpy(out
, ss
->master_key
, len
);
806 SSL_SESSION_set_timeout(SSL_SESSION
*s
, long t
)
815 SSL_SESSION_get_timeout(const SSL_SESSION
*s
)
824 SSL_SESSION_get_time(const SSL_SESSION
*s
)
833 SSL_SESSION_set_time(SSL_SESSION
*s
, long t
)
842 SSL_SESSION_get_protocol_version(const SSL_SESSION
*s
)
844 return s
->ssl_version
;
848 SSL_SESSION_get0_peer(SSL_SESSION
*s
)
854 SSL_SESSION_set1_id(SSL_SESSION
*s
, const unsigned char *sid
,
855 unsigned int sid_len
)
857 if (sid_len
> SSL_MAX_SSL_SESSION_ID_LENGTH
) {
858 SSLerrorx(SSL_R_SSL_SESSION_ID_TOO_LONG
);
861 s
->session_id_length
= sid_len
;
862 memmove(s
->session_id
, sid
, sid_len
);
867 SSL_SESSION_set1_id_context(SSL_SESSION
*s
, const unsigned char *sid_ctx
,
868 unsigned int sid_ctx_len
)
870 if (sid_ctx_len
> SSL_MAX_SID_CTX_LENGTH
) {
871 SSLerrorx(SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG
);
874 s
->sid_ctx_length
= sid_ctx_len
;
875 memcpy(s
->sid_ctx
, sid_ctx
, sid_ctx_len
);
881 SSL_CTX_set_timeout(SSL_CTX
*s
, long t
)
887 l
= s
->session_timeout
;
888 s
->session_timeout
= t
;
894 SSL_CTX_get_timeout(const SSL_CTX
*s
)
898 return (s
->session_timeout
);
902 SSL_set_session_secret_cb(SSL
*s
, int (*tls_session_secret_cb
)(SSL
*s
,
903 void *secret
, int *secret_len
, STACK_OF(SSL_CIPHER
) *peer_ciphers
,
904 SSL_CIPHER
**cipher
, void *arg
), void *arg
)
908 s
->internal
->tls_session_secret_cb
= tls_session_secret_cb
;
909 s
->internal
->tls_session_secret_cb_arg
= arg
;
914 SSL_set_session_ticket_ext_cb(SSL
*s
, tls_session_ticket_ext_cb_fn cb
,
919 s
->internal
->tls_session_ticket_ext_cb
= cb
;
920 s
->internal
->tls_session_ticket_ext_cb_arg
= arg
;
925 SSL_set_session_ticket_ext(SSL
*s
, void *ext_data
, int ext_len
)
927 if (s
->version
>= TLS1_VERSION
) {
928 free(s
->internal
->tlsext_session_ticket
);
929 s
->internal
->tlsext_session_ticket
=
930 malloc(sizeof(TLS_SESSION_TICKET_EXT
) + ext_len
);
931 if (!s
->internal
->tlsext_session_ticket
) {
932 SSLerror(s
, ERR_R_MALLOC_FAILURE
);
937 s
->internal
->tlsext_session_ticket
->length
= ext_len
;
938 s
->internal
->tlsext_session_ticket
->data
=
939 s
->internal
->tlsext_session_ticket
+ 1;
940 memcpy(s
->internal
->tlsext_session_ticket
->data
,
943 s
->internal
->tlsext_session_ticket
->length
= 0;
944 s
->internal
->tlsext_session_ticket
->data
= NULL
;
953 typedef struct timeout_param_st
{
956 struct lhash_st_SSL_SESSION
*cache
;
960 timeout_doall_arg(SSL_SESSION
*s
, TIMEOUT_PARAM
*p
)
962 if ((p
->time
== 0) || (p
->time
> (s
->time
+ s
->timeout
))) {
964 /* The reason we don't call SSL_CTX_remove_session() is to
965 * save on locking overhead */
966 (void)lh_SSL_SESSION_delete(p
->cache
, s
);
967 SSL_SESSION_list_remove(p
->ctx
, s
);
968 s
->internal
->not_resumable
= 1;
969 if (p
->ctx
->internal
->remove_session_cb
!= NULL
)
970 p
->ctx
->internal
->remove_session_cb(p
->ctx
, s
);
976 timeout_LHASH_DOALL_ARG(void *arg1
, void *arg2
)
978 SSL_SESSION
*a
= arg1
;
979 TIMEOUT_PARAM
*b
= arg2
;
981 timeout_doall_arg(a
, b
);
986 SSL_CTX_flush_sessions(SSL_CTX
*s
, long t
)
992 tp
.cache
= s
->internal
->sessions
;
993 if (tp
.cache
== NULL
)
996 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX
);
997 i
= CHECKED_LHASH_OF(SSL_SESSION
, tp
.cache
)->down_load
;
998 CHECKED_LHASH_OF(SSL_SESSION
, tp
.cache
)->down_load
= 0;
999 lh_SSL_SESSION_doall_arg(tp
.cache
, timeout_LHASH_DOALL_ARG
,
1000 TIMEOUT_PARAM
, &tp
);
1001 CHECKED_LHASH_OF(SSL_SESSION
, tp
.cache
)->down_load
= i
;
1002 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX
);
1006 ssl_clear_bad_session(SSL
*s
)
1008 if ((s
->session
!= NULL
) && !(s
->internal
->shutdown
& SSL_SENT_SHUTDOWN
) &&
1009 !(SSL_in_init(s
) || SSL_in_before(s
))) {
1010 SSL_CTX_remove_session(s
->ctx
, s
->session
);
1016 /* locked by SSL_CTX in the calling function */
1018 SSL_SESSION_list_remove(SSL_CTX
*ctx
, SSL_SESSION
*s
)
1020 if ((s
->internal
->next
== NULL
) || (s
->internal
->prev
== NULL
))
1023 if (s
->internal
->next
== (SSL_SESSION
*)&(ctx
->internal
->session_cache_tail
)) {
1024 /* last element in list */
1025 if (s
->internal
->prev
== (SSL_SESSION
*)&(ctx
->internal
->session_cache_head
)) {
1026 /* only one element in list */
1027 ctx
->internal
->session_cache_head
= NULL
;
1028 ctx
->internal
->session_cache_tail
= NULL
;
1030 ctx
->internal
->session_cache_tail
= s
->internal
->prev
;
1031 s
->internal
->prev
->internal
->next
=
1032 (SSL_SESSION
*)&(ctx
->internal
->session_cache_tail
);
1035 if (s
->internal
->prev
== (SSL_SESSION
*)&(ctx
->internal
->session_cache_head
)) {
1036 /* first element in list */
1037 ctx
->internal
->session_cache_head
= s
->internal
->next
;
1038 s
->internal
->next
->internal
->prev
=
1039 (SSL_SESSION
*)&(ctx
->internal
->session_cache_head
);
1041 /* middle of list */
1042 s
->internal
->next
->internal
->prev
= s
->internal
->prev
;
1043 s
->internal
->prev
->internal
->next
= s
->internal
->next
;
1046 s
->internal
->prev
= s
->internal
->next
= NULL
;
1050 SSL_SESSION_list_add(SSL_CTX
*ctx
, SSL_SESSION
*s
)
1052 if ((s
->internal
->next
!= NULL
) && (s
->internal
->prev
!= NULL
))
1053 SSL_SESSION_list_remove(ctx
, s
);
1055 if (ctx
->internal
->session_cache_head
== NULL
) {
1056 ctx
->internal
->session_cache_head
= s
;
1057 ctx
->internal
->session_cache_tail
= s
;
1058 s
->internal
->prev
= (SSL_SESSION
*)&(ctx
->internal
->session_cache_head
);
1059 s
->internal
->next
= (SSL_SESSION
*)&(ctx
->internal
->session_cache_tail
);
1061 s
->internal
->next
= ctx
->internal
->session_cache_head
;
1062 s
->internal
->next
->internal
->prev
= s
;
1063 s
->internal
->prev
= (SSL_SESSION
*)&(ctx
->internal
->session_cache_head
);
1064 ctx
->internal
->session_cache_head
= s
;
1069 SSL_CTX_sess_set_new_cb(SSL_CTX
*ctx
,
1070 int (*cb
)(struct ssl_st
*ssl
, SSL_SESSION
*sess
)) {
1071 ctx
->internal
->new_session_cb
= cb
;
1075 (*SSL_CTX_sess_get_new_cb(SSL_CTX
*ctx
))(SSL
*ssl
, SSL_SESSION
*sess
)
1077 return ctx
->internal
->new_session_cb
;
1081 SSL_CTX_sess_set_remove_cb(SSL_CTX
*ctx
,
1082 void (*cb
)(SSL_CTX
*ctx
, SSL_SESSION
*sess
))
1084 ctx
->internal
->remove_session_cb
= cb
;
1088 (*SSL_CTX_sess_get_remove_cb(SSL_CTX
*ctx
))(SSL_CTX
* ctx
, SSL_SESSION
*sess
)
1090 return ctx
->internal
->remove_session_cb
;
1094 SSL_CTX_sess_set_get_cb(SSL_CTX
*ctx
, SSL_SESSION
*(*cb
)(struct ssl_st
*ssl
,
1095 const unsigned char *data
, int len
, int *copy
))
1097 ctx
->internal
->get_session_cb
= cb
;
1101 (*SSL_CTX_sess_get_get_cb(SSL_CTX
*ctx
))(SSL
*ssl
, const unsigned char *data
,
1104 return ctx
->internal
->get_session_cb
;
1108 SSL_CTX_set_info_callback(SSL_CTX
*ctx
,
1109 void (*cb
)(const SSL
*ssl
, int type
, int val
))
1111 ctx
->internal
->info_callback
= cb
;
1115 (*SSL_CTX_get_info_callback(SSL_CTX
*ctx
))(const SSL
*ssl
, int type
, int val
)
1117 return ctx
->internal
->info_callback
;
1121 SSL_CTX_set_client_cert_cb(SSL_CTX
*ctx
,
1122 int (*cb
)(SSL
*ssl
, X509
**x509
, EVP_PKEY
**pkey
))
1124 ctx
->internal
->client_cert_cb
= cb
;
1128 (*SSL_CTX_get_client_cert_cb(SSL_CTX
*ctx
))(SSL
* ssl
, X509
** x509
,
1131 return ctx
->internal
->client_cert_cb
;
1134 #ifndef OPENSSL_NO_ENGINE
1136 SSL_CTX_set_client_cert_engine(SSL_CTX
*ctx
, ENGINE
*e
)
1138 if (!ENGINE_init(e
)) {
1139 SSLerrorx(ERR_R_ENGINE_LIB
);
1142 if (!ENGINE_get_ssl_client_cert_function(e
)) {
1143 SSLerrorx(SSL_R_NO_CLIENT_CERT_METHOD
);
1147 ctx
->internal
->client_cert_engine
= e
;
1153 SSL_CTX_set_cookie_generate_cb(SSL_CTX
*ctx
,
1154 int (*cb
)(SSL
*ssl
, unsigned char *cookie
, unsigned int *cookie_len
))
1156 ctx
->internal
->app_gen_cookie_cb
= cb
;
1160 SSL_CTX_set_cookie_verify_cb(SSL_CTX
*ctx
,
1161 int (*cb
)(SSL
*ssl
, const unsigned char *cookie
, unsigned int cookie_len
))
1163 ctx
->internal
->app_verify_cookie_cb
= cb
;
1167 PEM_write_SSL_SESSION(FILE *fp
, SSL_SESSION
*x
)
1169 return PEM_ASN1_write((i2d_of_void
*)i2d_SSL_SESSION
,
1170 PEM_STRING_SSL_SESSION
, fp
, x
, NULL
, NULL
, 0, NULL
, NULL
);
1174 PEM_read_SSL_SESSION(FILE *fp
, SSL_SESSION
**x
, pem_password_cb
*cb
, void *u
)
1176 return PEM_ASN1_read((d2i_of_void
*)d2i_SSL_SESSION
,
1177 PEM_STRING_SSL_SESSION
, fp
, (void **)x
, cb
, u
);
1181 PEM_read_bio_SSL_SESSION(BIO
*bp
, SSL_SESSION
**x
, pem_password_cb
*cb
, void *u
)
1183 return PEM_ASN1_read_bio((d2i_of_void
*)d2i_SSL_SESSION
,
1184 PEM_STRING_SSL_SESSION
, bp
, (void **)x
, cb
, u
);
1188 PEM_write_bio_SSL_SESSION(BIO
*bp
, SSL_SESSION
*x
)
1190 return PEM_ASN1_write_bio((i2d_of_void
*)i2d_SSL_SESSION
,
1191 PEM_STRING_SSL_SESSION
, bp
, x
, NULL
, NULL
, 0, NULL
, NULL
);