| blob | cd312f832a12a9bbd7c8d45a06f9781e5103a31e |
1 #include <stdio.h>\r
2 #include <string.h>\r
3 \r
4 #include "puttymem.h"\r
5 #include "tree234.h"\r
6 #include "network.h"\r
7 #include "int64.h"\r
8 #include "misc.h"\r
9 \r
10 struct ssh_channel;\r
11 typedef struct ssh_tag *Ssh;\r
12 \r
13 extern int sshfwd_write(struct ssh_channel *c, char *, int);\r
14 extern void sshfwd_write_eof(struct ssh_channel *c);\r
15 extern void sshfwd_unclean_close(struct ssh_channel *c, const char *err);\r
16 extern void sshfwd_unthrottle(struct ssh_channel *c, int bufsize);\r
17 Conf *sshfwd_get_conf(struct ssh_channel *c);\r
18 void sshfwd_x11_sharing_handover(struct ssh_channel *c,\r
19 void *share_cs, void *share_chan,\r
20 const char *peer_addr, int peer_port,\r
21 int endian, int protomajor, int protominor,\r
22 const void *initial_data, int initial_len);\r
23 void sshfwd_x11_is_local(struct ssh_channel *c);\r
24 \r
25 extern Socket ssh_connection_sharing_init(const char *host, int port,\r
26 Conf *conf, Ssh ssh, void **state);\r
27 void share_got_pkt_from_server(void *ctx, int type,\r
28 unsigned char *pkt, int pktlen);\r
29 void share_activate(void *state, const char *server_verstring);\r
30 void sharestate_free(void *state);\r
31 int share_ndownstreams(void *state);\r
32 \r
33 void ssh_connshare_log(Ssh ssh, int event, const char *logtext,\r
34 const char *ds_err, const char *us_err);\r
35 unsigned ssh_alloc_sharing_channel(Ssh ssh, void *sharing_ctx);\r
36 void ssh_delete_sharing_channel(Ssh ssh, unsigned localid);\r
37 int ssh_alloc_sharing_rportfwd(Ssh ssh, const char *shost, int sport,\r
38 void *share_ctx);\r
39 void ssh_sharing_queue_global_request(Ssh ssh, void *share_ctx);\r
40 struct X11FakeAuth *ssh_sharing_add_x11_display(Ssh ssh, int authtype,\r
41 void *share_cs,\r
42 void *share_chan);\r
43 void ssh_sharing_remove_x11_display(Ssh ssh, struct X11FakeAuth *auth);\r
44 void ssh_send_packet_from_downstream(Ssh ssh, unsigned id, int type,\r
45 const void *pkt, int pktlen,\r
46 const char *additional_log_text);\r
47 void ssh_sharing_downstream_connected(Ssh ssh, unsigned id);\r
48 void ssh_sharing_downstream_disconnected(Ssh ssh, unsigned id);\r
49 void ssh_sharing_logf(Ssh ssh, unsigned id, const char *logfmt, ...);\r
50 int ssh_agent_forwarding_permitted(Ssh ssh);\r
51 void share_setup_x11_channel(void *csv, void *chanv,\r
52 unsigned upstream_id, unsigned server_id,\r
53 unsigned server_currwin, unsigned server_maxpkt,\r
54 unsigned client_adjusted_window,\r
55 const char *peer_addr, int peer_port, int endian,\r
56 int protomajor, int protominor,\r
57 const void *initial_data, int initial_len);\r
58 \r
59 /*\r
60 * Useful thing.\r
61 */\r
62 #ifndef lenof\r
63 #define lenof(x) ( (sizeof((x))) / (sizeof(*(x))))\r
64 #endif\r
65 \r
66 #define SSH_CIPHER_IDEA 1\r
67 #define SSH_CIPHER_DES 2\r
68 #define SSH_CIPHER_3DES 3\r
69 #define SSH_CIPHER_BLOWFISH 6\r
70 \r
71 #ifdef MSCRYPTOAPI\r
72 #define APIEXTRA 8\r
73 #else\r
74 #define APIEXTRA 0\r
75 #endif\r
76 \r
77 #ifndef BIGNUM_INTERNAL\r
78 typedef void *Bignum;\r
79 #endif\r
80 \r
81 struct RSAKey {\r
82 int bits;\r
83 int bytes;\r
84 #ifdef MSCRYPTOAPI\r
85 unsigned long exponent;\r
86 unsigned char *modulus;\r
87 #else\r
88 Bignum modulus;\r
89 Bignum exponent;\r
90 Bignum private_exponent;\r
91 Bignum p;\r
92 Bignum q;\r
93 Bignum iqmp;\r
94 #endif\r
95 char *comment;\r
96 };\r
97 \r
98 struct dss_key {\r
99 Bignum p, q, g, y, x;\r
100 };\r
101 \r
102 int makekey(unsigned char *data, int len, struct RSAKey *result,\r
103 unsigned char **keystr, int order);\r
104 int makeprivate(unsigned char *data, int len, struct RSAKey *result);\r
105 int rsaencrypt(unsigned char *data, int length, struct RSAKey *key);\r
106 Bignum rsadecrypt(Bignum input, struct RSAKey *key);\r
107 void rsasign(unsigned char *data, int length, struct RSAKey *key);\r
108 void rsasanitise(struct RSAKey *key);\r
109 int rsastr_len(struct RSAKey *key);\r
110 void rsastr_fmt(char *str, struct RSAKey *key);\r
111 void rsa_fingerprint(char *str, int len, struct RSAKey *key);\r
112 int rsa_verify(struct RSAKey *key);\r
113 unsigned char *rsa_public_blob(struct RSAKey *key, int *len);\r
114 int rsa_public_blob_len(void *data, int maxlen);\r
115 void freersakey(struct RSAKey *key);\r
116 \r
117 #ifndef PUTTY_UINT32_DEFINED\r
118 /* This makes assumptions about the int type. */\r
119 typedef unsigned int uint32;\r
120 #define PUTTY_UINT32_DEFINED\r
121 #endif\r
122 typedef uint32 word32;\r
123 \r
124 unsigned long crc32_compute(const void *s, size_t len);\r
125 unsigned long crc32_update(unsigned long crc_input, const void *s, size_t len);\r
126 \r
127 /* SSH CRC compensation attack detector */\r
128 void *crcda_make_context(void);\r
129 void crcda_free_context(void *handle);\r
130 int detect_attack(void *handle, unsigned char *buf, uint32 len,\r
131 unsigned char *IV);\r
132 \r
133 /*\r
134 * SSH2 RSA key exchange functions\r
135 */\r
136 struct ssh_hash;\r
137 void *ssh_rsakex_newkey(char *data, int len);\r
138 void ssh_rsakex_freekey(void *key);\r
139 int ssh_rsakex_klen(void *key);\r
140 void ssh_rsakex_encrypt(const struct ssh_hash *h, unsigned char *in, int inlen,\r
141 unsigned char *out, int outlen,\r
142 void *key);\r
143 \r
144 typedef struct {\r
145 uint32 h[4];\r
146 } MD5_Core_State;\r
147 \r
148 struct MD5Context {\r
149 #ifdef MSCRYPTOAPI\r
150 unsigned long hHash;\r
151 #else\r
152 MD5_Core_State core;\r
153 unsigned char block[64];\r
154 int blkused;\r
155 uint32 lenhi, lenlo;\r
156 #endif\r
157 };\r
158 \r
159 void MD5Init(struct MD5Context *context);\r
160 void MD5Update(struct MD5Context *context, unsigned char const *buf,\r
161 unsigned len);\r
162 void MD5Final(unsigned char digest[16], struct MD5Context *context);\r
163 void MD5Simple(void const *p, unsigned len, unsigned char output[16]);\r
164 \r
165 void *hmacmd5_make_context(void);\r
166 void hmacmd5_free_context(void *handle);\r
167 void hmacmd5_key(void *handle, void const *key, int len);\r
168 void hmacmd5_do_hmac(void *handle, unsigned char const *blk, int len,\r
169 unsigned char *hmac);\r
170 \r
171 typedef struct {\r
172 uint32 h[5];\r
173 unsigned char block[64];\r
174 int blkused;\r
175 uint32 lenhi, lenlo;\r
176 } SHA_State;\r
177 void SHA_Init(SHA_State * s);\r
178 void SHA_Bytes(SHA_State * s, const void *p, int len);\r
179 void SHA_Final(SHA_State * s, unsigned char *output);\r
180 void SHA_Simple(const void *p, int len, unsigned char *output);\r
181 \r
182 void hmac_sha1_simple(void *key, int keylen, void *data, int datalen,\r
183 unsigned char *output);\r
184 typedef struct {\r
185 uint32 h[8];\r
186 unsigned char block[64];\r
187 int blkused;\r
188 uint32 lenhi, lenlo;\r
189 } SHA256_State;\r
190 void SHA256_Init(SHA256_State * s);\r
191 void SHA256_Bytes(SHA256_State * s, const void *p, int len);\r
192 void SHA256_Final(SHA256_State * s, unsigned char *output);\r
193 void SHA256_Simple(const void *p, int len, unsigned char *output);\r
194 \r
195 typedef struct {\r
196 uint64 h[8];\r
197 unsigned char block[128];\r
198 int blkused;\r
199 uint32 len[4];\r
200 } SHA512_State;\r
201 void SHA512_Init(SHA512_State * s);\r
202 void SHA512_Bytes(SHA512_State * s, const void *p, int len);\r
203 void SHA512_Final(SHA512_State * s, unsigned char *output);\r
204 void SHA512_Simple(const void *p, int len, unsigned char *output);\r
205 \r
206 struct ssh_cipher {\r
207 void *(*make_context)(void);\r
208 void (*free_context)(void *);\r
209 void (*sesskey) (void *, unsigned char *key); /* for SSH-1 */\r
210 void (*encrypt) (void *, unsigned char *blk, int len);\r
211 void (*decrypt) (void *, unsigned char *blk, int len);\r
212 int blksize;\r
213 char *text_name;\r
214 };\r
215 \r
216 struct ssh2_cipher {\r
217 void *(*make_context)(void);\r
218 void (*free_context)(void *);\r
219 void (*setiv) (void *, unsigned char *key); /* for SSH-2 */\r
220 void (*setkey) (void *, unsigned char *key);/* for SSH-2 */\r
221 void (*encrypt) (void *, unsigned char *blk, int len);\r
222 void (*decrypt) (void *, unsigned char *blk, int len);\r
223 char *name;\r
224 int blksize;\r
225 int keylen;\r
226 unsigned int flags;\r
227 #define SSH_CIPHER_IS_CBC 1\r
228 char *text_name;\r
229 };\r
230 \r
231 struct ssh2_ciphers {\r
232 int nciphers;\r
233 const struct ssh2_cipher *const *list;\r
234 };\r
235 \r
236 struct ssh_mac {\r
237 void *(*make_context)(void);\r
238 void (*free_context)(void *);\r
239 void (*setkey) (void *, unsigned char *key);\r
240 /* whole-packet operations */\r
241 void (*generate) (void *, unsigned char *blk, int len, unsigned long seq);\r
242 int (*verify) (void *, unsigned char *blk, int len, unsigned long seq);\r
243 /* partial-packet operations */\r
244 void (*start) (void *);\r
245 void (*bytes) (void *, unsigned char const *, int);\r
246 void (*genresult) (void *, unsigned char *);\r
247 int (*verresult) (void *, unsigned char const *);\r
248 char *name;\r
249 int len;\r
250 char *text_name;\r
251 };\r
252 \r
253 struct ssh_hash {\r
254 void *(*init)(void); /* also allocates context */\r
255 void (*bytes)(void *, void *, int);\r
256 void (*final)(void *, unsigned char *); /* also frees context */\r
257 int hlen; /* output length in bytes */\r
258 char *text_name;\r
259 }; \r
260 \r
261 struct ssh_kex {\r
262 char *name, *groupname;\r
263 enum { KEXTYPE_DH, KEXTYPE_RSA } main_type;\r
264 /* For DH */\r
265 const unsigned char *pdata, *gdata; /* NULL means group exchange */\r
266 int plen, glen;\r
267 const struct ssh_hash *hash;\r
268 };\r
269 \r
270 struct ssh_kexes {\r
271 int nkexes;\r
272 const struct ssh_kex *const *list;\r
273 };\r
274 \r
275 struct ssh_signkey {\r
276 void *(*newkey) (char *data, int len);\r
277 void (*freekey) (void *key);\r
278 char *(*fmtkey) (void *key);\r
279 unsigned char *(*public_blob) (void *key, int *len);\r
280 unsigned char *(*private_blob) (void *key, int *len);\r
281 void *(*createkey) (unsigned char *pub_blob, int pub_len,\r
282 unsigned char *priv_blob, int priv_len);\r
283 void *(*openssh_createkey) (unsigned char **blob, int *len);\r
284 int (*openssh_fmtkey) (void *key, unsigned char *blob, int len);\r
285 int (*pubkey_bits) (void *blob, int len);\r
286 char *(*fingerprint) (void *key);\r
287 int (*verifysig) (void *key, char *sig, int siglen,\r
288 char *data, int datalen);\r
289 unsigned char *(*sign) (void *key, char *data, int datalen,\r
290 int *siglen);\r
291 char *name;\r
292 char *keytype; /* for host key cache */\r
293 };\r
294 \r
295 struct ssh_compress {\r
296 char *name;\r
297 /* For zlib@openssh.com: if non-NULL, this name will be considered once\r
298 * userauth has completed successfully. */\r
299 char *delayed_name;\r
300 void *(*compress_init) (void);\r
301 void (*compress_cleanup) (void *);\r
302 int (*compress) (void *, unsigned char *block, int len,\r
303 unsigned char **outblock, int *outlen);\r
304 void *(*decompress_init) (void);\r
305 void (*decompress_cleanup) (void *);\r
306 int (*decompress) (void *, unsigned char *block, int len,\r
307 unsigned char **outblock, int *outlen);\r
308 int (*disable_compression) (void *);\r
309 char *text_name;\r
310 };\r
311 \r
312 struct ssh2_userkey {\r
313 const struct ssh_signkey *alg; /* the key algorithm */\r
314 void *data; /* the key data */\r
315 char *comment; /* the key comment */\r
316 };\r
317 \r
318 /* The maximum length of any hash algorithm used in kex. (bytes) */\r
319 #define SSH2_KEX_MAX_HASH_LEN (32) /* SHA-256 */\r
320 \r
321 extern const struct ssh_cipher ssh_3des;\r
322 extern const struct ssh_cipher ssh_des;\r
323 extern const struct ssh_cipher ssh_blowfish_ssh1;\r
324 extern const struct ssh2_ciphers ssh2_3des;\r
325 extern const struct ssh2_ciphers ssh2_des;\r
326 extern const struct ssh2_ciphers ssh2_aes;\r
327 extern const struct ssh2_ciphers ssh2_blowfish;\r
328 extern const struct ssh2_ciphers ssh2_arcfour;\r
329 extern const struct ssh_hash ssh_sha1;\r
330 extern const struct ssh_hash ssh_sha256;\r
331 extern const struct ssh_kexes ssh_diffiehellman_group1;\r
332 extern const struct ssh_kexes ssh_diffiehellman_group14;\r
333 extern const struct ssh_kexes ssh_diffiehellman_gex;\r
334 extern const struct ssh_kexes ssh_rsa_kex;\r
335 extern const struct ssh_signkey ssh_dss;\r
336 extern const struct ssh_signkey ssh_rsa;\r
337 extern const struct ssh_mac ssh_hmac_md5;\r
338 extern const struct ssh_mac ssh_hmac_sha1;\r
339 extern const struct ssh_mac ssh_hmac_sha1_buggy;\r
340 extern const struct ssh_mac ssh_hmac_sha1_96;\r
341 extern const struct ssh_mac ssh_hmac_sha1_96_buggy;\r
342 extern const struct ssh_mac ssh_hmac_sha256;\r
343 \r
344 void *aes_make_context(void);\r
345 void aes_free_context(void *handle);\r
346 void aes128_key(void *handle, unsigned char *key);\r
347 void aes192_key(void *handle, unsigned char *key);\r
348 void aes256_key(void *handle, unsigned char *key);\r
349 void aes_iv(void *handle, unsigned char *iv);\r
350 void aes_ssh2_encrypt_blk(void *handle, unsigned char *blk, int len);\r
351 void aes_ssh2_decrypt_blk(void *handle, unsigned char *blk, int len);\r
352 \r
353 /*\r
354 * PuTTY version number formatted as an SSH version string. \r
355 */\r
356 extern char sshver[];\r
357 \r
358 /*\r
359 * Gross hack: pscp will try to start SFTP but fall back to scp1 if\r
360 * that fails. This variable is the means by which scp.c can reach\r
361 * into the SSH code and find out which one it got.\r
362 */\r
363 extern int ssh_fallback_cmd(void *handle);\r
364 \r
365 #ifndef MSCRYPTOAPI\r
366 void SHATransform(word32 * digest, word32 * data);\r
367 #endif\r
368 \r
369 int random_byte(void);\r
370 void random_add_noise(void *noise, int length);\r
371 void random_add_heavynoise(void *noise, int length);\r
372 \r
373 void logevent(void *, const char *);\r
374 \r
375 struct PortForwarding;\r
376 \r
377 /* Allocate and register a new channel for port forwarding */\r
378 void *new_sock_channel(void *handle, struct PortForwarding *pf);\r
379 void ssh_send_port_open(void *channel, char *hostname, int port, char *org);\r
380 \r
381 /* Exports from portfwd.c */\r
382 extern char *pfd_connect(struct PortForwarding **pf, char *hostname, int port,\r
383 void *c, Conf *conf, int addressfamily);\r
384 extern void pfd_close(struct PortForwarding *);\r
385 extern int pfd_send(struct PortForwarding *, char *data, int len);\r
386 extern void pfd_send_eof(struct PortForwarding *);\r
387 extern void pfd_confirm(struct PortForwarding *);\r
388 extern void pfd_unthrottle(struct PortForwarding *);\r
389 extern void pfd_override_throttle(struct PortForwarding *, int enable);\r
390 struct PortListener;\r
391 /* desthost == NULL indicates dynamic (SOCKS) port forwarding */\r
392 extern char *pfl_listen(char *desthost, int destport, char *srcaddr,\r
393 int port, void *backhandle, Conf *conf,\r
394 struct PortListener **pl, int address_family);\r
395 extern void pfl_terminate(struct PortListener *);\r
396 \r
397 /* Exports from x11fwd.c */\r
398 enum {\r
399 X11_TRANS_IPV4 = 0, X11_TRANS_IPV6 = 6, X11_TRANS_UNIX = 256\r
400 };\r
401 struct X11Display {\r
402 /* Broken-down components of the display name itself */\r
403 int unixdomain;\r
404 char *hostname;\r
405 int displaynum;\r
406 int screennum;\r
407 /* OSX sometimes replaces all the above with a full Unix-socket pathname */\r
408 char *unixsocketpath;\r
409 \r
410 /* PuTTY networking SockAddr to connect to the display, and associated\r
411 * gubbins */\r
412 SockAddr addr;\r
413 int port;\r
414 char *realhost;\r
415 \r
416 /* Our local auth details for talking to the real X display. */\r
417 int localauthproto;\r
418 unsigned char *localauthdata;\r
419 int localauthdatalen;\r
420 };\r
421 struct X11FakeAuth {\r
422 /* Auth details we invented for a virtual display on the SSH server. */\r
423 int proto;\r
424 unsigned char *data;\r
425 int datalen;\r
426 char *protoname;\r
427 char *datastring;\r
428 \r
429 /* The encrypted form of the first block, in XDM-AUTHORIZATION-1.\r
430 * Used as part of the key when these structures are organised\r
431 * into a tree. See x11_invent_fake_auth for explanation. */\r
432 unsigned char *xa1_firstblock;\r
433 \r
434 /*\r
435 * Used inside x11fwd.c to remember recently seen\r
436 * XDM-AUTHORIZATION-1 strings, to avoid replay attacks.\r
437 */\r
438 tree234 *xdmseen;\r
439 \r
440 /*\r
441 * What to do with an X connection matching this auth data.\r
442 */\r
443 struct X11Display *disp;\r
444 void *share_cs, *share_chan;\r
445 };\r
446 void *x11_make_greeting(int endian, int protomajor, int protominor,\r
447 int auth_proto, const void *auth_data, int auth_len,\r
448 const char *peer_ip, int peer_port,\r
449 int *outlen);\r
450 int x11_authcmp(void *av, void *bv); /* for putting X11FakeAuth in a tree234 */\r
451 /*\r
452 * x11_setup_display() parses the display variable and fills in an\r
453 * X11Display structure. Some remote auth details are invented;\r
454 * the supplied authtype parameter configures the preferred\r
455 * authorisation protocol to use at the remote end. The local auth\r
456 * details are looked up by calling platform_get_x11_auth.\r
457 */\r
458 extern struct X11Display *x11_setup_display(char *display, Conf *);\r
459 void x11_free_display(struct X11Display *disp);\r
460 struct X11FakeAuth *x11_invent_fake_auth(tree234 *t, int authtype);\r
461 void x11_free_fake_auth(struct X11FakeAuth *auth);\r
462 struct X11Connection; /* opaque outside x11fwd.c */\r
463 struct X11Connection *x11_init(tree234 *authtree, void *, const char *, int);\r
464 extern void x11_close(struct X11Connection *);\r
465 extern int x11_send(struct X11Connection *, char *, int);\r
466 extern void x11_send_eof(struct X11Connection *s);\r
467 extern void x11_unthrottle(struct X11Connection *s);\r
468 extern void x11_override_throttle(struct X11Connection *s, int enable);\r
469 char *x11_display(const char *display);\r
470 /* Platform-dependent X11 functions */\r
471 extern void platform_get_x11_auth(struct X11Display *display, Conf *);\r
472 /* examine a mostly-filled-in X11Display and fill in localauth* */\r
473 extern const int platform_uses_x11_unix_by_default;\r
474 /* choose default X transport in the absence of a specified one */\r
475 SockAddr platform_get_x11_unix_address(const char *path, int displaynum);\r
476 /* make up a SockAddr naming the address for displaynum */\r
477 char *platform_get_x_display(void);\r
478 /* allocated local X display string, if any */\r
479 /* Callbacks in x11.c usable _by_ platform X11 functions */\r
480 /*\r
481 * This function does the job of platform_get_x11_auth, provided\r
482 * it is told where to find a normally formatted .Xauthority file:\r
483 * it opens that file, parses it to find an auth record which\r
484 * matches the display details in "display", and fills in the\r
485 * localauth fields.\r
486 *\r
487 * It is expected that most implementations of\r
488 * platform_get_x11_auth() will work by finding their system's\r
489 * .Xauthority file, adjusting the display details if necessary\r
490 * for local oddities like Unix-domain socket transport, and\r
491 * calling this function to do the rest of the work.\r
492 */\r
493 void x11_get_auth_from_authfile(struct X11Display *display,\r
494 const char *authfilename);\r
495 int x11_identify_auth_proto(const char *proto);\r
496 void *x11_dehexify(const char *hex, int *outlen);\r
497 \r
498 Bignum copybn(Bignum b);\r
499 Bignum bn_power_2(int n);\r
500 void bn_restore_invariant(Bignum b);\r
501 Bignum bignum_from_long(unsigned long n);\r
502 void freebn(Bignum b);\r
503 Bignum modpow(Bignum base, Bignum exp, Bignum mod);\r
504 Bignum modmul(Bignum a, Bignum b, Bignum mod);\r
505 void decbn(Bignum n);\r
506 extern Bignum Zero, One;\r
507 Bignum bignum_from_bytes(const unsigned char *data, int nbytes);\r
508 int ssh1_read_bignum(const unsigned char *data, int len, Bignum * result);\r
509 int bignum_bitcount(Bignum bn);\r
510 int ssh1_bignum_length(Bignum bn);\r
511 int ssh2_bignum_length(Bignum bn);\r
512 int bignum_byte(Bignum bn, int i);\r
513 int bignum_bit(Bignum bn, int i);\r
514 void bignum_set_bit(Bignum bn, int i, int value);\r
515 int ssh1_write_bignum(void *data, Bignum bn);\r
516 Bignum biggcd(Bignum a, Bignum b);\r
517 unsigned short bignum_mod_short(Bignum number, unsigned short modulus);\r
518 Bignum bignum_add_long(Bignum number, unsigned long addend);\r
519 Bignum bigadd(Bignum a, Bignum b);\r
520 Bignum bigsub(Bignum a, Bignum b);\r
521 Bignum bigmul(Bignum a, Bignum b);\r
522 Bignum bigmuladd(Bignum a, Bignum b, Bignum addend);\r
523 Bignum bigdiv(Bignum a, Bignum b);\r
524 Bignum bigmod(Bignum a, Bignum b);\r
525 Bignum modinv(Bignum number, Bignum modulus);\r
526 Bignum bignum_bitmask(Bignum number);\r
527 Bignum bignum_rshift(Bignum number, int shift);\r
528 int bignum_cmp(Bignum a, Bignum b);\r
529 char *bignum_decimal(Bignum x);\r
530 \r
531 #ifdef DEBUG\r
532 void diagbn(char *prefix, Bignum md);\r
533 #endif\r
534 \r
535 void *dh_setup_group(const struct ssh_kex *kex);\r
536 void *dh_setup_gex(Bignum pval, Bignum gval);\r
537 void dh_cleanup(void *);\r
538 Bignum dh_create_e(void *, int nbits);\r
539 const char *dh_validate_f(void *handle, Bignum f);\r
540 Bignum dh_find_K(void *, Bignum f);\r
541 \r
542 int loadrsakey(const Filename *filename, struct RSAKey *key,\r
543 char *passphrase, const char **errorstr);\r
544 int rsakey_encrypted(const Filename *filename, char **comment);\r
545 int rsakey_pubblob(const Filename *filename, void **blob, int *bloblen,\r
546 char **commentptr, const char **errorstr);\r
547 \r
548 int saversakey(const Filename *filename, struct RSAKey *key, char *passphrase);\r
549 \r
550 extern int base64_decode_atom(char *atom, unsigned char *out);\r
551 extern int base64_lines(int datalen);\r
552 extern void base64_encode_atom(unsigned char *data, int n, char *out);\r
553 extern void base64_encode(FILE *fp, unsigned char *data, int datalen, int cpl);\r
554 \r
555 /* ssh2_load_userkey can return this as an error */\r
556 extern struct ssh2_userkey ssh2_wrong_passphrase;\r
557 #define SSH2_WRONG_PASSPHRASE (&ssh2_wrong_passphrase)\r
558 \r
559 int ssh2_userkey_encrypted(const Filename *filename, char **comment);\r
560 struct ssh2_userkey *ssh2_load_userkey(const Filename *filename,\r
561 char *passphrase, const char **errorstr);\r
562 unsigned char *ssh2_userkey_loadpub(const Filename *filename, char **algorithm,\r
563 int *pub_blob_len, char **commentptr,\r
564 const char **errorstr);\r
565 int ssh2_save_userkey(const Filename *filename, struct ssh2_userkey *key,\r
566 char *passphrase);\r
567 const struct ssh_signkey *find_pubkey_alg(const char *name);\r
568 \r
569 enum {\r
570 SSH_KEYTYPE_UNOPENABLE,\r
571 SSH_KEYTYPE_UNKNOWN,\r
572 SSH_KEYTYPE_SSH1, SSH_KEYTYPE_SSH2,\r
573 SSH_KEYTYPE_OPENSSH, SSH_KEYTYPE_SSHCOM\r
574 };\r
575 int key_type(const Filename *filename);\r
576 char *key_type_to_str(int type);\r
577 \r
578 int import_possible(int type);\r
579 int import_target_type(int type);\r
580 int import_encrypted(const Filename *filename, int type, char **comment);\r
581 int import_ssh1(const Filename *filename, int type,\r
582 struct RSAKey *key, char *passphrase, const char **errmsg_p);\r
583 struct ssh2_userkey *import_ssh2(const Filename *filename, int type,\r
584 char *passphrase, const char **errmsg_p);\r
585 int export_ssh1(const Filename *filename, int type,\r
586 struct RSAKey *key, char *passphrase);\r
587 int export_ssh2(const Filename *filename, int type,\r
588 struct ssh2_userkey *key, char *passphrase);\r
589 \r
590 void des3_decrypt_pubkey(unsigned char *key, unsigned char *blk, int len);\r
591 void des3_encrypt_pubkey(unsigned char *key, unsigned char *blk, int len);\r
592 void des3_decrypt_pubkey_ossh(unsigned char *key, unsigned char *iv,\r
593 unsigned char *blk, int len);\r
594 void des3_encrypt_pubkey_ossh(unsigned char *key, unsigned char *iv,\r
595 unsigned char *blk, int len);\r
596 void aes256_encrypt_pubkey(unsigned char *key, unsigned char *blk,\r
597 int len);\r
598 void aes256_decrypt_pubkey(unsigned char *key, unsigned char *blk,\r
599 int len);\r
600 \r
601 void des_encrypt_xdmauth(const unsigned char *key,\r
602 unsigned char *blk, int len);\r
603 void des_decrypt_xdmauth(const unsigned char *key,\r
604 unsigned char *blk, int len);\r
605 \r
606 /*\r
607 * For progress updates in the key generation utility.\r
608 */\r
609 #define PROGFN_INITIALISE 1\r
610 #define PROGFN_LIN_PHASE 2\r
611 #define PROGFN_EXP_PHASE 3\r
612 #define PROGFN_PHASE_EXTENT 4\r
613 #define PROGFN_READY 5\r
614 #define PROGFN_PROGRESS 6\r
615 typedef void (*progfn_t) (void *param, int action, int phase, int progress);\r
616 \r
617 int rsa_generate(struct RSAKey *key, int bits, progfn_t pfn,\r
618 void *pfnparam);\r
619 int dsa_generate(struct dss_key *key, int bits, progfn_t pfn,\r
620 void *pfnparam);\r
621 Bignum primegen(int bits, int modulus, int residue, Bignum factor,\r
622 int phase, progfn_t pfn, void *pfnparam, unsigned firstbits);\r
623 void invent_firstbits(unsigned *one, unsigned *two);\r
624 \r
625 \r
626 /*\r
627 * zlib compression.\r
628 */\r
629 void *zlib_compress_init(void);\r
630 void zlib_compress_cleanup(void *);\r
631 void *zlib_decompress_init(void);\r
632 void zlib_decompress_cleanup(void *);\r
633 int zlib_compress_block(void *, unsigned char *block, int len,\r
634 unsigned char **outblock, int *outlen);\r
635 int zlib_decompress_block(void *, unsigned char *block, int len,\r
636 unsigned char **outblock, int *outlen);\r
637 \r
638 /*\r
639 * Connection-sharing API provided by platforms. This function must\r
640 * either:\r
641 * - return SHARE_NONE and do nothing\r
642 * - return SHARE_DOWNSTREAM and set *sock to a Socket connected to\r
643 * downplug\r
644 * - return SHARE_UPSTREAM and set *sock to a Socket connected to\r
645 * upplug.\r
646 */\r
647 enum { SHARE_NONE, SHARE_DOWNSTREAM, SHARE_UPSTREAM };\r
648 int platform_ssh_share(const char *name, Conf *conf,\r
649 Plug downplug, Plug upplug, Socket *sock,\r
650 char **logtext, char **ds_err, char **us_err,\r
651 int can_upstream, int can_downstream);\r
652 void platform_ssh_share_cleanup(const char *name);\r
653 \r
654 /*\r
655 * SSH-1 message type codes.\r
656 */\r
657 #define SSH1_MSG_DISCONNECT 1 /* 0x1 */\r
658 #define SSH1_SMSG_PUBLIC_KEY 2 /* 0x2 */\r
659 #define SSH1_CMSG_SESSION_KEY 3 /* 0x3 */\r
660 #define SSH1_CMSG_USER 4 /* 0x4 */\r
661 #define SSH1_CMSG_AUTH_RSA 6 /* 0x6 */\r
662 #define SSH1_SMSG_AUTH_RSA_CHALLENGE 7 /* 0x7 */\r
663 #define SSH1_CMSG_AUTH_RSA_RESPONSE 8 /* 0x8 */\r
664 #define SSH1_CMSG_AUTH_PASSWORD 9 /* 0x9 */\r
665 #define SSH1_CMSG_REQUEST_PTY 10 /* 0xa */\r
666 #define SSH1_CMSG_WINDOW_SIZE 11 /* 0xb */\r
667 #define SSH1_CMSG_EXEC_SHELL 12 /* 0xc */\r
668 #define SSH1_CMSG_EXEC_CMD 13 /* 0xd */\r
669 #define SSH1_SMSG_SUCCESS 14 /* 0xe */\r
670 #define SSH1_SMSG_FAILURE 15 /* 0xf */\r
671 #define SSH1_CMSG_STDIN_DATA 16 /* 0x10 */\r
672 #define SSH1_SMSG_STDOUT_DATA 17 /* 0x11 */\r
673 #define SSH1_SMSG_STDERR_DATA 18 /* 0x12 */\r
674 #define SSH1_CMSG_EOF 19 /* 0x13 */\r
675 #define SSH1_SMSG_EXIT_STATUS 20 /* 0x14 */\r
676 #define SSH1_MSG_CHANNEL_OPEN_CONFIRMATION 21 /* 0x15 */\r
677 #define SSH1_MSG_CHANNEL_OPEN_FAILURE 22 /* 0x16 */\r
678 #define SSH1_MSG_CHANNEL_DATA 23 /* 0x17 */\r
679 #define SSH1_MSG_CHANNEL_CLOSE 24 /* 0x18 */\r
680 #define SSH1_MSG_CHANNEL_CLOSE_CONFIRMATION 25 /* 0x19 */\r
681 #define SSH1_SMSG_X11_OPEN 27 /* 0x1b */\r
682 #define SSH1_CMSG_PORT_FORWARD_REQUEST 28 /* 0x1c */\r
683 #define SSH1_MSG_PORT_OPEN 29 /* 0x1d */\r
684 #define SSH1_CMSG_AGENT_REQUEST_FORWARDING 30 /* 0x1e */\r
685 #define SSH1_SMSG_AGENT_OPEN 31 /* 0x1f */\r
686 #define SSH1_MSG_IGNORE 32 /* 0x20 */\r
687 #define SSH1_CMSG_EXIT_CONFIRMATION 33 /* 0x21 */\r
688 #define SSH1_CMSG_X11_REQUEST_FORWARDING 34 /* 0x22 */\r
689 #define SSH1_CMSG_AUTH_RHOSTS_RSA 35 /* 0x23 */\r
690 #define SSH1_MSG_DEBUG 36 /* 0x24 */\r
691 #define SSH1_CMSG_REQUEST_COMPRESSION 37 /* 0x25 */\r
692 #define SSH1_CMSG_AUTH_TIS 39 /* 0x27 */\r
693 #define SSH1_SMSG_AUTH_TIS_CHALLENGE 40 /* 0x28 */\r
694 #define SSH1_CMSG_AUTH_TIS_RESPONSE 41 /* 0x29 */\r
695 #define SSH1_CMSG_AUTH_CCARD 70 /* 0x46 */\r
696 #define SSH1_SMSG_AUTH_CCARD_CHALLENGE 71 /* 0x47 */\r
697 #define SSH1_CMSG_AUTH_CCARD_RESPONSE 72 /* 0x48 */\r
698 \r
699 #define SSH1_AUTH_RHOSTS 1 /* 0x1 */\r
700 #define SSH1_AUTH_RSA 2 /* 0x2 */\r
701 #define SSH1_AUTH_PASSWORD 3 /* 0x3 */\r
702 #define SSH1_AUTH_RHOSTS_RSA 4 /* 0x4 */\r
703 #define SSH1_AUTH_TIS 5 /* 0x5 */\r
704 #define SSH1_AUTH_CCARD 16 /* 0x10 */\r
705 \r
706 #define SSH1_PROTOFLAG_SCREEN_NUMBER 1 /* 0x1 */\r
707 /* Mask for protoflags we will echo back to server if seen */\r
708 #define SSH1_PROTOFLAGS_SUPPORTED 0 /* 0x1 */\r
709 \r
710 /*\r
711 * SSH-2 message type codes.\r
712 */\r
713 #define SSH2_MSG_DISCONNECT 1 /* 0x1 */\r
714 #define SSH2_MSG_IGNORE 2 /* 0x2 */\r
715 #define SSH2_MSG_UNIMPLEMENTED 3 /* 0x3 */\r
716 #define SSH2_MSG_DEBUG 4 /* 0x4 */\r
717 #define SSH2_MSG_SERVICE_REQUEST 5 /* 0x5 */\r
718 #define SSH2_MSG_SERVICE_ACCEPT 6 /* 0x6 */\r
719 #define SSH2_MSG_KEXINIT 20 /* 0x14 */\r
720 #define SSH2_MSG_NEWKEYS 21 /* 0x15 */\r
721 #define SSH2_MSG_KEXDH_INIT 30 /* 0x1e */\r
722 #define SSH2_MSG_KEXDH_REPLY 31 /* 0x1f */\r
723 #define SSH2_MSG_KEX_DH_GEX_REQUEST 30 /* 0x1e */\r
724 #define SSH2_MSG_KEX_DH_GEX_GROUP 31 /* 0x1f */\r
725 #define SSH2_MSG_KEX_DH_GEX_INIT 32 /* 0x20 */\r
726 #define SSH2_MSG_KEX_DH_GEX_REPLY 33 /* 0x21 */\r
727 #define SSH2_MSG_KEXRSA_PUBKEY 30 /* 0x1e */\r
728 #define SSH2_MSG_KEXRSA_SECRET 31 /* 0x1f */\r
729 #define SSH2_MSG_KEXRSA_DONE 32 /* 0x20 */\r
730 #define SSH2_MSG_USERAUTH_REQUEST 50 /* 0x32 */\r
731 #define SSH2_MSG_USERAUTH_FAILURE 51 /* 0x33 */\r
732 #define SSH2_MSG_USERAUTH_SUCCESS 52 /* 0x34 */\r
733 #define SSH2_MSG_USERAUTH_BANNER 53 /* 0x35 */\r
734 #define SSH2_MSG_USERAUTH_PK_OK 60 /* 0x3c */\r
735 #define SSH2_MSG_USERAUTH_PASSWD_CHANGEREQ 60 /* 0x3c */\r
736 #define SSH2_MSG_USERAUTH_INFO_REQUEST 60 /* 0x3c */\r
737 #define SSH2_MSG_USERAUTH_INFO_RESPONSE 61 /* 0x3d */\r
738 #define SSH2_MSG_GLOBAL_REQUEST 80 /* 0x50 */\r
739 #define SSH2_MSG_REQUEST_SUCCESS 81 /* 0x51 */\r
740 #define SSH2_MSG_REQUEST_FAILURE 82 /* 0x52 */\r
741 #define SSH2_MSG_CHANNEL_OPEN 90 /* 0x5a */\r
742 #define SSH2_MSG_CHANNEL_OPEN_CONFIRMATION 91 /* 0x5b */\r
743 #define SSH2_MSG_CHANNEL_OPEN_FAILURE 92 /* 0x5c */\r
744 #define SSH2_MSG_CHANNEL_WINDOW_ADJUST 93 /* 0x5d */\r
745 #define SSH2_MSG_CHANNEL_DATA 94 /* 0x5e */\r
746 #define SSH2_MSG_CHANNEL_EXTENDED_DATA 95 /* 0x5f */\r
747 #define SSH2_MSG_CHANNEL_EOF 96 /* 0x60 */\r
748 #define SSH2_MSG_CHANNEL_CLOSE 97 /* 0x61 */\r
749 #define SSH2_MSG_CHANNEL_REQUEST 98 /* 0x62 */\r
750 #define SSH2_MSG_CHANNEL_SUCCESS 99 /* 0x63 */\r
751 #define SSH2_MSG_CHANNEL_FAILURE 100 /* 0x64 */\r
752 #define SSH2_MSG_USERAUTH_GSSAPI_RESPONSE 60\r
753 #define SSH2_MSG_USERAUTH_GSSAPI_TOKEN 61\r
754 #define SSH2_MSG_USERAUTH_GSSAPI_EXCHANGE_COMPLETE 63\r
755 #define SSH2_MSG_USERAUTH_GSSAPI_ERROR 64\r
756 #define SSH2_MSG_USERAUTH_GSSAPI_ERRTOK 65\r
757 #define SSH2_MSG_USERAUTH_GSSAPI_MIC 66\r
758 \r
759 /*\r
760 * SSH-1 agent messages.\r
761 */\r
762 #define SSH1_AGENTC_REQUEST_RSA_IDENTITIES 1\r
763 #define SSH1_AGENT_RSA_IDENTITIES_ANSWER 2\r
764 #define SSH1_AGENTC_RSA_CHALLENGE 3\r
765 #define SSH1_AGENT_RSA_RESPONSE 4\r
766 #define SSH1_AGENTC_ADD_RSA_IDENTITY 7\r
767 #define SSH1_AGENTC_REMOVE_RSA_IDENTITY 8\r
768 #define SSH1_AGENTC_REMOVE_ALL_RSA_IDENTITIES 9 /* openssh private? */\r
769 \r
770 /*\r
771 * Messages common to SSH-1 and OpenSSH's SSH-2.\r
772 */\r
773 #define SSH_AGENT_FAILURE 5\r
774 #define SSH_AGENT_SUCCESS 6\r
775 \r
776 /*\r
777 * OpenSSH's SSH-2 agent messages.\r
778 */\r
779 #define SSH2_AGENTC_REQUEST_IDENTITIES 11\r
780 #define SSH2_AGENT_IDENTITIES_ANSWER 12\r
781 #define SSH2_AGENTC_SIGN_REQUEST 13\r
782 #define SSH2_AGENT_SIGN_RESPONSE 14\r
783 #define SSH2_AGENTC_ADD_IDENTITY 17\r
784 #define SSH2_AGENTC_REMOVE_IDENTITY 18\r
785 #define SSH2_AGENTC_REMOVE_ALL_IDENTITIES 19\r
786 \r
787 /*\r
788 * Assorted other SSH-related enumerations.\r
789 */\r
790 #define SSH2_DISCONNECT_HOST_NOT_ALLOWED_TO_CONNECT 1 /* 0x1 */\r
791 #define SSH2_DISCONNECT_PROTOCOL_ERROR 2 /* 0x2 */\r
792 #define SSH2_DISCONNECT_KEY_EXCHANGE_FAILED 3 /* 0x3 */\r
793 #define SSH2_DISCONNECT_HOST_AUTHENTICATION_FAILED 4 /* 0x4 */\r
794 #define SSH2_DISCONNECT_MAC_ERROR 5 /* 0x5 */\r
795 #define SSH2_DISCONNECT_COMPRESSION_ERROR 6 /* 0x6 */\r
796 #define SSH2_DISCONNECT_SERVICE_NOT_AVAILABLE 7 /* 0x7 */\r
797 #define SSH2_DISCONNECT_PROTOCOL_VERSION_NOT_SUPPORTED 8 /* 0x8 */\r
798 #define SSH2_DISCONNECT_HOST_KEY_NOT_VERIFIABLE 9 /* 0x9 */\r
799 #define SSH2_DISCONNECT_CONNECTION_LOST 10 /* 0xa */\r
800 #define SSH2_DISCONNECT_BY_APPLICATION 11 /* 0xb */\r
801 #define SSH2_DISCONNECT_TOO_MANY_CONNECTIONS 12 /* 0xc */\r
802 #define SSH2_DISCONNECT_AUTH_CANCELLED_BY_USER 13 /* 0xd */\r
803 #define SSH2_DISCONNECT_NO_MORE_AUTH_METHODS_AVAILABLE 14 /* 0xe */\r
804 #define SSH2_DISCONNECT_ILLEGAL_USER_NAME 15 /* 0xf */\r
805 \r
806 #define SSH2_OPEN_ADMINISTRATIVELY_PROHIBITED 1 /* 0x1 */\r
807 #define SSH2_OPEN_CONNECT_FAILED 2 /* 0x2 */\r
808 #define SSH2_OPEN_UNKNOWN_CHANNEL_TYPE 3 /* 0x3 */\r
809 #define SSH2_OPEN_RESOURCE_SHORTAGE 4 /* 0x4 */\r
810 \r
811 #define SSH2_EXTENDED_DATA_STDERR 1 /* 0x1 */\r
812 \r
813 /*\r
814 * Need this to warn about support for the original SSH-2 keyfile\r
815 * format.\r
816 */\r
817 void old_keyfile_warning(void);\r