]>
Commit | Line | Data |
---|---|---|
d02b48c6 | 1 | /* ssl/ssl_sess.c */ |
58964a49 | 2 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
d02b48c6 RE |
3 | * All rights reserved. |
4 | * | |
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. | |
40720ce3 | 8 | * |
d02b48c6 RE |
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). | |
40720ce3 | 15 | * |
d02b48c6 RE |
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. | |
40720ce3 | 22 | * |
d02b48c6 RE |
23 | * Redistribution and use in source and binary forms, with or without |
24 | * modification, are permitted provided that the following conditions | |
25 | * are met: | |
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 :-). | |
40720ce3 | 37 | * 4. If you include any Windows specific code (or a derivative thereof) from |
d02b48c6 RE |
38 | * the apps directory (application code) you must include an acknowledgement: |
39 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" | |
40720ce3 | 40 | * |
d02b48c6 RE |
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 | |
51 | * SUCH DAMAGE. | |
40720ce3 | 52 | * |
d02b48c6 RE |
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.] | |
57 | */ | |
58 | ||
59 | #include <stdio.h> | |
ec577822 BM |
60 | #include <openssl/lhash.h> |
61 | #include <openssl/rand.h> | |
4aefb1dd | 62 | #ifndef OPENSSL_NO_ENGINE |
40720ce3 | 63 | # include <openssl/engine.h> |
4aefb1dd | 64 | #endif |
d02b48c6 RE |
65 | #include "ssl_locl.h" |
66 | ||
58964a49 | 67 | static void SSL_SESSION_list_remove(SSL_CTX *ctx, SSL_SESSION *s); |
40720ce3 | 68 | static void SSL_SESSION_list_add(SSL_CTX *ctx, SSL_SESSION *s); |
801294f8 | 69 | static int remove_session_lock(SSL_CTX *ctx, SSL_SESSION *c, int lck); |
58964a49 | 70 | |
0821bcd4 | 71 | SSL_SESSION *SSL_get_session(const SSL *ssl) |
52732b38 | 72 | /* aka SSL_get0_session; gets 0 objects, just returns a copy of the pointer */ |
40720ce3 MC |
73 | { |
74 | return (ssl->session); | |
75 | } | |
52732b38 BM |
76 | |
77 | SSL_SESSION *SSL_get1_session(SSL *ssl) | |
78 | /* variant of SSL_get_session: caller really gets something */ | |
40720ce3 MC |
79 | { |
80 | SSL_SESSION *sess; | |
81 | /* | |
82 | * Need to lock this all up rather than just use CRYPTO_add so that | |
83 | * somebody doesn't free ssl->session between when we check it's non-null | |
84 | * and when we up the reference count. | |
85 | */ | |
86 | CRYPTO_w_lock(CRYPTO_LOCK_SSL_SESSION); | |
87 | sess = ssl->session; | |
88 | if (sess) | |
89 | sess->references++; | |
90 | CRYPTO_w_unlock(CRYPTO_LOCK_SSL_SESSION); | |
91 | return (sess); | |
92 | } | |
93 | ||
94 | int SSL_SESSION_get_ex_new_index(long argl, void *argp, | |
95 | CRYPTO_EX_new *new_func, | |
96 | CRYPTO_EX_dup *dup_func, | |
97 | CRYPTO_EX_free *free_func) | |
98 | { | |
99 | return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL_SESSION, argl, argp, | |
100 | new_func, dup_func, free_func); | |
101 | } | |
58964a49 | 102 | |
6b691a5c | 103 | int SSL_SESSION_set_ex_data(SSL_SESSION *s, int idx, void *arg) |
40720ce3 MC |
104 | { |
105 | return (CRYPTO_set_ex_data(&s->ex_data, idx, arg)); | |
106 | } | |
58964a49 | 107 | |
0821bcd4 | 108 | void *SSL_SESSION_get_ex_data(const SSL_SESSION *s, int idx) |
40720ce3 MC |
109 | { |
110 | return (CRYPTO_get_ex_data(&s->ex_data, idx)); | |
111 | } | |
58964a49 | 112 | |
6b691a5c | 113 | SSL_SESSION *SSL_SESSION_new(void) |
40720ce3 MC |
114 | { |
115 | SSL_SESSION *ss; | |
116 | ||
117 | ss = (SSL_SESSION *)OPENSSL_malloc(sizeof(SSL_SESSION)); | |
118 | if (ss == NULL) { | |
119 | SSLerr(SSL_F_SSL_SESSION_NEW, ERR_R_MALLOC_FAILURE); | |
120 | return (0); | |
121 | } | |
122 | memset(ss, 0, sizeof(SSL_SESSION)); | |
123 | ||
124 | ss->verify_result = 1; /* avoid 0 (= X509_V_OK) just in case */ | |
125 | ss->references = 1; | |
126 | ss->timeout = 60 * 5 + 4; /* 5 minute timeout by default */ | |
127 | ss->time = (unsigned long)time(NULL); | |
128 | ss->prev = NULL; | |
129 | ss->next = NULL; | |
130 | ss->compress_meth = 0; | |
865a90eb | 131 | #ifndef OPENSSL_NO_TLSEXT |
40720ce3 | 132 | ss->tlsext_hostname = NULL; |
865a90eb | 133 | #endif |
40720ce3 MC |
134 | CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_SESSION, ss, &ss->ex_data); |
135 | return (ss); | |
136 | } | |
137 | ||
138 | const unsigned char *SSL_SESSION_get_id(const SSL_SESSION *s, | |
139 | unsigned int *len) | |
140 | { | |
141 | if (len) | |
142 | *len = s->session_id_length; | |
143 | return s->session_id; | |
144 | } | |
145 | ||
146 | /* | |
147 | * Even with SSLv2, we have 16 bytes (128 bits) of session ID space. | |
148 | * SSLv3/TLSv1 has 32 bytes (256 bits). As such, filling the ID with random | |
149 | * gunk repeatedly until we have no conflict is going to complete in one | |
150 | * iteration pretty much "most" of the time (btw: understatement). So, if it | |
151 | * takes us 10 iterations and we still can't avoid a conflict - well that's a | |
152 | * reasonable point to call it quits. Either the RAND code is broken or | |
153 | * someone is trying to open roughly very close to 2^128 (or 2^256) SSL | |
154 | * sessions to our server. How you might store that many sessions is perhaps | |
155 | * a more interesting question ... | |
156 | */ | |
dc644fe2 GT |
157 | |
158 | #define MAX_SESS_ID_ATTEMPTS 10 | |
159 | static int def_generate_session_id(const SSL *ssl, unsigned char *id, | |
40720ce3 MC |
160 | unsigned int *id_len) |
161 | { | |
162 | unsigned int retry = 0; | |
163 | do | |
164 | if (RAND_pseudo_bytes(id, *id_len) <= 0) | |
165 | return 0; | |
166 | while (SSL_has_matching_session_id(ssl, id, *id_len) && | |
167 | (++retry < MAX_SESS_ID_ATTEMPTS)) ; | |
168 | if (retry < MAX_SESS_ID_ATTEMPTS) | |
169 | return 1; | |
170 | /* else - woops a session_id match */ | |
171 | /* | |
172 | * XXX We should also check the external cache -- but the probability of | |
173 | * a collision is negligible, and we could not prevent the concurrent | |
174 | * creation of sessions with identical IDs since we currently don't have | |
175 | * means to atomically check whether a session ID already exists and make | |
176 | * a reservation for it if it does not (this problem applies to the | |
177 | * internal cache as well). | |
178 | */ | |
179 | return 0; | |
dc644fe2 GT |
180 | } |
181 | ||
6b691a5c | 182 | int ssl_get_new_session(SSL *s, int session) |
40720ce3 MC |
183 | { |
184 | /* This gets used by clients and servers. */ | |
185 | ||
186 | unsigned int tmp; | |
187 | SSL_SESSION *ss = NULL; | |
188 | GEN_SESSION_CB cb = def_generate_session_id; | |
189 | ||
190 | if ((ss = SSL_SESSION_new()) == NULL) | |
191 | return (0); | |
192 | ||
193 | /* If the context has a default timeout, use it */ | |
194 | if (s->ctx->session_timeout == 0) | |
195 | ss->timeout = SSL_get_default_timeout(s); | |
196 | else | |
197 | ss->timeout = s->ctx->session_timeout; | |
198 | ||
199 | if (s->session != NULL) { | |
200 | SSL_SESSION_free(s->session); | |
201 | s->session = NULL; | |
202 | } | |
203 | ||
204 | if (session) { | |
205 | if (s->version == SSL2_VERSION) { | |
206 | ss->ssl_version = SSL2_VERSION; | |
207 | ss->session_id_length = SSL2_SSL_SESSION_ID_LENGTH; | |
208 | } else if (s->version == SSL3_VERSION) { | |
209 | ss->ssl_version = SSL3_VERSION; | |
210 | ss->session_id_length = SSL3_SSL_SESSION_ID_LENGTH; | |
211 | } else if (s->version == TLS1_VERSION) { | |
212 | ss->ssl_version = TLS1_VERSION; | |
213 | ss->session_id_length = SSL3_SSL_SESSION_ID_LENGTH; | |
214 | } else if (s->version == DTLS1_BAD_VER) { | |
215 | ss->ssl_version = DTLS1_BAD_VER; | |
216 | ss->session_id_length = SSL3_SSL_SESSION_ID_LENGTH; | |
217 | } else if (s->version == DTLS1_VERSION) { | |
218 | ss->ssl_version = DTLS1_VERSION; | |
219 | ss->session_id_length = SSL3_SSL_SESSION_ID_LENGTH; | |
220 | } else { | |
221 | SSLerr(SSL_F_SSL_GET_NEW_SESSION, SSL_R_UNSUPPORTED_SSL_VERSION); | |
222 | SSL_SESSION_free(ss); | |
223 | return (0); | |
224 | } | |
865a90eb | 225 | #ifndef OPENSSL_NO_TLSEXT |
40720ce3 MC |
226 | /* If RFC4507 ticket use empty session ID */ |
227 | if (s->tlsext_ticket_expected) { | |
228 | ss->session_id_length = 0; | |
229 | goto sess_id_done; | |
230 | } | |
865a90eb | 231 | #endif |
40720ce3 MC |
232 | /* Choose which callback will set the session ID */ |
233 | CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX); | |
234 | if (s->generate_session_id) | |
235 | cb = s->generate_session_id; | |
236 | else if (s->ctx->generate_session_id) | |
237 | cb = s->ctx->generate_session_id; | |
238 | CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX); | |
239 | /* Choose a session ID */ | |
240 | tmp = ss->session_id_length; | |
241 | if (!cb(s, ss->session_id, &tmp)) { | |
242 | /* The callback failed */ | |
243 | SSLerr(SSL_F_SSL_GET_NEW_SESSION, | |
244 | SSL_R_SSL_SESSION_ID_CALLBACK_FAILED); | |
245 | SSL_SESSION_free(ss); | |
246 | return (0); | |
247 | } | |
248 | /* | |
249 | * Don't allow the callback to set the session length to zero. nor | |
250 | * set it higher than it was. | |
251 | */ | |
252 | if (!tmp || (tmp > ss->session_id_length)) { | |
253 | /* The callback set an illegal length */ | |
254 | SSLerr(SSL_F_SSL_GET_NEW_SESSION, | |
255 | SSL_R_SSL_SESSION_ID_HAS_BAD_LENGTH); | |
256 | SSL_SESSION_free(ss); | |
257 | return (0); | |
258 | } | |
259 | /* If the session length was shrunk and we're SSLv2, pad it */ | |
260 | if ((tmp < ss->session_id_length) && (s->version == SSL2_VERSION)) | |
261 | memset(ss->session_id + tmp, 0, ss->session_id_length - tmp); | |
262 | else | |
263 | ss->session_id_length = tmp; | |
264 | /* Finally, check for a conflict */ | |
265 | if (SSL_has_matching_session_id(s, ss->session_id, | |
266 | ss->session_id_length)) { | |
267 | SSLerr(SSL_F_SSL_GET_NEW_SESSION, SSL_R_SSL_SESSION_ID_CONFLICT); | |
268 | SSL_SESSION_free(ss); | |
269 | return (0); | |
270 | } | |
865a90eb | 271 | #ifndef OPENSSL_NO_TLSEXT |
40720ce3 MC |
272 | sess_id_done: |
273 | if (s->tlsext_hostname) { | |
274 | ss->tlsext_hostname = BUF_strdup(s->tlsext_hostname); | |
275 | if (ss->tlsext_hostname == NULL) { | |
276 | SSLerr(SSL_F_SSL_GET_NEW_SESSION, ERR_R_INTERNAL_ERROR); | |
277 | SSL_SESSION_free(ss); | |
278 | return 0; | |
279 | } | |
280 | } | |
865a90eb | 281 | #endif |
40720ce3 MC |
282 | } else { |
283 | ss->session_id_length = 0; | |
284 | } | |
285 | ||
286 | if (s->sid_ctx_length > sizeof ss->sid_ctx) { | |
287 | SSLerr(SSL_F_SSL_GET_NEW_SESSION, ERR_R_INTERNAL_ERROR); | |
288 | SSL_SESSION_free(ss); | |
289 | return 0; | |
290 | } | |
291 | memcpy(ss->sid_ctx, s->sid_ctx, s->sid_ctx_length); | |
292 | ss->sid_ctx_length = s->sid_ctx_length; | |
293 | s->session = ss; | |
294 | ss->ssl_version = s->version; | |
295 | ss->verify_result = X509_V_OK; | |
296 | ||
297 | return (1); | |
298 | } | |
d02b48c6 | 299 | |
865a90eb | 300 | int ssl_get_prev_session(SSL *s, unsigned char *session_id, int len, |
40720ce3 MC |
301 | const unsigned char *limit) |
302 | { | |
303 | /* This is used only by servers. */ | |
b56bce4f | 304 | |
40720ce3 MC |
305 | SSL_SESSION *ret = NULL; |
306 | int fatal = 0; | |
865a90eb | 307 | #ifndef OPENSSL_NO_TLSEXT |
40720ce3 | 308 | int r; |
865a90eb | 309 | #endif |
40720ce3 MC |
310 | |
311 | if (len > SSL_MAX_SSL_SESSION_ID_LENGTH) | |
312 | goto err; | |
5d28381a MC |
313 | |
314 | if (session_id + len > limit) { | |
315 | fatal = 1; | |
316 | goto err; | |
317 | } | |
318 | ||
865a90eb | 319 | #ifndef OPENSSL_NO_TLSEXT |
40720ce3 MC |
320 | r = tls1_process_ticket(s, session_id, len, limit, &ret); |
321 | if (r == -1) { | |
322 | fatal = 1; | |
323 | goto err; | |
324 | } else if (r == 0 || (!ret && !len)) | |
325 | goto err; | |
326 | else if (!ret | |
6f1f3c66 | 327 | && !(s->session_ctx->session_cache_mode & |
40720ce3 | 328 | SSL_SESS_CACHE_NO_INTERNAL_LOOKUP)) |
865a90eb | 329 | #else |
40720ce3 MC |
330 | if (len == 0) |
331 | goto err; | |
332 | if (!(s->ctx->session_cache_mode & SSL_SESS_CACHE_NO_INTERNAL_LOOKUP)) | |
865a90eb | 333 | #endif |
40720ce3 MC |
334 | { |
335 | SSL_SESSION data; | |
336 | data.ssl_version = s->version; | |
337 | data.session_id_length = len; | |
338 | if (len == 0) | |
339 | return 0; | |
340 | memcpy(data.session_id, session_id, len); | |
341 | CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX); | |
342 | ret = (SSL_SESSION *)lh_retrieve(s->ctx->sessions, &data); | |
343 | if (ret != NULL) | |
344 | /* don't allow other threads to steal it: */ | |
345 | CRYPTO_add(&ret->references, 1, CRYPTO_LOCK_SSL_SESSION); | |
346 | CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX); | |
347 | } | |
348 | ||
349 | if (ret == NULL) { | |
350 | int copy = 1; | |
351 | ||
352 | s->ctx->stats.sess_miss++; | |
353 | ret = NULL; | |
354 | if (s->ctx->get_session_cb != NULL | |
355 | && (ret = s->ctx->get_session_cb(s, session_id, len, ©)) | |
356 | != NULL) { | |
357 | s->ctx->stats.sess_cb_hit++; | |
358 | ||
359 | /* | |
360 | * Increment reference count now if the session callback asks us | |
361 | * to do so (note that if the session structures returned by the | |
362 | * callback are shared between threads, it must handle the | |
363 | * reference count itself [i.e. copy == 0], or things won't be | |
364 | * thread-safe). | |
365 | */ | |
366 | if (copy) | |
367 | CRYPTO_add(&ret->references, 1, CRYPTO_LOCK_SSL_SESSION); | |
368 | ||
369 | /* | |
370 | * Add the externally cached session to the internal cache as | |
371 | * well if and only if we are supposed to. | |
372 | */ | |
373 | if (! | |
374 | (s-> | |
375 | ctx->session_cache_mode & SSL_SESS_CACHE_NO_INTERNAL_STORE)) | |
376 | /* | |
377 | * The following should not return 1, otherwise, things are | |
378 | * very strange | |
379 | */ | |
380 | SSL_CTX_add_session(s->ctx, ret); | |
381 | } | |
382 | if (ret == NULL) | |
383 | goto err; | |
384 | } | |
385 | ||
386 | /* Now ret is non-NULL, and we own one of its reference counts. */ | |
387 | ||
388 | if (ret->sid_ctx_length != s->sid_ctx_length | |
389 | || memcmp(ret->sid_ctx, s->sid_ctx, ret->sid_ctx_length)) { | |
390 | /* | |
391 | * We've found the session named by the client, but we don't want to | |
392 | * use it in this context. | |
393 | */ | |
394 | ||
395 | #if 0 /* The client cannot always know when a | |
396 | * session is not appropriate, so we | |
397 | * shouldn't generate an error message. */ | |
398 | ||
399 | SSLerr(SSL_F_SSL_GET_PREV_SESSION, | |
400 | SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT); | |
8876bc05 | 401 | #endif |
40720ce3 MC |
402 | goto err; /* treat like cache miss */ |
403 | } | |
404 | ||
405 | if ((s->verify_mode & SSL_VERIFY_PEER) && s->sid_ctx_length == 0) { | |
406 | /* | |
407 | * We can't be sure if this session is being used out of context, | |
408 | * which is especially important for SSL_VERIFY_PEER. The application | |
409 | * should have used SSL[_CTX]_set_session_id_context. For this error | |
410 | * case, we generate an error instead of treating the event like a | |
411 | * cache miss (otherwise it would be easy for applications to | |
412 | * effectively disable the session cache by accident without anyone | |
413 | * noticing). | |
414 | */ | |
415 | ||
416 | SSLerr(SSL_F_SSL_GET_PREV_SESSION, | |
417 | SSL_R_SESSION_ID_CONTEXT_UNINITIALIZED); | |
418 | fatal = 1; | |
419 | goto err; | |
420 | } | |
421 | ||
422 | if (ret->cipher == NULL) { | |
423 | unsigned char buf[5], *p; | |
424 | unsigned long l; | |
425 | ||
426 | p = buf; | |
427 | l = ret->cipher_id; | |
428 | l2n(l, p); | |
429 | if ((ret->ssl_version >> 8) >= SSL3_VERSION_MAJOR) | |
430 | ret->cipher = ssl_get_cipher_by_char(s, &(buf[2])); | |
431 | else | |
432 | ret->cipher = ssl_get_cipher_by_char(s, &(buf[1])); | |
433 | if (ret->cipher == NULL) | |
434 | goto err; | |
435 | } | |
436 | #if 0 /* This is way too late. */ | |
437 | ||
438 | /* | |
439 | * If a thread got the session, then 'swaped', and another got it and | |
440 | * then due to a time-out decided to 'OPENSSL_free' it we could be in | |
441 | * trouble. So I'll increment it now, then double decrement later - am I | |
442 | * speaking rubbish?. | |
443 | */ | |
444 | CRYPTO_add(&ret->references, 1, CRYPTO_LOCK_SSL_SESSION); | |
8876bc05 | 445 | #endif |
d02b48c6 | 446 | |
40720ce3 MC |
447 | if (ret->timeout < (long)(time(NULL) - ret->time)) { /* timeout */ |
448 | s->ctx->stats.sess_timeout++; | |
449 | /* remove it from the cache */ | |
450 | SSL_CTX_remove_session(s->ctx, ret); | |
451 | goto err; | |
452 | } | |
453 | ||
454 | s->ctx->stats.sess_hit++; | |
455 | ||
456 | /*- ret->time=time(NULL); *//* | |
457 | * rezero timeout? | |
458 | */ | |
459 | /* | |
460 | * again, just leave the session if it is the same session, we have just | |
461 | * incremented and then decremented the reference count :-) | |
462 | */ | |
463 | if (s->session != NULL) | |
464 | SSL_SESSION_free(s->session); | |
465 | s->session = ret; | |
466 | s->verify_result = s->session->verify_result; | |
467 | return (1); | |
8876bc05 BM |
468 | |
469 | err: | |
40720ce3 MC |
470 | if (ret != NULL) |
471 | SSL_SESSION_free(ret); | |
472 | if (fatal) | |
473 | return -1; | |
474 | else | |
475 | return 0; | |
476 | } | |
d02b48c6 | 477 | |
6b691a5c | 478 | int SSL_CTX_add_session(SSL_CTX *ctx, SSL_SESSION *c) |
40720ce3 MC |
479 | { |
480 | int ret = 0; | |
481 | SSL_SESSION *s; | |
482 | ||
483 | /* | |
484 | * add just 1 reference count for the SSL_CTX's session cache even though | |
485 | * it has two ways of access: each session is in a doubly linked list and | |
486 | * an lhash | |
487 | */ | |
488 | CRYPTO_add(&c->references, 1, CRYPTO_LOCK_SSL_SESSION); | |
489 | /* | |
490 | * if session c is in already in cache, we take back the increment later | |
491 | */ | |
492 | ||
493 | CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX); | |
494 | s = (SSL_SESSION *)lh_insert(ctx->sessions, c); | |
495 | ||
496 | /* | |
497 | * s != NULL iff we already had a session with the given PID. In this | |
498 | * case, s == c should hold (then we did not really modify | |
499 | * ctx->sessions), or we're in trouble. | |
500 | */ | |
501 | if (s != NULL && s != c) { | |
502 | /* We *are* in trouble ... */ | |
503 | SSL_SESSION_list_remove(ctx, s); | |
504 | SSL_SESSION_free(s); | |
505 | /* | |
506 | * ... so pretend the other session did not exist in cache (we cannot | |
507 | * handle two SSL_SESSION structures with identical session ID in the | |
508 | * same cache, which could happen e.g. when two threads concurrently | |
509 | * obtain the same session from an external cache) | |
510 | */ | |
511 | s = NULL; | |
512 | } | |
513 | ||
514 | /* Put at the head of the queue unless it is already in the cache */ | |
515 | if (s == NULL) | |
516 | SSL_SESSION_list_add(ctx, c); | |
517 | ||
518 | if (s != NULL) { | |
519 | /* | |
520 | * existing cache entry -- decrement previously incremented reference | |
521 | * count because it already takes into account the cache | |
522 | */ | |
523 | ||
524 | SSL_SESSION_free(s); /* s == c */ | |
525 | ret = 0; | |
526 | } else { | |
527 | /* | |
528 | * new cache entry -- remove old ones if cache has become too large | |
529 | */ | |
530 | ||
531 | ret = 1; | |
532 | ||
533 | if (SSL_CTX_sess_get_cache_size(ctx) > 0) { | |
534 | while (SSL_CTX_sess_number(ctx) > | |
535 | SSL_CTX_sess_get_cache_size(ctx)) { | |
536 | if (!remove_session_lock(ctx, ctx->session_cache_tail, 0)) | |
537 | break; | |
538 | else | |
539 | ctx->stats.sess_cache_full++; | |
540 | } | |
541 | } | |
542 | } | |
543 | CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX); | |
544 | return (ret); | |
545 | } | |
d02b48c6 | 546 | |
6b691a5c | 547 | int SSL_CTX_remove_session(SSL_CTX *ctx, SSL_SESSION *c) |
801294f8 | 548 | { |
40720ce3 | 549 | return remove_session_lock(ctx, c, 1); |
801294f8 DSH |
550 | } |
551 | ||
0fda2e37 | 552 | static int remove_session_lock(SSL_CTX *ctx, SSL_SESSION *c, int lck) |
40720ce3 MC |
553 | { |
554 | SSL_SESSION *r; | |
555 | int ret = 0; | |
556 | ||
557 | if ((c != NULL) && (c->session_id_length != 0)) { | |
558 | if (lck) | |
559 | CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX); | |
560 | if ((r = (SSL_SESSION *)lh_retrieve(ctx->sessions, c)) == c) { | |
561 | ret = 1; | |
562 | r = (SSL_SESSION *)lh_delete(ctx->sessions, c); | |
563 | SSL_SESSION_list_remove(ctx, c); | |
564 | } | |
565 | ||
566 | if (lck) | |
567 | CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX); | |
568 | ||
569 | if (ret) { | |
570 | r->not_resumable = 1; | |
571 | if (ctx->remove_session_cb != NULL) | |
572 | ctx->remove_session_cb(ctx, r); | |
573 | SSL_SESSION_free(r); | |
574 | } | |
575 | } else | |
576 | ret = 0; | |
577 | return (ret); | |
578 | } | |
d02b48c6 | 579 | |
6b691a5c | 580 | void SSL_SESSION_free(SSL_SESSION *ss) |
40720ce3 MC |
581 | { |
582 | int i; | |
d02b48c6 | 583 | |
40720ce3 MC |
584 | if (ss == NULL) |
585 | return; | |
e03ddfae | 586 | |
40720ce3 | 587 | i = CRYPTO_add(&ss->references, -1, CRYPTO_LOCK_SSL_SESSION); |
58964a49 | 588 | #ifdef REF_PRINT |
40720ce3 | 589 | REF_PRINT("SSL_SESSION", ss); |
58964a49 | 590 | #endif |
40720ce3 MC |
591 | if (i > 0) |
592 | return; | |
d02b48c6 | 593 | #ifdef REF_CHECK |
40720ce3 MC |
594 | if (i < 0) { |
595 | fprintf(stderr, "SSL_SESSION_free, bad reference count\n"); | |
596 | abort(); /* ok */ | |
597 | } | |
d02b48c6 RE |
598 | #endif |
599 | ||
40720ce3 MC |
600 | CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_SESSION, ss, &ss->ex_data); |
601 | ||
602 | OPENSSL_cleanse(ss->key_arg, sizeof ss->key_arg); | |
603 | OPENSSL_cleanse(ss->master_key, sizeof ss->master_key); | |
604 | OPENSSL_cleanse(ss->session_id, sizeof ss->session_id); | |
605 | if (ss->sess_cert != NULL) | |
606 | ssl_sess_cert_free(ss->sess_cert); | |
607 | if (ss->peer != NULL) | |
608 | X509_free(ss->peer); | |
609 | if (ss->ciphers != NULL) | |
610 | sk_SSL_CIPHER_free(ss->ciphers); | |
865a90eb | 611 | #ifndef OPENSSL_NO_TLSEXT |
40720ce3 MC |
612 | if (ss->tlsext_hostname != NULL) |
613 | OPENSSL_free(ss->tlsext_hostname); | |
614 | if (ss->tlsext_tick != NULL) | |
615 | OPENSSL_free(ss->tlsext_tick); | |
865a90eb | 616 | #endif |
40720ce3 MC |
617 | OPENSSL_cleanse(ss, sizeof(*ss)); |
618 | OPENSSL_free(ss); | |
619 | } | |
d02b48c6 | 620 | |
6b691a5c | 621 | int SSL_set_session(SSL *s, SSL_SESSION *session) |
40720ce3 MC |
622 | { |
623 | int ret = 0; | |
624 | SSL_METHOD *meth; | |
625 | ||
626 | if (session != NULL) { | |
627 | meth = s->ctx->method->get_ssl_method(session->ssl_version); | |
628 | if (meth == NULL) | |
629 | meth = s->method->get_ssl_method(session->ssl_version); | |
630 | if (meth == NULL) { | |
631 | SSLerr(SSL_F_SSL_SET_SESSION, SSL_R_UNABLE_TO_FIND_SSL_METHOD); | |
632 | return (0); | |
633 | } | |
634 | ||
635 | if (meth != s->method) { | |
636 | if (!SSL_set_ssl_method(s, meth)) | |
637 | return (0); | |
638 | if (s->ctx->session_timeout == 0) | |
639 | session->timeout = SSL_get_default_timeout(s); | |
640 | else | |
641 | session->timeout = s->ctx->session_timeout; | |
642 | } | |
882e8912 | 643 | #ifndef OPENSSL_NO_KRB5 |
40720ce3 MC |
644 | if (s->kssl_ctx && !s->kssl_ctx->client_princ && |
645 | session->krb5_client_princ_len > 0) { | |
646 | s->kssl_ctx->client_princ = | |
647 | (char *)OPENSSL_malloc(session->krb5_client_princ_len + 1); | |
648 | memcpy(s->kssl_ctx->client_princ, session->krb5_client_princ, | |
649 | session->krb5_client_princ_len); | |
650 | s->kssl_ctx->client_princ[session->krb5_client_princ_len] = '\0'; | |
651 | } | |
652 | #endif /* OPENSSL_NO_KRB5 */ | |
653 | ||
654 | /* CRYPTO_w_lock(CRYPTO_LOCK_SSL); */ | |
655 | CRYPTO_add(&session->references, 1, CRYPTO_LOCK_SSL_SESSION); | |
656 | if (s->session != NULL) | |
657 | SSL_SESSION_free(s->session); | |
658 | s->session = session; | |
659 | s->verify_result = s->session->verify_result; | |
660 | /* CRYPTO_w_unlock(CRYPTO_LOCK_SSL); */ | |
661 | ret = 1; | |
662 | } else { | |
663 | if (s->session != NULL) { | |
664 | SSL_SESSION_free(s->session); | |
665 | s->session = NULL; | |
666 | } | |
667 | ||
668 | meth = s->ctx->method; | |
669 | if (meth != s->method) { | |
670 | if (!SSL_set_ssl_method(s, meth)) | |
671 | return (0); | |
672 | } | |
673 | ret = 1; | |
674 | } | |
675 | return (ret); | |
676 | } | |
d02b48c6 | 677 | |
6b691a5c | 678 | long SSL_SESSION_set_timeout(SSL_SESSION *s, long t) |
40720ce3 MC |
679 | { |
680 | if (s == NULL) | |
681 | return (0); | |
682 | s->timeout = t; | |
683 | return (1); | |
684 | } | |
d02b48c6 | 685 | |
0821bcd4 | 686 | long SSL_SESSION_get_timeout(const SSL_SESSION *s) |
40720ce3 MC |
687 | { |
688 | if (s == NULL) | |
689 | return (0); | |
690 | return (s->timeout); | |
691 | } | |
d02b48c6 | 692 | |
0821bcd4 | 693 | long SSL_SESSION_get_time(const SSL_SESSION *s) |
40720ce3 MC |
694 | { |
695 | if (s == NULL) | |
696 | return (0); | |
697 | return (s->time); | |
698 | } | |
d02b48c6 | 699 | |
6b691a5c | 700 | long SSL_SESSION_set_time(SSL_SESSION *s, long t) |
40720ce3 MC |
701 | { |
702 | if (s == NULL) | |
703 | return (0); | |
704 | s->time = t; | |
705 | return (t); | |
706 | } | |
d02b48c6 | 707 | |
6b691a5c | 708 | long SSL_CTX_set_timeout(SSL_CTX *s, long t) |
40720ce3 MC |
709 | { |
710 | long l; | |
711 | if (s == NULL) | |
712 | return (0); | |
713 | l = s->session_timeout; | |
714 | s->session_timeout = t; | |
715 | return (l); | |
716 | } | |
413c4f45 | 717 | |
0821bcd4 | 718 | long SSL_CTX_get_timeout(const SSL_CTX *s) |
40720ce3 MC |
719 | { |
720 | if (s == NULL) | |
721 | return (0); | |
722 | return (s->session_timeout); | |
723 | } | |
724 | ||
725 | typedef struct timeout_param_st { | |
726 | SSL_CTX *ctx; | |
727 | long time; | |
728 | LHASH *cache; | |
729 | } TIMEOUT_PARAM; | |
d02b48c6 | 730 | |
6b691a5c | 731 | static void timeout(SSL_SESSION *s, TIMEOUT_PARAM *p) |
40720ce3 MC |
732 | { |
733 | if ((p->time == 0) || (p->time > (s->time + s->timeout))) { /* timeout */ | |
734 | /* | |
735 | * The reason we don't call SSL_CTX_remove_session() is to save on | |
736 | * locking overhead | |
737 | */ | |
738 | lh_delete(p->cache, s); | |
739 | SSL_SESSION_list_remove(p->ctx, s); | |
740 | s->not_resumable = 1; | |
741 | if (p->ctx->remove_session_cb != NULL) | |
742 | p->ctx->remove_session_cb(p->ctx, s); | |
743 | SSL_SESSION_free(s); | |
744 | } | |
745 | } | |
d02b48c6 | 746 | |
3c914840 GT |
747 | static IMPLEMENT_LHASH_DOALL_ARG_FN(timeout, SSL_SESSION *, TIMEOUT_PARAM *) |
748 | ||
6b691a5c | 749 | void SSL_CTX_flush_sessions(SSL_CTX *s, long t) |
40720ce3 MC |
750 | { |
751 | unsigned long i; | |
752 | TIMEOUT_PARAM tp; | |
753 | ||
754 | tp.ctx = s; | |
755 | tp.cache = s->sessions; | |
756 | if (tp.cache == NULL) | |
757 | return; | |
758 | tp.time = t; | |
759 | CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX); | |
760 | i = tp.cache->down_load; | |
761 | tp.cache->down_load = 0; | |
762 | lh_doall_arg(tp.cache, LHASH_DOALL_ARG_FN(timeout), &tp); | |
763 | tp.cache->down_load = i; | |
764 | CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX); | |
765 | } | |
d02b48c6 | 766 | |
6b691a5c | 767 | int ssl_clear_bad_session(SSL *s) |
40720ce3 MC |
768 | { |
769 | if ((s->session != NULL) && | |
770 | !(s->shutdown & SSL_SENT_SHUTDOWN) && | |
771 | !(SSL_in_init(s) || SSL_in_before(s))) { | |
772 | SSL_CTX_remove_session(s->ctx, s->session); | |
773 | return (1); | |
774 | } else | |
775 | return (0); | |
776 | } | |
58964a49 RE |
777 | |
778 | /* locked by SSL_CTX in the calling function */ | |
6b691a5c | 779 | static void SSL_SESSION_list_remove(SSL_CTX *ctx, SSL_SESSION *s) |
40720ce3 MC |
780 | { |
781 | if ((s->next == NULL) || (s->prev == NULL)) | |
782 | return; | |
783 | ||
784 | if (s->next == (SSL_SESSION *)&(ctx->session_cache_tail)) { | |
785 | /* last element in list */ | |
786 | if (s->prev == (SSL_SESSION *)&(ctx->session_cache_head)) { | |
787 | /* only one element in list */ | |
788 | ctx->session_cache_head = NULL; | |
789 | ctx->session_cache_tail = NULL; | |
790 | } else { | |
791 | ctx->session_cache_tail = s->prev; | |
792 | s->prev->next = (SSL_SESSION *)&(ctx->session_cache_tail); | |
793 | } | |
794 | } else { | |
795 | if (s->prev == (SSL_SESSION *)&(ctx->session_cache_head)) { | |
796 | /* first element in list */ | |
797 | ctx->session_cache_head = s->next; | |
798 | s->next->prev = (SSL_SESSION *)&(ctx->session_cache_head); | |
799 | } else { | |
800 | /* middle of list */ | |
801 | s->next->prev = s->prev; | |
802 | s->prev->next = s->next; | |
803 | } | |
804 | } | |
805 | s->prev = s->next = NULL; | |
806 | } | |
58964a49 | 807 | |
6b691a5c | 808 | static void SSL_SESSION_list_add(SSL_CTX *ctx, SSL_SESSION *s) |
40720ce3 MC |
809 | { |
810 | if ((s->next != NULL) && (s->prev != NULL)) | |
811 | SSL_SESSION_list_remove(ctx, s); | |
812 | ||
813 | if (ctx->session_cache_head == NULL) { | |
814 | ctx->session_cache_head = s; | |
815 | ctx->session_cache_tail = s; | |
816 | s->prev = (SSL_SESSION *)&(ctx->session_cache_head); | |
817 | s->next = (SSL_SESSION *)&(ctx->session_cache_tail); | |
818 | } else { | |
819 | s->next = ctx->session_cache_head; | |
820 | s->next->prev = s; | |
821 | s->prev = (SSL_SESSION *)&(ctx->session_cache_head); | |
822 | ctx->session_cache_head = s; | |
823 | } | |
824 | } | |
58964a49 | 825 | |
d4a62400 | 826 | void SSL_CTX_sess_set_new_cb(SSL_CTX *ctx, |
40720ce3 MC |
827 | int (*cb) (struct ssl_st *ssl, |
828 | SSL_SESSION *sess)) | |
829 | { | |
830 | ctx->new_session_cb = cb; | |
831 | } | |
d4a62400 | 832 | |
40720ce3 MC |
833 | int (*SSL_CTX_sess_get_new_cb(SSL_CTX *ctx)) (SSL *ssl, SSL_SESSION *sess) { |
834 | return ctx->new_session_cb; | |
835 | } | |
d4a62400 NL |
836 | |
837 | void SSL_CTX_sess_set_remove_cb(SSL_CTX *ctx, | |
40720ce3 MC |
838 | void (*cb) (SSL_CTX *ctx, SSL_SESSION *sess)) |
839 | { | |
840 | ctx->remove_session_cb = cb; | |
841 | } | |
d4a62400 | 842 | |
40720ce3 MC |
843 | void (*SSL_CTX_sess_get_remove_cb(SSL_CTX *ctx)) (SSL_CTX *ctx, |
844 | SSL_SESSION *sess) { | |
845 | return ctx->remove_session_cb; | |
846 | } | |
d4a62400 NL |
847 | |
848 | void SSL_CTX_sess_set_get_cb(SSL_CTX *ctx, | |
40720ce3 MC |
849 | SSL_SESSION *(*cb) (struct ssl_st *ssl, |
850 | unsigned char *data, int len, | |
851 | int *copy)) | |
852 | { | |
853 | ctx->get_session_cb = cb; | |
854 | } | |
855 | ||
856 | SSL_SESSION *(*SSL_CTX_sess_get_get_cb(SSL_CTX *ctx)) (SSL *ssl, | |
857 | unsigned char *data, | |
858 | int len, int *copy) { | |
859 | return ctx->get_session_cb; | |
860 | } | |
861 | ||
862 | void SSL_CTX_set_info_callback(SSL_CTX *ctx, | |
863 | void (*cb) (const SSL *ssl, int type, int val)) | |
864 | { | |
865 | ctx->info_callback = cb; | |
866 | } | |
867 | ||
868 | void (*SSL_CTX_get_info_callback(SSL_CTX *ctx)) (const SSL *ssl, int type, | |
869 | int val) { | |
870 | return ctx->info_callback; | |
871 | } | |
d4a62400 NL |
872 | |
873 | void SSL_CTX_set_client_cert_cb(SSL_CTX *ctx, | |
40720ce3 MC |
874 | int (*cb) (SSL *ssl, X509 **x509, |
875 | EVP_PKEY **pkey)) | |
876 | { | |
877 | ctx->client_cert_cb = cb; | |
878 | } | |
d4a62400 | 879 | |
40720ce3 MC |
880 | int (*SSL_CTX_get_client_cert_cb(SSL_CTX *ctx)) (SSL *ssl, X509 **x509, |
881 | EVP_PKEY **pkey) { | |
882 | return ctx->client_cert_cb; | |
883 | } | |
d4a62400 | 884 | |
4aefb1dd DSH |
885 | #ifndef OPENSSL_NO_ENGINE |
886 | int SSL_CTX_set_client_cert_engine(SSL_CTX *ctx, ENGINE *e) | |
40720ce3 MC |
887 | { |
888 | if (!ENGINE_init(e)) { | |
889 | SSLerr(SSL_F_SSL_CTX_SET_CLIENT_CERT_ENGINE, ERR_R_ENGINE_LIB); | |
890 | return 0; | |
891 | } | |
892 | if (!ENGINE_get_ssl_client_cert_function(e)) { | |
893 | SSLerr(SSL_F_SSL_CTX_SET_CLIENT_CERT_ENGINE, | |
894 | SSL_R_NO_CLIENT_CERT_METHOD); | |
895 | ENGINE_finish(e); | |
896 | return 0; | |
897 | } | |
898 | ctx->client_cert_engine = e; | |
899 | return 1; | |
900 | } | |
4aefb1dd DSH |
901 | #endif |
902 | ||
d4a62400 | 903 | void SSL_CTX_set_cookie_generate_cb(SSL_CTX *ctx, |
40720ce3 MC |
904 | int (*cb) (SSL *ssl, |
905 | unsigned char *cookie, | |
906 | unsigned int *cookie_len)) | |
907 | { | |
908 | ctx->app_gen_cookie_cb = cb; | |
909 | } | |
d4a62400 NL |
910 | |
911 | void SSL_CTX_set_cookie_verify_cb(SSL_CTX *ctx, | |
40720ce3 MC |
912 | int (*cb) (SSL *ssl, unsigned char *cookie, |
913 | unsigned int cookie_len)) | |
914 | { | |
915 | ctx->app_verify_cookie_cb = cb; | |
916 | } |