summaryrefslogtreecommitdiff
path: root/src/lib/libssl/ssl_sess.c
diff options
context:
space:
mode:
authorcvs2svn <admin@example.com>2015-03-08 16:48:49 +0000
committercvs2svn <admin@example.com>2015-03-08 16:48:49 +0000
commitdecf84ba5550c1656a7fdb51b5b81969590c3f03 (patch)
tree44872802e872bdfd60730fa9cf01d9d5751251c1 /src/lib/libssl/ssl_sess.c
parent7a8f138352aa4eb7b65ac4b1a5fe7630fbee1427 (diff)
downloadopenbsd-libressl-v2.1.5.tar.gz
openbsd-libressl-v2.1.5.tar.bz2
openbsd-libressl-v2.1.5.zip
This commit was manufactured by cvs2git to create branch 'OPENBSD_5_7'.libressl-v2.1.5
Diffstat (limited to 'src/lib/libssl/ssl_sess.c')
-rw-r--r--src/lib/libssl/ssl_sess.c1104
1 files changed, 0 insertions, 1104 deletions
diff --git a/src/lib/libssl/ssl_sess.c b/src/lib/libssl/ssl_sess.c
deleted file mode 100644
index 80b883f786..0000000000
--- a/src/lib/libssl/ssl_sess.c
+++ /dev/null
@@ -1,1104 +0,0 @@
1/* $OpenBSD: ssl_sess.c,v 1.44 2014/12/14 15:30:50 jsing Exp $ */
2/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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.
8 *
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).
15 *
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.
22 *
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 :-).
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)"
40 *
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.
52 *
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 * Copyright (c) 1998-2006 The OpenSSL Project. All rights reserved.
60 *
61 * Redistribution and use in source and binary forms, with or without
62 * modification, are permitted provided that the following conditions
63 * are met:
64 *
65 * 1. Redistributions of source code must retain the above copyright
66 * notice, this list of conditions and the following disclaimer.
67 *
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
71 * distribution.
72 *
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/)"
77 *
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.
82 *
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.
86 *
87 * 6. Redistributions of any form whatsoever must retain the following
88 * acknowledgment:
89 * "This product includes software developed by the OpenSSL Project
90 * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
91 *
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 * ====================================================================
105 *
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).
109 *
110 */
111/* ====================================================================
112 * Copyright 2005 Nokia. All rights reserved.
113 *
114 * The portions of the attached software ("Contribution") is developed by
115 * Nokia Corporation and is licensed pursuant to the OpenSSL open source
116 * license.
117 *
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.
121 *
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.
125 *
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.
130 *
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
135 * OTHERWISE.
136 */
137
138#include <openssl/lhash.h>
139
140#ifndef OPENSSL_NO_ENGINE
141#include <openssl/engine.h>
142#endif
143
144#include "ssl_locl.h"
145
146static void SSL_SESSION_list_remove(SSL_CTX *ctx, SSL_SESSION *s);
147static void SSL_SESSION_list_add(SSL_CTX *ctx, SSL_SESSION *s);
148static int remove_session_lock(SSL_CTX *ctx, SSL_SESSION *c, int lck);
149
150/* aka SSL_get0_session; gets 0 objects, just returns a copy of the pointer */
151SSL_SESSION *
152SSL_get_session(const SSL *ssl)
153{
154 return (ssl->session);
155}
156
157/* variant of SSL_get_session: caller really gets something */
158SSL_SESSION *
159SSL_get1_session(SSL *ssl)
160{
161 SSL_SESSION *sess;
162
163 /*
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.
167 */
168 CRYPTO_w_lock(CRYPTO_LOCK_SSL_SESSION);
169 sess = ssl->session;
170 if (sess)
171 sess->references++;
172 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_SESSION);
173
174 return (sess);
175}
176
177int
178SSL_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)
180{
181 return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL_SESSION,
182 argl, argp, new_func, dup_func, free_func);
183}
184
185int
186SSL_SESSION_set_ex_data(SSL_SESSION *s, int idx, void *arg)
187{
188 return (CRYPTO_set_ex_data(&s->ex_data, idx, arg));
189}
190
191void *
192SSL_SESSION_get_ex_data(const SSL_SESSION *s, int idx)
193{
194 return (CRYPTO_get_ex_data(&s->ex_data, idx));
195}
196
197SSL_SESSION *
198SSL_SESSION_new(void)
199{
200 SSL_SESSION *ss;
201
202 ss = calloc(1, sizeof(SSL_SESSION));
203 if (ss == NULL) {
204 SSLerr(SSL_F_SSL_SESSION_NEW, ERR_R_MALLOC_FAILURE);
205 return (0);
206 }
207
208 ss->verify_result = 1; /* avoid 0 (= X509_V_OK) just in case */
209 ss->references = 1;
210 ss->timeout=60*5+4; /* 5 minute timeout by default */
211 ss->time = time(NULL);
212 ss->prev = NULL;
213 ss->next = NULL;
214 ss->tlsext_hostname = NULL;
215
216 ss->tlsext_ecpointformatlist_length = 0;
217 ss->tlsext_ecpointformatlist = NULL;
218 ss->tlsext_ellipticcurvelist_length = 0;
219 ss->tlsext_ellipticcurvelist = NULL;
220
221 CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_SESSION, ss, &ss->ex_data);
222
223 return (ss);
224}
225
226const unsigned char *
227SSL_SESSION_get_id(const SSL_SESSION *s, unsigned int *len)
228{
229 if (len)
230 *len = s->session_id_length;
231 return s->session_id;
232}
233
234unsigned int
235SSL_SESSION_get_compress_id(const SSL_SESSION *s)
236{
237 return 0;
238}
239
240/*
241 * SSLv3/TLSv1 has 32 bytes (256 bits) of session ID space. As such, filling
242 * the ID with random gunk repeatedly until we have no conflict is going to
243 * complete in one iteration pretty much "most" of the time (btw:
244 * understatement). So, if it takes us 10 iterations and we still can't avoid
245 * a conflict - well that's a reasonable point to call it quits. Either the
246 * arc4random code is broken or someone is trying to open roughly very close to
247 * 2^128 (or 2^256) SSL sessions to our server. How you might store that many
248 * sessions is perhaps a more interesting question...
249 */
250
251#define MAX_SESS_ID_ATTEMPTS 10
252
253static int
254def_generate_session_id(const SSL *ssl, unsigned char *id, unsigned int *id_len)
255{
256 unsigned int retry = 0;
257
258 do {
259 arc4random_buf(id, *id_len);
260 } while (SSL_has_matching_session_id(ssl, id, *id_len) &&
261 (++retry < MAX_SESS_ID_ATTEMPTS));
262
263 if (retry < MAX_SESS_ID_ATTEMPTS)
264 return 1;
265
266 /* else - woops a session_id match */
267 /* XXX We should also check the external cache --
268 * but the probability of a collision is negligible, and
269 * we could not prevent the concurrent creation of sessions
270 * with identical IDs since we currently don't have means
271 * to atomically check whether a session ID already exists
272 * and make a reservation for it if it does not
273 * (this problem applies to the internal cache as well).
274 */
275 return 0;
276}
277
278int
279ssl_get_new_session(SSL *s, int session)
280{
281 unsigned int tmp;
282 SSL_SESSION *ss = NULL;
283 GEN_SESSION_CB cb = def_generate_session_id;
284
285 /* This gets used by clients and servers. */
286
287 if ((ss = SSL_SESSION_new()) == NULL)
288 return (0);
289
290 /* If the context has a default timeout, use it */
291 if (s->session_ctx->session_timeout == 0)
292 ss->timeout = SSL_get_default_timeout(s);
293 else
294 ss->timeout = s->session_ctx->session_timeout;
295
296 if (s->session != NULL) {
297 SSL_SESSION_free(s->session);
298 s->session = NULL;
299 }
300
301 if (session) {
302 switch (s->version) {
303 case SSL3_VERSION:
304 case TLS1_VERSION:
305 case TLS1_1_VERSION:
306 case TLS1_2_VERSION:
307 case DTLS1_BAD_VER:
308 case DTLS1_VERSION:
309 ss->ssl_version = s->version;
310 ss->session_id_length = SSL3_SSL_SESSION_ID_LENGTH;
311 break;
312 default:
313 SSLerr(SSL_F_SSL_GET_NEW_SESSION,
314 SSL_R_UNSUPPORTED_SSL_VERSION);
315 SSL_SESSION_free(ss);
316 return (0);
317 }
318
319 /* If RFC4507 ticket use empty session ID. */
320 if (s->tlsext_ticket_expected) {
321 ss->session_id_length = 0;
322 goto sess_id_done;
323 }
324
325 /* Choose which callback will set the session ID. */
326 CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);
327 if (s->generate_session_id)
328 cb = s->generate_session_id;
329 else if (s->session_ctx->generate_session_id)
330 cb = s->session_ctx->generate_session_id;
331 CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
332
333 /* Choose a session ID. */
334 tmp = ss->session_id_length;
335 if (!cb(s, ss->session_id, &tmp)) {
336 /* The callback failed */
337 SSLerr(SSL_F_SSL_GET_NEW_SESSION,
338 SSL_R_SSL_SESSION_ID_CALLBACK_FAILED);
339 SSL_SESSION_free(ss);
340 return (0);
341 }
342
343 /*
344 * Don't allow the callback to set the session length to zero.
345 * nor set it higher than it was.
346 */
347 if (!tmp || (tmp > ss->session_id_length)) {
348 /* The callback set an illegal length */
349 SSLerr(SSL_F_SSL_GET_NEW_SESSION,
350 SSL_R_SSL_SESSION_ID_HAS_BAD_LENGTH);
351 SSL_SESSION_free(ss);
352 return (0);
353 }
354 ss->session_id_length = tmp;
355
356 /* Finally, check for a conflict. */
357 if (SSL_has_matching_session_id(s, ss->session_id,
358 ss->session_id_length)) {
359 SSLerr(SSL_F_SSL_GET_NEW_SESSION,
360 SSL_R_SSL_SESSION_ID_CONFLICT);
361 SSL_SESSION_free(ss);
362 return (0);
363 }
364
365sess_id_done:
366 if (s->tlsext_hostname) {
367 ss->tlsext_hostname = strdup(s->tlsext_hostname);
368 if (ss->tlsext_hostname == NULL) {
369 SSLerr(SSL_F_SSL_GET_NEW_SESSION,
370 ERR_R_INTERNAL_ERROR);
371 SSL_SESSION_free(ss);
372 return 0;
373 }
374 }
375 } else {
376 ss->session_id_length = 0;
377 }
378
379 if (s->sid_ctx_length > sizeof ss->sid_ctx) {
380 SSLerr(SSL_F_SSL_GET_NEW_SESSION, ERR_R_INTERNAL_ERROR);
381 SSL_SESSION_free(ss);
382 return 0;
383 }
384
385 memcpy(ss->sid_ctx, s->sid_ctx, s->sid_ctx_length);
386 ss->sid_ctx_length = s->sid_ctx_length;
387 s->session = ss;
388 ss->ssl_version = s->version;
389 ss->verify_result = X509_V_OK;
390
391 return (1);
392}
393
394/*
395 * ssl_get_prev attempts to find an SSL_SESSION to be used to resume this
396 * connection. It is only called by servers.
397 *
398 * session_id: points at the session ID in the ClientHello. This code will
399 * read past the end of this in order to parse out the session ticket
400 * extension, if any.
401 * len: the length of the session ID.
402 * limit: a pointer to the first byte after the ClientHello.
403 *
404 * Returns:
405 * -1: error
406 * 0: a session may have been found.
407 *
408 * Side effects:
409 * - If a session is found then s->session is pointed at it (after freeing
410 * an existing session if need be) and s->verify_result is set from the
411 * session.
412 * - Both for new and resumed sessions, s->tlsext_ticket_expected is set
413 * to 1 if the server should issue a new session ticket (to 0 otherwise).
414 */
415int
416ssl_get_prev_session(SSL *s, unsigned char *session_id, int len,
417 const unsigned char *limit)
418{
419 SSL_SESSION *ret = NULL;
420 int fatal = 0;
421 int try_session_cache = 1;
422 int r;
423
424 /* This is used only by servers. */
425
426 if (len > SSL_MAX_SSL_SESSION_ID_LENGTH)
427 goto err;
428
429 if (len == 0)
430 try_session_cache = 0;
431
432 /* Sets s->tlsext_ticket_expected. */
433 r = tls1_process_ticket(s, session_id, len, limit, &ret);
434 switch (r) {
435 case -1: /* Error during processing */
436 fatal = 1;
437 goto err;
438 case 0: /* No ticket found */
439 case 1: /* Zero length ticket found */
440 break; /* Ok to carry on processing session id. */
441 case 2: /* Ticket found but not decrypted. */
442 case 3: /* Ticket decrypted, *ret has been set. */
443 try_session_cache = 0;
444 break;
445 default:
446 abort();
447 }
448
449 if (try_session_cache && ret == NULL &&
450 !(s->session_ctx->session_cache_mode &
451 SSL_SESS_CACHE_NO_INTERNAL_LOOKUP)) {
452 SSL_SESSION data;
453 data.ssl_version = s->version;
454 data.session_id_length = len;
455 if (len == 0)
456 return 0;
457 memcpy(data.session_id, session_id, len);
458
459 CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);
460 ret = lh_SSL_SESSION_retrieve(s->session_ctx->sessions, &data);
461 if (ret != NULL) {
462 /* Don't allow other threads to steal it. */
463 CRYPTO_add(&ret->references, 1,
464 CRYPTO_LOCK_SSL_SESSION);
465 }
466 CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
467
468 if (ret == NULL)
469 s->session_ctx->stats.sess_miss++;
470 }
471
472 if (try_session_cache && ret == NULL &&
473 s->session_ctx->get_session_cb != NULL) {
474 int copy = 1;
475
476 if ((ret = s->session_ctx->get_session_cb(s, session_id,
477 len, &copy))) {
478 s->session_ctx->stats.sess_cb_hit++;
479
480 /*
481 * Increment reference count now if the session
482 * callback asks us to do so (note that if the session
483 * structures returned by the callback are shared
484 * between threads, it must handle the reference count
485 * itself [i.e. copy == 0], or things won't be
486 * thread-safe).
487 */
488 if (copy)
489 CRYPTO_add(&ret->references, 1,
490 CRYPTO_LOCK_SSL_SESSION);
491
492 /*
493 * Add the externally cached session to the internal
494 * cache as well if and only if we are supposed to.
495 */
496 if (!(s->session_ctx->session_cache_mode &
497 SSL_SESS_CACHE_NO_INTERNAL_STORE))
498 /*
499 * The following should not return 1,
500 * otherwise, things are very strange.
501 */
502 SSL_CTX_add_session(s->session_ctx, ret);
503 }
504 }
505
506 if (ret == NULL)
507 goto err;
508
509 /* Now ret is non-NULL and we own one of its reference counts. */
510
511 if (ret->sid_ctx_length != s->sid_ctx_length ||
512 timingsafe_memcmp(ret->sid_ctx,
513 s->sid_ctx, ret->sid_ctx_length) != 0) {
514 /* We have the session requested by the client, but we don't
515 * want to use it in this context. */
516 goto err; /* treat like cache miss */
517 }
518
519 if ((s->verify_mode & SSL_VERIFY_PEER) && s->sid_ctx_length == 0) {
520 /*
521 * We can't be sure if this session is being used out of
522 * context, which is especially important for SSL_VERIFY_PEER.
523 * The application should have used
524 * SSL[_CTX]_set_session_id_context.
525 *
526 * For this error case, we generate an error instead of treating
527 * the event like a cache miss (otherwise it would be easy for
528 * applications to effectively disable the session cache by
529 * accident without anyone noticing).
530 */
531 SSLerr(SSL_F_SSL_GET_PREV_SESSION,
532 SSL_R_SESSION_ID_CONTEXT_UNINITIALIZED);
533 fatal = 1;
534 goto err;
535 }
536
537 if (ret->cipher == NULL) {
538 ret->cipher = ssl3_get_cipher_by_id(ret->cipher_id);
539 if (ret->cipher == NULL)
540 goto err;
541 }
542
543 if (ret->timeout < (time(NULL) - ret->time)) {
544 /* timeout */
545 s->session_ctx->stats.sess_timeout++;
546 if (try_session_cache) {
547 /* session was from the cache, so remove it */
548 SSL_CTX_remove_session(s->session_ctx, ret);
549 }
550 goto err;
551 }
552
553 s->session_ctx->stats.sess_hit++;
554
555 if (s->session != NULL)
556 SSL_SESSION_free(s->session);
557 s->session = ret;
558 s->verify_result = s->session->verify_result;
559 return 1;
560
561err:
562 if (ret != NULL) {
563 SSL_SESSION_free(ret);
564 if (!try_session_cache) {
565 /*
566 * The session was from a ticket, so we should
567 * issue a ticket for the new session.
568 */
569 s->tlsext_ticket_expected = 1;
570 }
571 }
572 if (fatal)
573 return -1;
574 else
575 return 0;
576}
577
578int
579SSL_CTX_add_session(SSL_CTX *ctx, SSL_SESSION *c)
580{
581 int ret = 0;
582 SSL_SESSION *s;
583
584 /*
585 * Add just 1 reference count for the SSL_CTX's session cache
586 * even though it has two ways of access: each session is in a
587 * doubly linked list and an lhash.
588 */
589 CRYPTO_add(&c->references, 1, CRYPTO_LOCK_SSL_SESSION);
590
591 /*
592 * If session c is in already in cache, we take back the increment
593 * later.
594 */
595 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
596 s = lh_SSL_SESSION_insert(ctx->sessions, c);
597
598 /*
599 * s != NULL iff we already had a session with the given PID.
600 * In this case, s == c should hold (then we did not really modify
601 * ctx->sessions), or we're in trouble.
602 */
603 if (s != NULL && s != c) {
604 /* We *are* in trouble ... */
605 SSL_SESSION_list_remove(ctx, s);
606 SSL_SESSION_free(s);
607 /*
608 * ... so pretend the other session did not exist in cache
609 * (we cannot handle two SSL_SESSION structures with identical
610 * session ID in the same cache, which could happen e.g. when
611 * two threads concurrently obtain the same session from an
612 * external cache).
613 */
614 s = NULL;
615 }
616
617 /* Put at the head of the queue unless it is already in the cache */
618 if (s == NULL)
619 SSL_SESSION_list_add(ctx, c);
620
621 if (s != NULL) {
622 /*
623 * existing cache entry -- decrement previously incremented
624 * reference count because it already takes into account the
625 * cache.
626 */
627 SSL_SESSION_free(s); /* s == c */
628 ret = 0;
629 } else {
630 /*
631 * New cache entry -- remove old ones if cache has become
632 * too large.
633 */
634
635 ret = 1;
636
637 if (SSL_CTX_sess_get_cache_size(ctx) > 0) {
638 while (SSL_CTX_sess_number(ctx) >
639 SSL_CTX_sess_get_cache_size(ctx)) {
640 if (!remove_session_lock(ctx,
641 ctx->session_cache_tail, 0))
642 break;
643 else
644 ctx->stats.sess_cache_full++;
645 }
646 }
647 }
648 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
649 return (ret);
650}
651
652int
653SSL_CTX_remove_session(SSL_CTX *ctx, SSL_SESSION *c)
654{
655 return remove_session_lock(ctx, c, 1);
656}
657
658static int
659remove_session_lock(SSL_CTX *ctx, SSL_SESSION *c, int lck)
660{
661 SSL_SESSION *r;
662 int ret = 0;
663
664 if ((c != NULL) && (c->session_id_length != 0)) {
665 if (lck)
666 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
667 if ((r = lh_SSL_SESSION_retrieve(ctx->sessions, c)) == c) {
668 ret = 1;
669 r = lh_SSL_SESSION_delete(ctx->sessions, c);
670 SSL_SESSION_list_remove(ctx, c);
671 }
672 if (lck)
673 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
674
675 if (ret) {
676 r->not_resumable = 1;
677 if (ctx->remove_session_cb != NULL)
678 ctx->remove_session_cb(ctx, r);
679 SSL_SESSION_free(r);
680 }
681 } else
682 ret = 0;
683 return (ret);
684}
685
686void
687SSL_SESSION_free(SSL_SESSION *ss)
688{
689 int i;
690
691 if (ss == NULL)
692 return;
693
694 i = CRYPTO_add(&ss->references, -1, CRYPTO_LOCK_SSL_SESSION);
695 if (i > 0)
696 return;
697
698 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_SESSION, ss, &ss->ex_data);
699
700 OPENSSL_cleanse(ss->master_key, sizeof ss->master_key);
701 OPENSSL_cleanse(ss->session_id, sizeof ss->session_id);
702 if (ss->sess_cert != NULL)
703 ssl_sess_cert_free(ss->sess_cert);
704 if (ss->peer != NULL)
705 X509_free(ss->peer);
706 if (ss->ciphers != NULL)
707 sk_SSL_CIPHER_free(ss->ciphers);
708 free(ss->tlsext_hostname);
709 free(ss->tlsext_tick);
710 ss->tlsext_ecpointformatlist_length = 0;
711 free(ss->tlsext_ecpointformatlist);
712 ss->tlsext_ellipticcurvelist_length = 0;
713 free(ss->tlsext_ellipticcurvelist);
714 OPENSSL_cleanse(ss, sizeof(*ss));
715 free(ss);
716}
717
718int
719SSL_set_session(SSL *s, SSL_SESSION *session)
720{
721 int ret = 0;
722 const SSL_METHOD *meth;
723
724 if (session != NULL) {
725 meth = s->ctx->method->get_ssl_method(session->ssl_version);
726 if (meth == NULL)
727 meth = s->method->get_ssl_method(session->ssl_version);
728 if (meth == NULL) {
729 SSLerr(SSL_F_SSL_SET_SESSION,
730 SSL_R_UNABLE_TO_FIND_SSL_METHOD);
731 return (0);
732 }
733
734 if (meth != s->method) {
735 if (!SSL_set_ssl_method(s, meth))
736 return (0);
737 }
738
739
740 /* CRYPTO_w_lock(CRYPTO_LOCK_SSL);*/
741 CRYPTO_add(&session->references, 1, CRYPTO_LOCK_SSL_SESSION);
742 if (s->session != NULL)
743 SSL_SESSION_free(s->session);
744 s->session = session;
745 s->verify_result = s->session->verify_result;
746 /* CRYPTO_w_unlock(CRYPTO_LOCK_SSL);*/
747 ret = 1;
748 } else {
749 if (s->session != NULL) {
750 SSL_SESSION_free(s->session);
751 s->session = NULL;
752 }
753
754 meth = s->ctx->method;
755 if (meth != s->method) {
756 if (!SSL_set_ssl_method(s, meth))
757 return (0);
758 }
759 ret = 1;
760 }
761 return (ret);
762}
763
764long
765SSL_SESSION_set_timeout(SSL_SESSION *s, long t)
766{
767 if (s == NULL)
768 return (0);
769 s->timeout = t;
770 return (1);
771}
772
773long
774SSL_SESSION_get_timeout(const SSL_SESSION *s)
775{
776 if (s == NULL)
777 return (0);
778 return (s->timeout);
779}
780
781/* XXX 2038 */
782long
783SSL_SESSION_get_time(const SSL_SESSION *s)
784{
785 if (s == NULL)
786 return (0);
787 return (s->time);
788}
789
790/* XXX 2038 */
791long
792SSL_SESSION_set_time(SSL_SESSION *s, long t)
793{
794 if (s == NULL)
795 return (0);
796 s->time = t;
797 return (t);
798}
799
800X509 *
801SSL_SESSION_get0_peer(SSL_SESSION *s)
802{
803 return s->peer;
804}
805
806int
807SSL_SESSION_set1_id_context(SSL_SESSION *s, const unsigned char *sid_ctx,
808 unsigned int sid_ctx_len)
809{
810 if (sid_ctx_len > SSL_MAX_SID_CTX_LENGTH) {
811 SSLerr(SSL_F_SSL_SESSION_SET1_ID_CONTEXT,
812 SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
813 return 0;
814 }
815 s->sid_ctx_length = sid_ctx_len;
816 memcpy(s->sid_ctx, sid_ctx, sid_ctx_len);
817
818 return 1;
819}
820
821long
822SSL_CTX_set_timeout(SSL_CTX *s, long t)
823{
824 long l;
825
826 if (s == NULL)
827 return (0);
828 l = s->session_timeout;
829 s->session_timeout = t;
830
831 return (l);
832}
833
834long
835SSL_CTX_get_timeout(const SSL_CTX *s)
836{
837 if (s == NULL)
838 return (0);
839 return (s->session_timeout);
840}
841
842int
843SSL_set_session_secret_cb(SSL *s, int (*tls_session_secret_cb)(SSL *s,
844 void *secret, int *secret_len, STACK_OF(SSL_CIPHER) *peer_ciphers,
845 SSL_CIPHER **cipher, void *arg), void *arg)
846{
847 if (s == NULL)
848 return (0);
849 s->tls_session_secret_cb = tls_session_secret_cb;
850 s->tls_session_secret_cb_arg = arg;
851 return (1);
852}
853
854int
855SSL_set_session_ticket_ext_cb(SSL *s, tls_session_ticket_ext_cb_fn cb,
856 void *arg)
857{
858 if (s == NULL)
859 return (0);
860 s->tls_session_ticket_ext_cb = cb;
861 s->tls_session_ticket_ext_cb_arg = arg;
862 return (1);
863}
864
865int
866SSL_set_session_ticket_ext(SSL *s, void *ext_data, int ext_len)
867{
868 if (s->version >= TLS1_VERSION) {
869 free(s->tlsext_session_ticket);
870 s->tlsext_session_ticket =
871 malloc(sizeof(TLS_SESSION_TICKET_EXT) + ext_len);
872 if (!s->tlsext_session_ticket) {
873 SSLerr(SSL_F_SSL_SET_SESSION_TICKET_EXT,
874 ERR_R_MALLOC_FAILURE);
875 return 0;
876 }
877
878 if (ext_data) {
879 s->tlsext_session_ticket->length = ext_len;
880 s->tlsext_session_ticket->data =
881 s->tlsext_session_ticket + 1;
882 memcpy(s->tlsext_session_ticket->data,
883 ext_data, ext_len);
884 } else {
885 s->tlsext_session_ticket->length = 0;
886 s->tlsext_session_ticket->data = NULL;
887 }
888
889 return 1;
890 }
891
892 return 0;
893}
894
895typedef struct timeout_param_st {
896 SSL_CTX *ctx;
897 long time;
898 LHASH_OF(SSL_SESSION) *cache;
899} TIMEOUT_PARAM;
900
901static void
902timeout_doall_arg(SSL_SESSION *s, TIMEOUT_PARAM *p)
903{
904 if ((p->time == 0) || (p->time > (s->time + s->timeout))) {
905 /* timeout */
906 /* The reason we don't call SSL_CTX_remove_session() is to
907 * save on locking overhead */
908 (void)lh_SSL_SESSION_delete(p->cache, s);
909 SSL_SESSION_list_remove(p->ctx, s);
910 s->not_resumable = 1;
911 if (p->ctx->remove_session_cb != NULL)
912 p->ctx->remove_session_cb(p->ctx, s);
913 SSL_SESSION_free(s);
914 }
915}
916
917static
918IMPLEMENT_LHASH_DOALL_ARG_FN(timeout, SSL_SESSION, TIMEOUT_PARAM)
919
920/* XXX 2038 */
921void
922SSL_CTX_flush_sessions(SSL_CTX *s, long t)
923{
924 unsigned long i;
925 TIMEOUT_PARAM tp;
926
927 tp.ctx = s;
928 tp.cache = s->sessions;
929 if (tp.cache == NULL)
930 return;
931 tp.time = t;
932 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
933 i = CHECKED_LHASH_OF(SSL_SESSION, tp.cache)->down_load;
934 CHECKED_LHASH_OF(SSL_SESSION, tp.cache)->down_load = 0;
935 lh_SSL_SESSION_doall_arg(tp.cache, LHASH_DOALL_ARG_FN(timeout),
936 TIMEOUT_PARAM, &tp);
937 CHECKED_LHASH_OF(SSL_SESSION, tp.cache)->down_load = i;
938 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
939}
940
941int
942ssl_clear_bad_session(SSL *s)
943{
944 if ((s->session != NULL) && !(s->shutdown & SSL_SENT_SHUTDOWN) &&
945 !(SSL_in_init(s) || SSL_in_before(s))) {
946 SSL_CTX_remove_session(s->ctx, s->session);
947 return (1);
948 } else
949 return (0);
950}
951
952/* locked by SSL_CTX in the calling function */
953static void
954SSL_SESSION_list_remove(SSL_CTX *ctx, SSL_SESSION *s)
955{
956 if ((s->next == NULL) || (s->prev == NULL))
957 return;
958
959 if (s->next == (SSL_SESSION *)&(ctx->session_cache_tail)) {
960 /* last element in list */
961 if (s->prev == (SSL_SESSION *)&(ctx->session_cache_head)) {
962 /* only one element in list */
963 ctx->session_cache_head = NULL;
964 ctx->session_cache_tail = NULL;
965 } else {
966 ctx->session_cache_tail = s->prev;
967 s->prev->next =
968 (SSL_SESSION *)&(ctx->session_cache_tail);
969 }
970 } else {
971 if (s->prev == (SSL_SESSION *)&(ctx->session_cache_head)) {
972 /* first element in list */
973 ctx->session_cache_head = s->next;
974 s->next->prev =
975 (SSL_SESSION *)&(ctx->session_cache_head);
976 } else {
977 /* middle of list */
978 s->next->prev = s->prev;
979 s->prev->next = s->next;
980 }
981 }
982 s->prev = s->next = NULL;
983}
984
985static void
986SSL_SESSION_list_add(SSL_CTX *ctx, SSL_SESSION *s)
987{
988 if ((s->next != NULL) && (s->prev != NULL))
989 SSL_SESSION_list_remove(ctx, s);
990
991 if (ctx->session_cache_head == NULL) {
992 ctx->session_cache_head = s;
993 ctx->session_cache_tail = s;
994 s->prev = (SSL_SESSION *)&(ctx->session_cache_head);
995 s->next = (SSL_SESSION *)&(ctx->session_cache_tail);
996 } else {
997 s->next = ctx->session_cache_head;
998 s->next->prev = s;
999 s->prev = (SSL_SESSION *)&(ctx->session_cache_head);
1000 ctx->session_cache_head = s;
1001 }
1002}
1003
1004void
1005SSL_CTX_sess_set_new_cb(SSL_CTX *ctx,
1006 int (*cb)(struct ssl_st *ssl, SSL_SESSION *sess)) {
1007 ctx->new_session_cb = cb;
1008}
1009
1010int
1011(*SSL_CTX_sess_get_new_cb(SSL_CTX *ctx))(SSL *ssl, SSL_SESSION *sess)
1012{
1013 return ctx->new_session_cb;
1014}
1015
1016void
1017SSL_CTX_sess_set_remove_cb(SSL_CTX *ctx,
1018 void (*cb)(SSL_CTX *ctx, SSL_SESSION *sess))
1019{
1020 ctx->remove_session_cb = cb;
1021}
1022
1023void
1024(*SSL_CTX_sess_get_remove_cb(SSL_CTX *ctx))(SSL_CTX * ctx, SSL_SESSION *sess)
1025{
1026 return ctx->remove_session_cb;
1027}
1028
1029void
1030SSL_CTX_sess_set_get_cb(SSL_CTX *ctx, SSL_SESSION *(*cb)(struct ssl_st *ssl,
1031 unsigned char *data, int len, int *copy))
1032{
1033 ctx->get_session_cb = cb;
1034}
1035
1036SSL_SESSION *
1037(*SSL_CTX_sess_get_get_cb(SSL_CTX *ctx))(SSL *ssl, unsigned char *data,
1038 int len, int *copy)
1039{
1040 return ctx->get_session_cb;
1041}
1042
1043void
1044SSL_CTX_set_info_callback(SSL_CTX *ctx,
1045 void (*cb)(const SSL *ssl, int type, int val))
1046{
1047 ctx->info_callback = cb;
1048}
1049
1050void
1051(*SSL_CTX_get_info_callback(SSL_CTX *ctx))(const SSL *ssl, int type, int val)
1052{
1053 return ctx->info_callback;
1054}
1055
1056void
1057SSL_CTX_set_client_cert_cb(SSL_CTX *ctx,
1058 int (*cb)(SSL *ssl, X509 **x509, EVP_PKEY **pkey))
1059{
1060 ctx->client_cert_cb = cb;
1061}
1062
1063int
1064(*SSL_CTX_get_client_cert_cb(SSL_CTX *ctx))(SSL * ssl, X509 ** x509,
1065 EVP_PKEY **pkey)
1066{
1067 return ctx->client_cert_cb;
1068}
1069
1070#ifndef OPENSSL_NO_ENGINE
1071int
1072SSL_CTX_set_client_cert_engine(SSL_CTX *ctx, ENGINE *e)
1073{
1074 if (!ENGINE_init(e)) {
1075 SSLerr(SSL_F_SSL_CTX_SET_CLIENT_CERT_ENGINE,
1076 ERR_R_ENGINE_LIB);
1077 return 0;
1078 }
1079 if (!ENGINE_get_ssl_client_cert_function(e)) {
1080 SSLerr(SSL_F_SSL_CTX_SET_CLIENT_CERT_ENGINE,
1081 SSL_R_NO_CLIENT_CERT_METHOD);
1082 ENGINE_finish(e);
1083 return 0;
1084 }
1085 ctx->client_cert_engine = e;
1086 return 1;
1087}
1088#endif
1089
1090void
1091SSL_CTX_set_cookie_generate_cb(SSL_CTX *ctx,
1092 int (*cb)(SSL *ssl, unsigned char *cookie, unsigned int *cookie_len))
1093{
1094 ctx->app_gen_cookie_cb = cb;
1095}
1096
1097void
1098SSL_CTX_set_cookie_verify_cb(SSL_CTX *ctx,
1099 int (*cb)(SSL *ssl, unsigned char *cookie, unsigned int cookie_len))
1100{
1101 ctx->app_verify_cookie_cb = cb;
1102}
1103
1104IMPLEMENT_PEM_rw(SSL_SESSION, SSL_SESSION, PEM_STRING_SSL_SESSION, SSL_SESSION)