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1/* $OpenBSD: ssl_sess.c,v 1.122 2023/07/08 16:40:13 beck 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#include <openssl/opensslconf.h>
140
141#ifndef OPENSSL_NO_ENGINE
142#include <openssl/engine.h>
143#endif
144
145#include "ssl_local.h"
146
147static void SSL_SESSION_list_remove(SSL_CTX *ctx, SSL_SESSION *s);
148static void SSL_SESSION_list_add(SSL_CTX *ctx, SSL_SESSION *s);
149static int remove_session_lock(SSL_CTX *ctx, SSL_SESSION *c, int lck);
150
151/* aka SSL_get0_session; gets 0 objects, just returns a copy of the pointer */
152SSL_SESSION *
153SSL_get_session(const SSL *ssl)
154{
155 return (ssl->session);
156}
157LSSL_ALIAS(SSL_get_session);
158
159/* variant of SSL_get_session: caller really gets something */
160SSL_SESSION *
161SSL_get1_session(SSL *ssl)
162{
163 SSL_SESSION *sess;
164
165 /*
166 * Need to lock this all up rather than just use CRYPTO_add so that
167 * somebody doesn't free ssl->session between when we check it's
168 * non-null and when we up the reference count.
169 */
170 CRYPTO_w_lock(CRYPTO_LOCK_SSL_SESSION);
171 sess = ssl->session;
172 if (sess)
173 sess->references++;
174 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_SESSION);
175
176 return (sess);
177}
178LSSL_ALIAS(SSL_get1_session);
179
180int
181SSL_SESSION_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
182 CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func)
183{
184 return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL_SESSION,
185 argl, argp, new_func, dup_func, free_func);
186}
187LSSL_ALIAS(SSL_SESSION_get_ex_new_index);
188
189int
190SSL_SESSION_set_ex_data(SSL_SESSION *s, int idx, void *arg)
191{
192 return (CRYPTO_set_ex_data(&s->ex_data, idx, arg));
193}
194LSSL_ALIAS(SSL_SESSION_set_ex_data);
195
196void *
197SSL_SESSION_get_ex_data(const SSL_SESSION *s, int idx)
198{
199 return (CRYPTO_get_ex_data(&s->ex_data, idx));
200}
201LSSL_ALIAS(SSL_SESSION_get_ex_data);
202
203uint32_t
204SSL_SESSION_get_max_early_data(const SSL_SESSION *s)
205{
206 return 0;
207}
208LSSL_ALIAS(SSL_SESSION_get_max_early_data);
209
210int
211SSL_SESSION_set_max_early_data(SSL_SESSION *s, uint32_t max_early_data)
212{
213 return 1;
214}
215LSSL_ALIAS(SSL_SESSION_set_max_early_data);
216
217SSL_SESSION *
218SSL_SESSION_new(void)
219{
220 SSL_SESSION *ss;
221
222 if (!OPENSSL_init_ssl(0, NULL)) {
223 SSLerrorx(SSL_R_LIBRARY_BUG);
224 return(NULL);
225 }
226
227 if ((ss = calloc(1, sizeof(*ss))) == NULL) {
228 SSLerrorx(ERR_R_MALLOC_FAILURE);
229 return (NULL);
230 }
231
232 ss->verify_result = 1; /* avoid 0 (= X509_V_OK) just in case */
233 ss->references = 1;
234 ss->timeout = 60 * 5 + 4; /* 5 minutes 4 seconds timeout by default */
235 ss->time = time(NULL);
236 ss->prev = NULL;
237 ss->next = NULL;
238 ss->tlsext_hostname = NULL;
239
240 ss->peer_cert_type = -1;
241
242 ss->tlsext_ecpointformatlist_length = 0;
243 ss->tlsext_ecpointformatlist = NULL;
244 ss->tlsext_supportedgroups_length = 0;
245 ss->tlsext_supportedgroups = NULL;
246
247 CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_SESSION, ss, &ss->ex_data);
248
249 return (ss);
250}
251LSSL_ALIAS(SSL_SESSION_new);
252
253SSL_SESSION *
254ssl_session_dup(SSL_SESSION *sess, int include_ticket)
255{
256 SSL_SESSION *copy;
257 CBS cbs;
258
259 if ((copy = calloc(1, sizeof(*copy))) == NULL) {
260 SSLerrorx(ERR_R_MALLOC_FAILURE);
261 goto err;
262 }
263
264 copy->ssl_version = sess->ssl_version;
265
266 CBS_init(&cbs, sess->master_key, sess->master_key_length);
267 if (!CBS_write_bytes(&cbs, copy->master_key, sizeof(copy->master_key),
268 &copy->master_key_length))
269 goto err;
270
271 CBS_init(&cbs, sess->session_id, sess->session_id_length);
272 if (!CBS_write_bytes(&cbs, copy->session_id, sizeof(copy->session_id),
273 &copy->session_id_length))
274 goto err;
275
276 CBS_init(&cbs, sess->sid_ctx, sess->sid_ctx_length);
277 if (!CBS_write_bytes(&cbs, copy->sid_ctx, sizeof(copy->sid_ctx),
278 &copy->sid_ctx_length))
279 goto err;
280
281 if (sess->peer_cert != NULL) {
282 if (!X509_up_ref(sess->peer_cert))
283 goto err;
284 copy->peer_cert = sess->peer_cert;
285 }
286 copy->peer_cert_type = sess->peer_cert_type;
287
288 copy->verify_result = sess->verify_result;
289
290 copy->timeout = sess->timeout;
291 copy->time = sess->time;
292 copy->references = 1;
293
294 copy->cipher = sess->cipher;
295 copy->cipher_id = sess->cipher_id;
296
297 if (sess->ciphers != NULL) {
298 if ((copy->ciphers = sk_SSL_CIPHER_dup(sess->ciphers)) == NULL)
299 goto err;
300 }
301
302 if (sess->tlsext_hostname != NULL) {
303 copy->tlsext_hostname = strdup(sess->tlsext_hostname);
304 if (copy->tlsext_hostname == NULL)
305 goto err;
306 }
307
308 if (include_ticket) {
309 CBS_init(&cbs, sess->tlsext_tick, sess->tlsext_ticklen);
310 if (!CBS_stow(&cbs, &copy->tlsext_tick, &copy->tlsext_ticklen))
311 goto err;
312 copy->tlsext_tick_lifetime_hint =
313 sess->tlsext_tick_lifetime_hint;
314
315 /*
316 * XXX - copy sess->resumption_master_secret and all other
317 * TLSv1.3 info here.
318 */
319 }
320
321 if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_SESSION, copy,
322 &copy->ex_data))
323 goto err;
324
325 if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_SSL_SESSION, &copy->ex_data,
326 &sess->ex_data))
327 goto err;
328
329 /* Omit prev/next: the new session gets its own slot in the cache. */
330
331 copy->not_resumable = sess->not_resumable;
332
333 CBS_init(&cbs, sess->tlsext_ecpointformatlist,
334 sess->tlsext_ecpointformatlist_length);
335 if (!CBS_stow(&cbs, &copy->tlsext_ecpointformatlist,
336 &copy->tlsext_ecpointformatlist_length))
337 goto err;
338
339 if (sess->tlsext_supportedgroups != NULL) {
340 if ((copy->tlsext_supportedgroups = calloc(sizeof(uint16_t),
341 sess->tlsext_supportedgroups_length)) == NULL)
342 goto err;
343 memcpy(copy->tlsext_supportedgroups,
344 sess->tlsext_supportedgroups,
345 sizeof(uint16_t) * sess->tlsext_supportedgroups_length);
346 copy->tlsext_supportedgroups_length =
347 sess->tlsext_supportedgroups_length;
348 }
349
350 return copy;
351
352 err:
353 SSL_SESSION_free(copy);
354
355 return NULL;
356}
357
358const unsigned char *
359SSL_SESSION_get_id(const SSL_SESSION *ss, unsigned int *len)
360{
361 if (len != NULL)
362 *len = (unsigned int)ss->session_id_length;
363 return ss->session_id;
364}
365LSSL_ALIAS(SSL_SESSION_get_id);
366
367const unsigned char *
368SSL_SESSION_get0_id_context(const SSL_SESSION *ss, unsigned int *len)
369{
370 if (len != NULL)
371 *len = (unsigned int)ss->sid_ctx_length;
372 return ss->sid_ctx;
373}
374LSSL_ALIAS(SSL_SESSION_get0_id_context);
375
376unsigned int
377SSL_SESSION_get_compress_id(const SSL_SESSION *ss)
378{
379 return 0;
380}
381LSSL_ALIAS(SSL_SESSION_get_compress_id);
382
383unsigned long
384SSL_SESSION_get_ticket_lifetime_hint(const SSL_SESSION *s)
385{
386 return s->tlsext_tick_lifetime_hint;
387}
388LSSL_ALIAS(SSL_SESSION_get_ticket_lifetime_hint);
389
390int
391SSL_SESSION_has_ticket(const SSL_SESSION *s)
392{
393 return (s->tlsext_ticklen > 0) ? 1 : 0;
394}
395LSSL_ALIAS(SSL_SESSION_has_ticket);
396
397/*
398 * SSLv3/TLSv1 has 32 bytes (256 bits) of session ID space. As such, filling
399 * the ID with random gunk repeatedly until we have no conflict is going to
400 * complete in one iteration pretty much "most" of the time (btw:
401 * understatement). So, if it takes us 10 iterations and we still can't avoid
402 * a conflict - well that's a reasonable point to call it quits. Either the
403 * arc4random code is broken or someone is trying to open roughly very close to
404 * 2^128 (or 2^256) SSL sessions to our server. How you might store that many
405 * sessions is perhaps a more interesting question...
406 */
407
408#define MAX_SESS_ID_ATTEMPTS 10
409
410static int
411def_generate_session_id(const SSL *ssl, unsigned char *id, unsigned int *id_len)
412{
413 unsigned int retry = 0;
414
415 do {
416 arc4random_buf(id, *id_len);
417 } while (SSL_has_matching_session_id(ssl, id, *id_len) &&
418 (++retry < MAX_SESS_ID_ATTEMPTS));
419
420 if (retry < MAX_SESS_ID_ATTEMPTS)
421 return 1;
422
423 /* else - woops a session_id match */
424 /* XXX We should also check the external cache --
425 * but the probability of a collision is negligible, and
426 * we could not prevent the concurrent creation of sessions
427 * with identical IDs since we currently don't have means
428 * to atomically check whether a session ID already exists
429 * and make a reservation for it if it does not
430 * (this problem applies to the internal cache as well).
431 */
432 return 0;
433}
434
435int
436ssl_get_new_session(SSL *s, int session)
437{
438 unsigned int tmp;
439 SSL_SESSION *ss = NULL;
440 GEN_SESSION_CB cb = def_generate_session_id;
441
442 /* This gets used by clients and servers. */
443
444 if ((ss = SSL_SESSION_new()) == NULL)
445 return (0);
446
447 /* If the context has a default timeout, use it */
448 if (s->session_ctx->session_timeout == 0)
449 ss->timeout = SSL_get_default_timeout(s);
450 else
451 ss->timeout = s->session_ctx->session_timeout;
452
453 if (s->session != NULL) {
454 SSL_SESSION_free(s->session);
455 s->session = NULL;
456 }
457
458 if (session) {
459 switch (s->version) {
460 case TLS1_VERSION:
461 case TLS1_1_VERSION:
462 case TLS1_2_VERSION:
463 case DTLS1_VERSION:
464 case DTLS1_2_VERSION:
465 ss->ssl_version = s->version;
466 ss->session_id_length = SSL3_SSL_SESSION_ID_LENGTH;
467 break;
468 default:
469 SSLerror(s, SSL_R_UNSUPPORTED_SSL_VERSION);
470 SSL_SESSION_free(ss);
471 return (0);
472 }
473
474 /* If RFC4507 ticket use empty session ID. */
475 if (s->tlsext_ticket_expected) {
476 ss->session_id_length = 0;
477 goto sess_id_done;
478 }
479
480 /* Choose which callback will set the session ID. */
481 CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);
482 if (s->generate_session_id)
483 cb = s->generate_session_id;
484 else if (s->session_ctx->generate_session_id)
485 cb = s->session_ctx->generate_session_id;
486 CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
487
488 /* Choose a session ID. */
489 tmp = ss->session_id_length;
490 if (!cb(s, ss->session_id, &tmp)) {
491 /* The callback failed */
492 SSLerror(s, SSL_R_SSL_SESSION_ID_CALLBACK_FAILED);
493 SSL_SESSION_free(ss);
494 return (0);
495 }
496
497 /*
498 * Don't allow the callback to set the session length to zero.
499 * nor set it higher than it was.
500 */
501 if (tmp == 0 || tmp > ss->session_id_length) {
502 /* The callback set an illegal length */
503 SSLerror(s, SSL_R_SSL_SESSION_ID_HAS_BAD_LENGTH);
504 SSL_SESSION_free(ss);
505 return (0);
506 }
507 ss->session_id_length = tmp;
508
509 /* Finally, check for a conflict. */
510 if (SSL_has_matching_session_id(s, ss->session_id,
511 ss->session_id_length)) {
512 SSLerror(s, SSL_R_SSL_SESSION_ID_CONFLICT);
513 SSL_SESSION_free(ss);
514 return (0);
515 }
516
517 sess_id_done:
518 if (s->tlsext_hostname) {
519 ss->tlsext_hostname = strdup(s->tlsext_hostname);
520 if (ss->tlsext_hostname == NULL) {
521 SSLerror(s, ERR_R_INTERNAL_ERROR);
522 SSL_SESSION_free(ss);
523 return 0;
524 }
525 }
526 } else {
527 ss->session_id_length = 0;
528 }
529
530 if (s->sid_ctx_length > sizeof ss->sid_ctx) {
531 SSLerror(s, ERR_R_INTERNAL_ERROR);
532 SSL_SESSION_free(ss);
533 return 0;
534 }
535
536 memcpy(ss->sid_ctx, s->sid_ctx, s->sid_ctx_length);
537 ss->sid_ctx_length = s->sid_ctx_length;
538 s->session = ss;
539 ss->ssl_version = s->version;
540 ss->verify_result = X509_V_OK;
541
542 return (1);
543}
544
545static SSL_SESSION *
546ssl_session_from_cache(SSL *s, CBS *session_id)
547{
548 SSL_SESSION *sess;
549 SSL_SESSION data;
550
551 if ((s->session_ctx->session_cache_mode &
552 SSL_SESS_CACHE_NO_INTERNAL_LOOKUP))
553 return NULL;
554
555 memset(&data, 0, sizeof(data));
556
557 data.ssl_version = s->version;
558
559 if (!CBS_write_bytes(session_id, data.session_id,
560 sizeof(data.session_id), &data.session_id_length))
561 return NULL;
562
563 CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);
564 sess = lh_SSL_SESSION_retrieve(s->session_ctx->sessions, &data);
565 if (sess != NULL)
566 CRYPTO_add(&sess->references, 1, CRYPTO_LOCK_SSL_SESSION);
567 CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
568
569 if (sess == NULL)
570 s->session_ctx->stats.sess_miss++;
571
572 return sess;
573}
574
575static SSL_SESSION *
576ssl_session_from_callback(SSL *s, CBS *session_id)
577{
578 SSL_SESSION *sess;
579 int copy;
580
581 if (s->session_ctx->get_session_cb == NULL)
582 return NULL;
583
584 copy = 1;
585 if ((sess = s->session_ctx->get_session_cb(s,
586 CBS_data(session_id), CBS_len(session_id), &copy)) == NULL)
587 return NULL;
588 /*
589 * The copy handler may have set copy == 0 to indicate that the session
590 * structures are shared between threads and that it handles the
591 * reference count itself. If it didn't set copy to zero, we must
592 * increment the reference count.
593 */
594 if (copy)
595 CRYPTO_add(&sess->references, 1, CRYPTO_LOCK_SSL_SESSION);
596
597 s->session_ctx->stats.sess_cb_hit++;
598
599 /* Add the externally cached session to the internal cache as well. */
600 if (!(s->session_ctx->session_cache_mode &
601 SSL_SESS_CACHE_NO_INTERNAL_STORE)) {
602 /*
603 * The following should not return 1,
604 * otherwise, things are very strange.
605 */
606 SSL_CTX_add_session(s->session_ctx, sess);
607 }
608
609 return sess;
610}
611
612static SSL_SESSION *
613ssl_session_by_id(SSL *s, CBS *session_id)
614{
615 SSL_SESSION *sess;
616
617 if (CBS_len(session_id) == 0)
618 return NULL;
619
620 if ((sess = ssl_session_from_cache(s, session_id)) == NULL)
621 sess = ssl_session_from_callback(s, session_id);
622
623 return sess;
624}
625
626/*
627 * ssl_get_prev_session attempts to find an SSL_SESSION to be used to resume
628 * this connection. It is only called by servers.
629 *
630 * session_id: points at the session ID in the ClientHello. This code will
631 * read past the end of this in order to parse out the session ticket
632 * extension, if any.
633 * ext_block: a CBS for the ClientHello extensions block.
634 * alert: alert that the caller should send in case of failure.
635 *
636 * Returns:
637 * -1: error
638 * 0: a session may have been found.
639 *
640 * Side effects:
641 * - If a session is found then s->session is pointed at it (after freeing
642 * an existing session if need be) and s->verify_result is set from the
643 * session.
644 * - For both new and resumed sessions, s->tlsext_ticket_expected
645 * indicates whether the server should issue a new session ticket or not.
646 */
647int
648ssl_get_prev_session(SSL *s, CBS *session_id, CBS *ext_block, int *alert)
649{
650 SSL_SESSION *sess = NULL;
651 int alert_desc = SSL_AD_INTERNAL_ERROR, fatal = 0;
652 int ticket_decrypted = 0;
653
654 /* This is used only by servers. */
655
656 if (CBS_len(session_id) > SSL_MAX_SSL_SESSION_ID_LENGTH)
657 goto err;
658
659 /* Sets s->tlsext_ticket_expected. */
660 switch (tls1_process_ticket(s, ext_block, &alert_desc, &sess)) {
661 case TLS1_TICKET_FATAL_ERROR:
662 fatal = 1;
663 goto err;
664 case TLS1_TICKET_NONE:
665 case TLS1_TICKET_EMPTY:
666 if ((sess = ssl_session_by_id(s, session_id)) == NULL)
667 goto err;
668 break;
669 case TLS1_TICKET_NOT_DECRYPTED:
670 goto err;
671 case TLS1_TICKET_DECRYPTED:
672 ticket_decrypted = 1;
673
674 /*
675 * The session ID is used by some clients to detect that the
676 * ticket has been accepted so we copy it into sess.
677 */
678 if (!CBS_write_bytes(session_id, sess->session_id,
679 sizeof(sess->session_id), &sess->session_id_length)) {
680 fatal = 1;
681 goto err;
682 }
683 break;
684 default:
685 SSLerror(s, ERR_R_INTERNAL_ERROR);
686 fatal = 1;
687 goto err;
688 }
689
690 /* Now sess is non-NULL and we own one of its reference counts. */
691
692 if (sess->sid_ctx_length != s->sid_ctx_length ||
693 timingsafe_memcmp(sess->sid_ctx, s->sid_ctx,
694 sess->sid_ctx_length) != 0) {
695 /*
696 * We have the session requested by the client, but we don't
697 * want to use it in this context. Treat it like a cache miss.
698 */
699 goto err;
700 }
701
702 if ((s->verify_mode & SSL_VERIFY_PEER) && s->sid_ctx_length == 0) {
703 /*
704 * We can't be sure if this session is being used out of
705 * context, which is especially important for SSL_VERIFY_PEER.
706 * The application should have used
707 * SSL[_CTX]_set_session_id_context.
708 *
709 * For this error case, we generate an error instead of treating
710 * the event like a cache miss (otherwise it would be easy for
711 * applications to effectively disable the session cache by
712 * accident without anyone noticing).
713 */
714 SSLerror(s, SSL_R_SESSION_ID_CONTEXT_UNINITIALIZED);
715 fatal = 1;
716 goto err;
717 }
718
719 if (sess->cipher == NULL) {
720 sess->cipher = ssl3_get_cipher_by_id(sess->cipher_id);
721 if (sess->cipher == NULL)
722 goto err;
723 }
724
725 if (sess->timeout < (time(NULL) - sess->time)) {
726 s->session_ctx->stats.sess_timeout++;
727 if (!ticket_decrypted) {
728 /* The session was from the cache, so remove it. */
729 SSL_CTX_remove_session(s->session_ctx, sess);
730 }
731 goto err;
732 }
733
734 s->session_ctx->stats.sess_hit++;
735
736 SSL_SESSION_free(s->session);
737 s->session = sess;
738 s->verify_result = s->session->verify_result;
739
740 return 1;
741
742 err:
743 SSL_SESSION_free(sess);
744 if (ticket_decrypted) {
745 /*
746 * The session was from a ticket. Issue a ticket for the new
747 * session.
748 */
749 s->tlsext_ticket_expected = 1;
750 }
751 if (fatal) {
752 *alert = alert_desc;
753 return -1;
754 }
755 return 0;
756}
757
758int
759SSL_CTX_add_session(SSL_CTX *ctx, SSL_SESSION *c)
760{
761 int ret = 0;
762 SSL_SESSION *s;
763
764 /*
765 * Add just 1 reference count for the SSL_CTX's session cache
766 * even though it has two ways of access: each session is in a
767 * doubly linked list and an lhash.
768 */
769 CRYPTO_add(&c->references, 1, CRYPTO_LOCK_SSL_SESSION);
770
771 /*
772 * If session c is in already in cache, we take back the increment
773 * later.
774 */
775 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
776 s = lh_SSL_SESSION_insert(ctx->sessions, c);
777
778 /*
779 * s != NULL iff we already had a session with the given PID.
780 * In this case, s == c should hold (then we did not really modify
781 * ctx->sessions), or we're in trouble.
782 */
783 if (s != NULL && s != c) {
784 /* We *are* in trouble ... */
785 SSL_SESSION_list_remove(ctx, s);
786 SSL_SESSION_free(s);
787 /*
788 * ... so pretend the other session did not exist in cache
789 * (we cannot handle two SSL_SESSION structures with identical
790 * session ID in the same cache, which could happen e.g. when
791 * two threads concurrently obtain the same session from an
792 * external cache).
793 */
794 s = NULL;
795 }
796
797 /* Put at the head of the queue unless it is already in the cache */
798 if (s == NULL)
799 SSL_SESSION_list_add(ctx, c);
800
801 if (s != NULL) {
802 /*
803 * existing cache entry -- decrement previously incremented
804 * reference count because it already takes into account the
805 * cache.
806 */
807 SSL_SESSION_free(s); /* s == c */
808 ret = 0;
809 } else {
810 /*
811 * New cache entry -- remove old ones if cache has become
812 * too large.
813 */
814
815 ret = 1;
816
817 if (SSL_CTX_sess_get_cache_size(ctx) > 0) {
818 while (SSL_CTX_sess_number(ctx) >
819 SSL_CTX_sess_get_cache_size(ctx)) {
820 if (!remove_session_lock(ctx,
821 ctx->session_cache_tail, 0))
822 break;
823 else
824 ctx->stats.sess_cache_full++;
825 }
826 }
827 }
828 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
829 return (ret);
830}
831LSSL_ALIAS(SSL_CTX_add_session);
832
833int
834SSL_CTX_remove_session(SSL_CTX *ctx, SSL_SESSION *c)
835{
836 return remove_session_lock(ctx, c, 1);
837}
838LSSL_ALIAS(SSL_CTX_remove_session);
839
840static int
841remove_session_lock(SSL_CTX *ctx, SSL_SESSION *c, int lck)
842{
843 SSL_SESSION *r;
844 int ret = 0;
845
846 if (c == NULL || c->session_id_length == 0)
847 return 0;
848
849 if (lck)
850 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
851 if ((r = lh_SSL_SESSION_retrieve(ctx->sessions, c)) == c) {
852 ret = 1;
853 r = lh_SSL_SESSION_delete(ctx->sessions, c);
854 SSL_SESSION_list_remove(ctx, c);
855 }
856 if (lck)
857 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
858
859 if (ret) {
860 r->not_resumable = 1;
861 if (ctx->remove_session_cb != NULL)
862 ctx->remove_session_cb(ctx, r);
863 SSL_SESSION_free(r);
864 }
865
866 return ret;
867}
868
869void
870SSL_SESSION_free(SSL_SESSION *ss)
871{
872 int i;
873
874 if (ss == NULL)
875 return;
876
877 i = CRYPTO_add(&ss->references, -1, CRYPTO_LOCK_SSL_SESSION);
878 if (i > 0)
879 return;
880
881 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_SESSION, ss, &ss->ex_data);
882
883 explicit_bzero(ss->master_key, sizeof ss->master_key);
884 explicit_bzero(ss->session_id, sizeof ss->session_id);
885
886 X509_free(ss->peer_cert);
887
888 sk_SSL_CIPHER_free(ss->ciphers);
889
890 free(ss->tlsext_hostname);
891 free(ss->tlsext_tick);
892 free(ss->tlsext_ecpointformatlist);
893 free(ss->tlsext_supportedgroups);
894
895 tls13_secret_cleanup(&ss->resumption_master_secret);
896
897 freezero(ss, sizeof(*ss));
898}
899LSSL_ALIAS(SSL_SESSION_free);
900
901int
902SSL_SESSION_up_ref(SSL_SESSION *ss)
903{
904 int refs = CRYPTO_add(&ss->references, 1, CRYPTO_LOCK_SSL_SESSION);
905 return (refs > 1) ? 1 : 0;
906}
907LSSL_ALIAS(SSL_SESSION_up_ref);
908
909int
910SSL_set_session(SSL *s, SSL_SESSION *session)
911{
912 const SSL_METHOD *method;
913
914 if (session == NULL) {
915 SSL_SESSION_free(s->session);
916 s->session = NULL;
917
918 return SSL_set_ssl_method(s, s->ctx->method);
919 }
920
921 if ((method = ssl_get_method(session->ssl_version)) == NULL) {
922 SSLerror(s, SSL_R_UNABLE_TO_FIND_SSL_METHOD);
923 return (0);
924 }
925
926 if (!SSL_set_ssl_method(s, method))
927 return (0);
928
929 CRYPTO_add(&session->references, 1, CRYPTO_LOCK_SSL_SESSION);
930 SSL_SESSION_free(s->session);
931 s->session = session;
932 s->verify_result = s->session->verify_result;
933
934 return (1);
935}
936LSSL_ALIAS(SSL_set_session);
937
938size_t
939SSL_SESSION_get_master_key(const SSL_SESSION *ss, unsigned char *out,
940 size_t max_out)
941{
942 size_t len = ss->master_key_length;
943
944 if (out == NULL)
945 return len;
946
947 if (len > max_out)
948 len = max_out;
949
950 memcpy(out, ss->master_key, len);
951
952 return len;
953}
954LSSL_ALIAS(SSL_SESSION_get_master_key);
955
956long
957SSL_SESSION_set_timeout(SSL_SESSION *s, long t)
958{
959 if (s == NULL)
960 return (0);
961 s->timeout = t;
962 return (1);
963}
964LSSL_ALIAS(SSL_SESSION_set_timeout);
965
966long
967SSL_SESSION_get_timeout(const SSL_SESSION *s)
968{
969 if (s == NULL)
970 return (0);
971 return (s->timeout);
972}
973LSSL_ALIAS(SSL_SESSION_get_timeout);
974
975/* XXX 2038 */
976long
977SSL_SESSION_get_time(const SSL_SESSION *s)
978{
979 if (s == NULL)
980 return (0);
981 return (s->time);
982}
983LSSL_ALIAS(SSL_SESSION_get_time);
984
985/* XXX 2038 */
986long
987SSL_SESSION_set_time(SSL_SESSION *s, long t)
988{
989 if (s == NULL)
990 return (0);
991 s->time = t;
992 return (t);
993}
994LSSL_ALIAS(SSL_SESSION_set_time);
995
996int
997SSL_SESSION_get_protocol_version(const SSL_SESSION *s)
998{
999 return s->ssl_version;
1000}
1001LSSL_ALIAS(SSL_SESSION_get_protocol_version);
1002
1003const SSL_CIPHER *
1004SSL_SESSION_get0_cipher(const SSL_SESSION *s)
1005{
1006 return s->cipher;
1007}
1008LSSL_ALIAS(SSL_SESSION_get0_cipher);
1009
1010X509 *
1011SSL_SESSION_get0_peer(SSL_SESSION *s)
1012{
1013 return s->peer_cert;
1014}
1015LSSL_ALIAS(SSL_SESSION_get0_peer);
1016
1017int
1018SSL_SESSION_set1_id(SSL_SESSION *s, const unsigned char *sid,
1019 unsigned int sid_len)
1020{
1021 if (sid_len > SSL_MAX_SSL_SESSION_ID_LENGTH) {
1022 SSLerrorx(SSL_R_SSL_SESSION_ID_TOO_LONG);
1023 return 0;
1024 }
1025 s->session_id_length = sid_len;
1026 memmove(s->session_id, sid, sid_len);
1027 return 1;
1028}
1029LSSL_ALIAS(SSL_SESSION_set1_id);
1030
1031int
1032SSL_SESSION_set1_id_context(SSL_SESSION *s, const unsigned char *sid_ctx,
1033 unsigned int sid_ctx_len)
1034{
1035 if (sid_ctx_len > SSL_MAX_SID_CTX_LENGTH) {
1036 SSLerrorx(SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
1037 return 0;
1038 }
1039 s->sid_ctx_length = sid_ctx_len;
1040 memcpy(s->sid_ctx, sid_ctx, sid_ctx_len);
1041
1042 return 1;
1043}
1044LSSL_ALIAS(SSL_SESSION_set1_id_context);
1045
1046int
1047SSL_SESSION_is_resumable(const SSL_SESSION *s)
1048{
1049 return 0;
1050}
1051LSSL_ALIAS(SSL_SESSION_is_resumable);
1052
1053long
1054SSL_CTX_set_timeout(SSL_CTX *s, long t)
1055{
1056 long l;
1057
1058 if (s == NULL)
1059 return (0);
1060 l = s->session_timeout;
1061 s->session_timeout = t;
1062
1063 return (l);
1064}
1065LSSL_ALIAS(SSL_CTX_set_timeout);
1066
1067long
1068SSL_CTX_get_timeout(const SSL_CTX *s)
1069{
1070 if (s == NULL)
1071 return (0);
1072 return (s->session_timeout);
1073}
1074LSSL_ALIAS(SSL_CTX_get_timeout);
1075
1076int
1077SSL_set_session_secret_cb(SSL *s, int (*tls_session_secret_cb)(SSL *s,
1078 void *secret, int *secret_len, STACK_OF(SSL_CIPHER) *peer_ciphers,
1079 SSL_CIPHER **cipher, void *arg), void *arg)
1080{
1081 if (s == NULL)
1082 return (0);
1083 s->tls_session_secret_cb = tls_session_secret_cb;
1084 s->tls_session_secret_cb_arg = arg;
1085 return (1);
1086}
1087LSSL_ALIAS(SSL_set_session_secret_cb);
1088
1089int
1090SSL_set_session_ticket_ext_cb(SSL *s, tls_session_ticket_ext_cb_fn cb,
1091 void *arg)
1092{
1093 if (s == NULL)
1094 return (0);
1095 s->tls_session_ticket_ext_cb = cb;
1096 s->tls_session_ticket_ext_cb_arg = arg;
1097 return (1);
1098}
1099LSSL_ALIAS(SSL_set_session_ticket_ext_cb);
1100
1101int
1102SSL_set_session_ticket_ext(SSL *s, void *ext_data, int ext_len)
1103{
1104 if (s->version >= TLS1_VERSION) {
1105 free(s->tlsext_session_ticket);
1106 s->tlsext_session_ticket =
1107 malloc(sizeof(TLS_SESSION_TICKET_EXT) + ext_len);
1108 if (!s->tlsext_session_ticket) {
1109 SSLerror(s, ERR_R_MALLOC_FAILURE);
1110 return 0;
1111 }
1112
1113 if (ext_data) {
1114 s->tlsext_session_ticket->length = ext_len;
1115 s->tlsext_session_ticket->data =
1116 s->tlsext_session_ticket + 1;
1117 memcpy(s->tlsext_session_ticket->data,
1118 ext_data, ext_len);
1119 } else {
1120 s->tlsext_session_ticket->length = 0;
1121 s->tlsext_session_ticket->data = NULL;
1122 }
1123
1124 return 1;
1125 }
1126
1127 return 0;
1128}
1129LSSL_ALIAS(SSL_set_session_ticket_ext);
1130
1131typedef struct timeout_param_st {
1132 SSL_CTX *ctx;
1133 long time;
1134 struct lhash_st_SSL_SESSION *cache;
1135} TIMEOUT_PARAM;
1136
1137static void
1138timeout_doall_arg(SSL_SESSION *s, TIMEOUT_PARAM *p)
1139{
1140 if ((p->time == 0) || (p->time > (s->time + s->timeout))) {
1141 /* timeout */
1142 /* The reason we don't call SSL_CTX_remove_session() is to
1143 * save on locking overhead */
1144 (void)lh_SSL_SESSION_delete(p->cache, s);
1145 SSL_SESSION_list_remove(p->ctx, s);
1146 s->not_resumable = 1;
1147 if (p->ctx->remove_session_cb != NULL)
1148 p->ctx->remove_session_cb(p->ctx, s);
1149 SSL_SESSION_free(s);
1150 }
1151}
1152
1153static void
1154timeout_LHASH_DOALL_ARG(void *arg1, void *arg2)
1155{
1156 SSL_SESSION *a = arg1;
1157 TIMEOUT_PARAM *b = arg2;
1158
1159 timeout_doall_arg(a, b);
1160}
1161
1162/* XXX 2038 */
1163void
1164SSL_CTX_flush_sessions(SSL_CTX *s, long t)
1165{
1166 unsigned long i;
1167 TIMEOUT_PARAM tp;
1168
1169 tp.ctx = s;
1170 tp.cache = s->sessions;
1171 if (tp.cache == NULL)
1172 return;
1173 tp.time = t;
1174 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
1175 i = CHECKED_LHASH_OF(SSL_SESSION, tp.cache)->down_load;
1176 CHECKED_LHASH_OF(SSL_SESSION, tp.cache)->down_load = 0;
1177 lh_SSL_SESSION_doall_arg(tp.cache, timeout_LHASH_DOALL_ARG,
1178 TIMEOUT_PARAM, &tp);
1179 CHECKED_LHASH_OF(SSL_SESSION, tp.cache)->down_load = i;
1180 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
1181}
1182LSSL_ALIAS(SSL_CTX_flush_sessions);
1183
1184int
1185ssl_clear_bad_session(SSL *s)
1186{
1187 if ((s->session != NULL) && !(s->shutdown & SSL_SENT_SHUTDOWN) &&
1188 !(SSL_in_init(s) || SSL_in_before(s))) {
1189 SSL_CTX_remove_session(s->ctx, s->session);
1190 return (1);
1191 } else
1192 return (0);
1193}
1194
1195/* locked by SSL_CTX in the calling function */
1196static void
1197SSL_SESSION_list_remove(SSL_CTX *ctx, SSL_SESSION *s)
1198{
1199 if (s->next == NULL || s->prev == NULL)
1200 return;
1201
1202 if (s->next == (SSL_SESSION *)&(ctx->session_cache_tail)) {
1203 /* last element in list */
1204 if (s->prev == (SSL_SESSION *)&(ctx->session_cache_head)) {
1205 /* only one element in list */
1206 ctx->session_cache_head = NULL;
1207 ctx->session_cache_tail = NULL;
1208 } else {
1209 ctx->session_cache_tail = s->prev;
1210 s->prev->next =
1211 (SSL_SESSION *)&(ctx->session_cache_tail);
1212 }
1213 } else {
1214 if (s->prev == (SSL_SESSION *)&(ctx->session_cache_head)) {
1215 /* first element in list */
1216 ctx->session_cache_head = s->next;
1217 s->next->prev =
1218 (SSL_SESSION *)&(ctx->session_cache_head);
1219 } else {
1220 /* middle of list */
1221 s->next->prev = s->prev;
1222 s->prev->next = s->next;
1223 }
1224 }
1225 s->prev = s->next = NULL;
1226}
1227
1228static void
1229SSL_SESSION_list_add(SSL_CTX *ctx, SSL_SESSION *s)
1230{
1231 if (s->next != NULL && s->prev != NULL)
1232 SSL_SESSION_list_remove(ctx, s);
1233
1234 if (ctx->session_cache_head == NULL) {
1235 ctx->session_cache_head = s;
1236 ctx->session_cache_tail = s;
1237 s->prev = (SSL_SESSION *)&(ctx->session_cache_head);
1238 s->next = (SSL_SESSION *)&(ctx->session_cache_tail);
1239 } else {
1240 s->next = ctx->session_cache_head;
1241 s->next->prev = s;
1242 s->prev = (SSL_SESSION *)&(ctx->session_cache_head);
1243 ctx->session_cache_head = s;
1244 }
1245}
1246
1247void
1248SSL_CTX_sess_set_new_cb(SSL_CTX *ctx,
1249 int (*cb)(struct ssl_st *ssl, SSL_SESSION *sess)) {
1250 ctx->new_session_cb = cb;
1251}
1252LSSL_ALIAS(SSL_CTX_sess_set_new_cb);
1253
1254int
1255(*SSL_CTX_sess_get_new_cb(SSL_CTX *ctx))(SSL *ssl, SSL_SESSION *sess)
1256{
1257 return ctx->new_session_cb;
1258}
1259LSSL_ALIAS(SSL_CTX_sess_get_new_cb);
1260
1261void
1262SSL_CTX_sess_set_remove_cb(SSL_CTX *ctx,
1263 void (*cb)(SSL_CTX *ctx, SSL_SESSION *sess))
1264{
1265 ctx->remove_session_cb = cb;
1266}
1267LSSL_ALIAS(SSL_CTX_sess_set_remove_cb);
1268
1269void
1270(*SSL_CTX_sess_get_remove_cb(SSL_CTX *ctx))(SSL_CTX * ctx, SSL_SESSION *sess)
1271{
1272 return ctx->remove_session_cb;
1273}
1274LSSL_ALIAS(SSL_CTX_sess_get_remove_cb);
1275
1276void
1277SSL_CTX_sess_set_get_cb(SSL_CTX *ctx, SSL_SESSION *(*cb)(struct ssl_st *ssl,
1278 const unsigned char *data, int len, int *copy))
1279{
1280 ctx->get_session_cb = cb;
1281}
1282LSSL_ALIAS(SSL_CTX_sess_set_get_cb);
1283
1284SSL_SESSION *
1285(*SSL_CTX_sess_get_get_cb(SSL_CTX *ctx))(SSL *ssl, const unsigned char *data,
1286 int len, int *copy)
1287{
1288 return ctx->get_session_cb;
1289}
1290LSSL_ALIAS(SSL_CTX_sess_get_get_cb);
1291
1292void
1293SSL_CTX_set_info_callback(SSL_CTX *ctx,
1294 void (*cb)(const SSL *ssl, int type, int val))
1295{
1296 ctx->info_callback = cb;
1297}
1298LSSL_ALIAS(SSL_CTX_set_info_callback);
1299
1300void
1301(*SSL_CTX_get_info_callback(SSL_CTX *ctx))(const SSL *ssl, int type, int val)
1302{
1303 return ctx->info_callback;
1304}
1305LSSL_ALIAS(SSL_CTX_get_info_callback);
1306
1307void
1308SSL_CTX_set_client_cert_cb(SSL_CTX *ctx,
1309 int (*cb)(SSL *ssl, X509 **x509, EVP_PKEY **pkey))
1310{
1311 ctx->client_cert_cb = cb;
1312}
1313LSSL_ALIAS(SSL_CTX_set_client_cert_cb);
1314
1315int
1316(*SSL_CTX_get_client_cert_cb(SSL_CTX *ctx))(SSL * ssl, X509 ** x509,
1317 EVP_PKEY **pkey)
1318{
1319 return ctx->client_cert_cb;
1320}
1321LSSL_ALIAS(SSL_CTX_get_client_cert_cb);
1322
1323#ifndef OPENSSL_NO_ENGINE
1324int
1325SSL_CTX_set_client_cert_engine(SSL_CTX *ctx, ENGINE *e)
1326{
1327 if (!ENGINE_init(e)) {
1328 SSLerrorx(ERR_R_ENGINE_LIB);
1329 return 0;
1330 }
1331 if (!ENGINE_get_ssl_client_cert_function(e)) {
1332 SSLerrorx(SSL_R_NO_CLIENT_CERT_METHOD);
1333 ENGINE_finish(e);
1334 return 0;
1335 }
1336 ctx->client_cert_engine = e;
1337 return 1;
1338}
1339LSSL_ALIAS(SSL_CTX_set_client_cert_engine);
1340#endif
1341
1342void
1343SSL_CTX_set_cookie_generate_cb(SSL_CTX *ctx,
1344 int (*cb)(SSL *ssl, unsigned char *cookie, unsigned int *cookie_len))
1345{
1346 ctx->app_gen_cookie_cb = cb;
1347}
1348LSSL_ALIAS(SSL_CTX_set_cookie_generate_cb);
1349
1350void
1351SSL_CTX_set_cookie_verify_cb(SSL_CTX *ctx,
1352 int (*cb)(SSL *ssl, const unsigned char *cookie, unsigned int cookie_len))
1353{
1354 ctx->app_verify_cookie_cb = cb;
1355}
1356LSSL_ALIAS(SSL_CTX_set_cookie_verify_cb);
1357
1358int
1359PEM_write_SSL_SESSION(FILE *fp, SSL_SESSION *x)
1360{
1361 return PEM_ASN1_write((i2d_of_void *)i2d_SSL_SESSION,
1362 PEM_STRING_SSL_SESSION, fp, x, NULL, NULL, 0, NULL, NULL);
1363}
1364LSSL_ALIAS(PEM_write_SSL_SESSION);
1365
1366SSL_SESSION *
1367PEM_read_SSL_SESSION(FILE *fp, SSL_SESSION **x, pem_password_cb *cb, void *u)
1368{
1369 return PEM_ASN1_read((d2i_of_void *)d2i_SSL_SESSION,
1370 PEM_STRING_SSL_SESSION, fp, (void **)x, cb, u);
1371}
1372LSSL_ALIAS(PEM_read_SSL_SESSION);
1373
1374SSL_SESSION *
1375PEM_read_bio_SSL_SESSION(BIO *bp, SSL_SESSION **x, pem_password_cb *cb, void *u)
1376{
1377 return PEM_ASN1_read_bio((d2i_of_void *)d2i_SSL_SESSION,
1378 PEM_STRING_SSL_SESSION, bp, (void **)x, cb, u);
1379}
1380LSSL_ALIAS(PEM_read_bio_SSL_SESSION);
1381
1382int
1383PEM_write_bio_SSL_SESSION(BIO *bp, SSL_SESSION *x)
1384{
1385 return PEM_ASN1_write_bio((i2d_of_void *)i2d_SSL_SESSION,
1386 PEM_STRING_SSL_SESSION, bp, x, NULL, NULL, 0, NULL, NULL);
1387}
1388LSSL_ALIAS(PEM_write_bio_SSL_SESSION);
generated by cgit v1.2.3-55-g6feb (git 2.39.1) at 2026-02-12 22:31:09 +0000