1 /* $OpenBSD: ssl_sess.c,v 1.117 2022/08/17 07:39:19 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 #include <openssl/opensslconf.h>
140
141 #ifndef OPENSSL_NO_ENGINE
142 #include <openssl/engine.h>
143 #endif
144
145 #include "ssl_locl.h"
146
147 static void SSL_SESSION_list_remove(SSL_CTX *ctx, SSL_SESSION *s);
148 static void SSL_SESSION_list_add(SSL_CTX *ctx, SSL_SESSION *s);
149 static 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 */
152 SSL_SESSION *
SSL_get_session(const SSL * ssl)153 SSL_get_session(const SSL *ssl)
154 {
155 return (ssl->session);
156 }
157
158 /* variant of SSL_get_session: caller really gets something */
159 SSL_SESSION *
SSL_get1_session(SSL * ssl)160 SSL_get1_session(SSL *ssl)
161 {
162 SSL_SESSION *sess;
163
164 /*
165 * Need to lock this all up rather than just use CRYPTO_add so that
166 * somebody doesn't free ssl->session between when we check it's
167 * non-null and when we up the reference count.
168 */
169 CRYPTO_w_lock(CRYPTO_LOCK_SSL_SESSION);
170 sess = ssl->session;
171 if (sess)
172 sess->references++;
173 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_SESSION);
174
175 return (sess);
176 }
177
178 int
SSL_SESSION_get_ex_new_index(long argl,void * argp,CRYPTO_EX_new * new_func,CRYPTO_EX_dup * dup_func,CRYPTO_EX_free * free_func)179 SSL_SESSION_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
180 CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func)
181 {
182 return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL_SESSION,
183 argl, argp, new_func, dup_func, free_func);
184 }
185
186 int
SSL_SESSION_set_ex_data(SSL_SESSION * s,int idx,void * arg)187 SSL_SESSION_set_ex_data(SSL_SESSION *s, int idx, void *arg)
188 {
189 return (CRYPTO_set_ex_data(&s->ex_data, idx, arg));
190 }
191
192 void *
SSL_SESSION_get_ex_data(const SSL_SESSION * s,int idx)193 SSL_SESSION_get_ex_data(const SSL_SESSION *s, int idx)
194 {
195 return (CRYPTO_get_ex_data(&s->ex_data, idx));
196 }
197
198 uint32_t
SSL_SESSION_get_max_early_data(const SSL_SESSION * s)199 SSL_SESSION_get_max_early_data(const SSL_SESSION *s)
200 {
201 return 0;
202 }
203
204 int
SSL_SESSION_set_max_early_data(SSL_SESSION * s,uint32_t max_early_data)205 SSL_SESSION_set_max_early_data(SSL_SESSION *s, uint32_t max_early_data)
206 {
207 return 1;
208 }
209
210 SSL_SESSION *
SSL_SESSION_new(void)211 SSL_SESSION_new(void)
212 {
213 SSL_SESSION *ss;
214
215 if (!OPENSSL_init_ssl(0, NULL)) {
216 SSLerrorx(SSL_R_LIBRARY_BUG);
217 return(NULL);
218 }
219
220 if ((ss = calloc(1, sizeof(*ss))) == NULL) {
221 SSLerrorx(ERR_R_MALLOC_FAILURE);
222 return (NULL);
223 }
224
225 ss->verify_result = 1; /* avoid 0 (= X509_V_OK) just in case */
226 ss->references = 1;
227 ss->timeout = 60 * 5 + 4; /* 5 minutes 4 seconds timeout by default */
228 ss->time = time(NULL);
229 ss->prev = NULL;
230 ss->next = NULL;
231 ss->tlsext_hostname = NULL;
232
233 ss->peer_cert_type = -1;
234
235 ss->tlsext_ecpointformatlist_length = 0;
236 ss->tlsext_ecpointformatlist = NULL;
237 ss->tlsext_supportedgroups_length = 0;
238 ss->tlsext_supportedgroups = NULL;
239
240 CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_SESSION, ss, &ss->ex_data);
241
242 return (ss);
243 }
244
245 const unsigned char *
SSL_SESSION_get_id(const SSL_SESSION * ss,unsigned int * len)246 SSL_SESSION_get_id(const SSL_SESSION *ss, unsigned int *len)
247 {
248 if (len != NULL)
249 *len = (unsigned int)ss->session_id_length;
250 return ss->session_id;
251 }
252
253 const unsigned char *
SSL_SESSION_get0_id_context(const SSL_SESSION * ss,unsigned int * len)254 SSL_SESSION_get0_id_context(const SSL_SESSION *ss, unsigned int *len)
255 {
256 if (len != NULL)
257 *len = (unsigned int)ss->sid_ctx_length;
258 return ss->sid_ctx;
259 }
260
261 unsigned int
SSL_SESSION_get_compress_id(const SSL_SESSION * ss)262 SSL_SESSION_get_compress_id(const SSL_SESSION *ss)
263 {
264 return 0;
265 }
266
267 unsigned long
SSL_SESSION_get_ticket_lifetime_hint(const SSL_SESSION * s)268 SSL_SESSION_get_ticket_lifetime_hint(const SSL_SESSION *s)
269 {
270 return s->tlsext_tick_lifetime_hint;
271 }
272
273 int
SSL_SESSION_has_ticket(const SSL_SESSION * s)274 SSL_SESSION_has_ticket(const SSL_SESSION *s)
275 {
276 return (s->tlsext_ticklen > 0) ? 1 : 0;
277 }
278
279 /*
280 * SSLv3/TLSv1 has 32 bytes (256 bits) of session ID space. As such, filling
281 * the ID with random gunk repeatedly until we have no conflict is going to
282 * complete in one iteration pretty much "most" of the time (btw:
283 * understatement). So, if it takes us 10 iterations and we still can't avoid
284 * a conflict - well that's a reasonable point to call it quits. Either the
285 * arc4random code is broken or someone is trying to open roughly very close to
286 * 2^128 (or 2^256) SSL sessions to our server. How you might store that many
287 * sessions is perhaps a more interesting question...
288 */
289
290 #define MAX_SESS_ID_ATTEMPTS 10
291
292 static int
def_generate_session_id(const SSL * ssl,unsigned char * id,unsigned int * id_len)293 def_generate_session_id(const SSL *ssl, unsigned char *id, unsigned int *id_len)
294 {
295 unsigned int retry = 0;
296
297 do {
298 arc4random_buf(id, *id_len);
299 } while (SSL_has_matching_session_id(ssl, id, *id_len) &&
300 (++retry < MAX_SESS_ID_ATTEMPTS));
301
302 if (retry < MAX_SESS_ID_ATTEMPTS)
303 return 1;
304
305 /* else - woops a session_id match */
306 /* XXX We should also check the external cache --
307 * but the probability of a collision is negligible, and
308 * we could not prevent the concurrent creation of sessions
309 * with identical IDs since we currently don't have means
310 * to atomically check whether a session ID already exists
311 * and make a reservation for it if it does not
312 * (this problem applies to the internal cache as well).
313 */
314 return 0;
315 }
316
317 int
ssl_get_new_session(SSL * s,int session)318 ssl_get_new_session(SSL *s, int session)
319 {
320 unsigned int tmp;
321 SSL_SESSION *ss = NULL;
322 GEN_SESSION_CB cb = def_generate_session_id;
323
324 /* This gets used by clients and servers. */
325
326 if ((ss = SSL_SESSION_new()) == NULL)
327 return (0);
328
329 /* If the context has a default timeout, use it */
330 if (s->session_ctx->session_timeout == 0)
331 ss->timeout = SSL_get_default_timeout(s);
332 else
333 ss->timeout = s->session_ctx->session_timeout;
334
335 if (s->session != NULL) {
336 SSL_SESSION_free(s->session);
337 s->session = NULL;
338 }
339
340 if (session) {
341 switch (s->version) {
342 case TLS1_VERSION:
343 case TLS1_1_VERSION:
344 case TLS1_2_VERSION:
345 case DTLS1_VERSION:
346 case DTLS1_2_VERSION:
347 ss->ssl_version = s->version;
348 ss->session_id_length = SSL3_SSL_SESSION_ID_LENGTH;
349 break;
350 default:
351 SSLerror(s, SSL_R_UNSUPPORTED_SSL_VERSION);
352 SSL_SESSION_free(ss);
353 return (0);
354 }
355
356 /* If RFC4507 ticket use empty session ID. */
357 if (s->internal->tlsext_ticket_expected) {
358 ss->session_id_length = 0;
359 goto sess_id_done;
360 }
361
362 /* Choose which callback will set the session ID. */
363 CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);
364 if (s->internal->generate_session_id)
365 cb = s->internal->generate_session_id;
366 else if (s->session_ctx->internal->generate_session_id)
367 cb = s->session_ctx->internal->generate_session_id;
368 CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
369
370 /* Choose a session ID. */
371 tmp = ss->session_id_length;
372 if (!cb(s, ss->session_id, &tmp)) {
373 /* The callback failed */
374 SSLerror(s, SSL_R_SSL_SESSION_ID_CALLBACK_FAILED);
375 SSL_SESSION_free(ss);
376 return (0);
377 }
378
379 /*
380 * Don't allow the callback to set the session length to zero.
381 * nor set it higher than it was.
382 */
383 if (tmp == 0 || tmp > ss->session_id_length) {
384 /* The callback set an illegal length */
385 SSLerror(s, SSL_R_SSL_SESSION_ID_HAS_BAD_LENGTH);
386 SSL_SESSION_free(ss);
387 return (0);
388 }
389 ss->session_id_length = tmp;
390
391 /* Finally, check for a conflict. */
392 if (SSL_has_matching_session_id(s, ss->session_id,
393 ss->session_id_length)) {
394 SSLerror(s, SSL_R_SSL_SESSION_ID_CONFLICT);
395 SSL_SESSION_free(ss);
396 return (0);
397 }
398
399 sess_id_done:
400 if (s->tlsext_hostname) {
401 ss->tlsext_hostname = strdup(s->tlsext_hostname);
402 if (ss->tlsext_hostname == NULL) {
403 SSLerror(s, ERR_R_INTERNAL_ERROR);
404 SSL_SESSION_free(ss);
405 return 0;
406 }
407 }
408 } else {
409 ss->session_id_length = 0;
410 }
411
412 if (s->sid_ctx_length > sizeof ss->sid_ctx) {
413 SSLerror(s, ERR_R_INTERNAL_ERROR);
414 SSL_SESSION_free(ss);
415 return 0;
416 }
417
418 memcpy(ss->sid_ctx, s->sid_ctx, s->sid_ctx_length);
419 ss->sid_ctx_length = s->sid_ctx_length;
420 s->session = ss;
421 ss->ssl_version = s->version;
422 ss->verify_result = X509_V_OK;
423
424 return (1);
425 }
426
427 static SSL_SESSION *
ssl_session_from_cache(SSL * s,CBS * session_id)428 ssl_session_from_cache(SSL *s, CBS *session_id)
429 {
430 SSL_SESSION *sess;
431 SSL_SESSION data;
432
433 if ((s->session_ctx->internal->session_cache_mode &
434 SSL_SESS_CACHE_NO_INTERNAL_LOOKUP))
435 return NULL;
436
437 memset(&data, 0, sizeof(data));
438
439 data.ssl_version = s->version;
440
441 if (!CBS_write_bytes(session_id, data.session_id,
442 sizeof(data.session_id), &data.session_id_length))
443 return NULL;
444
445 CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);
446 sess = lh_SSL_SESSION_retrieve(s->session_ctx->internal->sessions, &data);
447 if (sess != NULL)
448 CRYPTO_add(&sess->references, 1, CRYPTO_LOCK_SSL_SESSION);
449 CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
450
451 if (sess == NULL)
452 s->session_ctx->internal->stats.sess_miss++;
453
454 return sess;
455 }
456
457 static SSL_SESSION *
ssl_session_from_callback(SSL * s,CBS * session_id)458 ssl_session_from_callback(SSL *s, CBS *session_id)
459 {
460 SSL_SESSION *sess;
461 int copy;
462
463 if (s->session_ctx->internal->get_session_cb == NULL)
464 return NULL;
465
466 copy = 1;
467 if ((sess = s->session_ctx->internal->get_session_cb(s,
468 CBS_data(session_id), CBS_len(session_id), ©)) == NULL)
469 return NULL;
470 /*
471 * The copy handler may have set copy == 0 to indicate that the session
472 * structures are shared between threads and that it handles the
473 * reference count itself. If it didn't set copy to zero, we must
474 * increment the reference count.
475 */
476 if (copy)
477 CRYPTO_add(&sess->references, 1, CRYPTO_LOCK_SSL_SESSION);
478
479 s->session_ctx->internal->stats.sess_cb_hit++;
480
481 /* Add the externally cached session to the internal cache as well. */
482 if (!(s->session_ctx->internal->session_cache_mode &
483 SSL_SESS_CACHE_NO_INTERNAL_STORE)) {
484 /*
485 * The following should not return 1,
486 * otherwise, things are very strange.
487 */
488 SSL_CTX_add_session(s->session_ctx, sess);
489 }
490
491 return sess;
492 }
493
494 static SSL_SESSION *
ssl_session_by_id(SSL * s,CBS * session_id)495 ssl_session_by_id(SSL *s, CBS *session_id)
496 {
497 SSL_SESSION *sess;
498
499 if (CBS_len(session_id) == 0)
500 return NULL;
501
502 if ((sess = ssl_session_from_cache(s, session_id)) == NULL)
503 sess = ssl_session_from_callback(s, session_id);
504
505 return sess;
506 }
507
508 /*
509 * ssl_get_prev_session attempts to find an SSL_SESSION to be used to resume
510 * this connection. It is only called by servers.
511 *
512 * session_id: points at the session ID in the ClientHello. This code will
513 * read past the end of this in order to parse out the session ticket
514 * extension, if any.
515 * ext_block: a CBS for the ClientHello extensions block.
516 * alert: alert that the caller should send in case of failure.
517 *
518 * Returns:
519 * -1: error
520 * 0: a session may have been found.
521 *
522 * Side effects:
523 * - If a session is found then s->session is pointed at it (after freeing
524 * an existing session if need be) and s->verify_result is set from the
525 * session.
526 * - For both new and resumed sessions, s->internal->tlsext_ticket_expected
527 * indicates whether the server should issue a new session ticket or not.
528 */
529 int
ssl_get_prev_session(SSL * s,CBS * session_id,CBS * ext_block,int * alert)530 ssl_get_prev_session(SSL *s, CBS *session_id, CBS *ext_block, int *alert)
531 {
532 SSL_SESSION *sess = NULL;
533 int alert_desc = SSL_AD_INTERNAL_ERROR, fatal = 0;
534 int ticket_decrypted = 0;
535
536 /* This is used only by servers. */
537
538 if (CBS_len(session_id) > SSL_MAX_SSL_SESSION_ID_LENGTH)
539 goto err;
540
541 /* Sets s->internal->tlsext_ticket_expected. */
542 switch (tls1_process_ticket(s, ext_block, &alert_desc, &sess)) {
543 case TLS1_TICKET_FATAL_ERROR:
544 fatal = 1;
545 goto err;
546 case TLS1_TICKET_NONE:
547 case TLS1_TICKET_EMPTY:
548 if ((sess = ssl_session_by_id(s, session_id)) == NULL)
549 goto err;
550 break;
551 case TLS1_TICKET_NOT_DECRYPTED:
552 goto err;
553 case TLS1_TICKET_DECRYPTED:
554 ticket_decrypted = 1;
555
556 /*
557 * The session ID is used by some clients to detect that the
558 * ticket has been accepted so we copy it into sess.
559 */
560 if (!CBS_write_bytes(session_id, sess->session_id,
561 sizeof(sess->session_id), &sess->session_id_length)) {
562 fatal = 1;
563 goto err;
564 }
565 break;
566 default:
567 SSLerror(s, ERR_R_INTERNAL_ERROR);
568 fatal = 1;
569 goto err;
570 }
571
572 /* Now sess is non-NULL and we own one of its reference counts. */
573
574 if (sess->sid_ctx_length != s->sid_ctx_length ||
575 timingsafe_memcmp(sess->sid_ctx, s->sid_ctx,
576 sess->sid_ctx_length) != 0) {
577 /*
578 * We have the session requested by the client, but we don't
579 * want to use it in this context. Treat it like a cache miss.
580 */
581 goto err;
582 }
583
584 if ((s->verify_mode & SSL_VERIFY_PEER) && s->sid_ctx_length == 0) {
585 /*
586 * We can't be sure if this session is being used out of
587 * context, which is especially important for SSL_VERIFY_PEER.
588 * The application should have used
589 * SSL[_CTX]_set_session_id_context.
590 *
591 * For this error case, we generate an error instead of treating
592 * the event like a cache miss (otherwise it would be easy for
593 * applications to effectively disable the session cache by
594 * accident without anyone noticing).
595 */
596 SSLerror(s, SSL_R_SESSION_ID_CONTEXT_UNINITIALIZED);
597 fatal = 1;
598 goto err;
599 }
600
601 if (sess->cipher == NULL) {
602 sess->cipher = ssl3_get_cipher_by_id(sess->cipher_id);
603 if (sess->cipher == NULL)
604 goto err;
605 }
606
607 if (sess->timeout < (time(NULL) - sess->time)) {
608 s->session_ctx->internal->stats.sess_timeout++;
609 if (!ticket_decrypted) {
610 /* The session was from the cache, so remove it. */
611 SSL_CTX_remove_session(s->session_ctx, sess);
612 }
613 goto err;
614 }
615
616 s->session_ctx->internal->stats.sess_hit++;
617
618 SSL_SESSION_free(s->session);
619 s->session = sess;
620 s->verify_result = s->session->verify_result;
621
622 return 1;
623
624 err:
625 SSL_SESSION_free(sess);
626 if (ticket_decrypted) {
627 /*
628 * The session was from a ticket. Issue a ticket for the new
629 * session.
630 */
631 s->internal->tlsext_ticket_expected = 1;
632 }
633 if (fatal) {
634 *alert = alert_desc;
635 return -1;
636 }
637 return 0;
638 }
639
640 int
SSL_CTX_add_session(SSL_CTX * ctx,SSL_SESSION * c)641 SSL_CTX_add_session(SSL_CTX *ctx, SSL_SESSION *c)
642 {
643 int ret = 0;
644 SSL_SESSION *s;
645
646 /*
647 * Add just 1 reference count for the SSL_CTX's session cache
648 * even though it has two ways of access: each session is in a
649 * doubly linked list and an lhash.
650 */
651 CRYPTO_add(&c->references, 1, CRYPTO_LOCK_SSL_SESSION);
652
653 /*
654 * If session c is in already in cache, we take back the increment
655 * later.
656 */
657 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
658 s = lh_SSL_SESSION_insert(ctx->internal->sessions, c);
659
660 /*
661 * s != NULL iff we already had a session with the given PID.
662 * In this case, s == c should hold (then we did not really modify
663 * ctx->internal->sessions), or we're in trouble.
664 */
665 if (s != NULL && s != c) {
666 /* We *are* in trouble ... */
667 SSL_SESSION_list_remove(ctx, s);
668 SSL_SESSION_free(s);
669 /*
670 * ... so pretend the other session did not exist in cache
671 * (we cannot handle two SSL_SESSION structures with identical
672 * session ID in the same cache, which could happen e.g. when
673 * two threads concurrently obtain the same session from an
674 * external cache).
675 */
676 s = NULL;
677 }
678
679 /* Put at the head of the queue unless it is already in the cache */
680 if (s == NULL)
681 SSL_SESSION_list_add(ctx, c);
682
683 if (s != NULL) {
684 /*
685 * existing cache entry -- decrement previously incremented
686 * reference count because it already takes into account the
687 * cache.
688 */
689 SSL_SESSION_free(s); /* s == c */
690 ret = 0;
691 } else {
692 /*
693 * New cache entry -- remove old ones if cache has become
694 * too large.
695 */
696
697 ret = 1;
698
699 if (SSL_CTX_sess_get_cache_size(ctx) > 0) {
700 while (SSL_CTX_sess_number(ctx) >
701 SSL_CTX_sess_get_cache_size(ctx)) {
702 if (!remove_session_lock(ctx,
703 ctx->internal->session_cache_tail, 0))
704 break;
705 else
706 ctx->internal->stats.sess_cache_full++;
707 }
708 }
709 }
710 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
711 return (ret);
712 }
713
714 int
SSL_CTX_remove_session(SSL_CTX * ctx,SSL_SESSION * c)715 SSL_CTX_remove_session(SSL_CTX *ctx, SSL_SESSION *c)
716 {
717 return remove_session_lock(ctx, c, 1);
718 }
719
720 static int
remove_session_lock(SSL_CTX * ctx,SSL_SESSION * c,int lck)721 remove_session_lock(SSL_CTX *ctx, SSL_SESSION *c, int lck)
722 {
723 SSL_SESSION *r;
724 int ret = 0;
725
726 if (c == NULL || c->session_id_length == 0)
727 return 0;
728
729 if (lck)
730 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
731 if ((r = lh_SSL_SESSION_retrieve(ctx->internal->sessions, c)) == c) {
732 ret = 1;
733 r = lh_SSL_SESSION_delete(ctx->internal->sessions, c);
734 SSL_SESSION_list_remove(ctx, c);
735 }
736 if (lck)
737 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
738
739 if (ret) {
740 r->not_resumable = 1;
741 if (ctx->internal->remove_session_cb != NULL)
742 ctx->internal->remove_session_cb(ctx, r);
743 SSL_SESSION_free(r);
744 }
745
746 return ret;
747 }
748
749 void
SSL_SESSION_free(SSL_SESSION * ss)750 SSL_SESSION_free(SSL_SESSION *ss)
751 {
752 int i;
753
754 if (ss == NULL)
755 return;
756
757 i = CRYPTO_add(&ss->references, -1, CRYPTO_LOCK_SSL_SESSION);
758 if (i > 0)
759 return;
760
761 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_SESSION, ss, &ss->ex_data);
762
763 explicit_bzero(ss->master_key, sizeof ss->master_key);
764 explicit_bzero(ss->session_id, sizeof ss->session_id);
765
766 X509_free(ss->peer_cert);
767
768 sk_SSL_CIPHER_free(ss->ciphers);
769
770 free(ss->tlsext_hostname);
771 free(ss->tlsext_tick);
772 free(ss->tlsext_ecpointformatlist);
773 free(ss->tlsext_supportedgroups);
774
775 freezero(ss, sizeof(*ss));
776 }
777
778 int
SSL_SESSION_up_ref(SSL_SESSION * ss)779 SSL_SESSION_up_ref(SSL_SESSION *ss)
780 {
781 int refs = CRYPTO_add(&ss->references, 1, CRYPTO_LOCK_SSL_SESSION);
782 return (refs > 1) ? 1 : 0;
783 }
784
785 int
SSL_set_session(SSL * s,SSL_SESSION * session)786 SSL_set_session(SSL *s, SSL_SESSION *session)
787 {
788 const SSL_METHOD *method;
789
790 if (session == NULL) {
791 SSL_SESSION_free(s->session);
792 s->session = NULL;
793
794 return SSL_set_ssl_method(s, s->ctx->method);
795 }
796
797 if ((method = ssl_get_method(session->ssl_version)) == NULL) {
798 SSLerror(s, SSL_R_UNABLE_TO_FIND_SSL_METHOD);
799 return (0);
800 }
801
802 if (!SSL_set_ssl_method(s, method))
803 return (0);
804
805 CRYPTO_add(&session->references, 1, CRYPTO_LOCK_SSL_SESSION);
806 SSL_SESSION_free(s->session);
807 s->session = session;
808 s->verify_result = s->session->verify_result;
809
810 return (1);
811 }
812
813 size_t
SSL_SESSION_get_master_key(const SSL_SESSION * ss,unsigned char * out,size_t max_out)814 SSL_SESSION_get_master_key(const SSL_SESSION *ss, unsigned char *out,
815 size_t max_out)
816 {
817 size_t len = ss->master_key_length;
818
819 if (out == NULL)
820 return len;
821
822 if (len > max_out)
823 len = max_out;
824
825 memcpy(out, ss->master_key, len);
826
827 return len;
828 }
829
830 long
SSL_SESSION_set_timeout(SSL_SESSION * s,long t)831 SSL_SESSION_set_timeout(SSL_SESSION *s, long t)
832 {
833 if (s == NULL)
834 return (0);
835 s->timeout = t;
836 return (1);
837 }
838
839 long
SSL_SESSION_get_timeout(const SSL_SESSION * s)840 SSL_SESSION_get_timeout(const SSL_SESSION *s)
841 {
842 if (s == NULL)
843 return (0);
844 return (s->timeout);
845 }
846
847 /* XXX 2038 */
848 long
SSL_SESSION_get_time(const SSL_SESSION * s)849 SSL_SESSION_get_time(const SSL_SESSION *s)
850 {
851 if (s == NULL)
852 return (0);
853 return (s->time);
854 }
855
856 /* XXX 2038 */
857 long
SSL_SESSION_set_time(SSL_SESSION * s,long t)858 SSL_SESSION_set_time(SSL_SESSION *s, long t)
859 {
860 if (s == NULL)
861 return (0);
862 s->time = t;
863 return (t);
864 }
865
866 int
SSL_SESSION_get_protocol_version(const SSL_SESSION * s)867 SSL_SESSION_get_protocol_version(const SSL_SESSION *s)
868 {
869 return s->ssl_version;
870 }
871
872 const SSL_CIPHER *
SSL_SESSION_get0_cipher(const SSL_SESSION * s)873 SSL_SESSION_get0_cipher(const SSL_SESSION *s)
874 {
875 return s->cipher;
876 }
877
878 X509 *
SSL_SESSION_get0_peer(SSL_SESSION * s)879 SSL_SESSION_get0_peer(SSL_SESSION *s)
880 {
881 return s->peer_cert;
882 }
883
884 int
SSL_SESSION_set1_id(SSL_SESSION * s,const unsigned char * sid,unsigned int sid_len)885 SSL_SESSION_set1_id(SSL_SESSION *s, const unsigned char *sid,
886 unsigned int sid_len)
887 {
888 if (sid_len > SSL_MAX_SSL_SESSION_ID_LENGTH) {
889 SSLerrorx(SSL_R_SSL_SESSION_ID_TOO_LONG);
890 return 0;
891 }
892 s->session_id_length = sid_len;
893 memmove(s->session_id, sid, sid_len);
894 return 1;
895 }
896
897 int
SSL_SESSION_set1_id_context(SSL_SESSION * s,const unsigned char * sid_ctx,unsigned int sid_ctx_len)898 SSL_SESSION_set1_id_context(SSL_SESSION *s, const unsigned char *sid_ctx,
899 unsigned int sid_ctx_len)
900 {
901 if (sid_ctx_len > SSL_MAX_SID_CTX_LENGTH) {
902 SSLerrorx(SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
903 return 0;
904 }
905 s->sid_ctx_length = sid_ctx_len;
906 memcpy(s->sid_ctx, sid_ctx, sid_ctx_len);
907
908 return 1;
909 }
910
911 int
SSL_SESSION_is_resumable(const SSL_SESSION * s)912 SSL_SESSION_is_resumable(const SSL_SESSION *s)
913 {
914 return 0;
915 }
916
917 long
SSL_CTX_set_timeout(SSL_CTX * s,long t)918 SSL_CTX_set_timeout(SSL_CTX *s, long t)
919 {
920 long l;
921
922 if (s == NULL)
923 return (0);
924 l = s->session_timeout;
925 s->session_timeout = t;
926
927 return (l);
928 }
929
930 long
SSL_CTX_get_timeout(const SSL_CTX * s)931 SSL_CTX_get_timeout(const SSL_CTX *s)
932 {
933 if (s == NULL)
934 return (0);
935 return (s->session_timeout);
936 }
937
938 int
SSL_set_session_secret_cb(SSL * s,int (* tls_session_secret_cb)(SSL * s,void * secret,int * secret_len,STACK_OF (SSL_CIPHER)* peer_ciphers,SSL_CIPHER ** cipher,void * arg),void * arg)939 SSL_set_session_secret_cb(SSL *s, int (*tls_session_secret_cb)(SSL *s,
940 void *secret, int *secret_len, STACK_OF(SSL_CIPHER) *peer_ciphers,
941 SSL_CIPHER **cipher, void *arg), void *arg)
942 {
943 if (s == NULL)
944 return (0);
945 s->internal->tls_session_secret_cb = tls_session_secret_cb;
946 s->internal->tls_session_secret_cb_arg = arg;
947 return (1);
948 }
949
950 int
SSL_set_session_ticket_ext_cb(SSL * s,tls_session_ticket_ext_cb_fn cb,void * arg)951 SSL_set_session_ticket_ext_cb(SSL *s, tls_session_ticket_ext_cb_fn cb,
952 void *arg)
953 {
954 if (s == NULL)
955 return (0);
956 s->internal->tls_session_ticket_ext_cb = cb;
957 s->internal->tls_session_ticket_ext_cb_arg = arg;
958 return (1);
959 }
960
961 int
SSL_set_session_ticket_ext(SSL * s,void * ext_data,int ext_len)962 SSL_set_session_ticket_ext(SSL *s, void *ext_data, int ext_len)
963 {
964 if (s->version >= TLS1_VERSION) {
965 free(s->internal->tlsext_session_ticket);
966 s->internal->tlsext_session_ticket =
967 malloc(sizeof(TLS_SESSION_TICKET_EXT) + ext_len);
968 if (!s->internal->tlsext_session_ticket) {
969 SSLerror(s, ERR_R_MALLOC_FAILURE);
970 return 0;
971 }
972
973 if (ext_data) {
974 s->internal->tlsext_session_ticket->length = ext_len;
975 s->internal->tlsext_session_ticket->data =
976 s->internal->tlsext_session_ticket + 1;
977 memcpy(s->internal->tlsext_session_ticket->data,
978 ext_data, ext_len);
979 } else {
980 s->internal->tlsext_session_ticket->length = 0;
981 s->internal->tlsext_session_ticket->data = NULL;
982 }
983
984 return 1;
985 }
986
987 return 0;
988 }
989
990 typedef struct timeout_param_st {
991 SSL_CTX *ctx;
992 long time;
993 struct lhash_st_SSL_SESSION *cache;
994 } TIMEOUT_PARAM;
995
996 static void
timeout_doall_arg(SSL_SESSION * s,TIMEOUT_PARAM * p)997 timeout_doall_arg(SSL_SESSION *s, TIMEOUT_PARAM *p)
998 {
999 if ((p->time == 0) || (p->time > (s->time + s->timeout))) {
1000 /* timeout */
1001 /* The reason we don't call SSL_CTX_remove_session() is to
1002 * save on locking overhead */
1003 (void)lh_SSL_SESSION_delete(p->cache, s);
1004 SSL_SESSION_list_remove(p->ctx, s);
1005 s->not_resumable = 1;
1006 if (p->ctx->internal->remove_session_cb != NULL)
1007 p->ctx->internal->remove_session_cb(p->ctx, s);
1008 SSL_SESSION_free(s);
1009 }
1010 }
1011
1012 static void
timeout_LHASH_DOALL_ARG(void * arg1,void * arg2)1013 timeout_LHASH_DOALL_ARG(void *arg1, void *arg2)
1014 {
1015 SSL_SESSION *a = arg1;
1016 TIMEOUT_PARAM *b = arg2;
1017
1018 timeout_doall_arg(a, b);
1019 }
1020
1021 /* XXX 2038 */
1022 void
SSL_CTX_flush_sessions(SSL_CTX * s,long t)1023 SSL_CTX_flush_sessions(SSL_CTX *s, long t)
1024 {
1025 unsigned long i;
1026 TIMEOUT_PARAM tp;
1027
1028 tp.ctx = s;
1029 tp.cache = s->internal->sessions;
1030 if (tp.cache == NULL)
1031 return;
1032 tp.time = t;
1033 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
1034 i = CHECKED_LHASH_OF(SSL_SESSION, tp.cache)->down_load;
1035 CHECKED_LHASH_OF(SSL_SESSION, tp.cache)->down_load = 0;
1036 lh_SSL_SESSION_doall_arg(tp.cache, timeout_LHASH_DOALL_ARG,
1037 TIMEOUT_PARAM, &tp);
1038 CHECKED_LHASH_OF(SSL_SESSION, tp.cache)->down_load = i;
1039 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
1040 }
1041
1042 int
ssl_clear_bad_session(SSL * s)1043 ssl_clear_bad_session(SSL *s)
1044 {
1045 if ((s->session != NULL) && !(s->internal->shutdown & SSL_SENT_SHUTDOWN) &&
1046 !(SSL_in_init(s) || SSL_in_before(s))) {
1047 SSL_CTX_remove_session(s->ctx, s->session);
1048 return (1);
1049 } else
1050 return (0);
1051 }
1052
1053 /* locked by SSL_CTX in the calling function */
1054 static void
SSL_SESSION_list_remove(SSL_CTX * ctx,SSL_SESSION * s)1055 SSL_SESSION_list_remove(SSL_CTX *ctx, SSL_SESSION *s)
1056 {
1057 if (s->next == NULL || s->prev == NULL)
1058 return;
1059
1060 if (s->next == (SSL_SESSION *)&(ctx->internal->session_cache_tail)) {
1061 /* last element in list */
1062 if (s->prev == (SSL_SESSION *)&(ctx->internal->session_cache_head)) {
1063 /* only one element in list */
1064 ctx->internal->session_cache_head = NULL;
1065 ctx->internal->session_cache_tail = NULL;
1066 } else {
1067 ctx->internal->session_cache_tail = s->prev;
1068 s->prev->next =
1069 (SSL_SESSION *)&(ctx->internal->session_cache_tail);
1070 }
1071 } else {
1072 if (s->prev == (SSL_SESSION *)&(ctx->internal->session_cache_head)) {
1073 /* first element in list */
1074 ctx->internal->session_cache_head = s->next;
1075 s->next->prev =
1076 (SSL_SESSION *)&(ctx->internal->session_cache_head);
1077 } else {
1078 /* middle of list */
1079 s->next->prev = s->prev;
1080 s->prev->next = s->next;
1081 }
1082 }
1083 s->prev = s->next = NULL;
1084 }
1085
1086 static void
SSL_SESSION_list_add(SSL_CTX * ctx,SSL_SESSION * s)1087 SSL_SESSION_list_add(SSL_CTX *ctx, SSL_SESSION *s)
1088 {
1089 if (s->next != NULL && s->prev != NULL)
1090 SSL_SESSION_list_remove(ctx, s);
1091
1092 if (ctx->internal->session_cache_head == NULL) {
1093 ctx->internal->session_cache_head = s;
1094 ctx->internal->session_cache_tail = s;
1095 s->prev = (SSL_SESSION *)&(ctx->internal->session_cache_head);
1096 s->next = (SSL_SESSION *)&(ctx->internal->session_cache_tail);
1097 } else {
1098 s->next = ctx->internal->session_cache_head;
1099 s->next->prev = s;
1100 s->prev = (SSL_SESSION *)&(ctx->internal->session_cache_head);
1101 ctx->internal->session_cache_head = s;
1102 }
1103 }
1104
1105 void
SSL_CTX_sess_set_new_cb(SSL_CTX * ctx,int (* cb)(struct ssl_st * ssl,SSL_SESSION * sess))1106 SSL_CTX_sess_set_new_cb(SSL_CTX *ctx,
1107 int (*cb)(struct ssl_st *ssl, SSL_SESSION *sess)) {
1108 ctx->internal->new_session_cb = cb;
1109 }
1110
1111 int
SSL_CTX_sess_get_new_cb(SSL_CTX * ctx)1112 (*SSL_CTX_sess_get_new_cb(SSL_CTX *ctx))(SSL *ssl, SSL_SESSION *sess)
1113 {
1114 return ctx->internal->new_session_cb;
1115 }
1116
1117 void
SSL_CTX_sess_set_remove_cb(SSL_CTX * ctx,void (* cb)(SSL_CTX * ctx,SSL_SESSION * sess))1118 SSL_CTX_sess_set_remove_cb(SSL_CTX *ctx,
1119 void (*cb)(SSL_CTX *ctx, SSL_SESSION *sess))
1120 {
1121 ctx->internal->remove_session_cb = cb;
1122 }
1123
1124 void
SSL_CTX_sess_get_remove_cb(SSL_CTX * ctx)1125 (*SSL_CTX_sess_get_remove_cb(SSL_CTX *ctx))(SSL_CTX * ctx, SSL_SESSION *sess)
1126 {
1127 return ctx->internal->remove_session_cb;
1128 }
1129
1130 void
SSL_CTX_sess_set_get_cb(SSL_CTX * ctx,SSL_SESSION * (* cb)(struct ssl_st * ssl,const unsigned char * data,int len,int * copy))1131 SSL_CTX_sess_set_get_cb(SSL_CTX *ctx, SSL_SESSION *(*cb)(struct ssl_st *ssl,
1132 const unsigned char *data, int len, int *copy))
1133 {
1134 ctx->internal->get_session_cb = cb;
1135 }
1136
1137 SSL_SESSION *
SSL_CTX_sess_get_get_cb(SSL_CTX * ctx)1138 (*SSL_CTX_sess_get_get_cb(SSL_CTX *ctx))(SSL *ssl, const unsigned char *data,
1139 int len, int *copy)
1140 {
1141 return ctx->internal->get_session_cb;
1142 }
1143
1144 void
SSL_CTX_set_info_callback(SSL_CTX * ctx,void (* cb)(const SSL * ssl,int type,int val))1145 SSL_CTX_set_info_callback(SSL_CTX *ctx,
1146 void (*cb)(const SSL *ssl, int type, int val))
1147 {
1148 ctx->internal->info_callback = cb;
1149 }
1150
1151 void
SSL_CTX_get_info_callback(SSL_CTX * ctx)1152 (*SSL_CTX_get_info_callback(SSL_CTX *ctx))(const SSL *ssl, int type, int val)
1153 {
1154 return ctx->internal->info_callback;
1155 }
1156
1157 void
SSL_CTX_set_client_cert_cb(SSL_CTX * ctx,int (* cb)(SSL * ssl,X509 ** x509,EVP_PKEY ** pkey))1158 SSL_CTX_set_client_cert_cb(SSL_CTX *ctx,
1159 int (*cb)(SSL *ssl, X509 **x509, EVP_PKEY **pkey))
1160 {
1161 ctx->internal->client_cert_cb = cb;
1162 }
1163
1164 int
SSL_CTX_get_client_cert_cb(SSL_CTX * ctx)1165 (*SSL_CTX_get_client_cert_cb(SSL_CTX *ctx))(SSL * ssl, X509 ** x509,
1166 EVP_PKEY **pkey)
1167 {
1168 return ctx->internal->client_cert_cb;
1169 }
1170
1171 #ifndef OPENSSL_NO_ENGINE
1172 int
SSL_CTX_set_client_cert_engine(SSL_CTX * ctx,ENGINE * e)1173 SSL_CTX_set_client_cert_engine(SSL_CTX *ctx, ENGINE *e)
1174 {
1175 if (!ENGINE_init(e)) {
1176 SSLerrorx(ERR_R_ENGINE_LIB);
1177 return 0;
1178 }
1179 if (!ENGINE_get_ssl_client_cert_function(e)) {
1180 SSLerrorx(SSL_R_NO_CLIENT_CERT_METHOD);
1181 ENGINE_finish(e);
1182 return 0;
1183 }
1184 ctx->internal->client_cert_engine = e;
1185 return 1;
1186 }
1187 #endif
1188
1189 void
SSL_CTX_set_cookie_generate_cb(SSL_CTX * ctx,int (* cb)(SSL * ssl,unsigned char * cookie,unsigned int * cookie_len))1190 SSL_CTX_set_cookie_generate_cb(SSL_CTX *ctx,
1191 int (*cb)(SSL *ssl, unsigned char *cookie, unsigned int *cookie_len))
1192 {
1193 ctx->internal->app_gen_cookie_cb = cb;
1194 }
1195
1196 void
SSL_CTX_set_cookie_verify_cb(SSL_CTX * ctx,int (* cb)(SSL * ssl,const unsigned char * cookie,unsigned int cookie_len))1197 SSL_CTX_set_cookie_verify_cb(SSL_CTX *ctx,
1198 int (*cb)(SSL *ssl, const unsigned char *cookie, unsigned int cookie_len))
1199 {
1200 ctx->internal->app_verify_cookie_cb = cb;
1201 }
1202
1203 int
PEM_write_SSL_SESSION(FILE * fp,SSL_SESSION * x)1204 PEM_write_SSL_SESSION(FILE *fp, SSL_SESSION *x)
1205 {
1206 return PEM_ASN1_write((i2d_of_void *)i2d_SSL_SESSION,
1207 PEM_STRING_SSL_SESSION, fp, x, NULL, NULL, 0, NULL, NULL);
1208 }
1209
1210 SSL_SESSION *
PEM_read_SSL_SESSION(FILE * fp,SSL_SESSION ** x,pem_password_cb * cb,void * u)1211 PEM_read_SSL_SESSION(FILE *fp, SSL_SESSION **x, pem_password_cb *cb, void *u)
1212 {
1213 return PEM_ASN1_read((d2i_of_void *)d2i_SSL_SESSION,
1214 PEM_STRING_SSL_SESSION, fp, (void **)x, cb, u);
1215 }
1216
1217 SSL_SESSION *
PEM_read_bio_SSL_SESSION(BIO * bp,SSL_SESSION ** x,pem_password_cb * cb,void * u)1218 PEM_read_bio_SSL_SESSION(BIO *bp, SSL_SESSION **x, pem_password_cb *cb, void *u)
1219 {
1220 return PEM_ASN1_read_bio((d2i_of_void *)d2i_SSL_SESSION,
1221 PEM_STRING_SSL_SESSION, bp, (void **)x, cb, u);
1222 }
1223
1224 int
PEM_write_bio_SSL_SESSION(BIO * bp,SSL_SESSION * x)1225 PEM_write_bio_SSL_SESSION(BIO *bp, SSL_SESSION *x)
1226 {
1227 return PEM_ASN1_write_bio((i2d_of_void *)i2d_SSL_SESSION,
1228 PEM_STRING_SSL_SESSION, bp, x, NULL, NULL, 0, NULL, NULL);
1229 }
1230