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source: vbox/trunk/src/libs/openssl-3.0.2/ssl/ssl_sess.c@ 94403

最後變更 在這個檔案從94403是 94082,由 vboxsync 提交於 3 年 前

libs/openssl-3.0.1: started applying and adjusting our OpenSSL changes to 3.0.1. bugref:10128

檔案大小: 40.5 KB
 
1/*
2 * Copyright 1995-2021 The OpenSSL Project Authors. All Rights Reserved.
3 * Copyright 2005 Nokia. All rights reserved.
4 *
5 * Licensed under the Apache License 2.0 (the "License"). You may not use
6 * this file except in compliance with the License. You can obtain a copy
7 * in the file LICENSE in the source distribution or at
8 * https://www.openssl.org/source/license.html
9 */
10
11#if defined(__TANDEM) && defined(_SPT_MODEL_)
12# include <spthread.h>
13# include <spt_extensions.h> /* timeval */
14#endif
15#include <stdio.h>
16#include "e_os.h"
17#include <openssl/rand.h>
18#include <openssl/engine.h>
19#include "internal/refcount.h"
20#include "internal/cryptlib.h"
21#include "ssl_local.h"
22#include "statem/statem_local.h"
23
24static void SSL_SESSION_list_remove(SSL_CTX *ctx, SSL_SESSION *s);
25static void SSL_SESSION_list_add(SSL_CTX *ctx, SSL_SESSION *s);
26static int remove_session_lock(SSL_CTX *ctx, SSL_SESSION *c, int lck);
27
28DEFINE_STACK_OF(SSL_SESSION)
29
30__owur static int sess_timedout(time_t t, SSL_SESSION *ss)
31{
32 /* if timeout overflowed, it can never timeout! */
33 if (ss->timeout_ovf)
34 return 0;
35 return t > ss->calc_timeout;
36}
37
38/*
39 * Returns -1/0/+1 as other XXXcmp-type functions
40 * Takes overflow of calculated timeout into consideration
41 */
42__owur static int timeoutcmp(SSL_SESSION *a, SSL_SESSION *b)
43{
44 /* if only one overflowed, then it is greater */
45 if (a->timeout_ovf && !b->timeout_ovf)
46 return 1;
47 if (!a->timeout_ovf && b->timeout_ovf)
48 return -1;
49 /* No overflow, or both overflowed, so straight compare is safe */
50 if (a->calc_timeout < b->calc_timeout)
51 return -1;
52 if (a->calc_timeout > b->calc_timeout)
53 return 1;
54 return 0;
55}
56
57/*
58 * Calculates effective timeout, saving overflow state
59 * Locking must be done by the caller of this function
60 */
61void ssl_session_calculate_timeout(SSL_SESSION *ss)
62{
63 /* Force positive timeout */
64 if (ss->timeout < 0)
65 ss->timeout = 0;
66 ss->calc_timeout = ss->time + ss->timeout;
67 /*
68 * |timeout| is always zero or positive, so the check for
69 * overflow only needs to consider if |time| is positive
70 */
71 ss->timeout_ovf = ss->time > 0 && ss->calc_timeout < ss->time;
72 /*
73 * N.B. Realistic overflow can only occur in our lifetimes on a
74 * 32-bit machine in January 2038.
75 * However, There are no controls to limit the |timeout|
76 * value, except to keep it positive.
77 */
78}
79
80/*
81 * SSL_get_session() and SSL_get1_session() are problematic in TLS1.3 because,
82 * unlike in earlier protocol versions, the session ticket may not have been
83 * sent yet even though a handshake has finished. The session ticket data could
84 * come in sometime later...or even change if multiple session ticket messages
85 * are sent from the server. The preferred way for applications to obtain
86 * a resumable session is to use SSL_CTX_sess_set_new_cb().
87 */
88
89SSL_SESSION *SSL_get_session(const SSL *ssl)
90/* aka SSL_get0_session; gets 0 objects, just returns a copy of the pointer */
91{
92 return ssl->session;
93}
94
95SSL_SESSION *SSL_get1_session(SSL *ssl)
96/* variant of SSL_get_session: caller really gets something */
97{
98 SSL_SESSION *sess;
99 /*
100 * Need to lock this all up rather than just use CRYPTO_add so that
101 * somebody doesn't free ssl->session between when we check it's non-null
102 * and when we up the reference count.
103 */
104 if (!CRYPTO_THREAD_read_lock(ssl->lock))
105 return NULL;
106 sess = ssl->session;
107 if (sess)
108 SSL_SESSION_up_ref(sess);
109 CRYPTO_THREAD_unlock(ssl->lock);
110 return sess;
111}
112
113int SSL_SESSION_set_ex_data(SSL_SESSION *s, int idx, void *arg)
114{
115 return CRYPTO_set_ex_data(&s->ex_data, idx, arg);
116}
117
118void *SSL_SESSION_get_ex_data(const SSL_SESSION *s, int idx)
119{
120 return CRYPTO_get_ex_data(&s->ex_data, idx);
121}
122
123SSL_SESSION *SSL_SESSION_new(void)
124{
125 SSL_SESSION *ss;
126
127 if (!OPENSSL_init_ssl(OPENSSL_INIT_LOAD_SSL_STRINGS, NULL))
128 return NULL;
129
130 ss = OPENSSL_zalloc(sizeof(*ss));
131 if (ss == NULL) {
132 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
133 return NULL;
134 }
135
136 ss->verify_result = 1; /* avoid 0 (= X509_V_OK) just in case */
137 ss->references = 1;
138 ss->timeout = 60 * 5 + 4; /* 5 minute timeout by default */
139 ss->time = time(NULL);
140 ssl_session_calculate_timeout(ss);
141 ss->lock = CRYPTO_THREAD_lock_new();
142 if (ss->lock == NULL) {
143 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
144 OPENSSL_free(ss);
145 return NULL;
146 }
147
148 if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_SESSION, ss, &ss->ex_data)) {
149 CRYPTO_THREAD_lock_free(ss->lock);
150 OPENSSL_free(ss);
151 return NULL;
152 }
153 return ss;
154}
155
156SSL_SESSION *SSL_SESSION_dup(const SSL_SESSION *src)
157{
158 return ssl_session_dup(src, 1);
159}
160
161/*
162 * Create a new SSL_SESSION and duplicate the contents of |src| into it. If
163 * ticket == 0 then no ticket information is duplicated, otherwise it is.
164 */
165SSL_SESSION *ssl_session_dup(const SSL_SESSION *src, int ticket)
166{
167 SSL_SESSION *dest;
168
169 dest = OPENSSL_malloc(sizeof(*dest));
170 if (dest == NULL) {
171 goto err;
172 }
173 memcpy(dest, src, sizeof(*dest));
174
175 /*
176 * Set the various pointers to NULL so that we can call SSL_SESSION_free in
177 * the case of an error whilst halfway through constructing dest
178 */
179#ifndef OPENSSL_NO_PSK
180 dest->psk_identity_hint = NULL;
181 dest->psk_identity = NULL;
182#endif
183 dest->ext.hostname = NULL;
184 dest->ext.tick = NULL;
185 dest->ext.alpn_selected = NULL;
186#ifndef OPENSSL_NO_SRP
187 dest->srp_username = NULL;
188#endif
189 dest->peer_chain = NULL;
190 dest->peer = NULL;
191 dest->ticket_appdata = NULL;
192 memset(&dest->ex_data, 0, sizeof(dest->ex_data));
193
194 /* We deliberately don't copy the prev and next pointers */
195 dest->prev = NULL;
196 dest->next = NULL;
197
198 dest->references = 1;
199
200 dest->lock = CRYPTO_THREAD_lock_new();
201 if (dest->lock == NULL)
202 goto err;
203
204 if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_SESSION, dest, &dest->ex_data))
205 goto err;
206
207 if (src->peer != NULL) {
208 if (!X509_up_ref(src->peer))
209 goto err;
210 dest->peer = src->peer;
211 }
212
213 if (src->peer_chain != NULL) {
214 dest->peer_chain = X509_chain_up_ref(src->peer_chain);
215 if (dest->peer_chain == NULL)
216 goto err;
217 }
218#ifndef OPENSSL_NO_PSK
219 if (src->psk_identity_hint) {
220 dest->psk_identity_hint = OPENSSL_strdup(src->psk_identity_hint);
221 if (dest->psk_identity_hint == NULL) {
222 goto err;
223 }
224 }
225 if (src->psk_identity) {
226 dest->psk_identity = OPENSSL_strdup(src->psk_identity);
227 if (dest->psk_identity == NULL) {
228 goto err;
229 }
230 }
231#endif
232
233 if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_SSL_SESSION,
234 &dest->ex_data, &src->ex_data)) {
235 goto err;
236 }
237
238 if (src->ext.hostname) {
239 dest->ext.hostname = OPENSSL_strdup(src->ext.hostname);
240 if (dest->ext.hostname == NULL) {
241 goto err;
242 }
243 }
244
245 if (ticket != 0 && src->ext.tick != NULL) {
246 dest->ext.tick =
247 OPENSSL_memdup(src->ext.tick, src->ext.ticklen);
248 if (dest->ext.tick == NULL)
249 goto err;
250 } else {
251 dest->ext.tick_lifetime_hint = 0;
252 dest->ext.ticklen = 0;
253 }
254
255 if (src->ext.alpn_selected != NULL) {
256 dest->ext.alpn_selected = OPENSSL_memdup(src->ext.alpn_selected,
257 src->ext.alpn_selected_len);
258 if (dest->ext.alpn_selected == NULL)
259 goto err;
260 }
261
262#ifndef OPENSSL_NO_SRP
263 if (src->srp_username) {
264 dest->srp_username = OPENSSL_strdup(src->srp_username);
265 if (dest->srp_username == NULL) {
266 goto err;
267 }
268 }
269#endif
270
271 if (src->ticket_appdata != NULL) {
272 dest->ticket_appdata =
273 OPENSSL_memdup(src->ticket_appdata, src->ticket_appdata_len);
274 if (dest->ticket_appdata == NULL)
275 goto err;
276 }
277
278 return dest;
279 err:
280 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
281 SSL_SESSION_free(dest);
282 return NULL;
283}
284
285const unsigned char *SSL_SESSION_get_id(const SSL_SESSION *s, unsigned int *len)
286{
287 if (len)
288 *len = (unsigned int)s->session_id_length;
289 return s->session_id;
290}
291const unsigned char *SSL_SESSION_get0_id_context(const SSL_SESSION *s,
292 unsigned int *len)
293{
294 if (len != NULL)
295 *len = (unsigned int)s->sid_ctx_length;
296 return s->sid_ctx;
297}
298
299unsigned int SSL_SESSION_get_compress_id(const SSL_SESSION *s)
300{
301 return s->compress_meth;
302}
303
304/*
305 * SSLv3/TLSv1 has 32 bytes (256 bits) of session ID space. As such, filling
306 * the ID with random junk repeatedly until we have no conflict is going to
307 * complete in one iteration pretty much "most" of the time (btw:
308 * understatement). So, if it takes us 10 iterations and we still can't avoid
309 * a conflict - well that's a reasonable point to call it quits. Either the
310 * RAND code is broken or someone is trying to open roughly very close to
311 * 2^256 SSL sessions to our server. How you might store that many sessions
312 * is perhaps a more interesting question ...
313 */
314
315#define MAX_SESS_ID_ATTEMPTS 10
316static int def_generate_session_id(SSL *ssl, unsigned char *id,
317 unsigned int *id_len)
318{
319 unsigned int retry = 0;
320 do
321 if (RAND_bytes_ex(ssl->ctx->libctx, id, *id_len, 0) <= 0)
322 return 0;
323 while (SSL_has_matching_session_id(ssl, id, *id_len) &&
324 (++retry < MAX_SESS_ID_ATTEMPTS)) ;
325 if (retry < MAX_SESS_ID_ATTEMPTS)
326 return 1;
327 /* else - woops a session_id match */
328 /*
329 * XXX We should also check the external cache -- but the probability of
330 * a collision is negligible, and we could not prevent the concurrent
331 * creation of sessions with identical IDs since we currently don't have
332 * means to atomically check whether a session ID already exists and make
333 * a reservation for it if it does not (this problem applies to the
334 * internal cache as well).
335 */
336 return 0;
337}
338
339int ssl_generate_session_id(SSL *s, SSL_SESSION *ss)
340{
341 unsigned int tmp;
342 GEN_SESSION_CB cb = def_generate_session_id;
343
344 switch (s->version) {
345 case SSL3_VERSION:
346 case TLS1_VERSION:
347 case TLS1_1_VERSION:
348 case TLS1_2_VERSION:
349 case TLS1_3_VERSION:
350 case DTLS1_BAD_VER:
351 case DTLS1_VERSION:
352 case DTLS1_2_VERSION:
353 ss->session_id_length = SSL3_SSL_SESSION_ID_LENGTH;
354 break;
355 default:
356 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_UNSUPPORTED_SSL_VERSION);
357 return 0;
358 }
359
360 /*-
361 * If RFC5077 ticket, use empty session ID (as server).
362 * Note that:
363 * (a) ssl_get_prev_session() does lookahead into the
364 * ClientHello extensions to find the session ticket.
365 * When ssl_get_prev_session() fails, statem_srvr.c calls
366 * ssl_get_new_session() in tls_process_client_hello().
367 * At that point, it has not yet parsed the extensions,
368 * however, because of the lookahead, it already knows
369 * whether a ticket is expected or not.
370 *
371 * (b) statem_clnt.c calls ssl_get_new_session() before parsing
372 * ServerHello extensions, and before recording the session
373 * ID received from the server, so this block is a noop.
374 */
375 if (s->ext.ticket_expected) {
376 ss->session_id_length = 0;
377 return 1;
378 }
379
380 /* Choose which callback will set the session ID */
381 if (!CRYPTO_THREAD_read_lock(s->lock))
382 return 0;
383 if (!CRYPTO_THREAD_read_lock(s->session_ctx->lock)) {
384 CRYPTO_THREAD_unlock(s->lock);
385 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
386 SSL_R_SESSION_ID_CONTEXT_UNINITIALIZED);
387 return 0;
388 }
389 if (s->generate_session_id)
390 cb = s->generate_session_id;
391 else if (s->session_ctx->generate_session_id)
392 cb = s->session_ctx->generate_session_id;
393 CRYPTO_THREAD_unlock(s->session_ctx->lock);
394 CRYPTO_THREAD_unlock(s->lock);
395 /* Choose a session ID */
396 memset(ss->session_id, 0, ss->session_id_length);
397 tmp = (int)ss->session_id_length;
398 if (!cb(s, ss->session_id, &tmp)) {
399 /* The callback failed */
400 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
401 SSL_R_SSL_SESSION_ID_CALLBACK_FAILED);
402 return 0;
403 }
404 /*
405 * Don't allow the callback to set the session length to zero. nor
406 * set it higher than it was.
407 */
408 if (tmp == 0 || tmp > ss->session_id_length) {
409 /* The callback set an illegal length */
410 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
411 SSL_R_SSL_SESSION_ID_HAS_BAD_LENGTH);
412 return 0;
413 }
414 ss->session_id_length = tmp;
415 /* Finally, check for a conflict */
416 if (SSL_has_matching_session_id(s, ss->session_id,
417 (unsigned int)ss->session_id_length)) {
418 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_SSL_SESSION_ID_CONFLICT);
419 return 0;
420 }
421
422 return 1;
423}
424
425int ssl_get_new_session(SSL *s, int session)
426{
427 /* This gets used by clients and servers. */
428
429 SSL_SESSION *ss = NULL;
430
431 if ((ss = SSL_SESSION_new()) == NULL) {
432 SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_MALLOC_FAILURE);
433 return 0;
434 }
435
436 /* If the context has a default timeout, use it */
437 if (s->session_ctx->session_timeout == 0)
438 ss->timeout = SSL_get_default_timeout(s);
439 else
440 ss->timeout = s->session_ctx->session_timeout;
441 ssl_session_calculate_timeout(ss);
442
443 SSL_SESSION_free(s->session);
444 s->session = NULL;
445
446 if (session) {
447 if (SSL_IS_TLS13(s)) {
448 /*
449 * We generate the session id while constructing the
450 * NewSessionTicket in TLSv1.3.
451 */
452 ss->session_id_length = 0;
453 } else if (!ssl_generate_session_id(s, ss)) {
454 /* SSLfatal() already called */
455 SSL_SESSION_free(ss);
456 return 0;
457 }
458
459 } else {
460 ss->session_id_length = 0;
461 }
462
463 if (s->sid_ctx_length > sizeof(ss->sid_ctx)) {
464 SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
465 SSL_SESSION_free(ss);
466 return 0;
467 }
468 memcpy(ss->sid_ctx, s->sid_ctx, s->sid_ctx_length);
469 ss->sid_ctx_length = s->sid_ctx_length;
470 s->session = ss;
471 ss->ssl_version = s->version;
472 ss->verify_result = X509_V_OK;
473
474 /* If client supports extended master secret set it in session */
475 if (s->s3.flags & TLS1_FLAGS_RECEIVED_EXTMS)
476 ss->flags |= SSL_SESS_FLAG_EXTMS;
477
478 return 1;
479}
480
481SSL_SESSION *lookup_sess_in_cache(SSL *s, const unsigned char *sess_id,
482 size_t sess_id_len)
483{
484 SSL_SESSION *ret = NULL;
485
486 if ((s->session_ctx->session_cache_mode
487 & SSL_SESS_CACHE_NO_INTERNAL_LOOKUP) == 0) {
488 SSL_SESSION data;
489
490 data.ssl_version = s->version;
491 if (!ossl_assert(sess_id_len <= SSL_MAX_SSL_SESSION_ID_LENGTH))
492 return NULL;
493
494 memcpy(data.session_id, sess_id, sess_id_len);
495 data.session_id_length = sess_id_len;
496
497 if (!CRYPTO_THREAD_read_lock(s->session_ctx->lock))
498 return NULL;
499 ret = lh_SSL_SESSION_retrieve(s->session_ctx->sessions, &data);
500 if (ret != NULL) {
501 /* don't allow other threads to steal it: */
502 SSL_SESSION_up_ref(ret);
503 }
504 CRYPTO_THREAD_unlock(s->session_ctx->lock);
505 if (ret == NULL)
506 tsan_counter(&s->session_ctx->stats.sess_miss);
507 }
508
509 if (ret == NULL && s->session_ctx->get_session_cb != NULL) {
510 int copy = 1;
511
512 ret = s->session_ctx->get_session_cb(s, sess_id, sess_id_len, &copy);
513
514 if (ret != NULL) {
515 tsan_counter(&s->session_ctx->stats.sess_cb_hit);
516
517 /*
518 * Increment reference count now if the session callback asks us
519 * to do so (note that if the session structures returned by the
520 * callback are shared between threads, it must handle the
521 * reference count itself [i.e. copy == 0], or things won't be
522 * thread-safe).
523 */
524 if (copy)
525 SSL_SESSION_up_ref(ret);
526
527 /*
528 * Add the externally cached session to the internal cache as
529 * well if and only if we are supposed to.
530 */
531 if ((s->session_ctx->session_cache_mode &
532 SSL_SESS_CACHE_NO_INTERNAL_STORE) == 0) {
533 /*
534 * Either return value of SSL_CTX_add_session should not
535 * interrupt the session resumption process. The return
536 * value is intentionally ignored.
537 */
538 (void)SSL_CTX_add_session(s->session_ctx, ret);
539 }
540 }
541 }
542
543 return ret;
544}
545
546/*-
547 * ssl_get_prev attempts to find an SSL_SESSION to be used to resume this
548 * connection. It is only called by servers.
549 *
550 * hello: The parsed ClientHello data
551 *
552 * Returns:
553 * -1: fatal error
554 * 0: no session found
555 * 1: a session may have been found.
556 *
557 * Side effects:
558 * - If a session is found then s->session is pointed at it (after freeing an
559 * existing session if need be) and s->verify_result is set from the session.
560 * - Both for new and resumed sessions, s->ext.ticket_expected is set to 1
561 * if the server should issue a new session ticket (to 0 otherwise).
562 */
563int ssl_get_prev_session(SSL *s, CLIENTHELLO_MSG *hello)
564{
565 /* This is used only by servers. */
566
567 SSL_SESSION *ret = NULL;
568 int fatal = 0;
569 int try_session_cache = 0;
570 SSL_TICKET_STATUS r;
571
572 if (SSL_IS_TLS13(s)) {
573 /*
574 * By default we will send a new ticket. This can be overridden in the
575 * ticket processing.
576 */
577 s->ext.ticket_expected = 1;
578 if (!tls_parse_extension(s, TLSEXT_IDX_psk_kex_modes,
579 SSL_EXT_CLIENT_HELLO, hello->pre_proc_exts,
580 NULL, 0)
581 || !tls_parse_extension(s, TLSEXT_IDX_psk, SSL_EXT_CLIENT_HELLO,
582 hello->pre_proc_exts, NULL, 0))
583 return -1;
584
585 ret = s->session;
586 } else {
587 /* sets s->ext.ticket_expected */
588 r = tls_get_ticket_from_client(s, hello, &ret);
589 switch (r) {
590 case SSL_TICKET_FATAL_ERR_MALLOC:
591 case SSL_TICKET_FATAL_ERR_OTHER:
592 fatal = 1;
593 SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
594 goto err;
595 case SSL_TICKET_NONE:
596 case SSL_TICKET_EMPTY:
597 if (hello->session_id_len > 0) {
598 try_session_cache = 1;
599 ret = lookup_sess_in_cache(s, hello->session_id,
600 hello->session_id_len);
601 }
602 break;
603 case SSL_TICKET_NO_DECRYPT:
604 case SSL_TICKET_SUCCESS:
605 case SSL_TICKET_SUCCESS_RENEW:
606 break;
607 }
608 }
609
610 if (ret == NULL)
611 goto err;
612
613 /* Now ret is non-NULL and we own one of its reference counts. */
614
615 /* Check TLS version consistency */
616 if (ret->ssl_version != s->version)
617 goto err;
618
619 if (ret->sid_ctx_length != s->sid_ctx_length
620 || memcmp(ret->sid_ctx, s->sid_ctx, ret->sid_ctx_length)) {
621 /*
622 * We have the session requested by the client, but we don't want to
623 * use it in this context.
624 */
625 goto err; /* treat like cache miss */
626 }
627
628 if ((s->verify_mode & SSL_VERIFY_PEER) && s->sid_ctx_length == 0) {
629 /*
630 * We can't be sure if this session is being used out of context,
631 * which is especially important for SSL_VERIFY_PEER. The application
632 * should have used SSL[_CTX]_set_session_id_context. For this error
633 * case, we generate an error instead of treating the event like a
634 * cache miss (otherwise it would be easy for applications to
635 * effectively disable the session cache by accident without anyone
636 * noticing).
637 */
638
639 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
640 SSL_R_SESSION_ID_CONTEXT_UNINITIALIZED);
641 fatal = 1;
642 goto err;
643 }
644
645 if (sess_timedout(time(NULL), ret)) {
646 tsan_counter(&s->session_ctx->stats.sess_timeout);
647 if (try_session_cache) {
648 /* session was from the cache, so remove it */
649 SSL_CTX_remove_session(s->session_ctx, ret);
650 }
651 goto err;
652 }
653
654 /* Check extended master secret extension consistency */
655 if (ret->flags & SSL_SESS_FLAG_EXTMS) {
656 /* If old session includes extms, but new does not: abort handshake */
657 if (!(s->s3.flags & TLS1_FLAGS_RECEIVED_EXTMS)) {
658 SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_INCONSISTENT_EXTMS);
659 fatal = 1;
660 goto err;
661 }
662 } else if (s->s3.flags & TLS1_FLAGS_RECEIVED_EXTMS) {
663 /* If new session includes extms, but old does not: do not resume */
664 goto err;
665 }
666
667 if (!SSL_IS_TLS13(s)) {
668 /* We already did this for TLS1.3 */
669 SSL_SESSION_free(s->session);
670 s->session = ret;
671 }
672
673 tsan_counter(&s->session_ctx->stats.sess_hit);
674 s->verify_result = s->session->verify_result;
675 return 1;
676
677 err:
678 if (ret != NULL) {
679 SSL_SESSION_free(ret);
680 /* In TLSv1.3 s->session was already set to ret, so we NULL it out */
681 if (SSL_IS_TLS13(s))
682 s->session = NULL;
683
684 if (!try_session_cache) {
685 /*
686 * The session was from a ticket, so we should issue a ticket for
687 * the new session
688 */
689 s->ext.ticket_expected = 1;
690 }
691 }
692 if (fatal)
693 return -1;
694
695 return 0;
696}
697
698int SSL_CTX_add_session(SSL_CTX *ctx, SSL_SESSION *c)
699{
700 int ret = 0;
701 SSL_SESSION *s;
702
703 /*
704 * add just 1 reference count for the SSL_CTX's session cache even though
705 * it has two ways of access: each session is in a doubly linked list and
706 * an lhash
707 */
708 SSL_SESSION_up_ref(c);
709 /*
710 * if session c is in already in cache, we take back the increment later
711 */
712
713 if (!CRYPTO_THREAD_write_lock(ctx->lock)) {
714 SSL_SESSION_free(c);
715 return 0;
716 }
717 s = lh_SSL_SESSION_insert(ctx->sessions, c);
718
719 /*
720 * s != NULL iff we already had a session with the given PID. In this
721 * case, s == c should hold (then we did not really modify
722 * ctx->sessions), or we're in trouble.
723 */
724 if (s != NULL && s != c) {
725 /* We *are* in trouble ... */
726 SSL_SESSION_list_remove(ctx, s);
727 SSL_SESSION_free(s);
728 /*
729 * ... so pretend the other session did not exist in cache (we cannot
730 * handle two SSL_SESSION structures with identical session ID in the
731 * same cache, which could happen e.g. when two threads concurrently
732 * obtain the same session from an external cache)
733 */
734 s = NULL;
735 } else if (s == NULL &&
736 lh_SSL_SESSION_retrieve(ctx->sessions, c) == NULL) {
737 /* s == NULL can also mean OOM error in lh_SSL_SESSION_insert ... */
738
739 /*
740 * ... so take back the extra reference and also don't add
741 * the session to the SSL_SESSION_list at this time
742 */
743 s = c;
744 }
745
746 /* Adjust last used time, and add back into the cache at the appropriate spot */
747 if (ctx->session_cache_mode & SSL_SESS_CACHE_UPDATE_TIME) {
748 c->time = time(NULL);
749 ssl_session_calculate_timeout(c);
750 }
751 SSL_SESSION_list_add(ctx, c);
752
753 if (s != NULL) {
754 /*
755 * existing cache entry -- decrement previously incremented reference
756 * count because it already takes into account the cache
757 */
758
759 SSL_SESSION_free(s); /* s == c */
760 ret = 0;
761 } else {
762 /*
763 * new cache entry -- remove old ones if cache has become too large
764 */
765
766 ret = 1;
767
768 if (SSL_CTX_sess_get_cache_size(ctx) > 0) {
769 while (SSL_CTX_sess_number(ctx) > SSL_CTX_sess_get_cache_size(ctx)) {
770 if (!remove_session_lock(ctx, ctx->session_cache_tail, 0))
771 break;
772 else
773 tsan_counter(&ctx->stats.sess_cache_full);
774 }
775 }
776 }
777 CRYPTO_THREAD_unlock(ctx->lock);
778 return ret;
779}
780
781int SSL_CTX_remove_session(SSL_CTX *ctx, SSL_SESSION *c)
782{
783 return remove_session_lock(ctx, c, 1);
784}
785
786static int remove_session_lock(SSL_CTX *ctx, SSL_SESSION *c, int lck)
787{
788 SSL_SESSION *r;
789 int ret = 0;
790
791 if ((c != NULL) && (c->session_id_length != 0)) {
792 if (lck) {
793 if (!CRYPTO_THREAD_write_lock(ctx->lock))
794 return 0;
795 }
796 if ((r = lh_SSL_SESSION_retrieve(ctx->sessions, c)) != NULL) {
797 ret = 1;
798 r = lh_SSL_SESSION_delete(ctx->sessions, r);
799 SSL_SESSION_list_remove(ctx, r);
800 }
801 c->not_resumable = 1;
802
803 if (lck)
804 CRYPTO_THREAD_unlock(ctx->lock);
805
806 if (ctx->remove_session_cb != NULL)
807 ctx->remove_session_cb(ctx, c);
808
809 if (ret)
810 SSL_SESSION_free(r);
811 }
812 return ret;
813}
814
815void SSL_SESSION_free(SSL_SESSION *ss)
816{
817 int i;
818
819 if (ss == NULL)
820 return;
821 CRYPTO_DOWN_REF(&ss->references, &i, ss->lock);
822 REF_PRINT_COUNT("SSL_SESSION", ss);
823 if (i > 0)
824 return;
825 REF_ASSERT_ISNT(i < 0);
826
827 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_SESSION, ss, &ss->ex_data);
828
829 OPENSSL_cleanse(ss->master_key, sizeof(ss->master_key));
830 OPENSSL_cleanse(ss->session_id, sizeof(ss->session_id));
831 X509_free(ss->peer);
832 sk_X509_pop_free(ss->peer_chain, X509_free);
833 OPENSSL_free(ss->ext.hostname);
834 OPENSSL_free(ss->ext.tick);
835#ifndef OPENSSL_NO_PSK
836 OPENSSL_free(ss->psk_identity_hint);
837 OPENSSL_free(ss->psk_identity);
838#endif
839#ifndef OPENSSL_NO_SRP
840 OPENSSL_free(ss->srp_username);
841#endif
842 OPENSSL_free(ss->ext.alpn_selected);
843 OPENSSL_free(ss->ticket_appdata);
844 CRYPTO_THREAD_lock_free(ss->lock);
845 OPENSSL_clear_free(ss, sizeof(*ss));
846}
847
848int SSL_SESSION_up_ref(SSL_SESSION *ss)
849{
850 int i;
851
852 if (CRYPTO_UP_REF(&ss->references, &i, ss->lock) <= 0)
853 return 0;
854
855 REF_PRINT_COUNT("SSL_SESSION", ss);
856 REF_ASSERT_ISNT(i < 2);
857 return ((i > 1) ? 1 : 0);
858}
859
860int SSL_set_session(SSL *s, SSL_SESSION *session)
861{
862 ssl_clear_bad_session(s);
863 if (s->ctx->method != s->method) {
864 if (!SSL_set_ssl_method(s, s->ctx->method))
865 return 0;
866 }
867
868 if (session != NULL) {
869 SSL_SESSION_up_ref(session);
870 s->verify_result = session->verify_result;
871 }
872 SSL_SESSION_free(s->session);
873 s->session = session;
874
875 return 1;
876}
877
878int SSL_SESSION_set1_id(SSL_SESSION *s, const unsigned char *sid,
879 unsigned int sid_len)
880{
881 if (sid_len > SSL_MAX_SSL_SESSION_ID_LENGTH) {
882 ERR_raise(ERR_LIB_SSL, SSL_R_SSL_SESSION_ID_TOO_LONG);
883 return 0;
884 }
885 s->session_id_length = sid_len;
886 if (sid != s->session_id)
887 memcpy(s->session_id, sid, sid_len);
888 return 1;
889}
890
891long SSL_SESSION_set_timeout(SSL_SESSION *s, long t)
892{
893 time_t new_timeout = (time_t)t;
894
895 if (s == NULL || t < 0)
896 return 0;
897 if (s->owner != NULL) {
898 if (!CRYPTO_THREAD_write_lock(s->owner->lock))
899 return 0;
900 s->timeout = new_timeout;
901 ssl_session_calculate_timeout(s);
902 SSL_SESSION_list_add(s->owner, s);
903 CRYPTO_THREAD_unlock(s->owner->lock);
904 } else {
905 s->timeout = new_timeout;
906 ssl_session_calculate_timeout(s);
907 }
908 return 1;
909}
910
911long SSL_SESSION_get_timeout(const SSL_SESSION *s)
912{
913 if (s == NULL)
914 return 0;
915 return (long)s->timeout;
916}
917
918long SSL_SESSION_get_time(const SSL_SESSION *s)
919{
920 if (s == NULL)
921 return 0;
922 return (long)s->time;
923}
924
925long SSL_SESSION_set_time(SSL_SESSION *s, long t)
926{
927 time_t new_time = (time_t)t;
928
929 if (s == NULL)
930 return 0;
931 if (s->owner != NULL) {
932 if (!CRYPTO_THREAD_write_lock(s->owner->lock))
933 return 0;
934 s->time = new_time;
935 ssl_session_calculate_timeout(s);
936 SSL_SESSION_list_add(s->owner, s);
937 CRYPTO_THREAD_unlock(s->owner->lock);
938 } else {
939 s->time = new_time;
940 ssl_session_calculate_timeout(s);
941 }
942 return t;
943}
944
945int SSL_SESSION_get_protocol_version(const SSL_SESSION *s)
946{
947 return s->ssl_version;
948}
949
950int SSL_SESSION_set_protocol_version(SSL_SESSION *s, int version)
951{
952 s->ssl_version = version;
953 return 1;
954}
955
956const SSL_CIPHER *SSL_SESSION_get0_cipher(const SSL_SESSION *s)
957{
958 return s->cipher;
959}
960
961int SSL_SESSION_set_cipher(SSL_SESSION *s, const SSL_CIPHER *cipher)
962{
963 s->cipher = cipher;
964 return 1;
965}
966
967const char *SSL_SESSION_get0_hostname(const SSL_SESSION *s)
968{
969 return s->ext.hostname;
970}
971
972int SSL_SESSION_set1_hostname(SSL_SESSION *s, const char *hostname)
973{
974 OPENSSL_free(s->ext.hostname);
975 if (hostname == NULL) {
976 s->ext.hostname = NULL;
977 return 1;
978 }
979 s->ext.hostname = OPENSSL_strdup(hostname);
980
981 return s->ext.hostname != NULL;
982}
983
984int SSL_SESSION_has_ticket(const SSL_SESSION *s)
985{
986 return (s->ext.ticklen > 0) ? 1 : 0;
987}
988
989unsigned long SSL_SESSION_get_ticket_lifetime_hint(const SSL_SESSION *s)
990{
991 return s->ext.tick_lifetime_hint;
992}
993
994void SSL_SESSION_get0_ticket(const SSL_SESSION *s, const unsigned char **tick,
995 size_t *len)
996{
997 *len = s->ext.ticklen;
998 if (tick != NULL)
999 *tick = s->ext.tick;
1000}
1001
1002uint32_t SSL_SESSION_get_max_early_data(const SSL_SESSION *s)
1003{
1004 return s->ext.max_early_data;
1005}
1006
1007int SSL_SESSION_set_max_early_data(SSL_SESSION *s, uint32_t max_early_data)
1008{
1009 s->ext.max_early_data = max_early_data;
1010
1011 return 1;
1012}
1013
1014void SSL_SESSION_get0_alpn_selected(const SSL_SESSION *s,
1015 const unsigned char **alpn,
1016 size_t *len)
1017{
1018 *alpn = s->ext.alpn_selected;
1019 *len = s->ext.alpn_selected_len;
1020}
1021
1022int SSL_SESSION_set1_alpn_selected(SSL_SESSION *s, const unsigned char *alpn,
1023 size_t len)
1024{
1025 OPENSSL_free(s->ext.alpn_selected);
1026 if (alpn == NULL || len == 0) {
1027 s->ext.alpn_selected = NULL;
1028 s->ext.alpn_selected_len = 0;
1029 return 1;
1030 }
1031 s->ext.alpn_selected = OPENSSL_memdup(alpn, len);
1032 if (s->ext.alpn_selected == NULL) {
1033 s->ext.alpn_selected_len = 0;
1034 return 0;
1035 }
1036 s->ext.alpn_selected_len = len;
1037
1038 return 1;
1039}
1040
1041X509 *SSL_SESSION_get0_peer(SSL_SESSION *s)
1042{
1043 return s->peer;
1044}
1045
1046int SSL_SESSION_set1_id_context(SSL_SESSION *s, const unsigned char *sid_ctx,
1047 unsigned int sid_ctx_len)
1048{
1049 if (sid_ctx_len > SSL_MAX_SID_CTX_LENGTH) {
1050 ERR_raise(ERR_LIB_SSL, SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
1051 return 0;
1052 }
1053 s->sid_ctx_length = sid_ctx_len;
1054 if (sid_ctx != s->sid_ctx)
1055 memcpy(s->sid_ctx, sid_ctx, sid_ctx_len);
1056
1057 return 1;
1058}
1059
1060int SSL_SESSION_is_resumable(const SSL_SESSION *s)
1061{
1062 /*
1063 * In the case of EAP-FAST, we can have a pre-shared "ticket" without a
1064 * session ID.
1065 */
1066 return !s->not_resumable
1067 && (s->session_id_length > 0 || s->ext.ticklen > 0);
1068}
1069
1070long SSL_CTX_set_timeout(SSL_CTX *s, long t)
1071{
1072 long l;
1073 if (s == NULL)
1074 return 0;
1075 l = s->session_timeout;
1076 s->session_timeout = t;
1077 return l;
1078}
1079
1080long SSL_CTX_get_timeout(const SSL_CTX *s)
1081{
1082 if (s == NULL)
1083 return 0;
1084 return s->session_timeout;
1085}
1086
1087int SSL_set_session_secret_cb(SSL *s,
1088 tls_session_secret_cb_fn tls_session_secret_cb,
1089 void *arg)
1090{
1091 if (s == NULL)
1092 return 0;
1093 s->ext.session_secret_cb = tls_session_secret_cb;
1094 s->ext.session_secret_cb_arg = arg;
1095 return 1;
1096}
1097
1098int SSL_set_session_ticket_ext_cb(SSL *s, tls_session_ticket_ext_cb_fn cb,
1099 void *arg)
1100{
1101 if (s == NULL)
1102 return 0;
1103 s->ext.session_ticket_cb = cb;
1104 s->ext.session_ticket_cb_arg = arg;
1105 return 1;
1106}
1107
1108int SSL_set_session_ticket_ext(SSL *s, void *ext_data, int ext_len)
1109{
1110 if (s->version >= TLS1_VERSION) {
1111 OPENSSL_free(s->ext.session_ticket);
1112 s->ext.session_ticket = NULL;
1113 s->ext.session_ticket =
1114 OPENSSL_malloc(sizeof(TLS_SESSION_TICKET_EXT) + ext_len);
1115 if (s->ext.session_ticket == NULL) {
1116 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
1117 return 0;
1118 }
1119
1120 if (ext_data != NULL) {
1121 s->ext.session_ticket->length = ext_len;
1122 s->ext.session_ticket->data = s->ext.session_ticket + 1;
1123 memcpy(s->ext.session_ticket->data, ext_data, ext_len);
1124 } else {
1125 s->ext.session_ticket->length = 0;
1126 s->ext.session_ticket->data = NULL;
1127 }
1128
1129 return 1;
1130 }
1131
1132 return 0;
1133}
1134
1135void SSL_CTX_flush_sessions(SSL_CTX *s, long t)
1136{
1137 STACK_OF(SSL_SESSION) *sk;
1138 SSL_SESSION *current;
1139 unsigned long i;
1140
1141 if (!CRYPTO_THREAD_write_lock(s->lock))
1142 return;
1143
1144 sk = sk_SSL_SESSION_new_null();
1145 i = lh_SSL_SESSION_get_down_load(s->sessions);
1146 lh_SSL_SESSION_set_down_load(s->sessions, 0);
1147
1148 /*
1149 * Iterate over the list from the back (oldest), and stop
1150 * when a session can no longer be removed.
1151 * Add the session to a temporary list to be freed outside
1152 * the SSL_CTX lock.
1153 * But still do the remove_session_cb() within the lock.
1154 */
1155 while (s->session_cache_tail != NULL) {
1156 current = s->session_cache_tail;
1157 if (t == 0 || sess_timedout((time_t)t, current)) {
1158 lh_SSL_SESSION_delete(s->sessions, current);
1159 SSL_SESSION_list_remove(s, current);
1160 current->not_resumable = 1;
1161 if (s->remove_session_cb != NULL)
1162 s->remove_session_cb(s, current);
1163 /*
1164 * Throw the session on a stack, it's entirely plausible
1165 * that while freeing outside the critical section, the
1166 * session could be re-added, so avoid using the next/prev
1167 * pointers. If the stack failed to create, or the session
1168 * couldn't be put on the stack, just free it here
1169 */
1170 if (sk == NULL || !sk_SSL_SESSION_push(sk, current))
1171 SSL_SESSION_free(current);
1172 } else {
1173 break;
1174 }
1175 }
1176
1177 lh_SSL_SESSION_set_down_load(s->sessions, i);
1178 CRYPTO_THREAD_unlock(s->lock);
1179
1180 sk_SSL_SESSION_pop_free(sk, SSL_SESSION_free);
1181}
1182
1183int ssl_clear_bad_session(SSL *s)
1184{
1185 if ((s->session != NULL) &&
1186 !(s->shutdown & SSL_SENT_SHUTDOWN) &&
1187 !(SSL_in_init(s) || SSL_in_before(s))) {
1188 SSL_CTX_remove_session(s->session_ctx, s->session);
1189 return 1;
1190 } else
1191 return 0;
1192}
1193
1194/* locked by SSL_CTX in the calling function */
1195static void SSL_SESSION_list_remove(SSL_CTX *ctx, SSL_SESSION *s)
1196{
1197 if ((s->next == NULL) || (s->prev == NULL))
1198 return;
1199
1200 if (s->next == (SSL_SESSION *)&(ctx->session_cache_tail)) {
1201 /* last element in list */
1202 if (s->prev == (SSL_SESSION *)&(ctx->session_cache_head)) {
1203 /* only one element in list */
1204 ctx->session_cache_head = NULL;
1205 ctx->session_cache_tail = NULL;
1206 } else {
1207 ctx->session_cache_tail = s->prev;
1208 s->prev->next = (SSL_SESSION *)&(ctx->session_cache_tail);
1209 }
1210 } else {
1211 if (s->prev == (SSL_SESSION *)&(ctx->session_cache_head)) {
1212 /* first element in list */
1213 ctx->session_cache_head = s->next;
1214 s->next->prev = (SSL_SESSION *)&(ctx->session_cache_head);
1215 } else {
1216 /* middle of list */
1217 s->next->prev = s->prev;
1218 s->prev->next = s->next;
1219 }
1220 }
1221 s->prev = s->next = NULL;
1222 s->owner = NULL;
1223}
1224
1225static void SSL_SESSION_list_add(SSL_CTX *ctx, SSL_SESSION *s)
1226{
1227 SSL_SESSION *next;
1228
1229 if ((s->next != NULL) && (s->prev != NULL))
1230 SSL_SESSION_list_remove(ctx, s);
1231
1232 if (ctx->session_cache_head == NULL) {
1233 ctx->session_cache_head = s;
1234 ctx->session_cache_tail = s;
1235 s->prev = (SSL_SESSION *)&(ctx->session_cache_head);
1236 s->next = (SSL_SESSION *)&(ctx->session_cache_tail);
1237 } else {
1238 if (timeoutcmp(s, ctx->session_cache_head) >= 0) {
1239 /*
1240 * if we timeout after (or the same time as) the first
1241 * session, put us first - usual case
1242 */
1243 s->next = ctx->session_cache_head;
1244 s->next->prev = s;
1245 s->prev = (SSL_SESSION *)&(ctx->session_cache_head);
1246 ctx->session_cache_head = s;
1247 } else if (timeoutcmp(s, ctx->session_cache_tail) < 0) {
1248 /* if we timeout before the last session, put us last */
1249 s->prev = ctx->session_cache_tail;
1250 s->prev->next = s;
1251 s->next = (SSL_SESSION *)&(ctx->session_cache_tail);
1252 ctx->session_cache_tail = s;
1253 } else {
1254 /*
1255 * we timeout somewhere in-between - if there is only
1256 * one session in the cache it will be caught above
1257 */
1258 next = ctx->session_cache_head->next;
1259 while (next != (SSL_SESSION*)&(ctx->session_cache_tail)) {
1260 if (timeoutcmp(s, next) >= 0) {
1261 s->next = next;
1262 s->prev = next->prev;
1263 next->prev->next = s;
1264 next->prev = s;
1265 break;
1266 }
1267 next = next->next;
1268 }
1269 }
1270 }
1271 s->owner = ctx;
1272}
1273
1274void SSL_CTX_sess_set_new_cb(SSL_CTX *ctx,
1275 int (*cb) (struct ssl_st *ssl, SSL_SESSION *sess))
1276{
1277 ctx->new_session_cb = cb;
1278}
1279
1280int (*SSL_CTX_sess_get_new_cb(SSL_CTX *ctx)) (SSL *ssl, SSL_SESSION *sess) {
1281 return ctx->new_session_cb;
1282}
1283
1284void SSL_CTX_sess_set_remove_cb(SSL_CTX *ctx,
1285 void (*cb) (SSL_CTX *ctx, SSL_SESSION *sess))
1286{
1287 ctx->remove_session_cb = cb;
1288}
1289
1290void (*SSL_CTX_sess_get_remove_cb(SSL_CTX *ctx)) (SSL_CTX *ctx,
1291 SSL_SESSION *sess) {
1292 return ctx->remove_session_cb;
1293}
1294
1295void SSL_CTX_sess_set_get_cb(SSL_CTX *ctx,
1296 SSL_SESSION *(*cb) (struct ssl_st *ssl,
1297 const unsigned char *data,
1298 int len, int *copy))
1299{
1300 ctx->get_session_cb = cb;
1301}
1302
1303SSL_SESSION *(*SSL_CTX_sess_get_get_cb(SSL_CTX *ctx)) (SSL *ssl,
1304 const unsigned char
1305 *data, int len,
1306 int *copy) {
1307 return ctx->get_session_cb;
1308}
1309
1310void SSL_CTX_set_info_callback(SSL_CTX *ctx,
1311 void (*cb) (const SSL *ssl, int type, int val))
1312{
1313 ctx->info_callback = cb;
1314}
1315
1316void (*SSL_CTX_get_info_callback(SSL_CTX *ctx)) (const SSL *ssl, int type,
1317 int val) {
1318 return ctx->info_callback;
1319}
1320
1321void SSL_CTX_set_client_cert_cb(SSL_CTX *ctx,
1322 int (*cb) (SSL *ssl, X509 **x509,
1323 EVP_PKEY **pkey))
1324{
1325 ctx->client_cert_cb = cb;
1326}
1327
1328int (*SSL_CTX_get_client_cert_cb(SSL_CTX *ctx)) (SSL *ssl, X509 **x509,
1329 EVP_PKEY **pkey) {
1330 return ctx->client_cert_cb;
1331}
1332
1333void SSL_CTX_set_cookie_generate_cb(SSL_CTX *ctx,
1334 int (*cb) (SSL *ssl,
1335 unsigned char *cookie,
1336 unsigned int *cookie_len))
1337{
1338 ctx->app_gen_cookie_cb = cb;
1339}
1340
1341void SSL_CTX_set_cookie_verify_cb(SSL_CTX *ctx,
1342 int (*cb) (SSL *ssl,
1343 const unsigned char *cookie,
1344 unsigned int cookie_len))
1345{
1346 ctx->app_verify_cookie_cb = cb;
1347}
1348
1349int SSL_SESSION_set1_ticket_appdata(SSL_SESSION *ss, const void *data, size_t len)
1350{
1351 OPENSSL_free(ss->ticket_appdata);
1352 ss->ticket_appdata_len = 0;
1353 if (data == NULL || len == 0) {
1354 ss->ticket_appdata = NULL;
1355 return 1;
1356 }
1357 ss->ticket_appdata = OPENSSL_memdup(data, len);
1358 if (ss->ticket_appdata != NULL) {
1359 ss->ticket_appdata_len = len;
1360 return 1;
1361 }
1362 return 0;
1363}
1364
1365int SSL_SESSION_get0_ticket_appdata(SSL_SESSION *ss, void **data, size_t *len)
1366{
1367 *data = ss->ticket_appdata;
1368 *len = ss->ticket_appdata_len;
1369 return 1;
1370}
1371
1372void SSL_CTX_set_stateless_cookie_generate_cb(
1373 SSL_CTX *ctx,
1374 int (*cb) (SSL *ssl,
1375 unsigned char *cookie,
1376 size_t *cookie_len))
1377{
1378 ctx->gen_stateless_cookie_cb = cb;
1379}
1380
1381void SSL_CTX_set_stateless_cookie_verify_cb(
1382 SSL_CTX *ctx,
1383 int (*cb) (SSL *ssl,
1384 const unsigned char *cookie,
1385 size_t cookie_len))
1386{
1387 ctx->verify_stateless_cookie_cb = cb;
1388}
1389
1390IMPLEMENT_PEM_rw(SSL_SESSION, SSL_SESSION, PEM_STRING_SSL_SESSION, SSL_SESSION)
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