1 /*
2 * Copyright 1995-2023 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 <openssl/rand.h>
17 #include <openssl/engine.h>
18 #include "internal/refcount.h"
19 #include "internal/cryptlib.h"
20 #include "ssl_local.h"
21 #include "statem/statem_local.h"
22
23 static void SSL_SESSION_list_remove(SSL_CTX *ctx, SSL_SESSION *s);
24 static void SSL_SESSION_list_add(SSL_CTX *ctx, SSL_SESSION *s);
25 static int remove_session_lock(SSL_CTX *ctx, SSL_SESSION *c, int lck);
26
DEFINE_STACK_OF(SSL_SESSION)27 DEFINE_STACK_OF(SSL_SESSION)
28
29 __owur static int sess_timedout(time_t t, SSL_SESSION *ss)
30 {
31 /* if timeout overflowed, it can never timeout! */
32 if (ss->timeout_ovf)
33 return 0;
34 return t > ss->calc_timeout;
35 }
36
37 /*
38 * Returns -1/0/+1 as other XXXcmp-type functions
39 * Takes overflow of calculated timeout into consideration
40 */
timeoutcmp(SSL_SESSION * a,SSL_SESSION * b)41 __owur static int timeoutcmp(SSL_SESSION *a, SSL_SESSION *b)
42 {
43 /* if only one overflowed, then it is greater */
44 if (a->timeout_ovf && !b->timeout_ovf)
45 return 1;
46 if (!a->timeout_ovf && b->timeout_ovf)
47 return -1;
48 /* No overflow, or both overflowed, so straight compare is safe */
49 if (a->calc_timeout < b->calc_timeout)
50 return -1;
51 if (a->calc_timeout > b->calc_timeout)
52 return 1;
53 return 0;
54 }
55
56 #ifdef __DJGPP__ /* time_t is unsigned on djgpp, it's signed anywhere else */
57 # define TMAX(_type_) ((time_t)-1)
58 #else
59 # define TMAX(_type_) ((time_t)(((_type_)-1) >> 1))
60 #endif
61
62 #define CALCULATE_TIMEOUT(_ss_, _type_) do { \
63 _type_ overflow; \
64 time_t tmax = TMAX(_type_); \
65 overflow = (_type_)tmax - (_type_)(_ss_)->time; \
66 if ((_ss_)->timeout > (time_t)overflow) { \
67 (_ss_)->timeout_ovf = 1; \
68 (_ss_)->calc_timeout = (_ss_)->timeout - (time_t)overflow; \
69 } else { \
70 (_ss_)->timeout_ovf = 0; \
71 (_ss_)->calc_timeout = (_ss_)->time + (_ss_)->timeout; \
72 } \
73 } while (0)
74 /*
75 * Calculates effective timeout, saving overflow state
76 * Locking must be done by the caller of this function
77 */
ssl_session_calculate_timeout(SSL_SESSION * ss)78 void ssl_session_calculate_timeout(SSL_SESSION *ss)
79 {
80
81 if (sizeof(time_t) == 8)
82 CALCULATE_TIMEOUT(ss, uint64_t);
83 else
84 CALCULATE_TIMEOUT(ss, uint32_t);
85
86 /*
87 * N.B. Realistic overflow can only occur in our lifetimes on a
88 * 32-bit machine in January 2038.
89 * However, There are no controls to limit the |timeout|
90 * value, except to keep it positive.
91 */
92 }
93
94 /*
95 * SSL_get_session() and SSL_get1_session() are problematic in TLS1.3 because,
96 * unlike in earlier protocol versions, the session ticket may not have been
97 * sent yet even though a handshake has finished. The session ticket data could
98 * come in sometime later...or even change if multiple session ticket messages
99 * are sent from the server. The preferred way for applications to obtain
100 * a resumable session is to use SSL_CTX_sess_set_new_cb().
101 */
102
SSL_get_session(const SSL * ssl)103 SSL_SESSION *SSL_get_session(const SSL *ssl)
104 /* aka SSL_get0_session; gets 0 objects, just returns a copy of the pointer */
105 {
106 return ssl->session;
107 }
108
SSL_get1_session(SSL * ssl)109 SSL_SESSION *SSL_get1_session(SSL *ssl)
110 /* variant of SSL_get_session: caller really gets something */
111 {
112 SSL_SESSION *sess;
113 /*
114 * Need to lock this all up rather than just use CRYPTO_add so that
115 * somebody doesn't free ssl->session between when we check it's non-null
116 * and when we up the reference count.
117 */
118 if (!CRYPTO_THREAD_read_lock(ssl->lock))
119 return NULL;
120 sess = ssl->session;
121 if (sess)
122 SSL_SESSION_up_ref(sess);
123 CRYPTO_THREAD_unlock(ssl->lock);
124 return sess;
125 }
126
SSL_SESSION_set_ex_data(SSL_SESSION * s,int idx,void * arg)127 int SSL_SESSION_set_ex_data(SSL_SESSION *s, int idx, void *arg)
128 {
129 return CRYPTO_set_ex_data(&s->ex_data, idx, arg);
130 }
131
SSL_SESSION_get_ex_data(const SSL_SESSION * s,int idx)132 void *SSL_SESSION_get_ex_data(const SSL_SESSION *s, int idx)
133 {
134 return CRYPTO_get_ex_data(&s->ex_data, idx);
135 }
136
SSL_SESSION_new(void)137 SSL_SESSION *SSL_SESSION_new(void)
138 {
139 SSL_SESSION *ss;
140
141 if (!OPENSSL_init_ssl(OPENSSL_INIT_LOAD_SSL_STRINGS, NULL))
142 return NULL;
143
144 ss = OPENSSL_zalloc(sizeof(*ss));
145 if (ss == NULL) {
146 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
147 return NULL;
148 }
149
150 ss->verify_result = 1; /* avoid 0 (= X509_V_OK) just in case */
151 ss->references = 1;
152 ss->timeout = 60 * 5 + 4; /* 5 minute timeout by default */
153 ss->time = time(NULL);
154 ssl_session_calculate_timeout(ss);
155 ss->lock = CRYPTO_THREAD_lock_new();
156 if (ss->lock == NULL) {
157 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
158 OPENSSL_free(ss);
159 return NULL;
160 }
161
162 if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_SESSION, ss, &ss->ex_data)) {
163 CRYPTO_THREAD_lock_free(ss->lock);
164 OPENSSL_free(ss);
165 return NULL;
166 }
167 return ss;
168 }
169
170 /*
171 * Create a new SSL_SESSION and duplicate the contents of |src| into it. If
172 * ticket == 0 then no ticket information is duplicated, otherwise it is.
173 */
ssl_session_dup_intern(const SSL_SESSION * src,int ticket)174 static SSL_SESSION *ssl_session_dup_intern(const SSL_SESSION *src, int ticket)
175 {
176 SSL_SESSION *dest;
177
178 dest = OPENSSL_malloc(sizeof(*dest));
179 if (dest == NULL) {
180 goto err;
181 }
182 memcpy(dest, src, sizeof(*dest));
183
184 /*
185 * Set the various pointers to NULL so that we can call SSL_SESSION_free in
186 * the case of an error whilst halfway through constructing dest
187 */
188 #ifndef OPENSSL_NO_PSK
189 dest->psk_identity_hint = NULL;
190 dest->psk_identity = NULL;
191 #endif
192 dest->ext.hostname = NULL;
193 dest->ext.tick = NULL;
194 dest->ext.alpn_selected = NULL;
195 #ifndef OPENSSL_NO_SRP
196 dest->srp_username = NULL;
197 #endif
198 dest->peer_chain = NULL;
199 dest->peer = NULL;
200 dest->ticket_appdata = NULL;
201 memset(&dest->ex_data, 0, sizeof(dest->ex_data));
202
203 /* As the copy is not in the cache, we remove the associated pointers */
204 dest->prev = NULL;
205 dest->next = NULL;
206 dest->owner = NULL;
207
208 dest->references = 1;
209
210 dest->lock = CRYPTO_THREAD_lock_new();
211 if (dest->lock == NULL)
212 goto err;
213
214 if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_SESSION, dest, &dest->ex_data))
215 goto err;
216
217 if (src->peer != NULL) {
218 if (!X509_up_ref(src->peer))
219 goto err;
220 dest->peer = src->peer;
221 }
222
223 if (src->peer_chain != NULL) {
224 dest->peer_chain = X509_chain_up_ref(src->peer_chain);
225 if (dest->peer_chain == NULL)
226 goto err;
227 }
228 #ifndef OPENSSL_NO_PSK
229 if (src->psk_identity_hint) {
230 dest->psk_identity_hint = OPENSSL_strdup(src->psk_identity_hint);
231 if (dest->psk_identity_hint == NULL) {
232 goto err;
233 }
234 }
235 if (src->psk_identity) {
236 dest->psk_identity = OPENSSL_strdup(src->psk_identity);
237 if (dest->psk_identity == NULL) {
238 goto err;
239 }
240 }
241 #endif
242
243 if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_SSL_SESSION,
244 &dest->ex_data, &src->ex_data)) {
245 goto err;
246 }
247
248 if (src->ext.hostname) {
249 dest->ext.hostname = OPENSSL_strdup(src->ext.hostname);
250 if (dest->ext.hostname == NULL) {
251 goto err;
252 }
253 }
254
255 if (ticket != 0 && src->ext.tick != NULL) {
256 dest->ext.tick =
257 OPENSSL_memdup(src->ext.tick, src->ext.ticklen);
258 if (dest->ext.tick == NULL)
259 goto err;
260 } else {
261 dest->ext.tick_lifetime_hint = 0;
262 dest->ext.ticklen = 0;
263 }
264
265 if (src->ext.alpn_selected != NULL) {
266 dest->ext.alpn_selected = OPENSSL_memdup(src->ext.alpn_selected,
267 src->ext.alpn_selected_len);
268 if (dest->ext.alpn_selected == NULL)
269 goto err;
270 }
271
272 #ifndef OPENSSL_NO_SRP
273 if (src->srp_username) {
274 dest->srp_username = OPENSSL_strdup(src->srp_username);
275 if (dest->srp_username == NULL) {
276 goto err;
277 }
278 }
279 #endif
280
281 if (src->ticket_appdata != NULL) {
282 dest->ticket_appdata =
283 OPENSSL_memdup(src->ticket_appdata, src->ticket_appdata_len);
284 if (dest->ticket_appdata == NULL)
285 goto err;
286 }
287
288 return dest;
289 err:
290 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
291 SSL_SESSION_free(dest);
292 return NULL;
293 }
294
SSL_SESSION_dup(const SSL_SESSION * src)295 SSL_SESSION *SSL_SESSION_dup(const SSL_SESSION *src)
296 {
297 return ssl_session_dup_intern(src, 1);
298 }
299
300 /*
301 * Used internally when duplicating a session which might be already shared.
302 * We will have resumed the original session. Subsequently we might have marked
303 * it as non-resumable (e.g. in another thread) - but this copy should be ok to
304 * resume from.
305 */
ssl_session_dup(const SSL_SESSION * src,int ticket)306 SSL_SESSION *ssl_session_dup(const SSL_SESSION *src, int ticket)
307 {
308 SSL_SESSION *sess = ssl_session_dup_intern(src, ticket);
309
310 if (sess != NULL)
311 sess->not_resumable = 0;
312
313 return sess;
314 }
315
SSL_SESSION_get_id(const SSL_SESSION * s,unsigned int * len)316 const unsigned char *SSL_SESSION_get_id(const SSL_SESSION *s, unsigned int *len)
317 {
318 if (len)
319 *len = (unsigned int)s->session_id_length;
320 return s->session_id;
321 }
SSL_SESSION_get0_id_context(const SSL_SESSION * s,unsigned int * len)322 const unsigned char *SSL_SESSION_get0_id_context(const SSL_SESSION *s,
323 unsigned int *len)
324 {
325 if (len != NULL)
326 *len = (unsigned int)s->sid_ctx_length;
327 return s->sid_ctx;
328 }
329
SSL_SESSION_get_compress_id(const SSL_SESSION * s)330 unsigned int SSL_SESSION_get_compress_id(const SSL_SESSION *s)
331 {
332 return s->compress_meth;
333 }
334
335 /*
336 * SSLv3/TLSv1 has 32 bytes (256 bits) of session ID space. As such, filling
337 * the ID with random junk repeatedly until we have no conflict is going to
338 * complete in one iteration pretty much "most" of the time (btw:
339 * understatement). So, if it takes us 10 iterations and we still can't avoid
340 * a conflict - well that's a reasonable point to call it quits. Either the
341 * RAND code is broken or someone is trying to open roughly very close to
342 * 2^256 SSL sessions to our server. How you might store that many sessions
343 * is perhaps a more interesting question ...
344 */
345
346 #define MAX_SESS_ID_ATTEMPTS 10
def_generate_session_id(SSL * ssl,unsigned char * id,unsigned int * id_len)347 static int def_generate_session_id(SSL *ssl, unsigned char *id,
348 unsigned int *id_len)
349 {
350 unsigned int retry = 0;
351 do
352 if (RAND_bytes_ex(ssl->ctx->libctx, id, *id_len, 0) <= 0)
353 return 0;
354 while (SSL_has_matching_session_id(ssl, id, *id_len) &&
355 (++retry < MAX_SESS_ID_ATTEMPTS)) ;
356 if (retry < MAX_SESS_ID_ATTEMPTS)
357 return 1;
358 /* else - woops a session_id match */
359 /*
360 * XXX We should also check the external cache -- but the probability of
361 * a collision is negligible, and we could not prevent the concurrent
362 * creation of sessions with identical IDs since we currently don't have
363 * means to atomically check whether a session ID already exists and make
364 * a reservation for it if it does not (this problem applies to the
365 * internal cache as well).
366 */
367 return 0;
368 }
369
ssl_generate_session_id(SSL * s,SSL_SESSION * ss)370 int ssl_generate_session_id(SSL *s, SSL_SESSION *ss)
371 {
372 unsigned int tmp;
373 GEN_SESSION_CB cb = def_generate_session_id;
374
375 switch (s->version) {
376 case SSL3_VERSION:
377 case TLS1_VERSION:
378 case TLS1_1_VERSION:
379 case TLS1_2_VERSION:
380 case TLS1_3_VERSION:
381 case DTLS1_BAD_VER:
382 case DTLS1_VERSION:
383 case DTLS1_2_VERSION:
384 ss->session_id_length = SSL3_SSL_SESSION_ID_LENGTH;
385 break;
386 default:
387 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_UNSUPPORTED_SSL_VERSION);
388 return 0;
389 }
390
391 /*-
392 * If RFC5077 ticket, use empty session ID (as server).
393 * Note that:
394 * (a) ssl_get_prev_session() does lookahead into the
395 * ClientHello extensions to find the session ticket.
396 * When ssl_get_prev_session() fails, statem_srvr.c calls
397 * ssl_get_new_session() in tls_process_client_hello().
398 * At that point, it has not yet parsed the extensions,
399 * however, because of the lookahead, it already knows
400 * whether a ticket is expected or not.
401 *
402 * (b) statem_clnt.c calls ssl_get_new_session() before parsing
403 * ServerHello extensions, and before recording the session
404 * ID received from the server, so this block is a noop.
405 */
406 if (s->ext.ticket_expected) {
407 ss->session_id_length = 0;
408 return 1;
409 }
410
411 /* Choose which callback will set the session ID */
412 if (!CRYPTO_THREAD_read_lock(s->lock))
413 return 0;
414 if (!CRYPTO_THREAD_read_lock(s->session_ctx->lock)) {
415 CRYPTO_THREAD_unlock(s->lock);
416 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
417 SSL_R_SESSION_ID_CONTEXT_UNINITIALIZED);
418 return 0;
419 }
420 if (s->generate_session_id)
421 cb = s->generate_session_id;
422 else if (s->session_ctx->generate_session_id)
423 cb = s->session_ctx->generate_session_id;
424 CRYPTO_THREAD_unlock(s->session_ctx->lock);
425 CRYPTO_THREAD_unlock(s->lock);
426 /* Choose a session ID */
427 memset(ss->session_id, 0, ss->session_id_length);
428 tmp = (int)ss->session_id_length;
429 if (!cb(s, ss->session_id, &tmp)) {
430 /* The callback failed */
431 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
432 SSL_R_SSL_SESSION_ID_CALLBACK_FAILED);
433 return 0;
434 }
435 /*
436 * Don't allow the callback to set the session length to zero. nor
437 * set it higher than it was.
438 */
439 if (tmp == 0 || tmp > ss->session_id_length) {
440 /* The callback set an illegal length */
441 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
442 SSL_R_SSL_SESSION_ID_HAS_BAD_LENGTH);
443 return 0;
444 }
445 ss->session_id_length = tmp;
446 /* Finally, check for a conflict */
447 if (SSL_has_matching_session_id(s, ss->session_id,
448 (unsigned int)ss->session_id_length)) {
449 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_SSL_SESSION_ID_CONFLICT);
450 return 0;
451 }
452
453 return 1;
454 }
455
ssl_get_new_session(SSL * s,int session)456 int ssl_get_new_session(SSL *s, int session)
457 {
458 /* This gets used by clients and servers. */
459
460 SSL_SESSION *ss = NULL;
461
462 if ((ss = SSL_SESSION_new()) == NULL) {
463 SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_MALLOC_FAILURE);
464 return 0;
465 }
466
467 /* If the context has a default timeout, use it */
468 if (s->session_ctx->session_timeout == 0)
469 ss->timeout = SSL_get_default_timeout(s);
470 else
471 ss->timeout = s->session_ctx->session_timeout;
472 ssl_session_calculate_timeout(ss);
473
474 SSL_SESSION_free(s->session);
475 s->session = NULL;
476
477 if (session) {
478 if (SSL_IS_TLS13(s)) {
479 /*
480 * We generate the session id while constructing the
481 * NewSessionTicket in TLSv1.3.
482 */
483 ss->session_id_length = 0;
484 } else if (!ssl_generate_session_id(s, ss)) {
485 /* SSLfatal() already called */
486 SSL_SESSION_free(ss);
487 return 0;
488 }
489
490 } else {
491 ss->session_id_length = 0;
492 }
493
494 if (s->sid_ctx_length > sizeof(ss->sid_ctx)) {
495 SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
496 SSL_SESSION_free(ss);
497 return 0;
498 }
499 memcpy(ss->sid_ctx, s->sid_ctx, s->sid_ctx_length);
500 ss->sid_ctx_length = s->sid_ctx_length;
501 s->session = ss;
502 ss->ssl_version = s->version;
503 ss->verify_result = X509_V_OK;
504
505 /* If client supports extended master secret set it in session */
506 if (s->s3.flags & TLS1_FLAGS_RECEIVED_EXTMS)
507 ss->flags |= SSL_SESS_FLAG_EXTMS;
508
509 return 1;
510 }
511
lookup_sess_in_cache(SSL * s,const unsigned char * sess_id,size_t sess_id_len)512 SSL_SESSION *lookup_sess_in_cache(SSL *s, const unsigned char *sess_id,
513 size_t sess_id_len)
514 {
515 SSL_SESSION *ret = NULL;
516
517 if ((s->session_ctx->session_cache_mode
518 & SSL_SESS_CACHE_NO_INTERNAL_LOOKUP) == 0) {
519 SSL_SESSION data;
520
521 data.ssl_version = s->version;
522 if (!ossl_assert(sess_id_len <= SSL_MAX_SSL_SESSION_ID_LENGTH))
523 return NULL;
524
525 memcpy(data.session_id, sess_id, sess_id_len);
526 data.session_id_length = sess_id_len;
527
528 if (!CRYPTO_THREAD_read_lock(s->session_ctx->lock))
529 return NULL;
530 ret = lh_SSL_SESSION_retrieve(s->session_ctx->sessions, &data);
531 if (ret != NULL) {
532 /* don't allow other threads to steal it: */
533 SSL_SESSION_up_ref(ret);
534 }
535 CRYPTO_THREAD_unlock(s->session_ctx->lock);
536 if (ret == NULL)
537 ssl_tsan_counter(s->session_ctx, &s->session_ctx->stats.sess_miss);
538 }
539
540 if (ret == NULL && s->session_ctx->get_session_cb != NULL) {
541 int copy = 1;
542
543 ret = s->session_ctx->get_session_cb(s, sess_id, sess_id_len, ©);
544
545 if (ret != NULL) {
546 if (ret->not_resumable) {
547 /* If its not resumable then ignore this session */
548 if (!copy)
549 SSL_SESSION_free(ret);
550 return NULL;
551 }
552 ssl_tsan_counter(s->session_ctx,
553 &s->session_ctx->stats.sess_cb_hit);
554
555 /*
556 * Increment reference count now if the session callback asks us
557 * to do so (note that if the session structures returned by the
558 * callback are shared between threads, it must handle the
559 * reference count itself [i.e. copy == 0], or things won't be
560 * thread-safe).
561 */
562 if (copy)
563 SSL_SESSION_up_ref(ret);
564
565 /*
566 * Add the externally cached session to the internal cache as
567 * well if and only if we are supposed to.
568 */
569 if ((s->session_ctx->session_cache_mode &
570 SSL_SESS_CACHE_NO_INTERNAL_STORE) == 0) {
571 /*
572 * Either return value of SSL_CTX_add_session should not
573 * interrupt the session resumption process. The return
574 * value is intentionally ignored.
575 */
576 (void)SSL_CTX_add_session(s->session_ctx, ret);
577 }
578 }
579 }
580
581 return ret;
582 }
583
584 /*-
585 * ssl_get_prev attempts to find an SSL_SESSION to be used to resume this
586 * connection. It is only called by servers.
587 *
588 * hello: The parsed ClientHello data
589 *
590 * Returns:
591 * -1: fatal error
592 * 0: no session found
593 * 1: a session may have been found.
594 *
595 * Side effects:
596 * - If a session is found then s->session is pointed at it (after freeing an
597 * existing session if need be) and s->verify_result is set from the session.
598 * - Both for new and resumed sessions, s->ext.ticket_expected is set to 1
599 * if the server should issue a new session ticket (to 0 otherwise).
600 */
ssl_get_prev_session(SSL * s,CLIENTHELLO_MSG * hello)601 int ssl_get_prev_session(SSL *s, CLIENTHELLO_MSG *hello)
602 {
603 /* This is used only by servers. */
604
605 SSL_SESSION *ret = NULL;
606 int fatal = 0;
607 int try_session_cache = 0;
608 SSL_TICKET_STATUS r;
609
610 if (SSL_IS_TLS13(s)) {
611 /*
612 * By default we will send a new ticket. This can be overridden in the
613 * ticket processing.
614 */
615 s->ext.ticket_expected = 1;
616 if (!tls_parse_extension(s, TLSEXT_IDX_psk_kex_modes,
617 SSL_EXT_CLIENT_HELLO, hello->pre_proc_exts,
618 NULL, 0)
619 || !tls_parse_extension(s, TLSEXT_IDX_psk, SSL_EXT_CLIENT_HELLO,
620 hello->pre_proc_exts, NULL, 0))
621 return -1;
622
623 ret = s->session;
624 } else {
625 /* sets s->ext.ticket_expected */
626 r = tls_get_ticket_from_client(s, hello, &ret);
627 switch (r) {
628 case SSL_TICKET_FATAL_ERR_MALLOC:
629 case SSL_TICKET_FATAL_ERR_OTHER:
630 fatal = 1;
631 SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
632 goto err;
633 case SSL_TICKET_NONE:
634 case SSL_TICKET_EMPTY:
635 if (hello->session_id_len > 0) {
636 try_session_cache = 1;
637 ret = lookup_sess_in_cache(s, hello->session_id,
638 hello->session_id_len);
639 }
640 break;
641 case SSL_TICKET_NO_DECRYPT:
642 case SSL_TICKET_SUCCESS:
643 case SSL_TICKET_SUCCESS_RENEW:
644 break;
645 }
646 }
647
648 if (ret == NULL)
649 goto err;
650
651 /* Now ret is non-NULL and we own one of its reference counts. */
652
653 /* Check TLS version consistency */
654 if (ret->ssl_version != s->version)
655 goto err;
656
657 if (ret->sid_ctx_length != s->sid_ctx_length
658 || memcmp(ret->sid_ctx, s->sid_ctx, ret->sid_ctx_length)) {
659 /*
660 * We have the session requested by the client, but we don't want to
661 * use it in this context.
662 */
663 goto err; /* treat like cache miss */
664 }
665
666 if ((s->verify_mode & SSL_VERIFY_PEER) && s->sid_ctx_length == 0) {
667 /*
668 * We can't be sure if this session is being used out of context,
669 * which is especially important for SSL_VERIFY_PEER. The application
670 * should have used SSL[_CTX]_set_session_id_context. For this error
671 * case, we generate an error instead of treating the event like a
672 * cache miss (otherwise it would be easy for applications to
673 * effectively disable the session cache by accident without anyone
674 * noticing).
675 */
676
677 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
678 SSL_R_SESSION_ID_CONTEXT_UNINITIALIZED);
679 fatal = 1;
680 goto err;
681 }
682
683 if (sess_timedout(time(NULL), ret)) {
684 ssl_tsan_counter(s->session_ctx, &s->session_ctx->stats.sess_timeout);
685 if (try_session_cache) {
686 /* session was from the cache, so remove it */
687 SSL_CTX_remove_session(s->session_ctx, ret);
688 }
689 goto err;
690 }
691
692 /* Check extended master secret extension consistency */
693 if (ret->flags & SSL_SESS_FLAG_EXTMS) {
694 /* If old session includes extms, but new does not: abort handshake */
695 if (!(s->s3.flags & TLS1_FLAGS_RECEIVED_EXTMS)) {
696 SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_INCONSISTENT_EXTMS);
697 fatal = 1;
698 goto err;
699 }
700 } else if (s->s3.flags & TLS1_FLAGS_RECEIVED_EXTMS) {
701 /* If new session includes extms, but old does not: do not resume */
702 goto err;
703 }
704
705 if (!SSL_IS_TLS13(s)) {
706 /* We already did this for TLS1.3 */
707 SSL_SESSION_free(s->session);
708 s->session = ret;
709 }
710
711 ssl_tsan_counter(s->session_ctx, &s->session_ctx->stats.sess_hit);
712 s->verify_result = s->session->verify_result;
713 return 1;
714
715 err:
716 if (ret != NULL) {
717 SSL_SESSION_free(ret);
718 /* In TLSv1.3 s->session was already set to ret, so we NULL it out */
719 if (SSL_IS_TLS13(s))
720 s->session = NULL;
721
722 if (!try_session_cache) {
723 /*
724 * The session was from a ticket, so we should issue a ticket for
725 * the new session
726 */
727 s->ext.ticket_expected = 1;
728 }
729 }
730 if (fatal)
731 return -1;
732
733 return 0;
734 }
735
SSL_CTX_add_session(SSL_CTX * ctx,SSL_SESSION * c)736 int SSL_CTX_add_session(SSL_CTX *ctx, SSL_SESSION *c)
737 {
738 int ret = 0;
739 SSL_SESSION *s;
740
741 /*
742 * add just 1 reference count for the SSL_CTX's session cache even though
743 * it has two ways of access: each session is in a doubly linked list and
744 * an lhash
745 */
746 SSL_SESSION_up_ref(c);
747 /*
748 * if session c is in already in cache, we take back the increment later
749 */
750
751 if (!CRYPTO_THREAD_write_lock(ctx->lock)) {
752 SSL_SESSION_free(c);
753 return 0;
754 }
755 s = lh_SSL_SESSION_insert(ctx->sessions, c);
756
757 /*
758 * s != NULL iff we already had a session with the given PID. In this
759 * case, s == c should hold (then we did not really modify
760 * ctx->sessions), or we're in trouble.
761 */
762 if (s != NULL && s != c) {
763 /* We *are* in trouble ... */
764 SSL_SESSION_list_remove(ctx, s);
765 SSL_SESSION_free(s);
766 /*
767 * ... so pretend the other session did not exist in cache (we cannot
768 * handle two SSL_SESSION structures with identical session ID in the
769 * same cache, which could happen e.g. when two threads concurrently
770 * obtain the same session from an external cache)
771 */
772 s = NULL;
773 } else if (s == NULL &&
774 lh_SSL_SESSION_retrieve(ctx->sessions, c) == NULL) {
775 /* s == NULL can also mean OOM error in lh_SSL_SESSION_insert ... */
776
777 /*
778 * ... so take back the extra reference and also don't add
779 * the session to the SSL_SESSION_list at this time
780 */
781 s = c;
782 }
783
784 /* Adjust last used time, and add back into the cache at the appropriate spot */
785 if (ctx->session_cache_mode & SSL_SESS_CACHE_UPDATE_TIME) {
786 c->time = time(NULL);
787 ssl_session_calculate_timeout(c);
788 }
789
790 if (s == NULL) {
791 /*
792 * new cache entry -- remove old ones if cache has become too large
793 * delete cache entry *before* add, so we don't remove the one we're adding!
794 */
795
796 ret = 1;
797
798 if (SSL_CTX_sess_get_cache_size(ctx) > 0) {
799 while (SSL_CTX_sess_number(ctx) >= SSL_CTX_sess_get_cache_size(ctx)) {
800 if (!remove_session_lock(ctx, ctx->session_cache_tail, 0))
801 break;
802 else
803 ssl_tsan_counter(ctx, &ctx->stats.sess_cache_full);
804 }
805 }
806 }
807
808 SSL_SESSION_list_add(ctx, c);
809
810 if (s != NULL) {
811 /*
812 * existing cache entry -- decrement previously incremented reference
813 * count because it already takes into account the cache
814 */
815
816 SSL_SESSION_free(s); /* s == c */
817 ret = 0;
818 }
819 CRYPTO_THREAD_unlock(ctx->lock);
820 return ret;
821 }
822
SSL_CTX_remove_session(SSL_CTX * ctx,SSL_SESSION * c)823 int SSL_CTX_remove_session(SSL_CTX *ctx, SSL_SESSION *c)
824 {
825 return remove_session_lock(ctx, c, 1);
826 }
827
remove_session_lock(SSL_CTX * ctx,SSL_SESSION * c,int lck)828 static int remove_session_lock(SSL_CTX *ctx, SSL_SESSION *c, int lck)
829 {
830 SSL_SESSION *r;
831 int ret = 0;
832
833 if ((c != NULL) && (c->session_id_length != 0)) {
834 if (lck) {
835 if (!CRYPTO_THREAD_write_lock(ctx->lock))
836 return 0;
837 }
838 if ((r = lh_SSL_SESSION_retrieve(ctx->sessions, c)) != NULL) {
839 ret = 1;
840 r = lh_SSL_SESSION_delete(ctx->sessions, r);
841 SSL_SESSION_list_remove(ctx, r);
842 }
843 c->not_resumable = 1;
844
845 if (lck)
846 CRYPTO_THREAD_unlock(ctx->lock);
847
848 if (ctx->remove_session_cb != NULL)
849 ctx->remove_session_cb(ctx, c);
850
851 if (ret)
852 SSL_SESSION_free(r);
853 }
854 return ret;
855 }
856
SSL_SESSION_free(SSL_SESSION * ss)857 void SSL_SESSION_free(SSL_SESSION *ss)
858 {
859 int i;
860
861 if (ss == NULL)
862 return;
863 CRYPTO_DOWN_REF(&ss->references, &i, ss->lock);
864 REF_PRINT_COUNT("SSL_SESSION", ss);
865 if (i > 0)
866 return;
867 REF_ASSERT_ISNT(i < 0);
868
869 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_SESSION, ss, &ss->ex_data);
870
871 OPENSSL_cleanse(ss->master_key, sizeof(ss->master_key));
872 OPENSSL_cleanse(ss->session_id, sizeof(ss->session_id));
873 X509_free(ss->peer);
874 sk_X509_pop_free(ss->peer_chain, X509_free);
875 OPENSSL_free(ss->ext.hostname);
876 OPENSSL_free(ss->ext.tick);
877 #ifndef OPENSSL_NO_PSK
878 OPENSSL_free(ss->psk_identity_hint);
879 OPENSSL_free(ss->psk_identity);
880 #endif
881 #ifndef OPENSSL_NO_SRP
882 OPENSSL_free(ss->srp_username);
883 #endif
884 OPENSSL_free(ss->ext.alpn_selected);
885 OPENSSL_free(ss->ticket_appdata);
886 CRYPTO_THREAD_lock_free(ss->lock);
887 OPENSSL_clear_free(ss, sizeof(*ss));
888 }
889
SSL_SESSION_up_ref(SSL_SESSION * ss)890 int SSL_SESSION_up_ref(SSL_SESSION *ss)
891 {
892 int i;
893
894 if (CRYPTO_UP_REF(&ss->references, &i, ss->lock) <= 0)
895 return 0;
896
897 REF_PRINT_COUNT("SSL_SESSION", ss);
898 REF_ASSERT_ISNT(i < 2);
899 return ((i > 1) ? 1 : 0);
900 }
901
SSL_set_session(SSL * s,SSL_SESSION * session)902 int SSL_set_session(SSL *s, SSL_SESSION *session)
903 {
904 ssl_clear_bad_session(s);
905 if (s->ctx->method != s->method) {
906 if (!SSL_set_ssl_method(s, s->ctx->method))
907 return 0;
908 }
909
910 if (session != NULL) {
911 SSL_SESSION_up_ref(session);
912 s->verify_result = session->verify_result;
913 }
914 SSL_SESSION_free(s->session);
915 s->session = session;
916
917 return 1;
918 }
919
SSL_SESSION_set1_id(SSL_SESSION * s,const unsigned char * sid,unsigned int sid_len)920 int SSL_SESSION_set1_id(SSL_SESSION *s, const unsigned char *sid,
921 unsigned int sid_len)
922 {
923 if (sid_len > SSL_MAX_SSL_SESSION_ID_LENGTH) {
924 ERR_raise(ERR_LIB_SSL, SSL_R_SSL_SESSION_ID_TOO_LONG);
925 return 0;
926 }
927 s->session_id_length = sid_len;
928 if (sid != s->session_id)
929 memcpy(s->session_id, sid, sid_len);
930 return 1;
931 }
932
SSL_SESSION_set_timeout(SSL_SESSION * s,long t)933 long SSL_SESSION_set_timeout(SSL_SESSION *s, long t)
934 {
935 time_t new_timeout = (time_t)t;
936
937 if (s == NULL || t < 0)
938 return 0;
939 if (s->owner != NULL) {
940 if (!CRYPTO_THREAD_write_lock(s->owner->lock))
941 return 0;
942 s->timeout = new_timeout;
943 ssl_session_calculate_timeout(s);
944 SSL_SESSION_list_add(s->owner, s);
945 CRYPTO_THREAD_unlock(s->owner->lock);
946 } else {
947 s->timeout = new_timeout;
948 ssl_session_calculate_timeout(s);
949 }
950 return 1;
951 }
952
SSL_SESSION_get_timeout(const SSL_SESSION * s)953 long SSL_SESSION_get_timeout(const SSL_SESSION *s)
954 {
955 if (s == NULL)
956 return 0;
957 return (long)s->timeout;
958 }
959
SSL_SESSION_get_time(const SSL_SESSION * s)960 long SSL_SESSION_get_time(const SSL_SESSION *s)
961 {
962 if (s == NULL)
963 return 0;
964 return (long)s->time;
965 }
966
SSL_SESSION_set_time(SSL_SESSION * s,long t)967 long SSL_SESSION_set_time(SSL_SESSION *s, long t)
968 {
969 time_t new_time = (time_t)t;
970
971 if (s == NULL)
972 return 0;
973 if (s->owner != NULL) {
974 if (!CRYPTO_THREAD_write_lock(s->owner->lock))
975 return 0;
976 s->time = new_time;
977 ssl_session_calculate_timeout(s);
978 SSL_SESSION_list_add(s->owner, s);
979 CRYPTO_THREAD_unlock(s->owner->lock);
980 } else {
981 s->time = new_time;
982 ssl_session_calculate_timeout(s);
983 }
984 return t;
985 }
986
SSL_SESSION_get_protocol_version(const SSL_SESSION * s)987 int SSL_SESSION_get_protocol_version(const SSL_SESSION *s)
988 {
989 return s->ssl_version;
990 }
991
SSL_SESSION_set_protocol_version(SSL_SESSION * s,int version)992 int SSL_SESSION_set_protocol_version(SSL_SESSION *s, int version)
993 {
994 s->ssl_version = version;
995 return 1;
996 }
997
SSL_SESSION_get0_cipher(const SSL_SESSION * s)998 const SSL_CIPHER *SSL_SESSION_get0_cipher(const SSL_SESSION *s)
999 {
1000 return s->cipher;
1001 }
1002
SSL_SESSION_set_cipher(SSL_SESSION * s,const SSL_CIPHER * cipher)1003 int SSL_SESSION_set_cipher(SSL_SESSION *s, const SSL_CIPHER *cipher)
1004 {
1005 s->cipher = cipher;
1006 return 1;
1007 }
1008
SSL_SESSION_get0_hostname(const SSL_SESSION * s)1009 const char *SSL_SESSION_get0_hostname(const SSL_SESSION *s)
1010 {
1011 return s->ext.hostname;
1012 }
1013
SSL_SESSION_set1_hostname(SSL_SESSION * s,const char * hostname)1014 int SSL_SESSION_set1_hostname(SSL_SESSION *s, const char *hostname)
1015 {
1016 OPENSSL_free(s->ext.hostname);
1017 if (hostname == NULL) {
1018 s->ext.hostname = NULL;
1019 return 1;
1020 }
1021 s->ext.hostname = OPENSSL_strdup(hostname);
1022
1023 return s->ext.hostname != NULL;
1024 }
1025
SSL_SESSION_has_ticket(const SSL_SESSION * s)1026 int SSL_SESSION_has_ticket(const SSL_SESSION *s)
1027 {
1028 return (s->ext.ticklen > 0) ? 1 : 0;
1029 }
1030
SSL_SESSION_get_ticket_lifetime_hint(const SSL_SESSION * s)1031 unsigned long SSL_SESSION_get_ticket_lifetime_hint(const SSL_SESSION *s)
1032 {
1033 return s->ext.tick_lifetime_hint;
1034 }
1035
SSL_SESSION_get0_ticket(const SSL_SESSION * s,const unsigned char ** tick,size_t * len)1036 void SSL_SESSION_get0_ticket(const SSL_SESSION *s, const unsigned char **tick,
1037 size_t *len)
1038 {
1039 *len = s->ext.ticklen;
1040 if (tick != NULL)
1041 *tick = s->ext.tick;
1042 }
1043
SSL_SESSION_get_max_early_data(const SSL_SESSION * s)1044 uint32_t SSL_SESSION_get_max_early_data(const SSL_SESSION *s)
1045 {
1046 return s->ext.max_early_data;
1047 }
1048
SSL_SESSION_set_max_early_data(SSL_SESSION * s,uint32_t max_early_data)1049 int SSL_SESSION_set_max_early_data(SSL_SESSION *s, uint32_t max_early_data)
1050 {
1051 s->ext.max_early_data = max_early_data;
1052
1053 return 1;
1054 }
1055
SSL_SESSION_get0_alpn_selected(const SSL_SESSION * s,const unsigned char ** alpn,size_t * len)1056 void SSL_SESSION_get0_alpn_selected(const SSL_SESSION *s,
1057 const unsigned char **alpn,
1058 size_t *len)
1059 {
1060 *alpn = s->ext.alpn_selected;
1061 *len = s->ext.alpn_selected_len;
1062 }
1063
SSL_SESSION_set1_alpn_selected(SSL_SESSION * s,const unsigned char * alpn,size_t len)1064 int SSL_SESSION_set1_alpn_selected(SSL_SESSION *s, const unsigned char *alpn,
1065 size_t len)
1066 {
1067 OPENSSL_free(s->ext.alpn_selected);
1068 if (alpn == NULL || len == 0) {
1069 s->ext.alpn_selected = NULL;
1070 s->ext.alpn_selected_len = 0;
1071 return 1;
1072 }
1073 s->ext.alpn_selected = OPENSSL_memdup(alpn, len);
1074 if (s->ext.alpn_selected == NULL) {
1075 s->ext.alpn_selected_len = 0;
1076 return 0;
1077 }
1078 s->ext.alpn_selected_len = len;
1079
1080 return 1;
1081 }
1082
SSL_SESSION_get0_peer(SSL_SESSION * s)1083 X509 *SSL_SESSION_get0_peer(SSL_SESSION *s)
1084 {
1085 return s->peer;
1086 }
1087
SSL_SESSION_set1_id_context(SSL_SESSION * s,const unsigned char * sid_ctx,unsigned int sid_ctx_len)1088 int SSL_SESSION_set1_id_context(SSL_SESSION *s, const unsigned char *sid_ctx,
1089 unsigned int sid_ctx_len)
1090 {
1091 if (sid_ctx_len > SSL_MAX_SID_CTX_LENGTH) {
1092 ERR_raise(ERR_LIB_SSL, SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
1093 return 0;
1094 }
1095 s->sid_ctx_length = sid_ctx_len;
1096 if (sid_ctx != s->sid_ctx)
1097 memcpy(s->sid_ctx, sid_ctx, sid_ctx_len);
1098
1099 return 1;
1100 }
1101
SSL_SESSION_is_resumable(const SSL_SESSION * s)1102 int SSL_SESSION_is_resumable(const SSL_SESSION *s)
1103 {
1104 /*
1105 * In the case of EAP-FAST, we can have a pre-shared "ticket" without a
1106 * session ID.
1107 */
1108 return !s->not_resumable
1109 && (s->session_id_length > 0 || s->ext.ticklen > 0);
1110 }
1111
SSL_CTX_set_timeout(SSL_CTX * s,long t)1112 long SSL_CTX_set_timeout(SSL_CTX *s, long t)
1113 {
1114 long l;
1115 if (s == NULL)
1116 return 0;
1117 l = s->session_timeout;
1118 s->session_timeout = t;
1119 return l;
1120 }
1121
SSL_CTX_get_timeout(const SSL_CTX * s)1122 long SSL_CTX_get_timeout(const SSL_CTX *s)
1123 {
1124 if (s == NULL)
1125 return 0;
1126 return s->session_timeout;
1127 }
1128
SSL_set_session_secret_cb(SSL * s,tls_session_secret_cb_fn tls_session_secret_cb,void * arg)1129 int SSL_set_session_secret_cb(SSL *s,
1130 tls_session_secret_cb_fn tls_session_secret_cb,
1131 void *arg)
1132 {
1133 if (s == NULL)
1134 return 0;
1135 s->ext.session_secret_cb = tls_session_secret_cb;
1136 s->ext.session_secret_cb_arg = arg;
1137 return 1;
1138 }
1139
SSL_set_session_ticket_ext_cb(SSL * s,tls_session_ticket_ext_cb_fn cb,void * arg)1140 int SSL_set_session_ticket_ext_cb(SSL *s, tls_session_ticket_ext_cb_fn cb,
1141 void *arg)
1142 {
1143 if (s == NULL)
1144 return 0;
1145 s->ext.session_ticket_cb = cb;
1146 s->ext.session_ticket_cb_arg = arg;
1147 return 1;
1148 }
1149
SSL_set_session_ticket_ext(SSL * s,void * ext_data,int ext_len)1150 int SSL_set_session_ticket_ext(SSL *s, void *ext_data, int ext_len)
1151 {
1152 if (s->version >= TLS1_VERSION) {
1153 OPENSSL_free(s->ext.session_ticket);
1154 s->ext.session_ticket = NULL;
1155 s->ext.session_ticket =
1156 OPENSSL_malloc(sizeof(TLS_SESSION_TICKET_EXT) + ext_len);
1157 if (s->ext.session_ticket == NULL) {
1158 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
1159 return 0;
1160 }
1161
1162 if (ext_data != NULL) {
1163 s->ext.session_ticket->length = ext_len;
1164 s->ext.session_ticket->data = s->ext.session_ticket + 1;
1165 memcpy(s->ext.session_ticket->data, ext_data, ext_len);
1166 } else {
1167 s->ext.session_ticket->length = 0;
1168 s->ext.session_ticket->data = NULL;
1169 }
1170
1171 return 1;
1172 }
1173
1174 return 0;
1175 }
1176
SSL_CTX_flush_sessions(SSL_CTX * s,long t)1177 void SSL_CTX_flush_sessions(SSL_CTX *s, long t)
1178 {
1179 STACK_OF(SSL_SESSION) *sk;
1180 SSL_SESSION *current;
1181 unsigned long i;
1182
1183 if (!CRYPTO_THREAD_write_lock(s->lock))
1184 return;
1185
1186 sk = sk_SSL_SESSION_new_null();
1187 i = lh_SSL_SESSION_get_down_load(s->sessions);
1188 lh_SSL_SESSION_set_down_load(s->sessions, 0);
1189
1190 /*
1191 * Iterate over the list from the back (oldest), and stop
1192 * when a session can no longer be removed.
1193 * Add the session to a temporary list to be freed outside
1194 * the SSL_CTX lock.
1195 * But still do the remove_session_cb() within the lock.
1196 */
1197 while (s->session_cache_tail != NULL) {
1198 current = s->session_cache_tail;
1199 if (t == 0 || sess_timedout((time_t)t, current)) {
1200 lh_SSL_SESSION_delete(s->sessions, current);
1201 SSL_SESSION_list_remove(s, current);
1202 current->not_resumable = 1;
1203 if (s->remove_session_cb != NULL)
1204 s->remove_session_cb(s, current);
1205 /*
1206 * Throw the session on a stack, it's entirely plausible
1207 * that while freeing outside the critical section, the
1208 * session could be re-added, so avoid using the next/prev
1209 * pointers. If the stack failed to create, or the session
1210 * couldn't be put on the stack, just free it here
1211 */
1212 if (sk == NULL || !sk_SSL_SESSION_push(sk, current))
1213 SSL_SESSION_free(current);
1214 } else {
1215 break;
1216 }
1217 }
1218
1219 lh_SSL_SESSION_set_down_load(s->sessions, i);
1220 CRYPTO_THREAD_unlock(s->lock);
1221
1222 sk_SSL_SESSION_pop_free(sk, SSL_SESSION_free);
1223 }
1224
ssl_clear_bad_session(SSL * s)1225 int ssl_clear_bad_session(SSL *s)
1226 {
1227 if ((s->session != NULL) &&
1228 !(s->shutdown & SSL_SENT_SHUTDOWN) &&
1229 !(SSL_in_init(s) || SSL_in_before(s))) {
1230 SSL_CTX_remove_session(s->session_ctx, s->session);
1231 return 1;
1232 } else
1233 return 0;
1234 }
1235
1236 /* locked by SSL_CTX in the calling function */
SSL_SESSION_list_remove(SSL_CTX * ctx,SSL_SESSION * s)1237 static void SSL_SESSION_list_remove(SSL_CTX *ctx, SSL_SESSION *s)
1238 {
1239 if ((s->next == NULL) || (s->prev == NULL))
1240 return;
1241
1242 if (s->next == (SSL_SESSION *)&(ctx->session_cache_tail)) {
1243 /* last element in list */
1244 if (s->prev == (SSL_SESSION *)&(ctx->session_cache_head)) {
1245 /* only one element in list */
1246 ctx->session_cache_head = NULL;
1247 ctx->session_cache_tail = NULL;
1248 } else {
1249 ctx->session_cache_tail = s->prev;
1250 s->prev->next = (SSL_SESSION *)&(ctx->session_cache_tail);
1251 }
1252 } else {
1253 if (s->prev == (SSL_SESSION *)&(ctx->session_cache_head)) {
1254 /* first element in list */
1255 ctx->session_cache_head = s->next;
1256 s->next->prev = (SSL_SESSION *)&(ctx->session_cache_head);
1257 } else {
1258 /* middle of list */
1259 s->next->prev = s->prev;
1260 s->prev->next = s->next;
1261 }
1262 }
1263 s->prev = s->next = NULL;
1264 s->owner = NULL;
1265 }
1266
SSL_SESSION_list_add(SSL_CTX * ctx,SSL_SESSION * s)1267 static void SSL_SESSION_list_add(SSL_CTX *ctx, SSL_SESSION *s)
1268 {
1269 SSL_SESSION *next;
1270
1271 if ((s->next != NULL) && (s->prev != NULL))
1272 SSL_SESSION_list_remove(ctx, s);
1273
1274 if (ctx->session_cache_head == NULL) {
1275 ctx->session_cache_head = s;
1276 ctx->session_cache_tail = s;
1277 s->prev = (SSL_SESSION *)&(ctx->session_cache_head);
1278 s->next = (SSL_SESSION *)&(ctx->session_cache_tail);
1279 } else {
1280 if (timeoutcmp(s, ctx->session_cache_head) >= 0) {
1281 /*
1282 * if we timeout after (or the same time as) the first
1283 * session, put us first - usual case
1284 */
1285 s->next = ctx->session_cache_head;
1286 s->next->prev = s;
1287 s->prev = (SSL_SESSION *)&(ctx->session_cache_head);
1288 ctx->session_cache_head = s;
1289 } else if (timeoutcmp(s, ctx->session_cache_tail) < 0) {
1290 /* if we timeout before the last session, put us last */
1291 s->prev = ctx->session_cache_tail;
1292 s->prev->next = s;
1293 s->next = (SSL_SESSION *)&(ctx->session_cache_tail);
1294 ctx->session_cache_tail = s;
1295 } else {
1296 /*
1297 * we timeout somewhere in-between - if there is only
1298 * one session in the cache it will be caught above
1299 */
1300 next = ctx->session_cache_head->next;
1301 while (next != (SSL_SESSION*)&(ctx->session_cache_tail)) {
1302 if (timeoutcmp(s, next) >= 0) {
1303 s->next = next;
1304 s->prev = next->prev;
1305 next->prev->next = s;
1306 next->prev = s;
1307 break;
1308 }
1309 next = next->next;
1310 }
1311 }
1312 }
1313 s->owner = ctx;
1314 }
1315
SSL_CTX_sess_set_new_cb(SSL_CTX * ctx,int (* cb)(struct ssl_st * ssl,SSL_SESSION * sess))1316 void SSL_CTX_sess_set_new_cb(SSL_CTX *ctx,
1317 int (*cb) (struct ssl_st *ssl, SSL_SESSION *sess))
1318 {
1319 ctx->new_session_cb = cb;
1320 }
1321
SSL_CTX_sess_get_new_cb(SSL_CTX * ctx)1322 int (*SSL_CTX_sess_get_new_cb(SSL_CTX *ctx)) (SSL *ssl, SSL_SESSION *sess) {
1323 return ctx->new_session_cb;
1324 }
1325
SSL_CTX_sess_set_remove_cb(SSL_CTX * ctx,void (* cb)(SSL_CTX * ctx,SSL_SESSION * sess))1326 void SSL_CTX_sess_set_remove_cb(SSL_CTX *ctx,
1327 void (*cb) (SSL_CTX *ctx, SSL_SESSION *sess))
1328 {
1329 ctx->remove_session_cb = cb;
1330 }
1331
SSL_CTX_sess_get_remove_cb(SSL_CTX * ctx)1332 void (*SSL_CTX_sess_get_remove_cb(SSL_CTX *ctx)) (SSL_CTX *ctx,
1333 SSL_SESSION *sess) {
1334 return ctx->remove_session_cb;
1335 }
1336
SSL_CTX_sess_set_get_cb(SSL_CTX * ctx,SSL_SESSION * (* cb)(struct ssl_st * ssl,const unsigned char * data,int len,int * copy))1337 void SSL_CTX_sess_set_get_cb(SSL_CTX *ctx,
1338 SSL_SESSION *(*cb) (struct ssl_st *ssl,
1339 const unsigned char *data,
1340 int len, int *copy))
1341 {
1342 ctx->get_session_cb = cb;
1343 }
1344
SSL_CTX_sess_get_get_cb(SSL_CTX * ctx)1345 SSL_SESSION *(*SSL_CTX_sess_get_get_cb(SSL_CTX *ctx)) (SSL *ssl,
1346 const unsigned char
1347 *data, int len,
1348 int *copy) {
1349 return ctx->get_session_cb;
1350 }
1351
SSL_CTX_set_info_callback(SSL_CTX * ctx,void (* cb)(const SSL * ssl,int type,int val))1352 void SSL_CTX_set_info_callback(SSL_CTX *ctx,
1353 void (*cb) (const SSL *ssl, int type, int val))
1354 {
1355 ctx->info_callback = cb;
1356 }
1357
SSL_CTX_get_info_callback(SSL_CTX * ctx)1358 void (*SSL_CTX_get_info_callback(SSL_CTX *ctx)) (const SSL *ssl, int type,
1359 int val) {
1360 return ctx->info_callback;
1361 }
1362
SSL_CTX_set_client_cert_cb(SSL_CTX * ctx,int (* cb)(SSL * ssl,X509 ** x509,EVP_PKEY ** pkey))1363 void SSL_CTX_set_client_cert_cb(SSL_CTX *ctx,
1364 int (*cb) (SSL *ssl, X509 **x509,
1365 EVP_PKEY **pkey))
1366 {
1367 ctx->client_cert_cb = cb;
1368 }
1369
SSL_CTX_get_client_cert_cb(SSL_CTX * ctx)1370 int (*SSL_CTX_get_client_cert_cb(SSL_CTX *ctx)) (SSL *ssl, X509 **x509,
1371 EVP_PKEY **pkey) {
1372 return ctx->client_cert_cb;
1373 }
1374
SSL_CTX_set_cookie_generate_cb(SSL_CTX * ctx,int (* cb)(SSL * ssl,unsigned char * cookie,unsigned int * cookie_len))1375 void SSL_CTX_set_cookie_generate_cb(SSL_CTX *ctx,
1376 int (*cb) (SSL *ssl,
1377 unsigned char *cookie,
1378 unsigned int *cookie_len))
1379 {
1380 ctx->app_gen_cookie_cb = cb;
1381 }
1382
SSL_CTX_set_cookie_verify_cb(SSL_CTX * ctx,int (* cb)(SSL * ssl,const unsigned char * cookie,unsigned int cookie_len))1383 void SSL_CTX_set_cookie_verify_cb(SSL_CTX *ctx,
1384 int (*cb) (SSL *ssl,
1385 const unsigned char *cookie,
1386 unsigned int cookie_len))
1387 {
1388 ctx->app_verify_cookie_cb = cb;
1389 }
1390
SSL_SESSION_set1_ticket_appdata(SSL_SESSION * ss,const void * data,size_t len)1391 int SSL_SESSION_set1_ticket_appdata(SSL_SESSION *ss, const void *data, size_t len)
1392 {
1393 OPENSSL_free(ss->ticket_appdata);
1394 ss->ticket_appdata_len = 0;
1395 if (data == NULL || len == 0) {
1396 ss->ticket_appdata = NULL;
1397 return 1;
1398 }
1399 ss->ticket_appdata = OPENSSL_memdup(data, len);
1400 if (ss->ticket_appdata != NULL) {
1401 ss->ticket_appdata_len = len;
1402 return 1;
1403 }
1404 return 0;
1405 }
1406
SSL_SESSION_get0_ticket_appdata(SSL_SESSION * ss,void ** data,size_t * len)1407 int SSL_SESSION_get0_ticket_appdata(SSL_SESSION *ss, void **data, size_t *len)
1408 {
1409 *data = ss->ticket_appdata;
1410 *len = ss->ticket_appdata_len;
1411 return 1;
1412 }
1413
SSL_CTX_set_stateless_cookie_generate_cb(SSL_CTX * ctx,int (* cb)(SSL * ssl,unsigned char * cookie,size_t * cookie_len))1414 void SSL_CTX_set_stateless_cookie_generate_cb(
1415 SSL_CTX *ctx,
1416 int (*cb) (SSL *ssl,
1417 unsigned char *cookie,
1418 size_t *cookie_len))
1419 {
1420 ctx->gen_stateless_cookie_cb = cb;
1421 }
1422
SSL_CTX_set_stateless_cookie_verify_cb(SSL_CTX * ctx,int (* cb)(SSL * ssl,const unsigned char * cookie,size_t cookie_len))1423 void SSL_CTX_set_stateless_cookie_verify_cb(
1424 SSL_CTX *ctx,
1425 int (*cb) (SSL *ssl,
1426 const unsigned char *cookie,
1427 size_t cookie_len))
1428 {
1429 ctx->verify_stateless_cookie_cb = cb;
1430 }
1431
1432 IMPLEMENT_PEM_rw(SSL_SESSION, SSL_SESSION, PEM_STRING_SSL_SESSION, SSL_SESSION)
1433