2 * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the OpenSSL license (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
10 /* ====================================================================
11 * Copyright 2005 Nokia. All rights reserved.
13 * The portions of the attached software ("Contribution") is developed by
14 * Nokia Corporation and is licensed pursuant to the OpenSSL open source
17 * The Contribution, originally written by Mika Kousa and Pasi Eronen of
18 * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
19 * support (see RFC 4279) to OpenSSL.
21 * No patent licenses or other rights except those expressly stated in
22 * the OpenSSL open source license shall be deemed granted or received
23 * expressly, by implication, estoppel, or otherwise.
25 * No assurances are provided by Nokia that the Contribution does not
26 * infringe the patent or other intellectual property rights of any third
27 * party or that the license provides you with all the necessary rights
28 * to make use of the Contribution.
30 * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
31 * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
32 * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
33 * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
38 #include <openssl/lhash.h>
39 #include <openssl/rand.h>
40 #include <openssl/engine.h>
43 static void SSL_SESSION_list_remove(SSL_CTX
*ctx
, SSL_SESSION
*s
);
44 static void SSL_SESSION_list_add(SSL_CTX
*ctx
, SSL_SESSION
*s
);
45 static int remove_session_lock(SSL_CTX
*ctx
, SSL_SESSION
*c
, int lck
);
47 SSL_SESSION
*SSL_get_session(const SSL
*ssl
)
48 /* aka SSL_get0_session; gets 0 objects, just returns a copy of the pointer */
50 return (ssl
->session
);
53 SSL_SESSION
*SSL_get1_session(SSL
*ssl
)
54 /* variant of SSL_get_session: caller really gets something */
58 * Need to lock this all up rather than just use CRYPTO_add so that
59 * somebody doesn't free ssl->session between when we check it's non-null
60 * and when we up the reference count.
62 CRYPTO_THREAD_read_lock(ssl
->lock
);
65 SSL_SESSION_up_ref(sess
);
66 CRYPTO_THREAD_unlock(ssl
->lock
);
70 int SSL_SESSION_set_ex_data(SSL_SESSION
*s
, int idx
, void *arg
)
72 return (CRYPTO_set_ex_data(&s
->ex_data
, idx
, arg
));
75 void *SSL_SESSION_get_ex_data(const SSL_SESSION
*s
, int idx
)
77 return (CRYPTO_get_ex_data(&s
->ex_data
, idx
));
80 SSL_SESSION
*SSL_SESSION_new(void)
84 ss
= OPENSSL_zalloc(sizeof(*ss
));
86 SSLerr(SSL_F_SSL_SESSION_NEW
, ERR_R_MALLOC_FAILURE
);
90 ss
->verify_result
= 1; /* avoid 0 (= X509_V_OK) just in case */
92 ss
->timeout
= 60 * 5 + 4; /* 5 minute timeout by default */
93 ss
->time
= (unsigned long)time(NULL
);
94 ss
->lock
= CRYPTO_THREAD_lock_new();
95 if (ss
->lock
== NULL
) {
96 SSLerr(SSL_F_SSL_SESSION_NEW
, ERR_R_MALLOC_FAILURE
);
101 if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_SESSION
, ss
, &ss
->ex_data
)) {
102 CRYPTO_THREAD_lock_free(ss
->lock
);
110 * Create a new SSL_SESSION and duplicate the contents of |src| into it. If
111 * ticket == 0 then no ticket information is duplicated, otherwise it is.
113 SSL_SESSION
*ssl_session_dup(SSL_SESSION
*src
, int ticket
)
117 dest
= OPENSSL_malloc(sizeof(*src
));
121 memcpy(dest
, src
, sizeof(*dest
));
124 * Set the various pointers to NULL so that we can call SSL_SESSION_free in
125 * the case of an error whilst halfway through constructing dest
127 #ifndef OPENSSL_NO_PSK
128 dest
->psk_identity_hint
= NULL
;
129 dest
->psk_identity
= NULL
;
131 dest
->ciphers
= NULL
;
132 dest
->tlsext_hostname
= NULL
;
133 #ifndef OPENSSL_NO_EC
134 dest
->tlsext_ecpointformatlist
= NULL
;
135 dest
->tlsext_ellipticcurvelist
= NULL
;
137 dest
->tlsext_tick
= NULL
;
138 #ifndef OPENSSL_NO_SRP
139 dest
->srp_username
= NULL
;
141 memset(&dest
->ex_data
, 0, sizeof(dest
->ex_data
));
143 /* We deliberately don't copy the prev and next pointers */
147 dest
->references
= 1;
149 dest
->lock
= CRYPTO_THREAD_lock_new();
150 if (dest
->lock
== NULL
)
153 if (src
->peer
!= NULL
)
154 X509_up_ref(src
->peer
);
156 if (src
->peer_chain
!= NULL
) {
157 dest
->peer_chain
= X509_chain_up_ref(src
->peer_chain
);
158 if (dest
->peer_chain
== NULL
)
162 #ifndef OPENSSL_NO_PSK
163 if (src
->psk_identity_hint
) {
164 dest
->psk_identity_hint
= OPENSSL_strdup(src
->psk_identity_hint
);
165 if (dest
->psk_identity_hint
== NULL
) {
169 if (src
->psk_identity
) {
170 dest
->psk_identity
= OPENSSL_strdup(src
->psk_identity
);
171 if (dest
->psk_identity
== NULL
) {
177 if(src
->ciphers
!= NULL
) {
178 dest
->ciphers
= sk_SSL_CIPHER_dup(src
->ciphers
);
179 if (dest
->ciphers
== NULL
)
183 if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_SSL_SESSION
,
184 &dest
->ex_data
, &src
->ex_data
)) {
188 if (src
->tlsext_hostname
) {
189 dest
->tlsext_hostname
= OPENSSL_strdup(src
->tlsext_hostname
);
190 if (dest
->tlsext_hostname
== NULL
) {
194 #ifndef OPENSSL_NO_EC
195 if (src
->tlsext_ecpointformatlist
) {
196 dest
->tlsext_ecpointformatlist
=
197 OPENSSL_memdup(src
->tlsext_ecpointformatlist
,
198 src
->tlsext_ecpointformatlist_length
);
199 if (dest
->tlsext_ecpointformatlist
== NULL
)
202 if (src
->tlsext_ellipticcurvelist
) {
203 dest
->tlsext_ellipticcurvelist
=
204 OPENSSL_memdup(src
->tlsext_ellipticcurvelist
,
205 src
->tlsext_ellipticcurvelist_length
);
206 if (dest
->tlsext_ellipticcurvelist
== NULL
)
212 dest
->tlsext_tick
= OPENSSL_memdup(src
->tlsext_tick
, src
->tlsext_ticklen
);
213 if(dest
->tlsext_tick
== NULL
)
216 dest
->tlsext_tick_lifetime_hint
= 0;
217 dest
->tlsext_ticklen
= 0;
220 #ifndef OPENSSL_NO_SRP
221 if (src
->srp_username
) {
222 dest
->srp_username
= OPENSSL_strdup(src
->srp_username
);
223 if (dest
->srp_username
== NULL
) {
231 SSLerr(SSL_F_SSL_SESSION_DUP
, ERR_R_MALLOC_FAILURE
);
232 SSL_SESSION_free(dest
);
236 const unsigned char *SSL_SESSION_get_id(const SSL_SESSION
*s
,
240 *len
= s
->session_id_length
;
241 return s
->session_id
;
244 unsigned int SSL_SESSION_get_compress_id(const SSL_SESSION
*s
)
246 return s
->compress_meth
;
250 * SSLv3/TLSv1 has 32 bytes (256 bits) of session ID space. As such, filling
251 * the ID with random junk repeatedly until we have no conflict is going to
252 * complete in one iteration pretty much "most" of the time (btw:
253 * understatement). So, if it takes us 10 iterations and we still can't avoid
254 * a conflict - well that's a reasonable point to call it quits. Either the
255 * RAND code is broken or someone is trying to open roughly very close to
256 * 2^256 SSL sessions to our server. How you might store that many sessions
257 * is perhaps a more interesting question ...
260 #define MAX_SESS_ID_ATTEMPTS 10
261 static int def_generate_session_id(const SSL
*ssl
, unsigned char *id
,
262 unsigned int *id_len
)
264 unsigned int retry
= 0;
266 if (RAND_bytes(id
, *id_len
) <= 0)
268 while (SSL_has_matching_session_id(ssl
, id
, *id_len
) &&
269 (++retry
< MAX_SESS_ID_ATTEMPTS
)) ;
270 if (retry
< MAX_SESS_ID_ATTEMPTS
)
272 /* else - woops a session_id match */
274 * XXX We should also check the external cache -- but the probability of
275 * a collision is negligible, and we could not prevent the concurrent
276 * creation of sessions with identical IDs since we currently don't have
277 * means to atomically check whether a session ID already exists and make
278 * a reservation for it if it does not (this problem applies to the
279 * internal cache as well).
284 int ssl_get_new_session(SSL
*s
, int session
)
286 /* This gets used by clients and servers. */
289 SSL_SESSION
*ss
= NULL
;
290 GEN_SESSION_CB cb
= def_generate_session_id
;
292 if ((ss
= SSL_SESSION_new()) == NULL
)
295 /* If the context has a default timeout, use it */
296 if (s
->session_ctx
->session_timeout
== 0)
297 ss
->timeout
= SSL_get_default_timeout(s
);
299 ss
->timeout
= s
->session_ctx
->session_timeout
;
301 SSL_SESSION_free(s
->session
);
305 if (s
->version
== SSL3_VERSION
) {
306 ss
->ssl_version
= SSL3_VERSION
;
307 ss
->session_id_length
= SSL3_SSL_SESSION_ID_LENGTH
;
308 } else if (s
->version
== TLS1_VERSION
) {
309 ss
->ssl_version
= TLS1_VERSION
;
310 ss
->session_id_length
= SSL3_SSL_SESSION_ID_LENGTH
;
311 } else if (s
->version
== TLS1_1_VERSION
) {
312 ss
->ssl_version
= TLS1_1_VERSION
;
313 ss
->session_id_length
= SSL3_SSL_SESSION_ID_LENGTH
;
314 } else if (s
->version
== TLS1_2_VERSION
) {
315 ss
->ssl_version
= TLS1_2_VERSION
;
316 ss
->session_id_length
= SSL3_SSL_SESSION_ID_LENGTH
;
317 } else if (s
->version
== DTLS1_BAD_VER
) {
318 ss
->ssl_version
= DTLS1_BAD_VER
;
319 ss
->session_id_length
= SSL3_SSL_SESSION_ID_LENGTH
;
320 } else if (s
->version
== DTLS1_VERSION
) {
321 ss
->ssl_version
= DTLS1_VERSION
;
322 ss
->session_id_length
= SSL3_SSL_SESSION_ID_LENGTH
;
323 } else if (s
->version
== DTLS1_2_VERSION
) {
324 ss
->ssl_version
= DTLS1_2_VERSION
;
325 ss
->session_id_length
= SSL3_SSL_SESSION_ID_LENGTH
;
327 SSLerr(SSL_F_SSL_GET_NEW_SESSION
, SSL_R_UNSUPPORTED_SSL_VERSION
);
328 SSL_SESSION_free(ss
);
333 * If RFC5077 ticket, use empty session ID (as server).
335 * (a) ssl_get_prev_session() does lookahead into the
336 * ClientHello extensions to find the session ticket.
337 * When ssl_get_prev_session() fails, statem_srvr.c calls
338 * ssl_get_new_session() in tls_process_client_hello().
339 * At that point, it has not yet parsed the extensions,
340 * however, because of the lookahead, it already knows
341 * whether a ticket is expected or not.
343 * (b) statem_clnt.c calls ssl_get_new_session() before parsing
344 * ServerHello extensions, and before recording the session
345 * ID received from the server, so this block is a noop.
347 if (s
->tlsext_ticket_expected
) {
348 ss
->session_id_length
= 0;
352 /* Choose which callback will set the session ID */
353 CRYPTO_THREAD_read_lock(s
->lock
);
354 CRYPTO_THREAD_read_lock(s
->session_ctx
->lock
);
355 if (s
->generate_session_id
)
356 cb
= s
->generate_session_id
;
357 else if (s
->session_ctx
->generate_session_id
)
358 cb
= s
->session_ctx
->generate_session_id
;
359 CRYPTO_THREAD_unlock(s
->session_ctx
->lock
);
360 CRYPTO_THREAD_unlock(s
->lock
);
361 /* Choose a session ID */
362 memset(ss
->session_id
, 0, ss
->session_id_length
);
363 tmp
= ss
->session_id_length
;
364 if (!cb(s
, ss
->session_id
, &tmp
)) {
365 /* The callback failed */
366 SSLerr(SSL_F_SSL_GET_NEW_SESSION
,
367 SSL_R_SSL_SESSION_ID_CALLBACK_FAILED
);
368 SSL_SESSION_free(ss
);
372 * Don't allow the callback to set the session length to zero. nor
373 * set it higher than it was.
375 if (tmp
== 0 || tmp
> ss
->session_id_length
) {
376 /* The callback set an illegal length */
377 SSLerr(SSL_F_SSL_GET_NEW_SESSION
,
378 SSL_R_SSL_SESSION_ID_HAS_BAD_LENGTH
);
379 SSL_SESSION_free(ss
);
382 ss
->session_id_length
= tmp
;
383 /* Finally, check for a conflict */
384 if (SSL_has_matching_session_id(s
, ss
->session_id
,
385 ss
->session_id_length
)) {
386 SSLerr(SSL_F_SSL_GET_NEW_SESSION
, SSL_R_SSL_SESSION_ID_CONFLICT
);
387 SSL_SESSION_free(ss
);
392 if (s
->tlsext_hostname
) {
393 ss
->tlsext_hostname
= OPENSSL_strdup(s
->tlsext_hostname
);
394 if (ss
->tlsext_hostname
== NULL
) {
395 SSLerr(SSL_F_SSL_GET_NEW_SESSION
, ERR_R_INTERNAL_ERROR
);
396 SSL_SESSION_free(ss
);
401 ss
->session_id_length
= 0;
404 if (s
->sid_ctx_length
> sizeof ss
->sid_ctx
) {
405 SSLerr(SSL_F_SSL_GET_NEW_SESSION
, ERR_R_INTERNAL_ERROR
);
406 SSL_SESSION_free(ss
);
409 memcpy(ss
->sid_ctx
, s
->sid_ctx
, s
->sid_ctx_length
);
410 ss
->sid_ctx_length
= s
->sid_ctx_length
;
412 ss
->ssl_version
= s
->version
;
413 ss
->verify_result
= X509_V_OK
;
415 /* If client supports extended master secret set it in session */
416 if (s
->s3
->flags
& TLS1_FLAGS_RECEIVED_EXTMS
)
417 ss
->flags
|= SSL_SESS_FLAG_EXTMS
;
423 * ssl_get_prev attempts to find an SSL_SESSION to be used to resume this
424 * connection. It is only called by servers.
426 * ext: ClientHello extensions (including length prefix)
427 * session_id: ClientHello session ID.
431 * 0: a session may have been found.
434 * - If a session is found then s->session is pointed at it (after freeing an
435 * existing session if need be) and s->verify_result is set from the session.
436 * - Both for new and resumed sessions, s->tlsext_ticket_expected is set to 1
437 * if the server should issue a new session ticket (to 0 otherwise).
439 int ssl_get_prev_session(SSL
*s
, const PACKET
*ext
, const PACKET
*session_id
)
441 /* This is used only by servers. */
443 SSL_SESSION
*ret
= NULL
;
445 int try_session_cache
= 1;
448 if (PACKET_remaining(session_id
) == 0)
449 try_session_cache
= 0;
451 /* sets s->tlsext_ticket_expected and extended master secret flag */
452 r
= tls_check_serverhello_tlsext_early(s
, ext
, session_id
, &ret
);
454 case -1: /* Error during processing */
457 case 0: /* No ticket found */
458 case 1: /* Zero length ticket found */
459 break; /* Ok to carry on processing session id. */
460 case 2: /* Ticket found but not decrypted. */
461 case 3: /* Ticket decrypted, *ret has been set. */
462 try_session_cache
= 0;
468 if (try_session_cache
&&
470 !(s
->session_ctx
->session_cache_mode
&
471 SSL_SESS_CACHE_NO_INTERNAL_LOOKUP
)) {
474 data
.ssl_version
= s
->version
;
475 memset(data
.session_id
, 0, sizeof(data
.session_id
));
476 if (!PACKET_copy_all(session_id
, data
.session_id
,
477 sizeof(data
.session_id
),
481 data
.session_id_length
= local_len
;
482 CRYPTO_THREAD_read_lock(s
->session_ctx
->lock
);
483 ret
= lh_SSL_SESSION_retrieve(s
->session_ctx
->sessions
, &data
);
485 /* don't allow other threads to steal it: */
486 SSL_SESSION_up_ref(ret
);
488 CRYPTO_THREAD_unlock(s
->session_ctx
->lock
);
490 s
->session_ctx
->stats
.sess_miss
++;
493 if (try_session_cache
&&
494 ret
== NULL
&& s
->session_ctx
->get_session_cb
!= NULL
) {
496 ret
= s
->session_ctx
->get_session_cb(s
, PACKET_data(session_id
),
497 PACKET_remaining(session_id
),
501 s
->session_ctx
->stats
.sess_cb_hit
++;
504 * Increment reference count now if the session callback asks us
505 * to do so (note that if the session structures returned by the
506 * callback are shared between threads, it must handle the
507 * reference count itself [i.e. copy == 0], or things won't be
511 SSL_SESSION_up_ref(ret
);
514 * Add the externally cached session to the internal cache as
515 * well if and only if we are supposed to.
518 (s
->session_ctx
->session_cache_mode
&
519 SSL_SESS_CACHE_NO_INTERNAL_STORE
)) {
521 * The following should not return 1, otherwise, things are
524 if (SSL_CTX_add_session(s
->session_ctx
, ret
))
533 /* Now ret is non-NULL and we own one of its reference counts. */
535 if (ret
->sid_ctx_length
!= s
->sid_ctx_length
536 || memcmp(ret
->sid_ctx
, s
->sid_ctx
, ret
->sid_ctx_length
)) {
538 * We have the session requested by the client, but we don't want to
539 * use it in this context.
541 goto err
; /* treat like cache miss */
544 if ((s
->verify_mode
& SSL_VERIFY_PEER
) && s
->sid_ctx_length
== 0) {
546 * We can't be sure if this session is being used out of context,
547 * which is especially important for SSL_VERIFY_PEER. The application
548 * should have used SSL[_CTX]_set_session_id_context. For this error
549 * case, we generate an error instead of treating the event like a
550 * cache miss (otherwise it would be easy for applications to
551 * effectively disable the session cache by accident without anyone
555 SSLerr(SSL_F_SSL_GET_PREV_SESSION
,
556 SSL_R_SESSION_ID_CONTEXT_UNINITIALIZED
);
561 if (ret
->cipher
== NULL
) {
562 unsigned char buf
[5], *p
;
568 if ((ret
->ssl_version
>> 8) >= SSL3_VERSION_MAJOR
)
569 ret
->cipher
= ssl_get_cipher_by_char(s
, &(buf
[2]));
571 ret
->cipher
= ssl_get_cipher_by_char(s
, &(buf
[1]));
572 if (ret
->cipher
== NULL
)
576 if (ret
->timeout
< (long)(time(NULL
) - ret
->time
)) { /* timeout */
577 s
->session_ctx
->stats
.sess_timeout
++;
578 if (try_session_cache
) {
579 /* session was from the cache, so remove it */
580 SSL_CTX_remove_session(s
->session_ctx
, ret
);
585 /* Check extended master secret extension consistency */
586 if (ret
->flags
& SSL_SESS_FLAG_EXTMS
) {
587 /* If old session includes extms, but new does not: abort handshake */
588 if (!(s
->s3
->flags
& TLS1_FLAGS_RECEIVED_EXTMS
)) {
589 SSLerr(SSL_F_SSL_GET_PREV_SESSION
, SSL_R_INCONSISTENT_EXTMS
);
590 ssl3_send_alert(s
, SSL3_AL_FATAL
, SSL_AD_HANDSHAKE_FAILURE
);
594 } else if (s
->s3
->flags
& TLS1_FLAGS_RECEIVED_EXTMS
) {
595 /* If new session includes extms, but old does not: do not resume */
599 s
->session_ctx
->stats
.sess_hit
++;
601 SSL_SESSION_free(s
->session
);
603 s
->verify_result
= s
->session
->verify_result
;
608 SSL_SESSION_free(ret
);
610 if (!try_session_cache
) {
612 * The session was from a ticket, so we should issue a ticket for
615 s
->tlsext_ticket_expected
= 1;
624 int SSL_CTX_add_session(SSL_CTX
*ctx
, SSL_SESSION
*c
)
630 * add just 1 reference count for the SSL_CTX's session cache even though
631 * it has two ways of access: each session is in a doubly linked list and
634 SSL_SESSION_up_ref(c
);
636 * if session c is in already in cache, we take back the increment later
639 CRYPTO_THREAD_write_lock(ctx
->lock
);
640 s
= lh_SSL_SESSION_insert(ctx
->sessions
, c
);
643 * s != NULL iff we already had a session with the given PID. In this
644 * case, s == c should hold (then we did not really modify
645 * ctx->sessions), or we're in trouble.
647 if (s
!= NULL
&& s
!= c
) {
648 /* We *are* in trouble ... */
649 SSL_SESSION_list_remove(ctx
, s
);
652 * ... so pretend the other session did not exist in cache (we cannot
653 * handle two SSL_SESSION structures with identical session ID in the
654 * same cache, which could happen e.g. when two threads concurrently
655 * obtain the same session from an external cache)
660 /* Put at the head of the queue unless it is already in the cache */
662 SSL_SESSION_list_add(ctx
, c
);
666 * existing cache entry -- decrement previously incremented reference
667 * count because it already takes into account the cache
670 SSL_SESSION_free(s
); /* s == c */
674 * new cache entry -- remove old ones if cache has become too large
679 if (SSL_CTX_sess_get_cache_size(ctx
) > 0) {
680 while (SSL_CTX_sess_number(ctx
) >
681 SSL_CTX_sess_get_cache_size(ctx
)) {
682 if (!remove_session_lock(ctx
, ctx
->session_cache_tail
, 0))
685 ctx
->stats
.sess_cache_full
++;
689 CRYPTO_THREAD_unlock(ctx
->lock
);
693 int SSL_CTX_remove_session(SSL_CTX
*ctx
, SSL_SESSION
*c
)
695 return remove_session_lock(ctx
, c
, 1);
698 static int remove_session_lock(SSL_CTX
*ctx
, SSL_SESSION
*c
, int lck
)
703 if ((c
!= NULL
) && (c
->session_id_length
!= 0)) {
705 CRYPTO_THREAD_write_lock(ctx
->lock
);
706 if ((r
= lh_SSL_SESSION_retrieve(ctx
->sessions
, c
)) == c
) {
708 r
= lh_SSL_SESSION_delete(ctx
->sessions
, c
);
709 SSL_SESSION_list_remove(ctx
, c
);
711 c
->not_resumable
= 1;
714 CRYPTO_THREAD_unlock(ctx
->lock
);
719 if (ctx
->remove_session_cb
!= NULL
)
720 ctx
->remove_session_cb(ctx
, c
);
726 void SSL_SESSION_free(SSL_SESSION
*ss
)
733 CRYPTO_atomic_add(&ss
->references
, -1, &i
, ss
->lock
);
734 REF_PRINT_COUNT("SSL_SESSION", ss
);
737 REF_ASSERT_ISNT(i
< 0);
739 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_SESSION
, ss
, &ss
->ex_data
);
741 OPENSSL_cleanse(ss
->master_key
, sizeof ss
->master_key
);
742 OPENSSL_cleanse(ss
->session_id
, sizeof ss
->session_id
);
744 sk_X509_pop_free(ss
->peer_chain
, X509_free
);
745 sk_SSL_CIPHER_free(ss
->ciphers
);
746 OPENSSL_free(ss
->tlsext_hostname
);
747 OPENSSL_free(ss
->tlsext_tick
);
748 #ifndef OPENSSL_NO_EC
749 ss
->tlsext_ecpointformatlist_length
= 0;
750 OPENSSL_free(ss
->tlsext_ecpointformatlist
);
751 ss
->tlsext_ellipticcurvelist_length
= 0;
752 OPENSSL_free(ss
->tlsext_ellipticcurvelist
);
753 #endif /* OPENSSL_NO_EC */
754 #ifndef OPENSSL_NO_PSK
755 OPENSSL_free(ss
->psk_identity_hint
);
756 OPENSSL_free(ss
->psk_identity
);
758 #ifndef OPENSSL_NO_SRP
759 OPENSSL_free(ss
->srp_username
);
761 CRYPTO_THREAD_lock_free(ss
->lock
);
762 OPENSSL_clear_free(ss
, sizeof(*ss
));
765 int SSL_SESSION_up_ref(SSL_SESSION
*ss
)
769 if (CRYPTO_atomic_add(&ss
->references
, 1, &i
, ss
->lock
) <= 0)
772 REF_PRINT_COUNT("SSL_SESSION", ss
);
773 REF_ASSERT_ISNT(i
< 2);
774 return ((i
> 1) ? 1 : 0);
777 int SSL_set_session(SSL
*s
, SSL_SESSION
*session
)
779 ssl_clear_bad_session(s
);
780 if (s
->ctx
->method
!= s
->method
) {
781 if (!SSL_set_ssl_method(s
, s
->ctx
->method
))
785 if (session
!= NULL
) {
786 SSL_SESSION_up_ref(session
);
787 s
->verify_result
= session
->verify_result
;
789 SSL_SESSION_free(s
->session
);
790 s
->session
= session
;
795 long SSL_SESSION_set_timeout(SSL_SESSION
*s
, long t
)
803 long SSL_SESSION_get_timeout(const SSL_SESSION
*s
)
810 long SSL_SESSION_get_time(const SSL_SESSION
*s
)
817 long SSL_SESSION_set_time(SSL_SESSION
*s
, long t
)
825 int SSL_SESSION_get_protocol_version(const SSL_SESSION
*s
)
827 return s
->ssl_version
;
830 const char *SSL_SESSION_get0_hostname(const SSL_SESSION
*s
)
832 return s
->tlsext_hostname
;
835 int SSL_SESSION_has_ticket(const SSL_SESSION
*s
)
837 return (s
->tlsext_ticklen
> 0) ? 1 : 0;
840 unsigned long SSL_SESSION_get_ticket_lifetime_hint(const SSL_SESSION
*s
)
842 return s
->tlsext_tick_lifetime_hint
;
845 void SSL_SESSION_get0_ticket(const SSL_SESSION
*s
, unsigned char **tick
,
848 *len
= s
->tlsext_ticklen
;
850 *tick
= s
->tlsext_tick
;
853 X509
*SSL_SESSION_get0_peer(SSL_SESSION
*s
)
858 int SSL_SESSION_set1_id_context(SSL_SESSION
*s
, const unsigned char *sid_ctx
,
859 unsigned int sid_ctx_len
)
861 if (sid_ctx_len
> SSL_MAX_SID_CTX_LENGTH
) {
862 SSLerr(SSL_F_SSL_SESSION_SET1_ID_CONTEXT
,
863 SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG
);
866 s
->sid_ctx_length
= sid_ctx_len
;
867 memcpy(s
->sid_ctx
, sid_ctx
, sid_ctx_len
);
872 long SSL_CTX_set_timeout(SSL_CTX
*s
, long t
)
877 l
= s
->session_timeout
;
878 s
->session_timeout
= t
;
882 long SSL_CTX_get_timeout(const SSL_CTX
*s
)
886 return (s
->session_timeout
);
889 int SSL_set_session_secret_cb(SSL
*s
,
890 int (*tls_session_secret_cb
) (SSL
*s
,
902 s
->tls_session_secret_cb
= tls_session_secret_cb
;
903 s
->tls_session_secret_cb_arg
= arg
;
907 int SSL_set_session_ticket_ext_cb(SSL
*s
, tls_session_ticket_ext_cb_fn cb
,
912 s
->tls_session_ticket_ext_cb
= cb
;
913 s
->tls_session_ticket_ext_cb_arg
= arg
;
917 int SSL_set_session_ticket_ext(SSL
*s
, void *ext_data
, int ext_len
)
919 if (s
->version
>= TLS1_VERSION
) {
920 OPENSSL_free(s
->tlsext_session_ticket
);
921 s
->tlsext_session_ticket
= NULL
;
922 s
->tlsext_session_ticket
=
923 OPENSSL_malloc(sizeof(TLS_SESSION_TICKET_EXT
) + ext_len
);
924 if (s
->tlsext_session_ticket
== NULL
) {
925 SSLerr(SSL_F_SSL_SET_SESSION_TICKET_EXT
, ERR_R_MALLOC_FAILURE
);
930 s
->tlsext_session_ticket
->length
= ext_len
;
931 s
->tlsext_session_ticket
->data
= s
->tlsext_session_ticket
+ 1;
932 memcpy(s
->tlsext_session_ticket
->data
, ext_data
, ext_len
);
934 s
->tlsext_session_ticket
->length
= 0;
935 s
->tlsext_session_ticket
->data
= NULL
;
944 typedef struct timeout_param_st
{
947 LHASH_OF(SSL_SESSION
) *cache
;
950 static void timeout_cb(SSL_SESSION
*s
, TIMEOUT_PARAM
*p
)
952 if ((p
->time
== 0) || (p
->time
> (s
->time
+ s
->timeout
))) { /* timeout */
954 * The reason we don't call SSL_CTX_remove_session() is to save on
957 (void)lh_SSL_SESSION_delete(p
->cache
, s
);
958 SSL_SESSION_list_remove(p
->ctx
, s
);
959 s
->not_resumable
= 1;
960 if (p
->ctx
->remove_session_cb
!= NULL
)
961 p
->ctx
->remove_session_cb(p
->ctx
, s
);
966 IMPLEMENT_LHASH_DOALL_ARG(SSL_SESSION
, TIMEOUT_PARAM
);
968 void SSL_CTX_flush_sessions(SSL_CTX
*s
, long t
)
974 tp
.cache
= s
->sessions
;
975 if (tp
.cache
== NULL
)
978 CRYPTO_THREAD_write_lock(s
->lock
);
979 i
= lh_SSL_SESSION_get_down_load(s
->sessions
);
980 lh_SSL_SESSION_set_down_load(s
->sessions
, 0);
981 lh_SSL_SESSION_doall_TIMEOUT_PARAM(tp
.cache
, timeout_cb
, &tp
);
982 lh_SSL_SESSION_set_down_load(s
->sessions
, i
);
983 CRYPTO_THREAD_unlock(s
->lock
);
986 int ssl_clear_bad_session(SSL
*s
)
988 if ((s
->session
!= NULL
) &&
989 !(s
->shutdown
& SSL_SENT_SHUTDOWN
) &&
990 !(SSL_in_init(s
) || SSL_in_before(s
))) {
991 SSL_CTX_remove_session(s
->session_ctx
, s
->session
);
997 /* locked by SSL_CTX in the calling function */
998 static void SSL_SESSION_list_remove(SSL_CTX
*ctx
, SSL_SESSION
*s
)
1000 if ((s
->next
== NULL
) || (s
->prev
== NULL
))
1003 if (s
->next
== (SSL_SESSION
*)&(ctx
->session_cache_tail
)) {
1004 /* last element in list */
1005 if (s
->prev
== (SSL_SESSION
*)&(ctx
->session_cache_head
)) {
1006 /* only one element in list */
1007 ctx
->session_cache_head
= NULL
;
1008 ctx
->session_cache_tail
= NULL
;
1010 ctx
->session_cache_tail
= s
->prev
;
1011 s
->prev
->next
= (SSL_SESSION
*)&(ctx
->session_cache_tail
);
1014 if (s
->prev
== (SSL_SESSION
*)&(ctx
->session_cache_head
)) {
1015 /* first element in list */
1016 ctx
->session_cache_head
= s
->next
;
1017 s
->next
->prev
= (SSL_SESSION
*)&(ctx
->session_cache_head
);
1019 /* middle of list */
1020 s
->next
->prev
= s
->prev
;
1021 s
->prev
->next
= s
->next
;
1024 s
->prev
= s
->next
= NULL
;
1027 static void SSL_SESSION_list_add(SSL_CTX
*ctx
, SSL_SESSION
*s
)
1029 if ((s
->next
!= NULL
) && (s
->prev
!= NULL
))
1030 SSL_SESSION_list_remove(ctx
, s
);
1032 if (ctx
->session_cache_head
== NULL
) {
1033 ctx
->session_cache_head
= s
;
1034 ctx
->session_cache_tail
= s
;
1035 s
->prev
= (SSL_SESSION
*)&(ctx
->session_cache_head
);
1036 s
->next
= (SSL_SESSION
*)&(ctx
->session_cache_tail
);
1038 s
->next
= ctx
->session_cache_head
;
1040 s
->prev
= (SSL_SESSION
*)&(ctx
->session_cache_head
);
1041 ctx
->session_cache_head
= s
;
1045 void SSL_CTX_sess_set_new_cb(SSL_CTX
*ctx
,
1046 int (*cb
) (struct ssl_st
*ssl
,
1049 ctx
->new_session_cb
= cb
;
1052 int (*SSL_CTX_sess_get_new_cb(SSL_CTX
*ctx
)) (SSL
*ssl
, SSL_SESSION
*sess
) {
1053 return ctx
->new_session_cb
;
1056 void SSL_CTX_sess_set_remove_cb(SSL_CTX
*ctx
,
1057 void (*cb
) (SSL_CTX
*ctx
, SSL_SESSION
*sess
))
1059 ctx
->remove_session_cb
= cb
;
1062 void (*SSL_CTX_sess_get_remove_cb(SSL_CTX
*ctx
)) (SSL_CTX
*ctx
,
1063 SSL_SESSION
*sess
) {
1064 return ctx
->remove_session_cb
;
1067 void SSL_CTX_sess_set_get_cb(SSL_CTX
*ctx
,
1068 SSL_SESSION
*(*cb
) (struct ssl_st
*ssl
,
1069 const unsigned char *data
,
1070 int len
, int *copy
))
1072 ctx
->get_session_cb
= cb
;
1075 SSL_SESSION
*(*SSL_CTX_sess_get_get_cb(SSL_CTX
*ctx
)) (SSL
*ssl
,
1076 const unsigned char *data
,
1077 int len
, int *copy
) {
1078 return ctx
->get_session_cb
;
1081 void SSL_CTX_set_info_callback(SSL_CTX
*ctx
,
1082 void (*cb
) (const SSL
*ssl
, int type
, int val
))
1084 ctx
->info_callback
= cb
;
1087 void (*SSL_CTX_get_info_callback(SSL_CTX
*ctx
)) (const SSL
*ssl
, int type
,
1089 return ctx
->info_callback
;
1092 void SSL_CTX_set_client_cert_cb(SSL_CTX
*ctx
,
1093 int (*cb
) (SSL
*ssl
, X509
**x509
,
1096 ctx
->client_cert_cb
= cb
;
1099 int (*SSL_CTX_get_client_cert_cb(SSL_CTX
*ctx
)) (SSL
*ssl
, X509
**x509
,
1101 return ctx
->client_cert_cb
;
1104 #ifndef OPENSSL_NO_ENGINE
1105 int SSL_CTX_set_client_cert_engine(SSL_CTX
*ctx
, ENGINE
*e
)
1107 if (!ENGINE_init(e
)) {
1108 SSLerr(SSL_F_SSL_CTX_SET_CLIENT_CERT_ENGINE
, ERR_R_ENGINE_LIB
);
1111 if (!ENGINE_get_ssl_client_cert_function(e
)) {
1112 SSLerr(SSL_F_SSL_CTX_SET_CLIENT_CERT_ENGINE
,
1113 SSL_R_NO_CLIENT_CERT_METHOD
);
1117 ctx
->client_cert_engine
= e
;
1122 void SSL_CTX_set_cookie_generate_cb(SSL_CTX
*ctx
,
1123 int (*cb
) (SSL
*ssl
,
1124 unsigned char *cookie
,
1125 unsigned int *cookie_len
))
1127 ctx
->app_gen_cookie_cb
= cb
;
1130 void SSL_CTX_set_cookie_verify_cb(SSL_CTX
*ctx
,
1131 int (*cb
) (SSL
*ssl
, const unsigned char *cookie
,
1132 unsigned int cookie_len
))
1134 ctx
->app_verify_cookie_cb
= cb
;
1137 IMPLEMENT_PEM_rw(SSL_SESSION
, SSL_SESSION
, PEM_STRING_SSL_SESSION
,