2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to. The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
26 * 1. Redistributions of source code must retain the copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 * must display the following acknowledgement:
33 * "This product includes cryptographic software written by
34 * Eric Young (eay@cryptsoft.com)"
35 * The word 'cryptographic' can be left out if the rouines from the library
36 * being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
58 /* ====================================================================
59 * Copyright (c) 1998-2006 The OpenSSL Project. All rights reserved.
61 * Redistribution and use in source and binary forms, with or without
62 * modification, are permitted provided that the following conditions
65 * 1. Redistributions of source code must retain the above copyright
66 * notice, this list of conditions and the following disclaimer.
68 * 2. Redistributions in binary form must reproduce the above copyright
69 * notice, this list of conditions and the following disclaimer in
70 * the documentation and/or other materials provided with the
73 * 3. All advertising materials mentioning features or use of this
74 * software must display the following acknowledgment:
75 * "This product includes software developed by the OpenSSL Project
76 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
78 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
79 * endorse or promote products derived from this software without
80 * prior written permission. For written permission, please contact
81 * openssl-core@openssl.org.
83 * 5. Products derived from this software may not be called "OpenSSL"
84 * nor may "OpenSSL" appear in their names without prior written
85 * permission of the OpenSSL Project.
87 * 6. Redistributions of any form whatsoever must retain the following
89 * "This product includes software developed by the OpenSSL Project
90 * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
92 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
93 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
94 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
95 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
96 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
97 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
98 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
99 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
100 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
101 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
102 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
103 * OF THE POSSIBILITY OF SUCH DAMAGE.
104 * ====================================================================
106 * This product includes cryptographic software written by Eric Young
107 * (eay@cryptsoft.com). This product includes software written by Tim
108 * Hudson (tjh@cryptsoft.com).
111 /* ====================================================================
112 * Copyright 2005 Nokia. All rights reserved.
114 * The portions of the attached software ("Contribution") is developed by
115 * Nokia Corporation and is licensed pursuant to the OpenSSL open source
118 * The Contribution, originally written by Mika Kousa and Pasi Eronen of
119 * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
120 * support (see RFC 4279) to OpenSSL.
122 * No patent licenses or other rights except those expressly stated in
123 * the OpenSSL open source license shall be deemed granted or received
124 * expressly, by implication, estoppel, or otherwise.
126 * No assurances are provided by Nokia that the Contribution does not
127 * infringe the patent or other intellectual property rights of any third
128 * party or that the license provides you with all the necessary rights
129 * to make use of the Contribution.
131 * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
132 * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
133 * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
134 * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
139 #include <openssl/lhash.h>
140 #include <openssl/rand.h>
141 #ifndef OPENSSL_NO_ENGINE
142 # include <openssl/engine.h>
144 #include "ssl_locl.h"
146 static void SSL_SESSION_list_remove(SSL_CTX
*ctx
, SSL_SESSION
*s
);
147 static void SSL_SESSION_list_add(SSL_CTX
*ctx
, SSL_SESSION
*s
);
148 static int remove_session_lock(SSL_CTX
*ctx
, SSL_SESSION
*c
, int lck
);
150 SSL_SESSION
*SSL_get_session(const SSL
*ssl
)
151 /* aka SSL_get0_session; gets 0 objects, just returns a copy of the pointer */
153 return (ssl
->session
);
156 SSL_SESSION
*SSL_get1_session(SSL
*ssl
)
157 /* variant of SSL_get_session: caller really gets something */
161 * Need to lock this all up rather than just use CRYPTO_add so that
162 * somebody doesn't free ssl->session between when we check it's non-null
163 * and when we up the reference count.
165 CRYPTO_w_lock(CRYPTO_LOCK_SSL_SESSION
);
169 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_SESSION
);
173 int SSL_SESSION_get_ex_new_index(long argl
, void *argp
,
174 CRYPTO_EX_new
*new_func
,
175 CRYPTO_EX_dup
*dup_func
,
176 CRYPTO_EX_free
*free_func
)
178 return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL_SESSION
, argl
, argp
,
179 new_func
, dup_func
, free_func
);
182 int SSL_SESSION_set_ex_data(SSL_SESSION
*s
, int idx
, void *arg
)
184 return (CRYPTO_set_ex_data(&s
->ex_data
, idx
, arg
));
187 void *SSL_SESSION_get_ex_data(const SSL_SESSION
*s
, int idx
)
189 return (CRYPTO_get_ex_data(&s
->ex_data
, idx
));
192 SSL_SESSION
*SSL_SESSION_new(void)
196 ss
= OPENSSL_malloc(sizeof(*ss
));
198 SSLerr(SSL_F_SSL_SESSION_NEW
, ERR_R_MALLOC_FAILURE
);
201 memset(ss
, 0, sizeof(*ss
));
203 ss
->verify_result
= 1; /* avoid 0 (= X509_V_OK) just in case */
205 ss
->timeout
= 60 * 5 + 4; /* 5 minute timeout by default */
206 ss
->time
= (unsigned long)time(NULL
);
209 ss
->compress_meth
= 0;
210 ss
->tlsext_hostname
= NULL
;
211 #ifndef OPENSSL_NO_EC
212 ss
->tlsext_ecpointformatlist_length
= 0;
213 ss
->tlsext_ecpointformatlist
= NULL
;
214 ss
->tlsext_ellipticcurvelist_length
= 0;
215 ss
->tlsext_ellipticcurvelist
= NULL
;
217 CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_SESSION
, ss
, &ss
->ex_data
);
218 #ifndef OPENSSL_NO_PSK
219 ss
->psk_identity_hint
= NULL
;
220 ss
->psk_identity
= NULL
;
222 #ifndef OPENSSL_NO_SRP
223 ss
->srp_username
= NULL
;
228 const unsigned char *SSL_SESSION_get_id(const SSL_SESSION
*s
,
232 *len
= s
->session_id_length
;
233 return s
->session_id
;
236 unsigned int SSL_SESSION_get_compress_id(const SSL_SESSION
*s
)
238 return s
->compress_meth
;
242 * SSLv3/TLSv1 has 32 bytes (256 bits) of session ID space. As such, filling
243 * the ID with random junk repeatedly until we have no conflict is going to
244 * complete in one iteration pretty much "most" of the time (btw:
245 * understatement). So, if it takes us 10 iterations and we still can't avoid
246 * a conflict - well that's a reasonable point to call it quits. Either the
247 * RAND code is broken or someone is trying to open roughly very close to
248 * 2^256 SSL sessions to our server. How you might store that many sessions
249 * is perhaps a more interesting question ...
252 #define MAX_SESS_ID_ATTEMPTS 10
253 static int def_generate_session_id(const SSL
*ssl
, unsigned char *id
,
254 unsigned int *id_len
)
256 unsigned int retry
= 0;
258 if (RAND_bytes(id
, *id_len
) <= 0)
260 while (SSL_has_matching_session_id(ssl
, id
, *id_len
) &&
261 (++retry
< MAX_SESS_ID_ATTEMPTS
)) ;
262 if (retry
< MAX_SESS_ID_ATTEMPTS
)
264 /* else - woops a session_id match */
266 * XXX We should also check the external cache -- but the probability of
267 * a collision is negligible, and we could not prevent the concurrent
268 * creation of sessions with identical IDs since we currently don't have
269 * means to atomically check whether a session ID already exists and make
270 * a reservation for it if it does not (this problem applies to the
271 * internal cache as well).
276 int ssl_get_new_session(SSL
*s
, int session
)
278 /* This gets used by clients and servers. */
281 SSL_SESSION
*ss
= NULL
;
282 GEN_SESSION_CB cb
= def_generate_session_id
;
284 if ((ss
= SSL_SESSION_new()) == NULL
)
287 /* If the context has a default timeout, use it */
288 if (s
->session_ctx
->session_timeout
== 0)
289 ss
->timeout
= SSL_get_default_timeout(s
);
291 ss
->timeout
= s
->session_ctx
->session_timeout
;
293 SSL_SESSION_free(s
->session
);
297 if (s
->version
== SSL3_VERSION
) {
298 ss
->ssl_version
= SSL3_VERSION
;
299 ss
->session_id_length
= SSL3_SSL_SESSION_ID_LENGTH
;
300 } else if (s
->version
== TLS1_VERSION
) {
301 ss
->ssl_version
= TLS1_VERSION
;
302 ss
->session_id_length
= SSL3_SSL_SESSION_ID_LENGTH
;
303 } else if (s
->version
== TLS1_1_VERSION
) {
304 ss
->ssl_version
= TLS1_1_VERSION
;
305 ss
->session_id_length
= SSL3_SSL_SESSION_ID_LENGTH
;
306 } else if (s
->version
== TLS1_2_VERSION
) {
307 ss
->ssl_version
= TLS1_2_VERSION
;
308 ss
->session_id_length
= SSL3_SSL_SESSION_ID_LENGTH
;
309 } else if (s
->version
== DTLS1_BAD_VER
) {
310 ss
->ssl_version
= DTLS1_BAD_VER
;
311 ss
->session_id_length
= SSL3_SSL_SESSION_ID_LENGTH
;
312 } else if (s
->version
== DTLS1_VERSION
) {
313 ss
->ssl_version
= DTLS1_VERSION
;
314 ss
->session_id_length
= SSL3_SSL_SESSION_ID_LENGTH
;
315 } else if (s
->version
== DTLS1_2_VERSION
) {
316 ss
->ssl_version
= DTLS1_2_VERSION
;
317 ss
->session_id_length
= SSL3_SSL_SESSION_ID_LENGTH
;
319 SSLerr(SSL_F_SSL_GET_NEW_SESSION
, SSL_R_UNSUPPORTED_SSL_VERSION
);
320 SSL_SESSION_free(ss
);
325 * If RFC5077 ticket, use empty session ID (as server).
327 * (a) ssl_get_prev_session() does lookahead into the
328 * ClientHello extensions to find the session ticket.
329 * When ssl_get_prev_session() fails, s3_srvr.c calls
330 * ssl_get_new_session() in ssl3_get_client_hello().
331 * At that point, it has not yet parsed the extensions,
332 * however, because of the lookahead, it already knows
333 * whether a ticket is expected or not.
335 * (b) s3_clnt.c calls ssl_get_new_session() before parsing
336 * ServerHello extensions, and before recording the session
337 * ID received from the server, so this block is a noop.
339 if (s
->tlsext_ticket_expected
) {
340 ss
->session_id_length
= 0;
344 /* Choose which callback will set the session ID */
345 CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX
);
346 if (s
->generate_session_id
)
347 cb
= s
->generate_session_id
;
348 else if (s
->session_ctx
->generate_session_id
)
349 cb
= s
->session_ctx
->generate_session_id
;
350 CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX
);
351 /* Choose a session ID */
352 tmp
= ss
->session_id_length
;
353 if (!cb(s
, ss
->session_id
, &tmp
)) {
354 /* The callback failed */
355 SSLerr(SSL_F_SSL_GET_NEW_SESSION
,
356 SSL_R_SSL_SESSION_ID_CALLBACK_FAILED
);
357 SSL_SESSION_free(ss
);
361 * Don't allow the callback to set the session length to zero. nor
362 * set it higher than it was.
364 if (!tmp
|| (tmp
> ss
->session_id_length
)) {
365 /* The callback set an illegal length */
366 SSLerr(SSL_F_SSL_GET_NEW_SESSION
,
367 SSL_R_SSL_SESSION_ID_HAS_BAD_LENGTH
);
368 SSL_SESSION_free(ss
);
371 ss
->session_id_length
= tmp
;
372 /* Finally, check for a conflict */
373 if (SSL_has_matching_session_id(s
, ss
->session_id
,
374 ss
->session_id_length
)) {
375 SSLerr(SSL_F_SSL_GET_NEW_SESSION
, SSL_R_SSL_SESSION_ID_CONFLICT
);
376 SSL_SESSION_free(ss
);
381 if (s
->tlsext_hostname
) {
382 ss
->tlsext_hostname
= BUF_strdup(s
->tlsext_hostname
);
383 if (ss
->tlsext_hostname
== NULL
) {
384 SSLerr(SSL_F_SSL_GET_NEW_SESSION
, ERR_R_INTERNAL_ERROR
);
385 SSL_SESSION_free(ss
);
390 ss
->session_id_length
= 0;
393 if (s
->sid_ctx_length
> sizeof ss
->sid_ctx
) {
394 SSLerr(SSL_F_SSL_GET_NEW_SESSION
, ERR_R_INTERNAL_ERROR
);
395 SSL_SESSION_free(ss
);
398 memcpy(ss
->sid_ctx
, s
->sid_ctx
, s
->sid_ctx_length
);
399 ss
->sid_ctx_length
= s
->sid_ctx_length
;
401 ss
->ssl_version
= s
->version
;
402 ss
->verify_result
= X509_V_OK
;
408 * ssl_get_prev attempts to find an SSL_SESSION to be used to resume this
409 * connection. It is only called by servers.
411 * session_id: points at the session ID in the ClientHello. This code will
412 * read past the end of this in order to parse out the session ticket
414 * len: the length of the session ID.
415 * limit: a pointer to the first byte after the ClientHello.
419 * 0: a session may have been found.
422 * - If a session is found then s->session is pointed at it (after freeing an
423 * existing session if need be) and s->verify_result is set from the session.
424 * - Both for new and resumed sessions, s->tlsext_ticket_expected is set to 1
425 * if the server should issue a new session ticket (to 0 otherwise).
427 int ssl_get_prev_session(SSL
*s
, unsigned char *session_id
, int len
,
428 const unsigned char *limit
)
430 /* This is used only by servers. */
432 SSL_SESSION
*ret
= NULL
;
434 int try_session_cache
= 1;
437 if (len
< 0 || len
> SSL_MAX_SSL_SESSION_ID_LENGTH
)
440 if (session_id
+ len
> limit
) {
446 try_session_cache
= 0;
448 /* sets s->tlsext_ticket_expected */
449 r
= tls1_process_ticket(s
, session_id
, len
, limit
, &ret
);
451 case -1: /* Error during processing */
454 case 0: /* No ticket found */
455 case 1: /* Zero length ticket found */
456 break; /* Ok to carry on processing session id. */
457 case 2: /* Ticket found but not decrypted. */
458 case 3: /* Ticket decrypted, *ret has been set. */
459 try_session_cache
= 0;
465 if (try_session_cache
&&
467 !(s
->session_ctx
->session_cache_mode
&
468 SSL_SESS_CACHE_NO_INTERNAL_LOOKUP
)) {
470 data
.ssl_version
= s
->version
;
471 data
.session_id_length
= len
;
474 memcpy(data
.session_id
, session_id
, len
);
475 CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX
);
476 ret
= lh_SSL_SESSION_retrieve(s
->session_ctx
->sessions
, &data
);
478 /* don't allow other threads to steal it: */
479 CRYPTO_add(&ret
->references
, 1, CRYPTO_LOCK_SSL_SESSION
);
481 CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX
);
483 s
->session_ctx
->stats
.sess_miss
++;
486 if (try_session_cache
&&
487 ret
== NULL
&& s
->session_ctx
->get_session_cb
!= NULL
) {
490 if ((ret
= s
->session_ctx
->get_session_cb(s
, session_id
, len
, ©
))) {
491 s
->session_ctx
->stats
.sess_cb_hit
++;
494 * Increment reference count now if the session callback asks us
495 * to do so (note that if the session structures returned by the
496 * callback are shared between threads, it must handle the
497 * reference count itself [i.e. copy == 0], or things won't be
501 CRYPTO_add(&ret
->references
, 1, CRYPTO_LOCK_SSL_SESSION
);
504 * Add the externally cached session to the internal cache as
505 * well if and only if we are supposed to.
508 (s
->session_ctx
->session_cache_mode
&
509 SSL_SESS_CACHE_NO_INTERNAL_STORE
)) {
511 * The following should not return 1, otherwise, things are
514 if (SSL_CTX_add_session(s
->session_ctx
, ret
))
523 /* Now ret is non-NULL and we own one of its reference counts. */
525 if (ret
->sid_ctx_length
!= s
->sid_ctx_length
526 || memcmp(ret
->sid_ctx
, s
->sid_ctx
, ret
->sid_ctx_length
)) {
528 * We have the session requested by the client, but we don't want to
529 * use it in this context.
531 goto err
; /* treat like cache miss */
534 if ((s
->verify_mode
& SSL_VERIFY_PEER
) && s
->sid_ctx_length
== 0) {
536 * We can't be sure if this session is being used out of context,
537 * which is especially important for SSL_VERIFY_PEER. The application
538 * should have used SSL[_CTX]_set_session_id_context. For this error
539 * case, we generate an error instead of treating the event like a
540 * cache miss (otherwise it would be easy for applications to
541 * effectively disable the session cache by accident without anyone
545 SSLerr(SSL_F_SSL_GET_PREV_SESSION
,
546 SSL_R_SESSION_ID_CONTEXT_UNINITIALIZED
);
551 if (ret
->cipher
== NULL
) {
552 unsigned char buf
[5], *p
;
558 if ((ret
->ssl_version
>> 8) >= SSL3_VERSION_MAJOR
)
559 ret
->cipher
= ssl_get_cipher_by_char(s
, &(buf
[2]));
561 ret
->cipher
= ssl_get_cipher_by_char(s
, &(buf
[1]));
562 if (ret
->cipher
== NULL
)
566 if (ret
->timeout
< (long)(time(NULL
) - ret
->time
)) { /* timeout */
567 s
->session_ctx
->stats
.sess_timeout
++;
568 if (try_session_cache
) {
569 /* session was from the cache, so remove it */
570 SSL_CTX_remove_session(s
->session_ctx
, ret
);
575 s
->session_ctx
->stats
.sess_hit
++;
577 SSL_SESSION_free(s
->session
);
579 s
->verify_result
= s
->session
->verify_result
;
584 SSL_SESSION_free(ret
);
586 if (!try_session_cache
) {
588 * The session was from a ticket, so we should issue a ticket for
591 s
->tlsext_ticket_expected
= 1;
600 int SSL_CTX_add_session(SSL_CTX
*ctx
, SSL_SESSION
*c
)
606 * add just 1 reference count for the SSL_CTX's session cache even though
607 * it has two ways of access: each session is in a doubly linked list and
610 CRYPTO_add(&c
->references
, 1, CRYPTO_LOCK_SSL_SESSION
);
612 * if session c is in already in cache, we take back the increment later
615 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX
);
616 s
= lh_SSL_SESSION_insert(ctx
->sessions
, c
);
619 * s != NULL iff we already had a session with the given PID. In this
620 * case, s == c should hold (then we did not really modify
621 * ctx->sessions), or we're in trouble.
623 if (s
!= NULL
&& s
!= c
) {
624 /* We *are* in trouble ... */
625 SSL_SESSION_list_remove(ctx
, s
);
628 * ... so pretend the other session did not exist in cache (we cannot
629 * handle two SSL_SESSION structures with identical session ID in the
630 * same cache, which could happen e.g. when two threads concurrently
631 * obtain the same session from an external cache)
636 /* Put at the head of the queue unless it is already in the cache */
638 SSL_SESSION_list_add(ctx
, c
);
642 * existing cache entry -- decrement previously incremented reference
643 * count because it already takes into account the cache
646 SSL_SESSION_free(s
); /* s == c */
650 * new cache entry -- remove old ones if cache has become too large
655 if (SSL_CTX_sess_get_cache_size(ctx
) > 0) {
656 while (SSL_CTX_sess_number(ctx
) >
657 SSL_CTX_sess_get_cache_size(ctx
)) {
658 if (!remove_session_lock(ctx
, ctx
->session_cache_tail
, 0))
661 ctx
->stats
.sess_cache_full
++;
665 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX
);
669 int SSL_CTX_remove_session(SSL_CTX
*ctx
, SSL_SESSION
*c
)
671 return remove_session_lock(ctx
, c
, 1);
674 static int remove_session_lock(SSL_CTX
*ctx
, SSL_SESSION
*c
, int lck
)
679 if ((c
!= NULL
) && (c
->session_id_length
!= 0)) {
681 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX
);
682 if ((r
= lh_SSL_SESSION_retrieve(ctx
->sessions
, c
)) == c
) {
684 r
= lh_SSL_SESSION_delete(ctx
->sessions
, c
);
685 SSL_SESSION_list_remove(ctx
, c
);
689 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX
);
692 r
->not_resumable
= 1;
693 if (ctx
->remove_session_cb
!= NULL
)
694 ctx
->remove_session_cb(ctx
, r
);
702 void SSL_SESSION_free(SSL_SESSION
*ss
)
709 i
= CRYPTO_add(&ss
->references
, -1, CRYPTO_LOCK_SSL_SESSION
);
711 REF_PRINT("SSL_SESSION", ss
);
717 fprintf(stderr
, "SSL_SESSION_free, bad reference count\n");
722 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_SESSION
, ss
, &ss
->ex_data
);
724 OPENSSL_cleanse(ss
->master_key
, sizeof ss
->master_key
);
725 OPENSSL_cleanse(ss
->session_id
, sizeof ss
->session_id
);
726 ssl_sess_cert_free(ss
->sess_cert
);
728 sk_SSL_CIPHER_free(ss
->ciphers
);
729 OPENSSL_free(ss
->tlsext_hostname
);
730 OPENSSL_free(ss
->tlsext_tick
);
731 #ifndef OPENSSL_NO_EC
732 ss
->tlsext_ecpointformatlist_length
= 0;
733 OPENSSL_free(ss
->tlsext_ecpointformatlist
);
734 ss
->tlsext_ellipticcurvelist_length
= 0;
735 OPENSSL_free(ss
->tlsext_ellipticcurvelist
);
736 #endif /* OPENSSL_NO_EC */
737 #ifndef OPENSSL_NO_PSK
738 OPENSSL_free(ss
->psk_identity_hint
);
739 OPENSSL_free(ss
->psk_identity
);
741 #ifndef OPENSSL_NO_SRP
742 OPENSSL_free(ss
->srp_username
);
744 OPENSSL_clear_free(ss
, sizeof(*ss
));
747 int SSL_set_session(SSL
*s
, SSL_SESSION
*session
)
750 const SSL_METHOD
*meth
;
752 if (session
!= NULL
) {
753 meth
= s
->ctx
->method
->get_ssl_method(session
->ssl_version
);
755 meth
= s
->method
->get_ssl_method(session
->ssl_version
);
757 SSLerr(SSL_F_SSL_SET_SESSION
, SSL_R_UNABLE_TO_FIND_SSL_METHOD
);
761 if (meth
!= s
->method
) {
762 if (!SSL_set_ssl_method(s
, meth
))
766 /* CRYPTO_w_lock(CRYPTO_LOCK_SSL); */
767 CRYPTO_add(&session
->references
, 1, CRYPTO_LOCK_SSL_SESSION
);
768 SSL_SESSION_free(s
->session
);
769 s
->session
= session
;
770 s
->verify_result
= s
->session
->verify_result
;
771 /* CRYPTO_w_unlock(CRYPTO_LOCK_SSL); */
774 SSL_SESSION_free(s
->session
);
776 meth
= s
->ctx
->method
;
777 if (meth
!= s
->method
) {
778 if (!SSL_set_ssl_method(s
, meth
))
786 long SSL_SESSION_set_timeout(SSL_SESSION
*s
, long t
)
794 long SSL_SESSION_get_timeout(const SSL_SESSION
*s
)
801 long SSL_SESSION_get_time(const SSL_SESSION
*s
)
808 long SSL_SESSION_set_time(SSL_SESSION
*s
, long t
)
816 int SSL_SESSION_has_ticket(const SSL_SESSION
*s
)
818 return (s
->tlsext_ticklen
> 0) ? 1 : 0;
821 unsigned long SSL_SESSION_get_ticket_lifetime_hint(const SSL_SESSION
*s
)
823 return s
->tlsext_tick_lifetime_hint
;
826 void SSL_SESSION_get0_ticket(const SSL_SESSION
*s
, unsigned char **tick
,
829 *len
= s
->tlsext_ticklen
;
831 *tick
= s
->tlsext_tick
;
834 X509
*SSL_SESSION_get0_peer(SSL_SESSION
*s
)
839 int SSL_SESSION_set1_id_context(SSL_SESSION
*s
, const unsigned char *sid_ctx
,
840 unsigned int sid_ctx_len
)
842 if (sid_ctx_len
> SSL_MAX_SID_CTX_LENGTH
) {
843 SSLerr(SSL_F_SSL_SESSION_SET1_ID_CONTEXT
,
844 SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG
);
847 s
->sid_ctx_length
= sid_ctx_len
;
848 memcpy(s
->sid_ctx
, sid_ctx
, sid_ctx_len
);
853 long SSL_CTX_set_timeout(SSL_CTX
*s
, long t
)
858 l
= s
->session_timeout
;
859 s
->session_timeout
= t
;
863 long SSL_CTX_get_timeout(const SSL_CTX
*s
)
867 return (s
->session_timeout
);
870 int SSL_set_session_secret_cb(SSL
*s
,
871 int (*tls_session_secret_cb
) (SSL
*s
,
883 s
->tls_session_secret_cb
= tls_session_secret_cb
;
884 s
->tls_session_secret_cb_arg
= arg
;
888 int SSL_set_session_ticket_ext_cb(SSL
*s
, tls_session_ticket_ext_cb_fn cb
,
893 s
->tls_session_ticket_ext_cb
= cb
;
894 s
->tls_session_ticket_ext_cb_arg
= arg
;
898 int SSL_set_session_ticket_ext(SSL
*s
, void *ext_data
, int ext_len
)
900 if (s
->version
>= TLS1_VERSION
) {
901 OPENSSL_free(s
->tlsext_session_ticket
);
902 s
->tlsext_session_ticket
= NULL
;
903 s
->tlsext_session_ticket
=
904 OPENSSL_malloc(sizeof(TLS_SESSION_TICKET_EXT
) + ext_len
);
905 if (!s
->tlsext_session_ticket
) {
906 SSLerr(SSL_F_SSL_SET_SESSION_TICKET_EXT
, ERR_R_MALLOC_FAILURE
);
911 s
->tlsext_session_ticket
->length
= ext_len
;
912 s
->tlsext_session_ticket
->data
= s
->tlsext_session_ticket
+ 1;
913 memcpy(s
->tlsext_session_ticket
->data
, ext_data
, ext_len
);
915 s
->tlsext_session_ticket
->length
= 0;
916 s
->tlsext_session_ticket
->data
= NULL
;
925 typedef struct timeout_param_st
{
928 LHASH_OF(SSL_SESSION
) *cache
;
931 static void timeout_doall_arg(SSL_SESSION
*s
, TIMEOUT_PARAM
*p
)
933 if ((p
->time
== 0) || (p
->time
> (s
->time
+ s
->timeout
))) { /* timeout */
935 * The reason we don't call SSL_CTX_remove_session() is to save on
938 (void)lh_SSL_SESSION_delete(p
->cache
, s
);
939 SSL_SESSION_list_remove(p
->ctx
, s
);
940 s
->not_resumable
= 1;
941 if (p
->ctx
->remove_session_cb
!= NULL
)
942 p
->ctx
->remove_session_cb(p
->ctx
, s
);
947 static IMPLEMENT_LHASH_DOALL_ARG_FN(timeout
, SSL_SESSION
, TIMEOUT_PARAM
)
949 void SSL_CTX_flush_sessions(SSL_CTX
*s
, long t
)
955 tp
.cache
= s
->sessions
;
956 if (tp
.cache
== NULL
)
959 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX
);
960 i
= CHECKED_LHASH_OF(SSL_SESSION
, tp
.cache
)->down_load
;
961 CHECKED_LHASH_OF(SSL_SESSION
, tp
.cache
)->down_load
= 0;
962 lh_SSL_SESSION_doall_arg(tp
.cache
, LHASH_DOALL_ARG_FN(timeout
),
964 CHECKED_LHASH_OF(SSL_SESSION
, tp
.cache
)->down_load
= i
;
965 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX
);
968 int ssl_clear_bad_session(SSL
*s
)
970 if ((s
->session
!= NULL
) &&
971 !(s
->shutdown
& SSL_SENT_SHUTDOWN
) &&
972 !(SSL_in_init(s
) || SSL_in_before(s
))) {
973 SSL_CTX_remove_session(s
->ctx
, s
->session
);
979 /* locked by SSL_CTX in the calling function */
980 static void SSL_SESSION_list_remove(SSL_CTX
*ctx
, SSL_SESSION
*s
)
982 if ((s
->next
== NULL
) || (s
->prev
== NULL
))
985 if (s
->next
== (SSL_SESSION
*)&(ctx
->session_cache_tail
)) {
986 /* last element in list */
987 if (s
->prev
== (SSL_SESSION
*)&(ctx
->session_cache_head
)) {
988 /* only one element in list */
989 ctx
->session_cache_head
= NULL
;
990 ctx
->session_cache_tail
= NULL
;
992 ctx
->session_cache_tail
= s
->prev
;
993 s
->prev
->next
= (SSL_SESSION
*)&(ctx
->session_cache_tail
);
996 if (s
->prev
== (SSL_SESSION
*)&(ctx
->session_cache_head
)) {
997 /* first element in list */
998 ctx
->session_cache_head
= s
->next
;
999 s
->next
->prev
= (SSL_SESSION
*)&(ctx
->session_cache_head
);
1001 /* middle of list */
1002 s
->next
->prev
= s
->prev
;
1003 s
->prev
->next
= s
->next
;
1006 s
->prev
= s
->next
= NULL
;
1009 static void SSL_SESSION_list_add(SSL_CTX
*ctx
, SSL_SESSION
*s
)
1011 if ((s
->next
!= NULL
) && (s
->prev
!= NULL
))
1012 SSL_SESSION_list_remove(ctx
, s
);
1014 if (ctx
->session_cache_head
== NULL
) {
1015 ctx
->session_cache_head
= s
;
1016 ctx
->session_cache_tail
= s
;
1017 s
->prev
= (SSL_SESSION
*)&(ctx
->session_cache_head
);
1018 s
->next
= (SSL_SESSION
*)&(ctx
->session_cache_tail
);
1020 s
->next
= ctx
->session_cache_head
;
1022 s
->prev
= (SSL_SESSION
*)&(ctx
->session_cache_head
);
1023 ctx
->session_cache_head
= s
;
1027 void SSL_CTX_sess_set_new_cb(SSL_CTX
*ctx
,
1028 int (*cb
) (struct ssl_st
*ssl
,
1031 ctx
->new_session_cb
= cb
;
1034 int (*SSL_CTX_sess_get_new_cb(SSL_CTX
*ctx
)) (SSL
*ssl
, SSL_SESSION
*sess
) {
1035 return ctx
->new_session_cb
;
1038 void SSL_CTX_sess_set_remove_cb(SSL_CTX
*ctx
,
1039 void (*cb
) (SSL_CTX
*ctx
, SSL_SESSION
*sess
))
1041 ctx
->remove_session_cb
= cb
;
1044 void (*SSL_CTX_sess_get_remove_cb(SSL_CTX
*ctx
)) (SSL_CTX
*ctx
,
1045 SSL_SESSION
*sess
) {
1046 return ctx
->remove_session_cb
;
1049 void SSL_CTX_sess_set_get_cb(SSL_CTX
*ctx
,
1050 SSL_SESSION
*(*cb
) (struct ssl_st
*ssl
,
1051 unsigned char *data
, int len
,
1054 ctx
->get_session_cb
= cb
;
1057 SSL_SESSION
*(*SSL_CTX_sess_get_get_cb(SSL_CTX
*ctx
)) (SSL
*ssl
,
1058 unsigned char *data
,
1059 int len
, int *copy
) {
1060 return ctx
->get_session_cb
;
1063 void SSL_CTX_set_info_callback(SSL_CTX
*ctx
,
1064 void (*cb
) (const SSL
*ssl
, int type
, int val
))
1066 ctx
->info_callback
= cb
;
1069 void (*SSL_CTX_get_info_callback(SSL_CTX
*ctx
)) (const SSL
*ssl
, int type
,
1071 return ctx
->info_callback
;
1074 void SSL_CTX_set_client_cert_cb(SSL_CTX
*ctx
,
1075 int (*cb
) (SSL
*ssl
, X509
**x509
,
1078 ctx
->client_cert_cb
= cb
;
1081 int (*SSL_CTX_get_client_cert_cb(SSL_CTX
*ctx
)) (SSL
*ssl
, X509
**x509
,
1083 return ctx
->client_cert_cb
;
1086 #ifndef OPENSSL_NO_ENGINE
1087 int SSL_CTX_set_client_cert_engine(SSL_CTX
*ctx
, ENGINE
*e
)
1089 if (!ENGINE_init(e
)) {
1090 SSLerr(SSL_F_SSL_CTX_SET_CLIENT_CERT_ENGINE
, ERR_R_ENGINE_LIB
);
1093 if (!ENGINE_get_ssl_client_cert_function(e
)) {
1094 SSLerr(SSL_F_SSL_CTX_SET_CLIENT_CERT_ENGINE
,
1095 SSL_R_NO_CLIENT_CERT_METHOD
);
1099 ctx
->client_cert_engine
= e
;
1104 void SSL_CTX_set_cookie_generate_cb(SSL_CTX
*ctx
,
1105 int (*cb
) (SSL
*ssl
,
1106 unsigned char *cookie
,
1107 unsigned int *cookie_len
))
1109 ctx
->app_gen_cookie_cb
= cb
;
1112 void SSL_CTX_set_cookie_verify_cb(SSL_CTX
*ctx
,
1113 int (*cb
) (SSL
*ssl
, unsigned char *cookie
,
1114 unsigned int cookie_len
))
1116 ctx
->app_verify_cookie_cb
= cb
;
1119 IMPLEMENT_PEM_rw(SSL_SESSION
, SSL_SESSION
, PEM_STRING_SSL_SESSION
,