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 */
160 /* Need to lock this all up rather than just use CRYPTO_add so that
161 * somebody doesn't free ssl->session between when we check it's
162 * non-null and when we up the reference count. */
163 CRYPTO_w_lock(CRYPTO_LOCK_SSL_SESSION
);
167 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_SESSION
);
171 int SSL_SESSION_get_ex_new_index(long argl
, void *argp
, CRYPTO_EX_new
*new_func
,
172 CRYPTO_EX_dup
*dup_func
, CRYPTO_EX_free
*free_func
)
174 return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL_SESSION
, argl
, argp
,
175 new_func
, dup_func
, free_func
);
178 int SSL_SESSION_set_ex_data(SSL_SESSION
*s
, int idx
, void *arg
)
180 return(CRYPTO_set_ex_data(&s
->ex_data
,idx
,arg
));
183 void *SSL_SESSION_get_ex_data(const SSL_SESSION
*s
, int idx
)
185 return(CRYPTO_get_ex_data(&s
->ex_data
,idx
));
188 SSL_SESSION
*SSL_SESSION_new(void)
192 ss
=(SSL_SESSION
*)OPENSSL_malloc(sizeof(SSL_SESSION
));
195 SSLerr(SSL_F_SSL_SESSION_NEW
,ERR_R_MALLOC_FAILURE
);
198 memset(ss
,0,sizeof(SSL_SESSION
));
200 ss
->verify_result
= 1; /* avoid 0 (= X509_V_OK) just in case */
202 ss
->timeout
=60*5+4; /* 5 minute timeout by default */
203 ss
->time
=(unsigned long)time(NULL
);
207 #ifndef OPENSSL_NO_TLSEXT
208 ss
->tlsext_hostname
= NULL
;
209 #ifndef OPENSSL_NO_EC
210 ss
->tlsext_ecpointformatlist_length
= 0;
211 ss
->tlsext_ecpointformatlist
= NULL
;
212 ss
->tlsext_ellipticcurvelist_length
= 0;
213 ss
->tlsext_ellipticcurvelist
= NULL
;
216 CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_SESSION
, ss
, &ss
->ex_data
);
217 #ifndef OPENSSL_NO_PSK
218 ss
->psk_identity_hint
=NULL
;
219 ss
->psk_identity
=NULL
;
221 #ifndef OPENSSL_NO_SRP
222 ss
->srp_username
=NULL
;
227 const unsigned char *SSL_SESSION_get_id(const SSL_SESSION
*s
, unsigned int *len
)
230 *len
= s
->session_id_length
;
231 return s
->session_id
;
234 unsigned int SSL_SESSION_get_compress_id(const SSL_SESSION
*s
)
236 return s
->compress_meth
;
239 /* SSLv3/TLSv1 has 32 bytes (256 bits) of session ID space. As such, filling
240 * the ID with random junk repeatedly
241 * until we have no conflict is going to complete in one iteration pretty much
242 * "most" of the time (btw: understatement). So, if it takes us 10 iterations
243 * and we still can't avoid a conflict - well that's a reasonable point to call
244 * it quits. Either the RAND code is broken or someone is trying to open roughly
245 * very close to 2^256 SSL sessions to our server. How you might
246 * store that many sessions is perhaps a more interesting question ... */
248 #define MAX_SESS_ID_ATTEMPTS 10
249 static int def_generate_session_id(const SSL
*ssl
, unsigned char *id
,
250 unsigned int *id_len
)
252 unsigned int retry
= 0;
254 if (RAND_pseudo_bytes(id
, *id_len
) <= 0)
256 while(SSL_has_matching_session_id(ssl
, id
, *id_len
) &&
257 (++retry
< MAX_SESS_ID_ATTEMPTS
));
258 if(retry
< MAX_SESS_ID_ATTEMPTS
)
260 /* else - woops a session_id match */
261 /* XXX We should also check the external cache --
262 * but the probability of a collision is negligible, and
263 * we could not prevent the concurrent creation of sessions
264 * with identical IDs since we currently don't have means
265 * to atomically check whether a session ID already exists
266 * and make a reservation for it if it does not
267 * (this problem applies to the internal cache as well).
272 int ssl_get_new_session(SSL
*s
, int session
)
274 /* This gets used by clients and servers. */
277 SSL_SESSION
*ss
=NULL
;
278 GEN_SESSION_CB cb
= def_generate_session_id
;
280 if ((ss
=SSL_SESSION_new()) == NULL
) return(0);
282 /* If the context has a default timeout, use it */
283 if (s
->session_ctx
->session_timeout
== 0)
284 ss
->timeout
=SSL_get_default_timeout(s
);
286 ss
->timeout
=s
->session_ctx
->session_timeout
;
288 if (s
->session
!= NULL
)
290 SSL_SESSION_free(s
->session
);
296 if (s
->version
== SSL3_VERSION
)
298 ss
->ssl_version
=SSL3_VERSION
;
299 ss
->session_id_length
=SSL3_SSL_SESSION_ID_LENGTH
;
301 else if (s
->version
== TLS1_VERSION
)
303 ss
->ssl_version
=TLS1_VERSION
;
304 ss
->session_id_length
=SSL3_SSL_SESSION_ID_LENGTH
;
306 else if (s
->version
== TLS1_1_VERSION
)
308 ss
->ssl_version
=TLS1_1_VERSION
;
309 ss
->session_id_length
=SSL3_SSL_SESSION_ID_LENGTH
;
311 else if (s
->version
== TLS1_2_VERSION
)
313 ss
->ssl_version
=TLS1_2_VERSION
;
314 ss
->session_id_length
=SSL3_SSL_SESSION_ID_LENGTH
;
316 else if (s
->version
== DTLS1_BAD_VER
)
318 ss
->ssl_version
=DTLS1_BAD_VER
;
319 ss
->session_id_length
=SSL3_SSL_SESSION_ID_LENGTH
;
321 else if (s
->version
== DTLS1_VERSION
)
323 ss
->ssl_version
=DTLS1_VERSION
;
324 ss
->session_id_length
=SSL3_SSL_SESSION_ID_LENGTH
;
326 else if (s
->version
== DTLS1_2_VERSION
)
328 ss
->ssl_version
=DTLS1_2_VERSION
;
329 ss
->session_id_length
=SSL3_SSL_SESSION_ID_LENGTH
;
333 SSLerr(SSL_F_SSL_GET_NEW_SESSION
,SSL_R_UNSUPPORTED_SSL_VERSION
);
334 SSL_SESSION_free(ss
);
337 #ifndef OPENSSL_NO_TLSEXT
339 * If RFC5077 ticket, use empty session ID (as server).
341 * (a) ssl_get_prev_session() does lookahead into the
342 * ClientHello extensions to find the session ticket.
343 * When ssl_get_prev_session() fails, s3_srvr.c calls
344 * ssl_get_new_session() in ssl3_get_client_hello().
345 * At that point, it has not yet parsed the extensions,
346 * however, because of the lookahead, it already knows
347 * whether a ticket is expected or not.
349 * (b) s3_clnt.c calls ssl_get_new_session() before parsing
350 * ServerHello extensions, and before recording the session
351 * ID received from the server, so this block is a noop.
353 if (s
->tlsext_ticket_expected
)
355 ss
->session_id_length
= 0;
359 /* Choose which callback will set the session ID */
360 CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX
);
361 if(s
->generate_session_id
)
362 cb
= s
->generate_session_id
;
363 else if(s
->session_ctx
->generate_session_id
)
364 cb
= s
->session_ctx
->generate_session_id
;
365 CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX
);
366 /* Choose a session ID */
367 tmp
= ss
->session_id_length
;
368 if(!cb(s
, ss
->session_id
, &tmp
))
370 /* The callback failed */
371 SSLerr(SSL_F_SSL_GET_NEW_SESSION
,
372 SSL_R_SSL_SESSION_ID_CALLBACK_FAILED
);
373 SSL_SESSION_free(ss
);
376 /* Don't allow the callback to set the session length to zero.
377 * nor set it higher than it was. */
378 if(!tmp
|| (tmp
> ss
->session_id_length
))
380 /* The callback set an illegal length */
381 SSLerr(SSL_F_SSL_GET_NEW_SESSION
,
382 SSL_R_SSL_SESSION_ID_HAS_BAD_LENGTH
);
383 SSL_SESSION_free(ss
);
386 ss
->session_id_length
= tmp
;
387 /* Finally, check for a conflict */
388 if(SSL_has_matching_session_id(s
, ss
->session_id
,
389 ss
->session_id_length
))
391 SSLerr(SSL_F_SSL_GET_NEW_SESSION
,
392 SSL_R_SSL_SESSION_ID_CONFLICT
);
393 SSL_SESSION_free(ss
);
396 #ifndef OPENSSL_NO_TLSEXT
398 if (s
->tlsext_hostname
) {
399 ss
->tlsext_hostname
= BUF_strdup(s
->tlsext_hostname
);
400 if (ss
->tlsext_hostname
== NULL
) {
401 SSLerr(SSL_F_SSL_GET_NEW_SESSION
, ERR_R_INTERNAL_ERROR
);
402 SSL_SESSION_free(ss
);
410 ss
->session_id_length
=0;
413 if (s
->sid_ctx_length
> sizeof ss
->sid_ctx
)
415 SSLerr(SSL_F_SSL_GET_NEW_SESSION
, ERR_R_INTERNAL_ERROR
);
416 SSL_SESSION_free(ss
);
419 memcpy(ss
->sid_ctx
,s
->sid_ctx
,s
->sid_ctx_length
);
420 ss
->sid_ctx_length
=s
->sid_ctx_length
;
422 ss
->ssl_version
=s
->version
;
423 ss
->verify_result
= X509_V_OK
;
429 * ssl_get_prev attempts to find an SSL_SESSION to be used to resume this
430 * connection. It is only called by servers.
432 * session_id: points at the session ID in the ClientHello. This code will
433 * read past the end of this in order to parse out the session ticket
435 * len: the length of the session ID.
436 * limit: a pointer to the first byte after the ClientHello.
440 * 0: a session may have been found.
443 * - If a session is found then s->session is pointed at it (after freeing an
444 * existing session if need be) and s->verify_result is set from the session.
445 * - Both for new and resumed sessions, s->tlsext_ticket_expected is set to 1
446 * if the server should issue a new session ticket (to 0 otherwise).
448 int ssl_get_prev_session(SSL
*s
, unsigned char *session_id
, int len
,
449 const unsigned char *limit
)
451 /* This is used only by servers. */
453 SSL_SESSION
*ret
=NULL
;
455 int try_session_cache
= 1;
456 #ifndef OPENSSL_NO_TLSEXT
460 if (len
> SSL_MAX_SSL_SESSION_ID_LENGTH
)
464 try_session_cache
= 0;
466 #ifndef OPENSSL_NO_TLSEXT
467 r
= tls1_process_ticket(s
, session_id
, len
, limit
, &ret
); /* sets s->tlsext_ticket_expected */
470 case -1: /* Error during processing */
473 case 0: /* No ticket found */
474 case 1: /* Zero length ticket found */
475 break; /* Ok to carry on processing session id. */
476 case 2: /* Ticket found but not decrypted. */
477 case 3: /* Ticket decrypted, *ret has been set. */
478 try_session_cache
= 0;
485 if (try_session_cache
&&
487 !(s
->session_ctx
->session_cache_mode
& SSL_SESS_CACHE_NO_INTERNAL_LOOKUP
))
490 data
.ssl_version
=s
->version
;
491 data
.session_id_length
=len
;
494 memcpy(data
.session_id
,session_id
,len
);
495 CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX
);
496 ret
=lh_SSL_SESSION_retrieve(s
->session_ctx
->sessions
,&data
);
499 /* don't allow other threads to steal it: */
500 CRYPTO_add(&ret
->references
,1,CRYPTO_LOCK_SSL_SESSION
);
502 CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX
);
504 s
->session_ctx
->stats
.sess_miss
++;
507 if (try_session_cache
&&
509 s
->session_ctx
->get_session_cb
!= NULL
)
513 if ((ret
=s
->session_ctx
->get_session_cb(s
,session_id
,len
,©
)))
515 s
->session_ctx
->stats
.sess_cb_hit
++;
517 /* Increment reference count now if the session callback
518 * asks us to do so (note that if the session structures
519 * returned by the callback are shared between threads,
520 * it must handle the reference count itself [i.e. copy == 0],
521 * or things won't be thread-safe). */
523 CRYPTO_add(&ret
->references
,1,CRYPTO_LOCK_SSL_SESSION
);
525 /* Add the externally cached session to the internal
526 * cache as well if and only if we are supposed to. */
527 if(!(s
->session_ctx
->session_cache_mode
& SSL_SESS_CACHE_NO_INTERNAL_STORE
))
528 /* The following should not return 1, otherwise,
529 * things are very strange */
530 SSL_CTX_add_session(s
->session_ctx
,ret
);
537 /* Now ret is non-NULL and we own one of its reference counts. */
539 if (ret
->sid_ctx_length
!= s
->sid_ctx_length
540 || memcmp(ret
->sid_ctx
,s
->sid_ctx
,ret
->sid_ctx_length
))
542 /* We have the session requested by the client, but we don't
543 * want to use it in this context. */
544 goto err
; /* treat like cache miss */
547 if((s
->verify_mode
& SSL_VERIFY_PEER
) && s
->sid_ctx_length
== 0)
549 /* We can't be sure if this session is being used out of
550 * context, which is especially important for SSL_VERIFY_PEER.
551 * The application should have used SSL[_CTX]_set_session_id_context.
553 * For this error case, we generate an error instead of treating
554 * the event like a cache miss (otherwise it would be easy for
555 * applications to effectively disable the session cache by
556 * accident without anyone noticing).
559 SSLerr(SSL_F_SSL_GET_PREV_SESSION
,SSL_R_SESSION_ID_CONTEXT_UNINITIALIZED
);
564 if (ret
->cipher
== NULL
)
566 unsigned char buf
[5],*p
;
572 if ((ret
->ssl_version
>>8) >= SSL3_VERSION_MAJOR
)
573 ret
->cipher
=ssl_get_cipher_by_char(s
,&(buf
[2]));
575 ret
->cipher
=ssl_get_cipher_by_char(s
,&(buf
[1]));
576 if (ret
->cipher
== NULL
)
580 if (ret
->timeout
< (long)(time(NULL
) - ret
->time
)) /* timeout */
582 s
->session_ctx
->stats
.sess_timeout
++;
583 if (try_session_cache
)
585 /* session was from the cache, so remove it */
586 SSL_CTX_remove_session(s
->session_ctx
,ret
);
591 s
->session_ctx
->stats
.sess_hit
++;
593 if (s
->session
!= NULL
)
594 SSL_SESSION_free(s
->session
);
596 s
->verify_result
= s
->session
->verify_result
;
602 SSL_SESSION_free(ret
);
603 #ifndef OPENSSL_NO_TLSEXT
604 if (!try_session_cache
)
606 /* The session was from a ticket, so we should
607 * issue a ticket for the new session */
608 s
->tlsext_ticket_expected
= 1;
618 int SSL_CTX_add_session(SSL_CTX
*ctx
, SSL_SESSION
*c
)
623 /* add just 1 reference count for the SSL_CTX's session cache
624 * even though it has two ways of access: each session is in a
625 * doubly linked list and an lhash */
626 CRYPTO_add(&c
->references
,1,CRYPTO_LOCK_SSL_SESSION
);
627 /* if session c is in already in cache, we take back the increment later */
629 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX
);
630 s
=lh_SSL_SESSION_insert(ctx
->sessions
,c
);
632 /* s != NULL iff we already had a session with the given PID.
633 * In this case, s == c should hold (then we did not really modify
634 * ctx->sessions), or we're in trouble. */
635 if (s
!= NULL
&& s
!= c
)
637 /* We *are* in trouble ... */
638 SSL_SESSION_list_remove(ctx
,s
);
640 /* ... so pretend the other session did not exist in cache
641 * (we cannot handle two SSL_SESSION structures with identical
642 * session ID in the same cache, which could happen e.g. when
643 * two threads concurrently obtain the same session from an external
648 /* Put at the head of the queue unless it is already in the cache */
650 SSL_SESSION_list_add(ctx
,c
);
654 /* existing cache entry -- decrement previously incremented reference
655 * count because it already takes into account the cache */
657 SSL_SESSION_free(s
); /* s == c */
662 /* new cache entry -- remove old ones if cache has become too large */
666 if (SSL_CTX_sess_get_cache_size(ctx
) > 0)
668 while (SSL_CTX_sess_number(ctx
) >
669 SSL_CTX_sess_get_cache_size(ctx
))
671 if (!remove_session_lock(ctx
,
672 ctx
->session_cache_tail
, 0))
675 ctx
->stats
.sess_cache_full
++;
679 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX
);
683 int SSL_CTX_remove_session(SSL_CTX
*ctx
, SSL_SESSION
*c
)
685 return remove_session_lock(ctx
, c
, 1);
688 static int remove_session_lock(SSL_CTX
*ctx
, SSL_SESSION
*c
, int lck
)
693 if ((c
!= NULL
) && (c
->session_id_length
!= 0))
695 if(lck
) CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX
);
696 if ((r
= lh_SSL_SESSION_retrieve(ctx
->sessions
,c
)) == c
)
699 r
=lh_SSL_SESSION_delete(ctx
->sessions
,c
);
700 SSL_SESSION_list_remove(ctx
,c
);
703 if(lck
) CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX
);
708 if (ctx
->remove_session_cb
!= NULL
)
709 ctx
->remove_session_cb(ctx
,r
);
718 void SSL_SESSION_free(SSL_SESSION
*ss
)
725 i
=CRYPTO_add(&ss
->references
,-1,CRYPTO_LOCK_SSL_SESSION
);
727 REF_PRINT("SSL_SESSION",ss
);
733 fprintf(stderr
,"SSL_SESSION_free, bad reference count\n");
738 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_SESSION
, ss
, &ss
->ex_data
);
740 OPENSSL_cleanse(ss
->master_key
,sizeof ss
->master_key
);
741 OPENSSL_cleanse(ss
->session_id
,sizeof ss
->session_id
);
742 if (ss
->sess_cert
!= NULL
) ssl_sess_cert_free(ss
->sess_cert
);
743 if (ss
->peer
!= NULL
) X509_free(ss
->peer
);
744 if (ss
->ciphers
!= NULL
) sk_SSL_CIPHER_free(ss
->ciphers
);
745 #ifndef OPENSSL_NO_TLSEXT
746 if (ss
->tlsext_hostname
!= NULL
) OPENSSL_free(ss
->tlsext_hostname
);
747 if (ss
->tlsext_tick
!= NULL
) OPENSSL_free(ss
->tlsext_tick
);
748 #ifndef OPENSSL_NO_EC
749 ss
->tlsext_ecpointformatlist_length
= 0;
750 if (ss
->tlsext_ecpointformatlist
!= NULL
) OPENSSL_free(ss
->tlsext_ecpointformatlist
);
751 ss
->tlsext_ellipticcurvelist_length
= 0;
752 if (ss
->tlsext_ellipticcurvelist
!= NULL
) OPENSSL_free(ss
->tlsext_ellipticcurvelist
);
753 #endif /* OPENSSL_NO_EC */
755 #ifndef OPENSSL_NO_PSK
756 if (ss
->psk_identity_hint
!= NULL
)
757 OPENSSL_free(ss
->psk_identity_hint
);
758 if (ss
->psk_identity
!= NULL
)
759 OPENSSL_free(ss
->psk_identity
);
761 #ifndef OPENSSL_NO_SRP
762 if (ss
->srp_username
!= NULL
)
763 OPENSSL_free(ss
->srp_username
);
765 OPENSSL_cleanse(ss
,sizeof(*ss
));
769 int SSL_set_session(SSL
*s
, SSL_SESSION
*session
)
772 const SSL_METHOD
*meth
;
776 meth
=s
->ctx
->method
->get_ssl_method(session
->ssl_version
);
778 meth
=s
->method
->get_ssl_method(session
->ssl_version
);
781 SSLerr(SSL_F_SSL_SET_SESSION
,SSL_R_UNABLE_TO_FIND_SSL_METHOD
);
785 if (meth
!= s
->method
)
787 if (!SSL_set_ssl_method(s
,meth
))
791 #ifndef OPENSSL_NO_KRB5
792 if (s
->kssl_ctx
&& !s
->kssl_ctx
->client_princ
&&
793 session
->krb5_client_princ_len
> 0)
795 s
->kssl_ctx
->client_princ
= (char *)OPENSSL_malloc(session
->krb5_client_princ_len
+ 1);
796 if (s
->kssl_ctx
->client_princ
== NULL
)
798 SSLerr(SSL_F_SSL_SET_SESSION
, ERR_R_MALLOC_FAILURE
);
801 memcpy(s
->kssl_ctx
->client_princ
,session
->krb5_client_princ
,
802 session
->krb5_client_princ_len
);
803 s
->kssl_ctx
->client_princ
[session
->krb5_client_princ_len
] = '\0';
805 #endif /* OPENSSL_NO_KRB5 */
807 /* CRYPTO_w_lock(CRYPTO_LOCK_SSL);*/
808 CRYPTO_add(&session
->references
,1,CRYPTO_LOCK_SSL_SESSION
);
809 if (s
->session
!= NULL
)
810 SSL_SESSION_free(s
->session
);
812 s
->verify_result
= s
->session
->verify_result
;
813 /* CRYPTO_w_unlock(CRYPTO_LOCK_SSL);*/
818 if (s
->session
!= NULL
)
820 SSL_SESSION_free(s
->session
);
825 if (meth
!= s
->method
)
827 if (!SSL_set_ssl_method(s
,meth
))
835 long SSL_SESSION_set_timeout(SSL_SESSION
*s
, long t
)
837 if (s
== NULL
) return(0);
842 long SSL_SESSION_get_timeout(const SSL_SESSION
*s
)
844 if (s
== NULL
) return(0);
848 long SSL_SESSION_get_time(const SSL_SESSION
*s
)
850 if (s
== NULL
) return(0);
854 long SSL_SESSION_set_time(SSL_SESSION
*s
, long t
)
856 if (s
== NULL
) return(0);
861 X509
*SSL_SESSION_get0_peer(SSL_SESSION
*s
)
866 int SSL_SESSION_set1_id_context(SSL_SESSION
*s
,const unsigned char *sid_ctx
,
867 unsigned int sid_ctx_len
)
869 if(sid_ctx_len
> SSL_MAX_SID_CTX_LENGTH
)
871 SSLerr(SSL_F_SSL_SESSION_SET1_ID_CONTEXT
,SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG
);
874 s
->sid_ctx_length
=sid_ctx_len
;
875 memcpy(s
->sid_ctx
,sid_ctx
,sid_ctx_len
);
880 long SSL_CTX_set_timeout(SSL_CTX
*s
, long t
)
883 if (s
== NULL
) return(0);
884 l
=s
->session_timeout
;
885 s
->session_timeout
=t
;
889 long SSL_CTX_get_timeout(const SSL_CTX
*s
)
891 if (s
== NULL
) return(0);
892 return(s
->session_timeout
);
895 #ifndef OPENSSL_NO_TLSEXT
896 int SSL_set_session_secret_cb(SSL
*s
, int (*tls_session_secret_cb
)(SSL
*s
, void *secret
, int *secret_len
,
897 STACK_OF(SSL_CIPHER
) *peer_ciphers
, SSL_CIPHER
**cipher
, void *arg
), void *arg
)
899 if (s
== NULL
) return(0);
900 s
->tls_session_secret_cb
= tls_session_secret_cb
;
901 s
->tls_session_secret_cb_arg
= arg
;
905 int SSL_set_session_ticket_ext_cb(SSL
*s
, tls_session_ticket_ext_cb_fn cb
,
908 if (s
== NULL
) return(0);
909 s
->tls_session_ticket_ext_cb
= cb
;
910 s
->tls_session_ticket_ext_cb_arg
= arg
;
914 int SSL_set_session_ticket_ext(SSL
*s
, void *ext_data
, int ext_len
)
916 if (s
->version
>= TLS1_VERSION
)
918 if (s
->tlsext_session_ticket
)
920 OPENSSL_free(s
->tlsext_session_ticket
);
921 s
->tlsext_session_ticket
= NULL
;
924 s
->tlsext_session_ticket
= OPENSSL_malloc(sizeof(TLS_SESSION_TICKET_EXT
) + ext_len
);
925 if (!s
->tlsext_session_ticket
)
927 SSLerr(SSL_F_SSL_SET_SESSION_TICKET_EXT
, ERR_R_MALLOC_FAILURE
);
933 s
->tlsext_session_ticket
->length
= ext_len
;
934 s
->tlsext_session_ticket
->data
= s
->tlsext_session_ticket
+ 1;
935 memcpy(s
->tlsext_session_ticket
->data
, ext_data
, ext_len
);
939 s
->tlsext_session_ticket
->length
= 0;
940 s
->tlsext_session_ticket
->data
= NULL
;
948 #endif /* OPENSSL_NO_TLSEXT */
950 typedef struct timeout_param_st
954 LHASH_OF(SSL_SESSION
) *cache
;
957 static void timeout_doall_arg(SSL_SESSION
*s
, TIMEOUT_PARAM
*p
)
959 if ((p
->time
== 0) || (p
->time
> (s
->time
+s
->timeout
))) /* timeout */
961 /* The reason we don't call SSL_CTX_remove_session() is to
962 * save on locking overhead */
963 (void)lh_SSL_SESSION_delete(p
->cache
,s
);
964 SSL_SESSION_list_remove(p
->ctx
,s
);
966 if (p
->ctx
->remove_session_cb
!= NULL
)
967 p
->ctx
->remove_session_cb(p
->ctx
,s
);
972 static IMPLEMENT_LHASH_DOALL_ARG_FN(timeout
, SSL_SESSION
, TIMEOUT_PARAM
)
974 void SSL_CTX_flush_sessions(SSL_CTX
*s
, long t
)
980 tp
.cache
=s
->sessions
;
981 if (tp
.cache
== NULL
) return;
983 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX
);
984 i
=CHECKED_LHASH_OF(SSL_SESSION
, tp
.cache
)->down_load
;
985 CHECKED_LHASH_OF(SSL_SESSION
, tp
.cache
)->down_load
=0;
986 lh_SSL_SESSION_doall_arg(tp
.cache
, LHASH_DOALL_ARG_FN(timeout
),
988 CHECKED_LHASH_OF(SSL_SESSION
, tp
.cache
)->down_load
=i
;
989 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX
);
992 int ssl_clear_bad_session(SSL
*s
)
994 if ( (s
->session
!= NULL
) &&
995 !(s
->shutdown
& SSL_SENT_SHUTDOWN
) &&
996 !(SSL_in_init(s
) || SSL_in_before(s
)))
998 SSL_CTX_remove_session(s
->ctx
,s
->session
);
1005 /* locked by SSL_CTX in the calling function */
1006 static void SSL_SESSION_list_remove(SSL_CTX
*ctx
, SSL_SESSION
*s
)
1008 if ((s
->next
== NULL
) || (s
->prev
== NULL
)) return;
1010 if (s
->next
== (SSL_SESSION
*)&(ctx
->session_cache_tail
))
1011 { /* last element in list */
1012 if (s
->prev
== (SSL_SESSION
*)&(ctx
->session_cache_head
))
1013 { /* only one element in list */
1014 ctx
->session_cache_head
=NULL
;
1015 ctx
->session_cache_tail
=NULL
;
1019 ctx
->session_cache_tail
=s
->prev
;
1020 s
->prev
->next
=(SSL_SESSION
*)&(ctx
->session_cache_tail
);
1025 if (s
->prev
== (SSL_SESSION
*)&(ctx
->session_cache_head
))
1026 { /* first element in list */
1027 ctx
->session_cache_head
=s
->next
;
1028 s
->next
->prev
=(SSL_SESSION
*)&(ctx
->session_cache_head
);
1031 { /* middle of list */
1032 s
->next
->prev
=s
->prev
;
1033 s
->prev
->next
=s
->next
;
1036 s
->prev
=s
->next
=NULL
;
1039 static void SSL_SESSION_list_add(SSL_CTX
*ctx
, SSL_SESSION
*s
)
1041 if ((s
->next
!= NULL
) && (s
->prev
!= NULL
))
1042 SSL_SESSION_list_remove(ctx
,s
);
1044 if (ctx
->session_cache_head
== NULL
)
1046 ctx
->session_cache_head
=s
;
1047 ctx
->session_cache_tail
=s
;
1048 s
->prev
=(SSL_SESSION
*)&(ctx
->session_cache_head
);
1049 s
->next
=(SSL_SESSION
*)&(ctx
->session_cache_tail
);
1053 s
->next
=ctx
->session_cache_head
;
1055 s
->prev
=(SSL_SESSION
*)&(ctx
->session_cache_head
);
1056 ctx
->session_cache_head
=s
;
1060 void SSL_CTX_sess_set_new_cb(SSL_CTX
*ctx
,
1061 int (*cb
)(struct ssl_st
*ssl
,SSL_SESSION
*sess
))
1063 ctx
->new_session_cb
=cb
;
1066 int (*SSL_CTX_sess_get_new_cb(SSL_CTX
*ctx
))(SSL
*ssl
, SSL_SESSION
*sess
)
1068 return ctx
->new_session_cb
;
1071 void SSL_CTX_sess_set_remove_cb(SSL_CTX
*ctx
,
1072 void (*cb
)(SSL_CTX
*ctx
,SSL_SESSION
*sess
))
1074 ctx
->remove_session_cb
=cb
;
1077 void (*SSL_CTX_sess_get_remove_cb(SSL_CTX
*ctx
))(SSL_CTX
* ctx
,SSL_SESSION
*sess
)
1079 return ctx
->remove_session_cb
;
1082 void SSL_CTX_sess_set_get_cb(SSL_CTX
*ctx
,
1083 SSL_SESSION
*(*cb
)(struct ssl_st
*ssl
,
1084 unsigned char *data
,int len
,int *copy
))
1086 ctx
->get_session_cb
=cb
;
1089 SSL_SESSION
* (*SSL_CTX_sess_get_get_cb(SSL_CTX
*ctx
))(SSL
*ssl
,
1090 unsigned char *data
,int len
,int *copy
)
1092 return ctx
->get_session_cb
;
1095 void SSL_CTX_set_info_callback(SSL_CTX
*ctx
,
1096 void (*cb
)(const SSL
*ssl
,int type
,int val
))
1098 ctx
->info_callback
=cb
;
1101 void (*SSL_CTX_get_info_callback(SSL_CTX
*ctx
))(const SSL
*ssl
,int type
,int val
)
1103 return ctx
->info_callback
;
1106 void SSL_CTX_set_client_cert_cb(SSL_CTX
*ctx
,
1107 int (*cb
)(SSL
*ssl
, X509
**x509
, EVP_PKEY
**pkey
))
1109 ctx
->client_cert_cb
=cb
;
1112 int (*SSL_CTX_get_client_cert_cb(SSL_CTX
*ctx
))(SSL
* ssl
, X509
** x509
, EVP_PKEY
**pkey
)
1114 return ctx
->client_cert_cb
;
1117 #ifndef OPENSSL_NO_ENGINE
1118 int SSL_CTX_set_client_cert_engine(SSL_CTX
*ctx
, ENGINE
*e
)
1120 if (!ENGINE_init(e
))
1122 SSLerr(SSL_F_SSL_CTX_SET_CLIENT_CERT_ENGINE
, ERR_R_ENGINE_LIB
);
1125 if(!ENGINE_get_ssl_client_cert_function(e
))
1127 SSLerr(SSL_F_SSL_CTX_SET_CLIENT_CERT_ENGINE
, SSL_R_NO_CLIENT_CERT_METHOD
);
1131 ctx
->client_cert_engine
= e
;
1136 void SSL_CTX_set_cookie_generate_cb(SSL_CTX
*ctx
,
1137 int (*cb
)(SSL
*ssl
, unsigned char *cookie
, unsigned int *cookie_len
))
1139 ctx
->app_gen_cookie_cb
=cb
;
1142 void SSL_CTX_set_cookie_verify_cb(SSL_CTX
*ctx
,
1143 int (*cb
)(SSL
*ssl
, unsigned char *cookie
, unsigned int cookie_len
))
1145 ctx
->app_verify_cookie_cb
=cb
;
1148 IMPLEMENT_PEM_rw(SSL_SESSION
, SSL_SESSION
, PEM_STRING_SSL_SESSION
, SSL_SESSION
)