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 /* Even with SSLv2, we have 16 bytes (128 bits) of session ID space. SSLv3/TLSv1
240 * has 32 bytes (256 bits). As such, filling the ID with random gunk 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 2^128 (or 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
== SSL2_VERSION
)
298 ss
->ssl_version
=SSL2_VERSION
;
299 ss
->session_id_length
=SSL2_SSL_SESSION_ID_LENGTH
;
301 else if (s
->version
== SSL3_VERSION
)
303 ss
->ssl_version
=SSL3_VERSION
;
304 ss
->session_id_length
=SSL3_SSL_SESSION_ID_LENGTH
;
306 else if (s
->version
== TLS1_VERSION
)
308 ss
->ssl_version
=TLS1_VERSION
;
309 ss
->session_id_length
=SSL3_SSL_SESSION_ID_LENGTH
;
311 else if (s
->version
== TLS1_1_VERSION
)
313 ss
->ssl_version
=TLS1_1_VERSION
;
314 ss
->session_id_length
=SSL3_SSL_SESSION_ID_LENGTH
;
316 else if (s
->version
== TLS1_2_VERSION
)
318 ss
->ssl_version
=TLS1_2_VERSION
;
319 ss
->session_id_length
=SSL3_SSL_SESSION_ID_LENGTH
;
321 else if (s
->version
== DTLS1_BAD_VER
)
323 ss
->ssl_version
=DTLS1_BAD_VER
;
324 ss
->session_id_length
=SSL3_SSL_SESSION_ID_LENGTH
;
326 else if (s
->version
== DTLS1_VERSION
)
328 ss
->ssl_version
=DTLS1_VERSION
;
329 ss
->session_id_length
=SSL3_SSL_SESSION_ID_LENGTH
;
331 else if (s
->version
== DTLS1_2_VERSION
)
333 ss
->ssl_version
=DTLS1_2_VERSION
;
334 ss
->session_id_length
=SSL3_SSL_SESSION_ID_LENGTH
;
338 SSLerr(SSL_F_SSL_GET_NEW_SESSION
,SSL_R_UNSUPPORTED_SSL_VERSION
);
339 SSL_SESSION_free(ss
);
342 #ifndef OPENSSL_NO_TLSEXT
344 * If RFC5077 ticket, use empty session ID (as server).
346 * (a) ssl_get_prev_session() does lookahead into the
347 * ClientHello extensions to find the session ticket.
348 * When ssl_get_prev_session() fails, s3_srvr.c calls
349 * ssl_get_new_session() in ssl3_get_client_hello().
350 * At that point, it has not yet parsed the extensions,
351 * however, because of the lookahead, it already knows
352 * whether a ticket is expected or not.
354 * (b) s3_clnt.c calls ssl_get_new_session() before parsing
355 * ServerHello extensions, and before recording the session
356 * ID received from the server, so this block is a noop.
358 if (s
->tlsext_ticket_expected
)
360 ss
->session_id_length
= 0;
364 /* Choose which callback will set the session ID */
365 CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX
);
366 if(s
->generate_session_id
)
367 cb
= s
->generate_session_id
;
368 else if(s
->session_ctx
->generate_session_id
)
369 cb
= s
->session_ctx
->generate_session_id
;
370 CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX
);
371 /* Choose a session ID */
372 tmp
= ss
->session_id_length
;
373 if(!cb(s
, ss
->session_id
, &tmp
))
375 /* The callback failed */
376 SSLerr(SSL_F_SSL_GET_NEW_SESSION
,
377 SSL_R_SSL_SESSION_ID_CALLBACK_FAILED
);
378 SSL_SESSION_free(ss
);
381 /* Don't allow the callback to set the session length to zero.
382 * nor set it higher than it was. */
383 if(!tmp
|| (tmp
> ss
->session_id_length
))
385 /* The callback set an illegal length */
386 SSLerr(SSL_F_SSL_GET_NEW_SESSION
,
387 SSL_R_SSL_SESSION_ID_HAS_BAD_LENGTH
);
388 SSL_SESSION_free(ss
);
391 /* If the session length was shrunk and we're SSLv2, pad it */
392 if((tmp
< ss
->session_id_length
) && (s
->version
== SSL2_VERSION
))
393 memset(ss
->session_id
+ tmp
, 0, ss
->session_id_length
- tmp
);
395 ss
->session_id_length
= tmp
;
396 /* Finally, check for a conflict */
397 if(SSL_has_matching_session_id(s
, ss
->session_id
,
398 ss
->session_id_length
))
400 SSLerr(SSL_F_SSL_GET_NEW_SESSION
,
401 SSL_R_SSL_SESSION_ID_CONFLICT
);
402 SSL_SESSION_free(ss
);
405 #ifndef OPENSSL_NO_TLSEXT
407 if (s
->tlsext_hostname
) {
408 ss
->tlsext_hostname
= BUF_strdup(s
->tlsext_hostname
);
409 if (ss
->tlsext_hostname
== NULL
) {
410 SSLerr(SSL_F_SSL_GET_NEW_SESSION
, ERR_R_INTERNAL_ERROR
);
411 SSL_SESSION_free(ss
);
419 ss
->session_id_length
=0;
422 if (s
->sid_ctx_length
> sizeof ss
->sid_ctx
)
424 SSLerr(SSL_F_SSL_GET_NEW_SESSION
, ERR_R_INTERNAL_ERROR
);
425 SSL_SESSION_free(ss
);
428 memcpy(ss
->sid_ctx
,s
->sid_ctx
,s
->sid_ctx_length
);
429 ss
->sid_ctx_length
=s
->sid_ctx_length
;
431 ss
->ssl_version
=s
->version
;
432 ss
->verify_result
= X509_V_OK
;
437 /* ssl_get_prev attempts to find an SSL_SESSION to be used to resume this
438 * connection. It is only called by servers.
440 * session_id: points at the session ID in the ClientHello. This code will
441 * read past the end of this in order to parse out the session ticket
443 * len: the length of the session ID.
444 * limit: a pointer to the first byte after the ClientHello.
448 * 0: a session may have been found.
451 * - If a session is found then s->session is pointed at it (after freeing an
452 * existing session if need be) and s->verify_result is set from the session.
453 * - Both for new and resumed sessions, s->tlsext_ticket_expected is set to 1
454 * if the server should issue a new session ticket (to 0 otherwise).
456 int ssl_get_prev_session(SSL
*s
, unsigned char *session_id
, int len
,
457 const unsigned char *limit
)
459 /* This is used only by servers. */
461 SSL_SESSION
*ret
=NULL
;
463 int try_session_cache
= 1;
464 #ifndef OPENSSL_NO_TLSEXT
468 if (len
> SSL_MAX_SSL_SESSION_ID_LENGTH
)
472 try_session_cache
= 0;
474 #ifndef OPENSSL_NO_TLSEXT
475 r
= tls1_process_ticket(s
, session_id
, len
, limit
, &ret
); /* sets s->tlsext_ticket_expected */
478 case -1: /* Error during processing */
481 case 0: /* No ticket found */
482 case 1: /* Zero length ticket found */
483 break; /* Ok to carry on processing session id. */
484 case 2: /* Ticket found but not decrypted. */
485 case 3: /* Ticket decrypted, *ret has been set. */
486 try_session_cache
= 0;
493 if (try_session_cache
&&
495 !(s
->session_ctx
->session_cache_mode
& SSL_SESS_CACHE_NO_INTERNAL_LOOKUP
))
498 data
.ssl_version
=s
->version
;
499 data
.session_id_length
=len
;
502 memcpy(data
.session_id
,session_id
,len
);
503 CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX
);
504 ret
=lh_SSL_SESSION_retrieve(s
->session_ctx
->sessions
,&data
);
507 /* don't allow other threads to steal it: */
508 CRYPTO_add(&ret
->references
,1,CRYPTO_LOCK_SSL_SESSION
);
510 CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX
);
512 s
->session_ctx
->stats
.sess_miss
++;
515 if (try_session_cache
&&
517 s
->session_ctx
->get_session_cb
!= NULL
)
521 if ((ret
=s
->session_ctx
->get_session_cb(s
,session_id
,len
,©
)))
523 s
->session_ctx
->stats
.sess_cb_hit
++;
525 /* Increment reference count now if the session callback
526 * asks us to do so (note that if the session structures
527 * returned by the callback are shared between threads,
528 * it must handle the reference count itself [i.e. copy == 0],
529 * or things won't be thread-safe). */
531 CRYPTO_add(&ret
->references
,1,CRYPTO_LOCK_SSL_SESSION
);
533 /* Add the externally cached session to the internal
534 * cache as well if and only if we are supposed to. */
535 if(!(s
->session_ctx
->session_cache_mode
& SSL_SESS_CACHE_NO_INTERNAL_STORE
))
536 /* The following should not return 1, otherwise,
537 * things are very strange */
538 SSL_CTX_add_session(s
->session_ctx
,ret
);
545 /* Now ret is non-NULL and we own one of its reference counts. */
547 if (ret
->sid_ctx_length
!= s
->sid_ctx_length
548 || memcmp(ret
->sid_ctx
,s
->sid_ctx
,ret
->sid_ctx_length
))
550 /* We have the session requested by the client, but we don't
551 * want to use it in this context. */
552 goto err
; /* treat like cache miss */
555 if((s
->verify_mode
& SSL_VERIFY_PEER
) && s
->sid_ctx_length
== 0)
557 /* We can't be sure if this session is being used out of
558 * context, which is especially important for SSL_VERIFY_PEER.
559 * The application should have used SSL[_CTX]_set_session_id_context.
561 * For this error case, we generate an error instead of treating
562 * the event like a cache miss (otherwise it would be easy for
563 * applications to effectively disable the session cache by
564 * accident without anyone noticing).
567 SSLerr(SSL_F_SSL_GET_PREV_SESSION
,SSL_R_SESSION_ID_CONTEXT_UNINITIALIZED
);
572 if (ret
->cipher
== NULL
)
574 unsigned char buf
[5],*p
;
580 if ((ret
->ssl_version
>>8) >= SSL3_VERSION_MAJOR
)
581 ret
->cipher
=ssl_get_cipher_by_char(s
,&(buf
[2]));
583 ret
->cipher
=ssl_get_cipher_by_char(s
,&(buf
[1]));
584 if (ret
->cipher
== NULL
)
588 if (ret
->timeout
< (long)(time(NULL
) - ret
->time
)) /* timeout */
590 s
->session_ctx
->stats
.sess_timeout
++;
591 if (try_session_cache
)
593 /* session was from the cache, so remove it */
594 SSL_CTX_remove_session(s
->session_ctx
,ret
);
599 s
->session_ctx
->stats
.sess_hit
++;
601 if (s
->session
!= NULL
)
602 SSL_SESSION_free(s
->session
);
604 s
->verify_result
= s
->session
->verify_result
;
610 SSL_SESSION_free(ret
);
611 #ifndef OPENSSL_NO_TLSEXT
612 if (!try_session_cache
)
614 /* The session was from a ticket, so we should
615 * issue a ticket for the new session */
616 s
->tlsext_ticket_expected
= 1;
626 int SSL_CTX_add_session(SSL_CTX
*ctx
, SSL_SESSION
*c
)
631 /* add just 1 reference count for the SSL_CTX's session cache
632 * even though it has two ways of access: each session is in a
633 * doubly linked list and an lhash */
634 CRYPTO_add(&c
->references
,1,CRYPTO_LOCK_SSL_SESSION
);
635 /* if session c is in already in cache, we take back the increment later */
637 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX
);
638 s
=lh_SSL_SESSION_insert(ctx
->sessions
,c
);
640 /* s != NULL iff we already had a session with the given PID.
641 * In this case, s == c should hold (then we did not really modify
642 * ctx->sessions), or we're in trouble. */
643 if (s
!= NULL
&& s
!= c
)
645 /* We *are* in trouble ... */
646 SSL_SESSION_list_remove(ctx
,s
);
648 /* ... so pretend the other session did not exist in cache
649 * (we cannot handle two SSL_SESSION structures with identical
650 * session ID in the same cache, which could happen e.g. when
651 * two threads concurrently obtain the same session from an external
656 /* Put at the head of the queue unless it is already in the cache */
658 SSL_SESSION_list_add(ctx
,c
);
662 /* existing cache entry -- decrement previously incremented reference
663 * count because it already takes into account the cache */
665 SSL_SESSION_free(s
); /* s == c */
670 /* new cache entry -- remove old ones if cache has become too large */
674 if (SSL_CTX_sess_get_cache_size(ctx
) > 0)
676 while (SSL_CTX_sess_number(ctx
) >
677 SSL_CTX_sess_get_cache_size(ctx
))
679 if (!remove_session_lock(ctx
,
680 ctx
->session_cache_tail
, 0))
683 ctx
->stats
.sess_cache_full
++;
687 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX
);
691 int SSL_CTX_remove_session(SSL_CTX
*ctx
, SSL_SESSION
*c
)
693 return remove_session_lock(ctx
, c
, 1);
696 static int remove_session_lock(SSL_CTX
*ctx
, SSL_SESSION
*c
, int lck
)
701 if ((c
!= NULL
) && (c
->session_id_length
!= 0))
703 if(lck
) CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX
);
704 if ((r
= lh_SSL_SESSION_retrieve(ctx
->sessions
,c
)) == c
)
707 r
=lh_SSL_SESSION_delete(ctx
->sessions
,c
);
708 SSL_SESSION_list_remove(ctx
,c
);
711 if(lck
) CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX
);
716 if (ctx
->remove_session_cb
!= NULL
)
717 ctx
->remove_session_cb(ctx
,r
);
726 void SSL_SESSION_free(SSL_SESSION
*ss
)
733 i
=CRYPTO_add(&ss
->references
,-1,CRYPTO_LOCK_SSL_SESSION
);
735 REF_PRINT("SSL_SESSION",ss
);
741 fprintf(stderr
,"SSL_SESSION_free, bad reference count\n");
746 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_SESSION
, ss
, &ss
->ex_data
);
748 OPENSSL_cleanse(ss
->key_arg
,sizeof ss
->key_arg
);
749 OPENSSL_cleanse(ss
->master_key
,sizeof ss
->master_key
);
750 OPENSSL_cleanse(ss
->session_id
,sizeof ss
->session_id
);
751 if (ss
->sess_cert
!= NULL
) ssl_sess_cert_free(ss
->sess_cert
);
752 if (ss
->peer
!= NULL
) X509_free(ss
->peer
);
753 if (ss
->ciphers
!= NULL
) sk_SSL_CIPHER_free(ss
->ciphers
);
754 #ifndef OPENSSL_NO_TLSEXT
755 if (ss
->tlsext_hostname
!= NULL
) OPENSSL_free(ss
->tlsext_hostname
);
756 if (ss
->tlsext_tick
!= NULL
) OPENSSL_free(ss
->tlsext_tick
);
757 #ifndef OPENSSL_NO_EC
758 ss
->tlsext_ecpointformatlist_length
= 0;
759 if (ss
->tlsext_ecpointformatlist
!= NULL
) OPENSSL_free(ss
->tlsext_ecpointformatlist
);
760 ss
->tlsext_ellipticcurvelist_length
= 0;
761 if (ss
->tlsext_ellipticcurvelist
!= NULL
) OPENSSL_free(ss
->tlsext_ellipticcurvelist
);
762 #endif /* OPENSSL_NO_EC */
764 #ifndef OPENSSL_NO_PSK
765 if (ss
->psk_identity_hint
!= NULL
)
766 OPENSSL_free(ss
->psk_identity_hint
);
767 if (ss
->psk_identity
!= NULL
)
768 OPENSSL_free(ss
->psk_identity
);
770 #ifndef OPENSSL_NO_SRP
771 if (ss
->srp_username
!= NULL
)
772 OPENSSL_free(ss
->srp_username
);
774 OPENSSL_cleanse(ss
,sizeof(*ss
));
778 int SSL_set_session(SSL
*s
, SSL_SESSION
*session
)
781 const SSL_METHOD
*meth
;
785 meth
=s
->ctx
->method
->get_ssl_method(session
->ssl_version
);
787 meth
=s
->method
->get_ssl_method(session
->ssl_version
);
790 SSLerr(SSL_F_SSL_SET_SESSION
,SSL_R_UNABLE_TO_FIND_SSL_METHOD
);
794 if (meth
!= s
->method
)
796 if (!SSL_set_ssl_method(s
,meth
))
800 #ifndef OPENSSL_NO_KRB5
801 if (s
->kssl_ctx
&& !s
->kssl_ctx
->client_princ
&&
802 session
->krb5_client_princ_len
> 0)
804 s
->kssl_ctx
->client_princ
= (char *)OPENSSL_malloc(session
->krb5_client_princ_len
+ 1);
805 memcpy(s
->kssl_ctx
->client_princ
,session
->krb5_client_princ
,
806 session
->krb5_client_princ_len
);
807 s
->kssl_ctx
->client_princ
[session
->krb5_client_princ_len
] = '\0';
809 #endif /* OPENSSL_NO_KRB5 */
811 /* CRYPTO_w_lock(CRYPTO_LOCK_SSL);*/
812 CRYPTO_add(&session
->references
,1,CRYPTO_LOCK_SSL_SESSION
);
813 if (s
->session
!= NULL
)
814 SSL_SESSION_free(s
->session
);
816 s
->verify_result
= s
->session
->verify_result
;
817 /* CRYPTO_w_unlock(CRYPTO_LOCK_SSL);*/
822 if (s
->session
!= NULL
)
824 SSL_SESSION_free(s
->session
);
829 if (meth
!= s
->method
)
831 if (!SSL_set_ssl_method(s
,meth
))
839 long SSL_SESSION_set_timeout(SSL_SESSION
*s
, long t
)
841 if (s
== NULL
) return(0);
846 long SSL_SESSION_get_timeout(const SSL_SESSION
*s
)
848 if (s
== NULL
) return(0);
852 long SSL_SESSION_get_time(const SSL_SESSION
*s
)
854 if (s
== NULL
) return(0);
858 long SSL_SESSION_set_time(SSL_SESSION
*s
, long t
)
860 if (s
== NULL
) return(0);
865 X509
*SSL_SESSION_get0_peer(SSL_SESSION
*s
)
870 int SSL_SESSION_set1_id_context(SSL_SESSION
*s
,const unsigned char *sid_ctx
,
871 unsigned int sid_ctx_len
)
873 if(sid_ctx_len
> SSL_MAX_SID_CTX_LENGTH
)
875 SSLerr(SSL_F_SSL_SESSION_SET1_ID_CONTEXT
,SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG
);
878 s
->sid_ctx_length
=sid_ctx_len
;
879 memcpy(s
->sid_ctx
,sid_ctx
,sid_ctx_len
);
884 long SSL_CTX_set_timeout(SSL_CTX
*s
, long t
)
887 if (s
== NULL
) return(0);
888 l
=s
->session_timeout
;
889 s
->session_timeout
=t
;
893 long SSL_CTX_get_timeout(const SSL_CTX
*s
)
895 if (s
== NULL
) return(0);
896 return(s
->session_timeout
);
899 #ifndef OPENSSL_NO_TLSEXT
900 int SSL_set_session_secret_cb(SSL
*s
, int (*tls_session_secret_cb
)(SSL
*s
, void *secret
, int *secret_len
,
901 STACK_OF(SSL_CIPHER
) *peer_ciphers
, SSL_CIPHER
**cipher
, void *arg
), void *arg
)
903 if (s
== NULL
) return(0);
904 s
->tls_session_secret_cb
= tls_session_secret_cb
;
905 s
->tls_session_secret_cb_arg
= arg
;
909 int SSL_set_session_ticket_ext_cb(SSL
*s
, tls_session_ticket_ext_cb_fn cb
,
912 if (s
== NULL
) return(0);
913 s
->tls_session_ticket_ext_cb
= cb
;
914 s
->tls_session_ticket_ext_cb_arg
= arg
;
918 int SSL_set_session_ticket_ext(SSL
*s
, void *ext_data
, int ext_len
)
920 if (s
->version
>= TLS1_VERSION
)
922 if (s
->tlsext_session_ticket
)
924 OPENSSL_free(s
->tlsext_session_ticket
);
925 s
->tlsext_session_ticket
= NULL
;
928 s
->tlsext_session_ticket
= OPENSSL_malloc(sizeof(TLS_SESSION_TICKET_EXT
) + ext_len
);
929 if (!s
->tlsext_session_ticket
)
931 SSLerr(SSL_F_SSL_SET_SESSION_TICKET_EXT
, ERR_R_MALLOC_FAILURE
);
937 s
->tlsext_session_ticket
->length
= ext_len
;
938 s
->tlsext_session_ticket
->data
= s
->tlsext_session_ticket
+ 1;
939 memcpy(s
->tlsext_session_ticket
->data
, ext_data
, ext_len
);
943 s
->tlsext_session_ticket
->length
= 0;
944 s
->tlsext_session_ticket
->data
= NULL
;
952 #endif /* OPENSSL_NO_TLSEXT */
954 typedef struct timeout_param_st
958 LHASH_OF(SSL_SESSION
) *cache
;
961 static void timeout_doall_arg(SSL_SESSION
*s
, TIMEOUT_PARAM
*p
)
963 if ((p
->time
== 0) || (p
->time
> (s
->time
+s
->timeout
))) /* timeout */
965 /* The reason we don't call SSL_CTX_remove_session() is to
966 * save on locking overhead */
967 (void)lh_SSL_SESSION_delete(p
->cache
,s
);
968 SSL_SESSION_list_remove(p
->ctx
,s
);
970 if (p
->ctx
->remove_session_cb
!= NULL
)
971 p
->ctx
->remove_session_cb(p
->ctx
,s
);
976 static IMPLEMENT_LHASH_DOALL_ARG_FN(timeout
, SSL_SESSION
, TIMEOUT_PARAM
)
978 void SSL_CTX_flush_sessions(SSL_CTX
*s
, long t
)
984 tp
.cache
=s
->sessions
;
985 if (tp
.cache
== NULL
) return;
987 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX
);
988 i
=CHECKED_LHASH_OF(SSL_SESSION
, tp
.cache
)->down_load
;
989 CHECKED_LHASH_OF(SSL_SESSION
, tp
.cache
)->down_load
=0;
990 lh_SSL_SESSION_doall_arg(tp
.cache
, LHASH_DOALL_ARG_FN(timeout
),
992 CHECKED_LHASH_OF(SSL_SESSION
, tp
.cache
)->down_load
=i
;
993 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX
);
996 int ssl_clear_bad_session(SSL
*s
)
998 if ( (s
->session
!= NULL
) &&
999 !(s
->shutdown
& SSL_SENT_SHUTDOWN
) &&
1000 !(SSL_in_init(s
) || SSL_in_before(s
)))
1002 SSL_CTX_remove_session(s
->ctx
,s
->session
);
1009 /* locked by SSL_CTX in the calling function */
1010 static void SSL_SESSION_list_remove(SSL_CTX
*ctx
, SSL_SESSION
*s
)
1012 if ((s
->next
== NULL
) || (s
->prev
== NULL
)) return;
1014 if (s
->next
== (SSL_SESSION
*)&(ctx
->session_cache_tail
))
1015 { /* last element in list */
1016 if (s
->prev
== (SSL_SESSION
*)&(ctx
->session_cache_head
))
1017 { /* only one element in list */
1018 ctx
->session_cache_head
=NULL
;
1019 ctx
->session_cache_tail
=NULL
;
1023 ctx
->session_cache_tail
=s
->prev
;
1024 s
->prev
->next
=(SSL_SESSION
*)&(ctx
->session_cache_tail
);
1029 if (s
->prev
== (SSL_SESSION
*)&(ctx
->session_cache_head
))
1030 { /* first element in list */
1031 ctx
->session_cache_head
=s
->next
;
1032 s
->next
->prev
=(SSL_SESSION
*)&(ctx
->session_cache_head
);
1035 { /* middle of list */
1036 s
->next
->prev
=s
->prev
;
1037 s
->prev
->next
=s
->next
;
1040 s
->prev
=s
->next
=NULL
;
1043 static void SSL_SESSION_list_add(SSL_CTX
*ctx
, SSL_SESSION
*s
)
1045 if ((s
->next
!= NULL
) && (s
->prev
!= NULL
))
1046 SSL_SESSION_list_remove(ctx
,s
);
1048 if (ctx
->session_cache_head
== NULL
)
1050 ctx
->session_cache_head
=s
;
1051 ctx
->session_cache_tail
=s
;
1052 s
->prev
=(SSL_SESSION
*)&(ctx
->session_cache_head
);
1053 s
->next
=(SSL_SESSION
*)&(ctx
->session_cache_tail
);
1057 s
->next
=ctx
->session_cache_head
;
1059 s
->prev
=(SSL_SESSION
*)&(ctx
->session_cache_head
);
1060 ctx
->session_cache_head
=s
;
1064 void SSL_CTX_sess_set_new_cb(SSL_CTX
*ctx
,
1065 int (*cb
)(struct ssl_st
*ssl
,SSL_SESSION
*sess
))
1067 ctx
->new_session_cb
=cb
;
1070 int (*SSL_CTX_sess_get_new_cb(SSL_CTX
*ctx
))(SSL
*ssl
, SSL_SESSION
*sess
)
1072 return ctx
->new_session_cb
;
1075 void SSL_CTX_sess_set_remove_cb(SSL_CTX
*ctx
,
1076 void (*cb
)(SSL_CTX
*ctx
,SSL_SESSION
*sess
))
1078 ctx
->remove_session_cb
=cb
;
1081 void (*SSL_CTX_sess_get_remove_cb(SSL_CTX
*ctx
))(SSL_CTX
* ctx
,SSL_SESSION
*sess
)
1083 return ctx
->remove_session_cb
;
1086 void SSL_CTX_sess_set_get_cb(SSL_CTX
*ctx
,
1087 SSL_SESSION
*(*cb
)(struct ssl_st
*ssl
,
1088 unsigned char *data
,int len
,int *copy
))
1090 ctx
->get_session_cb
=cb
;
1093 SSL_SESSION
* (*SSL_CTX_sess_get_get_cb(SSL_CTX
*ctx
))(SSL
*ssl
,
1094 unsigned char *data
,int len
,int *copy
)
1096 return ctx
->get_session_cb
;
1099 void SSL_CTX_set_info_callback(SSL_CTX
*ctx
,
1100 void (*cb
)(const SSL
*ssl
,int type
,int val
))
1102 ctx
->info_callback
=cb
;
1105 void (*SSL_CTX_get_info_callback(SSL_CTX
*ctx
))(const SSL
*ssl
,int type
,int val
)
1107 return ctx
->info_callback
;
1110 void SSL_CTX_set_client_cert_cb(SSL_CTX
*ctx
,
1111 int (*cb
)(SSL
*ssl
, X509
**x509
, EVP_PKEY
**pkey
))
1113 ctx
->client_cert_cb
=cb
;
1116 int (*SSL_CTX_get_client_cert_cb(SSL_CTX
*ctx
))(SSL
* ssl
, X509
** x509
, EVP_PKEY
**pkey
)
1118 return ctx
->client_cert_cb
;
1121 #ifndef OPENSSL_NO_ENGINE
1122 int SSL_CTX_set_client_cert_engine(SSL_CTX
*ctx
, ENGINE
*e
)
1124 if (!ENGINE_init(e
))
1126 SSLerr(SSL_F_SSL_CTX_SET_CLIENT_CERT_ENGINE
, ERR_R_ENGINE_LIB
);
1129 if(!ENGINE_get_ssl_client_cert_function(e
))
1131 SSLerr(SSL_F_SSL_CTX_SET_CLIENT_CERT_ENGINE
, SSL_R_NO_CLIENT_CERT_METHOD
);
1135 ctx
->client_cert_engine
= e
;
1140 void SSL_CTX_set_cookie_generate_cb(SSL_CTX
*ctx
,
1141 int (*cb
)(SSL
*ssl
, unsigned char *cookie
, unsigned int *cookie_len
))
1143 ctx
->app_gen_cookie_cb
=cb
;
1146 void SSL_CTX_set_cookie_verify_cb(SSL_CTX
*ctx
,
1147 int (*cb
)(SSL
*ssl
, unsigned char *cookie
, unsigned int cookie_len
))
1149 ctx
->app_verify_cookie_cb
=cb
;
1152 IMPLEMENT_PEM_rw(SSL_SESSION
, SSL_SESSION
, PEM_STRING_SSL_SESSION
, SSL_SESSION
)