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)