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 #include "ssl_locl.h"
143 static void SSL_SESSION_list_remove(SSL_CTX *ctx, SSL_SESSION *s);
144 static void SSL_SESSION_list_add(SSL_CTX *ctx,SSL_SESSION *s);
145 static int remove_session_lock(SSL_CTX *ctx, SSL_SESSION *c, int lck);
147 SSL_SESSION *SSL_get_session(const SSL *ssl)
148 /* aka SSL_get0_session; gets 0 objects, just returns a copy of the pointer */
150 return(ssl->session);
153 SSL_SESSION *SSL_get1_session(SSL *ssl)
154 /* variant of SSL_get_session: caller really gets something */
157 /* Need to lock this all up rather than just use CRYPTO_add so that
158 * somebody doesn't free ssl->session between when we check it's
159 * non-null and when we up the reference count. */
160 CRYPTO_w_lock(CRYPTO_LOCK_SSL_SESSION);
164 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_SESSION);
168 int SSL_SESSION_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
169 CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func)
171 return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL_SESSION, argl, argp,
172 new_func, dup_func, free_func);
175 int SSL_SESSION_set_ex_data(SSL_SESSION *s, int idx, void *arg)
177 return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
180 void *SSL_SESSION_get_ex_data(const SSL_SESSION *s, int idx)
182 return(CRYPTO_get_ex_data(&s->ex_data,idx));
185 SSL_SESSION *SSL_SESSION_new(void)
189 ss=(SSL_SESSION *)OPENSSL_malloc(sizeof(SSL_SESSION));
192 SSLerr(SSL_F_SSL_SESSION_NEW,ERR_R_MALLOC_FAILURE);
195 memset(ss,0,sizeof(SSL_SESSION));
197 ss->verify_result = 1; /* avoid 0 (= X509_V_OK) just in case */
199 ss->timeout=60*5+4; /* 5 minute timeout by default */
200 ss->time=(unsigned long)time(NULL);
204 #ifndef OPENSSL_NO_TLSEXT
205 ss->tlsext_hostname = NULL;
207 CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_SESSION, ss, &ss->ex_data);
208 #ifndef OPENSSL_NO_PSK
209 ss->psk_identity_hint=NULL;
210 ss->psk_identity=NULL;
215 const unsigned char *SSL_SESSION_get_id(const SSL_SESSION *s, unsigned int *len)
218 *len = s->session_id_length;
219 return s->session_id;
222 /* Even with SSLv2, we have 16 bytes (128 bits) of session ID space. SSLv3/TLSv1
223 * has 32 bytes (256 bits). As such, filling the ID with random gunk repeatedly
224 * until we have no conflict is going to complete in one iteration pretty much
225 * "most" of the time (btw: understatement). So, if it takes us 10 iterations
226 * and we still can't avoid a conflict - well that's a reasonable point to call
227 * it quits. Either the RAND code is broken or someone is trying to open roughly
228 * very close to 2^128 (or 2^256) SSL sessions to our server. How you might
229 * store that many sessions is perhaps a more interesting question ... */
231 #define MAX_SESS_ID_ATTEMPTS 10
232 static int def_generate_session_id(const SSL *ssl, unsigned char *id,
233 unsigned int *id_len)
235 unsigned int retry = 0;
237 if (RAND_pseudo_bytes(id, *id_len) <= 0)
239 while(SSL_has_matching_session_id(ssl, id, *id_len) &&
240 (++retry < MAX_SESS_ID_ATTEMPTS));
241 if(retry < MAX_SESS_ID_ATTEMPTS)
243 /* else - woops a session_id match */
244 /* XXX We should also check the external cache --
245 * but the probability of a collision is negligible, and
246 * we could not prevent the concurrent creation of sessions
247 * with identical IDs since we currently don't have means
248 * to atomically check whether a session ID already exists
249 * and make a reservation for it if it does not
250 * (this problem applies to the internal cache as well).
255 int ssl_get_new_session(SSL *s, int session)
257 /* This gets used by clients and servers. */
260 SSL_SESSION *ss=NULL;
261 GEN_SESSION_CB cb = def_generate_session_id;
263 if ((ss=SSL_SESSION_new()) == NULL) return(0);
265 /* If the context has a default timeout, use it */
266 if (s->session_ctx->session_timeout == 0)
267 ss->timeout=SSL_get_default_timeout(s);
269 ss->timeout=s->session_ctx->session_timeout;
271 if (s->session != NULL)
273 SSL_SESSION_free(s->session);
279 if (s->version == SSL2_VERSION)
281 ss->ssl_version=SSL2_VERSION;
282 ss->session_id_length=SSL2_SSL_SESSION_ID_LENGTH;
284 else if (s->version == SSL3_VERSION)
286 ss->ssl_version=SSL3_VERSION;
287 ss->session_id_length=SSL3_SSL_SESSION_ID_LENGTH;
289 else if (s->version == TLS1_VERSION)
291 ss->ssl_version=TLS1_VERSION;
292 ss->session_id_length=SSL3_SSL_SESSION_ID_LENGTH;
294 else if (s->version == DTLS1_VERSION)
296 ss->ssl_version=DTLS1_VERSION;
297 ss->session_id_length=SSL3_SSL_SESSION_ID_LENGTH;
301 SSLerr(SSL_F_SSL_GET_NEW_SESSION,SSL_R_UNSUPPORTED_SSL_VERSION);
302 SSL_SESSION_free(ss);
305 /* Choose which callback will set the session ID */
306 CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);
307 if(s->generate_session_id)
308 cb = s->generate_session_id;
309 else if(s->session_ctx->generate_session_id)
310 cb = s->session_ctx->generate_session_id;
311 CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
312 /* Choose a session ID */
313 tmp = ss->session_id_length;
314 if(!cb(s, ss->session_id, &tmp))
316 /* The callback failed */
317 SSLerr(SSL_F_SSL_GET_NEW_SESSION,
318 SSL_R_SSL_SESSION_ID_CALLBACK_FAILED);
319 SSL_SESSION_free(ss);
322 /* Don't allow the callback to set the session length to zero.
323 * nor set it higher than it was. */
324 if(!tmp || (tmp > ss->session_id_length))
326 /* The callback set an illegal length */
327 SSLerr(SSL_F_SSL_GET_NEW_SESSION,
328 SSL_R_SSL_SESSION_ID_HAS_BAD_LENGTH);
329 SSL_SESSION_free(ss);
332 /* If the session length was shrunk and we're SSLv2, pad it */
333 if((tmp < ss->session_id_length) && (s->version == SSL2_VERSION))
334 memset(ss->session_id + tmp, 0, ss->session_id_length - tmp);
336 ss->session_id_length = tmp;
337 /* Finally, check for a conflict */
338 if(SSL_has_matching_session_id(s, ss->session_id,
339 ss->session_id_length))
341 SSLerr(SSL_F_SSL_GET_NEW_SESSION,
342 SSL_R_SSL_SESSION_ID_CONFLICT);
343 SSL_SESSION_free(ss);
346 #ifndef OPENSSL_NO_TLSEXT
347 if (s->tlsext_hostname) {
348 ss->tlsext_hostname = BUF_strdup(s->tlsext_hostname);
349 if (ss->tlsext_hostname == NULL) {
350 SSLerr(SSL_F_SSL_GET_NEW_SESSION, ERR_R_INTERNAL_ERROR);
351 SSL_SESSION_free(ss);
359 ss->session_id_length=0;
362 if (s->sid_ctx_length > sizeof ss->sid_ctx)
364 SSLerr(SSL_F_SSL_GET_NEW_SESSION, ERR_R_INTERNAL_ERROR);
365 SSL_SESSION_free(ss);
368 memcpy(ss->sid_ctx,s->sid_ctx,s->sid_ctx_length);
369 ss->sid_ctx_length=s->sid_ctx_length;
371 ss->ssl_version=s->version;
372 ss->verify_result = X509_V_OK;
377 int ssl_get_prev_session(SSL *s, unsigned char *session_id, int len)
379 /* This is used only by servers. */
381 SSL_SESSION *ret=NULL,data;
384 data.ssl_version=s->version;
385 data.session_id_length=len;
386 if (len > SSL_MAX_SSL_SESSION_ID_LENGTH)
388 memcpy(data.session_id,session_id,len);
390 if (!(s->session_ctx->session_cache_mode & SSL_SESS_CACHE_NO_INTERNAL_LOOKUP))
392 CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);
393 ret=(SSL_SESSION *)lh_retrieve(s->session_ctx->sessions,&data);
395 /* don't allow other threads to steal it: */
396 CRYPTO_add(&ret->references,1,CRYPTO_LOCK_SSL_SESSION);
397 CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
404 s->session_ctx->stats.sess_miss++;
406 if (s->session_ctx->get_session_cb != NULL
407 && (ret=s->session_ctx->get_session_cb(s,session_id,len,©))
410 s->session_ctx->stats.sess_cb_hit++;
412 /* Increment reference count now if the session callback
413 * asks us to do so (note that if the session structures
414 * returned by the callback are shared between threads,
415 * it must handle the reference count itself [i.e. copy == 0],
416 * or things won't be thread-safe). */
418 CRYPTO_add(&ret->references,1,CRYPTO_LOCK_SSL_SESSION);
420 /* Add the externally cached session to the internal
421 * cache as well if and only if we are supposed to. */
422 if(!(s->session_ctx->session_cache_mode & SSL_SESS_CACHE_NO_INTERNAL_STORE))
423 /* The following should not return 1, otherwise,
424 * things are very strange */
425 SSL_CTX_add_session(s->session_ctx,ret);
431 /* Now ret is non-NULL, and we own one of its reference counts. */
433 if((s->verify_mode&SSL_VERIFY_PEER)
434 && (!s->sid_ctx_length || ret->sid_ctx_length != s->sid_ctx_length
435 || memcmp(ret->sid_ctx,s->sid_ctx,ret->sid_ctx_length)))
437 /* We've found the session named by the client, but we don't
438 * want to use it in this context. */
440 if (s->sid_ctx_length == 0)
442 /* application should have used SSL[_CTX]_set_session_id_context
443 * -- we could tolerate this and just pretend we never heard
444 * of this session, but then applications could effectively
445 * disable the session cache by accident without anyone noticing */
447 SSLerr(SSL_F_SSL_GET_PREV_SESSION,SSL_R_SESSION_ID_CONTEXT_UNINITIALIZED);
453 #if 0 /* The client cannot always know when a session is not appropriate,
454 * so we shouldn't generate an error message. */
456 SSLerr(SSL_F_SSL_GET_PREV_SESSION,SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT);
458 goto err; /* treat like cache miss */
462 if (ret->cipher == NULL)
464 unsigned char buf[5],*p;
470 if ((ret->ssl_version>>8) == SSL3_VERSION_MAJOR)
471 ret->cipher=ssl_get_cipher_by_char(s,&(buf[2]));
473 ret->cipher=ssl_get_cipher_by_char(s,&(buf[1]));
474 if (ret->cipher == NULL)
479 #if 0 /* This is way too late. */
481 /* If a thread got the session, then 'swaped', and another got
482 * it and then due to a time-out decided to 'OPENSSL_free' it we could
483 * be in trouble. So I'll increment it now, then double decrement
484 * later - am I speaking rubbish?. */
485 CRYPTO_add(&ret->references,1,CRYPTO_LOCK_SSL_SESSION);
488 if (ret->timeout < (long)(time(NULL) - ret->time)) /* timeout */
490 s->session_ctx->stats.sess_timeout++;
491 /* remove it from the cache */
492 SSL_CTX_remove_session(s->session_ctx,ret);
496 s->session_ctx->stats.sess_hit++;
498 /* ret->time=time(NULL); */ /* rezero timeout? */
499 /* again, just leave the session
500 * if it is the same session, we have just incremented and
501 * then decremented the reference count :-) */
502 if (s->session != NULL)
503 SSL_SESSION_free(s->session);
505 s->verify_result = s->session->verify_result;
510 SSL_SESSION_free(ret);
517 int SSL_CTX_add_session(SSL_CTX *ctx, SSL_SESSION *c)
522 /* add just 1 reference count for the SSL_CTX's session cache
523 * even though it has two ways of access: each session is in a
524 * doubly linked list and an lhash */
525 CRYPTO_add(&c->references,1,CRYPTO_LOCK_SSL_SESSION);
526 /* if session c is in already in cache, we take back the increment later */
528 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
529 s=(SSL_SESSION *)lh_insert(ctx->sessions,c);
531 /* s != NULL iff we already had a session with the given PID.
532 * In this case, s == c should hold (then we did not really modify
533 * ctx->sessions), or we're in trouble. */
534 if (s != NULL && s != c)
536 /* We *are* in trouble ... */
537 SSL_SESSION_list_remove(ctx,s);
539 /* ... so pretend the other session did not exist in cache
540 * (we cannot handle two SSL_SESSION structures with identical
541 * session ID in the same cache, which could happen e.g. when
542 * two threads concurrently obtain the same session from an external
547 /* Put at the head of the queue unless it is already in the cache */
549 SSL_SESSION_list_add(ctx,c);
553 /* existing cache entry -- decrement previously incremented reference
554 * count because it already takes into account the cache */
556 SSL_SESSION_free(s); /* s == c */
561 /* new cache entry -- remove old ones if cache has become too large */
565 if (SSL_CTX_sess_get_cache_size(ctx) > 0)
567 while (SSL_CTX_sess_number(ctx) >
568 SSL_CTX_sess_get_cache_size(ctx))
570 if (!remove_session_lock(ctx,
571 ctx->session_cache_tail, 0))
574 ctx->stats.sess_cache_full++;
578 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
582 int SSL_CTX_remove_session(SSL_CTX *ctx, SSL_SESSION *c)
584 return remove_session_lock(ctx, c, 1);
587 static int remove_session_lock(SSL_CTX *ctx, SSL_SESSION *c, int lck)
592 if ((c != NULL) && (c->session_id_length != 0))
594 if(lck) CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
595 if ((r = (SSL_SESSION *)lh_retrieve(ctx->sessions,c)) == c)
598 r=(SSL_SESSION *)lh_delete(ctx->sessions,c);
599 SSL_SESSION_list_remove(ctx,c);
602 if(lck) CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
607 if (ctx->remove_session_cb != NULL)
608 ctx->remove_session_cb(ctx,r);
617 void SSL_SESSION_free(SSL_SESSION *ss)
624 i=CRYPTO_add(&ss->references,-1,CRYPTO_LOCK_SSL_SESSION);
626 REF_PRINT("SSL_SESSION",ss);
632 fprintf(stderr,"SSL_SESSION_free, bad reference count\n");
637 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_SESSION, ss, &ss->ex_data);
639 OPENSSL_cleanse(ss->key_arg,sizeof ss->key_arg);
640 OPENSSL_cleanse(ss->master_key,sizeof ss->master_key);
641 OPENSSL_cleanse(ss->session_id,sizeof ss->session_id);
642 if (ss->sess_cert != NULL) ssl_sess_cert_free(ss->sess_cert);
643 if (ss->peer != NULL) X509_free(ss->peer);
644 if (ss->ciphers != NULL) sk_SSL_CIPHER_free(ss->ciphers);
645 #ifndef OPENSSL_NO_TLSEXT
646 if (ss->tlsext_hostname != NULL) OPENSSL_free(ss->tlsext_hostname);
648 #ifndef OPENSSL_NO_PSK
649 if (ss->psk_identity_hint != NULL)
650 OPENSSL_free(ss->psk_identity_hint);
651 if (ss->psk_identity != NULL)
652 OPENSSL_free(ss->psk_identity);
654 OPENSSL_cleanse(ss,sizeof(*ss));
658 int SSL_set_session(SSL *s, SSL_SESSION *session)
661 const SSL_METHOD *meth;
665 meth=s->ctx->method->get_ssl_method(session->ssl_version);
667 meth=s->method->get_ssl_method(session->ssl_version);
670 SSLerr(SSL_F_SSL_SET_SESSION,SSL_R_UNABLE_TO_FIND_SSL_METHOD);
674 if (meth != s->method)
676 if (!SSL_set_ssl_method(s,meth))
678 if (s->ctx->session_timeout == 0)
679 session->timeout=SSL_get_default_timeout(s);
681 session->timeout=s->ctx->session_timeout;
684 #ifndef OPENSSL_NO_KRB5
685 if (s->kssl_ctx && !s->kssl_ctx->client_princ &&
686 session->krb5_client_princ_len > 0)
688 s->kssl_ctx->client_princ = (char *)malloc(session->krb5_client_princ_len + 1);
689 memcpy(s->kssl_ctx->client_princ,session->krb5_client_princ,
690 session->krb5_client_princ_len);
691 s->kssl_ctx->client_princ[session->krb5_client_princ_len] = '\0';
693 #endif /* OPENSSL_NO_KRB5 */
695 /* CRYPTO_w_lock(CRYPTO_LOCK_SSL);*/
696 CRYPTO_add(&session->references,1,CRYPTO_LOCK_SSL_SESSION);
697 if (s->session != NULL)
698 SSL_SESSION_free(s->session);
700 s->verify_result = s->session->verify_result;
701 /* CRYPTO_w_unlock(CRYPTO_LOCK_SSL);*/
706 if (s->session != NULL)
708 SSL_SESSION_free(s->session);
713 if (meth != s->method)
715 if (!SSL_set_ssl_method(s,meth))
723 long SSL_SESSION_set_timeout(SSL_SESSION *s, long t)
725 if (s == NULL) return(0);
730 long SSL_SESSION_get_timeout(const SSL_SESSION *s)
732 if (s == NULL) return(0);
736 long SSL_SESSION_get_time(const SSL_SESSION *s)
738 if (s == NULL) return(0);
742 long SSL_SESSION_set_time(SSL_SESSION *s, long t)
744 if (s == NULL) return(0);
749 long SSL_CTX_set_timeout(SSL_CTX *s, long t)
752 if (s == NULL) return(0);
753 l=s->session_timeout;
754 s->session_timeout=t;
758 long SSL_CTX_get_timeout(const SSL_CTX *s)
760 if (s == NULL) return(0);
761 return(s->session_timeout);
764 typedef struct timeout_param_st
771 static void timeout(SSL_SESSION *s, TIMEOUT_PARAM *p)
773 if ((p->time == 0) || (p->time > (s->time+s->timeout))) /* timeout */
775 /* The reason we don't call SSL_CTX_remove_session() is to
776 * save on locking overhead */
777 lh_delete(p->cache,s);
778 SSL_SESSION_list_remove(p->ctx,s);
780 if (p->ctx->remove_session_cb != NULL)
781 p->ctx->remove_session_cb(p->ctx,s);
786 static IMPLEMENT_LHASH_DOALL_ARG_FN(timeout, SSL_SESSION *, TIMEOUT_PARAM *)
788 void SSL_CTX_flush_sessions(SSL_CTX *s, long t)
794 tp.cache=s->sessions;
795 if (tp.cache == NULL) return;
797 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
798 i=tp.cache->down_load;
799 tp.cache->down_load=0;
800 lh_doall_arg(tp.cache, LHASH_DOALL_ARG_FN(timeout), &tp);
801 tp.cache->down_load=i;
802 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
805 int ssl_clear_bad_session(SSL *s)
807 if ( (s->session != NULL) &&
808 !(s->shutdown & SSL_SENT_SHUTDOWN) &&
809 !(SSL_in_init(s) || SSL_in_before(s)))
811 SSL_CTX_remove_session(s->ctx,s->session);
818 /* locked by SSL_CTX in the calling function */
819 static void SSL_SESSION_list_remove(SSL_CTX *ctx, SSL_SESSION *s)
821 if ((s->next == NULL) || (s->prev == NULL)) return;
823 if (s->next == (SSL_SESSION *)&(ctx->session_cache_tail))
824 { /* last element in list */
825 if (s->prev == (SSL_SESSION *)&(ctx->session_cache_head))
826 { /* only one element in list */
827 ctx->session_cache_head=NULL;
828 ctx->session_cache_tail=NULL;
832 ctx->session_cache_tail=s->prev;
833 s->prev->next=(SSL_SESSION *)&(ctx->session_cache_tail);
838 if (s->prev == (SSL_SESSION *)&(ctx->session_cache_head))
839 { /* first element in list */
840 ctx->session_cache_head=s->next;
841 s->next->prev=(SSL_SESSION *)&(ctx->session_cache_head);
844 { /* middle of list */
845 s->next->prev=s->prev;
846 s->prev->next=s->next;
849 s->prev=s->next=NULL;
852 static void SSL_SESSION_list_add(SSL_CTX *ctx, SSL_SESSION *s)
854 if ((s->next != NULL) && (s->prev != NULL))
855 SSL_SESSION_list_remove(ctx,s);
857 if (ctx->session_cache_head == NULL)
859 ctx->session_cache_head=s;
860 ctx->session_cache_tail=s;
861 s->prev=(SSL_SESSION *)&(ctx->session_cache_head);
862 s->next=(SSL_SESSION *)&(ctx->session_cache_tail);
866 s->next=ctx->session_cache_head;
868 s->prev=(SSL_SESSION *)&(ctx->session_cache_head);
869 ctx->session_cache_head=s;