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.]
60 #include <openssl/lhash.h>
61 #include <openssl/rand.h>
62 #ifndef OPENSSL_NO_ENGINE
63 #include <openssl/engine.h>
67 static void SSL_SESSION_list_remove(SSL_CTX *ctx, SSL_SESSION *s);
68 static void SSL_SESSION_list_add(SSL_CTX *ctx,SSL_SESSION *s);
69 static int remove_session_lock(SSL_CTX *ctx, SSL_SESSION *c, int lck);
71 SSL_SESSION *SSL_get_session(const SSL *ssl)
72 /* aka SSL_get0_session; gets 0 objects, just returns a copy of the pointer */
77 SSL_SESSION *SSL_get1_session(SSL *ssl)
78 /* variant of SSL_get_session: caller really gets something */
81 /* Need to lock this all up rather than just use CRYPTO_add so that
82 * somebody doesn't free ssl->session between when we check it's
83 * non-null and when we up the reference count. */
84 CRYPTO_w_lock(CRYPTO_LOCK_SSL_SESSION);
88 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_SESSION);
92 int SSL_SESSION_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
93 CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func)
95 return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL_SESSION, argl, argp,
96 new_func, dup_func, free_func);
99 int SSL_SESSION_set_ex_data(SSL_SESSION *s, int idx, void *arg)
101 return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
104 void *SSL_SESSION_get_ex_data(const SSL_SESSION *s, int idx)
106 return(CRYPTO_get_ex_data(&s->ex_data,idx));
109 SSL_SESSION *SSL_SESSION_new(void)
113 ss=(SSL_SESSION *)OPENSSL_malloc(sizeof(SSL_SESSION));
116 SSLerr(SSL_F_SSL_SESSION_NEW,ERR_R_MALLOC_FAILURE);
119 memset(ss,0,sizeof(SSL_SESSION));
121 ss->verify_result = 1; /* avoid 0 (= X509_V_OK) just in case */
123 ss->timeout=60*5+4; /* 5 minute timeout by default */
124 ss->time=(unsigned long)time(NULL);
128 #ifndef OPENSSL_NO_TLSEXT
129 ss->tlsext_hostname = NULL;
131 CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_SESSION, ss, &ss->ex_data);
136 * Create a new SSL_SESSION and duplicate the contents of |src| into it. If
137 * ticket == 0 then no ticket information is duplicated, otherwise it is.
139 SSL_SESSION *ssl_session_dup(SSL_SESSION *src, int ticket)
143 dest = OPENSSL_malloc(sizeof(*src));
147 memcpy(dest, src, sizeof(*dest));
150 * Set the various pointers to NULL so that we can call SSL_SESSION_free in
151 * the case of an error whilst halfway through constructing dest
153 dest->ciphers = NULL;
154 #ifndef OPENSSL_NO_TLSEXT
155 dest->tlsext_hostname = NULL;
157 dest->tlsext_tick = NULL;
158 memset(&dest->ex_data, 0, sizeof(dest->ex_data));
160 /* We deliberately don't copy the prev and next pointers */
164 dest->references = 1;
166 if (src->sess_cert != NULL)
167 CRYPTO_add(&src->sess_cert->references, 1, CRYPTO_LOCK_SSL_SESS_CERT);
169 if (src->peer != NULL)
170 CRYPTO_add(&src->peer->references, 1, CRYPTO_LOCK_X509);
172 if(src->ciphers != NULL) {
173 dest->ciphers = sk_SSL_CIPHER_dup(src->ciphers);
174 if (dest->ciphers == NULL)
178 if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_SSL_SESSION,
179 &dest->ex_data, &src->ex_data)) {
183 #ifndef OPENSSL_NO_TLSEXT
184 if (src->tlsext_hostname) {
185 dest->tlsext_hostname = BUF_strdup(src->tlsext_hostname);
186 if (dest->tlsext_hostname == NULL) {
193 dest->tlsext_tick = BUF_memdup(src->tlsext_tick, src->tlsext_ticklen);
194 if(dest->tlsext_tick == NULL)
197 dest->tlsext_tick_lifetime_hint = 0;
198 dest->tlsext_ticklen = 0;
203 SSLerr(SSL_F_SSL_SESSION_DUP, ERR_R_MALLOC_FAILURE);
204 SSL_SESSION_free(dest);
208 const unsigned char *SSL_SESSION_get_id(const SSL_SESSION *s, unsigned int *len)
211 *len = s->session_id_length;
212 return s->session_id;
215 /* Even with SSLv2, we have 16 bytes (128 bits) of session ID space. SSLv3/TLSv1
216 * has 32 bytes (256 bits). As such, filling the ID with random gunk repeatedly
217 * until we have no conflict is going to complete in one iteration pretty much
218 * "most" of the time (btw: understatement). So, if it takes us 10 iterations
219 * and we still can't avoid a conflict - well that's a reasonable point to call
220 * it quits. Either the RAND code is broken or someone is trying to open roughly
221 * very close to 2^128 (or 2^256) SSL sessions to our server. How you might
222 * store that many sessions is perhaps a more interesting question ... */
224 #define MAX_SESS_ID_ATTEMPTS 10
225 static int def_generate_session_id(const SSL *ssl, unsigned char *id,
226 unsigned int *id_len)
228 unsigned int retry = 0;
230 if (RAND_pseudo_bytes(id, *id_len) <= 0)
232 while(SSL_has_matching_session_id(ssl, id, *id_len) &&
233 (++retry < MAX_SESS_ID_ATTEMPTS));
234 if(retry < MAX_SESS_ID_ATTEMPTS)
236 /* else - woops a session_id match */
237 /* XXX We should also check the external cache --
238 * but the probability of a collision is negligible, and
239 * we could not prevent the concurrent creation of sessions
240 * with identical IDs since we currently don't have means
241 * to atomically check whether a session ID already exists
242 * and make a reservation for it if it does not
243 * (this problem applies to the internal cache as well).
248 int ssl_get_new_session(SSL *s, int session)
250 /* This gets used by clients and servers. */
253 SSL_SESSION *ss=NULL;
254 GEN_SESSION_CB cb = def_generate_session_id;
256 if ((ss=SSL_SESSION_new()) == NULL) return(0);
258 /* If the context has a default timeout, use it */
259 if (s->ctx->session_timeout == 0)
260 ss->timeout=SSL_get_default_timeout(s);
262 ss->timeout=s->ctx->session_timeout;
264 if (s->session != NULL)
266 SSL_SESSION_free(s->session);
272 if (s->version == SSL2_VERSION)
274 ss->ssl_version=SSL2_VERSION;
275 ss->session_id_length=SSL2_SSL_SESSION_ID_LENGTH;
277 else if (s->version == SSL3_VERSION)
279 ss->ssl_version=SSL3_VERSION;
280 ss->session_id_length=SSL3_SSL_SESSION_ID_LENGTH;
282 else if (s->version == TLS1_VERSION)
284 ss->ssl_version=TLS1_VERSION;
285 ss->session_id_length=SSL3_SSL_SESSION_ID_LENGTH;
287 else if (s->version == DTLS1_BAD_VER)
289 ss->ssl_version=DTLS1_BAD_VER;
290 ss->session_id_length=SSL3_SSL_SESSION_ID_LENGTH;
292 else if (s->version == DTLS1_VERSION)
294 ss->ssl_version=DTLS1_VERSION;
295 ss->session_id_length=SSL3_SSL_SESSION_ID_LENGTH;
299 SSLerr(SSL_F_SSL_GET_NEW_SESSION,SSL_R_UNSUPPORTED_SSL_VERSION);
300 SSL_SESSION_free(ss);
303 #ifndef OPENSSL_NO_TLSEXT
304 /* If RFC4507 ticket use empty session ID */
305 if (s->tlsext_ticket_expected)
307 ss->session_id_length = 0;
311 /* Choose which callback will set the session ID */
312 CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);
313 if(s->generate_session_id)
314 cb = s->generate_session_id;
315 else if(s->ctx->generate_session_id)
316 cb = s->ctx->generate_session_id;
317 CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
318 /* Choose a session ID */
319 tmp = ss->session_id_length;
320 if(!cb(s, ss->session_id, &tmp))
322 /* The callback failed */
323 SSLerr(SSL_F_SSL_GET_NEW_SESSION,
324 SSL_R_SSL_SESSION_ID_CALLBACK_FAILED);
325 SSL_SESSION_free(ss);
328 /* Don't allow the callback to set the session length to zero.
329 * nor set it higher than it was. */
330 if(!tmp || (tmp > ss->session_id_length))
332 /* The callback set an illegal length */
333 SSLerr(SSL_F_SSL_GET_NEW_SESSION,
334 SSL_R_SSL_SESSION_ID_HAS_BAD_LENGTH);
335 SSL_SESSION_free(ss);
338 /* If the session length was shrunk and we're SSLv2, pad it */
339 if((tmp < ss->session_id_length) && (s->version == SSL2_VERSION))
340 memset(ss->session_id + tmp, 0, ss->session_id_length - tmp);
342 ss->session_id_length = tmp;
343 /* Finally, check for a conflict */
344 if(SSL_has_matching_session_id(s, ss->session_id,
345 ss->session_id_length))
347 SSLerr(SSL_F_SSL_GET_NEW_SESSION,
348 SSL_R_SSL_SESSION_ID_CONFLICT);
349 SSL_SESSION_free(ss);
352 #ifndef OPENSSL_NO_TLSEXT
354 if (s->tlsext_hostname) {
355 ss->tlsext_hostname = BUF_strdup(s->tlsext_hostname);
356 if (ss->tlsext_hostname == NULL) {
357 SSLerr(SSL_F_SSL_GET_NEW_SESSION, ERR_R_INTERNAL_ERROR);
358 SSL_SESSION_free(ss);
366 ss->session_id_length=0;
369 if (s->sid_ctx_length > sizeof ss->sid_ctx)
371 SSLerr(SSL_F_SSL_GET_NEW_SESSION, ERR_R_INTERNAL_ERROR);
372 SSL_SESSION_free(ss);
375 memcpy(ss->sid_ctx,s->sid_ctx,s->sid_ctx_length);
376 ss->sid_ctx_length=s->sid_ctx_length;
378 ss->ssl_version=s->version;
379 ss->verify_result = X509_V_OK;
384 int ssl_get_prev_session(SSL *s, unsigned char *session_id, int len,
385 const unsigned char *limit)
387 /* This is used only by servers. */
389 SSL_SESSION *ret=NULL;
391 #ifndef OPENSSL_NO_TLSEXT
395 if (len > SSL_MAX_SSL_SESSION_ID_LENGTH)
397 #ifndef OPENSSL_NO_TLSEXT
398 r = tls1_process_ticket(s, session_id, len, limit, &ret);
404 else if (r == 0 || (!ret && !len))
406 else if (!ret && !(s->session_ctx->session_cache_mode & SSL_SESS_CACHE_NO_INTERNAL_LOOKUP))
410 if (!(s->ctx->session_cache_mode & SSL_SESS_CACHE_NO_INTERNAL_LOOKUP))
414 data.ssl_version=s->version;
415 data.session_id_length=len;
418 memcpy(data.session_id,session_id,len);
419 CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);
420 ret=(SSL_SESSION *)lh_retrieve(s->ctx->sessions,&data);
422 /* don't allow other threads to steal it: */
423 CRYPTO_add(&ret->references,1,CRYPTO_LOCK_SSL_SESSION);
424 CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
431 s->ctx->stats.sess_miss++;
433 if (s->ctx->get_session_cb != NULL
434 && (ret=s->ctx->get_session_cb(s,session_id,len,©))
437 s->ctx->stats.sess_cb_hit++;
439 /* Increment reference count now if the session callback
440 * asks us to do so (note that if the session structures
441 * returned by the callback are shared between threads,
442 * it must handle the reference count itself [i.e. copy == 0],
443 * or things won't be thread-safe). */
445 CRYPTO_add(&ret->references,1,CRYPTO_LOCK_SSL_SESSION);
447 /* Add the externally cached session to the internal
448 * cache as well if and only if we are supposed to. */
449 if(!(s->ctx->session_cache_mode & SSL_SESS_CACHE_NO_INTERNAL_STORE))
450 /* The following should not return 1, otherwise,
451 * things are very strange */
452 SSL_CTX_add_session(s->ctx,ret);
458 /* Now ret is non-NULL, and we own one of its reference counts. */
460 if (ret->sid_ctx_length != s->sid_ctx_length
461 || memcmp(ret->sid_ctx,s->sid_ctx,ret->sid_ctx_length))
463 /* We've found the session named by the client, but we don't
464 * want to use it in this context. */
466 #if 0 /* The client cannot always know when a session is not appropriate,
467 * so we shouldn't generate an error message. */
469 SSLerr(SSL_F_SSL_GET_PREV_SESSION,SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT);
471 goto err; /* treat like cache miss */
474 if((s->verify_mode & SSL_VERIFY_PEER) && s->sid_ctx_length == 0)
476 /* We can't be sure if this session is being used out of
477 * context, which is especially important for SSL_VERIFY_PEER.
478 * The application should have used SSL[_CTX]_set_session_id_context.
480 * For this error case, we generate an error instead of treating
481 * the event like a cache miss (otherwise it would be easy for
482 * applications to effectively disable the session cache by
483 * accident without anyone noticing).
486 SSLerr(SSL_F_SSL_GET_PREV_SESSION,SSL_R_SESSION_ID_CONTEXT_UNINITIALIZED);
491 if (ret->cipher == NULL)
493 unsigned char buf[5],*p;
499 if ((ret->ssl_version>>8) >= SSL3_VERSION_MAJOR)
500 ret->cipher=ssl_get_cipher_by_char(s,&(buf[2]));
502 ret->cipher=ssl_get_cipher_by_char(s,&(buf[1]));
503 if (ret->cipher == NULL)
508 #if 0 /* This is way too late. */
510 /* If a thread got the session, then 'swaped', and another got
511 * it and then due to a time-out decided to 'OPENSSL_free' it we could
512 * be in trouble. So I'll increment it now, then double decrement
513 * later - am I speaking rubbish?. */
514 CRYPTO_add(&ret->references,1,CRYPTO_LOCK_SSL_SESSION);
517 if (ret->timeout < (long)(time(NULL) - ret->time)) /* timeout */
519 s->ctx->stats.sess_timeout++;
520 /* remove it from the cache */
521 SSL_CTX_remove_session(s->ctx,ret);
525 s->ctx->stats.sess_hit++;
527 /* ret->time=time(NULL); */ /* rezero timeout? */
528 /* again, just leave the session
529 * if it is the same session, we have just incremented and
530 * then decremented the reference count :-) */
531 if (s->session != NULL)
532 SSL_SESSION_free(s->session);
534 s->verify_result = s->session->verify_result;
539 SSL_SESSION_free(ret);
546 int SSL_CTX_add_session(SSL_CTX *ctx, SSL_SESSION *c)
551 /* add just 1 reference count for the SSL_CTX's session cache
552 * even though it has two ways of access: each session is in a
553 * doubly linked list and an lhash */
554 CRYPTO_add(&c->references,1,CRYPTO_LOCK_SSL_SESSION);
555 /* if session c is in already in cache, we take back the increment later */
557 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
558 s=(SSL_SESSION *)lh_insert(ctx->sessions,c);
560 /* s != NULL iff we already had a session with the given PID.
561 * In this case, s == c should hold (then we did not really modify
562 * ctx->sessions), or we're in trouble. */
563 if (s != NULL && s != c)
565 /* We *are* in trouble ... */
566 SSL_SESSION_list_remove(ctx,s);
568 /* ... so pretend the other session did not exist in cache
569 * (we cannot handle two SSL_SESSION structures with identical
570 * session ID in the same cache, which could happen e.g. when
571 * two threads concurrently obtain the same session from an external
576 /* Put at the head of the queue unless it is already in the cache */
578 SSL_SESSION_list_add(ctx,c);
582 /* existing cache entry -- decrement previously incremented reference
583 * count because it already takes into account the cache */
585 SSL_SESSION_free(s); /* s == c */
590 /* new cache entry -- remove old ones if cache has become too large */
594 if (SSL_CTX_sess_get_cache_size(ctx) > 0)
596 while (SSL_CTX_sess_number(ctx) >
597 SSL_CTX_sess_get_cache_size(ctx))
599 if (!remove_session_lock(ctx,
600 ctx->session_cache_tail, 0))
603 ctx->stats.sess_cache_full++;
607 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
611 int SSL_CTX_remove_session(SSL_CTX *ctx, SSL_SESSION *c)
613 return remove_session_lock(ctx, c, 1);
616 static int remove_session_lock(SSL_CTX *ctx, SSL_SESSION *c, int lck)
621 if ((c != NULL) && (c->session_id_length != 0))
623 if(lck) CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
624 if ((r = (SSL_SESSION *)lh_retrieve(ctx->sessions,c)) == c)
627 r=(SSL_SESSION *)lh_delete(ctx->sessions,c);
628 SSL_SESSION_list_remove(ctx,c);
631 if(lck) CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
636 if (ctx->remove_session_cb != NULL)
637 ctx->remove_session_cb(ctx,r);
646 void SSL_SESSION_free(SSL_SESSION *ss)
653 i=CRYPTO_add(&ss->references,-1,CRYPTO_LOCK_SSL_SESSION);
655 REF_PRINT("SSL_SESSION",ss);
661 fprintf(stderr,"SSL_SESSION_free, bad reference count\n");
666 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_SESSION, ss, &ss->ex_data);
668 OPENSSL_cleanse(ss->key_arg,sizeof ss->key_arg);
669 OPENSSL_cleanse(ss->master_key,sizeof ss->master_key);
670 OPENSSL_cleanse(ss->session_id,sizeof ss->session_id);
671 if (ss->sess_cert != NULL) ssl_sess_cert_free(ss->sess_cert);
672 if (ss->peer != NULL) X509_free(ss->peer);
673 if (ss->ciphers != NULL) sk_SSL_CIPHER_free(ss->ciphers);
674 #ifndef OPENSSL_NO_TLSEXT
675 if (ss->tlsext_hostname != NULL) OPENSSL_free(ss->tlsext_hostname);
676 if (ss->tlsext_tick != NULL) OPENSSL_free(ss->tlsext_tick);
678 OPENSSL_cleanse(ss,sizeof(*ss));
682 int SSL_set_session(SSL *s, SSL_SESSION *session)
689 meth=s->ctx->method->get_ssl_method(session->ssl_version);
691 meth=s->method->get_ssl_method(session->ssl_version);
694 SSLerr(SSL_F_SSL_SET_SESSION,SSL_R_UNABLE_TO_FIND_SSL_METHOD);
698 if (meth != s->method)
700 if (!SSL_set_ssl_method(s,meth))
702 if (s->ctx->session_timeout == 0)
703 session->timeout=SSL_get_default_timeout(s);
705 session->timeout=s->ctx->session_timeout;
708 #ifndef OPENSSL_NO_KRB5
709 if (s->kssl_ctx && !s->kssl_ctx->client_princ &&
710 session->krb5_client_princ_len > 0)
712 s->kssl_ctx->client_princ = (char *)OPENSSL_malloc(session->krb5_client_princ_len + 1);
713 memcpy(s->kssl_ctx->client_princ,session->krb5_client_princ,
714 session->krb5_client_princ_len);
715 s->kssl_ctx->client_princ[session->krb5_client_princ_len] = '\0';
717 #endif /* OPENSSL_NO_KRB5 */
719 /* CRYPTO_w_lock(CRYPTO_LOCK_SSL);*/
720 CRYPTO_add(&session->references,1,CRYPTO_LOCK_SSL_SESSION);
721 if (s->session != NULL)
722 SSL_SESSION_free(s->session);
724 s->verify_result = s->session->verify_result;
725 /* CRYPTO_w_unlock(CRYPTO_LOCK_SSL);*/
730 if (s->session != NULL)
732 SSL_SESSION_free(s->session);
737 if (meth != s->method)
739 if (!SSL_set_ssl_method(s,meth))
747 long SSL_SESSION_set_timeout(SSL_SESSION *s, long t)
749 if (s == NULL) return(0);
754 long SSL_SESSION_get_timeout(const SSL_SESSION *s)
756 if (s == NULL) return(0);
760 long SSL_SESSION_get_time(const SSL_SESSION *s)
762 if (s == NULL) return(0);
766 long SSL_SESSION_set_time(SSL_SESSION *s, long t)
768 if (s == NULL) return(0);
773 long SSL_CTX_set_timeout(SSL_CTX *s, long t)
776 if (s == NULL) return(0);
777 l=s->session_timeout;
778 s->session_timeout=t;
782 long SSL_CTX_get_timeout(const SSL_CTX *s)
784 if (s == NULL) return(0);
785 return(s->session_timeout);
788 typedef struct timeout_param_st
795 static void timeout(SSL_SESSION *s, TIMEOUT_PARAM *p)
797 if ((p->time == 0) || (p->time > (s->time+s->timeout))) /* timeout */
799 /* The reason we don't call SSL_CTX_remove_session() is to
800 * save on locking overhead */
801 lh_delete(p->cache,s);
802 SSL_SESSION_list_remove(p->ctx,s);
804 if (p->ctx->remove_session_cb != NULL)
805 p->ctx->remove_session_cb(p->ctx,s);
810 static IMPLEMENT_LHASH_DOALL_ARG_FN(timeout, SSL_SESSION *, TIMEOUT_PARAM *)
812 void SSL_CTX_flush_sessions(SSL_CTX *s, long t)
818 tp.cache=s->sessions;
819 if (tp.cache == NULL) return;
821 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
822 i=tp.cache->down_load;
823 tp.cache->down_load=0;
824 lh_doall_arg(tp.cache, LHASH_DOALL_ARG_FN(timeout), &tp);
825 tp.cache->down_load=i;
826 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
829 int ssl_clear_bad_session(SSL *s)
831 if ( (s->session != NULL) &&
832 !(s->shutdown & SSL_SENT_SHUTDOWN) &&
833 !(SSL_in_init(s) || SSL_in_before(s)))
835 SSL_CTX_remove_session(s->ctx,s->session);
842 /* locked by SSL_CTX in the calling function */
843 static void SSL_SESSION_list_remove(SSL_CTX *ctx, SSL_SESSION *s)
845 if ((s->next == NULL) || (s->prev == NULL)) return;
847 if (s->next == (SSL_SESSION *)&(ctx->session_cache_tail))
848 { /* last element in list */
849 if (s->prev == (SSL_SESSION *)&(ctx->session_cache_head))
850 { /* only one element in list */
851 ctx->session_cache_head=NULL;
852 ctx->session_cache_tail=NULL;
856 ctx->session_cache_tail=s->prev;
857 s->prev->next=(SSL_SESSION *)&(ctx->session_cache_tail);
862 if (s->prev == (SSL_SESSION *)&(ctx->session_cache_head))
863 { /* first element in list */
864 ctx->session_cache_head=s->next;
865 s->next->prev=(SSL_SESSION *)&(ctx->session_cache_head);
868 { /* middle of list */
869 s->next->prev=s->prev;
870 s->prev->next=s->next;
873 s->prev=s->next=NULL;
876 static void SSL_SESSION_list_add(SSL_CTX *ctx, SSL_SESSION *s)
878 if ((s->next != NULL) && (s->prev != NULL))
879 SSL_SESSION_list_remove(ctx,s);
881 if (ctx->session_cache_head == NULL)
883 ctx->session_cache_head=s;
884 ctx->session_cache_tail=s;
885 s->prev=(SSL_SESSION *)&(ctx->session_cache_head);
886 s->next=(SSL_SESSION *)&(ctx->session_cache_tail);
890 s->next=ctx->session_cache_head;
892 s->prev=(SSL_SESSION *)&(ctx->session_cache_head);
893 ctx->session_cache_head=s;
897 void SSL_CTX_sess_set_new_cb(SSL_CTX *ctx,
898 int (*cb)(struct ssl_st *ssl,SSL_SESSION *sess))
900 ctx->new_session_cb=cb;
903 int (*SSL_CTX_sess_get_new_cb(SSL_CTX *ctx))(SSL *ssl, SSL_SESSION *sess)
905 return ctx->new_session_cb;
908 void SSL_CTX_sess_set_remove_cb(SSL_CTX *ctx,
909 void (*cb)(SSL_CTX *ctx,SSL_SESSION *sess))
911 ctx->remove_session_cb=cb;
914 void (*SSL_CTX_sess_get_remove_cb(SSL_CTX *ctx))(SSL_CTX * ctx,SSL_SESSION *sess)
916 return ctx->remove_session_cb;
919 void SSL_CTX_sess_set_get_cb(SSL_CTX *ctx,
920 SSL_SESSION *(*cb)(struct ssl_st *ssl,
921 unsigned char *data,int len,int *copy))
923 ctx->get_session_cb=cb;
926 SSL_SESSION * (*SSL_CTX_sess_get_get_cb(SSL_CTX *ctx))(SSL *ssl,
927 unsigned char *data,int len,int *copy)
929 return ctx->get_session_cb;
932 void SSL_CTX_set_info_callback(SSL_CTX *ctx,
933 void (*cb)(const SSL *ssl,int type,int val))
935 ctx->info_callback=cb;
938 void (*SSL_CTX_get_info_callback(SSL_CTX *ctx))(const SSL *ssl,int type,int val)
940 return ctx->info_callback;
943 void SSL_CTX_set_client_cert_cb(SSL_CTX *ctx,
944 int (*cb)(SSL *ssl, X509 **x509, EVP_PKEY **pkey))
946 ctx->client_cert_cb=cb;
949 int (*SSL_CTX_get_client_cert_cb(SSL_CTX *ctx))(SSL * ssl, X509 ** x509 , EVP_PKEY **pkey)
951 return ctx->client_cert_cb;
954 #ifndef OPENSSL_NO_ENGINE
955 int SSL_CTX_set_client_cert_engine(SSL_CTX *ctx, ENGINE *e)
959 SSLerr(SSL_F_SSL_CTX_SET_CLIENT_CERT_ENGINE, ERR_R_ENGINE_LIB);
962 if(!ENGINE_get_ssl_client_cert_function(e))
964 SSLerr(SSL_F_SSL_CTX_SET_CLIENT_CERT_ENGINE, SSL_R_NO_CLIENT_CERT_METHOD);
968 ctx->client_cert_engine = e;
973 void SSL_CTX_set_cookie_generate_cb(SSL_CTX *ctx,
974 int (*cb)(SSL *ssl, unsigned char *cookie, unsigned int *cookie_len))
976 ctx->app_gen_cookie_cb=cb;
979 void SSL_CTX_set_cookie_verify_cb(SSL_CTX *ctx,
980 int (*cb)(SSL *ssl, unsigned char *cookie, unsigned int cookie_len))
982 ctx->app_verify_cookie_cb=cb;