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 */
74 return (ssl->session);
77 SSL_SESSION *SSL_get1_session(SSL *ssl)
78 /* variant of SSL_get_session: caller really gets something */
82 * Need to lock this all up rather than just use CRYPTO_add so that
83 * somebody doesn't free ssl->session between when we check it's non-null
84 * and when we up the reference count.
86 CRYPTO_w_lock(CRYPTO_LOCK_SSL_SESSION);
90 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_SESSION);
94 int SSL_SESSION_get_ex_new_index(long argl, void *argp,
95 CRYPTO_EX_new *new_func,
96 CRYPTO_EX_dup *dup_func,
97 CRYPTO_EX_free *free_func)
99 return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL_SESSION, argl, argp,
100 new_func, dup_func, free_func);
103 int SSL_SESSION_set_ex_data(SSL_SESSION *s, int idx, void *arg)
105 return (CRYPTO_set_ex_data(&s->ex_data, idx, arg));
108 void *SSL_SESSION_get_ex_data(const SSL_SESSION *s, int idx)
110 return (CRYPTO_get_ex_data(&s->ex_data, idx));
113 SSL_SESSION *SSL_SESSION_new(void)
117 ss = (SSL_SESSION *)OPENSSL_malloc(sizeof(SSL_SESSION));
119 SSLerr(SSL_F_SSL_SESSION_NEW, ERR_R_MALLOC_FAILURE);
122 memset(ss, 0, sizeof(SSL_SESSION));
124 ss->verify_result = 1; /* avoid 0 (= X509_V_OK) just in case */
126 ss->timeout = 60 * 5 + 4; /* 5 minute timeout by default */
127 ss->time = (unsigned long)time(NULL);
130 ss->compress_meth = 0;
131 #ifndef OPENSSL_NO_TLSEXT
132 ss->tlsext_hostname = NULL;
134 CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_SESSION, ss, &ss->ex_data);
139 * Create a new SSL_SESSION and duplicate the contents of |src| into it. If
140 * ticket == 0 then no ticket information is duplicated, otherwise it is.
142 SSL_SESSION *ssl_session_dup(SSL_SESSION *src, int ticket)
146 dest = OPENSSL_malloc(sizeof(*src));
150 memcpy(dest, src, sizeof(*dest));
153 * Set the various pointers to NULL so that we can call SSL_SESSION_free in
154 * the case of an error whilst halfway through constructing dest
156 dest->ciphers = NULL;
157 #ifndef OPENSSL_NO_TLSEXT
158 dest->tlsext_hostname = NULL;
160 dest->tlsext_tick = NULL;
161 memset(&dest->ex_data, 0, sizeof(dest->ex_data));
163 /* We deliberately don't copy the prev and next pointers */
167 dest->references = 1;
169 if (src->sess_cert != NULL)
170 CRYPTO_add(&src->sess_cert->references, 1, CRYPTO_LOCK_SSL_SESS_CERT);
172 if (src->peer != NULL)
173 CRYPTO_add(&src->peer->references, 1, CRYPTO_LOCK_X509);
175 if(src->ciphers != NULL) {
176 dest->ciphers = sk_SSL_CIPHER_dup(src->ciphers);
177 if (dest->ciphers == NULL)
181 if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_SSL_SESSION,
182 &dest->ex_data, &src->ex_data)) {
186 #ifndef OPENSSL_NO_TLSEXT
187 if (src->tlsext_hostname) {
188 dest->tlsext_hostname = BUF_strdup(src->tlsext_hostname);
189 if (dest->tlsext_hostname == NULL) {
196 dest->tlsext_tick = BUF_memdup(src->tlsext_tick, src->tlsext_ticklen);
197 if(dest->tlsext_tick == NULL)
200 dest->tlsext_tick_lifetime_hint = 0;
201 dest->tlsext_ticklen = 0;
206 SSLerr(SSL_F_SSL_SESSION_DUP, ERR_R_MALLOC_FAILURE);
207 SSL_SESSION_free(dest);
211 const unsigned char *SSL_SESSION_get_id(const SSL_SESSION *s,
215 *len = s->session_id_length;
216 return s->session_id;
220 * Even with SSLv2, we have 16 bytes (128 bits) of session ID space.
221 * SSLv3/TLSv1 has 32 bytes (256 bits). As such, filling the ID with random
222 * gunk repeatedly until we have no conflict is going to complete in one
223 * iteration pretty much "most" of the time (btw: understatement). So, if it
224 * takes us 10 iterations and we still can't avoid a conflict - well that's a
225 * reasonable point to call it quits. Either the RAND code is broken or
226 * someone is trying to open roughly very close to 2^128 (or 2^256) SSL
227 * sessions to our server. How you might store that many sessions is perhaps
228 * 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 */
245 * XXX We should also check the external cache -- but the probability of
246 * a collision is negligible, and we could not prevent the concurrent
247 * creation of sessions with identical IDs since we currently don't have
248 * means to atomically check whether a session ID already exists and make
249 * a reservation for it if it does not (this problem applies to the
250 * 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)
266 /* If the context has a default timeout, use it */
267 if (s->ctx->session_timeout == 0)
268 ss->timeout = SSL_get_default_timeout(s);
270 ss->timeout = s->ctx->session_timeout;
272 if (s->session != NULL) {
273 SSL_SESSION_free(s->session);
278 if (s->version == SSL2_VERSION) {
279 ss->ssl_version = SSL2_VERSION;
280 ss->session_id_length = SSL2_SSL_SESSION_ID_LENGTH;
281 } else if (s->version == SSL3_VERSION) {
282 ss->ssl_version = SSL3_VERSION;
283 ss->session_id_length = SSL3_SSL_SESSION_ID_LENGTH;
284 } else if (s->version == TLS1_VERSION) {
285 ss->ssl_version = TLS1_VERSION;
286 ss->session_id_length = SSL3_SSL_SESSION_ID_LENGTH;
287 } else if (s->version == DTLS1_BAD_VER) {
288 ss->ssl_version = DTLS1_BAD_VER;
289 ss->session_id_length = SSL3_SSL_SESSION_ID_LENGTH;
290 } else if (s->version == DTLS1_VERSION) {
291 ss->ssl_version = DTLS1_VERSION;
292 ss->session_id_length = SSL3_SSL_SESSION_ID_LENGTH;
294 SSLerr(SSL_F_SSL_GET_NEW_SESSION, SSL_R_UNSUPPORTED_SSL_VERSION);
295 SSL_SESSION_free(ss);
298 #ifndef OPENSSL_NO_TLSEXT
299 /* If RFC4507 ticket use empty session ID */
300 if (s->tlsext_ticket_expected) {
301 ss->session_id_length = 0;
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->ctx->generate_session_id)
310 cb = s->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)) {
315 /* The callback failed */
316 SSLerr(SSL_F_SSL_GET_NEW_SESSION,
317 SSL_R_SSL_SESSION_ID_CALLBACK_FAILED);
318 SSL_SESSION_free(ss);
322 * Don't allow the callback to set the session length to zero. nor
323 * set it higher than it was.
325 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)) {
340 SSLerr(SSL_F_SSL_GET_NEW_SESSION, SSL_R_SSL_SESSION_ID_CONFLICT);
341 SSL_SESSION_free(ss);
344 #ifndef OPENSSL_NO_TLSEXT
346 if (s->tlsext_hostname) {
347 ss->tlsext_hostname = BUF_strdup(s->tlsext_hostname);
348 if (ss->tlsext_hostname == NULL) {
349 SSLerr(SSL_F_SSL_GET_NEW_SESSION, ERR_R_INTERNAL_ERROR);
350 SSL_SESSION_free(ss);
356 ss->session_id_length = 0;
359 if (s->sid_ctx_length > sizeof ss->sid_ctx) {
360 SSLerr(SSL_F_SSL_GET_NEW_SESSION, ERR_R_INTERNAL_ERROR);
361 SSL_SESSION_free(ss);
364 memcpy(ss->sid_ctx, s->sid_ctx, s->sid_ctx_length);
365 ss->sid_ctx_length = s->sid_ctx_length;
367 ss->ssl_version = s->version;
368 ss->verify_result = X509_V_OK;
373 int ssl_get_prev_session(SSL *s, unsigned char *session_id, int len,
374 const unsigned char *limit)
376 /* This is used only by servers. */
378 SSL_SESSION *ret = NULL;
380 #ifndef OPENSSL_NO_TLSEXT
384 if (len > SSL_MAX_SSL_SESSION_ID_LENGTH)
387 if (session_id + len > limit) {
392 #ifndef OPENSSL_NO_TLSEXT
393 r = tls1_process_ticket(s, session_id, len, limit, &ret);
397 } else if (r == 0 || (!ret && !len))
400 && !(s->session_ctx->session_cache_mode &
401 SSL_SESS_CACHE_NO_INTERNAL_LOOKUP))
405 if (!(s->ctx->session_cache_mode & SSL_SESS_CACHE_NO_INTERNAL_LOOKUP))
409 data.ssl_version = s->version;
410 data.session_id_length = len;
413 memcpy(data.session_id, session_id, len);
414 CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);
415 ret = (SSL_SESSION *)lh_retrieve(s->ctx->sessions, &data);
417 /* don't allow other threads to steal it: */
418 CRYPTO_add(&ret->references, 1, CRYPTO_LOCK_SSL_SESSION);
419 CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
425 s->ctx->stats.sess_miss++;
427 if (s->ctx->get_session_cb != NULL
428 && (ret = s->ctx->get_session_cb(s, session_id, len, ©))
430 s->ctx->stats.sess_cb_hit++;
433 * Increment reference count now if the session callback asks us
434 * to do so (note that if the session structures returned by the
435 * callback are shared between threads, it must handle the
436 * reference count itself [i.e. copy == 0], or things won't be
440 CRYPTO_add(&ret->references, 1, CRYPTO_LOCK_SSL_SESSION);
443 * Add the externally cached session to the internal cache as
444 * well if and only if we are supposed to.
448 ctx->session_cache_mode & SSL_SESS_CACHE_NO_INTERNAL_STORE))
450 * The following should not return 1, otherwise, things are
453 SSL_CTX_add_session(s->ctx, ret);
459 /* Now ret is non-NULL, and we own one of its reference counts. */
461 if (ret->sid_ctx_length != s->sid_ctx_length
462 || memcmp(ret->sid_ctx, s->sid_ctx, ret->sid_ctx_length)) {
464 * We've found the session named by the client, but we don't want to
465 * use it in this context.
468 #if 0 /* The client cannot always know when a
469 * session is not appropriate, so we
470 * shouldn't generate an error message. */
472 SSLerr(SSL_F_SSL_GET_PREV_SESSION,
473 SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT);
475 goto err; /* treat like cache miss */
478 if ((s->verify_mode & SSL_VERIFY_PEER) && s->sid_ctx_length == 0) {
480 * We can't be sure if this session is being used out of context,
481 * which is especially important for SSL_VERIFY_PEER. The application
482 * should have used SSL[_CTX]_set_session_id_context. For this error
483 * case, we generate an error instead of treating the event like a
484 * cache miss (otherwise it would be easy for applications to
485 * effectively disable the session cache by accident without anyone
489 SSLerr(SSL_F_SSL_GET_PREV_SESSION,
490 SSL_R_SESSION_ID_CONTEXT_UNINITIALIZED);
495 if (ret->cipher == NULL) {
496 unsigned char buf[5], *p;
502 if ((ret->ssl_version >> 8) >= SSL3_VERSION_MAJOR)
503 ret->cipher = ssl_get_cipher_by_char(s, &(buf[2]));
505 ret->cipher = ssl_get_cipher_by_char(s, &(buf[1]));
506 if (ret->cipher == NULL)
509 #if 0 /* This is way too late. */
512 * If a thread got the session, then 'swaped', and another got it and
513 * then due to a time-out decided to 'OPENSSL_free' it we could be in
514 * trouble. So I'll increment it now, then double decrement later - am I
517 CRYPTO_add(&ret->references, 1, CRYPTO_LOCK_SSL_SESSION);
520 if (ret->timeout < (long)(time(NULL) - ret->time)) { /* timeout */
521 s->ctx->stats.sess_timeout++;
522 /* remove it from the cache */
523 SSL_CTX_remove_session(s->ctx, ret);
527 s->ctx->stats.sess_hit++;
529 /*- ret->time=time(NULL); *//*
533 * again, just leave the session if it is the same session, we have just
534 * incremented and then decremented the reference count :-)
536 if (s->session != NULL)
537 SSL_SESSION_free(s->session);
539 s->verify_result = s->session->verify_result;
544 SSL_SESSION_free(ret);
551 int SSL_CTX_add_session(SSL_CTX *ctx, SSL_SESSION *c)
557 * add just 1 reference count for the SSL_CTX's session cache even though
558 * it has two ways of access: each session is in a doubly linked list and
561 CRYPTO_add(&c->references, 1, CRYPTO_LOCK_SSL_SESSION);
563 * if session c is in already in cache, we take back the increment later
566 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
567 s = (SSL_SESSION *)lh_insert(ctx->sessions, c);
570 * s != NULL iff we already had a session with the given PID. In this
571 * case, s == c should hold (then we did not really modify
572 * ctx->sessions), or we're in trouble.
574 if (s != NULL && s != c) {
575 /* We *are* in trouble ... */
576 SSL_SESSION_list_remove(ctx, s);
579 * ... so pretend the other session did not exist in cache (we cannot
580 * handle two SSL_SESSION structures with identical session ID in the
581 * same cache, which could happen e.g. when two threads concurrently
582 * obtain the same session from an external cache)
587 /* Put at the head of the queue unless it is already in the cache */
589 SSL_SESSION_list_add(ctx, c);
593 * existing cache entry -- decrement previously incremented reference
594 * count because it already takes into account the cache
597 SSL_SESSION_free(s); /* s == c */
601 * new cache entry -- remove old ones if cache has become too large
606 if (SSL_CTX_sess_get_cache_size(ctx) > 0) {
607 while (SSL_CTX_sess_number(ctx) >
608 SSL_CTX_sess_get_cache_size(ctx)) {
609 if (!remove_session_lock(ctx, ctx->session_cache_tail, 0))
612 ctx->stats.sess_cache_full++;
616 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
620 int SSL_CTX_remove_session(SSL_CTX *ctx, SSL_SESSION *c)
622 return remove_session_lock(ctx, c, 1);
625 static int remove_session_lock(SSL_CTX *ctx, SSL_SESSION *c, int lck)
630 if ((c != NULL) && (c->session_id_length != 0)) {
632 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
633 if ((r = (SSL_SESSION *)lh_retrieve(ctx->sessions, c)) == c) {
635 r = (SSL_SESSION *)lh_delete(ctx->sessions, c);
636 SSL_SESSION_list_remove(ctx, c);
640 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
643 r->not_resumable = 1;
644 if (ctx->remove_session_cb != NULL)
645 ctx->remove_session_cb(ctx, r);
653 void SSL_SESSION_free(SSL_SESSION *ss)
660 i = CRYPTO_add(&ss->references, -1, CRYPTO_LOCK_SSL_SESSION);
662 REF_PRINT("SSL_SESSION", ss);
668 fprintf(stderr, "SSL_SESSION_free, bad reference count\n");
673 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_SESSION, ss, &ss->ex_data);
675 OPENSSL_cleanse(ss->key_arg, sizeof ss->key_arg);
676 OPENSSL_cleanse(ss->master_key, sizeof ss->master_key);
677 OPENSSL_cleanse(ss->session_id, sizeof ss->session_id);
678 if (ss->sess_cert != NULL)
679 ssl_sess_cert_free(ss->sess_cert);
680 if (ss->peer != NULL)
682 if (ss->ciphers != NULL)
683 sk_SSL_CIPHER_free(ss->ciphers);
684 #ifndef OPENSSL_NO_TLSEXT
685 if (ss->tlsext_hostname != NULL)
686 OPENSSL_free(ss->tlsext_hostname);
687 if (ss->tlsext_tick != NULL)
688 OPENSSL_free(ss->tlsext_tick);
690 OPENSSL_cleanse(ss, sizeof(*ss));
694 int SSL_set_session(SSL *s, SSL_SESSION *session)
699 if (session != NULL) {
700 meth = s->ctx->method->get_ssl_method(session->ssl_version);
702 meth = s->method->get_ssl_method(session->ssl_version);
704 SSLerr(SSL_F_SSL_SET_SESSION, SSL_R_UNABLE_TO_FIND_SSL_METHOD);
708 if (meth != s->method) {
709 if (!SSL_set_ssl_method(s, meth))
711 if (s->ctx->session_timeout == 0)
712 session->timeout = SSL_get_default_timeout(s);
714 session->timeout = s->ctx->session_timeout;
716 #ifndef OPENSSL_NO_KRB5
717 if (s->kssl_ctx && !s->kssl_ctx->client_princ &&
718 session->krb5_client_princ_len > 0) {
719 s->kssl_ctx->client_princ =
720 (char *)OPENSSL_malloc(session->krb5_client_princ_len + 1);
721 memcpy(s->kssl_ctx->client_princ, session->krb5_client_princ,
722 session->krb5_client_princ_len);
723 s->kssl_ctx->client_princ[session->krb5_client_princ_len] = '\0';
725 #endif /* OPENSSL_NO_KRB5 */
727 /* CRYPTO_w_lock(CRYPTO_LOCK_SSL); */
728 CRYPTO_add(&session->references, 1, CRYPTO_LOCK_SSL_SESSION);
729 if (s->session != NULL)
730 SSL_SESSION_free(s->session);
731 s->session = session;
732 s->verify_result = s->session->verify_result;
733 /* CRYPTO_w_unlock(CRYPTO_LOCK_SSL); */
736 if (s->session != NULL) {
737 SSL_SESSION_free(s->session);
741 meth = s->ctx->method;
742 if (meth != s->method) {
743 if (!SSL_set_ssl_method(s, meth))
751 long SSL_SESSION_set_timeout(SSL_SESSION *s, long t)
759 long SSL_SESSION_get_timeout(const SSL_SESSION *s)
766 long SSL_SESSION_get_time(const SSL_SESSION *s)
773 long SSL_SESSION_set_time(SSL_SESSION *s, long t)
781 long SSL_CTX_set_timeout(SSL_CTX *s, long t)
786 l = s->session_timeout;
787 s->session_timeout = t;
791 long SSL_CTX_get_timeout(const SSL_CTX *s)
795 return (s->session_timeout);
798 typedef struct timeout_param_st {
804 static void timeout(SSL_SESSION *s, TIMEOUT_PARAM *p)
806 if ((p->time == 0) || (p->time > (s->time + s->timeout))) { /* timeout */
808 * The reason we don't call SSL_CTX_remove_session() is to save on
811 lh_delete(p->cache, s);
812 SSL_SESSION_list_remove(p->ctx, s);
813 s->not_resumable = 1;
814 if (p->ctx->remove_session_cb != NULL)
815 p->ctx->remove_session_cb(p->ctx, s);
820 static IMPLEMENT_LHASH_DOALL_ARG_FN(timeout, SSL_SESSION *, TIMEOUT_PARAM *)
822 void SSL_CTX_flush_sessions(SSL_CTX *s, long t)
828 tp.cache = s->sessions;
829 if (tp.cache == NULL)
832 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
833 i = tp.cache->down_load;
834 tp.cache->down_load = 0;
835 lh_doall_arg(tp.cache, LHASH_DOALL_ARG_FN(timeout), &tp);
836 tp.cache->down_load = i;
837 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
840 int ssl_clear_bad_session(SSL *s)
842 if ((s->session != NULL) &&
843 !(s->shutdown & SSL_SENT_SHUTDOWN) &&
844 !(SSL_in_init(s) || SSL_in_before(s))) {
845 SSL_CTX_remove_session(s->ctx, s->session);
851 /* locked by SSL_CTX in the calling function */
852 static void SSL_SESSION_list_remove(SSL_CTX *ctx, SSL_SESSION *s)
854 if ((s->next == NULL) || (s->prev == NULL))
857 if (s->next == (SSL_SESSION *)&(ctx->session_cache_tail)) {
858 /* last element in list */
859 if (s->prev == (SSL_SESSION *)&(ctx->session_cache_head)) {
860 /* only one element in list */
861 ctx->session_cache_head = NULL;
862 ctx->session_cache_tail = NULL;
864 ctx->session_cache_tail = s->prev;
865 s->prev->next = (SSL_SESSION *)&(ctx->session_cache_tail);
868 if (s->prev == (SSL_SESSION *)&(ctx->session_cache_head)) {
869 /* first element in list */
870 ctx->session_cache_head = s->next;
871 s->next->prev = (SSL_SESSION *)&(ctx->session_cache_head);
874 s->next->prev = s->prev;
875 s->prev->next = s->next;
878 s->prev = s->next = NULL;
881 static void SSL_SESSION_list_add(SSL_CTX *ctx, SSL_SESSION *s)
883 if ((s->next != NULL) && (s->prev != NULL))
884 SSL_SESSION_list_remove(ctx, s);
886 if (ctx->session_cache_head == NULL) {
887 ctx->session_cache_head = s;
888 ctx->session_cache_tail = s;
889 s->prev = (SSL_SESSION *)&(ctx->session_cache_head);
890 s->next = (SSL_SESSION *)&(ctx->session_cache_tail);
892 s->next = ctx->session_cache_head;
894 s->prev = (SSL_SESSION *)&(ctx->session_cache_head);
895 ctx->session_cache_head = s;
899 void SSL_CTX_sess_set_new_cb(SSL_CTX *ctx,
900 int (*cb) (struct ssl_st *ssl,
903 ctx->new_session_cb = cb;
906 int (*SSL_CTX_sess_get_new_cb(SSL_CTX *ctx)) (SSL *ssl, SSL_SESSION *sess) {
907 return ctx->new_session_cb;
910 void SSL_CTX_sess_set_remove_cb(SSL_CTX *ctx,
911 void (*cb) (SSL_CTX *ctx, SSL_SESSION *sess))
913 ctx->remove_session_cb = cb;
916 void (*SSL_CTX_sess_get_remove_cb(SSL_CTX *ctx)) (SSL_CTX *ctx,
918 return ctx->remove_session_cb;
921 void SSL_CTX_sess_set_get_cb(SSL_CTX *ctx,
922 SSL_SESSION *(*cb) (struct ssl_st *ssl,
923 unsigned char *data, int len,
926 ctx->get_session_cb = cb;
929 SSL_SESSION *(*SSL_CTX_sess_get_get_cb(SSL_CTX *ctx)) (SSL *ssl,
931 int len, int *copy) {
932 return ctx->get_session_cb;
935 void SSL_CTX_set_info_callback(SSL_CTX *ctx,
936 void (*cb) (const SSL *ssl, int type, int val))
938 ctx->info_callback = cb;
941 void (*SSL_CTX_get_info_callback(SSL_CTX *ctx)) (const SSL *ssl, int type,
943 return ctx->info_callback;
946 void SSL_CTX_set_client_cert_cb(SSL_CTX *ctx,
947 int (*cb) (SSL *ssl, X509 **x509,
950 ctx->client_cert_cb = cb;
953 int (*SSL_CTX_get_client_cert_cb(SSL_CTX *ctx)) (SSL *ssl, X509 **x509,
955 return ctx->client_cert_cb;
958 #ifndef OPENSSL_NO_ENGINE
959 int SSL_CTX_set_client_cert_engine(SSL_CTX *ctx, ENGINE *e)
961 if (!ENGINE_init(e)) {
962 SSLerr(SSL_F_SSL_CTX_SET_CLIENT_CERT_ENGINE, ERR_R_ENGINE_LIB);
965 if (!ENGINE_get_ssl_client_cert_function(e)) {
966 SSLerr(SSL_F_SSL_CTX_SET_CLIENT_CERT_ENGINE,
967 SSL_R_NO_CLIENT_CERT_METHOD);
971 ctx->client_cert_engine = e;
976 void SSL_CTX_set_cookie_generate_cb(SSL_CTX *ctx,
978 unsigned char *cookie,
979 unsigned int *cookie_len))
981 ctx->app_gen_cookie_cb = cb;
984 void SSL_CTX_set_cookie_verify_cb(SSL_CTX *ctx,
985 int (*cb) (SSL *ssl, unsigned char *cookie,
986 unsigned int cookie_len))
988 ctx->app_verify_cookie_cb = cb;