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));
152 #ifndef OPENSSL_NO_KRB5
153 dest->krb5_client_princ_len = dest->krb5_client_princ_len;
154 if (src->krb5_client_princ_len > 0)
155 memcpy(dest->krb5_client_princ, src->krb5_client_princ,
156 src->krb5_client_princ_len);
159 if (src->sess_cert != NULL)
160 CRYPTO_add(&src->sess_cert->references, 1, CRYPTO_LOCK_SSL_SESS_CERT);
162 if (src->peer != NULL)
163 CRYPTO_add(&src->peer->references, 1, CRYPTO_LOCK_X509);
165 dest->references = 1;
167 if(src->ciphers != NULL) {
168 dest->ciphers = sk_SSL_CIPHER_dup(src->ciphers);
169 if (dest->ciphers == NULL)
172 dest->ciphers = NULL;
175 if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_SSL_SESSION,
176 &dest->ex_data, &src->ex_data)) {
180 /* We deliberately don't copy the prev and next pointers */
184 #ifndef OPENSSL_NO_TLSEXT
185 if (src->tlsext_hostname) {
186 dest->tlsext_hostname = BUF_strdup(src->tlsext_hostname);
187 if (dest->tlsext_hostname == NULL) {
191 dest->tlsext_hostname = NULL;
196 dest->tlsext_tick_lifetime_hint = src->tlsext_tick_lifetime_hint;
197 dest->tlsext_ticklen = src->tlsext_ticklen;
198 if((dest->tlsext_tick = OPENSSL_malloc(src->tlsext_ticklen)) == NULL) {
205 SSLerr(SSL_F_SSL_SESSION_DUP, ERR_R_MALLOC_FAILURE);
206 SSL_SESSION_free(dest);
210 const unsigned char *SSL_SESSION_get_id(const SSL_SESSION *s,
214 *len = s->session_id_length;
215 return s->session_id;
219 * Even with SSLv2, we have 16 bytes (128 bits) of session ID space.
220 * SSLv3/TLSv1 has 32 bytes (256 bits). As such, filling the ID with random
221 * gunk repeatedly until we have no conflict is going to complete in one
222 * iteration pretty much "most" of the time (btw: understatement). So, if it
223 * takes us 10 iterations and we still can't avoid a conflict - well that's a
224 * reasonable point to call it quits. Either the RAND code is broken or
225 * someone is trying to open roughly very close to 2^128 (or 2^256) SSL
226 * sessions to our server. How you might store that many sessions is perhaps
227 * a more interesting question ...
230 #define MAX_SESS_ID_ATTEMPTS 10
231 static int def_generate_session_id(const SSL *ssl, unsigned char *id,
232 unsigned int *id_len)
234 unsigned int retry = 0;
236 if (RAND_pseudo_bytes(id, *id_len) <= 0)
238 while (SSL_has_matching_session_id(ssl, id, *id_len) &&
239 (++retry < MAX_SESS_ID_ATTEMPTS)) ;
240 if (retry < MAX_SESS_ID_ATTEMPTS)
242 /* else - woops a session_id match */
244 * XXX We should also check the external cache -- but the probability of
245 * a collision is negligible, and we could not prevent the concurrent
246 * creation of sessions with identical IDs since we currently don't have
247 * means to atomically check whether a session ID already exists and make
248 * a reservation for it if it does not (this problem applies to the
249 * internal cache as well).
254 int ssl_get_new_session(SSL *s, int session)
256 /* This gets used by clients and servers. */
259 SSL_SESSION *ss = NULL;
260 GEN_SESSION_CB cb = def_generate_session_id;
262 if ((ss = SSL_SESSION_new()) == NULL)
265 /* If the context has a default timeout, use it */
266 if (s->ctx->session_timeout == 0)
267 ss->timeout = SSL_get_default_timeout(s);
269 ss->timeout = s->ctx->session_timeout;
271 if (s->session != NULL) {
272 SSL_SESSION_free(s->session);
277 if (s->version == SSL2_VERSION) {
278 ss->ssl_version = SSL2_VERSION;
279 ss->session_id_length = SSL2_SSL_SESSION_ID_LENGTH;
280 } else if (s->version == SSL3_VERSION) {
281 ss->ssl_version = SSL3_VERSION;
282 ss->session_id_length = SSL3_SSL_SESSION_ID_LENGTH;
283 } else if (s->version == TLS1_VERSION) {
284 ss->ssl_version = TLS1_VERSION;
285 ss->session_id_length = SSL3_SSL_SESSION_ID_LENGTH;
286 } else if (s->version == DTLS1_BAD_VER) {
287 ss->ssl_version = DTLS1_BAD_VER;
288 ss->session_id_length = SSL3_SSL_SESSION_ID_LENGTH;
289 } else if (s->version == DTLS1_VERSION) {
290 ss->ssl_version = DTLS1_VERSION;
291 ss->session_id_length = SSL3_SSL_SESSION_ID_LENGTH;
293 SSLerr(SSL_F_SSL_GET_NEW_SESSION, SSL_R_UNSUPPORTED_SSL_VERSION);
294 SSL_SESSION_free(ss);
297 #ifndef OPENSSL_NO_TLSEXT
298 /* If RFC4507 ticket use empty session ID */
299 if (s->tlsext_ticket_expected) {
300 ss->session_id_length = 0;
304 /* Choose which callback will set the session ID */
305 CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);
306 if (s->generate_session_id)
307 cb = s->generate_session_id;
308 else if (s->ctx->generate_session_id)
309 cb = s->ctx->generate_session_id;
310 CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
311 /* Choose a session ID */
312 tmp = ss->session_id_length;
313 if (!cb(s, ss->session_id, &tmp)) {
314 /* The callback failed */
315 SSLerr(SSL_F_SSL_GET_NEW_SESSION,
316 SSL_R_SSL_SESSION_ID_CALLBACK_FAILED);
317 SSL_SESSION_free(ss);
321 * Don't allow the callback to set the session length to zero. nor
322 * set it higher than it was.
324 if (!tmp || (tmp > ss->session_id_length)) {
325 /* The callback set an illegal length */
326 SSLerr(SSL_F_SSL_GET_NEW_SESSION,
327 SSL_R_SSL_SESSION_ID_HAS_BAD_LENGTH);
328 SSL_SESSION_free(ss);
331 /* If the session length was shrunk and we're SSLv2, pad it */
332 if ((tmp < ss->session_id_length) && (s->version == SSL2_VERSION))
333 memset(ss->session_id + tmp, 0, ss->session_id_length - tmp);
335 ss->session_id_length = tmp;
336 /* Finally, check for a conflict */
337 if (SSL_has_matching_session_id(s, ss->session_id,
338 ss->session_id_length)) {
339 SSLerr(SSL_F_SSL_GET_NEW_SESSION, SSL_R_SSL_SESSION_ID_CONFLICT);
340 SSL_SESSION_free(ss);
343 #ifndef OPENSSL_NO_TLSEXT
345 if (s->tlsext_hostname) {
346 ss->tlsext_hostname = BUF_strdup(s->tlsext_hostname);
347 if (ss->tlsext_hostname == NULL) {
348 SSLerr(SSL_F_SSL_GET_NEW_SESSION, ERR_R_INTERNAL_ERROR);
349 SSL_SESSION_free(ss);
355 ss->session_id_length = 0;
358 if (s->sid_ctx_length > sizeof ss->sid_ctx) {
359 SSLerr(SSL_F_SSL_GET_NEW_SESSION, ERR_R_INTERNAL_ERROR);
360 SSL_SESSION_free(ss);
363 memcpy(ss->sid_ctx, s->sid_ctx, s->sid_ctx_length);
364 ss->sid_ctx_length = s->sid_ctx_length;
366 ss->ssl_version = s->version;
367 ss->verify_result = X509_V_OK;
372 int ssl_get_prev_session(SSL *s, unsigned char *session_id, int len,
373 const unsigned char *limit)
375 /* This is used only by servers. */
377 SSL_SESSION *ret = NULL;
379 #ifndef OPENSSL_NO_TLSEXT
383 if (len > SSL_MAX_SSL_SESSION_ID_LENGTH)
386 if (session_id + len > limit) {
391 #ifndef OPENSSL_NO_TLSEXT
392 r = tls1_process_ticket(s, session_id, len, limit, &ret);
396 } else if (r == 0 || (!ret && !len))
399 && !(s->session_ctx->session_cache_mode &
400 SSL_SESS_CACHE_NO_INTERNAL_LOOKUP))
404 if (!(s->ctx->session_cache_mode & SSL_SESS_CACHE_NO_INTERNAL_LOOKUP))
408 data.ssl_version = s->version;
409 data.session_id_length = len;
412 memcpy(data.session_id, session_id, len);
413 CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);
414 ret = (SSL_SESSION *)lh_retrieve(s->ctx->sessions, &data);
416 /* don't allow other threads to steal it: */
417 CRYPTO_add(&ret->references, 1, CRYPTO_LOCK_SSL_SESSION);
418 CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
424 s->ctx->stats.sess_miss++;
426 if (s->ctx->get_session_cb != NULL
427 && (ret = s->ctx->get_session_cb(s, session_id, len, ©))
429 s->ctx->stats.sess_cb_hit++;
432 * Increment reference count now if the session callback asks us
433 * to do so (note that if the session structures returned by the
434 * callback are shared between threads, it must handle the
435 * reference count itself [i.e. copy == 0], or things won't be
439 CRYPTO_add(&ret->references, 1, CRYPTO_LOCK_SSL_SESSION);
442 * Add the externally cached session to the internal cache as
443 * well if and only if we are supposed to.
447 ctx->session_cache_mode & SSL_SESS_CACHE_NO_INTERNAL_STORE))
449 * The following should not return 1, otherwise, things are
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 want to
464 * use it in this context.
467 #if 0 /* The client cannot always know when a
468 * session is not appropriate, so we
469 * shouldn't generate an error message. */
471 SSLerr(SSL_F_SSL_GET_PREV_SESSION,
472 SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT);
474 goto err; /* treat like cache miss */
477 if ((s->verify_mode & SSL_VERIFY_PEER) && s->sid_ctx_length == 0) {
479 * We can't be sure if this session is being used out of context,
480 * which is especially important for SSL_VERIFY_PEER. The application
481 * should have used SSL[_CTX]_set_session_id_context. For this error
482 * case, we generate an error instead of treating the event like a
483 * cache miss (otherwise it would be easy for applications to
484 * effectively disable the session cache by accident without anyone
488 SSLerr(SSL_F_SSL_GET_PREV_SESSION,
489 SSL_R_SESSION_ID_CONTEXT_UNINITIALIZED);
494 if (ret->cipher == NULL) {
495 unsigned char buf[5], *p;
501 if ((ret->ssl_version >> 8) >= SSL3_VERSION_MAJOR)
502 ret->cipher = ssl_get_cipher_by_char(s, &(buf[2]));
504 ret->cipher = ssl_get_cipher_by_char(s, &(buf[1]));
505 if (ret->cipher == NULL)
508 #if 0 /* This is way too late. */
511 * If a thread got the session, then 'swaped', and another got it and
512 * then due to a time-out decided to 'OPENSSL_free' it we could be in
513 * trouble. So I'll increment it now, then double decrement later - am I
516 CRYPTO_add(&ret->references, 1, CRYPTO_LOCK_SSL_SESSION);
519 if (ret->timeout < (long)(time(NULL) - ret->time)) { /* timeout */
520 s->ctx->stats.sess_timeout++;
521 /* remove it from the cache */
522 SSL_CTX_remove_session(s->ctx, ret);
526 s->ctx->stats.sess_hit++;
528 /*- ret->time=time(NULL); *//*
532 * again, just leave the session if it is the same session, we have just
533 * incremented and then decremented the reference count :-)
535 if (s->session != NULL)
536 SSL_SESSION_free(s->session);
538 s->verify_result = s->session->verify_result;
543 SSL_SESSION_free(ret);
550 int SSL_CTX_add_session(SSL_CTX *ctx, SSL_SESSION *c)
556 * add just 1 reference count for the SSL_CTX's session cache even though
557 * it has two ways of access: each session is in a doubly linked list and
560 CRYPTO_add(&c->references, 1, CRYPTO_LOCK_SSL_SESSION);
562 * if session c is in already in cache, we take back the increment later
565 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
566 s = (SSL_SESSION *)lh_insert(ctx->sessions, c);
569 * s != NULL iff we already had a session with the given PID. In this
570 * case, s == c should hold (then we did not really modify
571 * ctx->sessions), or we're in trouble.
573 if (s != NULL && s != c) {
574 /* We *are* in trouble ... */
575 SSL_SESSION_list_remove(ctx, s);
578 * ... so pretend the other session did not exist in cache (we cannot
579 * handle two SSL_SESSION structures with identical session ID in the
580 * same cache, which could happen e.g. when two threads concurrently
581 * obtain the same session from an external cache)
586 /* Put at the head of the queue unless it is already in the cache */
588 SSL_SESSION_list_add(ctx, c);
592 * existing cache entry -- decrement previously incremented reference
593 * count because it already takes into account the cache
596 SSL_SESSION_free(s); /* s == c */
600 * new cache entry -- remove old ones if cache has become too large
605 if (SSL_CTX_sess_get_cache_size(ctx) > 0) {
606 while (SSL_CTX_sess_number(ctx) >
607 SSL_CTX_sess_get_cache_size(ctx)) {
608 if (!remove_session_lock(ctx, ctx->session_cache_tail, 0))
611 ctx->stats.sess_cache_full++;
615 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
619 int SSL_CTX_remove_session(SSL_CTX *ctx, SSL_SESSION *c)
621 return remove_session_lock(ctx, c, 1);
624 static int remove_session_lock(SSL_CTX *ctx, SSL_SESSION *c, int lck)
629 if ((c != NULL) && (c->session_id_length != 0)) {
631 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
632 if ((r = (SSL_SESSION *)lh_retrieve(ctx->sessions, c)) == c) {
634 r = (SSL_SESSION *)lh_delete(ctx->sessions, c);
635 SSL_SESSION_list_remove(ctx, c);
639 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
642 r->not_resumable = 1;
643 if (ctx->remove_session_cb != NULL)
644 ctx->remove_session_cb(ctx, r);
652 void SSL_SESSION_free(SSL_SESSION *ss)
659 i = CRYPTO_add(&ss->references, -1, CRYPTO_LOCK_SSL_SESSION);
661 REF_PRINT("SSL_SESSION", ss);
667 fprintf(stderr, "SSL_SESSION_free, bad reference count\n");
672 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_SESSION, ss, &ss->ex_data);
674 OPENSSL_cleanse(ss->key_arg, sizeof ss->key_arg);
675 OPENSSL_cleanse(ss->master_key, sizeof ss->master_key);
676 OPENSSL_cleanse(ss->session_id, sizeof ss->session_id);
677 if (ss->sess_cert != NULL)
678 ssl_sess_cert_free(ss->sess_cert);
679 if (ss->peer != NULL)
681 if (ss->ciphers != NULL)
682 sk_SSL_CIPHER_free(ss->ciphers);
683 #ifndef OPENSSL_NO_TLSEXT
684 if (ss->tlsext_hostname != NULL)
685 OPENSSL_free(ss->tlsext_hostname);
686 if (ss->tlsext_tick != NULL)
687 OPENSSL_free(ss->tlsext_tick);
689 OPENSSL_cleanse(ss, sizeof(*ss));
693 int SSL_set_session(SSL *s, SSL_SESSION *session)
698 if (session != NULL) {
699 meth = s->ctx->method->get_ssl_method(session->ssl_version);
701 meth = s->method->get_ssl_method(session->ssl_version);
703 SSLerr(SSL_F_SSL_SET_SESSION, SSL_R_UNABLE_TO_FIND_SSL_METHOD);
707 if (meth != s->method) {
708 if (!SSL_set_ssl_method(s, meth))
710 if (s->ctx->session_timeout == 0)
711 session->timeout = SSL_get_default_timeout(s);
713 session->timeout = s->ctx->session_timeout;
715 #ifndef OPENSSL_NO_KRB5
716 if (s->kssl_ctx && !s->kssl_ctx->client_princ &&
717 session->krb5_client_princ_len > 0) {
718 s->kssl_ctx->client_princ =
719 (char *)OPENSSL_malloc(session->krb5_client_princ_len + 1);
720 memcpy(s->kssl_ctx->client_princ, session->krb5_client_princ,
721 session->krb5_client_princ_len);
722 s->kssl_ctx->client_princ[session->krb5_client_princ_len] = '\0';
724 #endif /* OPENSSL_NO_KRB5 */
726 /* CRYPTO_w_lock(CRYPTO_LOCK_SSL); */
727 CRYPTO_add(&session->references, 1, CRYPTO_LOCK_SSL_SESSION);
728 if (s->session != NULL)
729 SSL_SESSION_free(s->session);
730 s->session = session;
731 s->verify_result = s->session->verify_result;
732 /* CRYPTO_w_unlock(CRYPTO_LOCK_SSL); */
735 if (s->session != NULL) {
736 SSL_SESSION_free(s->session);
740 meth = s->ctx->method;
741 if (meth != s->method) {
742 if (!SSL_set_ssl_method(s, meth))
750 long SSL_SESSION_set_timeout(SSL_SESSION *s, long t)
758 long SSL_SESSION_get_timeout(const SSL_SESSION *s)
765 long SSL_SESSION_get_time(const SSL_SESSION *s)
772 long SSL_SESSION_set_time(SSL_SESSION *s, long t)
780 long SSL_CTX_set_timeout(SSL_CTX *s, long t)
785 l = s->session_timeout;
786 s->session_timeout = t;
790 long SSL_CTX_get_timeout(const SSL_CTX *s)
794 return (s->session_timeout);
797 typedef struct timeout_param_st {
803 static void timeout(SSL_SESSION *s, TIMEOUT_PARAM *p)
805 if ((p->time == 0) || (p->time > (s->time + s->timeout))) { /* timeout */
807 * The reason we don't call SSL_CTX_remove_session() is to save on
810 lh_delete(p->cache, s);
811 SSL_SESSION_list_remove(p->ctx, s);
812 s->not_resumable = 1;
813 if (p->ctx->remove_session_cb != NULL)
814 p->ctx->remove_session_cb(p->ctx, s);
819 static IMPLEMENT_LHASH_DOALL_ARG_FN(timeout, SSL_SESSION *, TIMEOUT_PARAM *)
821 void SSL_CTX_flush_sessions(SSL_CTX *s, long t)
827 tp.cache = s->sessions;
828 if (tp.cache == NULL)
831 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
832 i = tp.cache->down_load;
833 tp.cache->down_load = 0;
834 lh_doall_arg(tp.cache, LHASH_DOALL_ARG_FN(timeout), &tp);
835 tp.cache->down_load = i;
836 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
839 int ssl_clear_bad_session(SSL *s)
841 if ((s->session != NULL) &&
842 !(s->shutdown & SSL_SENT_SHUTDOWN) &&
843 !(SSL_in_init(s) || SSL_in_before(s))) {
844 SSL_CTX_remove_session(s->ctx, s->session);
850 /* locked by SSL_CTX in the calling function */
851 static void SSL_SESSION_list_remove(SSL_CTX *ctx, SSL_SESSION *s)
853 if ((s->next == NULL) || (s->prev == NULL))
856 if (s->next == (SSL_SESSION *)&(ctx->session_cache_tail)) {
857 /* last element in list */
858 if (s->prev == (SSL_SESSION *)&(ctx->session_cache_head)) {
859 /* only one element in list */
860 ctx->session_cache_head = NULL;
861 ctx->session_cache_tail = NULL;
863 ctx->session_cache_tail = s->prev;
864 s->prev->next = (SSL_SESSION *)&(ctx->session_cache_tail);
867 if (s->prev == (SSL_SESSION *)&(ctx->session_cache_head)) {
868 /* first element in list */
869 ctx->session_cache_head = s->next;
870 s->next->prev = (SSL_SESSION *)&(ctx->session_cache_head);
873 s->next->prev = s->prev;
874 s->prev->next = s->next;
877 s->prev = s->next = NULL;
880 static void SSL_SESSION_list_add(SSL_CTX *ctx, SSL_SESSION *s)
882 if ((s->next != NULL) && (s->prev != NULL))
883 SSL_SESSION_list_remove(ctx, s);
885 if (ctx->session_cache_head == NULL) {
886 ctx->session_cache_head = s;
887 ctx->session_cache_tail = s;
888 s->prev = (SSL_SESSION *)&(ctx->session_cache_head);
889 s->next = (SSL_SESSION *)&(ctx->session_cache_tail);
891 s->next = ctx->session_cache_head;
893 s->prev = (SSL_SESSION *)&(ctx->session_cache_head);
894 ctx->session_cache_head = s;
898 void SSL_CTX_sess_set_new_cb(SSL_CTX *ctx,
899 int (*cb) (struct ssl_st *ssl,
902 ctx->new_session_cb = cb;
905 int (*SSL_CTX_sess_get_new_cb(SSL_CTX *ctx)) (SSL *ssl, SSL_SESSION *sess) {
906 return ctx->new_session_cb;
909 void SSL_CTX_sess_set_remove_cb(SSL_CTX *ctx,
910 void (*cb) (SSL_CTX *ctx, SSL_SESSION *sess))
912 ctx->remove_session_cb = cb;
915 void (*SSL_CTX_sess_get_remove_cb(SSL_CTX *ctx)) (SSL_CTX *ctx,
917 return ctx->remove_session_cb;
920 void SSL_CTX_sess_set_get_cb(SSL_CTX *ctx,
921 SSL_SESSION *(*cb) (struct ssl_st *ssl,
922 unsigned char *data, int len,
925 ctx->get_session_cb = cb;
928 SSL_SESSION *(*SSL_CTX_sess_get_get_cb(SSL_CTX *ctx)) (SSL *ssl,
930 int len, int *copy) {
931 return ctx->get_session_cb;
934 void SSL_CTX_set_info_callback(SSL_CTX *ctx,
935 void (*cb) (const SSL *ssl, int type, int val))
937 ctx->info_callback = cb;
940 void (*SSL_CTX_get_info_callback(SSL_CTX *ctx)) (const SSL *ssl, int type,
942 return ctx->info_callback;
945 void SSL_CTX_set_client_cert_cb(SSL_CTX *ctx,
946 int (*cb) (SSL *ssl, X509 **x509,
949 ctx->client_cert_cb = cb;
952 int (*SSL_CTX_get_client_cert_cb(SSL_CTX *ctx)) (SSL *ssl, X509 **x509,
954 return ctx->client_cert_cb;
957 #ifndef OPENSSL_NO_ENGINE
958 int SSL_CTX_set_client_cert_engine(SSL_CTX *ctx, ENGINE *e)
960 if (!ENGINE_init(e)) {
961 SSLerr(SSL_F_SSL_CTX_SET_CLIENT_CERT_ENGINE, ERR_R_ENGINE_LIB);
964 if (!ENGINE_get_ssl_client_cert_function(e)) {
965 SSLerr(SSL_F_SSL_CTX_SET_CLIENT_CERT_ENGINE,
966 SSL_R_NO_CLIENT_CERT_METHOD);
970 ctx->client_cert_engine = e;
975 void SSL_CTX_set_cookie_generate_cb(SSL_CTX *ctx,
977 unsigned char *cookie,
978 unsigned int *cookie_len))
980 ctx->app_gen_cookie_cb = cb;
983 void SSL_CTX_set_cookie_verify_cb(SSL_CTX *ctx,
984 int (*cb) (SSL *ssl, unsigned char *cookie,
985 unsigned int cookie_len))
987 ctx->app_verify_cookie_cb = cb;