2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to. The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
26 * 1. Redistributions of source code must retain the copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 * must display the following acknowledgement:
33 * "This product includes cryptographic software written by
34 * Eric Young (eay@cryptsoft.com)"
35 * The word 'cryptographic' can be left out if the rouines from the library
36 * being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
58 /* ====================================================================
59 * Copyright (c) 1998-2006 The OpenSSL Project. All rights reserved.
61 * Redistribution and use in source and binary forms, with or without
62 * modification, are permitted provided that the following conditions
65 * 1. Redistributions of source code must retain the above copyright
66 * notice, this list of conditions and the following disclaimer.
68 * 2. Redistributions in binary form must reproduce the above copyright
69 * notice, this list of conditions and the following disclaimer in
70 * the documentation and/or other materials provided with the
73 * 3. All advertising materials mentioning features or use of this
74 * software must display the following acknowledgment:
75 * "This product includes software developed by the OpenSSL Project
76 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
78 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
79 * endorse or promote products derived from this software without
80 * prior written permission. For written permission, please contact
81 * openssl-core@openssl.org.
83 * 5. Products derived from this software may not be called "OpenSSL"
84 * nor may "OpenSSL" appear in their names without prior written
85 * permission of the OpenSSL Project.
87 * 6. Redistributions of any form whatsoever must retain the following
89 * "This product includes software developed by the OpenSSL Project
90 * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
92 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
93 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
94 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
95 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
96 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
97 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
98 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
99 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
100 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
101 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
102 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
103 * OF THE POSSIBILITY OF SUCH DAMAGE.
104 * ====================================================================
106 * This product includes cryptographic software written by Eric Young
107 * (eay@cryptsoft.com). This product includes software written by Tim
108 * Hudson (tjh@cryptsoft.com).
111 /* ====================================================================
112 * Copyright 2005 Nokia. All rights reserved.
114 * The portions of the attached software ("Contribution") is developed by
115 * Nokia Corporation and is licensed pursuant to the OpenSSL open source
118 * The Contribution, originally written by Mika Kousa and Pasi Eronen of
119 * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
120 * support (see RFC 4279) to OpenSSL.
122 * No patent licenses or other rights except those expressly stated in
123 * the OpenSSL open source license shall be deemed granted or received
124 * expressly, by implication, estoppel, or otherwise.
126 * No assurances are provided by Nokia that the Contribution does not
127 * infringe the patent or other intellectual property rights of any third
128 * party or that the license provides you with all the necessary rights
129 * to make use of the Contribution.
131 * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
132 * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
133 * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
134 * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
139 #include <openssl/lhash.h>
140 #include <openssl/rand.h>
141 #ifndef OPENSSL_NO_ENGINE
142 #include <openssl/engine.h>
144 #include "ssl_locl.h"
146 static void SSL_SESSION_list_remove(SSL_CTX *ctx, SSL_SESSION *s);
147 static void SSL_SESSION_list_add(SSL_CTX *ctx,SSL_SESSION *s);
148 static int remove_session_lock(SSL_CTX *ctx, SSL_SESSION *c, int lck);
150 SSL_SESSION *SSL_get_session(const SSL *ssl)
151 /* aka SSL_get0_session; gets 0 objects, just returns a copy of the pointer */
153 return(ssl->session);
156 SSL_SESSION *SSL_get1_session(SSL *ssl)
157 /* variant of SSL_get_session: caller really gets something */
160 /* Need to lock this all up rather than just use CRYPTO_add so that
161 * somebody doesn't free ssl->session between when we check it's
162 * non-null and when we up the reference count. */
163 CRYPTO_w_lock(CRYPTO_LOCK_SSL_SESSION);
167 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_SESSION);
171 int SSL_SESSION_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
172 CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func)
174 return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL_SESSION, argl, argp,
175 new_func, dup_func, free_func);
178 int SSL_SESSION_set_ex_data(SSL_SESSION *s, int idx, void *arg)
180 return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
183 void *SSL_SESSION_get_ex_data(const SSL_SESSION *s, int idx)
185 return(CRYPTO_get_ex_data(&s->ex_data,idx));
188 SSL_SESSION *SSL_SESSION_new(void)
192 ss=(SSL_SESSION *)OPENSSL_malloc(sizeof(SSL_SESSION));
195 SSLerr(SSL_F_SSL_SESSION_NEW,ERR_R_MALLOC_FAILURE);
198 memset(ss,0,sizeof(SSL_SESSION));
200 ss->verify_result = 1; /* avoid 0 (= X509_V_OK) just in case */
202 ss->timeout=60*5+4; /* 5 minute timeout by default */
203 ss->time=(unsigned long)time(NULL);
207 #ifndef OPENSSL_NO_TLSEXT
208 ss->tlsext_hostname = NULL;
209 #ifndef OPENSSL_NO_EC
210 ss->tlsext_ecpointformatlist_length = 0;
211 ss->tlsext_ecpointformatlist = NULL;
212 ss->tlsext_ellipticcurvelist_length = 0;
213 ss->tlsext_ellipticcurvelist = NULL;
216 CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_SESSION, ss, &ss->ex_data);
217 #ifndef OPENSSL_NO_PSK
218 ss->psk_identity_hint=NULL;
219 ss->psk_identity=NULL;
224 const unsigned char *SSL_SESSION_get_id(const SSL_SESSION *s, unsigned int *len)
227 *len = s->session_id_length;
228 return s->session_id;
231 /* Even with SSLv2, we have 16 bytes (128 bits) of session ID space. SSLv3/TLSv1
232 * has 32 bytes (256 bits). As such, filling the ID with random gunk repeatedly
233 * until we have no conflict is going to complete in one iteration pretty much
234 * "most" of the time (btw: understatement). So, if it takes us 10 iterations
235 * and we still can't avoid a conflict - well that's a reasonable point to call
236 * it quits. Either the RAND code is broken or someone is trying to open roughly
237 * very close to 2^128 (or 2^256) SSL sessions to our server. How you might
238 * store that many sessions is perhaps a more interesting question ... */
240 #define MAX_SESS_ID_ATTEMPTS 10
241 static int def_generate_session_id(const SSL *ssl, unsigned char *id,
242 unsigned int *id_len)
244 unsigned int retry = 0;
246 if (RAND_pseudo_bytes(id, *id_len) <= 0)
248 while(SSL_has_matching_session_id(ssl, id, *id_len) &&
249 (++retry < MAX_SESS_ID_ATTEMPTS));
250 if(retry < MAX_SESS_ID_ATTEMPTS)
252 /* else - woops a session_id match */
253 /* XXX We should also check the external cache --
254 * but the probability of a collision is negligible, and
255 * we could not prevent the concurrent creation of sessions
256 * with identical IDs since we currently don't have means
257 * to atomically check whether a session ID already exists
258 * and make a reservation for it if it does not
259 * (this problem applies to the internal cache as well).
264 int ssl_get_new_session(SSL *s, int session)
266 /* This gets used by clients and servers. */
269 SSL_SESSION *ss=NULL;
270 GEN_SESSION_CB cb = def_generate_session_id;
272 if ((ss=SSL_SESSION_new()) == NULL) return(0);
274 /* If the context has a default timeout, use it */
275 if (s->session_ctx->session_timeout == 0)
276 ss->timeout=SSL_get_default_timeout(s);
278 ss->timeout=s->session_ctx->session_timeout;
280 if (s->session != NULL)
282 SSL_SESSION_free(s->session);
288 if (s->version == SSL2_VERSION)
290 ss->ssl_version=SSL2_VERSION;
291 ss->session_id_length=SSL2_SSL_SESSION_ID_LENGTH;
293 else if (s->version == SSL3_VERSION)
295 ss->ssl_version=SSL3_VERSION;
296 ss->session_id_length=SSL3_SSL_SESSION_ID_LENGTH;
298 else if (s->version == TLS1_VERSION)
300 ss->ssl_version=TLS1_VERSION;
301 ss->session_id_length=SSL3_SSL_SESSION_ID_LENGTH;
303 else if (s->version == DTLS1_VERSION)
305 ss->ssl_version=DTLS1_VERSION;
306 ss->session_id_length=SSL3_SSL_SESSION_ID_LENGTH;
310 SSLerr(SSL_F_SSL_GET_NEW_SESSION,SSL_R_UNSUPPORTED_SSL_VERSION);
311 SSL_SESSION_free(ss);
314 #ifndef OPENSSL_NO_TLSEXT
315 /* If RFC4507 ticket use empty session ID */
316 if (s->tlsext_ticket_expected)
318 ss->session_id_length = 0;
322 /* Choose which callback will set the session ID */
323 CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);
324 if(s->generate_session_id)
325 cb = s->generate_session_id;
326 else if(s->session_ctx->generate_session_id)
327 cb = s->session_ctx->generate_session_id;
328 CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
329 /* Choose a session ID */
330 tmp = ss->session_id_length;
331 if(!cb(s, ss->session_id, &tmp))
333 /* The callback failed */
334 SSLerr(SSL_F_SSL_GET_NEW_SESSION,
335 SSL_R_SSL_SESSION_ID_CALLBACK_FAILED);
336 SSL_SESSION_free(ss);
339 /* Don't allow the callback to set the session length to zero.
340 * nor set it higher than it was. */
341 if(!tmp || (tmp > ss->session_id_length))
343 /* The callback set an illegal length */
344 SSLerr(SSL_F_SSL_GET_NEW_SESSION,
345 SSL_R_SSL_SESSION_ID_HAS_BAD_LENGTH);
346 SSL_SESSION_free(ss);
349 /* If the session length was shrunk and we're SSLv2, pad it */
350 if((tmp < ss->session_id_length) && (s->version == SSL2_VERSION))
351 memset(ss->session_id + tmp, 0, ss->session_id_length - tmp);
353 ss->session_id_length = tmp;
354 /* Finally, check for a conflict */
355 if(SSL_has_matching_session_id(s, ss->session_id,
356 ss->session_id_length))
358 SSLerr(SSL_F_SSL_GET_NEW_SESSION,
359 SSL_R_SSL_SESSION_ID_CONFLICT);
360 SSL_SESSION_free(ss);
363 #ifndef OPENSSL_NO_TLSEXT
365 if (s->tlsext_hostname) {
366 ss->tlsext_hostname = BUF_strdup(s->tlsext_hostname);
367 if (ss->tlsext_hostname == NULL) {
368 SSLerr(SSL_F_SSL_GET_NEW_SESSION, ERR_R_INTERNAL_ERROR);
369 SSL_SESSION_free(ss);
373 #ifndef OPENSSL_NO_EC
374 if (s->tlsext_ecpointformatlist)
376 if (ss->tlsext_ecpointformatlist != NULL) OPENSSL_free(ss->tlsext_ecpointformatlist);
377 if ((ss->tlsext_ecpointformatlist = OPENSSL_malloc(s->tlsext_ecpointformatlist_length)) == NULL)
379 SSLerr(SSL_F_SSL_GET_NEW_SESSION, ERR_R_MALLOC_FAILURE);
380 SSL_SESSION_free(ss);
383 ss->tlsext_ecpointformatlist_length = s->tlsext_ecpointformatlist_length;
384 memcpy(ss->tlsext_ecpointformatlist, s->tlsext_ecpointformatlist, s->tlsext_ecpointformatlist_length);
386 if (s->tlsext_ellipticcurvelist)
388 if (ss->tlsext_ellipticcurvelist != NULL) OPENSSL_free(ss->tlsext_ellipticcurvelist);
389 if ((ss->tlsext_ellipticcurvelist = OPENSSL_malloc(s->tlsext_ellipticcurvelist_length)) == NULL)
391 SSLerr(SSL_F_SSL_GET_NEW_SESSION, ERR_R_MALLOC_FAILURE);
392 SSL_SESSION_free(ss);
395 ss->tlsext_ellipticcurvelist_length = s->tlsext_ellipticcurvelist_length;
396 memcpy(ss->tlsext_ellipticcurvelist, s->tlsext_ellipticcurvelist, s->tlsext_ellipticcurvelist_length);
403 ss->session_id_length=0;
406 if (s->sid_ctx_length > sizeof ss->sid_ctx)
408 SSLerr(SSL_F_SSL_GET_NEW_SESSION, ERR_R_INTERNAL_ERROR);
409 SSL_SESSION_free(ss);
412 memcpy(ss->sid_ctx,s->sid_ctx,s->sid_ctx_length);
413 ss->sid_ctx_length=s->sid_ctx_length;
415 ss->ssl_version=s->version;
416 ss->verify_result = X509_V_OK;
421 int ssl_get_prev_session(SSL *s, unsigned char *session_id, int len,
422 const unsigned char *limit)
424 /* This is used only by servers. */
426 SSL_SESSION *ret=NULL;
428 #ifndef OPENSSL_NO_TLSEXT
432 if (len > SSL_MAX_SSL_SESSION_ID_LENGTH)
434 #ifndef OPENSSL_NO_TLSEXT
435 r = tls1_process_ticket(s, session_id, len, limit, &ret);
441 else if (r == 0 || (!ret || !len))
443 else if (!ret && !(s->session_ctx->session_cache_mode & SSL_SESS_CACHE_NO_INTERNAL_LOOKUP))
447 if (!(s->session_ctx->session_cache_mode & SSL_SESS_CACHE_NO_INTERNAL_LOOKUP))
451 data.ssl_version=s->version;
452 data.session_id_length=len;
455 memcpy(data.session_id,session_id,len);
456 CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);
457 ret=lh_SSL_SESSION_retrieve(s->session_ctx->sessions,&data);
459 /* don't allow other threads to steal it: */
460 CRYPTO_add(&ret->references,1,CRYPTO_LOCK_SSL_SESSION);
461 CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
468 s->session_ctx->stats.sess_miss++;
470 if (s->session_ctx->get_session_cb != NULL
471 && (ret=s->session_ctx->get_session_cb(s,session_id,len,©))
474 s->session_ctx->stats.sess_cb_hit++;
476 /* Increment reference count now if the session callback
477 * asks us to do so (note that if the session structures
478 * returned by the callback are shared between threads,
479 * it must handle the reference count itself [i.e. copy == 0],
480 * or things won't be thread-safe). */
482 CRYPTO_add(&ret->references,1,CRYPTO_LOCK_SSL_SESSION);
484 /* Add the externally cached session to the internal
485 * cache as well if and only if we are supposed to. */
486 if(!(s->session_ctx->session_cache_mode & SSL_SESS_CACHE_NO_INTERNAL_STORE))
487 /* The following should not return 1, otherwise,
488 * things are very strange */
489 SSL_CTX_add_session(s->session_ctx,ret);
495 /* Now ret is non-NULL, and we own one of its reference counts. */
497 if (ret->sid_ctx_length != s->sid_ctx_length
498 || memcmp(ret->sid_ctx,s->sid_ctx,ret->sid_ctx_length))
500 /* We've found the session named by the client, but we don't
501 * want to use it in this context. */
503 #if 0 /* The client cannot always know when a session is not appropriate,
504 * so we shouldn't generate an error message. */
506 SSLerr(SSL_F_SSL_GET_PREV_SESSION,SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT);
508 goto err; /* treat like cache miss */
511 if((s->verify_mode & SSL_VERIFY_PEER) && s->sid_ctx_length == 0)
513 /* We can't be sure if this session is being used out of
514 * context, which is especially important for SSL_VERIFY_PEER.
515 * The application should have used SSL[_CTX]_set_session_id_context.
517 * For this error case, we generate an error instead of treating
518 * the event like a cache miss (otherwise it would be easy for
519 * applications to effectively disable the session cache by
520 * accident without anyone noticing).
523 SSLerr(SSL_F_SSL_GET_PREV_SESSION,SSL_R_SESSION_ID_CONTEXT_UNINITIALIZED);
528 if (ret->cipher == NULL)
530 unsigned char buf[5],*p;
536 if ((ret->ssl_version>>8) == SSL3_VERSION_MAJOR)
537 ret->cipher=ssl_get_cipher_by_char(s,&(buf[2]));
539 ret->cipher=ssl_get_cipher_by_char(s,&(buf[1]));
540 if (ret->cipher == NULL)
545 #if 0 /* This is way too late. */
547 /* If a thread got the session, then 'swaped', and another got
548 * it and then due to a time-out decided to 'OPENSSL_free' it we could
549 * be in trouble. So I'll increment it now, then double decrement
550 * later - am I speaking rubbish?. */
551 CRYPTO_add(&ret->references,1,CRYPTO_LOCK_SSL_SESSION);
554 if (ret->timeout < (long)(time(NULL) - ret->time)) /* timeout */
556 s->session_ctx->stats.sess_timeout++;
557 /* remove it from the cache */
558 SSL_CTX_remove_session(s->session_ctx,ret);
562 s->session_ctx->stats.sess_hit++;
564 /* ret->time=time(NULL); */ /* rezero timeout? */
565 /* again, just leave the session
566 * if it is the same session, we have just incremented and
567 * then decremented the reference count :-) */
568 if (s->session != NULL)
569 SSL_SESSION_free(s->session);
571 s->verify_result = s->session->verify_result;
576 SSL_SESSION_free(ret);
583 int SSL_CTX_add_session(SSL_CTX *ctx, SSL_SESSION *c)
588 /* add just 1 reference count for the SSL_CTX's session cache
589 * even though it has two ways of access: each session is in a
590 * doubly linked list and an lhash */
591 CRYPTO_add(&c->references,1,CRYPTO_LOCK_SSL_SESSION);
592 /* if session c is in already in cache, we take back the increment later */
594 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
595 s=lh_SSL_SESSION_insert(ctx->sessions,c);
597 /* s != NULL iff we already had a session with the given PID.
598 * In this case, s == c should hold (then we did not really modify
599 * ctx->sessions), or we're in trouble. */
600 if (s != NULL && s != c)
602 /* We *are* in trouble ... */
603 SSL_SESSION_list_remove(ctx,s);
605 /* ... so pretend the other session did not exist in cache
606 * (we cannot handle two SSL_SESSION structures with identical
607 * session ID in the same cache, which could happen e.g. when
608 * two threads concurrently obtain the same session from an external
613 /* Put at the head of the queue unless it is already in the cache */
615 SSL_SESSION_list_add(ctx,c);
619 /* existing cache entry -- decrement previously incremented reference
620 * count because it already takes into account the cache */
622 SSL_SESSION_free(s); /* s == c */
627 /* new cache entry -- remove old ones if cache has become too large */
631 if (SSL_CTX_sess_get_cache_size(ctx) > 0)
633 while (SSL_CTX_sess_number(ctx) >
634 SSL_CTX_sess_get_cache_size(ctx))
636 if (!remove_session_lock(ctx,
637 ctx->session_cache_tail, 0))
640 ctx->stats.sess_cache_full++;
644 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
648 int SSL_CTX_remove_session(SSL_CTX *ctx, SSL_SESSION *c)
650 return remove_session_lock(ctx, c, 1);
653 static int remove_session_lock(SSL_CTX *ctx, SSL_SESSION *c, int lck)
658 if ((c != NULL) && (c->session_id_length != 0))
660 if(lck) CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
661 if ((r = lh_SSL_SESSION_retrieve(ctx->sessions,c)) == c)
664 r=lh_SSL_SESSION_delete(ctx->sessions,c);
665 SSL_SESSION_list_remove(ctx,c);
668 if(lck) CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
673 if (ctx->remove_session_cb != NULL)
674 ctx->remove_session_cb(ctx,r);
683 void SSL_SESSION_free(SSL_SESSION *ss)
690 i=CRYPTO_add(&ss->references,-1,CRYPTO_LOCK_SSL_SESSION);
692 REF_PRINT("SSL_SESSION",ss);
698 fprintf(stderr,"SSL_SESSION_free, bad reference count\n");
703 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_SESSION, ss, &ss->ex_data);
705 OPENSSL_cleanse(ss->key_arg,sizeof ss->key_arg);
706 OPENSSL_cleanse(ss->master_key,sizeof ss->master_key);
707 OPENSSL_cleanse(ss->session_id,sizeof ss->session_id);
708 if (ss->sess_cert != NULL) ssl_sess_cert_free(ss->sess_cert);
709 if (ss->peer != NULL) X509_free(ss->peer);
710 if (ss->ciphers != NULL) sk_SSL_CIPHER_free(ss->ciphers);
711 #ifndef OPENSSL_NO_TLSEXT
712 if (ss->tlsext_hostname != NULL) OPENSSL_free(ss->tlsext_hostname);
713 if (ss->tlsext_tick != NULL) OPENSSL_free(ss->tlsext_tick);
714 #ifndef OPENSSL_NO_EC
715 ss->tlsext_ecpointformatlist_length = 0;
716 if (ss->tlsext_ecpointformatlist != NULL) OPENSSL_free(ss->tlsext_ecpointformatlist);
717 ss->tlsext_ellipticcurvelist_length = 0;
718 if (ss->tlsext_ellipticcurvelist != NULL) OPENSSL_free(ss->tlsext_ellipticcurvelist);
719 #endif /* OPENSSL_NO_EC */
721 #ifndef OPENSSL_NO_PSK
722 if (ss->psk_identity_hint != NULL)
723 OPENSSL_free(ss->psk_identity_hint);
724 if (ss->psk_identity != NULL)
725 OPENSSL_free(ss->psk_identity);
727 OPENSSL_cleanse(ss,sizeof(*ss));
731 int SSL_set_session(SSL *s, SSL_SESSION *session)
734 const SSL_METHOD *meth;
738 meth=s->ctx->method->get_ssl_method(session->ssl_version);
740 meth=s->method->get_ssl_method(session->ssl_version);
743 SSLerr(SSL_F_SSL_SET_SESSION,SSL_R_UNABLE_TO_FIND_SSL_METHOD);
747 if (meth != s->method)
749 if (!SSL_set_ssl_method(s,meth))
751 if (s->ctx->session_timeout == 0)
752 session->timeout=SSL_get_default_timeout(s);
754 session->timeout=s->ctx->session_timeout;
757 #ifndef OPENSSL_NO_KRB5
758 if (s->kssl_ctx && !s->kssl_ctx->client_princ &&
759 session->krb5_client_princ_len > 0)
761 s->kssl_ctx->client_princ = (char *)OPENSSL_malloc(session->krb5_client_princ_len + 1);
762 memcpy(s->kssl_ctx->client_princ,session->krb5_client_princ,
763 session->krb5_client_princ_len);
764 s->kssl_ctx->client_princ[session->krb5_client_princ_len] = '\0';
766 #endif /* OPENSSL_NO_KRB5 */
768 /* CRYPTO_w_lock(CRYPTO_LOCK_SSL);*/
769 CRYPTO_add(&session->references,1,CRYPTO_LOCK_SSL_SESSION);
770 if (s->session != NULL)
771 SSL_SESSION_free(s->session);
773 s->verify_result = s->session->verify_result;
774 /* CRYPTO_w_unlock(CRYPTO_LOCK_SSL);*/
779 if (s->session != NULL)
781 SSL_SESSION_free(s->session);
786 if (meth != s->method)
788 if (!SSL_set_ssl_method(s,meth))
796 long SSL_SESSION_set_timeout(SSL_SESSION *s, long t)
798 if (s == NULL) return(0);
803 long SSL_SESSION_get_timeout(const SSL_SESSION *s)
805 if (s == NULL) return(0);
809 long SSL_SESSION_get_time(const SSL_SESSION *s)
811 if (s == NULL) return(0);
815 long SSL_SESSION_set_time(SSL_SESSION *s, long t)
817 if (s == NULL) return(0);
822 long SSL_CTX_set_timeout(SSL_CTX *s, long t)
825 if (s == NULL) return(0);
826 l=s->session_timeout;
827 s->session_timeout=t;
831 long SSL_CTX_get_timeout(const SSL_CTX *s)
833 if (s == NULL) return(0);
834 return(s->session_timeout);
837 typedef struct timeout_param_st
841 LHASH_OF(SSL_SESSION) *cache;
844 static void timeout_doall_arg(SSL_SESSION *s, TIMEOUT_PARAM *p)
846 if ((p->time == 0) || (p->time > (s->time+s->timeout))) /* timeout */
848 /* The reason we don't call SSL_CTX_remove_session() is to
849 * save on locking overhead */
850 (void)lh_SSL_SESSION_delete(p->cache,s);
851 SSL_SESSION_list_remove(p->ctx,s);
853 if (p->ctx->remove_session_cb != NULL)
854 p->ctx->remove_session_cb(p->ctx,s);
859 static IMPLEMENT_LHASH_DOALL_ARG_FN(timeout, SSL_SESSION, TIMEOUT_PARAM)
861 void SSL_CTX_flush_sessions(SSL_CTX *s, long t)
867 tp.cache=s->sessions;
868 if (tp.cache == NULL) return;
870 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
871 i=CHECKED_LHASH_OF(SSL_SESSION, tp.cache)->down_load;
872 CHECKED_LHASH_OF(SSL_SESSION, tp.cache)->down_load=0;
873 lh_SSL_SESSION_doall_arg(tp.cache, LHASH_DOALL_ARG_FN(timeout),
875 CHECKED_LHASH_OF(SSL_SESSION, tp.cache)->down_load=i;
876 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
879 int ssl_clear_bad_session(SSL *s)
881 if ( (s->session != NULL) &&
882 !(s->shutdown & SSL_SENT_SHUTDOWN) &&
883 !(SSL_in_init(s) || SSL_in_before(s)))
885 SSL_CTX_remove_session(s->ctx,s->session);
892 /* locked by SSL_CTX in the calling function */
893 static void SSL_SESSION_list_remove(SSL_CTX *ctx, SSL_SESSION *s)
895 if ((s->next == NULL) || (s->prev == NULL)) return;
897 if (s->next == (SSL_SESSION *)&(ctx->session_cache_tail))
898 { /* last element in list */
899 if (s->prev == (SSL_SESSION *)&(ctx->session_cache_head))
900 { /* only one element in list */
901 ctx->session_cache_head=NULL;
902 ctx->session_cache_tail=NULL;
906 ctx->session_cache_tail=s->prev;
907 s->prev->next=(SSL_SESSION *)&(ctx->session_cache_tail);
912 if (s->prev == (SSL_SESSION *)&(ctx->session_cache_head))
913 { /* first element in list */
914 ctx->session_cache_head=s->next;
915 s->next->prev=(SSL_SESSION *)&(ctx->session_cache_head);
918 { /* middle of list */
919 s->next->prev=s->prev;
920 s->prev->next=s->next;
923 s->prev=s->next=NULL;
926 static void SSL_SESSION_list_add(SSL_CTX *ctx, SSL_SESSION *s)
928 if ((s->next != NULL) && (s->prev != NULL))
929 SSL_SESSION_list_remove(ctx,s);
931 if (ctx->session_cache_head == NULL)
933 ctx->session_cache_head=s;
934 ctx->session_cache_tail=s;
935 s->prev=(SSL_SESSION *)&(ctx->session_cache_head);
936 s->next=(SSL_SESSION *)&(ctx->session_cache_tail);
940 s->next=ctx->session_cache_head;
942 s->prev=(SSL_SESSION *)&(ctx->session_cache_head);
943 ctx->session_cache_head=s;
947 void SSL_CTX_sess_set_new_cb(SSL_CTX *ctx,
948 int (*cb)(struct ssl_st *ssl,SSL_SESSION *sess))
950 ctx->new_session_cb=cb;
953 int (*SSL_CTX_sess_get_new_cb(SSL_CTX *ctx))(SSL *ssl, SSL_SESSION *sess)
955 return ctx->new_session_cb;
958 void SSL_CTX_sess_set_remove_cb(SSL_CTX *ctx,
959 void (*cb)(SSL_CTX *ctx,SSL_SESSION *sess))
961 ctx->remove_session_cb=cb;
964 void (*SSL_CTX_sess_get_remove_cb(SSL_CTX *ctx))(SSL_CTX * ctx,SSL_SESSION *sess)
966 return ctx->remove_session_cb;
969 void SSL_CTX_sess_set_get_cb(SSL_CTX *ctx,
970 SSL_SESSION *(*cb)(struct ssl_st *ssl,
971 unsigned char *data,int len,int *copy))
973 ctx->get_session_cb=cb;
976 SSL_SESSION * (*SSL_CTX_sess_get_get_cb(SSL_CTX *ctx))(SSL *ssl,
977 unsigned char *data,int len,int *copy)
979 return ctx->get_session_cb;
982 void SSL_CTX_set_info_callback(SSL_CTX *ctx,
983 void (*cb)(const SSL *ssl,int type,int val))
985 ctx->info_callback=cb;
988 void (*SSL_CTX_get_info_callback(SSL_CTX *ctx))(const SSL *ssl,int type,int val)
990 return ctx->info_callback;
993 void SSL_CTX_set_client_cert_cb(SSL_CTX *ctx,
994 int (*cb)(SSL *ssl, X509 **x509, EVP_PKEY **pkey))
996 ctx->client_cert_cb=cb;
999 int (*SSL_CTX_get_client_cert_cb(SSL_CTX *ctx))(SSL * ssl, X509 ** x509 , EVP_PKEY **pkey)
1001 return ctx->client_cert_cb;
1004 #ifndef OPENSSL_NO_ENGINE
1005 int SSL_CTX_set_client_cert_engine(SSL_CTX *ctx, ENGINE *e)
1007 if (!ENGINE_init(e))
1009 SSLerr(SSL_F_SSL_CTX_SET_CLIENT_CERT_ENGINE, ERR_R_ENGINE_LIB);
1012 if(!ENGINE_get_ssl_client_cert_function(e))
1014 SSLerr(SSL_F_SSL_CTX_SET_CLIENT_CERT_ENGINE, SSL_R_NO_CLIENT_CERT_METHOD);
1018 ctx->client_cert_engine = e;
1023 void SSL_CTX_set_cookie_generate_cb(SSL_CTX *ctx,
1024 int (*cb)(SSL *ssl, unsigned char *cookie, unsigned int *cookie_len))
1026 ctx->app_gen_cookie_cb=cb;
1029 void SSL_CTX_set_cookie_verify_cb(SSL_CTX *ctx,
1030 int (*cb)(SSL *ssl, unsigned char *cookie, unsigned int cookie_len))
1032 ctx->app_verify_cookie_cb=cb;
1035 IMPLEMENT_PEM_rw(SSL_SESSION, SSL_SESSION, PEM_STRING_SSL_SESSION, SSL_SESSION)