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diff --git a/src/lib/libssl/ssl_sess.c b/src/lib/libssl/ssl_sess.c
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1/* ssl/ssl_sess.c */
2/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 * All rights reserved.
4 *
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.
8 *
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).
15 *
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.
22 *
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
25 * are met:
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)"
40 *
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
51 * SUCH DAMAGE.
52 *
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.]
57 */
58
59#include <stdio.h>
60#include <openssl/lhash.h>
61#include <openssl/rand.h>
62#include "ssl_locl.h"
63
64static void SSL_SESSION_list_remove(SSL_CTX *ctx, SSL_SESSION *s);
65static void SSL_SESSION_list_add(SSL_CTX *ctx,SSL_SESSION *s);
66static int remove_session_lock(SSL_CTX *ctx, SSL_SESSION *c, int lck);
67
68SSL_SESSION *SSL_get_session(const SSL *ssl)
69/* aka SSL_get0_session; gets 0 objects, just returns a copy of the pointer */
70 {
71 return(ssl->session);
72 }
73
74SSL_SESSION *SSL_get1_session(SSL *ssl)
75/* variant of SSL_get_session: caller really gets something */
76 {
77 SSL_SESSION *sess;
78 /* Need to lock this all up rather than just use CRYPTO_add so that
79 * somebody doesn't free ssl->session between when we check it's
80 * non-null and when we up the reference count. */
81 CRYPTO_w_lock(CRYPTO_LOCK_SSL_SESSION);
82 sess = ssl->session;
83 if(sess)
84 sess->references++;
85 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_SESSION);
86 return(sess);
87 }
88
89int SSL_SESSION_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
90 CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func)
91 {
92 return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL_SESSION, argl, argp,
93 new_func, dup_func, free_func);
94 }
95
96int SSL_SESSION_set_ex_data(SSL_SESSION *s, int idx, void *arg)
97 {
98 return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
99 }
100
101void *SSL_SESSION_get_ex_data(const SSL_SESSION *s, int idx)
102 {
103 return(CRYPTO_get_ex_data(&s->ex_data,idx));
104 }
105
106SSL_SESSION *SSL_SESSION_new(void)
107 {
108 SSL_SESSION *ss;
109
110 ss=(SSL_SESSION *)OPENSSL_malloc(sizeof(SSL_SESSION));
111 if (ss == NULL)
112 {
113 SSLerr(SSL_F_SSL_SESSION_NEW,ERR_R_MALLOC_FAILURE);
114 return(0);
115 }
116 memset(ss,0,sizeof(SSL_SESSION));
117
118 ss->verify_result = 1; /* avoid 0 (= X509_V_OK) just in case */
119 ss->references=1;
120 ss->timeout=60*5+4; /* 5 minute timeout by default */
121 ss->time=(unsigned long)time(NULL);
122 ss->prev=NULL;
123 ss->next=NULL;
124 ss->compress_meth=0;
125 CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_SESSION, ss, &ss->ex_data);
126 return(ss);
127 }
128
129/* Even with SSLv2, we have 16 bytes (128 bits) of session ID space. SSLv3/TLSv1
130 * has 32 bytes (256 bits). As such, filling the ID with random gunk repeatedly
131 * until we have no conflict is going to complete in one iteration pretty much
132 * "most" of the time (btw: understatement). So, if it takes us 10 iterations
133 * and we still can't avoid a conflict - well that's a reasonable point to call
134 * it quits. Either the RAND code is broken or someone is trying to open roughly
135 * very close to 2^128 (or 2^256) SSL sessions to our server. How you might
136 * store that many sessions is perhaps a more interesting question ... */
137
138#define MAX_SESS_ID_ATTEMPTS 10
139static int def_generate_session_id(const SSL *ssl, unsigned char *id,
140 unsigned int *id_len)
141{
142 unsigned int retry = 0;
143 do
144 if(RAND_pseudo_bytes(id, *id_len) <= 0)
145 return 0;
146 while(SSL_has_matching_session_id(ssl, id, *id_len) &&
147 (++retry < MAX_SESS_ID_ATTEMPTS));
148 if(retry < MAX_SESS_ID_ATTEMPTS)
149 return 1;
150 /* else - woops a session_id match */
151 /* XXX We should also check the external cache --
152 * but the probability of a collision is negligible, and
153 * we could not prevent the concurrent creation of sessions
154 * with identical IDs since we currently don't have means
155 * to atomically check whether a session ID already exists
156 * and make a reservation for it if it does not
157 * (this problem applies to the internal cache as well).
158 */
159 return 0;
160}
161
162int ssl_get_new_session(SSL *s, int session)
163 {
164 /* This gets used by clients and servers. */
165
166 unsigned int tmp;
167 SSL_SESSION *ss=NULL;
168 GEN_SESSION_CB cb = def_generate_session_id;
169
170 if ((ss=SSL_SESSION_new()) == NULL) return(0);
171
172 /* If the context has a default timeout, use it */
173 if (s->ctx->session_timeout == 0)
174 ss->timeout=SSL_get_default_timeout(s);
175 else
176 ss->timeout=s->ctx->session_timeout;
177
178 if (s->session != NULL)
179 {
180 SSL_SESSION_free(s->session);
181 s->session=NULL;
182 }
183
184 if (session)
185 {
186 if (s->version == SSL2_VERSION)
187 {
188 ss->ssl_version=SSL2_VERSION;
189 ss->session_id_length=SSL2_SSL_SESSION_ID_LENGTH;
190 }
191 else if (s->version == SSL3_VERSION)
192 {
193 ss->ssl_version=SSL3_VERSION;
194 ss->session_id_length=SSL3_SSL_SESSION_ID_LENGTH;
195 }
196 else if (s->version == TLS1_VERSION)
197 {
198 ss->ssl_version=TLS1_VERSION;
199 ss->session_id_length=SSL3_SSL_SESSION_ID_LENGTH;
200 }
201 else
202 {
203 SSLerr(SSL_F_SSL_GET_NEW_SESSION,SSL_R_UNSUPPORTED_SSL_VERSION);
204 SSL_SESSION_free(ss);
205 return(0);
206 }
207 /* Choose which callback will set the session ID */
208 CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);
209 if(s->generate_session_id)
210 cb = s->generate_session_id;
211 else if(s->ctx->generate_session_id)
212 cb = s->ctx->generate_session_id;
213 CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
214 /* Choose a session ID */
215 tmp = ss->session_id_length;
216 if(!cb(s, ss->session_id, &tmp))
217 {
218 /* The callback failed */
219 SSLerr(SSL_F_SSL_GET_NEW_SESSION,
220 SSL_R_SSL_SESSION_ID_CALLBACK_FAILED);
221 SSL_SESSION_free(ss);
222 return(0);
223 }
224 /* Don't allow the callback to set the session length to zero.
225 * nor set it higher than it was. */
226 if(!tmp || (tmp > ss->session_id_length))
227 {
228 /* The callback set an illegal length */
229 SSLerr(SSL_F_SSL_GET_NEW_SESSION,
230 SSL_R_SSL_SESSION_ID_HAS_BAD_LENGTH);
231 SSL_SESSION_free(ss);
232 return(0);
233 }
234 /* If the session length was shrunk and we're SSLv2, pad it */
235 if((tmp < ss->session_id_length) && (s->version == SSL2_VERSION))
236 memset(ss->session_id + tmp, 0, ss->session_id_length - tmp);
237 else
238 ss->session_id_length = tmp;
239 /* Finally, check for a conflict */
240 if(SSL_has_matching_session_id(s, ss->session_id,
241 ss->session_id_length))
242 {
243 SSLerr(SSL_F_SSL_GET_NEW_SESSION,
244 SSL_R_SSL_SESSION_ID_CONFLICT);
245 SSL_SESSION_free(ss);
246 return(0);
247 }
248 }
249 else
250 {
251 ss->session_id_length=0;
252 }
253
254 if (s->sid_ctx_length > sizeof ss->sid_ctx)
255 {
256 SSLerr(SSL_F_SSL_GET_NEW_SESSION, ERR_R_INTERNAL_ERROR);
257 SSL_SESSION_free(ss);
258 return 0;
259 }
260 memcpy(ss->sid_ctx,s->sid_ctx,s->sid_ctx_length);
261 ss->sid_ctx_length=s->sid_ctx_length;
262 s->session=ss;
263 ss->ssl_version=s->version;
264 ss->verify_result = X509_V_OK;
265
266 return(1);
267 }
268
269int ssl_get_prev_session(SSL *s, unsigned char *session_id, int len)
270 {
271 /* This is used only by servers. */
272
273 SSL_SESSION *ret=NULL,data;
274 int fatal = 0;
275
276 data.ssl_version=s->version;
277 data.session_id_length=len;
278 if (len > SSL_MAX_SSL_SESSION_ID_LENGTH)
279 goto err;
280 memcpy(data.session_id,session_id,len);
281
282 if (!(s->ctx->session_cache_mode & SSL_SESS_CACHE_NO_INTERNAL_LOOKUP))
283 {
284 CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);
285 ret=(SSL_SESSION *)lh_retrieve(s->ctx->sessions,&data);
286 if (ret != NULL)
287 /* don't allow other threads to steal it: */
288 CRYPTO_add(&ret->references,1,CRYPTO_LOCK_SSL_SESSION);
289 CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
290 }
291
292 if (ret == NULL)
293 {
294 int copy=1;
295
296 s->ctx->stats.sess_miss++;
297 ret=NULL;
298 if (s->ctx->get_session_cb != NULL
299 && (ret=s->ctx->get_session_cb(s,session_id,len,&copy))
300 != NULL)
301 {
302 s->ctx->stats.sess_cb_hit++;
303
304 /* Increment reference count now if the session callback
305 * asks us to do so (note that if the session structures
306 * returned by the callback are shared between threads,
307 * it must handle the reference count itself [i.e. copy == 0],
308 * or things won't be thread-safe). */
309 if (copy)
310 CRYPTO_add(&ret->references,1,CRYPTO_LOCK_SSL_SESSION);
311
312 /* Add the externally cached session to the internal
313 * cache as well if and only if we are supposed to. */
314 if(!(s->ctx->session_cache_mode & SSL_SESS_CACHE_NO_INTERNAL_STORE))
315 /* The following should not return 1, otherwise,
316 * things are very strange */
317 SSL_CTX_add_session(s->ctx,ret);
318 }
319 if (ret == NULL)
320 goto err;
321 }
322
323 /* Now ret is non-NULL, and we own one of its reference counts. */
324
325 if((s->verify_mode&SSL_VERIFY_PEER)
326 && (!s->sid_ctx_length || ret->sid_ctx_length != s->sid_ctx_length
327 || memcmp(ret->sid_ctx,s->sid_ctx,ret->sid_ctx_length)))
328 {
329 /* We've found the session named by the client, but we don't
330 * want to use it in this context. */
331
332 if (s->sid_ctx_length == 0)
333 {
334 /* application should have used SSL[_CTX]_set_session_id_context
335 * -- we could tolerate this and just pretend we never heard
336 * of this session, but then applications could effectively
337 * disable the session cache by accident without anyone noticing */
338
339 SSLerr(SSL_F_SSL_GET_PREV_SESSION,SSL_R_SESSION_ID_CONTEXT_UNINITIALIZED);
340 fatal = 1;
341 goto err;
342 }
343 else
344 {
345#if 0 /* The client cannot always know when a session is not appropriate,
346 * so we shouldn't generate an error message. */
347
348 SSLerr(SSL_F_SSL_GET_PREV_SESSION,SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT);
349#endif
350 goto err; /* treat like cache miss */
351 }
352 }
353
354 if (ret->cipher == NULL)
355 {
356 unsigned char buf[5],*p;
357 unsigned long l;
358
359 p=buf;
360 l=ret->cipher_id;
361 l2n(l,p);
362 if ((ret->ssl_version>>8) == SSL3_VERSION_MAJOR)
363 ret->cipher=ssl_get_cipher_by_char(s,&(buf[2]));
364 else
365 ret->cipher=ssl_get_cipher_by_char(s,&(buf[1]));
366 if (ret->cipher == NULL)
367 goto err;
368 }
369
370
371#if 0 /* This is way too late. */
372
373 /* If a thread got the session, then 'swaped', and another got
374 * it and then due to a time-out decided to 'OPENSSL_free' it we could
375 * be in trouble. So I'll increment it now, then double decrement
376 * later - am I speaking rubbish?. */
377 CRYPTO_add(&ret->references,1,CRYPTO_LOCK_SSL_SESSION);
378#endif
379
380 if (ret->timeout < (long)(time(NULL) - ret->time)) /* timeout */
381 {
382 s->ctx->stats.sess_timeout++;
383 /* remove it from the cache */
384 SSL_CTX_remove_session(s->ctx,ret);
385 goto err;
386 }
387
388 s->ctx->stats.sess_hit++;
389
390 /* ret->time=time(NULL); */ /* rezero timeout? */
391 /* again, just leave the session
392 * if it is the same session, we have just incremented and
393 * then decremented the reference count :-) */
394 if (s->session != NULL)
395 SSL_SESSION_free(s->session);
396 s->session=ret;
397 s->verify_result = s->session->verify_result;
398 return(1);
399
400 err:
401 if (ret != NULL)
402 SSL_SESSION_free(ret);
403 if (fatal)
404 return -1;
405 else
406 return 0;
407 }
408
409int SSL_CTX_add_session(SSL_CTX *ctx, SSL_SESSION *c)
410 {
411 int ret=0;
412 SSL_SESSION *s;
413
414 /* add just 1 reference count for the SSL_CTX's session cache
415 * even though it has two ways of access: each session is in a
416 * doubly linked list and an lhash */
417 CRYPTO_add(&c->references,1,CRYPTO_LOCK_SSL_SESSION);
418 /* if session c is in already in cache, we take back the increment later */
419
420 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
421 s=(SSL_SESSION *)lh_insert(ctx->sessions,c);
422
423 /* s != NULL iff we already had a session with the given PID.
424 * In this case, s == c should hold (then we did not really modify
425 * ctx->sessions), or we're in trouble. */
426 if (s != NULL && s != c)
427 {
428 /* We *are* in trouble ... */
429 SSL_SESSION_list_remove(ctx,s);
430 SSL_SESSION_free(s);
431 /* ... so pretend the other session did not exist in cache
432 * (we cannot handle two SSL_SESSION structures with identical
433 * session ID in the same cache, which could happen e.g. when
434 * two threads concurrently obtain the same session from an external
435 * cache) */
436 s = NULL;
437 }
438
439 /* Put at the head of the queue unless it is already in the cache */
440 if (s == NULL)
441 SSL_SESSION_list_add(ctx,c);
442
443 if (s != NULL)
444 {
445 /* existing cache entry -- decrement previously incremented reference
446 * count because it already takes into account the cache */
447
448 SSL_SESSION_free(s); /* s == c */
449 ret=0;
450 }
451 else
452 {
453 /* new cache entry -- remove old ones if cache has become too large */
454
455 ret=1;
456
457 if (SSL_CTX_sess_get_cache_size(ctx) > 0)
458 {
459 while (SSL_CTX_sess_number(ctx) >
460 SSL_CTX_sess_get_cache_size(ctx))
461 {
462 if (!remove_session_lock(ctx,
463 ctx->session_cache_tail, 0))
464 break;
465 else
466 ctx->stats.sess_cache_full++;
467 }
468 }
469 }
470 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
471 return(ret);
472 }
473
474int SSL_CTX_remove_session(SSL_CTX *ctx, SSL_SESSION *c)
475{
476 return remove_session_lock(ctx, c, 1);
477}
478
479static int remove_session_lock(SSL_CTX *ctx, SSL_SESSION *c, int lck)
480 {
481 SSL_SESSION *r;
482 int ret=0;
483
484 if ((c != NULL) && (c->session_id_length != 0))
485 {
486 if(lck) CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
487 if ((r = (SSL_SESSION *)lh_retrieve(ctx->sessions,c)) == c)
488 {
489 ret=1;
490 r=(SSL_SESSION *)lh_delete(ctx->sessions,c);
491 SSL_SESSION_list_remove(ctx,c);
492 }
493
494 if(lck) CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
495
496 if (ret)
497 {
498 r->not_resumable=1;
499 if (ctx->remove_session_cb != NULL)
500 ctx->remove_session_cb(ctx,r);
501 SSL_SESSION_free(r);
502 }
503 }
504 else
505 ret=0;
506 return(ret);
507 }
508
509void SSL_SESSION_free(SSL_SESSION *ss)
510 {
511 int i;
512
513 if(ss == NULL)
514 return;
515
516 i=CRYPTO_add(&ss->references,-1,CRYPTO_LOCK_SSL_SESSION);
517#ifdef REF_PRINT
518 REF_PRINT("SSL_SESSION",ss);
519#endif
520 if (i > 0) return;
521#ifdef REF_CHECK
522 if (i < 0)
523 {
524 fprintf(stderr,"SSL_SESSION_free, bad reference count\n");
525 abort(); /* ok */
526 }
527#endif
528
529 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_SESSION, ss, &ss->ex_data);
530
531 OPENSSL_cleanse(ss->key_arg,sizeof ss->key_arg);
532 OPENSSL_cleanse(ss->master_key,sizeof ss->master_key);
533 OPENSSL_cleanse(ss->session_id,sizeof ss->session_id);
534 if (ss->sess_cert != NULL) ssl_sess_cert_free(ss->sess_cert);
535 if (ss->peer != NULL) X509_free(ss->peer);
536 if (ss->ciphers != NULL) sk_SSL_CIPHER_free(ss->ciphers);
537 OPENSSL_cleanse(ss,sizeof(*ss));
538 OPENSSL_free(ss);
539 }
540
541int SSL_set_session(SSL *s, SSL_SESSION *session)
542 {
543 int ret=0;
544 SSL_METHOD *meth;
545
546 if (session != NULL)
547 {
548 meth=s->ctx->method->get_ssl_method(session->ssl_version);
549 if (meth == NULL)
550 meth=s->method->get_ssl_method(session->ssl_version);
551 if (meth == NULL)
552 {
553 SSLerr(SSL_F_SSL_SET_SESSION,SSL_R_UNABLE_TO_FIND_SSL_METHOD);
554 return(0);
555 }
556
557 if (meth != s->method)
558 {
559 if (!SSL_set_ssl_method(s,meth))
560 return(0);
561 if (s->ctx->session_timeout == 0)
562 session->timeout=SSL_get_default_timeout(s);
563 else
564 session->timeout=s->ctx->session_timeout;
565 }
566
567#ifndef OPENSSL_NO_KRB5
568 if (s->kssl_ctx && !s->kssl_ctx->client_princ &&
569 session->krb5_client_princ_len > 0)
570 {
571 s->kssl_ctx->client_princ = (char *)malloc(session->krb5_client_princ_len + 1);
572 memcpy(s->kssl_ctx->client_princ,session->krb5_client_princ,
573 session->krb5_client_princ_len);
574 s->kssl_ctx->client_princ[session->krb5_client_princ_len] = '\0';
575 }
576#endif /* OPENSSL_NO_KRB5 */
577
578 /* CRYPTO_w_lock(CRYPTO_LOCK_SSL);*/
579 CRYPTO_add(&session->references,1,CRYPTO_LOCK_SSL_SESSION);
580 if (s->session != NULL)
581 SSL_SESSION_free(s->session);
582 s->session=session;
583 s->verify_result = s->session->verify_result;
584 /* CRYPTO_w_unlock(CRYPTO_LOCK_SSL);*/
585 ret=1;
586 }
587 else
588 {
589 if (s->session != NULL)
590 {
591 SSL_SESSION_free(s->session);
592 s->session=NULL;
593 }
594
595 meth=s->ctx->method;
596 if (meth != s->method)
597 {
598 if (!SSL_set_ssl_method(s,meth))
599 return(0);
600 }
601 ret=1;
602 }
603 return(ret);
604 }
605
606long SSL_SESSION_set_timeout(SSL_SESSION *s, long t)
607 {
608 if (s == NULL) return(0);
609 s->timeout=t;
610 return(1);
611 }
612
613long SSL_SESSION_get_timeout(const SSL_SESSION *s)
614 {
615 if (s == NULL) return(0);
616 return(s->timeout);
617 }
618
619long SSL_SESSION_get_time(const SSL_SESSION *s)
620 {
621 if (s == NULL) return(0);
622 return(s->time);
623 }
624
625long SSL_SESSION_set_time(SSL_SESSION *s, long t)
626 {
627 if (s == NULL) return(0);
628 s->time=t;
629 return(t);
630 }
631
632long SSL_CTX_set_timeout(SSL_CTX *s, long t)
633 {
634 long l;
635 if (s == NULL) return(0);
636 l=s->session_timeout;
637 s->session_timeout=t;
638 return(l);
639 }
640
641long SSL_CTX_get_timeout(const SSL_CTX *s)
642 {
643 if (s == NULL) return(0);
644 return(s->session_timeout);
645 }
646
647typedef struct timeout_param_st
648 {
649 SSL_CTX *ctx;
650 long time;
651 LHASH *cache;
652 } TIMEOUT_PARAM;
653
654static void timeout(SSL_SESSION *s, TIMEOUT_PARAM *p)
655 {
656 if ((p->time == 0) || (p->time > (s->time+s->timeout))) /* timeout */
657 {
658 /* The reason we don't call SSL_CTX_remove_session() is to
659 * save on locking overhead */
660 lh_delete(p->cache,s);
661 SSL_SESSION_list_remove(p->ctx,s);
662 s->not_resumable=1;
663 if (p->ctx->remove_session_cb != NULL)
664 p->ctx->remove_session_cb(p->ctx,s);
665 SSL_SESSION_free(s);
666 }
667 }
668
669static IMPLEMENT_LHASH_DOALL_ARG_FN(timeout, SSL_SESSION *, TIMEOUT_PARAM *)
670
671void SSL_CTX_flush_sessions(SSL_CTX *s, long t)
672 {
673 unsigned long i;
674 TIMEOUT_PARAM tp;
675
676 tp.ctx=s;
677 tp.cache=s->sessions;
678 if (tp.cache == NULL) return;
679 tp.time=t;
680 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
681 i=tp.cache->down_load;
682 tp.cache->down_load=0;
683 lh_doall_arg(tp.cache, LHASH_DOALL_ARG_FN(timeout), &tp);
684 tp.cache->down_load=i;
685 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
686 }
687
688int ssl_clear_bad_session(SSL *s)
689 {
690 if ( (s->session != NULL) &&
691 !(s->shutdown & SSL_SENT_SHUTDOWN) &&
692 !(SSL_in_init(s) || SSL_in_before(s)))
693 {
694 SSL_CTX_remove_session(s->ctx,s->session);
695 return(1);
696 }
697 else
698 return(0);
699 }
700
701/* locked by SSL_CTX in the calling function */
702static void SSL_SESSION_list_remove(SSL_CTX *ctx, SSL_SESSION *s)
703 {
704 if ((s->next == NULL) || (s->prev == NULL)) return;
705
706 if (s->next == (SSL_SESSION *)&(ctx->session_cache_tail))
707 { /* last element in list */
708 if (s->prev == (SSL_SESSION *)&(ctx->session_cache_head))
709 { /* only one element in list */
710 ctx->session_cache_head=NULL;
711 ctx->session_cache_tail=NULL;
712 }
713 else
714 {
715 ctx->session_cache_tail=s->prev;
716 s->prev->next=(SSL_SESSION *)&(ctx->session_cache_tail);
717 }
718 }
719 else
720 {
721 if (s->prev == (SSL_SESSION *)&(ctx->session_cache_head))
722 { /* first element in list */
723 ctx->session_cache_head=s->next;
724 s->next->prev=(SSL_SESSION *)&(ctx->session_cache_head);
725 }
726 else
727 { /* middle of list */
728 s->next->prev=s->prev;
729 s->prev->next=s->next;
730 }
731 }
732 s->prev=s->next=NULL;
733 }
734
735static void SSL_SESSION_list_add(SSL_CTX *ctx, SSL_SESSION *s)
736 {
737 if ((s->next != NULL) && (s->prev != NULL))
738 SSL_SESSION_list_remove(ctx,s);
739
740 if (ctx->session_cache_head == NULL)
741 {
742 ctx->session_cache_head=s;
743 ctx->session_cache_tail=s;
744 s->prev=(SSL_SESSION *)&(ctx->session_cache_head);
745 s->next=(SSL_SESSION *)&(ctx->session_cache_tail);
746 }
747 else
748 {
749 s->next=ctx->session_cache_head;
750 s->next->prev=s;
751 s->prev=(SSL_SESSION *)&(ctx->session_cache_head);
752 ctx->session_cache_head=s;
753 }
754 }
755
generated by cgit v1.2.3-55-g6feb (git 2.39.1) at 2025-03-20 06:13:59 +0000