1 /* ssl/ssl_sess.c */ 2 /* Copyright (C) 1995-1998 Eric Young (eay (at) cryptsoft.com) 3 * All rights reserved. 4 * 5 * This package is an SSL implementation written 6 * by Eric Young (eay (at) 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 (at) 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 (at) 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 (at) 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 #ifndef OPENSSL_NO_ENGINE 63 #include <openssl/engine.h> 64 #endif 65 #include "ssl_locl.h" 66 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); 70 71 SSL_SESSION *SSL_get_session(const SSL *ssl) 72 /* aka SSL_get0_session; gets 0 objects, just returns a copy of the pointer */ 73 { 74 return(ssl->session); 75 } 76 77 SSL_SESSION *SSL_get1_session(SSL *ssl) 78 /* variant of SSL_get_session: caller really gets something */ 79 { 80 SSL_SESSION *sess; 81 /* Need to lock this all up rather than just use CRYPTO_add so that 82 * somebody doesn't free ssl->session between when we check it's 83 * non-null and when we up the reference count. */ 84 CRYPTO_w_lock(CRYPTO_LOCK_SSL_SESSION); 85 sess = ssl->session; 86 if(sess) 87 sess->references++; 88 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_SESSION); 89 return(sess); 90 } 91 92 int SSL_SESSION_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func, 93 CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func) 94 { 95 return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL_SESSION, argl, argp, 96 new_func, dup_func, free_func); 97 } 98 99 int SSL_SESSION_set_ex_data(SSL_SESSION *s, int idx, void *arg) 100 { 101 return(CRYPTO_set_ex_data(&s->ex_data,idx,arg)); 102 } 103 104 void *SSL_SESSION_get_ex_data(const SSL_SESSION *s, int idx) 105 { 106 return(CRYPTO_get_ex_data(&s->ex_data,idx)); 107 } 108 109 SSL_SESSION *SSL_SESSION_new(void) 110 { 111 SSL_SESSION *ss; 112 113 ss=(SSL_SESSION *)OPENSSL_malloc(sizeof(SSL_SESSION)); 114 if (ss == NULL) 115 { 116 SSLerr(SSL_F_SSL_SESSION_NEW,ERR_R_MALLOC_FAILURE); 117 return(0); 118 } 119 memset(ss,0,sizeof(SSL_SESSION)); 120 121 ss->verify_result = 1; /* avoid 0 (= X509_V_OK) just in case */ 122 ss->references=1; 123 ss->timeout=60*5+4; /* 5 minute timeout by default */ 124 ss->time=(unsigned long)time(NULL); 125 ss->prev=NULL; 126 ss->next=NULL; 127 ss->compress_meth=0; 128 #ifndef OPENSSL_NO_TLSEXT 129 ss->tlsext_hostname = NULL; 130 #endif 131 CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_SESSION, ss, &ss->ex_data); 132 return(ss); 133 } 134 135 const unsigned char *SSL_SESSION_get_id(const SSL_SESSION *s, unsigned int *len) 136 { 137 if(len) 138 *len = s->session_id_length; 139 return s->session_id; 140 } 141 142 /* Even with SSLv2, we have 16 bytes (128 bits) of session ID space. SSLv3/TLSv1 143 * has 32 bytes (256 bits). As such, filling the ID with random gunk repeatedly 144 * until we have no conflict is going to complete in one iteration pretty much 145 * "most" of the time (btw: understatement). So, if it takes us 10 iterations 146 * and we still can't avoid a conflict - well that's a reasonable point to call 147 * it quits. Either the RAND code is broken or someone is trying to open roughly 148 * very close to 2^128 (or 2^256) SSL sessions to our server. How you might 149 * store that many sessions is perhaps a more interesting question ... */ 150 151 #define MAX_SESS_ID_ATTEMPTS 10 152 static int def_generate_session_id(const SSL *ssl, unsigned char *id, 153 unsigned int *id_len) 154 { 155 unsigned int retry = 0; 156 do 157 if (RAND_pseudo_bytes(id, *id_len) <= 0) 158 return 0; 159 while(SSL_has_matching_session_id(ssl, id, *id_len) && 160 (++retry < MAX_SESS_ID_ATTEMPTS)); 161 if(retry < MAX_SESS_ID_ATTEMPTS) 162 return 1; 163 /* else - woops a session_id match */ 164 /* XXX We should also check the external cache -- 165 * but the probability of a collision is negligible, and 166 * we could not prevent the concurrent creation of sessions 167 * with identical IDs since we currently don't have means 168 * to atomically check whether a session ID already exists 169 * and make a reservation for it if it does not 170 * (this problem applies to the internal cache as well). 171 */ 172 return 0; 173 } 174 175 int ssl_get_new_session(SSL *s, int session) 176 { 177 /* This gets used by clients and servers. */ 178 179 unsigned int tmp; 180 SSL_SESSION *ss=NULL; 181 GEN_SESSION_CB cb = def_generate_session_id; 182 183 if ((ss=SSL_SESSION_new()) == NULL) return(0); 184 185 /* If the context has a default timeout, use it */ 186 if (s->ctx->session_timeout == 0) 187 ss->timeout=SSL_get_default_timeout(s); 188 else 189 ss->timeout=s->ctx->session_timeout; 190 191 if (s->session != NULL) 192 { 193 SSL_SESSION_free(s->session); 194 s->session=NULL; 195 } 196 197 if (session) 198 { 199 if (s->version == SSL2_VERSION) 200 { 201 ss->ssl_version=SSL2_VERSION; 202 ss->session_id_length=SSL2_SSL_SESSION_ID_LENGTH; 203 } 204 else if (s->version == SSL3_VERSION) 205 { 206 ss->ssl_version=SSL3_VERSION; 207 ss->session_id_length=SSL3_SSL_SESSION_ID_LENGTH; 208 } 209 else if (s->version == TLS1_VERSION) 210 { 211 ss->ssl_version=TLS1_VERSION; 212 ss->session_id_length=SSL3_SSL_SESSION_ID_LENGTH; 213 } 214 else if (s->version == DTLS1_BAD_VER) 215 { 216 ss->ssl_version=DTLS1_BAD_VER; 217 ss->session_id_length=SSL3_SSL_SESSION_ID_LENGTH; 218 } 219 else if (s->version == DTLS1_VERSION) 220 { 221 ss->ssl_version=DTLS1_VERSION; 222 ss->session_id_length=SSL3_SSL_SESSION_ID_LENGTH; 223 } 224 else 225 { 226 SSLerr(SSL_F_SSL_GET_NEW_SESSION,SSL_R_UNSUPPORTED_SSL_VERSION); 227 SSL_SESSION_free(ss); 228 return(0); 229 } 230 #ifndef OPENSSL_NO_TLSEXT 231 /* If RFC4507 ticket use empty session ID */ 232 if (s->tlsext_ticket_expected) 233 { 234 ss->session_id_length = 0; 235 goto sess_id_done; 236 } 237 #endif 238 /* Choose which callback will set the session ID */ 239 CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX); 240 if(s->generate_session_id) 241 cb = s->generate_session_id; 242 else if(s->ctx->generate_session_id) 243 cb = s->ctx->generate_session_id; 244 CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX); 245 /* Choose a session ID */ 246 tmp = ss->session_id_length; 247 if(!cb(s, ss->session_id, &tmp)) 248 { 249 /* The callback failed */ 250 SSLerr(SSL_F_SSL_GET_NEW_SESSION, 251 SSL_R_SSL_SESSION_ID_CALLBACK_FAILED); 252 SSL_SESSION_free(ss); 253 return(0); 254 } 255 /* Don't allow the callback to set the session length to zero. 256 * nor set it higher than it was. */ 257 if(!tmp || (tmp > ss->session_id_length)) 258 { 259 /* The callback set an illegal length */ 260 SSLerr(SSL_F_SSL_GET_NEW_SESSION, 261 SSL_R_SSL_SESSION_ID_HAS_BAD_LENGTH); 262 SSL_SESSION_free(ss); 263 return(0); 264 } 265 /* If the session length was shrunk and we're SSLv2, pad it */ 266 if((tmp < ss->session_id_length) && (s->version == SSL2_VERSION)) 267 memset(ss->session_id + tmp, 0, ss->session_id_length - tmp); 268 else 269 ss->session_id_length = tmp; 270 /* Finally, check for a conflict */ 271 if(SSL_has_matching_session_id(s, ss->session_id, 272 ss->session_id_length)) 273 { 274 SSLerr(SSL_F_SSL_GET_NEW_SESSION, 275 SSL_R_SSL_SESSION_ID_CONFLICT); 276 SSL_SESSION_free(ss); 277 return(0); 278 } 279 #ifndef OPENSSL_NO_TLSEXT 280 sess_id_done: 281 if (s->tlsext_hostname) { 282 ss->tlsext_hostname = BUF_strdup(s->tlsext_hostname); 283 if (ss->tlsext_hostname == NULL) { 284 SSLerr(SSL_F_SSL_GET_NEW_SESSION, ERR_R_INTERNAL_ERROR); 285 SSL_SESSION_free(ss); 286 return 0; 287 } 288 } 289 #endif 290 } 291 else 292 { 293 ss->session_id_length=0; 294 } 295 296 if (s->sid_ctx_length > sizeof ss->sid_ctx) 297 { 298 SSLerr(SSL_F_SSL_GET_NEW_SESSION, ERR_R_INTERNAL_ERROR); 299 SSL_SESSION_free(ss); 300 return 0; 301 } 302 memcpy(ss->sid_ctx,s->sid_ctx,s->sid_ctx_length); 303 ss->sid_ctx_length=s->sid_ctx_length; 304 s->session=ss; 305 ss->ssl_version=s->version; 306 ss->verify_result = X509_V_OK; 307 308 return(1); 309 } 310 311 int ssl_get_prev_session(SSL *s, unsigned char *session_id, int len, 312 const unsigned char *limit) 313 { 314 /* This is used only by servers. */ 315 316 SSL_SESSION *ret=NULL; 317 int fatal = 0; 318 #ifndef OPENSSL_NO_TLSEXT 319 int r; 320 #endif 321 322 if (len > SSL_MAX_SSL_SESSION_ID_LENGTH) 323 goto err; 324 #ifndef OPENSSL_NO_TLSEXT 325 r = tls1_process_ticket(s, session_id, len, limit, &ret); 326 if (r == -1) 327 { 328 fatal = 1; 329 goto err; 330 } 331 else if (r == 0 || (!ret && !len)) 332 goto err; 333 else if (!ret && !(s->session_ctx->session_cache_mode & SSL_SESS_CACHE_NO_INTERNAL_LOOKUP)) 334 #else 335 if (len == 0) 336 goto err; 337 if (!(s->ctx->session_cache_mode & SSL_SESS_CACHE_NO_INTERNAL_LOOKUP)) 338 #endif 339 { 340 SSL_SESSION data; 341 data.ssl_version=s->version; 342 data.session_id_length=len; 343 if (len == 0) 344 return 0; 345 memcpy(data.session_id,session_id,len); 346 CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX); 347 ret=(SSL_SESSION *)lh_retrieve(s->ctx->sessions,&data); 348 if (ret != NULL) 349 /* don't allow other threads to steal it: */ 350 CRYPTO_add(&ret->references,1,CRYPTO_LOCK_SSL_SESSION); 351 CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX); 352 } 353 354 if (ret == NULL) 355 { 356 int copy=1; 357 358 s->ctx->stats.sess_miss++; 359 ret=NULL; 360 if (s->ctx->get_session_cb != NULL 361 && (ret=s->ctx->get_session_cb(s,session_id,len,©)) 362 != NULL) 363 { 364 s->ctx->stats.sess_cb_hit++; 365 366 /* Increment reference count now if the session callback 367 * asks us to do so (note that if the session structures 368 * returned by the callback are shared between threads, 369 * it must handle the reference count itself [i.e. copy == 0], 370 * or things won't be thread-safe). */ 371 if (copy) 372 CRYPTO_add(&ret->references,1,CRYPTO_LOCK_SSL_SESSION); 373 374 /* Add the externally cached session to the internal 375 * cache as well if and only if we are supposed to. */ 376 if(!(s->ctx->session_cache_mode & SSL_SESS_CACHE_NO_INTERNAL_STORE)) 377 /* The following should not return 1, otherwise, 378 * things are very strange */ 379 SSL_CTX_add_session(s->ctx,ret); 380 } 381 if (ret == NULL) 382 goto err; 383 } 384 385 /* Now ret is non-NULL, and we own one of its reference counts. */ 386 387 if (ret->sid_ctx_length != s->sid_ctx_length 388 || memcmp(ret->sid_ctx,s->sid_ctx,ret->sid_ctx_length)) 389 { 390 /* We've found the session named by the client, but we don't 391 * want to use it in this context. */ 392 393 #if 0 /* The client cannot always know when a session is not appropriate, 394 * so we shouldn't generate an error message. */ 395 396 SSLerr(SSL_F_SSL_GET_PREV_SESSION,SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT); 397 #endif 398 goto err; /* treat like cache miss */ 399 } 400 401 if((s->verify_mode & SSL_VERIFY_PEER) && s->sid_ctx_length == 0) 402 { 403 /* We can't be sure if this session is being used out of 404 * context, which is especially important for SSL_VERIFY_PEER. 405 * The application should have used SSL[_CTX]_set_session_id_context. 406 * 407 * For this error case, we generate an error instead of treating 408 * the event like a cache miss (otherwise it would be easy for 409 * applications to effectively disable the session cache by 410 * accident without anyone noticing). 411 */ 412 413 SSLerr(SSL_F_SSL_GET_PREV_SESSION,SSL_R_SESSION_ID_CONTEXT_UNINITIALIZED); 414 fatal = 1; 415 goto err; 416 } 417 418 if (ret->cipher == NULL) 419 { 420 unsigned char buf[5],*p; 421 unsigned long l; 422 423 p=buf; 424 l=ret->cipher_id; 425 l2n(l,p); 426 if ((ret->ssl_version>>8) >= SSL3_VERSION_MAJOR) 427 ret->cipher=ssl_get_cipher_by_char(s,&(buf[2])); 428 else 429 ret->cipher=ssl_get_cipher_by_char(s,&(buf[1])); 430 if (ret->cipher == NULL) 431 goto err; 432 } 433 434 435 #if 0 /* This is way too late. */ 436 437 /* If a thread got the session, then 'swaped', and another got 438 * it and then due to a time-out decided to 'OPENSSL_free' it we could 439 * be in trouble. So I'll increment it now, then double decrement 440 * later - am I speaking rubbish?. */ 441 CRYPTO_add(&ret->references,1,CRYPTO_LOCK_SSL_SESSION); 442 #endif 443 444 if (ret->timeout < (long)(time(NULL) - ret->time)) /* timeout */ 445 { 446 s->ctx->stats.sess_timeout++; 447 /* remove it from the cache */ 448 SSL_CTX_remove_session(s->ctx,ret); 449 goto err; 450 } 451 452 s->ctx->stats.sess_hit++; 453 454 /* ret->time=time(NULL); */ /* rezero timeout? */ 455 /* again, just leave the session 456 * if it is the same session, we have just incremented and 457 * then decremented the reference count :-) */ 458 if (s->session != NULL) 459 SSL_SESSION_free(s->session); 460 s->session=ret; 461 s->verify_result = s->session->verify_result; 462 return(1); 463 464 err: 465 if (ret != NULL) 466 SSL_SESSION_free(ret); 467 if (fatal) 468 return -1; 469 else 470 return 0; 471 } 472 473 int SSL_CTX_add_session(SSL_CTX *ctx, SSL_SESSION *c) 474 { 475 int ret=0; 476 SSL_SESSION *s; 477 478 /* add just 1 reference count for the SSL_CTX's session cache 479 * even though it has two ways of access: each session is in a 480 * doubly linked list and an lhash */ 481 CRYPTO_add(&c->references,1,CRYPTO_LOCK_SSL_SESSION); 482 /* if session c is in already in cache, we take back the increment later */ 483 484 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX); 485 s=(SSL_SESSION *)lh_insert(ctx->sessions,c); 486 487 /* s != NULL iff we already had a session with the given PID. 488 * In this case, s == c should hold (then we did not really modify 489 * ctx->sessions), or we're in trouble. */ 490 if (s != NULL && s != c) 491 { 492 /* We *are* in trouble ... */ 493 SSL_SESSION_list_remove(ctx,s); 494 SSL_SESSION_free(s); 495 /* ... so pretend the other session did not exist in cache 496 * (we cannot handle two SSL_SESSION structures with identical 497 * session ID in the same cache, which could happen e.g. when 498 * two threads concurrently obtain the same session from an external 499 * cache) */ 500 s = NULL; 501 } 502 503 /* Put at the head of the queue unless it is already in the cache */ 504 if (s == NULL) 505 SSL_SESSION_list_add(ctx,c); 506 507 if (s != NULL) 508 { 509 /* existing cache entry -- decrement previously incremented reference 510 * count because it already takes into account the cache */ 511 512 SSL_SESSION_free(s); /* s == c */ 513 ret=0; 514 } 515 else 516 { 517 /* new cache entry -- remove old ones if cache has become too large */ 518 519 ret=1; 520 521 if (SSL_CTX_sess_get_cache_size(ctx) > 0) 522 { 523 while (SSL_CTX_sess_number(ctx) > 524 SSL_CTX_sess_get_cache_size(ctx)) 525 { 526 if (!remove_session_lock(ctx, 527 ctx->session_cache_tail, 0)) 528 break; 529 else 530 ctx->stats.sess_cache_full++; 531 } 532 } 533 } 534 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX); 535 return(ret); 536 } 537 538 int SSL_CTX_remove_session(SSL_CTX *ctx, SSL_SESSION *c) 539 { 540 return remove_session_lock(ctx, c, 1); 541 } 542 543 static int remove_session_lock(SSL_CTX *ctx, SSL_SESSION *c, int lck) 544 { 545 SSL_SESSION *r; 546 int ret=0; 547 548 if ((c != NULL) && (c->session_id_length != 0)) 549 { 550 if(lck) CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX); 551 if ((r = (SSL_SESSION *)lh_retrieve(ctx->sessions,c)) == c) 552 { 553 ret=1; 554 r=(SSL_SESSION *)lh_delete(ctx->sessions,c); 555 SSL_SESSION_list_remove(ctx,c); 556 } 557 558 if(lck) CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX); 559 560 if (ret) 561 { 562 r->not_resumable=1; 563 if (ctx->remove_session_cb != NULL) 564 ctx->remove_session_cb(ctx,r); 565 SSL_SESSION_free(r); 566 } 567 } 568 else 569 ret=0; 570 return(ret); 571 } 572 573 void SSL_SESSION_free(SSL_SESSION *ss) 574 { 575 int i; 576 577 if(ss == NULL) 578 return; 579 580 i=CRYPTO_add(&ss->references,-1,CRYPTO_LOCK_SSL_SESSION); 581 #ifdef REF_PRINT 582 REF_PRINT("SSL_SESSION",ss); 583 #endif 584 if (i > 0) return; 585 #ifdef REF_CHECK 586 if (i < 0) 587 { 588 fprintf(stderr,"SSL_SESSION_free, bad reference count\n"); 589 abort(); /* ok */ 590 } 591 #endif 592 593 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_SESSION, ss, &ss->ex_data); 594 595 OPENSSL_cleanse(ss->key_arg,sizeof ss->key_arg); 596 OPENSSL_cleanse(ss->master_key,sizeof ss->master_key); 597 OPENSSL_cleanse(ss->session_id,sizeof ss->session_id); 598 if (ss->sess_cert != NULL) ssl_sess_cert_free(ss->sess_cert); 599 if (ss->peer != NULL) X509_free(ss->peer); 600 if (ss->ciphers != NULL) sk_SSL_CIPHER_free(ss->ciphers); 601 #ifndef OPENSSL_NO_TLSEXT 602 if (ss->tlsext_hostname != NULL) OPENSSL_free(ss->tlsext_hostname); 603 if (ss->tlsext_tick != NULL) OPENSSL_free(ss->tlsext_tick); 604 #endif 605 OPENSSL_cleanse(ss,sizeof(*ss)); 606 OPENSSL_free(ss); 607 } 608 609 int SSL_set_session(SSL *s, SSL_SESSION *session) 610 { 611 int ret=0; 612 SSL_METHOD *meth; 613 614 if (session != NULL) 615 { 616 meth=s->ctx->method->get_ssl_method(session->ssl_version); 617 if (meth == NULL) 618 meth=s->method->get_ssl_method(session->ssl_version); 619 if (meth == NULL) 620 { 621 SSLerr(SSL_F_SSL_SET_SESSION,SSL_R_UNABLE_TO_FIND_SSL_METHOD); 622 return(0); 623 } 624 625 if (meth != s->method) 626 { 627 if (!SSL_set_ssl_method(s,meth)) 628 return(0); 629 if (s->ctx->session_timeout == 0) 630 session->timeout=SSL_get_default_timeout(s); 631 else 632 session->timeout=s->ctx->session_timeout; 633 } 634 635 #ifndef OPENSSL_NO_KRB5 636 if (s->kssl_ctx && !s->kssl_ctx->client_princ && 637 session->krb5_client_princ_len > 0) 638 { 639 s->kssl_ctx->client_princ = (char *)OPENSSL_malloc(session->krb5_client_princ_len + 1); 640 memcpy(s->kssl_ctx->client_princ,session->krb5_client_princ, 641 session->krb5_client_princ_len); 642 s->kssl_ctx->client_princ[session->krb5_client_princ_len] = '\0'; 643 } 644 #endif /* OPENSSL_NO_KRB5 */ 645 646 /* CRYPTO_w_lock(CRYPTO_LOCK_SSL);*/ 647 CRYPTO_add(&session->references,1,CRYPTO_LOCK_SSL_SESSION); 648 if (s->session != NULL) 649 SSL_SESSION_free(s->session); 650 s->session=session; 651 s->verify_result = s->session->verify_result; 652 /* CRYPTO_w_unlock(CRYPTO_LOCK_SSL);*/ 653 ret=1; 654 } 655 else 656 { 657 if (s->session != NULL) 658 { 659 SSL_SESSION_free(s->session); 660 s->session=NULL; 661 } 662 663 meth=s->ctx->method; 664 if (meth != s->method) 665 { 666 if (!SSL_set_ssl_method(s,meth)) 667 return(0); 668 } 669 ret=1; 670 } 671 return(ret); 672 } 673 674 long SSL_SESSION_set_timeout(SSL_SESSION *s, long t) 675 { 676 if (s == NULL) return(0); 677 s->timeout=t; 678 return(1); 679 } 680 681 long SSL_SESSION_get_timeout(const SSL_SESSION *s) 682 { 683 if (s == NULL) return(0); 684 return(s->timeout); 685 } 686 687 long SSL_SESSION_get_time(const SSL_SESSION *s) 688 { 689 if (s == NULL) return(0); 690 return(s->time); 691 } 692 693 long SSL_SESSION_set_time(SSL_SESSION *s, long t) 694 { 695 if (s == NULL) return(0); 696 s->time=t; 697 return(t); 698 } 699 700 long SSL_CTX_set_timeout(SSL_CTX *s, long t) 701 { 702 long l; 703 if (s == NULL) return(0); 704 l=s->session_timeout; 705 s->session_timeout=t; 706 return(l); 707 } 708 709 long SSL_CTX_get_timeout(const SSL_CTX *s) 710 { 711 if (s == NULL) return(0); 712 return(s->session_timeout); 713 } 714 715 typedef struct timeout_param_st 716 { 717 SSL_CTX *ctx; 718 long time; 719 LHASH *cache; 720 } TIMEOUT_PARAM; 721 722 static void timeout(SSL_SESSION *s, TIMEOUT_PARAM *p) 723 { 724 if ((p->time == 0) || (p->time > (s->time+s->timeout))) /* timeout */ 725 { 726 /* The reason we don't call SSL_CTX_remove_session() is to 727 * save on locking overhead */ 728 lh_delete(p->cache,s); 729 SSL_SESSION_list_remove(p->ctx,s); 730 s->not_resumable=1; 731 if (p->ctx->remove_session_cb != NULL) 732 p->ctx->remove_session_cb(p->ctx,s); 733 SSL_SESSION_free(s); 734 } 735 } 736 737 static IMPLEMENT_LHASH_DOALL_ARG_FN(timeout, SSL_SESSION *, TIMEOUT_PARAM *) 738 739 void SSL_CTX_flush_sessions(SSL_CTX *s, long t) 740 { 741 unsigned long i; 742 TIMEOUT_PARAM tp; 743 744 tp.ctx=s; 745 tp.cache=s->sessions; 746 if (tp.cache == NULL) return; 747 tp.time=t; 748 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX); 749 i=tp.cache->down_load; 750 tp.cache->down_load=0; 751 lh_doall_arg(tp.cache, LHASH_DOALL_ARG_FN(timeout), &tp); 752 tp.cache->down_load=i; 753 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX); 754 } 755 756 int ssl_clear_bad_session(SSL *s) 757 { 758 if ( (s->session != NULL) && 759 !(s->shutdown & SSL_SENT_SHUTDOWN) && 760 !(SSL_in_init(s) || SSL_in_before(s))) 761 { 762 SSL_CTX_remove_session(s->ctx,s->session); 763 return(1); 764 } 765 else 766 return(0); 767 } 768 769 /* locked by SSL_CTX in the calling function */ 770 static void SSL_SESSION_list_remove(SSL_CTX *ctx, SSL_SESSION *s) 771 { 772 if ((s->next == NULL) || (s->prev == NULL)) return; 773 774 if (s->next == (SSL_SESSION *)&(ctx->session_cache_tail)) 775 { /* last element in list */ 776 if (s->prev == (SSL_SESSION *)&(ctx->session_cache_head)) 777 { /* only one element in list */ 778 ctx->session_cache_head=NULL; 779 ctx->session_cache_tail=NULL; 780 } 781 else 782 { 783 ctx->session_cache_tail=s->prev; 784 s->prev->next=(SSL_SESSION *)&(ctx->session_cache_tail); 785 } 786 } 787 else 788 { 789 if (s->prev == (SSL_SESSION *)&(ctx->session_cache_head)) 790 { /* first element in list */ 791 ctx->session_cache_head=s->next; 792 s->next->prev=(SSL_SESSION *)&(ctx->session_cache_head); 793 } 794 else 795 { /* middle of list */ 796 s->next->prev=s->prev; 797 s->prev->next=s->next; 798 } 799 } 800 s->prev=s->next=NULL; 801 } 802 803 static void SSL_SESSION_list_add(SSL_CTX *ctx, SSL_SESSION *s) 804 { 805 if ((s->next != NULL) && (s->prev != NULL)) 806 SSL_SESSION_list_remove(ctx,s); 807 808 if (ctx->session_cache_head == NULL) 809 { 810 ctx->session_cache_head=s; 811 ctx->session_cache_tail=s; 812 s->prev=(SSL_SESSION *)&(ctx->session_cache_head); 813 s->next=(SSL_SESSION *)&(ctx->session_cache_tail); 814 } 815 else 816 { 817 s->next=ctx->session_cache_head; 818 s->next->prev=s; 819 s->prev=(SSL_SESSION *)&(ctx->session_cache_head); 820 ctx->session_cache_head=s; 821 } 822 } 823 824 void SSL_CTX_sess_set_new_cb(SSL_CTX *ctx, 825 int (*cb)(struct ssl_st *ssl,SSL_SESSION *sess)) 826 { 827 ctx->new_session_cb=cb; 828 } 829 830 int (*SSL_CTX_sess_get_new_cb(SSL_CTX *ctx))(SSL *ssl, SSL_SESSION *sess) 831 { 832 return ctx->new_session_cb; 833 } 834 835 void SSL_CTX_sess_set_remove_cb(SSL_CTX *ctx, 836 void (*cb)(SSL_CTX *ctx,SSL_SESSION *sess)) 837 { 838 ctx->remove_session_cb=cb; 839 } 840 841 void (*SSL_CTX_sess_get_remove_cb(SSL_CTX *ctx))(SSL_CTX * ctx,SSL_SESSION *sess) 842 { 843 return ctx->remove_session_cb; 844 } 845 846 void SSL_CTX_sess_set_get_cb(SSL_CTX *ctx, 847 SSL_SESSION *(*cb)(struct ssl_st *ssl, 848 unsigned char *data,int len,int *copy)) 849 { 850 ctx->get_session_cb=cb; 851 } 852 853 SSL_SESSION * (*SSL_CTX_sess_get_get_cb(SSL_CTX *ctx))(SSL *ssl, 854 unsigned char *data,int len,int *copy) 855 { 856 return ctx->get_session_cb; 857 } 858 859 void SSL_CTX_set_info_callback(SSL_CTX *ctx, 860 void (*cb)(const SSL *ssl,int type,int val)) 861 { 862 ctx->info_callback=cb; 863 } 864 865 void (*SSL_CTX_get_info_callback(SSL_CTX *ctx))(const SSL *ssl,int type,int val) 866 { 867 return ctx->info_callback; 868 } 869 870 void SSL_CTX_set_client_cert_cb(SSL_CTX *ctx, 871 int (*cb)(SSL *ssl, X509 **x509, EVP_PKEY **pkey)) 872 { 873 ctx->client_cert_cb=cb; 874 } 875 876 int (*SSL_CTX_get_client_cert_cb(SSL_CTX *ctx))(SSL * ssl, X509 ** x509 , EVP_PKEY **pkey) 877 { 878 return ctx->client_cert_cb; 879 } 880 881 #ifndef OPENSSL_NO_ENGINE 882 int SSL_CTX_set_client_cert_engine(SSL_CTX *ctx, ENGINE *e) 883 { 884 if (!ENGINE_init(e)) 885 { 886 SSLerr(SSL_F_SSL_CTX_SET_CLIENT_CERT_ENGINE, ERR_R_ENGINE_LIB); 887 return 0; 888 } 889 if(!ENGINE_get_ssl_client_cert_function(e)) 890 { 891 SSLerr(SSL_F_SSL_CTX_SET_CLIENT_CERT_ENGINE, SSL_R_NO_CLIENT_CERT_METHOD); 892 ENGINE_finish(e); 893 return 0; 894 } 895 ctx->client_cert_engine = e; 896 return 1; 897 } 898 #endif 899 900 void SSL_CTX_set_cookie_generate_cb(SSL_CTX *ctx, 901 int (*cb)(SSL *ssl, unsigned char *cookie, unsigned int *cookie_len)) 902 { 903 ctx->app_gen_cookie_cb=cb; 904 } 905 906 void SSL_CTX_set_cookie_verify_cb(SSL_CTX *ctx, 907 int (*cb)(SSL *ssl, unsigned char *cookie, unsigned int cookie_len)) 908 { 909 ctx->app_verify_cookie_cb=cb; 910 } 911 912
