1 /* 2 * ! \file ssl/ssl_lib.c \brief Version independent SSL functions. 3 */ 4 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 5 * All rights reserved. 6 * 7 * This package is an SSL implementation written 8 * by Eric Young (eay@cryptsoft.com). 9 * The implementation was written so as to conform with Netscapes SSL. 10 * 11 * This library is free for commercial and non-commercial use as long as 12 * the following conditions are aheared to. The following conditions 13 * apply to all code found in this distribution, be it the RC4, RSA, 14 * lhash, DES, etc., code; not just the SSL code. The SSL documentation 15 * included with this distribution is covered by the same copyright terms 16 * except that the holder is Tim Hudson (tjh@cryptsoft.com). 17 * 18 * Copyright remains Eric Young's, and as such any Copyright notices in 19 * the code are not to be removed. 20 * If this package is used in a product, Eric Young should be given attribution 21 * as the author of the parts of the library used. 22 * This can be in the form of a textual message at program startup or 23 * in documentation (online or textual) provided with the package. 24 * 25 * Redistribution and use in source and binary forms, with or without 26 * modification, are permitted provided that the following conditions 27 * are met: 28 * 1. Redistributions of source code must retain the copyright 29 * notice, this list of conditions and the following disclaimer. 30 * 2. Redistributions in binary form must reproduce the above copyright 31 * notice, this list of conditions and the following disclaimer in the 32 * documentation and/or other materials provided with the distribution. 33 * 3. All advertising materials mentioning features or use of this software 34 * must display the following acknowledgement: 35 * "This product includes cryptographic software written by 36 * Eric Young (eay@cryptsoft.com)" 37 * The word 'cryptographic' can be left out if the rouines from the library 38 * being used are not cryptographic related :-). 39 * 4. If you include any Windows specific code (or a derivative thereof) from 40 * the apps directory (application code) you must include an acknowledgement: 41 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 42 * 43 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 44 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 45 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 46 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 47 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 48 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 49 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 50 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 51 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 52 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 53 * SUCH DAMAGE. 54 * 55 * The licence and distribution terms for any publically available version or 56 * derivative of this code cannot be changed. i.e. this code cannot simply be 57 * copied and put under another distribution licence 58 * [including the GNU Public Licence.] 59 */ 60 /* ==================================================================== 61 * Copyright (c) 1998-2007 The OpenSSL Project. All rights reserved. 62 * 63 * Redistribution and use in source and binary forms, with or without 64 * modification, are permitted provided that the following conditions 65 * are met: 66 * 67 * 1. Redistributions of source code must retain the above copyright 68 * notice, this list of conditions and the following disclaimer. 69 * 70 * 2. Redistributions in binary form must reproduce the above copyright 71 * notice, this list of conditions and the following disclaimer in 72 * the documentation and/or other materials provided with the 73 * distribution. 74 * 75 * 3. All advertising materials mentioning features or use of this 76 * software must display the following acknowledgment: 77 * "This product includes software developed by the OpenSSL Project 78 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" 79 * 80 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 81 * endorse or promote products derived from this software without 82 * prior written permission. For written permission, please contact 83 * openssl-core@openssl.org. 84 * 85 * 5. Products derived from this software may not be called "OpenSSL" 86 * nor may "OpenSSL" appear in their names without prior written 87 * permission of the OpenSSL Project. 88 * 89 * 6. Redistributions of any form whatsoever must retain the following 90 * acknowledgment: 91 * "This product includes software developed by the OpenSSL Project 92 * for use in the OpenSSL Toolkit (http://www.openssl.org/)" 93 * 94 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 95 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 96 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 97 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 98 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 99 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 100 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 101 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 102 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 103 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 104 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 105 * OF THE POSSIBILITY OF SUCH DAMAGE. 106 * ==================================================================== 107 * 108 * This product includes cryptographic software written by Eric Young 109 * (eay@cryptsoft.com). This product includes software written by Tim 110 * Hudson (tjh@cryptsoft.com). 111 * 112 */ 113 /* ==================================================================== 114 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED. 115 * ECC cipher suite support in OpenSSL originally developed by 116 * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project. 117 */ 118 /* ==================================================================== 119 * Copyright 2005 Nokia. All rights reserved. 120 * 121 * The portions of the attached software ("Contribution") is developed by 122 * Nokia Corporation and is licensed pursuant to the OpenSSL open source 123 * license. 124 * 125 * The Contribution, originally written by Mika Kousa and Pasi Eronen of 126 * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites 127 * support (see RFC 4279) to OpenSSL. 128 * 129 * No patent licenses or other rights except those expressly stated in 130 * the OpenSSL open source license shall be deemed granted or received 131 * expressly, by implication, estoppel, or otherwise. 132 * 133 * No assurances are provided by Nokia that the Contribution does not 134 * infringe the patent or other intellectual property rights of any third 135 * party or that the license provides you with all the necessary rights 136 * to make use of the Contribution. 137 * 138 * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN 139 * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA 140 * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY 141 * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR 142 * OTHERWISE. 143 */ 144 145 #ifdef REF_CHECK 146 # include <assert.h> 147 #endif 148 #include <stdio.h> 149 #include "ssl_locl.h" 150 #include "kssl_lcl.h" 151 #include <openssl/objects.h> 152 #include <openssl/lhash.h> 153 #include <openssl/x509v3.h> 154 #include <openssl/rand.h> 155 #include <openssl/ocsp.h> 156 #ifndef OPENSSL_NO_DH 157 # include <openssl/dh.h> 158 #endif 159 #ifndef OPENSSL_NO_ENGINE 160 # include <openssl/engine.h> 161 #endif 162 163 const char *SSL_version_str = OPENSSL_VERSION_TEXT; 164 165 SSL3_ENC_METHOD ssl3_undef_enc_method = { 166 /* 167 * evil casts, but these functions are only called if there's a library 168 * bug 169 */ 170 (int (*)(SSL *, int))ssl_undefined_function, 171 (int (*)(SSL *, unsigned char *, int))ssl_undefined_function, 172 ssl_undefined_function, 173 (int (*)(SSL *, unsigned char *, unsigned char *, int)) 174 ssl_undefined_function, 175 (int (*)(SSL *, int))ssl_undefined_function, 176 (int (*)(SSL *, const char *, int, unsigned char *)) 177 ssl_undefined_function, 178 0, /* finish_mac_length */ 179 (int (*)(SSL *, int, unsigned char *))ssl_undefined_function, 180 NULL, /* client_finished_label */ 181 0, /* client_finished_label_len */ 182 NULL, /* server_finished_label */ 183 0, /* server_finished_label_len */ 184 (int (*)(int))ssl_undefined_function, 185 (int (*)(SSL *, unsigned char *, size_t, const char *, 186 size_t, const unsigned char *, size_t, 187 int use_context))ssl_undefined_function, 188 }; 189 190 int SSL_clear(SSL *s) 191 { 192 193 if (s->method == NULL) { 194 SSLerr(SSL_F_SSL_CLEAR, SSL_R_NO_METHOD_SPECIFIED); 195 return (0); 196 } 197 198 if (ssl_clear_bad_session(s)) { 199 SSL_SESSION_free(s->session); 200 s->session = NULL; 201 } 202 203 s->error = 0; 204 s->hit = 0; 205 s->shutdown = 0; 206 207 #if 0 208 /* 209 * Disabled since version 1.10 of this file (early return not 210 * needed because SSL_clear is not called when doing renegotiation) 211 */ 212 /* 213 * This is set if we are doing dynamic renegotiation so keep 214 * the old cipher. It is sort of a SSL_clear_lite :-) 215 */ 216 if (s->renegotiate) 217 return (1); 218 #else 219 if (s->renegotiate) { 220 SSLerr(SSL_F_SSL_CLEAR, ERR_R_INTERNAL_ERROR); 221 return 0; 222 } 223 #endif 224 225 s->type = 0; 226 227 s->state = SSL_ST_BEFORE | ((s->server) ? SSL_ST_ACCEPT : SSL_ST_CONNECT); 228 229 s->version = s->method->version; 230 s->client_version = s->version; 231 s->rwstate = SSL_NOTHING; 232 s->rstate = SSL_ST_READ_HEADER; 233 #if 0 234 s->read_ahead = s->ctx->read_ahead; 235 #endif 236 237 if (s->init_buf != NULL) { 238 BUF_MEM_free(s->init_buf); 239 s->init_buf = NULL; 240 } 241 242 ssl_clear_cipher_ctx(s); 243 ssl_clear_hash_ctx(&s->read_hash); 244 ssl_clear_hash_ctx(&s->write_hash); 245 246 s->first_packet = 0; 247 #ifndef OPENSSL_NO_TLSEXT 248 if (s->cert != NULL) { 249 if (s->cert->alpn_proposed) { 250 OPENSSL_free(s->cert->alpn_proposed); 251 s->cert->alpn_proposed = NULL; 252 } 253 s->cert->alpn_proposed_len = 0; 254 s->cert->alpn_sent = 0; 255 } 256 #endif 257 #if 1 258 /* 259 * Check to see if we were changed into a different method, if so, revert 260 * back if we are not doing session-id reuse. 261 */ 262 if (!s->in_handshake && (s->session == NULL) 263 && (s->method != s->ctx->method)) { 264 s->method->ssl_free(s); 265 s->method = s->ctx->method; 266 if (!s->method->ssl_new(s)) 267 return (0); 268 } else 269 #endif 270 s->method->ssl_clear(s); 271 return (1); 272 } 273 274 /** Used to change an SSL_CTXs default SSL method type */ 275 int SSL_CTX_set_ssl_version(SSL_CTX *ctx, const SSL_METHOD *meth) 276 { 277 STACK_OF(SSL_CIPHER) *sk; 278 279 ctx->method = meth; 280 281 sk = ssl_create_cipher_list(ctx->method, &(ctx->cipher_list), 282 &(ctx->cipher_list_by_id), 283 meth->version == 284 SSL2_VERSION ? "SSLv2" : 285 SSL_DEFAULT_CIPHER_LIST, ctx->cert); 286 if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= 0)) { 287 SSLerr(SSL_F_SSL_CTX_SET_SSL_VERSION, 288 SSL_R_SSL_LIBRARY_HAS_NO_CIPHERS); 289 return (0); 290 } 291 return (1); 292 } 293 294 SSL *SSL_new(SSL_CTX *ctx) 295 { 296 SSL *s; 297 298 if (ctx == NULL) { 299 SSLerr(SSL_F_SSL_NEW, SSL_R_NULL_SSL_CTX); 300 return (NULL); 301 } 302 if (ctx->method == NULL) { 303 SSLerr(SSL_F_SSL_NEW, SSL_R_SSL_CTX_HAS_NO_DEFAULT_SSL_VERSION); 304 return (NULL); 305 } 306 307 s = (SSL *)OPENSSL_malloc(sizeof(SSL)); 308 if (s == NULL) 309 goto err; 310 memset(s, 0, sizeof(SSL)); 311 312 #ifndef OPENSSL_NO_KRB5 313 s->kssl_ctx = kssl_ctx_new(); 314 #endif /* OPENSSL_NO_KRB5 */ 315 316 s->options = ctx->options; 317 s->mode = ctx->mode; 318 s->max_cert_list = ctx->max_cert_list; 319 s->references = 1; 320 321 if (ctx->cert != NULL) { 322 /* 323 * Earlier library versions used to copy the pointer to the CERT, not 324 * its contents; only when setting new parameters for the per-SSL 325 * copy, ssl_cert_new would be called (and the direct reference to 326 * the per-SSL_CTX settings would be lost, but those still were 327 * indirectly accessed for various purposes, and for that reason they 328 * used to be known as s->ctx->default_cert). Now we don't look at the 329 * SSL_CTX's CERT after having duplicated it once. 330 */ 331 332 s->cert = ssl_cert_dup(ctx->cert); 333 if (s->cert == NULL) 334 goto err; 335 } else 336 s->cert = NULL; /* Cannot really happen (see SSL_CTX_new) */ 337 338 s->read_ahead = ctx->read_ahead; 339 s->msg_callback = ctx->msg_callback; 340 s->msg_callback_arg = ctx->msg_callback_arg; 341 s->verify_mode = ctx->verify_mode; 342 #if 0 343 s->verify_depth = ctx->verify_depth; 344 #endif 345 s->sid_ctx_length = ctx->sid_ctx_length; 346 OPENSSL_assert(s->sid_ctx_length <= sizeof s->sid_ctx); 347 memcpy(&s->sid_ctx, &ctx->sid_ctx, sizeof(s->sid_ctx)); 348 s->verify_callback = ctx->default_verify_callback; 349 s->generate_session_id = ctx->generate_session_id; 350 351 s->param = X509_VERIFY_PARAM_new(); 352 if (!s->param) 353 goto err; 354 X509_VERIFY_PARAM_inherit(s->param, ctx->param); 355 #if 0 356 s->purpose = ctx->purpose; 357 s->trust = ctx->trust; 358 #endif 359 s->quiet_shutdown = ctx->quiet_shutdown; 360 s->max_send_fragment = ctx->max_send_fragment; 361 362 CRYPTO_add(&ctx->references, 1, CRYPTO_LOCK_SSL_CTX); 363 s->ctx = ctx; 364 #ifndef OPENSSL_NO_TLSEXT 365 s->tlsext_debug_cb = 0; 366 s->tlsext_debug_arg = NULL; 367 s->tlsext_ticket_expected = 0; 368 s->tlsext_status_type = -1; 369 s->tlsext_status_expected = 0; 370 s->tlsext_ocsp_ids = NULL; 371 s->tlsext_ocsp_exts = NULL; 372 s->tlsext_ocsp_resp = NULL; 373 s->tlsext_ocsp_resplen = -1; 374 CRYPTO_add(&ctx->references, 1, CRYPTO_LOCK_SSL_CTX); 375 s->initial_ctx = ctx; 376 # ifndef OPENSSL_NO_EC 377 if (ctx->tlsext_ecpointformatlist) { 378 s->tlsext_ecpointformatlist = 379 BUF_memdup(ctx->tlsext_ecpointformatlist, 380 ctx->tlsext_ecpointformatlist_length); 381 if (!s->tlsext_ecpointformatlist) 382 goto err; 383 s->tlsext_ecpointformatlist_length = 384 ctx->tlsext_ecpointformatlist_length; 385 } 386 if (ctx->tlsext_ellipticcurvelist) { 387 s->tlsext_ellipticcurvelist = 388 BUF_memdup(ctx->tlsext_ellipticcurvelist, 389 ctx->tlsext_ellipticcurvelist_length); 390 if (!s->tlsext_ellipticcurvelist) 391 goto err; 392 s->tlsext_ellipticcurvelist_length = 393 ctx->tlsext_ellipticcurvelist_length; 394 } 395 # endif 396 # ifndef OPENSSL_NO_NEXTPROTONEG 397 s->next_proto_negotiated = NULL; 398 # endif 399 400 if (s->ctx->alpn_client_proto_list) { 401 s->alpn_client_proto_list = 402 OPENSSL_malloc(s->ctx->alpn_client_proto_list_len); 403 if (s->alpn_client_proto_list == NULL) 404 goto err; 405 memcpy(s->alpn_client_proto_list, s->ctx->alpn_client_proto_list, 406 s->ctx->alpn_client_proto_list_len); 407 s->alpn_client_proto_list_len = s->ctx->alpn_client_proto_list_len; 408 } 409 #endif 410 411 s->verify_result = X509_V_OK; 412 413 s->method = ctx->method; 414 415 if (!s->method->ssl_new(s)) 416 goto err; 417 418 s->server = (ctx->method->ssl_accept == ssl_undefined_function) ? 0 : 1; 419 420 SSL_clear(s); 421 422 CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data); 423 424 #ifndef OPENSSL_NO_PSK 425 s->psk_client_callback = ctx->psk_client_callback; 426 s->psk_server_callback = ctx->psk_server_callback; 427 #endif 428 429 return (s); 430 err: 431 if (s != NULL) 432 SSL_free(s); 433 SSLerr(SSL_F_SSL_NEW, ERR_R_MALLOC_FAILURE); 434 return (NULL); 435 } 436 437 int SSL_CTX_set_session_id_context(SSL_CTX *ctx, const unsigned char *sid_ctx, 438 unsigned int sid_ctx_len) 439 { 440 if (sid_ctx_len > sizeof ctx->sid_ctx) { 441 SSLerr(SSL_F_SSL_CTX_SET_SESSION_ID_CONTEXT, 442 SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG); 443 return 0; 444 } 445 ctx->sid_ctx_length = sid_ctx_len; 446 memcpy(ctx->sid_ctx, sid_ctx, sid_ctx_len); 447 448 return 1; 449 } 450 451 int SSL_set_session_id_context(SSL *ssl, const unsigned char *sid_ctx, 452 unsigned int sid_ctx_len) 453 { 454 if (sid_ctx_len > SSL_MAX_SID_CTX_LENGTH) { 455 SSLerr(SSL_F_SSL_SET_SESSION_ID_CONTEXT, 456 SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG); 457 return 0; 458 } 459 ssl->sid_ctx_length = sid_ctx_len; 460 memcpy(ssl->sid_ctx, sid_ctx, sid_ctx_len); 461 462 return 1; 463 } 464 465 int SSL_CTX_set_generate_session_id(SSL_CTX *ctx, GEN_SESSION_CB cb) 466 { 467 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX); 468 ctx->generate_session_id = cb; 469 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX); 470 return 1; 471 } 472 473 int SSL_set_generate_session_id(SSL *ssl, GEN_SESSION_CB cb) 474 { 475 CRYPTO_w_lock(CRYPTO_LOCK_SSL); 476 ssl->generate_session_id = cb; 477 CRYPTO_w_unlock(CRYPTO_LOCK_SSL); 478 return 1; 479 } 480 481 int SSL_has_matching_session_id(const SSL *ssl, const unsigned char *id, 482 unsigned int id_len) 483 { 484 /* 485 * A quick examination of SSL_SESSION_hash and SSL_SESSION_cmp shows how 486 * we can "construct" a session to give us the desired check - ie. to 487 * find if there's a session in the hash table that would conflict with 488 * any new session built out of this id/id_len and the ssl_version in use 489 * by this SSL. 490 */ 491 SSL_SESSION r, *p; 492 493 if (id_len > sizeof r.session_id) 494 return 0; 495 496 r.ssl_version = ssl->version; 497 r.session_id_length = id_len; 498 memcpy(r.session_id, id, id_len); 499 /* 500 * NB: SSLv2 always uses a fixed 16-byte session ID, so even if a 501 * callback is calling us to check the uniqueness of a shorter ID, it 502 * must be compared as a padded-out ID because that is what it will be 503 * converted to when the callback has finished choosing it. 504 */ 505 if ((r.ssl_version == SSL2_VERSION) && 506 (id_len < SSL2_SSL_SESSION_ID_LENGTH)) { 507 memset(r.session_id + id_len, 0, SSL2_SSL_SESSION_ID_LENGTH - id_len); 508 r.session_id_length = SSL2_SSL_SESSION_ID_LENGTH; 509 } 510 511 CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX); 512 p = lh_SSL_SESSION_retrieve(ssl->ctx->sessions, &r); 513 CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX); 514 return (p != NULL); 515 } 516 517 int SSL_CTX_set_purpose(SSL_CTX *s, int purpose) 518 { 519 return X509_VERIFY_PARAM_set_purpose(s->param, purpose); 520 } 521 522 int SSL_set_purpose(SSL *s, int purpose) 523 { 524 return X509_VERIFY_PARAM_set_purpose(s->param, purpose); 525 } 526 527 int SSL_CTX_set_trust(SSL_CTX *s, int trust) 528 { 529 return X509_VERIFY_PARAM_set_trust(s->param, trust); 530 } 531 532 int SSL_set_trust(SSL *s, int trust) 533 { 534 return X509_VERIFY_PARAM_set_trust(s->param, trust); 535 } 536 537 int SSL_CTX_set1_param(SSL_CTX *ctx, X509_VERIFY_PARAM *vpm) 538 { 539 return X509_VERIFY_PARAM_set1(ctx->param, vpm); 540 } 541 542 int SSL_set1_param(SSL *ssl, X509_VERIFY_PARAM *vpm) 543 { 544 return X509_VERIFY_PARAM_set1(ssl->param, vpm); 545 } 546 547 X509_VERIFY_PARAM *SSL_CTX_get0_param(SSL_CTX *ctx) 548 { 549 return ctx->param; 550 } 551 552 X509_VERIFY_PARAM *SSL_get0_param(SSL *ssl) 553 { 554 return ssl->param; 555 } 556 557 void SSL_certs_clear(SSL *s) 558 { 559 ssl_cert_clear_certs(s->cert); 560 } 561 562 void SSL_free(SSL *s) 563 { 564 int i; 565 566 if (s == NULL) 567 return; 568 569 i = CRYPTO_add(&s->references, -1, CRYPTO_LOCK_SSL); 570 #ifdef REF_PRINT 571 REF_PRINT("SSL", s); 572 #endif 573 if (i > 0) 574 return; 575 #ifdef REF_CHECK 576 if (i < 0) { 577 fprintf(stderr, "SSL_free, bad reference count\n"); 578 abort(); /* ok */ 579 } 580 #endif 581 582 if (s->param) 583 X509_VERIFY_PARAM_free(s->param); 584 585 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data); 586 587 if (s->bbio != NULL) { 588 /* If the buffering BIO is in place, pop it off */ 589 if (s->bbio == s->wbio) { 590 s->wbio = BIO_pop(s->wbio); 591 } 592 BIO_free(s->bbio); 593 s->bbio = NULL; 594 } 595 if (s->rbio != NULL) 596 BIO_free_all(s->rbio); 597 if ((s->wbio != NULL) && (s->wbio != s->rbio)) 598 BIO_free_all(s->wbio); 599 600 if (s->init_buf != NULL) 601 BUF_MEM_free(s->init_buf); 602 603 /* add extra stuff */ 604 if (s->cipher_list != NULL) 605 sk_SSL_CIPHER_free(s->cipher_list); 606 if (s->cipher_list_by_id != NULL) 607 sk_SSL_CIPHER_free(s->cipher_list_by_id); 608 609 /* Make the next call work :-) */ 610 if (s->session != NULL) { 611 ssl_clear_bad_session(s); 612 SSL_SESSION_free(s->session); 613 } 614 615 ssl_clear_cipher_ctx(s); 616 ssl_clear_hash_ctx(&s->read_hash); 617 ssl_clear_hash_ctx(&s->write_hash); 618 619 if (s->cert != NULL) 620 ssl_cert_free(s->cert); 621 /* Free up if allocated */ 622 623 #ifndef OPENSSL_NO_TLSEXT 624 if (s->tlsext_hostname) 625 OPENSSL_free(s->tlsext_hostname); 626 if (s->initial_ctx) 627 SSL_CTX_free(s->initial_ctx); 628 # ifndef OPENSSL_NO_EC 629 if (s->tlsext_ecpointformatlist) 630 OPENSSL_free(s->tlsext_ecpointformatlist); 631 if (s->tlsext_ellipticcurvelist) 632 OPENSSL_free(s->tlsext_ellipticcurvelist); 633 # endif /* OPENSSL_NO_EC */ 634 if (s->tlsext_opaque_prf_input) 635 OPENSSL_free(s->tlsext_opaque_prf_input); 636 if (s->tlsext_ocsp_exts) 637 sk_X509_EXTENSION_pop_free(s->tlsext_ocsp_exts, X509_EXTENSION_free); 638 if (s->tlsext_ocsp_ids) 639 sk_OCSP_RESPID_pop_free(s->tlsext_ocsp_ids, OCSP_RESPID_free); 640 if (s->tlsext_ocsp_resp) 641 OPENSSL_free(s->tlsext_ocsp_resp); 642 if (s->alpn_client_proto_list) 643 OPENSSL_free(s->alpn_client_proto_list); 644 #endif 645 646 if (s->client_CA != NULL) 647 sk_X509_NAME_pop_free(s->client_CA, X509_NAME_free); 648 649 if (s->method != NULL) 650 s->method->ssl_free(s); 651 652 if (s->ctx) 653 SSL_CTX_free(s->ctx); 654 655 #ifndef OPENSSL_NO_KRB5 656 if (s->kssl_ctx != NULL) 657 kssl_ctx_free(s->kssl_ctx); 658 #endif /* OPENSSL_NO_KRB5 */ 659 660 #if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG) 661 if (s->next_proto_negotiated) 662 OPENSSL_free(s->next_proto_negotiated); 663 #endif 664 665 #ifndef OPENSSL_NO_SRTP 666 if (s->srtp_profiles) 667 sk_SRTP_PROTECTION_PROFILE_free(s->srtp_profiles); 668 #endif 669 670 OPENSSL_free(s); 671 } 672 673 void SSL_set_bio(SSL *s, BIO *rbio, BIO *wbio) 674 { 675 /* 676 * If the output buffering BIO is still in place, remove it 677 */ 678 if (s->bbio != NULL) { 679 if (s->wbio == s->bbio) { 680 s->wbio = s->wbio->next_bio; 681 s->bbio->next_bio = NULL; 682 } 683 } 684 if ((s->rbio != NULL) && (s->rbio != rbio)) 685 BIO_free_all(s->rbio); 686 if ((s->wbio != NULL) && (s->wbio != wbio) && (s->rbio != s->wbio)) 687 BIO_free_all(s->wbio); 688 s->rbio = rbio; 689 s->wbio = wbio; 690 } 691 692 BIO *SSL_get_rbio(const SSL *s) 693 { 694 return (s->rbio); 695 } 696 697 BIO *SSL_get_wbio(const SSL *s) 698 { 699 return (s->wbio); 700 } 701 702 int SSL_get_fd(const SSL *s) 703 { 704 return (SSL_get_rfd(s)); 705 } 706 707 int SSL_get_rfd(const SSL *s) 708 { 709 int ret = -1; 710 BIO *b, *r; 711 712 b = SSL_get_rbio(s); 713 r = BIO_find_type(b, BIO_TYPE_DESCRIPTOR); 714 if (r != NULL) 715 BIO_get_fd(r, &ret); 716 return (ret); 717 } 718 719 int SSL_get_wfd(const SSL *s) 720 { 721 int ret = -1; 722 BIO *b, *r; 723 724 b = SSL_get_wbio(s); 725 r = BIO_find_type(b, BIO_TYPE_DESCRIPTOR); 726 if (r != NULL) 727 BIO_get_fd(r, &ret); 728 return (ret); 729 } 730 731 #ifndef OPENSSL_NO_SOCK 732 int SSL_set_fd(SSL *s, int fd) 733 { 734 int ret = 0; 735 BIO *bio = NULL; 736 737 bio = BIO_new(BIO_s_socket()); 738 739 if (bio == NULL) { 740 SSLerr(SSL_F_SSL_SET_FD, ERR_R_BUF_LIB); 741 goto err; 742 } 743 BIO_set_fd(bio, fd, BIO_NOCLOSE); 744 SSL_set_bio(s, bio, bio); 745 ret = 1; 746 err: 747 return (ret); 748 } 749 750 int SSL_set_wfd(SSL *s, int fd) 751 { 752 int ret = 0; 753 BIO *bio = NULL; 754 755 if ((s->rbio == NULL) || (BIO_method_type(s->rbio) != BIO_TYPE_SOCKET) 756 || ((int)BIO_get_fd(s->rbio, NULL) != fd)) { 757 bio = BIO_new(BIO_s_socket()); 758 759 if (bio == NULL) { 760 SSLerr(SSL_F_SSL_SET_WFD, ERR_R_BUF_LIB); 761 goto err; 762 } 763 BIO_set_fd(bio, fd, BIO_NOCLOSE); 764 SSL_set_bio(s, SSL_get_rbio(s), bio); 765 } else 766 SSL_set_bio(s, SSL_get_rbio(s), SSL_get_rbio(s)); 767 ret = 1; 768 err: 769 return (ret); 770 } 771 772 int SSL_set_rfd(SSL *s, int fd) 773 { 774 int ret = 0; 775 BIO *bio = NULL; 776 777 if ((s->wbio == NULL) || (BIO_method_type(s->wbio) != BIO_TYPE_SOCKET) 778 || ((int)BIO_get_fd(s->wbio, NULL) != fd)) { 779 bio = BIO_new(BIO_s_socket()); 780 781 if (bio == NULL) { 782 SSLerr(SSL_F_SSL_SET_RFD, ERR_R_BUF_LIB); 783 goto err; 784 } 785 BIO_set_fd(bio, fd, BIO_NOCLOSE); 786 SSL_set_bio(s, bio, SSL_get_wbio(s)); 787 } else 788 SSL_set_bio(s, SSL_get_wbio(s), SSL_get_wbio(s)); 789 ret = 1; 790 err: 791 return (ret); 792 } 793 #endif 794 795 /* return length of latest Finished message we sent, copy to 'buf' */ 796 size_t SSL_get_finished(const SSL *s, void *buf, size_t count) 797 { 798 size_t ret = 0; 799 800 if (s->s3 != NULL) { 801 ret = s->s3->tmp.finish_md_len; 802 if (count > ret) 803 count = ret; 804 memcpy(buf, s->s3->tmp.finish_md, count); 805 } 806 return ret; 807 } 808 809 /* return length of latest Finished message we expected, copy to 'buf' */ 810 size_t SSL_get_peer_finished(const SSL *s, void *buf, size_t count) 811 { 812 size_t ret = 0; 813 814 if (s->s3 != NULL) { 815 ret = s->s3->tmp.peer_finish_md_len; 816 if (count > ret) 817 count = ret; 818 memcpy(buf, s->s3->tmp.peer_finish_md, count); 819 } 820 return ret; 821 } 822 823 int SSL_get_verify_mode(const SSL *s) 824 { 825 return (s->verify_mode); 826 } 827 828 int SSL_get_verify_depth(const SSL *s) 829 { 830 return X509_VERIFY_PARAM_get_depth(s->param); 831 } 832 833 int (*SSL_get_verify_callback(const SSL *s)) (int, X509_STORE_CTX *) { 834 return (s->verify_callback); 835 } 836 837 int SSL_CTX_get_verify_mode(const SSL_CTX *ctx) 838 { 839 return (ctx->verify_mode); 840 } 841 842 int SSL_CTX_get_verify_depth(const SSL_CTX *ctx) 843 { 844 return X509_VERIFY_PARAM_get_depth(ctx->param); 845 } 846 847 int (*SSL_CTX_get_verify_callback(const SSL_CTX *ctx)) (int, X509_STORE_CTX *) { 848 return (ctx->default_verify_callback); 849 } 850 851 void SSL_set_verify(SSL *s, int mode, 852 int (*callback) (int ok, X509_STORE_CTX *ctx)) 853 { 854 s->verify_mode = mode; 855 if (callback != NULL) 856 s->verify_callback = callback; 857 } 858 859 void SSL_set_verify_depth(SSL *s, int depth) 860 { 861 X509_VERIFY_PARAM_set_depth(s->param, depth); 862 } 863 864 void SSL_set_read_ahead(SSL *s, int yes) 865 { 866 s->read_ahead = yes; 867 } 868 869 int SSL_get_read_ahead(const SSL *s) 870 { 871 return (s->read_ahead); 872 } 873 874 int SSL_pending(const SSL *s) 875 { 876 /* 877 * SSL_pending cannot work properly if read-ahead is enabled 878 * (SSL_[CTX_]ctrl(..., SSL_CTRL_SET_READ_AHEAD, 1, NULL)), and it is 879 * impossible to fix since SSL_pending cannot report errors that may be 880 * observed while scanning the new data. (Note that SSL_pending() is 881 * often used as a boolean value, so we'd better not return -1.) 882 */ 883 return (s->method->ssl_pending(s)); 884 } 885 886 X509 *SSL_get_peer_certificate(const SSL *s) 887 { 888 X509 *r; 889 890 if ((s == NULL) || (s->session == NULL)) 891 r = NULL; 892 else 893 r = s->session->peer; 894 895 if (r == NULL) 896 return (r); 897 898 CRYPTO_add(&r->references, 1, CRYPTO_LOCK_X509); 899 900 return (r); 901 } 902 903 STACK_OF(X509) *SSL_get_peer_cert_chain(const SSL *s) 904 { 905 STACK_OF(X509) *r; 906 907 if ((s == NULL) || (s->session == NULL) 908 || (s->session->sess_cert == NULL)) 909 r = NULL; 910 else 911 r = s->session->sess_cert->cert_chain; 912 913 /* 914 * If we are a client, cert_chain includes the peer's own certificate; if 915 * we are a server, it does not. 916 */ 917 918 return (r); 919 } 920 921 /* 922 * Now in theory, since the calling process own 't' it should be safe to 923 * modify. We need to be able to read f without being hassled 924 */ 925 void SSL_copy_session_id(SSL *t, const SSL *f) 926 { 927 CERT *tmp; 928 929 /* Do we need to to SSL locking? */ 930 SSL_set_session(t, SSL_get_session(f)); 931 932 /* 933 * what if we are setup as SSLv2 but want to talk SSLv3 or vice-versa 934 */ 935 if (t->method != f->method) { 936 t->method->ssl_free(t); /* cleanup current */ 937 t->method = f->method; /* change method */ 938 t->method->ssl_new(t); /* setup new */ 939 } 940 941 tmp = t->cert; 942 if (f->cert != NULL) { 943 CRYPTO_add(&f->cert->references, 1, CRYPTO_LOCK_SSL_CERT); 944 t->cert = f->cert; 945 } else 946 t->cert = NULL; 947 if (tmp != NULL) 948 ssl_cert_free(tmp); 949 SSL_set_session_id_context(t, f->sid_ctx, f->sid_ctx_length); 950 } 951 952 /* Fix this so it checks all the valid key/cert options */ 953 int SSL_CTX_check_private_key(const SSL_CTX *ctx) 954 { 955 if ((ctx == NULL) || 956 (ctx->cert == NULL) || (ctx->cert->key->x509 == NULL)) { 957 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY, 958 SSL_R_NO_CERTIFICATE_ASSIGNED); 959 return (0); 960 } 961 if (ctx->cert->key->privatekey == NULL) { 962 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY, 963 SSL_R_NO_PRIVATE_KEY_ASSIGNED); 964 return (0); 965 } 966 return (X509_check_private_key 967 (ctx->cert->key->x509, ctx->cert->key->privatekey)); 968 } 969 970 /* Fix this function so that it takes an optional type parameter */ 971 int SSL_check_private_key(const SSL *ssl) 972 { 973 if (ssl == NULL) { 974 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY, ERR_R_PASSED_NULL_PARAMETER); 975 return (0); 976 } 977 if (ssl->cert == NULL) { 978 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY, SSL_R_NO_CERTIFICATE_ASSIGNED); 979 return 0; 980 } 981 if (ssl->cert->key->x509 == NULL) { 982 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY, SSL_R_NO_CERTIFICATE_ASSIGNED); 983 return (0); 984 } 985 if (ssl->cert->key->privatekey == NULL) { 986 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY, SSL_R_NO_PRIVATE_KEY_ASSIGNED); 987 return (0); 988 } 989 return (X509_check_private_key(ssl->cert->key->x509, 990 ssl->cert->key->privatekey)); 991 } 992 993 int SSL_accept(SSL *s) 994 { 995 if (s->handshake_func == 0) 996 /* Not properly initialized yet */ 997 SSL_set_accept_state(s); 998 999 return (s->method->ssl_accept(s)); 1000 } 1001 1002 int SSL_connect(SSL *s) 1003 { 1004 if (s->handshake_func == 0) 1005 /* Not properly initialized yet */ 1006 SSL_set_connect_state(s); 1007 1008 return (s->method->ssl_connect(s)); 1009 } 1010 1011 long SSL_get_default_timeout(const SSL *s) 1012 { 1013 return (s->method->get_timeout()); 1014 } 1015 1016 int SSL_read(SSL *s, void *buf, int num) 1017 { 1018 if (s->handshake_func == 0) { 1019 SSLerr(SSL_F_SSL_READ, SSL_R_UNINITIALIZED); 1020 return -1; 1021 } 1022 1023 if (s->shutdown & SSL_RECEIVED_SHUTDOWN) { 1024 s->rwstate = SSL_NOTHING; 1025 return (0); 1026 } 1027 return (s->method->ssl_read(s, buf, num)); 1028 } 1029 1030 int SSL_peek(SSL *s, void *buf, int num) 1031 { 1032 if (s->handshake_func == 0) { 1033 SSLerr(SSL_F_SSL_PEEK, SSL_R_UNINITIALIZED); 1034 return -1; 1035 } 1036 1037 if (s->shutdown & SSL_RECEIVED_SHUTDOWN) { 1038 return (0); 1039 } 1040 return (s->method->ssl_peek(s, buf, num)); 1041 } 1042 1043 int SSL_write(SSL *s, const void *buf, int num) 1044 { 1045 if (s->handshake_func == 0) { 1046 SSLerr(SSL_F_SSL_WRITE, SSL_R_UNINITIALIZED); 1047 return -1; 1048 } 1049 1050 if (s->shutdown & SSL_SENT_SHUTDOWN) { 1051 s->rwstate = SSL_NOTHING; 1052 SSLerr(SSL_F_SSL_WRITE, SSL_R_PROTOCOL_IS_SHUTDOWN); 1053 return (-1); 1054 } 1055 return (s->method->ssl_write(s, buf, num)); 1056 } 1057 1058 int SSL_shutdown(SSL *s) 1059 { 1060 /* 1061 * Note that this function behaves differently from what one might 1062 * expect. Return values are 0 for no success (yet), 1 for success; but 1063 * calling it once is usually not enough, even if blocking I/O is used 1064 * (see ssl3_shutdown). 1065 */ 1066 1067 if (s->handshake_func == 0) { 1068 SSLerr(SSL_F_SSL_SHUTDOWN, SSL_R_UNINITIALIZED); 1069 return -1; 1070 } 1071 1072 if (!SSL_in_init(s)) { 1073 return s->method->ssl_shutdown(s); 1074 } else { 1075 SSLerr(SSL_F_SSL_SHUTDOWN, SSL_R_SHUTDOWN_WHILE_IN_INIT); 1076 return -1; 1077 } 1078 } 1079 1080 int SSL_renegotiate(SSL *s) 1081 { 1082 if (s->renegotiate == 0) 1083 s->renegotiate = 1; 1084 1085 s->new_session = 1; 1086 1087 return (s->method->ssl_renegotiate(s)); 1088 } 1089 1090 int SSL_renegotiate_abbreviated(SSL *s) 1091 { 1092 if (s->renegotiate == 0) 1093 s->renegotiate = 1; 1094 1095 s->new_session = 0; 1096 1097 return (s->method->ssl_renegotiate(s)); 1098 } 1099 1100 int SSL_renegotiate_pending(SSL *s) 1101 { 1102 /* 1103 * becomes true when negotiation is requested; false again once a 1104 * handshake has finished 1105 */ 1106 return (s->renegotiate != 0); 1107 } 1108 1109 long SSL_ctrl(SSL *s, int cmd, long larg, void *parg) 1110 { 1111 long l; 1112 1113 switch (cmd) { 1114 case SSL_CTRL_GET_READ_AHEAD: 1115 return (s->read_ahead); 1116 case SSL_CTRL_SET_READ_AHEAD: 1117 l = s->read_ahead; 1118 s->read_ahead = larg; 1119 return (l); 1120 1121 case SSL_CTRL_SET_MSG_CALLBACK_ARG: 1122 s->msg_callback_arg = parg; 1123 return 1; 1124 1125 case SSL_CTRL_OPTIONS: 1126 return (s->options |= larg); 1127 case SSL_CTRL_CLEAR_OPTIONS: 1128 return (s->options &= ~larg); 1129 case SSL_CTRL_MODE: 1130 return (s->mode |= larg); 1131 case SSL_CTRL_CLEAR_MODE: 1132 return (s->mode &= ~larg); 1133 case SSL_CTRL_GET_MAX_CERT_LIST: 1134 return (s->max_cert_list); 1135 case SSL_CTRL_SET_MAX_CERT_LIST: 1136 l = s->max_cert_list; 1137 s->max_cert_list = larg; 1138 return (l); 1139 case SSL_CTRL_SET_MAX_SEND_FRAGMENT: 1140 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH) 1141 return 0; 1142 s->max_send_fragment = larg; 1143 return 1; 1144 case SSL_CTRL_GET_RI_SUPPORT: 1145 if (s->s3) 1146 return s->s3->send_connection_binding; 1147 else 1148 return 0; 1149 case SSL_CTRL_CERT_FLAGS: 1150 return (s->cert->cert_flags |= larg); 1151 case SSL_CTRL_CLEAR_CERT_FLAGS: 1152 return (s->cert->cert_flags &= ~larg); 1153 1154 case SSL_CTRL_GET_RAW_CIPHERLIST: 1155 if (parg) { 1156 if (s->cert->ciphers_raw == NULL) 1157 return 0; 1158 *(unsigned char **)parg = s->cert->ciphers_raw; 1159 return (int)s->cert->ciphers_rawlen; 1160 } else 1161 return ssl_put_cipher_by_char(s, NULL, NULL); 1162 default: 1163 return (s->method->ssl_ctrl(s, cmd, larg, parg)); 1164 } 1165 } 1166 1167 long SSL_callback_ctrl(SSL *s, int cmd, void (*fp) (void)) 1168 { 1169 switch (cmd) { 1170 case SSL_CTRL_SET_MSG_CALLBACK: 1171 s->msg_callback = (void (*) 1172 (int write_p, int version, int content_type, 1173 const void *buf, size_t len, SSL *ssl, 1174 void *arg))(fp); 1175 return 1; 1176 1177 default: 1178 return (s->method->ssl_callback_ctrl(s, cmd, fp)); 1179 } 1180 } 1181 1182 LHASH_OF(SSL_SESSION) *SSL_CTX_sessions(SSL_CTX *ctx) 1183 { 1184 return ctx->sessions; 1185 } 1186 1187 long SSL_CTX_ctrl(SSL_CTX *ctx, int cmd, long larg, void *parg) 1188 { 1189 long l; 1190 /* For some cases with ctx == NULL perform syntax checks */ 1191 if (ctx == NULL) { 1192 switch (cmd) { 1193 #ifndef OPENSSL_NO_EC 1194 case SSL_CTRL_SET_CURVES_LIST: 1195 return tls1_set_curves_list(NULL, NULL, parg); 1196 #endif 1197 case SSL_CTRL_SET_SIGALGS_LIST: 1198 case SSL_CTRL_SET_CLIENT_SIGALGS_LIST: 1199 return tls1_set_sigalgs_list(NULL, parg, 0); 1200 default: 1201 return 0; 1202 } 1203 } 1204 1205 switch (cmd) { 1206 case SSL_CTRL_GET_READ_AHEAD: 1207 return (ctx->read_ahead); 1208 case SSL_CTRL_SET_READ_AHEAD: 1209 l = ctx->read_ahead; 1210 ctx->read_ahead = larg; 1211 return (l); 1212 1213 case SSL_CTRL_SET_MSG_CALLBACK_ARG: 1214 ctx->msg_callback_arg = parg; 1215 return 1; 1216 1217 case SSL_CTRL_GET_MAX_CERT_LIST: 1218 return (ctx->max_cert_list); 1219 case SSL_CTRL_SET_MAX_CERT_LIST: 1220 l = ctx->max_cert_list; 1221 ctx->max_cert_list = larg; 1222 return (l); 1223 1224 case SSL_CTRL_SET_SESS_CACHE_SIZE: 1225 l = ctx->session_cache_size; 1226 ctx->session_cache_size = larg; 1227 return (l); 1228 case SSL_CTRL_GET_SESS_CACHE_SIZE: 1229 return (ctx->session_cache_size); 1230 case SSL_CTRL_SET_SESS_CACHE_MODE: 1231 l = ctx->session_cache_mode; 1232 ctx->session_cache_mode = larg; 1233 return (l); 1234 case SSL_CTRL_GET_SESS_CACHE_MODE: 1235 return (ctx->session_cache_mode); 1236 1237 case SSL_CTRL_SESS_NUMBER: 1238 return (lh_SSL_SESSION_num_items(ctx->sessions)); 1239 case SSL_CTRL_SESS_CONNECT: 1240 return (ctx->stats.sess_connect); 1241 case SSL_CTRL_SESS_CONNECT_GOOD: 1242 return (ctx->stats.sess_connect_good); 1243 case SSL_CTRL_SESS_CONNECT_RENEGOTIATE: 1244 return (ctx->stats.sess_connect_renegotiate); 1245 case SSL_CTRL_SESS_ACCEPT: 1246 return (ctx->stats.sess_accept); 1247 case SSL_CTRL_SESS_ACCEPT_GOOD: 1248 return (ctx->stats.sess_accept_good); 1249 case SSL_CTRL_SESS_ACCEPT_RENEGOTIATE: 1250 return (ctx->stats.sess_accept_renegotiate); 1251 case SSL_CTRL_SESS_HIT: 1252 return (ctx->stats.sess_hit); 1253 case SSL_CTRL_SESS_CB_HIT: 1254 return (ctx->stats.sess_cb_hit); 1255 case SSL_CTRL_SESS_MISSES: 1256 return (ctx->stats.sess_miss); 1257 case SSL_CTRL_SESS_TIMEOUTS: 1258 return (ctx->stats.sess_timeout); 1259 case SSL_CTRL_SESS_CACHE_FULL: 1260 return (ctx->stats.sess_cache_full); 1261 case SSL_CTRL_OPTIONS: 1262 return (ctx->options |= larg); 1263 case SSL_CTRL_CLEAR_OPTIONS: 1264 return (ctx->options &= ~larg); 1265 case SSL_CTRL_MODE: 1266 return (ctx->mode |= larg); 1267 case SSL_CTRL_CLEAR_MODE: 1268 return (ctx->mode &= ~larg); 1269 case SSL_CTRL_SET_MAX_SEND_FRAGMENT: 1270 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH) 1271 return 0; 1272 ctx->max_send_fragment = larg; 1273 return 1; 1274 case SSL_CTRL_CERT_FLAGS: 1275 return (ctx->cert->cert_flags |= larg); 1276 case SSL_CTRL_CLEAR_CERT_FLAGS: 1277 return (ctx->cert->cert_flags &= ~larg); 1278 default: 1279 return (ctx->method->ssl_ctx_ctrl(ctx, cmd, larg, parg)); 1280 } 1281 } 1282 1283 long SSL_CTX_callback_ctrl(SSL_CTX *ctx, int cmd, void (*fp) (void)) 1284 { 1285 switch (cmd) { 1286 case SSL_CTRL_SET_MSG_CALLBACK: 1287 ctx->msg_callback = (void (*) 1288 (int write_p, int version, int content_type, 1289 const void *buf, size_t len, SSL *ssl, 1290 void *arg))(fp); 1291 return 1; 1292 1293 default: 1294 return (ctx->method->ssl_ctx_callback_ctrl(ctx, cmd, fp)); 1295 } 1296 } 1297 1298 int ssl_cipher_id_cmp(const SSL_CIPHER *a, const SSL_CIPHER *b) 1299 { 1300 long l; 1301 1302 l = a->id - b->id; 1303 if (l == 0L) 1304 return (0); 1305 else 1306 return ((l > 0) ? 1 : -1); 1307 } 1308 1309 int ssl_cipher_ptr_id_cmp(const SSL_CIPHER *const *ap, 1310 const SSL_CIPHER *const *bp) 1311 { 1312 long l; 1313 1314 l = (*ap)->id - (*bp)->id; 1315 if (l == 0L) 1316 return (0); 1317 else 1318 return ((l > 0) ? 1 : -1); 1319 } 1320 1321 /** return a STACK of the ciphers available for the SSL and in order of 1322 * preference */ 1323 STACK_OF(SSL_CIPHER) *SSL_get_ciphers(const SSL *s) 1324 { 1325 if (s != NULL) { 1326 if (s->cipher_list != NULL) { 1327 return (s->cipher_list); 1328 } else if ((s->ctx != NULL) && (s->ctx->cipher_list != NULL)) { 1329 return (s->ctx->cipher_list); 1330 } 1331 } 1332 return (NULL); 1333 } 1334 1335 /** return a STACK of the ciphers available for the SSL and in order of 1336 * algorithm id */ 1337 STACK_OF(SSL_CIPHER) *ssl_get_ciphers_by_id(SSL *s) 1338 { 1339 if (s != NULL) { 1340 if (s->cipher_list_by_id != NULL) { 1341 return (s->cipher_list_by_id); 1342 } else if ((s->ctx != NULL) && (s->ctx->cipher_list_by_id != NULL)) { 1343 return (s->ctx->cipher_list_by_id); 1344 } 1345 } 1346 return (NULL); 1347 } 1348 1349 /** The old interface to get the same thing as SSL_get_ciphers() */ 1350 const char *SSL_get_cipher_list(const SSL *s, int n) 1351 { 1352 SSL_CIPHER *c; 1353 STACK_OF(SSL_CIPHER) *sk; 1354 1355 if (s == NULL) 1356 return (NULL); 1357 sk = SSL_get_ciphers(s); 1358 if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= n)) 1359 return (NULL); 1360 c = sk_SSL_CIPHER_value(sk, n); 1361 if (c == NULL) 1362 return (NULL); 1363 return (c->name); 1364 } 1365 1366 /** specify the ciphers to be used by default by the SSL_CTX */ 1367 int SSL_CTX_set_cipher_list(SSL_CTX *ctx, const char *str) 1368 { 1369 STACK_OF(SSL_CIPHER) *sk; 1370 1371 sk = ssl_create_cipher_list(ctx->method, &ctx->cipher_list, 1372 &ctx->cipher_list_by_id, str, ctx->cert); 1373 /* 1374 * ssl_create_cipher_list may return an empty stack if it was unable to 1375 * find a cipher matching the given rule string (for example if the rule 1376 * string specifies a cipher which has been disabled). This is not an 1377 * error as far as ssl_create_cipher_list is concerned, and hence 1378 * ctx->cipher_list and ctx->cipher_list_by_id has been updated. 1379 */ 1380 if (sk == NULL) 1381 return 0; 1382 else if (sk_SSL_CIPHER_num(sk) == 0) { 1383 SSLerr(SSL_F_SSL_CTX_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH); 1384 return 0; 1385 } 1386 return 1; 1387 } 1388 1389 /** specify the ciphers to be used by the SSL */ 1390 int SSL_set_cipher_list(SSL *s, const char *str) 1391 { 1392 STACK_OF(SSL_CIPHER) *sk; 1393 1394 sk = ssl_create_cipher_list(s->ctx->method, &s->cipher_list, 1395 &s->cipher_list_by_id, str, s->cert); 1396 /* see comment in SSL_CTX_set_cipher_list */ 1397 if (sk == NULL) 1398 return 0; 1399 else if (sk_SSL_CIPHER_num(sk) == 0) { 1400 SSLerr(SSL_F_SSL_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH); 1401 return 0; 1402 } 1403 return 1; 1404 } 1405 1406 /* works well for SSLv2, not so good for SSLv3 */ 1407 char *SSL_get_shared_ciphers(const SSL *s, char *buf, int len) 1408 { 1409 char *p; 1410 STACK_OF(SSL_CIPHER) *sk; 1411 SSL_CIPHER *c; 1412 int i; 1413 1414 if ((s->session == NULL) || (s->session->ciphers == NULL) || (len < 2)) 1415 return (NULL); 1416 1417 p = buf; 1418 sk = s->session->ciphers; 1419 1420 if (sk_SSL_CIPHER_num(sk) == 0) 1421 return NULL; 1422 1423 for (i = 0; i < sk_SSL_CIPHER_num(sk); i++) { 1424 int n; 1425 1426 c = sk_SSL_CIPHER_value(sk, i); 1427 n = strlen(c->name); 1428 if (n + 1 > len) { 1429 if (p != buf) 1430 --p; 1431 *p = '\0'; 1432 return buf; 1433 } 1434 strcpy(p, c->name); 1435 p += n; 1436 *(p++) = ':'; 1437 len -= n + 1; 1438 } 1439 p[-1] = '\0'; 1440 return (buf); 1441 } 1442 1443 int ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk, 1444 unsigned char *p, 1445 int (*put_cb) (const SSL_CIPHER *, 1446 unsigned char *)) 1447 { 1448 int i, j = 0; 1449 SSL_CIPHER *c; 1450 CERT *ct = s->cert; 1451 unsigned char *q; 1452 int empty_reneg_info_scsv = !s->renegotiate; 1453 /* Set disabled masks for this session */ 1454 ssl_set_client_disabled(s); 1455 1456 if (sk == NULL) 1457 return (0); 1458 q = p; 1459 if (put_cb == NULL) 1460 put_cb = s->method->put_cipher_by_char; 1461 1462 for (i = 0; i < sk_SSL_CIPHER_num(sk); i++) { 1463 c = sk_SSL_CIPHER_value(sk, i); 1464 /* Skip disabled ciphers */ 1465 if (c->algorithm_ssl & ct->mask_ssl || 1466 c->algorithm_mkey & ct->mask_k || c->algorithm_auth & ct->mask_a) 1467 continue; 1468 #ifdef OPENSSL_SSL_DEBUG_BROKEN_PROTOCOL 1469 if (c->id == SSL3_CK_SCSV) { 1470 if (!empty_reneg_info_scsv) 1471 continue; 1472 else 1473 empty_reneg_info_scsv = 0; 1474 } 1475 #endif 1476 j = put_cb(c, p); 1477 p += j; 1478 } 1479 /* 1480 * If p == q, no ciphers; caller indicates an error. Otherwise, add 1481 * applicable SCSVs. 1482 */ 1483 if (p != q) { 1484 if (empty_reneg_info_scsv) { 1485 static SSL_CIPHER scsv = { 1486 0, NULL, SSL3_CK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0 1487 }; 1488 j = put_cb(&scsv, p); 1489 p += j; 1490 #ifdef OPENSSL_RI_DEBUG 1491 fprintf(stderr, 1492 "TLS_EMPTY_RENEGOTIATION_INFO_SCSV sent by client\n"); 1493 #endif 1494 } 1495 if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV) { 1496 static SSL_CIPHER scsv = { 1497 0, NULL, SSL3_CK_FALLBACK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0 1498 }; 1499 j = put_cb(&scsv, p); 1500 p += j; 1501 } 1502 } 1503 1504 return (p - q); 1505 } 1506 1507 STACK_OF(SSL_CIPHER) *ssl_bytes_to_cipher_list(SSL *s, unsigned char *p, 1508 int num, 1509 STACK_OF(SSL_CIPHER) **skp) 1510 { 1511 const SSL_CIPHER *c; 1512 STACK_OF(SSL_CIPHER) *sk; 1513 int i, n; 1514 1515 if (s->s3) 1516 s->s3->send_connection_binding = 0; 1517 1518 n = ssl_put_cipher_by_char(s, NULL, NULL); 1519 if (n == 0 || (num % n) != 0) { 1520 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST, 1521 SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST); 1522 return (NULL); 1523 } 1524 if ((skp == NULL) || (*skp == NULL)) { 1525 sk = sk_SSL_CIPHER_new_null(); /* change perhaps later */ 1526 if(sk == NULL) { 1527 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST, ERR_R_MALLOC_FAILURE); 1528 return NULL; 1529 } 1530 } else { 1531 sk = *skp; 1532 sk_SSL_CIPHER_zero(sk); 1533 } 1534 1535 if (s->cert->ciphers_raw) 1536 OPENSSL_free(s->cert->ciphers_raw); 1537 s->cert->ciphers_raw = BUF_memdup(p, num); 1538 if (s->cert->ciphers_raw == NULL) { 1539 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST, ERR_R_MALLOC_FAILURE); 1540 goto err; 1541 } 1542 s->cert->ciphers_rawlen = (size_t)num; 1543 1544 for (i = 0; i < num; i += n) { 1545 /* Check for TLS_EMPTY_RENEGOTIATION_INFO_SCSV */ 1546 if (s->s3 && (n != 3 || !p[0]) && 1547 (p[n - 2] == ((SSL3_CK_SCSV >> 8) & 0xff)) && 1548 (p[n - 1] == (SSL3_CK_SCSV & 0xff))) { 1549 /* SCSV fatal if renegotiating */ 1550 if (s->renegotiate) { 1551 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST, 1552 SSL_R_SCSV_RECEIVED_WHEN_RENEGOTIATING); 1553 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); 1554 goto err; 1555 } 1556 s->s3->send_connection_binding = 1; 1557 p += n; 1558 #ifdef OPENSSL_RI_DEBUG 1559 fprintf(stderr, "SCSV received by server\n"); 1560 #endif 1561 continue; 1562 } 1563 1564 /* Check for TLS_FALLBACK_SCSV */ 1565 if ((n != 3 || !p[0]) && 1566 (p[n - 2] == ((SSL3_CK_FALLBACK_SCSV >> 8) & 0xff)) && 1567 (p[n - 1] == (SSL3_CK_FALLBACK_SCSV & 0xff))) { 1568 /* 1569 * The SCSV indicates that the client previously tried a higher 1570 * version. Fail if the current version is an unexpected 1571 * downgrade. 1572 */ 1573 if (!SSL_ctrl(s, SSL_CTRL_CHECK_PROTO_VERSION, 0, NULL)) { 1574 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST, 1575 SSL_R_INAPPROPRIATE_FALLBACK); 1576 if (s->s3) 1577 ssl3_send_alert(s, SSL3_AL_FATAL, 1578 SSL_AD_INAPPROPRIATE_FALLBACK); 1579 goto err; 1580 } 1581 p += n; 1582 continue; 1583 } 1584 1585 c = ssl_get_cipher_by_char(s, p); 1586 p += n; 1587 if (c != NULL) { 1588 if (!sk_SSL_CIPHER_push(sk, c)) { 1589 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST, ERR_R_MALLOC_FAILURE); 1590 goto err; 1591 } 1592 } 1593 } 1594 1595 if (skp != NULL) 1596 *skp = sk; 1597 return (sk); 1598 err: 1599 if ((skp == NULL) || (*skp == NULL)) 1600 sk_SSL_CIPHER_free(sk); 1601 return (NULL); 1602 } 1603 1604 #ifndef OPENSSL_NO_TLSEXT 1605 /** return a servername extension value if provided in Client Hello, or NULL. 1606 * So far, only host_name types are defined (RFC 3546). 1607 */ 1608 1609 const char *SSL_get_servername(const SSL *s, const int type) 1610 { 1611 if (type != TLSEXT_NAMETYPE_host_name) 1612 return NULL; 1613 1614 return s->session && !s->tlsext_hostname ? 1615 s->session->tlsext_hostname : s->tlsext_hostname; 1616 } 1617 1618 int SSL_get_servername_type(const SSL *s) 1619 { 1620 if (s->session 1621 && (!s->tlsext_hostname ? s->session-> 1622 tlsext_hostname : s->tlsext_hostname)) 1623 return TLSEXT_NAMETYPE_host_name; 1624 return -1; 1625 } 1626 1627 /* 1628 * SSL_select_next_proto implements the standard protocol selection. It is 1629 * expected that this function is called from the callback set by 1630 * SSL_CTX_set_next_proto_select_cb. The protocol data is assumed to be a 1631 * vector of 8-bit, length prefixed byte strings. The length byte itself is 1632 * not included in the length. A byte string of length 0 is invalid. No byte 1633 * string may be truncated. The current, but experimental algorithm for 1634 * selecting the protocol is: 1) If the server doesn't support NPN then this 1635 * is indicated to the callback. In this case, the client application has to 1636 * abort the connection or have a default application level protocol. 2) If 1637 * the server supports NPN, but advertises an empty list then the client 1638 * selects the first protcol in its list, but indicates via the API that this 1639 * fallback case was enacted. 3) Otherwise, the client finds the first 1640 * protocol in the server's list that it supports and selects this protocol. 1641 * This is because it's assumed that the server has better information about 1642 * which protocol a client should use. 4) If the client doesn't support any 1643 * of the server's advertised protocols, then this is treated the same as 1644 * case 2. It returns either OPENSSL_NPN_NEGOTIATED if a common protocol was 1645 * found, or OPENSSL_NPN_NO_OVERLAP if the fallback case was reached. 1646 */ 1647 int SSL_select_next_proto(unsigned char **out, unsigned char *outlen, 1648 const unsigned char *server, 1649 unsigned int server_len, 1650 const unsigned char *client, 1651 unsigned int client_len) 1652 { 1653 unsigned int i, j; 1654 const unsigned char *result; 1655 int status = OPENSSL_NPN_UNSUPPORTED; 1656 1657 /* 1658 * For each protocol in server preference order, see if we support it. 1659 */ 1660 for (i = 0; i < server_len;) { 1661 for (j = 0; j < client_len;) { 1662 if (server[i] == client[j] && 1663 memcmp(&server[i + 1], &client[j + 1], server[i]) == 0) { 1664 /* We found a match */ 1665 result = &server[i]; 1666 status = OPENSSL_NPN_NEGOTIATED; 1667 goto found; 1668 } 1669 j += client[j]; 1670 j++; 1671 } 1672 i += server[i]; 1673 i++; 1674 } 1675 1676 /* There's no overlap between our protocols and the server's list. */ 1677 result = client; 1678 status = OPENSSL_NPN_NO_OVERLAP; 1679 1680 found: 1681 *out = (unsigned char *)result + 1; 1682 *outlen = result[0]; 1683 return status; 1684 } 1685 1686 # ifndef OPENSSL_NO_NEXTPROTONEG 1687 /* 1688 * SSL_get0_next_proto_negotiated sets *data and *len to point to the 1689 * client's requested protocol for this connection and returns 0. If the 1690 * client didn't request any protocol, then *data is set to NULL. Note that 1691 * the client can request any protocol it chooses. The value returned from 1692 * this function need not be a member of the list of supported protocols 1693 * provided by the callback. 1694 */ 1695 void SSL_get0_next_proto_negotiated(const SSL *s, const unsigned char **data, 1696 unsigned *len) 1697 { 1698 *data = s->next_proto_negotiated; 1699 if (!*data) { 1700 *len = 0; 1701 } else { 1702 *len = s->next_proto_negotiated_len; 1703 } 1704 } 1705 1706 /* 1707 * SSL_CTX_set_next_protos_advertised_cb sets a callback that is called when 1708 * a TLS server needs a list of supported protocols for Next Protocol 1709 * Negotiation. The returned list must be in wire format. The list is 1710 * returned by setting |out| to point to it and |outlen| to its length. This 1711 * memory will not be modified, but one should assume that the SSL* keeps a 1712 * reference to it. The callback should return SSL_TLSEXT_ERR_OK if it 1713 * wishes to advertise. Otherwise, no such extension will be included in the 1714 * ServerHello. 1715 */ 1716 void SSL_CTX_set_next_protos_advertised_cb(SSL_CTX *ctx, 1717 int (*cb) (SSL *ssl, 1718 const unsigned char 1719 **out, 1720 unsigned int *outlen, 1721 void *arg), void *arg) 1722 { 1723 ctx->next_protos_advertised_cb = cb; 1724 ctx->next_protos_advertised_cb_arg = arg; 1725 } 1726 1727 /* 1728 * SSL_CTX_set_next_proto_select_cb sets a callback that is called when a 1729 * client needs to select a protocol from the server's provided list. |out| 1730 * must be set to point to the selected protocol (which may be within |in|). 1731 * The length of the protocol name must be written into |outlen|. The 1732 * server's advertised protocols are provided in |in| and |inlen|. The 1733 * callback can assume that |in| is syntactically valid. The client must 1734 * select a protocol. It is fatal to the connection if this callback returns 1735 * a value other than SSL_TLSEXT_ERR_OK. 1736 */ 1737 void SSL_CTX_set_next_proto_select_cb(SSL_CTX *ctx, 1738 int (*cb) (SSL *s, unsigned char **out, 1739 unsigned char *outlen, 1740 const unsigned char *in, 1741 unsigned int inlen, 1742 void *arg), void *arg) 1743 { 1744 ctx->next_proto_select_cb = cb; 1745 ctx->next_proto_select_cb_arg = arg; 1746 } 1747 # endif 1748 1749 /* 1750 * SSL_CTX_set_alpn_protos sets the ALPN protocol list on |ctx| to |protos|. 1751 * |protos| must be in wire-format (i.e. a series of non-empty, 8-bit 1752 * length-prefixed strings). Returns 0 on success. 1753 */ 1754 int SSL_CTX_set_alpn_protos(SSL_CTX *ctx, const unsigned char *protos, 1755 unsigned protos_len) 1756 { 1757 if (ctx->alpn_client_proto_list) 1758 OPENSSL_free(ctx->alpn_client_proto_list); 1759 1760 ctx->alpn_client_proto_list = OPENSSL_malloc(protos_len); 1761 if (!ctx->alpn_client_proto_list) 1762 return 1; 1763 memcpy(ctx->alpn_client_proto_list, protos, protos_len); 1764 ctx->alpn_client_proto_list_len = protos_len; 1765 1766 return 0; 1767 } 1768 1769 /* 1770 * SSL_set_alpn_protos sets the ALPN protocol list on |ssl| to |protos|. 1771 * |protos| must be in wire-format (i.e. a series of non-empty, 8-bit 1772 * length-prefixed strings). Returns 0 on success. 1773 */ 1774 int SSL_set_alpn_protos(SSL *ssl, const unsigned char *protos, 1775 unsigned protos_len) 1776 { 1777 if (ssl->alpn_client_proto_list) 1778 OPENSSL_free(ssl->alpn_client_proto_list); 1779 1780 ssl->alpn_client_proto_list = OPENSSL_malloc(protos_len); 1781 if (!ssl->alpn_client_proto_list) 1782 return 1; 1783 memcpy(ssl->alpn_client_proto_list, protos, protos_len); 1784 ssl->alpn_client_proto_list_len = protos_len; 1785 1786 return 0; 1787 } 1788 1789 /* 1790 * SSL_CTX_set_alpn_select_cb sets a callback function on |ctx| that is 1791 * called during ClientHello processing in order to select an ALPN protocol 1792 * from the client's list of offered protocols. 1793 */ 1794 void SSL_CTX_set_alpn_select_cb(SSL_CTX *ctx, 1795 int (*cb) (SSL *ssl, 1796 const unsigned char **out, 1797 unsigned char *outlen, 1798 const unsigned char *in, 1799 unsigned int inlen, 1800 void *arg), void *arg) 1801 { 1802 ctx->alpn_select_cb = cb; 1803 ctx->alpn_select_cb_arg = arg; 1804 } 1805 1806 /* 1807 * SSL_get0_alpn_selected gets the selected ALPN protocol (if any) from 1808 * |ssl|. On return it sets |*data| to point to |*len| bytes of protocol name 1809 * (not including the leading length-prefix byte). If the server didn't 1810 * respond with a negotiated protocol then |*len| will be zero. 1811 */ 1812 void SSL_get0_alpn_selected(const SSL *ssl, const unsigned char **data, 1813 unsigned *len) 1814 { 1815 *data = NULL; 1816 if (ssl->s3) 1817 *data = ssl->s3->alpn_selected; 1818 if (*data == NULL) 1819 *len = 0; 1820 else 1821 *len = ssl->s3->alpn_selected_len; 1822 } 1823 1824 #endif /* !OPENSSL_NO_TLSEXT */ 1825 1826 int SSL_export_keying_material(SSL *s, unsigned char *out, size_t olen, 1827 const char *label, size_t llen, 1828 const unsigned char *p, size_t plen, 1829 int use_context) 1830 { 1831 if (s->version < TLS1_VERSION) 1832 return -1; 1833 1834 return s->method->ssl3_enc->export_keying_material(s, out, olen, label, 1835 llen, p, plen, 1836 use_context); 1837 } 1838 1839 static unsigned long ssl_session_hash(const SSL_SESSION *a) 1840 { 1841 unsigned long l; 1842 1843 l = (unsigned long) 1844 ((unsigned int)a->session_id[0]) | 1845 ((unsigned int)a->session_id[1] << 8L) | 1846 ((unsigned long)a->session_id[2] << 16L) | 1847 ((unsigned long)a->session_id[3] << 24L); 1848 return (l); 1849 } 1850 1851 /* 1852 * NB: If this function (or indeed the hash function which uses a sort of 1853 * coarser function than this one) is changed, ensure 1854 * SSL_CTX_has_matching_session_id() is checked accordingly. It relies on 1855 * being able to construct an SSL_SESSION that will collide with any existing 1856 * session with a matching session ID. 1857 */ 1858 static int ssl_session_cmp(const SSL_SESSION *a, const SSL_SESSION *b) 1859 { 1860 if (a->ssl_version != b->ssl_version) 1861 return (1); 1862 if (a->session_id_length != b->session_id_length) 1863 return (1); 1864 return (memcmp(a->session_id, b->session_id, a->session_id_length)); 1865 } 1866 1867 /* 1868 * These wrapper functions should remain rather than redeclaring 1869 * SSL_SESSION_hash and SSL_SESSION_cmp for void* types and casting each 1870 * variable. The reason is that the functions aren't static, they're exposed 1871 * via ssl.h. 1872 */ 1873 static IMPLEMENT_LHASH_HASH_FN(ssl_session, SSL_SESSION) 1874 static IMPLEMENT_LHASH_COMP_FN(ssl_session, SSL_SESSION) 1875 1876 SSL_CTX *SSL_CTX_new(const SSL_METHOD *meth) 1877 { 1878 SSL_CTX *ret = NULL; 1879 1880 if (meth == NULL) { 1881 SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_NULL_SSL_METHOD_PASSED); 1882 return (NULL); 1883 } 1884 #ifdef OPENSSL_FIPS 1885 if (FIPS_mode() && (meth->version < TLS1_VERSION)) { 1886 SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE); 1887 return NULL; 1888 } 1889 #endif 1890 1891 if (SSL_get_ex_data_X509_STORE_CTX_idx() < 0) { 1892 SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_X509_VERIFICATION_SETUP_PROBLEMS); 1893 goto err; 1894 } 1895 ret = (SSL_CTX *)OPENSSL_malloc(sizeof(SSL_CTX)); 1896 if (ret == NULL) 1897 goto err; 1898 1899 memset(ret, 0, sizeof(SSL_CTX)); 1900 1901 ret->method = meth; 1902 1903 ret->cert_store = NULL; 1904 ret->session_cache_mode = SSL_SESS_CACHE_SERVER; 1905 ret->session_cache_size = SSL_SESSION_CACHE_MAX_SIZE_DEFAULT; 1906 ret->session_cache_head = NULL; 1907 ret->session_cache_tail = NULL; 1908 1909 /* We take the system default */ 1910 ret->session_timeout = meth->get_timeout(); 1911 1912 ret->new_session_cb = 0; 1913 ret->remove_session_cb = 0; 1914 ret->get_session_cb = 0; 1915 ret->generate_session_id = 0; 1916 1917 memset((char *)&ret->stats, 0, sizeof(ret->stats)); 1918 1919 ret->references = 1; 1920 ret->quiet_shutdown = 0; 1921 1922 /* ret->cipher=NULL;*/ 1923 /*- 1924 ret->s2->challenge=NULL; 1925 ret->master_key=NULL; 1926 ret->key_arg=NULL; 1927 ret->s2->conn_id=NULL; */ 1928 1929 ret->info_callback = NULL; 1930 1931 ret->app_verify_callback = 0; 1932 ret->app_verify_arg = NULL; 1933 1934 ret->max_cert_list = SSL_MAX_CERT_LIST_DEFAULT; 1935 ret->read_ahead = 0; 1936 ret->msg_callback = 0; 1937 ret->msg_callback_arg = NULL; 1938 ret->verify_mode = SSL_VERIFY_NONE; 1939 #if 0 1940 ret->verify_depth = -1; /* Don't impose a limit (but x509_lu.c does) */ 1941 #endif 1942 ret->sid_ctx_length = 0; 1943 ret->default_verify_callback = NULL; 1944 if ((ret->cert = ssl_cert_new()) == NULL) 1945 goto err; 1946 1947 ret->default_passwd_callback = 0; 1948 ret->default_passwd_callback_userdata = NULL; 1949 ret->client_cert_cb = 0; 1950 ret->app_gen_cookie_cb = 0; 1951 ret->app_verify_cookie_cb = 0; 1952 1953 ret->sessions = lh_SSL_SESSION_new(); 1954 if (ret->sessions == NULL) 1955 goto err; 1956 ret->cert_store = X509_STORE_new(); 1957 if (ret->cert_store == NULL) 1958 goto err; 1959 1960 ssl_create_cipher_list(ret->method, 1961 &ret->cipher_list, &ret->cipher_list_by_id, 1962 meth->version == 1963 SSL2_VERSION ? "SSLv2" : SSL_DEFAULT_CIPHER_LIST, 1964 ret->cert); 1965 if (ret->cipher_list == NULL || sk_SSL_CIPHER_num(ret->cipher_list) <= 0) { 1966 SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_LIBRARY_HAS_NO_CIPHERS); 1967 goto err2; 1968 } 1969 1970 ret->param = X509_VERIFY_PARAM_new(); 1971 if (!ret->param) 1972 goto err; 1973 1974 if ((ret->rsa_md5 = EVP_get_digestbyname("ssl2-md5")) == NULL) { 1975 SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_UNABLE_TO_LOAD_SSL2_MD5_ROUTINES); 1976 goto err2; 1977 } 1978 if ((ret->md5 = EVP_get_digestbyname("ssl3-md5")) == NULL) { 1979 SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_UNABLE_TO_LOAD_SSL3_MD5_ROUTINES); 1980 goto err2; 1981 } 1982 if ((ret->sha1 = EVP_get_digestbyname("ssl3-sha1")) == NULL) { 1983 SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_UNABLE_TO_LOAD_SSL3_SHA1_ROUTINES); 1984 goto err2; 1985 } 1986 1987 if ((ret->client_CA = sk_X509_NAME_new_null()) == NULL) 1988 goto err; 1989 1990 CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_CTX, ret, &ret->ex_data); 1991 1992 ret->extra_certs = NULL; 1993 /* No compression for DTLS */ 1994 if (!(meth->ssl3_enc->enc_flags & SSL_ENC_FLAG_DTLS)) 1995 ret->comp_methods = SSL_COMP_get_compression_methods(); 1996 1997 ret->max_send_fragment = SSL3_RT_MAX_PLAIN_LENGTH; 1998 1999 #ifndef OPENSSL_NO_TLSEXT 2000 ret->tlsext_servername_callback = 0; 2001 ret->tlsext_servername_arg = NULL; 2002 /* Setup RFC4507 ticket keys */ 2003 if ((RAND_pseudo_bytes(ret->tlsext_tick_key_name, 16) <= 0) 2004 || (RAND_bytes(ret->tlsext_tick_hmac_key, 16) <= 0) 2005 || (RAND_bytes(ret->tlsext_tick_aes_key, 16) <= 0)) 2006 ret->options |= SSL_OP_NO_TICKET; 2007 2008 ret->tlsext_status_cb = 0; 2009 ret->tlsext_status_arg = NULL; 2010 2011 # ifndef OPENSSL_NO_NEXTPROTONEG 2012 ret->next_protos_advertised_cb = 0; 2013 ret->next_proto_select_cb = 0; 2014 # endif 2015 #endif 2016 #ifndef OPENSSL_NO_PSK 2017 ret->psk_identity_hint = NULL; 2018 ret->psk_client_callback = NULL; 2019 ret->psk_server_callback = NULL; 2020 #endif 2021 #ifndef OPENSSL_NO_SRP 2022 SSL_CTX_SRP_CTX_init(ret); 2023 #endif 2024 #ifndef OPENSSL_NO_BUF_FREELISTS 2025 ret->freelist_max_len = SSL_MAX_BUF_FREELIST_LEN_DEFAULT; 2026 ret->rbuf_freelist = OPENSSL_malloc(sizeof(SSL3_BUF_FREELIST)); 2027 if (!ret->rbuf_freelist) 2028 goto err; 2029 ret->rbuf_freelist->chunklen = 0; 2030 ret->rbuf_freelist->len = 0; 2031 ret->rbuf_freelist->head = NULL; 2032 ret->wbuf_freelist = OPENSSL_malloc(sizeof(SSL3_BUF_FREELIST)); 2033 if (!ret->wbuf_freelist) { 2034 OPENSSL_free(ret->rbuf_freelist); 2035 goto err; 2036 } 2037 ret->wbuf_freelist->chunklen = 0; 2038 ret->wbuf_freelist->len = 0; 2039 ret->wbuf_freelist->head = NULL; 2040 #endif 2041 #ifndef OPENSSL_NO_ENGINE 2042 ret->client_cert_engine = NULL; 2043 # ifdef OPENSSL_SSL_CLIENT_ENGINE_AUTO 2044 # define eng_strx(x) #x 2045 # define eng_str(x) eng_strx(x) 2046 /* Use specific client engine automatically... ignore errors */ 2047 { 2048 ENGINE *eng; 2049 eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO)); 2050 if (!eng) { 2051 ERR_clear_error(); 2052 ENGINE_load_builtin_engines(); 2053 eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO)); 2054 } 2055 if (!eng || !SSL_CTX_set_client_cert_engine(ret, eng)) 2056 ERR_clear_error(); 2057 } 2058 # endif 2059 #endif 2060 /* 2061 * Default is to connect to non-RI servers. When RI is more widely 2062 * deployed might change this. 2063 */ 2064 ret->options |= SSL_OP_LEGACY_SERVER_CONNECT; 2065 2066 /* 2067 * Disable SSLv2 by default, callers that want to enable SSLv2 will have to 2068 * explicitly clear this option via either of SSL_CTX_clear_options() or 2069 * SSL_clear_options(). 2070 */ 2071 ret->options |= SSL_OP_NO_SSLv2; 2072 2073 return (ret); 2074 err: 2075 SSLerr(SSL_F_SSL_CTX_NEW, ERR_R_MALLOC_FAILURE); 2076 err2: 2077 if (ret != NULL) 2078 SSL_CTX_free(ret); 2079 return (NULL); 2080 } 2081 2082 #if 0 2083 static void SSL_COMP_free(SSL_COMP *comp) 2084 { 2085 OPENSSL_free(comp); 2086 } 2087 #endif 2088 2089 #ifndef OPENSSL_NO_BUF_FREELISTS 2090 static void ssl_buf_freelist_free(SSL3_BUF_FREELIST *list) 2091 { 2092 SSL3_BUF_FREELIST_ENTRY *ent, *next; 2093 for (ent = list->head; ent; ent = next) { 2094 next = ent->next; 2095 OPENSSL_free(ent); 2096 } 2097 OPENSSL_free(list); 2098 } 2099 #endif 2100 2101 void SSL_CTX_free(SSL_CTX *a) 2102 { 2103 int i; 2104 2105 if (a == NULL) 2106 return; 2107 2108 i = CRYPTO_add(&a->references, -1, CRYPTO_LOCK_SSL_CTX); 2109 #ifdef REF_PRINT 2110 REF_PRINT("SSL_CTX", a); 2111 #endif 2112 if (i > 0) 2113 return; 2114 #ifdef REF_CHECK 2115 if (i < 0) { 2116 fprintf(stderr, "SSL_CTX_free, bad reference count\n"); 2117 abort(); /* ok */ 2118 } 2119 #endif 2120 2121 if (a->param) 2122 X509_VERIFY_PARAM_free(a->param); 2123 2124 /* 2125 * Free internal session cache. However: the remove_cb() may reference 2126 * the ex_data of SSL_CTX, thus the ex_data store can only be removed 2127 * after the sessions were flushed. 2128 * As the ex_data handling routines might also touch the session cache, 2129 * the most secure solution seems to be: empty (flush) the cache, then 2130 * free ex_data, then finally free the cache. 2131 * (See ticket [openssl.org #212].) 2132 */ 2133 if (a->sessions != NULL) 2134 SSL_CTX_flush_sessions(a, 0); 2135 2136 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_CTX, a, &a->ex_data); 2137 2138 if (a->sessions != NULL) 2139 lh_SSL_SESSION_free(a->sessions); 2140 2141 if (a->cert_store != NULL) 2142 X509_STORE_free(a->cert_store); 2143 if (a->cipher_list != NULL) 2144 sk_SSL_CIPHER_free(a->cipher_list); 2145 if (a->cipher_list_by_id != NULL) 2146 sk_SSL_CIPHER_free(a->cipher_list_by_id); 2147 if (a->cert != NULL) 2148 ssl_cert_free(a->cert); 2149 if (a->client_CA != NULL) 2150 sk_X509_NAME_pop_free(a->client_CA, X509_NAME_free); 2151 if (a->extra_certs != NULL) 2152 sk_X509_pop_free(a->extra_certs, X509_free); 2153 #if 0 /* This should never be done, since it 2154 * removes a global database */ 2155 if (a->comp_methods != NULL) 2156 sk_SSL_COMP_pop_free(a->comp_methods, SSL_COMP_free); 2157 #else 2158 a->comp_methods = NULL; 2159 #endif 2160 2161 #ifndef OPENSSL_NO_SRTP 2162 if (a->srtp_profiles) 2163 sk_SRTP_PROTECTION_PROFILE_free(a->srtp_profiles); 2164 #endif 2165 2166 #ifndef OPENSSL_NO_PSK 2167 if (a->psk_identity_hint) 2168 OPENSSL_free(a->psk_identity_hint); 2169 #endif 2170 #ifndef OPENSSL_NO_SRP 2171 SSL_CTX_SRP_CTX_free(a); 2172 #endif 2173 #ifndef OPENSSL_NO_ENGINE 2174 if (a->client_cert_engine) 2175 ENGINE_finish(a->client_cert_engine); 2176 #endif 2177 2178 #ifndef OPENSSL_NO_BUF_FREELISTS 2179 if (a->wbuf_freelist) 2180 ssl_buf_freelist_free(a->wbuf_freelist); 2181 if (a->rbuf_freelist) 2182 ssl_buf_freelist_free(a->rbuf_freelist); 2183 #endif 2184 #ifndef OPENSSL_NO_TLSEXT 2185 # ifndef OPENSSL_NO_EC 2186 if (a->tlsext_ecpointformatlist) 2187 OPENSSL_free(a->tlsext_ecpointformatlist); 2188 if (a->tlsext_ellipticcurvelist) 2189 OPENSSL_free(a->tlsext_ellipticcurvelist); 2190 # endif /* OPENSSL_NO_EC */ 2191 if (a->alpn_client_proto_list != NULL) 2192 OPENSSL_free(a->alpn_client_proto_list); 2193 #endif 2194 2195 OPENSSL_free(a); 2196 } 2197 2198 void SSL_CTX_set_default_passwd_cb(SSL_CTX *ctx, pem_password_cb *cb) 2199 { 2200 ctx->default_passwd_callback = cb; 2201 } 2202 2203 void SSL_CTX_set_default_passwd_cb_userdata(SSL_CTX *ctx, void *u) 2204 { 2205 ctx->default_passwd_callback_userdata = u; 2206 } 2207 2208 void SSL_CTX_set_cert_verify_callback(SSL_CTX *ctx, 2209 int (*cb) (X509_STORE_CTX *, void *), 2210 void *arg) 2211 { 2212 ctx->app_verify_callback = cb; 2213 ctx->app_verify_arg = arg; 2214 } 2215 2216 void SSL_CTX_set_verify(SSL_CTX *ctx, int mode, 2217 int (*cb) (int, X509_STORE_CTX *)) 2218 { 2219 ctx->verify_mode = mode; 2220 ctx->default_verify_callback = cb; 2221 } 2222 2223 void SSL_CTX_set_verify_depth(SSL_CTX *ctx, int depth) 2224 { 2225 X509_VERIFY_PARAM_set_depth(ctx->param, depth); 2226 } 2227 2228 void SSL_CTX_set_cert_cb(SSL_CTX *c, int (*cb) (SSL *ssl, void *arg), 2229 void *arg) 2230 { 2231 ssl_cert_set_cert_cb(c->cert, cb, arg); 2232 } 2233 2234 void SSL_set_cert_cb(SSL *s, int (*cb) (SSL *ssl, void *arg), void *arg) 2235 { 2236 ssl_cert_set_cert_cb(s->cert, cb, arg); 2237 } 2238 2239 void ssl_set_cert_masks(CERT *c, const SSL_CIPHER *cipher) 2240 { 2241 CERT_PKEY *cpk; 2242 int rsa_enc, rsa_tmp, rsa_sign, dh_tmp, dh_rsa, dh_dsa, dsa_sign; 2243 int rsa_enc_export, dh_rsa_export, dh_dsa_export; 2244 int rsa_tmp_export, dh_tmp_export, kl; 2245 unsigned long mask_k, mask_a, emask_k, emask_a; 2246 #ifndef OPENSSL_NO_ECDSA 2247 int have_ecc_cert, ecdsa_ok, ecc_pkey_size; 2248 #endif 2249 #ifndef OPENSSL_NO_ECDH 2250 int have_ecdh_tmp, ecdh_ok; 2251 #endif 2252 #ifndef OPENSSL_NO_EC 2253 X509 *x = NULL; 2254 EVP_PKEY *ecc_pkey = NULL; 2255 int signature_nid = 0, pk_nid = 0, md_nid = 0; 2256 #endif 2257 if (c == NULL) 2258 return; 2259 2260 kl = SSL_C_EXPORT_PKEYLENGTH(cipher); 2261 2262 #ifndef OPENSSL_NO_RSA 2263 rsa_tmp = (c->rsa_tmp != NULL || c->rsa_tmp_cb != NULL); 2264 rsa_tmp_export = (c->rsa_tmp_cb != NULL || 2265 (rsa_tmp && RSA_size(c->rsa_tmp) * 8 <= kl)); 2266 #else 2267 rsa_tmp = rsa_tmp_export = 0; 2268 #endif 2269 #ifndef OPENSSL_NO_DH 2270 dh_tmp = (c->dh_tmp != NULL || c->dh_tmp_cb != NULL); 2271 dh_tmp_export = (c->dh_tmp_cb != NULL || 2272 (dh_tmp && DH_size(c->dh_tmp) * 8 <= kl)); 2273 #else 2274 dh_tmp = dh_tmp_export = 0; 2275 #endif 2276 2277 #ifndef OPENSSL_NO_ECDH 2278 have_ecdh_tmp = (c->ecdh_tmp || c->ecdh_tmp_cb || c->ecdh_tmp_auto); 2279 #endif 2280 cpk = &(c->pkeys[SSL_PKEY_RSA_ENC]); 2281 rsa_enc = cpk->valid_flags & CERT_PKEY_VALID; 2282 rsa_enc_export = (rsa_enc && EVP_PKEY_size(cpk->privatekey) * 8 <= kl); 2283 cpk = &(c->pkeys[SSL_PKEY_RSA_SIGN]); 2284 rsa_sign = cpk->valid_flags & CERT_PKEY_SIGN; 2285 cpk = &(c->pkeys[SSL_PKEY_DSA_SIGN]); 2286 dsa_sign = cpk->valid_flags & CERT_PKEY_SIGN; 2287 cpk = &(c->pkeys[SSL_PKEY_DH_RSA]); 2288 dh_rsa = cpk->valid_flags & CERT_PKEY_VALID; 2289 dh_rsa_export = (dh_rsa && EVP_PKEY_size(cpk->privatekey) * 8 <= kl); 2290 cpk = &(c->pkeys[SSL_PKEY_DH_DSA]); 2291 /* FIX THIS EAY EAY EAY */ 2292 dh_dsa = cpk->valid_flags & CERT_PKEY_VALID; 2293 dh_dsa_export = (dh_dsa && EVP_PKEY_size(cpk->privatekey) * 8 <= kl); 2294 cpk = &(c->pkeys[SSL_PKEY_ECC]); 2295 #ifndef OPENSSL_NO_EC 2296 have_ecc_cert = cpk->valid_flags & CERT_PKEY_VALID; 2297 #endif 2298 mask_k = 0; 2299 mask_a = 0; 2300 emask_k = 0; 2301 emask_a = 0; 2302 2303 #ifdef CIPHER_DEBUG 2304 fprintf(stderr, 2305 "rt=%d rte=%d dht=%d ecdht=%d re=%d ree=%d rs=%d ds=%d dhr=%d dhd=%d\n", 2306 rsa_tmp, rsa_tmp_export, dh_tmp, have_ecdh_tmp, rsa_enc, 2307 rsa_enc_export, rsa_sign, dsa_sign, dh_rsa, dh_dsa); 2308 #endif 2309 2310 cpk = &(c->pkeys[SSL_PKEY_GOST01]); 2311 if (cpk->x509 != NULL && cpk->privatekey != NULL) { 2312 mask_k |= SSL_kGOST; 2313 mask_a |= SSL_aGOST01; 2314 } 2315 cpk = &(c->pkeys[SSL_PKEY_GOST94]); 2316 if (cpk->x509 != NULL && cpk->privatekey != NULL) { 2317 mask_k |= SSL_kGOST; 2318 mask_a |= SSL_aGOST94; 2319 } 2320 2321 if (rsa_enc || (rsa_tmp && rsa_sign)) 2322 mask_k |= SSL_kRSA; 2323 if (rsa_enc_export || (rsa_tmp_export && (rsa_sign || rsa_enc))) 2324 emask_k |= SSL_kRSA; 2325 2326 #if 0 2327 /* The match needs to be both kEDH and aRSA or aDSA, so don't worry */ 2328 if ((dh_tmp || dh_rsa || dh_dsa) && (rsa_enc || rsa_sign || dsa_sign)) 2329 mask_k |= SSL_kEDH; 2330 if ((dh_tmp_export || dh_rsa_export || dh_dsa_export) && 2331 (rsa_enc || rsa_sign || dsa_sign)) 2332 emask_k |= SSL_kEDH; 2333 #endif 2334 2335 if (dh_tmp_export) 2336 emask_k |= SSL_kEDH; 2337 2338 if (dh_tmp) 2339 mask_k |= SSL_kEDH; 2340 2341 if (dh_rsa) 2342 mask_k |= SSL_kDHr; 2343 if (dh_rsa_export) 2344 emask_k |= SSL_kDHr; 2345 2346 if (dh_dsa) 2347 mask_k |= SSL_kDHd; 2348 if (dh_dsa_export) 2349 emask_k |= SSL_kDHd; 2350 2351 if (mask_k & (SSL_kDHr | SSL_kDHd)) 2352 mask_a |= SSL_aDH; 2353 2354 if (rsa_enc || rsa_sign) { 2355 mask_a |= SSL_aRSA; 2356 emask_a |= SSL_aRSA; 2357 } 2358 2359 if (dsa_sign) { 2360 mask_a |= SSL_aDSS; 2361 emask_a |= SSL_aDSS; 2362 } 2363 2364 mask_a |= SSL_aNULL; 2365 emask_a |= SSL_aNULL; 2366 2367 #ifndef OPENSSL_NO_KRB5 2368 mask_k |= SSL_kKRB5; 2369 mask_a |= SSL_aKRB5; 2370 emask_k |= SSL_kKRB5; 2371 emask_a |= SSL_aKRB5; 2372 #endif 2373 2374 /* 2375 * An ECC certificate may be usable for ECDH and/or ECDSA cipher suites 2376 * depending on the key usage extension. 2377 */ 2378 #ifndef OPENSSL_NO_EC 2379 if (have_ecc_cert) { 2380 cpk = &c->pkeys[SSL_PKEY_ECC]; 2381 x = cpk->x509; 2382 /* This call populates extension flags (ex_flags) */ 2383 X509_check_purpose(x, -1, 0); 2384 # ifndef OPENSSL_NO_ECDH 2385 ecdh_ok = (x->ex_flags & EXFLAG_KUSAGE) ? 2386 (x->ex_kusage & X509v3_KU_KEY_AGREEMENT) : 1; 2387 # endif 2388 ecdsa_ok = (x->ex_flags & EXFLAG_KUSAGE) ? 2389 (x->ex_kusage & X509v3_KU_DIGITAL_SIGNATURE) : 1; 2390 if (!(cpk->valid_flags & CERT_PKEY_SIGN)) 2391 ecdsa_ok = 0; 2392 ecc_pkey = X509_get_pubkey(x); 2393 ecc_pkey_size = (ecc_pkey != NULL) ? EVP_PKEY_bits(ecc_pkey) : 0; 2394 EVP_PKEY_free(ecc_pkey); 2395 if ((x->sig_alg) && (x->sig_alg->algorithm)) { 2396 signature_nid = OBJ_obj2nid(x->sig_alg->algorithm); 2397 OBJ_find_sigid_algs(signature_nid, &md_nid, &pk_nid); 2398 } 2399 # ifndef OPENSSL_NO_ECDH 2400 if (ecdh_ok) { 2401 2402 if (pk_nid == NID_rsaEncryption || pk_nid == NID_rsa) { 2403 mask_k |= SSL_kECDHr; 2404 mask_a |= SSL_aECDH; 2405 if (ecc_pkey_size <= 163) { 2406 emask_k |= SSL_kECDHr; 2407 emask_a |= SSL_aECDH; 2408 } 2409 } 2410 2411 if (pk_nid == NID_X9_62_id_ecPublicKey) { 2412 mask_k |= SSL_kECDHe; 2413 mask_a |= SSL_aECDH; 2414 if (ecc_pkey_size <= 163) { 2415 emask_k |= SSL_kECDHe; 2416 emask_a |= SSL_aECDH; 2417 } 2418 } 2419 } 2420 # endif 2421 # ifndef OPENSSL_NO_ECDSA 2422 if (ecdsa_ok) { 2423 mask_a |= SSL_aECDSA; 2424 emask_a |= SSL_aECDSA; 2425 } 2426 # endif 2427 } 2428 #endif 2429 2430 #ifndef OPENSSL_NO_ECDH 2431 if (have_ecdh_tmp) { 2432 mask_k |= SSL_kEECDH; 2433 emask_k |= SSL_kEECDH; 2434 } 2435 #endif 2436 2437 #ifndef OPENSSL_NO_PSK 2438 mask_k |= SSL_kPSK; 2439 mask_a |= SSL_aPSK; 2440 emask_k |= SSL_kPSK; 2441 emask_a |= SSL_aPSK; 2442 #endif 2443 2444 c->mask_k = mask_k; 2445 c->mask_a = mask_a; 2446 c->export_mask_k = emask_k; 2447 c->export_mask_a = emask_a; 2448 c->valid = 1; 2449 } 2450 2451 /* This handy macro borrowed from crypto/x509v3/v3_purp.c */ 2452 #define ku_reject(x, usage) \ 2453 (((x)->ex_flags & EXFLAG_KUSAGE) && !((x)->ex_kusage & (usage))) 2454 2455 #ifndef OPENSSL_NO_EC 2456 2457 int ssl_check_srvr_ecc_cert_and_alg(X509 *x, SSL *s) 2458 { 2459 unsigned long alg_k, alg_a; 2460 EVP_PKEY *pkey = NULL; 2461 int keysize = 0; 2462 int signature_nid = 0, md_nid = 0, pk_nid = 0; 2463 const SSL_CIPHER *cs = s->s3->tmp.new_cipher; 2464 2465 alg_k = cs->algorithm_mkey; 2466 alg_a = cs->algorithm_auth; 2467 2468 if (SSL_C_IS_EXPORT(cs)) { 2469 /* ECDH key length in export ciphers must be <= 163 bits */ 2470 pkey = X509_get_pubkey(x); 2471 if (pkey == NULL) 2472 return 0; 2473 keysize = EVP_PKEY_bits(pkey); 2474 EVP_PKEY_free(pkey); 2475 if (keysize > 163) 2476 return 0; 2477 } 2478 2479 /* This call populates the ex_flags field correctly */ 2480 X509_check_purpose(x, -1, 0); 2481 if ((x->sig_alg) && (x->sig_alg->algorithm)) { 2482 signature_nid = OBJ_obj2nid(x->sig_alg->algorithm); 2483 OBJ_find_sigid_algs(signature_nid, &md_nid, &pk_nid); 2484 } 2485 if (alg_k & SSL_kECDHe || alg_k & SSL_kECDHr) { 2486 /* key usage, if present, must allow key agreement */ 2487 if (ku_reject(x, X509v3_KU_KEY_AGREEMENT)) { 2488 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, 2489 SSL_R_ECC_CERT_NOT_FOR_KEY_AGREEMENT); 2490 return 0; 2491 } 2492 if ((alg_k & SSL_kECDHe) && TLS1_get_version(s) < TLS1_2_VERSION) { 2493 /* signature alg must be ECDSA */ 2494 if (pk_nid != NID_X9_62_id_ecPublicKey) { 2495 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, 2496 SSL_R_ECC_CERT_SHOULD_HAVE_SHA1_SIGNATURE); 2497 return 0; 2498 } 2499 } 2500 if ((alg_k & SSL_kECDHr) && TLS1_get_version(s) < TLS1_2_VERSION) { 2501 /* signature alg must be RSA */ 2502 2503 if (pk_nid != NID_rsaEncryption && pk_nid != NID_rsa) { 2504 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, 2505 SSL_R_ECC_CERT_SHOULD_HAVE_RSA_SIGNATURE); 2506 return 0; 2507 } 2508 } 2509 } 2510 if (alg_a & SSL_aECDSA) { 2511 /* key usage, if present, must allow signing */ 2512 if (ku_reject(x, X509v3_KU_DIGITAL_SIGNATURE)) { 2513 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, 2514 SSL_R_ECC_CERT_NOT_FOR_SIGNING); 2515 return 0; 2516 } 2517 } 2518 2519 return 1; /* all checks are ok */ 2520 } 2521 2522 #endif 2523 2524 static int ssl_get_server_cert_index(const SSL *s) 2525 { 2526 int idx; 2527 idx = ssl_cipher_get_cert_index(s->s3->tmp.new_cipher); 2528 if (idx == SSL_PKEY_RSA_ENC && !s->cert->pkeys[SSL_PKEY_RSA_ENC].x509) 2529 idx = SSL_PKEY_RSA_SIGN; 2530 if (idx == -1) 2531 SSLerr(SSL_F_SSL_GET_SERVER_CERT_INDEX, ERR_R_INTERNAL_ERROR); 2532 return idx; 2533 } 2534 2535 CERT_PKEY *ssl_get_server_send_pkey(const SSL *s) 2536 { 2537 CERT *c; 2538 int i; 2539 2540 c = s->cert; 2541 if (!s->s3 || !s->s3->tmp.new_cipher) 2542 return NULL; 2543 ssl_set_cert_masks(c, s->s3->tmp.new_cipher); 2544 2545 #ifdef OPENSSL_SSL_DEBUG_BROKEN_PROTOCOL 2546 /* 2547 * Broken protocol test: return last used certificate: which may mismatch 2548 * the one expected. 2549 */ 2550 if (c->cert_flags & SSL_CERT_FLAG_BROKEN_PROTOCOL) 2551 return c->key; 2552 #endif 2553 2554 i = ssl_get_server_cert_index(s); 2555 2556 /* This may or may not be an error. */ 2557 if (i < 0) 2558 return NULL; 2559 2560 /* May be NULL. */ 2561 return &c->pkeys[i]; 2562 } 2563 2564 EVP_PKEY *ssl_get_sign_pkey(SSL *s, const SSL_CIPHER *cipher, 2565 const EVP_MD **pmd) 2566 { 2567 unsigned long alg_a; 2568 CERT *c; 2569 int idx = -1; 2570 2571 alg_a = cipher->algorithm_auth; 2572 c = s->cert; 2573 2574 #ifdef OPENSSL_SSL_DEBUG_BROKEN_PROTOCOL 2575 /* 2576 * Broken protocol test: use last key: which may mismatch the one 2577 * expected. 2578 */ 2579 if (c->cert_flags & SSL_CERT_FLAG_BROKEN_PROTOCOL) 2580 idx = c->key - c->pkeys; 2581 else 2582 #endif 2583 2584 if ((alg_a & SSL_aDSS) && 2585 (c->pkeys[SSL_PKEY_DSA_SIGN].privatekey != NULL)) 2586 idx = SSL_PKEY_DSA_SIGN; 2587 else if (alg_a & SSL_aRSA) { 2588 if (c->pkeys[SSL_PKEY_RSA_SIGN].privatekey != NULL) 2589 idx = SSL_PKEY_RSA_SIGN; 2590 else if (c->pkeys[SSL_PKEY_RSA_ENC].privatekey != NULL) 2591 idx = SSL_PKEY_RSA_ENC; 2592 } else if ((alg_a & SSL_aECDSA) && 2593 (c->pkeys[SSL_PKEY_ECC].privatekey != NULL)) 2594 idx = SSL_PKEY_ECC; 2595 if (idx == -1) { 2596 SSLerr(SSL_F_SSL_GET_SIGN_PKEY, ERR_R_INTERNAL_ERROR); 2597 return (NULL); 2598 } 2599 if (pmd) 2600 *pmd = c->pkeys[idx].digest; 2601 return c->pkeys[idx].privatekey; 2602 } 2603 2604 #ifndef OPENSSL_NO_TLSEXT 2605 int ssl_get_server_cert_serverinfo(SSL *s, const unsigned char **serverinfo, 2606 size_t *serverinfo_length) 2607 { 2608 CERT *c = NULL; 2609 int i = 0; 2610 *serverinfo_length = 0; 2611 2612 c = s->cert; 2613 i = ssl_get_server_cert_index(s); 2614 2615 if (i == -1) 2616 return 0; 2617 if (c->pkeys[i].serverinfo == NULL) 2618 return 0; 2619 2620 *serverinfo = c->pkeys[i].serverinfo; 2621 *serverinfo_length = c->pkeys[i].serverinfo_length; 2622 return 1; 2623 } 2624 #endif 2625 2626 void ssl_update_cache(SSL *s, int mode) 2627 { 2628 int i; 2629 2630 /* 2631 * If the session_id_length is 0, we are not supposed to cache it, and it 2632 * would be rather hard to do anyway :-) 2633 */ 2634 if (s->session->session_id_length == 0) 2635 return; 2636 2637 i = s->session_ctx->session_cache_mode; 2638 if ((i & mode) && (!s->hit) 2639 && ((i & SSL_SESS_CACHE_NO_INTERNAL_STORE) 2640 || SSL_CTX_add_session(s->session_ctx, s->session)) 2641 && (s->session_ctx->new_session_cb != NULL)) { 2642 CRYPTO_add(&s->session->references, 1, CRYPTO_LOCK_SSL_SESSION); 2643 if (!s->session_ctx->new_session_cb(s, s->session)) 2644 SSL_SESSION_free(s->session); 2645 } 2646 2647 /* auto flush every 255 connections */ 2648 if ((!(i & SSL_SESS_CACHE_NO_AUTO_CLEAR)) && ((i & mode) == mode)) { 2649 if ((((mode & SSL_SESS_CACHE_CLIENT) 2650 ? s->session_ctx->stats.sess_connect_good 2651 : s->session_ctx->stats.sess_accept_good) & 0xff) == 0xff) { 2652 SSL_CTX_flush_sessions(s->session_ctx, (unsigned long)time(NULL)); 2653 } 2654 } 2655 } 2656 2657 const SSL_METHOD *SSL_CTX_get_ssl_method(SSL_CTX *ctx) 2658 { 2659 return ctx->method; 2660 } 2661 2662 const SSL_METHOD *SSL_get_ssl_method(SSL *s) 2663 { 2664 return (s->method); 2665 } 2666 2667 int SSL_set_ssl_method(SSL *s, const SSL_METHOD *meth) 2668 { 2669 int conn = -1; 2670 int ret = 1; 2671 2672 if (s->method != meth) { 2673 if (s->handshake_func != NULL) 2674 conn = (s->handshake_func == s->method->ssl_connect); 2675 2676 if (s->method->version == meth->version) 2677 s->method = meth; 2678 else { 2679 s->method->ssl_free(s); 2680 s->method = meth; 2681 ret = s->method->ssl_new(s); 2682 } 2683 2684 if (conn == 1) 2685 s->handshake_func = meth->ssl_connect; 2686 else if (conn == 0) 2687 s->handshake_func = meth->ssl_accept; 2688 } 2689 return (ret); 2690 } 2691 2692 int SSL_get_error(const SSL *s, int i) 2693 { 2694 int reason; 2695 unsigned long l; 2696 BIO *bio; 2697 2698 if (i > 0) 2699 return (SSL_ERROR_NONE); 2700 2701 /* 2702 * Make things return SSL_ERROR_SYSCALL when doing SSL_do_handshake etc, 2703 * where we do encode the error 2704 */ 2705 if ((l = ERR_peek_error()) != 0) { 2706 if (ERR_GET_LIB(l) == ERR_LIB_SYS) 2707 return (SSL_ERROR_SYSCALL); 2708 else 2709 return (SSL_ERROR_SSL); 2710 } 2711 2712 if ((i < 0) && SSL_want_read(s)) { 2713 bio = SSL_get_rbio(s); 2714 if (BIO_should_read(bio)) 2715 return (SSL_ERROR_WANT_READ); 2716 else if (BIO_should_write(bio)) 2717 /* 2718 * This one doesn't make too much sense ... We never try to write 2719 * to the rbio, and an application program where rbio and wbio 2720 * are separate couldn't even know what it should wait for. 2721 * However if we ever set s->rwstate incorrectly (so that we have 2722 * SSL_want_read(s) instead of SSL_want_write(s)) and rbio and 2723 * wbio *are* the same, this test works around that bug; so it 2724 * might be safer to keep it. 2725 */ 2726 return (SSL_ERROR_WANT_WRITE); 2727 else if (BIO_should_io_special(bio)) { 2728 reason = BIO_get_retry_reason(bio); 2729 if (reason == BIO_RR_CONNECT) 2730 return (SSL_ERROR_WANT_CONNECT); 2731 else if (reason == BIO_RR_ACCEPT) 2732 return (SSL_ERROR_WANT_ACCEPT); 2733 else 2734 return (SSL_ERROR_SYSCALL); /* unknown */ 2735 } 2736 } 2737 2738 if ((i < 0) && SSL_want_write(s)) { 2739 bio = SSL_get_wbio(s); 2740 if (BIO_should_write(bio)) 2741 return (SSL_ERROR_WANT_WRITE); 2742 else if (BIO_should_read(bio)) 2743 /* 2744 * See above (SSL_want_read(s) with BIO_should_write(bio)) 2745 */ 2746 return (SSL_ERROR_WANT_READ); 2747 else if (BIO_should_io_special(bio)) { 2748 reason = BIO_get_retry_reason(bio); 2749 if (reason == BIO_RR_CONNECT) 2750 return (SSL_ERROR_WANT_CONNECT); 2751 else if (reason == BIO_RR_ACCEPT) 2752 return (SSL_ERROR_WANT_ACCEPT); 2753 else 2754 return (SSL_ERROR_SYSCALL); 2755 } 2756 } 2757 if ((i < 0) && SSL_want_x509_lookup(s)) { 2758 return (SSL_ERROR_WANT_X509_LOOKUP); 2759 } 2760 2761 if (i == 0) { 2762 if (s->version == SSL2_VERSION) { 2763 /* assume it is the socket being closed */ 2764 return (SSL_ERROR_ZERO_RETURN); 2765 } else { 2766 if ((s->shutdown & SSL_RECEIVED_SHUTDOWN) && 2767 (s->s3->warn_alert == SSL_AD_CLOSE_NOTIFY)) 2768 return (SSL_ERROR_ZERO_RETURN); 2769 } 2770 } 2771 return (SSL_ERROR_SYSCALL); 2772 } 2773 2774 int SSL_do_handshake(SSL *s) 2775 { 2776 int ret = 1; 2777 2778 if (s->handshake_func == NULL) { 2779 SSLerr(SSL_F_SSL_DO_HANDSHAKE, SSL_R_CONNECTION_TYPE_NOT_SET); 2780 return (-1); 2781 } 2782 2783 s->method->ssl_renegotiate_check(s); 2784 2785 if (SSL_in_init(s) || SSL_in_before(s)) { 2786 ret = s->handshake_func(s); 2787 } 2788 return (ret); 2789 } 2790 2791 /* 2792 * For the next 2 functions, SSL_clear() sets shutdown and so one of these 2793 * calls will reset it 2794 */ 2795 void SSL_set_accept_state(SSL *s) 2796 { 2797 s->server = 1; 2798 s->shutdown = 0; 2799 s->state = SSL_ST_ACCEPT | SSL_ST_BEFORE; 2800 s->handshake_func = s->method->ssl_accept; 2801 /* clear the current cipher */ 2802 ssl_clear_cipher_ctx(s); 2803 ssl_clear_hash_ctx(&s->read_hash); 2804 ssl_clear_hash_ctx(&s->write_hash); 2805 } 2806 2807 void SSL_set_connect_state(SSL *s) 2808 { 2809 s->server = 0; 2810 s->shutdown = 0; 2811 s->state = SSL_ST_CONNECT | SSL_ST_BEFORE; 2812 s->handshake_func = s->method->ssl_connect; 2813 /* clear the current cipher */ 2814 ssl_clear_cipher_ctx(s); 2815 ssl_clear_hash_ctx(&s->read_hash); 2816 ssl_clear_hash_ctx(&s->write_hash); 2817 } 2818 2819 int ssl_undefined_function(SSL *s) 2820 { 2821 SSLerr(SSL_F_SSL_UNDEFINED_FUNCTION, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); 2822 return (0); 2823 } 2824 2825 int ssl_undefined_void_function(void) 2826 { 2827 SSLerr(SSL_F_SSL_UNDEFINED_VOID_FUNCTION, 2828 ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); 2829 return (0); 2830 } 2831 2832 int ssl_undefined_const_function(const SSL *s) 2833 { 2834 SSLerr(SSL_F_SSL_UNDEFINED_CONST_FUNCTION, 2835 ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); 2836 return (0); 2837 } 2838 2839 SSL_METHOD *ssl_bad_method(int ver) 2840 { 2841 SSLerr(SSL_F_SSL_BAD_METHOD, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); 2842 return (NULL); 2843 } 2844 2845 const char *SSL_get_version(const SSL *s) 2846 { 2847 if (s->version == TLS1_2_VERSION) 2848 return ("TLSv1.2"); 2849 else if (s->version == TLS1_1_VERSION) 2850 return ("TLSv1.1"); 2851 else if (s->version == TLS1_VERSION) 2852 return ("TLSv1"); 2853 else if (s->version == SSL3_VERSION) 2854 return ("SSLv3"); 2855 else if (s->version == SSL2_VERSION) 2856 return ("SSLv2"); 2857 else if (s->version == DTLS1_BAD_VER) 2858 return ("DTLSv0.9"); 2859 else if (s->version == DTLS1_VERSION) 2860 return ("DTLSv1"); 2861 else if (s->version == DTLS1_2_VERSION) 2862 return ("DTLSv1.2"); 2863 else 2864 return ("unknown"); 2865 } 2866 2867 SSL *SSL_dup(SSL *s) 2868 { 2869 STACK_OF(X509_NAME) *sk; 2870 X509_NAME *xn; 2871 SSL *ret; 2872 int i; 2873 2874 if ((ret = SSL_new(SSL_get_SSL_CTX(s))) == NULL) 2875 return (NULL); 2876 2877 ret->version = s->version; 2878 ret->type = s->type; 2879 ret->method = s->method; 2880 2881 if (s->session != NULL) { 2882 /* This copies session-id, SSL_METHOD, sid_ctx, and 'cert' */ 2883 SSL_copy_session_id(ret, s); 2884 } else { 2885 /* 2886 * No session has been established yet, so we have to expect that 2887 * s->cert or ret->cert will be changed later -- they should not both 2888 * point to the same object, and thus we can't use 2889 * SSL_copy_session_id. 2890 */ 2891 2892 ret->method->ssl_free(ret); 2893 ret->method = s->method; 2894 ret->method->ssl_new(ret); 2895 2896 if (s->cert != NULL) { 2897 if (ret->cert != NULL) { 2898 ssl_cert_free(ret->cert); 2899 } 2900 ret->cert = ssl_cert_dup(s->cert); 2901 if (ret->cert == NULL) 2902 goto err; 2903 } 2904 2905 SSL_set_session_id_context(ret, s->sid_ctx, s->sid_ctx_length); 2906 } 2907 2908 ret->options = s->options; 2909 ret->mode = s->mode; 2910 SSL_set_max_cert_list(ret, SSL_get_max_cert_list(s)); 2911 SSL_set_read_ahead(ret, SSL_get_read_ahead(s)); 2912 ret->msg_callback = s->msg_callback; 2913 ret->msg_callback_arg = s->msg_callback_arg; 2914 SSL_set_verify(ret, SSL_get_verify_mode(s), SSL_get_verify_callback(s)); 2915 SSL_set_verify_depth(ret, SSL_get_verify_depth(s)); 2916 ret->generate_session_id = s->generate_session_id; 2917 2918 SSL_set_info_callback(ret, SSL_get_info_callback(s)); 2919 2920 ret->debug = s->debug; 2921 2922 /* copy app data, a little dangerous perhaps */ 2923 if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_SSL, &ret->ex_data, &s->ex_data)) 2924 goto err; 2925 2926 /* setup rbio, and wbio */ 2927 if (s->rbio != NULL) { 2928 if (!BIO_dup_state(s->rbio, (char *)&ret->rbio)) 2929 goto err; 2930 } 2931 if (s->wbio != NULL) { 2932 if (s->wbio != s->rbio) { 2933 if (!BIO_dup_state(s->wbio, (char *)&ret->wbio)) 2934 goto err; 2935 } else 2936 ret->wbio = ret->rbio; 2937 } 2938 ret->rwstate = s->rwstate; 2939 ret->in_handshake = s->in_handshake; 2940 ret->handshake_func = s->handshake_func; 2941 ret->server = s->server; 2942 ret->renegotiate = s->renegotiate; 2943 ret->new_session = s->new_session; 2944 ret->quiet_shutdown = s->quiet_shutdown; 2945 ret->shutdown = s->shutdown; 2946 ret->state = s->state; /* SSL_dup does not really work at any state, 2947 * though */ 2948 ret->rstate = s->rstate; 2949 ret->init_num = 0; /* would have to copy ret->init_buf, 2950 * ret->init_msg, ret->init_num, 2951 * ret->init_off */ 2952 ret->hit = s->hit; 2953 2954 X509_VERIFY_PARAM_inherit(ret->param, s->param); 2955 2956 /* dup the cipher_list and cipher_list_by_id stacks */ 2957 if (s->cipher_list != NULL) { 2958 if ((ret->cipher_list = sk_SSL_CIPHER_dup(s->cipher_list)) == NULL) 2959 goto err; 2960 } 2961 if (s->cipher_list_by_id != NULL) 2962 if ((ret->cipher_list_by_id = sk_SSL_CIPHER_dup(s->cipher_list_by_id)) 2963 == NULL) 2964 goto err; 2965 2966 /* Dup the client_CA list */ 2967 if (s->client_CA != NULL) { 2968 if ((sk = sk_X509_NAME_dup(s->client_CA)) == NULL) 2969 goto err; 2970 ret->client_CA = sk; 2971 for (i = 0; i < sk_X509_NAME_num(sk); i++) { 2972 xn = sk_X509_NAME_value(sk, i); 2973 if (sk_X509_NAME_set(sk, i, X509_NAME_dup(xn)) == NULL) { 2974 X509_NAME_free(xn); 2975 goto err; 2976 } 2977 } 2978 } 2979 2980 if (0) { 2981 err: 2982 if (ret != NULL) 2983 SSL_free(ret); 2984 ret = NULL; 2985 } 2986 return (ret); 2987 } 2988 2989 void ssl_clear_cipher_ctx(SSL *s) 2990 { 2991 if (s->enc_read_ctx != NULL) { 2992 EVP_CIPHER_CTX_cleanup(s->enc_read_ctx); 2993 OPENSSL_free(s->enc_read_ctx); 2994 s->enc_read_ctx = NULL; 2995 } 2996 if (s->enc_write_ctx != NULL) { 2997 EVP_CIPHER_CTX_cleanup(s->enc_write_ctx); 2998 OPENSSL_free(s->enc_write_ctx); 2999 s->enc_write_ctx = NULL; 3000 } 3001 #ifndef OPENSSL_NO_COMP 3002 if (s->expand != NULL) { 3003 COMP_CTX_free(s->expand); 3004 s->expand = NULL; 3005 } 3006 if (s->compress != NULL) { 3007 COMP_CTX_free(s->compress); 3008 s->compress = NULL; 3009 } 3010 #endif 3011 } 3012 3013 X509 *SSL_get_certificate(const SSL *s) 3014 { 3015 if (s->cert != NULL) 3016 return (s->cert->key->x509); 3017 else 3018 return (NULL); 3019 } 3020 3021 EVP_PKEY *SSL_get_privatekey(const SSL *s) 3022 { 3023 if (s->cert != NULL) 3024 return (s->cert->key->privatekey); 3025 else 3026 return (NULL); 3027 } 3028 3029 X509 *SSL_CTX_get0_certificate(const SSL_CTX *ctx) 3030 { 3031 if (ctx->cert != NULL) 3032 return ctx->cert->key->x509; 3033 else 3034 return NULL; 3035 } 3036 3037 EVP_PKEY *SSL_CTX_get0_privatekey(const SSL_CTX *ctx) 3038 { 3039 if (ctx->cert != NULL) 3040 return ctx->cert->key->privatekey; 3041 else 3042 return NULL; 3043 } 3044 3045 const SSL_CIPHER *SSL_get_current_cipher(const SSL *s) 3046 { 3047 if ((s->session != NULL) && (s->session->cipher != NULL)) 3048 return (s->session->cipher); 3049 return (NULL); 3050 } 3051 3052 #ifdef OPENSSL_NO_COMP 3053 const void *SSL_get_current_compression(SSL *s) 3054 { 3055 return NULL; 3056 } 3057 3058 const void *SSL_get_current_expansion(SSL *s) 3059 { 3060 return NULL; 3061 } 3062 #else 3063 3064 const COMP_METHOD *SSL_get_current_compression(SSL *s) 3065 { 3066 if (s->compress != NULL) 3067 return (s->compress->meth); 3068 return (NULL); 3069 } 3070 3071 const COMP_METHOD *SSL_get_current_expansion(SSL *s) 3072 { 3073 if (s->expand != NULL) 3074 return (s->expand->meth); 3075 return (NULL); 3076 } 3077 #endif 3078 3079 int ssl_init_wbio_buffer(SSL *s, int push) 3080 { 3081 BIO *bbio; 3082 3083 if (s->bbio == NULL) { 3084 bbio = BIO_new(BIO_f_buffer()); 3085 if (bbio == NULL) 3086 return (0); 3087 s->bbio = bbio; 3088 } else { 3089 bbio = s->bbio; 3090 if (s->bbio == s->wbio) 3091 s->wbio = BIO_pop(s->wbio); 3092 } 3093 (void)BIO_reset(bbio); 3094 /* if (!BIO_set_write_buffer_size(bbio,16*1024)) */ 3095 if (!BIO_set_read_buffer_size(bbio, 1)) { 3096 SSLerr(SSL_F_SSL_INIT_WBIO_BUFFER, ERR_R_BUF_LIB); 3097 return (0); 3098 } 3099 if (push) { 3100 if (s->wbio != bbio) 3101 s->wbio = BIO_push(bbio, s->wbio); 3102 } else { 3103 if (s->wbio == bbio) 3104 s->wbio = BIO_pop(bbio); 3105 } 3106 return (1); 3107 } 3108 3109 void ssl_free_wbio_buffer(SSL *s) 3110 { 3111 if (s->bbio == NULL) 3112 return; 3113 3114 if (s->bbio == s->wbio) { 3115 /* remove buffering */ 3116 s->wbio = BIO_pop(s->wbio); 3117 #ifdef REF_CHECK /* not the usual REF_CHECK, but this avoids 3118 * adding one more preprocessor symbol */ 3119 assert(s->wbio != NULL); 3120 #endif 3121 } 3122 BIO_free(s->bbio); 3123 s->bbio = NULL; 3124 } 3125 3126 void SSL_CTX_set_quiet_shutdown(SSL_CTX *ctx, int mode) 3127 { 3128 ctx->quiet_shutdown = mode; 3129 } 3130 3131 int SSL_CTX_get_quiet_shutdown(const SSL_CTX *ctx) 3132 { 3133 return (ctx->quiet_shutdown); 3134 } 3135 3136 void SSL_set_quiet_shutdown(SSL *s, int mode) 3137 { 3138 s->quiet_shutdown = mode; 3139 } 3140 3141 int SSL_get_quiet_shutdown(const SSL *s) 3142 { 3143 return (s->quiet_shutdown); 3144 } 3145 3146 void SSL_set_shutdown(SSL *s, int mode) 3147 { 3148 s->shutdown = mode; 3149 } 3150 3151 int SSL_get_shutdown(const SSL *s) 3152 { 3153 return (s->shutdown); 3154 } 3155 3156 int SSL_version(const SSL *s) 3157 { 3158 return (s->version); 3159 } 3160 3161 SSL_CTX *SSL_get_SSL_CTX(const SSL *ssl) 3162 { 3163 return (ssl->ctx); 3164 } 3165 3166 SSL_CTX *SSL_set_SSL_CTX(SSL *ssl, SSL_CTX *ctx) 3167 { 3168 CERT *ocert = ssl->cert; 3169 if (ssl->ctx == ctx) 3170 return ssl->ctx; 3171 #ifndef OPENSSL_NO_TLSEXT 3172 if (ctx == NULL) 3173 ctx = ssl->initial_ctx; 3174 #endif 3175 ssl->cert = ssl_cert_dup(ctx->cert); 3176 if (ocert) { 3177 /* Preserve any already negotiated parameters */ 3178 if (ssl->server) { 3179 ssl->cert->peer_sigalgs = ocert->peer_sigalgs; 3180 ssl->cert->peer_sigalgslen = ocert->peer_sigalgslen; 3181 ocert->peer_sigalgs = NULL; 3182 ssl->cert->ciphers_raw = ocert->ciphers_raw; 3183 ssl->cert->ciphers_rawlen = ocert->ciphers_rawlen; 3184 ocert->ciphers_raw = NULL; 3185 } 3186 #ifndef OPENSSL_NO_TLSEXT 3187 ssl->cert->alpn_proposed = ocert->alpn_proposed; 3188 ssl->cert->alpn_proposed_len = ocert->alpn_proposed_len; 3189 ocert->alpn_proposed = NULL; 3190 ssl->cert->alpn_sent = ocert->alpn_sent; 3191 #endif 3192 ssl_cert_free(ocert); 3193 } 3194 3195 /* 3196 * Program invariant: |sid_ctx| has fixed size (SSL_MAX_SID_CTX_LENGTH), 3197 * so setter APIs must prevent invalid lengths from entering the system. 3198 */ 3199 OPENSSL_assert(ssl->sid_ctx_length <= sizeof(ssl->sid_ctx)); 3200 3201 /* 3202 * If the session ID context matches that of the parent SSL_CTX, 3203 * inherit it from the new SSL_CTX as well. If however the context does 3204 * not match (i.e., it was set per-ssl with SSL_set_session_id_context), 3205 * leave it unchanged. 3206 */ 3207 if ((ssl->ctx != NULL) && 3208 (ssl->sid_ctx_length == ssl->ctx->sid_ctx_length) && 3209 (memcmp(ssl->sid_ctx, ssl->ctx->sid_ctx, ssl->sid_ctx_length) == 0)) { 3210 ssl->sid_ctx_length = ctx->sid_ctx_length; 3211 memcpy(&ssl->sid_ctx, &ctx->sid_ctx, sizeof(ssl->sid_ctx)); 3212 } 3213 3214 CRYPTO_add(&ctx->references, 1, CRYPTO_LOCK_SSL_CTX); 3215 if (ssl->ctx != NULL) 3216 SSL_CTX_free(ssl->ctx); /* decrement reference count */ 3217 ssl->ctx = ctx; 3218 3219 return (ssl->ctx); 3220 } 3221 3222 #ifndef OPENSSL_NO_STDIO 3223 int SSL_CTX_set_default_verify_paths(SSL_CTX *ctx) 3224 { 3225 return (X509_STORE_set_default_paths(ctx->cert_store)); 3226 } 3227 3228 int SSL_CTX_load_verify_locations(SSL_CTX *ctx, const char *CAfile, 3229 const char *CApath) 3230 { 3231 return (X509_STORE_load_locations(ctx->cert_store, CAfile, CApath)); 3232 } 3233 #endif 3234 3235 void SSL_set_info_callback(SSL *ssl, 3236 void (*cb) (const SSL *ssl, int type, int val)) 3237 { 3238 ssl->info_callback = cb; 3239 } 3240 3241 /* 3242 * One compiler (Diab DCC) doesn't like argument names in returned function 3243 * pointer. 3244 */ 3245 void (*SSL_get_info_callback(const SSL *ssl)) (const SSL * /* ssl */ , 3246 int /* type */ , 3247 int /* val */ ) { 3248 return ssl->info_callback; 3249 } 3250 3251 int SSL_state(const SSL *ssl) 3252 { 3253 return (ssl->state); 3254 } 3255 3256 void SSL_set_state(SSL *ssl, int state) 3257 { 3258 ssl->state = state; 3259 } 3260 3261 void SSL_set_verify_result(SSL *ssl, long arg) 3262 { 3263 ssl->verify_result = arg; 3264 } 3265 3266 long SSL_get_verify_result(const SSL *ssl) 3267 { 3268 return (ssl->verify_result); 3269 } 3270 3271 int SSL_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func, 3272 CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func) 3273 { 3274 return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL, argl, argp, 3275 new_func, dup_func, free_func); 3276 } 3277 3278 int SSL_set_ex_data(SSL *s, int idx, void *arg) 3279 { 3280 return (CRYPTO_set_ex_data(&s->ex_data, idx, arg)); 3281 } 3282 3283 void *SSL_get_ex_data(const SSL *s, int idx) 3284 { 3285 return (CRYPTO_get_ex_data(&s->ex_data, idx)); 3286 } 3287 3288 int SSL_CTX_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func, 3289 CRYPTO_EX_dup *dup_func, 3290 CRYPTO_EX_free *free_func) 3291 { 3292 return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL_CTX, argl, argp, 3293 new_func, dup_func, free_func); 3294 } 3295 3296 int SSL_CTX_set_ex_data(SSL_CTX *s, int idx, void *arg) 3297 { 3298 return (CRYPTO_set_ex_data(&s->ex_data, idx, arg)); 3299 } 3300 3301 void *SSL_CTX_get_ex_data(const SSL_CTX *s, int idx) 3302 { 3303 return (CRYPTO_get_ex_data(&s->ex_data, idx)); 3304 } 3305 3306 int ssl_ok(SSL *s) 3307 { 3308 return (1); 3309 } 3310 3311 X509_STORE *SSL_CTX_get_cert_store(const SSL_CTX *ctx) 3312 { 3313 return (ctx->cert_store); 3314 } 3315 3316 void SSL_CTX_set_cert_store(SSL_CTX *ctx, X509_STORE *store) 3317 { 3318 if (ctx->cert_store != NULL) 3319 X509_STORE_free(ctx->cert_store); 3320 ctx->cert_store = store; 3321 } 3322 3323 int SSL_want(const SSL *s) 3324 { 3325 return (s->rwstate); 3326 } 3327 3328 /** 3329 * \brief Set the callback for generating temporary RSA keys. 3330 * \param ctx the SSL context. 3331 * \param cb the callback 3332 */ 3333 3334 #ifndef OPENSSL_NO_RSA 3335 void SSL_CTX_set_tmp_rsa_callback(SSL_CTX *ctx, RSA *(*cb) (SSL *ssl, 3336 int is_export, 3337 int keylength)) 3338 { 3339 SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_TMP_RSA_CB, (void (*)(void))cb); 3340 } 3341 3342 void SSL_set_tmp_rsa_callback(SSL *ssl, RSA *(*cb) (SSL *ssl, 3343 int is_export, 3344 int keylength)) 3345 { 3346 SSL_callback_ctrl(ssl, SSL_CTRL_SET_TMP_RSA_CB, (void (*)(void))cb); 3347 } 3348 #endif 3349 3350 #ifdef DOXYGEN 3351 /** 3352 * \brief The RSA temporary key callback function. 3353 * \param ssl the SSL session. 3354 * \param is_export \c TRUE if the temp RSA key is for an export ciphersuite. 3355 * \param keylength if \c is_export is \c TRUE, then \c keylength is the size 3356 * of the required key in bits. 3357 * \return the temporary RSA key. 3358 * \sa SSL_CTX_set_tmp_rsa_callback, SSL_set_tmp_rsa_callback 3359 */ 3360 3361 RSA *cb(SSL *ssl, int is_export, int keylength) 3362 { 3363 } 3364 #endif 3365 3366 /** 3367 * \brief Set the callback for generating temporary DH keys. 3368 * \param ctx the SSL context. 3369 * \param dh the callback 3370 */ 3371 3372 #ifndef OPENSSL_NO_DH 3373 void SSL_CTX_set_tmp_dh_callback(SSL_CTX *ctx, 3374 DH *(*dh) (SSL *ssl, int is_export, 3375 int keylength)) 3376 { 3377 SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_TMP_DH_CB, (void (*)(void))dh); 3378 } 3379 3380 void SSL_set_tmp_dh_callback(SSL *ssl, DH *(*dh) (SSL *ssl, int is_export, 3381 int keylength)) 3382 { 3383 SSL_callback_ctrl(ssl, SSL_CTRL_SET_TMP_DH_CB, (void (*)(void))dh); 3384 } 3385 #endif 3386 3387 #ifndef OPENSSL_NO_ECDH 3388 void SSL_CTX_set_tmp_ecdh_callback(SSL_CTX *ctx, 3389 EC_KEY *(*ecdh) (SSL *ssl, int is_export, 3390 int keylength)) 3391 { 3392 SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_TMP_ECDH_CB, 3393 (void (*)(void))ecdh); 3394 } 3395 3396 void SSL_set_tmp_ecdh_callback(SSL *ssl, 3397 EC_KEY *(*ecdh) (SSL *ssl, int is_export, 3398 int keylength)) 3399 { 3400 SSL_callback_ctrl(ssl, SSL_CTRL_SET_TMP_ECDH_CB, (void (*)(void))ecdh); 3401 } 3402 #endif 3403 3404 #ifndef OPENSSL_NO_PSK 3405 int SSL_CTX_use_psk_identity_hint(SSL_CTX *ctx, const char *identity_hint) 3406 { 3407 if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN) { 3408 SSLerr(SSL_F_SSL_CTX_USE_PSK_IDENTITY_HINT, 3409 SSL_R_DATA_LENGTH_TOO_LONG); 3410 return 0; 3411 } 3412 if (ctx->psk_identity_hint != NULL) 3413 OPENSSL_free(ctx->psk_identity_hint); 3414 if (identity_hint != NULL) { 3415 ctx->psk_identity_hint = BUF_strdup(identity_hint); 3416 if (ctx->psk_identity_hint == NULL) 3417 return 0; 3418 } else 3419 ctx->psk_identity_hint = NULL; 3420 return 1; 3421 } 3422 3423 int SSL_use_psk_identity_hint(SSL *s, const char *identity_hint) 3424 { 3425 if (s == NULL) 3426 return 0; 3427 3428 if (s->session == NULL) 3429 return 1; /* session not created yet, ignored */ 3430 3431 if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN) { 3432 SSLerr(SSL_F_SSL_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG); 3433 return 0; 3434 } 3435 if (s->session->psk_identity_hint != NULL) 3436 OPENSSL_free(s->session->psk_identity_hint); 3437 if (identity_hint != NULL) { 3438 s->session->psk_identity_hint = BUF_strdup(identity_hint); 3439 if (s->session->psk_identity_hint == NULL) 3440 return 0; 3441 } else 3442 s->session->psk_identity_hint = NULL; 3443 return 1; 3444 } 3445 3446 const char *SSL_get_psk_identity_hint(const SSL *s) 3447 { 3448 if (s == NULL || s->session == NULL) 3449 return NULL; 3450 return (s->session->psk_identity_hint); 3451 } 3452 3453 const char *SSL_get_psk_identity(const SSL *s) 3454 { 3455 if (s == NULL || s->session == NULL) 3456 return NULL; 3457 return (s->session->psk_identity); 3458 } 3459 3460 void SSL_set_psk_client_callback(SSL *s, 3461 unsigned int (*cb) (SSL *ssl, 3462 const char *hint, 3463 char *identity, 3464 unsigned int 3465 max_identity_len, 3466 unsigned char *psk, 3467 unsigned int 3468 max_psk_len)) 3469 { 3470 s->psk_client_callback = cb; 3471 } 3472 3473 void SSL_CTX_set_psk_client_callback(SSL_CTX *ctx, 3474 unsigned int (*cb) (SSL *ssl, 3475 const char *hint, 3476 char *identity, 3477 unsigned int 3478 max_identity_len, 3479 unsigned char *psk, 3480 unsigned int 3481 max_psk_len)) 3482 { 3483 ctx->psk_client_callback = cb; 3484 } 3485 3486 void SSL_set_psk_server_callback(SSL *s, 3487 unsigned int (*cb) (SSL *ssl, 3488 const char *identity, 3489 unsigned char *psk, 3490 unsigned int 3491 max_psk_len)) 3492 { 3493 s->psk_server_callback = cb; 3494 } 3495 3496 void SSL_CTX_set_psk_server_callback(SSL_CTX *ctx, 3497 unsigned int (*cb) (SSL *ssl, 3498 const char *identity, 3499 unsigned char *psk, 3500 unsigned int 3501 max_psk_len)) 3502 { 3503 ctx->psk_server_callback = cb; 3504 } 3505 #endif 3506 3507 void SSL_CTX_set_msg_callback(SSL_CTX *ctx, 3508 void (*cb) (int write_p, int version, 3509 int content_type, const void *buf, 3510 size_t len, SSL *ssl, void *arg)) 3511 { 3512 SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb); 3513 } 3514 3515 void SSL_set_msg_callback(SSL *ssl, 3516 void (*cb) (int write_p, int version, 3517 int content_type, const void *buf, 3518 size_t len, SSL *ssl, void *arg)) 3519 { 3520 SSL_callback_ctrl(ssl, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb); 3521 } 3522 3523 /* 3524 * Allocates new EVP_MD_CTX and sets pointer to it into given pointer 3525 * vairable, freeing EVP_MD_CTX previously stored in that variable, if any. 3526 * If EVP_MD pointer is passed, initializes ctx with this md Returns newly 3527 * allocated ctx; 3528 */ 3529 3530 EVP_MD_CTX *ssl_replace_hash(EVP_MD_CTX **hash, const EVP_MD *md) 3531 { 3532 ssl_clear_hash_ctx(hash); 3533 *hash = EVP_MD_CTX_create(); 3534 if (*hash == NULL || (md && EVP_DigestInit_ex(*hash, md, NULL) <= 0)) { 3535 EVP_MD_CTX_destroy(*hash); 3536 *hash = NULL; 3537 return NULL; 3538 } 3539 return *hash; 3540 } 3541 3542 void ssl_clear_hash_ctx(EVP_MD_CTX **hash) 3543 { 3544 3545 if (*hash) 3546 EVP_MD_CTX_destroy(*hash); 3547 *hash = NULL; 3548 } 3549 3550 void SSL_set_debug(SSL *s, int debug) 3551 { 3552 s->debug = debug; 3553 } 3554 3555 int SSL_cache_hit(SSL *s) 3556 { 3557 return s->hit; 3558 } 3559 3560 int SSL_is_server(SSL *s) 3561 { 3562 return s->server; 3563 } 3564 3565 #if defined(_WINDLL) && defined(OPENSSL_SYS_WIN16) 3566 # include "../crypto/bio/bss_file.c" 3567 #endif 3568 3569 IMPLEMENT_STACK_OF(SSL_CIPHER) 3570 IMPLEMENT_STACK_OF(SSL_COMP) 3571 IMPLEMENT_OBJ_BSEARCH_GLOBAL_CMP_FN(SSL_CIPHER, SSL_CIPHER, ssl_cipher_id); 3572