1 /* $OpenBSD: ssl_lib.c,v 1.103 2015/04/15 16:25:43 jsing Exp $ */ 2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 3 * All rights reserved. 4 * 5 * This package is an SSL implementation written 6 * by Eric Young (eay@cryptsoft.com). 7 * The implementation was written so as to conform with Netscapes SSL. 8 * 9 * This library is free for commercial and non-commercial use as long as 10 * the following conditions are aheared to. The following conditions 11 * apply to all code found in this distribution, be it the RC4, RSA, 12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation 13 * included with this distribution is covered by the same copyright terms 14 * except that the holder is Tim Hudson (tjh@cryptsoft.com). 15 * 16 * Copyright remains Eric Young's, and as such any Copyright notices in 17 * the code are not to be removed. 18 * If this package is used in a product, Eric Young should be given attribution 19 * as the author of the parts of the library used. 20 * This can be in the form of a textual message at program startup or 21 * in documentation (online or textual) provided with the package. 22 * 23 * Redistribution and use in source and binary forms, with or without 24 * modification, are permitted provided that the following conditions 25 * are met: 26 * 1. Redistributions of source code must retain the copyright 27 * notice, this list of conditions and the following disclaimer. 28 * 2. Redistributions in binary form must reproduce the above copyright 29 * notice, this list of conditions and the following disclaimer in the 30 * documentation and/or other materials provided with the distribution. 31 * 3. All advertising materials mentioning features or use of this software 32 * must display the following acknowledgement: 33 * "This product includes cryptographic software written by 34 * Eric Young (eay@cryptsoft.com)" 35 * The word 'cryptographic' can be left out if the rouines from the library 36 * being used are not cryptographic related :-). 37 * 4. If you include any Windows specific code (or a derivative thereof) from 38 * the apps directory (application code) you must include an acknowledgement: 39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 40 * 41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 51 * SUCH DAMAGE. 52 * 53 * The licence and distribution terms for any publically available version or 54 * derivative of this code cannot be changed. i.e. this code cannot simply be 55 * copied and put under another distribution licence 56 * [including the GNU Public Licence.] 57 */ 58 /* ==================================================================== 59 * Copyright (c) 1998-2007 The OpenSSL Project. All rights reserved. 60 * 61 * Redistribution and use in source and binary forms, with or without 62 * modification, are permitted provided that the following conditions 63 * are met: 64 * 65 * 1. Redistributions of source code must retain the above copyright 66 * notice, this list of conditions and the following disclaimer. 67 * 68 * 2. Redistributions in binary form must reproduce the above copyright 69 * notice, this list of conditions and the following disclaimer in 70 * the documentation and/or other materials provided with the 71 * distribution. 72 * 73 * 3. All advertising materials mentioning features or use of this 74 * software must display the following acknowledgment: 75 * "This product includes software developed by the OpenSSL Project 76 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" 77 * 78 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 79 * endorse or promote products derived from this software without 80 * prior written permission. For written permission, please contact 81 * openssl-core@openssl.org. 82 * 83 * 5. Products derived from this software may not be called "OpenSSL" 84 * nor may "OpenSSL" appear in their names without prior written 85 * permission of the OpenSSL Project. 86 * 87 * 6. Redistributions of any form whatsoever must retain the following 88 * acknowledgment: 89 * "This product includes software developed by the OpenSSL Project 90 * for use in the OpenSSL Toolkit (http://www.openssl.org/)" 91 * 92 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 93 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 94 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 95 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 96 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 97 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 98 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 99 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 100 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 101 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 102 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 103 * OF THE POSSIBILITY OF SUCH DAMAGE. 104 * ==================================================================== 105 * 106 * This product includes cryptographic software written by Eric Young 107 * (eay@cryptsoft.com). This product includes software written by Tim 108 * Hudson (tjh@cryptsoft.com). 109 * 110 */ 111 /* ==================================================================== 112 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED. 113 * ECC cipher suite support in OpenSSL originally developed by 114 * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project. 115 */ 116 /* ==================================================================== 117 * Copyright 2005 Nokia. All rights reserved. 118 * 119 * The portions of the attached software ("Contribution") is developed by 120 * Nokia Corporation and is licensed pursuant to the OpenSSL open source 121 * license. 122 * 123 * The Contribution, originally written by Mika Kousa and Pasi Eronen of 124 * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites 125 * support (see RFC 4279) to OpenSSL. 126 * 127 * No patent licenses or other rights except those expressly stated in 128 * the OpenSSL open source license shall be deemed granted or received 129 * expressly, by implication, estoppel, or otherwise. 130 * 131 * No assurances are provided by Nokia that the Contribution does not 132 * infringe the patent or other intellectual property rights of any third 133 * party or that the license provides you with all the necessary rights 134 * to make use of the Contribution. 135 * 136 * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN 137 * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA 138 * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY 139 * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR 140 * OTHERWISE. 141 */ 142 143 #include <stdio.h> 144 145 #include "ssl_locl.h" 146 147 #include <openssl/bn.h> 148 #include <openssl/dh.h> 149 #include <openssl/lhash.h> 150 #include <openssl/objects.h> 151 #include <openssl/ocsp.h> 152 #include <openssl/x509v3.h> 153 154 #ifndef OPENSSL_NO_ENGINE 155 #include <openssl/engine.h> 156 #endif 157 158 const char *SSL_version_str = OPENSSL_VERSION_TEXT; 159 160 SSL3_ENC_METHOD ssl3_undef_enc_method = { 161 /* 162 * Evil casts, but these functions are only called if there's a 163 * library bug. 164 */ 165 .enc = (int (*)(SSL *, int))ssl_undefined_function, 166 .mac = (int (*)(SSL *, unsigned char *, int))ssl_undefined_function, 167 .setup_key_block = ssl_undefined_function, 168 .generate_master_secret = (int (*)(SSL *, unsigned char *, 169 unsigned char *, int))ssl_undefined_function, 170 .change_cipher_state = (int (*)(SSL*, int))ssl_undefined_function, 171 .final_finish_mac = (int (*)(SSL *, const char*, int, 172 unsigned char *))ssl_undefined_function, 173 .finish_mac_length = 0, 174 .cert_verify_mac = (int (*)(SSL *, int, 175 unsigned char *))ssl_undefined_function, 176 .client_finished_label = NULL, 177 .client_finished_label_len = 0, 178 .server_finished_label = NULL, 179 .server_finished_label_len = 0, 180 .alert_value = (int (*)(int))ssl_undefined_function, 181 .export_keying_material = (int (*)(SSL *, unsigned char *, size_t, 182 const char *, size_t, const unsigned char *, size_t, 183 int use_context))ssl_undefined_function, 184 .enc_flags = 0, 185 }; 186 187 int 188 SSL_clear(SSL *s) 189 { 190 if (s->method == NULL) { 191 SSLerr(SSL_F_SSL_CLEAR, SSL_R_NO_METHOD_SPECIFIED); 192 return (0); 193 } 194 195 if (ssl_clear_bad_session(s)) { 196 SSL_SESSION_free(s->session); 197 s->session = NULL; 198 } 199 200 s->error = 0; 201 s->hit = 0; 202 s->shutdown = 0; 203 204 if (s->renegotiate) { 205 SSLerr(SSL_F_SSL_CLEAR, ERR_R_INTERNAL_ERROR); 206 return (0); 207 } 208 209 s->type = 0; 210 211 s->state = SSL_ST_BEFORE|((s->server) ? SSL_ST_ACCEPT : SSL_ST_CONNECT); 212 213 s->version = s->method->version; 214 s->client_version = s->version; 215 s->rwstate = SSL_NOTHING; 216 s->rstate = SSL_ST_READ_HEADER; 217 218 BUF_MEM_free(s->init_buf); 219 s->init_buf = NULL; 220 221 ssl_clear_cipher_ctx(s); 222 ssl_clear_hash_ctx(&s->read_hash); 223 ssl_clear_hash_ctx(&s->write_hash); 224 225 s->first_packet = 0; 226 227 /* 228 * Check to see if we were changed into a different method, if 229 * so, revert back if we are not doing session-id reuse. 230 */ 231 if (!s->in_handshake && (s->session == NULL) && 232 (s->method != s->ctx->method)) { 233 s->method->ssl_free(s); 234 s->method = s->ctx->method; 235 if (!s->method->ssl_new(s)) 236 return (0); 237 } else 238 s->method->ssl_clear(s); 239 240 return (1); 241 } 242 243 /* Used to change an SSL_CTXs default SSL method type */ 244 int 245 SSL_CTX_set_ssl_version(SSL_CTX *ctx, const SSL_METHOD *meth) 246 { 247 STACK_OF(SSL_CIPHER) *sk; 248 249 ctx->method = meth; 250 251 sk = ssl_create_cipher_list(ctx->method, &(ctx->cipher_list), 252 &(ctx->cipher_list_by_id), SSL_DEFAULT_CIPHER_LIST); 253 if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= 0)) { 254 SSLerr(SSL_F_SSL_CTX_SET_SSL_VERSION, 255 SSL_R_SSL_LIBRARY_HAS_NO_CIPHERS); 256 return (0); 257 } 258 return (1); 259 } 260 261 SSL * 262 SSL_new(SSL_CTX *ctx) 263 { 264 SSL *s; 265 266 if (ctx == NULL) { 267 SSLerr(SSL_F_SSL_NEW, 268 SSL_R_NULL_SSL_CTX); 269 return (NULL); 270 } 271 if (ctx->method == NULL) { 272 SSLerr(SSL_F_SSL_NEW, 273 SSL_R_SSL_CTX_HAS_NO_DEFAULT_SSL_VERSION); 274 return (NULL); 275 } 276 277 s = calloc(1, sizeof(SSL)); 278 if (s == NULL) 279 goto err; 280 281 282 s->options = ctx->options; 283 s->mode = ctx->mode; 284 s->max_cert_list = ctx->max_cert_list; 285 286 if (ctx->cert != NULL) { 287 /* 288 * Earlier library versions used to copy the pointer to 289 * the CERT, not its contents; only when setting new 290 * parameters for the per-SSL copy, ssl_cert_new would be 291 * called (and the direct reference to the per-SSL_CTX 292 * settings would be lost, but those still were indirectly 293 * accessed for various purposes, and for that reason they 294 * used to be known as s->ctx->default_cert). 295 * Now we don't look at the SSL_CTX's CERT after having 296 * duplicated it once. 297 */ 298 s->cert = ssl_cert_dup(ctx->cert); 299 if (s->cert == NULL) 300 goto err; 301 } else 302 s->cert=NULL; /* Cannot really happen (see SSL_CTX_new) */ 303 304 s->read_ahead = ctx->read_ahead; 305 s->msg_callback = ctx->msg_callback; 306 s->msg_callback_arg = ctx->msg_callback_arg; 307 s->verify_mode = ctx->verify_mode; 308 s->sid_ctx_length = ctx->sid_ctx_length; 309 OPENSSL_assert(s->sid_ctx_length <= sizeof s->sid_ctx); 310 memcpy(&s->sid_ctx, &ctx->sid_ctx, sizeof(s->sid_ctx)); 311 s->verify_callback = ctx->default_verify_callback; 312 s->generate_session_id = ctx->generate_session_id; 313 314 s->param = X509_VERIFY_PARAM_new(); 315 if (!s->param) 316 goto err; 317 X509_VERIFY_PARAM_inherit(s->param, ctx->param); 318 s->quiet_shutdown = ctx->quiet_shutdown; 319 s->max_send_fragment = ctx->max_send_fragment; 320 321 CRYPTO_add(&ctx->references, 1, CRYPTO_LOCK_SSL_CTX); 322 s->ctx = ctx; 323 s->tlsext_debug_cb = 0; 324 s->tlsext_debug_arg = NULL; 325 s->tlsext_ticket_expected = 0; 326 s->tlsext_status_type = -1; 327 s->tlsext_status_expected = 0; 328 s->tlsext_ocsp_ids = NULL; 329 s->tlsext_ocsp_exts = NULL; 330 s->tlsext_ocsp_resp = NULL; 331 s->tlsext_ocsp_resplen = -1; 332 CRYPTO_add(&ctx->references, 1, CRYPTO_LOCK_SSL_CTX); 333 s->initial_ctx = ctx; 334 s->next_proto_negotiated = NULL; 335 336 if (s->ctx->alpn_client_proto_list != NULL) { 337 s->alpn_client_proto_list = 338 malloc(s->ctx->alpn_client_proto_list_len); 339 if (s->alpn_client_proto_list == NULL) 340 goto err; 341 memcpy(s->alpn_client_proto_list, 342 s->ctx->alpn_client_proto_list, 343 s->ctx->alpn_client_proto_list_len); 344 s->alpn_client_proto_list_len = 345 s->ctx->alpn_client_proto_list_len; 346 } 347 348 s->verify_result = X509_V_OK; 349 350 s->method = ctx->method; 351 352 if (!s->method->ssl_new(s)) 353 goto err; 354 355 s->references = 1; 356 s->server = (ctx->method->ssl_accept == ssl_undefined_function) ? 0 : 1; 357 358 SSL_clear(s); 359 360 CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data); 361 362 363 return (s); 364 err: 365 if (s != NULL) { 366 if (s->cert != NULL) 367 ssl_cert_free(s->cert); 368 SSL_CTX_free(s->ctx); /* decrement reference count */ 369 free(s); 370 } 371 SSLerr(SSL_F_SSL_NEW, 372 ERR_R_MALLOC_FAILURE); 373 return (NULL); 374 } 375 376 int 377 SSL_CTX_set_session_id_context(SSL_CTX *ctx, const unsigned char *sid_ctx, 378 unsigned int sid_ctx_len) 379 { 380 if (sid_ctx_len > sizeof ctx->sid_ctx) { 381 SSLerr(SSL_F_SSL_CTX_SET_SESSION_ID_CONTEXT, 382 SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG); 383 return (0); 384 } 385 ctx->sid_ctx_length = sid_ctx_len; 386 memcpy(ctx->sid_ctx, sid_ctx, sid_ctx_len); 387 388 return (1); 389 } 390 391 int 392 SSL_set_session_id_context(SSL *ssl, const unsigned char *sid_ctx, 393 unsigned int sid_ctx_len) 394 { 395 if (sid_ctx_len > SSL_MAX_SID_CTX_LENGTH) { 396 SSLerr(SSL_F_SSL_SET_SESSION_ID_CONTEXT, 397 SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG); 398 return (0); 399 } 400 ssl->sid_ctx_length = sid_ctx_len; 401 memcpy(ssl->sid_ctx, sid_ctx, sid_ctx_len); 402 403 return (1); 404 } 405 406 int 407 SSL_CTX_set_generate_session_id(SSL_CTX *ctx, GEN_SESSION_CB cb) 408 { 409 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX); 410 ctx->generate_session_id = cb; 411 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX); 412 return (1); 413 } 414 415 int 416 SSL_set_generate_session_id(SSL *ssl, GEN_SESSION_CB cb) 417 { 418 CRYPTO_w_lock(CRYPTO_LOCK_SSL); 419 ssl->generate_session_id = cb; 420 CRYPTO_w_unlock(CRYPTO_LOCK_SSL); 421 return (1); 422 } 423 424 int 425 SSL_has_matching_session_id(const SSL *ssl, const unsigned char *id, 426 unsigned int id_len) 427 { 428 /* 429 * A quick examination of SSL_SESSION_hash and SSL_SESSION_cmp 430 * shows how we can "construct" a session to give us the desired 431 * check - ie. to find if there's a session in the hash table 432 * that would conflict with any new session built out of this 433 * id/id_len and the ssl_version in use by this SSL. 434 */ 435 SSL_SESSION r, *p; 436 437 if (id_len > sizeof r.session_id) 438 return (0); 439 440 r.ssl_version = ssl->version; 441 r.session_id_length = id_len; 442 memcpy(r.session_id, id, id_len); 443 444 CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX); 445 p = lh_SSL_SESSION_retrieve(ssl->ctx->sessions, &r); 446 CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX); 447 return (p != NULL); 448 } 449 450 int 451 SSL_CTX_set_purpose(SSL_CTX *s, int purpose) 452 { 453 return (X509_VERIFY_PARAM_set_purpose(s->param, purpose)); 454 } 455 456 int 457 SSL_set_purpose(SSL *s, int purpose) 458 { 459 return (X509_VERIFY_PARAM_set_purpose(s->param, purpose)); 460 } 461 462 int 463 SSL_CTX_set_trust(SSL_CTX *s, int trust) 464 { 465 return (X509_VERIFY_PARAM_set_trust(s->param, trust)); 466 } 467 468 int 469 SSL_set_trust(SSL *s, int trust) 470 { 471 return (X509_VERIFY_PARAM_set_trust(s->param, trust)); 472 } 473 474 int 475 SSL_CTX_set1_param(SSL_CTX *ctx, X509_VERIFY_PARAM *vpm) 476 { 477 return (X509_VERIFY_PARAM_set1(ctx->param, vpm)); 478 } 479 480 int 481 SSL_set1_param(SSL *ssl, X509_VERIFY_PARAM *vpm) 482 { 483 return (X509_VERIFY_PARAM_set1(ssl->param, vpm)); 484 } 485 486 void 487 SSL_free(SSL *s) 488 { 489 int i; 490 491 if (s == NULL) 492 return; 493 494 i = CRYPTO_add(&s->references, -1, CRYPTO_LOCK_SSL); 495 if (i > 0) 496 return; 497 498 if (s->param) 499 X509_VERIFY_PARAM_free(s->param); 500 501 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data); 502 503 if (s->bbio != NULL) { 504 /* If the buffering BIO is in place, pop it off */ 505 if (s->bbio == s->wbio) { 506 s->wbio = BIO_pop(s->wbio); 507 } 508 BIO_free(s->bbio); 509 s->bbio = NULL; 510 } 511 if (s->rbio != NULL) 512 BIO_free_all(s->rbio); 513 if ((s->wbio != NULL) && (s->wbio != s->rbio)) 514 BIO_free_all(s->wbio); 515 516 if (s->init_buf != NULL) 517 BUF_MEM_free(s->init_buf); 518 519 /* add extra stuff */ 520 if (s->cipher_list != NULL) 521 sk_SSL_CIPHER_free(s->cipher_list); 522 if (s->cipher_list_by_id != NULL) 523 sk_SSL_CIPHER_free(s->cipher_list_by_id); 524 525 /* Make the next call work :-) */ 526 if (s->session != NULL) { 527 ssl_clear_bad_session(s); 528 SSL_SESSION_free(s->session); 529 } 530 531 ssl_clear_cipher_ctx(s); 532 ssl_clear_hash_ctx(&s->read_hash); 533 ssl_clear_hash_ctx(&s->write_hash); 534 535 if (s->cert != NULL) 536 ssl_cert_free(s->cert); 537 /* Free up if allocated */ 538 539 free(s->tlsext_hostname); 540 SSL_CTX_free(s->initial_ctx); 541 free(s->tlsext_ecpointformatlist); 542 free(s->tlsext_ellipticcurvelist); 543 if (s->tlsext_ocsp_exts) 544 sk_X509_EXTENSION_pop_free(s->tlsext_ocsp_exts, 545 X509_EXTENSION_free); 546 if (s->tlsext_ocsp_ids) 547 sk_OCSP_RESPID_pop_free(s->tlsext_ocsp_ids, OCSP_RESPID_free); 548 free(s->tlsext_ocsp_resp); 549 550 if (s->client_CA != NULL) 551 sk_X509_NAME_pop_free(s->client_CA, X509_NAME_free); 552 553 if (s->method != NULL) 554 s->method->ssl_free(s); 555 556 SSL_CTX_free(s->ctx); 557 558 559 free(s->next_proto_negotiated); 560 free(s->alpn_client_proto_list); 561 562 #ifndef OPENSSL_NO_SRTP 563 if (s->srtp_profiles) 564 sk_SRTP_PROTECTION_PROFILE_free(s->srtp_profiles); 565 #endif 566 567 free(s); 568 } 569 570 void 571 SSL_set_bio(SSL *s, BIO *rbio, BIO *wbio) 572 { 573 /* If the output buffering BIO is still in place, remove it */ 574 if (s->bbio != NULL) { 575 if (s->wbio == s->bbio) { 576 s->wbio = s->wbio->next_bio; 577 s->bbio->next_bio = NULL; 578 } 579 } 580 if ((s->rbio != NULL) && (s->rbio != rbio)) 581 BIO_free_all(s->rbio); 582 if ((s->wbio != NULL) && (s->wbio != wbio) && (s->rbio != s->wbio)) 583 BIO_free_all(s->wbio); 584 s->rbio = rbio; 585 s->wbio = wbio; 586 } 587 588 BIO * 589 SSL_get_rbio(const SSL *s) 590 { 591 return (s->rbio); 592 } 593 594 BIO * 595 SSL_get_wbio(const SSL *s) 596 { 597 return (s->wbio); 598 } 599 600 int 601 SSL_get_fd(const SSL *s) 602 { 603 return (SSL_get_rfd(s)); 604 } 605 606 int 607 SSL_get_rfd(const SSL *s) 608 { 609 int ret = -1; 610 BIO *b, *r; 611 612 b = SSL_get_rbio(s); 613 r = BIO_find_type(b, BIO_TYPE_DESCRIPTOR); 614 if (r != NULL) 615 BIO_get_fd(r, &ret); 616 return (ret); 617 } 618 619 int 620 SSL_get_wfd(const SSL *s) 621 { 622 int ret = -1; 623 BIO *b, *r; 624 625 b = SSL_get_wbio(s); 626 r = BIO_find_type(b, BIO_TYPE_DESCRIPTOR); 627 if (r != NULL) 628 BIO_get_fd(r, &ret); 629 return (ret); 630 } 631 632 int 633 SSL_set_fd(SSL *s, int fd) 634 { 635 int ret = 0; 636 BIO *bio = NULL; 637 638 bio = BIO_new(BIO_s_socket()); 639 640 if (bio == NULL) { 641 SSLerr(SSL_F_SSL_SET_FD, 642 ERR_R_BUF_LIB); 643 goto err; 644 } 645 BIO_set_fd(bio, fd, BIO_NOCLOSE); 646 SSL_set_bio(s, bio, bio); 647 ret = 1; 648 err: 649 return (ret); 650 } 651 652 int 653 SSL_set_wfd(SSL *s, int fd) 654 { 655 int ret = 0; 656 BIO *bio = NULL; 657 658 if ((s->rbio == NULL) || (BIO_method_type(s->rbio) != BIO_TYPE_SOCKET) 659 || ((int)BIO_get_fd(s->rbio, NULL) != fd)) { 660 bio = BIO_new(BIO_s_socket()); 661 662 if (bio == NULL) { 663 SSLerr(SSL_F_SSL_SET_WFD, 664 ERR_R_BUF_LIB); 665 goto err; 666 } 667 BIO_set_fd(bio, fd, BIO_NOCLOSE); 668 SSL_set_bio(s, SSL_get_rbio(s), bio); 669 } else 670 SSL_set_bio(s, SSL_get_rbio(s), SSL_get_rbio(s)); 671 ret = 1; 672 err: 673 return (ret); 674 } 675 676 int 677 SSL_set_rfd(SSL *s, int fd) 678 { 679 int ret = 0; 680 BIO *bio = NULL; 681 682 if ((s->wbio == NULL) || (BIO_method_type(s->wbio) != BIO_TYPE_SOCKET) 683 || ((int)BIO_get_fd(s->wbio, NULL) != fd)) { 684 bio = BIO_new(BIO_s_socket()); 685 686 if (bio == NULL) { 687 SSLerr(SSL_F_SSL_SET_RFD, 688 ERR_R_BUF_LIB); 689 goto err; 690 } 691 BIO_set_fd(bio, fd, BIO_NOCLOSE); 692 SSL_set_bio(s, bio, SSL_get_wbio(s)); 693 } else 694 SSL_set_bio(s, SSL_get_wbio(s), SSL_get_wbio(s)); 695 ret = 1; 696 err: 697 return (ret); 698 } 699 700 701 /* return length of latest Finished message we sent, copy to 'buf' */ 702 size_t 703 SSL_get_finished(const SSL *s, void *buf, size_t count) 704 { 705 size_t ret = 0; 706 707 if (s->s3 != NULL) { 708 ret = s->s3->tmp.finish_md_len; 709 if (count > ret) 710 count = ret; 711 memcpy(buf, s->s3->tmp.finish_md, count); 712 } 713 return (ret); 714 } 715 716 /* return length of latest Finished message we expected, copy to 'buf' */ 717 size_t 718 SSL_get_peer_finished(const SSL *s, void *buf, size_t count) 719 { 720 size_t ret = 0; 721 722 if (s->s3 != NULL) { 723 ret = s->s3->tmp.peer_finish_md_len; 724 if (count > ret) 725 count = ret; 726 memcpy(buf, s->s3->tmp.peer_finish_md, count); 727 } 728 return (ret); 729 } 730 731 732 int 733 SSL_get_verify_mode(const SSL *s) 734 { 735 return (s->verify_mode); 736 } 737 738 int 739 SSL_get_verify_depth(const SSL *s) 740 { 741 return (X509_VERIFY_PARAM_get_depth(s->param)); 742 } 743 744 int 745 (*SSL_get_verify_callback(const SSL *s))(int, X509_STORE_CTX *) 746 { 747 return (s->verify_callback); 748 } 749 750 int 751 SSL_CTX_get_verify_mode(const SSL_CTX *ctx) 752 { 753 return (ctx->verify_mode); 754 } 755 756 int 757 SSL_CTX_get_verify_depth(const SSL_CTX *ctx) 758 { 759 return (X509_VERIFY_PARAM_get_depth(ctx->param)); 760 } 761 762 int (*SSL_CTX_get_verify_callback(const SSL_CTX *ctx))(int, X509_STORE_CTX *) 763 { 764 return (ctx->default_verify_callback); 765 } 766 767 void 768 SSL_set_verify(SSL *s, int mode, 769 int (*callback)(int ok, X509_STORE_CTX *ctx)) 770 { 771 s->verify_mode = mode; 772 if (callback != NULL) 773 s->verify_callback = callback; 774 } 775 776 void 777 SSL_set_verify_depth(SSL *s, int depth) 778 { 779 X509_VERIFY_PARAM_set_depth(s->param, depth); 780 } 781 782 void 783 SSL_set_read_ahead(SSL *s, int yes) 784 { 785 s->read_ahead = yes; 786 } 787 788 int 789 SSL_get_read_ahead(const SSL *s) 790 { 791 return (s->read_ahead); 792 } 793 794 int 795 SSL_pending(const SSL *s) 796 { 797 /* 798 * SSL_pending cannot work properly if read-ahead is enabled 799 * (SSL_[CTX_]ctrl(..., SSL_CTRL_SET_READ_AHEAD, 1, NULL)), 800 * and it is impossible to fix since SSL_pending cannot report 801 * errors that may be observed while scanning the new data. 802 * (Note that SSL_pending() is often used as a boolean value, 803 * so we'd better not return -1.) 804 */ 805 return (s->method->ssl_pending(s)); 806 } 807 808 X509 * 809 SSL_get_peer_certificate(const SSL *s) 810 { 811 X509 *r; 812 813 if ((s == NULL) || (s->session == NULL)) 814 r = NULL; 815 else 816 r = s->session->peer; 817 818 if (r == NULL) 819 return (r); 820 821 CRYPTO_add(&r->references, 1, CRYPTO_LOCK_X509); 822 823 return (r); 824 } 825 826 STACK_OF(X509) * 827 SSL_get_peer_cert_chain(const SSL *s) 828 { 829 STACK_OF(X509) *r; 830 831 if ((s == NULL) || (s->session == NULL) || 832 (s->session->sess_cert == NULL)) 833 r = NULL; 834 else 835 r = s->session->sess_cert->cert_chain; 836 837 /* 838 * If we are a client, cert_chain includes the peer's own 839 * certificate; 840 * if we are a server, it does not. 841 */ 842 return (r); 843 } 844 845 /* 846 * Now in theory, since the calling process own 't' it should be safe to 847 * modify. We need to be able to read f without being hassled 848 */ 849 void 850 SSL_copy_session_id(SSL *t, const SSL *f) 851 { 852 CERT *tmp; 853 854 /* Do we need to to SSL locking? */ 855 SSL_set_session(t, SSL_get_session(f)); 856 857 /* 858 * What if we are setup as SSLv2 but want to talk SSLv3 or 859 * vice-versa. 860 */ 861 if (t->method != f->method) { 862 t->method->ssl_free(t); /* cleanup current */ 863 t->method=f->method; /* change method */ 864 t->method->ssl_new(t); /* setup new */ 865 } 866 867 tmp = t->cert; 868 if (f->cert != NULL) { 869 CRYPTO_add(&f->cert->references, 1, CRYPTO_LOCK_SSL_CERT); 870 t->cert = f->cert; 871 } else 872 t->cert = NULL; 873 if (tmp != NULL) 874 ssl_cert_free(tmp); 875 SSL_set_session_id_context(t, f->sid_ctx, f->sid_ctx_length); 876 } 877 878 /* Fix this so it checks all the valid key/cert options */ 879 int 880 SSL_CTX_check_private_key(const SSL_CTX *ctx) 881 { 882 if ((ctx == NULL) || (ctx->cert == NULL) || 883 (ctx->cert->key->x509 == NULL)) { 884 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY, 885 SSL_R_NO_CERTIFICATE_ASSIGNED); 886 return (0); 887 } 888 if (ctx->cert->key->privatekey == NULL) { 889 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY, 890 SSL_R_NO_PRIVATE_KEY_ASSIGNED); 891 return (0); 892 } 893 return (X509_check_private_key(ctx->cert->key->x509, 894 ctx->cert->key->privatekey)); 895 } 896 897 /* Fix this function so that it takes an optional type parameter */ 898 int 899 SSL_check_private_key(const SSL *ssl) 900 { 901 if (ssl == NULL) { 902 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY, 903 ERR_R_PASSED_NULL_PARAMETER); 904 return (0); 905 } 906 if (ssl->cert == NULL) { 907 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY, 908 SSL_R_NO_CERTIFICATE_ASSIGNED); 909 return (0); 910 } 911 if (ssl->cert->key->x509 == NULL) { 912 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY, 913 SSL_R_NO_CERTIFICATE_ASSIGNED); 914 return (0); 915 } 916 if (ssl->cert->key->privatekey == NULL) { 917 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY, 918 SSL_R_NO_PRIVATE_KEY_ASSIGNED); 919 return (0); 920 } 921 return (X509_check_private_key(ssl->cert->key->x509, 922 ssl->cert->key->privatekey)); 923 } 924 925 int 926 SSL_accept(SSL *s) 927 { 928 if (s->handshake_func == 0) 929 SSL_set_accept_state(s); /* Not properly initialized yet */ 930 931 return (s->method->ssl_accept(s)); 932 } 933 934 int 935 SSL_connect(SSL *s) 936 { 937 if (s->handshake_func == 0) 938 SSL_set_connect_state(s); /* Not properly initialized yet */ 939 940 return (s->method->ssl_connect(s)); 941 } 942 943 long 944 SSL_get_default_timeout(const SSL *s) 945 { 946 return (s->method->get_timeout()); 947 } 948 949 int 950 SSL_read(SSL *s, void *buf, int num) 951 { 952 if (s->handshake_func == 0) { 953 SSLerr(SSL_F_SSL_READ, 954 SSL_R_UNINITIALIZED); 955 return (-1); 956 } 957 958 if (s->shutdown & SSL_RECEIVED_SHUTDOWN) { 959 s->rwstate = SSL_NOTHING; 960 return (0); 961 } 962 return (s->method->ssl_read(s, buf, num)); 963 } 964 965 int 966 SSL_peek(SSL *s, void *buf, int num) 967 { 968 if (s->handshake_func == 0) { 969 SSLerr(SSL_F_SSL_PEEK, 970 SSL_R_UNINITIALIZED); 971 return (-1); 972 } 973 974 if (s->shutdown & SSL_RECEIVED_SHUTDOWN) { 975 return (0); 976 } 977 return (s->method->ssl_peek(s, buf, num)); 978 } 979 980 int 981 SSL_write(SSL *s, const void *buf, int num) 982 { 983 if (s->handshake_func == 0) { 984 SSLerr(SSL_F_SSL_WRITE, 985 SSL_R_UNINITIALIZED); 986 return (-1); 987 } 988 989 if (s->shutdown & SSL_SENT_SHUTDOWN) { 990 s->rwstate = SSL_NOTHING; 991 SSLerr(SSL_F_SSL_WRITE, 992 SSL_R_PROTOCOL_IS_SHUTDOWN); 993 return (-1); 994 } 995 return (s->method->ssl_write(s, buf, num)); 996 } 997 998 int 999 SSL_shutdown(SSL *s) 1000 { 1001 /* 1002 * Note that this function behaves differently from what one might 1003 * expect. Return values are 0 for no success (yet), 1004 * 1 for success; but calling it once is usually not enough, 1005 * even if blocking I/O is used (see ssl3_shutdown). 1006 */ 1007 1008 if (s->handshake_func == 0) { 1009 SSLerr(SSL_F_SSL_SHUTDOWN, 1010 SSL_R_UNINITIALIZED); 1011 return (-1); 1012 } 1013 1014 if ((s != NULL) && !SSL_in_init(s)) 1015 return (s->method->ssl_shutdown(s)); 1016 else 1017 return (1); 1018 } 1019 1020 int 1021 SSL_renegotiate(SSL *s) 1022 { 1023 if (s->renegotiate == 0) 1024 s->renegotiate = 1; 1025 1026 s->new_session = 1; 1027 1028 return (s->method->ssl_renegotiate(s)); 1029 } 1030 1031 int 1032 SSL_renegotiate_abbreviated(SSL *s) 1033 { 1034 if (s->renegotiate == 0) 1035 s->renegotiate = 1; 1036 1037 s->new_session = 0; 1038 1039 return (s->method->ssl_renegotiate(s)); 1040 } 1041 1042 int 1043 SSL_renegotiate_pending(SSL *s) 1044 { 1045 /* 1046 * Becomes true when negotiation is requested; 1047 * false again once a handshake has finished. 1048 */ 1049 return (s->renegotiate != 0); 1050 } 1051 1052 long 1053 SSL_ctrl(SSL *s, int cmd, long larg, void *parg) 1054 { 1055 long l; 1056 1057 switch (cmd) { 1058 case SSL_CTRL_GET_READ_AHEAD: 1059 return (s->read_ahead); 1060 case SSL_CTRL_SET_READ_AHEAD: 1061 l = s->read_ahead; 1062 s->read_ahead = larg; 1063 return (l); 1064 1065 case SSL_CTRL_SET_MSG_CALLBACK_ARG: 1066 s->msg_callback_arg = parg; 1067 return (1); 1068 1069 case SSL_CTRL_OPTIONS: 1070 return (s->options|=larg); 1071 case SSL_CTRL_CLEAR_OPTIONS: 1072 return (s->options&=~larg); 1073 case SSL_CTRL_MODE: 1074 return (s->mode|=larg); 1075 case SSL_CTRL_CLEAR_MODE: 1076 return (s->mode &=~larg); 1077 case SSL_CTRL_GET_MAX_CERT_LIST: 1078 return (s->max_cert_list); 1079 case SSL_CTRL_SET_MAX_CERT_LIST: 1080 l = s->max_cert_list; 1081 s->max_cert_list = larg; 1082 return (l); 1083 case SSL_CTRL_SET_MTU: 1084 #ifndef OPENSSL_NO_DTLS1 1085 if (larg < (long)dtls1_min_mtu()) 1086 return (0); 1087 #endif 1088 if (SSL_IS_DTLS(s)) { 1089 s->d1->mtu = larg; 1090 return (larg); 1091 } 1092 return (0); 1093 case SSL_CTRL_SET_MAX_SEND_FRAGMENT: 1094 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH) 1095 return (0); 1096 s->max_send_fragment = larg; 1097 return (1); 1098 case SSL_CTRL_GET_RI_SUPPORT: 1099 if (s->s3) 1100 return (s->s3->send_connection_binding); 1101 else return (0); 1102 default: 1103 return (s->method->ssl_ctrl(s, cmd, larg, parg)); 1104 } 1105 } 1106 1107 long 1108 SSL_callback_ctrl(SSL *s, int cmd, void (*fp)(void)) 1109 { 1110 switch (cmd) { 1111 case SSL_CTRL_SET_MSG_CALLBACK: 1112 s->msg_callback = (void (*)(int write_p, int version, 1113 int content_type, const void *buf, size_t len, 1114 SSL *ssl, void *arg))(fp); 1115 return (1); 1116 1117 default: 1118 return (s->method->ssl_callback_ctrl(s, cmd, fp)); 1119 } 1120 } 1121 1122 LHASH_OF(SSL_SESSION) * 1123 SSL_CTX_sessions(SSL_CTX *ctx) 1124 { 1125 return (ctx->sessions); 1126 } 1127 1128 long 1129 SSL_CTX_ctrl(SSL_CTX *ctx, int cmd, long larg, void *parg) 1130 { 1131 long l; 1132 1133 switch (cmd) { 1134 case SSL_CTRL_GET_READ_AHEAD: 1135 return (ctx->read_ahead); 1136 case SSL_CTRL_SET_READ_AHEAD: 1137 l = ctx->read_ahead; 1138 ctx->read_ahead = larg; 1139 return (l); 1140 1141 case SSL_CTRL_SET_MSG_CALLBACK_ARG: 1142 ctx->msg_callback_arg = parg; 1143 return (1); 1144 1145 case SSL_CTRL_GET_MAX_CERT_LIST: 1146 return (ctx->max_cert_list); 1147 case SSL_CTRL_SET_MAX_CERT_LIST: 1148 l = ctx->max_cert_list; 1149 ctx->max_cert_list = larg; 1150 return (l); 1151 1152 case SSL_CTRL_SET_SESS_CACHE_SIZE: 1153 l = ctx->session_cache_size; 1154 ctx->session_cache_size = larg; 1155 return (l); 1156 case SSL_CTRL_GET_SESS_CACHE_SIZE: 1157 return (ctx->session_cache_size); 1158 case SSL_CTRL_SET_SESS_CACHE_MODE: 1159 l = ctx->session_cache_mode; 1160 ctx->session_cache_mode = larg; 1161 return (l); 1162 case SSL_CTRL_GET_SESS_CACHE_MODE: 1163 return (ctx->session_cache_mode); 1164 1165 case SSL_CTRL_SESS_NUMBER: 1166 return (lh_SSL_SESSION_num_items(ctx->sessions)); 1167 case SSL_CTRL_SESS_CONNECT: 1168 return (ctx->stats.sess_connect); 1169 case SSL_CTRL_SESS_CONNECT_GOOD: 1170 return (ctx->stats.sess_connect_good); 1171 case SSL_CTRL_SESS_CONNECT_RENEGOTIATE: 1172 return (ctx->stats.sess_connect_renegotiate); 1173 case SSL_CTRL_SESS_ACCEPT: 1174 return (ctx->stats.sess_accept); 1175 case SSL_CTRL_SESS_ACCEPT_GOOD: 1176 return (ctx->stats.sess_accept_good); 1177 case SSL_CTRL_SESS_ACCEPT_RENEGOTIATE: 1178 return (ctx->stats.sess_accept_renegotiate); 1179 case SSL_CTRL_SESS_HIT: 1180 return (ctx->stats.sess_hit); 1181 case SSL_CTRL_SESS_CB_HIT: 1182 return (ctx->stats.sess_cb_hit); 1183 case SSL_CTRL_SESS_MISSES: 1184 return (ctx->stats.sess_miss); 1185 case SSL_CTRL_SESS_TIMEOUTS: 1186 return (ctx->stats.sess_timeout); 1187 case SSL_CTRL_SESS_CACHE_FULL: 1188 return (ctx->stats.sess_cache_full); 1189 case SSL_CTRL_OPTIONS: 1190 return (ctx->options|=larg); 1191 case SSL_CTRL_CLEAR_OPTIONS: 1192 return (ctx->options&=~larg); 1193 case SSL_CTRL_MODE: 1194 return (ctx->mode|=larg); 1195 case SSL_CTRL_CLEAR_MODE: 1196 return (ctx->mode&=~larg); 1197 case SSL_CTRL_SET_MAX_SEND_FRAGMENT: 1198 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH) 1199 return (0); 1200 ctx->max_send_fragment = larg; 1201 return (1); 1202 default: 1203 return (ctx->method->ssl_ctx_ctrl(ctx, cmd, larg, parg)); 1204 } 1205 } 1206 1207 long 1208 SSL_CTX_callback_ctrl(SSL_CTX *ctx, int cmd, void (*fp)(void)) 1209 { 1210 switch (cmd) { 1211 case SSL_CTRL_SET_MSG_CALLBACK: 1212 ctx->msg_callback = (void (*)(int write_p, int version, 1213 int content_type, const void *buf, size_t len, SSL *ssl, 1214 void *arg))(fp); 1215 return (1); 1216 1217 default: 1218 return (ctx->method->ssl_ctx_callback_ctrl(ctx, cmd, fp)); 1219 } 1220 } 1221 1222 int 1223 ssl_cipher_id_cmp(const SSL_CIPHER *a, const SSL_CIPHER *b) 1224 { 1225 long l; 1226 1227 l = a->id - b->id; 1228 if (l == 0L) 1229 return (0); 1230 else 1231 return ((l > 0) ? 1:-1); 1232 } 1233 1234 int 1235 ssl_cipher_ptr_id_cmp(const SSL_CIPHER * const *ap, 1236 const SSL_CIPHER * const *bp) 1237 { 1238 long l; 1239 1240 l = (*ap)->id - (*bp)->id; 1241 if (l == 0L) 1242 return (0); 1243 else 1244 return ((l > 0) ? 1:-1); 1245 } 1246 1247 /* 1248 * Return a STACK of the ciphers available for the SSL and in order of 1249 * preference. 1250 */ 1251 STACK_OF(SSL_CIPHER) * 1252 SSL_get_ciphers(const SSL *s) 1253 { 1254 if (s != NULL) { 1255 if (s->cipher_list != NULL) { 1256 return (s->cipher_list); 1257 } else if ((s->ctx != NULL) && (s->ctx->cipher_list != NULL)) { 1258 return (s->ctx->cipher_list); 1259 } 1260 } 1261 return (NULL); 1262 } 1263 1264 /* 1265 * Return a STACK of the ciphers available for the SSL and in order of 1266 * algorithm id. 1267 */ 1268 STACK_OF(SSL_CIPHER) * 1269 ssl_get_ciphers_by_id(SSL *s) 1270 { 1271 if (s != NULL) { 1272 if (s->cipher_list_by_id != NULL) { 1273 return (s->cipher_list_by_id); 1274 } else if ((s->ctx != NULL) && 1275 (s->ctx->cipher_list_by_id != NULL)) { 1276 return (s->ctx->cipher_list_by_id); 1277 } 1278 } 1279 return (NULL); 1280 } 1281 1282 /* The old interface to get the same thing as SSL_get_ciphers(). */ 1283 const char * 1284 SSL_get_cipher_list(const SSL *s, int n) 1285 { 1286 SSL_CIPHER *c; 1287 STACK_OF(SSL_CIPHER) *sk; 1288 1289 if (s == NULL) 1290 return (NULL); 1291 sk = SSL_get_ciphers(s); 1292 if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= n)) 1293 return (NULL); 1294 c = sk_SSL_CIPHER_value(sk, n); 1295 if (c == NULL) 1296 return (NULL); 1297 return (c->name); 1298 } 1299 1300 /* Specify the ciphers to be used by default by the SSL_CTX. */ 1301 int 1302 SSL_CTX_set_cipher_list(SSL_CTX *ctx, const char *str) 1303 { 1304 STACK_OF(SSL_CIPHER) *sk; 1305 1306 sk = ssl_create_cipher_list(ctx->method, &ctx->cipher_list, 1307 &ctx->cipher_list_by_id, str); 1308 /* 1309 * ssl_create_cipher_list may return an empty stack if it 1310 * was unable to find a cipher matching the given rule string 1311 * (for example if the rule string specifies a cipher which 1312 * has been disabled). This is not an error as far as 1313 * ssl_create_cipher_list is concerned, and hence 1314 * ctx->cipher_list and ctx->cipher_list_by_id has been 1315 * updated. 1316 */ 1317 if (sk == NULL) 1318 return (0); 1319 else if (sk_SSL_CIPHER_num(sk) == 0) { 1320 SSLerr(SSL_F_SSL_CTX_SET_CIPHER_LIST, 1321 SSL_R_NO_CIPHER_MATCH); 1322 return (0); 1323 } 1324 return (1); 1325 } 1326 1327 /* Specify the ciphers to be used by the SSL. */ 1328 int 1329 SSL_set_cipher_list(SSL *s, const char *str) 1330 { 1331 STACK_OF(SSL_CIPHER) *sk; 1332 1333 sk = ssl_create_cipher_list(s->ctx->method, &s->cipher_list, 1334 &s->cipher_list_by_id, str); 1335 /* see comment in SSL_CTX_set_cipher_list */ 1336 if (sk == NULL) 1337 return (0); 1338 else if (sk_SSL_CIPHER_num(sk) == 0) { 1339 SSLerr(SSL_F_SSL_SET_CIPHER_LIST, 1340 SSL_R_NO_CIPHER_MATCH); 1341 return (0); 1342 } 1343 return (1); 1344 } 1345 1346 /* works well for SSLv2, not so good for SSLv3 */ 1347 char * 1348 SSL_get_shared_ciphers(const SSL *s, char *buf, int len) 1349 { 1350 char *end; 1351 STACK_OF(SSL_CIPHER) *sk; 1352 SSL_CIPHER *c; 1353 size_t curlen = 0; 1354 int i; 1355 1356 if (s->session == NULL || s->session->ciphers == NULL || len < 2) 1357 return (NULL); 1358 1359 sk = s->session->ciphers; 1360 if (sk_SSL_CIPHER_num(sk) == 0) 1361 return (NULL); 1362 1363 buf[0] = '\0'; 1364 for (i = 0; i < sk_SSL_CIPHER_num(sk); i++) { 1365 c = sk_SSL_CIPHER_value(sk, i); 1366 end = buf + curlen; 1367 if (strlcat(buf, c->name, len) >= len || 1368 (curlen = strlcat(buf, ":", len)) >= len) { 1369 /* remove truncated cipher from list */ 1370 *end = '\0'; 1371 break; 1372 } 1373 } 1374 /* remove trailing colon */ 1375 if ((end = strrchr(buf, ':')) != NULL) 1376 *end = '\0'; 1377 return (buf); 1378 } 1379 1380 int 1381 ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk, unsigned char *p) 1382 { 1383 int i; 1384 SSL_CIPHER *c; 1385 unsigned char *q; 1386 1387 if (sk == NULL) 1388 return (0); 1389 q = p; 1390 1391 for (i = 0; i < sk_SSL_CIPHER_num(sk); i++) { 1392 c = sk_SSL_CIPHER_value(sk, i); 1393 1394 /* Skip TLS v1.2 only ciphersuites if lower than v1.2 */ 1395 if ((c->algorithm_ssl & SSL_TLSV1_2) && 1396 (TLS1_get_client_version(s) < TLS1_2_VERSION)) 1397 continue; 1398 1399 s2n(ssl3_cipher_get_value(c), p); 1400 } 1401 1402 /* 1403 * If p == q, no ciphers and caller indicates an error. Otherwise 1404 * add SCSV if not renegotiating. 1405 */ 1406 if (p != q && !s->renegotiate) 1407 s2n(SSL3_CK_SCSV & SSL3_CK_VALUE_MASK, p); 1408 1409 return (p - q); 1410 } 1411 1412 STACK_OF(SSL_CIPHER) * 1413 ssl_bytes_to_cipher_list(SSL *s, unsigned char *p, int num) 1414 { 1415 const SSL_CIPHER *c; 1416 STACK_OF(SSL_CIPHER) *sk = NULL; 1417 int i; 1418 unsigned long cipher_id; 1419 uint16_t cipher_value; 1420 uint16_t max_version; 1421 1422 if (s->s3) 1423 s->s3->send_connection_binding = 0; 1424 1425 if ((num % SSL3_CIPHER_VALUE_SIZE) != 0) { 1426 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST, 1427 SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST); 1428 return (NULL); 1429 } 1430 1431 if ((sk = sk_SSL_CIPHER_new_null()) == NULL) { 1432 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST, ERR_R_MALLOC_FAILURE); 1433 goto err; 1434 } 1435 1436 for (i = 0; i < num; i += SSL3_CIPHER_VALUE_SIZE) { 1437 n2s(p, cipher_value); 1438 cipher_id = SSL3_CK_ID | cipher_value; 1439 1440 if (s->s3 != NULL && cipher_id == SSL3_CK_SCSV) { 1441 /* 1442 * TLS_EMPTY_RENEGOTIATION_INFO_SCSV is fatal if 1443 * renegotiating. 1444 */ 1445 if (s->renegotiate) { 1446 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST, 1447 SSL_R_SCSV_RECEIVED_WHEN_RENEGOTIATING); 1448 ssl3_send_alert(s, SSL3_AL_FATAL, 1449 SSL_AD_HANDSHAKE_FAILURE); 1450 1451 goto err; 1452 } 1453 s->s3->send_connection_binding = 1; 1454 continue; 1455 } 1456 1457 if (cipher_id == SSL3_CK_FALLBACK_SCSV) { 1458 /* 1459 * TLS_FALLBACK_SCSV indicates that the client 1460 * previously tried a higher protocol version. 1461 * Fail if the current version is an unexpected 1462 * downgrade. 1463 */ 1464 max_version = ssl_max_server_version(s); 1465 if (max_version == 0 || s->version < max_version) { 1466 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST, 1467 SSL_R_INAPPROPRIATE_FALLBACK); 1468 if (s->s3 != NULL) 1469 ssl3_send_alert(s, SSL3_AL_FATAL, 1470 SSL_AD_INAPPROPRIATE_FALLBACK); 1471 goto err; 1472 } 1473 continue; 1474 } 1475 1476 if ((c = ssl3_get_cipher_by_value(cipher_value)) != NULL) { 1477 if (!sk_SSL_CIPHER_push(sk, c)) { 1478 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST, 1479 ERR_R_MALLOC_FAILURE); 1480 goto err; 1481 } 1482 } 1483 } 1484 1485 return (sk); 1486 1487 err: 1488 sk_SSL_CIPHER_free(sk); 1489 1490 return (NULL); 1491 } 1492 1493 1494 /* 1495 * Return a servername extension value if provided in Client Hello, or NULL. 1496 * So far, only host_name types are defined (RFC 3546). 1497 */ 1498 const char * 1499 SSL_get_servername(const SSL *s, const int type) 1500 { 1501 if (type != TLSEXT_NAMETYPE_host_name) 1502 return (NULL); 1503 1504 return (s->session && !s->tlsext_hostname ? 1505 s->session->tlsext_hostname : 1506 s->tlsext_hostname); 1507 } 1508 1509 int 1510 SSL_get_servername_type(const SSL *s) 1511 { 1512 if (s->session && 1513 (!s->tlsext_hostname ? 1514 s->session->tlsext_hostname : s->tlsext_hostname)) 1515 return (TLSEXT_NAMETYPE_host_name); 1516 return (-1); 1517 } 1518 1519 /* 1520 * SSL_select_next_proto implements the standard protocol selection. It is 1521 * expected that this function is called from the callback set by 1522 * SSL_CTX_set_next_proto_select_cb. 1523 * 1524 * The protocol data is assumed to be a vector of 8-bit, length prefixed byte 1525 * strings. The length byte itself is not included in the length. A byte 1526 * string of length 0 is invalid. No byte string may be truncated. 1527 * 1528 * The current, but experimental algorithm for selecting the protocol is: 1529 * 1530 * 1) If the server doesn't support NPN then this is indicated to the 1531 * callback. In this case, the client application has to abort the connection 1532 * or have a default application level protocol. 1533 * 1534 * 2) If the server supports NPN, but advertises an empty list then the 1535 * client selects the first protcol in its list, but indicates via the 1536 * API that this fallback case was enacted. 1537 * 1538 * 3) Otherwise, the client finds the first protocol in the server's list 1539 * that it supports and selects this protocol. This is because it's 1540 * assumed that the server has better information about which protocol 1541 * a client should use. 1542 * 1543 * 4) If the client doesn't support any of the server's advertised 1544 * protocols, then this is treated the same as case 2. 1545 * 1546 * It returns either 1547 * OPENSSL_NPN_NEGOTIATED if a common protocol was found, or 1548 * OPENSSL_NPN_NO_OVERLAP if the fallback case was reached. 1549 */ 1550 int 1551 SSL_select_next_proto(unsigned char **out, unsigned char *outlen, 1552 const unsigned char *server, unsigned int server_len, 1553 const unsigned char *client, unsigned int client_len) 1554 { 1555 unsigned int i, j; 1556 const unsigned char *result; 1557 int status = OPENSSL_NPN_UNSUPPORTED; 1558 1559 /* 1560 * For each protocol in server preference order, 1561 * see if we support it. 1562 */ 1563 for (i = 0; i < server_len; ) { 1564 for (j = 0; j < client_len; ) { 1565 if (server[i] == client[j] && 1566 memcmp(&server[i + 1], 1567 &client[j + 1], server[i]) == 0) { 1568 /* We found a match */ 1569 result = &server[i]; 1570 status = OPENSSL_NPN_NEGOTIATED; 1571 goto found; 1572 } 1573 j += client[j]; 1574 j++; 1575 } 1576 i += server[i]; 1577 i++; 1578 } 1579 1580 /* There's no overlap between our protocols and the server's list. */ 1581 result = client; 1582 status = OPENSSL_NPN_NO_OVERLAP; 1583 1584 found: 1585 *out = (unsigned char *) result + 1; 1586 *outlen = result[0]; 1587 return (status); 1588 } 1589 1590 /* 1591 * SSL_get0_next_proto_negotiated sets *data and *len to point to the client's 1592 * requested protocol for this connection and returns 0. If the client didn't 1593 * request any protocol, then *data is set to NULL. 1594 * 1595 * Note that the client can request any protocol it chooses. The value returned 1596 * from this function need not be a member of the list of supported protocols 1597 * provided by the callback. 1598 */ 1599 void 1600 SSL_get0_next_proto_negotiated(const SSL *s, const unsigned char **data, 1601 unsigned *len) 1602 { 1603 *data = s->next_proto_negotiated; 1604 if (!*data) { 1605 *len = 0; 1606 } else { 1607 *len = s->next_proto_negotiated_len; 1608 } 1609 } 1610 1611 /* 1612 * SSL_CTX_set_next_protos_advertised_cb sets a callback that is called when a 1613 * TLS server needs a list of supported protocols for Next Protocol 1614 * Negotiation. The returned list must be in wire format. The list is returned 1615 * by setting |out| to point to it and |outlen| to its length. This memory will 1616 * not be modified, but one should assume that the SSL* keeps a reference to 1617 * it. 1618 * 1619 * The callback should return SSL_TLSEXT_ERR_OK if it wishes to advertise. 1620 * Otherwise, no such extension will be included in the ServerHello. 1621 */ 1622 void 1623 SSL_CTX_set_next_protos_advertised_cb(SSL_CTX *ctx, int (*cb) (SSL *ssl, 1624 const unsigned char **out, unsigned int *outlen, void *arg), void *arg) 1625 { 1626 ctx->next_protos_advertised_cb = cb; 1627 ctx->next_protos_advertised_cb_arg = arg; 1628 } 1629 1630 /* 1631 * SSL_CTX_set_next_proto_select_cb sets a callback that is called when a 1632 * client needs to select a protocol from the server's provided list. |out| 1633 * must be set to point to the selected protocol (which may be within |in|). 1634 * The length of the protocol name must be written into |outlen|. The server's 1635 * advertised protocols are provided in |in| and |inlen|. The callback can 1636 * assume that |in| is syntactically valid. 1637 * 1638 * The client must select a protocol. It is fatal to the connection if this 1639 * callback returns a value other than SSL_TLSEXT_ERR_OK. 1640 */ 1641 void 1642 SSL_CTX_set_next_proto_select_cb(SSL_CTX *ctx, int (*cb) (SSL *s, 1643 unsigned char **out, unsigned char *outlen, const unsigned char *in, 1644 unsigned int inlen, void *arg), void *arg) 1645 { 1646 ctx->next_proto_select_cb = cb; 1647 ctx->next_proto_select_cb_arg = arg; 1648 } 1649 1650 /* 1651 * SSL_CTX_set_alpn_protos sets the ALPN protocol list to the specified 1652 * protocols, which must be in wire-format (i.e. a series of non-empty, 1653 * 8-bit length-prefixed strings). Returns 0 on success. 1654 */ 1655 int 1656 SSL_CTX_set_alpn_protos(SSL_CTX *ctx, const unsigned char *protos, 1657 unsigned int protos_len) 1658 { 1659 free(ctx->alpn_client_proto_list); 1660 if ((ctx->alpn_client_proto_list = malloc(protos_len)) == NULL) 1661 return (1); 1662 memcpy(ctx->alpn_client_proto_list, protos, protos_len); 1663 ctx->alpn_client_proto_list_len = protos_len; 1664 1665 return (0); 1666 } 1667 1668 /* 1669 * SSL_set_alpn_protos sets the ALPN protocol list to the specified 1670 * protocols, which must be in wire-format (i.e. a series of non-empty, 1671 * 8-bit length-prefixed strings). Returns 0 on success. 1672 */ 1673 int 1674 SSL_set_alpn_protos(SSL *ssl, const unsigned char* protos, 1675 unsigned int protos_len) 1676 { 1677 free(ssl->alpn_client_proto_list); 1678 if ((ssl->alpn_client_proto_list = malloc(protos_len)) == NULL) 1679 return (1); 1680 memcpy(ssl->alpn_client_proto_list, protos, protos_len); 1681 ssl->alpn_client_proto_list_len = protos_len; 1682 1683 return (0); 1684 } 1685 1686 /* 1687 * SSL_CTX_set_alpn_select_cb sets a callback function that is called during 1688 * ClientHello processing in order to select an ALPN protocol from the 1689 * client's list of offered protocols. 1690 */ 1691 void 1692 SSL_CTX_set_alpn_select_cb(SSL_CTX* ctx, 1693 int (*cb) (SSL *ssl, const unsigned char **out, unsigned char *outlen, 1694 const unsigned char *in, unsigned int inlen, void *arg), void *arg) 1695 { 1696 ctx->alpn_select_cb = cb; 1697 ctx->alpn_select_cb_arg = arg; 1698 } 1699 1700 /* 1701 * SSL_get0_alpn_selected gets the selected ALPN protocol (if any). On return 1702 * it sets data to point to len bytes of protocol name (not including the 1703 * leading length-prefix byte). If the server didn't respond with* a negotiated 1704 * protocol then len will be zero. 1705 */ 1706 void 1707 SSL_get0_alpn_selected(const SSL *ssl, const unsigned char **data, 1708 unsigned *len) 1709 { 1710 *data = NULL; 1711 *len = 0; 1712 1713 if (ssl->s3 != NULL) { 1714 *data = ssl->s3->alpn_selected; 1715 *len = ssl->s3->alpn_selected_len; 1716 } 1717 } 1718 1719 int 1720 SSL_export_keying_material(SSL *s, unsigned char *out, size_t olen, 1721 const char *label, size_t llen, const unsigned char *p, size_t plen, 1722 int use_context) 1723 { 1724 if (s->version < TLS1_VERSION) 1725 return (-1); 1726 1727 return (s->method->ssl3_enc->export_keying_material(s, out, olen, 1728 label, llen, p, plen, use_context)); 1729 } 1730 1731 static unsigned long 1732 ssl_session_hash(const SSL_SESSION *a) 1733 { 1734 unsigned long l; 1735 1736 l = (unsigned long) 1737 ((unsigned int) a->session_id[0] )| 1738 ((unsigned int) a->session_id[1]<< 8L)| 1739 ((unsigned long)a->session_id[2]<<16L)| 1740 ((unsigned long)a->session_id[3]<<24L); 1741 return (l); 1742 } 1743 1744 /* 1745 * NB: If this function (or indeed the hash function which uses a sort of 1746 * coarser function than this one) is changed, ensure 1747 * SSL_CTX_has_matching_session_id() is checked accordingly. It relies on being 1748 * able to construct an SSL_SESSION that will collide with any existing session 1749 * with a matching session ID. 1750 */ 1751 static int 1752 ssl_session_cmp(const SSL_SESSION *a, const SSL_SESSION *b) 1753 { 1754 if (a->ssl_version != b->ssl_version) 1755 return (1); 1756 if (a->session_id_length != b->session_id_length) 1757 return (1); 1758 if (timingsafe_memcmp(a->session_id, b->session_id, a->session_id_length) != 0) 1759 return (1); 1760 return (0); 1761 } 1762 1763 /* 1764 * These wrapper functions should remain rather than redeclaring 1765 * SSL_SESSION_hash and SSL_SESSION_cmp for void* types and casting each 1766 * variable. The reason is that the functions aren't static, they're exposed via 1767 * ssl.h. 1768 */ 1769 static 1770 IMPLEMENT_LHASH_HASH_FN(ssl_session, SSL_SESSION) 1771 static 1772 IMPLEMENT_LHASH_COMP_FN(ssl_session, SSL_SESSION) 1773 1774 SSL_CTX * 1775 SSL_CTX_new(const SSL_METHOD *meth) 1776 { 1777 SSL_CTX *ret = NULL; 1778 1779 if (meth == NULL) { 1780 SSLerr(SSL_F_SSL_CTX_NEW, 1781 SSL_R_NULL_SSL_METHOD_PASSED); 1782 return (NULL); 1783 } 1784 1785 if (SSL_get_ex_data_X509_STORE_CTX_idx() < 0) { 1786 SSLerr(SSL_F_SSL_CTX_NEW, 1787 SSL_R_X509_VERIFICATION_SETUP_PROBLEMS); 1788 goto err; 1789 } 1790 ret = calloc(1, sizeof(SSL_CTX)); 1791 if (ret == NULL) 1792 goto err; 1793 1794 ret->method = meth; 1795 1796 ret->cert_store = NULL; 1797 ret->session_cache_mode = SSL_SESS_CACHE_SERVER; 1798 ret->session_cache_size = SSL_SESSION_CACHE_MAX_SIZE_DEFAULT; 1799 ret->session_cache_head = NULL; 1800 ret->session_cache_tail = NULL; 1801 1802 /* We take the system default */ 1803 ret->session_timeout = meth->get_timeout(); 1804 1805 ret->new_session_cb = 0; 1806 ret->remove_session_cb = 0; 1807 ret->get_session_cb = 0; 1808 ret->generate_session_id = 0; 1809 1810 memset((char *)&ret->stats, 0, sizeof(ret->stats)); 1811 1812 ret->references = 1; 1813 ret->quiet_shutdown = 0; 1814 1815 ret->info_callback = NULL; 1816 1817 ret->app_verify_callback = 0; 1818 ret->app_verify_arg = NULL; 1819 1820 ret->max_cert_list = SSL_MAX_CERT_LIST_DEFAULT; 1821 ret->read_ahead = 0; 1822 ret->msg_callback = 0; 1823 ret->msg_callback_arg = NULL; 1824 ret->verify_mode = SSL_VERIFY_NONE; 1825 ret->sid_ctx_length = 0; 1826 ret->default_verify_callback = NULL; 1827 if ((ret->cert = ssl_cert_new()) == NULL) 1828 goto err; 1829 1830 ret->default_passwd_callback = 0; 1831 ret->default_passwd_callback_userdata = NULL; 1832 ret->client_cert_cb = 0; 1833 ret->app_gen_cookie_cb = 0; 1834 ret->app_verify_cookie_cb = 0; 1835 1836 ret->sessions = lh_SSL_SESSION_new(); 1837 if (ret->sessions == NULL) 1838 goto err; 1839 ret->cert_store = X509_STORE_new(); 1840 if (ret->cert_store == NULL) 1841 goto err; 1842 1843 ssl_create_cipher_list(ret->method, &ret->cipher_list, 1844 &ret->cipher_list_by_id, SSL_DEFAULT_CIPHER_LIST); 1845 if (ret->cipher_list == NULL || 1846 sk_SSL_CIPHER_num(ret->cipher_list) <= 0) { 1847 SSLerr(SSL_F_SSL_CTX_NEW, 1848 SSL_R_LIBRARY_HAS_NO_CIPHERS); 1849 goto err2; 1850 } 1851 1852 ret->param = X509_VERIFY_PARAM_new(); 1853 if (!ret->param) 1854 goto err; 1855 1856 if ((ret->md5 = EVP_get_digestbyname("ssl3-md5")) == NULL) { 1857 SSLerr(SSL_F_SSL_CTX_NEW, 1858 SSL_R_UNABLE_TO_LOAD_SSL3_MD5_ROUTINES); 1859 goto err2; 1860 } 1861 if ((ret->sha1 = EVP_get_digestbyname("ssl3-sha1")) == NULL) { 1862 SSLerr(SSL_F_SSL_CTX_NEW, 1863 SSL_R_UNABLE_TO_LOAD_SSL3_SHA1_ROUTINES); 1864 goto err2; 1865 } 1866 1867 if ((ret->client_CA = sk_X509_NAME_new_null()) == NULL) 1868 goto err; 1869 1870 CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_CTX, ret, &ret->ex_data); 1871 1872 ret->extra_certs = NULL; 1873 1874 ret->max_send_fragment = SSL3_RT_MAX_PLAIN_LENGTH; 1875 1876 ret->tlsext_servername_callback = 0; 1877 ret->tlsext_servername_arg = NULL; 1878 1879 /* Setup RFC4507 ticket keys */ 1880 arc4random_buf(ret->tlsext_tick_key_name, 16); 1881 arc4random_buf(ret->tlsext_tick_hmac_key, 16); 1882 arc4random_buf(ret->tlsext_tick_aes_key, 16); 1883 1884 ret->tlsext_status_cb = 0; 1885 ret->tlsext_status_arg = NULL; 1886 1887 ret->next_protos_advertised_cb = 0; 1888 ret->next_proto_select_cb = 0; 1889 #ifndef OPENSSL_NO_ENGINE 1890 ret->client_cert_engine = NULL; 1891 #ifdef OPENSSL_SSL_CLIENT_ENGINE_AUTO 1892 #define eng_strx(x) #x 1893 #define eng_str(x) eng_strx(x) 1894 /* Use specific client engine automatically... ignore errors */ 1895 { 1896 ENGINE *eng; 1897 eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO)); 1898 if (!eng) { 1899 ERR_clear_error(); 1900 ENGINE_load_builtin_engines(); 1901 eng = ENGINE_by_id(eng_str( 1902 OPENSSL_SSL_CLIENT_ENGINE_AUTO)); 1903 } 1904 if (!eng || !SSL_CTX_set_client_cert_engine(ret, eng)) 1905 ERR_clear_error(); 1906 } 1907 #endif 1908 #endif 1909 /* 1910 * Default is to connect to non-RI servers. When RI is more widely 1911 * deployed might change this. 1912 */ 1913 ret->options |= SSL_OP_LEGACY_SERVER_CONNECT; 1914 1915 /* Disable SSLv3 by default. */ 1916 ret->options |= SSL_OP_NO_SSLv3; 1917 1918 return (ret); 1919 err: 1920 SSLerr(SSL_F_SSL_CTX_NEW, 1921 ERR_R_MALLOC_FAILURE); 1922 err2: 1923 SSL_CTX_free(ret); 1924 return (NULL); 1925 } 1926 1927 void 1928 SSL_CTX_free(SSL_CTX *a) 1929 { 1930 int i; 1931 1932 if (a == NULL) 1933 return; 1934 1935 i = CRYPTO_add(&a->references, -1, CRYPTO_LOCK_SSL_CTX); 1936 if (i > 0) 1937 return; 1938 1939 if (a->param) 1940 X509_VERIFY_PARAM_free(a->param); 1941 1942 /* 1943 * Free internal session cache. However: the remove_cb() may reference 1944 * the ex_data of SSL_CTX, thus the ex_data store can only be removed 1945 * after the sessions were flushed. 1946 * As the ex_data handling routines might also touch the session cache, 1947 * the most secure solution seems to be: empty (flush) the cache, then 1948 * free ex_data, then finally free the cache. 1949 * (See ticket [openssl.org #212].) 1950 */ 1951 if (a->sessions != NULL) 1952 SSL_CTX_flush_sessions(a, 0); 1953 1954 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_CTX, a, &a->ex_data); 1955 1956 if (a->sessions != NULL) 1957 lh_SSL_SESSION_free(a->sessions); 1958 1959 if (a->cert_store != NULL) 1960 X509_STORE_free(a->cert_store); 1961 if (a->cipher_list != NULL) 1962 sk_SSL_CIPHER_free(a->cipher_list); 1963 if (a->cipher_list_by_id != NULL) 1964 sk_SSL_CIPHER_free(a->cipher_list_by_id); 1965 if (a->cert != NULL) 1966 ssl_cert_free(a->cert); 1967 if (a->client_CA != NULL) 1968 sk_X509_NAME_pop_free(a->client_CA, X509_NAME_free); 1969 if (a->extra_certs != NULL) 1970 sk_X509_pop_free(a->extra_certs, X509_free); 1971 1972 #ifndef OPENSSL_NO_SRTP 1973 if (a->srtp_profiles) 1974 sk_SRTP_PROTECTION_PROFILE_free(a->srtp_profiles); 1975 #endif 1976 1977 #ifndef OPENSSL_NO_ENGINE 1978 if (a->client_cert_engine) 1979 ENGINE_finish(a->client_cert_engine); 1980 #endif 1981 1982 free(a->alpn_client_proto_list); 1983 1984 free(a); 1985 } 1986 1987 void 1988 SSL_CTX_set_default_passwd_cb(SSL_CTX *ctx, pem_password_cb *cb) 1989 { 1990 ctx->default_passwd_callback = cb; 1991 } 1992 1993 void 1994 SSL_CTX_set_default_passwd_cb_userdata(SSL_CTX *ctx, void *u) 1995 { 1996 ctx->default_passwd_callback_userdata = u; 1997 } 1998 1999 void 2000 SSL_CTX_set_cert_verify_callback(SSL_CTX *ctx, int (*cb)(X509_STORE_CTX *, 2001 void *), void *arg) 2002 { 2003 ctx->app_verify_callback = cb; 2004 ctx->app_verify_arg = arg; 2005 } 2006 2007 void 2008 SSL_CTX_set_verify(SSL_CTX *ctx, int mode, int (*cb)(int, X509_STORE_CTX *)) 2009 { 2010 ctx->verify_mode = mode; 2011 ctx->default_verify_callback = cb; 2012 } 2013 2014 void 2015 SSL_CTX_set_verify_depth(SSL_CTX *ctx, int depth) 2016 { 2017 X509_VERIFY_PARAM_set_depth(ctx->param, depth); 2018 } 2019 2020 void 2021 ssl_set_cert_masks(CERT *c, const SSL_CIPHER *cipher) 2022 { 2023 CERT_PKEY *cpk; 2024 int rsa_enc, rsa_sign, dh_tmp, dsa_sign; 2025 unsigned long mask_k, mask_a; 2026 int have_ecc_cert, ecdh_ok, ecdsa_ok; 2027 int have_ecdh_tmp; 2028 X509 *x = NULL; 2029 EVP_PKEY *ecc_pkey = NULL; 2030 int signature_nid = 0, pk_nid = 0, md_nid = 0; 2031 2032 if (c == NULL) 2033 return; 2034 2035 dh_tmp = (c->dh_tmp != NULL || c->dh_tmp_cb != NULL || 2036 c->dh_tmp_auto != 0); 2037 2038 have_ecdh_tmp = (c->ecdh_tmp != NULL || c->ecdh_tmp_cb != NULL || 2039 c->ecdh_tmp_auto != 0); 2040 cpk = &(c->pkeys[SSL_PKEY_RSA_ENC]); 2041 rsa_enc = (cpk->x509 != NULL && cpk->privatekey != NULL); 2042 cpk = &(c->pkeys[SSL_PKEY_RSA_SIGN]); 2043 rsa_sign = (cpk->x509 != NULL && cpk->privatekey != NULL); 2044 cpk = &(c->pkeys[SSL_PKEY_DSA_SIGN]); 2045 dsa_sign = (cpk->x509 != NULL && cpk->privatekey != NULL); 2046 /* FIX THIS EAY EAY EAY */ 2047 cpk = &(c->pkeys[SSL_PKEY_ECC]); 2048 have_ecc_cert = (cpk->x509 != NULL && cpk->privatekey != NULL); 2049 mask_k = 0; 2050 mask_a = 0; 2051 2052 cpk = &(c->pkeys[SSL_PKEY_GOST01]); 2053 if (cpk->x509 != NULL && cpk->privatekey !=NULL) { 2054 mask_k |= SSL_kGOST; 2055 mask_a |= SSL_aGOST01; 2056 } 2057 2058 if (rsa_enc) 2059 mask_k|=SSL_kRSA; 2060 2061 if (dh_tmp) 2062 mask_k|=SSL_kDHE; 2063 2064 if (rsa_enc || rsa_sign) 2065 mask_a|=SSL_aRSA; 2066 2067 if (dsa_sign) 2068 mask_a|=SSL_aDSS; 2069 2070 mask_a|=SSL_aNULL; 2071 2072 /* 2073 * An ECC certificate may be usable for ECDH and/or 2074 * ECDSA cipher suites depending on the key usage extension. 2075 */ 2076 if (have_ecc_cert) { 2077 /* This call populates extension flags (ex_flags) */ 2078 x = (c->pkeys[SSL_PKEY_ECC]).x509; 2079 X509_check_purpose(x, -1, 0); 2080 ecdh_ok = (x->ex_flags & EXFLAG_KUSAGE) ? 2081 (x->ex_kusage & X509v3_KU_KEY_AGREEMENT) : 1; 2082 ecdsa_ok = (x->ex_flags & EXFLAG_KUSAGE) ? 2083 (x->ex_kusage & X509v3_KU_DIGITAL_SIGNATURE) : 1; 2084 ecc_pkey = X509_get_pubkey(x); 2085 EVP_PKEY_free(ecc_pkey); 2086 if ((x->sig_alg) && (x->sig_alg->algorithm)) { 2087 signature_nid = OBJ_obj2nid(x->sig_alg->algorithm); 2088 OBJ_find_sigid_algs(signature_nid, &md_nid, &pk_nid); 2089 } 2090 if (ecdh_ok) { 2091 if (pk_nid == NID_rsaEncryption || pk_nid == NID_rsa) { 2092 mask_k|=SSL_kECDHr; 2093 mask_a|=SSL_aECDH; 2094 } 2095 if (pk_nid == NID_X9_62_id_ecPublicKey) { 2096 mask_k|=SSL_kECDHe; 2097 mask_a|=SSL_aECDH; 2098 } 2099 } 2100 if (ecdsa_ok) 2101 mask_a|=SSL_aECDSA; 2102 } 2103 2104 if (have_ecdh_tmp) { 2105 mask_k|=SSL_kECDHE; 2106 } 2107 2108 2109 c->mask_k = mask_k; 2110 c->mask_a = mask_a; 2111 c->valid = 1; 2112 } 2113 2114 /* This handy macro borrowed from crypto/x509v3/v3_purp.c */ 2115 #define ku_reject(x, usage) \ 2116 (((x)->ex_flags & EXFLAG_KUSAGE) && !((x)->ex_kusage & (usage))) 2117 2118 2119 int 2120 ssl_check_srvr_ecc_cert_and_alg(X509 *x, SSL *s) 2121 { 2122 unsigned long alg_k, alg_a; 2123 int signature_nid = 0, md_nid = 0, pk_nid = 0; 2124 const SSL_CIPHER *cs = s->s3->tmp.new_cipher; 2125 2126 alg_k = cs->algorithm_mkey; 2127 alg_a = cs->algorithm_auth; 2128 2129 /* This call populates the ex_flags field correctly */ 2130 X509_check_purpose(x, -1, 0); 2131 if ((x->sig_alg) && (x->sig_alg->algorithm)) { 2132 signature_nid = OBJ_obj2nid(x->sig_alg->algorithm); 2133 OBJ_find_sigid_algs(signature_nid, &md_nid, &pk_nid); 2134 } 2135 if (alg_k & SSL_kECDHe || alg_k & SSL_kECDHr) { 2136 /* key usage, if present, must allow key agreement */ 2137 if (ku_reject(x, X509v3_KU_KEY_AGREEMENT)) { 2138 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, 2139 SSL_R_ECC_CERT_NOT_FOR_KEY_AGREEMENT); 2140 return (0); 2141 } 2142 if ((alg_k & SSL_kECDHe) && TLS1_get_version(s) < 2143 TLS1_2_VERSION) { 2144 /* signature alg must be ECDSA */ 2145 if (pk_nid != NID_X9_62_id_ecPublicKey) { 2146 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, 2147 SSL_R_ECC_CERT_SHOULD_HAVE_SHA1_SIGNATURE); 2148 return (0); 2149 } 2150 } 2151 if ((alg_k & SSL_kECDHr) && TLS1_get_version(s) < 2152 TLS1_2_VERSION) { 2153 /* signature alg must be RSA */ 2154 if (pk_nid != NID_rsaEncryption && pk_nid != NID_rsa) { 2155 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, 2156 SSL_R_ECC_CERT_SHOULD_HAVE_RSA_SIGNATURE); 2157 return (0); 2158 } 2159 } 2160 } 2161 if (alg_a & SSL_aECDSA) { 2162 /* key usage, if present, must allow signing */ 2163 if (ku_reject(x, X509v3_KU_DIGITAL_SIGNATURE)) { 2164 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, 2165 SSL_R_ECC_CERT_NOT_FOR_SIGNING); 2166 return (0); 2167 } 2168 } 2169 2170 return (1); 2171 /* all checks are ok */ 2172 } 2173 2174 2175 /* THIS NEEDS CLEANING UP */ 2176 CERT_PKEY * 2177 ssl_get_server_send_pkey(const SSL *s) 2178 { 2179 unsigned long alg_k, alg_a; 2180 CERT *c; 2181 int i; 2182 2183 c = s->cert; 2184 ssl_set_cert_masks(c, s->s3->tmp.new_cipher); 2185 2186 alg_k = s->s3->tmp.new_cipher->algorithm_mkey; 2187 alg_a = s->s3->tmp.new_cipher->algorithm_auth; 2188 2189 if (alg_k & (SSL_kECDHr|SSL_kECDHe)) { 2190 /* 2191 * We don't need to look at SSL_kECDHE 2192 * since no certificate is needed for 2193 * anon ECDH and for authenticated 2194 * ECDHE, the check for the auth 2195 * algorithm will set i correctly 2196 * NOTE: For ECDH-RSA, we need an ECC 2197 * not an RSA cert but for EECDH-RSA 2198 * we need an RSA cert. Placing the 2199 * checks for SSL_kECDH before RSA 2200 * checks ensures the correct cert is chosen. 2201 */ 2202 i = SSL_PKEY_ECC; 2203 } else if (alg_a & SSL_aECDSA) { 2204 i = SSL_PKEY_ECC; 2205 } else if (alg_a & SSL_aDSS) { 2206 i = SSL_PKEY_DSA_SIGN; 2207 } else if (alg_a & SSL_aRSA) { 2208 if (c->pkeys[SSL_PKEY_RSA_ENC].x509 == NULL) 2209 i = SSL_PKEY_RSA_SIGN; 2210 else 2211 i = SSL_PKEY_RSA_ENC; 2212 } else if (alg_a & SSL_aGOST01) { 2213 i = SSL_PKEY_GOST01; 2214 } else { /* if (alg_a & SSL_aNULL) */ 2215 SSLerr(SSL_F_SSL_GET_SERVER_SEND_PKEY, ERR_R_INTERNAL_ERROR); 2216 return (NULL); 2217 } 2218 2219 return (c->pkeys + i); 2220 } 2221 2222 X509 * 2223 ssl_get_server_send_cert(const SSL *s) 2224 { 2225 CERT_PKEY *cpk; 2226 2227 cpk = ssl_get_server_send_pkey(s); 2228 if (!cpk) 2229 return (NULL); 2230 return (cpk->x509); 2231 } 2232 2233 EVP_PKEY * 2234 ssl_get_sign_pkey(SSL *s, const SSL_CIPHER *cipher, const EVP_MD **pmd) 2235 { 2236 unsigned long alg_a; 2237 CERT *c; 2238 int idx = -1; 2239 2240 alg_a = cipher->algorithm_auth; 2241 c = s->cert; 2242 2243 if ((alg_a & SSL_aDSS) && 2244 (c->pkeys[SSL_PKEY_DSA_SIGN].privatekey != NULL)) 2245 idx = SSL_PKEY_DSA_SIGN; 2246 else if (alg_a & SSL_aRSA) { 2247 if (c->pkeys[SSL_PKEY_RSA_SIGN].privatekey != NULL) 2248 idx = SSL_PKEY_RSA_SIGN; 2249 else if (c->pkeys[SSL_PKEY_RSA_ENC].privatekey != NULL) 2250 idx = SSL_PKEY_RSA_ENC; 2251 } else if ((alg_a & SSL_aECDSA) && 2252 (c->pkeys[SSL_PKEY_ECC].privatekey != NULL)) 2253 idx = SSL_PKEY_ECC; 2254 if (idx == -1) { 2255 SSLerr(SSL_F_SSL_GET_SIGN_PKEY, ERR_R_INTERNAL_ERROR); 2256 return (NULL); 2257 } 2258 if (pmd) 2259 *pmd = c->pkeys[idx].digest; 2260 return (c->pkeys[idx].privatekey); 2261 } 2262 2263 DH * 2264 ssl_get_auto_dh(SSL *s) 2265 { 2266 CERT_PKEY *cpk; 2267 int keylen; 2268 DH *dhp; 2269 2270 if (s->cert->dh_tmp_auto == 2) { 2271 keylen = 1024; 2272 } else if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) { 2273 keylen = 1024; 2274 if (s->s3->tmp.new_cipher->strength_bits == 256) 2275 keylen = 3072; 2276 } else { 2277 if ((cpk = ssl_get_server_send_pkey(s)) == NULL) 2278 return (NULL); 2279 if (cpk->privatekey == NULL || cpk->privatekey->pkey.dh == NULL) 2280 return (NULL); 2281 keylen = EVP_PKEY_bits(cpk->privatekey); 2282 } 2283 2284 if ((dhp = DH_new()) == NULL) 2285 return (NULL); 2286 2287 dhp->g = BN_new(); 2288 if (dhp->g != NULL) 2289 BN_set_word(dhp->g, 2); 2290 2291 if (keylen >= 8192) 2292 dhp->p = get_rfc3526_prime_8192(NULL); 2293 else if (keylen >= 4096) 2294 dhp->p = get_rfc3526_prime_4096(NULL); 2295 else if (keylen >= 3072) 2296 dhp->p = get_rfc3526_prime_3072(NULL); 2297 else if (keylen >= 2048) 2298 dhp->p = get_rfc3526_prime_2048(NULL); 2299 else if (keylen >= 1536) 2300 dhp->p = get_rfc3526_prime_1536(NULL); 2301 else 2302 dhp->p = get_rfc2409_prime_1024(NULL); 2303 2304 if (dhp->p == NULL || dhp->g == NULL) { 2305 DH_free(dhp); 2306 return (NULL); 2307 } 2308 return (dhp); 2309 } 2310 2311 void 2312 ssl_update_cache(SSL *s, int mode) 2313 { 2314 int i; 2315 2316 /* 2317 * If the session_id_length is 0, we are not supposed to cache it, 2318 * and it would be rather hard to do anyway :-) 2319 */ 2320 if (s->session->session_id_length == 0) 2321 return; 2322 2323 i = s->session_ctx->session_cache_mode; 2324 if ((i & mode) && (!s->hit) && ((i & SSL_SESS_CACHE_NO_INTERNAL_STORE) 2325 || SSL_CTX_add_session(s->session_ctx, s->session)) 2326 && (s->session_ctx->new_session_cb != NULL)) { 2327 CRYPTO_add(&s->session->references, 1, CRYPTO_LOCK_SSL_SESSION); 2328 if (!s->session_ctx->new_session_cb(s, s->session)) 2329 SSL_SESSION_free(s->session); 2330 } 2331 2332 /* auto flush every 255 connections */ 2333 if ((!(i & SSL_SESS_CACHE_NO_AUTO_CLEAR)) && 2334 ((i & mode) == mode)) { 2335 if ((((mode & SSL_SESS_CACHE_CLIENT) ? 2336 s->session_ctx->stats.sess_connect_good : 2337 s->session_ctx->stats.sess_accept_good) & 0xff) == 0xff) { 2338 SSL_CTX_flush_sessions(s->session_ctx, time(NULL)); 2339 } 2340 } 2341 } 2342 2343 const SSL_METHOD * 2344 SSL_get_ssl_method(SSL *s) 2345 { 2346 return (s->method); 2347 } 2348 2349 int 2350 SSL_set_ssl_method(SSL *s, const SSL_METHOD *meth) 2351 { 2352 int conn = -1; 2353 int ret = 1; 2354 2355 if (s->method != meth) { 2356 if (s->handshake_func != NULL) 2357 conn = (s->handshake_func == s->method->ssl_connect); 2358 2359 if (s->method->version == meth->version) 2360 s->method = meth; 2361 else { 2362 s->method->ssl_free(s); 2363 s->method = meth; 2364 ret = s->method->ssl_new(s); 2365 } 2366 2367 if (conn == 1) 2368 s->handshake_func = meth->ssl_connect; 2369 else if (conn == 0) 2370 s->handshake_func = meth->ssl_accept; 2371 } 2372 return (ret); 2373 } 2374 2375 int 2376 SSL_get_error(const SSL *s, int i) 2377 { 2378 int reason; 2379 unsigned long l; 2380 BIO *bio; 2381 2382 if (i > 0) 2383 return (SSL_ERROR_NONE); 2384 2385 /* Make things return SSL_ERROR_SYSCALL when doing SSL_do_handshake 2386 * etc, where we do encode the error */ 2387 if ((l = ERR_peek_error()) != 0) { 2388 if (ERR_GET_LIB(l) == ERR_LIB_SYS) 2389 return (SSL_ERROR_SYSCALL); 2390 else 2391 return (SSL_ERROR_SSL); 2392 } 2393 2394 if ((i < 0) && SSL_want_read(s)) { 2395 bio = SSL_get_rbio(s); 2396 if (BIO_should_read(bio)) { 2397 return (SSL_ERROR_WANT_READ); 2398 } else if (BIO_should_write(bio)) { 2399 /* 2400 * This one doesn't make too much sense... We never 2401 * try to write to the rbio, and an application 2402 * program where rbio and wbio are separate couldn't 2403 * even know what it should wait for. However if we 2404 * ever set s->rwstate incorrectly (so that we have 2405 * SSL_want_read(s) instead of SSL_want_write(s)) 2406 * and rbio and wbio *are* the same, this test works 2407 * around that bug; so it might be safer to keep it. 2408 */ 2409 return (SSL_ERROR_WANT_WRITE); 2410 } else if (BIO_should_io_special(bio)) { 2411 reason = BIO_get_retry_reason(bio); 2412 if (reason == BIO_RR_CONNECT) 2413 return (SSL_ERROR_WANT_CONNECT); 2414 else if (reason == BIO_RR_ACCEPT) 2415 return (SSL_ERROR_WANT_ACCEPT); 2416 else 2417 return (SSL_ERROR_SYSCALL); /* unknown */ 2418 } 2419 } 2420 2421 if ((i < 0) && SSL_want_write(s)) { 2422 bio = SSL_get_wbio(s); 2423 if (BIO_should_write(bio)) { 2424 return (SSL_ERROR_WANT_WRITE); 2425 } else if (BIO_should_read(bio)) { 2426 /* 2427 * See above (SSL_want_read(s) with 2428 * BIO_should_write(bio)) 2429 */ 2430 return (SSL_ERROR_WANT_READ); 2431 } else if (BIO_should_io_special(bio)) { 2432 reason = BIO_get_retry_reason(bio); 2433 if (reason == BIO_RR_CONNECT) 2434 return (SSL_ERROR_WANT_CONNECT); 2435 else if (reason == BIO_RR_ACCEPT) 2436 return (SSL_ERROR_WANT_ACCEPT); 2437 else 2438 return (SSL_ERROR_SYSCALL); 2439 } 2440 } 2441 if ((i < 0) && SSL_want_x509_lookup(s)) { 2442 return (SSL_ERROR_WANT_X509_LOOKUP); 2443 } 2444 2445 if (i == 0) { 2446 if ((s->shutdown & SSL_RECEIVED_SHUTDOWN) && 2447 (s->s3->warn_alert == SSL_AD_CLOSE_NOTIFY)) 2448 return (SSL_ERROR_ZERO_RETURN); 2449 } 2450 return (SSL_ERROR_SYSCALL); 2451 } 2452 2453 int 2454 SSL_do_handshake(SSL *s) 2455 { 2456 int ret = 1; 2457 2458 if (s->handshake_func == NULL) { 2459 SSLerr(SSL_F_SSL_DO_HANDSHAKE, 2460 SSL_R_CONNECTION_TYPE_NOT_SET); 2461 return (-1); 2462 } 2463 2464 s->method->ssl_renegotiate_check(s); 2465 2466 if (SSL_in_init(s) || SSL_in_before(s)) { 2467 ret = s->handshake_func(s); 2468 } 2469 return (ret); 2470 } 2471 2472 /* 2473 * For the next 2 functions, SSL_clear() sets shutdown and so 2474 * one of these calls will reset it 2475 */ 2476 void 2477 SSL_set_accept_state(SSL *s) 2478 { 2479 s->server = 1; 2480 s->shutdown = 0; 2481 s->state = SSL_ST_ACCEPT|SSL_ST_BEFORE; 2482 s->handshake_func = s->method->ssl_accept; 2483 /* clear the current cipher */ 2484 ssl_clear_cipher_ctx(s); 2485 ssl_clear_hash_ctx(&s->read_hash); 2486 ssl_clear_hash_ctx(&s->write_hash); 2487 } 2488 2489 void 2490 SSL_set_connect_state(SSL *s) 2491 { 2492 s->server = 0; 2493 s->shutdown = 0; 2494 s->state = SSL_ST_CONNECT|SSL_ST_BEFORE; 2495 s->handshake_func = s->method->ssl_connect; 2496 /* clear the current cipher */ 2497 ssl_clear_cipher_ctx(s); 2498 ssl_clear_hash_ctx(&s->read_hash); 2499 ssl_clear_hash_ctx(&s->write_hash); 2500 } 2501 2502 int 2503 ssl_undefined_function(SSL *s) 2504 { 2505 SSLerr(SSL_F_SSL_UNDEFINED_FUNCTION, 2506 ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); 2507 return (0); 2508 } 2509 2510 int 2511 ssl_undefined_void_function(void) 2512 { 2513 SSLerr(SSL_F_SSL_UNDEFINED_VOID_FUNCTION, 2514 ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); 2515 return (0); 2516 } 2517 2518 int 2519 ssl_undefined_const_function(const SSL *s) 2520 { 2521 SSLerr(SSL_F_SSL_UNDEFINED_CONST_FUNCTION, 2522 ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); 2523 return (0); 2524 } 2525 2526 SSL_METHOD * 2527 ssl_bad_method(int ver) 2528 { 2529 SSLerr(SSL_F_SSL_BAD_METHOD, 2530 ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); 2531 return (NULL); 2532 } 2533 2534 const char * 2535 ssl_version_string(int ver) 2536 { 2537 switch (ver) { 2538 case DTLS1_BAD_VER: 2539 return (SSL_TXT_DTLS1_BAD); 2540 case DTLS1_VERSION: 2541 return (SSL_TXT_DTLS1); 2542 case SSL3_VERSION: 2543 return (SSL_TXT_SSLV3); 2544 case TLS1_VERSION: 2545 return (SSL_TXT_TLSV1); 2546 case TLS1_1_VERSION: 2547 return (SSL_TXT_TLSV1_1); 2548 case TLS1_2_VERSION: 2549 return (SSL_TXT_TLSV1_2); 2550 default: 2551 return ("unknown"); 2552 } 2553 } 2554 2555 const char * 2556 SSL_get_version(const SSL *s) 2557 { 2558 return ssl_version_string(s->version); 2559 } 2560 2561 uint16_t 2562 ssl_max_server_version(SSL *s) 2563 { 2564 uint16_t max_version; 2565 2566 /* 2567 * The SSL method will be changed during version negotiation, as such 2568 * we want to use the SSL method from the context. 2569 */ 2570 max_version = s->ctx->method->version; 2571 2572 if (SSL_IS_DTLS(s)) 2573 return (DTLS1_VERSION); 2574 2575 if ((s->options & SSL_OP_NO_TLSv1_2) == 0 && 2576 max_version >= TLS1_2_VERSION) 2577 return (TLS1_2_VERSION); 2578 if ((s->options & SSL_OP_NO_TLSv1_1) == 0 && 2579 max_version >= TLS1_1_VERSION) 2580 return (TLS1_1_VERSION); 2581 if ((s->options & SSL_OP_NO_TLSv1) == 0 && 2582 max_version >= TLS1_VERSION) 2583 return (TLS1_VERSION); 2584 if ((s->options & SSL_OP_NO_SSLv3) == 0 && 2585 max_version >= SSL3_VERSION) 2586 return (SSL3_VERSION); 2587 2588 return (0); 2589 } 2590 2591 SSL * 2592 SSL_dup(SSL *s) 2593 { 2594 STACK_OF(X509_NAME) *sk; 2595 X509_NAME *xn; 2596 SSL *ret; 2597 int i; 2598 2599 if ((ret = SSL_new(SSL_get_SSL_CTX(s))) == NULL) 2600 return (NULL); 2601 2602 ret->version = s->version; 2603 ret->type = s->type; 2604 ret->method = s->method; 2605 2606 if (s->session != NULL) { 2607 /* This copies session-id, SSL_METHOD, sid_ctx, and 'cert' */ 2608 SSL_copy_session_id(ret, s); 2609 } else { 2610 /* 2611 * No session has been established yet, so we have to expect 2612 * that s->cert or ret->cert will be changed later -- 2613 * they should not both point to the same object, 2614 * and thus we can't use SSL_copy_session_id. 2615 */ 2616 2617 ret->method->ssl_free(ret); 2618 ret->method = s->method; 2619 ret->method->ssl_new(ret); 2620 2621 if (s->cert != NULL) { 2622 if (ret->cert != NULL) { 2623 ssl_cert_free(ret->cert); 2624 } 2625 ret->cert = ssl_cert_dup(s->cert); 2626 if (ret->cert == NULL) 2627 goto err; 2628 } 2629 2630 SSL_set_session_id_context(ret, 2631 s->sid_ctx, s->sid_ctx_length); 2632 } 2633 2634 ret->options = s->options; 2635 ret->mode = s->mode; 2636 SSL_set_max_cert_list(ret, SSL_get_max_cert_list(s)); 2637 SSL_set_read_ahead(ret, SSL_get_read_ahead(s)); 2638 ret->msg_callback = s->msg_callback; 2639 ret->msg_callback_arg = s->msg_callback_arg; 2640 SSL_set_verify(ret, SSL_get_verify_mode(s), 2641 SSL_get_verify_callback(s)); 2642 SSL_set_verify_depth(ret, SSL_get_verify_depth(s)); 2643 ret->generate_session_id = s->generate_session_id; 2644 2645 SSL_set_info_callback(ret, SSL_get_info_callback(s)); 2646 2647 ret->debug = s->debug; 2648 2649 /* copy app data, a little dangerous perhaps */ 2650 if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_SSL, 2651 &ret->ex_data, &s->ex_data)) 2652 goto err; 2653 2654 /* setup rbio, and wbio */ 2655 if (s->rbio != NULL) { 2656 if (!BIO_dup_state(s->rbio,(char *)&ret->rbio)) 2657 goto err; 2658 } 2659 if (s->wbio != NULL) { 2660 if (s->wbio != s->rbio) { 2661 if (!BIO_dup_state(s->wbio,(char *)&ret->wbio)) 2662 goto err; 2663 } else 2664 ret->wbio = ret->rbio; 2665 } 2666 ret->rwstate = s->rwstate; 2667 ret->in_handshake = s->in_handshake; 2668 ret->handshake_func = s->handshake_func; 2669 ret->server = s->server; 2670 ret->renegotiate = s->renegotiate; 2671 ret->new_session = s->new_session; 2672 ret->quiet_shutdown = s->quiet_shutdown; 2673 ret->shutdown = s->shutdown; 2674 /* SSL_dup does not really work at any state, though */ 2675 ret->state=s->state; 2676 ret->rstate = s->rstate; 2677 2678 /* 2679 * Would have to copy ret->init_buf, ret->init_msg, ret->init_num, 2680 * ret->init_off 2681 */ 2682 ret->init_num = 0; 2683 2684 ret->hit = s->hit; 2685 2686 X509_VERIFY_PARAM_inherit(ret->param, s->param); 2687 2688 /* dup the cipher_list and cipher_list_by_id stacks */ 2689 if (s->cipher_list != NULL) { 2690 if ((ret->cipher_list = 2691 sk_SSL_CIPHER_dup(s->cipher_list)) == NULL) 2692 goto err; 2693 } 2694 if (s->cipher_list_by_id != NULL) { 2695 if ((ret->cipher_list_by_id = 2696 sk_SSL_CIPHER_dup(s->cipher_list_by_id)) == NULL) 2697 goto err; 2698 } 2699 2700 /* Dup the client_CA list */ 2701 if (s->client_CA != NULL) { 2702 if ((sk = sk_X509_NAME_dup(s->client_CA)) == NULL) goto err; 2703 ret->client_CA = sk; 2704 for (i = 0; i < sk_X509_NAME_num(sk); i++) { 2705 xn = sk_X509_NAME_value(sk, i); 2706 if (sk_X509_NAME_set(sk, i, 2707 X509_NAME_dup(xn)) == NULL) { 2708 X509_NAME_free(xn); 2709 goto err; 2710 } 2711 } 2712 } 2713 2714 if (0) { 2715 err: 2716 if (ret != NULL) 2717 SSL_free(ret); 2718 ret = NULL; 2719 } 2720 return (ret); 2721 } 2722 2723 void 2724 ssl_clear_cipher_ctx(SSL *s) 2725 { 2726 EVP_CIPHER_CTX_free(s->enc_read_ctx); 2727 s->enc_read_ctx = NULL; 2728 EVP_CIPHER_CTX_free(s->enc_write_ctx); 2729 s->enc_write_ctx = NULL; 2730 2731 if (s->aead_read_ctx != NULL) { 2732 EVP_AEAD_CTX_cleanup(&s->aead_read_ctx->ctx); 2733 free(s->aead_read_ctx); 2734 s->aead_read_ctx = NULL; 2735 } 2736 if (s->aead_write_ctx != NULL) { 2737 EVP_AEAD_CTX_cleanup(&s->aead_write_ctx->ctx); 2738 free(s->aead_write_ctx); 2739 s->aead_write_ctx = NULL; 2740 } 2741 2742 } 2743 2744 /* Fix this function so that it takes an optional type parameter */ 2745 X509 * 2746 SSL_get_certificate(const SSL *s) 2747 { 2748 if (s->cert != NULL) 2749 return (s->cert->key->x509); 2750 else 2751 return (NULL); 2752 } 2753 2754 /* Fix this function so that it takes an optional type parameter */ 2755 EVP_PKEY * 2756 SSL_get_privatekey(SSL *s) 2757 { 2758 if (s->cert != NULL) 2759 return (s->cert->key->privatekey); 2760 else 2761 return (NULL); 2762 } 2763 2764 const SSL_CIPHER * 2765 SSL_get_current_cipher(const SSL *s) 2766 { 2767 if ((s->session != NULL) && (s->session->cipher != NULL)) 2768 return (s->session->cipher); 2769 return (NULL); 2770 } 2771 const void * 2772 SSL_get_current_compression(SSL *s) 2773 { 2774 return (NULL); 2775 } 2776 2777 const void * 2778 SSL_get_current_expansion(SSL *s) 2779 { 2780 return (NULL); 2781 } 2782 2783 int 2784 ssl_init_wbio_buffer(SSL *s, int push) 2785 { 2786 BIO *bbio; 2787 2788 if (s->bbio == NULL) { 2789 bbio = BIO_new(BIO_f_buffer()); 2790 if (bbio == NULL) 2791 return (0); 2792 s->bbio = bbio; 2793 } else { 2794 bbio = s->bbio; 2795 if (s->bbio == s->wbio) 2796 s->wbio = BIO_pop(s->wbio); 2797 } 2798 (void)BIO_reset(bbio); 2799 /* if (!BIO_set_write_buffer_size(bbio,16*1024)) */ 2800 if (!BIO_set_read_buffer_size(bbio, 1)) { 2801 SSLerr(SSL_F_SSL_INIT_WBIO_BUFFER, 2802 ERR_R_BUF_LIB); 2803 return (0); 2804 } 2805 if (push) { 2806 if (s->wbio != bbio) 2807 s->wbio = BIO_push(bbio, s->wbio); 2808 } else { 2809 if (s->wbio == bbio) 2810 s->wbio = BIO_pop(bbio); 2811 } 2812 return (1); 2813 } 2814 2815 void 2816 ssl_free_wbio_buffer(SSL *s) 2817 { 2818 if (s->bbio == NULL) 2819 return; 2820 2821 if (s->bbio == s->wbio) { 2822 /* remove buffering */ 2823 s->wbio = BIO_pop(s->wbio); 2824 } 2825 BIO_free(s->bbio); 2826 s->bbio = NULL; 2827 } 2828 2829 void 2830 SSL_CTX_set_quiet_shutdown(SSL_CTX *ctx, int mode) 2831 { 2832 ctx->quiet_shutdown = mode; 2833 } 2834 2835 int 2836 SSL_CTX_get_quiet_shutdown(const SSL_CTX *ctx) 2837 { 2838 return (ctx->quiet_shutdown); 2839 } 2840 2841 void 2842 SSL_set_quiet_shutdown(SSL *s, int mode) 2843 { 2844 s->quiet_shutdown = mode; 2845 } 2846 2847 int 2848 SSL_get_quiet_shutdown(const SSL *s) 2849 { 2850 return (s->quiet_shutdown); 2851 } 2852 2853 void 2854 SSL_set_shutdown(SSL *s, int mode) 2855 { 2856 s->shutdown = mode; 2857 } 2858 2859 int 2860 SSL_get_shutdown(const SSL *s) 2861 { 2862 return (s->shutdown); 2863 } 2864 2865 int 2866 SSL_version(const SSL *s) 2867 { 2868 return (s->version); 2869 } 2870 2871 SSL_CTX * 2872 SSL_get_SSL_CTX(const SSL *ssl) 2873 { 2874 return (ssl->ctx); 2875 } 2876 2877 SSL_CTX * 2878 SSL_set_SSL_CTX(SSL *ssl, SSL_CTX* ctx) 2879 { 2880 if (ssl->ctx == ctx) 2881 return (ssl->ctx); 2882 if (ctx == NULL) 2883 ctx = ssl->initial_ctx; 2884 if (ssl->cert != NULL) 2885 ssl_cert_free(ssl->cert); 2886 ssl->cert = ssl_cert_dup(ctx->cert); 2887 CRYPTO_add(&ctx->references, 1, CRYPTO_LOCK_SSL_CTX); 2888 SSL_CTX_free(ssl->ctx); /* decrement reference count */ 2889 ssl->ctx = ctx; 2890 return (ssl->ctx); 2891 } 2892 2893 int 2894 SSL_CTX_set_default_verify_paths(SSL_CTX *ctx) 2895 { 2896 return (X509_STORE_set_default_paths(ctx->cert_store)); 2897 } 2898 2899 int 2900 SSL_CTX_load_verify_locations(SSL_CTX *ctx, const char *CAfile, 2901 const char *CApath) 2902 { 2903 return (X509_STORE_load_locations(ctx->cert_store, CAfile, CApath)); 2904 } 2905 2906 int 2907 SSL_CTX_load_verify_mem(SSL_CTX *ctx, void *buf, int len) 2908 { 2909 return (X509_STORE_load_mem(ctx->cert_store, buf, len)); 2910 } 2911 2912 void 2913 SSL_set_info_callback(SSL *ssl, void (*cb)(const SSL *ssl, int type, int val)) 2914 { 2915 ssl->info_callback = cb; 2916 } 2917 2918 void (*SSL_get_info_callback(const SSL *ssl))(const SSL *ssl, int type, int val) 2919 { 2920 return (ssl->info_callback); 2921 } 2922 2923 int 2924 SSL_state(const SSL *ssl) 2925 { 2926 return (ssl->state); 2927 } 2928 2929 void 2930 SSL_set_state(SSL *ssl, int state) 2931 { 2932 ssl->state = state; 2933 } 2934 2935 void 2936 SSL_set_verify_result(SSL *ssl, long arg) 2937 { 2938 ssl->verify_result = arg; 2939 } 2940 2941 long 2942 SSL_get_verify_result(const SSL *ssl) 2943 { 2944 return (ssl->verify_result); 2945 } 2946 2947 int 2948 SSL_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func, 2949 CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func) 2950 { 2951 return (CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL, argl, argp, 2952 new_func, dup_func, free_func)); 2953 } 2954 2955 int 2956 SSL_set_ex_data(SSL *s, int idx, void *arg) 2957 { 2958 return (CRYPTO_set_ex_data(&s->ex_data, idx, arg)); 2959 } 2960 2961 void * 2962 SSL_get_ex_data(const SSL *s, int idx) 2963 { 2964 return (CRYPTO_get_ex_data(&s->ex_data, idx)); 2965 } 2966 2967 int 2968 SSL_CTX_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func, 2969 CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func) 2970 { 2971 return (CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL_CTX, argl, argp, 2972 new_func, dup_func, free_func)); 2973 } 2974 2975 int 2976 SSL_CTX_set_ex_data(SSL_CTX *s, int idx, void *arg) 2977 { 2978 return (CRYPTO_set_ex_data(&s->ex_data, idx, arg)); 2979 } 2980 2981 void * 2982 SSL_CTX_get_ex_data(const SSL_CTX *s, int idx) 2983 { 2984 return (CRYPTO_get_ex_data(&s->ex_data, idx)); 2985 } 2986 2987 int 2988 ssl_ok(SSL *s) 2989 { 2990 return (1); 2991 } 2992 2993 X509_STORE * 2994 SSL_CTX_get_cert_store(const SSL_CTX *ctx) 2995 { 2996 return (ctx->cert_store); 2997 } 2998 2999 void 3000 SSL_CTX_set_cert_store(SSL_CTX *ctx, X509_STORE *store) 3001 { 3002 if (ctx->cert_store != NULL) 3003 X509_STORE_free(ctx->cert_store); 3004 ctx->cert_store = store; 3005 } 3006 3007 int 3008 SSL_want(const SSL *s) 3009 { 3010 return (s->rwstate); 3011 } 3012 3013 void 3014 SSL_CTX_set_tmp_rsa_callback(SSL_CTX *ctx, RSA *(*cb)(SSL *ssl, int is_export, 3015 int keylength)) 3016 { 3017 SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb); 3018 } 3019 3020 void 3021 SSL_set_tmp_rsa_callback(SSL *ssl, RSA *(*cb)(SSL *ssl, int is_export, 3022 int keylength)) 3023 { 3024 SSL_callback_ctrl(ssl, SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb); 3025 } 3026 3027 void 3028 SSL_CTX_set_tmp_dh_callback(SSL_CTX *ctx, DH *(*dh)(SSL *ssl, int is_export, 3029 int keylength)) 3030 { 3031 SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh); 3032 } 3033 3034 void 3035 SSL_set_tmp_dh_callback(SSL *ssl, DH *(*dh)(SSL *ssl, int is_export, 3036 int keylength)) 3037 { 3038 SSL_callback_ctrl(ssl, SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh); 3039 } 3040 3041 void 3042 SSL_CTX_set_tmp_ecdh_callback(SSL_CTX *ctx, EC_KEY *(*ecdh)(SSL *ssl, 3043 int is_export, int keylength)) 3044 { 3045 SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_TMP_ECDH_CB, 3046 (void (*)(void))ecdh); 3047 } 3048 3049 void 3050 SSL_set_tmp_ecdh_callback(SSL *ssl, EC_KEY *(*ecdh)(SSL *ssl, int is_export, 3051 int keylength)) 3052 { 3053 SSL_callback_ctrl(ssl, SSL_CTRL_SET_TMP_ECDH_CB,(void (*)(void))ecdh); 3054 } 3055 3056 3057 void 3058 SSL_CTX_set_msg_callback(SSL_CTX *ctx, void (*cb)(int write_p, int version, 3059 int content_type, const void *buf, size_t len, SSL *ssl, void *arg)) 3060 { 3061 SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_MSG_CALLBACK, 3062 (void (*)(void))cb); 3063 } 3064 3065 void 3066 SSL_set_msg_callback(SSL *ssl, void (*cb)(int write_p, int version, 3067 int content_type, const void *buf, size_t len, SSL *ssl, void *arg)) 3068 { 3069 SSL_callback_ctrl(ssl, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb); 3070 } 3071 3072 /* 3073 * Allocates new EVP_MD_CTX and sets pointer to it into given pointer 3074 * variable, freeing EVP_MD_CTX previously stored in that variable, if 3075 * any. If EVP_MD pointer is passed, initializes ctx with this md 3076 * Returns newly allocated ctx; 3077 */ 3078 EVP_MD_CTX * 3079 ssl_replace_hash(EVP_MD_CTX **hash, const EVP_MD *md) 3080 { 3081 ssl_clear_hash_ctx(hash); 3082 *hash = EVP_MD_CTX_create(); 3083 if (*hash != NULL && md != NULL) { 3084 if (!EVP_DigestInit_ex(*hash, md, NULL)) { 3085 ssl_clear_hash_ctx(hash); 3086 return (NULL); 3087 } 3088 } 3089 return (*hash); 3090 } 3091 3092 void 3093 ssl_clear_hash_ctx(EVP_MD_CTX **hash) 3094 { 3095 if (*hash) 3096 EVP_MD_CTX_destroy(*hash); 3097 *hash = NULL; 3098 } 3099 3100 void 3101 SSL_set_debug(SSL *s, int debug) 3102 { 3103 s->debug = debug; 3104 } 3105 3106 int 3107 SSL_cache_hit(SSL *s) 3108 { 3109 return (s->hit); 3110 } 3111 3112 IMPLEMENT_OBJ_BSEARCH_GLOBAL_CMP_FN(SSL_CIPHER, SSL_CIPHER, ssl_cipher_id); 3113