1 /* $OpenBSD: ssl_lib.c,v 1.106 2015/08/27 06:21:15 doug 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 #include "bytestring.h" 159 160 const char *SSL_version_str = OPENSSL_VERSION_TEXT; 161 162 SSL3_ENC_METHOD ssl3_undef_enc_method = { 163 /* 164 * Evil casts, but these functions are only called if there's a 165 * library bug. 166 */ 167 .enc = (int (*)(SSL *, int))ssl_undefined_function, 168 .mac = (int (*)(SSL *, unsigned char *, int))ssl_undefined_function, 169 .setup_key_block = ssl_undefined_function, 170 .generate_master_secret = (int (*)(SSL *, unsigned char *, 171 unsigned char *, int))ssl_undefined_function, 172 .change_cipher_state = (int (*)(SSL*, int))ssl_undefined_function, 173 .final_finish_mac = (int (*)(SSL *, const char*, int, 174 unsigned char *))ssl_undefined_function, 175 .finish_mac_length = 0, 176 .cert_verify_mac = (int (*)(SSL *, int, 177 unsigned char *))ssl_undefined_function, 178 .client_finished_label = NULL, 179 .client_finished_label_len = 0, 180 .server_finished_label = NULL, 181 .server_finished_label_len = 0, 182 .alert_value = (int (*)(int))ssl_undefined_function, 183 .export_keying_material = (int (*)(SSL *, unsigned char *, size_t, 184 const char *, size_t, const unsigned char *, size_t, 185 int use_context))ssl_undefined_function, 186 .enc_flags = 0, 187 }; 188 189 int 190 SSL_clear(SSL *s) 191 { 192 if (s->method == NULL) { 193 SSLerr(SSL_F_SSL_CLEAR, SSL_R_NO_METHOD_SPECIFIED); 194 return (0); 195 } 196 197 if (ssl_clear_bad_session(s)) { 198 SSL_SESSION_free(s->session); 199 s->session = NULL; 200 } 201 202 s->error = 0; 203 s->hit = 0; 204 s->shutdown = 0; 205 206 if (s->renegotiate) { 207 SSLerr(SSL_F_SSL_CLEAR, ERR_R_INTERNAL_ERROR); 208 return (0); 209 } 210 211 s->type = 0; 212 213 s->state = SSL_ST_BEFORE|((s->server) ? SSL_ST_ACCEPT : SSL_ST_CONNECT); 214 215 s->version = s->method->version; 216 s->client_version = s->version; 217 s->rwstate = SSL_NOTHING; 218 s->rstate = SSL_ST_READ_HEADER; 219 220 BUF_MEM_free(s->init_buf); 221 s->init_buf = NULL; 222 223 ssl_clear_cipher_ctx(s); 224 ssl_clear_hash_ctx(&s->read_hash); 225 ssl_clear_hash_ctx(&s->write_hash); 226 227 s->first_packet = 0; 228 229 /* 230 * Check to see if we were changed into a different method, if 231 * so, revert back if we are not doing session-id reuse. 232 */ 233 if (!s->in_handshake && (s->session == NULL) && 234 (s->method != s->ctx->method)) { 235 s->method->ssl_free(s); 236 s->method = s->ctx->method; 237 if (!s->method->ssl_new(s)) 238 return (0); 239 } else 240 s->method->ssl_clear(s); 241 242 return (1); 243 } 244 245 /* Used to change an SSL_CTXs default SSL method type */ 246 int 247 SSL_CTX_set_ssl_version(SSL_CTX *ctx, const SSL_METHOD *meth) 248 { 249 STACK_OF(SSL_CIPHER) *sk; 250 251 ctx->method = meth; 252 253 sk = ssl_create_cipher_list(ctx->method, &(ctx->cipher_list), 254 &(ctx->cipher_list_by_id), SSL_DEFAULT_CIPHER_LIST); 255 if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= 0)) { 256 SSLerr(SSL_F_SSL_CTX_SET_SSL_VERSION, 257 SSL_R_SSL_LIBRARY_HAS_NO_CIPHERS); 258 return (0); 259 } 260 return (1); 261 } 262 263 SSL * 264 SSL_new(SSL_CTX *ctx) 265 { 266 SSL *s; 267 268 if (ctx == NULL) { 269 SSLerr(SSL_F_SSL_NEW, 270 SSL_R_NULL_SSL_CTX); 271 return (NULL); 272 } 273 if (ctx->method == NULL) { 274 SSLerr(SSL_F_SSL_NEW, 275 SSL_R_SSL_CTX_HAS_NO_DEFAULT_SSL_VERSION); 276 return (NULL); 277 } 278 279 s = calloc(1, sizeof(SSL)); 280 if (s == NULL) 281 goto err; 282 283 284 s->options = ctx->options; 285 s->mode = ctx->mode; 286 s->max_cert_list = ctx->max_cert_list; 287 288 if (ctx->cert != NULL) { 289 /* 290 * Earlier library versions used to copy the pointer to 291 * the CERT, not its contents; only when setting new 292 * parameters for the per-SSL copy, ssl_cert_new would be 293 * called (and the direct reference to the per-SSL_CTX 294 * settings would be lost, but those still were indirectly 295 * accessed for various purposes, and for that reason they 296 * used to be known as s->ctx->default_cert). 297 * Now we don't look at the SSL_CTX's CERT after having 298 * duplicated it once. 299 */ 300 s->cert = ssl_cert_dup(ctx->cert); 301 if (s->cert == NULL) 302 goto err; 303 } else 304 s->cert=NULL; /* Cannot really happen (see SSL_CTX_new) */ 305 306 s->read_ahead = ctx->read_ahead; 307 s->msg_callback = ctx->msg_callback; 308 s->msg_callback_arg = ctx->msg_callback_arg; 309 s->verify_mode = ctx->verify_mode; 310 s->sid_ctx_length = ctx->sid_ctx_length; 311 OPENSSL_assert(s->sid_ctx_length <= sizeof s->sid_ctx); 312 memcpy(&s->sid_ctx, &ctx->sid_ctx, sizeof(s->sid_ctx)); 313 s->verify_callback = ctx->default_verify_callback; 314 s->generate_session_id = ctx->generate_session_id; 315 316 s->param = X509_VERIFY_PARAM_new(); 317 if (!s->param) 318 goto err; 319 X509_VERIFY_PARAM_inherit(s->param, ctx->param); 320 s->quiet_shutdown = ctx->quiet_shutdown; 321 s->max_send_fragment = ctx->max_send_fragment; 322 323 CRYPTO_add(&ctx->references, 1, CRYPTO_LOCK_SSL_CTX); 324 s->ctx = ctx; 325 s->tlsext_debug_cb = 0; 326 s->tlsext_debug_arg = NULL; 327 s->tlsext_ticket_expected = 0; 328 s->tlsext_status_type = -1; 329 s->tlsext_status_expected = 0; 330 s->tlsext_ocsp_ids = NULL; 331 s->tlsext_ocsp_exts = NULL; 332 s->tlsext_ocsp_resp = NULL; 333 s->tlsext_ocsp_resplen = -1; 334 CRYPTO_add(&ctx->references, 1, CRYPTO_LOCK_SSL_CTX); 335 s->initial_ctx = ctx; 336 s->next_proto_negotiated = NULL; 337 338 if (s->ctx->alpn_client_proto_list != NULL) { 339 s->alpn_client_proto_list = 340 malloc(s->ctx->alpn_client_proto_list_len); 341 if (s->alpn_client_proto_list == NULL) 342 goto err; 343 memcpy(s->alpn_client_proto_list, 344 s->ctx->alpn_client_proto_list, 345 s->ctx->alpn_client_proto_list_len); 346 s->alpn_client_proto_list_len = 347 s->ctx->alpn_client_proto_list_len; 348 } 349 350 s->verify_result = X509_V_OK; 351 352 s->method = ctx->method; 353 354 if (!s->method->ssl_new(s)) 355 goto err; 356 357 s->references = 1; 358 s->server = (ctx->method->ssl_accept == ssl_undefined_function) ? 0 : 1; 359 360 SSL_clear(s); 361 362 CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data); 363 364 365 return (s); 366 err: 367 if (s != NULL) { 368 if (s->cert != NULL) 369 ssl_cert_free(s->cert); 370 SSL_CTX_free(s->ctx); /* decrement reference count */ 371 free(s); 372 } 373 SSLerr(SSL_F_SSL_NEW, 374 ERR_R_MALLOC_FAILURE); 375 return (NULL); 376 } 377 378 int 379 SSL_CTX_set_session_id_context(SSL_CTX *ctx, const unsigned char *sid_ctx, 380 unsigned int sid_ctx_len) 381 { 382 if (sid_ctx_len > sizeof ctx->sid_ctx) { 383 SSLerr(SSL_F_SSL_CTX_SET_SESSION_ID_CONTEXT, 384 SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG); 385 return (0); 386 } 387 ctx->sid_ctx_length = sid_ctx_len; 388 memcpy(ctx->sid_ctx, sid_ctx, sid_ctx_len); 389 390 return (1); 391 } 392 393 int 394 SSL_set_session_id_context(SSL *ssl, const unsigned char *sid_ctx, 395 unsigned int sid_ctx_len) 396 { 397 if (sid_ctx_len > SSL_MAX_SID_CTX_LENGTH) { 398 SSLerr(SSL_F_SSL_SET_SESSION_ID_CONTEXT, 399 SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG); 400 return (0); 401 } 402 ssl->sid_ctx_length = sid_ctx_len; 403 memcpy(ssl->sid_ctx, sid_ctx, sid_ctx_len); 404 405 return (1); 406 } 407 408 int 409 SSL_CTX_set_generate_session_id(SSL_CTX *ctx, GEN_SESSION_CB cb) 410 { 411 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX); 412 ctx->generate_session_id = cb; 413 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX); 414 return (1); 415 } 416 417 int 418 SSL_set_generate_session_id(SSL *ssl, GEN_SESSION_CB cb) 419 { 420 CRYPTO_w_lock(CRYPTO_LOCK_SSL); 421 ssl->generate_session_id = cb; 422 CRYPTO_w_unlock(CRYPTO_LOCK_SSL); 423 return (1); 424 } 425 426 int 427 SSL_has_matching_session_id(const SSL *ssl, const unsigned char *id, 428 unsigned int id_len) 429 { 430 /* 431 * A quick examination of SSL_SESSION_hash and SSL_SESSION_cmp 432 * shows how we can "construct" a session to give us the desired 433 * check - ie. to find if there's a session in the hash table 434 * that would conflict with any new session built out of this 435 * id/id_len and the ssl_version in use by this SSL. 436 */ 437 SSL_SESSION r, *p; 438 439 if (id_len > sizeof r.session_id) 440 return (0); 441 442 r.ssl_version = ssl->version; 443 r.session_id_length = id_len; 444 memcpy(r.session_id, id, id_len); 445 446 CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX); 447 p = lh_SSL_SESSION_retrieve(ssl->ctx->sessions, &r); 448 CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX); 449 return (p != NULL); 450 } 451 452 int 453 SSL_CTX_set_purpose(SSL_CTX *s, int purpose) 454 { 455 return (X509_VERIFY_PARAM_set_purpose(s->param, purpose)); 456 } 457 458 int 459 SSL_set_purpose(SSL *s, int purpose) 460 { 461 return (X509_VERIFY_PARAM_set_purpose(s->param, purpose)); 462 } 463 464 int 465 SSL_CTX_set_trust(SSL_CTX *s, int trust) 466 { 467 return (X509_VERIFY_PARAM_set_trust(s->param, trust)); 468 } 469 470 int 471 SSL_set_trust(SSL *s, int trust) 472 { 473 return (X509_VERIFY_PARAM_set_trust(s->param, trust)); 474 } 475 476 int 477 SSL_CTX_set1_param(SSL_CTX *ctx, X509_VERIFY_PARAM *vpm) 478 { 479 return (X509_VERIFY_PARAM_set1(ctx->param, vpm)); 480 } 481 482 int 483 SSL_set1_param(SSL *ssl, X509_VERIFY_PARAM *vpm) 484 { 485 return (X509_VERIFY_PARAM_set1(ssl->param, vpm)); 486 } 487 488 void 489 SSL_free(SSL *s) 490 { 491 int i; 492 493 if (s == NULL) 494 return; 495 496 i = CRYPTO_add(&s->references, -1, CRYPTO_LOCK_SSL); 497 if (i > 0) 498 return; 499 500 if (s->param) 501 X509_VERIFY_PARAM_free(s->param); 502 503 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data); 504 505 if (s->bbio != NULL) { 506 /* If the buffering BIO is in place, pop it off */ 507 if (s->bbio == s->wbio) { 508 s->wbio = BIO_pop(s->wbio); 509 } 510 BIO_free(s->bbio); 511 s->bbio = NULL; 512 } 513 if (s->rbio != NULL) 514 BIO_free_all(s->rbio); 515 if ((s->wbio != NULL) && (s->wbio != s->rbio)) 516 BIO_free_all(s->wbio); 517 518 if (s->init_buf != NULL) 519 BUF_MEM_free(s->init_buf); 520 521 /* add extra stuff */ 522 if (s->cipher_list != NULL) 523 sk_SSL_CIPHER_free(s->cipher_list); 524 if (s->cipher_list_by_id != NULL) 525 sk_SSL_CIPHER_free(s->cipher_list_by_id); 526 527 /* Make the next call work :-) */ 528 if (s->session != NULL) { 529 ssl_clear_bad_session(s); 530 SSL_SESSION_free(s->session); 531 } 532 533 ssl_clear_cipher_ctx(s); 534 ssl_clear_hash_ctx(&s->read_hash); 535 ssl_clear_hash_ctx(&s->write_hash); 536 537 if (s->cert != NULL) 538 ssl_cert_free(s->cert); 539 /* Free up if allocated */ 540 541 free(s->tlsext_hostname); 542 SSL_CTX_free(s->initial_ctx); 543 free(s->tlsext_ecpointformatlist); 544 free(s->tlsext_ellipticcurvelist); 545 if (s->tlsext_ocsp_exts) 546 sk_X509_EXTENSION_pop_free(s->tlsext_ocsp_exts, 547 X509_EXTENSION_free); 548 if (s->tlsext_ocsp_ids) 549 sk_OCSP_RESPID_pop_free(s->tlsext_ocsp_ids, OCSP_RESPID_free); 550 free(s->tlsext_ocsp_resp); 551 552 if (s->client_CA != NULL) 553 sk_X509_NAME_pop_free(s->client_CA, X509_NAME_free); 554 555 if (s->method != NULL) 556 s->method->ssl_free(s); 557 558 SSL_CTX_free(s->ctx); 559 560 561 free(s->next_proto_negotiated); 562 free(s->alpn_client_proto_list); 563 564 #ifndef OPENSSL_NO_SRTP 565 if (s->srtp_profiles) 566 sk_SRTP_PROTECTION_PROFILE_free(s->srtp_profiles); 567 #endif 568 569 free(s); 570 } 571 572 void 573 SSL_set_bio(SSL *s, BIO *rbio, BIO *wbio) 574 { 575 /* If the output buffering BIO is still in place, remove it */ 576 if (s->bbio != NULL) { 577 if (s->wbio == s->bbio) { 578 s->wbio = s->wbio->next_bio; 579 s->bbio->next_bio = NULL; 580 } 581 } 582 if ((s->rbio != NULL) && (s->rbio != rbio)) 583 BIO_free_all(s->rbio); 584 if ((s->wbio != NULL) && (s->wbio != wbio) && (s->rbio != s->wbio)) 585 BIO_free_all(s->wbio); 586 s->rbio = rbio; 587 s->wbio = wbio; 588 } 589 590 BIO * 591 SSL_get_rbio(const SSL *s) 592 { 593 return (s->rbio); 594 } 595 596 BIO * 597 SSL_get_wbio(const SSL *s) 598 { 599 return (s->wbio); 600 } 601 602 int 603 SSL_get_fd(const SSL *s) 604 { 605 return (SSL_get_rfd(s)); 606 } 607 608 int 609 SSL_get_rfd(const SSL *s) 610 { 611 int ret = -1; 612 BIO *b, *r; 613 614 b = SSL_get_rbio(s); 615 r = BIO_find_type(b, BIO_TYPE_DESCRIPTOR); 616 if (r != NULL) 617 BIO_get_fd(r, &ret); 618 return (ret); 619 } 620 621 int 622 SSL_get_wfd(const SSL *s) 623 { 624 int ret = -1; 625 BIO *b, *r; 626 627 b = SSL_get_wbio(s); 628 r = BIO_find_type(b, BIO_TYPE_DESCRIPTOR); 629 if (r != NULL) 630 BIO_get_fd(r, &ret); 631 return (ret); 632 } 633 634 int 635 SSL_set_fd(SSL *s, int fd) 636 { 637 int ret = 0; 638 BIO *bio = NULL; 639 640 bio = BIO_new(BIO_s_socket()); 641 642 if (bio == NULL) { 643 SSLerr(SSL_F_SSL_SET_FD, 644 ERR_R_BUF_LIB); 645 goto err; 646 } 647 BIO_set_fd(bio, fd, BIO_NOCLOSE); 648 SSL_set_bio(s, bio, bio); 649 ret = 1; 650 err: 651 return (ret); 652 } 653 654 int 655 SSL_set_wfd(SSL *s, int fd) 656 { 657 int ret = 0; 658 BIO *bio = NULL; 659 660 if ((s->rbio == NULL) || (BIO_method_type(s->rbio) != BIO_TYPE_SOCKET) 661 || ((int)BIO_get_fd(s->rbio, NULL) != fd)) { 662 bio = BIO_new(BIO_s_socket()); 663 664 if (bio == NULL) { 665 SSLerr(SSL_F_SSL_SET_WFD, 666 ERR_R_BUF_LIB); 667 goto err; 668 } 669 BIO_set_fd(bio, fd, BIO_NOCLOSE); 670 SSL_set_bio(s, SSL_get_rbio(s), bio); 671 } else 672 SSL_set_bio(s, SSL_get_rbio(s), SSL_get_rbio(s)); 673 ret = 1; 674 err: 675 return (ret); 676 } 677 678 int 679 SSL_set_rfd(SSL *s, int fd) 680 { 681 int ret = 0; 682 BIO *bio = NULL; 683 684 if ((s->wbio == NULL) || (BIO_method_type(s->wbio) != BIO_TYPE_SOCKET) 685 || ((int)BIO_get_fd(s->wbio, NULL) != fd)) { 686 bio = BIO_new(BIO_s_socket()); 687 688 if (bio == NULL) { 689 SSLerr(SSL_F_SSL_SET_RFD, 690 ERR_R_BUF_LIB); 691 goto err; 692 } 693 BIO_set_fd(bio, fd, BIO_NOCLOSE); 694 SSL_set_bio(s, bio, SSL_get_wbio(s)); 695 } else 696 SSL_set_bio(s, SSL_get_wbio(s), SSL_get_wbio(s)); 697 ret = 1; 698 err: 699 return (ret); 700 } 701 702 703 /* return length of latest Finished message we sent, copy to 'buf' */ 704 size_t 705 SSL_get_finished(const SSL *s, void *buf, size_t count) 706 { 707 size_t ret = 0; 708 709 if (s->s3 != NULL) { 710 ret = s->s3->tmp.finish_md_len; 711 if (count > ret) 712 count = ret; 713 memcpy(buf, s->s3->tmp.finish_md, count); 714 } 715 return (ret); 716 } 717 718 /* return length of latest Finished message we expected, copy to 'buf' */ 719 size_t 720 SSL_get_peer_finished(const SSL *s, void *buf, size_t count) 721 { 722 size_t ret = 0; 723 724 if (s->s3 != NULL) { 725 ret = s->s3->tmp.peer_finish_md_len; 726 if (count > ret) 727 count = ret; 728 memcpy(buf, s->s3->tmp.peer_finish_md, count); 729 } 730 return (ret); 731 } 732 733 734 int 735 SSL_get_verify_mode(const SSL *s) 736 { 737 return (s->verify_mode); 738 } 739 740 int 741 SSL_get_verify_depth(const SSL *s) 742 { 743 return (X509_VERIFY_PARAM_get_depth(s->param)); 744 } 745 746 int 747 (*SSL_get_verify_callback(const SSL *s))(int, X509_STORE_CTX *) 748 { 749 return (s->verify_callback); 750 } 751 752 int 753 SSL_CTX_get_verify_mode(const SSL_CTX *ctx) 754 { 755 return (ctx->verify_mode); 756 } 757 758 int 759 SSL_CTX_get_verify_depth(const SSL_CTX *ctx) 760 { 761 return (X509_VERIFY_PARAM_get_depth(ctx->param)); 762 } 763 764 int (*SSL_CTX_get_verify_callback(const SSL_CTX *ctx))(int, X509_STORE_CTX *) 765 { 766 return (ctx->default_verify_callback); 767 } 768 769 void 770 SSL_set_verify(SSL *s, int mode, 771 int (*callback)(int ok, X509_STORE_CTX *ctx)) 772 { 773 s->verify_mode = mode; 774 if (callback != NULL) 775 s->verify_callback = callback; 776 } 777 778 void 779 SSL_set_verify_depth(SSL *s, int depth) 780 { 781 X509_VERIFY_PARAM_set_depth(s->param, depth); 782 } 783 784 void 785 SSL_set_read_ahead(SSL *s, int yes) 786 { 787 s->read_ahead = yes; 788 } 789 790 int 791 SSL_get_read_ahead(const SSL *s) 792 { 793 return (s->read_ahead); 794 } 795 796 int 797 SSL_pending(const SSL *s) 798 { 799 /* 800 * SSL_pending cannot work properly if read-ahead is enabled 801 * (SSL_[CTX_]ctrl(..., SSL_CTRL_SET_READ_AHEAD, 1, NULL)), 802 * and it is impossible to fix since SSL_pending cannot report 803 * errors that may be observed while scanning the new data. 804 * (Note that SSL_pending() is often used as a boolean value, 805 * so we'd better not return -1.) 806 */ 807 return (s->method->ssl_pending(s)); 808 } 809 810 X509 * 811 SSL_get_peer_certificate(const SSL *s) 812 { 813 X509 *r; 814 815 if ((s == NULL) || (s->session == NULL)) 816 r = NULL; 817 else 818 r = s->session->peer; 819 820 if (r == NULL) 821 return (r); 822 823 CRYPTO_add(&r->references, 1, CRYPTO_LOCK_X509); 824 825 return (r); 826 } 827 828 STACK_OF(X509) * 829 SSL_get_peer_cert_chain(const SSL *s) 830 { 831 STACK_OF(X509) *r; 832 833 if ((s == NULL) || (s->session == NULL) || 834 (s->session->sess_cert == NULL)) 835 r = NULL; 836 else 837 r = s->session->sess_cert->cert_chain; 838 839 /* 840 * If we are a client, cert_chain includes the peer's own 841 * certificate; 842 * if we are a server, it does not. 843 */ 844 return (r); 845 } 846 847 /* 848 * Now in theory, since the calling process own 't' it should be safe to 849 * modify. We need to be able to read f without being hassled 850 */ 851 void 852 SSL_copy_session_id(SSL *t, const SSL *f) 853 { 854 CERT *tmp; 855 856 /* Do we need to to SSL locking? */ 857 SSL_set_session(t, SSL_get_session(f)); 858 859 /* 860 * What if we are setup as SSLv2 but want to talk SSLv3 or 861 * vice-versa. 862 */ 863 if (t->method != f->method) { 864 t->method->ssl_free(t); /* cleanup current */ 865 t->method=f->method; /* change method */ 866 t->method->ssl_new(t); /* setup new */ 867 } 868 869 tmp = t->cert; 870 if (f->cert != NULL) { 871 CRYPTO_add(&f->cert->references, 1, CRYPTO_LOCK_SSL_CERT); 872 t->cert = f->cert; 873 } else 874 t->cert = NULL; 875 if (tmp != NULL) 876 ssl_cert_free(tmp); 877 SSL_set_session_id_context(t, f->sid_ctx, f->sid_ctx_length); 878 } 879 880 /* Fix this so it checks all the valid key/cert options */ 881 int 882 SSL_CTX_check_private_key(const SSL_CTX *ctx) 883 { 884 if ((ctx == NULL) || (ctx->cert == NULL) || 885 (ctx->cert->key->x509 == NULL)) { 886 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY, 887 SSL_R_NO_CERTIFICATE_ASSIGNED); 888 return (0); 889 } 890 if (ctx->cert->key->privatekey == NULL) { 891 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY, 892 SSL_R_NO_PRIVATE_KEY_ASSIGNED); 893 return (0); 894 } 895 return (X509_check_private_key(ctx->cert->key->x509, 896 ctx->cert->key->privatekey)); 897 } 898 899 /* Fix this function so that it takes an optional type parameter */ 900 int 901 SSL_check_private_key(const SSL *ssl) 902 { 903 if (ssl == NULL) { 904 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY, 905 ERR_R_PASSED_NULL_PARAMETER); 906 return (0); 907 } 908 if (ssl->cert == NULL) { 909 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY, 910 SSL_R_NO_CERTIFICATE_ASSIGNED); 911 return (0); 912 } 913 if (ssl->cert->key->x509 == NULL) { 914 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY, 915 SSL_R_NO_CERTIFICATE_ASSIGNED); 916 return (0); 917 } 918 if (ssl->cert->key->privatekey == NULL) { 919 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY, 920 SSL_R_NO_PRIVATE_KEY_ASSIGNED); 921 return (0); 922 } 923 return (X509_check_private_key(ssl->cert->key->x509, 924 ssl->cert->key->privatekey)); 925 } 926 927 int 928 SSL_accept(SSL *s) 929 { 930 if (s->handshake_func == 0) 931 SSL_set_accept_state(s); /* Not properly initialized yet */ 932 933 return (s->method->ssl_accept(s)); 934 } 935 936 int 937 SSL_connect(SSL *s) 938 { 939 if (s->handshake_func == 0) 940 SSL_set_connect_state(s); /* Not properly initialized yet */ 941 942 return (s->method->ssl_connect(s)); 943 } 944 945 long 946 SSL_get_default_timeout(const SSL *s) 947 { 948 return (s->method->get_timeout()); 949 } 950 951 int 952 SSL_read(SSL *s, void *buf, int num) 953 { 954 if (s->handshake_func == 0) { 955 SSLerr(SSL_F_SSL_READ, 956 SSL_R_UNINITIALIZED); 957 return (-1); 958 } 959 960 if (s->shutdown & SSL_RECEIVED_SHUTDOWN) { 961 s->rwstate = SSL_NOTHING; 962 return (0); 963 } 964 return (s->method->ssl_read(s, buf, num)); 965 } 966 967 int 968 SSL_peek(SSL *s, void *buf, int num) 969 { 970 if (s->handshake_func == 0) { 971 SSLerr(SSL_F_SSL_PEEK, 972 SSL_R_UNINITIALIZED); 973 return (-1); 974 } 975 976 if (s->shutdown & SSL_RECEIVED_SHUTDOWN) { 977 return (0); 978 } 979 return (s->method->ssl_peek(s, buf, num)); 980 } 981 982 int 983 SSL_write(SSL *s, const void *buf, int num) 984 { 985 if (s->handshake_func == 0) { 986 SSLerr(SSL_F_SSL_WRITE, 987 SSL_R_UNINITIALIZED); 988 return (-1); 989 } 990 991 if (s->shutdown & SSL_SENT_SHUTDOWN) { 992 s->rwstate = SSL_NOTHING; 993 SSLerr(SSL_F_SSL_WRITE, 994 SSL_R_PROTOCOL_IS_SHUTDOWN); 995 return (-1); 996 } 997 return (s->method->ssl_write(s, buf, num)); 998 } 999 1000 int 1001 SSL_shutdown(SSL *s) 1002 { 1003 /* 1004 * Note that this function behaves differently from what one might 1005 * expect. Return values are 0 for no success (yet), 1006 * 1 for success; but calling it once is usually not enough, 1007 * even if blocking I/O is used (see ssl3_shutdown). 1008 */ 1009 1010 if (s->handshake_func == 0) { 1011 SSLerr(SSL_F_SSL_SHUTDOWN, 1012 SSL_R_UNINITIALIZED); 1013 return (-1); 1014 } 1015 1016 if ((s != NULL) && !SSL_in_init(s)) 1017 return (s->method->ssl_shutdown(s)); 1018 else 1019 return (1); 1020 } 1021 1022 int 1023 SSL_renegotiate(SSL *s) 1024 { 1025 if (s->renegotiate == 0) 1026 s->renegotiate = 1; 1027 1028 s->new_session = 1; 1029 1030 return (s->method->ssl_renegotiate(s)); 1031 } 1032 1033 int 1034 SSL_renegotiate_abbreviated(SSL *s) 1035 { 1036 if (s->renegotiate == 0) 1037 s->renegotiate = 1; 1038 1039 s->new_session = 0; 1040 1041 return (s->method->ssl_renegotiate(s)); 1042 } 1043 1044 int 1045 SSL_renegotiate_pending(SSL *s) 1046 { 1047 /* 1048 * Becomes true when negotiation is requested; 1049 * false again once a handshake has finished. 1050 */ 1051 return (s->renegotiate != 0); 1052 } 1053 1054 long 1055 SSL_ctrl(SSL *s, int cmd, long larg, void *parg) 1056 { 1057 long l; 1058 1059 switch (cmd) { 1060 case SSL_CTRL_GET_READ_AHEAD: 1061 return (s->read_ahead); 1062 case SSL_CTRL_SET_READ_AHEAD: 1063 l = s->read_ahead; 1064 s->read_ahead = larg; 1065 return (l); 1066 1067 case SSL_CTRL_SET_MSG_CALLBACK_ARG: 1068 s->msg_callback_arg = parg; 1069 return (1); 1070 1071 case SSL_CTRL_OPTIONS: 1072 return (s->options|=larg); 1073 case SSL_CTRL_CLEAR_OPTIONS: 1074 return (s->options&=~larg); 1075 case SSL_CTRL_MODE: 1076 return (s->mode|=larg); 1077 case SSL_CTRL_CLEAR_MODE: 1078 return (s->mode &=~larg); 1079 case SSL_CTRL_GET_MAX_CERT_LIST: 1080 return (s->max_cert_list); 1081 case SSL_CTRL_SET_MAX_CERT_LIST: 1082 l = s->max_cert_list; 1083 s->max_cert_list = larg; 1084 return (l); 1085 case SSL_CTRL_SET_MTU: 1086 #ifndef OPENSSL_NO_DTLS1 1087 if (larg < (long)dtls1_min_mtu()) 1088 return (0); 1089 #endif 1090 if (SSL_IS_DTLS(s)) { 1091 s->d1->mtu = larg; 1092 return (larg); 1093 } 1094 return (0); 1095 case SSL_CTRL_SET_MAX_SEND_FRAGMENT: 1096 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH) 1097 return (0); 1098 s->max_send_fragment = larg; 1099 return (1); 1100 case SSL_CTRL_GET_RI_SUPPORT: 1101 if (s->s3) 1102 return (s->s3->send_connection_binding); 1103 else return (0); 1104 default: 1105 return (s->method->ssl_ctrl(s, cmd, larg, parg)); 1106 } 1107 } 1108 1109 long 1110 SSL_callback_ctrl(SSL *s, int cmd, void (*fp)(void)) 1111 { 1112 switch (cmd) { 1113 case SSL_CTRL_SET_MSG_CALLBACK: 1114 s->msg_callback = (void (*)(int write_p, int version, 1115 int content_type, const void *buf, size_t len, 1116 SSL *ssl, void *arg))(fp); 1117 return (1); 1118 1119 default: 1120 return (s->method->ssl_callback_ctrl(s, cmd, fp)); 1121 } 1122 } 1123 1124 LHASH_OF(SSL_SESSION) * 1125 SSL_CTX_sessions(SSL_CTX *ctx) 1126 { 1127 return (ctx->sessions); 1128 } 1129 1130 long 1131 SSL_CTX_ctrl(SSL_CTX *ctx, int cmd, long larg, void *parg) 1132 { 1133 long l; 1134 1135 switch (cmd) { 1136 case SSL_CTRL_GET_READ_AHEAD: 1137 return (ctx->read_ahead); 1138 case SSL_CTRL_SET_READ_AHEAD: 1139 l = ctx->read_ahead; 1140 ctx->read_ahead = larg; 1141 return (l); 1142 1143 case SSL_CTRL_SET_MSG_CALLBACK_ARG: 1144 ctx->msg_callback_arg = parg; 1145 return (1); 1146 1147 case SSL_CTRL_GET_MAX_CERT_LIST: 1148 return (ctx->max_cert_list); 1149 case SSL_CTRL_SET_MAX_CERT_LIST: 1150 l = ctx->max_cert_list; 1151 ctx->max_cert_list = larg; 1152 return (l); 1153 1154 case SSL_CTRL_SET_SESS_CACHE_SIZE: 1155 l = ctx->session_cache_size; 1156 ctx->session_cache_size = larg; 1157 return (l); 1158 case SSL_CTRL_GET_SESS_CACHE_SIZE: 1159 return (ctx->session_cache_size); 1160 case SSL_CTRL_SET_SESS_CACHE_MODE: 1161 l = ctx->session_cache_mode; 1162 ctx->session_cache_mode = larg; 1163 return (l); 1164 case SSL_CTRL_GET_SESS_CACHE_MODE: 1165 return (ctx->session_cache_mode); 1166 1167 case SSL_CTRL_SESS_NUMBER: 1168 return (lh_SSL_SESSION_num_items(ctx->sessions)); 1169 case SSL_CTRL_SESS_CONNECT: 1170 return (ctx->stats.sess_connect); 1171 case SSL_CTRL_SESS_CONNECT_GOOD: 1172 return (ctx->stats.sess_connect_good); 1173 case SSL_CTRL_SESS_CONNECT_RENEGOTIATE: 1174 return (ctx->stats.sess_connect_renegotiate); 1175 case SSL_CTRL_SESS_ACCEPT: 1176 return (ctx->stats.sess_accept); 1177 case SSL_CTRL_SESS_ACCEPT_GOOD: 1178 return (ctx->stats.sess_accept_good); 1179 case SSL_CTRL_SESS_ACCEPT_RENEGOTIATE: 1180 return (ctx->stats.sess_accept_renegotiate); 1181 case SSL_CTRL_SESS_HIT: 1182 return (ctx->stats.sess_hit); 1183 case SSL_CTRL_SESS_CB_HIT: 1184 return (ctx->stats.sess_cb_hit); 1185 case SSL_CTRL_SESS_MISSES: 1186 return (ctx->stats.sess_miss); 1187 case SSL_CTRL_SESS_TIMEOUTS: 1188 return (ctx->stats.sess_timeout); 1189 case SSL_CTRL_SESS_CACHE_FULL: 1190 return (ctx->stats.sess_cache_full); 1191 case SSL_CTRL_OPTIONS: 1192 return (ctx->options|=larg); 1193 case SSL_CTRL_CLEAR_OPTIONS: 1194 return (ctx->options&=~larg); 1195 case SSL_CTRL_MODE: 1196 return (ctx->mode|=larg); 1197 case SSL_CTRL_CLEAR_MODE: 1198 return (ctx->mode&=~larg); 1199 case SSL_CTRL_SET_MAX_SEND_FRAGMENT: 1200 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH) 1201 return (0); 1202 ctx->max_send_fragment = larg; 1203 return (1); 1204 default: 1205 return (ctx->method->ssl_ctx_ctrl(ctx, cmd, larg, parg)); 1206 } 1207 } 1208 1209 long 1210 SSL_CTX_callback_ctrl(SSL_CTX *ctx, int cmd, void (*fp)(void)) 1211 { 1212 switch (cmd) { 1213 case SSL_CTRL_SET_MSG_CALLBACK: 1214 ctx->msg_callback = (void (*)(int write_p, int version, 1215 int content_type, const void *buf, size_t len, SSL *ssl, 1216 void *arg))(fp); 1217 return (1); 1218 1219 default: 1220 return (ctx->method->ssl_ctx_callback_ctrl(ctx, cmd, fp)); 1221 } 1222 } 1223 1224 int 1225 ssl_cipher_id_cmp(const SSL_CIPHER *a, const SSL_CIPHER *b) 1226 { 1227 long l; 1228 1229 l = a->id - b->id; 1230 if (l == 0L) 1231 return (0); 1232 else 1233 return ((l > 0) ? 1:-1); 1234 } 1235 1236 int 1237 ssl_cipher_ptr_id_cmp(const SSL_CIPHER * const *ap, 1238 const SSL_CIPHER * const *bp) 1239 { 1240 long l; 1241 1242 l = (*ap)->id - (*bp)->id; 1243 if (l == 0L) 1244 return (0); 1245 else 1246 return ((l > 0) ? 1:-1); 1247 } 1248 1249 /* 1250 * Return a STACK of the ciphers available for the SSL and in order of 1251 * preference. 1252 */ 1253 STACK_OF(SSL_CIPHER) * 1254 SSL_get_ciphers(const SSL *s) 1255 { 1256 if (s != NULL) { 1257 if (s->cipher_list != NULL) { 1258 return (s->cipher_list); 1259 } else if ((s->ctx != NULL) && (s->ctx->cipher_list != NULL)) { 1260 return (s->ctx->cipher_list); 1261 } 1262 } 1263 return (NULL); 1264 } 1265 1266 /* 1267 * Return a STACK of the ciphers available for the SSL and in order of 1268 * algorithm id. 1269 */ 1270 STACK_OF(SSL_CIPHER) * 1271 ssl_get_ciphers_by_id(SSL *s) 1272 { 1273 if (s != NULL) { 1274 if (s->cipher_list_by_id != NULL) { 1275 return (s->cipher_list_by_id); 1276 } else if ((s->ctx != NULL) && 1277 (s->ctx->cipher_list_by_id != NULL)) { 1278 return (s->ctx->cipher_list_by_id); 1279 } 1280 } 1281 return (NULL); 1282 } 1283 1284 /* The old interface to get the same thing as SSL_get_ciphers(). */ 1285 const char * 1286 SSL_get_cipher_list(const SSL *s, int n) 1287 { 1288 SSL_CIPHER *c; 1289 STACK_OF(SSL_CIPHER) *sk; 1290 1291 if (s == NULL) 1292 return (NULL); 1293 sk = SSL_get_ciphers(s); 1294 if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= n)) 1295 return (NULL); 1296 c = sk_SSL_CIPHER_value(sk, n); 1297 if (c == NULL) 1298 return (NULL); 1299 return (c->name); 1300 } 1301 1302 /* Specify the ciphers to be used by default by the SSL_CTX. */ 1303 int 1304 SSL_CTX_set_cipher_list(SSL_CTX *ctx, const char *str) 1305 { 1306 STACK_OF(SSL_CIPHER) *sk; 1307 1308 sk = ssl_create_cipher_list(ctx->method, &ctx->cipher_list, 1309 &ctx->cipher_list_by_id, str); 1310 /* 1311 * ssl_create_cipher_list may return an empty stack if it 1312 * was unable to find a cipher matching the given rule string 1313 * (for example if the rule string specifies a cipher which 1314 * has been disabled). This is not an error as far as 1315 * ssl_create_cipher_list is concerned, and hence 1316 * ctx->cipher_list and ctx->cipher_list_by_id has been 1317 * updated. 1318 */ 1319 if (sk == NULL) 1320 return (0); 1321 else if (sk_SSL_CIPHER_num(sk) == 0) { 1322 SSLerr(SSL_F_SSL_CTX_SET_CIPHER_LIST, 1323 SSL_R_NO_CIPHER_MATCH); 1324 return (0); 1325 } 1326 return (1); 1327 } 1328 1329 /* Specify the ciphers to be used by the SSL. */ 1330 int 1331 SSL_set_cipher_list(SSL *s, const char *str) 1332 { 1333 STACK_OF(SSL_CIPHER) *sk; 1334 1335 sk = ssl_create_cipher_list(s->ctx->method, &s->cipher_list, 1336 &s->cipher_list_by_id, str); 1337 /* see comment in SSL_CTX_set_cipher_list */ 1338 if (sk == NULL) 1339 return (0); 1340 else if (sk_SSL_CIPHER_num(sk) == 0) { 1341 SSLerr(SSL_F_SSL_SET_CIPHER_LIST, 1342 SSL_R_NO_CIPHER_MATCH); 1343 return (0); 1344 } 1345 return (1); 1346 } 1347 1348 /* works well for SSLv2, not so good for SSLv3 */ 1349 char * 1350 SSL_get_shared_ciphers(const SSL *s, char *buf, int len) 1351 { 1352 char *end; 1353 STACK_OF(SSL_CIPHER) *sk; 1354 SSL_CIPHER *c; 1355 size_t curlen = 0; 1356 int i; 1357 1358 if (s->session == NULL || s->session->ciphers == NULL || len < 2) 1359 return (NULL); 1360 1361 sk = s->session->ciphers; 1362 if (sk_SSL_CIPHER_num(sk) == 0) 1363 return (NULL); 1364 1365 buf[0] = '\0'; 1366 for (i = 0; i < sk_SSL_CIPHER_num(sk); i++) { 1367 c = sk_SSL_CIPHER_value(sk, i); 1368 end = buf + curlen; 1369 if (strlcat(buf, c->name, len) >= len || 1370 (curlen = strlcat(buf, ":", len)) >= len) { 1371 /* remove truncated cipher from list */ 1372 *end = '\0'; 1373 break; 1374 } 1375 } 1376 /* remove trailing colon */ 1377 if ((end = strrchr(buf, ':')) != NULL) 1378 *end = '\0'; 1379 return (buf); 1380 } 1381 1382 int 1383 ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk, unsigned char *p) 1384 { 1385 int i; 1386 SSL_CIPHER *c; 1387 unsigned char *q; 1388 1389 if (sk == NULL) 1390 return (0); 1391 q = p; 1392 1393 for (i = 0; i < sk_SSL_CIPHER_num(sk); i++) { 1394 c = sk_SSL_CIPHER_value(sk, i); 1395 1396 /* Skip TLS v1.2 only ciphersuites if lower than v1.2 */ 1397 if ((c->algorithm_ssl & SSL_TLSV1_2) && 1398 (TLS1_get_client_version(s) < TLS1_2_VERSION)) 1399 continue; 1400 1401 s2n(ssl3_cipher_get_value(c), p); 1402 } 1403 1404 /* 1405 * If p == q, no ciphers and caller indicates an error. Otherwise 1406 * add SCSV if not renegotiating. 1407 */ 1408 if (p != q && !s->renegotiate) 1409 s2n(SSL3_CK_SCSV & SSL3_CK_VALUE_MASK, p); 1410 1411 return (p - q); 1412 } 1413 1414 STACK_OF(SSL_CIPHER) * 1415 ssl_bytes_to_cipher_list(SSL *s, const unsigned char *p, int num) 1416 { 1417 CBS cbs; 1418 const SSL_CIPHER *c; 1419 STACK_OF(SSL_CIPHER) *sk = NULL; 1420 unsigned long cipher_id; 1421 uint16_t cipher_value, max_version; 1422 1423 if (s->s3) 1424 s->s3->send_connection_binding = 0; 1425 1426 /* 1427 * RFC 5246 section 7.4.1.2 defines the interval as [2,2^16-2]. 1428 */ 1429 if (num < 2 || num > 0x10000 - 2) { 1430 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST, 1431 SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST); 1432 return (NULL); 1433 } 1434 1435 if ((sk = sk_SSL_CIPHER_new_null()) == NULL) { 1436 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST, ERR_R_MALLOC_FAILURE); 1437 goto err; 1438 } 1439 1440 CBS_init(&cbs, p, num); 1441 while (CBS_len(&cbs) > 0) { 1442 if (!CBS_get_u16(&cbs, &cipher_value)) { 1443 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST, 1444 SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST); 1445 goto err; 1446 } 1447 1448 cipher_id = SSL3_CK_ID | cipher_value; 1449 1450 if (s->s3 != NULL && cipher_id == SSL3_CK_SCSV) { 1451 /* 1452 * TLS_EMPTY_RENEGOTIATION_INFO_SCSV is fatal if 1453 * renegotiating. 1454 */ 1455 if (s->renegotiate) { 1456 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST, 1457 SSL_R_SCSV_RECEIVED_WHEN_RENEGOTIATING); 1458 ssl3_send_alert(s, SSL3_AL_FATAL, 1459 SSL_AD_HANDSHAKE_FAILURE); 1460 1461 goto err; 1462 } 1463 s->s3->send_connection_binding = 1; 1464 continue; 1465 } 1466 1467 if (cipher_id == SSL3_CK_FALLBACK_SCSV) { 1468 /* 1469 * TLS_FALLBACK_SCSV indicates that the client 1470 * previously tried a higher protocol version. 1471 * Fail if the current version is an unexpected 1472 * downgrade. 1473 */ 1474 max_version = ssl_max_server_version(s); 1475 if (max_version == 0 || s->version < max_version) { 1476 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST, 1477 SSL_R_INAPPROPRIATE_FALLBACK); 1478 if (s->s3 != NULL) 1479 ssl3_send_alert(s, SSL3_AL_FATAL, 1480 SSL_AD_INAPPROPRIATE_FALLBACK); 1481 goto err; 1482 } 1483 continue; 1484 } 1485 1486 if ((c = ssl3_get_cipher_by_value(cipher_value)) != NULL) { 1487 if (!sk_SSL_CIPHER_push(sk, c)) { 1488 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST, 1489 ERR_R_MALLOC_FAILURE); 1490 goto err; 1491 } 1492 } 1493 } 1494 1495 return (sk); 1496 1497 err: 1498 sk_SSL_CIPHER_free(sk); 1499 1500 return (NULL); 1501 } 1502 1503 1504 /* 1505 * Return a servername extension value if provided in Client Hello, or NULL. 1506 * So far, only host_name types are defined (RFC 3546). 1507 */ 1508 const char * 1509 SSL_get_servername(const SSL *s, const int type) 1510 { 1511 if (type != TLSEXT_NAMETYPE_host_name) 1512 return (NULL); 1513 1514 return (s->session && !s->tlsext_hostname ? 1515 s->session->tlsext_hostname : 1516 s->tlsext_hostname); 1517 } 1518 1519 int 1520 SSL_get_servername_type(const SSL *s) 1521 { 1522 if (s->session && 1523 (!s->tlsext_hostname ? 1524 s->session->tlsext_hostname : s->tlsext_hostname)) 1525 return (TLSEXT_NAMETYPE_host_name); 1526 return (-1); 1527 } 1528 1529 /* 1530 * SSL_select_next_proto implements the standard protocol selection. It is 1531 * expected that this function is called from the callback set by 1532 * SSL_CTX_set_next_proto_select_cb. 1533 * 1534 * The protocol data is assumed to be a vector of 8-bit, length prefixed byte 1535 * strings. The length byte itself is not included in the length. A byte 1536 * string of length 0 is invalid. No byte string may be truncated. 1537 * 1538 * The current, but experimental algorithm for selecting the protocol is: 1539 * 1540 * 1) If the server doesn't support NPN then this is indicated to the 1541 * callback. In this case, the client application has to abort the connection 1542 * or have a default application level protocol. 1543 * 1544 * 2) If the server supports NPN, but advertises an empty list then the 1545 * client selects the first protcol in its list, but indicates via the 1546 * API that this fallback case was enacted. 1547 * 1548 * 3) Otherwise, the client finds the first protocol in the server's list 1549 * that it supports and selects this protocol. This is because it's 1550 * assumed that the server has better information about which protocol 1551 * a client should use. 1552 * 1553 * 4) If the client doesn't support any of the server's advertised 1554 * protocols, then this is treated the same as case 2. 1555 * 1556 * It returns either 1557 * OPENSSL_NPN_NEGOTIATED if a common protocol was found, or 1558 * OPENSSL_NPN_NO_OVERLAP if the fallback case was reached. 1559 */ 1560 int 1561 SSL_select_next_proto(unsigned char **out, unsigned char *outlen, 1562 const unsigned char *server, unsigned int server_len, 1563 const unsigned char *client, unsigned int client_len) 1564 { 1565 unsigned int i, j; 1566 const unsigned char *result; 1567 int status = OPENSSL_NPN_UNSUPPORTED; 1568 1569 /* 1570 * For each protocol in server preference order, 1571 * see if we support it. 1572 */ 1573 for (i = 0; i < server_len; ) { 1574 for (j = 0; j < client_len; ) { 1575 if (server[i] == client[j] && 1576 memcmp(&server[i + 1], 1577 &client[j + 1], server[i]) == 0) { 1578 /* We found a match */ 1579 result = &server[i]; 1580 status = OPENSSL_NPN_NEGOTIATED; 1581 goto found; 1582 } 1583 j += client[j]; 1584 j++; 1585 } 1586 i += server[i]; 1587 i++; 1588 } 1589 1590 /* There's no overlap between our protocols and the server's list. */ 1591 result = client; 1592 status = OPENSSL_NPN_NO_OVERLAP; 1593 1594 found: 1595 *out = (unsigned char *) result + 1; 1596 *outlen = result[0]; 1597 return (status); 1598 } 1599 1600 /* 1601 * SSL_get0_next_proto_negotiated sets *data and *len to point to the client's 1602 * requested protocol for this connection and returns 0. If the client didn't 1603 * request any protocol, then *data is set to NULL. 1604 * 1605 * Note that the client can request any protocol it chooses. The value returned 1606 * from this function need not be a member of the list of supported protocols 1607 * provided by the callback. 1608 */ 1609 void 1610 SSL_get0_next_proto_negotiated(const SSL *s, const unsigned char **data, 1611 unsigned *len) 1612 { 1613 *data = s->next_proto_negotiated; 1614 if (!*data) { 1615 *len = 0; 1616 } else { 1617 *len = s->next_proto_negotiated_len; 1618 } 1619 } 1620 1621 /* 1622 * SSL_CTX_set_next_protos_advertised_cb sets a callback that is called when a 1623 * TLS server needs a list of supported protocols for Next Protocol 1624 * Negotiation. The returned list must be in wire format. The list is returned 1625 * by setting |out| to point to it and |outlen| to its length. This memory will 1626 * not be modified, but one should assume that the SSL* keeps a reference to 1627 * it. 1628 * 1629 * The callback should return SSL_TLSEXT_ERR_OK if it wishes to advertise. 1630 * Otherwise, no such extension will be included in the ServerHello. 1631 */ 1632 void 1633 SSL_CTX_set_next_protos_advertised_cb(SSL_CTX *ctx, int (*cb) (SSL *ssl, 1634 const unsigned char **out, unsigned int *outlen, void *arg), void *arg) 1635 { 1636 ctx->next_protos_advertised_cb = cb; 1637 ctx->next_protos_advertised_cb_arg = arg; 1638 } 1639 1640 /* 1641 * SSL_CTX_set_next_proto_select_cb sets a callback that is called when a 1642 * client needs to select a protocol from the server's provided list. |out| 1643 * must be set to point to the selected protocol (which may be within |in|). 1644 * The length of the protocol name must be written into |outlen|. The server's 1645 * advertised protocols are provided in |in| and |inlen|. The callback can 1646 * assume that |in| is syntactically valid. 1647 * 1648 * The client must select a protocol. It is fatal to the connection if this 1649 * callback returns a value other than SSL_TLSEXT_ERR_OK. 1650 */ 1651 void 1652 SSL_CTX_set_next_proto_select_cb(SSL_CTX *ctx, int (*cb) (SSL *s, 1653 unsigned char **out, unsigned char *outlen, const unsigned char *in, 1654 unsigned int inlen, void *arg), void *arg) 1655 { 1656 ctx->next_proto_select_cb = cb; 1657 ctx->next_proto_select_cb_arg = arg; 1658 } 1659 1660 /* 1661 * SSL_CTX_set_alpn_protos sets the ALPN protocol list to the specified 1662 * protocols, which must be in wire-format (i.e. a series of non-empty, 1663 * 8-bit length-prefixed strings). Returns 0 on success. 1664 */ 1665 int 1666 SSL_CTX_set_alpn_protos(SSL_CTX *ctx, const unsigned char *protos, 1667 unsigned int protos_len) 1668 { 1669 free(ctx->alpn_client_proto_list); 1670 if ((ctx->alpn_client_proto_list = malloc(protos_len)) == NULL) 1671 return (1); 1672 memcpy(ctx->alpn_client_proto_list, protos, protos_len); 1673 ctx->alpn_client_proto_list_len = protos_len; 1674 1675 return (0); 1676 } 1677 1678 /* 1679 * SSL_set_alpn_protos sets the ALPN protocol list to the specified 1680 * protocols, which must be in wire-format (i.e. a series of non-empty, 1681 * 8-bit length-prefixed strings). Returns 0 on success. 1682 */ 1683 int 1684 SSL_set_alpn_protos(SSL *ssl, const unsigned char* protos, 1685 unsigned int protos_len) 1686 { 1687 free(ssl->alpn_client_proto_list); 1688 if ((ssl->alpn_client_proto_list = malloc(protos_len)) == NULL) 1689 return (1); 1690 memcpy(ssl->alpn_client_proto_list, protos, protos_len); 1691 ssl->alpn_client_proto_list_len = protos_len; 1692 1693 return (0); 1694 } 1695 1696 /* 1697 * SSL_CTX_set_alpn_select_cb sets a callback function that is called during 1698 * ClientHello processing in order to select an ALPN protocol from the 1699 * client's list of offered protocols. 1700 */ 1701 void 1702 SSL_CTX_set_alpn_select_cb(SSL_CTX* ctx, 1703 int (*cb) (SSL *ssl, const unsigned char **out, unsigned char *outlen, 1704 const unsigned char *in, unsigned int inlen, void *arg), void *arg) 1705 { 1706 ctx->alpn_select_cb = cb; 1707 ctx->alpn_select_cb_arg = arg; 1708 } 1709 1710 /* 1711 * SSL_get0_alpn_selected gets the selected ALPN protocol (if any). On return 1712 * it sets data to point to len bytes of protocol name (not including the 1713 * leading length-prefix byte). If the server didn't respond with* a negotiated 1714 * protocol then len will be zero. 1715 */ 1716 void 1717 SSL_get0_alpn_selected(const SSL *ssl, const unsigned char **data, 1718 unsigned *len) 1719 { 1720 *data = NULL; 1721 *len = 0; 1722 1723 if (ssl->s3 != NULL) { 1724 *data = ssl->s3->alpn_selected; 1725 *len = ssl->s3->alpn_selected_len; 1726 } 1727 } 1728 1729 int 1730 SSL_export_keying_material(SSL *s, unsigned char *out, size_t olen, 1731 const char *label, size_t llen, const unsigned char *p, size_t plen, 1732 int use_context) 1733 { 1734 if (s->version < TLS1_VERSION) 1735 return (-1); 1736 1737 return (s->method->ssl3_enc->export_keying_material(s, out, olen, 1738 label, llen, p, plen, use_context)); 1739 } 1740 1741 static unsigned long 1742 ssl_session_hash(const SSL_SESSION *a) 1743 { 1744 unsigned long l; 1745 1746 l = (unsigned long) 1747 ((unsigned int) a->session_id[0] )| 1748 ((unsigned int) a->session_id[1]<< 8L)| 1749 ((unsigned long)a->session_id[2]<<16L)| 1750 ((unsigned long)a->session_id[3]<<24L); 1751 return (l); 1752 } 1753 1754 /* 1755 * NB: If this function (or indeed the hash function which uses a sort of 1756 * coarser function than this one) is changed, ensure 1757 * SSL_CTX_has_matching_session_id() is checked accordingly. It relies on being 1758 * able to construct an SSL_SESSION that will collide with any existing session 1759 * with a matching session ID. 1760 */ 1761 static int 1762 ssl_session_cmp(const SSL_SESSION *a, const SSL_SESSION *b) 1763 { 1764 if (a->ssl_version != b->ssl_version) 1765 return (1); 1766 if (a->session_id_length != b->session_id_length) 1767 return (1); 1768 if (timingsafe_memcmp(a->session_id, b->session_id, a->session_id_length) != 0) 1769 return (1); 1770 return (0); 1771 } 1772 1773 /* 1774 * These wrapper functions should remain rather than redeclaring 1775 * SSL_SESSION_hash and SSL_SESSION_cmp for void* types and casting each 1776 * variable. The reason is that the functions aren't static, they're exposed via 1777 * ssl.h. 1778 */ 1779 static 1780 IMPLEMENT_LHASH_HASH_FN(ssl_session, SSL_SESSION) 1781 static 1782 IMPLEMENT_LHASH_COMP_FN(ssl_session, SSL_SESSION) 1783 1784 SSL_CTX * 1785 SSL_CTX_new(const SSL_METHOD *meth) 1786 { 1787 SSL_CTX *ret = NULL; 1788 1789 if (meth == NULL) { 1790 SSLerr(SSL_F_SSL_CTX_NEW, 1791 SSL_R_NULL_SSL_METHOD_PASSED); 1792 return (NULL); 1793 } 1794 1795 if (SSL_get_ex_data_X509_STORE_CTX_idx() < 0) { 1796 SSLerr(SSL_F_SSL_CTX_NEW, 1797 SSL_R_X509_VERIFICATION_SETUP_PROBLEMS); 1798 goto err; 1799 } 1800 ret = calloc(1, sizeof(SSL_CTX)); 1801 if (ret == NULL) 1802 goto err; 1803 1804 ret->method = meth; 1805 1806 ret->cert_store = NULL; 1807 ret->session_cache_mode = SSL_SESS_CACHE_SERVER; 1808 ret->session_cache_size = SSL_SESSION_CACHE_MAX_SIZE_DEFAULT; 1809 ret->session_cache_head = NULL; 1810 ret->session_cache_tail = NULL; 1811 1812 /* We take the system default */ 1813 ret->session_timeout = meth->get_timeout(); 1814 1815 ret->new_session_cb = 0; 1816 ret->remove_session_cb = 0; 1817 ret->get_session_cb = 0; 1818 ret->generate_session_id = 0; 1819 1820 memset((char *)&ret->stats, 0, sizeof(ret->stats)); 1821 1822 ret->references = 1; 1823 ret->quiet_shutdown = 0; 1824 1825 ret->info_callback = NULL; 1826 1827 ret->app_verify_callback = 0; 1828 ret->app_verify_arg = NULL; 1829 1830 ret->max_cert_list = SSL_MAX_CERT_LIST_DEFAULT; 1831 ret->read_ahead = 0; 1832 ret->msg_callback = 0; 1833 ret->msg_callback_arg = NULL; 1834 ret->verify_mode = SSL_VERIFY_NONE; 1835 ret->sid_ctx_length = 0; 1836 ret->default_verify_callback = NULL; 1837 if ((ret->cert = ssl_cert_new()) == NULL) 1838 goto err; 1839 1840 ret->default_passwd_callback = 0; 1841 ret->default_passwd_callback_userdata = NULL; 1842 ret->client_cert_cb = 0; 1843 ret->app_gen_cookie_cb = 0; 1844 ret->app_verify_cookie_cb = 0; 1845 1846 ret->sessions = lh_SSL_SESSION_new(); 1847 if (ret->sessions == NULL) 1848 goto err; 1849 ret->cert_store = X509_STORE_new(); 1850 if (ret->cert_store == NULL) 1851 goto err; 1852 1853 ssl_create_cipher_list(ret->method, &ret->cipher_list, 1854 &ret->cipher_list_by_id, SSL_DEFAULT_CIPHER_LIST); 1855 if (ret->cipher_list == NULL || 1856 sk_SSL_CIPHER_num(ret->cipher_list) <= 0) { 1857 SSLerr(SSL_F_SSL_CTX_NEW, 1858 SSL_R_LIBRARY_HAS_NO_CIPHERS); 1859 goto err2; 1860 } 1861 1862 ret->param = X509_VERIFY_PARAM_new(); 1863 if (!ret->param) 1864 goto err; 1865 1866 if ((ret->md5 = EVP_get_digestbyname("ssl3-md5")) == NULL) { 1867 SSLerr(SSL_F_SSL_CTX_NEW, 1868 SSL_R_UNABLE_TO_LOAD_SSL3_MD5_ROUTINES); 1869 goto err2; 1870 } 1871 if ((ret->sha1 = EVP_get_digestbyname("ssl3-sha1")) == NULL) { 1872 SSLerr(SSL_F_SSL_CTX_NEW, 1873 SSL_R_UNABLE_TO_LOAD_SSL3_SHA1_ROUTINES); 1874 goto err2; 1875 } 1876 1877 if ((ret->client_CA = sk_X509_NAME_new_null()) == NULL) 1878 goto err; 1879 1880 CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_CTX, ret, &ret->ex_data); 1881 1882 ret->extra_certs = NULL; 1883 1884 ret->max_send_fragment = SSL3_RT_MAX_PLAIN_LENGTH; 1885 1886 ret->tlsext_servername_callback = 0; 1887 ret->tlsext_servername_arg = NULL; 1888 1889 /* Setup RFC4507 ticket keys */ 1890 arc4random_buf(ret->tlsext_tick_key_name, 16); 1891 arc4random_buf(ret->tlsext_tick_hmac_key, 16); 1892 arc4random_buf(ret->tlsext_tick_aes_key, 16); 1893 1894 ret->tlsext_status_cb = 0; 1895 ret->tlsext_status_arg = NULL; 1896 1897 ret->next_protos_advertised_cb = 0; 1898 ret->next_proto_select_cb = 0; 1899 #ifndef OPENSSL_NO_ENGINE 1900 ret->client_cert_engine = NULL; 1901 #ifdef OPENSSL_SSL_CLIENT_ENGINE_AUTO 1902 #define eng_strx(x) #x 1903 #define eng_str(x) eng_strx(x) 1904 /* Use specific client engine automatically... ignore errors */ 1905 { 1906 ENGINE *eng; 1907 eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO)); 1908 if (!eng) { 1909 ERR_clear_error(); 1910 ENGINE_load_builtin_engines(); 1911 eng = ENGINE_by_id(eng_str( 1912 OPENSSL_SSL_CLIENT_ENGINE_AUTO)); 1913 } 1914 if (!eng || !SSL_CTX_set_client_cert_engine(ret, eng)) 1915 ERR_clear_error(); 1916 } 1917 #endif 1918 #endif 1919 /* 1920 * Default is to connect to non-RI servers. When RI is more widely 1921 * deployed might change this. 1922 */ 1923 ret->options |= SSL_OP_LEGACY_SERVER_CONNECT; 1924 1925 /* Disable SSLv3 by default. */ 1926 ret->options |= SSL_OP_NO_SSLv3; 1927 1928 return (ret); 1929 err: 1930 SSLerr(SSL_F_SSL_CTX_NEW, 1931 ERR_R_MALLOC_FAILURE); 1932 err2: 1933 SSL_CTX_free(ret); 1934 return (NULL); 1935 } 1936 1937 void 1938 SSL_CTX_free(SSL_CTX *a) 1939 { 1940 int i; 1941 1942 if (a == NULL) 1943 return; 1944 1945 i = CRYPTO_add(&a->references, -1, CRYPTO_LOCK_SSL_CTX); 1946 if (i > 0) 1947 return; 1948 1949 if (a->param) 1950 X509_VERIFY_PARAM_free(a->param); 1951 1952 /* 1953 * Free internal session cache. However: the remove_cb() may reference 1954 * the ex_data of SSL_CTX, thus the ex_data store can only be removed 1955 * after the sessions were flushed. 1956 * As the ex_data handling routines might also touch the session cache, 1957 * the most secure solution seems to be: empty (flush) the cache, then 1958 * free ex_data, then finally free the cache. 1959 * (See ticket [openssl.org #212].) 1960 */ 1961 if (a->sessions != NULL) 1962 SSL_CTX_flush_sessions(a, 0); 1963 1964 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_CTX, a, &a->ex_data); 1965 1966 if (a->sessions != NULL) 1967 lh_SSL_SESSION_free(a->sessions); 1968 1969 if (a->cert_store != NULL) 1970 X509_STORE_free(a->cert_store); 1971 if (a->cipher_list != NULL) 1972 sk_SSL_CIPHER_free(a->cipher_list); 1973 if (a->cipher_list_by_id != NULL) 1974 sk_SSL_CIPHER_free(a->cipher_list_by_id); 1975 if (a->cert != NULL) 1976 ssl_cert_free(a->cert); 1977 if (a->client_CA != NULL) 1978 sk_X509_NAME_pop_free(a->client_CA, X509_NAME_free); 1979 if (a->extra_certs != NULL) 1980 sk_X509_pop_free(a->extra_certs, X509_free); 1981 1982 #ifndef OPENSSL_NO_SRTP 1983 if (a->srtp_profiles) 1984 sk_SRTP_PROTECTION_PROFILE_free(a->srtp_profiles); 1985 #endif 1986 1987 #ifndef OPENSSL_NO_ENGINE 1988 if (a->client_cert_engine) 1989 ENGINE_finish(a->client_cert_engine); 1990 #endif 1991 1992 free(a->alpn_client_proto_list); 1993 1994 free(a); 1995 } 1996 1997 void 1998 SSL_CTX_set_default_passwd_cb(SSL_CTX *ctx, pem_password_cb *cb) 1999 { 2000 ctx->default_passwd_callback = cb; 2001 } 2002 2003 void 2004 SSL_CTX_set_default_passwd_cb_userdata(SSL_CTX *ctx, void *u) 2005 { 2006 ctx->default_passwd_callback_userdata = u; 2007 } 2008 2009 void 2010 SSL_CTX_set_cert_verify_callback(SSL_CTX *ctx, int (*cb)(X509_STORE_CTX *, 2011 void *), void *arg) 2012 { 2013 ctx->app_verify_callback = cb; 2014 ctx->app_verify_arg = arg; 2015 } 2016 2017 void 2018 SSL_CTX_set_verify(SSL_CTX *ctx, int mode, int (*cb)(int, X509_STORE_CTX *)) 2019 { 2020 ctx->verify_mode = mode; 2021 ctx->default_verify_callback = cb; 2022 } 2023 2024 void 2025 SSL_CTX_set_verify_depth(SSL_CTX *ctx, int depth) 2026 { 2027 X509_VERIFY_PARAM_set_depth(ctx->param, depth); 2028 } 2029 2030 void 2031 ssl_set_cert_masks(CERT *c, const SSL_CIPHER *cipher) 2032 { 2033 CERT_PKEY *cpk; 2034 int rsa_enc, rsa_sign, dh_tmp, dsa_sign; 2035 unsigned long mask_k, mask_a; 2036 int have_ecc_cert, ecdh_ok, ecdsa_ok; 2037 int have_ecdh_tmp; 2038 X509 *x = NULL; 2039 EVP_PKEY *ecc_pkey = NULL; 2040 int signature_nid = 0, pk_nid = 0, md_nid = 0; 2041 2042 if (c == NULL) 2043 return; 2044 2045 dh_tmp = (c->dh_tmp != NULL || c->dh_tmp_cb != NULL || 2046 c->dh_tmp_auto != 0); 2047 2048 have_ecdh_tmp = (c->ecdh_tmp != NULL || c->ecdh_tmp_cb != NULL || 2049 c->ecdh_tmp_auto != 0); 2050 cpk = &(c->pkeys[SSL_PKEY_RSA_ENC]); 2051 rsa_enc = (cpk->x509 != NULL && cpk->privatekey != NULL); 2052 cpk = &(c->pkeys[SSL_PKEY_RSA_SIGN]); 2053 rsa_sign = (cpk->x509 != NULL && cpk->privatekey != NULL); 2054 cpk = &(c->pkeys[SSL_PKEY_DSA_SIGN]); 2055 dsa_sign = (cpk->x509 != NULL && cpk->privatekey != NULL); 2056 /* FIX THIS EAY EAY EAY */ 2057 cpk = &(c->pkeys[SSL_PKEY_ECC]); 2058 have_ecc_cert = (cpk->x509 != NULL && cpk->privatekey != NULL); 2059 mask_k = 0; 2060 mask_a = 0; 2061 2062 cpk = &(c->pkeys[SSL_PKEY_GOST01]); 2063 if (cpk->x509 != NULL && cpk->privatekey !=NULL) { 2064 mask_k |= SSL_kGOST; 2065 mask_a |= SSL_aGOST01; 2066 } 2067 2068 if (rsa_enc) 2069 mask_k|=SSL_kRSA; 2070 2071 if (dh_tmp) 2072 mask_k|=SSL_kDHE; 2073 2074 if (rsa_enc || rsa_sign) 2075 mask_a|=SSL_aRSA; 2076 2077 if (dsa_sign) 2078 mask_a|=SSL_aDSS; 2079 2080 mask_a|=SSL_aNULL; 2081 2082 /* 2083 * An ECC certificate may be usable for ECDH and/or 2084 * ECDSA cipher suites depending on the key usage extension. 2085 */ 2086 if (have_ecc_cert) { 2087 /* This call populates extension flags (ex_flags) */ 2088 x = (c->pkeys[SSL_PKEY_ECC]).x509; 2089 X509_check_purpose(x, -1, 0); 2090 ecdh_ok = (x->ex_flags & EXFLAG_KUSAGE) ? 2091 (x->ex_kusage & X509v3_KU_KEY_AGREEMENT) : 1; 2092 ecdsa_ok = (x->ex_flags & EXFLAG_KUSAGE) ? 2093 (x->ex_kusage & X509v3_KU_DIGITAL_SIGNATURE) : 1; 2094 ecc_pkey = X509_get_pubkey(x); 2095 EVP_PKEY_free(ecc_pkey); 2096 if ((x->sig_alg) && (x->sig_alg->algorithm)) { 2097 signature_nid = OBJ_obj2nid(x->sig_alg->algorithm); 2098 OBJ_find_sigid_algs(signature_nid, &md_nid, &pk_nid); 2099 } 2100 if (ecdh_ok) { 2101 if (pk_nid == NID_rsaEncryption || pk_nid == NID_rsa) { 2102 mask_k|=SSL_kECDHr; 2103 mask_a|=SSL_aECDH; 2104 } 2105 if (pk_nid == NID_X9_62_id_ecPublicKey) { 2106 mask_k|=SSL_kECDHe; 2107 mask_a|=SSL_aECDH; 2108 } 2109 } 2110 if (ecdsa_ok) 2111 mask_a|=SSL_aECDSA; 2112 } 2113 2114 if (have_ecdh_tmp) { 2115 mask_k|=SSL_kECDHE; 2116 } 2117 2118 2119 c->mask_k = mask_k; 2120 c->mask_a = mask_a; 2121 c->valid = 1; 2122 } 2123 2124 /* This handy macro borrowed from crypto/x509v3/v3_purp.c */ 2125 #define ku_reject(x, usage) \ 2126 (((x)->ex_flags & EXFLAG_KUSAGE) && !((x)->ex_kusage & (usage))) 2127 2128 2129 int 2130 ssl_check_srvr_ecc_cert_and_alg(X509 *x, SSL *s) 2131 { 2132 unsigned long alg_k, alg_a; 2133 int signature_nid = 0, md_nid = 0, pk_nid = 0; 2134 const SSL_CIPHER *cs = s->s3->tmp.new_cipher; 2135 2136 alg_k = cs->algorithm_mkey; 2137 alg_a = cs->algorithm_auth; 2138 2139 /* This call populates the ex_flags field correctly */ 2140 X509_check_purpose(x, -1, 0); 2141 if ((x->sig_alg) && (x->sig_alg->algorithm)) { 2142 signature_nid = OBJ_obj2nid(x->sig_alg->algorithm); 2143 OBJ_find_sigid_algs(signature_nid, &md_nid, &pk_nid); 2144 } 2145 if (alg_k & SSL_kECDHe || alg_k & SSL_kECDHr) { 2146 /* key usage, if present, must allow key agreement */ 2147 if (ku_reject(x, X509v3_KU_KEY_AGREEMENT)) { 2148 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, 2149 SSL_R_ECC_CERT_NOT_FOR_KEY_AGREEMENT); 2150 return (0); 2151 } 2152 if ((alg_k & SSL_kECDHe) && TLS1_get_version(s) < 2153 TLS1_2_VERSION) { 2154 /* signature alg must be ECDSA */ 2155 if (pk_nid != NID_X9_62_id_ecPublicKey) { 2156 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, 2157 SSL_R_ECC_CERT_SHOULD_HAVE_SHA1_SIGNATURE); 2158 return (0); 2159 } 2160 } 2161 if ((alg_k & SSL_kECDHr) && TLS1_get_version(s) < 2162 TLS1_2_VERSION) { 2163 /* signature alg must be RSA */ 2164 if (pk_nid != NID_rsaEncryption && pk_nid != NID_rsa) { 2165 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, 2166 SSL_R_ECC_CERT_SHOULD_HAVE_RSA_SIGNATURE); 2167 return (0); 2168 } 2169 } 2170 } 2171 if (alg_a & SSL_aECDSA) { 2172 /* key usage, if present, must allow signing */ 2173 if (ku_reject(x, X509v3_KU_DIGITAL_SIGNATURE)) { 2174 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, 2175 SSL_R_ECC_CERT_NOT_FOR_SIGNING); 2176 return (0); 2177 } 2178 } 2179 2180 return (1); 2181 /* all checks are ok */ 2182 } 2183 2184 2185 /* THIS NEEDS CLEANING UP */ 2186 CERT_PKEY * 2187 ssl_get_server_send_pkey(const SSL *s) 2188 { 2189 unsigned long alg_k, alg_a; 2190 CERT *c; 2191 int i; 2192 2193 c = s->cert; 2194 ssl_set_cert_masks(c, s->s3->tmp.new_cipher); 2195 2196 alg_k = s->s3->tmp.new_cipher->algorithm_mkey; 2197 alg_a = s->s3->tmp.new_cipher->algorithm_auth; 2198 2199 if (alg_k & (SSL_kECDHr|SSL_kECDHe)) { 2200 /* 2201 * We don't need to look at SSL_kECDHE 2202 * since no certificate is needed for 2203 * anon ECDH and for authenticated 2204 * ECDHE, the check for the auth 2205 * algorithm will set i correctly 2206 * NOTE: For ECDH-RSA, we need an ECC 2207 * not an RSA cert but for EECDH-RSA 2208 * we need an RSA cert. Placing the 2209 * checks for SSL_kECDH before RSA 2210 * checks ensures the correct cert is chosen. 2211 */ 2212 i = SSL_PKEY_ECC; 2213 } else if (alg_a & SSL_aECDSA) { 2214 i = SSL_PKEY_ECC; 2215 } else if (alg_a & SSL_aDSS) { 2216 i = SSL_PKEY_DSA_SIGN; 2217 } else if (alg_a & SSL_aRSA) { 2218 if (c->pkeys[SSL_PKEY_RSA_ENC].x509 == NULL) 2219 i = SSL_PKEY_RSA_SIGN; 2220 else 2221 i = SSL_PKEY_RSA_ENC; 2222 } else if (alg_a & SSL_aGOST01) { 2223 i = SSL_PKEY_GOST01; 2224 } else { /* if (alg_a & SSL_aNULL) */ 2225 SSLerr(SSL_F_SSL_GET_SERVER_SEND_PKEY, ERR_R_INTERNAL_ERROR); 2226 return (NULL); 2227 } 2228 2229 return (c->pkeys + i); 2230 } 2231 2232 X509 * 2233 ssl_get_server_send_cert(const SSL *s) 2234 { 2235 CERT_PKEY *cpk; 2236 2237 cpk = ssl_get_server_send_pkey(s); 2238 if (!cpk) 2239 return (NULL); 2240 return (cpk->x509); 2241 } 2242 2243 EVP_PKEY * 2244 ssl_get_sign_pkey(SSL *s, const SSL_CIPHER *cipher, const EVP_MD **pmd) 2245 { 2246 unsigned long alg_a; 2247 CERT *c; 2248 int idx = -1; 2249 2250 alg_a = cipher->algorithm_auth; 2251 c = s->cert; 2252 2253 if ((alg_a & SSL_aDSS) && 2254 (c->pkeys[SSL_PKEY_DSA_SIGN].privatekey != NULL)) 2255 idx = SSL_PKEY_DSA_SIGN; 2256 else if (alg_a & SSL_aRSA) { 2257 if (c->pkeys[SSL_PKEY_RSA_SIGN].privatekey != NULL) 2258 idx = SSL_PKEY_RSA_SIGN; 2259 else if (c->pkeys[SSL_PKEY_RSA_ENC].privatekey != NULL) 2260 idx = SSL_PKEY_RSA_ENC; 2261 } else if ((alg_a & SSL_aECDSA) && 2262 (c->pkeys[SSL_PKEY_ECC].privatekey != NULL)) 2263 idx = SSL_PKEY_ECC; 2264 if (idx == -1) { 2265 SSLerr(SSL_F_SSL_GET_SIGN_PKEY, ERR_R_INTERNAL_ERROR); 2266 return (NULL); 2267 } 2268 if (pmd) 2269 *pmd = c->pkeys[idx].digest; 2270 return (c->pkeys[idx].privatekey); 2271 } 2272 2273 DH * 2274 ssl_get_auto_dh(SSL *s) 2275 { 2276 CERT_PKEY *cpk; 2277 int keylen; 2278 DH *dhp; 2279 2280 if (s->cert->dh_tmp_auto == 2) { 2281 keylen = 1024; 2282 } else if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) { 2283 keylen = 1024; 2284 if (s->s3->tmp.new_cipher->strength_bits == 256) 2285 keylen = 3072; 2286 } else { 2287 if ((cpk = ssl_get_server_send_pkey(s)) == NULL) 2288 return (NULL); 2289 if (cpk->privatekey == NULL || cpk->privatekey->pkey.dh == NULL) 2290 return (NULL); 2291 keylen = EVP_PKEY_bits(cpk->privatekey); 2292 } 2293 2294 if ((dhp = DH_new()) == NULL) 2295 return (NULL); 2296 2297 dhp->g = BN_new(); 2298 if (dhp->g != NULL) 2299 BN_set_word(dhp->g, 2); 2300 2301 if (keylen >= 8192) 2302 dhp->p = get_rfc3526_prime_8192(NULL); 2303 else if (keylen >= 4096) 2304 dhp->p = get_rfc3526_prime_4096(NULL); 2305 else if (keylen >= 3072) 2306 dhp->p = get_rfc3526_prime_3072(NULL); 2307 else if (keylen >= 2048) 2308 dhp->p = get_rfc3526_prime_2048(NULL); 2309 else if (keylen >= 1536) 2310 dhp->p = get_rfc3526_prime_1536(NULL); 2311 else 2312 dhp->p = get_rfc2409_prime_1024(NULL); 2313 2314 if (dhp->p == NULL || dhp->g == NULL) { 2315 DH_free(dhp); 2316 return (NULL); 2317 } 2318 return (dhp); 2319 } 2320 2321 void 2322 ssl_update_cache(SSL *s, int mode) 2323 { 2324 int i; 2325 2326 /* 2327 * If the session_id_length is 0, we are not supposed to cache it, 2328 * and it would be rather hard to do anyway :-) 2329 */ 2330 if (s->session->session_id_length == 0) 2331 return; 2332 2333 i = s->session_ctx->session_cache_mode; 2334 if ((i & mode) && (!s->hit) && ((i & SSL_SESS_CACHE_NO_INTERNAL_STORE) 2335 || SSL_CTX_add_session(s->session_ctx, s->session)) 2336 && (s->session_ctx->new_session_cb != NULL)) { 2337 CRYPTO_add(&s->session->references, 1, CRYPTO_LOCK_SSL_SESSION); 2338 if (!s->session_ctx->new_session_cb(s, s->session)) 2339 SSL_SESSION_free(s->session); 2340 } 2341 2342 /* auto flush every 255 connections */ 2343 if ((!(i & SSL_SESS_CACHE_NO_AUTO_CLEAR)) && 2344 ((i & mode) == mode)) { 2345 if ((((mode & SSL_SESS_CACHE_CLIENT) ? 2346 s->session_ctx->stats.sess_connect_good : 2347 s->session_ctx->stats.sess_accept_good) & 0xff) == 0xff) { 2348 SSL_CTX_flush_sessions(s->session_ctx, time(NULL)); 2349 } 2350 } 2351 } 2352 2353 const SSL_METHOD * 2354 SSL_get_ssl_method(SSL *s) 2355 { 2356 return (s->method); 2357 } 2358 2359 int 2360 SSL_set_ssl_method(SSL *s, const SSL_METHOD *meth) 2361 { 2362 int conn = -1; 2363 int ret = 1; 2364 2365 if (s->method != meth) { 2366 if (s->handshake_func != NULL) 2367 conn = (s->handshake_func == s->method->ssl_connect); 2368 2369 if (s->method->version == meth->version) 2370 s->method = meth; 2371 else { 2372 s->method->ssl_free(s); 2373 s->method = meth; 2374 ret = s->method->ssl_new(s); 2375 } 2376 2377 if (conn == 1) 2378 s->handshake_func = meth->ssl_connect; 2379 else if (conn == 0) 2380 s->handshake_func = meth->ssl_accept; 2381 } 2382 return (ret); 2383 } 2384 2385 int 2386 SSL_get_error(const SSL *s, int i) 2387 { 2388 int reason; 2389 unsigned long l; 2390 BIO *bio; 2391 2392 if (i > 0) 2393 return (SSL_ERROR_NONE); 2394 2395 /* Make things return SSL_ERROR_SYSCALL when doing SSL_do_handshake 2396 * etc, where we do encode the error */ 2397 if ((l = ERR_peek_error()) != 0) { 2398 if (ERR_GET_LIB(l) == ERR_LIB_SYS) 2399 return (SSL_ERROR_SYSCALL); 2400 else 2401 return (SSL_ERROR_SSL); 2402 } 2403 2404 if ((i < 0) && SSL_want_read(s)) { 2405 bio = SSL_get_rbio(s); 2406 if (BIO_should_read(bio)) { 2407 return (SSL_ERROR_WANT_READ); 2408 } else if (BIO_should_write(bio)) { 2409 /* 2410 * This one doesn't make too much sense... We never 2411 * try to write to the rbio, and an application 2412 * program where rbio and wbio are separate couldn't 2413 * even know what it should wait for. However if we 2414 * ever set s->rwstate incorrectly (so that we have 2415 * SSL_want_read(s) instead of SSL_want_write(s)) 2416 * and rbio and wbio *are* the same, this test works 2417 * around that bug; so it might be safer to keep it. 2418 */ 2419 return (SSL_ERROR_WANT_WRITE); 2420 } else if (BIO_should_io_special(bio)) { 2421 reason = BIO_get_retry_reason(bio); 2422 if (reason == BIO_RR_CONNECT) 2423 return (SSL_ERROR_WANT_CONNECT); 2424 else if (reason == BIO_RR_ACCEPT) 2425 return (SSL_ERROR_WANT_ACCEPT); 2426 else 2427 return (SSL_ERROR_SYSCALL); /* unknown */ 2428 } 2429 } 2430 2431 if ((i < 0) && SSL_want_write(s)) { 2432 bio = SSL_get_wbio(s); 2433 if (BIO_should_write(bio)) { 2434 return (SSL_ERROR_WANT_WRITE); 2435 } else if (BIO_should_read(bio)) { 2436 /* 2437 * See above (SSL_want_read(s) with 2438 * BIO_should_write(bio)) 2439 */ 2440 return (SSL_ERROR_WANT_READ); 2441 } else if (BIO_should_io_special(bio)) { 2442 reason = BIO_get_retry_reason(bio); 2443 if (reason == BIO_RR_CONNECT) 2444 return (SSL_ERROR_WANT_CONNECT); 2445 else if (reason == BIO_RR_ACCEPT) 2446 return (SSL_ERROR_WANT_ACCEPT); 2447 else 2448 return (SSL_ERROR_SYSCALL); 2449 } 2450 } 2451 if ((i < 0) && SSL_want_x509_lookup(s)) { 2452 return (SSL_ERROR_WANT_X509_LOOKUP); 2453 } 2454 2455 if (i == 0) { 2456 if ((s->shutdown & SSL_RECEIVED_SHUTDOWN) && 2457 (s->s3->warn_alert == SSL_AD_CLOSE_NOTIFY)) 2458 return (SSL_ERROR_ZERO_RETURN); 2459 } 2460 return (SSL_ERROR_SYSCALL); 2461 } 2462 2463 int 2464 SSL_do_handshake(SSL *s) 2465 { 2466 int ret = 1; 2467 2468 if (s->handshake_func == NULL) { 2469 SSLerr(SSL_F_SSL_DO_HANDSHAKE, 2470 SSL_R_CONNECTION_TYPE_NOT_SET); 2471 return (-1); 2472 } 2473 2474 s->method->ssl_renegotiate_check(s); 2475 2476 if (SSL_in_init(s) || SSL_in_before(s)) { 2477 ret = s->handshake_func(s); 2478 } 2479 return (ret); 2480 } 2481 2482 /* 2483 * For the next 2 functions, SSL_clear() sets shutdown and so 2484 * one of these calls will reset it 2485 */ 2486 void 2487 SSL_set_accept_state(SSL *s) 2488 { 2489 s->server = 1; 2490 s->shutdown = 0; 2491 s->state = SSL_ST_ACCEPT|SSL_ST_BEFORE; 2492 s->handshake_func = s->method->ssl_accept; 2493 /* clear the current cipher */ 2494 ssl_clear_cipher_ctx(s); 2495 ssl_clear_hash_ctx(&s->read_hash); 2496 ssl_clear_hash_ctx(&s->write_hash); 2497 } 2498 2499 void 2500 SSL_set_connect_state(SSL *s) 2501 { 2502 s->server = 0; 2503 s->shutdown = 0; 2504 s->state = SSL_ST_CONNECT|SSL_ST_BEFORE; 2505 s->handshake_func = s->method->ssl_connect; 2506 /* clear the current cipher */ 2507 ssl_clear_cipher_ctx(s); 2508 ssl_clear_hash_ctx(&s->read_hash); 2509 ssl_clear_hash_ctx(&s->write_hash); 2510 } 2511 2512 int 2513 ssl_undefined_function(SSL *s) 2514 { 2515 SSLerr(SSL_F_SSL_UNDEFINED_FUNCTION, 2516 ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); 2517 return (0); 2518 } 2519 2520 int 2521 ssl_undefined_void_function(void) 2522 { 2523 SSLerr(SSL_F_SSL_UNDEFINED_VOID_FUNCTION, 2524 ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); 2525 return (0); 2526 } 2527 2528 int 2529 ssl_undefined_const_function(const SSL *s) 2530 { 2531 SSLerr(SSL_F_SSL_UNDEFINED_CONST_FUNCTION, 2532 ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); 2533 return (0); 2534 } 2535 2536 SSL_METHOD * 2537 ssl_bad_method(int ver) 2538 { 2539 SSLerr(SSL_F_SSL_BAD_METHOD, 2540 ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); 2541 return (NULL); 2542 } 2543 2544 const char * 2545 ssl_version_string(int ver) 2546 { 2547 switch (ver) { 2548 case DTLS1_BAD_VER: 2549 return (SSL_TXT_DTLS1_BAD); 2550 case DTLS1_VERSION: 2551 return (SSL_TXT_DTLS1); 2552 case TLS1_VERSION: 2553 return (SSL_TXT_TLSV1); 2554 case TLS1_1_VERSION: 2555 return (SSL_TXT_TLSV1_1); 2556 case TLS1_2_VERSION: 2557 return (SSL_TXT_TLSV1_2); 2558 default: 2559 return ("unknown"); 2560 } 2561 } 2562 2563 const char * 2564 SSL_get_version(const SSL *s) 2565 { 2566 return ssl_version_string(s->version); 2567 } 2568 2569 uint16_t 2570 ssl_max_server_version(SSL *s) 2571 { 2572 uint16_t max_version; 2573 2574 /* 2575 * The SSL method will be changed during version negotiation, as such 2576 * we want to use the SSL method from the context. 2577 */ 2578 max_version = s->ctx->method->version; 2579 2580 if (SSL_IS_DTLS(s)) 2581 return (DTLS1_VERSION); 2582 2583 if ((s->options & SSL_OP_NO_TLSv1_2) == 0 && 2584 max_version >= TLS1_2_VERSION) 2585 return (TLS1_2_VERSION); 2586 if ((s->options & SSL_OP_NO_TLSv1_1) == 0 && 2587 max_version >= TLS1_1_VERSION) 2588 return (TLS1_1_VERSION); 2589 if ((s->options & SSL_OP_NO_TLSv1) == 0 && 2590 max_version >= TLS1_VERSION) 2591 return (TLS1_VERSION); 2592 2593 return (0); 2594 } 2595 2596 SSL * 2597 SSL_dup(SSL *s) 2598 { 2599 STACK_OF(X509_NAME) *sk; 2600 X509_NAME *xn; 2601 SSL *ret; 2602 int i; 2603 2604 if ((ret = SSL_new(SSL_get_SSL_CTX(s))) == NULL) 2605 return (NULL); 2606 2607 ret->version = s->version; 2608 ret->type = s->type; 2609 ret->method = s->method; 2610 2611 if (s->session != NULL) { 2612 /* This copies session-id, SSL_METHOD, sid_ctx, and 'cert' */ 2613 SSL_copy_session_id(ret, s); 2614 } else { 2615 /* 2616 * No session has been established yet, so we have to expect 2617 * that s->cert or ret->cert will be changed later -- 2618 * they should not both point to the same object, 2619 * and thus we can't use SSL_copy_session_id. 2620 */ 2621 2622 ret->method->ssl_free(ret); 2623 ret->method = s->method; 2624 ret->method->ssl_new(ret); 2625 2626 if (s->cert != NULL) { 2627 if (ret->cert != NULL) { 2628 ssl_cert_free(ret->cert); 2629 } 2630 ret->cert = ssl_cert_dup(s->cert); 2631 if (ret->cert == NULL) 2632 goto err; 2633 } 2634 2635 SSL_set_session_id_context(ret, 2636 s->sid_ctx, s->sid_ctx_length); 2637 } 2638 2639 ret->options = s->options; 2640 ret->mode = s->mode; 2641 SSL_set_max_cert_list(ret, SSL_get_max_cert_list(s)); 2642 SSL_set_read_ahead(ret, SSL_get_read_ahead(s)); 2643 ret->msg_callback = s->msg_callback; 2644 ret->msg_callback_arg = s->msg_callback_arg; 2645 SSL_set_verify(ret, SSL_get_verify_mode(s), 2646 SSL_get_verify_callback(s)); 2647 SSL_set_verify_depth(ret, SSL_get_verify_depth(s)); 2648 ret->generate_session_id = s->generate_session_id; 2649 2650 SSL_set_info_callback(ret, SSL_get_info_callback(s)); 2651 2652 ret->debug = s->debug; 2653 2654 /* copy app data, a little dangerous perhaps */ 2655 if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_SSL, 2656 &ret->ex_data, &s->ex_data)) 2657 goto err; 2658 2659 /* setup rbio, and wbio */ 2660 if (s->rbio != NULL) { 2661 if (!BIO_dup_state(s->rbio,(char *)&ret->rbio)) 2662 goto err; 2663 } 2664 if (s->wbio != NULL) { 2665 if (s->wbio != s->rbio) { 2666 if (!BIO_dup_state(s->wbio,(char *)&ret->wbio)) 2667 goto err; 2668 } else 2669 ret->wbio = ret->rbio; 2670 } 2671 ret->rwstate = s->rwstate; 2672 ret->in_handshake = s->in_handshake; 2673 ret->handshake_func = s->handshake_func; 2674 ret->server = s->server; 2675 ret->renegotiate = s->renegotiate; 2676 ret->new_session = s->new_session; 2677 ret->quiet_shutdown = s->quiet_shutdown; 2678 ret->shutdown = s->shutdown; 2679 /* SSL_dup does not really work at any state, though */ 2680 ret->state=s->state; 2681 ret->rstate = s->rstate; 2682 2683 /* 2684 * Would have to copy ret->init_buf, ret->init_msg, ret->init_num, 2685 * ret->init_off 2686 */ 2687 ret->init_num = 0; 2688 2689 ret->hit = s->hit; 2690 2691 X509_VERIFY_PARAM_inherit(ret->param, s->param); 2692 2693 /* dup the cipher_list and cipher_list_by_id stacks */ 2694 if (s->cipher_list != NULL) { 2695 if ((ret->cipher_list = 2696 sk_SSL_CIPHER_dup(s->cipher_list)) == NULL) 2697 goto err; 2698 } 2699 if (s->cipher_list_by_id != NULL) { 2700 if ((ret->cipher_list_by_id = 2701 sk_SSL_CIPHER_dup(s->cipher_list_by_id)) == NULL) 2702 goto err; 2703 } 2704 2705 /* Dup the client_CA list */ 2706 if (s->client_CA != NULL) { 2707 if ((sk = sk_X509_NAME_dup(s->client_CA)) == NULL) goto err; 2708 ret->client_CA = sk; 2709 for (i = 0; i < sk_X509_NAME_num(sk); i++) { 2710 xn = sk_X509_NAME_value(sk, i); 2711 if (sk_X509_NAME_set(sk, i, 2712 X509_NAME_dup(xn)) == NULL) { 2713 X509_NAME_free(xn); 2714 goto err; 2715 } 2716 } 2717 } 2718 2719 if (0) { 2720 err: 2721 if (ret != NULL) 2722 SSL_free(ret); 2723 ret = NULL; 2724 } 2725 return (ret); 2726 } 2727 2728 void 2729 ssl_clear_cipher_ctx(SSL *s) 2730 { 2731 EVP_CIPHER_CTX_free(s->enc_read_ctx); 2732 s->enc_read_ctx = NULL; 2733 EVP_CIPHER_CTX_free(s->enc_write_ctx); 2734 s->enc_write_ctx = NULL; 2735 2736 if (s->aead_read_ctx != NULL) { 2737 EVP_AEAD_CTX_cleanup(&s->aead_read_ctx->ctx); 2738 free(s->aead_read_ctx); 2739 s->aead_read_ctx = NULL; 2740 } 2741 if (s->aead_write_ctx != NULL) { 2742 EVP_AEAD_CTX_cleanup(&s->aead_write_ctx->ctx); 2743 free(s->aead_write_ctx); 2744 s->aead_write_ctx = NULL; 2745 } 2746 2747 } 2748 2749 /* Fix this function so that it takes an optional type parameter */ 2750 X509 * 2751 SSL_get_certificate(const SSL *s) 2752 { 2753 if (s->cert != NULL) 2754 return (s->cert->key->x509); 2755 else 2756 return (NULL); 2757 } 2758 2759 /* Fix this function so that it takes an optional type parameter */ 2760 EVP_PKEY * 2761 SSL_get_privatekey(SSL *s) 2762 { 2763 if (s->cert != NULL) 2764 return (s->cert->key->privatekey); 2765 else 2766 return (NULL); 2767 } 2768 2769 const SSL_CIPHER * 2770 SSL_get_current_cipher(const SSL *s) 2771 { 2772 if ((s->session != NULL) && (s->session->cipher != NULL)) 2773 return (s->session->cipher); 2774 return (NULL); 2775 } 2776 const void * 2777 SSL_get_current_compression(SSL *s) 2778 { 2779 return (NULL); 2780 } 2781 2782 const void * 2783 SSL_get_current_expansion(SSL *s) 2784 { 2785 return (NULL); 2786 } 2787 2788 int 2789 ssl_init_wbio_buffer(SSL *s, int push) 2790 { 2791 BIO *bbio; 2792 2793 if (s->bbio == NULL) { 2794 bbio = BIO_new(BIO_f_buffer()); 2795 if (bbio == NULL) 2796 return (0); 2797 s->bbio = bbio; 2798 } else { 2799 bbio = s->bbio; 2800 if (s->bbio == s->wbio) 2801 s->wbio = BIO_pop(s->wbio); 2802 } 2803 (void)BIO_reset(bbio); 2804 /* if (!BIO_set_write_buffer_size(bbio,16*1024)) */ 2805 if (!BIO_set_read_buffer_size(bbio, 1)) { 2806 SSLerr(SSL_F_SSL_INIT_WBIO_BUFFER, 2807 ERR_R_BUF_LIB); 2808 return (0); 2809 } 2810 if (push) { 2811 if (s->wbio != bbio) 2812 s->wbio = BIO_push(bbio, s->wbio); 2813 } else { 2814 if (s->wbio == bbio) 2815 s->wbio = BIO_pop(bbio); 2816 } 2817 return (1); 2818 } 2819 2820 void 2821 ssl_free_wbio_buffer(SSL *s) 2822 { 2823 if (s == NULL) 2824 return; 2825 2826 if (s->bbio == NULL) 2827 return; 2828 2829 if (s->bbio == s->wbio) { 2830 /* remove buffering */ 2831 s->wbio = BIO_pop(s->wbio); 2832 } 2833 BIO_free(s->bbio); 2834 s->bbio = NULL; 2835 } 2836 2837 void 2838 SSL_CTX_set_quiet_shutdown(SSL_CTX *ctx, int mode) 2839 { 2840 ctx->quiet_shutdown = mode; 2841 } 2842 2843 int 2844 SSL_CTX_get_quiet_shutdown(const SSL_CTX *ctx) 2845 { 2846 return (ctx->quiet_shutdown); 2847 } 2848 2849 void 2850 SSL_set_quiet_shutdown(SSL *s, int mode) 2851 { 2852 s->quiet_shutdown = mode; 2853 } 2854 2855 int 2856 SSL_get_quiet_shutdown(const SSL *s) 2857 { 2858 return (s->quiet_shutdown); 2859 } 2860 2861 void 2862 SSL_set_shutdown(SSL *s, int mode) 2863 { 2864 s->shutdown = mode; 2865 } 2866 2867 int 2868 SSL_get_shutdown(const SSL *s) 2869 { 2870 return (s->shutdown); 2871 } 2872 2873 int 2874 SSL_version(const SSL *s) 2875 { 2876 return (s->version); 2877 } 2878 2879 SSL_CTX * 2880 SSL_get_SSL_CTX(const SSL *ssl) 2881 { 2882 return (ssl->ctx); 2883 } 2884 2885 SSL_CTX * 2886 SSL_set_SSL_CTX(SSL *ssl, SSL_CTX* ctx) 2887 { 2888 if (ssl->ctx == ctx) 2889 return (ssl->ctx); 2890 if (ctx == NULL) 2891 ctx = ssl->initial_ctx; 2892 if (ssl->cert != NULL) 2893 ssl_cert_free(ssl->cert); 2894 ssl->cert = ssl_cert_dup(ctx->cert); 2895 CRYPTO_add(&ctx->references, 1, CRYPTO_LOCK_SSL_CTX); 2896 SSL_CTX_free(ssl->ctx); /* decrement reference count */ 2897 ssl->ctx = ctx; 2898 return (ssl->ctx); 2899 } 2900 2901 int 2902 SSL_CTX_set_default_verify_paths(SSL_CTX *ctx) 2903 { 2904 return (X509_STORE_set_default_paths(ctx->cert_store)); 2905 } 2906 2907 int 2908 SSL_CTX_load_verify_locations(SSL_CTX *ctx, const char *CAfile, 2909 const char *CApath) 2910 { 2911 return (X509_STORE_load_locations(ctx->cert_store, CAfile, CApath)); 2912 } 2913 2914 int 2915 SSL_CTX_load_verify_mem(SSL_CTX *ctx, void *buf, int len) 2916 { 2917 return (X509_STORE_load_mem(ctx->cert_store, buf, len)); 2918 } 2919 2920 void 2921 SSL_set_info_callback(SSL *ssl, void (*cb)(const SSL *ssl, int type, int val)) 2922 { 2923 ssl->info_callback = cb; 2924 } 2925 2926 void (*SSL_get_info_callback(const SSL *ssl))(const SSL *ssl, int type, int val) 2927 { 2928 return (ssl->info_callback); 2929 } 2930 2931 int 2932 SSL_state(const SSL *ssl) 2933 { 2934 return (ssl->state); 2935 } 2936 2937 void 2938 SSL_set_state(SSL *ssl, int state) 2939 { 2940 ssl->state = state; 2941 } 2942 2943 void 2944 SSL_set_verify_result(SSL *ssl, long arg) 2945 { 2946 ssl->verify_result = arg; 2947 } 2948 2949 long 2950 SSL_get_verify_result(const SSL *ssl) 2951 { 2952 return (ssl->verify_result); 2953 } 2954 2955 int 2956 SSL_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func, 2957 CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func) 2958 { 2959 return (CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL, argl, argp, 2960 new_func, dup_func, free_func)); 2961 } 2962 2963 int 2964 SSL_set_ex_data(SSL *s, int idx, void *arg) 2965 { 2966 return (CRYPTO_set_ex_data(&s->ex_data, idx, arg)); 2967 } 2968 2969 void * 2970 SSL_get_ex_data(const SSL *s, int idx) 2971 { 2972 return (CRYPTO_get_ex_data(&s->ex_data, idx)); 2973 } 2974 2975 int 2976 SSL_CTX_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func, 2977 CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func) 2978 { 2979 return (CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL_CTX, argl, argp, 2980 new_func, dup_func, free_func)); 2981 } 2982 2983 int 2984 SSL_CTX_set_ex_data(SSL_CTX *s, int idx, void *arg) 2985 { 2986 return (CRYPTO_set_ex_data(&s->ex_data, idx, arg)); 2987 } 2988 2989 void * 2990 SSL_CTX_get_ex_data(const SSL_CTX *s, int idx) 2991 { 2992 return (CRYPTO_get_ex_data(&s->ex_data, idx)); 2993 } 2994 2995 int 2996 ssl_ok(SSL *s) 2997 { 2998 return (1); 2999 } 3000 3001 X509_STORE * 3002 SSL_CTX_get_cert_store(const SSL_CTX *ctx) 3003 { 3004 return (ctx->cert_store); 3005 } 3006 3007 void 3008 SSL_CTX_set_cert_store(SSL_CTX *ctx, X509_STORE *store) 3009 { 3010 if (ctx->cert_store != NULL) 3011 X509_STORE_free(ctx->cert_store); 3012 ctx->cert_store = store; 3013 } 3014 3015 int 3016 SSL_want(const SSL *s) 3017 { 3018 return (s->rwstate); 3019 } 3020 3021 void 3022 SSL_CTX_set_tmp_rsa_callback(SSL_CTX *ctx, RSA *(*cb)(SSL *ssl, int is_export, 3023 int keylength)) 3024 { 3025 SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb); 3026 } 3027 3028 void 3029 SSL_set_tmp_rsa_callback(SSL *ssl, RSA *(*cb)(SSL *ssl, int is_export, 3030 int keylength)) 3031 { 3032 SSL_callback_ctrl(ssl, SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb); 3033 } 3034 3035 void 3036 SSL_CTX_set_tmp_dh_callback(SSL_CTX *ctx, DH *(*dh)(SSL *ssl, int is_export, 3037 int keylength)) 3038 { 3039 SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh); 3040 } 3041 3042 void 3043 SSL_set_tmp_dh_callback(SSL *ssl, DH *(*dh)(SSL *ssl, int is_export, 3044 int keylength)) 3045 { 3046 SSL_callback_ctrl(ssl, SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh); 3047 } 3048 3049 void 3050 SSL_CTX_set_tmp_ecdh_callback(SSL_CTX *ctx, EC_KEY *(*ecdh)(SSL *ssl, 3051 int is_export, int keylength)) 3052 { 3053 SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_TMP_ECDH_CB, 3054 (void (*)(void))ecdh); 3055 } 3056 3057 void 3058 SSL_set_tmp_ecdh_callback(SSL *ssl, EC_KEY *(*ecdh)(SSL *ssl, int is_export, 3059 int keylength)) 3060 { 3061 SSL_callback_ctrl(ssl, SSL_CTRL_SET_TMP_ECDH_CB,(void (*)(void))ecdh); 3062 } 3063 3064 3065 void 3066 SSL_CTX_set_msg_callback(SSL_CTX *ctx, void (*cb)(int write_p, int version, 3067 int content_type, const void *buf, size_t len, SSL *ssl, void *arg)) 3068 { 3069 SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_MSG_CALLBACK, 3070 (void (*)(void))cb); 3071 } 3072 3073 void 3074 SSL_set_msg_callback(SSL *ssl, void (*cb)(int write_p, int version, 3075 int content_type, const void *buf, size_t len, SSL *ssl, void *arg)) 3076 { 3077 SSL_callback_ctrl(ssl, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb); 3078 } 3079 3080 /* 3081 * Allocates new EVP_MD_CTX and sets pointer to it into given pointer 3082 * variable, freeing EVP_MD_CTX previously stored in that variable, if 3083 * any. If EVP_MD pointer is passed, initializes ctx with this md 3084 * Returns newly allocated ctx; 3085 */ 3086 EVP_MD_CTX * 3087 ssl_replace_hash(EVP_MD_CTX **hash, const EVP_MD *md) 3088 { 3089 ssl_clear_hash_ctx(hash); 3090 *hash = EVP_MD_CTX_create(); 3091 if (*hash != NULL && md != NULL) { 3092 if (!EVP_DigestInit_ex(*hash, md, NULL)) { 3093 ssl_clear_hash_ctx(hash); 3094 return (NULL); 3095 } 3096 } 3097 return (*hash); 3098 } 3099 3100 void 3101 ssl_clear_hash_ctx(EVP_MD_CTX **hash) 3102 { 3103 if (*hash) 3104 EVP_MD_CTX_destroy(*hash); 3105 *hash = NULL; 3106 } 3107 3108 void 3109 SSL_set_debug(SSL *s, int debug) 3110 { 3111 s->debug = debug; 3112 } 3113 3114 int 3115 SSL_cache_hit(SSL *s) 3116 { 3117 return (s->hit); 3118 } 3119 3120 IMPLEMENT_OBJ_BSEARCH_GLOBAL_CMP_FN(SSL_CIPHER, SSL_CIPHER, ssl_cipher_id); 3121