ssl_lib.c revision 1.147
1/* $OpenBSD: ssl_lib.c,v 1.147 2017/01/24 14:57:31 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#include "bytestring.h" 159 160const char *SSL_version_str = OPENSSL_VERSION_TEXT; 161 162SSL3_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 189int 190SSL_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->internal->hit = 0; 204 s->internal->shutdown = 0; 205 206 if (s->internal->renegotiate) { 207 SSLerr(SSL_F_SSL_CLEAR, ERR_R_INTERNAL_ERROR); 208 return (0); 209 } 210 211 s->internal->type = 0; 212 213 s->internal->state = SSL_ST_BEFORE|((s->server) ? SSL_ST_ACCEPT : SSL_ST_CONNECT); 214 215 s->version = s->method->internal->version; 216 s->client_version = s->version; 217 s->internal->rwstate = SSL_NOTHING; 218 s->internal->rstate = SSL_ST_READ_HEADER; 219 220 BUF_MEM_free(s->internal->init_buf); 221 s->internal->init_buf = NULL; 222 223 ssl_clear_cipher_ctx(s); 224 ssl_clear_hash_ctx(&s->read_hash); 225 ssl_clear_hash_ctx(&s->internal->write_hash); 226 227 s->internal->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->internal->in_handshake && (s->session == NULL) && 234 (s->method != s->ctx->method)) { 235 s->method->internal->ssl_free(s); 236 s->method = s->ctx->method; 237 if (!s->method->internal->ssl_new(s)) 238 return (0); 239 } else 240 s->method->internal->ssl_clear(s); 241 242 return (1); 243} 244 245/* Used to change an SSL_CTXs default SSL method type */ 246int 247SSL_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->internal->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 263SSL * 264SSL_new(SSL_CTX *ctx) 265{ 266 SSL *s; 267 268 if (ctx == NULL) { 269 SSLerr(SSL_F_SSL_NEW, SSL_R_NULL_SSL_CTX); 270 return (NULL); 271 } 272 if (ctx->method == NULL) { 273 SSLerr(SSL_F_SSL_NEW, SSL_R_SSL_CTX_HAS_NO_DEFAULT_SSL_VERSION); 274 return (NULL); 275 } 276 277 if ((s = calloc(1, sizeof(*s))) == NULL) { 278 SSLerr(SSL_F_SSL_NEW, ERR_R_MALLOC_FAILURE); 279 return (NULL); 280 } 281 if ((s->internal = calloc(1, sizeof(*s->internal))) == NULL) { 282 free(s); 283 SSLerr(SSL_F_SSL_NEW, ERR_R_MALLOC_FAILURE); 284 return (NULL); 285 } 286 287 s->internal->options = ctx->internal->options; 288 s->internal->mode = ctx->internal->mode; 289 s->internal->max_cert_list = ctx->internal->max_cert_list; 290 291 if (ctx->internal->cert != NULL) { 292 /* 293 * Earlier library versions used to copy the pointer to 294 * the CERT, not its contents; only when setting new 295 * parameters for the per-SSL copy, ssl_cert_new would be 296 * called (and the direct reference to the per-SSL_CTX 297 * settings would be lost, but those still were indirectly 298 * accessed for various purposes, and for that reason they 299 * used to be known as s->ctx->default_cert). 300 * Now we don't look at the SSL_CTX's CERT after having 301 * duplicated it once. 302 */ 303 s->cert = ssl_cert_dup(ctx->internal->cert); 304 if (s->cert == NULL) 305 goto err; 306 } else 307 s->cert=NULL; /* Cannot really happen (see SSL_CTX_new) */ 308 309 s->internal->read_ahead = ctx->internal->read_ahead; 310 s->internal->msg_callback = ctx->internal->msg_callback; 311 s->internal->msg_callback_arg = ctx->internal->msg_callback_arg; 312 s->verify_mode = ctx->verify_mode; 313 s->sid_ctx_length = ctx->sid_ctx_length; 314 OPENSSL_assert(s->sid_ctx_length <= sizeof s->sid_ctx); 315 memcpy(&s->sid_ctx, &ctx->sid_ctx, sizeof(s->sid_ctx)); 316 s->internal->verify_callback = ctx->internal->default_verify_callback; 317 s->internal->generate_session_id = ctx->internal->generate_session_id; 318 319 s->param = X509_VERIFY_PARAM_new(); 320 if (!s->param) 321 goto err; 322 X509_VERIFY_PARAM_inherit(s->param, ctx->param); 323 s->internal->quiet_shutdown = ctx->internal->quiet_shutdown; 324 s->max_send_fragment = ctx->internal->max_send_fragment; 325 326 CRYPTO_add(&ctx->references, 1, CRYPTO_LOCK_SSL_CTX); 327 s->ctx = ctx; 328 s->internal->tlsext_debug_cb = 0; 329 s->internal->tlsext_debug_arg = NULL; 330 s->internal->tlsext_ticket_expected = 0; 331 s->tlsext_status_type = -1; 332 s->internal->tlsext_status_expected = 0; 333 s->internal->tlsext_ocsp_ids = NULL; 334 s->internal->tlsext_ocsp_exts = NULL; 335 s->internal->tlsext_ocsp_resp = NULL; 336 s->internal->tlsext_ocsp_resplen = -1; 337 CRYPTO_add(&ctx->references, 1, CRYPTO_LOCK_SSL_CTX); 338 s->initial_ctx = ctx; 339 340 if (ctx->internal->tlsext_ecpointformatlist != NULL) { 341 s->internal->tlsext_ecpointformatlist = 342 calloc(ctx->internal->tlsext_ecpointformatlist_length, 343 sizeof(ctx->internal->tlsext_ecpointformatlist[0])); 344 if (s->internal->tlsext_ecpointformatlist == NULL) 345 goto err; 346 memcpy(s->internal->tlsext_ecpointformatlist, 347 ctx->internal->tlsext_ecpointformatlist, 348 ctx->internal->tlsext_ecpointformatlist_length * 349 sizeof(ctx->internal->tlsext_ecpointformatlist[0])); 350 s->internal->tlsext_ecpointformatlist_length = 351 ctx->internal->tlsext_ecpointformatlist_length; 352 } 353 if (ctx->internal->tlsext_supportedgroups != NULL) { 354 s->internal->tlsext_supportedgroups = 355 calloc(ctx->internal->tlsext_supportedgroups_length, 356 sizeof(ctx->internal->tlsext_supportedgroups)); 357 if (s->internal->tlsext_supportedgroups == NULL) 358 goto err; 359 memcpy(s->internal->tlsext_supportedgroups, 360 ctx->internal->tlsext_supportedgroups, 361 ctx->internal->tlsext_supportedgroups_length * 362 sizeof(ctx->internal->tlsext_supportedgroups[0])); 363 s->internal->tlsext_supportedgroups_length = 364 ctx->internal->tlsext_supportedgroups_length; 365 } 366 367 s->internal->next_proto_negotiated = NULL; 368 369 if (s->ctx->internal->alpn_client_proto_list != NULL) { 370 s->internal->alpn_client_proto_list = 371 malloc(s->ctx->internal->alpn_client_proto_list_len); 372 if (s->internal->alpn_client_proto_list == NULL) 373 goto err; 374 memcpy(s->internal->alpn_client_proto_list, 375 s->ctx->internal->alpn_client_proto_list, 376 s->ctx->internal->alpn_client_proto_list_len); 377 s->internal->alpn_client_proto_list_len = 378 s->ctx->internal->alpn_client_proto_list_len; 379 } 380 381 s->verify_result = X509_V_OK; 382 383 s->method = ctx->method; 384 385 if (!s->method->internal->ssl_new(s)) 386 goto err; 387 388 s->references = 1; 389 s->server = (ctx->method->internal->ssl_accept == ssl_undefined_function) ? 0 : 1; 390 391 SSL_clear(s); 392 393 CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->internal->ex_data); 394 395 return (s); 396 397 err: 398 SSL_free(s); 399 SSLerr(SSL_F_SSL_NEW, ERR_R_MALLOC_FAILURE); 400 return (NULL); 401} 402 403int 404SSL_CTX_set_session_id_context(SSL_CTX *ctx, const unsigned char *sid_ctx, 405 unsigned int sid_ctx_len) 406{ 407 if (sid_ctx_len > sizeof ctx->sid_ctx) { 408 SSLerr(SSL_F_SSL_CTX_SET_SESSION_ID_CONTEXT, 409 SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG); 410 return (0); 411 } 412 ctx->sid_ctx_length = sid_ctx_len; 413 memcpy(ctx->sid_ctx, sid_ctx, sid_ctx_len); 414 415 return (1); 416} 417 418int 419SSL_set_session_id_context(SSL *ssl, const unsigned char *sid_ctx, 420 unsigned int sid_ctx_len) 421{ 422 if (sid_ctx_len > SSL_MAX_SID_CTX_LENGTH) { 423 SSLerr(SSL_F_SSL_SET_SESSION_ID_CONTEXT, 424 SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG); 425 return (0); 426 } 427 ssl->sid_ctx_length = sid_ctx_len; 428 memcpy(ssl->sid_ctx, sid_ctx, sid_ctx_len); 429 430 return (1); 431} 432 433int 434SSL_CTX_set_generate_session_id(SSL_CTX *ctx, GEN_SESSION_CB cb) 435{ 436 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX); 437 ctx->internal->generate_session_id = cb; 438 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX); 439 return (1); 440} 441 442int 443SSL_set_generate_session_id(SSL *ssl, GEN_SESSION_CB cb) 444{ 445 CRYPTO_w_lock(CRYPTO_LOCK_SSL); 446 ssl->internal->generate_session_id = cb; 447 CRYPTO_w_unlock(CRYPTO_LOCK_SSL); 448 return (1); 449} 450 451int 452SSL_has_matching_session_id(const SSL *ssl, const unsigned char *id, 453 unsigned int id_len) 454{ 455 /* 456 * A quick examination of SSL_SESSION_hash and SSL_SESSION_cmp 457 * shows how we can "construct" a session to give us the desired 458 * check - ie. to find if there's a session in the hash table 459 * that would conflict with any new session built out of this 460 * id/id_len and the ssl_version in use by this SSL. 461 */ 462 SSL_SESSION r, *p; 463 464 if (id_len > sizeof r.session_id) 465 return (0); 466 467 r.ssl_version = ssl->version; 468 r.session_id_length = id_len; 469 memcpy(r.session_id, id, id_len); 470 471 CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX); 472 p = lh_SSL_SESSION_retrieve(ssl->ctx->internal->sessions, &r); 473 CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX); 474 return (p != NULL); 475} 476 477int 478SSL_CTX_set_purpose(SSL_CTX *s, int purpose) 479{ 480 return (X509_VERIFY_PARAM_set_purpose(s->param, purpose)); 481} 482 483int 484SSL_set_purpose(SSL *s, int purpose) 485{ 486 return (X509_VERIFY_PARAM_set_purpose(s->param, purpose)); 487} 488 489int 490SSL_CTX_set_trust(SSL_CTX *s, int trust) 491{ 492 return (X509_VERIFY_PARAM_set_trust(s->param, trust)); 493} 494 495int 496SSL_set_trust(SSL *s, int trust) 497{ 498 return (X509_VERIFY_PARAM_set_trust(s->param, trust)); 499} 500 501int 502SSL_CTX_set1_param(SSL_CTX *ctx, X509_VERIFY_PARAM *vpm) 503{ 504 return (X509_VERIFY_PARAM_set1(ctx->param, vpm)); 505} 506 507int 508SSL_set1_param(SSL *ssl, X509_VERIFY_PARAM *vpm) 509{ 510 return (X509_VERIFY_PARAM_set1(ssl->param, vpm)); 511} 512 513void 514SSL_free(SSL *s) 515{ 516 int i; 517 518 if (s == NULL) 519 return; 520 521 i = CRYPTO_add(&s->references, -1, CRYPTO_LOCK_SSL); 522 if (i > 0) 523 return; 524 525 if (s->param) 526 X509_VERIFY_PARAM_free(s->param); 527 528 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->internal->ex_data); 529 530 if (s->bbio != NULL) { 531 /* If the buffering BIO is in place, pop it off */ 532 if (s->bbio == s->wbio) { 533 s->wbio = BIO_pop(s->wbio); 534 } 535 BIO_free(s->bbio); 536 s->bbio = NULL; 537 } 538 539 if (s->rbio != s->wbio) 540 BIO_free_all(s->rbio); 541 BIO_free_all(s->wbio); 542 543 if (s->internal->init_buf != NULL) 544 BUF_MEM_free(s->internal->init_buf); 545 546 /* add extra stuff */ 547 sk_SSL_CIPHER_free(s->cipher_list); 548 sk_SSL_CIPHER_free(s->internal->cipher_list_by_id); 549 550 /* Make the next call work :-) */ 551 if (s->session != NULL) { 552 ssl_clear_bad_session(s); 553 SSL_SESSION_free(s->session); 554 } 555 556 ssl_clear_cipher_ctx(s); 557 ssl_clear_hash_ctx(&s->read_hash); 558 ssl_clear_hash_ctx(&s->internal->write_hash); 559 560 ssl_cert_free(s->cert); 561 562 free(s->tlsext_hostname); 563 SSL_CTX_free(s->initial_ctx); 564 565 free(s->internal->tlsext_ecpointformatlist); 566 free(s->internal->tlsext_supportedgroups); 567 568 sk_X509_EXTENSION_pop_free(s->internal->tlsext_ocsp_exts, 569 X509_EXTENSION_free); 570 sk_OCSP_RESPID_pop_free(s->internal->tlsext_ocsp_ids, OCSP_RESPID_free); 571 free(s->internal->tlsext_ocsp_resp); 572 573 sk_X509_NAME_pop_free(s->internal->client_CA, X509_NAME_free); 574 575 if (s->method != NULL) 576 s->method->internal->ssl_free(s); 577 578 SSL_CTX_free(s->ctx); 579 580 free(s->internal->next_proto_negotiated); 581 free(s->internal->alpn_client_proto_list); 582 583#ifndef OPENSSL_NO_SRTP 584 if (s->internal->srtp_profiles) 585 sk_SRTP_PROTECTION_PROFILE_free(s->internal->srtp_profiles); 586#endif 587 588 free(s->internal); 589 free(s); 590} 591 592void 593SSL_set_bio(SSL *s, BIO *rbio, BIO *wbio) 594{ 595 /* If the output buffering BIO is still in place, remove it */ 596 if (s->bbio != NULL) { 597 if (s->wbio == s->bbio) { 598 s->wbio = s->wbio->next_bio; 599 s->bbio->next_bio = NULL; 600 } 601 } 602 603 if (s->rbio != rbio && s->rbio != s->wbio) 604 BIO_free_all(s->rbio); 605 if (s->wbio != wbio) 606 BIO_free_all(s->wbio); 607 s->rbio = rbio; 608 s->wbio = wbio; 609} 610 611BIO * 612SSL_get_rbio(const SSL *s) 613{ 614 return (s->rbio); 615} 616 617BIO * 618SSL_get_wbio(const SSL *s) 619{ 620 return (s->wbio); 621} 622 623int 624SSL_get_fd(const SSL *s) 625{ 626 return (SSL_get_rfd(s)); 627} 628 629int 630SSL_get_rfd(const SSL *s) 631{ 632 int ret = -1; 633 BIO *b, *r; 634 635 b = SSL_get_rbio(s); 636 r = BIO_find_type(b, BIO_TYPE_DESCRIPTOR); 637 if (r != NULL) 638 BIO_get_fd(r, &ret); 639 return (ret); 640} 641 642int 643SSL_get_wfd(const SSL *s) 644{ 645 int ret = -1; 646 BIO *b, *r; 647 648 b = SSL_get_wbio(s); 649 r = BIO_find_type(b, BIO_TYPE_DESCRIPTOR); 650 if (r != NULL) 651 BIO_get_fd(r, &ret); 652 return (ret); 653} 654 655int 656SSL_set_fd(SSL *s, int fd) 657{ 658 int ret = 0; 659 BIO *bio = NULL; 660 661 bio = BIO_new(BIO_s_socket()); 662 663 if (bio == NULL) { 664 SSLerr(SSL_F_SSL_SET_FD, ERR_R_BUF_LIB); 665 goto err; 666 } 667 BIO_set_fd(bio, fd, BIO_NOCLOSE); 668 SSL_set_bio(s, bio, bio); 669 ret = 1; 670err: 671 return (ret); 672} 673 674int 675SSL_set_wfd(SSL *s, int fd) 676{ 677 int ret = 0; 678 BIO *bio = NULL; 679 680 if ((s->rbio == NULL) || (BIO_method_type(s->rbio) != BIO_TYPE_SOCKET) 681 || ((int)BIO_get_fd(s->rbio, NULL) != fd)) { 682 bio = BIO_new(BIO_s_socket()); 683 684 if (bio == NULL) { 685 SSLerr(SSL_F_SSL_SET_WFD, ERR_R_BUF_LIB); 686 goto err; 687 } 688 BIO_set_fd(bio, fd, BIO_NOCLOSE); 689 SSL_set_bio(s, SSL_get_rbio(s), bio); 690 } else 691 SSL_set_bio(s, SSL_get_rbio(s), SSL_get_rbio(s)); 692 ret = 1; 693err: 694 return (ret); 695} 696 697int 698SSL_set_rfd(SSL *s, int fd) 699{ 700 int ret = 0; 701 BIO *bio = NULL; 702 703 if ((s->wbio == NULL) || (BIO_method_type(s->wbio) != BIO_TYPE_SOCKET) 704 || ((int)BIO_get_fd(s->wbio, NULL) != fd)) { 705 bio = BIO_new(BIO_s_socket()); 706 707 if (bio == NULL) { 708 SSLerr(SSL_F_SSL_SET_RFD, ERR_R_BUF_LIB); 709 goto err; 710 } 711 BIO_set_fd(bio, fd, BIO_NOCLOSE); 712 SSL_set_bio(s, bio, SSL_get_wbio(s)); 713 } else 714 SSL_set_bio(s, SSL_get_wbio(s), SSL_get_wbio(s)); 715 ret = 1; 716err: 717 return (ret); 718} 719 720 721/* return length of latest Finished message we sent, copy to 'buf' */ 722size_t 723SSL_get_finished(const SSL *s, void *buf, size_t count) 724{ 725 size_t ret = 0; 726 727 if (s->s3 != NULL) { 728 ret = S3I(s)->tmp.finish_md_len; 729 if (count > ret) 730 count = ret; 731 memcpy(buf, S3I(s)->tmp.finish_md, count); 732 } 733 return (ret); 734} 735 736/* return length of latest Finished message we expected, copy to 'buf' */ 737size_t 738SSL_get_peer_finished(const SSL *s, void *buf, size_t count) 739{ 740 size_t ret = 0; 741 742 if (s->s3 != NULL) { 743 ret = S3I(s)->tmp.peer_finish_md_len; 744 if (count > ret) 745 count = ret; 746 memcpy(buf, S3I(s)->tmp.peer_finish_md, count); 747 } 748 return (ret); 749} 750 751 752int 753SSL_get_verify_mode(const SSL *s) 754{ 755 return (s->verify_mode); 756} 757 758int 759SSL_get_verify_depth(const SSL *s) 760{ 761 return (X509_VERIFY_PARAM_get_depth(s->param)); 762} 763 764int 765(*SSL_get_verify_callback(const SSL *s))(int, X509_STORE_CTX *) 766{ 767 return (s->internal->verify_callback); 768} 769 770int 771SSL_CTX_get_verify_mode(const SSL_CTX *ctx) 772{ 773 return (ctx->verify_mode); 774} 775 776int 777SSL_CTX_get_verify_depth(const SSL_CTX *ctx) 778{ 779 return (X509_VERIFY_PARAM_get_depth(ctx->param)); 780} 781 782int (*SSL_CTX_get_verify_callback(const SSL_CTX *ctx))(int, X509_STORE_CTX *) 783{ 784 return (ctx->internal->default_verify_callback); 785} 786 787void 788SSL_set_verify(SSL *s, int mode, 789 int (*callback)(int ok, X509_STORE_CTX *ctx)) 790{ 791 s->verify_mode = mode; 792 if (callback != NULL) 793 s->internal->verify_callback = callback; 794} 795 796void 797SSL_set_verify_depth(SSL *s, int depth) 798{ 799 X509_VERIFY_PARAM_set_depth(s->param, depth); 800} 801 802void 803SSL_set_read_ahead(SSL *s, int yes) 804{ 805 s->internal->read_ahead = yes; 806} 807 808int 809SSL_get_read_ahead(const SSL *s) 810{ 811 return (s->internal->read_ahead); 812} 813 814int 815SSL_pending(const SSL *s) 816{ 817 /* 818 * SSL_pending cannot work properly if read-ahead is enabled 819 * (SSL_[CTX_]ctrl(..., SSL_CTRL_SET_READ_AHEAD, 1, NULL)), 820 * and it is impossible to fix since SSL_pending cannot report 821 * errors that may be observed while scanning the new data. 822 * (Note that SSL_pending() is often used as a boolean value, 823 * so we'd better not return -1.) 824 */ 825 return (s->method->internal->ssl_pending(s)); 826} 827 828X509 * 829SSL_get_peer_certificate(const SSL *s) 830{ 831 X509 *r; 832 833 if ((s == NULL) || (s->session == NULL)) 834 r = NULL; 835 else 836 r = s->session->peer; 837 838 if (r == NULL) 839 return (r); 840 841 CRYPTO_add(&r->references, 1, CRYPTO_LOCK_X509); 842 843 return (r); 844} 845 846STACK_OF(X509) * 847SSL_get_peer_cert_chain(const SSL *s) 848{ 849 STACK_OF(X509) *r; 850 851 if ((s == NULL) || (s->session == NULL) || 852 (SSI(s)->sess_cert == NULL)) 853 r = NULL; 854 else 855 r = SSI(s)->sess_cert->cert_chain; 856 857 /* 858 * If we are a client, cert_chain includes the peer's own 859 * certificate; 860 * if we are a server, it does not. 861 */ 862 return (r); 863} 864 865/* 866 * Now in theory, since the calling process own 't' it should be safe to 867 * modify. We need to be able to read f without being hassled 868 */ 869void 870SSL_copy_session_id(SSL *t, const SSL *f) 871{ 872 CERT *tmp; 873 874 /* Do we need to to SSL locking? */ 875 SSL_set_session(t, SSL_get_session(f)); 876 877 /* 878 * What if we are setup as SSLv2 but want to talk SSLv3 or 879 * vice-versa. 880 */ 881 if (t->method != f->method) { 882 t->method->internal->ssl_free(t); /* cleanup current */ 883 t->method = f->method; /* change method */ 884 t->method->internal->ssl_new(t); /* setup new */ 885 } 886 887 tmp = t->cert; 888 if (f->cert != NULL) { 889 CRYPTO_add(&f->cert->references, 1, CRYPTO_LOCK_SSL_CERT); 890 t->cert = f->cert; 891 } else 892 t->cert = NULL; 893 ssl_cert_free(tmp); 894 SSL_set_session_id_context(t, f->sid_ctx, f->sid_ctx_length); 895} 896 897/* Fix this so it checks all the valid key/cert options */ 898int 899SSL_CTX_check_private_key(const SSL_CTX *ctx) 900{ 901 if ((ctx == NULL) || (ctx->internal->cert == NULL) || 902 (ctx->internal->cert->key->x509 == NULL)) { 903 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY, 904 SSL_R_NO_CERTIFICATE_ASSIGNED); 905 return (0); 906 } 907 if (ctx->internal->cert->key->privatekey == NULL) { 908 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY, 909 SSL_R_NO_PRIVATE_KEY_ASSIGNED); 910 return (0); 911 } 912 return (X509_check_private_key(ctx->internal->cert->key->x509, 913 ctx->internal->cert->key->privatekey)); 914} 915 916/* Fix this function so that it takes an optional type parameter */ 917int 918SSL_check_private_key(const SSL *ssl) 919{ 920 if (ssl == NULL) { 921 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY, 922 ERR_R_PASSED_NULL_PARAMETER); 923 return (0); 924 } 925 if (ssl->cert == NULL) { 926 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY, 927 SSL_R_NO_CERTIFICATE_ASSIGNED); 928 return (0); 929 } 930 if (ssl->cert->key->x509 == NULL) { 931 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY, 932 SSL_R_NO_CERTIFICATE_ASSIGNED); 933 return (0); 934 } 935 if (ssl->cert->key->privatekey == NULL) { 936 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY, 937 SSL_R_NO_PRIVATE_KEY_ASSIGNED); 938 return (0); 939 } 940 return (X509_check_private_key(ssl->cert->key->x509, 941 ssl->cert->key->privatekey)); 942} 943 944int 945SSL_accept(SSL *s) 946{ 947 if (s->internal->handshake_func == NULL) 948 SSL_set_accept_state(s); /* Not properly initialized yet */ 949 950 return (s->method->internal->ssl_accept(s)); 951} 952 953int 954SSL_connect(SSL *s) 955{ 956 if (s->internal->handshake_func == NULL) 957 SSL_set_connect_state(s); /* Not properly initialized yet */ 958 959 return (s->method->internal->ssl_connect(s)); 960} 961 962long 963SSL_get_default_timeout(const SSL *s) 964{ 965 return (s->method->internal->get_timeout()); 966} 967 968int 969SSL_read(SSL *s, void *buf, int num) 970{ 971 if (s->internal->handshake_func == NULL) { 972 SSLerr(SSL_F_SSL_READ, SSL_R_UNINITIALIZED); 973 return (-1); 974 } 975 976 if (s->internal->shutdown & SSL_RECEIVED_SHUTDOWN) { 977 s->internal->rwstate = SSL_NOTHING; 978 return (0); 979 } 980 return (s->method->internal->ssl_read(s, buf, num)); 981} 982 983int 984SSL_peek(SSL *s, void *buf, int num) 985{ 986 if (s->internal->handshake_func == NULL) { 987 SSLerr(SSL_F_SSL_PEEK, SSL_R_UNINITIALIZED); 988 return (-1); 989 } 990 991 if (s->internal->shutdown & SSL_RECEIVED_SHUTDOWN) { 992 return (0); 993 } 994 return (s->method->internal->ssl_peek(s, buf, num)); 995} 996 997int 998SSL_write(SSL *s, const void *buf, int num) 999{ 1000 if (s->internal->handshake_func == NULL) { 1001 SSLerr(SSL_F_SSL_WRITE, SSL_R_UNINITIALIZED); 1002 return (-1); 1003 } 1004 1005 if (s->internal->shutdown & SSL_SENT_SHUTDOWN) { 1006 s->internal->rwstate = SSL_NOTHING; 1007 SSLerr(SSL_F_SSL_WRITE, SSL_R_PROTOCOL_IS_SHUTDOWN); 1008 return (-1); 1009 } 1010 return (s->method->internal->ssl_write(s, buf, num)); 1011} 1012 1013int 1014SSL_shutdown(SSL *s) 1015{ 1016 /* 1017 * Note that this function behaves differently from what one might 1018 * expect. Return values are 0 for no success (yet), 1019 * 1 for success; but calling it once is usually not enough, 1020 * even if blocking I/O is used (see ssl3_shutdown). 1021 */ 1022 1023 if (s->internal->handshake_func == NULL) { 1024 SSLerr(SSL_F_SSL_SHUTDOWN, SSL_R_UNINITIALIZED); 1025 return (-1); 1026 } 1027 1028 if ((s != NULL) && !SSL_in_init(s)) 1029 return (s->method->internal->ssl_shutdown(s)); 1030 else 1031 return (1); 1032} 1033 1034int 1035SSL_renegotiate(SSL *s) 1036{ 1037 if (s->internal->renegotiate == 0) 1038 s->internal->renegotiate = 1; 1039 1040 s->internal->new_session = 1; 1041 1042 return (s->method->internal->ssl_renegotiate(s)); 1043} 1044 1045int 1046SSL_renegotiate_abbreviated(SSL *s) 1047{ 1048 if (s->internal->renegotiate == 0) 1049 s->internal->renegotiate = 1; 1050 1051 s->internal->new_session = 0; 1052 1053 return (s->method->internal->ssl_renegotiate(s)); 1054} 1055 1056int 1057SSL_renegotiate_pending(SSL *s) 1058{ 1059 /* 1060 * Becomes true when negotiation is requested; 1061 * false again once a handshake has finished. 1062 */ 1063 return (s->internal->renegotiate != 0); 1064} 1065 1066long 1067SSL_ctrl(SSL *s, int cmd, long larg, void *parg) 1068{ 1069 long l; 1070 1071 switch (cmd) { 1072 case SSL_CTRL_GET_READ_AHEAD: 1073 return (s->internal->read_ahead); 1074 case SSL_CTRL_SET_READ_AHEAD: 1075 l = s->internal->read_ahead; 1076 s->internal->read_ahead = larg; 1077 return (l); 1078 1079 case SSL_CTRL_SET_MSG_CALLBACK_ARG: 1080 s->internal->msg_callback_arg = parg; 1081 return (1); 1082 1083 case SSL_CTRL_OPTIONS: 1084 return (s->internal->options|=larg); 1085 case SSL_CTRL_CLEAR_OPTIONS: 1086 return (s->internal->options&=~larg); 1087 case SSL_CTRL_MODE: 1088 return (s->internal->mode|=larg); 1089 case SSL_CTRL_CLEAR_MODE: 1090 return (s->internal->mode &=~larg); 1091 case SSL_CTRL_GET_MAX_CERT_LIST: 1092 return (s->internal->max_cert_list); 1093 case SSL_CTRL_SET_MAX_CERT_LIST: 1094 l = s->internal->max_cert_list; 1095 s->internal->max_cert_list = larg; 1096 return (l); 1097 case SSL_CTRL_SET_MTU: 1098#ifndef OPENSSL_NO_DTLS1 1099 if (larg < (long)dtls1_min_mtu()) 1100 return (0); 1101#endif 1102 if (SSL_IS_DTLS(s)) { 1103 D1I(s)->mtu = larg; 1104 return (larg); 1105 } 1106 return (0); 1107 case SSL_CTRL_SET_MAX_SEND_FRAGMENT: 1108 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH) 1109 return (0); 1110 s->max_send_fragment = larg; 1111 return (1); 1112 case SSL_CTRL_GET_RI_SUPPORT: 1113 if (s->s3) 1114 return (S3I(s)->send_connection_binding); 1115 else return (0); 1116 default: 1117 if (SSL_IS_DTLS(s)) 1118 return dtls1_ctrl(s, cmd, larg, parg); 1119 return ssl3_ctrl(s, cmd, larg, parg); 1120 } 1121} 1122 1123long 1124SSL_callback_ctrl(SSL *s, int cmd, void (*fp)(void)) 1125{ 1126 switch (cmd) { 1127 case SSL_CTRL_SET_MSG_CALLBACK: 1128 s->internal->msg_callback = (void (*)(int write_p, int version, 1129 int content_type, const void *buf, size_t len, 1130 SSL *ssl, void *arg))(fp); 1131 return (1); 1132 1133 default: 1134 return (ssl3_callback_ctrl(s, cmd, fp)); 1135 } 1136} 1137 1138struct lhash_st_SSL_SESSION * 1139SSL_CTX_sessions(SSL_CTX *ctx) 1140{ 1141 return (ctx->internal->sessions); 1142} 1143 1144long 1145SSL_CTX_ctrl(SSL_CTX *ctx, int cmd, long larg, void *parg) 1146{ 1147 long l; 1148 1149 switch (cmd) { 1150 case SSL_CTRL_GET_READ_AHEAD: 1151 return (ctx->internal->read_ahead); 1152 case SSL_CTRL_SET_READ_AHEAD: 1153 l = ctx->internal->read_ahead; 1154 ctx->internal->read_ahead = larg; 1155 return (l); 1156 1157 case SSL_CTRL_SET_MSG_CALLBACK_ARG: 1158 ctx->internal->msg_callback_arg = parg; 1159 return (1); 1160 1161 case SSL_CTRL_GET_MAX_CERT_LIST: 1162 return (ctx->internal->max_cert_list); 1163 case SSL_CTRL_SET_MAX_CERT_LIST: 1164 l = ctx->internal->max_cert_list; 1165 ctx->internal->max_cert_list = larg; 1166 return (l); 1167 1168 case SSL_CTRL_SET_SESS_CACHE_SIZE: 1169 l = ctx->internal->session_cache_size; 1170 ctx->internal->session_cache_size = larg; 1171 return (l); 1172 case SSL_CTRL_GET_SESS_CACHE_SIZE: 1173 return (ctx->internal->session_cache_size); 1174 case SSL_CTRL_SET_SESS_CACHE_MODE: 1175 l = ctx->internal->session_cache_mode; 1176 ctx->internal->session_cache_mode = larg; 1177 return (l); 1178 case SSL_CTRL_GET_SESS_CACHE_MODE: 1179 return (ctx->internal->session_cache_mode); 1180 1181 case SSL_CTRL_SESS_NUMBER: 1182 return (lh_SSL_SESSION_num_items(ctx->internal->sessions)); 1183 case SSL_CTRL_SESS_CONNECT: 1184 return (ctx->internal->stats.sess_connect); 1185 case SSL_CTRL_SESS_CONNECT_GOOD: 1186 return (ctx->internal->stats.sess_connect_good); 1187 case SSL_CTRL_SESS_CONNECT_RENEGOTIATE: 1188 return (ctx->internal->stats.sess_connect_renegotiate); 1189 case SSL_CTRL_SESS_ACCEPT: 1190 return (ctx->internal->stats.sess_accept); 1191 case SSL_CTRL_SESS_ACCEPT_GOOD: 1192 return (ctx->internal->stats.sess_accept_good); 1193 case SSL_CTRL_SESS_ACCEPT_RENEGOTIATE: 1194 return (ctx->internal->stats.sess_accept_renegotiate); 1195 case SSL_CTRL_SESS_HIT: 1196 return (ctx->internal->stats.sess_hit); 1197 case SSL_CTRL_SESS_CB_HIT: 1198 return (ctx->internal->stats.sess_cb_hit); 1199 case SSL_CTRL_SESS_MISSES: 1200 return (ctx->internal->stats.sess_miss); 1201 case SSL_CTRL_SESS_TIMEOUTS: 1202 return (ctx->internal->stats.sess_timeout); 1203 case SSL_CTRL_SESS_CACHE_FULL: 1204 return (ctx->internal->stats.sess_cache_full); 1205 case SSL_CTRL_OPTIONS: 1206 return (ctx->internal->options|=larg); 1207 case SSL_CTRL_CLEAR_OPTIONS: 1208 return (ctx->internal->options&=~larg); 1209 case SSL_CTRL_MODE: 1210 return (ctx->internal->mode|=larg); 1211 case SSL_CTRL_CLEAR_MODE: 1212 return (ctx->internal->mode&=~larg); 1213 case SSL_CTRL_SET_MAX_SEND_FRAGMENT: 1214 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH) 1215 return (0); 1216 ctx->internal->max_send_fragment = larg; 1217 return (1); 1218 default: 1219 return (ssl3_ctx_ctrl(ctx, cmd, larg, parg)); 1220 } 1221} 1222 1223long 1224SSL_CTX_callback_ctrl(SSL_CTX *ctx, int cmd, void (*fp)(void)) 1225{ 1226 switch (cmd) { 1227 case SSL_CTRL_SET_MSG_CALLBACK: 1228 ctx->internal->msg_callback = (void (*)(int write_p, int version, 1229 int content_type, const void *buf, size_t len, SSL *ssl, 1230 void *arg))(fp); 1231 return (1); 1232 1233 default: 1234 return (ssl3_ctx_callback_ctrl(ctx, cmd, fp)); 1235 } 1236} 1237 1238int 1239ssl_cipher_id_cmp(const SSL_CIPHER *a, const SSL_CIPHER *b) 1240{ 1241 long l; 1242 1243 l = a->id - b->id; 1244 if (l == 0L) 1245 return (0); 1246 else 1247 return ((l > 0) ? 1:-1); 1248} 1249 1250int 1251ssl_cipher_ptr_id_cmp(const SSL_CIPHER * const *ap, 1252 const SSL_CIPHER * const *bp) 1253{ 1254 long l; 1255 1256 l = (*ap)->id - (*bp)->id; 1257 if (l == 0L) 1258 return (0); 1259 else 1260 return ((l > 0) ? 1:-1); 1261} 1262 1263/* 1264 * Return a STACK of the ciphers available for the SSL and in order of 1265 * preference. 1266 */ 1267STACK_OF(SSL_CIPHER) * 1268SSL_get_ciphers(const SSL *s) 1269{ 1270 if (s != NULL) { 1271 if (s->cipher_list != NULL) { 1272 return (s->cipher_list); 1273 } else if ((s->ctx != NULL) && (s->ctx->cipher_list != NULL)) { 1274 return (s->ctx->cipher_list); 1275 } 1276 } 1277 return (NULL); 1278} 1279 1280/* 1281 * Return a STACK of the ciphers available for the SSL and in order of 1282 * algorithm id. 1283 */ 1284STACK_OF(SSL_CIPHER) * 1285ssl_get_ciphers_by_id(SSL *s) 1286{ 1287 if (s != NULL) { 1288 if (s->internal->cipher_list_by_id != NULL) { 1289 return (s->internal->cipher_list_by_id); 1290 } else if ((s->ctx != NULL) && 1291 (s->ctx->internal->cipher_list_by_id != NULL)) { 1292 return (s->ctx->internal->cipher_list_by_id); 1293 } 1294 } 1295 return (NULL); 1296} 1297 1298/* The old interface to get the same thing as SSL_get_ciphers(). */ 1299const char * 1300SSL_get_cipher_list(const SSL *s, int n) 1301{ 1302 SSL_CIPHER *c; 1303 STACK_OF(SSL_CIPHER) *sk; 1304 1305 if (s == NULL) 1306 return (NULL); 1307 sk = SSL_get_ciphers(s); 1308 if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= n)) 1309 return (NULL); 1310 c = sk_SSL_CIPHER_value(sk, n); 1311 if (c == NULL) 1312 return (NULL); 1313 return (c->name); 1314} 1315 1316/* Specify the ciphers to be used by default by the SSL_CTX. */ 1317int 1318SSL_CTX_set_cipher_list(SSL_CTX *ctx, const char *str) 1319{ 1320 STACK_OF(SSL_CIPHER) *sk; 1321 1322 sk = ssl_create_cipher_list(ctx->method, &ctx->cipher_list, 1323 &ctx->internal->cipher_list_by_id, str); 1324 /* 1325 * ssl_create_cipher_list may return an empty stack if it 1326 * was unable to find a cipher matching the given rule string 1327 * (for example if the rule string specifies a cipher which 1328 * has been disabled). This is not an error as far as 1329 * ssl_create_cipher_list is concerned, and hence 1330 * ctx->cipher_list and ctx->internal->cipher_list_by_id has been 1331 * updated. 1332 */ 1333 if (sk == NULL) 1334 return (0); 1335 else if (sk_SSL_CIPHER_num(sk) == 0) { 1336 SSLerr(SSL_F_SSL_CTX_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH); 1337 return (0); 1338 } 1339 return (1); 1340} 1341 1342/* Specify the ciphers to be used by the SSL. */ 1343int 1344SSL_set_cipher_list(SSL *s, const char *str) 1345{ 1346 STACK_OF(SSL_CIPHER) *sk; 1347 1348 sk = ssl_create_cipher_list(s->ctx->method, &s->cipher_list, 1349 &s->internal->cipher_list_by_id, str); 1350 /* see comment in SSL_CTX_set_cipher_list */ 1351 if (sk == NULL) 1352 return (0); 1353 else if (sk_SSL_CIPHER_num(sk) == 0) { 1354 SSLerr(SSL_F_SSL_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH); 1355 return (0); 1356 } 1357 return (1); 1358} 1359 1360/* works well for SSLv2, not so good for SSLv3 */ 1361char * 1362SSL_get_shared_ciphers(const SSL *s, char *buf, int len) 1363{ 1364 char *end; 1365 STACK_OF(SSL_CIPHER) *sk; 1366 SSL_CIPHER *c; 1367 size_t curlen = 0; 1368 int i; 1369 1370 if (s->session == NULL || s->session->ciphers == NULL || len < 2) 1371 return (NULL); 1372 1373 sk = s->session->ciphers; 1374 if (sk_SSL_CIPHER_num(sk) == 0) 1375 return (NULL); 1376 1377 buf[0] = '\0'; 1378 for (i = 0; i < sk_SSL_CIPHER_num(sk); i++) { 1379 c = sk_SSL_CIPHER_value(sk, i); 1380 end = buf + curlen; 1381 if (strlcat(buf, c->name, len) >= len || 1382 (curlen = strlcat(buf, ":", len)) >= len) { 1383 /* remove truncated cipher from list */ 1384 *end = '\0'; 1385 break; 1386 } 1387 } 1388 /* remove trailing colon */ 1389 if ((end = strrchr(buf, ':')) != NULL) 1390 *end = '\0'; 1391 return (buf); 1392} 1393 1394int 1395ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk, unsigned char *p, 1396 size_t maxlen, size_t *outlen) 1397{ 1398 SSL_CIPHER *cipher; 1399 int ciphers = 0; 1400 CBB cbb; 1401 int i; 1402 1403 *outlen = 0; 1404 1405 if (sk == NULL) 1406 return (0); 1407 1408 if (!CBB_init_fixed(&cbb, p, maxlen)) 1409 goto err; 1410 1411 for (i = 0; i < sk_SSL_CIPHER_num(sk); i++) { 1412 cipher = sk_SSL_CIPHER_value(sk, i); 1413 1414 /* Skip TLS v1.2 only ciphersuites if lower than v1.2 */ 1415 if ((cipher->algorithm_ssl & SSL_TLSV1_2) && 1416 (TLS1_get_client_version(s) < TLS1_2_VERSION)) 1417 continue; 1418 1419 if (!CBB_add_u16(&cbb, ssl3_cipher_get_value(cipher))) 1420 goto err; 1421 1422 ciphers++; 1423 } 1424 1425 /* Add SCSV if there are other ciphers and we're not renegotiating. */ 1426 if (ciphers > 0 && !s->internal->renegotiate) { 1427 if (!CBB_add_u16(&cbb, SSL3_CK_SCSV & SSL3_CK_VALUE_MASK)) 1428 goto err; 1429 } 1430 1431 if (!CBB_finish(&cbb, NULL, outlen)) 1432 goto err; 1433 1434 return 1; 1435 1436 err: 1437 CBB_cleanup(&cbb); 1438 1439 return 0; 1440} 1441 1442STACK_OF(SSL_CIPHER) * 1443ssl_bytes_to_cipher_list(SSL *s, const unsigned char *p, int num) 1444{ 1445 CBS cbs; 1446 const SSL_CIPHER *c; 1447 STACK_OF(SSL_CIPHER) *sk = NULL; 1448 unsigned long cipher_id; 1449 uint16_t cipher_value, max_version; 1450 1451 if (s->s3) 1452 S3I(s)->send_connection_binding = 0; 1453 1454 /* 1455 * RFC 5246 section 7.4.1.2 defines the interval as [2,2^16-2]. 1456 */ 1457 if (num < 2 || num > 0x10000 - 2) { 1458 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST, 1459 SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST); 1460 return (NULL); 1461 } 1462 1463 if ((sk = sk_SSL_CIPHER_new_null()) == NULL) { 1464 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST, ERR_R_MALLOC_FAILURE); 1465 goto err; 1466 } 1467 1468 CBS_init(&cbs, p, num); 1469 while (CBS_len(&cbs) > 0) { 1470 if (!CBS_get_u16(&cbs, &cipher_value)) { 1471 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST, 1472 SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST); 1473 goto err; 1474 } 1475 1476 cipher_id = SSL3_CK_ID | cipher_value; 1477 1478 if (s->s3 != NULL && cipher_id == SSL3_CK_SCSV) { 1479 /* 1480 * TLS_EMPTY_RENEGOTIATION_INFO_SCSV is fatal if 1481 * renegotiating. 1482 */ 1483 if (s->internal->renegotiate) { 1484 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST, 1485 SSL_R_SCSV_RECEIVED_WHEN_RENEGOTIATING); 1486 ssl3_send_alert(s, SSL3_AL_FATAL, 1487 SSL_AD_HANDSHAKE_FAILURE); 1488 1489 goto err; 1490 } 1491 S3I(s)->send_connection_binding = 1; 1492 continue; 1493 } 1494 1495 if (cipher_id == SSL3_CK_FALLBACK_SCSV) { 1496 /* 1497 * TLS_FALLBACK_SCSV indicates that the client 1498 * previously tried a higher protocol version. 1499 * Fail if the current version is an unexpected 1500 * downgrade. 1501 */ 1502 max_version = ssl_max_server_version(s); 1503 if (max_version == 0 || s->version < max_version) { 1504 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST, 1505 SSL_R_INAPPROPRIATE_FALLBACK); 1506 if (s->s3 != NULL) 1507 ssl3_send_alert(s, SSL3_AL_FATAL, 1508 SSL_AD_INAPPROPRIATE_FALLBACK); 1509 goto err; 1510 } 1511 continue; 1512 } 1513 1514 if ((c = ssl3_get_cipher_by_value(cipher_value)) != NULL) { 1515 if (!sk_SSL_CIPHER_push(sk, c)) { 1516 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST, 1517 ERR_R_MALLOC_FAILURE); 1518 goto err; 1519 } 1520 } 1521 } 1522 1523 return (sk); 1524 1525err: 1526 sk_SSL_CIPHER_free(sk); 1527 1528 return (NULL); 1529} 1530 1531 1532/* 1533 * Return a servername extension value if provided in Client Hello, or NULL. 1534 * So far, only host_name types are defined (RFC 3546). 1535 */ 1536const char * 1537SSL_get_servername(const SSL *s, const int type) 1538{ 1539 if (type != TLSEXT_NAMETYPE_host_name) 1540 return (NULL); 1541 1542 return (s->session && !s->tlsext_hostname ? 1543 s->session->tlsext_hostname : 1544 s->tlsext_hostname); 1545} 1546 1547int 1548SSL_get_servername_type(const SSL *s) 1549{ 1550 if (s->session && 1551 (!s->tlsext_hostname ? 1552 s->session->tlsext_hostname : s->tlsext_hostname)) 1553 return (TLSEXT_NAMETYPE_host_name); 1554 return (-1); 1555} 1556 1557/* 1558 * SSL_select_next_proto implements the standard protocol selection. It is 1559 * expected that this function is called from the callback set by 1560 * SSL_CTX_set_next_proto_select_cb. 1561 * 1562 * The protocol data is assumed to be a vector of 8-bit, length prefixed byte 1563 * strings. The length byte itself is not included in the length. A byte 1564 * string of length 0 is invalid. No byte string may be truncated. 1565 * 1566 * The current, but experimental algorithm for selecting the protocol is: 1567 * 1568 * 1) If the server doesn't support NPN then this is indicated to the 1569 * callback. In this case, the client application has to abort the connection 1570 * or have a default application level protocol. 1571 * 1572 * 2) If the server supports NPN, but advertises an empty list then the 1573 * client selects the first protcol in its list, but indicates via the 1574 * API that this fallback case was enacted. 1575 * 1576 * 3) Otherwise, the client finds the first protocol in the server's list 1577 * that it supports and selects this protocol. This is because it's 1578 * assumed that the server has better information about which protocol 1579 * a client should use. 1580 * 1581 * 4) If the client doesn't support any of the server's advertised 1582 * protocols, then this is treated the same as case 2. 1583 * 1584 * It returns either 1585 * OPENSSL_NPN_NEGOTIATED if a common protocol was found, or 1586 * OPENSSL_NPN_NO_OVERLAP if the fallback case was reached. 1587 */ 1588int 1589SSL_select_next_proto(unsigned char **out, unsigned char *outlen, 1590 const unsigned char *server, unsigned int server_len, 1591 const unsigned char *client, unsigned int client_len) 1592{ 1593 unsigned int i, j; 1594 const unsigned char *result; 1595 int status = OPENSSL_NPN_UNSUPPORTED; 1596 1597 /* 1598 * For each protocol in server preference order, 1599 * see if we support it. 1600 */ 1601 for (i = 0; i < server_len; ) { 1602 for (j = 0; j < client_len; ) { 1603 if (server[i] == client[j] && 1604 memcmp(&server[i + 1], 1605 &client[j + 1], server[i]) == 0) { 1606 /* We found a match */ 1607 result = &server[i]; 1608 status = OPENSSL_NPN_NEGOTIATED; 1609 goto found; 1610 } 1611 j += client[j]; 1612 j++; 1613 } 1614 i += server[i]; 1615 i++; 1616 } 1617 1618 /* There's no overlap between our protocols and the server's list. */ 1619 result = client; 1620 status = OPENSSL_NPN_NO_OVERLAP; 1621 1622found: 1623 *out = (unsigned char *) result + 1; 1624 *outlen = result[0]; 1625 return (status); 1626} 1627 1628/* 1629 * SSL_get0_next_proto_negotiated sets *data and *len to point to the client's 1630 * requested protocol for this connection and returns 0. If the client didn't 1631 * request any protocol, then *data is set to NULL. 1632 * 1633 * Note that the client can request any protocol it chooses. The value returned 1634 * from this function need not be a member of the list of supported protocols 1635 * provided by the callback. 1636 */ 1637void 1638SSL_get0_next_proto_negotiated(const SSL *s, const unsigned char **data, 1639 unsigned *len) 1640{ 1641 *data = s->internal->next_proto_negotiated; 1642 if (!*data) { 1643 *len = 0; 1644 } else { 1645 *len = s->internal->next_proto_negotiated_len; 1646 } 1647} 1648 1649/* 1650 * SSL_CTX_set_next_protos_advertised_cb sets a callback that is called when a 1651 * TLS server needs a list of supported protocols for Next Protocol 1652 * Negotiation. The returned list must be in wire format. The list is returned 1653 * by setting |out| to point to it and |outlen| to its length. This memory will 1654 * not be modified, but one should assume that the SSL* keeps a reference to 1655 * it. 1656 * 1657 * The callback should return SSL_TLSEXT_ERR_OK if it wishes to advertise. 1658 * Otherwise, no such extension will be included in the ServerHello. 1659 */ 1660void 1661SSL_CTX_set_next_protos_advertised_cb(SSL_CTX *ctx, int (*cb) (SSL *ssl, 1662 const unsigned char **out, unsigned int *outlen, void *arg), void *arg) 1663{ 1664 ctx->internal->next_protos_advertised_cb = cb; 1665 ctx->internal->next_protos_advertised_cb_arg = arg; 1666} 1667 1668/* 1669 * SSL_CTX_set_next_proto_select_cb sets a callback that is called when a 1670 * client needs to select a protocol from the server's provided list. |out| 1671 * must be set to point to the selected protocol (which may be within |in|). 1672 * The length of the protocol name must be written into |outlen|. The server's 1673 * advertised protocols are provided in |in| and |inlen|. The callback can 1674 * assume that |in| is syntactically valid. 1675 * 1676 * The client must select a protocol. It is fatal to the connection if this 1677 * callback returns a value other than SSL_TLSEXT_ERR_OK. 1678 */ 1679void 1680SSL_CTX_set_next_proto_select_cb(SSL_CTX *ctx, int (*cb) (SSL *s, 1681 unsigned char **out, unsigned char *outlen, const unsigned char *in, 1682 unsigned int inlen, void *arg), void *arg) 1683{ 1684 ctx->internal->next_proto_select_cb = cb; 1685 ctx->internal->next_proto_select_cb_arg = arg; 1686} 1687 1688/* 1689 * SSL_CTX_set_alpn_protos sets the ALPN protocol list to the specified 1690 * protocols, which must be in wire-format (i.e. a series of non-empty, 1691 * 8-bit length-prefixed strings). Returns 0 on success. 1692 */ 1693int 1694SSL_CTX_set_alpn_protos(SSL_CTX *ctx, const unsigned char *protos, 1695 unsigned int protos_len) 1696{ 1697 free(ctx->internal->alpn_client_proto_list); 1698 if ((ctx->internal->alpn_client_proto_list = malloc(protos_len)) == NULL) 1699 return (1); 1700 memcpy(ctx->internal->alpn_client_proto_list, protos, protos_len); 1701 ctx->internal->alpn_client_proto_list_len = protos_len; 1702 1703 return (0); 1704} 1705 1706/* 1707 * SSL_set_alpn_protos sets the ALPN protocol list to the specified 1708 * protocols, which must be in wire-format (i.e. a series of non-empty, 1709 * 8-bit length-prefixed strings). Returns 0 on success. 1710 */ 1711int 1712SSL_set_alpn_protos(SSL *ssl, const unsigned char* protos, 1713 unsigned int protos_len) 1714{ 1715 free(ssl->internal->alpn_client_proto_list); 1716 if ((ssl->internal->alpn_client_proto_list = malloc(protos_len)) == NULL) 1717 return (1); 1718 memcpy(ssl->internal->alpn_client_proto_list, protos, protos_len); 1719 ssl->internal->alpn_client_proto_list_len = protos_len; 1720 1721 return (0); 1722} 1723 1724/* 1725 * SSL_CTX_set_alpn_select_cb sets a callback function that is called during 1726 * ClientHello processing in order to select an ALPN protocol from the 1727 * client's list of offered protocols. 1728 */ 1729void 1730SSL_CTX_set_alpn_select_cb(SSL_CTX* ctx, 1731 int (*cb) (SSL *ssl, const unsigned char **out, unsigned char *outlen, 1732 const unsigned char *in, unsigned int inlen, void *arg), void *arg) 1733{ 1734 ctx->internal->alpn_select_cb = cb; 1735 ctx->internal->alpn_select_cb_arg = arg; 1736} 1737 1738/* 1739 * SSL_get0_alpn_selected gets the selected ALPN protocol (if any). On return 1740 * it sets data to point to len bytes of protocol name (not including the 1741 * leading length-prefix byte). If the server didn't respond with* a negotiated 1742 * protocol then len will be zero. 1743 */ 1744void 1745SSL_get0_alpn_selected(const SSL *ssl, const unsigned char **data, 1746 unsigned *len) 1747{ 1748 *data = NULL; 1749 *len = 0; 1750 1751 if (ssl->s3 != NULL) { 1752 *data = ssl->s3->internal->alpn_selected; 1753 *len = ssl->s3->internal->alpn_selected_len; 1754 } 1755} 1756 1757int 1758SSL_export_keying_material(SSL *s, unsigned char *out, size_t olen, 1759 const char *label, size_t llen, const unsigned char *p, size_t plen, 1760 int use_context) 1761{ 1762 return (s->method->internal->ssl3_enc->export_keying_material(s, out, olen, 1763 label, llen, p, plen, use_context)); 1764} 1765 1766static unsigned long 1767ssl_session_hash(const SSL_SESSION *a) 1768{ 1769 unsigned long l; 1770 1771 l = (unsigned long) 1772 ((unsigned int) a->session_id[0] )| 1773 ((unsigned int) a->session_id[1]<< 8L)| 1774 ((unsigned long)a->session_id[2]<<16L)| 1775 ((unsigned long)a->session_id[3]<<24L); 1776 return (l); 1777} 1778 1779/* 1780 * NB: If this function (or indeed the hash function which uses a sort of 1781 * coarser function than this one) is changed, ensure 1782 * SSL_CTX_has_matching_session_id() is checked accordingly. It relies on being 1783 * able to construct an SSL_SESSION that will collide with any existing session 1784 * with a matching session ID. 1785 */ 1786static int 1787ssl_session_cmp(const SSL_SESSION *a, const SSL_SESSION *b) 1788{ 1789 if (a->ssl_version != b->ssl_version) 1790 return (1); 1791 if (a->session_id_length != b->session_id_length) 1792 return (1); 1793 if (timingsafe_memcmp(a->session_id, b->session_id, a->session_id_length) != 0) 1794 return (1); 1795 return (0); 1796} 1797 1798/* 1799 * These wrapper functions should remain rather than redeclaring 1800 * SSL_SESSION_hash and SSL_SESSION_cmp for void* types and casting each 1801 * variable. The reason is that the functions aren't static, they're exposed via 1802 * ssl.h. 1803 */ 1804static unsigned long 1805ssl_session_LHASH_HASH(const void *arg) 1806{ 1807 const SSL_SESSION *a = arg; 1808 1809 return ssl_session_hash(a); 1810} 1811 1812static int 1813ssl_session_LHASH_COMP(const void *arg1, const void *arg2) 1814{ 1815 const SSL_SESSION *a = arg1; 1816 const SSL_SESSION *b = arg2; 1817 1818 return ssl_session_cmp(a, b); 1819} 1820 1821SSL_CTX * 1822SSL_CTX_new(const SSL_METHOD *meth) 1823{ 1824 SSL_CTX *ret; 1825 1826 if (meth == NULL) { 1827 SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_NULL_SSL_METHOD_PASSED); 1828 return (NULL); 1829 } 1830 1831 if ((ret = calloc(1, sizeof(*ret))) == NULL) { 1832 SSLerr(SSL_F_SSL_CTX_NEW, ERR_R_MALLOC_FAILURE); 1833 return (NULL); 1834 } 1835 if ((ret->internal = calloc(1, sizeof(*ret->internal))) == NULL) { 1836 free(ret); 1837 SSLerr(SSL_F_SSL_CTX_NEW, ERR_R_MALLOC_FAILURE); 1838 return (NULL); 1839 } 1840 1841 if (SSL_get_ex_data_X509_STORE_CTX_idx() < 0) { 1842 SSLerr(SSL_F_SSL_CTX_NEW, 1843 SSL_R_X509_VERIFICATION_SETUP_PROBLEMS); 1844 goto err; 1845 } 1846 1847 ret->method = meth; 1848 1849 ret->cert_store = NULL; 1850 ret->internal->session_cache_mode = SSL_SESS_CACHE_SERVER; 1851 ret->internal->session_cache_size = SSL_SESSION_CACHE_MAX_SIZE_DEFAULT; 1852 ret->internal->session_cache_head = NULL; 1853 ret->internal->session_cache_tail = NULL; 1854 1855 /* We take the system default */ 1856 ret->session_timeout = meth->internal->get_timeout(); 1857 1858 ret->internal->new_session_cb = 0; 1859 ret->internal->remove_session_cb = 0; 1860 ret->internal->get_session_cb = 0; 1861 ret->internal->generate_session_id = 0; 1862 1863 memset((char *)&ret->internal->stats, 0, sizeof(ret->internal->stats)); 1864 1865 ret->references = 1; 1866 ret->internal->quiet_shutdown = 0; 1867 1868 ret->internal->info_callback = NULL; 1869 1870 ret->internal->app_verify_callback = 0; 1871 ret->internal->app_verify_arg = NULL; 1872 1873 ret->internal->max_cert_list = SSL_MAX_CERT_LIST_DEFAULT; 1874 ret->internal->read_ahead = 0; 1875 ret->internal->msg_callback = 0; 1876 ret->internal->msg_callback_arg = NULL; 1877 ret->verify_mode = SSL_VERIFY_NONE; 1878 ret->sid_ctx_length = 0; 1879 ret->internal->default_verify_callback = NULL; 1880 if ((ret->internal->cert = ssl_cert_new()) == NULL) 1881 goto err; 1882 1883 ret->default_passwd_callback = 0; 1884 ret->default_passwd_callback_userdata = NULL; 1885 ret->internal->client_cert_cb = 0; 1886 ret->internal->app_gen_cookie_cb = 0; 1887 ret->internal->app_verify_cookie_cb = 0; 1888 1889 ret->internal->sessions = lh_SSL_SESSION_new(); 1890 if (ret->internal->sessions == NULL) 1891 goto err; 1892 ret->cert_store = X509_STORE_new(); 1893 if (ret->cert_store == NULL) 1894 goto err; 1895 1896 ssl_create_cipher_list(ret->method, &ret->cipher_list, 1897 &ret->internal->cipher_list_by_id, SSL_DEFAULT_CIPHER_LIST); 1898 if (ret->cipher_list == NULL || 1899 sk_SSL_CIPHER_num(ret->cipher_list) <= 0) { 1900 SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_LIBRARY_HAS_NO_CIPHERS); 1901 goto err2; 1902 } 1903 1904 ret->param = X509_VERIFY_PARAM_new(); 1905 if (!ret->param) 1906 goto err; 1907 1908 if ((ret->internal->md5 = EVP_get_digestbyname("ssl3-md5")) == NULL) { 1909 SSLerr(SSL_F_SSL_CTX_NEW, 1910 SSL_R_UNABLE_TO_LOAD_SSL3_MD5_ROUTINES); 1911 goto err2; 1912 } 1913 if ((ret->internal->sha1 = EVP_get_digestbyname("ssl3-sha1")) == NULL) { 1914 SSLerr(SSL_F_SSL_CTX_NEW, 1915 SSL_R_UNABLE_TO_LOAD_SSL3_SHA1_ROUTINES); 1916 goto err2; 1917 } 1918 1919 if ((ret->internal->client_CA = sk_X509_NAME_new_null()) == NULL) 1920 goto err; 1921 1922 CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_CTX, ret, &ret->internal->ex_data); 1923 1924 ret->extra_certs = NULL; 1925 1926 ret->internal->max_send_fragment = SSL3_RT_MAX_PLAIN_LENGTH; 1927 1928 ret->internal->tlsext_servername_callback = 0; 1929 ret->internal->tlsext_servername_arg = NULL; 1930 1931 /* Setup RFC4507 ticket keys */ 1932 arc4random_buf(ret->internal->tlsext_tick_key_name, 16); 1933 arc4random_buf(ret->internal->tlsext_tick_hmac_key, 16); 1934 arc4random_buf(ret->internal->tlsext_tick_aes_key, 16); 1935 1936 ret->internal->tlsext_status_cb = 0; 1937 ret->internal->tlsext_status_arg = NULL; 1938 1939 ret->internal->next_protos_advertised_cb = 0; 1940 ret->internal->next_proto_select_cb = 0; 1941 1942#ifndef OPENSSL_NO_ENGINE 1943 ret->internal->client_cert_engine = NULL; 1944#ifdef OPENSSL_SSL_CLIENT_ENGINE_AUTO 1945#define eng_strx(x) #x 1946#define eng_str(x) eng_strx(x) 1947 /* Use specific client engine automatically... ignore errors */ 1948 { 1949 ENGINE *eng; 1950 eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO)); 1951 if (!eng) { 1952 ERR_clear_error(); 1953 ENGINE_load_builtin_engines(); 1954 eng = ENGINE_by_id(eng_str( 1955 OPENSSL_SSL_CLIENT_ENGINE_AUTO)); 1956 } 1957 if (!eng || !SSL_CTX_set_client_cert_engine(ret, eng)) 1958 ERR_clear_error(); 1959 } 1960#endif 1961#endif 1962 /* 1963 * Default is to connect to non-RI servers. When RI is more widely 1964 * deployed might change this. 1965 */ 1966 ret->internal->options |= SSL_OP_LEGACY_SERVER_CONNECT; 1967 1968 return (ret); 1969err: 1970 SSLerr(SSL_F_SSL_CTX_NEW, ERR_R_MALLOC_FAILURE); 1971err2: 1972 SSL_CTX_free(ret); 1973 return (NULL); 1974} 1975 1976void 1977SSL_CTX_free(SSL_CTX *ctx) 1978{ 1979 int i; 1980 1981 if (ctx == NULL) 1982 return; 1983 1984 i = CRYPTO_add(&ctx->references, -1, CRYPTO_LOCK_SSL_CTX); 1985 if (i > 0) 1986 return; 1987 1988 if (ctx->param) 1989 X509_VERIFY_PARAM_free(ctx->param); 1990 1991 /* 1992 * Free internal session cache. However: the remove_cb() may reference 1993 * the ex_data of SSL_CTX, thus the ex_data store can only be removed 1994 * after the sessions were flushed. 1995 * As the ex_data handling routines might also touch the session cache, 1996 * the most secure solution seems to be: empty (flush) the cache, then 1997 * free ex_data, then finally free the cache. 1998 * (See ticket [openssl.org #212].) 1999 */ 2000 if (ctx->internal->sessions != NULL) 2001 SSL_CTX_flush_sessions(ctx, 0); 2002 2003 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_CTX, ctx, &ctx->internal->ex_data); 2004 2005 if (ctx->internal->sessions != NULL) 2006 lh_SSL_SESSION_free(ctx->internal->sessions); 2007 2008 if (ctx->cert_store != NULL) 2009 X509_STORE_free(ctx->cert_store); 2010 sk_SSL_CIPHER_free(ctx->cipher_list); 2011 sk_SSL_CIPHER_free(ctx->internal->cipher_list_by_id); 2012 ssl_cert_free(ctx->internal->cert); 2013 sk_X509_NAME_pop_free(ctx->internal->client_CA, X509_NAME_free); 2014 sk_X509_pop_free(ctx->extra_certs, X509_free); 2015 2016#ifndef OPENSSL_NO_SRTP 2017 if (ctx->internal->srtp_profiles) 2018 sk_SRTP_PROTECTION_PROFILE_free(ctx->internal->srtp_profiles); 2019#endif 2020 2021#ifndef OPENSSL_NO_ENGINE 2022 if (ctx->internal->client_cert_engine) 2023 ENGINE_finish(ctx->internal->client_cert_engine); 2024#endif 2025 2026 free(ctx->internal->tlsext_ecpointformatlist); 2027 free(ctx->internal->tlsext_supportedgroups); 2028 2029 free(ctx->internal->alpn_client_proto_list); 2030 2031 free(ctx->internal); 2032 free(ctx); 2033} 2034 2035void 2036SSL_CTX_set_default_passwd_cb(SSL_CTX *ctx, pem_password_cb *cb) 2037{ 2038 ctx->default_passwd_callback = cb; 2039} 2040 2041void 2042SSL_CTX_set_default_passwd_cb_userdata(SSL_CTX *ctx, void *u) 2043{ 2044 ctx->default_passwd_callback_userdata = u; 2045} 2046 2047void 2048SSL_CTX_set_cert_verify_callback(SSL_CTX *ctx, int (*cb)(X509_STORE_CTX *, 2049 void *), void *arg) 2050{ 2051 ctx->internal->app_verify_callback = cb; 2052 ctx->internal->app_verify_arg = arg; 2053} 2054 2055void 2056SSL_CTX_set_verify(SSL_CTX *ctx, int mode, int (*cb)(int, X509_STORE_CTX *)) 2057{ 2058 ctx->verify_mode = mode; 2059 ctx->internal->default_verify_callback = cb; 2060} 2061 2062void 2063SSL_CTX_set_verify_depth(SSL_CTX *ctx, int depth) 2064{ 2065 X509_VERIFY_PARAM_set_depth(ctx->param, depth); 2066} 2067 2068void 2069ssl_set_cert_masks(CERT *c, const SSL_CIPHER *cipher) 2070{ 2071 int rsa_enc, rsa_sign, dh_tmp, dsa_sign; 2072 int have_ecc_cert, have_ecdh_tmp; 2073 unsigned long mask_k, mask_a; 2074 X509 *x = NULL; 2075 CERT_PKEY *cpk; 2076 2077 if (c == NULL) 2078 return; 2079 2080 dh_tmp = (c->dh_tmp != NULL || c->dh_tmp_cb != NULL || 2081 c->dh_tmp_auto != 0); 2082 2083 have_ecdh_tmp = (c->ecdh_tmp != NULL || c->ecdh_tmp_cb != NULL || 2084 c->ecdh_tmp_auto != 0); 2085 2086 cpk = &(c->pkeys[SSL_PKEY_RSA_ENC]); 2087 rsa_enc = (cpk->x509 != NULL && cpk->privatekey != NULL); 2088 cpk = &(c->pkeys[SSL_PKEY_RSA_SIGN]); 2089 rsa_sign = (cpk->x509 != NULL && cpk->privatekey != NULL); 2090 cpk = &(c->pkeys[SSL_PKEY_DSA_SIGN]); 2091 dsa_sign = (cpk->x509 != NULL && cpk->privatekey != NULL); 2092/* FIX THIS EAY EAY EAY */ 2093 cpk = &(c->pkeys[SSL_PKEY_ECC]); 2094 have_ecc_cert = (cpk->x509 != NULL && cpk->privatekey != NULL); 2095 mask_k = 0; 2096 mask_a = 0; 2097 2098 cpk = &(c->pkeys[SSL_PKEY_GOST01]); 2099 if (cpk->x509 != NULL && cpk->privatekey !=NULL) { 2100 mask_k |= SSL_kGOST; 2101 mask_a |= SSL_aGOST01; 2102 } 2103 2104 if (rsa_enc) 2105 mask_k|=SSL_kRSA; 2106 2107 if (dh_tmp) 2108 mask_k|=SSL_kDHE; 2109 2110 if (rsa_enc || rsa_sign) 2111 mask_a|=SSL_aRSA; 2112 2113 if (dsa_sign) 2114 mask_a|=SSL_aDSS; 2115 2116 mask_a|=SSL_aNULL; 2117 2118 /* 2119 * An ECC certificate may be usable for ECDH and/or 2120 * ECDSA cipher suites depending on the key usage extension. 2121 */ 2122 if (have_ecc_cert) { 2123 x = (c->pkeys[SSL_PKEY_ECC]).x509; 2124 2125 /* This call populates extension flags (ex_flags). */ 2126 X509_check_purpose(x, -1, 0); 2127 2128 /* Key usage, if present, must allow signing. */ 2129 if ((x->ex_flags & EXFLAG_KUSAGE) == 0 || 2130 (x->ex_kusage & X509v3_KU_DIGITAL_SIGNATURE)) 2131 mask_a|=SSL_aECDSA; 2132 } 2133 2134 if (have_ecdh_tmp) 2135 mask_k|=SSL_kECDHE; 2136 2137 c->mask_k = mask_k; 2138 c->mask_a = mask_a; 2139 c->valid = 1; 2140} 2141 2142int 2143ssl_check_srvr_ecc_cert_and_alg(X509 *x, SSL *s) 2144{ 2145 const SSL_CIPHER *cs = S3I(s)->tmp.new_cipher; 2146 unsigned long alg_a; 2147 2148 alg_a = cs->algorithm_auth; 2149 2150 if (alg_a & SSL_aECDSA) { 2151 /* This call populates extension flags (ex_flags). */ 2152 X509_check_purpose(x, -1, 0); 2153 2154 /* Key usage, if present, must allow signing. */ 2155 if ((x->ex_flags & EXFLAG_KUSAGE) && 2156 ((x->ex_kusage & X509v3_KU_DIGITAL_SIGNATURE) == 0)) { 2157 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, 2158 SSL_R_ECC_CERT_NOT_FOR_SIGNING); 2159 return (0); 2160 } 2161 } 2162 2163 return (1); 2164} 2165 2166CERT_PKEY * 2167ssl_get_server_send_pkey(const SSL *s) 2168{ 2169 unsigned long alg_a; 2170 CERT *c; 2171 int i; 2172 2173 c = s->cert; 2174 ssl_set_cert_masks(c, S3I(s)->tmp.new_cipher); 2175 2176 alg_a = S3I(s)->tmp.new_cipher->algorithm_auth; 2177 2178 if (alg_a & SSL_aECDSA) { 2179 i = SSL_PKEY_ECC; 2180 } else if (alg_a & SSL_aDSS) { 2181 i = SSL_PKEY_DSA_SIGN; 2182 } else if (alg_a & SSL_aRSA) { 2183 if (c->pkeys[SSL_PKEY_RSA_ENC].x509 == NULL) 2184 i = SSL_PKEY_RSA_SIGN; 2185 else 2186 i = SSL_PKEY_RSA_ENC; 2187 } else if (alg_a & SSL_aGOST01) { 2188 i = SSL_PKEY_GOST01; 2189 } else { /* if (alg_a & SSL_aNULL) */ 2190 SSLerr(SSL_F_SSL_GET_SERVER_SEND_PKEY, ERR_R_INTERNAL_ERROR); 2191 return (NULL); 2192 } 2193 2194 return (c->pkeys + i); 2195} 2196 2197X509 * 2198ssl_get_server_send_cert(const SSL *s) 2199{ 2200 CERT_PKEY *cpk; 2201 2202 cpk = ssl_get_server_send_pkey(s); 2203 if (!cpk) 2204 return (NULL); 2205 return (cpk->x509); 2206} 2207 2208EVP_PKEY * 2209ssl_get_sign_pkey(SSL *s, const SSL_CIPHER *cipher, const EVP_MD **pmd) 2210{ 2211 unsigned long alg_a; 2212 CERT *c; 2213 int idx = -1; 2214 2215 alg_a = cipher->algorithm_auth; 2216 c = s->cert; 2217 2218 if ((alg_a & SSL_aDSS) && 2219 (c->pkeys[SSL_PKEY_DSA_SIGN].privatekey != NULL)) 2220 idx = SSL_PKEY_DSA_SIGN; 2221 else if (alg_a & SSL_aRSA) { 2222 if (c->pkeys[SSL_PKEY_RSA_SIGN].privatekey != NULL) 2223 idx = SSL_PKEY_RSA_SIGN; 2224 else if (c->pkeys[SSL_PKEY_RSA_ENC].privatekey != NULL) 2225 idx = SSL_PKEY_RSA_ENC; 2226 } else if ((alg_a & SSL_aECDSA) && 2227 (c->pkeys[SSL_PKEY_ECC].privatekey != NULL)) 2228 idx = SSL_PKEY_ECC; 2229 if (idx == -1) { 2230 SSLerr(SSL_F_SSL_GET_SIGN_PKEY, ERR_R_INTERNAL_ERROR); 2231 return (NULL); 2232 } 2233 if (pmd) 2234 *pmd = c->pkeys[idx].digest; 2235 return (c->pkeys[idx].privatekey); 2236} 2237 2238DH * 2239ssl_get_auto_dh(SSL *s) 2240{ 2241 CERT_PKEY *cpk; 2242 int keylen; 2243 DH *dhp; 2244 2245 if (s->cert->dh_tmp_auto == 2) { 2246 keylen = 1024; 2247 } else if (S3I(s)->tmp.new_cipher->algorithm_auth & SSL_aNULL) { 2248 keylen = 1024; 2249 if (S3I(s)->tmp.new_cipher->strength_bits == 256) 2250 keylen = 3072; 2251 } else { 2252 if ((cpk = ssl_get_server_send_pkey(s)) == NULL) 2253 return (NULL); 2254 if (cpk->privatekey == NULL || cpk->privatekey->pkey.dh == NULL) 2255 return (NULL); 2256 keylen = EVP_PKEY_bits(cpk->privatekey); 2257 } 2258 2259 if ((dhp = DH_new()) == NULL) 2260 return (NULL); 2261 2262 dhp->g = BN_new(); 2263 if (dhp->g != NULL) 2264 BN_set_word(dhp->g, 2); 2265 2266 if (keylen >= 8192) 2267 dhp->p = get_rfc3526_prime_8192(NULL); 2268 else if (keylen >= 4096) 2269 dhp->p = get_rfc3526_prime_4096(NULL); 2270 else if (keylen >= 3072) 2271 dhp->p = get_rfc3526_prime_3072(NULL); 2272 else if (keylen >= 2048) 2273 dhp->p = get_rfc3526_prime_2048(NULL); 2274 else if (keylen >= 1536) 2275 dhp->p = get_rfc3526_prime_1536(NULL); 2276 else 2277 dhp->p = get_rfc2409_prime_1024(NULL); 2278 2279 if (dhp->p == NULL || dhp->g == NULL) { 2280 DH_free(dhp); 2281 return (NULL); 2282 } 2283 return (dhp); 2284} 2285 2286void 2287ssl_update_cache(SSL *s, int mode) 2288{ 2289 int i; 2290 2291 /* 2292 * If the session_id_length is 0, we are not supposed to cache it, 2293 * and it would be rather hard to do anyway :-) 2294 */ 2295 if (s->session->session_id_length == 0) 2296 return; 2297 2298 i = s->session_ctx->internal->session_cache_mode; 2299 if ((i & mode) && (!s->internal->hit) && ((i & SSL_SESS_CACHE_NO_INTERNAL_STORE) 2300 || SSL_CTX_add_session(s->session_ctx, s->session)) 2301 && (s->session_ctx->internal->new_session_cb != NULL)) { 2302 CRYPTO_add(&s->session->references, 1, CRYPTO_LOCK_SSL_SESSION); 2303 if (!s->session_ctx->internal->new_session_cb(s, s->session)) 2304 SSL_SESSION_free(s->session); 2305 } 2306 2307 /* auto flush every 255 connections */ 2308 if ((!(i & SSL_SESS_CACHE_NO_AUTO_CLEAR)) && 2309 ((i & mode) == mode)) { 2310 if ((((mode & SSL_SESS_CACHE_CLIENT) ? 2311 s->session_ctx->internal->stats.sess_connect_good : 2312 s->session_ctx->internal->stats.sess_accept_good) & 0xff) == 0xff) { 2313 SSL_CTX_flush_sessions(s->session_ctx, time(NULL)); 2314 } 2315 } 2316} 2317 2318const SSL_METHOD * 2319SSL_get_ssl_method(SSL *s) 2320{ 2321 return (s->method); 2322} 2323 2324int 2325SSL_set_ssl_method(SSL *s, const SSL_METHOD *meth) 2326{ 2327 int conn = -1; 2328 int ret = 1; 2329 2330 if (s->method != meth) { 2331 if (s->internal->handshake_func != NULL) 2332 conn = (s->internal->handshake_func == s->method->internal->ssl_connect); 2333 2334 if (s->method->internal->version == meth->internal->version) 2335 s->method = meth; 2336 else { 2337 s->method->internal->ssl_free(s); 2338 s->method = meth; 2339 ret = s->method->internal->ssl_new(s); 2340 } 2341 2342 if (conn == 1) 2343 s->internal->handshake_func = meth->internal->ssl_connect; 2344 else if (conn == 0) 2345 s->internal->handshake_func = meth->internal->ssl_accept; 2346 } 2347 return (ret); 2348} 2349 2350int 2351SSL_get_error(const SSL *s, int i) 2352{ 2353 int reason; 2354 unsigned long l; 2355 BIO *bio; 2356 2357 if (i > 0) 2358 return (SSL_ERROR_NONE); 2359 2360 /* Make things return SSL_ERROR_SYSCALL when doing SSL_do_handshake 2361 * etc, where we do encode the error */ 2362 if ((l = ERR_peek_error()) != 0) { 2363 if (ERR_GET_LIB(l) == ERR_LIB_SYS) 2364 return (SSL_ERROR_SYSCALL); 2365 else 2366 return (SSL_ERROR_SSL); 2367 } 2368 2369 if ((i < 0) && SSL_want_read(s)) { 2370 bio = SSL_get_rbio(s); 2371 if (BIO_should_read(bio)) { 2372 return (SSL_ERROR_WANT_READ); 2373 } else if (BIO_should_write(bio)) { 2374 /* 2375 * This one doesn't make too much sense... We never 2376 * try to write to the rbio, and an application 2377 * program where rbio and wbio are separate couldn't 2378 * even know what it should wait for. However if we 2379 * ever set s->internal->rwstate incorrectly (so that we have 2380 * SSL_want_read(s) instead of SSL_want_write(s)) 2381 * and rbio and wbio *are* the same, this test works 2382 * around that bug; so it might be safer to keep it. 2383 */ 2384 return (SSL_ERROR_WANT_WRITE); 2385 } else if (BIO_should_io_special(bio)) { 2386 reason = BIO_get_retry_reason(bio); 2387 if (reason == BIO_RR_CONNECT) 2388 return (SSL_ERROR_WANT_CONNECT); 2389 else if (reason == BIO_RR_ACCEPT) 2390 return (SSL_ERROR_WANT_ACCEPT); 2391 else 2392 return (SSL_ERROR_SYSCALL); /* unknown */ 2393 } 2394 } 2395 2396 if ((i < 0) && SSL_want_write(s)) { 2397 bio = SSL_get_wbio(s); 2398 if (BIO_should_write(bio)) { 2399 return (SSL_ERROR_WANT_WRITE); 2400 } else if (BIO_should_read(bio)) { 2401 /* 2402 * See above (SSL_want_read(s) with 2403 * BIO_should_write(bio)) 2404 */ 2405 return (SSL_ERROR_WANT_READ); 2406 } else if (BIO_should_io_special(bio)) { 2407 reason = BIO_get_retry_reason(bio); 2408 if (reason == BIO_RR_CONNECT) 2409 return (SSL_ERROR_WANT_CONNECT); 2410 else if (reason == BIO_RR_ACCEPT) 2411 return (SSL_ERROR_WANT_ACCEPT); 2412 else 2413 return (SSL_ERROR_SYSCALL); 2414 } 2415 } 2416 if ((i < 0) && SSL_want_x509_lookup(s)) { 2417 return (SSL_ERROR_WANT_X509_LOOKUP); 2418 } 2419 2420 if (i == 0) { 2421 if ((s->internal->shutdown & SSL_RECEIVED_SHUTDOWN) && 2422 (S3I(s)->warn_alert == SSL_AD_CLOSE_NOTIFY)) 2423 return (SSL_ERROR_ZERO_RETURN); 2424 } 2425 return (SSL_ERROR_SYSCALL); 2426} 2427 2428int 2429SSL_do_handshake(SSL *s) 2430{ 2431 int ret = 1; 2432 2433 if (s->internal->handshake_func == NULL) { 2434 SSLerr(SSL_F_SSL_DO_HANDSHAKE, SSL_R_CONNECTION_TYPE_NOT_SET); 2435 return (-1); 2436 } 2437 2438 s->method->internal->ssl_renegotiate_check(s); 2439 2440 if (SSL_in_init(s) || SSL_in_before(s)) { 2441 ret = s->internal->handshake_func(s); 2442 } 2443 return (ret); 2444} 2445 2446/* 2447 * For the next 2 functions, SSL_clear() sets shutdown and so 2448 * one of these calls will reset it 2449 */ 2450void 2451SSL_set_accept_state(SSL *s) 2452{ 2453 s->server = 1; 2454 s->internal->shutdown = 0; 2455 s->internal->state = SSL_ST_ACCEPT|SSL_ST_BEFORE; 2456 s->internal->handshake_func = s->method->internal->ssl_accept; 2457 /* clear the current cipher */ 2458 ssl_clear_cipher_ctx(s); 2459 ssl_clear_hash_ctx(&s->read_hash); 2460 ssl_clear_hash_ctx(&s->internal->write_hash); 2461} 2462 2463void 2464SSL_set_connect_state(SSL *s) 2465{ 2466 s->server = 0; 2467 s->internal->shutdown = 0; 2468 s->internal->state = SSL_ST_CONNECT|SSL_ST_BEFORE; 2469 s->internal->handshake_func = s->method->internal->ssl_connect; 2470 /* clear the current cipher */ 2471 ssl_clear_cipher_ctx(s); 2472 ssl_clear_hash_ctx(&s->read_hash); 2473 ssl_clear_hash_ctx(&s->internal->write_hash); 2474} 2475 2476int 2477ssl_undefined_function(SSL *s) 2478{ 2479 SSLerr(SSL_F_SSL_UNDEFINED_FUNCTION, 2480 ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); 2481 return (0); 2482} 2483 2484int 2485ssl_undefined_void_function(void) 2486{ 2487 SSLerr(SSL_F_SSL_UNDEFINED_VOID_FUNCTION, 2488 ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); 2489 return (0); 2490} 2491 2492int 2493ssl_undefined_const_function(const SSL *s) 2494{ 2495 SSLerr(SSL_F_SSL_UNDEFINED_CONST_FUNCTION, 2496 ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); 2497 return (0); 2498} 2499 2500const char * 2501ssl_version_string(int ver) 2502{ 2503 switch (ver) { 2504 case DTLS1_VERSION: 2505 return (SSL_TXT_DTLS1); 2506 case TLS1_VERSION: 2507 return (SSL_TXT_TLSV1); 2508 case TLS1_1_VERSION: 2509 return (SSL_TXT_TLSV1_1); 2510 case TLS1_2_VERSION: 2511 return (SSL_TXT_TLSV1_2); 2512 default: 2513 return ("unknown"); 2514 } 2515} 2516 2517const char * 2518SSL_get_version(const SSL *s) 2519{ 2520 return ssl_version_string(s->version); 2521} 2522 2523int 2524ssl_enabled_version_range(SSL *s, uint16_t *min_ver, uint16_t *max_ver) 2525{ 2526 uint16_t min_version, max_version; 2527 2528 /* 2529 * The enabled versions have to be a contiguous range, which means we 2530 * cannot enable and disable single versions at our whim, even though 2531 * this is what the OpenSSL flags allow. The historical way this has 2532 * been handled is by making a flag mean that all higher versions 2533 * are disabled, if any version lower than the flag is enabled. 2534 */ 2535 2536 min_version = 0; 2537 max_version = TLS1_2_VERSION; 2538 2539 if ((s->internal->options & SSL_OP_NO_TLSv1) == 0) 2540 min_version = TLS1_VERSION; 2541 else if ((s->internal->options & SSL_OP_NO_TLSv1_1) == 0) 2542 min_version = TLS1_1_VERSION; 2543 else if ((s->internal->options & SSL_OP_NO_TLSv1_2) == 0) 2544 min_version = TLS1_2_VERSION; 2545 2546 if ((s->internal->options & SSL_OP_NO_TLSv1_2) && min_version < TLS1_2_VERSION) 2547 max_version = TLS1_1_VERSION; 2548 if ((s->internal->options & SSL_OP_NO_TLSv1_1) && min_version < TLS1_1_VERSION) 2549 max_version = TLS1_VERSION; 2550 if ((s->internal->options & SSL_OP_NO_TLSv1) && min_version < TLS1_VERSION) 2551 max_version = 0; 2552 2553 /* Everything has been disabled... */ 2554 if (min_version == 0 || max_version == 0) 2555 return 0; 2556 2557 if (min_ver != NULL) 2558 *min_ver = min_version; 2559 if (max_ver != NULL) 2560 *max_ver = max_version; 2561 2562 return 1; 2563} 2564 2565int 2566ssl_max_shared_version(SSL *s, uint16_t peer_ver, uint16_t *max_ver) 2567{ 2568 uint16_t min_version, max_version, shared_version; 2569 2570 *max_ver = 0; 2571 2572 if (peer_ver >= TLS1_2_VERSION) 2573 shared_version = TLS1_2_VERSION; 2574 else if (peer_ver >= TLS1_1_VERSION) 2575 shared_version = TLS1_1_VERSION; 2576 else if (peer_ver >= TLS1_VERSION) 2577 shared_version = TLS1_VERSION; 2578 else 2579 return 0; 2580 2581 if (!ssl_enabled_version_range(s, &min_version, &max_version)) 2582 return 0; 2583 2584 if (shared_version < min_version) 2585 return 0; 2586 2587 if (shared_version > max_version) 2588 shared_version = max_version; 2589 2590 *max_ver = shared_version; 2591 2592 return 1; 2593} 2594 2595uint16_t 2596ssl_max_server_version(SSL *s) 2597{ 2598 uint16_t max_version; 2599 2600 /* 2601 * The SSL method will be changed during version negotiation, as such 2602 * we want to use the SSL method from the context. 2603 */ 2604 max_version = s->ctx->method->internal->version; 2605 2606 if (SSL_IS_DTLS(s)) 2607 return (DTLS1_VERSION); 2608 2609 if ((s->internal->options & SSL_OP_NO_TLSv1_2) == 0 && 2610 max_version >= TLS1_2_VERSION) 2611 return (TLS1_2_VERSION); 2612 if ((s->internal->options & SSL_OP_NO_TLSv1_1) == 0 && 2613 max_version >= TLS1_1_VERSION) 2614 return (TLS1_1_VERSION); 2615 if ((s->internal->options & SSL_OP_NO_TLSv1) == 0 && 2616 max_version >= TLS1_VERSION) 2617 return (TLS1_VERSION); 2618 2619 return (0); 2620} 2621 2622SSL * 2623SSL_dup(SSL *s) 2624{ 2625 STACK_OF(X509_NAME) *sk; 2626 X509_NAME *xn; 2627 SSL *ret; 2628 int i; 2629 2630 if ((ret = SSL_new(SSL_get_SSL_CTX(s))) == NULL) 2631 return (NULL); 2632 2633 ret->version = s->version; 2634 ret->internal->type = s->internal->type; 2635 ret->method = s->method; 2636 2637 if (s->session != NULL) { 2638 /* This copies session-id, SSL_METHOD, sid_ctx, and 'cert' */ 2639 SSL_copy_session_id(ret, s); 2640 } else { 2641 /* 2642 * No session has been established yet, so we have to expect 2643 * that s->cert or ret->cert will be changed later -- 2644 * they should not both point to the same object, 2645 * and thus we can't use SSL_copy_session_id. 2646 */ 2647 2648 ret->method->internal->ssl_free(ret); 2649 ret->method = s->method; 2650 ret->method->internal->ssl_new(ret); 2651 2652 if (s->cert != NULL) { 2653 ssl_cert_free(ret->cert); 2654 ret->cert = ssl_cert_dup(s->cert); 2655 if (ret->cert == NULL) 2656 goto err; 2657 } 2658 2659 SSL_set_session_id_context(ret, 2660 s->sid_ctx, s->sid_ctx_length); 2661 } 2662 2663 ret->internal->options = s->internal->options; 2664 ret->internal->mode = s->internal->mode; 2665 SSL_set_max_cert_list(ret, SSL_get_max_cert_list(s)); 2666 SSL_set_read_ahead(ret, SSL_get_read_ahead(s)); 2667 ret->internal->msg_callback = s->internal->msg_callback; 2668 ret->internal->msg_callback_arg = s->internal->msg_callback_arg; 2669 SSL_set_verify(ret, SSL_get_verify_mode(s), 2670 SSL_get_verify_callback(s)); 2671 SSL_set_verify_depth(ret, SSL_get_verify_depth(s)); 2672 ret->internal->generate_session_id = s->internal->generate_session_id; 2673 2674 SSL_set_info_callback(ret, SSL_get_info_callback(s)); 2675 2676 ret->internal->debug = s->internal->debug; 2677 2678 /* copy app data, a little dangerous perhaps */ 2679 if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_SSL, 2680 &ret->internal->ex_data, &s->internal->ex_data)) 2681 goto err; 2682 2683 /* setup rbio, and wbio */ 2684 if (s->rbio != NULL) { 2685 if (!BIO_dup_state(s->rbio,(char *)&ret->rbio)) 2686 goto err; 2687 } 2688 if (s->wbio != NULL) { 2689 if (s->wbio != s->rbio) { 2690 if (!BIO_dup_state(s->wbio,(char *)&ret->wbio)) 2691 goto err; 2692 } else 2693 ret->wbio = ret->rbio; 2694 } 2695 ret->internal->rwstate = s->internal->rwstate; 2696 ret->internal->in_handshake = s->internal->in_handshake; 2697 ret->internal->handshake_func = s->internal->handshake_func; 2698 ret->server = s->server; 2699 ret->internal->renegotiate = s->internal->renegotiate; 2700 ret->internal->new_session = s->internal->new_session; 2701 ret->internal->quiet_shutdown = s->internal->quiet_shutdown; 2702 ret->internal->shutdown = s->internal->shutdown; 2703 /* SSL_dup does not really work at any state, though */ 2704 ret->internal->state = s->internal->state; 2705 ret->internal->rstate = s->internal->rstate; 2706 2707 /* 2708 * Would have to copy ret->init_buf, ret->init_msg, ret->init_num, 2709 * ret->init_off 2710 */ 2711 ret->internal->init_num = 0; 2712 2713 ret->internal->hit = s->internal->hit; 2714 2715 X509_VERIFY_PARAM_inherit(ret->param, s->param); 2716 2717 /* dup the cipher_list and cipher_list_by_id stacks */ 2718 if (s->cipher_list != NULL) { 2719 if ((ret->cipher_list = 2720 sk_SSL_CIPHER_dup(s->cipher_list)) == NULL) 2721 goto err; 2722 } 2723 if (s->internal->cipher_list_by_id != NULL) { 2724 if ((ret->internal->cipher_list_by_id = 2725 sk_SSL_CIPHER_dup(s->internal->cipher_list_by_id)) == NULL) 2726 goto err; 2727 } 2728 2729 /* Dup the client_CA list */ 2730 if (s->internal->client_CA != NULL) { 2731 if ((sk = sk_X509_NAME_dup(s->internal->client_CA)) == NULL) goto err; 2732 ret->internal->client_CA = sk; 2733 for (i = 0; i < sk_X509_NAME_num(sk); i++) { 2734 xn = sk_X509_NAME_value(sk, i); 2735 if (sk_X509_NAME_set(sk, i, 2736 X509_NAME_dup(xn)) == NULL) { 2737 X509_NAME_free(xn); 2738 goto err; 2739 } 2740 } 2741 } 2742 2743 if (0) { 2744err: 2745 if (ret != NULL) 2746 SSL_free(ret); 2747 ret = NULL; 2748 } 2749 return (ret); 2750} 2751 2752void 2753ssl_clear_cipher_ctx(SSL *s) 2754{ 2755 EVP_CIPHER_CTX_free(s->enc_read_ctx); 2756 s->enc_read_ctx = NULL; 2757 EVP_CIPHER_CTX_free(s->internal->enc_write_ctx); 2758 s->internal->enc_write_ctx = NULL; 2759 2760 if (s->internal->aead_read_ctx != NULL) { 2761 EVP_AEAD_CTX_cleanup(&s->internal->aead_read_ctx->ctx); 2762 free(s->internal->aead_read_ctx); 2763 s->internal->aead_read_ctx = NULL; 2764 } 2765 if (s->internal->aead_write_ctx != NULL) { 2766 EVP_AEAD_CTX_cleanup(&s->internal->aead_write_ctx->ctx); 2767 free(s->internal->aead_write_ctx); 2768 s->internal->aead_write_ctx = NULL; 2769 } 2770 2771} 2772 2773/* Fix this function so that it takes an optional type parameter */ 2774X509 * 2775SSL_get_certificate(const SSL *s) 2776{ 2777 if (s->cert != NULL) 2778 return (s->cert->key->x509); 2779 else 2780 return (NULL); 2781} 2782 2783/* Fix this function so that it takes an optional type parameter */ 2784EVP_PKEY * 2785SSL_get_privatekey(SSL *s) 2786{ 2787 if (s->cert != NULL) 2788 return (s->cert->key->privatekey); 2789 else 2790 return (NULL); 2791} 2792 2793const SSL_CIPHER * 2794SSL_get_current_cipher(const SSL *s) 2795{ 2796 if ((s->session != NULL) && (s->session->cipher != NULL)) 2797 return (s->session->cipher); 2798 return (NULL); 2799} 2800const void * 2801SSL_get_current_compression(SSL *s) 2802{ 2803 return (NULL); 2804} 2805 2806const void * 2807SSL_get_current_expansion(SSL *s) 2808{ 2809 return (NULL); 2810} 2811 2812int 2813ssl_init_wbio_buffer(SSL *s, int push) 2814{ 2815 BIO *bbio; 2816 2817 if (s->bbio == NULL) { 2818 bbio = BIO_new(BIO_f_buffer()); 2819 if (bbio == NULL) 2820 return (0); 2821 s->bbio = bbio; 2822 } else { 2823 bbio = s->bbio; 2824 if (s->bbio == s->wbio) 2825 s->wbio = BIO_pop(s->wbio); 2826 } 2827 (void)BIO_reset(bbio); 2828/* if (!BIO_set_write_buffer_size(bbio,16*1024)) */ 2829 if (!BIO_set_read_buffer_size(bbio, 1)) { 2830 SSLerr(SSL_F_SSL_INIT_WBIO_BUFFER, ERR_R_BUF_LIB); 2831 return (0); 2832 } 2833 if (push) { 2834 if (s->wbio != bbio) 2835 s->wbio = BIO_push(bbio, s->wbio); 2836 } else { 2837 if (s->wbio == bbio) 2838 s->wbio = BIO_pop(bbio); 2839 } 2840 return (1); 2841} 2842 2843void 2844ssl_free_wbio_buffer(SSL *s) 2845{ 2846 if (s == NULL) 2847 return; 2848 2849 if (s->bbio == NULL) 2850 return; 2851 2852 if (s->bbio == s->wbio) { 2853 /* remove buffering */ 2854 s->wbio = BIO_pop(s->wbio); 2855 } 2856 BIO_free(s->bbio); 2857 s->bbio = NULL; 2858} 2859 2860void 2861SSL_CTX_set_quiet_shutdown(SSL_CTX *ctx, int mode) 2862{ 2863 ctx->internal->quiet_shutdown = mode; 2864} 2865 2866int 2867SSL_CTX_get_quiet_shutdown(const SSL_CTX *ctx) 2868{ 2869 return (ctx->internal->quiet_shutdown); 2870} 2871 2872void 2873SSL_set_quiet_shutdown(SSL *s, int mode) 2874{ 2875 s->internal->quiet_shutdown = mode; 2876} 2877 2878int 2879SSL_get_quiet_shutdown(const SSL *s) 2880{ 2881 return (s->internal->quiet_shutdown); 2882} 2883 2884void 2885SSL_set_shutdown(SSL *s, int mode) 2886{ 2887 s->internal->shutdown = mode; 2888} 2889 2890int 2891SSL_get_shutdown(const SSL *s) 2892{ 2893 return (s->internal->shutdown); 2894} 2895 2896int 2897SSL_version(const SSL *s) 2898{ 2899 return (s->version); 2900} 2901 2902SSL_CTX * 2903SSL_get_SSL_CTX(const SSL *ssl) 2904{ 2905 return (ssl->ctx); 2906} 2907 2908SSL_CTX * 2909SSL_set_SSL_CTX(SSL *ssl, SSL_CTX* ctx) 2910{ 2911 CERT *ocert = ssl->cert; 2912 2913 if (ssl->ctx == ctx) 2914 return (ssl->ctx); 2915 if (ctx == NULL) 2916 ctx = ssl->initial_ctx; 2917 ssl->cert = ssl_cert_dup(ctx->internal->cert); 2918 if (ocert != NULL) { 2919 int i; 2920 /* Copy negotiated digests from original certificate. */ 2921 for (i = 0; i < SSL_PKEY_NUM; i++) 2922 ssl->cert->pkeys[i].digest = ocert->pkeys[i].digest; 2923 ssl_cert_free(ocert); 2924 } 2925 CRYPTO_add(&ctx->references, 1, CRYPTO_LOCK_SSL_CTX); 2926 SSL_CTX_free(ssl->ctx); /* decrement reference count */ 2927 ssl->ctx = ctx; 2928 return (ssl->ctx); 2929} 2930 2931int 2932SSL_CTX_set_default_verify_paths(SSL_CTX *ctx) 2933{ 2934 return (X509_STORE_set_default_paths(ctx->cert_store)); 2935} 2936 2937int 2938SSL_CTX_load_verify_locations(SSL_CTX *ctx, const char *CAfile, 2939 const char *CApath) 2940{ 2941 return (X509_STORE_load_locations(ctx->cert_store, CAfile, CApath)); 2942} 2943 2944int 2945SSL_CTX_load_verify_mem(SSL_CTX *ctx, void *buf, int len) 2946{ 2947 return (X509_STORE_load_mem(ctx->cert_store, buf, len)); 2948} 2949 2950void 2951SSL_set_info_callback(SSL *ssl, void (*cb)(const SSL *ssl, int type, int val)) 2952{ 2953 ssl->internal->info_callback = cb; 2954} 2955 2956void (*SSL_get_info_callback(const SSL *ssl))(const SSL *ssl, int type, int val) 2957{ 2958 return (ssl->internal->info_callback); 2959} 2960 2961int 2962SSL_state(const SSL *ssl) 2963{ 2964 return (ssl->internal->state); 2965} 2966 2967void 2968SSL_set_state(SSL *ssl, int state) 2969{ 2970 ssl->internal->state = state; 2971} 2972 2973void 2974SSL_set_verify_result(SSL *ssl, long arg) 2975{ 2976 ssl->verify_result = arg; 2977} 2978 2979long 2980SSL_get_verify_result(const SSL *ssl) 2981{ 2982 return (ssl->verify_result); 2983} 2984 2985int 2986SSL_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func, 2987 CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func) 2988{ 2989 return (CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL, argl, argp, 2990 new_func, dup_func, free_func)); 2991} 2992 2993int 2994SSL_set_ex_data(SSL *s, int idx, void *arg) 2995{ 2996 return (CRYPTO_set_ex_data(&s->internal->ex_data, idx, arg)); 2997} 2998 2999void * 3000SSL_get_ex_data(const SSL *s, int idx) 3001{ 3002 return (CRYPTO_get_ex_data(&s->internal->ex_data, idx)); 3003} 3004 3005int 3006SSL_CTX_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func, 3007 CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func) 3008{ 3009 return (CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL_CTX, argl, argp, 3010 new_func, dup_func, free_func)); 3011} 3012 3013int 3014SSL_CTX_set_ex_data(SSL_CTX *s, int idx, void *arg) 3015{ 3016 return (CRYPTO_set_ex_data(&s->internal->ex_data, idx, arg)); 3017} 3018 3019void * 3020SSL_CTX_get_ex_data(const SSL_CTX *s, int idx) 3021{ 3022 return (CRYPTO_get_ex_data(&s->internal->ex_data, idx)); 3023} 3024 3025int 3026ssl_ok(SSL *s) 3027{ 3028 return (1); 3029} 3030 3031X509_STORE * 3032SSL_CTX_get_cert_store(const SSL_CTX *ctx) 3033{ 3034 return (ctx->cert_store); 3035} 3036 3037void 3038SSL_CTX_set_cert_store(SSL_CTX *ctx, X509_STORE *store) 3039{ 3040 if (ctx->cert_store != NULL) 3041 X509_STORE_free(ctx->cert_store); 3042 ctx->cert_store = store; 3043} 3044 3045int 3046SSL_want(const SSL *s) 3047{ 3048 return (s->internal->rwstate); 3049} 3050 3051void 3052SSL_CTX_set_tmp_rsa_callback(SSL_CTX *ctx, RSA *(*cb)(SSL *ssl, int is_export, 3053 int keylength)) 3054{ 3055 SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb); 3056} 3057 3058void 3059SSL_set_tmp_rsa_callback(SSL *ssl, RSA *(*cb)(SSL *ssl, int is_export, 3060 int keylength)) 3061{ 3062 SSL_callback_ctrl(ssl, SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb); 3063} 3064 3065void 3066SSL_CTX_set_tmp_dh_callback(SSL_CTX *ctx, DH *(*dh)(SSL *ssl, int is_export, 3067 int keylength)) 3068{ 3069 SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh); 3070} 3071 3072void 3073SSL_set_tmp_dh_callback(SSL *ssl, DH *(*dh)(SSL *ssl, int is_export, 3074 int keylength)) 3075{ 3076 SSL_callback_ctrl(ssl, SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh); 3077} 3078 3079void 3080SSL_CTX_set_tmp_ecdh_callback(SSL_CTX *ctx, EC_KEY *(*ecdh)(SSL *ssl, 3081 int is_export, int keylength)) 3082{ 3083 SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_TMP_ECDH_CB, 3084 (void (*)(void))ecdh); 3085} 3086 3087void 3088SSL_set_tmp_ecdh_callback(SSL *ssl, EC_KEY *(*ecdh)(SSL *ssl, int is_export, 3089 int keylength)) 3090{ 3091 SSL_callback_ctrl(ssl, SSL_CTRL_SET_TMP_ECDH_CB,(void (*)(void))ecdh); 3092} 3093 3094 3095void 3096SSL_CTX_set_msg_callback(SSL_CTX *ctx, void (*cb)(int write_p, int version, 3097 int content_type, const void *buf, size_t len, SSL *ssl, void *arg)) 3098{ 3099 SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_MSG_CALLBACK, 3100 (void (*)(void))cb); 3101} 3102 3103void 3104SSL_set_msg_callback(SSL *ssl, void (*cb)(int write_p, int version, 3105 int content_type, const void *buf, size_t len, SSL *ssl, void *arg)) 3106{ 3107 SSL_callback_ctrl(ssl, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb); 3108} 3109 3110void 3111ssl_clear_hash_ctx(EVP_MD_CTX **hash) 3112{ 3113 if (*hash) 3114 EVP_MD_CTX_destroy(*hash); 3115 *hash = NULL; 3116} 3117 3118void 3119SSL_set_debug(SSL *s, int debug) 3120{ 3121 s->internal->debug = debug; 3122} 3123 3124int 3125SSL_cache_hit(SSL *s) 3126{ 3127 return (s->internal->hit); 3128} 3129 3130 3131static int 3132ssl_cipher_id_cmp_BSEARCH_CMP_FN(const void *a_, const void *b_) 3133{ 3134 SSL_CIPHER const *a = a_; 3135 SSL_CIPHER const *b = b_; 3136 return ssl_cipher_id_cmp(a, b); 3137} 3138 3139SSL_CIPHER * 3140OBJ_bsearch_ssl_cipher_id(SSL_CIPHER *key, SSL_CIPHER const *base, int num) 3141{ 3142 return (SSL_CIPHER *)OBJ_bsearch_(key, base, num, sizeof(SSL_CIPHER), 3143 ssl_cipher_id_cmp_BSEARCH_CMP_FN); 3144} 3145