ssl_lib.c revision 1.150
1/* $OpenBSD: ssl_lib.c,v 1.150 2017/01/25 10:54:23 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->min_version = ctx->internal->min_version; 288 s->internal->max_version = ctx->internal->max_version; 289 290 s->internal->options = ctx->internal->options; 291 s->internal->mode = ctx->internal->mode; 292 s->internal->max_cert_list = ctx->internal->max_cert_list; 293 294 if (ctx->internal->cert != NULL) { 295 /* 296 * Earlier library versions used to copy the pointer to 297 * the CERT, not its contents; only when setting new 298 * parameters for the per-SSL copy, ssl_cert_new would be 299 * called (and the direct reference to the per-SSL_CTX 300 * settings would be lost, but those still were indirectly 301 * accessed for various purposes, and for that reason they 302 * used to be known as s->ctx->default_cert). 303 * Now we don't look at the SSL_CTX's CERT after having 304 * duplicated it once. 305 */ 306 s->cert = ssl_cert_dup(ctx->internal->cert); 307 if (s->cert == NULL) 308 goto err; 309 } else 310 s->cert=NULL; /* Cannot really happen (see SSL_CTX_new) */ 311 312 s->internal->read_ahead = ctx->internal->read_ahead; 313 s->internal->msg_callback = ctx->internal->msg_callback; 314 s->internal->msg_callback_arg = ctx->internal->msg_callback_arg; 315 s->verify_mode = ctx->verify_mode; 316 s->sid_ctx_length = ctx->sid_ctx_length; 317 OPENSSL_assert(s->sid_ctx_length <= sizeof s->sid_ctx); 318 memcpy(&s->sid_ctx, &ctx->sid_ctx, sizeof(s->sid_ctx)); 319 s->internal->verify_callback = ctx->internal->default_verify_callback; 320 s->internal->generate_session_id = ctx->internal->generate_session_id; 321 322 s->param = X509_VERIFY_PARAM_new(); 323 if (!s->param) 324 goto err; 325 X509_VERIFY_PARAM_inherit(s->param, ctx->param); 326 s->internal->quiet_shutdown = ctx->internal->quiet_shutdown; 327 s->max_send_fragment = ctx->internal->max_send_fragment; 328 329 CRYPTO_add(&ctx->references, 1, CRYPTO_LOCK_SSL_CTX); 330 s->ctx = ctx; 331 s->internal->tlsext_debug_cb = 0; 332 s->internal->tlsext_debug_arg = NULL; 333 s->internal->tlsext_ticket_expected = 0; 334 s->tlsext_status_type = -1; 335 s->internal->tlsext_status_expected = 0; 336 s->internal->tlsext_ocsp_ids = NULL; 337 s->internal->tlsext_ocsp_exts = NULL; 338 s->internal->tlsext_ocsp_resp = NULL; 339 s->internal->tlsext_ocsp_resplen = -1; 340 CRYPTO_add(&ctx->references, 1, CRYPTO_LOCK_SSL_CTX); 341 s->initial_ctx = ctx; 342 343 if (ctx->internal->tlsext_ecpointformatlist != NULL) { 344 s->internal->tlsext_ecpointformatlist = 345 calloc(ctx->internal->tlsext_ecpointformatlist_length, 346 sizeof(ctx->internal->tlsext_ecpointformatlist[0])); 347 if (s->internal->tlsext_ecpointformatlist == NULL) 348 goto err; 349 memcpy(s->internal->tlsext_ecpointformatlist, 350 ctx->internal->tlsext_ecpointformatlist, 351 ctx->internal->tlsext_ecpointformatlist_length * 352 sizeof(ctx->internal->tlsext_ecpointformatlist[0])); 353 s->internal->tlsext_ecpointformatlist_length = 354 ctx->internal->tlsext_ecpointformatlist_length; 355 } 356 if (ctx->internal->tlsext_supportedgroups != NULL) { 357 s->internal->tlsext_supportedgroups = 358 calloc(ctx->internal->tlsext_supportedgroups_length, 359 sizeof(ctx->internal->tlsext_supportedgroups)); 360 if (s->internal->tlsext_supportedgroups == NULL) 361 goto err; 362 memcpy(s->internal->tlsext_supportedgroups, 363 ctx->internal->tlsext_supportedgroups, 364 ctx->internal->tlsext_supportedgroups_length * 365 sizeof(ctx->internal->tlsext_supportedgroups[0])); 366 s->internal->tlsext_supportedgroups_length = 367 ctx->internal->tlsext_supportedgroups_length; 368 } 369 370 s->internal->next_proto_negotiated = NULL; 371 372 if (s->ctx->internal->alpn_client_proto_list != NULL) { 373 s->internal->alpn_client_proto_list = 374 malloc(s->ctx->internal->alpn_client_proto_list_len); 375 if (s->internal->alpn_client_proto_list == NULL) 376 goto err; 377 memcpy(s->internal->alpn_client_proto_list, 378 s->ctx->internal->alpn_client_proto_list, 379 s->ctx->internal->alpn_client_proto_list_len); 380 s->internal->alpn_client_proto_list_len = 381 s->ctx->internal->alpn_client_proto_list_len; 382 } 383 384 s->verify_result = X509_V_OK; 385 386 s->method = ctx->method; 387 388 if (!s->method->internal->ssl_new(s)) 389 goto err; 390 391 s->references = 1; 392 s->server = (ctx->method->internal->ssl_accept == ssl_undefined_function) ? 0 : 1; 393 394 SSL_clear(s); 395 396 CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->internal->ex_data); 397 398 return (s); 399 400 err: 401 SSL_free(s); 402 SSLerr(SSL_F_SSL_NEW, ERR_R_MALLOC_FAILURE); 403 return (NULL); 404} 405 406int 407SSL_CTX_set_session_id_context(SSL_CTX *ctx, const unsigned char *sid_ctx, 408 unsigned int sid_ctx_len) 409{ 410 if (sid_ctx_len > sizeof ctx->sid_ctx) { 411 SSLerr(SSL_F_SSL_CTX_SET_SESSION_ID_CONTEXT, 412 SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG); 413 return (0); 414 } 415 ctx->sid_ctx_length = sid_ctx_len; 416 memcpy(ctx->sid_ctx, sid_ctx, sid_ctx_len); 417 418 return (1); 419} 420 421int 422SSL_set_session_id_context(SSL *ssl, const unsigned char *sid_ctx, 423 unsigned int sid_ctx_len) 424{ 425 if (sid_ctx_len > SSL_MAX_SID_CTX_LENGTH) { 426 SSLerr(SSL_F_SSL_SET_SESSION_ID_CONTEXT, 427 SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG); 428 return (0); 429 } 430 ssl->sid_ctx_length = sid_ctx_len; 431 memcpy(ssl->sid_ctx, sid_ctx, sid_ctx_len); 432 433 return (1); 434} 435 436int 437SSL_CTX_set_generate_session_id(SSL_CTX *ctx, GEN_SESSION_CB cb) 438{ 439 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX); 440 ctx->internal->generate_session_id = cb; 441 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX); 442 return (1); 443} 444 445int 446SSL_set_generate_session_id(SSL *ssl, GEN_SESSION_CB cb) 447{ 448 CRYPTO_w_lock(CRYPTO_LOCK_SSL); 449 ssl->internal->generate_session_id = cb; 450 CRYPTO_w_unlock(CRYPTO_LOCK_SSL); 451 return (1); 452} 453 454int 455SSL_has_matching_session_id(const SSL *ssl, const unsigned char *id, 456 unsigned int id_len) 457{ 458 /* 459 * A quick examination of SSL_SESSION_hash and SSL_SESSION_cmp 460 * shows how we can "construct" a session to give us the desired 461 * check - ie. to find if there's a session in the hash table 462 * that would conflict with any new session built out of this 463 * id/id_len and the ssl_version in use by this SSL. 464 */ 465 SSL_SESSION r, *p; 466 467 if (id_len > sizeof r.session_id) 468 return (0); 469 470 r.ssl_version = ssl->version; 471 r.session_id_length = id_len; 472 memcpy(r.session_id, id, id_len); 473 474 CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX); 475 p = lh_SSL_SESSION_retrieve(ssl->ctx->internal->sessions, &r); 476 CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX); 477 return (p != NULL); 478} 479 480int 481SSL_CTX_set_purpose(SSL_CTX *s, int purpose) 482{ 483 return (X509_VERIFY_PARAM_set_purpose(s->param, purpose)); 484} 485 486int 487SSL_set_purpose(SSL *s, int purpose) 488{ 489 return (X509_VERIFY_PARAM_set_purpose(s->param, purpose)); 490} 491 492int 493SSL_CTX_set_trust(SSL_CTX *s, int trust) 494{ 495 return (X509_VERIFY_PARAM_set_trust(s->param, trust)); 496} 497 498int 499SSL_set_trust(SSL *s, int trust) 500{ 501 return (X509_VERIFY_PARAM_set_trust(s->param, trust)); 502} 503 504int 505SSL_CTX_set1_param(SSL_CTX *ctx, X509_VERIFY_PARAM *vpm) 506{ 507 return (X509_VERIFY_PARAM_set1(ctx->param, vpm)); 508} 509 510int 511SSL_set1_param(SSL *ssl, X509_VERIFY_PARAM *vpm) 512{ 513 return (X509_VERIFY_PARAM_set1(ssl->param, vpm)); 514} 515 516void 517SSL_free(SSL *s) 518{ 519 int i; 520 521 if (s == NULL) 522 return; 523 524 i = CRYPTO_add(&s->references, -1, CRYPTO_LOCK_SSL); 525 if (i > 0) 526 return; 527 528 X509_VERIFY_PARAM_free(s->param); 529 530 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->internal->ex_data); 531 532 if (s->bbio != NULL) { 533 /* If the buffering BIO is in place, pop it off */ 534 if (s->bbio == s->wbio) { 535 s->wbio = BIO_pop(s->wbio); 536 } 537 BIO_free(s->bbio); 538 s->bbio = NULL; 539 } 540 541 if (s->rbio != s->wbio) 542 BIO_free_all(s->rbio); 543 BIO_free_all(s->wbio); 544 545 BUF_MEM_free(s->internal->init_buf); 546 547 /* add extra stuff */ 548 sk_SSL_CIPHER_free(s->cipher_list); 549 sk_SSL_CIPHER_free(s->internal->cipher_list_by_id); 550 551 /* Make the next call work :-) */ 552 if (s->session != NULL) { 553 ssl_clear_bad_session(s); 554 SSL_SESSION_free(s->session); 555 } 556 557 ssl_clear_cipher_ctx(s); 558 ssl_clear_hash_ctx(&s->read_hash); 559 ssl_clear_hash_ctx(&s->internal->write_hash); 560 561 ssl_cert_free(s->cert); 562 563 free(s->tlsext_hostname); 564 SSL_CTX_free(s->initial_ctx); 565 566 free(s->internal->tlsext_ecpointformatlist); 567 free(s->internal->tlsext_supportedgroups); 568 569 sk_X509_EXTENSION_pop_free(s->internal->tlsext_ocsp_exts, 570 X509_EXTENSION_free); 571 sk_OCSP_RESPID_pop_free(s->internal->tlsext_ocsp_ids, OCSP_RESPID_free); 572 free(s->internal->tlsext_ocsp_resp); 573 574 sk_X509_NAME_pop_free(s->internal->client_CA, X509_NAME_free); 575 576 if (s->method != NULL) 577 s->method->internal->ssl_free(s); 578 579 SSL_CTX_free(s->ctx); 580 581 free(s->internal->next_proto_negotiated); 582 free(s->internal->alpn_client_proto_list); 583 584#ifndef OPENSSL_NO_SRTP 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 ret->internal->min_version = meth->internal->min_version; 1849 ret->internal->max_version = meth->internal->max_version; 1850 1851 ret->cert_store = NULL; 1852 ret->internal->session_cache_mode = SSL_SESS_CACHE_SERVER; 1853 ret->internal->session_cache_size = SSL_SESSION_CACHE_MAX_SIZE_DEFAULT; 1854 ret->internal->session_cache_head = NULL; 1855 ret->internal->session_cache_tail = NULL; 1856 1857 /* We take the system default */ 1858 ret->session_timeout = meth->internal->get_timeout(); 1859 1860 ret->internal->new_session_cb = 0; 1861 ret->internal->remove_session_cb = 0; 1862 ret->internal->get_session_cb = 0; 1863 ret->internal->generate_session_id = 0; 1864 1865 memset((char *)&ret->internal->stats, 0, sizeof(ret->internal->stats)); 1866 1867 ret->references = 1; 1868 ret->internal->quiet_shutdown = 0; 1869 1870 ret->internal->info_callback = NULL; 1871 1872 ret->internal->app_verify_callback = 0; 1873 ret->internal->app_verify_arg = NULL; 1874 1875 ret->internal->max_cert_list = SSL_MAX_CERT_LIST_DEFAULT; 1876 ret->internal->read_ahead = 0; 1877 ret->internal->msg_callback = 0; 1878 ret->internal->msg_callback_arg = NULL; 1879 ret->verify_mode = SSL_VERIFY_NONE; 1880 ret->sid_ctx_length = 0; 1881 ret->internal->default_verify_callback = NULL; 1882 if ((ret->internal->cert = ssl_cert_new()) == NULL) 1883 goto err; 1884 1885 ret->default_passwd_callback = 0; 1886 ret->default_passwd_callback_userdata = NULL; 1887 ret->internal->client_cert_cb = 0; 1888 ret->internal->app_gen_cookie_cb = 0; 1889 ret->internal->app_verify_cookie_cb = 0; 1890 1891 ret->internal->sessions = lh_SSL_SESSION_new(); 1892 if (ret->internal->sessions == NULL) 1893 goto err; 1894 ret->cert_store = X509_STORE_new(); 1895 if (ret->cert_store == NULL) 1896 goto err; 1897 1898 ssl_create_cipher_list(ret->method, &ret->cipher_list, 1899 &ret->internal->cipher_list_by_id, SSL_DEFAULT_CIPHER_LIST); 1900 if (ret->cipher_list == NULL || 1901 sk_SSL_CIPHER_num(ret->cipher_list) <= 0) { 1902 SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_LIBRARY_HAS_NO_CIPHERS); 1903 goto err2; 1904 } 1905 1906 ret->param = X509_VERIFY_PARAM_new(); 1907 if (!ret->param) 1908 goto err; 1909 1910 if ((ret->internal->md5 = EVP_get_digestbyname("ssl3-md5")) == NULL) { 1911 SSLerr(SSL_F_SSL_CTX_NEW, 1912 SSL_R_UNABLE_TO_LOAD_SSL3_MD5_ROUTINES); 1913 goto err2; 1914 } 1915 if ((ret->internal->sha1 = EVP_get_digestbyname("ssl3-sha1")) == NULL) { 1916 SSLerr(SSL_F_SSL_CTX_NEW, 1917 SSL_R_UNABLE_TO_LOAD_SSL3_SHA1_ROUTINES); 1918 goto err2; 1919 } 1920 1921 if ((ret->internal->client_CA = sk_X509_NAME_new_null()) == NULL) 1922 goto err; 1923 1924 CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_CTX, ret, &ret->internal->ex_data); 1925 1926 ret->extra_certs = NULL; 1927 1928 ret->internal->max_send_fragment = SSL3_RT_MAX_PLAIN_LENGTH; 1929 1930 ret->internal->tlsext_servername_callback = 0; 1931 ret->internal->tlsext_servername_arg = NULL; 1932 1933 /* Setup RFC4507 ticket keys */ 1934 arc4random_buf(ret->internal->tlsext_tick_key_name, 16); 1935 arc4random_buf(ret->internal->tlsext_tick_hmac_key, 16); 1936 arc4random_buf(ret->internal->tlsext_tick_aes_key, 16); 1937 1938 ret->internal->tlsext_status_cb = 0; 1939 ret->internal->tlsext_status_arg = NULL; 1940 1941 ret->internal->next_protos_advertised_cb = 0; 1942 ret->internal->next_proto_select_cb = 0; 1943 1944#ifndef OPENSSL_NO_ENGINE 1945 ret->internal->client_cert_engine = NULL; 1946#ifdef OPENSSL_SSL_CLIENT_ENGINE_AUTO 1947#define eng_strx(x) #x 1948#define eng_str(x) eng_strx(x) 1949 /* Use specific client engine automatically... ignore errors */ 1950 { 1951 ENGINE *eng; 1952 eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO)); 1953 if (!eng) { 1954 ERR_clear_error(); 1955 ENGINE_load_builtin_engines(); 1956 eng = ENGINE_by_id(eng_str( 1957 OPENSSL_SSL_CLIENT_ENGINE_AUTO)); 1958 } 1959 if (!eng || !SSL_CTX_set_client_cert_engine(ret, eng)) 1960 ERR_clear_error(); 1961 } 1962#endif 1963#endif 1964 /* 1965 * Default is to connect to non-RI servers. When RI is more widely 1966 * deployed might change this. 1967 */ 1968 ret->internal->options |= SSL_OP_LEGACY_SERVER_CONNECT; 1969 1970 return (ret); 1971err: 1972 SSLerr(SSL_F_SSL_CTX_NEW, ERR_R_MALLOC_FAILURE); 1973err2: 1974 SSL_CTX_free(ret); 1975 return (NULL); 1976} 1977 1978void 1979SSL_CTX_free(SSL_CTX *ctx) 1980{ 1981 int i; 1982 1983 if (ctx == NULL) 1984 return; 1985 1986 i = CRYPTO_add(&ctx->references, -1, CRYPTO_LOCK_SSL_CTX); 1987 if (i > 0) 1988 return; 1989 1990 X509_VERIFY_PARAM_free(ctx->param); 1991 1992 /* 1993 * Free internal session cache. However: the remove_cb() may reference 1994 * the ex_data of SSL_CTX, thus the ex_data store can only be removed 1995 * after the sessions were flushed. 1996 * As the ex_data handling routines might also touch the session cache, 1997 * the most secure solution seems to be: empty (flush) the cache, then 1998 * free ex_data, then finally free the cache. 1999 * (See ticket [openssl.org #212].) 2000 */ 2001 if (ctx->internal->sessions != NULL) 2002 SSL_CTX_flush_sessions(ctx, 0); 2003 2004 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_CTX, ctx, &ctx->internal->ex_data); 2005 2006 lh_SSL_SESSION_free(ctx->internal->sessions); 2007 2008 X509_STORE_free(ctx->cert_store); 2009 sk_SSL_CIPHER_free(ctx->cipher_list); 2010 sk_SSL_CIPHER_free(ctx->internal->cipher_list_by_id); 2011 ssl_cert_free(ctx->internal->cert); 2012 sk_X509_NAME_pop_free(ctx->internal->client_CA, X509_NAME_free); 2013 sk_X509_pop_free(ctx->extra_certs, X509_free); 2014 2015#ifndef OPENSSL_NO_SRTP 2016 if (ctx->internal->srtp_profiles) 2017 sk_SRTP_PROTECTION_PROFILE_free(ctx->internal->srtp_profiles); 2018#endif 2019 2020#ifndef OPENSSL_NO_ENGINE 2021 if (ctx->internal->client_cert_engine) 2022 ENGINE_finish(ctx->internal->client_cert_engine); 2023#endif 2024 2025 free(ctx->internal->tlsext_ecpointformatlist); 2026 free(ctx->internal->tlsext_supportedgroups); 2027 2028 free(ctx->internal->alpn_client_proto_list); 2029 2030 free(ctx->internal); 2031 free(ctx); 2032} 2033 2034void 2035SSL_CTX_set_default_passwd_cb(SSL_CTX *ctx, pem_password_cb *cb) 2036{ 2037 ctx->default_passwd_callback = cb; 2038} 2039 2040void 2041SSL_CTX_set_default_passwd_cb_userdata(SSL_CTX *ctx, void *u) 2042{ 2043 ctx->default_passwd_callback_userdata = u; 2044} 2045 2046void 2047SSL_CTX_set_cert_verify_callback(SSL_CTX *ctx, int (*cb)(X509_STORE_CTX *, 2048 void *), void *arg) 2049{ 2050 ctx->internal->app_verify_callback = cb; 2051 ctx->internal->app_verify_arg = arg; 2052} 2053 2054void 2055SSL_CTX_set_verify(SSL_CTX *ctx, int mode, int (*cb)(int, X509_STORE_CTX *)) 2056{ 2057 ctx->verify_mode = mode; 2058 ctx->internal->default_verify_callback = cb; 2059} 2060 2061void 2062SSL_CTX_set_verify_depth(SSL_CTX *ctx, int depth) 2063{ 2064 X509_VERIFY_PARAM_set_depth(ctx->param, depth); 2065} 2066 2067void 2068ssl_set_cert_masks(CERT *c, const SSL_CIPHER *cipher) 2069{ 2070 int rsa_enc, rsa_sign, dh_tmp, dsa_sign; 2071 int have_ecc_cert, have_ecdh_tmp; 2072 unsigned long mask_k, mask_a; 2073 X509 *x = NULL; 2074 CERT_PKEY *cpk; 2075 2076 if (c == NULL) 2077 return; 2078 2079 dh_tmp = (c->dh_tmp != NULL || c->dh_tmp_cb != NULL || 2080 c->dh_tmp_auto != 0); 2081 2082 have_ecdh_tmp = (c->ecdh_tmp != NULL || c->ecdh_tmp_cb != NULL || 2083 c->ecdh_tmp_auto != 0); 2084 2085 cpk = &(c->pkeys[SSL_PKEY_RSA_ENC]); 2086 rsa_enc = (cpk->x509 != NULL && cpk->privatekey != NULL); 2087 cpk = &(c->pkeys[SSL_PKEY_RSA_SIGN]); 2088 rsa_sign = (cpk->x509 != NULL && cpk->privatekey != NULL); 2089 cpk = &(c->pkeys[SSL_PKEY_DSA_SIGN]); 2090 dsa_sign = (cpk->x509 != NULL && cpk->privatekey != NULL); 2091/* FIX THIS EAY EAY EAY */ 2092 cpk = &(c->pkeys[SSL_PKEY_ECC]); 2093 have_ecc_cert = (cpk->x509 != NULL && cpk->privatekey != NULL); 2094 mask_k = 0; 2095 mask_a = 0; 2096 2097 cpk = &(c->pkeys[SSL_PKEY_GOST01]); 2098 if (cpk->x509 != NULL && cpk->privatekey !=NULL) { 2099 mask_k |= SSL_kGOST; 2100 mask_a |= SSL_aGOST01; 2101 } 2102 2103 if (rsa_enc) 2104 mask_k|=SSL_kRSA; 2105 2106 if (dh_tmp) 2107 mask_k|=SSL_kDHE; 2108 2109 if (rsa_enc || rsa_sign) 2110 mask_a|=SSL_aRSA; 2111 2112 if (dsa_sign) 2113 mask_a|=SSL_aDSS; 2114 2115 mask_a|=SSL_aNULL; 2116 2117 /* 2118 * An ECC certificate may be usable for ECDH and/or 2119 * ECDSA cipher suites depending on the key usage extension. 2120 */ 2121 if (have_ecc_cert) { 2122 x = (c->pkeys[SSL_PKEY_ECC]).x509; 2123 2124 /* This call populates extension flags (ex_flags). */ 2125 X509_check_purpose(x, -1, 0); 2126 2127 /* Key usage, if present, must allow signing. */ 2128 if ((x->ex_flags & EXFLAG_KUSAGE) == 0 || 2129 (x->ex_kusage & X509v3_KU_DIGITAL_SIGNATURE)) 2130 mask_a|=SSL_aECDSA; 2131 } 2132 2133 if (have_ecdh_tmp) 2134 mask_k|=SSL_kECDHE; 2135 2136 c->mask_k = mask_k; 2137 c->mask_a = mask_a; 2138 c->valid = 1; 2139} 2140 2141int 2142ssl_check_srvr_ecc_cert_and_alg(X509 *x, SSL *s) 2143{ 2144 const SSL_CIPHER *cs = S3I(s)->tmp.new_cipher; 2145 unsigned long alg_a; 2146 2147 alg_a = cs->algorithm_auth; 2148 2149 if (alg_a & SSL_aECDSA) { 2150 /* This call populates extension flags (ex_flags). */ 2151 X509_check_purpose(x, -1, 0); 2152 2153 /* Key usage, if present, must allow signing. */ 2154 if ((x->ex_flags & EXFLAG_KUSAGE) && 2155 ((x->ex_kusage & X509v3_KU_DIGITAL_SIGNATURE) == 0)) { 2156 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, 2157 SSL_R_ECC_CERT_NOT_FOR_SIGNING); 2158 return (0); 2159 } 2160 } 2161 2162 return (1); 2163} 2164 2165CERT_PKEY * 2166ssl_get_server_send_pkey(const SSL *s) 2167{ 2168 unsigned long alg_a; 2169 CERT *c; 2170 int i; 2171 2172 c = s->cert; 2173 ssl_set_cert_masks(c, S3I(s)->tmp.new_cipher); 2174 2175 alg_a = S3I(s)->tmp.new_cipher->algorithm_auth; 2176 2177 if (alg_a & SSL_aECDSA) { 2178 i = SSL_PKEY_ECC; 2179 } else if (alg_a & SSL_aDSS) { 2180 i = SSL_PKEY_DSA_SIGN; 2181 } else if (alg_a & SSL_aRSA) { 2182 if (c->pkeys[SSL_PKEY_RSA_ENC].x509 == NULL) 2183 i = SSL_PKEY_RSA_SIGN; 2184 else 2185 i = SSL_PKEY_RSA_ENC; 2186 } else if (alg_a & SSL_aGOST01) { 2187 i = SSL_PKEY_GOST01; 2188 } else { /* if (alg_a & SSL_aNULL) */ 2189 SSLerr(SSL_F_SSL_GET_SERVER_SEND_PKEY, ERR_R_INTERNAL_ERROR); 2190 return (NULL); 2191 } 2192 2193 return (c->pkeys + i); 2194} 2195 2196X509 * 2197ssl_get_server_send_cert(const SSL *s) 2198{ 2199 CERT_PKEY *cpk; 2200 2201 cpk = ssl_get_server_send_pkey(s); 2202 if (!cpk) 2203 return (NULL); 2204 return (cpk->x509); 2205} 2206 2207EVP_PKEY * 2208ssl_get_sign_pkey(SSL *s, const SSL_CIPHER *cipher, const EVP_MD **pmd) 2209{ 2210 unsigned long alg_a; 2211 CERT *c; 2212 int idx = -1; 2213 2214 alg_a = cipher->algorithm_auth; 2215 c = s->cert; 2216 2217 if ((alg_a & SSL_aDSS) && 2218 (c->pkeys[SSL_PKEY_DSA_SIGN].privatekey != NULL)) 2219 idx = SSL_PKEY_DSA_SIGN; 2220 else if (alg_a & SSL_aRSA) { 2221 if (c->pkeys[SSL_PKEY_RSA_SIGN].privatekey != NULL) 2222 idx = SSL_PKEY_RSA_SIGN; 2223 else if (c->pkeys[SSL_PKEY_RSA_ENC].privatekey != NULL) 2224 idx = SSL_PKEY_RSA_ENC; 2225 } else if ((alg_a & SSL_aECDSA) && 2226 (c->pkeys[SSL_PKEY_ECC].privatekey != NULL)) 2227 idx = SSL_PKEY_ECC; 2228 if (idx == -1) { 2229 SSLerr(SSL_F_SSL_GET_SIGN_PKEY, ERR_R_INTERNAL_ERROR); 2230 return (NULL); 2231 } 2232 if (pmd) 2233 *pmd = c->pkeys[idx].digest; 2234 return (c->pkeys[idx].privatekey); 2235} 2236 2237DH * 2238ssl_get_auto_dh(SSL *s) 2239{ 2240 CERT_PKEY *cpk; 2241 int keylen; 2242 DH *dhp; 2243 2244 if (s->cert->dh_tmp_auto == 2) { 2245 keylen = 1024; 2246 } else if (S3I(s)->tmp.new_cipher->algorithm_auth & SSL_aNULL) { 2247 keylen = 1024; 2248 if (S3I(s)->tmp.new_cipher->strength_bits == 256) 2249 keylen = 3072; 2250 } else { 2251 if ((cpk = ssl_get_server_send_pkey(s)) == NULL) 2252 return (NULL); 2253 if (cpk->privatekey == NULL || cpk->privatekey->pkey.dh == NULL) 2254 return (NULL); 2255 keylen = EVP_PKEY_bits(cpk->privatekey); 2256 } 2257 2258 if ((dhp = DH_new()) == NULL) 2259 return (NULL); 2260 2261 dhp->g = BN_new(); 2262 if (dhp->g != NULL) 2263 BN_set_word(dhp->g, 2); 2264 2265 if (keylen >= 8192) 2266 dhp->p = get_rfc3526_prime_8192(NULL); 2267 else if (keylen >= 4096) 2268 dhp->p = get_rfc3526_prime_4096(NULL); 2269 else if (keylen >= 3072) 2270 dhp->p = get_rfc3526_prime_3072(NULL); 2271 else if (keylen >= 2048) 2272 dhp->p = get_rfc3526_prime_2048(NULL); 2273 else if (keylen >= 1536) 2274 dhp->p = get_rfc3526_prime_1536(NULL); 2275 else 2276 dhp->p = get_rfc2409_prime_1024(NULL); 2277 2278 if (dhp->p == NULL || dhp->g == NULL) { 2279 DH_free(dhp); 2280 return (NULL); 2281 } 2282 return (dhp); 2283} 2284 2285void 2286ssl_update_cache(SSL *s, int mode) 2287{ 2288 int i; 2289 2290 /* 2291 * If the session_id_length is 0, we are not supposed to cache it, 2292 * and it would be rather hard to do anyway :-) 2293 */ 2294 if (s->session->session_id_length == 0) 2295 return; 2296 2297 i = s->session_ctx->internal->session_cache_mode; 2298 if ((i & mode) && (!s->internal->hit) && ((i & SSL_SESS_CACHE_NO_INTERNAL_STORE) 2299 || SSL_CTX_add_session(s->session_ctx, s->session)) 2300 && (s->session_ctx->internal->new_session_cb != NULL)) { 2301 CRYPTO_add(&s->session->references, 1, CRYPTO_LOCK_SSL_SESSION); 2302 if (!s->session_ctx->internal->new_session_cb(s, s->session)) 2303 SSL_SESSION_free(s->session); 2304 } 2305 2306 /* auto flush every 255 connections */ 2307 if ((!(i & SSL_SESS_CACHE_NO_AUTO_CLEAR)) && 2308 ((i & mode) == mode)) { 2309 if ((((mode & SSL_SESS_CACHE_CLIENT) ? 2310 s->session_ctx->internal->stats.sess_connect_good : 2311 s->session_ctx->internal->stats.sess_accept_good) & 0xff) == 0xff) { 2312 SSL_CTX_flush_sessions(s->session_ctx, time(NULL)); 2313 } 2314 } 2315} 2316 2317const SSL_METHOD * 2318SSL_get_ssl_method(SSL *s) 2319{ 2320 return (s->method); 2321} 2322 2323int 2324SSL_set_ssl_method(SSL *s, const SSL_METHOD *meth) 2325{ 2326 int conn = -1; 2327 int ret = 1; 2328 2329 if (s->method != meth) { 2330 if (s->internal->handshake_func != NULL) 2331 conn = (s->internal->handshake_func == s->method->internal->ssl_connect); 2332 2333 if (s->method->internal->version == meth->internal->version) 2334 s->method = meth; 2335 else { 2336 s->method->internal->ssl_free(s); 2337 s->method = meth; 2338 ret = s->method->internal->ssl_new(s); 2339 } 2340 2341 if (conn == 1) 2342 s->internal->handshake_func = meth->internal->ssl_connect; 2343 else if (conn == 0) 2344 s->internal->handshake_func = meth->internal->ssl_accept; 2345 } 2346 return (ret); 2347} 2348 2349int 2350SSL_get_error(const SSL *s, int i) 2351{ 2352 int reason; 2353 unsigned long l; 2354 BIO *bio; 2355 2356 if (i > 0) 2357 return (SSL_ERROR_NONE); 2358 2359 /* Make things return SSL_ERROR_SYSCALL when doing SSL_do_handshake 2360 * etc, where we do encode the error */ 2361 if ((l = ERR_peek_error()) != 0) { 2362 if (ERR_GET_LIB(l) == ERR_LIB_SYS) 2363 return (SSL_ERROR_SYSCALL); 2364 else 2365 return (SSL_ERROR_SSL); 2366 } 2367 2368 if ((i < 0) && SSL_want_read(s)) { 2369 bio = SSL_get_rbio(s); 2370 if (BIO_should_read(bio)) { 2371 return (SSL_ERROR_WANT_READ); 2372 } else if (BIO_should_write(bio)) { 2373 /* 2374 * This one doesn't make too much sense... We never 2375 * try to write to the rbio, and an application 2376 * program where rbio and wbio are separate couldn't 2377 * even know what it should wait for. However if we 2378 * ever set s->internal->rwstate incorrectly (so that we have 2379 * SSL_want_read(s) instead of SSL_want_write(s)) 2380 * and rbio and wbio *are* the same, this test works 2381 * around that bug; so it might be safer to keep it. 2382 */ 2383 return (SSL_ERROR_WANT_WRITE); 2384 } else if (BIO_should_io_special(bio)) { 2385 reason = BIO_get_retry_reason(bio); 2386 if (reason == BIO_RR_CONNECT) 2387 return (SSL_ERROR_WANT_CONNECT); 2388 else if (reason == BIO_RR_ACCEPT) 2389 return (SSL_ERROR_WANT_ACCEPT); 2390 else 2391 return (SSL_ERROR_SYSCALL); /* unknown */ 2392 } 2393 } 2394 2395 if ((i < 0) && SSL_want_write(s)) { 2396 bio = SSL_get_wbio(s); 2397 if (BIO_should_write(bio)) { 2398 return (SSL_ERROR_WANT_WRITE); 2399 } else if (BIO_should_read(bio)) { 2400 /* 2401 * See above (SSL_want_read(s) with 2402 * BIO_should_write(bio)) 2403 */ 2404 return (SSL_ERROR_WANT_READ); 2405 } else if (BIO_should_io_special(bio)) { 2406 reason = BIO_get_retry_reason(bio); 2407 if (reason == BIO_RR_CONNECT) 2408 return (SSL_ERROR_WANT_CONNECT); 2409 else if (reason == BIO_RR_ACCEPT) 2410 return (SSL_ERROR_WANT_ACCEPT); 2411 else 2412 return (SSL_ERROR_SYSCALL); 2413 } 2414 } 2415 if ((i < 0) && SSL_want_x509_lookup(s)) { 2416 return (SSL_ERROR_WANT_X509_LOOKUP); 2417 } 2418 2419 if (i == 0) { 2420 if ((s->internal->shutdown & SSL_RECEIVED_SHUTDOWN) && 2421 (S3I(s)->warn_alert == SSL_AD_CLOSE_NOTIFY)) 2422 return (SSL_ERROR_ZERO_RETURN); 2423 } 2424 return (SSL_ERROR_SYSCALL); 2425} 2426 2427int 2428SSL_do_handshake(SSL *s) 2429{ 2430 int ret = 1; 2431 2432 if (s->internal->handshake_func == NULL) { 2433 SSLerr(SSL_F_SSL_DO_HANDSHAKE, SSL_R_CONNECTION_TYPE_NOT_SET); 2434 return (-1); 2435 } 2436 2437 s->method->internal->ssl_renegotiate_check(s); 2438 2439 if (SSL_in_init(s) || SSL_in_before(s)) { 2440 ret = s->internal->handshake_func(s); 2441 } 2442 return (ret); 2443} 2444 2445/* 2446 * For the next 2 functions, SSL_clear() sets shutdown and so 2447 * one of these calls will reset it 2448 */ 2449void 2450SSL_set_accept_state(SSL *s) 2451{ 2452 s->server = 1; 2453 s->internal->shutdown = 0; 2454 s->internal->state = SSL_ST_ACCEPT|SSL_ST_BEFORE; 2455 s->internal->handshake_func = s->method->internal->ssl_accept; 2456 /* clear the current cipher */ 2457 ssl_clear_cipher_ctx(s); 2458 ssl_clear_hash_ctx(&s->read_hash); 2459 ssl_clear_hash_ctx(&s->internal->write_hash); 2460} 2461 2462void 2463SSL_set_connect_state(SSL *s) 2464{ 2465 s->server = 0; 2466 s->internal->shutdown = 0; 2467 s->internal->state = SSL_ST_CONNECT|SSL_ST_BEFORE; 2468 s->internal->handshake_func = s->method->internal->ssl_connect; 2469 /* clear the current cipher */ 2470 ssl_clear_cipher_ctx(s); 2471 ssl_clear_hash_ctx(&s->read_hash); 2472 ssl_clear_hash_ctx(&s->internal->write_hash); 2473} 2474 2475int 2476ssl_undefined_function(SSL *s) 2477{ 2478 SSLerr(SSL_F_SSL_UNDEFINED_FUNCTION, 2479 ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); 2480 return (0); 2481} 2482 2483int 2484ssl_undefined_void_function(void) 2485{ 2486 SSLerr(SSL_F_SSL_UNDEFINED_VOID_FUNCTION, 2487 ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); 2488 return (0); 2489} 2490 2491int 2492ssl_undefined_const_function(const SSL *s) 2493{ 2494 SSLerr(SSL_F_SSL_UNDEFINED_CONST_FUNCTION, 2495 ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); 2496 return (0); 2497} 2498 2499const char * 2500ssl_version_string(int ver) 2501{ 2502 switch (ver) { 2503 case DTLS1_VERSION: 2504 return (SSL_TXT_DTLS1); 2505 case TLS1_VERSION: 2506 return (SSL_TXT_TLSV1); 2507 case TLS1_1_VERSION: 2508 return (SSL_TXT_TLSV1_1); 2509 case TLS1_2_VERSION: 2510 return (SSL_TXT_TLSV1_2); 2511 default: 2512 return ("unknown"); 2513 } 2514} 2515 2516const char * 2517SSL_get_version(const SSL *s) 2518{ 2519 return ssl_version_string(s->version); 2520} 2521 2522static int 2523ssl_clamp_version_range(uint16_t *min_ver, uint16_t *max_ver, 2524 uint16_t clamp_min, uint16_t clamp_max) 2525{ 2526 if (clamp_min > clamp_max || *min_ver > *max_ver) 2527 return 0; 2528 if (clamp_max < *min_ver || clamp_min > *max_ver) 2529 return 0; 2530 2531 if (*min_ver < clamp_min) 2532 *min_ver = clamp_min; 2533 if (*max_ver > clamp_max) 2534 *max_ver = clamp_max; 2535 2536 return 1; 2537} 2538 2539int 2540ssl_enabled_version_range(SSL *s, uint16_t *min_ver, uint16_t *max_ver) 2541{ 2542 uint16_t min_version, max_version; 2543 2544 /* 2545 * The enabled versions have to be a contiguous range, which means we 2546 * cannot enable and disable single versions at our whim, even though 2547 * this is what the OpenSSL flags allow. The historical way this has 2548 * been handled is by making a flag mean that all higher versions 2549 * are disabled, if any version lower than the flag is enabled. 2550 */ 2551 2552 min_version = 0; 2553 max_version = TLS1_2_VERSION; 2554 2555 if ((s->internal->options & SSL_OP_NO_TLSv1) == 0) 2556 min_version = TLS1_VERSION; 2557 else if ((s->internal->options & SSL_OP_NO_TLSv1_1) == 0) 2558 min_version = TLS1_1_VERSION; 2559 else if ((s->internal->options & SSL_OP_NO_TLSv1_2) == 0) 2560 min_version = TLS1_2_VERSION; 2561 2562 if ((s->internal->options & SSL_OP_NO_TLSv1_2) && min_version < TLS1_2_VERSION) 2563 max_version = TLS1_1_VERSION; 2564 if ((s->internal->options & SSL_OP_NO_TLSv1_1) && min_version < TLS1_1_VERSION) 2565 max_version = TLS1_VERSION; 2566 if ((s->internal->options & SSL_OP_NO_TLSv1) && min_version < TLS1_VERSION) 2567 max_version = 0; 2568 2569 /* Everything has been disabled... */ 2570 if (min_version == 0 || max_version == 0) 2571 return 0; 2572 2573 /* Limit to configured version range. */ 2574 if (!ssl_clamp_version_range(&min_version, &max_version, 2575 s->internal->min_version, s->internal->max_version)) 2576 return 0; 2577 2578 if (min_ver != NULL) 2579 *min_ver = min_version; 2580 if (max_ver != NULL) 2581 *max_ver = max_version; 2582 2583 return 1; 2584} 2585 2586int 2587ssl_supported_version_range(SSL *s, uint16_t *min_ver, uint16_t *max_ver) 2588{ 2589 uint16_t min_version, max_version; 2590 2591 /* DTLS cannot currently be disabled... */ 2592 if (SSL_IS_DTLS(s)) { 2593 min_version = max_version = DTLS1_VERSION; 2594 goto done; 2595 } 2596 2597 if (!ssl_enabled_version_range(s, &min_version, &max_version)) 2598 return 0; 2599 2600 /* Limit to the versions supported by this method. */ 2601 if (!ssl_clamp_version_range(&min_version, &max_version, 2602 s->method->internal->min_version, 2603 s->method->internal->max_version)) 2604 return 0; 2605 2606 done: 2607 if (min_ver != NULL) 2608 *min_ver = min_version; 2609 if (max_ver != NULL) 2610 *max_ver = max_version; 2611 2612 return 1; 2613} 2614 2615int 2616ssl_max_shared_version(SSL *s, uint16_t peer_ver, uint16_t *max_ver) 2617{ 2618 uint16_t min_version, max_version, shared_version; 2619 2620 *max_ver = 0; 2621 2622 if (SSL_IS_DTLS(s)) { 2623 if (peer_ver >= DTLS1_VERSION) { 2624 *max_ver = DTLS1_VERSION; 2625 return 1; 2626 } 2627 return 0; 2628 } 2629 2630 if (peer_ver >= TLS1_2_VERSION) 2631 shared_version = TLS1_2_VERSION; 2632 else if (peer_ver >= TLS1_1_VERSION) 2633 shared_version = TLS1_1_VERSION; 2634 else if (peer_ver >= TLS1_VERSION) 2635 shared_version = TLS1_VERSION; 2636 else 2637 return 0; 2638 2639 if (!ssl_supported_version_range(s, &min_version, &max_version)) 2640 return 0; 2641 2642 if (shared_version < min_version) 2643 return 0; 2644 2645 if (shared_version > max_version) 2646 shared_version = max_version; 2647 2648 *max_ver = shared_version; 2649 2650 return 1; 2651} 2652 2653uint16_t 2654ssl_max_server_version(SSL *s) 2655{ 2656 uint16_t max_version, min_version = 0; 2657 2658 if (SSL_IS_DTLS(s)) 2659 return (DTLS1_VERSION); 2660 2661 if (!ssl_enabled_version_range(s, &min_version, &max_version)) 2662 return 0; 2663 2664 /* 2665 * Limit to the versions supported by this method. The SSL method 2666 * will be changed during version negotiation, as such we want to 2667 * use the SSL method from the context. 2668 */ 2669 if (!ssl_clamp_version_range(&min_version, &max_version, 2670 s->ctx->method->internal->min_version, 2671 s->ctx->method->internal->max_version)) 2672 return 0; 2673 2674 return (max_version); 2675} 2676 2677SSL * 2678SSL_dup(SSL *s) 2679{ 2680 STACK_OF(X509_NAME) *sk; 2681 X509_NAME *xn; 2682 SSL *ret; 2683 int i; 2684 2685 if ((ret = SSL_new(SSL_get_SSL_CTX(s))) == NULL) 2686 return (NULL); 2687 2688 ret->version = s->version; 2689 ret->internal->type = s->internal->type; 2690 ret->method = s->method; 2691 2692 if (s->session != NULL) { 2693 /* This copies session-id, SSL_METHOD, sid_ctx, and 'cert' */ 2694 SSL_copy_session_id(ret, s); 2695 } else { 2696 /* 2697 * No session has been established yet, so we have to expect 2698 * that s->cert or ret->cert will be changed later -- 2699 * they should not both point to the same object, 2700 * and thus we can't use SSL_copy_session_id. 2701 */ 2702 2703 ret->method->internal->ssl_free(ret); 2704 ret->method = s->method; 2705 ret->method->internal->ssl_new(ret); 2706 2707 if (s->cert != NULL) { 2708 ssl_cert_free(ret->cert); 2709 ret->cert = ssl_cert_dup(s->cert); 2710 if (ret->cert == NULL) 2711 goto err; 2712 } 2713 2714 SSL_set_session_id_context(ret, 2715 s->sid_ctx, s->sid_ctx_length); 2716 } 2717 2718 ret->internal->options = s->internal->options; 2719 ret->internal->mode = s->internal->mode; 2720 SSL_set_max_cert_list(ret, SSL_get_max_cert_list(s)); 2721 SSL_set_read_ahead(ret, SSL_get_read_ahead(s)); 2722 ret->internal->msg_callback = s->internal->msg_callback; 2723 ret->internal->msg_callback_arg = s->internal->msg_callback_arg; 2724 SSL_set_verify(ret, SSL_get_verify_mode(s), 2725 SSL_get_verify_callback(s)); 2726 SSL_set_verify_depth(ret, SSL_get_verify_depth(s)); 2727 ret->internal->generate_session_id = s->internal->generate_session_id; 2728 2729 SSL_set_info_callback(ret, SSL_get_info_callback(s)); 2730 2731 ret->internal->debug = s->internal->debug; 2732 2733 /* copy app data, a little dangerous perhaps */ 2734 if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_SSL, 2735 &ret->internal->ex_data, &s->internal->ex_data)) 2736 goto err; 2737 2738 /* setup rbio, and wbio */ 2739 if (s->rbio != NULL) { 2740 if (!BIO_dup_state(s->rbio,(char *)&ret->rbio)) 2741 goto err; 2742 } 2743 if (s->wbio != NULL) { 2744 if (s->wbio != s->rbio) { 2745 if (!BIO_dup_state(s->wbio,(char *)&ret->wbio)) 2746 goto err; 2747 } else 2748 ret->wbio = ret->rbio; 2749 } 2750 ret->internal->rwstate = s->internal->rwstate; 2751 ret->internal->in_handshake = s->internal->in_handshake; 2752 ret->internal->handshake_func = s->internal->handshake_func; 2753 ret->server = s->server; 2754 ret->internal->renegotiate = s->internal->renegotiate; 2755 ret->internal->new_session = s->internal->new_session; 2756 ret->internal->quiet_shutdown = s->internal->quiet_shutdown; 2757 ret->internal->shutdown = s->internal->shutdown; 2758 /* SSL_dup does not really work at any state, though */ 2759 ret->internal->state = s->internal->state; 2760 ret->internal->rstate = s->internal->rstate; 2761 2762 /* 2763 * Would have to copy ret->init_buf, ret->init_msg, ret->init_num, 2764 * ret->init_off 2765 */ 2766 ret->internal->init_num = 0; 2767 2768 ret->internal->hit = s->internal->hit; 2769 2770 X509_VERIFY_PARAM_inherit(ret->param, s->param); 2771 2772 /* dup the cipher_list and cipher_list_by_id stacks */ 2773 if (s->cipher_list != NULL) { 2774 if ((ret->cipher_list = 2775 sk_SSL_CIPHER_dup(s->cipher_list)) == NULL) 2776 goto err; 2777 } 2778 if (s->internal->cipher_list_by_id != NULL) { 2779 if ((ret->internal->cipher_list_by_id = 2780 sk_SSL_CIPHER_dup(s->internal->cipher_list_by_id)) == NULL) 2781 goto err; 2782 } 2783 2784 /* Dup the client_CA list */ 2785 if (s->internal->client_CA != NULL) { 2786 if ((sk = sk_X509_NAME_dup(s->internal->client_CA)) == NULL) goto err; 2787 ret->internal->client_CA = sk; 2788 for (i = 0; i < sk_X509_NAME_num(sk); i++) { 2789 xn = sk_X509_NAME_value(sk, i); 2790 if (sk_X509_NAME_set(sk, i, 2791 X509_NAME_dup(xn)) == NULL) { 2792 X509_NAME_free(xn); 2793 goto err; 2794 } 2795 } 2796 } 2797 2798 if (0) { 2799err: 2800 if (ret != NULL) 2801 SSL_free(ret); 2802 ret = NULL; 2803 } 2804 return (ret); 2805} 2806 2807void 2808ssl_clear_cipher_ctx(SSL *s) 2809{ 2810 EVP_CIPHER_CTX_free(s->enc_read_ctx); 2811 s->enc_read_ctx = NULL; 2812 EVP_CIPHER_CTX_free(s->internal->enc_write_ctx); 2813 s->internal->enc_write_ctx = NULL; 2814 2815 if (s->internal->aead_read_ctx != NULL) { 2816 EVP_AEAD_CTX_cleanup(&s->internal->aead_read_ctx->ctx); 2817 free(s->internal->aead_read_ctx); 2818 s->internal->aead_read_ctx = NULL; 2819 } 2820 if (s->internal->aead_write_ctx != NULL) { 2821 EVP_AEAD_CTX_cleanup(&s->internal->aead_write_ctx->ctx); 2822 free(s->internal->aead_write_ctx); 2823 s->internal->aead_write_ctx = NULL; 2824 } 2825 2826} 2827 2828/* Fix this function so that it takes an optional type parameter */ 2829X509 * 2830SSL_get_certificate(const SSL *s) 2831{ 2832 if (s->cert != NULL) 2833 return (s->cert->key->x509); 2834 else 2835 return (NULL); 2836} 2837 2838/* Fix this function so that it takes an optional type parameter */ 2839EVP_PKEY * 2840SSL_get_privatekey(SSL *s) 2841{ 2842 if (s->cert != NULL) 2843 return (s->cert->key->privatekey); 2844 else 2845 return (NULL); 2846} 2847 2848const SSL_CIPHER * 2849SSL_get_current_cipher(const SSL *s) 2850{ 2851 if ((s->session != NULL) && (s->session->cipher != NULL)) 2852 return (s->session->cipher); 2853 return (NULL); 2854} 2855const void * 2856SSL_get_current_compression(SSL *s) 2857{ 2858 return (NULL); 2859} 2860 2861const void * 2862SSL_get_current_expansion(SSL *s) 2863{ 2864 return (NULL); 2865} 2866 2867int 2868ssl_init_wbio_buffer(SSL *s, int push) 2869{ 2870 BIO *bbio; 2871 2872 if (s->bbio == NULL) { 2873 bbio = BIO_new(BIO_f_buffer()); 2874 if (bbio == NULL) 2875 return (0); 2876 s->bbio = bbio; 2877 } else { 2878 bbio = s->bbio; 2879 if (s->bbio == s->wbio) 2880 s->wbio = BIO_pop(s->wbio); 2881 } 2882 (void)BIO_reset(bbio); 2883/* if (!BIO_set_write_buffer_size(bbio,16*1024)) */ 2884 if (!BIO_set_read_buffer_size(bbio, 1)) { 2885 SSLerr(SSL_F_SSL_INIT_WBIO_BUFFER, ERR_R_BUF_LIB); 2886 return (0); 2887 } 2888 if (push) { 2889 if (s->wbio != bbio) 2890 s->wbio = BIO_push(bbio, s->wbio); 2891 } else { 2892 if (s->wbio == bbio) 2893 s->wbio = BIO_pop(bbio); 2894 } 2895 return (1); 2896} 2897 2898void 2899ssl_free_wbio_buffer(SSL *s) 2900{ 2901 if (s == NULL) 2902 return; 2903 2904 if (s->bbio == NULL) 2905 return; 2906 2907 if (s->bbio == s->wbio) { 2908 /* remove buffering */ 2909 s->wbio = BIO_pop(s->wbio); 2910 } 2911 BIO_free(s->bbio); 2912 s->bbio = NULL; 2913} 2914 2915void 2916SSL_CTX_set_quiet_shutdown(SSL_CTX *ctx, int mode) 2917{ 2918 ctx->internal->quiet_shutdown = mode; 2919} 2920 2921int 2922SSL_CTX_get_quiet_shutdown(const SSL_CTX *ctx) 2923{ 2924 return (ctx->internal->quiet_shutdown); 2925} 2926 2927void 2928SSL_set_quiet_shutdown(SSL *s, int mode) 2929{ 2930 s->internal->quiet_shutdown = mode; 2931} 2932 2933int 2934SSL_get_quiet_shutdown(const SSL *s) 2935{ 2936 return (s->internal->quiet_shutdown); 2937} 2938 2939void 2940SSL_set_shutdown(SSL *s, int mode) 2941{ 2942 s->internal->shutdown = mode; 2943} 2944 2945int 2946SSL_get_shutdown(const SSL *s) 2947{ 2948 return (s->internal->shutdown); 2949} 2950 2951int 2952SSL_version(const SSL *s) 2953{ 2954 return (s->version); 2955} 2956 2957SSL_CTX * 2958SSL_get_SSL_CTX(const SSL *ssl) 2959{ 2960 return (ssl->ctx); 2961} 2962 2963SSL_CTX * 2964SSL_set_SSL_CTX(SSL *ssl, SSL_CTX* ctx) 2965{ 2966 CERT *ocert = ssl->cert; 2967 2968 if (ssl->ctx == ctx) 2969 return (ssl->ctx); 2970 if (ctx == NULL) 2971 ctx = ssl->initial_ctx; 2972 ssl->cert = ssl_cert_dup(ctx->internal->cert); 2973 if (ocert != NULL) { 2974 int i; 2975 /* Copy negotiated digests from original certificate. */ 2976 for (i = 0; i < SSL_PKEY_NUM; i++) 2977 ssl->cert->pkeys[i].digest = ocert->pkeys[i].digest; 2978 ssl_cert_free(ocert); 2979 } 2980 CRYPTO_add(&ctx->references, 1, CRYPTO_LOCK_SSL_CTX); 2981 SSL_CTX_free(ssl->ctx); /* decrement reference count */ 2982 ssl->ctx = ctx; 2983 return (ssl->ctx); 2984} 2985 2986int 2987SSL_CTX_set_default_verify_paths(SSL_CTX *ctx) 2988{ 2989 return (X509_STORE_set_default_paths(ctx->cert_store)); 2990} 2991 2992int 2993SSL_CTX_load_verify_locations(SSL_CTX *ctx, const char *CAfile, 2994 const char *CApath) 2995{ 2996 return (X509_STORE_load_locations(ctx->cert_store, CAfile, CApath)); 2997} 2998 2999int 3000SSL_CTX_load_verify_mem(SSL_CTX *ctx, void *buf, int len) 3001{ 3002 return (X509_STORE_load_mem(ctx->cert_store, buf, len)); 3003} 3004 3005void 3006SSL_set_info_callback(SSL *ssl, void (*cb)(const SSL *ssl, int type, int val)) 3007{ 3008 ssl->internal->info_callback = cb; 3009} 3010 3011void (*SSL_get_info_callback(const SSL *ssl))(const SSL *ssl, int type, int val) 3012{ 3013 return (ssl->internal->info_callback); 3014} 3015 3016int 3017SSL_state(const SSL *ssl) 3018{ 3019 return (ssl->internal->state); 3020} 3021 3022void 3023SSL_set_state(SSL *ssl, int state) 3024{ 3025 ssl->internal->state = state; 3026} 3027 3028void 3029SSL_set_verify_result(SSL *ssl, long arg) 3030{ 3031 ssl->verify_result = arg; 3032} 3033 3034long 3035SSL_get_verify_result(const SSL *ssl) 3036{ 3037 return (ssl->verify_result); 3038} 3039 3040int 3041SSL_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func, 3042 CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func) 3043{ 3044 return (CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL, argl, argp, 3045 new_func, dup_func, free_func)); 3046} 3047 3048int 3049SSL_set_ex_data(SSL *s, int idx, void *arg) 3050{ 3051 return (CRYPTO_set_ex_data(&s->internal->ex_data, idx, arg)); 3052} 3053 3054void * 3055SSL_get_ex_data(const SSL *s, int idx) 3056{ 3057 return (CRYPTO_get_ex_data(&s->internal->ex_data, idx)); 3058} 3059 3060int 3061SSL_CTX_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func, 3062 CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func) 3063{ 3064 return (CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL_CTX, argl, argp, 3065 new_func, dup_func, free_func)); 3066} 3067 3068int 3069SSL_CTX_set_ex_data(SSL_CTX *s, int idx, void *arg) 3070{ 3071 return (CRYPTO_set_ex_data(&s->internal->ex_data, idx, arg)); 3072} 3073 3074void * 3075SSL_CTX_get_ex_data(const SSL_CTX *s, int idx) 3076{ 3077 return (CRYPTO_get_ex_data(&s->internal->ex_data, idx)); 3078} 3079 3080int 3081ssl_ok(SSL *s) 3082{ 3083 return (1); 3084} 3085 3086X509_STORE * 3087SSL_CTX_get_cert_store(const SSL_CTX *ctx) 3088{ 3089 return (ctx->cert_store); 3090} 3091 3092void 3093SSL_CTX_set_cert_store(SSL_CTX *ctx, X509_STORE *store) 3094{ 3095 X509_STORE_free(ctx->cert_store); 3096 ctx->cert_store = store; 3097} 3098 3099int 3100SSL_want(const SSL *s) 3101{ 3102 return (s->internal->rwstate); 3103} 3104 3105void 3106SSL_CTX_set_tmp_rsa_callback(SSL_CTX *ctx, RSA *(*cb)(SSL *ssl, int is_export, 3107 int keylength)) 3108{ 3109 SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb); 3110} 3111 3112void 3113SSL_set_tmp_rsa_callback(SSL *ssl, RSA *(*cb)(SSL *ssl, int is_export, 3114 int keylength)) 3115{ 3116 SSL_callback_ctrl(ssl, SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb); 3117} 3118 3119void 3120SSL_CTX_set_tmp_dh_callback(SSL_CTX *ctx, DH *(*dh)(SSL *ssl, int is_export, 3121 int keylength)) 3122{ 3123 SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh); 3124} 3125 3126void 3127SSL_set_tmp_dh_callback(SSL *ssl, DH *(*dh)(SSL *ssl, int is_export, 3128 int keylength)) 3129{ 3130 SSL_callback_ctrl(ssl, SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh); 3131} 3132 3133void 3134SSL_CTX_set_tmp_ecdh_callback(SSL_CTX *ctx, EC_KEY *(*ecdh)(SSL *ssl, 3135 int is_export, int keylength)) 3136{ 3137 SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_TMP_ECDH_CB, 3138 (void (*)(void))ecdh); 3139} 3140 3141void 3142SSL_set_tmp_ecdh_callback(SSL *ssl, EC_KEY *(*ecdh)(SSL *ssl, int is_export, 3143 int keylength)) 3144{ 3145 SSL_callback_ctrl(ssl, SSL_CTRL_SET_TMP_ECDH_CB,(void (*)(void))ecdh); 3146} 3147 3148 3149void 3150SSL_CTX_set_msg_callback(SSL_CTX *ctx, void (*cb)(int write_p, int version, 3151 int content_type, const void *buf, size_t len, SSL *ssl, void *arg)) 3152{ 3153 SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_MSG_CALLBACK, 3154 (void (*)(void))cb); 3155} 3156 3157void 3158SSL_set_msg_callback(SSL *ssl, void (*cb)(int write_p, int version, 3159 int content_type, const void *buf, size_t len, SSL *ssl, void *arg)) 3160{ 3161 SSL_callback_ctrl(ssl, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb); 3162} 3163 3164void 3165ssl_clear_hash_ctx(EVP_MD_CTX **hash) 3166{ 3167 if (*hash) 3168 EVP_MD_CTX_destroy(*hash); 3169 *hash = NULL; 3170} 3171 3172void 3173SSL_set_debug(SSL *s, int debug) 3174{ 3175 s->internal->debug = debug; 3176} 3177 3178int 3179SSL_cache_hit(SSL *s) 3180{ 3181 return (s->internal->hit); 3182} 3183 3184 3185static int 3186ssl_cipher_id_cmp_BSEARCH_CMP_FN(const void *a_, const void *b_) 3187{ 3188 SSL_CIPHER const *a = a_; 3189 SSL_CIPHER const *b = b_; 3190 return ssl_cipher_id_cmp(a, b); 3191} 3192 3193SSL_CIPHER * 3194OBJ_bsearch_ssl_cipher_id(SSL_CIPHER *key, SSL_CIPHER const *base, int num) 3195{ 3196 return (SSL_CIPHER *)OBJ_bsearch_(key, base, num, sizeof(SSL_CIPHER), 3197 ssl_cipher_id_cmp_BSEARCH_CMP_FN); 3198} 3199