1 /* $OpenBSD: ssl_lib.c,v 1.144 2017/01/24 01:47:22 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" 159 160 const char *SSL_version_str = OPENSSL_VERSION_TEXT; 161 162 SSL3_ENC_METHOD ssl3_undef_enc_method = { 163 /* 164 * Evil casts, but these functions are only called if there's a 165 * library bug. 166 */ 167 .enc = (int (*)(SSL *, int))ssl_undefined_function, 168 .mac = (int (*)(SSL *, unsigned char *, int))ssl_undefined_function, 169 .setup_key_block = ssl_undefined_function, 170 .generate_master_secret = (int (*)(SSL *, unsigned char *, 171 unsigned char *, int))ssl_undefined_function, 172 .change_cipher_state = (int (*)(SSL*, int))ssl_undefined_function, 173 .final_finish_mac = (int (*)(SSL *, const char*, int, 174 unsigned char *))ssl_undefined_function, 175 .finish_mac_length = 0, 176 .cert_verify_mac = (int (*)(SSL *, int, 177 unsigned char *))ssl_undefined_function, 178 .client_finished_label = NULL, 179 .client_finished_label_len = 0, 180 .server_finished_label = NULL, 181 .server_finished_label_len = 0, 182 .alert_value = (int (*)(int))ssl_undefined_function, 183 .export_keying_material = (int (*)(SSL *, unsigned char *, size_t, 184 const char *, size_t, const unsigned char *, size_t, 185 int use_context))ssl_undefined_function, 186 .enc_flags = 0, 187 }; 188 189 int 190 SSL_clear(SSL *s) 191 { 192 if (s->method == NULL) { 193 SSLerr(SSL_F_SSL_CLEAR, SSL_R_NO_METHOD_SPECIFIED); 194 return (0); 195 } 196 197 if (ssl_clear_bad_session(s)) { 198 SSL_SESSION_free(s->session); 199 s->session = NULL; 200 } 201 202 s->error = 0; 203 s->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 */ 246 int 247 SSL_CTX_set_ssl_version(SSL_CTX *ctx, const SSL_METHOD *meth) 248 { 249 STACK_OF(SSL_CIPHER) *sk; 250 251 ctx->method = meth; 252 253 sk = ssl_create_cipher_list(ctx->method, &(ctx->cipher_list), 254 &(ctx->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 } 262 263 SSL * 264 SSL_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 s->internal->next_proto_negotiated = NULL; 340 341 if (s->ctx->internal->alpn_client_proto_list != NULL) { 342 s->internal->alpn_client_proto_list = 343 malloc(s->ctx->internal->alpn_client_proto_list_len); 344 if (s->internal->alpn_client_proto_list == NULL) 345 goto err; 346 memcpy(s->internal->alpn_client_proto_list, 347 s->ctx->internal->alpn_client_proto_list, 348 s->ctx->internal->alpn_client_proto_list_len); 349 s->internal->alpn_client_proto_list_len = 350 s->ctx->internal->alpn_client_proto_list_len; 351 } 352 353 s->verify_result = X509_V_OK; 354 355 s->method = ctx->method; 356 357 if (!s->method->internal->ssl_new(s)) 358 goto err; 359 360 s->references = 1; 361 s->server = (ctx->method->internal->ssl_accept == ssl_undefined_function) ? 0 : 1; 362 363 SSL_clear(s); 364 365 CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->internal->ex_data); 366 367 return (s); 368 369 err: 370 SSL_free(s); 371 SSLerr(SSL_F_SSL_NEW, ERR_R_MALLOC_FAILURE); 372 return (NULL); 373 } 374 375 int 376 SSL_CTX_set_session_id_context(SSL_CTX *ctx, const unsigned char *sid_ctx, 377 unsigned int sid_ctx_len) 378 { 379 if (sid_ctx_len > sizeof ctx->sid_ctx) { 380 SSLerr(SSL_F_SSL_CTX_SET_SESSION_ID_CONTEXT, 381 SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG); 382 return (0); 383 } 384 ctx->sid_ctx_length = sid_ctx_len; 385 memcpy(ctx->sid_ctx, sid_ctx, sid_ctx_len); 386 387 return (1); 388 } 389 390 int 391 SSL_set_session_id_context(SSL *ssl, const unsigned char *sid_ctx, 392 unsigned int sid_ctx_len) 393 { 394 if (sid_ctx_len > SSL_MAX_SID_CTX_LENGTH) { 395 SSLerr(SSL_F_SSL_SET_SESSION_ID_CONTEXT, 396 SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG); 397 return (0); 398 } 399 ssl->sid_ctx_length = sid_ctx_len; 400 memcpy(ssl->sid_ctx, sid_ctx, sid_ctx_len); 401 402 return (1); 403 } 404 405 int 406 SSL_CTX_set_generate_session_id(SSL_CTX *ctx, GEN_SESSION_CB cb) 407 { 408 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX); 409 ctx->internal->generate_session_id = cb; 410 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX); 411 return (1); 412 } 413 414 int 415 SSL_set_generate_session_id(SSL *ssl, GEN_SESSION_CB cb) 416 { 417 CRYPTO_w_lock(CRYPTO_LOCK_SSL); 418 ssl->internal->generate_session_id = cb; 419 CRYPTO_w_unlock(CRYPTO_LOCK_SSL); 420 return (1); 421 } 422 423 int 424 SSL_has_matching_session_id(const SSL *ssl, const unsigned char *id, 425 unsigned int id_len) 426 { 427 /* 428 * A quick examination of SSL_SESSION_hash and SSL_SESSION_cmp 429 * shows how we can "construct" a session to give us the desired 430 * check - ie. to find if there's a session in the hash table 431 * that would conflict with any new session built out of this 432 * id/id_len and the ssl_version in use by this SSL. 433 */ 434 SSL_SESSION r, *p; 435 436 if (id_len > sizeof r.session_id) 437 return (0); 438 439 r.ssl_version = ssl->version; 440 r.session_id_length = id_len; 441 memcpy(r.session_id, id, id_len); 442 443 CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX); 444 p = lh_SSL_SESSION_retrieve(ssl->ctx->internal->sessions, &r); 445 CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX); 446 return (p != NULL); 447 } 448 449 int 450 SSL_CTX_set_purpose(SSL_CTX *s, int purpose) 451 { 452 return (X509_VERIFY_PARAM_set_purpose(s->param, purpose)); 453 } 454 455 int 456 SSL_set_purpose(SSL *s, int purpose) 457 { 458 return (X509_VERIFY_PARAM_set_purpose(s->param, purpose)); 459 } 460 461 int 462 SSL_CTX_set_trust(SSL_CTX *s, int trust) 463 { 464 return (X509_VERIFY_PARAM_set_trust(s->param, trust)); 465 } 466 467 int 468 SSL_set_trust(SSL *s, int trust) 469 { 470 return (X509_VERIFY_PARAM_set_trust(s->param, trust)); 471 } 472 473 int 474 SSL_CTX_set1_param(SSL_CTX *ctx, X509_VERIFY_PARAM *vpm) 475 { 476 return (X509_VERIFY_PARAM_set1(ctx->param, vpm)); 477 } 478 479 int 480 SSL_set1_param(SSL *ssl, X509_VERIFY_PARAM *vpm) 481 { 482 return (X509_VERIFY_PARAM_set1(ssl->param, vpm)); 483 } 484 485 void 486 SSL_free(SSL *s) 487 { 488 int i; 489 490 if (s == NULL) 491 return; 492 493 i = CRYPTO_add(&s->references, -1, CRYPTO_LOCK_SSL); 494 if (i > 0) 495 return; 496 497 if (s->param) 498 X509_VERIFY_PARAM_free(s->param); 499 500 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->internal->ex_data); 501 502 if (s->bbio != NULL) { 503 /* If the buffering BIO is in place, pop it off */ 504 if (s->bbio == s->wbio) { 505 s->wbio = BIO_pop(s->wbio); 506 } 507 BIO_free(s->bbio); 508 s->bbio = NULL; 509 } 510 511 if (s->rbio != s->wbio) 512 BIO_free_all(s->rbio); 513 BIO_free_all(s->wbio); 514 515 if (s->internal->init_buf != NULL) 516 BUF_MEM_free(s->internal->init_buf); 517 518 /* add extra stuff */ 519 sk_SSL_CIPHER_free(s->cipher_list); 520 sk_SSL_CIPHER_free(s->internal->cipher_list_by_id); 521 522 /* Make the next call work :-) */ 523 if (s->session != NULL) { 524 ssl_clear_bad_session(s); 525 SSL_SESSION_free(s->session); 526 } 527 528 ssl_clear_cipher_ctx(s); 529 ssl_clear_hash_ctx(&s->read_hash); 530 ssl_clear_hash_ctx(&s->internal->write_hash); 531 532 ssl_cert_free(s->cert); 533 534 free(s->tlsext_hostname); 535 SSL_CTX_free(s->initial_ctx); 536 free(s->internal->tlsext_ecpointformatlist); 537 free(s->internal->tlsext_ellipticcurvelist); 538 if (s->internal->tlsext_ocsp_exts) 539 sk_X509_EXTENSION_pop_free(s->internal->tlsext_ocsp_exts, 540 X509_EXTENSION_free); 541 if (s->internal->tlsext_ocsp_ids) 542 sk_OCSP_RESPID_pop_free(s->internal->tlsext_ocsp_ids, OCSP_RESPID_free); 543 free(s->internal->tlsext_ocsp_resp); 544 545 if (s->internal->client_CA != NULL) 546 sk_X509_NAME_pop_free(s->internal->client_CA, X509_NAME_free); 547 548 if (s->method != NULL) 549 s->method->internal->ssl_free(s); 550 551 SSL_CTX_free(s->ctx); 552 553 free(s->internal->next_proto_negotiated); 554 free(s->internal->alpn_client_proto_list); 555 556 #ifndef OPENSSL_NO_SRTP 557 if (s->internal->srtp_profiles) 558 sk_SRTP_PROTECTION_PROFILE_free(s->internal->srtp_profiles); 559 #endif 560 561 free(s->internal); 562 free(s); 563 } 564 565 void 566 SSL_set_bio(SSL *s, BIO *rbio, BIO *wbio) 567 { 568 /* If the output buffering BIO is still in place, remove it */ 569 if (s->bbio != NULL) { 570 if (s->wbio == s->bbio) { 571 s->wbio = s->wbio->next_bio; 572 s->bbio->next_bio = NULL; 573 } 574 } 575 576 if (s->rbio != rbio && s->rbio != s->wbio) 577 BIO_free_all(s->rbio); 578 if (s->wbio != wbio) 579 BIO_free_all(s->wbio); 580 s->rbio = rbio; 581 s->wbio = wbio; 582 } 583 584 BIO * 585 SSL_get_rbio(const SSL *s) 586 { 587 return (s->rbio); 588 } 589 590 BIO * 591 SSL_get_wbio(const SSL *s) 592 { 593 return (s->wbio); 594 } 595 596 int 597 SSL_get_fd(const SSL *s) 598 { 599 return (SSL_get_rfd(s)); 600 } 601 602 int 603 SSL_get_rfd(const SSL *s) 604 { 605 int ret = -1; 606 BIO *b, *r; 607 608 b = SSL_get_rbio(s); 609 r = BIO_find_type(b, BIO_TYPE_DESCRIPTOR); 610 if (r != NULL) 611 BIO_get_fd(r, &ret); 612 return (ret); 613 } 614 615 int 616 SSL_get_wfd(const SSL *s) 617 { 618 int ret = -1; 619 BIO *b, *r; 620 621 b = SSL_get_wbio(s); 622 r = BIO_find_type(b, BIO_TYPE_DESCRIPTOR); 623 if (r != NULL) 624 BIO_get_fd(r, &ret); 625 return (ret); 626 } 627 628 int 629 SSL_set_fd(SSL *s, int fd) 630 { 631 int ret = 0; 632 BIO *bio = NULL; 633 634 bio = BIO_new(BIO_s_socket()); 635 636 if (bio == NULL) { 637 SSLerr(SSL_F_SSL_SET_FD, ERR_R_BUF_LIB); 638 goto err; 639 } 640 BIO_set_fd(bio, fd, BIO_NOCLOSE); 641 SSL_set_bio(s, bio, bio); 642 ret = 1; 643 err: 644 return (ret); 645 } 646 647 int 648 SSL_set_wfd(SSL *s, int fd) 649 { 650 int ret = 0; 651 BIO *bio = NULL; 652 653 if ((s->rbio == NULL) || (BIO_method_type(s->rbio) != BIO_TYPE_SOCKET) 654 || ((int)BIO_get_fd(s->rbio, NULL) != fd)) { 655 bio = BIO_new(BIO_s_socket()); 656 657 if (bio == NULL) { 658 SSLerr(SSL_F_SSL_SET_WFD, ERR_R_BUF_LIB); 659 goto err; 660 } 661 BIO_set_fd(bio, fd, BIO_NOCLOSE); 662 SSL_set_bio(s, SSL_get_rbio(s), bio); 663 } else 664 SSL_set_bio(s, SSL_get_rbio(s), SSL_get_rbio(s)); 665 ret = 1; 666 err: 667 return (ret); 668 } 669 670 int 671 SSL_set_rfd(SSL *s, int fd) 672 { 673 int ret = 0; 674 BIO *bio = NULL; 675 676 if ((s->wbio == NULL) || (BIO_method_type(s->wbio) != BIO_TYPE_SOCKET) 677 || ((int)BIO_get_fd(s->wbio, NULL) != fd)) { 678 bio = BIO_new(BIO_s_socket()); 679 680 if (bio == NULL) { 681 SSLerr(SSL_F_SSL_SET_RFD, ERR_R_BUF_LIB); 682 goto err; 683 } 684 BIO_set_fd(bio, fd, BIO_NOCLOSE); 685 SSL_set_bio(s, bio, SSL_get_wbio(s)); 686 } else 687 SSL_set_bio(s, SSL_get_wbio(s), SSL_get_wbio(s)); 688 ret = 1; 689 err: 690 return (ret); 691 } 692 693 694 /* return length of latest Finished message we sent, copy to 'buf' */ 695 size_t 696 SSL_get_finished(const SSL *s, void *buf, size_t count) 697 { 698 size_t ret = 0; 699 700 if (s->s3 != NULL) { 701 ret = S3I(s)->tmp.finish_md_len; 702 if (count > ret) 703 count = ret; 704 memcpy(buf, S3I(s)->tmp.finish_md, count); 705 } 706 return (ret); 707 } 708 709 /* return length of latest Finished message we expected, copy to 'buf' */ 710 size_t 711 SSL_get_peer_finished(const SSL *s, void *buf, size_t count) 712 { 713 size_t ret = 0; 714 715 if (s->s3 != NULL) { 716 ret = S3I(s)->tmp.peer_finish_md_len; 717 if (count > ret) 718 count = ret; 719 memcpy(buf, S3I(s)->tmp.peer_finish_md, count); 720 } 721 return (ret); 722 } 723 724 725 int 726 SSL_get_verify_mode(const SSL *s) 727 { 728 return (s->verify_mode); 729 } 730 731 int 732 SSL_get_verify_depth(const SSL *s) 733 { 734 return (X509_VERIFY_PARAM_get_depth(s->param)); 735 } 736 737 int 738 (*SSL_get_verify_callback(const SSL *s))(int, X509_STORE_CTX *) 739 { 740 return (s->internal->verify_callback); 741 } 742 743 int 744 SSL_CTX_get_verify_mode(const SSL_CTX *ctx) 745 { 746 return (ctx->verify_mode); 747 } 748 749 int 750 SSL_CTX_get_verify_depth(const SSL_CTX *ctx) 751 { 752 return (X509_VERIFY_PARAM_get_depth(ctx->param)); 753 } 754 755 int (*SSL_CTX_get_verify_callback(const SSL_CTX *ctx))(int, X509_STORE_CTX *) 756 { 757 return (ctx->internal->default_verify_callback); 758 } 759 760 void 761 SSL_set_verify(SSL *s, int mode, 762 int (*callback)(int ok, X509_STORE_CTX *ctx)) 763 { 764 s->verify_mode = mode; 765 if (callback != NULL) 766 s->internal->verify_callback = callback; 767 } 768 769 void 770 SSL_set_verify_depth(SSL *s, int depth) 771 { 772 X509_VERIFY_PARAM_set_depth(s->param, depth); 773 } 774 775 void 776 SSL_set_read_ahead(SSL *s, int yes) 777 { 778 s->internal->read_ahead = yes; 779 } 780 781 int 782 SSL_get_read_ahead(const SSL *s) 783 { 784 return (s->internal->read_ahead); 785 } 786 787 int 788 SSL_pending(const SSL *s) 789 { 790 /* 791 * SSL_pending cannot work properly if read-ahead is enabled 792 * (SSL_[CTX_]ctrl(..., SSL_CTRL_SET_READ_AHEAD, 1, NULL)), 793 * and it is impossible to fix since SSL_pending cannot report 794 * errors that may be observed while scanning the new data. 795 * (Note that SSL_pending() is often used as a boolean value, 796 * so we'd better not return -1.) 797 */ 798 return (s->method->internal->ssl_pending(s)); 799 } 800 801 X509 * 802 SSL_get_peer_certificate(const SSL *s) 803 { 804 X509 *r; 805 806 if ((s == NULL) || (s->session == NULL)) 807 r = NULL; 808 else 809 r = s->session->peer; 810 811 if (r == NULL) 812 return (r); 813 814 CRYPTO_add(&r->references, 1, CRYPTO_LOCK_X509); 815 816 return (r); 817 } 818 819 STACK_OF(X509) * 820 SSL_get_peer_cert_chain(const SSL *s) 821 { 822 STACK_OF(X509) *r; 823 824 if ((s == NULL) || (s->session == NULL) || 825 (SSI(s)->sess_cert == NULL)) 826 r = NULL; 827 else 828 r = SSI(s)->sess_cert->cert_chain; 829 830 /* 831 * If we are a client, cert_chain includes the peer's own 832 * certificate; 833 * if we are a server, it does not. 834 */ 835 return (r); 836 } 837 838 /* 839 * Now in theory, since the calling process own 't' it should be safe to 840 * modify. We need to be able to read f without being hassled 841 */ 842 void 843 SSL_copy_session_id(SSL *t, const SSL *f) 844 { 845 CERT *tmp; 846 847 /* Do we need to to SSL locking? */ 848 SSL_set_session(t, SSL_get_session(f)); 849 850 /* 851 * What if we are setup as SSLv2 but want to talk SSLv3 or 852 * vice-versa. 853 */ 854 if (t->method != f->method) { 855 t->method->internal->ssl_free(t); /* cleanup current */ 856 t->method = f->method; /* change method */ 857 t->method->internal->ssl_new(t); /* setup new */ 858 } 859 860 tmp = t->cert; 861 if (f->cert != NULL) { 862 CRYPTO_add(&f->cert->references, 1, CRYPTO_LOCK_SSL_CERT); 863 t->cert = f->cert; 864 } else 865 t->cert = NULL; 866 ssl_cert_free(tmp); 867 SSL_set_session_id_context(t, f->sid_ctx, f->sid_ctx_length); 868 } 869 870 /* Fix this so it checks all the valid key/cert options */ 871 int 872 SSL_CTX_check_private_key(const SSL_CTX *ctx) 873 { 874 if ((ctx == NULL) || (ctx->internal->cert == NULL) || 875 (ctx->internal->cert->key->x509 == NULL)) { 876 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY, 877 SSL_R_NO_CERTIFICATE_ASSIGNED); 878 return (0); 879 } 880 if (ctx->internal->cert->key->privatekey == NULL) { 881 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY, 882 SSL_R_NO_PRIVATE_KEY_ASSIGNED); 883 return (0); 884 } 885 return (X509_check_private_key(ctx->internal->cert->key->x509, 886 ctx->internal->cert->key->privatekey)); 887 } 888 889 /* Fix this function so that it takes an optional type parameter */ 890 int 891 SSL_check_private_key(const SSL *ssl) 892 { 893 if (ssl == NULL) { 894 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY, 895 ERR_R_PASSED_NULL_PARAMETER); 896 return (0); 897 } 898 if (ssl->cert == NULL) { 899 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY, 900 SSL_R_NO_CERTIFICATE_ASSIGNED); 901 return (0); 902 } 903 if (ssl->cert->key->x509 == NULL) { 904 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY, 905 SSL_R_NO_CERTIFICATE_ASSIGNED); 906 return (0); 907 } 908 if (ssl->cert->key->privatekey == NULL) { 909 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY, 910 SSL_R_NO_PRIVATE_KEY_ASSIGNED); 911 return (0); 912 } 913 return (X509_check_private_key(ssl->cert->key->x509, 914 ssl->cert->key->privatekey)); 915 } 916 917 int 918 SSL_accept(SSL *s) 919 { 920 if (s->internal->handshake_func == NULL) 921 SSL_set_accept_state(s); /* Not properly initialized yet */ 922 923 return (s->method->internal->ssl_accept(s)); 924 } 925 926 int 927 SSL_connect(SSL *s) 928 { 929 if (s->internal->handshake_func == NULL) 930 SSL_set_connect_state(s); /* Not properly initialized yet */ 931 932 return (s->method->internal->ssl_connect(s)); 933 } 934 935 long 936 SSL_get_default_timeout(const SSL *s) 937 { 938 return (s->method->internal->get_timeout()); 939 } 940 941 int 942 SSL_read(SSL *s, void *buf, int num) 943 { 944 if (s->internal->handshake_func == NULL) { 945 SSLerr(SSL_F_SSL_READ, SSL_R_UNINITIALIZED); 946 return (-1); 947 } 948 949 if (s->internal->shutdown & SSL_RECEIVED_SHUTDOWN) { 950 s->internal->rwstate = SSL_NOTHING; 951 return (0); 952 } 953 return (s->method->internal->ssl_read(s, buf, num)); 954 } 955 956 int 957 SSL_peek(SSL *s, void *buf, int num) 958 { 959 if (s->internal->handshake_func == NULL) { 960 SSLerr(SSL_F_SSL_PEEK, SSL_R_UNINITIALIZED); 961 return (-1); 962 } 963 964 if (s->internal->shutdown & SSL_RECEIVED_SHUTDOWN) { 965 return (0); 966 } 967 return (s->method->internal->ssl_peek(s, buf, num)); 968 } 969 970 int 971 SSL_write(SSL *s, const void *buf, int num) 972 { 973 if (s->internal->handshake_func == NULL) { 974 SSLerr(SSL_F_SSL_WRITE, SSL_R_UNINITIALIZED); 975 return (-1); 976 } 977 978 if (s->internal->shutdown & SSL_SENT_SHUTDOWN) { 979 s->internal->rwstate = SSL_NOTHING; 980 SSLerr(SSL_F_SSL_WRITE, SSL_R_PROTOCOL_IS_SHUTDOWN); 981 return (-1); 982 } 983 return (s->method->internal->ssl_write(s, buf, num)); 984 } 985 986 int 987 SSL_shutdown(SSL *s) 988 { 989 /* 990 * Note that this function behaves differently from what one might 991 * expect. Return values are 0 for no success (yet), 992 * 1 for success; but calling it once is usually not enough, 993 * even if blocking I/O is used (see ssl3_shutdown). 994 */ 995 996 if (s->internal->handshake_func == NULL) { 997 SSLerr(SSL_F_SSL_SHUTDOWN, SSL_R_UNINITIALIZED); 998 return (-1); 999 } 1000 1001 if ((s != NULL) && !SSL_in_init(s)) 1002 return (s->method->internal->ssl_shutdown(s)); 1003 else 1004 return (1); 1005 } 1006 1007 int 1008 SSL_renegotiate(SSL *s) 1009 { 1010 if (s->internal->renegotiate == 0) 1011 s->internal->renegotiate = 1; 1012 1013 s->internal->new_session = 1; 1014 1015 return (s->method->internal->ssl_renegotiate(s)); 1016 } 1017 1018 int 1019 SSL_renegotiate_abbreviated(SSL *s) 1020 { 1021 if (s->internal->renegotiate == 0) 1022 s->internal->renegotiate = 1; 1023 1024 s->internal->new_session = 0; 1025 1026 return (s->method->internal->ssl_renegotiate(s)); 1027 } 1028 1029 int 1030 SSL_renegotiate_pending(SSL *s) 1031 { 1032 /* 1033 * Becomes true when negotiation is requested; 1034 * false again once a handshake has finished. 1035 */ 1036 return (s->internal->renegotiate != 0); 1037 } 1038 1039 long 1040 SSL_ctrl(SSL *s, int cmd, long larg, void *parg) 1041 { 1042 long l; 1043 1044 switch (cmd) { 1045 case SSL_CTRL_GET_READ_AHEAD: 1046 return (s->internal->read_ahead); 1047 case SSL_CTRL_SET_READ_AHEAD: 1048 l = s->internal->read_ahead; 1049 s->internal->read_ahead = larg; 1050 return (l); 1051 1052 case SSL_CTRL_SET_MSG_CALLBACK_ARG: 1053 s->internal->msg_callback_arg = parg; 1054 return (1); 1055 1056 case SSL_CTRL_OPTIONS: 1057 return (s->internal->options|=larg); 1058 case SSL_CTRL_CLEAR_OPTIONS: 1059 return (s->internal->options&=~larg); 1060 case SSL_CTRL_MODE: 1061 return (s->internal->mode|=larg); 1062 case SSL_CTRL_CLEAR_MODE: 1063 return (s->internal->mode &=~larg); 1064 case SSL_CTRL_GET_MAX_CERT_LIST: 1065 return (s->internal->max_cert_list); 1066 case SSL_CTRL_SET_MAX_CERT_LIST: 1067 l = s->internal->max_cert_list; 1068 s->internal->max_cert_list = larg; 1069 return (l); 1070 case SSL_CTRL_SET_MTU: 1071 #ifndef OPENSSL_NO_DTLS1 1072 if (larg < (long)dtls1_min_mtu()) 1073 return (0); 1074 #endif 1075 if (SSL_IS_DTLS(s)) { 1076 D1I(s)->mtu = larg; 1077 return (larg); 1078 } 1079 return (0); 1080 case SSL_CTRL_SET_MAX_SEND_FRAGMENT: 1081 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH) 1082 return (0); 1083 s->max_send_fragment = larg; 1084 return (1); 1085 case SSL_CTRL_GET_RI_SUPPORT: 1086 if (s->s3) 1087 return (S3I(s)->send_connection_binding); 1088 else return (0); 1089 default: 1090 if (SSL_IS_DTLS(s)) 1091 return dtls1_ctrl(s, cmd, larg, parg); 1092 return ssl3_ctrl(s, cmd, larg, parg); 1093 } 1094 } 1095 1096 long 1097 SSL_callback_ctrl(SSL *s, int cmd, void (*fp)(void)) 1098 { 1099 switch (cmd) { 1100 case SSL_CTRL_SET_MSG_CALLBACK: 1101 s->internal->msg_callback = (void (*)(int write_p, int version, 1102 int content_type, const void *buf, size_t len, 1103 SSL *ssl, void *arg))(fp); 1104 return (1); 1105 1106 default: 1107 return (ssl3_callback_ctrl(s, cmd, fp)); 1108 } 1109 } 1110 1111 struct lhash_st_SSL_SESSION * 1112 SSL_CTX_sessions(SSL_CTX *ctx) 1113 { 1114 return (ctx->internal->sessions); 1115 } 1116 1117 long 1118 SSL_CTX_ctrl(SSL_CTX *ctx, int cmd, long larg, void *parg) 1119 { 1120 long l; 1121 1122 switch (cmd) { 1123 case SSL_CTRL_GET_READ_AHEAD: 1124 return (ctx->internal->read_ahead); 1125 case SSL_CTRL_SET_READ_AHEAD: 1126 l = ctx->internal->read_ahead; 1127 ctx->internal->read_ahead = larg; 1128 return (l); 1129 1130 case SSL_CTRL_SET_MSG_CALLBACK_ARG: 1131 ctx->internal->msg_callback_arg = parg; 1132 return (1); 1133 1134 case SSL_CTRL_GET_MAX_CERT_LIST: 1135 return (ctx->internal->max_cert_list); 1136 case SSL_CTRL_SET_MAX_CERT_LIST: 1137 l = ctx->internal->max_cert_list; 1138 ctx->internal->max_cert_list = larg; 1139 return (l); 1140 1141 case SSL_CTRL_SET_SESS_CACHE_SIZE: 1142 l = ctx->internal->session_cache_size; 1143 ctx->internal->session_cache_size = larg; 1144 return (l); 1145 case SSL_CTRL_GET_SESS_CACHE_SIZE: 1146 return (ctx->internal->session_cache_size); 1147 case SSL_CTRL_SET_SESS_CACHE_MODE: 1148 l = ctx->internal->session_cache_mode; 1149 ctx->internal->session_cache_mode = larg; 1150 return (l); 1151 case SSL_CTRL_GET_SESS_CACHE_MODE: 1152 return (ctx->internal->session_cache_mode); 1153 1154 case SSL_CTRL_SESS_NUMBER: 1155 return (lh_SSL_SESSION_num_items(ctx->internal->sessions)); 1156 case SSL_CTRL_SESS_CONNECT: 1157 return (ctx->internal->stats.sess_connect); 1158 case SSL_CTRL_SESS_CONNECT_GOOD: 1159 return (ctx->internal->stats.sess_connect_good); 1160 case SSL_CTRL_SESS_CONNECT_RENEGOTIATE: 1161 return (ctx->internal->stats.sess_connect_renegotiate); 1162 case SSL_CTRL_SESS_ACCEPT: 1163 return (ctx->internal->stats.sess_accept); 1164 case SSL_CTRL_SESS_ACCEPT_GOOD: 1165 return (ctx->internal->stats.sess_accept_good); 1166 case SSL_CTRL_SESS_ACCEPT_RENEGOTIATE: 1167 return (ctx->internal->stats.sess_accept_renegotiate); 1168 case SSL_CTRL_SESS_HIT: 1169 return (ctx->internal->stats.sess_hit); 1170 case SSL_CTRL_SESS_CB_HIT: 1171 return (ctx->internal->stats.sess_cb_hit); 1172 case SSL_CTRL_SESS_MISSES: 1173 return (ctx->internal->stats.sess_miss); 1174 case SSL_CTRL_SESS_TIMEOUTS: 1175 return (ctx->internal->stats.sess_timeout); 1176 case SSL_CTRL_SESS_CACHE_FULL: 1177 return (ctx->internal->stats.sess_cache_full); 1178 case SSL_CTRL_OPTIONS: 1179 return (ctx->internal->options|=larg); 1180 case SSL_CTRL_CLEAR_OPTIONS: 1181 return (ctx->internal->options&=~larg); 1182 case SSL_CTRL_MODE: 1183 return (ctx->internal->mode|=larg); 1184 case SSL_CTRL_CLEAR_MODE: 1185 return (ctx->internal->mode&=~larg); 1186 case SSL_CTRL_SET_MAX_SEND_FRAGMENT: 1187 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH) 1188 return (0); 1189 ctx->internal->max_send_fragment = larg; 1190 return (1); 1191 default: 1192 return (ssl3_ctx_ctrl(ctx, cmd, larg, parg)); 1193 } 1194 } 1195 1196 long 1197 SSL_CTX_callback_ctrl(SSL_CTX *ctx, int cmd, void (*fp)(void)) 1198 { 1199 switch (cmd) { 1200 case SSL_CTRL_SET_MSG_CALLBACK: 1201 ctx->internal->msg_callback = (void (*)(int write_p, int version, 1202 int content_type, const void *buf, size_t len, SSL *ssl, 1203 void *arg))(fp); 1204 return (1); 1205 1206 default: 1207 return (ssl3_ctx_callback_ctrl(ctx, cmd, fp)); 1208 } 1209 } 1210 1211 int 1212 ssl_cipher_id_cmp(const SSL_CIPHER *a, const SSL_CIPHER *b) 1213 { 1214 long l; 1215 1216 l = a->id - b->id; 1217 if (l == 0L) 1218 return (0); 1219 else 1220 return ((l > 0) ? 1:-1); 1221 } 1222 1223 int 1224 ssl_cipher_ptr_id_cmp(const SSL_CIPHER * const *ap, 1225 const SSL_CIPHER * const *bp) 1226 { 1227 long l; 1228 1229 l = (*ap)->id - (*bp)->id; 1230 if (l == 0L) 1231 return (0); 1232 else 1233 return ((l > 0) ? 1:-1); 1234 } 1235 1236 /* 1237 * Return a STACK of the ciphers available for the SSL and in order of 1238 * preference. 1239 */ 1240 STACK_OF(SSL_CIPHER) * 1241 SSL_get_ciphers(const SSL *s) 1242 { 1243 if (s != NULL) { 1244 if (s->cipher_list != NULL) { 1245 return (s->cipher_list); 1246 } else if ((s->ctx != NULL) && (s->ctx->cipher_list != NULL)) { 1247 return (s->ctx->cipher_list); 1248 } 1249 } 1250 return (NULL); 1251 } 1252 1253 /* 1254 * Return a STACK of the ciphers available for the SSL and in order of 1255 * algorithm id. 1256 */ 1257 STACK_OF(SSL_CIPHER) * 1258 ssl_get_ciphers_by_id(SSL *s) 1259 { 1260 if (s != NULL) { 1261 if (s->internal->cipher_list_by_id != NULL) { 1262 return (s->internal->cipher_list_by_id); 1263 } else if ((s->ctx != NULL) && 1264 (s->ctx->internal->cipher_list_by_id != NULL)) { 1265 return (s->ctx->internal->cipher_list_by_id); 1266 } 1267 } 1268 return (NULL); 1269 } 1270 1271 /* The old interface to get the same thing as SSL_get_ciphers(). */ 1272 const char * 1273 SSL_get_cipher_list(const SSL *s, int n) 1274 { 1275 SSL_CIPHER *c; 1276 STACK_OF(SSL_CIPHER) *sk; 1277 1278 if (s == NULL) 1279 return (NULL); 1280 sk = SSL_get_ciphers(s); 1281 if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= n)) 1282 return (NULL); 1283 c = sk_SSL_CIPHER_value(sk, n); 1284 if (c == NULL) 1285 return (NULL); 1286 return (c->name); 1287 } 1288 1289 /* Specify the ciphers to be used by default by the SSL_CTX. */ 1290 int 1291 SSL_CTX_set_cipher_list(SSL_CTX *ctx, const char *str) 1292 { 1293 STACK_OF(SSL_CIPHER) *sk; 1294 1295 sk = ssl_create_cipher_list(ctx->method, &ctx->cipher_list, 1296 &ctx->internal->cipher_list_by_id, str); 1297 /* 1298 * ssl_create_cipher_list may return an empty stack if it 1299 * was unable to find a cipher matching the given rule string 1300 * (for example if the rule string specifies a cipher which 1301 * has been disabled). This is not an error as far as 1302 * ssl_create_cipher_list is concerned, and hence 1303 * ctx->cipher_list and ctx->internal->cipher_list_by_id has been 1304 * updated. 1305 */ 1306 if (sk == NULL) 1307 return (0); 1308 else if (sk_SSL_CIPHER_num(sk) == 0) { 1309 SSLerr(SSL_F_SSL_CTX_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH); 1310 return (0); 1311 } 1312 return (1); 1313 } 1314 1315 /* Specify the ciphers to be used by the SSL. */ 1316 int 1317 SSL_set_cipher_list(SSL *s, const char *str) 1318 { 1319 STACK_OF(SSL_CIPHER) *sk; 1320 1321 sk = ssl_create_cipher_list(s->ctx->method, &s->cipher_list, 1322 &s->internal->cipher_list_by_id, str); 1323 /* see comment in SSL_CTX_set_cipher_list */ 1324 if (sk == NULL) 1325 return (0); 1326 else if (sk_SSL_CIPHER_num(sk) == 0) { 1327 SSLerr(SSL_F_SSL_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH); 1328 return (0); 1329 } 1330 return (1); 1331 } 1332 1333 /* works well for SSLv2, not so good for SSLv3 */ 1334 char * 1335 SSL_get_shared_ciphers(const SSL *s, char *buf, int len) 1336 { 1337 char *end; 1338 STACK_OF(SSL_CIPHER) *sk; 1339 SSL_CIPHER *c; 1340 size_t curlen = 0; 1341 int i; 1342 1343 if (s->session == NULL || s->session->ciphers == NULL || len < 2) 1344 return (NULL); 1345 1346 sk = s->session->ciphers; 1347 if (sk_SSL_CIPHER_num(sk) == 0) 1348 return (NULL); 1349 1350 buf[0] = '\0'; 1351 for (i = 0; i < sk_SSL_CIPHER_num(sk); i++) { 1352 c = sk_SSL_CIPHER_value(sk, i); 1353 end = buf + curlen; 1354 if (strlcat(buf, c->name, len) >= len || 1355 (curlen = strlcat(buf, ":", len)) >= len) { 1356 /* remove truncated cipher from list */ 1357 *end = '\0'; 1358 break; 1359 } 1360 } 1361 /* remove trailing colon */ 1362 if ((end = strrchr(buf, ':')) != NULL) 1363 *end = '\0'; 1364 return (buf); 1365 } 1366 1367 int 1368 ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk, unsigned char *p, 1369 size_t maxlen, size_t *outlen) 1370 { 1371 SSL_CIPHER *cipher; 1372 int ciphers = 0; 1373 CBB cbb; 1374 int i; 1375 1376 *outlen = 0; 1377 1378 if (sk == NULL) 1379 return (0); 1380 1381 if (!CBB_init_fixed(&cbb, p, maxlen)) 1382 goto err; 1383 1384 for (i = 0; i < sk_SSL_CIPHER_num(sk); i++) { 1385 cipher = sk_SSL_CIPHER_value(sk, i); 1386 1387 /* Skip TLS v1.2 only ciphersuites if lower than v1.2 */ 1388 if ((cipher->algorithm_ssl & SSL_TLSV1_2) && 1389 (TLS1_get_client_version(s) < TLS1_2_VERSION)) 1390 continue; 1391 1392 if (!CBB_add_u16(&cbb, ssl3_cipher_get_value(cipher))) 1393 goto err; 1394 1395 ciphers++; 1396 } 1397 1398 /* Add SCSV if there are other ciphers and we're not renegotiating. */ 1399 if (ciphers > 0 && !s->internal->renegotiate) { 1400 if (!CBB_add_u16(&cbb, SSL3_CK_SCSV & SSL3_CK_VALUE_MASK)) 1401 goto err; 1402 } 1403 1404 if (!CBB_finish(&cbb, NULL, outlen)) 1405 goto err; 1406 1407 return 1; 1408 1409 err: 1410 CBB_cleanup(&cbb); 1411 1412 return 0; 1413 } 1414 1415 STACK_OF(SSL_CIPHER) * 1416 ssl_bytes_to_cipher_list(SSL *s, const unsigned char *p, int num) 1417 { 1418 CBS cbs; 1419 const SSL_CIPHER *c; 1420 STACK_OF(SSL_CIPHER) *sk = NULL; 1421 unsigned long cipher_id; 1422 uint16_t cipher_value, max_version; 1423 1424 if (s->s3) 1425 S3I(s)->send_connection_binding = 0; 1426 1427 /* 1428 * RFC 5246 section 7.4.1.2 defines the interval as [2,2^16-2]. 1429 */ 1430 if (num < 2 || num > 0x10000 - 2) { 1431 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST, 1432 SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST); 1433 return (NULL); 1434 } 1435 1436 if ((sk = sk_SSL_CIPHER_new_null()) == NULL) { 1437 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST, ERR_R_MALLOC_FAILURE); 1438 goto err; 1439 } 1440 1441 CBS_init(&cbs, p, num); 1442 while (CBS_len(&cbs) > 0) { 1443 if (!CBS_get_u16(&cbs, &cipher_value)) { 1444 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST, 1445 SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST); 1446 goto err; 1447 } 1448 1449 cipher_id = SSL3_CK_ID | cipher_value; 1450 1451 if (s->s3 != NULL && cipher_id == SSL3_CK_SCSV) { 1452 /* 1453 * TLS_EMPTY_RENEGOTIATION_INFO_SCSV is fatal if 1454 * renegotiating. 1455 */ 1456 if (s->internal->renegotiate) { 1457 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST, 1458 SSL_R_SCSV_RECEIVED_WHEN_RENEGOTIATING); 1459 ssl3_send_alert(s, SSL3_AL_FATAL, 1460 SSL_AD_HANDSHAKE_FAILURE); 1461 1462 goto err; 1463 } 1464 S3I(s)->send_connection_binding = 1; 1465 continue; 1466 } 1467 1468 if (cipher_id == SSL3_CK_FALLBACK_SCSV) { 1469 /* 1470 * TLS_FALLBACK_SCSV indicates that the client 1471 * previously tried a higher protocol version. 1472 * Fail if the current version is an unexpected 1473 * downgrade. 1474 */ 1475 max_version = ssl_max_server_version(s); 1476 if (max_version == 0 || s->version < max_version) { 1477 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST, 1478 SSL_R_INAPPROPRIATE_FALLBACK); 1479 if (s->s3 != NULL) 1480 ssl3_send_alert(s, SSL3_AL_FATAL, 1481 SSL_AD_INAPPROPRIATE_FALLBACK); 1482 goto err; 1483 } 1484 continue; 1485 } 1486 1487 if ((c = ssl3_get_cipher_by_value(cipher_value)) != NULL) { 1488 if (!sk_SSL_CIPHER_push(sk, c)) { 1489 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST, 1490 ERR_R_MALLOC_FAILURE); 1491 goto err; 1492 } 1493 } 1494 } 1495 1496 return (sk); 1497 1498 err: 1499 sk_SSL_CIPHER_free(sk); 1500 1501 return (NULL); 1502 } 1503 1504 1505 /* 1506 * Return a servername extension value if provided in Client Hello, or NULL. 1507 * So far, only host_name types are defined (RFC 3546). 1508 */ 1509 const char * 1510 SSL_get_servername(const SSL *s, const int type) 1511 { 1512 if (type != TLSEXT_NAMETYPE_host_name) 1513 return (NULL); 1514 1515 return (s->session && !s->tlsext_hostname ? 1516 s->session->tlsext_hostname : 1517 s->tlsext_hostname); 1518 } 1519 1520 int 1521 SSL_get_servername_type(const SSL *s) 1522 { 1523 if (s->session && 1524 (!s->tlsext_hostname ? 1525 s->session->tlsext_hostname : s->tlsext_hostname)) 1526 return (TLSEXT_NAMETYPE_host_name); 1527 return (-1); 1528 } 1529 1530 /* 1531 * SSL_select_next_proto implements the standard protocol selection. It is 1532 * expected that this function is called from the callback set by 1533 * SSL_CTX_set_next_proto_select_cb. 1534 * 1535 * The protocol data is assumed to be a vector of 8-bit, length prefixed byte 1536 * strings. The length byte itself is not included in the length. A byte 1537 * string of length 0 is invalid. No byte string may be truncated. 1538 * 1539 * The current, but experimental algorithm for selecting the protocol is: 1540 * 1541 * 1) If the server doesn't support NPN then this is indicated to the 1542 * callback. In this case, the client application has to abort the connection 1543 * or have a default application level protocol. 1544 * 1545 * 2) If the server supports NPN, but advertises an empty list then the 1546 * client selects the first protcol in its list, but indicates via the 1547 * API that this fallback case was enacted. 1548 * 1549 * 3) Otherwise, the client finds the first protocol in the server's list 1550 * that it supports and selects this protocol. This is because it's 1551 * assumed that the server has better information about which protocol 1552 * a client should use. 1553 * 1554 * 4) If the client doesn't support any of the server's advertised 1555 * protocols, then this is treated the same as case 2. 1556 * 1557 * It returns either 1558 * OPENSSL_NPN_NEGOTIATED if a common protocol was found, or 1559 * OPENSSL_NPN_NO_OVERLAP if the fallback case was reached. 1560 */ 1561 int 1562 SSL_select_next_proto(unsigned char **out, unsigned char *outlen, 1563 const unsigned char *server, unsigned int server_len, 1564 const unsigned char *client, unsigned int client_len) 1565 { 1566 unsigned int i, j; 1567 const unsigned char *result; 1568 int status = OPENSSL_NPN_UNSUPPORTED; 1569 1570 /* 1571 * For each protocol in server preference order, 1572 * see if we support it. 1573 */ 1574 for (i = 0; i < server_len; ) { 1575 for (j = 0; j < client_len; ) { 1576 if (server[i] == client[j] && 1577 memcmp(&server[i + 1], 1578 &client[j + 1], server[i]) == 0) { 1579 /* We found a match */ 1580 result = &server[i]; 1581 status = OPENSSL_NPN_NEGOTIATED; 1582 goto found; 1583 } 1584 j += client[j]; 1585 j++; 1586 } 1587 i += server[i]; 1588 i++; 1589 } 1590 1591 /* There's no overlap between our protocols and the server's list. */ 1592 result = client; 1593 status = OPENSSL_NPN_NO_OVERLAP; 1594 1595 found: 1596 *out = (unsigned char *) result + 1; 1597 *outlen = result[0]; 1598 return (status); 1599 } 1600 1601 /* 1602 * SSL_get0_next_proto_negotiated sets *data and *len to point to the client's 1603 * requested protocol for this connection and returns 0. If the client didn't 1604 * request any protocol, then *data is set to NULL. 1605 * 1606 * Note that the client can request any protocol it chooses. The value returned 1607 * from this function need not be a member of the list of supported protocols 1608 * provided by the callback. 1609 */ 1610 void 1611 SSL_get0_next_proto_negotiated(const SSL *s, const unsigned char **data, 1612 unsigned *len) 1613 { 1614 *data = s->internal->next_proto_negotiated; 1615 if (!*data) { 1616 *len = 0; 1617 } else { 1618 *len = s->internal->next_proto_negotiated_len; 1619 } 1620 } 1621 1622 /* 1623 * SSL_CTX_set_next_protos_advertised_cb sets a callback that is called when a 1624 * TLS server needs a list of supported protocols for Next Protocol 1625 * Negotiation. The returned list must be in wire format. The list is returned 1626 * by setting |out| to point to it and |outlen| to its length. This memory will 1627 * not be modified, but one should assume that the SSL* keeps a reference to 1628 * it. 1629 * 1630 * The callback should return SSL_TLSEXT_ERR_OK if it wishes to advertise. 1631 * Otherwise, no such extension will be included in the ServerHello. 1632 */ 1633 void 1634 SSL_CTX_set_next_protos_advertised_cb(SSL_CTX *ctx, int (*cb) (SSL *ssl, 1635 const unsigned char **out, unsigned int *outlen, void *arg), void *arg) 1636 { 1637 ctx->internal->next_protos_advertised_cb = cb; 1638 ctx->internal->next_protos_advertised_cb_arg = arg; 1639 } 1640 1641 /* 1642 * SSL_CTX_set_next_proto_select_cb sets a callback that is called when a 1643 * client needs to select a protocol from the server's provided list. |out| 1644 * must be set to point to the selected protocol (which may be within |in|). 1645 * The length of the protocol name must be written into |outlen|. The server's 1646 * advertised protocols are provided in |in| and |inlen|. The callback can 1647 * assume that |in| is syntactically valid. 1648 * 1649 * The client must select a protocol. It is fatal to the connection if this 1650 * callback returns a value other than SSL_TLSEXT_ERR_OK. 1651 */ 1652 void 1653 SSL_CTX_set_next_proto_select_cb(SSL_CTX *ctx, int (*cb) (SSL *s, 1654 unsigned char **out, unsigned char *outlen, const unsigned char *in, 1655 unsigned int inlen, void *arg), void *arg) 1656 { 1657 ctx->internal->next_proto_select_cb = cb; 1658 ctx->internal->next_proto_select_cb_arg = arg; 1659 } 1660 1661 /* 1662 * SSL_CTX_set_alpn_protos sets the ALPN protocol list to the specified 1663 * protocols, which must be in wire-format (i.e. a series of non-empty, 1664 * 8-bit length-prefixed strings). Returns 0 on success. 1665 */ 1666 int 1667 SSL_CTX_set_alpn_protos(SSL_CTX *ctx, const unsigned char *protos, 1668 unsigned int protos_len) 1669 { 1670 free(ctx->internal->alpn_client_proto_list); 1671 if ((ctx->internal->alpn_client_proto_list = malloc(protos_len)) == NULL) 1672 return (1); 1673 memcpy(ctx->internal->alpn_client_proto_list, protos, protos_len); 1674 ctx->internal->alpn_client_proto_list_len = protos_len; 1675 1676 return (0); 1677 } 1678 1679 /* 1680 * SSL_set_alpn_protos sets the ALPN protocol list to the specified 1681 * protocols, which must be in wire-format (i.e. a series of non-empty, 1682 * 8-bit length-prefixed strings). Returns 0 on success. 1683 */ 1684 int 1685 SSL_set_alpn_protos(SSL *ssl, const unsigned char* protos, 1686 unsigned int protos_len) 1687 { 1688 free(ssl->internal->alpn_client_proto_list); 1689 if ((ssl->internal->alpn_client_proto_list = malloc(protos_len)) == NULL) 1690 return (1); 1691 memcpy(ssl->internal->alpn_client_proto_list, protos, protos_len); 1692 ssl->internal->alpn_client_proto_list_len = protos_len; 1693 1694 return (0); 1695 } 1696 1697 /* 1698 * SSL_CTX_set_alpn_select_cb sets a callback function that is called during 1699 * ClientHello processing in order to select an ALPN protocol from the 1700 * client's list of offered protocols. 1701 */ 1702 void 1703 SSL_CTX_set_alpn_select_cb(SSL_CTX* ctx, 1704 int (*cb) (SSL *ssl, const unsigned char **out, unsigned char *outlen, 1705 const unsigned char *in, unsigned int inlen, void *arg), void *arg) 1706 { 1707 ctx->internal->alpn_select_cb = cb; 1708 ctx->internal->alpn_select_cb_arg = arg; 1709 } 1710 1711 /* 1712 * SSL_get0_alpn_selected gets the selected ALPN protocol (if any). On return 1713 * it sets data to point to len bytes of protocol name (not including the 1714 * leading length-prefix byte). If the server didn't respond with* a negotiated 1715 * protocol then len will be zero. 1716 */ 1717 void 1718 SSL_get0_alpn_selected(const SSL *ssl, const unsigned char **data, 1719 unsigned *len) 1720 { 1721 *data = NULL; 1722 *len = 0; 1723 1724 if (ssl->s3 != NULL) { 1725 *data = ssl->s3->internal->alpn_selected; 1726 *len = ssl->s3->internal->alpn_selected_len; 1727 } 1728 } 1729 1730 int 1731 SSL_export_keying_material(SSL *s, unsigned char *out, size_t olen, 1732 const char *label, size_t llen, const unsigned char *p, size_t plen, 1733 int use_context) 1734 { 1735 return (s->method->internal->ssl3_enc->export_keying_material(s, out, olen, 1736 label, llen, p, plen, use_context)); 1737 } 1738 1739 static unsigned long 1740 ssl_session_hash(const SSL_SESSION *a) 1741 { 1742 unsigned long l; 1743 1744 l = (unsigned long) 1745 ((unsigned int) a->session_id[0] )| 1746 ((unsigned int) a->session_id[1]<< 8L)| 1747 ((unsigned long)a->session_id[2]<<16L)| 1748 ((unsigned long)a->session_id[3]<<24L); 1749 return (l); 1750 } 1751 1752 /* 1753 * NB: If this function (or indeed the hash function which uses a sort of 1754 * coarser function than this one) is changed, ensure 1755 * SSL_CTX_has_matching_session_id() is checked accordingly. It relies on being 1756 * able to construct an SSL_SESSION that will collide with any existing session 1757 * with a matching session ID. 1758 */ 1759 static int 1760 ssl_session_cmp(const SSL_SESSION *a, const SSL_SESSION *b) 1761 { 1762 if (a->ssl_version != b->ssl_version) 1763 return (1); 1764 if (a->session_id_length != b->session_id_length) 1765 return (1); 1766 if (timingsafe_memcmp(a->session_id, b->session_id, a->session_id_length) != 0) 1767 return (1); 1768 return (0); 1769 } 1770 1771 /* 1772 * These wrapper functions should remain rather than redeclaring 1773 * SSL_SESSION_hash and SSL_SESSION_cmp for void* types and casting each 1774 * variable. The reason is that the functions aren't static, they're exposed via 1775 * ssl.h. 1776 */ 1777 static unsigned long 1778 ssl_session_LHASH_HASH(const void *arg) 1779 { 1780 const SSL_SESSION *a = arg; 1781 1782 return ssl_session_hash(a); 1783 } 1784 1785 static int 1786 ssl_session_LHASH_COMP(const void *arg1, const void *arg2) 1787 { 1788 const SSL_SESSION *a = arg1; 1789 const SSL_SESSION *b = arg2; 1790 1791 return ssl_session_cmp(a, b); 1792 } 1793 1794 SSL_CTX * 1795 SSL_CTX_new(const SSL_METHOD *meth) 1796 { 1797 SSL_CTX *ret; 1798 1799 if (meth == NULL) { 1800 SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_NULL_SSL_METHOD_PASSED); 1801 return (NULL); 1802 } 1803 1804 if ((ret = calloc(1, sizeof(*ret))) == NULL) { 1805 SSLerr(SSL_F_SSL_CTX_NEW, ERR_R_MALLOC_FAILURE); 1806 return (NULL); 1807 } 1808 if ((ret->internal = calloc(1, sizeof(*ret->internal))) == NULL) { 1809 free(ret); 1810 SSLerr(SSL_F_SSL_CTX_NEW, ERR_R_MALLOC_FAILURE); 1811 return (NULL); 1812 } 1813 1814 if (SSL_get_ex_data_X509_STORE_CTX_idx() < 0) { 1815 SSLerr(SSL_F_SSL_CTX_NEW, 1816 SSL_R_X509_VERIFICATION_SETUP_PROBLEMS); 1817 goto err; 1818 } 1819 1820 ret->method = meth; 1821 1822 ret->cert_store = NULL; 1823 ret->internal->session_cache_mode = SSL_SESS_CACHE_SERVER; 1824 ret->internal->session_cache_size = SSL_SESSION_CACHE_MAX_SIZE_DEFAULT; 1825 ret->internal->session_cache_head = NULL; 1826 ret->internal->session_cache_tail = NULL; 1827 1828 /* We take the system default */ 1829 ret->session_timeout = meth->internal->get_timeout(); 1830 1831 ret->internal->new_session_cb = 0; 1832 ret->internal->remove_session_cb = 0; 1833 ret->internal->get_session_cb = 0; 1834 ret->internal->generate_session_id = 0; 1835 1836 memset((char *)&ret->internal->stats, 0, sizeof(ret->internal->stats)); 1837 1838 ret->references = 1; 1839 ret->internal->quiet_shutdown = 0; 1840 1841 ret->internal->info_callback = NULL; 1842 1843 ret->internal->app_verify_callback = 0; 1844 ret->internal->app_verify_arg = NULL; 1845 1846 ret->internal->max_cert_list = SSL_MAX_CERT_LIST_DEFAULT; 1847 ret->internal->read_ahead = 0; 1848 ret->internal->msg_callback = 0; 1849 ret->internal->msg_callback_arg = NULL; 1850 ret->verify_mode = SSL_VERIFY_NONE; 1851 ret->sid_ctx_length = 0; 1852 ret->internal->default_verify_callback = NULL; 1853 if ((ret->internal->cert = ssl_cert_new()) == NULL) 1854 goto err; 1855 1856 ret->default_passwd_callback = 0; 1857 ret->default_passwd_callback_userdata = NULL; 1858 ret->internal->client_cert_cb = 0; 1859 ret->internal->app_gen_cookie_cb = 0; 1860 ret->internal->app_verify_cookie_cb = 0; 1861 1862 ret->internal->sessions = lh_SSL_SESSION_new(); 1863 if (ret->internal->sessions == NULL) 1864 goto err; 1865 ret->cert_store = X509_STORE_new(); 1866 if (ret->cert_store == NULL) 1867 goto err; 1868 1869 ssl_create_cipher_list(ret->method, &ret->cipher_list, 1870 &ret->internal->cipher_list_by_id, SSL_DEFAULT_CIPHER_LIST); 1871 if (ret->cipher_list == NULL || 1872 sk_SSL_CIPHER_num(ret->cipher_list) <= 0) { 1873 SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_LIBRARY_HAS_NO_CIPHERS); 1874 goto err2; 1875 } 1876 1877 ret->param = X509_VERIFY_PARAM_new(); 1878 if (!ret->param) 1879 goto err; 1880 1881 if ((ret->internal->md5 = EVP_get_digestbyname("ssl3-md5")) == NULL) { 1882 SSLerr(SSL_F_SSL_CTX_NEW, 1883 SSL_R_UNABLE_TO_LOAD_SSL3_MD5_ROUTINES); 1884 goto err2; 1885 } 1886 if ((ret->internal->sha1 = EVP_get_digestbyname("ssl3-sha1")) == NULL) { 1887 SSLerr(SSL_F_SSL_CTX_NEW, 1888 SSL_R_UNABLE_TO_LOAD_SSL3_SHA1_ROUTINES); 1889 goto err2; 1890 } 1891 1892 if ((ret->internal->client_CA = sk_X509_NAME_new_null()) == NULL) 1893 goto err; 1894 1895 CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_CTX, ret, &ret->internal->ex_data); 1896 1897 ret->extra_certs = NULL; 1898 1899 ret->internal->max_send_fragment = SSL3_RT_MAX_PLAIN_LENGTH; 1900 1901 ret->internal->tlsext_servername_callback = 0; 1902 ret->internal->tlsext_servername_arg = NULL; 1903 1904 /* Setup RFC4507 ticket keys */ 1905 arc4random_buf(ret->internal->tlsext_tick_key_name, 16); 1906 arc4random_buf(ret->internal->tlsext_tick_hmac_key, 16); 1907 arc4random_buf(ret->internal->tlsext_tick_aes_key, 16); 1908 1909 ret->internal->tlsext_status_cb = 0; 1910 ret->internal->tlsext_status_arg = NULL; 1911 1912 ret->internal->next_protos_advertised_cb = 0; 1913 ret->internal->next_proto_select_cb = 0; 1914 1915 #ifndef OPENSSL_NO_ENGINE 1916 ret->internal->client_cert_engine = NULL; 1917 #ifdef OPENSSL_SSL_CLIENT_ENGINE_AUTO 1918 #define eng_strx(x) #x 1919 #define eng_str(x) eng_strx(x) 1920 /* Use specific client engine automatically... ignore errors */ 1921 { 1922 ENGINE *eng; 1923 eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO)); 1924 if (!eng) { 1925 ERR_clear_error(); 1926 ENGINE_load_builtin_engines(); 1927 eng = ENGINE_by_id(eng_str( 1928 OPENSSL_SSL_CLIENT_ENGINE_AUTO)); 1929 } 1930 if (!eng || !SSL_CTX_set_client_cert_engine(ret, eng)) 1931 ERR_clear_error(); 1932 } 1933 #endif 1934 #endif 1935 /* 1936 * Default is to connect to non-RI servers. When RI is more widely 1937 * deployed might change this. 1938 */ 1939 ret->internal->options |= SSL_OP_LEGACY_SERVER_CONNECT; 1940 1941 return (ret); 1942 err: 1943 SSLerr(SSL_F_SSL_CTX_NEW, ERR_R_MALLOC_FAILURE); 1944 err2: 1945 SSL_CTX_free(ret); 1946 return (NULL); 1947 } 1948 1949 void 1950 SSL_CTX_free(SSL_CTX *a) 1951 { 1952 int i; 1953 1954 if (a == NULL) 1955 return; 1956 1957 i = CRYPTO_add(&a->references, -1, CRYPTO_LOCK_SSL_CTX); 1958 if (i > 0) 1959 return; 1960 1961 if (a->param) 1962 X509_VERIFY_PARAM_free(a->param); 1963 1964 /* 1965 * Free internal session cache. However: the remove_cb() may reference 1966 * the ex_data of SSL_CTX, thus the ex_data store can only be removed 1967 * after the sessions were flushed. 1968 * As the ex_data handling routines might also touch the session cache, 1969 * the most secure solution seems to be: empty (flush) the cache, then 1970 * free ex_data, then finally free the cache. 1971 * (See ticket [openssl.org #212].) 1972 */ 1973 if (a->internal->sessions != NULL) 1974 SSL_CTX_flush_sessions(a, 0); 1975 1976 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_CTX, a, &a->internal->ex_data); 1977 1978 if (a->internal->sessions != NULL) 1979 lh_SSL_SESSION_free(a->internal->sessions); 1980 1981 if (a->cert_store != NULL) 1982 X509_STORE_free(a->cert_store); 1983 sk_SSL_CIPHER_free(a->cipher_list); 1984 sk_SSL_CIPHER_free(a->internal->cipher_list_by_id); 1985 ssl_cert_free(a->internal->cert); 1986 if (a->internal->client_CA != NULL) 1987 sk_X509_NAME_pop_free(a->internal->client_CA, X509_NAME_free); 1988 if (a->extra_certs != NULL) 1989 sk_X509_pop_free(a->extra_certs, X509_free); 1990 1991 #ifndef OPENSSL_NO_SRTP 1992 if (a->internal->srtp_profiles) 1993 sk_SRTP_PROTECTION_PROFILE_free(a->internal->srtp_profiles); 1994 #endif 1995 1996 #ifndef OPENSSL_NO_ENGINE 1997 if (a->internal->client_cert_engine) 1998 ENGINE_finish(a->internal->client_cert_engine); 1999 #endif 2000 2001 free(a->internal->alpn_client_proto_list); 2002 2003 free(a->internal); 2004 free(a); 2005 } 2006 2007 void 2008 SSL_CTX_set_default_passwd_cb(SSL_CTX *ctx, pem_password_cb *cb) 2009 { 2010 ctx->default_passwd_callback = cb; 2011 } 2012 2013 void 2014 SSL_CTX_set_default_passwd_cb_userdata(SSL_CTX *ctx, void *u) 2015 { 2016 ctx->default_passwd_callback_userdata = u; 2017 } 2018 2019 void 2020 SSL_CTX_set_cert_verify_callback(SSL_CTX *ctx, int (*cb)(X509_STORE_CTX *, 2021 void *), void *arg) 2022 { 2023 ctx->internal->app_verify_callback = cb; 2024 ctx->internal->app_verify_arg = arg; 2025 } 2026 2027 void 2028 SSL_CTX_set_verify(SSL_CTX *ctx, int mode, int (*cb)(int, X509_STORE_CTX *)) 2029 { 2030 ctx->verify_mode = mode; 2031 ctx->internal->default_verify_callback = cb; 2032 } 2033 2034 void 2035 SSL_CTX_set_verify_depth(SSL_CTX *ctx, int depth) 2036 { 2037 X509_VERIFY_PARAM_set_depth(ctx->param, depth); 2038 } 2039 2040 void 2041 ssl_set_cert_masks(CERT *c, const SSL_CIPHER *cipher) 2042 { 2043 int rsa_enc, rsa_sign, dh_tmp, dsa_sign; 2044 int have_ecc_cert, have_ecdh_tmp; 2045 unsigned long mask_k, mask_a; 2046 X509 *x = NULL; 2047 CERT_PKEY *cpk; 2048 2049 if (c == NULL) 2050 return; 2051 2052 dh_tmp = (c->dh_tmp != NULL || c->dh_tmp_cb != NULL || 2053 c->dh_tmp_auto != 0); 2054 2055 have_ecdh_tmp = (c->ecdh_tmp != NULL || c->ecdh_tmp_cb != NULL || 2056 c->ecdh_tmp_auto != 0); 2057 2058 cpk = &(c->pkeys[SSL_PKEY_RSA_ENC]); 2059 rsa_enc = (cpk->x509 != NULL && cpk->privatekey != NULL); 2060 cpk = &(c->pkeys[SSL_PKEY_RSA_SIGN]); 2061 rsa_sign = (cpk->x509 != NULL && cpk->privatekey != NULL); 2062 cpk = &(c->pkeys[SSL_PKEY_DSA_SIGN]); 2063 dsa_sign = (cpk->x509 != NULL && cpk->privatekey != NULL); 2064 /* FIX THIS EAY EAY EAY */ 2065 cpk = &(c->pkeys[SSL_PKEY_ECC]); 2066 have_ecc_cert = (cpk->x509 != NULL && cpk->privatekey != NULL); 2067 mask_k = 0; 2068 mask_a = 0; 2069 2070 cpk = &(c->pkeys[SSL_PKEY_GOST01]); 2071 if (cpk->x509 != NULL && cpk->privatekey !=NULL) { 2072 mask_k |= SSL_kGOST; 2073 mask_a |= SSL_aGOST01; 2074 } 2075 2076 if (rsa_enc) 2077 mask_k|=SSL_kRSA; 2078 2079 if (dh_tmp) 2080 mask_k|=SSL_kDHE; 2081 2082 if (rsa_enc || rsa_sign) 2083 mask_a|=SSL_aRSA; 2084 2085 if (dsa_sign) 2086 mask_a|=SSL_aDSS; 2087 2088 mask_a|=SSL_aNULL; 2089 2090 /* 2091 * An ECC certificate may be usable for ECDH and/or 2092 * ECDSA cipher suites depending on the key usage extension. 2093 */ 2094 if (have_ecc_cert) { 2095 x = (c->pkeys[SSL_PKEY_ECC]).x509; 2096 2097 /* This call populates extension flags (ex_flags). */ 2098 X509_check_purpose(x, -1, 0); 2099 2100 /* Key usage, if present, must allow signing. */ 2101 if ((x->ex_flags & EXFLAG_KUSAGE) == 0 || 2102 (x->ex_kusage & X509v3_KU_DIGITAL_SIGNATURE)) 2103 mask_a|=SSL_aECDSA; 2104 } 2105 2106 if (have_ecdh_tmp) 2107 mask_k|=SSL_kECDHE; 2108 2109 c->mask_k = mask_k; 2110 c->mask_a = mask_a; 2111 c->valid = 1; 2112 } 2113 2114 int 2115 ssl_check_srvr_ecc_cert_and_alg(X509 *x, SSL *s) 2116 { 2117 const SSL_CIPHER *cs = S3I(s)->tmp.new_cipher; 2118 unsigned long alg_a; 2119 2120 alg_a = cs->algorithm_auth; 2121 2122 if (alg_a & SSL_aECDSA) { 2123 /* This call populates extension flags (ex_flags). */ 2124 X509_check_purpose(x, -1, 0); 2125 2126 /* Key usage, if present, must allow signing. */ 2127 if ((x->ex_flags & EXFLAG_KUSAGE) && 2128 ((x->ex_kusage & X509v3_KU_DIGITAL_SIGNATURE) == 0)) { 2129 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, 2130 SSL_R_ECC_CERT_NOT_FOR_SIGNING); 2131 return (0); 2132 } 2133 } 2134 2135 return (1); 2136 } 2137 2138 CERT_PKEY * 2139 ssl_get_server_send_pkey(const SSL *s) 2140 { 2141 unsigned long alg_a; 2142 CERT *c; 2143 int i; 2144 2145 c = s->cert; 2146 ssl_set_cert_masks(c, S3I(s)->tmp.new_cipher); 2147 2148 alg_a = S3I(s)->tmp.new_cipher->algorithm_auth; 2149 2150 if (alg_a & SSL_aECDSA) { 2151 i = SSL_PKEY_ECC; 2152 } else if (alg_a & SSL_aDSS) { 2153 i = SSL_PKEY_DSA_SIGN; 2154 } else if (alg_a & SSL_aRSA) { 2155 if (c->pkeys[SSL_PKEY_RSA_ENC].x509 == NULL) 2156 i = SSL_PKEY_RSA_SIGN; 2157 else 2158 i = SSL_PKEY_RSA_ENC; 2159 } else if (alg_a & SSL_aGOST01) { 2160 i = SSL_PKEY_GOST01; 2161 } else { /* if (alg_a & SSL_aNULL) */ 2162 SSLerr(SSL_F_SSL_GET_SERVER_SEND_PKEY, ERR_R_INTERNAL_ERROR); 2163 return (NULL); 2164 } 2165 2166 return (c->pkeys + i); 2167 } 2168 2169 X509 * 2170 ssl_get_server_send_cert(const SSL *s) 2171 { 2172 CERT_PKEY *cpk; 2173 2174 cpk = ssl_get_server_send_pkey(s); 2175 if (!cpk) 2176 return (NULL); 2177 return (cpk->x509); 2178 } 2179 2180 EVP_PKEY * 2181 ssl_get_sign_pkey(SSL *s, const SSL_CIPHER *cipher, const EVP_MD **pmd) 2182 { 2183 unsigned long alg_a; 2184 CERT *c; 2185 int idx = -1; 2186 2187 alg_a = cipher->algorithm_auth; 2188 c = s->cert; 2189 2190 if ((alg_a & SSL_aDSS) && 2191 (c->pkeys[SSL_PKEY_DSA_SIGN].privatekey != NULL)) 2192 idx = SSL_PKEY_DSA_SIGN; 2193 else if (alg_a & SSL_aRSA) { 2194 if (c->pkeys[SSL_PKEY_RSA_SIGN].privatekey != NULL) 2195 idx = SSL_PKEY_RSA_SIGN; 2196 else if (c->pkeys[SSL_PKEY_RSA_ENC].privatekey != NULL) 2197 idx = SSL_PKEY_RSA_ENC; 2198 } else if ((alg_a & SSL_aECDSA) && 2199 (c->pkeys[SSL_PKEY_ECC].privatekey != NULL)) 2200 idx = SSL_PKEY_ECC; 2201 if (idx == -1) { 2202 SSLerr(SSL_F_SSL_GET_SIGN_PKEY, ERR_R_INTERNAL_ERROR); 2203 return (NULL); 2204 } 2205 if (pmd) 2206 *pmd = c->pkeys[idx].digest; 2207 return (c->pkeys[idx].privatekey); 2208 } 2209 2210 DH * 2211 ssl_get_auto_dh(SSL *s) 2212 { 2213 CERT_PKEY *cpk; 2214 int keylen; 2215 DH *dhp; 2216 2217 if (s->cert->dh_tmp_auto == 2) { 2218 keylen = 1024; 2219 } else if (S3I(s)->tmp.new_cipher->algorithm_auth & SSL_aNULL) { 2220 keylen = 1024; 2221 if (S3I(s)->tmp.new_cipher->strength_bits == 256) 2222 keylen = 3072; 2223 } else { 2224 if ((cpk = ssl_get_server_send_pkey(s)) == NULL) 2225 return (NULL); 2226 if (cpk->privatekey == NULL || cpk->privatekey->pkey.dh == NULL) 2227 return (NULL); 2228 keylen = EVP_PKEY_bits(cpk->privatekey); 2229 } 2230 2231 if ((dhp = DH_new()) == NULL) 2232 return (NULL); 2233 2234 dhp->g = BN_new(); 2235 if (dhp->g != NULL) 2236 BN_set_word(dhp->g, 2); 2237 2238 if (keylen >= 8192) 2239 dhp->p = get_rfc3526_prime_8192(NULL); 2240 else if (keylen >= 4096) 2241 dhp->p = get_rfc3526_prime_4096(NULL); 2242 else if (keylen >= 3072) 2243 dhp->p = get_rfc3526_prime_3072(NULL); 2244 else if (keylen >= 2048) 2245 dhp->p = get_rfc3526_prime_2048(NULL); 2246 else if (keylen >= 1536) 2247 dhp->p = get_rfc3526_prime_1536(NULL); 2248 else 2249 dhp->p = get_rfc2409_prime_1024(NULL); 2250 2251 if (dhp->p == NULL || dhp->g == NULL) { 2252 DH_free(dhp); 2253 return (NULL); 2254 } 2255 return (dhp); 2256 } 2257 2258 void 2259 ssl_update_cache(SSL *s, int mode) 2260 { 2261 int i; 2262 2263 /* 2264 * If the session_id_length is 0, we are not supposed to cache it, 2265 * and it would be rather hard to do anyway :-) 2266 */ 2267 if (s->session->session_id_length == 0) 2268 return; 2269 2270 i = s->session_ctx->internal->session_cache_mode; 2271 if ((i & mode) && (!s->internal->hit) && ((i & SSL_SESS_CACHE_NO_INTERNAL_STORE) 2272 || SSL_CTX_add_session(s->session_ctx, s->session)) 2273 && (s->session_ctx->internal->new_session_cb != NULL)) { 2274 CRYPTO_add(&s->session->references, 1, CRYPTO_LOCK_SSL_SESSION); 2275 if (!s->session_ctx->internal->new_session_cb(s, s->session)) 2276 SSL_SESSION_free(s->session); 2277 } 2278 2279 /* auto flush every 255 connections */ 2280 if ((!(i & SSL_SESS_CACHE_NO_AUTO_CLEAR)) && 2281 ((i & mode) == mode)) { 2282 if ((((mode & SSL_SESS_CACHE_CLIENT) ? 2283 s->session_ctx->internal->stats.sess_connect_good : 2284 s->session_ctx->internal->stats.sess_accept_good) & 0xff) == 0xff) { 2285 SSL_CTX_flush_sessions(s->session_ctx, time(NULL)); 2286 } 2287 } 2288 } 2289 2290 const SSL_METHOD * 2291 SSL_get_ssl_method(SSL *s) 2292 { 2293 return (s->method); 2294 } 2295 2296 int 2297 SSL_set_ssl_method(SSL *s, const SSL_METHOD *meth) 2298 { 2299 int conn = -1; 2300 int ret = 1; 2301 2302 if (s->method != meth) { 2303 if (s->internal->handshake_func != NULL) 2304 conn = (s->internal->handshake_func == s->method->internal->ssl_connect); 2305 2306 if (s->method->internal->version == meth->internal->version) 2307 s->method = meth; 2308 else { 2309 s->method->internal->ssl_free(s); 2310 s->method = meth; 2311 ret = s->method->internal->ssl_new(s); 2312 } 2313 2314 if (conn == 1) 2315 s->internal->handshake_func = meth->internal->ssl_connect; 2316 else if (conn == 0) 2317 s->internal->handshake_func = meth->internal->ssl_accept; 2318 } 2319 return (ret); 2320 } 2321 2322 int 2323 SSL_get_error(const SSL *s, int i) 2324 { 2325 int reason; 2326 unsigned long l; 2327 BIO *bio; 2328 2329 if (i > 0) 2330 return (SSL_ERROR_NONE); 2331 2332 /* Make things return SSL_ERROR_SYSCALL when doing SSL_do_handshake 2333 * etc, where we do encode the error */ 2334 if ((l = ERR_peek_error()) != 0) { 2335 if (ERR_GET_LIB(l) == ERR_LIB_SYS) 2336 return (SSL_ERROR_SYSCALL); 2337 else 2338 return (SSL_ERROR_SSL); 2339 } 2340 2341 if ((i < 0) && SSL_want_read(s)) { 2342 bio = SSL_get_rbio(s); 2343 if (BIO_should_read(bio)) { 2344 return (SSL_ERROR_WANT_READ); 2345 } else if (BIO_should_write(bio)) { 2346 /* 2347 * This one doesn't make too much sense... We never 2348 * try to write to the rbio, and an application 2349 * program where rbio and wbio are separate couldn't 2350 * even know what it should wait for. However if we 2351 * ever set s->internal->rwstate incorrectly (so that we have 2352 * SSL_want_read(s) instead of SSL_want_write(s)) 2353 * and rbio and wbio *are* the same, this test works 2354 * around that bug; so it might be safer to keep it. 2355 */ 2356 return (SSL_ERROR_WANT_WRITE); 2357 } else if (BIO_should_io_special(bio)) { 2358 reason = BIO_get_retry_reason(bio); 2359 if (reason == BIO_RR_CONNECT) 2360 return (SSL_ERROR_WANT_CONNECT); 2361 else if (reason == BIO_RR_ACCEPT) 2362 return (SSL_ERROR_WANT_ACCEPT); 2363 else 2364 return (SSL_ERROR_SYSCALL); /* unknown */ 2365 } 2366 } 2367 2368 if ((i < 0) && SSL_want_write(s)) { 2369 bio = SSL_get_wbio(s); 2370 if (BIO_should_write(bio)) { 2371 return (SSL_ERROR_WANT_WRITE); 2372 } else if (BIO_should_read(bio)) { 2373 /* 2374 * See above (SSL_want_read(s) with 2375 * BIO_should_write(bio)) 2376 */ 2377 return (SSL_ERROR_WANT_READ); 2378 } else if (BIO_should_io_special(bio)) { 2379 reason = BIO_get_retry_reason(bio); 2380 if (reason == BIO_RR_CONNECT) 2381 return (SSL_ERROR_WANT_CONNECT); 2382 else if (reason == BIO_RR_ACCEPT) 2383 return (SSL_ERROR_WANT_ACCEPT); 2384 else 2385 return (SSL_ERROR_SYSCALL); 2386 } 2387 } 2388 if ((i < 0) && SSL_want_x509_lookup(s)) { 2389 return (SSL_ERROR_WANT_X509_LOOKUP); 2390 } 2391 2392 if (i == 0) { 2393 if ((s->internal->shutdown & SSL_RECEIVED_SHUTDOWN) && 2394 (S3I(s)->warn_alert == SSL_AD_CLOSE_NOTIFY)) 2395 return (SSL_ERROR_ZERO_RETURN); 2396 } 2397 return (SSL_ERROR_SYSCALL); 2398 } 2399 2400 int 2401 SSL_do_handshake(SSL *s) 2402 { 2403 int ret = 1; 2404 2405 if (s->internal->handshake_func == NULL) { 2406 SSLerr(SSL_F_SSL_DO_HANDSHAKE, SSL_R_CONNECTION_TYPE_NOT_SET); 2407 return (-1); 2408 } 2409 2410 s->method->internal->ssl_renegotiate_check(s); 2411 2412 if (SSL_in_init(s) || SSL_in_before(s)) { 2413 ret = s->internal->handshake_func(s); 2414 } 2415 return (ret); 2416 } 2417 2418 /* 2419 * For the next 2 functions, SSL_clear() sets shutdown and so 2420 * one of these calls will reset it 2421 */ 2422 void 2423 SSL_set_accept_state(SSL *s) 2424 { 2425 s->server = 1; 2426 s->internal->shutdown = 0; 2427 s->internal->state = SSL_ST_ACCEPT|SSL_ST_BEFORE; 2428 s->internal->handshake_func = s->method->internal->ssl_accept; 2429 /* clear the current cipher */ 2430 ssl_clear_cipher_ctx(s); 2431 ssl_clear_hash_ctx(&s->read_hash); 2432 ssl_clear_hash_ctx(&s->internal->write_hash); 2433 } 2434 2435 void 2436 SSL_set_connect_state(SSL *s) 2437 { 2438 s->server = 0; 2439 s->internal->shutdown = 0; 2440 s->internal->state = SSL_ST_CONNECT|SSL_ST_BEFORE; 2441 s->internal->handshake_func = s->method->internal->ssl_connect; 2442 /* clear the current cipher */ 2443 ssl_clear_cipher_ctx(s); 2444 ssl_clear_hash_ctx(&s->read_hash); 2445 ssl_clear_hash_ctx(&s->internal->write_hash); 2446 } 2447 2448 int 2449 ssl_undefined_function(SSL *s) 2450 { 2451 SSLerr(SSL_F_SSL_UNDEFINED_FUNCTION, 2452 ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); 2453 return (0); 2454 } 2455 2456 int 2457 ssl_undefined_void_function(void) 2458 { 2459 SSLerr(SSL_F_SSL_UNDEFINED_VOID_FUNCTION, 2460 ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); 2461 return (0); 2462 } 2463 2464 int 2465 ssl_undefined_const_function(const SSL *s) 2466 { 2467 SSLerr(SSL_F_SSL_UNDEFINED_CONST_FUNCTION, 2468 ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); 2469 return (0); 2470 } 2471 2472 const char * 2473 ssl_version_string(int ver) 2474 { 2475 switch (ver) { 2476 case DTLS1_VERSION: 2477 return (SSL_TXT_DTLS1); 2478 case TLS1_VERSION: 2479 return (SSL_TXT_TLSV1); 2480 case TLS1_1_VERSION: 2481 return (SSL_TXT_TLSV1_1); 2482 case TLS1_2_VERSION: 2483 return (SSL_TXT_TLSV1_2); 2484 default: 2485 return ("unknown"); 2486 } 2487 } 2488 2489 const char * 2490 SSL_get_version(const SSL *s) 2491 { 2492 return ssl_version_string(s->version); 2493 } 2494 2495 int 2496 ssl_enabled_version_range(SSL *s, uint16_t *min_ver, uint16_t *max_ver) 2497 { 2498 uint16_t min_version, max_version; 2499 2500 /* 2501 * The enabled versions have to be a contiguous range, which means we 2502 * cannot enable and disable single versions at our whim, even though 2503 * this is what the OpenSSL flags allow. The historical way this has 2504 * been handled is by making a flag mean that all higher versions 2505 * are disabled, if any version lower than the flag is enabled. 2506 */ 2507 2508 min_version = 0; 2509 max_version = TLS1_2_VERSION; 2510 2511 if ((s->internal->options & SSL_OP_NO_TLSv1) == 0) 2512 min_version = TLS1_VERSION; 2513 else if ((s->internal->options & SSL_OP_NO_TLSv1_1) == 0) 2514 min_version = TLS1_1_VERSION; 2515 else if ((s->internal->options & SSL_OP_NO_TLSv1_2) == 0) 2516 min_version = TLS1_2_VERSION; 2517 2518 if ((s->internal->options & SSL_OP_NO_TLSv1_2) && min_version < TLS1_2_VERSION) 2519 max_version = TLS1_1_VERSION; 2520 if ((s->internal->options & SSL_OP_NO_TLSv1_1) && min_version < TLS1_1_VERSION) 2521 max_version = TLS1_VERSION; 2522 if ((s->internal->options & SSL_OP_NO_TLSv1) && min_version < TLS1_VERSION) 2523 max_version = 0; 2524 2525 /* Everything has been disabled... */ 2526 if (min_version == 0 || max_version == 0) 2527 return 0; 2528 2529 if (min_ver != NULL) 2530 *min_ver = min_version; 2531 if (max_ver != NULL) 2532 *max_ver = max_version; 2533 2534 return 1; 2535 } 2536 2537 int 2538 ssl_max_shared_version(SSL *s, uint16_t peer_ver, uint16_t *max_ver) 2539 { 2540 uint16_t min_version, max_version, shared_version; 2541 2542 *max_ver = 0; 2543 2544 if (peer_ver >= TLS1_2_VERSION) 2545 shared_version = TLS1_2_VERSION; 2546 else if (peer_ver >= TLS1_1_VERSION) 2547 shared_version = TLS1_1_VERSION; 2548 else if (peer_ver >= TLS1_VERSION) 2549 shared_version = TLS1_VERSION; 2550 else 2551 return 0; 2552 2553 if (!ssl_enabled_version_range(s, &min_version, &max_version)) 2554 return 0; 2555 2556 if (shared_version < min_version) 2557 return 0; 2558 2559 if (shared_version > max_version) 2560 shared_version = max_version; 2561 2562 *max_ver = shared_version; 2563 2564 return 1; 2565 } 2566 2567 uint16_t 2568 ssl_max_server_version(SSL *s) 2569 { 2570 uint16_t max_version; 2571 2572 /* 2573 * The SSL method will be changed during version negotiation, as such 2574 * we want to use the SSL method from the context. 2575 */ 2576 max_version = s->ctx->method->internal->version; 2577 2578 if (SSL_IS_DTLS(s)) 2579 return (DTLS1_VERSION); 2580 2581 if ((s->internal->options & SSL_OP_NO_TLSv1_2) == 0 && 2582 max_version >= TLS1_2_VERSION) 2583 return (TLS1_2_VERSION); 2584 if ((s->internal->options & SSL_OP_NO_TLSv1_1) == 0 && 2585 max_version >= TLS1_1_VERSION) 2586 return (TLS1_1_VERSION); 2587 if ((s->internal->options & SSL_OP_NO_TLSv1) == 0 && 2588 max_version >= TLS1_VERSION) 2589 return (TLS1_VERSION); 2590 2591 return (0); 2592 } 2593 2594 SSL * 2595 SSL_dup(SSL *s) 2596 { 2597 STACK_OF(X509_NAME) *sk; 2598 X509_NAME *xn; 2599 SSL *ret; 2600 int i; 2601 2602 if ((ret = SSL_new(SSL_get_SSL_CTX(s))) == NULL) 2603 return (NULL); 2604 2605 ret->version = s->version; 2606 ret->internal->type = s->internal->type; 2607 ret->method = s->method; 2608 2609 if (s->session != NULL) { 2610 /* This copies session-id, SSL_METHOD, sid_ctx, and 'cert' */ 2611 SSL_copy_session_id(ret, s); 2612 } else { 2613 /* 2614 * No session has been established yet, so we have to expect 2615 * that s->cert or ret->cert will be changed later -- 2616 * they should not both point to the same object, 2617 * and thus we can't use SSL_copy_session_id. 2618 */ 2619 2620 ret->method->internal->ssl_free(ret); 2621 ret->method = s->method; 2622 ret->method->internal->ssl_new(ret); 2623 2624 if (s->cert != NULL) { 2625 ssl_cert_free(ret->cert); 2626 ret->cert = ssl_cert_dup(s->cert); 2627 if (ret->cert == NULL) 2628 goto err; 2629 } 2630 2631 SSL_set_session_id_context(ret, 2632 s->sid_ctx, s->sid_ctx_length); 2633 } 2634 2635 ret->internal->options = s->internal->options; 2636 ret->internal->mode = s->internal->mode; 2637 SSL_set_max_cert_list(ret, SSL_get_max_cert_list(s)); 2638 SSL_set_read_ahead(ret, SSL_get_read_ahead(s)); 2639 ret->internal->msg_callback = s->internal->msg_callback; 2640 ret->internal->msg_callback_arg = s->internal->msg_callback_arg; 2641 SSL_set_verify(ret, SSL_get_verify_mode(s), 2642 SSL_get_verify_callback(s)); 2643 SSL_set_verify_depth(ret, SSL_get_verify_depth(s)); 2644 ret->internal->generate_session_id = s->internal->generate_session_id; 2645 2646 SSL_set_info_callback(ret, SSL_get_info_callback(s)); 2647 2648 ret->internal->debug = s->internal->debug; 2649 2650 /* copy app data, a little dangerous perhaps */ 2651 if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_SSL, 2652 &ret->internal->ex_data, &s->internal->ex_data)) 2653 goto err; 2654 2655 /* setup rbio, and wbio */ 2656 if (s->rbio != NULL) { 2657 if (!BIO_dup_state(s->rbio,(char *)&ret->rbio)) 2658 goto err; 2659 } 2660 if (s->wbio != NULL) { 2661 if (s->wbio != s->rbio) { 2662 if (!BIO_dup_state(s->wbio,(char *)&ret->wbio)) 2663 goto err; 2664 } else 2665 ret->wbio = ret->rbio; 2666 } 2667 ret->internal->rwstate = s->internal->rwstate; 2668 ret->internal->in_handshake = s->internal->in_handshake; 2669 ret->internal->handshake_func = s->internal->handshake_func; 2670 ret->server = s->server; 2671 ret->internal->renegotiate = s->internal->renegotiate; 2672 ret->internal->new_session = s->internal->new_session; 2673 ret->internal->quiet_shutdown = s->internal->quiet_shutdown; 2674 ret->internal->shutdown = s->internal->shutdown; 2675 /* SSL_dup does not really work at any state, though */ 2676 ret->internal->state = s->internal->state; 2677 ret->internal->rstate = s->internal->rstate; 2678 2679 /* 2680 * Would have to copy ret->init_buf, ret->init_msg, ret->init_num, 2681 * ret->init_off 2682 */ 2683 ret->internal->init_num = 0; 2684 2685 ret->internal->hit = s->internal->hit; 2686 2687 X509_VERIFY_PARAM_inherit(ret->param, s->param); 2688 2689 /* dup the cipher_list and cipher_list_by_id stacks */ 2690 if (s->cipher_list != NULL) { 2691 if ((ret->cipher_list = 2692 sk_SSL_CIPHER_dup(s->cipher_list)) == NULL) 2693 goto err; 2694 } 2695 if (s->internal->cipher_list_by_id != NULL) { 2696 if ((ret->internal->cipher_list_by_id = 2697 sk_SSL_CIPHER_dup(s->internal->cipher_list_by_id)) == NULL) 2698 goto err; 2699 } 2700 2701 /* Dup the client_CA list */ 2702 if (s->internal->client_CA != NULL) { 2703 if ((sk = sk_X509_NAME_dup(s->internal->client_CA)) == NULL) goto err; 2704 ret->internal->client_CA = sk; 2705 for (i = 0; i < sk_X509_NAME_num(sk); i++) { 2706 xn = sk_X509_NAME_value(sk, i); 2707 if (sk_X509_NAME_set(sk, i, 2708 X509_NAME_dup(xn)) == NULL) { 2709 X509_NAME_free(xn); 2710 goto err; 2711 } 2712 } 2713 } 2714 2715 if (0) { 2716 err: 2717 if (ret != NULL) 2718 SSL_free(ret); 2719 ret = NULL; 2720 } 2721 return (ret); 2722 } 2723 2724 void 2725 ssl_clear_cipher_ctx(SSL *s) 2726 { 2727 EVP_CIPHER_CTX_free(s->enc_read_ctx); 2728 s->enc_read_ctx = NULL; 2729 EVP_CIPHER_CTX_free(s->internal->enc_write_ctx); 2730 s->internal->enc_write_ctx = NULL; 2731 2732 if (s->internal->aead_read_ctx != NULL) { 2733 EVP_AEAD_CTX_cleanup(&s->internal->aead_read_ctx->ctx); 2734 free(s->internal->aead_read_ctx); 2735 s->internal->aead_read_ctx = NULL; 2736 } 2737 if (s->internal->aead_write_ctx != NULL) { 2738 EVP_AEAD_CTX_cleanup(&s->internal->aead_write_ctx->ctx); 2739 free(s->internal->aead_write_ctx); 2740 s->internal->aead_write_ctx = NULL; 2741 } 2742 2743 } 2744 2745 /* Fix this function so that it takes an optional type parameter */ 2746 X509 * 2747 SSL_get_certificate(const SSL *s) 2748 { 2749 if (s->cert != NULL) 2750 return (s->cert->key->x509); 2751 else 2752 return (NULL); 2753 } 2754 2755 /* Fix this function so that it takes an optional type parameter */ 2756 EVP_PKEY * 2757 SSL_get_privatekey(SSL *s) 2758 { 2759 if (s->cert != NULL) 2760 return (s->cert->key->privatekey); 2761 else 2762 return (NULL); 2763 } 2764 2765 const SSL_CIPHER * 2766 SSL_get_current_cipher(const SSL *s) 2767 { 2768 if ((s->session != NULL) && (s->session->cipher != NULL)) 2769 return (s->session->cipher); 2770 return (NULL); 2771 } 2772 const void * 2773 SSL_get_current_compression(SSL *s) 2774 { 2775 return (NULL); 2776 } 2777 2778 const void * 2779 SSL_get_current_expansion(SSL *s) 2780 { 2781 return (NULL); 2782 } 2783 2784 int 2785 ssl_init_wbio_buffer(SSL *s, int push) 2786 { 2787 BIO *bbio; 2788 2789 if (s->bbio == NULL) { 2790 bbio = BIO_new(BIO_f_buffer()); 2791 if (bbio == NULL) 2792 return (0); 2793 s->bbio = bbio; 2794 } else { 2795 bbio = s->bbio; 2796 if (s->bbio == s->wbio) 2797 s->wbio = BIO_pop(s->wbio); 2798 } 2799 (void)BIO_reset(bbio); 2800 /* if (!BIO_set_write_buffer_size(bbio,16*1024)) */ 2801 if (!BIO_set_read_buffer_size(bbio, 1)) { 2802 SSLerr(SSL_F_SSL_INIT_WBIO_BUFFER, ERR_R_BUF_LIB); 2803 return (0); 2804 } 2805 if (push) { 2806 if (s->wbio != bbio) 2807 s->wbio = BIO_push(bbio, s->wbio); 2808 } else { 2809 if (s->wbio == bbio) 2810 s->wbio = BIO_pop(bbio); 2811 } 2812 return (1); 2813 } 2814 2815 void 2816 ssl_free_wbio_buffer(SSL *s) 2817 { 2818 if (s == NULL) 2819 return; 2820 2821 if (s->bbio == NULL) 2822 return; 2823 2824 if (s->bbio == s->wbio) { 2825 /* remove buffering */ 2826 s->wbio = BIO_pop(s->wbio); 2827 } 2828 BIO_free(s->bbio); 2829 s->bbio = NULL; 2830 } 2831 2832 void 2833 SSL_CTX_set_quiet_shutdown(SSL_CTX *ctx, int mode) 2834 { 2835 ctx->internal->quiet_shutdown = mode; 2836 } 2837 2838 int 2839 SSL_CTX_get_quiet_shutdown(const SSL_CTX *ctx) 2840 { 2841 return (ctx->internal->quiet_shutdown); 2842 } 2843 2844 void 2845 SSL_set_quiet_shutdown(SSL *s, int mode) 2846 { 2847 s->internal->quiet_shutdown = mode; 2848 } 2849 2850 int 2851 SSL_get_quiet_shutdown(const SSL *s) 2852 { 2853 return (s->internal->quiet_shutdown); 2854 } 2855 2856 void 2857 SSL_set_shutdown(SSL *s, int mode) 2858 { 2859 s->internal->shutdown = mode; 2860 } 2861 2862 int 2863 SSL_get_shutdown(const SSL *s) 2864 { 2865 return (s->internal->shutdown); 2866 } 2867 2868 int 2869 SSL_version(const SSL *s) 2870 { 2871 return (s->version); 2872 } 2873 2874 SSL_CTX * 2875 SSL_get_SSL_CTX(const SSL *ssl) 2876 { 2877 return (ssl->ctx); 2878 } 2879 2880 SSL_CTX * 2881 SSL_set_SSL_CTX(SSL *ssl, SSL_CTX* ctx) 2882 { 2883 CERT *ocert = ssl->cert; 2884 2885 if (ssl->ctx == ctx) 2886 return (ssl->ctx); 2887 if (ctx == NULL) 2888 ctx = ssl->initial_ctx; 2889 ssl->cert = ssl_cert_dup(ctx->internal->cert); 2890 if (ocert != NULL) { 2891 int i; 2892 /* Copy negotiated digests from original certificate. */ 2893 for (i = 0; i < SSL_PKEY_NUM; i++) 2894 ssl->cert->pkeys[i].digest = ocert->pkeys[i].digest; 2895 ssl_cert_free(ocert); 2896 } 2897 CRYPTO_add(&ctx->references, 1, CRYPTO_LOCK_SSL_CTX); 2898 SSL_CTX_free(ssl->ctx); /* decrement reference count */ 2899 ssl->ctx = ctx; 2900 return (ssl->ctx); 2901 } 2902 2903 int 2904 SSL_CTX_set_default_verify_paths(SSL_CTX *ctx) 2905 { 2906 return (X509_STORE_set_default_paths(ctx->cert_store)); 2907 } 2908 2909 int 2910 SSL_CTX_load_verify_locations(SSL_CTX *ctx, const char *CAfile, 2911 const char *CApath) 2912 { 2913 return (X509_STORE_load_locations(ctx->cert_store, CAfile, CApath)); 2914 } 2915 2916 int 2917 SSL_CTX_load_verify_mem(SSL_CTX *ctx, void *buf, int len) 2918 { 2919 return (X509_STORE_load_mem(ctx->cert_store, buf, len)); 2920 } 2921 2922 void 2923 SSL_set_info_callback(SSL *ssl, void (*cb)(const SSL *ssl, int type, int val)) 2924 { 2925 ssl->internal->info_callback = cb; 2926 } 2927 2928 void (*SSL_get_info_callback(const SSL *ssl))(const SSL *ssl, int type, int val) 2929 { 2930 return (ssl->internal->info_callback); 2931 } 2932 2933 int 2934 SSL_state(const SSL *ssl) 2935 { 2936 return (ssl->internal->state); 2937 } 2938 2939 void 2940 SSL_set_state(SSL *ssl, int state) 2941 { 2942 ssl->internal->state = state; 2943 } 2944 2945 void 2946 SSL_set_verify_result(SSL *ssl, long arg) 2947 { 2948 ssl->verify_result = arg; 2949 } 2950 2951 long 2952 SSL_get_verify_result(const SSL *ssl) 2953 { 2954 return (ssl->verify_result); 2955 } 2956 2957 int 2958 SSL_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func, 2959 CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func) 2960 { 2961 return (CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL, argl, argp, 2962 new_func, dup_func, free_func)); 2963 } 2964 2965 int 2966 SSL_set_ex_data(SSL *s, int idx, void *arg) 2967 { 2968 return (CRYPTO_set_ex_data(&s->internal->ex_data, idx, arg)); 2969 } 2970 2971 void * 2972 SSL_get_ex_data(const SSL *s, int idx) 2973 { 2974 return (CRYPTO_get_ex_data(&s->internal->ex_data, idx)); 2975 } 2976 2977 int 2978 SSL_CTX_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func, 2979 CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func) 2980 { 2981 return (CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL_CTX, argl, argp, 2982 new_func, dup_func, free_func)); 2983 } 2984 2985 int 2986 SSL_CTX_set_ex_data(SSL_CTX *s, int idx, void *arg) 2987 { 2988 return (CRYPTO_set_ex_data(&s->internal->ex_data, idx, arg)); 2989 } 2990 2991 void * 2992 SSL_CTX_get_ex_data(const SSL_CTX *s, int idx) 2993 { 2994 return (CRYPTO_get_ex_data(&s->internal->ex_data, idx)); 2995 } 2996 2997 int 2998 ssl_ok(SSL *s) 2999 { 3000 return (1); 3001 } 3002 3003 X509_STORE * 3004 SSL_CTX_get_cert_store(const SSL_CTX *ctx) 3005 { 3006 return (ctx->cert_store); 3007 } 3008 3009 void 3010 SSL_CTX_set_cert_store(SSL_CTX *ctx, X509_STORE *store) 3011 { 3012 if (ctx->cert_store != NULL) 3013 X509_STORE_free(ctx->cert_store); 3014 ctx->cert_store = store; 3015 } 3016 3017 int 3018 SSL_want(const SSL *s) 3019 { 3020 return (s->internal->rwstate); 3021 } 3022 3023 void 3024 SSL_CTX_set_tmp_rsa_callback(SSL_CTX *ctx, RSA *(*cb)(SSL *ssl, int is_export, 3025 int keylength)) 3026 { 3027 SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb); 3028 } 3029 3030 void 3031 SSL_set_tmp_rsa_callback(SSL *ssl, RSA *(*cb)(SSL *ssl, int is_export, 3032 int keylength)) 3033 { 3034 SSL_callback_ctrl(ssl, SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb); 3035 } 3036 3037 void 3038 SSL_CTX_set_tmp_dh_callback(SSL_CTX *ctx, DH *(*dh)(SSL *ssl, int is_export, 3039 int keylength)) 3040 { 3041 SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh); 3042 } 3043 3044 void 3045 SSL_set_tmp_dh_callback(SSL *ssl, DH *(*dh)(SSL *ssl, int is_export, 3046 int keylength)) 3047 { 3048 SSL_callback_ctrl(ssl, SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh); 3049 } 3050 3051 void 3052 SSL_CTX_set_tmp_ecdh_callback(SSL_CTX *ctx, EC_KEY *(*ecdh)(SSL *ssl, 3053 int is_export, int keylength)) 3054 { 3055 SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_TMP_ECDH_CB, 3056 (void (*)(void))ecdh); 3057 } 3058 3059 void 3060 SSL_set_tmp_ecdh_callback(SSL *ssl, EC_KEY *(*ecdh)(SSL *ssl, int is_export, 3061 int keylength)) 3062 { 3063 SSL_callback_ctrl(ssl, SSL_CTRL_SET_TMP_ECDH_CB,(void (*)(void))ecdh); 3064 } 3065 3066 3067 void 3068 SSL_CTX_set_msg_callback(SSL_CTX *ctx, void (*cb)(int write_p, int version, 3069 int content_type, const void *buf, size_t len, SSL *ssl, void *arg)) 3070 { 3071 SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_MSG_CALLBACK, 3072 (void (*)(void))cb); 3073 } 3074 3075 void 3076 SSL_set_msg_callback(SSL *ssl, void (*cb)(int write_p, int version, 3077 int content_type, const void *buf, size_t len, SSL *ssl, void *arg)) 3078 { 3079 SSL_callback_ctrl(ssl, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb); 3080 } 3081 3082 void 3083 ssl_clear_hash_ctx(EVP_MD_CTX **hash) 3084 { 3085 if (*hash) 3086 EVP_MD_CTX_destroy(*hash); 3087 *hash = NULL; 3088 } 3089 3090 void 3091 SSL_set_debug(SSL *s, int debug) 3092 { 3093 s->internal->debug = debug; 3094 } 3095 3096 int 3097 SSL_cache_hit(SSL *s) 3098 { 3099 return (s->internal->hit); 3100 } 3101 3102 3103 static int 3104 ssl_cipher_id_cmp_BSEARCH_CMP_FN(const void *a_, const void *b_) 3105 { 3106 SSL_CIPHER const *a = a_; 3107 SSL_CIPHER const *b = b_; 3108 return ssl_cipher_id_cmp(a, b); 3109 } 3110 3111 SSL_CIPHER * 3112 OBJ_bsearch_ssl_cipher_id(SSL_CIPHER *key, SSL_CIPHER const *base, int num) 3113 { 3114 return (SSL_CIPHER *)OBJ_bsearch_(key, base, num, sizeof(SSL_CIPHER), 3115 ssl_cipher_id_cmp_BSEARCH_CMP_FN); 3116 } 3117