1 /* $OpenBSD: ssl_lib.c,v 1.138 2017/01/23 10:22:06 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->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->ssl_free(s); 236 s->method = s->ctx->method; 237 if (!s->method->ssl_new(s)) 238 return (0); 239 } else 240 s->method->ssl_clear(s); 241 242 return (1); 243 } 244 245 /* Used to change an SSL_CTXs default SSL method type */ 246 int 247 SSL_CTX_set_ssl_version(SSL_CTX *ctx, const SSL_METHOD *meth) 248 { 249 STACK_OF(SSL_CIPHER) *sk; 250 251 ctx->method = meth; 252 253 sk = ssl_create_cipher_list(ctx->method, &(ctx->cipher_list), 254 &(ctx->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->options = ctx->options; 288 s->mode = ctx->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->ssl_new(s)) 358 goto err; 359 360 s->references = 1; 361 s->server = (ctx->method->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 if (s->cipher_list != NULL) 520 sk_SSL_CIPHER_free(s->cipher_list); 521 if (s->internal->cipher_list_by_id != NULL) 522 sk_SSL_CIPHER_free(s->internal->cipher_list_by_id); 523 524 /* Make the next call work :-) */ 525 if (s->session != NULL) { 526 ssl_clear_bad_session(s); 527 SSL_SESSION_free(s->session); 528 } 529 530 ssl_clear_cipher_ctx(s); 531 ssl_clear_hash_ctx(&s->read_hash); 532 ssl_clear_hash_ctx(&s->internal->write_hash); 533 534 if (s->cert != NULL) 535 ssl_cert_free(s->cert); 536 /* Free up if allocated */ 537 538 free(s->tlsext_hostname); 539 SSL_CTX_free(s->initial_ctx); 540 free(s->internal->tlsext_ecpointformatlist); 541 free(s->internal->tlsext_ellipticcurvelist); 542 if (s->internal->tlsext_ocsp_exts) 543 sk_X509_EXTENSION_pop_free(s->internal->tlsext_ocsp_exts, 544 X509_EXTENSION_free); 545 if (s->internal->tlsext_ocsp_ids) 546 sk_OCSP_RESPID_pop_free(s->internal->tlsext_ocsp_ids, OCSP_RESPID_free); 547 free(s->internal->tlsext_ocsp_resp); 548 549 if (s->internal->client_CA != NULL) 550 sk_X509_NAME_pop_free(s->internal->client_CA, X509_NAME_free); 551 552 if (s->method != NULL) 553 s->method->ssl_free(s); 554 555 SSL_CTX_free(s->ctx); 556 557 free(s->internal->next_proto_negotiated); 558 free(s->internal->alpn_client_proto_list); 559 560 #ifndef OPENSSL_NO_SRTP 561 if (s->internal->srtp_profiles) 562 sk_SRTP_PROTECTION_PROFILE_free(s->internal->srtp_profiles); 563 #endif 564 565 free(s->internal); 566 free(s); 567 } 568 569 void 570 SSL_set_bio(SSL *s, BIO *rbio, BIO *wbio) 571 { 572 /* If the output buffering BIO is still in place, remove it */ 573 if (s->bbio != NULL) { 574 if (s->wbio == s->bbio) { 575 s->wbio = s->wbio->next_bio; 576 s->bbio->next_bio = NULL; 577 } 578 } 579 580 if (s->rbio != rbio && s->rbio != s->wbio) 581 BIO_free_all(s->rbio); 582 if (s->wbio != wbio) 583 BIO_free_all(s->wbio); 584 s->rbio = rbio; 585 s->wbio = wbio; 586 } 587 588 BIO * 589 SSL_get_rbio(const SSL *s) 590 { 591 return (s->rbio); 592 } 593 594 BIO * 595 SSL_get_wbio(const SSL *s) 596 { 597 return (s->wbio); 598 } 599 600 int 601 SSL_get_fd(const SSL *s) 602 { 603 return (SSL_get_rfd(s)); 604 } 605 606 int 607 SSL_get_rfd(const SSL *s) 608 { 609 int ret = -1; 610 BIO *b, *r; 611 612 b = SSL_get_rbio(s); 613 r = BIO_find_type(b, BIO_TYPE_DESCRIPTOR); 614 if (r != NULL) 615 BIO_get_fd(r, &ret); 616 return (ret); 617 } 618 619 int 620 SSL_get_wfd(const SSL *s) 621 { 622 int ret = -1; 623 BIO *b, *r; 624 625 b = SSL_get_wbio(s); 626 r = BIO_find_type(b, BIO_TYPE_DESCRIPTOR); 627 if (r != NULL) 628 BIO_get_fd(r, &ret); 629 return (ret); 630 } 631 632 int 633 SSL_set_fd(SSL *s, int fd) 634 { 635 int ret = 0; 636 BIO *bio = NULL; 637 638 bio = BIO_new(BIO_s_socket()); 639 640 if (bio == NULL) { 641 SSLerr(SSL_F_SSL_SET_FD, ERR_R_BUF_LIB); 642 goto err; 643 } 644 BIO_set_fd(bio, fd, BIO_NOCLOSE); 645 SSL_set_bio(s, bio, bio); 646 ret = 1; 647 err: 648 return (ret); 649 } 650 651 int 652 SSL_set_wfd(SSL *s, int fd) 653 { 654 int ret = 0; 655 BIO *bio = NULL; 656 657 if ((s->rbio == NULL) || (BIO_method_type(s->rbio) != BIO_TYPE_SOCKET) 658 || ((int)BIO_get_fd(s->rbio, NULL) != fd)) { 659 bio = BIO_new(BIO_s_socket()); 660 661 if (bio == NULL) { 662 SSLerr(SSL_F_SSL_SET_WFD, ERR_R_BUF_LIB); 663 goto err; 664 } 665 BIO_set_fd(bio, fd, BIO_NOCLOSE); 666 SSL_set_bio(s, SSL_get_rbio(s), bio); 667 } else 668 SSL_set_bio(s, SSL_get_rbio(s), SSL_get_rbio(s)); 669 ret = 1; 670 err: 671 return (ret); 672 } 673 674 int 675 SSL_set_rfd(SSL *s, int fd) 676 { 677 int ret = 0; 678 BIO *bio = NULL; 679 680 if ((s->wbio == NULL) || (BIO_method_type(s->wbio) != BIO_TYPE_SOCKET) 681 || ((int)BIO_get_fd(s->wbio, NULL) != fd)) { 682 bio = BIO_new(BIO_s_socket()); 683 684 if (bio == NULL) { 685 SSLerr(SSL_F_SSL_SET_RFD, ERR_R_BUF_LIB); 686 goto err; 687 } 688 BIO_set_fd(bio, fd, BIO_NOCLOSE); 689 SSL_set_bio(s, bio, SSL_get_wbio(s)); 690 } else 691 SSL_set_bio(s, SSL_get_wbio(s), SSL_get_wbio(s)); 692 ret = 1; 693 err: 694 return (ret); 695 } 696 697 698 /* return length of latest Finished message we sent, copy to 'buf' */ 699 size_t 700 SSL_get_finished(const SSL *s, void *buf, size_t count) 701 { 702 size_t ret = 0; 703 704 if (s->s3 != NULL) { 705 ret = S3I(s)->tmp.finish_md_len; 706 if (count > ret) 707 count = ret; 708 memcpy(buf, S3I(s)->tmp.finish_md, count); 709 } 710 return (ret); 711 } 712 713 /* return length of latest Finished message we expected, copy to 'buf' */ 714 size_t 715 SSL_get_peer_finished(const SSL *s, void *buf, size_t count) 716 { 717 size_t ret = 0; 718 719 if (s->s3 != NULL) { 720 ret = S3I(s)->tmp.peer_finish_md_len; 721 if (count > ret) 722 count = ret; 723 memcpy(buf, S3I(s)->tmp.peer_finish_md, count); 724 } 725 return (ret); 726 } 727 728 729 int 730 SSL_get_verify_mode(const SSL *s) 731 { 732 return (s->verify_mode); 733 } 734 735 int 736 SSL_get_verify_depth(const SSL *s) 737 { 738 return (X509_VERIFY_PARAM_get_depth(s->param)); 739 } 740 741 int 742 (*SSL_get_verify_callback(const SSL *s))(int, X509_STORE_CTX *) 743 { 744 return (s->internal->verify_callback); 745 } 746 747 int 748 SSL_CTX_get_verify_mode(const SSL_CTX *ctx) 749 { 750 return (ctx->verify_mode); 751 } 752 753 int 754 SSL_CTX_get_verify_depth(const SSL_CTX *ctx) 755 { 756 return (X509_VERIFY_PARAM_get_depth(ctx->param)); 757 } 758 759 int (*SSL_CTX_get_verify_callback(const SSL_CTX *ctx))(int, X509_STORE_CTX *) 760 { 761 return (ctx->internal->default_verify_callback); 762 } 763 764 void 765 SSL_set_verify(SSL *s, int mode, 766 int (*callback)(int ok, X509_STORE_CTX *ctx)) 767 { 768 s->verify_mode = mode; 769 if (callback != NULL) 770 s->internal->verify_callback = callback; 771 } 772 773 void 774 SSL_set_verify_depth(SSL *s, int depth) 775 { 776 X509_VERIFY_PARAM_set_depth(s->param, depth); 777 } 778 779 void 780 SSL_set_read_ahead(SSL *s, int yes) 781 { 782 s->internal->read_ahead = yes; 783 } 784 785 int 786 SSL_get_read_ahead(const SSL *s) 787 { 788 return (s->internal->read_ahead); 789 } 790 791 int 792 SSL_pending(const SSL *s) 793 { 794 /* 795 * SSL_pending cannot work properly if read-ahead is enabled 796 * (SSL_[CTX_]ctrl(..., SSL_CTRL_SET_READ_AHEAD, 1, NULL)), 797 * and it is impossible to fix since SSL_pending cannot report 798 * errors that may be observed while scanning the new data. 799 * (Note that SSL_pending() is often used as a boolean value, 800 * so we'd better not return -1.) 801 */ 802 return (s->method->ssl_pending(s)); 803 } 804 805 X509 * 806 SSL_get_peer_certificate(const SSL *s) 807 { 808 X509 *r; 809 810 if ((s == NULL) || (s->session == NULL)) 811 r = NULL; 812 else 813 r = s->session->peer; 814 815 if (r == NULL) 816 return (r); 817 818 CRYPTO_add(&r->references, 1, CRYPTO_LOCK_X509); 819 820 return (r); 821 } 822 823 STACK_OF(X509) * 824 SSL_get_peer_cert_chain(const SSL *s) 825 { 826 STACK_OF(X509) *r; 827 828 if ((s == NULL) || (s->session == NULL) || 829 (SSI(s)->sess_cert == NULL)) 830 r = NULL; 831 else 832 r = SSI(s)->sess_cert->cert_chain; 833 834 /* 835 * If we are a client, cert_chain includes the peer's own 836 * certificate; 837 * if we are a server, it does not. 838 */ 839 return (r); 840 } 841 842 /* 843 * Now in theory, since the calling process own 't' it should be safe to 844 * modify. We need to be able to read f without being hassled 845 */ 846 void 847 SSL_copy_session_id(SSL *t, const SSL *f) 848 { 849 CERT *tmp; 850 851 /* Do we need to to SSL locking? */ 852 SSL_set_session(t, SSL_get_session(f)); 853 854 /* 855 * What if we are setup as SSLv2 but want to talk SSLv3 or 856 * vice-versa. 857 */ 858 if (t->method != f->method) { 859 t->method->ssl_free(t); /* cleanup current */ 860 t->method=f->method; /* change method */ 861 t->method->ssl_new(t); /* setup new */ 862 } 863 864 tmp = t->cert; 865 if (f->cert != NULL) { 866 CRYPTO_add(&f->cert->references, 1, CRYPTO_LOCK_SSL_CERT); 867 t->cert = f->cert; 868 } else 869 t->cert = NULL; 870 if (tmp != NULL) 871 ssl_cert_free(tmp); 872 SSL_set_session_id_context(t, f->sid_ctx, f->sid_ctx_length); 873 } 874 875 /* Fix this so it checks all the valid key/cert options */ 876 int 877 SSL_CTX_check_private_key(const SSL_CTX *ctx) 878 { 879 if ((ctx == NULL) || (ctx->internal->cert == NULL) || 880 (ctx->internal->cert->key->x509 == NULL)) { 881 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY, 882 SSL_R_NO_CERTIFICATE_ASSIGNED); 883 return (0); 884 } 885 if (ctx->internal->cert->key->privatekey == NULL) { 886 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY, 887 SSL_R_NO_PRIVATE_KEY_ASSIGNED); 888 return (0); 889 } 890 return (X509_check_private_key(ctx->internal->cert->key->x509, 891 ctx->internal->cert->key->privatekey)); 892 } 893 894 /* Fix this function so that it takes an optional type parameter */ 895 int 896 SSL_check_private_key(const SSL *ssl) 897 { 898 if (ssl == NULL) { 899 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY, 900 ERR_R_PASSED_NULL_PARAMETER); 901 return (0); 902 } 903 if (ssl->cert == NULL) { 904 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY, 905 SSL_R_NO_CERTIFICATE_ASSIGNED); 906 return (0); 907 } 908 if (ssl->cert->key->x509 == NULL) { 909 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY, 910 SSL_R_NO_CERTIFICATE_ASSIGNED); 911 return (0); 912 } 913 if (ssl->cert->key->privatekey == NULL) { 914 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY, 915 SSL_R_NO_PRIVATE_KEY_ASSIGNED); 916 return (0); 917 } 918 return (X509_check_private_key(ssl->cert->key->x509, 919 ssl->cert->key->privatekey)); 920 } 921 922 int 923 SSL_accept(SSL *s) 924 { 925 if (s->internal->handshake_func == NULL) 926 SSL_set_accept_state(s); /* Not properly initialized yet */ 927 928 return (s->method->ssl_accept(s)); 929 } 930 931 int 932 SSL_connect(SSL *s) 933 { 934 if (s->internal->handshake_func == NULL) 935 SSL_set_connect_state(s); /* Not properly initialized yet */ 936 937 return (s->method->ssl_connect(s)); 938 } 939 940 long 941 SSL_get_default_timeout(const SSL *s) 942 { 943 return (s->method->get_timeout()); 944 } 945 946 int 947 SSL_read(SSL *s, void *buf, int num) 948 { 949 if (s->internal->handshake_func == NULL) { 950 SSLerr(SSL_F_SSL_READ, SSL_R_UNINITIALIZED); 951 return (-1); 952 } 953 954 if (s->internal->shutdown & SSL_RECEIVED_SHUTDOWN) { 955 s->internal->rwstate = SSL_NOTHING; 956 return (0); 957 } 958 return (s->method->ssl_read(s, buf, num)); 959 } 960 961 int 962 SSL_peek(SSL *s, void *buf, int num) 963 { 964 if (s->internal->handshake_func == NULL) { 965 SSLerr(SSL_F_SSL_PEEK, SSL_R_UNINITIALIZED); 966 return (-1); 967 } 968 969 if (s->internal->shutdown & SSL_RECEIVED_SHUTDOWN) { 970 return (0); 971 } 972 return (s->method->ssl_peek(s, buf, num)); 973 } 974 975 int 976 SSL_write(SSL *s, const void *buf, int num) 977 { 978 if (s->internal->handshake_func == NULL) { 979 SSLerr(SSL_F_SSL_WRITE, SSL_R_UNINITIALIZED); 980 return (-1); 981 } 982 983 if (s->internal->shutdown & SSL_SENT_SHUTDOWN) { 984 s->internal->rwstate = SSL_NOTHING; 985 SSLerr(SSL_F_SSL_WRITE, SSL_R_PROTOCOL_IS_SHUTDOWN); 986 return (-1); 987 } 988 return (s->method->ssl_write(s, buf, num)); 989 } 990 991 int 992 SSL_shutdown(SSL *s) 993 { 994 /* 995 * Note that this function behaves differently from what one might 996 * expect. Return values are 0 for no success (yet), 997 * 1 for success; but calling it once is usually not enough, 998 * even if blocking I/O is used (see ssl3_shutdown). 999 */ 1000 1001 if (s->internal->handshake_func == NULL) { 1002 SSLerr(SSL_F_SSL_SHUTDOWN, SSL_R_UNINITIALIZED); 1003 return (-1); 1004 } 1005 1006 if ((s != NULL) && !SSL_in_init(s)) 1007 return (s->method->ssl_shutdown(s)); 1008 else 1009 return (1); 1010 } 1011 1012 int 1013 SSL_renegotiate(SSL *s) 1014 { 1015 if (s->internal->renegotiate == 0) 1016 s->internal->renegotiate = 1; 1017 1018 s->internal->new_session = 1; 1019 1020 return (s->method->ssl_renegotiate(s)); 1021 } 1022 1023 int 1024 SSL_renegotiate_abbreviated(SSL *s) 1025 { 1026 if (s->internal->renegotiate == 0) 1027 s->internal->renegotiate = 1; 1028 1029 s->internal->new_session = 0; 1030 1031 return (s->method->ssl_renegotiate(s)); 1032 } 1033 1034 int 1035 SSL_renegotiate_pending(SSL *s) 1036 { 1037 /* 1038 * Becomes true when negotiation is requested; 1039 * false again once a handshake has finished. 1040 */ 1041 return (s->internal->renegotiate != 0); 1042 } 1043 1044 long 1045 SSL_ctrl(SSL *s, int cmd, long larg, void *parg) 1046 { 1047 long l; 1048 1049 switch (cmd) { 1050 case SSL_CTRL_GET_READ_AHEAD: 1051 return (s->internal->read_ahead); 1052 case SSL_CTRL_SET_READ_AHEAD: 1053 l = s->internal->read_ahead; 1054 s->internal->read_ahead = larg; 1055 return (l); 1056 1057 case SSL_CTRL_SET_MSG_CALLBACK_ARG: 1058 s->internal->msg_callback_arg = parg; 1059 return (1); 1060 1061 case SSL_CTRL_OPTIONS: 1062 return (s->options|=larg); 1063 case SSL_CTRL_CLEAR_OPTIONS: 1064 return (s->options&=~larg); 1065 case SSL_CTRL_MODE: 1066 return (s->mode|=larg); 1067 case SSL_CTRL_CLEAR_MODE: 1068 return (s->mode &=~larg); 1069 case SSL_CTRL_GET_MAX_CERT_LIST: 1070 return (s->internal->max_cert_list); 1071 case SSL_CTRL_SET_MAX_CERT_LIST: 1072 l = s->internal->max_cert_list; 1073 s->internal->max_cert_list = larg; 1074 return (l); 1075 case SSL_CTRL_SET_MTU: 1076 #ifndef OPENSSL_NO_DTLS1 1077 if (larg < (long)dtls1_min_mtu()) 1078 return (0); 1079 #endif 1080 if (SSL_IS_DTLS(s)) { 1081 D1I(s)->mtu = larg; 1082 return (larg); 1083 } 1084 return (0); 1085 case SSL_CTRL_SET_MAX_SEND_FRAGMENT: 1086 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH) 1087 return (0); 1088 s->max_send_fragment = larg; 1089 return (1); 1090 case SSL_CTRL_GET_RI_SUPPORT: 1091 if (s->s3) 1092 return (S3I(s)->send_connection_binding); 1093 else return (0); 1094 default: 1095 if (SSL_IS_DTLS(s)) 1096 return dtls1_ctrl(s, cmd, larg, parg); 1097 return ssl3_ctrl(s, cmd, larg, parg); 1098 } 1099 } 1100 1101 long 1102 SSL_callback_ctrl(SSL *s, int cmd, void (*fp)(void)) 1103 { 1104 switch (cmd) { 1105 case SSL_CTRL_SET_MSG_CALLBACK: 1106 s->internal->msg_callback = (void (*)(int write_p, int version, 1107 int content_type, const void *buf, size_t len, 1108 SSL *ssl, void *arg))(fp); 1109 return (1); 1110 1111 default: 1112 return (ssl3_callback_ctrl(s, cmd, fp)); 1113 } 1114 } 1115 1116 struct lhash_st_SSL_SESSION * 1117 SSL_CTX_sessions(SSL_CTX *ctx) 1118 { 1119 return (ctx->internal->sessions); 1120 } 1121 1122 long 1123 SSL_CTX_ctrl(SSL_CTX *ctx, int cmd, long larg, void *parg) 1124 { 1125 long l; 1126 1127 switch (cmd) { 1128 case SSL_CTRL_GET_READ_AHEAD: 1129 return (ctx->internal->read_ahead); 1130 case SSL_CTRL_SET_READ_AHEAD: 1131 l = ctx->internal->read_ahead; 1132 ctx->internal->read_ahead = larg; 1133 return (l); 1134 1135 case SSL_CTRL_SET_MSG_CALLBACK_ARG: 1136 ctx->internal->msg_callback_arg = parg; 1137 return (1); 1138 1139 case SSL_CTRL_GET_MAX_CERT_LIST: 1140 return (ctx->internal->max_cert_list); 1141 case SSL_CTRL_SET_MAX_CERT_LIST: 1142 l = ctx->internal->max_cert_list; 1143 ctx->internal->max_cert_list = larg; 1144 return (l); 1145 1146 case SSL_CTRL_SET_SESS_CACHE_SIZE: 1147 l = ctx->internal->session_cache_size; 1148 ctx->internal->session_cache_size = larg; 1149 return (l); 1150 case SSL_CTRL_GET_SESS_CACHE_SIZE: 1151 return (ctx->internal->session_cache_size); 1152 case SSL_CTRL_SET_SESS_CACHE_MODE: 1153 l = ctx->internal->session_cache_mode; 1154 ctx->internal->session_cache_mode = larg; 1155 return (l); 1156 case SSL_CTRL_GET_SESS_CACHE_MODE: 1157 return (ctx->internal->session_cache_mode); 1158 1159 case SSL_CTRL_SESS_NUMBER: 1160 return (lh_SSL_SESSION_num_items(ctx->internal->sessions)); 1161 case SSL_CTRL_SESS_CONNECT: 1162 return (ctx->internal->stats.sess_connect); 1163 case SSL_CTRL_SESS_CONNECT_GOOD: 1164 return (ctx->internal->stats.sess_connect_good); 1165 case SSL_CTRL_SESS_CONNECT_RENEGOTIATE: 1166 return (ctx->internal->stats.sess_connect_renegotiate); 1167 case SSL_CTRL_SESS_ACCEPT: 1168 return (ctx->internal->stats.sess_accept); 1169 case SSL_CTRL_SESS_ACCEPT_GOOD: 1170 return (ctx->internal->stats.sess_accept_good); 1171 case SSL_CTRL_SESS_ACCEPT_RENEGOTIATE: 1172 return (ctx->internal->stats.sess_accept_renegotiate); 1173 case SSL_CTRL_SESS_HIT: 1174 return (ctx->internal->stats.sess_hit); 1175 case SSL_CTRL_SESS_CB_HIT: 1176 return (ctx->internal->stats.sess_cb_hit); 1177 case SSL_CTRL_SESS_MISSES: 1178 return (ctx->internal->stats.sess_miss); 1179 case SSL_CTRL_SESS_TIMEOUTS: 1180 return (ctx->internal->stats.sess_timeout); 1181 case SSL_CTRL_SESS_CACHE_FULL: 1182 return (ctx->internal->stats.sess_cache_full); 1183 case SSL_CTRL_OPTIONS: 1184 return (ctx->options|=larg); 1185 case SSL_CTRL_CLEAR_OPTIONS: 1186 return (ctx->options&=~larg); 1187 case SSL_CTRL_MODE: 1188 return (ctx->mode|=larg); 1189 case SSL_CTRL_CLEAR_MODE: 1190 return (ctx->mode&=~larg); 1191 case SSL_CTRL_SET_MAX_SEND_FRAGMENT: 1192 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH) 1193 return (0); 1194 ctx->internal->max_send_fragment = larg; 1195 return (1); 1196 default: 1197 return (ssl3_ctx_ctrl(ctx, cmd, larg, parg)); 1198 } 1199 } 1200 1201 long 1202 SSL_CTX_callback_ctrl(SSL_CTX *ctx, int cmd, void (*fp)(void)) 1203 { 1204 switch (cmd) { 1205 case SSL_CTRL_SET_MSG_CALLBACK: 1206 ctx->internal->msg_callback = (void (*)(int write_p, int version, 1207 int content_type, const void *buf, size_t len, SSL *ssl, 1208 void *arg))(fp); 1209 return (1); 1210 1211 default: 1212 return (ssl3_ctx_callback_ctrl(ctx, cmd, fp)); 1213 } 1214 } 1215 1216 int 1217 ssl_cipher_id_cmp(const SSL_CIPHER *a, const SSL_CIPHER *b) 1218 { 1219 long l; 1220 1221 l = a->id - b->id; 1222 if (l == 0L) 1223 return (0); 1224 else 1225 return ((l > 0) ? 1:-1); 1226 } 1227 1228 int 1229 ssl_cipher_ptr_id_cmp(const SSL_CIPHER * const *ap, 1230 const SSL_CIPHER * const *bp) 1231 { 1232 long l; 1233 1234 l = (*ap)->id - (*bp)->id; 1235 if (l == 0L) 1236 return (0); 1237 else 1238 return ((l > 0) ? 1:-1); 1239 } 1240 1241 /* 1242 * Return a STACK of the ciphers available for the SSL and in order of 1243 * preference. 1244 */ 1245 STACK_OF(SSL_CIPHER) * 1246 SSL_get_ciphers(const SSL *s) 1247 { 1248 if (s != NULL) { 1249 if (s->cipher_list != NULL) { 1250 return (s->cipher_list); 1251 } else if ((s->ctx != NULL) && (s->ctx->cipher_list != NULL)) { 1252 return (s->ctx->cipher_list); 1253 } 1254 } 1255 return (NULL); 1256 } 1257 1258 /* 1259 * Return a STACK of the ciphers available for the SSL and in order of 1260 * algorithm id. 1261 */ 1262 STACK_OF(SSL_CIPHER) * 1263 ssl_get_ciphers_by_id(SSL *s) 1264 { 1265 if (s != NULL) { 1266 if (s->internal->cipher_list_by_id != NULL) { 1267 return (s->internal->cipher_list_by_id); 1268 } else if ((s->ctx != NULL) && 1269 (s->ctx->internal->cipher_list_by_id != NULL)) { 1270 return (s->ctx->internal->cipher_list_by_id); 1271 } 1272 } 1273 return (NULL); 1274 } 1275 1276 /* The old interface to get the same thing as SSL_get_ciphers(). */ 1277 const char * 1278 SSL_get_cipher_list(const SSL *s, int n) 1279 { 1280 SSL_CIPHER *c; 1281 STACK_OF(SSL_CIPHER) *sk; 1282 1283 if (s == NULL) 1284 return (NULL); 1285 sk = SSL_get_ciphers(s); 1286 if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= n)) 1287 return (NULL); 1288 c = sk_SSL_CIPHER_value(sk, n); 1289 if (c == NULL) 1290 return (NULL); 1291 return (c->name); 1292 } 1293 1294 /* Specify the ciphers to be used by default by the SSL_CTX. */ 1295 int 1296 SSL_CTX_set_cipher_list(SSL_CTX *ctx, const char *str) 1297 { 1298 STACK_OF(SSL_CIPHER) *sk; 1299 1300 sk = ssl_create_cipher_list(ctx->method, &ctx->cipher_list, 1301 &ctx->internal->cipher_list_by_id, str); 1302 /* 1303 * ssl_create_cipher_list may return an empty stack if it 1304 * was unable to find a cipher matching the given rule string 1305 * (for example if the rule string specifies a cipher which 1306 * has been disabled). This is not an error as far as 1307 * ssl_create_cipher_list is concerned, and hence 1308 * ctx->cipher_list and ctx->internal->cipher_list_by_id has been 1309 * updated. 1310 */ 1311 if (sk == NULL) 1312 return (0); 1313 else if (sk_SSL_CIPHER_num(sk) == 0) { 1314 SSLerr(SSL_F_SSL_CTX_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH); 1315 return (0); 1316 } 1317 return (1); 1318 } 1319 1320 /* Specify the ciphers to be used by the SSL. */ 1321 int 1322 SSL_set_cipher_list(SSL *s, const char *str) 1323 { 1324 STACK_OF(SSL_CIPHER) *sk; 1325 1326 sk = ssl_create_cipher_list(s->ctx->method, &s->cipher_list, 1327 &s->internal->cipher_list_by_id, str); 1328 /* see comment in SSL_CTX_set_cipher_list */ 1329 if (sk == NULL) 1330 return (0); 1331 else if (sk_SSL_CIPHER_num(sk) == 0) { 1332 SSLerr(SSL_F_SSL_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH); 1333 return (0); 1334 } 1335 return (1); 1336 } 1337 1338 /* works well for SSLv2, not so good for SSLv3 */ 1339 char * 1340 SSL_get_shared_ciphers(const SSL *s, char *buf, int len) 1341 { 1342 char *end; 1343 STACK_OF(SSL_CIPHER) *sk; 1344 SSL_CIPHER *c; 1345 size_t curlen = 0; 1346 int i; 1347 1348 if (s->session == NULL || s->session->ciphers == NULL || len < 2) 1349 return (NULL); 1350 1351 sk = s->session->ciphers; 1352 if (sk_SSL_CIPHER_num(sk) == 0) 1353 return (NULL); 1354 1355 buf[0] = '\0'; 1356 for (i = 0; i < sk_SSL_CIPHER_num(sk); i++) { 1357 c = sk_SSL_CIPHER_value(sk, i); 1358 end = buf + curlen; 1359 if (strlcat(buf, c->name, len) >= len || 1360 (curlen = strlcat(buf, ":", len)) >= len) { 1361 /* remove truncated cipher from list */ 1362 *end = '\0'; 1363 break; 1364 } 1365 } 1366 /* remove trailing colon */ 1367 if ((end = strrchr(buf, ':')) != NULL) 1368 *end = '\0'; 1369 return (buf); 1370 } 1371 1372 int 1373 ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk, unsigned char *p, 1374 size_t maxlen, size_t *outlen) 1375 { 1376 SSL_CIPHER *cipher; 1377 int ciphers = 0; 1378 CBB cbb; 1379 int i; 1380 1381 *outlen = 0; 1382 1383 if (sk == NULL) 1384 return (0); 1385 1386 if (!CBB_init_fixed(&cbb, p, maxlen)) 1387 goto err; 1388 1389 for (i = 0; i < sk_SSL_CIPHER_num(sk); i++) { 1390 cipher = sk_SSL_CIPHER_value(sk, i); 1391 1392 /* Skip TLS v1.2 only ciphersuites if lower than v1.2 */ 1393 if ((cipher->algorithm_ssl & SSL_TLSV1_2) && 1394 (TLS1_get_client_version(s) < TLS1_2_VERSION)) 1395 continue; 1396 1397 if (!CBB_add_u16(&cbb, ssl3_cipher_get_value(cipher))) 1398 goto err; 1399 1400 ciphers++; 1401 } 1402 1403 /* Add SCSV if there are other ciphers and we're not renegotiating. */ 1404 if (ciphers > 0 && !s->internal->renegotiate) { 1405 if (!CBB_add_u16(&cbb, SSL3_CK_SCSV & SSL3_CK_VALUE_MASK)) 1406 goto err; 1407 } 1408 1409 if (!CBB_finish(&cbb, NULL, outlen)) 1410 goto err; 1411 1412 return 1; 1413 1414 err: 1415 CBB_cleanup(&cbb); 1416 1417 return 0; 1418 } 1419 1420 STACK_OF(SSL_CIPHER) * 1421 ssl_bytes_to_cipher_list(SSL *s, const unsigned char *p, int num) 1422 { 1423 CBS cbs; 1424 const SSL_CIPHER *c; 1425 STACK_OF(SSL_CIPHER) *sk = NULL; 1426 unsigned long cipher_id; 1427 uint16_t cipher_value, max_version; 1428 1429 if (s->s3) 1430 S3I(s)->send_connection_binding = 0; 1431 1432 /* 1433 * RFC 5246 section 7.4.1.2 defines the interval as [2,2^16-2]. 1434 */ 1435 if (num < 2 || num > 0x10000 - 2) { 1436 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST, 1437 SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST); 1438 return (NULL); 1439 } 1440 1441 if ((sk = sk_SSL_CIPHER_new_null()) == NULL) { 1442 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST, ERR_R_MALLOC_FAILURE); 1443 goto err; 1444 } 1445 1446 CBS_init(&cbs, p, num); 1447 while (CBS_len(&cbs) > 0) { 1448 if (!CBS_get_u16(&cbs, &cipher_value)) { 1449 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST, 1450 SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST); 1451 goto err; 1452 } 1453 1454 cipher_id = SSL3_CK_ID | cipher_value; 1455 1456 if (s->s3 != NULL && cipher_id == SSL3_CK_SCSV) { 1457 /* 1458 * TLS_EMPTY_RENEGOTIATION_INFO_SCSV is fatal if 1459 * renegotiating. 1460 */ 1461 if (s->internal->renegotiate) { 1462 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST, 1463 SSL_R_SCSV_RECEIVED_WHEN_RENEGOTIATING); 1464 ssl3_send_alert(s, SSL3_AL_FATAL, 1465 SSL_AD_HANDSHAKE_FAILURE); 1466 1467 goto err; 1468 } 1469 S3I(s)->send_connection_binding = 1; 1470 continue; 1471 } 1472 1473 if (cipher_id == SSL3_CK_FALLBACK_SCSV) { 1474 /* 1475 * TLS_FALLBACK_SCSV indicates that the client 1476 * previously tried a higher protocol version. 1477 * Fail if the current version is an unexpected 1478 * downgrade. 1479 */ 1480 max_version = ssl_max_server_version(s); 1481 if (max_version == 0 || s->version < max_version) { 1482 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST, 1483 SSL_R_INAPPROPRIATE_FALLBACK); 1484 if (s->s3 != NULL) 1485 ssl3_send_alert(s, SSL3_AL_FATAL, 1486 SSL_AD_INAPPROPRIATE_FALLBACK); 1487 goto err; 1488 } 1489 continue; 1490 } 1491 1492 if ((c = ssl3_get_cipher_by_value(cipher_value)) != NULL) { 1493 if (!sk_SSL_CIPHER_push(sk, c)) { 1494 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST, 1495 ERR_R_MALLOC_FAILURE); 1496 goto err; 1497 } 1498 } 1499 } 1500 1501 return (sk); 1502 1503 err: 1504 sk_SSL_CIPHER_free(sk); 1505 1506 return (NULL); 1507 } 1508 1509 1510 /* 1511 * Return a servername extension value if provided in Client Hello, or NULL. 1512 * So far, only host_name types are defined (RFC 3546). 1513 */ 1514 const char * 1515 SSL_get_servername(const SSL *s, const int type) 1516 { 1517 if (type != TLSEXT_NAMETYPE_host_name) 1518 return (NULL); 1519 1520 return (s->session && !s->tlsext_hostname ? 1521 s->session->tlsext_hostname : 1522 s->tlsext_hostname); 1523 } 1524 1525 int 1526 SSL_get_servername_type(const SSL *s) 1527 { 1528 if (s->session && 1529 (!s->tlsext_hostname ? 1530 s->session->tlsext_hostname : s->tlsext_hostname)) 1531 return (TLSEXT_NAMETYPE_host_name); 1532 return (-1); 1533 } 1534 1535 /* 1536 * SSL_select_next_proto implements the standard protocol selection. It is 1537 * expected that this function is called from the callback set by 1538 * SSL_CTX_set_next_proto_select_cb. 1539 * 1540 * The protocol data is assumed to be a vector of 8-bit, length prefixed byte 1541 * strings. The length byte itself is not included in the length. A byte 1542 * string of length 0 is invalid. No byte string may be truncated. 1543 * 1544 * The current, but experimental algorithm for selecting the protocol is: 1545 * 1546 * 1) If the server doesn't support NPN then this is indicated to the 1547 * callback. In this case, the client application has to abort the connection 1548 * or have a default application level protocol. 1549 * 1550 * 2) If the server supports NPN, but advertises an empty list then the 1551 * client selects the first protcol in its list, but indicates via the 1552 * API that this fallback case was enacted. 1553 * 1554 * 3) Otherwise, the client finds the first protocol in the server's list 1555 * that it supports and selects this protocol. This is because it's 1556 * assumed that the server has better information about which protocol 1557 * a client should use. 1558 * 1559 * 4) If the client doesn't support any of the server's advertised 1560 * protocols, then this is treated the same as case 2. 1561 * 1562 * It returns either 1563 * OPENSSL_NPN_NEGOTIATED if a common protocol was found, or 1564 * OPENSSL_NPN_NO_OVERLAP if the fallback case was reached. 1565 */ 1566 int 1567 SSL_select_next_proto(unsigned char **out, unsigned char *outlen, 1568 const unsigned char *server, unsigned int server_len, 1569 const unsigned char *client, unsigned int client_len) 1570 { 1571 unsigned int i, j; 1572 const unsigned char *result; 1573 int status = OPENSSL_NPN_UNSUPPORTED; 1574 1575 /* 1576 * For each protocol in server preference order, 1577 * see if we support it. 1578 */ 1579 for (i = 0; i < server_len; ) { 1580 for (j = 0; j < client_len; ) { 1581 if (server[i] == client[j] && 1582 memcmp(&server[i + 1], 1583 &client[j + 1], server[i]) == 0) { 1584 /* We found a match */ 1585 result = &server[i]; 1586 status = OPENSSL_NPN_NEGOTIATED; 1587 goto found; 1588 } 1589 j += client[j]; 1590 j++; 1591 } 1592 i += server[i]; 1593 i++; 1594 } 1595 1596 /* There's no overlap between our protocols and the server's list. */ 1597 result = client; 1598 status = OPENSSL_NPN_NO_OVERLAP; 1599 1600 found: 1601 *out = (unsigned char *) result + 1; 1602 *outlen = result[0]; 1603 return (status); 1604 } 1605 1606 /* 1607 * SSL_get0_next_proto_negotiated sets *data and *len to point to the client's 1608 * requested protocol for this connection and returns 0. If the client didn't 1609 * request any protocol, then *data is set to NULL. 1610 * 1611 * Note that the client can request any protocol it chooses. The value returned 1612 * from this function need not be a member of the list of supported protocols 1613 * provided by the callback. 1614 */ 1615 void 1616 SSL_get0_next_proto_negotiated(const SSL *s, const unsigned char **data, 1617 unsigned *len) 1618 { 1619 *data = s->internal->next_proto_negotiated; 1620 if (!*data) { 1621 *len = 0; 1622 } else { 1623 *len = s->internal->next_proto_negotiated_len; 1624 } 1625 } 1626 1627 /* 1628 * SSL_CTX_set_next_protos_advertised_cb sets a callback that is called when a 1629 * TLS server needs a list of supported protocols for Next Protocol 1630 * Negotiation. The returned list must be in wire format. The list is returned 1631 * by setting |out| to point to it and |outlen| to its length. This memory will 1632 * not be modified, but one should assume that the SSL* keeps a reference to 1633 * it. 1634 * 1635 * The callback should return SSL_TLSEXT_ERR_OK if it wishes to advertise. 1636 * Otherwise, no such extension will be included in the ServerHello. 1637 */ 1638 void 1639 SSL_CTX_set_next_protos_advertised_cb(SSL_CTX *ctx, int (*cb) (SSL *ssl, 1640 const unsigned char **out, unsigned int *outlen, void *arg), void *arg) 1641 { 1642 ctx->internal->next_protos_advertised_cb = cb; 1643 ctx->internal->next_protos_advertised_cb_arg = arg; 1644 } 1645 1646 /* 1647 * SSL_CTX_set_next_proto_select_cb sets a callback that is called when a 1648 * client needs to select a protocol from the server's provided list. |out| 1649 * must be set to point to the selected protocol (which may be within |in|). 1650 * The length of the protocol name must be written into |outlen|. The server's 1651 * advertised protocols are provided in |in| and |inlen|. The callback can 1652 * assume that |in| is syntactically valid. 1653 * 1654 * The client must select a protocol. It is fatal to the connection if this 1655 * callback returns a value other than SSL_TLSEXT_ERR_OK. 1656 */ 1657 void 1658 SSL_CTX_set_next_proto_select_cb(SSL_CTX *ctx, int (*cb) (SSL *s, 1659 unsigned char **out, unsigned char *outlen, const unsigned char *in, 1660 unsigned int inlen, void *arg), void *arg) 1661 { 1662 ctx->internal->next_proto_select_cb = cb; 1663 ctx->internal->next_proto_select_cb_arg = arg; 1664 } 1665 1666 /* 1667 * SSL_CTX_set_alpn_protos sets the ALPN protocol list to the specified 1668 * protocols, which must be in wire-format (i.e. a series of non-empty, 1669 * 8-bit length-prefixed strings). Returns 0 on success. 1670 */ 1671 int 1672 SSL_CTX_set_alpn_protos(SSL_CTX *ctx, const unsigned char *protos, 1673 unsigned int protos_len) 1674 { 1675 free(ctx->internal->alpn_client_proto_list); 1676 if ((ctx->internal->alpn_client_proto_list = malloc(protos_len)) == NULL) 1677 return (1); 1678 memcpy(ctx->internal->alpn_client_proto_list, protos, protos_len); 1679 ctx->internal->alpn_client_proto_list_len = protos_len; 1680 1681 return (0); 1682 } 1683 1684 /* 1685 * SSL_set_alpn_protos sets the ALPN protocol list to the specified 1686 * protocols, which must be in wire-format (i.e. a series of non-empty, 1687 * 8-bit length-prefixed strings). Returns 0 on success. 1688 */ 1689 int 1690 SSL_set_alpn_protos(SSL *ssl, const unsigned char* protos, 1691 unsigned int protos_len) 1692 { 1693 free(ssl->internal->alpn_client_proto_list); 1694 if ((ssl->internal->alpn_client_proto_list = malloc(protos_len)) == NULL) 1695 return (1); 1696 memcpy(ssl->internal->alpn_client_proto_list, protos, protos_len); 1697 ssl->internal->alpn_client_proto_list_len = protos_len; 1698 1699 return (0); 1700 } 1701 1702 /* 1703 * SSL_CTX_set_alpn_select_cb sets a callback function that is called during 1704 * ClientHello processing in order to select an ALPN protocol from the 1705 * client's list of offered protocols. 1706 */ 1707 void 1708 SSL_CTX_set_alpn_select_cb(SSL_CTX* ctx, 1709 int (*cb) (SSL *ssl, const unsigned char **out, unsigned char *outlen, 1710 const unsigned char *in, unsigned int inlen, void *arg), void *arg) 1711 { 1712 ctx->internal->alpn_select_cb = cb; 1713 ctx->internal->alpn_select_cb_arg = arg; 1714 } 1715 1716 /* 1717 * SSL_get0_alpn_selected gets the selected ALPN protocol (if any). On return 1718 * it sets data to point to len bytes of protocol name (not including the 1719 * leading length-prefix byte). If the server didn't respond with* a negotiated 1720 * protocol then len will be zero. 1721 */ 1722 void 1723 SSL_get0_alpn_selected(const SSL *ssl, const unsigned char **data, 1724 unsigned *len) 1725 { 1726 *data = NULL; 1727 *len = 0; 1728 1729 if (ssl->s3 != NULL) { 1730 *data = ssl->s3->internal->alpn_selected; 1731 *len = ssl->s3->internal->alpn_selected_len; 1732 } 1733 } 1734 1735 int 1736 SSL_export_keying_material(SSL *s, unsigned char *out, size_t olen, 1737 const char *label, size_t llen, const unsigned char *p, size_t plen, 1738 int use_context) 1739 { 1740 return (s->method->ssl3_enc->export_keying_material(s, out, olen, 1741 label, llen, p, plen, use_context)); 1742 } 1743 1744 static unsigned long 1745 ssl_session_hash(const SSL_SESSION *a) 1746 { 1747 unsigned long l; 1748 1749 l = (unsigned long) 1750 ((unsigned int) a->session_id[0] )| 1751 ((unsigned int) a->session_id[1]<< 8L)| 1752 ((unsigned long)a->session_id[2]<<16L)| 1753 ((unsigned long)a->session_id[3]<<24L); 1754 return (l); 1755 } 1756 1757 /* 1758 * NB: If this function (or indeed the hash function which uses a sort of 1759 * coarser function than this one) is changed, ensure 1760 * SSL_CTX_has_matching_session_id() is checked accordingly. It relies on being 1761 * able to construct an SSL_SESSION that will collide with any existing session 1762 * with a matching session ID. 1763 */ 1764 static int 1765 ssl_session_cmp(const SSL_SESSION *a, const SSL_SESSION *b) 1766 { 1767 if (a->ssl_version != b->ssl_version) 1768 return (1); 1769 if (a->session_id_length != b->session_id_length) 1770 return (1); 1771 if (timingsafe_memcmp(a->session_id, b->session_id, a->session_id_length) != 0) 1772 return (1); 1773 return (0); 1774 } 1775 1776 /* 1777 * These wrapper functions should remain rather than redeclaring 1778 * SSL_SESSION_hash and SSL_SESSION_cmp for void* types and casting each 1779 * variable. The reason is that the functions aren't static, they're exposed via 1780 * ssl.h. 1781 */ 1782 static unsigned long 1783 ssl_session_LHASH_HASH(const void *arg) 1784 { 1785 const SSL_SESSION *a = arg; 1786 1787 return ssl_session_hash(a); 1788 } 1789 1790 static int 1791 ssl_session_LHASH_COMP(const void *arg1, const void *arg2) 1792 { 1793 const SSL_SESSION *a = arg1; 1794 const SSL_SESSION *b = arg2; 1795 1796 return ssl_session_cmp(a, b); 1797 } 1798 1799 SSL_CTX * 1800 SSL_CTX_new(const SSL_METHOD *meth) 1801 { 1802 SSL_CTX *ret; 1803 1804 if (meth == NULL) { 1805 SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_NULL_SSL_METHOD_PASSED); 1806 return (NULL); 1807 } 1808 1809 if ((ret = calloc(1, sizeof(*ret))) == NULL) { 1810 SSLerr(SSL_F_SSL_CTX_NEW, ERR_R_MALLOC_FAILURE); 1811 return (NULL); 1812 } 1813 if ((ret->internal = calloc(1, sizeof(*ret->internal))) == NULL) { 1814 free(ret); 1815 SSLerr(SSL_F_SSL_CTX_NEW, ERR_R_MALLOC_FAILURE); 1816 return (NULL); 1817 } 1818 1819 if (SSL_get_ex_data_X509_STORE_CTX_idx() < 0) { 1820 SSLerr(SSL_F_SSL_CTX_NEW, 1821 SSL_R_X509_VERIFICATION_SETUP_PROBLEMS); 1822 goto err; 1823 } 1824 1825 ret->method = meth; 1826 1827 ret->cert_store = NULL; 1828 ret->internal->session_cache_mode = SSL_SESS_CACHE_SERVER; 1829 ret->internal->session_cache_size = SSL_SESSION_CACHE_MAX_SIZE_DEFAULT; 1830 ret->internal->session_cache_head = NULL; 1831 ret->internal->session_cache_tail = NULL; 1832 1833 /* We take the system default */ 1834 ret->session_timeout = meth->get_timeout(); 1835 1836 ret->internal->new_session_cb = 0; 1837 ret->internal->remove_session_cb = 0; 1838 ret->internal->get_session_cb = 0; 1839 ret->internal->generate_session_id = 0; 1840 1841 memset((char *)&ret->internal->stats, 0, sizeof(ret->internal->stats)); 1842 1843 ret->references = 1; 1844 ret->internal->quiet_shutdown = 0; 1845 1846 ret->internal->info_callback = NULL; 1847 1848 ret->internal->app_verify_callback = 0; 1849 ret->internal->app_verify_arg = NULL; 1850 1851 ret->internal->max_cert_list = SSL_MAX_CERT_LIST_DEFAULT; 1852 ret->internal->read_ahead = 0; 1853 ret->internal->msg_callback = 0; 1854 ret->internal->msg_callback_arg = NULL; 1855 ret->verify_mode = SSL_VERIFY_NONE; 1856 ret->sid_ctx_length = 0; 1857 ret->internal->default_verify_callback = NULL; 1858 if ((ret->internal->cert = ssl_cert_new()) == NULL) 1859 goto err; 1860 1861 ret->internal->default_passwd_callback = 0; 1862 ret->internal->default_passwd_callback_userdata = NULL; 1863 ret->internal->client_cert_cb = 0; 1864 ret->internal->app_gen_cookie_cb = 0; 1865 ret->internal->app_verify_cookie_cb = 0; 1866 1867 ret->internal->sessions = lh_SSL_SESSION_new(); 1868 if (ret->internal->sessions == NULL) 1869 goto err; 1870 ret->cert_store = X509_STORE_new(); 1871 if (ret->cert_store == NULL) 1872 goto err; 1873 1874 ssl_create_cipher_list(ret->method, &ret->cipher_list, 1875 &ret->internal->cipher_list_by_id, SSL_DEFAULT_CIPHER_LIST); 1876 if (ret->cipher_list == NULL || 1877 sk_SSL_CIPHER_num(ret->cipher_list) <= 0) { 1878 SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_LIBRARY_HAS_NO_CIPHERS); 1879 goto err2; 1880 } 1881 1882 ret->param = X509_VERIFY_PARAM_new(); 1883 if (!ret->param) 1884 goto err; 1885 1886 if ((ret->internal->md5 = EVP_get_digestbyname("ssl3-md5")) == NULL) { 1887 SSLerr(SSL_F_SSL_CTX_NEW, 1888 SSL_R_UNABLE_TO_LOAD_SSL3_MD5_ROUTINES); 1889 goto err2; 1890 } 1891 if ((ret->internal->sha1 = EVP_get_digestbyname("ssl3-sha1")) == NULL) { 1892 SSLerr(SSL_F_SSL_CTX_NEW, 1893 SSL_R_UNABLE_TO_LOAD_SSL3_SHA1_ROUTINES); 1894 goto err2; 1895 } 1896 1897 if ((ret->internal->client_CA = sk_X509_NAME_new_null()) == NULL) 1898 goto err; 1899 1900 CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_CTX, ret, &ret->internal->ex_data); 1901 1902 ret->extra_certs = NULL; 1903 1904 ret->internal->max_send_fragment = SSL3_RT_MAX_PLAIN_LENGTH; 1905 1906 ret->internal->tlsext_servername_callback = 0; 1907 ret->internal->tlsext_servername_arg = NULL; 1908 1909 /* Setup RFC4507 ticket keys */ 1910 arc4random_buf(ret->internal->tlsext_tick_key_name, 16); 1911 arc4random_buf(ret->internal->tlsext_tick_hmac_key, 16); 1912 arc4random_buf(ret->internal->tlsext_tick_aes_key, 16); 1913 1914 ret->internal->tlsext_status_cb = 0; 1915 ret->internal->tlsext_status_arg = NULL; 1916 1917 ret->internal->next_protos_advertised_cb = 0; 1918 ret->internal->next_proto_select_cb = 0; 1919 1920 #ifndef OPENSSL_NO_ENGINE 1921 ret->internal->client_cert_engine = NULL; 1922 #ifdef OPENSSL_SSL_CLIENT_ENGINE_AUTO 1923 #define eng_strx(x) #x 1924 #define eng_str(x) eng_strx(x) 1925 /* Use specific client engine automatically... ignore errors */ 1926 { 1927 ENGINE *eng; 1928 eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO)); 1929 if (!eng) { 1930 ERR_clear_error(); 1931 ENGINE_load_builtin_engines(); 1932 eng = ENGINE_by_id(eng_str( 1933 OPENSSL_SSL_CLIENT_ENGINE_AUTO)); 1934 } 1935 if (!eng || !SSL_CTX_set_client_cert_engine(ret, eng)) 1936 ERR_clear_error(); 1937 } 1938 #endif 1939 #endif 1940 /* 1941 * Default is to connect to non-RI servers. When RI is more widely 1942 * deployed might change this. 1943 */ 1944 ret->options |= SSL_OP_LEGACY_SERVER_CONNECT; 1945 1946 return (ret); 1947 err: 1948 SSLerr(SSL_F_SSL_CTX_NEW, ERR_R_MALLOC_FAILURE); 1949 err2: 1950 SSL_CTX_free(ret); 1951 return (NULL); 1952 } 1953 1954 void 1955 SSL_CTX_free(SSL_CTX *a) 1956 { 1957 int i; 1958 1959 if (a == NULL) 1960 return; 1961 1962 i = CRYPTO_add(&a->references, -1, CRYPTO_LOCK_SSL_CTX); 1963 if (i > 0) 1964 return; 1965 1966 if (a->param) 1967 X509_VERIFY_PARAM_free(a->param); 1968 1969 /* 1970 * Free internal session cache. However: the remove_cb() may reference 1971 * the ex_data of SSL_CTX, thus the ex_data store can only be removed 1972 * after the sessions were flushed. 1973 * As the ex_data handling routines might also touch the session cache, 1974 * the most secure solution seems to be: empty (flush) the cache, then 1975 * free ex_data, then finally free the cache. 1976 * (See ticket [openssl.org #212].) 1977 */ 1978 if (a->internal->sessions != NULL) 1979 SSL_CTX_flush_sessions(a, 0); 1980 1981 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_CTX, a, &a->internal->ex_data); 1982 1983 if (a->internal->sessions != NULL) 1984 lh_SSL_SESSION_free(a->internal->sessions); 1985 1986 if (a->cert_store != NULL) 1987 X509_STORE_free(a->cert_store); 1988 if (a->cipher_list != NULL) 1989 sk_SSL_CIPHER_free(a->cipher_list); 1990 if (a->internal->cipher_list_by_id != NULL) 1991 sk_SSL_CIPHER_free(a->internal->cipher_list_by_id); 1992 if (a->internal->cert != NULL) 1993 ssl_cert_free(a->internal->cert); 1994 if (a->internal->client_CA != NULL) 1995 sk_X509_NAME_pop_free(a->internal->client_CA, X509_NAME_free); 1996 if (a->extra_certs != NULL) 1997 sk_X509_pop_free(a->extra_certs, X509_free); 1998 1999 #ifndef OPENSSL_NO_SRTP 2000 if (a->internal->srtp_profiles) 2001 sk_SRTP_PROTECTION_PROFILE_free(a->internal->srtp_profiles); 2002 #endif 2003 2004 #ifndef OPENSSL_NO_ENGINE 2005 if (a->internal->client_cert_engine) 2006 ENGINE_finish(a->internal->client_cert_engine); 2007 #endif 2008 2009 free(a->internal->alpn_client_proto_list); 2010 2011 free(a->internal); 2012 free(a); 2013 } 2014 2015 void 2016 SSL_CTX_set_default_passwd_cb(SSL_CTX *ctx, pem_password_cb *cb) 2017 { 2018 ctx->internal->default_passwd_callback = cb; 2019 } 2020 2021 void 2022 SSL_CTX_set_default_passwd_cb_userdata(SSL_CTX *ctx, void *u) 2023 { 2024 ctx->internal->default_passwd_callback_userdata = u; 2025 } 2026 2027 void 2028 SSL_CTX_set_cert_verify_callback(SSL_CTX *ctx, int (*cb)(X509_STORE_CTX *, 2029 void *), void *arg) 2030 { 2031 ctx->internal->app_verify_callback = cb; 2032 ctx->internal->app_verify_arg = arg; 2033 } 2034 2035 void 2036 SSL_CTX_set_verify(SSL_CTX *ctx, int mode, int (*cb)(int, X509_STORE_CTX *)) 2037 { 2038 ctx->verify_mode = mode; 2039 ctx->internal->default_verify_callback = cb; 2040 } 2041 2042 void 2043 SSL_CTX_set_verify_depth(SSL_CTX *ctx, int depth) 2044 { 2045 X509_VERIFY_PARAM_set_depth(ctx->param, depth); 2046 } 2047 2048 void 2049 ssl_set_cert_masks(CERT *c, const SSL_CIPHER *cipher) 2050 { 2051 int rsa_enc, rsa_sign, dh_tmp, dsa_sign; 2052 int have_ecc_cert, have_ecdh_tmp; 2053 unsigned long mask_k, mask_a; 2054 X509 *x = NULL; 2055 CERT_PKEY *cpk; 2056 2057 if (c == NULL) 2058 return; 2059 2060 dh_tmp = (c->dh_tmp != NULL || c->dh_tmp_cb != NULL || 2061 c->dh_tmp_auto != 0); 2062 2063 have_ecdh_tmp = (c->ecdh_tmp != NULL || c->ecdh_tmp_cb != NULL || 2064 c->ecdh_tmp_auto != 0); 2065 2066 cpk = &(c->pkeys[SSL_PKEY_RSA_ENC]); 2067 rsa_enc = (cpk->x509 != NULL && cpk->privatekey != NULL); 2068 cpk = &(c->pkeys[SSL_PKEY_RSA_SIGN]); 2069 rsa_sign = (cpk->x509 != NULL && cpk->privatekey != NULL); 2070 cpk = &(c->pkeys[SSL_PKEY_DSA_SIGN]); 2071 dsa_sign = (cpk->x509 != NULL && cpk->privatekey != NULL); 2072 /* FIX THIS EAY EAY EAY */ 2073 cpk = &(c->pkeys[SSL_PKEY_ECC]); 2074 have_ecc_cert = (cpk->x509 != NULL && cpk->privatekey != NULL); 2075 mask_k = 0; 2076 mask_a = 0; 2077 2078 cpk = &(c->pkeys[SSL_PKEY_GOST01]); 2079 if (cpk->x509 != NULL && cpk->privatekey !=NULL) { 2080 mask_k |= SSL_kGOST; 2081 mask_a |= SSL_aGOST01; 2082 } 2083 2084 if (rsa_enc) 2085 mask_k|=SSL_kRSA; 2086 2087 if (dh_tmp) 2088 mask_k|=SSL_kDHE; 2089 2090 if (rsa_enc || rsa_sign) 2091 mask_a|=SSL_aRSA; 2092 2093 if (dsa_sign) 2094 mask_a|=SSL_aDSS; 2095 2096 mask_a|=SSL_aNULL; 2097 2098 /* 2099 * An ECC certificate may be usable for ECDH and/or 2100 * ECDSA cipher suites depending on the key usage extension. 2101 */ 2102 if (have_ecc_cert) { 2103 x = (c->pkeys[SSL_PKEY_ECC]).x509; 2104 2105 /* This call populates extension flags (ex_flags). */ 2106 X509_check_purpose(x, -1, 0); 2107 2108 /* Key usage, if present, must allow signing. */ 2109 if ((x->ex_flags & EXFLAG_KUSAGE) == 0 || 2110 (x->ex_kusage & X509v3_KU_DIGITAL_SIGNATURE)) 2111 mask_a|=SSL_aECDSA; 2112 } 2113 2114 if (have_ecdh_tmp) 2115 mask_k|=SSL_kECDHE; 2116 2117 c->mask_k = mask_k; 2118 c->mask_a = mask_a; 2119 c->valid = 1; 2120 } 2121 2122 int 2123 ssl_check_srvr_ecc_cert_and_alg(X509 *x, SSL *s) 2124 { 2125 const SSL_CIPHER *cs = S3I(s)->tmp.new_cipher; 2126 unsigned long alg_a; 2127 2128 alg_a = cs->algorithm_auth; 2129 2130 if (alg_a & SSL_aECDSA) { 2131 /* This call populates extension flags (ex_flags). */ 2132 X509_check_purpose(x, -1, 0); 2133 2134 /* Key usage, if present, must allow signing. */ 2135 if ((x->ex_flags & EXFLAG_KUSAGE) && 2136 ((x->ex_kusage & X509v3_KU_DIGITAL_SIGNATURE) == 0)) { 2137 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, 2138 SSL_R_ECC_CERT_NOT_FOR_SIGNING); 2139 return (0); 2140 } 2141 } 2142 2143 return (1); 2144 } 2145 2146 CERT_PKEY * 2147 ssl_get_server_send_pkey(const SSL *s) 2148 { 2149 unsigned long alg_a; 2150 CERT *c; 2151 int i; 2152 2153 c = s->cert; 2154 ssl_set_cert_masks(c, S3I(s)->tmp.new_cipher); 2155 2156 alg_a = S3I(s)->tmp.new_cipher->algorithm_auth; 2157 2158 if (alg_a & SSL_aECDSA) { 2159 i = SSL_PKEY_ECC; 2160 } else if (alg_a & SSL_aDSS) { 2161 i = SSL_PKEY_DSA_SIGN; 2162 } else if (alg_a & SSL_aRSA) { 2163 if (c->pkeys[SSL_PKEY_RSA_ENC].x509 == NULL) 2164 i = SSL_PKEY_RSA_SIGN; 2165 else 2166 i = SSL_PKEY_RSA_ENC; 2167 } else if (alg_a & SSL_aGOST01) { 2168 i = SSL_PKEY_GOST01; 2169 } else { /* if (alg_a & SSL_aNULL) */ 2170 SSLerr(SSL_F_SSL_GET_SERVER_SEND_PKEY, ERR_R_INTERNAL_ERROR); 2171 return (NULL); 2172 } 2173 2174 return (c->pkeys + i); 2175 } 2176 2177 X509 * 2178 ssl_get_server_send_cert(const SSL *s) 2179 { 2180 CERT_PKEY *cpk; 2181 2182 cpk = ssl_get_server_send_pkey(s); 2183 if (!cpk) 2184 return (NULL); 2185 return (cpk->x509); 2186 } 2187 2188 EVP_PKEY * 2189 ssl_get_sign_pkey(SSL *s, const SSL_CIPHER *cipher, const EVP_MD **pmd) 2190 { 2191 unsigned long alg_a; 2192 CERT *c; 2193 int idx = -1; 2194 2195 alg_a = cipher->algorithm_auth; 2196 c = s->cert; 2197 2198 if ((alg_a & SSL_aDSS) && 2199 (c->pkeys[SSL_PKEY_DSA_SIGN].privatekey != NULL)) 2200 idx = SSL_PKEY_DSA_SIGN; 2201 else if (alg_a & SSL_aRSA) { 2202 if (c->pkeys[SSL_PKEY_RSA_SIGN].privatekey != NULL) 2203 idx = SSL_PKEY_RSA_SIGN; 2204 else if (c->pkeys[SSL_PKEY_RSA_ENC].privatekey != NULL) 2205 idx = SSL_PKEY_RSA_ENC; 2206 } else if ((alg_a & SSL_aECDSA) && 2207 (c->pkeys[SSL_PKEY_ECC].privatekey != NULL)) 2208 idx = SSL_PKEY_ECC; 2209 if (idx == -1) { 2210 SSLerr(SSL_F_SSL_GET_SIGN_PKEY, ERR_R_INTERNAL_ERROR); 2211 return (NULL); 2212 } 2213 if (pmd) 2214 *pmd = c->pkeys[idx].digest; 2215 return (c->pkeys[idx].privatekey); 2216 } 2217 2218 DH * 2219 ssl_get_auto_dh(SSL *s) 2220 { 2221 CERT_PKEY *cpk; 2222 int keylen; 2223 DH *dhp; 2224 2225 if (s->cert->dh_tmp_auto == 2) { 2226 keylen = 1024; 2227 } else if (S3I(s)->tmp.new_cipher->algorithm_auth & SSL_aNULL) { 2228 keylen = 1024; 2229 if (S3I(s)->tmp.new_cipher->strength_bits == 256) 2230 keylen = 3072; 2231 } else { 2232 if ((cpk = ssl_get_server_send_pkey(s)) == NULL) 2233 return (NULL); 2234 if (cpk->privatekey == NULL || cpk->privatekey->pkey.dh == NULL) 2235 return (NULL); 2236 keylen = EVP_PKEY_bits(cpk->privatekey); 2237 } 2238 2239 if ((dhp = DH_new()) == NULL) 2240 return (NULL); 2241 2242 dhp->g = BN_new(); 2243 if (dhp->g != NULL) 2244 BN_set_word(dhp->g, 2); 2245 2246 if (keylen >= 8192) 2247 dhp->p = get_rfc3526_prime_8192(NULL); 2248 else if (keylen >= 4096) 2249 dhp->p = get_rfc3526_prime_4096(NULL); 2250 else if (keylen >= 3072) 2251 dhp->p = get_rfc3526_prime_3072(NULL); 2252 else if (keylen >= 2048) 2253 dhp->p = get_rfc3526_prime_2048(NULL); 2254 else if (keylen >= 1536) 2255 dhp->p = get_rfc3526_prime_1536(NULL); 2256 else 2257 dhp->p = get_rfc2409_prime_1024(NULL); 2258 2259 if (dhp->p == NULL || dhp->g == NULL) { 2260 DH_free(dhp); 2261 return (NULL); 2262 } 2263 return (dhp); 2264 } 2265 2266 void 2267 ssl_update_cache(SSL *s, int mode) 2268 { 2269 int i; 2270 2271 /* 2272 * If the session_id_length is 0, we are not supposed to cache it, 2273 * and it would be rather hard to do anyway :-) 2274 */ 2275 if (s->session->session_id_length == 0) 2276 return; 2277 2278 i = s->session_ctx->internal->session_cache_mode; 2279 if ((i & mode) && (!s->internal->hit) && ((i & SSL_SESS_CACHE_NO_INTERNAL_STORE) 2280 || SSL_CTX_add_session(s->session_ctx, s->session)) 2281 && (s->session_ctx->internal->new_session_cb != NULL)) { 2282 CRYPTO_add(&s->session->references, 1, CRYPTO_LOCK_SSL_SESSION); 2283 if (!s->session_ctx->internal->new_session_cb(s, s->session)) 2284 SSL_SESSION_free(s->session); 2285 } 2286 2287 /* auto flush every 255 connections */ 2288 if ((!(i & SSL_SESS_CACHE_NO_AUTO_CLEAR)) && 2289 ((i & mode) == mode)) { 2290 if ((((mode & SSL_SESS_CACHE_CLIENT) ? 2291 s->session_ctx->internal->stats.sess_connect_good : 2292 s->session_ctx->internal->stats.sess_accept_good) & 0xff) == 0xff) { 2293 SSL_CTX_flush_sessions(s->session_ctx, time(NULL)); 2294 } 2295 } 2296 } 2297 2298 const SSL_METHOD * 2299 SSL_get_ssl_method(SSL *s) 2300 { 2301 return (s->method); 2302 } 2303 2304 int 2305 SSL_set_ssl_method(SSL *s, const SSL_METHOD *meth) 2306 { 2307 int conn = -1; 2308 int ret = 1; 2309 2310 if (s->method != meth) { 2311 if (s->internal->handshake_func != NULL) 2312 conn = (s->internal->handshake_func == s->method->ssl_connect); 2313 2314 if (s->method->version == meth->version) 2315 s->method = meth; 2316 else { 2317 s->method->ssl_free(s); 2318 s->method = meth; 2319 ret = s->method->ssl_new(s); 2320 } 2321 2322 if (conn == 1) 2323 s->internal->handshake_func = meth->ssl_connect; 2324 else if (conn == 0) 2325 s->internal->handshake_func = meth->ssl_accept; 2326 } 2327 return (ret); 2328 } 2329 2330 int 2331 SSL_get_error(const SSL *s, int i) 2332 { 2333 int reason; 2334 unsigned long l; 2335 BIO *bio; 2336 2337 if (i > 0) 2338 return (SSL_ERROR_NONE); 2339 2340 /* Make things return SSL_ERROR_SYSCALL when doing SSL_do_handshake 2341 * etc, where we do encode the error */ 2342 if ((l = ERR_peek_error()) != 0) { 2343 if (ERR_GET_LIB(l) == ERR_LIB_SYS) 2344 return (SSL_ERROR_SYSCALL); 2345 else 2346 return (SSL_ERROR_SSL); 2347 } 2348 2349 if ((i < 0) && SSL_want_read(s)) { 2350 bio = SSL_get_rbio(s); 2351 if (BIO_should_read(bio)) { 2352 return (SSL_ERROR_WANT_READ); 2353 } else if (BIO_should_write(bio)) { 2354 /* 2355 * This one doesn't make too much sense... We never 2356 * try to write to the rbio, and an application 2357 * program where rbio and wbio are separate couldn't 2358 * even know what it should wait for. However if we 2359 * ever set s->internal->rwstate incorrectly (so that we have 2360 * SSL_want_read(s) instead of SSL_want_write(s)) 2361 * and rbio and wbio *are* the same, this test works 2362 * around that bug; so it might be safer to keep it. 2363 */ 2364 return (SSL_ERROR_WANT_WRITE); 2365 } else if (BIO_should_io_special(bio)) { 2366 reason = BIO_get_retry_reason(bio); 2367 if (reason == BIO_RR_CONNECT) 2368 return (SSL_ERROR_WANT_CONNECT); 2369 else if (reason == BIO_RR_ACCEPT) 2370 return (SSL_ERROR_WANT_ACCEPT); 2371 else 2372 return (SSL_ERROR_SYSCALL); /* unknown */ 2373 } 2374 } 2375 2376 if ((i < 0) && SSL_want_write(s)) { 2377 bio = SSL_get_wbio(s); 2378 if (BIO_should_write(bio)) { 2379 return (SSL_ERROR_WANT_WRITE); 2380 } else if (BIO_should_read(bio)) { 2381 /* 2382 * See above (SSL_want_read(s) with 2383 * BIO_should_write(bio)) 2384 */ 2385 return (SSL_ERROR_WANT_READ); 2386 } else if (BIO_should_io_special(bio)) { 2387 reason = BIO_get_retry_reason(bio); 2388 if (reason == BIO_RR_CONNECT) 2389 return (SSL_ERROR_WANT_CONNECT); 2390 else if (reason == BIO_RR_ACCEPT) 2391 return (SSL_ERROR_WANT_ACCEPT); 2392 else 2393 return (SSL_ERROR_SYSCALL); 2394 } 2395 } 2396 if ((i < 0) && SSL_want_x509_lookup(s)) { 2397 return (SSL_ERROR_WANT_X509_LOOKUP); 2398 } 2399 2400 if (i == 0) { 2401 if ((s->internal->shutdown & SSL_RECEIVED_SHUTDOWN) && 2402 (S3I(s)->warn_alert == SSL_AD_CLOSE_NOTIFY)) 2403 return (SSL_ERROR_ZERO_RETURN); 2404 } 2405 return (SSL_ERROR_SYSCALL); 2406 } 2407 2408 int 2409 SSL_do_handshake(SSL *s) 2410 { 2411 int ret = 1; 2412 2413 if (s->internal->handshake_func == NULL) { 2414 SSLerr(SSL_F_SSL_DO_HANDSHAKE, SSL_R_CONNECTION_TYPE_NOT_SET); 2415 return (-1); 2416 } 2417 2418 s->method->ssl_renegotiate_check(s); 2419 2420 if (SSL_in_init(s) || SSL_in_before(s)) { 2421 ret = s->internal->handshake_func(s); 2422 } 2423 return (ret); 2424 } 2425 2426 /* 2427 * For the next 2 functions, SSL_clear() sets shutdown and so 2428 * one of these calls will reset it 2429 */ 2430 void 2431 SSL_set_accept_state(SSL *s) 2432 { 2433 s->server = 1; 2434 s->internal->shutdown = 0; 2435 s->internal->state = SSL_ST_ACCEPT|SSL_ST_BEFORE; 2436 s->internal->handshake_func = s->method->ssl_accept; 2437 /* clear the current cipher */ 2438 ssl_clear_cipher_ctx(s); 2439 ssl_clear_hash_ctx(&s->read_hash); 2440 ssl_clear_hash_ctx(&s->internal->write_hash); 2441 } 2442 2443 void 2444 SSL_set_connect_state(SSL *s) 2445 { 2446 s->server = 0; 2447 s->internal->shutdown = 0; 2448 s->internal->state = SSL_ST_CONNECT|SSL_ST_BEFORE; 2449 s->internal->handshake_func = s->method->ssl_connect; 2450 /* clear the current cipher */ 2451 ssl_clear_cipher_ctx(s); 2452 ssl_clear_hash_ctx(&s->read_hash); 2453 ssl_clear_hash_ctx(&s->internal->write_hash); 2454 } 2455 2456 int 2457 ssl_undefined_function(SSL *s) 2458 { 2459 SSLerr(SSL_F_SSL_UNDEFINED_FUNCTION, 2460 ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); 2461 return (0); 2462 } 2463 2464 int 2465 ssl_undefined_void_function(void) 2466 { 2467 SSLerr(SSL_F_SSL_UNDEFINED_VOID_FUNCTION, 2468 ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); 2469 return (0); 2470 } 2471 2472 int 2473 ssl_undefined_const_function(const SSL *s) 2474 { 2475 SSLerr(SSL_F_SSL_UNDEFINED_CONST_FUNCTION, 2476 ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); 2477 return (0); 2478 } 2479 2480 const char * 2481 ssl_version_string(int ver) 2482 { 2483 switch (ver) { 2484 case DTLS1_VERSION: 2485 return (SSL_TXT_DTLS1); 2486 case TLS1_VERSION: 2487 return (SSL_TXT_TLSV1); 2488 case TLS1_1_VERSION: 2489 return (SSL_TXT_TLSV1_1); 2490 case TLS1_2_VERSION: 2491 return (SSL_TXT_TLSV1_2); 2492 default: 2493 return ("unknown"); 2494 } 2495 } 2496 2497 const char * 2498 SSL_get_version(const SSL *s) 2499 { 2500 return ssl_version_string(s->version); 2501 } 2502 2503 int 2504 ssl_enabled_version_range(SSL *s, uint16_t *min_ver, uint16_t *max_ver) 2505 { 2506 uint16_t min_version, max_version; 2507 2508 /* 2509 * The enabled versions have to be a contiguous range, which means we 2510 * cannot enable and disable single versions at our whim, even though 2511 * this is what the OpenSSL flags allow. The historical way this has 2512 * been handled is by making a flag mean that all higher versions 2513 * are disabled, if any version lower than the flag is enabled. 2514 */ 2515 2516 min_version = 0; 2517 max_version = TLS1_2_VERSION; 2518 2519 if ((s->options & SSL_OP_NO_TLSv1) == 0) 2520 min_version = TLS1_VERSION; 2521 else if ((s->options & SSL_OP_NO_TLSv1_1) == 0) 2522 min_version = TLS1_1_VERSION; 2523 else if ((s->options & SSL_OP_NO_TLSv1_2) == 0) 2524 min_version = TLS1_2_VERSION; 2525 2526 if ((s->options & SSL_OP_NO_TLSv1_2) && min_version < TLS1_2_VERSION) 2527 max_version = TLS1_1_VERSION; 2528 if ((s->options & SSL_OP_NO_TLSv1_1) && min_version < TLS1_1_VERSION) 2529 max_version = TLS1_VERSION; 2530 if ((s->options & SSL_OP_NO_TLSv1) && min_version < TLS1_VERSION) 2531 max_version = 0; 2532 2533 /* Everything has been disabled... */ 2534 if (min_version == 0 || max_version == 0) 2535 return 0; 2536 2537 if (min_ver != NULL) 2538 *min_ver = min_version; 2539 if (max_ver != NULL) 2540 *max_ver = max_version; 2541 2542 return 1; 2543 } 2544 2545 int 2546 ssl_max_shared_version(SSL *s, uint16_t peer_ver, uint16_t *max_ver) 2547 { 2548 uint16_t min_version, max_version, shared_version; 2549 2550 *max_ver = 0; 2551 2552 if (peer_ver >= TLS1_2_VERSION) 2553 shared_version = TLS1_2_VERSION; 2554 else if (peer_ver >= TLS1_1_VERSION) 2555 shared_version = TLS1_1_VERSION; 2556 else if (peer_ver >= TLS1_VERSION) 2557 shared_version = TLS1_VERSION; 2558 else 2559 return 0; 2560 2561 if (!ssl_enabled_version_range(s, &min_version, &max_version)) 2562 return 0; 2563 2564 if (shared_version < min_version) 2565 return 0; 2566 2567 if (shared_version > max_version) 2568 shared_version = max_version; 2569 2570 *max_ver = shared_version; 2571 2572 return 1; 2573 } 2574 2575 uint16_t 2576 ssl_max_server_version(SSL *s) 2577 { 2578 uint16_t max_version; 2579 2580 /* 2581 * The SSL method will be changed during version negotiation, as such 2582 * we want to use the SSL method from the context. 2583 */ 2584 max_version = s->ctx->method->version; 2585 2586 if (SSL_IS_DTLS(s)) 2587 return (DTLS1_VERSION); 2588 2589 if ((s->options & SSL_OP_NO_TLSv1_2) == 0 && 2590 max_version >= TLS1_2_VERSION) 2591 return (TLS1_2_VERSION); 2592 if ((s->options & SSL_OP_NO_TLSv1_1) == 0 && 2593 max_version >= TLS1_1_VERSION) 2594 return (TLS1_1_VERSION); 2595 if ((s->options & SSL_OP_NO_TLSv1) == 0 && 2596 max_version >= TLS1_VERSION) 2597 return (TLS1_VERSION); 2598 2599 return (0); 2600 } 2601 2602 SSL * 2603 SSL_dup(SSL *s) 2604 { 2605 STACK_OF(X509_NAME) *sk; 2606 X509_NAME *xn; 2607 SSL *ret; 2608 int i; 2609 2610 if ((ret = SSL_new(SSL_get_SSL_CTX(s))) == NULL) 2611 return (NULL); 2612 2613 ret->version = s->version; 2614 ret->internal->type = s->internal->type; 2615 ret->method = s->method; 2616 2617 if (s->session != NULL) { 2618 /* This copies session-id, SSL_METHOD, sid_ctx, and 'cert' */ 2619 SSL_copy_session_id(ret, s); 2620 } else { 2621 /* 2622 * No session has been established yet, so we have to expect 2623 * that s->cert or ret->cert will be changed later -- 2624 * they should not both point to the same object, 2625 * and thus we can't use SSL_copy_session_id. 2626 */ 2627 2628 ret->method->ssl_free(ret); 2629 ret->method = s->method; 2630 ret->method->ssl_new(ret); 2631 2632 if (s->cert != NULL) { 2633 if (ret->cert != NULL) { 2634 ssl_cert_free(ret->cert); 2635 } 2636 ret->cert = ssl_cert_dup(s->cert); 2637 if (ret->cert == NULL) 2638 goto err; 2639 } 2640 2641 SSL_set_session_id_context(ret, 2642 s->sid_ctx, s->sid_ctx_length); 2643 } 2644 2645 ret->options = s->options; 2646 ret->mode = s->mode; 2647 SSL_set_max_cert_list(ret, SSL_get_max_cert_list(s)); 2648 SSL_set_read_ahead(ret, SSL_get_read_ahead(s)); 2649 ret->internal->msg_callback = s->internal->msg_callback; 2650 ret->internal->msg_callback_arg = s->internal->msg_callback_arg; 2651 SSL_set_verify(ret, SSL_get_verify_mode(s), 2652 SSL_get_verify_callback(s)); 2653 SSL_set_verify_depth(ret, SSL_get_verify_depth(s)); 2654 ret->internal->generate_session_id = s->internal->generate_session_id; 2655 2656 SSL_set_info_callback(ret, SSL_get_info_callback(s)); 2657 2658 ret->internal->debug = s->internal->debug; 2659 2660 /* copy app data, a little dangerous perhaps */ 2661 if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_SSL, 2662 &ret->internal->ex_data, &s->internal->ex_data)) 2663 goto err; 2664 2665 /* setup rbio, and wbio */ 2666 if (s->rbio != NULL) { 2667 if (!BIO_dup_state(s->rbio,(char *)&ret->rbio)) 2668 goto err; 2669 } 2670 if (s->wbio != NULL) { 2671 if (s->wbio != s->rbio) { 2672 if (!BIO_dup_state(s->wbio,(char *)&ret->wbio)) 2673 goto err; 2674 } else 2675 ret->wbio = ret->rbio; 2676 } 2677 ret->internal->rwstate = s->internal->rwstate; 2678 ret->internal->in_handshake = s->internal->in_handshake; 2679 ret->internal->handshake_func = s->internal->handshake_func; 2680 ret->server = s->server; 2681 ret->internal->renegotiate = s->internal->renegotiate; 2682 ret->internal->new_session = s->internal->new_session; 2683 ret->internal->quiet_shutdown = s->internal->quiet_shutdown; 2684 ret->internal->shutdown = s->internal->shutdown; 2685 /* SSL_dup does not really work at any state, though */ 2686 ret->internal->state = s->internal->state; 2687 ret->internal->rstate = s->internal->rstate; 2688 2689 /* 2690 * Would have to copy ret->init_buf, ret->init_msg, ret->init_num, 2691 * ret->init_off 2692 */ 2693 ret->internal->init_num = 0; 2694 2695 ret->internal->hit = s->internal->hit; 2696 2697 X509_VERIFY_PARAM_inherit(ret->param, s->param); 2698 2699 /* dup the cipher_list and cipher_list_by_id stacks */ 2700 if (s->cipher_list != NULL) { 2701 if ((ret->cipher_list = 2702 sk_SSL_CIPHER_dup(s->cipher_list)) == NULL) 2703 goto err; 2704 } 2705 if (s->internal->cipher_list_by_id != NULL) { 2706 if ((ret->internal->cipher_list_by_id = 2707 sk_SSL_CIPHER_dup(s->internal->cipher_list_by_id)) == NULL) 2708 goto err; 2709 } 2710 2711 /* Dup the client_CA list */ 2712 if (s->internal->client_CA != NULL) { 2713 if ((sk = sk_X509_NAME_dup(s->internal->client_CA)) == NULL) goto err; 2714 ret->internal->client_CA = sk; 2715 for (i = 0; i < sk_X509_NAME_num(sk); i++) { 2716 xn = sk_X509_NAME_value(sk, i); 2717 if (sk_X509_NAME_set(sk, i, 2718 X509_NAME_dup(xn)) == NULL) { 2719 X509_NAME_free(xn); 2720 goto err; 2721 } 2722 } 2723 } 2724 2725 if (0) { 2726 err: 2727 if (ret != NULL) 2728 SSL_free(ret); 2729 ret = NULL; 2730 } 2731 return (ret); 2732 } 2733 2734 void 2735 ssl_clear_cipher_ctx(SSL *s) 2736 { 2737 EVP_CIPHER_CTX_free(s->enc_read_ctx); 2738 s->enc_read_ctx = NULL; 2739 EVP_CIPHER_CTX_free(s->internal->enc_write_ctx); 2740 s->internal->enc_write_ctx = NULL; 2741 2742 if (s->internal->aead_read_ctx != NULL) { 2743 EVP_AEAD_CTX_cleanup(&s->internal->aead_read_ctx->ctx); 2744 free(s->internal->aead_read_ctx); 2745 s->internal->aead_read_ctx = NULL; 2746 } 2747 if (s->internal->aead_write_ctx != NULL) { 2748 EVP_AEAD_CTX_cleanup(&s->internal->aead_write_ctx->ctx); 2749 free(s->internal->aead_write_ctx); 2750 s->internal->aead_write_ctx = NULL; 2751 } 2752 2753 } 2754 2755 /* Fix this function so that it takes an optional type parameter */ 2756 X509 * 2757 SSL_get_certificate(const SSL *s) 2758 { 2759 if (s->cert != NULL) 2760 return (s->cert->key->x509); 2761 else 2762 return (NULL); 2763 } 2764 2765 /* Fix this function so that it takes an optional type parameter */ 2766 EVP_PKEY * 2767 SSL_get_privatekey(SSL *s) 2768 { 2769 if (s->cert != NULL) 2770 return (s->cert->key->privatekey); 2771 else 2772 return (NULL); 2773 } 2774 2775 const SSL_CIPHER * 2776 SSL_get_current_cipher(const SSL *s) 2777 { 2778 if ((s->session != NULL) && (s->session->cipher != NULL)) 2779 return (s->session->cipher); 2780 return (NULL); 2781 } 2782 const void * 2783 SSL_get_current_compression(SSL *s) 2784 { 2785 return (NULL); 2786 } 2787 2788 const void * 2789 SSL_get_current_expansion(SSL *s) 2790 { 2791 return (NULL); 2792 } 2793 2794 int 2795 ssl_init_wbio_buffer(SSL *s, int push) 2796 { 2797 BIO *bbio; 2798 2799 if (s->bbio == NULL) { 2800 bbio = BIO_new(BIO_f_buffer()); 2801 if (bbio == NULL) 2802 return (0); 2803 s->bbio = bbio; 2804 } else { 2805 bbio = s->bbio; 2806 if (s->bbio == s->wbio) 2807 s->wbio = BIO_pop(s->wbio); 2808 } 2809 (void)BIO_reset(bbio); 2810 /* if (!BIO_set_write_buffer_size(bbio,16*1024)) */ 2811 if (!BIO_set_read_buffer_size(bbio, 1)) { 2812 SSLerr(SSL_F_SSL_INIT_WBIO_BUFFER, ERR_R_BUF_LIB); 2813 return (0); 2814 } 2815 if (push) { 2816 if (s->wbio != bbio) 2817 s->wbio = BIO_push(bbio, s->wbio); 2818 } else { 2819 if (s->wbio == bbio) 2820 s->wbio = BIO_pop(bbio); 2821 } 2822 return (1); 2823 } 2824 2825 void 2826 ssl_free_wbio_buffer(SSL *s) 2827 { 2828 if (s == NULL) 2829 return; 2830 2831 if (s->bbio == NULL) 2832 return; 2833 2834 if (s->bbio == s->wbio) { 2835 /* remove buffering */ 2836 s->wbio = BIO_pop(s->wbio); 2837 } 2838 BIO_free(s->bbio); 2839 s->bbio = NULL; 2840 } 2841 2842 void 2843 SSL_CTX_set_quiet_shutdown(SSL_CTX *ctx, int mode) 2844 { 2845 ctx->internal->quiet_shutdown = mode; 2846 } 2847 2848 int 2849 SSL_CTX_get_quiet_shutdown(const SSL_CTX *ctx) 2850 { 2851 return (ctx->internal->quiet_shutdown); 2852 } 2853 2854 void 2855 SSL_set_quiet_shutdown(SSL *s, int mode) 2856 { 2857 s->internal->quiet_shutdown = mode; 2858 } 2859 2860 int 2861 SSL_get_quiet_shutdown(const SSL *s) 2862 { 2863 return (s->internal->quiet_shutdown); 2864 } 2865 2866 void 2867 SSL_set_shutdown(SSL *s, int mode) 2868 { 2869 s->internal->shutdown = mode; 2870 } 2871 2872 int 2873 SSL_get_shutdown(const SSL *s) 2874 { 2875 return (s->internal->shutdown); 2876 } 2877 2878 int 2879 SSL_version(const SSL *s) 2880 { 2881 return (s->version); 2882 } 2883 2884 SSL_CTX * 2885 SSL_get_SSL_CTX(const SSL *ssl) 2886 { 2887 return (ssl->ctx); 2888 } 2889 2890 SSL_CTX * 2891 SSL_set_SSL_CTX(SSL *ssl, SSL_CTX* ctx) 2892 { 2893 CERT *ocert = ssl->cert; 2894 2895 if (ssl->ctx == ctx) 2896 return (ssl->ctx); 2897 if (ctx == NULL) 2898 ctx = ssl->initial_ctx; 2899 ssl->cert = ssl_cert_dup(ctx->internal->cert); 2900 if (ocert != NULL) { 2901 int i; 2902 /* Copy negotiated digests from original certificate. */ 2903 for (i = 0; i < SSL_PKEY_NUM; i++) 2904 ssl->cert->pkeys[i].digest = ocert->pkeys[i].digest; 2905 ssl_cert_free(ocert); 2906 } 2907 CRYPTO_add(&ctx->references, 1, CRYPTO_LOCK_SSL_CTX); 2908 SSL_CTX_free(ssl->ctx); /* decrement reference count */ 2909 ssl->ctx = ctx; 2910 return (ssl->ctx); 2911 } 2912 2913 int 2914 SSL_CTX_set_default_verify_paths(SSL_CTX *ctx) 2915 { 2916 return (X509_STORE_set_default_paths(ctx->cert_store)); 2917 } 2918 2919 int 2920 SSL_CTX_load_verify_locations(SSL_CTX *ctx, const char *CAfile, 2921 const char *CApath) 2922 { 2923 return (X509_STORE_load_locations(ctx->cert_store, CAfile, CApath)); 2924 } 2925 2926 int 2927 SSL_CTX_load_verify_mem(SSL_CTX *ctx, void *buf, int len) 2928 { 2929 return (X509_STORE_load_mem(ctx->cert_store, buf, len)); 2930 } 2931 2932 void 2933 SSL_set_info_callback(SSL *ssl, void (*cb)(const SSL *ssl, int type, int val)) 2934 { 2935 ssl->internal->info_callback = cb; 2936 } 2937 2938 void (*SSL_get_info_callback(const SSL *ssl))(const SSL *ssl, int type, int val) 2939 { 2940 return (ssl->internal->info_callback); 2941 } 2942 2943 int 2944 SSL_state(const SSL *ssl) 2945 { 2946 return (ssl->internal->state); 2947 } 2948 2949 void 2950 SSL_set_state(SSL *ssl, int state) 2951 { 2952 ssl->internal->state = state; 2953 } 2954 2955 void 2956 SSL_set_verify_result(SSL *ssl, long arg) 2957 { 2958 ssl->verify_result = arg; 2959 } 2960 2961 long 2962 SSL_get_verify_result(const SSL *ssl) 2963 { 2964 return (ssl->verify_result); 2965 } 2966 2967 int 2968 SSL_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func, 2969 CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func) 2970 { 2971 return (CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL, argl, argp, 2972 new_func, dup_func, free_func)); 2973 } 2974 2975 int 2976 SSL_set_ex_data(SSL *s, int idx, void *arg) 2977 { 2978 return (CRYPTO_set_ex_data(&s->internal->ex_data, idx, arg)); 2979 } 2980 2981 void * 2982 SSL_get_ex_data(const SSL *s, int idx) 2983 { 2984 return (CRYPTO_get_ex_data(&s->internal->ex_data, idx)); 2985 } 2986 2987 int 2988 SSL_CTX_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func, 2989 CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func) 2990 { 2991 return (CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL_CTX, argl, argp, 2992 new_func, dup_func, free_func)); 2993 } 2994 2995 int 2996 SSL_CTX_set_ex_data(SSL_CTX *s, int idx, void *arg) 2997 { 2998 return (CRYPTO_set_ex_data(&s->internal->ex_data, idx, arg)); 2999 } 3000 3001 void * 3002 SSL_CTX_get_ex_data(const SSL_CTX *s, int idx) 3003 { 3004 return (CRYPTO_get_ex_data(&s->internal->ex_data, idx)); 3005 } 3006 3007 int 3008 ssl_ok(SSL *s) 3009 { 3010 return (1); 3011 } 3012 3013 X509_STORE * 3014 SSL_CTX_get_cert_store(const SSL_CTX *ctx) 3015 { 3016 return (ctx->cert_store); 3017 } 3018 3019 void 3020 SSL_CTX_set_cert_store(SSL_CTX *ctx, X509_STORE *store) 3021 { 3022 if (ctx->cert_store != NULL) 3023 X509_STORE_free(ctx->cert_store); 3024 ctx->cert_store = store; 3025 } 3026 3027 int 3028 SSL_want(const SSL *s) 3029 { 3030 return (s->internal->rwstate); 3031 } 3032 3033 void 3034 SSL_CTX_set_tmp_rsa_callback(SSL_CTX *ctx, RSA *(*cb)(SSL *ssl, int is_export, 3035 int keylength)) 3036 { 3037 SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb); 3038 } 3039 3040 void 3041 SSL_set_tmp_rsa_callback(SSL *ssl, RSA *(*cb)(SSL *ssl, int is_export, 3042 int keylength)) 3043 { 3044 SSL_callback_ctrl(ssl, SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb); 3045 } 3046 3047 void 3048 SSL_CTX_set_tmp_dh_callback(SSL_CTX *ctx, DH *(*dh)(SSL *ssl, int is_export, 3049 int keylength)) 3050 { 3051 SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh); 3052 } 3053 3054 void 3055 SSL_set_tmp_dh_callback(SSL *ssl, DH *(*dh)(SSL *ssl, int is_export, 3056 int keylength)) 3057 { 3058 SSL_callback_ctrl(ssl, SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh); 3059 } 3060 3061 void 3062 SSL_CTX_set_tmp_ecdh_callback(SSL_CTX *ctx, EC_KEY *(*ecdh)(SSL *ssl, 3063 int is_export, int keylength)) 3064 { 3065 SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_TMP_ECDH_CB, 3066 (void (*)(void))ecdh); 3067 } 3068 3069 void 3070 SSL_set_tmp_ecdh_callback(SSL *ssl, EC_KEY *(*ecdh)(SSL *ssl, int is_export, 3071 int keylength)) 3072 { 3073 SSL_callback_ctrl(ssl, SSL_CTRL_SET_TMP_ECDH_CB,(void (*)(void))ecdh); 3074 } 3075 3076 3077 void 3078 SSL_CTX_set_msg_callback(SSL_CTX *ctx, void (*cb)(int write_p, int version, 3079 int content_type, const void *buf, size_t len, SSL *ssl, void *arg)) 3080 { 3081 SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_MSG_CALLBACK, 3082 (void (*)(void))cb); 3083 } 3084 3085 void 3086 SSL_set_msg_callback(SSL *ssl, void (*cb)(int write_p, int version, 3087 int content_type, const void *buf, size_t len, SSL *ssl, void *arg)) 3088 { 3089 SSL_callback_ctrl(ssl, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb); 3090 } 3091 3092 void 3093 ssl_clear_hash_ctx(EVP_MD_CTX **hash) 3094 { 3095 if (*hash) 3096 EVP_MD_CTX_destroy(*hash); 3097 *hash = NULL; 3098 } 3099 3100 void 3101 SSL_set_debug(SSL *s, int debug) 3102 { 3103 s->internal->debug = debug; 3104 } 3105 3106 int 3107 SSL_cache_hit(SSL *s) 3108 { 3109 return (s->internal->hit); 3110 } 3111 3112 3113 static int 3114 ssl_cipher_id_cmp_BSEARCH_CMP_FN(const void *a_, const void *b_) 3115 { 3116 SSL_CIPHER const *a = a_; 3117 SSL_CIPHER const *b = b_; 3118 return ssl_cipher_id_cmp(a, b); 3119 } 3120 3121 SSL_CIPHER * 3122 OBJ_bsearch_ssl_cipher_id(SSL_CIPHER *key, SSL_CIPHER const *base, int num) 3123 { 3124 return (SSL_CIPHER *)OBJ_bsearch_(key, base, num, sizeof(SSL_CIPHER), 3125 ssl_cipher_id_cmp_BSEARCH_CMP_FN); 3126 } 3127