1 /* $OpenBSD: ssl_ciph.c,v 1.105 2018/09/08 14:39:41 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 <openssl/objects.h> 146 147 #ifndef OPENSSL_NO_ENGINE 148 #include <openssl/engine.h> 149 #endif 150 151 #include "ssl_locl.h" 152 153 #define SSL_ENC_3DES_IDX 0 154 #define SSL_ENC_RC4_IDX 1 155 #define SSL_ENC_NULL_IDX 2 156 #define SSL_ENC_AES128_IDX 3 157 #define SSL_ENC_AES256_IDX 4 158 #define SSL_ENC_CAMELLIA128_IDX 5 159 #define SSL_ENC_CAMELLIA256_IDX 6 160 #define SSL_ENC_GOST89_IDX 7 161 #define SSL_ENC_NUM_IDX 8 162 163 static const EVP_CIPHER *ssl_cipher_methods[SSL_ENC_NUM_IDX] = { 164 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, 165 }; 166 167 #define SSL_MD_MD5_IDX 0 168 #define SSL_MD_SHA1_IDX 1 169 #define SSL_MD_GOST94_IDX 2 170 #define SSL_MD_GOST89MAC_IDX 3 171 #define SSL_MD_SHA256_IDX 4 172 #define SSL_MD_SHA384_IDX 5 173 #define SSL_MD_STREEBOG256_IDX 6 174 #define SSL_MD_NUM_IDX 7 175 static const EVP_MD *ssl_digest_methods[SSL_MD_NUM_IDX] = { 176 NULL, NULL, NULL, NULL, NULL, NULL, NULL, 177 }; 178 179 static int ssl_mac_pkey_id[SSL_MD_NUM_IDX] = { 180 EVP_PKEY_HMAC, EVP_PKEY_HMAC, EVP_PKEY_HMAC, EVP_PKEY_GOSTIMIT, 181 EVP_PKEY_HMAC, EVP_PKEY_HMAC, EVP_PKEY_HMAC, 182 }; 183 184 static int ssl_mac_secret_size[SSL_MD_NUM_IDX] = { 185 0, 0, 0, 0, 0, 0, 0, 186 }; 187 188 #define CIPHER_ADD 1 189 #define CIPHER_KILL 2 190 #define CIPHER_DEL 3 191 #define CIPHER_ORD 4 192 #define CIPHER_SPECIAL 5 193 194 typedef struct cipher_order_st { 195 const SSL_CIPHER *cipher; 196 int active; 197 int dead; 198 struct cipher_order_st *next, *prev; 199 } CIPHER_ORDER; 200 201 static const SSL_CIPHER cipher_aliases[] = { 202 203 /* "ALL" doesn't include eNULL (must be specifically enabled) */ 204 { 205 .name = SSL_TXT_ALL, 206 .algorithm_enc = ~SSL_eNULL, 207 }, 208 209 /* "COMPLEMENTOFALL" */ 210 { 211 .name = SSL_TXT_CMPALL, 212 .algorithm_enc = SSL_eNULL, 213 }, 214 215 /* 216 * "COMPLEMENTOFDEFAULT" 217 * (does *not* include ciphersuites not found in ALL!) 218 */ 219 { 220 .name = SSL_TXT_CMPDEF, 221 .algorithm_mkey = SSL_kDHE|SSL_kECDHE, 222 .algorithm_auth = SSL_aNULL, 223 .algorithm_enc = ~SSL_eNULL, 224 }, 225 226 /* 227 * key exchange aliases 228 * (some of those using only a single bit here combine multiple key 229 * exchange algs according to the RFCs, e.g. kEDH combines DHE_DSS 230 * and DHE_RSA) 231 */ 232 { 233 .name = SSL_TXT_kRSA, 234 .algorithm_mkey = SSL_kRSA, 235 }, 236 { 237 .name = SSL_TXT_kEDH, 238 .algorithm_mkey = SSL_kDHE, 239 }, 240 { 241 .name = SSL_TXT_DH, 242 .algorithm_mkey = SSL_kDHE, 243 }, 244 { 245 .name = SSL_TXT_kEECDH, 246 .algorithm_mkey = SSL_kECDHE, 247 }, 248 { 249 .name = SSL_TXT_ECDH, 250 .algorithm_mkey = SSL_kECDHE, 251 }, 252 { 253 .name = SSL_TXT_kGOST, 254 .algorithm_mkey = SSL_kGOST, 255 }, 256 257 /* server authentication aliases */ 258 { 259 .name = SSL_TXT_aRSA, 260 .algorithm_auth = SSL_aRSA, 261 }, 262 { 263 .name = SSL_TXT_aDSS, 264 .algorithm_auth = SSL_aDSS, 265 }, 266 { 267 .name = SSL_TXT_DSS, 268 .algorithm_auth = SSL_aDSS, 269 }, 270 { 271 .name = SSL_TXT_aNULL, 272 .algorithm_auth = SSL_aNULL, 273 }, 274 { 275 .name = SSL_TXT_aECDSA, 276 .algorithm_auth = SSL_aECDSA, 277 }, 278 { 279 .name = SSL_TXT_ECDSA, 280 .algorithm_auth = SSL_aECDSA, 281 }, 282 { 283 .name = SSL_TXT_aGOST01, 284 .algorithm_auth = SSL_aGOST01, 285 }, 286 { 287 .name = SSL_TXT_aGOST, 288 .algorithm_auth = SSL_aGOST01, 289 }, 290 291 /* aliases combining key exchange and server authentication */ 292 { 293 .name = SSL_TXT_DHE, 294 .algorithm_mkey = SSL_kDHE, 295 .algorithm_auth = ~SSL_aNULL, 296 }, 297 { 298 .name = SSL_TXT_EDH, 299 .algorithm_mkey = SSL_kDHE, 300 .algorithm_auth = ~SSL_aNULL, 301 }, 302 { 303 .name = SSL_TXT_ECDHE, 304 .algorithm_mkey = SSL_kECDHE, 305 .algorithm_auth = ~SSL_aNULL, 306 }, 307 { 308 .name = SSL_TXT_EECDH, 309 .algorithm_mkey = SSL_kECDHE, 310 .algorithm_auth = ~SSL_aNULL, 311 }, 312 { 313 .name = SSL_TXT_NULL, 314 .algorithm_enc = SSL_eNULL, 315 }, 316 { 317 .name = SSL_TXT_RSA, 318 .algorithm_mkey = SSL_kRSA, 319 .algorithm_auth = SSL_aRSA, 320 }, 321 { 322 .name = SSL_TXT_ADH, 323 .algorithm_mkey = SSL_kDHE, 324 .algorithm_auth = SSL_aNULL, 325 }, 326 { 327 .name = SSL_TXT_AECDH, 328 .algorithm_mkey = SSL_kECDHE, 329 .algorithm_auth = SSL_aNULL, 330 }, 331 332 /* symmetric encryption aliases */ 333 { 334 .name = SSL_TXT_3DES, 335 .algorithm_enc = SSL_3DES, 336 }, 337 { 338 .name = SSL_TXT_RC4, 339 .algorithm_enc = SSL_RC4, 340 }, 341 { 342 .name = SSL_TXT_eNULL, 343 .algorithm_enc = SSL_eNULL, 344 }, 345 { 346 .name = SSL_TXT_AES128, 347 .algorithm_enc = SSL_AES128|SSL_AES128GCM, 348 }, 349 { 350 .name = SSL_TXT_AES256, 351 .algorithm_enc = SSL_AES256|SSL_AES256GCM, 352 }, 353 { 354 .name = SSL_TXT_AES, 355 .algorithm_enc = SSL_AES, 356 }, 357 { 358 .name = SSL_TXT_AES_GCM, 359 .algorithm_enc = SSL_AES128GCM|SSL_AES256GCM, 360 }, 361 { 362 .name = SSL_TXT_CAMELLIA128, 363 .algorithm_enc = SSL_CAMELLIA128, 364 }, 365 { 366 .name = SSL_TXT_CAMELLIA256, 367 .algorithm_enc = SSL_CAMELLIA256, 368 }, 369 { 370 .name = SSL_TXT_CAMELLIA, 371 .algorithm_enc = SSL_CAMELLIA128|SSL_CAMELLIA256, 372 }, 373 { 374 .name = SSL_TXT_CHACHA20, 375 .algorithm_enc = SSL_CHACHA20POLY1305, 376 }, 377 378 /* MAC aliases */ 379 { 380 .name = SSL_TXT_AEAD, 381 .algorithm_mac = SSL_AEAD, 382 }, 383 { 384 .name = SSL_TXT_MD5, 385 .algorithm_mac = SSL_MD5, 386 }, 387 { 388 .name = SSL_TXT_SHA1, 389 .algorithm_mac = SSL_SHA1, 390 }, 391 { 392 .name = SSL_TXT_SHA, 393 .algorithm_mac = SSL_SHA1, 394 }, 395 { 396 .name = SSL_TXT_GOST94, 397 .algorithm_mac = SSL_GOST94, 398 }, 399 { 400 .name = SSL_TXT_GOST89MAC, 401 .algorithm_mac = SSL_GOST89MAC, 402 }, 403 { 404 .name = SSL_TXT_SHA256, 405 .algorithm_mac = SSL_SHA256, 406 }, 407 { 408 .name = SSL_TXT_SHA384, 409 .algorithm_mac = SSL_SHA384, 410 }, 411 { 412 .name = SSL_TXT_STREEBOG256, 413 .algorithm_mac = SSL_STREEBOG256, 414 }, 415 416 /* protocol version aliases */ 417 { 418 .name = SSL_TXT_SSLV3, 419 .algorithm_ssl = SSL_SSLV3, 420 }, 421 { 422 .name = SSL_TXT_TLSV1, 423 .algorithm_ssl = SSL_TLSV1, 424 }, 425 { 426 .name = SSL_TXT_TLSV1_2, 427 .algorithm_ssl = SSL_TLSV1_2, 428 }, 429 430 /* strength classes */ 431 { 432 .name = SSL_TXT_LOW, 433 .algo_strength = SSL_LOW, 434 }, 435 { 436 .name = SSL_TXT_MEDIUM, 437 .algo_strength = SSL_MEDIUM, 438 }, 439 { 440 .name = SSL_TXT_HIGH, 441 .algo_strength = SSL_HIGH, 442 }, 443 }; 444 445 void 446 ssl_load_ciphers(void) 447 { 448 ssl_cipher_methods[SSL_ENC_3DES_IDX] = 449 EVP_get_cipherbyname(SN_des_ede3_cbc); 450 ssl_cipher_methods[SSL_ENC_RC4_IDX] = 451 EVP_get_cipherbyname(SN_rc4); 452 ssl_cipher_methods[SSL_ENC_AES128_IDX] = 453 EVP_get_cipherbyname(SN_aes_128_cbc); 454 ssl_cipher_methods[SSL_ENC_AES256_IDX] = 455 EVP_get_cipherbyname(SN_aes_256_cbc); 456 ssl_cipher_methods[SSL_ENC_CAMELLIA128_IDX] = 457 EVP_get_cipherbyname(SN_camellia_128_cbc); 458 ssl_cipher_methods[SSL_ENC_CAMELLIA256_IDX] = 459 EVP_get_cipherbyname(SN_camellia_256_cbc); 460 ssl_cipher_methods[SSL_ENC_GOST89_IDX] = 461 EVP_get_cipherbyname(SN_gost89_cnt); 462 463 ssl_digest_methods[SSL_MD_MD5_IDX] = 464 EVP_get_digestbyname(SN_md5); 465 ssl_mac_secret_size[SSL_MD_MD5_IDX] = 466 EVP_MD_size(ssl_digest_methods[SSL_MD_MD5_IDX]); 467 OPENSSL_assert(ssl_mac_secret_size[SSL_MD_MD5_IDX] >= 0); 468 ssl_digest_methods[SSL_MD_SHA1_IDX] = 469 EVP_get_digestbyname(SN_sha1); 470 ssl_mac_secret_size[SSL_MD_SHA1_IDX] = 471 EVP_MD_size(ssl_digest_methods[SSL_MD_SHA1_IDX]); 472 OPENSSL_assert(ssl_mac_secret_size[SSL_MD_SHA1_IDX] >= 0); 473 ssl_digest_methods[SSL_MD_GOST94_IDX] = 474 EVP_get_digestbyname(SN_id_GostR3411_94); 475 if (ssl_digest_methods[SSL_MD_GOST94_IDX]) { 476 ssl_mac_secret_size[SSL_MD_GOST94_IDX] = 477 EVP_MD_size(ssl_digest_methods[SSL_MD_GOST94_IDX]); 478 OPENSSL_assert(ssl_mac_secret_size[SSL_MD_GOST94_IDX] >= 0); 479 } 480 ssl_digest_methods[SSL_MD_GOST89MAC_IDX] = 481 EVP_get_digestbyname(SN_id_Gost28147_89_MAC); 482 if (ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX]) { 483 ssl_mac_secret_size[SSL_MD_GOST89MAC_IDX] = 32; 484 } 485 486 ssl_digest_methods[SSL_MD_SHA256_IDX] = 487 EVP_get_digestbyname(SN_sha256); 488 ssl_mac_secret_size[SSL_MD_SHA256_IDX] = 489 EVP_MD_size(ssl_digest_methods[SSL_MD_SHA256_IDX]); 490 ssl_digest_methods[SSL_MD_SHA384_IDX] = 491 EVP_get_digestbyname(SN_sha384); 492 ssl_mac_secret_size[SSL_MD_SHA384_IDX] = 493 EVP_MD_size(ssl_digest_methods[SSL_MD_SHA384_IDX]); 494 ssl_digest_methods[SSL_MD_STREEBOG256_IDX] = 495 EVP_get_digestbyname(SN_id_tc26_gost3411_2012_256); 496 ssl_mac_secret_size[SSL_MD_STREEBOG256_IDX] = 497 EVP_MD_size(ssl_digest_methods[SSL_MD_STREEBOG256_IDX]); 498 } 499 500 int 501 ssl_cipher_get_evp(const SSL_SESSION *s, const EVP_CIPHER **enc, 502 const EVP_MD **md, int *mac_pkey_type, int *mac_secret_size) 503 { 504 const SSL_CIPHER *c; 505 int i; 506 507 c = s->cipher; 508 if (c == NULL) 509 return (0); 510 511 /* 512 * This function does not handle EVP_AEAD. 513 * See ssl_cipher_get_aead_evp instead. 514 */ 515 if (c->algorithm_mac & SSL_AEAD) 516 return(0); 517 518 if ((enc == NULL) || (md == NULL)) 519 return (0); 520 521 switch (c->algorithm_enc) { 522 case SSL_3DES: 523 i = SSL_ENC_3DES_IDX; 524 break; 525 case SSL_RC4: 526 i = SSL_ENC_RC4_IDX; 527 break; 528 case SSL_eNULL: 529 i = SSL_ENC_NULL_IDX; 530 break; 531 case SSL_AES128: 532 i = SSL_ENC_AES128_IDX; 533 break; 534 case SSL_AES256: 535 i = SSL_ENC_AES256_IDX; 536 break; 537 case SSL_CAMELLIA128: 538 i = SSL_ENC_CAMELLIA128_IDX; 539 break; 540 case SSL_CAMELLIA256: 541 i = SSL_ENC_CAMELLIA256_IDX; 542 break; 543 case SSL_eGOST2814789CNT: 544 i = SSL_ENC_GOST89_IDX; 545 break; 546 default: 547 i = -1; 548 break; 549 } 550 551 if ((i < 0) || (i >= SSL_ENC_NUM_IDX)) 552 *enc = NULL; 553 else { 554 if (i == SSL_ENC_NULL_IDX) 555 *enc = EVP_enc_null(); 556 else 557 *enc = ssl_cipher_methods[i]; 558 } 559 560 switch (c->algorithm_mac) { 561 case SSL_MD5: 562 i = SSL_MD_MD5_IDX; 563 break; 564 case SSL_SHA1: 565 i = SSL_MD_SHA1_IDX; 566 break; 567 case SSL_SHA256: 568 i = SSL_MD_SHA256_IDX; 569 break; 570 case SSL_SHA384: 571 i = SSL_MD_SHA384_IDX; 572 break; 573 case SSL_GOST94: 574 i = SSL_MD_GOST94_IDX; 575 break; 576 case SSL_GOST89MAC: 577 i = SSL_MD_GOST89MAC_IDX; 578 break; 579 case SSL_STREEBOG256: 580 i = SSL_MD_STREEBOG256_IDX; 581 break; 582 default: 583 i = -1; 584 break; 585 } 586 if ((i < 0) || (i >= SSL_MD_NUM_IDX)) { 587 *md = NULL; 588 589 if (mac_pkey_type != NULL) 590 *mac_pkey_type = NID_undef; 591 if (mac_secret_size != NULL) 592 *mac_secret_size = 0; 593 } else { 594 *md = ssl_digest_methods[i]; 595 if (mac_pkey_type != NULL) 596 *mac_pkey_type = ssl_mac_pkey_id[i]; 597 if (mac_secret_size != NULL) 598 *mac_secret_size = ssl_mac_secret_size[i]; 599 } 600 601 if (*enc == NULL || *md == NULL || 602 (mac_pkey_type != NULL && *mac_pkey_type == NID_undef)) 603 return 0; 604 605 /* 606 * EVP_CIPH_FLAG_AEAD_CIPHER and EVP_CIPH_GCM_MODE ciphers are not 607 * supported via EVP_CIPHER (they should be using EVP_AEAD instead). 608 */ 609 if (EVP_CIPHER_flags(*enc) & EVP_CIPH_FLAG_AEAD_CIPHER) 610 return 0; 611 if (EVP_CIPHER_mode(*enc) == EVP_CIPH_GCM_MODE) 612 return 0; 613 614 return 1; 615 } 616 617 /* 618 * ssl_cipher_get_evp_aead sets aead to point to the correct EVP_AEAD object 619 * for s->cipher. It returns 1 on success and 0 on error. 620 */ 621 int 622 ssl_cipher_get_evp_aead(const SSL_SESSION *s, const EVP_AEAD **aead) 623 { 624 const SSL_CIPHER *c = s->cipher; 625 626 *aead = NULL; 627 628 if (c == NULL) 629 return 0; 630 if ((c->algorithm_mac & SSL_AEAD) == 0) 631 return 0; 632 633 switch (c->algorithm_enc) { 634 case SSL_AES128GCM: 635 *aead = EVP_aead_aes_128_gcm(); 636 return 1; 637 case SSL_AES256GCM: 638 *aead = EVP_aead_aes_256_gcm(); 639 return 1; 640 case SSL_CHACHA20POLY1305: 641 *aead = EVP_aead_chacha20_poly1305(); 642 return 1; 643 default: 644 break; 645 } 646 return 0; 647 } 648 649 int 650 ssl_get_handshake_evp_md(SSL *s, const EVP_MD **md) 651 { 652 *md = NULL; 653 654 switch (ssl_get_algorithm2(s) & SSL_HANDSHAKE_MAC_MASK) { 655 case SSL_HANDSHAKE_MAC_DEFAULT: 656 *md = EVP_md5_sha1(); 657 return 1; 658 case SSL_HANDSHAKE_MAC_GOST94: 659 *md = EVP_gostr341194(); 660 return 1; 661 case SSL_HANDSHAKE_MAC_SHA256: 662 *md = EVP_sha256(); 663 return 1; 664 case SSL_HANDSHAKE_MAC_SHA384: 665 *md = EVP_sha384(); 666 return 1; 667 case SSL_HANDSHAKE_MAC_STREEBOG256: 668 *md = EVP_streebog256(); 669 return 1; 670 default: 671 break; 672 } 673 674 return 0; 675 } 676 677 #define ITEM_SEP(a) \ 678 (((a) == ':') || ((a) == ' ') || ((a) == ';') || ((a) == ',')) 679 680 static void 681 ll_append_tail(CIPHER_ORDER **head, CIPHER_ORDER *curr, 682 CIPHER_ORDER **tail) 683 { 684 if (curr == *tail) 685 return; 686 if (curr == *head) 687 *head = curr->next; 688 if (curr->prev != NULL) 689 curr->prev->next = curr->next; 690 if (curr->next != NULL) 691 curr->next->prev = curr->prev; 692 (*tail)->next = curr; 693 curr->prev= *tail; 694 curr->next = NULL; 695 *tail = curr; 696 } 697 698 static void 699 ll_append_head(CIPHER_ORDER **head, CIPHER_ORDER *curr, 700 CIPHER_ORDER **tail) 701 { 702 if (curr == *head) 703 return; 704 if (curr == *tail) 705 *tail = curr->prev; 706 if (curr->next != NULL) 707 curr->next->prev = curr->prev; 708 if (curr->prev != NULL) 709 curr->prev->next = curr->next; 710 (*head)->prev = curr; 711 curr->next= *head; 712 curr->prev = NULL; 713 *head = curr; 714 } 715 716 static void 717 ssl_cipher_get_disabled(unsigned long *mkey, unsigned long *auth, 718 unsigned long *enc, unsigned long *mac, unsigned long *ssl) 719 { 720 *mkey = 0; 721 *auth = 0; 722 *enc = 0; 723 *mac = 0; 724 *ssl = 0; 725 726 /* 727 * Check for the availability of GOST 34.10 public/private key 728 * algorithms. If they are not available disable the associated 729 * authentication and key exchange algorithms. 730 */ 731 if (EVP_PKEY_meth_find(NID_id_GostR3410_2001) == NULL) { 732 *auth |= SSL_aGOST01; 733 *mkey |= SSL_kGOST; 734 } 735 736 #ifdef SSL_FORBID_ENULL 737 *enc |= SSL_eNULL; 738 #endif 739 740 *enc |= (ssl_cipher_methods[SSL_ENC_3DES_IDX] == NULL) ? SSL_3DES : 0; 741 *enc |= (ssl_cipher_methods[SSL_ENC_RC4_IDX ] == NULL) ? SSL_RC4 : 0; 742 *enc |= (ssl_cipher_methods[SSL_ENC_AES128_IDX] == NULL) ? SSL_AES128 : 0; 743 *enc |= (ssl_cipher_methods[SSL_ENC_AES256_IDX] == NULL) ? SSL_AES256 : 0; 744 *enc |= (ssl_cipher_methods[SSL_ENC_CAMELLIA128_IDX] == NULL) ? SSL_CAMELLIA128 : 0; 745 *enc |= (ssl_cipher_methods[SSL_ENC_CAMELLIA256_IDX] == NULL) ? SSL_CAMELLIA256 : 0; 746 *enc |= (ssl_cipher_methods[SSL_ENC_GOST89_IDX] == NULL) ? SSL_eGOST2814789CNT : 0; 747 748 *mac |= (ssl_digest_methods[SSL_MD_MD5_IDX ] == NULL) ? SSL_MD5 : 0; 749 *mac |= (ssl_digest_methods[SSL_MD_SHA1_IDX] == NULL) ? SSL_SHA1 : 0; 750 *mac |= (ssl_digest_methods[SSL_MD_SHA256_IDX] == NULL) ? SSL_SHA256 : 0; 751 *mac |= (ssl_digest_methods[SSL_MD_SHA384_IDX] == NULL) ? SSL_SHA384 : 0; 752 *mac |= (ssl_digest_methods[SSL_MD_GOST94_IDX] == NULL) ? SSL_GOST94 : 0; 753 *mac |= (ssl_digest_methods[SSL_MD_GOST89MAC_IDX] == NULL) ? SSL_GOST89MAC : 0; 754 *mac |= (ssl_digest_methods[SSL_MD_STREEBOG256_IDX] == NULL) ? SSL_STREEBOG256 : 0; 755 } 756 757 static void 758 ssl_cipher_collect_ciphers(const SSL_METHOD *ssl_method, int num_of_ciphers, 759 unsigned long disabled_mkey, unsigned long disabled_auth, 760 unsigned long disabled_enc, unsigned long disabled_mac, 761 unsigned long disabled_ssl, CIPHER_ORDER *co_list, 762 CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p) 763 { 764 int i, co_list_num; 765 const SSL_CIPHER *c; 766 767 /* 768 * We have num_of_ciphers descriptions compiled in, depending on the 769 * method selected (SSLv3, TLSv1, etc). These will later be sorted in 770 * a linked list with at most num entries. 771 */ 772 773 /* Get the initial list of ciphers */ 774 co_list_num = 0; /* actual count of ciphers */ 775 for (i = 0; i < num_of_ciphers; i++) { 776 c = ssl_method->get_cipher(i); 777 /* drop those that use any of that is not available */ 778 if ((c != NULL) && c->valid && 779 !(c->algorithm_mkey & disabled_mkey) && 780 !(c->algorithm_auth & disabled_auth) && 781 !(c->algorithm_enc & disabled_enc) && 782 !(c->algorithm_mac & disabled_mac) && 783 !(c->algorithm_ssl & disabled_ssl)) { 784 co_list[co_list_num].cipher = c; 785 co_list[co_list_num].next = NULL; 786 co_list[co_list_num].prev = NULL; 787 co_list[co_list_num].active = 0; 788 co_list_num++; 789 /* 790 if (!sk_push(ca_list,(char *)c)) goto err; 791 */ 792 } 793 } 794 795 /* 796 * Prepare linked list from list entries 797 */ 798 if (co_list_num > 0) { 799 co_list[0].prev = NULL; 800 801 if (co_list_num > 1) { 802 co_list[0].next = &co_list[1]; 803 804 for (i = 1; i < co_list_num - 1; i++) { 805 co_list[i].prev = &co_list[i - 1]; 806 co_list[i].next = &co_list[i + 1]; 807 } 808 809 co_list[co_list_num - 1].prev = 810 &co_list[co_list_num - 2]; 811 } 812 813 co_list[co_list_num - 1].next = NULL; 814 815 *head_p = &co_list[0]; 816 *tail_p = &co_list[co_list_num - 1]; 817 } 818 } 819 820 static void 821 ssl_cipher_collect_aliases(const SSL_CIPHER **ca_list, int num_of_group_aliases, 822 unsigned long disabled_mkey, unsigned long disabled_auth, 823 unsigned long disabled_enc, unsigned long disabled_mac, 824 unsigned long disabled_ssl, CIPHER_ORDER *head) 825 { 826 CIPHER_ORDER *ciph_curr; 827 const SSL_CIPHER **ca_curr; 828 int i; 829 unsigned long mask_mkey = ~disabled_mkey; 830 unsigned long mask_auth = ~disabled_auth; 831 unsigned long mask_enc = ~disabled_enc; 832 unsigned long mask_mac = ~disabled_mac; 833 unsigned long mask_ssl = ~disabled_ssl; 834 835 /* 836 * First, add the real ciphers as already collected 837 */ 838 ciph_curr = head; 839 ca_curr = ca_list; 840 while (ciph_curr != NULL) { 841 *ca_curr = ciph_curr->cipher; 842 ca_curr++; 843 ciph_curr = ciph_curr->next; 844 } 845 846 /* 847 * Now we add the available ones from the cipher_aliases[] table. 848 * They represent either one or more algorithms, some of which 849 * in any affected category must be supported (set in enabled_mask), 850 * or represent a cipher strength value (will be added in any case because algorithms=0). 851 */ 852 for (i = 0; i < num_of_group_aliases; i++) { 853 unsigned long algorithm_mkey = cipher_aliases[i].algorithm_mkey; 854 unsigned long algorithm_auth = cipher_aliases[i].algorithm_auth; 855 unsigned long algorithm_enc = cipher_aliases[i].algorithm_enc; 856 unsigned long algorithm_mac = cipher_aliases[i].algorithm_mac; 857 unsigned long algorithm_ssl = cipher_aliases[i].algorithm_ssl; 858 859 if (algorithm_mkey) 860 if ((algorithm_mkey & mask_mkey) == 0) 861 continue; 862 863 if (algorithm_auth) 864 if ((algorithm_auth & mask_auth) == 0) 865 continue; 866 867 if (algorithm_enc) 868 if ((algorithm_enc & mask_enc) == 0) 869 continue; 870 871 if (algorithm_mac) 872 if ((algorithm_mac & mask_mac) == 0) 873 continue; 874 875 if (algorithm_ssl) 876 if ((algorithm_ssl & mask_ssl) == 0) 877 continue; 878 879 *ca_curr = (SSL_CIPHER *)(cipher_aliases + i); 880 ca_curr++; 881 } 882 883 *ca_curr = NULL; /* end of list */ 884 } 885 886 static void 887 ssl_cipher_apply_rule(unsigned long cipher_id, unsigned long alg_mkey, 888 unsigned long alg_auth, unsigned long alg_enc, unsigned long alg_mac, 889 unsigned long alg_ssl, unsigned long algo_strength, 890 int rule, int strength_bits, CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p) 891 { 892 CIPHER_ORDER *head, *tail, *curr, *next, *last; 893 const SSL_CIPHER *cp; 894 int reverse = 0; 895 896 897 if (rule == CIPHER_DEL) 898 reverse = 1; /* needed to maintain sorting between currently deleted ciphers */ 899 900 head = *head_p; 901 tail = *tail_p; 902 903 if (reverse) { 904 next = tail; 905 last = head; 906 } else { 907 next = head; 908 last = tail; 909 } 910 911 curr = NULL; 912 for (;;) { 913 if (curr == last) 914 break; 915 curr = next; 916 next = reverse ? curr->prev : curr->next; 917 918 cp = curr->cipher; 919 920 /* 921 * Selection criteria is either the value of strength_bits 922 * or the algorithms used. 923 */ 924 if (strength_bits >= 0) { 925 if (strength_bits != cp->strength_bits) 926 continue; 927 } else { 928 929 if (alg_mkey && !(alg_mkey & cp->algorithm_mkey)) 930 continue; 931 if (alg_auth && !(alg_auth & cp->algorithm_auth)) 932 continue; 933 if (alg_enc && !(alg_enc & cp->algorithm_enc)) 934 continue; 935 if (alg_mac && !(alg_mac & cp->algorithm_mac)) 936 continue; 937 if (alg_ssl && !(alg_ssl & cp->algorithm_ssl)) 938 continue; 939 if ((algo_strength & SSL_STRONG_MASK) && !(algo_strength & SSL_STRONG_MASK & cp->algo_strength)) 940 continue; 941 } 942 943 944 /* add the cipher if it has not been added yet. */ 945 if (rule == CIPHER_ADD) { 946 /* reverse == 0 */ 947 if (!curr->active) { 948 ll_append_tail(&head, curr, &tail); 949 curr->active = 1; 950 } 951 } 952 /* Move the added cipher to this location */ 953 else if (rule == CIPHER_ORD) { 954 /* reverse == 0 */ 955 if (curr->active) { 956 ll_append_tail(&head, curr, &tail); 957 } 958 } else if (rule == CIPHER_DEL) { 959 /* reverse == 1 */ 960 if (curr->active) { 961 /* most recently deleted ciphersuites get best positions 962 * for any future CIPHER_ADD (note that the CIPHER_DEL loop 963 * works in reverse to maintain the order) */ 964 ll_append_head(&head, curr, &tail); 965 curr->active = 0; 966 } 967 } else if (rule == CIPHER_KILL) { 968 /* reverse == 0 */ 969 if (head == curr) 970 head = curr->next; 971 else 972 curr->prev->next = curr->next; 973 if (tail == curr) 974 tail = curr->prev; 975 curr->active = 0; 976 if (curr->next != NULL) 977 curr->next->prev = curr->prev; 978 if (curr->prev != NULL) 979 curr->prev->next = curr->next; 980 curr->next = NULL; 981 curr->prev = NULL; 982 } 983 } 984 985 *head_p = head; 986 *tail_p = tail; 987 } 988 989 static int 990 ssl_cipher_strength_sort(CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p) 991 { 992 int max_strength_bits, i, *number_uses; 993 CIPHER_ORDER *curr; 994 995 /* 996 * This routine sorts the ciphers with descending strength. The sorting 997 * must keep the pre-sorted sequence, so we apply the normal sorting 998 * routine as '+' movement to the end of the list. 999 */ 1000 max_strength_bits = 0; 1001 curr = *head_p; 1002 while (curr != NULL) { 1003 if (curr->active && 1004 (curr->cipher->strength_bits > max_strength_bits)) 1005 max_strength_bits = curr->cipher->strength_bits; 1006 curr = curr->next; 1007 } 1008 1009 number_uses = calloc((max_strength_bits + 1), sizeof(int)); 1010 if (!number_uses) { 1011 SSLerrorx(ERR_R_MALLOC_FAILURE); 1012 return (0); 1013 } 1014 1015 /* 1016 * Now find the strength_bits values actually used 1017 */ 1018 curr = *head_p; 1019 while (curr != NULL) { 1020 if (curr->active) 1021 number_uses[curr->cipher->strength_bits]++; 1022 curr = curr->next; 1023 } 1024 /* 1025 * Go through the list of used strength_bits values in descending 1026 * order. 1027 */ 1028 for (i = max_strength_bits; i >= 0; i--) 1029 if (number_uses[i] > 0) 1030 ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_ORD, i, head_p, tail_p); 1031 1032 free(number_uses); 1033 return (1); 1034 } 1035 1036 static int 1037 ssl_cipher_process_rulestr(const char *rule_str, CIPHER_ORDER **head_p, 1038 CIPHER_ORDER **tail_p, const SSL_CIPHER **ca_list) 1039 { 1040 unsigned long alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl; 1041 unsigned long algo_strength; 1042 int j, multi, found, rule, retval, ok, buflen; 1043 unsigned long cipher_id = 0; 1044 const char *l, *buf; 1045 char ch; 1046 1047 retval = 1; 1048 l = rule_str; 1049 for (;;) { 1050 ch = *l; 1051 1052 if (ch == '\0') 1053 break; 1054 1055 if (ch == '-') { 1056 rule = CIPHER_DEL; 1057 l++; 1058 } else if (ch == '+') { 1059 rule = CIPHER_ORD; 1060 l++; 1061 } else if (ch == '!') { 1062 rule = CIPHER_KILL; 1063 l++; 1064 } else if (ch == '@') { 1065 rule = CIPHER_SPECIAL; 1066 l++; 1067 } else { 1068 rule = CIPHER_ADD; 1069 } 1070 1071 if (ITEM_SEP(ch)) { 1072 l++; 1073 continue; 1074 } 1075 1076 alg_mkey = 0; 1077 alg_auth = 0; 1078 alg_enc = 0; 1079 alg_mac = 0; 1080 alg_ssl = 0; 1081 algo_strength = 0; 1082 1083 for (;;) { 1084 ch = *l; 1085 buf = l; 1086 buflen = 0; 1087 while (((ch >= 'A') && (ch <= 'Z')) || 1088 ((ch >= '0') && (ch <= '9')) || 1089 ((ch >= 'a') && (ch <= 'z')) || 1090 (ch == '-') || (ch == '.')) { 1091 ch = *(++l); 1092 buflen++; 1093 } 1094 1095 if (buflen == 0) { 1096 /* 1097 * We hit something we cannot deal with, 1098 * it is no command or separator nor 1099 * alphanumeric, so we call this an error. 1100 */ 1101 SSLerrorx(SSL_R_INVALID_COMMAND); 1102 retval = found = 0; 1103 l++; 1104 break; 1105 } 1106 1107 if (rule == CIPHER_SPECIAL) { 1108 /* unused -- avoid compiler warning */ 1109 found = 0; 1110 /* special treatment */ 1111 break; 1112 } 1113 1114 /* check for multi-part specification */ 1115 if (ch == '+') { 1116 multi = 1; 1117 l++; 1118 } else 1119 multi = 0; 1120 1121 /* 1122 * Now search for the cipher alias in the ca_list. 1123 * Be careful with the strncmp, because the "buflen" 1124 * limitation will make the rule "ADH:SOME" and the 1125 * cipher "ADH-MY-CIPHER" look like a match for 1126 * buflen=3. So additionally check whether the cipher 1127 * name found has the correct length. We can save a 1128 * strlen() call: just checking for the '\0' at the 1129 * right place is sufficient, we have to strncmp() 1130 * anyway (we cannot use strcmp(), because buf is not 1131 * '\0' terminated.) 1132 */ 1133 j = found = 0; 1134 cipher_id = 0; 1135 while (ca_list[j]) { 1136 if (!strncmp(buf, ca_list[j]->name, buflen) && 1137 (ca_list[j]->name[buflen] == '\0')) { 1138 found = 1; 1139 break; 1140 } else 1141 j++; 1142 } 1143 1144 if (!found) 1145 break; /* ignore this entry */ 1146 1147 if (ca_list[j]->algorithm_mkey) { 1148 if (alg_mkey) { 1149 alg_mkey &= ca_list[j]->algorithm_mkey; 1150 if (!alg_mkey) { 1151 found = 0; 1152 break; 1153 } 1154 } else 1155 alg_mkey = ca_list[j]->algorithm_mkey; 1156 } 1157 1158 if (ca_list[j]->algorithm_auth) { 1159 if (alg_auth) { 1160 alg_auth &= ca_list[j]->algorithm_auth; 1161 if (!alg_auth) { 1162 found = 0; 1163 break; 1164 } 1165 } else 1166 alg_auth = ca_list[j]->algorithm_auth; 1167 } 1168 1169 if (ca_list[j]->algorithm_enc) { 1170 if (alg_enc) { 1171 alg_enc &= ca_list[j]->algorithm_enc; 1172 if (!alg_enc) { 1173 found = 0; 1174 break; 1175 } 1176 } else 1177 alg_enc = ca_list[j]->algorithm_enc; 1178 } 1179 1180 if (ca_list[j]->algorithm_mac) { 1181 if (alg_mac) { 1182 alg_mac &= ca_list[j]->algorithm_mac; 1183 if (!alg_mac) { 1184 found = 0; 1185 break; 1186 } 1187 } else 1188 alg_mac = ca_list[j]->algorithm_mac; 1189 } 1190 1191 if (ca_list[j]->algo_strength & SSL_STRONG_MASK) { 1192 if (algo_strength & SSL_STRONG_MASK) { 1193 algo_strength &= 1194 (ca_list[j]->algo_strength & 1195 SSL_STRONG_MASK) | ~SSL_STRONG_MASK; 1196 if (!(algo_strength & 1197 SSL_STRONG_MASK)) { 1198 found = 0; 1199 break; 1200 } 1201 } else 1202 algo_strength |= 1203 ca_list[j]->algo_strength & 1204 SSL_STRONG_MASK; 1205 } 1206 1207 if (ca_list[j]->valid) { 1208 /* 1209 * explicit ciphersuite found; its protocol 1210 * version does not become part of the search 1211 * pattern! 1212 */ 1213 cipher_id = ca_list[j]->id; 1214 } else { 1215 /* 1216 * not an explicit ciphersuite; only in this 1217 * case, the protocol version is considered 1218 * part of the search pattern 1219 */ 1220 if (ca_list[j]->algorithm_ssl) { 1221 if (alg_ssl) { 1222 alg_ssl &= 1223 ca_list[j]->algorithm_ssl; 1224 if (!alg_ssl) { 1225 found = 0; 1226 break; 1227 } 1228 } else 1229 alg_ssl = 1230 ca_list[j]->algorithm_ssl; 1231 } 1232 } 1233 1234 if (!multi) 1235 break; 1236 } 1237 1238 /* 1239 * Ok, we have the rule, now apply it 1240 */ 1241 if (rule == CIPHER_SPECIAL) { 1242 /* special command */ 1243 ok = 0; 1244 if ((buflen == 8) && !strncmp(buf, "STRENGTH", 8)) 1245 ok = ssl_cipher_strength_sort(head_p, tail_p); 1246 else 1247 SSLerrorx(SSL_R_INVALID_COMMAND); 1248 if (ok == 0) 1249 retval = 0; 1250 /* 1251 * We do not support any "multi" options 1252 * together with "@", so throw away the 1253 * rest of the command, if any left, until 1254 * end or ':' is found. 1255 */ 1256 while ((*l != '\0') && !ITEM_SEP(*l)) 1257 l++; 1258 } else if (found) { 1259 ssl_cipher_apply_rule(cipher_id, alg_mkey, alg_auth, 1260 alg_enc, alg_mac, alg_ssl, algo_strength, rule, 1261 -1, head_p, tail_p); 1262 } else { 1263 while ((*l != '\0') && !ITEM_SEP(*l)) 1264 l++; 1265 } 1266 if (*l == '\0') 1267 break; /* done */ 1268 } 1269 1270 return (retval); 1271 } 1272 1273 static inline int 1274 ssl_aes_is_accelerated(void) 1275 { 1276 #if defined(__i386__) || defined(__x86_64__) 1277 return ((OPENSSL_cpu_caps() & (1ULL << 57)) != 0); 1278 #else 1279 return (0); 1280 #endif 1281 } 1282 1283 STACK_OF(SSL_CIPHER) * 1284 ssl_create_cipher_list(const SSL_METHOD *ssl_method, 1285 STACK_OF(SSL_CIPHER) **cipher_list, 1286 STACK_OF(SSL_CIPHER) **cipher_list_by_id, 1287 const char *rule_str) 1288 { 1289 int ok, num_of_ciphers, num_of_alias_max, num_of_group_aliases; 1290 unsigned long disabled_mkey, disabled_auth, disabled_enc, disabled_mac, disabled_ssl; 1291 STACK_OF(SSL_CIPHER) *cipherstack, *tmp_cipher_list; 1292 const char *rule_p; 1293 CIPHER_ORDER *co_list = NULL, *head = NULL, *tail = NULL, *curr; 1294 const SSL_CIPHER **ca_list = NULL; 1295 1296 /* 1297 * Return with error if nothing to do. 1298 */ 1299 if (rule_str == NULL || cipher_list == NULL || cipher_list_by_id == NULL) 1300 return NULL; 1301 1302 /* 1303 * To reduce the work to do we only want to process the compiled 1304 * in algorithms, so we first get the mask of disabled ciphers. 1305 */ 1306 ssl_cipher_get_disabled(&disabled_mkey, &disabled_auth, &disabled_enc, &disabled_mac, &disabled_ssl); 1307 1308 /* 1309 * Now we have to collect the available ciphers from the compiled 1310 * in ciphers. We cannot get more than the number compiled in, so 1311 * it is used for allocation. 1312 */ 1313 num_of_ciphers = ssl_method->num_ciphers(); 1314 co_list = reallocarray(NULL, num_of_ciphers, sizeof(CIPHER_ORDER)); 1315 if (co_list == NULL) { 1316 SSLerrorx(ERR_R_MALLOC_FAILURE); 1317 return(NULL); /* Failure */ 1318 } 1319 1320 ssl_cipher_collect_ciphers(ssl_method, num_of_ciphers, 1321 disabled_mkey, disabled_auth, disabled_enc, disabled_mac, disabled_ssl, 1322 co_list, &head, &tail); 1323 1324 1325 /* Now arrange all ciphers by preference: */ 1326 1327 /* Everything else being equal, prefer ephemeral ECDH over other key exchange mechanisms */ 1328 ssl_cipher_apply_rule(0, SSL_kECDHE, 0, 0, 0, 0, 0, CIPHER_ADD, -1, &head, &tail); 1329 ssl_cipher_apply_rule(0, SSL_kECDHE, 0, 0, 0, 0, 0, CIPHER_DEL, -1, &head, &tail); 1330 1331 if (ssl_aes_is_accelerated() == 1) { 1332 /* 1333 * We have hardware assisted AES - prefer AES as a symmetric 1334 * cipher, with CHACHA20 second. 1335 */ 1336 ssl_cipher_apply_rule(0, 0, 0, SSL_AES, 0, 0, 0, 1337 CIPHER_ADD, -1, &head, &tail); 1338 ssl_cipher_apply_rule(0, 0, 0, SSL_CHACHA20POLY1305, 1339 0, 0, 0, CIPHER_ADD, -1, &head, &tail); 1340 } else { 1341 /* 1342 * CHACHA20 is fast and safe on all hardware and is thus our 1343 * preferred symmetric cipher, with AES second. 1344 */ 1345 ssl_cipher_apply_rule(0, 0, 0, SSL_CHACHA20POLY1305, 1346 0, 0, 0, CIPHER_ADD, -1, &head, &tail); 1347 ssl_cipher_apply_rule(0, 0, 0, SSL_AES, 0, 0, 0, 1348 CIPHER_ADD, -1, &head, &tail); 1349 } 1350 1351 /* Temporarily enable everything else for sorting */ 1352 ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_ADD, -1, &head, &tail); 1353 1354 /* Low priority for MD5 */ 1355 ssl_cipher_apply_rule(0, 0, 0, 0, SSL_MD5, 0, 0, CIPHER_ORD, -1, &head, &tail); 1356 1357 /* Move anonymous ciphers to the end. Usually, these will remain disabled. 1358 * (For applications that allow them, they aren't too bad, but we prefer 1359 * authenticated ciphers.) */ 1360 ssl_cipher_apply_rule(0, 0, SSL_aNULL, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail); 1361 1362 /* Move ciphers without forward secrecy to the end */ 1363 ssl_cipher_apply_rule(0, SSL_kRSA, 0, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail); 1364 1365 /* RC4 is sort of broken - move it to the end */ 1366 ssl_cipher_apply_rule(0, 0, 0, SSL_RC4, 0, 0, 0, CIPHER_ORD, -1, &head, &tail); 1367 1368 /* Now sort by symmetric encryption strength. The above ordering remains 1369 * in force within each class */ 1370 if (!ssl_cipher_strength_sort(&head, &tail)) { 1371 free(co_list); 1372 return NULL; 1373 } 1374 1375 /* Now disable everything (maintaining the ordering!) */ 1376 ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_DEL, -1, &head, &tail); 1377 1378 1379 /* 1380 * We also need cipher aliases for selecting based on the rule_str. 1381 * There might be two types of entries in the rule_str: 1) names 1382 * of ciphers themselves 2) aliases for groups of ciphers. 1383 * For 1) we need the available ciphers and for 2) the cipher 1384 * groups of cipher_aliases added together in one list (otherwise 1385 * we would be happy with just the cipher_aliases table). 1386 */ 1387 num_of_group_aliases = sizeof(cipher_aliases) / sizeof(SSL_CIPHER); 1388 num_of_alias_max = num_of_ciphers + num_of_group_aliases + 1; 1389 ca_list = reallocarray(NULL, num_of_alias_max, sizeof(SSL_CIPHER *)); 1390 if (ca_list == NULL) { 1391 free(co_list); 1392 SSLerrorx(ERR_R_MALLOC_FAILURE); 1393 return(NULL); /* Failure */ 1394 } 1395 ssl_cipher_collect_aliases(ca_list, num_of_group_aliases, 1396 disabled_mkey, disabled_auth, disabled_enc, 1397 disabled_mac, disabled_ssl, head); 1398 1399 /* 1400 * If the rule_string begins with DEFAULT, apply the default rule 1401 * before using the (possibly available) additional rules. 1402 */ 1403 ok = 1; 1404 rule_p = rule_str; 1405 if (strncmp(rule_str, "DEFAULT", 7) == 0) { 1406 ok = ssl_cipher_process_rulestr(SSL_DEFAULT_CIPHER_LIST, 1407 &head, &tail, ca_list); 1408 rule_p += 7; 1409 if (*rule_p == ':') 1410 rule_p++; 1411 } 1412 1413 if (ok && (strlen(rule_p) > 0)) 1414 ok = ssl_cipher_process_rulestr(rule_p, &head, &tail, ca_list); 1415 1416 free((void *)ca_list); /* Not needed anymore */ 1417 1418 if (!ok) { 1419 /* Rule processing failure */ 1420 free(co_list); 1421 return (NULL); 1422 } 1423 1424 /* 1425 * Allocate new "cipherstack" for the result, return with error 1426 * if we cannot get one. 1427 */ 1428 if ((cipherstack = sk_SSL_CIPHER_new_null()) == NULL) { 1429 free(co_list); 1430 return (NULL); 1431 } 1432 1433 /* 1434 * The cipher selection for the list is done. The ciphers are added 1435 * to the resulting precedence to the STACK_OF(SSL_CIPHER). 1436 */ 1437 for (curr = head; curr != NULL; curr = curr->next) { 1438 if (curr->active) { 1439 sk_SSL_CIPHER_push(cipherstack, curr->cipher); 1440 } 1441 } 1442 free(co_list); /* Not needed any longer */ 1443 1444 tmp_cipher_list = sk_SSL_CIPHER_dup(cipherstack); 1445 if (tmp_cipher_list == NULL) { 1446 sk_SSL_CIPHER_free(cipherstack); 1447 return NULL; 1448 } 1449 sk_SSL_CIPHER_free(*cipher_list); 1450 *cipher_list = cipherstack; 1451 sk_SSL_CIPHER_free(*cipher_list_by_id); 1452 *cipher_list_by_id = tmp_cipher_list; 1453 (void)sk_SSL_CIPHER_set_cmp_func(*cipher_list_by_id, 1454 ssl_cipher_ptr_id_cmp); 1455 1456 sk_SSL_CIPHER_sort(*cipher_list_by_id); 1457 return (cipherstack); 1458 } 1459 1460 const SSL_CIPHER * 1461 SSL_CIPHER_get_by_id(unsigned int id) 1462 { 1463 return ssl3_get_cipher_by_id(id); 1464 } 1465 1466 const SSL_CIPHER * 1467 SSL_CIPHER_get_by_value(uint16_t value) 1468 { 1469 return ssl3_get_cipher_by_value(value); 1470 } 1471 1472 char * 1473 SSL_CIPHER_description(const SSL_CIPHER *cipher, char *buf, int len) 1474 { 1475 unsigned long alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl, alg2; 1476 const char *ver, *kx, *au, *enc, *mac; 1477 char *ret; 1478 int l; 1479 1480 alg_mkey = cipher->algorithm_mkey; 1481 alg_auth = cipher->algorithm_auth; 1482 alg_enc = cipher->algorithm_enc; 1483 alg_mac = cipher->algorithm_mac; 1484 alg_ssl = cipher->algorithm_ssl; 1485 1486 alg2 = cipher->algorithm2; 1487 1488 if (alg_ssl & SSL_SSLV3) 1489 ver = "SSLv3"; 1490 else if (alg_ssl & SSL_TLSV1_2) 1491 ver = "TLSv1.2"; 1492 else 1493 ver = "unknown"; 1494 1495 switch (alg_mkey) { 1496 case SSL_kRSA: 1497 kx = "RSA"; 1498 break; 1499 case SSL_kDHE: 1500 kx = "DH"; 1501 break; 1502 case SSL_kECDHE: 1503 kx = "ECDH"; 1504 break; 1505 case SSL_kGOST: 1506 kx = "GOST"; 1507 break; 1508 default: 1509 kx = "unknown"; 1510 } 1511 1512 switch (alg_auth) { 1513 case SSL_aRSA: 1514 au = "RSA"; 1515 break; 1516 case SSL_aDSS: 1517 au = "DSS"; 1518 break; 1519 case SSL_aNULL: 1520 au = "None"; 1521 break; 1522 case SSL_aECDSA: 1523 au = "ECDSA"; 1524 break; 1525 case SSL_aGOST01: 1526 au = "GOST01"; 1527 break; 1528 default: 1529 au = "unknown"; 1530 break; 1531 } 1532 1533 switch (alg_enc) { 1534 case SSL_3DES: 1535 enc = "3DES(168)"; 1536 break; 1537 case SSL_RC4: 1538 enc = alg2 & SSL2_CF_8_BYTE_ENC ? "RC4(64)" : "RC4(128)"; 1539 break; 1540 case SSL_eNULL: 1541 enc = "None"; 1542 break; 1543 case SSL_AES128: 1544 enc = "AES(128)"; 1545 break; 1546 case SSL_AES256: 1547 enc = "AES(256)"; 1548 break; 1549 case SSL_AES128GCM: 1550 enc = "AESGCM(128)"; 1551 break; 1552 case SSL_AES256GCM: 1553 enc = "AESGCM(256)"; 1554 break; 1555 case SSL_CAMELLIA128: 1556 enc = "Camellia(128)"; 1557 break; 1558 case SSL_CAMELLIA256: 1559 enc = "Camellia(256)"; 1560 break; 1561 case SSL_CHACHA20POLY1305: 1562 enc = "ChaCha20-Poly1305"; 1563 break; 1564 case SSL_eGOST2814789CNT: 1565 enc = "GOST-28178-89-CNT"; 1566 break; 1567 default: 1568 enc = "unknown"; 1569 break; 1570 } 1571 1572 switch (alg_mac) { 1573 case SSL_MD5: 1574 mac = "MD5"; 1575 break; 1576 case SSL_SHA1: 1577 mac = "SHA1"; 1578 break; 1579 case SSL_SHA256: 1580 mac = "SHA256"; 1581 break; 1582 case SSL_SHA384: 1583 mac = "SHA384"; 1584 break; 1585 case SSL_AEAD: 1586 mac = "AEAD"; 1587 break; 1588 case SSL_GOST94: 1589 mac = "GOST94"; 1590 break; 1591 case SSL_GOST89MAC: 1592 mac = "GOST89IMIT"; 1593 break; 1594 case SSL_STREEBOG256: 1595 mac = "STREEBOG256"; 1596 break; 1597 default: 1598 mac = "unknown"; 1599 break; 1600 } 1601 1602 if (asprintf(&ret, "%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s\n", 1603 cipher->name, ver, kx, au, enc, mac) == -1) 1604 return "OPENSSL_malloc Error"; 1605 1606 if (buf != NULL) { 1607 l = strlcpy(buf, ret, len); 1608 free(ret); 1609 ret = buf; 1610 if (l >= len) 1611 ret = "Buffer too small"; 1612 } 1613 1614 return (ret); 1615 } 1616 1617 const char * 1618 SSL_CIPHER_get_version(const SSL_CIPHER *c) 1619 { 1620 if (c == NULL) 1621 return("(NONE)"); 1622 if ((c->id >> 24) == 3) 1623 return("TLSv1/SSLv3"); 1624 else 1625 return("unknown"); 1626 } 1627 1628 /* return the actual cipher being used */ 1629 const char * 1630 SSL_CIPHER_get_name(const SSL_CIPHER *c) 1631 { 1632 if (c != NULL) 1633 return (c->name); 1634 return("(NONE)"); 1635 } 1636 1637 /* number of bits for symmetric cipher */ 1638 int 1639 SSL_CIPHER_get_bits(const SSL_CIPHER *c, int *alg_bits) 1640 { 1641 int ret = 0; 1642 1643 if (c != NULL) { 1644 if (alg_bits != NULL) 1645 *alg_bits = c->alg_bits; 1646 ret = c->strength_bits; 1647 } 1648 return (ret); 1649 } 1650 1651 unsigned long 1652 SSL_CIPHER_get_id(const SSL_CIPHER *c) 1653 { 1654 return c->id; 1655 } 1656 1657 uint16_t 1658 SSL_CIPHER_get_value(const SSL_CIPHER *c) 1659 { 1660 return ssl3_cipher_get_value(c); 1661 } 1662 1663 int 1664 SSL_CIPHER_get_cipher_nid(const SSL_CIPHER *c) 1665 { 1666 switch (c->algorithm_enc) { 1667 case SSL_eNULL: 1668 return NID_undef; 1669 case SSL_3DES: 1670 return NID_des_ede3_cbc; 1671 case SSL_AES128: 1672 return NID_aes_128_cbc; 1673 case SSL_AES128GCM: 1674 return NID_aes_128_gcm; 1675 case SSL_AES256: 1676 return NID_aes_256_cbc; 1677 case SSL_AES256GCM: 1678 return NID_aes_256_gcm; 1679 case SSL_CAMELLIA128: 1680 return NID_camellia_128_cbc; 1681 case SSL_CAMELLIA256: 1682 return NID_camellia_256_cbc; 1683 case SSL_CHACHA20POLY1305: 1684 return NID_chacha20_poly1305; 1685 case SSL_DES: 1686 return NID_des_cbc; 1687 case SSL_RC4: 1688 return NID_rc4; 1689 case SSL_eGOST2814789CNT: 1690 return NID_gost89_cnt; 1691 default: 1692 return NID_undef; 1693 } 1694 } 1695 1696 int 1697 SSL_CIPHER_get_digest_nid(const SSL_CIPHER *c) 1698 { 1699 switch (c->algorithm_mac) { 1700 case SSL_AEAD: 1701 return NID_undef; 1702 case SSL_GOST89MAC: 1703 return NID_id_Gost28147_89_MAC; 1704 case SSL_GOST94: 1705 return NID_id_GostR3411_94; 1706 case SSL_MD5: 1707 return NID_md5; 1708 case SSL_SHA1: 1709 return NID_sha1; 1710 case SSL_SHA256: 1711 return NID_sha256; 1712 case SSL_SHA384: 1713 return NID_sha384; 1714 case SSL_STREEBOG256: 1715 return NID_id_tc26_gost3411_2012_256; 1716 default: 1717 return NID_undef; 1718 } 1719 } 1720 1721 int 1722 SSL_CIPHER_get_kx_nid(const SSL_CIPHER *c) 1723 { 1724 switch (c->algorithm_mkey) { 1725 case SSL_kDHE: 1726 return NID_kx_dhe; 1727 case SSL_kECDHE: 1728 return NID_kx_ecdhe; 1729 case SSL_kGOST: 1730 return NID_kx_gost; 1731 case SSL_kRSA: 1732 return NID_kx_rsa; 1733 default: 1734 return NID_undef; 1735 } 1736 } 1737 1738 int 1739 SSL_CIPHER_get_auth_nid(const SSL_CIPHER *c) 1740 { 1741 switch (c->algorithm_auth) { 1742 case SSL_aNULL: 1743 return NID_auth_null; 1744 case SSL_aECDSA: 1745 return NID_auth_ecdsa; 1746 case SSL_aGOST01: 1747 return NID_auth_gost01; 1748 case SSL_aRSA: 1749 return NID_auth_rsa; 1750 default: 1751 return NID_undef; 1752 } 1753 } 1754 1755 int 1756 SSL_CIPHER_is_aead(const SSL_CIPHER *c) 1757 { 1758 return (c->algorithm_mac & SSL_AEAD) == SSL_AEAD; 1759 } 1760 1761 void * 1762 SSL_COMP_get_compression_methods(void) 1763 { 1764 return NULL; 1765 } 1766 1767 int 1768 SSL_COMP_add_compression_method(int id, void *cm) 1769 { 1770 return 1; 1771 } 1772 1773 const char * 1774 SSL_COMP_get_name(const void *comp) 1775 { 1776 return NULL; 1777 } 1778