ssl_ciph.c revision 325335
1/* ssl/ssl_ciph.c */ 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#include <openssl/objects.h> 145#ifndef OPENSSL_NO_COMP 146# include <openssl/comp.h> 147#endif 148#ifndef OPENSSL_NO_ENGINE 149# include <openssl/engine.h> 150#endif 151#include "ssl_locl.h" 152 153#define SSL_ENC_DES_IDX 0 154#define SSL_ENC_3DES_IDX 1 155#define SSL_ENC_RC4_IDX 2 156#define SSL_ENC_RC2_IDX 3 157#define SSL_ENC_IDEA_IDX 4 158#define SSL_ENC_NULL_IDX 5 159#define SSL_ENC_AES128_IDX 6 160#define SSL_ENC_AES256_IDX 7 161#define SSL_ENC_CAMELLIA128_IDX 8 162#define SSL_ENC_CAMELLIA256_IDX 9 163#define SSL_ENC_GOST89_IDX 10 164#define SSL_ENC_SEED_IDX 11 165#define SSL_ENC_AES128GCM_IDX 12 166#define SSL_ENC_AES256GCM_IDX 13 167#define SSL_ENC_NUM_IDX 14 168 169static const EVP_CIPHER *ssl_cipher_methods[SSL_ENC_NUM_IDX] = { 170 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, 171 NULL, NULL 172}; 173 174#define SSL_COMP_NULL_IDX 0 175#define SSL_COMP_ZLIB_IDX 1 176#define SSL_COMP_NUM_IDX 2 177 178static STACK_OF(SSL_COMP) *ssl_comp_methods = NULL; 179 180#define SSL_MD_MD5_IDX 0 181#define SSL_MD_SHA1_IDX 1 182#define SSL_MD_GOST94_IDX 2 183#define SSL_MD_GOST89MAC_IDX 3 184#define SSL_MD_SHA256_IDX 4 185#define SSL_MD_SHA384_IDX 5 186/* 187 * Constant SSL_MAX_DIGEST equal to size of digests array should be defined 188 * in the ssl_locl.h 189 */ 190#define SSL_MD_NUM_IDX SSL_MAX_DIGEST 191static const EVP_MD *ssl_digest_methods[SSL_MD_NUM_IDX] = { 192 NULL, NULL, NULL, NULL, NULL, NULL 193}; 194 195/* 196 * PKEY_TYPE for GOST89MAC is known in advance, but, because implementation 197 * is engine-provided, we'll fill it only if corresponding EVP_PKEY_METHOD is 198 * found 199 */ 200static int ssl_mac_pkey_id[SSL_MD_NUM_IDX] = { 201 EVP_PKEY_HMAC, EVP_PKEY_HMAC, EVP_PKEY_HMAC, NID_undef, 202 EVP_PKEY_HMAC, EVP_PKEY_HMAC 203}; 204 205static int ssl_mac_secret_size[SSL_MD_NUM_IDX] = { 206 0, 0, 0, 0, 0, 0 207}; 208 209static int ssl_handshake_digest_flag[SSL_MD_NUM_IDX] = { 210 SSL_HANDSHAKE_MAC_MD5, SSL_HANDSHAKE_MAC_SHA, 211 SSL_HANDSHAKE_MAC_GOST94, 0, SSL_HANDSHAKE_MAC_SHA256, 212 SSL_HANDSHAKE_MAC_SHA384 213}; 214 215#define CIPHER_ADD 1 216#define CIPHER_KILL 2 217#define CIPHER_DEL 3 218#define CIPHER_ORD 4 219#define CIPHER_SPECIAL 5 220 221typedef struct cipher_order_st { 222 const SSL_CIPHER *cipher; 223 int active; 224 int dead; 225 struct cipher_order_st *next, *prev; 226} CIPHER_ORDER; 227 228static const SSL_CIPHER cipher_aliases[] = { 229 /* "ALL" doesn't include eNULL (must be specifically enabled) */ 230 {0, SSL_TXT_ALL, 0, 0, 0, ~SSL_eNULL, 0, 0, 0, 0, 0, 0}, 231 /* "COMPLEMENTOFALL" */ 232 {0, SSL_TXT_CMPALL, 0, 0, 0, SSL_eNULL, 0, 0, 0, 0, 0, 0}, 233 234 /* 235 * "COMPLEMENTOFDEFAULT" (does *not* include ciphersuites not found in 236 * ALL!) 237 */ 238 {0, SSL_TXT_CMPDEF, 0, 0, 0, 0, 0, 0, SSL_NOT_DEFAULT, 0, 0, 0}, 239 240 /* 241 * key exchange aliases (some of those using only a single bit here 242 * combine multiple key exchange algs according to the RFCs, e.g. kEDH 243 * combines DHE_DSS and DHE_RSA) 244 */ 245 {0, SSL_TXT_kRSA, 0, SSL_kRSA, 0, 0, 0, 0, 0, 0, 0, 0}, 246 247 {0, SSL_TXT_kDHr, 0, SSL_kDHr, 0, 0, 0, 0, 0, 0, 0, 0}, 248 {0, SSL_TXT_kDHd, 0, SSL_kDHd, 0, 0, 0, 0, 0, 0, 0, 0}, 249 {0, SSL_TXT_kDH, 0, SSL_kDHr | SSL_kDHd, 0, 0, 0, 0, 0, 0, 0, 0}, 250 {0, SSL_TXT_kEDH, 0, SSL_kEDH, 0, 0, 0, 0, 0, 0, 0, 0}, 251 {0, SSL_TXT_kDHE, 0, SSL_kEDH, 0, 0, 0, 0, 0, 0, 0, 0}, 252 {0, SSL_TXT_DH, 0, SSL_kDHr | SSL_kDHd | SSL_kEDH, 0, 0, 0, 0, 0, 0, 0, 253 0}, 254 255 {0, SSL_TXT_kKRB5, 0, SSL_kKRB5, 0, 0, 0, 0, 0, 0, 0, 0}, 256 257 {0, SSL_TXT_kECDHr, 0, SSL_kECDHr, 0, 0, 0, 0, 0, 0, 0, 0}, 258 {0, SSL_TXT_kECDHe, 0, SSL_kECDHe, 0, 0, 0, 0, 0, 0, 0, 0}, 259 {0, SSL_TXT_kECDH, 0, SSL_kECDHr | SSL_kECDHe, 0, 0, 0, 0, 0, 0, 0, 0}, 260 {0, SSL_TXT_kEECDH, 0, SSL_kEECDH, 0, 0, 0, 0, 0, 0, 0, 0}, 261 {0, SSL_TXT_kECDHE, 0, SSL_kEECDH, 0, 0, 0, 0, 0, 0, 0, 0}, 262 {0, SSL_TXT_ECDH, 0, SSL_kECDHr | SSL_kECDHe | SSL_kEECDH, 0, 0, 0, 0, 0, 263 0, 0, 0}, 264 265 {0, SSL_TXT_kPSK, 0, SSL_kPSK, 0, 0, 0, 0, 0, 0, 0, 0}, 266 {0, SSL_TXT_kSRP, 0, SSL_kSRP, 0, 0, 0, 0, 0, 0, 0, 0}, 267 {0, SSL_TXT_kGOST, 0, SSL_kGOST, 0, 0, 0, 0, 0, 0, 0, 0}, 268 269 /* server authentication aliases */ 270 {0, SSL_TXT_aRSA, 0, 0, SSL_aRSA, 0, 0, 0, 0, 0, 0, 0}, 271 {0, SSL_TXT_aDSS, 0, 0, SSL_aDSS, 0, 0, 0, 0, 0, 0, 0}, 272 {0, SSL_TXT_DSS, 0, 0, SSL_aDSS, 0, 0, 0, 0, 0, 0, 0}, 273 {0, SSL_TXT_aKRB5, 0, 0, SSL_aKRB5, 0, 0, 0, 0, 0, 0, 0}, 274 {0, SSL_TXT_aNULL, 0, 0, SSL_aNULL, 0, 0, 0, 0, 0, 0, 0}, 275 /* no such ciphersuites supported! */ 276 {0, SSL_TXT_aDH, 0, 0, SSL_aDH, 0, 0, 0, 0, 0, 0, 0}, 277 {0, SSL_TXT_aECDH, 0, 0, SSL_aECDH, 0, 0, 0, 0, 0, 0, 0}, 278 {0, SSL_TXT_aECDSA, 0, 0, SSL_aECDSA, 0, 0, 0, 0, 0, 0, 0}, 279 {0, SSL_TXT_ECDSA, 0, 0, SSL_aECDSA, 0, 0, 0, 0, 0, 0, 0}, 280 {0, SSL_TXT_aPSK, 0, 0, SSL_aPSK, 0, 0, 0, 0, 0, 0, 0}, 281 {0, SSL_TXT_aGOST94, 0, 0, SSL_aGOST94, 0, 0, 0, 0, 0, 0, 0}, 282 {0, SSL_TXT_aGOST01, 0, 0, SSL_aGOST01, 0, 0, 0, 0, 0, 0, 0}, 283 {0, SSL_TXT_aGOST, 0, 0, SSL_aGOST94 | SSL_aGOST01, 0, 0, 0, 0, 0, 0, 0}, 284 {0, SSL_TXT_aSRP, 0, 0, SSL_aSRP, 0, 0, 0, 0, 0, 0, 0}, 285 286 /* aliases combining key exchange and server authentication */ 287 {0, SSL_TXT_EDH, 0, SSL_kEDH, ~SSL_aNULL, 0, 0, 0, 0, 0, 0, 0}, 288 {0, SSL_TXT_DHE, 0, SSL_kEDH, ~SSL_aNULL, 0, 0, 0, 0, 0, 0, 0}, 289 {0, SSL_TXT_EECDH, 0, SSL_kEECDH, ~SSL_aNULL, 0, 0, 0, 0, 0, 0, 0}, 290 {0, SSL_TXT_ECDHE, 0, SSL_kEECDH, ~SSL_aNULL, 0, 0, 0, 0, 0, 0, 0}, 291 {0, SSL_TXT_NULL, 0, 0, 0, SSL_eNULL, 0, 0, 0, 0, 0, 0}, 292 {0, SSL_TXT_KRB5, 0, SSL_kKRB5, SSL_aKRB5, 0, 0, 0, 0, 0, 0, 0}, 293 {0, SSL_TXT_RSA, 0, SSL_kRSA, SSL_aRSA, 0, 0, 0, 0, 0, 0, 0}, 294 {0, SSL_TXT_ADH, 0, SSL_kEDH, SSL_aNULL, 0, 0, 0, 0, 0, 0, 0}, 295 {0, SSL_TXT_AECDH, 0, SSL_kEECDH, SSL_aNULL, 0, 0, 0, 0, 0, 0, 0}, 296 {0, SSL_TXT_PSK, 0, SSL_kPSK, SSL_aPSK, 0, 0, 0, 0, 0, 0, 0}, 297 {0, SSL_TXT_SRP, 0, SSL_kSRP, 0, 0, 0, 0, 0, 0, 0, 0}, 298 299 /* symmetric encryption aliases */ 300 {0, SSL_TXT_DES, 0, 0, 0, SSL_DES, 0, 0, 0, 0, 0, 0}, 301 {0, SSL_TXT_3DES, 0, 0, 0, SSL_3DES, 0, 0, 0, 0, 0, 0}, 302 {0, SSL_TXT_RC4, 0, 0, 0, SSL_RC4, 0, 0, 0, 0, 0, 0}, 303 {0, SSL_TXT_RC2, 0, 0, 0, SSL_RC2, 0, 0, 0, 0, 0, 0}, 304 {0, SSL_TXT_IDEA, 0, 0, 0, SSL_IDEA, 0, 0, 0, 0, 0, 0}, 305 {0, SSL_TXT_SEED, 0, 0, 0, SSL_SEED, 0, 0, 0, 0, 0, 0}, 306 {0, SSL_TXT_eNULL, 0, 0, 0, SSL_eNULL, 0, 0, 0, 0, 0, 0}, 307 {0, SSL_TXT_AES128, 0, 0, 0, SSL_AES128 | SSL_AES128GCM, 0, 0, 0, 0, 0, 308 0}, 309 {0, SSL_TXT_AES256, 0, 0, 0, SSL_AES256 | SSL_AES256GCM, 0, 0, 0, 0, 0, 310 0}, 311 {0, SSL_TXT_AES, 0, 0, 0, SSL_AES, 0, 0, 0, 0, 0, 0}, 312 {0, SSL_TXT_AES_GCM, 0, 0, 0, SSL_AES128GCM | SSL_AES256GCM, 0, 0, 0, 0, 313 0, 0}, 314 {0, SSL_TXT_CAMELLIA128, 0, 0, 0, SSL_CAMELLIA128, 0, 0, 0, 0, 0, 0}, 315 {0, SSL_TXT_CAMELLIA256, 0, 0, 0, SSL_CAMELLIA256, 0, 0, 0, 0, 0, 0}, 316 {0, SSL_TXT_CAMELLIA, 0, 0, 0, SSL_CAMELLIA128 | SSL_CAMELLIA256, 0, 0, 0, 317 0, 0, 0}, 318 319 /* MAC aliases */ 320 {0, SSL_TXT_MD5, 0, 0, 0, 0, SSL_MD5, 0, 0, 0, 0, 0}, 321 {0, SSL_TXT_SHA1, 0, 0, 0, 0, SSL_SHA1, 0, 0, 0, 0, 0}, 322 {0, SSL_TXT_SHA, 0, 0, 0, 0, SSL_SHA1, 0, 0, 0, 0, 0}, 323 {0, SSL_TXT_GOST94, 0, 0, 0, 0, SSL_GOST94, 0, 0, 0, 0, 0}, 324 {0, SSL_TXT_GOST89MAC, 0, 0, 0, 0, SSL_GOST89MAC, 0, 0, 0, 0, 0}, 325 {0, SSL_TXT_SHA256, 0, 0, 0, 0, SSL_SHA256, 0, 0, 0, 0, 0}, 326 {0, SSL_TXT_SHA384, 0, 0, 0, 0, SSL_SHA384, 0, 0, 0, 0, 0}, 327 328 /* protocol version aliases */ 329 {0, SSL_TXT_SSLV2, 0, 0, 0, 0, 0, SSL_SSLV2, 0, 0, 0, 0}, 330 {0, SSL_TXT_SSLV3, 0, 0, 0, 0, 0, SSL_SSLV3, 0, 0, 0, 0}, 331 {0, SSL_TXT_TLSV1, 0, 0, 0, 0, 0, SSL_TLSV1, 0, 0, 0, 0}, 332 {0, SSL_TXT_TLSV1_2, 0, 0, 0, 0, 0, SSL_TLSV1_2, 0, 0, 0, 0}, 333 334 /* export flag */ 335 {0, SSL_TXT_EXP, 0, 0, 0, 0, 0, 0, SSL_EXPORT, 0, 0, 0}, 336 {0, SSL_TXT_EXPORT, 0, 0, 0, 0, 0, 0, SSL_EXPORT, 0, 0, 0}, 337 338 /* strength classes */ 339 {0, SSL_TXT_EXP40, 0, 0, 0, 0, 0, 0, SSL_EXP40, 0, 0, 0}, 340 {0, SSL_TXT_EXP56, 0, 0, 0, 0, 0, 0, SSL_EXP56, 0, 0, 0}, 341 {0, SSL_TXT_LOW, 0, 0, 0, 0, 0, 0, SSL_LOW, 0, 0, 0}, 342 {0, SSL_TXT_MEDIUM, 0, 0, 0, 0, 0, 0, SSL_MEDIUM, 0, 0, 0}, 343 {0, SSL_TXT_HIGH, 0, 0, 0, 0, 0, 0, SSL_HIGH, 0, 0, 0}, 344 /* FIPS 140-2 approved ciphersuite */ 345 {0, SSL_TXT_FIPS, 0, 0, 0, ~SSL_eNULL, 0, 0, SSL_FIPS, 0, 0, 0}, 346 /* "DHE-" aliases to "EDH-" labels (for forward compatibility) */ 347 {0, SSL3_TXT_DHE_DSS_DES_40_CBC_SHA, 0, 348 SSL_kDHE, SSL_aDSS, SSL_DES, SSL_SHA1, SSL_SSLV3, SSL_EXPORT | SSL_EXP40, 349 0, 0, 0,}, 350 {0, SSL3_TXT_DHE_DSS_DES_64_CBC_SHA, 0, 351 SSL_kDHE, SSL_aDSS, SSL_DES, SSL_SHA1, SSL_SSLV3, SSL_NOT_EXP | SSL_LOW, 352 0, 0, 0,}, 353 {0, SSL3_TXT_DHE_DSS_DES_192_CBC3_SHA, 0, 354 SSL_kDHE, SSL_aDSS, SSL_3DES, SSL_SHA1, SSL_SSLV3, 355 SSL_NOT_EXP | SSL_HIGH | SSL_FIPS, 0, 0, 0,}, 356 {0, SSL3_TXT_DHE_RSA_DES_40_CBC_SHA, 0, 357 SSL_kDHE, SSL_aRSA, SSL_DES, SSL_SHA1, SSL_SSLV3, SSL_EXPORT | SSL_EXP40, 358 0, 0, 0,}, 359 {0, SSL3_TXT_DHE_RSA_DES_64_CBC_SHA, 0, 360 SSL_kDHE, SSL_aRSA, SSL_DES, SSL_SHA1, SSL_SSLV3, SSL_NOT_EXP | SSL_LOW, 361 0, 0, 0,}, 362 {0, SSL3_TXT_DHE_RSA_DES_192_CBC3_SHA, 0, 363 SSL_kDHE, SSL_aRSA, SSL_3DES, SSL_SHA1, SSL_SSLV3, 364 SSL_NOT_EXP | SSL_HIGH | SSL_FIPS, 0, 0, 0,}, 365}; 366 367/* 368 * Search for public key algorithm with given name and return its pkey_id if 369 * it is available. Otherwise return 0 370 */ 371#ifdef OPENSSL_NO_ENGINE 372 373static int get_optional_pkey_id(const char *pkey_name) 374{ 375 const EVP_PKEY_ASN1_METHOD *ameth; 376 int pkey_id = 0; 377 ameth = EVP_PKEY_asn1_find_str(NULL, pkey_name, -1); 378 if (ameth && EVP_PKEY_asn1_get0_info(&pkey_id, NULL, NULL, NULL, NULL, 379 ameth) > 0) { 380 return pkey_id; 381 } 382 return 0; 383} 384 385#else 386 387static int get_optional_pkey_id(const char *pkey_name) 388{ 389 const EVP_PKEY_ASN1_METHOD *ameth; 390 ENGINE *tmpeng = NULL; 391 int pkey_id = 0; 392 ameth = EVP_PKEY_asn1_find_str(&tmpeng, pkey_name, -1); 393 if (ameth) { 394 if (EVP_PKEY_asn1_get0_info(&pkey_id, NULL, NULL, NULL, NULL, 395 ameth) <= 0) 396 pkey_id = 0; 397 } 398 if (tmpeng) 399 ENGINE_finish(tmpeng); 400 return pkey_id; 401} 402 403#endif 404 405void ssl_load_ciphers(void) 406{ 407 ssl_cipher_methods[SSL_ENC_DES_IDX] = EVP_get_cipherbyname(SN_des_cbc); 408 ssl_cipher_methods[SSL_ENC_3DES_IDX] = 409 EVP_get_cipherbyname(SN_des_ede3_cbc); 410 ssl_cipher_methods[SSL_ENC_RC4_IDX] = EVP_get_cipherbyname(SN_rc4); 411 ssl_cipher_methods[SSL_ENC_RC2_IDX] = EVP_get_cipherbyname(SN_rc2_cbc); 412#ifndef OPENSSL_NO_IDEA 413 ssl_cipher_methods[SSL_ENC_IDEA_IDX] = EVP_get_cipherbyname(SN_idea_cbc); 414#else 415 ssl_cipher_methods[SSL_ENC_IDEA_IDX] = NULL; 416#endif 417 ssl_cipher_methods[SSL_ENC_AES128_IDX] = 418 EVP_get_cipherbyname(SN_aes_128_cbc); 419 ssl_cipher_methods[SSL_ENC_AES256_IDX] = 420 EVP_get_cipherbyname(SN_aes_256_cbc); 421 ssl_cipher_methods[SSL_ENC_CAMELLIA128_IDX] = 422 EVP_get_cipherbyname(SN_camellia_128_cbc); 423 ssl_cipher_methods[SSL_ENC_CAMELLIA256_IDX] = 424 EVP_get_cipherbyname(SN_camellia_256_cbc); 425 ssl_cipher_methods[SSL_ENC_GOST89_IDX] = 426 EVP_get_cipherbyname(SN_gost89_cnt); 427 ssl_cipher_methods[SSL_ENC_SEED_IDX] = EVP_get_cipherbyname(SN_seed_cbc); 428 429 ssl_cipher_methods[SSL_ENC_AES128GCM_IDX] = 430 EVP_get_cipherbyname(SN_aes_128_gcm); 431 ssl_cipher_methods[SSL_ENC_AES256GCM_IDX] = 432 EVP_get_cipherbyname(SN_aes_256_gcm); 433 434 ssl_digest_methods[SSL_MD_MD5_IDX] = EVP_get_digestbyname(SN_md5); 435 ssl_mac_secret_size[SSL_MD_MD5_IDX] = 436 EVP_MD_size(ssl_digest_methods[SSL_MD_MD5_IDX]); 437 OPENSSL_assert(ssl_mac_secret_size[SSL_MD_MD5_IDX] >= 0); 438 ssl_digest_methods[SSL_MD_SHA1_IDX] = EVP_get_digestbyname(SN_sha1); 439 ssl_mac_secret_size[SSL_MD_SHA1_IDX] = 440 EVP_MD_size(ssl_digest_methods[SSL_MD_SHA1_IDX]); 441 OPENSSL_assert(ssl_mac_secret_size[SSL_MD_SHA1_IDX] >= 0); 442 ssl_digest_methods[SSL_MD_GOST94_IDX] = 443 EVP_get_digestbyname(SN_id_GostR3411_94); 444 if (ssl_digest_methods[SSL_MD_GOST94_IDX]) { 445 ssl_mac_secret_size[SSL_MD_GOST94_IDX] = 446 EVP_MD_size(ssl_digest_methods[SSL_MD_GOST94_IDX]); 447 OPENSSL_assert(ssl_mac_secret_size[SSL_MD_GOST94_IDX] >= 0); 448 } 449 ssl_digest_methods[SSL_MD_GOST89MAC_IDX] = 450 EVP_get_digestbyname(SN_id_Gost28147_89_MAC); 451 ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX] = get_optional_pkey_id("gost-mac"); 452 if (ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX]) { 453 ssl_mac_secret_size[SSL_MD_GOST89MAC_IDX] = 32; 454 } 455 456 ssl_digest_methods[SSL_MD_SHA256_IDX] = EVP_get_digestbyname(SN_sha256); 457 ssl_mac_secret_size[SSL_MD_SHA256_IDX] = 458 EVP_MD_size(ssl_digest_methods[SSL_MD_SHA256_IDX]); 459 ssl_digest_methods[SSL_MD_SHA384_IDX] = EVP_get_digestbyname(SN_sha384); 460 ssl_mac_secret_size[SSL_MD_SHA384_IDX] = 461 EVP_MD_size(ssl_digest_methods[SSL_MD_SHA384_IDX]); 462} 463 464#ifndef OPENSSL_NO_COMP 465 466static int sk_comp_cmp(const SSL_COMP *const *a, const SSL_COMP *const *b) 467{ 468 return ((*a)->id - (*b)->id); 469} 470 471static void load_builtin_compressions(void) 472{ 473 int got_write_lock = 0; 474 475 CRYPTO_r_lock(CRYPTO_LOCK_SSL); 476 if (ssl_comp_methods == NULL) { 477 CRYPTO_r_unlock(CRYPTO_LOCK_SSL); 478 CRYPTO_w_lock(CRYPTO_LOCK_SSL); 479 got_write_lock = 1; 480 481 if (ssl_comp_methods == NULL) { 482 SSL_COMP *comp = NULL; 483 484 MemCheck_off(); 485 ssl_comp_methods = sk_SSL_COMP_new(sk_comp_cmp); 486 if (ssl_comp_methods != NULL) { 487 comp = (SSL_COMP *)OPENSSL_malloc(sizeof(SSL_COMP)); 488 if (comp != NULL) { 489 comp->method = COMP_zlib(); 490 if (comp->method && comp->method->type == NID_undef) 491 OPENSSL_free(comp); 492 else { 493 comp->id = SSL_COMP_ZLIB_IDX; 494 comp->name = comp->method->name; 495 sk_SSL_COMP_push(ssl_comp_methods, comp); 496 } 497 } 498 sk_SSL_COMP_sort(ssl_comp_methods); 499 } 500 MemCheck_on(); 501 } 502 } 503 504 if (got_write_lock) 505 CRYPTO_w_unlock(CRYPTO_LOCK_SSL); 506 else 507 CRYPTO_r_unlock(CRYPTO_LOCK_SSL); 508} 509#endif 510 511int ssl_cipher_get_evp(const SSL_SESSION *s, const EVP_CIPHER **enc, 512 const EVP_MD **md, int *mac_pkey_type, 513 int *mac_secret_size, SSL_COMP **comp) 514{ 515 int i; 516 const SSL_CIPHER *c; 517 518 c = s->cipher; 519 if (c == NULL) 520 return (0); 521 if (comp != NULL) { 522 SSL_COMP ctmp; 523#ifndef OPENSSL_NO_COMP 524 load_builtin_compressions(); 525#endif 526 527 *comp = NULL; 528 ctmp.id = s->compress_meth; 529 if (ssl_comp_methods != NULL) { 530 i = sk_SSL_COMP_find(ssl_comp_methods, &ctmp); 531 if (i >= 0) 532 *comp = sk_SSL_COMP_value(ssl_comp_methods, i); 533 else 534 *comp = NULL; 535 } 536 } 537 538 if ((enc == NULL) || (md == NULL)) 539 return (0); 540 541 switch (c->algorithm_enc) { 542 case SSL_DES: 543 i = SSL_ENC_DES_IDX; 544 break; 545 case SSL_3DES: 546 i = SSL_ENC_3DES_IDX; 547 break; 548 case SSL_RC4: 549 i = SSL_ENC_RC4_IDX; 550 break; 551 case SSL_RC2: 552 i = SSL_ENC_RC2_IDX; 553 break; 554 case SSL_IDEA: 555 i = SSL_ENC_IDEA_IDX; 556 break; 557 case SSL_eNULL: 558 i = SSL_ENC_NULL_IDX; 559 break; 560 case SSL_AES128: 561 i = SSL_ENC_AES128_IDX; 562 break; 563 case SSL_AES256: 564 i = SSL_ENC_AES256_IDX; 565 break; 566 case SSL_CAMELLIA128: 567 i = SSL_ENC_CAMELLIA128_IDX; 568 break; 569 case SSL_CAMELLIA256: 570 i = SSL_ENC_CAMELLIA256_IDX; 571 break; 572 case SSL_eGOST2814789CNT: 573 i = SSL_ENC_GOST89_IDX; 574 break; 575 case SSL_SEED: 576 i = SSL_ENC_SEED_IDX; 577 break; 578 case SSL_AES128GCM: 579 i = SSL_ENC_AES128GCM_IDX; 580 break; 581 case SSL_AES256GCM: 582 i = SSL_ENC_AES256GCM_IDX; 583 break; 584 default: 585 i = -1; 586 break; 587 } 588 589 if ((i < 0) || (i >= SSL_ENC_NUM_IDX)) 590 *enc = NULL; 591 else { 592 if (i == SSL_ENC_NULL_IDX) 593 *enc = EVP_enc_null(); 594 else 595 *enc = ssl_cipher_methods[i]; 596 } 597 598 switch (c->algorithm_mac) { 599 case SSL_MD5: 600 i = SSL_MD_MD5_IDX; 601 break; 602 case SSL_SHA1: 603 i = SSL_MD_SHA1_IDX; 604 break; 605 case SSL_SHA256: 606 i = SSL_MD_SHA256_IDX; 607 break; 608 case SSL_SHA384: 609 i = SSL_MD_SHA384_IDX; 610 break; 611 case SSL_GOST94: 612 i = SSL_MD_GOST94_IDX; 613 break; 614 case SSL_GOST89MAC: 615 i = SSL_MD_GOST89MAC_IDX; 616 break; 617 default: 618 i = -1; 619 break; 620 } 621 if ((i < 0) || (i >= SSL_MD_NUM_IDX)) { 622 *md = NULL; 623 if (mac_pkey_type != NULL) 624 *mac_pkey_type = NID_undef; 625 if (mac_secret_size != NULL) 626 *mac_secret_size = 0; 627 if (c->algorithm_mac == SSL_AEAD) 628 mac_pkey_type = NULL; 629 } else { 630 *md = ssl_digest_methods[i]; 631 if (mac_pkey_type != NULL) 632 *mac_pkey_type = ssl_mac_pkey_id[i]; 633 if (mac_secret_size != NULL) 634 *mac_secret_size = ssl_mac_secret_size[i]; 635 } 636 637 if ((*enc != NULL) && 638 (*md != NULL || (EVP_CIPHER_flags(*enc) & EVP_CIPH_FLAG_AEAD_CIPHER)) 639 && (!mac_pkey_type || *mac_pkey_type != NID_undef)) { 640 const EVP_CIPHER *evp; 641 642 if (s->ssl_version >> 8 != TLS1_VERSION_MAJOR || 643 s->ssl_version < TLS1_VERSION) 644 return 1; 645 646#ifdef OPENSSL_FIPS 647 if (FIPS_mode()) 648 return 1; 649#endif 650 651 if (c->algorithm_enc == SSL_RC4 && 652 c->algorithm_mac == SSL_MD5 && 653 (evp = EVP_get_cipherbyname("RC4-HMAC-MD5"))) 654 *enc = evp, *md = NULL; 655 else if (c->algorithm_enc == SSL_AES128 && 656 c->algorithm_mac == SSL_SHA1 && 657 (evp = EVP_get_cipherbyname("AES-128-CBC-HMAC-SHA1"))) 658 *enc = evp, *md = NULL; 659 else if (c->algorithm_enc == SSL_AES256 && 660 c->algorithm_mac == SSL_SHA1 && 661 (evp = EVP_get_cipherbyname("AES-256-CBC-HMAC-SHA1"))) 662 *enc = evp, *md = NULL; 663 else if (c->algorithm_enc == SSL_AES128 && 664 c->algorithm_mac == SSL_SHA256 && 665 (evp = EVP_get_cipherbyname("AES-128-CBC-HMAC-SHA256"))) 666 *enc = evp, *md = NULL; 667 else if (c->algorithm_enc == SSL_AES256 && 668 c->algorithm_mac == SSL_SHA256 && 669 (evp = EVP_get_cipherbyname("AES-256-CBC-HMAC-SHA256"))) 670 *enc = evp, *md = NULL; 671 return (1); 672 } else 673 return (0); 674} 675 676int ssl_get_handshake_digest(int idx, long *mask, const EVP_MD **md) 677{ 678 if (idx < 0 || idx >= SSL_MD_NUM_IDX) { 679 return 0; 680 } 681 *mask = ssl_handshake_digest_flag[idx]; 682 if (*mask) 683 *md = ssl_digest_methods[idx]; 684 else 685 *md = NULL; 686 return 1; 687} 688 689#define ITEM_SEP(a) \ 690 (((a) == ':') || ((a) == ' ') || ((a) == ';') || ((a) == ',')) 691 692static void ll_append_tail(CIPHER_ORDER **head, CIPHER_ORDER *curr, 693 CIPHER_ORDER **tail) 694{ 695 if (curr == *tail) 696 return; 697 if (curr == *head) 698 *head = curr->next; 699 if (curr->prev != NULL) 700 curr->prev->next = curr->next; 701 if (curr->next != NULL) 702 curr->next->prev = curr->prev; 703 (*tail)->next = curr; 704 curr->prev = *tail; 705 curr->next = NULL; 706 *tail = curr; 707} 708 709static void ll_append_head(CIPHER_ORDER **head, CIPHER_ORDER *curr, 710 CIPHER_ORDER **tail) 711{ 712 if (curr == *head) 713 return; 714 if (curr == *tail) 715 *tail = curr->prev; 716 if (curr->next != NULL) 717 curr->next->prev = curr->prev; 718 if (curr->prev != NULL) 719 curr->prev->next = curr->next; 720 (*head)->prev = curr; 721 curr->next = *head; 722 curr->prev = NULL; 723 *head = curr; 724} 725 726static void ssl_cipher_get_disabled(unsigned long *mkey, unsigned long *auth, 727 unsigned long *enc, unsigned long *mac, 728 unsigned long *ssl) 729{ 730 *mkey = 0; 731 *auth = 0; 732 *enc = 0; 733 *mac = 0; 734 *ssl = 0; 735 736#ifdef OPENSSL_NO_RSA 737 *mkey |= SSL_kRSA; 738 *auth |= SSL_aRSA; 739#endif 740#ifdef OPENSSL_NO_DSA 741 *auth |= SSL_aDSS; 742#endif 743#ifdef OPENSSL_NO_DH 744 *mkey |= SSL_kDHr | SSL_kDHd | SSL_kEDH; 745 *auth |= SSL_aDH; 746#endif 747#ifdef OPENSSL_NO_KRB5 748 *mkey |= SSL_kKRB5; 749 *auth |= SSL_aKRB5; 750#endif 751#ifdef OPENSSL_NO_ECDSA 752 *auth |= SSL_aECDSA; 753#endif 754#ifdef OPENSSL_NO_ECDH 755 *mkey |= SSL_kECDHe | SSL_kECDHr; 756 *auth |= SSL_aECDH; 757#endif 758#ifdef OPENSSL_NO_PSK 759 *mkey |= SSL_kPSK; 760 *auth |= SSL_aPSK; 761#endif 762#ifdef OPENSSL_NO_SRP 763 *mkey |= SSL_kSRP; 764#endif 765 /* 766 * Check for presence of GOST 34.10 algorithms, and if they do not 767 * present, disable appropriate auth and key exchange 768 */ 769 if (!get_optional_pkey_id("gost94")) { 770 *auth |= SSL_aGOST94; 771 } 772 if (!get_optional_pkey_id("gost2001")) { 773 *auth |= SSL_aGOST01; 774 } 775 /* 776 * Disable GOST key exchange if no GOST signature algs are available * 777 */ 778 if ((*auth & (SSL_aGOST94 | SSL_aGOST01)) == (SSL_aGOST94 | SSL_aGOST01)) { 779 *mkey |= SSL_kGOST; 780 } 781#ifdef SSL_FORBID_ENULL 782 *enc |= SSL_eNULL; 783#endif 784 785 *enc |= (ssl_cipher_methods[SSL_ENC_DES_IDX] == NULL) ? SSL_DES : 0; 786 *enc |= (ssl_cipher_methods[SSL_ENC_3DES_IDX] == NULL) ? SSL_3DES : 0; 787 *enc |= (ssl_cipher_methods[SSL_ENC_RC4_IDX] == NULL) ? SSL_RC4 : 0; 788 *enc |= (ssl_cipher_methods[SSL_ENC_RC2_IDX] == NULL) ? SSL_RC2 : 0; 789 *enc |= (ssl_cipher_methods[SSL_ENC_IDEA_IDX] == NULL) ? SSL_IDEA : 0; 790 *enc |= (ssl_cipher_methods[SSL_ENC_AES128_IDX] == NULL) ? SSL_AES128 : 0; 791 *enc |= (ssl_cipher_methods[SSL_ENC_AES256_IDX] == NULL) ? SSL_AES256 : 0; 792 *enc |= 793 (ssl_cipher_methods[SSL_ENC_AES128GCM_IDX] == 794 NULL) ? SSL_AES128GCM : 0; 795 *enc |= 796 (ssl_cipher_methods[SSL_ENC_AES256GCM_IDX] == 797 NULL) ? SSL_AES256GCM : 0; 798 *enc |= 799 (ssl_cipher_methods[SSL_ENC_CAMELLIA128_IDX] == 800 NULL) ? SSL_CAMELLIA128 : 0; 801 *enc |= 802 (ssl_cipher_methods[SSL_ENC_CAMELLIA256_IDX] == 803 NULL) ? SSL_CAMELLIA256 : 0; 804 *enc |= 805 (ssl_cipher_methods[SSL_ENC_GOST89_IDX] == 806 NULL) ? SSL_eGOST2814789CNT : 0; 807 *enc |= (ssl_cipher_methods[SSL_ENC_SEED_IDX] == NULL) ? SSL_SEED : 0; 808 809 *mac |= (ssl_digest_methods[SSL_MD_MD5_IDX] == NULL) ? SSL_MD5 : 0; 810 *mac |= (ssl_digest_methods[SSL_MD_SHA1_IDX] == NULL) ? SSL_SHA1 : 0; 811 *mac |= (ssl_digest_methods[SSL_MD_SHA256_IDX] == NULL) ? SSL_SHA256 : 0; 812 *mac |= (ssl_digest_methods[SSL_MD_SHA384_IDX] == NULL) ? SSL_SHA384 : 0; 813 *mac |= (ssl_digest_methods[SSL_MD_GOST94_IDX] == NULL) ? SSL_GOST94 : 0; 814 *mac |= (ssl_digest_methods[SSL_MD_GOST89MAC_IDX] == NULL 815 || ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX] == 816 NID_undef) ? SSL_GOST89MAC : 0; 817 818} 819 820static void ssl_cipher_collect_ciphers(const SSL_METHOD *ssl_method, 821 int num_of_ciphers, 822 unsigned long disabled_mkey, 823 unsigned long disabled_auth, 824 unsigned long disabled_enc, 825 unsigned long disabled_mac, 826 unsigned long disabled_ssl, 827 CIPHER_ORDER *co_list, 828 CIPHER_ORDER **head_p, 829 CIPHER_ORDER **tail_p) 830{ 831 int i, co_list_num; 832 const SSL_CIPHER *c; 833 834 /* 835 * We have num_of_ciphers descriptions compiled in, depending on the 836 * method selected (SSLv2 and/or SSLv3, TLSv1 etc). 837 * These will later be sorted in a linked list with at most num 838 * entries. 839 */ 840 841 /* Get the initial list of ciphers */ 842 co_list_num = 0; /* actual count of ciphers */ 843 for (i = 0; i < num_of_ciphers; i++) { 844 c = ssl_method->get_cipher(i); 845 /* drop those that use any of that is not available */ 846 if ((c != NULL) && c->valid && 847#ifdef OPENSSL_FIPS 848 (!FIPS_mode() || (c->algo_strength & SSL_FIPS)) && 849#endif 850 !(c->algorithm_mkey & disabled_mkey) && 851 !(c->algorithm_auth & disabled_auth) && 852 !(c->algorithm_enc & disabled_enc) && 853 !(c->algorithm_mac & disabled_mac) && 854 !(c->algorithm_ssl & disabled_ssl)) { 855 co_list[co_list_num].cipher = c; 856 co_list[co_list_num].next = NULL; 857 co_list[co_list_num].prev = NULL; 858 co_list[co_list_num].active = 0; 859 co_list_num++; 860#ifdef KSSL_DEBUG 861 fprintf(stderr, "\t%d: %s %lx %lx %lx\n", i, c->name, c->id, 862 c->algorithm_mkey, c->algorithm_auth); 863#endif /* KSSL_DEBUG */ 864 /* 865 * if (!sk_push(ca_list,(char *)c)) goto err; 866 */ 867 } 868 } 869 870 /* 871 * Prepare linked list from list entries 872 */ 873 if (co_list_num > 0) { 874 co_list[0].prev = NULL; 875 876 if (co_list_num > 1) { 877 co_list[0].next = &co_list[1]; 878 879 for (i = 1; i < co_list_num - 1; i++) { 880 co_list[i].prev = &co_list[i - 1]; 881 co_list[i].next = &co_list[i + 1]; 882 } 883 884 co_list[co_list_num - 1].prev = &co_list[co_list_num - 2]; 885 } 886 887 co_list[co_list_num - 1].next = NULL; 888 889 *head_p = &co_list[0]; 890 *tail_p = &co_list[co_list_num - 1]; 891 } 892} 893 894static void ssl_cipher_collect_aliases(const SSL_CIPHER **ca_list, 895 int num_of_group_aliases, 896 unsigned long disabled_mkey, 897 unsigned long disabled_auth, 898 unsigned long disabled_enc, 899 unsigned long disabled_mac, 900 unsigned long disabled_ssl, 901 CIPHER_ORDER *head) 902{ 903 CIPHER_ORDER *ciph_curr; 904 const SSL_CIPHER **ca_curr; 905 int i; 906 unsigned long mask_mkey = ~disabled_mkey; 907 unsigned long mask_auth = ~disabled_auth; 908 unsigned long mask_enc = ~disabled_enc; 909 unsigned long mask_mac = ~disabled_mac; 910 unsigned long mask_ssl = ~disabled_ssl; 911 912 /* 913 * First, add the real ciphers as already collected 914 */ 915 ciph_curr = head; 916 ca_curr = ca_list; 917 while (ciph_curr != NULL) { 918 *ca_curr = ciph_curr->cipher; 919 ca_curr++; 920 ciph_curr = ciph_curr->next; 921 } 922 923 /* 924 * Now we add the available ones from the cipher_aliases[] table. 925 * They represent either one or more algorithms, some of which 926 * in any affected category must be supported (set in enabled_mask), 927 * or represent a cipher strength value (will be added in any case because algorithms=0). 928 */ 929 for (i = 0; i < num_of_group_aliases; i++) { 930 unsigned long algorithm_mkey = cipher_aliases[i].algorithm_mkey; 931 unsigned long algorithm_auth = cipher_aliases[i].algorithm_auth; 932 unsigned long algorithm_enc = cipher_aliases[i].algorithm_enc; 933 unsigned long algorithm_mac = cipher_aliases[i].algorithm_mac; 934 unsigned long algorithm_ssl = cipher_aliases[i].algorithm_ssl; 935 936 if (algorithm_mkey) 937 if ((algorithm_mkey & mask_mkey) == 0) 938 continue; 939 940 if (algorithm_auth) 941 if ((algorithm_auth & mask_auth) == 0) 942 continue; 943 944 if (algorithm_enc) 945 if ((algorithm_enc & mask_enc) == 0) 946 continue; 947 948 if (algorithm_mac) 949 if ((algorithm_mac & mask_mac) == 0) 950 continue; 951 952 if (algorithm_ssl) 953 if ((algorithm_ssl & mask_ssl) == 0) 954 continue; 955 956 *ca_curr = (SSL_CIPHER *)(cipher_aliases + i); 957 ca_curr++; 958 } 959 960 *ca_curr = NULL; /* end of list */ 961} 962 963static void ssl_cipher_apply_rule(unsigned long cipher_id, 964 unsigned long alg_mkey, 965 unsigned long alg_auth, 966 unsigned long alg_enc, 967 unsigned long alg_mac, 968 unsigned long alg_ssl, 969 unsigned long algo_strength, int rule, 970 int strength_bits, CIPHER_ORDER **head_p, 971 CIPHER_ORDER **tail_p) 972{ 973 CIPHER_ORDER *head, *tail, *curr, *next, *last; 974 const SSL_CIPHER *cp; 975 int reverse = 0; 976 977#ifdef CIPHER_DEBUG 978 fprintf(stderr, 979 "Applying rule %d with %08lx/%08lx/%08lx/%08lx/%08lx %08lx (%d)\n", 980 rule, alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl, 981 algo_strength, strength_bits); 982#endif 983 984 if (rule == CIPHER_DEL) 985 reverse = 1; /* needed to maintain sorting between 986 * currently deleted ciphers */ 987 988 head = *head_p; 989 tail = *tail_p; 990 991 if (reverse) { 992 next = tail; 993 last = head; 994 } else { 995 next = head; 996 last = tail; 997 } 998 999 curr = NULL; 1000 for (;;) { 1001 if (curr == last) 1002 break; 1003 1004 curr = next; 1005 1006 if (curr == NULL) 1007 break; 1008 1009 next = reverse ? curr->prev : curr->next; 1010 1011 cp = curr->cipher; 1012 1013 /* 1014 * Selection criteria is either the value of strength_bits 1015 * or the algorithms used. 1016 */ 1017 if (strength_bits >= 0) { 1018 if (strength_bits != cp->strength_bits) 1019 continue; 1020 } else { 1021#ifdef CIPHER_DEBUG 1022 fprintf(stderr, 1023 "\nName: %s:\nAlgo = %08lx/%08lx/%08lx/%08lx/%08lx Algo_strength = %08lx\n", 1024 cp->name, cp->algorithm_mkey, cp->algorithm_auth, 1025 cp->algorithm_enc, cp->algorithm_mac, cp->algorithm_ssl, 1026 cp->algo_strength); 1027#endif 1028#ifdef OPENSSL_SSL_DEBUG_BROKEN_PROTOCOL 1029 if (cipher_id && cipher_id != cp->id) 1030 continue; 1031#endif 1032 if (alg_mkey && !(alg_mkey & cp->algorithm_mkey)) 1033 continue; 1034 if (alg_auth && !(alg_auth & cp->algorithm_auth)) 1035 continue; 1036 if (alg_enc && !(alg_enc & cp->algorithm_enc)) 1037 continue; 1038 if (alg_mac && !(alg_mac & cp->algorithm_mac)) 1039 continue; 1040 if (alg_ssl && !(alg_ssl & cp->algorithm_ssl)) 1041 continue; 1042 if ((algo_strength & SSL_EXP_MASK) 1043 && !(algo_strength & SSL_EXP_MASK & cp->algo_strength)) 1044 continue; 1045 if ((algo_strength & SSL_STRONG_MASK) 1046 && !(algo_strength & SSL_STRONG_MASK & cp->algo_strength)) 1047 continue; 1048 if ((algo_strength & SSL_NOT_DEFAULT) 1049 && !(cp->algo_strength & SSL_NOT_DEFAULT)) 1050 continue; 1051 } 1052 1053#ifdef CIPHER_DEBUG 1054 fprintf(stderr, "Action = %d\n", rule); 1055#endif 1056 1057 /* add the cipher if it has not been added yet. */ 1058 if (rule == CIPHER_ADD) { 1059 /* reverse == 0 */ 1060 if (!curr->active) { 1061 ll_append_tail(&head, curr, &tail); 1062 curr->active = 1; 1063 } 1064 } 1065 /* Move the added cipher to this location */ 1066 else if (rule == CIPHER_ORD) { 1067 /* reverse == 0 */ 1068 if (curr->active) { 1069 ll_append_tail(&head, curr, &tail); 1070 } 1071 } else if (rule == CIPHER_DEL) { 1072 /* reverse == 1 */ 1073 if (curr->active) { 1074 /* 1075 * most recently deleted ciphersuites get best positions for 1076 * any future CIPHER_ADD (note that the CIPHER_DEL loop works 1077 * in reverse to maintain the order) 1078 */ 1079 ll_append_head(&head, curr, &tail); 1080 curr->active = 0; 1081 } 1082 } else if (rule == CIPHER_KILL) { 1083 /* reverse == 0 */ 1084 if (head == curr) 1085 head = curr->next; 1086 else 1087 curr->prev->next = curr->next; 1088 if (tail == curr) 1089 tail = curr->prev; 1090 curr->active = 0; 1091 if (curr->next != NULL) 1092 curr->next->prev = curr->prev; 1093 if (curr->prev != NULL) 1094 curr->prev->next = curr->next; 1095 curr->next = NULL; 1096 curr->prev = NULL; 1097 } 1098 } 1099 1100 *head_p = head; 1101 *tail_p = tail; 1102} 1103 1104static int ssl_cipher_strength_sort(CIPHER_ORDER **head_p, 1105 CIPHER_ORDER **tail_p) 1106{ 1107 int max_strength_bits, i, *number_uses; 1108 CIPHER_ORDER *curr; 1109 1110 /* 1111 * This routine sorts the ciphers with descending strength. The sorting 1112 * must keep the pre-sorted sequence, so we apply the normal sorting 1113 * routine as '+' movement to the end of the list. 1114 */ 1115 max_strength_bits = 0; 1116 curr = *head_p; 1117 while (curr != NULL) { 1118 if (curr->active && (curr->cipher->strength_bits > max_strength_bits)) 1119 max_strength_bits = curr->cipher->strength_bits; 1120 curr = curr->next; 1121 } 1122 1123 number_uses = OPENSSL_malloc((max_strength_bits + 1) * sizeof(int)); 1124 if (!number_uses) { 1125 SSLerr(SSL_F_SSL_CIPHER_STRENGTH_SORT, ERR_R_MALLOC_FAILURE); 1126 return (0); 1127 } 1128 memset(number_uses, 0, (max_strength_bits + 1) * sizeof(int)); 1129 1130 /* 1131 * Now find the strength_bits values actually used 1132 */ 1133 curr = *head_p; 1134 while (curr != NULL) { 1135 if (curr->active) 1136 number_uses[curr->cipher->strength_bits]++; 1137 curr = curr->next; 1138 } 1139 /* 1140 * Go through the list of used strength_bits values in descending 1141 * order. 1142 */ 1143 for (i = max_strength_bits; i >= 0; i--) 1144 if (number_uses[i] > 0) 1145 ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_ORD, i, head_p, 1146 tail_p); 1147 1148 OPENSSL_free(number_uses); 1149 return (1); 1150} 1151 1152static int ssl_cipher_process_rulestr(const char *rule_str, 1153 CIPHER_ORDER **head_p, 1154 CIPHER_ORDER **tail_p, 1155 const SSL_CIPHER **ca_list) 1156{ 1157 unsigned long alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl, 1158 algo_strength; 1159 const char *l, *buf; 1160 int j, multi, found, rule, retval, ok, buflen; 1161 unsigned long cipher_id = 0; 1162 char ch; 1163 1164 retval = 1; 1165 l = rule_str; 1166 for (;;) { 1167 ch = *l; 1168 1169 if (ch == '\0') 1170 break; /* done */ 1171 if (ch == '-') { 1172 rule = CIPHER_DEL; 1173 l++; 1174 } else if (ch == '+') { 1175 rule = CIPHER_ORD; 1176 l++; 1177 } else if (ch == '!') { 1178 rule = CIPHER_KILL; 1179 l++; 1180 } else if (ch == '@') { 1181 rule = CIPHER_SPECIAL; 1182 l++; 1183 } else { 1184 rule = CIPHER_ADD; 1185 } 1186 1187 if (ITEM_SEP(ch)) { 1188 l++; 1189 continue; 1190 } 1191 1192 alg_mkey = 0; 1193 alg_auth = 0; 1194 alg_enc = 0; 1195 alg_mac = 0; 1196 alg_ssl = 0; 1197 algo_strength = 0; 1198 1199 for (;;) { 1200 ch = *l; 1201 buf = l; 1202 buflen = 0; 1203#ifndef CHARSET_EBCDIC 1204 while (((ch >= 'A') && (ch <= 'Z')) || 1205 ((ch >= '0') && (ch <= '9')) || 1206 ((ch >= 'a') && (ch <= 'z')) || (ch == '-') || (ch == '.')) 1207#else 1208 while (isalnum(ch) || (ch == '-') || (ch == '.')) 1209#endif 1210 { 1211 ch = *(++l); 1212 buflen++; 1213 } 1214 1215 if (buflen == 0) { 1216 /* 1217 * We hit something we cannot deal with, 1218 * it is no command or separator nor 1219 * alphanumeric, so we call this an error. 1220 */ 1221 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR, 1222 SSL_R_INVALID_COMMAND); 1223 retval = found = 0; 1224 l++; 1225 break; 1226 } 1227 1228 if (rule == CIPHER_SPECIAL) { 1229 found = 0; /* unused -- avoid compiler warning */ 1230 break; /* special treatment */ 1231 } 1232 1233 /* check for multi-part specification */ 1234 if (ch == '+') { 1235 multi = 1; 1236 l++; 1237 } else 1238 multi = 0; 1239 1240 /* 1241 * Now search for the cipher alias in the ca_list. Be careful 1242 * with the strncmp, because the "buflen" limitation 1243 * will make the rule "ADH:SOME" and the cipher 1244 * "ADH-MY-CIPHER" look like a match for buflen=3. 1245 * So additionally check whether the cipher name found 1246 * has the correct length. We can save a strlen() call: 1247 * just checking for the '\0' at the right place is 1248 * sufficient, we have to strncmp() anyway. (We cannot 1249 * use strcmp(), because buf is not '\0' terminated.) 1250 */ 1251 j = found = 0; 1252 cipher_id = 0; 1253 while (ca_list[j]) { 1254 if (!strncmp(buf, ca_list[j]->name, buflen) && 1255 (ca_list[j]->name[buflen] == '\0')) { 1256 found = 1; 1257 break; 1258 } else 1259 j++; 1260 } 1261 1262 if (!found) 1263 break; /* ignore this entry */ 1264 1265 if (ca_list[j]->algorithm_mkey) { 1266 if (alg_mkey) { 1267 alg_mkey &= ca_list[j]->algorithm_mkey; 1268 if (!alg_mkey) { 1269 found = 0; 1270 break; 1271 } 1272 } else 1273 alg_mkey = ca_list[j]->algorithm_mkey; 1274 } 1275 1276 if (ca_list[j]->algorithm_auth) { 1277 if (alg_auth) { 1278 alg_auth &= ca_list[j]->algorithm_auth; 1279 if (!alg_auth) { 1280 found = 0; 1281 break; 1282 } 1283 } else 1284 alg_auth = ca_list[j]->algorithm_auth; 1285 } 1286 1287 if (ca_list[j]->algorithm_enc) { 1288 if (alg_enc) { 1289 alg_enc &= ca_list[j]->algorithm_enc; 1290 if (!alg_enc) { 1291 found = 0; 1292 break; 1293 } 1294 } else 1295 alg_enc = ca_list[j]->algorithm_enc; 1296 } 1297 1298 if (ca_list[j]->algorithm_mac) { 1299 if (alg_mac) { 1300 alg_mac &= ca_list[j]->algorithm_mac; 1301 if (!alg_mac) { 1302 found = 0; 1303 break; 1304 } 1305 } else 1306 alg_mac = ca_list[j]->algorithm_mac; 1307 } 1308 1309 if (ca_list[j]->algo_strength & SSL_EXP_MASK) { 1310 if (algo_strength & SSL_EXP_MASK) { 1311 algo_strength &= 1312 (ca_list[j]->algo_strength & SSL_EXP_MASK) | 1313 ~SSL_EXP_MASK; 1314 if (!(algo_strength & SSL_EXP_MASK)) { 1315 found = 0; 1316 break; 1317 } 1318 } else 1319 algo_strength |= ca_list[j]->algo_strength & SSL_EXP_MASK; 1320 } 1321 1322 if (ca_list[j]->algo_strength & SSL_STRONG_MASK) { 1323 if (algo_strength & SSL_STRONG_MASK) { 1324 algo_strength &= 1325 (ca_list[j]->algo_strength & SSL_STRONG_MASK) | 1326 ~SSL_STRONG_MASK; 1327 if (!(algo_strength & SSL_STRONG_MASK)) { 1328 found = 0; 1329 break; 1330 } 1331 } else 1332 algo_strength |= 1333 ca_list[j]->algo_strength & SSL_STRONG_MASK; 1334 } 1335 1336 if (ca_list[j]->algo_strength & SSL_NOT_DEFAULT) { 1337 algo_strength |= SSL_NOT_DEFAULT; 1338 } 1339 1340 if (ca_list[j]->valid) { 1341 /* 1342 * explicit ciphersuite found; its protocol version does not 1343 * become part of the search pattern! 1344 */ 1345 1346 cipher_id = ca_list[j]->id; 1347 } else { 1348 /* 1349 * not an explicit ciphersuite; only in this case, the 1350 * protocol version is considered part of the search pattern 1351 */ 1352 1353 if (ca_list[j]->algorithm_ssl) { 1354 if (alg_ssl) { 1355 alg_ssl &= ca_list[j]->algorithm_ssl; 1356 if (!alg_ssl) { 1357 found = 0; 1358 break; 1359 } 1360 } else 1361 alg_ssl = ca_list[j]->algorithm_ssl; 1362 } 1363 } 1364 1365 if (!multi) 1366 break; 1367 } 1368 1369 /* 1370 * Ok, we have the rule, now apply it 1371 */ 1372 if (rule == CIPHER_SPECIAL) { /* special command */ 1373 ok = 0; 1374 if ((buflen == 8) && !strncmp(buf, "STRENGTH", 8)) 1375 ok = ssl_cipher_strength_sort(head_p, tail_p); 1376 else 1377 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR, 1378 SSL_R_INVALID_COMMAND); 1379 if (ok == 0) 1380 retval = 0; 1381 /* 1382 * We do not support any "multi" options 1383 * together with "@", so throw away the 1384 * rest of the command, if any left, until 1385 * end or ':' is found. 1386 */ 1387 while ((*l != '\0') && !ITEM_SEP(*l)) 1388 l++; 1389 } else if (found) { 1390 ssl_cipher_apply_rule(cipher_id, 1391 alg_mkey, alg_auth, alg_enc, alg_mac, 1392 alg_ssl, algo_strength, rule, -1, head_p, 1393 tail_p); 1394 } else { 1395 while ((*l != '\0') && !ITEM_SEP(*l)) 1396 l++; 1397 } 1398 if (*l == '\0') 1399 break; /* done */ 1400 } 1401 1402 return (retval); 1403} 1404 1405#ifndef OPENSSL_NO_EC 1406static int check_suiteb_cipher_list(const SSL_METHOD *meth, CERT *c, 1407 const char **prule_str) 1408{ 1409 unsigned int suiteb_flags = 0, suiteb_comb2 = 0; 1410 if (strncmp(*prule_str, "SUITEB128ONLY", 13) == 0) { 1411 suiteb_flags = SSL_CERT_FLAG_SUITEB_128_LOS_ONLY; 1412 } else if (strncmp(*prule_str, "SUITEB128C2", 11) == 0) { 1413 suiteb_comb2 = 1; 1414 suiteb_flags = SSL_CERT_FLAG_SUITEB_128_LOS; 1415 } else if (strncmp(*prule_str, "SUITEB128", 9) == 0) { 1416 suiteb_flags = SSL_CERT_FLAG_SUITEB_128_LOS; 1417 } else if (strncmp(*prule_str, "SUITEB192", 9) == 0) { 1418 suiteb_flags = SSL_CERT_FLAG_SUITEB_192_LOS; 1419 } 1420 1421 if (suiteb_flags) { 1422 c->cert_flags &= ~SSL_CERT_FLAG_SUITEB_128_LOS; 1423 c->cert_flags |= suiteb_flags; 1424 } else 1425 suiteb_flags = c->cert_flags & SSL_CERT_FLAG_SUITEB_128_LOS; 1426 1427 if (!suiteb_flags) 1428 return 1; 1429 /* Check version: if TLS 1.2 ciphers allowed we can use Suite B */ 1430 1431 if (!(meth->ssl3_enc->enc_flags & SSL_ENC_FLAG_TLS1_2_CIPHERS)) { 1432 if (meth->ssl3_enc->enc_flags & SSL_ENC_FLAG_DTLS) 1433 SSLerr(SSL_F_CHECK_SUITEB_CIPHER_LIST, 1434 SSL_R_ONLY_DTLS_1_2_ALLOWED_IN_SUITEB_MODE); 1435 else 1436 SSLerr(SSL_F_CHECK_SUITEB_CIPHER_LIST, 1437 SSL_R_ONLY_TLS_1_2_ALLOWED_IN_SUITEB_MODE); 1438 return 0; 1439 } 1440# ifndef OPENSSL_NO_ECDH 1441 switch (suiteb_flags) { 1442 case SSL_CERT_FLAG_SUITEB_128_LOS: 1443 if (suiteb_comb2) 1444 *prule_str = "ECDHE-ECDSA-AES256-GCM-SHA384"; 1445 else 1446 *prule_str = 1447 "ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384"; 1448 break; 1449 case SSL_CERT_FLAG_SUITEB_128_LOS_ONLY: 1450 *prule_str = "ECDHE-ECDSA-AES128-GCM-SHA256"; 1451 break; 1452 case SSL_CERT_FLAG_SUITEB_192_LOS: 1453 *prule_str = "ECDHE-ECDSA-AES256-GCM-SHA384"; 1454 break; 1455 } 1456 /* Set auto ECDH parameter determination */ 1457 c->ecdh_tmp_auto = 1; 1458 return 1; 1459# else 1460 SSLerr(SSL_F_CHECK_SUITEB_CIPHER_LIST, 1461 SSL_R_ECDH_REQUIRED_FOR_SUITEB_MODE); 1462 return 0; 1463# endif 1464} 1465#endif 1466 1467STACK_OF(SSL_CIPHER) *ssl_create_cipher_list(const SSL_METHOD *ssl_method, STACK_OF(SSL_CIPHER) 1468 **cipher_list, STACK_OF(SSL_CIPHER) 1469 **cipher_list_by_id, 1470 const char *rule_str, CERT *c) 1471{ 1472 int ok, num_of_ciphers, num_of_alias_max, num_of_group_aliases; 1473 unsigned long disabled_mkey, disabled_auth, disabled_enc, disabled_mac, 1474 disabled_ssl; 1475 STACK_OF(SSL_CIPHER) *cipherstack, *tmp_cipher_list; 1476 const char *rule_p; 1477 CIPHER_ORDER *co_list = NULL, *head = NULL, *tail = NULL, *curr; 1478 const SSL_CIPHER **ca_list = NULL; 1479 1480 /* 1481 * Return with error if nothing to do. 1482 */ 1483 if (rule_str == NULL || cipher_list == NULL || cipher_list_by_id == NULL) 1484 return NULL; 1485#ifndef OPENSSL_NO_EC 1486 if (!check_suiteb_cipher_list(ssl_method, c, &rule_str)) 1487 return NULL; 1488#endif 1489 1490 /* 1491 * To reduce the work to do we only want to process the compiled 1492 * in algorithms, so we first get the mask of disabled ciphers. 1493 */ 1494 ssl_cipher_get_disabled(&disabled_mkey, &disabled_auth, &disabled_enc, 1495 &disabled_mac, &disabled_ssl); 1496 1497 /* 1498 * Now we have to collect the available ciphers from the compiled 1499 * in ciphers. We cannot get more than the number compiled in, so 1500 * it is used for allocation. 1501 */ 1502 num_of_ciphers = ssl_method->num_ciphers(); 1503#ifdef KSSL_DEBUG 1504 fprintf(stderr, "ssl_create_cipher_list() for %d ciphers\n", 1505 num_of_ciphers); 1506#endif /* KSSL_DEBUG */ 1507 co_list = 1508 (CIPHER_ORDER *)OPENSSL_malloc(sizeof(CIPHER_ORDER) * num_of_ciphers); 1509 if (co_list == NULL) { 1510 SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST, ERR_R_MALLOC_FAILURE); 1511 return (NULL); /* Failure */ 1512 } 1513 1514 ssl_cipher_collect_ciphers(ssl_method, num_of_ciphers, 1515 disabled_mkey, disabled_auth, disabled_enc, 1516 disabled_mac, disabled_ssl, co_list, &head, 1517 &tail); 1518 1519 /* Now arrange all ciphers by preference: */ 1520 1521 /* 1522 * Everything else being equal, prefer ephemeral ECDH over other key 1523 * exchange mechanisms 1524 */ 1525 ssl_cipher_apply_rule(0, SSL_kEECDH, 0, 0, 0, 0, 0, CIPHER_ADD, -1, &head, 1526 &tail); 1527 ssl_cipher_apply_rule(0, SSL_kEECDH, 0, 0, 0, 0, 0, CIPHER_DEL, -1, &head, 1528 &tail); 1529 1530 /* AES is our preferred symmetric cipher */ 1531 ssl_cipher_apply_rule(0, 0, 0, SSL_AES, 0, 0, 0, CIPHER_ADD, -1, &head, 1532 &tail); 1533 1534 /* Temporarily enable everything else for sorting */ 1535 ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_ADD, -1, &head, &tail); 1536 1537 /* Low priority for MD5 */ 1538 ssl_cipher_apply_rule(0, 0, 0, 0, SSL_MD5, 0, 0, CIPHER_ORD, -1, &head, 1539 &tail); 1540 1541 /* 1542 * Move anonymous ciphers to the end. Usually, these will remain 1543 * disabled. (For applications that allow them, they aren't too bad, but 1544 * we prefer authenticated ciphers.) 1545 */ 1546 ssl_cipher_apply_rule(0, 0, SSL_aNULL, 0, 0, 0, 0, CIPHER_ORD, -1, &head, 1547 &tail); 1548 1549 /* Move ciphers without forward secrecy to the end */ 1550 ssl_cipher_apply_rule(0, 0, SSL_aECDH, 0, 0, 0, 0, CIPHER_ORD, -1, &head, 1551 &tail); 1552 /* 1553 * ssl_cipher_apply_rule(0, 0, SSL_aDH, 0, 0, 0, 0, CIPHER_ORD, -1, 1554 * &head, &tail); 1555 */ 1556 ssl_cipher_apply_rule(0, SSL_kRSA, 0, 0, 0, 0, 0, CIPHER_ORD, -1, &head, 1557 &tail); 1558 ssl_cipher_apply_rule(0, SSL_kPSK, 0, 0, 0, 0, 0, CIPHER_ORD, -1, &head, 1559 &tail); 1560 ssl_cipher_apply_rule(0, SSL_kKRB5, 0, 0, 0, 0, 0, CIPHER_ORD, -1, &head, 1561 &tail); 1562 1563 /* RC4 is sort-of broken -- move the the end */ 1564 ssl_cipher_apply_rule(0, 0, 0, SSL_RC4, 0, 0, 0, CIPHER_ORD, -1, &head, 1565 &tail); 1566 1567 /* 1568 * Now sort by symmetric encryption strength. The above ordering remains 1569 * in force within each class 1570 */ 1571 if (!ssl_cipher_strength_sort(&head, &tail)) { 1572 OPENSSL_free(co_list); 1573 return NULL; 1574 } 1575 1576 /* Now disable everything (maintaining the ordering!) */ 1577 ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_DEL, -1, &head, &tail); 1578 1579 /* 1580 * We also need cipher aliases for selecting based on the rule_str. 1581 * There might be two types of entries in the rule_str: 1) names 1582 * of ciphers themselves 2) aliases for groups of ciphers. 1583 * For 1) we need the available ciphers and for 2) the cipher 1584 * groups of cipher_aliases added together in one list (otherwise 1585 * we would be happy with just the cipher_aliases table). 1586 */ 1587 num_of_group_aliases = sizeof(cipher_aliases) / sizeof(SSL_CIPHER); 1588 num_of_alias_max = num_of_ciphers + num_of_group_aliases + 1; 1589 ca_list = OPENSSL_malloc(sizeof(SSL_CIPHER *) * num_of_alias_max); 1590 if (ca_list == NULL) { 1591 OPENSSL_free(co_list); 1592 SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST, ERR_R_MALLOC_FAILURE); 1593 return (NULL); /* Failure */ 1594 } 1595 ssl_cipher_collect_aliases(ca_list, num_of_group_aliases, 1596 disabled_mkey, disabled_auth, disabled_enc, 1597 disabled_mac, disabled_ssl, head); 1598 1599 /* 1600 * If the rule_string begins with DEFAULT, apply the default rule 1601 * before using the (possibly available) additional rules. 1602 */ 1603 ok = 1; 1604 rule_p = rule_str; 1605 if (strncmp(rule_str, "DEFAULT", 7) == 0) { 1606 ok = ssl_cipher_process_rulestr(SSL_DEFAULT_CIPHER_LIST, 1607 &head, &tail, ca_list); 1608 rule_p += 7; 1609 if (*rule_p == ':') 1610 rule_p++; 1611 } 1612 1613 if (ok && (strlen(rule_p) > 0)) 1614 ok = ssl_cipher_process_rulestr(rule_p, &head, &tail, ca_list); 1615 1616 OPENSSL_free((void *)ca_list); /* Not needed anymore */ 1617 1618 if (!ok) { /* Rule processing failure */ 1619 OPENSSL_free(co_list); 1620 return (NULL); 1621 } 1622 1623 /* 1624 * Allocate new "cipherstack" for the result, return with error 1625 * if we cannot get one. 1626 */ 1627 if ((cipherstack = sk_SSL_CIPHER_new_null()) == NULL) { 1628 OPENSSL_free(co_list); 1629 return (NULL); 1630 } 1631 1632 /* 1633 * The cipher selection for the list is done. The ciphers are added 1634 * to the resulting precedence to the STACK_OF(SSL_CIPHER). 1635 */ 1636 for (curr = head; curr != NULL; curr = curr->next) { 1637#ifdef OPENSSL_FIPS 1638 if (curr->active 1639 && (!FIPS_mode() || curr->cipher->algo_strength & SSL_FIPS)) 1640#else 1641 if (curr->active) 1642#endif 1643 { 1644 sk_SSL_CIPHER_push(cipherstack, curr->cipher); 1645#ifdef CIPHER_DEBUG 1646 fprintf(stderr, "<%s>\n", curr->cipher->name); 1647#endif 1648 } 1649 } 1650 OPENSSL_free(co_list); /* Not needed any longer */ 1651 1652 tmp_cipher_list = sk_SSL_CIPHER_dup(cipherstack); 1653 if (tmp_cipher_list == NULL) { 1654 sk_SSL_CIPHER_free(cipherstack); 1655 return NULL; 1656 } 1657 if (*cipher_list != NULL) 1658 sk_SSL_CIPHER_free(*cipher_list); 1659 *cipher_list = cipherstack; 1660 if (*cipher_list_by_id != NULL) 1661 sk_SSL_CIPHER_free(*cipher_list_by_id); 1662 *cipher_list_by_id = tmp_cipher_list; 1663 (void)sk_SSL_CIPHER_set_cmp_func(*cipher_list_by_id, 1664 ssl_cipher_ptr_id_cmp); 1665 1666 sk_SSL_CIPHER_sort(*cipher_list_by_id); 1667 return (cipherstack); 1668} 1669 1670char *SSL_CIPHER_description(const SSL_CIPHER *cipher, char *buf, int len) 1671{ 1672 int is_export, pkl, kl; 1673 const char *ver, *exp_str; 1674 const char *kx, *au, *enc, *mac; 1675 unsigned long alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl, alg2; 1676#ifdef KSSL_DEBUG 1677 static const char *format = 1678 "%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s%s AL=%lx/%lx/%lx/%lx/%lx\n"; 1679#else 1680 static const char *format = 1681 "%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s%s\n"; 1682#endif /* KSSL_DEBUG */ 1683 1684 alg_mkey = cipher->algorithm_mkey; 1685 alg_auth = cipher->algorithm_auth; 1686 alg_enc = cipher->algorithm_enc; 1687 alg_mac = cipher->algorithm_mac; 1688 alg_ssl = cipher->algorithm_ssl; 1689 1690 alg2 = cipher->algorithm2; 1691 1692 is_export = SSL_C_IS_EXPORT(cipher); 1693 pkl = SSL_C_EXPORT_PKEYLENGTH(cipher); 1694 kl = SSL_C_EXPORT_KEYLENGTH(cipher); 1695 exp_str = is_export ? " export" : ""; 1696 1697 if (alg_ssl & SSL_SSLV2) 1698 ver = "SSLv2"; 1699 else if (alg_ssl & SSL_SSLV3) 1700 ver = "SSLv3"; 1701 else if (alg_ssl & SSL_TLSV1_2) 1702 ver = "TLSv1.2"; 1703 else 1704 ver = "unknown"; 1705 1706 switch (alg_mkey) { 1707 case SSL_kRSA: 1708 kx = is_export ? (pkl == 512 ? "RSA(512)" : "RSA(1024)") : "RSA"; 1709 break; 1710 case SSL_kDHr: 1711 kx = "DH/RSA"; 1712 break; 1713 case SSL_kDHd: 1714 kx = "DH/DSS"; 1715 break; 1716 case SSL_kKRB5: 1717 kx = "KRB5"; 1718 break; 1719 case SSL_kEDH: 1720 kx = is_export ? (pkl == 512 ? "DH(512)" : "DH(1024)") : "DH"; 1721 break; 1722 case SSL_kECDHr: 1723 kx = "ECDH/RSA"; 1724 break; 1725 case SSL_kECDHe: 1726 kx = "ECDH/ECDSA"; 1727 break; 1728 case SSL_kEECDH: 1729 kx = "ECDH"; 1730 break; 1731 case SSL_kPSK: 1732 kx = "PSK"; 1733 break; 1734 case SSL_kSRP: 1735 kx = "SRP"; 1736 break; 1737 case SSL_kGOST: 1738 kx = "GOST"; 1739 break; 1740 default: 1741 kx = "unknown"; 1742 } 1743 1744 switch (alg_auth) { 1745 case SSL_aRSA: 1746 au = "RSA"; 1747 break; 1748 case SSL_aDSS: 1749 au = "DSS"; 1750 break; 1751 case SSL_aDH: 1752 au = "DH"; 1753 break; 1754 case SSL_aKRB5: 1755 au = "KRB5"; 1756 break; 1757 case SSL_aECDH: 1758 au = "ECDH"; 1759 break; 1760 case SSL_aNULL: 1761 au = "None"; 1762 break; 1763 case SSL_aECDSA: 1764 au = "ECDSA"; 1765 break; 1766 case SSL_aPSK: 1767 au = "PSK"; 1768 break; 1769 case SSL_aSRP: 1770 au = "SRP"; 1771 break; 1772 case SSL_aGOST94: 1773 au = "GOST94"; 1774 break; 1775 case SSL_aGOST01: 1776 au = "GOST01"; 1777 break; 1778 default: 1779 au = "unknown"; 1780 break; 1781 } 1782 1783 switch (alg_enc) { 1784 case SSL_DES: 1785 enc = (is_export && kl == 5) ? "DES(40)" : "DES(56)"; 1786 break; 1787 case SSL_3DES: 1788 enc = "3DES(168)"; 1789 break; 1790 case SSL_RC4: 1791 enc = is_export ? (kl == 5 ? "RC4(40)" : "RC4(56)") 1792 : ((alg2 & SSL2_CF_8_BYTE_ENC) ? "RC4(64)" : "RC4(128)"); 1793 break; 1794 case SSL_RC2: 1795 enc = is_export ? (kl == 5 ? "RC2(40)" : "RC2(56)") : "RC2(128)"; 1796 break; 1797 case SSL_IDEA: 1798 enc = "IDEA(128)"; 1799 break; 1800 case SSL_eNULL: 1801 enc = "None"; 1802 break; 1803 case SSL_AES128: 1804 enc = "AES(128)"; 1805 break; 1806 case SSL_AES256: 1807 enc = "AES(256)"; 1808 break; 1809 case SSL_AES128GCM: 1810 enc = "AESGCM(128)"; 1811 break; 1812 case SSL_AES256GCM: 1813 enc = "AESGCM(256)"; 1814 break; 1815 case SSL_CAMELLIA128: 1816 enc = "Camellia(128)"; 1817 break; 1818 case SSL_CAMELLIA256: 1819 enc = "Camellia(256)"; 1820 break; 1821 case SSL_SEED: 1822 enc = "SEED(128)"; 1823 break; 1824 case SSL_eGOST2814789CNT: 1825 enc = "GOST89(256)"; 1826 break; 1827 default: 1828 enc = "unknown"; 1829 break; 1830 } 1831 1832 switch (alg_mac) { 1833 case SSL_MD5: 1834 mac = "MD5"; 1835 break; 1836 case SSL_SHA1: 1837 mac = "SHA1"; 1838 break; 1839 case SSL_SHA256: 1840 mac = "SHA256"; 1841 break; 1842 case SSL_SHA384: 1843 mac = "SHA384"; 1844 break; 1845 case SSL_AEAD: 1846 mac = "AEAD"; 1847 break; 1848 case SSL_GOST89MAC: 1849 mac = "GOST89"; 1850 break; 1851 case SSL_GOST94: 1852 mac = "GOST94"; 1853 break; 1854 default: 1855 mac = "unknown"; 1856 break; 1857 } 1858 1859 if (buf == NULL) { 1860 len = 128; 1861 buf = OPENSSL_malloc(len); 1862 if (buf == NULL) 1863 return ("OPENSSL_malloc Error"); 1864 } else if (len < 128) 1865 return ("Buffer too small"); 1866 1867#ifdef KSSL_DEBUG 1868 BIO_snprintf(buf, len, format, cipher->name, ver, kx, au, enc, mac, 1869 exp_str, alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl); 1870#else 1871 BIO_snprintf(buf, len, format, cipher->name, ver, kx, au, enc, mac, 1872 exp_str); 1873#endif /* KSSL_DEBUG */ 1874 return (buf); 1875} 1876 1877char *SSL_CIPHER_get_version(const SSL_CIPHER *c) 1878{ 1879 int i; 1880 1881 if (c == NULL) 1882 return ("(NONE)"); 1883 i = (int)(c->id >> 24L); 1884 if (i == 3) 1885 return ("TLSv1/SSLv3"); 1886 else if (i == 2) 1887 return ("SSLv2"); 1888 else 1889 return ("unknown"); 1890} 1891 1892/* return the actual cipher being used */ 1893const char *SSL_CIPHER_get_name(const SSL_CIPHER *c) 1894{ 1895 if (c != NULL) 1896 return (c->name); 1897 return ("(NONE)"); 1898} 1899 1900/* number of bits for symmetric cipher */ 1901int SSL_CIPHER_get_bits(const SSL_CIPHER *c, int *alg_bits) 1902{ 1903 int ret = 0; 1904 1905 if (c != NULL) { 1906 if (alg_bits != NULL) 1907 *alg_bits = c->alg_bits; 1908 ret = c->strength_bits; 1909 } 1910 return (ret); 1911} 1912 1913unsigned long SSL_CIPHER_get_id(const SSL_CIPHER *c) 1914{ 1915 return c->id; 1916} 1917 1918SSL_COMP *ssl3_comp_find(STACK_OF(SSL_COMP) *sk, int n) 1919{ 1920 SSL_COMP *ctmp; 1921 int i, nn; 1922 1923 if ((n == 0) || (sk == NULL)) 1924 return (NULL); 1925 nn = sk_SSL_COMP_num(sk); 1926 for (i = 0; i < nn; i++) { 1927 ctmp = sk_SSL_COMP_value(sk, i); 1928 if (ctmp->id == n) 1929 return (ctmp); 1930 } 1931 return (NULL); 1932} 1933 1934#ifdef OPENSSL_NO_COMP 1935STACK_OF(SSL_COMP) *SSL_COMP_get_compression_methods(void) 1936{ 1937 return NULL; 1938} 1939 1940STACK_OF(SSL_COMP) *SSL_COMP_set0_compression_methods(STACK_OF(SSL_COMP) 1941 *meths) 1942{ 1943 return NULL; 1944} 1945 1946void SSL_COMP_free_compression_methods(void) 1947{ 1948} 1949 1950int SSL_COMP_add_compression_method(int id, COMP_METHOD *cm) 1951{ 1952 return 1; 1953} 1954 1955const char *SSL_COMP_get_name(const COMP_METHOD *comp) 1956{ 1957 return NULL; 1958} 1959#else 1960STACK_OF(SSL_COMP) *SSL_COMP_get_compression_methods(void) 1961{ 1962 load_builtin_compressions(); 1963 return (ssl_comp_methods); 1964} 1965 1966STACK_OF(SSL_COMP) *SSL_COMP_set0_compression_methods(STACK_OF(SSL_COMP) 1967 *meths) 1968{ 1969 STACK_OF(SSL_COMP) *old_meths = ssl_comp_methods; 1970 ssl_comp_methods = meths; 1971 return old_meths; 1972} 1973 1974static void cmeth_free(SSL_COMP *cm) 1975{ 1976 OPENSSL_free(cm); 1977} 1978 1979void SSL_COMP_free_compression_methods(void) 1980{ 1981 STACK_OF(SSL_COMP) *old_meths = ssl_comp_methods; 1982 ssl_comp_methods = NULL; 1983 sk_SSL_COMP_pop_free(old_meths, cmeth_free); 1984} 1985 1986int SSL_COMP_add_compression_method(int id, COMP_METHOD *cm) 1987{ 1988 SSL_COMP *comp; 1989 1990 if (cm == NULL || cm->type == NID_undef) 1991 return 1; 1992 1993 /*- 1994 * According to draft-ietf-tls-compression-04.txt, the 1995 * compression number ranges should be the following: 1996 * 1997 * 0 to 63: methods defined by the IETF 1998 * 64 to 192: external party methods assigned by IANA 1999 * 193 to 255: reserved for private use 2000 */ 2001 if (id < 193 || id > 255) { 2002 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD, 2003 SSL_R_COMPRESSION_ID_NOT_WITHIN_PRIVATE_RANGE); 2004 return 1; 2005 } 2006 2007 MemCheck_off(); 2008 comp = (SSL_COMP *)OPENSSL_malloc(sizeof(SSL_COMP)); 2009 if (comp == NULL) { 2010 MemCheck_on(); 2011 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD, ERR_R_MALLOC_FAILURE); 2012 return 1; 2013 } 2014 comp->id = id; 2015 comp->method = cm; 2016 comp->name = cm->name; 2017 load_builtin_compressions(); 2018 if (ssl_comp_methods && sk_SSL_COMP_find(ssl_comp_methods, comp) >= 0) { 2019 OPENSSL_free(comp); 2020 MemCheck_on(); 2021 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD, 2022 SSL_R_DUPLICATE_COMPRESSION_ID); 2023 return (1); 2024 } else if ((ssl_comp_methods == NULL) 2025 || !sk_SSL_COMP_push(ssl_comp_methods, comp)) { 2026 OPENSSL_free(comp); 2027 MemCheck_on(); 2028 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD, ERR_R_MALLOC_FAILURE); 2029 return (1); 2030 } else { 2031 MemCheck_on(); 2032 return (0); 2033 } 2034} 2035 2036const char *SSL_COMP_get_name(const COMP_METHOD *comp) 2037{ 2038 if (comp) 2039 return comp->name; 2040 return NULL; 2041} 2042#endif 2043/* For a cipher return the index corresponding to the certificate type */ 2044int ssl_cipher_get_cert_index(const SSL_CIPHER *c) 2045{ 2046 unsigned long alg_k, alg_a; 2047 2048 alg_k = c->algorithm_mkey; 2049 alg_a = c->algorithm_auth; 2050 2051 if (alg_k & (SSL_kECDHr | SSL_kECDHe)) { 2052 /* 2053 * we don't need to look at SSL_kEECDH since no certificate is needed 2054 * for anon ECDH and for authenticated EECDH, the check for the auth 2055 * algorithm will set i correctly NOTE: For ECDH-RSA, we need an ECC 2056 * not an RSA cert but for EECDH-RSA we need an RSA cert. Placing the 2057 * checks for SSL_kECDH before RSA checks ensures the correct cert is 2058 * chosen. 2059 */ 2060 return SSL_PKEY_ECC; 2061 } else if (alg_a & SSL_aECDSA) 2062 return SSL_PKEY_ECC; 2063 else if (alg_k & SSL_kDHr) 2064 return SSL_PKEY_DH_RSA; 2065 else if (alg_k & SSL_kDHd) 2066 return SSL_PKEY_DH_DSA; 2067 else if (alg_a & SSL_aDSS) 2068 return SSL_PKEY_DSA_SIGN; 2069 else if (alg_a & SSL_aRSA) 2070 return SSL_PKEY_RSA_ENC; 2071 else if (alg_a & SSL_aKRB5) 2072 /* VRS something else here? */ 2073 return -1; 2074 else if (alg_a & SSL_aGOST94) 2075 return SSL_PKEY_GOST94; 2076 else if (alg_a & SSL_aGOST01) 2077 return SSL_PKEY_GOST01; 2078 return -1; 2079} 2080 2081const SSL_CIPHER *ssl_get_cipher_by_char(SSL *ssl, const unsigned char *ptr) 2082{ 2083 const SSL_CIPHER *c; 2084 c = ssl->method->get_cipher_by_char(ptr); 2085 if (c == NULL || c->valid == 0) 2086 return NULL; 2087 return c; 2088} 2089 2090const SSL_CIPHER *SSL_CIPHER_find(SSL *ssl, const unsigned char *ptr) 2091{ 2092 return ssl->method->get_cipher_by_char(ptr); 2093} 2094