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