ssl_ciph.c revision 298999
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 /* no such ciphersuites supported! */ 248 {0, SSL_TXT_kDHr, 0, SSL_kDHr, 0, 0, 0, 0, 0, 0, 0, 0}, 249 /* no such ciphersuites supported! */ 250 {0, SSL_TXT_kDHd, 0, SSL_kDHd, 0, 0, 0, 0, 0, 0, 0, 0}, 251 /* no such ciphersuites supported! */ 252 {0, SSL_TXT_kDH, 0, SSL_kDHr | SSL_kDHd, 0, 0, 0, 0, 0, 0, 0, 0}, 253 {0, SSL_TXT_kEDH, 0, SSL_kEDH, 0, 0, 0, 0, 0, 0, 0, 0}, 254 {0, SSL_TXT_DH, 0, SSL_kDHr | SSL_kDHd | SSL_kEDH, 0, 0, 0, 0, 0, 0, 0, 255 0}, 256 257 {0, SSL_TXT_kKRB5, 0, SSL_kKRB5, 0, 0, 0, 0, 0, 0, 0, 0}, 258 259 {0, SSL_TXT_kECDHr, 0, SSL_kECDHr, 0, 0, 0, 0, 0, 0, 0, 0}, 260 {0, SSL_TXT_kECDHe, 0, SSL_kECDHe, 0, 0, 0, 0, 0, 0, 0, 0}, 261 {0, SSL_TXT_kECDH, 0, SSL_kECDHr | SSL_kECDHe, 0, 0, 0, 0, 0, 0, 0, 0}, 262 {0, SSL_TXT_kEECDH, 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_EECDH, 0, SSL_kEECDH, ~SSL_aNULL, 0, 0, 0, 0, 0, 0, 0}, 290 {0, SSL_TXT_NULL, 0, 0, 0, SSL_eNULL, 0, 0, 0, 0, 0, 0}, 291 {0, SSL_TXT_KRB5, 0, SSL_kKRB5, SSL_aKRB5, 0, 0, 0, 0, 0, 0, 0}, 292 {0, SSL_TXT_RSA, 0, SSL_kRSA, SSL_aRSA, 0, 0, 0, 0, 0, 0, 0}, 293 {0, SSL_TXT_ADH, 0, SSL_kEDH, SSL_aNULL, 0, 0, 0, 0, 0, 0, 0}, 294 {0, SSL_TXT_AECDH, 0, SSL_kEECDH, SSL_aNULL, 0, 0, 0, 0, 0, 0, 0}, 295 {0, SSL_TXT_PSK, 0, SSL_kPSK, SSL_aPSK, 0, 0, 0, 0, 0, 0, 0}, 296 {0, SSL_TXT_SRP, 0, SSL_kSRP, 0, 0, 0, 0, 0, 0, 0, 0}, 297 298 /* symmetric encryption aliases */ 299 {0, SSL_TXT_DES, 0, 0, 0, SSL_DES, 0, 0, 0, 0, 0, 0}, 300 {0, SSL_TXT_3DES, 0, 0, 0, SSL_3DES, 0, 0, 0, 0, 0, 0}, 301 {0, SSL_TXT_RC4, 0, 0, 0, SSL_RC4, 0, 0, 0, 0, 0, 0}, 302 {0, SSL_TXT_RC2, 0, 0, 0, SSL_RC2, 0, 0, 0, 0, 0, 0}, 303 {0, SSL_TXT_IDEA, 0, 0, 0, SSL_IDEA, 0, 0, 0, 0, 0, 0}, 304 {0, SSL_TXT_SEED, 0, 0, 0, SSL_SEED, 0, 0, 0, 0, 0, 0}, 305 {0, SSL_TXT_eNULL, 0, 0, 0, SSL_eNULL, 0, 0, 0, 0, 0, 0}, 306 {0, SSL_TXT_AES128, 0, 0, 0, SSL_AES128 | SSL_AES128GCM, 0, 0, 0, 0, 0, 307 0}, 308 {0, SSL_TXT_AES256, 0, 0, 0, SSL_AES256 | SSL_AES256GCM, 0, 0, 0, 0, 0, 309 0}, 310 {0, SSL_TXT_AES, 0, 0, 0, SSL_AES, 0, 0, 0, 0, 0, 0}, 311 {0, SSL_TXT_AES_GCM, 0, 0, 0, SSL_AES128GCM | SSL_AES256GCM, 0, 0, 0, 0, 312 0, 0}, 313 {0, SSL_TXT_CAMELLIA128, 0, 0, 0, SSL_CAMELLIA128, 0, 0, 0, 0, 0, 0}, 314 {0, SSL_TXT_CAMELLIA256, 0, 0, 0, SSL_CAMELLIA256, 0, 0, 0, 0, 0, 0}, 315 {0, SSL_TXT_CAMELLIA, 0, 0, 0, SSL_CAMELLIA128 | SSL_CAMELLIA256, 0, 0, 0, 316 0, 0, 0}, 317 318 /* MAC aliases */ 319 {0, SSL_TXT_MD5, 0, 0, 0, 0, SSL_MD5, 0, 0, 0, 0, 0}, 320 {0, SSL_TXT_SHA1, 0, 0, 0, 0, SSL_SHA1, 0, 0, 0, 0, 0}, 321 {0, SSL_TXT_SHA, 0, 0, 0, 0, SSL_SHA1, 0, 0, 0, 0, 0}, 322 {0, SSL_TXT_GOST94, 0, 0, 0, 0, SSL_GOST94, 0, 0, 0, 0, 0}, 323 {0, SSL_TXT_GOST89MAC, 0, 0, 0, 0, SSL_GOST89MAC, 0, 0, 0, 0, 0}, 324 {0, SSL_TXT_SHA256, 0, 0, 0, 0, SSL_SHA256, 0, 0, 0, 0, 0}, 325 {0, SSL_TXT_SHA384, 0, 0, 0, 0, SSL_SHA384, 0, 0, 0, 0, 0}, 326 327 /* protocol version aliases */ 328 {0, SSL_TXT_SSLV2, 0, 0, 0, 0, 0, SSL_SSLV2, 0, 0, 0, 0}, 329 {0, SSL_TXT_SSLV3, 0, 0, 0, 0, 0, SSL_SSLV3, 0, 0, 0, 0}, 330 {0, SSL_TXT_TLSV1, 0, 0, 0, 0, 0, SSL_TLSV1, 0, 0, 0, 0}, 331 {0, SSL_TXT_TLSV1_2, 0, 0, 0, 0, 0, SSL_TLSV1_2, 0, 0, 0, 0}, 332 333 /* export flag */ 334 {0, SSL_TXT_EXP, 0, 0, 0, 0, 0, 0, SSL_EXPORT, 0, 0, 0}, 335 {0, SSL_TXT_EXPORT, 0, 0, 0, 0, 0, 0, SSL_EXPORT, 0, 0, 0}, 336 337 /* strength classes */ 338 {0, SSL_TXT_EXP40, 0, 0, 0, 0, 0, 0, SSL_EXP40, 0, 0, 0}, 339 {0, SSL_TXT_EXP56, 0, 0, 0, 0, 0, 0, SSL_EXP56, 0, 0, 0}, 340 {0, SSL_TXT_LOW, 0, 0, 0, 0, 0, 0, SSL_LOW, 0, 0, 0}, 341 {0, SSL_TXT_MEDIUM, 0, 0, 0, 0, 0, 0, SSL_MEDIUM, 0, 0, 0}, 342 {0, SSL_TXT_HIGH, 0, 0, 0, 0, 0, 0, SSL_HIGH, 0, 0, 0}, 343 /* FIPS 140-2 approved ciphersuite */ 344 {0, SSL_TXT_FIPS, 0, 0, 0, ~SSL_eNULL, 0, 0, SSL_FIPS, 0, 0, 0}, 345}; 346 347/* 348 * Search for public key algorithm with given name and return its pkey_id if 349 * it is available. Otherwise return 0 350 */ 351#ifdef OPENSSL_NO_ENGINE 352 353static int get_optional_pkey_id(const char *pkey_name) 354{ 355 const EVP_PKEY_ASN1_METHOD *ameth; 356 int pkey_id = 0; 357 ameth = EVP_PKEY_asn1_find_str(NULL, pkey_name, -1); 358 if (ameth && EVP_PKEY_asn1_get0_info(&pkey_id, NULL, NULL, NULL, NULL, 359 ameth) > 0) { 360 return pkey_id; 361 } 362 return 0; 363} 364 365#else 366 367static int get_optional_pkey_id(const char *pkey_name) 368{ 369 const EVP_PKEY_ASN1_METHOD *ameth; 370 ENGINE *tmpeng = NULL; 371 int pkey_id = 0; 372 ameth = EVP_PKEY_asn1_find_str(&tmpeng, pkey_name, -1); 373 if (ameth) { 374 if (EVP_PKEY_asn1_get0_info(&pkey_id, NULL, NULL, NULL, NULL, 375 ameth) <= 0) 376 pkey_id = 0; 377 } 378 if (tmpeng) 379 ENGINE_finish(tmpeng); 380 return pkey_id; 381} 382 383#endif 384 385void ssl_load_ciphers(void) 386{ 387 ssl_cipher_methods[SSL_ENC_DES_IDX] = EVP_get_cipherbyname(SN_des_cbc); 388 ssl_cipher_methods[SSL_ENC_3DES_IDX] = 389 EVP_get_cipherbyname(SN_des_ede3_cbc); 390 ssl_cipher_methods[SSL_ENC_RC4_IDX] = EVP_get_cipherbyname(SN_rc4); 391 ssl_cipher_methods[SSL_ENC_RC2_IDX] = EVP_get_cipherbyname(SN_rc2_cbc); 392#ifndef OPENSSL_NO_IDEA 393 ssl_cipher_methods[SSL_ENC_IDEA_IDX] = EVP_get_cipherbyname(SN_idea_cbc); 394#else 395 ssl_cipher_methods[SSL_ENC_IDEA_IDX] = NULL; 396#endif 397 ssl_cipher_methods[SSL_ENC_AES128_IDX] = 398 EVP_get_cipherbyname(SN_aes_128_cbc); 399 ssl_cipher_methods[SSL_ENC_AES256_IDX] = 400 EVP_get_cipherbyname(SN_aes_256_cbc); 401 ssl_cipher_methods[SSL_ENC_CAMELLIA128_IDX] = 402 EVP_get_cipherbyname(SN_camellia_128_cbc); 403 ssl_cipher_methods[SSL_ENC_CAMELLIA256_IDX] = 404 EVP_get_cipherbyname(SN_camellia_256_cbc); 405 ssl_cipher_methods[SSL_ENC_GOST89_IDX] = 406 EVP_get_cipherbyname(SN_gost89_cnt); 407 ssl_cipher_methods[SSL_ENC_SEED_IDX] = EVP_get_cipherbyname(SN_seed_cbc); 408 409 ssl_cipher_methods[SSL_ENC_AES128GCM_IDX] = 410 EVP_get_cipherbyname(SN_aes_128_gcm); 411 ssl_cipher_methods[SSL_ENC_AES256GCM_IDX] = 412 EVP_get_cipherbyname(SN_aes_256_gcm); 413 414 ssl_digest_methods[SSL_MD_MD5_IDX] = EVP_get_digestbyname(SN_md5); 415 ssl_mac_secret_size[SSL_MD_MD5_IDX] = 416 EVP_MD_size(ssl_digest_methods[SSL_MD_MD5_IDX]); 417 OPENSSL_assert(ssl_mac_secret_size[SSL_MD_MD5_IDX] >= 0); 418 ssl_digest_methods[SSL_MD_SHA1_IDX] = EVP_get_digestbyname(SN_sha1); 419 ssl_mac_secret_size[SSL_MD_SHA1_IDX] = 420 EVP_MD_size(ssl_digest_methods[SSL_MD_SHA1_IDX]); 421 OPENSSL_assert(ssl_mac_secret_size[SSL_MD_SHA1_IDX] >= 0); 422 ssl_digest_methods[SSL_MD_GOST94_IDX] = 423 EVP_get_digestbyname(SN_id_GostR3411_94); 424 if (ssl_digest_methods[SSL_MD_GOST94_IDX]) { 425 ssl_mac_secret_size[SSL_MD_GOST94_IDX] = 426 EVP_MD_size(ssl_digest_methods[SSL_MD_GOST94_IDX]); 427 OPENSSL_assert(ssl_mac_secret_size[SSL_MD_GOST94_IDX] >= 0); 428 } 429 ssl_digest_methods[SSL_MD_GOST89MAC_IDX] = 430 EVP_get_digestbyname(SN_id_Gost28147_89_MAC); 431 ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX] = get_optional_pkey_id("gost-mac"); 432 if (ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX]) { 433 ssl_mac_secret_size[SSL_MD_GOST89MAC_IDX] = 32; 434 } 435 436 ssl_digest_methods[SSL_MD_SHA256_IDX] = EVP_get_digestbyname(SN_sha256); 437 ssl_mac_secret_size[SSL_MD_SHA256_IDX] = 438 EVP_MD_size(ssl_digest_methods[SSL_MD_SHA256_IDX]); 439 ssl_digest_methods[SSL_MD_SHA384_IDX] = EVP_get_digestbyname(SN_sha384); 440 ssl_mac_secret_size[SSL_MD_SHA384_IDX] = 441 EVP_MD_size(ssl_digest_methods[SSL_MD_SHA384_IDX]); 442} 443 444#ifndef OPENSSL_NO_COMP 445 446static int sk_comp_cmp(const SSL_COMP *const *a, const SSL_COMP *const *b) 447{ 448 return ((*a)->id - (*b)->id); 449} 450 451static void load_builtin_compressions(void) 452{ 453 int got_write_lock = 0; 454 455 CRYPTO_r_lock(CRYPTO_LOCK_SSL); 456 if (ssl_comp_methods == NULL) { 457 CRYPTO_r_unlock(CRYPTO_LOCK_SSL); 458 CRYPTO_w_lock(CRYPTO_LOCK_SSL); 459 got_write_lock = 1; 460 461 if (ssl_comp_methods == NULL) { 462 SSL_COMP *comp = NULL; 463 464 MemCheck_off(); 465 ssl_comp_methods = sk_SSL_COMP_new(sk_comp_cmp); 466 if (ssl_comp_methods != NULL) { 467 comp = (SSL_COMP *)OPENSSL_malloc(sizeof(SSL_COMP)); 468 if (comp != NULL) { 469 comp->method = COMP_zlib(); 470 if (comp->method && comp->method->type == NID_undef) 471 OPENSSL_free(comp); 472 else { 473 comp->id = SSL_COMP_ZLIB_IDX; 474 comp->name = comp->method->name; 475 sk_SSL_COMP_push(ssl_comp_methods, comp); 476 } 477 } 478 sk_SSL_COMP_sort(ssl_comp_methods); 479 } 480 MemCheck_on(); 481 } 482 } 483 484 if (got_write_lock) 485 CRYPTO_w_unlock(CRYPTO_LOCK_SSL); 486 else 487 CRYPTO_r_unlock(CRYPTO_LOCK_SSL); 488} 489#endif 490 491int ssl_cipher_get_evp(const SSL_SESSION *s, const EVP_CIPHER **enc, 492 const EVP_MD **md, int *mac_pkey_type, 493 int *mac_secret_size, SSL_COMP **comp) 494{ 495 int i; 496 const SSL_CIPHER *c; 497 498 c = s->cipher; 499 if (c == NULL) 500 return (0); 501 if (comp != NULL) { 502 SSL_COMP ctmp; 503#ifndef OPENSSL_NO_COMP 504 load_builtin_compressions(); 505#endif 506 507 *comp = NULL; 508 ctmp.id = s->compress_meth; 509 if (ssl_comp_methods != NULL) { 510 i = sk_SSL_COMP_find(ssl_comp_methods, &ctmp); 511 if (i >= 0) 512 *comp = sk_SSL_COMP_value(ssl_comp_methods, i); 513 else 514 *comp = NULL; 515 } 516 } 517 518 if ((enc == NULL) || (md == NULL)) 519 return (0); 520 521 switch (c->algorithm_enc) { 522 case SSL_DES: 523 i = SSL_ENC_DES_IDX; 524 break; 525 case SSL_3DES: 526 i = SSL_ENC_3DES_IDX; 527 break; 528 case SSL_RC4: 529 i = SSL_ENC_RC4_IDX; 530 break; 531 case SSL_RC2: 532 i = SSL_ENC_RC2_IDX; 533 break; 534 case SSL_IDEA: 535 i = SSL_ENC_IDEA_IDX; 536 break; 537 case SSL_eNULL: 538 i = SSL_ENC_NULL_IDX; 539 break; 540 case SSL_AES128: 541 i = SSL_ENC_AES128_IDX; 542 break; 543 case SSL_AES256: 544 i = SSL_ENC_AES256_IDX; 545 break; 546 case SSL_CAMELLIA128: 547 i = SSL_ENC_CAMELLIA128_IDX; 548 break; 549 case SSL_CAMELLIA256: 550 i = SSL_ENC_CAMELLIA256_IDX; 551 break; 552 case SSL_eGOST2814789CNT: 553 i = SSL_ENC_GOST89_IDX; 554 break; 555 case SSL_SEED: 556 i = SSL_ENC_SEED_IDX; 557 break; 558 case SSL_AES128GCM: 559 i = SSL_ENC_AES128GCM_IDX; 560 break; 561 case SSL_AES256GCM: 562 i = SSL_ENC_AES256GCM_IDX; 563 break; 564 default: 565 i = -1; 566 break; 567 } 568 569 if ((i < 0) || (i >= SSL_ENC_NUM_IDX)) 570 *enc = NULL; 571 else { 572 if (i == SSL_ENC_NULL_IDX) 573 *enc = EVP_enc_null(); 574 else 575 *enc = ssl_cipher_methods[i]; 576 } 577 578 switch (c->algorithm_mac) { 579 case SSL_MD5: 580 i = SSL_MD_MD5_IDX; 581 break; 582 case SSL_SHA1: 583 i = SSL_MD_SHA1_IDX; 584 break; 585 case SSL_SHA256: 586 i = SSL_MD_SHA256_IDX; 587 break; 588 case SSL_SHA384: 589 i = SSL_MD_SHA384_IDX; 590 break; 591 case SSL_GOST94: 592 i = SSL_MD_GOST94_IDX; 593 break; 594 case SSL_GOST89MAC: 595 i = SSL_MD_GOST89MAC_IDX; 596 break; 597 default: 598 i = -1; 599 break; 600 } 601 if ((i < 0) || (i >= SSL_MD_NUM_IDX)) { 602 *md = NULL; 603 if (mac_pkey_type != NULL) 604 *mac_pkey_type = NID_undef; 605 if (mac_secret_size != NULL) 606 *mac_secret_size = 0; 607 if (c->algorithm_mac == SSL_AEAD) 608 mac_pkey_type = NULL; 609 } else { 610 *md = ssl_digest_methods[i]; 611 if (mac_pkey_type != NULL) 612 *mac_pkey_type = ssl_mac_pkey_id[i]; 613 if (mac_secret_size != NULL) 614 *mac_secret_size = ssl_mac_secret_size[i]; 615 } 616 617 if ((*enc != NULL) && 618 (*md != NULL || (EVP_CIPHER_flags(*enc) & EVP_CIPH_FLAG_AEAD_CIPHER)) 619 && (!mac_pkey_type || *mac_pkey_type != NID_undef)) { 620 const EVP_CIPHER *evp; 621 622 if (s->ssl_version >> 8 != TLS1_VERSION_MAJOR || 623 s->ssl_version < TLS1_VERSION) 624 return 1; 625 626#ifdef OPENSSL_FIPS 627 if (FIPS_mode()) 628 return 1; 629#endif 630 631 if (c->algorithm_enc == SSL_RC4 && 632 c->algorithm_mac == SSL_MD5 && 633 (evp = EVP_get_cipherbyname("RC4-HMAC-MD5"))) 634 *enc = evp, *md = NULL; 635 else if (c->algorithm_enc == SSL_AES128 && 636 c->algorithm_mac == SSL_SHA1 && 637 (evp = EVP_get_cipherbyname("AES-128-CBC-HMAC-SHA1"))) 638 *enc = evp, *md = NULL; 639 else if (c->algorithm_enc == SSL_AES256 && 640 c->algorithm_mac == SSL_SHA1 && 641 (evp = EVP_get_cipherbyname("AES-256-CBC-HMAC-SHA1"))) 642 *enc = evp, *md = NULL; 643 return (1); 644 } else 645 return (0); 646} 647 648int ssl_get_handshake_digest(int idx, long *mask, const EVP_MD **md) 649{ 650 if (idx < 0 || idx >= SSL_MD_NUM_IDX) { 651 return 0; 652 } 653 *mask = ssl_handshake_digest_flag[idx]; 654 if (*mask) 655 *md = ssl_digest_methods[idx]; 656 else 657 *md = NULL; 658 return 1; 659} 660 661#define ITEM_SEP(a) \ 662 (((a) == ':') || ((a) == ' ') || ((a) == ';') || ((a) == ',')) 663 664static void ll_append_tail(CIPHER_ORDER **head, CIPHER_ORDER *curr, 665 CIPHER_ORDER **tail) 666{ 667 if (curr == *tail) 668 return; 669 if (curr == *head) 670 *head = curr->next; 671 if (curr->prev != NULL) 672 curr->prev->next = curr->next; 673 if (curr->next != NULL) 674 curr->next->prev = curr->prev; 675 (*tail)->next = curr; 676 curr->prev = *tail; 677 curr->next = NULL; 678 *tail = curr; 679} 680 681static void ll_append_head(CIPHER_ORDER **head, CIPHER_ORDER *curr, 682 CIPHER_ORDER **tail) 683{ 684 if (curr == *head) 685 return; 686 if (curr == *tail) 687 *tail = curr->prev; 688 if (curr->next != NULL) 689 curr->next->prev = curr->prev; 690 if (curr->prev != NULL) 691 curr->prev->next = curr->next; 692 (*head)->prev = curr; 693 curr->next = *head; 694 curr->prev = NULL; 695 *head = curr; 696} 697 698static void ssl_cipher_get_disabled(unsigned long *mkey, unsigned long *auth, 699 unsigned long *enc, unsigned long *mac, 700 unsigned long *ssl) 701{ 702 *mkey = 0; 703 *auth = 0; 704 *enc = 0; 705 *mac = 0; 706 *ssl = 0; 707 708#ifdef OPENSSL_NO_RSA 709 *mkey |= SSL_kRSA; 710 *auth |= SSL_aRSA; 711#endif 712#ifdef OPENSSL_NO_DSA 713 *auth |= SSL_aDSS; 714#endif 715 *mkey |= SSL_kDHr | SSL_kDHd; /* no such ciphersuites supported! */ 716 *auth |= SSL_aDH; 717#ifdef OPENSSL_NO_DH 718 *mkey |= SSL_kDHr | SSL_kDHd | SSL_kEDH; 719 *auth |= SSL_aDH; 720#endif 721#ifdef OPENSSL_NO_KRB5 722 *mkey |= SSL_kKRB5; 723 *auth |= SSL_aKRB5; 724#endif 725#ifdef OPENSSL_NO_ECDSA 726 *auth |= SSL_aECDSA; 727#endif 728#ifdef OPENSSL_NO_ECDH 729 *mkey |= SSL_kECDHe | SSL_kECDHr; 730 *auth |= SSL_aECDH; 731#endif 732#ifdef OPENSSL_NO_PSK 733 *mkey |= SSL_kPSK; 734 *auth |= SSL_aPSK; 735#endif 736#ifdef OPENSSL_NO_SRP 737 *mkey |= SSL_kSRP; 738#endif 739 /* 740 * Check for presence of GOST 34.10 algorithms, and if they do not 741 * present, disable appropriate auth and key exchange 742 */ 743 if (!get_optional_pkey_id("gost94")) { 744 *auth |= SSL_aGOST94; 745 } 746 if (!get_optional_pkey_id("gost2001")) { 747 *auth |= SSL_aGOST01; 748 } 749 /* 750 * Disable GOST key exchange if no GOST signature algs are available * 751 */ 752 if ((*auth & (SSL_aGOST94 | SSL_aGOST01)) == (SSL_aGOST94 | SSL_aGOST01)) { 753 *mkey |= SSL_kGOST; 754 } 755#ifdef SSL_FORBID_ENULL 756 *enc |= SSL_eNULL; 757#endif 758 759 *enc |= (ssl_cipher_methods[SSL_ENC_DES_IDX] == NULL) ? SSL_DES : 0; 760 *enc |= (ssl_cipher_methods[SSL_ENC_3DES_IDX] == NULL) ? SSL_3DES : 0; 761 *enc |= (ssl_cipher_methods[SSL_ENC_RC4_IDX] == NULL) ? SSL_RC4 : 0; 762 *enc |= (ssl_cipher_methods[SSL_ENC_RC2_IDX] == NULL) ? SSL_RC2 : 0; 763 *enc |= (ssl_cipher_methods[SSL_ENC_IDEA_IDX] == NULL) ? SSL_IDEA : 0; 764 *enc |= (ssl_cipher_methods[SSL_ENC_AES128_IDX] == NULL) ? SSL_AES128 : 0; 765 *enc |= (ssl_cipher_methods[SSL_ENC_AES256_IDX] == NULL) ? SSL_AES256 : 0; 766 *enc |= 767 (ssl_cipher_methods[SSL_ENC_AES128GCM_IDX] == 768 NULL) ? SSL_AES128GCM : 0; 769 *enc |= 770 (ssl_cipher_methods[SSL_ENC_AES256GCM_IDX] == 771 NULL) ? SSL_AES256GCM : 0; 772 *enc |= 773 (ssl_cipher_methods[SSL_ENC_CAMELLIA128_IDX] == 774 NULL) ? SSL_CAMELLIA128 : 0; 775 *enc |= 776 (ssl_cipher_methods[SSL_ENC_CAMELLIA256_IDX] == 777 NULL) ? SSL_CAMELLIA256 : 0; 778 *enc |= 779 (ssl_cipher_methods[SSL_ENC_GOST89_IDX] == 780 NULL) ? SSL_eGOST2814789CNT : 0; 781 *enc |= (ssl_cipher_methods[SSL_ENC_SEED_IDX] == NULL) ? SSL_SEED : 0; 782 783 *mac |= (ssl_digest_methods[SSL_MD_MD5_IDX] == NULL) ? SSL_MD5 : 0; 784 *mac |= (ssl_digest_methods[SSL_MD_SHA1_IDX] == NULL) ? SSL_SHA1 : 0; 785 *mac |= (ssl_digest_methods[SSL_MD_SHA256_IDX] == NULL) ? SSL_SHA256 : 0; 786 *mac |= (ssl_digest_methods[SSL_MD_SHA384_IDX] == NULL) ? SSL_SHA384 : 0; 787 *mac |= (ssl_digest_methods[SSL_MD_GOST94_IDX] == NULL) ? SSL_GOST94 : 0; 788 *mac |= (ssl_digest_methods[SSL_MD_GOST89MAC_IDX] == NULL 789 || ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX] == 790 NID_undef) ? SSL_GOST89MAC : 0; 791 792} 793 794static void ssl_cipher_collect_ciphers(const SSL_METHOD *ssl_method, 795 int num_of_ciphers, 796 unsigned long disabled_mkey, 797 unsigned long disabled_auth, 798 unsigned long disabled_enc, 799 unsigned long disabled_mac, 800 unsigned long disabled_ssl, 801 CIPHER_ORDER *co_list, 802 CIPHER_ORDER **head_p, 803 CIPHER_ORDER **tail_p) 804{ 805 int i, co_list_num; 806 const SSL_CIPHER *c; 807 808 /* 809 * We have num_of_ciphers descriptions compiled in, depending on the 810 * method selected (SSLv2 and/or SSLv3, TLSv1 etc). 811 * These will later be sorted in a linked list with at most num 812 * entries. 813 */ 814 815 /* Get the initial list of ciphers */ 816 co_list_num = 0; /* actual count of ciphers */ 817 for (i = 0; i < num_of_ciphers; i++) { 818 c = ssl_method->get_cipher(i); 819 /* drop those that use any of that is not available */ 820 if ((c != NULL) && c->valid && 821#ifdef OPENSSL_FIPS 822 (!FIPS_mode() || (c->algo_strength & SSL_FIPS)) && 823#endif 824 !(c->algorithm_mkey & disabled_mkey) && 825 !(c->algorithm_auth & disabled_auth) && 826 !(c->algorithm_enc & disabled_enc) && 827 !(c->algorithm_mac & disabled_mac) && 828 !(c->algorithm_ssl & disabled_ssl)) { 829 co_list[co_list_num].cipher = c; 830 co_list[co_list_num].next = NULL; 831 co_list[co_list_num].prev = NULL; 832 co_list[co_list_num].active = 0; 833 co_list_num++; 834#ifdef KSSL_DEBUG 835 fprintf(stderr, "\t%d: %s %lx %lx %lx\n", i, c->name, c->id, 836 c->algorithm_mkey, c->algorithm_auth); 837#endif /* KSSL_DEBUG */ 838 /* 839 * if (!sk_push(ca_list,(char *)c)) goto err; 840 */ 841 } 842 } 843 844 /* 845 * Prepare linked list from list entries 846 */ 847 if (co_list_num > 0) { 848 co_list[0].prev = NULL; 849 850 if (co_list_num > 1) { 851 co_list[0].next = &co_list[1]; 852 853 for (i = 1; i < co_list_num - 1; i++) { 854 co_list[i].prev = &co_list[i - 1]; 855 co_list[i].next = &co_list[i + 1]; 856 } 857 858 co_list[co_list_num - 1].prev = &co_list[co_list_num - 2]; 859 } 860 861 co_list[co_list_num - 1].next = NULL; 862 863 *head_p = &co_list[0]; 864 *tail_p = &co_list[co_list_num - 1]; 865 } 866} 867 868static void ssl_cipher_collect_aliases(const SSL_CIPHER **ca_list, 869 int num_of_group_aliases, 870 unsigned long disabled_mkey, 871 unsigned long disabled_auth, 872 unsigned long disabled_enc, 873 unsigned long disabled_mac, 874 unsigned long disabled_ssl, 875 CIPHER_ORDER *head) 876{ 877 CIPHER_ORDER *ciph_curr; 878 const SSL_CIPHER **ca_curr; 879 int i; 880 unsigned long mask_mkey = ~disabled_mkey; 881 unsigned long mask_auth = ~disabled_auth; 882 unsigned long mask_enc = ~disabled_enc; 883 unsigned long mask_mac = ~disabled_mac; 884 unsigned long mask_ssl = ~disabled_ssl; 885 886 /* 887 * First, add the real ciphers as already collected 888 */ 889 ciph_curr = head; 890 ca_curr = ca_list; 891 while (ciph_curr != NULL) { 892 *ca_curr = ciph_curr->cipher; 893 ca_curr++; 894 ciph_curr = ciph_curr->next; 895 } 896 897 /* 898 * Now we add the available ones from the cipher_aliases[] table. 899 * They represent either one or more algorithms, some of which 900 * in any affected category must be supported (set in enabled_mask), 901 * or represent a cipher strength value (will be added in any case because algorithms=0). 902 */ 903 for (i = 0; i < num_of_group_aliases; i++) { 904 unsigned long algorithm_mkey = cipher_aliases[i].algorithm_mkey; 905 unsigned long algorithm_auth = cipher_aliases[i].algorithm_auth; 906 unsigned long algorithm_enc = cipher_aliases[i].algorithm_enc; 907 unsigned long algorithm_mac = cipher_aliases[i].algorithm_mac; 908 unsigned long algorithm_ssl = cipher_aliases[i].algorithm_ssl; 909 910 if (algorithm_mkey) 911 if ((algorithm_mkey & mask_mkey) == 0) 912 continue; 913 914 if (algorithm_auth) 915 if ((algorithm_auth & mask_auth) == 0) 916 continue; 917 918 if (algorithm_enc) 919 if ((algorithm_enc & mask_enc) == 0) 920 continue; 921 922 if (algorithm_mac) 923 if ((algorithm_mac & mask_mac) == 0) 924 continue; 925 926 if (algorithm_ssl) 927 if ((algorithm_ssl & mask_ssl) == 0) 928 continue; 929 930 *ca_curr = (SSL_CIPHER *)(cipher_aliases + i); 931 ca_curr++; 932 } 933 934 *ca_curr = NULL; /* end of list */ 935} 936 937static void ssl_cipher_apply_rule(unsigned long cipher_id, 938 unsigned long alg_mkey, 939 unsigned long alg_auth, 940 unsigned long alg_enc, 941 unsigned long alg_mac, 942 unsigned long alg_ssl, 943 unsigned long algo_strength, int rule, 944 int strength_bits, CIPHER_ORDER **head_p, 945 CIPHER_ORDER **tail_p) 946{ 947 CIPHER_ORDER *head, *tail, *curr, *next, *last; 948 const SSL_CIPHER *cp; 949 int reverse = 0; 950 951#ifdef CIPHER_DEBUG 952 fprintf(stderr, 953 "Applying rule %d with %08lx/%08lx/%08lx/%08lx/%08lx %08lx (%d)\n", 954 rule, alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl, 955 algo_strength, strength_bits); 956#endif 957 958 if (rule == CIPHER_DEL) 959 reverse = 1; /* needed to maintain sorting between 960 * currently deleted ciphers */ 961 962 head = *head_p; 963 tail = *tail_p; 964 965 if (reverse) { 966 next = tail; 967 last = head; 968 } else { 969 next = head; 970 last = tail; 971 } 972 973 curr = NULL; 974 for (;;) { 975 if (curr == last) 976 break; 977 978 curr = next; 979 980 if (curr == NULL) 981 break; 982 983 next = reverse ? curr->prev : curr->next; 984 985 cp = curr->cipher; 986 987 /* 988 * Selection criteria is either the value of strength_bits 989 * or the algorithms used. 990 */ 991 if (strength_bits >= 0) { 992 if (strength_bits != cp->strength_bits) 993 continue; 994 } else { 995#ifdef CIPHER_DEBUG 996 fprintf(stderr, 997 "\nName: %s:\nAlgo = %08lx/%08lx/%08lx/%08lx/%08lx Algo_strength = %08lx\n", 998 cp->name, cp->algorithm_mkey, cp->algorithm_auth, 999 cp->algorithm_enc, cp->algorithm_mac, cp->algorithm_ssl, 1000 cp->algo_strength); 1001#endif 1002 if (alg_mkey && !(alg_mkey & cp->algorithm_mkey)) 1003 continue; 1004 if (alg_auth && !(alg_auth & cp->algorithm_auth)) 1005 continue; 1006 if (alg_enc && !(alg_enc & cp->algorithm_enc)) 1007 continue; 1008 if (alg_mac && !(alg_mac & cp->algorithm_mac)) 1009 continue; 1010 if (alg_ssl && !(alg_ssl & cp->algorithm_ssl)) 1011 continue; 1012 if ((algo_strength & SSL_EXP_MASK) 1013 && !(algo_strength & SSL_EXP_MASK & cp->algo_strength)) 1014 continue; 1015 if ((algo_strength & SSL_STRONG_MASK) 1016 && !(algo_strength & SSL_STRONG_MASK & cp->algo_strength)) 1017 continue; 1018 if ((algo_strength & SSL_NOT_DEFAULT) 1019 && !(cp->algo_strength & SSL_NOT_DEFAULT)) 1020 continue; 1021 } 1022 1023#ifdef CIPHER_DEBUG 1024 fprintf(stderr, "Action = %d\n", rule); 1025#endif 1026 1027 /* add the cipher if it has not been added yet. */ 1028 if (rule == CIPHER_ADD) { 1029 /* reverse == 0 */ 1030 if (!curr->active) { 1031 ll_append_tail(&head, curr, &tail); 1032 curr->active = 1; 1033 } 1034 } 1035 /* Move the added cipher to this location */ 1036 else if (rule == CIPHER_ORD) { 1037 /* reverse == 0 */ 1038 if (curr->active) { 1039 ll_append_tail(&head, curr, &tail); 1040 } 1041 } else if (rule == CIPHER_DEL) { 1042 /* reverse == 1 */ 1043 if (curr->active) { 1044 /* 1045 * most recently deleted ciphersuites get best positions for 1046 * any future CIPHER_ADD (note that the CIPHER_DEL loop works 1047 * in reverse to maintain the order) 1048 */ 1049 ll_append_head(&head, curr, &tail); 1050 curr->active = 0; 1051 } 1052 } else if (rule == CIPHER_KILL) { 1053 /* reverse == 0 */ 1054 if (head == curr) 1055 head = curr->next; 1056 else 1057 curr->prev->next = curr->next; 1058 if (tail == curr) 1059 tail = curr->prev; 1060 curr->active = 0; 1061 if (curr->next != NULL) 1062 curr->next->prev = curr->prev; 1063 if (curr->prev != NULL) 1064 curr->prev->next = curr->next; 1065 curr->next = NULL; 1066 curr->prev = NULL; 1067 } 1068 } 1069 1070 *head_p = head; 1071 *tail_p = tail; 1072} 1073 1074static int ssl_cipher_strength_sort(CIPHER_ORDER **head_p, 1075 CIPHER_ORDER **tail_p) 1076{ 1077 int max_strength_bits, i, *number_uses; 1078 CIPHER_ORDER *curr; 1079 1080 /* 1081 * This routine sorts the ciphers with descending strength. The sorting 1082 * must keep the pre-sorted sequence, so we apply the normal sorting 1083 * routine as '+' movement to the end of the list. 1084 */ 1085 max_strength_bits = 0; 1086 curr = *head_p; 1087 while (curr != NULL) { 1088 if (curr->active && (curr->cipher->strength_bits > max_strength_bits)) 1089 max_strength_bits = curr->cipher->strength_bits; 1090 curr = curr->next; 1091 } 1092 1093 number_uses = OPENSSL_malloc((max_strength_bits + 1) * sizeof(int)); 1094 if (!number_uses) { 1095 SSLerr(SSL_F_SSL_CIPHER_STRENGTH_SORT, ERR_R_MALLOC_FAILURE); 1096 return (0); 1097 } 1098 memset(number_uses, 0, (max_strength_bits + 1) * sizeof(int)); 1099 1100 /* 1101 * Now find the strength_bits values actually used 1102 */ 1103 curr = *head_p; 1104 while (curr != NULL) { 1105 if (curr->active) 1106 number_uses[curr->cipher->strength_bits]++; 1107 curr = curr->next; 1108 } 1109 /* 1110 * Go through the list of used strength_bits values in descending 1111 * order. 1112 */ 1113 for (i = max_strength_bits; i >= 0; i--) 1114 if (number_uses[i] > 0) 1115 ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_ORD, i, head_p, 1116 tail_p); 1117 1118 OPENSSL_free(number_uses); 1119 return (1); 1120} 1121 1122static int ssl_cipher_process_rulestr(const char *rule_str, 1123 CIPHER_ORDER **head_p, 1124 CIPHER_ORDER **tail_p, 1125 const SSL_CIPHER **ca_list) 1126{ 1127 unsigned long alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl, 1128 algo_strength; 1129 const char *l, *buf; 1130 int j, multi, found, rule, retval, ok, buflen; 1131 unsigned long cipher_id = 0; 1132 char ch; 1133 1134 retval = 1; 1135 l = rule_str; 1136 for (;;) { 1137 ch = *l; 1138 1139 if (ch == '\0') 1140 break; /* done */ 1141 if (ch == '-') { 1142 rule = CIPHER_DEL; 1143 l++; 1144 } else if (ch == '+') { 1145 rule = CIPHER_ORD; 1146 l++; 1147 } else if (ch == '!') { 1148 rule = CIPHER_KILL; 1149 l++; 1150 } else if (ch == '@') { 1151 rule = CIPHER_SPECIAL; 1152 l++; 1153 } else { 1154 rule = CIPHER_ADD; 1155 } 1156 1157 if (ITEM_SEP(ch)) { 1158 l++; 1159 continue; 1160 } 1161 1162 alg_mkey = 0; 1163 alg_auth = 0; 1164 alg_enc = 0; 1165 alg_mac = 0; 1166 alg_ssl = 0; 1167 algo_strength = 0; 1168 1169 for (;;) { 1170 ch = *l; 1171 buf = l; 1172 buflen = 0; 1173#ifndef CHARSET_EBCDIC 1174 while (((ch >= 'A') && (ch <= 'Z')) || 1175 ((ch >= '0') && (ch <= '9')) || 1176 ((ch >= 'a') && (ch <= 'z')) || (ch == '-') || (ch == '.')) 1177#else 1178 while (isalnum(ch) || (ch == '-') || (ch == '.')) 1179#endif 1180 { 1181 ch = *(++l); 1182 buflen++; 1183 } 1184 1185 if (buflen == 0) { 1186 /* 1187 * We hit something we cannot deal with, 1188 * it is no command or separator nor 1189 * alphanumeric, so we call this an error. 1190 */ 1191 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR, 1192 SSL_R_INVALID_COMMAND); 1193 retval = found = 0; 1194 l++; 1195 break; 1196 } 1197 1198 if (rule == CIPHER_SPECIAL) { 1199 found = 0; /* unused -- avoid compiler warning */ 1200 break; /* special treatment */ 1201 } 1202 1203 /* check for multi-part specification */ 1204 if (ch == '+') { 1205 multi = 1; 1206 l++; 1207 } else 1208 multi = 0; 1209 1210 /* 1211 * Now search for the cipher alias in the ca_list. Be careful 1212 * with the strncmp, because the "buflen" limitation 1213 * will make the rule "ADH:SOME" and the cipher 1214 * "ADH-MY-CIPHER" look like a match for buflen=3. 1215 * So additionally check whether the cipher name found 1216 * has the correct length. We can save a strlen() call: 1217 * just checking for the '\0' at the right place is 1218 * sufficient, we have to strncmp() anyway. (We cannot 1219 * use strcmp(), because buf is not '\0' terminated.) 1220 */ 1221 j = found = 0; 1222 cipher_id = 0; 1223 while (ca_list[j]) { 1224 if (!strncmp(buf, ca_list[j]->name, buflen) && 1225 (ca_list[j]->name[buflen] == '\0')) { 1226 found = 1; 1227 break; 1228 } else 1229 j++; 1230 } 1231 1232 if (!found) 1233 break; /* ignore this entry */ 1234 1235 if (ca_list[j]->algorithm_mkey) { 1236 if (alg_mkey) { 1237 alg_mkey &= ca_list[j]->algorithm_mkey; 1238 if (!alg_mkey) { 1239 found = 0; 1240 break; 1241 } 1242 } else 1243 alg_mkey = ca_list[j]->algorithm_mkey; 1244 } 1245 1246 if (ca_list[j]->algorithm_auth) { 1247 if (alg_auth) { 1248 alg_auth &= ca_list[j]->algorithm_auth; 1249 if (!alg_auth) { 1250 found = 0; 1251 break; 1252 } 1253 } else 1254 alg_auth = ca_list[j]->algorithm_auth; 1255 } 1256 1257 if (ca_list[j]->algorithm_enc) { 1258 if (alg_enc) { 1259 alg_enc &= ca_list[j]->algorithm_enc; 1260 if (!alg_enc) { 1261 found = 0; 1262 break; 1263 } 1264 } else 1265 alg_enc = ca_list[j]->algorithm_enc; 1266 } 1267 1268 if (ca_list[j]->algorithm_mac) { 1269 if (alg_mac) { 1270 alg_mac &= ca_list[j]->algorithm_mac; 1271 if (!alg_mac) { 1272 found = 0; 1273 break; 1274 } 1275 } else 1276 alg_mac = ca_list[j]->algorithm_mac; 1277 } 1278 1279 if (ca_list[j]->algo_strength & SSL_EXP_MASK) { 1280 if (algo_strength & SSL_EXP_MASK) { 1281 algo_strength &= 1282 (ca_list[j]->algo_strength & SSL_EXP_MASK) | 1283 ~SSL_EXP_MASK; 1284 if (!(algo_strength & SSL_EXP_MASK)) { 1285 found = 0; 1286 break; 1287 } 1288 } else 1289 algo_strength |= ca_list[j]->algo_strength & SSL_EXP_MASK; 1290 } 1291 1292 if (ca_list[j]->algo_strength & SSL_STRONG_MASK) { 1293 if (algo_strength & SSL_STRONG_MASK) { 1294 algo_strength &= 1295 (ca_list[j]->algo_strength & SSL_STRONG_MASK) | 1296 ~SSL_STRONG_MASK; 1297 if (!(algo_strength & SSL_STRONG_MASK)) { 1298 found = 0; 1299 break; 1300 } 1301 } else 1302 algo_strength |= 1303 ca_list[j]->algo_strength & SSL_STRONG_MASK; 1304 } 1305 1306 if (ca_list[j]->algo_strength & SSL_NOT_DEFAULT) { 1307 algo_strength |= SSL_NOT_DEFAULT; 1308 } 1309 1310 if (ca_list[j]->valid) { 1311 /* 1312 * explicit ciphersuite found; its protocol version does not 1313 * become part of the search pattern! 1314 */ 1315 1316 cipher_id = ca_list[j]->id; 1317 } else { 1318 /* 1319 * not an explicit ciphersuite; only in this case, the 1320 * protocol version is considered part of the search pattern 1321 */ 1322 1323 if (ca_list[j]->algorithm_ssl) { 1324 if (alg_ssl) { 1325 alg_ssl &= ca_list[j]->algorithm_ssl; 1326 if (!alg_ssl) { 1327 found = 0; 1328 break; 1329 } 1330 } else 1331 alg_ssl = ca_list[j]->algorithm_ssl; 1332 } 1333 } 1334 1335 if (!multi) 1336 break; 1337 } 1338 1339 /* 1340 * Ok, we have the rule, now apply it 1341 */ 1342 if (rule == CIPHER_SPECIAL) { /* special command */ 1343 ok = 0; 1344 if ((buflen == 8) && !strncmp(buf, "STRENGTH", 8)) 1345 ok = ssl_cipher_strength_sort(head_p, tail_p); 1346 else 1347 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR, 1348 SSL_R_INVALID_COMMAND); 1349 if (ok == 0) 1350 retval = 0; 1351 /* 1352 * We do not support any "multi" options 1353 * together with "@", so throw away the 1354 * rest of the command, if any left, until 1355 * end or ':' is found. 1356 */ 1357 while ((*l != '\0') && !ITEM_SEP(*l)) 1358 l++; 1359 } else if (found) { 1360 ssl_cipher_apply_rule(cipher_id, 1361 alg_mkey, alg_auth, alg_enc, alg_mac, 1362 alg_ssl, algo_strength, rule, -1, head_p, 1363 tail_p); 1364 } else { 1365 while ((*l != '\0') && !ITEM_SEP(*l)) 1366 l++; 1367 } 1368 if (*l == '\0') 1369 break; /* done */ 1370 } 1371 1372 return (retval); 1373} 1374 1375STACK_OF(SSL_CIPHER) *ssl_create_cipher_list(const SSL_METHOD *ssl_method, STACK_OF(SSL_CIPHER) 1376 **cipher_list, STACK_OF(SSL_CIPHER) 1377 **cipher_list_by_id, 1378 const char *rule_str) 1379{ 1380 int ok, num_of_ciphers, num_of_alias_max, num_of_group_aliases; 1381 unsigned long disabled_mkey, disabled_auth, disabled_enc, disabled_mac, 1382 disabled_ssl; 1383 STACK_OF(SSL_CIPHER) *cipherstack, *tmp_cipher_list; 1384 const char *rule_p; 1385 CIPHER_ORDER *co_list = NULL, *head = NULL, *tail = NULL, *curr; 1386 const SSL_CIPHER **ca_list = NULL; 1387 1388 /* 1389 * Return with error if nothing to do. 1390 */ 1391 if (rule_str == NULL || cipher_list == NULL || cipher_list_by_id == NULL) 1392 return NULL; 1393 1394 /* 1395 * To reduce the work to do we only want to process the compiled 1396 * in algorithms, so we first get the mask of disabled ciphers. 1397 */ 1398 ssl_cipher_get_disabled(&disabled_mkey, &disabled_auth, &disabled_enc, 1399 &disabled_mac, &disabled_ssl); 1400 1401 /* 1402 * Now we have to collect the available ciphers from the compiled 1403 * in ciphers. We cannot get more than the number compiled in, so 1404 * it is used for allocation. 1405 */ 1406 num_of_ciphers = ssl_method->num_ciphers(); 1407#ifdef KSSL_DEBUG 1408 fprintf(stderr, "ssl_create_cipher_list() for %d ciphers\n", 1409 num_of_ciphers); 1410#endif /* KSSL_DEBUG */ 1411 co_list = 1412 (CIPHER_ORDER *)OPENSSL_malloc(sizeof(CIPHER_ORDER) * num_of_ciphers); 1413 if (co_list == NULL) { 1414 SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST, ERR_R_MALLOC_FAILURE); 1415 return (NULL); /* Failure */ 1416 } 1417 1418 ssl_cipher_collect_ciphers(ssl_method, num_of_ciphers, 1419 disabled_mkey, disabled_auth, disabled_enc, 1420 disabled_mac, disabled_ssl, co_list, &head, 1421 &tail); 1422 1423 /* Now arrange all ciphers by preference: */ 1424 1425 /* 1426 * Everything else being equal, prefer ephemeral ECDH over other key 1427 * exchange mechanisms 1428 */ 1429 ssl_cipher_apply_rule(0, SSL_kEECDH, 0, 0, 0, 0, 0, CIPHER_ADD, -1, &head, 1430 &tail); 1431 ssl_cipher_apply_rule(0, SSL_kEECDH, 0, 0, 0, 0, 0, CIPHER_DEL, -1, &head, 1432 &tail); 1433 1434 /* AES is our preferred symmetric cipher */ 1435 ssl_cipher_apply_rule(0, 0, 0, SSL_AES, 0, 0, 0, CIPHER_ADD, -1, &head, 1436 &tail); 1437 1438 /* Temporarily enable everything else for sorting */ 1439 ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_ADD, -1, &head, &tail); 1440 1441 /* Low priority for MD5 */ 1442 ssl_cipher_apply_rule(0, 0, 0, 0, SSL_MD5, 0, 0, CIPHER_ORD, -1, &head, 1443 &tail); 1444 1445 /* 1446 * Move anonymous ciphers to the end. Usually, these will remain 1447 * disabled. (For applications that allow them, they aren't too bad, but 1448 * we prefer authenticated ciphers.) 1449 */ 1450 ssl_cipher_apply_rule(0, 0, SSL_aNULL, 0, 0, 0, 0, CIPHER_ORD, -1, &head, 1451 &tail); 1452 1453 /* Move ciphers without forward secrecy to the end */ 1454 ssl_cipher_apply_rule(0, 0, SSL_aECDH, 0, 0, 0, 0, CIPHER_ORD, -1, &head, 1455 &tail); 1456 /* 1457 * ssl_cipher_apply_rule(0, 0, SSL_aDH, 0, 0, 0, 0, CIPHER_ORD, -1, 1458 * &head, &tail); 1459 */ 1460 ssl_cipher_apply_rule(0, SSL_kRSA, 0, 0, 0, 0, 0, CIPHER_ORD, -1, &head, 1461 &tail); 1462 ssl_cipher_apply_rule(0, SSL_kPSK, 0, 0, 0, 0, 0, CIPHER_ORD, -1, &head, 1463 &tail); 1464 ssl_cipher_apply_rule(0, SSL_kKRB5, 0, 0, 0, 0, 0, CIPHER_ORD, -1, &head, 1465 &tail); 1466 1467 /* RC4 is sort-of broken -- move the the end */ 1468 ssl_cipher_apply_rule(0, 0, 0, SSL_RC4, 0, 0, 0, CIPHER_ORD, -1, &head, 1469 &tail); 1470 1471 /* 1472 * Now sort by symmetric encryption strength. The above ordering remains 1473 * in force within each class 1474 */ 1475 if (!ssl_cipher_strength_sort(&head, &tail)) { 1476 OPENSSL_free(co_list); 1477 return NULL; 1478 } 1479 1480 /* Now disable everything (maintaining the ordering!) */ 1481 ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_DEL, -1, &head, &tail); 1482 1483 /* 1484 * We also need cipher aliases for selecting based on the rule_str. 1485 * There might be two types of entries in the rule_str: 1) names 1486 * of ciphers themselves 2) aliases for groups of ciphers. 1487 * For 1) we need the available ciphers and for 2) the cipher 1488 * groups of cipher_aliases added together in one list (otherwise 1489 * we would be happy with just the cipher_aliases table). 1490 */ 1491 num_of_group_aliases = sizeof(cipher_aliases) / sizeof(SSL_CIPHER); 1492 num_of_alias_max = num_of_ciphers + num_of_group_aliases + 1; 1493 ca_list = OPENSSL_malloc(sizeof(SSL_CIPHER *) * num_of_alias_max); 1494 if (ca_list == NULL) { 1495 OPENSSL_free(co_list); 1496 SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST, ERR_R_MALLOC_FAILURE); 1497 return (NULL); /* Failure */ 1498 } 1499 ssl_cipher_collect_aliases(ca_list, num_of_group_aliases, 1500 disabled_mkey, disabled_auth, disabled_enc, 1501 disabled_mac, disabled_ssl, head); 1502 1503 /* 1504 * If the rule_string begins with DEFAULT, apply the default rule 1505 * before using the (possibly available) additional rules. 1506 */ 1507 ok = 1; 1508 rule_p = rule_str; 1509 if (strncmp(rule_str, "DEFAULT", 7) == 0) { 1510 ok = ssl_cipher_process_rulestr(SSL_DEFAULT_CIPHER_LIST, 1511 &head, &tail, ca_list); 1512 rule_p += 7; 1513 if (*rule_p == ':') 1514 rule_p++; 1515 } 1516 1517 if (ok && (strlen(rule_p) > 0)) 1518 ok = ssl_cipher_process_rulestr(rule_p, &head, &tail, ca_list); 1519 1520 OPENSSL_free((void *)ca_list); /* Not needed anymore */ 1521 1522 if (!ok) { /* Rule processing failure */ 1523 OPENSSL_free(co_list); 1524 return (NULL); 1525 } 1526 1527 /* 1528 * Allocate new "cipherstack" for the result, return with error 1529 * if we cannot get one. 1530 */ 1531 if ((cipherstack = sk_SSL_CIPHER_new_null()) == NULL) { 1532 OPENSSL_free(co_list); 1533 return (NULL); 1534 } 1535 1536 /* 1537 * The cipher selection for the list is done. The ciphers are added 1538 * to the resulting precedence to the STACK_OF(SSL_CIPHER). 1539 */ 1540 for (curr = head; curr != NULL; curr = curr->next) { 1541#ifdef OPENSSL_FIPS 1542 if (curr->active 1543 && (!FIPS_mode() || curr->cipher->algo_strength & SSL_FIPS)) 1544#else 1545 if (curr->active) 1546#endif 1547 { 1548 sk_SSL_CIPHER_push(cipherstack, curr->cipher); 1549#ifdef CIPHER_DEBUG 1550 fprintf(stderr, "<%s>\n", curr->cipher->name); 1551#endif 1552 } 1553 } 1554 OPENSSL_free(co_list); /* Not needed any longer */ 1555 1556 tmp_cipher_list = sk_SSL_CIPHER_dup(cipherstack); 1557 if (tmp_cipher_list == NULL) { 1558 sk_SSL_CIPHER_free(cipherstack); 1559 return NULL; 1560 } 1561 if (*cipher_list != NULL) 1562 sk_SSL_CIPHER_free(*cipher_list); 1563 *cipher_list = cipherstack; 1564 if (*cipher_list_by_id != NULL) 1565 sk_SSL_CIPHER_free(*cipher_list_by_id); 1566 *cipher_list_by_id = tmp_cipher_list; 1567 (void)sk_SSL_CIPHER_set_cmp_func(*cipher_list_by_id, 1568 ssl_cipher_ptr_id_cmp); 1569 1570 sk_SSL_CIPHER_sort(*cipher_list_by_id); 1571 return (cipherstack); 1572} 1573 1574char *SSL_CIPHER_description(const SSL_CIPHER *cipher, char *buf, int len) 1575{ 1576 int is_export, pkl, kl; 1577 const char *ver, *exp_str; 1578 const char *kx, *au, *enc, *mac; 1579 unsigned long alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl, alg2; 1580#ifdef KSSL_DEBUG 1581 static const char *format = 1582 "%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s%s AL=%lx/%lx/%lx/%lx/%lx\n"; 1583#else 1584 static const char *format = 1585 "%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s%s\n"; 1586#endif /* KSSL_DEBUG */ 1587 1588 alg_mkey = cipher->algorithm_mkey; 1589 alg_auth = cipher->algorithm_auth; 1590 alg_enc = cipher->algorithm_enc; 1591 alg_mac = cipher->algorithm_mac; 1592 alg_ssl = cipher->algorithm_ssl; 1593 1594 alg2 = cipher->algorithm2; 1595 1596 is_export = SSL_C_IS_EXPORT(cipher); 1597 pkl = SSL_C_EXPORT_PKEYLENGTH(cipher); 1598 kl = SSL_C_EXPORT_KEYLENGTH(cipher); 1599 exp_str = is_export ? " export" : ""; 1600 1601 if (alg_ssl & SSL_SSLV2) 1602 ver = "SSLv2"; 1603 else if (alg_ssl & SSL_SSLV3) 1604 ver = "SSLv3"; 1605 else if (alg_ssl & SSL_TLSV1_2) 1606 ver = "TLSv1.2"; 1607 else 1608 ver = "unknown"; 1609 1610 switch (alg_mkey) { 1611 case SSL_kRSA: 1612 kx = is_export ? (pkl == 512 ? "RSA(512)" : "RSA(1024)") : "RSA"; 1613 break; 1614 case SSL_kDHr: 1615 kx = "DH/RSA"; 1616 break; 1617 case SSL_kDHd: 1618 kx = "DH/DSS"; 1619 break; 1620 case SSL_kKRB5: 1621 kx = "KRB5"; 1622 break; 1623 case SSL_kEDH: 1624 kx = is_export ? (pkl == 512 ? "DH(512)" : "DH(1024)") : "DH"; 1625 break; 1626 case SSL_kECDHr: 1627 kx = "ECDH/RSA"; 1628 break; 1629 case SSL_kECDHe: 1630 kx = "ECDH/ECDSA"; 1631 break; 1632 case SSL_kEECDH: 1633 kx = "ECDH"; 1634 break; 1635 case SSL_kPSK: 1636 kx = "PSK"; 1637 break; 1638 case SSL_kSRP: 1639 kx = "SRP"; 1640 break; 1641 case SSL_kGOST: 1642 kx = "GOST"; 1643 break; 1644 default: 1645 kx = "unknown"; 1646 } 1647 1648 switch (alg_auth) { 1649 case SSL_aRSA: 1650 au = "RSA"; 1651 break; 1652 case SSL_aDSS: 1653 au = "DSS"; 1654 break; 1655 case SSL_aDH: 1656 au = "DH"; 1657 break; 1658 case SSL_aKRB5: 1659 au = "KRB5"; 1660 break; 1661 case SSL_aECDH: 1662 au = "ECDH"; 1663 break; 1664 case SSL_aNULL: 1665 au = "None"; 1666 break; 1667 case SSL_aECDSA: 1668 au = "ECDSA"; 1669 break; 1670 case SSL_aPSK: 1671 au = "PSK"; 1672 break; 1673 case SSL_aSRP: 1674 au = "SRP"; 1675 break; 1676 case SSL_aGOST94: 1677 au = "GOST94"; 1678 break; 1679 case SSL_aGOST01: 1680 au = "GOST01"; 1681 break; 1682 default: 1683 au = "unknown"; 1684 break; 1685 } 1686 1687 switch (alg_enc) { 1688 case SSL_DES: 1689 enc = (is_export && kl == 5) ? "DES(40)" : "DES(56)"; 1690 break; 1691 case SSL_3DES: 1692 enc = "3DES(168)"; 1693 break; 1694 case SSL_RC4: 1695 enc = is_export ? (kl == 5 ? "RC4(40)" : "RC4(56)") 1696 : ((alg2 & SSL2_CF_8_BYTE_ENC) ? "RC4(64)" : "RC4(128)"); 1697 break; 1698 case SSL_RC2: 1699 enc = is_export ? (kl == 5 ? "RC2(40)" : "RC2(56)") : "RC2(128)"; 1700 break; 1701 case SSL_IDEA: 1702 enc = "IDEA(128)"; 1703 break; 1704 case SSL_eNULL: 1705 enc = "None"; 1706 break; 1707 case SSL_AES128: 1708 enc = "AES(128)"; 1709 break; 1710 case SSL_AES256: 1711 enc = "AES(256)"; 1712 break; 1713 case SSL_AES128GCM: 1714 enc = "AESGCM(128)"; 1715 break; 1716 case SSL_AES256GCM: 1717 enc = "AESGCM(256)"; 1718 break; 1719 case SSL_CAMELLIA128: 1720 enc = "Camellia(128)"; 1721 break; 1722 case SSL_CAMELLIA256: 1723 enc = "Camellia(256)"; 1724 break; 1725 case SSL_SEED: 1726 enc = "SEED(128)"; 1727 break; 1728 case SSL_eGOST2814789CNT: 1729 enc = "GOST89(256)"; 1730 break; 1731 default: 1732 enc = "unknown"; 1733 break; 1734 } 1735 1736 switch (alg_mac) { 1737 case SSL_MD5: 1738 mac = "MD5"; 1739 break; 1740 case SSL_SHA1: 1741 mac = "SHA1"; 1742 break; 1743 case SSL_SHA256: 1744 mac = "SHA256"; 1745 break; 1746 case SSL_SHA384: 1747 mac = "SHA384"; 1748 break; 1749 case SSL_AEAD: 1750 mac = "AEAD"; 1751 break; 1752 case SSL_GOST89MAC: 1753 mac = "GOST89"; 1754 break; 1755 case SSL_GOST94: 1756 mac = "GOST94"; 1757 break; 1758 default: 1759 mac = "unknown"; 1760 break; 1761 } 1762 1763 if (buf == NULL) { 1764 len = 128; 1765 buf = OPENSSL_malloc(len); 1766 if (buf == NULL) 1767 return ("OPENSSL_malloc Error"); 1768 } else if (len < 128) 1769 return ("Buffer too small"); 1770 1771#ifdef KSSL_DEBUG 1772 BIO_snprintf(buf, len, format, cipher->name, ver, kx, au, enc, mac, 1773 exp_str, alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl); 1774#else 1775 BIO_snprintf(buf, len, format, cipher->name, ver, kx, au, enc, mac, 1776 exp_str); 1777#endif /* KSSL_DEBUG */ 1778 return (buf); 1779} 1780 1781char *SSL_CIPHER_get_version(const SSL_CIPHER *c) 1782{ 1783 int i; 1784 1785 if (c == NULL) 1786 return ("(NONE)"); 1787 i = (int)(c->id >> 24L); 1788 if (i == 3) 1789 return ("TLSv1/SSLv3"); 1790 else if (i == 2) 1791 return ("SSLv2"); 1792 else 1793 return ("unknown"); 1794} 1795 1796/* return the actual cipher being used */ 1797const char *SSL_CIPHER_get_name(const SSL_CIPHER *c) 1798{ 1799 if (c != NULL) 1800 return (c->name); 1801 return ("(NONE)"); 1802} 1803 1804/* number of bits for symmetric cipher */ 1805int SSL_CIPHER_get_bits(const SSL_CIPHER *c, int *alg_bits) 1806{ 1807 int ret = 0; 1808 1809 if (c != NULL) { 1810 if (alg_bits != NULL) 1811 *alg_bits = c->alg_bits; 1812 ret = c->strength_bits; 1813 } 1814 return (ret); 1815} 1816 1817unsigned long SSL_CIPHER_get_id(const SSL_CIPHER *c) 1818{ 1819 return c->id; 1820} 1821 1822SSL_COMP *ssl3_comp_find(STACK_OF(SSL_COMP) *sk, int n) 1823{ 1824 SSL_COMP *ctmp; 1825 int i, nn; 1826 1827 if ((n == 0) || (sk == NULL)) 1828 return (NULL); 1829 nn = sk_SSL_COMP_num(sk); 1830 for (i = 0; i < nn; i++) { 1831 ctmp = sk_SSL_COMP_value(sk, i); 1832 if (ctmp->id == n) 1833 return (ctmp); 1834 } 1835 return (NULL); 1836} 1837 1838#ifdef OPENSSL_NO_COMP 1839void *SSL_COMP_get_compression_methods(void) 1840{ 1841 return NULL; 1842} 1843 1844int SSL_COMP_add_compression_method(int id, void *cm) 1845{ 1846 return 1; 1847} 1848 1849const char *SSL_COMP_get_name(const void *comp) 1850{ 1851 return NULL; 1852} 1853#else 1854STACK_OF(SSL_COMP) *SSL_COMP_get_compression_methods(void) 1855{ 1856 load_builtin_compressions(); 1857 return (ssl_comp_methods); 1858} 1859 1860int SSL_COMP_add_compression_method(int id, COMP_METHOD *cm) 1861{ 1862 SSL_COMP *comp; 1863 1864 if (cm == NULL || cm->type == NID_undef) 1865 return 1; 1866 1867 /*- 1868 * According to draft-ietf-tls-compression-04.txt, the 1869 * compression number ranges should be the following: 1870 * 1871 * 0 to 63: methods defined by the IETF 1872 * 64 to 192: external party methods assigned by IANA 1873 * 193 to 255: reserved for private use 1874 */ 1875 if (id < 193 || id > 255) { 1876 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD, 1877 SSL_R_COMPRESSION_ID_NOT_WITHIN_PRIVATE_RANGE); 1878 return 0; 1879 } 1880 1881 MemCheck_off(); 1882 comp = (SSL_COMP *)OPENSSL_malloc(sizeof(SSL_COMP)); 1883 comp->id = id; 1884 comp->method = cm; 1885 load_builtin_compressions(); 1886 if (ssl_comp_methods && sk_SSL_COMP_find(ssl_comp_methods, comp) >= 0) { 1887 OPENSSL_free(comp); 1888 MemCheck_on(); 1889 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD, 1890 SSL_R_DUPLICATE_COMPRESSION_ID); 1891 return (1); 1892 } else if ((ssl_comp_methods == NULL) 1893 || !sk_SSL_COMP_push(ssl_comp_methods, comp)) { 1894 OPENSSL_free(comp); 1895 MemCheck_on(); 1896 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD, ERR_R_MALLOC_FAILURE); 1897 return (1); 1898 } else { 1899 MemCheck_on(); 1900 return (0); 1901 } 1902} 1903 1904const char *SSL_COMP_get_name(const COMP_METHOD *comp) 1905{ 1906 if (comp) 1907 return comp->name; 1908 return NULL; 1909} 1910 1911#endif 1912