ssl_ciph.c revision 392aa7cc7d2b122614c5393c3e357da07fd07af3
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 170static const EVP_CIPHER *ssl_cipher_methods[SSL_ENC_NUM_IDX]={ 171 NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,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/*Constant SSL_MAX_DIGEST equal to size of digests array should be 187 * defined in the 188 * ssl_locl.h */ 189#define SSL_MD_NUM_IDX SSL_MAX_DIGEST 190static const EVP_MD *ssl_digest_methods[SSL_MD_NUM_IDX]={ 191 NULL,NULL,NULL,NULL,NULL,NULL 192 }; 193/* PKEY_TYPE for GOST89MAC is known in advance, but, because 194 * implementation is engine-provided, we'll fill it only if 195 * corresponding EVP_PKEY_METHOD is found 196 */ 197static int ssl_mac_pkey_id[SSL_MD_NUM_IDX]={ 198 EVP_PKEY_HMAC,EVP_PKEY_HMAC,EVP_PKEY_HMAC,NID_undef, 199 EVP_PKEY_HMAC,EVP_PKEY_HMAC 200 }; 201 202static int ssl_mac_secret_size[SSL_MD_NUM_IDX]={ 203 0,0,0,0,0,0 204 }; 205 206static int ssl_handshake_digest_flag[SSL_MD_NUM_IDX]={ 207 SSL_HANDSHAKE_MAC_MD5,SSL_HANDSHAKE_MAC_SHA, 208 SSL_HANDSHAKE_MAC_GOST94, 0, SSL_HANDSHAKE_MAC_SHA256, 209 SSL_HANDSHAKE_MAC_SHA384 210 }; 211 212#define CIPHER_ADD 1 213#define CIPHER_KILL 2 214#define CIPHER_DEL 3 215#define CIPHER_ORD 4 216#define CIPHER_SPECIAL 5 217 218typedef struct cipher_order_st 219 { 220 const SSL_CIPHER *cipher; 221 int active; 222 int dead; 223 struct cipher_order_st *next,*prev; 224 } CIPHER_ORDER; 225 226static const SSL_CIPHER cipher_aliases[]={ 227 /* "ALL" doesn't include eNULL (must be specifically enabled) */ 228 {0,SSL_TXT_ALL,0, 0,0,~SSL_eNULL,0,0,0,0,0,0}, 229 /* "COMPLEMENTOFALL" */ 230 {0,SSL_TXT_CMPALL,0, 0,0,SSL_eNULL,0,0,0,0,0,0}, 231 232 /* "COMPLEMENTOFDEFAULT" (does *not* include ciphersuites not found in ALL!) */ 233 {0,SSL_TXT_CMPDEF,0, SSL_kEDH|SSL_kEECDH,SSL_aNULL,~SSL_eNULL,0,0,0,0,0,0}, 234 235 /* key exchange aliases 236 * (some of those using only a single bit here combine 237 * multiple key exchange algs according to the RFCs, 238 * e.g. kEDH combines DHE_DSS and DHE_RSA) */ 239 {0,SSL_TXT_kRSA,0, SSL_kRSA, 0,0,0,0,0,0,0,0}, 240 241 {0,SSL_TXT_kDHr,0, SSL_kDHr, 0,0,0,0,0,0,0,0}, /* no such ciphersuites supported! */ 242 {0,SSL_TXT_kDHd,0, SSL_kDHd, 0,0,0,0,0,0,0,0}, /* no such ciphersuites supported! */ 243 {0,SSL_TXT_kDH,0, SSL_kDHr|SSL_kDHd,0,0,0,0,0,0,0,0}, /* no such ciphersuites supported! */ 244 {0,SSL_TXT_kEDH,0, SSL_kEDH, 0,0,0,0,0,0,0,0}, 245 {0,SSL_TXT_DH,0, SSL_kDHr|SSL_kDHd|SSL_kEDH,0,0,0,0,0,0,0,0}, 246 247 {0,SSL_TXT_kKRB5,0, SSL_kKRB5, 0,0,0,0,0,0,0,0}, 248 249 {0,SSL_TXT_kECDHr,0, SSL_kECDHr,0,0,0,0,0,0,0,0}, 250 {0,SSL_TXT_kECDHe,0, SSL_kECDHe,0,0,0,0,0,0,0,0}, 251 {0,SSL_TXT_kECDH,0, SSL_kECDHr|SSL_kECDHe,0,0,0,0,0,0,0,0}, 252 {0,SSL_TXT_kEECDH,0, SSL_kEECDH,0,0,0,0,0,0,0,0}, 253 {0,SSL_TXT_ECDH,0, SSL_kECDHr|SSL_kECDHe|SSL_kEECDH,0,0,0,0,0,0,0,0}, 254 255 {0,SSL_TXT_kPSK,0, SSL_kPSK, 0,0,0,0,0,0,0,0}, 256 {0,SSL_TXT_kSRP,0, SSL_kSRP, 0,0,0,0,0,0,0,0}, 257 {0,SSL_TXT_kGOST,0, SSL_kGOST,0,0,0,0,0,0,0,0}, 258 259 /* server authentication aliases */ 260 {0,SSL_TXT_aRSA,0, 0,SSL_aRSA, 0,0,0,0,0,0,0}, 261 {0,SSL_TXT_aDSS,0, 0,SSL_aDSS, 0,0,0,0,0,0,0}, 262 {0,SSL_TXT_DSS,0, 0,SSL_aDSS, 0,0,0,0,0,0,0}, 263 {0,SSL_TXT_aKRB5,0, 0,SSL_aKRB5, 0,0,0,0,0,0,0}, 264 {0,SSL_TXT_aNULL,0, 0,SSL_aNULL, 0,0,0,0,0,0,0}, 265 {0,SSL_TXT_aDH,0, 0,SSL_aDH, 0,0,0,0,0,0,0}, /* no such ciphersuites supported! */ 266 {0,SSL_TXT_aECDH,0, 0,SSL_aECDH, 0,0,0,0,0,0,0}, 267 {0,SSL_TXT_aECDSA,0, 0,SSL_aECDSA,0,0,0,0,0,0,0}, 268 {0,SSL_TXT_ECDSA,0, 0,SSL_aECDSA, 0,0,0,0,0,0,0}, 269 {0,SSL_TXT_aPSK,0, 0,SSL_aPSK, 0,0,0,0,0,0,0}, 270 {0,SSL_TXT_aGOST94,0,0,SSL_aGOST94,0,0,0,0,0,0,0}, 271 {0,SSL_TXT_aGOST01,0,0,SSL_aGOST01,0,0,0,0,0,0,0}, 272 {0,SSL_TXT_aGOST,0,0,SSL_aGOST94|SSL_aGOST01,0,0,0,0,0,0,0}, 273 274 /* aliases combining key exchange and server authentication */ 275 {0,SSL_TXT_EDH,0, SSL_kEDH,~SSL_aNULL,0,0,0,0,0,0,0}, 276 {0,SSL_TXT_EECDH,0, SSL_kEECDH,~SSL_aNULL,0,0,0,0,0,0,0}, 277 {0,SSL_TXT_NULL,0, 0,0,SSL_eNULL, 0,0,0,0,0,0}, 278 {0,SSL_TXT_KRB5,0, SSL_kKRB5,SSL_aKRB5,0,0,0,0,0,0,0}, 279 {0,SSL_TXT_RSA,0, SSL_kRSA,SSL_aRSA,0,0,0,0,0,0,0}, 280 {0,SSL_TXT_ADH,0, SSL_kEDH,SSL_aNULL,0,0,0,0,0,0,0}, 281 {0,SSL_TXT_AECDH,0, SSL_kEECDH,SSL_aNULL,0,0,0,0,0,0,0}, 282 {0,SSL_TXT_PSK,0, SSL_kPSK,SSL_aPSK,0,0,0,0,0,0,0}, 283 {0,SSL_TXT_SRP,0, SSL_kSRP,0,0,0,0,0,0,0,0}, 284 285 286 /* symmetric encryption aliases */ 287 {0,SSL_TXT_DES,0, 0,0,SSL_DES, 0,0,0,0,0,0}, 288 {0,SSL_TXT_3DES,0, 0,0,SSL_3DES, 0,0,0,0,0,0}, 289 {0,SSL_TXT_RC4,0, 0,0,SSL_RC4, 0,0,0,0,0,0}, 290 {0,SSL_TXT_RC2,0, 0,0,SSL_RC2, 0,0,0,0,0,0}, 291 {0,SSL_TXT_IDEA,0, 0,0,SSL_IDEA, 0,0,0,0,0,0}, 292 {0,SSL_TXT_SEED,0, 0,0,SSL_SEED, 0,0,0,0,0,0}, 293 {0,SSL_TXT_eNULL,0, 0,0,SSL_eNULL, 0,0,0,0,0,0}, 294 {0,SSL_TXT_AES128,0, 0,0,SSL_AES128|SSL_AES128GCM,0,0,0,0,0,0}, 295 {0,SSL_TXT_AES256,0, 0,0,SSL_AES256|SSL_AES256GCM,0,0,0,0,0,0}, 296 {0,SSL_TXT_AES,0, 0,0,SSL_AES,0,0,0,0,0,0}, 297 {0,SSL_TXT_AES_GCM,0, 0,0,SSL_AES128GCM|SSL_AES256GCM,0,0,0,0,0,0}, 298 {0,SSL_TXT_CAMELLIA128,0,0,0,SSL_CAMELLIA128,0,0,0,0,0,0}, 299 {0,SSL_TXT_CAMELLIA256,0,0,0,SSL_CAMELLIA256,0,0,0,0,0,0}, 300 {0,SSL_TXT_CAMELLIA ,0,0,0,SSL_CAMELLIA128|SSL_CAMELLIA256,0,0,0,0,0,0}, 301 302 /* MAC aliases */ 303 {0,SSL_TXT_MD5,0, 0,0,0,SSL_MD5, 0,0,0,0,0}, 304 {0,SSL_TXT_SHA1,0, 0,0,0,SSL_SHA1, 0,0,0,0,0}, 305 {0,SSL_TXT_SHA,0, 0,0,0,SSL_SHA1, 0,0,0,0,0}, 306 {0,SSL_TXT_GOST94,0, 0,0,0,SSL_GOST94, 0,0,0,0,0}, 307 {0,SSL_TXT_GOST89MAC,0, 0,0,0,SSL_GOST89MAC, 0,0,0,0,0}, 308 {0,SSL_TXT_SHA256,0, 0,0,0,SSL_SHA256, 0,0,0,0,0}, 309 {0,SSL_TXT_SHA384,0, 0,0,0,SSL_SHA384, 0,0,0,0,0}, 310 311 /* protocol version aliases */ 312 {0,SSL_TXT_SSLV2,0, 0,0,0,0,SSL_SSLV2, 0,0,0,0}, 313 {0,SSL_TXT_SSLV3,0, 0,0,0,0,SSL_SSLV3, 0,0,0,0}, 314 {0,SSL_TXT_TLSV1,0, 0,0,0,0,SSL_TLSV1, 0,0,0,0}, 315 316 /* export flag */ 317 {0,SSL_TXT_EXP,0, 0,0,0,0,0,SSL_EXPORT,0,0,0}, 318 {0,SSL_TXT_EXPORT,0, 0,0,0,0,0,SSL_EXPORT,0,0,0}, 319 320 /* strength classes */ 321 {0,SSL_TXT_EXP40,0, 0,0,0,0,0,SSL_EXP40, 0,0,0}, 322 {0,SSL_TXT_EXP56,0, 0,0,0,0,0,SSL_EXP56, 0,0,0}, 323 {0,SSL_TXT_LOW,0, 0,0,0,0,0,SSL_LOW, 0,0,0}, 324 {0,SSL_TXT_MEDIUM,0, 0,0,0,0,0,SSL_MEDIUM,0,0,0}, 325 {0,SSL_TXT_HIGH,0, 0,0,0,0,0,SSL_HIGH, 0,0,0}, 326 /* FIPS 140-2 approved ciphersuite */ 327 {0,SSL_TXT_FIPS,0, 0,0,~SSL_eNULL,0,0,SSL_FIPS, 0,0,0}, 328 }; 329/* Search for public key algorithm with given name and 330 * return its pkey_id if it is available. Otherwise return 0 331 */ 332#ifdef OPENSSL_NO_ENGINE 333 334static int get_optional_pkey_id(const char *pkey_name) 335 { 336 const EVP_PKEY_ASN1_METHOD *ameth; 337 int pkey_id=0; 338 ameth = EVP_PKEY_asn1_find_str(NULL,pkey_name,-1); 339 if (ameth) 340 { 341 EVP_PKEY_asn1_get0_info(&pkey_id, NULL,NULL,NULL,NULL,ameth); 342 } 343 return pkey_id; 344 } 345 346#else 347 348static int get_optional_pkey_id(const char *pkey_name) 349 { 350 const EVP_PKEY_ASN1_METHOD *ameth; 351 ENGINE *tmpeng = NULL; 352 int pkey_id=0; 353 ameth = EVP_PKEY_asn1_find_str(&tmpeng,pkey_name,-1); 354 if (ameth) 355 { 356 EVP_PKEY_asn1_get0_info(&pkey_id, NULL,NULL,NULL,NULL,ameth); 357 } 358 if (tmpeng) ENGINE_finish(tmpeng); 359 return pkey_id; 360 } 361 362#endif 363 364void ssl_load_ciphers(void) 365 { 366 ssl_cipher_methods[SSL_ENC_DES_IDX]= 367 EVP_get_cipherbyname(SN_des_cbc); 368 ssl_cipher_methods[SSL_ENC_3DES_IDX]= 369 EVP_get_cipherbyname(SN_des_ede3_cbc); 370 ssl_cipher_methods[SSL_ENC_RC4_IDX]= 371 EVP_get_cipherbyname(SN_rc4); 372 ssl_cipher_methods[SSL_ENC_RC2_IDX]= 373 EVP_get_cipherbyname(SN_rc2_cbc); 374#ifndef OPENSSL_NO_IDEA 375 ssl_cipher_methods[SSL_ENC_IDEA_IDX]= 376 EVP_get_cipherbyname(SN_idea_cbc); 377#else 378 ssl_cipher_methods[SSL_ENC_IDEA_IDX]= NULL; 379#endif 380 ssl_cipher_methods[SSL_ENC_AES128_IDX]= 381 EVP_get_cipherbyname(SN_aes_128_cbc); 382 ssl_cipher_methods[SSL_ENC_AES256_IDX]= 383 EVP_get_cipherbyname(SN_aes_256_cbc); 384 ssl_cipher_methods[SSL_ENC_CAMELLIA128_IDX]= 385 EVP_get_cipherbyname(SN_camellia_128_cbc); 386 ssl_cipher_methods[SSL_ENC_CAMELLIA256_IDX]= 387 EVP_get_cipherbyname(SN_camellia_256_cbc); 388 ssl_cipher_methods[SSL_ENC_GOST89_IDX]= 389 EVP_get_cipherbyname(SN_gost89_cnt); 390 ssl_cipher_methods[SSL_ENC_SEED_IDX]= 391 EVP_get_cipherbyname(SN_seed_cbc); 392 393 ssl_cipher_methods[SSL_ENC_AES128GCM_IDX]= 394 EVP_get_cipherbyname(SN_aes_128_gcm); 395 ssl_cipher_methods[SSL_ENC_AES256GCM_IDX]= 396 EVP_get_cipherbyname(SN_aes_256_gcm); 397 398 ssl_digest_methods[SSL_MD_MD5_IDX]= 399 EVP_get_digestbyname(SN_md5); 400 ssl_mac_secret_size[SSL_MD_MD5_IDX]= 401 EVP_MD_size(ssl_digest_methods[SSL_MD_MD5_IDX]); 402 OPENSSL_assert(ssl_mac_secret_size[SSL_MD_MD5_IDX] >= 0); 403 ssl_digest_methods[SSL_MD_SHA1_IDX]= 404 EVP_get_digestbyname(SN_sha1); 405 ssl_mac_secret_size[SSL_MD_SHA1_IDX]= 406 EVP_MD_size(ssl_digest_methods[SSL_MD_SHA1_IDX]); 407 OPENSSL_assert(ssl_mac_secret_size[SSL_MD_SHA1_IDX] >= 0); 408 ssl_digest_methods[SSL_MD_GOST94_IDX]= 409 EVP_get_digestbyname(SN_id_GostR3411_94); 410 if (ssl_digest_methods[SSL_MD_GOST94_IDX]) 411 { 412 ssl_mac_secret_size[SSL_MD_GOST94_IDX]= 413 EVP_MD_size(ssl_digest_methods[SSL_MD_GOST94_IDX]); 414 OPENSSL_assert(ssl_mac_secret_size[SSL_MD_GOST94_IDX] >= 0); 415 } 416 ssl_digest_methods[SSL_MD_GOST89MAC_IDX]= 417 EVP_get_digestbyname(SN_id_Gost28147_89_MAC); 418 ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX] = get_optional_pkey_id("gost-mac"); 419 if (ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX]) { 420 ssl_mac_secret_size[SSL_MD_GOST89MAC_IDX]=32; 421 } 422 423 ssl_digest_methods[SSL_MD_SHA256_IDX]= 424 EVP_get_digestbyname(SN_sha256); 425 ssl_mac_secret_size[SSL_MD_SHA256_IDX]= 426 EVP_MD_size(ssl_digest_methods[SSL_MD_SHA256_IDX]); 427 ssl_digest_methods[SSL_MD_SHA384_IDX]= 428 EVP_get_digestbyname(SN_sha384); 429 ssl_mac_secret_size[SSL_MD_SHA384_IDX]= 430 EVP_MD_size(ssl_digest_methods[SSL_MD_SHA384_IDX]); 431 } 432#ifndef OPENSSL_NO_COMP 433 434static int sk_comp_cmp(const SSL_COMP * const *a, 435 const SSL_COMP * const *b) 436 { 437 return((*a)->id-(*b)->id); 438 } 439 440static void load_builtin_compressions(void) 441 { 442 int got_write_lock = 0; 443 444 CRYPTO_r_lock(CRYPTO_LOCK_SSL); 445 if (ssl_comp_methods == NULL) 446 { 447 CRYPTO_r_unlock(CRYPTO_LOCK_SSL); 448 CRYPTO_w_lock(CRYPTO_LOCK_SSL); 449 got_write_lock = 1; 450 451 if (ssl_comp_methods == NULL) 452 { 453 SSL_COMP *comp = NULL; 454 455 MemCheck_off(); 456 ssl_comp_methods=sk_SSL_COMP_new(sk_comp_cmp); 457 if (ssl_comp_methods != NULL) 458 { 459 comp=(SSL_COMP *)OPENSSL_malloc(sizeof(SSL_COMP)); 460 if (comp != NULL) 461 { 462 comp->method=COMP_zlib(); 463 if (comp->method 464 && comp->method->type == NID_undef) 465 OPENSSL_free(comp); 466 else 467 { 468 comp->id=SSL_COMP_ZLIB_IDX; 469 comp->name=comp->method->name; 470 sk_SSL_COMP_push(ssl_comp_methods,comp); 471 } 472 } 473 sk_SSL_COMP_sort(ssl_comp_methods); 474 } 475 MemCheck_on(); 476 } 477 } 478 479 if (got_write_lock) 480 CRYPTO_w_unlock(CRYPTO_LOCK_SSL); 481 else 482 CRYPTO_r_unlock(CRYPTO_LOCK_SSL); 483 } 484#endif 485 486int ssl_cipher_get_evp(const SSL_SESSION *s, const EVP_CIPHER **enc, 487 const EVP_MD **md, int *mac_pkey_type, int *mac_secret_size,SSL_COMP **comp) 488 { 489 int i; 490 const SSL_CIPHER *c; 491 492 c=s->cipher; 493 if (c == NULL) return(0); 494 if (comp != NULL) 495 { 496 SSL_COMP ctmp; 497#ifndef OPENSSL_NO_COMP 498 load_builtin_compressions(); 499#endif 500 501 *comp=NULL; 502 ctmp.id=s->compress_meth; 503 if (ssl_comp_methods != NULL) 504 { 505 i=sk_SSL_COMP_find(ssl_comp_methods,&ctmp); 506 if (i >= 0) 507 *comp=sk_SSL_COMP_value(ssl_comp_methods,i); 508 else 509 *comp=NULL; 510 } 511 } 512 513 if ((enc == NULL) || (md == NULL)) return(0); 514 515 switch (c->algorithm_enc) 516 { 517 case SSL_DES: 518 i=SSL_ENC_DES_IDX; 519 break; 520 case SSL_3DES: 521 i=SSL_ENC_3DES_IDX; 522 break; 523 case SSL_RC4: 524 i=SSL_ENC_RC4_IDX; 525 break; 526 case SSL_RC2: 527 i=SSL_ENC_RC2_IDX; 528 break; 529 case SSL_IDEA: 530 i=SSL_ENC_IDEA_IDX; 531 break; 532 case SSL_eNULL: 533 i=SSL_ENC_NULL_IDX; 534 break; 535 case SSL_AES128: 536 i=SSL_ENC_AES128_IDX; 537 break; 538 case SSL_AES256: 539 i=SSL_ENC_AES256_IDX; 540 break; 541 case SSL_CAMELLIA128: 542 i=SSL_ENC_CAMELLIA128_IDX; 543 break; 544 case SSL_CAMELLIA256: 545 i=SSL_ENC_CAMELLIA256_IDX; 546 break; 547 case SSL_eGOST2814789CNT: 548 i=SSL_ENC_GOST89_IDX; 549 break; 550 case SSL_SEED: 551 i=SSL_ENC_SEED_IDX; 552 break; 553 case SSL_AES128GCM: 554 i=SSL_ENC_AES128GCM_IDX; 555 break; 556 case SSL_AES256GCM: 557 i=SSL_ENC_AES256GCM_IDX; 558 break; 559 default: 560 i= -1; 561 break; 562 } 563 564 if ((i < 0) || (i > SSL_ENC_NUM_IDX)) 565 *enc=NULL; 566 else 567 { 568 if (i == SSL_ENC_NULL_IDX) 569 *enc=EVP_enc_null(); 570 else 571 *enc=ssl_cipher_methods[i]; 572 } 573 574 switch (c->algorithm_mac) 575 { 576 case SSL_MD5: 577 i=SSL_MD_MD5_IDX; 578 break; 579 case SSL_SHA1: 580 i=SSL_MD_SHA1_IDX; 581 break; 582 case SSL_SHA256: 583 i=SSL_MD_SHA256_IDX; 584 break; 585 case SSL_SHA384: 586 i=SSL_MD_SHA384_IDX; 587 break; 588 case SSL_GOST94: 589 i = SSL_MD_GOST94_IDX; 590 break; 591 case SSL_GOST89MAC: 592 i = SSL_MD_GOST89MAC_IDX; 593 break; 594 default: 595 i= -1; 596 break; 597 } 598 if ((i < 0) || (i > SSL_MD_NUM_IDX)) 599 { 600 *md=NULL; 601 if (mac_pkey_type!=NULL) *mac_pkey_type = NID_undef; 602 if (mac_secret_size!=NULL) *mac_secret_size = 0; 603 if (c->algorithm_mac == SSL_AEAD) 604 mac_pkey_type = NULL; 605 } 606 else 607 { 608 *md=ssl_digest_methods[i]; 609 if (mac_pkey_type!=NULL) *mac_pkey_type = ssl_mac_pkey_id[i]; 610 if (mac_secret_size!=NULL) *mac_secret_size = ssl_mac_secret_size[i]; 611 } 612 613 if ((*enc != NULL) && 614 (*md != NULL || (EVP_CIPHER_flags(*enc)&EVP_CIPH_FLAG_AEAD_CIPHER)) && 615 (!mac_pkey_type||*mac_pkey_type != NID_undef)) 616 { 617 const EVP_CIPHER *evp; 618 619 if (s->ssl_version >= TLS1_VERSION && 620 c->algorithm_enc == SSL_RC4 && 621 c->algorithm_mac == SSL_MD5 && 622 (evp=EVP_get_cipherbyname("RC4-HMAC-MD5"))) 623 *enc = evp, *md = NULL; 624 else if (s->ssl_version >= TLS1_VERSION && 625 c->algorithm_enc == SSL_AES128 && 626 c->algorithm_mac == SSL_SHA1 && 627 (evp=EVP_get_cipherbyname("AES-128-CBC-HMAC-SHA1"))) 628 *enc = evp, *md = NULL; 629 else if (s->ssl_version >= TLS1_VERSION && 630 c->algorithm_enc == SSL_AES256 && 631 c->algorithm_mac == SSL_SHA1 && 632 (evp=EVP_get_cipherbyname("AES-256-CBC-HMAC-SHA1"))) 633 *enc = evp, *md = NULL; 634 return(1); 635 } 636 else 637 return(0); 638 } 639 640int ssl_get_handshake_digest(int idx, long *mask, const EVP_MD **md) 641{ 642 if (idx <0||idx>=SSL_MD_NUM_IDX) 643 { 644 return 0; 645 } 646 *mask = ssl_handshake_digest_flag[idx]; 647 if (*mask) 648 *md = ssl_digest_methods[idx]; 649 else 650 *md = NULL; 651 return 1; 652} 653 654#define ITEM_SEP(a) \ 655 (((a) == ':') || ((a) == ' ') || ((a) == ';') || ((a) == ',')) 656 657static void ll_append_tail(CIPHER_ORDER **head, CIPHER_ORDER *curr, 658 CIPHER_ORDER **tail) 659 { 660 if (curr == *tail) return; 661 if (curr == *head) 662 *head=curr->next; 663 if (curr->prev != NULL) 664 curr->prev->next=curr->next; 665 if (curr->next != NULL) 666 curr->next->prev=curr->prev; 667 (*tail)->next=curr; 668 curr->prev= *tail; 669 curr->next=NULL; 670 *tail=curr; 671 } 672 673static void ll_append_head(CIPHER_ORDER **head, CIPHER_ORDER *curr, 674 CIPHER_ORDER **tail) 675 { 676 if (curr == *head) return; 677 if (curr == *tail) 678 *tail=curr->prev; 679 if (curr->next != NULL) 680 curr->next->prev=curr->prev; 681 if (curr->prev != NULL) 682 curr->prev->next=curr->next; 683 (*head)->prev=curr; 684 curr->next= *head; 685 curr->prev=NULL; 686 *head=curr; 687 } 688 689static void ssl_cipher_get_disabled(unsigned long *mkey, unsigned long *auth, unsigned long *enc, unsigned long *mac, unsigned long *ssl) 690 { 691 *mkey = 0; 692 *auth = 0; 693 *enc = 0; 694 *mac = 0; 695 *ssl = 0; 696 697#ifdef OPENSSL_NO_RSA 698 *mkey |= SSL_kRSA; 699 *auth |= SSL_aRSA; 700#endif 701#ifdef OPENSSL_NO_DSA 702 *auth |= SSL_aDSS; 703#endif 704 *mkey |= SSL_kDHr|SSL_kDHd; /* no such ciphersuites supported! */ 705 *auth |= SSL_aDH; 706#ifdef OPENSSL_NO_DH 707 *mkey |= SSL_kDHr|SSL_kDHd|SSL_kEDH; 708 *auth |= SSL_aDH; 709#endif 710#ifdef OPENSSL_NO_KRB5 711 *mkey |= SSL_kKRB5; 712 *auth |= SSL_aKRB5; 713#endif 714#ifdef OPENSSL_NO_ECDSA 715 *auth |= SSL_aECDSA; 716#endif 717#ifdef OPENSSL_NO_ECDH 718 *mkey |= SSL_kECDHe|SSL_kECDHr; 719 *auth |= SSL_aECDH; 720#endif 721#ifdef OPENSSL_NO_PSK 722 *mkey |= SSL_kPSK; 723 *auth |= SSL_aPSK; 724#endif 725#ifdef OPENSSL_NO_SRP 726 *mkey |= SSL_kSRP; 727#endif 728 /* Check for presence of GOST 34.10 algorithms, and if they 729 * do not present, disable appropriate auth and key exchange */ 730 if (!get_optional_pkey_id("gost94")) { 731 *auth |= SSL_aGOST94; 732 } 733 if (!get_optional_pkey_id("gost2001")) { 734 *auth |= SSL_aGOST01; 735 } 736 /* Disable GOST key exchange if no GOST signature algs are available * */ 737 if ((*auth & (SSL_aGOST94|SSL_aGOST01)) == (SSL_aGOST94|SSL_aGOST01)) { 738 *mkey |= SSL_kGOST; 739 } 740#ifdef SSL_FORBID_ENULL 741 *enc |= SSL_eNULL; 742#endif 743 744 745 746 *enc |= (ssl_cipher_methods[SSL_ENC_DES_IDX ] == NULL) ? SSL_DES :0; 747 *enc |= (ssl_cipher_methods[SSL_ENC_3DES_IDX] == NULL) ? SSL_3DES:0; 748 *enc |= (ssl_cipher_methods[SSL_ENC_RC4_IDX ] == NULL) ? SSL_RC4 :0; 749 *enc |= (ssl_cipher_methods[SSL_ENC_RC2_IDX ] == NULL) ? SSL_RC2 :0; 750 *enc |= (ssl_cipher_methods[SSL_ENC_IDEA_IDX] == NULL) ? SSL_IDEA:0; 751 *enc |= (ssl_cipher_methods[SSL_ENC_AES128_IDX] == NULL) ? SSL_AES128:0; 752 *enc |= (ssl_cipher_methods[SSL_ENC_AES256_IDX] == NULL) ? SSL_AES256:0; 753 *enc |= (ssl_cipher_methods[SSL_ENC_AES128GCM_IDX] == NULL) ? SSL_AES128GCM:0; 754 *enc |= (ssl_cipher_methods[SSL_ENC_AES256GCM_IDX] == NULL) ? SSL_AES256GCM:0; 755 *enc |= (ssl_cipher_methods[SSL_ENC_CAMELLIA128_IDX] == NULL) ? SSL_CAMELLIA128:0; 756 *enc |= (ssl_cipher_methods[SSL_ENC_CAMELLIA256_IDX] == NULL) ? SSL_CAMELLIA256:0; 757 *enc |= (ssl_cipher_methods[SSL_ENC_GOST89_IDX] == NULL) ? SSL_eGOST2814789CNT:0; 758 *enc |= (ssl_cipher_methods[SSL_ENC_SEED_IDX] == NULL) ? SSL_SEED:0; 759 760 *mac |= (ssl_digest_methods[SSL_MD_MD5_IDX ] == NULL) ? SSL_MD5 :0; 761 *mac |= (ssl_digest_methods[SSL_MD_SHA1_IDX] == NULL) ? SSL_SHA1:0; 762 *mac |= (ssl_digest_methods[SSL_MD_SHA256_IDX] == NULL) ? SSL_SHA256:0; 763 *mac |= (ssl_digest_methods[SSL_MD_SHA384_IDX] == NULL) ? SSL_SHA384:0; 764 *mac |= (ssl_digest_methods[SSL_MD_GOST94_IDX] == NULL) ? SSL_GOST94:0; 765 *mac |= (ssl_digest_methods[SSL_MD_GOST89MAC_IDX] == NULL || ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX]==NID_undef)? SSL_GOST89MAC:0; 766 767 } 768 769static void ssl_cipher_collect_ciphers(const SSL_METHOD *ssl_method, 770 int num_of_ciphers, 771 unsigned long disabled_mkey, unsigned long disabled_auth, 772 unsigned long disabled_enc, unsigned long disabled_mac, 773 unsigned long disabled_ssl, 774 CIPHER_ORDER *co_list, 775 CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p) 776 { 777 int i, co_list_num; 778 const SSL_CIPHER *c; 779 780 /* 781 * We have num_of_ciphers descriptions compiled in, depending on the 782 * method selected (SSLv2 and/or SSLv3, TLSv1 etc). 783 * These will later be sorted in a linked list with at most num 784 * entries. 785 */ 786 787 /* Get the initial list of ciphers */ 788 co_list_num = 0; /* actual count of ciphers */ 789 for (i = 0; i < num_of_ciphers; i++) 790 { 791 c = ssl_method->get_cipher(i); 792 /* drop those that use any of that is not available */ 793 if ((c != NULL) && c->valid && 794#ifdef OPENSSL_FIPS 795 (!FIPS_mode() || (c->algo_strength & SSL_FIPS)) && 796#endif 797 !(c->algorithm_mkey & disabled_mkey) && 798 !(c->algorithm_auth & disabled_auth) && 799 !(c->algorithm_enc & disabled_enc) && 800 !(c->algorithm_mac & disabled_mac) && 801 !(c->algorithm_ssl & disabled_ssl)) 802 { 803 co_list[co_list_num].cipher = c; 804 co_list[co_list_num].next = NULL; 805 co_list[co_list_num].prev = NULL; 806 co_list[co_list_num].active = 0; 807 co_list_num++; 808#ifdef KSSL_DEBUG 809 printf("\t%d: %s %lx %lx %lx\n",i,c->name,c->id,c->algorithm_mkey,c->algorithm_auth); 810#endif /* KSSL_DEBUG */ 811 /* 812 if (!sk_push(ca_list,(char *)c)) goto err; 813 */ 814 } 815 } 816 817 /* 818 * Prepare linked list from list entries 819 */ 820 if (co_list_num > 0) 821 { 822 co_list[0].prev = NULL; 823 824 if (co_list_num > 1) 825 { 826 co_list[0].next = &co_list[1]; 827 828 for (i = 1; i < co_list_num - 1; i++) 829 { 830 co_list[i].prev = &co_list[i - 1]; 831 co_list[i].next = &co_list[i + 1]; 832 } 833 834 co_list[co_list_num - 1].prev = &co_list[co_list_num - 2]; 835 } 836 837 co_list[co_list_num - 1].next = NULL; 838 839 *head_p = &co_list[0]; 840 *tail_p = &co_list[co_list_num - 1]; 841 } 842 } 843 844static void ssl_cipher_collect_aliases(const SSL_CIPHER **ca_list, 845 int num_of_group_aliases, 846 unsigned long disabled_mkey, unsigned long disabled_auth, 847 unsigned long disabled_enc, unsigned long disabled_mac, 848 unsigned long disabled_ssl, 849 CIPHER_ORDER *head) 850 { 851 CIPHER_ORDER *ciph_curr; 852 const SSL_CIPHER **ca_curr; 853 int i; 854 unsigned long mask_mkey = ~disabled_mkey; 855 unsigned long mask_auth = ~disabled_auth; 856 unsigned long mask_enc = ~disabled_enc; 857 unsigned long mask_mac = ~disabled_mac; 858 unsigned long mask_ssl = ~disabled_ssl; 859 860 /* 861 * First, add the real ciphers as already collected 862 */ 863 ciph_curr = head; 864 ca_curr = ca_list; 865 while (ciph_curr != NULL) 866 { 867 *ca_curr = ciph_curr->cipher; 868 ca_curr++; 869 ciph_curr = ciph_curr->next; 870 } 871 872 /* 873 * Now we add the available ones from the cipher_aliases[] table. 874 * They represent either one or more algorithms, some of which 875 * in any affected category must be supported (set in enabled_mask), 876 * or represent a cipher strength value (will be added in any case because algorithms=0). 877 */ 878 for (i = 0; i < num_of_group_aliases; i++) 879 { 880 unsigned long algorithm_mkey = cipher_aliases[i].algorithm_mkey; 881 unsigned long algorithm_auth = cipher_aliases[i].algorithm_auth; 882 unsigned long algorithm_enc = cipher_aliases[i].algorithm_enc; 883 unsigned long algorithm_mac = cipher_aliases[i].algorithm_mac; 884 unsigned long algorithm_ssl = cipher_aliases[i].algorithm_ssl; 885 886 if (algorithm_mkey) 887 if ((algorithm_mkey & mask_mkey) == 0) 888 continue; 889 890 if (algorithm_auth) 891 if ((algorithm_auth & mask_auth) == 0) 892 continue; 893 894 if (algorithm_enc) 895 if ((algorithm_enc & mask_enc) == 0) 896 continue; 897 898 if (algorithm_mac) 899 if ((algorithm_mac & mask_mac) == 0) 900 continue; 901 902 if (algorithm_ssl) 903 if ((algorithm_ssl & mask_ssl) == 0) 904 continue; 905 906 *ca_curr = (SSL_CIPHER *)(cipher_aliases + i); 907 ca_curr++; 908 } 909 910 *ca_curr = NULL; /* end of list */ 911 } 912 913static void ssl_cipher_apply_rule(unsigned long cipher_id, 914 unsigned long alg_mkey, unsigned long alg_auth, 915 unsigned long alg_enc, unsigned long alg_mac, 916 unsigned long alg_ssl, 917 unsigned long algo_strength, 918 int rule, int strength_bits, 919 CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p) 920 { 921 CIPHER_ORDER *head, *tail, *curr, *curr2, *last; 922 const SSL_CIPHER *cp; 923 int reverse = 0; 924 925#ifdef CIPHER_DEBUG 926 printf("Applying rule %d with %08lx/%08lx/%08lx/%08lx/%08lx %08lx (%d)\n", 927 rule, alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl, algo_strength, strength_bits); 928#endif 929 930 if (rule == CIPHER_DEL) 931 reverse = 1; /* needed to maintain sorting between currently deleted ciphers */ 932 933 head = *head_p; 934 tail = *tail_p; 935 936 if (reverse) 937 { 938 curr = tail; 939 last = head; 940 } 941 else 942 { 943 curr = head; 944 last = tail; 945 } 946 947 curr2 = curr; 948 for (;;) 949 { 950 if ((curr == NULL) || (curr == last)) break; 951 curr = curr2; 952 curr2 = reverse ? curr->prev : curr->next; 953 954 cp = curr->cipher; 955 956 /* 957 * Selection criteria is either the value of strength_bits 958 * or the algorithms used. 959 */ 960 if (strength_bits >= 0) 961 { 962 if (strength_bits != cp->strength_bits) 963 continue; 964 } 965 else 966 { 967#ifdef CIPHER_DEBUG 968 printf("\nName: %s:\nAlgo = %08lx/%08lx/%08lx/%08lx/%08lx Algo_strength = %08lx\n", cp->name, cp->algorithm_mkey, cp->algorithm_auth, cp->algorithm_enc, cp->algorithm_mac, cp->algorithm_ssl, cp->algo_strength); 969#endif 970 971 if (alg_mkey && !(alg_mkey & cp->algorithm_mkey)) 972 continue; 973 if (alg_auth && !(alg_auth & cp->algorithm_auth)) 974 continue; 975 if (alg_enc && !(alg_enc & cp->algorithm_enc)) 976 continue; 977 if (alg_mac && !(alg_mac & cp->algorithm_mac)) 978 continue; 979 if (alg_ssl && !(alg_ssl & cp->algorithm_ssl)) 980 continue; 981 if ((algo_strength & SSL_EXP_MASK) && !(algo_strength & SSL_EXP_MASK & cp->algo_strength)) 982 continue; 983 if ((algo_strength & SSL_STRONG_MASK) && !(algo_strength & SSL_STRONG_MASK & cp->algo_strength)) 984 continue; 985 } 986 987#ifdef CIPHER_DEBUG 988 printf("Action = %d\n", rule); 989#endif 990 991 /* add the cipher if it has not been added yet. */ 992 if (rule == CIPHER_ADD) 993 { 994 /* reverse == 0 */ 995 if (!curr->active) 996 { 997 ll_append_tail(&head, curr, &tail); 998 curr->active = 1; 999 } 1000 } 1001 /* Move the added cipher to this location */ 1002 else if (rule == CIPHER_ORD) 1003 { 1004 /* reverse == 0 */ 1005 if (curr->active) 1006 { 1007 ll_append_tail(&head, curr, &tail); 1008 } 1009 } 1010 else if (rule == CIPHER_DEL) 1011 { 1012 /* reverse == 1 */ 1013 if (curr->active) 1014 { 1015 /* most recently deleted ciphersuites get best positions 1016 * for any future CIPHER_ADD (note that the CIPHER_DEL loop 1017 * works in reverse to maintain the order) */ 1018 ll_append_head(&head, curr, &tail); 1019 curr->active = 0; 1020 } 1021 } 1022 else if (rule == CIPHER_KILL) 1023 { 1024 /* reverse == 0 */ 1025 if (head == curr) 1026 head = curr->next; 1027 else 1028 curr->prev->next = curr->next; 1029 if (tail == curr) 1030 tail = curr->prev; 1031 curr->active = 0; 1032 if (curr->next != NULL) 1033 curr->next->prev = curr->prev; 1034 if (curr->prev != NULL) 1035 curr->prev->next = curr->next; 1036 curr->next = NULL; 1037 curr->prev = NULL; 1038 } 1039 } 1040 1041 *head_p = head; 1042 *tail_p = tail; 1043 } 1044 1045static int ssl_cipher_strength_sort(CIPHER_ORDER **head_p, 1046 CIPHER_ORDER **tail_p) 1047 { 1048 int max_strength_bits, i, *number_uses; 1049 CIPHER_ORDER *curr; 1050 1051 /* 1052 * This routine sorts the ciphers with descending strength. The sorting 1053 * must keep the pre-sorted sequence, so we apply the normal sorting 1054 * routine as '+' movement to the end of the list. 1055 */ 1056 max_strength_bits = 0; 1057 curr = *head_p; 1058 while (curr != NULL) 1059 { 1060 if (curr->active && 1061 (curr->cipher->strength_bits > max_strength_bits)) 1062 max_strength_bits = curr->cipher->strength_bits; 1063 curr = curr->next; 1064 } 1065 1066 number_uses = OPENSSL_malloc((max_strength_bits + 1) * sizeof(int)); 1067 if (!number_uses) 1068 { 1069 SSLerr(SSL_F_SSL_CIPHER_STRENGTH_SORT,ERR_R_MALLOC_FAILURE); 1070 return(0); 1071 } 1072 memset(number_uses, 0, (max_strength_bits + 1) * sizeof(int)); 1073 1074 /* 1075 * Now find the strength_bits values actually used 1076 */ 1077 curr = *head_p; 1078 while (curr != NULL) 1079 { 1080 if (curr->active) 1081 number_uses[curr->cipher->strength_bits]++; 1082 curr = curr->next; 1083 } 1084 /* 1085 * Go through the list of used strength_bits values in descending 1086 * order. 1087 */ 1088 for (i = max_strength_bits; i >= 0; i--) 1089 if (number_uses[i] > 0) 1090 ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_ORD, i, head_p, tail_p); 1091 1092 OPENSSL_free(number_uses); 1093 return(1); 1094 } 1095 1096static int ssl_cipher_process_rulestr(const char *rule_str, 1097 CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p, 1098 const SSL_CIPHER **ca_list) 1099 { 1100 unsigned long alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl, algo_strength; 1101 const char *l, *buf; 1102 int j, multi, found, rule, retval, ok, buflen; 1103 unsigned long cipher_id = 0; 1104 char ch; 1105 1106 retval = 1; 1107 l = rule_str; 1108 for (;;) 1109 { 1110 ch = *l; 1111 1112 if (ch == '\0') 1113 break; /* done */ 1114 if (ch == '-') 1115 { rule = CIPHER_DEL; l++; } 1116 else if (ch == '+') 1117 { rule = CIPHER_ORD; l++; } 1118 else if (ch == '!') 1119 { rule = CIPHER_KILL; l++; } 1120 else if (ch == '@') 1121 { rule = CIPHER_SPECIAL; l++; } 1122 else 1123 { rule = CIPHER_ADD; } 1124 1125 if (ITEM_SEP(ch)) 1126 { 1127 l++; 1128 continue; 1129 } 1130 1131 alg_mkey = 0; 1132 alg_auth = 0; 1133 alg_enc = 0; 1134 alg_mac = 0; 1135 alg_ssl = 0; 1136 algo_strength = 0; 1137 1138 for (;;) 1139 { 1140 ch = *l; 1141 buf = l; 1142 buflen = 0; 1143#ifndef CHARSET_EBCDIC 1144 while ( ((ch >= 'A') && (ch <= 'Z')) || 1145 ((ch >= '0') && (ch <= '9')) || 1146 ((ch >= 'a') && (ch <= 'z')) || 1147 (ch == '-')) 1148#else 1149 while ( isalnum(ch) || (ch == '-')) 1150#endif 1151 { 1152 ch = *(++l); 1153 buflen++; 1154 } 1155 1156 if (buflen == 0) 1157 { 1158 /* 1159 * We hit something we cannot deal with, 1160 * it is no command or separator nor 1161 * alphanumeric, so we call this an error. 1162 */ 1163 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR, 1164 SSL_R_INVALID_COMMAND); 1165 retval = found = 0; 1166 l++; 1167 break; 1168 } 1169 1170 if (rule == CIPHER_SPECIAL) 1171 { 1172 found = 0; /* unused -- avoid compiler warning */ 1173 break; /* special treatment */ 1174 } 1175 1176 /* check for multi-part specification */ 1177 if (ch == '+') 1178 { 1179 multi=1; 1180 l++; 1181 } 1182 else 1183 multi=0; 1184 1185 /* 1186 * Now search for the cipher alias in the ca_list. Be careful 1187 * with the strncmp, because the "buflen" limitation 1188 * will make the rule "ADH:SOME" and the cipher 1189 * "ADH-MY-CIPHER" look like a match for buflen=3. 1190 * So additionally check whether the cipher name found 1191 * has the correct length. We can save a strlen() call: 1192 * just checking for the '\0' at the right place is 1193 * sufficient, we have to strncmp() anyway. (We cannot 1194 * use strcmp(), because buf is not '\0' terminated.) 1195 */ 1196 j = found = 0; 1197 cipher_id = 0; 1198 while (ca_list[j]) 1199 { 1200 if (!strncmp(buf, ca_list[j]->name, buflen) && 1201 (ca_list[j]->name[buflen] == '\0')) 1202 { 1203 found = 1; 1204 break; 1205 } 1206 else 1207 j++; 1208 } 1209 1210 if (!found) 1211 break; /* ignore this entry */ 1212 1213 if (ca_list[j]->algorithm_mkey) 1214 { 1215 if (alg_mkey) 1216 { 1217 alg_mkey &= ca_list[j]->algorithm_mkey; 1218 if (!alg_mkey) { found = 0; break; } 1219 } 1220 else 1221 alg_mkey = ca_list[j]->algorithm_mkey; 1222 } 1223 1224 if (ca_list[j]->algorithm_auth) 1225 { 1226 if (alg_auth) 1227 { 1228 alg_auth &= ca_list[j]->algorithm_auth; 1229 if (!alg_auth) { found = 0; break; } 1230 } 1231 else 1232 alg_auth = ca_list[j]->algorithm_auth; 1233 } 1234 1235 if (ca_list[j]->algorithm_enc) 1236 { 1237 if (alg_enc) 1238 { 1239 alg_enc &= ca_list[j]->algorithm_enc; 1240 if (!alg_enc) { found = 0; break; } 1241 } 1242 else 1243 alg_enc = ca_list[j]->algorithm_enc; 1244 } 1245 1246 if (ca_list[j]->algorithm_mac) 1247 { 1248 if (alg_mac) 1249 { 1250 alg_mac &= ca_list[j]->algorithm_mac; 1251 if (!alg_mac) { found = 0; break; } 1252 } 1253 else 1254 alg_mac = ca_list[j]->algorithm_mac; 1255 } 1256 1257 if (ca_list[j]->algo_strength & SSL_EXP_MASK) 1258 { 1259 if (algo_strength & SSL_EXP_MASK) 1260 { 1261 algo_strength &= (ca_list[j]->algo_strength & SSL_EXP_MASK) | ~SSL_EXP_MASK; 1262 if (!(algo_strength & SSL_EXP_MASK)) { found = 0; break; } 1263 } 1264 else 1265 algo_strength |= ca_list[j]->algo_strength & SSL_EXP_MASK; 1266 } 1267 1268 if (ca_list[j]->algo_strength & SSL_STRONG_MASK) 1269 { 1270 if (algo_strength & SSL_STRONG_MASK) 1271 { 1272 algo_strength &= (ca_list[j]->algo_strength & SSL_STRONG_MASK) | ~SSL_STRONG_MASK; 1273 if (!(algo_strength & SSL_STRONG_MASK)) { found = 0; break; } 1274 } 1275 else 1276 algo_strength |= ca_list[j]->algo_strength & SSL_STRONG_MASK; 1277 } 1278 1279 if (ca_list[j]->valid) 1280 { 1281 /* explicit ciphersuite found; its protocol version 1282 * does not become part of the search pattern!*/ 1283 1284 cipher_id = ca_list[j]->id; 1285 } 1286 else 1287 { 1288 /* not an explicit ciphersuite; only in this case, the 1289 * protocol version is considered part of the search pattern */ 1290 1291 if (ca_list[j]->algorithm_ssl) 1292 { 1293 if (alg_ssl) 1294 { 1295 alg_ssl &= ca_list[j]->algorithm_ssl; 1296 if (!alg_ssl) { found = 0; break; } 1297 } 1298 else 1299 alg_ssl = ca_list[j]->algorithm_ssl; 1300 } 1301 } 1302 1303 if (!multi) break; 1304 } 1305 1306 /* 1307 * Ok, we have the rule, now apply it 1308 */ 1309 if (rule == CIPHER_SPECIAL) 1310 { /* special command */ 1311 ok = 0; 1312 if ((buflen == 8) && 1313 !strncmp(buf, "STRENGTH", 8)) 1314 ok = ssl_cipher_strength_sort(head_p, tail_p); 1315 else 1316 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR, 1317 SSL_R_INVALID_COMMAND); 1318 if (ok == 0) 1319 retval = 0; 1320 /* 1321 * We do not support any "multi" options 1322 * together with "@", so throw away the 1323 * rest of the command, if any left, until 1324 * end or ':' is found. 1325 */ 1326 while ((*l != '\0') && !ITEM_SEP(*l)) 1327 l++; 1328 } 1329 else if (found) 1330 { 1331 ssl_cipher_apply_rule(cipher_id, 1332 alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl, algo_strength, 1333 rule, -1, head_p, tail_p); 1334 } 1335 else 1336 { 1337 while ((*l != '\0') && !ITEM_SEP(*l)) 1338 l++; 1339 } 1340 if (*l == '\0') break; /* done */ 1341 } 1342 1343 return(retval); 1344 } 1345 1346STACK_OF(SSL_CIPHER) *ssl_create_cipher_list(const SSL_METHOD *ssl_method, 1347 STACK_OF(SSL_CIPHER) **cipher_list, 1348 STACK_OF(SSL_CIPHER) **cipher_list_by_id, 1349 const char *rule_str) 1350 { 1351 int ok, num_of_ciphers, num_of_alias_max, num_of_group_aliases; 1352 unsigned long disabled_mkey, disabled_auth, disabled_enc, disabled_mac, disabled_ssl; 1353 STACK_OF(SSL_CIPHER) *cipherstack, *tmp_cipher_list; 1354 const char *rule_p; 1355 CIPHER_ORDER *co_list = NULL, *head = NULL, *tail = NULL, *curr; 1356 const SSL_CIPHER **ca_list = NULL; 1357 1358 /* 1359 * Return with error if nothing to do. 1360 */ 1361 if (rule_str == NULL || cipher_list == NULL || cipher_list_by_id == NULL) 1362 return NULL; 1363 1364 /* 1365 * To reduce the work to do we only want to process the compiled 1366 * in algorithms, so we first get the mask of disabled ciphers. 1367 */ 1368 ssl_cipher_get_disabled(&disabled_mkey, &disabled_auth, &disabled_enc, &disabled_mac, &disabled_ssl); 1369 1370 /* 1371 * Now we have to collect the available ciphers from the compiled 1372 * in ciphers. We cannot get more than the number compiled in, so 1373 * it is used for allocation. 1374 */ 1375 num_of_ciphers = ssl_method->num_ciphers(); 1376#ifdef KSSL_DEBUG 1377 printf("ssl_create_cipher_list() for %d ciphers\n", num_of_ciphers); 1378#endif /* KSSL_DEBUG */ 1379 co_list = (CIPHER_ORDER *)OPENSSL_malloc(sizeof(CIPHER_ORDER) * num_of_ciphers); 1380 if (co_list == NULL) 1381 { 1382 SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST,ERR_R_MALLOC_FAILURE); 1383 return(NULL); /* Failure */ 1384 } 1385 1386 ssl_cipher_collect_ciphers(ssl_method, num_of_ciphers, 1387 disabled_mkey, disabled_auth, disabled_enc, disabled_mac, disabled_ssl, 1388 co_list, &head, &tail); 1389 1390 1391 /* Now arrange all ciphers by preference: */ 1392 1393 /* Everything else being equal, prefer ephemeral ECDH over other key exchange mechanisms */ 1394 ssl_cipher_apply_rule(0, SSL_kEECDH, 0, 0, 0, 0, 0, CIPHER_ADD, -1, &head, &tail); 1395 ssl_cipher_apply_rule(0, SSL_kEECDH, 0, 0, 0, 0, 0, CIPHER_DEL, -1, &head, &tail); 1396 1397 /* AES is our preferred symmetric cipher */ 1398 ssl_cipher_apply_rule(0, 0, 0, SSL_AES, 0, 0, 0, CIPHER_ADD, -1, &head, &tail); 1399 1400 /* Temporarily enable everything else for sorting */ 1401 ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_ADD, -1, &head, &tail); 1402 1403 /* Low priority for MD5 */ 1404 ssl_cipher_apply_rule(0, 0, 0, 0, SSL_MD5, 0, 0, CIPHER_ORD, -1, &head, &tail); 1405 1406 /* Move anonymous ciphers to the end. Usually, these will remain disabled. 1407 * (For applications that allow them, they aren't too bad, but we prefer 1408 * authenticated ciphers.) */ 1409 ssl_cipher_apply_rule(0, 0, SSL_aNULL, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail); 1410 1411 /* Move ciphers without forward secrecy to the end */ 1412 ssl_cipher_apply_rule(0, 0, SSL_aECDH, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail); 1413 /* ssl_cipher_apply_rule(0, 0, SSL_aDH, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail); */ 1414 ssl_cipher_apply_rule(0, SSL_kRSA, 0, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail); 1415 ssl_cipher_apply_rule(0, SSL_kPSK, 0,0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail); 1416 ssl_cipher_apply_rule(0, SSL_kKRB5, 0,0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail); 1417 1418 /* RC4 is sort-of broken -- move the the end */ 1419 ssl_cipher_apply_rule(0, 0, 0, SSL_RC4, 0, 0, 0, CIPHER_ORD, -1, &head, &tail); 1420 1421 /* Now sort by symmetric encryption strength. The above ordering remains 1422 * in force within each class */ 1423 if (!ssl_cipher_strength_sort(&head, &tail)) 1424 { 1425 OPENSSL_free(co_list); 1426 return NULL; 1427 } 1428 1429 /* Now disable everything (maintaining the ordering!) */ 1430 ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_DEL, -1, &head, &tail); 1431 1432 1433 /* 1434 * We also need cipher aliases for selecting based on the rule_str. 1435 * There might be two types of entries in the rule_str: 1) names 1436 * of ciphers themselves 2) aliases for groups of ciphers. 1437 * For 1) we need the available ciphers and for 2) the cipher 1438 * groups of cipher_aliases added together in one list (otherwise 1439 * we would be happy with just the cipher_aliases table). 1440 */ 1441 num_of_group_aliases = sizeof(cipher_aliases) / sizeof(SSL_CIPHER); 1442 num_of_alias_max = num_of_ciphers + num_of_group_aliases + 1; 1443 ca_list = OPENSSL_malloc(sizeof(SSL_CIPHER *) * num_of_alias_max); 1444 if (ca_list == NULL) 1445 { 1446 OPENSSL_free(co_list); 1447 SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST,ERR_R_MALLOC_FAILURE); 1448 return(NULL); /* Failure */ 1449 } 1450 ssl_cipher_collect_aliases(ca_list, num_of_group_aliases, 1451 disabled_mkey, disabled_auth, disabled_enc, 1452 disabled_mac, disabled_ssl, head); 1453 1454 /* 1455 * If the rule_string begins with DEFAULT, apply the default rule 1456 * before using the (possibly available) additional rules. 1457 */ 1458 ok = 1; 1459 rule_p = rule_str; 1460 if (strncmp(rule_str,"DEFAULT",7) == 0) 1461 { 1462 ok = ssl_cipher_process_rulestr(SSL_DEFAULT_CIPHER_LIST, 1463 &head, &tail, ca_list); 1464 rule_p += 7; 1465 if (*rule_p == ':') 1466 rule_p++; 1467 } 1468 1469 if (ok && (strlen(rule_p) > 0)) 1470 ok = ssl_cipher_process_rulestr(rule_p, &head, &tail, ca_list); 1471 1472 OPENSSL_free((void *)ca_list); /* Not needed anymore */ 1473 1474 if (!ok) 1475 { /* Rule processing failure */ 1476 OPENSSL_free(co_list); 1477 return(NULL); 1478 } 1479 1480 /* 1481 * Allocate new "cipherstack" for the result, return with error 1482 * if we cannot get one. 1483 */ 1484 if ((cipherstack = sk_SSL_CIPHER_new_null()) == NULL) 1485 { 1486 OPENSSL_free(co_list); 1487 return(NULL); 1488 } 1489 1490 /* 1491 * The cipher selection for the list is done. The ciphers are added 1492 * to the resulting precedence to the STACK_OF(SSL_CIPHER). 1493 */ 1494 for (curr = head; curr != NULL; curr = curr->next) 1495 { 1496#ifdef OPENSSL_FIPS 1497 if (curr->active && (!FIPS_mode() || curr->cipher->algo_strength & SSL_FIPS)) 1498#else 1499 if (curr->active) 1500#endif 1501 { 1502 sk_SSL_CIPHER_push(cipherstack, curr->cipher); 1503#ifdef CIPHER_DEBUG 1504 printf("<%s>\n",curr->cipher->name); 1505#endif 1506 } 1507 } 1508 OPENSSL_free(co_list); /* Not needed any longer */ 1509 1510 tmp_cipher_list = sk_SSL_CIPHER_dup(cipherstack); 1511 if (tmp_cipher_list == NULL) 1512 { 1513 sk_SSL_CIPHER_free(cipherstack); 1514 return NULL; 1515 } 1516 if (*cipher_list != NULL) 1517 sk_SSL_CIPHER_free(*cipher_list); 1518 *cipher_list = cipherstack; 1519 if (*cipher_list_by_id != NULL) 1520 sk_SSL_CIPHER_free(*cipher_list_by_id); 1521 *cipher_list_by_id = tmp_cipher_list; 1522 (void)sk_SSL_CIPHER_set_cmp_func(*cipher_list_by_id,ssl_cipher_ptr_id_cmp); 1523 1524 sk_SSL_CIPHER_sort(*cipher_list_by_id); 1525 return(cipherstack); 1526 } 1527 1528char *SSL_CIPHER_description(const SSL_CIPHER *cipher, char *buf, int len) 1529 { 1530 int is_export,pkl,kl; 1531 const char *ver,*exp_str; 1532 const char *kx,*au,*enc,*mac; 1533 unsigned long alg_mkey,alg_auth,alg_enc,alg_mac,alg_ssl,alg2; 1534#ifdef KSSL_DEBUG 1535 static const char *format="%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s%s AL=%lx/%lx/%lx/%lx/%lx\n"; 1536#else 1537 static const char *format="%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s%s\n"; 1538#endif /* KSSL_DEBUG */ 1539 1540 alg_mkey = cipher->algorithm_mkey; 1541 alg_auth = cipher->algorithm_auth; 1542 alg_enc = cipher->algorithm_enc; 1543 alg_mac = cipher->algorithm_mac; 1544 alg_ssl = cipher->algorithm_ssl; 1545 1546 alg2=cipher->algorithm2; 1547 1548 is_export=SSL_C_IS_EXPORT(cipher); 1549 pkl=SSL_C_EXPORT_PKEYLENGTH(cipher); 1550 kl=SSL_C_EXPORT_KEYLENGTH(cipher); 1551 exp_str=is_export?" export":""; 1552 1553 if (alg_ssl & SSL_SSLV2) 1554 ver="SSLv2"; 1555 else if (alg_ssl & SSL_SSLV3) 1556 ver="SSLv3"; 1557 else if (alg_ssl & SSL_TLSV1_2) 1558 ver="TLSv1.2"; 1559 else 1560 ver="unknown"; 1561 1562 switch (alg_mkey) 1563 { 1564 case SSL_kRSA: 1565 kx=is_export?(pkl == 512 ? "RSA(512)" : "RSA(1024)"):"RSA"; 1566 break; 1567 case SSL_kDHr: 1568 kx="DH/RSA"; 1569 break; 1570 case SSL_kDHd: 1571 kx="DH/DSS"; 1572 break; 1573 case SSL_kKRB5: 1574 kx="KRB5"; 1575 break; 1576 case SSL_kEDH: 1577 kx=is_export?(pkl == 512 ? "DH(512)" : "DH(1024)"):"DH"; 1578 break; 1579 case SSL_kECDHr: 1580 kx="ECDH/RSA"; 1581 break; 1582 case SSL_kECDHe: 1583 kx="ECDH/ECDSA"; 1584 break; 1585 case SSL_kEECDH: 1586 kx="ECDH"; 1587 break; 1588 case SSL_kPSK: 1589 kx="PSK"; 1590 break; 1591 case SSL_kSRP: 1592 kx="SRP"; 1593 break; 1594 default: 1595 kx="unknown"; 1596 } 1597 1598 switch (alg_auth) 1599 { 1600 case SSL_aRSA: 1601 au="RSA"; 1602 break; 1603 case SSL_aDSS: 1604 au="DSS"; 1605 break; 1606 case SSL_aDH: 1607 au="DH"; 1608 break; 1609 case SSL_aKRB5: 1610 au="KRB5"; 1611 break; 1612 case SSL_aECDH: 1613 au="ECDH"; 1614 break; 1615 case SSL_aNULL: 1616 au="None"; 1617 break; 1618 case SSL_aECDSA: 1619 au="ECDSA"; 1620 break; 1621 case SSL_aPSK: 1622 au="PSK"; 1623 break; 1624 default: 1625 au="unknown"; 1626 break; 1627 } 1628 1629 switch (alg_enc) 1630 { 1631 case SSL_DES: 1632 enc=(is_export && kl == 5)?"DES(40)":"DES(56)"; 1633 break; 1634 case SSL_3DES: 1635 enc="3DES(168)"; 1636 break; 1637 case SSL_RC4: 1638 enc=is_export?(kl == 5 ? "RC4(40)" : "RC4(56)") 1639 :((alg2&SSL2_CF_8_BYTE_ENC)?"RC4(64)":"RC4(128)"); 1640 break; 1641 case SSL_RC2: 1642 enc=is_export?(kl == 5 ? "RC2(40)" : "RC2(56)"):"RC2(128)"; 1643 break; 1644 case SSL_IDEA: 1645 enc="IDEA(128)"; 1646 break; 1647 case SSL_eNULL: 1648 enc="None"; 1649 break; 1650 case SSL_AES128: 1651 enc="AES(128)"; 1652 break; 1653 case SSL_AES256: 1654 enc="AES(256)"; 1655 break; 1656 case SSL_AES128GCM: 1657 enc="AESGCM(128)"; 1658 break; 1659 case SSL_AES256GCM: 1660 enc="AESGCM(256)"; 1661 break; 1662 case SSL_CAMELLIA128: 1663 enc="Camellia(128)"; 1664 break; 1665 case SSL_CAMELLIA256: 1666 enc="Camellia(256)"; 1667 break; 1668 case SSL_SEED: 1669 enc="SEED(128)"; 1670 break; 1671 default: 1672 enc="unknown"; 1673 break; 1674 } 1675 1676 switch (alg_mac) 1677 { 1678 case SSL_MD5: 1679 mac="MD5"; 1680 break; 1681 case SSL_SHA1: 1682 mac="SHA1"; 1683 break; 1684 case SSL_SHA256: 1685 mac="SHA256"; 1686 break; 1687 case SSL_SHA384: 1688 mac="SHA384"; 1689 break; 1690 case SSL_AEAD: 1691 mac="AEAD"; 1692 break; 1693 default: 1694 mac="unknown"; 1695 break; 1696 } 1697 1698 if (buf == NULL) 1699 { 1700 len=128; 1701 buf=OPENSSL_malloc(len); 1702 if (buf == NULL) return("OPENSSL_malloc Error"); 1703 } 1704 else if (len < 128) 1705 return("Buffer too small"); 1706 1707#ifdef KSSL_DEBUG 1708 BIO_snprintf(buf,len,format,cipher->name,ver,kx,au,enc,mac,exp_str,alg_mkey,alg_auth,alg_enc,alg_mac,alg_ssl); 1709#else 1710 BIO_snprintf(buf,len,format,cipher->name,ver,kx,au,enc,mac,exp_str); 1711#endif /* KSSL_DEBUG */ 1712 return(buf); 1713 } 1714 1715char *SSL_CIPHER_get_version(const SSL_CIPHER *c) 1716 { 1717 int i; 1718 1719 if (c == NULL) return("(NONE)"); 1720 i=(int)(c->id>>24L); 1721 if (i == 3) 1722 return("TLSv1/SSLv3"); 1723 else if (i == 2) 1724 return("SSLv2"); 1725 else 1726 return("unknown"); 1727 } 1728 1729/* return the actual cipher being used */ 1730const char *SSL_CIPHER_get_name(const SSL_CIPHER *c) 1731 { 1732 if (c != NULL) 1733 return(c->name); 1734 return("(NONE)"); 1735 } 1736 1737/* number of bits for symmetric cipher */ 1738int SSL_CIPHER_get_bits(const SSL_CIPHER *c, int *alg_bits) 1739 { 1740 int ret=0; 1741 1742 if (c != NULL) 1743 { 1744 if (alg_bits != NULL) *alg_bits = c->alg_bits; 1745 ret = c->strength_bits; 1746 } 1747 return(ret); 1748 } 1749 1750unsigned long SSL_CIPHER_get_id(const SSL_CIPHER *c) 1751 { 1752 return c->id; 1753 } 1754 1755/* return string version of key exchange algorithm */ 1756const char* SSL_CIPHER_authentication_method(const SSL_CIPHER* cipher) 1757 { 1758 switch (cipher->algorithm_mkey) 1759 { 1760 case SSL_kRSA: 1761 return SSL_TXT_RSA; 1762 case SSL_kDHr: 1763 return SSL_TXT_DH "_" SSL_TXT_RSA; 1764 case SSL_kDHd: 1765 return SSL_TXT_DH "_" SSL_TXT_DSS; 1766 case SSL_kEDH: 1767 switch (cipher->algorithm_auth) 1768 { 1769 case SSL_aDSS: 1770 return "DHE_" SSL_TXT_DSS; 1771 case SSL_aRSA: 1772 return "DHE_" SSL_TXT_RSA; 1773 case SSL_aNULL: 1774 return SSL_TXT_DH "_anon"; 1775 default: 1776 return "UNKNOWN"; 1777 } 1778 case SSL_kKRB5: 1779 return SSL_TXT_KRB5; 1780 case SSL_kECDHr: 1781 return SSL_TXT_ECDH "_" SSL_TXT_RSA; 1782 case SSL_kECDHe: 1783 return SSL_TXT_ECDH "_" SSL_TXT_ECDSA; 1784 case SSL_kEECDH: 1785 switch (cipher->algorithm_auth) 1786 { 1787 case SSL_aECDSA: 1788 return "ECDHE_" SSL_TXT_ECDSA; 1789 case SSL_aRSA: 1790 return "ECDHE_" SSL_TXT_RSA; 1791 case SSL_aNULL: 1792 return SSL_TXT_ECDH "_anon"; 1793 default: 1794 return "UNKNOWN"; 1795 } 1796 default: 1797 return "UNKNOWN"; 1798 } 1799 } 1800 1801SSL_COMP *ssl3_comp_find(STACK_OF(SSL_COMP) *sk, int n) 1802 { 1803 SSL_COMP *ctmp; 1804 int i,nn; 1805 1806 if ((n == 0) || (sk == NULL)) return(NULL); 1807 nn=sk_SSL_COMP_num(sk); 1808 for (i=0; i<nn; i++) 1809 { 1810 ctmp=sk_SSL_COMP_value(sk,i); 1811 if (ctmp->id == n) 1812 return(ctmp); 1813 } 1814 return(NULL); 1815 } 1816 1817#ifdef OPENSSL_NO_COMP 1818void *SSL_COMP_get_compression_methods(void) 1819 { 1820 return NULL; 1821 } 1822int SSL_COMP_add_compression_method(int id, void *cm) 1823 { 1824 return 1; 1825 } 1826 1827const char *SSL_COMP_get_name(const void *comp) 1828 { 1829 return NULL; 1830 } 1831#else 1832STACK_OF(SSL_COMP) *SSL_COMP_get_compression_methods(void) 1833 { 1834 load_builtin_compressions(); 1835 return(ssl_comp_methods); 1836 } 1837 1838int SSL_COMP_add_compression_method(int id, COMP_METHOD *cm) 1839 { 1840 SSL_COMP *comp; 1841 1842 if (cm == NULL || cm->type == NID_undef) 1843 return 1; 1844 1845 /* According to draft-ietf-tls-compression-04.txt, the 1846 compression number ranges should be the following: 1847 1848 0 to 63: methods defined by the IETF 1849 64 to 192: external party methods assigned by IANA 1850 193 to 255: reserved for private use */ 1851 if (id < 193 || id > 255) 1852 { 1853 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,SSL_R_COMPRESSION_ID_NOT_WITHIN_PRIVATE_RANGE); 1854 return 0; 1855 } 1856 1857 MemCheck_off(); 1858 comp=(SSL_COMP *)OPENSSL_malloc(sizeof(SSL_COMP)); 1859 comp->id=id; 1860 comp->method=cm; 1861 load_builtin_compressions(); 1862 if (ssl_comp_methods 1863 && sk_SSL_COMP_find(ssl_comp_methods,comp) >= 0) 1864 { 1865 OPENSSL_free(comp); 1866 MemCheck_on(); 1867 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,SSL_R_DUPLICATE_COMPRESSION_ID); 1868 return(1); 1869 } 1870 else if ((ssl_comp_methods == NULL) 1871 || !sk_SSL_COMP_push(ssl_comp_methods,comp)) 1872 { 1873 OPENSSL_free(comp); 1874 MemCheck_on(); 1875 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,ERR_R_MALLOC_FAILURE); 1876 return(1); 1877 } 1878 else 1879 { 1880 MemCheck_on(); 1881 return(0); 1882 } 1883 } 1884 1885const char *SSL_COMP_get_name(const COMP_METHOD *comp) 1886 { 1887 if (comp) 1888 return comp->name; 1889 return NULL; 1890 } 1891 1892#endif 1893