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_NUM_IDX 12 166 167 168 static const EVP_CIPHER *ssl_cipher_methods[SSL_ENC_NUM_IDX]={ 169 NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL, 170 }; 171 172 #define SSL_COMP_NULL_IDX 0 173 #define SSL_COMP_ZLIB_IDX 1 174 #define SSL_COMP_NUM_IDX 2 175 176 static STACK_OF(SSL_COMP) *ssl_comp_methods=NULL; 177 178 #define SSL_MD_MD5_IDX 0 179 #define SSL_MD_SHA1_IDX 1 180 #define SSL_MD_GOST94_IDX 2 181 #define SSL_MD_GOST89MAC_IDX 3 182 #define SSL_MD_SHA256_IDX 4 183 /*Constant SSL_MAX_DIGEST equal to size of digests array should be 184 * defined in the 185 * ssl_locl.h */ 186 #define SSL_MD_NUM_IDX SSL_MAX_DIGEST 187 static const EVP_MD *ssl_digest_methods[SSL_MD_NUM_IDX]={ 188 NULL,NULL,NULL,NULL,NULL 189 }; 190 /* PKEY_TYPE for GOST89MAC is known in advance, but, because 191 * implementation is engine-provided, we'll fill it only if 192 * corresponding EVP_PKEY_METHOD is found 193 */ 194 static int ssl_mac_pkey_id[SSL_MD_NUM_IDX]={ 195 EVP_PKEY_HMAC,EVP_PKEY_HMAC,EVP_PKEY_HMAC,NID_undef,EVP_PKEY_HMAC 196 }; 197 198 static int ssl_mac_secret_size[SSL_MD_NUM_IDX]={ 199 0,0,0,0,0 200 }; 201 202 static int ssl_handshake_digest_flag[SSL_MD_NUM_IDX]={ 203 SSL_HANDSHAKE_MAC_MD5,SSL_HANDSHAKE_MAC_SHA, 204 SSL_HANDSHAKE_MAC_GOST94, 0, SSL_HANDSHAKE_MAC_SHA256 205 }; 206 207 #define CIPHER_ADD 1 208 #define CIPHER_KILL 2 209 #define CIPHER_DEL 3 210 #define CIPHER_ORD 4 211 #define CIPHER_SPECIAL 5 212 213 typedef struct cipher_order_st 214 { 215 const SSL_CIPHER *cipher; 216 int active; 217 int dead; 218 struct cipher_order_st *next,*prev; 219 } CIPHER_ORDER; 220 221 static const SSL_CIPHER cipher_aliases[]={ 222 /* "ALL" doesn't include eNULL (must be specifically enabled) */ 223 {0,SSL_TXT_ALL,0, 0,0,~SSL_eNULL,0,0,0,0,0,0}, 224 /* "COMPLEMENTOFALL" */ 225 {0,SSL_TXT_CMPALL,0, 0,0,SSL_eNULL,0,0,0,0,0,0}, 226 227 /* "COMPLEMENTOFDEFAULT" (does *not* include ciphersuites not found in ALL!) */ 228 {0,SSL_TXT_CMPDEF,0, SSL_kEDH|SSL_kEECDH,SSL_aNULL,~SSL_eNULL,0,0,0,0,0,0}, 229 230 /* key exchange aliases 231 * (some of those using only a single bit here combine 232 * multiple key exchange algs according to the RFCs, 233 * e.g. kEDH combines DHE_DSS and DHE_RSA) */ 234 {0,SSL_TXT_kRSA,0, SSL_kRSA, 0,0,0,0,0,0,0,0}, 235 236 {0,SSL_TXT_kDHr,0, SSL_kDHr, 0,0,0,0,0,0,0,0}, /* no such ciphersuites supported! */ 237 {0,SSL_TXT_kDHd,0, SSL_kDHd, 0,0,0,0,0,0,0,0}, /* no such ciphersuites supported! */ 238 {0,SSL_TXT_kDH,0, SSL_kDHr|SSL_kDHd,0,0,0,0,0,0,0,0}, /* no such ciphersuites supported! */ 239 {0,SSL_TXT_kEDH,0, SSL_kEDH, 0,0,0,0,0,0,0,0}, 240 {0,SSL_TXT_DH,0, SSL_kDHr|SSL_kDHd|SSL_kEDH,0,0,0,0,0,0,0,0}, 241 242 {0,SSL_TXT_kKRB5,0, SSL_kKRB5, 0,0,0,0,0,0,0,0}, 243 244 {0,SSL_TXT_kECDHr,0, SSL_kECDHr,0,0,0,0,0,0,0,0}, 245 {0,SSL_TXT_kECDHe,0, SSL_kECDHe,0,0,0,0,0,0,0,0}, 246 {0,SSL_TXT_kECDH,0, SSL_kECDHr|SSL_kECDHe,0,0,0,0,0,0,0,0}, 247 {0,SSL_TXT_kEECDH,0, SSL_kEECDH,0,0,0,0,0,0,0,0}, 248 {0,SSL_TXT_ECDH,0, SSL_kECDHr|SSL_kECDHe|SSL_kEECDH,0,0,0,0,0,0,0,0}, 249 250 {0,SSL_TXT_kPSK,0, SSL_kPSK, 0,0,0,0,0,0,0,0}, 251 {0,SSL_TXT_kSRP,0, SSL_kSRP, 0,0,0,0,0,0,0,0}, 252 {0,SSL_TXT_kGOST,0, SSL_kGOST,0,0,0,0,0,0,0,0}, 253 254 /* server authentication aliases */ 255 {0,SSL_TXT_aRSA,0, 0,SSL_aRSA, 0,0,0,0,0,0,0}, 256 {0,SSL_TXT_aDSS,0, 0,SSL_aDSS, 0,0,0,0,0,0,0}, 257 {0,SSL_TXT_DSS,0, 0,SSL_aDSS, 0,0,0,0,0,0,0}, 258 {0,SSL_TXT_aKRB5,0, 0,SSL_aKRB5, 0,0,0,0,0,0,0}, 259 {0,SSL_TXT_aNULL,0, 0,SSL_aNULL, 0,0,0,0,0,0,0}, 260 {0,SSL_TXT_aDH,0, 0,SSL_aDH, 0,0,0,0,0,0,0}, /* no such ciphersuites supported! */ 261 {0,SSL_TXT_aECDH,0, 0,SSL_aECDH, 0,0,0,0,0,0,0}, 262 {0,SSL_TXT_aECDSA,0, 0,SSL_aECDSA,0,0,0,0,0,0,0}, 263 {0,SSL_TXT_ECDSA,0, 0,SSL_aECDSA, 0,0,0,0,0,0,0}, 264 {0,SSL_TXT_aPSK,0, 0,SSL_aPSK, 0,0,0,0,0,0,0}, 265 {0,SSL_TXT_aGOST94,0,0,SSL_aGOST94,0,0,0,0,0,0,0}, 266 {0,SSL_TXT_aGOST01,0,0,SSL_aGOST01,0,0,0,0,0,0,0}, 267 {0,SSL_TXT_aGOST,0,0,SSL_aGOST94|SSL_aGOST01,0,0,0,0,0,0,0}, 268 269 /* aliases combining key exchange and server authentication */ 270 {0,SSL_TXT_EDH,0, SSL_kEDH,~SSL_aNULL,0,0,0,0,0,0,0}, 271 {0,SSL_TXT_EECDH,0, SSL_kEECDH,~SSL_aNULL,0,0,0,0,0,0,0}, 272 {0,SSL_TXT_NULL,0, 0,0,SSL_eNULL, 0,0,0,0,0,0}, 273 {0,SSL_TXT_KRB5,0, SSL_kKRB5,SSL_aKRB5,0,0,0,0,0,0,0}, 274 {0,SSL_TXT_RSA,0, SSL_kRSA,SSL_aRSA,0,0,0,0,0,0,0}, 275 {0,SSL_TXT_ADH,0, SSL_kEDH,SSL_aNULL,0,0,0,0,0,0,0}, 276 {0,SSL_TXT_AECDH,0, SSL_kEECDH,SSL_aNULL,0,0,0,0,0,0,0}, 277 {0,SSL_TXT_PSK,0, SSL_kPSK,SSL_aPSK,0,0,0,0,0,0,0}, 278 {0,SSL_TXT_SRP,0, SSL_kSRP,0,0,0,0,0,0,0,0}, 279 280 281 /* symmetric encryption aliases */ 282 {0,SSL_TXT_DES,0, 0,0,SSL_DES, 0,0,0,0,0,0}, 283 {0,SSL_TXT_3DES,0, 0,0,SSL_3DES, 0,0,0,0,0,0}, 284 {0,SSL_TXT_RC4,0, 0,0,SSL_RC4, 0,0,0,0,0,0}, 285 {0,SSL_TXT_RC2,0, 0,0,SSL_RC2, 0,0,0,0,0,0}, 286 {0,SSL_TXT_IDEA,0, 0,0,SSL_IDEA, 0,0,0,0,0,0}, 287 {0,SSL_TXT_SEED,0, 0,0,SSL_SEED, 0,0,0,0,0,0}, 288 {0,SSL_TXT_eNULL,0, 0,0,SSL_eNULL, 0,0,0,0,0,0}, 289 {0,SSL_TXT_AES128,0, 0,0,SSL_AES128,0,0,0,0,0,0}, 290 {0,SSL_TXT_AES256,0, 0,0,SSL_AES256,0,0,0,0,0,0}, 291 {0,SSL_TXT_AES,0, 0,0,SSL_AES128|SSL_AES256,0,0,0,0,0,0}, 292 {0,SSL_TXT_CAMELLIA128,0,0,0,SSL_CAMELLIA128,0,0,0,0,0,0}, 293 {0,SSL_TXT_CAMELLIA256,0,0,0,SSL_CAMELLIA256,0,0,0,0,0,0}, 294 {0,SSL_TXT_CAMELLIA ,0,0,0,SSL_CAMELLIA128|SSL_CAMELLIA256,0,0,0,0,0,0}, 295 296 /* MAC aliases */ 297 {0,SSL_TXT_MD5,0, 0,0,0,SSL_MD5, 0,0,0,0,0}, 298 {0,SSL_TXT_SHA1,0, 0,0,0,SSL_SHA1, 0,0,0,0,0}, 299 {0,SSL_TXT_SHA,0, 0,0,0,SSL_SHA1, 0,0,0,0,0}, 300 {0,SSL_TXT_GOST94,0, 0,0,0,SSL_GOST94, 0,0,0,0,0}, 301 {0,SSL_TXT_GOST89MAC,0, 0,0,0,SSL_GOST89MAC, 0,0,0,0,0}, 302 {0,SSL_TXT_SHA256,0, 0,0,0,SSL_SHA256, 0,0,0,0,0}, 303 304 /* protocol version aliases */ 305 {0,SSL_TXT_SSLV2,0, 0,0,0,0,SSL_SSLV2, 0,0,0,0}, 306 {0,SSL_TXT_SSLV3,0, 0,0,0,0,SSL_SSLV3, 0,0,0,0}, 307 {0,SSL_TXT_TLSV1,0, 0,0,0,0,SSL_TLSV1, 0,0,0,0}, 308 309 /* export flag */ 310 {0,SSL_TXT_EXP,0, 0,0,0,0,0,SSL_EXPORT,0,0,0}, 311 {0,SSL_TXT_EXPORT,0, 0,0,0,0,0,SSL_EXPORT,0,0,0}, 312 313 /* strength classes */ 314 {0,SSL_TXT_EXP40,0, 0,0,0,0,0,SSL_EXP40, 0,0,0}, 315 {0,SSL_TXT_EXP56,0, 0,0,0,0,0,SSL_EXP56, 0,0,0}, 316 {0,SSL_TXT_LOW,0, 0,0,0,0,0,SSL_LOW, 0,0,0}, 317 {0,SSL_TXT_MEDIUM,0, 0,0,0,0,0,SSL_MEDIUM,0,0,0}, 318 {0,SSL_TXT_HIGH,0, 0,0,0,0,0,SSL_HIGH, 0,0,0}, 319 /* FIPS 140-2 approved ciphersuite */ 320 {0,SSL_TXT_FIPS,0, 0,0,~SSL_eNULL,0,0,SSL_FIPS, 0,0,0}, 321 }; 322 /* Search for public key algorithm with given name and 323 * return its pkey_id if it is available. Otherwise return 0 324 */ 325 #ifdef OPENSSL_NO_ENGINE 326 327 static int get_optional_pkey_id(const char *pkey_name) 328 { 329 const EVP_PKEY_ASN1_METHOD *ameth; 330 int pkey_id=0; 331 ameth = EVP_PKEY_asn1_find_str(NULL,pkey_name,-1); 332 if (ameth) 333 { 334 EVP_PKEY_asn1_get0_info(&pkey_id, NULL,NULL,NULL,NULL,ameth); 335 } 336 return pkey_id; 337 } 338 339 #else 340 341 static int get_optional_pkey_id(const char *pkey_name) 342 { 343 const EVP_PKEY_ASN1_METHOD *ameth; 344 ENGINE *tmpeng = NULL; 345 int pkey_id=0; 346 ameth = EVP_PKEY_asn1_find_str(&tmpeng,pkey_name,-1); 347 if (ameth) 348 { 349 EVP_PKEY_asn1_get0_info(&pkey_id, NULL,NULL,NULL,NULL,ameth); 350 } 351 if (tmpeng) ENGINE_finish(tmpeng); 352 return pkey_id; 353 } 354 355 #endif 356 357 void ssl_load_ciphers(void) 358 { 359 ssl_cipher_methods[SSL_ENC_DES_IDX]= 360 EVP_get_cipherbyname(SN_des_cbc); 361 ssl_cipher_methods[SSL_ENC_3DES_IDX]= 362 EVP_get_cipherbyname(SN_des_ede3_cbc); 363 ssl_cipher_methods[SSL_ENC_RC4_IDX]= 364 EVP_get_cipherbyname(SN_rc4); 365 ssl_cipher_methods[SSL_ENC_RC2_IDX]= 366 EVP_get_cipherbyname(SN_rc2_cbc); 367 #ifndef OPENSSL_NO_IDEA 368 ssl_cipher_methods[SSL_ENC_IDEA_IDX]= 369 EVP_get_cipherbyname(SN_idea_cbc); 370 #else 371 ssl_cipher_methods[SSL_ENC_IDEA_IDX]= NULL; 372 #endif 373 ssl_cipher_methods[SSL_ENC_AES128_IDX]= 374 EVP_get_cipherbyname(SN_aes_128_cbc); 375 ssl_cipher_methods[SSL_ENC_AES256_IDX]= 376 EVP_get_cipherbyname(SN_aes_256_cbc); 377 ssl_cipher_methods[SSL_ENC_CAMELLIA128_IDX]= 378 EVP_get_cipherbyname(SN_camellia_128_cbc); 379 ssl_cipher_methods[SSL_ENC_CAMELLIA256_IDX]= 380 EVP_get_cipherbyname(SN_camellia_256_cbc); 381 ssl_cipher_methods[SSL_ENC_GOST89_IDX]= 382 EVP_get_cipherbyname(SN_gost89_cnt); 383 ssl_cipher_methods[SSL_ENC_SEED_IDX]= 384 EVP_get_cipherbyname(SN_seed_cbc); 385 386 ssl_digest_methods[SSL_MD_MD5_IDX]= 387 EVP_get_digestbyname(SN_md5); 388 ssl_mac_secret_size[SSL_MD_MD5_IDX]= 389 EVP_MD_size(ssl_digest_methods[SSL_MD_MD5_IDX]); 390 OPENSSL_assert(ssl_mac_secret_size[SSL_MD_MD5_IDX] >= 0); 391 ssl_digest_methods[SSL_MD_SHA1_IDX]= 392 EVP_get_digestbyname(SN_sha1); 393 ssl_mac_secret_size[SSL_MD_SHA1_IDX]= 394 EVP_MD_size(ssl_digest_methods[SSL_MD_SHA1_IDX]); 395 OPENSSL_assert(ssl_mac_secret_size[SSL_MD_SHA1_IDX] >= 0); 396 ssl_digest_methods[SSL_MD_GOST94_IDX]= 397 EVP_get_digestbyname(SN_id_GostR3411_94); 398 if (ssl_digest_methods[SSL_MD_GOST94_IDX]) 399 { 400 ssl_mac_secret_size[SSL_MD_GOST94_IDX]= 401 EVP_MD_size(ssl_digest_methods[SSL_MD_GOST94_IDX]); 402 OPENSSL_assert(ssl_mac_secret_size[SSL_MD_GOST94_IDX] >= 0); 403 } 404 ssl_digest_methods[SSL_MD_GOST89MAC_IDX]= 405 EVP_get_digestbyname(SN_id_Gost28147_89_MAC); 406 ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX] = get_optional_pkey_id("gost-mac"); 407 if (ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX]) { 408 ssl_mac_secret_size[SSL_MD_GOST89MAC_IDX]=32; 409 } 410 411 ssl_digest_methods[SSL_MD_SHA256_IDX]= 412 EVP_get_digestbyname(SN_sha256); 413 ssl_mac_secret_size[SSL_MD_SHA256_IDX]= 414 EVP_MD_size(ssl_digest_methods[SSL_MD_SHA256_IDX]); 415 } 416 #ifndef OPENSSL_NO_COMP 417 418 static int sk_comp_cmp(const SSL_COMP * const *a, 419 const SSL_COMP * const *b) 420 { 421 return((*a)->id-(*b)->id); 422 } 423 424 static void load_builtin_compressions(void) 425 { 426 int got_write_lock = 0; 427 428 CRYPTO_r_lock(CRYPTO_LOCK_SSL); 429 if (ssl_comp_methods == NULL) 430 { 431 CRYPTO_r_unlock(CRYPTO_LOCK_SSL); 432 CRYPTO_w_lock(CRYPTO_LOCK_SSL); 433 got_write_lock = 1; 434 435 if (ssl_comp_methods == NULL) 436 { 437 SSL_COMP *comp = NULL; 438 439 MemCheck_off(); 440 ssl_comp_methods=sk_SSL_COMP_new(sk_comp_cmp); 441 if (ssl_comp_methods != NULL) 442 { 443 comp=(SSL_COMP *)OPENSSL_malloc(sizeof(SSL_COMP)); 444 if (comp != NULL) 445 { 446 comp->method=COMP_zlib(); 447 if (comp->method 448 && comp->method->type == NID_undef) 449 OPENSSL_free(comp); 450 else 451 { 452 comp->id=SSL_COMP_ZLIB_IDX; 453 comp->name=comp->method->name; 454 sk_SSL_COMP_push(ssl_comp_methods,comp); 455 } 456 } 457 } 458 MemCheck_on(); 459 } 460 } 461 462 if (got_write_lock) 463 CRYPTO_w_unlock(CRYPTO_LOCK_SSL); 464 else 465 CRYPTO_r_unlock(CRYPTO_LOCK_SSL); 466 } 467 #endif 468 469 int ssl_cipher_get_evp(const SSL_SESSION *s, const EVP_CIPHER **enc, 470 const EVP_MD **md, int *mac_pkey_type, int *mac_secret_size,SSL_COMP **comp) 471 { 472 int i; 473 const SSL_CIPHER *c; 474 475 c=s->cipher; 476 if (c == NULL) return(0); 477 if (comp != NULL) 478 { 479 SSL_COMP ctmp; 480 #ifndef OPENSSL_NO_COMP 481 load_builtin_compressions(); 482 #endif 483 484 *comp=NULL; 485 ctmp.id=s->compress_meth; 486 if (ssl_comp_methods != NULL) 487 { 488 i=sk_SSL_COMP_find(ssl_comp_methods,&ctmp); 489 if (i >= 0) 490 *comp=sk_SSL_COMP_value(ssl_comp_methods,i); 491 else 492 *comp=NULL; 493 } 494 } 495 496 if ((enc == NULL) || (md == NULL)) return(0); 497 498 switch (c->algorithm_enc) 499 { 500 case SSL_DES: 501 i=SSL_ENC_DES_IDX; 502 break; 503 case SSL_3DES: 504 i=SSL_ENC_3DES_IDX; 505 break; 506 case SSL_RC4: 507 i=SSL_ENC_RC4_IDX; 508 break; 509 case SSL_RC2: 510 i=SSL_ENC_RC2_IDX; 511 break; 512 case SSL_IDEA: 513 i=SSL_ENC_IDEA_IDX; 514 break; 515 case SSL_eNULL: 516 i=SSL_ENC_NULL_IDX; 517 break; 518 case SSL_AES128: 519 i=SSL_ENC_AES128_IDX; 520 break; 521 case SSL_AES256: 522 i=SSL_ENC_AES256_IDX; 523 break; 524 case SSL_CAMELLIA128: 525 i=SSL_ENC_CAMELLIA128_IDX; 526 break; 527 case SSL_CAMELLIA256: 528 i=SSL_ENC_CAMELLIA256_IDX; 529 break; 530 case SSL_eGOST2814789CNT: 531 i=SSL_ENC_GOST89_IDX; 532 break; 533 case SSL_SEED: 534 i=SSL_ENC_SEED_IDX; 535 break; 536 default: 537 i= -1; 538 break; 539 } 540 541 if ((i < 0) || (i >= SSL_ENC_NUM_IDX)) 542 *enc=NULL; 543 else 544 { 545 if (i == SSL_ENC_NULL_IDX) 546 *enc=EVP_enc_null(); 547 else 548 *enc=ssl_cipher_methods[i]; 549 } 550 551 switch (c->algorithm_mac) 552 { 553 case SSL_MD5: 554 i=SSL_MD_MD5_IDX; 555 break; 556 case SSL_SHA1: 557 i=SSL_MD_SHA1_IDX; 558 break; 559 case SSL_SHA256: 560 i=SSL_MD_SHA256_IDX; 561 break; 562 case SSL_GOST94: 563 i = SSL_MD_GOST94_IDX; 564 break; 565 case SSL_GOST89MAC: 566 i = SSL_MD_GOST89MAC_IDX; 567 break; 568 default: 569 i= -1; 570 break; 571 } 572 if ((i < 0) || (i >= SSL_MD_NUM_IDX)) 573 { 574 *md=NULL; 575 if (mac_pkey_type!=NULL) *mac_pkey_type = NID_undef; 576 if (mac_secret_size!=NULL) *mac_secret_size = 0; 577 578 } 579 else 580 { 581 *md=ssl_digest_methods[i]; 582 if (mac_pkey_type!=NULL) *mac_pkey_type = ssl_mac_pkey_id[i]; 583 if (mac_secret_size!=NULL) *mac_secret_size = ssl_mac_secret_size[i]; 584 } 585 586 if ((*enc != NULL) && (*md != NULL) && (!mac_pkey_type||*mac_pkey_type != NID_undef)) 587 return(1); 588 else 589 return(0); 590 } 591 592 int ssl_get_handshake_digest(int idx, long *mask, const EVP_MD **md) 593 { 594 if (idx <0||idx>=SSL_MD_NUM_IDX) 595 { 596 return 0; 597 } 598 *mask = ssl_handshake_digest_flag[idx]; 599 if (*mask) 600 *md = ssl_digest_methods[idx]; 601 else 602 *md = NULL; 603 return 1; 604 } 605 606 #define ITEM_SEP(a) \ 607 (((a) == ':') || ((a) == ' ') || ((a) == ';') || ((a) == ',')) 608 609 static void ll_append_tail(CIPHER_ORDER **head, CIPHER_ORDER *curr, 610 CIPHER_ORDER **tail) 611 { 612 if (curr == *tail) return; 613 if (curr == *head) 614 *head=curr->next; 615 if (curr->prev != NULL) 616 curr->prev->next=curr->next; 617 if (curr->next != NULL) 618 curr->next->prev=curr->prev; 619 (*tail)->next=curr; 620 curr->prev= *tail; 621 curr->next=NULL; 622 *tail=curr; 623 } 624 625 static void ll_append_head(CIPHER_ORDER **head, CIPHER_ORDER *curr, 626 CIPHER_ORDER **tail) 627 { 628 if (curr == *head) return; 629 if (curr == *tail) 630 *tail=curr->prev; 631 if (curr->next != NULL) 632 curr->next->prev=curr->prev; 633 if (curr->prev != NULL) 634 curr->prev->next=curr->next; 635 (*head)->prev=curr; 636 curr->next= *head; 637 curr->prev=NULL; 638 *head=curr; 639 } 640 641 static void ssl_cipher_get_disabled(unsigned long *mkey, unsigned long *auth, unsigned long *enc, unsigned long *mac, unsigned long *ssl) 642 { 643 *mkey = 0; 644 *auth = 0; 645 *enc = 0; 646 *mac = 0; 647 *ssl = 0; 648 649 #ifdef OPENSSL_NO_RSA 650 *mkey |= SSL_kRSA; 651 *auth |= SSL_aRSA; 652 #endif 653 #ifdef OPENSSL_NO_DSA 654 *auth |= SSL_aDSS; 655 #endif 656 *mkey |= SSL_kDHr|SSL_kDHd; /* no such ciphersuites supported! */ 657 *auth |= SSL_aDH; 658 #ifdef OPENSSL_NO_DH 659 *mkey |= SSL_kDHr|SSL_kDHd|SSL_kEDH; 660 *auth |= SSL_aDH; 661 #endif 662 #ifdef OPENSSL_NO_KRB5 663 *mkey |= SSL_kKRB5; 664 *auth |= SSL_aKRB5; 665 #endif 666 #ifdef OPENSSL_NO_ECDSA 667 *auth |= SSL_aECDSA; 668 #endif 669 #ifdef OPENSSL_NO_ECDH 670 *mkey |= SSL_kECDHe|SSL_kECDHr; 671 *auth |= SSL_aECDH; 672 #endif 673 #ifdef OPENSSL_NO_PSK 674 *mkey |= SSL_kPSK; 675 *auth |= SSL_aPSK; 676 #endif 677 #ifdef OPENSSL_NO_SRP 678 *mkey |= SSL_kSRP; 679 #endif 680 /* Check for presence of GOST 34.10 algorithms, and if they 681 * do not present, disable appropriate auth and key exchange */ 682 if (!get_optional_pkey_id("gost94")) { 683 *auth |= SSL_aGOST94; 684 } 685 if (!get_optional_pkey_id("gost2001")) { 686 *auth |= SSL_aGOST01; 687 } 688 /* Disable GOST key exchange if no GOST signature algs are available * */ 689 if ((*auth & (SSL_aGOST94|SSL_aGOST01)) == (SSL_aGOST94|SSL_aGOST01)) { 690 *mkey |= SSL_kGOST; 691 } 692 #ifdef SSL_FORBID_ENULL 693 *enc |= SSL_eNULL; 694 #endif 695 696 697 698 *enc |= (ssl_cipher_methods[SSL_ENC_DES_IDX ] == NULL) ? SSL_DES :0; 699 *enc |= (ssl_cipher_methods[SSL_ENC_3DES_IDX] == NULL) ? SSL_3DES:0; 700 *enc |= (ssl_cipher_methods[SSL_ENC_RC4_IDX ] == NULL) ? SSL_RC4 :0; 701 *enc |= (ssl_cipher_methods[SSL_ENC_RC2_IDX ] == NULL) ? SSL_RC2 :0; 702 *enc |= (ssl_cipher_methods[SSL_ENC_IDEA_IDX] == NULL) ? SSL_IDEA:0; 703 *enc |= (ssl_cipher_methods[SSL_ENC_AES128_IDX] == NULL) ? SSL_AES128:0; 704 *enc |= (ssl_cipher_methods[SSL_ENC_AES256_IDX] == NULL) ? SSL_AES256:0; 705 *enc |= (ssl_cipher_methods[SSL_ENC_CAMELLIA128_IDX] == NULL) ? SSL_CAMELLIA128:0; 706 *enc |= (ssl_cipher_methods[SSL_ENC_CAMELLIA256_IDX] == NULL) ? SSL_CAMELLIA256:0; 707 *enc |= (ssl_cipher_methods[SSL_ENC_GOST89_IDX] == NULL) ? SSL_eGOST2814789CNT:0; 708 *enc |= (ssl_cipher_methods[SSL_ENC_SEED_IDX] == NULL) ? SSL_SEED:0; 709 710 *mac |= (ssl_digest_methods[SSL_MD_MD5_IDX ] == NULL) ? SSL_MD5 :0; 711 *mac |= (ssl_digest_methods[SSL_MD_SHA1_IDX] == NULL) ? SSL_SHA1:0; 712 *mac |= (ssl_digest_methods[SSL_MD_SHA256_IDX] == NULL) ? SSL_SHA256:0; 713 *mac |= (ssl_digest_methods[SSL_MD_GOST94_IDX] == NULL) ? SSL_GOST94:0; 714 *mac |= (ssl_digest_methods[SSL_MD_GOST89MAC_IDX] == NULL || ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX]==NID_undef)? SSL_GOST89MAC:0; 715 716 } 717 718 static void ssl_cipher_collect_ciphers(const SSL_METHOD *ssl_method, 719 int num_of_ciphers, 720 unsigned long disabled_mkey, unsigned long disabled_auth, 721 unsigned long disabled_enc, unsigned long disabled_mac, 722 unsigned long disabled_ssl, 723 CIPHER_ORDER *co_list, 724 CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p) 725 { 726 int i, co_list_num; 727 const SSL_CIPHER *c; 728 729 /* 730 * We have num_of_ciphers descriptions compiled in, depending on the 731 * method selected (SSLv2 and/or SSLv3, TLSv1 etc). 732 * These will later be sorted in a linked list with at most num 733 * entries. 734 */ 735 736 /* Get the initial list of ciphers */ 737 co_list_num = 0; /* actual count of ciphers */ 738 for (i = 0; i < num_of_ciphers; i++) 739 { 740 c = ssl_method->get_cipher(i); 741 /* drop those that use any of that is not available */ 742 if ((c != NULL) && c->valid && 743 #ifdef OPENSSL_FIPS 744 (!FIPS_mode() || (c->algo_strength & SSL_FIPS)) && 745 #endif 746 !(c->algorithm_mkey & disabled_mkey) && 747 !(c->algorithm_auth & disabled_auth) && 748 !(c->algorithm_enc & disabled_enc) && 749 !(c->algorithm_mac & disabled_mac) && 750 !(c->algorithm_ssl & disabled_ssl)) 751 { 752 co_list[co_list_num].cipher = c; 753 co_list[co_list_num].next = NULL; 754 co_list[co_list_num].prev = NULL; 755 co_list[co_list_num].active = 0; 756 co_list_num++; 757 #ifdef KSSL_DEBUG 758 printf("\t%d: %s %lx %lx %lx\n",i,c->name,c->id,c->algorithm_mkey,c->algorithm_auth); 759 #endif /* KSSL_DEBUG */ 760 /* 761 if (!sk_push(ca_list,(char *)c)) goto err; 762 */ 763 } 764 } 765 766 /* 767 * Prepare linked list from list entries 768 */ 769 if (co_list_num > 0) 770 { 771 co_list[0].prev = NULL; 772 773 if (co_list_num > 1) 774 { 775 co_list[0].next = &co_list[1]; 776 777 for (i = 1; i < co_list_num - 1; i++) 778 { 779 co_list[i].prev = &co_list[i - 1]; 780 co_list[i].next = &co_list[i + 1]; 781 } 782 783 co_list[co_list_num - 1].prev = &co_list[co_list_num - 2]; 784 } 785 786 co_list[co_list_num - 1].next = NULL; 787 788 *head_p = &co_list[0]; 789 *tail_p = &co_list[co_list_num - 1]; 790 } 791 } 792 793 static void ssl_cipher_collect_aliases(const SSL_CIPHER **ca_list, 794 int num_of_group_aliases, 795 unsigned long disabled_mkey, unsigned long disabled_auth, 796 unsigned long disabled_enc, unsigned long disabled_mac, 797 unsigned long disabled_ssl, 798 CIPHER_ORDER *head) 799 { 800 CIPHER_ORDER *ciph_curr; 801 const SSL_CIPHER **ca_curr; 802 int i; 803 unsigned long mask_mkey = ~disabled_mkey; 804 unsigned long mask_auth = ~disabled_auth; 805 unsigned long mask_enc = ~disabled_enc; 806 unsigned long mask_mac = ~disabled_mac; 807 unsigned long mask_ssl = ~disabled_ssl; 808 809 /* 810 * First, add the real ciphers as already collected 811 */ 812 ciph_curr = head; 813 ca_curr = ca_list; 814 while (ciph_curr != NULL) 815 { 816 *ca_curr = ciph_curr->cipher; 817 ca_curr++; 818 ciph_curr = ciph_curr->next; 819 } 820 821 /* 822 * Now we add the available ones from the cipher_aliases[] table. 823 * They represent either one or more algorithms, some of which 824 * in any affected category must be supported (set in enabled_mask), 825 * or represent a cipher strength value (will be added in any case because algorithms=0). 826 */ 827 for (i = 0; i < num_of_group_aliases; i++) 828 { 829 unsigned long algorithm_mkey = cipher_aliases[i].algorithm_mkey; 830 unsigned long algorithm_auth = cipher_aliases[i].algorithm_auth; 831 unsigned long algorithm_enc = cipher_aliases[i].algorithm_enc; 832 unsigned long algorithm_mac = cipher_aliases[i].algorithm_mac; 833 unsigned long algorithm_ssl = cipher_aliases[i].algorithm_ssl; 834 835 if (algorithm_mkey) 836 if ((algorithm_mkey & mask_mkey) == 0) 837 continue; 838 839 if (algorithm_auth) 840 if ((algorithm_auth & mask_auth) == 0) 841 continue; 842 843 if (algorithm_enc) 844 if ((algorithm_enc & mask_enc) == 0) 845 continue; 846 847 if (algorithm_mac) 848 if ((algorithm_mac & mask_mac) == 0) 849 continue; 850 851 if (algorithm_ssl) 852 if ((algorithm_ssl & mask_ssl) == 0) 853 continue; 854 855 *ca_curr = (SSL_CIPHER *)(cipher_aliases + i); 856 ca_curr++; 857 } 858 859 *ca_curr = NULL; /* end of list */ 860 } 861 862 static void ssl_cipher_apply_rule(unsigned long cipher_id, 863 unsigned long alg_mkey, unsigned long alg_auth, 864 unsigned long alg_enc, unsigned long alg_mac, 865 unsigned long alg_ssl, 866 unsigned long algo_strength, 867 int rule, int strength_bits, 868 CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p) 869 { 870 CIPHER_ORDER *head, *tail, *curr, *curr2, *last; 871 const SSL_CIPHER *cp; 872 int reverse = 0; 873 874 #ifdef CIPHER_DEBUG 875 printf("Applying rule %d with %08lx/%08lx/%08lx/%08lx/%08lx %08lx (%d)\n", 876 rule, alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl, algo_strength, strength_bits); 877 #endif 878 879 if (rule == CIPHER_DEL) 880 reverse = 1; /* needed to maintain sorting between currently deleted ciphers */ 881 882 head = *head_p; 883 tail = *tail_p; 884 885 if (reverse) 886 { 887 curr = tail; 888 last = head; 889 } 890 else 891 { 892 curr = head; 893 last = tail; 894 } 895 896 curr2 = curr; 897 for (;;) 898 { 899 if ((curr == NULL) || (curr == last)) break; 900 curr = curr2; 901 curr2 = reverse ? curr->prev : curr->next; 902 903 cp = curr->cipher; 904 905 /* 906 * Selection criteria is either the value of strength_bits 907 * or the algorithms used. 908 */ 909 if (strength_bits >= 0) 910 { 911 if (strength_bits != cp->strength_bits) 912 continue; 913 } 914 else 915 { 916 #ifdef CIPHER_DEBUG 917 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); 918 #endif 919 920 if (alg_mkey && !(alg_mkey & cp->algorithm_mkey)) 921 continue; 922 if (alg_auth && !(alg_auth & cp->algorithm_auth)) 923 continue; 924 if (alg_enc && !(alg_enc & cp->algorithm_enc)) 925 continue; 926 if (alg_mac && !(alg_mac & cp->algorithm_mac)) 927 continue; 928 if (alg_ssl && !(alg_ssl & cp->algorithm_ssl)) 929 continue; 930 if ((algo_strength & SSL_EXP_MASK) && !(algo_strength & SSL_EXP_MASK & cp->algo_strength)) 931 continue; 932 if ((algo_strength & SSL_STRONG_MASK) && !(algo_strength & SSL_STRONG_MASK & cp->algo_strength)) 933 continue; 934 } 935 936 #ifdef CIPHER_DEBUG 937 printf("Action = %d\n", rule); 938 #endif 939 940 /* add the cipher if it has not been added yet. */ 941 if (rule == CIPHER_ADD) 942 { 943 /* reverse == 0 */ 944 if (!curr->active) 945 { 946 ll_append_tail(&head, curr, &tail); 947 curr->active = 1; 948 } 949 } 950 /* Move the added cipher to this location */ 951 else if (rule == CIPHER_ORD) 952 { 953 /* reverse == 0 */ 954 if (curr->active) 955 { 956 ll_append_tail(&head, curr, &tail); 957 } 958 } 959 else if (rule == CIPHER_DEL) 960 { 961 /* reverse == 1 */ 962 if (curr->active) 963 { 964 /* most recently deleted ciphersuites get best positions 965 * for any future CIPHER_ADD (note that the CIPHER_DEL loop 966 * works in reverse to maintain the order) */ 967 ll_append_head(&head, curr, &tail); 968 curr->active = 0; 969 } 970 } 971 else if (rule == CIPHER_KILL) 972 { 973 /* reverse == 0 */ 974 if (head == curr) 975 head = curr->next; 976 else 977 curr->prev->next = curr->next; 978 if (tail == curr) 979 tail = curr->prev; 980 curr->active = 0; 981 if (curr->next != NULL) 982 curr->next->prev = curr->prev; 983 if (curr->prev != NULL) 984 curr->prev->next = curr->next; 985 curr->next = NULL; 986 curr->prev = NULL; 987 } 988 } 989 990 *head_p = head; 991 *tail_p = tail; 992 } 993 994 static int ssl_cipher_strength_sort(CIPHER_ORDER **head_p, 995 CIPHER_ORDER **tail_p) 996 { 997 int max_strength_bits, i, *number_uses; 998 CIPHER_ORDER *curr; 999 1000 /* 1001 * This routine sorts the ciphers with descending strength. The sorting 1002 * must keep the pre-sorted sequence, so we apply the normal sorting 1003 * routine as '+' movement to the end of the list. 1004 */ 1005 max_strength_bits = 0; 1006 curr = *head_p; 1007 while (curr != NULL) 1008 { 1009 if (curr->active && 1010 (curr->cipher->strength_bits > max_strength_bits)) 1011 max_strength_bits = curr->cipher->strength_bits; 1012 curr = curr->next; 1013 } 1014 1015 number_uses = OPENSSL_malloc((max_strength_bits + 1) * sizeof(int)); 1016 if (!number_uses) 1017 { 1018 SSLerr(SSL_F_SSL_CIPHER_STRENGTH_SORT,ERR_R_MALLOC_FAILURE); 1019 return(0); 1020 } 1021 memset(number_uses, 0, (max_strength_bits + 1) * sizeof(int)); 1022 1023 /* 1024 * Now find the strength_bits values actually used 1025 */ 1026 curr = *head_p; 1027 while (curr != NULL) 1028 { 1029 if (curr->active) 1030 number_uses[curr->cipher->strength_bits]++; 1031 curr = curr->next; 1032 } 1033 /* 1034 * Go through the list of used strength_bits values in descending 1035 * order. 1036 */ 1037 for (i = max_strength_bits; i >= 0; i--) 1038 if (number_uses[i] > 0) 1039 ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_ORD, i, head_p, tail_p); 1040 1041 OPENSSL_free(number_uses); 1042 return(1); 1043 } 1044 1045 static int ssl_cipher_process_rulestr(const char *rule_str, 1046 CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p, 1047 const SSL_CIPHER **ca_list) 1048 { 1049 unsigned long alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl, algo_strength; 1050 const char *l, *buf; 1051 int j, multi, found, rule, retval, ok, buflen; 1052 unsigned long cipher_id = 0; 1053 char ch; 1054 1055 retval = 1; 1056 l = rule_str; 1057 for (;;) 1058 { 1059 ch = *l; 1060 1061 if (ch == '\0') 1062 break; /* done */ 1063 if (ch == '-') 1064 { rule = CIPHER_DEL; l++; } 1065 else if (ch == '+') 1066 { rule = CIPHER_ORD; l++; } 1067 else if (ch == '!') 1068 { rule = CIPHER_KILL; l++; } 1069 else if (ch == '@') 1070 { rule = CIPHER_SPECIAL; l++; } 1071 else 1072 { rule = CIPHER_ADD; } 1073 1074 if (ITEM_SEP(ch)) 1075 { 1076 l++; 1077 continue; 1078 } 1079 1080 alg_mkey = 0; 1081 alg_auth = 0; 1082 alg_enc = 0; 1083 alg_mac = 0; 1084 alg_ssl = 0; 1085 algo_strength = 0; 1086 1087 for (;;) 1088 { 1089 ch = *l; 1090 buf = l; 1091 buflen = 0; 1092 #ifndef CHARSET_EBCDIC 1093 while ( ((ch >= 'A') && (ch <= 'Z')) || 1094 ((ch >= '0') && (ch <= '9')) || 1095 ((ch >= 'a') && (ch <= 'z')) || 1096 (ch == '-')) 1097 #else 1098 while ( isalnum(ch) || (ch == '-')) 1099 #endif 1100 { 1101 ch = *(++l); 1102 buflen++; 1103 } 1104 1105 if (buflen == 0) 1106 { 1107 /* 1108 * We hit something we cannot deal with, 1109 * it is no command or separator nor 1110 * alphanumeric, so we call this an error. 1111 */ 1112 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR, 1113 SSL_R_INVALID_COMMAND); 1114 retval = found = 0; 1115 l++; 1116 break; 1117 } 1118 1119 if (rule == CIPHER_SPECIAL) 1120 { 1121 found = 0; /* unused -- avoid compiler warning */ 1122 break; /* special treatment */ 1123 } 1124 1125 /* check for multi-part specification */ 1126 if (ch == '+') 1127 { 1128 multi=1; 1129 l++; 1130 } 1131 else 1132 multi=0; 1133 1134 /* 1135 * Now search for the cipher alias in the ca_list. Be careful 1136 * with the strncmp, because the "buflen" limitation 1137 * will make the rule "ADH:SOME" and the cipher 1138 * "ADH-MY-CIPHER" look like a match for buflen=3. 1139 * So additionally check whether the cipher name found 1140 * has the correct length. We can save a strlen() call: 1141 * just checking for the '\0' at the right place is 1142 * sufficient, we have to strncmp() anyway. (We cannot 1143 * use strcmp(), because buf is not '\0' terminated.) 1144 */ 1145 j = found = 0; 1146 cipher_id = 0; 1147 while (ca_list[j]) 1148 { 1149 if (!strncmp(buf, ca_list[j]->name, buflen) && 1150 (ca_list[j]->name[buflen] == '\0')) 1151 { 1152 found = 1; 1153 break; 1154 } 1155 else 1156 j++; 1157 } 1158 1159 if (!found) 1160 break; /* ignore this entry */ 1161 1162 if (ca_list[j]->algorithm_mkey) 1163 { 1164 if (alg_mkey) 1165 { 1166 alg_mkey &= ca_list[j]->algorithm_mkey; 1167 if (!alg_mkey) { found = 0; break; } 1168 } 1169 else 1170 alg_mkey = ca_list[j]->algorithm_mkey; 1171 } 1172 1173 if (ca_list[j]->algorithm_auth) 1174 { 1175 if (alg_auth) 1176 { 1177 alg_auth &= ca_list[j]->algorithm_auth; 1178 if (!alg_auth) { found = 0; break; } 1179 } 1180 else 1181 alg_auth = ca_list[j]->algorithm_auth; 1182 } 1183 1184 if (ca_list[j]->algorithm_enc) 1185 { 1186 if (alg_enc) 1187 { 1188 alg_enc &= ca_list[j]->algorithm_enc; 1189 if (!alg_enc) { found = 0; break; } 1190 } 1191 else 1192 alg_enc = ca_list[j]->algorithm_enc; 1193 } 1194 1195 if (ca_list[j]->algorithm_mac) 1196 { 1197 if (alg_mac) 1198 { 1199 alg_mac &= ca_list[j]->algorithm_mac; 1200 if (!alg_mac) { found = 0; break; } 1201 } 1202 else 1203 alg_mac = ca_list[j]->algorithm_mac; 1204 } 1205 1206 if (ca_list[j]->algo_strength & SSL_EXP_MASK) 1207 { 1208 if (algo_strength & SSL_EXP_MASK) 1209 { 1210 algo_strength &= (ca_list[j]->algo_strength & SSL_EXP_MASK) | ~SSL_EXP_MASK; 1211 if (!(algo_strength & SSL_EXP_MASK)) { found = 0; break; } 1212 } 1213 else 1214 algo_strength |= ca_list[j]->algo_strength & SSL_EXP_MASK; 1215 } 1216 1217 if (ca_list[j]->algo_strength & SSL_STRONG_MASK) 1218 { 1219 if (algo_strength & SSL_STRONG_MASK) 1220 { 1221 algo_strength &= (ca_list[j]->algo_strength & SSL_STRONG_MASK) | ~SSL_STRONG_MASK; 1222 if (!(algo_strength & SSL_STRONG_MASK)) { found = 0; break; } 1223 } 1224 else 1225 algo_strength |= ca_list[j]->algo_strength & SSL_STRONG_MASK; 1226 } 1227 1228 if (ca_list[j]->valid) 1229 { 1230 /* explicit ciphersuite found; its protocol version 1231 * does not become part of the search pattern!*/ 1232 1233 cipher_id = ca_list[j]->id; 1234 } 1235 else 1236 { 1237 /* not an explicit ciphersuite; only in this case, the 1238 * protocol version is considered part of the search pattern */ 1239 1240 if (ca_list[j]->algorithm_ssl) 1241 { 1242 if (alg_ssl) 1243 { 1244 alg_ssl &= ca_list[j]->algorithm_ssl; 1245 if (!alg_ssl) { found = 0; break; } 1246 } 1247 else 1248 alg_ssl = ca_list[j]->algorithm_ssl; 1249 } 1250 } 1251 1252 if (!multi) break; 1253 } 1254 1255 /* 1256 * Ok, we have the rule, now apply it 1257 */ 1258 if (rule == CIPHER_SPECIAL) 1259 { /* special command */ 1260 ok = 0; 1261 if ((buflen == 8) && 1262 !strncmp(buf, "STRENGTH", 8)) 1263 ok = ssl_cipher_strength_sort(head_p, tail_p); 1264 else 1265 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR, 1266 SSL_R_INVALID_COMMAND); 1267 if (ok == 0) 1268 retval = 0; 1269 /* 1270 * We do not support any "multi" options 1271 * together with "@", so throw away the 1272 * rest of the command, if any left, until 1273 * end or ':' is found. 1274 */ 1275 while ((*l != '\0') && !ITEM_SEP(*l)) 1276 l++; 1277 } 1278 else if (found) 1279 { 1280 ssl_cipher_apply_rule(cipher_id, 1281 alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl, algo_strength, 1282 rule, -1, head_p, tail_p); 1283 } 1284 else 1285 { 1286 while ((*l != '\0') && !ITEM_SEP(*l)) 1287 l++; 1288 } 1289 if (*l == '\0') break; /* done */ 1290 } 1291 1292 return(retval); 1293 } 1294 1295 STACK_OF(SSL_CIPHER) *ssl_create_cipher_list(const SSL_METHOD *ssl_method, 1296 STACK_OF(SSL_CIPHER) **cipher_list, 1297 STACK_OF(SSL_CIPHER) **cipher_list_by_id, 1298 const char *rule_str) 1299 { 1300 int ok, num_of_ciphers, num_of_alias_max, num_of_group_aliases; 1301 unsigned long disabled_mkey, disabled_auth, disabled_enc, disabled_mac, disabled_ssl; 1302 STACK_OF(SSL_CIPHER) *cipherstack, *tmp_cipher_list; 1303 const char *rule_p; 1304 CIPHER_ORDER *co_list = NULL, *head = NULL, *tail = NULL, *curr; 1305 const SSL_CIPHER **ca_list = NULL; 1306 1307 /* 1308 * Return with error if nothing to do. 1309 */ 1310 if (rule_str == NULL || cipher_list == NULL || cipher_list_by_id == NULL) 1311 return NULL; 1312 1313 /* 1314 * To reduce the work to do we only want to process the compiled 1315 * in algorithms, so we first get the mask of disabled ciphers. 1316 */ 1317 ssl_cipher_get_disabled(&disabled_mkey, &disabled_auth, &disabled_enc, &disabled_mac, &disabled_ssl); 1318 1319 /* 1320 * Now we have to collect the available ciphers from the compiled 1321 * in ciphers. We cannot get more than the number compiled in, so 1322 * it is used for allocation. 1323 */ 1324 num_of_ciphers = ssl_method->num_ciphers(); 1325 #ifdef KSSL_DEBUG 1326 printf("ssl_create_cipher_list() for %d ciphers\n", num_of_ciphers); 1327 #endif /* KSSL_DEBUG */ 1328 co_list = (CIPHER_ORDER *)OPENSSL_malloc(sizeof(CIPHER_ORDER) * num_of_ciphers); 1329 if (co_list == NULL) 1330 { 1331 SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST,ERR_R_MALLOC_FAILURE); 1332 return(NULL); /* Failure */ 1333 } 1334 1335 ssl_cipher_collect_ciphers(ssl_method, num_of_ciphers, 1336 disabled_mkey, disabled_auth, disabled_enc, disabled_mac, disabled_ssl, 1337 co_list, &head, &tail); 1338 1339 1340 /* Now arrange all ciphers by preference: */ 1341 1342 /* Everything else being equal, prefer ephemeral ECDH over other key exchange mechanisms */ 1343 ssl_cipher_apply_rule(0, SSL_kEECDH, 0, 0, 0, 0, 0, CIPHER_ADD, -1, &head, &tail); 1344 ssl_cipher_apply_rule(0, SSL_kEECDH, 0, 0, 0, 0, 0, CIPHER_DEL, -1, &head, &tail); 1345 1346 /* AES is our preferred symmetric cipher */ 1347 ssl_cipher_apply_rule(0, 0, 0, SSL_AES, 0, 0, 0, CIPHER_ADD, -1, &head, &tail); 1348 1349 /* Temporarily enable everything else for sorting */ 1350 ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_ADD, -1, &head, &tail); 1351 1352 /* Low priority for MD5 */ 1353 ssl_cipher_apply_rule(0, 0, 0, 0, SSL_MD5, 0, 0, CIPHER_ORD, -1, &head, &tail); 1354 1355 /* Move anonymous ciphers to the end. Usually, these will remain disabled. 1356 * (For applications that allow them, they aren't too bad, but we prefer 1357 * authenticated ciphers.) */ 1358 ssl_cipher_apply_rule(0, 0, SSL_aNULL, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail); 1359 1360 /* Move ciphers without forward secrecy to the end */ 1361 ssl_cipher_apply_rule(0, 0, SSL_aECDH, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail); 1362 /* ssl_cipher_apply_rule(0, 0, SSL_aDH, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail); */ 1363 ssl_cipher_apply_rule(0, SSL_kRSA, 0, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail); 1364 ssl_cipher_apply_rule(0, SSL_kPSK, 0,0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail); 1365 ssl_cipher_apply_rule(0, SSL_kKRB5, 0,0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail); 1366 1367 /* RC4 is sort-of broken -- move the the end */ 1368 ssl_cipher_apply_rule(0, 0, 0, SSL_RC4, 0, 0, 0, CIPHER_ORD, -1, &head, &tail); 1369 1370 /* Now sort by symmetric encryption strength. The above ordering remains 1371 * in force within each class */ 1372 if (!ssl_cipher_strength_sort(&head, &tail)) 1373 { 1374 OPENSSL_free(co_list); 1375 return NULL; 1376 } 1377 1378 /* Now disable everything (maintaining the ordering!) */ 1379 ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_DEL, -1, &head, &tail); 1380 1381 1382 /* 1383 * We also need cipher aliases for selecting based on the rule_str. 1384 * There might be two types of entries in the rule_str: 1) names 1385 * of ciphers themselves 2) aliases for groups of ciphers. 1386 * For 1) we need the available ciphers and for 2) the cipher 1387 * groups of cipher_aliases added together in one list (otherwise 1388 * we would be happy with just the cipher_aliases table). 1389 */ 1390 num_of_group_aliases = sizeof(cipher_aliases) / sizeof(SSL_CIPHER); 1391 num_of_alias_max = num_of_ciphers + num_of_group_aliases + 1; 1392 ca_list = OPENSSL_malloc(sizeof(SSL_CIPHER *) * num_of_alias_max); 1393 if (ca_list == NULL) 1394 { 1395 OPENSSL_free(co_list); 1396 SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST,ERR_R_MALLOC_FAILURE); 1397 return(NULL); /* Failure */ 1398 } 1399 ssl_cipher_collect_aliases(ca_list, num_of_group_aliases, 1400 disabled_mkey, disabled_auth, disabled_enc, 1401 disabled_mac, disabled_ssl, head); 1402 1403 /* 1404 * If the rule_string begins with DEFAULT, apply the default rule 1405 * before using the (possibly available) additional rules. 1406 */ 1407 ok = 1; 1408 rule_p = rule_str; 1409 if (strncmp(rule_str,"DEFAULT",7) == 0) 1410 { 1411 ok = ssl_cipher_process_rulestr(SSL_DEFAULT_CIPHER_LIST, 1412 &head, &tail, ca_list); 1413 rule_p += 7; 1414 if (*rule_p == ':') 1415 rule_p++; 1416 } 1417 1418 if (ok && (strlen(rule_p) > 0)) 1419 ok = ssl_cipher_process_rulestr(rule_p, &head, &tail, ca_list); 1420 1421 OPENSSL_free((void *)ca_list); /* Not needed anymore */ 1422 1423 if (!ok) 1424 { /* Rule processing failure */ 1425 OPENSSL_free(co_list); 1426 return(NULL); 1427 } 1428 1429 /* 1430 * Allocate new "cipherstack" for the result, return with error 1431 * if we cannot get one. 1432 */ 1433 if ((cipherstack = sk_SSL_CIPHER_new_null()) == NULL) 1434 { 1435 OPENSSL_free(co_list); 1436 return(NULL); 1437 } 1438 1439 /* 1440 * The cipher selection for the list is done. The ciphers are added 1441 * to the resulting precedence to the STACK_OF(SSL_CIPHER). 1442 */ 1443 for (curr = head; curr != NULL; curr = curr->next) 1444 { 1445 #ifdef OPENSSL_FIPS 1446 if (curr->active && (!FIPS_mode() || curr->cipher->algo_strength & SSL_FIPS)) 1447 #else 1448 if (curr->active) 1449 #endif 1450 { 1451 sk_SSL_CIPHER_push(cipherstack, curr->cipher); 1452 #ifdef CIPHER_DEBUG 1453 printf("<%s>\n",curr->cipher->name); 1454 #endif 1455 } 1456 } 1457 OPENSSL_free(co_list); /* Not needed any longer */ 1458 1459 tmp_cipher_list = sk_SSL_CIPHER_dup(cipherstack); 1460 if (tmp_cipher_list == NULL) 1461 { 1462 sk_SSL_CIPHER_free(cipherstack); 1463 return NULL; 1464 } 1465 if (*cipher_list != NULL) 1466 sk_SSL_CIPHER_free(*cipher_list); 1467 *cipher_list = cipherstack; 1468 if (*cipher_list_by_id != NULL) 1469 sk_SSL_CIPHER_free(*cipher_list_by_id); 1470 *cipher_list_by_id = tmp_cipher_list; 1471 (void)sk_SSL_CIPHER_set_cmp_func(*cipher_list_by_id,ssl_cipher_ptr_id_cmp); 1472 1473 sk_SSL_CIPHER_sort(*cipher_list_by_id); 1474 return(cipherstack); 1475 } 1476 1477 char *SSL_CIPHER_description(const SSL_CIPHER *cipher, char *buf, int len) 1478 { 1479 int is_export,pkl,kl; 1480 const char *ver,*exp_str; 1481 const char *kx,*au,*enc,*mac; 1482 unsigned long alg_mkey,alg_auth,alg_enc,alg_mac,alg_ssl,alg2; 1483 #ifdef KSSL_DEBUG 1484 static const char *format="%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s%s AL=%lx/%lx/%lx/%lx/%lx\n"; 1485 #else 1486 static const char *format="%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s%s\n"; 1487 #endif /* KSSL_DEBUG */ 1488 1489 alg_mkey = cipher->algorithm_mkey; 1490 alg_auth = cipher->algorithm_auth; 1491 alg_enc = cipher->algorithm_enc; 1492 alg_mac = cipher->algorithm_mac; 1493 alg_ssl = cipher->algorithm_ssl; 1494 1495 alg2=cipher->algorithm2; 1496 1497 is_export=SSL_C_IS_EXPORT(cipher); 1498 pkl=SSL_C_EXPORT_PKEYLENGTH(cipher); 1499 kl=SSL_C_EXPORT_KEYLENGTH(cipher); 1500 exp_str=is_export?" export":""; 1501 1502 if (alg_ssl & SSL_SSLV2) 1503 ver="SSLv2"; 1504 else if (alg_ssl & SSL_SSLV3) 1505 ver="SSLv3"; 1506 else 1507 ver="unknown"; 1508 1509 switch (alg_mkey) 1510 { 1511 case SSL_kRSA: 1512 kx=is_export?(pkl == 512 ? "RSA(512)" : "RSA(1024)"):"RSA"; 1513 break; 1514 case SSL_kDHr: 1515 kx="DH/RSA"; 1516 break; 1517 case SSL_kDHd: 1518 kx="DH/DSS"; 1519 break; 1520 case SSL_kKRB5: 1521 kx="KRB5"; 1522 break; 1523 case SSL_kEDH: 1524 kx=is_export?(pkl == 512 ? "DH(512)" : "DH(1024)"):"DH"; 1525 break; 1526 case SSL_kECDHr: 1527 kx="ECDH/RSA"; 1528 break; 1529 case SSL_kECDHe: 1530 kx="ECDH/ECDSA"; 1531 break; 1532 case SSL_kEECDH: 1533 kx="ECDH"; 1534 break; 1535 case SSL_kPSK: 1536 kx="PSK"; 1537 break; 1538 case SSL_kSRP: 1539 kx="SRP"; 1540 break; 1541 default: 1542 kx="unknown"; 1543 } 1544 1545 switch (alg_auth) 1546 { 1547 case SSL_aRSA: 1548 au="RSA"; 1549 break; 1550 case SSL_aDSS: 1551 au="DSS"; 1552 break; 1553 case SSL_aDH: 1554 au="DH"; 1555 break; 1556 case SSL_aKRB5: 1557 au="KRB5"; 1558 break; 1559 case SSL_aECDH: 1560 au="ECDH"; 1561 break; 1562 case SSL_aNULL: 1563 au="None"; 1564 break; 1565 case SSL_aECDSA: 1566 au="ECDSA"; 1567 break; 1568 case SSL_aPSK: 1569 au="PSK"; 1570 break; 1571 default: 1572 au="unknown"; 1573 break; 1574 } 1575 1576 switch (alg_enc) 1577 { 1578 case SSL_DES: 1579 enc=(is_export && kl == 5)?"DES(40)":"DES(56)"; 1580 break; 1581 case SSL_3DES: 1582 enc="3DES(168)"; 1583 break; 1584 case SSL_RC4: 1585 enc=is_export?(kl == 5 ? "RC4(40)" : "RC4(56)") 1586 :((alg2&SSL2_CF_8_BYTE_ENC)?"RC4(64)":"RC4(128)"); 1587 break; 1588 case SSL_RC2: 1589 enc=is_export?(kl == 5 ? "RC2(40)" : "RC2(56)"):"RC2(128)"; 1590 break; 1591 case SSL_IDEA: 1592 enc="IDEA(128)"; 1593 break; 1594 case SSL_eNULL: 1595 enc="None"; 1596 break; 1597 case SSL_AES128: 1598 enc="AES(128)"; 1599 break; 1600 case SSL_AES256: 1601 enc="AES(256)"; 1602 break; 1603 case SSL_CAMELLIA128: 1604 enc="Camellia(128)"; 1605 break; 1606 case SSL_CAMELLIA256: 1607 enc="Camellia(256)"; 1608 break; 1609 case SSL_SEED: 1610 enc="SEED(128)"; 1611 break; 1612 default: 1613 enc="unknown"; 1614 break; 1615 } 1616 1617 switch (alg_mac) 1618 { 1619 case SSL_MD5: 1620 mac="MD5"; 1621 break; 1622 case SSL_SHA1: 1623 mac="SHA1"; 1624 break; 1625 case SSL_SHA256: 1626 mac="SHA256"; 1627 break; 1628 default: 1629 mac="unknown"; 1630 break; 1631 } 1632 1633 if (buf == NULL) 1634 { 1635 len=128; 1636 buf=OPENSSL_malloc(len); 1637 if (buf == NULL) return("OPENSSL_malloc Error"); 1638 } 1639 else if (len < 128) 1640 return("Buffer too small"); 1641 1642 #ifdef KSSL_DEBUG 1643 BIO_snprintf(buf,len,format,cipher->name,ver,kx,au,enc,mac,exp_str,alg_mkey,alg_auth,alg_enc,alg_mac,alg_ssl); 1644 #else 1645 BIO_snprintf(buf,len,format,cipher->name,ver,kx,au,enc,mac,exp_str); 1646 #endif /* KSSL_DEBUG */ 1647 return(buf); 1648 } 1649 1650 char *SSL_CIPHER_get_version(const SSL_CIPHER *c) 1651 { 1652 int i; 1653 1654 if (c == NULL) return("(NONE)"); 1655 i=(int)(c->id>>24L); 1656 if (i == 3) 1657 return("TLSv1/SSLv3"); 1658 else if (i == 2) 1659 return("SSLv2"); 1660 else 1661 return("unknown"); 1662 } 1663 1664 /* return the actual cipher being used */ 1665 const char *SSL_CIPHER_get_name(const SSL_CIPHER *c) 1666 { 1667 if (c != NULL) 1668 return(c->name); 1669 return("(NONE)"); 1670 } 1671 1672 /* number of bits for symmetric cipher */ 1673 int SSL_CIPHER_get_bits(const SSL_CIPHER *c, int *alg_bits) 1674 { 1675 int ret=0; 1676 1677 if (c != NULL) 1678 { 1679 if (alg_bits != NULL) *alg_bits = c->alg_bits; 1680 ret = c->strength_bits; 1681 } 1682 return(ret); 1683 } 1684 1685 unsigned long SSL_CIPHER_get_id(const SSL_CIPHER *c) 1686 { 1687 return c->id; 1688 } 1689 1690 SSL_COMP *ssl3_comp_find(STACK_OF(SSL_COMP) *sk, int n) 1691 { 1692 SSL_COMP *ctmp; 1693 int i,nn; 1694 1695 if ((n == 0) || (sk == NULL)) return(NULL); 1696 nn=sk_SSL_COMP_num(sk); 1697 for (i=0; i<nn; i++) 1698 { 1699 ctmp=sk_SSL_COMP_value(sk,i); 1700 if (ctmp->id == n) 1701 return(ctmp); 1702 } 1703 return(NULL); 1704 } 1705 1706 #ifdef OPENSSL_NO_COMP 1707 void *SSL_COMP_get_compression_methods(void) 1708 { 1709 return NULL; 1710 } 1711 int SSL_COMP_add_compression_method(int id, void *cm) 1712 { 1713 return 1; 1714 } 1715 1716 const char *SSL_COMP_get_name(const void *comp) 1717 { 1718 return NULL; 1719 } 1720 #else 1721 STACK_OF(SSL_COMP) *SSL_COMP_get_compression_methods(void) 1722 { 1723 load_builtin_compressions(); 1724 return(ssl_comp_methods); 1725 } 1726 1727 int SSL_COMP_add_compression_method(int id, COMP_METHOD *cm) 1728 { 1729 SSL_COMP *comp; 1730 1731 if (cm == NULL || cm->type == NID_undef) 1732 return 1; 1733 1734 /* According to draft-ietf-tls-compression-04.txt, the 1735 compression number ranges should be the following: 1736 1737 0 to 63: methods defined by the IETF 1738 64 to 192: external party methods assigned by IANA 1739 193 to 255: reserved for private use */ 1740 if (id < 193 || id > 255) 1741 { 1742 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,SSL_R_COMPRESSION_ID_NOT_WITHIN_PRIVATE_RANGE); 1743 return 0; 1744 } 1745 1746 MemCheck_off(); 1747 comp=(SSL_COMP *)OPENSSL_malloc(sizeof(SSL_COMP)); 1748 comp->id=id; 1749 comp->method=cm; 1750 load_builtin_compressions(); 1751 if (ssl_comp_methods 1752 && sk_SSL_COMP_find(ssl_comp_methods,comp) >= 0) 1753 { 1754 OPENSSL_free(comp); 1755 MemCheck_on(); 1756 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,SSL_R_DUPLICATE_COMPRESSION_ID); 1757 return(1); 1758 } 1759 else if ((ssl_comp_methods == NULL) 1760 || !sk_SSL_COMP_push(ssl_comp_methods,comp)) 1761 { 1762 OPENSSL_free(comp); 1763 MemCheck_on(); 1764 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,ERR_R_MALLOC_FAILURE); 1765 return(1); 1766 } 1767 else 1768 { 1769 MemCheck_on(); 1770 return(0); 1771 } 1772 } 1773 1774 const char *SSL_COMP_get_name(const COMP_METHOD *comp) 1775 { 1776 if (comp) 1777 return comp->name; 1778 return NULL; 1779 } 1780 1781 #endif 1782