1 /* ssl/ssl_ciph.c */ 2 /* Copyright (C) 1995-1998 Eric Young (eay (at) cryptsoft.com) 3 * All rights reserved. 4 * 5 * This package is an SSL implementation written 6 * by Eric Young (eay (at) 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 (at) 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 (at) 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 (at) 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 (at) 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 (at) cryptsoft.com). This product includes software written by Tim 108 * Hudson (tjh (at) 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 /*Constant SSL_MAX_DIGEST equal to size of digests array should be 183 * defined in the 184 * ssl_locl.h */ 185 #define SSL_MD_NUM_IDX SSL_MAX_DIGEST 186 static const EVP_MD *ssl_digest_methods[SSL_MD_NUM_IDX]={ 187 NULL,NULL,NULL,NULL 188 }; 189 /* PKEY_TYPE for GOST89MAC is known in advance, but, because 190 * implementation is engine-provided, we'll fill it only if 191 * corresponding EVP_PKEY_METHOD is found 192 */ 193 static int ssl_mac_pkey_id[SSL_MD_NUM_IDX]={ 194 EVP_PKEY_HMAC,EVP_PKEY_HMAC,EVP_PKEY_HMAC,NID_undef 195 }; 196 197 static int ssl_mac_secret_size[SSL_MD_NUM_IDX]={ 198 0,0,0,0 199 }; 200 201 static int ssl_handshake_digest_flag[SSL_MD_NUM_IDX]={ 202 SSL_HANDSHAKE_MAC_MD5,SSL_HANDSHAKE_MAC_SHA, 203 SSL_HANDSHAKE_MAC_GOST94,0 204 }; 205 206 #define CIPHER_ADD 1 207 #define CIPHER_KILL 2 208 #define CIPHER_DEL 3 209 #define CIPHER_ORD 4 210 #define CIPHER_SPECIAL 5 211 212 typedef struct cipher_order_st 213 { 214 const SSL_CIPHER *cipher; 215 int active; 216 int dead; 217 struct cipher_order_st *next,*prev; 218 } CIPHER_ORDER; 219 220 static const SSL_CIPHER cipher_aliases[]={ 221 /* "ALL" doesn't include eNULL (must be specifically enabled) */ 222 {0,SSL_TXT_ALL,0, 0,0,~SSL_eNULL,0,0,0,0,0,0}, 223 /* "COMPLEMENTOFALL" */ 224 {0,SSL_TXT_CMPALL,0, 0,0,SSL_eNULL,0,0,0,0,0,0}, 225 226 /* "COMPLEMENTOFDEFAULT" (does *not* include ciphersuites not found in ALL!) */ 227 {0,SSL_TXT_CMPDEF,0, SSL_kEDH|SSL_kEECDH,SSL_aNULL,~SSL_eNULL,0,0,0,0,0,0}, 228 229 /* key exchange aliases 230 * (some of those using only a single bit here combine 231 * multiple key exchange algs according to the RFCs, 232 * e.g. kEDH combines DHE_DSS and DHE_RSA) */ 233 {0,SSL_TXT_kRSA,0, SSL_kRSA, 0,0,0,0,0,0,0,0}, 234 235 {0,SSL_TXT_kDHr,0, SSL_kDHr, 0,0,0,0,0,0,0,0}, /* no such ciphersuites supported! */ 236 {0,SSL_TXT_kDHd,0, SSL_kDHd, 0,0,0,0,0,0,0,0}, /* no such ciphersuites supported! */ 237 {0,SSL_TXT_kDH,0, SSL_kDHr|SSL_kDHd,0,0,0,0,0,0,0,0}, /* no such ciphersuites supported! */ 238 {0,SSL_TXT_kEDH,0, SSL_kEDH, 0,0,0,0,0,0,0,0}, 239 {0,SSL_TXT_DH,0, SSL_kDHr|SSL_kDHd|SSL_kEDH,0,0,0,0,0,0,0,0}, 240 241 {0,SSL_TXT_kKRB5,0, SSL_kKRB5, 0,0,0,0,0,0,0,0}, 242 243 {0,SSL_TXT_kECDHr,0, SSL_kECDHr,0,0,0,0,0,0,0,0}, 244 {0,SSL_TXT_kECDHe,0, SSL_kECDHe,0,0,0,0,0,0,0,0}, 245 {0,SSL_TXT_kECDH,0, SSL_kECDHr|SSL_kECDHe,0,0,0,0,0,0,0,0}, 246 {0,SSL_TXT_kEECDH,0, SSL_kEECDH,0,0,0,0,0,0,0,0}, 247 {0,SSL_TXT_ECDH,0, SSL_kECDHr|SSL_kECDHe|SSL_kEECDH,0,0,0,0,0,0,0,0}, 248 249 {0,SSL_TXT_kPSK,0, SSL_kPSK, 0,0,0,0,0,0,0,0}, 250 {0,SSL_TXT_kGOST,0, SSL_kGOST,0,0,0,0,0,0,0,0}, 251 252 /* server authentication aliases */ 253 {0,SSL_TXT_aRSA,0, 0,SSL_aRSA, 0,0,0,0,0,0,0}, 254 {0,SSL_TXT_aDSS,0, 0,SSL_aDSS, 0,0,0,0,0,0,0}, 255 {0,SSL_TXT_DSS,0, 0,SSL_aDSS, 0,0,0,0,0,0,0}, 256 {0,SSL_TXT_aKRB5,0, 0,SSL_aKRB5, 0,0,0,0,0,0,0}, 257 {0,SSL_TXT_aNULL,0, 0,SSL_aNULL, 0,0,0,0,0,0,0}, 258 {0,SSL_TXT_aDH,0, 0,SSL_aDH, 0,0,0,0,0,0,0}, /* no such ciphersuites supported! */ 259 {0,SSL_TXT_aECDH,0, 0,SSL_aECDH, 0,0,0,0,0,0,0}, 260 {0,SSL_TXT_aECDSA,0, 0,SSL_aECDSA,0,0,0,0,0,0,0}, 261 {0,SSL_TXT_ECDSA,0, 0,SSL_aECDSA, 0,0,0,0,0,0,0}, 262 {0,SSL_TXT_aPSK,0, 0,SSL_aPSK, 0,0,0,0,0,0,0}, 263 {0,SSL_TXT_aGOST94,0,0,SSL_aGOST94,0,0,0,0,0,0,0}, 264 {0,SSL_TXT_aGOST01,0,0,SSL_aGOST01,0,0,0,0,0,0,0}, 265 {0,SSL_TXT_aGOST,0,0,SSL_aGOST94|SSL_aGOST01,0,0,0,0,0,0,0}, 266 267 /* aliases combining key exchange and server authentication */ 268 {0,SSL_TXT_EDH,0, SSL_kEDH,~SSL_aNULL,0,0,0,0,0,0,0}, 269 {0,SSL_TXT_EECDH,0, SSL_kEECDH,~SSL_aNULL,0,0,0,0,0,0,0}, 270 {0,SSL_TXT_NULL,0, 0,0,SSL_eNULL, 0,0,0,0,0,0}, 271 {0,SSL_TXT_KRB5,0, SSL_kKRB5,SSL_aKRB5,0,0,0,0,0,0,0}, 272 {0,SSL_TXT_RSA,0, SSL_kRSA,SSL_aRSA,0,0,0,0,0,0,0}, 273 {0,SSL_TXT_ADH,0, SSL_kEDH,SSL_aNULL,0,0,0,0,0,0,0}, 274 {0,SSL_TXT_AECDH,0, SSL_kEECDH,SSL_aNULL,0,0,0,0,0,0,0}, 275 {0,SSL_TXT_PSK,0, SSL_kPSK,SSL_aPSK,0,0,0,0,0,0,0}, 276 277 278 /* symmetric encryption aliases */ 279 {0,SSL_TXT_DES,0, 0,0,SSL_DES, 0,0,0,0,0,0}, 280 {0,SSL_TXT_3DES,0, 0,0,SSL_3DES, 0,0,0,0,0,0}, 281 {0,SSL_TXT_RC4,0, 0,0,SSL_RC4, 0,0,0,0,0,0}, 282 {0,SSL_TXT_RC2,0, 0,0,SSL_RC2, 0,0,0,0,0,0}, 283 {0,SSL_TXT_IDEA,0, 0,0,SSL_IDEA, 0,0,0,0,0,0}, 284 {0,SSL_TXT_SEED,0, 0,0,SSL_SEED, 0,0,0,0,0,0}, 285 {0,SSL_TXT_eNULL,0, 0,0,SSL_eNULL, 0,0,0,0,0,0}, 286 {0,SSL_TXT_AES128,0, 0,0,SSL_AES128,0,0,0,0,0,0}, 287 {0,SSL_TXT_AES256,0, 0,0,SSL_AES256,0,0,0,0,0,0}, 288 {0,SSL_TXT_AES,0, 0,0,SSL_AES128|SSL_AES256,0,0,0,0,0,0}, 289 {0,SSL_TXT_CAMELLIA128,0,0,0,SSL_CAMELLIA128,0,0,0,0,0,0}, 290 {0,SSL_TXT_CAMELLIA256,0,0,0,SSL_CAMELLIA256,0,0,0,0,0,0}, 291 {0,SSL_TXT_CAMELLIA ,0,0,0,SSL_CAMELLIA128|SSL_CAMELLIA256,0,0,0,0,0,0}, 292 293 /* MAC aliases */ 294 {0,SSL_TXT_MD5,0, 0,0,0,SSL_MD5, 0,0,0,0,0}, 295 {0,SSL_TXT_SHA1,0, 0,0,0,SSL_SHA1, 0,0,0,0,0}, 296 {0,SSL_TXT_SHA,0, 0,0,0,SSL_SHA1, 0,0,0,0,0}, 297 {0,SSL_TXT_GOST94,0, 0,0,0,SSL_GOST94, 0,0,0,0,0}, 298 {0,SSL_TXT_GOST89MAC,0, 0,0,0,SSL_GOST89MAC, 0,0,0,0,0}, 299 300 /* protocol version aliases */ 301 {0,SSL_TXT_SSLV2,0, 0,0,0,0,SSL_SSLV2, 0,0,0,0}, 302 {0,SSL_TXT_SSLV3,0, 0,0,0,0,SSL_SSLV3, 0,0,0,0}, 303 {0,SSL_TXT_TLSV1,0, 0,0,0,0,SSL_TLSV1, 0,0,0,0}, 304 305 /* export flag */ 306 {0,SSL_TXT_EXP,0, 0,0,0,0,0,SSL_EXPORT,0,0,0}, 307 {0,SSL_TXT_EXPORT,0, 0,0,0,0,0,SSL_EXPORT,0,0,0}, 308 309 /* strength classes */ 310 {0,SSL_TXT_EXP40,0, 0,0,0,0,0,SSL_EXP40, 0,0,0}, 311 {0,SSL_TXT_EXP56,0, 0,0,0,0,0,SSL_EXP56, 0,0,0}, 312 {0,SSL_TXT_LOW,0, 0,0,0,0,0,SSL_LOW, 0,0,0}, 313 {0,SSL_TXT_MEDIUM,0, 0,0,0,0,0,SSL_MEDIUM,0,0,0}, 314 {0,SSL_TXT_HIGH,0, 0,0,0,0,0,SSL_HIGH, 0,0,0}, 315 /* FIPS 140-2 approved ciphersuite */ 316 {0,SSL_TXT_FIPS,0, 0,0,~SSL_eNULL,0,0,SSL_FIPS, 0,0,0}, 317 }; 318 /* Search for public key algorithm with given name and 319 * return its pkey_id if it is available. Otherwise return 0 320 */ 321 #ifdef OPENSSL_NO_ENGINE 322 323 static int get_optional_pkey_id(const char *pkey_name) 324 { 325 const EVP_PKEY_ASN1_METHOD *ameth; 326 int pkey_id=0; 327 ameth = EVP_PKEY_asn1_find_str(NULL,pkey_name,-1); 328 if (ameth) 329 { 330 EVP_PKEY_asn1_get0_info(&pkey_id, NULL,NULL,NULL,NULL,ameth); 331 } 332 return pkey_id; 333 } 334 335 #else 336 337 static int get_optional_pkey_id(const char *pkey_name) 338 { 339 const EVP_PKEY_ASN1_METHOD *ameth; 340 ENGINE *tmpeng = NULL; 341 int pkey_id=0; 342 ameth = EVP_PKEY_asn1_find_str(&tmpeng,pkey_name,-1); 343 if (ameth) 344 { 345 EVP_PKEY_asn1_get0_info(&pkey_id, NULL,NULL,NULL,NULL,ameth); 346 } 347 if (tmpeng) ENGINE_finish(tmpeng); 348 return pkey_id; 349 } 350 351 #endif 352 353 void ssl_load_ciphers(void) 354 { 355 ssl_cipher_methods[SSL_ENC_DES_IDX]= 356 EVP_get_cipherbyname(SN_des_cbc); 357 ssl_cipher_methods[SSL_ENC_3DES_IDX]= 358 EVP_get_cipherbyname(SN_des_ede3_cbc); 359 ssl_cipher_methods[SSL_ENC_RC4_IDX]= 360 EVP_get_cipherbyname(SN_rc4); 361 ssl_cipher_methods[SSL_ENC_RC2_IDX]= 362 EVP_get_cipherbyname(SN_rc2_cbc); 363 #ifndef OPENSSL_NO_IDEA 364 ssl_cipher_methods[SSL_ENC_IDEA_IDX]= 365 EVP_get_cipherbyname(SN_idea_cbc); 366 #else 367 ssl_cipher_methods[SSL_ENC_IDEA_IDX]= NULL; 368 #endif 369 ssl_cipher_methods[SSL_ENC_AES128_IDX]= 370 EVP_get_cipherbyname(SN_aes_128_cbc); 371 ssl_cipher_methods[SSL_ENC_AES256_IDX]= 372 EVP_get_cipherbyname(SN_aes_256_cbc); 373 ssl_cipher_methods[SSL_ENC_CAMELLIA128_IDX]= 374 EVP_get_cipherbyname(SN_camellia_128_cbc); 375 ssl_cipher_methods[SSL_ENC_CAMELLIA256_IDX]= 376 EVP_get_cipherbyname(SN_camellia_256_cbc); 377 ssl_cipher_methods[SSL_ENC_GOST89_IDX]= 378 EVP_get_cipherbyname(SN_gost89_cnt); 379 ssl_cipher_methods[SSL_ENC_SEED_IDX]= 380 EVP_get_cipherbyname(SN_seed_cbc); 381 382 ssl_digest_methods[SSL_MD_MD5_IDX]= 383 EVP_get_digestbyname(SN_md5); 384 ssl_mac_secret_size[SSL_MD_MD5_IDX]= 385 EVP_MD_size(ssl_digest_methods[SSL_MD_MD5_IDX]); 386 OPENSSL_assert(ssl_mac_secret_size[SSL_MD_MD5_IDX] >= 0); 387 ssl_digest_methods[SSL_MD_SHA1_IDX]= 388 EVP_get_digestbyname(SN_sha1); 389 ssl_mac_secret_size[SSL_MD_SHA1_IDX]= 390 EVP_MD_size(ssl_digest_methods[SSL_MD_SHA1_IDX]); 391 OPENSSL_assert(ssl_mac_secret_size[SSL_MD_SHA1_IDX] >= 0); 392 ssl_digest_methods[SSL_MD_GOST94_IDX]= 393 EVP_get_digestbyname(SN_id_GostR3411_94); 394 if (ssl_digest_methods[SSL_MD_GOST94_IDX]) 395 { 396 ssl_mac_secret_size[SSL_MD_GOST94_IDX]= 397 EVP_MD_size(ssl_digest_methods[SSL_MD_GOST94_IDX]); 398 OPENSSL_assert(ssl_mac_secret_size[SSL_MD_GOST94_IDX] >= 0); 399 } 400 ssl_digest_methods[SSL_MD_GOST89MAC_IDX]= 401 EVP_get_digestbyname(SN_id_Gost28147_89_MAC); 402 ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX] = get_optional_pkey_id("gost-mac"); 403 if (ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX]) { 404 ssl_mac_secret_size[SSL_MD_GOST89MAC_IDX]=32; 405 } 406 407 } 408 #ifndef OPENSSL_NO_COMP 409 410 static int sk_comp_cmp(const SSL_COMP * const *a, 411 const SSL_COMP * const *b) 412 { 413 return((*a)->id-(*b)->id); 414 } 415 416 static void load_builtin_compressions(void) 417 { 418 int got_write_lock = 0; 419 420 CRYPTO_r_lock(CRYPTO_LOCK_SSL); 421 if (ssl_comp_methods == NULL) 422 { 423 CRYPTO_r_unlock(CRYPTO_LOCK_SSL); 424 CRYPTO_w_lock(CRYPTO_LOCK_SSL); 425 got_write_lock = 1; 426 427 if (ssl_comp_methods == NULL) 428 { 429 SSL_COMP *comp = NULL; 430 431 MemCheck_off(); 432 ssl_comp_methods=sk_SSL_COMP_new(sk_comp_cmp); 433 if (ssl_comp_methods != NULL) 434 { 435 comp=(SSL_COMP *)OPENSSL_malloc(sizeof(SSL_COMP)); 436 if (comp != NULL) 437 { 438 comp->method=COMP_zlib(); 439 if (comp->method 440 && comp->method->type == NID_undef) 441 OPENSSL_free(comp); 442 else 443 { 444 comp->id=SSL_COMP_ZLIB_IDX; 445 comp->name=comp->method->name; 446 sk_SSL_COMP_push(ssl_comp_methods,comp); 447 } 448 } 449 } 450 MemCheck_on(); 451 } 452 } 453 454 if (got_write_lock) 455 CRYPTO_w_unlock(CRYPTO_LOCK_SSL); 456 else 457 CRYPTO_r_unlock(CRYPTO_LOCK_SSL); 458 } 459 #endif 460 461 int ssl_cipher_get_evp(const SSL_SESSION *s, const EVP_CIPHER **enc, 462 const EVP_MD **md, int *mac_pkey_type, int *mac_secret_size,SSL_COMP **comp) 463 { 464 int i; 465 const SSL_CIPHER *c; 466 467 c=s->cipher; 468 if (c == NULL) return(0); 469 if (comp != NULL) 470 { 471 SSL_COMP ctmp; 472 #ifndef OPENSSL_NO_COMP 473 load_builtin_compressions(); 474 #endif 475 476 *comp=NULL; 477 ctmp.id=s->compress_meth; 478 if (ssl_comp_methods != NULL) 479 { 480 i=sk_SSL_COMP_find(ssl_comp_methods,&ctmp); 481 if (i >= 0) 482 *comp=sk_SSL_COMP_value(ssl_comp_methods,i); 483 else 484 *comp=NULL; 485 } 486 } 487 488 if ((enc == NULL) || (md == NULL)) return(0); 489 490 switch (c->algorithm_enc) 491 { 492 case SSL_DES: 493 i=SSL_ENC_DES_IDX; 494 break; 495 case SSL_3DES: 496 i=SSL_ENC_3DES_IDX; 497 break; 498 case SSL_RC4: 499 i=SSL_ENC_RC4_IDX; 500 break; 501 case SSL_RC2: 502 i=SSL_ENC_RC2_IDX; 503 break; 504 case SSL_IDEA: 505 i=SSL_ENC_IDEA_IDX; 506 break; 507 case SSL_eNULL: 508 i=SSL_ENC_NULL_IDX; 509 break; 510 case SSL_AES128: 511 i=SSL_ENC_AES128_IDX; 512 break; 513 case SSL_AES256: 514 i=SSL_ENC_AES256_IDX; 515 break; 516 case SSL_CAMELLIA128: 517 i=SSL_ENC_CAMELLIA128_IDX; 518 break; 519 case SSL_CAMELLIA256: 520 i=SSL_ENC_CAMELLIA256_IDX; 521 break; 522 case SSL_eGOST2814789CNT: 523 i=SSL_ENC_GOST89_IDX; 524 break; 525 case SSL_SEED: 526 i=SSL_ENC_SEED_IDX; 527 break; 528 default: 529 i= -1; 530 break; 531 } 532 533 if ((i < 0) || (i > SSL_ENC_NUM_IDX)) 534 *enc=NULL; 535 else 536 { 537 if (i == SSL_ENC_NULL_IDX) 538 *enc=EVP_enc_null(); 539 else 540 *enc=ssl_cipher_methods[i]; 541 } 542 543 switch (c->algorithm_mac) 544 { 545 case SSL_MD5: 546 i=SSL_MD_MD5_IDX; 547 break; 548 case SSL_SHA1: 549 i=SSL_MD_SHA1_IDX; 550 break; 551 case SSL_GOST94: 552 i = SSL_MD_GOST94_IDX; 553 break; 554 case SSL_GOST89MAC: 555 i = SSL_MD_GOST89MAC_IDX; 556 break; 557 default: 558 i= -1; 559 break; 560 } 561 if ((i < 0) || (i > SSL_MD_NUM_IDX)) 562 { 563 *md=NULL; 564 if (mac_pkey_type!=NULL) *mac_pkey_type = NID_undef; 565 if (mac_secret_size!=NULL) *mac_secret_size = 0; 566 567 } 568 else 569 { 570 *md=ssl_digest_methods[i]; 571 if (mac_pkey_type!=NULL) *mac_pkey_type = ssl_mac_pkey_id[i]; 572 if (mac_secret_size!=NULL) *mac_secret_size = ssl_mac_secret_size[i]; 573 } 574 575 if ((*enc != NULL) && (*md != NULL) && (!mac_pkey_type||*mac_pkey_type != NID_undef)) 576 return(1); 577 else 578 return(0); 579 } 580 581 int ssl_get_handshake_digest(int idx, long *mask, const EVP_MD **md) 582 { 583 if (idx <0||idx>=SSL_MD_NUM_IDX) 584 { 585 return 0; 586 } 587 if (ssl_handshake_digest_flag[idx]==0) return 0; 588 *mask = ssl_handshake_digest_flag[idx]; 589 *md = ssl_digest_methods[idx]; 590 return 1; 591 } 592 593 #define ITEM_SEP(a) \ 594 (((a) == ':') || ((a) == ' ') || ((a) == ';') || ((a) == ',')) 595 596 static void ll_append_tail(CIPHER_ORDER **head, CIPHER_ORDER *curr, 597 CIPHER_ORDER **tail) 598 { 599 if (curr == *tail) return; 600 if (curr == *head) 601 *head=curr->next; 602 if (curr->prev != NULL) 603 curr->prev->next=curr->next; 604 if (curr->next != NULL) 605 curr->next->prev=curr->prev; 606 (*tail)->next=curr; 607 curr->prev= *tail; 608 curr->next=NULL; 609 *tail=curr; 610 } 611 612 static void ll_append_head(CIPHER_ORDER **head, CIPHER_ORDER *curr, 613 CIPHER_ORDER **tail) 614 { 615 if (curr == *head) return; 616 if (curr == *tail) 617 *tail=curr->prev; 618 if (curr->next != NULL) 619 curr->next->prev=curr->prev; 620 if (curr->prev != NULL) 621 curr->prev->next=curr->next; 622 (*head)->prev=curr; 623 curr->next= *head; 624 curr->prev=NULL; 625 *head=curr; 626 } 627 628 static void ssl_cipher_get_disabled(unsigned long *mkey, unsigned long *auth, unsigned long *enc, unsigned long *mac, unsigned long *ssl) 629 { 630 *mkey = 0; 631 *auth = 0; 632 *enc = 0; 633 *mac = 0; 634 *ssl = 0; 635 636 #ifdef OPENSSL_NO_RSA 637 *mkey |= SSL_kRSA; 638 *auth |= SSL_aRSA; 639 #endif 640 #ifdef OPENSSL_NO_DSA 641 *auth |= SSL_aDSS; 642 #endif 643 *mkey |= SSL_kDHr|SSL_kDHd; /* no such ciphersuites supported! */ 644 *auth |= SSL_aDH; 645 #ifdef OPENSSL_NO_DH 646 *mkey |= SSL_kDHr|SSL_kDHd|SSL_kEDH; 647 *auth |= SSL_aDH; 648 #endif 649 #ifdef OPENSSL_NO_KRB5 650 *mkey |= SSL_kKRB5; 651 *auth |= SSL_aKRB5; 652 #endif 653 #ifdef OPENSSL_NO_ECDSA 654 *auth |= SSL_aECDSA; 655 #endif 656 #ifdef OPENSSL_NO_ECDH 657 *mkey |= SSL_kECDHe|SSL_kECDHr; 658 *auth |= SSL_aECDH; 659 #endif 660 #ifdef OPENSSL_NO_PSK 661 *mkey |= SSL_kPSK; 662 *auth |= SSL_aPSK; 663 #endif 664 /* Check for presence of GOST 34.10 algorithms, and if they 665 * do not present, disable appropriate auth and key exchange */ 666 if (!get_optional_pkey_id("gost94")) { 667 *auth |= SSL_aGOST94; 668 } 669 if (!get_optional_pkey_id("gost2001")) { 670 *auth |= SSL_aGOST01; 671 } 672 /* Disable GOST key exchange if no GOST signature algs are available * */ 673 if ((*auth & (SSL_aGOST94|SSL_aGOST01)) == (SSL_aGOST94|SSL_aGOST01)) { 674 *mkey |= SSL_kGOST; 675 } 676 #ifdef SSL_FORBID_ENULL 677 *enc |= SSL_eNULL; 678 #endif 679 680 681 682 *enc |= (ssl_cipher_methods[SSL_ENC_DES_IDX ] == NULL) ? SSL_DES :0; 683 *enc |= (ssl_cipher_methods[SSL_ENC_3DES_IDX] == NULL) ? SSL_3DES:0; 684 *enc |= (ssl_cipher_methods[SSL_ENC_RC4_IDX ] == NULL) ? SSL_RC4 :0; 685 *enc |= (ssl_cipher_methods[SSL_ENC_RC2_IDX ] == NULL) ? SSL_RC2 :0; 686 *enc |= (ssl_cipher_methods[SSL_ENC_IDEA_IDX] == NULL) ? SSL_IDEA:0; 687 *enc |= (ssl_cipher_methods[SSL_ENC_AES128_IDX] == NULL) ? SSL_AES128:0; 688 *enc |= (ssl_cipher_methods[SSL_ENC_AES256_IDX] == NULL) ? SSL_AES256:0; 689 *enc |= (ssl_cipher_methods[SSL_ENC_CAMELLIA128_IDX] == NULL) ? SSL_CAMELLIA128:0; 690 *enc |= (ssl_cipher_methods[SSL_ENC_CAMELLIA256_IDX] == NULL) ? SSL_CAMELLIA256:0; 691 *enc |= (ssl_cipher_methods[SSL_ENC_GOST89_IDX] == NULL) ? SSL_eGOST2814789CNT:0; 692 *enc |= (ssl_cipher_methods[SSL_ENC_SEED_IDX] == NULL) ? SSL_SEED:0; 693 694 *mac |= (ssl_digest_methods[SSL_MD_MD5_IDX ] == NULL) ? SSL_MD5 :0; 695 *mac |= (ssl_digest_methods[SSL_MD_SHA1_IDX] == NULL) ? SSL_SHA1:0; 696 *mac |= (ssl_digest_methods[SSL_MD_GOST94_IDX] == NULL) ? SSL_GOST94:0; 697 *mac |= (ssl_digest_methods[SSL_MD_GOST89MAC_IDX] == NULL || ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX]==NID_undef)? SSL_GOST89MAC:0; 698 699 } 700 701 static void ssl_cipher_collect_ciphers(const SSL_METHOD *ssl_method, 702 int num_of_ciphers, 703 unsigned long disabled_mkey, unsigned long disabled_auth, 704 unsigned long disabled_enc, unsigned long disabled_mac, 705 unsigned long disabled_ssl, 706 CIPHER_ORDER *co_list, 707 CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p) 708 { 709 int i, co_list_num; 710 const SSL_CIPHER *c; 711 712 /* 713 * We have num_of_ciphers descriptions compiled in, depending on the 714 * method selected (SSLv2 and/or SSLv3, TLSv1 etc). 715 * These will later be sorted in a linked list with at most num 716 * entries. 717 */ 718 719 /* Get the initial list of ciphers */ 720 co_list_num = 0; /* actual count of ciphers */ 721 for (i = 0; i < num_of_ciphers; i++) 722 { 723 c = ssl_method->get_cipher(i); 724 /* drop those that use any of that is not available */ 725 if ((c != NULL) && c->valid && 726 !(c->algorithm_mkey & disabled_mkey) && 727 !(c->algorithm_auth & disabled_auth) && 728 !(c->algorithm_enc & disabled_enc) && 729 !(c->algorithm_mac & disabled_mac) && 730 !(c->algorithm_ssl & disabled_ssl)) 731 { 732 co_list[co_list_num].cipher = c; 733 co_list[co_list_num].next = NULL; 734 co_list[co_list_num].prev = NULL; 735 co_list[co_list_num].active = 0; 736 co_list_num++; 737 #ifdef KSSL_DEBUG 738 printf("\t%d: %s %lx %lx %lx\n",i,c->name,c->id,c->algorithm_mkey,c->algorithm_auth); 739 #endif /* KSSL_DEBUG */ 740 /* 741 if (!sk_push(ca_list,(char *)c)) goto err; 742 */ 743 } 744 } 745 746 /* 747 * Prepare linked list from list entries 748 */ 749 if (co_list_num > 0) 750 { 751 co_list[0].prev = NULL; 752 753 if (co_list_num > 1) 754 { 755 co_list[0].next = &co_list[1]; 756 757 for (i = 1; i < co_list_num - 1; i++) 758 { 759 co_list[i].prev = &co_list[i - 1]; 760 co_list[i].next = &co_list[i + 1]; 761 } 762 763 co_list[co_list_num - 1].prev = &co_list[co_list_num - 2]; 764 } 765 766 co_list[co_list_num - 1].next = NULL; 767 768 *head_p = &co_list[0]; 769 *tail_p = &co_list[co_list_num - 1]; 770 } 771 } 772 773 static void ssl_cipher_collect_aliases(const SSL_CIPHER **ca_list, 774 int num_of_group_aliases, 775 unsigned long disabled_mkey, unsigned long disabled_auth, 776 unsigned long disabled_enc, unsigned long disabled_mac, 777 unsigned long disabled_ssl, 778 CIPHER_ORDER *head) 779 { 780 CIPHER_ORDER *ciph_curr; 781 const SSL_CIPHER **ca_curr; 782 int i; 783 unsigned long mask_mkey = ~disabled_mkey; 784 unsigned long mask_auth = ~disabled_auth; 785 unsigned long mask_enc = ~disabled_enc; 786 unsigned long mask_mac = ~disabled_mac; 787 unsigned long mask_ssl = ~disabled_ssl; 788 789 /* 790 * First, add the real ciphers as already collected 791 */ 792 ciph_curr = head; 793 ca_curr = ca_list; 794 while (ciph_curr != NULL) 795 { 796 *ca_curr = ciph_curr->cipher; 797 ca_curr++; 798 ciph_curr = ciph_curr->next; 799 } 800 801 /* 802 * Now we add the available ones from the cipher_aliases[] table. 803 * They represent either one or more algorithms, some of which 804 * in any affected category must be supported (set in enabled_mask), 805 * or represent a cipher strength value (will be added in any case because algorithms=0). 806 */ 807 for (i = 0; i < num_of_group_aliases; i++) 808 { 809 unsigned long algorithm_mkey = cipher_aliases[i].algorithm_mkey; 810 unsigned long algorithm_auth = cipher_aliases[i].algorithm_auth; 811 unsigned long algorithm_enc = cipher_aliases[i].algorithm_enc; 812 unsigned long algorithm_mac = cipher_aliases[i].algorithm_mac; 813 unsigned long algorithm_ssl = cipher_aliases[i].algorithm_ssl; 814 815 if (algorithm_mkey) 816 if ((algorithm_mkey & mask_mkey) == 0) 817 continue; 818 819 if (algorithm_auth) 820 if ((algorithm_auth & mask_auth) == 0) 821 continue; 822 823 if (algorithm_enc) 824 if ((algorithm_enc & mask_enc) == 0) 825 continue; 826 827 if (algorithm_mac) 828 if ((algorithm_mac & mask_mac) == 0) 829 continue; 830 831 if (algorithm_ssl) 832 if ((algorithm_ssl & mask_ssl) == 0) 833 continue; 834 835 *ca_curr = (SSL_CIPHER *)(cipher_aliases + i); 836 ca_curr++; 837 } 838 839 *ca_curr = NULL; /* end of list */ 840 } 841 842 static void ssl_cipher_apply_rule(unsigned long cipher_id, 843 unsigned long alg_mkey, unsigned long alg_auth, 844 unsigned long alg_enc, unsigned long alg_mac, 845 unsigned long alg_ssl, 846 unsigned long algo_strength, 847 int rule, int strength_bits, 848 CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p) 849 { 850 CIPHER_ORDER *head, *tail, *curr, *curr2, *last; 851 const SSL_CIPHER *cp; 852 int reverse = 0; 853 854 #ifdef CIPHER_DEBUG 855 printf("Applying rule %d with %08lx/%08lx/%08lx/%08lx/%08lx %08lx (%d)\n", 856 rule, alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl, algo_strength, strength_bits); 857 #endif 858 859 if (rule == CIPHER_DEL) 860 reverse = 1; /* needed to maintain sorting between currently deleted ciphers */ 861 862 head = *head_p; 863 tail = *tail_p; 864 865 if (reverse) 866 { 867 curr = tail; 868 last = head; 869 } 870 else 871 { 872 curr = head; 873 last = tail; 874 } 875 876 curr2 = curr; 877 for (;;) 878 { 879 if ((curr == NULL) || (curr == last)) break; 880 curr = curr2; 881 curr2 = reverse ? curr->prev : curr->next; 882 883 cp = curr->cipher; 884 885 /* 886 * Selection criteria is either the value of strength_bits 887 * or the algorithms used. 888 */ 889 if (strength_bits >= 0) 890 { 891 if (strength_bits != cp->strength_bits) 892 continue; 893 } 894 else 895 { 896 #ifdef CIPHER_DEBUG 897 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); 898 #endif 899 900 if (alg_mkey && !(alg_mkey & cp->algorithm_mkey)) 901 continue; 902 if (alg_auth && !(alg_auth & cp->algorithm_auth)) 903 continue; 904 if (alg_enc && !(alg_enc & cp->algorithm_enc)) 905 continue; 906 if (alg_mac && !(alg_mac & cp->algorithm_mac)) 907 continue; 908 if (alg_ssl && !(alg_ssl & cp->algorithm_ssl)) 909 continue; 910 if ((algo_strength & SSL_EXP_MASK) && !(algo_strength & SSL_EXP_MASK & cp->algo_strength)) 911 continue; 912 if ((algo_strength & SSL_STRONG_MASK) && !(algo_strength & SSL_STRONG_MASK & cp->algo_strength)) 913 continue; 914 } 915 916 #ifdef CIPHER_DEBUG 917 printf("Action = %d\n", rule); 918 #endif 919 920 /* add the cipher if it has not been added yet. */ 921 if (rule == CIPHER_ADD) 922 { 923 /* reverse == 0 */ 924 if (!curr->active) 925 { 926 ll_append_tail(&head, curr, &tail); 927 curr->active = 1; 928 } 929 } 930 /* Move the added cipher to this location */ 931 else if (rule == CIPHER_ORD) 932 { 933 /* reverse == 0 */ 934 if (curr->active) 935 { 936 ll_append_tail(&head, curr, &tail); 937 } 938 } 939 else if (rule == CIPHER_DEL) 940 { 941 /* reverse == 1 */ 942 if (curr->active) 943 { 944 /* most recently deleted ciphersuites get best positions 945 * for any future CIPHER_ADD (note that the CIPHER_DEL loop 946 * works in reverse to maintain the order) */ 947 ll_append_head(&head, curr, &tail); 948 curr->active = 0; 949 } 950 } 951 else if (rule == CIPHER_KILL) 952 { 953 /* reverse == 0 */ 954 if (head == curr) 955 head = curr->next; 956 else 957 curr->prev->next = curr->next; 958 if (tail == curr) 959 tail = curr->prev; 960 curr->active = 0; 961 if (curr->next != NULL) 962 curr->next->prev = curr->prev; 963 if (curr->prev != NULL) 964 curr->prev->next = curr->next; 965 curr->next = NULL; 966 curr->prev = NULL; 967 } 968 } 969 970 *head_p = head; 971 *tail_p = tail; 972 } 973 974 static int ssl_cipher_strength_sort(CIPHER_ORDER **head_p, 975 CIPHER_ORDER **tail_p) 976 { 977 int max_strength_bits, i, *number_uses; 978 CIPHER_ORDER *curr; 979 980 /* 981 * This routine sorts the ciphers with descending strength. The sorting 982 * must keep the pre-sorted sequence, so we apply the normal sorting 983 * routine as '+' movement to the end of the list. 984 */ 985 max_strength_bits = 0; 986 curr = *head_p; 987 while (curr != NULL) 988 { 989 if (curr->active && 990 (curr->cipher->strength_bits > max_strength_bits)) 991 max_strength_bits = curr->cipher->strength_bits; 992 curr = curr->next; 993 } 994 995 number_uses = OPENSSL_malloc((max_strength_bits + 1) * sizeof(int)); 996 if (!number_uses) 997 { 998 SSLerr(SSL_F_SSL_CIPHER_STRENGTH_SORT,ERR_R_MALLOC_FAILURE); 999 return(0); 1000 } 1001 memset(number_uses, 0, (max_strength_bits + 1) * sizeof(int)); 1002 1003 /* 1004 * Now find the strength_bits values actually used 1005 */ 1006 curr = *head_p; 1007 while (curr != NULL) 1008 { 1009 if (curr->active) 1010 number_uses[curr->cipher->strength_bits]++; 1011 curr = curr->next; 1012 } 1013 /* 1014 * Go through the list of used strength_bits values in descending 1015 * order. 1016 */ 1017 for (i = max_strength_bits; i >= 0; i--) 1018 if (number_uses[i] > 0) 1019 ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_ORD, i, head_p, tail_p); 1020 1021 OPENSSL_free(number_uses); 1022 return(1); 1023 } 1024 1025 static int ssl_cipher_process_rulestr(const char *rule_str, 1026 CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p, 1027 const SSL_CIPHER **ca_list) 1028 { 1029 unsigned long alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl, algo_strength; 1030 const char *l, *buf; 1031 int j, multi, found, rule, retval, ok, buflen; 1032 unsigned long cipher_id = 0; 1033 char ch; 1034 1035 retval = 1; 1036 l = rule_str; 1037 for (;;) 1038 { 1039 ch = *l; 1040 1041 if (ch == '\0') 1042 break; /* done */ 1043 if (ch == '-') 1044 { rule = CIPHER_DEL; l++; } 1045 else if (ch == '+') 1046 { rule = CIPHER_ORD; l++; } 1047 else if (ch == '!') 1048 { rule = CIPHER_KILL; l++; } 1049 else if (ch == '@') 1050 { rule = CIPHER_SPECIAL; l++; } 1051 else 1052 { rule = CIPHER_ADD; } 1053 1054 if (ITEM_SEP(ch)) 1055 { 1056 l++; 1057 continue; 1058 } 1059 1060 alg_mkey = 0; 1061 alg_auth = 0; 1062 alg_enc = 0; 1063 alg_mac = 0; 1064 alg_ssl = 0; 1065 algo_strength = 0; 1066 1067 for (;;) 1068 { 1069 ch = *l; 1070 buf = l; 1071 buflen = 0; 1072 #ifndef CHARSET_EBCDIC 1073 while ( ((ch >= 'A') && (ch <= 'Z')) || 1074 ((ch >= '0') && (ch <= '9')) || 1075 ((ch >= 'a') && (ch <= 'z')) || 1076 (ch == '-')) 1077 #else 1078 while ( isalnum(ch) || (ch == '-')) 1079 #endif 1080 { 1081 ch = *(++l); 1082 buflen++; 1083 } 1084 1085 if (buflen == 0) 1086 { 1087 /* 1088 * We hit something we cannot deal with, 1089 * it is no command or separator nor 1090 * alphanumeric, so we call this an error. 1091 */ 1092 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR, 1093 SSL_R_INVALID_COMMAND); 1094 retval = found = 0; 1095 l++; 1096 break; 1097 } 1098 1099 if (rule == CIPHER_SPECIAL) 1100 { 1101 found = 0; /* unused -- avoid compiler warning */ 1102 break; /* special treatment */ 1103 } 1104 1105 /* check for multi-part specification */ 1106 if (ch == '+') 1107 { 1108 multi=1; 1109 l++; 1110 } 1111 else 1112 multi=0; 1113 1114 /* 1115 * Now search for the cipher alias in the ca_list. Be careful 1116 * with the strncmp, because the "buflen" limitation 1117 * will make the rule "ADH:SOME" and the cipher 1118 * "ADH-MY-CIPHER" look like a match for buflen=3. 1119 * So additionally check whether the cipher name found 1120 * has the correct length. We can save a strlen() call: 1121 * just checking for the '\0' at the right place is 1122 * sufficient, we have to strncmp() anyway. (We cannot 1123 * use strcmp(), because buf is not '\0' terminated.) 1124 */ 1125 j = found = 0; 1126 cipher_id = 0; 1127 while (ca_list[j]) 1128 { 1129 if (!strncmp(buf, ca_list[j]->name, buflen) && 1130 (ca_list[j]->name[buflen] == '\0')) 1131 { 1132 found = 1; 1133 break; 1134 } 1135 else 1136 j++; 1137 } 1138 1139 if (!found) 1140 break; /* ignore this entry */ 1141 1142 if (ca_list[j]->algorithm_mkey) 1143 { 1144 if (alg_mkey) 1145 { 1146 alg_mkey &= ca_list[j]->algorithm_mkey; 1147 if (!alg_mkey) { found = 0; break; } 1148 } 1149 else 1150 alg_mkey = ca_list[j]->algorithm_mkey; 1151 } 1152 1153 if (ca_list[j]->algorithm_auth) 1154 { 1155 if (alg_auth) 1156 { 1157 alg_auth &= ca_list[j]->algorithm_auth; 1158 if (!alg_auth) { found = 0; break; } 1159 } 1160 else 1161 alg_auth = ca_list[j]->algorithm_auth; 1162 } 1163 1164 if (ca_list[j]->algorithm_enc) 1165 { 1166 if (alg_enc) 1167 { 1168 alg_enc &= ca_list[j]->algorithm_enc; 1169 if (!alg_enc) { found = 0; break; } 1170 } 1171 else 1172 alg_enc = ca_list[j]->algorithm_enc; 1173 } 1174 1175 if (ca_list[j]->algorithm_mac) 1176 { 1177 if (alg_mac) 1178 { 1179 alg_mac &= ca_list[j]->algorithm_mac; 1180 if (!alg_mac) { found = 0; break; } 1181 } 1182 else 1183 alg_mac = ca_list[j]->algorithm_mac; 1184 } 1185 1186 if (ca_list[j]->algo_strength & SSL_EXP_MASK) 1187 { 1188 if (algo_strength & SSL_EXP_MASK) 1189 { 1190 algo_strength &= (ca_list[j]->algo_strength & SSL_EXP_MASK) | ~SSL_EXP_MASK; 1191 if (!(algo_strength & SSL_EXP_MASK)) { found = 0; break; } 1192 } 1193 else 1194 algo_strength |= ca_list[j]->algo_strength & SSL_EXP_MASK; 1195 } 1196 1197 if (ca_list[j]->algo_strength & SSL_STRONG_MASK) 1198 { 1199 if (algo_strength & SSL_STRONG_MASK) 1200 { 1201 algo_strength &= (ca_list[j]->algo_strength & SSL_STRONG_MASK) | ~SSL_STRONG_MASK; 1202 if (!(algo_strength & SSL_STRONG_MASK)) { found = 0; break; } 1203 } 1204 else 1205 algo_strength |= ca_list[j]->algo_strength & SSL_STRONG_MASK; 1206 } 1207 1208 if (ca_list[j]->valid) 1209 { 1210 /* explicit ciphersuite found; its protocol version 1211 * does not become part of the search pattern!*/ 1212 1213 cipher_id = ca_list[j]->id; 1214 } 1215 else 1216 { 1217 /* not an explicit ciphersuite; only in this case, the 1218 * protocol version is considered part of the search pattern */ 1219 1220 if (ca_list[j]->algorithm_ssl) 1221 { 1222 if (alg_ssl) 1223 { 1224 alg_ssl &= ca_list[j]->algorithm_ssl; 1225 if (!alg_ssl) { found = 0; break; } 1226 } 1227 else 1228 alg_ssl = ca_list[j]->algorithm_ssl; 1229 } 1230 } 1231 1232 if (!multi) break; 1233 } 1234 1235 /* 1236 * Ok, we have the rule, now apply it 1237 */ 1238 if (rule == CIPHER_SPECIAL) 1239 { /* special command */ 1240 ok = 0; 1241 if ((buflen == 8) && 1242 !strncmp(buf, "STRENGTH", 8)) 1243 ok = ssl_cipher_strength_sort(head_p, tail_p); 1244 else 1245 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR, 1246 SSL_R_INVALID_COMMAND); 1247 if (ok == 0) 1248 retval = 0; 1249 /* 1250 * We do not support any "multi" options 1251 * together with "@", so throw away the 1252 * rest of the command, if any left, until 1253 * end or ':' is found. 1254 */ 1255 while ((*l != '\0') && !ITEM_SEP(*l)) 1256 l++; 1257 } 1258 else if (found) 1259 { 1260 ssl_cipher_apply_rule(cipher_id, 1261 alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl, algo_strength, 1262 rule, -1, head_p, tail_p); 1263 } 1264 else 1265 { 1266 while ((*l != '\0') && !ITEM_SEP(*l)) 1267 l++; 1268 } 1269 if (*l == '\0') break; /* done */ 1270 } 1271 1272 return(retval); 1273 } 1274 1275 STACK_OF(SSL_CIPHER) *ssl_create_cipher_list(const SSL_METHOD *ssl_method, 1276 STACK_OF(SSL_CIPHER) **cipher_list, 1277 STACK_OF(SSL_CIPHER) **cipher_list_by_id, 1278 const char *rule_str) 1279 { 1280 int ok, num_of_ciphers, num_of_alias_max, num_of_group_aliases; 1281 unsigned long disabled_mkey, disabled_auth, disabled_enc, disabled_mac, disabled_ssl; 1282 STACK_OF(SSL_CIPHER) *cipherstack, *tmp_cipher_list; 1283 const char *rule_p; 1284 CIPHER_ORDER *co_list = NULL, *head = NULL, *tail = NULL, *curr; 1285 const SSL_CIPHER **ca_list = NULL; 1286 1287 /* 1288 * Return with error if nothing to do. 1289 */ 1290 if (rule_str == NULL || cipher_list == NULL || cipher_list_by_id == NULL) 1291 return NULL; 1292 1293 /* 1294 * To reduce the work to do we only want to process the compiled 1295 * in algorithms, so we first get the mask of disabled ciphers. 1296 */ 1297 ssl_cipher_get_disabled(&disabled_mkey, &disabled_auth, &disabled_enc, &disabled_mac, &disabled_ssl); 1298 1299 /* 1300 * Now we have to collect the available ciphers from the compiled 1301 * in ciphers. We cannot get more than the number compiled in, so 1302 * it is used for allocation. 1303 */ 1304 num_of_ciphers = ssl_method->num_ciphers(); 1305 #ifdef KSSL_DEBUG 1306 printf("ssl_create_cipher_list() for %d ciphers\n", num_of_ciphers); 1307 #endif /* KSSL_DEBUG */ 1308 co_list = (CIPHER_ORDER *)OPENSSL_malloc(sizeof(CIPHER_ORDER) * num_of_ciphers); 1309 if (co_list == NULL) 1310 { 1311 SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST,ERR_R_MALLOC_FAILURE); 1312 return(NULL); /* Failure */ 1313 } 1314 1315 ssl_cipher_collect_ciphers(ssl_method, num_of_ciphers, 1316 disabled_mkey, disabled_auth, disabled_enc, disabled_mac, disabled_ssl, 1317 co_list, &head, &tail); 1318 1319 1320 /* Now arrange all ciphers by preference: */ 1321 1322 /* Everything else being equal, prefer ephemeral ECDH over other key exchange mechanisms */ 1323 ssl_cipher_apply_rule(0, SSL_kEECDH, 0, 0, 0, 0, 0, CIPHER_ADD, -1, &head, &tail); 1324 ssl_cipher_apply_rule(0, SSL_kEECDH, 0, 0, 0, 0, 0, CIPHER_DEL, -1, &head, &tail); 1325 1326 /* AES is our preferred symmetric cipher */ 1327 ssl_cipher_apply_rule(0, 0, 0, SSL_AES, 0, 0, 0, CIPHER_ADD, -1, &head, &tail); 1328 1329 /* Temporarily enable everything else for sorting */ 1330 ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_ADD, -1, &head, &tail); 1331 1332 /* Low priority for MD5 */ 1333 ssl_cipher_apply_rule(0, 0, 0, 0, SSL_MD5, 0, 0, CIPHER_ORD, -1, &head, &tail); 1334 1335 /* Move anonymous ciphers to the end. Usually, these will remain disabled. 1336 * (For applications that allow them, they aren't too bad, but we prefer 1337 * authenticated ciphers.) */ 1338 ssl_cipher_apply_rule(0, 0, SSL_aNULL, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail); 1339 1340 /* Move ciphers without forward secrecy to the end */ 1341 ssl_cipher_apply_rule(0, 0, SSL_aECDH, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail); 1342 /* ssl_cipher_apply_rule(0, 0, SSL_aDH, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail); */ 1343 ssl_cipher_apply_rule(0, SSL_kRSA, 0, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail); 1344 ssl_cipher_apply_rule(0, SSL_kPSK, 0,0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail); 1345 ssl_cipher_apply_rule(0, SSL_kKRB5, 0,0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail); 1346 1347 /* RC4 is sort-of broken -- move the the end */ 1348 ssl_cipher_apply_rule(0, 0, 0, SSL_RC4, 0, 0, 0, CIPHER_ORD, -1, &head, &tail); 1349 1350 /* Now sort by symmetric encryption strength. The above ordering remains 1351 * in force within each class */ 1352 if (!ssl_cipher_strength_sort(&head, &tail)) 1353 { 1354 OPENSSL_free(co_list); 1355 return NULL; 1356 } 1357 1358 /* Now disable everything (maintaining the ordering!) */ 1359 ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_DEL, -1, &head, &tail); 1360 1361 1362 /* 1363 * We also need cipher aliases for selecting based on the rule_str. 1364 * There might be two types of entries in the rule_str: 1) names 1365 * of ciphers themselves 2) aliases for groups of ciphers. 1366 * For 1) we need the available ciphers and for 2) the cipher 1367 * groups of cipher_aliases added together in one list (otherwise 1368 * we would be happy with just the cipher_aliases table). 1369 */ 1370 num_of_group_aliases = sizeof(cipher_aliases) / sizeof(SSL_CIPHER); 1371 num_of_alias_max = num_of_ciphers + num_of_group_aliases + 1; 1372 ca_list = OPENSSL_malloc(sizeof(SSL_CIPHER *) * num_of_alias_max); 1373 if (ca_list == NULL) 1374 { 1375 OPENSSL_free(co_list); 1376 SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST,ERR_R_MALLOC_FAILURE); 1377 return(NULL); /* Failure */ 1378 } 1379 ssl_cipher_collect_aliases(ca_list, num_of_group_aliases, 1380 disabled_mkey, disabled_auth, disabled_enc, 1381 disabled_mac, disabled_ssl, head); 1382 1383 /* 1384 * If the rule_string begins with DEFAULT, apply the default rule 1385 * before using the (possibly available) additional rules. 1386 */ 1387 ok = 1; 1388 rule_p = rule_str; 1389 if (strncmp(rule_str,"DEFAULT",7) == 0) 1390 { 1391 ok = ssl_cipher_process_rulestr(SSL_DEFAULT_CIPHER_LIST, 1392 &head, &tail, ca_list); 1393 rule_p += 7; 1394 if (*rule_p == ':') 1395 rule_p++; 1396 } 1397 1398 if (ok && (strlen(rule_p) > 0)) 1399 ok = ssl_cipher_process_rulestr(rule_p, &head, &tail, ca_list); 1400 1401 OPENSSL_free((void *)ca_list); /* Not needed anymore */ 1402 1403 if (!ok) 1404 { /* Rule processing failure */ 1405 OPENSSL_free(co_list); 1406 return(NULL); 1407 } 1408 1409 /* 1410 * Allocate new "cipherstack" for the result, return with error 1411 * if we cannot get one. 1412 */ 1413 if ((cipherstack = sk_SSL_CIPHER_new_null()) == NULL) 1414 { 1415 OPENSSL_free(co_list); 1416 return(NULL); 1417 } 1418 1419 /* 1420 * The cipher selection for the list is done. The ciphers are added 1421 * to the resulting precedence to the STACK_OF(SSL_CIPHER). 1422 */ 1423 for (curr = head; curr != NULL; curr = curr->next) 1424 { 1425 if (curr->active) 1426 { 1427 sk_SSL_CIPHER_push(cipherstack, curr->cipher); 1428 #ifdef CIPHER_DEBUG 1429 printf("<%s>\n",curr->cipher->name); 1430 #endif 1431 } 1432 } 1433 OPENSSL_free(co_list); /* Not needed any longer */ 1434 1435 tmp_cipher_list = sk_SSL_CIPHER_dup(cipherstack); 1436 if (tmp_cipher_list == NULL) 1437 { 1438 sk_SSL_CIPHER_free(cipherstack); 1439 return NULL; 1440 } 1441 if (*cipher_list != NULL) 1442 sk_SSL_CIPHER_free(*cipher_list); 1443 *cipher_list = cipherstack; 1444 if (*cipher_list_by_id != NULL) 1445 sk_SSL_CIPHER_free(*cipher_list_by_id); 1446 *cipher_list_by_id = tmp_cipher_list; 1447 (void)sk_SSL_CIPHER_set_cmp_func(*cipher_list_by_id,ssl_cipher_ptr_id_cmp); 1448 1449 sk_SSL_CIPHER_sort(*cipher_list_by_id); 1450 return(cipherstack); 1451 } 1452 1453 char *SSL_CIPHER_description(const SSL_CIPHER *cipher, char *buf, int len) 1454 { 1455 int is_export,pkl,kl; 1456 const char *ver,*exp_str; 1457 const char *kx,*au,*enc,*mac; 1458 unsigned long alg_mkey,alg_auth,alg_enc,alg_mac,alg_ssl,alg2; 1459 #ifdef KSSL_DEBUG 1460 static const char *format="%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s%s AL=%lx/%lx/%lx/%lx/%lx\n"; 1461 #else 1462 static const char *format="%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s%s\n"; 1463 #endif /* KSSL_DEBUG */ 1464 1465 alg_mkey = cipher->algorithm_mkey; 1466 alg_auth = cipher->algorithm_auth; 1467 alg_enc = cipher->algorithm_enc; 1468 alg_mac = cipher->algorithm_mac; 1469 alg_ssl = cipher->algorithm_ssl; 1470 1471 alg2=cipher->algorithm2; 1472 1473 is_export=SSL_C_IS_EXPORT(cipher); 1474 pkl=SSL_C_EXPORT_PKEYLENGTH(cipher); 1475 kl=SSL_C_EXPORT_KEYLENGTH(cipher); 1476 exp_str=is_export?" export":""; 1477 1478 if (alg_ssl & SSL_SSLV2) 1479 ver="SSLv2"; 1480 else if (alg_ssl & SSL_SSLV3) 1481 ver="SSLv3"; 1482 else 1483 ver="unknown"; 1484 1485 switch (alg_mkey) 1486 { 1487 case SSL_kRSA: 1488 kx=is_export?(pkl == 512 ? "RSA(512)" : "RSA(1024)"):"RSA"; 1489 break; 1490 case SSL_kDHr: 1491 kx="DH/RSA"; 1492 break; 1493 case SSL_kDHd: 1494 kx="DH/DSS"; 1495 break; 1496 case SSL_kKRB5: 1497 kx="KRB5"; 1498 break; 1499 case SSL_kEDH: 1500 kx=is_export?(pkl == 512 ? "DH(512)" : "DH(1024)"):"DH"; 1501 break; 1502 case SSL_kECDHr: 1503 kx="ECDH/RSA"; 1504 break; 1505 case SSL_kECDHe: 1506 kx="ECDH/ECDSA"; 1507 break; 1508 case SSL_kEECDH: 1509 kx="ECDH"; 1510 break; 1511 case SSL_kPSK: 1512 kx="PSK"; 1513 break; 1514 default: 1515 kx="unknown"; 1516 } 1517 1518 switch (alg_auth) 1519 { 1520 case SSL_aRSA: 1521 au="RSA"; 1522 break; 1523 case SSL_aDSS: 1524 au="DSS"; 1525 break; 1526 case SSL_aDH: 1527 au="DH"; 1528 break; 1529 case SSL_aKRB5: 1530 au="KRB5"; 1531 break; 1532 case SSL_aECDH: 1533 au="ECDH"; 1534 break; 1535 case SSL_aNULL: 1536 au="None"; 1537 break; 1538 case SSL_aECDSA: 1539 au="ECDSA"; 1540 break; 1541 case SSL_aPSK: 1542 au="PSK"; 1543 break; 1544 default: 1545 au="unknown"; 1546 break; 1547 } 1548 1549 switch (alg_enc) 1550 { 1551 case SSL_DES: 1552 enc=(is_export && kl == 5)?"DES(40)":"DES(56)"; 1553 break; 1554 case SSL_3DES: 1555 enc="3DES(168)"; 1556 break; 1557 case SSL_RC4: 1558 enc=is_export?(kl == 5 ? "RC4(40)" : "RC4(56)") 1559 :((alg2&SSL2_CF_8_BYTE_ENC)?"RC4(64)":"RC4(128)"); 1560 break; 1561 case SSL_RC2: 1562 enc=is_export?(kl == 5 ? "RC2(40)" : "RC2(56)"):"RC2(128)"; 1563 break; 1564 case SSL_IDEA: 1565 enc="IDEA(128)"; 1566 break; 1567 case SSL_eNULL: 1568 enc="None"; 1569 break; 1570 case SSL_AES128: 1571 enc="AES(128)"; 1572 break; 1573 case SSL_AES256: 1574 enc="AES(256)"; 1575 break; 1576 case SSL_CAMELLIA128: 1577 enc="Camellia(128)"; 1578 break; 1579 case SSL_CAMELLIA256: 1580 enc="Camellia(256)"; 1581 break; 1582 case SSL_SEED: 1583 enc="SEED(128)"; 1584 break; 1585 default: 1586 enc="unknown"; 1587 break; 1588 } 1589 1590 switch (alg_mac) 1591 { 1592 case SSL_MD5: 1593 mac="MD5"; 1594 break; 1595 case SSL_SHA1: 1596 mac="SHA1"; 1597 break; 1598 default: 1599 mac="unknown"; 1600 break; 1601 } 1602 1603 if (buf == NULL) 1604 { 1605 len=128; 1606 buf=OPENSSL_malloc(len); 1607 if (buf == NULL) return("OPENSSL_malloc Error"); 1608 } 1609 else if (len < 128) 1610 return("Buffer too small"); 1611 1612 #ifdef KSSL_DEBUG 1613 BIO_snprintf(buf,len,format,cipher->name,ver,kx,au,enc,mac,exp_str,alg_mkey,alg_auth,alg_enc,alg_mac,alg_ssl); 1614 #else 1615 BIO_snprintf(buf,len,format,cipher->name,ver,kx,au,enc,mac,exp_str); 1616 #endif /* KSSL_DEBUG */ 1617 return(buf); 1618 } 1619 1620 char *SSL_CIPHER_get_version(const SSL_CIPHER *c) 1621 { 1622 int i; 1623 1624 if (c == NULL) return("(NONE)"); 1625 i=(int)(c->id>>24L); 1626 if (i == 3) 1627 return("TLSv1/SSLv3"); 1628 else if (i == 2) 1629 return("SSLv2"); 1630 else 1631 return("unknown"); 1632 } 1633 1634 /* return the actual cipher being used */ 1635 const char *SSL_CIPHER_get_name(const SSL_CIPHER *c) 1636 { 1637 if (c != NULL) 1638 return(c->name); 1639 return("(NONE)"); 1640 } 1641 1642 /* number of bits for symmetric cipher */ 1643 int SSL_CIPHER_get_bits(const SSL_CIPHER *c, int *alg_bits) 1644 { 1645 int ret=0; 1646 1647 if (c != NULL) 1648 { 1649 if (alg_bits != NULL) *alg_bits = c->alg_bits; 1650 ret = c->strength_bits; 1651 } 1652 return(ret); 1653 } 1654 1655 /* return string version of key exchange algorithm */ 1656 const char* SSL_CIPHER_authentication_method(const SSL_CIPHER* cipher) 1657 { 1658 switch (cipher->algorithm_mkey) 1659 { 1660 case SSL_kRSA: 1661 return SSL_TXT_RSA; 1662 case SSL_kDHr: 1663 return SSL_TXT_DH "_" SSL_TXT_RSA; 1664 case SSL_kDHd: 1665 return SSL_TXT_DH "_" SSL_TXT_DSS; 1666 case SSL_kEDH: 1667 switch (cipher->algorithm_auth) 1668 { 1669 case SSL_aDSS: 1670 return "DHE_" SSL_TXT_DSS; 1671 case SSL_aRSA: 1672 return "DHE_" SSL_TXT_RSA; 1673 case SSL_aNULL: 1674 return SSL_TXT_DH "_anon"; 1675 default: 1676 return "UNKNOWN"; 1677 } 1678 case SSL_kKRB5: 1679 return SSL_TXT_KRB5; 1680 case SSL_kECDHr: 1681 return SSL_TXT_ECDH "_" SSL_TXT_RSA; 1682 case SSL_kECDHe: 1683 return SSL_TXT_ECDH "_" SSL_TXT_ECDSA; 1684 case SSL_kEECDH: 1685 switch (cipher->algorithm_auth) 1686 { 1687 case SSL_aECDSA: 1688 return "ECDHE_" SSL_TXT_ECDSA; 1689 case SSL_aRSA: 1690 return "ECDHE_" SSL_TXT_RSA; 1691 case SSL_aNULL: 1692 return SSL_TXT_ECDH "_anon"; 1693 default: 1694 return "UNKNOWN"; 1695 } 1696 default: 1697 return "UNKNOWN"; 1698 } 1699 } 1700 1701 SSL_COMP *ssl3_comp_find(STACK_OF(SSL_COMP) *sk, int n) 1702 { 1703 SSL_COMP *ctmp; 1704 int i,nn; 1705 1706 if ((n == 0) || (sk == NULL)) return(NULL); 1707 nn=sk_SSL_COMP_num(sk); 1708 for (i=0; i<nn; i++) 1709 { 1710 ctmp=sk_SSL_COMP_value(sk,i); 1711 if (ctmp->id == n) 1712 return(ctmp); 1713 } 1714 return(NULL); 1715 } 1716 1717 #ifdef OPENSSL_NO_COMP 1718 void *SSL_COMP_get_compression_methods(void) 1719 { 1720 return NULL; 1721 } 1722 int SSL_COMP_add_compression_method(int id, void *cm) 1723 { 1724 return 1; 1725 } 1726 1727 const char *SSL_COMP_get_name(const void *comp) 1728 { 1729 return NULL; 1730 } 1731 #else 1732 STACK_OF(SSL_COMP) *SSL_COMP_get_compression_methods(void) 1733 { 1734 load_builtin_compressions(); 1735 return(ssl_comp_methods); 1736 } 1737 1738 int SSL_COMP_add_compression_method(int id, COMP_METHOD *cm) 1739 { 1740 SSL_COMP *comp; 1741 1742 if (cm == NULL || cm->type == NID_undef) 1743 return 1; 1744 1745 /* According to draft-ietf-tls-compression-04.txt, the 1746 compression number ranges should be the following: 1747 1748 0 to 63: methods defined by the IETF 1749 64 to 192: external party methods assigned by IANA 1750 193 to 255: reserved for private use */ 1751 if (id < 193 || id > 255) 1752 { 1753 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,SSL_R_COMPRESSION_ID_NOT_WITHIN_PRIVATE_RANGE); 1754 return 0; 1755 } 1756 1757 MemCheck_off(); 1758 comp=(SSL_COMP *)OPENSSL_malloc(sizeof(SSL_COMP)); 1759 comp->id=id; 1760 comp->method=cm; 1761 load_builtin_compressions(); 1762 if (ssl_comp_methods 1763 && sk_SSL_COMP_find(ssl_comp_methods,comp) >= 0) 1764 { 1765 OPENSSL_free(comp); 1766 MemCheck_on(); 1767 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,SSL_R_DUPLICATE_COMPRESSION_ID); 1768 return(1); 1769 } 1770 else if ((ssl_comp_methods == NULL) 1771 || !sk_SSL_COMP_push(ssl_comp_methods,comp)) 1772 { 1773 OPENSSL_free(comp); 1774 MemCheck_on(); 1775 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,ERR_R_MALLOC_FAILURE); 1776 return(1); 1777 } 1778 else 1779 { 1780 MemCheck_on(); 1781 return(0); 1782 } 1783 } 1784 1785 const char *SSL_COMP_get_name(const COMP_METHOD *comp) 1786 { 1787 if (comp) 1788 return comp->name; 1789 return NULL; 1790 } 1791 1792 #endif 1793
