1 /* 2 * Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved. 3 * Copyright (c) 2002, Oracle and/or its affiliates. All rights reserved 4 * Copyright 2005 Nokia. All rights reserved. 5 * 6 * Licensed under the OpenSSL license (the "License"). You may not use 7 * this file except in compliance with the License. You can obtain a copy 8 * in the file LICENSE in the source distribution or at 9 * https://www.openssl.org/source/license.html 10 */ 11 12 #include <stdio.h> 13 #include <ctype.h> 14 #include <openssl/objects.h> 15 #include <openssl/comp.h> 16 #include <openssl/engine.h> 17 #include <openssl/crypto.h> 18 #include <openssl/conf.h> 19 #include "internal/nelem.h" 20 #include "ssl_locl.h" 21 #include "internal/thread_once.h" 22 #include "internal/cryptlib.h" 23 24 #define SSL_ENC_DES_IDX 0 25 #define SSL_ENC_3DES_IDX 1 26 #define SSL_ENC_RC4_IDX 2 27 #define SSL_ENC_RC2_IDX 3 28 #define SSL_ENC_IDEA_IDX 4 29 #define SSL_ENC_NULL_IDX 5 30 #define SSL_ENC_AES128_IDX 6 31 #define SSL_ENC_AES256_IDX 7 32 #define SSL_ENC_CAMELLIA128_IDX 8 33 #define SSL_ENC_CAMELLIA256_IDX 9 34 #define SSL_ENC_GOST89_IDX 10 35 #define SSL_ENC_SEED_IDX 11 36 #define SSL_ENC_AES128GCM_IDX 12 37 #define SSL_ENC_AES256GCM_IDX 13 38 #define SSL_ENC_AES128CCM_IDX 14 39 #define SSL_ENC_AES256CCM_IDX 15 40 #define SSL_ENC_AES128CCM8_IDX 16 41 #define SSL_ENC_AES256CCM8_IDX 17 42 #define SSL_ENC_GOST8912_IDX 18 43 #define SSL_ENC_CHACHA_IDX 19 44 #define SSL_ENC_ARIA128GCM_IDX 20 45 #define SSL_ENC_ARIA256GCM_IDX 21 46 #define SSL_ENC_NUM_IDX 22 47 48 /* NB: make sure indices in these tables match values above */ 49 50 typedef struct { 51 uint32_t mask; 52 int nid; 53 } ssl_cipher_table; 54 55 /* Table of NIDs for each cipher */ 56 static const ssl_cipher_table ssl_cipher_table_cipher[SSL_ENC_NUM_IDX] = { 57 {SSL_DES, NID_des_cbc}, /* SSL_ENC_DES_IDX 0 */ 58 {SSL_3DES, NID_des_ede3_cbc}, /* SSL_ENC_3DES_IDX 1 */ 59 {SSL_RC4, NID_rc4}, /* SSL_ENC_RC4_IDX 2 */ 60 {SSL_RC2, NID_rc2_cbc}, /* SSL_ENC_RC2_IDX 3 */ 61 {SSL_IDEA, NID_idea_cbc}, /* SSL_ENC_IDEA_IDX 4 */ 62 {SSL_eNULL, NID_undef}, /* SSL_ENC_NULL_IDX 5 */ 63 {SSL_AES128, NID_aes_128_cbc}, /* SSL_ENC_AES128_IDX 6 */ 64 {SSL_AES256, NID_aes_256_cbc}, /* SSL_ENC_AES256_IDX 7 */ 65 {SSL_CAMELLIA128, NID_camellia_128_cbc}, /* SSL_ENC_CAMELLIA128_IDX 8 */ 66 {SSL_CAMELLIA256, NID_camellia_256_cbc}, /* SSL_ENC_CAMELLIA256_IDX 9 */ 67 {SSL_eGOST2814789CNT, NID_gost89_cnt}, /* SSL_ENC_GOST89_IDX 10 */ 68 {SSL_SEED, NID_seed_cbc}, /* SSL_ENC_SEED_IDX 11 */ 69 {SSL_AES128GCM, NID_aes_128_gcm}, /* SSL_ENC_AES128GCM_IDX 12 */ 70 {SSL_AES256GCM, NID_aes_256_gcm}, /* SSL_ENC_AES256GCM_IDX 13 */ 71 {SSL_AES128CCM, NID_aes_128_ccm}, /* SSL_ENC_AES128CCM_IDX 14 */ 72 {SSL_AES256CCM, NID_aes_256_ccm}, /* SSL_ENC_AES256CCM_IDX 15 */ 73 {SSL_AES128CCM8, NID_aes_128_ccm}, /* SSL_ENC_AES128CCM8_IDX 16 */ 74 {SSL_AES256CCM8, NID_aes_256_ccm}, /* SSL_ENC_AES256CCM8_IDX 17 */ 75 {SSL_eGOST2814789CNT12, NID_gost89_cnt_12}, /* SSL_ENC_GOST8912_IDX 18 */ 76 {SSL_CHACHA20POLY1305, NID_chacha20_poly1305}, /* SSL_ENC_CHACHA_IDX 19 */ 77 {SSL_ARIA128GCM, NID_aria_128_gcm}, /* SSL_ENC_ARIA128GCM_IDX 20 */ 78 {SSL_ARIA256GCM, NID_aria_256_gcm}, /* SSL_ENC_ARIA256GCM_IDX 21 */ 79 }; 80 81 static const EVP_CIPHER *ssl_cipher_methods[SSL_ENC_NUM_IDX]; 82 83 #define SSL_COMP_NULL_IDX 0 84 #define SSL_COMP_ZLIB_IDX 1 85 #define SSL_COMP_NUM_IDX 2 86 87 static STACK_OF(SSL_COMP) *ssl_comp_methods = NULL; 88 89 #ifndef OPENSSL_NO_COMP 90 static CRYPTO_ONCE ssl_load_builtin_comp_once = CRYPTO_ONCE_STATIC_INIT; 91 #endif 92 93 /* 94 * Constant SSL_MAX_DIGEST equal to size of digests array should be defined 95 * in the ssl_locl.h 96 */ 97 98 #define SSL_MD_NUM_IDX SSL_MAX_DIGEST 99 100 /* NB: make sure indices in this table matches values above */ 101 static const ssl_cipher_table ssl_cipher_table_mac[SSL_MD_NUM_IDX] = { 102 {SSL_MD5, NID_md5}, /* SSL_MD_MD5_IDX 0 */ 103 {SSL_SHA1, NID_sha1}, /* SSL_MD_SHA1_IDX 1 */ 104 {SSL_GOST94, NID_id_GostR3411_94}, /* SSL_MD_GOST94_IDX 2 */ 105 {SSL_GOST89MAC, NID_id_Gost28147_89_MAC}, /* SSL_MD_GOST89MAC_IDX 3 */ 106 {SSL_SHA256, NID_sha256}, /* SSL_MD_SHA256_IDX 4 */ 107 {SSL_SHA384, NID_sha384}, /* SSL_MD_SHA384_IDX 5 */ 108 {SSL_GOST12_256, NID_id_GostR3411_2012_256}, /* SSL_MD_GOST12_256_IDX 6 */ 109 {SSL_GOST89MAC12, NID_gost_mac_12}, /* SSL_MD_GOST89MAC12_IDX 7 */ 110 {SSL_GOST12_512, NID_id_GostR3411_2012_512}, /* SSL_MD_GOST12_512_IDX 8 */ 111 {0, NID_md5_sha1}, /* SSL_MD_MD5_SHA1_IDX 9 */ 112 {0, NID_sha224}, /* SSL_MD_SHA224_IDX 10 */ 113 {0, NID_sha512} /* SSL_MD_SHA512_IDX 11 */ 114 }; 115 116 static const EVP_MD *ssl_digest_methods[SSL_MD_NUM_IDX] = { 117 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL 118 }; 119 120 /* *INDENT-OFF* */ 121 static const ssl_cipher_table ssl_cipher_table_kx[] = { 122 {SSL_kRSA, NID_kx_rsa}, 123 {SSL_kECDHE, NID_kx_ecdhe}, 124 {SSL_kDHE, NID_kx_dhe}, 125 {SSL_kECDHEPSK, NID_kx_ecdhe_psk}, 126 {SSL_kDHEPSK, NID_kx_dhe_psk}, 127 {SSL_kRSAPSK, NID_kx_rsa_psk}, 128 {SSL_kPSK, NID_kx_psk}, 129 {SSL_kSRP, NID_kx_srp}, 130 {SSL_kGOST, NID_kx_gost}, 131 {SSL_kANY, NID_kx_any} 132 }; 133 134 static const ssl_cipher_table ssl_cipher_table_auth[] = { 135 {SSL_aRSA, NID_auth_rsa}, 136 {SSL_aECDSA, NID_auth_ecdsa}, 137 {SSL_aPSK, NID_auth_psk}, 138 {SSL_aDSS, NID_auth_dss}, 139 {SSL_aGOST01, NID_auth_gost01}, 140 {SSL_aGOST12, NID_auth_gost12}, 141 {SSL_aSRP, NID_auth_srp}, 142 {SSL_aNULL, NID_auth_null}, 143 {SSL_aANY, NID_auth_any} 144 }; 145 /* *INDENT-ON* */ 146 147 /* Utility function for table lookup */ 148 static int ssl_cipher_info_find(const ssl_cipher_table * table, 149 size_t table_cnt, uint32_t mask) 150 { 151 size_t i; 152 for (i = 0; i < table_cnt; i++, table++) { 153 if (table->mask == mask) 154 return (int)i; 155 } 156 return -1; 157 } 158 159 #define ssl_cipher_info_lookup(table, x) \ 160 ssl_cipher_info_find(table, OSSL_NELEM(table), x) 161 162 /* 163 * PKEY_TYPE for GOST89MAC is known in advance, but, because implementation 164 * is engine-provided, we'll fill it only if corresponding EVP_PKEY_METHOD is 165 * found 166 */ 167 static int ssl_mac_pkey_id[SSL_MD_NUM_IDX] = { 168 /* MD5, SHA, GOST94, MAC89 */ 169 EVP_PKEY_HMAC, EVP_PKEY_HMAC, EVP_PKEY_HMAC, NID_undef, 170 /* SHA256, SHA384, GOST2012_256, MAC89-12 */ 171 EVP_PKEY_HMAC, EVP_PKEY_HMAC, EVP_PKEY_HMAC, NID_undef, 172 /* GOST2012_512 */ 173 EVP_PKEY_HMAC, 174 }; 175 176 static size_t ssl_mac_secret_size[SSL_MD_NUM_IDX]; 177 178 #define CIPHER_ADD 1 179 #define CIPHER_KILL 2 180 #define CIPHER_DEL 3 181 #define CIPHER_ORD 4 182 #define CIPHER_SPECIAL 5 183 /* 184 * Bump the ciphers to the top of the list. 185 * This rule isn't currently supported by the public cipherstring API. 186 */ 187 #define CIPHER_BUMP 6 188 189 typedef struct cipher_order_st { 190 const SSL_CIPHER *cipher; 191 int active; 192 int dead; 193 struct cipher_order_st *next, *prev; 194 } CIPHER_ORDER; 195 196 static const SSL_CIPHER cipher_aliases[] = { 197 /* "ALL" doesn't include eNULL (must be specifically enabled) */ 198 {0, SSL_TXT_ALL, NULL, 0, 0, 0, ~SSL_eNULL}, 199 /* "COMPLEMENTOFALL" */ 200 {0, SSL_TXT_CMPALL, NULL, 0, 0, 0, SSL_eNULL}, 201 202 /* 203 * "COMPLEMENTOFDEFAULT" (does *not* include ciphersuites not found in 204 * ALL!) 205 */ 206 {0, SSL_TXT_CMPDEF, NULL, 0, 0, 0, 0, 0, 0, 0, 0, 0, SSL_NOT_DEFAULT}, 207 208 /* 209 * key exchange aliases (some of those using only a single bit here 210 * combine multiple key exchange algs according to the RFCs, e.g. kDHE 211 * combines DHE_DSS and DHE_RSA) 212 */ 213 {0, SSL_TXT_kRSA, NULL, 0, SSL_kRSA}, 214 215 {0, SSL_TXT_kEDH, NULL, 0, SSL_kDHE}, 216 {0, SSL_TXT_kDHE, NULL, 0, SSL_kDHE}, 217 {0, SSL_TXT_DH, NULL, 0, SSL_kDHE}, 218 219 {0, SSL_TXT_kEECDH, NULL, 0, SSL_kECDHE}, 220 {0, SSL_TXT_kECDHE, NULL, 0, SSL_kECDHE}, 221 {0, SSL_TXT_ECDH, NULL, 0, SSL_kECDHE}, 222 223 {0, SSL_TXT_kPSK, NULL, 0, SSL_kPSK}, 224 {0, SSL_TXT_kRSAPSK, NULL, 0, SSL_kRSAPSK}, 225 {0, SSL_TXT_kECDHEPSK, NULL, 0, SSL_kECDHEPSK}, 226 {0, SSL_TXT_kDHEPSK, NULL, 0, SSL_kDHEPSK}, 227 {0, SSL_TXT_kSRP, NULL, 0, SSL_kSRP}, 228 {0, SSL_TXT_kGOST, NULL, 0, SSL_kGOST}, 229 230 /* server authentication aliases */ 231 {0, SSL_TXT_aRSA, NULL, 0, 0, SSL_aRSA}, 232 {0, SSL_TXT_aDSS, NULL, 0, 0, SSL_aDSS}, 233 {0, SSL_TXT_DSS, NULL, 0, 0, SSL_aDSS}, 234 {0, SSL_TXT_aNULL, NULL, 0, 0, SSL_aNULL}, 235 {0, SSL_TXT_aECDSA, NULL, 0, 0, SSL_aECDSA}, 236 {0, SSL_TXT_ECDSA, NULL, 0, 0, SSL_aECDSA}, 237 {0, SSL_TXT_aPSK, NULL, 0, 0, SSL_aPSK}, 238 {0, SSL_TXT_aGOST01, NULL, 0, 0, SSL_aGOST01}, 239 {0, SSL_TXT_aGOST12, NULL, 0, 0, SSL_aGOST12}, 240 {0, SSL_TXT_aGOST, NULL, 0, 0, SSL_aGOST01 | SSL_aGOST12}, 241 {0, SSL_TXT_aSRP, NULL, 0, 0, SSL_aSRP}, 242 243 /* aliases combining key exchange and server authentication */ 244 {0, SSL_TXT_EDH, NULL, 0, SSL_kDHE, ~SSL_aNULL}, 245 {0, SSL_TXT_DHE, NULL, 0, SSL_kDHE, ~SSL_aNULL}, 246 {0, SSL_TXT_EECDH, NULL, 0, SSL_kECDHE, ~SSL_aNULL}, 247 {0, SSL_TXT_ECDHE, NULL, 0, SSL_kECDHE, ~SSL_aNULL}, 248 {0, SSL_TXT_NULL, NULL, 0, 0, 0, SSL_eNULL}, 249 {0, SSL_TXT_RSA, NULL, 0, SSL_kRSA, SSL_aRSA}, 250 {0, SSL_TXT_ADH, NULL, 0, SSL_kDHE, SSL_aNULL}, 251 {0, SSL_TXT_AECDH, NULL, 0, SSL_kECDHE, SSL_aNULL}, 252 {0, SSL_TXT_PSK, NULL, 0, SSL_PSK}, 253 {0, SSL_TXT_SRP, NULL, 0, SSL_kSRP}, 254 255 /* symmetric encryption aliases */ 256 {0, SSL_TXT_3DES, NULL, 0, 0, 0, SSL_3DES}, 257 {0, SSL_TXT_RC4, NULL, 0, 0, 0, SSL_RC4}, 258 {0, SSL_TXT_RC2, NULL, 0, 0, 0, SSL_RC2}, 259 {0, SSL_TXT_IDEA, NULL, 0, 0, 0, SSL_IDEA}, 260 {0, SSL_TXT_SEED, NULL, 0, 0, 0, SSL_SEED}, 261 {0, SSL_TXT_eNULL, NULL, 0, 0, 0, SSL_eNULL}, 262 {0, SSL_TXT_GOST, NULL, 0, 0, 0, SSL_eGOST2814789CNT | SSL_eGOST2814789CNT12}, 263 {0, SSL_TXT_AES128, NULL, 0, 0, 0, 264 SSL_AES128 | SSL_AES128GCM | SSL_AES128CCM | SSL_AES128CCM8}, 265 {0, SSL_TXT_AES256, NULL, 0, 0, 0, 266 SSL_AES256 | SSL_AES256GCM | SSL_AES256CCM | SSL_AES256CCM8}, 267 {0, SSL_TXT_AES, NULL, 0, 0, 0, SSL_AES}, 268 {0, SSL_TXT_AES_GCM, NULL, 0, 0, 0, SSL_AES128GCM | SSL_AES256GCM}, 269 {0, SSL_TXT_AES_CCM, NULL, 0, 0, 0, 270 SSL_AES128CCM | SSL_AES256CCM | SSL_AES128CCM8 | SSL_AES256CCM8}, 271 {0, SSL_TXT_AES_CCM_8, NULL, 0, 0, 0, SSL_AES128CCM8 | SSL_AES256CCM8}, 272 {0, SSL_TXT_CAMELLIA128, NULL, 0, 0, 0, SSL_CAMELLIA128}, 273 {0, SSL_TXT_CAMELLIA256, NULL, 0, 0, 0, SSL_CAMELLIA256}, 274 {0, SSL_TXT_CAMELLIA, NULL, 0, 0, 0, SSL_CAMELLIA}, 275 {0, SSL_TXT_CHACHA20, NULL, 0, 0, 0, SSL_CHACHA20}, 276 277 {0, SSL_TXT_ARIA, NULL, 0, 0, 0, SSL_ARIA}, 278 {0, SSL_TXT_ARIA_GCM, NULL, 0, 0, 0, SSL_ARIA128GCM | SSL_ARIA256GCM}, 279 {0, SSL_TXT_ARIA128, NULL, 0, 0, 0, SSL_ARIA128GCM}, 280 {0, SSL_TXT_ARIA256, NULL, 0, 0, 0, SSL_ARIA256GCM}, 281 282 /* MAC aliases */ 283 {0, SSL_TXT_MD5, NULL, 0, 0, 0, 0, SSL_MD5}, 284 {0, SSL_TXT_SHA1, NULL, 0, 0, 0, 0, SSL_SHA1}, 285 {0, SSL_TXT_SHA, NULL, 0, 0, 0, 0, SSL_SHA1}, 286 {0, SSL_TXT_GOST94, NULL, 0, 0, 0, 0, SSL_GOST94}, 287 {0, SSL_TXT_GOST89MAC, NULL, 0, 0, 0, 0, SSL_GOST89MAC | SSL_GOST89MAC12}, 288 {0, SSL_TXT_SHA256, NULL, 0, 0, 0, 0, SSL_SHA256}, 289 {0, SSL_TXT_SHA384, NULL, 0, 0, 0, 0, SSL_SHA384}, 290 {0, SSL_TXT_GOST12, NULL, 0, 0, 0, 0, SSL_GOST12_256}, 291 292 /* protocol version aliases */ 293 {0, SSL_TXT_SSLV3, NULL, 0, 0, 0, 0, 0, SSL3_VERSION}, 294 {0, SSL_TXT_TLSV1, NULL, 0, 0, 0, 0, 0, TLS1_VERSION}, 295 {0, "TLSv1.0", NULL, 0, 0, 0, 0, 0, TLS1_VERSION}, 296 {0, SSL_TXT_TLSV1_2, NULL, 0, 0, 0, 0, 0, TLS1_2_VERSION}, 297 298 /* strength classes */ 299 {0, SSL_TXT_LOW, NULL, 0, 0, 0, 0, 0, 0, 0, 0, 0, SSL_LOW}, 300 {0, SSL_TXT_MEDIUM, NULL, 0, 0, 0, 0, 0, 0, 0, 0, 0, SSL_MEDIUM}, 301 {0, SSL_TXT_HIGH, NULL, 0, 0, 0, 0, 0, 0, 0, 0, 0, SSL_HIGH}, 302 /* FIPS 140-2 approved ciphersuite */ 303 {0, SSL_TXT_FIPS, NULL, 0, 0, 0, ~SSL_eNULL, 0, 0, 0, 0, 0, SSL_FIPS}, 304 305 /* "EDH-" aliases to "DHE-" labels (for backward compatibility) */ 306 {0, SSL3_TXT_EDH_DSS_DES_192_CBC3_SHA, NULL, 0, 307 SSL_kDHE, SSL_aDSS, SSL_3DES, SSL_SHA1, 0, 0, 0, 0, SSL_HIGH | SSL_FIPS}, 308 {0, SSL3_TXT_EDH_RSA_DES_192_CBC3_SHA, NULL, 0, 309 SSL_kDHE, SSL_aRSA, SSL_3DES, SSL_SHA1, 0, 0, 0, 0, SSL_HIGH | SSL_FIPS}, 310 311 }; 312 313 /* 314 * Search for public key algorithm with given name and return its pkey_id if 315 * it is available. Otherwise return 0 316 */ 317 #ifdef OPENSSL_NO_ENGINE 318 319 static int get_optional_pkey_id(const char *pkey_name) 320 { 321 const EVP_PKEY_ASN1_METHOD *ameth; 322 int pkey_id = 0; 323 ameth = EVP_PKEY_asn1_find_str(NULL, pkey_name, -1); 324 if (ameth && EVP_PKEY_asn1_get0_info(&pkey_id, NULL, NULL, NULL, NULL, 325 ameth) > 0) 326 return pkey_id; 327 return 0; 328 } 329 330 #else 331 332 static int get_optional_pkey_id(const char *pkey_name) 333 { 334 const EVP_PKEY_ASN1_METHOD *ameth; 335 ENGINE *tmpeng = NULL; 336 int pkey_id = 0; 337 ameth = EVP_PKEY_asn1_find_str(&tmpeng, pkey_name, -1); 338 if (ameth) { 339 if (EVP_PKEY_asn1_get0_info(&pkey_id, NULL, NULL, NULL, NULL, 340 ameth) <= 0) 341 pkey_id = 0; 342 } 343 ENGINE_finish(tmpeng); 344 return pkey_id; 345 } 346 347 #endif 348 349 /* masks of disabled algorithms */ 350 static uint32_t disabled_enc_mask; 351 static uint32_t disabled_mac_mask; 352 static uint32_t disabled_mkey_mask; 353 static uint32_t disabled_auth_mask; 354 355 int ssl_load_ciphers(void) 356 { 357 size_t i; 358 const ssl_cipher_table *t; 359 360 disabled_enc_mask = 0; 361 ssl_sort_cipher_list(); 362 for (i = 0, t = ssl_cipher_table_cipher; i < SSL_ENC_NUM_IDX; i++, t++) { 363 if (t->nid == NID_undef) { 364 ssl_cipher_methods[i] = NULL; 365 } else { 366 const EVP_CIPHER *cipher = EVP_get_cipherbynid(t->nid); 367 ssl_cipher_methods[i] = cipher; 368 if (cipher == NULL) 369 disabled_enc_mask |= t->mask; 370 } 371 } 372 disabled_mac_mask = 0; 373 for (i = 0, t = ssl_cipher_table_mac; i < SSL_MD_NUM_IDX; i++, t++) { 374 const EVP_MD *md = EVP_get_digestbynid(t->nid); 375 ssl_digest_methods[i] = md; 376 if (md == NULL) { 377 disabled_mac_mask |= t->mask; 378 } else { 379 int tmpsize = EVP_MD_size(md); 380 if (!ossl_assert(tmpsize >= 0)) 381 return 0; 382 ssl_mac_secret_size[i] = tmpsize; 383 } 384 } 385 /* Make sure we can access MD5 and SHA1 */ 386 if (!ossl_assert(ssl_digest_methods[SSL_MD_MD5_IDX] != NULL)) 387 return 0; 388 if (!ossl_assert(ssl_digest_methods[SSL_MD_SHA1_IDX] != NULL)) 389 return 0; 390 391 disabled_mkey_mask = 0; 392 disabled_auth_mask = 0; 393 394 #ifdef OPENSSL_NO_RSA 395 disabled_mkey_mask |= SSL_kRSA | SSL_kRSAPSK; 396 disabled_auth_mask |= SSL_aRSA; 397 #endif 398 #ifdef OPENSSL_NO_DSA 399 disabled_auth_mask |= SSL_aDSS; 400 #endif 401 #ifdef OPENSSL_NO_DH 402 disabled_mkey_mask |= SSL_kDHE | SSL_kDHEPSK; 403 #endif 404 #ifdef OPENSSL_NO_EC 405 disabled_mkey_mask |= SSL_kECDHE | SSL_kECDHEPSK; 406 disabled_auth_mask |= SSL_aECDSA; 407 #endif 408 #ifdef OPENSSL_NO_PSK 409 disabled_mkey_mask |= SSL_PSK; 410 disabled_auth_mask |= SSL_aPSK; 411 #endif 412 #ifdef OPENSSL_NO_SRP 413 disabled_mkey_mask |= SSL_kSRP; 414 #endif 415 416 /* 417 * Check for presence of GOST 34.10 algorithms, and if they are not 418 * present, disable appropriate auth and key exchange 419 */ 420 ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX] = get_optional_pkey_id("gost-mac"); 421 if (ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX]) 422 ssl_mac_secret_size[SSL_MD_GOST89MAC_IDX] = 32; 423 else 424 disabled_mac_mask |= SSL_GOST89MAC; 425 426 ssl_mac_pkey_id[SSL_MD_GOST89MAC12_IDX] = 427 get_optional_pkey_id("gost-mac-12"); 428 if (ssl_mac_pkey_id[SSL_MD_GOST89MAC12_IDX]) 429 ssl_mac_secret_size[SSL_MD_GOST89MAC12_IDX] = 32; 430 else 431 disabled_mac_mask |= SSL_GOST89MAC12; 432 433 if (!get_optional_pkey_id("gost2001")) 434 disabled_auth_mask |= SSL_aGOST01 | SSL_aGOST12; 435 if (!get_optional_pkey_id("gost2012_256")) 436 disabled_auth_mask |= SSL_aGOST12; 437 if (!get_optional_pkey_id("gost2012_512")) 438 disabled_auth_mask |= SSL_aGOST12; 439 /* 440 * Disable GOST key exchange if no GOST signature algs are available * 441 */ 442 if ((disabled_auth_mask & (SSL_aGOST01 | SSL_aGOST12)) == 443 (SSL_aGOST01 | SSL_aGOST12)) 444 disabled_mkey_mask |= SSL_kGOST; 445 446 return 1; 447 } 448 449 #ifndef OPENSSL_NO_COMP 450 451 static int sk_comp_cmp(const SSL_COMP *const *a, const SSL_COMP *const *b) 452 { 453 return ((*a)->id - (*b)->id); 454 } 455 456 DEFINE_RUN_ONCE_STATIC(do_load_builtin_compressions) 457 { 458 SSL_COMP *comp = NULL; 459 COMP_METHOD *method = COMP_zlib(); 460 461 CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_DISABLE); 462 ssl_comp_methods = sk_SSL_COMP_new(sk_comp_cmp); 463 464 if (COMP_get_type(method) != NID_undef && ssl_comp_methods != NULL) { 465 comp = OPENSSL_malloc(sizeof(*comp)); 466 if (comp != NULL) { 467 comp->method = method; 468 comp->id = SSL_COMP_ZLIB_IDX; 469 comp->name = COMP_get_name(method); 470 sk_SSL_COMP_push(ssl_comp_methods, comp); 471 sk_SSL_COMP_sort(ssl_comp_methods); 472 } 473 } 474 CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ENABLE); 475 return 1; 476 } 477 478 static int load_builtin_compressions(void) 479 { 480 return RUN_ONCE(&ssl_load_builtin_comp_once, do_load_builtin_compressions); 481 } 482 #endif 483 484 int ssl_cipher_get_evp(const SSL_SESSION *s, const EVP_CIPHER **enc, 485 const EVP_MD **md, int *mac_pkey_type, 486 size_t *mac_secret_size, SSL_COMP **comp, int use_etm) 487 { 488 int i; 489 const SSL_CIPHER *c; 490 491 c = s->cipher; 492 if (c == NULL) 493 return 0; 494 if (comp != NULL) { 495 SSL_COMP ctmp; 496 #ifndef OPENSSL_NO_COMP 497 if (!load_builtin_compressions()) { 498 /* 499 * Currently don't care, since a failure only means that 500 * ssl_comp_methods is NULL, which is perfectly OK 501 */ 502 } 503 #endif 504 *comp = NULL; 505 ctmp.id = s->compress_meth; 506 if (ssl_comp_methods != NULL) { 507 i = sk_SSL_COMP_find(ssl_comp_methods, &ctmp); 508 *comp = sk_SSL_COMP_value(ssl_comp_methods, i); 509 } 510 /* If were only interested in comp then return success */ 511 if ((enc == NULL) && (md == NULL)) 512 return 1; 513 } 514 515 if ((enc == NULL) || (md == NULL)) 516 return 0; 517 518 i = ssl_cipher_info_lookup(ssl_cipher_table_cipher, c->algorithm_enc); 519 520 if (i == -1) { 521 *enc = NULL; 522 } else { 523 if (i == SSL_ENC_NULL_IDX) 524 *enc = EVP_enc_null(); 525 else 526 *enc = ssl_cipher_methods[i]; 527 } 528 529 i = ssl_cipher_info_lookup(ssl_cipher_table_mac, c->algorithm_mac); 530 if (i == -1) { 531 *md = NULL; 532 if (mac_pkey_type != NULL) 533 *mac_pkey_type = NID_undef; 534 if (mac_secret_size != NULL) 535 *mac_secret_size = 0; 536 if (c->algorithm_mac == SSL_AEAD) 537 mac_pkey_type = NULL; 538 } else { 539 *md = ssl_digest_methods[i]; 540 if (mac_pkey_type != NULL) 541 *mac_pkey_type = ssl_mac_pkey_id[i]; 542 if (mac_secret_size != NULL) 543 *mac_secret_size = ssl_mac_secret_size[i]; 544 } 545 546 if ((*enc != NULL) && 547 (*md != NULL || (EVP_CIPHER_flags(*enc) & EVP_CIPH_FLAG_AEAD_CIPHER)) 548 && (!mac_pkey_type || *mac_pkey_type != NID_undef)) { 549 const EVP_CIPHER *evp; 550 551 if (use_etm) 552 return 1; 553 554 if (s->ssl_version >> 8 != TLS1_VERSION_MAJOR || 555 s->ssl_version < TLS1_VERSION) 556 return 1; 557 558 if (c->algorithm_enc == SSL_RC4 && 559 c->algorithm_mac == SSL_MD5 && 560 (evp = EVP_get_cipherbyname("RC4-HMAC-MD5"))) 561 *enc = evp, *md = NULL; 562 else if (c->algorithm_enc == SSL_AES128 && 563 c->algorithm_mac == SSL_SHA1 && 564 (evp = EVP_get_cipherbyname("AES-128-CBC-HMAC-SHA1"))) 565 *enc = evp, *md = NULL; 566 else if (c->algorithm_enc == SSL_AES256 && 567 c->algorithm_mac == SSL_SHA1 && 568 (evp = EVP_get_cipherbyname("AES-256-CBC-HMAC-SHA1"))) 569 *enc = evp, *md = NULL; 570 else if (c->algorithm_enc == SSL_AES128 && 571 c->algorithm_mac == SSL_SHA256 && 572 (evp = EVP_get_cipherbyname("AES-128-CBC-HMAC-SHA256"))) 573 *enc = evp, *md = NULL; 574 else if (c->algorithm_enc == SSL_AES256 && 575 c->algorithm_mac == SSL_SHA256 && 576 (evp = EVP_get_cipherbyname("AES-256-CBC-HMAC-SHA256"))) 577 *enc = evp, *md = NULL; 578 return 1; 579 } else { 580 return 0; 581 } 582 } 583 584 const EVP_MD *ssl_md(int idx) 585 { 586 idx &= SSL_HANDSHAKE_MAC_MASK; 587 if (idx < 0 || idx >= SSL_MD_NUM_IDX) 588 return NULL; 589 return ssl_digest_methods[idx]; 590 } 591 592 const EVP_MD *ssl_handshake_md(SSL *s) 593 { 594 return ssl_md(ssl_get_algorithm2(s)); 595 } 596 597 const EVP_MD *ssl_prf_md(SSL *s) 598 { 599 return ssl_md(ssl_get_algorithm2(s) >> TLS1_PRF_DGST_SHIFT); 600 } 601 602 #define ITEM_SEP(a) \ 603 (((a) == ':') || ((a) == ' ') || ((a) == ';') || ((a) == ',')) 604 605 static void ll_append_tail(CIPHER_ORDER **head, CIPHER_ORDER *curr, 606 CIPHER_ORDER **tail) 607 { 608 if (curr == *tail) 609 return; 610 if (curr == *head) 611 *head = curr->next; 612 if (curr->prev != NULL) 613 curr->prev->next = curr->next; 614 if (curr->next != NULL) 615 curr->next->prev = curr->prev; 616 (*tail)->next = curr; 617 curr->prev = *tail; 618 curr->next = NULL; 619 *tail = curr; 620 } 621 622 static void ll_append_head(CIPHER_ORDER **head, CIPHER_ORDER *curr, 623 CIPHER_ORDER **tail) 624 { 625 if (curr == *head) 626 return; 627 if (curr == *tail) 628 *tail = curr->prev; 629 if (curr->next != NULL) 630 curr->next->prev = curr->prev; 631 if (curr->prev != NULL) 632 curr->prev->next = curr->next; 633 (*head)->prev = curr; 634 curr->next = *head; 635 curr->prev = NULL; 636 *head = curr; 637 } 638 639 static void ssl_cipher_collect_ciphers(const SSL_METHOD *ssl_method, 640 int num_of_ciphers, 641 uint32_t disabled_mkey, 642 uint32_t disabled_auth, 643 uint32_t disabled_enc, 644 uint32_t disabled_mac, 645 CIPHER_ORDER *co_list, 646 CIPHER_ORDER **head_p, 647 CIPHER_ORDER **tail_p) 648 { 649 int i, co_list_num; 650 const SSL_CIPHER *c; 651 652 /* 653 * We have num_of_ciphers descriptions compiled in, depending on the 654 * method selected (SSLv3, TLSv1 etc). 655 * These will later be sorted in a linked list with at most num 656 * entries. 657 */ 658 659 /* Get the initial list of ciphers */ 660 co_list_num = 0; /* actual count of ciphers */ 661 for (i = 0; i < num_of_ciphers; i++) { 662 c = ssl_method->get_cipher(i); 663 /* drop those that use any of that is not available */ 664 if (c == NULL || !c->valid) 665 continue; 666 if ((c->algorithm_mkey & disabled_mkey) || 667 (c->algorithm_auth & disabled_auth) || 668 (c->algorithm_enc & disabled_enc) || 669 (c->algorithm_mac & disabled_mac)) 670 continue; 671 if (((ssl_method->ssl3_enc->enc_flags & SSL_ENC_FLAG_DTLS) == 0) && 672 c->min_tls == 0) 673 continue; 674 if (((ssl_method->ssl3_enc->enc_flags & SSL_ENC_FLAG_DTLS) != 0) && 675 c->min_dtls == 0) 676 continue; 677 678 co_list[co_list_num].cipher = c; 679 co_list[co_list_num].next = NULL; 680 co_list[co_list_num].prev = NULL; 681 co_list[co_list_num].active = 0; 682 co_list_num++; 683 } 684 685 /* 686 * Prepare linked list from list entries 687 */ 688 if (co_list_num > 0) { 689 co_list[0].prev = NULL; 690 691 if (co_list_num > 1) { 692 co_list[0].next = &co_list[1]; 693 694 for (i = 1; i < co_list_num - 1; i++) { 695 co_list[i].prev = &co_list[i - 1]; 696 co_list[i].next = &co_list[i + 1]; 697 } 698 699 co_list[co_list_num - 1].prev = &co_list[co_list_num - 2]; 700 } 701 702 co_list[co_list_num - 1].next = NULL; 703 704 *head_p = &co_list[0]; 705 *tail_p = &co_list[co_list_num - 1]; 706 } 707 } 708 709 static void ssl_cipher_collect_aliases(const SSL_CIPHER **ca_list, 710 int num_of_group_aliases, 711 uint32_t disabled_mkey, 712 uint32_t disabled_auth, 713 uint32_t disabled_enc, 714 uint32_t disabled_mac, 715 CIPHER_ORDER *head) 716 { 717 CIPHER_ORDER *ciph_curr; 718 const SSL_CIPHER **ca_curr; 719 int i; 720 uint32_t mask_mkey = ~disabled_mkey; 721 uint32_t mask_auth = ~disabled_auth; 722 uint32_t mask_enc = ~disabled_enc; 723 uint32_t mask_mac = ~disabled_mac; 724 725 /* 726 * First, add the real ciphers as already collected 727 */ 728 ciph_curr = head; 729 ca_curr = ca_list; 730 while (ciph_curr != NULL) { 731 *ca_curr = ciph_curr->cipher; 732 ca_curr++; 733 ciph_curr = ciph_curr->next; 734 } 735 736 /* 737 * Now we add the available ones from the cipher_aliases[] table. 738 * They represent either one or more algorithms, some of which 739 * in any affected category must be supported (set in enabled_mask), 740 * or represent a cipher strength value (will be added in any case because algorithms=0). 741 */ 742 for (i = 0; i < num_of_group_aliases; i++) { 743 uint32_t algorithm_mkey = cipher_aliases[i].algorithm_mkey; 744 uint32_t algorithm_auth = cipher_aliases[i].algorithm_auth; 745 uint32_t algorithm_enc = cipher_aliases[i].algorithm_enc; 746 uint32_t algorithm_mac = cipher_aliases[i].algorithm_mac; 747 748 if (algorithm_mkey) 749 if ((algorithm_mkey & mask_mkey) == 0) 750 continue; 751 752 if (algorithm_auth) 753 if ((algorithm_auth & mask_auth) == 0) 754 continue; 755 756 if (algorithm_enc) 757 if ((algorithm_enc & mask_enc) == 0) 758 continue; 759 760 if (algorithm_mac) 761 if ((algorithm_mac & mask_mac) == 0) 762 continue; 763 764 *ca_curr = (SSL_CIPHER *)(cipher_aliases + i); 765 ca_curr++; 766 } 767 768 *ca_curr = NULL; /* end of list */ 769 } 770 771 static void ssl_cipher_apply_rule(uint32_t cipher_id, uint32_t alg_mkey, 772 uint32_t alg_auth, uint32_t alg_enc, 773 uint32_t alg_mac, int min_tls, 774 uint32_t algo_strength, int rule, 775 int32_t strength_bits, CIPHER_ORDER **head_p, 776 CIPHER_ORDER **tail_p) 777 { 778 CIPHER_ORDER *head, *tail, *curr, *next, *last; 779 const SSL_CIPHER *cp; 780 int reverse = 0; 781 782 #ifdef CIPHER_DEBUG 783 fprintf(stderr, 784 "Applying rule %d with %08x/%08x/%08x/%08x/%08x %08x (%d)\n", 785 rule, alg_mkey, alg_auth, alg_enc, alg_mac, min_tls, 786 algo_strength, strength_bits); 787 #endif 788 789 if (rule == CIPHER_DEL || rule == CIPHER_BUMP) 790 reverse = 1; /* needed to maintain sorting between currently 791 * deleted ciphers */ 792 793 head = *head_p; 794 tail = *tail_p; 795 796 if (reverse) { 797 next = tail; 798 last = head; 799 } else { 800 next = head; 801 last = tail; 802 } 803 804 curr = NULL; 805 for (;;) { 806 if (curr == last) 807 break; 808 809 curr = next; 810 811 if (curr == NULL) 812 break; 813 814 next = reverse ? curr->prev : curr->next; 815 816 cp = curr->cipher; 817 818 /* 819 * Selection criteria is either the value of strength_bits 820 * or the algorithms used. 821 */ 822 if (strength_bits >= 0) { 823 if (strength_bits != cp->strength_bits) 824 continue; 825 } else { 826 #ifdef CIPHER_DEBUG 827 fprintf(stderr, 828 "\nName: %s:\nAlgo = %08x/%08x/%08x/%08x/%08x Algo_strength = %08x\n", 829 cp->name, cp->algorithm_mkey, cp->algorithm_auth, 830 cp->algorithm_enc, cp->algorithm_mac, cp->min_tls, 831 cp->algo_strength); 832 #endif 833 if (cipher_id != 0 && (cipher_id != cp->id)) 834 continue; 835 if (alg_mkey && !(alg_mkey & cp->algorithm_mkey)) 836 continue; 837 if (alg_auth && !(alg_auth & cp->algorithm_auth)) 838 continue; 839 if (alg_enc && !(alg_enc & cp->algorithm_enc)) 840 continue; 841 if (alg_mac && !(alg_mac & cp->algorithm_mac)) 842 continue; 843 if (min_tls && (min_tls != cp->min_tls)) 844 continue; 845 if ((algo_strength & SSL_STRONG_MASK) 846 && !(algo_strength & SSL_STRONG_MASK & cp->algo_strength)) 847 continue; 848 if ((algo_strength & SSL_DEFAULT_MASK) 849 && !(algo_strength & SSL_DEFAULT_MASK & cp->algo_strength)) 850 continue; 851 } 852 853 #ifdef CIPHER_DEBUG 854 fprintf(stderr, "Action = %d\n", rule); 855 #endif 856 857 /* add the cipher if it has not been added yet. */ 858 if (rule == CIPHER_ADD) { 859 /* reverse == 0 */ 860 if (!curr->active) { 861 ll_append_tail(&head, curr, &tail); 862 curr->active = 1; 863 } 864 } 865 /* Move the added cipher to this location */ 866 else if (rule == CIPHER_ORD) { 867 /* reverse == 0 */ 868 if (curr->active) { 869 ll_append_tail(&head, curr, &tail); 870 } 871 } else if (rule == CIPHER_DEL) { 872 /* reverse == 1 */ 873 if (curr->active) { 874 /* 875 * most recently deleted ciphersuites get best positions for 876 * any future CIPHER_ADD (note that the CIPHER_DEL loop works 877 * in reverse to maintain the order) 878 */ 879 ll_append_head(&head, curr, &tail); 880 curr->active = 0; 881 } 882 } else if (rule == CIPHER_BUMP) { 883 if (curr->active) 884 ll_append_head(&head, curr, &tail); 885 } else if (rule == CIPHER_KILL) { 886 /* reverse == 0 */ 887 if (head == curr) 888 head = curr->next; 889 else 890 curr->prev->next = curr->next; 891 if (tail == curr) 892 tail = curr->prev; 893 curr->active = 0; 894 if (curr->next != NULL) 895 curr->next->prev = curr->prev; 896 if (curr->prev != NULL) 897 curr->prev->next = curr->next; 898 curr->next = NULL; 899 curr->prev = NULL; 900 } 901 } 902 903 *head_p = head; 904 *tail_p = tail; 905 } 906 907 static int ssl_cipher_strength_sort(CIPHER_ORDER **head_p, 908 CIPHER_ORDER **tail_p) 909 { 910 int32_t max_strength_bits; 911 int i, *number_uses; 912 CIPHER_ORDER *curr; 913 914 /* 915 * This routine sorts the ciphers with descending strength. The sorting 916 * must keep the pre-sorted sequence, so we apply the normal sorting 917 * routine as '+' movement to the end of the list. 918 */ 919 max_strength_bits = 0; 920 curr = *head_p; 921 while (curr != NULL) { 922 if (curr->active && (curr->cipher->strength_bits > max_strength_bits)) 923 max_strength_bits = curr->cipher->strength_bits; 924 curr = curr->next; 925 } 926 927 number_uses = OPENSSL_zalloc(sizeof(int) * (max_strength_bits + 1)); 928 if (number_uses == NULL) { 929 SSLerr(SSL_F_SSL_CIPHER_STRENGTH_SORT, ERR_R_MALLOC_FAILURE); 930 return 0; 931 } 932 933 /* 934 * Now find the strength_bits values actually used 935 */ 936 curr = *head_p; 937 while (curr != NULL) { 938 if (curr->active) 939 number_uses[curr->cipher->strength_bits]++; 940 curr = curr->next; 941 } 942 /* 943 * Go through the list of used strength_bits values in descending 944 * order. 945 */ 946 for (i = max_strength_bits; i >= 0; i--) 947 if (number_uses[i] > 0) 948 ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_ORD, i, head_p, 949 tail_p); 950 951 OPENSSL_free(number_uses); 952 return 1; 953 } 954 955 static int ssl_cipher_process_rulestr(const char *rule_str, 956 CIPHER_ORDER **head_p, 957 CIPHER_ORDER **tail_p, 958 const SSL_CIPHER **ca_list, CERT *c) 959 { 960 uint32_t alg_mkey, alg_auth, alg_enc, alg_mac, algo_strength; 961 int min_tls; 962 const char *l, *buf; 963 int j, multi, found, rule, retval, ok, buflen; 964 uint32_t cipher_id = 0; 965 char ch; 966 967 retval = 1; 968 l = rule_str; 969 for ( ; ; ) { 970 ch = *l; 971 972 if (ch == '\0') 973 break; /* done */ 974 if (ch == '-') { 975 rule = CIPHER_DEL; 976 l++; 977 } else if (ch == '+') { 978 rule = CIPHER_ORD; 979 l++; 980 } else if (ch == '!') { 981 rule = CIPHER_KILL; 982 l++; 983 } else if (ch == '@') { 984 rule = CIPHER_SPECIAL; 985 l++; 986 } else { 987 rule = CIPHER_ADD; 988 } 989 990 if (ITEM_SEP(ch)) { 991 l++; 992 continue; 993 } 994 995 alg_mkey = 0; 996 alg_auth = 0; 997 alg_enc = 0; 998 alg_mac = 0; 999 min_tls = 0; 1000 algo_strength = 0; 1001 1002 for (;;) { 1003 ch = *l; 1004 buf = l; 1005 buflen = 0; 1006 #ifndef CHARSET_EBCDIC 1007 while (((ch >= 'A') && (ch <= 'Z')) || 1008 ((ch >= '0') && (ch <= '9')) || 1009 ((ch >= 'a') && (ch <= 'z')) || 1010 (ch == '-') || (ch == '.') || (ch == '=')) 1011 #else 1012 while (isalnum((unsigned char)ch) || (ch == '-') || (ch == '.') 1013 || (ch == '=')) 1014 #endif 1015 { 1016 ch = *(++l); 1017 buflen++; 1018 } 1019 1020 if (buflen == 0) { 1021 /* 1022 * We hit something we cannot deal with, 1023 * it is no command or separator nor 1024 * alphanumeric, so we call this an error. 1025 */ 1026 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR, SSL_R_INVALID_COMMAND); 1027 retval = found = 0; 1028 l++; 1029 break; 1030 } 1031 1032 if (rule == CIPHER_SPECIAL) { 1033 found = 0; /* unused -- avoid compiler warning */ 1034 break; /* special treatment */ 1035 } 1036 1037 /* check for multi-part specification */ 1038 if (ch == '+') { 1039 multi = 1; 1040 l++; 1041 } else { 1042 multi = 0; 1043 } 1044 1045 /* 1046 * Now search for the cipher alias in the ca_list. Be careful 1047 * with the strncmp, because the "buflen" limitation 1048 * will make the rule "ADH:SOME" and the cipher 1049 * "ADH-MY-CIPHER" look like a match for buflen=3. 1050 * So additionally check whether the cipher name found 1051 * has the correct length. We can save a strlen() call: 1052 * just checking for the '\0' at the right place is 1053 * sufficient, we have to strncmp() anyway. (We cannot 1054 * use strcmp(), because buf is not '\0' terminated.) 1055 */ 1056 j = found = 0; 1057 cipher_id = 0; 1058 while (ca_list[j]) { 1059 if (strncmp(buf, ca_list[j]->name, buflen) == 0 1060 && (ca_list[j]->name[buflen] == '\0')) { 1061 found = 1; 1062 break; 1063 } else 1064 j++; 1065 } 1066 1067 if (!found) 1068 break; /* ignore this entry */ 1069 1070 if (ca_list[j]->algorithm_mkey) { 1071 if (alg_mkey) { 1072 alg_mkey &= ca_list[j]->algorithm_mkey; 1073 if (!alg_mkey) { 1074 found = 0; 1075 break; 1076 } 1077 } else { 1078 alg_mkey = ca_list[j]->algorithm_mkey; 1079 } 1080 } 1081 1082 if (ca_list[j]->algorithm_auth) { 1083 if (alg_auth) { 1084 alg_auth &= ca_list[j]->algorithm_auth; 1085 if (!alg_auth) { 1086 found = 0; 1087 break; 1088 } 1089 } else { 1090 alg_auth = ca_list[j]->algorithm_auth; 1091 } 1092 } 1093 1094 if (ca_list[j]->algorithm_enc) { 1095 if (alg_enc) { 1096 alg_enc &= ca_list[j]->algorithm_enc; 1097 if (!alg_enc) { 1098 found = 0; 1099 break; 1100 } 1101 } else { 1102 alg_enc = ca_list[j]->algorithm_enc; 1103 } 1104 } 1105 1106 if (ca_list[j]->algorithm_mac) { 1107 if (alg_mac) { 1108 alg_mac &= ca_list[j]->algorithm_mac; 1109 if (!alg_mac) { 1110 found = 0; 1111 break; 1112 } 1113 } else { 1114 alg_mac = ca_list[j]->algorithm_mac; 1115 } 1116 } 1117 1118 if (ca_list[j]->algo_strength & SSL_STRONG_MASK) { 1119 if (algo_strength & SSL_STRONG_MASK) { 1120 algo_strength &= 1121 (ca_list[j]->algo_strength & SSL_STRONG_MASK) | 1122 ~SSL_STRONG_MASK; 1123 if (!(algo_strength & SSL_STRONG_MASK)) { 1124 found = 0; 1125 break; 1126 } 1127 } else { 1128 algo_strength = ca_list[j]->algo_strength & SSL_STRONG_MASK; 1129 } 1130 } 1131 1132 if (ca_list[j]->algo_strength & SSL_DEFAULT_MASK) { 1133 if (algo_strength & SSL_DEFAULT_MASK) { 1134 algo_strength &= 1135 (ca_list[j]->algo_strength & SSL_DEFAULT_MASK) | 1136 ~SSL_DEFAULT_MASK; 1137 if (!(algo_strength & SSL_DEFAULT_MASK)) { 1138 found = 0; 1139 break; 1140 } 1141 } else { 1142 algo_strength |= 1143 ca_list[j]->algo_strength & SSL_DEFAULT_MASK; 1144 } 1145 } 1146 1147 if (ca_list[j]->valid) { 1148 /* 1149 * explicit ciphersuite found; its protocol version does not 1150 * become part of the search pattern! 1151 */ 1152 1153 cipher_id = ca_list[j]->id; 1154 } else { 1155 /* 1156 * not an explicit ciphersuite; only in this case, the 1157 * protocol version is considered part of the search pattern 1158 */ 1159 1160 if (ca_list[j]->min_tls) { 1161 if (min_tls != 0 && min_tls != ca_list[j]->min_tls) { 1162 found = 0; 1163 break; 1164 } else { 1165 min_tls = ca_list[j]->min_tls; 1166 } 1167 } 1168 } 1169 1170 if (!multi) 1171 break; 1172 } 1173 1174 /* 1175 * Ok, we have the rule, now apply it 1176 */ 1177 if (rule == CIPHER_SPECIAL) { /* special command */ 1178 ok = 0; 1179 if ((buflen == 8) && strncmp(buf, "STRENGTH", 8) == 0) { 1180 ok = ssl_cipher_strength_sort(head_p, tail_p); 1181 } else if (buflen == 10 && strncmp(buf, "SECLEVEL=", 9) == 0) { 1182 int level = buf[9] - '0'; 1183 if (level < 0 || level > 5) { 1184 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR, 1185 SSL_R_INVALID_COMMAND); 1186 } else { 1187 c->sec_level = level; 1188 ok = 1; 1189 } 1190 } else { 1191 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR, SSL_R_INVALID_COMMAND); 1192 } 1193 if (ok == 0) 1194 retval = 0; 1195 /* 1196 * We do not support any "multi" options 1197 * together with "@", so throw away the 1198 * rest of the command, if any left, until 1199 * end or ':' is found. 1200 */ 1201 while ((*l != '\0') && !ITEM_SEP(*l)) 1202 l++; 1203 } else if (found) { 1204 ssl_cipher_apply_rule(cipher_id, 1205 alg_mkey, alg_auth, alg_enc, alg_mac, 1206 min_tls, algo_strength, rule, -1, head_p, 1207 tail_p); 1208 } else { 1209 while ((*l != '\0') && !ITEM_SEP(*l)) 1210 l++; 1211 } 1212 if (*l == '\0') 1213 break; /* done */ 1214 } 1215 1216 return retval; 1217 } 1218 1219 #ifndef OPENSSL_NO_EC 1220 static int check_suiteb_cipher_list(const SSL_METHOD *meth, CERT *c, 1221 const char **prule_str) 1222 { 1223 unsigned int suiteb_flags = 0, suiteb_comb2 = 0; 1224 if (strncmp(*prule_str, "SUITEB128ONLY", 13) == 0) { 1225 suiteb_flags = SSL_CERT_FLAG_SUITEB_128_LOS_ONLY; 1226 } else if (strncmp(*prule_str, "SUITEB128C2", 11) == 0) { 1227 suiteb_comb2 = 1; 1228 suiteb_flags = SSL_CERT_FLAG_SUITEB_128_LOS; 1229 } else if (strncmp(*prule_str, "SUITEB128", 9) == 0) { 1230 suiteb_flags = SSL_CERT_FLAG_SUITEB_128_LOS; 1231 } else if (strncmp(*prule_str, "SUITEB192", 9) == 0) { 1232 suiteb_flags = SSL_CERT_FLAG_SUITEB_192_LOS; 1233 } 1234 1235 if (suiteb_flags) { 1236 c->cert_flags &= ~SSL_CERT_FLAG_SUITEB_128_LOS; 1237 c->cert_flags |= suiteb_flags; 1238 } else { 1239 suiteb_flags = c->cert_flags & SSL_CERT_FLAG_SUITEB_128_LOS; 1240 } 1241 1242 if (!suiteb_flags) 1243 return 1; 1244 /* Check version: if TLS 1.2 ciphers allowed we can use Suite B */ 1245 1246 if (!(meth->ssl3_enc->enc_flags & SSL_ENC_FLAG_TLS1_2_CIPHERS)) { 1247 SSLerr(SSL_F_CHECK_SUITEB_CIPHER_LIST, 1248 SSL_R_AT_LEAST_TLS_1_2_NEEDED_IN_SUITEB_MODE); 1249 return 0; 1250 } 1251 # ifndef OPENSSL_NO_EC 1252 switch (suiteb_flags) { 1253 case SSL_CERT_FLAG_SUITEB_128_LOS: 1254 if (suiteb_comb2) 1255 *prule_str = "ECDHE-ECDSA-AES256-GCM-SHA384"; 1256 else 1257 *prule_str = 1258 "ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384"; 1259 break; 1260 case SSL_CERT_FLAG_SUITEB_128_LOS_ONLY: 1261 *prule_str = "ECDHE-ECDSA-AES128-GCM-SHA256"; 1262 break; 1263 case SSL_CERT_FLAG_SUITEB_192_LOS: 1264 *prule_str = "ECDHE-ECDSA-AES256-GCM-SHA384"; 1265 break; 1266 } 1267 return 1; 1268 # else 1269 SSLerr(SSL_F_CHECK_SUITEB_CIPHER_LIST, SSL_R_ECDH_REQUIRED_FOR_SUITEB_MODE); 1270 return 0; 1271 # endif 1272 } 1273 #endif 1274 1275 static int ciphersuite_cb(const char *elem, int len, void *arg) 1276 { 1277 STACK_OF(SSL_CIPHER) *ciphersuites = (STACK_OF(SSL_CIPHER) *)arg; 1278 const SSL_CIPHER *cipher; 1279 /* Arbitrary sized temp buffer for the cipher name. Should be big enough */ 1280 char name[80]; 1281 1282 if (len > (int)(sizeof(name) - 1)) { 1283 SSLerr(SSL_F_CIPHERSUITE_CB, SSL_R_NO_CIPHER_MATCH); 1284 return 0; 1285 } 1286 1287 memcpy(name, elem, len); 1288 name[len] = '\0'; 1289 1290 cipher = ssl3_get_cipher_by_std_name(name); 1291 if (cipher == NULL) { 1292 SSLerr(SSL_F_CIPHERSUITE_CB, SSL_R_NO_CIPHER_MATCH); 1293 return 0; 1294 } 1295 1296 if (!sk_SSL_CIPHER_push(ciphersuites, cipher)) { 1297 SSLerr(SSL_F_CIPHERSUITE_CB, ERR_R_INTERNAL_ERROR); 1298 return 0; 1299 } 1300 1301 return 1; 1302 } 1303 1304 int set_ciphersuites(STACK_OF(SSL_CIPHER) **currciphers, const char *str) 1305 { 1306 STACK_OF(SSL_CIPHER) *newciphers = sk_SSL_CIPHER_new_null(); 1307 1308 if (newciphers == NULL) 1309 return 0; 1310 1311 /* Parse the list. We explicitly allow an empty list */ 1312 if (*str != '\0' 1313 && !CONF_parse_list(str, ':', 1, ciphersuite_cb, newciphers)) { 1314 sk_SSL_CIPHER_free(newciphers); 1315 return 0; 1316 } 1317 sk_SSL_CIPHER_free(*currciphers); 1318 *currciphers = newciphers; 1319 1320 return 1; 1321 } 1322 1323 static int update_cipher_list_by_id(STACK_OF(SSL_CIPHER) **cipher_list_by_id, 1324 STACK_OF(SSL_CIPHER) *cipherstack) 1325 { 1326 STACK_OF(SSL_CIPHER) *tmp_cipher_list = sk_SSL_CIPHER_dup(cipherstack); 1327 1328 if (tmp_cipher_list == NULL) { 1329 return 0; 1330 } 1331 1332 sk_SSL_CIPHER_free(*cipher_list_by_id); 1333 *cipher_list_by_id = tmp_cipher_list; 1334 1335 (void)sk_SSL_CIPHER_set_cmp_func(*cipher_list_by_id, ssl_cipher_ptr_id_cmp); 1336 sk_SSL_CIPHER_sort(*cipher_list_by_id); 1337 1338 return 1; 1339 } 1340 1341 static int update_cipher_list(STACK_OF(SSL_CIPHER) **cipher_list, 1342 STACK_OF(SSL_CIPHER) **cipher_list_by_id, 1343 STACK_OF(SSL_CIPHER) *tls13_ciphersuites) 1344 { 1345 int i; 1346 STACK_OF(SSL_CIPHER) *tmp_cipher_list = sk_SSL_CIPHER_dup(*cipher_list); 1347 1348 if (tmp_cipher_list == NULL) 1349 return 0; 1350 1351 /* 1352 * Delete any existing TLSv1.3 ciphersuites. These are always first in the 1353 * list. 1354 */ 1355 while (sk_SSL_CIPHER_num(tmp_cipher_list) > 0 1356 && sk_SSL_CIPHER_value(tmp_cipher_list, 0)->min_tls 1357 == TLS1_3_VERSION) 1358 sk_SSL_CIPHER_delete(tmp_cipher_list, 0); 1359 1360 /* Insert the new TLSv1.3 ciphersuites */ 1361 for (i = 0; i < sk_SSL_CIPHER_num(tls13_ciphersuites); i++) 1362 sk_SSL_CIPHER_insert(tmp_cipher_list, 1363 sk_SSL_CIPHER_value(tls13_ciphersuites, i), i); 1364 1365 if (!update_cipher_list_by_id(cipher_list_by_id, tmp_cipher_list)) 1366 return 0; 1367 1368 sk_SSL_CIPHER_free(*cipher_list); 1369 *cipher_list = tmp_cipher_list; 1370 1371 return 1; 1372 } 1373 1374 int SSL_CTX_set_ciphersuites(SSL_CTX *ctx, const char *str) 1375 { 1376 int ret = set_ciphersuites(&(ctx->tls13_ciphersuites), str); 1377 1378 if (ret && ctx->cipher_list != NULL) { 1379 /* We already have a cipher_list, so we need to update it */ 1380 return update_cipher_list(&ctx->cipher_list, &ctx->cipher_list_by_id, 1381 ctx->tls13_ciphersuites); 1382 } 1383 1384 return ret; 1385 } 1386 1387 int SSL_set_ciphersuites(SSL *s, const char *str) 1388 { 1389 int ret = set_ciphersuites(&(s->tls13_ciphersuites), str); 1390 1391 if (ret && s->cipher_list != NULL) { 1392 /* We already have a cipher_list, so we need to update it */ 1393 return update_cipher_list(&s->cipher_list, &s->cipher_list_by_id, 1394 s->tls13_ciphersuites); 1395 } 1396 1397 return ret; 1398 } 1399 1400 STACK_OF(SSL_CIPHER) *ssl_create_cipher_list(const SSL_METHOD *ssl_method, 1401 STACK_OF(SSL_CIPHER) *tls13_ciphersuites, 1402 STACK_OF(SSL_CIPHER) **cipher_list, 1403 STACK_OF(SSL_CIPHER) **cipher_list_by_id, 1404 const char *rule_str, 1405 CERT *c) 1406 { 1407 int ok, num_of_ciphers, num_of_alias_max, num_of_group_aliases, i; 1408 uint32_t disabled_mkey, disabled_auth, disabled_enc, disabled_mac; 1409 STACK_OF(SSL_CIPHER) *cipherstack; 1410 const char *rule_p; 1411 CIPHER_ORDER *co_list = NULL, *head = NULL, *tail = NULL, *curr; 1412 const SSL_CIPHER **ca_list = NULL; 1413 1414 /* 1415 * Return with error if nothing to do. 1416 */ 1417 if (rule_str == NULL || cipher_list == NULL || cipher_list_by_id == NULL) 1418 return NULL; 1419 #ifndef OPENSSL_NO_EC 1420 if (!check_suiteb_cipher_list(ssl_method, c, &rule_str)) 1421 return NULL; 1422 #endif 1423 1424 /* 1425 * To reduce the work to do we only want to process the compiled 1426 * in algorithms, so we first get the mask of disabled ciphers. 1427 */ 1428 1429 disabled_mkey = disabled_mkey_mask; 1430 disabled_auth = disabled_auth_mask; 1431 disabled_enc = disabled_enc_mask; 1432 disabled_mac = disabled_mac_mask; 1433 1434 /* 1435 * Now we have to collect the available ciphers from the compiled 1436 * in ciphers. We cannot get more than the number compiled in, so 1437 * it is used for allocation. 1438 */ 1439 num_of_ciphers = ssl_method->num_ciphers(); 1440 1441 co_list = OPENSSL_malloc(sizeof(*co_list) * num_of_ciphers); 1442 if (co_list == NULL) { 1443 SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST, ERR_R_MALLOC_FAILURE); 1444 return NULL; /* Failure */ 1445 } 1446 1447 ssl_cipher_collect_ciphers(ssl_method, num_of_ciphers, 1448 disabled_mkey, disabled_auth, disabled_enc, 1449 disabled_mac, co_list, &head, &tail); 1450 1451 /* Now arrange all ciphers by preference. */ 1452 1453 /* 1454 * Everything else being equal, prefer ephemeral ECDH over other key 1455 * exchange mechanisms. 1456 * For consistency, prefer ECDSA over RSA (though this only matters if the 1457 * server has both certificates, and is using the DEFAULT, or a client 1458 * preference). 1459 */ 1460 ssl_cipher_apply_rule(0, SSL_kECDHE, SSL_aECDSA, 0, 0, 0, 0, CIPHER_ADD, 1461 -1, &head, &tail); 1462 ssl_cipher_apply_rule(0, SSL_kECDHE, 0, 0, 0, 0, 0, CIPHER_ADD, -1, &head, 1463 &tail); 1464 ssl_cipher_apply_rule(0, SSL_kECDHE, 0, 0, 0, 0, 0, CIPHER_DEL, -1, &head, 1465 &tail); 1466 1467 /* Within each strength group, we prefer GCM over CHACHA... */ 1468 ssl_cipher_apply_rule(0, 0, 0, SSL_AESGCM, 0, 0, 0, CIPHER_ADD, -1, 1469 &head, &tail); 1470 ssl_cipher_apply_rule(0, 0, 0, SSL_CHACHA20, 0, 0, 0, CIPHER_ADD, -1, 1471 &head, &tail); 1472 1473 /* 1474 * ...and generally, our preferred cipher is AES. 1475 * Note that AEADs will be bumped to take preference after sorting by 1476 * strength. 1477 */ 1478 ssl_cipher_apply_rule(0, 0, 0, SSL_AES ^ SSL_AESGCM, 0, 0, 0, CIPHER_ADD, 1479 -1, &head, &tail); 1480 1481 /* Temporarily enable everything else for sorting */ 1482 ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_ADD, -1, &head, &tail); 1483 1484 /* Low priority for MD5 */ 1485 ssl_cipher_apply_rule(0, 0, 0, 0, SSL_MD5, 0, 0, CIPHER_ORD, -1, &head, 1486 &tail); 1487 1488 /* 1489 * Move anonymous ciphers to the end. Usually, these will remain 1490 * disabled. (For applications that allow them, they aren't too bad, but 1491 * we prefer authenticated ciphers.) 1492 */ 1493 ssl_cipher_apply_rule(0, 0, SSL_aNULL, 0, 0, 0, 0, CIPHER_ORD, -1, &head, 1494 &tail); 1495 1496 ssl_cipher_apply_rule(0, SSL_kRSA, 0, 0, 0, 0, 0, CIPHER_ORD, -1, &head, 1497 &tail); 1498 ssl_cipher_apply_rule(0, SSL_kPSK, 0, 0, 0, 0, 0, CIPHER_ORD, -1, &head, 1499 &tail); 1500 1501 /* RC4 is sort-of broken -- move to the end */ 1502 ssl_cipher_apply_rule(0, 0, 0, SSL_RC4, 0, 0, 0, CIPHER_ORD, -1, &head, 1503 &tail); 1504 1505 /* 1506 * Now sort by symmetric encryption strength. The above ordering remains 1507 * in force within each class 1508 */ 1509 if (!ssl_cipher_strength_sort(&head, &tail)) { 1510 OPENSSL_free(co_list); 1511 return NULL; 1512 } 1513 1514 /* 1515 * Partially overrule strength sort to prefer TLS 1.2 ciphers/PRFs. 1516 * TODO(openssl-team): is there an easier way to accomplish all this? 1517 */ 1518 ssl_cipher_apply_rule(0, 0, 0, 0, 0, TLS1_2_VERSION, 0, CIPHER_BUMP, -1, 1519 &head, &tail); 1520 1521 /* 1522 * Irrespective of strength, enforce the following order: 1523 * (EC)DHE + AEAD > (EC)DHE > rest of AEAD > rest. 1524 * Within each group, ciphers remain sorted by strength and previous 1525 * preference, i.e., 1526 * 1) ECDHE > DHE 1527 * 2) GCM > CHACHA 1528 * 3) AES > rest 1529 * 4) TLS 1.2 > legacy 1530 * 1531 * Because we now bump ciphers to the top of the list, we proceed in 1532 * reverse order of preference. 1533 */ 1534 ssl_cipher_apply_rule(0, 0, 0, 0, SSL_AEAD, 0, 0, CIPHER_BUMP, -1, 1535 &head, &tail); 1536 ssl_cipher_apply_rule(0, SSL_kDHE | SSL_kECDHE, 0, 0, 0, 0, 0, 1537 CIPHER_BUMP, -1, &head, &tail); 1538 ssl_cipher_apply_rule(0, SSL_kDHE | SSL_kECDHE, 0, 0, SSL_AEAD, 0, 0, 1539 CIPHER_BUMP, -1, &head, &tail); 1540 1541 /* Now disable everything (maintaining the ordering!) */ 1542 ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_DEL, -1, &head, &tail); 1543 1544 /* 1545 * We also need cipher aliases for selecting based on the rule_str. 1546 * There might be two types of entries in the rule_str: 1) names 1547 * of ciphers themselves 2) aliases for groups of ciphers. 1548 * For 1) we need the available ciphers and for 2) the cipher 1549 * groups of cipher_aliases added together in one list (otherwise 1550 * we would be happy with just the cipher_aliases table). 1551 */ 1552 num_of_group_aliases = OSSL_NELEM(cipher_aliases); 1553 num_of_alias_max = num_of_ciphers + num_of_group_aliases + 1; 1554 ca_list = OPENSSL_malloc(sizeof(*ca_list) * num_of_alias_max); 1555 if (ca_list == NULL) { 1556 OPENSSL_free(co_list); 1557 SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST, ERR_R_MALLOC_FAILURE); 1558 return NULL; /* Failure */ 1559 } 1560 ssl_cipher_collect_aliases(ca_list, num_of_group_aliases, 1561 disabled_mkey, disabled_auth, disabled_enc, 1562 disabled_mac, head); 1563 1564 /* 1565 * If the rule_string begins with DEFAULT, apply the default rule 1566 * before using the (possibly available) additional rules. 1567 */ 1568 ok = 1; 1569 rule_p = rule_str; 1570 if (strncmp(rule_str, "DEFAULT", 7) == 0) { 1571 ok = ssl_cipher_process_rulestr(SSL_DEFAULT_CIPHER_LIST, 1572 &head, &tail, ca_list, c); 1573 rule_p += 7; 1574 if (*rule_p == ':') 1575 rule_p++; 1576 } 1577 1578 if (ok && (strlen(rule_p) > 0)) 1579 ok = ssl_cipher_process_rulestr(rule_p, &head, &tail, ca_list, c); 1580 1581 OPENSSL_free(ca_list); /* Not needed anymore */ 1582 1583 if (!ok) { /* Rule processing failure */ 1584 OPENSSL_free(co_list); 1585 return NULL; 1586 } 1587 1588 /* 1589 * Allocate new "cipherstack" for the result, return with error 1590 * if we cannot get one. 1591 */ 1592 if ((cipherstack = sk_SSL_CIPHER_new_null()) == NULL) { 1593 OPENSSL_free(co_list); 1594 return NULL; 1595 } 1596 1597 /* Add TLSv1.3 ciphers first - we always prefer those if possible */ 1598 for (i = 0; i < sk_SSL_CIPHER_num(tls13_ciphersuites); i++) { 1599 if (!sk_SSL_CIPHER_push(cipherstack, 1600 sk_SSL_CIPHER_value(tls13_ciphersuites, i))) { 1601 sk_SSL_CIPHER_free(cipherstack); 1602 return NULL; 1603 } 1604 } 1605 1606 /* 1607 * The cipher selection for the list is done. The ciphers are added 1608 * to the resulting precedence to the STACK_OF(SSL_CIPHER). 1609 */ 1610 for (curr = head; curr != NULL; curr = curr->next) { 1611 if (curr->active) { 1612 if (!sk_SSL_CIPHER_push(cipherstack, curr->cipher)) { 1613 OPENSSL_free(co_list); 1614 sk_SSL_CIPHER_free(cipherstack); 1615 return NULL; 1616 } 1617 #ifdef CIPHER_DEBUG 1618 fprintf(stderr, "<%s>\n", curr->cipher->name); 1619 #endif 1620 } 1621 } 1622 OPENSSL_free(co_list); /* Not needed any longer */ 1623 1624 if (!update_cipher_list_by_id(cipher_list_by_id, cipherstack)) { 1625 sk_SSL_CIPHER_free(cipherstack); 1626 return NULL; 1627 } 1628 sk_SSL_CIPHER_free(*cipher_list); 1629 *cipher_list = cipherstack; 1630 1631 return cipherstack; 1632 } 1633 1634 char *SSL_CIPHER_description(const SSL_CIPHER *cipher, char *buf, int len) 1635 { 1636 const char *ver; 1637 const char *kx, *au, *enc, *mac; 1638 uint32_t alg_mkey, alg_auth, alg_enc, alg_mac; 1639 static const char *format = "%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s\n"; 1640 1641 if (buf == NULL) { 1642 len = 128; 1643 if ((buf = OPENSSL_malloc(len)) == NULL) { 1644 SSLerr(SSL_F_SSL_CIPHER_DESCRIPTION, ERR_R_MALLOC_FAILURE); 1645 return NULL; 1646 } 1647 } else if (len < 128) { 1648 return NULL; 1649 } 1650 1651 alg_mkey = cipher->algorithm_mkey; 1652 alg_auth = cipher->algorithm_auth; 1653 alg_enc = cipher->algorithm_enc; 1654 alg_mac = cipher->algorithm_mac; 1655 1656 ver = ssl_protocol_to_string(cipher->min_tls); 1657 1658 switch (alg_mkey) { 1659 case SSL_kRSA: 1660 kx = "RSA"; 1661 break; 1662 case SSL_kDHE: 1663 kx = "DH"; 1664 break; 1665 case SSL_kECDHE: 1666 kx = "ECDH"; 1667 break; 1668 case SSL_kPSK: 1669 kx = "PSK"; 1670 break; 1671 case SSL_kRSAPSK: 1672 kx = "RSAPSK"; 1673 break; 1674 case SSL_kECDHEPSK: 1675 kx = "ECDHEPSK"; 1676 break; 1677 case SSL_kDHEPSK: 1678 kx = "DHEPSK"; 1679 break; 1680 case SSL_kSRP: 1681 kx = "SRP"; 1682 break; 1683 case SSL_kGOST: 1684 kx = "GOST"; 1685 break; 1686 case SSL_kANY: 1687 kx = "any"; 1688 break; 1689 default: 1690 kx = "unknown"; 1691 } 1692 1693 switch (alg_auth) { 1694 case SSL_aRSA: 1695 au = "RSA"; 1696 break; 1697 case SSL_aDSS: 1698 au = "DSS"; 1699 break; 1700 case SSL_aNULL: 1701 au = "None"; 1702 break; 1703 case SSL_aECDSA: 1704 au = "ECDSA"; 1705 break; 1706 case SSL_aPSK: 1707 au = "PSK"; 1708 break; 1709 case SSL_aSRP: 1710 au = "SRP"; 1711 break; 1712 case SSL_aGOST01: 1713 au = "GOST01"; 1714 break; 1715 /* New GOST ciphersuites have both SSL_aGOST12 and SSL_aGOST01 bits */ 1716 case (SSL_aGOST12 | SSL_aGOST01): 1717 au = "GOST12"; 1718 break; 1719 case SSL_aANY: 1720 au = "any"; 1721 break; 1722 default: 1723 au = "unknown"; 1724 break; 1725 } 1726 1727 switch (alg_enc) { 1728 case SSL_DES: 1729 enc = "DES(56)"; 1730 break; 1731 case SSL_3DES: 1732 enc = "3DES(168)"; 1733 break; 1734 case SSL_RC4: 1735 enc = "RC4(128)"; 1736 break; 1737 case SSL_RC2: 1738 enc = "RC2(128)"; 1739 break; 1740 case SSL_IDEA: 1741 enc = "IDEA(128)"; 1742 break; 1743 case SSL_eNULL: 1744 enc = "None"; 1745 break; 1746 case SSL_AES128: 1747 enc = "AES(128)"; 1748 break; 1749 case SSL_AES256: 1750 enc = "AES(256)"; 1751 break; 1752 case SSL_AES128GCM: 1753 enc = "AESGCM(128)"; 1754 break; 1755 case SSL_AES256GCM: 1756 enc = "AESGCM(256)"; 1757 break; 1758 case SSL_AES128CCM: 1759 enc = "AESCCM(128)"; 1760 break; 1761 case SSL_AES256CCM: 1762 enc = "AESCCM(256)"; 1763 break; 1764 case SSL_AES128CCM8: 1765 enc = "AESCCM8(128)"; 1766 break; 1767 case SSL_AES256CCM8: 1768 enc = "AESCCM8(256)"; 1769 break; 1770 case SSL_CAMELLIA128: 1771 enc = "Camellia(128)"; 1772 break; 1773 case SSL_CAMELLIA256: 1774 enc = "Camellia(256)"; 1775 break; 1776 case SSL_ARIA128GCM: 1777 enc = "ARIAGCM(128)"; 1778 break; 1779 case SSL_ARIA256GCM: 1780 enc = "ARIAGCM(256)"; 1781 break; 1782 case SSL_SEED: 1783 enc = "SEED(128)"; 1784 break; 1785 case SSL_eGOST2814789CNT: 1786 case SSL_eGOST2814789CNT12: 1787 enc = "GOST89(256)"; 1788 break; 1789 case SSL_CHACHA20POLY1305: 1790 enc = "CHACHA20/POLY1305(256)"; 1791 break; 1792 default: 1793 enc = "unknown"; 1794 break; 1795 } 1796 1797 switch (alg_mac) { 1798 case SSL_MD5: 1799 mac = "MD5"; 1800 break; 1801 case SSL_SHA1: 1802 mac = "SHA1"; 1803 break; 1804 case SSL_SHA256: 1805 mac = "SHA256"; 1806 break; 1807 case SSL_SHA384: 1808 mac = "SHA384"; 1809 break; 1810 case SSL_AEAD: 1811 mac = "AEAD"; 1812 break; 1813 case SSL_GOST89MAC: 1814 case SSL_GOST89MAC12: 1815 mac = "GOST89"; 1816 break; 1817 case SSL_GOST94: 1818 mac = "GOST94"; 1819 break; 1820 case SSL_GOST12_256: 1821 case SSL_GOST12_512: 1822 mac = "GOST2012"; 1823 break; 1824 default: 1825 mac = "unknown"; 1826 break; 1827 } 1828 1829 BIO_snprintf(buf, len, format, cipher->name, ver, kx, au, enc, mac); 1830 1831 return buf; 1832 } 1833 1834 const char *SSL_CIPHER_get_version(const SSL_CIPHER *c) 1835 { 1836 if (c == NULL) 1837 return "(NONE)"; 1838 1839 /* 1840 * Backwards-compatibility crutch. In almost all contexts we report TLS 1841 * 1.0 as "TLSv1", but for ciphers we report "TLSv1.0". 1842 */ 1843 if (c->min_tls == TLS1_VERSION) 1844 return "TLSv1.0"; 1845 return ssl_protocol_to_string(c->min_tls); 1846 } 1847 1848 /* return the actual cipher being used */ 1849 const char *SSL_CIPHER_get_name(const SSL_CIPHER *c) 1850 { 1851 if (c != NULL) 1852 return c->name; 1853 return "(NONE)"; 1854 } 1855 1856 /* return the actual cipher being used in RFC standard name */ 1857 const char *SSL_CIPHER_standard_name(const SSL_CIPHER *c) 1858 { 1859 if (c != NULL) 1860 return c->stdname; 1861 return "(NONE)"; 1862 } 1863 1864 /* return the OpenSSL name based on given RFC standard name */ 1865 const char *OPENSSL_cipher_name(const char *stdname) 1866 { 1867 const SSL_CIPHER *c; 1868 1869 if (stdname == NULL) 1870 return "(NONE)"; 1871 c = ssl3_get_cipher_by_std_name(stdname); 1872 return SSL_CIPHER_get_name(c); 1873 } 1874 1875 /* number of bits for symmetric cipher */ 1876 int SSL_CIPHER_get_bits(const SSL_CIPHER *c, int *alg_bits) 1877 { 1878 int ret = 0; 1879 1880 if (c != NULL) { 1881 if (alg_bits != NULL) 1882 *alg_bits = (int)c->alg_bits; 1883 ret = (int)c->strength_bits; 1884 } 1885 return ret; 1886 } 1887 1888 uint32_t SSL_CIPHER_get_id(const SSL_CIPHER *c) 1889 { 1890 return c->id; 1891 } 1892 1893 uint16_t SSL_CIPHER_get_protocol_id(const SSL_CIPHER *c) 1894 { 1895 return c->id & 0xFFFF; 1896 } 1897 1898 SSL_COMP *ssl3_comp_find(STACK_OF(SSL_COMP) *sk, int n) 1899 { 1900 SSL_COMP *ctmp; 1901 int i, nn; 1902 1903 if ((n == 0) || (sk == NULL)) 1904 return NULL; 1905 nn = sk_SSL_COMP_num(sk); 1906 for (i = 0; i < nn; i++) { 1907 ctmp = sk_SSL_COMP_value(sk, i); 1908 if (ctmp->id == n) 1909 return ctmp; 1910 } 1911 return NULL; 1912 } 1913 1914 #ifdef OPENSSL_NO_COMP 1915 STACK_OF(SSL_COMP) *SSL_COMP_get_compression_methods(void) 1916 { 1917 return NULL; 1918 } 1919 1920 STACK_OF(SSL_COMP) *SSL_COMP_set0_compression_methods(STACK_OF(SSL_COMP) 1921 *meths) 1922 { 1923 return meths; 1924 } 1925 1926 int SSL_COMP_add_compression_method(int id, COMP_METHOD *cm) 1927 { 1928 return 1; 1929 } 1930 1931 #else 1932 STACK_OF(SSL_COMP) *SSL_COMP_get_compression_methods(void) 1933 { 1934 load_builtin_compressions(); 1935 return ssl_comp_methods; 1936 } 1937 1938 STACK_OF(SSL_COMP) *SSL_COMP_set0_compression_methods(STACK_OF(SSL_COMP) 1939 *meths) 1940 { 1941 STACK_OF(SSL_COMP) *old_meths = ssl_comp_methods; 1942 ssl_comp_methods = meths; 1943 return old_meths; 1944 } 1945 1946 static void cmeth_free(SSL_COMP *cm) 1947 { 1948 OPENSSL_free(cm); 1949 } 1950 1951 void ssl_comp_free_compression_methods_int(void) 1952 { 1953 STACK_OF(SSL_COMP) *old_meths = ssl_comp_methods; 1954 ssl_comp_methods = NULL; 1955 sk_SSL_COMP_pop_free(old_meths, cmeth_free); 1956 } 1957 1958 int SSL_COMP_add_compression_method(int id, COMP_METHOD *cm) 1959 { 1960 SSL_COMP *comp; 1961 1962 if (cm == NULL || COMP_get_type(cm) == NID_undef) 1963 return 1; 1964 1965 /*- 1966 * According to draft-ietf-tls-compression-04.txt, the 1967 * compression number ranges should be the following: 1968 * 1969 * 0 to 63: methods defined by the IETF 1970 * 64 to 192: external party methods assigned by IANA 1971 * 193 to 255: reserved for private use 1972 */ 1973 if (id < 193 || id > 255) { 1974 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD, 1975 SSL_R_COMPRESSION_ID_NOT_WITHIN_PRIVATE_RANGE); 1976 return 1; 1977 } 1978 1979 CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_DISABLE); 1980 comp = OPENSSL_malloc(sizeof(*comp)); 1981 if (comp == NULL) { 1982 CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ENABLE); 1983 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD, ERR_R_MALLOC_FAILURE); 1984 return 1; 1985 } 1986 1987 comp->id = id; 1988 comp->method = cm; 1989 load_builtin_compressions(); 1990 if (ssl_comp_methods && sk_SSL_COMP_find(ssl_comp_methods, comp) >= 0) { 1991 OPENSSL_free(comp); 1992 CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ENABLE); 1993 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD, 1994 SSL_R_DUPLICATE_COMPRESSION_ID); 1995 return 1; 1996 } 1997 if (ssl_comp_methods == NULL || !sk_SSL_COMP_push(ssl_comp_methods, comp)) { 1998 OPENSSL_free(comp); 1999 CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ENABLE); 2000 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD, ERR_R_MALLOC_FAILURE); 2001 return 1; 2002 } 2003 CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ENABLE); 2004 return 0; 2005 } 2006 #endif 2007 2008 const char *SSL_COMP_get_name(const COMP_METHOD *comp) 2009 { 2010 #ifndef OPENSSL_NO_COMP 2011 return comp ? COMP_get_name(comp) : NULL; 2012 #else 2013 return NULL; 2014 #endif 2015 } 2016 2017 const char *SSL_COMP_get0_name(const SSL_COMP *comp) 2018 { 2019 #ifndef OPENSSL_NO_COMP 2020 return comp->name; 2021 #else 2022 return NULL; 2023 #endif 2024 } 2025 2026 int SSL_COMP_get_id(const SSL_COMP *comp) 2027 { 2028 #ifndef OPENSSL_NO_COMP 2029 return comp->id; 2030 #else 2031 return -1; 2032 #endif 2033 } 2034 2035 const SSL_CIPHER *ssl_get_cipher_by_char(SSL *ssl, const unsigned char *ptr, 2036 int all) 2037 { 2038 const SSL_CIPHER *c = ssl->method->get_cipher_by_char(ptr); 2039 2040 if (c == NULL || (!all && c->valid == 0)) 2041 return NULL; 2042 return c; 2043 } 2044 2045 const SSL_CIPHER *SSL_CIPHER_find(SSL *ssl, const unsigned char *ptr) 2046 { 2047 return ssl->method->get_cipher_by_char(ptr); 2048 } 2049 2050 int SSL_CIPHER_get_cipher_nid(const SSL_CIPHER *c) 2051 { 2052 int i; 2053 if (c == NULL) 2054 return NID_undef; 2055 i = ssl_cipher_info_lookup(ssl_cipher_table_cipher, c->algorithm_enc); 2056 if (i == -1) 2057 return NID_undef; 2058 return ssl_cipher_table_cipher[i].nid; 2059 } 2060 2061 int SSL_CIPHER_get_digest_nid(const SSL_CIPHER *c) 2062 { 2063 int i = ssl_cipher_info_lookup(ssl_cipher_table_mac, c->algorithm_mac); 2064 2065 if (i == -1) 2066 return NID_undef; 2067 return ssl_cipher_table_mac[i].nid; 2068 } 2069 2070 int SSL_CIPHER_get_kx_nid(const SSL_CIPHER *c) 2071 { 2072 int i = ssl_cipher_info_lookup(ssl_cipher_table_kx, c->algorithm_mkey); 2073 2074 if (i == -1) 2075 return NID_undef; 2076 return ssl_cipher_table_kx[i].nid; 2077 } 2078 2079 int SSL_CIPHER_get_auth_nid(const SSL_CIPHER *c) 2080 { 2081 int i = ssl_cipher_info_lookup(ssl_cipher_table_auth, c->algorithm_auth); 2082 2083 if (i == -1) 2084 return NID_undef; 2085 return ssl_cipher_table_auth[i].nid; 2086 } 2087 2088 const EVP_MD *SSL_CIPHER_get_handshake_digest(const SSL_CIPHER *c) 2089 { 2090 int idx = c->algorithm2 & SSL_HANDSHAKE_MAC_MASK; 2091 2092 if (idx < 0 || idx >= SSL_MD_NUM_IDX) 2093 return NULL; 2094 return ssl_digest_methods[idx]; 2095 } 2096 2097 int SSL_CIPHER_is_aead(const SSL_CIPHER *c) 2098 { 2099 return (c->algorithm_mac & SSL_AEAD) ? 1 : 0; 2100 } 2101 2102 int ssl_cipher_get_overhead(const SSL_CIPHER *c, size_t *mac_overhead, 2103 size_t *int_overhead, size_t *blocksize, 2104 size_t *ext_overhead) 2105 { 2106 size_t mac = 0, in = 0, blk = 0, out = 0; 2107 2108 /* Some hard-coded numbers for the CCM/Poly1305 MAC overhead 2109 * because there are no handy #defines for those. */ 2110 if (c->algorithm_enc & (SSL_AESGCM | SSL_ARIAGCM)) { 2111 out = EVP_GCM_TLS_EXPLICIT_IV_LEN + EVP_GCM_TLS_TAG_LEN; 2112 } else if (c->algorithm_enc & (SSL_AES128CCM | SSL_AES256CCM)) { 2113 out = EVP_CCM_TLS_EXPLICIT_IV_LEN + 16; 2114 } else if (c->algorithm_enc & (SSL_AES128CCM8 | SSL_AES256CCM8)) { 2115 out = EVP_CCM_TLS_EXPLICIT_IV_LEN + 8; 2116 } else if (c->algorithm_enc & SSL_CHACHA20POLY1305) { 2117 out = 16; 2118 } else if (c->algorithm_mac & SSL_AEAD) { 2119 /* We're supposed to have handled all the AEAD modes above */ 2120 return 0; 2121 } else { 2122 /* Non-AEAD modes. Calculate MAC/cipher overhead separately */ 2123 int digest_nid = SSL_CIPHER_get_digest_nid(c); 2124 const EVP_MD *e_md = EVP_get_digestbynid(digest_nid); 2125 2126 if (e_md == NULL) 2127 return 0; 2128 2129 mac = EVP_MD_size(e_md); 2130 if (c->algorithm_enc != SSL_eNULL) { 2131 int cipher_nid = SSL_CIPHER_get_cipher_nid(c); 2132 const EVP_CIPHER *e_ciph = EVP_get_cipherbynid(cipher_nid); 2133 2134 /* If it wasn't AEAD or SSL_eNULL, we expect it to be a 2135 known CBC cipher. */ 2136 if (e_ciph == NULL || 2137 EVP_CIPHER_mode(e_ciph) != EVP_CIPH_CBC_MODE) 2138 return 0; 2139 2140 in = 1; /* padding length byte */ 2141 out = EVP_CIPHER_iv_length(e_ciph); 2142 blk = EVP_CIPHER_block_size(e_ciph); 2143 } 2144 } 2145 2146 *mac_overhead = mac; 2147 *int_overhead = in; 2148 *blocksize = blk; 2149 *ext_overhead = out; 2150 2151 return 1; 2152 } 2153 2154 int ssl_cert_is_disabled(size_t idx) 2155 { 2156 const SSL_CERT_LOOKUP *cl = ssl_cert_lookup_by_idx(idx); 2157 2158 if (cl == NULL || (cl->amask & disabled_auth_mask) != 0) 2159 return 1; 2160 return 0; 2161 } 2162