1/* 2 * Copyright 1995-2022 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_local.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 50typedef struct { 51 uint32_t mask; 52 int nid; 53} ssl_cipher_table; 54 55/* Table of NIDs for each cipher */ 56static 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 81static 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 87static STACK_OF(SSL_COMP) *ssl_comp_methods = NULL; 88 89#ifndef OPENSSL_NO_COMP 90static 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_local.h 96 */ 97 98#define SSL_MD_NUM_IDX SSL_MAX_DIGEST 99 100/* NB: make sure indices in this table matches values above */ 101static 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 116static 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* */ 121static 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 134static 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 */ 148static 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 */ 167static 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 /* MD5/SHA1, SHA224, SHA512 */ 175 NID_undef, NID_undef, NID_undef 176}; 177 178static size_t ssl_mac_secret_size[SSL_MD_NUM_IDX]; 179 180#define CIPHER_ADD 1 181#define CIPHER_KILL 2 182#define CIPHER_DEL 3 183#define CIPHER_ORD 4 184#define CIPHER_SPECIAL 5 185/* 186 * Bump the ciphers to the top of the list. 187 * This rule isn't currently supported by the public cipherstring API. 188 */ 189#define CIPHER_BUMP 6 190 191typedef struct cipher_order_st { 192 const SSL_CIPHER *cipher; 193 int active; 194 int dead; 195 struct cipher_order_st *next, *prev; 196} CIPHER_ORDER; 197 198static const SSL_CIPHER cipher_aliases[] = { 199 /* "ALL" doesn't include eNULL (must be specifically enabled) */ 200 {0, SSL_TXT_ALL, NULL, 0, 0, 0, ~SSL_eNULL}, 201 /* "COMPLEMENTOFALL" */ 202 {0, SSL_TXT_CMPALL, NULL, 0, 0, 0, SSL_eNULL}, 203 204 /* 205 * "COMPLEMENTOFDEFAULT" (does *not* include ciphersuites not found in 206 * ALL!) 207 */ 208 {0, SSL_TXT_CMPDEF, NULL, 0, 0, 0, 0, 0, 0, 0, 0, 0, SSL_NOT_DEFAULT}, 209 210 /* 211 * key exchange aliases (some of those using only a single bit here 212 * combine multiple key exchange algs according to the RFCs, e.g. kDHE 213 * combines DHE_DSS and DHE_RSA) 214 */ 215 {0, SSL_TXT_kRSA, NULL, 0, SSL_kRSA}, 216 217 {0, SSL_TXT_kEDH, NULL, 0, SSL_kDHE}, 218 {0, SSL_TXT_kDHE, NULL, 0, SSL_kDHE}, 219 {0, SSL_TXT_DH, NULL, 0, SSL_kDHE}, 220 221 {0, SSL_TXT_kEECDH, NULL, 0, SSL_kECDHE}, 222 {0, SSL_TXT_kECDHE, NULL, 0, SSL_kECDHE}, 223 {0, SSL_TXT_ECDH, NULL, 0, SSL_kECDHE}, 224 225 {0, SSL_TXT_kPSK, NULL, 0, SSL_kPSK}, 226 {0, SSL_TXT_kRSAPSK, NULL, 0, SSL_kRSAPSK}, 227 {0, SSL_TXT_kECDHEPSK, NULL, 0, SSL_kECDHEPSK}, 228 {0, SSL_TXT_kDHEPSK, NULL, 0, SSL_kDHEPSK}, 229 {0, SSL_TXT_kSRP, NULL, 0, SSL_kSRP}, 230 {0, SSL_TXT_kGOST, NULL, 0, SSL_kGOST}, 231 232 /* server authentication aliases */ 233 {0, SSL_TXT_aRSA, NULL, 0, 0, SSL_aRSA}, 234 {0, SSL_TXT_aDSS, NULL, 0, 0, SSL_aDSS}, 235 {0, SSL_TXT_DSS, NULL, 0, 0, SSL_aDSS}, 236 {0, SSL_TXT_aNULL, NULL, 0, 0, SSL_aNULL}, 237 {0, SSL_TXT_aECDSA, NULL, 0, 0, SSL_aECDSA}, 238 {0, SSL_TXT_ECDSA, NULL, 0, 0, SSL_aECDSA}, 239 {0, SSL_TXT_aPSK, NULL, 0, 0, SSL_aPSK}, 240 {0, SSL_TXT_aGOST01, NULL, 0, 0, SSL_aGOST01}, 241 {0, SSL_TXT_aGOST12, NULL, 0, 0, SSL_aGOST12}, 242 {0, SSL_TXT_aGOST, NULL, 0, 0, SSL_aGOST01 | SSL_aGOST12}, 243 {0, SSL_TXT_aSRP, NULL, 0, 0, SSL_aSRP}, 244 245 /* aliases combining key exchange and server authentication */ 246 {0, SSL_TXT_EDH, NULL, 0, SSL_kDHE, ~SSL_aNULL}, 247 {0, SSL_TXT_DHE, NULL, 0, SSL_kDHE, ~SSL_aNULL}, 248 {0, SSL_TXT_EECDH, NULL, 0, SSL_kECDHE, ~SSL_aNULL}, 249 {0, SSL_TXT_ECDHE, NULL, 0, SSL_kECDHE, ~SSL_aNULL}, 250 {0, SSL_TXT_NULL, NULL, 0, 0, 0, SSL_eNULL}, 251 {0, SSL_TXT_RSA, NULL, 0, SSL_kRSA, SSL_aRSA}, 252 {0, SSL_TXT_ADH, NULL, 0, SSL_kDHE, SSL_aNULL}, 253 {0, SSL_TXT_AECDH, NULL, 0, SSL_kECDHE, SSL_aNULL}, 254 {0, SSL_TXT_PSK, NULL, 0, SSL_PSK}, 255 {0, SSL_TXT_SRP, NULL, 0, SSL_kSRP}, 256 257 /* symmetric encryption aliases */ 258 {0, SSL_TXT_3DES, NULL, 0, 0, 0, SSL_3DES}, 259 {0, SSL_TXT_RC4, NULL, 0, 0, 0, SSL_RC4}, 260 {0, SSL_TXT_RC2, NULL, 0, 0, 0, SSL_RC2}, 261 {0, SSL_TXT_IDEA, NULL, 0, 0, 0, SSL_IDEA}, 262 {0, SSL_TXT_SEED, NULL, 0, 0, 0, SSL_SEED}, 263 {0, SSL_TXT_eNULL, NULL, 0, 0, 0, SSL_eNULL}, 264 {0, SSL_TXT_GOST, NULL, 0, 0, 0, SSL_eGOST2814789CNT | SSL_eGOST2814789CNT12}, 265 {0, SSL_TXT_AES128, NULL, 0, 0, 0, 266 SSL_AES128 | SSL_AES128GCM | SSL_AES128CCM | SSL_AES128CCM8}, 267 {0, SSL_TXT_AES256, NULL, 0, 0, 0, 268 SSL_AES256 | SSL_AES256GCM | SSL_AES256CCM | SSL_AES256CCM8}, 269 {0, SSL_TXT_AES, NULL, 0, 0, 0, SSL_AES}, 270 {0, SSL_TXT_AES_GCM, NULL, 0, 0, 0, SSL_AES128GCM | SSL_AES256GCM}, 271 {0, SSL_TXT_AES_CCM, NULL, 0, 0, 0, 272 SSL_AES128CCM | SSL_AES256CCM | SSL_AES128CCM8 | SSL_AES256CCM8}, 273 {0, SSL_TXT_AES_CCM_8, NULL, 0, 0, 0, SSL_AES128CCM8 | SSL_AES256CCM8}, 274 {0, SSL_TXT_CAMELLIA128, NULL, 0, 0, 0, SSL_CAMELLIA128}, 275 {0, SSL_TXT_CAMELLIA256, NULL, 0, 0, 0, SSL_CAMELLIA256}, 276 {0, SSL_TXT_CAMELLIA, NULL, 0, 0, 0, SSL_CAMELLIA}, 277 {0, SSL_TXT_CHACHA20, NULL, 0, 0, 0, SSL_CHACHA20}, 278 279 {0, SSL_TXT_ARIA, NULL, 0, 0, 0, SSL_ARIA}, 280 {0, SSL_TXT_ARIA_GCM, NULL, 0, 0, 0, SSL_ARIA128GCM | SSL_ARIA256GCM}, 281 {0, SSL_TXT_ARIA128, NULL, 0, 0, 0, SSL_ARIA128GCM}, 282 {0, SSL_TXT_ARIA256, NULL, 0, 0, 0, SSL_ARIA256GCM}, 283 284 /* MAC aliases */ 285 {0, SSL_TXT_MD5, NULL, 0, 0, 0, 0, SSL_MD5}, 286 {0, SSL_TXT_SHA1, NULL, 0, 0, 0, 0, SSL_SHA1}, 287 {0, SSL_TXT_SHA, NULL, 0, 0, 0, 0, SSL_SHA1}, 288 {0, SSL_TXT_GOST94, NULL, 0, 0, 0, 0, SSL_GOST94}, 289 {0, SSL_TXT_GOST89MAC, NULL, 0, 0, 0, 0, SSL_GOST89MAC | SSL_GOST89MAC12}, 290 {0, SSL_TXT_SHA256, NULL, 0, 0, 0, 0, SSL_SHA256}, 291 {0, SSL_TXT_SHA384, NULL, 0, 0, 0, 0, SSL_SHA384}, 292 {0, SSL_TXT_GOST12, NULL, 0, 0, 0, 0, SSL_GOST12_256}, 293 294 /* protocol version aliases */ 295 {0, SSL_TXT_SSLV3, NULL, 0, 0, 0, 0, 0, SSL3_VERSION}, 296 {0, SSL_TXT_TLSV1, NULL, 0, 0, 0, 0, 0, TLS1_VERSION}, 297 {0, "TLSv1.0", NULL, 0, 0, 0, 0, 0, TLS1_VERSION}, 298 {0, SSL_TXT_TLSV1_2, NULL, 0, 0, 0, 0, 0, TLS1_2_VERSION}, 299 300 /* strength classes */ 301 {0, SSL_TXT_LOW, NULL, 0, 0, 0, 0, 0, 0, 0, 0, 0, SSL_LOW}, 302 {0, SSL_TXT_MEDIUM, NULL, 0, 0, 0, 0, 0, 0, 0, 0, 0, SSL_MEDIUM}, 303 {0, SSL_TXT_HIGH, NULL, 0, 0, 0, 0, 0, 0, 0, 0, 0, SSL_HIGH}, 304 /* FIPS 140-2 approved ciphersuite */ 305 {0, SSL_TXT_FIPS, NULL, 0, 0, 0, ~SSL_eNULL, 0, 0, 0, 0, 0, SSL_FIPS}, 306 307 /* "EDH-" aliases to "DHE-" labels (for backward compatibility) */ 308 {0, SSL3_TXT_EDH_DSS_DES_192_CBC3_SHA, NULL, 0, 309 SSL_kDHE, SSL_aDSS, SSL_3DES, SSL_SHA1, 0, 0, 0, 0, SSL_HIGH | SSL_FIPS}, 310 {0, SSL3_TXT_EDH_RSA_DES_192_CBC3_SHA, NULL, 0, 311 SSL_kDHE, SSL_aRSA, SSL_3DES, SSL_SHA1, 0, 0, 0, 0, SSL_HIGH | SSL_FIPS}, 312 313}; 314 315/* 316 * Search for public key algorithm with given name and return its pkey_id if 317 * it is available. Otherwise return 0 318 */ 319#ifdef OPENSSL_NO_ENGINE 320 321static int get_optional_pkey_id(const char *pkey_name) 322{ 323 const EVP_PKEY_ASN1_METHOD *ameth; 324 int pkey_id = 0; 325 ameth = EVP_PKEY_asn1_find_str(NULL, pkey_name, -1); 326 if (ameth && EVP_PKEY_asn1_get0_info(&pkey_id, NULL, NULL, NULL, NULL, 327 ameth) > 0) 328 return pkey_id; 329 return 0; 330} 331 332#else 333 334static int get_optional_pkey_id(const char *pkey_name) 335{ 336 const EVP_PKEY_ASN1_METHOD *ameth; 337 ENGINE *tmpeng = NULL; 338 int pkey_id = 0; 339 ameth = EVP_PKEY_asn1_find_str(&tmpeng, pkey_name, -1); 340 if (ameth) { 341 if (EVP_PKEY_asn1_get0_info(&pkey_id, NULL, NULL, NULL, NULL, 342 ameth) <= 0) 343 pkey_id = 0; 344 } 345 ENGINE_finish(tmpeng); 346 return pkey_id; 347} 348 349#endif 350 351/* masks of disabled algorithms */ 352static uint32_t disabled_enc_mask; 353static uint32_t disabled_mac_mask; 354static uint32_t disabled_mkey_mask; 355static uint32_t disabled_auth_mask; 356 357int ssl_load_ciphers(void) 358{ 359 size_t i; 360 const ssl_cipher_table *t; 361 362 disabled_enc_mask = 0; 363 ssl_sort_cipher_list(); 364 for (i = 0, t = ssl_cipher_table_cipher; i < SSL_ENC_NUM_IDX; i++, t++) { 365 if (t->nid == NID_undef) { 366 ssl_cipher_methods[i] = NULL; 367 } else { 368 const EVP_CIPHER *cipher = EVP_get_cipherbynid(t->nid); 369 ssl_cipher_methods[i] = cipher; 370 if (cipher == NULL) 371 disabled_enc_mask |= t->mask; 372 } 373 } 374 disabled_mac_mask = 0; 375 for (i = 0, t = ssl_cipher_table_mac; i < SSL_MD_NUM_IDX; i++, t++) { 376 const EVP_MD *md = EVP_get_digestbynid(t->nid); 377 ssl_digest_methods[i] = md; 378 if (md == NULL) { 379 disabled_mac_mask |= t->mask; 380 } else { 381 int tmpsize = EVP_MD_size(md); 382 if (!ossl_assert(tmpsize >= 0)) 383 return 0; 384 ssl_mac_secret_size[i] = tmpsize; 385 } 386 } 387 /* Make sure we can access MD5 and SHA1 */ 388 if (!ossl_assert(ssl_digest_methods[SSL_MD_MD5_IDX] != NULL)) 389 return 0; 390 if (!ossl_assert(ssl_digest_methods[SSL_MD_SHA1_IDX] != NULL)) 391 return 0; 392 393 disabled_mkey_mask = 0; 394 disabled_auth_mask = 0; 395 396#ifdef OPENSSL_NO_RSA 397 disabled_mkey_mask |= SSL_kRSA | SSL_kRSAPSK; 398 disabled_auth_mask |= SSL_aRSA; 399#endif 400#ifdef OPENSSL_NO_DSA 401 disabled_auth_mask |= SSL_aDSS; 402#endif 403#ifdef OPENSSL_NO_DH 404 disabled_mkey_mask |= SSL_kDHE | SSL_kDHEPSK; 405#endif 406#ifdef OPENSSL_NO_EC 407 disabled_mkey_mask |= SSL_kECDHE | SSL_kECDHEPSK; 408 disabled_auth_mask |= SSL_aECDSA; 409#endif 410#ifdef OPENSSL_NO_PSK 411 disabled_mkey_mask |= SSL_PSK; 412 disabled_auth_mask |= SSL_aPSK; 413#endif 414#ifdef OPENSSL_NO_SRP 415 disabled_mkey_mask |= SSL_kSRP; 416#endif 417 418 /* 419 * Check for presence of GOST 34.10 algorithms, and if they are not 420 * present, disable appropriate auth and key exchange 421 */ 422 ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX] = get_optional_pkey_id("gost-mac"); 423 if (ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX]) 424 ssl_mac_secret_size[SSL_MD_GOST89MAC_IDX] = 32; 425 else 426 disabled_mac_mask |= SSL_GOST89MAC; 427 428 ssl_mac_pkey_id[SSL_MD_GOST89MAC12_IDX] = 429 get_optional_pkey_id("gost-mac-12"); 430 if (ssl_mac_pkey_id[SSL_MD_GOST89MAC12_IDX]) 431 ssl_mac_secret_size[SSL_MD_GOST89MAC12_IDX] = 32; 432 else 433 disabled_mac_mask |= SSL_GOST89MAC12; 434 435 if (!get_optional_pkey_id("gost2001")) 436 disabled_auth_mask |= SSL_aGOST01 | SSL_aGOST12; 437 if (!get_optional_pkey_id("gost2012_256")) 438 disabled_auth_mask |= SSL_aGOST12; 439 if (!get_optional_pkey_id("gost2012_512")) 440 disabled_auth_mask |= SSL_aGOST12; 441 /* 442 * Disable GOST key exchange if no GOST signature algs are available * 443 */ 444 if ((disabled_auth_mask & (SSL_aGOST01 | SSL_aGOST12)) == 445 (SSL_aGOST01 | SSL_aGOST12)) 446 disabled_mkey_mask |= SSL_kGOST; 447 448 return 1; 449} 450 451#ifndef OPENSSL_NO_COMP 452 453static int sk_comp_cmp(const SSL_COMP *const *a, const SSL_COMP *const *b) 454{ 455 return ((*a)->id - (*b)->id); 456} 457 458DEFINE_RUN_ONCE_STATIC(do_load_builtin_compressions) 459{ 460 SSL_COMP *comp = NULL; 461 COMP_METHOD *method = COMP_zlib(); 462 463 CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_DISABLE); 464 ssl_comp_methods = sk_SSL_COMP_new(sk_comp_cmp); 465 466 if (COMP_get_type(method) != NID_undef && ssl_comp_methods != NULL) { 467 comp = OPENSSL_malloc(sizeof(*comp)); 468 if (comp != NULL) { 469 comp->method = method; 470 comp->id = SSL_COMP_ZLIB_IDX; 471 comp->name = COMP_get_name(method); 472 sk_SSL_COMP_push(ssl_comp_methods, comp); 473 sk_SSL_COMP_sort(ssl_comp_methods); 474 } 475 } 476 CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ENABLE); 477 return 1; 478} 479 480static int load_builtin_compressions(void) 481{ 482 return RUN_ONCE(&ssl_load_builtin_comp_once, do_load_builtin_compressions); 483} 484#endif 485 486int ssl_cipher_get_evp(const SSL_SESSION *s, const EVP_CIPHER **enc, 487 const EVP_MD **md, int *mac_pkey_type, 488 size_t *mac_secret_size, SSL_COMP **comp, int use_etm) 489{ 490 int i; 491 const SSL_CIPHER *c; 492 493 c = s->cipher; 494 if (c == NULL) 495 return 0; 496 if (comp != NULL) { 497 SSL_COMP ctmp; 498#ifndef OPENSSL_NO_COMP 499 if (!load_builtin_compressions()) { 500 /* 501 * Currently don't care, since a failure only means that 502 * ssl_comp_methods is NULL, which is perfectly OK 503 */ 504 } 505#endif 506 *comp = NULL; 507 ctmp.id = s->compress_meth; 508 if (ssl_comp_methods != NULL) { 509 i = sk_SSL_COMP_find(ssl_comp_methods, &ctmp); 510 *comp = sk_SSL_COMP_value(ssl_comp_methods, i); 511 } 512 /* If were only interested in comp then return success */ 513 if ((enc == NULL) && (md == NULL)) 514 return 1; 515 } 516 517 if ((enc == NULL) || (md == NULL)) 518 return 0; 519 520 i = ssl_cipher_info_lookup(ssl_cipher_table_cipher, c->algorithm_enc); 521 522 if (i == -1) { 523 *enc = NULL; 524 } else { 525 if (i == SSL_ENC_NULL_IDX) 526 *enc = EVP_enc_null(); 527 else 528 *enc = ssl_cipher_methods[i]; 529 } 530 531 i = ssl_cipher_info_lookup(ssl_cipher_table_mac, c->algorithm_mac); 532 if (i == -1) { 533 *md = NULL; 534 if (mac_pkey_type != NULL) 535 *mac_pkey_type = NID_undef; 536 if (mac_secret_size != NULL) 537 *mac_secret_size = 0; 538 if (c->algorithm_mac == SSL_AEAD) 539 mac_pkey_type = NULL; 540 } else { 541 *md = ssl_digest_methods[i]; 542 if (mac_pkey_type != NULL) 543 *mac_pkey_type = ssl_mac_pkey_id[i]; 544 if (mac_secret_size != NULL) 545 *mac_secret_size = ssl_mac_secret_size[i]; 546 } 547 548 if ((*enc != NULL) && 549 (*md != NULL || (EVP_CIPHER_flags(*enc) & EVP_CIPH_FLAG_AEAD_CIPHER)) 550 && (!mac_pkey_type || *mac_pkey_type != NID_undef)) { 551 const EVP_CIPHER *evp; 552 553 if (use_etm) 554 return 1; 555 556 if (s->ssl_version >> 8 != TLS1_VERSION_MAJOR || 557 s->ssl_version < TLS1_VERSION) 558 return 1; 559 560 if (c->algorithm_enc == SSL_RC4 && 561 c->algorithm_mac == SSL_MD5 && 562 (evp = EVP_get_cipherbyname("RC4-HMAC-MD5"))) 563 *enc = evp, *md = NULL; 564 else if (c->algorithm_enc == SSL_AES128 && 565 c->algorithm_mac == SSL_SHA1 && 566 (evp = EVP_get_cipherbyname("AES-128-CBC-HMAC-SHA1"))) 567 *enc = evp, *md = NULL; 568 else if (c->algorithm_enc == SSL_AES256 && 569 c->algorithm_mac == SSL_SHA1 && 570 (evp = EVP_get_cipherbyname("AES-256-CBC-HMAC-SHA1"))) 571 *enc = evp, *md = NULL; 572 else if (c->algorithm_enc == SSL_AES128 && 573 c->algorithm_mac == SSL_SHA256 && 574 (evp = EVP_get_cipherbyname("AES-128-CBC-HMAC-SHA256"))) 575 *enc = evp, *md = NULL; 576 else if (c->algorithm_enc == SSL_AES256 && 577 c->algorithm_mac == SSL_SHA256 && 578 (evp = EVP_get_cipherbyname("AES-256-CBC-HMAC-SHA256"))) 579 *enc = evp, *md = NULL; 580 return 1; 581 } else { 582 return 0; 583 } 584} 585 586const EVP_MD *ssl_md(int idx) 587{ 588 idx &= SSL_HANDSHAKE_MAC_MASK; 589 if (idx < 0 || idx >= SSL_MD_NUM_IDX) 590 return NULL; 591 return ssl_digest_methods[idx]; 592} 593 594const EVP_MD *ssl_handshake_md(SSL *s) 595{ 596 return ssl_md(ssl_get_algorithm2(s)); 597} 598 599const EVP_MD *ssl_prf_md(SSL *s) 600{ 601 return ssl_md(ssl_get_algorithm2(s) >> TLS1_PRF_DGST_SHIFT); 602} 603 604#define ITEM_SEP(a) \ 605 (((a) == ':') || ((a) == ' ') || ((a) == ';') || ((a) == ',')) 606 607static void ll_append_tail(CIPHER_ORDER **head, CIPHER_ORDER *curr, 608 CIPHER_ORDER **tail) 609{ 610 if (curr == *tail) 611 return; 612 if (curr == *head) 613 *head = curr->next; 614 if (curr->prev != NULL) 615 curr->prev->next = curr->next; 616 if (curr->next != NULL) 617 curr->next->prev = curr->prev; 618 (*tail)->next = curr; 619 curr->prev = *tail; 620 curr->next = NULL; 621 *tail = curr; 622} 623 624static void ll_append_head(CIPHER_ORDER **head, CIPHER_ORDER *curr, 625 CIPHER_ORDER **tail) 626{ 627 if (curr == *head) 628 return; 629 if (curr == *tail) 630 *tail = curr->prev; 631 if (curr->next != NULL) 632 curr->next->prev = curr->prev; 633 if (curr->prev != NULL) 634 curr->prev->next = curr->next; 635 (*head)->prev = curr; 636 curr->next = *head; 637 curr->prev = NULL; 638 *head = curr; 639} 640 641static void ssl_cipher_collect_ciphers(const SSL_METHOD *ssl_method, 642 int num_of_ciphers, 643 uint32_t disabled_mkey, 644 uint32_t disabled_auth, 645 uint32_t disabled_enc, 646 uint32_t disabled_mac, 647 CIPHER_ORDER *co_list, 648 CIPHER_ORDER **head_p, 649 CIPHER_ORDER **tail_p) 650{ 651 int i, co_list_num; 652 const SSL_CIPHER *c; 653 654 /* 655 * We have num_of_ciphers descriptions compiled in, depending on the 656 * method selected (SSLv3, TLSv1 etc). 657 * These will later be sorted in a linked list with at most num 658 * entries. 659 */ 660 661 /* Get the initial list of ciphers */ 662 co_list_num = 0; /* actual count of ciphers */ 663 for (i = 0; i < num_of_ciphers; i++) { 664 c = ssl_method->get_cipher(i); 665 /* drop those that use any of that is not available */ 666 if (c == NULL || !c->valid) 667 continue; 668 if ((c->algorithm_mkey & disabled_mkey) || 669 (c->algorithm_auth & disabled_auth) || 670 (c->algorithm_enc & disabled_enc) || 671 (c->algorithm_mac & disabled_mac)) 672 continue; 673 if (((ssl_method->ssl3_enc->enc_flags & SSL_ENC_FLAG_DTLS) == 0) && 674 c->min_tls == 0) 675 continue; 676 if (((ssl_method->ssl3_enc->enc_flags & SSL_ENC_FLAG_DTLS) != 0) && 677 c->min_dtls == 0) 678 continue; 679 680 co_list[co_list_num].cipher = c; 681 co_list[co_list_num].next = NULL; 682 co_list[co_list_num].prev = NULL; 683 co_list[co_list_num].active = 0; 684 co_list_num++; 685 } 686 687 /* 688 * Prepare linked list from list entries 689 */ 690 if (co_list_num > 0) { 691 co_list[0].prev = NULL; 692 693 if (co_list_num > 1) { 694 co_list[0].next = &co_list[1]; 695 696 for (i = 1; i < co_list_num - 1; i++) { 697 co_list[i].prev = &co_list[i - 1]; 698 co_list[i].next = &co_list[i + 1]; 699 } 700 701 co_list[co_list_num - 1].prev = &co_list[co_list_num - 2]; 702 } 703 704 co_list[co_list_num - 1].next = NULL; 705 706 *head_p = &co_list[0]; 707 *tail_p = &co_list[co_list_num - 1]; 708 } 709} 710 711static void ssl_cipher_collect_aliases(const SSL_CIPHER **ca_list, 712 int num_of_group_aliases, 713 uint32_t disabled_mkey, 714 uint32_t disabled_auth, 715 uint32_t disabled_enc, 716 uint32_t disabled_mac, 717 CIPHER_ORDER *head) 718{ 719 CIPHER_ORDER *ciph_curr; 720 const SSL_CIPHER **ca_curr; 721 int i; 722 uint32_t mask_mkey = ~disabled_mkey; 723 uint32_t mask_auth = ~disabled_auth; 724 uint32_t mask_enc = ~disabled_enc; 725 uint32_t mask_mac = ~disabled_mac; 726 727 /* 728 * First, add the real ciphers as already collected 729 */ 730 ciph_curr = head; 731 ca_curr = ca_list; 732 while (ciph_curr != NULL) { 733 *ca_curr = ciph_curr->cipher; 734 ca_curr++; 735 ciph_curr = ciph_curr->next; 736 } 737 738 /* 739 * Now we add the available ones from the cipher_aliases[] table. 740 * They represent either one or more algorithms, some of which 741 * in any affected category must be supported (set in enabled_mask), 742 * or represent a cipher strength value (will be added in any case because algorithms=0). 743 */ 744 for (i = 0; i < num_of_group_aliases; i++) { 745 uint32_t algorithm_mkey = cipher_aliases[i].algorithm_mkey; 746 uint32_t algorithm_auth = cipher_aliases[i].algorithm_auth; 747 uint32_t algorithm_enc = cipher_aliases[i].algorithm_enc; 748 uint32_t algorithm_mac = cipher_aliases[i].algorithm_mac; 749 750 if (algorithm_mkey) 751 if ((algorithm_mkey & mask_mkey) == 0) 752 continue; 753 754 if (algorithm_auth) 755 if ((algorithm_auth & mask_auth) == 0) 756 continue; 757 758 if (algorithm_enc) 759 if ((algorithm_enc & mask_enc) == 0) 760 continue; 761 762 if (algorithm_mac) 763 if ((algorithm_mac & mask_mac) == 0) 764 continue; 765 766 *ca_curr = (SSL_CIPHER *)(cipher_aliases + i); 767 ca_curr++; 768 } 769 770 *ca_curr = NULL; /* end of list */ 771} 772 773static void ssl_cipher_apply_rule(uint32_t cipher_id, uint32_t alg_mkey, 774 uint32_t alg_auth, uint32_t alg_enc, 775 uint32_t alg_mac, int min_tls, 776 uint32_t algo_strength, int rule, 777 int32_t strength_bits, CIPHER_ORDER **head_p, 778 CIPHER_ORDER **tail_p) 779{ 780 CIPHER_ORDER *head, *tail, *curr, *next, *last; 781 const SSL_CIPHER *cp; 782 int reverse = 0; 783 784#ifdef CIPHER_DEBUG 785 fprintf(stderr, 786 "Applying rule %d with %08x/%08x/%08x/%08x/%08x %08x (%d)\n", 787 rule, alg_mkey, alg_auth, alg_enc, alg_mac, min_tls, 788 algo_strength, strength_bits); 789#endif 790 791 if (rule == CIPHER_DEL || rule == CIPHER_BUMP) 792 reverse = 1; /* needed to maintain sorting between currently 793 * deleted ciphers */ 794 795 head = *head_p; 796 tail = *tail_p; 797 798 if (reverse) { 799 next = tail; 800 last = head; 801 } else { 802 next = head; 803 last = tail; 804 } 805 806 curr = NULL; 807 for (;;) { 808 if (curr == last) 809 break; 810 811 curr = next; 812 813 if (curr == NULL) 814 break; 815 816 next = reverse ? curr->prev : curr->next; 817 818 cp = curr->cipher; 819 820 /* 821 * Selection criteria is either the value of strength_bits 822 * or the algorithms used. 823 */ 824 if (strength_bits >= 0) { 825 if (strength_bits != cp->strength_bits) 826 continue; 827 } else { 828#ifdef CIPHER_DEBUG 829 fprintf(stderr, 830 "\nName: %s:\nAlgo = %08x/%08x/%08x/%08x/%08x Algo_strength = %08x\n", 831 cp->name, cp->algorithm_mkey, cp->algorithm_auth, 832 cp->algorithm_enc, cp->algorithm_mac, cp->min_tls, 833 cp->algo_strength); 834#endif 835 if (cipher_id != 0 && (cipher_id != cp->id)) 836 continue; 837 if (alg_mkey && !(alg_mkey & cp->algorithm_mkey)) 838 continue; 839 if (alg_auth && !(alg_auth & cp->algorithm_auth)) 840 continue; 841 if (alg_enc && !(alg_enc & cp->algorithm_enc)) 842 continue; 843 if (alg_mac && !(alg_mac & cp->algorithm_mac)) 844 continue; 845 if (min_tls && (min_tls != cp->min_tls)) 846 continue; 847 if ((algo_strength & SSL_STRONG_MASK) 848 && !(algo_strength & SSL_STRONG_MASK & cp->algo_strength)) 849 continue; 850 if ((algo_strength & SSL_DEFAULT_MASK) 851 && !(algo_strength & SSL_DEFAULT_MASK & cp->algo_strength)) 852 continue; 853 } 854 855#ifdef CIPHER_DEBUG 856 fprintf(stderr, "Action = %d\n", rule); 857#endif 858 859 /* add the cipher if it has not been added yet. */ 860 if (rule == CIPHER_ADD) { 861 /* reverse == 0 */ 862 if (!curr->active) { 863 ll_append_tail(&head, curr, &tail); 864 curr->active = 1; 865 } 866 } 867 /* Move the added cipher to this location */ 868 else if (rule == CIPHER_ORD) { 869 /* reverse == 0 */ 870 if (curr->active) { 871 ll_append_tail(&head, curr, &tail); 872 } 873 } else if (rule == CIPHER_DEL) { 874 /* reverse == 1 */ 875 if (curr->active) { 876 /* 877 * most recently deleted ciphersuites get best positions for 878 * any future CIPHER_ADD (note that the CIPHER_DEL loop works 879 * in reverse to maintain the order) 880 */ 881 ll_append_head(&head, curr, &tail); 882 curr->active = 0; 883 } 884 } else if (rule == CIPHER_BUMP) { 885 if (curr->active) 886 ll_append_head(&head, curr, &tail); 887 } else if (rule == CIPHER_KILL) { 888 /* reverse == 0 */ 889 if (head == curr) 890 head = curr->next; 891 else 892 curr->prev->next = curr->next; 893 if (tail == curr) 894 tail = curr->prev; 895 curr->active = 0; 896 if (curr->next != NULL) 897 curr->next->prev = curr->prev; 898 if (curr->prev != NULL) 899 curr->prev->next = curr->next; 900 curr->next = NULL; 901 curr->prev = NULL; 902 } 903 } 904 905 *head_p = head; 906 *tail_p = tail; 907} 908 909static int ssl_cipher_strength_sort(CIPHER_ORDER **head_p, 910 CIPHER_ORDER **tail_p) 911{ 912 int32_t max_strength_bits; 913 int i, *number_uses; 914 CIPHER_ORDER *curr; 915 916 /* 917 * This routine sorts the ciphers with descending strength. The sorting 918 * must keep the pre-sorted sequence, so we apply the normal sorting 919 * routine as '+' movement to the end of the list. 920 */ 921 max_strength_bits = 0; 922 curr = *head_p; 923 while (curr != NULL) { 924 if (curr->active && (curr->cipher->strength_bits > max_strength_bits)) 925 max_strength_bits = curr->cipher->strength_bits; 926 curr = curr->next; 927 } 928 929 number_uses = OPENSSL_zalloc(sizeof(int) * (max_strength_bits + 1)); 930 if (number_uses == NULL) { 931 SSLerr(SSL_F_SSL_CIPHER_STRENGTH_SORT, ERR_R_MALLOC_FAILURE); 932 return 0; 933 } 934 935 /* 936 * Now find the strength_bits values actually used 937 */ 938 curr = *head_p; 939 while (curr != NULL) { 940 if (curr->active) 941 number_uses[curr->cipher->strength_bits]++; 942 curr = curr->next; 943 } 944 /* 945 * Go through the list of used strength_bits values in descending 946 * order. 947 */ 948 for (i = max_strength_bits; i >= 0; i--) 949 if (number_uses[i] > 0) 950 ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_ORD, i, head_p, 951 tail_p); 952 953 OPENSSL_free(number_uses); 954 return 1; 955} 956 957static int ssl_cipher_process_rulestr(const char *rule_str, 958 CIPHER_ORDER **head_p, 959 CIPHER_ORDER **tail_p, 960 const SSL_CIPHER **ca_list, CERT *c) 961{ 962 uint32_t alg_mkey, alg_auth, alg_enc, alg_mac, algo_strength; 963 int min_tls; 964 const char *l, *buf; 965 int j, multi, found, rule, retval, ok, buflen; 966 uint32_t cipher_id = 0; 967 char ch; 968 969 retval = 1; 970 l = rule_str; 971 for ( ; ; ) { 972 ch = *l; 973 974 if (ch == '\0') 975 break; /* done */ 976 if (ch == '-') { 977 rule = CIPHER_DEL; 978 l++; 979 } else if (ch == '+') { 980 rule = CIPHER_ORD; 981 l++; 982 } else if (ch == '!') { 983 rule = CIPHER_KILL; 984 l++; 985 } else if (ch == '@') { 986 rule = CIPHER_SPECIAL; 987 l++; 988 } else { 989 rule = CIPHER_ADD; 990 } 991 992 if (ITEM_SEP(ch)) { 993 l++; 994 continue; 995 } 996 997 alg_mkey = 0; 998 alg_auth = 0; 999 alg_enc = 0; 1000 alg_mac = 0; 1001 min_tls = 0; 1002 algo_strength = 0; 1003 1004 for (;;) { 1005 ch = *l; 1006 buf = l; 1007 buflen = 0; 1008#ifndef CHARSET_EBCDIC 1009 while (((ch >= 'A') && (ch <= 'Z')) || 1010 ((ch >= '0') && (ch <= '9')) || 1011 ((ch >= 'a') && (ch <= 'z')) || 1012 (ch == '-') || (ch == '.') || (ch == '=')) 1013#else 1014 while (isalnum((unsigned char)ch) || (ch == '-') || (ch == '.') 1015 || (ch == '=')) 1016#endif 1017 { 1018 ch = *(++l); 1019 buflen++; 1020 } 1021 1022 if (buflen == 0) { 1023 /* 1024 * We hit something we cannot deal with, 1025 * it is no command or separator nor 1026 * alphanumeric, so we call this an error. 1027 */ 1028 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR, SSL_R_INVALID_COMMAND); 1029 return 0; 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 1220static 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 1275static 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 1304static __owur 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 1323static 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 1341static 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 1374int 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 return update_cipher_list(&ctx->cipher_list, &ctx->cipher_list_by_id, 1380 ctx->tls13_ciphersuites); 1381 1382 return ret; 1383} 1384 1385int SSL_set_ciphersuites(SSL *s, const char *str) 1386{ 1387 STACK_OF(SSL_CIPHER) *cipher_list; 1388 int ret = set_ciphersuites(&(s->tls13_ciphersuites), str); 1389 1390 if (s->cipher_list == NULL) { 1391 if ((cipher_list = SSL_get_ciphers(s)) != NULL) 1392 s->cipher_list = sk_SSL_CIPHER_dup(cipher_list); 1393 } 1394 if (ret && s->cipher_list != NULL) 1395 return update_cipher_list(&s->cipher_list, &s->cipher_list_by_id, 1396 s->tls13_ciphersuites); 1397 1398 return ret; 1399} 1400 1401STACK_OF(SSL_CIPHER) *ssl_create_cipher_list(const SSL_METHOD *ssl_method, 1402 STACK_OF(SSL_CIPHER) *tls13_ciphersuites, 1403 STACK_OF(SSL_CIPHER) **cipher_list, 1404 STACK_OF(SSL_CIPHER) **cipher_list_by_id, 1405 const char *rule_str, 1406 CERT *c) 1407{ 1408 int ok, num_of_ciphers, num_of_alias_max, num_of_group_aliases, i; 1409 uint32_t disabled_mkey, disabled_auth, disabled_enc, disabled_mac; 1410 STACK_OF(SSL_CIPHER) *cipherstack; 1411 const char *rule_p; 1412 CIPHER_ORDER *co_list = NULL, *head = NULL, *tail = NULL, *curr; 1413 const SSL_CIPHER **ca_list = NULL; 1414 1415 /* 1416 * Return with error if nothing to do. 1417 */ 1418 if (rule_str == NULL || cipher_list == NULL || cipher_list_by_id == NULL) 1419 return NULL; 1420#ifndef OPENSSL_NO_EC 1421 if (!check_suiteb_cipher_list(ssl_method, c, &rule_str)) 1422 return NULL; 1423#endif 1424 1425 /* 1426 * To reduce the work to do we only want to process the compiled 1427 * in algorithms, so we first get the mask of disabled ciphers. 1428 */ 1429 1430 disabled_mkey = disabled_mkey_mask; 1431 disabled_auth = disabled_auth_mask; 1432 disabled_enc = disabled_enc_mask; 1433 disabled_mac = disabled_mac_mask; 1434 1435 /* 1436 * Now we have to collect the available ciphers from the compiled 1437 * in ciphers. We cannot get more than the number compiled in, so 1438 * it is used for allocation. 1439 */ 1440 num_of_ciphers = ssl_method->num_ciphers(); 1441 1442 co_list = OPENSSL_malloc(sizeof(*co_list) * num_of_ciphers); 1443 if (co_list == NULL) { 1444 SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST, ERR_R_MALLOC_FAILURE); 1445 return NULL; /* Failure */ 1446 } 1447 1448 ssl_cipher_collect_ciphers(ssl_method, num_of_ciphers, 1449 disabled_mkey, disabled_auth, disabled_enc, 1450 disabled_mac, co_list, &head, &tail); 1451 1452 /* Now arrange all ciphers by preference. */ 1453 1454 /* 1455 * Everything else being equal, prefer ephemeral ECDH over other key 1456 * exchange mechanisms. 1457 * For consistency, prefer ECDSA over RSA (though this only matters if the 1458 * server has both certificates, and is using the DEFAULT, or a client 1459 * preference). 1460 */ 1461 ssl_cipher_apply_rule(0, SSL_kECDHE, SSL_aECDSA, 0, 0, 0, 0, CIPHER_ADD, 1462 -1, &head, &tail); 1463 ssl_cipher_apply_rule(0, SSL_kECDHE, 0, 0, 0, 0, 0, CIPHER_ADD, -1, &head, 1464 &tail); 1465 ssl_cipher_apply_rule(0, SSL_kECDHE, 0, 0, 0, 0, 0, CIPHER_DEL, -1, &head, 1466 &tail); 1467 1468 /* Within each strength group, we prefer GCM over CHACHA... */ 1469 ssl_cipher_apply_rule(0, 0, 0, SSL_AESGCM, 0, 0, 0, CIPHER_ADD, -1, 1470 &head, &tail); 1471 ssl_cipher_apply_rule(0, 0, 0, SSL_CHACHA20, 0, 0, 0, CIPHER_ADD, -1, 1472 &head, &tail); 1473 1474 /* 1475 * ...and generally, our preferred cipher is AES. 1476 * Note that AEADs will be bumped to take preference after sorting by 1477 * strength. 1478 */ 1479 ssl_cipher_apply_rule(0, 0, 0, SSL_AES ^ SSL_AESGCM, 0, 0, 0, CIPHER_ADD, 1480 -1, &head, &tail); 1481 1482 /* Temporarily enable everything else for sorting */ 1483 ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_ADD, -1, &head, &tail); 1484 1485 /* Low priority for MD5 */ 1486 ssl_cipher_apply_rule(0, 0, 0, 0, SSL_MD5, 0, 0, CIPHER_ORD, -1, &head, 1487 &tail); 1488 1489 /* 1490 * Move anonymous ciphers to the end. Usually, these will remain 1491 * disabled. (For applications that allow them, they aren't too bad, but 1492 * we prefer authenticated ciphers.) 1493 */ 1494 ssl_cipher_apply_rule(0, 0, SSL_aNULL, 0, 0, 0, 0, CIPHER_ORD, -1, &head, 1495 &tail); 1496 1497 ssl_cipher_apply_rule(0, SSL_kRSA, 0, 0, 0, 0, 0, CIPHER_ORD, -1, &head, 1498 &tail); 1499 ssl_cipher_apply_rule(0, SSL_kPSK, 0, 0, 0, 0, 0, CIPHER_ORD, -1, &head, 1500 &tail); 1501 1502 /* RC4 is sort-of broken -- move to the end */ 1503 ssl_cipher_apply_rule(0, 0, 0, SSL_RC4, 0, 0, 0, CIPHER_ORD, -1, &head, 1504 &tail); 1505 1506 /* 1507 * Now sort by symmetric encryption strength. The above ordering remains 1508 * in force within each class 1509 */ 1510 if (!ssl_cipher_strength_sort(&head, &tail)) { 1511 OPENSSL_free(co_list); 1512 return NULL; 1513 } 1514 1515 /* 1516 * Partially overrule strength sort to prefer TLS 1.2 ciphers/PRFs. 1517 * TODO(openssl-team): is there an easier way to accomplish all this? 1518 */ 1519 ssl_cipher_apply_rule(0, 0, 0, 0, 0, TLS1_2_VERSION, 0, CIPHER_BUMP, -1, 1520 &head, &tail); 1521 1522 /* 1523 * Irrespective of strength, enforce the following order: 1524 * (EC)DHE + AEAD > (EC)DHE > rest of AEAD > rest. 1525 * Within each group, ciphers remain sorted by strength and previous 1526 * preference, i.e., 1527 * 1) ECDHE > DHE 1528 * 2) GCM > CHACHA 1529 * 3) AES > rest 1530 * 4) TLS 1.2 > legacy 1531 * 1532 * Because we now bump ciphers to the top of the list, we proceed in 1533 * reverse order of preference. 1534 */ 1535 ssl_cipher_apply_rule(0, 0, 0, 0, SSL_AEAD, 0, 0, CIPHER_BUMP, -1, 1536 &head, &tail); 1537 ssl_cipher_apply_rule(0, SSL_kDHE | SSL_kECDHE, 0, 0, 0, 0, 0, 1538 CIPHER_BUMP, -1, &head, &tail); 1539 ssl_cipher_apply_rule(0, SSL_kDHE | SSL_kECDHE, 0, 0, SSL_AEAD, 0, 0, 1540 CIPHER_BUMP, -1, &head, &tail); 1541 1542 /* Now disable everything (maintaining the ordering!) */ 1543 ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_DEL, -1, &head, &tail); 1544 1545 /* 1546 * We also need cipher aliases for selecting based on the rule_str. 1547 * There might be two types of entries in the rule_str: 1) names 1548 * of ciphers themselves 2) aliases for groups of ciphers. 1549 * For 1) we need the available ciphers and for 2) the cipher 1550 * groups of cipher_aliases added together in one list (otherwise 1551 * we would be happy with just the cipher_aliases table). 1552 */ 1553 num_of_group_aliases = OSSL_NELEM(cipher_aliases); 1554 num_of_alias_max = num_of_ciphers + num_of_group_aliases + 1; 1555 ca_list = OPENSSL_malloc(sizeof(*ca_list) * num_of_alias_max); 1556 if (ca_list == NULL) { 1557 OPENSSL_free(co_list); 1558 SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST, ERR_R_MALLOC_FAILURE); 1559 return NULL; /* Failure */ 1560 } 1561 ssl_cipher_collect_aliases(ca_list, num_of_group_aliases, 1562 disabled_mkey, disabled_auth, disabled_enc, 1563 disabled_mac, head); 1564 1565 /* 1566 * If the rule_string begins with DEFAULT, apply the default rule 1567 * before using the (possibly available) additional rules. 1568 */ 1569 ok = 1; 1570 rule_p = rule_str; 1571 if (strncmp(rule_str, "DEFAULT", 7) == 0) { 1572 ok = ssl_cipher_process_rulestr(SSL_DEFAULT_CIPHER_LIST, 1573 &head, &tail, ca_list, c); 1574 rule_p += 7; 1575 if (*rule_p == ':') 1576 rule_p++; 1577 } 1578 1579 if (ok && (strlen(rule_p) > 0)) 1580 ok = ssl_cipher_process_rulestr(rule_p, &head, &tail, ca_list, c); 1581 1582 OPENSSL_free(ca_list); /* Not needed anymore */ 1583 1584 if (!ok) { /* Rule processing failure */ 1585 OPENSSL_free(co_list); 1586 return NULL; 1587 } 1588 1589 /* 1590 * Allocate new "cipherstack" for the result, return with error 1591 * if we cannot get one. 1592 */ 1593 if ((cipherstack = sk_SSL_CIPHER_new_null()) == NULL) { 1594 OPENSSL_free(co_list); 1595 return NULL; 1596 } 1597 1598 /* Add TLSv1.3 ciphers first - we always prefer those if possible */ 1599 for (i = 0; i < sk_SSL_CIPHER_num(tls13_ciphersuites); i++) { 1600 if (!sk_SSL_CIPHER_push(cipherstack, 1601 sk_SSL_CIPHER_value(tls13_ciphersuites, i))) { 1602 OPENSSL_free(co_list); 1603 sk_SSL_CIPHER_free(cipherstack); 1604 return NULL; 1605 } 1606 } 1607 1608 /* 1609 * The cipher selection for the list is done. The ciphers are added 1610 * to the resulting precedence to the STACK_OF(SSL_CIPHER). 1611 */ 1612 for (curr = head; curr != NULL; curr = curr->next) { 1613 if (curr->active) { 1614 if (!sk_SSL_CIPHER_push(cipherstack, curr->cipher)) { 1615 OPENSSL_free(co_list); 1616 sk_SSL_CIPHER_free(cipherstack); 1617 return NULL; 1618 } 1619#ifdef CIPHER_DEBUG 1620 fprintf(stderr, "<%s>\n", curr->cipher->name); 1621#endif 1622 } 1623 } 1624 OPENSSL_free(co_list); /* Not needed any longer */ 1625 1626 if (!update_cipher_list_by_id(cipher_list_by_id, cipherstack)) { 1627 sk_SSL_CIPHER_free(cipherstack); 1628 return NULL; 1629 } 1630 sk_SSL_CIPHER_free(*cipher_list); 1631 *cipher_list = cipherstack; 1632 1633 return cipherstack; 1634} 1635 1636char *SSL_CIPHER_description(const SSL_CIPHER *cipher, char *buf, int len) 1637{ 1638 const char *ver; 1639 const char *kx, *au, *enc, *mac; 1640 uint32_t alg_mkey, alg_auth, alg_enc, alg_mac; 1641 static const char *format = "%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s\n"; 1642 1643 if (buf == NULL) { 1644 len = 128; 1645 if ((buf = OPENSSL_malloc(len)) == NULL) { 1646 SSLerr(SSL_F_SSL_CIPHER_DESCRIPTION, ERR_R_MALLOC_FAILURE); 1647 return NULL; 1648 } 1649 } else if (len < 128) { 1650 return NULL; 1651 } 1652 1653 alg_mkey = cipher->algorithm_mkey; 1654 alg_auth = cipher->algorithm_auth; 1655 alg_enc = cipher->algorithm_enc; 1656 alg_mac = cipher->algorithm_mac; 1657 1658 ver = ssl_protocol_to_string(cipher->min_tls); 1659 1660 switch (alg_mkey) { 1661 case SSL_kRSA: 1662 kx = "RSA"; 1663 break; 1664 case SSL_kDHE: 1665 kx = "DH"; 1666 break; 1667 case SSL_kECDHE: 1668 kx = "ECDH"; 1669 break; 1670 case SSL_kPSK: 1671 kx = "PSK"; 1672 break; 1673 case SSL_kRSAPSK: 1674 kx = "RSAPSK"; 1675 break; 1676 case SSL_kECDHEPSK: 1677 kx = "ECDHEPSK"; 1678 break; 1679 case SSL_kDHEPSK: 1680 kx = "DHEPSK"; 1681 break; 1682 case SSL_kSRP: 1683 kx = "SRP"; 1684 break; 1685 case SSL_kGOST: 1686 kx = "GOST"; 1687 break; 1688 case SSL_kANY: 1689 kx = "any"; 1690 break; 1691 default: 1692 kx = "unknown"; 1693 } 1694 1695 switch (alg_auth) { 1696 case SSL_aRSA: 1697 au = "RSA"; 1698 break; 1699 case SSL_aDSS: 1700 au = "DSS"; 1701 break; 1702 case SSL_aNULL: 1703 au = "None"; 1704 break; 1705 case SSL_aECDSA: 1706 au = "ECDSA"; 1707 break; 1708 case SSL_aPSK: 1709 au = "PSK"; 1710 break; 1711 case SSL_aSRP: 1712 au = "SRP"; 1713 break; 1714 case SSL_aGOST01: 1715 au = "GOST01"; 1716 break; 1717 /* New GOST ciphersuites have both SSL_aGOST12 and SSL_aGOST01 bits */ 1718 case (SSL_aGOST12 | SSL_aGOST01): 1719 au = "GOST12"; 1720 break; 1721 case SSL_aANY: 1722 au = "any"; 1723 break; 1724 default: 1725 au = "unknown"; 1726 break; 1727 } 1728 1729 switch (alg_enc) { 1730 case SSL_DES: 1731 enc = "DES(56)"; 1732 break; 1733 case SSL_3DES: 1734 enc = "3DES(168)"; 1735 break; 1736 case SSL_RC4: 1737 enc = "RC4(128)"; 1738 break; 1739 case SSL_RC2: 1740 enc = "RC2(128)"; 1741 break; 1742 case SSL_IDEA: 1743 enc = "IDEA(128)"; 1744 break; 1745 case SSL_eNULL: 1746 enc = "None"; 1747 break; 1748 case SSL_AES128: 1749 enc = "AES(128)"; 1750 break; 1751 case SSL_AES256: 1752 enc = "AES(256)"; 1753 break; 1754 case SSL_AES128GCM: 1755 enc = "AESGCM(128)"; 1756 break; 1757 case SSL_AES256GCM: 1758 enc = "AESGCM(256)"; 1759 break; 1760 case SSL_AES128CCM: 1761 enc = "AESCCM(128)"; 1762 break; 1763 case SSL_AES256CCM: 1764 enc = "AESCCM(256)"; 1765 break; 1766 case SSL_AES128CCM8: 1767 enc = "AESCCM8(128)"; 1768 break; 1769 case SSL_AES256CCM8: 1770 enc = "AESCCM8(256)"; 1771 break; 1772 case SSL_CAMELLIA128: 1773 enc = "Camellia(128)"; 1774 break; 1775 case SSL_CAMELLIA256: 1776 enc = "Camellia(256)"; 1777 break; 1778 case SSL_ARIA128GCM: 1779 enc = "ARIAGCM(128)"; 1780 break; 1781 case SSL_ARIA256GCM: 1782 enc = "ARIAGCM(256)"; 1783 break; 1784 case SSL_SEED: 1785 enc = "SEED(128)"; 1786 break; 1787 case SSL_eGOST2814789CNT: 1788 case SSL_eGOST2814789CNT12: 1789 enc = "GOST89(256)"; 1790 break; 1791 case SSL_CHACHA20POLY1305: 1792 enc = "CHACHA20/POLY1305(256)"; 1793 break; 1794 default: 1795 enc = "unknown"; 1796 break; 1797 } 1798 1799 switch (alg_mac) { 1800 case SSL_MD5: 1801 mac = "MD5"; 1802 break; 1803 case SSL_SHA1: 1804 mac = "SHA1"; 1805 break; 1806 case SSL_SHA256: 1807 mac = "SHA256"; 1808 break; 1809 case SSL_SHA384: 1810 mac = "SHA384"; 1811 break; 1812 case SSL_AEAD: 1813 mac = "AEAD"; 1814 break; 1815 case SSL_GOST89MAC: 1816 case SSL_GOST89MAC12: 1817 mac = "GOST89"; 1818 break; 1819 case SSL_GOST94: 1820 mac = "GOST94"; 1821 break; 1822 case SSL_GOST12_256: 1823 case SSL_GOST12_512: 1824 mac = "GOST2012"; 1825 break; 1826 default: 1827 mac = "unknown"; 1828 break; 1829 } 1830 1831 BIO_snprintf(buf, len, format, cipher->name, ver, kx, au, enc, mac); 1832 1833 return buf; 1834} 1835 1836const char *SSL_CIPHER_get_version(const SSL_CIPHER *c) 1837{ 1838 if (c == NULL) 1839 return "(NONE)"; 1840 1841 /* 1842 * Backwards-compatibility crutch. In almost all contexts we report TLS 1843 * 1.0 as "TLSv1", but for ciphers we report "TLSv1.0". 1844 */ 1845 if (c->min_tls == TLS1_VERSION) 1846 return "TLSv1.0"; 1847 return ssl_protocol_to_string(c->min_tls); 1848} 1849 1850/* return the actual cipher being used */ 1851const char *SSL_CIPHER_get_name(const SSL_CIPHER *c) 1852{ 1853 if (c != NULL) 1854 return c->name; 1855 return "(NONE)"; 1856} 1857 1858/* return the actual cipher being used in RFC standard name */ 1859const char *SSL_CIPHER_standard_name(const SSL_CIPHER *c) 1860{ 1861 if (c != NULL) 1862 return c->stdname; 1863 return "(NONE)"; 1864} 1865 1866/* return the OpenSSL name based on given RFC standard name */ 1867const char *OPENSSL_cipher_name(const char *stdname) 1868{ 1869 const SSL_CIPHER *c; 1870 1871 if (stdname == NULL) 1872 return "(NONE)"; 1873 c = ssl3_get_cipher_by_std_name(stdname); 1874 return SSL_CIPHER_get_name(c); 1875} 1876 1877/* number of bits for symmetric cipher */ 1878int SSL_CIPHER_get_bits(const SSL_CIPHER *c, int *alg_bits) 1879{ 1880 int ret = 0; 1881 1882 if (c != NULL) { 1883 if (alg_bits != NULL) 1884 *alg_bits = (int)c->alg_bits; 1885 ret = (int)c->strength_bits; 1886 } 1887 return ret; 1888} 1889 1890uint32_t SSL_CIPHER_get_id(const SSL_CIPHER *c) 1891{ 1892 return c->id; 1893} 1894 1895uint16_t SSL_CIPHER_get_protocol_id(const SSL_CIPHER *c) 1896{ 1897 return c->id & 0xFFFF; 1898} 1899 1900SSL_COMP *ssl3_comp_find(STACK_OF(SSL_COMP) *sk, int n) 1901{ 1902 SSL_COMP *ctmp; 1903 int i, nn; 1904 1905 if ((n == 0) || (sk == NULL)) 1906 return NULL; 1907 nn = sk_SSL_COMP_num(sk); 1908 for (i = 0; i < nn; i++) { 1909 ctmp = sk_SSL_COMP_value(sk, i); 1910 if (ctmp->id == n) 1911 return ctmp; 1912 } 1913 return NULL; 1914} 1915 1916#ifdef OPENSSL_NO_COMP 1917STACK_OF(SSL_COMP) *SSL_COMP_get_compression_methods(void) 1918{ 1919 return NULL; 1920} 1921 1922STACK_OF(SSL_COMP) *SSL_COMP_set0_compression_methods(STACK_OF(SSL_COMP) 1923 *meths) 1924{ 1925 return meths; 1926} 1927 1928int SSL_COMP_add_compression_method(int id, COMP_METHOD *cm) 1929{ 1930 return 1; 1931} 1932 1933#else 1934STACK_OF(SSL_COMP) *SSL_COMP_get_compression_methods(void) 1935{ 1936 load_builtin_compressions(); 1937 return ssl_comp_methods; 1938} 1939 1940STACK_OF(SSL_COMP) *SSL_COMP_set0_compression_methods(STACK_OF(SSL_COMP) 1941 *meths) 1942{ 1943 STACK_OF(SSL_COMP) *old_meths = ssl_comp_methods; 1944 ssl_comp_methods = meths; 1945 return old_meths; 1946} 1947 1948static void cmeth_free(SSL_COMP *cm) 1949{ 1950 OPENSSL_free(cm); 1951} 1952 1953void ssl_comp_free_compression_methods_int(void) 1954{ 1955 STACK_OF(SSL_COMP) *old_meths = ssl_comp_methods; 1956 ssl_comp_methods = NULL; 1957 sk_SSL_COMP_pop_free(old_meths, cmeth_free); 1958} 1959 1960int SSL_COMP_add_compression_method(int id, COMP_METHOD *cm) 1961{ 1962 SSL_COMP *comp; 1963 1964 if (cm == NULL || COMP_get_type(cm) == NID_undef) 1965 return 1; 1966 1967 /*- 1968 * According to draft-ietf-tls-compression-04.txt, the 1969 * compression number ranges should be the following: 1970 * 1971 * 0 to 63: methods defined by the IETF 1972 * 64 to 192: external party methods assigned by IANA 1973 * 193 to 255: reserved for private use 1974 */ 1975 if (id < 193 || id > 255) { 1976 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD, 1977 SSL_R_COMPRESSION_ID_NOT_WITHIN_PRIVATE_RANGE); 1978 return 1; 1979 } 1980 1981 CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_DISABLE); 1982 comp = OPENSSL_malloc(sizeof(*comp)); 1983 if (comp == NULL) { 1984 CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ENABLE); 1985 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD, ERR_R_MALLOC_FAILURE); 1986 return 1; 1987 } 1988 1989 comp->id = id; 1990 comp->method = cm; 1991 load_builtin_compressions(); 1992 if (ssl_comp_methods && sk_SSL_COMP_find(ssl_comp_methods, comp) >= 0) { 1993 OPENSSL_free(comp); 1994 CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ENABLE); 1995 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD, 1996 SSL_R_DUPLICATE_COMPRESSION_ID); 1997 return 1; 1998 } 1999 if (ssl_comp_methods == NULL || !sk_SSL_COMP_push(ssl_comp_methods, comp)) { 2000 OPENSSL_free(comp); 2001 CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ENABLE); 2002 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD, ERR_R_MALLOC_FAILURE); 2003 return 1; 2004 } 2005 CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ENABLE); 2006 return 0; 2007} 2008#endif 2009 2010const char *SSL_COMP_get_name(const COMP_METHOD *comp) 2011{ 2012#ifndef OPENSSL_NO_COMP 2013 return comp ? COMP_get_name(comp) : NULL; 2014#else 2015 return NULL; 2016#endif 2017} 2018 2019const char *SSL_COMP_get0_name(const SSL_COMP *comp) 2020{ 2021#ifndef OPENSSL_NO_COMP 2022 return comp->name; 2023#else 2024 return NULL; 2025#endif 2026} 2027 2028int SSL_COMP_get_id(const SSL_COMP *comp) 2029{ 2030#ifndef OPENSSL_NO_COMP 2031 return comp->id; 2032#else 2033 return -1; 2034#endif 2035} 2036 2037const SSL_CIPHER *ssl_get_cipher_by_char(SSL *ssl, const unsigned char *ptr, 2038 int all) 2039{ 2040 const SSL_CIPHER *c = ssl->method->get_cipher_by_char(ptr); 2041 2042 if (c == NULL || (!all && c->valid == 0)) 2043 return NULL; 2044 return c; 2045} 2046 2047const SSL_CIPHER *SSL_CIPHER_find(SSL *ssl, const unsigned char *ptr) 2048{ 2049 return ssl->method->get_cipher_by_char(ptr); 2050} 2051 2052int SSL_CIPHER_get_cipher_nid(const SSL_CIPHER *c) 2053{ 2054 int i; 2055 if (c == NULL) 2056 return NID_undef; 2057 i = ssl_cipher_info_lookup(ssl_cipher_table_cipher, c->algorithm_enc); 2058 if (i == -1) 2059 return NID_undef; 2060 return ssl_cipher_table_cipher[i].nid; 2061} 2062 2063int SSL_CIPHER_get_digest_nid(const SSL_CIPHER *c) 2064{ 2065 int i = ssl_cipher_info_lookup(ssl_cipher_table_mac, c->algorithm_mac); 2066 2067 if (i == -1) 2068 return NID_undef; 2069 return ssl_cipher_table_mac[i].nid; 2070} 2071 2072int SSL_CIPHER_get_kx_nid(const SSL_CIPHER *c) 2073{ 2074 int i = ssl_cipher_info_lookup(ssl_cipher_table_kx, c->algorithm_mkey); 2075 2076 if (i == -1) 2077 return NID_undef; 2078 return ssl_cipher_table_kx[i].nid; 2079} 2080 2081int SSL_CIPHER_get_auth_nid(const SSL_CIPHER *c) 2082{ 2083 int i = ssl_cipher_info_lookup(ssl_cipher_table_auth, c->algorithm_auth); 2084 2085 if (i == -1) 2086 return NID_undef; 2087 return ssl_cipher_table_auth[i].nid; 2088} 2089 2090const EVP_MD *SSL_CIPHER_get_handshake_digest(const SSL_CIPHER *c) 2091{ 2092 int idx = c->algorithm2 & SSL_HANDSHAKE_MAC_MASK; 2093 2094 if (idx < 0 || idx >= SSL_MD_NUM_IDX) 2095 return NULL; 2096 return ssl_digest_methods[idx]; 2097} 2098 2099int SSL_CIPHER_is_aead(const SSL_CIPHER *c) 2100{ 2101 return (c->algorithm_mac & SSL_AEAD) ? 1 : 0; 2102} 2103 2104int ssl_cipher_get_overhead(const SSL_CIPHER *c, size_t *mac_overhead, 2105 size_t *int_overhead, size_t *blocksize, 2106 size_t *ext_overhead) 2107{ 2108 size_t mac = 0, in = 0, blk = 0, out = 0; 2109 2110 /* Some hard-coded numbers for the CCM/Poly1305 MAC overhead 2111 * because there are no handy #defines for those. */ 2112 if (c->algorithm_enc & (SSL_AESGCM | SSL_ARIAGCM)) { 2113 out = EVP_GCM_TLS_EXPLICIT_IV_LEN + EVP_GCM_TLS_TAG_LEN; 2114 } else if (c->algorithm_enc & (SSL_AES128CCM | SSL_AES256CCM)) { 2115 out = EVP_CCM_TLS_EXPLICIT_IV_LEN + 16; 2116 } else if (c->algorithm_enc & (SSL_AES128CCM8 | SSL_AES256CCM8)) { 2117 out = EVP_CCM_TLS_EXPLICIT_IV_LEN + 8; 2118 } else if (c->algorithm_enc & SSL_CHACHA20POLY1305) { 2119 out = 16; 2120 } else if (c->algorithm_mac & SSL_AEAD) { 2121 /* We're supposed to have handled all the AEAD modes above */ 2122 return 0; 2123 } else { 2124 /* Non-AEAD modes. Calculate MAC/cipher overhead separately */ 2125 int digest_nid = SSL_CIPHER_get_digest_nid(c); 2126 const EVP_MD *e_md = EVP_get_digestbynid(digest_nid); 2127 2128 if (e_md == NULL) 2129 return 0; 2130 2131 mac = EVP_MD_size(e_md); 2132 if (c->algorithm_enc != SSL_eNULL) { 2133 int cipher_nid = SSL_CIPHER_get_cipher_nid(c); 2134 const EVP_CIPHER *e_ciph = EVP_get_cipherbynid(cipher_nid); 2135 2136 /* If it wasn't AEAD or SSL_eNULL, we expect it to be a 2137 known CBC cipher. */ 2138 if (e_ciph == NULL || 2139 EVP_CIPHER_mode(e_ciph) != EVP_CIPH_CBC_MODE) 2140 return 0; 2141 2142 in = 1; /* padding length byte */ 2143 out = EVP_CIPHER_iv_length(e_ciph); 2144 blk = EVP_CIPHER_block_size(e_ciph); 2145 } 2146 } 2147 2148 *mac_overhead = mac; 2149 *int_overhead = in; 2150 *blocksize = blk; 2151 *ext_overhead = out; 2152 2153 return 1; 2154} 2155 2156int ssl_cert_is_disabled(size_t idx) 2157{ 2158 const SSL_CERT_LOOKUP *cl = ssl_cert_lookup_by_idx(idx); 2159 2160 if (cl == NULL || (cl->amask & disabled_auth_mask) != 0) 2161 return 1; 2162 return 0; 2163} 2164