1 /* 2 * Copyright 1995-2026 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 Apache License 2.0 (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 <openssl/trace.h> 20 #include "internal/nelem.h" 21 #include "ssl_local.h" 22 #include "internal/thread_once.h" 23 #include "internal/cryptlib.h" 24 #include "internal/comp.h" 25 #include "internal/ssl_unwrap.h" 26 27 /* NB: make sure indices in these tables match values above */ 28 29 typedef struct { 30 uint32_t mask; 31 int nid; 32 } ssl_cipher_table; 33 34 /* Table of NIDs for each cipher */ 35 static const ssl_cipher_table ssl_cipher_table_cipher[SSL_ENC_NUM_IDX] = { 36 { SSL_DES, NID_des_cbc }, /* SSL_ENC_DES_IDX 0 */ 37 { SSL_3DES, NID_des_ede3_cbc }, /* SSL_ENC_3DES_IDX 1 */ 38 { SSL_RC4, NID_rc4 }, /* SSL_ENC_RC4_IDX 2 */ 39 { SSL_RC2, NID_rc2_cbc }, /* SSL_ENC_RC2_IDX 3 */ 40 { SSL_IDEA, NID_idea_cbc }, /* SSL_ENC_IDEA_IDX 4 */ 41 { SSL_eNULL, NID_undef }, /* SSL_ENC_NULL_IDX 5 */ 42 { SSL_AES128, NID_aes_128_cbc }, /* SSL_ENC_AES128_IDX 6 */ 43 { SSL_AES256, NID_aes_256_cbc }, /* SSL_ENC_AES256_IDX 7 */ 44 { SSL_CAMELLIA128, NID_camellia_128_cbc }, /* SSL_ENC_CAMELLIA128_IDX 8 */ 45 { SSL_CAMELLIA256, NID_camellia_256_cbc }, /* SSL_ENC_CAMELLIA256_IDX 9 */ 46 { SSL_eGOST2814789CNT, NID_gost89_cnt }, /* SSL_ENC_GOST89_IDX 10 */ 47 { SSL_SEED, NID_seed_cbc }, /* SSL_ENC_SEED_IDX 11 */ 48 { SSL_AES128GCM, NID_aes_128_gcm }, /* SSL_ENC_AES128GCM_IDX 12 */ 49 { SSL_AES256GCM, NID_aes_256_gcm }, /* SSL_ENC_AES256GCM_IDX 13 */ 50 { SSL_AES128CCM, NID_aes_128_ccm }, /* SSL_ENC_AES128CCM_IDX 14 */ 51 { SSL_AES256CCM, NID_aes_256_ccm }, /* SSL_ENC_AES256CCM_IDX 15 */ 52 { SSL_AES128CCM8, NID_aes_128_ccm }, /* SSL_ENC_AES128CCM8_IDX 16 */ 53 { SSL_AES256CCM8, NID_aes_256_ccm }, /* SSL_ENC_AES256CCM8_IDX 17 */ 54 { SSL_eGOST2814789CNT12, NID_gost89_cnt_12 }, /* SSL_ENC_GOST8912_IDX 18 */ 55 { SSL_CHACHA20POLY1305, NID_chacha20_poly1305 }, /* SSL_ENC_CHACHA_IDX 19 */ 56 { SSL_ARIA128GCM, NID_aria_128_gcm }, /* SSL_ENC_ARIA128GCM_IDX 20 */ 57 { SSL_ARIA256GCM, NID_aria_256_gcm }, /* SSL_ENC_ARIA256GCM_IDX 21 */ 58 { SSL_MAGMA, NID_magma_ctr_acpkm }, /* SSL_ENC_MAGMA_IDX */ 59 { SSL_KUZNYECHIK, NID_kuznyechik_ctr_acpkm }, /* SSL_ENC_KUZNYECHIK_IDX */ 60 }; 61 62 /* NB: make sure indices in this table matches values above */ 63 static const ssl_cipher_table ssl_cipher_table_mac[SSL_MD_NUM_IDX] = { 64 { SSL_MD5, NID_md5 }, /* SSL_MD_MD5_IDX 0 */ 65 { SSL_SHA1, NID_sha1 }, /* SSL_MD_SHA1_IDX 1 */ 66 { SSL_GOST94, NID_id_GostR3411_94 }, /* SSL_MD_GOST94_IDX 2 */ 67 { SSL_GOST89MAC, NID_id_Gost28147_89_MAC }, /* SSL_MD_GOST89MAC_IDX 3 */ 68 { SSL_SHA256, NID_sha256 }, /* SSL_MD_SHA256_IDX 4 */ 69 { SSL_SHA384, NID_sha384 }, /* SSL_MD_SHA384_IDX 5 */ 70 { SSL_GOST12_256, NID_id_GostR3411_2012_256 }, /* SSL_MD_GOST12_256_IDX 6 */ 71 { SSL_GOST89MAC12, NID_gost_mac_12 }, /* SSL_MD_GOST89MAC12_IDX 7 */ 72 { SSL_GOST12_512, NID_id_GostR3411_2012_512 }, /* SSL_MD_GOST12_512_IDX 8 */ 73 { 0, NID_md5_sha1 }, /* SSL_MD_MD5_SHA1_IDX 9 */ 74 { 0, NID_sha224 }, /* SSL_MD_SHA224_IDX 10 */ 75 { 0, NID_sha512 }, /* SSL_MD_SHA512_IDX 11 */ 76 { SSL_MAGMAOMAC, NID_magma_mac }, /* sSL_MD_MAGMAOMAC_IDX */ 77 { SSL_KUZNYECHIKOMAC, NID_kuznyechik_mac } /* SSL_MD_KUZNYECHIKOMAC_IDX */ 78 }; 79 80 /* *INDENT-OFF* */ 81 static const ssl_cipher_table ssl_cipher_table_kx[] = { 82 { SSL_kRSA, NID_kx_rsa }, 83 { SSL_kECDHE, NID_kx_ecdhe }, 84 { SSL_kDHE, NID_kx_dhe }, 85 { SSL_kECDHEPSK, NID_kx_ecdhe_psk }, 86 { SSL_kDHEPSK, NID_kx_dhe_psk }, 87 { SSL_kRSAPSK, NID_kx_rsa_psk }, 88 { SSL_kPSK, NID_kx_psk }, 89 { SSL_kSRP, NID_kx_srp }, 90 { SSL_kGOST, NID_kx_gost }, 91 { SSL_kGOST18, NID_kx_gost18 }, 92 { SSL_kANY, NID_kx_any } 93 }; 94 95 static const ssl_cipher_table ssl_cipher_table_auth[] = { 96 { SSL_aRSA, NID_auth_rsa }, 97 { SSL_aECDSA, NID_auth_ecdsa }, 98 { SSL_aPSK, NID_auth_psk }, 99 { SSL_aDSS, NID_auth_dss }, 100 { SSL_aGOST01, NID_auth_gost01 }, 101 { SSL_aGOST12, NID_auth_gost12 }, 102 { SSL_aSRP, NID_auth_srp }, 103 { SSL_aNULL, NID_auth_null }, 104 { SSL_aANY, NID_auth_any } 105 }; 106 /* *INDENT-ON* */ 107 108 /* Utility function for table lookup */ 109 static int ssl_cipher_info_find(const ssl_cipher_table *table, 110 size_t table_cnt, uint32_t mask) 111 { 112 size_t i; 113 for (i = 0; i < table_cnt; i++, table++) { 114 if (table->mask == mask) 115 return (int)i; 116 } 117 return -1; 118 } 119 120 #define ssl_cipher_info_lookup(table, x) \ 121 ssl_cipher_info_find(table, OSSL_NELEM(table), x) 122 123 /* 124 * PKEY_TYPE for GOST89MAC is known in advance, but, because implementation 125 * is engine-provided, we'll fill it only if corresponding EVP_PKEY_METHOD is 126 * found 127 */ 128 static const int default_mac_pkey_id[SSL_MD_NUM_IDX] = { 129 /* MD5, SHA, GOST94, MAC89 */ 130 EVP_PKEY_HMAC, EVP_PKEY_HMAC, EVP_PKEY_HMAC, NID_undef, 131 /* SHA256, SHA384, GOST2012_256, MAC89-12 */ 132 EVP_PKEY_HMAC, EVP_PKEY_HMAC, EVP_PKEY_HMAC, NID_undef, 133 /* GOST2012_512 */ 134 EVP_PKEY_HMAC, 135 /* MD5/SHA1, SHA224, SHA512, MAGMAOMAC, KUZNYECHIKOMAC */ 136 NID_undef, NID_undef, NID_undef, NID_undef, NID_undef 137 }; 138 139 #define CIPHER_ADD 1 140 #define CIPHER_KILL 2 141 #define CIPHER_DEL 3 142 #define CIPHER_ORD 4 143 #define CIPHER_SPECIAL 5 144 /* 145 * Bump the ciphers to the top of the list. 146 * This rule isn't currently supported by the public cipherstring API. 147 */ 148 #define CIPHER_BUMP 6 149 150 typedef struct cipher_order_st { 151 const SSL_CIPHER *cipher; 152 int active; 153 int dead; 154 struct cipher_order_st *next, *prev; 155 } CIPHER_ORDER; 156 157 static const SSL_CIPHER cipher_aliases[] = { 158 /* "ALL" doesn't include eNULL (must be specifically enabled) */ 159 { 0, SSL_TXT_ALL, NULL, 0, 0, 0, ~SSL_eNULL }, 160 /* "COMPLEMENTOFALL" */ 161 { 0, SSL_TXT_CMPALL, NULL, 0, 0, 0, SSL_eNULL }, 162 163 /* 164 * "COMPLEMENTOFDEFAULT" (does *not* include ciphersuites not found in 165 * ALL!) 166 */ 167 { 0, SSL_TXT_CMPDEF, NULL, 0, 0, 0, 0, 0, 0, 0, 0, 0, SSL_NOT_DEFAULT }, 168 169 /* 170 * key exchange aliases (some of those using only a single bit here 171 * combine multiple key exchange algs according to the RFCs, e.g. kDHE 172 * combines DHE_DSS and DHE_RSA) 173 */ 174 { 0, SSL_TXT_kRSA, NULL, 0, SSL_kRSA }, 175 176 { 0, SSL_TXT_kEDH, NULL, 0, SSL_kDHE }, 177 { 0, SSL_TXT_kDHE, NULL, 0, SSL_kDHE }, 178 { 0, SSL_TXT_DH, NULL, 0, SSL_kDHE }, 179 180 { 0, SSL_TXT_kEECDH, NULL, 0, SSL_kECDHE }, 181 { 0, SSL_TXT_kECDHE, NULL, 0, SSL_kECDHE }, 182 { 0, SSL_TXT_ECDH, NULL, 0, SSL_kECDHE }, 183 184 { 0, SSL_TXT_kPSK, NULL, 0, SSL_kPSK }, 185 { 0, SSL_TXT_kRSAPSK, NULL, 0, SSL_kRSAPSK }, 186 { 0, SSL_TXT_kECDHEPSK, NULL, 0, SSL_kECDHEPSK }, 187 { 0, SSL_TXT_kDHEPSK, NULL, 0, SSL_kDHEPSK }, 188 { 0, SSL_TXT_kSRP, NULL, 0, SSL_kSRP }, 189 { 0, SSL_TXT_kGOST, NULL, 0, SSL_kGOST }, 190 { 0, SSL_TXT_kGOST18, NULL, 0, SSL_kGOST18 }, 191 192 /* server authentication aliases */ 193 { 0, SSL_TXT_aRSA, NULL, 0, 0, SSL_aRSA }, 194 { 0, SSL_TXT_aDSS, NULL, 0, 0, SSL_aDSS }, 195 { 0, SSL_TXT_DSS, NULL, 0, 0, SSL_aDSS }, 196 { 0, SSL_TXT_aNULL, NULL, 0, 0, SSL_aNULL }, 197 { 0, SSL_TXT_aECDSA, NULL, 0, 0, SSL_aECDSA }, 198 { 0, SSL_TXT_ECDSA, NULL, 0, 0, SSL_aECDSA }, 199 { 0, SSL_TXT_aPSK, NULL, 0, 0, SSL_aPSK }, 200 { 0, SSL_TXT_aGOST01, NULL, 0, 0, SSL_aGOST01 }, 201 { 0, SSL_TXT_aGOST12, NULL, 0, 0, SSL_aGOST12 }, 202 { 0, SSL_TXT_aGOST, NULL, 0, 0, SSL_aGOST01 | SSL_aGOST12 }, 203 { 0, SSL_TXT_aSRP, NULL, 0, 0, SSL_aSRP }, 204 205 /* aliases combining key exchange and server authentication */ 206 { 0, SSL_TXT_EDH, NULL, 0, SSL_kDHE, ~SSL_aNULL }, 207 { 0, SSL_TXT_DHE, NULL, 0, SSL_kDHE, ~SSL_aNULL }, 208 { 0, SSL_TXT_EECDH, NULL, 0, SSL_kECDHE, ~SSL_aNULL }, 209 { 0, SSL_TXT_ECDHE, NULL, 0, SSL_kECDHE, ~SSL_aNULL }, 210 { 0, SSL_TXT_NULL, NULL, 0, 0, 0, SSL_eNULL }, 211 { 0, SSL_TXT_RSA, NULL, 0, SSL_kRSA, SSL_aRSA }, 212 { 0, SSL_TXT_ADH, NULL, 0, SSL_kDHE, SSL_aNULL }, 213 { 0, SSL_TXT_AECDH, NULL, 0, SSL_kECDHE, SSL_aNULL }, 214 { 0, SSL_TXT_PSK, NULL, 0, SSL_PSK }, 215 { 0, SSL_TXT_SRP, NULL, 0, SSL_kSRP }, 216 217 /* symmetric encryption aliases */ 218 { 0, SSL_TXT_3DES, NULL, 0, 0, 0, SSL_3DES }, 219 { 0, SSL_TXT_RC4, NULL, 0, 0, 0, SSL_RC4 }, 220 { 0, SSL_TXT_RC2, NULL, 0, 0, 0, SSL_RC2 }, 221 { 0, SSL_TXT_IDEA, NULL, 0, 0, 0, SSL_IDEA }, 222 { 0, SSL_TXT_SEED, NULL, 0, 0, 0, SSL_SEED }, 223 { 0, SSL_TXT_eNULL, NULL, 0, 0, 0, SSL_eNULL }, 224 { 0, SSL_TXT_GOST, NULL, 0, 0, 0, 225 SSL_eGOST2814789CNT | SSL_eGOST2814789CNT12 | SSL_MAGMA | SSL_KUZNYECHIK }, 226 { 0, SSL_TXT_AES128, NULL, 0, 0, 0, 227 SSL_AES128 | SSL_AES128GCM | SSL_AES128CCM | SSL_AES128CCM8 }, 228 { 0, SSL_TXT_AES256, NULL, 0, 0, 0, 229 SSL_AES256 | SSL_AES256GCM | SSL_AES256CCM | SSL_AES256CCM8 }, 230 { 0, SSL_TXT_AES, NULL, 0, 0, 0, SSL_AES }, 231 { 0, SSL_TXT_AES_GCM, NULL, 0, 0, 0, SSL_AES128GCM | SSL_AES256GCM }, 232 { 0, SSL_TXT_AES_CCM, NULL, 0, 0, 0, 233 SSL_AES128CCM | SSL_AES256CCM | SSL_AES128CCM8 | SSL_AES256CCM8 }, 234 { 0, SSL_TXT_AES_CCM_8, NULL, 0, 0, 0, SSL_AES128CCM8 | SSL_AES256CCM8 }, 235 { 0, SSL_TXT_CAMELLIA128, NULL, 0, 0, 0, SSL_CAMELLIA128 }, 236 { 0, SSL_TXT_CAMELLIA256, NULL, 0, 0, 0, SSL_CAMELLIA256 }, 237 { 0, SSL_TXT_CAMELLIA, NULL, 0, 0, 0, SSL_CAMELLIA }, 238 { 0, SSL_TXT_CHACHA20, NULL, 0, 0, 0, SSL_CHACHA20 }, 239 { 0, SSL_TXT_GOST2012_GOST8912_GOST8912, NULL, 0, 0, 0, SSL_eGOST2814789CNT12 }, 240 241 { 0, SSL_TXT_ARIA, NULL, 0, 0, 0, SSL_ARIA }, 242 { 0, SSL_TXT_ARIA_GCM, NULL, 0, 0, 0, SSL_ARIA128GCM | SSL_ARIA256GCM }, 243 { 0, SSL_TXT_ARIA128, NULL, 0, 0, 0, SSL_ARIA128GCM }, 244 { 0, SSL_TXT_ARIA256, NULL, 0, 0, 0, SSL_ARIA256GCM }, 245 { 0, SSL_TXT_CBC, NULL, 0, 0, 0, SSL_CBC }, 246 247 /* MAC aliases */ 248 { 0, SSL_TXT_MD5, NULL, 0, 0, 0, 0, SSL_MD5 }, 249 { 0, SSL_TXT_SHA1, NULL, 0, 0, 0, 0, SSL_SHA1 }, 250 { 0, SSL_TXT_SHA, NULL, 0, 0, 0, 0, SSL_SHA1 }, 251 { 0, SSL_TXT_GOST94, NULL, 0, 0, 0, 0, SSL_GOST94 }, 252 { 0, SSL_TXT_GOST89MAC, NULL, 0, 0, 0, 0, SSL_GOST89MAC | SSL_GOST89MAC12 }, 253 { 0, SSL_TXT_SHA256, NULL, 0, 0, 0, 0, SSL_SHA256 }, 254 { 0, SSL_TXT_SHA384, NULL, 0, 0, 0, 0, SSL_SHA384 }, 255 { 0, SSL_TXT_GOST12, NULL, 0, 0, 0, 0, SSL_GOST12_256 }, 256 257 /* protocol version aliases */ 258 { 0, SSL_TXT_SSLV3, NULL, 0, 0, 0, 0, 0, SSL3_VERSION }, 259 { 0, SSL_TXT_TLSV1, NULL, 0, 0, 0, 0, 0, TLS1_VERSION }, 260 { 0, "TLSv1.0", NULL, 0, 0, 0, 0, 0, TLS1_VERSION }, 261 { 0, SSL_TXT_TLSV1_2, NULL, 0, 0, 0, 0, 0, TLS1_2_VERSION }, 262 263 /* strength classes */ 264 { 0, SSL_TXT_LOW, NULL, 0, 0, 0, 0, 0, 0, 0, 0, 0, SSL_LOW }, 265 { 0, SSL_TXT_MEDIUM, NULL, 0, 0, 0, 0, 0, 0, 0, 0, 0, SSL_MEDIUM }, 266 { 0, SSL_TXT_HIGH, NULL, 0, 0, 0, 0, 0, 0, 0, 0, 0, SSL_HIGH }, 267 /* FIPS 140-2 approved ciphersuite */ 268 { 0, SSL_TXT_FIPS, NULL, 0, 0, 0, ~SSL_eNULL, 0, 0, 0, 0, 0, SSL_FIPS }, 269 270 /* "EDH-" aliases to "DHE-" labels (for backward compatibility) */ 271 { 0, SSL3_TXT_EDH_DSS_DES_192_CBC3_SHA, NULL, 0, 272 SSL_kDHE, SSL_aDSS, SSL_3DES, SSL_SHA1, 0, 0, 0, 0, SSL_HIGH | SSL_FIPS }, 273 { 0, SSL3_TXT_EDH_RSA_DES_192_CBC3_SHA, NULL, 0, 274 SSL_kDHE, SSL_aRSA, SSL_3DES, SSL_SHA1, 0, 0, 0, 0, SSL_HIGH | SSL_FIPS }, 275 276 }; 277 278 /* 279 * Search for public key algorithm with given name and return its pkey_id if 280 * it is available. Otherwise return 0 281 */ 282 #ifdef OPENSSL_NO_ENGINE 283 284 static int get_optional_pkey_id(const char *pkey_name) 285 { 286 const EVP_PKEY_ASN1_METHOD *ameth; 287 int pkey_id = 0; 288 ameth = EVP_PKEY_asn1_find_str(NULL, pkey_name, -1); 289 if (ameth && EVP_PKEY_asn1_get0_info(&pkey_id, NULL, NULL, NULL, NULL, ameth) > 0) 290 return pkey_id; 291 return 0; 292 } 293 294 #else 295 296 static int get_optional_pkey_id(const char *pkey_name) 297 { 298 const EVP_PKEY_ASN1_METHOD *ameth; 299 ENGINE *tmpeng = NULL; 300 int pkey_id = 0; 301 ameth = EVP_PKEY_asn1_find_str(&tmpeng, pkey_name, -1); 302 if (ameth) { 303 if (EVP_PKEY_asn1_get0_info(&pkey_id, NULL, NULL, NULL, NULL, 304 ameth) 305 <= 0) 306 pkey_id = 0; 307 } 308 tls_engine_finish(tmpeng); 309 return pkey_id; 310 } 311 312 #endif 313 314 int ssl_load_ciphers(SSL_CTX *ctx) 315 { 316 size_t i; 317 const ssl_cipher_table *t; 318 EVP_KEYEXCH *kex = NULL; 319 EVP_SIGNATURE *sig = NULL; 320 321 ctx->disabled_enc_mask = 0; 322 for (i = 0, t = ssl_cipher_table_cipher; i < SSL_ENC_NUM_IDX; i++, t++) { 323 if (t->nid != NID_undef) { 324 const EVP_CIPHER *cipher 325 = ssl_evp_cipher_fetch(ctx->libctx, t->nid, ctx->propq); 326 327 ctx->ssl_cipher_methods[i] = cipher; 328 if (cipher == NULL) 329 ctx->disabled_enc_mask |= t->mask; 330 } 331 } 332 ctx->disabled_mac_mask = 0; 333 for (i = 0, t = ssl_cipher_table_mac; i < SSL_MD_NUM_IDX; i++, t++) { 334 const EVP_MD *md 335 = ssl_evp_md_fetch(ctx->libctx, t->nid, ctx->propq); 336 337 ctx->ssl_digest_methods[i] = md; 338 if (md == NULL) { 339 ctx->disabled_mac_mask |= t->mask; 340 } else { 341 int tmpsize = EVP_MD_get_size(md); 342 343 if (!ossl_assert(tmpsize > 0)) 344 return 0; 345 ctx->ssl_mac_secret_size[i] = tmpsize; 346 } 347 } 348 349 ctx->disabled_mkey_mask = 0; 350 ctx->disabled_auth_mask = 0; 351 352 /* 353 * We ignore any errors from the fetches below. They are expected to fail 354 * if these algorithms are not available. 355 */ 356 ERR_set_mark(); 357 sig = EVP_SIGNATURE_fetch(ctx->libctx, "DSA", ctx->propq); 358 if (sig == NULL) 359 ctx->disabled_auth_mask |= SSL_aDSS; 360 else 361 EVP_SIGNATURE_free(sig); 362 kex = EVP_KEYEXCH_fetch(ctx->libctx, "DH", ctx->propq); 363 if (kex == NULL) 364 ctx->disabled_mkey_mask |= SSL_kDHE | SSL_kDHEPSK; 365 else 366 EVP_KEYEXCH_free(kex); 367 kex = EVP_KEYEXCH_fetch(ctx->libctx, "ECDH", ctx->propq); 368 if (kex == NULL) 369 ctx->disabled_mkey_mask |= SSL_kECDHE | SSL_kECDHEPSK; 370 else 371 EVP_KEYEXCH_free(kex); 372 sig = EVP_SIGNATURE_fetch(ctx->libctx, "ECDSA", ctx->propq); 373 if (sig == NULL) 374 ctx->disabled_auth_mask |= SSL_aECDSA; 375 else 376 EVP_SIGNATURE_free(sig); 377 ERR_pop_to_mark(); 378 379 #ifdef OPENSSL_NO_PSK 380 ctx->disabled_mkey_mask |= SSL_PSK; 381 ctx->disabled_auth_mask |= SSL_aPSK; 382 #endif 383 #ifdef OPENSSL_NO_SRP 384 ctx->disabled_mkey_mask |= SSL_kSRP; 385 #endif 386 387 /* 388 * Check for presence of GOST 34.10 algorithms, and if they are not 389 * present, disable appropriate auth and key exchange 390 */ 391 memcpy(ctx->ssl_mac_pkey_id, default_mac_pkey_id, 392 sizeof(ctx->ssl_mac_pkey_id)); 393 394 ctx->ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX] = get_optional_pkey_id(SN_id_Gost28147_89_MAC); 395 if (ctx->ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX]) 396 ctx->ssl_mac_secret_size[SSL_MD_GOST89MAC_IDX] = 32; 397 else 398 ctx->disabled_mac_mask |= SSL_GOST89MAC; 399 400 ctx->ssl_mac_pkey_id[SSL_MD_GOST89MAC12_IDX] = get_optional_pkey_id(SN_gost_mac_12); 401 if (ctx->ssl_mac_pkey_id[SSL_MD_GOST89MAC12_IDX]) 402 ctx->ssl_mac_secret_size[SSL_MD_GOST89MAC12_IDX] = 32; 403 else 404 ctx->disabled_mac_mask |= SSL_GOST89MAC12; 405 406 ctx->ssl_mac_pkey_id[SSL_MD_MAGMAOMAC_IDX] = get_optional_pkey_id(SN_magma_mac); 407 if (ctx->ssl_mac_pkey_id[SSL_MD_MAGMAOMAC_IDX]) 408 ctx->ssl_mac_secret_size[SSL_MD_MAGMAOMAC_IDX] = 32; 409 else 410 ctx->disabled_mac_mask |= SSL_MAGMAOMAC; 411 412 ctx->ssl_mac_pkey_id[SSL_MD_KUZNYECHIKOMAC_IDX] = get_optional_pkey_id(SN_kuznyechik_mac); 413 if (ctx->ssl_mac_pkey_id[SSL_MD_KUZNYECHIKOMAC_IDX]) 414 ctx->ssl_mac_secret_size[SSL_MD_KUZNYECHIKOMAC_IDX] = 32; 415 else 416 ctx->disabled_mac_mask |= SSL_KUZNYECHIKOMAC; 417 418 if (!get_optional_pkey_id(SN_id_GostR3410_2001)) 419 ctx->disabled_auth_mask |= SSL_aGOST01 | SSL_aGOST12; 420 if (!get_optional_pkey_id(SN_id_GostR3410_2012_256)) 421 ctx->disabled_auth_mask |= SSL_aGOST12; 422 if (!get_optional_pkey_id(SN_id_GostR3410_2012_512)) 423 ctx->disabled_auth_mask |= SSL_aGOST12; 424 /* 425 * Disable GOST key exchange if no GOST signature algs are available * 426 */ 427 if ((ctx->disabled_auth_mask & (SSL_aGOST01 | SSL_aGOST12)) == (SSL_aGOST01 | SSL_aGOST12)) 428 ctx->disabled_mkey_mask |= SSL_kGOST; 429 430 if ((ctx->disabled_auth_mask & SSL_aGOST12) == SSL_aGOST12) 431 ctx->disabled_mkey_mask |= SSL_kGOST18; 432 433 return 1; 434 } 435 436 int ssl_cipher_get_evp_cipher(SSL_CTX *ctx, const SSL_CIPHER *sslc, 437 const EVP_CIPHER **enc) 438 { 439 int i = ssl_cipher_info_lookup(ssl_cipher_table_cipher, 440 sslc->algorithm_enc); 441 442 if (i == -1) { 443 *enc = NULL; 444 } else { 445 if (i == SSL_ENC_NULL_IDX) { 446 /* 447 * We assume we don't care about this coming from an ENGINE so 448 * just do a normal EVP_CIPHER_fetch instead of 449 * ssl_evp_cipher_fetch() 450 */ 451 *enc = EVP_CIPHER_fetch(ctx->libctx, "NULL", ctx->propq); 452 if (*enc == NULL) 453 return 0; 454 } else { 455 const EVP_CIPHER *cipher = ctx->ssl_cipher_methods[i]; 456 457 if (cipher == NULL 458 || !ssl_evp_cipher_up_ref(cipher)) 459 return 0; 460 *enc = ctx->ssl_cipher_methods[i]; 461 } 462 } 463 return 1; 464 } 465 466 int ssl_cipher_get_evp_md_mac(SSL_CTX *ctx, const SSL_CIPHER *sslc, 467 const EVP_MD **md, 468 int *mac_pkey_type, size_t *mac_secret_size) 469 { 470 int i = ssl_cipher_info_lookup(ssl_cipher_table_mac, sslc->algorithm_mac); 471 472 if (i == -1) { 473 *md = NULL; 474 if (mac_pkey_type != NULL) 475 *mac_pkey_type = NID_undef; 476 if (mac_secret_size != NULL) 477 *mac_secret_size = 0; 478 } else { 479 const EVP_MD *digest = ctx->ssl_digest_methods[i]; 480 481 if (digest == NULL || !ssl_evp_md_up_ref(digest)) 482 return 0; 483 484 *md = digest; 485 if (mac_pkey_type != NULL) 486 *mac_pkey_type = ctx->ssl_mac_pkey_id[i]; 487 if (mac_secret_size != NULL) 488 *mac_secret_size = ctx->ssl_mac_secret_size[i]; 489 } 490 return 1; 491 } 492 493 int ssl_cipher_get_evp(SSL_CTX *ctx, const SSL_SESSION *s, 494 const EVP_CIPHER **enc, const EVP_MD **md, 495 int *mac_pkey_type, size_t *mac_secret_size, 496 SSL_COMP **comp, int use_etm) 497 { 498 int i; 499 const SSL_CIPHER *c; 500 501 c = s->cipher; 502 if (c == NULL) 503 return 0; 504 if (comp != NULL) { 505 SSL_COMP ctmp; 506 STACK_OF(SSL_COMP) *comp_methods; 507 508 *comp = NULL; 509 ctmp.id = s->compress_meth; 510 comp_methods = SSL_COMP_get_compression_methods(); 511 if (comp_methods != NULL) { 512 i = sk_SSL_COMP_find(comp_methods, &ctmp); 513 if (i >= 0) 514 *comp = sk_SSL_COMP_value(comp_methods, i); 515 } 516 /* If were only interested in comp then return success */ 517 if ((enc == NULL) && (md == NULL)) 518 return 1; 519 } 520 521 if ((enc == NULL) || (md == NULL)) 522 return 0; 523 524 if (!ssl_cipher_get_evp_cipher(ctx, c, enc)) 525 return 0; 526 527 if (!ssl_cipher_get_evp_md_mac(ctx, c, md, mac_pkey_type, 528 mac_secret_size)) { 529 ssl_evp_cipher_free(*enc); 530 return 0; 531 } 532 533 if ((*enc != NULL) 534 && (*md != NULL 535 || (EVP_CIPHER_get_flags(*enc) & EVP_CIPH_FLAG_AEAD_CIPHER)) 536 && (c->algorithm_mac == SSL_AEAD 537 || mac_pkey_type == NULL || *mac_pkey_type != NID_undef)) { 538 const EVP_CIPHER *evp = NULL; 539 540 if (use_etm 541 || s->ssl_version >> 8 != TLS1_VERSION_MAJOR 542 || s->ssl_version < TLS1_VERSION) 543 return 1; 544 545 if (c->algorithm_enc == SSL_RC4 546 && c->algorithm_mac == SSL_MD5) 547 evp = ssl_evp_cipher_fetch(ctx->libctx, NID_rc4_hmac_md5, 548 ctx->propq); 549 else if (c->algorithm_enc == SSL_AES128 550 && c->algorithm_mac == SSL_SHA1) 551 evp = ssl_evp_cipher_fetch(ctx->libctx, 552 NID_aes_128_cbc_hmac_sha1, 553 ctx->propq); 554 else if (c->algorithm_enc == SSL_AES256 555 && c->algorithm_mac == SSL_SHA1) 556 evp = ssl_evp_cipher_fetch(ctx->libctx, 557 NID_aes_256_cbc_hmac_sha1, 558 ctx->propq); 559 else if (c->algorithm_enc == SSL_AES128 560 && c->algorithm_mac == SSL_SHA256) 561 evp = ssl_evp_cipher_fetch(ctx->libctx, 562 NID_aes_128_cbc_hmac_sha256, 563 ctx->propq); 564 else if (c->algorithm_enc == SSL_AES256 565 && c->algorithm_mac == SSL_SHA256) 566 evp = ssl_evp_cipher_fetch(ctx->libctx, 567 NID_aes_256_cbc_hmac_sha256, 568 ctx->propq); 569 570 if (evp != NULL) { 571 ssl_evp_cipher_free(*enc); 572 ssl_evp_md_free(*md); 573 *enc = evp; 574 *md = NULL; 575 } 576 return 1; 577 } 578 579 return 0; 580 } 581 582 const EVP_MD *ssl_md(SSL_CTX *ctx, int idx) 583 { 584 idx &= SSL_HANDSHAKE_MAC_MASK; 585 if (idx < 0 || idx >= SSL_MD_NUM_IDX) 586 return NULL; 587 return ctx->ssl_digest_methods[idx]; 588 } 589 590 const EVP_MD *ssl_handshake_md(SSL_CONNECTION *s) 591 { 592 return ssl_md(SSL_CONNECTION_GET_CTX(s), ssl_get_algorithm2(s)); 593 } 594 595 const EVP_MD *ssl_prf_md(SSL_CONNECTION *s) 596 { 597 return ssl_md(SSL_CONNECTION_GET_CTX(s), 598 ssl_get_algorithm2(s) >> TLS1_PRF_DGST_SHIFT); 599 } 600 601 #define ITEM_SEP(a) \ 602 (((a) == ':') || ((a) == ' ') || ((a) == ';') || ((a) == ',')) 603 604 static void ll_append_tail(CIPHER_ORDER **head, CIPHER_ORDER *curr, 605 CIPHER_ORDER **tail) 606 { 607 if (curr == *tail) 608 return; 609 if (curr == *head) 610 *head = curr->next; 611 if (curr->prev != NULL) 612 curr->prev->next = curr->next; 613 if (curr->next != NULL) 614 curr->next->prev = curr->prev; 615 (*tail)->next = curr; 616 curr->prev = *tail; 617 curr->next = NULL; 618 *tail = curr; 619 } 620 621 static void ll_append_head(CIPHER_ORDER **head, CIPHER_ORDER *curr, 622 CIPHER_ORDER **tail) 623 { 624 if (curr == *head) 625 return; 626 if (curr == *tail) 627 *tail = curr->prev; 628 if (curr->next != NULL) 629 curr->next->prev = curr->prev; 630 if (curr->prev != NULL) 631 curr->prev->next = curr->next; 632 (*head)->prev = curr; 633 curr->next = *head; 634 curr->prev = NULL; 635 *head = curr; 636 } 637 638 static void ssl_cipher_collect_ciphers(const SSL_METHOD *ssl_method, 639 int num_of_ciphers, 640 uint32_t disabled_mkey, 641 uint32_t disabled_auth, 642 uint32_t disabled_enc, 643 uint32_t disabled_mac, 644 CIPHER_ORDER *co_list, 645 CIPHER_ORDER **head_p, 646 CIPHER_ORDER **tail_p) 647 { 648 int i, co_list_num; 649 const SSL_CIPHER *c; 650 651 /* 652 * We have num_of_ciphers descriptions compiled in, depending on the 653 * method selected (SSLv3, TLSv1 etc). 654 * These will later be sorted in a linked list with at most num 655 * entries. 656 */ 657 658 /* Get the initial list of ciphers */ 659 co_list_num = 0; /* actual count of ciphers */ 660 for (i = 0; i < num_of_ciphers; i++) { 661 c = ssl_method->get_cipher(i); 662 /* drop those that use any of that is not available */ 663 if (c == NULL || !c->valid) 664 continue; 665 if ((c->algorithm_mkey & disabled_mkey) || (c->algorithm_auth & disabled_auth) || (c->algorithm_enc & disabled_enc) || (c->algorithm_mac & disabled_mac)) 666 continue; 667 if (((ssl_method->ssl3_enc->enc_flags & SSL_ENC_FLAG_DTLS) == 0) && c->min_tls == 0) 668 continue; 669 if (((ssl_method->ssl3_enc->enc_flags & SSL_ENC_FLAG_DTLS) != 0) && c->min_dtls == 0) 670 continue; 671 672 co_list[co_list_num].cipher = c; 673 co_list[co_list_num].next = NULL; 674 co_list[co_list_num].prev = NULL; 675 co_list[co_list_num].active = 0; 676 co_list_num++; 677 } 678 679 /* 680 * Prepare linked list from list entries 681 */ 682 if (co_list_num > 0) { 683 co_list[0].prev = NULL; 684 685 if (co_list_num > 1) { 686 co_list[0].next = &co_list[1]; 687 688 for (i = 1; i < co_list_num - 1; i++) { 689 co_list[i].prev = &co_list[i - 1]; 690 co_list[i].next = &co_list[i + 1]; 691 } 692 693 co_list[co_list_num - 1].prev = &co_list[co_list_num - 2]; 694 } 695 696 co_list[co_list_num - 1].next = NULL; 697 698 *head_p = &co_list[0]; 699 *tail_p = &co_list[co_list_num - 1]; 700 } 701 } 702 703 static void ssl_cipher_collect_aliases(const SSL_CIPHER **ca_list, 704 int num_of_group_aliases, 705 uint32_t disabled_mkey, 706 uint32_t disabled_auth, 707 uint32_t disabled_enc, 708 uint32_t disabled_mac, 709 CIPHER_ORDER *head) 710 { 711 CIPHER_ORDER *ciph_curr; 712 const SSL_CIPHER **ca_curr; 713 int i; 714 uint32_t mask_mkey = ~disabled_mkey; 715 uint32_t mask_auth = ~disabled_auth; 716 uint32_t mask_enc = ~disabled_enc; 717 uint32_t mask_mac = ~disabled_mac; 718 719 /* 720 * First, add the real ciphers as already collected 721 */ 722 ciph_curr = head; 723 ca_curr = ca_list; 724 while (ciph_curr != NULL) { 725 *ca_curr = ciph_curr->cipher; 726 ca_curr++; 727 ciph_curr = ciph_curr->next; 728 } 729 730 /* 731 * Now we add the available ones from the cipher_aliases[] table. 732 * They represent either one or more algorithms, some of which 733 * in any affected category must be supported (set in enabled_mask), 734 * or represent a cipher strength value (will be added in any case because algorithms=0). 735 */ 736 for (i = 0; i < num_of_group_aliases; i++) { 737 uint32_t algorithm_mkey = cipher_aliases[i].algorithm_mkey; 738 uint32_t algorithm_auth = cipher_aliases[i].algorithm_auth; 739 uint32_t algorithm_enc = cipher_aliases[i].algorithm_enc; 740 uint32_t algorithm_mac = cipher_aliases[i].algorithm_mac; 741 742 if (algorithm_mkey) 743 if ((algorithm_mkey & mask_mkey) == 0) 744 continue; 745 746 if (algorithm_auth) 747 if ((algorithm_auth & mask_auth) == 0) 748 continue; 749 750 if (algorithm_enc) 751 if ((algorithm_enc & mask_enc) == 0) 752 continue; 753 754 if (algorithm_mac) 755 if ((algorithm_mac & mask_mac) == 0) 756 continue; 757 758 *ca_curr = (SSL_CIPHER *)(cipher_aliases + i); 759 ca_curr++; 760 } 761 762 *ca_curr = NULL; /* end of list */ 763 } 764 765 static void ssl_cipher_apply_rule(uint32_t cipher_id, uint32_t alg_mkey, 766 uint32_t alg_auth, uint32_t alg_enc, 767 uint32_t alg_mac, int min_tls, 768 uint32_t algo_strength, int rule, 769 int32_t strength_bits, CIPHER_ORDER **head_p, 770 CIPHER_ORDER **tail_p) 771 { 772 CIPHER_ORDER *head, *tail, *curr, *next, *last; 773 const SSL_CIPHER *cp; 774 int reverse = 0; 775 776 OSSL_TRACE_BEGIN(TLS_CIPHER) 777 { 778 BIO_printf(trc_out, 779 "Applying rule %d with %08x/%08x/%08x/%08x/%08x %08x (%d)\n", 780 rule, (unsigned int)alg_mkey, (unsigned int)alg_auth, 781 (unsigned int)alg_enc, (unsigned int)alg_mac, min_tls, 782 (unsigned int)algo_strength, (int)strength_bits); 783 } 784 785 if (rule == CIPHER_DEL || rule == CIPHER_BUMP) 786 reverse = 1; /* needed to maintain sorting between currently 787 * deleted ciphers */ 788 789 head = *head_p; 790 tail = *tail_p; 791 792 if (reverse) { 793 next = tail; 794 last = head; 795 } else { 796 next = head; 797 last = tail; 798 } 799 800 curr = NULL; 801 for (;;) { 802 if (curr == last) 803 break; 804 805 curr = next; 806 807 if (curr == NULL) 808 break; 809 810 next = reverse ? curr->prev : curr->next; 811 812 cp = curr->cipher; 813 814 /* 815 * Selection criteria is either the value of strength_bits 816 * or the algorithms used. 817 */ 818 if (strength_bits >= 0) { 819 if (strength_bits != cp->strength_bits) 820 continue; 821 } else { 822 if (trc_out != NULL) { 823 BIO_printf(trc_out, 824 "\nName: %s:" 825 "\nAlgo = %08x/%08x/%08x/%08x/%08x Algo_strength = %08x\n", 826 cp->name, 827 (unsigned int)cp->algorithm_mkey, 828 (unsigned int)cp->algorithm_auth, 829 (unsigned int)cp->algorithm_enc, 830 (unsigned int)cp->algorithm_mac, 831 cp->min_tls, 832 (unsigned int)cp->algo_strength); 833 } 834 if (cipher_id != 0 && (cipher_id != cp->id)) 835 continue; 836 if (alg_mkey && !(alg_mkey & cp->algorithm_mkey)) 837 continue; 838 if (alg_auth && !(alg_auth & cp->algorithm_auth)) 839 continue; 840 if (alg_enc && !(alg_enc & cp->algorithm_enc)) 841 continue; 842 if (alg_mac && !(alg_mac & cp->algorithm_mac)) 843 continue; 844 if (min_tls && (min_tls != cp->min_tls)) 845 continue; 846 if ((algo_strength & SSL_STRONG_MASK) 847 && !(algo_strength & SSL_STRONG_MASK & cp->algo_strength)) 848 continue; 849 if ((algo_strength & SSL_DEFAULT_MASK) 850 && !(algo_strength & SSL_DEFAULT_MASK & cp->algo_strength)) 851 continue; 852 } 853 854 if (trc_out != NULL) 855 BIO_printf(trc_out, "Action = %d\n", rule); 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 OSSL_TRACE_END(TLS_CIPHER); 907 } 908 909 static 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 return 0; 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')) || ((ch >= '0') && (ch <= '9')) || ((ch >= 'a') && (ch <= 'z')) || (ch == '-') || (ch == '_') || (ch == '.') || (ch == '=')) 1008 #else 1009 while (isalnum((unsigned char)ch) || (ch == '-') || (ch == '_') || (ch == '.') 1010 || (ch == '=')) 1011 #endif 1012 { 1013 ch = *(++l); 1014 buflen++; 1015 } 1016 1017 if (buflen == 0) { 1018 /* 1019 * We hit something we cannot deal with, 1020 * it is no command or separator nor 1021 * alphanumeric, so we call this an error. 1022 */ 1023 ERR_raise(ERR_LIB_SSL, SSL_R_INVALID_COMMAND); 1024 return 0; 1025 } 1026 1027 if (rule == CIPHER_SPECIAL) { 1028 found = 0; /* unused -- avoid compiler warning */ 1029 break; /* special treatment */ 1030 } 1031 1032 /* check for multi-part specification */ 1033 if (ch == '+') { 1034 multi = 1; 1035 l++; 1036 } else { 1037 multi = 0; 1038 } 1039 1040 /* 1041 * Now search for the cipher alias in the ca_list. Be careful 1042 * with the strncmp, because the "buflen" limitation 1043 * will make the rule "ADH:SOME" and the cipher 1044 * "ADH-MY-CIPHER" look like a match for buflen=3. 1045 * So additionally check whether the cipher name found 1046 * has the correct length. We can save a strlen() call: 1047 * just checking for the '\0' at the right place is 1048 * sufficient, we have to strncmp() anyway. (We cannot 1049 * use strcmp(), because buf is not '\0' terminated.) 1050 */ 1051 j = found = 0; 1052 cipher_id = 0; 1053 while (ca_list[j]) { 1054 if (strncmp(buf, ca_list[j]->name, buflen) == 0 1055 && (ca_list[j]->name[buflen] == '\0')) { 1056 found = 1; 1057 break; 1058 } else if (ca_list[j]->stdname != NULL 1059 && strncmp(buf, ca_list[j]->stdname, buflen) == 0 1060 && ca_list[j]->stdname[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 &= (ca_list[j]->algo_strength & SSL_STRONG_MASK) | ~SSL_STRONG_MASK; 1121 if (!(algo_strength & SSL_STRONG_MASK)) { 1122 found = 0; 1123 break; 1124 } 1125 } else { 1126 algo_strength = ca_list[j]->algo_strength & SSL_STRONG_MASK; 1127 } 1128 } 1129 1130 if (ca_list[j]->algo_strength & SSL_DEFAULT_MASK) { 1131 if (algo_strength & SSL_DEFAULT_MASK) { 1132 algo_strength &= (ca_list[j]->algo_strength & SSL_DEFAULT_MASK) | ~SSL_DEFAULT_MASK; 1133 if (!(algo_strength & SSL_DEFAULT_MASK)) { 1134 found = 0; 1135 break; 1136 } 1137 } else { 1138 algo_strength |= ca_list[j]->algo_strength & SSL_DEFAULT_MASK; 1139 } 1140 } 1141 1142 if (ca_list[j]->valid) { 1143 /* 1144 * explicit ciphersuite found; its protocol version does not 1145 * become part of the search pattern! 1146 */ 1147 1148 cipher_id = ca_list[j]->id; 1149 } else { 1150 /* 1151 * not an explicit ciphersuite; only in this case, the 1152 * protocol version is considered part of the search pattern 1153 */ 1154 1155 if (ca_list[j]->min_tls) { 1156 if (min_tls != 0 && min_tls != ca_list[j]->min_tls) { 1157 found = 0; 1158 break; 1159 } else { 1160 min_tls = ca_list[j]->min_tls; 1161 } 1162 } 1163 } 1164 1165 if (!multi) 1166 break; 1167 } 1168 1169 /* 1170 * Ok, we have the rule, now apply it 1171 */ 1172 if (rule == CIPHER_SPECIAL) { /* special command */ 1173 ok = 0; 1174 if ((buflen == 8) && HAS_PREFIX(buf, "STRENGTH")) { 1175 ok = ssl_cipher_strength_sort(head_p, tail_p); 1176 } else if (buflen == 10 && CHECK_AND_SKIP_PREFIX(buf, "SECLEVEL=")) { 1177 int level = *buf - '0'; 1178 if (level < 0 || level > 5) { 1179 ERR_raise(ERR_LIB_SSL, SSL_R_INVALID_COMMAND); 1180 } else { 1181 c->sec_level = level; 1182 ok = 1; 1183 } 1184 } else { 1185 ERR_raise(ERR_LIB_SSL, SSL_R_INVALID_COMMAND); 1186 } 1187 if (ok == 0) 1188 retval = 0; 1189 /* 1190 * We do not support any "multi" options 1191 * together with "@", so throw away the 1192 * rest of the command, if any left, until 1193 * end or ':' is found. 1194 */ 1195 while ((*l != '\0') && !ITEM_SEP(*l)) 1196 l++; 1197 } else if (found) { 1198 ssl_cipher_apply_rule(cipher_id, 1199 alg_mkey, alg_auth, alg_enc, alg_mac, 1200 min_tls, algo_strength, rule, -1, head_p, 1201 tail_p); 1202 } else { 1203 while ((*l != '\0') && !ITEM_SEP(*l)) 1204 l++; 1205 } 1206 if (*l == '\0') 1207 break; /* done */ 1208 } 1209 1210 return retval; 1211 } 1212 1213 static int check_suiteb_cipher_list(const SSL_METHOD *meth, CERT *c, 1214 const char **prule_str) 1215 { 1216 unsigned int suiteb_flags = 0, suiteb_comb2 = 0; 1217 if (HAS_PREFIX(*prule_str, "SUITEB128ONLY")) { 1218 suiteb_flags = SSL_CERT_FLAG_SUITEB_128_LOS_ONLY; 1219 } else if (HAS_PREFIX(*prule_str, "SUITEB128C2")) { 1220 suiteb_comb2 = 1; 1221 suiteb_flags = SSL_CERT_FLAG_SUITEB_128_LOS; 1222 } else if (HAS_PREFIX(*prule_str, "SUITEB128")) { 1223 suiteb_flags = SSL_CERT_FLAG_SUITEB_128_LOS; 1224 } else if (HAS_PREFIX(*prule_str, "SUITEB192")) { 1225 suiteb_flags = SSL_CERT_FLAG_SUITEB_192_LOS; 1226 } 1227 1228 if (suiteb_flags) { 1229 c->cert_flags &= ~SSL_CERT_FLAG_SUITEB_128_LOS; 1230 c->cert_flags |= suiteb_flags; 1231 } else { 1232 suiteb_flags = c->cert_flags & SSL_CERT_FLAG_SUITEB_128_LOS; 1233 } 1234 1235 if (!suiteb_flags) 1236 return 1; 1237 /* Check version: if TLS 1.2 ciphers allowed we can use Suite B */ 1238 1239 if (!(meth->ssl3_enc->enc_flags & SSL_ENC_FLAG_TLS1_2_CIPHERS)) { 1240 ERR_raise(ERR_LIB_SSL, SSL_R_AT_LEAST_TLS_1_2_NEEDED_IN_SUITEB_MODE); 1241 return 0; 1242 } 1243 1244 switch (suiteb_flags) { 1245 case SSL_CERT_FLAG_SUITEB_128_LOS: 1246 if (suiteb_comb2) 1247 *prule_str = "ECDHE-ECDSA-AES256-GCM-SHA384"; 1248 else 1249 *prule_str = "ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384"; 1250 break; 1251 case SSL_CERT_FLAG_SUITEB_128_LOS_ONLY: 1252 *prule_str = "ECDHE-ECDSA-AES128-GCM-SHA256"; 1253 break; 1254 case SSL_CERT_FLAG_SUITEB_192_LOS: 1255 *prule_str = "ECDHE-ECDSA-AES256-GCM-SHA384"; 1256 break; 1257 } 1258 return 1; 1259 } 1260 1261 static int ciphersuite_cb(const char *elem, int len, void *arg) 1262 { 1263 STACK_OF(SSL_CIPHER) *ciphersuites = (STACK_OF(SSL_CIPHER) *)arg; 1264 const SSL_CIPHER *cipher; 1265 /* Arbitrary sized temp buffer for the cipher name. Should be big enough */ 1266 char name[80]; 1267 1268 /* CONF_parse_list signals empty elements with elem == NULL; skip them */ 1269 if (elem == NULL || len == 0) 1270 return 1; 1271 1272 if (len > (int)(sizeof(name) - 1)) 1273 /* Anyway return 1 so we can parse rest of the list */ 1274 return 1; 1275 1276 memcpy(name, elem, len); 1277 name[len] = '\0'; 1278 1279 cipher = ssl3_get_cipher_by_std_name(name); 1280 if (cipher == NULL) 1281 /* Ciphersuite not found but return 1 to parse rest of the list */ 1282 return 1; 1283 1284 if (!sk_SSL_CIPHER_push(ciphersuites, cipher)) { 1285 ERR_raise(ERR_LIB_SSL, ERR_R_INTERNAL_ERROR); 1286 return 0; 1287 } 1288 1289 return 1; 1290 } 1291 1292 static __owur int set_ciphersuites(STACK_OF(SSL_CIPHER) **currciphers, const char *str) 1293 { 1294 STACK_OF(SSL_CIPHER) *newciphers = sk_SSL_CIPHER_new_null(); 1295 1296 if (newciphers == NULL) 1297 return 0; 1298 1299 /* Parse the list. We explicitly allow an empty list */ 1300 if (*str != '\0' 1301 && (CONF_parse_list(str, ':', 1, ciphersuite_cb, newciphers) <= 0 1302 || sk_SSL_CIPHER_num(newciphers) == 0)) { 1303 ERR_raise(ERR_LIB_SSL, SSL_R_NO_CIPHER_MATCH); 1304 sk_SSL_CIPHER_free(newciphers); 1305 return 0; 1306 } 1307 sk_SSL_CIPHER_free(*currciphers); 1308 *currciphers = newciphers; 1309 1310 return 1; 1311 } 1312 1313 static int update_cipher_list_by_id(STACK_OF(SSL_CIPHER) **cipher_list_by_id, 1314 STACK_OF(SSL_CIPHER) *cipherstack) 1315 { 1316 STACK_OF(SSL_CIPHER) *tmp_cipher_list = sk_SSL_CIPHER_dup(cipherstack); 1317 1318 if (tmp_cipher_list == NULL) { 1319 return 0; 1320 } 1321 1322 sk_SSL_CIPHER_free(*cipher_list_by_id); 1323 *cipher_list_by_id = tmp_cipher_list; 1324 1325 (void)sk_SSL_CIPHER_set_cmp_func(*cipher_list_by_id, ssl_cipher_ptr_id_cmp); 1326 sk_SSL_CIPHER_sort(*cipher_list_by_id); 1327 1328 return 1; 1329 } 1330 1331 static int update_cipher_list(SSL_CTX *ctx, 1332 STACK_OF(SSL_CIPHER) **cipher_list, 1333 STACK_OF(SSL_CIPHER) **cipher_list_by_id, 1334 STACK_OF(SSL_CIPHER) *tls13_ciphersuites) 1335 { 1336 int i; 1337 STACK_OF(SSL_CIPHER) *tmp_cipher_list = sk_SSL_CIPHER_dup(*cipher_list); 1338 1339 if (tmp_cipher_list == NULL) 1340 return 0; 1341 1342 /* 1343 * Delete any existing TLSv1.3 ciphersuites. These are always first in the 1344 * list. 1345 */ 1346 while (sk_SSL_CIPHER_num(tmp_cipher_list) > 0 1347 && sk_SSL_CIPHER_value(tmp_cipher_list, 0)->min_tls 1348 == TLS1_3_VERSION) 1349 (void)sk_SSL_CIPHER_delete(tmp_cipher_list, 0); 1350 1351 /* Insert the new TLSv1.3 ciphersuites */ 1352 for (i = sk_SSL_CIPHER_num(tls13_ciphersuites) - 1; i >= 0; i--) { 1353 const SSL_CIPHER *sslc = sk_SSL_CIPHER_value(tls13_ciphersuites, i); 1354 1355 /* Don't include any TLSv1.3 ciphersuites that are disabled */ 1356 if ((sslc->algorithm_enc & ctx->disabled_enc_mask) == 0 1357 && (ssl_cipher_table_mac[sslc->algorithm2 1358 & SSL_HANDSHAKE_MAC_MASK] 1359 .mask 1360 & ctx->disabled_mac_mask) 1361 == 0) { 1362 sk_SSL_CIPHER_unshift(tmp_cipher_list, sslc); 1363 } 1364 } 1365 1366 if (!update_cipher_list_by_id(cipher_list_by_id, tmp_cipher_list)) { 1367 sk_SSL_CIPHER_free(tmp_cipher_list); 1368 return 0; 1369 } 1370 1371 sk_SSL_CIPHER_free(*cipher_list); 1372 *cipher_list = tmp_cipher_list; 1373 1374 return 1; 1375 } 1376 1377 int SSL_CTX_set_ciphersuites(SSL_CTX *ctx, const char *str) 1378 { 1379 int ret = set_ciphersuites(&(ctx->tls13_ciphersuites), str); 1380 1381 if (ret && ctx->cipher_list != NULL) 1382 return update_cipher_list(ctx, &ctx->cipher_list, &ctx->cipher_list_by_id, 1383 ctx->tls13_ciphersuites); 1384 1385 return ret; 1386 } 1387 1388 int SSL_set_ciphersuites(SSL *s, const char *str) 1389 { 1390 STACK_OF(SSL_CIPHER) *cipher_list; 1391 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s); 1392 int ret; 1393 1394 if (sc == NULL) 1395 return 0; 1396 1397 ret = set_ciphersuites(&(sc->tls13_ciphersuites), str); 1398 1399 if (sc->cipher_list == NULL) { 1400 if ((cipher_list = SSL_get_ciphers(s)) != NULL) 1401 sc->cipher_list = sk_SSL_CIPHER_dup(cipher_list); 1402 } 1403 if (ret && sc->cipher_list != NULL) 1404 return update_cipher_list(s->ctx, &sc->cipher_list, 1405 &sc->cipher_list_by_id, 1406 sc->tls13_ciphersuites); 1407 1408 return ret; 1409 } 1410 1411 STACK_OF(SSL_CIPHER) *ssl_create_cipher_list(SSL_CTX *ctx, 1412 STACK_OF(SSL_CIPHER) *tls13_ciphersuites, 1413 STACK_OF(SSL_CIPHER) **cipher_list, 1414 STACK_OF(SSL_CIPHER) **cipher_list_by_id, 1415 const char *rule_str, 1416 CERT *c) 1417 { 1418 int ok, num_of_ciphers, num_of_alias_max, num_of_group_aliases, i; 1419 uint32_t disabled_mkey, disabled_auth, disabled_enc, disabled_mac; 1420 STACK_OF(SSL_CIPHER) *cipherstack; 1421 const char *rule_p; 1422 CIPHER_ORDER *co_list = NULL, *head = NULL, *tail = NULL, *curr; 1423 const SSL_CIPHER **ca_list = NULL; 1424 const SSL_METHOD *ssl_method = ctx->method; 1425 1426 /* 1427 * Return with error if nothing to do. 1428 */ 1429 if (rule_str == NULL || cipher_list == NULL || cipher_list_by_id == NULL) 1430 return NULL; 1431 1432 if (!check_suiteb_cipher_list(ssl_method, c, &rule_str)) 1433 return NULL; 1434 1435 /* 1436 * To reduce the work to do we only want to process the compiled 1437 * in algorithms, so we first get the mask of disabled ciphers. 1438 */ 1439 1440 disabled_mkey = ctx->disabled_mkey_mask; 1441 disabled_auth = ctx->disabled_auth_mask; 1442 disabled_enc = ctx->disabled_enc_mask; 1443 disabled_mac = ctx->disabled_mac_mask; 1444 1445 /* 1446 * Now we have to collect the available ciphers from the compiled 1447 * in ciphers. We cannot get more than the number compiled in, so 1448 * it is used for allocation. 1449 */ 1450 num_of_ciphers = ssl_method->num_ciphers(); 1451 1452 if (num_of_ciphers > 0) { 1453 co_list = OPENSSL_malloc(sizeof(*co_list) * num_of_ciphers); 1454 if (co_list == NULL) 1455 return NULL; /* Failure */ 1456 } 1457 1458 ssl_cipher_collect_ciphers(ssl_method, num_of_ciphers, 1459 disabled_mkey, disabled_auth, disabled_enc, 1460 disabled_mac, co_list, &head, &tail); 1461 1462 /* Now arrange all ciphers by preference. */ 1463 1464 /* 1465 * Everything else being equal, prefer ephemeral ECDH over other key 1466 * exchange mechanisms. 1467 * For consistency, prefer ECDSA over RSA (though this only matters if the 1468 * server has both certificates, and is using the DEFAULT, or a client 1469 * preference). 1470 */ 1471 ssl_cipher_apply_rule(0, SSL_kECDHE, SSL_aECDSA, 0, 0, 0, 0, CIPHER_ADD, 1472 -1, &head, &tail); 1473 ssl_cipher_apply_rule(0, SSL_kECDHE, 0, 0, 0, 0, 0, CIPHER_ADD, -1, &head, 1474 &tail); 1475 ssl_cipher_apply_rule(0, SSL_kECDHE, 0, 0, 0, 0, 0, CIPHER_DEL, -1, &head, 1476 &tail); 1477 1478 /* Within each strength group, we prefer GCM over CHACHA... */ 1479 ssl_cipher_apply_rule(0, 0, 0, SSL_AESGCM, 0, 0, 0, CIPHER_ADD, -1, 1480 &head, &tail); 1481 ssl_cipher_apply_rule(0, 0, 0, SSL_CHACHA20, 0, 0, 0, CIPHER_ADD, -1, 1482 &head, &tail); 1483 1484 /* 1485 * ...and generally, our preferred cipher is AES. 1486 * Note that AEADs will be bumped to take preference after sorting by 1487 * strength. 1488 */ 1489 ssl_cipher_apply_rule(0, 0, 0, SSL_AES ^ SSL_AESGCM, 0, 0, 0, CIPHER_ADD, 1490 -1, &head, &tail); 1491 1492 /* Temporarily enable everything else for sorting */ 1493 ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_ADD, -1, &head, &tail); 1494 1495 /* Low priority for MD5 */ 1496 ssl_cipher_apply_rule(0, 0, 0, 0, SSL_MD5, 0, 0, CIPHER_ORD, -1, &head, 1497 &tail); 1498 1499 /* 1500 * Move anonymous ciphers to the end. Usually, these will remain 1501 * disabled. (For applications that allow them, they aren't too bad, but 1502 * we prefer authenticated ciphers.) 1503 */ 1504 ssl_cipher_apply_rule(0, 0, SSL_aNULL, 0, 0, 0, 0, CIPHER_ORD, -1, &head, 1505 &tail); 1506 1507 ssl_cipher_apply_rule(0, SSL_kRSA, 0, 0, 0, 0, 0, CIPHER_ORD, -1, &head, 1508 &tail); 1509 ssl_cipher_apply_rule(0, SSL_kPSK, 0, 0, 0, 0, 0, CIPHER_ORD, -1, &head, 1510 &tail); 1511 1512 /* RC4 is sort-of broken -- move to the end */ 1513 ssl_cipher_apply_rule(0, 0, 0, SSL_RC4, 0, 0, 0, CIPHER_ORD, -1, &head, 1514 &tail); 1515 1516 /* 1517 * Now sort by symmetric encryption strength. The above ordering remains 1518 * in force within each class 1519 */ 1520 if (!ssl_cipher_strength_sort(&head, &tail)) { 1521 OPENSSL_free(co_list); 1522 return NULL; 1523 } 1524 1525 /* 1526 * Partially overrule strength sort to prefer TLS 1.2 ciphers/PRFs. 1527 */ 1528 ssl_cipher_apply_rule(0, 0, 0, 0, 0, TLS1_2_VERSION, 0, CIPHER_BUMP, -1, 1529 &head, &tail); 1530 1531 /* 1532 * Irrespective of strength, enforce the following order: 1533 * (EC)DHE + AEAD > (EC)DHE > rest of AEAD > rest. 1534 * Within each group, ciphers remain sorted by strength and previous 1535 * preference, i.e., 1536 * 1) ECDHE > DHE 1537 * 2) GCM > CHACHA 1538 * 3) AES > rest 1539 * 4) TLS 1.2 > legacy 1540 * 1541 * Because we now bump ciphers to the top of the list, we proceed in 1542 * reverse order of preference. 1543 */ 1544 ssl_cipher_apply_rule(0, 0, 0, 0, SSL_AEAD, 0, 0, CIPHER_BUMP, -1, 1545 &head, &tail); 1546 ssl_cipher_apply_rule(0, SSL_kDHE | SSL_kECDHE, 0, 0, 0, 0, 0, 1547 CIPHER_BUMP, -1, &head, &tail); 1548 ssl_cipher_apply_rule(0, SSL_kDHE | SSL_kECDHE, 0, 0, SSL_AEAD, 0, 0, 1549 CIPHER_BUMP, -1, &head, &tail); 1550 1551 /* Now disable everything (maintaining the ordering!) */ 1552 ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_DEL, -1, &head, &tail); 1553 1554 /* 1555 * We also need cipher aliases for selecting based on the rule_str. 1556 * There might be two types of entries in the rule_str: 1) names 1557 * of ciphers themselves 2) aliases for groups of ciphers. 1558 * For 1) we need the available ciphers and for 2) the cipher 1559 * groups of cipher_aliases added together in one list (otherwise 1560 * we would be happy with just the cipher_aliases table). 1561 */ 1562 num_of_group_aliases = OSSL_NELEM(cipher_aliases); 1563 num_of_alias_max = num_of_ciphers + num_of_group_aliases + 1; 1564 ca_list = OPENSSL_malloc(sizeof(*ca_list) * num_of_alias_max); 1565 if (ca_list == NULL) { 1566 OPENSSL_free(co_list); 1567 return NULL; /* Failure */ 1568 } 1569 ssl_cipher_collect_aliases(ca_list, num_of_group_aliases, 1570 disabled_mkey, disabled_auth, disabled_enc, 1571 disabled_mac, head); 1572 1573 /* 1574 * If the rule_string begins with DEFAULT, apply the default rule 1575 * before using the (possibly available) additional rules. 1576 */ 1577 ok = 1; 1578 rule_p = rule_str; 1579 if (HAS_PREFIX(rule_str, "DEFAULT")) { 1580 ok = ssl_cipher_process_rulestr(OSSL_default_cipher_list(), 1581 &head, &tail, ca_list, c); 1582 rule_p += 7; 1583 if (*rule_p == ':') 1584 rule_p++; 1585 } 1586 1587 if (ok && (rule_p[0] != '\0')) 1588 ok = ssl_cipher_process_rulestr(rule_p, &head, &tail, ca_list, c); 1589 1590 OPENSSL_free(ca_list); /* Not needed anymore */ 1591 1592 if (!ok) { /* Rule processing failure */ 1593 OPENSSL_free(co_list); 1594 return NULL; 1595 } 1596 1597 /* 1598 * Allocate new "cipherstack" for the result, return with error 1599 * if we cannot get one. 1600 */ 1601 if ((cipherstack = sk_SSL_CIPHER_new_null()) == NULL) { 1602 OPENSSL_free(co_list); 1603 return NULL; 1604 } 1605 1606 /* Add TLSv1.3 ciphers first - we always prefer those if possible */ 1607 for (i = 0; i < sk_SSL_CIPHER_num(tls13_ciphersuites); i++) { 1608 const SSL_CIPHER *sslc = sk_SSL_CIPHER_value(tls13_ciphersuites, i); 1609 1610 /* Don't include any TLSv1.3 ciphers that are disabled */ 1611 if ((sslc->algorithm_enc & disabled_enc) != 0 1612 || (ssl_cipher_table_mac[sslc->algorithm2 1613 & SSL_HANDSHAKE_MAC_MASK] 1614 .mask 1615 & ctx->disabled_mac_mask) 1616 != 0) { 1617 sk_SSL_CIPHER_delete(tls13_ciphersuites, i); 1618 i--; 1619 continue; 1620 } 1621 1622 if (!sk_SSL_CIPHER_push(cipherstack, sslc)) { 1623 OPENSSL_free(co_list); 1624 sk_SSL_CIPHER_free(cipherstack); 1625 return NULL; 1626 } 1627 } 1628 1629 OSSL_TRACE_BEGIN(TLS_CIPHER) 1630 { 1631 BIO_printf(trc_out, "cipher selection:\n"); 1632 } 1633 /* 1634 * The cipher selection for the list is done. The ciphers are added 1635 * to the resulting precedence to the STACK_OF(SSL_CIPHER). 1636 */ 1637 for (curr = head; curr != NULL; curr = curr->next) { 1638 if (curr->active) { 1639 if (!sk_SSL_CIPHER_push(cipherstack, curr->cipher)) { 1640 OPENSSL_free(co_list); 1641 sk_SSL_CIPHER_free(cipherstack); 1642 OSSL_TRACE_CANCEL(TLS_CIPHER); 1643 return NULL; 1644 } 1645 if (trc_out != NULL) 1646 BIO_printf(trc_out, "<%s>\n", curr->cipher->name); 1647 } 1648 } 1649 OPENSSL_free(co_list); /* Not needed any longer */ 1650 OSSL_TRACE_END(TLS_CIPHER); 1651 1652 if (!update_cipher_list_by_id(cipher_list_by_id, cipherstack)) { 1653 sk_SSL_CIPHER_free(cipherstack); 1654 return NULL; 1655 } 1656 sk_SSL_CIPHER_free(*cipher_list); 1657 *cipher_list = cipherstack; 1658 1659 return cipherstack; 1660 } 1661 1662 char *SSL_CIPHER_description(const SSL_CIPHER *cipher, char *buf, int len) 1663 { 1664 const char *ver; 1665 const char *kx, *au, *enc, *mac; 1666 uint32_t alg_mkey, alg_auth, alg_enc, alg_mac; 1667 static const char *const format = "%-30s %-7s Kx=%-8s Au=%-5s Enc=%-22s Mac=%-4s\n"; 1668 1669 if (buf == NULL) { 1670 len = 128; 1671 if ((buf = OPENSSL_malloc(len)) == NULL) 1672 return NULL; 1673 } else if (len < 128) { 1674 return NULL; 1675 } 1676 1677 alg_mkey = cipher->algorithm_mkey; 1678 alg_auth = cipher->algorithm_auth; 1679 alg_enc = cipher->algorithm_enc; 1680 alg_mac = cipher->algorithm_mac; 1681 1682 ver = ssl_protocol_to_string(cipher->min_tls); 1683 1684 switch (alg_mkey) { 1685 case SSL_kRSA: 1686 kx = "RSA"; 1687 break; 1688 case SSL_kDHE: 1689 kx = "DH"; 1690 break; 1691 case SSL_kECDHE: 1692 kx = "ECDH"; 1693 break; 1694 case SSL_kPSK: 1695 kx = "PSK"; 1696 break; 1697 case SSL_kRSAPSK: 1698 kx = "RSAPSK"; 1699 break; 1700 case SSL_kECDHEPSK: 1701 kx = "ECDHEPSK"; 1702 break; 1703 case SSL_kDHEPSK: 1704 kx = "DHEPSK"; 1705 break; 1706 case SSL_kSRP: 1707 kx = "SRP"; 1708 break; 1709 case SSL_kGOST: 1710 kx = "GOST"; 1711 break; 1712 case SSL_kGOST18: 1713 kx = "GOST18"; 1714 break; 1715 case SSL_kANY: 1716 kx = "any"; 1717 break; 1718 default: 1719 kx = "unknown"; 1720 } 1721 1722 switch (alg_auth) { 1723 case SSL_aRSA: 1724 au = "RSA"; 1725 break; 1726 case SSL_aDSS: 1727 au = "DSS"; 1728 break; 1729 case SSL_aNULL: 1730 au = "None"; 1731 break; 1732 case SSL_aECDSA: 1733 au = "ECDSA"; 1734 break; 1735 case SSL_aPSK: 1736 au = "PSK"; 1737 break; 1738 case SSL_aSRP: 1739 au = "SRP"; 1740 break; 1741 case SSL_aGOST01: 1742 au = "GOST01"; 1743 break; 1744 /* New GOST ciphersuites have both SSL_aGOST12 and SSL_aGOST01 bits */ 1745 case (SSL_aGOST12 | SSL_aGOST01): 1746 au = "GOST12"; 1747 break; 1748 case SSL_aANY: 1749 au = "any"; 1750 break; 1751 default: 1752 au = "unknown"; 1753 break; 1754 } 1755 1756 switch (alg_enc) { 1757 case SSL_DES: 1758 enc = "DES(56)"; 1759 break; 1760 case SSL_3DES: 1761 enc = "3DES(168)"; 1762 break; 1763 case SSL_RC4: 1764 enc = "RC4(128)"; 1765 break; 1766 case SSL_RC2: 1767 enc = "RC2(128)"; 1768 break; 1769 case SSL_IDEA: 1770 enc = "IDEA(128)"; 1771 break; 1772 case SSL_eNULL: 1773 enc = "None"; 1774 break; 1775 case SSL_AES128: 1776 enc = "AES(128)"; 1777 break; 1778 case SSL_AES256: 1779 enc = "AES(256)"; 1780 break; 1781 case SSL_AES128GCM: 1782 enc = "AESGCM(128)"; 1783 break; 1784 case SSL_AES256GCM: 1785 enc = "AESGCM(256)"; 1786 break; 1787 case SSL_AES128CCM: 1788 enc = "AESCCM(128)"; 1789 break; 1790 case SSL_AES256CCM: 1791 enc = "AESCCM(256)"; 1792 break; 1793 case SSL_AES128CCM8: 1794 enc = "AESCCM8(128)"; 1795 break; 1796 case SSL_AES256CCM8: 1797 enc = "AESCCM8(256)"; 1798 break; 1799 case SSL_CAMELLIA128: 1800 enc = "Camellia(128)"; 1801 break; 1802 case SSL_CAMELLIA256: 1803 enc = "Camellia(256)"; 1804 break; 1805 case SSL_ARIA128GCM: 1806 enc = "ARIAGCM(128)"; 1807 break; 1808 case SSL_ARIA256GCM: 1809 enc = "ARIAGCM(256)"; 1810 break; 1811 case SSL_SEED: 1812 enc = "SEED(128)"; 1813 break; 1814 case SSL_eGOST2814789CNT: 1815 case SSL_eGOST2814789CNT12: 1816 enc = "GOST89(256)"; 1817 break; 1818 case SSL_MAGMA: 1819 enc = "MAGMA"; 1820 break; 1821 case SSL_KUZNYECHIK: 1822 enc = "KUZNYECHIK"; 1823 break; 1824 case SSL_CHACHA20POLY1305: 1825 enc = "CHACHA20/POLY1305(256)"; 1826 break; 1827 default: 1828 enc = "unknown"; 1829 break; 1830 } 1831 1832 switch (alg_mac) { 1833 case SSL_MD5: 1834 mac = "MD5"; 1835 break; 1836 case SSL_SHA1: 1837 mac = "SHA1"; 1838 break; 1839 case SSL_SHA256: 1840 mac = "SHA256"; 1841 break; 1842 case SSL_SHA384: 1843 mac = "SHA384"; 1844 break; 1845 case SSL_AEAD: 1846 mac = "AEAD"; 1847 break; 1848 case SSL_GOST89MAC: 1849 case SSL_GOST89MAC12: 1850 mac = "GOST89"; 1851 break; 1852 case SSL_GOST94: 1853 mac = "GOST94"; 1854 break; 1855 case SSL_GOST12_256: 1856 case SSL_GOST12_512: 1857 mac = "GOST2012"; 1858 break; 1859 default: 1860 mac = "unknown"; 1861 break; 1862 } 1863 1864 BIO_snprintf(buf, len, format, cipher->name, ver, kx, au, enc, mac); 1865 1866 return buf; 1867 } 1868 1869 const char *SSL_CIPHER_get_version(const SSL_CIPHER *c) 1870 { 1871 if (c == NULL) 1872 return "(NONE)"; 1873 1874 /* 1875 * Backwards-compatibility crutch. In almost all contexts we report TLS 1876 * 1.0 as "TLSv1", but for ciphers we report "TLSv1.0". 1877 */ 1878 if (c->min_tls == TLS1_VERSION) 1879 return "TLSv1.0"; 1880 return ssl_protocol_to_string(c->min_tls); 1881 } 1882 1883 /* return the actual cipher being used */ 1884 const char *SSL_CIPHER_get_name(const SSL_CIPHER *c) 1885 { 1886 if (c != NULL) 1887 return c->name; 1888 return "(NONE)"; 1889 } 1890 1891 /* return the actual cipher being used in RFC standard name */ 1892 const char *SSL_CIPHER_standard_name(const SSL_CIPHER *c) 1893 { 1894 if (c != NULL) 1895 return c->stdname; 1896 return "(NONE)"; 1897 } 1898 1899 /* return the OpenSSL name based on given RFC standard name */ 1900 const char *OPENSSL_cipher_name(const char *stdname) 1901 { 1902 const SSL_CIPHER *c; 1903 1904 if (stdname == NULL) 1905 return "(NONE)"; 1906 c = ssl3_get_cipher_by_std_name(stdname); 1907 return SSL_CIPHER_get_name(c); 1908 } 1909 1910 /* number of bits for symmetric cipher */ 1911 int SSL_CIPHER_get_bits(const SSL_CIPHER *c, int *alg_bits) 1912 { 1913 int ret = 0; 1914 1915 if (c != NULL) { 1916 if (alg_bits != NULL) 1917 *alg_bits = (int)c->alg_bits; 1918 ret = (int)c->strength_bits; 1919 } 1920 return ret; 1921 } 1922 1923 uint32_t SSL_CIPHER_get_id(const SSL_CIPHER *c) 1924 { 1925 return c->id; 1926 } 1927 1928 uint16_t SSL_CIPHER_get_protocol_id(const SSL_CIPHER *c) 1929 { 1930 return c->id & 0xFFFF; 1931 } 1932 1933 SSL_COMP *ssl3_comp_find(STACK_OF(SSL_COMP) *sk, int n) 1934 { 1935 SSL_COMP *ctmp; 1936 SSL_COMP srch_key; 1937 int i; 1938 1939 if ((n == 0) || (sk == NULL)) 1940 return NULL; 1941 srch_key.id = n; 1942 i = sk_SSL_COMP_find(sk, &srch_key); 1943 if (i >= 0) 1944 ctmp = sk_SSL_COMP_value(sk, i); 1945 else 1946 ctmp = NULL; 1947 1948 return ctmp; 1949 } 1950 1951 #ifdef OPENSSL_NO_COMP 1952 STACK_OF(SSL_COMP) *SSL_COMP_get_compression_methods(void) 1953 { 1954 return NULL; 1955 } 1956 1957 STACK_OF(SSL_COMP) *SSL_COMP_set0_compression_methods(STACK_OF(SSL_COMP) 1958 *meths) 1959 { 1960 return meths; 1961 } 1962 1963 int SSL_COMP_add_compression_method(int id, COMP_METHOD *cm) 1964 { 1965 return 1; 1966 } 1967 1968 #else 1969 STACK_OF(SSL_COMP) *SSL_COMP_get_compression_methods(void) 1970 { 1971 STACK_OF(SSL_COMP) **rv; 1972 1973 rv = (STACK_OF(SSL_COMP) **)OSSL_LIB_CTX_get_data(NULL, 1974 OSSL_LIB_CTX_COMP_METHODS); 1975 if (rv != NULL) 1976 return *rv; 1977 else 1978 return NULL; 1979 } 1980 1981 STACK_OF(SSL_COMP) *SSL_COMP_set0_compression_methods(STACK_OF(SSL_COMP) 1982 *meths) 1983 { 1984 STACK_OF(SSL_COMP) **comp_methods; 1985 STACK_OF(SSL_COMP) *old_meths; 1986 1987 comp_methods = (STACK_OF(SSL_COMP) **)OSSL_LIB_CTX_get_data(NULL, 1988 OSSL_LIB_CTX_COMP_METHODS); 1989 if (comp_methods == NULL) { 1990 old_meths = meths; 1991 } else { 1992 old_meths = *comp_methods; 1993 *comp_methods = meths; 1994 } 1995 1996 return old_meths; 1997 } 1998 1999 int SSL_COMP_add_compression_method(int id, COMP_METHOD *cm) 2000 { 2001 STACK_OF(SSL_COMP) *comp_methods; 2002 SSL_COMP *comp; 2003 2004 comp_methods = SSL_COMP_get_compression_methods(); 2005 2006 if (comp_methods == NULL) 2007 return 1; 2008 2009 if (cm == NULL || COMP_get_type(cm) == NID_undef) 2010 return 1; 2011 2012 /*- 2013 * According to draft-ietf-tls-compression-04.txt, the 2014 * compression number ranges should be the following: 2015 * 2016 * 0 to 63: methods defined by the IETF 2017 * 64 to 192: external party methods assigned by IANA 2018 * 193 to 255: reserved for private use 2019 */ 2020 if (id < 193 || id > 255) { 2021 ERR_raise(ERR_LIB_SSL, SSL_R_COMPRESSION_ID_NOT_WITHIN_PRIVATE_RANGE); 2022 return 1; 2023 } 2024 2025 comp = OPENSSL_malloc(sizeof(*comp)); 2026 if (comp == NULL) 2027 return 1; 2028 2029 comp->id = id; 2030 if (sk_SSL_COMP_find(comp_methods, comp) >= 0) { 2031 OPENSSL_free(comp); 2032 ERR_raise(ERR_LIB_SSL, SSL_R_DUPLICATE_COMPRESSION_ID); 2033 return 1; 2034 } 2035 if (!sk_SSL_COMP_push(comp_methods, comp)) { 2036 OPENSSL_free(comp); 2037 ERR_raise(ERR_LIB_SSL, ERR_R_CRYPTO_LIB); 2038 return 1; 2039 } 2040 2041 return 0; 2042 } 2043 #endif 2044 2045 const char *SSL_COMP_get_name(const COMP_METHOD *comp) 2046 { 2047 #ifndef OPENSSL_NO_COMP 2048 return comp ? COMP_get_name(comp) : NULL; 2049 #else 2050 return NULL; 2051 #endif 2052 } 2053 2054 const char *SSL_COMP_get0_name(const SSL_COMP *comp) 2055 { 2056 #ifndef OPENSSL_NO_COMP 2057 return comp->name; 2058 #else 2059 return NULL; 2060 #endif 2061 } 2062 2063 int SSL_COMP_get_id(const SSL_COMP *comp) 2064 { 2065 #ifndef OPENSSL_NO_COMP 2066 return comp->id; 2067 #else 2068 return -1; 2069 #endif 2070 } 2071 2072 const SSL_CIPHER *ssl_get_cipher_by_char(SSL_CONNECTION *s, 2073 const unsigned char *ptr, 2074 int all) 2075 { 2076 const SSL_CIPHER *c = SSL_CONNECTION_GET_SSL(s)->method->get_cipher_by_char(ptr); 2077 2078 if (c == NULL || (!all && c->valid == 0)) 2079 return NULL; 2080 return c; 2081 } 2082 2083 const SSL_CIPHER *SSL_CIPHER_find(SSL *ssl, const unsigned char *ptr) 2084 { 2085 return ssl->method->get_cipher_by_char(ptr); 2086 } 2087 2088 int SSL_CIPHER_get_cipher_nid(const SSL_CIPHER *c) 2089 { 2090 int i; 2091 if (c == NULL) 2092 return NID_undef; 2093 i = ssl_cipher_info_lookup(ssl_cipher_table_cipher, c->algorithm_enc); 2094 if (i == -1) 2095 return NID_undef; 2096 return ssl_cipher_table_cipher[i].nid; 2097 } 2098 2099 int SSL_CIPHER_get_digest_nid(const SSL_CIPHER *c) 2100 { 2101 int i = ssl_cipher_info_lookup(ssl_cipher_table_mac, c->algorithm_mac); 2102 2103 if (i == -1) 2104 return NID_undef; 2105 return ssl_cipher_table_mac[i].nid; 2106 } 2107 2108 int SSL_CIPHER_get_kx_nid(const SSL_CIPHER *c) 2109 { 2110 int i = ssl_cipher_info_lookup(ssl_cipher_table_kx, c->algorithm_mkey); 2111 2112 if (i == -1) 2113 return NID_undef; 2114 return ssl_cipher_table_kx[i].nid; 2115 } 2116 2117 int SSL_CIPHER_get_auth_nid(const SSL_CIPHER *c) 2118 { 2119 int i = ssl_cipher_info_lookup(ssl_cipher_table_auth, c->algorithm_auth); 2120 2121 if (i == -1) 2122 return NID_undef; 2123 return ssl_cipher_table_auth[i].nid; 2124 } 2125 2126 int ssl_get_md_idx(int md_nid) 2127 { 2128 int i; 2129 2130 for (i = 0; i < SSL_MD_NUM_IDX; i++) { 2131 if (md_nid == ssl_cipher_table_mac[i].nid) 2132 return i; 2133 } 2134 return -1; 2135 } 2136 2137 const EVP_MD *SSL_CIPHER_get_handshake_digest(const SSL_CIPHER *c) 2138 { 2139 int idx = c->algorithm2 & SSL_HANDSHAKE_MAC_MASK; 2140 2141 if (idx < 0 || idx >= SSL_MD_NUM_IDX) 2142 return NULL; 2143 return EVP_get_digestbynid(ssl_cipher_table_mac[idx].nid); 2144 } 2145 2146 int SSL_CIPHER_is_aead(const SSL_CIPHER *c) 2147 { 2148 return (c->algorithm_mac & SSL_AEAD) ? 1 : 0; 2149 } 2150 2151 int ssl_cipher_get_overhead(const SSL_CIPHER *c, size_t *mac_overhead, 2152 size_t *int_overhead, size_t *blocksize, 2153 size_t *ext_overhead) 2154 { 2155 int mac = 0, in = 0, blk = 0, out = 0; 2156 2157 /* Some hard-coded numbers for the CCM/Poly1305 MAC overhead 2158 * because there are no handy #defines for those. */ 2159 if (c->algorithm_enc & (SSL_AESGCM | SSL_ARIAGCM)) { 2160 out = EVP_GCM_TLS_EXPLICIT_IV_LEN + EVP_GCM_TLS_TAG_LEN; 2161 } else if (c->algorithm_enc & (SSL_AES128CCM | SSL_AES256CCM)) { 2162 out = EVP_CCM_TLS_EXPLICIT_IV_LEN + 16; 2163 } else if (c->algorithm_enc & (SSL_AES128CCM8 | SSL_AES256CCM8)) { 2164 out = EVP_CCM_TLS_EXPLICIT_IV_LEN + 8; 2165 } else if (c->algorithm_enc & SSL_CHACHA20POLY1305) { 2166 out = 16; 2167 } else if (c->algorithm_mac & SSL_AEAD) { 2168 /* We're supposed to have handled all the AEAD modes above */ 2169 return 0; 2170 } else { 2171 /* Non-AEAD modes. Calculate MAC/cipher overhead separately */ 2172 int digest_nid = SSL_CIPHER_get_digest_nid(c); 2173 const EVP_MD *e_md = EVP_get_digestbynid(digest_nid); 2174 2175 if (e_md == NULL) 2176 return 0; 2177 2178 mac = EVP_MD_get_size(e_md); 2179 if (mac <= 0) 2180 return 0; 2181 if (c->algorithm_enc != SSL_eNULL) { 2182 int cipher_nid = SSL_CIPHER_get_cipher_nid(c); 2183 const EVP_CIPHER *e_ciph = EVP_get_cipherbynid(cipher_nid); 2184 2185 /* If it wasn't AEAD or SSL_eNULL, we expect it to be a 2186 known CBC cipher. */ 2187 if (e_ciph == NULL || EVP_CIPHER_get_mode(e_ciph) != EVP_CIPH_CBC_MODE) 2188 return 0; 2189 2190 in = 1; /* padding length byte */ 2191 out = EVP_CIPHER_get_iv_length(e_ciph); 2192 if (out < 0) 2193 return 0; 2194 blk = EVP_CIPHER_get_block_size(e_ciph); 2195 if (blk <= 0) 2196 return 0; 2197 } 2198 } 2199 2200 *mac_overhead = (size_t)mac; 2201 *int_overhead = (size_t)in; 2202 *blocksize = (size_t)blk; 2203 *ext_overhead = (size_t)out; 2204 2205 return 1; 2206 } 2207 2208 int ssl_cert_is_disabled(SSL_CTX *ctx, size_t idx) 2209 { 2210 const SSL_CERT_LOOKUP *cl; 2211 2212 /* A provider-loaded key type is always enabled */ 2213 if (idx >= SSL_PKEY_NUM) 2214 return 0; 2215 2216 cl = ssl_cert_lookup_by_idx(idx, ctx); 2217 if (cl == NULL || (cl->amask & ctx->disabled_auth_mask) != 0) 2218 return 1; 2219 return 0; 2220 } 2221 2222 /* 2223 * Default list of TLSv1.2 (and earlier) ciphers 2224 * SSL_DEFAULT_CIPHER_LIST deprecated in 3.0.0 2225 * Update both macro and function simultaneously 2226 */ 2227 const char *OSSL_default_cipher_list(void) 2228 { 2229 return "ALL:!COMPLEMENTOFDEFAULT:!eNULL"; 2230 } 2231 2232 /* 2233 * Default list of TLSv1.3 (and later) ciphers 2234 * TLS_DEFAULT_CIPHERSUITES deprecated in 3.0.0 2235 * Update both macro and function simultaneously 2236 */ 2237 const char *OSSL_default_ciphersuites(void) 2238 { 2239 return "TLS_AES_256_GCM_SHA384:" 2240 "TLS_CHACHA20_POLY1305_SHA256:" 2241 "TLS_AES_128_GCM_SHA256"; 2242 } 2243
Indexes created Fri Aug 21 00:24:51 UTC 2026