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- /*
- * Copyright 1995-2024 The OpenSSL Project Authors. All Rights Reserved.
- * Copyright (c) 2002, Oracle and/or its affiliates. All rights reserved
- * Copyright 2005 Nokia. All rights reserved.
- *
- * Licensed under the Apache License 2.0 (the "License"). You may not use
- * this file except in compliance with the License. You can obtain a copy
- * in the file LICENSE in the source distribution or at
- * https://www.openssl.org/source/license.html
- */
- #include <stdio.h>
- #include <ctype.h>
- #include <openssl/objects.h>
- #include <openssl/comp.h>
- #include <openssl/engine.h>
- #include <openssl/crypto.h>
- #include <openssl/conf.h>
- #include <openssl/trace.h>
- #include "internal/nelem.h"
- #include "ssl_local.h"
- #include "internal/thread_once.h"
- #include "internal/cryptlib.h"
- #include "internal/ssl_unwrap.h"
- /* NB: make sure indices in these tables match values above */
- typedef struct {
- uint32_t mask;
- int nid;
- } ssl_cipher_table;
- /* Table of NIDs for each cipher */
- static const ssl_cipher_table ssl_cipher_table_cipher[SSL_ENC_NUM_IDX] = {
- {SSL_DES, NID_des_cbc}, /* SSL_ENC_DES_IDX 0 */
- {SSL_3DES, NID_des_ede3_cbc}, /* SSL_ENC_3DES_IDX 1 */
- {SSL_RC4, NID_rc4}, /* SSL_ENC_RC4_IDX 2 */
- {SSL_RC2, NID_rc2_cbc}, /* SSL_ENC_RC2_IDX 3 */
- {SSL_IDEA, NID_idea_cbc}, /* SSL_ENC_IDEA_IDX 4 */
- {SSL_eNULL, NID_undef}, /* SSL_ENC_NULL_IDX 5 */
- {SSL_AES128, NID_aes_128_cbc}, /* SSL_ENC_AES128_IDX 6 */
- {SSL_AES256, NID_aes_256_cbc}, /* SSL_ENC_AES256_IDX 7 */
- {SSL_CAMELLIA128, NID_camellia_128_cbc}, /* SSL_ENC_CAMELLIA128_IDX 8 */
- {SSL_CAMELLIA256, NID_camellia_256_cbc}, /* SSL_ENC_CAMELLIA256_IDX 9 */
- {SSL_eGOST2814789CNT, NID_gost89_cnt}, /* SSL_ENC_GOST89_IDX 10 */
- {SSL_SEED, NID_seed_cbc}, /* SSL_ENC_SEED_IDX 11 */
- {SSL_AES128GCM, NID_aes_128_gcm}, /* SSL_ENC_AES128GCM_IDX 12 */
- {SSL_AES256GCM, NID_aes_256_gcm}, /* SSL_ENC_AES256GCM_IDX 13 */
- {SSL_AES128CCM, NID_aes_128_ccm}, /* SSL_ENC_AES128CCM_IDX 14 */
- {SSL_AES256CCM, NID_aes_256_ccm}, /* SSL_ENC_AES256CCM_IDX 15 */
- {SSL_AES128CCM8, NID_aes_128_ccm}, /* SSL_ENC_AES128CCM8_IDX 16 */
- {SSL_AES256CCM8, NID_aes_256_ccm}, /* SSL_ENC_AES256CCM8_IDX 17 */
- {SSL_eGOST2814789CNT12, NID_gost89_cnt_12}, /* SSL_ENC_GOST8912_IDX 18 */
- {SSL_CHACHA20POLY1305, NID_chacha20_poly1305}, /* SSL_ENC_CHACHA_IDX 19 */
- {SSL_ARIA128GCM, NID_aria_128_gcm}, /* SSL_ENC_ARIA128GCM_IDX 20 */
- {SSL_ARIA256GCM, NID_aria_256_gcm}, /* SSL_ENC_ARIA256GCM_IDX 21 */
- {SSL_MAGMA, NID_magma_ctr_acpkm}, /* SSL_ENC_MAGMA_IDX */
- {SSL_KUZNYECHIK, NID_kuznyechik_ctr_acpkm}, /* SSL_ENC_KUZNYECHIK_IDX */
- };
- #define SSL_COMP_NULL_IDX 0
- #define SSL_COMP_ZLIB_IDX 1
- #define SSL_COMP_NUM_IDX 2
- static STACK_OF(SSL_COMP) *ssl_comp_methods = NULL;
- #ifndef OPENSSL_NO_COMP
- static CRYPTO_ONCE ssl_load_builtin_comp_once = CRYPTO_ONCE_STATIC_INIT;
- #endif
- /* NB: make sure indices in this table matches values above */
- static const ssl_cipher_table ssl_cipher_table_mac[SSL_MD_NUM_IDX] = {
- {SSL_MD5, NID_md5}, /* SSL_MD_MD5_IDX 0 */
- {SSL_SHA1, NID_sha1}, /* SSL_MD_SHA1_IDX 1 */
- {SSL_GOST94, NID_id_GostR3411_94}, /* SSL_MD_GOST94_IDX 2 */
- {SSL_GOST89MAC, NID_id_Gost28147_89_MAC}, /* SSL_MD_GOST89MAC_IDX 3 */
- {SSL_SHA256, NID_sha256}, /* SSL_MD_SHA256_IDX 4 */
- {SSL_SHA384, NID_sha384}, /* SSL_MD_SHA384_IDX 5 */
- {SSL_GOST12_256, NID_id_GostR3411_2012_256}, /* SSL_MD_GOST12_256_IDX 6 */
- {SSL_GOST89MAC12, NID_gost_mac_12}, /* SSL_MD_GOST89MAC12_IDX 7 */
- {SSL_GOST12_512, NID_id_GostR3411_2012_512}, /* SSL_MD_GOST12_512_IDX 8 */
- {0, NID_md5_sha1}, /* SSL_MD_MD5_SHA1_IDX 9 */
- {0, NID_sha224}, /* SSL_MD_SHA224_IDX 10 */
- {0, NID_sha512}, /* SSL_MD_SHA512_IDX 11 */
- {SSL_MAGMAOMAC, NID_magma_mac}, /* sSL_MD_MAGMAOMAC_IDX */
- {SSL_KUZNYECHIKOMAC, NID_kuznyechik_mac} /* SSL_MD_KUZNYECHIKOMAC_IDX */
- };
- /* *INDENT-OFF* */
- static const ssl_cipher_table ssl_cipher_table_kx[] = {
- {SSL_kRSA, NID_kx_rsa},
- {SSL_kECDHE, NID_kx_ecdhe},
- {SSL_kDHE, NID_kx_dhe},
- {SSL_kECDHEPSK, NID_kx_ecdhe_psk},
- {SSL_kDHEPSK, NID_kx_dhe_psk},
- {SSL_kRSAPSK, NID_kx_rsa_psk},
- {SSL_kPSK, NID_kx_psk},
- {SSL_kSRP, NID_kx_srp},
- {SSL_kGOST, NID_kx_gost},
- {SSL_kGOST18, NID_kx_gost18},
- {SSL_kANY, NID_kx_any}
- };
- static const ssl_cipher_table ssl_cipher_table_auth[] = {
- {SSL_aRSA, NID_auth_rsa},
- {SSL_aECDSA, NID_auth_ecdsa},
- {SSL_aPSK, NID_auth_psk},
- {SSL_aDSS, NID_auth_dss},
- {SSL_aGOST01, NID_auth_gost01},
- {SSL_aGOST12, NID_auth_gost12},
- {SSL_aSRP, NID_auth_srp},
- {SSL_aNULL, NID_auth_null},
- {SSL_aANY, NID_auth_any}
- };
- /* *INDENT-ON* */
- /* Utility function for table lookup */
- static int ssl_cipher_info_find(const ssl_cipher_table *table,
- size_t table_cnt, uint32_t mask)
- {
- size_t i;
- for (i = 0; i < table_cnt; i++, table++) {
- if (table->mask == mask)
- return (int)i;
- }
- return -1;
- }
- #define ssl_cipher_info_lookup(table, x) \
- ssl_cipher_info_find(table, OSSL_NELEM(table), x)
- /*
- * PKEY_TYPE for GOST89MAC is known in advance, but, because implementation
- * is engine-provided, we'll fill it only if corresponding EVP_PKEY_METHOD is
- * found
- */
- static const int default_mac_pkey_id[SSL_MD_NUM_IDX] = {
- /* MD5, SHA, GOST94, MAC89 */
- EVP_PKEY_HMAC, EVP_PKEY_HMAC, EVP_PKEY_HMAC, NID_undef,
- /* SHA256, SHA384, GOST2012_256, MAC89-12 */
- EVP_PKEY_HMAC, EVP_PKEY_HMAC, EVP_PKEY_HMAC, NID_undef,
- /* GOST2012_512 */
- EVP_PKEY_HMAC,
- /* MD5/SHA1, SHA224, SHA512, MAGMAOMAC, KUZNYECHIKOMAC */
- NID_undef, NID_undef, NID_undef, NID_undef, NID_undef
- };
- #define CIPHER_ADD 1
- #define CIPHER_KILL 2
- #define CIPHER_DEL 3
- #define CIPHER_ORD 4
- #define CIPHER_SPECIAL 5
- /*
- * Bump the ciphers to the top of the list.
- * This rule isn't currently supported by the public cipherstring API.
- */
- #define CIPHER_BUMP 6
- typedef struct cipher_order_st {
- const SSL_CIPHER *cipher;
- int active;
- int dead;
- struct cipher_order_st *next, *prev;
- } CIPHER_ORDER;
- static const SSL_CIPHER cipher_aliases[] = {
- /* "ALL" doesn't include eNULL (must be specifically enabled) */
- {0, SSL_TXT_ALL, NULL, 0, 0, 0, ~SSL_eNULL},
- /* "COMPLEMENTOFALL" */
- {0, SSL_TXT_CMPALL, NULL, 0, 0, 0, SSL_eNULL},
- /*
- * "COMPLEMENTOFDEFAULT" (does *not* include ciphersuites not found in
- * ALL!)
- */
- {0, SSL_TXT_CMPDEF, NULL, 0, 0, 0, 0, 0, 0, 0, 0, 0, SSL_NOT_DEFAULT},
- /*
- * key exchange aliases (some of those using only a single bit here
- * combine multiple key exchange algs according to the RFCs, e.g. kDHE
- * combines DHE_DSS and DHE_RSA)
- */
- {0, SSL_TXT_kRSA, NULL, 0, SSL_kRSA},
- {0, SSL_TXT_kEDH, NULL, 0, SSL_kDHE},
- {0, SSL_TXT_kDHE, NULL, 0, SSL_kDHE},
- {0, SSL_TXT_DH, NULL, 0, SSL_kDHE},
- {0, SSL_TXT_kEECDH, NULL, 0, SSL_kECDHE},
- {0, SSL_TXT_kECDHE, NULL, 0, SSL_kECDHE},
- {0, SSL_TXT_ECDH, NULL, 0, SSL_kECDHE},
- {0, SSL_TXT_kPSK, NULL, 0, SSL_kPSK},
- {0, SSL_TXT_kRSAPSK, NULL, 0, SSL_kRSAPSK},
- {0, SSL_TXT_kECDHEPSK, NULL, 0, SSL_kECDHEPSK},
- {0, SSL_TXT_kDHEPSK, NULL, 0, SSL_kDHEPSK},
- {0, SSL_TXT_kSRP, NULL, 0, SSL_kSRP},
- {0, SSL_TXT_kGOST, NULL, 0, SSL_kGOST},
- {0, SSL_TXT_kGOST18, NULL, 0, SSL_kGOST18},
- /* server authentication aliases */
- {0, SSL_TXT_aRSA, NULL, 0, 0, SSL_aRSA},
- {0, SSL_TXT_aDSS, NULL, 0, 0, SSL_aDSS},
- {0, SSL_TXT_DSS, NULL, 0, 0, SSL_aDSS},
- {0, SSL_TXT_aNULL, NULL, 0, 0, SSL_aNULL},
- {0, SSL_TXT_aECDSA, NULL, 0, 0, SSL_aECDSA},
- {0, SSL_TXT_ECDSA, NULL, 0, 0, SSL_aECDSA},
- {0, SSL_TXT_aPSK, NULL, 0, 0, SSL_aPSK},
- {0, SSL_TXT_aGOST01, NULL, 0, 0, SSL_aGOST01},
- {0, SSL_TXT_aGOST12, NULL, 0, 0, SSL_aGOST12},
- {0, SSL_TXT_aGOST, NULL, 0, 0, SSL_aGOST01 | SSL_aGOST12},
- {0, SSL_TXT_aSRP, NULL, 0, 0, SSL_aSRP},
- /* aliases combining key exchange and server authentication */
- {0, SSL_TXT_EDH, NULL, 0, SSL_kDHE, ~SSL_aNULL},
- {0, SSL_TXT_DHE, NULL, 0, SSL_kDHE, ~SSL_aNULL},
- {0, SSL_TXT_EECDH, NULL, 0, SSL_kECDHE, ~SSL_aNULL},
- {0, SSL_TXT_ECDHE, NULL, 0, SSL_kECDHE, ~SSL_aNULL},
- {0, SSL_TXT_NULL, NULL, 0, 0, 0, SSL_eNULL},
- {0, SSL_TXT_RSA, NULL, 0, SSL_kRSA, SSL_aRSA},
- {0, SSL_TXT_ADH, NULL, 0, SSL_kDHE, SSL_aNULL},
- {0, SSL_TXT_AECDH, NULL, 0, SSL_kECDHE, SSL_aNULL},
- {0, SSL_TXT_PSK, NULL, 0, SSL_PSK},
- {0, SSL_TXT_SRP, NULL, 0, SSL_kSRP},
- /* symmetric encryption aliases */
- {0, SSL_TXT_3DES, NULL, 0, 0, 0, SSL_3DES},
- {0, SSL_TXT_RC4, NULL, 0, 0, 0, SSL_RC4},
- {0, SSL_TXT_RC2, NULL, 0, 0, 0, SSL_RC2},
- {0, SSL_TXT_IDEA, NULL, 0, 0, 0, SSL_IDEA},
- {0, SSL_TXT_SEED, NULL, 0, 0, 0, SSL_SEED},
- {0, SSL_TXT_eNULL, NULL, 0, 0, 0, SSL_eNULL},
- {0, SSL_TXT_GOST, NULL, 0, 0, 0,
- SSL_eGOST2814789CNT | SSL_eGOST2814789CNT12 | SSL_MAGMA | SSL_KUZNYECHIK},
- {0, SSL_TXT_AES128, NULL, 0, 0, 0,
- SSL_AES128 | SSL_AES128GCM | SSL_AES128CCM | SSL_AES128CCM8},
- {0, SSL_TXT_AES256, NULL, 0, 0, 0,
- SSL_AES256 | SSL_AES256GCM | SSL_AES256CCM | SSL_AES256CCM8},
- {0, SSL_TXT_AES, NULL, 0, 0, 0, SSL_AES},
- {0, SSL_TXT_AES_GCM, NULL, 0, 0, 0, SSL_AES128GCM | SSL_AES256GCM},
- {0, SSL_TXT_AES_CCM, NULL, 0, 0, 0,
- SSL_AES128CCM | SSL_AES256CCM | SSL_AES128CCM8 | SSL_AES256CCM8},
- {0, SSL_TXT_AES_CCM_8, NULL, 0, 0, 0, SSL_AES128CCM8 | SSL_AES256CCM8},
- {0, SSL_TXT_CAMELLIA128, NULL, 0, 0, 0, SSL_CAMELLIA128},
- {0, SSL_TXT_CAMELLIA256, NULL, 0, 0, 0, SSL_CAMELLIA256},
- {0, SSL_TXT_CAMELLIA, NULL, 0, 0, 0, SSL_CAMELLIA},
- {0, SSL_TXT_CHACHA20, NULL, 0, 0, 0, SSL_CHACHA20},
- {0, SSL_TXT_GOST2012_GOST8912_GOST8912, NULL, 0, 0, 0, SSL_eGOST2814789CNT12},
- {0, SSL_TXT_ARIA, NULL, 0, 0, 0, SSL_ARIA},
- {0, SSL_TXT_ARIA_GCM, NULL, 0, 0, 0, SSL_ARIA128GCM | SSL_ARIA256GCM},
- {0, SSL_TXT_ARIA128, NULL, 0, 0, 0, SSL_ARIA128GCM},
- {0, SSL_TXT_ARIA256, NULL, 0, 0, 0, SSL_ARIA256GCM},
- {0, SSL_TXT_CBC, NULL, 0, 0, 0, SSL_CBC},
- /* MAC aliases */
- {0, SSL_TXT_MD5, NULL, 0, 0, 0, 0, SSL_MD5},
- {0, SSL_TXT_SHA1, NULL, 0, 0, 0, 0, SSL_SHA1},
- {0, SSL_TXT_SHA, NULL, 0, 0, 0, 0, SSL_SHA1},
- {0, SSL_TXT_GOST94, NULL, 0, 0, 0, 0, SSL_GOST94},
- {0, SSL_TXT_GOST89MAC, NULL, 0, 0, 0, 0, SSL_GOST89MAC | SSL_GOST89MAC12},
- {0, SSL_TXT_SHA256, NULL, 0, 0, 0, 0, SSL_SHA256},
- {0, SSL_TXT_SHA384, NULL, 0, 0, 0, 0, SSL_SHA384},
- {0, SSL_TXT_GOST12, NULL, 0, 0, 0, 0, SSL_GOST12_256},
- /* protocol version aliases */
- {0, SSL_TXT_SSLV3, NULL, 0, 0, 0, 0, 0, SSL3_VERSION},
- {0, SSL_TXT_TLSV1, NULL, 0, 0, 0, 0, 0, TLS1_VERSION},
- {0, "TLSv1.0", NULL, 0, 0, 0, 0, 0, TLS1_VERSION},
- {0, SSL_TXT_TLSV1_2, NULL, 0, 0, 0, 0, 0, TLS1_2_VERSION},
- /* strength classes */
- {0, SSL_TXT_LOW, NULL, 0, 0, 0, 0, 0, 0, 0, 0, 0, SSL_LOW},
- {0, SSL_TXT_MEDIUM, NULL, 0, 0, 0, 0, 0, 0, 0, 0, 0, SSL_MEDIUM},
- {0, SSL_TXT_HIGH, NULL, 0, 0, 0, 0, 0, 0, 0, 0, 0, SSL_HIGH},
- /* FIPS 140-2 approved ciphersuite */
- {0, SSL_TXT_FIPS, NULL, 0, 0, 0, ~SSL_eNULL, 0, 0, 0, 0, 0, SSL_FIPS},
- /* "EDH-" aliases to "DHE-" labels (for backward compatibility) */
- {0, SSL3_TXT_EDH_DSS_DES_192_CBC3_SHA, NULL, 0,
- SSL_kDHE, SSL_aDSS, SSL_3DES, SSL_SHA1, 0, 0, 0, 0, SSL_HIGH | SSL_FIPS},
- {0, SSL3_TXT_EDH_RSA_DES_192_CBC3_SHA, NULL, 0,
- SSL_kDHE, SSL_aRSA, SSL_3DES, SSL_SHA1, 0, 0, 0, 0, SSL_HIGH | SSL_FIPS},
- };
- /*
- * Search for public key algorithm with given name and return its pkey_id if
- * it is available. Otherwise return 0
- */
- #ifdef OPENSSL_NO_ENGINE
- static int get_optional_pkey_id(const char *pkey_name)
- {
- const EVP_PKEY_ASN1_METHOD *ameth;
- int pkey_id = 0;
- ameth = EVP_PKEY_asn1_find_str(NULL, pkey_name, -1);
- if (ameth && EVP_PKEY_asn1_get0_info(&pkey_id, NULL, NULL, NULL, NULL,
- ameth) > 0)
- return pkey_id;
- return 0;
- }
- #else
- static int get_optional_pkey_id(const char *pkey_name)
- {
- const EVP_PKEY_ASN1_METHOD *ameth;
- ENGINE *tmpeng = NULL;
- int pkey_id = 0;
- ameth = EVP_PKEY_asn1_find_str(&tmpeng, pkey_name, -1);
- if (ameth) {
- if (EVP_PKEY_asn1_get0_info(&pkey_id, NULL, NULL, NULL, NULL,
- ameth) <= 0)
- pkey_id = 0;
- }
- tls_engine_finish(tmpeng);
- return pkey_id;
- }
- #endif
- int ssl_load_ciphers(SSL_CTX *ctx)
- {
- size_t i;
- const ssl_cipher_table *t;
- EVP_KEYEXCH *kex = NULL;
- EVP_SIGNATURE *sig = NULL;
- ctx->disabled_enc_mask = 0;
- for (i = 0, t = ssl_cipher_table_cipher; i < SSL_ENC_NUM_IDX; i++, t++) {
- if (t->nid != NID_undef) {
- const EVP_CIPHER *cipher
- = ssl_evp_cipher_fetch(ctx->libctx, t->nid, ctx->propq);
- ctx->ssl_cipher_methods[i] = cipher;
- if (cipher == NULL)
- ctx->disabled_enc_mask |= t->mask;
- }
- }
- ctx->disabled_mac_mask = 0;
- for (i = 0, t = ssl_cipher_table_mac; i < SSL_MD_NUM_IDX; i++, t++) {
- const EVP_MD *md
- = ssl_evp_md_fetch(ctx->libctx, t->nid, ctx->propq);
- ctx->ssl_digest_methods[i] = md;
- if (md == NULL) {
- ctx->disabled_mac_mask |= t->mask;
- } else {
- int tmpsize = EVP_MD_get_size(md);
- if (!ossl_assert(tmpsize >= 0))
- return 0;
- ctx->ssl_mac_secret_size[i] = tmpsize;
- }
- }
- ctx->disabled_mkey_mask = 0;
- ctx->disabled_auth_mask = 0;
- /*
- * We ignore any errors from the fetches below. They are expected to fail
- * if these algorithms are not available.
- */
- ERR_set_mark();
- sig = EVP_SIGNATURE_fetch(ctx->libctx, "DSA", ctx->propq);
- if (sig == NULL)
- ctx->disabled_auth_mask |= SSL_aDSS;
- else
- EVP_SIGNATURE_free(sig);
- kex = EVP_KEYEXCH_fetch(ctx->libctx, "DH", ctx->propq);
- if (kex == NULL)
- ctx->disabled_mkey_mask |= SSL_kDHE | SSL_kDHEPSK;
- else
- EVP_KEYEXCH_free(kex);
- kex = EVP_KEYEXCH_fetch(ctx->libctx, "ECDH", ctx->propq);
- if (kex == NULL)
- ctx->disabled_mkey_mask |= SSL_kECDHE | SSL_kECDHEPSK;
- else
- EVP_KEYEXCH_free(kex);
- sig = EVP_SIGNATURE_fetch(ctx->libctx, "ECDSA", ctx->propq);
- if (sig == NULL)
- ctx->disabled_auth_mask |= SSL_aECDSA;
- else
- EVP_SIGNATURE_free(sig);
- ERR_pop_to_mark();
- #ifdef OPENSSL_NO_PSK
- ctx->disabled_mkey_mask |= SSL_PSK;
- ctx->disabled_auth_mask |= SSL_aPSK;
- #endif
- #ifdef OPENSSL_NO_SRP
- ctx->disabled_mkey_mask |= SSL_kSRP;
- #endif
- /*
- * Check for presence of GOST 34.10 algorithms, and if they are not
- * present, disable appropriate auth and key exchange
- */
- memcpy(ctx->ssl_mac_pkey_id, default_mac_pkey_id,
- sizeof(ctx->ssl_mac_pkey_id));
- ctx->ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX] =
- get_optional_pkey_id(SN_id_Gost28147_89_MAC);
- if (ctx->ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX])
- ctx->ssl_mac_secret_size[SSL_MD_GOST89MAC_IDX] = 32;
- else
- ctx->disabled_mac_mask |= SSL_GOST89MAC;
- ctx->ssl_mac_pkey_id[SSL_MD_GOST89MAC12_IDX] =
- get_optional_pkey_id(SN_gost_mac_12);
- if (ctx->ssl_mac_pkey_id[SSL_MD_GOST89MAC12_IDX])
- ctx->ssl_mac_secret_size[SSL_MD_GOST89MAC12_IDX] = 32;
- else
- ctx->disabled_mac_mask |= SSL_GOST89MAC12;
- ctx->ssl_mac_pkey_id[SSL_MD_MAGMAOMAC_IDX] =
- get_optional_pkey_id(SN_magma_mac);
- if (ctx->ssl_mac_pkey_id[SSL_MD_MAGMAOMAC_IDX])
- ctx->ssl_mac_secret_size[SSL_MD_MAGMAOMAC_IDX] = 32;
- else
- ctx->disabled_mac_mask |= SSL_MAGMAOMAC;
- ctx->ssl_mac_pkey_id[SSL_MD_KUZNYECHIKOMAC_IDX] =
- get_optional_pkey_id(SN_kuznyechik_mac);
- if (ctx->ssl_mac_pkey_id[SSL_MD_KUZNYECHIKOMAC_IDX])
- ctx->ssl_mac_secret_size[SSL_MD_KUZNYECHIKOMAC_IDX] = 32;
- else
- ctx->disabled_mac_mask |= SSL_KUZNYECHIKOMAC;
- if (!get_optional_pkey_id(SN_id_GostR3410_2001))
- ctx->disabled_auth_mask |= SSL_aGOST01 | SSL_aGOST12;
- if (!get_optional_pkey_id(SN_id_GostR3410_2012_256))
- ctx->disabled_auth_mask |= SSL_aGOST12;
- if (!get_optional_pkey_id(SN_id_GostR3410_2012_512))
- ctx->disabled_auth_mask |= SSL_aGOST12;
- /*
- * Disable GOST key exchange if no GOST signature algs are available *
- */
- if ((ctx->disabled_auth_mask & (SSL_aGOST01 | SSL_aGOST12)) ==
- (SSL_aGOST01 | SSL_aGOST12))
- ctx->disabled_mkey_mask |= SSL_kGOST;
- if ((ctx->disabled_auth_mask & SSL_aGOST12) == SSL_aGOST12)
- ctx->disabled_mkey_mask |= SSL_kGOST18;
- return 1;
- }
- #ifndef OPENSSL_NO_COMP
- static int sk_comp_cmp(const SSL_COMP *const *a, const SSL_COMP *const *b)
- {
- return ((*a)->id - (*b)->id);
- }
- DEFINE_RUN_ONCE_STATIC(do_load_builtin_compressions)
- {
- SSL_COMP *comp = NULL;
- COMP_METHOD *method = COMP_zlib();
- ssl_comp_methods = sk_SSL_COMP_new(sk_comp_cmp);
- if (COMP_get_type(method) != NID_undef && ssl_comp_methods != NULL) {
- comp = OPENSSL_malloc(sizeof(*comp));
- if (comp != NULL) {
- comp->method = method;
- comp->id = SSL_COMP_ZLIB_IDX;
- comp->name = COMP_get_name(method);
- if (!sk_SSL_COMP_push(ssl_comp_methods, comp))
- OPENSSL_free(comp);
- sk_SSL_COMP_sort(ssl_comp_methods);
- }
- }
- return 1;
- }
- static int load_builtin_compressions(void)
- {
- return RUN_ONCE(&ssl_load_builtin_comp_once, do_load_builtin_compressions);
- }
- #endif
- int ssl_cipher_get_evp_cipher(SSL_CTX *ctx, const SSL_CIPHER *sslc,
- const EVP_CIPHER **enc)
- {
- int i = ssl_cipher_info_lookup(ssl_cipher_table_cipher, sslc->algorithm_enc);
- if (i == -1) {
- *enc = NULL;
- } else {
- if (i == SSL_ENC_NULL_IDX) {
- /*
- * We assume we don't care about this coming from an ENGINE so
- * just do a normal EVP_CIPHER_fetch instead of
- * ssl_evp_cipher_fetch()
- */
- *enc = EVP_CIPHER_fetch(ctx->libctx, "NULL", ctx->propq);
- if (*enc == NULL)
- return 0;
- } else {
- const EVP_CIPHER *cipher = ctx->ssl_cipher_methods[i];
- if (cipher == NULL
- || !ssl_evp_cipher_up_ref(cipher))
- return 0;
- *enc = ctx->ssl_cipher_methods[i];
- }
- }
- return 1;
- }
- int ssl_cipher_get_evp(SSL_CTX *ctx, const SSL_SESSION *s,
- const EVP_CIPHER **enc, const EVP_MD **md,
- int *mac_pkey_type, size_t *mac_secret_size,
- SSL_COMP **comp, int use_etm)
- {
- int i;
- const SSL_CIPHER *c;
- c = s->cipher;
- if (c == NULL)
- return 0;
- if (comp != NULL) {
- SSL_COMP ctmp;
- #ifndef OPENSSL_NO_COMP
- if (!load_builtin_compressions()) {
- /*
- * Currently don't care, since a failure only means that
- * ssl_comp_methods is NULL, which is perfectly OK
- */
- }
- #endif
- *comp = NULL;
- ctmp.id = s->compress_meth;
- if (ssl_comp_methods != NULL) {
- i = sk_SSL_COMP_find(ssl_comp_methods, &ctmp);
- if (i >= 0)
- *comp = sk_SSL_COMP_value(ssl_comp_methods, i);
- }
- /* If were only interested in comp then return success */
- if ((enc == NULL) && (md == NULL))
- return 1;
- }
- if ((enc == NULL) || (md == NULL))
- return 0;
- if (!ssl_cipher_get_evp_cipher(ctx, c, enc))
- return 0;
- i = ssl_cipher_info_lookup(ssl_cipher_table_mac, c->algorithm_mac);
- if (i == -1) {
- *md = NULL;
- if (mac_pkey_type != NULL)
- *mac_pkey_type = NID_undef;
- if (mac_secret_size != NULL)
- *mac_secret_size = 0;
- if (c->algorithm_mac == SSL_AEAD)
- mac_pkey_type = NULL;
- } else {
- const EVP_MD *digest = ctx->ssl_digest_methods[i];
- if (digest == NULL
- || !ssl_evp_md_up_ref(digest)) {
- ssl_evp_cipher_free(*enc);
- return 0;
- }
- *md = digest;
- if (mac_pkey_type != NULL)
- *mac_pkey_type = ctx->ssl_mac_pkey_id[i];
- if (mac_secret_size != NULL)
- *mac_secret_size = ctx->ssl_mac_secret_size[i];
- }
- if ((*enc != NULL)
- && (*md != NULL
- || (EVP_CIPHER_get_flags(*enc) & EVP_CIPH_FLAG_AEAD_CIPHER))
- && (!mac_pkey_type || *mac_pkey_type != NID_undef)) {
- const EVP_CIPHER *evp = NULL;
- if (use_etm
- || s->ssl_version >> 8 != TLS1_VERSION_MAJOR
- || s->ssl_version < TLS1_VERSION)
- return 1;
- if (c->algorithm_enc == SSL_RC4
- && c->algorithm_mac == SSL_MD5)
- evp = ssl_evp_cipher_fetch(ctx->libctx, NID_rc4_hmac_md5,
- ctx->propq);
- else if (c->algorithm_enc == SSL_AES128
- && c->algorithm_mac == SSL_SHA1)
- evp = ssl_evp_cipher_fetch(ctx->libctx,
- NID_aes_128_cbc_hmac_sha1,
- ctx->propq);
- else if (c->algorithm_enc == SSL_AES256
- && c->algorithm_mac == SSL_SHA1)
- evp = ssl_evp_cipher_fetch(ctx->libctx,
- NID_aes_256_cbc_hmac_sha1,
- ctx->propq);
- else if (c->algorithm_enc == SSL_AES128
- && c->algorithm_mac == SSL_SHA256)
- evp = ssl_evp_cipher_fetch(ctx->libctx,
- NID_aes_128_cbc_hmac_sha256,
- ctx->propq);
- else if (c->algorithm_enc == SSL_AES256
- && c->algorithm_mac == SSL_SHA256)
- evp = ssl_evp_cipher_fetch(ctx->libctx,
- NID_aes_256_cbc_hmac_sha256,
- ctx->propq);
- if (evp != NULL) {
- ssl_evp_cipher_free(*enc);
- ssl_evp_md_free(*md);
- *enc = evp;
- *md = NULL;
- }
- return 1;
- }
- return 0;
- }
- const EVP_MD *ssl_md(SSL_CTX *ctx, int idx)
- {
- idx &= SSL_HANDSHAKE_MAC_MASK;
- if (idx < 0 || idx >= SSL_MD_NUM_IDX)
- return NULL;
- return ctx->ssl_digest_methods[idx];
- }
- const EVP_MD *ssl_handshake_md(SSL_CONNECTION *s)
- {
- return ssl_md(SSL_CONNECTION_GET_CTX(s), ssl_get_algorithm2(s));
- }
- const EVP_MD *ssl_prf_md(SSL_CONNECTION *s)
- {
- return ssl_md(SSL_CONNECTION_GET_CTX(s),
- ssl_get_algorithm2(s) >> TLS1_PRF_DGST_SHIFT);
- }
- #define ITEM_SEP(a) \
- (((a) == ':') || ((a) == ' ') || ((a) == ';') || ((a) == ','))
- static void ll_append_tail(CIPHER_ORDER **head, CIPHER_ORDER *curr,
- CIPHER_ORDER **tail)
- {
- if (curr == *tail)
- return;
- if (curr == *head)
- *head = curr->next;
- if (curr->prev != NULL)
- curr->prev->next = curr->next;
- if (curr->next != NULL)
- curr->next->prev = curr->prev;
- (*tail)->next = curr;
- curr->prev = *tail;
- curr->next = NULL;
- *tail = curr;
- }
- static void ll_append_head(CIPHER_ORDER **head, CIPHER_ORDER *curr,
- CIPHER_ORDER **tail)
- {
- if (curr == *head)
- return;
- if (curr == *tail)
- *tail = curr->prev;
- if (curr->next != NULL)
- curr->next->prev = curr->prev;
- if (curr->prev != NULL)
- curr->prev->next = curr->next;
- (*head)->prev = curr;
- curr->next = *head;
- curr->prev = NULL;
- *head = curr;
- }
- static void ssl_cipher_collect_ciphers(const SSL_METHOD *ssl_method,
- int num_of_ciphers,
- uint32_t disabled_mkey,
- uint32_t disabled_auth,
- uint32_t disabled_enc,
- uint32_t disabled_mac,
- CIPHER_ORDER *co_list,
- CIPHER_ORDER **head_p,
- CIPHER_ORDER **tail_p)
- {
- int i, co_list_num;
- const SSL_CIPHER *c;
- /*
- * We have num_of_ciphers descriptions compiled in, depending on the
- * method selected (SSLv3, TLSv1 etc).
- * These will later be sorted in a linked list with at most num
- * entries.
- */
- /* Get the initial list of ciphers */
- co_list_num = 0; /* actual count of ciphers */
- for (i = 0; i < num_of_ciphers; i++) {
- c = ssl_method->get_cipher(i);
- /* drop those that use any of that is not available */
- if (c == NULL || !c->valid)
- continue;
- if ((c->algorithm_mkey & disabled_mkey) ||
- (c->algorithm_auth & disabled_auth) ||
- (c->algorithm_enc & disabled_enc) ||
- (c->algorithm_mac & disabled_mac))
- continue;
- if (((ssl_method->ssl3_enc->enc_flags & SSL_ENC_FLAG_DTLS) == 0) &&
- c->min_tls == 0)
- continue;
- if (((ssl_method->ssl3_enc->enc_flags & SSL_ENC_FLAG_DTLS) != 0) &&
- c->min_dtls == 0)
- continue;
- co_list[co_list_num].cipher = c;
- co_list[co_list_num].next = NULL;
- co_list[co_list_num].prev = NULL;
- co_list[co_list_num].active = 0;
- co_list_num++;
- }
- /*
- * Prepare linked list from list entries
- */
- if (co_list_num > 0) {
- co_list[0].prev = NULL;
- if (co_list_num > 1) {
- co_list[0].next = &co_list[1];
- for (i = 1; i < co_list_num - 1; i++) {
- co_list[i].prev = &co_list[i - 1];
- co_list[i].next = &co_list[i + 1];
- }
- co_list[co_list_num - 1].prev = &co_list[co_list_num - 2];
- }
- co_list[co_list_num - 1].next = NULL;
- *head_p = &co_list[0];
- *tail_p = &co_list[co_list_num - 1];
- }
- }
- static void ssl_cipher_collect_aliases(const SSL_CIPHER **ca_list,
- int num_of_group_aliases,
- uint32_t disabled_mkey,
- uint32_t disabled_auth,
- uint32_t disabled_enc,
- uint32_t disabled_mac,
- CIPHER_ORDER *head)
- {
- CIPHER_ORDER *ciph_curr;
- const SSL_CIPHER **ca_curr;
- int i;
- uint32_t mask_mkey = ~disabled_mkey;
- uint32_t mask_auth = ~disabled_auth;
- uint32_t mask_enc = ~disabled_enc;
- uint32_t mask_mac = ~disabled_mac;
- /*
- * First, add the real ciphers as already collected
- */
- ciph_curr = head;
- ca_curr = ca_list;
- while (ciph_curr != NULL) {
- *ca_curr = ciph_curr->cipher;
- ca_curr++;
- ciph_curr = ciph_curr->next;
- }
- /*
- * Now we add the available ones from the cipher_aliases[] table.
- * They represent either one or more algorithms, some of which
- * in any affected category must be supported (set in enabled_mask),
- * or represent a cipher strength value (will be added in any case because algorithms=0).
- */
- for (i = 0; i < num_of_group_aliases; i++) {
- uint32_t algorithm_mkey = cipher_aliases[i].algorithm_mkey;
- uint32_t algorithm_auth = cipher_aliases[i].algorithm_auth;
- uint32_t algorithm_enc = cipher_aliases[i].algorithm_enc;
- uint32_t algorithm_mac = cipher_aliases[i].algorithm_mac;
- if (algorithm_mkey)
- if ((algorithm_mkey & mask_mkey) == 0)
- continue;
- if (algorithm_auth)
- if ((algorithm_auth & mask_auth) == 0)
- continue;
- if (algorithm_enc)
- if ((algorithm_enc & mask_enc) == 0)
- continue;
- if (algorithm_mac)
- if ((algorithm_mac & mask_mac) == 0)
- continue;
- *ca_curr = (SSL_CIPHER *)(cipher_aliases + i);
- ca_curr++;
- }
- *ca_curr = NULL; /* end of list */
- }
- static void ssl_cipher_apply_rule(uint32_t cipher_id, uint32_t alg_mkey,
- uint32_t alg_auth, uint32_t alg_enc,
- uint32_t alg_mac, int min_tls,
- uint32_t algo_strength, int rule,
- int32_t strength_bits, CIPHER_ORDER **head_p,
- CIPHER_ORDER **tail_p)
- {
- CIPHER_ORDER *head, *tail, *curr, *next, *last;
- const SSL_CIPHER *cp;
- int reverse = 0;
- OSSL_TRACE_BEGIN(TLS_CIPHER) {
- BIO_printf(trc_out,
- "Applying rule %d with %08x/%08x/%08x/%08x/%08x %08x (%d)\n",
- rule, (unsigned int)alg_mkey, (unsigned int)alg_auth,
- (unsigned int)alg_enc, (unsigned int)alg_mac, min_tls,
- (unsigned int)algo_strength, (int)strength_bits);
- }
- if (rule == CIPHER_DEL || rule == CIPHER_BUMP)
- reverse = 1; /* needed to maintain sorting between currently
- * deleted ciphers */
- head = *head_p;
- tail = *tail_p;
- if (reverse) {
- next = tail;
- last = head;
- } else {
- next = head;
- last = tail;
- }
- curr = NULL;
- for (;;) {
- if (curr == last)
- break;
- curr = next;
- if (curr == NULL)
- break;
- next = reverse ? curr->prev : curr->next;
- cp = curr->cipher;
- /*
- * Selection criteria is either the value of strength_bits
- * or the algorithms used.
- */
- if (strength_bits >= 0) {
- if (strength_bits != cp->strength_bits)
- continue;
- } else {
- if (trc_out != NULL) {
- BIO_printf(trc_out,
- "\nName: %s:"
- "\nAlgo = %08x/%08x/%08x/%08x/%08x Algo_strength = %08x\n",
- cp->name,
- (unsigned int)cp->algorithm_mkey,
- (unsigned int)cp->algorithm_auth,
- (unsigned int)cp->algorithm_enc,
- (unsigned int)cp->algorithm_mac,
- cp->min_tls,
- (unsigned int)cp->algo_strength);
- }
- if (cipher_id != 0 && (cipher_id != cp->id))
- continue;
- if (alg_mkey && !(alg_mkey & cp->algorithm_mkey))
- continue;
- if (alg_auth && !(alg_auth & cp->algorithm_auth))
- continue;
- if (alg_enc && !(alg_enc & cp->algorithm_enc))
- continue;
- if (alg_mac && !(alg_mac & cp->algorithm_mac))
- continue;
- if (min_tls && (min_tls != cp->min_tls))
- continue;
- if ((algo_strength & SSL_STRONG_MASK)
- && !(algo_strength & SSL_STRONG_MASK & cp->algo_strength))
- continue;
- if ((algo_strength & SSL_DEFAULT_MASK)
- && !(algo_strength & SSL_DEFAULT_MASK & cp->algo_strength))
- continue;
- }
- if (trc_out != NULL)
- BIO_printf(trc_out, "Action = %d\n", rule);
- /* add the cipher if it has not been added yet. */
- if (rule == CIPHER_ADD) {
- /* reverse == 0 */
- if (!curr->active) {
- ll_append_tail(&head, curr, &tail);
- curr->active = 1;
- }
- }
- /* Move the added cipher to this location */
- else if (rule == CIPHER_ORD) {
- /* reverse == 0 */
- if (curr->active) {
- ll_append_tail(&head, curr, &tail);
- }
- } else if (rule == CIPHER_DEL) {
- /* reverse == 1 */
- if (curr->active) {
- /*
- * most recently deleted ciphersuites get best positions for
- * any future CIPHER_ADD (note that the CIPHER_DEL loop works
- * in reverse to maintain the order)
- */
- ll_append_head(&head, curr, &tail);
- curr->active = 0;
- }
- } else if (rule == CIPHER_BUMP) {
- if (curr->active)
- ll_append_head(&head, curr, &tail);
- } else if (rule == CIPHER_KILL) {
- /* reverse == 0 */
- if (head == curr)
- head = curr->next;
- else
- curr->prev->next = curr->next;
- if (tail == curr)
- tail = curr->prev;
- curr->active = 0;
- if (curr->next != NULL)
- curr->next->prev = curr->prev;
- if (curr->prev != NULL)
- curr->prev->next = curr->next;
- curr->next = NULL;
- curr->prev = NULL;
- }
- }
- *head_p = head;
- *tail_p = tail;
- OSSL_TRACE_END(TLS_CIPHER);
- }
- static int ssl_cipher_strength_sort(CIPHER_ORDER **head_p,
- CIPHER_ORDER **tail_p)
- {
- int32_t max_strength_bits;
- int i, *number_uses;
- CIPHER_ORDER *curr;
- /*
- * This routine sorts the ciphers with descending strength. The sorting
- * must keep the pre-sorted sequence, so we apply the normal sorting
- * routine as '+' movement to the end of the list.
- */
- max_strength_bits = 0;
- curr = *head_p;
- while (curr != NULL) {
- if (curr->active && (curr->cipher->strength_bits > max_strength_bits))
- max_strength_bits = curr->cipher->strength_bits;
- curr = curr->next;
- }
- number_uses = OPENSSL_zalloc(sizeof(int) * (max_strength_bits + 1));
- if (number_uses == NULL)
- return 0;
- /*
- * Now find the strength_bits values actually used
- */
- curr = *head_p;
- while (curr != NULL) {
- if (curr->active)
- number_uses[curr->cipher->strength_bits]++;
- curr = curr->next;
- }
- /*
- * Go through the list of used strength_bits values in descending
- * order.
- */
- for (i = max_strength_bits; i >= 0; i--)
- if (number_uses[i] > 0)
- ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_ORD, i, head_p,
- tail_p);
- OPENSSL_free(number_uses);
- return 1;
- }
- static int ssl_cipher_process_rulestr(const char *rule_str,
- CIPHER_ORDER **head_p,
- CIPHER_ORDER **tail_p,
- const SSL_CIPHER **ca_list, CERT *c)
- {
- uint32_t alg_mkey, alg_auth, alg_enc, alg_mac, algo_strength;
- int min_tls;
- const char *l, *buf;
- int j, multi, found, rule, retval, ok, buflen;
- uint32_t cipher_id = 0;
- char ch;
- retval = 1;
- l = rule_str;
- for (;;) {
- ch = *l;
- if (ch == '\0')
- break; /* done */
- if (ch == '-') {
- rule = CIPHER_DEL;
- l++;
- } else if (ch == '+') {
- rule = CIPHER_ORD;
- l++;
- } else if (ch == '!') {
- rule = CIPHER_KILL;
- l++;
- } else if (ch == '@') {
- rule = CIPHER_SPECIAL;
- l++;
- } else {
- rule = CIPHER_ADD;
- }
- if (ITEM_SEP(ch)) {
- l++;
- continue;
- }
- alg_mkey = 0;
- alg_auth = 0;
- alg_enc = 0;
- alg_mac = 0;
- min_tls = 0;
- algo_strength = 0;
- for (;;) {
- ch = *l;
- buf = l;
- buflen = 0;
- #ifndef CHARSET_EBCDIC
- while (((ch >= 'A') && (ch <= 'Z')) ||
- ((ch >= '0') && (ch <= '9')) ||
- ((ch >= 'a') && (ch <= 'z')) ||
- (ch == '-') || (ch == '_') || (ch == '.') || (ch == '='))
- #else
- while (isalnum((unsigned char)ch) || (ch == '-') || (ch == '_') || (ch == '.')
- || (ch == '='))
- #endif
- {
- ch = *(++l);
- buflen++;
- }
- if (buflen == 0) {
- /*
- * We hit something we cannot deal with,
- * it is no command or separator nor
- * alphanumeric, so we call this an error.
- */
- ERR_raise(ERR_LIB_SSL, SSL_R_INVALID_COMMAND);
- return 0;
- }
- if (rule == CIPHER_SPECIAL) {
- found = 0; /* unused -- avoid compiler warning */
- break; /* special treatment */
- }
- /* check for multi-part specification */
- if (ch == '+') {
- multi = 1;
- l++;
- } else {
- multi = 0;
- }
- /*
- * Now search for the cipher alias in the ca_list. Be careful
- * with the strncmp, because the "buflen" limitation
- * will make the rule "ADH:SOME" and the cipher
- * "ADH-MY-CIPHER" look like a match for buflen=3.
- * So additionally check whether the cipher name found
- * has the correct length. We can save a strlen() call:
- * just checking for the '\0' at the right place is
- * sufficient, we have to strncmp() anyway. (We cannot
- * use strcmp(), because buf is not '\0' terminated.)
- */
- j = found = 0;
- cipher_id = 0;
- while (ca_list[j]) {
- if (strncmp(buf, ca_list[j]->name, buflen) == 0
- && (ca_list[j]->name[buflen] == '\0')) {
- found = 1;
- break;
- } else if (ca_list[j]->stdname != NULL
- && strncmp(buf, ca_list[j]->stdname, buflen) == 0
- && ca_list[j]->stdname[buflen] == '\0') {
- found = 1;
- break;
- } else
- j++;
- }
- if (!found)
- break; /* ignore this entry */
- if (ca_list[j]->algorithm_mkey) {
- if (alg_mkey) {
- alg_mkey &= ca_list[j]->algorithm_mkey;
- if (!alg_mkey) {
- found = 0;
- break;
- }
- } else {
- alg_mkey = ca_list[j]->algorithm_mkey;
- }
- }
- if (ca_list[j]->algorithm_auth) {
- if (alg_auth) {
- alg_auth &= ca_list[j]->algorithm_auth;
- if (!alg_auth) {
- found = 0;
- break;
- }
- } else {
- alg_auth = ca_list[j]->algorithm_auth;
- }
- }
- if (ca_list[j]->algorithm_enc) {
- if (alg_enc) {
- alg_enc &= ca_list[j]->algorithm_enc;
- if (!alg_enc) {
- found = 0;
- break;
- }
- } else {
- alg_enc = ca_list[j]->algorithm_enc;
- }
- }
- if (ca_list[j]->algorithm_mac) {
- if (alg_mac) {
- alg_mac &= ca_list[j]->algorithm_mac;
- if (!alg_mac) {
- found = 0;
- break;
- }
- } else {
- alg_mac = ca_list[j]->algorithm_mac;
- }
- }
- if (ca_list[j]->algo_strength & SSL_STRONG_MASK) {
- if (algo_strength & SSL_STRONG_MASK) {
- algo_strength &=
- (ca_list[j]->algo_strength & SSL_STRONG_MASK) |
- ~SSL_STRONG_MASK;
- if (!(algo_strength & SSL_STRONG_MASK)) {
- found = 0;
- break;
- }
- } else {
- algo_strength = ca_list[j]->algo_strength & SSL_STRONG_MASK;
- }
- }
- if (ca_list[j]->algo_strength & SSL_DEFAULT_MASK) {
- if (algo_strength & SSL_DEFAULT_MASK) {
- algo_strength &=
- (ca_list[j]->algo_strength & SSL_DEFAULT_MASK) |
- ~SSL_DEFAULT_MASK;
- if (!(algo_strength & SSL_DEFAULT_MASK)) {
- found = 0;
- break;
- }
- } else {
- algo_strength |=
- ca_list[j]->algo_strength & SSL_DEFAULT_MASK;
- }
- }
- if (ca_list[j]->valid) {
- /*
- * explicit ciphersuite found; its protocol version does not
- * become part of the search pattern!
- */
- cipher_id = ca_list[j]->id;
- } else {
- /*
- * not an explicit ciphersuite; only in this case, the
- * protocol version is considered part of the search pattern
- */
- if (ca_list[j]->min_tls) {
- if (min_tls != 0 && min_tls != ca_list[j]->min_tls) {
- found = 0;
- break;
- } else {
- min_tls = ca_list[j]->min_tls;
- }
- }
- }
- if (!multi)
- break;
- }
- /*
- * Ok, we have the rule, now apply it
- */
- if (rule == CIPHER_SPECIAL) { /* special command */
- ok = 0;
- if ((buflen == 8) && HAS_PREFIX(buf, "STRENGTH")) {
- ok = ssl_cipher_strength_sort(head_p, tail_p);
- } else if (buflen == 10 && CHECK_AND_SKIP_PREFIX(buf, "SECLEVEL=")) {
- int level = *buf - '0';
- if (level < 0 || level > 5) {
- ERR_raise(ERR_LIB_SSL, SSL_R_INVALID_COMMAND);
- } else {
- c->sec_level = level;
- ok = 1;
- }
- } else {
- ERR_raise(ERR_LIB_SSL, SSL_R_INVALID_COMMAND);
- }
- if (ok == 0)
- retval = 0;
- /*
- * We do not support any "multi" options
- * together with "@", so throw away the
- * rest of the command, if any left, until
- * end or ':' is found.
- */
- while ((*l != '\0') && !ITEM_SEP(*l))
- l++;
- } else if (found) {
- ssl_cipher_apply_rule(cipher_id,
- alg_mkey, alg_auth, alg_enc, alg_mac,
- min_tls, algo_strength, rule, -1, head_p,
- tail_p);
- } else {
- while ((*l != '\0') && !ITEM_SEP(*l))
- l++;
- }
- if (*l == '\0')
- break; /* done */
- }
- return retval;
- }
- static int check_suiteb_cipher_list(const SSL_METHOD *meth, CERT *c,
- const char **prule_str)
- {
- unsigned int suiteb_flags = 0, suiteb_comb2 = 0;
- if (HAS_PREFIX(*prule_str, "SUITEB128ONLY")) {
- suiteb_flags = SSL_CERT_FLAG_SUITEB_128_LOS_ONLY;
- } else if (HAS_PREFIX(*prule_str, "SUITEB128C2")) {
- suiteb_comb2 = 1;
- suiteb_flags = SSL_CERT_FLAG_SUITEB_128_LOS;
- } else if (HAS_PREFIX(*prule_str, "SUITEB128")) {
- suiteb_flags = SSL_CERT_FLAG_SUITEB_128_LOS;
- } else if (HAS_PREFIX(*prule_str, "SUITEB192")) {
- suiteb_flags = SSL_CERT_FLAG_SUITEB_192_LOS;
- }
- if (suiteb_flags) {
- c->cert_flags &= ~SSL_CERT_FLAG_SUITEB_128_LOS;
- c->cert_flags |= suiteb_flags;
- } else {
- suiteb_flags = c->cert_flags & SSL_CERT_FLAG_SUITEB_128_LOS;
- }
- if (!suiteb_flags)
- return 1;
- /* Check version: if TLS 1.2 ciphers allowed we can use Suite B */
- if (!(meth->ssl3_enc->enc_flags & SSL_ENC_FLAG_TLS1_2_CIPHERS)) {
- ERR_raise(ERR_LIB_SSL, SSL_R_AT_LEAST_TLS_1_2_NEEDED_IN_SUITEB_MODE);
- return 0;
- }
- switch (suiteb_flags) {
- case SSL_CERT_FLAG_SUITEB_128_LOS:
- if (suiteb_comb2)
- *prule_str = "ECDHE-ECDSA-AES256-GCM-SHA384";
- else
- *prule_str =
- "ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384";
- break;
- case SSL_CERT_FLAG_SUITEB_128_LOS_ONLY:
- *prule_str = "ECDHE-ECDSA-AES128-GCM-SHA256";
- break;
- case SSL_CERT_FLAG_SUITEB_192_LOS:
- *prule_str = "ECDHE-ECDSA-AES256-GCM-SHA384";
- break;
- }
- return 1;
- }
- static int ciphersuite_cb(const char *elem, int len, void *arg)
- {
- STACK_OF(SSL_CIPHER) *ciphersuites = (STACK_OF(SSL_CIPHER) *)arg;
- const SSL_CIPHER *cipher;
- /* Arbitrary sized temp buffer for the cipher name. Should be big enough */
- char name[80];
- if (len > (int)(sizeof(name) - 1))
- /* Anyway return 1 so we can parse rest of the list */
- return 1;
- memcpy(name, elem, len);
- name[len] = '\0';
- cipher = ssl3_get_cipher_by_std_name(name);
- if (cipher == NULL)
- /* Ciphersuite not found but return 1 to parse rest of the list */
- return 1;
- if (!sk_SSL_CIPHER_push(ciphersuites, cipher)) {
- ERR_raise(ERR_LIB_SSL, ERR_R_INTERNAL_ERROR);
- return 0;
- }
- return 1;
- }
- static __owur int set_ciphersuites(STACK_OF(SSL_CIPHER) **currciphers, const char *str)
- {
- STACK_OF(SSL_CIPHER) *newciphers = sk_SSL_CIPHER_new_null();
- if (newciphers == NULL)
- return 0;
- /* Parse the list. We explicitly allow an empty list */
- if (*str != '\0'
- && (CONF_parse_list(str, ':', 1, ciphersuite_cb, newciphers) <= 0
- || sk_SSL_CIPHER_num(newciphers) == 0)) {
- ERR_raise(ERR_LIB_SSL, SSL_R_NO_CIPHER_MATCH);
- sk_SSL_CIPHER_free(newciphers);
- return 0;
- }
- sk_SSL_CIPHER_free(*currciphers);
- *currciphers = newciphers;
- return 1;
- }
- static int update_cipher_list_by_id(STACK_OF(SSL_CIPHER) **cipher_list_by_id,
- STACK_OF(SSL_CIPHER) *cipherstack)
- {
- STACK_OF(SSL_CIPHER) *tmp_cipher_list = sk_SSL_CIPHER_dup(cipherstack);
- if (tmp_cipher_list == NULL) {
- return 0;
- }
- sk_SSL_CIPHER_free(*cipher_list_by_id);
- *cipher_list_by_id = tmp_cipher_list;
- (void)sk_SSL_CIPHER_set_cmp_func(*cipher_list_by_id, ssl_cipher_ptr_id_cmp);
- sk_SSL_CIPHER_sort(*cipher_list_by_id);
- return 1;
- }
- static int update_cipher_list(SSL_CTX *ctx,
- STACK_OF(SSL_CIPHER) **cipher_list,
- STACK_OF(SSL_CIPHER) **cipher_list_by_id,
- STACK_OF(SSL_CIPHER) *tls13_ciphersuites)
- {
- int i;
- STACK_OF(SSL_CIPHER) *tmp_cipher_list = sk_SSL_CIPHER_dup(*cipher_list);
- if (tmp_cipher_list == NULL)
- return 0;
- /*
- * Delete any existing TLSv1.3 ciphersuites. These are always first in the
- * list.
- */
- while (sk_SSL_CIPHER_num(tmp_cipher_list) > 0
- && sk_SSL_CIPHER_value(tmp_cipher_list, 0)->min_tls
- == TLS1_3_VERSION)
- (void)sk_SSL_CIPHER_delete(tmp_cipher_list, 0);
- /* Insert the new TLSv1.3 ciphersuites */
- for (i = sk_SSL_CIPHER_num(tls13_ciphersuites) - 1; i >= 0; i--) {
- const SSL_CIPHER *sslc = sk_SSL_CIPHER_value(tls13_ciphersuites, i);
- /* Don't include any TLSv1.3 ciphersuites that are disabled */
- if ((sslc->algorithm_enc & ctx->disabled_enc_mask) == 0
- && (ssl_cipher_table_mac[sslc->algorithm2
- & SSL_HANDSHAKE_MAC_MASK].mask
- & ctx->disabled_mac_mask) == 0) {
- sk_SSL_CIPHER_unshift(tmp_cipher_list, sslc);
- }
- }
- if (!update_cipher_list_by_id(cipher_list_by_id, tmp_cipher_list)) {
- sk_SSL_CIPHER_free(tmp_cipher_list);
- return 0;
- }
- sk_SSL_CIPHER_free(*cipher_list);
- *cipher_list = tmp_cipher_list;
- return 1;
- }
- int SSL_CTX_set_ciphersuites(SSL_CTX *ctx, const char *str)
- {
- int ret = set_ciphersuites(&(ctx->tls13_ciphersuites), str);
- if (ret && ctx->cipher_list != NULL)
- return update_cipher_list(ctx, &ctx->cipher_list, &ctx->cipher_list_by_id,
- ctx->tls13_ciphersuites);
- return ret;
- }
- int SSL_set_ciphersuites(SSL *s, const char *str)
- {
- STACK_OF(SSL_CIPHER) *cipher_list;
- SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
- int ret;
- if (sc == NULL)
- return 0;
- ret = set_ciphersuites(&(sc->tls13_ciphersuites), str);
- if (sc->cipher_list == NULL) {
- if ((cipher_list = SSL_get_ciphers(s)) != NULL)
- sc->cipher_list = sk_SSL_CIPHER_dup(cipher_list);
- }
- if (ret && sc->cipher_list != NULL)
- return update_cipher_list(s->ctx, &sc->cipher_list,
- &sc->cipher_list_by_id,
- sc->tls13_ciphersuites);
- return ret;
- }
- STACK_OF(SSL_CIPHER) *ssl_create_cipher_list(SSL_CTX *ctx,
- STACK_OF(SSL_CIPHER) *tls13_ciphersuites,
- STACK_OF(SSL_CIPHER) **cipher_list,
- STACK_OF(SSL_CIPHER) **cipher_list_by_id,
- const char *rule_str,
- CERT *c)
- {
- int ok, num_of_ciphers, num_of_alias_max, num_of_group_aliases, i;
- uint32_t disabled_mkey, disabled_auth, disabled_enc, disabled_mac;
- STACK_OF(SSL_CIPHER) *cipherstack;
- const char *rule_p;
- CIPHER_ORDER *co_list = NULL, *head = NULL, *tail = NULL, *curr;
- const SSL_CIPHER **ca_list = NULL;
- const SSL_METHOD *ssl_method = ctx->method;
- /*
- * Return with error if nothing to do.
- */
- if (rule_str == NULL || cipher_list == NULL || cipher_list_by_id == NULL)
- return NULL;
- if (!check_suiteb_cipher_list(ssl_method, c, &rule_str))
- return NULL;
- /*
- * To reduce the work to do we only want to process the compiled
- * in algorithms, so we first get the mask of disabled ciphers.
- */
- disabled_mkey = ctx->disabled_mkey_mask;
- disabled_auth = ctx->disabled_auth_mask;
- disabled_enc = ctx->disabled_enc_mask;
- disabled_mac = ctx->disabled_mac_mask;
- /*
- * Now we have to collect the available ciphers from the compiled
- * in ciphers. We cannot get more than the number compiled in, so
- * it is used for allocation.
- */
- num_of_ciphers = ssl_method->num_ciphers();
- if (num_of_ciphers > 0) {
- co_list = OPENSSL_malloc(sizeof(*co_list) * num_of_ciphers);
- if (co_list == NULL)
- return NULL; /* Failure */
- }
- ssl_cipher_collect_ciphers(ssl_method, num_of_ciphers,
- disabled_mkey, disabled_auth, disabled_enc,
- disabled_mac, co_list, &head, &tail);
- /* Now arrange all ciphers by preference. */
- /*
- * Everything else being equal, prefer ephemeral ECDH over other key
- * exchange mechanisms.
- * For consistency, prefer ECDSA over RSA (though this only matters if the
- * server has both certificates, and is using the DEFAULT, or a client
- * preference).
- */
- ssl_cipher_apply_rule(0, SSL_kECDHE, SSL_aECDSA, 0, 0, 0, 0, CIPHER_ADD,
- -1, &head, &tail);
- ssl_cipher_apply_rule(0, SSL_kECDHE, 0, 0, 0, 0, 0, CIPHER_ADD, -1, &head,
- &tail);
- ssl_cipher_apply_rule(0, SSL_kECDHE, 0, 0, 0, 0, 0, CIPHER_DEL, -1, &head,
- &tail);
- /* Within each strength group, we prefer GCM over CHACHA... */
- ssl_cipher_apply_rule(0, 0, 0, SSL_AESGCM, 0, 0, 0, CIPHER_ADD, -1,
- &head, &tail);
- ssl_cipher_apply_rule(0, 0, 0, SSL_CHACHA20, 0, 0, 0, CIPHER_ADD, -1,
- &head, &tail);
- /*
- * ...and generally, our preferred cipher is AES.
- * Note that AEADs will be bumped to take preference after sorting by
- * strength.
- */
- ssl_cipher_apply_rule(0, 0, 0, SSL_AES ^ SSL_AESGCM, 0, 0, 0, CIPHER_ADD,
- -1, &head, &tail);
- /* Temporarily enable everything else for sorting */
- ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_ADD, -1, &head, &tail);
- /* Low priority for MD5 */
- ssl_cipher_apply_rule(0, 0, 0, 0, SSL_MD5, 0, 0, CIPHER_ORD, -1, &head,
- &tail);
- /*
- * Move anonymous ciphers to the end. Usually, these will remain
- * disabled. (For applications that allow them, they aren't too bad, but
- * we prefer authenticated ciphers.)
- */
- ssl_cipher_apply_rule(0, 0, SSL_aNULL, 0, 0, 0, 0, CIPHER_ORD, -1, &head,
- &tail);
- ssl_cipher_apply_rule(0, SSL_kRSA, 0, 0, 0, 0, 0, CIPHER_ORD, -1, &head,
- &tail);
- ssl_cipher_apply_rule(0, SSL_kPSK, 0, 0, 0, 0, 0, CIPHER_ORD, -1, &head,
- &tail);
- /* RC4 is sort-of broken -- move to the end */
- ssl_cipher_apply_rule(0, 0, 0, SSL_RC4, 0, 0, 0, CIPHER_ORD, -1, &head,
- &tail);
- /*
- * Now sort by symmetric encryption strength. The above ordering remains
- * in force within each class
- */
- if (!ssl_cipher_strength_sort(&head, &tail)) {
- OPENSSL_free(co_list);
- return NULL;
- }
- /*
- * Partially overrule strength sort to prefer TLS 1.2 ciphers/PRFs.
- */
- ssl_cipher_apply_rule(0, 0, 0, 0, 0, TLS1_2_VERSION, 0, CIPHER_BUMP, -1,
- &head, &tail);
- /*
- * Irrespective of strength, enforce the following order:
- * (EC)DHE + AEAD > (EC)DHE > rest of AEAD > rest.
- * Within each group, ciphers remain sorted by strength and previous
- * preference, i.e.,
- * 1) ECDHE > DHE
- * 2) GCM > CHACHA
- * 3) AES > rest
- * 4) TLS 1.2 > legacy
- *
- * Because we now bump ciphers to the top of the list, we proceed in
- * reverse order of preference.
- */
- ssl_cipher_apply_rule(0, 0, 0, 0, SSL_AEAD, 0, 0, CIPHER_BUMP, -1,
- &head, &tail);
- ssl_cipher_apply_rule(0, SSL_kDHE | SSL_kECDHE, 0, 0, 0, 0, 0,
- CIPHER_BUMP, -1, &head, &tail);
- ssl_cipher_apply_rule(0, SSL_kDHE | SSL_kECDHE, 0, 0, SSL_AEAD, 0, 0,
- CIPHER_BUMP, -1, &head, &tail);
- /* Now disable everything (maintaining the ordering!) */
- ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_DEL, -1, &head, &tail);
- /*
- * We also need cipher aliases for selecting based on the rule_str.
- * There might be two types of entries in the rule_str: 1) names
- * of ciphers themselves 2) aliases for groups of ciphers.
- * For 1) we need the available ciphers and for 2) the cipher
- * groups of cipher_aliases added together in one list (otherwise
- * we would be happy with just the cipher_aliases table).
- */
- num_of_group_aliases = OSSL_NELEM(cipher_aliases);
- num_of_alias_max = num_of_ciphers + num_of_group_aliases + 1;
- ca_list = OPENSSL_malloc(sizeof(*ca_list) * num_of_alias_max);
- if (ca_list == NULL) {
- OPENSSL_free(co_list);
- return NULL; /* Failure */
- }
- ssl_cipher_collect_aliases(ca_list, num_of_group_aliases,
- disabled_mkey, disabled_auth, disabled_enc,
- disabled_mac, head);
- /*
- * If the rule_string begins with DEFAULT, apply the default rule
- * before using the (possibly available) additional rules.
- */
- ok = 1;
- rule_p = rule_str;
- if (HAS_PREFIX(rule_str, "DEFAULT")) {
- ok = ssl_cipher_process_rulestr(OSSL_default_cipher_list(),
- &head, &tail, ca_list, c);
- rule_p += 7;
- if (*rule_p == ':')
- rule_p++;
- }
- if (ok && (rule_p[0] != '\0'))
- ok = ssl_cipher_process_rulestr(rule_p, &head, &tail, ca_list, c);
- OPENSSL_free(ca_list); /* Not needed anymore */
- if (!ok) { /* Rule processing failure */
- OPENSSL_free(co_list);
- return NULL;
- }
- /*
- * Allocate new "cipherstack" for the result, return with error
- * if we cannot get one.
- */
- if ((cipherstack = sk_SSL_CIPHER_new_null()) == NULL) {
- OPENSSL_free(co_list);
- return NULL;
- }
- /* Add TLSv1.3 ciphers first - we always prefer those if possible */
- for (i = 0; i < sk_SSL_CIPHER_num(tls13_ciphersuites); i++) {
- const SSL_CIPHER *sslc = sk_SSL_CIPHER_value(tls13_ciphersuites, i);
- /* Don't include any TLSv1.3 ciphers that are disabled */
- if ((sslc->algorithm_enc & disabled_enc) != 0
- || (ssl_cipher_table_mac[sslc->algorithm2
- & SSL_HANDSHAKE_MAC_MASK].mask
- & ctx->disabled_mac_mask) != 0) {
- sk_SSL_CIPHER_delete(tls13_ciphersuites, i);
- i--;
- continue;
- }
- if (!sk_SSL_CIPHER_push(cipherstack, sslc)) {
- OPENSSL_free(co_list);
- sk_SSL_CIPHER_free(cipherstack);
- return NULL;
- }
- }
- OSSL_TRACE_BEGIN(TLS_CIPHER) {
- BIO_printf(trc_out, "cipher selection:\n");
- }
- /*
- * The cipher selection for the list is done. The ciphers are added
- * to the resulting precedence to the STACK_OF(SSL_CIPHER).
- */
- for (curr = head; curr != NULL; curr = curr->next) {
- if (curr->active) {
- if (!sk_SSL_CIPHER_push(cipherstack, curr->cipher)) {
- OPENSSL_free(co_list);
- sk_SSL_CIPHER_free(cipherstack);
- OSSL_TRACE_CANCEL(TLS_CIPHER);
- return NULL;
- }
- if (trc_out != NULL)
- BIO_printf(trc_out, "<%s>\n", curr->cipher->name);
- }
- }
- OPENSSL_free(co_list); /* Not needed any longer */
- OSSL_TRACE_END(TLS_CIPHER);
- if (!update_cipher_list_by_id(cipher_list_by_id, cipherstack)) {
- sk_SSL_CIPHER_free(cipherstack);
- return NULL;
- }
- sk_SSL_CIPHER_free(*cipher_list);
- *cipher_list = cipherstack;
- return cipherstack;
- }
- char *SSL_CIPHER_description(const SSL_CIPHER *cipher, char *buf, int len)
- {
- const char *ver;
- const char *kx, *au, *enc, *mac;
- uint32_t alg_mkey, alg_auth, alg_enc, alg_mac;
- static const char *const format = "%-30s %-7s Kx=%-8s Au=%-5s Enc=%-22s Mac=%-4s\n";
- if (buf == NULL) {
- len = 128;
- if ((buf = OPENSSL_malloc(len)) == NULL)
- return NULL;
- } else if (len < 128) {
- return NULL;
- }
- alg_mkey = cipher->algorithm_mkey;
- alg_auth = cipher->algorithm_auth;
- alg_enc = cipher->algorithm_enc;
- alg_mac = cipher->algorithm_mac;
- ver = ssl_protocol_to_string(cipher->min_tls);
- switch (alg_mkey) {
- case SSL_kRSA:
- kx = "RSA";
- break;
- case SSL_kDHE:
- kx = "DH";
- break;
- case SSL_kECDHE:
- kx = "ECDH";
- break;
- case SSL_kPSK:
- kx = "PSK";
- break;
- case SSL_kRSAPSK:
- kx = "RSAPSK";
- break;
- case SSL_kECDHEPSK:
- kx = "ECDHEPSK";
- break;
- case SSL_kDHEPSK:
- kx = "DHEPSK";
- break;
- case SSL_kSRP:
- kx = "SRP";
- break;
- case SSL_kGOST:
- kx = "GOST";
- break;
- case SSL_kGOST18:
- kx = "GOST18";
- break;
- case SSL_kANY:
- kx = "any";
- break;
- default:
- kx = "unknown";
- }
- switch (alg_auth) {
- case SSL_aRSA:
- au = "RSA";
- break;
- case SSL_aDSS:
- au = "DSS";
- break;
- case SSL_aNULL:
- au = "None";
- break;
- case SSL_aECDSA:
- au = "ECDSA";
- break;
- case SSL_aPSK:
- au = "PSK";
- break;
- case SSL_aSRP:
- au = "SRP";
- break;
- case SSL_aGOST01:
- au = "GOST01";
- break;
- /* New GOST ciphersuites have both SSL_aGOST12 and SSL_aGOST01 bits */
- case (SSL_aGOST12 | SSL_aGOST01):
- au = "GOST12";
- break;
- case SSL_aANY:
- au = "any";
- break;
- default:
- au = "unknown";
- break;
- }
- switch (alg_enc) {
- case SSL_DES:
- enc = "DES(56)";
- break;
- case SSL_3DES:
- enc = "3DES(168)";
- break;
- case SSL_RC4:
- enc = "RC4(128)";
- break;
- case SSL_RC2:
- enc = "RC2(128)";
- break;
- case SSL_IDEA:
- enc = "IDEA(128)";
- break;
- case SSL_eNULL:
- enc = "None";
- break;
- case SSL_AES128:
- enc = "AES(128)";
- break;
- case SSL_AES256:
- enc = "AES(256)";
- break;
- case SSL_AES128GCM:
- enc = "AESGCM(128)";
- break;
- case SSL_AES256GCM:
- enc = "AESGCM(256)";
- break;
- case SSL_AES128CCM:
- enc = "AESCCM(128)";
- break;
- case SSL_AES256CCM:
- enc = "AESCCM(256)";
- break;
- case SSL_AES128CCM8:
- enc = "AESCCM8(128)";
- break;
- case SSL_AES256CCM8:
- enc = "AESCCM8(256)";
- break;
- case SSL_CAMELLIA128:
- enc = "Camellia(128)";
- break;
- case SSL_CAMELLIA256:
- enc = "Camellia(256)";
- break;
- case SSL_ARIA128GCM:
- enc = "ARIAGCM(128)";
- break;
- case SSL_ARIA256GCM:
- enc = "ARIAGCM(256)";
- break;
- case SSL_SEED:
- enc = "SEED(128)";
- break;
- case SSL_eGOST2814789CNT:
- case SSL_eGOST2814789CNT12:
- enc = "GOST89(256)";
- break;
- case SSL_MAGMA:
- enc = "MAGMA";
- break;
- case SSL_KUZNYECHIK:
- enc = "KUZNYECHIK";
- break;
- case SSL_CHACHA20POLY1305:
- enc = "CHACHA20/POLY1305(256)";
- break;
- default:
- enc = "unknown";
- break;
- }
- switch (alg_mac) {
- case SSL_MD5:
- mac = "MD5";
- break;
- case SSL_SHA1:
- mac = "SHA1";
- break;
- case SSL_SHA256:
- mac = "SHA256";
- break;
- case SSL_SHA384:
- mac = "SHA384";
- break;
- case SSL_AEAD:
- mac = "AEAD";
- break;
- case SSL_GOST89MAC:
- case SSL_GOST89MAC12:
- mac = "GOST89";
- break;
- case SSL_GOST94:
- mac = "GOST94";
- break;
- case SSL_GOST12_256:
- case SSL_GOST12_512:
- mac = "GOST2012";
- break;
- default:
- mac = "unknown";
- break;
- }
- BIO_snprintf(buf, len, format, cipher->name, ver, kx, au, enc, mac);
- return buf;
- }
- const char *SSL_CIPHER_get_version(const SSL_CIPHER *c)
- {
- if (c == NULL)
- return "(NONE)";
- /*
- * Backwards-compatibility crutch. In almost all contexts we report TLS
- * 1.0 as "TLSv1", but for ciphers we report "TLSv1.0".
- */
- if (c->min_tls == TLS1_VERSION)
- return "TLSv1.0";
- return ssl_protocol_to_string(c->min_tls);
- }
- /* return the actual cipher being used */
- const char *SSL_CIPHER_get_name(const SSL_CIPHER *c)
- {
- if (c != NULL)
- return c->name;
- return "(NONE)";
- }
- /* return the actual cipher being used in RFC standard name */
- const char *SSL_CIPHER_standard_name(const SSL_CIPHER *c)
- {
- if (c != NULL)
- return c->stdname;
- return "(NONE)";
- }
- /* return the OpenSSL name based on given RFC standard name */
- const char *OPENSSL_cipher_name(const char *stdname)
- {
- const SSL_CIPHER *c;
- if (stdname == NULL)
- return "(NONE)";
- c = ssl3_get_cipher_by_std_name(stdname);
- return SSL_CIPHER_get_name(c);
- }
- /* number of bits for symmetric cipher */
- int SSL_CIPHER_get_bits(const SSL_CIPHER *c, int *alg_bits)
- {
- int ret = 0;
- if (c != NULL) {
- if (alg_bits != NULL)
- *alg_bits = (int)c->alg_bits;
- ret = (int)c->strength_bits;
- }
- return ret;
- }
- uint32_t SSL_CIPHER_get_id(const SSL_CIPHER *c)
- {
- return c->id;
- }
- uint16_t SSL_CIPHER_get_protocol_id(const SSL_CIPHER *c)
- {
- return c->id & 0xFFFF;
- }
- SSL_COMP *ssl3_comp_find(STACK_OF(SSL_COMP) *sk, int n)
- {
- SSL_COMP *ctmp;
- int i, nn;
- if ((n == 0) || (sk == NULL))
- return NULL;
- nn = sk_SSL_COMP_num(sk);
- for (i = 0; i < nn; i++) {
- ctmp = sk_SSL_COMP_value(sk, i);
- if (ctmp->id == n)
- return ctmp;
- }
- return NULL;
- }
- #ifdef OPENSSL_NO_COMP
- STACK_OF(SSL_COMP) *SSL_COMP_get_compression_methods(void)
- {
- return NULL;
- }
- STACK_OF(SSL_COMP) *SSL_COMP_set0_compression_methods(STACK_OF(SSL_COMP)
- *meths)
- {
- return meths;
- }
- int SSL_COMP_add_compression_method(int id, COMP_METHOD *cm)
- {
- return 1;
- }
- #else
- STACK_OF(SSL_COMP) *SSL_COMP_get_compression_methods(void)
- {
- load_builtin_compressions();
- return ssl_comp_methods;
- }
- STACK_OF(SSL_COMP) *SSL_COMP_set0_compression_methods(STACK_OF(SSL_COMP)
- *meths)
- {
- STACK_OF(SSL_COMP) *old_meths = ssl_comp_methods;
- ssl_comp_methods = meths;
- return old_meths;
- }
- static void cmeth_free(SSL_COMP *cm)
- {
- OPENSSL_free(cm);
- }
- void ssl_comp_free_compression_methods_int(void)
- {
- STACK_OF(SSL_COMP) *old_meths = ssl_comp_methods;
- ssl_comp_methods = NULL;
- sk_SSL_COMP_pop_free(old_meths, cmeth_free);
- }
- int SSL_COMP_add_compression_method(int id, COMP_METHOD *cm)
- {
- SSL_COMP *comp;
- if (cm == NULL || COMP_get_type(cm) == NID_undef)
- return 1;
- /*-
- * According to draft-ietf-tls-compression-04.txt, the
- * compression number ranges should be the following:
- *
- * 0 to 63: methods defined by the IETF
- * 64 to 192: external party methods assigned by IANA
- * 193 to 255: reserved for private use
- */
- if (id < 193 || id > 255) {
- ERR_raise(ERR_LIB_SSL, SSL_R_COMPRESSION_ID_NOT_WITHIN_PRIVATE_RANGE);
- return 1;
- }
- comp = OPENSSL_malloc(sizeof(*comp));
- if (comp == NULL)
- return 1;
- comp->id = id;
- comp->method = cm;
- load_builtin_compressions();
- if (ssl_comp_methods && sk_SSL_COMP_find(ssl_comp_methods, comp) >= 0) {
- OPENSSL_free(comp);
- ERR_raise(ERR_LIB_SSL, SSL_R_DUPLICATE_COMPRESSION_ID);
- return 1;
- }
- if (ssl_comp_methods == NULL || !sk_SSL_COMP_push(ssl_comp_methods, comp)) {
- OPENSSL_free(comp);
- ERR_raise(ERR_LIB_SSL, ERR_R_CRYPTO_LIB);
- return 1;
- }
- return 0;
- }
- #endif
- const char *SSL_COMP_get_name(const COMP_METHOD *comp)
- {
- #ifndef OPENSSL_NO_COMP
- return comp ? COMP_get_name(comp) : NULL;
- #else
- return NULL;
- #endif
- }
- const char *SSL_COMP_get0_name(const SSL_COMP *comp)
- {
- #ifndef OPENSSL_NO_COMP
- return comp->name;
- #else
- return NULL;
- #endif
- }
- int SSL_COMP_get_id(const SSL_COMP *comp)
- {
- #ifndef OPENSSL_NO_COMP
- return comp->id;
- #else
- return -1;
- #endif
- }
- const SSL_CIPHER *ssl_get_cipher_by_char(SSL_CONNECTION *s,
- const unsigned char *ptr,
- int all)
- {
- const SSL_CIPHER *c = SSL_CONNECTION_GET_SSL(s)->method->get_cipher_by_char(ptr);
- if (c == NULL || (!all && c->valid == 0))
- return NULL;
- return c;
- }
- const SSL_CIPHER *SSL_CIPHER_find(SSL *ssl, const unsigned char *ptr)
- {
- return ssl->method->get_cipher_by_char(ptr);
- }
- int SSL_CIPHER_get_cipher_nid(const SSL_CIPHER *c)
- {
- int i;
- if (c == NULL)
- return NID_undef;
- i = ssl_cipher_info_lookup(ssl_cipher_table_cipher, c->algorithm_enc);
- if (i == -1)
- return NID_undef;
- return ssl_cipher_table_cipher[i].nid;
- }
- int SSL_CIPHER_get_digest_nid(const SSL_CIPHER *c)
- {
- int i = ssl_cipher_info_lookup(ssl_cipher_table_mac, c->algorithm_mac);
- if (i == -1)
- return NID_undef;
- return ssl_cipher_table_mac[i].nid;
- }
- int SSL_CIPHER_get_kx_nid(const SSL_CIPHER *c)
- {
- int i = ssl_cipher_info_lookup(ssl_cipher_table_kx, c->algorithm_mkey);
- if (i == -1)
- return NID_undef;
- return ssl_cipher_table_kx[i].nid;
- }
- int SSL_CIPHER_get_auth_nid(const SSL_CIPHER *c)
- {
- int i = ssl_cipher_info_lookup(ssl_cipher_table_auth, c->algorithm_auth);
- if (i == -1)
- return NID_undef;
- return ssl_cipher_table_auth[i].nid;
- }
- int ssl_get_md_idx(int md_nid) {
- int i;
- for(i = 0; i < SSL_MD_NUM_IDX; i++) {
- if (md_nid == ssl_cipher_table_mac[i].nid)
- return i;
- }
- return -1;
- }
- const EVP_MD *SSL_CIPHER_get_handshake_digest(const SSL_CIPHER *c)
- {
- int idx = c->algorithm2 & SSL_HANDSHAKE_MAC_MASK;
- if (idx < 0 || idx >= SSL_MD_NUM_IDX)
- return NULL;
- return EVP_get_digestbynid(ssl_cipher_table_mac[idx].nid);
- }
- int SSL_CIPHER_is_aead(const SSL_CIPHER *c)
- {
- return (c->algorithm_mac & SSL_AEAD) ? 1 : 0;
- }
- int ssl_cipher_get_overhead(const SSL_CIPHER *c, size_t *mac_overhead,
- size_t *int_overhead, size_t *blocksize,
- size_t *ext_overhead)
- {
- size_t mac = 0, in = 0, blk = 0, out = 0;
- /* Some hard-coded numbers for the CCM/Poly1305 MAC overhead
- * because there are no handy #defines for those. */
- if (c->algorithm_enc & (SSL_AESGCM | SSL_ARIAGCM)) {
- out = EVP_GCM_TLS_EXPLICIT_IV_LEN + EVP_GCM_TLS_TAG_LEN;
- } else if (c->algorithm_enc & (SSL_AES128CCM | SSL_AES256CCM)) {
- out = EVP_CCM_TLS_EXPLICIT_IV_LEN + 16;
- } else if (c->algorithm_enc & (SSL_AES128CCM8 | SSL_AES256CCM8)) {
- out = EVP_CCM_TLS_EXPLICIT_IV_LEN + 8;
- } else if (c->algorithm_enc & SSL_CHACHA20POLY1305) {
- out = 16;
- } else if (c->algorithm_mac & SSL_AEAD) {
- /* We're supposed to have handled all the AEAD modes above */
- return 0;
- } else {
- /* Non-AEAD modes. Calculate MAC/cipher overhead separately */
- int digest_nid = SSL_CIPHER_get_digest_nid(c);
- const EVP_MD *e_md = EVP_get_digestbynid(digest_nid);
- if (e_md == NULL)
- return 0;
- mac = EVP_MD_get_size(e_md);
- if (c->algorithm_enc != SSL_eNULL) {
- int cipher_nid = SSL_CIPHER_get_cipher_nid(c);
- const EVP_CIPHER *e_ciph = EVP_get_cipherbynid(cipher_nid);
- /* If it wasn't AEAD or SSL_eNULL, we expect it to be a
- known CBC cipher. */
- if (e_ciph == NULL ||
- EVP_CIPHER_get_mode(e_ciph) != EVP_CIPH_CBC_MODE)
- return 0;
- in = 1; /* padding length byte */
- out = EVP_CIPHER_get_iv_length(e_ciph);
- blk = EVP_CIPHER_get_block_size(e_ciph);
- if (blk == 0)
- return 0;
- }
- }
- *mac_overhead = mac;
- *int_overhead = in;
- *blocksize = blk;
- *ext_overhead = out;
- return 1;
- }
- int ssl_cert_is_disabled(SSL_CTX *ctx, size_t idx)
- {
- const SSL_CERT_LOOKUP *cl;
- /* A provider-loaded key type is always enabled */
- if (idx >= SSL_PKEY_NUM)
- return 0;
- cl = ssl_cert_lookup_by_idx(idx, ctx);
- if (cl == NULL || (cl->amask & ctx->disabled_auth_mask) != 0)
- return 1;
- return 0;
- }
- /*
- * Default list of TLSv1.2 (and earlier) ciphers
- * SSL_DEFAULT_CIPHER_LIST deprecated in 3.0.0
- * Update both macro and function simultaneously
- */
- const char *OSSL_default_cipher_list(void)
- {
- return "ALL:!COMPLEMENTOFDEFAULT:!eNULL";
- }
- /*
- * Default list of TLSv1.3 (and later) ciphers
- * TLS_DEFAULT_CIPHERSUITES deprecated in 3.0.0
- * Update both macro and function simultaneously
- */
- const char *OSSL_default_ciphersuites(void)
- {
- return "TLS_AES_256_GCM_SHA384:"
- "TLS_CHACHA20_POLY1305_SHA256:"
- "TLS_AES_128_GCM_SHA256";
- }
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