2162 lines
66 KiB
C
2162 lines
66 KiB
C
/*
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* Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved.
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* Copyright (c) 2002, Oracle and/or its affiliates. All rights reserved
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* Copyright 2005 Nokia. All rights reserved.
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*
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* Licensed under the OpenSSL license (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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#include <stdio.h>
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#include <ctype.h>
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#include <openssl/objects.h>
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#include <openssl/comp.h>
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#include <openssl/engine.h>
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#include <openssl/crypto.h>
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#include <openssl/conf.h>
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#include "internal/nelem.h"
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#include "ssl_locl.h"
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#include "internal/thread_once.h"
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#include "internal/cryptlib.h"
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#define SSL_ENC_DES_IDX 0
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#define SSL_ENC_3DES_IDX 1
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#define SSL_ENC_RC4_IDX 2
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#define SSL_ENC_RC2_IDX 3
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#define SSL_ENC_IDEA_IDX 4
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#define SSL_ENC_NULL_IDX 5
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#define SSL_ENC_AES128_IDX 6
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#define SSL_ENC_AES256_IDX 7
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#define SSL_ENC_CAMELLIA128_IDX 8
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#define SSL_ENC_CAMELLIA256_IDX 9
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#define SSL_ENC_GOST89_IDX 10
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#define SSL_ENC_SEED_IDX 11
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#define SSL_ENC_AES128GCM_IDX 12
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#define SSL_ENC_AES256GCM_IDX 13
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#define SSL_ENC_AES128CCM_IDX 14
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#define SSL_ENC_AES256CCM_IDX 15
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#define SSL_ENC_AES128CCM8_IDX 16
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#define SSL_ENC_AES256CCM8_IDX 17
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#define SSL_ENC_GOST8912_IDX 18
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#define SSL_ENC_CHACHA_IDX 19
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#define SSL_ENC_ARIA128GCM_IDX 20
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#define SSL_ENC_ARIA256GCM_IDX 21
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#define SSL_ENC_NUM_IDX 22
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/* NB: make sure indices in these tables match values above */
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typedef struct {
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uint32_t mask;
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int nid;
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} ssl_cipher_table;
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/* Table of NIDs for each cipher */
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static const ssl_cipher_table ssl_cipher_table_cipher[SSL_ENC_NUM_IDX] = {
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{SSL_DES, NID_des_cbc}, /* SSL_ENC_DES_IDX 0 */
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{SSL_3DES, NID_des_ede3_cbc}, /* SSL_ENC_3DES_IDX 1 */
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{SSL_RC4, NID_rc4}, /* SSL_ENC_RC4_IDX 2 */
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{SSL_RC2, NID_rc2_cbc}, /* SSL_ENC_RC2_IDX 3 */
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{SSL_IDEA, NID_idea_cbc}, /* SSL_ENC_IDEA_IDX 4 */
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{SSL_eNULL, NID_undef}, /* SSL_ENC_NULL_IDX 5 */
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{SSL_AES128, NID_aes_128_cbc}, /* SSL_ENC_AES128_IDX 6 */
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{SSL_AES256, NID_aes_256_cbc}, /* SSL_ENC_AES256_IDX 7 */
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{SSL_CAMELLIA128, NID_camellia_128_cbc}, /* SSL_ENC_CAMELLIA128_IDX 8 */
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{SSL_CAMELLIA256, NID_camellia_256_cbc}, /* SSL_ENC_CAMELLIA256_IDX 9 */
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{SSL_eGOST2814789CNT, NID_gost89_cnt}, /* SSL_ENC_GOST89_IDX 10 */
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{SSL_SEED, NID_seed_cbc}, /* SSL_ENC_SEED_IDX 11 */
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{SSL_AES128GCM, NID_aes_128_gcm}, /* SSL_ENC_AES128GCM_IDX 12 */
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{SSL_AES256GCM, NID_aes_256_gcm}, /* SSL_ENC_AES256GCM_IDX 13 */
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{SSL_AES128CCM, NID_aes_128_ccm}, /* SSL_ENC_AES128CCM_IDX 14 */
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{SSL_AES256CCM, NID_aes_256_ccm}, /* SSL_ENC_AES256CCM_IDX 15 */
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{SSL_AES128CCM8, NID_aes_128_ccm}, /* SSL_ENC_AES128CCM8_IDX 16 */
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{SSL_AES256CCM8, NID_aes_256_ccm}, /* SSL_ENC_AES256CCM8_IDX 17 */
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{SSL_eGOST2814789CNT12, NID_gost89_cnt_12}, /* SSL_ENC_GOST8912_IDX 18 */
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{SSL_CHACHA20POLY1305, NID_chacha20_poly1305}, /* SSL_ENC_CHACHA_IDX 19 */
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{SSL_ARIA128GCM, NID_aria_128_gcm}, /* SSL_ENC_ARIA128GCM_IDX 20 */
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{SSL_ARIA256GCM, NID_aria_256_gcm}, /* SSL_ENC_ARIA256GCM_IDX 21 */
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};
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static const EVP_CIPHER *ssl_cipher_methods[SSL_ENC_NUM_IDX];
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#define SSL_COMP_NULL_IDX 0
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#define SSL_COMP_ZLIB_IDX 1
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#define SSL_COMP_NUM_IDX 2
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static STACK_OF(SSL_COMP) *ssl_comp_methods = NULL;
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#ifndef OPENSSL_NO_COMP
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static CRYPTO_ONCE ssl_load_builtin_comp_once = CRYPTO_ONCE_STATIC_INIT;
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#endif
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/*
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* Constant SSL_MAX_DIGEST equal to size of digests array should be defined
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* in the ssl_locl.h
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*/
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#define SSL_MD_NUM_IDX SSL_MAX_DIGEST
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/* NB: make sure indices in this table matches values above */
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static const ssl_cipher_table ssl_cipher_table_mac[SSL_MD_NUM_IDX] = {
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{SSL_MD5, NID_md5}, /* SSL_MD_MD5_IDX 0 */
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{SSL_SHA1, NID_sha1}, /* SSL_MD_SHA1_IDX 1 */
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{SSL_GOST94, NID_id_GostR3411_94}, /* SSL_MD_GOST94_IDX 2 */
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{SSL_GOST89MAC, NID_id_Gost28147_89_MAC}, /* SSL_MD_GOST89MAC_IDX 3 */
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{SSL_SHA256, NID_sha256}, /* SSL_MD_SHA256_IDX 4 */
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{SSL_SHA384, NID_sha384}, /* SSL_MD_SHA384_IDX 5 */
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{SSL_GOST12_256, NID_id_GostR3411_2012_256}, /* SSL_MD_GOST12_256_IDX 6 */
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{SSL_GOST89MAC12, NID_gost_mac_12}, /* SSL_MD_GOST89MAC12_IDX 7 */
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{SSL_GOST12_512, NID_id_GostR3411_2012_512}, /* SSL_MD_GOST12_512_IDX 8 */
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{0, NID_md5_sha1}, /* SSL_MD_MD5_SHA1_IDX 9 */
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{0, NID_sha224}, /* SSL_MD_SHA224_IDX 10 */
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{0, NID_sha512} /* SSL_MD_SHA512_IDX 11 */
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};
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static const EVP_MD *ssl_digest_methods[SSL_MD_NUM_IDX] = {
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NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL
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};
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/* *INDENT-OFF* */
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static const ssl_cipher_table ssl_cipher_table_kx[] = {
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{SSL_kRSA, NID_kx_rsa},
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{SSL_kECDHE, NID_kx_ecdhe},
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{SSL_kDHE, NID_kx_dhe},
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{SSL_kECDHEPSK, NID_kx_ecdhe_psk},
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{SSL_kDHEPSK, NID_kx_dhe_psk},
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{SSL_kRSAPSK, NID_kx_rsa_psk},
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{SSL_kPSK, NID_kx_psk},
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{SSL_kSRP, NID_kx_srp},
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{SSL_kGOST, NID_kx_gost},
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{SSL_kANY, NID_kx_any}
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};
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static const ssl_cipher_table ssl_cipher_table_auth[] = {
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{SSL_aRSA, NID_auth_rsa},
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{SSL_aECDSA, NID_auth_ecdsa},
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{SSL_aPSK, NID_auth_psk},
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{SSL_aDSS, NID_auth_dss},
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{SSL_aGOST01, NID_auth_gost01},
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{SSL_aGOST12, NID_auth_gost12},
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{SSL_aSRP, NID_auth_srp},
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{SSL_aNULL, NID_auth_null},
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{SSL_aANY, NID_auth_any}
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};
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/* *INDENT-ON* */
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/* Utility function for table lookup */
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static int ssl_cipher_info_find(const ssl_cipher_table * table,
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size_t table_cnt, uint32_t mask)
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{
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size_t i;
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for (i = 0; i < table_cnt; i++, table++) {
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if (table->mask == mask)
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return (int)i;
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}
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return -1;
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}
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#define ssl_cipher_info_lookup(table, x) \
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ssl_cipher_info_find(table, OSSL_NELEM(table), x)
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/*
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* PKEY_TYPE for GOST89MAC is known in advance, but, because implementation
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* is engine-provided, we'll fill it only if corresponding EVP_PKEY_METHOD is
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* found
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*/
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static int ssl_mac_pkey_id[SSL_MD_NUM_IDX] = {
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/* MD5, SHA, GOST94, MAC89 */
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EVP_PKEY_HMAC, EVP_PKEY_HMAC, EVP_PKEY_HMAC, NID_undef,
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/* SHA256, SHA384, GOST2012_256, MAC89-12 */
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EVP_PKEY_HMAC, EVP_PKEY_HMAC, EVP_PKEY_HMAC, NID_undef,
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/* GOST2012_512 */
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EVP_PKEY_HMAC,
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};
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static size_t ssl_mac_secret_size[SSL_MD_NUM_IDX];
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#define CIPHER_ADD 1
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#define CIPHER_KILL 2
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#define CIPHER_DEL 3
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#define CIPHER_ORD 4
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#define CIPHER_SPECIAL 5
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/*
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* Bump the ciphers to the top of the list.
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* This rule isn't currently supported by the public cipherstring API.
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*/
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#define CIPHER_BUMP 6
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typedef struct cipher_order_st {
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const SSL_CIPHER *cipher;
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int active;
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int dead;
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struct cipher_order_st *next, *prev;
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} CIPHER_ORDER;
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static const SSL_CIPHER cipher_aliases[] = {
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/* "ALL" doesn't include eNULL (must be specifically enabled) */
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{0, SSL_TXT_ALL, NULL, 0, 0, 0, ~SSL_eNULL},
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/* "COMPLEMENTOFALL" */
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{0, SSL_TXT_CMPALL, NULL, 0, 0, 0, SSL_eNULL},
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/*
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* "COMPLEMENTOFDEFAULT" (does *not* include ciphersuites not found in
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* ALL!)
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*/
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{0, SSL_TXT_CMPDEF, NULL, 0, 0, 0, 0, 0, 0, 0, 0, 0, SSL_NOT_DEFAULT},
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/*
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* key exchange aliases (some of those using only a single bit here
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* combine multiple key exchange algs according to the RFCs, e.g. kDHE
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* combines DHE_DSS and DHE_RSA)
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*/
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{0, SSL_TXT_kRSA, NULL, 0, SSL_kRSA},
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{0, SSL_TXT_kEDH, NULL, 0, SSL_kDHE},
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{0, SSL_TXT_kDHE, NULL, 0, SSL_kDHE},
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{0, SSL_TXT_DH, NULL, 0, SSL_kDHE},
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{0, SSL_TXT_kEECDH, NULL, 0, SSL_kECDHE},
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{0, SSL_TXT_kECDHE, NULL, 0, SSL_kECDHE},
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{0, SSL_TXT_ECDH, NULL, 0, SSL_kECDHE},
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{0, SSL_TXT_kPSK, NULL, 0, SSL_kPSK},
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{0, SSL_TXT_kRSAPSK, NULL, 0, SSL_kRSAPSK},
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{0, SSL_TXT_kECDHEPSK, NULL, 0, SSL_kECDHEPSK},
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{0, SSL_TXT_kDHEPSK, NULL, 0, SSL_kDHEPSK},
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{0, SSL_TXT_kSRP, NULL, 0, SSL_kSRP},
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{0, SSL_TXT_kGOST, NULL, 0, SSL_kGOST},
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/* server authentication aliases */
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{0, SSL_TXT_aRSA, NULL, 0, 0, SSL_aRSA},
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{0, SSL_TXT_aDSS, NULL, 0, 0, SSL_aDSS},
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{0, SSL_TXT_DSS, NULL, 0, 0, SSL_aDSS},
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{0, SSL_TXT_aNULL, NULL, 0, 0, SSL_aNULL},
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{0, SSL_TXT_aECDSA, NULL, 0, 0, SSL_aECDSA},
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{0, SSL_TXT_ECDSA, NULL, 0, 0, SSL_aECDSA},
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{0, SSL_TXT_aPSK, NULL, 0, 0, SSL_aPSK},
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{0, SSL_TXT_aGOST01, NULL, 0, 0, SSL_aGOST01},
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{0, SSL_TXT_aGOST12, NULL, 0, 0, SSL_aGOST12},
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{0, SSL_TXT_aGOST, NULL, 0, 0, SSL_aGOST01 | SSL_aGOST12},
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{0, SSL_TXT_aSRP, NULL, 0, 0, SSL_aSRP},
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/* aliases combining key exchange and server authentication */
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{0, SSL_TXT_EDH, NULL, 0, SSL_kDHE, ~SSL_aNULL},
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{0, SSL_TXT_DHE, NULL, 0, SSL_kDHE, ~SSL_aNULL},
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{0, SSL_TXT_EECDH, NULL, 0, SSL_kECDHE, ~SSL_aNULL},
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{0, SSL_TXT_ECDHE, NULL, 0, SSL_kECDHE, ~SSL_aNULL},
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{0, SSL_TXT_NULL, NULL, 0, 0, 0, SSL_eNULL},
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{0, SSL_TXT_RSA, NULL, 0, SSL_kRSA, SSL_aRSA},
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{0, SSL_TXT_ADH, NULL, 0, SSL_kDHE, SSL_aNULL},
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{0, SSL_TXT_AECDH, NULL, 0, SSL_kECDHE, SSL_aNULL},
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{0, SSL_TXT_PSK, NULL, 0, SSL_PSK},
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{0, SSL_TXT_SRP, NULL, 0, SSL_kSRP},
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/* symmetric encryption aliases */
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{0, SSL_TXT_3DES, NULL, 0, 0, 0, SSL_3DES},
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{0, SSL_TXT_RC4, NULL, 0, 0, 0, SSL_RC4},
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{0, SSL_TXT_RC2, NULL, 0, 0, 0, SSL_RC2},
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{0, SSL_TXT_IDEA, NULL, 0, 0, 0, SSL_IDEA},
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{0, SSL_TXT_SEED, NULL, 0, 0, 0, SSL_SEED},
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{0, SSL_TXT_eNULL, NULL, 0, 0, 0, SSL_eNULL},
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{0, SSL_TXT_GOST, NULL, 0, 0, 0, SSL_eGOST2814789CNT | SSL_eGOST2814789CNT12},
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{0, SSL_TXT_AES128, NULL, 0, 0, 0,
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SSL_AES128 | SSL_AES128GCM | SSL_AES128CCM | SSL_AES128CCM8},
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{0, SSL_TXT_AES256, NULL, 0, 0, 0,
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SSL_AES256 | SSL_AES256GCM | SSL_AES256CCM | SSL_AES256CCM8},
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{0, SSL_TXT_AES, NULL, 0, 0, 0, SSL_AES},
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{0, SSL_TXT_AES_GCM, NULL, 0, 0, 0, SSL_AES128GCM | SSL_AES256GCM},
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{0, SSL_TXT_AES_CCM, NULL, 0, 0, 0,
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SSL_AES128CCM | SSL_AES256CCM | SSL_AES128CCM8 | SSL_AES256CCM8},
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{0, SSL_TXT_AES_CCM_8, NULL, 0, 0, 0, SSL_AES128CCM8 | SSL_AES256CCM8},
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{0, SSL_TXT_CAMELLIA128, NULL, 0, 0, 0, SSL_CAMELLIA128},
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{0, SSL_TXT_CAMELLIA256, NULL, 0, 0, 0, SSL_CAMELLIA256},
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{0, SSL_TXT_CAMELLIA, NULL, 0, 0, 0, SSL_CAMELLIA},
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{0, SSL_TXT_CHACHA20, NULL, 0, 0, 0, SSL_CHACHA20},
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{0, SSL_TXT_ARIA, NULL, 0, 0, 0, SSL_ARIA},
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{0, SSL_TXT_ARIA_GCM, NULL, 0, 0, 0, SSL_ARIA128GCM | SSL_ARIA256GCM},
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{0, SSL_TXT_ARIA128, NULL, 0, 0, 0, SSL_ARIA128GCM},
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{0, SSL_TXT_ARIA256, NULL, 0, 0, 0, SSL_ARIA256GCM},
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/* MAC aliases */
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{0, SSL_TXT_MD5, NULL, 0, 0, 0, 0, SSL_MD5},
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{0, SSL_TXT_SHA1, NULL, 0, 0, 0, 0, SSL_SHA1},
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{0, SSL_TXT_SHA, NULL, 0, 0, 0, 0, SSL_SHA1},
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{0, SSL_TXT_GOST94, NULL, 0, 0, 0, 0, SSL_GOST94},
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{0, SSL_TXT_GOST89MAC, NULL, 0, 0, 0, 0, SSL_GOST89MAC | SSL_GOST89MAC12},
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{0, SSL_TXT_SHA256, NULL, 0, 0, 0, 0, SSL_SHA256},
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{0, SSL_TXT_SHA384, NULL, 0, 0, 0, 0, SSL_SHA384},
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{0, SSL_TXT_GOST12, NULL, 0, 0, 0, 0, SSL_GOST12_256},
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/* protocol version aliases */
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{0, SSL_TXT_SSLV3, NULL, 0, 0, 0, 0, 0, SSL3_VERSION},
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{0, SSL_TXT_TLSV1, NULL, 0, 0, 0, 0, 0, TLS1_VERSION},
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{0, "TLSv1.0", NULL, 0, 0, 0, 0, 0, TLS1_VERSION},
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{0, SSL_TXT_TLSV1_2, NULL, 0, 0, 0, 0, 0, TLS1_2_VERSION},
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/* strength classes */
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{0, SSL_TXT_LOW, NULL, 0, 0, 0, 0, 0, 0, 0, 0, 0, SSL_LOW},
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{0, SSL_TXT_MEDIUM, NULL, 0, 0, 0, 0, 0, 0, 0, 0, 0, SSL_MEDIUM},
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{0, SSL_TXT_HIGH, NULL, 0, 0, 0, 0, 0, 0, 0, 0, 0, SSL_HIGH},
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/* FIPS 140-2 approved ciphersuite */
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{0, SSL_TXT_FIPS, NULL, 0, 0, 0, ~SSL_eNULL, 0, 0, 0, 0, 0, SSL_FIPS},
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/* "EDH-" aliases to "DHE-" labels (for backward compatibility) */
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{0, SSL3_TXT_EDH_DSS_DES_192_CBC3_SHA, NULL, 0,
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SSL_kDHE, SSL_aDSS, SSL_3DES, SSL_SHA1, 0, 0, 0, 0, SSL_HIGH | SSL_FIPS},
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{0, SSL3_TXT_EDH_RSA_DES_192_CBC3_SHA, NULL, 0,
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SSL_kDHE, SSL_aRSA, SSL_3DES, SSL_SHA1, 0, 0, 0, 0, SSL_HIGH | SSL_FIPS},
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};
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/*
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* Search for public key algorithm with given name and return its pkey_id if
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* it is available. Otherwise return 0
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*/
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#ifdef OPENSSL_NO_ENGINE
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static int get_optional_pkey_id(const char *pkey_name)
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{
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const EVP_PKEY_ASN1_METHOD *ameth;
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int pkey_id = 0;
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ameth = EVP_PKEY_asn1_find_str(NULL, pkey_name, -1);
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if (ameth && EVP_PKEY_asn1_get0_info(&pkey_id, NULL, NULL, NULL, NULL,
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ameth) > 0)
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return pkey_id;
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return 0;
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}
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#else
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static int get_optional_pkey_id(const char *pkey_name)
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{
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const EVP_PKEY_ASN1_METHOD *ameth;
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ENGINE *tmpeng = NULL;
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int pkey_id = 0;
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ameth = EVP_PKEY_asn1_find_str(&tmpeng, pkey_name, -1);
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if (ameth) {
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if (EVP_PKEY_asn1_get0_info(&pkey_id, NULL, NULL, NULL, NULL,
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ameth) <= 0)
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pkey_id = 0;
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}
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ENGINE_finish(tmpeng);
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return pkey_id;
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}
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#endif
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/* masks of disabled algorithms */
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static uint32_t disabled_enc_mask;
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static uint32_t disabled_mac_mask;
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static uint32_t disabled_mkey_mask;
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static uint32_t disabled_auth_mask;
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int ssl_load_ciphers(void)
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{
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size_t i;
|
|
const ssl_cipher_table *t;
|
|
|
|
disabled_enc_mask = 0;
|
|
ssl_sort_cipher_list();
|
|
for (i = 0, t = ssl_cipher_table_cipher; i < SSL_ENC_NUM_IDX; i++, t++) {
|
|
if (t->nid == NID_undef) {
|
|
ssl_cipher_methods[i] = NULL;
|
|
} else {
|
|
const EVP_CIPHER *cipher = EVP_get_cipherbynid(t->nid);
|
|
ssl_cipher_methods[i] = cipher;
|
|
if (cipher == NULL)
|
|
disabled_enc_mask |= t->mask;
|
|
}
|
|
}
|
|
disabled_mac_mask = 0;
|
|
for (i = 0, t = ssl_cipher_table_mac; i < SSL_MD_NUM_IDX; i++, t++) {
|
|
const EVP_MD *md = EVP_get_digestbynid(t->nid);
|
|
ssl_digest_methods[i] = md;
|
|
if (md == NULL) {
|
|
disabled_mac_mask |= t->mask;
|
|
} else {
|
|
int tmpsize = EVP_MD_size(md);
|
|
if (!ossl_assert(tmpsize >= 0))
|
|
return 0;
|
|
ssl_mac_secret_size[i] = tmpsize;
|
|
}
|
|
}
|
|
/* Make sure we can access MD5 and SHA1 */
|
|
if (!ossl_assert(ssl_digest_methods[SSL_MD_MD5_IDX] != NULL))
|
|
return 0;
|
|
if (!ossl_assert(ssl_digest_methods[SSL_MD_SHA1_IDX] != NULL))
|
|
return 0;
|
|
|
|
disabled_mkey_mask = 0;
|
|
disabled_auth_mask = 0;
|
|
|
|
#ifdef OPENSSL_NO_RSA
|
|
disabled_mkey_mask |= SSL_kRSA | SSL_kRSAPSK;
|
|
disabled_auth_mask |= SSL_aRSA;
|
|
#endif
|
|
#ifdef OPENSSL_NO_DSA
|
|
disabled_auth_mask |= SSL_aDSS;
|
|
#endif
|
|
#ifdef OPENSSL_NO_DH
|
|
disabled_mkey_mask |= SSL_kDHE | SSL_kDHEPSK;
|
|
#endif
|
|
#ifdef OPENSSL_NO_EC
|
|
disabled_mkey_mask |= SSL_kECDHE | SSL_kECDHEPSK;
|
|
disabled_auth_mask |= SSL_aECDSA;
|
|
#endif
|
|
#ifdef OPENSSL_NO_PSK
|
|
disabled_mkey_mask |= SSL_PSK;
|
|
disabled_auth_mask |= SSL_aPSK;
|
|
#endif
|
|
#ifdef OPENSSL_NO_SRP
|
|
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
|
|
*/
|
|
ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX] = get_optional_pkey_id("gost-mac");
|
|
if (ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX])
|
|
ssl_mac_secret_size[SSL_MD_GOST89MAC_IDX] = 32;
|
|
else
|
|
disabled_mac_mask |= SSL_GOST89MAC;
|
|
|
|
ssl_mac_pkey_id[SSL_MD_GOST89MAC12_IDX] =
|
|
get_optional_pkey_id("gost-mac-12");
|
|
if (ssl_mac_pkey_id[SSL_MD_GOST89MAC12_IDX])
|
|
ssl_mac_secret_size[SSL_MD_GOST89MAC12_IDX] = 32;
|
|
else
|
|
disabled_mac_mask |= SSL_GOST89MAC12;
|
|
|
|
if (!get_optional_pkey_id("gost2001"))
|
|
disabled_auth_mask |= SSL_aGOST01 | SSL_aGOST12;
|
|
if (!get_optional_pkey_id("gost2012_256"))
|
|
disabled_auth_mask |= SSL_aGOST12;
|
|
if (!get_optional_pkey_id("gost2012_512"))
|
|
disabled_auth_mask |= SSL_aGOST12;
|
|
/*
|
|
* Disable GOST key exchange if no GOST signature algs are available *
|
|
*/
|
|
if ((disabled_auth_mask & (SSL_aGOST01 | SSL_aGOST12)) ==
|
|
(SSL_aGOST01 | SSL_aGOST12))
|
|
disabled_mkey_mask |= SSL_kGOST;
|
|
|
|
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();
|
|
|
|
CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_DISABLE);
|
|
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);
|
|
sk_SSL_COMP_push(ssl_comp_methods, comp);
|
|
sk_SSL_COMP_sort(ssl_comp_methods);
|
|
}
|
|
}
|
|
CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ENABLE);
|
|
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(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);
|
|
*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;
|
|
|
|
i = ssl_cipher_info_lookup(ssl_cipher_table_cipher, c->algorithm_enc);
|
|
|
|
if (i == -1) {
|
|
*enc = NULL;
|
|
} else {
|
|
if (i == SSL_ENC_NULL_IDX)
|
|
*enc = EVP_enc_null();
|
|
else
|
|
*enc = ssl_cipher_methods[i];
|
|
}
|
|
|
|
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 {
|
|
*md = ssl_digest_methods[i];
|
|
if (mac_pkey_type != NULL)
|
|
*mac_pkey_type = ssl_mac_pkey_id[i];
|
|
if (mac_secret_size != NULL)
|
|
*mac_secret_size = ssl_mac_secret_size[i];
|
|
}
|
|
|
|
if ((*enc != NULL) &&
|
|
(*md != NULL || (EVP_CIPHER_flags(*enc) & EVP_CIPH_FLAG_AEAD_CIPHER))
|
|
&& (!mac_pkey_type || *mac_pkey_type != NID_undef)) {
|
|
const EVP_CIPHER *evp;
|
|
|
|
if (use_etm)
|
|
return 1;
|
|
|
|
if (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 = EVP_get_cipherbyname("RC4-HMAC-MD5")))
|
|
*enc = evp, *md = NULL;
|
|
else if (c->algorithm_enc == SSL_AES128 &&
|
|
c->algorithm_mac == SSL_SHA1 &&
|
|
(evp = EVP_get_cipherbyname("AES-128-CBC-HMAC-SHA1")))
|
|
*enc = evp, *md = NULL;
|
|
else if (c->algorithm_enc == SSL_AES256 &&
|
|
c->algorithm_mac == SSL_SHA1 &&
|
|
(evp = EVP_get_cipherbyname("AES-256-CBC-HMAC-SHA1")))
|
|
*enc = evp, *md = NULL;
|
|
else if (c->algorithm_enc == SSL_AES128 &&
|
|
c->algorithm_mac == SSL_SHA256 &&
|
|
(evp = EVP_get_cipherbyname("AES-128-CBC-HMAC-SHA256")))
|
|
*enc = evp, *md = NULL;
|
|
else if (c->algorithm_enc == SSL_AES256 &&
|
|
c->algorithm_mac == SSL_SHA256 &&
|
|
(evp = EVP_get_cipherbyname("AES-256-CBC-HMAC-SHA256")))
|
|
*enc = evp, *md = NULL;
|
|
return 1;
|
|
} else {
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
const EVP_MD *ssl_md(int idx)
|
|
{
|
|
idx &= SSL_HANDSHAKE_MAC_MASK;
|
|
if (idx < 0 || idx >= SSL_MD_NUM_IDX)
|
|
return NULL;
|
|
return ssl_digest_methods[idx];
|
|
}
|
|
|
|
const EVP_MD *ssl_handshake_md(SSL *s)
|
|
{
|
|
return ssl_md(ssl_get_algorithm2(s));
|
|
}
|
|
|
|
const EVP_MD *ssl_prf_md(SSL *s)
|
|
{
|
|
return ssl_md(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;
|
|
|
|
#ifdef CIPHER_DEBUG
|
|
fprintf(stderr,
|
|
"Applying rule %d with %08x/%08x/%08x/%08x/%08x %08x (%d)\n",
|
|
rule, alg_mkey, alg_auth, alg_enc, alg_mac, min_tls,
|
|
algo_strength, strength_bits);
|
|
#endif
|
|
|
|
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 {
|
|
#ifdef CIPHER_DEBUG
|
|
fprintf(stderr,
|
|
"\nName: %s:\nAlgo = %08x/%08x/%08x/%08x/%08x Algo_strength = %08x\n",
|
|
cp->name, cp->algorithm_mkey, cp->algorithm_auth,
|
|
cp->algorithm_enc, cp->algorithm_mac, cp->min_tls,
|
|
cp->algo_strength);
|
|
#endif
|
|
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;
|
|
}
|
|
|
|
#ifdef CIPHER_DEBUG
|
|
fprintf(stderr, "Action = %d\n", rule);
|
|
#endif
|
|
|
|
/* 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;
|
|
}
|
|
|
|
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) {
|
|
SSLerr(SSL_F_SSL_CIPHER_STRENGTH_SORT, ERR_R_MALLOC_FAILURE);
|
|
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 == '='))
|
|
#else
|
|
while (isalnum((unsigned char)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.
|
|
*/
|
|
SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR, SSL_R_INVALID_COMMAND);
|
|
retval = found = 0;
|
|
l++;
|
|
break;
|
|
}
|
|
|
|
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
|
|
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) && strncmp(buf, "STRENGTH", 8) == 0) {
|
|
ok = ssl_cipher_strength_sort(head_p, tail_p);
|
|
} else if (buflen == 10 && strncmp(buf, "SECLEVEL=", 9) == 0) {
|
|
int level = buf[9] - '0';
|
|
if (level < 0 || level > 5) {
|
|
SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR,
|
|
SSL_R_INVALID_COMMAND);
|
|
} else {
|
|
c->sec_level = level;
|
|
ok = 1;
|
|
}
|
|
} else {
|
|
SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR, 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;
|
|
}
|
|
|
|
#ifndef OPENSSL_NO_EC
|
|
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 (strncmp(*prule_str, "SUITEB128ONLY", 13) == 0) {
|
|
suiteb_flags = SSL_CERT_FLAG_SUITEB_128_LOS_ONLY;
|
|
} else if (strncmp(*prule_str, "SUITEB128C2", 11) == 0) {
|
|
suiteb_comb2 = 1;
|
|
suiteb_flags = SSL_CERT_FLAG_SUITEB_128_LOS;
|
|
} else if (strncmp(*prule_str, "SUITEB128", 9) == 0) {
|
|
suiteb_flags = SSL_CERT_FLAG_SUITEB_128_LOS;
|
|
} else if (strncmp(*prule_str, "SUITEB192", 9) == 0) {
|
|
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)) {
|
|
SSLerr(SSL_F_CHECK_SUITEB_CIPHER_LIST,
|
|
SSL_R_AT_LEAST_TLS_1_2_NEEDED_IN_SUITEB_MODE);
|
|
return 0;
|
|
}
|
|
# ifndef OPENSSL_NO_EC
|
|
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;
|
|
# else
|
|
SSLerr(SSL_F_CHECK_SUITEB_CIPHER_LIST, SSL_R_ECDH_REQUIRED_FOR_SUITEB_MODE);
|
|
return 0;
|
|
# endif
|
|
}
|
|
#endif
|
|
|
|
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)) {
|
|
SSLerr(SSL_F_CIPHERSUITE_CB, SSL_R_NO_CIPHER_MATCH);
|
|
return 0;
|
|
}
|
|
|
|
memcpy(name, elem, len);
|
|
name[len] = '\0';
|
|
|
|
cipher = ssl3_get_cipher_by_std_name(name);
|
|
if (cipher == NULL) {
|
|
SSLerr(SSL_F_CIPHERSUITE_CB, SSL_R_NO_CIPHER_MATCH);
|
|
return 0;
|
|
}
|
|
|
|
if (!sk_SSL_CIPHER_push(ciphersuites, cipher)) {
|
|
SSLerr(SSL_F_CIPHERSUITE_CB, 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)) {
|
|
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(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)
|
|
sk_SSL_CIPHER_delete(tmp_cipher_list, 0);
|
|
|
|
/* Insert the new TLSv1.3 ciphersuites */
|
|
for (i = 0; i < sk_SSL_CIPHER_num(tls13_ciphersuites); i++)
|
|
sk_SSL_CIPHER_insert(tmp_cipher_list,
|
|
sk_SSL_CIPHER_value(tls13_ciphersuites, i), i);
|
|
|
|
if (!update_cipher_list_by_id(cipher_list_by_id, 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) {
|
|
/* We already have a cipher_list, so we need to update it */
|
|
return update_cipher_list(&ctx->cipher_list, &ctx->cipher_list_by_id,
|
|
ctx->tls13_ciphersuites);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
int SSL_set_ciphersuites(SSL *s, const char *str)
|
|
{
|
|
int ret = set_ciphersuites(&(s->tls13_ciphersuites), str);
|
|
|
|
if (ret && s->cipher_list != NULL) {
|
|
/* We already have a cipher_list, so we need to update it */
|
|
return update_cipher_list(&s->cipher_list, &s->cipher_list_by_id,
|
|
s->tls13_ciphersuites);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
STACK_OF(SSL_CIPHER) *ssl_create_cipher_list(const SSL_METHOD *ssl_method,
|
|
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;
|
|
|
|
/*
|
|
* Return with error if nothing to do.
|
|
*/
|
|
if (rule_str == NULL || cipher_list == NULL || cipher_list_by_id == NULL)
|
|
return NULL;
|
|
#ifndef OPENSSL_NO_EC
|
|
if (!check_suiteb_cipher_list(ssl_method, c, &rule_str))
|
|
return NULL;
|
|
#endif
|
|
|
|
/*
|
|
* 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 = disabled_mkey_mask;
|
|
disabled_auth = disabled_auth_mask;
|
|
disabled_enc = disabled_enc_mask;
|
|
disabled_mac = 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();
|
|
|
|
co_list = OPENSSL_malloc(sizeof(*co_list) * num_of_ciphers);
|
|
if (co_list == NULL) {
|
|
SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST, ERR_R_MALLOC_FAILURE);
|
|
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.
|
|
* TODO(openssl-team): is there an easier way to accomplish all this?
|
|
*/
|
|
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);
|
|
SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST, ERR_R_MALLOC_FAILURE);
|
|
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 (strncmp(rule_str, "DEFAULT", 7) == 0) {
|
|
ok = ssl_cipher_process_rulestr(SSL_DEFAULT_CIPHER_LIST,
|
|
&head, &tail, ca_list, c);
|
|
rule_p += 7;
|
|
if (*rule_p == ':')
|
|
rule_p++;
|
|
}
|
|
|
|
if (ok && (strlen(rule_p) > 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++) {
|
|
if (!sk_SSL_CIPHER_push(cipherstack,
|
|
sk_SSL_CIPHER_value(tls13_ciphersuites, i))) {
|
|
sk_SSL_CIPHER_free(cipherstack);
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* 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);
|
|
return NULL;
|
|
}
|
|
#ifdef CIPHER_DEBUG
|
|
fprintf(stderr, "<%s>\n", curr->cipher->name);
|
|
#endif
|
|
}
|
|
}
|
|
OPENSSL_free(co_list); /* Not needed any longer */
|
|
|
|
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 *format = "%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s\n";
|
|
|
|
if (buf == NULL) {
|
|
len = 128;
|
|
if ((buf = OPENSSL_malloc(len)) == NULL) {
|
|
SSLerr(SSL_F_SSL_CIPHER_DESCRIPTION, ERR_R_MALLOC_FAILURE);
|
|
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_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_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) {
|
|
SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,
|
|
SSL_R_COMPRESSION_ID_NOT_WITHIN_PRIVATE_RANGE);
|
|
return 1;
|
|
}
|
|
|
|
CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_DISABLE);
|
|
comp = OPENSSL_malloc(sizeof(*comp));
|
|
if (comp == NULL) {
|
|
CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ENABLE);
|
|
SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD, ERR_R_MALLOC_FAILURE);
|
|
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);
|
|
CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ENABLE);
|
|
SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,
|
|
SSL_R_DUPLICATE_COMPRESSION_ID);
|
|
return 1;
|
|
}
|
|
if (ssl_comp_methods == NULL || !sk_SSL_COMP_push(ssl_comp_methods, comp)) {
|
|
OPENSSL_free(comp);
|
|
CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ENABLE);
|
|
SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD, ERR_R_MALLOC_FAILURE);
|
|
return 1;
|
|
}
|
|
CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ENABLE);
|
|
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 *ssl, const unsigned char *ptr,
|
|
int all)
|
|
{
|
|
const SSL_CIPHER *c = ssl->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;
|
|
}
|
|
|
|
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 ssl_digest_methods[idx];
|
|
}
|
|
|
|
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_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_mode(e_ciph) != EVP_CIPH_CBC_MODE)
|
|
return 0;
|
|
|
|
in = 1; /* padding length byte */
|
|
out = EVP_CIPHER_iv_length(e_ciph);
|
|
blk = EVP_CIPHER_block_size(e_ciph);
|
|
}
|
|
}
|
|
|
|
*mac_overhead = mac;
|
|
*int_overhead = in;
|
|
*blocksize = blk;
|
|
*ext_overhead = out;
|
|
|
|
return 1;
|
|
}
|
|
|
|
int ssl_cert_is_disabled(size_t idx)
|
|
{
|
|
const SSL_CERT_LOOKUP *cl = ssl_cert_lookup_by_idx(idx);
|
|
|
|
if (cl == NULL || (cl->amask & disabled_auth_mask) != 0)
|
|
return 1;
|
|
return 0;
|
|
}
|