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- /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
- * All rights reserved.
- *
- * This package is an SSL implementation written
- * by Eric Young (eay@cryptsoft.com).
- * The implementation was written so as to conform with Netscapes SSL.
- *
- * This library is free for commercial and non-commercial use as long as
- * the following conditions are aheared to. The following conditions
- * apply to all code found in this distribution, be it the RC4, RSA,
- * lhash, DES, etc., code; not just the SSL code. The SSL documentation
- * included with this distribution is covered by the same copyright terms
- * except that the holder is Tim Hudson (tjh@cryptsoft.com).
- *
- * Copyright remains Eric Young's, and as such any Copyright notices in
- * the code are not to be removed.
- * If this package is used in a product, Eric Young should be given attribution
- * as the author of the parts of the library used.
- * This can be in the form of a textual message at program startup or
- * in documentation (online or textual) provided with the package.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * "This product includes cryptographic software written by
- * Eric Young (eay@cryptsoft.com)"
- * The word 'cryptographic' can be left out if the rouines from the library
- * being used are not cryptographic related :-).
- * 4. If you include any Windows specific code (or a derivative thereof) from
- * the apps directory (application code) you must include an acknowledgement:
- * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
- *
- * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * The licence and distribution terms for any publically available version or
- * derivative of this code cannot be changed. i.e. this code cannot simply be
- * copied and put under another distribution licence
- * [including the GNU Public Licence.]
- */
- /* ====================================================================
- * Copyright (c) 1998-2007 The OpenSSL Project. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- *
- * 3. All advertising materials mentioning features or use of this
- * software must display the following acknowledgment:
- * "This product includes software developed by the OpenSSL Project
- * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
- *
- * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
- * endorse or promote products derived from this software without
- * prior written permission. For written permission, please contact
- * openssl-core@openssl.org.
- *
- * 5. Products derived from this software may not be called "OpenSSL"
- * nor may "OpenSSL" appear in their names without prior written
- * permission of the OpenSSL Project.
- *
- * 6. Redistributions of any form whatsoever must retain the following
- * acknowledgment:
- * "This product includes software developed by the OpenSSL Project
- * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
- *
- * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
- * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
- * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
- * OF THE POSSIBILITY OF SUCH DAMAGE.
- * ====================================================================
- *
- * This product includes cryptographic software written by Eric Young
- * (eay@cryptsoft.com). This product includes software written by Tim
- * Hudson (tjh@cryptsoft.com).
- *
- */
- /* ====================================================================
- * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
- * ECC cipher suite support in OpenSSL originally developed by
- * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
- */
- /* ====================================================================
- * Copyright 2005 Nokia. All rights reserved.
- *
- * The portions of the attached software ("Contribution") is developed by
- * Nokia Corporation and is licensed pursuant to the OpenSSL open source
- * license.
- *
- * The Contribution, originally written by Mika Kousa and Pasi Eronen of
- * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
- * support (see RFC 4279) to OpenSSL.
- *
- * No patent licenses or other rights except those expressly stated in
- * the OpenSSL open source license shall be deemed granted or received
- * expressly, by implication, estoppel, or otherwise.
- *
- * No assurances are provided by Nokia that the Contribution does not
- * infringe the patent or other intellectual property rights of any third
- * party or that the license provides you with all the necessary rights
- * to make use of the Contribution.
- *
- * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
- * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
- * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
- * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
- * OTHERWISE. */
-
- #include <openssl/ssl.h>
-
- #include <assert.h>
- #include <string.h>
-
- #include <openssl/buf.h>
- #include <openssl/err.h>
- #include <openssl/md5.h>
- #include <openssl/mem.h>
- #include <openssl/sha.h>
- #include <openssl/stack.h>
-
- #include "internal.h"
- #include "../crypto/internal.h"
-
-
- /* kCiphers is an array of all supported ciphers, sorted by id. */
- static const SSL_CIPHER kCiphers[] = {
- /* The RSA ciphers */
- /* Cipher 02 */
- {
- SSL3_TXT_RSA_NULL_SHA,
- SSL3_CK_RSA_NULL_SHA,
- SSL_kRSA,
- SSL_aRSA,
- SSL_eNULL,
- SSL_SHA1,
- SSL_HANDSHAKE_MAC_DEFAULT,
- },
-
- /* Cipher 0A */
- {
- SSL3_TXT_RSA_DES_192_CBC3_SHA,
- SSL3_CK_RSA_DES_192_CBC3_SHA,
- SSL_kRSA,
- SSL_aRSA,
- SSL_3DES,
- SSL_SHA1,
- SSL_HANDSHAKE_MAC_DEFAULT,
- },
-
-
- /* New AES ciphersuites */
-
- /* Cipher 2F */
- {
- TLS1_TXT_RSA_WITH_AES_128_SHA,
- TLS1_CK_RSA_WITH_AES_128_SHA,
- SSL_kRSA,
- SSL_aRSA,
- SSL_AES128,
- SSL_SHA1,
- SSL_HANDSHAKE_MAC_DEFAULT,
- },
-
- /* Cipher 33 */
- {
- TLS1_TXT_DHE_RSA_WITH_AES_128_SHA,
- TLS1_CK_DHE_RSA_WITH_AES_128_SHA,
- SSL_kDHE,
- SSL_aRSA,
- SSL_AES128,
- SSL_SHA1,
- SSL_HANDSHAKE_MAC_DEFAULT,
- },
-
- /* Cipher 35 */
- {
- TLS1_TXT_RSA_WITH_AES_256_SHA,
- TLS1_CK_RSA_WITH_AES_256_SHA,
- SSL_kRSA,
- SSL_aRSA,
- SSL_AES256,
- SSL_SHA1,
- SSL_HANDSHAKE_MAC_DEFAULT,
- },
-
- /* Cipher 39 */
- {
- TLS1_TXT_DHE_RSA_WITH_AES_256_SHA,
- TLS1_CK_DHE_RSA_WITH_AES_256_SHA,
- SSL_kDHE,
- SSL_aRSA,
- SSL_AES256,
- SSL_SHA1,
- SSL_HANDSHAKE_MAC_DEFAULT,
- },
-
-
- /* TLS v1.2 ciphersuites */
-
- /* Cipher 3C */
- {
- TLS1_TXT_RSA_WITH_AES_128_SHA256,
- TLS1_CK_RSA_WITH_AES_128_SHA256,
- SSL_kRSA,
- SSL_aRSA,
- SSL_AES128,
- SSL_SHA256,
- SSL_HANDSHAKE_MAC_SHA256,
- },
-
- /* Cipher 3D */
- {
- TLS1_TXT_RSA_WITH_AES_256_SHA256,
- TLS1_CK_RSA_WITH_AES_256_SHA256,
- SSL_kRSA,
- SSL_aRSA,
- SSL_AES256,
- SSL_SHA256,
- SSL_HANDSHAKE_MAC_SHA256,
- },
-
- /* Cipher 67 */
- {
- TLS1_TXT_DHE_RSA_WITH_AES_128_SHA256,
- TLS1_CK_DHE_RSA_WITH_AES_128_SHA256,
- SSL_kDHE,
- SSL_aRSA,
- SSL_AES128,
- SSL_SHA256,
- SSL_HANDSHAKE_MAC_SHA256,
- },
-
- /* Cipher 6B */
- {
- TLS1_TXT_DHE_RSA_WITH_AES_256_SHA256,
- TLS1_CK_DHE_RSA_WITH_AES_256_SHA256,
- SSL_kDHE,
- SSL_aRSA,
- SSL_AES256,
- SSL_SHA256,
- SSL_HANDSHAKE_MAC_SHA256,
- },
-
- /* PSK cipher suites. */
-
- /* Cipher 8C */
- {
- TLS1_TXT_PSK_WITH_AES_128_CBC_SHA,
- TLS1_CK_PSK_WITH_AES_128_CBC_SHA,
- SSL_kPSK,
- SSL_aPSK,
- SSL_AES128,
- SSL_SHA1,
- SSL_HANDSHAKE_MAC_DEFAULT,
- },
-
- /* Cipher 8D */
- {
- TLS1_TXT_PSK_WITH_AES_256_CBC_SHA,
- TLS1_CK_PSK_WITH_AES_256_CBC_SHA,
- SSL_kPSK,
- SSL_aPSK,
- SSL_AES256,
- SSL_SHA1,
- SSL_HANDSHAKE_MAC_DEFAULT,
- },
-
- /* GCM ciphersuites from RFC5288 */
-
- /* Cipher 9C */
- {
- TLS1_TXT_RSA_WITH_AES_128_GCM_SHA256,
- TLS1_CK_RSA_WITH_AES_128_GCM_SHA256,
- SSL_kRSA,
- SSL_aRSA,
- SSL_AES128GCM,
- SSL_AEAD,
- SSL_HANDSHAKE_MAC_SHA256,
- },
-
- /* Cipher 9D */
- {
- TLS1_TXT_RSA_WITH_AES_256_GCM_SHA384,
- TLS1_CK_RSA_WITH_AES_256_GCM_SHA384,
- SSL_kRSA,
- SSL_aRSA,
- SSL_AES256GCM,
- SSL_AEAD,
- SSL_HANDSHAKE_MAC_SHA384,
- },
-
- /* Cipher 9E */
- {
- TLS1_TXT_DHE_RSA_WITH_AES_128_GCM_SHA256,
- TLS1_CK_DHE_RSA_WITH_AES_128_GCM_SHA256,
- SSL_kDHE,
- SSL_aRSA,
- SSL_AES128GCM,
- SSL_AEAD,
- SSL_HANDSHAKE_MAC_SHA256,
- },
-
- /* Cipher 9F */
- {
- TLS1_TXT_DHE_RSA_WITH_AES_256_GCM_SHA384,
- TLS1_CK_DHE_RSA_WITH_AES_256_GCM_SHA384,
- SSL_kDHE,
- SSL_aRSA,
- SSL_AES256GCM,
- SSL_AEAD,
- SSL_HANDSHAKE_MAC_SHA384,
- },
-
- /* TLS 1.3 suites. */
-
- /* Cipher 1301 */
- {
- TLS1_TXT_AES_128_GCM_SHA256,
- TLS1_CK_AES_128_GCM_SHA256,
- SSL_kGENERIC,
- SSL_aGENERIC,
- SSL_AES128GCM,
- SSL_AEAD,
- SSL_HANDSHAKE_MAC_SHA256,
- },
-
- /* Cipher 1302 */
- {
- TLS1_TXT_AES_256_GCM_SHA384,
- TLS1_CK_AES_256_GCM_SHA384,
- SSL_kGENERIC,
- SSL_aGENERIC,
- SSL_AES256GCM,
- SSL_AEAD,
- SSL_HANDSHAKE_MAC_SHA384,
- },
-
- /* Cipher 1303 */
- {
- TLS1_TXT_CHACHA20_POLY1305_SHA256,
- TLS1_CK_CHACHA20_POLY1305_SHA256,
- SSL_kGENERIC,
- SSL_aGENERIC,
- SSL_CHACHA20POLY1305,
- SSL_AEAD,
- SSL_HANDSHAKE_MAC_SHA256,
- },
-
- /* Cipher C009 */
- {
- TLS1_TXT_ECDHE_ECDSA_WITH_AES_128_CBC_SHA,
- TLS1_CK_ECDHE_ECDSA_WITH_AES_128_CBC_SHA,
- SSL_kECDHE,
- SSL_aECDSA,
- SSL_AES128,
- SSL_SHA1,
- SSL_HANDSHAKE_MAC_DEFAULT,
- },
-
- /* Cipher C00A */
- {
- TLS1_TXT_ECDHE_ECDSA_WITH_AES_256_CBC_SHA,
- TLS1_CK_ECDHE_ECDSA_WITH_AES_256_CBC_SHA,
- SSL_kECDHE,
- SSL_aECDSA,
- SSL_AES256,
- SSL_SHA1,
- SSL_HANDSHAKE_MAC_DEFAULT,
- },
-
- /* Cipher C013 */
- {
- TLS1_TXT_ECDHE_RSA_WITH_AES_128_CBC_SHA,
- TLS1_CK_ECDHE_RSA_WITH_AES_128_CBC_SHA,
- SSL_kECDHE,
- SSL_aRSA,
- SSL_AES128,
- SSL_SHA1,
- SSL_HANDSHAKE_MAC_DEFAULT,
- },
-
- /* Cipher C014 */
- {
- TLS1_TXT_ECDHE_RSA_WITH_AES_256_CBC_SHA,
- TLS1_CK_ECDHE_RSA_WITH_AES_256_CBC_SHA,
- SSL_kECDHE,
- SSL_aRSA,
- SSL_AES256,
- SSL_SHA1,
- SSL_HANDSHAKE_MAC_DEFAULT,
- },
-
-
- /* HMAC based TLS v1.2 ciphersuites from RFC5289 */
-
- /* Cipher C023 */
- {
- TLS1_TXT_ECDHE_ECDSA_WITH_AES_128_SHA256,
- TLS1_CK_ECDHE_ECDSA_WITH_AES_128_SHA256,
- SSL_kECDHE,
- SSL_aECDSA,
- SSL_AES128,
- SSL_SHA256,
- SSL_HANDSHAKE_MAC_SHA256,
- },
-
- /* Cipher C024 */
- {
- TLS1_TXT_ECDHE_ECDSA_WITH_AES_256_SHA384,
- TLS1_CK_ECDHE_ECDSA_WITH_AES_256_SHA384,
- SSL_kECDHE,
- SSL_aECDSA,
- SSL_AES256,
- SSL_SHA384,
- SSL_HANDSHAKE_MAC_SHA384,
- },
-
- /* Cipher C027 */
- {
- TLS1_TXT_ECDHE_RSA_WITH_AES_128_SHA256,
- TLS1_CK_ECDHE_RSA_WITH_AES_128_SHA256,
- SSL_kECDHE,
- SSL_aRSA,
- SSL_AES128,
- SSL_SHA256,
- SSL_HANDSHAKE_MAC_SHA256,
- },
-
- /* Cipher C028 */
- {
- TLS1_TXT_ECDHE_RSA_WITH_AES_256_SHA384,
- TLS1_CK_ECDHE_RSA_WITH_AES_256_SHA384,
- SSL_kECDHE,
- SSL_aRSA,
- SSL_AES256,
- SSL_SHA384,
- SSL_HANDSHAKE_MAC_SHA384,
- },
-
-
- /* GCM based TLS v1.2 ciphersuites from RFC5289 */
-
- /* Cipher C02B */
- {
- TLS1_TXT_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,
- TLS1_CK_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,
- SSL_kECDHE,
- SSL_aECDSA,
- SSL_AES128GCM,
- SSL_AEAD,
- SSL_HANDSHAKE_MAC_SHA256,
- },
-
- /* Cipher C02C */
- {
- TLS1_TXT_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,
- TLS1_CK_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,
- SSL_kECDHE,
- SSL_aECDSA,
- SSL_AES256GCM,
- SSL_AEAD,
- SSL_HANDSHAKE_MAC_SHA384,
- },
-
- /* Cipher C02F */
- {
- TLS1_TXT_ECDHE_RSA_WITH_AES_128_GCM_SHA256,
- TLS1_CK_ECDHE_RSA_WITH_AES_128_GCM_SHA256,
- SSL_kECDHE,
- SSL_aRSA,
- SSL_AES128GCM,
- SSL_AEAD,
- SSL_HANDSHAKE_MAC_SHA256,
- },
-
- /* Cipher C030 */
- {
- TLS1_TXT_ECDHE_RSA_WITH_AES_256_GCM_SHA384,
- TLS1_CK_ECDHE_RSA_WITH_AES_256_GCM_SHA384,
- SSL_kECDHE,
- SSL_aRSA,
- SSL_AES256GCM,
- SSL_AEAD,
- SSL_HANDSHAKE_MAC_SHA384,
- },
-
- /* ECDHE-PSK cipher suites. */
-
- /* Cipher C035 */
- {
- TLS1_TXT_ECDHE_PSK_WITH_AES_128_CBC_SHA,
- TLS1_CK_ECDHE_PSK_WITH_AES_128_CBC_SHA,
- SSL_kECDHE,
- SSL_aPSK,
- SSL_AES128,
- SSL_SHA1,
- SSL_HANDSHAKE_MAC_DEFAULT,
- },
-
- /* Cipher C036 */
- {
- TLS1_TXT_ECDHE_PSK_WITH_AES_256_CBC_SHA,
- TLS1_CK_ECDHE_PSK_WITH_AES_256_CBC_SHA,
- SSL_kECDHE,
- SSL_aPSK,
- SSL_AES256,
- SSL_SHA1,
- SSL_HANDSHAKE_MAC_DEFAULT,
- },
-
- /* ChaCha20-Poly1305 cipher suites. */
-
- #if !defined(BORINGSSL_ANDROID_SYSTEM)
- {
- TLS1_TXT_ECDHE_RSA_WITH_CHACHA20_POLY1305_OLD,
- TLS1_CK_ECDHE_RSA_CHACHA20_POLY1305_OLD,
- SSL_kECDHE,
- SSL_aRSA,
- SSL_CHACHA20POLY1305_OLD,
- SSL_AEAD,
- SSL_HANDSHAKE_MAC_SHA256,
- },
-
- {
- TLS1_TXT_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_OLD,
- TLS1_CK_ECDHE_ECDSA_CHACHA20_POLY1305_OLD,
- SSL_kECDHE,
- SSL_aECDSA,
- SSL_CHACHA20POLY1305_OLD,
- SSL_AEAD,
- SSL_HANDSHAKE_MAC_SHA256,
- },
- #endif
-
- /* Cipher CCA8 */
- {
- TLS1_TXT_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256,
- TLS1_CK_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256,
- SSL_kECDHE,
- SSL_aRSA,
- SSL_CHACHA20POLY1305,
- SSL_AEAD,
- SSL_HANDSHAKE_MAC_SHA256,
- },
-
- /* Cipher CCA9 */
- {
- TLS1_TXT_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256,
- TLS1_CK_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256,
- SSL_kECDHE,
- SSL_aECDSA,
- SSL_CHACHA20POLY1305,
- SSL_AEAD,
- SSL_HANDSHAKE_MAC_SHA256,
- },
-
- /* Cipher CCAB */
- {
- TLS1_TXT_ECDHE_PSK_WITH_CHACHA20_POLY1305_SHA256,
- TLS1_CK_ECDHE_PSK_WITH_CHACHA20_POLY1305_SHA256,
- SSL_kECDHE,
- SSL_aPSK,
- SSL_CHACHA20POLY1305,
- SSL_AEAD,
- SSL_HANDSHAKE_MAC_SHA256,
- },
-
- };
-
- static const size_t kCiphersLen = OPENSSL_ARRAY_SIZE(kCiphers);
-
- #define CIPHER_ADD 1
- #define CIPHER_KILL 2
- #define CIPHER_DEL 3
- #define CIPHER_ORD 4
- #define CIPHER_SPECIAL 5
-
- typedef struct cipher_order_st {
- const SSL_CIPHER *cipher;
- int active;
- int in_group;
- struct cipher_order_st *next, *prev;
- } CIPHER_ORDER;
-
- typedef struct cipher_alias_st {
- /* name is the name of the cipher alias. */
- const char *name;
-
- /* The following fields are bitmasks for the corresponding fields on
- * |SSL_CIPHER|. A cipher matches a cipher alias iff, for each bitmask, the
- * bit corresponding to the cipher's value is set to 1. If any bitmask is
- * all zeroes, the alias matches nothing. Use |~0u| for the default value. */
- uint32_t algorithm_mkey;
- uint32_t algorithm_auth;
- uint32_t algorithm_enc;
- uint32_t algorithm_mac;
-
- /* min_version, if non-zero, matches all ciphers which were added in that
- * particular protocol version. */
- uint16_t min_version;
- } CIPHER_ALIAS;
-
- static const CIPHER_ALIAS kCipherAliases[] = {
- /* "ALL" doesn't include eNULL. It must be explicitly enabled. */
- {"ALL", ~0u, ~0u, ~SSL_eNULL, ~0u, 0},
-
- /* The "COMPLEMENTOFDEFAULT" rule is omitted. It matches nothing. */
-
- /* key exchange aliases
- * (some of those using only a single bit here combine
- * multiple key exchange algs according to the RFCs,
- * e.g. kEDH combines DHE_DSS and DHE_RSA) */
- {"kRSA", SSL_kRSA, ~0u, ~0u, ~0u, 0},
-
- {"kDHE", SSL_kDHE, ~0u, ~0u, ~0u, 0},
- {"kEDH", SSL_kDHE, ~0u, ~0u, ~0u, 0},
- {"DH", SSL_kDHE, ~0u, ~0u, ~0u, 0},
-
- {"kECDHE", SSL_kECDHE, ~0u, ~0u, ~0u, 0},
- {"kEECDH", SSL_kECDHE, ~0u, ~0u, ~0u, 0},
- {"ECDH", SSL_kECDHE, ~0u, ~0u, ~0u, 0},
-
- {"kPSK", SSL_kPSK, ~0u, ~0u, ~0u, 0},
-
- /* server authentication aliases */
- {"aRSA", ~0u, SSL_aRSA, ~SSL_eNULL, ~0u, 0},
- {"aECDSA", ~0u, SSL_aECDSA, ~0u, ~0u, 0},
- {"ECDSA", ~0u, SSL_aECDSA, ~0u, ~0u, 0},
- {"aPSK", ~0u, SSL_aPSK, ~0u, ~0u, 0},
-
- /* aliases combining key exchange and server authentication */
- {"DHE", SSL_kDHE, ~0u, ~0u, ~0u, 0},
- {"EDH", SSL_kDHE, ~0u, ~0u, ~0u, 0},
- {"ECDHE", SSL_kECDHE, ~0u, ~0u, ~0u, 0},
- {"EECDH", SSL_kECDHE, ~0u, ~0u, ~0u, 0},
- {"RSA", SSL_kRSA, SSL_aRSA, ~SSL_eNULL, ~0u, 0},
- {"PSK", SSL_kPSK, SSL_aPSK, ~0u, ~0u, 0},
-
- /* symmetric encryption aliases */
- {"3DES", ~0u, ~0u, SSL_3DES, ~0u, 0},
- {"AES128", ~0u, ~0u, SSL_AES128 | SSL_AES128GCM, ~0u, 0},
- {"AES256", ~0u, ~0u, SSL_AES256 | SSL_AES256GCM, ~0u, 0},
- {"AES", ~0u, ~0u, SSL_AES, ~0u, 0},
- {"AESGCM", ~0u, ~0u, SSL_AES128GCM | SSL_AES256GCM, ~0u, 0},
- {"CHACHA20", ~0u, ~0u, SSL_CHACHA20POLY1305 | SSL_CHACHA20POLY1305_OLD, ~0u,
- 0},
-
- /* MAC aliases */
- {"SHA1", ~0u, ~0u, ~SSL_eNULL, SSL_SHA1, 0},
- {"SHA", ~0u, ~0u, ~SSL_eNULL, SSL_SHA1, 0},
- {"SHA256", ~0u, ~0u, ~0u, SSL_SHA256, 0},
- {"SHA384", ~0u, ~0u, ~0u, SSL_SHA384, 0},
-
- /* Legacy protocol minimum version aliases. "TLSv1" is intentionally the
- * same as "SSLv3". */
- {"SSLv3", ~0u, ~0u, ~SSL_eNULL, ~0u, SSL3_VERSION},
- {"TLSv1", ~0u, ~0u, ~SSL_eNULL, ~0u, SSL3_VERSION},
- {"TLSv1.2", ~0u, ~0u, ~SSL_eNULL, ~0u, TLS1_2_VERSION},
-
- /* Legacy strength classes. */
- {"HIGH", ~0u, ~0u, ~SSL_eNULL, ~0u, 0},
- {"FIPS", ~0u, ~0u, ~SSL_eNULL, ~0u, 0},
- };
-
- static const size_t kCipherAliasesLen = OPENSSL_ARRAY_SIZE(kCipherAliases);
-
- static int ssl_cipher_id_cmp(const void *in_a, const void *in_b) {
- const SSL_CIPHER *a = in_a;
- const SSL_CIPHER *b = in_b;
-
- if (a->id > b->id) {
- return 1;
- } else if (a->id < b->id) {
- return -1;
- } else {
- return 0;
- }
- }
-
- const SSL_CIPHER *SSL_get_cipher_by_value(uint16_t value) {
- SSL_CIPHER c;
-
- c.id = 0x03000000L | value;
- return bsearch(&c, kCiphers, kCiphersLen, sizeof(SSL_CIPHER),
- ssl_cipher_id_cmp);
- }
-
- int ssl_cipher_get_evp_aead(const EVP_AEAD **out_aead,
- size_t *out_mac_secret_len,
- size_t *out_fixed_iv_len,
- const SSL_CIPHER *cipher, uint16_t version) {
- *out_aead = NULL;
- *out_mac_secret_len = 0;
- *out_fixed_iv_len = 0;
-
- if (cipher->algorithm_mac == SSL_AEAD) {
- if (cipher->algorithm_enc == SSL_AES128GCM) {
- *out_aead = EVP_aead_aes_128_gcm();
- *out_fixed_iv_len = 4;
- } else if (cipher->algorithm_enc == SSL_AES256GCM) {
- *out_aead = EVP_aead_aes_256_gcm();
- *out_fixed_iv_len = 4;
- #if !defined(BORINGSSL_ANDROID_SYSTEM)
- } else if (cipher->algorithm_enc == SSL_CHACHA20POLY1305_OLD) {
- *out_aead = EVP_aead_chacha20_poly1305_old();
- *out_fixed_iv_len = 0;
- #endif
- } else if (cipher->algorithm_enc == SSL_CHACHA20POLY1305) {
- *out_aead = EVP_aead_chacha20_poly1305();
- *out_fixed_iv_len = 12;
- } else {
- return 0;
- }
-
- /* In TLS 1.3, the iv_len is equal to the AEAD nonce length whereas the code
- * above computes the TLS 1.2 construction. */
- if (version >= TLS1_3_VERSION) {
- *out_fixed_iv_len = EVP_AEAD_nonce_length(*out_aead);
- }
- } else if (cipher->algorithm_mac == SSL_SHA1) {
- if (cipher->algorithm_enc == SSL_eNULL) {
- if (version == SSL3_VERSION) {
- *out_aead = EVP_aead_null_sha1_ssl3();
- } else {
- *out_aead = EVP_aead_null_sha1_tls();
- }
- } else if (cipher->algorithm_enc == SSL_3DES) {
- if (version == SSL3_VERSION) {
- *out_aead = EVP_aead_des_ede3_cbc_sha1_ssl3();
- *out_fixed_iv_len = 8;
- } else if (version == TLS1_VERSION) {
- *out_aead = EVP_aead_des_ede3_cbc_sha1_tls_implicit_iv();
- *out_fixed_iv_len = 8;
- } else {
- *out_aead = EVP_aead_des_ede3_cbc_sha1_tls();
- }
- } else if (cipher->algorithm_enc == SSL_AES128) {
- if (version == SSL3_VERSION) {
- *out_aead = EVP_aead_aes_128_cbc_sha1_ssl3();
- *out_fixed_iv_len = 16;
- } else if (version == TLS1_VERSION) {
- *out_aead = EVP_aead_aes_128_cbc_sha1_tls_implicit_iv();
- *out_fixed_iv_len = 16;
- } else {
- *out_aead = EVP_aead_aes_128_cbc_sha1_tls();
- }
- } else if (cipher->algorithm_enc == SSL_AES256) {
- if (version == SSL3_VERSION) {
- *out_aead = EVP_aead_aes_256_cbc_sha1_ssl3();
- *out_fixed_iv_len = 16;
- } else if (version == TLS1_VERSION) {
- *out_aead = EVP_aead_aes_256_cbc_sha1_tls_implicit_iv();
- *out_fixed_iv_len = 16;
- } else {
- *out_aead = EVP_aead_aes_256_cbc_sha1_tls();
- }
- } else {
- return 0;
- }
-
- *out_mac_secret_len = SHA_DIGEST_LENGTH;
- } else if (cipher->algorithm_mac == SSL_SHA256) {
- if (cipher->algorithm_enc == SSL_AES128) {
- *out_aead = EVP_aead_aes_128_cbc_sha256_tls();
- } else if (cipher->algorithm_enc == SSL_AES256) {
- *out_aead = EVP_aead_aes_256_cbc_sha256_tls();
- } else {
- return 0;
- }
-
- *out_mac_secret_len = SHA256_DIGEST_LENGTH;
- } else if (cipher->algorithm_mac == SSL_SHA384) {
- if (cipher->algorithm_enc != SSL_AES256) {
- return 0;
- }
-
- *out_aead = EVP_aead_aes_256_cbc_sha384_tls();
- *out_mac_secret_len = SHA384_DIGEST_LENGTH;
- } else {
- return 0;
- }
-
- return 1;
- }
-
- const EVP_MD *ssl_get_handshake_digest(uint32_t algorithm_prf) {
- switch (algorithm_prf) {
- case SSL_HANDSHAKE_MAC_DEFAULT:
- return EVP_sha1();
- case SSL_HANDSHAKE_MAC_SHA256:
- return EVP_sha256();
- case SSL_HANDSHAKE_MAC_SHA384:
- return EVP_sha384();
- default:
- return NULL;
- }
- }
-
- #define ITEM_SEP(a) \
- (((a) == ':') || ((a) == ' ') || ((a) == ';') || ((a) == ','))
-
- /* rule_equals returns one iff the NUL-terminated string |rule| is equal to the
- * |buf_len| bytes at |buf|. */
- static int rule_equals(const char *rule, const char *buf, size_t buf_len) {
- /* |strncmp| alone only checks that |buf| is a prefix of |rule|. */
- return strncmp(rule, buf, buf_len) == 0 && rule[buf_len] == '\0';
- }
-
- 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_PROTOCOL_METHOD *ssl_method,
- CIPHER_ORDER *co_list,
- CIPHER_ORDER **head_p,
- CIPHER_ORDER **tail_p) {
- /* The set of ciphers is static, but some subset may be unsupported by
- * |ssl_method|, so the list may be smaller. */
- size_t co_list_num = 0;
- for (size_t i = 0; i < kCiphersLen; i++) {
- const SSL_CIPHER *cipher = &kCiphers[i];
- if (ssl_method->supports_cipher(cipher) &&
- /* TLS 1.3 ciphers do not participate in this mechanism. */
- cipher->algorithm_mkey != SSL_kGENERIC) {
- co_list[co_list_num].cipher = cipher;
- co_list[co_list_num].next = NULL;
- co_list[co_list_num].prev = NULL;
- co_list[co_list_num].active = 0;
- co_list[co_list_num].in_group = 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 (size_t 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];
- }
- }
-
- /* ssl_cipher_apply_rule applies the rule type |rule| to ciphers matching its
- * parameters in the linked list from |*head_p| to |*tail_p|. It writes the new
- * head and tail of the list to |*head_p| and |*tail_p|, respectively.
- *
- * - If |cipher_id| is non-zero, only that cipher is selected.
- * - Otherwise, if |strength_bits| is non-negative, it selects ciphers
- * of that strength.
- * - Otherwise, it selects ciphers that match each bitmasks in |alg_*| and
- * |min_version|. */
- 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, uint16_t min_version, int rule,
- int strength_bits, int in_group, CIPHER_ORDER **head_p,
- CIPHER_ORDER **tail_p) {
- CIPHER_ORDER *head, *tail, *curr, *next, *last;
- const SSL_CIPHER *cp;
- int reverse = 0;
-
- if (cipher_id == 0 && strength_bits == -1 && min_version == 0 &&
- (alg_mkey == 0 || alg_auth == 0 || alg_enc == 0 || alg_mac == 0)) {
- /* The rule matches nothing, so bail early. */
- return;
- }
-
- if (rule == CIPHER_DEL) {
- /* needed to maintain sorting between currently deleted ciphers */
- reverse = 1;
- }
-
- 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 a specific cipher, the value of
- * |strength_bits|, or the algorithms used. */
- if (cipher_id != 0) {
- if (cipher_id != cp->id) {
- continue;
- }
- } else if (strength_bits >= 0) {
- if (strength_bits != SSL_CIPHER_get_bits(cp, NULL)) {
- continue;
- }
- } else {
- if (!(alg_mkey & cp->algorithm_mkey) ||
- !(alg_auth & cp->algorithm_auth) ||
- !(alg_enc & cp->algorithm_enc) ||
- !(alg_mac & cp->algorithm_mac) ||
- (min_version != 0 && SSL_CIPHER_get_min_version(cp) != min_version)) {
- continue;
- }
- }
-
- /* 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;
- curr->in_group = in_group;
- }
- }
-
- /* Move the added cipher to this location */
- else if (rule == CIPHER_ORD) {
- /* reverse == 0 */
- if (curr->active) {
- ll_append_tail(&head, curr, &tail);
- curr->in_group = 0;
- }
- } 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;
- curr->in_group = 0;
- }
- } 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) {
- int max_strength_bits, 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 &&
- SSL_CIPHER_get_bits(curr->cipher, NULL) > max_strength_bits) {
- max_strength_bits = SSL_CIPHER_get_bits(curr->cipher, NULL);
- }
- curr = curr->next;
- }
-
- number_uses = OPENSSL_malloc((max_strength_bits + 1) * sizeof(int));
- if (!number_uses) {
- OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE);
- return 0;
- }
- OPENSSL_memset(number_uses, 0, (max_strength_bits + 1) * sizeof(int));
-
- /* Now find the strength_bits values actually used. */
- curr = *head_p;
- while (curr != NULL) {
- if (curr->active) {
- number_uses[SSL_CIPHER_get_bits(curr->cipher, NULL)]++;
- }
- 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, CIPHER_ORD, i, 0, head_p, tail_p);
- }
- }
-
- OPENSSL_free(number_uses);
- return 1;
- }
-
- static int ssl_cipher_process_rulestr(const SSL_PROTOCOL_METHOD *ssl_method,
- const char *rule_str,
- CIPHER_ORDER **head_p,
- CIPHER_ORDER **tail_p) {
- uint32_t alg_mkey, alg_auth, alg_enc, alg_mac;
- uint16_t min_version;
- const char *l, *buf;
- int multi, skip_rule, rule, ok, in_group = 0, has_group = 0;
- size_t j, buf_len;
- uint32_t cipher_id;
- char ch;
-
- l = rule_str;
- for (;;) {
- ch = *l;
-
- if (ch == '\0') {
- break; /* done */
- }
-
- if (in_group) {
- if (ch == ']') {
- if (*tail_p) {
- (*tail_p)->in_group = 0;
- }
- in_group = 0;
- l++;
- continue;
- }
-
- if (ch == '|') {
- rule = CIPHER_ADD;
- l++;
- continue;
- } else if (!(ch >= 'a' && ch <= 'z') && !(ch >= 'A' && ch <= 'Z') &&
- !(ch >= '0' && ch <= '9')) {
- OPENSSL_PUT_ERROR(SSL, SSL_R_UNEXPECTED_OPERATOR_IN_GROUP);
- return 0;
- } else {
- rule = CIPHER_ADD;
- }
- } else 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 if (ch == '[') {
- if (in_group) {
- OPENSSL_PUT_ERROR(SSL, SSL_R_NESTED_GROUP);
- return 0;
- }
- in_group = 1;
- has_group = 1;
- l++;
- continue;
- } else {
- rule = CIPHER_ADD;
- }
-
- /* If preference groups are enabled, the only legal operator is +.
- * Otherwise the in_group bits will get mixed up. */
- if (has_group && rule != CIPHER_ADD) {
- OPENSSL_PUT_ERROR(SSL, SSL_R_MIXED_SPECIAL_OPERATOR_WITH_GROUPS);
- return 0;
- }
-
- if (ITEM_SEP(ch)) {
- l++;
- continue;
- }
-
- multi = 0;
- cipher_id = 0;
- alg_mkey = ~0u;
- alg_auth = ~0u;
- alg_enc = ~0u;
- alg_mac = ~0u;
- min_version = 0;
- skip_rule = 0;
-
- for (;;) {
- ch = *l;
- buf = l;
- buf_len = 0;
- while (((ch >= 'A') && (ch <= 'Z')) || ((ch >= '0') && (ch <= '9')) ||
- ((ch >= 'a') && (ch <= 'z')) || (ch == '-') || (ch == '.')) {
- ch = *(++l);
- buf_len++;
- }
-
- if (buf_len == 0) {
- /* We hit something we cannot deal with, it is no command or separator
- * nor alphanumeric, so we call this an error. */
- OPENSSL_PUT_ERROR(SSL, SSL_R_INVALID_COMMAND);
- return 0;
- }
-
- if (rule == CIPHER_SPECIAL) {
- break;
- }
-
- /* Look for a matching exact cipher. These aren't allowed in multipart
- * rules. */
- if (!multi && ch != '+') {
- for (j = 0; j < kCiphersLen; j++) {
- const SSL_CIPHER *cipher = &kCiphers[j];
- if (rule_equals(cipher->name, buf, buf_len)) {
- cipher_id = cipher->id;
- break;
- }
- }
- }
- if (cipher_id == 0) {
- /* If not an exact cipher, look for a matching cipher alias. */
- for (j = 0; j < kCipherAliasesLen; j++) {
- if (rule_equals(kCipherAliases[j].name, buf, buf_len)) {
- alg_mkey &= kCipherAliases[j].algorithm_mkey;
- alg_auth &= kCipherAliases[j].algorithm_auth;
- alg_enc &= kCipherAliases[j].algorithm_enc;
- alg_mac &= kCipherAliases[j].algorithm_mac;
-
- if (min_version != 0 &&
- min_version != kCipherAliases[j].min_version) {
- skip_rule = 1;
- } else {
- min_version = kCipherAliases[j].min_version;
- }
- break;
- }
- }
- if (j == kCipherAliasesLen) {
- skip_rule = 1;
- }
- }
-
- /* Check for a multipart rule. */
- if (ch != '+') {
- break;
- }
- l++;
- multi = 1;
- }
-
- /* If one of the CHACHA20_POLY1305 variants is selected, include the other
- * as well. They have the same name to avoid requiring changes in
- * configuration. Apply this transformation late so that the cipher name
- * still behaves as an exact name and not an alias in multipart rules.
- *
- * This is temporary and will be removed when the pre-standard construction
- * is removed. */
- if (cipher_id == TLS1_CK_ECDHE_RSA_CHACHA20_POLY1305_OLD ||
- cipher_id == TLS1_CK_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256) {
- cipher_id = 0;
- alg_mkey = SSL_kECDHE;
- alg_auth = SSL_aRSA;
- alg_enc = SSL_CHACHA20POLY1305|SSL_CHACHA20POLY1305_OLD;
- alg_mac = SSL_AEAD;
- } else if (cipher_id == TLS1_CK_ECDHE_ECDSA_CHACHA20_POLY1305_OLD ||
- cipher_id == TLS1_CK_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256) {
- cipher_id = 0;
- alg_mkey = SSL_kECDHE;
- alg_auth = SSL_aECDSA;
- alg_enc = SSL_CHACHA20POLY1305|SSL_CHACHA20POLY1305_OLD;
- alg_mac = SSL_AEAD;
- }
-
- /* Ok, we have the rule, now apply it. */
- if (rule == CIPHER_SPECIAL) {
- /* special command */
- ok = 0;
- if (buf_len == 8 && !strncmp(buf, "STRENGTH", 8)) {
- ok = ssl_cipher_strength_sort(head_p, tail_p);
- } else {
- OPENSSL_PUT_ERROR(SSL, SSL_R_INVALID_COMMAND);
- }
-
- if (ok == 0) {
- return 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 (!skip_rule) {
- ssl_cipher_apply_rule(cipher_id, alg_mkey, alg_auth, alg_enc, alg_mac,
- min_version, rule, -1, in_group, head_p, tail_p);
- }
- }
-
- if (in_group) {
- OPENSSL_PUT_ERROR(SSL, SSL_R_INVALID_COMMAND);
- return 0;
- }
-
- return 1;
- }
-
- STACK_OF(SSL_CIPHER) *
- ssl_create_cipher_list(const SSL_PROTOCOL_METHOD *ssl_method,
- struct ssl_cipher_preference_list_st **out_cipher_list,
- const char *rule_str) {
- STACK_OF(SSL_CIPHER) *cipherstack = NULL;
- CIPHER_ORDER *co_list = NULL, *head = NULL, *tail = NULL, *curr;
- uint8_t *in_group_flags = NULL;
- unsigned int num_in_group_flags = 0;
- struct ssl_cipher_preference_list_st *pref_list = NULL;
-
- /* Return with error if nothing to do. */
- if (rule_str == NULL || out_cipher_list == NULL) {
- return NULL;
- }
-
- /* 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. */
- co_list = OPENSSL_malloc(sizeof(CIPHER_ORDER) * kCiphersLen);
- if (co_list == NULL) {
- OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE);
- return NULL;
- }
-
- ssl_cipher_collect_ciphers(ssl_method, co_list, &head, &tail);
-
- /* Now arrange all ciphers by preference:
- * TODO(davidben): Compute this order once and copy it. */
-
- /* Everything else being equal, prefer ECDHE_ECDSA and ECDHE_RSA over other
- * key exchange mechanisms */
- ssl_cipher_apply_rule(0, SSL_kECDHE, SSL_aECDSA, ~0u, ~0u, 0, CIPHER_ADD, -1,
- 0, &head, &tail);
- ssl_cipher_apply_rule(0, SSL_kECDHE, ~0u, ~0u, ~0u, 0, CIPHER_ADD, -1, 0,
- &head, &tail);
- ssl_cipher_apply_rule(0, ~0u, ~0u, ~0u, ~0u, 0, CIPHER_DEL, -1, 0, &head,
- &tail);
-
- /* Order the bulk ciphers. First the preferred AEAD ciphers. We prefer
- * CHACHA20 unless there is hardware support for fast and constant-time
- * AES_GCM. Of the two CHACHA20 variants, the new one is preferred over the
- * old one. */
- if (EVP_has_aes_hardware()) {
- ssl_cipher_apply_rule(0, ~0u, ~0u, SSL_AES128GCM, ~0u, 0, CIPHER_ADD, -1, 0,
- &head, &tail);
- ssl_cipher_apply_rule(0, ~0u, ~0u, SSL_AES256GCM, ~0u, 0, CIPHER_ADD, -1, 0,
- &head, &tail);
- ssl_cipher_apply_rule(0, ~0u, ~0u, SSL_CHACHA20POLY1305, ~0u, 0, CIPHER_ADD,
- -1, 0, &head, &tail);
- ssl_cipher_apply_rule(0, ~0u, ~0u, SSL_CHACHA20POLY1305_OLD, ~0u, 0,
- CIPHER_ADD, -1, 0, &head, &tail);
- } else {
- ssl_cipher_apply_rule(0, ~0u, ~0u, SSL_CHACHA20POLY1305, ~0u, 0, CIPHER_ADD,
- -1, 0, &head, &tail);
- ssl_cipher_apply_rule(0, ~0u, ~0u, SSL_CHACHA20POLY1305_OLD, ~0u, 0,
- CIPHER_ADD, -1, 0, &head, &tail);
- ssl_cipher_apply_rule(0, ~0u, ~0u, SSL_AES128GCM, ~0u, 0, CIPHER_ADD, -1, 0,
- &head, &tail);
- ssl_cipher_apply_rule(0, ~0u, ~0u, SSL_AES256GCM, ~0u, 0, CIPHER_ADD, -1, 0,
- &head, &tail);
- }
-
- /* Then the legacy non-AEAD ciphers: AES_128_CBC, AES_256_CBC,
- * 3DES_EDE_CBC_SHA. */
- ssl_cipher_apply_rule(0, ~0u, ~0u, SSL_AES128, ~0u, 0, CIPHER_ADD, -1, 0,
- &head, &tail);
- ssl_cipher_apply_rule(0, ~0u, ~0u, SSL_AES256, ~0u, 0, CIPHER_ADD, -1, 0,
- &head, &tail);
- ssl_cipher_apply_rule(0, ~0u, ~0u, SSL_3DES, ~0u, 0, CIPHER_ADD, -1, 0, &head,
- &tail);
-
- /* Temporarily enable everything else for sorting */
- ssl_cipher_apply_rule(0, ~0u, ~0u, ~0u, ~0u, 0, CIPHER_ADD, -1, 0, &head,
- &tail);
-
- /* Move ciphers without forward secrecy to the end. */
- ssl_cipher_apply_rule(0, (SSL_kRSA | SSL_kPSK), ~0u, ~0u, ~0u, 0,
- CIPHER_ORD, -1, 0, &head, &tail);
-
- /* Now disable everything (maintaining the ordering!) */
- ssl_cipher_apply_rule(0, ~0u, ~0u, ~0u, ~0u, 0, CIPHER_DEL, -1, 0, &head,
- &tail);
-
- /* If the rule_string begins with DEFAULT, apply the default rule before
- * using the (possibly available) additional rules. */
- const char *rule_p = rule_str;
- if (strncmp(rule_str, "DEFAULT", 7) == 0) {
- if (!ssl_cipher_process_rulestr(ssl_method, SSL_DEFAULT_CIPHER_LIST, &head,
- &tail)) {
- goto err;
- }
- rule_p += 7;
- if (*rule_p == ':') {
- rule_p++;
- }
- }
-
- if (*rule_p != '\0' &&
- !ssl_cipher_process_rulestr(ssl_method, rule_p, &head, &tail)) {
- goto err;
- }
-
- /* Allocate new "cipherstack" for the result, return with error
- * if we cannot get one. */
- cipherstack = sk_SSL_CIPHER_new_null();
- if (cipherstack == NULL) {
- goto err;
- }
-
- in_group_flags = OPENSSL_malloc(kCiphersLen);
- if (!in_group_flags) {
- goto err;
- }
-
- /* 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)) {
- goto err;
- }
- in_group_flags[num_in_group_flags++] = curr->in_group;
- }
- }
- OPENSSL_free(co_list); /* Not needed any longer */
- co_list = NULL;
-
- pref_list = OPENSSL_malloc(sizeof(struct ssl_cipher_preference_list_st));
- if (!pref_list) {
- goto err;
- }
- pref_list->ciphers = cipherstack;
- pref_list->in_group_flags = OPENSSL_malloc(num_in_group_flags);
- if (!pref_list->in_group_flags) {
- goto err;
- }
- OPENSSL_memcpy(pref_list->in_group_flags, in_group_flags, num_in_group_flags);
- OPENSSL_free(in_group_flags);
- in_group_flags = NULL;
- if (*out_cipher_list != NULL) {
- ssl_cipher_preference_list_free(*out_cipher_list);
- }
- *out_cipher_list = pref_list;
- pref_list = NULL;
-
- return cipherstack;
-
- err:
- OPENSSL_free(co_list);
- OPENSSL_free(in_group_flags);
- sk_SSL_CIPHER_free(cipherstack);
- if (pref_list) {
- OPENSSL_free(pref_list->in_group_flags);
- }
- OPENSSL_free(pref_list);
- return NULL;
- }
-
- uint32_t SSL_CIPHER_get_id(const SSL_CIPHER *cipher) { return cipher->id; }
-
- uint16_t ssl_cipher_get_value(const SSL_CIPHER *cipher) {
- uint32_t id = cipher->id;
- /* All ciphers are SSLv3. */
- assert((id & 0xff000000) == 0x03000000);
- return id & 0xffff;
- }
-
- int SSL_CIPHER_is_AES(const SSL_CIPHER *cipher) {
- return (cipher->algorithm_enc & SSL_AES) != 0;
- }
-
- int SSL_CIPHER_has_MD5_HMAC(const SSL_CIPHER *cipher) {
- return 0;
- }
-
- int SSL_CIPHER_has_SHA1_HMAC(const SSL_CIPHER *cipher) {
- return (cipher->algorithm_mac & SSL_SHA1) != 0;
- }
-
- int SSL_CIPHER_has_SHA256_HMAC(const SSL_CIPHER *cipher) {
- return (cipher->algorithm_mac & SSL_SHA256) != 0;
- }
-
- int SSL_CIPHER_is_AESGCM(const SSL_CIPHER *cipher) {
- return (cipher->algorithm_enc & (SSL_AES128GCM | SSL_AES256GCM)) != 0;
- }
-
- int SSL_CIPHER_is_AES128GCM(const SSL_CIPHER *cipher) {
- return (cipher->algorithm_enc & SSL_AES128GCM) != 0;
- }
-
- int SSL_CIPHER_is_AES128CBC(const SSL_CIPHER *cipher) {
- return (cipher->algorithm_enc & SSL_AES128) != 0;
- }
-
- int SSL_CIPHER_is_AES256CBC(const SSL_CIPHER *cipher) {
- return (cipher->algorithm_enc & SSL_AES256) != 0;
- }
-
- int SSL_CIPHER_is_CHACHA20POLY1305(const SSL_CIPHER *cipher) {
- return (cipher->algorithm_enc &
- (SSL_CHACHA20POLY1305 | SSL_CHACHA20POLY1305_OLD)) != 0;
- }
-
- int SSL_CIPHER_is_NULL(const SSL_CIPHER *cipher) {
- return (cipher->algorithm_enc & SSL_eNULL) != 0;
- }
-
- int SSL_CIPHER_is_block_cipher(const SSL_CIPHER *cipher) {
- return (cipher->algorithm_enc & SSL_eNULL) == 0 &&
- cipher->algorithm_mac != SSL_AEAD;
- }
-
- int SSL_CIPHER_is_ECDSA(const SSL_CIPHER *cipher) {
- return (cipher->algorithm_auth & SSL_aECDSA) != 0;
- }
-
- int SSL_CIPHER_is_DHE(const SSL_CIPHER *cipher) {
- return (cipher->algorithm_mkey & SSL_kDHE) != 0;
- }
-
- int SSL_CIPHER_is_ECDHE(const SSL_CIPHER *cipher) {
- return (cipher->algorithm_mkey & SSL_kECDHE) != 0;
- }
-
- uint16_t SSL_CIPHER_get_min_version(const SSL_CIPHER *cipher) {
- if (cipher->algorithm_mkey == SSL_kGENERIC ||
- cipher->algorithm_auth == SSL_aGENERIC) {
- return TLS1_3_VERSION;
- }
-
- if (cipher->algorithm_prf != SSL_HANDSHAKE_MAC_DEFAULT) {
- /* Cipher suites before TLS 1.2 use the default PRF, while all those added
- * afterwards specify a particular hash. */
- return TLS1_2_VERSION;
- }
- return SSL3_VERSION;
- }
-
- uint16_t SSL_CIPHER_get_max_version(const SSL_CIPHER *cipher) {
- if (cipher->algorithm_mkey == SSL_kGENERIC ||
- cipher->algorithm_auth == SSL_aGENERIC) {
- return TLS1_3_VERSION;
- }
- return TLS1_2_VERSION;
- }
-
- /* return the actual cipher being used */
- const char *SSL_CIPHER_get_name(const SSL_CIPHER *cipher) {
- if (cipher != NULL) {
- return cipher->name;
- }
-
- return "(NONE)";
- }
-
- const char *SSL_CIPHER_get_kx_name(const SSL_CIPHER *cipher) {
- if (cipher == NULL) {
- return "";
- }
-
- switch (cipher->algorithm_mkey) {
- case SSL_kRSA:
- return "RSA";
-
- case SSL_kDHE:
- switch (cipher->algorithm_auth) {
- case SSL_aRSA:
- return "DHE_RSA";
- default:
- assert(0);
- return "UNKNOWN";
- }
-
- case SSL_kECDHE:
- switch (cipher->algorithm_auth) {
- case SSL_aECDSA:
- return "ECDHE_ECDSA";
- case SSL_aRSA:
- return "ECDHE_RSA";
- case SSL_aPSK:
- return "ECDHE_PSK";
- default:
- assert(0);
- return "UNKNOWN";
- }
-
- case SSL_kPSK:
- assert(cipher->algorithm_auth == SSL_aPSK);
- return "PSK";
-
- case SSL_kGENERIC:
- assert(cipher->algorithm_auth == SSL_aGENERIC);
- return "GENERIC";
-
- default:
- assert(0);
- return "UNKNOWN";
- }
- }
-
- static const char *ssl_cipher_get_enc_name(const SSL_CIPHER *cipher) {
- switch (cipher->algorithm_enc) {
- case SSL_3DES:
- return "3DES_EDE_CBC";
- case SSL_AES128:
- return "AES_128_CBC";
- case SSL_AES256:
- return "AES_256_CBC";
- case SSL_AES128GCM:
- return "AES_128_GCM";
- case SSL_AES256GCM:
- return "AES_256_GCM";
- case SSL_CHACHA20POLY1305:
- case SSL_CHACHA20POLY1305_OLD:
- return "CHACHA20_POLY1305";
- break;
- default:
- assert(0);
- return "UNKNOWN";
- }
- }
-
- static const char *ssl_cipher_get_prf_name(const SSL_CIPHER *cipher) {
- switch (cipher->algorithm_prf) {
- case SSL_HANDSHAKE_MAC_DEFAULT:
- /* Before TLS 1.2, the PRF component is the hash used in the HMAC, which
- * is SHA-1 for all supported ciphers. */
- assert(cipher->algorithm_mac == SSL_SHA1);
- return "SHA";
- case SSL_HANDSHAKE_MAC_SHA256:
- return "SHA256";
- case SSL_HANDSHAKE_MAC_SHA384:
- return "SHA384";
- }
- assert(0);
- return "UNKNOWN";
- }
-
- char *SSL_CIPHER_get_rfc_name(const SSL_CIPHER *cipher) {
- if (cipher == NULL) {
- return NULL;
- }
-
- const char *kx_name = SSL_CIPHER_get_kx_name(cipher);
- const char *enc_name = ssl_cipher_get_enc_name(cipher);
- const char *prf_name = ssl_cipher_get_prf_name(cipher);
-
- /* The final name is TLS_{kx_name}_WITH_{enc_name}_{prf_name} or
- * TLS_{enc_name}_{prf_name} depending on whether the cipher is AEAD-only. */
- size_t len = 4 + strlen(enc_name) + 1 + strlen(prf_name) + 1;
-
- if (cipher->algorithm_mkey != SSL_kGENERIC) {
- len += strlen(kx_name) + 6;
- }
-
- char *ret = OPENSSL_malloc(len);
- if (ret == NULL) {
- return NULL;
- }
-
- if (BUF_strlcpy(ret, "TLS_", len) >= len ||
- (cipher->algorithm_mkey != SSL_kGENERIC &&
- (BUF_strlcat(ret, kx_name, len) >= len ||
- BUF_strlcat(ret, "_WITH_", len) >= len)) ||
- BUF_strlcat(ret, enc_name, len) >= len ||
- BUF_strlcat(ret, "_", len) >= len ||
- BUF_strlcat(ret, prf_name, len) >= len) {
- assert(0);
- OPENSSL_free(ret);
- return NULL;
- }
-
- assert(strlen(ret) + 1 == len);
- return ret;
- }
-
- int SSL_CIPHER_get_bits(const SSL_CIPHER *cipher, int *out_alg_bits) {
- if (cipher == NULL) {
- return 0;
- }
-
- int alg_bits, strength_bits;
- switch (cipher->algorithm_enc) {
- case SSL_AES128:
- case SSL_AES128GCM:
- alg_bits = 128;
- strength_bits = 128;
- break;
-
- case SSL_AES256:
- case SSL_AES256GCM:
- #if !defined(BORINGSSL_ANDROID_SYSTEM)
- case SSL_CHACHA20POLY1305_OLD:
- #endif
- case SSL_CHACHA20POLY1305:
- alg_bits = 256;
- strength_bits = 256;
- break;
-
- case SSL_3DES:
- alg_bits = 168;
- strength_bits = 112;
- break;
-
- case SSL_eNULL:
- alg_bits = 0;
- strength_bits = 0;
- break;
-
- default:
- assert(0);
- alg_bits = 0;
- strength_bits = 0;
- }
-
- if (out_alg_bits != NULL) {
- *out_alg_bits = alg_bits;
- }
- return strength_bits;
- }
-
- const char *SSL_CIPHER_description(const SSL_CIPHER *cipher, char *buf,
- int len) {
- const char *kx, *au, *enc, *mac;
- uint32_t alg_mkey, alg_auth, alg_enc, alg_mac;
-
- alg_mkey = cipher->algorithm_mkey;
- alg_auth = cipher->algorithm_auth;
- alg_enc = cipher->algorithm_enc;
- alg_mac = cipher->algorithm_mac;
-
- 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_kGENERIC:
- kx = "GENERIC";
- break;
-
- default:
- kx = "unknown";
- }
-
- switch (alg_auth) {
- case SSL_aRSA:
- au = "RSA";
- break;
-
- case SSL_aECDSA:
- au = "ECDSA";
- break;
-
- case SSL_aPSK:
- au = "PSK";
- break;
-
- case SSL_aGENERIC:
- au = "GENERIC";
- break;
-
- default:
- au = "unknown";
- break;
- }
-
- switch (alg_enc) {
- case SSL_3DES:
- enc = "3DES(168)";
- 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_CHACHA20POLY1305_OLD:
- enc = "ChaCha20-Poly1305-Old";
- break;
-
- case SSL_CHACHA20POLY1305:
- enc = "ChaCha20-Poly1305";
- break;
-
- case SSL_eNULL:
- enc="None";
- break;
-
- default:
- enc = "unknown";
- break;
- }
-
- switch (alg_mac) {
- case SSL_SHA1:
- mac = "SHA1";
- break;
-
- case SSL_SHA256:
- mac = "SHA256";
- break;
-
- case SSL_SHA384:
- mac = "SHA384";
- break;
-
- case SSL_AEAD:
- mac = "AEAD";
- break;
-
- default:
- mac = "unknown";
- break;
- }
-
- if (buf == NULL) {
- len = 128;
- buf = OPENSSL_malloc(len);
- if (buf == NULL) {
- return NULL;
- }
- } else if (len < 128) {
- return "Buffer too small";
- }
-
- BIO_snprintf(buf, len, "%-23s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s\n",
- cipher->name, kx, au, enc, mac);
- return buf;
- }
-
- const char *SSL_CIPHER_get_version(const SSL_CIPHER *cipher) {
- return "TLSv1/SSLv3";
- }
-
- COMP_METHOD *SSL_COMP_get_compression_methods(void) { return NULL; }
-
- int SSL_COMP_add_compression_method(int id, COMP_METHOD *cm) { return 1; }
-
- const char *SSL_COMP_get_name(const COMP_METHOD *comp) { return NULL; }
-
- void SSL_COMP_free_compression_methods(void) {}
-
- int ssl_cipher_get_key_type(const SSL_CIPHER *cipher) {
- uint32_t alg_a = cipher->algorithm_auth;
-
- if (alg_a & SSL_aECDSA) {
- return EVP_PKEY_EC;
- } else if (alg_a & SSL_aRSA) {
- return EVP_PKEY_RSA;
- }
-
- return EVP_PKEY_NONE;
- }
-
- int ssl_cipher_uses_certificate_auth(const SSL_CIPHER *cipher) {
- return (cipher->algorithm_auth & SSL_aCERT) != 0;
- }
-
- int ssl_cipher_requires_server_key_exchange(const SSL_CIPHER *cipher) {
- /* Ephemeral Diffie-Hellman key exchanges require a ServerKeyExchange. */
- if (cipher->algorithm_mkey & SSL_kDHE ||
- cipher->algorithm_mkey & SSL_kECDHE) {
- return 1;
- }
-
- /* It is optional in all others. */
- return 0;
- }
-
- size_t ssl_cipher_get_record_split_len(const SSL_CIPHER *cipher) {
- size_t block_size;
- switch (cipher->algorithm_enc) {
- case SSL_3DES:
- block_size = 8;
- break;
- case SSL_AES128:
- case SSL_AES256:
- block_size = 16;
- break;
- default:
- return 0;
- }
-
- /* All supported TLS 1.0 ciphers use SHA-1. */
- assert(cipher->algorithm_mac == SSL_SHA1);
- size_t ret = 1 + SHA_DIGEST_LENGTH;
- ret += block_size - (ret % block_size);
- return ret;
- }
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