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ssl_ciph.c
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ssl_ciph.c
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/* ssl/ssl_ciph.c */
/* Copyright (C) 1995-1998 Eric Young ([email protected])
* All rights reserved.
*
* This package is an SSL implementation written
* by Eric Young ([email protected]).
* 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 ([email protected]).
*
* 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 ([email protected])"
* 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 ([email protected])"
*
* 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
*
* 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
* ([email protected]). This product includes software written by Tim
* Hudson ([email protected]).
*
*/
/* ====================================================================
* 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 <stdio.h>
#include <openssl/objects.h>
#ifndef OPENSSL_NO_COMP
# include <openssl/comp.h>
#endif
#ifndef OPENSSL_NO_ENGINE
# include <openssl/engine.h>
#endif
#include "ssl_locl.h"
#define SSL_ENC_DES_IDX 0
#define SSL_ENC_3DES_IDX 1
#define SSL_ENC_RC4_IDX 2
#define SSL_ENC_RC2_IDX 3
#define SSL_ENC_IDEA_IDX 4
#define SSL_ENC_NULL_IDX 5
#define SSL_ENC_AES128_IDX 6
#define SSL_ENC_AES256_IDX 7
#define SSL_ENC_CAMELLIA128_IDX 8
#define SSL_ENC_CAMELLIA256_IDX 9
#define SSL_ENC_GOST89_IDX 10
#define SSL_ENC_SEED_IDX 11
#define SSL_ENC_AES128GCM_IDX 12
#define SSL_ENC_AES256GCM_IDX 13
#define SSL_ENC_AES128CCM_IDX 14
#define SSL_ENC_AES256CCM_IDX 15
#define SSL_ENC_AES128CCM8_IDX 16
#define SSL_ENC_AES256CCM8_IDX 17
#define SSL_ENC_NUM_IDX 18
/* NB: make sure indices in these tables match values above */
typedef struct {
unsigned long mask;
int nid;
} ssl_cipher_table;
/* Table of NIDs for each cipher */
static const ssl_cipher_table ssl_cipher_table_cipher[SSL_ENC_NUM_IDX] = {
{SSL_DES, NID_des_cbc}, /* SSL_ENC_DES_IDX 0 */
{SSL_3DES, NID_des_ede3_cbc}, /* SSL_ENC_3DES_IDX 1 */
{SSL_RC4, NID_rc4}, /* SSL_ENC_RC4_IDX 2 */
{SSL_RC2, NID_rc2_cbc}, /* SSL_ENC_RC2_IDX 3 */
{SSL_IDEA, NID_idea_cbc}, /* SSL_ENC_IDEA_IDX 4 */
{SSL_eNULL, NID_undef}, /* SSL_ENC_NULL_IDX 5 */
{SSL_AES128, NID_aes_128_cbc}, /* SSL_ENC_AES128_IDX 6 */
{SSL_AES256, NID_aes_256_cbc}, /* SSL_ENC_AES256_IDX 7 */
{SSL_CAMELLIA128, NID_camellia_128_cbc}, /* SSL_ENC_CAMELLIA128_IDX 8 */
{SSL_CAMELLIA256, NID_camellia_256_cbc}, /* SSL_ENC_CAMELLIA256_IDX 9 */
{SSL_eGOST2814789CNT, NID_gost89_cnt}, /* SSL_ENC_GOST89_IDX 10 */
{SSL_SEED, NID_seed_cbc}, /* SSL_ENC_SEED_IDX 11 */
{SSL_AES128GCM, NID_aes_128_gcm}, /* SSL_ENC_AES128GCM_IDX 12 */
{SSL_AES256GCM, NID_aes_256_gcm}, /* SSL_ENC_AES256GCM_IDX 13 */
{SSL_AES128CCM, NID_aes_128_ccm}, /* SSL_ENC_AES128CCM_IDX 14 */
{SSL_AES256CCM, NID_aes_256_ccm}, /* SSL_ENC_AES256CCM_IDX 15 */
{SSL_AES128CCM8, NID_aes_128_ccm}, /* SSL_ENC_AES128CCM8_IDX 16 */
{SSL_AES256CCM8, NID_aes_256_ccm} /* SSL_ENC_AES256CCM8_IDX 17 */
};
static const EVP_CIPHER *ssl_cipher_methods[SSL_ENC_NUM_IDX] = {
NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
NULL, NULL
};
#define SSL_COMP_NULL_IDX 0
#define SSL_COMP_ZLIB_IDX 1
#define SSL_COMP_NUM_IDX 2
static STACK_OF(SSL_COMP) *ssl_comp_methods = NULL;
#define SSL_MD_MD5_IDX 0
#define SSL_MD_SHA1_IDX 1
#define SSL_MD_GOST94_IDX 2
#define SSL_MD_GOST89MAC_IDX 3
#define SSL_MD_SHA256_IDX 4
#define SSL_MD_SHA384_IDX 5
/*
* Constant SSL_MAX_DIGEST equal to size of digests array should be defined
* in the ssl_locl.h
*/
#define SSL_MD_NUM_IDX SSL_MAX_DIGEST
/* NB: make sure indices in this table matches values above */
static const ssl_cipher_table ssl_cipher_table_mac[SSL_MD_NUM_IDX] = {
{SSL_MD5, NID_md5}, /* SSL_MD_MD5_IDX 0 */
{SSL_SHA1, NID_sha1}, /* SSL_MD_SHA1_IDX 1 */
{SSL_GOST94, NID_id_GostR3411_94}, /* SSL_MD_GOST94_IDX 2 */
{SSL_GOST89MAC, NID_id_Gost28147_89_MAC}, /* SSL_MD_GOST89MAC_IDX 3 */
{SSL_SHA256, NID_sha256}, /* SSL_MD_SHA256_IDX 4 */
{SSL_SHA384, NID_sha384} /* SSL_MD_SHA384_IDX 5 */
};
static const EVP_MD *ssl_digest_methods[SSL_MD_NUM_IDX] = {
NULL, NULL, NULL, NULL, NULL, NULL
};
/* Utility function for table lookup */
static int ssl_cipher_info_find(const ssl_cipher_table * table,
size_t table_cnt, unsigned long mask)
{
size_t i;
for (i = 0; i < table_cnt; i++, table++) {
if (table->mask == mask)
return i;
}
return -1;
}
#define ssl_cipher_info_lookup(table, x) \
ssl_cipher_info_find(table, OSSL_NELEM(table), x)
/*
* PKEY_TYPE for GOST89MAC is known in advance, but, because implementation
* is engine-provided, we'll fill it only if corresponding EVP_PKEY_METHOD is
* found
*/
static int ssl_mac_pkey_id[SSL_MD_NUM_IDX] = {
EVP_PKEY_HMAC, EVP_PKEY_HMAC, EVP_PKEY_HMAC, NID_undef,
EVP_PKEY_HMAC, EVP_PKEY_HMAC
};
static int ssl_mac_secret_size[SSL_MD_NUM_IDX] = {
0, 0, 0, 0, 0, 0
};
static const int ssl_handshake_digest_flag[SSL_MD_NUM_IDX] = {
SSL_HANDSHAKE_MAC_MD5, SSL_HANDSHAKE_MAC_SHA,
SSL_HANDSHAKE_MAC_GOST94, 0, SSL_HANDSHAKE_MAC_SHA256,
SSL_HANDSHAKE_MAC_SHA384
};
#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 dead;
struct cipher_order_st *next, *prev;
} CIPHER_ORDER;
static const SSL_CIPHER cipher_aliases[] = {
/* "ALL" doesn't include eNULL (must be specifically enabled) */
{0, SSL_TXT_ALL, 0, 0, 0, ~SSL_eNULL, 0, 0, 0, 0, 0, 0},
/* "COMPLEMENTOFALL" */
{0, SSL_TXT_CMPALL, 0, 0, 0, SSL_eNULL, 0, 0, 0, 0, 0, 0},
/*
* "COMPLEMENTOFDEFAULT" (does *not* include ciphersuites not found in
* ALL!)
*/
{0, SSL_TXT_CMPDEF, 0, SSL_kDHE | SSL_kECDHE, SSL_aNULL, ~SSL_eNULL, 0, 0,
0, 0, 0, 0},
/*
* key exchange aliases (some of those using only a single bit here
* combine multiple key exchange algs according to the RFCs, e.g. kDHE
* combines DHE_DSS and DHE_RSA)
*/
{0, SSL_TXT_kRSA, 0, SSL_kRSA, 0, 0, 0, 0, 0, 0, 0, 0},
{0, SSL_TXT_kDHr, 0, SSL_kDHr, 0, 0, 0, 0, 0, 0, 0, 0},
{0, SSL_TXT_kDHd, 0, SSL_kDHd, 0, 0, 0, 0, 0, 0, 0, 0},
{0, SSL_TXT_kDH, 0, SSL_kDHr | SSL_kDHd, 0, 0, 0, 0, 0, 0, 0, 0},
{0, SSL_TXT_kEDH, 0, SSL_kDHE, 0, 0, 0, 0, 0, 0, 0, 0},
{0, SSL_TXT_kDHE, 0, SSL_kDHE, 0, 0, 0, 0, 0, 0, 0, 0},
{0, SSL_TXT_DH, 0, SSL_kDHr | SSL_kDHd | SSL_kDHE, 0, 0, 0, 0, 0, 0, 0,
0},
{0, SSL_TXT_kECDHr, 0, SSL_kECDHr, 0, 0, 0, 0, 0, 0, 0, 0},
{0, SSL_TXT_kECDHe, 0, SSL_kECDHe, 0, 0, 0, 0, 0, 0, 0, 0},
{0, SSL_TXT_kECDH, 0, SSL_kECDHr | SSL_kECDHe, 0, 0, 0, 0, 0, 0, 0, 0},
{0, SSL_TXT_kEECDH, 0, SSL_kECDHE, 0, 0, 0, 0, 0, 0, 0, 0},
{0, SSL_TXT_kECDHE, 0, SSL_kECDHE, 0, 0, 0, 0, 0, 0, 0, 0},
{0, SSL_TXT_ECDH, 0, SSL_kECDHr | SSL_kECDHe | SSL_kECDHE, 0, 0, 0, 0, 0,
0, 0, 0},
{0, SSL_TXT_kPSK, 0, SSL_kPSK, 0, 0, 0, 0, 0, 0, 0, 0},
{0, SSL_TXT_kRSAPSK, 0, SSL_kRSAPSK, 0, 0, 0, 0, 0, 0, 0, 0},
{0, SSL_TXT_kECDHEPSK, 0, SSL_kECDHEPSK, 0, 0, 0, 0, 0, 0, 0, 0},
{0, SSL_TXT_kDHEPSK, 0, SSL_kDHEPSK, 0, 0, 0, 0, 0, 0, 0, 0},
{0, SSL_TXT_kSRP, 0, SSL_kSRP, 0, 0, 0, 0, 0, 0, 0, 0},
{0, SSL_TXT_kGOST, 0, SSL_kGOST, 0, 0, 0, 0, 0, 0, 0, 0},
/* server authentication aliases */
{0, SSL_TXT_aRSA, 0, 0, SSL_aRSA, 0, 0, 0, 0, 0, 0, 0},
{0, SSL_TXT_aDSS, 0, 0, SSL_aDSS, 0, 0, 0, 0, 0, 0, 0},
{0, SSL_TXT_DSS, 0, 0, SSL_aDSS, 0, 0, 0, 0, 0, 0, 0},
{0, SSL_TXT_aNULL, 0, 0, SSL_aNULL, 0, 0, 0, 0, 0, 0, 0},
/* no such ciphersuites supported! */
{0, SSL_TXT_aDH, 0, 0, SSL_aDH, 0, 0, 0, 0, 0, 0, 0},
{0, SSL_TXT_aECDH, 0, 0, SSL_aECDH, 0, 0, 0, 0, 0, 0, 0},
{0, SSL_TXT_aECDSA, 0, 0, SSL_aECDSA, 0, 0, 0, 0, 0, 0, 0},
{0, SSL_TXT_ECDSA, 0, 0, SSL_aECDSA, 0, 0, 0, 0, 0, 0, 0},
{0, SSL_TXT_aPSK, 0, 0, SSL_aPSK, 0, 0, 0, 0, 0, 0, 0},
{0, SSL_TXT_aGOST01, 0, 0, SSL_aGOST01, 0, 0, 0, 0, 0, 0, 0},
{0, SSL_TXT_aGOST, 0, 0, SSL_aGOST01, 0, 0, 0, 0, 0, 0, 0},
{0, SSL_TXT_aSRP, 0, 0, SSL_aSRP, 0, 0, 0, 0, 0, 0, 0},
/* aliases combining key exchange and server authentication */
{0, SSL_TXT_EDH, 0, SSL_kDHE, ~SSL_aNULL, 0, 0, 0, 0, 0, 0, 0},
{0, SSL_TXT_DHE, 0, SSL_kDHE, ~SSL_aNULL, 0, 0, 0, 0, 0, 0, 0},
{0, SSL_TXT_EECDH, 0, SSL_kECDHE, ~SSL_aNULL, 0, 0, 0, 0, 0, 0, 0},
{0, SSL_TXT_ECDHE, 0, SSL_kECDHE, ~SSL_aNULL, 0, 0, 0, 0, 0, 0, 0},
{0, SSL_TXT_NULL, 0, 0, 0, SSL_eNULL, 0, 0, 0, 0, 0, 0},
{0, SSL_TXT_RSA, 0, SSL_kRSA, SSL_aRSA, 0, 0, 0, 0, 0, 0, 0},
{0, SSL_TXT_ADH, 0, SSL_kDHE, SSL_aNULL, 0, 0, 0, 0, 0, 0, 0},
{0, SSL_TXT_AECDH, 0, SSL_kECDHE, SSL_aNULL, 0, 0, 0, 0, 0, 0, 0},
{0, SSL_TXT_PSK, 0, SSL_PSK, 0, 0, 0, 0, 0, 0, 0, 0},
{0, SSL_TXT_SRP, 0, SSL_kSRP, 0, 0, 0, 0, 0, 0, 0, 0},
/* symmetric encryption aliases */
{0, SSL_TXT_DES, 0, 0, 0, SSL_DES, 0, 0, 0, 0, 0, 0},
{0, SSL_TXT_3DES, 0, 0, 0, SSL_3DES, 0, 0, 0, 0, 0, 0},
{0, SSL_TXT_RC4, 0, 0, 0, SSL_RC4, 0, 0, 0, 0, 0, 0},
{0, SSL_TXT_RC2, 0, 0, 0, SSL_RC2, 0, 0, 0, 0, 0, 0},
{0, SSL_TXT_IDEA, 0, 0, 0, SSL_IDEA, 0, 0, 0, 0, 0, 0},
{0, SSL_TXT_SEED, 0, 0, 0, SSL_SEED, 0, 0, 0, 0, 0, 0},
{0, SSL_TXT_eNULL, 0, 0, 0, SSL_eNULL, 0, 0, 0, 0, 0, 0},
{0, SSL_TXT_AES128, 0, 0, 0, SSL_AES128 | SSL_AES128GCM | SSL_AES128CCM | SSL_AES128CCM8, 0,
0, 0, 0, 0, 0},
{0, SSL_TXT_AES256, 0, 0, 0, SSL_AES256 | SSL_AES256GCM | SSL_AES256CCM | SSL_AES256CCM8, 0,
0, 0, 0, 0, 0},
{0, SSL_TXT_AES, 0, 0, 0, SSL_AES, 0, 0, 0, 0, 0, 0},
{0, SSL_TXT_AES_GCM, 0, 0, 0, SSL_AES128GCM | SSL_AES256GCM, 0, 0, 0, 0,
0, 0},
{0, SSL_TXT_AES_CCM, 0, 0, 0, SSL_AES128CCM | SSL_AES256CCM | SSL_AES128CCM8 | SSL_AES256CCM8, 0, 0, 0, 0,
0, 0},
{0, SSL_TXT_AES_CCM_8, 0, 0, 0, SSL_AES128CCM8 | SSL_AES256CCM8, 0, 0, 0, 0,
0, 0},
{0, SSL_TXT_CAMELLIA128, 0, 0, 0, SSL_CAMELLIA128, 0, 0, 0, 0, 0, 0},
{0, SSL_TXT_CAMELLIA256, 0, 0, 0, SSL_CAMELLIA256, 0, 0, 0, 0, 0, 0},
{0, SSL_TXT_CAMELLIA, 0, 0, 0, SSL_CAMELLIA128 | SSL_CAMELLIA256, 0, 0, 0,
0, 0, 0},
/* MAC aliases */
{0, SSL_TXT_MD5, 0, 0, 0, 0, SSL_MD5, 0, 0, 0, 0, 0},
{0, SSL_TXT_SHA1, 0, 0, 0, 0, SSL_SHA1, 0, 0, 0, 0, 0},
{0, SSL_TXT_SHA, 0, 0, 0, 0, SSL_SHA1, 0, 0, 0, 0, 0},
{0, SSL_TXT_GOST94, 0, 0, 0, 0, SSL_GOST94, 0, 0, 0, 0, 0},
{0, SSL_TXT_GOST89MAC, 0, 0, 0, 0, SSL_GOST89MAC, 0, 0, 0, 0, 0},
{0, SSL_TXT_SHA256, 0, 0, 0, 0, SSL_SHA256, 0, 0, 0, 0, 0},
{0, SSL_TXT_SHA384, 0, 0, 0, 0, SSL_SHA384, 0, 0, 0, 0, 0},
/* protocol version aliases */
{0, SSL_TXT_SSLV3, 0, 0, 0, 0, 0, SSL_SSLV3, 0, 0, 0, 0},
{0, SSL_TXT_TLSV1, 0, 0, 0, 0, 0, SSL_TLSV1, 0, 0, 0, 0},
{0, SSL_TXT_TLSV1_2, 0, 0, 0, 0, 0, SSL_TLSV1_2, 0, 0, 0, 0},
/* export flag */
{0, SSL_TXT_EXP, 0, 0, 0, 0, 0, 0, SSL_EXPORT, 0, 0, 0},
{0, SSL_TXT_EXPORT, 0, 0, 0, 0, 0, 0, SSL_EXPORT, 0, 0, 0},
/* strength classes */
{0, SSL_TXT_EXP40, 0, 0, 0, 0, 0, 0, SSL_EXP40, 0, 0, 0},
{0, SSL_TXT_EXP56, 0, 0, 0, 0, 0, 0, SSL_EXP56, 0, 0, 0},
{0, SSL_TXT_LOW, 0, 0, 0, 0, 0, 0, SSL_LOW, 0, 0, 0},
{0, SSL_TXT_MEDIUM, 0, 0, 0, 0, 0, 0, SSL_MEDIUM, 0, 0, 0},
{0, SSL_TXT_HIGH, 0, 0, 0, 0, 0, 0, SSL_HIGH, 0, 0, 0},
/* FIPS 140-2 approved ciphersuite */
{0, SSL_TXT_FIPS, 0, 0, 0, ~SSL_eNULL, 0, 0, SSL_FIPS, 0, 0, 0},
/* "EDH-" aliases to "DHE-" labels (for backward compatibility) */
{0, SSL3_TXT_EDH_DSS_DES_40_CBC_SHA, 0,
SSL_kDHE, SSL_aDSS, SSL_DES, SSL_SHA1, SSL_SSLV3, SSL_EXPORT | SSL_EXP40,
0, 0, 0,},
{0, SSL3_TXT_EDH_DSS_DES_64_CBC_SHA, 0,
SSL_kDHE, SSL_aDSS, SSL_DES, SSL_SHA1, SSL_SSLV3, SSL_NOT_EXP | SSL_LOW,
0, 0, 0,},
{0, SSL3_TXT_EDH_DSS_DES_192_CBC3_SHA, 0,
SSL_kDHE, SSL_aDSS, SSL_3DES, SSL_SHA1, SSL_SSLV3,
SSL_NOT_EXP | SSL_HIGH | SSL_FIPS, 0, 0, 0,},
{0, SSL3_TXT_EDH_RSA_DES_40_CBC_SHA, 0,
SSL_kDHE, SSL_aRSA, SSL_DES, SSL_SHA1, SSL_SSLV3, SSL_EXPORT | SSL_EXP40,
0, 0, 0,},
{0, SSL3_TXT_EDH_RSA_DES_64_CBC_SHA, 0,
SSL_kDHE, SSL_aRSA, SSL_DES, SSL_SHA1, SSL_SSLV3, SSL_NOT_EXP | SSL_LOW,
0, 0, 0,},
{0, SSL3_TXT_EDH_RSA_DES_192_CBC3_SHA, 0,
SSL_kDHE, SSL_aRSA, SSL_3DES, SSL_SHA1, SSL_SSLV3,
SSL_NOT_EXP | SSL_HIGH | SSL_FIPS, 0, 0, 0,},
};
/*
* Search for public key algorithm with given name and return its pkey_id if
* it is available. Otherwise return 0
*/
#ifdef OPENSSL_NO_ENGINE
static int get_optional_pkey_id(const char *pkey_name)
{
const EVP_PKEY_ASN1_METHOD *ameth;
int pkey_id = 0;
ameth = EVP_PKEY_asn1_find_str(NULL, pkey_name, -1);
if (ameth) {
EVP_PKEY_asn1_get0_info(&pkey_id, NULL, NULL, NULL, NULL, ameth);
}
return pkey_id;
}
#else
static int get_optional_pkey_id(const char *pkey_name)
{
const EVP_PKEY_ASN1_METHOD *ameth;
ENGINE *tmpeng = NULL;
int pkey_id = 0;
ameth = EVP_PKEY_asn1_find_str(&tmpeng, pkey_name, -1);
if (ameth) {
EVP_PKEY_asn1_get0_info(&pkey_id, NULL, NULL, NULL, NULL, ameth);
}
if (tmpeng)
ENGINE_finish(tmpeng);
return pkey_id;
}
#endif
/* masks of disabled algorithms */
static unsigned long disabled_enc_mask;
static unsigned long disabled_mac_mask;
static unsigned long disabled_mkey_mask;
static unsigned long disabled_auth_mask;
void ssl_load_ciphers(void)
{
size_t i;
const ssl_cipher_table *t;
disabled_enc_mask = 0;
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;
}
}
#ifdef SSL_FORBID_ENULL
disabled_enc_mask |= SSL_eNULL;
#endif
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 {
ssl_mac_secret_size[i] = EVP_MD_size(md);
OPENSSL_assert(ssl_mac_secret_size[i] >= 0);
}
}
/* Make sure we can access MD5 and SHA1 */
OPENSSL_assert(ssl_digest_methods[SSL_MD_MD5_IDX] != NULL);
OPENSSL_assert(ssl_digest_methods[SSL_MD_SHA1_IDX] != NULL);
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_kDHr | SSL_kDHd | SSL_kDHE | SSL_kDHEPSK;
disabled_auth_mask |= SSL_aDH;
#endif
#ifdef OPENSSL_NO_EC
disabled_mkey_mask |= SSL_kECDHe | SSL_kECDHr | SSL_kECDHEPSK;
disabled_auth_mask |= SSL_aECDSA | SSL_aECDH;
#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;
}
if (!get_optional_pkey_id("gost2001"))
disabled_auth_mask |= SSL_aGOST01;
/*
* Disable GOST key exchange if no GOST signature algs are available *
*/
if ((disabled_auth_mask & SSL_aGOST01) == SSL_aGOST01)
disabled_mkey_mask |= SSL_kGOST;
}
#ifndef OPENSSL_NO_COMP
static int sk_comp_cmp(const SSL_COMP *const *a, const SSL_COMP *const *b)
{
return ((*a)->id - (*b)->id);
}
static void load_builtin_compressions(void)
{
int got_write_lock = 0;
CRYPTO_r_lock(CRYPTO_LOCK_SSL);
if (ssl_comp_methods == NULL) {
CRYPTO_r_unlock(CRYPTO_LOCK_SSL);
CRYPTO_w_lock(CRYPTO_LOCK_SSL);
got_write_lock = 1;
if (ssl_comp_methods == NULL) {
SSL_COMP *comp = NULL;
COMP_METHOD *method = COMP_zlib();
MemCheck_off();
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);
}
}
MemCheck_on();
}
}
if (got_write_lock)
CRYPTO_w_unlock(CRYPTO_LOCK_SSL);
else
CRYPTO_r_unlock(CRYPTO_LOCK_SSL);
}
#endif
int ssl_cipher_get_evp(const SSL_SESSION *s, const EVP_CIPHER **enc,
const EVP_MD **md, int *mac_pkey_type,
int *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
load_builtin_compressions();
#endif
*comp = NULL;
ctmp.id = s->compress_meth;
if (ssl_comp_methods != NULL) {
i = sk_SSL_COMP_find(ssl_comp_methods, &ctmp);
if (i >= 0)
*comp = sk_SSL_COMP_value(ssl_comp_methods, i);
else
*comp = NULL;
}
/* 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 (FIPS_mode())
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);
}
int ssl_get_handshake_digest(int idx, long *mask, const EVP_MD **md)
{
if (idx < 0 || idx >= SSL_MD_NUM_IDX) {
return 0;
}
*mask = ssl_handshake_digest_flag[idx];
if (*mask)
*md = ssl_digest_methods[idx];
else
*md = NULL;
return 1;
}
#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,
unsigned long disabled_mkey,
unsigned long disabled_auth,
unsigned long disabled_enc,
unsigned long disabled_mac,
unsigned long disabled_ssl,
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 &&
(!FIPS_mode() || (c->algo_strength & SSL_FIPS)) &&
!(c->algorithm_mkey & disabled_mkey) &&
!(c->algorithm_auth & disabled_auth) &&
!(c->algorithm_enc & disabled_enc) &&
!(c->algorithm_mac & disabled_mac) &&
!(c->algorithm_ssl & disabled_ssl)) {
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++;
/*
* if (!sk_push(ca_list,(char *)c)) goto err;
*/
}
}
/*
* 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,
unsigned long disabled_mkey,
unsigned long disabled_auth,
unsigned long disabled_enc,
unsigned long disabled_mac,
unsigned long disabled_ssl,
CIPHER_ORDER *head)
{
CIPHER_ORDER *ciph_curr;
const SSL_CIPHER **ca_curr;
int i;
unsigned long mask_mkey = ~disabled_mkey;
unsigned long mask_auth = ~disabled_auth;
unsigned long mask_enc = ~disabled_enc;
unsigned long mask_mac = ~disabled_mac;
unsigned long mask_ssl = ~disabled_ssl;
/*
* 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++) {
unsigned long algorithm_mkey = cipher_aliases[i].algorithm_mkey;
unsigned long algorithm_auth = cipher_aliases[i].algorithm_auth;
unsigned long algorithm_enc = cipher_aliases[i].algorithm_enc;
unsigned long algorithm_mac = cipher_aliases[i].algorithm_mac;
unsigned long algorithm_ssl = cipher_aliases[i].algorithm_ssl;
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;
if (algorithm_ssl)
if ((algorithm_ssl & mask_ssl) == 0)
continue;
*ca_curr = (SSL_CIPHER *)(cipher_aliases + i);
ca_curr++;
}
*ca_curr = NULL; /* end of list */
}
static void ssl_cipher_apply_rule(unsigned long cipher_id,
unsigned long alg_mkey,
unsigned long alg_auth,
unsigned long alg_enc,
unsigned long alg_mac,
unsigned long alg_ssl,
unsigned long algo_strength, int rule,
int 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 %08lx/%08lx/%08lx/%08lx/%08lx %08lx (%d)\n",
rule, alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl,
algo_strength, strength_bits);
#endif
if (rule == CIPHER_DEL)
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 = %08lx/%08lx/%08lx/%08lx/%08lx Algo_strength = %08lx\n",
cp->name, cp->algorithm_mkey, cp->algorithm_auth,
cp->algorithm_enc, cp->algorithm_mac, cp->algorithm_ssl,
cp->algo_strength);
#endif
#ifdef OPENSSL_SSL_DEBUG_BROKEN_PROTOCOL
if (cipher_id && cipher_id != cp->id)
continue;
#endif
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 (alg_ssl && !(alg_ssl & cp->algorithm_ssl))
continue;
if ((algo_strength & SSL_EXP_MASK)
&& !(algo_strength & SSL_EXP_MASK & cp->algo_strength))
continue;
if ((algo_strength & SSL_STRONG_MASK)
&& !(algo_strength & SSL_STRONG_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_KILL) {