2021 lines
66 KiB
C
2021 lines
66 KiB
C
/* ssl/ssl_ciph.c */
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/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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* All rights reserved.
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*
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* This package is an SSL implementation written
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* by Eric Young (eay@cryptsoft.com).
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* The implementation was written so as to conform with Netscapes SSL.
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*
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* This library is free for commercial and non-commercial use as long as
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* the following conditions are aheared to. The following conditions
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* apply to all code found in this distribution, be it the RC4, RSA,
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* lhash, DES, etc., code; not just the SSL code. The SSL documentation
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* included with this distribution is covered by the same copyright terms
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* except that the holder is Tim Hudson (tjh@cryptsoft.com).
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*
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* Copyright remains Eric Young's, and as such any Copyright notices in
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* the code are not to be removed.
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* If this package is used in a product, Eric Young should be given attribution
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* as the author of the parts of the library used.
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* This can be in the form of a textual message at program startup or
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* in documentation (online or textual) provided with the package.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* "This product includes cryptographic software written by
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* Eric Young (eay@cryptsoft.com)"
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* The word 'cryptographic' can be left out if the rouines from the library
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* being used are not cryptographic related :-).
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* 4. If you include any Windows specific code (or a derivative thereof) from
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* the apps directory (application code) you must include an acknowledgement:
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* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
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*
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* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* The licence and distribution terms for any publically available version or
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* derivative of this code cannot be changed. i.e. this code cannot simply be
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* copied and put under another distribution licence
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* [including the GNU Public Licence.]
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*/
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/* ====================================================================
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* Copyright (c) 1998-2007 The OpenSSL Project. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* 3. All advertising materials mentioning features or use of this
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* software must display the following acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
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*
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* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
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* endorse or promote products derived from this software without
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* prior written permission. For written permission, please contact
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* openssl-core@openssl.org.
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*
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* 5. Products derived from this software may not be called "OpenSSL"
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* nor may "OpenSSL" appear in their names without prior written
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* permission of the OpenSSL Project.
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*
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* 6. Redistributions of any form whatsoever must retain the following
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* acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit (http://www.openssl.org/)"
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*
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* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
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* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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* ====================================================================
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*
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* This product includes cryptographic software written by Eric Young
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* (eay@cryptsoft.com). This product includes software written by Tim
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* Hudson (tjh@cryptsoft.com).
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*
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*/
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/* ====================================================================
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* Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
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* ECC cipher suite support in OpenSSL originally developed by
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* SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
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*/
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/* ====================================================================
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* Copyright 2005 Nokia. All rights reserved.
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*
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* The portions of the attached software ("Contribution") is developed by
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* Nokia Corporation and is licensed pursuant to the OpenSSL open source
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* license.
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*
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* The Contribution, originally written by Mika Kousa and Pasi Eronen of
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* Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
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* support (see RFC 4279) to OpenSSL.
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*
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* No patent licenses or other rights except those expressly stated in
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* the OpenSSL open source license shall be deemed granted or received
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* expressly, by implication, estoppel, or otherwise.
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*
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* No assurances are provided by Nokia that the Contribution does not
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* infringe the patent or other intellectual property rights of any third
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* party or that the license provides you with all the necessary rights
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* to make use of the Contribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
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* ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
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* SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
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* OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
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* OTHERWISE.
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*/
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#include <stdio.h>
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#include <openssl/objects.h>
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#ifndef OPENSSL_NO_COMP
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# include <openssl/comp.h>
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#endif
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#ifndef OPENSSL_NO_ENGINE
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# include <openssl/engine.h>
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#endif
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#include "ssl_locl.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_NUM_IDX 18
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/* NB: make sure indices in these tables match values above */
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typedef struct {
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unsigned long 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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};
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static const EVP_CIPHER *ssl_cipher_methods[SSL_ENC_NUM_IDX] = {
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NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
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NULL, NULL
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};
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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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#define SSL_MD_MD5_IDX 0
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#define SSL_MD_SHA1_IDX 1
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#define SSL_MD_GOST94_IDX 2
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#define SSL_MD_GOST89MAC_IDX 3
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#define SSL_MD_SHA256_IDX 4
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#define SSL_MD_SHA384_IDX 5
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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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};
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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
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};
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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, unsigned long 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 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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EVP_PKEY_HMAC, EVP_PKEY_HMAC, EVP_PKEY_HMAC, NID_undef,
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EVP_PKEY_HMAC, EVP_PKEY_HMAC
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};
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static int ssl_mac_secret_size[SSL_MD_NUM_IDX] = {
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0, 0, 0, 0, 0, 0
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};
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static const int ssl_handshake_digest_flag[SSL_MD_NUM_IDX] = {
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SSL_HANDSHAKE_MAC_MD5, SSL_HANDSHAKE_MAC_SHA,
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SSL_HANDSHAKE_MAC_GOST94, 0, SSL_HANDSHAKE_MAC_SHA256,
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SSL_HANDSHAKE_MAC_SHA384
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};
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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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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, 0, 0, 0, ~SSL_eNULL, 0, 0, 0, 0, 0, 0},
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/* "COMPLEMENTOFALL" */
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{0, SSL_TXT_CMPALL, 0, 0, 0, SSL_eNULL, 0, 0, 0, 0, 0, 0},
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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, 0, SSL_kDHE | SSL_kECDHE, SSL_aNULL, ~SSL_eNULL, 0, 0,
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0, 0, 0, 0},
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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, 0, SSL_kRSA, 0, 0, 0, 0, 0, 0, 0, 0},
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{0, SSL_TXT_kDHr, 0, SSL_kDHr, 0, 0, 0, 0, 0, 0, 0, 0},
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{0, SSL_TXT_kDHd, 0, SSL_kDHd, 0, 0, 0, 0, 0, 0, 0, 0},
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{0, SSL_TXT_kDH, 0, SSL_kDHr | SSL_kDHd, 0, 0, 0, 0, 0, 0, 0, 0},
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{0, SSL_TXT_kEDH, 0, SSL_kDHE, 0, 0, 0, 0, 0, 0, 0, 0},
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{0, SSL_TXT_kDHE, 0, SSL_kDHE, 0, 0, 0, 0, 0, 0, 0, 0},
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{0, SSL_TXT_DH, 0, SSL_kDHr | SSL_kDHd | SSL_kDHE, 0, 0, 0, 0, 0, 0, 0,
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0},
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{0, SSL_TXT_kECDHr, 0, SSL_kECDHr, 0, 0, 0, 0, 0, 0, 0, 0},
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{0, SSL_TXT_kECDHe, 0, SSL_kECDHe, 0, 0, 0, 0, 0, 0, 0, 0},
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{0, SSL_TXT_kECDH, 0, SSL_kECDHr | SSL_kECDHe, 0, 0, 0, 0, 0, 0, 0, 0},
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{0, SSL_TXT_kEECDH, 0, SSL_kECDHE, 0, 0, 0, 0, 0, 0, 0, 0},
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{0, SSL_TXT_kECDHE, 0, SSL_kECDHE, 0, 0, 0, 0, 0, 0, 0, 0},
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{0, SSL_TXT_ECDH, 0, SSL_kECDHr | SSL_kECDHe | SSL_kECDHE, 0, 0, 0, 0, 0,
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0, 0, 0},
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{0, SSL_TXT_kPSK, 0, SSL_kPSK, 0, 0, 0, 0, 0, 0, 0, 0},
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{0, SSL_TXT_kRSAPSK, 0, SSL_kRSAPSK, 0, 0, 0, 0, 0, 0, 0, 0},
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{0, SSL_TXT_kECDHEPSK, 0, SSL_kECDHEPSK, 0, 0, 0, 0, 0, 0, 0, 0},
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{0, SSL_TXT_kDHEPSK, 0, SSL_kDHEPSK, 0, 0, 0, 0, 0, 0, 0, 0},
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{0, SSL_TXT_kSRP, 0, SSL_kSRP, 0, 0, 0, 0, 0, 0, 0, 0},
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{0, SSL_TXT_kGOST, 0, SSL_kGOST, 0, 0, 0, 0, 0, 0, 0, 0},
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/* server authentication aliases */
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{0, SSL_TXT_aRSA, 0, 0, SSL_aRSA, 0, 0, 0, 0, 0, 0, 0},
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{0, SSL_TXT_aDSS, 0, 0, SSL_aDSS, 0, 0, 0, 0, 0, 0, 0},
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{0, SSL_TXT_DSS, 0, 0, SSL_aDSS, 0, 0, 0, 0, 0, 0, 0},
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{0, SSL_TXT_aNULL, 0, 0, SSL_aNULL, 0, 0, 0, 0, 0, 0, 0},
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/* no such ciphersuites supported! */
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{0, SSL_TXT_aDH, 0, 0, SSL_aDH, 0, 0, 0, 0, 0, 0, 0},
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{0, SSL_TXT_aECDH, 0, 0, SSL_aECDH, 0, 0, 0, 0, 0, 0, 0},
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{0, SSL_TXT_aECDSA, 0, 0, SSL_aECDSA, 0, 0, 0, 0, 0, 0, 0},
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{0, SSL_TXT_ECDSA, 0, 0, SSL_aECDSA, 0, 0, 0, 0, 0, 0, 0},
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{0, SSL_TXT_aPSK, 0, 0, SSL_aPSK, 0, 0, 0, 0, 0, 0, 0},
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{0, SSL_TXT_aGOST01, 0, 0, SSL_aGOST01, 0, 0, 0, 0, 0, 0, 0},
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{0, SSL_TXT_aGOST, 0, 0, SSL_aGOST01, 0, 0, 0, 0, 0, 0, 0},
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{0, SSL_TXT_aSRP, 0, 0, SSL_aSRP, 0, 0, 0, 0, 0, 0, 0},
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/* aliases combining key exchange and server authentication */
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{0, SSL_TXT_EDH, 0, SSL_kDHE, ~SSL_aNULL, 0, 0, 0, 0, 0, 0, 0},
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{0, SSL_TXT_DHE, 0, SSL_kDHE, ~SSL_aNULL, 0, 0, 0, 0, 0, 0, 0},
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{0, SSL_TXT_EECDH, 0, SSL_kECDHE, ~SSL_aNULL, 0, 0, 0, 0, 0, 0, 0},
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{0, SSL_TXT_ECDHE, 0, SSL_kECDHE, ~SSL_aNULL, 0, 0, 0, 0, 0, 0, 0},
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{0, SSL_TXT_NULL, 0, 0, 0, SSL_eNULL, 0, 0, 0, 0, 0, 0},
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{0, SSL_TXT_RSA, 0, SSL_kRSA, SSL_aRSA, 0, 0, 0, 0, 0, 0, 0},
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{0, SSL_TXT_ADH, 0, SSL_kDHE, SSL_aNULL, 0, 0, 0, 0, 0, 0, 0},
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{0, SSL_TXT_AECDH, 0, SSL_kECDHE, SSL_aNULL, 0, 0, 0, 0, 0, 0, 0},
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{0, SSL_TXT_PSK, 0, SSL_PSK, 0, 0, 0, 0, 0, 0, 0, 0},
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{0, SSL_TXT_SRP, 0, SSL_kSRP, 0, 0, 0, 0, 0, 0, 0, 0},
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/* symmetric encryption aliases */
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{0, SSL_TXT_DES, 0, 0, 0, SSL_DES, 0, 0, 0, 0, 0, 0},
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{0, SSL_TXT_3DES, 0, 0, 0, SSL_3DES, 0, 0, 0, 0, 0, 0},
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{0, SSL_TXT_RC4, 0, 0, 0, SSL_RC4, 0, 0, 0, 0, 0, 0},
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{0, SSL_TXT_RC2, 0, 0, 0, SSL_RC2, 0, 0, 0, 0, 0, 0},
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{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) {
|
|
/* 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 && (curr->cipher->strength_bits > max_strength_bits))
|
|
max_strength_bits = curr->cipher->strength_bits;
|
|
curr = curr->next;
|
|
}
|
|
|
|
number_uses = OPENSSL_malloc(sizeof(int) * (max_strength_bits + 1));
|
|
if (!number_uses) {
|
|
SSLerr(SSL_F_SSL_CIPHER_STRENGTH_SORT, ERR_R_MALLOC_FAILURE);
|
|
return (0);
|
|
}
|
|
memset(number_uses, 0, sizeof(int) * (max_strength_bits + 1));
|
|
|
|
/*
|
|
* 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)
|
|
{
|
|
unsigned long alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl,
|
|
algo_strength;
|
|
const char *l, *buf;
|
|
int j, multi, found, rule, retval, ok, buflen;
|
|
unsigned long 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;
|
|
alg_ssl = 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(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_EXP_MASK) {
|
|
if (algo_strength & SSL_EXP_MASK) {
|
|
algo_strength &=
|
|
(ca_list[j]->algo_strength & SSL_EXP_MASK) |
|
|
~SSL_EXP_MASK;
|
|
if (!(algo_strength & SSL_EXP_MASK)) {
|
|
found = 0;
|
|
break;
|
|
}
|
|
} else
|
|
algo_strength |= ca_list[j]->algo_strength & SSL_EXP_MASK;
|
|
}
|
|
|
|
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]->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]->algorithm_ssl) {
|
|
if (alg_ssl) {
|
|
alg_ssl &= ca_list[j]->algorithm_ssl;
|
|
if (!alg_ssl) {
|
|
found = 0;
|
|
break;
|
|
}
|
|
} else
|
|
alg_ssl = ca_list[j]->algorithm_ssl;
|
|
}
|
|
}
|
|
|
|
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,
|
|
alg_ssl, 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 (strcmp(*prule_str, "SUITEB128") == 0)
|
|
suiteb_flags = SSL_CERT_FLAG_SUITEB_128_LOS;
|
|
else if (strcmp(*prule_str, "SUITEB128ONLY") == 0)
|
|
suiteb_flags = SSL_CERT_FLAG_SUITEB_128_LOS_ONLY;
|
|
else if (strcmp(*prule_str, "SUITEB128C2") == 0) {
|
|
suiteb_comb2 = 1;
|
|
suiteb_flags = SSL_CERT_FLAG_SUITEB_128_LOS;
|
|
} else if (strcmp(*prule_str, "SUITEB192") == 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)) {
|
|
if (meth->ssl3_enc->enc_flags & SSL_ENC_FLAG_DTLS)
|
|
SSLerr(SSL_F_CHECK_SUITEB_CIPHER_LIST,
|
|
SSL_R_ONLY_DTLS_1_2_ALLOWED_IN_SUITEB_MODE);
|
|
else
|
|
SSLerr(SSL_F_CHECK_SUITEB_CIPHER_LIST,
|
|
SSL_R_ONLY_TLS_1_2_ALLOWED_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;
|
|
}
|
|
/* Set auto ECDH parameter determination */
|
|
c->ecdh_tmp_auto = 1;
|
|
return 1;
|
|
# else
|
|
SSLerr(SSL_F_CHECK_SUITEB_CIPHER_LIST,
|
|
SSL_R_ECDH_REQUIRED_FOR_SUITEB_MODE);
|
|
return 0;
|
|
# endif
|
|
}
|
|
#endif
|
|
|
|
STACK_OF(SSL_CIPHER) *ssl_create_cipher_list(const SSL_METHOD *ssl_method, 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;
|
|
unsigned long disabled_mkey, disabled_auth, disabled_enc, disabled_mac,
|
|
disabled_ssl;
|
|
STACK_OF(SSL_CIPHER) *cipherstack, *tmp_cipher_list;
|
|
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;
|
|
disabled_ssl = 0;
|
|
|
|
/*
|
|
* 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, disabled_ssl, co_list, &head,
|
|
&tail);
|
|
|
|
/* Now arrange all ciphers by preference: */
|
|
|
|
/*
|
|
* Everything else being equal, prefer ephemeral ECDH over other key
|
|
* exchange mechanisms
|
|
*/
|
|
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);
|
|
|
|
/* AES is our preferred symmetric cipher */
|
|
ssl_cipher_apply_rule(0, 0, 0, SSL_AES, 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);
|
|
|
|
/* Move ciphers without forward secrecy to the end */
|
|
ssl_cipher_apply_rule(0, 0, SSL_aECDH, 0, 0, 0, 0, CIPHER_ORD, -1, &head,
|
|
&tail);
|
|
/*
|
|
* ssl_cipher_apply_rule(0, 0, SSL_aDH, 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 the 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;
|
|
}
|
|
|
|
/* 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, disabled_ssl, 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);
|
|
}
|
|
|
|
/*
|
|
* 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
|
|
&& (!FIPS_mode() || curr->cipher->algo_strength & SSL_FIPS)) {
|
|
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 */
|
|
|
|
tmp_cipher_list = sk_SSL_CIPHER_dup(cipherstack);
|
|
if (tmp_cipher_list == NULL) {
|
|
sk_SSL_CIPHER_free(cipherstack);
|
|
return NULL;
|
|
}
|
|
sk_SSL_CIPHER_free(*cipher_list);
|
|
*cipher_list = cipherstack;
|
|
if (*cipher_list_by_id != NULL)
|
|
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 (cipherstack);
|
|
}
|
|
|
|
char *SSL_CIPHER_description(const SSL_CIPHER *cipher, char *buf, int len)
|
|
{
|
|
int is_export, pkl, kl;
|
|
const char *ver, *exp_str;
|
|
const char *kx, *au, *enc, *mac;
|
|
unsigned long alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl;
|
|
static const char *format =
|
|
"%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s%s\n";
|
|
|
|
alg_mkey = cipher->algorithm_mkey;
|
|
alg_auth = cipher->algorithm_auth;
|
|
alg_enc = cipher->algorithm_enc;
|
|
alg_mac = cipher->algorithm_mac;
|
|
alg_ssl = cipher->algorithm_ssl;
|
|
|
|
is_export = SSL_C_IS_EXPORT(cipher);
|
|
pkl = SSL_C_EXPORT_PKEYLENGTH(cipher);
|
|
kl = SSL_C_EXPORT_KEYLENGTH(cipher);
|
|
exp_str = is_export ? " export" : "";
|
|
|
|
if (alg_ssl & SSL_SSLV3)
|
|
ver = "SSLv3";
|
|
else if (alg_ssl & SSL_TLSV1_2)
|
|
ver = "TLSv1.2";
|
|
else
|
|
ver = "unknown";
|
|
|
|
switch (alg_mkey) {
|
|
case SSL_kRSA:
|
|
kx = is_export ? (pkl == 512 ? "RSA(512)" : "RSA(1024)") : "RSA";
|
|
break;
|
|
case SSL_kDHr:
|
|
kx = "DH/RSA";
|
|
break;
|
|
case SSL_kDHd:
|
|
kx = "DH/DSS";
|
|
break;
|
|
case SSL_kDHE:
|
|
kx = is_export ? (pkl == 512 ? "DH(512)" : "DH(1024)") : "DH";
|
|
break;
|
|
case SSL_kECDHr:
|
|
kx = "ECDH/RSA";
|
|
break;
|
|
case SSL_kECDHe:
|
|
kx = "ECDH/ECDSA";
|
|
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;
|
|
default:
|
|
kx = "unknown";
|
|
}
|
|
|
|
switch (alg_auth) {
|
|
case SSL_aRSA:
|
|
au = "RSA";
|
|
break;
|
|
case SSL_aDSS:
|
|
au = "DSS";
|
|
break;
|
|
case SSL_aDH:
|
|
au = "DH";
|
|
break;
|
|
case SSL_aECDH:
|
|
au = "ECDH";
|
|
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;
|
|
default:
|
|
au = "unknown";
|
|
break;
|
|
}
|
|
|
|
switch (alg_enc) {
|
|
case SSL_DES:
|
|
enc = (is_export && kl == 5) ? "DES(40)" : "DES(56)";
|
|
break;
|
|
case SSL_3DES:
|
|
enc = "3DES(168)";
|
|
break;
|
|
case SSL_RC4:
|
|
enc = is_export ? (kl == 5 ? "RC4(40)" : "RC4(56)") : "RC4(128)";
|
|
break;
|
|
case SSL_RC2:
|
|
enc = is_export ? (kl == 5 ? "RC2(40)" : "RC2(56)") : "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_SEED:
|
|
enc = "SEED(128)";
|
|
break;
|
|
case SSL_eGOST2814789CNT:
|
|
enc = "GOST89(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:
|
|
mac = "GOST89";
|
|
break;
|
|
case SSL_GOST94:
|
|
mac = "GOST94";
|
|
break;
|
|
default:
|
|
mac = "unknown";
|
|
break;
|
|
}
|
|
|
|
if (buf == NULL) {
|
|
len = 128;
|
|
buf = OPENSSL_malloc(len);
|
|
if (buf == NULL)
|
|
return ("OPENSSL_malloc Error");
|
|
} else if (len < 128)
|
|
return ("Buffer too small");
|
|
|
|
BIO_snprintf(buf, len, format, cipher->name, ver, kx, au, enc, mac,
|
|
exp_str);
|
|
|
|
return (buf);
|
|
}
|
|
|
|
char *SSL_CIPHER_get_version(const SSL_CIPHER *c)
|
|
{
|
|
int i;
|
|
|
|
if (c == NULL)
|
|
return ("(NONE)");
|
|
i = (int)(c->id >> 24L);
|
|
if (i == 3)
|
|
return ("TLSv1/SSLv3");
|
|
else
|
|
return ("unknown");
|
|
}
|
|
|
|
/* return the actual cipher being used */
|
|
const char *SSL_CIPHER_get_name(const SSL_CIPHER *c)
|
|
{
|
|
if (c != NULL)
|
|
return (c->name);
|
|
return ("(NONE)");
|
|
}
|
|
|
|
/* 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 = c->alg_bits;
|
|
ret = c->strength_bits;
|
|
}
|
|
return (ret);
|
|
}
|
|
|
|
unsigned long SSL_CIPHER_get_id(const SSL_CIPHER *c)
|
|
{
|
|
return c->id;
|
|
}
|
|
|
|
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;
|
|
}
|
|
void SSL_COMP_free_compression_methods(void)
|
|
{
|
|
}
|
|
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(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 0;
|
|
}
|
|
|
|
MemCheck_off();
|
|
comp = OPENSSL_malloc(sizeof(*comp));
|
|
if (comp == NULL) {
|
|
MemCheck_on();
|
|
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);
|
|
MemCheck_on();
|
|
SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,
|
|
SSL_R_DUPLICATE_COMPRESSION_ID);
|
|
return (1);
|
|
} else if ((ssl_comp_methods == NULL)
|
|
|| !sk_SSL_COMP_push(ssl_comp_methods, comp)) {
|
|
OPENSSL_free(comp);
|
|
MemCheck_on();
|
|
SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD, ERR_R_MALLOC_FAILURE);
|
|
return (1);
|
|
} else {
|
|
MemCheck_on();
|
|
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
|
|
}
|
|
|
|
/* For a cipher return the index corresponding to the certificate type */
|
|
int ssl_cipher_get_cert_index(const SSL_CIPHER *c)
|
|
{
|
|
unsigned long alg_k, alg_a;
|
|
|
|
alg_k = c->algorithm_mkey;
|
|
alg_a = c->algorithm_auth;
|
|
|
|
if (alg_k & (SSL_kECDHr | SSL_kECDHe)) {
|
|
/*
|
|
* we don't need to look at SSL_kECDHE since no certificate is needed
|
|
* for anon ECDH and for authenticated ECDHE, the check for the auth
|
|
* algorithm will set i correctly NOTE: For ECDH-RSA, we need an ECC
|
|
* not an RSA cert but for ECDHE-RSA we need an RSA cert. Placing the
|
|
* checks for SSL_kECDH before RSA checks ensures the correct cert is
|
|
* chosen.
|
|
*/
|
|
return SSL_PKEY_ECC;
|
|
} else if (alg_a & SSL_aECDSA)
|
|
return SSL_PKEY_ECC;
|
|
else if (alg_k & SSL_kDHr)
|
|
return SSL_PKEY_DH_RSA;
|
|
else if (alg_k & SSL_kDHd)
|
|
return SSL_PKEY_DH_DSA;
|
|
else if (alg_a & SSL_aDSS)
|
|
return SSL_PKEY_DSA_SIGN;
|
|
else if (alg_a & SSL_aRSA)
|
|
return SSL_PKEY_RSA_ENC;
|
|
else if (alg_a & SSL_aGOST01)
|
|
return SSL_PKEY_GOST01;
|
|
return -1;
|
|
}
|
|
|
|
const SSL_CIPHER *ssl_get_cipher_by_char(SSL *ssl, const unsigned char *ptr)
|
|
{
|
|
const SSL_CIPHER *c;
|
|
c = ssl->method->get_cipher_by_char(ptr);
|
|
if (c == NULL || 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 -1;
|
|
i = ssl_cipher_info_lookup(ssl_cipher_table_cipher, c->algorithm_enc);
|
|
if (i == -1)
|
|
return -1;
|
|
return ssl_cipher_table_cipher[i].nid;
|
|
}
|
|
|
|
int SSL_CIPHER_get_digest_nid(const SSL_CIPHER *c)
|
|
{
|
|
int i;
|
|
if (c == NULL)
|
|
return -1;
|
|
i = ssl_cipher_info_lookup(ssl_cipher_table_mac, c->algorithm_mac);
|
|
if (i == -1)
|
|
return -1;
|
|
return ssl_cipher_table_mac[i].nid;
|
|
}
|