1705 lines
41 KiB
C
Executable File
1705 lines
41 KiB
C
Executable File
/* $OpenBSD: ssl_ciph.c,v 1.119 2020/09/13 16:49:05 jsing Exp $ */
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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_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 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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{
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.name = SSL_TXT_ALL,
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.algorithm_enc = ~SSL_eNULL,
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},
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/* "COMPLEMENTOFALL" */
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{
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.name = SSL_TXT_CMPALL,
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.algorithm_enc = SSL_eNULL,
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},
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/*
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* "COMPLEMENTOFDEFAULT"
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* (does *not* include ciphersuites not found in ALL!)
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*/
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{
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.name = SSL_TXT_CMPDEF,
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.algorithm_mkey = SSL_kDHE|SSL_kECDHE,
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.algorithm_auth = SSL_aNULL,
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.algorithm_enc = ~SSL_eNULL,
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},
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/*
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* key exchange aliases
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* (some of those using only a single bit here combine multiple key
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* exchange algs according to the RFCs, e.g. kEDH combines DHE_DSS
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* and DHE_RSA)
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*/
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{
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.name = SSL_TXT_kRSA,
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.algorithm_mkey = SSL_kRSA,
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},
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{
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.name = SSL_TXT_kEDH,
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.algorithm_mkey = SSL_kDHE,
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},
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{
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.name = SSL_TXT_DH,
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.algorithm_mkey = SSL_kDHE,
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},
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{
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.name = SSL_TXT_kEECDH,
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.algorithm_mkey = SSL_kECDHE,
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},
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{
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.name = SSL_TXT_ECDH,
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.algorithm_mkey = SSL_kECDHE,
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},
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{
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.name = SSL_TXT_kGOST,
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.algorithm_mkey = SSL_kGOST,
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},
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/* server authentication aliases */
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{
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.name = SSL_TXT_aRSA,
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.algorithm_auth = SSL_aRSA,
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},
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{
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.name = SSL_TXT_aDSS,
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.algorithm_auth = SSL_aDSS,
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},
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{
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.name = SSL_TXT_DSS,
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.algorithm_auth = SSL_aDSS,
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},
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{
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.name = SSL_TXT_aNULL,
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.algorithm_auth = SSL_aNULL,
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},
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{
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.name = SSL_TXT_aECDSA,
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.algorithm_auth = SSL_aECDSA,
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},
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{
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.name = SSL_TXT_ECDSA,
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.algorithm_auth = SSL_aECDSA,
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},
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{
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.name = SSL_TXT_aGOST01,
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.algorithm_auth = SSL_aGOST01,
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},
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{
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.name = SSL_TXT_aGOST,
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.algorithm_auth = SSL_aGOST01,
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},
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/* aliases combining key exchange and server authentication */
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{
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.name = SSL_TXT_DHE,
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.algorithm_mkey = SSL_kDHE,
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.algorithm_auth = ~SSL_aNULL,
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},
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{
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.name = SSL_TXT_EDH,
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.algorithm_mkey = SSL_kDHE,
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.algorithm_auth = ~SSL_aNULL,
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},
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{
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.name = SSL_TXT_ECDHE,
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.algorithm_mkey = SSL_kECDHE,
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.algorithm_auth = ~SSL_aNULL,
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},
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{
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.name = SSL_TXT_EECDH,
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.algorithm_mkey = SSL_kECDHE,
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.algorithm_auth = ~SSL_aNULL,
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},
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{
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.name = SSL_TXT_NULL,
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.algorithm_enc = SSL_eNULL,
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},
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{
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.name = SSL_TXT_RSA,
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.algorithm_mkey = SSL_kRSA,
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.algorithm_auth = SSL_aRSA,
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},
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{
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.name = SSL_TXT_ADH,
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.algorithm_mkey = SSL_kDHE,
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.algorithm_auth = SSL_aNULL,
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},
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{
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.name = SSL_TXT_AECDH,
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.algorithm_mkey = SSL_kECDHE,
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.algorithm_auth = SSL_aNULL,
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},
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/* symmetric encryption aliases */
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{
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.name = SSL_TXT_3DES,
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.algorithm_enc = SSL_3DES,
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},
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{
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.name = SSL_TXT_RC4,
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.algorithm_enc = SSL_RC4,
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},
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{
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.name = SSL_TXT_eNULL,
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.algorithm_enc = SSL_eNULL,
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},
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{
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.name = SSL_TXT_AES128,
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.algorithm_enc = SSL_AES128|SSL_AES128GCM,
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},
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{
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.name = SSL_TXT_AES256,
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.algorithm_enc = SSL_AES256|SSL_AES256GCM,
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},
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{
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.name = SSL_TXT_AES,
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.algorithm_enc = SSL_AES,
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},
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{
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.name = SSL_TXT_AES_GCM,
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.algorithm_enc = SSL_AES128GCM|SSL_AES256GCM,
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},
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{
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.name = SSL_TXT_CAMELLIA128,
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.algorithm_enc = SSL_CAMELLIA128,
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},
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{
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.name = SSL_TXT_CAMELLIA256,
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.algorithm_enc = SSL_CAMELLIA256,
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},
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{
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.name = SSL_TXT_CAMELLIA,
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.algorithm_enc = SSL_CAMELLIA128|SSL_CAMELLIA256,
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},
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{
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.name = SSL_TXT_CHACHA20,
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.algorithm_enc = SSL_CHACHA20POLY1305,
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},
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/* MAC aliases */
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{
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.name = SSL_TXT_AEAD,
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.algorithm_mac = SSL_AEAD,
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},
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{
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.name = SSL_TXT_MD5,
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.algorithm_mac = SSL_MD5,
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},
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{
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.name = SSL_TXT_SHA1,
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.algorithm_mac = SSL_SHA1,
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},
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{
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.name = SSL_TXT_SHA,
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.algorithm_mac = SSL_SHA1,
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},
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{
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.name = SSL_TXT_GOST94,
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.algorithm_mac = SSL_GOST94,
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},
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{
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.name = SSL_TXT_GOST89MAC,
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.algorithm_mac = SSL_GOST89MAC,
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},
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{
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.name = SSL_TXT_SHA256,
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.algorithm_mac = SSL_SHA256,
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},
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{
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.name = SSL_TXT_SHA384,
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.algorithm_mac = SSL_SHA384,
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},
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{
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.name = SSL_TXT_STREEBOG256,
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.algorithm_mac = SSL_STREEBOG256,
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},
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/* protocol version aliases */
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{
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.name = SSL_TXT_SSLV3,
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.algorithm_ssl = SSL_SSLV3,
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},
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{
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.name = SSL_TXT_TLSV1,
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.algorithm_ssl = SSL_TLSV1,
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},
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{
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.name = SSL_TXT_TLSV1_2,
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.algorithm_ssl = SSL_TLSV1_2,
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},
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{
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.name = SSL_TXT_TLSV1_3,
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.algorithm_ssl = SSL_TLSV1_3,
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},
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/* cipher suite aliases */
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#ifdef LIBRESSL_HAS_TLS1_3
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{
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.valid = 1,
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.name = "TLS_AES_128_GCM_SHA256",
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.id = TLS1_3_CK_AES_128_GCM_SHA256,
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.algorithm_ssl = SSL_TLSV1_3,
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},
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{
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.valid = 1,
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.name = "TLS_AES_256_GCM_SHA384",
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.id = TLS1_3_CK_AES_256_GCM_SHA384,
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.algorithm_ssl = SSL_TLSV1_3,
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},
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{
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.valid = 1,
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.name = "TLS_CHACHA20_POLY1305_SHA256",
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.id = TLS1_3_CK_CHACHA20_POLY1305_SHA256,
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.algorithm_ssl = SSL_TLSV1_3,
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},
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#endif
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/* strength classes */
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{
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.name = SSL_TXT_LOW,
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.algo_strength = SSL_LOW,
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},
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{
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.name = SSL_TXT_MEDIUM,
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.algo_strength = SSL_MEDIUM,
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},
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{
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.name = SSL_TXT_HIGH,
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.algo_strength = SSL_HIGH,
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},
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};
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int
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ssl_cipher_get_evp(const SSL_SESSION *ss, const EVP_CIPHER **enc,
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const EVP_MD **md, int *mac_pkey_type, int *mac_secret_size)
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{
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*enc = NULL;
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*md = NULL;
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*mac_pkey_type = NID_undef;
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*mac_secret_size = 0;
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if (ss->cipher == NULL)
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return 0;
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/*
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* This function does not handle EVP_AEAD.
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* See ssl_cipher_get_aead_evp instead.
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*/
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if (ss->cipher->algorithm_mac & SSL_AEAD)
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return 0;
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switch (ss->cipher->algorithm_enc) {
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case SSL_3DES:
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*enc = EVP_des_ede3_cbc();
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break;
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case SSL_RC4:
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*enc = EVP_rc4();
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break;
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case SSL_eNULL:
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*enc = EVP_enc_null();
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break;
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case SSL_AES128:
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*enc = EVP_aes_128_cbc();
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break;
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case SSL_AES256:
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*enc = EVP_aes_256_cbc();
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break;
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case SSL_CAMELLIA128:
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*enc = EVP_camellia_128_cbc();
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break;
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case SSL_CAMELLIA256:
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*enc = EVP_camellia_256_cbc();
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break;
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case SSL_eGOST2814789CNT:
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*enc = EVP_gost2814789_cnt();
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break;
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}
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switch (ss->cipher->algorithm_mac) {
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case SSL_MD5:
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*md = EVP_md5();
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break;
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case SSL_SHA1:
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*md = EVP_sha1();
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break;
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case SSL_SHA256:
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*md = EVP_sha256();
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break;
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case SSL_SHA384:
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*md = EVP_sha384();
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break;
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case SSL_GOST89MAC:
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*md = EVP_gost2814789imit();
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break;
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case SSL_GOST94:
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*md = EVP_gostr341194();
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break;
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case SSL_STREEBOG256:
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*md = EVP_streebog256();
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break;
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}
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if (*enc == NULL || *md == NULL)
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return 0;
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|
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/*
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* EVP_CIPH_FLAG_AEAD_CIPHER and EVP_CIPH_GCM_MODE ciphers are not
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* supported via EVP_CIPHER (they should be using EVP_AEAD instead).
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*/
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if (EVP_CIPHER_flags(*enc) & EVP_CIPH_FLAG_AEAD_CIPHER)
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return 0;
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if (EVP_CIPHER_mode(*enc) == EVP_CIPH_GCM_MODE)
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return 0;
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|
|
if (ss->cipher->algorithm_mac == SSL_GOST89MAC) {
|
|
*mac_pkey_type = EVP_PKEY_GOSTIMIT;
|
|
*mac_secret_size = 32; /* XXX */
|
|
} else {
|
|
*mac_pkey_type = EVP_PKEY_HMAC;
|
|
*mac_secret_size = EVP_MD_size(*md);
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* ssl_cipher_get_evp_aead sets aead to point to the correct EVP_AEAD object
|
|
* for s->cipher. It returns 1 on success and 0 on error.
|
|
*/
|
|
int
|
|
ssl_cipher_get_evp_aead(const SSL_SESSION *ss, const EVP_AEAD **aead)
|
|
{
|
|
*aead = NULL;
|
|
|
|
if (ss->cipher == NULL)
|
|
return 0;
|
|
if ((ss->cipher->algorithm_mac & SSL_AEAD) == 0)
|
|
return 0;
|
|
|
|
switch (ss->cipher->algorithm_enc) {
|
|
case SSL_AES128GCM:
|
|
*aead = EVP_aead_aes_128_gcm();
|
|
return 1;
|
|
case SSL_AES256GCM:
|
|
*aead = EVP_aead_aes_256_gcm();
|
|
return 1;
|
|
case SSL_CHACHA20POLY1305:
|
|
*aead = EVP_aead_chacha20_poly1305();
|
|
return 1;
|
|
default:
|
|
break;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
ssl_get_handshake_evp_md(SSL *s, const EVP_MD **md)
|
|
{
|
|
*md = NULL;
|
|
|
|
switch (ssl_get_algorithm2(s) & SSL_HANDSHAKE_MAC_MASK) {
|
|
case SSL_HANDSHAKE_MAC_DEFAULT:
|
|
*md = EVP_md5_sha1();
|
|
return 1;
|
|
case SSL_HANDSHAKE_MAC_GOST94:
|
|
*md = EVP_gostr341194();
|
|
return 1;
|
|
case SSL_HANDSHAKE_MAC_SHA256:
|
|
*md = EVP_sha256();
|
|
return 1;
|
|
case SSL_HANDSHAKE_MAC_SHA384:
|
|
*md = EVP_sha384();
|
|
return 1;
|
|
case SSL_HANDSHAKE_MAC_STREEBOG256:
|
|
*md = EVP_streebog256();
|
|
return 1;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
#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_get_disabled(unsigned long *mkey, unsigned long *auth,
|
|
unsigned long *enc, unsigned long *mac, unsigned long *ssl)
|
|
{
|
|
*mkey = 0;
|
|
*auth = 0;
|
|
*enc = 0;
|
|
*mac = 0;
|
|
*ssl = 0;
|
|
|
|
/*
|
|
* Check for the availability of GOST 34.10 public/private key
|
|
* algorithms. If they are not available disable the associated
|
|
* authentication and key exchange algorithms.
|
|
*/
|
|
if (EVP_PKEY_meth_find(NID_id_GostR3410_2001) == NULL) {
|
|
*auth |= SSL_aGOST01;
|
|
*mkey |= SSL_kGOST;
|
|
}
|
|
|
|
#ifdef SSL_FORBID_ENULL
|
|
*enc |= SSL_eNULL;
|
|
#endif
|
|
}
|
|
|
|
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 &&
|
|
!(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;
|
|
|
|
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;
|
|
next = reverse ? curr->prev : curr->next;
|
|
|
|
cp = curr->cipher;
|
|
|
|
if (cipher_id && cp->id != cipher_id)
|
|
continue;
|
|
|
|
/*
|
|
* Selection criteria is either the value of strength_bits
|
|
* or the algorithms used.
|
|
*/
|
|
if (strength_bits >= 0) {
|
|
if (strength_bits != cp->strength_bits)
|
|
continue;
|
|
} else {
|
|
if (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_STRONG_MASK) && !(algo_strength & SSL_STRONG_MASK & cp->algo_strength))
|
|
continue;
|
|
}
|
|
|
|
/* add the cipher if it has not been added yet. */
|
|
if (rule == CIPHER_ADD) {
|
|
/* reverse == 0 */
|
|
if (!curr->active) {
|
|
ll_append_tail(&head, curr, &tail);
|
|
curr->active = 1;
|
|
}
|
|
}
|
|
/* 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 = calloc((max_strength_bits + 1), sizeof(int));
|
|
if (!number_uses) {
|
|
SSLerrorx(ERR_R_MALLOC_FAILURE);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Now find the strength_bits values actually used
|
|
*/
|
|
curr = *head_p;
|
|
while (curr != NULL) {
|
|
if (curr->active)
|
|
number_uses[curr->cipher->strength_bits]++;
|
|
curr = curr->next;
|
|
}
|
|
/*
|
|
* Go through the list of used strength_bits values in descending
|
|
* order.
|
|
*/
|
|
for (i = max_strength_bits; i >= 0; i--)
|
|
if (number_uses[i] > 0)
|
|
ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_ORD, i, head_p, tail_p);
|
|
|
|
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, int *tls13_seen)
|
|
{
|
|
unsigned long alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl;
|
|
unsigned long algo_strength;
|
|
int j, multi, found, rule, retval, ok, buflen;
|
|
unsigned long cipher_id = 0;
|
|
const char *l, *buf;
|
|
char ch;
|
|
|
|
*tls13_seen = 0;
|
|
|
|
retval = 1;
|
|
l = rule_str;
|
|
for (;;) {
|
|
ch = *l;
|
|
|
|
if (ch == '\0')
|
|
break;
|
|
|
|
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;
|
|
while (((ch >= 'A') && (ch <= 'Z')) ||
|
|
((ch >= '0') && (ch <= '9')) ||
|
|
((ch >= 'a') && (ch <= 'z')) ||
|
|
(ch == '-') || (ch == '.') ||
|
|
(ch == '_')) {
|
|
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.
|
|
*/
|
|
SSLerrorx(SSL_R_INVALID_COMMAND);
|
|
retval = found = 0;
|
|
l++;
|
|
break;
|
|
}
|
|
|
|
if (rule == CIPHER_SPECIAL) {
|
|
/* unused -- avoid compiler warning */
|
|
found = 0;
|
|
/* special treatment */
|
|
break;
|
|
}
|
|
|
|
/* 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) &&
|
|
(ca_list[j]->name[buflen] == '\0')) {
|
|
found = 1;
|
|
break;
|
|
} else
|
|
j++;
|
|
}
|
|
|
|
if (!found)
|
|
break; /* ignore this entry */
|
|
|
|
if (ca_list[j]->algorithm_mkey) {
|
|
if (alg_mkey) {
|
|
alg_mkey &= ca_list[j]->algorithm_mkey;
|
|
if (!alg_mkey) {
|
|
found = 0;
|
|
break;
|
|
}
|
|
} else
|
|
alg_mkey = ca_list[j]->algorithm_mkey;
|
|
}
|
|
|
|
if (ca_list[j]->algorithm_auth) {
|
|
if (alg_auth) {
|
|
alg_auth &= ca_list[j]->algorithm_auth;
|
|
if (!alg_auth) {
|
|
found = 0;
|
|
break;
|
|
}
|
|
} else
|
|
alg_auth = ca_list[j]->algorithm_auth;
|
|
}
|
|
|
|
if (ca_list[j]->algorithm_enc) {
|
|
if (alg_enc) {
|
|
alg_enc &= ca_list[j]->algorithm_enc;
|
|
if (!alg_enc) {
|
|
found = 0;
|
|
break;
|
|
}
|
|
} else
|
|
alg_enc = ca_list[j]->algorithm_enc;
|
|
}
|
|
|
|
if (ca_list[j]->algorithm_mac) {
|
|
if (alg_mac) {
|
|
alg_mac &= ca_list[j]->algorithm_mac;
|
|
if (!alg_mac) {
|
|
found = 0;
|
|
break;
|
|
}
|
|
} else
|
|
alg_mac = ca_list[j]->algorithm_mac;
|
|
}
|
|
|
|
if (ca_list[j]->algo_strength & SSL_STRONG_MASK) {
|
|
if (algo_strength & SSL_STRONG_MASK) {
|
|
algo_strength &=
|
|
(ca_list[j]->algo_strength &
|
|
SSL_STRONG_MASK) | ~SSL_STRONG_MASK;
|
|
if (!(algo_strength &
|
|
SSL_STRONG_MASK)) {
|
|
found = 0;
|
|
break;
|
|
}
|
|
} else
|
|
algo_strength |=
|
|
ca_list[j]->algo_strength &
|
|
SSL_STRONG_MASK;
|
|
}
|
|
|
|
if (ca_list[j]->valid) {
|
|
/*
|
|
* explicit ciphersuite found; its protocol
|
|
* version does not become part of the search
|
|
* pattern!
|
|
*/
|
|
cipher_id = ca_list[j]->id;
|
|
if (ca_list[j]->algorithm_ssl == SSL_TLSV1_3)
|
|
*tls13_seen = 1;
|
|
} 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))
|
|
ok = ssl_cipher_strength_sort(head_p, tail_p);
|
|
else
|
|
SSLerrorx(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) {
|
|
if (alg_ssl == SSL_TLSV1_3)
|
|
*tls13_seen = 1;
|
|
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);
|
|
}
|
|
|
|
static inline int
|
|
ssl_aes_is_accelerated(void)
|
|
{
|
|
#if defined(__i386__) || defined(__x86_64__)
|
|
return ((OPENSSL_cpu_caps() & (1ULL << 57)) != 0);
|
|
#else
|
|
return (0);
|
|
#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_tls13,
|
|
const char *rule_str)
|
|
{
|
|
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;
|
|
const char *rule_p;
|
|
CIPHER_ORDER *co_list = NULL, *head = NULL, *tail = NULL, *curr;
|
|
const SSL_CIPHER **ca_list = NULL;
|
|
const SSL_CIPHER *cipher;
|
|
int tls13_seen = 0;
|
|
int any_active;
|
|
int i;
|
|
|
|
/*
|
|
* Return with error if nothing to do.
|
|
*/
|
|
if (rule_str == NULL || cipher_list == NULL)
|
|
return NULL;
|
|
|
|
/*
|
|
* To reduce the work to do we only want to process the compiled
|
|
* in algorithms, so we first get the mask of disabled ciphers.
|
|
*/
|
|
ssl_cipher_get_disabled(&disabled_mkey, &disabled_auth, &disabled_enc, &disabled_mac, &disabled_ssl);
|
|
|
|
/*
|
|
* 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 = reallocarray(NULL, num_of_ciphers, sizeof(CIPHER_ORDER));
|
|
if (co_list == NULL) {
|
|
SSLerrorx(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);
|
|
|
|
if (ssl_aes_is_accelerated()) {
|
|
/*
|
|
* We have hardware assisted AES - prefer AES as a symmetric
|
|
* cipher, with CHACHA20 second.
|
|
*/
|
|
ssl_cipher_apply_rule(0, 0, 0, SSL_AES, 0, 0, 0,
|
|
CIPHER_ADD, -1, &head, &tail);
|
|
ssl_cipher_apply_rule(0, 0, 0, SSL_CHACHA20POLY1305,
|
|
0, 0, 0, CIPHER_ADD, -1, &head, &tail);
|
|
} else {
|
|
/*
|
|
* CHACHA20 is fast and safe on all hardware and is thus our
|
|
* preferred symmetric cipher, with AES second.
|
|
*/
|
|
ssl_cipher_apply_rule(0, 0, 0, SSL_CHACHA20POLY1305,
|
|
0, 0, 0, CIPHER_ADD, -1, &head, &tail);
|
|
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, SSL_kRSA, 0, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
|
|
|
|
/* RC4 is sort of broken - move it to the end */
|
|
ssl_cipher_apply_rule(0, 0, 0, SSL_RC4, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
|
|
|
|
/* Now sort by symmetric encryption strength. The above ordering remains
|
|
* in force within each class */
|
|
if (!ssl_cipher_strength_sort(&head, &tail)) {
|
|
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);
|
|
|
|
/* TLSv1.3 first. */
|
|
ssl_cipher_apply_rule(0, 0, 0, 0, 0, SSL_TLSV1_3, 0, CIPHER_ADD, -1, &head, &tail);
|
|
ssl_cipher_apply_rule(0, 0, 0, 0, 0, SSL_TLSV1_3, 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 = sizeof(cipher_aliases) / sizeof(SSL_CIPHER);
|
|
num_of_alias_max = num_of_ciphers + num_of_group_aliases + 1;
|
|
ca_list = reallocarray(NULL, num_of_alias_max, sizeof(SSL_CIPHER *));
|
|
if (ca_list == NULL) {
|
|
free(co_list);
|
|
SSLerrorx(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, &tls13_seen);
|
|
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,
|
|
&tls13_seen);
|
|
|
|
free((void *)ca_list); /* Not needed anymore */
|
|
|
|
if (!ok) {
|
|
/* Rule processing failure */
|
|
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) {
|
|
free(co_list);
|
|
return (NULL);
|
|
}
|
|
|
|
/* Prefer TLSv1.3 cipher suites. */
|
|
if (cipher_list_tls13 != NULL) {
|
|
for (i = 0; i < sk_SSL_CIPHER_num(cipher_list_tls13); i++) {
|
|
cipher = sk_SSL_CIPHER_value(cipher_list_tls13, i);
|
|
sk_SSL_CIPHER_push(cipherstack, cipher);
|
|
}
|
|
tls13_seen = 1;
|
|
}
|
|
|
|
/*
|
|
* The cipher selection for the list is done. The ciphers are added
|
|
* to the resulting precedence to the STACK_OF(SSL_CIPHER).
|
|
*
|
|
* If the rule string did not contain any references to TLSv1.3 and
|
|
* TLSv1.3 cipher suites have not been configured separately,
|
|
* include inactive TLSv1.3 cipher suites. This avoids attempts to
|
|
* use TLSv1.3 with an older rule string that does not include
|
|
* TLSv1.3 cipher suites. If the rule string resulted in no active
|
|
* cipher suites then we return an empty stack.
|
|
*/
|
|
any_active = 0;
|
|
for (curr = head; curr != NULL; curr = curr->next) {
|
|
if (curr->active ||
|
|
(!tls13_seen && curr->cipher->algorithm_ssl == SSL_TLSV1_3))
|
|
sk_SSL_CIPHER_push(cipherstack, curr->cipher);
|
|
any_active |= curr->active;
|
|
}
|
|
if (!any_active)
|
|
sk_SSL_CIPHER_zero(cipherstack);
|
|
|
|
free(co_list); /* Not needed any longer */
|
|
|
|
sk_SSL_CIPHER_free(*cipher_list);
|
|
*cipher_list = cipherstack;
|
|
|
|
return (cipherstack);
|
|
}
|
|
|
|
const SSL_CIPHER *
|
|
SSL_CIPHER_get_by_id(unsigned int id)
|
|
{
|
|
return ssl3_get_cipher_by_id(id);
|
|
}
|
|
|
|
const SSL_CIPHER *
|
|
SSL_CIPHER_get_by_value(uint16_t value)
|
|
{
|
|
return ssl3_get_cipher_by_value(value);
|
|
}
|
|
|
|
char *
|
|
SSL_CIPHER_description(const SSL_CIPHER *cipher, char *buf, int len)
|
|
{
|
|
unsigned long alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl, alg2;
|
|
const char *ver, *kx, *au, *enc, *mac;
|
|
char *ret;
|
|
int l;
|
|
|
|
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;
|
|
|
|
alg2 = cipher->algorithm2;
|
|
|
|
if (alg_ssl & SSL_SSLV3)
|
|
ver = "SSLv3";
|
|
else if (alg_ssl & SSL_TLSV1_2)
|
|
ver = "TLSv1.2";
|
|
else if (alg_ssl & SSL_TLSV1_3)
|
|
ver = "TLSv1.3";
|
|
else
|
|
ver = "unknown";
|
|
|
|
switch (alg_mkey) {
|
|
case SSL_kRSA:
|
|
kx = "RSA";
|
|
break;
|
|
case SSL_kDHE:
|
|
kx = "DH";
|
|
break;
|
|
case SSL_kECDHE:
|
|
kx = "ECDH";
|
|
break;
|
|
case SSL_kGOST:
|
|
kx = "GOST";
|
|
break;
|
|
case SSL_kTLS1_3:
|
|
kx = "TLSv1.3";
|
|
break;
|
|
default:
|
|
kx = "unknown";
|
|
}
|
|
|
|
switch (alg_auth) {
|
|
case SSL_aRSA:
|
|
au = "RSA";
|
|
break;
|
|
case SSL_aDSS:
|
|
au = "DSS";
|
|
break;
|
|
case SSL_aNULL:
|
|
au = "None";
|
|
break;
|
|
case SSL_aECDSA:
|
|
au = "ECDSA";
|
|
break;
|
|
case SSL_aGOST01:
|
|
au = "GOST01";
|
|
break;
|
|
case SSL_aTLS1_3:
|
|
au = "TLSv1.3";
|
|
break;
|
|
default:
|
|
au = "unknown";
|
|
break;
|
|
}
|
|
|
|
switch (alg_enc) {
|
|
case SSL_3DES:
|
|
enc = "3DES(168)";
|
|
break;
|
|
case SSL_RC4:
|
|
enc = alg2 & SSL2_CF_8_BYTE_ENC ? "RC4(64)" : "RC4(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_CAMELLIA128:
|
|
enc = "Camellia(128)";
|
|
break;
|
|
case SSL_CAMELLIA256:
|
|
enc = "Camellia(256)";
|
|
break;
|
|
case SSL_CHACHA20POLY1305:
|
|
enc = "ChaCha20-Poly1305";
|
|
break;
|
|
case SSL_eGOST2814789CNT:
|
|
enc = "GOST-28178-89-CNT";
|
|
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_GOST94:
|
|
mac = "GOST94";
|
|
break;
|
|
case SSL_GOST89MAC:
|
|
mac = "GOST89IMIT";
|
|
break;
|
|
case SSL_STREEBOG256:
|
|
mac = "STREEBOG256";
|
|
break;
|
|
default:
|
|
mac = "unknown";
|
|
break;
|
|
}
|
|
|
|
if (asprintf(&ret, "%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s\n",
|
|
cipher->name, ver, kx, au, enc, mac) == -1)
|
|
return "OPENSSL_malloc Error";
|
|
|
|
if (buf != NULL) {
|
|
l = strlcpy(buf, ret, len);
|
|
free(ret);
|
|
ret = buf;
|
|
if (l >= len)
|
|
ret = "Buffer too small";
|
|
}
|
|
|
|
return (ret);
|
|
}
|
|
|
|
const char *
|
|
SSL_CIPHER_get_version(const SSL_CIPHER *c)
|
|
{
|
|
if (c == NULL)
|
|
return("(NONE)");
|
|
if ((c->id >> 24) == 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;
|
|
}
|
|
|
|
uint16_t
|
|
SSL_CIPHER_get_value(const SSL_CIPHER *c)
|
|
{
|
|
return ssl3_cipher_get_value(c);
|
|
}
|
|
|
|
int
|
|
SSL_CIPHER_get_cipher_nid(const SSL_CIPHER *c)
|
|
{
|
|
switch (c->algorithm_enc) {
|
|
case SSL_eNULL:
|
|
return NID_undef;
|
|
case SSL_3DES:
|
|
return NID_des_ede3_cbc;
|
|
case SSL_AES128:
|
|
return NID_aes_128_cbc;
|
|
case SSL_AES128GCM:
|
|
return NID_aes_128_gcm;
|
|
case SSL_AES256:
|
|
return NID_aes_256_cbc;
|
|
case SSL_AES256GCM:
|
|
return NID_aes_256_gcm;
|
|
case SSL_CAMELLIA128:
|
|
return NID_camellia_128_cbc;
|
|
case SSL_CAMELLIA256:
|
|
return NID_camellia_256_cbc;
|
|
case SSL_CHACHA20POLY1305:
|
|
return NID_chacha20_poly1305;
|
|
case SSL_DES:
|
|
return NID_des_cbc;
|
|
case SSL_RC4:
|
|
return NID_rc4;
|
|
case SSL_eGOST2814789CNT:
|
|
return NID_gost89_cnt;
|
|
default:
|
|
return NID_undef;
|
|
}
|
|
}
|
|
|
|
int
|
|
SSL_CIPHER_get_digest_nid(const SSL_CIPHER *c)
|
|
{
|
|
switch (c->algorithm_mac) {
|
|
case SSL_AEAD:
|
|
return NID_undef;
|
|
case SSL_GOST89MAC:
|
|
return NID_id_Gost28147_89_MAC;
|
|
case SSL_GOST94:
|
|
return NID_id_GostR3411_94;
|
|
case SSL_MD5:
|
|
return NID_md5;
|
|
case SSL_SHA1:
|
|
return NID_sha1;
|
|
case SSL_SHA256:
|
|
return NID_sha256;
|
|
case SSL_SHA384:
|
|
return NID_sha384;
|
|
case SSL_STREEBOG256:
|
|
return NID_id_tc26_gost3411_2012_256;
|
|
default:
|
|
return NID_undef;
|
|
}
|
|
}
|
|
|
|
int
|
|
SSL_CIPHER_get_kx_nid(const SSL_CIPHER *c)
|
|
{
|
|
switch (c->algorithm_mkey) {
|
|
case SSL_kDHE:
|
|
return NID_kx_dhe;
|
|
case SSL_kECDHE:
|
|
return NID_kx_ecdhe;
|
|
case SSL_kGOST:
|
|
return NID_kx_gost;
|
|
case SSL_kRSA:
|
|
return NID_kx_rsa;
|
|
default:
|
|
return NID_undef;
|
|
}
|
|
}
|
|
|
|
int
|
|
SSL_CIPHER_get_auth_nid(const SSL_CIPHER *c)
|
|
{
|
|
switch (c->algorithm_auth) {
|
|
case SSL_aNULL:
|
|
return NID_auth_null;
|
|
case SSL_aECDSA:
|
|
return NID_auth_ecdsa;
|
|
case SSL_aGOST01:
|
|
return NID_auth_gost01;
|
|
case SSL_aRSA:
|
|
return NID_auth_rsa;
|
|
default:
|
|
return NID_undef;
|
|
}
|
|
}
|
|
|
|
int
|
|
SSL_CIPHER_is_aead(const SSL_CIPHER *c)
|
|
{
|
|
return (c->algorithm_mac & SSL_AEAD) == SSL_AEAD;
|
|
}
|
|
|
|
void *
|
|
SSL_COMP_get_compression_methods(void)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
int
|
|
SSL_COMP_add_compression_method(int id, void *cm)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
const char *
|
|
SSL_COMP_get_name(const void *comp)
|
|
{
|
|
return NULL;
|
|
}
|