ssl_ciph.c 43.1 KB
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/* ssl/ssl_ciph.c */
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/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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 * All rights reserved.
 *
 * This package is an SSL implementation written
 * by Eric Young (eay@cryptsoft.com).
 * The implementation was written so as to conform with Netscapes SSL.
 * 
 * This library is free for commercial and non-commercial use as long as
 * the following conditions are aheared to.  The following conditions
 * apply to all code found in this distribution, be it the RC4, RSA,
 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
 * included with this distribution is covered by the same copyright terms
 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
 * 
 * Copyright remains Eric Young's, and as such any Copyright notices in
 * the code are not to be removed.
 * If this package is used in a product, Eric Young should be given attribution
 * as the author of the parts of the library used.
 * This can be in the form of a textual message at program startup or
 * in documentation (online or textual) provided with the package.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *    "This product includes cryptographic software written by
 *     Eric Young (eay@cryptsoft.com)"
 *    The word 'cryptographic' can be left out if the rouines from the library
 *    being used are not cryptographic related :-).
 * 4. If you include any Windows specific code (or a derivative thereof) from 
 *    the apps directory (application code) you must include an acknowledgement:
 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
 * 
 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * 
 * The licence and distribution terms for any publically available version or
 * derivative of this code cannot be changed.  i.e. this code cannot simply be
 * copied and put under another distribution licence
 * [including the GNU Public Licence.]
 */
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/* ====================================================================
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 * Copyright (c) 1998-2007 The OpenSSL Project.  All rights reserved.
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 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer. 
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. All advertising materials mentioning features or use of this
 *    software must display the following acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
 *
 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
 *    endorse or promote products derived from this software without
 *    prior written permission. For written permission, please contact
 *    openssl-core@openssl.org.
 *
 * 5. Products derived from this software may not be called "OpenSSL"
 *    nor may "OpenSSL" appear in their names without prior written
 *    permission of the OpenSSL Project.
 *
 * 6. Redistributions of any form whatsoever must retain the following
 *    acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
 *
 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 * ====================================================================
 *
 * This product includes cryptographic software written by Eric Young
 * (eay@cryptsoft.com).  This product includes software written by Tim
 * Hudson (tjh@cryptsoft.com).
 *
 */
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/* ====================================================================
 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
 * ECC cipher suite support in OpenSSL originally developed by 
 * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
 */
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/* ====================================================================
 * Copyright 2005 Nokia. All rights reserved.
 *
 * The portions of the attached software ("Contribution") is developed by
 * Nokia Corporation and is licensed pursuant to the OpenSSL open source
 * license.
 *
 * The Contribution, originally written by Mika Kousa and Pasi Eronen of
 * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
 * support (see RFC 4279) to OpenSSL.
 *
 * No patent licenses or other rights except those expressly stated in
 * the OpenSSL open source license shall be deemed granted or received
 * expressly, by implication, estoppel, or otherwise.
 *
 * No assurances are provided by Nokia that the Contribution does not
 * infringe the patent or other intellectual property rights of any third
 * party or that the license provides you with all the necessary rights
 * to make use of the Contribution.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
 * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
 * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
 * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
 * OTHERWISE.
 */

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#include <stdio.h>
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#include <openssl/objects.h>
#include <openssl/comp.h>
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#include "ssl_locl.h"

#define SSL_ENC_DES_IDX		0
#define SSL_ENC_3DES_IDX	1
#define SSL_ENC_RC4_IDX		2
#define SSL_ENC_RC2_IDX		3
#define SSL_ENC_IDEA_IDX	4
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#define SSL_ENC_NULL_IDX	5
#define SSL_ENC_AES128_IDX	6
#define SSL_ENC_AES256_IDX	7
#define SSL_ENC_CAMELLIA128_IDX	8
#define SSL_ENC_CAMELLIA256_IDX	9
#define SSL_ENC_NUM_IDX		10
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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,
	};

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#define SSL_COMP_NULL_IDX	0
#define SSL_COMP_ZLIB_IDX	1
#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
#define SSL_MD_NUM_IDX	2
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static const EVP_MD *ssl_digest_methods[SSL_MD_NUM_IDX]={
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	NULL,NULL,
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	};

#define CIPHER_ADD	1
#define CIPHER_KILL	2
#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
	{
	SSL_CIPHER *cipher;
	int active;
	int dead;
	struct cipher_order_st *next,*prev;
	} 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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	/* "COMPLEMENTOFDEFAULT" (does *not* include ciphersuites not found in ALL!) */
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	{0,SSL_TXT_CMPDEF,0,  SSL_kEDH|SSL_kEECDH,SSL_aNULL,~SSL_eNULL,0,0,0,0,0,0},
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	/* key exchange aliases
	 * (some of those using only a single bit here combine
	 * multiple key exchange algs according to the RFCs,
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	 * e.g. kEDH combines DHE_DSS and DHE_RSA) */
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	{0,SSL_TXT_kRSA,0,    SSL_kRSA,  0,0,0,0,0,0,0,0},

	{0,SSL_TXT_kDHr,0,    SSL_kDHr,  0,0,0,0,0,0,0,0}, /* no such ciphersuites supported! */
	{0,SSL_TXT_kDHd,0,    SSL_kDHd,  0,0,0,0,0,0,0,0}, /* no such ciphersuites supported! */
	{0,SSL_TXT_kDH,0,     SSL_kDHr|SSL_kDHd,0,0,0,0,0,0,0,0}, /* no such ciphersuites supported! */
	{0,SSL_TXT_kEDH,0,    SSL_kEDH,  0,0,0,0,0,0,0,0},
	{0,SSL_TXT_DH,0,      SSL_kDHr|SSL_kDHd|SSL_kEDH,0,0,0,0,0,0,0,0},

	{0,SSL_TXT_kKRB5,0,   SSL_kKRB5, 0,0,0,0,0,0,0,0},

	{0,SSL_TXT_kECDHr,0,  SSL_kECDHr,0,0,0,0,0,0,0,0},
	{0,SSL_TXT_kECDHe,0,  SSL_kECDHe,0,0,0,0,0,0,0,0},
	{0,SSL_TXT_kECDH,0,   SSL_kECDHr|SSL_kECDHe,0,0,0,0,0,0,0,0},
	{0,SSL_TXT_kEECDH,0,  SSL_kEECDH,0,0,0,0,0,0,0,0},
	{0,SSL_TXT_ECDH,0,    SSL_kECDHr|SSL_kECDHe|SSL_kEECDH,0,0,0,0,0,0,0,0},

        {0,SSL_TXT_kPSK,0,    SSL_kPSK,  0,0,0,0,0,0,0,0},


	/* server authentication aliases */
	{0,SSL_TXT_aRSA,0,    0,SSL_aRSA,  0,0,0,0,0,0,0},
	{0,SSL_TXT_aDSS,0,    0,SSL_aDSS,  0,0,0,0,0,0,0},
	{0,SSL_TXT_DSS,0,     0,SSL_aDSS,   0,0,0,0,0,0,0},
	{0,SSL_TXT_aKRB5,0,   0,SSL_aKRB5, 0,0,0,0,0,0,0},
	{0,SSL_TXT_aNULL,0,   0,SSL_aNULL, 0,0,0,0,0,0,0},
	{0,SSL_TXT_aDH,0,     0,SSL_aDH,   0,0,0,0,0,0,0}, /* no such ciphersuites supported! */
	{0,SSL_TXT_aECDH,0,   0,SSL_aECDH, 0,0,0,0,0,0,0},
	{0,SSL_TXT_aECDSA,0,  0,SSL_aECDSA,0,0,0,0,0,0,0},
	{0,SSL_TXT_ECDSA,0,   0,SSL_aECDSA, 0,0,0,0,0,0,0},
        {0,SSL_TXT_aPSK,0,    0,SSL_aPSK,  0,0,0,0,0,0,0},


	/* aliases combining key exchange and server authentication */
	{0,SSL_TXT_EDH,0,     SSL_kEDH,~SSL_aNULL,0,0,0,0,0,0,0},
	{0,SSL_TXT_EECDH,0,   SSL_kEECDH,~SSL_aNULL,0,0,0,0,0,0,0},
	{0,SSL_TXT_NULL,0,    0,0,SSL_eNULL, 0,0,0,0,0,0},
	{0,SSL_TXT_KRB5,0,    SSL_kKRB5,SSL_aKRB5,0,0,0,0,0,0,0},
	{0,SSL_TXT_RSA,0,     SSL_kRSA,SSL_aRSA,0,0,0,0,0,0,0},
	{0,SSL_TXT_ADH,0,     SSL_kEDH,SSL_aNULL,0,0,0,0,0,0,0},
	{0,SSL_TXT_AECDH,0,   SSL_kEECDH,SSL_aNULL,0,0,0,0,0,0,0},
        {0,SSL_TXT_PSK,0,     SSL_kPSK,SSL_aPSK,0,0,0,0,0,0,0},


	/* symmetric encryption aliases */
	{0,SSL_TXT_DES,0,     0,0,SSL_DES,   0,0,0,0,0,0},
	{0,SSL_TXT_3DES,0,    0,0,SSL_3DES,  0,0,0,0,0,0},
	{0,SSL_TXT_RC4,0,     0,0,SSL_RC4,   0,0,0,0,0,0},
	{0,SSL_TXT_RC2,0,     0,0,SSL_RC2,   0,0,0,0,0,0},
	{0,SSL_TXT_IDEA,0,    0,0,SSL_IDEA,  0,0,0,0,0,0},
	{0,SSL_TXT_eNULL,0,   0,0,SSL_eNULL, 0,0,0,0,0,0},
	{0,SSL_TXT_AES128,0,  0,0,SSL_AES128,0,0,0,0,0,0},
	{0,SSL_TXT_AES256,0,  0,0,SSL_AES256,0,0,0,0,0,0},
	{0,SSL_TXT_AES,0,     0,0,SSL_AES128|SSL_AES256,0,0,0,0,0,0},
	{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},

	/* protocol version aliases */
	{0,SSL_TXT_SSLV2,0,   0,0,0,0,SSL_SSLV2, 0,0,0,0},
	{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},

	/* 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},
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	};

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void ssl_load_ciphers(void)
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	{
	ssl_cipher_methods[SSL_ENC_DES_IDX]= 
		EVP_get_cipherbyname(SN_des_cbc);
	ssl_cipher_methods[SSL_ENC_3DES_IDX]=
		EVP_get_cipherbyname(SN_des_ede3_cbc);
	ssl_cipher_methods[SSL_ENC_RC4_IDX]=
		EVP_get_cipherbyname(SN_rc4);
	ssl_cipher_methods[SSL_ENC_RC2_IDX]= 
		EVP_get_cipherbyname(SN_rc2_cbc);
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#ifndef OPENSSL_NO_IDEA
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	ssl_cipher_methods[SSL_ENC_IDEA_IDX]= 
		EVP_get_cipherbyname(SN_idea_cbc);
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#else
	ssl_cipher_methods[SSL_ENC_IDEA_IDX]= NULL;
#endif
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	ssl_cipher_methods[SSL_ENC_AES128_IDX]=
	  EVP_get_cipherbyname(SN_aes_128_cbc);
	ssl_cipher_methods[SSL_ENC_AES256_IDX]=
	  EVP_get_cipherbyname(SN_aes_256_cbc);
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	ssl_cipher_methods[SSL_ENC_CAMELLIA128_IDX]=
	  EVP_get_cipherbyname(SN_camellia_128_cbc);
	ssl_cipher_methods[SSL_ENC_CAMELLIA256_IDX]=
	  EVP_get_cipherbyname(SN_camellia_256_cbc);
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	ssl_digest_methods[SSL_MD_MD5_IDX]=
		EVP_get_digestbyname(SN_md5);
	ssl_digest_methods[SSL_MD_SHA1_IDX]=
		EVP_get_digestbyname(SN_sha1);
	}

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#ifndef OPENSSL_NO_COMP

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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)
	{
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	int got_write_lock = 0;
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	CRYPTO_r_lock(CRYPTO_LOCK_SSL);
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	if (ssl_comp_methods == NULL)
		{
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		CRYPTO_r_unlock(CRYPTO_LOCK_SSL);
		CRYPTO_w_lock(CRYPTO_LOCK_SSL);
		got_write_lock = 1;
		
		if (ssl_comp_methods == NULL)
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			{
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			SSL_COMP *comp = NULL;

			MemCheck_off();
			ssl_comp_methods=sk_SSL_COMP_new(sk_comp_cmp);
			if (ssl_comp_methods != NULL)
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				{
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				comp=(SSL_COMP *)OPENSSL_malloc(sizeof(SSL_COMP));
				if (comp != NULL)
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					{
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					comp->method=COMP_zlib();
					if (comp->method
						&& comp->method->type == NID_undef)
						OPENSSL_free(comp);
					else
						{
						comp->id=SSL_COMP_ZLIB_IDX;
						comp->name=comp->method->name;
						sk_SSL_COMP_push(ssl_comp_methods,comp);
						}
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					}
				}
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			MemCheck_on();
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			}
		}
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	if (got_write_lock)
		CRYPTO_w_unlock(CRYPTO_LOCK_SSL);
	else
		CRYPTO_r_unlock(CRYPTO_LOCK_SSL);
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	}
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#endif
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int ssl_cipher_get_evp(const SSL_SESSION *s, const EVP_CIPHER **enc,
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	     const EVP_MD **md, SSL_COMP **comp)
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	{
	int i;
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	SSL_CIPHER *c;
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	c=s->cipher;
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	if (c == NULL) return(0);
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	if (comp != NULL)
		{
		SSL_COMP ctmp;
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#ifndef OPENSSL_NO_COMP
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		load_builtin_compressions();
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#endif
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		*comp=NULL;
		ctmp.id=s->compress_meth;
		if (ssl_comp_methods != NULL)
			{
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			i=sk_SSL_COMP_find(ssl_comp_methods,&ctmp);
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			if (i >= 0)
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				*comp=sk_SSL_COMP_value(ssl_comp_methods,i);
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			else
				*comp=NULL;
			}
		}

	if ((enc == NULL) || (md == NULL)) return(0);
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	switch (c->algorithm_enc)
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		{
	case SSL_DES:
		i=SSL_ENC_DES_IDX;
		break;
	case SSL_3DES:
		i=SSL_ENC_3DES_IDX;
		break;
	case SSL_RC4:
		i=SSL_ENC_RC4_IDX;
		break;
	case SSL_RC2:
		i=SSL_ENC_RC2_IDX;
		break;
	case SSL_IDEA:
		i=SSL_ENC_IDEA_IDX;
		break;
	case SSL_eNULL:
		i=SSL_ENC_NULL_IDX;
		break;
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	case SSL_AES128:
		i=SSL_ENC_AES128_IDX;
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		break;
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	case SSL_AES256:
		i=SSL_ENC_AES256_IDX;
		break;
	case SSL_CAMELLIA128:
		i=SSL_ENC_CAMELLIA128_IDX;
		break;
	case SSL_CAMELLIA256:
		i=SSL_ENC_CAMELLIA256_IDX;
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		break;
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	default:
		i= -1;
		break;
		}

	if ((i < 0) || (i > SSL_ENC_NUM_IDX))
		*enc=NULL;
	else
		{
		if (i == SSL_ENC_NULL_IDX)
			*enc=EVP_enc_null();
		else
			*enc=ssl_cipher_methods[i];
		}

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	switch (c->algorithm_mac)
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		{
	case SSL_MD5:
		i=SSL_MD_MD5_IDX;
		break;
	case SSL_SHA1:
		i=SSL_MD_SHA1_IDX;
		break;
	default:
		i= -1;
		break;
		}
	if ((i < 0) || (i > SSL_MD_NUM_IDX))
		*md=NULL;
	else
		*md=ssl_digest_methods[i];

	if ((*enc != NULL) && (*md != NULL))
		return(1);
	else
		return(0);
	}

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#define ITEM_SEP(a) \
	(((a) == ':') || ((a) == ' ') || ((a) == ';') || ((a) == ','))

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static void ll_append_tail(CIPHER_ORDER **head, CIPHER_ORDER *curr,
	     CIPHER_ORDER **tail)
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	{
	if (curr == *tail) return;
	if (curr == *head)
		*head=curr->next;
	if (curr->prev != NULL)
		curr->prev->next=curr->next;
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	if (curr->next != NULL)
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		curr->next->prev=curr->prev;
	(*tail)->next=curr;
	curr->prev= *tail;
	curr->next=NULL;
	*tail=curr;
	}

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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;
	}

503
static void ssl_cipher_get_disabled(unsigned long *mkey, unsigned long *auth, unsigned long *enc, unsigned long *mac, unsigned long *ssl)
504
	{
505 506 507 508 509
	*mkey = 0;
	*auth = 0;
	*enc = 0;
	*mac = 0;
	*ssl = 0;
510

511
#ifdef OPENSSL_NO_RSA
512 513
	*mkey |= SSL_kRSA;
	*auth |= SSL_aRSA;
514
#endif
515
#ifdef OPENSSL_NO_DSA
516
	*auth |= SSL_aDSS;
517
#endif
518 519
	*mkey |= SSL_kDHr|SSL_kDHd; /* no such ciphersuites supported! */
	*auth |= SSL_aDH;
520
#ifdef OPENSSL_NO_DH
521 522
	*mkey |= SSL_kDHr|SSL_kDHd|SSL_kEDH;
	*auth |= SSL_aDH;
523
#endif
524
#ifdef OPENSSL_NO_KRB5
525 526
	*mkey |= SSL_kKRB5;
	*auth |= SSL_aKRB5;
527
#endif
528
#ifdef OPENSSL_NO_ECDSA
529
	*auth |= SSL_aECDSA;
530
#endif
B
Bodo Möller 已提交
531
#ifdef OPENSSL_NO_ECDH
532 533
	*mkey |= SSL_kECDHe|SSL_kECDHr;
	*auth |= SSL_aECDH;
B
Bodo Möller 已提交
534
#endif
535
#ifdef OPENSSL_NO_PSK
536 537
	*mkey |= SSL_kPSK;
	*auth |= SSL_aPSK;
538
#endif
B
Ben Laurie 已提交
539
#ifdef SSL_FORBID_ENULL
540
	*enc |= SSL_eNULL;
541 542
#endif

543 544 545 546 547 548 549 550 551 552 553 554
	*enc |= (ssl_cipher_methods[SSL_ENC_DES_IDX ] == NULL) ? SSL_DES :0;
	*enc |= (ssl_cipher_methods[SSL_ENC_3DES_IDX] == NULL) ? SSL_3DES:0;
	*enc |= (ssl_cipher_methods[SSL_ENC_RC4_IDX ] == NULL) ? SSL_RC4 :0;
	*enc |= (ssl_cipher_methods[SSL_ENC_RC2_IDX ] == NULL) ? SSL_RC2 :0;
	*enc |= (ssl_cipher_methods[SSL_ENC_IDEA_IDX] == NULL) ? SSL_IDEA:0;
	*enc |= (ssl_cipher_methods[SSL_ENC_AES128_IDX] == NULL) ? SSL_AES128:0;
	*enc |= (ssl_cipher_methods[SSL_ENC_AES256_IDX] == NULL) ? SSL_AES256:0;
	*enc |= (ssl_cipher_methods[SSL_ENC_CAMELLIA128_IDX] == NULL) ? SSL_CAMELLIA128:0;
	*enc |= (ssl_cipher_methods[SSL_ENC_CAMELLIA256_IDX] == NULL) ? SSL_CAMELLIA256:0;

	*mac |= (ssl_digest_methods[SSL_MD_MD5_IDX ] == NULL) ? SSL_MD5 :0;
	*mac |= (ssl_digest_methods[SSL_MD_SHA1_IDX] == NULL) ? SSL_SHA1:0;
555 556 557
	}

static void ssl_cipher_collect_ciphers(const SSL_METHOD *ssl_method,
558 559 560 561 562 563
                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)
564
	{
565
	int i, co_list_num;
566 567 568 569 570 571 572 573
	SSL_CIPHER *c;

	/*
	 * We have num_of_ciphers descriptions compiled in, depending on the
	 * method selected (SSLv2 and/or SSLv3, TLSv1 etc).
	 * These will later be sorted in a linked list with at most num
	 * entries.
	 */
574

575
	/* Get the initial list of ciphers */
576
	co_list_num = 0;	/* actual count of ciphers */
577
	for (i = 0; i < num_of_ciphers; i++)
578
		{
579
		c = ssl_method->get_cipher(i);
580
		/* drop those that use any of that is not available */
581 582 583 584 585 586
		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))
587
			{
588 589 590 591 592
			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++;
593
#ifdef KSSL_DEBUG
594
			printf("\t%d: %s %lx %lx %lx\n",i,c->name,c->id,c->algorithm_mkey,c->algorithm_auth);
595
#endif	/* KSSL_DEBUG */
596
			/*
597
			if (!sk_push(ca_list,(char *)c)) goto err;
598
			*/
599 600
			}
		}
601 602 603 604

	/*
	 * Prepare linked list from list entries
	 */	
605
	if (co_list_num > 0)
606
		{
607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625
		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];
626
		}
627
	}
628

629
static void ssl_cipher_collect_aliases(SSL_CIPHER **ca_list,
630 631 632 633
                        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,
634 635 636 637 638
			CIPHER_ORDER *head)
	{
	CIPHER_ORDER *ciph_curr;
	SSL_CIPHER **ca_curr;
	int i;
639 640 641 642 643
	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;
644

645 646 647 648 649 650
	/*
	 * First, add the real ciphers as already collected
	 */
	ciph_curr = head;
	ca_curr = ca_list;
	while (ciph_curr != NULL)
651
		{
652 653 654
		*ca_curr = ciph_curr->cipher;
		ca_curr++;
		ciph_curr = ciph_curr->next;
655 656
		}

657 658
	/*
	 * Now we add the available ones from the cipher_aliases[] table.
659 660
	 * They represent either one or more algorithms, some of which
	 * in any affected category must be supported (set in enabled_mask),
661
	 * or represent a cipher strength value (will be added in any case because algorithms=0).
662 663 664
	 */
	for (i = 0; i < num_of_group_aliases; i++)
		{
665 666 667 668 669 670 671 672 673 674 675 676
		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)
677 678
				continue;
		
679 680
		if (algorithm_enc)
			if ((algorithm_enc & mask_enc) == 0)
681 682
				continue;
		
683 684
		if (algorithm_mac)
			if ((algorithm_mac & mask_mac) == 0)
685 686
				continue;
		
687 688
		if (algorithm_ssl)
			if ((algorithm_ssl & mask_ssl) == 0)
689 690 691 692
				continue;
		
		*ca_curr = (SSL_CIPHER *)(cipher_aliases + i);
		ca_curr++;
693
		}
694

695 696
	*ca_curr = NULL;	/* end of list */
	}
697

698 699 700 701 702
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,
703
		int rule, int strength_bits,
704 705
		CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p)
	{
706
	CIPHER_ORDER *head, *tail, *curr, *curr2, *last;
707
	SSL_CIPHER *cp;
708
	int reverse = 0;
709 710

#ifdef CIPHER_DEBUG
711 712
	printf("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);
713
#endif
714

715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732
	if (rule == CIPHER_DEL)
		reverse = 1; /* needed to maintain sorting between currently deleted ciphers */

	head = *head_p;
	tail = *tail_p;

	if (reverse)
		{
		curr = tail;
		last = head;
		}
	else
		{
		curr = head;
		last = tail;
		}

	curr2 = curr;
733 734
	for (;;)
		{
735
		if ((curr == NULL) || (curr == last)) break;
736
		curr = curr2;
737
		curr2 = reverse ? curr->prev : curr->next;
738 739 740

		cp = curr->cipher;

741 742 743 744 745
		/*
		 * Selection criteria is either the value of strength_bits
		 * or the algorithms used.
		 */
		if (strength_bits >= 0)
746
			{
747
			if (strength_bits != cp->strength_bits)
748 749
				continue;
			}
750
		else
751 752
			{
#ifdef CIPHER_DEBUG
753
			printf("\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);
754
#endif
755 756 757 758 759 760 761 762 763 764 765 766 767 768 769

			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;
770 771 772 773 774 775 776 777 778
			}

#ifdef CIPHER_DEBUG
		printf("Action = %d\n", rule);
#endif

		/* add the cipher if it has not been added yet. */
		if (rule == CIPHER_ADD)
			{
779
			/* reverse == 0 */
780 781 782 783 784 785 786 787 788
			if (!curr->active)
				{
				ll_append_tail(&head, curr, &tail);
				curr->active = 1;
				}
			}
		/* Move the added cipher to this location */
		else if (rule == CIPHER_ORD)
			{
789
			/* reverse == 0 */
790 791 792 793 794 795
			if (curr->active)
				{
				ll_append_tail(&head, curr, &tail);
				}
			}
		else if	(rule == CIPHER_DEL)
796 797 798 799 800 801 802 803 804 805 806
			{
			/* 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;
				}
			}
807 808
		else if (rule == CIPHER_KILL)
			{
809
			/* reverse == 0 */
810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829
			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;
	}

830
static int ssl_cipher_strength_sort(CIPHER_ORDER **head_p,
831
				    CIPHER_ORDER **tail_p)
832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850
	{
	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;
		}

851
	number_uses = OPENSSL_malloc((max_strength_bits + 1) * sizeof(int));
852
	if (!number_uses)
853
		{
854 855
		SSLerr(SSL_F_SSL_CIPHER_STRENGTH_SORT,ERR_R_MALLOC_FAILURE);
		return(0);
856
		}
857 858 859 860 861 862 863 864 865 866 867 868 869 870
	memset(number_uses, 0, (max_strength_bits + 1) * sizeof(int));

	/*
	 * Now find the strength_bits values actually used
	 */
	curr = *head_p;
	while (curr != NULL)
		{
		if (curr->active)
			number_uses[curr->cipher->strength_bits]++;
		curr = curr->next;
		}
	/*
	 * Go through the list of used strength_bits values in descending
871
	 * order.
872 873 874
	 */
	for (i = max_strength_bits; i >= 0; i--)
		if (number_uses[i] > 0)
875
			ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_ORD, i, head_p, tail_p);
876

877
	OPENSSL_free(number_uses);
878 879 880 881
	return(1);
	}

static int ssl_cipher_process_rulestr(const char *rule_str,
882 883
                CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p,
                SSL_CIPHER **ca_list)
884
	{
885
	unsigned long alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl, algo_strength;
886 887
	const char *l, *start, *buf;
	int j, multi, found, rule, retval, ok, buflen;
888
	unsigned long cipher_id = 0;
889
	char ch;
890

891 892 893 894 895
	retval = 1;
	l = rule_str;
	for (;;)
		{
		ch = *l;
896

897 898
		if (ch == '\0')
			break;		/* done */
899
		if (ch == '-')
900
			{ rule = CIPHER_DEL; l++; }
901
		else if (ch == '+')
902
			{ rule = CIPHER_ORD; l++; }
903
		else if (ch == '!')
904 905 906 907 908
			{ rule = CIPHER_KILL; l++; }
		else if (ch == '@')
			{ rule = CIPHER_SPECIAL; l++; }
		else
			{ rule = CIPHER_ADD; }
909

910
		if (ITEM_SEP(ch))
911 912 913 914
			{
			l++;
			continue;
			}
915

916 917 918 919 920 921
		alg_mkey = 0;
		alg_auth = 0;
		alg_enc = 0;
		alg_mac = 0;
		alg_ssl = 0;
		algo_strength = 0;
922 923 924 925

		start=l;
		for (;;)
			{
926 927 928
			ch = *l;
			buf = l;
			buflen = 0;
929
#ifndef CHARSET_EBCDIC
930 931 932 933
			while (	((ch >= 'A') && (ch <= 'Z')) ||
				((ch >= '0') && (ch <= '9')) ||
				((ch >= 'a') && (ch <= 'z')) ||
				 (ch == '-'))
934 935 936
#else
			while (	isalnum(ch) || (ch == '-'))
#endif
937
				 {
938 939
				 ch = *(++l);
				 buflen++;
940
				 }
941 942 943 944

			if (buflen == 0)
				{
				/*
945
				 * We hit something we cannot deal with,
U
Ulf Möller 已提交
946
				 * it is no command or separator nor
947 948 949 950 951 952 953 954 955 956 957
				 * 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)
				{
958
				found = 0; /* unused -- avoid compiler warning */
959 960
				break;	/* special treatment */
				}
961 962

			/* check for multi-part specification */
963 964 965 966 967 968 969
			if (ch == '+')
				{
				multi=1;
				l++;
				}
			else
				multi=0;
970

971
			/*
972
			 * Now search for the cipher alias in the ca_list. Be careful
973 974 975
			 * 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.
976 977
			 * So additionally check whether the cipher name found
			 * has the correct length. We can save a strlen() call:
978
			 * just checking for the '\0' at the right place is
979 980
			 * sufficient, we have to strncmp() anyway. (We cannot
			 * use strcmp(), because buf is not '\0' terminated.)
981
			 */
982 983 984
			j = found = 0;
			cipher_id = 0;
			while (ca_list[j])
985
				{
986 987
				if (!strncmp(buf, ca_list[j]->name, buflen) &&
				    (ca_list[j]->name[buflen] == '\0'))
988 989 990 991 992 993 994
					{
					found = 1;
					break;
					}
				else
					j++;
				}
995

996 997 998
			if (!found)
				break;	/* ignore this entry */

999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064
			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;
				}
			
1065 1066
			if (ca_list[j]->valid)
				{
1067 1068 1069
				/* explicit ciphersuite found; its protocol version
				 * does not become part of the search pattern!*/

1070 1071
				cipher_id = ca_list[j]->id;
				}
1072 1073 1074 1075
			else
				{
				/* not an explicit ciphersuite; only in this case, the
				 * protocol version is considered part of the search pattern */
1076

1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088
				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;
					}
				}
			
1089 1090
			if (!multi) break;
			}
1091

1092 1093 1094 1095 1096 1097 1098 1099
		/*
		 * Ok, we have the rule, now apply it
		 */
		if (rule == CIPHER_SPECIAL)
			{	/* special command */
			ok = 0;
			if ((buflen == 8) &&
				!strncmp(buf, "STRENGTH", 8))
1100
				ok = ssl_cipher_strength_sort(head_p, tail_p);
1101 1102 1103 1104 1105
			else
				SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR,
					SSL_R_INVALID_COMMAND);
			if (ok == 0)
				retval = 0;
1106
			/*
1107 1108 1109 1110
			 * 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.
1111
			 */
1112
			while ((*l != '\0') && !ITEM_SEP(*l))
1113 1114 1115 1116
				l++;
			}
		else if (found)
			{
1117 1118 1119
			ssl_cipher_apply_rule(cipher_id,
				alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl, algo_strength,
				rule, -1, head_p, tail_p);
1120 1121 1122
			}
		else
			{
1123
			while ((*l != '\0') && !ITEM_SEP(*l))
1124 1125 1126
				l++;
			}
		if (*l == '\0') break; /* done */
1127 1128
		}

1129 1130 1131 1132 1133 1134 1135 1136 1137
	return(retval);
	}

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)
	{
	int ok, num_of_ciphers, num_of_alias_max, num_of_group_aliases;
1138
	unsigned long disabled_mkey, disabled_auth, disabled_enc, disabled_mac, disabled_ssl;
1139
	STACK_OF(SSL_CIPHER) *cipherstack, *tmp_cipher_list;
1140
	const char *rule_p;
1141
	CIPHER_ORDER *co_list = NULL, *head = NULL, *tail = NULL, *curr;
1142 1143 1144 1145 1146
	SSL_CIPHER **ca_list = NULL;

	/*
	 * Return with error if nothing to do.
	 */
1147 1148
	if (rule_str == NULL || cipher_list == NULL || cipher_list_by_id == NULL)
		return NULL;
1149 1150 1151 1152 1153

	/*
	 * To reduce the work to do we only want to process the compiled
	 * in algorithms, so we first get the mask of disabled ciphers.
	 */
1154
	ssl_cipher_get_disabled(&disabled_mkey, &disabled_auth, &disabled_enc, &disabled_mac, &disabled_ssl);
1155 1156 1157 1158 1159 1160 1161

	/*
	 * 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();
1162 1163 1164
#ifdef KSSL_DEBUG
	printf("ssl_create_cipher_list() for %d ciphers\n", num_of_ciphers);
#endif    /* KSSL_DEBUG */
1165 1166
	co_list = (CIPHER_ORDER *)OPENSSL_malloc(sizeof(CIPHER_ORDER) * num_of_ciphers);
	if (co_list == NULL)
1167
		{
1168 1169 1170
		SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
		return(NULL);	/* Failure */
		}
1171

1172 1173 1174
	ssl_cipher_collect_ciphers(ssl_method, num_of_ciphers,
	                           disabled_mkey, disabled_auth, disabled_enc, disabled_mac, disabled_ssl,
	                           co_list, &head, &tail);
1175

1176 1177 1178

	/* Now arrange all ciphers by preference: */

1179 1180 1181 1182 1183
	/* Everything else being equal, prefer ephemeral ECDH over other key exchange mechanisms */
	ssl_cipher_apply_rule(0, SSL_kEECDH, 0, 0, 0, 0, 0, CIPHER_ADD, -1, &head, &tail);
	ssl_cipher_apply_rule(0, SSL_kEECDH, 0, 0, 0, 0, 0, CIPHER_DEL, -1, &head, &tail);

	/* Temporarily enable AES first (preferred cipher) */
1184 1185 1186 1187 1188 1189 1190 1191 1192 1193
	ssl_cipher_apply_rule(0, 0, 0, SSL_AES, 0, 0, 0, CIPHER_ADD, -1, &head, &tail);

	/* Temporarily enable everything else */
	ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_ADD, -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);

1194
	/* Move ciphers without forward secrecy to the end */
1195
	ssl_cipher_apply_rule(0, 0, SSL_aECDH, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1196
	/* ssl_cipher_apply_rule(0, 0, SSL_aDH, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail); */
1197
	ssl_cipher_apply_rule(0, SSL_kRSA, 0, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1198
	ssl_cipher_apply_rule(0, SSL_kPSK, 0,0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1199
	ssl_cipher_apply_rule(0, SSL_kKRB5, 0,0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215

	/* 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);


1216 1217 1218 1219 1220
	/*
	 * 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
U
Ulf Möller 已提交
1221
	 * groups of cipher_aliases added together in one list (otherwise
1222 1223 1224 1225 1226
	 * 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 =
1227
		(SSL_CIPHER **)OPENSSL_malloc(sizeof(SSL_CIPHER *) * num_of_alias_max);
1228 1229
	if (ca_list == NULL)
		{
1230
		OPENSSL_free(co_list);
1231 1232 1233
		SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
		return(NULL);	/* Failure */
		}
1234 1235 1236
	ssl_cipher_collect_aliases(ca_list, num_of_group_aliases,
	                           disabled_mkey, disabled_auth, disabled_enc, disabled_mac, disabled_ssl,
	                           head);
1237 1238 1239 1240 1241 1242 1243 1244 1245 1246

	/*
	 * 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,
1247
			&head, &tail, ca_list);
1248 1249 1250 1251
		rule_p += 7;
		if (*rule_p == ':')
			rule_p++;
		}
1252

1253
	if (ok && (strlen(rule_p) > 0))
1254
		ok = ssl_cipher_process_rulestr(rule_p, &head, &tail, ca_list);
1255

1256
	OPENSSL_free(ca_list);	/* Not needed anymore */
1257 1258 1259

	if (!ok)
		{	/* Rule processing failure */
1260
		OPENSSL_free(co_list);
1261 1262
		return(NULL);
		}
1263
	
1264 1265 1266 1267
	/*
	 * Allocate new "cipherstack" for the result, return with error
	 * if we cannot get one.
	 */
1268
	if ((cipherstack = sk_SSL_CIPHER_new_null()) == NULL)
1269
		{
1270
		OPENSSL_free(co_list);
1271
		return(NULL);
1272 1273
		}

1274 1275 1276 1277 1278
	/*
	 * 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)
1279
		{
1280
		if (curr->active)
1281
			{
1282
			sk_SSL_CIPHER_push(cipherstack, curr->cipher);
1283
#ifdef CIPHER_DEBUG
1284
			printf("<%s>\n",curr->cipher->name);
1285 1286 1287
#endif
			}
		}
1288
	OPENSSL_free(co_list);	/* Not needed any longer */
1289

1290 1291
	tmp_cipher_list = sk_SSL_CIPHER_dup(cipherstack);
	if (tmp_cipher_list == NULL)
1292 1293
		{
		sk_SSL_CIPHER_free(cipherstack);
1294
		return NULL;
1295
		}
1296 1297 1298 1299 1300 1301
	if (*cipher_list != 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;
B
Ben Laurie 已提交
1302
	sk_SSL_CIPHER_set_cmp_func(*cipher_list_by_id,ssl_cipher_ptr_id_cmp);
1303

1304
	return(cipherstack);
1305 1306
	}

U
Ulf Möller 已提交
1307
char *SSL_CIPHER_description(SSL_CIPHER *cipher, char *buf, int len)
1308
	{
1309
	int is_export,pkl,kl;
N
Nils Larsch 已提交
1310 1311
	const char *ver,*exp_str;
	const char *kx,*au,*enc,*mac;
1312
	unsigned long alg_mkey,alg_auth,alg_enc,alg_mac,alg_ssl,alg2,alg_s;
1313
#ifdef KSSL_DEBUG
1314
	static const char *format="%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s%s AL=%lx/%lx/%lx/%lx/%lx\n";
1315
#else
N
Nils Larsch 已提交
1316
	static const char *format="%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s%s\n";
1317 1318
#endif /* KSSL_DEBUG */

1319 1320 1321 1322 1323 1324
	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;

1325
	alg_s=cipher->algo_strength;
1326 1327
	alg2=cipher->algorithm2;

1328 1329 1330
	is_export=SSL_C_IS_EXPORT(cipher);
	pkl=SSL_C_EXPORT_PKEYLENGTH(cipher);
	kl=SSL_C_EXPORT_KEYLENGTH(cipher);
G
Geoff Thorpe 已提交
1331
	exp_str=is_export?" export":"";
B
Bodo Möller 已提交
1332
	
1333
	if (alg_ssl & SSL_SSLV2)
1334
		ver="SSLv2";
1335
	else if (alg_ssl & SSL_SSLV3)
1336 1337 1338 1339
		ver="SSLv3";
	else
		ver="unknown";

1340
	switch (alg_mkey)
1341 1342
		{
	case SSL_kRSA:
1343
		kx=is_export?(pkl == 512 ? "RSA(512)" : "RSA(1024)"):"RSA";
1344 1345 1346 1347 1348 1349 1350
		break;
	case SSL_kDHr:
		kx="DH/RSA";
		break;
	case SSL_kDHd:
		kx="DH/DSS";
		break;
1351 1352
        case SSL_kKRB5:
		kx="KRB5";
1353 1354
		break;
	case SSL_kEDH:
1355
		kx=is_export?(pkl == 512 ? "DH(512)" : "DH(1024)"):"DH";
1356
		break;
1357 1358 1359 1360 1361 1362 1363 1364
	case SSL_kECDHr:
		kx="ECDH/RSA";
		break;
	case SSL_kECDHe:
		kx="ECDH/ECDSA";
		break;
	case SSL_kEECDH:
		kx="ECDH";
B
Bodo Möller 已提交
1365
		break;
1366 1367 1368
	case SSL_kPSK:
		kx="PSK";
		break;
1369 1370 1371 1372
	default:
		kx="unknown";
		}

1373
	switch (alg_auth)
1374 1375 1376 1377 1378 1379 1380 1381 1382 1383
		{
	case SSL_aRSA:
		au="RSA";
		break;
	case SSL_aDSS:
		au="DSS";
		break;
	case SSL_aDH:
		au="DH";
		break;
1384 1385 1386 1387 1388 1389
        case SSL_aKRB5:
		au="KRB5";
		break;
        case SSL_aECDH:
		au="ECDH";
		break;
1390 1391 1392
	case SSL_aNULL:
		au="None";
		break;
B
Bodo Möller 已提交
1393 1394 1395
	case SSL_aECDSA:
		au="ECDSA";
		break;
1396 1397 1398
	case SSL_aPSK:
		au="PSK";
		break;
1399 1400 1401 1402 1403
	default:
		au="unknown";
		break;
		}

1404
	switch (alg_enc)
1405 1406
		{
	case SSL_DES:
1407
		enc=(is_export && kl == 5)?"DES(40)":"DES(56)";
1408 1409 1410 1411 1412
		break;
	case SSL_3DES:
		enc="3DES(168)";
		break;
	case SSL_RC4:
1413
		enc=is_export?(kl == 5 ? "RC4(40)" : "RC4(56)")
1414
		  :((alg2&SSL2_CF_8_BYTE_ENC)?"RC4(64)":"RC4(128)");
1415 1416
		break;
	case SSL_RC2:
1417
		enc=is_export?(kl == 5 ? "RC2(40)" : "RC2(56)"):"RC2(128)";
1418 1419 1420 1421 1422 1423 1424
		break;
	case SSL_IDEA:
		enc="IDEA(128)";
		break;
	case SSL_eNULL:
		enc="None";
		break;
1425 1426
	case SSL_AES128:
		enc="AES(128)";
1427
		break;
1428 1429 1430 1431 1432 1433 1434 1435
	case SSL_AES256:
		enc="AES(256)";
		break;
	case SSL_CAMELLIA128:
		enc="Camellia(128)";
		break;
	case SSL_CAMELLIA256:
		enc="Camellia(256)";
1436
		break;
1437 1438 1439 1440 1441
	default:
		enc="unknown";
		break;
		}

1442
	switch (alg_mac)
1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456
		{
	case SSL_MD5:
		mac="MD5";
		break;
	case SSL_SHA1:
		mac="SHA1";
		break;
	default:
		mac="unknown";
		break;
		}

	if (buf == NULL)
		{
B
Bodo Möller 已提交
1457
		len=128;
1458 1459
		buf=OPENSSL_malloc(len);
		if (buf == NULL) return("OPENSSL_malloc Error");
1460 1461 1462 1463
		}
	else if (len < 128)
		return("Buffer too small");

1464
#ifdef KSSL_DEBUG
1465
	BIO_snprintf(buf,len,format,cipher->name,ver,kx,au,enc,mac,exp_str,alg_mkey,alg_auth,alg_enc,alg_mac,alg_ssl);
1466
#else
G
Geoff Thorpe 已提交
1467
	BIO_snprintf(buf,len,format,cipher->name,ver,kx,au,enc,mac,exp_str);
1468
#endif /* KSSL_DEBUG */
1469 1470 1471
	return(buf);
	}

B
Ben Laurie 已提交
1472
char *SSL_CIPHER_get_version(const SSL_CIPHER *c)
1473 1474 1475
	{
	int i;

1476
	if (c == NULL) return("(NONE)");
1477 1478
	i=(int)(c->id>>24L);
	if (i == 3)
1479
		return("TLSv1/SSLv3");
1480 1481 1482 1483 1484 1485 1486
	else if (i == 2)
		return("SSLv2");
	else
		return("unknown");
	}

/* return the actual cipher being used */
B
Ben Laurie 已提交
1487
const char *SSL_CIPHER_get_name(const SSL_CIPHER *c)
1488 1489 1490 1491 1492 1493
	{
	if (c != NULL)
		return(c->name);
	return("(NONE)");
	}

U
Ulf Möller 已提交
1494
/* number of bits for symmetric cipher */
B
Ben Laurie 已提交
1495
int SSL_CIPHER_get_bits(const SSL_CIPHER *c, int *alg_bits)
1496
	{
1497
	int ret=0;
1498 1499 1500

	if (c != NULL)
		{
1501 1502
		if (alg_bits != NULL) *alg_bits = c->alg_bits;
		ret = c->strength_bits;
1503 1504 1505 1506
		}
	return(ret);
	}

U
Ulf Möller 已提交
1507
SSL_COMP *ssl3_comp_find(STACK_OF(SSL_COMP) *sk, int n)
1508 1509 1510 1511 1512
	{
	SSL_COMP *ctmp;
	int i,nn;

	if ((n == 0) || (sk == NULL)) return(NULL);
B
Ben Laurie 已提交
1513
	nn=sk_SSL_COMP_num(sk);
1514 1515
	for (i=0; i<nn; i++)
		{
B
Ben Laurie 已提交
1516
		ctmp=sk_SSL_COMP_value(sk,i);
1517 1518 1519 1520 1521 1522
		if (ctmp->id == n)
			return(ctmp);
		}
	return(NULL);
	}

1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537
#ifdef OPENSSL_NO_COMP
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;
	}
#else
U
Ulf Möller 已提交
1538
STACK_OF(SSL_COMP) *SSL_COMP_get_compression_methods(void)
1539
	{
1540
	load_builtin_compressions();
1541 1542 1543
	return(ssl_comp_methods);
	}

U
Ulf Möller 已提交
1544
int SSL_COMP_add_compression_method(int id, COMP_METHOD *cm)
1545 1546 1547
	{
	SSL_COMP *comp;

1548 1549 1550
        if (cm == NULL || cm->type == NID_undef)
                return 1;

1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562
	/* 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;
		}

1563
	MemCheck_off();
1564
	comp=(SSL_COMP *)OPENSSL_malloc(sizeof(SSL_COMP));
1565 1566
	comp->id=id;
	comp->method=cm;
1567
	load_builtin_compressions();
1568 1569 1570 1571 1572 1573 1574 1575 1576
	if (ssl_comp_methods
		&& !sk_SSL_COMP_find(ssl_comp_methods,comp))
		{
		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)
1577
		|| !sk_SSL_COMP_push(ssl_comp_methods,comp))
1578
		{
1579
		OPENSSL_free(comp);
1580
		MemCheck_on();
1581
		SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,ERR_R_MALLOC_FAILURE);
R
Richard Levitte 已提交
1582
		return(1);
1583 1584
		}
	else
1585 1586
		{
		MemCheck_on();
R
Richard Levitte 已提交
1587
		return(0);
1588
		}
1589
	}
1590 1591 1592 1593 1594 1595 1596 1597

const char *SSL_COMP_get_name(const COMP_METHOD *comp)
	{
	if (comp)
		return comp->name;
	return NULL;
	}

1598
#endif