[apple/security.git] / OSX / include / security_cryptkit / HmacSha1Legacy.c

/*
 * Copyright (c) 2000-2001,2011-2014 Apple Inc. All Rights Reserved.
 * 
 * The contents of this file constitute Original Code as defined in and are
 * subject to the Apple Public Source License Version 1.2 (the 'License').
 * You may not use this file except in compliance with the License. Please obtain
 * a copy of the License at http://www.apple.com/publicsource and read it before
 * using this file.
 * 
 * This Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS
 * OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, INCLUDING WITHOUT
 * LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
 * PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. Please see the License for the
 * specific language governing rights and limitations under the License.
 */


/*
 	File:		HmacSha1Legacy.c
 	Contains:	HMAC/SHA1, bug-for-bug compatible with BSAFE 4.0.
 	Copyright (c) 2001,2011-2014 Apple Inc. All Rights Reserved.
*/

#include "ckconfig.h"

#if	CRYPTKIT_HMAC_LEGACY

#include "HmacSha1Legacy.h"
#include "ckSHA1.h"
#include <string.h>
#include <stdlib.h>
#include <Security/SecBase.h>
#define kHMACSHA1DigestSize  20

/* XXX These should really be in ckSHA1.h */
#define kSHA1DigestSize  	20
#define kSHA1BlockSize  	64

/*
 * bug-for-bug compatible with BSAFE 4.0. See
 * BSafe/bsource/algs/ahchhmac.c.
 *
 * This implementation, and the BSAFE implementation it emulates, work fine 
 * when calculating a MAC in a single update (init, update, final). They 
 * generate nonconforming MACs when performing multiple updates because 
 * the entire algorithm - both inner and outer digests - are performed 
 * in the update() step. As a result, if one e.g. calculates a MAC of 
 * a block of text with one update, and then calculates the MAC over the
Commit	Line	Data
b1ab9ed8	1	/*
d8f41ccd	2	* Copyright (c) 2000-2001,2011-2014 Apple Inc. All Rights Reserved.
b1ab9ed8 A	3	*
	4	* The contents of this file constitute Original Code as defined in and are
	5	* subject to the Apple Public Source License Version 1.2 (the 'License').
	6	* You may not use this file except in compliance with the License. Please obtain
	7	* a copy of the License at http://www.apple.com/publicsource and read it before
	8	* using this file.
	9	*
	10	* This Original Code and all software distributed under the License are
	11	* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS
	12	* OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, INCLUDING WITHOUT
	13	* LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
	14	* PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. Please see the License for the
	15	* specific language governing rights and limitations under the License.
	16	*/
	17
	18
	19	/*
	20	File: HmacSha1Legacy.c
	21	Contains: HMAC/SHA1, bug-for-bug compatible with BSAFE 4.0.
d8f41ccd	22	Copyright (c) 2001,2011-2014 Apple Inc. All Rights Reserved.
b1ab9ed8 A	23	*/
	24
	25	#include "ckconfig.h"
	26
	27	#if CRYPTKIT_HMAC_LEGACY
	28
	29	#include "HmacSha1Legacy.h"
	30	#include "ckSHA1.h"
	31	#include <string.h>
	32	#include <stdlib.h>
427c49bc	33	#include <Security/SecBase.h>
b1ab9ed8 A	34	#define kHMACSHA1DigestSize 20
	35
	36	/* XXX These should really be in ckSHA1.h */
	37	#define kSHA1DigestSize 20
	38	#define kSHA1BlockSize 64
	39
	40	/*
	41	* bug-for-bug compatible with BSAFE 4.0. See
	42	* BSafe/bsource/algs/ahchhmac.c.
	43	*
	44	* This implementation, and the BSAFE implementation it emulates, work fine
	45	* when calculating a MAC in a single update (init, update, final). They
	46	* generate nonconforming MACs when performing multiple updates because
	47	* the entire algorithm - both inner and outer digests - are performed
	48	* in the update() step. As a result, if one e.g. calculates a MAC of
	49	* a block of text with one update, and then calculates the MAC over the
	50