/*
 * sha2.h
 *
 * Version 1.0.0beta1
 *
 * Written by Aaron D. Gifford <me@aarongifford.com>
 *
 * Copyright 2000 Aaron D. Gifford.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the copyright holder nor the names of contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) AND CONTRIBUTOR(S) ``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(S) OR CONTRIBUTOR(S) 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.
 *
 */

/* $RoughId: sha2.h,v 1.3 2002/02/24 08:14:32 knu Exp $ */
/* $Id: sha2.h 11708 2007-02-12 23:01:19Z shyouhei $ */

#ifndef __SHA2_H__
#define __SHA2_H__

#ifdef __cplusplus
extern "C" {
#endif

#include "defs.h"


/*** SHA-256/384/512 Various Length Definitions ***********************/
#define SHA256_BLOCK_LENGTH		64
#define SHA256_DIGEST_LENGTH		32
#define SHA256_DIGEST_STRING_LENGTH	(SHA256_DIGEST_LENGTH * 2 + 1)
#define SHA384_BLOCK_LENGTH		128
#define SHA384_DIGEST_LENGTH		48
#define SHA384_DIGEST_STRING_LENGTH	(SHA384_DIGEST_LENGTH * 2 + 1)
#define SHA512_BLOCK_LENGTH		128
#define SHA512_DIGEST_LENGTH		64
#define SHA512_DIGEST_STRING_LENGTH	(SHA512_DIGEST_LENGTH * 2 + 1)


/*** SHA-256/384/512 Context Structures *******************************/

typedef struct _SHA256_CTX {
	uint32_t	state[8];
	uint64_t	bitcount;
	uint8_t	buffer[SHA256_BLOCK_LENGTH];
} SHA256_CTX;
typedef struct _SHA512_CTX {
	uint64_t	state[8];
	uint64_t	bitcount[2];
	uint8_t	buffer[SHA512_BLOCK_LENGTH];
} SHA512_CTX;

typedef SHA512_CTX SHA384_CTX;


#ifdef RUBY
#define SHA256_Init		rb_Digest_SHA256_Init
#define SHA256_Update		rb_Digest_SHA256_Update
#define SHA256_Finish		rb_Digest_SHA256_Finish

#define SHA384_Init		rb_Digest_SHA384_Init
#define SHA384_Update		rb_Digest_SHA384_Update
#define SHA384_Finish		rb_Digest_SHA384_Finish

#define SHA512_Init		rb_Digest_SHA512_Init
#define SHA512_Update		rb_Digest_SHA512_Update
#define SHA512_Finish		rb_Digest_SHA512_Finish
#endif

/*** SHA-256/384/512 Function Prototypes ******************************/
void SHA256_Init _((SHA256_CTX *));
void SHA256_Update _((SHA256_CTX*, const uint8_t*, size_t));
void SHA256_Finish _((SHA256_CTX*, uint8_t[SHA256_DIGEST_LENGTH]));

void SHA384_Init _((SHA384_CTX*));
void SHA384_Update _((SHA384_CTX*, const uint8_t*, size_t));
void SHA384_Finish _((SHA384_CTX*, uint8_t[SHA384_DIGEST_LENGTH]));

void SHA512_Init _((SHA512_CTX*));
void SHA512_Update _((SHA512_CTX*, const uint8_t*, size_t));
void SHA512_Finish _((SHA512_CTX*, uint8_t[SHA512_DIGEST_LENGTH]));

#ifdef	__cplusplus
}
#endif /* __cplusplus */

#endif /* __SHA2_H__ */