/*
 * 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 1.2 2001/07/13 19:49:10 knu Exp $ */
/* $Id$ */

#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;


/*** SHA-256/384/512 Function Prototypes ******************************/
void SHA256_Init _((SHA256_CTX *));
void SHA256_Update _((SHA256_CTX*, const uint8_t*, size_t));
void SHA256_Final _((uint8_t[SHA256_DIGEST_LENGTH], SHA256_CTX*));
char* SHA256_End _((SHA256_CTX*, char[SHA256_DIGEST_STRING_LENGTH]));
char* SHA256_Data _((const uint8_t*, size_t, char[SHA256_DIGEST_STRING_LENGTH]));
char *SHA256_File _((char *, char *));
int SHA256_Equal _((SHA256_CTX*, SHA256_CTX*));

void SHA384_Init _((SHA384_CTX*));
void SHA384_Update _((SHA384_CTX*, const uint8_t*, size_t));
void SHA384_Final _((uint8_t[SHA384_DIGEST_LENGTH], SHA384_CTX*));
char* SHA384_End _((SHA384_CTX*, char[SHA384_DIGEST_STRING_LENGTH]));
char* SHA384_Data _((const uint8_t*, size_t, char[SHA384_DIGEST_STRING_LENGTH]));
char *SHA384_File _((char *, char *));
int SHA384_Equal _((SHA384_CTX*, SHA384_CTX*));

void SHA512_Init _((SHA512_CTX*));
void SHA512_Update _((SHA512_CTX*, const uint8_t*, size_t));
void SHA512_Final _((uint8_t[SHA512_DIGEST_LENGTH], SHA512_CTX*));
char* SHA512_End _((SHA512_CTX*, char[SHA512_DIGEST_STRING_LENGTH]));
char* SHA512_Data _((const uint8_t*, size_t, char[SHA512_DIGEST_STRING_LENGTH]));
char *SHA512_File _((char *, char *));
int SHA512_Equal _((SHA512_CTX*, SHA512_CTX*));

#ifdef	__cplusplus
}
#endif /* __cplusplus */

#endif /* __SHA2_H__ */