/*	$PostgreSQL: pgsql/contrib/pgcrypto/sha2.h,v 1.3 2006/05/30 12:56:45 momjian Exp $ */
/*	$OpenBSD: sha2.h,v 1.2 2004/04/28 23:11:57 millert Exp $	*/

/*
 * FILE:	sha2.h
 * AUTHOR:	Aaron D. Gifford <me@aarongifford.com>
 *
 * Copyright (c) 2000-2001, 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 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 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.
 *
 * $From: sha2.h,v 1.1 2001/11/08 00:02:01 adg Exp adg $
 */

#ifndef _SHA2_H
#define _SHA2_H

/* avoid conflict with OpenSSL */
#define SHA256_Init pg_SHA256_Init
#define SHA256_Update pg_SHA256_Update
#define SHA256_Final pg_SHA256_Final
#define SHA384_Init pg_SHA384_Init
#define SHA384_Update pg_SHA384_Update
#define SHA384_Final pg_SHA384_Final
#define SHA512_Init pg_SHA512_Init
#define SHA512_Update pg_SHA512_Update
#define SHA512_Final pg_SHA512_Final

/*** 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		state[8];
	uint64		bitcount;
	uint8		buffer[SHA256_BLOCK_LENGTH];
}	SHA256_CTX;
typedef struct _SHA512_CTX
{
	uint64		state[8];
	uint64		bitcount[2];
	uint8		buffer[SHA512_BLOCK_LENGTH];
}	SHA512_CTX;

typedef SHA512_CTX SHA384_CTX;

void		SHA256_Init(SHA256_CTX *);
void		SHA256_Update(SHA256_CTX *, const uint8 *, size_t);
void		SHA256_Final(uint8[SHA256_DIGEST_LENGTH], SHA256_CTX *);

void		SHA384_Init(SHA384_CTX *);
void		SHA384_Update(SHA384_CTX *, const uint8 *, size_t);
void		SHA384_Final(uint8[SHA384_DIGEST_LENGTH], SHA384_CTX *);

void		SHA512_Init(SHA512_CTX *);
void		SHA512_Update(SHA512_CTX *, const uint8 *, size_t);
void		SHA512_Final(uint8[SHA512_DIGEST_LENGTH], SHA512_CTX *);

#endif   /* _SHA2_H */
