/* sha256.h */
/*
    This file is part of the Crypto-avr-lib/microcrypt-lib.
    Copyright (C) 2008  Daniel Otte (daniel.otte@rub.de)

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/
/**
 * \file		sha256-asm.h
 * \author		Daniel Otte 
 * \date		2006-05-16
 * \par License	
 * GPL
 * 
 */

#ifndef SHA256_H_
#define SHA256_H_

#define __LITTLE_ENDIAN__


#include <stdint.h>


#define SHA256_HASH_BITS  256
#define SHA256_BLOCK_BITS 512

/**
 * \brief sha256 context type
 * 
 */
typedef struct {
	uint32_t h[8];
	uint64_t length;
} sha256_ctx_t;

typedef uint8_t sha256_hash_t[SHA256_HASH_BITS/8];

void sha256_init(sha256_ctx_t *state);

void sha256_nextBlock (sha256_ctx_t *state, const void* block);
void sha256_lastBlock(sha256_ctx_t *state, const void* block, uint16_t length);

void sha256_ctx2hash(sha256_hash_t *dest, const sha256_ctx_t *state);

/*
 * length in bits!
 */
void sha256(sha256_hash_t *dest, const void* msg, uint32_t length);
uint32_t change_endian32(uint32_t x);


#endif /*SHA256_H_*/