/*
* Copyright (C) 2007 Michael Niedermayer <[email protected]>
* Copyright (C) 2013 James Almer <[email protected]>
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/

#ifndef AVUTIL_SHA512_H
#define AVUTIL_SHA512_H

#include <stdint.h>

#include "attributes.h"
#include "version.h"

/**
* @defgroup lavu_sha512 SHA512
* @ingroup lavu_crypto
* @{
*/

extern const int av_sha512_size;

struct AVSHA512;

/**
* Allocate an AVSHA512 context.
*/
struct AVSHA512 *av_sha512_alloc(void);

/**
* Initialize SHA-2 512 hashing.
*
* @param context pointer to the function context (of size av_sha512_size)
* @param bits number of bits in digest (224, 256, 384 or 512 bits)
* @return zero if initialization succeeded, -1 otherwise
*/
int av_sha512_init(struct AVSHA512* context, int bits);

/**
* Update hash value.
*
* @param context hash function context
* @param data input data to update hash with
* @param len input data length
*/
void av_sha512_update(struct AVSHA512* context, const uint8_t* data, unsigned int len);

/**
* Finish hashing and output digest value.
*
* @param context hash function context
* @param digest buffer where output digest value is stored
*/
void av_sha512_final(struct AVSHA512* context, uint8_t *digest);

/**
* @}
*/

#endif /* AVUTIL_SHA512_H */