/*
  * Copyright (C) 2007 Michael Niedermayer <michaelni@gmx.at>
  * Copyright (C) 2013 James Almer <jamrial@gmail.com>
  *
  * 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
  */
 

 /**
  * @file
  * @ingroup lavu_sha512
  * Public header for SHA-512 implementation.
  */
 

 #ifndef AVUTIL_SHA512_H
 #define AVUTIL_SHA512_H
 

 #include <stddef.h>

 #include <stdint.h>
 
 #include "attributes.h"
 #include "version.h"
 
 /**

  * @defgroup lavu_sha512 SHA-512
  * @ingroup lavu_hash
  * SHA-512 (Secure Hash Algorithm) hash function implementations.
  *

  * This module supports the following SHA-2 hash functions:
  *
  * - SHA-512/224: 224 bits
  * - SHA-512/256: 256 bits
  * - SHA-384: 384 bits
  * - SHA-512: 512 bits
  *
  * @see For SHA-1, SHA-256, and variants thereof, see @ref lavu_sha.
  *

  * @{
  */
 
 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
  */

 #if FF_API_CRYPTO_SIZE_T

 void av_sha512_update(struct AVSHA512* context, const uint8_t* data, unsigned int len);

 #else
 void av_sha512_update(struct AVSHA512* context, const uint8_t* data, size_t len);
 #endif

 
 /**
  * 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 */