Subversion Repositories Kolibri OS

Rev

Blame | Last modification | View Log | RSS feed

  1. /*
  2.  * Copyright (C) 2007 Michael Niedermayer <michaelni@gmx.at>
  3.  *
  4.  * This file is part of FFmpeg.
  5.  *
  6.  * FFmpeg is free software; you can redistribute it and/or
  7.  * modify it under the terms of the GNU Lesser General Public
  8.  * License as published by the Free Software Foundation; either
  9.  * version 2.1 of the License, or (at your option) any later version.
  10.  *
  11.  * FFmpeg is distributed in the hope that it will be useful,
  12.  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14.  * Lesser General Public License for more details.
  15.  *
  16.  * You should have received a copy of the GNU Lesser General Public
  17.  * License along with FFmpeg; if not, write to the Free Software
  18.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  19.  */
  20.  
  21. #ifndef AVUTIL_SHA_H
  22. #define AVUTIL_SHA_H
  23.  
  24. #include <stdint.h>
  25.  
  26. #include "attributes.h"
  27. #include "version.h"
  28.  
  29. /**
  30.  * @defgroup lavu_sha SHA
  31.  * @ingroup lavu_crypto
  32.  * @{
  33.  */
  34.  
  35. extern const int av_sha_size;
  36.  
  37. struct AVSHA;
  38.  
  39. /**
  40.  * Allocate an AVSHA context.
  41.  */
  42. struct AVSHA *av_sha_alloc(void);
  43.  
  44. /**
  45.  * Initialize SHA-1 or SHA-2 hashing.
  46.  *
  47.  * @param context pointer to the function context (of size av_sha_size)
  48.  * @param bits    number of bits in digest (SHA-1 - 160 bits, SHA-2 224 or 256 bits)
  49.  * @return        zero if initialization succeeded, -1 otherwise
  50.  */
  51. int av_sha_init(struct AVSHA* context, int bits);
  52.  
  53. /**
  54.  * Update hash value.
  55.  *
  56.  * @param context hash function context
  57.  * @param data    input data to update hash with
  58.  * @param len     input data length
  59.  */
  60. void av_sha_update(struct AVSHA* context, const uint8_t* data, unsigned int len);
  61.  
  62. /**
  63.  * Finish hashing and output digest value.
  64.  *
  65.  * @param context hash function context
  66.  * @param digest  buffer where output digest value is stored
  67.  */
  68. void av_sha_final(struct AVSHA* context, uint8_t *digest);
  69.  
  70. /**
  71.  * @}
  72.  */
  73.  
  74. #endif /* AVUTIL_SHA_H */
  75.