libavutil/aes_internal.h

   1 /*
   2  * copyright (c) 2015 rcombs
   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_AES_INTERNAL_H
  22 #define AVUTIL_AES_INTERNAL_H
  23
  24 #include "mem_internal.h"
  25 #include <stdint.h>
  26
  27 typedef union {
  28     uint64_t u64[2];
  29     uint32_t u32[4];
  30     uint8_t u8x4[4][4];
  31     uint8_t u8[16];
  32 } av_aes_block;
  33
  34 typedef struct AVAES {
  35     // Note: round_key[16] is accessed in the init code, but this only
  36     // overwrites state, which does not matter (see also commit ba554c0).
  37     DECLARE_ALIGNED(16, av_aes_block, round_key)[15];
  38     DECLARE_ALIGNED(16, av_aes_block, state)[2];
  39     int rounds;
  40     void (*crypt)(struct AVAES *a, uint8_t *dst, const uint8_t *src, int count, uint8_t *iv, int rounds);
  41 } AVAES;
  42
  43 #endif /* AVUTIL_AES_INTERNAL_H */