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  1. /*
  2.  * An implementation of the CAMELLIA algorithm as mentioned in RFC3713
  3.  * Copyright (c) 2014 Supraja Meedinti
  4.  *
  5.  * This file is part of FFmpeg.
  6.  *
  7.  * FFmpeg is free software; you can redistribute it and/or
  8.  * modify it under the terms of the GNU Lesser General Public
  9.  * License as published by the Free Software Foundation; either
  10.  * version 2.1 of the License, or (at your option) any later version.
  11.  *
  12.  * FFmpeg is distributed in the hope that it will be useful,
  13.  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15.  * Lesser General Public License for more details.
  16.  *
  17.  * You should have received a copy of the GNU Lesser General Public
  18.  * License along with FFmpeg; if not, write to the Free Software
  19.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  20.  */
  21.  
  22. #ifndef AVUTIL_CAMELLIA_H
  23. #define AVUTIL_CAMELLIA_H
  24.  
  25. #include <stdint.h>
  26.  
  27.  
  28. /**
  29.   * @file
  30.   * @brief Public header for libavutil CAMELLIA algorithm
  31.   * @defgroup lavu_camellia CAMELLIA
  32.   * @ingroup lavu_crypto
  33.   * @{
  34.   */
  35.  
  36. extern const int av_camellia_size;
  37.  
  38. struct AVCAMELLIA;
  39.  
  40. /**
  41.   * Allocate an AVCAMELLIA context
  42.   * To free the struct: av_free(ptr)
  43.   */
  44. struct AVCAMELLIA *av_camellia_alloc(void);
  45.  
  46. /**
  47.   * Initialize an AVCAMELLIA context.
  48.   *
  49.   * @param ctx an AVCAMELLIA context
  50.   * @param key a key of 16, 24, 32 bytes used for encryption/decryption
  51.   * @param key_bits number of keybits: possible are 128, 192, 256
  52.  */
  53. int av_camellia_init(struct AVCAMELLIA *ctx, const uint8_t *key, int key_bits);
  54.  
  55. /**
  56.   * Encrypt or decrypt a buffer using a previously initialized context
  57.   *
  58.   * @param ctx an AVCAMELLIA context
  59.   * @param dst destination array, can be equal to src
  60.   * @param src source array, can be equal to dst
  61.   * @param count number of 16 byte blocks
  62.   * @paran iv initialization vector for CBC mode, NULL for ECB mode
  63.   * @param decrypt 0 for encryption, 1 for decryption
  64.  */
  65. void av_camellia_crypt(struct AVCAMELLIA *ctx, uint8_t *dst, const uint8_t *src, int count, uint8_t* iv, int decrypt);
  66.  
  67. /**
  68.  * @}
  69.  */
  70. #endif /* AVUTIL_CAMELLIA_H */
  71.