aes.h 1.8 KB

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  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. #ifndef AVUTIL_AES_H
  21. #define AVUTIL_AES_H
  22. #include <stdint.h>
  23. #include "attributes.h"
  24. #include "version.h"
  25. /**
  26. * @defgroup lavu_aes AES
  27. * @ingroup lavu_crypto
  28. * @{
  29. */
  30. extern const int av_aes_size;
  31. struct AVAES;
  32. /**
  33. * Allocate an AVAES context.
  34. */
  35. struct AVAES *av_aes_alloc(void);
  36. /**
  37. * Initialize an AVAES context.
  38. * @param key_bits 128, 192 or 256
  39. * @param decrypt 0 for encryption, 1 for decryption
  40. */
  41. int av_aes_init(struct AVAES *a, const uint8_t *key, int key_bits, int decrypt);
  42. /**
  43. * Encrypt or decrypt a buffer using a previously initialized context.
  44. * @param count number of 16 byte blocks
  45. * @param dst destination array, can be equal to src
  46. * @param src source array, can be equal to dst
  47. * @param iv initialization vector for CBC mode, if NULL then ECB will be used
  48. * @param decrypt 0 for encryption, 1 for decryption
  49. */
  50. void av_aes_crypt(struct AVAES *a, uint8_t *dst, const uint8_t *src, int count, uint8_t *iv, int decrypt);
  51. /**
  52. * @}
  53. */
  54. #endif /* AVUTIL_AES_H */