lib/crypto/aes_cmac_128.h

   1 /*
   2    AES-CMAC-128 (rfc 4493)
   3    Copyright (C) Stefan Metzmacher 2012
   4
   5    This program is free software; you can redistribute it and/or modify
   6    it under the terms of the GNU General Public License as published by
   7    the Free Software Foundation; either version 3 of the License, or
   8    (at your option) any later version.
   9
  10    This program is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17 */
  18
  19 #ifndef LIB_CRYPTO_AES_CMAC_128_H
  20 #define LIB_CRYPTO_AES_CMAC_128_H
  21
  22 struct aes_cmac_128_context {
  23         AES_KEY aes_key;
  24
  25         uint64_t __align;
  26
  27         uint8_t K1[AES_BLOCK_SIZE];
  28         uint8_t K2[AES_BLOCK_SIZE];
  29
  30         uint8_t L[AES_BLOCK_SIZE];
  31         uint8_t X[AES_BLOCK_SIZE];
  32         uint8_t Y[AES_BLOCK_SIZE];
  33
  34         uint8_t tmp[AES_BLOCK_SIZE];
  35
  36         uint8_t last[AES_BLOCK_SIZE];
  37         size_t last_len;
  38 };
  39
  40 void aes_cmac_128_init(struct aes_cmac_128_context *ctx,
  41                        const uint8_t K[AES_BLOCK_SIZE]);
  42 void aes_cmac_128_update(struct aes_cmac_128_context *ctx,
  43                          const uint8_t *_msg, size_t _msg_len);
  44 void aes_cmac_128_final(struct aes_cmac_128_context *ctx,
  45                         uint8_t T[AES_BLOCK_SIZE]);
  46
  47 #endif /* LIB_CRYPTO_AES_CMAC_128_H */