/* cmac.h
 *
 * Copyright (C) 2006-2017 wolfSSL Inc.
 *
 * This file is part of wolfSSL.
 *
 * wolfSSL is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * wolfSSL is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
 */


#ifndef WOLF_CRYPT_CMAC_H
# define WOLF_CRYPT_CMAC_H

# include <wolfssl/wolfcrypt/types.h>
# include <wolfssl/wolfcrypt/aes.h>

# if !defined(NO_AES) && defined(WOLFSSL_CMAC)

#  ifdef __cplusplus
extern "C" {
#  endif

typedef struct Cmac {
    Aes    aes;
    byte   buffer[AES_BLOCK_SIZE]; /* partially stored block */
    byte   digest[AES_BLOCK_SIZE]; /* running digest */
    byte   k1[AES_BLOCK_SIZE];
    byte   k2[AES_BLOCK_SIZE];
    word32 bufferSz;
    word32 totalSz;
} Cmac;


typedef enum CmacType {
    WC_CMAC_AES = 1
} CmacType;


WOLFSSL_API
int
wc_InitCmac(Cmac * cmac,
  const byte * key, word32 keySz,
  int type, void * unused);
WOLFSSL_API
int
wc_CmacUpdate(Cmac * cmac,
  const byte * in, word32 inSz);
WOLFSSL_API
int
wc_CmacFinal(Cmac * cmac,
  byte * out, word32 * outSz);

WOLFSSL_API
int
wc_AesCmacGenerate(byte * out, word32 * outSz,
  const byte * in, word32 inSz,
  const byte * key, word32 keySz);

WOLFSSL_API
int
wc_AesCmacVerify(const byte * check, word32 checkSz,
  const byte * in, word32 inSz,
  const byte * key, word32 keySz);

#  ifdef __cplusplus
} /* extern "C" */
#  endif


# endif /* NO_AES && WOLFSSL_CMAC */
#endif  /* WOLF_CRYPT_CMAC_H */
