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/* cmac.h
*
* Copyright (C) 2006-2020 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)
#if defined(HAVE_FIPS) && \
defined(HAVE_FIPS_VERSION) && (HAVE_FIPS_VERSION >= 2)
#include <wolfssl/wolfcrypt/fips.h>
#endif /* HAVE_FIPS_VERSION >= 2 */
#ifdef __cplusplus
extern "C" {
#endif
/* avoid redefinition of structs */
#if !defined(HAVE_FIPS) || \
(defined(HAVE_FIPS_VERSION) && (HAVE_FIPS_VERSION >= 2))
#ifndef WC_CMAC_TYPE_DEFINED
typedef struct Cmac Cmac;
#define WC_CMAC_TYPE_DEFINED
#endif
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;
};
typedef enum CmacType {
WC_CMAC_AES = 1
} CmacType;
#define WC_CMAC_TAG_MAX_SZ AES_BLOCK_SIZE
#define WC_CMAC_TAG_MIN_SZ (AES_BLOCK_SIZE/4)
#endif /* HAVE_FIPS */
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 */
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