/*
 * This code implements the CMAC (Cipher-based Message Authentication)
 * algorithm described in FIPS SP800-38B using the AES-128 cipher.
 *
 * Copyright (c) 2017, magnum.
 * Copyright (c) 2008 Damien Bergamini <damien.bergamini@free.fr>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#ifndef JTR_CMAC_H
#define JTR_CMAC_H

#include <stdint.h>

#include "aes.h"

#define AES_CMAC_KEY_LENGTH	16
#define AES_CMAC_DIGEST_LENGTH	16

typedef struct _AES_CMAC_CTX {
	AES_KEY  aesctx;
	uint8_t  X[16];
	uint8_t  M_last[16];
	uint32_t M_n;
} AES_CMAC_CTX;

extern void AES_CMAC_Init(AES_CMAC_CTX *ctx);
extern void AES_CMAC_SetKey(AES_CMAC_CTX *ctx, const uint8_t *key);
extern void AES_CMAC_Update(AES_CMAC_CTX *ctx, const uint8_t *data, uint32_t len);
extern void AES_CMAC_Final(uint8_t *digest, AES_CMAC_CTX *ctx);

#endif /* JTR_CMAC_H */
