/*
 * Copyright (c) 2014 The FreeBSD Foundation
 * Copyright (c) 2018, iXsystems Inc.
 * All rights reserved.
 *
 * This software was developed by Sean Eric Fagan, with lots of references
 * to existing AES-CCM (gmac) code.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1.  Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 * 2.  Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 */

#ifndef _CBC_CCM_H
# define _CBC_CCM_H

# include <sys/types.h>
# include <crypto/rijndael/rijndael.h>

# define CCM_CBC_BLOCK_LEN      16      /* 128 bits */
# define CCM_CBC_MAX_DIGEST_LEN 16
# define CCM_CBC_MIN_DIGEST_LEN 4

/*
 * This is the authentication context structure;
 * the encryption one is similar.
 */
struct aes_cbc_mac_ctx {
        uint8_t         staging_block[CCM_CBC_BLOCK_LEN];
        uint8_t         block[CCM_CBC_BLOCK_LEN];
        int             blockIndex;
        int             nonceLength;    /* This one is in bytes, not bits! */
        const uint8_t   *nonce;
        /* AES state data */
        int             rounds;
        uint32_t        keysched[4*(RIJNDAEL_MAXNR+1)];
};

void AES_CBC_MAC_Init(void *);
void AES_CBC_MAC_Setkey(void *, const uint8_t *, u_int);
void AES_CBC_MAC_Reinit(void *, const uint8_t *, u_int);
int AES_CBC_MAC_Update(void *, const void *, u_int);
void AES_CBC_MAC_Final(uint8_t *, void *);

#endif /* _CBC_CCM_H */