/*
* 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.
*
* $FreeBSD$
*
*/
#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 {
uint64_t authDataLength, authDataCount;
uint64_t cryptDataLength, cryptDataCount;
int blockIndex;
uint8_t staging_block[CCM_CBC_BLOCK_LEN];
uint8_t block[CCM_CBC_BLOCK_LEN];
const uint8_t *nonce;
int nonceLength; /* This one is in bytes, not bits! */
/* AES state data */
int rounds;
uint32_t keysched[4*(RIJNDAEL_MAXNR+1)];
};
void AES_CBC_MAC_Init(struct aes_cbc_mac_ctx *);
void AES_CBC_MAC_Setkey(struct aes_cbc_mac_ctx *, const uint8_t *, uint16_t);
void AES_CBC_MAC_Reinit(struct aes_cbc_mac_ctx *, const uint8_t *, uint16_t);
int AES_CBC_MAC_Update(struct aes_cbc_mac_ctx *, const uint8_t *, uint16_t);
void AES_CBC_MAC_Final(uint8_t *, struct aes_cbc_mac_ctx *);
#endif /* _CBC_CCM_H */
