1/*
2 * Copyright (c) 2014 The FreeBSD Foundation
3 * Copyright (c) 2018, iXsystems Inc.
4 * All rights reserved.
5 *
6 * This software was developed by Sean Eric Fagan, with lots of references
7 * to existing AES-CCM (gmac) code.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1.  Redistributions of source code must retain the above copyright
13 *     notice, this list of conditions and the following disclaimer.
14 * 2.  Redistributions in binary form must reproduce the above copyright
15 *     notice, this list of conditions and the following disclaimer in the
16 *     documentation and/or other materials provided with the distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 *
30 */
31
32#ifndef _CBC_CCM_H
33# define _CBC_CCM_H
34
35# include <sys/types.h>
36# include <crypto/rijndael/rijndael.h>
37
38# define CCM_CBC_BLOCK_LEN	16	/* 128 bits */
39# define CCM_CBC_MAX_DIGEST_LEN	16
40# define CCM_CBC_MIN_DIGEST_LEN	4
41
42/*
43 * This is the authentication context structure;
44 * the encryption one is similar.
45 */
46struct aes_cbc_mac_ctx {
47	uint8_t		staging_block[CCM_CBC_BLOCK_LEN];
48	uint8_t		block[CCM_CBC_BLOCK_LEN];
49	int		blockIndex;
50	int		nonceLength;	/* This one is in bytes, not bits! */
51	const uint8_t	*nonce;
52	/* AES state data */
53	int		rounds;
54	uint32_t	keysched[4*(RIJNDAEL_MAXNR+1)];
55};
56
57void AES_CBC_MAC_Init(void *);
58void AES_CBC_MAC_Setkey(void *, const uint8_t *, u_int);
59void AES_CBC_MAC_Reinit(void *, const uint8_t *, u_int);
60int AES_CBC_MAC_Update(void *, const void *, u_int);
61void AES_CBC_MAC_Final(uint8_t *, void *);
62
63#endif /* _CBC_CCM_H */
64