1/*	$NetBSD: aes_ccm.h,v 1.2 2020/07/27 20:44:30 riastradh Exp $	*/
2
3/*-
4 * Copyright (c) 2020 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
19 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
27 */
28
29#ifndef	_CRYPTO_AES_AES_CCM_H
30#define	_CRYPTO_AES_AES_CCM_H
31
32#include <sys/types.h>
33
34struct aesenc;
35
36struct aes_ccm {
37	const struct aesenc	*enc;
38	uint8_t			authctr[32];	/* authenticator and counter */
39	uint8_t			out[16];	/* AES output block */
40	size_t			mlen, mleft;
41	unsigned		i, nr, L, M;
42};
43
44void aes_ccm_init(struct aes_ccm *, unsigned, const struct aesenc *,
45    unsigned, unsigned, const uint8_t *, unsigned, const void *, size_t,
46    size_t);
47void aes_ccm_enc(struct aes_ccm *, const void *, void *, size_t);
48void aes_ccm_dec(struct aes_ccm *, const void *, void *, size_t);
49void aes_ccm_tag(struct aes_ccm *, void *);
50int aes_ccm_verify(struct aes_ccm *, const void *);
51
52int aes_ccm_selftest(void);
53
54#endif	/* _CRYPTO_AES_AES_CCM_H */
55