1/*	$OpenBSD: cmac.h,v 1.3 2017/05/02 17:07:06 mikeb Exp $	*/
2
3/*-
4 * Copyright (c) 2008 Damien Bergamini <damien.bergamini@free.fr>
5 *
6 * Permission to use, copy, modify, and distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
9 *
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 */
18
19#ifndef _CMAC_H_
20#define _CMAC_H_
21
22#define AES_CMAC_KEY_LENGTH	16
23#define AES_CMAC_DIGEST_LENGTH	16
24
25typedef struct _AES_CMAC_CTX {
26	AES_CTX		aesctx;
27	u_int8_t	X[16];
28	u_int8_t	M_last[16];
29	u_int		M_n;
30} AES_CMAC_CTX;
31
32__BEGIN_DECLS
33void	 AES_CMAC_Init(AES_CMAC_CTX *);
34void	 AES_CMAC_SetKey(AES_CMAC_CTX *, const u_int8_t [AES_CMAC_KEY_LENGTH]);
35void	 AES_CMAC_Update(AES_CMAC_CTX *, const u_int8_t *, u_int)
36		__attribute__((__bounded__(__string__,2,3)));
37void	 AES_CMAC_Final(u_int8_t [AES_CMAC_DIGEST_LENGTH], AES_CMAC_CTX *)
38		__attribute__((__bounded__(__minbytes__,1,AES_CMAC_DIGEST_LENGTH)));
39__END_DECLS
40
41#endif /* _CMAC_H_ */
42