/* $NetBSD: gmac.h,v 1.3 2020/06/29 23:34:48 riastradh Exp $ */
/* OpenBSD: gmac.h,v 1.1 2010/09/22 11:54:23 mikeb Exp */
/*
* Copyright (c) 2010 Mike Belopuhov <
[email protected]>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#ifndef _GMAC_H_
#define _GMAC_H_
#include <crypto/aes/aes.h>
#define GMAC_BLOCK_LEN 16
#define GMAC_DIGEST_LEN 16
#ifdef _LP64
#define GMAC_INT uint64_t
#define GMAC_INTLEN 8
#else
#define GMAC_INT uint32_t
#define GMAC_INTLEN 4
#endif
typedef struct _GHASH_CTX {
GMAC_INT H[GMAC_BLOCK_LEN/GMAC_INTLEN]; /* hash subkey */
GMAC_INT S[GMAC_BLOCK_LEN/GMAC_INTLEN]; /* state */
GMAC_INT Z[GMAC_BLOCK_LEN/GMAC_INTLEN]; /* initial state */
} GHASH_CTX;
typedef struct _AES_GMAC_CTX {
GHASH_CTX ghash;
struct aesenc K;
uint8_t J[GMAC_BLOCK_LEN]; /* counter block */
int rounds;
} AES_GMAC_CTX;
#include <sys/cdefs.h>
__BEGIN_DECLS
void AES_GMAC_Init(AES_GMAC_CTX *);
void AES_GMAC_Setkey(AES_GMAC_CTX *, const uint8_t *, uint16_t);
void AES_GMAC_Reinit(AES_GMAC_CTX *, const uint8_t *, uint16_t);
int AES_GMAC_Update(AES_GMAC_CTX *, const uint8_t *, uint16_t);
void AES_GMAC_Final(uint8_t [GMAC_DIGEST_LEN], AES_GMAC_CTX *);
__END_DECLS
#endif /* _GMAC_H_ */
