1/* $NetBSD: gmac.h,v 1.3 2020/06/29 23:34:48 riastradh Exp $ */ 2/* OpenBSD: gmac.h,v 1.1 2010/09/22 11:54:23 mikeb Exp */ 3 4/* 5 * Copyright (c) 2010 Mike Belopuhov <mike@vantronix.net> 6 * 7 * Permission to use, copy, modify, and distribute this software for any 8 * purpose with or without fee is hereby granted, provided that the above 9 * copyright notice and this permission notice appear in all copies. 10 * 11 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 13 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 14 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 15 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 16 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 17 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 18 */ 19 20#ifndef _GMAC_H_ 21#define _GMAC_H_ 22 23#include <crypto/aes/aes.h> 24 25#define GMAC_BLOCK_LEN 16 26#define GMAC_DIGEST_LEN 16 27 28#ifdef _LP64 29#define GMAC_INT uint64_t 30#define GMAC_INTLEN 8 31#else 32#define GMAC_INT uint32_t 33#define GMAC_INTLEN 4 34#endif 35 36typedef struct _GHASH_CTX { 37 GMAC_INT H[GMAC_BLOCK_LEN/GMAC_INTLEN]; /* hash subkey */ 38 GMAC_INT S[GMAC_BLOCK_LEN/GMAC_INTLEN]; /* state */ 39 GMAC_INT Z[GMAC_BLOCK_LEN/GMAC_INTLEN]; /* initial state */ 40} GHASH_CTX; 41 42typedef struct _AES_GMAC_CTX { 43 GHASH_CTX ghash; 44 struct aesenc K; 45 uint8_t J[GMAC_BLOCK_LEN]; /* counter block */ 46 int rounds; 47} AES_GMAC_CTX; 48 49#include <sys/cdefs.h> 50 51__BEGIN_DECLS 52void AES_GMAC_Init(AES_GMAC_CTX *); 53void AES_GMAC_Setkey(AES_GMAC_CTX *, const uint8_t *, uint16_t); 54void AES_GMAC_Reinit(AES_GMAC_CTX *, const uint8_t *, uint16_t); 55int AES_GMAC_Update(AES_GMAC_CTX *, const uint8_t *, uint16_t); 56void AES_GMAC_Final(uint8_t [GMAC_DIGEST_LEN], AES_GMAC_CTX *); 57__END_DECLS 58 59#endif /* _GMAC_H_ */ 60