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 36 typedef 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 42 typedef 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 52 void AES_GMAC_Init(AES_GMAC_CTX *); 53 void AES_GMAC_Setkey(AES_GMAC_CTX *, const uint8_t *, uint16_t); 54 void AES_GMAC_Reinit(AES_GMAC_CTX *, const uint8_t *, uint16_t); 55 int AES_GMAC_Update(AES_GMAC_CTX *, const uint8_t *, uint16_t); 56 void AES_GMAC_Final(uint8_t [GMAC_DIGEST_LEN], AES_GMAC_CTX *); 57 __END_DECLS 58 59 #endif /* _GMAC_H_ */ 60