1 /* $OpenBSD: gmac.h,v 1.1 2010/09/22 11:54:23 mikeb Exp $ */ 2 3 /* 4 * Copyright (c) 2010 Mike Belopuhov <mike@vantronix.net> 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 _GMAC_H_ 20 #define _GMAC_H_ 21 22 #include <crypto/rijndael/rijndael.h> 23 24 #define GMAC_BLOCK_LEN 16 25 #define GMAC_DIGEST_LEN 16 26 27 typedef struct _GHASH_CTX { 28 uint8_t H[GMAC_BLOCK_LEN]; /* hash subkey */ 29 uint8_t S[GMAC_BLOCK_LEN]; /* state */ 30 uint8_t Z[GMAC_BLOCK_LEN]; /* initial state */ 31 } GHASH_CTX; 32 33 typedef struct _AES_GMAC_CTX { 34 GHASH_CTX ghash; 35 uint32_t K[4*(RIJNDAEL_MAXNR + 1)]; 36 uint8_t J[GMAC_BLOCK_LEN]; /* counter block */ 37 int rounds; 38 } AES_GMAC_CTX; 39 40 #include <sys/cdefs.h> 41 42 __BEGIN_DECLS 43 void AES_GMAC_Init(AES_GMAC_CTX *); 44 int AES_GMAC_Setkey(AES_GMAC_CTX *, const uint8_t *, uint16_t); 45 void AES_GMAC_Reinit(AES_GMAC_CTX *, const uint8_t *, uint16_t); 46 int AES_GMAC_Update(AES_GMAC_CTX *, uint8_t *, uint16_t); 47 void AES_GMAC_Final(uint8_t [GMAC_DIGEST_LEN], AES_GMAC_CTX *); 48 __END_DECLS 49 50 #endif /* _GMAC_H_ */ 51 52