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      1 /* $NetBSD: gmac.h,v 1.4 2026/07/05 15:33:44 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 (at) 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 <sys/types.h>
     24 
     25 #include <crypto/aes/aes.h>
     26 
     27 #define GMAC_BLOCK_LEN		16
     28 #define GMAC_DIGEST_LEN		16
     29 
     30 #ifdef _LP64
     31 #define GMAC_INT uint64_t
     32 #define GMAC_INTLEN 8
     33 #else
     34 #define GMAC_INT uint32_t
     35 #define GMAC_INTLEN 4
     36 #endif
     37 
     38 typedef struct _GHASH_CTX {
     39 	GMAC_INT	H[GMAC_BLOCK_LEN/GMAC_INTLEN];	/* hash subkey */
     40 	GMAC_INT	S[GMAC_BLOCK_LEN/GMAC_INTLEN];	/* state */
     41 	GMAC_INT	Z[GMAC_BLOCK_LEN/GMAC_INTLEN];	/* initial state */
     42 } GHASH_CTX;
     43 
     44 typedef struct _AES_GMAC_CTX {
     45 	GHASH_CTX	ghash;
     46 	struct aesenc	K;
     47 	uint8_t		J[GMAC_BLOCK_LEN];		/* counter block */
     48 	int		rounds;
     49 } AES_GMAC_CTX;
     50 
     51 #include <sys/cdefs.h>
     52 
     53 __BEGIN_DECLS
     54 void	AES_GMAC_Init(AES_GMAC_CTX *);
     55 void	AES_GMAC_Setkey(AES_GMAC_CTX *, const uint8_t *, uint16_t);
     56 void	AES_GMAC_Reinit(AES_GMAC_CTX *, const uint8_t *, uint16_t);
     57 int	AES_GMAC_Update(AES_GMAC_CTX *, const uint8_t *, uint16_t);
     58 void	AES_GMAC_Final(uint8_t [GMAC_DIGEST_LEN], AES_GMAC_CTX *);
     59 __END_DECLS
     60 
     61 #endif /* _GMAC_H_ */
     62