sys/opencrypto/gmac.h

   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 void    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