1 /*- 2 * Copyright (c) 2014 The FreeBSD Foundation 3 * All rights reserved. 4 * 5 * This software was developed by John-Mark Gurney under 6 * the sponsorship of the FreeBSD Foundation and 7 * Rubicon Communications, LLC (Netgate). 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * $FreeBSD$ 30 * 31 */ 32 33 #ifndef _GMAC_H_ 34 #define _GMAC_H_ 35 36 #include "gfmult.h" 37 #include <crypto/rijndael/rijndael.h> 38 39 #define GMAC_BLOCK_LEN 16 40 #define GMAC_DIGEST_LEN 16 41 42 struct aes_gmac_ctx { 43 struct gf128table4 ghashtbl; 44 struct gf128 hash; 45 uint32_t keysched[4*(RIJNDAEL_MAXNR + 1)]; 46 uint8_t counter[GMAC_BLOCK_LEN]; 47 int rounds; 48 }; 49 50 void AES_GMAC_Init(struct aes_gmac_ctx *); 51 void AES_GMAC_Setkey(struct aes_gmac_ctx *, const uint8_t *, uint16_t); 52 void AES_GMAC_Reinit(struct aes_gmac_ctx *, const uint8_t *, uint16_t); 53 int AES_GMAC_Update(struct aes_gmac_ctx *, const uint8_t *, uint16_t); 54 void AES_GMAC_Final(uint8_t [GMAC_DIGEST_LEN], struct aes_gmac_ctx *); 55 56 #endif /* _GMAC_H_ */ 57