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