FreeBSD/Linux Kernel Cross Reference
sys/opencrypto/gmac.h

     /*-
      * Copyright (c) 2014 The FreeBSD Foundation
      * All rights reserved.
      *
      * This software was developed by John-Mark Gurney under
      * the sponsorship of the FreeBSD Foundation and
      * Rubicon Communications, LLC (Netgate).
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
     * are met:
     * 1.  Redistributions of source code must retain the above copyright
     *     notice, this list of conditions and the following disclaimer.
     * 2.  Redistributions in binary form must reproduce the above copyright
     *     notice, this list of conditions and the following disclaimer in the
     *     documentation and/or other materials provided with the distribution.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     *
     *      $FreeBSD$
     *
     */
    
    #ifndef _GMAC_H_
    #define _GMAC_H_
    
    #include "gfmult.h"
    #include <crypto/rijndael/rijndael.h>
    
    #define GMAC_BLOCK_LEN  16
    #define GMAC_DIGEST_LEN 16
    
    struct aes_gmac_ctx {
            struct gf128table4      ghashtbl;
            struct gf128            hash;
            uint32_t                keysched[4*(RIJNDAEL_MAXNR + 1)];
            uint8_t                 counter[GMAC_BLOCK_LEN];
            int                     rounds;
    };
    
    void AES_GMAC_Init(struct aes_gmac_ctx *);
    void AES_GMAC_Setkey(struct aes_gmac_ctx *, const uint8_t *, uint16_t);
    void AES_GMAC_Reinit(struct aes_gmac_ctx *, const uint8_t *, uint16_t);
    int AES_GMAC_Update(struct aes_gmac_ctx *, const uint8_t *, uint16_t);
    void AES_GMAC_Final(uint8_t [GMAC_DIGEST_LEN], struct aes_gmac_ctx *);
    
    #endif /* _GMAC_H_ */

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