linux/include/crypto/vmac.h
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   1/*
   2 * Modified to interface to the Linux kernel
   3 * Copyright (c) 2009, Intel Corporation.
   4 *
   5 * This program is free software; you can redistribute it and/or modify it
   6 * under the terms and conditions of the GNU General Public License,
   7 * version 2, as published by the Free Software Foundation.
   8 *
   9 * This program is distributed in the hope it will be useful, but WITHOUT
  10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  12 * more details.
  13 *
  14 * You should have received a copy of the GNU General Public License along with
  15 * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
  16 * Place - Suite 330, Boston, MA 02111-1307 USA.
  17 */
  18
  19#ifndef __CRYPTO_VMAC_H
  20#define __CRYPTO_VMAC_H
  21
  22/* --------------------------------------------------------------------------
  23 * VMAC and VHASH Implementation by Ted Krovetz (tdk@acm.org) and Wei Dai.
  24 * This implementation is herby placed in the public domain.
  25 * The authors offers no warranty. Use at your own risk.
  26 * Please send bug reports to the authors.
  27 * Last modified: 17 APR 08, 1700 PDT
  28 * ----------------------------------------------------------------------- */
  29
  30/*
  31 * User definable settings.
  32 */
  33#define VMAC_TAG_LEN    64
  34#define VMAC_KEY_SIZE   128/* Must be 128, 192 or 256                   */
  35#define VMAC_KEY_LEN    (VMAC_KEY_SIZE/8)
  36#define VMAC_NHBYTES    128/* Must 2^i for any 3 < i < 13 Standard = 128*/
  37
  38/*
  39 * This implementation uses u32 and u64 as names for unsigned 32-
  40 * and 64-bit integer types. These are defined in C99 stdint.h. The
  41 * following may need adaptation if you are not running a C99 or
  42 * Microsoft C environment.
  43 */
  44struct vmac_ctx {
  45        u64 nhkey[(VMAC_NHBYTES/8)+2*(VMAC_TAG_LEN/64-1)];
  46        u64 polykey[2*VMAC_TAG_LEN/64];
  47        u64 l3key[2*VMAC_TAG_LEN/64];
  48        u64 polytmp[2*VMAC_TAG_LEN/64];
  49        u64 cached_nonce[2];
  50        u64 cached_aes[2];
  51        int first_block_processed;
  52};
  53
  54typedef u64 vmac_t;
  55
  56struct vmac_ctx_t {
  57        struct crypto_cipher *child;
  58        struct vmac_ctx __vmac_ctx;
  59};
  60
  61#endif /* __CRYPTO_VMAC_H */
  62
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