include/crypto/vmac.h

   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  */
  44 struct 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
  54 typedef u64 vmac_t;
  55
  56 struct vmac_ctx_t {
  57         struct crypto_cipher *child;
  58         struct vmac_ctx __vmac_ctx;
  59         u8 partial[VMAC_NHBYTES];       /* partial block */
  60         int partial_size;               /* size of the partial block */
  61 };
  62
  63 #endif /* __CRYPTO_VMAC_H */