Root/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 */
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    u8 partial[VMAC_NHBYTES]; /* partial block */
60    int partial_size; /* size of the partial block */
61};
62
63#endif /* __CRYPTO_VMAC_H */
64

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