vmac.h
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/*
* Modified to interface to the Linux kernel
* Copyright (c) 2009, Intel Corporation.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program; if not, write to the Free Software Foundation, Inc., 59 Temple
* Place - Suite 330, Boston, MA 02111-1307 USA.
*/
#ifndef __CRYPTO_VMAC_H
#define __CRYPTO_VMAC_H
/* --------------------------------------------------------------------------
* VMAC and VHASH Implementation by Ted Krovetz (tdk@acm.org) and Wei Dai.
* This implementation is herby placed in the public domain.
* The authors offers no warranty. Use at your own risk.
* Please send bug reports to the authors.
* Last modified: 17 APR 08, 1700 PDT
* ----------------------------------------------------------------------- */
/*
* User definable settings.
*/
#define VMAC_TAG_LEN 64
#define VMAC_KEY_SIZE 128/* Must be 128, 192 or 256 */
#define VMAC_KEY_LEN (VMAC_KEY_SIZE/8)
#define VMAC_NHBYTES 128/* Must 2^i for any 3 < i < 13 Standard = 128*/
/*
* This implementation uses u32 and u64 as names for unsigned 32-
* and 64-bit integer types. These are defined in C99 stdint.h. The
* following may need adaptation if you are not running a C99 or
* Microsoft C environment.
*/
struct vmac_ctx {
u64 nhkey[(VMAC_NHBYTES/8)+2*(VMAC_TAG_LEN/64-1)];
u64 polykey[2*VMAC_TAG_LEN/64];
u64 l3key[2*VMAC_TAG_LEN/64];
u64 polytmp[2*VMAC_TAG_LEN/64];
u64 cached_nonce[2];
u64 cached_aes[2];
int first_block_processed;
};
typedef u64 vmac_t;
struct vmac_ctx_t {
struct crypto_cipher *child;
struct vmac_ctx __vmac_ctx;
u8 partial[VMAC_NHBYTES]; /* partial block */
int partial_size; /* size of the partial block */
};
#endif /* __CRYPTO_VMAC_H */