ba1ee07090
VMAC implementation, as it is, does not work with blocks that are not multiples of 128-bytes. Furthermore, this is a problem when using the implementation on scatterlists, even when the complete plain text is 128-byte multiple, as the pieces that get passed to vmac_update can be pretty much any size. I also added test cases for unaligned blocks. Signed-off-by: Salman Qazi <sqazi@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
63 lines
2.1 KiB
C
63 lines
2.1 KiB
C
/*
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* Modified to interface to the Linux kernel
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* Copyright (c) 2009, Intel Corporation.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc., 59 Temple
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* Place - Suite 330, Boston, MA 02111-1307 USA.
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*/
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#ifndef __CRYPTO_VMAC_H
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#define __CRYPTO_VMAC_H
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/* --------------------------------------------------------------------------
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* VMAC and VHASH Implementation by Ted Krovetz (tdk@acm.org) and Wei Dai.
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* This implementation is herby placed in the public domain.
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* The authors offers no warranty. Use at your own risk.
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* Please send bug reports to the authors.
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* Last modified: 17 APR 08, 1700 PDT
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* ----------------------------------------------------------------------- */
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/*
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* User definable settings.
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*/
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#define VMAC_TAG_LEN 64
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#define VMAC_KEY_SIZE 128/* Must be 128, 192 or 256 */
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#define VMAC_KEY_LEN (VMAC_KEY_SIZE/8)
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#define VMAC_NHBYTES 128/* Must 2^i for any 3 < i < 13 Standard = 128*/
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/*
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* This implementation uses u32 and u64 as names for unsigned 32-
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* and 64-bit integer types. These are defined in C99 stdint.h. The
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* following may need adaptation if you are not running a C99 or
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* Microsoft C environment.
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*/
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struct vmac_ctx {
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u64 nhkey[(VMAC_NHBYTES/8)+2*(VMAC_TAG_LEN/64-1)];
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u64 polykey[2*VMAC_TAG_LEN/64];
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u64 l3key[2*VMAC_TAG_LEN/64];
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u64 polytmp[2*VMAC_TAG_LEN/64];
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u64 cached_nonce[2];
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u64 cached_aes[2];
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int first_block_processed;
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};
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typedef u64 vmac_t;
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struct vmac_ctx_t {
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struct crypto_cipher *child;
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struct vmac_ctx __vmac_ctx;
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u8 partial[VMAC_NHBYTES]; /* partial block */
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int partial_size; /* size of the partial block */
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};
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#endif /* __CRYPTO_VMAC_H */
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