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include
crypto
lrw.h
Go to the documentation of this file.
1
#ifndef _CRYPTO_LRW_H
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#define _CRYPTO_LRW_H
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#include <
crypto/b128ops.h
>
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struct
scatterlist
;
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struct
gf128mul_64k
;
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struct
blkcipher_desc
;
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#define LRW_BLOCK_SIZE 16
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struct
lrw_table_ctx
{
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/* optimizes multiplying a random (non incrementing, as at the
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* start of a new sector) value with key2, we could also have
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* used 4k optimization tables or no optimization at all. In the
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* latter case we would have to store key2 here */
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struct
gf128mul_64k
*
table
;
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/* stores:
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* key2*{ 0,0,...0,0,0,0,1 }, key2*{ 0,0,...0,0,0,1,1 },
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* key2*{ 0,0,...0,0,1,1,1 }, key2*{ 0,0,...0,1,1,1,1 }
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* key2*{ 0,0,...1,1,1,1,1 }, etc
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* needed for optimized multiplication of incrementing values
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* with key2 */
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be128
mulinc
[128];
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};
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int
lrw_init_table
(
struct
lrw_table_ctx
*
ctx
,
const
u8
*tweak);
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void
lrw_free_table
(
struct
lrw_table_ctx
*
ctx
);
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struct
lrw_crypt_req
{
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be128
*
tbuf
;
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unsigned
int
tbuflen
;
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struct
lrw_table_ctx
*
table_ctx
;
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void
*
crypt_ctx
;
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void
(*
crypt_fn
)(
void
*
ctx
,
u8
*blks,
unsigned
int
nbytes
);
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};
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int
lrw_crypt
(
struct
blkcipher_desc
*
desc
,
struct
scatterlist
*
dst
,
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struct
scatterlist
*
src
,
unsigned
int
nbytes
,
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struct
lrw_crypt_req
*
req
);
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#endif
/* _CRYPTO_LRW_H */
Generated on Thu Jan 10 2013 14:50:54 for Linux Kernel by
1.8.2