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[CRYPTO] lrw: Liskov Rivest Wagner, a tweakable narrow block cipher mode

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Main module, this implements the Liskov Rivest Wagner block cipher mode
in the new blockcipher API. The implementation is based on ecb.c.

The LRW-32-AES specification I used can be found at:
http://grouper.ieee.org/groups/1619/email/pdf00017.pdf

It implements the optimization specified as optional in the
specification, and in addition it uses optimized multiplication
routines from gf128mul.c.

Since gf128mul.[ch] is not tested on bigendian, this cipher mode
may currently fail badly on bigendian machines.

Signed-off-by: Rik Snel <[email protected]>
Signed-off-by: Herbert Xu <[email protected]>
This commit is contained in:
Rik Snel 2006-11-26 09:43:10 +11:00 • committed by David S. Miller
commit 64470f1b85
3 changed files with 315 additions and 0 deletions
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13
crypto/Kconfig
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@ -168,6 +168,19 @@ config CRYPTO_CBC
CBC: Cipher Block Chaining mode
This block cipher algorithm is required for IPSec.
config CRYPTO_LRW
tristate "LRW support (EXPERIMENTAL)"
depends on EXPERIMENTAL
select CRYPTO_BLKCIPHER
select CRYPTO_MANAGER
select CRYPTO_GF128MUL
help
LRW: Liskov Rivest Wagner, a tweakable, non malleable, non movable
narrow block cipher mode for dm-crypt. Use it with cipher
specification string aes-lrw-benbi, the key must be 256, 320 or 384.
The first 128, 192 or 256 bits in the key are used for AES and the
rest is used to tie each cipher block to its logical position.
config CRYPTO_DES
tristate "DES and Triple DES EDE cipher algorithms"
select CRYPTO_ALGAPI