/*
* Glue Code for assembler optimized version of TWOFISH
*
* Originally Twofish for GPG
* By Matthew Skala < mskala @ ansuz . sooke . bc . ca > , July 26 , 1998
* 256 - bit key length added March 20 , 1999
* Some modifications to reduce the text size by Werner Koch , April , 1998
* Ported to the kerneli patch by Marc Mutz < Marc @ Mutz . com >
* Ported to CryptoAPI by Colin Slater < hoho @ tacomeat . net >
*
* The original author has disclaimed all copyright interest in this
* code and thus put it in the public domain . The subsequent authors
* have put this under the GNU General Public License .
*
* This program is free software ; you can redistribute it and / or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation ; either version 2 of the License , or
* ( at your option ) any later version .
*
* This program is distributed in the hope that 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
*
* This code is a " clean room " implementation , written from the paper
* _ Twofish : A 128 - Bit Block Cipher_ by Bruce Schneier , John Kelsey ,
* Doug Whiting , David Wagner , Chris Hall , and Niels Ferguson , available
* through http : //www.counterpane.com/twofish.html
*
* For background information on multiplication in finite fields , used for
* the matrix operations in the key schedule , see the book _ Contemporary
* Abstract Algebra_ by Joseph A . Gallian , especially chapter 22 in the
* Third Edition .
*/
#include <crypto/algapi.h>
#include <crypto/twofish.h>
#include <linux/export.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/types.h>
asmlinkage void twofish_enc_blk(struct twofish_ctx *ctx, u8 *dst,
const u8 *src);
EXPORT_SYMBOL_GPL(twofish_enc_blk);
asmlinkage void twofish_dec_blk(struct twofish_ctx *ctx, u8 *dst,
const u8 *src);
EXPORT_SYMBOL_GPL(twofish_dec_blk);
static void twofish_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
{
twofish_enc_blk(crypto_tfm_ctx(tfm), dst, src);
}
static void twofish_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
{
twofish_dec_blk(crypto_tfm_ctx(tfm), dst, src);
}
static struct crypto_alg alg = {
.cra_name = "twofish" ,
.cra_driver_name = "twofish-asm" ,
.cra_priority = 200 ,
.cra_flags = CRYPTO_ALG_TYPE_CIPHER,
.cra_blocksize = TF_BLOCK_SIZE,
.cra_ctxsize = sizeof (struct twofish_ctx),
.cra_module = THIS_MODULE,
.cra_u = {
.cipher = {
.cia_min_keysize = TF_MIN_KEY_SIZE,
.cia_max_keysize = TF_MAX_KEY_SIZE,
.cia_setkey = twofish_setkey,
.cia_encrypt = twofish_encrypt,
.cia_decrypt = twofish_decrypt
}
}
};
static int __init twofish_glue_init(void )
{
return crypto_register_alg(&alg);
}
static void __exit twofish_glue_fini(void )
{
crypto_unregister_alg(&alg);
}
module_init(twofish_glue_init);
module_exit(twofish_glue_fini);
MODULE_LICENSE("GPL" );
MODULE_DESCRIPTION ("Twofish Cipher Algorithm, asm optimized" );
MODULE_ALIAS_CRYPTO("twofish" );
MODULE_ALIAS_CRYPTO("twofish-asm" );
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