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14386d4713
The helper crypto_tfm_ctx is only used by the Crypto API algorithm code and should really be in algapi.h. However, for historical reasons many files relied on it to be in crypto.h. This patch changes those files to use algapi.h instead in prepartion for a move. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
100 lines
3.3 KiB
C
100 lines
3.3 KiB
C
/*
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* Glue Code for assembler optimized version of TWOFISH
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*
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* Originally Twofish for GPG
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* By Matthew Skala <mskala@ansuz.sooke.bc.ca>, July 26, 1998
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* 256-bit key length added March 20, 1999
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* Some modifications to reduce the text size by Werner Koch, April, 1998
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* Ported to the kerneli patch by Marc Mutz <Marc@Mutz.com>
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* Ported to CryptoAPI by Colin Slater <hoho@tacomeat.net>
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*
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* The original author has disclaimed all copyright interest in this
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* code and thus put it in the public domain. The subsequent authors
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* have put this under the GNU General Public License.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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* USA
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*
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* This code is a "clean room" implementation, written from the paper
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* _Twofish: A 128-Bit Block Cipher_ by Bruce Schneier, John Kelsey,
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* Doug Whiting, David Wagner, Chris Hall, and Niels Ferguson, available
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* through http://www.counterpane.com/twofish.html
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*
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* For background information on multiplication in finite fields, used for
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* the matrix operations in the key schedule, see the book _Contemporary
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* Abstract Algebra_ by Joseph A. Gallian, especially chapter 22 in the
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* Third Edition.
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*/
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#include <crypto/algapi.h>
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#include <crypto/twofish.h>
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/types.h>
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asmlinkage void twofish_enc_blk(struct twofish_ctx *ctx, u8 *dst,
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const u8 *src);
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EXPORT_SYMBOL_GPL(twofish_enc_blk);
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asmlinkage void twofish_dec_blk(struct twofish_ctx *ctx, u8 *dst,
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const u8 *src);
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EXPORT_SYMBOL_GPL(twofish_dec_blk);
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static void twofish_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
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{
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twofish_enc_blk(crypto_tfm_ctx(tfm), dst, src);
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}
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static void twofish_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
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{
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twofish_dec_blk(crypto_tfm_ctx(tfm), dst, src);
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}
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static struct crypto_alg alg = {
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.cra_name = "twofish",
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.cra_driver_name = "twofish-asm",
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.cra_priority = 200,
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.cra_flags = CRYPTO_ALG_TYPE_CIPHER,
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.cra_blocksize = TF_BLOCK_SIZE,
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.cra_ctxsize = sizeof(struct twofish_ctx),
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.cra_alignmask = 0,
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.cra_module = THIS_MODULE,
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.cra_u = {
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.cipher = {
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.cia_min_keysize = TF_MIN_KEY_SIZE,
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.cia_max_keysize = TF_MAX_KEY_SIZE,
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.cia_setkey = twofish_setkey,
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.cia_encrypt = twofish_encrypt,
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.cia_decrypt = twofish_decrypt
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}
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}
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};
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static int __init twofish_glue_init(void)
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{
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return crypto_register_alg(&alg);
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}
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static void __exit twofish_glue_fini(void)
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{
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crypto_unregister_alg(&alg);
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}
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module_init(twofish_glue_init);
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module_exit(twofish_glue_fini);
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MODULE_LICENSE("GPL");
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MODULE_DESCRIPTION ("Twofish Cipher Algorithm, asm optimized");
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MODULE_ALIAS_CRYPTO("twofish");
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MODULE_ALIAS_CRYPTO("twofish-asm");
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