| /* | |
| * Glue Code for optimized x86_64 assembler version of TWOFISH | |
| * | |
| * Originally Twofish for GPG | |
| * By Matthew Skala <[email protected]>, 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 <[email protected]> | |
| * Ported to CryptoAPI by Colin Slater <[email protected]> | |
| * | |
| * 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/twofish.h> | |
| #include <linux/crypto.h> | |
| #include <linux/init.h> | |
| #include <linux/kernel.h> | |
| #include <linux/module.h> | |
| #include <linux/types.h> | |
| asmlinkage void twofish_enc_blk(struct crypto_tfm *tfm, u8 *dst, const u8 *src); | |
| asmlinkage void twofish_dec_blk(struct crypto_tfm *tfm, u8 *dst, const u8 *src); | |
| static void twofish_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src) | |
| { | |
| twofish_enc_blk(tfm, dst, src); | |
| } | |
| static void twofish_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src) | |
| { | |
| twofish_dec_blk(tfm, dst, src); | |
| } | |
| static struct crypto_alg alg = { | |
| .cra_name = "twofish", | |
| .cra_driver_name = "twofish-x86_64", | |
| .cra_priority = 200, | |
| .cra_flags = CRYPTO_ALG_TYPE_CIPHER, | |
| .cra_blocksize = TF_BLOCK_SIZE, | |
| .cra_ctxsize = sizeof(struct twofish_ctx), | |
| .cra_alignmask = 3, | |
| .cra_module = THIS_MODULE, | |
| .cra_list = LIST_HEAD_INIT(alg.cra_list), | |
| .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 init(void) | |
| { | |
| return crypto_register_alg(&alg); | |
| } | |
| static void __exit fini(void) | |
| { | |
| crypto_unregister_alg(&alg); | |
| } | |
| module_init(init); | |
| module_exit(fini); | |
| MODULE_LICENSE("GPL"); | |
| MODULE_DESCRIPTION ("Twofish Cipher Algorithm, x86_64 asm optimized"); | |
| MODULE_ALIAS("twofish"); |