| /* |
| * Glue Code for assembler optimized 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/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_alignmask = 0, |
| .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 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, asm optimized"); |
| MODULE_ALIAS_CRYPTO("twofish"); |
| MODULE_ALIAS_CRYPTO("twofish-asm"); |
