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1/*
2 * Glue Code for assembler optimized version of TWOFISH
3 *
4 * Originally Twofish for GPG
5 * By Matthew Skala <mskala@ansuz.sooke.bc.ca>, July 26, 1998
6 * 256-bit key length added March 20, 1999
7 * Some modifications to reduce the text size by Werner Koch, April, 1998
8 * Ported to the kerneli patch by Marc Mutz <Marc@Mutz.com>
9 * Ported to CryptoAPI by Colin Slater <hoho@tacomeat.net>
10 *
11 * The original author has disclaimed all copyright interest in this
12 * code and thus put it in the public domain. The subsequent authors
13 * have put this under the GNU General Public License.
14 *
15 * This program is free software; you can redistribute it and/or modify
16 * it under the terms of the GNU General Public License as published by
17 * the Free Software Foundation; either version 2 of the License, or
18 * (at your option) any later version.
19 *
20 * This program is distributed in the hope that it will be useful,
21 * but WITHOUT ANY WARRANTY; without even the implied warranty of
22 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23 * GNU General Public License for more details.
24 *
25 * You should have received a copy of the GNU General Public License
26 * along with this program; if not, write to the Free Software
27 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
28 * USA
29 *
30 * This code is a "clean room" implementation, written from the paper
31 * _Twofish: A 128-Bit Block Cipher_ by Bruce Schneier, John Kelsey,
32 * Doug Whiting, David Wagner, Chris Hall, and Niels Ferguson, available
33 * through http://www.counterpane.com/twofish.html
34 *
35 * For background information on multiplication in finite fields, used for
36 * the matrix operations in the key schedule, see the book _Contemporary
37 * Abstract Algebra_ by Joseph A. Gallian, especially chapter 22 in the
38 * Third Edition.
39 */
40
41#include <crypto/twofish.h>
42#include <linux/crypto.h>
43#include <linux/init.h>
44#include <linux/module.h>
45#include <linux/types.h>
46
47asmlinkage void twofish_enc_blk(struct crypto_tfm *tfm, u8 *dst, const u8 *src);
48asmlinkage void twofish_dec_blk(struct crypto_tfm *tfm, u8 *dst, const u8 *src);
49
50static void twofish_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
51{
52 twofish_enc_blk(tfm, dst, src);
53}
54
55static void twofish_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
56{
57 twofish_dec_blk(tfm, dst, src);
58}
59
60static struct crypto_alg alg = {
61 .cra_name = "twofish",
62 .cra_driver_name = "twofish-asm",
63 .cra_priority = 200,
64 .cra_flags = CRYPTO_ALG_TYPE_CIPHER,
65 .cra_blocksize = TF_BLOCK_SIZE,
66 .cra_ctxsize = sizeof(struct twofish_ctx),
67 .cra_alignmask = 3,
68 .cra_module = THIS_MODULE,
69 .cra_list = LIST_HEAD_INIT(alg.cra_list),
70 .cra_u = {
71 .cipher = {
72 .cia_min_keysize = TF_MIN_KEY_SIZE,
73 .cia_max_keysize = TF_MAX_KEY_SIZE,
74 .cia_setkey = twofish_setkey,
75 .cia_encrypt = twofish_encrypt,
76 .cia_decrypt = twofish_decrypt
77 }
78 }
79};
80
81static int __init init(void)
82{
83 return crypto_register_alg(&alg);
84}
85
86static void __exit fini(void)
87{
88 crypto_unregister_alg(&alg);
89}
90
91module_init(init);
92module_exit(fini);
93
94MODULE_LICENSE("GPL");
95MODULE_DESCRIPTION ("Twofish Cipher Algorithm, asm optimized");
96MODULE_ALIAS("twofish");
97MODULE_ALIAS("twofish-asm");
1/*
2 * Glue Code for assembler optimized version of TWOFISH
3 *
4 * Originally Twofish for GPG
5 * By Matthew Skala <mskala@ansuz.sooke.bc.ca>, July 26, 1998
6 * 256-bit key length added March 20, 1999
7 * Some modifications to reduce the text size by Werner Koch, April, 1998
8 * Ported to the kerneli patch by Marc Mutz <Marc@Mutz.com>
9 * Ported to CryptoAPI by Colin Slater <hoho@tacomeat.net>
10 *
11 * The original author has disclaimed all copyright interest in this
12 * code and thus put it in the public domain. The subsequent authors
13 * have put this under the GNU General Public License.
14 *
15 * This program is free software; you can redistribute it and/or modify
16 * it under the terms of the GNU General Public License as published by
17 * the Free Software Foundation; either version 2 of the License, or
18 * (at your option) any later version.
19 *
20 * This program is distributed in the hope that it will be useful,
21 * but WITHOUT ANY WARRANTY; without even the implied warranty of
22 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23 * GNU General Public License for more details.
24 *
25 * You should have received a copy of the GNU General Public License
26 * along with this program; if not, write to the Free Software
27 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
28 * USA
29 *
30 * This code is a "clean room" implementation, written from the paper
31 * _Twofish: A 128-Bit Block Cipher_ by Bruce Schneier, John Kelsey,
32 * Doug Whiting, David Wagner, Chris Hall, and Niels Ferguson, available
33 * through http://www.counterpane.com/twofish.html
34 *
35 * For background information on multiplication in finite fields, used for
36 * the matrix operations in the key schedule, see the book _Contemporary
37 * Abstract Algebra_ by Joseph A. Gallian, especially chapter 22 in the
38 * Third Edition.
39 */
40
41#include <crypto/twofish.h>
42#include <linux/crypto.h>
43#include <linux/init.h>
44#include <linux/module.h>
45#include <linux/types.h>
46
47asmlinkage void twofish_enc_blk(struct twofish_ctx *ctx, u8 *dst,
48 const u8 *src);
49EXPORT_SYMBOL_GPL(twofish_enc_blk);
50asmlinkage void twofish_dec_blk(struct twofish_ctx *ctx, u8 *dst,
51 const u8 *src);
52EXPORT_SYMBOL_GPL(twofish_dec_blk);
53
54static void twofish_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
55{
56 twofish_enc_blk(crypto_tfm_ctx(tfm), dst, src);
57}
58
59static void twofish_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
60{
61 twofish_dec_blk(crypto_tfm_ctx(tfm), dst, src);
62}
63
64static struct crypto_alg alg = {
65 .cra_name = "twofish",
66 .cra_driver_name = "twofish-asm",
67 .cra_priority = 200,
68 .cra_flags = CRYPTO_ALG_TYPE_CIPHER,
69 .cra_blocksize = TF_BLOCK_SIZE,
70 .cra_ctxsize = sizeof(struct twofish_ctx),
71 .cra_alignmask = 0,
72 .cra_module = THIS_MODULE,
73 .cra_u = {
74 .cipher = {
75 .cia_min_keysize = TF_MIN_KEY_SIZE,
76 .cia_max_keysize = TF_MAX_KEY_SIZE,
77 .cia_setkey = twofish_setkey,
78 .cia_encrypt = twofish_encrypt,
79 .cia_decrypt = twofish_decrypt
80 }
81 }
82};
83
84static int __init init(void)
85{
86 return crypto_register_alg(&alg);
87}
88
89static void __exit fini(void)
90{
91 crypto_unregister_alg(&alg);
92}
93
94module_init(init);
95module_exit(fini);
96
97MODULE_LICENSE("GPL");
98MODULE_DESCRIPTION ("Twofish Cipher Algorithm, asm optimized");
99MODULE_ALIAS_CRYPTO("twofish");
100MODULE_ALIAS_CRYPTO("twofish-asm");