3 * $Id: twofish.h,v 1.3 2001/04/29 18:12:43 mdw Exp $
5 * The Twofish block cipher
7 * (c) 2000 Straylight/Edgeware
10 /*----- Licensing notice --------------------------------------------------*
12 * This file is part of Catacomb.
14 * Catacomb is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU Library General Public License as
16 * published by the Free Software Foundation; either version 2 of the
17 * License, or (at your option) any later version.
19 * Catacomb is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU Library General Public License for more details.
24 * You should have received a copy of the GNU Library General Public
25 * License along with Catacomb; if not, write to the Free
26 * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
30 /*----- Revision history --------------------------------------------------*
33 * Revision 1.3 2001/04/29 18:12:43 mdw
36 * Revision 1.2 2000/10/08 15:48:58 mdw
37 * Update comments now that AES has been chosen.
39 * Revision 1.1 2000/06/17 12:10:17 mdw
44 /*----- Notes on the Twofish block cipher ---------------------------------*
46 * Twofish was designed by Bruce Schneier, John Kelsey, Doug Whiting, David
47 * Wagner, Chris Hall and Niels Ferguson. The algorithm is unpatented and
48 * free for anyone to use. It was one of the five AES finalist algorithms.
50 * Twofish is a complex cipher offering various space and time tradeoffs.
51 * This implementation has a heavy key schedule and fast bulk encryption.
54 #ifndef CATACOMB_TWOFISH_H
55 #define CATACOMB_TWOFISH_H
61 /*----- Header files ------------------------------------------------------*/
65 #include <mLib/bits.h>
67 /*----- Magical numbers ---------------------------------------------------*/
69 #define TWOFISH_BLKSZ 16
70 #define TWOFISH_KEYSZ 32
71 #define TWOFISH_CLASS (N, L, 128)
73 extern const octet twofish_keysz
[];
75 /*----- Data structures ---------------------------------------------------*/
77 typedef struct twofish_ctx
{
82 /*----- Functions provided ------------------------------------------------*/
84 /* --- @twofish_init@ --- *
86 * Arguments: @twofish_ctx *k@ = pointer to key block to fill in
87 * @const void *buf@ = pointer to buffer of key material
88 * @size_t sz@ = size of key material
92 * Use: Initializes a Twofish key buffer. Twofish accepts keys of up
93 * to 256 bits in length.
96 extern void twofish_init(twofish_ctx */
*k*/
,
97 const void */
*buf*/
, size_t /*sz*/);
99 /* --- @twofish_eblk@, @twofish_dblk@ --- *
101 * Arguments: @const twofish_ctx *k@ = pointer to key block
102 * @const uint32 s[4]@ = pointer to source block
103 * @uint32 d[4]@ = pointer to destination block
107 * Use: Low-level block encryption and decryption.
110 extern void twofish_eblk(const twofish_ctx */
*k*/
,
111 const uint32 */
*s*/
, uint32 */
*d*/
);
113 extern void twofish_dblk(const twofish_ctx */
*k*/
,
114 const uint32 */
*s*/
, uint32 */
*d*/
);
116 /*----- That's all, folks -------------------------------------------------*/