3 * $Id: mars.h,v 1.2 2004/04/08 01:36:15 mdw Exp $
5 * The MARS block cipher
7 * (c) 2001 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 /*----- Notes on the MARS block cipher ------------------------------------*
32 * MARS was IBM's submission to the AES contest. It was designed by a number
33 * of clever people at the T. J. Watson labs, and made it to the second round
34 * of the contest. Unfortunately, MARS is rather messy. There are some
35 * awkward corner cases in the key schedule algorithm, for example, that show
39 #ifndef CATACOMB_MARS_H
40 #define CATACOMB_MARS_H
46 /*----- Header files ------------------------------------------------------*/
50 #include <mLib/bits.h>
52 /*----- Magical numbers ---------------------------------------------------*/
56 #define MARS_CLASS (N, L, 128)
58 extern const octet mars_keysz[];
60 /*----- Data structures ---------------------------------------------------*/
62 typedef struct mars_ctx {
66 /*----- Functions provided ------------------------------------------------*/
68 /* --- @mars_init@ --- *
70 * Arguments: @mars_ctx *k@ = pointer to key block to fill in
71 * @const void *buf@ = pointer to buffer of key material
72 * @size_t sz@ = size of key material
76 * Use: Initializes a MARS key buffer. MARS accepts key sizes
77 * between 128 and 448 bits which are a multiple of 32 bits.
80 extern void mars_init(mars_ctx */*k*/,
81 const void */*buf*/, size_t /*sz*/);
83 /* --- @mars_eblk@, @mars_dblk@ --- *
85 * Arguments: @const mars_ctx *k@ = pointer to key block
86 * @const uint32 s[4]@ = pointer to source block
87 * @uint32 d[4]@ = pointer to destination block
91 * Use: Low-level block encryption and decryption.
94 extern void mars_eblk(const mars_ctx */*k*/,
95 const uint32 */*s*/, uint32 */*d*/);
97 extern void mars_dblk(const mars_ctx */*k*/,
98 const uint32 */*s*/, uint32 */*d*/);
100 /*----- That's all, folks -------------------------------------------------*/