3 * $Id: rijndael.h,v 1.1 2000/06/17 11:56:07 mdw Exp $
5 * The Rijndael 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 --------------------------------------------------*
32 * $Log: rijndael.h,v $
33 * Revision 1.1 2000/06/17 11:56:07 mdw
38 /*----- Notes on the Rijndael block cipher --------------------------------*
40 * Invented by Joan Daemen and Vincent Rijmen, Rijndael is a fast and
41 * relatively simple 128-bit block cipher proposed by the designers as an AES
42 * candidate. At the time of writing, the AES winner hasn't been decided.
43 * Rijnadel is fast, but has a low security margin. I recommend waiting
44 * before using Rijndael for any sensitive applications.
47 #ifndef CATACOMB_RIJNDAEL_H
48 #define CATACOMB_RIJNDAEL_H
54 /*----- Header files ------------------------------------------------------*/
58 #include <mLib/bits.h>
60 /*----- Magical numbers ---------------------------------------------------*/
62 #define RIJNDAEL_BLKSZ 16
63 #define RIJNDAEL_KEYSZ 32
64 #define RIJNDAEL_CLASS (N, L, 128)
66 extern const octet rijndael_keysz
[];
68 /*----- Data structures ---------------------------------------------------*/
70 #define RIJNDAEL_MAXROUNDS 32
71 #define RIJNDAEL_KWORDS ((RIJNDAEL_MAXROUNDS + 1) * (RIJNDAEL_BLKSZ / 4))
73 typedef struct rijndael_ctx
{
75 uint32 w
[RIJNDAEL_KWORDS
];
76 uint32 wi
[RIJNDAEL_KWORDS
];
79 /*----- Functions provided ------------------------------------------------*/
81 /* --- @rijndael_init@ --- *
83 * Arguments: @rijndael_ctx *k@ = pointer to context to initialize
84 * @const void *buf@ = pointer to buffer of key material
85 * @size_t sz@ = size of the key material
89 * Use: Initializes a Rijndael context with a particular key. This
90 * implementation of Rijndael doesn't impose any particular
91 * limits on the key size except that it must be multiple of 4
92 * bytes long. 256 bits seems sensible, though.
95 extern void rijndael_init(rijndael_ctx */
*k*/
,
96 const void */
*buf*/
, size_t /*sz*/);
98 /* --- @rijndael_eblk@, @rijndael_dblk@ --- *
100 * Arguments: @const rijndael_ctx *k@ = pointer to Rijndael context
101 * @const uint32 s[4]@ = pointer to source block
102 * @uint32 d[4]@ = pointer to destination block
106 * Use: Low-level block encryption and decryption.
109 extern void rijndael_eblk(const rijndael_ctx */
*k*/
,
110 const uint32 */
*s*/
, uint32 */
*dst*/
);
111 extern void rijndael_dblk(const rijndael_ctx */
*k*/
,
112 const uint32 */
*s*/
, uint32 */
*dst*/
);
114 /*----- That's all, folks -------------------------------------------------*/