3bef8c14 |
1 | /* -*-c-*- |
2 | * |
3 | * $Id: mars.h,v 1.1 2001/04/29 18:11:19 mdw Exp $ |
4 | * |
5 | * The MARS block cipher |
6 | * |
7 | * (c) 2001 Straylight/Edgeware |
8 | */ |
9 | |
10 | /*----- Licensing notice --------------------------------------------------* |
11 | * |
12 | * This file is part of Catacomb. |
13 | * |
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. |
18 | * |
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. |
23 | * |
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, |
27 | * MA 02111-1307, USA. |
28 | */ |
29 | |
30 | /*----- Revision history --------------------------------------------------* |
31 | * |
32 | * $Log: mars.h,v $ |
33 | * Revision 1.1 2001/04/29 18:11:19 mdw |
34 | * New block cipher MARS. |
35 | * |
36 | */ |
37 | |
38 | /*----- Notes on the MARS block cipher ------------------------------------* |
39 | * |
40 | * MARS was IBM's submission to the AES contest. It was designed by a number |
41 | * of clever people at the T. J. Watson labs, and made it to the second round |
42 | * of the contest. Unfortunately, MARS is rather messy. There are some |
43 | * awkward corner cases in the key schedule algorithm, for example, that show |
44 | * up very rarely. |
45 | */ |
46 | |
47 | #ifndef CATACOMB_MARS_H |
48 | #define CATACOMB_MARS_H |
49 | |
50 | #ifdef __cplusplus |
51 | extern "C" { |
52 | #endif |
53 | |
54 | /*----- Header files ------------------------------------------------------*/ |
55 | |
56 | #include <stddef.h> |
57 | |
58 | #include <mLib/bits.h> |
59 | |
60 | /*----- Magical numbers ---------------------------------------------------*/ |
61 | |
62 | #define MARS_BLKSZ 16 |
63 | #define MARS_KEYSZ 32 |
64 | #define MARS_CLASS (N, L, 128) |
65 | |
66 | extern const octet mars_keysz[]; |
67 | |
68 | /*----- Data structures ---------------------------------------------------*/ |
69 | |
70 | typedef struct mars_ctx { |
71 | uint32 k[40]; |
72 | } mars_ctx; |
73 | |
74 | /*----- Functions provided ------------------------------------------------*/ |
75 | |
76 | /* --- @mars_init@ --- * |
77 | * |
78 | * Arguments: @mars_ctx *k@ = pointer to key block to fill in |
79 | * @const void *buf@ = pointer to buffer of key material |
80 | * @size_t sz@ = size of key material |
81 | * |
82 | * Returns: --- |
83 | * |
84 | * Use: Initializes a MARS key buffer. MARS accepts key sizes |
85 | * between 128 and 448 bits which are a multiple of 32 bits. |
86 | */ |
87 | |
88 | extern void mars_init(mars_ctx */*k*/, |
89 | const void */*buf*/, size_t /*sz*/); |
90 | |
91 | /* --- @mars_eblk@, @mars_dblk@ --- * |
92 | * |
93 | * Arguments: @const mars_ctx *k@ = pointer to key block |
94 | * @const uint32 s[4]@ = pointer to source block |
95 | * @uint32 d[4]@ = pointer to destination block |
96 | * |
97 | * Returns: --- |
98 | * |
99 | * Use: Low-level block encryption and decryption. |
100 | */ |
101 | |
102 | extern void mars_eblk(const mars_ctx */*k*/, |
103 | const uint32 */*s*/, uint32 */*d*/); |
104 | |
105 | extern void mars_dblk(const mars_ctx */*k*/, |
106 | const uint32 */*s*/, uint32 */*d*/); |
107 | |
108 | /*----- That's all, folks -------------------------------------------------*/ |
109 | |
110 | #ifdef __cplusplus |
111 | } |
112 | #endif |
113 | |
114 | #endif |