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1 | /* -*-c-*- |
2 | * |
3 | * $Id: safer.h,v 1.1 2001/04/29 17:37:35 mdw Exp $ |
4 | * |
5 | * The SAFER 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: safer.h,v $ |
33 | * Revision 1.1 2001/04/29 17:37:35 mdw |
34 | * Added SAFER block cipher. |
35 | * |
36 | */ |
37 | |
38 | #ifndef CATACOMB_SAFER_H |
39 | #define CATACOMB_SAFER_H |
40 | |
41 | #ifdef __cplusplus |
42 | extern "C" { |
43 | #endif |
44 | |
45 | /*----- Header files ------------------------------------------------------*/ |
46 | |
47 | #include <stddef.h> |
48 | |
49 | #include <mLib/bits.h> |
50 | |
51 | /*----- Magical numbers ---------------------------------------------------*/ |
52 | |
53 | #define SAFER_BLKSZ 8 |
54 | #define SAFER_KEYSZ 8 |
55 | #define SAFER_CLASS (N, B, 64) |
56 | |
57 | #define SAFERSK_BLKSZ SAFER_BLKSZ |
58 | #define SAFERSK_KEYSZ 16 |
59 | #define SAFERSK_CLASS SAFER_CLASS |
60 | |
61 | #define SAFER_MAXROUNDS 12 |
62 | |
63 | extern const octet safer_keysz[]; |
64 | #define safersk_keysz safer_keysz |
65 | |
66 | /*----- Data structures ---------------------------------------------------*/ |
67 | |
68 | typedef struct safer_ctx { |
69 | octet k[8 * (2 * SAFER_MAXROUNDS + 1)]; |
70 | unsigned r; |
71 | } safer_ctx, safersk_ctx; |
72 | |
73 | /*----- Functions provided ------------------------------------------------*/ |
74 | |
75 | /* --- @safer_setup@ --- * |
76 | * |
77 | * Arguments: @safer_ctx *k@ = pointer to context to initialize |
78 | * @unsigned r@ = number of rounds wanted |
79 | * @unsigned f@ = various other flags |
80 | * @const void *buf@ = pointer to key material |
81 | * @size_t sz@ = size of key material in bytes |
82 | * |
83 | * Returns: --- |
84 | * |
85 | * Use: Initializes an SAFER expanded key. A default number of |
86 | * rounds is chosen, based on the key length. |
87 | */ |
88 | |
89 | #define SAFER_SK 1u |
90 | |
91 | extern void safer_setup(safer_ctx */*k*/, unsigned /*r*/, unsigned /*f*/, |
92 | const void */*buf*/, size_t /*sz*/); |
93 | |
94 | /* --- @safer_init@, @safersk_init@ --- * |
95 | * |
96 | * Arguments: @safer_ctx *k@ = pointer to context to initialize |
97 | * @const void *buf@ = pointer to key material |
98 | * @size_t sz@ = size of key material in bytes |
99 | * |
100 | * Returns: --- |
101 | * |
102 | * Use: Initializes an SAFER expanded key. A default number of |
103 | * rounds is chosen, based on the key length. |
104 | */ |
105 | |
106 | extern void safer_init(safer_ctx */*k*/, |
107 | const void */*buf*/, size_t /*sz*/); |
108 | extern void safersk_init(safer_ctx */*k*/, |
109 | const void */*buf*/, size_t /*sz*/); |
110 | |
111 | /* --- @safer_eblk@, @safer_dblk@ --- * |
112 | * |
113 | * Arguments: @const safer_ctx *k@ = pointer to SAFER context |
114 | * @const uint32 s[2]@ = pointer to source block |
115 | * @const uint32 d[2]@ = pointer to destination block |
116 | * |
117 | * Returns: --- |
118 | * |
119 | * Use: Low-level block encryption and decryption. |
120 | */ |
121 | |
122 | extern void safer_eblk(const safer_ctx */*k*/, |
123 | const uint32 */*s*/, uint32 */*dst*/); |
124 | extern void safer_dblk(const safer_ctx */*k*/, |
125 | const uint32 */*s*/, uint32 */*dst*/); |
126 | |
127 | #define safersk_eblk safer_eblk |
128 | #define safersk_dblk safer_dblk |
129 | |
130 | /*----- That's all, folks -------------------------------------------------*/ |
131 | |
132 | #ifdef __cplusplus |
133 | } |
134 | #endif |
135 | |
136 | #endif |