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1 | /* -*-c-*- |
2 | * |
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3 | * $Id: cast-base.h,v 1.2 2004/04/02 01:03:49 mdw Exp $ |
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4 | * |
5 | * Basic macros and definitions for CAST-128 and CAST-256 |
6 | * |
7 | * (c) 2000 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: cast-base.h,v $ |
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33 | * Revision 1.2 2004/04/02 01:03:49 mdw |
34 | * Miscellaneous constification. |
35 | * |
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36 | * Revision 1.1 2000/06/17 10:48:29 mdw |
37 | * CAST round function macros. |
38 | * |
39 | */ |
40 | |
41 | #ifndef CATACOMB_CAST_BASE_H |
42 | #define CATACOMB_CAST_BASE_H |
43 | |
44 | #ifdef __cplusplus |
45 | extern "C" { |
46 | #endif |
47 | |
48 | /*----- Header files ------------------------------------------------------*/ |
49 | |
50 | #include <mLib/bits.h> |
51 | |
52 | /*----- Round functions ---------------------------------------------------*/ |
53 | |
54 | #define CAST_R_guts(km, kr, xx, yy, aop, bop, cop) do { \ |
55 | uint32 i = km aop yy; \ |
56 | unsigned _r = kr; \ |
57 | i = ROL32(i, _r); \ |
58 | xx ^= ((cast_s[0][U8(i >> 24)] bop \ |
59 | cast_s[1][U8(i >> 16)]) cop \ |
60 | cast_s[2][U8(i >> 8)]) aop \ |
61 | cast_s[3][U8(i >> 0)]; \ |
62 | } while (0) |
63 | |
64 | #define CAST_R1(km, kr, xx, yy) CAST_R_guts(km, kr, xx, yy, +, ^, -) |
65 | #define CAST_R2(km, kr, xx, yy) CAST_R_guts(km, kr, xx, yy, ^, -, +) |
66 | #define CAST_R3(km, kr, xx, yy) CAST_R_guts(km, kr, xx, yy, -, +, ^) |
67 | |
68 | /*----- Global variables --------------------------------------------------*/ |
69 | |
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70 | extern const uint32 cast_s[4][256], cast_sk[4][256]; |
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71 | |
72 | /*----- That's all, folks -------------------------------------------------*/ |
73 | |
74 | #ifdef __cplusplus |
75 | } |
76 | #endif |
77 | |
78 | #endif |