3 * Basic macros and definitions for CAST-128 and CAST-256
5 * (c) 2000 Straylight/Edgeware
8 /*----- Licensing notice --------------------------------------------------*
10 * This file is part of Catacomb.
12 * Catacomb is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU Library General Public License as
14 * published by the Free Software Foundation; either version 2 of the
15 * License, or (at your option) any later version.
17 * Catacomb is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU Library General Public License for more details.
22 * You should have received a copy of the GNU Library General Public
23 * License along with Catacomb; if not, write to the Free
24 * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
28 #ifndef CATACOMB_CAST_BASE_H
29 #define CATACOMB_CAST_BASE_H
35 /*----- Header files ------------------------------------------------------*/
37 #include <mLib/bits.h>
39 /*----- Round functions ---------------------------------------------------*/
41 #define CAST_R_guts(km, kr, xx, yy, aop, bop, cop) do { \
42 uint32 i = km aop yy; \
45 xx ^= ((cast_s[0][U8(i >> 24)] bop \
46 cast_s[1][U8(i >> 16)]) cop \
47 cast_s[2][U8(i >> 8)]) aop \
48 cast_s[3][U8(i >> 0)]; \
51 #define CAST_R1(km, kr, xx, yy) CAST_R_guts(km, kr, xx, yy, +, ^, -)
52 #define CAST_R2(km, kr, xx, yy) CAST_R_guts(km, kr, xx, yy, ^, -, +)
53 #define CAST_R3(km, kr, xx, yy) CAST_R_guts(km, kr, xx, yy, -, +, ^)
55 /*----- Global variables --------------------------------------------------*/
57 extern const uint32 cast_s
[4][256], cast_sk
[4][256];
59 /*----- That's all, folks -------------------------------------------------*/