| c54131f4 |
1 | /* -*-c-*- |
| 2 | * |
| 3 | * $Id: cast-base.h,v 1.1 2000/06/17 10:48:29 mdw Exp $ |
| 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 $ |
| 33 | * Revision 1.1 2000/06/17 10:48:29 mdw |
| 34 | * CAST round function macros. |
| 35 | * |
| 36 | */ |
| 37 | |
| 38 | #ifndef CATACOMB_CAST_BASE_H |
| 39 | #define CATACOMB_CAST_BASE_H |
| 40 | |
| 41 | #ifdef __cplusplus |
| 42 | extern "C" { |
| 43 | #endif |
| 44 | |
| 45 | /*----- Header files ------------------------------------------------------*/ |
| 46 | |
| 47 | #include <mLib/bits.h> |
| 48 | |
| 49 | /*----- Round functions ---------------------------------------------------*/ |
| 50 | |
| 51 | #define CAST_R_guts(km, kr, xx, yy, aop, bop, cop) do { \ |
| 52 | uint32 i = km aop yy; \ |
| 53 | unsigned _r = kr; \ |
| 54 | i = ROL32(i, _r); \ |
| 55 | xx ^= ((cast_s[0][U8(i >> 24)] bop \ |
| 56 | cast_s[1][U8(i >> 16)]) cop \ |
| 57 | cast_s[2][U8(i >> 8)]) aop \ |
| 58 | cast_s[3][U8(i >> 0)]; \ |
| 59 | } while (0) |
| 60 | |
| 61 | #define CAST_R1(km, kr, xx, yy) CAST_R_guts(km, kr, xx, yy, +, ^, -) |
| 62 | #define CAST_R2(km, kr, xx, yy) CAST_R_guts(km, kr, xx, yy, ^, -, +) |
| 63 | #define CAST_R3(km, kr, xx, yy) CAST_R_guts(km, kr, xx, yy, -, +, ^) |
| 64 | |
| 65 | /*----- Global variables --------------------------------------------------*/ |
| 66 | |
| 67 | extern uint32 cast_s[4][256], cast_sk[4][256]; |
| 68 | |
| 69 | /*----- That's all, folks -------------------------------------------------*/ |
| 70 | |
| 71 | #ifdef __cplusplus |
| 72 | } |
| 73 | #endif |
| 74 | |
| 75 | #endif |
projects / u / mdw / catacomb / blame