git.distorted.org.uk Git - u/mdw/catacomb/blob - rijndael-base.h

   1 /* -*-c-*-
   2  *
   3  * $Id: rijndael-base.h,v 1.2 2004/04/08 01:36:15 mdw Exp $
   4  *
   5  * Internal header for Rijndael implementation
   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 #ifndef CATACOMB_RIJNDAEL_BASE_H
  31 #define CATACOMB_RIJNDAEL_BASE_H
  32
  33 #ifdef __cplusplus
  34   extern "C" {
  35 #endif
  36
  37 /*----- Header files ------------------------------------------------------*/
  38
  39 #include <mLib/bits.h>
  40
  41 /*----- Constant tables ---------------------------------------------------*/
  42
  43 extern const octet rijndael_s[256];
  44 extern const octet rijndael_si[256];
  45 extern const uint32 rijndael_t[4][256];
  46 extern const uint32 rijndael_ti[4][256];
  47 extern const uint32 rijndael_u[4][256];
  48 extern const octet rijndael_rcon[];
  49
  50 #define S rijndael_s
  51 #define SI rijndael_si
  52 #define T rijndael_t
  53 #define TI rijndael_ti
  54 #define U rijndael_u
  55 #define RCON rijndael_rcon
  56
  57 /*----- Handy macros ------------------------------------------------------*/
  58
  59 #define SUB(s, a, b, c, d)                                              \
  60   (s[U8((a) >> 24)] << 24 | s[U8((b) >> 16)] << 16 |                    \
  61    s[U8((c) >>  8)] <<  8 | s[U8((d) >>  0)] <<  0)
  62
  63 #define MIX(t, a, b, c, d)                                              \
  64    (t[0][U8((a) >> 24)] ^ t[1][U8((b) >> 16)] ^                         \
  65     t[2][U8((c) >>  8)] ^ t[3][U8((d) >>  0)])
  66
  67 /*----- That's all, folks -------------------------------------------------*/
  68
  69 #ifdef __cplusplus
  70   }
  71 #endif
  72
  73 #endif