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

   1 /* -*-c-*-
   2  *
   3  * Internal header for Rijndael implementation
   4  *
   5  * (c) 2001 Straylight/Edgeware
   6  */
   7
   8 /*----- Licensing notice --------------------------------------------------*
   9  *
  10  * This file is part of Catacomb.
  11  *
  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.
  16  *
  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.
  21  *
  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,
  25  * MA 02111-1307, USA.
  26  */
  27
  28 #ifndef CATACOMB_RIJNDAEL_BASE_H
  29 #define CATACOMB_RIJNDAEL_BASE_H
  30
  31 #ifdef __cplusplus
  32   extern "C" {
  33 #endif
  34
  35 /*----- Header files ------------------------------------------------------*/
  36
  37 #include <mLib/bits.h>
  38
  39 /*----- Constant tables ---------------------------------------------------*/
  40
  41 extern const octet rijndael_s[256];
  42 extern const octet rijndael_si[256];
  43 extern const uint32 rijndael_t[4][256];
  44 extern const uint32 rijndael_ti[4][256];
  45 extern const uint32 rijndael_u[4][256];
  46 extern const octet rijndael_rcon[];
  47
  48 #define S rijndael_s
  49 #define SI rijndael_si
  50 #define T rijndael_t
  51 #define TI rijndael_ti
  52 #define U rijndael_u
  53 #define RCON rijndael_rcon
  54
  55 /*----- Handy macros ------------------------------------------------------*/
  56
  57 #define SUB(s, a, b, c, d)                                              \
  58   (s[U8((a) >> 24)] << 24 | s[U8((b) >> 16)] << 16 |                    \
  59    s[U8((c) >>  8)] <<  8 | s[U8((d) >>  0)] <<  0)
  60
  61 #define MIX(t, a, b, c, d)                                              \
  62    (t[0][U8((a) >> 24)] ^ t[1][U8((b) >> 16)] ^                         \
  63     t[2][U8((c) >>  8)] ^ t[3][U8((d) >>  0)])
  64
  65 /*----- That's all, folks -------------------------------------------------*/
  66
  67 #ifdef __cplusplus
  68   }
  69 #endif
  70
  71 #endif