git.distorted.org.uk Git - u/mdw/catacomb/blob - gfreduce-exp.h

   1 /* -*-c-*-
   2  *
   3  * $Id: gfreduce-exp.h,v 1.1.2.1 2004/03/21 22:39:46 mdw Exp $
   4  *
   5  * Exponentiation operations for binary field reduction
   6  *
   7  * (c) 2004 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: gfreduce-exp.h,v $
  33  * Revision 1.1.2.1  2004/03/21 22:39:46  mdw
  34  * Elliptic curves on binary fields work.
  35  *
  36  */
  37
  38 #ifndef CATACOMB_GFREDUCE_EXP_H
  39 #define CATACOMB_GFREDUCE_EXP_H
  40
  41 #ifdef __cplusplus
  42   extern "C" {
  43 #endif
  44
  45 /*----- Exponentiation definitions ----------------------------------------*/
  46
  47 #define EXP_TYPE mp *
  48
  49 #define EXP_COPY(d, x) d = MP_COPY(x)
  50 #define EXP_DROP(x) MP_DROP(x)
  51
  52 #define EXP_MUL(a, x) do {                                              \
  53   mp *t = gf_mul(spare, a, x);                                          \
  54   spare = a;                                                            \
  55   a = gfreduce_do(gr, t, t);                                            \
  56 } while (0)
  57
  58 #define EXP_SQR(a) do {                                                 \
  59   mp *t = gf_sqr(spare, a);                                             \
  60   spare = a;                                                            \
  61   a = gfreduce_do(gr, t, t);                                            \
  62 } while (0)
  63
  64 #define EXP_FIX(x)
  65
  66 #define EXP_SETMUL(d, x, y) do {                                        \
  67   d = gf_mul(MP_NEW, x, y);                                             \
  68   d = gfreduce_do(gr, d, d);                                            \
  69 } while (0)
  70
  71 #define EXP_SETSQR(d, x) do {                                           \
  72   d = gf_sqr(MP_NEW, x);                                                \
  73   d = gfreduce_do(gr, d, d);                                            \
  74 } while (0)
  75
  76 #include "exp.h"
  77
  78 /*----- That's all, folks -------------------------------------------------*/
  79
  80 #ifdef __cplusplus
  81   }
  82 #endif
  83
  84 #endif