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

   1 /* -*-c-*-
   2  *
   3  * $Id: gfreduce-exp.h,v 1.2 2004/03/21 22:52:06 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 1.2  2004/03/21 22:52:06  mdw
  34  * Merge and close elliptic curve branch.
  35  *
  36  * Revision 1.1.2.1  2004/03/21 22:39:46  mdw
  37  * Elliptic curves on binary fields work.
  38  *
  39  */
  40
  41 #ifndef CATACOMB_GFREDUCE_EXP_H
  42 #define CATACOMB_GFREDUCE_EXP_H
  43
  44 #ifdef __cplusplus
  45   extern "C" {
  46 #endif
  47
  48 /*----- Exponentiation definitions ----------------------------------------*/
  49
  50 #define EXP_TYPE mp *
  51
  52 #define EXP_COPY(d, x) d = MP_COPY(x)
  53 #define EXP_DROP(x) MP_DROP(x)
  54
  55 #define EXP_MUL(a, x) do {                                              \
  56   mp *t = gf_mul(spare, a, x);                                          \
  57   spare = a;                                                            \
  58   a = gfreduce_do(gr, t, t);                                            \
  59 } while (0)
  60
  61 #define EXP_SQR(a) do {                                                 \
  62   mp *t = gf_sqr(spare, a);                                             \
  63   spare = a;                                                            \
  64   a = gfreduce_do(gr, t, t);                                            \
  65 } while (0)
  66
  67 #define EXP_FIX(x)
  68
  69 #define EXP_SETMUL(d, x, y) do {                                        \
  70   d = gf_mul(MP_NEW, x, y);                                             \
  71   d = gfreduce_do(gr, d, d);                                            \
  72 } while (0)
  73
  74 #define EXP_SETSQR(d, x) do {                                           \
  75   d = gf_sqr(MP_NEW, x);                                                \
  76   d = gfreduce_do(gr, d, d);                                            \
  77 } while (0)
  78
  79 #include "exp.h"
  80
  81 /*----- That's all, folks -------------------------------------------------*/
  82
  83 #ifdef __cplusplus
  84   }
  85 #endif
  86
  87 #endif