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

   1 /* -*-c-*-
   2  *
   3  * $Id: ec-exp.h,v 1.1 2002/01/13 13:48:44 mdw Exp $
   4  *
   5  * Exponentiation operations for elliptic curves
   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 /*----- Revision history --------------------------------------------------*
  31  *
  32  * $Log: ec-exp.h,v $
  33  * Revision 1.1  2002/01/13 13:48:44  mdw
  34  * Further progress.
  35  *
  36  */
  37
  38 #ifndef CATACOMB_EC_EXP_H
  39 #define CATACOMB_EC_EXP_H
  40
  41 #ifdef __cplusplus
  42   extern "C" {
  43 #endif
  44
  45 /*----- Exponentation definitions -----------------------------------------*/
  46
  47 #define EXP_TYPE ec
  48
  49 #define EXP_COPY(d, x) do {                                             \
  50   d.x = MP_COPY(x.x);                                                   \
  51   d.y = MP_COPY(x.y);                                                   \
  52   d.z = x.z ? MP_COPY(x.x) : MP_NEW;                                    \
  53 } while (0)
  54 #define EXP_DROP(x) EC_DESTROY(c, &x)
  55
  56 #define EXP_MUL(a, x) EC_ADD(c, &a, &a, &x)
  57 #define EXP_SQR(a) EC_DBL(c, &a, &a);
  58
  59 #define EXP_SETMUL(d, x, y) do {                                        \
  60   EC_CREATE(&d);                                                        \
  61   EC_ADD(c, &d, &x, &y);                                                \
  62 } while (0)
  63 #define EXP_SETSQR(d, x) do {                                           \
  64   EC_CREATE(&d);                                                        \
  65   EC_DBL(c, &d, &x);                                                    \
  66 } while (0)
  67
  68 #include "exp.h"
  69
  70 /*----- That's all, folks -------------------------------------------------*/
  71
  72 #ifdef __cplusplus
  73   }
  74 #endif
  75
  76 #endif