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

   1 /* -*-c-*-
   2  *
   3  * $Id: ec-exp.h,v 1.6 2004/04/08 01:36:15 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 #ifndef CATACOMB_EC_EXP_H
  31 #define CATACOMB_EC_EXP_H
  32
  33 #ifdef __cplusplus
  34   extern "C" {
  35 #endif
  36
  37 /*----- Exponentation definitions -----------------------------------------*/
  38
  39 #define EXP_TYPE ec
  40
  41 #define EXP_COPY(d, p) do {                                             \
  42   (d).x = MP_COPY((p).x);                                               \
  43   (d).y = MP_COPY((p).y);                                               \
  44   (d).z = (p).z ? MP_COPY((p).z) : MP_NEW;                              \
  45 } while (0)
  46 #define EXP_DROP(x) EC_DESTROY(&(x))
  47
  48 #define EXP_MUL(a, x) EC_ADD(c, &(a), &(a), &(x))
  49 #define EXP_SQR(a) EC_DBL(c, &(a), &(a))
  50 #define EXP_FIX(x)
  51
  52 #define EXP_SETMUL(d, x, y) do {                                        \
  53   EC_CREATE(&(d));                                                      \
  54   EC_ADD(c, &(d), &(x), &(y));                                          \
  55 } while (0)
  56 #define EXP_SETSQR(d, x) do {                                           \
  57   EC_CREATE(&(d));                                                      \
  58   EC_DBL(c, &(d), &(x));                                                \
  59 } while (0)
  60
  61 #include "exp.h"
  62
  63 /*----- That's all, folks -------------------------------------------------*/
  64
  65 #ifdef __cplusplus
  66   }
  67 #endif
  68
  69 #endif