3 * $Id: ec-exp.h,v 1.4 2004/03/22 02:19:10 mdw Exp $
5 * Exponentiation operations for elliptic curves
7 * (c) 2001 Straylight/Edgeware
10 /*----- Licensing notice --------------------------------------------------*
12 * This file is part of Catacomb.
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.
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.
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,
30 /*----- Revision history --------------------------------------------------*
33 * Revision 1.4 2004/03/22 02:19:10 mdw
34 * Rationalise the sliding-window threshold. Drop guarantee that right
35 * arguments to EC @add@ are canonical, and fix up projective implementations
38 * Revision 1.3 2004/03/21 22:52:06 mdw
39 * Merge and close elliptic curve branch.
41 * Revision 1.2.4.1 2004/03/20 00:13:31 mdw
42 * Projective coordinates for prime curves
44 * Revision 1.2 2003/05/15 23:25:59 mdw
45 * Make elliptic curve stuff build.
47 * Revision 1.1 2002/01/13 13:48:44 mdw
52 #ifndef CATACOMB_EC_EXP_H
53 #define CATACOMB_EC_EXP_H
59 /*----- Exponentation definitions -----------------------------------------*/
63 #define EXP_COPY(d, p) do { \
64 (d).x = MP_COPY((p).x); \
65 (d).y = MP_COPY((p).y); \
66 (d).z = (p).z ? MP_COPY((p).z) : MP_NEW; \
68 #define EXP_DROP(x) EC_DESTROY(&(x))
70 #define EXP_MUL(a, x) EC_ADD(c, &(a), &(a), &(x))
71 #define EXP_SQR(a) EC_DBL(c, &(a), &(a));
74 #define EXP_SETMUL(d, x, y) do { \
76 EC_ADD(c, &(d), &(x), &(y)); \
78 #define EXP_SETSQR(d, x) do { \
80 EC_DBL(c, &(d), &(x)); \
85 /*----- That's all, folks -------------------------------------------------*/