3 * Exponentiation operations for elliptic curves
5 * (c) 2001 Straylight/Edgeware
8 /*----- Licensing notice --------------------------------------------------*
10 * This file is part of Catacomb.
12 * Catacomb is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU Library General Public License as
14 * published by the Free Software Foundation; either version 2 of the
15 * License, or (at your option) any later version.
17 * Catacomb is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU Library General Public License for more details.
22 * You should have received a copy of the GNU Library General Public
23 * License along with Catacomb; if not, write to the Free
24 * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
28 #ifndef CATACOMB_EC_EXP_H
29 #define CATACOMB_EC_EXP_H
35 /*----- Exponentation definitions -----------------------------------------*/
39 #define EXP_COPY(d, p) do { \
41 (d).x = (d).y = (d).z = MP_NEW; \
43 (d).x = MP_COPY((p).x); \
44 (d).y = MP_COPY((p).y); \
45 (d).z = (p).z ? MP_COPY((p).z) : MP_NEW; \
48 #define EXP_DROP(x) EC_DESTROY(&(x))
50 #define EXP_MUL(a, x) EC_ADD(c, &(a), &(a), &(x))
51 #define EXP_SQR(a) EC_DBL(c, &(a), &(a))
54 #define EXP_SETMUL(d, x, y) do { \
56 EC_ADD(c, &(d), &(x), &(y)); \
58 #define EXP_SETSQR(d, x) do { \
60 EC_DBL(c, &(d), &(x)); \
65 /*----- That's all, folks -------------------------------------------------*/