X-Git-Url: https://git.distorted.org.uk/u/mdw/catacomb/blobdiff_plain/ba6e6b64033b1f9de49feccb5c9cd438354481f7..0f00dc4c8eb47e67bc0f148c2dd109f73a451e0a:/math/ec-exp.h

diff --git a/math/ec-exp.h b/math/ec-exp.h
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+/* -*-c-*-
+ *
+ * Exponentiation operations for elliptic curves
+ *
+ * (c) 2001 Straylight/Edgeware
+ */
+
+/*----- Licensing notice --------------------------------------------------*
+ *
+ * This file is part of Catacomb.
+ *
+ * Catacomb is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Library General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * Catacomb is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with Catacomb; if not, write to the Free
+ * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
+ * MA 02111-1307, USA.
+ */
+
+#ifndef CATACOMB_EC_EXP_H
+#define CATACOMB_EC_EXP_H
+
+#ifdef __cplusplus
+  extern "C" {
+#endif
+
+/*----- Exponentation definitions -----------------------------------------*/
+
+#define EXP_TYPE ec
+
+#define EXP_COPY(d, p) do {						\
+  (d).x = MP_COPY((p).x);						\
+  (d).y = MP_COPY((p).y);						\
+  (d).z = (p).z ? MP_COPY((p).z) : MP_NEW;				\
+} while (0)
+#define EXP_DROP(x) EC_DESTROY(&(x))
+
+#define EXP_MUL(a, x) EC_ADD(c, &(a), &(a), &(x))
+#define EXP_SQR(a) EC_DBL(c, &(a), &(a))
+#define EXP_FIX(x)
+
+#define EXP_SETMUL(d, x, y) do {					\
+  EC_CREATE(&(d));							\
+  EC_ADD(c, &(d), &(x), &(y));						\
+} while (0)
+#define EXP_SETSQR(d, x) do {						\
+  EC_CREATE(&(d));							\
+  EC_DBL(c, &(d), &(x));						\
+} while (0)
+
+#include "exp.h"
+
+/*----- That's all, folks -------------------------------------------------*/
+
+#ifdef __cplusplus
+  }
+#endif
+
+#endif