X-Git-Url: https://git.distorted.org.uk/u/mdw/catacomb/blobdiff_plain/e9926004f7caf25abbfb87ebd921a01e6bf865dc..c3caa2face1cda7002eb58245ad75865bf437455:/gfreduce-exp.h

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+/* -*-c-*-
+ *
+ * $Id: gfreduce-exp.h,v 1.2 2004/03/21 22:52:06 mdw Exp $
+ *
+ * Exponentiation operations for binary field reduction
+ *
+ * (c) 2004 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.
+ */
+
+/*----- Revision history --------------------------------------------------* 
+ *
+ * $Log: gfreduce-exp.h,v $
+ * Revision 1.2  2004/03/21 22:52:06  mdw
+ * Merge and close elliptic curve branch.
+ *
+ * Revision 1.1.2.1  2004/03/21 22:39:46  mdw
+ * Elliptic curves on binary fields work.
+ *
+ */
+
+#ifndef CATACOMB_GFREDUCE_EXP_H
+#define CATACOMB_GFREDUCE_EXP_H
+
+#ifdef __cplusplus
+  extern "C" {
+#endif
+
+/*----- Exponentiation definitions ----------------------------------------*/
+
+#define EXP_TYPE mp *
+
+#define EXP_COPY(d, x) d = MP_COPY(x)
+#define EXP_DROP(x) MP_DROP(x)
+
+#define EXP_MUL(a, x) do {						\
+  mp *t = gf_mul(spare, a, x);						\
+  spare = a;								\
+  a = gfreduce_do(gr, t, t);						\
+} while (0)
+
+#define EXP_SQR(a) do {							\
+  mp *t = gf_sqr(spare, a);						\
+  spare = a;								\
+  a = gfreduce_do(gr, t, t);						\
+} while (0)
+
+#define EXP_FIX(x)
+
+#define EXP_SETMUL(d, x, y) do {					\
+  d = gf_mul(MP_NEW, x, y);						\
+  d = gfreduce_do(gr, d, d);						\
+} while (0)
+
+#define EXP_SETSQR(d, x) do {						\
+  d = gf_sqr(MP_NEW, x);						\
+  d = gfreduce_do(gr, d, d);						\
+} while (0)
+
+#include "exp.h"
+
+/*----- That's all, folks -------------------------------------------------*/
+
+#ifdef __cplusplus
+  }
+#endif
+
+#endif