Add cyclic group abstraction, with test code. Separate off exponentation

[u/mdw/catacomb] / ptab.h

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+/* -*-c-*-
+ *
+ * $Id: ptab.h,v 1.1 2004/04/01 12:50:09 mdw Exp $
+ *
+ * Table of standard prime groups
+ *
+ * (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: ptab.h,v $
+ * Revision 1.1  2004/04/01 12:50:09  mdw
+ * Add cyclic group abstraction, with test code.  Separate off exponentation
+ * functions for better static linking.  Fix a buttload of bugs on the way.
+ * Generally ensure that negative exponents do inversion correctly.  Add
+ * table of standard prime-field subgroups.  (Binary field subgroups are
+ * currently unimplemented but easy to add if anyone ever finds a good one.)
+ *
+ */
+
+#ifndef CATACOMB_PTAB_H
+#define CATACOMB_PTAB_H
+
+#ifdef __cplusplus
+  extern "C" {
+#endif
+
+/*----- Header files ------------------------------------------------------*/
+
+#include "mp.h"
+
+/*----- Data structures ---------------------------------------------------*/
+
+typedef struct pdata {
+  mp p;                                        /* The modulus */
+  mp q;                                        /* The group order */
+  mp g;                                        /* The generator */
+} pdata;
+
+typedef struct pentry {
+  const char *name;
+  pdata *data;
+} pentry;
+
+/*----- Global variables --------------------------------------------------*/
+
+extern const pentry ptab[];
+
+/*----- That's all, folks -------------------------------------------------*/
+
+#ifdef __cplusplus
+  }
+#endif
+
+#endif