/* -*-c-*-
*
- * $Id: ec.h,v 1.9 2004/04/01 12:50:09 mdw Exp $
+ * $Id$
*
* Elliptic curve definitions
*
* (c) 2001 Straylight/Edgeware
*/
-/*----- Licensing notice --------------------------------------------------*
+/*----- Licensing notice --------------------------------------------------*
*
* This file is part of Catacomb.
*
* 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: ec.h,v $
- * Revision 1.9 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.)
- *
- * Revision 1.8 2004/03/27 17:54:11 mdw
- * Standard curves and curve checking.
- *
- * Revision 1.7 2004/03/23 15:19:32 mdw
- * Test elliptic curves more thoroughly.
- *
- * Revision 1.6 2004/03/22 02:19:10 mdw
- * Rationalise the sliding-window threshold. Drop guarantee that right
- * arguments to EC @add@ are canonical, and fix up projective implementations
- * to cope.
- *
- * Revision 1.5 2004/03/21 22:52:06 mdw
- * Merge and close elliptic curve branch.
- *
- * Revision 1.4.4.3 2004/03/21 22:39:46 mdw
- * Elliptic curves on binary fields work.
- *
- * Revision 1.4.4.2 2004/03/20 00:13:31 mdw
- * Projective coordinates for prime curves
- *
- * Revision 1.4.4.1 2003/06/10 13:43:53 mdw
- * Simple (non-projective) curves over prime fields now seem to work.
- *
- * Revision 1.4 2003/05/15 23:25:59 mdw
- * Make elliptic curve stuff build.
- *
- * Revision 1.3 2002/01/13 13:48:44 mdw
- * Further progress.
- *
- * Revision 1.2 2001/05/07 17:29:44 mdw
- * Treat projective coordinates as an internal representation. Various
- * minor interface changes.
- *
- * Revision 1.1 2001/04/29 18:12:33 mdw
- * Prototype version.
- *
- */
-
#ifndef CATACOMB_EC_H
#define CATACOMB_EC_H
*/
typedef struct ec_ops {
+ const char *name;
void (*destroy)(ec_curve */*c*/);
int (*samep)(ec_curve */*c*/, ec_curve */*d*/);
ec *(*in)(ec_curve */*c*/, ec */*d*/, const ec */*p*/);
int (*check)(ec_curve */*c*/, const ec */*p*/);
} ec_ops;
+#define EC_NAME(c) (c)->ops->name
+
#define EC_SAMEP(c, d) (c)->ops->samep((c), (d))
#define EC_IN(c, d, p) (c)->ops->in((c), (d), (p))
#define EC_OUT(c, d, p) (c)->ops->out((c), (d), (p))
* Arguments: @field *f@ = the underlying field for this elliptic curve
* @mp *a, *b@ = the coefficients for this curve
*
- * Returns: A pointer to the curve.
+ * Returns: A pointer to the curve, or null.
*
* Use: Creates a curve structure for an elliptic curve defined over
* a prime field. The @primeproj@ variant uses projective
* Arguments: @field *f@ = the underlying field for this elliptic curve
* @mp *a, *b@ = the coefficients for this curve
*
- * Returns: A pointer to the curve.
+ * Returns: A pointer to the curve, or null.
*
* Use: Creates a curve structure for an elliptic curve defined over
* a binary field. The @binproj@ variant uses projective
* Use: Parses an elliptic curve description, which has the form
*
* * a field description
- * * an optional `/'
+ * * an optional `;'
* * `prime', `primeproj', `bin', or `binproj'
* * an optional `:'
* * the %$a$% parameter
* information in @ei@. This has the form
*
* * elliptic curve description
- * * optional `/'
+ * * optional `;'
* * common point
* * optional `:'
* * group order
extern int ec_infoparse(qd_parse */*qd*/, ec_info */*ei*/);
+/* --- @ec_infofromdata@ --- *
+ *
+ * Arguments: @ec_info *ei@ = where to write the information
+ * @ecdata *ed@ = raw data
+ *
+ * Returns: ---
+ *
+ * Use: Loads elliptic curve information about one of the standard
+ * curves.
+ */
+
+struct ecdata;
+extern void ec_infofromdata(ec_info */*ei*/, struct ecdata */*ed*/);
+
/* --- @ec_getinfo@ --- *
*
* Arguments: @ec_info *ei@ = where to write the information