/* -*-c-*-
*
- * $Id: ec-bin.c,v 1.8 2004/04/03 03:32:05 mdw Exp $
+ * $Id$
*
* Arithmetic for elliptic curves over binary fields
*
* MA 02111-1307, USA.
*/
-/*----- Revision history --------------------------------------------------*
- *
- * $Log: ec-bin.c,v $
- * Revision 1.8 2004/04/03 03:32:05 mdw
- * General robustification.
- *
- * Revision 1.7 2004/04/01 21:28:41 mdw
- * Normal basis support (translates to poly basis internally). Rewrite
- * EC and prime group table generators in awk, so that they can reuse data
- * for repeated constants.
- *
- * Revision 1.6 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 1.5 2004/03/27 17:54:11 mdw
- * Standard curves and curve checking.
- *
- * Revision 1.4 2004/03/23 15:19:32 mdw
- * Test elliptic curves more thoroughly.
- *
- * Revision 1.3 2004/03/22 02:19:09 mdw
- * Rationalise the sliding-window threshold. Drop guarantee that right
- * arguments to EC @add@ are canonical, and fix up projective implementations
- * to cope.
- *
- * Revision 1.2 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.
- *
- */
-
/*----- Header files ------------------------------------------------------*/
#include <mLib/sub.h>
#include "ec.h"
-
-/*----- Data structures ---------------------------------------------------*/
-
-typedef struct ecctx {
- ec_curve c;
- mp *bb;
-} ecctx;
+#include "ec-guts.h"
/*----- Main code ---------------------------------------------------------*/
EC_SETINF(d);
else {
field *f = c->f;
- ecctx *cc = (ecctx *)c;
+ ecctx_bin *cc = (ecctx_bin *)c;
mp *dx, *dy, *dz, *u, *v;
dy = F_SQR(f, MP_NEW, a->z); /* %$z^2$% */
static void ecdestroy(ec_curve *c)
{
- ecctx *cc = (ecctx *)c;
+ ecctx_bin *cc = (ecctx_bin *)c;
MP_DROP(cc->c.a);
MP_DROP(cc->c.b);
if (cc->bb) MP_DROP(cc->bb);
ec_curve *ec_bin(field *f, mp *a, mp *b)
{
- ecctx *cc = CREATE(ecctx);
+ ecctx_bin *cc = CREATE(ecctx_bin);
cc->c.ops = &ec_binops;
cc->c.f = f;
cc->c.a = F_IN(f, MP_NEW, a);
ec_curve *ec_binproj(field *f, mp *a, mp *b)
{
- ecctx *cc = CREATE(ecctx);
+ ecctx_bin *cc = CREATE(ecctx_bin);
cc->c.ops = &ec_binprojops;
cc->c.f = f;
cc->c.a = F_IN(f, MP_NEW, a);
}
static const ec_ops ec_binops = {
+ "bin",
ecdestroy, ec_stdsamep, ec_idin, ec_idout, ec_idfix,
ecfind, ecneg, ecadd, ec_stdsub, ecdbl, eccheck
};
static const ec_ops ec_binprojops = {
+ "binproj",
ecdestroy, ec_stdsamep, ec_projin, ec_projout, ec_projfix,
ecfind, ecprojneg, ecprojadd, ec_stdsub, ecprojdbl, ecprojcheck
};