/* -*-c-*-
*
- * $Id: f-prime.c,v 1.1 2001/04/29 18:12:33 mdw Exp $
+ * $Id: f-prime.c,v 1.3 2003/05/15 23:25:59 mdw Exp $
*
* Prime fields with Montgomery arithmetic
*
/*----- Revision history --------------------------------------------------*
*
* $Log: f-prime.c,v $
+ * Revision 1.3 2003/05/15 23:25:59 mdw
+ * Make elliptic curve stuff build.
+ *
+ * Revision 1.2 2002/01/13 13:48:44 mdw
+ * Further progress.
+ *
* Revision 1.1 2001/04/29 18:12:33 mdw
* Prototype version.
*
return (mpmont_reduce(&f->mm, d, x));
}
+static mp *fneg(field *ff, mp *d, mp *x)
+{
+ fctx *f = (fctx *)ff;
+ return (mp_sub(d, f->mm.m, x));
+}
+
static mp *fadd(field *ff, mp *d, mp *x, mp *y)
{
return (mp_add(d, x, y));
static mp *finv(field *ff, mp *d, mp *x)
{
fctx *f = (fctx *)ff;
- d = mpmont_reduce(&f->mm, x);
+ d = mpmont_reduce(&f->mm, d, x);
mp_gcd(0, 0, &d, f->mm.m, d);
return (mpmont_mul(&f->mm, d, d, f->mm.r2));
}
static mp *fdbl(field *ff, mp *d, mp *x)
{
- fctx *f = (fctx *)ff;
+/* fctx *f = (fctx *)ff; */
return (mp_lsl(d, x, 1));
}
static mp *ftpl(field *ff, mp *d, mp *x)
{
- fctx *f = (fctx *)ff;
+/* fctx *f = (fctx *)ff; */
MP_DEST(d, MP_LEN(x) + 1, x->f);
MPX_UMULN(d->v, d->vl, x->v, x->vl, 3);
return (d);
static mp *fsqrt(field *ff, mp *d, mp *x)
{
fctx *f = (fctx *)ff;
- d = mpmont_reduce(&f->mm, x);
+ d = mpmont_reduce(&f->mm, d, x);
d = mp_modsqrt(d, d, f->mm.m);
return (mpmont_mul(&f->mm, d, d, f->mm.r2));
}
static field_ops fops = {
fdestroy,
fin, fout,
- fadd, fsub, fmul, fsqr, finv, freduce,
+ fneg, fadd, fsub, fmul, fsqr, finv, freduce,
fdbl, ftpl, fsqrt
};
field *field_prime(mp *p)
{
- ftcx *f = CREATE(fctx);
+ fctx *f = CREATE(fctx);
f->f.ops = &fops;
mpmont_create(&f->mm, p);
- f->zero = MP_ZERO;
- f->one = &f->mm.r;
+ f->f.zero = MP_ZERO;
+ f->f.one = f->mm.r;
return (&f->f);
}