/* set this=O */
public void inf()
{
INF = true;
x.zero();
y.zero();
z.zero();
}
/* construct this from x - but set to O if not on curve */
public ECP2(FP2 ix)
{
x = new FP2(ix);
y = new FP2(1);
z = new FP2(1);
FP2 rhs = RHS(x);
if (rhs.sqrt())
{
y.copy(rhs);
INF = false;
}
else
{
x.zero();
INF = true;
}
}
/* construct this from (x,y) - but set to O if not on curve */
public ECP2(FP2 ix, FP2 iy)
{
x = new FP2(ix);
y = new FP2(iy);
z = new FP2(1);
FP2 rhs = RHS(x);
FP2 y2 = new FP2(y);
y2.sqr();
if (y2.Equals(rhs))
{
INF = false;
}
else
{
x.zero();
INF = true;
}
}
/* set this=0 */
public void zero()
{
a.zero();
b.zero();
}