public virtual Number Pow (Number x, Number y)
{
if (y.IsZero ())
return ToElement (Number.One);
if (y.IsOne ())
return x;
Number a = x;
Number b = ToElement (Number.One);
if (y.GetBit (0) == 1)
b = a;
for (int i = 1; i < y.BitCount (); i ++) {
a = Multiply (a, a);
if (y.GetBit (i) == 1)
b = Multiply (a, b);
}
return b;
}
public virtual ECPoint ExportECPoint (Number x, Number y, Number z, ECGroup group)
{
if (z.IsOne ())
return new ECPoint (group, x, y, z);
Number iz = Invert (z);
Number z2 = Multiply (iz, iz);
return new ECPoint (group, Multiply (x, z2), Multiply (y, Multiply (z2, iz)), Number.One);
}
