public override ECFieldElement Sqrt()
{
uint[] array = x;
if (Nat.IsZero(17, array) || Nat.IsOne(17, array))
{
return(this);
}
uint[] z = Nat.Create(17);
uint[] array2 = Nat.Create(17);
SecP521R1Field.SquareN(array, 519, z);
SecP521R1Field.Square(z, array2);
return((!Nat.Eq(17, array, array2)) ? null : new SecP521R1FieldElement(z));
}
public override ECFieldElement Sqrt()
{
uint[] x = this.x;
if (Nat.IsZero(0x11, x) || Nat.IsOne(0x11, x))
{
return(this);
}
uint[] z = Nat.Create(0x11);
uint[] numArray3 = Nat.Create(0x11);
SecP521R1Field.SquareN(x, 0x207, z);
SecP521R1Field.Square(z, numArray3);
return(!Nat.Eq(0x11, x, numArray3) ? null : new SecP521R1FieldElement(z));
}
/**
* return a sqrt root - the routine verifies that the calculation returns the right value - if
* none exists it returns null.
*/
public override ECFieldElement Sqrt()
{
// Raise this element to the exponent 2^519
uint[] x1 = this.x;
if (Nat.IsZero(17, x1) || Nat.IsOne(17, x1))
{
return(this);
}
uint[] t1 = Nat.Create(17);
uint[] t2 = Nat.Create(17);
SecP521R1Field.SquareN(x1, 519, t1);
SecP521R1Field.Square(t1, t2);
return(Nat.Eq(17, x1, t2) ? new SecP521R1FieldElement(t1) : null);
}