public override ECPoint Twice() { if (base.IsInfinity) { return(this); } ECCurve curve = Curve; SecP160R2FieldElement secP160R2FieldElement = (SecP160R2FieldElement)base.RawYCoord; if (secP160R2FieldElement.IsZero) { return(curve.Infinity); } SecP160R2FieldElement secP160R2FieldElement2 = (SecP160R2FieldElement)base.RawXCoord; SecP160R2FieldElement secP160R2FieldElement3 = (SecP160R2FieldElement)base.RawZCoords[0]; uint[] array = Nat160.Create(); uint[] array2 = Nat160.Create(); uint[] array3 = Nat160.Create(); SecP160R2Field.Square(secP160R2FieldElement.x, array3); uint[] array4 = Nat160.Create(); SecP160R2Field.Square(array3, array4); bool isOne = secP160R2FieldElement3.IsOne; uint[] array5 = secP160R2FieldElement3.x; if (!isOne) { array5 = array2; SecP160R2Field.Square(secP160R2FieldElement3.x, array5); } SecP160R2Field.Subtract(secP160R2FieldElement2.x, array5, array); uint[] array6 = array2; SecP160R2Field.Add(secP160R2FieldElement2.x, array5, array6); SecP160R2Field.Multiply(array6, array, array6); uint x = Nat160.AddBothTo(array6, array6, array6); SecP160R2Field.Reduce32(x, array6); uint[] array7 = array3; SecP160R2Field.Multiply(array3, secP160R2FieldElement2.x, array7); x = Nat.ShiftUpBits(5, array7, 2, 0u); SecP160R2Field.Reduce32(x, array7); x = Nat.ShiftUpBits(5, array4, 3, 0u, array); SecP160R2Field.Reduce32(x, array); SecP160R2FieldElement secP160R2FieldElement4 = new SecP160R2FieldElement(array4); SecP160R2Field.Square(array6, secP160R2FieldElement4.x); SecP160R2Field.Subtract(secP160R2FieldElement4.x, array7, secP160R2FieldElement4.x); SecP160R2Field.Subtract(secP160R2FieldElement4.x, array7, secP160R2FieldElement4.x); SecP160R2FieldElement secP160R2FieldElement5 = new SecP160R2FieldElement(array7); SecP160R2Field.Subtract(array7, secP160R2FieldElement4.x, secP160R2FieldElement5.x); SecP160R2Field.Multiply(secP160R2FieldElement5.x, array6, secP160R2FieldElement5.x); SecP160R2Field.Subtract(secP160R2FieldElement5.x, array, secP160R2FieldElement5.x); SecP160R2FieldElement secP160R2FieldElement6 = new SecP160R2FieldElement(array6); SecP160R2Field.Twice(secP160R2FieldElement.x, secP160R2FieldElement6.x); if (!isOne) { SecP160R2Field.Multiply(secP160R2FieldElement6.x, secP160R2FieldElement3.x, secP160R2FieldElement6.x); } return(new SecP160R2Point(curve, secP160R2FieldElement4, secP160R2FieldElement5, new ECFieldElement[1] { secP160R2FieldElement6 }, base.IsCompressed)); }