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();
SecP160R2Field.Square(secP160R2FieldElement.x, array);
uint[] array2 = Nat160.Create();
SecP160R2Field.Square(array, array2);
uint[] array3 = Nat160.Create();
SecP160R2Field.Square(secP160R2FieldElement2.x, array3);
uint x = Nat160.AddBothTo(array3, array3, array3);
SecP160R2Field.Reduce32(x, array3);
uint[] array4 = array;
SecP160R2Field.Multiply(array, secP160R2FieldElement2.x, array4);
x = Nat.ShiftUpBits(5, array4, 2, 0u);
SecP160R2Field.Reduce32(x, array4);
uint[] array5 = Nat160.Create();
x = Nat.ShiftUpBits(5, array2, 3, 0u, array5);
SecP160R2Field.Reduce32(x, array5);
SecP160R2FieldElement secP160R2FieldElement4 = new SecP160R2FieldElement(array2);
SecP160R2Field.Square(array3, secP160R2FieldElement4.x);
SecP160R2Field.Subtract(secP160R2FieldElement4.x, array4, secP160R2FieldElement4.x);
SecP160R2Field.Subtract(secP160R2FieldElement4.x, array4, secP160R2FieldElement4.x);
SecP160R2FieldElement secP160R2FieldElement5 = new SecP160R2FieldElement(array4);
SecP160R2Field.Subtract(array4, secP160R2FieldElement4.x, secP160R2FieldElement5.x);
SecP160R2Field.Multiply(secP160R2FieldElement5.x, array3, secP160R2FieldElement5.x);
SecP160R2Field.Subtract(secP160R2FieldElement5.x, array5, secP160R2FieldElement5.x);
SecP160R2FieldElement secP160R2FieldElement6 = new SecP160R2FieldElement(array3);
SecP160R2Field.Twice(secP160R2FieldElement.x, secP160R2FieldElement6.x);
if (!secP160R2FieldElement3.IsOne)
{
SecP160R2Field.Multiply(secP160R2FieldElement6.x, secP160R2FieldElement3.x, secP160R2FieldElement6.x);
}
return(new SecP160K1Point(curve, secP160R2FieldElement4, secP160R2FieldElement5, new ECFieldElement[1]
{
secP160R2FieldElement6
}, base.IsCompressed));
}
public override ECFieldElement Subtract(ECFieldElement b)
{
uint[] z = Nat160.Create();
SecP160R2Field.Subtract(x, ((SecP160R2FieldElement)b).x, z);
return(new SecP160R2FieldElement(z));
}
public override ECPoint Add(ECPoint b)
{
if (base.IsInfinity)
{
return(b);
}
if (b.IsInfinity)
{
return(this);
}
if (this == b)
{
return(Twice());
}
ECCurve curve = Curve;
SecP160R2FieldElement secP160R2FieldElement = (SecP160R2FieldElement)base.RawXCoord;
SecP160R2FieldElement secP160R2FieldElement2 = (SecP160R2FieldElement)base.RawYCoord;
SecP160R2FieldElement secP160R2FieldElement3 = (SecP160R2FieldElement)b.RawXCoord;
SecP160R2FieldElement secP160R2FieldElement4 = (SecP160R2FieldElement)b.RawYCoord;
SecP160R2FieldElement secP160R2FieldElement5 = (SecP160R2FieldElement)base.RawZCoords[0];
SecP160R2FieldElement secP160R2FieldElement6 = (SecP160R2FieldElement)b.RawZCoords[0];
uint[] array = Nat160.CreateExt();
uint[] array2 = Nat160.Create();
uint[] array3 = Nat160.Create();
uint[] array4 = Nat160.Create();
bool isOne = secP160R2FieldElement5.IsOne;
uint[] array5;
uint[] array6;
if (isOne)
{
array5 = secP160R2FieldElement3.x;
array6 = secP160R2FieldElement4.x;
}
else
{
array6 = array3;
SecP160R2Field.Square(secP160R2FieldElement5.x, array6);
array5 = array2;
SecP160R2Field.Multiply(array6, secP160R2FieldElement3.x, array5);
SecP160R2Field.Multiply(array6, secP160R2FieldElement5.x, array6);
SecP160R2Field.Multiply(array6, secP160R2FieldElement4.x, array6);
}
bool isOne2 = secP160R2FieldElement6.IsOne;
uint[] array7;
uint[] array8;
if (isOne2)
{
array7 = secP160R2FieldElement.x;
array8 = secP160R2FieldElement2.x;
}
else
{
array8 = array4;
SecP160R2Field.Square(secP160R2FieldElement6.x, array8);
array7 = array;
SecP160R2Field.Multiply(array8, secP160R2FieldElement.x, array7);
SecP160R2Field.Multiply(array8, secP160R2FieldElement6.x, array8);
SecP160R2Field.Multiply(array8, secP160R2FieldElement2.x, array8);
}
uint[] array9 = Nat160.Create();
SecP160R2Field.Subtract(array7, array5, array9);
uint[] array10 = array2;
SecP160R2Field.Subtract(array8, array6, array10);
if (Nat160.IsZero(array9))
{
if (Nat160.IsZero(array10))
{
return(Twice());
}
return(curve.Infinity);
}
uint[] array11 = array3;
SecP160R2Field.Square(array9, array11);
uint[] array12 = Nat160.Create();
SecP160R2Field.Multiply(array11, array9, array12);
uint[] array13 = array3;
SecP160R2Field.Multiply(array11, array7, array13);
SecP160R2Field.Negate(array12, array12);
Nat160.Mul(array8, array12, array);
uint x = Nat160.AddBothTo(array13, array13, array12);
SecP160R2Field.Reduce32(x, array12);
SecP160R2FieldElement secP160R2FieldElement7 = new SecP160R2FieldElement(array4);
SecP160R2Field.Square(array10, secP160R2FieldElement7.x);
SecP160R2Field.Subtract(secP160R2FieldElement7.x, array12, secP160R2FieldElement7.x);
SecP160R2FieldElement secP160R2FieldElement8 = new SecP160R2FieldElement(array12);
SecP160R2Field.Subtract(array13, secP160R2FieldElement7.x, secP160R2FieldElement8.x);
SecP160R2Field.MultiplyAddToExt(secP160R2FieldElement8.x, array10, array);
SecP160R2Field.Reduce(array, secP160R2FieldElement8.x);
SecP160R2FieldElement secP160R2FieldElement9 = new SecP160R2FieldElement(array9);
if (!isOne)
{
SecP160R2Field.Multiply(secP160R2FieldElement9.x, secP160R2FieldElement5.x, secP160R2FieldElement9.x);
}
if (!isOne2)
{
SecP160R2Field.Multiply(secP160R2FieldElement9.x, secP160R2FieldElement6.x, secP160R2FieldElement9.x);
}
ECFieldElement[] zs = new ECFieldElement[1]
{
secP160R2FieldElement9
};
return(new SecP160K1Point(curve, secP160R2FieldElement7, secP160R2FieldElement8, zs, base.IsCompressed));
}