public override ECPoint Add(ECPoint b)
{
if (base.IsInfinity)
{
return(b);
}
if (b.IsInfinity)
{
return(this);
}
if (this == b)
{
return(Twice());
}
ECCurve curve = Curve;
SecP160R1FieldElement secP160R1FieldElement = (SecP160R1FieldElement)base.RawXCoord;
SecP160R1FieldElement secP160R1FieldElement2 = (SecP160R1FieldElement)base.RawYCoord;
SecP160R1FieldElement secP160R1FieldElement3 = (SecP160R1FieldElement)b.RawXCoord;
SecP160R1FieldElement secP160R1FieldElement4 = (SecP160R1FieldElement)b.RawYCoord;
SecP160R1FieldElement secP160R1FieldElement5 = (SecP160R1FieldElement)base.RawZCoords[0];
SecP160R1FieldElement secP160R1FieldElement6 = (SecP160R1FieldElement)b.RawZCoords[0];
uint[] array = Nat160.CreateExt();
uint[] array2 = Nat160.Create();
uint[] array3 = Nat160.Create();
uint[] array4 = Nat160.Create();
bool isOne = secP160R1FieldElement5.IsOne;
uint[] array5;
uint[] array6;
if (isOne)
{
array5 = secP160R1FieldElement3.x;
array6 = secP160R1FieldElement4.x;
}
else
{
array6 = array3;
SecP160R1Field.Square(secP160R1FieldElement5.x, array6);
array5 = array2;
SecP160R1Field.Multiply(array6, secP160R1FieldElement3.x, array5);
SecP160R1Field.Multiply(array6, secP160R1FieldElement5.x, array6);
SecP160R1Field.Multiply(array6, secP160R1FieldElement4.x, array6);
}
bool isOne2 = secP160R1FieldElement6.IsOne;
uint[] array7;
uint[] array8;
if (isOne2)
{
array7 = secP160R1FieldElement.x;
array8 = secP160R1FieldElement2.x;
}
else
{
array8 = array4;
SecP160R1Field.Square(secP160R1FieldElement6.x, array8);
array7 = array;
SecP160R1Field.Multiply(array8, secP160R1FieldElement.x, array7);
SecP160R1Field.Multiply(array8, secP160R1FieldElement6.x, array8);
SecP160R1Field.Multiply(array8, secP160R1FieldElement2.x, array8);
}
uint[] array9 = Nat160.Create();
SecP160R1Field.Subtract(array7, array5, array9);
uint[] array10 = array2;
SecP160R1Field.Subtract(array8, array6, array10);
if (Nat160.IsZero(array9))
{
if (Nat160.IsZero(array10))
{
return(Twice());
}
return(curve.Infinity);
}
uint[] array11 = array3;
SecP160R1Field.Square(array9, array11);
uint[] array12 = Nat160.Create();
SecP160R1Field.Multiply(array11, array9, array12);
uint[] array13 = array3;
SecP160R1Field.Multiply(array11, array7, array13);
SecP160R1Field.Negate(array12, array12);
Nat160.Mul(array8, array12, array);
uint x = Nat160.AddBothTo(array13, array13, array12);
SecP160R1Field.Reduce32(x, array12);
SecP160R1FieldElement secP160R1FieldElement7 = new SecP160R1FieldElement(array4);
SecP160R1Field.Square(array10, secP160R1FieldElement7.x);
SecP160R1Field.Subtract(secP160R1FieldElement7.x, array12, secP160R1FieldElement7.x);
SecP160R1FieldElement secP160R1FieldElement8 = new SecP160R1FieldElement(array12);
SecP160R1Field.Subtract(array13, secP160R1FieldElement7.x, secP160R1FieldElement8.x);
SecP160R1Field.MultiplyAddToExt(secP160R1FieldElement8.x, array10, array);
SecP160R1Field.Reduce(array, secP160R1FieldElement8.x);
SecP160R1FieldElement secP160R1FieldElement9 = new SecP160R1FieldElement(array9);
if (!isOne)
{
SecP160R1Field.Multiply(secP160R1FieldElement9.x, secP160R1FieldElement5.x, secP160R1FieldElement9.x);
}
if (!isOne2)
{
SecP160R1Field.Multiply(secP160R1FieldElement9.x, secP160R1FieldElement6.x, secP160R1FieldElement9.x);
}
ECFieldElement[] zs = new ECFieldElement[1]
{
secP160R1FieldElement9
};
return(new SecP160R1Point(curve, secP160R1FieldElement7, secP160R1FieldElement8, zs, base.IsCompressed));
}
