public override ECPoint Add(ECPoint b)
{
if (base.IsInfinity)
{
return(b);
}
if (b.IsInfinity)
{
return(this);
}
if (this == b)
{
return(Twice());
}
ECCurve curve = Curve;
SecP224K1FieldElement secP224K1FieldElement = (SecP224K1FieldElement)base.RawXCoord;
SecP224K1FieldElement secP224K1FieldElement2 = (SecP224K1FieldElement)base.RawYCoord;
SecP224K1FieldElement secP224K1FieldElement3 = (SecP224K1FieldElement)b.RawXCoord;
SecP224K1FieldElement secP224K1FieldElement4 = (SecP224K1FieldElement)b.RawYCoord;
SecP224K1FieldElement secP224K1FieldElement5 = (SecP224K1FieldElement)base.RawZCoords[0];
SecP224K1FieldElement secP224K1FieldElement6 = (SecP224K1FieldElement)b.RawZCoords[0];
uint[] array = Nat224.CreateExt();
uint[] array2 = Nat224.Create();
uint[] array3 = Nat224.Create();
uint[] array4 = Nat224.Create();
bool isOne = secP224K1FieldElement5.IsOne;
uint[] array5;
uint[] array6;
if (isOne)
{
array5 = secP224K1FieldElement3.x;
array6 = secP224K1FieldElement4.x;
}
else
{
array6 = array3;
SecP224K1Field.Square(secP224K1FieldElement5.x, array6);
array5 = array2;
SecP224K1Field.Multiply(array6, secP224K1FieldElement3.x, array5);
SecP224K1Field.Multiply(array6, secP224K1FieldElement5.x, array6);
SecP224K1Field.Multiply(array6, secP224K1FieldElement4.x, array6);
}
bool isOne2 = secP224K1FieldElement6.IsOne;
uint[] array7;
uint[] array8;
if (isOne2)
{
array7 = secP224K1FieldElement.x;
array8 = secP224K1FieldElement2.x;
}
else
{
array8 = array4;
SecP224K1Field.Square(secP224K1FieldElement6.x, array8);
array7 = array;
SecP224K1Field.Multiply(array8, secP224K1FieldElement.x, array7);
SecP224K1Field.Multiply(array8, secP224K1FieldElement6.x, array8);
SecP224K1Field.Multiply(array8, secP224K1FieldElement2.x, array8);
}
uint[] array9 = Nat224.Create();
SecP224K1Field.Subtract(array7, array5, array9);
uint[] array10 = array2;
SecP224K1Field.Subtract(array8, array6, array10);
if (Nat224.IsZero(array9))
{
if (Nat224.IsZero(array10))
{
return(Twice());
}
return(curve.Infinity);
}
uint[] array11 = array3;
SecP224K1Field.Square(array9, array11);
uint[] array12 = Nat224.Create();
SecP224K1Field.Multiply(array11, array9, array12);
uint[] array13 = array3;
SecP224K1Field.Multiply(array11, array7, array13);
SecP224K1Field.Negate(array12, array12);
Nat224.Mul(array8, array12, array);
uint x = Nat224.AddBothTo(array13, array13, array12);
SecP224K1Field.Reduce32(x, array12);
SecP224K1FieldElement secP224K1FieldElement7 = new SecP224K1FieldElement(array4);
SecP224K1Field.Square(array10, secP224K1FieldElement7.x);
SecP224K1Field.Subtract(secP224K1FieldElement7.x, array12, secP224K1FieldElement7.x);
SecP224K1FieldElement secP224K1FieldElement8 = new SecP224K1FieldElement(array12);
SecP224K1Field.Subtract(array13, secP224K1FieldElement7.x, secP224K1FieldElement8.x);
SecP224K1Field.MultiplyAddToExt(secP224K1FieldElement8.x, array10, array);
SecP224K1Field.Reduce(array, secP224K1FieldElement8.x);
SecP224K1FieldElement secP224K1FieldElement9 = new SecP224K1FieldElement(array9);
if (!isOne)
{
SecP224K1Field.Multiply(secP224K1FieldElement9.x, secP224K1FieldElement5.x, secP224K1FieldElement9.x);
}
if (!isOne2)
{
SecP224K1Field.Multiply(secP224K1FieldElement9.x, secP224K1FieldElement6.x, secP224K1FieldElement9.x);
}
ECFieldElement[] zs = new ECFieldElement[1]
{
secP224K1FieldElement9
};
return(new SecP224K1Point(curve, secP224K1FieldElement7, secP224K1FieldElement8, zs, base.IsCompressed));
}
public override ECFieldElement Negate()
{
uint[] z = Nat224.Create();
SecP224K1Field.Negate(x, z);
return(new SecP224K1FieldElement(z));
}