SecP192K1Point
using Org.BouncyCastle.Math.Raw;
namespace Org.BouncyCastle.Math.EC.Custom.Sec
{
internal class SecP192K1Point : AbstractFpPoint
{
internal SecP192K1Point(ECCurve curve, ECFieldElement x, ECFieldElement y)
: base(curve, x, y)
{
}
internal SecP192K1Point(ECCurve curve, ECFieldElement x, ECFieldElement y, ECFieldElement[] zs)
: base(curve, x, y, zs)
{
}
protected override ECPoint Detach()
{
return new SecP192K1Point(null, AffineXCoord, AffineYCoord);
}
public override ECPoint Add(ECPoint b)
{
if (base.IsInfinity)
return b;
if (b.IsInfinity)
return this;
if (this == b)
return Twice();
ECCurve curve = Curve;
SecP192K1FieldElement secP192K1FieldElement = (SecP192K1FieldElement)base.RawXCoord;
SecP192K1FieldElement secP192K1FieldElement2 = (SecP192K1FieldElement)base.RawYCoord;
SecP192K1FieldElement secP192K1FieldElement3 = (SecP192K1FieldElement)b.RawXCoord;
SecP192K1FieldElement secP192K1FieldElement4 = (SecP192K1FieldElement)b.RawYCoord;
SecP192K1FieldElement secP192K1FieldElement5 = (SecP192K1FieldElement)base.RawZCoords[0];
SecP192K1FieldElement secP192K1FieldElement6 = (SecP192K1FieldElement)b.RawZCoords[0];
uint[] array = Nat192.CreateExt();
uint[] array2 = Nat192.Create();
uint[] array3 = Nat192.Create();
uint[] array4 = Nat192.Create();
bool isOne = secP192K1FieldElement5.IsOne;
uint[] array5;
uint[] array6;
if (isOne) {
array5 = secP192K1FieldElement3.x;
array6 = secP192K1FieldElement4.x;
} else {
array6 = array3;
SecP192K1Field.Square(secP192K1FieldElement5.x, array6);
array5 = array2;
SecP192K1Field.Multiply(array6, secP192K1FieldElement3.x, array5);
SecP192K1Field.Multiply(array6, secP192K1FieldElement5.x, array6);
SecP192K1Field.Multiply(array6, secP192K1FieldElement4.x, array6);
}
bool isOne2 = secP192K1FieldElement6.IsOne;
uint[] array7;
uint[] array8;
if (isOne2) {
array7 = secP192K1FieldElement.x;
array8 = secP192K1FieldElement2.x;
} else {
array8 = array4;
SecP192K1Field.Square(secP192K1FieldElement6.x, array8);
array7 = array;
SecP192K1Field.Multiply(array8, secP192K1FieldElement.x, array7);
SecP192K1Field.Multiply(array8, secP192K1FieldElement6.x, array8);
SecP192K1Field.Multiply(array8, secP192K1FieldElement2.x, array8);
}
uint[] array9 = Nat192.Create();
SecP192K1Field.Subtract(array7, array5, array9);
uint[] array10 = array2;
SecP192K1Field.Subtract(array8, array6, array10);
if (Nat192.IsZero(array9)) {
if (Nat192.IsZero(array10))
return Twice();
return curve.Infinity;
}
uint[] array11 = array3;
SecP192K1Field.Square(array9, array11);
uint[] array12 = Nat192.Create();
SecP192K1Field.Multiply(array11, array9, array12);
uint[] array13 = array3;
SecP192K1Field.Multiply(array11, array7, array13);
SecP192K1Field.Negate(array12, array12);
Nat192.Mul(array8, array12, array);
SecP192K1Field.Reduce32(Nat192.AddBothTo(array13, array13, array12), array12);
SecP192K1FieldElement secP192K1FieldElement7 = new SecP192K1FieldElement(array4);
SecP192K1Field.Square(array10, secP192K1FieldElement7.x);
SecP192K1Field.Subtract(secP192K1FieldElement7.x, array12, secP192K1FieldElement7.x);
SecP192K1FieldElement secP192K1FieldElement8 = new SecP192K1FieldElement(array12);
SecP192K1Field.Subtract(array13, secP192K1FieldElement7.x, secP192K1FieldElement8.x);
SecP192K1Field.MultiplyAddToExt(secP192K1FieldElement8.x, array10, array);
SecP192K1Field.Reduce(array, secP192K1FieldElement8.x);
SecP192K1FieldElement secP192K1FieldElement9 = new SecP192K1FieldElement(array9);
if (!isOne)
SecP192K1Field.Multiply(secP192K1FieldElement9.x, secP192K1FieldElement5.x, secP192K1FieldElement9.x);
if (!isOne2)
SecP192K1Field.Multiply(secP192K1FieldElement9.x, secP192K1FieldElement6.x, secP192K1FieldElement9.x);
ECFieldElement[] zs = new ECFieldElement[1] {
secP192K1FieldElement9
};
return new SecP192K1Point(curve, secP192K1FieldElement7, secP192K1FieldElement8, zs);
}
public override ECPoint Twice()
{
if (base.IsInfinity)
return this;
ECCurve curve = Curve;
SecP192K1FieldElement secP192K1FieldElement = (SecP192K1FieldElement)base.RawYCoord;
if (secP192K1FieldElement.IsZero)
return curve.Infinity;
SecP192K1FieldElement secP192K1FieldElement2 = (SecP192K1FieldElement)base.RawXCoord;
SecP192K1FieldElement secP192K1FieldElement3 = (SecP192K1FieldElement)base.RawZCoords[0];
uint[] array = Nat192.Create();
SecP192K1Field.Square(secP192K1FieldElement.x, array);
uint[] array2 = Nat192.Create();
SecP192K1Field.Square(array, array2);
uint[] array3 = Nat192.Create();
SecP192K1Field.Square(secP192K1FieldElement2.x, array3);
SecP192K1Field.Reduce32(Nat192.AddBothTo(array3, array3, array3), array3);
uint[] array4 = array;
SecP192K1Field.Multiply(array, secP192K1FieldElement2.x, array4);
SecP192K1Field.Reduce32(Nat.ShiftUpBits(6, array4, 2, 0), array4);
uint[] array5 = Nat192.Create();
SecP192K1Field.Reduce32(Nat.ShiftUpBits(6, array2, 3, 0, array5), array5);
SecP192K1FieldElement secP192K1FieldElement4 = new SecP192K1FieldElement(array2);
SecP192K1Field.Square(array3, secP192K1FieldElement4.x);
SecP192K1Field.Subtract(secP192K1FieldElement4.x, array4, secP192K1FieldElement4.x);
SecP192K1Field.Subtract(secP192K1FieldElement4.x, array4, secP192K1FieldElement4.x);
SecP192K1FieldElement secP192K1FieldElement5 = new SecP192K1FieldElement(array4);
SecP192K1Field.Subtract(array4, secP192K1FieldElement4.x, secP192K1FieldElement5.x);
SecP192K1Field.Multiply(secP192K1FieldElement5.x, array3, secP192K1FieldElement5.x);
SecP192K1Field.Subtract(secP192K1FieldElement5.x, array5, secP192K1FieldElement5.x);
SecP192K1FieldElement secP192K1FieldElement6 = new SecP192K1FieldElement(array3);
SecP192K1Field.Twice(secP192K1FieldElement.x, secP192K1FieldElement6.x);
if (!secP192K1FieldElement3.IsOne)
SecP192K1Field.Multiply(secP192K1FieldElement6.x, secP192K1FieldElement3.x, secP192K1FieldElement6.x);
return new SecP192K1Point(curve, secP192K1FieldElement4, secP192K1FieldElement5, new ECFieldElement[1] {
secP192K1FieldElement6
});
}
public override ECPoint TwicePlus(ECPoint b)
{
if (this == b)
return ThreeTimes();
if (base.IsInfinity)
return b;
if (b.IsInfinity)
return Twice();
if (base.RawYCoord.IsZero)
return b;
return Twice().Add(b);
}
public override ECPoint ThreeTimes()
{
if (base.IsInfinity || base.RawYCoord.IsZero)
return this;
return Twice().Add(this);
}
public override ECPoint Negate()
{
if (base.IsInfinity)
return this;
return new SecP192K1Point(Curve, base.RawXCoord, base.RawYCoord.Negate(), base.RawZCoords);
}
}
}