SecT233K1Point
using Org.BouncyCastle.Math.Raw;
namespace Org.BouncyCastle.Math.EC.Custom.Sec
{
internal class SecT233K1Point : AbstractF2mPoint
{
public override ECFieldElement YCoord {
get {
ECFieldElement rawXCoord = base.RawXCoord;
ECFieldElement rawYCoord = base.RawYCoord;
if (base.IsInfinity || rawXCoord.IsZero)
return rawYCoord;
ECFieldElement eCFieldElement = rawYCoord.Add(rawXCoord).Multiply(rawXCoord);
ECFieldElement eCFieldElement2 = base.RawZCoords[0];
if (!eCFieldElement2.IsOne)
eCFieldElement = eCFieldElement.Divide(eCFieldElement2);
return eCFieldElement;
}
}
protected internal override bool CompressionYTilde {
get {
ECFieldElement rawXCoord = base.RawXCoord;
if (rawXCoord.IsZero)
return false;
return base.RawYCoord.TestBitZero() != rawXCoord.TestBitZero();
}
}
internal SecT233K1Point(ECCurve curve, ECFieldElement x, ECFieldElement y)
: base(curve, x, y)
{
}
internal SecT233K1Point(ECCurve curve, ECFieldElement x, ECFieldElement y, ECFieldElement[] zs)
: base(curve, x, y, zs)
{
}
protected override ECPoint Detach()
{
return new SecT233K1Point(null, AffineXCoord, AffineYCoord);
}
public override ECPoint Add(ECPoint b)
{
if (base.IsInfinity)
return b;
if (b.IsInfinity)
return this;
ECCurve curve = Curve;
SecT233FieldElement secT233FieldElement = (SecT233FieldElement)base.RawXCoord;
SecT233FieldElement secT233FieldElement2 = (SecT233FieldElement)b.RawXCoord;
if (secT233FieldElement.IsZero) {
if (secT233FieldElement2.IsZero)
return curve.Infinity;
return b.Add(this);
}
SecT233FieldElement secT233FieldElement3 = (SecT233FieldElement)base.RawYCoord;
SecT233FieldElement secT233FieldElement4 = (SecT233FieldElement)base.RawZCoords[0];
SecT233FieldElement secT233FieldElement5 = (SecT233FieldElement)b.RawYCoord;
SecT233FieldElement secT233FieldElement6 = (SecT233FieldElement)b.RawZCoords[0];
ulong[] array = Nat256.CreateExt64();
ulong[] array2 = Nat256.Create64();
ulong[] array3 = Nat256.Create64();
ulong[] array4 = Nat256.Create64();
bool isOne = secT233FieldElement4.IsOne;
if (isOne) {
Nat256.Copy64(secT233FieldElement2.x, array2);
Nat256.Copy64(secT233FieldElement5.x, array3);
} else {
SecT233Field.Multiply(secT233FieldElement2.x, secT233FieldElement4.x, array2);
SecT233Field.Multiply(secT233FieldElement5.x, secT233FieldElement4.x, array3);
}
bool isOne2 = secT233FieldElement6.IsOne;
if (isOne2) {
Nat256.Copy64(secT233FieldElement.x, array4);
Nat256.Copy64(secT233FieldElement3.x, array);
} else {
SecT233Field.Multiply(secT233FieldElement.x, secT233FieldElement6.x, array4);
SecT233Field.Multiply(secT233FieldElement3.x, secT233FieldElement6.x, array);
}
SecT233Field.AddTo(array, array3);
SecT233Field.Add(array4, array2, array);
if (Nat256.IsZero64(array)) {
if (Nat256.IsZero64(array3))
return Twice();
return curve.Infinity;
}
if (secT233FieldElement2.IsZero) {
ECPoint eCPoint = Normalize();
secT233FieldElement = (SecT233FieldElement)eCPoint.XCoord;
ECFieldElement yCoord = eCPoint.YCoord;
ECFieldElement b2 = secT233FieldElement5;
ECFieldElement eCFieldElement = yCoord.Add(b2).Divide(secT233FieldElement);
ECFieldElement eCFieldElement2 = eCFieldElement.Square().Add(eCFieldElement).Add(secT233FieldElement);
if (eCFieldElement2.IsZero)
return new SecT233K1Point(curve, eCFieldElement2, curve.B);
ECFieldElement y = eCFieldElement.Multiply(secT233FieldElement.Add(eCFieldElement2)).Add(eCFieldElement2).Add(yCoord)
.Divide(eCFieldElement2)
.Add(eCFieldElement2);
ECFieldElement eCFieldElement3 = curve.FromBigInteger(BigInteger.One);
return new SecT233K1Point(curve, eCFieldElement2, y, new ECFieldElement[1] {
eCFieldElement3
});
}
SecT233Field.Square(array, array);
SecT233Field.Multiply(array4, array3, array4);
SecT233Field.Multiply(array2, array3, array2);
ulong[] array5 = array4;
SecT233Field.Multiply(array5, array2, array5);
if (Nat256.IsZero64(array5))
return new SecT233K1Point(curve, new SecT233FieldElement(array5), curve.B);
ulong[] array6 = array3;
SecT233Field.Multiply(array6, array, array6);
if (!isOne2)
SecT233Field.Multiply(array6, secT233FieldElement6.x, array6);
ulong[] array7 = array2;
SecT233Field.AddTo(array, array7);
SecT233Field.SquareExt(array7, array);
SecT233Field.Add(secT233FieldElement3.x, secT233FieldElement4.x, array7);
SecT233Field.MultiplyAddToExt(array6, array7, array);
SecT233Field.Reduce(array, array7);
if (!isOne)
SecT233Field.Multiply(array6, secT233FieldElement4.x, array6);
return new SecT233K1Point(curve, new SecT233FieldElement(array5), new SecT233FieldElement(array7), new ECFieldElement[1] {
new SecT233FieldElement(array6)
});
}
public override ECPoint Twice()
{
if (base.IsInfinity)
return this;
ECCurve curve = Curve;
ECFieldElement rawXCoord = base.RawXCoord;
if (rawXCoord.IsZero)
return curve.Infinity;
ECFieldElement rawYCoord = base.RawYCoord;
ECFieldElement eCFieldElement = base.RawZCoords[0];
bool isOne = eCFieldElement.IsOne;
ECFieldElement eCFieldElement2 = isOne ? eCFieldElement : eCFieldElement.Square();
ECFieldElement eCFieldElement3 = (!isOne) ? rawYCoord.Add(eCFieldElement).Multiply(rawYCoord) : rawYCoord.Square().Add(rawYCoord);
if (eCFieldElement3.IsZero)
return new SecT233K1Point(curve, eCFieldElement3, curve.B);
ECFieldElement eCFieldElement4 = eCFieldElement3.Square();
ECFieldElement eCFieldElement5 = isOne ? eCFieldElement3 : eCFieldElement3.Multiply(eCFieldElement2);
ECFieldElement eCFieldElement6 = rawYCoord.Add(rawXCoord).Square();
ECFieldElement b = isOne ? eCFieldElement : eCFieldElement2.Square();
ECFieldElement y = eCFieldElement6.Add(eCFieldElement3).Add(eCFieldElement2).Multiply(eCFieldElement6)
.Add(b)
.Add(eCFieldElement4)
.Add(eCFieldElement5);
return new SecT233K1Point(curve, eCFieldElement4, y, new ECFieldElement[1] {
eCFieldElement5
});
}
public override ECPoint TwicePlus(ECPoint b)
{
if (base.IsInfinity)
return b;
if (b.IsInfinity)
return Twice();
ECCurve curve = Curve;
ECFieldElement rawXCoord = base.RawXCoord;
if (rawXCoord.IsZero)
return b;
ECFieldElement rawXCoord2 = b.RawXCoord;
ECFieldElement eCFieldElement = b.RawZCoords[0];
if (rawXCoord2.IsZero || !eCFieldElement.IsOne)
return Twice().Add(b);
ECFieldElement rawYCoord = base.RawYCoord;
ECFieldElement eCFieldElement2 = base.RawZCoords[0];
ECFieldElement rawYCoord2 = b.RawYCoord;
ECFieldElement x = rawXCoord.Square();
ECFieldElement eCFieldElement3 = rawYCoord.Square();
ECFieldElement eCFieldElement4 = eCFieldElement2.Square();
ECFieldElement b2 = rawYCoord.Multiply(eCFieldElement2);
ECFieldElement b3 = eCFieldElement3.Add(b2);
ECFieldElement eCFieldElement5 = rawYCoord2.AddOne();
ECFieldElement eCFieldElement6 = eCFieldElement5.Multiply(eCFieldElement4).Add(eCFieldElement3).MultiplyPlusProduct(b3, x, eCFieldElement4);
ECFieldElement eCFieldElement7 = rawXCoord2.Multiply(eCFieldElement4);
ECFieldElement eCFieldElement8 = eCFieldElement7.Add(b3).Square();
if (eCFieldElement8.IsZero) {
if (eCFieldElement6.IsZero)
return b.Twice();
return curve.Infinity;
}
if (eCFieldElement6.IsZero)
return new SecT233K1Point(curve, eCFieldElement6, curve.B);
ECFieldElement x2 = eCFieldElement6.Square().Multiply(eCFieldElement7);
ECFieldElement eCFieldElement9 = eCFieldElement6.Multiply(eCFieldElement8).Multiply(eCFieldElement4);
ECFieldElement y = eCFieldElement6.Add(eCFieldElement8).Square().MultiplyPlusProduct(b3, eCFieldElement5, eCFieldElement9);
return new SecT233K1Point(curve, x2, y, new ECFieldElement[1] {
eCFieldElement9
});
}
public override ECPoint Negate()
{
if (base.IsInfinity)
return this;
ECFieldElement rawXCoord = base.RawXCoord;
if (rawXCoord.IsZero)
return this;
ECFieldElement rawYCoord = base.RawYCoord;
ECFieldElement eCFieldElement = base.RawZCoords[0];
return new SecT233K1Point(Curve, rawXCoord, rawYCoord.Add(eCFieldElement), new ECFieldElement[1] {
eCFieldElement
});
}
}
}