public void ToByteArrayTest()
{
ECDomainParameters domain = ECDomains.GetDomainParameter(ECDomainNames.secp192r1);
ECGroup group = domain.Group;
ECPoint p = domain.Group.FiniteField.GetInfinityPoint(group);
ECPoint g = domain.G.Export();
byte[] tmp = p.ToByteArray(true);
Assert.IsTrue(tmp.Length == 1, "#1");
Assert.IsTrue(tmp[0] == 0, "#2");
p = new ECPoint(group, tmp);
Assert.IsTrue(p.IsInifinity(), "#3");
tmp = domain.G.ToByteArray(false);
Assert.IsTrue(tmp.Length == ((domain.Bits >> 3) + ((domain.Bits & 7) == 0 ? 0 : 1)) * 2 + 1, "#4");
p = new ECPoint(group, tmp).Export();
Assert.IsTrue(p.X.CompareTo(g.X) == 0, "#5");
Assert.IsTrue(p.Y.CompareTo(g.Y) == 0, "#6");
tmp = domain.G.ToByteArray(true);
Assert.IsTrue(tmp.Length == ((domain.Bits >> 3) + ((domain.Bits & 7) == 0 ? 0 : 1)) + 1, "#7");
p = new ECPoint(group, tmp).Export();
Assert.IsTrue(p.X.CompareTo(g.X) == 0, "#8");
Assert.IsTrue(p.Y.CompareTo(g.Y) == 0, "#9");
}
public virtual ECPoint ExportECPoint(Number x, Number y, Number z, ECGroup group)
{
if (z.IsOne())
{
return(new ECPoint(group, x, y, z));
}
Number iz = Invert(z);
Number z2 = Multiply(iz, iz);
return(new ECPoint(group, Multiply(x, z2), Multiply(y, Multiply(z2, iz)), Number.One));
}
public static GroupElement CreateGroupElement(Group Gq, string value)
{
if (Gq is SubgroupGroup)
{
return(Gq.CreateGroupElement(HexToBytes(value)));
}
else
{
ECGroup ecGq = Gq as ECGroup;
string[] point = value.Split(',');
return(ecGq.CreateGroupElement(HexToBytes(point[0]), HexToBytes(point[1])));
}
}
void PointCompressTest(int bits, ECGroup group, ECPoint p, int repeats, string name)
{
int bytes = (bits >> 3) + ((bits & 7) == 0 ? 0 : 1) + 1;
for (int i = 0; i < repeats; i++)
{
byte[] tmp = p.ToByteArray(true);
Assert.IsTrue(tmp.Length == bytes, name + " #1");
ECPoint x = new ECPoint(group, tmp).Export();
ECPoint p2 = p.Export();
Assert.IsTrue(x.X.CompareTo(p2.X) == 0, name + " #2");
Assert.IsTrue(x.Y.CompareTo(p2.Y) == 0, name + " #3");
p = p.Multiply(Number.CreateRandomElement(group.P));
}
}
public override ECPoint ExportECPoint(Number x, Number y, Number z, ECGroup group)
{
if (montOne == null)
{
montOne = ToElement(Number.One);
}
if (z.CompareTo(montOne) == 0)
{
return(new ECPoint(group, Multiply(x, Number.One), Multiply(y, Number.One), Number.One));
}
Number izm = Invert(z);
Number iz = Multiply(izm, Number.One);
Number z2 = Multiply(iz, izm);
return(new ECPoint(group, Multiply(x, z2), Multiply(y, (Multiply(z2, izm))), Number.One));
}
public override ECPoint GetInfinityPoint(ECGroup group)
{
return(new ECPoint(group, PADDED_ZERO, PADDED_ZERO, PADDED_ZERO));
}
public virtual ECPoint GetInfinityPoint(ECGroup group)
{
return(new ECPoint(group, Number.Zero, Number.Zero, Number.Zero));
}
