public byte[] ToBytes(EcPointFormat format = EcPointFormat.Mixed, int l = -1)
{
if (Inf)
{
throw new InvalidOperationException();
}
var xb = X.ToByteArrayUBe(l);
if (format == EcPointFormat.Compressed)
{
var r = new byte[xb.Length + 1];
xb.CopyTo(r, 1);
r[0] = Y.IsEven ? (byte)2 : (byte)3;
return(r);
}
else
{
var yb = Y.ToByteArrayUBe(l);
if (l == -1)
{
return(ToBytes(format, Math.Max(xb.Length, yb.Length)));
}
var r = new byte[l * 2 + 1];
r[0] = format == EcPointFormat.Uncompressed ? (byte)4 : Y.IsEven ? (byte)6 : (byte)7;
xb.CopyTo(r, 1);
yb.CopyTo(r, l + 1);
return(r);
}
}
public byte[] ToBytes(AsymmetricAlgorithm a, EcPointFormat format = EcPointFormat.Compressed) => ToBytes(format, (a.KeySize + 7) / 8);
