public static byte[] EncodePoint(ECPoint Q)
{
/*if (!Q.isCompressed())
* Q=new ECPoint.F2m(Q.getCurve(),Q.getX(),Q.getY(),true);
*
* byte[] bytes=Q.getEncoded();
*
* if (bytes[0]==0x02)
* bytes[bytes.length-1]&=0xFE;
* else if (bytes[0]==0x02)
* bytes[bytes.length-1]|=0x01;
*
* return Arrays.copyOfRange(bytes, 1, bytes.length);*/
Q = Q.Normalize();
ECFieldElement x = Q.AffineXCoord;
byte[] bytes = x.GetEncoded();
if (!x.IsZero)
{
ECFieldElement z = Q.AffineYCoord.Divide(x);
if (Trace(z).IsOne)
{
bytes[bytes.Length - 1] |= 0x01;
}
else
{
bytes[bytes.Length - 1] &= 0xFE;
}
}
return(bytes);
}
public static void WriteECFieldElement(ECFieldElement x, Stream output)
{
TlsUtilities.WriteOpaque8(x.GetEncoded(), output);
}
private void AddFieldElement(IDigest digest, ECFieldElement v)
{
byte[] p = v.GetEncoded();
digest.BlockUpdate(p, 0, p.Length);
}