code: public void derEncode(OutputStream out) throws IOException {
          if (signedCert == null)
              throw new IOException("Null certificate to encode");
          out.write(signedCert.clone());
      }
docs: DER encode this object onto an output stream.
  Implements the <code>DerEncoder</code> interface.
  
  @param out the output stream on which to write the DER encoding.
  
  @exception IOException on encoding error.