@classmethod
def read_tls_file(cls, file_path):
    """
        Shortcut method for reading a TLS file into a byte string.

        :param file_path: The location of the TLS certificate/key file
        :type file_path: str
        """
    if not file_path:
        return None
    with open(file_path, 'rb') as f:
        return f.read()
