def file_data_status(ca_status):
    """
    Verify the CA status based in the existent files.

    :param ca_status: current ``ca_status`` file dictionary:
        ``ownca.utils.ownca_directory``
    :type ca_status: dict, required

    :return: True, False or None
    :rtype: bool/None
    """
    key = ca_status['key']
    cert = ca_status['certificate']
    if key == cert and key is True:
        return True
    elif key != cert and key or cert:
        return False
    else:
        return None
