def fill_signed_info(self, signed_info):
        """
        Fills the SignedInfo node
        :param signed_info: SignedInfo node
        :type signed_info: lxml.etree.Element
        :return: None
        """
        for reference in signed_info.findall(
                'ds:Reference', namespaces=constants.NS_MAP
        ):
            self.calculate_reference(reference, True)