Builds the Signature of the SAML Response.
        :param response_data: The Response parameters
        :type response_data: dict

        :param sign_algorithm: Signature algorithm method
        :type sign_algorithm: string

def add_response_signature(self, response_data, sign_algorithm=OneLogin_Saml2_Constants.RSA_SHA1):
        """
        Builds the Signature of the SAML Response.
        :param response_data: The Response parameters
        :type response_data: dict

        :param sign_algorithm: Signature algorithm method
        :type sign_algorithm: string
        """
        return self.__build_signature(response_data, 'SAMLResponse', sign_algorithm)