def process_sasl_auth(self, stream, element):
        """Process incoming <sasl:auth/> element.

        [receiving entity only]
        """
        if self.authenticator:
            logger.debug("Authentication already started")
            return False

        password_db = self.settings["password_database"]
        mechanism = element.get("mechanism")
        if not mechanism:
            stream.send_stream_error("bad-format")
            raise FatalStreamError("<sasl:auth/> with no mechanism")

        stream.auth_method_used = mechanism
        self.authenticator = sasl.server_authenticator_factory(mechanism,
                                                                password_db)

        content = element.text.encode("us-ascii")
        ret = self.authenticator.start(stream.auth_properties,
                                                a2b_base64(content))

        if isinstance(ret, sasl.Success):
            element = ElementTree.Element(SUCCESS_TAG)
            element.text = ret.encode()
        elif isinstance(ret, sasl.Challenge):
            element = ElementTree.Element(CHALLENGE_TAG)
            element.text = ret.encode()
        else:
            element = ElementTree.Element(FAILURE_TAG)
            ElementTree.SubElement(element, SASL_QNP + ret.reason)

        stream.write_element(element)

        if isinstance(ret, sasl.Success):
            self._handle_auth_success(stream, ret)
        elif isinstance(ret, sasl.Failure):
            raise SASLAuthenticationFailed("SASL authentication failed: {0}"
                                                            .format(ret.reason))
        return True
def process_sasl_auth(self, stream, element):
        """Process incoming <sasl:auth/> element.

        [receiving entity only]
        """
        if self.authenticator:
            logger.debug("Authentication already started")
            return False

        password_db = self.settings["password_database"]
        mechanism = element.get("mechanism")
        if not mechanism:
            stream.send_stream_error("bad-format")
            raise FatalStreamError("<sasl:auth/> with no mechanism")

        stream.auth_method_used = mechanism
        self.authenticator = sasl.server_authenticator_factory(mechanism,
                                                                password_db)

        content = element.text.encode("us-ascii")
        ret = self.authenticator.start(stream.auth_properties,
                                                a2b_base64(content))

        if isinstance(ret, sasl.Success):
            element = ElementTree.Element(SUCCESS_TAG)
            element.text = ret.encode()
        elif isinstance(ret, sasl.Challenge):
            element = ElementTree.Element(CHALLENGE_TAG)
            element.text = ret.encode()
        else:
            element = ElementTree.Element(FAILURE_TAG)
            ElementTree.SubElement(element, SASL_QNP + ret.reason)

        stream.write_element(element)

        if isinstance(ret, sasl.Success):
            self._handle_auth_success(stream, ret)
        elif isinstance(ret, sasl.Failure):
            raise SASLAuthenticationFailed("SASL authentication failed: {0}"
                                                            .format(ret.reason))
        return True
def process_sasl_auth ( self , stream , element ) : if self . authenticator : logger . debug ( "Authentication already started" ) return False password_db = self . settings [ "password_database" ] mechanism = element . get ( "mechanism" ) if not mechanism : stream . send_stream_error ( "bad-format" ) raise FatalStreamError ( "<sasl:auth/> with no mechanism" ) stream . auth_method_used = mechanism self . authenticator = sasl . server_authenticator_factory ( mechanism , password_db ) content = element . text . encode ( "us-ascii" ) ret = self . authenticator . start ( stream . auth_properties , a2b_base64 ( content ) ) if isinstance ( ret , sasl . Success ) : element = ElementTree . Element ( SUCCESS_TAG ) element . text = ret . encode ( ) elif isinstance ( ret , sasl . Challenge ) : element = ElementTree . Element ( CHALLENGE_TAG ) element . text = ret . encode ( ) else : element = ElementTree . Element ( FAILURE_TAG ) ElementTree . SubElement ( element , SASL_QNP + ret . reason ) stream . write_element ( element ) if isinstance ( ret , sasl . Success ) : self . _handle_auth_success ( stream , ret ) elif isinstance ( ret , sasl . Failure ) : raise SASLAuthenticationFailed ( "SASL authentication failed: {0}" . format ( ret . reason ) ) return True
Process incoming <sasl:auth/> element.

        [receiving entity only]
Process incoming <sasl : auth / > element .