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Commit f26df50e authored by Dave Cridland's avatar Dave Cridland Committed by Guus der Kinderen
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Undo line-ending correction 

Corrects line endings to the uncorrected state...
parent 9db375dd
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src/java/org/jivesoftware/openfire/SessionManager.java
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src/java/org/jivesoftware/openfire/session/LocalOutgoingServerSession.java
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/*
* Copyright (C) 2005-2008 Jive Software. All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.jivesoftware.openfire.session;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.Socket;
import java.nio.charset.StandardCharsets;
import java.util.*;
import java.util.regex.Pattern;
import javax.net.ssl.SSLHandshakeException;
import org.dom4j.DocumentException;
import org.dom4j.Element;
import org.dom4j.io.XMPPPacketReader;
import org.jivesoftware.openfire.Connection;
import org.jivesoftware.openfire.RoutingTable;
import org.jivesoftware.openfire.SessionManager;
import org.jivesoftware.openfire.StreamID;
import org.jivesoftware.openfire.XMPPServer;
import org.jivesoftware.openfire.auth.UnauthorizedException;
import org.jivesoftware.openfire.net.*;
import org.jivesoftware.openfire.server.OutgoingServerSocketReader;
import org.jivesoftware.openfire.server.RemoteServerManager;
import org.jivesoftware.openfire.server.ServerDialback;
import org.jivesoftware.openfire.spi.BasicStreamIDFactory;
import org.jivesoftware.util.JiveGlobals;
import org.jivesoftware.util.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlPullParserException;
import org.xmpp.packet.IQ;
import org.xmpp.packet.JID;
import org.xmpp.packet.Message;
import org.xmpp.packet.Packet;
import org.xmpp.packet.PacketError;
import org.xmpp.packet.Presence;
/**
* Server-to-server communication is done using two TCP connections between the servers. One
* connection is used for sending packets while the other connection is used for receiving packets.
* The <tt>OutgoingServerSession</tt> represents the connection to a remote server that will only
* be used for sending packets.<p>
*
* Currently only the Server Dialback method is being used for authenticating with the remote
* server. Use {@link #authenticateDomain(String, String)} to create a new connection to a remote
* server that will be used for sending packets to the remote server from the specified domain.
* Only the authenticated domains with the remote server will be able to effectively send packets
* to the remote server. The remote server will reject and close the connection if a
* non-authenticated domain tries to send a packet through this connection.<p>
*
* Once the connection has been established with the remote server and at least a domain has been
* authenticated then a new route will be added to the routing table for this connection. For
* optimization reasons the same outgoing connection will be used even if the remote server has
* several hostnames. However, different routes will be created in the routing table for each
* hostname of the remote server.
*
* @author Gaston Dombiak
*/
public class LocalOutgoingServerSession extends LocalServerSession implements OutgoingServerSession {
private static final Logger Log = LoggerFactory.getLogger(LocalOutgoingServerSession.class);
/**
* Regular expression to ensure that the hostname contains letters.
*/
private static Pattern pattern = Pattern.compile("[a-zA-Z]");
private OutgoingServerSocketReader socketReader;
private Collection<DomainPair> outgoingDomainPairs = new HashSet<>();
/**
* Authenticates the local domain to the remote domain. Once authenticated the remote domain can be expected to
* start accepting data from the local domain.
*
* This implementation will attempt to re-use an existing connection. An connection is deemed re-usable when it is either:
* <ul>
* <li>authenticated to the remote domain itself, or:</li>
* <li>authenticated to a sub- or superdomain of the remote domain AND offers dialback.</li>
* </ul>
*
* When no re-usable connection exists, a new connection will be created.
*
* DNS will be used to find hosts for the remote domain. When DNS records do not specify a port, port 5269 will be
* used unless this default is overridden by the <b>xmpp.server.socket.remotePort</b> property.
*
* @param localDomain the local domain to authenticate with the remote server.
* @param remoteDomain the remote server, to which the local domain intends to send data.
* @return True if the domain was authenticated by the remote server.
*/
public static boolean authenticateDomain(final String localDomain, final String remoteDomain) {
final Logger log = LoggerFactory.getLogger( Log.getName() + "[Authenticate local domain: '" + localDomain + "' to remote domain: '" + remoteDomain + "']" );
log.debug( "Start domain authentication ..." );
if (remoteDomain == null || remoteDomain.length() == 0 || remoteDomain.trim().indexOf(' ') > -1) {
// Do nothing if the target domain is empty, null or contains whitespaces
log.warn( "Unable to authenticate: remote domain is invalid." );
return false;
}
try {
// Check if the remote domain is in the blacklist
if (!RemoteServerManager.canAccess(remoteDomain)) {
log.info( "Unable to authenticate: Remote domain is not accessible according to our configuration (typical causes: server federation is disabled, or domain is blacklisted)." );
return false;
}
log.debug( "Searching for pre-existing outgoing sessions to the remote domain (if one exists, it will be re-used) ..." );
OutgoingServerSession session;
SessionManager sessionManager = SessionManager.getInstance();
if (sessionManager == null) {
// Server is shutting down while we are trying to create a new s2s connection
log.warn( "Unable to authenticate: a SessionManager instance is not available. This should not occur unless Openfire is starting up or shutting down." );
return false;
}
session = sessionManager.getOutgoingServerSession(remoteDomain);
if (session == null)
{
log.debug( "There are no pre-existing outgoing sessions to the remote domain itself. Searching for pre-existing outgoing sessions to super- or subdomains of the remote domain (if one exists, it might be re-usable) ..." );
for ( IncomingServerSession incomingSession : sessionManager.getIncomingServerSessions( remoteDomain ) )
{
// These are the remote domains that are allowed to send data to the local domain - expected to be sub- or superdomains of remoteDomain
for ( String otherRemoteDomain : incomingSession.getValidatedDomains() )
{
// See if there's an outgoing session to any of the (other) domains hosted by the remote domain.
session = sessionManager.getOutgoingServerSession( otherRemoteDomain );
if (session != null)
{
log.debug( "An outgoing session to a different domain ('{}') hosted on the remote domain was found.", otherRemoteDomain );
// As this sub/superdomain is different from the original remote domain, we need to check if it supports dialback.
if ( session.isUsingServerDialback() )
{
log.debug( "Dialback was used for '{}'. This session can be re-used.", otherRemoteDomain );
break;
}
else
{
log.debug( "Dialback was not used for '{}'. This session cannot be re-used.", otherRemoteDomain );
session = null;
}
}
}
}
if (session == null) {
log.debug( "There are no pre-existing session to other domains hosted on the remote domain." );
}
}
if ( session != null )
{
log.debug( "A pre-existing session can be re-used. The session was established using server dialback so it is possible to do piggybacking to authenticate more domains." );
if ( session.checkOutgoingDomainPair(localDomain, remoteDomain) )
{
// Do nothing since the domain has already been authenticated.
log.debug( "Authentication successful (domain was already authenticated in the pre-existing session)." );
return true;
}
// A session already exists so authenticate the domain using that session.
if ( session.authenticateSubdomain( localDomain, remoteDomain ) )
{
log.debug( "Authentication successful (domain authentication was added using a pre-existing session)." );
return true;
}
else
{
log.warn( "Unable to authenticate: Unable to add authentication to pre-exising session." );
return false;
}
}
else
{
log.debug( "Unable to re-use an existing session. Creating a new session ..." );
int port = RemoteServerManager.getPortForServer(remoteDomain);
session = createOutgoingSession(localDomain, remoteDomain, port);
if (session != null) {
log.debug( "Created a new session." );
session.addOutgoingDomainPair(localDomain, remoteDomain);
sessionManager.outgoingServerSessionCreated((LocalOutgoingServerSession) session);
log.debug( "Authentication successful." );
return true;
} else {
log.warn( "Unable to authenticate: Fail to create new session." );
return false;
}
}
}
catch (Exception e)
{
log.error( "An exception occurred while authenticating remote domain!", e );
return false;
}
}
/**
* Establishes a new outgoing session to a remote domain. If the remote domain supports TLS and SASL then the new
* outgoing connection will be secured with TLS and authenticated using SASL. However, if TLS or SASL is not
* supported by the remote domain or if an error occurred while securing or authenticating the connection using SASL
* then server dialback will be used.
*
* @param localDomain the local domain to authenticate with the remote domain.
* @param remoteDomain the remote domain.
* @param port default port to use to establish the connection.
* @return new outgoing session to a remote domain, or null.
*/
private static LocalOutgoingServerSession createOutgoingSession(String localDomain, String remoteDomain, int port) {
final Logger log = LoggerFactory.getLogger( Log.getName() + "[Create outgoing session for: " + localDomain + " to " + remoteDomain + "]" );
log.debug( "Creating new session..." );
// Connect to remote server using XMPP 1.0 (TLS + SASL EXTERNAL or TLS + server dialback or server dialback)
log.debug( "Creating plain socket connection to a host that belongs to the remote XMPP domain." );
final Socket socket = SocketUtil.createSocketToXmppDomain( remoteDomain, port );
if ( socket == null ) {
log.info( "Unable to create new session: Cannot create a plain socket connection with any applicable remote host." );
return null;
}
SocketConnection connection = null;
try {
connection = new SocketConnection(XMPPServer.getInstance().getPacketDeliverer(), socket, false);
log.debug( "Send the stream header and wait for response..." );
StringBuilder openingStream = new StringBuilder();
openingStream.append("<stream:stream");
openingStream.append(" xmlns:db=\"jabber:server:dialback\"");
openingStream.append(" xmlns:stream=\"http://etherx.jabber.org/streams\"");
openingStream.append(" xmlns=\"jabber:server\"");
openingStream.append(" from=\"").append(localDomain).append("\""); // OF-673
openingStream.append(" to=\"").append(remoteDomain).append("\"");
openingStream.append(" version=\"1.0\">");
connection.deliverRawText(openingStream.toString());
// Set a read timeout (of 5 seconds) so we don't keep waiting forever
int soTimeout = socket.getSoTimeout();
socket.setSoTimeout(5000);
XMPPPacketReader reader = new XMPPPacketReader();
reader.getXPPParser().setInput(new InputStreamReader(socket.getInputStream(),
StandardCharsets.UTF_8));
// Get the answer from the Receiving Server
XmlPullParser xpp = reader.getXPPParser();
for (int eventType = xpp.getEventType(); eventType != XmlPullParser.START_TAG;) {
eventType = xpp.next();
}
String serverVersion = xpp.getAttributeValue("", "version");
String id = xpp.getAttributeValue("", "id");
log.debug( "Got a response (stream ID: {}, version: {}). Check if the remote server is XMPP 1.0 compliant...", id, serverVersion );
if (serverVersion != null && decodeVersion(serverVersion)[0] >= 1) {
log.debug( "The remote server is XMPP 1.0 compliant (or at least reports to be)." );
// Restore default timeout
socket.setSoTimeout(soTimeout);
log.debug( "Processing stream features of the remote domain..." );
Element features = reader.parseDocument().getRootElement();
if (features != null) {
log.debug( "Check if both us as well as the remote server have enabled STARTTLS and/or dialback ..." );
final boolean useTLS = JiveGlobals.getBooleanProperty(ConnectionSettings.Server.TLS_ENABLED, true);
if (useTLS && features.element("starttls") != null) {
log.debug( "Both us and the remote server support the STARTTLS feature. Secure and authenticate the connection with TLS & SASL..." );
LocalOutgoingServerSession answer = secureAndAuthenticate(remoteDomain, connection, reader, openingStream, localDomain);
if (answer != null) {
log.debug( "Successfully secured/authenticated the connection with TLS/SASL)!" );
// Everything went fine so return the secured and
// authenticated connection
log.debug( "Successfully created new session!" );
return answer;
}
log.debug( "Unable to secure and authenticate the connection with TLS & SASL." );
}
else if (connection.getTlsPolicy() == Connection.TLSPolicy.required) {
log.debug("I have no StartTLS yet I must TLS");
connection.close();
return null;
}
// Check if we are going to try server dialback (XMPP 1.0)
else if (ServerDialback.isEnabled() && features.element("dialback") != null) {
log.debug( "Both us and the remote server support the 'dialback' feature. Authenticate the connection with dialback..." );
ServerDialback method = new ServerDialback(connection, localDomain);
OutgoingServerSocketReader newSocketReader = new OutgoingServerSocketReader(reader);
if (method.authenticateDomain(newSocketReader, localDomain, remoteDomain, id)) {
log.debug( "Successfully authenticated the connection with dialback!" );
StreamID streamID = new BasicStreamIDFactory().createStreamID(id);
LocalOutgoingServerSession session = new LocalOutgoingServerSession(localDomain, connection, newSocketReader, streamID);
connection.init(session);
// Set the hostname as the address of the session
session.setAddress(new JID(null, remoteDomain, null));
log.debug( "Successfully created new session!" );
return session;
}
else {
log.debug( "Unable to authenticate the connection with dialback." );
}
}
}
else {
log.debug( "Error! No data from the remote server (expected a 'feature' element).");
}
} else {
log.debug( "The remote server is not XMPP 1.0 compliant." );
}
log.debug( "Something went wrong so close the connection and try server dialback over a plain connection" );
if (connection.getTlsPolicy() == Connection.TLSPolicy.required) {
log.debug("I have no StartTLS yet I must TLS");
connection.close();
return null;
}
connection.close();
}
catch (SSLHandshakeException e)
{
// This is a failure as described in RFC3620, section 5.4.3.2 "STARTTLS Failure".
log.info( "STARTTLS negotiation failed. Closing connection (without sending any data such as <failure/> or </stream>).", e );
// The receiving entity is expected to close the socket *without* sending any more data (<failure/> nor </stream>).
// It is probably (see OF-794) best if we, as the initiating entity, therefor don't send any data either.
if (connection != null) {
connection.forceClose();
}
}
catch (Exception e)
{
// This might be RFC3620, section 5.4.2.2 "Failure Case" or even an unrelated problem. Handle 'normally'.
log.warn( "An exception occurred while creating an encrypted session. Closing connection.", e );
if (connection != null) {
connection.close();
}
}
if (ServerDialback.isEnabled())
{
log.debug( "Unable to create a new session. Going to try connecting using server dialback as a fallback." );
// Use server dialback (pre XMPP 1.0) over a plain connection
final LocalOutgoingServerSession outgoingSession = new ServerDialback().createOutgoingSession( localDomain, remoteDomain, port );
if ( outgoingSession != null) { // TODO this success handler behaves differently from a similar success handler above. Shouldn't those be the same?
log.debug( "Successfully created new session (using dialback as a fallback)!" );
return outgoingSession;
} else {
log.warn( "Unable to create a new session: Dialback (as a fallback) failed." );
return null;
}
}
else
{
log.warn( "Unable to create a new session: exhausted all options (not trying dialback as a fallback, as server dialback is disabled by configuration." );
return null;
}
}
private static LocalOutgoingServerSession secureAndAuthenticate(String remoteDomain, SocketConnection connection, XMPPPacketReader reader, StringBuilder openingStream, String localDomain) throws Exception {
final Logger log = LoggerFactory.getLogger(Log.getName() + "[Secure/Authenticate connection for: " + localDomain + " to: " + remoteDomain + "]" );
Element features;
log.debug( "Securing and authenticating connection ...");
log.debug( "Indicating we want TLS and wait for response." );
connection.deliverRawText( "<starttls xmlns='urn:ietf:params:xml:ns:xmpp-tls'/>" );
MXParser xpp = reader.getXPPParser();
// Wait for the <proceed> response
Element proceed = reader.parseDocument().getRootElement();
if (proceed != null && proceed.getName().equals("proceed")) {
log.debug( "Received 'proceed' from remote server. Negotiating TLS..." );
try {
// boolean needed = JiveGlobals.getBooleanProperty(ConnectionSettings.Server.TLS_CERTIFICATE_VERIFY, true) &&
// JiveGlobals.getBooleanProperty(ConnectionSettings.Server.TLS_CERTIFICATE_CHAIN_VERIFY, true) &&
// !JiveGlobals.getBooleanProperty(ConnectionSettings.Server.TLS_ACCEPT_SELFSIGNED_CERTS, false);
connection.startTLS(true);
} catch(Exception e) {
log.debug("TLS negotiation failed: " + e.getMessage());
throw e;
}
log.debug( "TLS negotiation was successful. Connection secured. Proceeding with authentication..." );
if (!SASLAuthentication.verifyCertificates(connection.getPeerCertificates(), remoteDomain, true)) {
if (ServerDialback.isEnabled() || ServerDialback.isEnabledForSelfSigned()) {
log.debug( "SASL authentication failed. Will continue with dialback." );
} else {
log.warn( "Unable to authenticated the connection: SASL authentication failed (and dialback is not available)." );
return null;
}
}
log.debug( "TLS negotiation was successful so initiate a new stream." );
connection.deliverRawText( openingStream.toString() );
// Reset the parser to use the new secured reader
xpp.setInput(new InputStreamReader(connection.getTLSStreamHandler().getInputStream(), StandardCharsets.UTF_8));
// Skip new stream element
for (int eventType = xpp.getEventType(); eventType != XmlPullParser.START_TAG;) {
eventType = xpp.next();
}
// Get the stream ID
String id = xpp.getAttributeValue("", "id");
// Get new stream features
features = reader.parseDocument().getRootElement();
if (features != null) {
// Bookkeeping: determine what functionality the remote server offers.
boolean saslEXTERNALoffered = false;
if (features.element("mechanisms") != null) {
Iterator<Element> it = features.element("mechanisms").elementIterator();
while (it.hasNext()) {
Element mechanism = it.next();
if ("EXTERNAL".equals(mechanism.getTextTrim())) {
saslEXTERNALoffered = true;
break;
}
}
}
final boolean dialbackOffered = features.element("dialback") != null;
log.debug("Remote server is offering dialback: {}, EXTERNAL SASL:", dialbackOffered, saslEXTERNALoffered );
LocalOutgoingServerSession result = null;
// first, try SASL
if (saslEXTERNALoffered) {
log.debug( "Trying to authenticate with EXTERNAL SASL." );
result = attemptSASLexternal(connection, xpp, reader, localDomain, remoteDomain, id, openingStream);
if (result == null) {
log.debug( "Failed to authenticate with EXTERNAL SASL." );
} else {
log.debug( "Successfully authenticated with EXTERNAL SASL." );
}
}
// SASL unavailable or failed, try dialback.
if (result == null) {
log.debug( "Trying to authenticate with dialback." );
result = attemptDialbackOverTLS(connection, reader, localDomain, remoteDomain, id);
if (result == null) {
log.debug( "Failed to authenticate with dialback." );
} else {
log.debug( "Successfully authenticated with dialback." );
}
}
if ( result != null ) {
log.debug( "Successfully secured and authenticated connection!" );
return result;
} else {
log.warn( "Unable to secure and authenticate connection: Exhausted all options." );
return null;
}
}
else {
log.debug( "Failed to secure and authenticate connection: neither SASL mechanisms nor SERVER DIALBACK were offered by the remote host." );
return null;
}
}
else {
log.debug( "Failed to secure and authenticate connection: <proceed> was not received!" );
return null;
}
}
private static LocalOutgoingServerSession attemptDialbackOverTLS(Connection connection, XMPPPacketReader reader, String localDomain, String remoteDomain, String id) {
final Logger log = LoggerFactory.getLogger( Log.getName() + "[Dialback over TLS for: " + localDomain + " to: " + remoteDomain + " (Stream ID: " + id + ")]" );
if (ServerDialback.isEnabled() || ServerDialback.isEnabledForSelfSigned()) {
log.debug("Trying to connecting using dialback over TLS.");
ServerDialback method = new ServerDialback(connection, localDomain);
OutgoingServerSocketReader newSocketReader = new OutgoingServerSocketReader(reader);
if (method.authenticateDomain(newSocketReader, localDomain, remoteDomain, id)) {
log.debug("Dialback over TLS was successful.");
StreamID streamID = new BasicStreamIDFactory().createStreamID(id);
LocalOutgoingServerSession session = new LocalOutgoingServerSession(localDomain, connection, newSocketReader, streamID);
connection.init(session);
// Set the hostname as the address of the session
session.setAddress(new JID(null, remoteDomain, null));
return session;
}
else {
log.debug("Dialback over TLS failed");
return null;
}
}
else {
log.debug("Skipping server dialback attempt as it has been disabled by local configuration.");
return null;
}
}
private static LocalOutgoingServerSession attemptSASLexternal(SocketConnection connection, MXParser xpp, XMPPPacketReader reader, String localDomain, String remoteDomain, String id, StringBuilder openingStream) throws DocumentException, IOException, XmlPullParserException {
final Logger log = LoggerFactory.getLogger( Log.getName() + "[EXTERNAL SASL for: " + localDomain + " to: " + remoteDomain + " (Stream ID: " + id + ")]" );
log.debug("Starting EXTERNAL SASL.");
if (doExternalAuthentication(localDomain, connection, reader)) {
log.debug("EXTERNAL SASL was successful.");
// SASL was successful so initiate a new stream
connection.deliverRawText(openingStream.toString());
// Reset the parser
//xpp.resetInput();
// // Reset the parser to use the new secured reader
xpp.setInput(new InputStreamReader(connection.getTLSStreamHandler().getInputStream(), StandardCharsets.UTF_8));
// Skip the opening stream sent by the server
for (int eventType = xpp.getEventType(); eventType != XmlPullParser.START_TAG;) {
eventType = xpp.next();
}
// SASL authentication was successful so create new OutgoingServerSession
id = xpp.getAttributeValue("", "id");
StreamID streamID = new BasicStreamIDFactory().createStreamID(id);
LocalOutgoingServerSession session = new LocalOutgoingServerSession(localDomain, connection, new OutgoingServerSocketReader(reader), streamID);
connection.init(session);
// Set the hostname as the address of the session
session.setAddress(new JID(null, remoteDomain, null));
// Set that the session was created using TLS+SASL (no server dialback)
session.usingServerDialback = false;
return session;
}
else {
log.debug("EXTERNAL SASL failed.");
return null;
}
}
private static boolean doExternalAuthentication(String localDomain, SocketConnection connection,
XMPPPacketReader reader) throws DocumentException, IOException, XmlPullParserException {
StringBuilder sb = new StringBuilder();
sb.append("<auth xmlns=\"urn:ietf:params:xml:ns:xmpp-sasl\" mechanism=\"EXTERNAL\">");
sb.append(StringUtils.encodeBase64(localDomain));
sb.append("</auth>");
connection.deliverRawText(sb.toString());
Element response = reader.parseDocument().getRootElement();
return response != null && "success".equals(response.getName());
}
public LocalOutgoingServerSession(String localDomain, Connection connection, OutgoingServerSocketReader socketReader, StreamID streamID) {
super(localDomain, connection, streamID);
this.socketReader = socketReader;
socketReader.setSession(this);
}
@Override
boolean canProcess(Packet packet) {
final String senderDomain = packet.getFrom().getDomain();
final String recipDomain = packet.getTo().getDomain();
boolean processed = true;
if (!checkOutgoingDomainPair(senderDomain, recipDomain)) {
synchronized (("Auth::" + senderDomain).intern()) {
if (!checkOutgoingDomainPair(senderDomain, recipDomain) &&
!authenticateSubdomain(senderDomain, packet.getTo().getDomain())) {
// Return error since sender domain was not validated by remote server
processed = false;
}
}
}
if (!processed) {
returnErrorToSender(packet);
}
return processed;
}
@Override
void deliver(Packet packet) throws UnauthorizedException {
if (!conn.isClosed()) {
conn.deliver(packet);
}
}
@Override
public boolean authenticateSubdomain(String localDomain, String remoteDomain) {
if (!usingServerDialback) {
// Using SASL so just assume that the domain was validated
// (note: this may not be correct)
addOutgoingDomainPair(localDomain, remoteDomain);
return true;
}
ServerDialback method = new ServerDialback(getConnection(), localDomain);
if (method.authenticateDomain(socketReader, localDomain, remoteDomain, getStreamID().getID())) {
// Add the validated domain as an authenticated domain
addOutgoingDomainPair(localDomain, remoteDomain);
return true;
}
return false;
}
private void returnErrorToSender(Packet packet) {
RoutingTable routingTable = XMPPServer.getInstance().getRoutingTable();
if (packet.getError() != null) {
Log.debug("Possible double bounce: " + packet.toXML());
}
try {
if (packet instanceof IQ) {
if (((IQ) packet).isResponse()) {
Log.debug("XMPP specs forbid us to respond with an IQ error to: " + packet.toXML());
return;
}
IQ reply = new IQ();
reply.setID(packet.getID());
reply.setTo(packet.getFrom());
reply.setFrom(packet.getTo());
reply.setChildElement(((IQ) packet).getChildElement().createCopy());
reply.setType(IQ.Type.error);
reply.setError(PacketError.Condition.remote_server_not_found);
routingTable.routePacket(reply.getTo(), reply, true);
}
else if (packet instanceof Presence) {
if (((Presence)packet).getType() == Presence.Type.error) {
Log.debug("Double-bounce of presence: " + packet.toXML());
return;
}
Presence reply = new Presence();
reply.setID(packet.getID());
reply.setTo(packet.getFrom());
reply.setFrom(packet.getTo());
reply.setType(Presence.Type.error);
reply.setError(PacketError.Condition.remote_server_not_found);
routingTable.routePacket(reply.getTo(), reply, true);
}
else if (packet instanceof Message) {
if (((Message)packet).getType() == Message.Type.error){
Log.debug("Double-bounce of message: " + packet.toXML());
return;
}
Message reply = new Message();
reply.setID(packet.getID());
reply.setTo(packet.getFrom());
reply.setFrom(packet.getTo());
reply.setType(Message.Type.error);
reply.setThread(((Message)packet).getThread());
reply.setError(PacketError.Condition.remote_server_not_found);
routingTable.routePacket(reply.getTo(), reply, true);
}
}
catch (Exception e) {
Log.error("Error returning error to sender. Original packet: " + packet, e);
}
}
@Override
public String getAvailableStreamFeatures() {
// Nothing special to add
return null;
}
@Override
public void addOutgoingDomainPair(String localDomain, String remoteDomain) {
boolean found = false;
for (DomainPair domainPair : outgoingDomainPairs) {
if (domainPair.getRemote().equals(remoteDomain)) found = true;
}
outgoingDomainPairs.add(new DomainPair(localDomain, remoteDomain));
if (!found) {
XMPPServer.getInstance().getRoutingTable().addServerRoute(new JID(null, remoteDomain, null, true), this);
}
}
@Override
public boolean checkOutgoingDomainPair(String localDomain, String remoteDomain) {
return outgoingDomainPairs.contains(new DomainPair(localDomain, remoteDomain));
}
@Override
public Collection<DomainPair> getOutgoingDomainPairs() {
return outgoingDomainPairs;
}
}
/*
* Copyright (C) 2005-2008 Jive Software. All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.jivesoftware.openfire.session;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.Socket;
import java.nio.charset.StandardCharsets;
import java.util.*;
import java.util.regex.Pattern;
import javax.net.ssl.SSLHandshakeException;
import org.dom4j.DocumentException;
import org.dom4j.Element;
import org.dom4j.io.XMPPPacketReader;
import org.jivesoftware.openfire.Connection;
import org.jivesoftware.openfire.RoutingTable;
import org.jivesoftware.openfire.SessionManager;
import org.jivesoftware.openfire.StreamID;
import org.jivesoftware.openfire.XMPPServer;
import org.jivesoftware.openfire.auth.UnauthorizedException;
import org.jivesoftware.openfire.net.*;
import org.jivesoftware.openfire.server.OutgoingServerSocketReader;
import org.jivesoftware.openfire.server.RemoteServerManager;
import org.jivesoftware.openfire.server.ServerDialback;
import org.jivesoftware.openfire.spi.BasicStreamIDFactory;
import org.jivesoftware.util.JiveGlobals;
import org.jivesoftware.util.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlPullParserException;
import org.xmpp.packet.IQ;
import org.xmpp.packet.JID;
import org.xmpp.packet.Message;
import org.xmpp.packet.Packet;
import org.xmpp.packet.PacketError;
import org.xmpp.packet.Presence;
/**
* Server-to-server communication is done using two TCP connections between the servers. One
* connection is used for sending packets while the other connection is used for receiving packets.
* The <tt>OutgoingServerSession</tt> represents the connection to a remote server that will only
* be used for sending packets.<p>
*
* Currently only the Server Dialback method is being used for authenticating with the remote
* server. Use {@link #authenticateDomain(String, String)} to create a new connection to a remote
* server that will be used for sending packets to the remote server from the specified domain.
* Only the authenticated domains with the remote server will be able to effectively send packets
* to the remote server. The remote server will reject and close the connection if a
* non-authenticated domain tries to send a packet through this connection.<p>
*
* Once the connection has been established with the remote server and at least a domain has been
* authenticated then a new route will be added to the routing table for this connection. For
* optimization reasons the same outgoing connection will be used even if the remote server has
* several hostnames. However, different routes will be created in the routing table for each
* hostname of the remote server.
*
* @author Gaston Dombiak
*/
public class LocalOutgoingServerSession extends LocalServerSession implements OutgoingServerSession {
private static final Logger Log = LoggerFactory.getLogger(LocalOutgoingServerSession.class);
/**
* Regular expression to ensure that the hostname contains letters.
*/
private static Pattern pattern = Pattern.compile("[a-zA-Z]");
private OutgoingServerSocketReader socketReader;
private Collection<DomainPair> outgoingDomainPairs = new HashSet<>();
/**
* Authenticates the local domain to the remote domain. Once authenticated the remote domain can be expected to
* start accepting data from the local domain.
*
* This implementation will attempt to re-use an existing connection. An connection is deemed re-usable when it is either:
* <ul>
* <li>authenticated to the remote domain itself, or:</li>
* <li>authenticated to a sub- or superdomain of the remote domain AND offers dialback.</li>
* </ul>
*
* When no re-usable connection exists, a new connection will be created.
*
* DNS will be used to find hosts for the remote domain. When DNS records do not specify a port, port 5269 will be
* used unless this default is overridden by the <b>xmpp.server.socket.remotePort</b> property.
*
* @param localDomain the local domain to authenticate with the remote server.
* @param remoteDomain the remote server, to which the local domain intends to send data.
* @return True if the domain was authenticated by the remote server.
*/
public static boolean authenticateDomain(final String localDomain, final String remoteDomain) {
final Logger log = LoggerFactory.getLogger( Log.getName() + "[Authenticate local domain: '" + localDomain + "' to remote domain: '" + remoteDomain + "']" );
log.debug( "Start domain authentication ..." );
if (remoteDomain == null || remoteDomain.length() == 0 || remoteDomain.trim().indexOf(' ') > -1) {
// Do nothing if the target domain is empty, null or contains whitespaces
log.warn( "Unable to authenticate: remote domain is invalid." );
return false;
}
try {
// Check if the remote domain is in the blacklist
if (!RemoteServerManager.canAccess(remoteDomain)) {
log.info( "Unable to authenticate: Remote domain is not accessible according to our configuration (typical causes: server federation is disabled, or domain is blacklisted)." );
return false;
}
log.debug( "Searching for pre-existing outgoing sessions to the remote domain (if one exists, it will be re-used) ..." );
OutgoingServerSession session;
SessionManager sessionManager = SessionManager.getInstance();
if (sessionManager == null) {
// Server is shutting down while we are trying to create a new s2s connection
log.warn( "Unable to authenticate: a SessionManager instance is not available. This should not occur unless Openfire is starting up or shutting down." );
return false;
}
session = sessionManager.getOutgoingServerSession(remoteDomain);
if (session == null)
{
log.debug( "There are no pre-existing outgoing sessions to the remote domain itself. Searching for pre-existing outgoing sessions to super- or subdomains of the remote domain (if one exists, it might be re-usable) ..." );
for ( IncomingServerSession incomingSession : sessionManager.getIncomingServerSessions( remoteDomain ) )
{
// These are the remote domains that are allowed to send data to the local domain - expected to be sub- or superdomains of remoteDomain
for ( String otherRemoteDomain : incomingSession.getValidatedDomains() )
{
// See if there's an outgoing session to any of the (other) domains hosted by the remote domain.
session = sessionManager.getOutgoingServerSession( otherRemoteDomain );
if (session != null)
{
log.debug( "An outgoing session to a different domain ('{}') hosted on the remote domain was found.", otherRemoteDomain );
// As this sub/superdomain is different from the original remote domain, we need to check if it supports dialback.
if ( session.isUsingServerDialback() )
{
log.debug( "Dialback was used for '{}'. This session can be re-used.", otherRemoteDomain );
break;
}
else
{
log.debug( "Dialback was not used for '{}'. This session cannot be re-used.", otherRemoteDomain );
session = null;
}
}
}
}
if (session == null) {
log.debug( "There are no pre-existing session to other domains hosted on the remote domain." );
}
}
if ( session != null )
{
log.debug( "A pre-existing session can be re-used. The session was established using server dialback so it is possible to do piggybacking to authenticate more domains." );
if ( session.checkOutgoingDomainPair(localDomain, remoteDomain) )
{
// Do nothing since the domain has already been authenticated.
log.debug( "Authentication successful (domain was already authenticated in the pre-existing session)." );
return true;
}
// A session already exists so authenticate the domain using that session.
if ( session.authenticateSubdomain( localDomain, remoteDomain ) )
{
log.debug( "Authentication successful (domain authentication was added using a pre-existing session)." );
return true;
}
else
{
log.warn( "Unable to authenticate: Unable to add authentication to pre-exising session." );
return false;
}
}
else
{
log.debug( "Unable to re-use an existing session. Creating a new session ..." );
int port = RemoteServerManager.getPortForServer(remoteDomain);
session = createOutgoingSession(localDomain, remoteDomain, port);
if (session != null) {
log.debug( "Created a new session." );
session.addOutgoingDomainPair(localDomain, remoteDomain);
sessionManager.outgoingServerSessionCreated((LocalOutgoingServerSession) session);
log.debug( "Authentication successful." );
return true;
} else {
log.warn( "Unable to authenticate: Fail to create new session." );
return false;
}
}
}
catch (Exception e)
{
log.error( "An exception occurred while authenticating remote domain!", e );
return false;
}
}
/**
* Establishes a new outgoing session to a remote domain. If the remote domain supports TLS and SASL then the new
* outgoing connection will be secured with TLS and authenticated using SASL. However, if TLS or SASL is not
* supported by the remote domain or if an error occurred while securing or authenticating the connection using SASL
* then server dialback will be used.
*
* @param localDomain the local domain to authenticate with the remote domain.
* @param remoteDomain the remote domain.
* @param port default port to use to establish the connection.
* @return new outgoing session to a remote domain, or null.
*/
private static LocalOutgoingServerSession createOutgoingSession(String localDomain, String remoteDomain, int port) {
final Logger log = LoggerFactory.getLogger( Log.getName() + "[Create outgoing session for: " + localDomain + " to " + remoteDomain + "]" );
log.debug( "Creating new session..." );
// Connect to remote server using XMPP 1.0 (TLS + SASL EXTERNAL or TLS + server dialback or server dialback)
log.debug( "Creating plain socket connection to a host that belongs to the remote XMPP domain." );
final Socket socket = SocketUtil.createSocketToXmppDomain( remoteDomain, port );
if ( socket == null ) {
log.info( "Unable to create new session: Cannot create a plain socket connection with any applicable remote host." );
return null;
}
SocketConnection connection = null;
try {
connection = new SocketConnection(XMPPServer.getInstance().getPacketDeliverer(), socket, false);
log.debug( "Send the stream header and wait for response..." );
StringBuilder openingStream = new StringBuilder();
openingStream.append("<stream:stream");
openingStream.append(" xmlns:db=\"jabber:server:dialback\"");
openingStream.append(" xmlns:stream=\"http://etherx.jabber.org/streams\"");
openingStream.append(" xmlns=\"jabber:server\"");
openingStream.append(" from=\"").append(localDomain).append("\""); // OF-673
openingStream.append(" to=\"").append(remoteDomain).append("\"");
openingStream.append(" version=\"1.0\">");
connection.deliverRawText(openingStream.toString());
// Set a read timeout (of 5 seconds) so we don't keep waiting forever
int soTimeout = socket.getSoTimeout();
socket.setSoTimeout(5000);
XMPPPacketReader reader = new XMPPPacketReader();
reader.getXPPParser().setInput(new InputStreamReader(socket.getInputStream(),
StandardCharsets.UTF_8));
// Get the answer from the Receiving Server
XmlPullParser xpp = reader.getXPPParser();
for (int eventType = xpp.getEventType(); eventType != XmlPullParser.START_TAG;) {
eventType = xpp.next();
}
String serverVersion = xpp.getAttributeValue("", "version");
String id = xpp.getAttributeValue("", "id");
log.debug( "Got a response (stream ID: {}, version: {}). Check if the remote server is XMPP 1.0 compliant...", id, serverVersion );
if (serverVersion != null && decodeVersion(serverVersion)[0] >= 1) {
log.debug( "The remote server is XMPP 1.0 compliant (or at least reports to be)." );
// Restore default timeout
socket.setSoTimeout(soTimeout);
log.debug( "Processing stream features of the remote domain..." );
Element features = reader.parseDocument().getRootElement();
if (features != null) {
log.debug( "Check if both us as well as the remote server have enabled STARTTLS and/or dialback ..." );
final boolean useTLS = JiveGlobals.getBooleanProperty(ConnectionSettings.Server.TLS_ENABLED, true);
if (useTLS && features.element("starttls") != null) {
log.debug( "Both us and the remote server support the STARTTLS feature. Secure and authenticate the connection with TLS & SASL..." );
LocalOutgoingServerSession answer = secureAndAuthenticate(remoteDomain, connection, reader, openingStream, localDomain);
if (answer != null) {
log.debug( "Successfully secured/authenticated the connection with TLS/SASL)!" );
// Everything went fine so return the secured and
// authenticated connection
log.debug( "Successfully created new session!" );
return answer;
}
log.debug( "Unable to secure and authenticate the connection with TLS & SASL." );
}
else if (connection.getTlsPolicy() == Connection.TLSPolicy.required) {
log.debug("I have no StartTLS yet I must TLS");
connection.close();
return null;
}
// Check if we are going to try server dialback (XMPP 1.0)
else if (ServerDialback.isEnabled() && features.element("dialback") != null) {
log.debug( "Both us and the remote server support the 'dialback' feature. Authenticate the connection with dialback..." );
ServerDialback method = new ServerDialback(connection, localDomain);
OutgoingServerSocketReader newSocketReader = new OutgoingServerSocketReader(reader);
if (method.authenticateDomain(newSocketReader, localDomain, remoteDomain, id)) {
log.debug( "Successfully authenticated the connection with dialback!" );
StreamID streamID = new BasicStreamIDFactory().createStreamID(id);
LocalOutgoingServerSession session = new LocalOutgoingServerSession(localDomain, connection, newSocketReader, streamID);
connection.init(session);
// Set the hostname as the address of the session
session.setAddress(new JID(null, remoteDomain, null));
log.debug( "Successfully created new session!" );
return session;
}
else {
log.debug( "Unable to authenticate the connection with dialback." );
}
}
}
else {
log.debug( "Error! No data from the remote server (expected a 'feature' element).");
}
} else {
log.debug( "The remote server is not XMPP 1.0 compliant." );
}
log.debug( "Something went wrong so close the connection and try server dialback over a plain connection" );
if (connection.getTlsPolicy() == Connection.TLSPolicy.required) {
log.debug("I have no StartTLS yet I must TLS");
connection.close();
return null;
}
connection.close();
}
catch (SSLHandshakeException e)
{
// This is a failure as described in RFC3620, section 5.4.3.2 "STARTTLS Failure".
log.info( "STARTTLS negotiation failed. Closing connection (without sending any data such as <failure/> or </stream>).", e );
// The receiving entity is expected to close the socket *without* sending any more data (<failure/> nor </stream>).
// It is probably (see OF-794) best if we, as the initiating entity, therefor don't send any data either.
if (connection != null) {
connection.forceClose();
}
}
catch (Exception e)
{
// This might be RFC3620, section 5.4.2.2 "Failure Case" or even an unrelated problem. Handle 'normally'.
log.warn( "An exception occurred while creating an encrypted session. Closing connection.", e );
if (connection != null) {
connection.close();
}
}
if (ServerDialback.isEnabled())
{
log.debug( "Unable to create a new session. Going to try connecting using server dialback as a fallback." );
// Use server dialback (pre XMPP 1.0) over a plain connection
final LocalOutgoingServerSession outgoingSession = new ServerDialback().createOutgoingSession( localDomain, remoteDomain, port );
if ( outgoingSession != null) { // TODO this success handler behaves differently from a similar success handler above. Shouldn't those be the same?
log.debug( "Successfully created new session (using dialback as a fallback)!" );
return outgoingSession;
} else {
log.warn( "Unable to create a new session: Dialback (as a fallback) failed." );
return null;
}
}
else
{
log.warn( "Unable to create a new session: exhausted all options (not trying dialback as a fallback, as server dialback is disabled by configuration." );
return null;
}
}
private static LocalOutgoingServerSession secureAndAuthenticate(String remoteDomain, SocketConnection connection, XMPPPacketReader reader, StringBuilder openingStream, String localDomain) throws Exception {
final Logger log = LoggerFactory.getLogger(Log.getName() + "[Secure/Authenticate connection for: " + localDomain + " to: " + remoteDomain + "]" );
Element features;
log.debug( "Securing and authenticating connection ...");
log.debug( "Indicating we want TLS and wait for response." );
connection.deliverRawText( "<starttls xmlns='urn:ietf:params:xml:ns:xmpp-tls'/>" );
MXParser xpp = reader.getXPPParser();
// Wait for the <proceed> response
Element proceed = reader.parseDocument().getRootElement();
if (proceed != null && proceed.getName().equals("proceed")) {
log.debug( "Received 'proceed' from remote server. Negotiating TLS..." );
try {
// boolean needed = JiveGlobals.getBooleanProperty(ConnectionSettings.Server.TLS_CERTIFICATE_VERIFY, true) &&
// JiveGlobals.getBooleanProperty(ConnectionSettings.Server.TLS_CERTIFICATE_CHAIN_VERIFY, true) &&
// !JiveGlobals.getBooleanProperty(ConnectionSettings.Server.TLS_ACCEPT_SELFSIGNED_CERTS, false);
connection.startTLS(true);
} catch(Exception e) {
log.debug("TLS negotiation failed: " + e.getMessage());
throw e;
}
log.debug( "TLS negotiation was successful. Connection secured. Proceeding with authentication..." );
if (!SASLAuthentication.verifyCertificates(connection.getPeerCertificates(), remoteDomain, true)) {
if (ServerDialback.isEnabled() || ServerDialback.isEnabledForSelfSigned()) {
log.debug( "SASL authentication failed. Will continue with dialback." );
} else {
log.warn( "Unable to authenticated the connection: SASL authentication failed (and dialback is not available)." );
return null;
}
}
log.debug( "TLS negotiation was successful so initiate a new stream." );
connection.deliverRawText( openingStream.toString() );
// Reset the parser to use the new secured reader
xpp.setInput(new InputStreamReader(connection.getTLSStreamHandler().getInputStream(), StandardCharsets.UTF_8));
// Skip new stream element
for (int eventType = xpp.getEventType(); eventType != XmlPullParser.START_TAG;) {
eventType = xpp.next();
}
// Get the stream ID
String id = xpp.getAttributeValue("", "id");
// Get new stream features
features = reader.parseDocument().getRootElement();
if (features != null) {
// Bookkeeping: determine what functionality the remote server offers.
boolean saslEXTERNALoffered = false;
if (features.element("mechanisms") != null) {
Iterator<Element> it = features.element("mechanisms").elementIterator();
while (it.hasNext()) {
Element mechanism = it.next();
if ("EXTERNAL".equals(mechanism.getTextTrim())) {
saslEXTERNALoffered = true;
break;
}
}
}
final boolean dialbackOffered = features.element("dialback") != null;
log.debug("Remote server is offering dialback: {}, EXTERNAL SASL:", dialbackOffered, saslEXTERNALoffered );
LocalOutgoingServerSession result = null;
// first, try SASL
if (saslEXTERNALoffered) {
log.debug( "Trying to authenticate with EXTERNAL SASL." );
result = attemptSASLexternal(connection, xpp, reader, localDomain, remoteDomain, id, openingStream);
if (result == null) {
log.debug( "Failed to authenticate with EXTERNAL SASL." );
} else {
log.debug( "Successfully authenticated with EXTERNAL SASL." );
}
}
// SASL unavailable or failed, try dialback.
if (result == null) {
log.debug( "Trying to authenticate with dialback." );
result = attemptDialbackOverTLS(connection, reader, localDomain, remoteDomain, id);
if (result == null) {
log.debug( "Failed to authenticate with dialback." );
} else {
log.debug( "Successfully authenticated with dialback." );
}
}
if ( result != null ) {
log.debug( "Successfully secured and authenticated connection!" );
return result;
} else {
log.warn( "Unable to secure and authenticate connection: Exhausted all options." );
return null;
}
}
else {
log.debug( "Failed to secure and authenticate connection: neither SASL mechanisms nor SERVER DIALBACK were offered by the remote host." );
return null;
}
}
else {
log.debug( "Failed to secure and authenticate connection: <proceed> was not received!" );
return null;
}
}
private static LocalOutgoingServerSession attemptDialbackOverTLS(Connection connection, XMPPPacketReader reader, String localDomain, String remoteDomain, String id) {
final Logger log = LoggerFactory.getLogger( Log.getName() + "[Dialback over TLS for: " + localDomain + " to: " + remoteDomain + " (Stream ID: " + id + ")]" );
if (ServerDialback.isEnabled() || ServerDialback.isEnabledForSelfSigned()) {
log.debug("Trying to connecting using dialback over TLS.");
ServerDialback method = new ServerDialback(connection, localDomain);
OutgoingServerSocketReader newSocketReader = new OutgoingServerSocketReader(reader);
if (method.authenticateDomain(newSocketReader, localDomain, remoteDomain, id)) {
log.debug("Dialback over TLS was successful.");
StreamID streamID = new BasicStreamIDFactory().createStreamID(id);
LocalOutgoingServerSession session = new LocalOutgoingServerSession(localDomain, connection, newSocketReader, streamID);
connection.init(session);
// Set the hostname as the address of the session
session.setAddress(new JID(null, remoteDomain, null));
return session;
}
else {
log.debug("Dialback over TLS failed");
return null;
}
}
else {
log.debug("Skipping server dialback attempt as it has been disabled by local configuration.");
return null;
}
}
private static LocalOutgoingServerSession attemptSASLexternal(SocketConnection connection, MXParser xpp, XMPPPacketReader reader, String localDomain, String remoteDomain, String id, StringBuilder openingStream) throws DocumentException, IOException, XmlPullParserException {
final Logger log = LoggerFactory.getLogger( Log.getName() + "[EXTERNAL SASL for: " + localDomain + " to: " + remoteDomain + " (Stream ID: " + id + ")]" );
log.debug("Starting EXTERNAL SASL.");
if (doExternalAuthentication(localDomain, connection, reader)) {
log.debug("EXTERNAL SASL was successful.");
// SASL was successful so initiate a new stream
connection.deliverRawText(openingStream.toString());
// Reset the parser
//xpp.resetInput();
// // Reset the parser to use the new secured reader
xpp.setInput(new InputStreamReader(connection.getTLSStreamHandler().getInputStream(), StandardCharsets.UTF_8));
// Skip the opening stream sent by the server
for (int eventType = xpp.getEventType(); eventType != XmlPullParser.START_TAG;) {
eventType = xpp.next();
}
// SASL authentication was successful so create new OutgoingServerSession
id = xpp.getAttributeValue("", "id");
StreamID streamID = new BasicStreamIDFactory().createStreamID(id);
LocalOutgoingServerSession session = new LocalOutgoingServerSession(localDomain, connection, new OutgoingServerSocketReader(reader), streamID);
connection.init(session);
// Set the hostname as the address of the session
session.setAddress(new JID(null, remoteDomain, null));
// Set that the session was created using TLS+SASL (no server dialback)
session.usingServerDialback = false;
return session;
}
else {
log.debug("EXTERNAL SASL failed.");
return null;
}
}
private static boolean doExternalAuthentication(String localDomain, SocketConnection connection,
XMPPPacketReader reader) throws DocumentException, IOException, XmlPullParserException {
StringBuilder sb = new StringBuilder();
sb.append("<auth xmlns=\"urn:ietf:params:xml:ns:xmpp-sasl\" mechanism=\"EXTERNAL\">");
sb.append(StringUtils.encodeBase64(localDomain));
sb.append("</auth>");
connection.deliverRawText(sb.toString());
Element response = reader.parseDocument().getRootElement();
return response != null && "success".equals(response.getName());
}
public LocalOutgoingServerSession(String localDomain, Connection connection, OutgoingServerSocketReader socketReader, StreamID streamID) {
super(localDomain, connection, streamID);
this.socketReader = socketReader;
socketReader.setSession(this);
}
@Override
boolean canProcess(Packet packet) {
final String senderDomain = packet.getFrom().getDomain();
final String recipDomain = packet.getTo().getDomain();
boolean processed = true;
if (!checkOutgoingDomainPair(senderDomain, recipDomain)) {
synchronized (("Auth::" + senderDomain).intern()) {
if (!checkOutgoingDomainPair(senderDomain, recipDomain) &&
!authenticateSubdomain(senderDomain, packet.getTo().getDomain())) {
// Return error since sender domain was not validated by remote server
processed = false;
}
}
}
if (!processed) {
returnErrorToSender(packet);
}
return processed;
}
@Override
void deliver(Packet packet) throws UnauthorizedException {
if (!conn.isClosed()) {
conn.deliver(packet);
}
}
@Override
public boolean authenticateSubdomain(String localDomain, String remoteDomain) {
if (!usingServerDialback) {
// Using SASL so just assume that the domain was validated
// (note: this may not be correct)
addOutgoingDomainPair(localDomain, remoteDomain);
return true;
}
ServerDialback method = new ServerDialback(getConnection(), localDomain);
if (method.authenticateDomain(socketReader, localDomain, remoteDomain, getStreamID().getID())) {
// Add the validated domain as an authenticated domain
addOutgoingDomainPair(localDomain, remoteDomain);
return true;
}
return false;
}
private void returnErrorToSender(Packet packet) {
RoutingTable routingTable = XMPPServer.getInstance().getRoutingTable();
if (packet.getError() != null) {
Log.debug("Possible double bounce: " + packet.toXML());
}
try {
if (packet instanceof IQ) {
if (((IQ) packet).isResponse()) {
Log.debug("XMPP specs forbid us to respond with an IQ error to: " + packet.toXML());
return;
}
IQ reply = new IQ();
reply.setID(packet.getID());
reply.setTo(packet.getFrom());
reply.setFrom(packet.getTo());
reply.setChildElement(((IQ) packet).getChildElement().createCopy());
reply.setType(IQ.Type.error);
reply.setError(PacketError.Condition.remote_server_not_found);
routingTable.routePacket(reply.getTo(), reply, true);
}
else if (packet instanceof Presence) {
if (((Presence)packet).getType() == Presence.Type.error) {
Log.debug("Double-bounce of presence: " + packet.toXML());
return;
}
Presence reply = new Presence();
reply.setID(packet.getID());
reply.setTo(packet.getFrom());
reply.setFrom(packet.getTo());
reply.setType(Presence.Type.error);
reply.setError(PacketError.Condition.remote_server_not_found);
routingTable.routePacket(reply.getTo(), reply, true);
}
else if (packet instanceof Message) {
if (((Message)packet).getType() == Message.Type.error){
Log.debug("Double-bounce of message: " + packet.toXML());
return;
}
Message reply = new Message();
reply.setID(packet.getID());
reply.setTo(packet.getFrom());
reply.setFrom(packet.getTo());
reply.setType(Message.Type.error);
reply.setThread(((Message)packet).getThread());
reply.setError(PacketError.Condition.remote_server_not_found);
routingTable.routePacket(reply.getTo(), reply, true);
}
}
catch (Exception e) {
Log.error("Error returning error to sender. Original packet: " + packet, e);
}
}
@Override
public String getAvailableStreamFeatures() {
// Nothing special to add
return null;
}
@Override
public void addOutgoingDomainPair(String localDomain, String remoteDomain) {
boolean found = false;
for (DomainPair domainPair : outgoingDomainPairs) {
if (domainPair.getRemote().equals(remoteDomain)) found = true;
}
outgoingDomainPairs.add(new DomainPair(localDomain, remoteDomain));
if (!found) {
XMPPServer.getInstance().getRoutingTable().addServerRoute(new JID(null, remoteDomain, null, true), this);
}
}
@Override
public boolean checkOutgoingDomainPair(String localDomain, String remoteDomain) {
return outgoingDomainPairs.contains(new DomainPair(localDomain, remoteDomain));
}
@Override
public Collection<DomainPair> getOutgoingDomainPairs() {
return outgoingDomainPairs;
}
}
src/java/org/jivesoftware/openfire/session/OutgoingServerSession.java
View file @ f26df50e
/*
* Copyright (C) 2005-2008 Jive Software. All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.jivesoftware.openfire.session;
import java.util.Collection;
/**
* Server-to-server communication is done using two TCP connections between the servers. One
* connection is used for sending packets while the other connection is used for receiving packets.
* The <tt>OutgoingServerSession</tt> represents the connection to a remote server that will only
* be used for sending packets.<p>
*
* Once the connection has been established with the remote server and at least a domain has been
* authenticated then a new route will be added to the routing table for this connection. For
* optimization reasons the same outgoing connection will be used even if the remote server has
* several hostnames. However, different routes will be created in the routing table for each
* hostname of the remote server.
*
* @author Gaston Dombiak
*/
public interface OutgoingServerSession extends ServerSession {
/**
* Authenticates a subdomain of this server with the specified remote server over an exsiting
* outgoing connection. If the existing session was using server dialback then a new db:result
* is going to be sent to the remote server. But if the existing session was TLS+SASL based
* then just assume that the subdomain was authenticated by the remote server.
*
* @param domain the locally domain to authenticate with the remote server.
* @param hostname the domain of the remote server.
* @return True if the domain was authenticated by the remote server.
*/
boolean authenticateSubdomain(String domain, String hostname);
/**
* Checks to see if a pair of domains has previously been authenticated.
*
* Since domains are authenticated as pairs, authenticating A->B does
* not imply anything about A-->C or D->B.
*
* @param local the local domain (previously: authenticated domain)
* @param remote the remote domain (previous: hostname)
* @return True if the pair of domains has been authenticated.
*/
boolean checkOutgoingDomainPair(String local, String remote);
/**
* Marks a domain pair as being authenticated.
*
* @param local the locally hosted domain.
* @param remote the remote domain.
*/
void addOutgoingDomainPair(String local, String remote);
/**
* Obtains all authenticated domain pairs.
*
* Most callers should avoid accessing this and use a simple check as above.
*
* @return collection of authenticated DomainPairs
*/
Collection<DomainPair> getOutgoingDomainPairs();
}
/*
* Copyright (C) 2005-2008 Jive Software. All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.jivesoftware.openfire.session;
import java.util.Collection;
/**
* Server-to-server communication is done using two TCP connections between the servers. One
* connection is used for sending packets while the other connection is used for receiving packets.
* The <tt>OutgoingServerSession</tt> represents the connection to a remote server that will only
* be used for sending packets.<p>
*
* Once the connection has been established with the remote server and at least a domain has been
* authenticated then a new route will be added to the routing table for this connection. For
* optimization reasons the same outgoing connection will be used even if the remote server has
* several hostnames. However, different routes will be created in the routing table for each
* hostname of the remote server.
*
* @author Gaston Dombiak
*/
public interface OutgoingServerSession extends ServerSession {
/**
* Authenticates a subdomain of this server with the specified remote server over an exsiting
* outgoing connection. If the existing session was using server dialback then a new db:result
* is going to be sent to the remote server. But if the existing session was TLS+SASL based
* then just assume that the subdomain was authenticated by the remote server.
*
* @param domain the locally domain to authenticate with the remote server.
* @param hostname the domain of the remote server.
* @return True if the domain was authenticated by the remote server.
*/
boolean authenticateSubdomain(String domain, String hostname);
/**
* Checks to see if a pair of domains has previously been authenticated.
*
* Since domains are authenticated as pairs, authenticating A->B does
* not imply anything about A-->C or D->B.
*
* @param local the local domain (previously: authenticated domain)
* @param remote the remote domain (previous: hostname)
* @return True if the pair of domains has been authenticated.
*/
boolean checkOutgoingDomainPair(String local, String remote);
/**
* Marks a domain pair as being authenticated.
*
* @param local the locally hosted domain.
* @param remote the remote domain.
*/
void addOutgoingDomainPair(String local, String remote);
/**
* Obtains all authenticated domain pairs.
*
* Most callers should avoid accessing this and use a simple check as above.
*
* @return collection of authenticated DomainPairs
*/
Collection<DomainPair> getOutgoingDomainPairs();
}
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