/*
*
* ((e)) emite: A pure gwt (Google Web Toolkit) xmpp (jabber) library
*
* (c) 2008-2009 The emite development team (see CREDITS for details)
* This file is part of emite.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
package com.calclab.emite.core.client.xmpp.sasl;
import com.calclab.emite.core.client.bosh.Connection;
import com.calclab.emite.core.client.packet.IPacket;
import com.calclab.emite.core.client.packet.Packet;
import com.calclab.emite.core.client.xmpp.sasl.AuthorizationTransaction.State;
import com.calclab.emite.core.client.xmpp.stanzas.XmppURI;
import com.calclab.suco.client.events.Event;
import com.calclab.suco.client.events.Listener;
public class SASLManager {
private static final String SEP = new String(new char[] { 0 });
private static final String XMLNS = "urn:ietf:params:xml:ns:xmpp-sasl";
public static final XmppURI ANONYMOUS = XmppURI.uri("anonymous", null, null);
private final Event<AuthorizationTransaction> onAuthorized;
private AuthorizationTransaction currentTransaction;
private final Connection connection;
public SASLManager(final Connection connection) {
this.connection = connection;
this.onAuthorized = new Event<AuthorizationTransaction>("saslManager:onAuthorized");
install();
}
public void onAuthorized(final Listener<AuthorizationTransaction> listener) {
onAuthorized.add(listener);
}
public void sendAuthorizationRequest(final AuthorizationTransaction authorizationTransaction) {
this.currentTransaction = authorizationTransaction;
final IPacket response = isAnonymous(authorizationTransaction) ? createAnonymousAuthorization()
: createPlainAuthorization(authorizationTransaction);
connection.send(response);
currentTransaction.setState(State.waitingForAuthorization);
}
private IPacket createAnonymousAuthorization() {
final IPacket auth = new Packet("auth", XMLNS).With("mechanism", "ANONYMOUS");
return auth;
}
private IPacket createPlainAuthorization(final AuthorizationTransaction authorizationTransaction) {
final IPacket auth = new Packet("auth", XMLNS).With("mechanism", "PLAIN");
final String encoded = encode(authorizationTransaction.uri.getHost(), authorizationTransaction.uri.getNode(),
authorizationTransaction.getPassword());
auth.setText(encoded);
return auth;
}
private String encode(final String domain, final String userName, final String password) {
final String auth = userName + "@" + domain + SEP + userName + SEP + password;
return Base64Coder.encodeString(auth);
}
private void install() {
connection.onStanzaReceived(new Listener<IPacket>() {
public void onEvent(final IPacket stanza) {
final String name = stanza.getName();
if ("failure".equals(name)) { // & XMLNS
currentTransaction.setState(State.failed);
onAuthorized.fire(currentTransaction);
currentTransaction = null;
} else if ("success".equals(name)) {
currentTransaction.setState(State.succeed);
onAuthorized.fire(currentTransaction);
currentTransaction = null;
}
}
});
}
private boolean isAnonymous(final AuthorizationTransaction authorizationTransaction) {
return authorizationTransaction.uri == SASLManager.ANONYMOUS;
}
}