1136 lines
46 KiB
Java
1136 lines
46 KiB
Java
/**
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*
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* Copyright 2017 Paul Schaub
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.jivesoftware.smackx.omemo;
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import static org.jivesoftware.smackx.omemo.util.OmemoConstants.BODY_OMEMO_HINT;
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import static org.jivesoftware.smackx.omemo.util.OmemoConstants.OMEMO_NAMESPACE_V_AXOLOTL;
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import static org.jivesoftware.smackx.omemo.util.OmemoConstants.PEP_NODE_DEVICE_LIST_NOTIFY;
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import java.security.NoSuchAlgorithmException;
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import java.util.ArrayList;
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import java.util.HashMap;
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import java.util.HashSet;
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import java.util.List;
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import java.util.Random;
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import java.util.Set;
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import java.util.SortedSet;
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import java.util.TreeMap;
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import java.util.WeakHashMap;
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import java.util.logging.Level;
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import java.util.logging.Logger;
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import org.jivesoftware.smack.Manager;
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import org.jivesoftware.smack.SmackException;
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import org.jivesoftware.smack.StanzaListener;
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import org.jivesoftware.smack.XMPPConnection;
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import org.jivesoftware.smack.XMPPException;
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import org.jivesoftware.smack.filter.StanzaFilter;
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import org.jivesoftware.smack.packet.ExtensionElement;
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import org.jivesoftware.smack.packet.Message;
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import org.jivesoftware.smack.packet.NamedElement;
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import org.jivesoftware.smack.packet.Stanza;
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import org.jivesoftware.smack.util.Async;
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import org.jivesoftware.smackx.carbons.CarbonCopyReceivedListener;
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import org.jivesoftware.smackx.carbons.CarbonManager;
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import org.jivesoftware.smackx.carbons.packet.CarbonExtension;
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import org.jivesoftware.smackx.disco.ServiceDiscoveryManager;
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import org.jivesoftware.smackx.eme.element.ExplicitMessageEncryptionElement;
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import org.jivesoftware.smackx.hints.element.StoreHint;
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import org.jivesoftware.smackx.mam.MamManager;
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import org.jivesoftware.smackx.muc.MultiUserChat;
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import org.jivesoftware.smackx.muc.MultiUserChatManager;
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import org.jivesoftware.smackx.muc.RoomInfo;
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import org.jivesoftware.smackx.omemo.element.OmemoDeviceListVAxolotlElement;
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import org.jivesoftware.smackx.omemo.element.OmemoElement;
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import org.jivesoftware.smackx.omemo.element.OmemoVAxolotlElement;
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import org.jivesoftware.smackx.omemo.exceptions.CannotEstablishOmemoSessionException;
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import org.jivesoftware.smackx.omemo.exceptions.CorruptedOmemoKeyException;
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import org.jivesoftware.smackx.omemo.exceptions.CryptoFailedException;
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import org.jivesoftware.smackx.omemo.exceptions.NoOmemoSupportException;
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import org.jivesoftware.smackx.omemo.exceptions.NoRawSessionException;
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import org.jivesoftware.smackx.omemo.exceptions.UndecidedOmemoIdentityException;
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import org.jivesoftware.smackx.omemo.internal.CachedDeviceList;
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import org.jivesoftware.smackx.omemo.internal.CipherAndAuthTag;
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import org.jivesoftware.smackx.omemo.internal.ClearTextMessage;
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import org.jivesoftware.smackx.omemo.internal.OmemoDevice;
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import org.jivesoftware.smackx.omemo.internal.OmemoMessageInformation;
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import org.jivesoftware.smackx.omemo.listener.OmemoMessageListener;
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import org.jivesoftware.smackx.omemo.listener.OmemoMucMessageListener;
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import org.jivesoftware.smackx.omemo.trust.OmemoFingerprint;
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import org.jivesoftware.smackx.omemo.trust.TrustCallback;
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import org.jivesoftware.smackx.omemo.trust.TrustState;
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import org.jivesoftware.smackx.pep.PEPListener;
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import org.jivesoftware.smackx.pep.PEPManager;
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import org.jivesoftware.smackx.pubsub.EventElement;
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import org.jivesoftware.smackx.pubsub.ItemsExtension;
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import org.jivesoftware.smackx.pubsub.PayloadItem;
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import org.jivesoftware.smackx.pubsub.PubSubException;
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import org.jivesoftware.smackx.pubsub.packet.PubSub;
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import org.jxmpp.jid.BareJid;
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import org.jxmpp.jid.DomainBareJid;
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import org.jxmpp.jid.EntityBareJid;
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import org.jxmpp.jid.EntityFullJid;
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/**
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* Manager that allows sending messages encrypted with OMEMO.
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* This class also provides some methods useful for a client that implements OMEMO.
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*
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* @author Paul Schaub
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*/
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public final class OmemoManager extends Manager {
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private static final Logger LOGGER = Logger.getLogger(OmemoManager.class.getName());
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private static final WeakHashMap<XMPPConnection, TreeMap<Integer,OmemoManager>> INSTANCES = new WeakHashMap<>();
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private final OmemoService<?, ?, ?, ?, ?, ?, ?, ?, ?> service;
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private final Object LOCK = new Object();
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private final HashSet<OmemoMessageListener> omemoMessageListeners = new HashSet<>();
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private final HashSet<OmemoMucMessageListener> omemoMucMessageListeners = new HashSet<>();
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private TrustCallback trustCallback;
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private BareJid ownJid;
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private Integer deviceId;
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/**
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* Private constructor to prevent multiple instances on a single connection (which probably would be bad!).
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*
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* @param connection connection
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*/
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private OmemoManager(XMPPConnection connection, Integer deviceId) {
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super(connection);
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service = OmemoService.getInstance();
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if (deviceId != null && deviceId <= 0) {
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throw new IllegalArgumentException("DeviceId MUST be greater than 0.");
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}
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this.deviceId = deviceId;
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// StanzaListeners
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startStanzaListeners();
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// Announce OMEMO support
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ServiceDiscoveryManager.getInstanceFor(connection).addFeature(PEP_NODE_DEVICE_LIST_NOTIFY);
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}
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/**
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* Return an OmemoManager instance for the given connection and deviceId.
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* If there was an OmemoManager for the connection and id before, return it. Otherwise create a new OmemoManager
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* instance and return it.
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* @param connection XmppConnection.
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* @param deviceId can be null, to generate a random deviceId. DeviceIds MUST NOT be less than 1.
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* @return
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*/
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public synchronized static OmemoManager getInstanceFor(XMPPConnection connection, Integer deviceId) {
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TreeMap<Integer,OmemoManager> managersOfConnection = INSTANCES.get(connection);
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if (managersOfConnection == null) {
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managersOfConnection = new TreeMap<>();
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INSTANCES.put(connection, managersOfConnection);
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}
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if (deviceId == null || deviceId < 1) {
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deviceId = randomDeviceId();
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}
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OmemoManager manager = managersOfConnection.get(deviceId);
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if (manager == null) {
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manager = new OmemoManager(connection, deviceId);
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managersOfConnection.put(deviceId, manager);
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}
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return manager;
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}
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/**
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* Returns an OmemoManager instance for the given connection. If there was no OmemoManager for that connection
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* before, create a new one. If there was one before, return it. If there were multiple managers before, return the
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* one with the lowest deviceId.
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* @param connection XmppConnection.
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* @return manager
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*/
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public synchronized static OmemoManager getInstanceFor(XMPPConnection connection) {
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TreeMap<Integer, OmemoManager> managers = INSTANCES.get(connection);
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if (managers == null) {
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managers = new TreeMap<>();
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INSTANCES.put(connection, managers);
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}
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OmemoManager manager;
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if (managers.size() == 0) {
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manager = new OmemoManager(connection, null);
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managers.put(null, manager);
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} else {
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manager = managers.get(managers.firstKey());
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}
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return manager;
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}
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/**
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* Set a TrustCallback for this particular OmemoManager.
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* @param callback trustCallback used to query and modify trust states.
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*/
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public void setTrustCallback(TrustCallback callback) {
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if (trustCallback != null) {
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throw new IllegalStateException("TrustCallback can only be set once.");
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}
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trustCallback = callback;
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}
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/**
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* Initializes the OmemoManager. This method must be called before the manager can be used.
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*
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* @throws CorruptedOmemoKeyException
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* @throws InterruptedException
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* @throws SmackException.NoResponseException
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* @throws SmackException.NotConnectedException
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* @throws XMPPException.XMPPErrorException
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* @throws SmackException.NotLoggedInException
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* @throws PubSubException.NotALeafNodeException
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*/
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public void initialize()
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throws SmackException.NotLoggedInException, CorruptedOmemoKeyException, InterruptedException,
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SmackException.NoResponseException, SmackException.NotConnectedException, XMPPException.XMPPErrorException,
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PubSubException.NotALeafNodeException {
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synchronized (LOCK) {
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if (!connection().isAuthenticated()) {
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throw new SmackException.NotLoggedInException();
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}
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// Set jid and deviceId
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this.ownJid = connection().getUser().asBareJid();
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if (deviceId == null) {
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SortedSet<Integer> localDeviceIds = getOmemoService().getOmemoStoreBackend().localDeviceIdsOf(ownJid);
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setDeviceId(localDeviceIds.size() > 0 ? localDeviceIds.first() : randomDeviceId());
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}
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getOmemoService().initialize(new KnownBareJidGuard(this));
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}
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}
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/**
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* Initialize the manager without blocking. Once the manager is successfully initialized, the finishedCallback will
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* be notified. It will also get notified, if an error occurs.
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* @param finishedCallback
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*/
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public void initializeAsync(final FinishedCallback finishedCallback) {
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Async.go(new Runnable() {
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@Override
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public void run() {
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try {
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initialize();
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finishedCallback.initializationFinished(OmemoManager.this);
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} catch (Exception e) {
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finishedCallback.initializationFailed(e);
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}
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}
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});
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}
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/**
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* OMEMO encrypt a cleartext message for a single recipient.
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* Note that this method does NOT set the 'to' attribute of the message.
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*
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* @param to recipients barejid
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* @param message text to encrypt
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* @return encrypted message
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* @throws CryptoFailedException when something crypto related fails
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* @throws UndecidedOmemoIdentityException When there are undecided devices
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* @throws NoSuchAlgorithmException
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* @throws InterruptedException
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* @throws CannotEstablishOmemoSessionException when we could not create session withs all of the recipients
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* devices.
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* @throws SmackException.NotConnectedException
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* @throws SmackException.NoResponseException
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*/
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public Message encrypt(BareJid to, String message)
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throws CryptoFailedException, UndecidedOmemoIdentityException, NoSuchAlgorithmException,
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InterruptedException, CannotEstablishOmemoSessionException, SmackException.NotConnectedException,
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SmackException.NoResponseException, SmackException.NotLoggedInException
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{
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synchronized (LOCK) {
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KnownBareJidGuard guard = new KnownBareJidGuard(this);
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Message plaintext = new Message();
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plaintext.setBody(message);
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OmemoVAxolotlElement encrypted = getOmemoService().processSendingMessage(guard, to, plaintext);
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return finishMessage(encrypted);
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}
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}
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/**
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* OMEMO encrypt a cleartext message for multiple recipients.
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*
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* @param recipients recipients barejids
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* @param message text to encrypt
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* @return encrypted message.
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* @throws CryptoFailedException When something crypto related fails
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* @throws UndecidedOmemoIdentityException When there are undecided devices.
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* @throws NoSuchAlgorithmException
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* @throws InterruptedException
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* @throws CannotEstablishOmemoSessionException When there is one recipient, for whom we failed to create a session
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* with every one of their devices.
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* @throws SmackException.NotConnectedException
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* @throws SmackException.NoResponseException
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*/
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public Message encrypt(ArrayList<BareJid> recipients, String message)
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throws CryptoFailedException, UndecidedOmemoIdentityException, NoSuchAlgorithmException,
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InterruptedException, CannotEstablishOmemoSessionException, SmackException.NotConnectedException,
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SmackException.NoResponseException, SmackException.NotLoggedInException
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{
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synchronized (LOCK) {
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Message m = new Message();
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m.setBody(message);
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OmemoVAxolotlElement encrypted = getOmemoService().processSendingMessage(
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new KnownBareJidGuard(this), recipients, m);
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return finishMessage(encrypted);
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}
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}
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/**
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* Encrypt a message for all recipients in the MultiUserChat.
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*
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* @param muc multiUserChat
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* @param message message to send
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* @return encrypted message
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* @throws UndecidedOmemoIdentityException when there are undecided devices.
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* @throws NoSuchAlgorithmException
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* @throws CryptoFailedException
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* @throws XMPPException.XMPPErrorException
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* @throws SmackException.NotConnectedException
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* @throws InterruptedException
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* @throws SmackException.NoResponseException
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* @throws NoOmemoSupportException When the muc doesn't support OMEMO.
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* @throws CannotEstablishOmemoSessionException when there is a user for whom we could not create a session
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* with any of their devices.
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*/
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public Message encrypt(MultiUserChat muc, String message)
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throws UndecidedOmemoIdentityException, NoSuchAlgorithmException, CryptoFailedException,
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XMPPException.XMPPErrorException, SmackException.NotConnectedException, InterruptedException,
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SmackException.NoResponseException, NoOmemoSupportException, CannotEstablishOmemoSessionException,
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SmackException.NotLoggedInException
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{
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synchronized (LOCK) {
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if (!multiUserChatSupportsOmemo(muc.getRoom())) {
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throw new NoOmemoSupportException();
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}
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Message m = new Message();
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m.setBody(message);
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ArrayList<BareJid> recipients = new ArrayList<>();
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for (EntityFullJid e : muc.getOccupants()) {
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recipients.add(muc.getOccupant(e).getJid().asBareJid());
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}
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return encrypt(recipients, message);
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}
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}
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/**
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* Encrypt a message for all users we could build a session with successfully in a previous attempt.
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* This method can come in handy as a fallback when encrypting a message fails due to devices we cannot
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* build a session with.
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*
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* @param exception CannotEstablishSessionException from a previous encrypt(user(s), message) call.
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* @param message message we want to send.
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* @return encrypted message
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* @throws CryptoFailedException
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* @throws UndecidedOmemoIdentityException when there are undecided identities.
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*/
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public Message encryptForExistingSessions(CannotEstablishOmemoSessionException exception, String message)
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throws CryptoFailedException, UndecidedOmemoIdentityException, SmackException.NotLoggedInException
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{
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synchronized (LOCK) {
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Message m = new Message();
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m.setBody(message);
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OmemoVAxolotlElement encrypted = getOmemoService()
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.encryptOmemoMessage(new KnownBareJidGuard(this), exception.getSuccesses(), m);
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return finishMessage(encrypted);
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}
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}
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/**
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* Decrypt an OMEMO message. This method comes handy when dealing with messages that were not automatically
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* decrypted by smack-omemo, eg. MAM query messages.
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* @param sender sender of the message
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* @param omemoMessage message
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* @return decrypted message
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* @throws InterruptedException Exception
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* @throws SmackException.NoResponseException Exception
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* @throws SmackException.NotConnectedException Exception
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* @throws CryptoFailedException When decryption fails
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* @throws XMPPException.XMPPErrorException Exception
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* @throws CorruptedOmemoKeyException When the used keys are invalid
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* @throws NoRawSessionException When there is no double ratchet session found for this message
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*/
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public ClearTextMessage decrypt(BareJid sender, Message omemoMessage)
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throws InterruptedException, SmackException.NoResponseException, SmackException.NotConnectedException,
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CryptoFailedException, XMPPException.XMPPErrorException, CorruptedOmemoKeyException, NoRawSessionException,
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SmackException.NotLoggedInException
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{
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synchronized (LOCK) {
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return getOmemoService().processLocalMessage(new KnownBareJidGuard(this), sender, omemoMessage);
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}
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}
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/**
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* Return a list of all OMEMO messages that were found in the MAM query result, that could be successfully
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* decrypted. Normal cleartext messages are also added to this list.
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*
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* @param mamQueryResult mamQueryResult
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* @return list of decrypted OmemoMessages
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* @throws InterruptedException Exception
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* @throws XMPPException.XMPPErrorException Exception
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* @throws SmackException.NotConnectedException Exception
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* @throws SmackException.NoResponseException Exception
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*/
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public List<ClearTextMessage> decryptMamQueryResult(MamManager.MamQueryResult mamQueryResult)
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throws InterruptedException, XMPPException.XMPPErrorException, SmackException.NotConnectedException,
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SmackException.NoResponseException, SmackException.NotLoggedInException
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{
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synchronized (LOCK) {
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List<ClearTextMessage> l = new ArrayList<>();
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l.addAll(getOmemoService().decryptMamQueryResult(new KnownBareJidGuard(this), mamQueryResult));
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return l;
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}
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}
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/**
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* Trust that a fingerprint belongs to an OmemoDevice.
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* The fingerprint must be the lowercase, hexadecimal fingerprint of the identityKey of the device and must
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* be of length 64.
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* @param device device
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* @param fingerprint fingerprint
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*/
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public void trustOmemoIdentity(OmemoDevice device, OmemoFingerprint fingerprint) {
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if (trustCallback == null) {
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throw new IllegalStateException("No TrustCallback set.");
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}
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trustCallback.setTrust(device, fingerprint, TrustState.trusted);
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}
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/**
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* Distrust the fingerprint/OmemoDevice tuple.
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* The fingerprint must be the lowercase, hexadecimal fingerprint of the identityKey of the device and must
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* be of length 64.
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* @param device device
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* @param fingerprint fingerprint
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*/
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public void distrustOmemoIdentity(OmemoDevice device, OmemoFingerprint fingerprint) {
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if (trustCallback == null) {
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throw new IllegalStateException("No TrustCallback set.");
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}
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trustCallback.setTrust(device, fingerprint, TrustState.untrusted);
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}
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/**
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* Returns true, if the fingerprint/OmemoDevice tuple is trusted, otherwise false.
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* The fingerprint must be the lowercase, hexadecimal fingerprint of the identityKey of the device and must
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* be of length 64.
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* @param device device
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* @param fingerprint fingerprint
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* @return
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*/
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public boolean isTrustedOmemoIdentity(OmemoDevice device, OmemoFingerprint fingerprint) {
|
|
if (trustCallback == null) {
|
|
throw new IllegalStateException("No TrustCallback set.");
|
|
}
|
|
|
|
return trustCallback.getTrust(device, fingerprint) == TrustState.trusted;
|
|
}
|
|
|
|
/**
|
|
* Returns true, if the fingerprint/OmemoDevice tuple is decided by the user.
|
|
* The fingerprint must be the lowercase, hexadecimal fingerprint of the identityKey of the device and must
|
|
* be of length 64.
|
|
* @param device device
|
|
* @param fingerprint fingerprint
|
|
* @return
|
|
*/
|
|
public boolean isDecidedOmemoIdentity(OmemoDevice device, OmemoFingerprint fingerprint) {
|
|
if (trustCallback == null) {
|
|
throw new IllegalStateException("No TrustCallback set.");
|
|
}
|
|
|
|
return trustCallback.getTrust(device, fingerprint) != TrustState.undecided;
|
|
}
|
|
|
|
/**
|
|
* Clear all other devices except this one from our device list and republish the list.
|
|
*
|
|
* @throws InterruptedException
|
|
* @throws SmackException
|
|
* @throws XMPPException.XMPPErrorException
|
|
* @throws CorruptedOmemoKeyException
|
|
*/
|
|
public void purgeDeviceList()
|
|
throws SmackException, InterruptedException, XMPPException.XMPPErrorException, CorruptedOmemoKeyException
|
|
{
|
|
synchronized (LOCK) {
|
|
KnownBareJidGuard managerGuard = new KnownBareJidGuard(this);
|
|
getOmemoService().publishDeviceIdIfNeeded(managerGuard, true);
|
|
getOmemoService().publishBundle(managerGuard);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Generate fresh identity keys and bundle and publish it to the server.
|
|
* @throws SmackException
|
|
* @throws InterruptedException
|
|
* @throws XMPPException.XMPPErrorException
|
|
* @throws CorruptedOmemoKeyException
|
|
*/
|
|
public void regenerateIdentity()
|
|
throws SmackException, InterruptedException, XMPPException.XMPPErrorException, CorruptedOmemoKeyException
|
|
{
|
|
synchronized (LOCK) {
|
|
KnownBareJidGuard managerGuard = new KnownBareJidGuard(this);
|
|
// create a new identity and publish new keys to the server
|
|
getOmemoService().regenerate(managerGuard);
|
|
getOmemoService().publishDeviceIdIfNeeded(managerGuard, false);
|
|
getOmemoService().publishBundle(managerGuard);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Send a ratchet update message. This can be used to advance the ratchet of a session in order to maintain forward
|
|
* secrecy.
|
|
*
|
|
* @param recipient recipient
|
|
* @throws UndecidedOmemoIdentityException When the trust of session with the recipient is not decided yet
|
|
* @throws CorruptedOmemoKeyException When the used identityKeys are corrupted
|
|
* @throws CryptoFailedException When something fails with the crypto
|
|
* @throws CannotEstablishOmemoSessionException When we can't establish a session with the recipient
|
|
*/
|
|
public void sendRatchetUpdateMessage(OmemoDevice recipient)
|
|
throws CorruptedOmemoKeyException, UndecidedOmemoIdentityException, CryptoFailedException,
|
|
CannotEstablishOmemoSessionException, SmackException.NotLoggedInException
|
|
{
|
|
synchronized (LOCK) {
|
|
getOmemoService().sendOmemoRatchetUpdateMessage(
|
|
new KnownBareJidGuard(this), recipient, false);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Create a new KeyTransportElement. This message will contain the AES-Key and IV that can be used eg. for encrypted
|
|
* Jingle file transfer.
|
|
*
|
|
* @param aesKey AES key to transport
|
|
* @param iv Initialization vector
|
|
* @param to list of recipient devices
|
|
* @return KeyTransportMessage
|
|
* @throws UndecidedOmemoIdentityException When the trust of session with the recipient is not decided yet
|
|
* @throws CorruptedOmemoKeyException When the used identityKeys are corrupted
|
|
* @throws CryptoFailedException When something fails with the crypto
|
|
* @throws CannotEstablishOmemoSessionException When we can't establish a session with the recipient
|
|
*/
|
|
public OmemoVAxolotlElement createKeyTransportElement(byte[] aesKey, byte[] iv, OmemoDevice ... to)
|
|
throws UndecidedOmemoIdentityException, CorruptedOmemoKeyException, CryptoFailedException,
|
|
CannotEstablishOmemoSessionException, SmackException.NotLoggedInException
|
|
{
|
|
synchronized (LOCK) {
|
|
return getOmemoService().prepareOmemoKeyTransportElement(
|
|
new KnownBareJidGuard(this), aesKey, iv, to);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Create a new Message from a encrypted OmemoMessageElement.
|
|
* Add ourselves as the sender and the encrypted element.
|
|
* Also tell the server to store the message despite a possible missing body.
|
|
* The body will be set to a hint message that we are using OMEMO.
|
|
*
|
|
* @param encrypted OmemoMessageElement
|
|
* @return Message containing the OMEMO element and some additional information
|
|
*/
|
|
Message finishMessage(OmemoVAxolotlElement encrypted) {
|
|
if (encrypted == null) {
|
|
return null;
|
|
}
|
|
|
|
Message chatMessage = new Message();
|
|
chatMessage.setFrom(connection().getUser().asBareJid());
|
|
chatMessage.addExtension(encrypted);
|
|
|
|
if (OmemoConfiguration.getAddOmemoHintBody()) {
|
|
chatMessage.setBody(BODY_OMEMO_HINT);
|
|
}
|
|
|
|
if (OmemoConfiguration.getAddMAMStorageProcessingHint()) {
|
|
StoreHint.set(chatMessage);
|
|
}
|
|
|
|
if (OmemoConfiguration.getAddEmeEncryptionHint()) {
|
|
chatMessage.addExtension(new ExplicitMessageEncryptionElement(
|
|
ExplicitMessageEncryptionElement.ExplicitMessageEncryptionProtocol.omemoVAxolotl));
|
|
}
|
|
|
|
return chatMessage;
|
|
}
|
|
|
|
/**
|
|
* Returns true, if the contact has any active devices published in a deviceList.
|
|
*
|
|
* @param contact contact
|
|
* @return true if contact has at least one OMEMO capable device.
|
|
* @throws SmackException.NotConnectedException
|
|
* @throws InterruptedException
|
|
* @throws SmackException.NoResponseException
|
|
*/
|
|
public boolean contactSupportsOmemo(BareJid contact)
|
|
throws SmackException.NotConnectedException, InterruptedException, SmackException.NoResponseException,
|
|
SmackException.NotLoggedInException
|
|
{
|
|
synchronized (LOCK) {
|
|
KnownBareJidGuard managerGuard = new KnownBareJidGuard(this);
|
|
|
|
getOmemoService().refreshDeviceList(managerGuard, contact);
|
|
return !getOmemoService().getOmemoStoreBackend().loadCachedDeviceList(getOwnDevice(), contact)
|
|
.getActiveDevices().isEmpty();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Returns true, if the MUC with the EntityBareJid multiUserChat is non-anonymous and members only (prerequisite
|
|
* for OMEMO encryption in MUC).
|
|
*
|
|
* @param multiUserChat EntityBareJid of the MUC
|
|
* @return true if chat supports OMEMO
|
|
* @throws XMPPException.XMPPErrorException if
|
|
* @throws SmackException.NotConnectedException something
|
|
* @throws InterruptedException goes
|
|
* @throws SmackException.NoResponseException wrong
|
|
*/
|
|
public boolean multiUserChatSupportsOmemo(EntityBareJid multiUserChat)
|
|
throws XMPPException.XMPPErrorException, SmackException.NotConnectedException, InterruptedException,
|
|
SmackException.NoResponseException
|
|
{
|
|
RoomInfo roomInfo = MultiUserChatManager.getInstanceFor(connection()).getRoomInfo(multiUserChat);
|
|
return roomInfo.isNonanonymous() && roomInfo.isMembersOnly();
|
|
}
|
|
|
|
/**
|
|
* Returns true, if the Server supports PEP.
|
|
*
|
|
* @param connection XMPPConnection
|
|
* @param server domainBareJid of the server to test
|
|
* @return true if server supports pep
|
|
* @throws XMPPException.XMPPErrorException
|
|
* @throws SmackException.NotConnectedException
|
|
* @throws InterruptedException
|
|
* @throws SmackException.NoResponseException
|
|
*/
|
|
public static boolean serverSupportsOmemo(XMPPConnection connection, DomainBareJid server)
|
|
throws XMPPException.XMPPErrorException, SmackException.NotConnectedException, InterruptedException,
|
|
SmackException.NoResponseException
|
|
{
|
|
return ServiceDiscoveryManager.getInstanceFor(connection)
|
|
.discoverInfo(server).containsFeature(PubSub.NAMESPACE);
|
|
}
|
|
|
|
/**
|
|
* Return the fingerprint of our identity key.
|
|
*
|
|
* @return fingerprint
|
|
*/
|
|
public OmemoFingerprint getOwnFingerprint()
|
|
throws SmackException.NotLoggedInException, CorruptedOmemoKeyException
|
|
{
|
|
synchronized (LOCK) {
|
|
if (getOwnJid() == null) {
|
|
throw new SmackException.NotLoggedInException();
|
|
}
|
|
|
|
return getOmemoService().getOmemoStoreBackend().getFingerprint(getOwnDevice());
|
|
}
|
|
}
|
|
|
|
public OmemoFingerprint getFingerprint(OmemoDevice device)
|
|
throws CannotEstablishOmemoSessionException, SmackException.NotLoggedInException,
|
|
CorruptedOmemoKeyException
|
|
{
|
|
synchronized (LOCK) {
|
|
if (getOwnJid() == null) {
|
|
throw new SmackException.NotLoggedInException();
|
|
}
|
|
|
|
if (device.equals(getOwnDevice())) {
|
|
return getOwnFingerprint();
|
|
}
|
|
|
|
return getOmemoService().getOmemoStoreBackend().getFingerprint(new KnownBareJidGuard(this), device);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Return all fingerprints of active devices of a contact.
|
|
* @param contact contact
|
|
* @return HashMap of deviceIds and corresponding fingerprints.
|
|
*/
|
|
public HashMap<OmemoDevice, OmemoFingerprint> getActiveFingerprints(BareJid contact)
|
|
throws SmackException.NotLoggedInException, CorruptedOmemoKeyException,
|
|
CannotEstablishOmemoSessionException
|
|
{
|
|
synchronized (LOCK) {
|
|
if (getOwnJid() == null) {
|
|
throw new SmackException.NotLoggedInException();
|
|
}
|
|
|
|
HashMap<OmemoDevice, OmemoFingerprint> fingerprints = new HashMap<>();
|
|
CachedDeviceList deviceList = getOmemoService().getOmemoStoreBackend()
|
|
.loadCachedDeviceList(getOwnDevice(), contact);
|
|
|
|
for (int id : deviceList.getActiveDevices()) {
|
|
OmemoDevice device = new OmemoDevice(contact, id);
|
|
OmemoFingerprint fingerprint = getFingerprint(device);
|
|
|
|
if (fingerprint != null) {
|
|
fingerprints.put(device, fingerprint);
|
|
}
|
|
}
|
|
|
|
return fingerprints;
|
|
}
|
|
}
|
|
|
|
public void addOmemoMessageListener(OmemoMessageListener listener) {
|
|
omemoMessageListeners.add(listener);
|
|
}
|
|
|
|
public void removeOmemoMessageListener(OmemoMessageListener listener) {
|
|
omemoMessageListeners.remove(listener);
|
|
}
|
|
|
|
public void addOmemoMucMessageListener(OmemoMucMessageListener listener) {
|
|
omemoMucMessageListeners.add(listener);
|
|
}
|
|
|
|
public void removeOmemoMucMessageListener(OmemoMucMessageListener listener) {
|
|
omemoMucMessageListeners.remove(listener);
|
|
}
|
|
|
|
/**
|
|
* Build OMEMO sessions with devices of contact.
|
|
*
|
|
* @param contact contact we want to build session with.
|
|
* @throws InterruptedException
|
|
* @throws CannotEstablishOmemoSessionException
|
|
* @throws SmackException.NotConnectedException
|
|
* @throws SmackException.NoResponseException
|
|
*/
|
|
public void buildSessionsWith(BareJid contact)
|
|
throws InterruptedException, CannotEstablishOmemoSessionException, SmackException.NotConnectedException,
|
|
SmackException.NoResponseException, SmackException.NotLoggedInException
|
|
{
|
|
synchronized (LOCK) {
|
|
getOmemoService().buildMissingOmemoSessions(new KnownBareJidGuard(this), contact);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Request a deviceList update from contact contact.
|
|
*
|
|
* @param contact contact we want to obtain the deviceList from.
|
|
* @throws SmackException.NotConnectedException
|
|
* @throws InterruptedException
|
|
* @throws SmackException.NoResponseException
|
|
*/
|
|
public void requestDeviceListUpdateFor(BareJid contact)
|
|
throws SmackException.NotConnectedException, InterruptedException, SmackException.NoResponseException,
|
|
SmackException.NotLoggedInException
|
|
{
|
|
synchronized (LOCK) {
|
|
getOmemoService().refreshDeviceList(new KnownBareJidGuard(this), contact);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Rotate the signedPreKey published in our OmemoBundle. This should be done every now and then (7-14 days).
|
|
* The old signedPreKey should be kept for some more time (a month or so) to enable decryption of messages
|
|
* that have been sent since the key was changed.
|
|
*
|
|
* @throws CorruptedOmemoKeyException When the IdentityKeyPair is damaged.
|
|
* @throws InterruptedException XMPP error
|
|
* @throws XMPPException.XMPPErrorException XMPP error
|
|
* @throws SmackException.NotConnectedException XMPP error
|
|
* @throws SmackException.NoResponseException XMPP error
|
|
* @throws PubSubException.NotALeafNodeException if the bundle node on the server is a CollectionNode
|
|
*/
|
|
public void rotateSignedPreKey()
|
|
throws CorruptedOmemoKeyException, InterruptedException, XMPPException.XMPPErrorException,
|
|
SmackException.NotConnectedException, SmackException.NoResponseException,
|
|
PubSubException.NotALeafNodeException, SmackException.NotLoggedInException
|
|
{
|
|
synchronized (LOCK) {
|
|
KnownBareJidGuard managerGuard = new KnownBareJidGuard(this);
|
|
// generate key
|
|
getOmemoService().getOmemoStoreBackend().changeSignedPreKey(getOwnDevice());
|
|
// publish
|
|
getOmemoService().publishDeviceIdIfNeeded(managerGuard, false);
|
|
getOmemoService().publishBundle(managerGuard);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Return true, if the given Stanza contains an OMEMO element 'encrypted'.
|
|
* @param stanza stanza
|
|
* @return true if stanza has extension 'encrypted'
|
|
*/
|
|
public static boolean stanzaContainsOmemoElement(Stanza stanza) {
|
|
return stanza.hasExtension(OmemoElement.ENCRYPTED, OMEMO_NAMESPACE_V_AXOLOTL);
|
|
}
|
|
|
|
/**
|
|
* Throw an IllegalStateException if no OmemoService is set.
|
|
*/
|
|
private void throwIfNoServiceSet() {
|
|
if (service == null) {
|
|
throw new IllegalStateException("No OmemoService set in OmemoManager.");
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Returns a pseudo random number from the interval [1, Integer.MAX_VALUE].
|
|
* @return deviceId
|
|
*/
|
|
public static int randomDeviceId() {
|
|
return new Random().nextInt(Integer.MAX_VALUE - 1) + 1;
|
|
}
|
|
|
|
/**
|
|
* Return the BareJid of the user.
|
|
*
|
|
* @return bareJid
|
|
*/
|
|
public BareJid getOwnJid() {
|
|
if (ownJid == null && connection().isAuthenticated()) {
|
|
ownJid = connection().getUser().asBareJid();
|
|
}
|
|
|
|
return ownJid;
|
|
}
|
|
|
|
/**
|
|
* Return the deviceId of this OmemoManager.
|
|
*
|
|
* @return deviceId
|
|
*/
|
|
public Integer getDeviceId() {
|
|
synchronized (LOCK) {
|
|
return deviceId;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Return the OmemoDevice of the user.
|
|
*
|
|
* @return omemoDevice
|
|
*/
|
|
public OmemoDevice getOwnDevice() {
|
|
synchronized (LOCK) {
|
|
BareJid jid = getOwnJid();
|
|
if (jid == null) {
|
|
return null;
|
|
}
|
|
return new OmemoDevice(jid, getDeviceId());
|
|
}
|
|
}
|
|
|
|
void setDeviceId(int nDeviceId) {
|
|
synchronized (LOCK) {
|
|
// Move this instance inside the HashMaps
|
|
INSTANCES.get(connection()).remove(getDeviceId());
|
|
INSTANCES.get(connection()).put(nDeviceId, this);
|
|
|
|
this.deviceId = nDeviceId;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Notify all registered OmemoMessageListeners about a received OmemoMessage.
|
|
*
|
|
* @param decryptedBody decrypted Body element of the message
|
|
* @param encryptedMessage unmodified message as it was received
|
|
* @param wrappingMessage message that wrapped the incoming message
|
|
* @param messageInformation information about the messages encryption (used identityKey, carbon...)
|
|
*/
|
|
void notifyOmemoMessageReceived(String decryptedBody,
|
|
Message encryptedMessage,
|
|
Message wrappingMessage,
|
|
OmemoMessageInformation messageInformation)
|
|
{
|
|
for (OmemoMessageListener l : omemoMessageListeners) {
|
|
l.onOmemoMessageReceived(decryptedBody, encryptedMessage, wrappingMessage, messageInformation);
|
|
}
|
|
}
|
|
|
|
void notifyOmemoKeyTransportMessageReceived(CipherAndAuthTag cipherAndAuthTag,
|
|
Message transportingMessage,
|
|
Message wrappingMessage,
|
|
OmemoMessageInformation information)
|
|
{
|
|
for (OmemoMessageListener l : omemoMessageListeners) {
|
|
l.onOmemoKeyTransportReceived(cipherAndAuthTag, transportingMessage, wrappingMessage, information);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Notify all registered OmemoMucMessageListeners of an incoming OmemoMessageElement in a MUC.
|
|
*
|
|
* @param muc MultiUserChat the message was received in
|
|
* @param from BareJid of the user that sent the message
|
|
* @param decryptedBody decrypted body
|
|
* @param message original message with encrypted content
|
|
* @param wrappingMessage wrapping message (in case of carbon copy)
|
|
* @param omemoInformation information about the encryption of the message
|
|
*/
|
|
void notifyOmemoMucMessageReceived(MultiUserChat muc,
|
|
BareJid from,
|
|
String decryptedBody,
|
|
Message message,
|
|
Message wrappingMessage,
|
|
OmemoMessageInformation omemoInformation)
|
|
{
|
|
for (OmemoMucMessageListener l : omemoMucMessageListeners) {
|
|
l.onOmemoMucMessageReceived(muc, from, decryptedBody, message,
|
|
wrappingMessage, omemoInformation);
|
|
}
|
|
}
|
|
|
|
void notifyOmemoMucKeyTransportMessageReceived(MultiUserChat muc,
|
|
BareJid from,
|
|
CipherAndAuthTag cipherAndAuthTag,
|
|
Message transportingMessage,
|
|
Message wrappingMessage,
|
|
OmemoMessageInformation messageInformation)
|
|
{
|
|
for (OmemoMucMessageListener l : omemoMucMessageListeners) {
|
|
l.onOmemoKeyTransportReceived(muc, from, cipherAndAuthTag,
|
|
transportingMessage, wrappingMessage, messageInformation);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Register stanza listeners needed for OMEMO.
|
|
* This method is called automatically in the constructor and should only be used to restore the previous state
|
|
* after {@link #stopListeners()} was called.
|
|
*/
|
|
public void startStanzaListeners() {
|
|
PEPManager pepManager = PEPManager.getInstanceFor(connection());
|
|
pepManager.removePEPListener(deviceListUpdateListener);
|
|
pepManager.addPEPListener(deviceListUpdateListener);
|
|
connection().removeAsyncStanzaListener(internalOmemoMessageStanzaListener);
|
|
connection().addAsyncStanzaListener(internalOmemoMessageStanzaListener, omemoMessageStanzaFilter);
|
|
CarbonManager carbonManager = CarbonManager.getInstanceFor(connection());
|
|
carbonManager.removeCarbonCopyReceivedListener(internalOmemoCarbonCopyListener);
|
|
carbonManager.addCarbonCopyReceivedListener(internalOmemoCarbonCopyListener);
|
|
}
|
|
|
|
/**
|
|
* Remove active stanza listeners needed for OMEMO.
|
|
*/
|
|
public void stopListeners() {
|
|
PEPManager.getInstanceFor(connection()).removePEPListener(deviceListUpdateListener);
|
|
connection().removeAsyncStanzaListener(internalOmemoMessageStanzaListener);
|
|
CarbonManager.getInstanceFor(connection()).removeCarbonCopyReceivedListener(internalOmemoCarbonCopyListener);
|
|
}
|
|
|
|
/**
|
|
* Get our connection.
|
|
*
|
|
* @return the connection of this manager
|
|
*/
|
|
XMPPConnection getConnection() {
|
|
return connection();
|
|
}
|
|
|
|
/**
|
|
* Return the OMEMO service object.
|
|
*
|
|
* @return omemoService
|
|
*/
|
|
OmemoService<?,?,?,?,?,?,?,?,?> getOmemoService() {
|
|
throwIfNoServiceSet();
|
|
return service;
|
|
}
|
|
|
|
private final PEPListener deviceListUpdateListener = new PEPListener() {
|
|
|
|
KnownBareJidGuard managerGuard = null;
|
|
|
|
@Override
|
|
public void eventReceived(EntityBareJid from, EventElement event, Message message) {
|
|
|
|
if (managerGuard == null) {
|
|
try {
|
|
managerGuard = new KnownBareJidGuard(OmemoManager.this);
|
|
} catch (SmackException.NotLoggedInException e) {
|
|
throw new AssertionError(e);
|
|
}
|
|
}
|
|
|
|
for (ExtensionElement items : event.getExtensions()) {
|
|
if (!(items instanceof ItemsExtension)) {
|
|
continue;
|
|
}
|
|
|
|
for (NamedElement item : ((ItemsExtension) items).getItems()) {
|
|
if (!(item instanceof PayloadItem<?>)) {
|
|
continue;
|
|
}
|
|
|
|
PayloadItem<?> payloadItem = (PayloadItem<?>) item;
|
|
|
|
if (!(payloadItem.getPayload() instanceof OmemoDeviceListVAxolotlElement)) {
|
|
continue;
|
|
}
|
|
|
|
// Device List <list>
|
|
OmemoDeviceListVAxolotlElement omemoDeviceListElement =
|
|
(OmemoDeviceListVAxolotlElement) payloadItem.getPayload();
|
|
Integer ourDeviceId = getDeviceId();
|
|
|
|
getOmemoService().getOmemoStoreBackend()
|
|
.mergeCachedDeviceList(managerGuard.get().getOwnDevice(), from, omemoDeviceListElement);
|
|
|
|
if (from == null) {
|
|
// Unknown sender, no more work to do.
|
|
// TODO: This DOES happen for some reason. Figure out when...
|
|
continue;
|
|
}
|
|
|
|
if (!from.equals(getOwnJid())) {
|
|
// Not our deviceList, so nothing more to do
|
|
continue;
|
|
}
|
|
|
|
if (omemoDeviceListElement.getDeviceIds().contains(ourDeviceId)) {
|
|
// We are on the list. Nothing more to do
|
|
continue;
|
|
}
|
|
|
|
// Our deviceList and we are not on it! We don't want to miss all the action!!!
|
|
LOGGER.log(Level.INFO, "Our deviceId was not on the list!");
|
|
Set<Integer> deviceListIds = omemoDeviceListElement.copyDeviceIds();
|
|
|
|
// enroll at the deviceList
|
|
deviceListIds.add(ourDeviceId);
|
|
final OmemoDeviceListVAxolotlElement newOmemoDeviceListElement =
|
|
new OmemoDeviceListVAxolotlElement(deviceListIds);
|
|
|
|
// PEPListener is a synchronous listener.
|
|
// Avoid any deadlocks by using an async task to update the device list.
|
|
Async.go(new Runnable() {
|
|
@Override
|
|
public void run() {
|
|
try {
|
|
OmemoService.publishDeviceIds(managerGuard, newOmemoDeviceListElement);
|
|
}
|
|
catch (SmackException | InterruptedException | XMPPException.XMPPErrorException e) {
|
|
// TODO: It might be dangerous NOT to retry publishing our deviceId
|
|
LOGGER.log(Level.SEVERE, "Could not publish our device list after an update " +
|
|
"without our id was received: " + e.getMessage());
|
|
}
|
|
}
|
|
});
|
|
}
|
|
}
|
|
}
|
|
};
|
|
|
|
private final StanzaListener internalOmemoMessageStanzaListener = new StanzaListener() {
|
|
@Override
|
|
public void processStanza(Stanza packet) throws SmackException.NotConnectedException, InterruptedException {
|
|
try {
|
|
getOmemoService().onOmemoMessageStanzaReceived(packet,
|
|
new KnownBareJidGuard(OmemoManager.this));
|
|
} catch (SmackException.NotLoggedInException e) {
|
|
LOGGER.warning("Received OMEMO stanza while being offline: " + e);
|
|
}
|
|
}
|
|
};
|
|
|
|
private final CarbonCopyReceivedListener internalOmemoCarbonCopyListener = new CarbonCopyReceivedListener() {
|
|
@Override
|
|
public void onCarbonCopyReceived(CarbonExtension.Direction direction,
|
|
Message carbonCopy,
|
|
Message wrappingMessage) {
|
|
if (omemoMessageStanzaFilter.accept(carbonCopy)) {
|
|
try {
|
|
getOmemoService().onOmemoCarbonCopyReceived(direction, carbonCopy, wrappingMessage,
|
|
new KnownBareJidGuard(OmemoManager.this));
|
|
} catch (SmackException.NotLoggedInException e) {
|
|
LOGGER.warning("Received OMEMO carbon copy while being offline: " + e);
|
|
}
|
|
}
|
|
}
|
|
};
|
|
|
|
/**
|
|
* StanzaFilter that filters messages containing a OMEMO element.
|
|
*/
|
|
private final StanzaFilter omemoMessageStanzaFilter = new StanzaFilter() {
|
|
@Override
|
|
public boolean accept(Stanza stanza) {
|
|
return stanza instanceof Message && OmemoManager.stanzaContainsOmemoElement(stanza);
|
|
}
|
|
};
|
|
|
|
public static class KnownBareJidGuard {
|
|
|
|
private final OmemoManager manager;
|
|
|
|
public KnownBareJidGuard(OmemoManager manager)
|
|
throws SmackException.NotLoggedInException {
|
|
|
|
if (manager == null) {
|
|
throw new IllegalArgumentException("OmemoManager cannot be null.");
|
|
}
|
|
|
|
if (manager.getOwnJid() == null) {
|
|
if (manager.getConnection().isAuthenticated()) {
|
|
manager.ownJid = manager.getConnection().getUser().asBareJid();
|
|
} else {
|
|
throw new SmackException.NotLoggedInException();
|
|
}
|
|
}
|
|
|
|
this.manager = manager;
|
|
}
|
|
|
|
public OmemoManager get() {
|
|
return manager;
|
|
}
|
|
}
|
|
|
|
public interface FinishedCallback {
|
|
|
|
void initializationFinished(OmemoManager manager);
|
|
|
|
void initializationFailed(Exception cause);
|
|
}
|
|
}
|