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DummyClient.java
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/*
* Copyright @ 2015 Atlassian Pty Ltd
*
* 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 net.java.otr4j.session;
import java.security.KeyPair;
import java.util.LinkedList;
import java.util.List;
import java.util.Queue;
import java.util.logging.Logger;
import net.java.otr4j.OtrEngineHost;
import net.java.otr4j.OtrException;
import net.java.otr4j.OtrPolicy;
import net.java.otr4j.crypto.OtrCryptoEngineImpl;
import net.java.otr4j.crypto.OtrCryptoException;
/**
* @author George Politis
*/
public class DummyClient {
private static Logger logger = Logger.getLogger(SessionImplTest.class
.getName());
private final String account;
private Session session;
private OtrPolicy policy;
private Connection connection;
private MessageProcessor processor;
private Queue<ProcessedMessage> processedMsgs = new LinkedList<ProcessedMessage>();
public DummyClient(String account) {
this.account = account;
}
public Session getSession() {
return session;
}
public String getAccount() {
return account;
}
public void setPolicy(OtrPolicy policy) {
this.policy = policy;
}
public void send(String recipient, String s) throws OtrException {
if (session == null) {
final SessionID sessionID = new SessionID(account, recipient, "DummyProtocol");
session = new SessionImpl(sessionID, new DummyOtrEngineHostImpl());
}
String[] outgoingMessage = session.transformSending(s, (List<TLV>) null);
for (String part : outgoingMessage) {
connection.send(recipient, part);
}
}
public void exit() throws OtrException {
this.processor.stop();
if (session != null)
session.endSession();
}
public void receive(String sender, String s) throws OtrException {
this.processor.enqueue(sender, s);
}
public void connect(Server server) {
this.processor = new MessageProcessor();
new Thread(this.processor).start();
this.connection = server.connect(this);
}
public void secureSession(String recipient) throws OtrException {
if (session == null) {
final SessionID sessionID = new SessionID(account, recipient, "DummyProtocol");
session = new SessionImpl(sessionID, new DummyOtrEngineHostImpl());
}
session.startSession();
}
public Connection getConnection() {
return connection;
}
public ProcessedMessage pollReceivedMessage() {
synchronized (processedMsgs) {
ProcessedMessage m;
int i = 0;
while ((m = processedMsgs.poll()) == null && i++ < 3) {
try {
processedMsgs.wait(1000);
} catch (InterruptedException e) {
}
}
return m;
}
}
class MessageProcessor implements Runnable {
private final Queue<Message> messageQueue = new LinkedList<Message>();
private boolean stopped;
private void process(Message m) throws OtrException {
if (session == null) {
final SessionID sessionID = new SessionID(account, m.getSender(), "DummyProtocol");
session = new SessionImpl(sessionID, new DummyOtrEngineHostImpl());
}
String receivedMessage = session.transformReceiving(m.getContent());
synchronized (processedMsgs) {
processedMsgs.add(new ProcessedMessage(m, receivedMessage));
processedMsgs.notify();
}
}
public void run() {
synchronized (messageQueue) {
while (!stopped) {
Message m = messageQueue.poll();
if (m == null) {
try {
messageQueue.wait();
} catch (InterruptedException e) {
stop();
}
} else {
try {
process(m);
} catch (OtrException e) {
e.printStackTrace();
stopped = true;
}
}
}
}
}
public void enqueue(String sender, String s) {
synchronized (messageQueue) {
messageQueue.add(new Message(sender, s));
messageQueue.notify();
}
}
public void stop() {
stopped = true;
synchronized (messageQueue) {
messageQueue.notify();
}
}
}
class DummyOtrEngineHostImpl implements OtrEngineHost {
public void injectMessage(SessionID sessionID, String msg) throws OtrException {
connection.send(sessionID.getUserID(), msg);
String msgDisplay = (msg.length() > 10) ? msg.substring(0, 10)
+ "..." : msg;
logger.finest("IM injects message: " + msgDisplay);
}
public void smpError(SessionID sessionID, int tlvType, boolean cheated)
throws OtrException {
logger.severe("SM verification error with user: " + sessionID);
}
public void smpAborted(SessionID sessionID) throws OtrException {
logger.severe("SM verification has been aborted by user: "
+ sessionID);
}
public void finishedSessionMessage(SessionID sessionID, String msgText) throws OtrException {
logger.severe("SM session was finished. You shouldn't send messages to: "
+ sessionID);
}
public void finishedSessionMessage(SessionID sessionID) throws OtrException {
logger.severe("SM session was finished. You shouldn't send messages to: "
+ sessionID);
}
public void requireEncryptedMessage(SessionID sessionID, String msgText)
throws OtrException {
logger.severe("Message can't be sent while encrypted session is not established: "
+ sessionID);
}
public void unreadableMessageReceived(SessionID sessionID)
throws OtrException {
logger.warning("Unreadable message received from: " + sessionID);
}
public void unencryptedMessageReceived(SessionID sessionID, String msg)
throws OtrException {
logger.warning("Unencrypted message received: " + msg + " from "
+ sessionID);
}
public void showError(SessionID sessionID, String error)
throws OtrException {
logger.severe("IM shows error to user: " + error);
}
public String getReplyForUnreadableMessage() {
return "You sent me an unreadable encrypted message.";
}
public void sessionStatusChanged(SessionID sessionID) {
// don't care.
}
public KeyPair getLocalKeyPair(SessionID paramSessionID) {
return new OtrCryptoEngineImpl().generateDSAKeyPair();
}
public OtrPolicy getSessionPolicy(SessionID ctx) {
return policy;
}
public void askForSecret(SessionID sessionID, String question) {
logger.finest("Ask for secret from: " + sessionID + ", question: "
+ question);
}
public void verify(SessionID sessionID, boolean approved) {
logger.finest("Session was verified: " + sessionID);
if (!approved)
logger.finest("Your answer for the question was verified."
+ "You should ask your opponent too or check shared secret.");
}
public void unverify(SessionID sessionID) {
logger.finest("Session was not verified: " + sessionID);
}
public byte[] getLocalFingerprintRaw(SessionID sessionID) {
try {
return new OtrCryptoEngineImpl()
.getFingerprintRaw(getLocalKeyPair(sessionID)
.getPublic());
} catch (OtrCryptoException e) {
e.printStackTrace();
}
return null;
}
public void askForSecret(SessionID sessionID, InstanceTag receiverTag, String question) {
}
public void verify(SessionID sessionID, String fingerprint, boolean approved) {
}
public void unverify(SessionID sessionID, String fingerprint) {
}
public String getReplyForUnreadableMessage(SessionID sessionID) {
return null;
}
public String getFallbackMessage(SessionID sessionID) {
return null;
}
public void messageFromAnotherInstanceReceived(SessionID sessionID) {
}
public void multipleInstancesDetected(SessionID sessionID) {
}
public String getFallbackMessage() {
return "Off-the-Record private conversation has been requested. However, you do not have a plugin to support that.";
}
public FragmenterInstructions getFragmenterInstructions(SessionID sessionID) {
return new FragmenterInstructions(FragmenterInstructions.UNLIMITED,
FragmenterInstructions.UNLIMITED);
}
}
}