/**
* 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.smackx.bytestreams.socks5;
import static org.junit.Assert.*;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.net.ServerSocket;
import java.net.Socket;
import org.jivesoftware.smack.XMPPException;
import org.jivesoftware.smackx.bytestreams.socks5.Socks5Client;
import org.jivesoftware.smackx.bytestreams.socks5.Socks5Utils;
import org.jivesoftware.smackx.bytestreams.socks5.packet.Bytestream.StreamHost;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
/**
* Test for Socks5Client class.
*
* @author Henning Staib
*/
public class Socks5ClientTest {
// settings
private String serverAddress = "127.0.0.1";
private int serverPort = 7890;
private String proxyJID = "proxy.xmpp-server";
private String digest = "digest";
private ServerSocket serverSocket;
/**
* Initialize fields used in the tests.
*
* @throws Exception should not happen
*/
@Before
public void setup() throws Exception {
// create SOCKS5 proxy server socket
serverSocket = new ServerSocket(serverPort);
}
/**
* A SOCKS5 client MUST close connection if server doesn't accept any of the given
* authentication methods. (See RFC1928 Section 3)
*
* @throws Exception should not happen
*/
@Test
public void shouldCloseSocketIfServerDoesNotAcceptAuthenticationMethod() throws Exception {
// start thread to connect to SOCKS5 proxy
Thread serverThread = new Thread() {
@Override
public void run() {
StreamHost streamHost = new StreamHost(proxyJID, serverAddress);
streamHost.setPort(serverPort);
Socks5Client socks5Client = new Socks5Client(streamHost, digest);
try {
socks5Client.getSocket(10000);
fail("exception should be thrown");
}
catch (XMPPException e) {
assertTrue(e.getMessage().contains(
"establishing connection to SOCKS5 proxy failed"));
}
catch (Exception e) {
fail(e.getMessage());
}
}
};
serverThread.start();
// accept connection form client
Socket socket = serverSocket.accept();
DataInputStream in = new DataInputStream(socket.getInputStream());
DataOutputStream out = new DataOutputStream(socket.getOutputStream());
// validate authentication request
assertEquals((byte) 0x05, (byte) in.read()); // version
assertEquals((byte) 0x01, (byte) in.read()); // number of supported auth methods
assertEquals((byte) 0x00, (byte) in.read()); // no-authentication method
// respond that no authentication method is accepted
out.write(new byte[] { (byte) 0x05, (byte) 0xFF });
out.flush();
// wait for client to shutdown
serverThread.join();
// assert socket is closed
assertEquals(-1, in.read());
}
/**
* The SOCKS5 client should close connection if server replies in an unsupported way.
*
* @throws Exception should not happen
*/
@Test
public void shouldCloseSocketIfServerRepliesInUnsupportedWay() throws Exception {
// start thread to connect to SOCKS5 proxy
Thread serverThread = new Thread() {
@Override
public void run() {
StreamHost streamHost = new StreamHost(proxyJID, serverAddress);
streamHost.setPort(serverPort);
Socks5Client socks5Client = new Socks5Client(streamHost, digest);
try {
socks5Client.getSocket(10000);
fail("exception should be thrown");
}
catch (XMPPException e) {
assertTrue(e.getMessage().contains(
"establishing connection to SOCKS5 proxy failed"));
}
catch (Exception e) {
fail(e.getMessage());
}
}
};
serverThread.start();
// accept connection from client
Socket socket = serverSocket.accept();
DataInputStream in = new DataInputStream(socket.getInputStream());
DataOutputStream out = new DataOutputStream(socket.getOutputStream());
// validate authentication request
assertEquals((byte) 0x05, (byte) in.read()); // version
assertEquals((byte) 0x01, (byte) in.read()); // number of supported auth methods
assertEquals((byte) 0x00, (byte) in.read()); // no-authentication method
// respond that no no-authentication method is used
out.write(new byte[] { (byte) 0x05, (byte) 0x00 });
out.flush();
Socks5Utils.receiveSocks5Message(in);
// reply with unsupported address type
out.write(new byte[] { (byte) 0x05, (byte) 0x00, (byte) 0x00, (byte) 0x01, (byte) 0x00 });
out.flush();
// wait for client to shutdown
serverThread.join();
// assert socket is closed
assertEquals(-1, in.read());
}
/**
* The SOCKS5 client should close connection if server replies with an error.
*
* @throws Exception should not happen
*/
@Test
public void shouldCloseSocketIfServerRepliesWithError() throws Exception {
// start thread to connect to SOCKS5 proxy
Thread serverThread = new Thread() {
@Override
public void run() {
StreamHost streamHost = new StreamHost(proxyJID, serverAddress);
streamHost.setPort(serverPort);
Socks5Client socks5Client = new Socks5Client(streamHost, digest);
try {
socks5Client.getSocket(10000);
fail("exception should be thrown");
}
catch (XMPPException e) {
assertTrue(e.getMessage().contains(
"establishing connection to SOCKS5 proxy failed"));
}
catch (Exception e) {
fail(e.getMessage());
}
}
};
serverThread.start();
Socket socket = serverSocket.accept();
DataInputStream in = new DataInputStream(socket.getInputStream());
DataOutputStream out = new DataOutputStream(socket.getOutputStream());
// validate authentication request
assertEquals((byte) 0x05, (byte) in.read()); // version
assertEquals((byte) 0x01, (byte) in.read()); // number of supported auth methods
assertEquals((byte) 0x00, (byte) in.read()); // no-authentication method
// respond that no no-authentication method is used
out.write(new byte[] { (byte) 0x05, (byte) 0x00 });
out.flush();
Socks5Utils.receiveSocks5Message(in);
// reply with full SOCKS5 message with an error code (01 = general SOCKS server
// failure)
out.write(new byte[] { (byte) 0x05, (byte) 0x01, (byte) 0x00, (byte) 0x03 });
byte[] address = digest.getBytes();
out.write(address.length);
out.write(address);
out.write(new byte[] { (byte) 0x00, (byte) 0x00 });
out.flush();
// wait for client to shutdown
serverThread.join();
// assert socket is closed
assertEquals(-1, in.read());
}
/**
* The SOCKS5 client should successfully connect to the SOCKS5 server
*
* @throws Exception should not happen
*/
@Test
public void shouldSuccessfullyConnectToSocks5Server() throws Exception {
// start thread to connect to SOCKS5 proxy
Thread serverThread = new Thread() {
@Override
public void run() {
StreamHost streamHost = new StreamHost(proxyJID, serverAddress);
streamHost.setPort(serverPort);
Socks5Client socks5Client = new Socks5Client(streamHost, digest);
try {
Socket socket = socks5Client.getSocket(10000);
assertNotNull(socket);
socket.getOutputStream().write(123);
socket.close();
}
catch (Exception e) {
fail(e.getMessage());
}
}
};
serverThread.start();
Socket socket = serverSocket.accept();
DataInputStream in = new DataInputStream(socket.getInputStream());
DataOutputStream out = new DataOutputStream(socket.getOutputStream());
// validate authentication request
assertEquals((byte) 0x05, (byte) in.read()); // version
assertEquals((byte) 0x01, (byte) in.read()); // number of supported auth methods
assertEquals((byte) 0x00, (byte) in.read()); // no-authentication method
// respond that no no-authentication method is used
out.write(new byte[] { (byte) 0x05, (byte) 0x00 });
out.flush();
byte[] address = digest.getBytes();
assertEquals((byte) 0x05, (byte) in.read()); // version
assertEquals((byte) 0x01, (byte) in.read()); // connect request
assertEquals((byte) 0x00, (byte) in.read()); // reserved byte (always 0)
assertEquals((byte) 0x03, (byte) in.read()); // address type (domain)
assertEquals(address.length, (byte) in.read()); // address length
for (int i = 0; i < address.length; i++) {
assertEquals(address[i], (byte) in.read()); // address
}
assertEquals((byte) 0x00, (byte) in.read()); // port
assertEquals((byte) 0x00, (byte) in.read());
// reply with success SOCKS5 message
out.write(new byte[] { (byte) 0x05, (byte) 0x00, (byte) 0x00, (byte) 0x03 });
out.write(address.length);
out.write(address);
out.write(new byte[] { (byte) 0x00, (byte) 0x00 });
out.flush();
// wait for client to shutdown
serverThread.join();
// verify data sent from client
assertEquals(123, in.read());
// assert socket is closed
assertEquals(-1, in.read());
}
/**
* Close fake SOCKS5 proxy.
*
* @throws Exception should not happen
*/
@After
public void cleanup() throws Exception {
serverSocket.close();
}
}