public boolean enablePortForward() {
/*
* DynamicPortForwarder dpf = null;
*
* try { dpf = connection.createDynamicPortForwarder(new
* InetSocketAddress( InetAddress.getLocalHost(), 1984)); } catch
* (Exception e) { Log.e(TAG, "Could not create dynamic port forward",
* e); return false; }
*/
// LocalPortForwarder lpf1 = null;
try {
dnspf = connection.createLocalPortForwarder(8053, "www.google.com", 80);
if (profile.isSocks()) {
dpf = connection.createDynamicPortForwarder(profile.getLocalPort());
} else {
lpf =
connection.createLocalPortForwarder(
profile.getLocalPort(), profile.getRemoteAddress(), profile.getRemotePort());
}
} catch (Exception e) {
Log.e(TAG, "Could not create local port forward", e);
if (reason == null) reason = getString(R.string.fail_to_forward);
return false;
}
return true;
}
private void flushIptables() {
StringBuffer cmd = new StringBuffer();
cmd.append(BASE + "iptables -t nat -F SSHTUNNEL\n");
cmd.append(BASE + "iptables -t nat -X SSHTUNNEL\n");
cmd.append((CMD_IPTABLES_RETURN.replace("0.0.0.0", hostAddress)).replace("-A", "-D"));
if (enableDNSProxy) {
cmd.append(BASE + "iptables -t nat -F SSHTUNNELDNS\n");
cmd.append(BASE + "iptables -t nat -X SSHTUNNELDNS\n");
cmd.append(BASE + "iptables -t nat -D OUTPUT -p udp -j SSHTUNNELDNS\n");
}
if (profile.isGFWList()) {
String[] gfw_list = getResources().getStringArray(R.array.gfw_list);
for (String item : gfw_list) {
cmd.append(BASE + "iptables -t nat -D OUTPUT -p tcp -d " + item + " -j SSHTUNNEL\n");
}
} else if (profile.isAutoSetProxy()) {
cmd.append(BASE + "iptables -t nat -D OUTPUT -p tcp -j SSHTUNNEL\n");
} else {
// for proxy specified apps
if (apps == null || apps.length <= 0)
apps = AppManager.getProxyedApps(this, profile.getProxyedApps());
for (int i = 0; i < apps.length; i++) {
if (apps[i].isProxyed()) {
cmd.append(
BASE
+ "iptables "
+ "-t nat -m owner --uid-owner "
+ apps[i].getUid()
+ " -D OUTPUT -p tcp -j SSHTUNNEL\n");
}
}
}
String rules = cmd.toString();
runRootCommand(rules);
if (profile.isSocks()) runRootCommand(BASE + "proxy_socks.sh stop");
else runRootCommand(BASE + "proxy_http.sh stop");
}
// XXX: Is it right?
@Override
public String[] replyToChallenge(
String name, String instruction, int numPrompts, String[] prompt, boolean[] echo)
throws Exception {
String[] responses = new String[numPrompts];
for (int i = 0; i < numPrompts; i++) {
// request response from user for each prompt
if (prompt[i].toLowerCase().contains("password")) responses[i] = profile.getPassword();
}
return responses;
}
@Override
public boolean verifyServerHostKey(
String hostname, int port, String serverHostKeyAlgorithm, byte[] serverHostKey)
throws Exception {
String fingerPrint = KnownHosts.createHexFingerprint(serverHostKeyAlgorithm, serverHostKey);
int fingerPrintStatus = Constraints.FINGER_PRINT_CHANGED;
if (profile.getFingerPrintType() == null || profile.getFingerPrintType().equals("")) {
fingerPrintStatus = Constraints.FINGER_PRINT_INIITIALIZE;
reason = getString(R.string.finger_print_unknown);
} else {
if (profile.getFingerPrintType().equals(serverHostKeyAlgorithm)
&& profile.getFingerPrint() != null
&& profile.getFingerPrint().equals(fingerPrint)) {
return true;
} else {
fingerPrintStatus = Constraints.FINGER_PRINT_CHANGED;
reason = getString(R.string.finger_print_mismatch);
}
}
Log.d(TAG, "Finger Print: " + profile.getFingerPrint());
Log.d(TAG, "Finger Print Type: " + profile.getFingerPrintType());
Bundle bundle = new Bundle();
bundle.putInt(Constraints.ID, profile.getId());
bundle.putInt(Constraints.FINGER_PRINT_STATUS, fingerPrintStatus);
bundle.putString(Constraints.FINGER_PRINT, fingerPrint);
bundle.putString(Constraints.FINGER_PRINT_TYPE, serverHostKeyAlgorithm);
Message msg = new Message();
msg.setData(bundle);
hostKeyHandler.sendMessage(msg);
synchronized (fingerPrintLock) {
fingerPrintLock.wait();
}
return fingerPrintChecker;
}
// This is the old onStart method that will be called on the pre-2.0
// platform. On 2.0 or later we override onStartCommand() so this
// method will not be called.
@Override
public void onStart(Intent intent, int startId) {
super.onStart(intent, startId);
FlurryAgent.onStartSession(this, "MBY4JL18FQK1DPEJ5Y39");
Log.d(TAG, "Service Start");
Bundle bundle = intent.getExtras();
int id = bundle.getInt(Constraints.ID);
profile = ProfileFactory.loadProfileFromDao(id);
Log.d(TAG, profile.toString());
new Thread(
new Runnable() {
@Override
public void run() {
handler.sendEmptyMessage(MSG_CONNECT_START);
isConnecting = true;
enableDNSProxy = profile.isDNSProxy();
try {
URL url = new URL("http://gae-ip-country.appspot.com/");
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setConnectTimeout(2000);
conn.setReadTimeout(5000);
conn.connect();
InputStream is = conn.getInputStream();
BufferedReader input = new BufferedReader(new InputStreamReader(is));
String code = input.readLine();
if (code != null && code.length() > 0 && code.length() < 3) {
Log.d(TAG, "Location: " + code);
if (!code.contains("CN") && !code.contains("ZZ")) enableDNSProxy = false;
}
} catch (Exception e) {
Log.d(TAG, "Cannot get country code");
// Nothing
}
if (enableDNSProxy) {
if (dnsServer == null) {
// dnsServer = new DNSServer("DNS Server", "8.8.4.4",
// 53,
// SSHTunnelService.this);
dnsServer =
new DNSServer("DNS Server", "127.0.0.1", 8053, SSHTunnelService.this);
dnsServer.setBasePath("/data/data/org.sshtunnel");
dnsPort = dnsServer.init();
}
}
// Test for Redirect Support
initHasRedirectSupported();
if (isOnline() && connect()) {
// Connection and forward successful
finishConnection();
if (enableDNSProxy) {
// Start DNS Proxy
Thread dnsThread = new Thread(dnsServer);
dnsThread.setDaemon(true);
dnsThread.start();
}
notifyAlert(
getString(R.string.forward_success), getString(R.string.service_running));
handler.sendEmptyMessage(MSG_CONNECT_FINISH);
handler.sendEmptyMessage(MSG_CONNECT_SUCCESS);
// for widget, maybe exception here
try {
RemoteViews views =
new RemoteViews(getPackageName(), R.layout.sshtunnel_appwidget);
views.setImageViewResource(R.id.serviceToggle, R.drawable.on);
AppWidgetManager awm = AppWidgetManager.getInstance(SSHTunnelService.this);
awm.updateAppWidget(
awm.getAppWidgetIds(
new ComponentName(
SSHTunnelService.this, SSHTunnelWidgetProvider.class)),
views);
} catch (Exception ignore) {
// Nothing
}
} else {
// Connection or forward unsuccessful
notifyAlert(
getString(R.string.forward_fail) + ": " + reason,
getString(R.string.service_failed),
Notification.FLAG_AUTO_CANCEL);
handler.sendEmptyMessage(MSG_CONNECT_FINISH);
handler.sendEmptyMessage(MSG_CONNECT_FAIL);
try {
Thread.sleep(1000);
} catch (InterruptedException ignore) {
// Nothing
}
connected = false;
stopSelf();
}
isConnecting = false;
}
})
.start();
markServiceStarted();
}
/**
* Internal method to request actual PTY terminal once we've finished authentication. If called
* before authenticated, it will just fail.
*/
private void finishConnection() {
Log.e(TAG, "Forward Successful");
if (profile.isSocks()) runRootCommand(BASE + "proxy_socks.sh start " + profile.getLocalPort());
else runRootCommand(BASE + "proxy_http.sh start " + profile.getLocalPort());
StringBuffer cmd = new StringBuffer();
cmd.append(BASE + "iptables -t nat -N SSHTUNNEL\n");
cmd.append(BASE + "iptables -t nat -F SSHTUNNEL\n");
if (enableDNSProxy) {
cmd.append(BASE + "iptables -t nat -N SSHTUNNELDNS\n");
cmd.append(BASE + "iptables -t nat -F SSHTUNNELDNS\n");
if (hasRedirectSupport)
cmd.append(
BASE
+ "iptables "
+ "-t nat -A SSHTUNNELDNS -p udp --dport 53 -j REDIRECT --to "
+ dnsPort
+ "\n");
else
cmd.append(
BASE
+ "iptables "
+ "-t nat -A SSHTUNNELDNS -p udp --dport 53 -j DNAT --to-destination 127.0.0.1:"
+ dnsPort
+ "\n");
cmd.append(BASE + "iptables -t nat -A OUTPUT -p udp -j SSHTUNNELDNS\n");
}
if (profile.isSocks())
cmd.append(
hasRedirectSupport ? CMD_IPTABLES_REDIRECT_ADD_SOCKS : CMD_IPTABLES_DNAT_ADD_SOCKS);
else cmd.append(hasRedirectSupport ? CMD_IPTABLES_REDIRECT_ADD : CMD_IPTABLES_DNAT_ADD);
cmd.append(CMD_IPTABLES_RETURN.replace("0.0.0.0", hostAddress));
if (profile.isGFWList()) {
String[] gfw_list = getResources().getStringArray(R.array.gfw_list);
for (String item : gfw_list) {
cmd.append(BASE + "iptables -t nat -A OUTPUT -p tcp -d " + item + " -j SSHTUNNEL\n");
}
} else if (profile.isAutoSetProxy()) {
cmd.append(BASE + "iptables -t nat -A OUTPUT -p tcp -j SSHTUNNEL\n");
} else {
// for proxy specified apps
if (apps == null || apps.length <= 0)
apps = AppManager.getProxyedApps(this, profile.getProxyedApps());
for (int i = 0; i < apps.length; i++) {
if (apps[i].isProxyed()) {
cmd.append(
BASE
+ "iptables "
+ "-t nat -m owner --uid-owner "
+ apps[i].getUid()
+ " -A OUTPUT -p tcp -j SSHTUNNEL\n");
}
}
}
String rules = cmd.toString();
if (hostAddress != null)
rules =
rules
.replace("--dport 443", "! -d " + hostAddress + " --dport 443")
.replace("--dport 80", "! -d " + hostAddress + " --dport 80");
if (profile.isSocks()) runRootCommand(rules.replace("8124", "8123"));
else runRootCommand(rules);
}
@Override
public void connectionLost(Throwable reason) {
Log.d(TAG, "Connection Lost");
SimpleDateFormat df = new SimpleDateFormat("HH:mm:ss");
if (isConnecting || isStopping) {
return;
}
if (!isOnline()) {
stopReconnect(df);
return;
}
if (reason != null) {
if (reason.getMessage().contains("There was a problem during connect")) {
Log.e(TAG, "connection lost", reason);
return;
} else if (reason.getMessage().contains("Closed due to user request")) {
Log.e(TAG, "connection lost", reason);
return;
} else if (reason.getMessage().contains("The connect timeout expired")) {
stopReconnect(df);
return;
}
Log.e(TAG, "connection lost: " + reason.getMessage());
} else {
stopReconnect(df);
return;
}
if (profile.isAutoReconnect() && connected) {
for (int reconNum = 1; reconNum <= RECONNECT_TRIES; reconNum++) {
Log.d(TAG, "Reconnect tries: " + reconNum);
onDisconnect();
if (!connect()) {
try {
Thread.sleep(2000 * reconNum);
} catch (Exception ignore) {
// Nothing
}
continue;
}
notifyAlert(
getString(R.string.reconnect_success) + " " + df.format(new Date()),
getString(R.string.reconnect_success));
return;
}
}
stopReconnect(df);
}
public boolean connect() {
// try {
//
// connection.setCompression(true);
// connection.setTCPNoDelay(true);
//
// } catch (IOException e) {
// Log.e(TAG, "Could not enable compression!", e);
// }
// initialize the upstream proxy
if (profile.isUpstreamProxy()) {
try {
if (profile.getUpstreamProxy() == null || profile.getUpstreamProxy().equals(""))
throw new Exception();
String[] proxyInfo = profile.getUpstreamProxy().split("@");
if (proxyInfo.length == 1) {
String[] hostInfo = proxyInfo[0].split(":");
if (hostInfo.length != 2) throw new Exception();
proxyData = new HTTPProxyData(hostInfo[0], Integer.valueOf(hostInfo[1]));
} else if (proxyInfo.length == 2) {
String[] userInfo = proxyInfo[0].split(":");
if (userInfo.length != 2) throw new Exception();
String[] hostInfo = proxyInfo[1].split(":");
if (hostInfo.length != 2) throw new Exception();
proxyData =
new HTTPProxyData(
hostInfo[0], Integer.valueOf(hostInfo[1]), userInfo[0], userInfo[1]);
} else {
throw new Exception();
}
} catch (Exception e) {
if (reason == null) reason = getString(R.string.upstream_format_error);
return false;
}
}
// get the host ip address
if (proxyData != null) {
try {
hostAddress = InetAddress.getByName(proxyData.proxyHost).getHostAddress();
} catch (UnknownHostException e) {
hostAddress = null;
}
} else {
try {
hostAddress = InetAddress.getByName(profile.getHost()).getHostAddress();
} catch (UnknownHostException e) {
hostAddress = null;
}
}
// fail to connect if the dns lookup failed
if (hostAddress == null) {
if (reason == null) reason = getString(R.string.fail_to_connect);
return false;
}
// begin to connect
try {
connection = new Connection(profile.getHost(), profile.getPort());
if (proxyData != null) connection.setProxyData(proxyData);
connection.addConnectionMonitor(this);
/*
* Uncomment when debugging SSH protocol:
*/
/*
* DebugLogger logger = new DebugLogger() {
*
* public void log(int level, String className, String message) {
* Log.d("SSH", message); }
*
* };
*
* Logger.enabled = true; Logger.logger = logger;
*/
connection.connect(this, 10 * 1000, 20 * 1000);
connected = true;
} catch (Exception e) {
Log.e(TAG, "Problem in SSH connection thread during connecting", e);
// Display the reason in the text.
if (reason == null) reason = getString(R.string.fail_to_connect);
return false;
}
try {
// enter a loop to keep trying until authentication
int tries = 0;
while (connected && !connection.isAuthenticationComplete() && tries++ < AUTH_TRIES) {
authenticate();
// sleep to make sure we dont kill system
Thread.sleep(1000);
}
} catch (Exception e) {
Log.e(TAG, "Problem in SSH connection thread during authentication", e);
if (reason == null) reason = getString(R.string.fail_to_authenticate);
return false;
}
try {
if (connection.isAuthenticationComplete()) {
return enablePortForward();
}
} catch (Exception e) {
Log.e(TAG, "Problem in SSH connection thread during enabling port", e);
if (reason == null) reason = getString(R.string.fail_to_connect);
return false;
}
if (reason == null) reason = getString(R.string.fail_to_authenticate);
Log.e(TAG, "Cannot authenticate");
return false;
}
private void authenticate() {
try {
if (connection.authenticateWithNone(profile.getUser())) {
Log.d(TAG, "Authenticate with none");
return;
}
} catch (Exception e) {
Log.d(TAG, "Host does not support 'none' authentication.");
}
try {
if (connection.isAuthMethodAvailable(profile.getUser(), AUTH_PUBLICKEY)) {
File f = new File(profile.getKeyPath());
if (f.exists()) if (profile.getPassword().equals("")) profile.setPassword(null);
if (connection.authenticateWithPublicKey(profile.getUser(), f, profile.getPassword())) {
Log.d(TAG, "Authenticate with public key");
return;
}
}
} catch (Exception e) {
Log.d(TAG, "Host does not support 'Public key' authentication.");
}
try {
if (connection.isAuthMethodAvailable(profile.getUser(), AUTH_PASSWORD)) {
if (connection.authenticateWithPassword(profile.getUser(), profile.getPassword())) {
Log.d(TAG, "Authenticate with password");
return;
}
}
} catch (IllegalStateException e) {
Log.e(TAG, "Connection went away while we were trying to authenticate", e);
} catch (Exception e) {
Log.e(TAG, "Problem during handleAuthentication()", e);
}
// TODO: Need verification
try {
if (connection.isAuthMethodAvailable(profile.getUser(), AUTH_KEYBOARDINTERACTIVE)) {
if (connection.authenticateWithKeyboardInteractive(profile.getUser(), this)) return;
}
} catch (Exception e) {
Log.d(TAG, "Host does not support 'Keyboard-Interactive' authentication.");
}
}
