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/**
* Copyright (c) 2013 LEAP Encryption Access Project and contributers
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package se.leap.bitmaskclient.eip;
import android.app.*;
import android.content.*;
import android.os.*;
import android.util.Log;
import org.json.*;
import de.blinkt.openvpn.*;
import se.leap.bitmaskclient.*;
import static se.leap.bitmaskclient.eip.Constants.*;
/**
* EIP is the abstract base class for interacting with and managing the Encrypted
* Internet Proxy connection. Connections are started, stopped, and queried through
* this IntentService.
* Contains logic for parsing eip-service.json from the provider, configuring and selecting
* gateways, and controlling {@link de.blinkt.openvpn.core.OpenVPNService} connections.
*
* @author Sean Leonard <meanderingcode@aetherislands.net>
* @author Parménides GV <parmegv@sdf.org>
*/
public final class EIP extends IntentService {
public final static String TAG = EIP.class.getSimpleName();
public final static String SERVICE_API_PATH = "config/eip-service.json";
public static final int DISCONNECT = 15;
private static Context context;
private static ResultReceiver mReceiver;
private static SharedPreferences preferences;
private static JSONObject eip_definition;
private static GatewaysManager gateways_manager = new GatewaysManager();
private static Gateway gateway;
public EIP(){
super(TAG);
}
@Override
public void onCreate() {
super.onCreate();
context = getApplicationContext();
preferences = getSharedPreferences(Dashboard.SHARED_PREFERENCES, MODE_PRIVATE);
eip_definition = eipDefinitionFromPreferences();
if(gateways_manager.isEmpty())
gatewaysFromPreferences();
}
@Override
protected void onHandleIntent(Intent intent) {
String action = intent.getAction();
mReceiver = intent.getParcelableExtra(RECEIVER_TAG);
if ( action.equals(ACTION_START_EIP))
startEIP();
else if (action.equals(ACTION_STOP_EIP))
stopEIP();
else if (action.equals(ACTION_IS_EIP_RUNNING))
isRunning();
else if (action.equals(ACTION_UPDATE_EIP_SERVICE))
updateEIPService();
else if (action.equals(ACTION_CHECK_CERT_VALIDITY))
checkCertValidity();
}
/**
* Initiates an EIP connection by selecting a gateway and preparing and sending an
* Intent to {@link de.blinkt.openvpn.LaunchVPN}.
* It also sets up early routes.
*/
private void startEIP() {
if(gateways_manager.isEmpty())
updateEIPService();
earlyRoutes();
gateway = gateways_manager.select();
if(gateway != null && gateway.getProfile() != null) {
mReceiver = EipFragment.getReceiver();
launchActiveGateway();
tellToReceiver(ACTION_START_EIP, Activity.RESULT_OK);
} else
tellToReceiver(ACTION_START_EIP, Activity.RESULT_CANCELED);
}
/**
* Early routes are routes that block traffic until a new
* VpnService is started properly.
*/
private void earlyRoutes() {
Intent void_vpn_launcher = new Intent(context, VoidVpnLauncher.class);
void_vpn_launcher.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(void_vpn_launcher);
}
private void launchActiveGateway() {
Intent intent = new Intent(this,LaunchVPN.class);
intent.setAction(Intent.ACTION_MAIN);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
intent.putExtra(LaunchVPN.EXTRA_NAME, gateway.getProfile().getName());
intent.putExtra(LaunchVPN.EXTRA_HIDELOG, true);
startActivity(intent);
}
private void stopEIP() {
EipStatus eip_status = EipStatus.getInstance();
int result_code = Activity.RESULT_CANCELED;
if(eip_status.isConnected() || eip_status.isConnecting())
result_code = Activity.RESULT_OK;
tellToReceiver(ACTION_STOP_EIP, result_code);
}
/**
* Checks the last stored status notified by ics-openvpn
* Sends <code>Activity.RESULT_CANCELED</code> to the ResultReceiver that made the
* request if it's not connected, <code>Activity.RESULT_OK</code> otherwise.
*/
private void isRunning() {
EipStatus eip_status = EipStatus.getInstance();
int resultCode = (eip_status.isConnected()) ?
Activity.RESULT_OK :
Activity.RESULT_CANCELED;
tellToReceiver(ACTION_IS_EIP_RUNNING, resultCode);
}
/**
* Loads eip-service.json from SharedPreferences, delete previous vpn profiles and add new gateways.
* TODO Implement API call to refresh eip-service.json from the provider
*/
private void updateEIPService() {
eip_definition = eipDefinitionFromPreferences();
if(eip_definition.length() > 0)
updateGateways();
tellToReceiver(ACTION_UPDATE_EIP_SERVICE, Activity.RESULT_OK);
}
private JSONObject eipDefinitionFromPreferences() {
JSONObject result = new JSONObject();
try {
String eip_definition_string = preferences.getString(KEY, "");
if(!eip_definition_string.isEmpty()) {
result = new JSONObject(eip_definition_string);
}
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return result;
}
private void updateGateways(){
gateways_manager.fromEipServiceJson(eip_definition);
gatewaysToPreferences();
}
private void gatewaysFromPreferences() {
String gateways_string = preferences.getString(Gateway.TAG, "");
gateways_manager = new GatewaysManager(context, preferences);
gateways_manager.addFromString(gateways_string);
preferences.edit().remove(Gateway.TAG).apply();
}
private void gatewaysToPreferences() {
String gateways_string = gateways_manager.toString();
preferences.edit().putString(Gateway.TAG, gateways_string).commit();
}
private void checkCertValidity() {
VpnCertificateValidator validator = new VpnCertificateValidator(preferences.getString(CERTIFICATE, ""));
int resultCode = validator.isValid() ?
Activity.RESULT_OK :
Activity.RESULT_CANCELED;
tellToReceiver(ACTION_CHECK_CERT_VALIDITY, resultCode);
}
private void tellToReceiver(String action, int resultCode) {
if (mReceiver != null){
Bundle resultData = new Bundle();
resultData.putString(REQUEST_TAG, action);
mReceiver.send(resultCode, resultData);
}
}
}
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