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/**
* Copyright (c) 2013, 2014, 2015 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.content.*;
import android.util.Log;
import com.google.gson.*;
import com.google.gson.reflect.*;
import org.json.*;
import java.lang.reflect.*;
import java.util.*;
import de.blinkt.openvpn.*;
import de.blinkt.openvpn.core.*;
import se.leap.bitmaskclient.*;
/**
* @author parmegv
*/
public class GatewaysManager {
private Context context;
private SharedPreferences preferences;
private List<Gateway> gateways = new ArrayList<>();
private ProfileManager profile_manager;
private Type list_type = new TypeToken<ArrayList<Gateway>>() {}.getType();
public GatewaysManager() {}
public GatewaysManager(Context context, SharedPreferences preferences) {
this.context = context;
this.preferences = preferences;
profile_manager = ProfileManager.getInstance(context);
}
public Gateway select() {
GatewaySelector gateway_selector = new GatewaySelector(gateways);
return gateway_selector.select();
}
public boolean isEmpty() {
return gateways.isEmpty();
}
public int size() {
return gateways.size();
}
public void addFromString(String gateways) {
List<Gateway> gateways_list = new ArrayList<Gateway>();
try {
gateways_list = new Gson().fromJson(gateways, list_type);
} catch(JsonSyntaxException e) {
gateways_list.add(new Gson().fromJson(gateways, Gateway.class));
}
if(gateways_list != null) {
for (Gateway gateway : gateways_list)
addGateway(gateway);
this.gateways.addAll(gateways_list);
} else
Log.d("GatewaysManager", "No gateways added");
}
@Override
public String toString() {
return new Gson().toJson(gateways, list_type);
}
public void fromEipServiceJson(JSONObject eip_definition) {
try {
JSONArray gatewaysDefined = eip_definition.getJSONArray("gateways");
for (int i = 0; i < gatewaysDefined.length(); i++) {
JSONObject gw = gatewaysDefined.getJSONObject(i);
if (isOpenVpnGateway(gw)) {
JSONObject secrets = secretsConfiguration();
Gateway aux = new Gateway(eip_definition, secrets, gw);
if(!containsProfileWithSecrets(aux.getProfile())) {
addGateway(aux);
}
}
}
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
private boolean isOpenVpnGateway(JSONObject gateway) {
try {
String transport = gateway.getJSONObject("capabilities").getJSONArray("transport").toString();
return transport.contains("openvpn");
} catch (JSONException e) {
return false;
}
}
private JSONObject secretsConfiguration() {
JSONObject result = new JSONObject();
try {
result.put(Provider.CA_CERT, preferences.getString(Provider.CA_CERT, ""));
result.put(Constants.PRIVATE_KEY, preferences.getString(Constants.PRIVATE_KEY, ""));
result.put(Constants.CERTIFICATE, preferences.getString(Constants.CERTIFICATE, ""));
} catch (JSONException e) {
e.printStackTrace();
}
return result;
}
private boolean containsProfileWithSecrets(VpnProfile profile) {
boolean result = false;
Collection<VpnProfile> profiles = profile_manager.getProfiles();
for(VpnProfile aux : profiles) {
result = result || sameConnections(profile.mConnections, aux.mConnections)
&& profile.mClientCertFilename.equalsIgnoreCase(aux.mClientCertFilename)
&& profile.mClientKeyFilename.equalsIgnoreCase(aux.mClientKeyFilename);
}
return result;
}
private void addGateway(Gateway gateway) {
removeDuplicatedGateway(gateway);
gateways.add(gateway);
VpnProfile profile = gateway.getProfile();
profile_manager.addProfile(profile);
//profile_manager.saveProfile(context, profile);
//profile_manager.saveProfileList(context);
}
private void removeDuplicatedGateway(Gateway gateway) {
Iterator<Gateway> it = gateways.iterator();
List<Gateway> gateways_to_remove = new ArrayList<>();
while(it.hasNext()) {
Gateway aux = it.next();
if(sameConnections(aux.getProfile().mConnections, gateway.getProfile().mConnections)) {
gateways_to_remove.add(aux);
}
}
gateways.removeAll(gateways_to_remove);
removeDuplicatedProfiles(gateway.getProfile());
}
private void removeDuplicatedProfiles(VpnProfile original) {
Collection<VpnProfile> profiles = profile_manager.getProfiles();
List<VpnProfile> remove_list = new ArrayList<>();
for(VpnProfile aux : profiles) {
if (sameConnections(original.mConnections, aux.mConnections))
remove_list.add(aux);
}
for (VpnProfile profile : remove_list)
profile_manager.removeProfile(context, profile);
}
private boolean sameConnections(Connection[] c1, Connection[] c2) {
int same_connections = 0;
for(Connection c1_aux : c1) {
for(Connection c2_aux : c2)
if(c2_aux.mServerName.equals(c1_aux.mServerName)) {
same_connections++;
break;
}
}
return c1.length == c2.length && c1.length == same_connections;
}
}
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