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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 org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.util.Iterator;
import se.leap.bitmaskclient.Provider;
import static se.leap.bitmaskclient.Constants.PROVIDER_PRIVATE_KEY;
import static se.leap.bitmaskclient.Constants.PROVIDER_VPN_CERTIFICATE;
public class VpnConfigGenerator {
private JSONObject general_configuration;
private JSONObject gateway;
private JSONObject secrets;
public final static String TAG = VpnConfigGenerator.class.getSimpleName();
private final String newLine = System.getProperty("line.separator"); // Platform new line
public VpnConfigGenerator(JSONObject general_configuration, JSONObject secrets, JSONObject gateway) {
this.general_configuration = general_configuration;
this.gateway = gateway;
this.secrets = secrets;
}
public String generate() {
return
generalConfiguration()
+ newLine
+ gatewayConfiguration()
+ newLine
+ secretsConfiguration()
+ newLine
+ androidCustomizations();
}
private String generalConfiguration() {
String commonOptions = "";
try {
Iterator keys = general_configuration.keys();
while (keys.hasNext()) {
String key = keys.next().toString();
commonOptions += key + " ";
for (String word : String.valueOf(general_configuration.get(key)).split(" "))
commonOptions += word + " ";
commonOptions += newLine;
}
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
commonOptions += "client";
return commonOptions;
}
private String gatewayConfiguration() {
String remotes = "";
String ipAddressKeyword = "ip_address";
String remoteKeyword = "remote";
String portsKeyword = "ports";
String protocolKeyword = "protocols";
String capabilitiesKeyword = "capabilities";
try {
String ip_address = gateway.getString(ipAddressKeyword);
JSONObject capabilities = gateway.getJSONObject(capabilitiesKeyword);
JSONArray ports = capabilities.getJSONArray(portsKeyword);
for (int i = 0; i < ports.length(); i++) {
String port_specific_remotes = "";
int port = ports.getInt(i);
JSONArray protocols = capabilities.getJSONArray(protocolKeyword);
for (int j = 0; j < protocols.length(); j++) {
String protocol = protocols.optString(j);
String new_remote = remoteKeyword + " " + ip_address + " " + port + " " + protocol + newLine;
port_specific_remotes += new_remote;
}
remotes += port_specific_remotes;
}
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
if (remotes.endsWith(newLine)) {
remotes = remotes.substring(0, remotes.lastIndexOf(newLine));
}
return remotes;
}
private String secretsConfiguration() {
try {
String ca =
"<ca>"
+ newLine
+ secrets.getString(Provider.CA_CERT)
+ newLine
+ "</ca>";
String key =
"<key>"
+ newLine
+ secrets.getString(PROVIDER_PRIVATE_KEY)
+ newLine
+ "</key>";
String openvpnCert =
"<cert>"
+ newLine
+ secrets.getString(PROVIDER_VPN_CERTIFICATE)
+ newLine
+ "</cert>";
return ca + newLine + key + newLine + openvpnCert;
} catch (JSONException e) {
e.printStackTrace();
return "";
}
}
private String androidCustomizations() {
return
"remote-cert-tls server"
+ newLine
+ "persist-tun"
+ newLine
+ "auth-retry nointeract";
}
}
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