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/*
* Copyright (c) 2012-2016 Arne Schwabe
* Distributed under the GNU GPL v2 with additional terms. For full terms see the file doc/LICENSE.txt
*/
package de.blinkt.openvpn.core;
import android.annotation.TargetApi;
import android.content.Context;
import android.os.Build;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Arrays;
import java.util.Vector;
import se.leap.bitmaskclient.R;
public class VPNLaunchHelper {
private static final String MININONPIEVPN = "nopie_openvpn";
private static final String MINIPIEVPN = "pie_openvpn";
private static final String OVPNCONFIGFILE = "android.conf";
private static String writeMiniVPN(Context context) {
String nativeAPI = NativeUtils.getNativeAPI();
/* Q does not allow executing binaries written in temp directory anymore */
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.P)
return new File(context.getApplicationInfo().nativeLibraryDir, "libovpnexec.so").getPath();
String[] abis;
abis = getSupportedABIsLollipop();
if (!nativeAPI.equals(abis[0])) {
VpnStatus.logWarning(R.string.abi_mismatch, Arrays.toString(abis), nativeAPI);
abis = new String[]{nativeAPI};
}
for (String abi : abis) {
File vpnExecutable = new File(context.getCacheDir(), "c_" + getMiniVPNExecutableName() + "." + abi);
if ((vpnExecutable.exists() && vpnExecutable.canExecute()) || writeMiniVPNBinary(context, abi, vpnExecutable)) {
return vpnExecutable.getPath();
}
}
throw new RuntimeException("Cannot find any execute for this device's ABIs " + abis.toString());
}
private static String[] getSupportedABIsLollipop() {
return Build.SUPPORTED_ABIS;
}
private static String getMiniVPNExecutableName() {
return MINIPIEVPN;
}
public static String[] replacePieWithNoPie(String[] mArgv) {
mArgv[0] = mArgv[0].replace(MINIPIEVPN, MININONPIEVPN);
return mArgv;
}
static String[] buildOpenvpnArgv(Context c) {
Vector<String> args = new Vector<>();
String binaryName = writeMiniVPN(c);
// Add fixed paramenters
//args.add("/data/data/de.blinkt.openvpn/lib/openvpn");
if (binaryName == null) {
VpnStatus.logError("Error writing minivpn binary");
return null;
}
args.add(binaryName);
args.add("--config");
args.add(getConfigFilePath(c));
return args.toArray(new String[args.size()]);
}
private static boolean writeMiniVPNBinary(Context context, String abi, File mvpnout) {
try {
InputStream mvpn;
try {
mvpn = context.getAssets().open(getMiniVPNExecutableName() + "." + abi);
} catch (IOException errabi) {
VpnStatus.logInfo("Failed getting assets for archicture " + abi);
return false;
}
FileOutputStream fout = new FileOutputStream(mvpnout);
byte buf[] = new byte[4096];
int lenread = mvpn.read(buf);
while (lenread > 0) {
fout.write(buf, 0, lenread);
lenread = mvpn.read(buf);
}
fout.close();
if (!mvpnout.setExecutable(true)) {
VpnStatus.logError("Failed to make OpenVPN executable");
return false;
}
return true;
} catch (IOException e) {
VpnStatus.logException(e);
return false;
}
}
public static String getConfigFilePath(Context context) {
return context.getCacheDir().getAbsolutePath() + "/" + OVPNCONFIGFILE;
}
}
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