Hesham/wireguard-android
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VpnService: require root access

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Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
This commit is contained in:
Jason A. Donenfeld 2017-11-30 21:46:56 +01:00
parent 417e973c8f
commit 9e028ae8d6
3 changed files with 16 additions and 1 deletions
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6
app/src/main/java/com/wireguard/android/backends/RootShell.java
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@ -10,6 +10,8 @@ import java.io.InputStreamReader;
import java.io.OutputStream;
import java.nio.charset.StandardCharsets;
import java.util.List;
import java.util.regex.Pattern;
import java.util.regex.Matcher;
/**
* Helper class for running commands as root.
@ -22,6 +24,7 @@ class RootShell {
*/
private static final String SETUP_TEMPLATE = "export TMPDIR=%s\ntrap 'echo $?' EXIT\n";
private static final String TAG = "RootShell";
private static final Pattern ERRNO_EXTRACTOR = Pattern.compile("error=(\\d+)");
private final byte[] setupCommands;
private final String shell;
@ -80,6 +83,9 @@ class RootShell {
Log.d(TAG, "Session completed with exit value " + exitValue);
} catch (IOException | InterruptedException | NumberFormatException e) {
Log.w(TAG, "Session failed with exception", e);
final Matcher match = ERRNO_EXTRACTOR.matcher(e.toString());
if (match.find())
exitValue = Integer.valueOf(match.group(1));
}
return exitValue;
}

10
app/src/main/java/com/wireguard/android/backends/VpnService.java
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@ -283,9 +283,14 @@ public class VpnService extends Service
return -0xfff0001;
if (!existsInPath("wg") || !existsInPath("wg-quick"))
return -0xfff0002;
if (!existsInPath("su"))
return -0xfff0003;
Log.i(TAG, "Running wg-quick up for " + config.getName());
final File configFile = new File(getFilesDir(), config.getName() + ".conf");
return rootShell.run(null, "wg-quick up '" + configFile.getPath() + "'");
final int ret = rootShell.run(null, "wg-quick up '" + configFile.getPath() + "'");
if (ret == 13 /* EPERM */)
return -0xfff0003;
return ret;
}
private boolean existsInPath(final String file) {
@ -304,6 +309,9 @@ public class VpnService extends Service
} else if (ret == -0xfff0002) {
Toast.makeText(getApplicationContext(), getString(R.string.error_missing),
Toast.LENGTH_LONG).show();
} else if (ret == -0xfff0003) {
Toast.makeText(getApplicationContext(), getString(R.string.error_su),
Toast.LENGTH_LONG).show();
} else {
Toast.makeText(getApplicationContext(), getString(R.string.error_up),
Toast.LENGTH_SHORT).show();

1
app/src/main/res/values/strings.xml
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@ -19,6 +19,7 @@
<string name="endpoint">Endpoint</string>
<string name="error_down">Error bringing down WireGuard tunnel</string>
<string name="error_missing">Missing wg(8) and/or wg-quick(8) in PATH</string>
<string name="error_su">WireGuard currently requires root access</string>
<string name="error_up">Error bringing up WireGuard tunnel</string>
<string name="generate">Generate</string>
<string name="hint_automatic">(auto)</string>