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-rw-r--r--app/src/main/java/de/blinkt/openvpn/core/OpenVPNService.java6
-rw-r--r--app/src/main/java/se/leap/bitmaskclient/Constants.java1
-rw-r--r--app/src/main/java/se/leap/bitmaskclient/Provider.java2
-rw-r--r--app/src/main/java/se/leap/bitmaskclient/utils/Cmd.java93
-rw-r--r--app/src/main/java/se/leap/bitmaskclient/utils/FirewallHelper.java196
-rw-r--r--app/src/main/java/se/leap/bitmaskclient/utils/PreferenceHelper.java65
6 files changed, 331 insertions, 32 deletions
diff --git a/app/src/main/java/de/blinkt/openvpn/core/OpenVPNService.java b/app/src/main/java/de/blinkt/openvpn/core/OpenVPNService.java
index 0863cc8e..766dc925 100644
--- a/app/src/main/java/de/blinkt/openvpn/core/OpenVPNService.java
+++ b/app/src/main/java/de/blinkt/openvpn/core/OpenVPNService.java
@@ -47,6 +47,7 @@ import de.blinkt.openvpn.core.connection.Obfs4Connection;
import se.leap.bitmaskclient.R;
import se.leap.bitmaskclient.VpnNotificationManager;
import se.leap.bitmaskclient.pluggableTransports.Shapeshifter;
+import se.leap.bitmaskclient.utils.FirewallHelper;
import static de.blinkt.openvpn.core.ConnectionStatus.LEVEL_CONNECTED;
import static de.blinkt.openvpn.core.ConnectionStatus.LEVEL_WAITING_FOR_USER_INPUT;
@@ -89,6 +90,7 @@ public class OpenVPNService extends VpnService implements StateListener, Callbac
private Runnable mOpenVPNThread;
private VpnNotificationManager notificationManager;
private Shapeshifter shapeshifter;
+ private FirewallHelper firewallHelper;
private static final int PRIORITY_MIN = -2;
private static final int PRIORITY_DEFAULT = 0;
@@ -192,6 +194,7 @@ public class OpenVPNService extends VpnService implements StateListener, Callbac
VpnStatus.removeStateListener(this);
}
}
+ firewallHelper.shutdownFirewall();
}
private boolean runningOnAndroidTV() {
@@ -446,6 +449,8 @@ public class OpenVPNService extends VpnService implements StateListener, Callbac
mProcessThread.start();
}
+ firewallHelper.startFirewall();
+
new Handler(getMainLooper()).post(() -> {
if (mDeviceStateReceiver != null) {
unregisterDeviceStateReceiver();
@@ -513,6 +518,7 @@ public class OpenVPNService extends VpnService implements StateListener, Callbac
super.onCreate();
notificationManager = new VpnNotificationManager(this, this);
notificationManager.createOpenVpnNotificationChannel();
+ firewallHelper = new FirewallHelper(this);
}
@Override
diff --git a/app/src/main/java/se/leap/bitmaskclient/Constants.java b/app/src/main/java/se/leap/bitmaskclient/Constants.java
index d3c09f08..0cbf82e1 100644
--- a/app/src/main/java/se/leap/bitmaskclient/Constants.java
+++ b/app/src/main/java/se/leap/bitmaskclient/Constants.java
@@ -15,6 +15,7 @@ public interface Constants {
String LAST_USED_PROFILE = "last_used_profile";
String EXCLUDED_APPS = "excluded_apps";
String USE_PLUGGABLE_TRANSPORTS = "usePluggableTransports";
+ String SU_PERMISSION = "su_permission";
//////////////////////////////////////////////
diff --git a/app/src/main/java/se/leap/bitmaskclient/Provider.java b/app/src/main/java/se/leap/bitmaskclient/Provider.java
index 507a11bf..b98c3fd3 100644
--- a/app/src/main/java/se/leap/bitmaskclient/Provider.java
+++ b/app/src/main/java/se/leap/bitmaskclient/Provider.java
@@ -141,7 +141,7 @@ public final class Provider implements Parcelable {
}
}
} catch (Exception e) {
- e.printStackTrace();
+ // ignore
}
return false;
}
diff --git a/app/src/main/java/se/leap/bitmaskclient/utils/Cmd.java b/app/src/main/java/se/leap/bitmaskclient/utils/Cmd.java
new file mode 100644
index 00000000..a72658a4
--- /dev/null
+++ b/app/src/main/java/se/leap/bitmaskclient/utils/Cmd.java
@@ -0,0 +1,93 @@
+/**
+ * Copyright (c) 2019 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.utils;
+
+import android.support.annotation.WorkerThread;
+import android.util.Log;
+
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.io.OutputStreamWriter;
+
+public class Cmd {
+
+ private static final String TAG = Cmd.class.getSimpleName();
+
+ @WorkerThread
+ public static int runBlockingCmd(String[] cmds, StringBuilder log) throws Exception {
+ return runCmd(cmds, log, true);
+ }
+
+ @WorkerThread
+ private static int runCmd(String[] cmds, StringBuilder log,
+ boolean waitFor) throws Exception {
+
+ int exitCode = -1;
+ Process proc = Runtime.getRuntime().exec("sh");
+ OutputStreamWriter out = new OutputStreamWriter(proc.getOutputStream());
+
+ try {
+ for (String cmd : cmds) {
+ Log.d(TAG, "executing CMD: " + cmd);
+ out.write(cmd);
+ out.write("\n");
+ }
+
+ out.flush();
+ out.write("exit\n");
+ out.flush();
+ } catch (IOException e) {
+ e.printStackTrace();
+ } finally {
+ out.close();
+ }
+
+ if (waitFor) {
+ // Consume the "stdout"
+ InputStreamReader reader = new InputStreamReader(proc.getInputStream());
+ readToLogString(reader, log);
+
+ // Consume the "stderr"
+ reader = new InputStreamReader(proc.getErrorStream());
+ readToLogString(reader, log);
+
+ try {
+ exitCode = proc.waitFor();
+ } catch (InterruptedException e) {
+ e.printStackTrace();
+ }
+ }
+
+ return exitCode;
+ }
+
+ private static void readToLogString(InputStreamReader reader, StringBuilder log) throws IOException {
+ final char buf[] = new char[10];
+ int read = 0;
+ try {
+ while ((read = reader.read(buf)) != -1) {
+ if (log != null)
+ log.append(buf, 0, read);
+ }
+ } catch (IOException e) {
+ reader.close();
+ throw new IOException(e);
+ }
+ reader.close();
+ }
+}
diff --git a/app/src/main/java/se/leap/bitmaskclient/utils/FirewallHelper.java b/app/src/main/java/se/leap/bitmaskclient/utils/FirewallHelper.java
new file mode 100644
index 00000000..26e6603a
--- /dev/null
+++ b/app/src/main/java/se/leap/bitmaskclient/utils/FirewallHelper.java
@@ -0,0 +1,196 @@
+package se.leap.bitmaskclient.utils;
+/**
+ * Copyright (c) 2019 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/>.
+ */
+
+import android.content.Context;
+import android.os.AsyncTask;
+import android.util.Log;
+
+import java.lang.ref.WeakReference;
+
+import de.blinkt.openvpn.core.VpnStatus;
+
+import static se.leap.bitmaskclient.utils.Cmd.runBlockingCmd;
+
+interface FirewallCallback {
+ void onFirewallStarted(boolean success);
+ void onFirewallStopped(boolean success);
+ void onSuRequested(boolean success);
+}
+
+
+public class FirewallHelper implements FirewallCallback {
+ private static String BITMASK_CHAIN = "bitmask_fw";
+ private static final String TAG = FirewallHelper.class.getSimpleName();
+
+ private Context context;
+
+ public FirewallHelper(Context context) {
+ this.context = context;
+ }
+
+
+ @Override
+ public void onFirewallStarted(boolean success) {
+ if (success) {
+ VpnStatus.logInfo("[FIREWALL] Custom rules established");
+ } else {
+ VpnStatus.logError("[FIREWALL] Could not establish custom rules.");
+ }
+ }
+
+ @Override
+ public void onFirewallStopped(boolean success) {
+ if (success) {
+ VpnStatus.logInfo("[FIREWALL] Custom rules deleted");
+ } else {
+ VpnStatus.logError("[FIREWALL] Could not delete custom rules");
+ }
+ }
+
+ @Override
+ public void onSuRequested(boolean success) {
+ PreferenceHelper.setSuPermission(context, success);
+ if (!success) {
+ VpnStatus.logError("[FIREWALL] Root permission needed to execute custom firewall rules.");
+ }
+ }
+
+
+ private static class StartFirewallTask extends AsyncTask<Void, Boolean, Boolean> {
+
+ WeakReference<FirewallCallback> callbackWeakReference;
+
+ StartFirewallTask(FirewallCallback callback) {
+ callbackWeakReference = new WeakReference<>(callback);
+ }
+
+ @Override
+ protected Boolean doInBackground(Void... voids) {
+ StringBuilder log = new StringBuilder();
+ String[] bitmaskChain = new String[]{
+ "su",
+ "id",
+ "ip6tables --list " + BITMASK_CHAIN };
+
+
+ try {
+ boolean hasBitmaskChain = runBlockingCmd(bitmaskChain, log) == 0;
+ boolean allowSu = log.toString().contains("uid=0");
+ try {
+ callbackWeakReference.get().onSuRequested(allowSu);
+ Thread.sleep(1000);
+ } catch (Exception e) {
+ //ignore
+ }
+
+ boolean success;
+ log = new StringBuilder();
+ if (!hasBitmaskChain) {
+ String[] createChainAndRules = new String[]{
+ "su",
+ "ip6tables --new-chain " + BITMASK_CHAIN,
+ "ip6tables --insert OUTPUT --jump " + BITMASK_CHAIN,
+ "ip6tables --append " + BITMASK_CHAIN + " -p tcp --jump REJECT",
+ "ip6tables --append " + BITMASK_CHAIN + " -p udp --jump REJECT"
+ };
+ success = runBlockingCmd(createChainAndRules, log) == 0;
+ Log.d(TAG, "added " + BITMASK_CHAIN + " to ip6tables: " + success);
+ Log.d(TAG, log.toString());
+ return success;
+ } else {
+ String[] addRules = new String[] {
+ "su",
+ "ip6tables --append " + BITMASK_CHAIN + " -p tcp --jump REJECT",
+ "ip6tables --append " + BITMASK_CHAIN + " -p udp --jump REJECT" };
+ return runBlockingCmd(addRules, log) == 0;
+ }
+ } catch (Exception e) {
+ e.printStackTrace();
+ Log.e(TAG, log.toString());
+ }
+ return false;
+ }
+
+ @Override
+ protected void onPostExecute(Boolean result) {
+ super.onPostExecute(result);
+ FirewallCallback callback = callbackWeakReference.get();
+ if (callback != null) {
+ callback.onFirewallStarted(result);
+ }
+ }
+ }
+
+ private static class ShutdownFirewallTask extends AsyncTask<Void, Boolean, Boolean> {
+
+ WeakReference<FirewallCallback> callbackWeakReference;
+
+ ShutdownFirewallTask(FirewallCallback callback) {
+ callbackWeakReference = new WeakReference<>(callback);
+ }
+
+ @Override
+ protected Boolean doInBackground(Void... voids) {
+ boolean success;
+ StringBuilder log = new StringBuilder();
+ String[] deleteChain = new String[]{
+ "su",
+ "id",
+ "ip6tables --delete OUTPUT --jump " + BITMASK_CHAIN,
+ "ip6tables --flush " + BITMASK_CHAIN,
+ "ip6tables --delete-chain " + BITMASK_CHAIN
+ };
+ try {
+ success = runBlockingCmd(deleteChain, log) == 0;
+ } catch (Exception e) {
+ e.printStackTrace();
+ Log.e(TAG, log.toString());
+ return false;
+ }
+
+ try {
+ boolean allowSu = log.toString().contains("uid=0");
+ callbackWeakReference.get().onSuRequested(allowSu);
+ } catch (Exception e) {
+ //ignore
+ }
+ return success;
+ }
+
+ @Override
+ protected void onPostExecute(Boolean result) {
+ super.onPostExecute(result);
+ FirewallCallback callback = callbackWeakReference.get();
+ if (callback != null) {
+ callback.onFirewallStopped(result);
+ }
+ }
+ }
+
+
+ public void startFirewall() {
+ StartFirewallTask task = new StartFirewallTask(this);
+ task.execute();
+ }
+
+ public void shutdownFirewall() {
+ ShutdownFirewallTask task = new ShutdownFirewallTask(this);
+ task.execute();
+ }
+
+}
diff --git a/app/src/main/java/se/leap/bitmaskclient/utils/PreferenceHelper.java b/app/src/main/java/se/leap/bitmaskclient/utils/PreferenceHelper.java
index 9eac7187..40bb2eca 100644
--- a/app/src/main/java/se/leap/bitmaskclient/utils/PreferenceHelper.java
+++ b/app/src/main/java/se/leap/bitmaskclient/utils/PreferenceHelper.java
@@ -31,6 +31,7 @@ import static se.leap.bitmaskclient.Constants.PROVIDER_EIP_DEFINITION;
import static se.leap.bitmaskclient.Constants.PROVIDER_PRIVATE_KEY;
import static se.leap.bitmaskclient.Constants.PROVIDER_VPN_CERTIFICATE;
import static se.leap.bitmaskclient.Constants.SHARED_PREFERENCES;
+import static se.leap.bitmaskclient.Constants.SU_PERMISSION;
import static se.leap.bitmaskclient.Constants.USE_PLUGGABLE_TRANSPORTS;
import static se.leap.bitmaskclient.Constants.EXCLUDED_APPS;
@@ -214,52 +215,36 @@ public class PreferenceHelper {
apply();
}
+ public static boolean hasSuPermission(Context context) {
+ return getBoolean(context, SU_PERMISSION, false);
+ }
+
+ public static void setSuPermission(Context context, boolean allowed) {
+ putBoolean(context, SU_PERMISSION, allowed);
+ }
+
public static boolean getUsePluggableTransports(Context context) {
- if (context == null) {
- return false;
- }
- SharedPreferences preferences = context.getSharedPreferences(SHARED_PREFERENCES, MODE_PRIVATE);
- return preferences.getBoolean(USE_PLUGGABLE_TRANSPORTS, false);
+ return getBoolean(context, USE_PLUGGABLE_TRANSPORTS, false);
}
public static void usePluggableTransports(Context context, boolean isEnabled) {
- if (context == null) {
- return;
- }
- SharedPreferences preferences = context.getSharedPreferences(SHARED_PREFERENCES, MODE_PRIVATE);
- preferences.edit().putBoolean(USE_PLUGGABLE_TRANSPORTS, isEnabled).apply();
+ putBoolean(context, USE_PLUGGABLE_TRANSPORTS, isEnabled);
}
public static void saveBattery(Context context, boolean isEnabled) {
- if (context == null) {
- return;
- }
- SharedPreferences preferences = context.getSharedPreferences(SHARED_PREFERENCES, MODE_PRIVATE);
- preferences.edit().putBoolean(DEFAULT_SHARED_PREFS_BATTERY_SAVER, isEnabled).apply();
+ putBoolean(context, DEFAULT_SHARED_PREFS_BATTERY_SAVER, isEnabled);
}
public static boolean getSaveBattery(Context context) {
- if (context == null) {
- return false;
- }
- SharedPreferences preferences = context.getSharedPreferences(SHARED_PREFERENCES, MODE_PRIVATE);
- return preferences.getBoolean(DEFAULT_SHARED_PREFS_BATTERY_SAVER, false);
+ return getBoolean(context, DEFAULT_SHARED_PREFS_BATTERY_SAVER, false);
}
public static void saveShowAlwaysOnDialog(Context context, boolean showAlwaysOnDialog) {
- if (context == null) {
- return;
- }
- SharedPreferences preferences = context.getSharedPreferences(SHARED_PREFERENCES, MODE_PRIVATE);
- preferences.edit().putBoolean(ALWAYS_ON_SHOW_DIALOG, showAlwaysOnDialog).apply();
+ putBoolean(context, ALWAYS_ON_SHOW_DIALOG, showAlwaysOnDialog);
}
public static boolean getShowAlwaysOnDialog(Context context) {
- if (context == null) {
- return true;
- }
- SharedPreferences preferences = context.getSharedPreferences(SHARED_PREFERENCES, MODE_PRIVATE);
- return preferences.getBoolean(ALWAYS_ON_SHOW_DIALOG, true);
+ return getBoolean(context, ALWAYS_ON_SHOW_DIALOG, true);
}
public static JSONObject getEipDefinitionFromPreferences(SharedPreferences preferences) {
@@ -296,9 +281,27 @@ public class PreferenceHelper {
return preferences.getString(key, defValue);
}
- public static void putString(Context context, String key, String value){
+ public static void putString(Context context, String key, String value) {
SharedPreferences preferences = context.getSharedPreferences(SHARED_PREFERENCES, MODE_PRIVATE);
preferences.edit().putString(key, value).apply();
}
+ public static Boolean getBoolean(Context context, String key, Boolean defValue) {
+ if (context == null) {
+ return false;
+ }
+
+ SharedPreferences preferences = context.getSharedPreferences(SHARED_PREFERENCES, MODE_PRIVATE);
+ return preferences.getBoolean(key, defValue);
+ }
+
+ public static void putBoolean(Context context, String key, Boolean value) {
+ if (context == null) {
+ return;
+ }
+
+ SharedPreferences preferences = context.getSharedPreferences(SHARED_PREFERENCES, MODE_PRIVATE);
+ preferences.edit().putBoolean(key, value).apply();
+ }
+
}