initial tor-integration to circumvent blocking attempts of the provider api

2 files changed, 207 insertions, 0 deletions

diff --git a/app/src/main/java/se/leap/bitmaskclient/tor/TorNotificationManager.java b/app/src/main/java/se/leap/bitmaskclient/tor/TorNotificationManager.java
new file mode 100644
index 00000000..71a2735c
--- /dev/null
+++ b/app/src/main/java/se/leap/bitmaskclient/tor/TorNotificationManager.java
@@ -0,0 +1,105 @@
+package se.leap.bitmaskclient.tor;
+/**
+ * Copyright (c) 2021 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.annotation.TargetApi;
+import android.app.Notification;
+import android.app.NotificationChannel;
+import android.app.NotificationManager;
+import android.content.Context;
+import android.os.Build;
+
+import androidx.annotation.NonNull;
+import androidx.core.app.NotificationCompat;
+
+import se.leap.bitmaskclient.R;
+
+public class TorNotificationManager {
+    public   final static int TOR_SERVICE_NOTIFICATION_ID = 10;
+    static final String NOTIFICATION_CHANNEL_NEWSTATUS_ID = "bitmask_tor_service_news";
+
+
+    public TorNotificationManager() {}
+
+
+    public static Notification buildTorForegroundNotification(Context context) {
+        NotificationManager notificationManager = initNotificationManager(context);
+        if (notificationManager == null) {
+            return null;
+        }
+        NotificationCompat.Builder notificationBuilder = initNotificationBuilderDefaults(context);
+        return notificationBuilder
+                .setSmallIcon(R.drawable.ic_bridge_36)
+                .setWhen(System.currentTimeMillis())
+                .setContentTitle("Using Bridges to configure provider.").build();
+    }
+
+    public void buildTorNotification(Context context, String state) {
+        NotificationManager notificationManager = initNotificationManager(context);
+        if (notificationManager == null) {
+            return;
+        }
+        NotificationCompat.Builder notificationBuilder = initNotificationBuilderDefaults(context);
+        notificationBuilder
+                .setSmallIcon(R.drawable.ic_bridge_36)
+                .setWhen(System.currentTimeMillis())
+                .setTicker(state)
+                .setContentTitle(context.getString(R.string.tor_provider_setup))
+                .setContentText(state);
+        notificationManager.notify(TOR_SERVICE_NOTIFICATION_ID, notificationBuilder.build());
+    }
+
+
+    private static NotificationManager initNotificationManager(Context context) {
+        NotificationManager notificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
+        if (notificationManager == null) {
+            return null;
+        }
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+            createNotificationChannel(notificationManager);
+        }
+        return notificationManager;
+    }
+
+    @TargetApi(26)
+    private static void createNotificationChannel(NotificationManager notificationManager) {
+        CharSequence name =  "Bitmask Tor Service";
+        String description = "Informs about usage of bridges to configure Bitmask.";
+        NotificationChannel channel = new NotificationChannel(NOTIFICATION_CHANNEL_NEWSTATUS_ID,
+                name,
+                NotificationManager.IMPORTANCE_LOW);
+        channel.setSound(null, null);
+        channel.setDescription(description);
+        notificationManager.createNotificationChannel(channel);
+    }
+
+    private static NotificationCompat.Builder initNotificationBuilderDefaults(Context context) {
+        NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(context, NOTIFICATION_CHANNEL_NEWSTATUS_ID);
+        notificationBuilder.
+                setDefaults(Notification.DEFAULT_ALL).
+                setAutoCancel(true);
+        return notificationBuilder;
+    }
+
+    public void cancelNotifications(Context context) {
+        NotificationManager notificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
+        if (notificationManager == null) {
+            return;
+        }
+        notificationManager.cancel(TOR_SERVICE_NOTIFICATION_ID);
+    }
+}
diff --git a/app/src/main/java/se/leap/bitmaskclient/tor/TorStatusObservable.java b/app/src/main/java/se/leap/bitmaskclient/tor/TorStatusObservable.java
new file mode 100644
index 00000000..ed4ae24b
--- /dev/null
+++ b/app/src/main/java/se/leap/bitmaskclient/tor/TorStatusObservable.java
@@ -0,0 +1,102 @@
+package se.leap.bitmaskclient.tor;
+
+import android.content.Context;
+import android.os.Handler;
+import android.util.Log;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+
+import java.util.Observable;
+
+import se.leap.bitmaskclient.R;
+
+public class TorStatusObservable extends Observable {
+
+    private static final String TAG = TorStatusObservable.class.getSimpleName();
+
+    public enum TorStatus {
+        ON,
+        OFF,
+        STARTING,
+        STOPPING,
+        UNKOWN
+    }
+
+    private static TorStatusObservable instance;
+    private TorStatus status = TorStatus.UNKOWN;
+    private final TorNotificationManager torNotificationManager;
+    private String lastError;
+    private int port = -1;
+
+    private TorStatusObservable() {
+        torNotificationManager = new TorNotificationManager();
+    }
+
+    public static TorStatusObservable getInstance() {
+        if (instance == null) {
+            instance = new TorStatusObservable();
+        }
+        return instance;
+    }
+
+    public static TorStatus getStatus() {
+        return getInstance().status;
+    }
+
+
+    public static void updateState(Context context, String status) {
+        try {
+            Log.d(TAG, "update tor state: " + status);
+            getInstance().status = TorStatus.valueOf(status);
+            if (getInstance().status == TorStatus.OFF) {
+                getInstance().torNotificationManager.cancelNotifications(context);
+            } else {
+                getInstance().torNotificationManager.buildTorNotification(context, getStringForCurrentStatus(context));
+            }
+            instance.setChanged();
+            instance.notifyObservers();
+
+
+        } catch (IllegalStateException e) {
+            e.printStackTrace();
+        }
+    }
+
+    public static void setLastError(String error) {
+        getInstance().lastError = error;
+        instance.setChanged();
+        instance.notifyObservers();
+    }
+
+    public static void setProxyPort(int port) {
+        getInstance().port = port;
+        instance.setChanged();
+        instance.notifyObservers();
+    }
+
+    public static int getProxyPort() {
+        return getInstance().port;
+    }
+
+
+    @Nullable
+    public String getLastError() {
+        return lastError;
+    }
+
+    private static String getStringForCurrentStatus(Context context) {
+        switch (getInstance().status) {
+            case ON:
+                return context.getString(R.string.tor_started);
+            case STARTING:
+                return context.getString(R.string.tor_starting);
+            case STOPPING:
+                return context.getString(R.string.tor_stopping);
+            case OFF:
+            case UNKOWN:
+                break;
+        }
+        return null;
+    }
+}