From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Tad <tad@spotco.us>
Date: Thu, 20 Sep 2018 21:44:53 -0400
Subject: [PATCH] Add support for routing over Tor

Change-Id: Ibfe080c3d801af34fb64fda1b6b8f4f39a2b1ccf
---
 app/src/main/AndroidManifest.xml              |  4 ++
 .../lineageos/updater/UpdatesActivity.java    | 12 ++++
 .../updater/UpdatesCheckReceiver.java         |  4 ++
 .../updater/controller/UpdaterController.java |  8 +++
 .../updater/download/DownloadClient.java      |  8 ++-
 .../download/HttpURLConnectionClient.java     | 27 ++++++--
 .../org/lineageos/updater/misc/Constants.java |  1 +
 .../org/lineageos/updater/misc/Utils.java     | 65 +++++++++++++++++++
 .../main/res/layout/preferences_dialog.xml    |  8 +++
 app/src/main/res/values/strings.xml           |  2 +
 10 files changed, 134 insertions(+), 5 deletions(-)

diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 2abb833..6041740 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -18,6 +18,10 @@
     <uses-permission android:name="android.permission.START_ACTIVITIES_FROM_BACKGROUND" />
     <uses-permission android:name="android.permission.WAKE_LOCK" />
 
+    <queries>
+        <package android:name="org.torproject.android" />
+    </queries>
+
     <application
         android:allowBackup="false"
         android:icon="@mipmap/ic_launcher"
diff --git a/app/src/main/java/org/lineageos/updater/UpdatesActivity.java b/app/src/main/java/org/lineageos/updater/UpdatesActivity.java
index a4eda73..387eea0 100644
--- a/app/src/main/java/org/lineageos/updater/UpdatesActivity.java
+++ b/app/src/main/java/org/lineageos/updater/UpdatesActivity.java
@@ -462,10 +462,14 @@ public class UpdatesActivity extends UpdatesListActivity implements UpdateImport
 
         final DownloadClient downloadClient;
         try {
+            if(Utils.isOnionRoutingEnabled(getApplicationContext())) {
+                Utils.requestStartOrbot(getApplicationContext());
+            }
             downloadClient = new DownloadClient.Builder()
                     .setUrl(url)
                     .setDestination(jsonFileTmp)
                     .setDownloadCallback(callback)
+                    .setUseOnionRouting(Utils.isOnionRoutingEnabled(getApplicationContext()))
                     .build();
         } catch (IOException exception) {
             Log.e(TAG, "Could not build download client");
@@ -569,6 +573,7 @@ public class UpdatesActivity extends UpdatesListActivity implements UpdateImport
     private void showPreferencesDialog() {
         View view = LayoutInflater.from(this).inflate(R.layout.preferences_dialog, null);
         Spinner autoCheckInterval = view.findViewById(R.id.preferences_auto_updates_check_interval);
+        SwitchCompat onionRouting = view.findViewById(R.id.preferences_onion_routing);
         SwitchCompat autoDelete = view.findViewById(R.id.preferences_auto_delete_updates);
         SwitchCompat meteredNetworkWarning = view.findViewById(
                 R.id.preferences_metered_network_warning);
@@ -581,6 +586,7 @@ public class UpdatesActivity extends UpdatesListActivity implements UpdateImport
 
         SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
         autoCheckInterval.setSelection(Utils.getUpdateCheckSetting(this));
+        onionRouting.setChecked(prefs.getBoolean(Constants.PREF_ONION_ROUTING, false));
         autoDelete.setChecked(prefs.getBoolean(Constants.PREF_AUTO_DELETE_UPDATES, false));
         meteredNetworkWarning.setChecked(prefs.getBoolean(Constants.PREF_METERED_NETWORK_WARNING,
                 prefs.getBoolean(Constants.PREF_MOBILE_DATA_WARNING, true)));
@@ -621,6 +627,8 @@ public class UpdatesActivity extends UpdatesListActivity implements UpdateImport
                     prefs.edit()
                             .putInt(Constants.PREF_AUTO_UPDATES_CHECK_INTERVAL,
                                     autoCheckInterval.getSelectedItemPosition())
+                            .putBoolean(Constants.PREF_ONION_ROUTING,
+                                    onionRouting.isChecked() && Utils.isOrbotInstalled(getApplicationContext()))
                             .putBoolean(Constants.PREF_AUTO_DELETE_UPDATES, autoDelete.isChecked())
                             .putBoolean(Constants.PREF_METERED_NETWORK_WARNING,
                                     meteredNetworkWarning.isChecked())
@@ -634,6 +642,10 @@ public class UpdatesActivity extends UpdatesListActivity implements UpdateImport
                         UpdatesCheckReceiver.cancelUpdatesCheck(this);
                     }
 
+                    if(onionRouting.isChecked() && !Utils.isOrbotInstalled(getApplicationContext())) {
+                        showSnackbar(R.string.snack_orbot_not_available, Snackbar.LENGTH_LONG);
+                    }
+
                     if (Utils.isABDevice()) {
                         boolean enableABPerfMode = abPerfMode.isChecked();
                         mUpdaterService.getUpdaterController().setPerformanceMode(enableABPerfMode);
diff --git a/app/src/main/java/org/lineageos/updater/UpdatesCheckReceiver.java b/app/src/main/java/org/lineageos/updater/UpdatesCheckReceiver.java
index b065ed0..5767bfb 100644
--- a/app/src/main/java/org/lineageos/updater/UpdatesCheckReceiver.java
+++ b/app/src/main/java/org/lineageos/updater/UpdatesCheckReceiver.java
@@ -99,10 +99,14 @@ public class UpdatesCheckReceiver extends BroadcastReceiver {
         };
 
         try {
+            if(Utils.isOnionRoutingEnabled(context)) {
+                Utils.requestStartOrbot(context);
+            }
             DownloadClient downloadClient = new DownloadClient.Builder()
                     .setUrl(url)
                     .setDestination(jsonNew)
                     .setDownloadCallback(callback)
+                    .setUseOnionRouting(Utils.isOnionRoutingEnabled(context))
                     .build();
             downloadClient.start();
         } catch (IOException e) {
diff --git a/app/src/main/java/org/lineageos/updater/controller/UpdaterController.java b/app/src/main/java/org/lineageos/updater/controller/UpdaterController.java
index 691012c..4dbab2c 100644
--- a/app/src/main/java/org/lineageos/updater/controller/UpdaterController.java
+++ b/app/src/main/java/org/lineageos/updater/controller/UpdaterController.java
@@ -363,12 +363,16 @@ public class UpdaterController {
         update.setFile(destination);
         DownloadClient downloadClient;
         try {
+            if(Utils.isOnionRoutingEnabled(mContext)) {
+                Utils.requestStartOrbot(mContext);
+            }
             downloadClient = new DownloadClient.Builder()
                     .setUrl(update.getDownloadUrl())
                     .setDestination(update.getFile())
                     .setDownloadCallback(getDownloadCallback(downloadId))
                     .setProgressListener(getProgressListener(downloadId))
                     .setUseDuplicateLinks(true)
+                    .setUseOnionRouting(Utils.isOnionRoutingEnabled(mContext))
                     .build();
         } catch (IOException exception) {
             Log.e(TAG, "Could not build download client");
@@ -408,6 +412,9 @@ public class UpdaterController {
             verifyUpdateAsync(downloadId);
             notifyUpdateChange(downloadId);
         } else {
+            if(Utils.isOnionRoutingEnabled(mContext)) {
+                Utils.requestStartOrbot(mContext);
+            }
             DownloadClient downloadClient;
             try {
                 downloadClient = new DownloadClient.Builder()
@@ -416,6 +423,7 @@ public class UpdaterController {
                         .setDownloadCallback(getDownloadCallback(downloadId))
                         .setProgressListener(getProgressListener(downloadId))
                         .setUseDuplicateLinks(true)
+                        .setUseOnionRouting(Utils.isOnionRoutingEnabled(mContext))
                         .build();
             } catch (IOException exception) {
                 Log.e(TAG, "Could not build download client");
diff --git a/app/src/main/java/org/lineageos/updater/download/DownloadClient.java b/app/src/main/java/org/lineageos/updater/download/DownloadClient.java
index 0623d4f..bfc037e 100644
--- a/app/src/main/java/org/lineageos/updater/download/DownloadClient.java
+++ b/app/src/main/java/org/lineageos/updater/download/DownloadClient.java
@@ -49,6 +49,7 @@ public interface DownloadClient {
         private DownloadClient.DownloadCallback mCallback;
         private DownloadClient.ProgressListener mProgressListener;
         private boolean mUseDuplicateLinks;
+        private boolean mOnionRouting;
 
         public DownloadClient build() throws IOException {
             if (mUrl == null) {
@@ -59,7 +60,7 @@ public interface DownloadClient {
                 throw new IllegalStateException("No download callback defined");
             }
             return new HttpURLConnectionClient(mUrl, mDestination, mProgressListener, mCallback,
-                    mUseDuplicateLinks);
+                    mUseDuplicateLinks, mOnionRouting);
         }
 
         public Builder setUrl(String url) {
@@ -86,5 +87,10 @@ public interface DownloadClient {
             mUseDuplicateLinks = useDuplicateLinks;
             return this;
         }
+
+        public Builder setUseOnionRouting(boolean onionRouting) {
+            mOnionRouting = onionRouting;
+            return this;
+        }
     }
 }
diff --git a/app/src/main/java/org/lineageos/updater/download/HttpURLConnectionClient.java b/app/src/main/java/org/lineageos/updater/download/HttpURLConnectionClient.java
index 4ce3dd0..d39de45 100644
--- a/app/src/main/java/org/lineageos/updater/download/HttpURLConnectionClient.java
+++ b/app/src/main/java/org/lineageos/updater/download/HttpURLConnectionClient.java
@@ -7,12 +7,16 @@ package org.lineageos.updater.download;
 import android.os.SystemClock;
 import android.util.Log;
 
+import org.lineageos.updater.misc.Utils;
+
 import java.io.File;
 import java.io.FileOutputStream;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream;
 import java.net.HttpURLConnection;
+import java.net.InetSocketAddress;
+import java.net.Proxy;
 import java.net.URL;
 import java.util.Comparator;
 import java.util.List;
@@ -31,6 +35,7 @@ public class HttpURLConnectionClient implements DownloadClient {
     private final DownloadClient.ProgressListener mProgressListener;
     private final DownloadClient.DownloadCallback mCallback;
     private final boolean mUseDuplicateLinks;
+    private final boolean mUseOnionRouting;
 
     private DownloadThread mDownloadThread;
 
@@ -45,8 +50,14 @@ public class HttpURLConnectionClient implements DownloadClient {
     HttpURLConnectionClient(String url, File destination,
             DownloadClient.ProgressListener progressListener,
             DownloadClient.DownloadCallback callback,
-            boolean useDuplicateLinks) throws IOException {
-        mClient = (HttpURLConnection) new URL(url).openConnection();
+            boolean useDuplicateLinks, boolean useOnionRouting) throws IOException {
+        mUseOnionRouting = useOnionRouting;
+        if(mUseOnionRouting) {
+            Proxy orbot = new Proxy(Proxy.Type.SOCKS, new InetSocketAddress("127.0.0.1", 9050));
+            mClient = (HttpURLConnection) new URL(url).openConnection(orbot);
+        } else {
+            mClient = (HttpURLConnection) new URL(url).openConnection();
+        }
         mDestination = destination;
         mProgressListener = progressListener;
         mCallback = callback;
@@ -166,7 +177,12 @@ public class HttpURLConnectionClient implements DownloadClient {
         private void changeClientUrl(URL newUrl) throws IOException {
             String range = mClient.getRequestProperty("Range");
             mClient.disconnect();
-            mClient = (HttpURLConnection) newUrl.openConnection();
+            if(mUseOnionRouting) {
+                Proxy orbot = new Proxy(Proxy.Type.SOCKS, new InetSocketAddress("127.0.0.1", 9050));
+                mClient = (HttpURLConnection) newUrl.openConnection(orbot);
+            } else {
+                mClient = (HttpURLConnection) newUrl.openConnection();
+            }
             if (range != null) {
                 mClient.setRequestProperty("Range", range);
             }
@@ -221,7 +237,7 @@ public class HttpURLConnectionClient implements DownloadClient {
                     }
                     Log.d(TAG, "Downloading from " + newUrl);
                     changeClientUrl(url);
-                    mClient.setConnectTimeout(5000);
+                    mClient.setConnectTimeout(mUseOnionRouting ? 45000 : 5000);
                     mClient.connect();
                     if (!isSuccessCode(mClient.getResponseCode())) {
                         throw new IOException("Server replied with " + mClient.getResponseCode());
@@ -246,6 +262,9 @@ public class HttpURLConnectionClient implements DownloadClient {
         public void run() {
             boolean justResumed = false;
             try {
+                if(mUseOnionRouting) {
+                    Utils.waitUntilOrbotIsAvailable();
+                }
                 mClient.setInstanceFollowRedirects(!mUseDuplicateLinks);
                 mClient.connect();
                 int responseCode = mClient.getResponseCode();
diff --git a/app/src/main/java/org/lineageos/updater/misc/Constants.java b/app/src/main/java/org/lineageos/updater/misc/Constants.java
index a00dce1..825e1a0 100644
--- a/app/src/main/java/org/lineageos/updater/misc/Constants.java
+++ b/app/src/main/java/org/lineageos/updater/misc/Constants.java
@@ -19,6 +19,7 @@ public final class Constants {
 
     public static final String PREF_LAST_UPDATE_CHECK = "last_update_check";
     public static final String PREF_AUTO_UPDATES_CHECK_INTERVAL = "auto_updates_check_interval";
+    public static final String PREF_ONION_ROUTING = "onion_routing";
     public static final String PREF_AUTO_DELETE_UPDATES = "auto_delete_updates";
     public static final String PREF_AB_PERF_MODE = "ab_perf_mode";
     public static final String PREF_METERED_NETWORK_WARNING = "pref_metered_network_warning";
diff --git a/app/src/main/java/org/lineageos/updater/misc/Utils.java b/app/src/main/java/org/lineageos/updater/misc/Utils.java
index 13179a1..3d4aab9 100644
--- a/app/src/main/java/org/lineageos/updater/misc/Utils.java
+++ b/app/src/main/java/org/lineageos/updater/misc/Utils.java
@@ -35,6 +35,7 @@ import java.io.BufferedReader;
 import java.io.File;
 import java.io.FileReader;
 import java.io.IOException;
+import java.net.Socket;
 import java.util.ArrayList;
 import java.util.Enumeration;
 import java.util.HashSet;
@@ -140,11 +141,75 @@ public class Utils {
         return updates;
     }
 
+    //Credit: https://stackoverflow.com/a/6758962
+    public static boolean isPackageInstalled(Context context, String packageID) {
+        PackageManager pm = context.getPackageManager();
+        try {
+            pm.getPackageInfo(packageID, PackageManager.GET_META_DATA);
+        } catch(PackageManager.NameNotFoundException e) {
+            return false;
+        }
+        return true;
+    }
+
+    public static boolean isOrbotInstalled(Context context) {
+        return isPackageInstalled(context, "org.torproject.android");
+    }
+
+    public static boolean isOnionRoutingEnabled(Context context) {
+        SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(context);
+        return preferences.getBoolean(Constants.PREF_ONION_ROUTING, false);
+    }
+
+    //Credit: OrbotHelper/NetCipher
+    public static void requestStartOrbot(Context context) {
+        Intent intent = new Intent("org.torproject.android.intent.action.START");
+        intent.setPackage("org.torproject.android");
+        intent.putExtra("org.torproject.android.intent.extra.PACKAGE_NAME", context.getPackageName());
+        context.sendBroadcast(intent);
+    }
+
+    //Credit: https://www.geekality.net/2013/04/30/java-simple-check-to-see-if-a-server-is-listening-on-a-port/
+    public static boolean isPortListening(String host, int port) {
+        Socket s = null;
+        try {
+            s = new Socket(host, port);
+            return true;
+        } catch(Exception e) {
+            return false;
+        } finally {
+            if (s != null) {
+                try {
+                    s.close();
+                } catch(Exception e1) {
+                }
+            }
+        }
+    }
+
+    public static boolean waitUntilOrbotIsAvailable() {
+        int tries = 0;
+        boolean listening;
+        while(!(listening = isPortListening("127.0.0.1", 9050)) && tries <= 60) {
+            tries++;
+            try {
+                Thread.sleep(1000);
+            } catch(Exception e) {
+
+            }
+        }
+        return listening;
+    }
+
     public static String getServerURL(Context context) {
         String incrementalVersion = SystemProperties.get(Constants.PROP_BUILD_VERSION_INCREMENTAL);
         String device = SystemProperties.get(Constants.PROP_NEXT_DEVICE,
                 SystemProperties.get(Constants.PROP_DEVICE));
         String server = "0OTA_SERVER_CLEARNET0";
+        String serverOnion = "0OTA_SERVER_ONION0";
+        if(serverOnion.toLowerCase().startsWith("http") && isOnionRoutingEnabled(context)) {
+            server = serverOnion;
+        }
 
         return server + "?base=LineageOS&device=" + device + "&inc=" + incrementalVersion;
     }
diff --git a/app/src/main/res/layout/preferences_dialog.xml b/app/src/main/res/layout/preferences_dialog.xml
index 774d1be..8a01e3d 100644
--- a/app/src/main/res/layout/preferences_dialog.xml
+++ b/app/src/main/res/layout/preferences_dialog.xml
@@ -33,6 +33,14 @@
             android:entries="@array/menu_auto_updates_check_interval_entries" />
     </LinearLayout>
 
+    <androidx.appcompat.widget.SwitchCompat
+        android:id="@+id/preferences_onion_routing"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_marginBottom="16dp"
+        android:text="@string/menu_onion_routing"
+        android:textSize="16sp" />
+
     <androidx.appcompat.widget.SwitchCompat
         android:id="@+id/preferences_auto_delete_updates"
         android:layout_width="match_parent"
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 0303481..46bb291 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -68,6 +68,7 @@
     <string name="menu_auto_updates_check_interval_weekly">Once a week</string>
     <string name="menu_auto_updates_check_interval_monthly">Once a month</string>
     <string name="menu_auto_updates_check_interval_never">Never</string>
+    <string name="menu_onion_routing">Perform requests over Tor</string>
     <string name="menu_auto_delete_updates">Delete updates when installed</string>
     <string name="menu_delete_update">Delete</string>
     <string name="menu_copy_url">Copy URL</string>
@@ -85,6 +86,7 @@
     <string name="snack_download_failed">The download failed. Please check your internet connection and try again later.</string>
     <string name="snack_download_verification_failed">The update verification failed.</string>
     <string name="snack_download_verified">Download completed.</string>
+    <string name="snack_orbot_not_available">Orbot is not installed, disabling Tor routing!</string>
 
     <string name="snack_update_not_installable">This update can\'t be installed on top of the current build.</string>