Reworked basic orbot integration

app/build.gradle

@@ -37,6 +37,7 @@ dependencies {
     // More libraries
     compile 'com.getbase:floatingactionbutton:1.9.1'
     compile 'com.jakewharton:butterknife:8.0.1'
+    compile 'info.guardianproject.netcipher:netcipher:1.2.1'
     apt 'com.jakewharton:butterknife-compiler:8.0.1'
 
 }

app/src/main/java/com/github/dfa/diaspora_android/activity/MainActivity.java

@@ -82,6 +82,7 @@ import com.github.dfa.diaspora_android.listener.WebUserProfileChangedListener;
 import com.github.dfa.diaspora_android.ui.ContextMenuWebView;
 import com.github.dfa.diaspora_android.ui.CustomWebViewClient;
 import com.github.dfa.diaspora_android.util.Helpers;
+import com.github.dfa.diaspora_android.util.ProxyHandler;
 
 import org.json.JSONException;
 
@@ -97,6 +98,7 @@ import java.util.Locale;
 import butterknife.BindView;
 import butterknife.ButterKnife;
 import butterknife.OnClick;
+import info.guardianproject.netcipher.proxy.OrbotHelper;
 
 public class MainActivity extends AppCompatActivity
         implements NavigationView.OnNavigationItemSelectedListener, WebUserProfileChangedListener {
@@ -174,6 +176,16 @@ public class MainActivity extends AppCompatActivity
         appSettings = app.getSettings();
         podUserProfile = new PodUserProfile(app, uiHandler, this);
 
+        ProxyHandler.getInstance(this, appSettings).registerOrbotReceiver(this);
+        if(appSettings.isProxyOrbot()) {
+            if(!OrbotHelper.isOrbotInstalled(this)) {
+                appSettings.setProxyOrbot(false);
+                promptInstallOrbot();
+            } else {
+                Toast.makeText(this, "Orbot Proxy: "+ProxyHandler.getInstance(null, null).getActiveProxy(), Toast.LENGTH_SHORT).show();
+            }
+        }
+
         this.registerForContextMenu(webView);
         webView.setParentActivity(this);
         webView.setOverScrollMode(WebView.OVER_SCROLL_ALWAYS);
@@ -306,7 +318,13 @@ public class MainActivity extends AppCompatActivity
             }
         });
 
+        if(!appSettings.isProxyOrbot()) {
+            ProxyHandler.getInstance(null, null).unregisterOrbotReceiver(this);
+            afterOnCreate(savedInstanceState);
+        }
+    }
 
+    private void afterOnCreate(Bundle savedInstanceState) {
         if (savedInstanceState == null) {
             if (Helpers.isOnline(MainActivity.this)) {
                 webView.loadData("", "text/html", null);
@@ -404,6 +422,9 @@ public class MainActivity extends AppCompatActivity
     @Override
     protected void onResume() {
         super.onResume();
+        try {
+            ProxyHandler.getInstance(null, null).registerOrbotReceiver(this);
+        } catch (IllegalStateException e){}
         registerReceiver(brLoadUrl, new IntentFilter(URL_MESSAGE));
     }
 
@@ -441,6 +462,7 @@ public class MainActivity extends AppCompatActivity
     @Override
     protected void onPause() {
         unregisterReceiver(brLoadUrl);
+        ProxyHandler.getInstance(null, null).unregisterOrbotReceiver(this);
         super.onPause();
     }
 
@@ -926,7 +948,8 @@ public class MainActivity extends AppCompatActivity
 
             case R.id.nav_settings_app: {
                 final CharSequence[] options = {getString(R.string.settings_font), getString(R.string.settings_view), appSettings.isLoadImages() ?
-                        getString(R.string.settings_images_switch_off) : getString(R.string.settings_images_switch_on), getString(R.string.jb_pod)};
+                        getString(R.string.settings_images_switch_off) : getString(R.string.settings_images_switch_on), getString(R.string.jb_pod),
+                appSettings.isProxyOrbot() ? getString(R.string.orbot_proxy_enabled) : getString(R.string.orbot_proxy_disabled)};
 
                 if (Helpers.isOnline(MainActivity.this)) {
                     new AlertDialog.Builder(MainActivity.this)
@@ -959,6 +982,13 @@ public class MainActivity extends AppCompatActivity
                                                             })
                                                     .show();
                                             break;
+                                        case 4:
+                                            if(appSettings.isProxyOrbot()) {
+                                                ProxyHandler.getInstance(null,null).setProxy(MainActivity.this, null, 0, ProxyHandler.NO_PROXY);
+                                            } else {
+                                                OrbotHelper.requestStartTor(MainActivity.this);
+                                            }
+                                            appSettings.setProxyOrbot(!appSettings.isProxyOrbot());
                                     }
                                 }
                             }).show();
@@ -1029,7 +1059,7 @@ public class MainActivity extends AppCompatActivity
         }
 
         DrawerLayout drawer = (DrawerLayout) findViewById(R.id.main__layout);
-        drawer.closeDrawer(GravityCompat.START);
+        if(drawer != null) drawer.closeDrawer(GravityCompat.START);
         return true;
     }
 
@@ -1049,4 +1079,50 @@ public class MainActivity extends AppCompatActivity
                         grantResults);
         }
     }
+
+    /**
+     * Ask the user whether to install Orbot or not. Check if installing from
+     * F-Droid or Google Play, otherwise take the user to the Orbot download
+     * page on f-droid.org.
+     */
+    void promptInstallOrbot() {
+        String message = this.getString(R.string.you_must_have_orbot) + "  ";
+
+        final Intent intent = OrbotHelper.getOrbotInstallIntent(MainActivity.this);
+        if (intent.getPackage() == null) {
+            message += MainActivity.this.getString(R.string.download_orbot_from_fdroid);
+        } else {
+            message += MainActivity.this.getString(R.string.get_orbot_from_fdroid);
+        }
+
+        AlertDialog.Builder builder = new AlertDialog.Builder(this);
+        builder.setTitle(R.string.install_orbot_);
+        builder.setMessage(message);
+        builder.setPositiveButton(android.R.string.yes, new DialogInterface.OnClickListener() {
+            @Override
+            public void onClick(DialogInterface dialogInterface, int i) {
+                MainActivity.this.startActivity(intent);
+            }
+        });
+        builder.setNegativeButton(android.R.string.no, null);
+        builder.show();
+    }
+
+    public void requestOrbotStart(boolean backgroundStartsDisabled) {
+        AlertDialog.Builder startDialog = new AlertDialog.Builder(this);
+        startDialog.setTitle(R.string.start_orbot_);
+        if(backgroundStartsDisabled)
+            startDialog.setMessage(R.string.orbot_starts_disabled_message);
+        else
+            startDialog.setMessage(R.string.orbot_doesn_t_appear_to_be_running_would_you_like_to_start_it_up_and_connect_to_tor_);
+
+        startDialog.setPositiveButton(android.R.string.yes, new DialogInterface.OnClickListener() {
+            @Override
+            public void onClick(DialogInterface dialogInterface, int i) {
+                startActivityForResult(OrbotHelper.getShowOrbotStartIntent(), 1);
+            }
+        });
+        startDialog.setNegativeButton(android.R.string.no, null);
+        startDialog.show();
+    }
 }

app/src/main/java/com/github/dfa/diaspora_android/data/AppSettings.java

@@ -65,6 +65,7 @@ public class AppSettings {
         private static final String PODUSERPROFILE_NAME = "podUserProfile_name";
         private static final String PODUSERPROFILE_ID = "podUserProfile_guid";
         private static final String PODDOMAIN = "podDomain";
+        private static final String IS_PROXY_ORBOT = "proxyViaOrbot";
     }
 
 
@@ -132,4 +133,12 @@ public class AppSettings {
     public void setPreviousPodlist(String[] pods){
         setStringArray(prefApp, PREF.PREVIOUS_PODLIST, pods);
     }
+
+    public boolean isProxyOrbot() {
+        return prefApp.getBoolean(PREF.IS_PROXY_ORBOT, false);
+    }
+
+    public void setProxyOrbot(boolean active) {
+        setBool(prefApp, PREF.IS_PROXY_ORBOT, active);
+    }
 }

app/src/main/java/com/github/dfa/diaspora_android/util/ProxyHandler.java

@@ -0,0 +1,143 @@
+package com.github.dfa.diaspora_android.util;
+
+import android.app.AlarmManager;
+import android.app.PendingIntent;
+import android.content.BroadcastReceiver;
+import android.content.Context;
+import android.content.Intent;
+import android.content.IntentFilter;
+import android.util.Log;
+
+import com.github.dfa.diaspora_android.App;
+import com.github.dfa.diaspora_android.activity.MainActivity;
+import com.github.dfa.diaspora_android.data.AppSettings;
+
+import info.guardianproject.netcipher.NetCipher;
+import info.guardianproject.netcipher.proxy.OrbotHelper;
+import info.guardianproject.netcipher.web.WebkitProxy;
+
+/**
+ * Handle proxy configurations
+ * In this particular case integration of Orbot as a proxy for the tor network has been done,
+ * but other proxies can easily and similarly be added as well.
+ * Created by vanitas on 05.06.16.
+ */
+public class ProxyHandler {
+    //TODO: Remove when NetCipher > 1.2.1 releases
+    public final static String EXTRA_PROXY_PORT_HTTP = "org.torproject.android.intent.extra.HTTP_PROXY_PORT";
+    //Proxy types
+    public static final int NO_PROXY = 0, ORBOT_PROXY = 1;
+    private int activeProxy = NO_PROXY;
+
+    private static ProxyHandler instance;
+    private MainActivity mainActivity;
+    private AppSettings appSettings;
+    private OrbotReceiver orbotReceiver;
+
+
+    private ProxyHandler(MainActivity main, AppSettings settings) {
+        orbotReceiver = new OrbotReceiver();
+        mainActivity = main;
+        appSettings = settings;
+    }
+
+    public static ProxyHandler getInstance(MainActivity main, AppSettings settings) {
+        if(instance == null) instance = new ProxyHandler(main, settings);
+        return instance;
+    }
+
+    public void registerOrbotReceiver(Context context) {
+        if(!orbotReceiver.isRegistered()) {
+            context.registerReceiver(orbotReceiver, new IntentFilter(OrbotHelper.ACTION_STATUS));
+            orbotReceiver.setRegistered(true);
+        }
+        else throw new IllegalStateException("OrbotReceiver is already registered.");
+    }
+
+    public void unregisterOrbotReceiver(Context context) {
+        if(orbotReceiver.isRegistered()) {
+            context.unregisterReceiver(orbotReceiver);
+            orbotReceiver.setRegistered(false);
+        }
+        else throw new IllegalStateException("OrbotReceiver was not registered and can therefore not be unregistered.");
+    }
+
+    public void setProxy(Context context, String host, int port, int proxyType) {
+        if(proxyType == NO_PROXY) {
+            try {
+                NetCipher.clearProxy();
+                WebkitProxy.resetProxy(MainActivity.class.getName(), context);
+                activeProxy = proxyType;
+            }
+            catch (Exception e) {
+                Log.e(App.TAG, "ProxyHandler caught exception "+e.getClass().getName()+" while resetting proxy.");
+            }
+            restartApplication(context);
+            return;
+        }
+
+        if(proxyType == ORBOT_PROXY) {
+            try {
+                NetCipher.setProxy(host, port);
+                WebkitProxy.setProxy(MainActivity.class.getName(), context.getApplicationContext(), null, host, port);
+                activeProxy = proxyType;
+            } catch (Exception e) {
+                Log.d(App.TAG, "ProxyHandler caught exception " + e.getClass().getName() + " while setting proxy.");
+                e.printStackTrace();
+            }
+        }
+
+        //Add further proxies here
+    }
+
+    private static void restartApplication(Context context) {
+        Intent mStartActivity = new Intent(context, MainActivity.class);
+        PendingIntent mPendingIntent = PendingIntent.getActivity(context, 12374, mStartActivity, PendingIntent.FLAG_CANCEL_CURRENT);
+        AlarmManager mgr = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
+        mgr.set(AlarmManager.RTC, System.currentTimeMillis() + 100, mPendingIntent);
+        System.exit(0);
+    }
+
+    private static class OrbotReceiver extends BroadcastReceiver {
+        private boolean registered;
+
+        private boolean orbotRunning = false;
+        private int proxyPort = -1;
+        private String proxyHost = "127.0.0.1";
+
+
+        @Override
+        public void onReceive(Context context, Intent intent) {
+            if(OrbotHelper.ACTION_STATUS.equals(intent.getAction())) {
+
+                if(OrbotHelper.STATUS_ON.equals(intent.getStringExtra(OrbotHelper.EXTRA_STATUS))) {
+                    proxyPort = intent.getIntExtra(EXTRA_PROXY_PORT_HTTP, -1);
+                    if(instance.appSettings.isProxyOrbot()) {
+                        instance.setProxy(context, proxyHost, proxyPort, ORBOT_PROXY);
+                    }
+                    orbotRunning = true;
+                }
+
+                if(OrbotHelper.STATUS_OFF.equals(intent.getStringExtra(OrbotHelper.EXTRA_STATUS))) {
+                    instance.mainActivity.requestOrbotStart(false);
+                }
+
+                if(OrbotHelper.STATUS_STARTS_DISABLED.equals(intent.getStringExtra(OrbotHelper.EXTRA_STATUS))) {
+                    instance.mainActivity.requestOrbotStart(true);
+                }
+            }
+        }
+
+        public boolean isRegistered() {
+            return registered;
+        }
+
+        public void setRegistered(boolean r) {
+            registered = r;
+        }
+    }
+
+    public int getActiveProxy() {
+        return activeProxy;
+    }
+}

app/src/main/res/values/strings.xml

@@ -211,4 +211,15 @@
     <string name="prefix_https" translatable="false">https://</string>
     <string name="share_dotdodot">Share…</string>
     <string name="app_hashtag" translatable="false">#DiasporaForAndroid</string>
+
+    <string name="install_orbot_">Install Orbot?</string>
+    <string name="you_must_have_orbot">You must have Orbot installed and activated to proxy traffic through it.</string>
+    <string name="get_orbot_from_fdroid">Would you like to install it from F-Droid?</string>
+    <string name="download_orbot_from_fdroid">Would you like to download it from f-droid.org?</string>
+    <string name="start_orbot_">Start Orbot?</string>
+    <string name="orbot_doesn_t_appear_to_be_running_would_you_like_to_start_it_up_and_connect_to_tor_">Orbot doesn\'t appear to be running. Would you like to start it up and connect to Tor?</string>
+    <string name="orbot_starts_disabled_message">Orbot has background starts disabled. Would you like to open Orbot?</string>
+    <string name="orbot_proxy_enabled">Orbot Proxy: Enabled</string>
+    <string name="orbot_proxy_disabled">Orbot Proxy: Disabled</string>
+
 </resources>