app/src/main/java/com/stoutner/privacybrowser/helpers/OrbotProxyHelper.java

   1 /*
   2  * Copyright © 2016-2018 Soren Stoutner <soren@stoutner.com>.
   3  *
   4  * This file is part of Privacy Browser <https://www.stoutner.com/privacy-browser>.
   5  *
   6  * Privacy Browser is free software: you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation, either version 3 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * Privacy Browser is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with Privacy Browser.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 package com.stoutner.privacybrowser.helpers;
  21
  22 import android.annotation.SuppressLint;
  23 import android.app.Activity;
  24 import android.content.Context;
  25 import android.content.DialogInterface;
  26 import android.content.Intent;
  27 import android.content.pm.PackageManager;
  28 import android.net.Proxy;
  29 import android.support.v7.app.AlertDialog;
  30 import android.util.ArrayMap;
  31 import android.util.Log;
  32
  33 import com.stoutner.privacybrowser.activities.MainWebViewActivity;
  34 import com.stoutner.privacybrowser.R;
  35
  36 import java.lang.reflect.Field;
  37 import java.lang.reflect.InvocationTargetException;
  38 import java.lang.reflect.Method;
  39
  40 public class OrbotProxyHelper {
  41     public static void setProxy(Context privacyBrowserContext, Activity parentActivity, String proxyHost, String proxyPort) {
  42
  43         // Set the proxy values
  44         System.setProperty("http.proxyHost", proxyHost);
  45         System.setProperty("http.proxyPort", proxyPort);
  46         System.setProperty("https.proxyHost", proxyHost);
  47         System.setProperty("https.proxyPort", proxyPort);
  48
  49         // Use reflection to apply the new proxy values.
  50         try {
  51             Class applicationClass = Class.forName("android.app.Application");
  52
  53             // Suppress the lint warning that `mLoadedApk` cannot be resolved.
  54             @SuppressWarnings("JavaReflectionMemberAccess") Field mLoadedApkField = applicationClass.getDeclaredField("mLoadedApk");
  55
  56             // `setAccessible(true)` allows the value of `mLoadedApkField` to be changed..
  57             mLoadedApkField.setAccessible(true);
  58             Object mLoadedApkObject = mLoadedApkField.get(privacyBrowserContext);
  59
  60             // Suppress the lint warning that reflection may not always work in the future and on all devices.
  61             @SuppressLint("PrivateApi") Class loadedApkClass = Class.forName("android.app.LoadedApk");
  62             Field mReceiversField = loadedApkClass.getDeclaredField("mReceivers");
  63
  64             // `setAccessible(true)` allows the value of `mReceiversField` to be changed.
  65             mReceiversField.setAccessible(true);
  66
  67             ArrayMap receivers = (ArrayMap) mReceiversField.get(mLoadedApkObject);
  68
  69             for (Object receiverMap : receivers.values()) {
  70                 for (Object receiver : ((ArrayMap) receiverMap).keySet()) {
  71                     // `Class<?>`, which is an `unbounded wildcard parameterized type`, must be used instead of `Class`, which is a `raw type`.
  72                     // Otherwise, `receiveClass.getDeclaredMethod` below will produce an error.
  73                     Class<?> receiverClass = receiver.getClass();
  74                     if (receiverClass.getName().contains("ProxyChangeListener")) {
  75                         Method onReceiveMethod = receiverClass.getDeclaredMethod("onReceive", Context.class, Intent.class);
  76                         Intent intent = new Intent(Proxy.PROXY_CHANGE_ACTION);
  77                         onReceiveMethod.invoke(receiver, privacyBrowserContext, intent);
  78                     }
  79                 }
  80             }
  81         } catch (ClassNotFoundException | NoSuchFieldException | IllegalAccessException | NoSuchMethodException | InvocationTargetException exception) {
  82             Log.d("enableProxyThroughOrbot", "Exception: " + exception);
  83         }
  84
  85         if (proxyPort.equals("8118")) {  // Orbot proxy was turned on.
  86             try {  // Check to see if Orbot is installed.
  87                 PackageManager packageManager = privacyBrowserContext.getPackageManager();
  88                 packageManager.getPackageInfo("org.torproject.android", PackageManager.GET_ACTIVITIES);
  89
  90                 // Ask Orbot to connect if its current status is not "ON".
  91                 if (!MainWebViewActivity.orbotStatus.equals("ON")) {
  92                     // Request Orbot to start.
  93                     Intent orbotIntent = new Intent("org.torproject.android.intent.action.START");
  94
  95                     // Send the intent to the Orbot package.
  96                     orbotIntent.setPackage("org.torproject.android");
  97
  98                     // Request a status response be sent back to this package.
  99                     orbotIntent.putExtra("org.torproject.android.intent.extra.PACKAGE_NAME", privacyBrowserContext.getPackageName());
 100
 101                     // Make it so.
 102                     privacyBrowserContext.sendBroadcast(orbotIntent);
 103                 }
 104             } catch (PackageManager.NameNotFoundException exception){  // If an exception is thrown, Orbot is not installed.
 105                 // Use `AlertDialog.Builder` to create the `AlertDialog`.
 106                 AlertDialog.Builder dialogBuilder;
 107
 108                 // Set the style according to the theme.
 109                 if (MainWebViewActivity.darkTheme) {
 110                     dialogBuilder = new AlertDialog.Builder(parentActivity, R.style.PrivacyBrowserAlertDialogDark);
 111                 } else {
 112                     dialogBuilder = new AlertDialog.Builder(parentActivity, R.style.PrivacyBrowserAlertDialogLight);
 113                 }
 114
 115                 // Set the message.
 116                 dialogBuilder.setMessage(R.string.orbot_proxy_not_installed);
 117
 118                 // Set the positive button.
 119                 dialogBuilder.setPositiveButton(R.string.close, (DialogInterface dialog, int which) -> {
 120                     // Do nothing.  The `AlertDialog` will close automatically.
 121                 });
 122
 123                 // Convert `dialogBuilder` to `alertDialog`.
 124                 AlertDialog alertDialog = dialogBuilder.create();
 125
 126                 // Make it so.
 127                 alertDialog.show();
 128             }
 129         }
 130     }
 131 }