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         // Set the proxy values
  43         System.setProperty("http.proxyHost", proxyHost);
  44         System.setProperty("http.proxyPort", proxyPort);
  45         System.setProperty("https.proxyHost", proxyHost);
  46         System.setProperty("https.proxyPort", proxyPort);
  47
  48         // Use reflection to apply the new proxy values.
  49         try {
  50             // Get the application and APK classes.  Suppress the lint warning that reflection may not always work in the future and on all devices.
  51             Class applicationClass = Class.forName("android.app.Application");
  52             @SuppressLint("PrivateApi") Class loadedApkClass = Class.forName("android.app.LoadedApk");
  53
  54             // Get the declared fields.  Suppress the lint warning that `mLoadedApk` cannot be resolved.
  55             @SuppressWarnings("JavaReflectionMemberAccess") Field mLoadedApkField = applicationClass.getDeclaredField("mLoadedApk");
  56             Field mReceiversField = loadedApkClass.getDeclaredField("mReceivers");
  57
  58             // Allow the values to be changed.
  59             mLoadedApkField.setAccessible(true);
  60             mReceiversField.setAccessible(true);
  61
  62             // Get the APK object.
  63             Object mLoadedApkObject = mLoadedApkField.get(privacyBrowserContext);
  64
  65             // Get an array map of the receivers.
  66             ArrayMap receivers = (ArrayMap) mReceiversField.get(mLoadedApkObject);
  67
  68             // Set the proxy.
  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`.  Otherwise, `receiveClass.getDeclaredMethod` is unhappy.
  72                     Class<?> receiverClass = receiver.getClass();
  73
  74                     // Get the declared fields.
  75                     final Field[] declaredFieldArray = receiverClass.getDeclaredFields();
  76
  77                     // Set the proxy for each field that is a `ProxyChangeListener`.
  78                     for (Field field : declaredFieldArray) {
  79                         if (field.getType().getName().contains("ProxyChangeListener")) {
  80                             Method onReceiveMethod = receiverClass.getDeclaredMethod("onReceive", Context.class, Intent.class);
  81                             Intent intent = new Intent(Proxy.PROXY_CHANGE_ACTION);
  82                             onReceiveMethod.invoke(receiver, privacyBrowserContext, intent);
  83                         }
  84                     }
  85                 }
  86             }
  87         } catch (ClassNotFoundException | NoSuchFieldException | IllegalAccessException | NoSuchMethodException | InvocationTargetException exception) {
  88             Log.d("enableProxyThroughOrbot", "Exception: " + exception);
  89         }
  90
  91         if (proxyPort.equals("8118")) {  // Orbot proxy was turned on.
  92             try {  // Check to see if Orbot is installed.
  93                 PackageManager packageManager = privacyBrowserContext.getPackageManager();
  94                 packageManager.getPackageInfo("org.torproject.android", PackageManager.GET_ACTIVITIES);
  95
  96                 // Ask Orbot to connect if its current status is not "ON".
  97                 if (!MainWebViewActivity.orbotStatus.equals("ON")) {
  98                     // Request Orbot to start.
  99                     Intent orbotIntent = new Intent("org.torproject.android.intent.action.START");
 100
 101                     // Send the intent to the Orbot package.
 102                     orbotIntent.setPackage("org.torproject.android");
 103
 104                     // Request a status response be sent back to this package.
 105                     orbotIntent.putExtra("org.torproject.android.intent.extra.PACKAGE_NAME", privacyBrowserContext.getPackageName());
 106
 107                     // Make it so.
 108                     privacyBrowserContext.sendBroadcast(orbotIntent);
 109                 }
 110             } catch (PackageManager.NameNotFoundException exception){  // If an exception is thrown, Orbot is not installed.
 111                 // Use `AlertDialog.Builder` to create the `AlertDialog`.
 112                 AlertDialog.Builder dialogBuilder;
 113
 114                 // Set the style according to the theme.
 115                 if (MainWebViewActivity.darkTheme) {
 116                     dialogBuilder = new AlertDialog.Builder(parentActivity, R.style.PrivacyBrowserAlertDialogDark);
 117                 } else {
 118                     dialogBuilder = new AlertDialog.Builder(parentActivity, R.style.PrivacyBrowserAlertDialogLight);
 119                 }
 120
 121                 // Set the message.
 122                 dialogBuilder.setMessage(R.string.orbot_proxy_not_installed);
 123
 124                 // Set the positive button.
 125                 dialogBuilder.setPositiveButton(R.string.close, (DialogInterface dialog, int which) -> {
 126                     // Do nothing.  The `AlertDialog` will close automatically.
 127                 });
 128
 129                 // Convert `dialogBuilder` to `alertDialog`.
 130                 AlertDialog alertDialog = dialogBuilder.create();
 131
 132                 // Make it so.
 133                 alertDialog.show();
 134             }
 135         }
 136     }
 137 }