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[PrivacyBrowserAndroid.git] / app / src / main / java / com / stoutner / privacybrowser / helpers / OrbotProxyHelper.java
1 /*
2  * Copyright © 2016-2019 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.SharedPreferences;
28 import android.content.pm.PackageManager;
29 import android.net.Proxy;
30 import android.preference.PreferenceManager;
31 import android.util.ArrayMap;
32 import android.util.Log;
33
34 import androidx.appcompat.app.AlertDialog;
35
36 import com.stoutner.privacybrowser.activities.MainWebViewActivity;
37 import com.stoutner.privacybrowser.R;
38
39 import java.lang.reflect.Field;
40 import java.lang.reflect.InvocationTargetException;
41 import java.lang.reflect.Method;
42
43 public class OrbotProxyHelper {
44     public static void setProxy(Context privacyBrowserContext, Activity parentActivity, String proxyHost, String proxyPort) {
45         // Set the proxy values
46         System.setProperty("proxyHost", proxyHost);
47         System.setProperty("proxyPort", proxyPort);
48
49         // These entries shouldn't be needed if the above general settings are applied.  They are here for troubleshooting just in case.
50         //System.setProperty("http.proxyHost", proxyHost);
51         //System.setProperty("http.proxyPort", proxyPort);
52         //System.setProperty("https.proxyHost", proxyHost);
53         //System.setProperty("https.proxyPort", proxyPort);
54
55         // Use reflection to apply the new proxy values.
56         try {
57             // Get the application and APK classes.  Suppress the lint warning that reflection may not always work in the future and on all devices.
58             Class applicationClass = Class.forName("android.app.Application");
59             @SuppressLint("PrivateApi") Class loadedApkClass = Class.forName("android.app.LoadedApk");
60
61             // Get the declared fields.  Suppress the lint warning that `mLoadedApk` cannot be resolved.
62             @SuppressWarnings("JavaReflectionMemberAccess") Field mLoadedApkField = applicationClass.getDeclaredField("mLoadedApk");
63             Field mReceiversField = loadedApkClass.getDeclaredField("mReceivers");
64
65             // Allow the values to be changed.
66             mLoadedApkField.setAccessible(true);
67             mReceiversField.setAccessible(true);
68
69             // Get the APK object.
70             Object mLoadedApkObject = mLoadedApkField.get(privacyBrowserContext);
71
72             // Get an array map of the receivers.
73             ArrayMap receivers = (ArrayMap) mReceiversField.get(mLoadedApkObject);
74
75             // Set the proxy.
76             for (Object receiverMap : receivers.values()) {
77                 for (Object receiver : ((ArrayMap) receiverMap).keySet()) {
78                     // `Class<?>`, which is an `unbounded wildcard parameterized type`, must be used instead of `Class`, which is a `raw type`.  Otherwise, `receiveClass.getDeclaredMethod` is unhappy.
79                     Class<?> receiverClass = receiver.getClass();
80
81                     // Get the declared fields.
82                     final Field[] declaredFieldArray = receiverClass.getDeclaredFields();
83
84                     // Set the proxy for each field that is a `ProxyChangeListener`.
85                     for (Field field : declaredFieldArray) {
86                         if (field.getType().getName().contains("ProxyChangeListener")) {
87                             Method onReceiveMethod = receiverClass.getDeclaredMethod("onReceive", Context.class, Intent.class);
88                             Intent intent = new Intent(Proxy.PROXY_CHANGE_ACTION);
89                             onReceiveMethod.invoke(receiver, privacyBrowserContext, intent);
90                         }
91                     }
92                 }
93             }
94         } catch (ClassNotFoundException | NoSuchFieldException | IllegalAccessException | NoSuchMethodException | InvocationTargetException exception) {
95             Log.d("enableProxyThroughOrbot", "Exception: " + exception);
96         }
97
98         if (proxyPort.equals("8118")) {  // Orbot proxy was turned on.
99             try {  // Check to see if Orbot is installed.
100                 PackageManager packageManager = privacyBrowserContext.getPackageManager();
101                 packageManager.getPackageInfo("org.torproject.android", 0);
102
103                 // Ask Orbot to connect if its current status is not "ON".
104                 if (!MainWebViewActivity.orbotStatus.equals("ON")) {
105                     // Request Orbot to start.
106                     Intent orbotIntent = new Intent("org.torproject.android.intent.action.START");
107
108                     // Send the intent to the Orbot package.
109                     orbotIntent.setPackage("org.torproject.android");
110
111                     // Request a status response be sent back to this package.
112                     orbotIntent.putExtra("org.torproject.android.intent.extra.PACKAGE_NAME", privacyBrowserContext.getPackageName());
113
114                     // Make it so.
115                     privacyBrowserContext.sendBroadcast(orbotIntent);
116                 }
117             } catch (PackageManager.NameNotFoundException exception){  // If an exception is thrown, Orbot is not installed.
118                 // Use `AlertDialog.Builder` to create the `AlertDialog`.
119                 AlertDialog.Builder dialogBuilder;
120
121                 // Get a handle for the shared preferences.
122                 SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(privacyBrowserContext);
123
124                 // Get the theme preference.
125                 boolean darkTheme = sharedPreferences.getBoolean("dark_theme", false);
126
127                 // Set the style according to the theme.
128                 if (darkTheme) {
129                     dialogBuilder = new AlertDialog.Builder(parentActivity, R.style.PrivacyBrowserAlertDialogDark);
130                 } else {
131                     dialogBuilder = new AlertDialog.Builder(parentActivity, R.style.PrivacyBrowserAlertDialogLight);
132                 }
133
134                 // Set the message.
135                 dialogBuilder.setMessage(R.string.orbot_proxy_not_installed);
136
137                 // Set the positive button.
138                 dialogBuilder.setPositiveButton(R.string.close, (DialogInterface dialog, int which) -> {
139                     // Do nothing.  The `AlertDialog` will close automatically.
140                 });
141
142                 // Convert `dialogBuilder` to `alertDialog`.
143                 AlertDialog alertDialog = dialogBuilder.create();
144
145                 // Make it so.
146                 alertDialog.show();
147             }
148         }
149     }
150 }