Native android service implemented

client/android/src/org/amnezia/vpn/qt/PackageManagerHelper.java

@@ -0,0 +1,189 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+package org.amnezia.vpn.qt;
+
+import android.Manifest;
+import android.content.Context;
+import android.content.Intent;
+import android.content.pm.ApplicationInfo;
+import android.content.pm.PackageInfo;
+import android.content.pm.PackageManager;
+import android.content.pm.ResolveInfo;
+import android.graphics.Color;
+import android.graphics.drawable.ColorDrawable;
+import android.graphics.drawable.Drawable;
+import android.Manifest.permission;
+import android.net.Uri;
+import android.os.Build;
+import android.util.Log;
+import android.webkit.WebView;
+
+import org.json.JSONException;
+import org.json.JSONObject;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+import java.util.regex.Pattern;
+
+// Gets used by /platforms/android/androidAppListProvider.cpp
+public class PackageManagerHelper {
+  final static String TAG = "PackageManagerHelper";
+  final static int MIN_CHROME_VERSION = 65;
+
+  final static List<String> CHROME_BROWSERS = Arrays.asList(
+      new String[] {"com.google.android.webview", "com.android.webview", "com.google.chrome"});
+
+  private static String getAllAppNames(Context ctx) {
+    JSONObject output = new JSONObject();
+    PackageManager pm = ctx.getPackageManager();
+    List<String> browsers = getBrowserIDs(pm);
+    List<PackageInfo> packs = pm.getInstalledPackages(PackageManager.GET_PERMISSIONS);
+    for (int i = 0; i < packs.size(); i++) {
+      PackageInfo p = packs.get(i);
+      // Do not add ourselves and System Apps to the list, unless it might be a browser
+      if ((!isSystemPackage(p,pm) || browsers.contains(p.packageName))
+          && !isSelf(p)) {
+        String appid = p.packageName;
+        String appName = p.applicationInfo.loadLabel(pm).toString();
+        try {
+          output.put(appid, appName);
+        } catch (JSONException e) {
+          e.printStackTrace();
+        }
+      }
+    }
+    return output.toString();
+  }
+
+  private static Drawable getAppIcon(Context ctx, String id) {
+    try {
+      return ctx.getPackageManager().getApplicationIcon(id);
+    } catch (PackageManager.NameNotFoundException e) {
+      e.printStackTrace();
+    }
+    return new ColorDrawable(Color.TRANSPARENT);
+  }
+
+  private static boolean isSystemPackage(PackageInfo pkgInfo, PackageManager pm) {
+    if( (pkgInfo.applicationInfo.flags & ApplicationInfo.FLAG_SYSTEM) == 0){
+      // no system app
+      return false;
+    }
+    // For Systems Packages there are Cases where we want to add it anyway:
+    // Has the use Internet permission (otherwise makes no sense)
+    // Had at least 1 update (this means it's probably on any AppStore)
+    // Has a a launch activity (has a ui and is not just a system service)
+
+    if(!usesInternet(pkgInfo)){
+      return true;
+    }
+    if(!hadUpdate(pkgInfo)){
+      return true;
+    }
+    if(pm.getLaunchIntentForPackage(pkgInfo.packageName) == null){
+      // If there is no way to launch this from a homescreen, def a sys package
+      return true;
+    }
+    return false;
+  }
+  private static boolean isSelf(PackageInfo pkgInfo) {
+    return pkgInfo.packageName.equals("org.amnezia.vpn")
+        || pkgInfo.packageName.equals("org.amnezia.vpn.debug");
+  }
+  private static boolean usesInternet(PackageInfo pkgInfo){
+    if(pkgInfo.requestedPermissions == null){
+      return false;
+    }
+    for(int i=0; i < pkgInfo.requestedPermissions.length; i++) {
+      String permission = pkgInfo.requestedPermissions[i];
+      if(Manifest.permission.INTERNET.equals(permission)){
+        return true;
+      }
+    }
+    return false;
+  }
+  private static boolean hadUpdate(PackageInfo pkgInfo){
+    return pkgInfo.lastUpdateTime > pkgInfo.firstInstallTime;
+  }
+
+  // Returns List of all Packages that can classify themselves as browsers
+  private static List<String> getBrowserIDs(PackageManager pm) {
+    Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse("https://www.mozilla.org/"));
+    intent.addCategory(Intent.CATEGORY_BROWSABLE);
+    // We've tried using PackageManager.MATCH_DEFAULT_ONLY flag and found that browsers that
+    // are not set as the default browser won't be matched even if they had CATEGORY_DEFAULT set
+    // in the intent filter
+
+    List<ResolveInfo> resolveInfos = pm.queryIntentActivities(intent, PackageManager.MATCH_ALL);
+    List<String> browsers = new ArrayList<String>();
+    for (int i = 0; i < resolveInfos.size(); i++) {
+      ResolveInfo info = resolveInfos.get(i);
+      String browserID = info.activityInfo.packageName;
+      browsers.add(browserID);
+    }
+    return browsers;
+  }
+
+  // Gets called in AndroidAuthenticationListener;
+  public static boolean isWebViewSupported(Context ctx) {
+    Log.v(TAG, "Checking if installed Webview is compatible with FxA");
+    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.P) {
+      // The default Webview is able do to FXA
+      return true;
+    }
+    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+      PackageInfo pi = WebView.getCurrentWebViewPackage();
+      if (CHROME_BROWSERS.contains(pi.packageName)) {
+        return isSupportedChromeBrowser(pi);
+      }
+      return isNotAncientBrowser(pi);
+    }
+
+    // Before O the webview is hardcoded, but we dont know which package it is.
+    // Check if com.google.android.webview is installed
+    PackageManager pm = ctx.getPackageManager();
+    try {
+      PackageInfo pi = pm.getPackageInfo("com.google.android.webview", 0);
+      return isSupportedChromeBrowser(pi);
+    } catch (PackageManager.NameNotFoundException e) {
+    }
+    // Otherwise check com.android.webview
+    try {
+      PackageInfo pi = pm.getPackageInfo("com.android.webview", 0);
+      return isSupportedChromeBrowser(pi);
+    } catch (PackageManager.NameNotFoundException e) {
+    }
+    Log.e(TAG, "Android System WebView is not found");
+    // Giving up :(
+    return false;
+  }
+
+  private static boolean isSupportedChromeBrowser(PackageInfo pi) {
+    Log.d(TAG, "Checking Chrome Based Browser: " + pi.packageName);
+    Log.d(TAG, "version name: " + pi.versionName);
+    Log.d(TAG, "version code: " + pi.versionCode);
+    try {
+      String versionCode = pi.versionName.split(Pattern.quote(" "))[0];
+      String majorVersion = versionCode.split(Pattern.quote("."))[0];
+      int version = Integer.parseInt(majorVersion);
+      return version >= MIN_CHROME_VERSION;
+    } catch (Exception e) {
+      Log.e(TAG, "Failed to check Chrome Version Code " + pi.versionName);
+      return false;
+    }
+  }
+
+  private static boolean isNotAncientBrowser(PackageInfo pi) {
+    // Not a google chrome - So the version name is worthless
+    // Lets just make sure the WebView
+    // used is not ancient ==> Was updated in at least the last 365 days
+    Log.d(TAG, "Checking Chrome Based Browser: " + pi.packageName);
+    Log.d(TAG, "version name: " + pi.versionName);
+    Log.d(TAG, "version code: " + pi.versionCode);
+    double oneYearInMillis = 31536000000L;
+    return pi.lastUpdateTime > (System.currentTimeMillis() - oneYearInMillis);
+  }
+}

client/android/src/org/amnezia/vpn/qt/VPNActivity.java

@@ -0,0 +1,33 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+package org.amnezia.vpn.qt;
+
+import android.view.KeyEvent;
+
+public class VPNActivity extends org.qtproject.qt5.android.bindings.QtActivity {
+
+  @Override
+  public boolean onKeyDown(int keyCode, KeyEvent event) {
+    if (keyCode == KeyEvent.KEYCODE_BACK && event.getRepeatCount() == 0) {
+      onBackPressed();
+      return true;
+    }
+    return super.onKeyDown(keyCode, event);
+  }
+
+  @Override
+  public void onBackPressed() {
+    try {
+      if (!handleBackButton()) {
+        // Move the activity into paused state if back button was pressed
+        moveTaskToBack(true);
+      }
+    } catch (Exception e) {
+    }
+  }
+
+  // Returns true if MVPN has handled the back button
+  native boolean handleBackButton();
+}

client/android/src/org/amnezia/vpn/qt/VPNApplication.java

@@ -0,0 +1,18 @@
+package org.amnezia.vpn.qt;
+
+import android.app.Activity;
+import android.os.Bundle;
+
+import org.amnezia.vpn.BuildConfig;
+
+public class VPNApplication extends org.qtproject.qt5.android.bindings.QtApplication {
+
+  private static VPNApplication instance;
+
+  @Override
+  public void onCreate() {
+      super.onCreate();
+      VPNApplication.instance = this;
+  }
+
+}

client/android/src/org/amnezia/vpn/qt/VPNPermissionHelper.kt

@@ -0,0 +1,37 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+package org.amnezia.vpn.qt
+
+import android.content.Context
+import android.content.Intent
+
+class VPNPermissionHelper : android.net.VpnService() {
+    /**
+     * This small service does nothing else then checking if the vpn permission
+     * is present and prompting if not.
+     */
+    override fun onStartCommand(intent: Intent?, flags: Int, startId: Int): Int {
+        val intent = prepare(this.applicationContext)
+        if (intent != null) {
+            startActivityForResult(intent)
+        }
+        return START_NOT_STICKY
+    }
+
+    companion object {
+        @JvmStatic
+        fun startService(c: Context) {
+            val appC = c.applicationContext
+            appC.startService(Intent(appC, VPNPermissionHelper::class.java))
+        }
+    }
+
+    /**
+     * Fetches the Global QTAndroidActivity and calls startActivityForResult with the given intent
+     * Is used to request the VPN-Permission, if not given.
+     * Actually Implemented in src/platforms/android/AndroidController.cpp
+     */
+    external fun startActivityForResult(i: Intent)
+}