mirror of
https://github.com/bitwarden/android.git
synced 2024-11-01 15:45:42 +03:00
542 lines
22 KiB
C#
542 lines
22 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Linq;
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using Android.AccessibilityServices;
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using Android.App;
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using Android.Content;
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using Android.OS;
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using Android.Views.Accessibility;
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using Bit.App.Abstractions;
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using XLabs.Ioc;
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using Bit.App.Resources;
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namespace Bit.Android
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{
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[Service(Permission = global::Android.Manifest.Permission.BindAccessibilityService, Label = "Bitwarden")]
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[IntentFilter(new string[] { "android.accessibilityservice.AccessibilityService" })]
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[MetaData("android.accessibilityservice", Resource = "@xml/accessibilityservice")]
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public class AutofillService : AccessibilityService
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{
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private NotificationChannel _notificationChannel;
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private const string BitwardenTag = "bw_access";
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private const int AutoFillNotificationId = 34573;
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private const string SystemUiPackage = "com.android.systemui";
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private const string BitwardenPackage = "com.x8bit.bitwarden";
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private const string BitwardenWebsite = "vault.bitwarden.com";
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private static Dictionary<string, Browser> SupportedBrowsers => new List<Browser>
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{
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new Browser("com.android.chrome", "url_bar"),
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new Browser("com.chrome.beta", "url_bar"),
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new Browser("org.chromium.chrome", "url_bar"),
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new Browser("com.android.browser", "url"),
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new Browser("com.brave.browser", "url_bar"),
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new Browser("com.opera.browser", "url_field"),
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new Browser("com.opera.browser.beta", "url_field"),
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new Browser("com.opera.mini.native", "url_field"),
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new Browser("com.chrome.dev", "url_bar"),
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new Browser("com.chrome.canary", "url_bar"),
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new Browser("com.google.android.apps.chrome", "url_bar"),
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new Browser("com.google.android.apps.chrome_dev", "url_bar"),
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new Browser("org.codeaurora.swe.browser", "url_bar"),
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new Browser("org.iron.srware", "url_bar"),
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new Browser("com.sec.android.app.sbrowser", "location_bar_edit_text"),
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new Browser("com.sec.android.app.sbrowser.beta", "location_bar_edit_text"),
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new Browser("com.yandex.browser", "bro_omnibar_address_title_text",
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(s) => s.Split(new char[]{' ', '<27>'}).FirstOrDefault()), // 0 = Regular Space, 1 = No-break space (00A0)
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new Browser("org.mozilla.firefox", "url_bar_title"),
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new Browser("org.mozilla.firefox_beta", "url_bar_title"),
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new Browser("org.mozilla.focus", "display_url"),
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new Browser("org.mozilla.klar", "display_url"),
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new Browser("com.ghostery.android.ghostery", "search_field"),
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new Browser("org.adblockplus.browser", "url_bar_title"),
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new Browser("com.htc.sense.browser", "title"),
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new Browser("com.amazon.cloud9", "url"),
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new Browser("mobi.mgeek.TunnyBrowser", "title"),
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new Browser("com.nubelacorp.javelin", "enterUrl"),
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new Browser("com.jerky.browser2", "enterUrl"),
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new Browser("com.mx.browser", "address_editor_with_progress"),
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new Browser("com.mx.browser.tablet", "address_editor_with_progress"),
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new Browser("com.linkbubble.playstore", "url_text"),
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new Browser("com.ksmobile.cb", "address_bar_edit_text"),
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new Browser("acr.browser.lightning", "search"),
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new Browser("acr.browser.barebones", "search"),
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new Browser("com.microsoft.emmx", "url_bar"),
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new Browser("com.duckduckgo.mobile.android", "omnibarTextInput"),
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new Browser("mark.via.gp", "aw"),
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new Browser("org.bromite.bromite", "url_bar"),
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new Browser("com.kiwibrowser.browser", "url_bar"),
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}.ToDictionary(n => n.PackageName);
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// Known packages to skip
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private static HashSet<string> FilteredPackageNames => new HashSet<string>
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{
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SystemUiPackage,
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"com.google.android.googlequicksearchbox",
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"com.google.android.apps.nexuslauncher",
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"com.google.android.launcher",
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"com.computer.desktop.ui.launcher",
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"com.launcher.notelauncher",
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"com.anddoes.launcher",
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"com.actionlauncher.playstore",
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"ch.deletescape.lawnchair.plah",
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"com.microsoft.launcher",
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"com.teslacoilsw.launcher",
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"com.teslacoilsw.launcher.prime",
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"is.shortcut",
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"me.craftsapp.nlauncher",
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"com.ss.squarehome2"
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};
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private readonly IAppSettingsService _appSettings;
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private long _lastNotificationTime = 0;
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private string _lastNotificationUri = null;
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private HashSet<string> _launcherPackageNames = null;
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private DateTime? _lastLauncherSetBuilt = null;
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private TimeSpan _rebuildLauncherSpan = TimeSpan.FromHours(1);
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public AutofillService()
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{
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_appSettings = Resolver.Resolve<IAppSettingsService>();
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}
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public override void OnAccessibilityEvent(AccessibilityEvent e)
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{
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var powerManager = (PowerManager)GetSystemService(PowerService);
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if(Build.VERSION.SdkInt > BuildVersionCodes.KitkatWatch && !powerManager.IsInteractive)
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{
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return;
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}
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else if(Build.VERSION.SdkInt < BuildVersionCodes.Lollipop && !powerManager.IsScreenOn)
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{
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return;
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}
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try
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{
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if(SkipPackage(e?.PackageName))
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{
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return;
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}
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var root = RootInActiveWindow;
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if(root == null || root.PackageName != e.PackageName)
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{
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return;
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}
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//var testNodes = GetWindowNodes(root, e, n => n.ViewIdResourceName != null && n.Text != null, false);
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//var testNodesData = testNodes.Select(n => new { id = n.ViewIdResourceName, text = n.Text });
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var notificationManager = (NotificationManager)GetSystemService(NotificationService);
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var cancelNotification = true;
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switch(e.EventType)
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{
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case EventTypes.ViewFocused:
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if(e.Source == null || !e.Source.Password || !_appSettings.AutofillPasswordField)
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{
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break;
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}
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if(e.PackageName == BitwardenPackage)
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{
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CancelNotification(notificationManager);
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break;
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}
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if(ScanAndAutofill(root, e, notificationManager, cancelNotification))
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{
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CancelNotification(notificationManager);
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}
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break;
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case EventTypes.WindowContentChanged:
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case EventTypes.WindowStateChanged:
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if(_appSettings.AutofillPasswordField && e.Source.Password)
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{
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break;
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}
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else if(_appSettings.AutofillPasswordField && AutofillActivity.LastCredentials == null)
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{
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if(string.IsNullOrWhiteSpace(_lastNotificationUri))
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{
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CancelNotification(notificationManager);
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break;
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}
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var uri = GetUri(root);
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if(uri != _lastNotificationUri)
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{
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CancelNotification(notificationManager);
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}
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else if(uri.StartsWith(App.Constants.AndroidAppProtocol))
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{
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CancelNotification(notificationManager, 30000);
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}
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break;
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}
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if(e.PackageName == BitwardenPackage)
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{
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CancelNotification(notificationManager);
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break;
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}
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if(_appSettings.AutofillPersistNotification)
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{
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var uri = GetUri(root);
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if(uri != null && !uri.Contains(BitwardenWebsite))
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{
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var needToFill = NeedToAutofill(AutofillActivity.LastCredentials, uri);
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if(needToFill)
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{
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var passwordNodes = GetWindowNodes(root, e, n => n.Password, false);
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needToFill = passwordNodes.Any();
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if(needToFill)
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{
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var allEditTexts = GetWindowNodes(root, e, n => EditText(n), false);
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var usernameEditText = allEditTexts.TakeWhile(n => !n.Password).LastOrDefault();
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FillCredentials(usernameEditText, passwordNodes);
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allEditTexts.Dispose();
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usernameEditText.Dispose();
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}
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passwordNodes.Dispose();
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}
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if(!needToFill)
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{
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NotifyToAutofill(uri, notificationManager);
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cancelNotification = false;
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}
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}
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AutofillActivity.LastCredentials = null;
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}
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else
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{
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cancelNotification = ScanAndAutofill(root, e, notificationManager, cancelNotification);
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}
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if(cancelNotification)
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{
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CancelNotification(notificationManager);
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}
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break;
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default:
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break;
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}
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notificationManager?.Dispose();
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root.Dispose();
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e.Dispose();
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}
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// Suppress exceptions so that service doesn't crash
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catch { }
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}
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public override void OnInterrupt()
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{
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}
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public bool ScanAndAutofill(AccessibilityNodeInfo root, AccessibilityEvent e,
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NotificationManager notificationManager, bool cancelNotification)
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{
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var passwordNodes = GetWindowNodes(root, e, n => n.Password, false);
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if(passwordNodes.Count > 0)
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{
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var uri = GetUri(root);
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if(uri != null && !uri.Contains(BitwardenWebsite))
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{
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if(NeedToAutofill(AutofillActivity.LastCredentials, uri))
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{
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var allEditTexts = GetWindowNodes(root, e, n => EditText(n), false);
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var usernameEditText = allEditTexts.TakeWhile(n => !n.Password).LastOrDefault();
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FillCredentials(usernameEditText, passwordNodes);
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allEditTexts.Dispose();
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usernameEditText.Dispose();
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}
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else
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{
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NotifyToAutofill(uri, notificationManager);
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cancelNotification = false;
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}
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}
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AutofillActivity.LastCredentials = null;
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}
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else if(AutofillActivity.LastCredentials != null)
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{
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System.Threading.Tasks.Task.Run(async () =>
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{
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await System.Threading.Tasks.Task.Delay(1000);
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AutofillActivity.LastCredentials = null;
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});
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}
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passwordNodes.Dispose();
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return cancelNotification;
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}
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public void CancelNotification(NotificationManager notificationManager, long limit = 250)
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{
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if(Java.Lang.JavaSystem.CurrentTimeMillis() - _lastNotificationTime < limit)
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{
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return;
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}
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_lastNotificationUri = null;
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notificationManager?.Cancel(AutoFillNotificationId);
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}
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private string GetUri(AccessibilityNodeInfo root)
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{
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var uri = string.Concat(App.Constants.AndroidAppProtocol, root.PackageName);
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if(SupportedBrowsers.ContainsKey(root.PackageName))
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{
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var addressNode = root.FindAccessibilityNodeInfosByViewId(
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$"{root.PackageName}:id/{SupportedBrowsers[root.PackageName].UriViewId}").FirstOrDefault();
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if(addressNode != null)
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{
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uri = ExtractUri(uri, addressNode, SupportedBrowsers[root.PackageName]);
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addressNode.Dispose();
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}
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}
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return uri;
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}
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private string ExtractUri(string uri, AccessibilityNodeInfo addressNode, Browser browser)
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{
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if(addressNode?.Text != null)
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{
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uri = browser.GetUriFunction(addressNode.Text).Trim();
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if(uri != null && uri.Contains("."))
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{
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if(!uri.Contains("://") && !uri.Contains(" "))
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{
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uri = string.Concat("http://", uri);
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}
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else if(Build.VERSION.SdkInt <= BuildVersionCodes.KitkatWatch)
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{
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var parts = uri.Split(new string[] { ". " }, StringSplitOptions.None);
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if(parts.Length > 1)
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{
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var urlPart = parts.FirstOrDefault(p => p.StartsWith("http"));
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if(urlPart != null)
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{
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uri = urlPart.Trim();
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}
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}
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}
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}
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}
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return uri;
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}
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/// <summary>
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/// Check to make sure it is ok to autofill still on the current screen
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/// </summary>
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private bool NeedToAutofill(AutofillCredentials creds, string currentUriString)
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{
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if(creds == null)
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{
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return false;
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}
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Uri lastUri, currentUri;
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if(Uri.TryCreate(creds.LastUri, UriKind.Absolute, out lastUri) &&
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Uri.TryCreate(currentUriString, UriKind.Absolute, out currentUri) &&
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lastUri.Host == currentUri.Host)
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{
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return true;
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}
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return false;
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}
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private static bool EditText(AccessibilityNodeInfo n)
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{
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return n?.ClassName?.Contains("EditText") ?? false;
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}
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private void NotifyToAutofill(string uri, NotificationManager notificationManager)
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{
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if(notificationManager == null || string.IsNullOrWhiteSpace(uri))
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{
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return;
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}
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var now = Java.Lang.JavaSystem.CurrentTimeMillis();
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var intent = new Intent(this, typeof(AutofillActivity));
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intent.PutExtra("uri", uri);
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intent.SetFlags(ActivityFlags.NewTask | ActivityFlags.SingleTop | ActivityFlags.ClearTop);
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var pendingIntent = PendingIntent.GetActivity(this, 0, intent, PendingIntentFlags.UpdateCurrent);
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var notificationContent = Build.VERSION.SdkInt > BuildVersionCodes.KitkatWatch ?
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AppResources.BitwardenAutofillServiceNotificationContent :
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AppResources.BitwardenAutofillServiceNotificationContentOld;
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var builder = new Notification.Builder(this);
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builder.SetSmallIcon(Resource.Drawable.notification_sm)
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.SetContentTitle(AppResources.BitwardenAutofillService)
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.SetContentText(notificationContent)
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.SetTicker(notificationContent)
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.SetWhen(now)
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.SetContentIntent(pendingIntent);
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if(Build.VERSION.SdkInt > BuildVersionCodes.KitkatWatch)
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{
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builder.SetVisibility(NotificationVisibility.Secret)
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.SetColor(global::Android.Support.V4.Content.ContextCompat.GetColor(ApplicationContext,
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Resource.Color.primary));
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}
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if(Build.VERSION.SdkInt >= BuildVersionCodes.O)
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{
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if(_notificationChannel == null)
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{
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_notificationChannel = new NotificationChannel("bitwarden_autofill_service",
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AppResources.AutofillService, NotificationImportance.Low);
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notificationManager.CreateNotificationChannel(_notificationChannel);
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}
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builder.SetChannelId(_notificationChannel.Id);
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}
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if(/*Build.VERSION.SdkInt <= BuildVersionCodes.N && */_appSettings.AutofillPersistNotification)
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{
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builder.SetPriority(-2);
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}
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_lastNotificationTime = now;
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_lastNotificationUri = uri;
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notificationManager.Notify(AutoFillNotificationId, builder.Build());
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builder.Dispose();
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}
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private void FillCredentials(AccessibilityNodeInfo usernameNode, IEnumerable<AccessibilityNodeInfo> passwordNodes)
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{
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FillEditText(usernameNode, AutofillActivity.LastCredentials?.Username);
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foreach(var n in passwordNodes)
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{
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FillEditText(n, AutofillActivity.LastCredentials?.Password);
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}
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}
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private static void FillEditText(AccessibilityNodeInfo editTextNode, string value)
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{
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if(editTextNode == null || value == null)
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{
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return;
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}
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var bundle = new Bundle();
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bundle.PutString(AccessibilityNodeInfo.ActionArgumentSetTextCharsequence, value);
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editTextNode.PerformAction(global::Android.Views.Accessibility.Action.SetText, bundle);
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}
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private NodeList GetWindowNodes(AccessibilityNodeInfo n, AccessibilityEvent e,
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Func<AccessibilityNodeInfo, bool> condition, bool disposeIfUnused, NodeList nodes = null,
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int recursionDepth = 0)
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{
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if(nodes == null)
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{
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nodes = new NodeList();
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}
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var dispose = disposeIfUnused;
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if(n != null && recursionDepth < 50)
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{
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if(n.WindowId == e.WindowId && !(n.ViewIdResourceName?.StartsWith(SystemUiPackage) ?? false) && condition(n))
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{
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dispose = false;
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nodes.Add(n);
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}
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for(var i = 0; i < n.ChildCount; i++)
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{
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var childNode = n.GetChild(i);
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if(i > 100)
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{
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global::Android.Util.Log.Info(BitwardenTag, "Too many child iterations.");
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break;
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}
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else if(childNode.GetHashCode() == n.GetHashCode())
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{
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global::Android.Util.Log.Info(BitwardenTag,
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"Child node is the same as parent for some reason.");
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}
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else
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{
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GetWindowNodes(childNode, e, condition, true, nodes, recursionDepth++);
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}
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}
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}
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if(dispose)
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{
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n?.Dispose();
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}
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return nodes;
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}
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private bool SkipPackage(string eventPackageName)
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{
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if(string.IsNullOrWhiteSpace(eventPackageName) || FilteredPackageNames.Contains(eventPackageName)
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|| eventPackageName.Contains("launcher"))
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{
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return true;
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}
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if(_launcherPackageNames == null || _lastLauncherSetBuilt == null ||
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(DateTime.Now - _lastLauncherSetBuilt.Value) > _rebuildLauncherSpan)
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{
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// refresh launcher list every now and then
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_lastLauncherSetBuilt = DateTime.Now;
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var intent = new Intent(Intent.ActionMain);
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intent.AddCategory(Intent.CategoryHome);
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var resolveInfo = PackageManager.QueryIntentActivities(intent, 0);
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_launcherPackageNames = resolveInfo.Select(ri => ri.ActivityInfo.PackageName).ToHashSet();
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}
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return _launcherPackageNames.Contains(eventPackageName);
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}
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public class Browser
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{
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public Browser(string packageName, string uriViewId)
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{
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PackageName = packageName;
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UriViewId = uriViewId;
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}
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public Browser(string packageName, string uriViewId, Func<string, string> getUriFunction)
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: this(packageName, uriViewId)
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{
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GetUriFunction = getUriFunction;
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}
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public string PackageName { get; set; }
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public string UriViewId { get; set; }
|
||
public Func<string, string> GetUriFunction { get; set; } = (s) => s;
|
||
}
|
||
|
||
public class NodeList : List<AccessibilityNodeInfo>, IDisposable
|
||
{
|
||
public void Dispose()
|
||
{
|
||
foreach(var item in this)
|
||
{
|
||
item.Dispose();
|
||
}
|
||
}
|
||
}
|
||
}
|
||
}
|