537 lines
16 KiB
C#
537 lines
16 KiB
C#
/*
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This file is part of Keepass2Android, Copyright 2013 Philipp Crocoll.
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Keepass2Android is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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Keepass2Android is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Keepass2Android. If not, see <http://www.gnu.org/licenses/>.
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*/
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using System;
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using System.Linq;
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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;
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using Android.Widget;
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using Android.Content.PM;
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using KeePassLib.Keys;
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using Android.Preferences;
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using Android.Provider;
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using Android.Runtime;
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using Android.Views.InputMethods;
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using Google.Android.Material.AppBar;
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using Google.Android.Material.Dialog;
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using keepass2android;
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using KeePassLib;
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using KeePassLib.Serialization;
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using Toolbar = AndroidX.AppCompat.Widget.Toolbar;
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using AndroidX.Core.Content;
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using keepass2android.Utils;
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namespace keepass2android
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{
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[Activity(Label = "@string/app_name",
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ConfigurationChanges = ConfigChanges.Orientation,
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WindowSoftInputMode = SoftInput.AdjustResize,
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MainLauncher = false,
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Theme = "@style/Kp2aTheme_BlueNoActionBar")]
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public class QuickUnlock : LifecycleAwareActivity, IBiometricAuthCallback
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{
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private IOConnectionInfo _ioc;
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private QuickUnlockBroadcastReceiver _intentReceiver;
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private ActivityDesign _design;
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private IBiometricIdentifier _biometryIdentifier;
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private int _quickUnlockLength;
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private int numFailedAttempts = 0;
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private int maxNumFailedAttempts = int.MaxValue;
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public QuickUnlock()
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{
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_design = new ActivityDesign(this);
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}
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protected override void OnCreate(Bundle bundle)
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{
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_design.ApplyTheme();
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base.OnCreate(bundle);
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//use FlagSecure to make sure the last (revealed) character of the password is not visible in recent apps
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Util.MakeSecureDisplay(this);
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_ioc = App.Kp2a.GetDbForQuickUnlock()?.Ioc;
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if (_ioc == null)
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{
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Finish();
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return;
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}
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SetContentView(Resource.Layout.QuickUnlock);
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var collapsingToolbar = FindViewById<CollapsingToolbarLayout>(Resource.Id.collapsing_toolbar);
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collapsingToolbar.SetTitle(GetString(Resource.String.QuickUnlock_prefs));
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SetSupportActionBar(FindViewById<Toolbar>(Resource.Id.toolbar));
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if (App.Kp2a.GetDbForQuickUnlock().KpDatabase.Name != "")
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{
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FindViewById(Resource.Id.filename_label).Visibility = ViewStates.Visible;
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((TextView) FindViewById(Resource.Id.filename_label)).Text = App.Kp2a.GetDbForQuickUnlock().KpDatabase.Name;
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}
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else
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{
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if (
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PreferenceManager.GetDefaultSharedPreferences(this)
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.GetBoolean(GetString(Resource.String.RememberRecentFiles_key),
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Resources.GetBoolean(Resource.Boolean.RememberRecentFiles_default)))
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{
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((TextView) FindViewById(Resource.Id.filename_label)).Text = App.Kp2a.GetFileStorage(_ioc).GetDisplayName(_ioc);
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}
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else
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{
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((TextView) FindViewById(Resource.Id.filename_label)).Text = "*****";
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}
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}
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TextView txtLabel = (TextView) FindViewById(Resource.Id.QuickUnlock_label);
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_quickUnlockLength = App.Kp2a.QuickUnlockKeyLength;
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bool useUnlockKeyFromDatabase =
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QuickUnlockFromDatabaseEnabled
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&& FindQuickUnlockEntry() != null;
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if (useUnlockKeyFromDatabase || PreferenceManager.GetDefaultSharedPreferences(this)
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.GetBoolean(GetString(Resource.String.QuickUnlockHideLength_key), false))
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{
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txtLabel.Text = GetString(Resource.String.QuickUnlock_label_secure);
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}
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else
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{
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txtLabel.Text = GetString(Resource.String.QuickUnlock_label, new Java.Lang.Object[] { _quickUnlockLength });
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}
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EditText pwd = (EditText) FindViewById(Resource.Id.QuickUnlock_password);
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pwd.SetEms(_quickUnlockLength);
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Util.MoveBottomBarButtons(Resource.Id.QuickUnlock_buttonLock, Resource.Id.QuickUnlock_button, Resource.Id.bottom_bar, this);
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Button btnUnlock = (Button) FindViewById(Resource.Id.QuickUnlock_button);
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btnUnlock.Click += (object sender, EventArgs e) =>
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{
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OnUnlock(pwd);
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};
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Button btnLock = (Button) FindViewById(Resource.Id.QuickUnlock_buttonLock);
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btnLock.Text = btnLock.Text.Replace("ß", "ss");
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btnLock.Click += (object sender, EventArgs e) =>
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{
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App.Kp2a.Lock(false);
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Finish();
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};
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pwd.EditorAction += (sender, args) =>
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{
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if ((args.ActionId == ImeAction.Done) || ((args.ActionId == ImeAction.ImeNull) && (args.Event.Action == KeyEventActions.Down)))
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OnUnlock(pwd);
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};
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_intentReceiver = new QuickUnlockBroadcastReceiver(this);
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IntentFilter filter = new IntentFilter();
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filter.AddAction(Intents.DatabaseLocked);
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ContextCompat.RegisterReceiver(this, _intentReceiver, filter, (int)ReceiverFlags.Exported);
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Util.SetNoPersonalizedLearning(FindViewById<EditText>(Resource.Id.QuickUnlock_password));
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if (bundle != null)
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numFailedAttempts = bundle.GetInt(NumFailedAttemptsKey, 0);
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FindViewById(Resource.Id.QuickUnlock_buttonEnableLock).Click += (object sender, EventArgs e) =>
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{
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Intent intent = new Intent(Settings.ActionSecuritySettings);
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StartActivity(intent);
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};
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FindViewById(Resource.Id.QuickUnlock_buttonCloseDb).Click += (object sender, EventArgs e) =>
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{
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App.Kp2a.Lock(false);
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};
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if (App.Kp2a.ScreenLockWasEnabledWhenOpeningDatabase == false)
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{
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FindViewById(Resource.Id.QuickUnlockForm).Visibility = ViewStates.Gone;
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FindViewById(Resource.Id.QuickUnlockBlocked).Visibility = ViewStates.Visible;
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}
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else
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{
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FindViewById(Resource.Id.QuickUnlockForm).Visibility = ViewStates.Visible;
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FindViewById(Resource.Id.QuickUnlockBlocked).Visibility = ViewStates.Gone;
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}
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}
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private bool QuickUnlockFromDatabaseEnabled =>
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PreferenceManager.GetDefaultSharedPreferences(this)
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.GetBoolean(GetString(Resource.String.QuickUnlockKeyFromDatabase_key), false);
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private static PwEntry FindQuickUnlockEntry()
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{
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return App.Kp2a.GetDbForQuickUnlock()?.KpDatabase?.RootGroup?.Entries.SingleOrDefault(e => e.Strings.GetSafe(PwDefs.TitleField).ReadString() == "QuickUnlock");
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}
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private const string NumFailedAttemptsKey = "FailedAttempts";
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protected override void OnSaveInstanceState(Bundle outState)
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{
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base.OnSaveInstanceState(outState);
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outState.PutInt(NumFailedAttemptsKey, numFailedAttempts);
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}
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protected override void OnStart()
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{
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base.OnStart();
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DonateReminder.ShowDonateReminderIfAppropriate(this);
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}
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public void OnBiometricError(string message)
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{
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Kp2aLog.Log("fingerprint error: " + message);
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var btn = FindViewById<ImageButton>(Resource.Id.fingerprintbtn);
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btn.SetImageResource(Resource.Drawable.ic_fingerprint_error);
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btn.PostDelayed(() =>
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{
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btn.SetImageResource(Resource.Drawable.baseline_fingerprint_24);
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}, 1300);
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App.Kp2a.ShowMessage(this, message, MessageSeverity.Error);
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}
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public void OnBiometricAttemptFailed(string message)
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{
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numFailedAttempts++;
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if (numFailedAttempts >= maxNumFailedAttempts)
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{
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FindViewById<ImageButton>(Resource.Id.fingerprintbtn).Visibility = ViewStates.Gone;
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_biometryIdentifier.StopListening();
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}
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}
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public void OnBiometricAuthSucceeded()
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{
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Kp2aLog.Log("OnFingerprintAuthSucceeded");
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_biometryIdentifier.StopListening();
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var btn = FindViewById<ImageButton>(Resource.Id.fingerprintbtn);
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btn.SetImageResource(Resource.Drawable.ic_fingerprint_success);
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EditText pwd = (EditText)FindViewById(Resource.Id.QuickUnlock_password);
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pwd.Text = ExpectedPasswordPart;
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btn.PostDelayed(() =>
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{
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UnlockAndSyncAndClose();
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}, 500);
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}
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private bool InitFingerprintUnlock()
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{
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Kp2aLog.Log("InitFingerprintUnlock");
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if (_biometryIdentifier != null)
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{
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Kp2aLog.Log("Already listening for fingerprint!");
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return true;
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}
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var btn = FindViewById<ImageButton>(Resource.Id.fingerprintbtn);
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try
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{
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FingerprintUnlockMode um;
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Enum.TryParse(PreferenceManager.GetDefaultSharedPreferences(this).GetString(App.Kp2a.GetDbForQuickUnlock().CurrentFingerprintModePrefKey, ""), out um);
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btn.Visibility = (um != FingerprintUnlockMode.Disabled) ? ViewStates.Visible : ViewStates.Gone;
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if (um == FingerprintUnlockMode.Disabled)
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{
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_biometryIdentifier = null;
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return false;
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}
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if (um == FingerprintUnlockMode.QuickUnlock && Util.GetCloseDatabaseAfterFailedBiometricQuickUnlock(this))
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{
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maxNumFailedAttempts = 3;
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}
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BiometricModule fpModule = new BiometricModule(this);
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Kp2aLog.Log("fpModule.IsHardwareAvailable=" + fpModule.IsHardwareAvailable);
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if (fpModule.IsHardwareAvailable) //see FingerprintSetupActivity
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_biometryIdentifier = new BiometricDecryption(fpModule, App.Kp2a.GetDbForQuickUnlock().CurrentFingerprintPrefKey, this,
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App.Kp2a.GetDbForQuickUnlock().CurrentFingerprintPrefKey);
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if (_biometryIdentifier == null)
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{
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FindViewById<ImageButton>(Resource.Id.fingerprintbtn).Visibility = ViewStates.Gone;
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return false;
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}
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if (_biometryIdentifier.Init())
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{
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Kp2aLog.Log("successfully initialized fingerprint.");
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btn.SetImageResource(Resource.Drawable.baseline_fingerprint_24);
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_biometryIdentifier.StartListening(this);
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return true;
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}
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else
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{
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Kp2aLog.Log("failed to initialize fingerprint.");
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HandleFingerprintKeyInvalidated();
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}
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}
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catch (Exception e)
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{
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Kp2aLog.Log("Error initializing Fingerprint Unlock: " + e);
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btn.SetImageResource(Resource.Drawable.ic_fingerprint_error);
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btn.Tag = "Error initializing Fingerprint Unlock: " + e;
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_biometryIdentifier = null;
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}
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return false;
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}
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private void HandleFingerprintKeyInvalidated()
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{
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var btn = FindViewById<ImageButton>(Resource.Id.fingerprintbtn);
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//key invalidated permanently
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btn.SetImageResource(Resource.Drawable.ic_fingerprint_error);
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btn.Tag = GetString(Resource.String.fingerprint_unlock_failed) + " " + GetString(Resource.String.fingerprint_reenable2);
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_biometryIdentifier = null;
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}
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private void OnUnlock(EditText pwd)
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{
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var expectedPasswordPart = ExpectedPasswordPart;
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if (pwd.Text == expectedPasswordPart)
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{
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UnlockAndSyncAndClose();
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}
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else
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{
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Kp2aLog.Log("QuickUnlock not successful!");
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App.Kp2a.Lock(false);
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App.Kp2a.ShowMessage(this, GetString(Resource.String.QuickUnlock_fail), MessageSeverity.Error);
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Finish();
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}
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}
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private void UnlockAndSyncAndClose()
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{
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App.Kp2a.UnlockDatabase();
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if (PreferenceManager.GetDefaultSharedPreferences(this)
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.GetBoolean(GetString(Resource.String.SyncAfterQuickUnlock_key), false))
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{
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new SyncUtil(this).SynchronizeDatabase(Finish);
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}
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else
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Finish();
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}
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private string ExpectedPasswordPart
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{
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get
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{
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if (QuickUnlockFromDatabaseEnabled)
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{
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var quickUnlockEntry = FindQuickUnlockEntry();
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if (quickUnlockEntry != null)
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{
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return quickUnlockEntry.Strings.ReadSafe(PwDefs.PasswordField).ToString();
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}
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}
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KcpPassword kcpPassword = (KcpPassword) App.Kp2a.GetDbForQuickUnlock().KpDatabase.MasterKey.GetUserKey(typeof (KcpPassword));
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String password = kcpPassword.Password.ReadString();
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var passwordStringInfo = new System.Globalization.StringInfo(password);
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int passwordLength = passwordStringInfo.LengthInTextElements;
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String expectedPasswordPart = passwordStringInfo.SubstringByTextElements(Math.Max(0, passwordLength - _quickUnlockLength),
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Math.Min(passwordLength, _quickUnlockLength));
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return expectedPasswordPart;
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}
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}
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private void OnLockDatabase()
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{
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CheckIfUnloaded();
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}
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protected override void OnResume()
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{
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base.OnResume();
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_design.ReapplyTheme();
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App.Kp2a.MessagePresenter = new ChainedSnackbarPresenter(FindViewById(Resource.Id.main_content));
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CheckIfUnloaded();
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InitFingerprintUnlock();
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bool showKeyboard = true;
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EditText pwd = (EditText)FindViewById(Resource.Id.QuickUnlock_password);
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pwd.PostDelayed(() =>
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{
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pwd.RequestFocus();
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InputMethodManager keyboard = (InputMethodManager)GetSystemService(Context.InputMethodService);
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if (showKeyboard)
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keyboard.ShowSoftInput(pwd, ShowFlags.Implicit);
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else
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keyboard.HideSoftInputFromWindow(pwd.WindowToken, HideSoftInputFlags.ImplicitOnly);
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}, 50);
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var btn = FindViewById<ImageButton>(Resource.Id.fingerprintbtn);
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btn.Click += (sender, args) =>
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{
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if ((_biometryIdentifier != null) && ((_biometryIdentifier.HasUserInterface)|| string.IsNullOrEmpty((string)btn.Tag) ))
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{
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_biometryIdentifier.StartListening(this);
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}
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else
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{
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MaterialAlertDialogBuilder b = new MaterialAlertDialogBuilder(this);
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b.SetTitle(Resource.String.fingerprint_prefs);
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b.SetMessage(btn.Tag.ToString());
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b.SetPositiveButton(Android.Resource.String.Ok, (o, eventArgs) => ((Dialog)o).Dismiss());
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if (_biometryIdentifier != null)
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{
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b.SetNegativeButton(Resource.String.disable_sensor, (senderAlert, alertArgs) =>
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{
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btn.SetImageResource(Resource.Drawable.ic_fingerprint_error);
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_biometryIdentifier?.StopListening();
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_biometryIdentifier = null;
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});
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}
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else
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{
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b.SetNegativeButton(Resource.String.enable_sensor, (senderAlert, alertArgs) =>
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{
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InitFingerprintUnlock();
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});
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}
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b.Show();
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}
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};
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}
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protected override void OnPause()
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{
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App.Kp2a.MessagePresenter = new NonePresenter();
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if (_biometryIdentifier != null)
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{
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Kp2aLog.Log("FP: Stop listening");
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_biometryIdentifier.StopListening();
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}
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base.OnPause();
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}
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protected override void OnDestroy()
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{
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base.OnDestroy();
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try
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{
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UnregisterReceiver(_intentReceiver);
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}
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catch (Exception e)
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{
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Kp2aLog.LogUnexpectedError(e);
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}
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}
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private void CheckIfUnloaded()
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{
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if (App.Kp2a.OpenDatabases.Any() == false)
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{
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Finish();
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}
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}
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public override void OnBackPressed()
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{
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SetResult(KeePass.ExitClose);
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base.OnBackPressed();
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}
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private class QuickUnlockBroadcastReceiver : BroadcastReceiver
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{
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readonly QuickUnlock _activity;
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public QuickUnlockBroadcastReceiver(QuickUnlock activity)
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{
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_activity = activity;
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}
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public override void OnReceive(Context context, Intent intent)
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{
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switch (intent.Action)
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{
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case Intents.DatabaseLocked:
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_activity.OnLockDatabase();
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break;
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}
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}
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}
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}
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}
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