152 lines
4.1 KiB
C#
152 lines
4.1 KiB
C#
/*
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This file is part of Keepass2Android, Copyright 2013 Philipp Crocoll. This file is based on Keepassdroid, Copyright Brian Pellin.
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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 Android.Content;
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using Android.OS;
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using Android.Preferences;
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using Android.Runtime;
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using Android.Views;
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using KeePassLib.Serialization;
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namespace keepass2android
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{
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/// <summary>
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/// Base class for activities displaying sensitive information.
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/// </summary>
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/// Checks in OnResume whether the timeout occured and the database must be locked/closed.
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public class LockCloseActivity : LockingActivity {
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//the check if the database was locked/closed can be disabled by the caller for activities
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//which may be used "outside" the database (e.g. GeneratePassword for creating a master password)
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protected const string NoLockCheck = "NO_LOCK_CHECK";
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protected IOConnectionInfo _ioc;
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private BroadcastReceiver _intentReceiver;
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private ActivityDesign _design;
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public LockCloseActivity()
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{
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_design = new ActivityDesign(this);
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}
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protected LockCloseActivity(IntPtr javaReference, JniHandleOwnership transfer)
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: base(javaReference, transfer)
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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 savedInstanceState)
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{
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_design.ApplyTheme();
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base.OnCreate(savedInstanceState);
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if (PreferenceManager.GetDefaultSharedPreferences(this).GetBoolean(
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GetString(Resource.String.ViewDatabaseSecure_key), true))
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{
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Window.SetFlags(WindowManagerFlags.Secure, WindowManagerFlags.Secure);
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}
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_ioc = App.Kp2a.GetDb().Ioc;
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if (Intent.GetBooleanExtra(NoLockCheck, false))
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return;
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_intentReceiver = new LockCloseActivityBroadcastReceiver(this);
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IntentFilter filter = new IntentFilter();
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filter.AddAction(Intents.DatabaseLocked);
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filter.AddAction(Intent.ActionScreenOff);
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RegisterReceiver(_intentReceiver, filter);
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}
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protected override void OnDestroy()
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{
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if (Intent.GetBooleanExtra(NoLockCheck, false) == false)
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{
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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 ex)
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{
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Kp2aLog.LogUnexpectedError(ex);
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}
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}
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base.OnDestroy();
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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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if (Intent.GetBooleanExtra(NoLockCheck, false))
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return;
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if (TimeoutHelper.CheckShutdown(this, _ioc))
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return;
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//todo: it seems like OnResume can be called after dismissing a dialog, e.g. the Delete-permanently-Dialog.
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//in this case the following check might run in parallel with the check performed during the SaveDb check (triggered after the
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//aforementioned dialog is closed) which can cause odd behavior. However, this is a rare case and hard to resolve so this is currently
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//accepted. (If the user clicks cancel on the reload-dialog, everything will work.)
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App.Kp2a.CheckForOpenFileChanged(this);
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}
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private void OnLockDatabase()
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{
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Kp2aLog.Log("Finishing " + ComponentName.ClassName + " due to database lock");
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SetResult(KeePass.ExitLock);
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Finish();
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}
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private class LockCloseActivityBroadcastReceiver : BroadcastReceiver
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{
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readonly LockCloseActivity _activity;
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public LockCloseActivityBroadcastReceiver(LockCloseActivity 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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case Intent.ActionScreenOff:
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App.Kp2a.OnScreenOff();
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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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