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Datensicherheit: Backup, Verschlüsselung, App-Sperre (Kapitel 13.3)

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Automatisches rollierendes Backup der Datenbank beim Start mit
Wiederherstellung über die Einstellungen, versionierte Schema-Migration,
optionale Passwort-Verschlüsselung der LiteDB-Datei und eine App-Sperre
nach Inaktivität mit eigenem Passwort.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
This commit is contained in:
admin
2026-08-13 13:07:36 +02:00
co-authored by Claude Sonnet 5
parent db1afff7e4
commit 48d07a2b99
25 changed files with 1228 additions and 21 deletions
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LehrerApp.Desktop/App.axaml.cs
+34 -8
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@@ -2,6 +2,7 @@ using Avalonia;
using Avalonia.Controls.ApplicationLifetimes;
using Avalonia.Markup.Xaml;
using LehrerApp.Core.Services;
using LehrerApp.Data;
using LehrerApp.Desktop.Services;
using LehrerApp.Desktop.ViewModels;
using LehrerApp.Desktop.ViewModels.Groups;
@@ -18,19 +19,44 @@ public class App : Application
public override void Initialize() => AvaloniaXamlLoader.Load(this);
public override void OnFrameworkInitializationCompleted()
{
if (ApplicationLifetime is IClassicDesktopStyleApplicationLifetime desktop)
{
// Verschlüsselte Datenbank (13.3.4): Passwort abfragen, bevor die Datenbank
// (und damit BuildServices, das sie öffnet) angefasst wird.
if (AppBootstrapper.IsDbEncrypted())
{
var promptVm = new DbPasswordPromptViewModel(
new DatabaseEncryptionService(), AppBootstrapper.ResolveDbPath());
var promptWindow = new DbPasswordPromptWindow { DataContext = promptVm };
promptVm.OnUnlocked = password =>
{
AppBootstrapper.DbPassword = password;
StartMainApp(desktop);
promptWindow.Close();
};
desktop.MainWindow = promptWindow;
}
else
{
StartMainApp(desktop);
}
}
base.OnFrameworkInitializationCompleted();
}
private static void StartMainApp(IClassicDesktopStyleApplicationLifetime desktop)
{
Services = AppBootstrapper.BuildServices();
Services.GetRequiredService<AppLogger>().Info("Anwendung gestartet.");
GlobalExceptionHandler.AttachNotifications(Services.GetRequiredService<NotificationService>());
if (ApplicationLifetime is IClassicDesktopStyleApplicationLifetime desktop)
{
var mainVm = Services.GetRequiredService<MainWindowViewModel>();
WireCallbacks(mainVm);
desktop.MainWindow = new MainWindow { DataContext = mainVm };
}
base.OnFrameworkInitializationCompleted();
var mainVm = Services.GetRequiredService<MainWindowViewModel>();
WireCallbacks(mainVm);
var main = new MainWindow { DataContext = mainVm };
desktop.MainWindow = main;
main.Show();
}
private static void WireCallbacks(MainWindowViewModel main)