Clear autologon credentials on session log-on

otakulan · Jun 18, 2024 · 0d022fc · 0d022fc
1 parent 9a3c6c2
commit 0d022fc
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Showing 7 changed files with 43 additions and 4 deletions.
diff --git a/Lanpartyseating.Desktop.Abstractions/BaseMessage.cs b/Lanpartyseating.Desktop.Abstractions/BaseMessage.cs
@@ -4,6 +4,7 @@ namespace Lanpartyseating.Desktop.Abstractions;
 
 [JsonDerivedType(typeof(ReservationStateRequest), typeDiscriminator: "sessionstaterequest")]
 [JsonDerivedType(typeof(ReservationStateResponse), typeDiscriminator: "sessionstateresponse")]
+[JsonDerivedType(typeof(ClearAutoLogonRequest), typeDiscriminator: "clearautologonrequest")]
 [JsonDerivedType(typeof(TextMessage), typeDiscriminator: "textmessage")]
 public abstract class BaseMessage
 {

diff --git a/Lanpartyseating.Desktop.Abstractions/ClearAutoLogonRequest.cs b/Lanpartyseating.Desktop.Abstractions/ClearAutoLogonRequest.cs
@@ -0,0 +1,5 @@
+namespace Lanpartyseating.Desktop.Abstractions;
+
+public class ClearAutoLogonRequest : BaseMessage
+{
+}
diff --git a/Lanpartyseating.Desktop.Tray/ToastNotificationService.cs b/Lanpartyseating.Desktop.Tray/ToastNotificationService.cs
@@ -70,9 +70,12 @@ private void ShowInitialTaskDialog(string heading, string text)
     private async Task SendInitialMessageAsync(NamedPipeClientStream client, CancellationToken stoppingToken)
     {
         await using var writer = new StreamWriter(client, leaveOpen: true);
-        var request = new ReservationStateRequest();
-        var jsonRequest = JsonMessageSerializer.Serialize(request);
-        await writer.WriteLineAsync(jsonRequest);
+        var reservationStateRequest = new ReservationStateRequest();
+        var jsonReservationStateRequest = JsonMessageSerializer.Serialize(reservationStateRequest);
+        var clearAutoLogonRequest = new ClearAutoLogonRequest();
+        var jsonClearAutoLogonRequest = JsonMessageSerializer.Serialize(clearAutoLogonRequest);
+        await writer.WriteLineAsync(jsonReservationStateRequest);
+        await writer.WriteLineAsync(jsonClearAutoLogonRequest);
         await writer.FlushAsync(stoppingToken);
     }
 

diff --git a/Lanpartyseating.Desktop/Business/DummySessionManager.cs b/Lanpartyseating.Desktop/Business/DummySessionManager.cs
@@ -26,4 +26,9 @@ public void SignOut()
     {
         _logger.LogInformation("The client would have logged out an the current interactive session now");
     }
+
+    public void ClearAutoLogonCredentials()
+    {
+        _logger.LogInformation("The client would have cleared the autologon credentials now");
+    }
 }
diff --git a/Lanpartyseating.Desktop/Business/ISessionManager.cs b/Lanpartyseating.Desktop/Business/ISessionManager.cs
@@ -5,4 +5,5 @@ public interface ISessionManager
     public void SignInGamerAccount();
     public void SignInTournamentAccount();
     public void SignOut();
+    public void ClearAutoLogonCredentials();
 }
diff --git a/Lanpartyseating.Desktop/Business/NamedPipeServerHostedService.cs b/Lanpartyseating.Desktop/Business/NamedPipeServerHostedService.cs
@@ -15,13 +15,15 @@ public class NamedPipeServerHostedService : BackgroundService, INamedPipeServerS
 {
     private readonly ILogger<NamedPipeServerHostedService> _logger;
     private readonly ReservationManager _reservationManager;
+    private readonly ISessionManager _sessionManager;
     private const string PipeName = "Lanpartyseating.Desktop";
     private NamedPipeServerStream? _server;
 
-    public NamedPipeServerHostedService(ILogger<NamedPipeServerHostedService> logger, ReservationManager reservationManager)
+    public NamedPipeServerHostedService(ILogger<NamedPipeServerHostedService> logger, ReservationManager reservationManager, ISessionManager sessionManager)
     {
         _logger = logger;
         _reservationManager = reservationManager;
+        _sessionManager = sessionManager;
         _server = null;
     }
 
@@ -196,6 +198,14 @@ private async Task ProcessClientConnectionAsync(CancellationToken stoppingToken)
                         await writer.WriteLineAsync(JsonMessageSerializer.Serialize(response));
                         await writer.FlushAsync();
                     }
+                    else if (baseMessage is ClearAutoLogonRequest)
+                    {
+                        _sessionManager.ClearAutoLogonCredentials();
+                    }
+                    else
+                    {
+                        _logger.LogWarning("Received an unknown message type.");
+                    }
 
                     // Check for cancellation again after processing the message
                     stoppingToken.ThrowIfCancellationRequested();

diff --git a/Lanpartyseating.Desktop/Business/WindowsSessionManager.cs b/Lanpartyseating.Desktop/Business/WindowsSessionManager.cs
@@ -69,4 +69,18 @@ internal void LogoffInteractiveSession()
         var sessionId = WTSGetActiveConsoleSessionId();
         WTSLogoffSession(IntPtr.Zero, sessionId, false);
     }
+
+    public void ClearAutoLogonCredentials()
+    {
+        var winlogonRegPath = @"Software\Microsoft\Windows NT\CurrentVersion\Winlogon";
+
+        // Disable autologon
+        Registry.SetValue($@"HKEY_LOCAL_MACHINE\{winlogonRegPath}", "AutoAdminLogon", 0, RegistryValueKind.DWord);
+
+        // Clear autologon username
+        Registry.SetValue($@"HKEY_LOCAL_MACHINE\{winlogonRegPath}", "DefaultUserName", "", RegistryValueKind.String);
+
+        // Clear autologon password
+        Registry.SetValue($@"HKEY_LOCAL_MACHINE\{winlogonRegPath}", "DefaultPassword", "", RegistryValueKind.String);
+    }
 }