SEBWIN-474: Implemented workaround to always use kiosk mode Disable Explorer Shell when proctoring is active.

SafeExamBrowser.Runtime/CompositionRoot.cs

@@ -90,6 +90,7 @@ namespace SafeExamBrowser.Runtime
 			sessionOperations.Enqueue(new VirtualMachineOperation(vmDetector, logger, sessionContext));
 			sessionOperations.Enqueue(new ServiceOperation(logger, runtimeHost, serviceProxy, sessionContext, THIRTY_SECONDS, userInfo));
 			sessionOperations.Enqueue(new ClientTerminationOperation(logger, processFactory, proxyFactory, runtimeHost, sessionContext, THIRTY_SECONDS));
+			sessionOperations.Enqueue(new ProctoringWorkaroundOperation(logger, sessionContext));
 			sessionOperations.Enqueue(new KioskModeOperation(desktopFactory, explorerShell, logger, processFactory, sessionContext));
 			sessionOperations.Enqueue(new ClientOperation(logger, processFactory, proxyFactory, runtimeHost, sessionContext, THIRTY_SECONDS));
 			sessionOperations.Enqueue(new SessionActivationOperation(logger, sessionContext));

SafeExamBrowser.Runtime/Operations/ProctoringWorkaroundOperation.cs

@@ -0,0 +1,49 @@
+/*
+ * Copyright (c) 2021 ETH Zürich, Educational Development and Technology (LET)
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+using SafeExamBrowser.Core.Contracts.OperationModel;
+using SafeExamBrowser.Core.Contracts.OperationModel.Events;
+using SafeExamBrowser.Logging.Contracts;
+using SafeExamBrowser.Settings.Security;
+
+namespace SafeExamBrowser.Runtime.Operations
+{
+	internal class ProctoringWorkaroundOperation : SessionOperation
+	{
+		private readonly ILogger logger;
+
+		public override event ActionRequiredEventHandler ActionRequired { add { } remove { } }
+		public override event StatusChangedEventHandler StatusChanged { add { } remove { } }
+
+		public ProctoringWorkaroundOperation(ILogger logger, SessionContext context) : base(context)
+		{
+			this.logger = logger;
+		}
+
+		public override OperationResult Perform()
+		{
+			if (Context.Next.Settings.Proctoring.Enabled && Context.Next.Settings.Security.KioskMode == KioskMode.CreateNewDesktop)
+			{
+				Context.Next.Settings.Security.KioskMode = KioskMode.DisableExplorerShell;
+				logger.Info("Switched kiosk mode to Disable Explorer Shell due to remote proctoring being enabled.");
+			}
+
+			return OperationResult.Success;
+		}
+
+		public override OperationResult Repeat()
+		{
+			return Perform();
+		}
+
+		public override OperationResult Revert()
+		{
+			return OperationResult.Success;
+		}
+	}
+}

SafeExamBrowser.Runtime/SafeExamBrowser.Runtime.csproj

@@ -104,6 +104,7 @@
     <Compile Include="Operations\Events\ServerFailureEventArgs.cs" />
     <Compile Include="Operations\Events\UnexpectedErrorMessageArgs.cs" />
     <Compile Include="Operations\KioskModeOperation.cs" />
+    <Compile Include="Operations\ProctoringWorkaroundOperation.cs" />
     <Compile Include="Operations\RemoteSessionOperation.cs" />
     <Compile Include="Operations\ServerOperation.cs" />
     <Compile Include="Operations\ServiceOperation.cs" />