Restore SEBPatch

SafeExamBrowser.Runtime/Operations/RemoteSessionOperation.cs

@@ -0,0 +1,71 @@
+/*
+ * Copyright (c) 2024 ETH Zürich, IT Services
+ * 
+ * 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.I18n.Contracts;
+using SafeExamBrowser.Logging.Contracts;
+using SafeExamBrowser.Monitoring.Contracts;
+using SafeExamBrowser.Runtime.Operations.Events;
+using SafeExamBrowser.UserInterface.Contracts.MessageBox;
+
+namespace SafeExamBrowser.Runtime.Operations
+{
+	internal class RemoteSessionOperation : SessionOperation
+	{
+		private readonly IRemoteSessionDetector detector;
+		private readonly ILogger logger;
+
+		public override event ActionRequiredEventHandler ActionRequired;
+		public override event StatusChangedEventHandler StatusChanged;
+
+		public RemoteSessionOperation(IRemoteSessionDetector detector, ILogger logger, SessionContext context) : base(context)
+		{
+			this.detector = detector;
+			this.logger = logger;
+		}
+
+		public override OperationResult Perform()
+		{
+			return ValidatePolicy();
+		}
+
+		public override OperationResult Repeat()
+		{
+			return ValidatePolicy();
+		}
+
+		public override OperationResult Revert()
+		{
+			return OperationResult.Success;
+		}
+
+		private OperationResult ValidatePolicy()
+		{
+			logger.Info($"Validating remote session policy...");
+			StatusChanged?.Invoke(TextKey.OperationStatus_ValidateRemoteSessionPolicy);
+
+			if (Context.Next.Settings.Service.DisableRemoteConnections && detector.IsRemoteSession())
+			{
+				var args = new MessageEventArgs
+				{
+					Icon = MessageBoxIcon.Error,
+					Message = TextKey.MessageBox_RemoteSessionNotAllowed,
+					Title = TextKey.MessageBox_RemoteSessionNotAllowedTitle
+				};
+
+				logger.Error("Detected remote session while SEB is not allowed to be run in a remote session! Aborting...");
+				ActionRequired?.Invoke(args);
+
+				return OperationResult.Aborted;
+			}
+
+			return OperationResult.Success;
+		}
+	}
+}