Restore SEBPatch

SafeExamBrowser.Configuration/ConfigurationData/DataProcessor.cs

@@ -0,0 +1,101 @@
+/*
+ * 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 System;
+using System.Collections.Generic;
+using System.IO;
+using System.Security.Cryptography;
+using SafeExamBrowser.Settings;
+using SafeExamBrowser.Settings.Applications;
+using SafeExamBrowser.Settings.Security;
+
+namespace SafeExamBrowser.Configuration.ConfigurationData
+{
+	internal class DataProcessor
+	{
+		internal void Process(IDictionary<string, object> rawData, AppSettings settings)
+		{
+			ProcessDefault(settings);
+			CalculateConfigurationKey(rawData, settings);
+		}
+
+		internal void ProcessDefault(AppSettings settings)
+		{
+			AllowBrowserToolbarForReloading(settings);
+			InitializeBrowserHomeFunctionality(settings);
+			InitializeClipboardSettings(settings);
+			InitializeProctoringSettings(settings);
+			RemoveLegacyBrowsers(settings);
+		}
+
+		private void AllowBrowserToolbarForReloading(AppSettings settings)
+		{
+			settings.Browser.AdditionalWindow.ShowToolbar = true;
+			settings.Browser.MainWindow.ShowToolbar = true;
+		}
+
+		private void CalculateConfigurationKey(IDictionary<string, object> rawData, AppSettings settings)
+		{
+			using (var algorithm = new SHA256Managed())
+			using (var stream = new MemoryStream())
+			using (var writer = new StreamWriter(stream))
+			{
+				Json.Serialize(rawData, writer);
+
+				writer.Flush();
+				stream.Seek(0, SeekOrigin.Begin);
+
+				var hash = algorithm.ComputeHash(stream);
+				var key = BitConverter.ToString(hash).ToLower().Replace("-", string.Empty);
+
+				settings.Browser.ConfigurationKey = key;
+			}
+		}
+
+		private void InitializeBrowserHomeFunctionality(AppSettings settings)
+		{
+			settings.Browser.MainWindow.ShowHomeButton = settings.Browser.UseStartUrlAsHomeUrl || !string.IsNullOrWhiteSpace(settings.Browser.HomeUrl);
+			settings.Browser.HomePasswordHash = "";
+		}
+
+		private void InitializeClipboardSettings(AppSettings settings)
+		{
+			settings.Browser.UseIsolatedClipboard = false;
+			settings.Keyboard.AllowCtrlC = true;
+			settings.Keyboard.AllowCtrlV = true;
+			settings.Keyboard.AllowCtrlX = true;
+		}
+
+		private void InitializeProctoringSettings(AppSettings settings)
+		{
+			settings.Proctoring.Enabled = settings.Proctoring.ScreenProctoring.Enabled;
+		}
+
+		private void RemoveLegacyBrowsers(AppSettings settings)
+		{
+			var legacyBrowsers = new List<WhitelistApplication>();
+
+			foreach (var application in settings.Applications.Whitelist)
+			{
+				var isEnginePath = application.ExecutablePath?.Contains("xulrunner") == true;
+				var isFirefox = application.ExecutableName?.Equals("firefox.exe", StringComparison.OrdinalIgnoreCase) == true;
+				var isXulRunner = application.ExecutableName?.Equals("xulrunner.exe", StringComparison.OrdinalIgnoreCase) == true;
+
+				if (isEnginePath && (isFirefox || isXulRunner))
+				{
+					legacyBrowsers.Add(application);
+				}
+			}
+
+			foreach (var legacyBrowser in legacyBrowsers)
+			{
+				settings.Applications.Whitelist.Remove(legacyBrowser);
+			}
+		}
+	}
+}