69 lines
2.1 KiB
C#
69 lines
2.1 KiB
C#
/*
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* Copyright (c) 2020 ETH Zürich, Educational Development and Technology (LET)
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*/
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using System;
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using System.Collections.Generic;
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using System.IO;
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using System.Security.Cryptography;
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using SafeExamBrowser.Settings;
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using SafeExamBrowser.Settings.Applications;
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namespace SafeExamBrowser.Configuration.ConfigurationData
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{
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internal class DataProcessor
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{
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internal void Process(IDictionary<string, object> rawData, AppSettings settings)
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{
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AllowReconfiguration(settings);
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CalculateConfigurationKey(rawData, settings);
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RemoveLegacyBrowser(settings);
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}
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private void AllowReconfiguration(AppSettings settings)
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{
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settings.Security.AllowReconfiguration = settings.ConfigurationMode == ConfigurationMode.ConfigureClient;
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}
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private void CalculateConfigurationKey(IDictionary<string, object> rawData, AppSettings settings)
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{
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using (var algorithm = new SHA256Managed())
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using (var stream = new MemoryStream())
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using (var writer = new StreamWriter(stream))
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{
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Json.Serialize(rawData, writer);
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writer.Flush();
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stream.Seek(0, SeekOrigin.Begin);
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var hash = algorithm.ComputeHash(stream);
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var key = BitConverter.ToString(hash).ToLower().Replace("-", string.Empty);
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settings.Browser.ConfigurationKey = key;
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}
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}
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private void RemoveLegacyBrowser(AppSettings settings)
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{
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var legacyBrowser = default(WhitelistApplication);
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foreach (var application in settings.Applications.Whitelist)
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{
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var isEnginePath = application.ExecutablePath?.Contains("xulrunner") == true;
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var isFirefox = application.ExecutableName?.Equals("firefox.exe", StringComparison.OrdinalIgnoreCase) == true;
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var isXulRunner = application.ExecutableName?.Equals("xulrunner.exe", StringComparison.OrdinalIgnoreCase) == true;
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if (isEnginePath && (isFirefox || isXulRunner))
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{
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legacyBrowser = application;
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}
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}
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settings.Applications.Whitelist.Remove(legacyBrowser);
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}
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}
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}
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