81 lines
2.4 KiB
C#
81 lines
2.4 KiB
C#
/*
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* Copyright (c) 2023 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 SafeExamBrowser.Core.Contracts.OperationModel;
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using SafeExamBrowser.Core.Contracts.OperationModel.Events;
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using SafeExamBrowser.I18n.Contracts;
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using SafeExamBrowser.Logging.Contracts;
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using SafeExamBrowser.SystemComponents.Contracts.Registry;
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namespace SafeExamBrowser.Runtime.Operations
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{
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internal class SessionIntegrityOperation : SessionOperation
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{
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private readonly ILogger logger;
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private readonly IRegistry registry;
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public override event ActionRequiredEventHandler ActionRequired { add { } remove { } }
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public override event StatusChangedEventHandler StatusChanged;
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public SessionIntegrityOperation(ILogger logger, IRegistry registry, SessionContext context) : base(context)
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{
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this.logger = logger;
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this.registry = registry;
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}
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public override OperationResult Perform()
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{
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StatusChanged?.Invoke(TextKey.OperationStatus_VerifySessionIntegrity);
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return VerifyEaseOfAccessConfiguration();
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}
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public override OperationResult Repeat()
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{
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StatusChanged?.Invoke(TextKey.OperationStatus_VerifySessionIntegrity);
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return VerifyEaseOfAccessConfiguration();
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}
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public override OperationResult Revert()
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{
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return OperationResult.Success;
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}
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private OperationResult VerifyEaseOfAccessConfiguration()
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{
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var result = OperationResult.Failed;
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logger.Info($"Attempting to verify ease of access configuration...");
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if (registry.TryRead(RegistryValue.MachineHive.EaseOfAccess_Key, RegistryValue.MachineHive.EaseOfAccess_Name, out var value))
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{
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if (value == default || (value is string s && string.IsNullOrWhiteSpace(s)))
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{
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result = OperationResult.Success;
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logger.Info("Ease of access configuration successfully verified.");
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}
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else if (!Context.Next.Settings.Service.IgnoreService)
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{
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result = OperationResult.Success;
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logger.Info($"Ease of access configuration is compromised ('{value}'), but service will be active in the next session.");
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}
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else
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{
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logger.Warn($"Ease of access configuration is compromised: '{value}'! Aborting session initialization...");
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}
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}
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else
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{
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logger.Error("Failed to verify ease of access configuration!");
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}
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return result;
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}
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}
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}
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