251 lines
12 KiB
C#
251 lines
12 KiB
C#
/*
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* Copyright (c) 2025 ETH Zürich, IT Services
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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 SafeExamBrowser.Communication.Contracts;
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using SafeExamBrowser.Communication.Contracts.Hosts;
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using SafeExamBrowser.Communication.Contracts.Proxies;
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using SafeExamBrowser.Communication.Hosts;
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using SafeExamBrowser.Communication.Proxies;
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using SafeExamBrowser.Configuration;
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using SafeExamBrowser.Configuration.Contracts;
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using SafeExamBrowser.Configuration.Contracts.Integrity;
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using SafeExamBrowser.Configuration.Cryptography;
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using SafeExamBrowser.Configuration.DataCompression;
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using SafeExamBrowser.Configuration.DataFormats;
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using SafeExamBrowser.Configuration.DataResources;
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using SafeExamBrowser.Configuration.Integrity;
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using SafeExamBrowser.Core.Contracts.OperationModel;
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using SafeExamBrowser.Core.Operations;
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using SafeExamBrowser.Core.ResponsibilityModel;
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using SafeExamBrowser.I18n;
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using SafeExamBrowser.I18n.Contracts;
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using SafeExamBrowser.Logging;
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using SafeExamBrowser.Logging.Contracts;
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using SafeExamBrowser.Monitoring;
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using SafeExamBrowser.Monitoring.Display;
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using SafeExamBrowser.Monitoring.System;
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using SafeExamBrowser.Runtime.Communication;
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using SafeExamBrowser.Runtime.Operations.Bootstrap;
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using SafeExamBrowser.Runtime.Operations.Session;
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using SafeExamBrowser.Runtime.Responsibilities;
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using SafeExamBrowser.Server;
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using SafeExamBrowser.Settings.Logging;
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using SafeExamBrowser.SystemComponents;
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using SafeExamBrowser.SystemComponents.Contracts;
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using SafeExamBrowser.SystemComponents.Contracts.Registry;
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using SafeExamBrowser.SystemComponents.Registry;
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using SafeExamBrowser.UserInterface.Contracts;
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using SafeExamBrowser.UserInterface.Contracts.MessageBox;
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using SafeExamBrowser.UserInterface.Contracts.Windows;
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using SafeExamBrowser.UserInterface.Desktop;
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using SafeExamBrowser.WindowsApi;
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using SafeExamBrowser.WindowsApi.Desktops;
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using SafeExamBrowser.WindowsApi.Processes;
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namespace SafeExamBrowser.Runtime
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{
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internal class CompositionRoot
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{
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private const int FIVE_SECONDS = 5000;
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private const int THIRTY_SECONDS = 30000;
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private AppConfig appConfig;
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private IConfigurationRepository repository;
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private ILogger logger;
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private ISystemInfo systemInfo;
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private IText text;
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internal RuntimeController RuntimeController { get; private set; }
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internal void BuildObjectGraph(Action shutdown)
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{
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logger = new Logger();
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InitializeConfiguration();
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InitializeLogging();
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InitializeText();
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var uiFactory = new UserInterfaceFactory(text);
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var context = new RuntimeContext();
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var integrityModule = new IntegrityModule(appConfig, ModuleLogger(nameof(IntegrityModule)));
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var messageBox = new MessageBoxFactory(text);
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var registry = new Registry(ModuleLogger(nameof(Registry)));
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var runtimeHost = new RuntimeHost(appConfig.RuntimeAddress, new HostObjectFactory(), ModuleLogger(nameof(RuntimeHost)), FIVE_SECONDS);
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var runtimeWindow = uiFactory.CreateRuntimeWindow(appConfig);
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var serviceProxy = new ServiceProxy(appConfig.ServiceAddress, new ProxyObjectFactory(), ModuleLogger(nameof(ServiceProxy)), Interlocutor.Runtime);
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var splashScreen = uiFactory.CreateSplashScreen(appConfig);
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systemInfo = new SystemInfo(registry);
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var bootstrapSequence = BuildBootstrapOperations(integrityModule, runtimeHost, splashScreen);
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var sessionSequence = BuildSessionOperations(integrityModule, messageBox, registry, runtimeHost, runtimeWindow, serviceProxy, context, uiFactory);
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var responsibilities = BuildResponsibilities(messageBox, runtimeHost, runtimeWindow, serviceProxy, context, sessionSequence, shutdown, splashScreen);
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context.Responsibilities = responsibilities;
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RuntimeController = new RuntimeController(logger, bootstrapSequence, responsibilities, context, runtimeWindow, splashScreen);
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}
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private BootstrapOperationSequence BuildBootstrapOperations(IIntegrityModule integrityModule, IRuntimeHost runtimeHost, ISplashScreen splashScreen)
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{
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var operations = new Queue<IOperation>();
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operations.Enqueue(new I18nOperation(logger, text));
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operations.Enqueue(new CommunicationHostOperation(runtimeHost, logger));
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operations.Enqueue(new ApplicationIntegrityOperation(integrityModule, logger));
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return new BootstrapOperationSequence(logger, operations, splashScreen);
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}
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private ResponsibilityCollection<RuntimeTask> BuildResponsibilities(
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IMessageBox messageBox,
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IRuntimeHost runtimeHost,
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IRuntimeWindow runtimeWindow,
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IServiceProxy serviceProxy,
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RuntimeContext runtimeContext,
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SessionOperationSequence sessionSequence,
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Action shutdown,
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ISplashScreen splashScreen)
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{
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var responsibilities = new Queue<RuntimeResponsibility>();
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responsibilities.Enqueue(new ClientResponsibility(ModuleLogger(nameof(ClientResponsibility)), messageBox, runtimeContext, runtimeWindow, shutdown));
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responsibilities.Enqueue(new CommunicationResponsibility(ModuleLogger(nameof(CommunicationResponsibility)), runtimeContext, runtimeHost, shutdown));
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responsibilities.Enqueue(new ErrorMessageResponsibility(appConfig, ModuleLogger(nameof(ErrorMessageResponsibility)), messageBox, runtimeContext, splashScreen, text));
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responsibilities.Enqueue(new ServiceResponsibility(ModuleLogger(nameof(ServiceResponsibility)), messageBox, runtimeContext, runtimeWindow, serviceProxy, shutdown));
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responsibilities.Enqueue(new SessionResponsibility(appConfig, ModuleLogger(nameof(SessionResponsibility)), messageBox, runtimeContext, runtimeWindow, sessionSequence, shutdown, text));
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return new ResponsibilityCollection<RuntimeTask>(logger, responsibilities);
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}
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private SessionOperationSequence BuildSessionOperations(
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IIntegrityModule integrityModule,
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IMessageBox messageBox,
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IRegistry registry,
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IRuntimeHost runtimeHost,
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IRuntimeWindow runtimeWindow,
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IServiceProxy serviceProxy,
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RuntimeContext runtimeContext,
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IUserInterfaceFactory uiFactory)
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{
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var args = Environment.GetCommandLineArgs();
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var fileSystem = new FileSystem();
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var nativeMethods = new NativeMethods();
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var operations = new Queue<SessionOperation>();
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var userInfo = new UserInfo(ModuleLogger(nameof(UserInfo)));
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var clientBridge = new ClientBridge(runtimeHost, runtimeContext);
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var dependencies = new Dependencies(clientBridge, logger, messageBox, runtimeWindow, runtimeContext, text);
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var desktopFactory = new DesktopFactory(ModuleLogger(nameof(DesktopFactory)));
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var desktopMonitor = new DesktopMonitor(ModuleLogger(nameof(DesktopMonitor)));
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var displayMonitor = new DisplayMonitor(ModuleLogger(nameof(DisplayMonitor)), nativeMethods, systemInfo);
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var explorerShell = new ExplorerShell(ModuleLogger(nameof(ExplorerShell)), nativeMethods);
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var keyGenerator = new KeyGenerator(appConfig, integrityModule, ModuleLogger(nameof(KeyGenerator)));
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var processFactory = new ProcessFactory(ModuleLogger(nameof(ProcessFactory)));
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var proxyFactory = new ProxyFactory(new ProxyObjectFactory(), ModuleLogger(nameof(ProxyFactory)));
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var remoteSessionDetector = new RemoteSessionDetector(ModuleLogger(nameof(RemoteSessionDetector)));
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var sentinel = new SystemSentinel(ModuleLogger(nameof(SystemSentinel)), nativeMethods, registry);
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var server = new ServerProxy(appConfig, keyGenerator, ModuleLogger(nameof(ServerProxy)), systemInfo, userInfo);
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var virtualMachineDetector = new VirtualMachineDetector(ModuleLogger(nameof(VirtualMachineDetector)), registry, systemInfo);
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operations.Enqueue(new SessionInitializationOperation(dependencies, fileSystem, repository));
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operations.Enqueue(new ConfigurationOperation(args, dependencies, new FileSystem(), new HashAlgorithm(), repository, uiFactory));
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operations.Enqueue(new ServerOperation(dependencies, fileSystem, repository, server, uiFactory));
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operations.Enqueue(new VersionRestrictionOperation(dependencies));
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operations.Enqueue(new DisclaimerOperation(dependencies));
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operations.Enqueue(new RemoteSessionOperation(dependencies, remoteSessionDetector));
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operations.Enqueue(new SessionIntegrityOperation(dependencies, sentinel));
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operations.Enqueue(new VirtualMachineOperation(dependencies, virtualMachineDetector));
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operations.Enqueue(new DisplayMonitorOperation(dependencies, displayMonitor));
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operations.Enqueue(new ServiceOperation(dependencies, runtimeHost, serviceProxy, THIRTY_SECONDS, userInfo));
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operations.Enqueue(new ClientTerminationOperation(dependencies, processFactory, proxyFactory, runtimeHost, THIRTY_SECONDS));
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operations.Enqueue(new KioskModeOperation(dependencies, desktopFactory, desktopMonitor, explorerShell, processFactory));
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operations.Enqueue(new ClientOperation(dependencies, processFactory, proxyFactory, runtimeHost, THIRTY_SECONDS));
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operations.Enqueue(new SessionActivationOperation(dependencies));
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return new SessionOperationSequence(logger, operations, runtimeWindow);
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}
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internal void LogStartupInformation()
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{
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logger.Log($"/* {appConfig.ProgramTitle}, Version {appConfig.ProgramInformationalVersion}, Build {appConfig.ProgramBuildVersion}");
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logger.Log($"/* {appConfig.ProgramCopyright}");
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logger.Log($"/* ");
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logger.Log($"/* Please visit https://www.github.com/SafeExamBrowser for more information.");
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logger.Log(string.Empty);
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logger.Log($"# Application started at {appConfig.ApplicationStartTime:yyyy-MM-dd HH:mm:ss.fff}");
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logger.Log($"# Running on {systemInfo.OperatingSystemInfo}");
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logger.Log($"# Computer '{systemInfo.Name}' is a {systemInfo.Model} manufactured by {systemInfo.Manufacturer}");
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logger.Log($"# Runtime-ID: {appConfig.RuntimeId}");
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logger.Log(string.Empty);
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}
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internal void LogShutdownInformation()
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{
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logger?.Log($"# Application terminated at {DateTime.Now:yyyy-MM-dd HH:mm:ss.fff}");
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}
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private void InitializeConfiguration()
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{
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var certificateStore = new CertificateStore(ModuleLogger(nameof(CertificateStore)));
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var compressor = new GZipCompressor(ModuleLogger(nameof(GZipCompressor)));
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var passwordEncryption = new PasswordEncryption(ModuleLogger(nameof(PasswordEncryption)));
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var publicKeyEncryption = new PublicKeyEncryption(certificateStore, ModuleLogger(nameof(PublicKeyEncryption)));
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var symmetricEncryption = new PublicKeySymmetricEncryption(certificateStore, ModuleLogger(nameof(PublicKeySymmetricEncryption)), passwordEncryption);
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var repositoryLogger = ModuleLogger(nameof(ConfigurationRepository));
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var xmlParser = new XmlParser(compressor, ModuleLogger(nameof(XmlParser)));
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var xmlSerializer = new XmlSerializer(ModuleLogger(nameof(XmlSerializer)));
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repository = new ConfigurationRepository(certificateStore, repositoryLogger);
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appConfig = repository.InitializeAppConfig();
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repository.Register(new BinaryParser(
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compressor,
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new HashAlgorithm(),
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ModuleLogger(nameof(BinaryParser)),
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passwordEncryption,
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publicKeyEncryption,
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symmetricEncryption, xmlParser));
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repository.Register(new BinarySerializer(
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compressor,
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ModuleLogger(nameof(BinarySerializer)),
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passwordEncryption,
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publicKeyEncryption,
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symmetricEncryption,
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xmlSerializer));
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repository.Register(new XmlParser(compressor, ModuleLogger(nameof(XmlParser))));
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repository.Register(new XmlSerializer(ModuleLogger(nameof(XmlSerializer))));
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repository.Register(new FileResourceLoader(ModuleLogger(nameof(FileResourceLoader))));
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repository.Register(new FileResourceSaver(ModuleLogger(nameof(FileResourceSaver))));
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repository.Register(new NetworkResourceLoader(appConfig, new ModuleLogger(logger, nameof(NetworkResourceLoader))));
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}
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private void InitializeLogging()
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{
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var logFileWriter = new LogFileWriter(new DefaultLogFormatter(), appConfig.RuntimeLogFilePath);
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logFileWriter.Initialize();
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logger.LogLevel = LogLevel.Debug;
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logger.Subscribe(logFileWriter);
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}
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private void InitializeText()
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{
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text = new Text(ModuleLogger(nameof(Text)));
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}
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private IModuleLogger ModuleLogger(string moduleInfo)
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{
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return new ModuleLogger(logger, moduleInfo);
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}
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}
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}
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