/* * Copyright (c) 2020 ETH Zürich, Educational Development and Technology (LET) * * 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.Logging.Contracts; using SafeExamBrowser.SystemComponents.Contracts; using System.Globalization; namespace SafeExamBrowser.SystemComponents { public class VirtualMachineDetector : IVirtualMachineDetector { private static readonly string[] PCI_VENDOR_BLACKLIST = { "vbox", "80ee", "qemu", "1af4", "1b36" }; //Virtualbox: VBOX, 80EE RedHat: QUEMU, 1AF4, 1B36 private ILogger logger; private ISystemInfo systemInfo; public VirtualMachineDetector(ILogger logger, ISystemInfo systemInfo) { this.logger = logger; this.systemInfo = systemInfo; } public bool IsVirtualMachine() { var isVirtualMachine = false; var manufacturer = systemInfo.Manufacturer.ToLower(); var model = systemInfo.Model.ToLower(); var macAddress = systemInfo.MacAddress; isVirtualMachine |= manufacturer.Contains("microsoft corporation") && !model.Contains("surface"); isVirtualMachine |= manufacturer.Contains("vmware"); isVirtualMachine |= manufacturer.Contains("parallels software"); isVirtualMachine |= model.Contains("virtualbox"); isVirtualMachine |= manufacturer.Contains("qemu"); isVirtualMachine |= ((byte.Parse(macAddress[1].ToString(), NumberStyles.HexNumber) & 2) == 2 || macAddress.StartsWith("080027")); /* using (var searcher = new ManagementObjectSearcher("root\\CIMV2", "SELECT DeviceID FROM Win32_PnPEntity")) foreach (ManagementObject queryObj in searcher.Get()) { isVirtualMachine |= pciVendorBlacklist.Any(System.Convert.ToString(queryObj.Properties.Cast().First().Value).ToLower().Contains); } */ logger.Debug($"Computer '{systemInfo.Name}' appears to {(isVirtualMachine ? "" : "not ")}be a virtual machine."); return isVirtualMachine; } } }