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Virtualized MAC and PCI vendor detection

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Diego Araujo Novoa 2020-05-05 14:44:22 +02:00 committed by GitHub
parent 16f2e22f2a
commit aa65b8b2d1
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1 changed files with 12 additions and 1 deletions
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13
SafeExamBrowser.SystemComponents/VirtualMachineDetector.cs
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@ -15,7 +15,7 @@ namespace SafeExamBrowser.SystemComponents
{ {
private ILogger logger; private ILogger logger;
private ISystemInfo systemInfo; private ISystemInfo systemInfo;
private static readonly string[] pciVendorBlacklist = { "vbox", "80ee", "qemu", "1af4", "1b36" }; //Virtualbox: VBOX, 80EE RedHat: QUEMU, 1AF4, 1B36
public VirtualMachineDetector(ILogger logger, ISystemInfo systemInfo) public VirtualMachineDetector(ILogger logger, ISystemInfo systemInfo)
{ {
this.logger = logger; this.logger = logger;
@ -33,6 +33,17 @@ namespace SafeExamBrowser.SystemComponents
isVirtualMachine |= manufacturer.Contains("parallels software"); isVirtualMachine |= manufacturer.Contains("parallels software");
isVirtualMachine |= model.Contains("virtualbox"); isVirtualMachine |= model.Contains("virtualbox");
isVirtualMachine |= manufacturer.Contains("qemu"); isVirtualMachine |= manufacturer.Contains("qemu");
var macAddr = (from nic in NetworkInterface.GetAllNetworkInterfaces() where nic.OperationalStatus == OperationalStatus.Up select nic.GetPhysicalAddress().ToString()).FirstOrDefault();
isVirtualMachine |= ((byte.Parse(macAddr[1].ToString(), NumberStyles.HexNumber) & 2) == 2 || macAddr.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<PropertyData>().First().Value).ToLower().Contains);
}
logger.Debug($"Computer '{systemInfo.Name}' appears to {(isVirtualMachine ? "" : "not ")}be a virtual machine."); logger.Debug($"Computer '{systemInfo.Name}' appears to {(isVirtualMachine ? "" : "not ")}be a virtual machine.");