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chore: switches to using var instead of explicit typing

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This commit is contained in:
Notselwyn 2023-04-14 20:13:29 +02:00
parent 538127661f
commit c201389af4
1 changed files with 27 additions and 30 deletions
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57
SafeExamBrowser.SystemComponents/VirtualMachineDetector.cs
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@ -72,7 +72,7 @@ namespace SafeExamBrowser.SystemComponents
private bool IsVirtualSystemInfo(string biosInfo, string manufacturer, string model)
{
bool isVirtualMachine = false;
var isVirtualMachine = false;
biosInfo = biosInfo.ToLower();
manufacturer = manufacturer.ToLower();
@ -95,16 +95,15 @@ namespace SafeExamBrowser.SystemComponents
private bool IsVirtualRegistry()
{
bool isVirtualMachine = false;
var isVirtualMachine = false;
// check historic hardware profiles
RegistryKey hardwareConfig = Microsoft.Win32.Registry.LocalMachine.OpenSubKey("SYSTEM\\HardwareConfig");
if (hardwareConfig != null)
var hardwareConfKey = Microsoft.Win32.Registry.LocalMachine.OpenSubKey("SYSTEM\\HardwareConfig");
if (hardwareConfKey != null)
{
foreach (string configId in hardwareConfig.GetSubKeyNames())
foreach (string configId in hardwareConfKey.GetSubKeyNames())
{
RegistryKey configKey = Microsoft.Win32.Registry.LocalMachine.OpenSubKey($"SYSTEM\\HardwareConfig\\{configId}");
var configKey = Microsoft.Win32.Registry.LocalMachine.OpenSubKey($"SYSTEM\\HardwareConfig\\{configId}");
if (configKey == null)
{
@ -112,52 +111,51 @@ namespace SafeExamBrowser.SystemComponents
}
// reconstruct the systemInfo.biosInfo string
string biosInfo = (string) configKey.GetValue("BIOSVendor") + " " + (string) configKey.GetValue("BIOSVersion");
string manufacturer = (string) configKey.GetValue("SystemManufacturer");
string model = (string) configKey.GetValue("SystemProductName");
var biosInfo = (string) configKey.GetValue("BIOSVendor") + " " + (string) configKey.GetValue("BIOSVersion");
var manufacturer = (string) configKey.GetValue("SystemManufacturer");
var model = (string) configKey.GetValue("SystemProductName");
isVirtualMachine |= IsVirtualSystemInfo(biosInfo, manufacturer, model);
// hardware information of profile throughout installation etc.
RegistryKey computerIds = Microsoft.Win32.Registry.LocalMachine.OpenSubKey($"SYSTEM\\HardwareConfig\\{configId}\\ComputerIds");
var computerIdsKey = Microsoft.Win32.Registry.LocalMachine.OpenSubKey($"SYSTEM\\HardwareConfig\\{configId}\\ComputerIds");
if (computerIds == null)
if (computerIdsKey == null)
{
continue;
}
foreach (string computerId in computerIds.GetSubKeyNames())
foreach (var computerId in computerIdsKey.GetSubKeyNames())
{
// e.g. manufacturer&version&sku&...
string computer = (string) computerIds.GetValue(computerId);
isVirtualMachine |= IsVirtualSystemInfo(computer, computer, computer);
var computerSummary = (string) computerIdsKey.GetValue(computerId);
isVirtualMachine |= IsVirtualSystemInfo(computerSummary, computerSummary, computerSummary);
}
}
}
// check Windows timeline caches for current hardware config
RegistryKey deviceCache = Microsoft.Win32.Registry.CurrentUser.OpenSubKey($"SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\TaskFlow\\DeviceCache");
if (deviceCache != null)
var deviceCacheKey = Microsoft.Win32.Registry.CurrentUser.OpenSubKey($"SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\TaskFlow\\DeviceCache");
if (deviceCacheKey != null)
{
foreach (string cacheId in deviceCache.GetSubKeyNames())
foreach (var cacheId in deviceCacheKey.GetSubKeyNames())
{
RegistryKey cacheKey = Microsoft.Win32.Registry.CurrentUser.OpenSubKey($"SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\TaskFlow\\DeviceCache\\{cacheId}");
var cacheKey = Microsoft.Win32.Registry.CurrentUser.OpenSubKey($"SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\TaskFlow\\DeviceCache\\{cacheId}");
if (cacheKey == null)
{
continue;
}
string currHostname = System.Environment.GetEnvironmentVariable("COMPUTERNAME").ToLower();
string cacheHostname = ((string) cacheKey.GetValue("DeviceName")).ToLower();
var currHostname = System.Environment.GetEnvironmentVariable("COMPUTERNAME").ToLower();
var cacheHostname = ((string) cacheKey.GetValue("DeviceName")).ToLower();
// windows timeline syncs with other hosts that a user has logged into: check hostname to only check this device
if (cacheHostname == currHostname)
{
string biosInfo = "";
string manufacturer = (string) cacheKey.GetValue("DeviceMake");
string model = (string) cacheKey.GetValue("DeviceModel");
var biosInfo = "";
var manufacturer = (string) cacheKey.GetValue("DeviceMake");
var model = (string) cacheKey.GetValue("DeviceModel");
isVirtualMachine |= IsVirtualSystemInfo(biosInfo, manufacturer, model);
}
@ -169,13 +167,12 @@ namespace SafeExamBrowser.SystemComponents
private bool IsVirtualWmi()
{
bool isVirtualMachine = false;
var isVirtualMachine = false;
var cpuObjSearcher = new ManagementObjectSearcher("SELECT * FROM Win32_Processor");
ManagementObjectSearcher searcherCpu = new ManagementObjectSearcher("SELECT * FROM Win32_Processor");
foreach (ManagementObject obj in searcherCpu.Get())
foreach (var cpuObj in cpuObjSearcher.Get())
{
isVirtualMachine |= ((string) obj["Name"]).ToLower().Contains(" kvm "); // qemu (KVM specifically)
isVirtualMachine |= ((string) cpuObj["Name"]).ToLower().Contains(" kvm "); // qemu (KVM specifically)
}
return isVirtualMachine;