Implemented BcdHelper

Updated README

DerpingDrivers/DerpingDrivers.csproj

@@ -79,6 +79,9 @@
     <Reference Include="PInvoke.Windows.Core, Version=0.5.0.0, Culture=neutral, PublicKeyToken=9e300f9f87f04a7a, processorArchitecture=MSIL">
       <HintPath>..\packages\PInvoke.Windows.Core.0.5.155\lib\net35\PInvoke.Windows.Core.dll</HintPath>
     </Reference>
+    <Reference Include="RunProcessAsTask, Version=1.2.3.0, Culture=neutral, processorArchitecture=MSIL">
+      <HintPath>..\packages\RunProcessAsTask.1.2.3\lib\net45\RunProcessAsTask.dll</HintPath>
+    </Reference>
     <Reference Include="SimpleMapi, Version=1.0.0.0, Culture=neutral, processorArchitecture=MSIL">
       <HintPath>..\packages\Simple-MAPI.NET.1.1.0\lib\net20\SimpleMapi.dll</HintPath>
     </Reference>
@@ -111,12 +114,14 @@
       <Generator>MSBuild:Compile</Generator>
       <SubType>Designer</SubType>
     </ApplicationDefinition>
+    <Compile Include="Exceptions\BcdAlterAllowPrereleaseSignaturesFailedException.cs" />
     <Compile Include="Exceptions\NtQuerySystemInformationException.cs" />
     <Compile Include="Properties\Resources.Designer.cs">
       <AutoGen>True</AutoGen>
       <DesignTime>True</DesignTime>
       <DependentUpon>Resources.resx</DependentUpon>
     </Compile>
+    <Compile Include="Util\BcdHelper.cs" />
     <Compile Include="Util\CodeIntegrityHelper.cs" />
     <Compile Include="Util\OsUpgradeDetection.cs" />
     <Compile Include="Util\OSVersionInfo.cs" />

DerpingDrivers/Exceptions/BcdAlterAllowPrereleaseSignaturesFailedException.cs

@@ -0,0 +1,24 @@
+using System;
+using System.Runtime.Serialization;
+
+namespace DerpingDrivers.Exceptions
+{
+    public class BcdAlterAllowPrereleaseSignaturesFailedException : Exception
+    {
+        public BcdAlterAllowPrereleaseSignaturesFailedException()
+        {
+        }
+
+        public BcdAlterAllowPrereleaseSignaturesFailedException(string message) : base(message)
+        {
+        }
+
+        public BcdAlterAllowPrereleaseSignaturesFailedException(string message, Exception innerException) : base(message, innerException)
+        {
+        }
+
+        protected BcdAlterAllowPrereleaseSignaturesFailedException(SerializationInfo info, StreamingContext context) : base(info, context)
+        {
+        }
+    }
+}

DerpingDrivers/MainWindow.xaml.cs

@@ -69,6 +69,8 @@ namespace DerpingDrivers
         {
             get
             {
+                var t = BcdHelper.IsTestSignEnabled;
+
                 #region TESTSIGNING mode
 
                 if (CodeIntegrityHelper.IsTestSignEnabled)

DerpingDrivers/Util/BcdHelper.cs

@@ -0,0 +1,47 @@
+using DerpingDrivers.Exceptions;
+using Microsoft.Win32;
+using RunProcessAsTask;
+
+namespace DerpingDrivers.Util
+{
+    public static class BcdHelper
+    {
+        public static bool IsTestSignEnabled
+        {
+            get
+            {
+                var bootmgrDefaultGuid = (string) Registry.GetValue(
+                    @"HKEY_LOCAL_MACHINE\BCD00000000\Objects\{9DEA862C-5CDD-4E70-ACC1-F32B344D4795}\Elements\23000003",
+                    "Element", null);
+
+                var allowPrereleaseSignatures = (byte[]) Registry.GetValue(
+                    $@"HKEY_LOCAL_MACHINE\BCD00000000\Objects\{bootmgrDefaultGuid}\Elements\16000049",
+                    "Element", default(byte[]));
+
+                return allowPrereleaseSignatures != null && bool.Parse(allowPrereleaseSignatures[0].ToString());
+            }
+        }
+
+        public static void EnableTestSigning()
+        {
+            // NOTE: haven't found an API for this (yet), so system() we go!
+            var ret = ProcessEx.RunAsync("Bcdedit.exe", "-set TESTSIGNING ON").Result;
+
+            if (ret.ExitCode != 0)
+            {
+                throw new BcdAlterAllowPrereleaseSignaturesFailedException("Couldn't enable TESTSIGNING");
+            }
+        }
+
+        public static void DisableTestSigning()
+        {
+            // NOTE: haven't found an API for this (yet), so system() we go!
+            var ret = ProcessEx.RunAsync("Bcdedit.exe", "-set TESTSIGNING OFF").Result;
+
+            if (ret.ExitCode != 0)
+            {
+                throw new BcdAlterAllowPrereleaseSignaturesFailedException("Couldn't disable TESTSIGNING");
+            }
+        }
+    }
+}

DerpingDrivers/packages.config

@@ -12,5 +12,6 @@
   <package id="Markdig.Wpf" version="0.2.5" targetFramework="net461" />
   <package id="PInvoke.Kernel32" version="0.5.155" targetFramework="net461" />
   <package id="PInvoke.Windows.Core" version="0.5.155" targetFramework="net461" />
+  <package id="RunProcessAsTask" version="1.2.3" targetFramework="net461" />
   <package id="Simple-MAPI.NET" version="1.1.0" targetFramework="net461" />
 </packages>

README.md

@@ -4,9 +4,13 @@
 
 - Icon by [Rebin Infotech](https://www.iconfinder.com/rebininfotech)
 - [Getting Operating System Version Info - Even for Windows 10!](https://www.codeproject.com/Articles/73000/Getting-Operating-System-Version-Info-Even-for-Win)
-- [How do I tell if Windows 10 was a fresh install or upgrade from 7/8?](https://superuser.com/questions/1032064/how-do-i-tell-if-windows-10-was-a-fresh-install-or-upgrade-from-7-8/1184670#1184670)
 - [NtQuerySystemInformation](https://docs.microsoft.com/de-de/windows/desktop/api/winternl/nf-winternl-ntquerysysteminformation)
-- [Can I have any way to detect the Driver Signing Policy status?](https://stackoverflow.com/questions/40084077/can-i-have-any-way-to-detect-the-driver-signing-policy-status/51230137#51230137)
 - [The TESTSIGNING Boot Configuration Option](https://docs.microsoft.com/en-us/windows-hardware/drivers/install/the-testsigning-boot-configuration-option)
 - [Windows Version Numbers](http://techthoughts.info/windows-version-numbers/)
-- [Is there an easy way to check the .NET Framework version?](https://stackoverflow.com/questions/951856/is-there-an-easy-way-to-check-the-net-framework-version)
+- [Super user: How do I tell if Windows 10 was a fresh install or upgrade from 7/8?](https://superuser.com/questions/1032064/how-do-i-tell-if-windows-10-was-a-fresh-install-or-upgrade-from-7-8/1184670#1184670)
+- [Stack Overflow: Is there an easy way to check the .NET Framework version?](https://stackoverflow.com/questions/951856/is-there-an-easy-way-to-check-the-net-framework-version)
+- [Stack Overflow: Can I have any way to detect the Driver Signing Policy status?](https://stackoverflow.com/questions/40084077/can-i-have-any-way-to-detect-the-driver-signing-policy-status/51230137#51230137)
+- [BCDEdit: Mounting the BCD Store as a Registry Hive](http://www.mistyprojects.co.uk/documents/BCDEdit/files/bcd_as_registry_hive.htm)
+- [BCDEdit: Objects and Elements](http://www.mistyprojects.co.uk/documents/BCDEdit/files/object_element_codes.htm)
+- [Geoff Chappell: BCD Elements](https://www.geoffchappell.com/notes/windows/boot/bcd/elements.htm)
+- [Geoff Chappell: Back Doors for Cross-Signed Drivers](https://www.geoffchappell.com/notes/security/whqlsettings/index.htm)