From 843563ae889834b95a142524d23be8239927713d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Benjamin=20H=C3=B6glinger-Stelzer?= <nefarius@dhmx.at>
Date: Mon, 22 Oct 2018 20:39:35 +0200
Subject: [PATCH] Added even more helpers

---
 DerpingDrivers/DerpingDrivers.csproj      |  6 ++-
 DerpingDrivers/MainWindow.xaml            | 11 +++++
 DerpingDrivers/MainWindow.xaml.cs         | 24 ++++++++--
 DerpingDrivers/Util/OsUpgradeDetection.cs | 56 +++++++++++++++++++++++
 DerpingDrivers/Util/UEFIHelper.cs         | 49 ++++++++++++++++++++
 README.md                                 |  5 ++
 6 files changed, 147 insertions(+), 4 deletions(-)
 create mode 100644 DerpingDrivers/Util/OsUpgradeDetection.cs
 create mode 100644 DerpingDrivers/Util/UEFIHelper.cs
 create mode 100644 README.md

diff --git a/DerpingDrivers/DerpingDrivers.csproj b/DerpingDrivers/DerpingDrivers.csproj
index 523bcef..e7065dd 100644
--- a/DerpingDrivers/DerpingDrivers.csproj
+++ b/DerpingDrivers/DerpingDrivers.csproj
@@ -70,7 +70,9 @@
       <Generator>MSBuild:Compile</Generator>
       <SubType>Designer</SubType>
     </ApplicationDefinition>
+    <Compile Include="Util\OsUpgradeDetection.cs" />
     <Compile Include="Util\OSVersionInfo.cs" />
+    <Compile Include="Util\UEFIHelper.cs" />
     <Page Include="MainWindow.xaml">
       <Generator>MSBuild:Compile</Generator>
       <SubType>Designer</SubType>
@@ -102,7 +104,9 @@
       <Generator>ResXFileCodeGenerator</Generator>
       <LastGenOutput>Resources.Designer.cs</LastGenOutput>
     </EmbeddedResource>
-    <None Include="app.manifest" />
+    <None Include="app.manifest">
+      <SubType>Designer</SubType>
+    </None>
     <None Include="packages.config" />
     <None Include="Properties\Settings.settings">
       <Generator>SettingsSingleFileGenerator</Generator>
diff --git a/DerpingDrivers/MainWindow.xaml b/DerpingDrivers/MainWindow.xaml
index c0ac040..08e7b14 100644
--- a/DerpingDrivers/MainWindow.xaml
+++ b/DerpingDrivers/MainWindow.xaml
@@ -19,6 +19,8 @@
 
         <Grid Grid.Row="1">
             <Grid.RowDefinitions>
+                <RowDefinition Height="Auto" />
+                <RowDefinition Height="Auto" />
                 <RowDefinition Height="Auto" />
                 <RowDefinition Height="Auto" />
                 <RowDefinition Height="Auto" />
@@ -39,6 +41,15 @@
             
             <Label Grid.Row="2" Grid.Column="0">Windows architecture:</Label>
             <Label Grid.Row="2" Grid.Column="2" Content="{Binding Path=OsArchitecture}"/>
+            
+            <Label Grid.Row="3" Grid.Column="0">Current boot mode:</Label>
+            <Label Grid.Row="3" Grid.Column="2" Content="{Binding Path=BootMode}"/>
+            
+            <Label Grid.Row="4" Grid.Column="0">Secure Boot state:</Label>
+            <Label Grid.Row="4" Grid.Column="2" Content="{Binding Path=SecureBootEnabled}"/>
+            
+            <Label Grid.Row="5" Grid.Column="0">OS upgrade status:</Label>
+            <Label Grid.Row="5" Grid.Column="2" Content="{Binding Path=OsUpgradeStatus}"/>
 
         </Grid>
     </Grid>
diff --git a/DerpingDrivers/MainWindow.xaml.cs b/DerpingDrivers/MainWindow.xaml.cs
index c28af84..77ea289 100644
--- a/DerpingDrivers/MainWindow.xaml.cs
+++ b/DerpingDrivers/MainWindow.xaml.cs
@@ -14,19 +14,37 @@ namespace DerpingDrivers
         }
 
         /// <summary>
-        ///     Operating System Architecture display name
+        ///     Gets Operating System Architecture display name.
         /// </summary>
         public string OsArchitecture =>
             OsVersionInfo.OsBits == OsVersionInfo.SoftwareArchitecture.Bit64 ? "64-bit" : "32-bit";
 
         /// <summary>
-        ///     Operating System display name
+        ///     Gets Operating System display name.
         /// </summary>
         public string OsVersionName => $"{OsVersionInfo.Name} {OsVersionInfo.Edition}";
 
         /// <summary>
-        ///     Operating System build number
+        ///     Gets Operating System build number.
         /// </summary>
         public string OsVersion => OsVersionInfo.VersionString;
+
+        /// <summary>
+        ///     Gets Boot mode (Legacy BIOS, UEFI).
+        /// </summary>
+        public string BootMode => UEFIHelper.IsRunningInUEFIMode ? "UEFI" : "Legacy BIOS";
+
+        /// <summary>
+        ///     Gets Secure Boot status.
+        /// </summary>
+        public string SecureBootEnabled => UEFIHelper.IsRunningInUEFIMode
+            ? (UEFIHelper.IsSecureBootEnabled ? "Enabled" : "Disabled")
+            : "Not available";
+
+        /// <summary>
+        ///     Gets OS upgrade status.
+        /// </summary>
+        public string OsUpgradeStatus =>
+            OsUpgradeDetection.IsGrandfathered ? "In-place upgraded" : "Clean installation";
     }
 }
\ No newline at end of file
diff --git a/DerpingDrivers/Util/OsUpgradeDetection.cs b/DerpingDrivers/Util/OsUpgradeDetection.cs
new file mode 100644
index 0000000..f78a57f
--- /dev/null
+++ b/DerpingDrivers/Util/OsUpgradeDetection.cs
@@ -0,0 +1,56 @@
+using System;
+using System.Linq;
+using Microsoft.Win32;
+
+namespace DerpingDrivers.Util
+{
+    /// <summary>
+    ///     https://superuser.com/a/1184670
+    /// </summary>
+    public class OsUpgradeDetection
+    {
+        public static bool IsGrandfathered
+        {
+            get
+            {
+                using (var setupKey = Registry.LocalMachine.OpenSubKey(@"SYSTEM\Setup"))
+                {
+                    using (var upgradeKey = setupKey?.OpenSubKey("Upgrade"))
+                    {
+                        // if this key isn't there, don't look any further
+                        if (upgradeKey == null) return false;
+
+                        // only look at "Source OS (...)" sub-keys
+                        foreach (var sosKeyName in setupKey.GetSubKeyNames().Where(v =>
+                            v.StartsWith("Source OS", StringComparison.InvariantCultureIgnoreCase)))
+                        {
+                            using (var sosKey = setupKey.OpenSubKey(sosKeyName))
+                            {
+                                var productName = sosKey?.GetValue("ProductName") as string;
+
+                                if (string.IsNullOrEmpty(productName))
+                                {
+                                    continue;
+                                }
+
+                                // TODO: untested but should work
+                                if (productName.StartsWith("Windows 7", StringComparison.InvariantCultureIgnoreCase))
+                                {
+                                    return true;
+                                }
+
+                                // TODO: untested but should work
+                                if (productName.StartsWith("Windows 8", StringComparison.InvariantCultureIgnoreCase))
+                                {
+                                    return true;
+                                }
+                            }
+                        }
+                    }
+                }
+
+                return false;
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/DerpingDrivers/Util/UEFIHelper.cs b/DerpingDrivers/Util/UEFIHelper.cs
new file mode 100644
index 0000000..5f0a77f
--- /dev/null
+++ b/DerpingDrivers/Util/UEFIHelper.cs
@@ -0,0 +1,49 @@
+using System;
+using System.Runtime.InteropServices;
+using Microsoft.Win32;
+
+namespace DerpingDrivers.Util
+{
+    public class UEFIHelper
+    {
+        /// <summary>
+        ///     Checks if Secure Boot is enabled.
+        /// </summary>
+        public static bool IsSecureBootEnabled
+        {
+            get
+            {
+                var val = Convert.ToInt32(Registry.GetValue(
+                    @"HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SecureBoot\State", 
+                    "UEFISecureBootEnabled",
+                    0));
+
+                return val > 0;
+            }
+        }
+
+        /// <summary>
+        ///     Checks if the current system is running in UEFI or Legacy BIOS mode.
+        /// </summary>
+        /// <remarks>https://theroadtodelphi.com/2013/02/19/how-distinguish-when-windows-was-installed-in-legacy-bios-or-uefi-mode-using-delphi/</remarks>
+        public static bool IsRunningInUEFIMode
+        {
+            get
+            {
+                GetFirmwareEnvironmentVariable(
+                    string.Empty,
+                    "{00000000-0000-0000-0000-000000000000}",
+                    IntPtr.Zero, 0);
+
+                var error = Marshal.GetLastWin32Error();
+
+                return error != 0x01; // ERROR_INVALID_FUNCTION
+            }
+        }
+
+        [DllImport("kernel32.dll", EntryPoint = "GetFirmwareEnvironmentVariableW", SetLastError = true,
+            CharSet = CharSet.Unicode, ExactSpelling = true)]
+        private static extern uint GetFirmwareEnvironmentVariable(string lpName, string lpGuid, IntPtr pBuffer,
+            uint nSize);
+    }
+}
\ No newline at end of file
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..d7dfddc
--- /dev/null
+++ b/README.md
@@ -0,0 +1,5 @@
+# Derping Drivers!
+
+## Sources
+
+- [Getting Operating System Version Info - Even for Windows 10!](<https://www.codeproject.com/Articles/73000/Getting-Operating-System-Version-Info-Even-for-Win>)
\ No newline at end of file