63 lines
2.0 KiB
C#
63 lines
2.0 KiB
C#
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//----------------------------------------------------------------------------
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// Copyright (c) Microsoft Corporation. All rights reserved.
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//----------------------------------------------------------------------------
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namespace System.ServiceModel.Activation
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{
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using System.Runtime;
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using System.Security;
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using System.Security.Permissions;
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using Microsoft.Win32;
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static class Iis7Helper
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{
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static int iisVersion;
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static bool isIis7;
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static Iis7Helper()
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{
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isIis7 = GetIsIis7();
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}
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internal static int IisVersion
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{
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get { return iisVersion; }
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}
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internal static bool IsIis7
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{
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get { return isIis7; }
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}
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[Fx.Tag.SecurityNote(Critical = "Uses SecurityCritical method to get version info from registry.",
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Safe = "Processes registry info into a safe bool for return.")]
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[SecuritySafeCritical]
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static bool GetIsIis7()
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{
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iisVersion = -1;
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object majorVersion = UnsafeGetMajorVersionFromRegistry();
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if (majorVersion != null && majorVersion.GetType().Equals(typeof(int)))
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{
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iisVersion = (int)majorVersion;
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}
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return iisVersion >= 7;
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}
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const string subKey = @"Software\Microsoft\InetSTP";
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[Fx.Tag.SecurityNote(Critical = "Asserts registry access to get a single value from the registry, caller should not leak value.")]
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[SecurityCritical]
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[RegistryPermission(SecurityAction.Assert, Read = @"HKEY_LOCAL_MACHINE\" + subKey)]
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static object UnsafeGetMajorVersionFromRegistry()
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{
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using (RegistryKey localMachine = Registry.LocalMachine)
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{
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using (RegistryKey versionKey = localMachine.OpenSubKey(subKey))
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{
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return versionKey != null ? versionKey.GetValue("MajorVersion") : null;
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}
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}
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}
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}
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}
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