Imported Upstream version 4.0.0~alpha1

Former-commit-id: 806294f5ded97629b74c85c09952f2a74fe182d9

external/referencesource/System.Web/Configuration/MachineKeyValidation.cs

@@ -0,0 +1,38 @@
+//------------------------------------------------------------------------------
+// <copyright file="MachineKeyValidation.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>
+//------------------------------------------------------------------------------
+
+namespace System.Web.Configuration
+{
+    using System;
+    using System.Xml;
+    using System.Configuration;
+    using System.Collections.Specialized;
+    using System.Collections;
+    using System.IO;
+    using System.Text;
+    using System.Security.Cryptography;
+    using System.Web.Util;
+    using System.Globalization;
+    using System.Web.Hosting;
+    using System.Runtime.InteropServices;
+    using System.ComponentModel;
+    using System.Diagnostics.CodeAnalysis;
+
+    public enum MachineKeyValidation
+    {
+        MD5,
+        SHA1,
+        TripleDES,
+        AES,
+        [SuppressMessage("Microsoft.Naming", "CA1705:LongAcronymsShouldBePascalCased", Justification = "Matches spec and previous shipped values")]
+        HMACSHA256,
+        [SuppressMessage("Microsoft.Naming", "CA1705:LongAcronymsShouldBePascalCased", Justification = "Matches spec and previous shipped values")]
+        HMACSHA384,
+        [SuppressMessage("Microsoft.Naming", "CA1705:LongAcronymsShouldBePascalCased", Justification = "Matches spec and previous shipped values")]
+        HMACSHA512,
+        Custom
+    }
+}