Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Web/Configuration/MachineKeyValidationConverter.cs

@@ -0,0 +1,87 @@
+//------------------------------------------------------------------------------
+// <copyright file="TimeSpanMinutesConverter.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>
+//------------------------------------------------------------------------------
+
+using System;
+using System.Collections;
+using System.IO;
+using System.Reflection;
+using System.Security.Permissions;
+using System.Xml;
+using System.Collections.Specialized;
+using System.Globalization;
+using System.ComponentModel;
+using System.Security;
+using System.Text;
+using System.Configuration;
+
+namespace System.Web.Configuration {
+
+    [System.Security.Permissions.HostProtection(MayLeakOnAbort = true)]
+    public sealed class MachineKeyValidationConverter : ConfigurationConverterBase {
+
+        public override object ConvertTo(ITypeDescriptorContext ctx, CultureInfo ci, object value, Type type) {
+            if (!(value is MachineKeyValidation)) {
+                throw new ArgumentException(SR.GetString(SR.Config_Invalid_enum_value, "SHA1, MD5, 3DES, AES, HMACSHA256, HMACSHA384, HMACSHA512"));
+            }
+            return ConvertFromEnum((MachineKeyValidation)value);
+        }
+
+        public override object ConvertFrom(ITypeDescriptorContext ctx, CultureInfo ci, object data)
+        {
+            return ConvertToEnum((string)data);
+        }
+
+        internal static string ConvertFromEnum(MachineKeyValidation enumValue)
+        {
+            switch (enumValue) {
+                case MachineKeyValidation.SHA1:
+                    return "SHA1";
+                case MachineKeyValidation.MD5:
+                    return "MD5";
+                case MachineKeyValidation.TripleDES:
+                    return "3DES";
+                case MachineKeyValidation.AES:
+                    return "AES";
+                case MachineKeyValidation.HMACSHA256:
+                    return "HMACSHA256";
+                case MachineKeyValidation.HMACSHA384:
+                    return "HMACSHA384";
+                case MachineKeyValidation.HMACSHA512:
+                    return "HMACSHA512";
+                default:
+                    throw new ArgumentException(SR.GetString(SR.Wrong_validation_enum));
+            }
+        }
+
+        internal static MachineKeyValidation ConvertToEnum(string strValue)
+        {
+            if (strValue==null)
+                return MachineKeySection.DefaultValidation;
+
+            switch (strValue)
+            {
+                case "SHA1":
+                    return MachineKeyValidation.SHA1;
+                case "MD5":
+                    return MachineKeyValidation.MD5;
+                case "3DES":
+                    return MachineKeyValidation.TripleDES;
+                case "AES":
+                    return MachineKeyValidation.AES;
+                case "HMACSHA256":
+                    return MachineKeyValidation.HMACSHA256;
+                case "HMACSHA384":
+                    return MachineKeyValidation.HMACSHA384;
+                case "HMACSHA512":
+                    return MachineKeyValidation.HMACSHA512;
+                default:
+                    if (strValue.StartsWith("alg:", StringComparison.Ordinal))
+                        return MachineKeyValidation.Custom;
+                    throw new ArgumentException(SR.GetString(SR.Wrong_validation_enum));
+            }
+        }
+    }
+}