Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Web/Security/Cryptography/ICryptoService.cs

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+//------------------------------------------------------------------------------
+// <copyright file="ICryptoService.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>                                                                
+//------------------------------------------------------------------------------
+
+namespace System.Web.Security.Cryptography {
+    using System;
+
+    // Represents an object that can perform cryptographic operations.
+    // Get an instance of this class via an ICryptoServiceProvider (like AspNetCryptoServiceProvider).
+
+    internal interface ICryptoService {
+
+        // Protects some data by applying appropriate cryptographic transformations to it.
+        byte[] Protect(byte[] clearData);
+
+        // Returns the unprotected form of some protected data by validating and undoing the cryptographic transformations that led to it.
+        byte[] Unprotect(byte[] protectedData);
+    
+    }
+}