Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.IdentityModel/System/ServiceModel/Security/ISspiNegotiation.cs

@@ -0,0 +1,53 @@
+//-----------------------------------------------------------------------------
+// Copyright (c) Microsoft Corporation.  All rights reserved.
+//-----------------------------------------------------------------------------
+
+namespace System.ServiceModel.Security
+{
+    using System;
+    using System.Runtime.CompilerServices;
+    using System.Security.Authentication.ExtendedProtection;
+
+    [TypeForwardedFrom("System.ServiceModel, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089")]
+    interface ISspiNegotiation : IDisposable
+    {
+
+        DateTime ExpirationTimeUtc
+        {
+            get;
+        }
+        /// <summary>
+        /// This indicates if the handshake is complete or not. 
+        /// Note that the IsValidContext flag indicates if the handshake ended in
+        /// success or failure
+        /// </summary>
+        bool IsCompleted
+        {
+            get;
+        }
+
+        bool IsValidContext
+        {
+            get;
+        }
+
+        string KeyEncryptionAlgorithm
+        {
+            get;
+        }
+
+        byte[] Decrypt(byte[] encryptedData);
+
+        byte[] Encrypt(byte[] data);
+
+        byte[] GetOutgoingBlob(byte[] incomingBlob, ChannelBinding channelbinding, ExtendedProtectionPolicy protectionPolicy);
+
+        string GetRemoteIdentityName();
+    }
+
+    [TypeForwardedFrom("System.ServiceModel, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089")]
+    interface ISspiNegotiationInfo
+    {
+        ISspiNegotiation SspiNegotiation { get; }
+    }
+}