Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Web/ITlsTokenBindingInfo.cs

@@ -0,0 +1,36 @@
+//------------------------------------------------------------------------------
+// <copyright file="ITlsTokenBindingInfo.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>
+//------------------------------------------------------------------------------
+
+namespace System.Web {
+    using System;
+
+    // Represents token binding information for a request.
+    // TLS token bindings help mitigate the risk of impersonation by an
+    // attacker in the event an authenticated client's bearer tokens are
+    // somehow exfiltrated from the client's machine.
+    // More info: https://datatracker.ietf.org/doc/draft-popov-token-binding/
+    public interface ITlsTokenBindingInfo {
+        // Gets the 'provided' token binding identifier associated with
+        // the request. This method could return null if the client did
+        // not supply a 'provided' token binding or if the client did
+        // not supply a valid proof of possession for the associated
+        // private key.
+        //
+        // The caller should treat this token binding id as an opaque blob
+        // and should not try to parse it.
+        byte[] GetProvidedTokenBindingId();
+
+        // Gets the 'referred' token binding identifier associated with
+        // the request. This method could return null if the client did
+        // not supply a 'referred' token binding or if the client did
+        // not supply a valid proof of possession for the associated
+        // private key.
+        //
+        // The caller should treat this token binding id as an opaque blob
+        // and should not try to parse it.
+        byte[] GetReferredTokenBindingId();
+    }
+}