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Channel-Binding Support for Extensible Authentication Protocol (EAP) Methods
RFC 6677

Internet Engineering Task Force (IETF)                   S. Hartman, Ed.
Request for Comments: 6677                             Painless Security
Category: Standards Track                                      T. Clancy
ISSN: 2070-1721                                            Virginia Tech
                                                               K. Hoeper
                                                Motorola Solutions, Inc.
                                                               July 2012

                        Channel-Binding Support
          for Extensible Authentication Protocol (EAP) Methods

Abstract

   This document defines how to implement channel bindings for
   Extensible Authentication Protocol (EAP) methods to address the
   "lying Network Access Service (NAS)" problem as well as the "lying
   provider" problem.

Status of This Memo

   This is an Internet Standards Track document.

   This document is a product of the Internet Engineering Task Force
   (IETF).  It represents the consensus of the IETF community.  It has
   received public review and has been approved for publication by the
   Internet Engineering Steering Group (IESG).  Further information on
   Internet Standards is available in Section 2 of RFC 5741.

   Information about the current status of this document, any errata,
   and how to provide feedback on it may be obtained at
   http://www.rfc-editor.org/info/rfc6677.

Hartman, et al.              Standards Track                    [Page 1]
RFC 6677                   EAP Channel Binding                 July 2012

Copyright Notice

   Copyright (c) 2012 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents
   (http://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
   to this document.  Code Components extracted from this document must
   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

   This document may contain material from IETF Documents or IETF
   Contributions published or made publicly available before November
   10, 2008.  The person(s) controlling the copyright in some of this
   material may not have granted the IETF Trust the right to allow
   modifications of such material outside the IETF Standards Process.
   Without obtaining an adequate license from the person(s) controlling
   the copyright in such materials, this document may not be modified
   outside the IETF Standards Process, and derivative works of it may
   not be created outside the IETF Standards Process, except to format
   it for publication as an RFC or to translate it into languages other
   than English.

Hartman, et al.              Standards Track                    [Page 2]
RFC 6677                   EAP Channel Binding                 July 2012

Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  4
   2.  Terminology  . . . . . . . . . . . . . . . . . . . . . . . . .  5
   3.  Problem Statement  . . . . . . . . . . . . . . . . . . . . . .  5
   4.  Channel Bindings . . . . . . . . . . . . . . . . . . . . . . .  7
     4.1.  Types of EAP Channel Bindings  . . . . . . . . . . . . . .  8
     4.2.  Channel Bindings in the Secure Association Protocol  . . .  9
     4.3.  Channel-Binding Scope  . . . . . . . . . . . . . . . . . . 10
   5.  Channel-Binding Process  . . . . . . . . . . . . . . . . . . . 12
     5.1.  Protocol Operation . . . . . . . . . . . . . . . . . . . . 12
     5.2.  Channel-Binding Consistency Check  . . . . . . . . . . . . 14
     5.3.  EAP Protocol . . . . . . . . . . . . . . . . . . . . . . . 15
       5.3.1.  Channel-Binding Codes  . . . . . . . . . . . . . . . . 17
       5.3.2.  Namespace Identifiers  . . . . . . . . . . . . . . . . 17
       5.3.3.  RADIUS Namespace . . . . . . . . . . . . . . . . . . . 18
   6.  System Requirements  . . . . . . . . . . . . . . . . . . . . . 18
     6.1.  General Transport Protocol Requirements  . . . . . . . . . 18
     6.2.  EAP Method Requirements  . . . . . . . . . . . . . . . . . 19
   7.  Channel-Binding TLV  . . . . . . . . . . . . . . . . . . . . . 19
     7.1.  Requirements for Lower-Layer Bindings  . . . . . . . . . . 19
     7.2.  EAP Lower-Layer Attribute  . . . . . . . . . . . . . . . . 20
   8.  AAA-Layer Bindings . . . . . . . . . . . . . . . . . . . . . . 20
   9.  Security Considerations  . . . . . . . . . . . . . . . . . . . 21

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