Diameter Support for the EAP Re-authentication Protocol (ERP)
RFC 6942

Internet Engineering Task Force (IETF)                      J. Bournelle
Request for Comments: 6942                                     L. Morand
Category: Standards Track                                    Orange Labs
ISSN: 2070-1721                                               S. Decugis
                                                           INSIDE Secure
                                                                   Q. Wu
                                                                  Huawei
                                                                 G. Zorn
                                                             Network Zen
                                                                May 2013

     Diameter Support for the EAP Re-authentication Protocol (ERP)

Abstract

   The EAP Re-authentication Protocol (ERP) defines extensions to the
   Extensible Authentication Protocol (EAP) to support efficient
   re-authentication between the peer and an EAP Re-authentication (ER)
   server through a compatible authenticator.  This document specifies
   Diameter support for ERP.  It defines a new Diameter ERP application
   to transport ERP messages between an ER authenticator and the ER
   server, and a set of new Attribute-Value Pairs (AVPs) that can be
   used to transport the cryptographic material needed by the
   re-authentication server.

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/rfc6942.

Bournelle, et al.            Standards Track                    [Page 1]
RFC 6942                Diameter ERP Application                May 2013

Copyright Notice

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   document authors.  All rights reserved.

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   3
     2.1.  Requirements Language . . . . . . . . . . . . . . . . . .   4
   3.  Assumptions . . . . . . . . . . . . . . . . . . . . . . . . .   4
   4.  Protocol Overview . . . . . . . . . . . . . . . . . . . . . .   5
   5.  Bootstrapping the ER Server . . . . . . . . . . . . . . . . .   6
     5.1.  Bootstrapping during the Initial EAP Authentication . . .   6
     5.2.  Bootstrapping during the First Re-authentication  . . . .   8
   6.  Re-authentication . . . . . . . . . . . . . . . . . . . . . .  11
   7.  Application Id  . . . . . . . . . . . . . . . . . . . . . . .  12
   8.  AVPs  . . . . . . . . . . . . . . . . . . . . . . . . . . . .  13
     8.1.  ERP-RK-Request AVP  . . . . . . . . . . . . . . . . . . .  13
     8.2.  ERP-Realm AVP . . . . . . . . . . . . . . . . . . . . . .  13
     8.3.  Key AVP . . . . . . . . . . . . . . . . . . . . . . . . .  13
       8.3.1.  Key-Type AVP  . . . . . . . . . . . . . . . . . . . .  13
       8.3.2.  Keying-Material AVP . . . . . . . . . . . . . . . . .  13
       8.3.3.  Key-Name AVP  . . . . . . . . . . . . . . . . . . . .  14
       8.3.4.  Key-Lifetime AVP  . . . . . . . . . . . . . . . . . .  14
   9.  Result-Code AVP Values  . . . . . . . . . . . . . . . . . . .  14
     9.1.  Permanent Failures  . . . . . . . . . . . . . . . . . . .  14
   10. IANA Considerations . . . . . . . . . . . . . . . . . . . . .  14
     10.1.  Diameter Application Identifier  . . . . . . . . . . . .  14
     10.2.  New AVPs . . . . . . . . . . . . . . . . . . . . . . . .  15
     10.3.  New Permanent Failures Result-Code AVP Values  . . . . .  15
   11. Security Considerations . . . . . . . . . . . . . . . . . . .  15
   12. Contributors  . . . . . . . . . . . . . . . . . . . . . . . .  16
   13. Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  16
   14. References  . . . . . . . . . . . . . . . . . . . . . . . . .  16