EAP Session-Id Derivation
draft-ietf-emu-eap-session-id-00

Document Type Active Internet-Draft (emu WG)
Last updated 2019-08-29
Replaces draft-dekok-emu-eap-session-id
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Network Working Group                                        DeKok, Alan
INTERNET-DRAFT                                                FreeRADIUS
Updates: 5247
Category: Standards Track
<draft-ietf-emu-eap-session-id-00.txt>
29 August 2019

                       EAP Session-Id Derivation
                  draft-ietf-emu-eap-session-id-00.txt

Abstract

   EAP Session-Id derivation has not been defined for EAP-SIM or EAP-AKA
   when using the fast re-authentication exchange instead of full
   authentication.  This document updates RFC 5247 to define those
   derivations for EAP-SIM and EAP-AKA.  Since [AKAP] defines the
   Session-ID for EAP-AKA', the definition for EAP-AKA' is not included
   here.  RFC 5247 also does not define Session-Id derivation for PEAP.
   A definition is given here which follows the definition for other
   TLS-based EAP methods.

Status of this Memo

   This Internet-Draft is submitted to IETF in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
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   This Internet-Draft will expire on February 28, 2020.

Copyright Notice

   Copyright (c) 2019 IETF Trust and the persons identified as the

DeKok, Alan                 Proposed Standard                   [Page 1]
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   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
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   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.

DeKok, Alan                 Proposed Standard                   [Page 2]
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Table of Contents

1.  Introduction .............................................    4
   1.1.  Requirements Language ...............................    4
2.  Updates to RFC 5247 Appendix A ...........................    5
   2.1.  EAP-AKA .............................................    5
   2.2.  EAP-SIM .............................................    5
   2.3.  Rationale ...........................................    7
   2.4.  Session-Id for PEAP .................................    7
3.  Security Considerations ..................................    7
4.  IANA Considerations ......................................    8
5.  References ...............................................    8
   5.1.  Normative References ................................    8
   5.2.  Informative References ..............................    8

DeKok, Alan                 Proposed Standard                   [Page 3]
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1.  Introduction

   EAP [RFC3748] Session-Id derivation has not been defined for EAP-SIM
   and EAP-AKA when using the fast re-authentication exchange instead of
   full authentication.  [RFC5247] defines the Session-Id for these EAP
   methods, but that derivation is only applicable for the full
   authentication case.  The Session-Id derivation was not defined for
   EAP-AKA', but [AKAP] now defines it, along with other updates.  As
   such, the definition for EAP-AKA' is not included here.

   The IEEE is defining FILS authentication [FILS], which needs the EAP
   Session-Id for in order for the EAP Re-authentication Protocol (ERP)
   [RFC5296] to work, it would be important to get this resolved with a
   clearly defined and agreed derivation rules to allow fast re-
   authentication cases to be used to derive ERP key hierarchy.

   Further, [RFC5247] did not define Session-Id for PEAP.  We correct
   that deficiency here.

1.1.  Requirements Language

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and
   "OPTIONAL" in this document are to be interpreted as described in BCP
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