EAP Session-Id Derivation for EAP-SIM, EAP-AKA, and PEAP
draft-ietf-emu-eap-session-id-04

Document Type Active Internet-Draft (emu WG)
Last updated 2020-06-11 (latest revision 2020-05-27)
Replaces draft-dekok-emu-eap-session-id
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Network Working Group                                        DeKok, Alan
INTERNET-DRAFT                                                FreeRADIUS
Updates: 5247 (if approved)                                  27 May 2020
Intended status: Standards Track
Expires: November 27, 2020

        EAP Session-Id Derivation for EAP-SIM, EAP-AKA, and PEAP
                  draft-ietf-emu-eap-session-id-04.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.  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 November 27, 2020.

Copyright Notice

   Copyright (c) 2020 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

DeKok, Alan                 Proposed Standard                   [Page 1]
INTERNET-DRAFT          EAP Session-ID Derivation            27 May 2020

   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
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   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 for EAP-AKA and EAP-SIM updates ...........    7
3.  Session-Id for PEAP ......................................    7
4.  Security Considerations ..................................    7
5.  IANA Considerations ......................................    8
6.  References ...............................................    8
   6.1.  Normative References ................................    8
   6.2.  Informative References ..............................    9

DeKok, Alan                 Proposed Standard                   [Page 3]
INTERNET-DRAFT          EAP Session-ID Derivation            27 May 2020

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 in order for the EAP Re-authentication Protocol (ERP)
   [RFC6696] to work.  It is therefore important to address the existing
   deficiencies in the definition of EAP Session-Id.

   Further, [RFC5247] did not define Session-Id for PEAP. We correct
   these deficiencies here by updating [RFC5247] with the Session-Id
   derivation during fast-authentication exchange for EAP-SIM and EAP-
   AKA; and defining Session-Id derivation for PEAP.

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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