TLS-based EAP types and TLS 1.3
draft-dekok-emu-tls-eap-types-01

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Network Working Group                                        DeKok, Alan
INTERNET-DRAFT                                                FreeRADIUS
Updates: 5247, 5281, 7170
Category: Standards Track
<draft-dekok-emu-tls-eap-types-01.txt>
25 March 2020

                    TLS-based EAP types and TLS 1.3
                  draft-dekok-emu-tls-eap-types-01.txt

Abstract

   EAP-TLS [RFC5216] is being updated for TLS 1.3 in [EAPTLS].  Many
   other EAP [RFC3748] and [RFC5247] types also depend on TLS, such as
   FAST [RFC4851], TTLS [RFC5281], TEAP [RFC7170], and possibly many
   vendor specific EAP methods.  This document updates those methods in
   order to use the new key derivation methods available in TLS 1.3.
   Additional changes necessitated by TLS 1.3 are also discussed.

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 October 25, 2020.

Copyright Notice

   Copyright (c) 2020 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

DeKok, Alan                 Proposed Standard                   [Page 1]
INTERNET-DRAFT          EAP Session-ID Derivation          25 March 2020

   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
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   described in the Simplified BSD License.

DeKok, Alan                 Proposed Standard                   [Page 2]
INTERNET-DRAFT          EAP Session-ID Derivation          25 March 2020

Table of Contents

1.  Introduction .............................................    4
   1.1.  Requirements Language ...............................    4
2.  Using TLS-based EAP methods with TLS 1.3 .................    5
   2.1.  Key Derivation ......................................    5
   2.2.  FAST and TEAP .......................................    6
3.  Application Data .........................................    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          25 March 2020

1.  Introduction

   EAP-TLS is being updated for TLS 1.3 in [EAPTLS].  Many other EAP
   types also depend on TLS, such as FAST [RFC4851], TTLS [RFC5281],
   TEAP [RFC7170], and possibly many vendor specific EAP methods.  All
   of these methods use key derivation functions that rely on the
   information which is no longer available in TLS 1.3.  As such, all of
   those methods are incompatible with TLS 1.3.

   We wish to enable the use of TLS 1.3 in the wider Internet community.
   As such, it is necessary to update the above EAP types.  These
   changes involve defining new key derivation functions.  We also
   discuss implementation issues in order to highlight differences
   between TLS 1.3 and earlier versions of TLS.

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
   14 [RFC2119] [RFC8174] when, and only when, they appear in all
   capitals, as shown here.

DeKok, Alan                 Proposed Standard                   [Page 4]
INTERNET-DRAFT          EAP Session-ID Derivation          25 March 2020

2.  Using TLS-based EAP methods with TLS 1.3

   In general, all of the requirements of [EAPTLS] apply to other EAP