Nimble out-of-band authentication for EAP (EAP-NOOB)
draft-aura-eap-noob-06

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Network Working Group                                            T. Aura
Internet-Draft                                          Aalto University
Intended status: Standards Track                                M. Sethi
Expires: January 4, 2020                                        Ericsson
                                                            July 3, 2019

          Nimble out-of-band authentication for EAP (EAP-NOOB)
                         draft-aura-eap-noob-06

Abstract

   Extensible Authentication Protocol (EAP) provides support for
   multiple authentication methods.  This document defines the EAP-NOOB
   authentication method for nimble out-of-band (OOB) authentication and
   key derivation.  This EAP method is intended for bootstrapping all
   kinds of Internet-of-Things (IoT) devices that have a minimal user
   interface and no pre-configured authentication credentials.  The
   method makes use of a user-assisted one-directional OOB channel
   between the peer device and authentication server.

Status of This Memo

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

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   This Internet-Draft will expire on January 4, 2020.

Copyright Notice

   Copyright (c) 2019 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
   (https://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

Aura & Sethi             Expires January 4, 2020                [Page 1]
Internet-Draft                  EAP-NOOB                       July 2019

   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.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   4
   3.  EAP-NOOB protocol . . . . . . . . . . . . . . . . . . . . . .   5
     3.1.  Protocol overview . . . . . . . . . . . . . . . . . . . .   5
     3.2.  Protocol messages and sequences . . . . . . . . . . . . .   8
       3.2.1.  Common handshake in all EAP exchanges . . . . . . . .   8
       3.2.2.  Initial Exchange  . . . . . . . . . . . . . . . . . .  10
       3.2.3.  OOB Step  . . . . . . . . . . . . . . . . . . . . . .  11
       3.2.4.  Completion Exchange . . . . . . . . . . . . . . . . .  13
       3.2.5.  Waiting Exchange  . . . . . . . . . . . . . . . . . .  15
     3.3.  Protocol data fields  . . . . . . . . . . . . . . . . . .  16
       3.3.1.  Peer identifier, realm and NAI  . . . . . . . . . . .  16
       3.3.2.  Message data fields . . . . . . . . . . . . . . . . .  18
     3.4.  Fast reconnect and rekeying . . . . . . . . . . . . . . .  23
       3.4.1.  Persistent EAP-NOOB association . . . . . . . . . . .  23
       3.4.2.  Reconnect Exchange  . . . . . . . . . . . . . . . . .  24
       3.4.3.  User reset  . . . . . . . . . . . . . . . . . . . . .  27
     3.5.  Key derivation  . . . . . . . . . . . . . . . . . . . . .  28
     3.6.  Error handling  . . . . . . . . . . . . . . . . . . . . .  31
       3.6.1.  Invalid messages  . . . . . . . . . . . . . . . . . .  33
       3.6.2.  Unwanted peer . . . . . . . . . . . . . . . . . . . .  33
       3.6.3.  State mismatch  . . . . . . . . . . . . . . . . . . .  33
       3.6.4.  Negotiation failure . . . . . . . . . . . . . . . . .  33
       3.6.5.  Cryptographic verification failure  . . . . . . . . .  34
       3.6.6.  Application-specific failure  . . . . . . . . . . . .  34
   4.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  35
     4.1.  Cryptosuites  . . . . . . . . . . . . . . . . . . . . . .  35
     4.2.  Message Types . . . . . . . . . . . . . . . . . . . . . .  35
     4.3.  Error codes . . . . . . . . . . . . . . . . . . . . . . .  36
     4.4.  Domain name reservation considerations  . . . . . . . . .  37
   5.  Implementation Status . . . . . . . . . . . . . . . . . . . .  38
     5.1.  Implementation with wpa_supplicant and hostapd  . . . . .  38
     5.2.  Protocol modeling . . . . . . . . . . . . . . . . . . . .  39