Lightweight Authorization for Authenticated Key Exchange.
draft-selander-ace-ake-authz-01

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Network Working Group                                        G. Selander
Internet-Draft                                               J. Mattsson
Intended status: Informational                               Ericsson AB
Expires: 10 September 2020                                    M. Vucinic
                                                                   INRIA
                                                           M. Richardson
                                                Sandelman Software Works
                                                         A. Schellenbaum
                                     Institute of Embedded Systems, ZHAW
                                                            9 March 2020

       Lightweight Authorization for Authenticated Key Exchange.
                    draft-selander-ace-ake-authz-01

Abstract

   This document describes a procedure for augmenting an authenticated
   Diffie-Hellman key exchange with third party assisted authorization
   targeting constrained IoT deployments (RFC 7228).

Note to Readers

   Source for this draft and an issue tracker can be found at
   https://github.com/EricssonResearch/ace-ake-authz
   (https://github.com/EricssonResearch/ace-ake-authz).

Status of This Memo

   This Internet-Draft is submitted 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 10 September 2020.

Copyright Notice

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

Selander, et al.        Expires 10 September 2020               [Page 1]
Internet-Draft     Lightweight Authorization for AKE.         March 2020

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   Please review these documents carefully, as they describe your rights
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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Terminology . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Problem Description . . . . . . . . . . . . . . . . . . . . .   4
   3.  Assumptions . . . . . . . . . . . . . . . . . . . . . . . . .   4
     3.1.  Device  . . . . . . . . . . . . . . . . . . . . . . . . .   4
     3.2.  Domain Authenticator  . . . . . . . . . . . . . . . . . .   5
     3.3.  Authorization Server  . . . . . . . . . . . . . . . . . .   5
     3.4.  Lightweight AKE . . . . . . . . . . . . . . . . . . . . .   6
   4.  The Protocol  . . . . . . . . . . . . . . . . . . . . . . . .   6
     4.1.  Device <-> Authorization Server . . . . . . . . . . . . .   7
       4.1.1.  Voucher . . . . . . . . . . . . . . . . . . . . . . .   9
     4.2.  Device <-> Authenticator  . . . . . . . . . . . . . . . .  10
       4.2.1.  Message 1 . . . . . . . . . . . . . . . . . . . . . .  10
       4.2.2.  Message 2 . . . . . . . . . . . . . . . . . . . . . .  10
       4.2.3.  Message 3 . . . . . . . . . . . . . . . . . . . . . .  11
     4.3.  Authenticator <-> Authorization Server  . . . . . . . . .  11
       4.3.1.  Voucher Request . . . . . . . . . . . . . . . . . . .  11
       4.3.2.  Voucher Response  . . . . . . . . . . . . . . . . . .  12
   5.  ACE Profile . . . . . . . . . . . . . . . . . . . . . . . . .  12
     5.1.  Protocol Overview . . . . . . . . . . . . . . . . . . . .  12
     5.2.  AS Request Creation Hints . . . . . . . . . . . . . . . .  13
     5.3.  Client-to-AS Request  . . . . . . . . . . . . . . . . . .  14
     5.4.  AS-to-Client Response . . . . . . . . . . . . . . . . . .  14
   6.  Security Considerations . . . . . . . . . . . . . . . . . . .  15
   7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  15
   8.  Informative References  . . . . . . . . . . . . . . . . . . .  15
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  17

1.  Introduction

   For constrained IoT deployments [RFC7228] the overhead contributed by
   security protocols may be significant which motivates the
   specification of lightweight protocols that are optimizing, in