Authorization for the Internet of Things using OAuth 2.0
draft-ietf-ace-oauth-authz-00

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ACE Working Group                                               L. Seitz
Internet-Draft                                                      SICS
Intended status: Standards Track                             G. Selander
Expires: June 23, 2016                                          Ericsson
                                                           E. Wahlstroem
                                                              S. Erdtman
                                                        Nexus Technology
                                                           H. Tschofenig
                                                                ARM Ltd.
                                                       December 21, 2015

        Authorization for the Internet of Things using OAuth 2.0
                     draft-ietf-ace-oauth-authz-00

Abstract

   This memo defines how to use OAuth 2.0 as an authorization framework
   with Internet of Things (IoT) deployments, thus bringing a well-known
   and widely used security solution to IoT devices.  Where possible
   vanilla OAuth 2.0 is used, but where the limitations of IoT devices
   require it, profiles and extensions are provided.

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 June 23, 2016.

Copyright Notice

   Copyright (c) 2015 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
   (http://trustee.ietf.org/license-info) in effect on the date of

Seitz, et al.             Expires June 23, 2016                 [Page 1]
Internet-Draft         OAuth 2.0 IoT Authorization         December 2015

   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
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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.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  Overview  . . . . . . . . . . . . . . . . . . . . . . . . . .   4
     3.1.  OAuth 2.0 . . . . . . . . . . . . . . . . . . . . . . . .   5
     3.2.  CoAP  . . . . . . . . . . . . . . . . . . . . . . . . . .   7
     3.3.  Object Security . . . . . . . . . . . . . . . . . . . . .   8
   4.  Protocol Interactions . . . . . . . . . . . . . . . . . . . .   8
   5.  OAuth 2.0 Profiling . . . . . . . . . . . . . . . . . . . . .  12
     5.1.  Communication Security Protocol . . . . . . . . . . . . .  12
     5.2.  Authorization Information Resource at the Resource Server  13
     5.3.  Authorization Information Format  . . . . . . . . . . . .  13
     5.4.  CBOR Data Formats . . . . . . . . . . . . . . . . . . . .  13
   6.  Deployment Scenarios  . . . . . . . . . . . . . . . . . . . .  13
     6.1.  Client and Resource Server are Offline  . . . . . . . . .  14
     6.2.  Resource Server Offline . . . . . . . . . . . . . . . . .  17
     6.3.  Token Introspection with an Offline Client  . . . . . . .  21
     6.4.  Always-On Connectivity  . . . . . . . . . . . . . . . . .  25
     6.5.  Token-less Authorization  . . . . . . . . . . . . . . . .  26
     6.6.  Securing Group Communication  . . . . . . . . . . . . . .  29
   7.  Security Considerations . . . . . . . . . . . . . . . . . . .  30
   8.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  30
   9.  Acknowledgments . . . . . . . . . . . . . . . . . . . . . . .  30
   10. References  . . . . . . . . . . . . . . . . . . . . . . . . .  30
     10.1.  Normative References . . . . . . . . . . . . . . . . . .  30
     10.2.  Informative References . . . . . . . . . . . . . . . . .  32
   Appendix A.  Design Justification . . . . . . . . . . . . . . . .  33
   Appendix B.  Optimizations  . . . . . . . . . . . . . . . . . . .  35
   Appendix C.  CoAP and CBOR profiles for OAuth 2.0 . . . . . . . .  36
     C.1.  Profile for Token resource  . . . . . . . . . . . . . . .  36
       C.1.1.  Token Request . . . . . . . . . . . . . . . . . . . .  36
       C.1.2.  Token Response  . . . . . . . . . . . . . . . . . . .  38
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