CoAP Pub-Sub Profile for Authentication and Authorization for Constrained Environments (ACE)
draft-palombini-ace-coap-pubsub-profile-03

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ACE Working Group                                           F. Palombini
Internet-Draft                                                  Ericsson
Intended status: Standards Track                           June 27, 2018
Expires: December 29, 2018

     CoAP Pub-Sub Profile for Authentication and Authorization for
                     Constrained Environments (ACE)
               draft-palombini-ace-coap-pubsub-profile-03

Abstract

   This specification defines a profile for authentication and
   authorization for publishers and subscribers in a pub-sub setting
   scenario in a constrained environment, using the ACE framework.  This
   profile relies on transport layer or application layer security to
   authorize the publisher to the broker.  Moreover, it relies on
   application layer security for publisher-broker and subscriber-broker
   communication.

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
   Task Force (IETF).  Note that other groups may also distribute
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   and may be updated, replaced, or obsoleted by other documents at any
   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on December 29, 2018.

Copyright Notice

   Copyright (c) 2018 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
   to this document.  Code Components extracted from this document must

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   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  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Terminology . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Profile Overview  . . . . . . . . . . . . . . . . . . . . . .   3
   3.  coap_pubsub Profile . . . . . . . . . . . . . . . . . . . . .   4
     3.1.  Retrieval of COSE Key for protection of content . . . . .   5
   4.  Publisher . . . . . . . . . . . . . . . . . . . . . . . . . .   7
   5.  Subscriber  . . . . . . . . . . . . . . . . . . . . . . . . .   9
   6.  Pub-Sub Protected Communication . . . . . . . . . . . . . . .  11
     6.1.  Using COSE Objects to protect the resource representation  12
   7.  Security Considerations . . . . . . . . . . . . . . . . . . .  13
   8.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  14
   9.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  15
     9.1.  Normative References  . . . . . . . . . . . . . . . . . .  15
     9.2.  Informative References  . . . . . . . . . . . . . . . . .  15
   Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . .  16
   Author's Address  . . . . . . . . . . . . . . . . . . . . . . . .  16

1.  Introduction

   The publisher-subscriber setting allows for devices with limited
   reachability to communicate via a broker that enables store-and-
   forward messaging between the devices.  The pub-sub scenario using
   the Constrained Application Protocol (CoAP) is specified in
   [I-D.ietf-core-coap-pubsub].  This document defines a way to
   authorize nodes in a CoAP pub-sub type of setting, using the ACE
   framework [I-D.ietf-ace-oauth-authz].

1.1.  Terminology

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
   document are to be interpreted as described in RFC 2119 [RFC2119].

   Readers are expected to be familiar with the terms and concepts
   described in [I-D.ietf-ace-oauth-authz],
   [I-D.palombini-ace-key-groupcomm] and [I-D.ietf-core-coap-pubsub].
   In particular, analogously to [I-D.ietf-ace-oauth-authz], terminology
   for entities in the architecture such as Client (C), Resource Server
   (RS), and Authorization Server (AS) is defined in OAuth 2.0 [RFC6749]
   and [I-D.ietf-ace-actors], and terminology for entities such as the
   Key Distribution Center (KDC) and Dispatcher in
   [I-D.palombini-ace-key-groupcomm].

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