OSCORE profile of the Authentication and Authorization for Constrained Environments Framework
draft-ietf-ace-oscore-profile-00

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ACE Working Group                                               L. Seitz
Internet-Draft                                              RISE SICS AB
Intended status: Standards Track                            F. Palombini
Expires: June 15, 2018                                       Ericsson AB
                                                           M. Gunnarsson
                                                            RISE SICS AB
                                                       December 12, 2017

 OSCORE profile of the Authentication and Authorization for Constrained
                         Environments Framework
                    draft-ietf-ace-oscore-profile-00

Abstract

   This memo specifies a profile for the Authentication and
   Authorization for Constrained Environments (ACE) framework.  It
   utilizes Object Security for Constrained RESTful Environments
   (OSCORE) to provide communication security, server authentication,
   and proof-of-possession for a key owned by the client and bound to an
   OAuth 2.0 access token.

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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   Drafts is at https://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
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   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 June 15, 2018.

Copyright Notice

   Copyright (c) 2017 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

Seitz, et al.             Expires June 15, 2018                 [Page 1]
Internet-Draft            OSCORE Profile of ACE            December 2017

   carefully, as they describe your rights and restrictions with respect
   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
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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Terminology . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Client to Resource Server . . . . . . . . . . . . . . . . . .   3
     2.1.  Signaling the use of OSCORE . . . . . . . . . . . . . . .   3
     2.2.  Key establishment for OSCORE  . . . . . . . . . . . . . .   4
   3.  Client to Authorization Server  . . . . . . . . . . . . . . .   6
   4.  Resource Server to Authorization Server . . . . . . . . . . .   7
   5.  Security Considerations . . . . . . . . . . . . . . . . . . .   7
   6.  Privacy Considerations  . . . . . . . . . . . . . . . . . . .   7
   7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   7
   8.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   7
     8.1.  Normative References  . . . . . . . . . . . . . . . . . .   7
     8.2.  Informative References  . . . . . . . . . . . . . . . . .   8
   Appendix A.  Profile Requirements . . . . . . . . . . . . . . . .   9
   Appendix B.  Using the pop-key with EDHOC (EDHOC+OSCORE)  . . . .  10
     B.1.  Using Asymmetric Keys . . . . . . . . . . . . . . . . . .  10
     B.2.  Using Symmetric Keys  . . . . . . . . . . . . . . . . . .  12
     B.3.  Processing  . . . . . . . . . . . . . . . . . . . . . . .  13
   Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . .  15
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  16

1.  Introduction

   This memo specifies a profile of the ACE framework
   [I-D.ietf-ace-oauth-authz].  In this profile, a client and a resource
   server use CoAP [RFC7252] to communicate.  The client uses an access
   token, bound to a key (the proof-of-possession key) to authorize its
   access to the resource server.  In order to provide communication
   security, proof of possession, and server authentication they use
   Object Security for Constrained RESTful Environments (OSCORE)
   [I-D.ietf-core-object-security].  Optionally the client and the
   resource server may also use CoAP and OSCORE to communicate with the
   authorization server.

   OSCORE specifies how to use CBOR Object Signing and Encryption (COSE)
   [RFC8152] to secure CoAP messages.  In order to provide replay and
   reordering protection OSCORE also introduces sequence numbers that
   are used together with COSE.