CBOR Object Signing and Encryption (COSE): Header parameters for carrying and referencing X.509 certificates
draft-ietf-cose-x509-06

Document Type Active Internet-Draft (cose WG)
Last updated 2020-03-09
Replaces draft-schaad-cose-x509
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Network Working Group                                          J. Schaad
Internet-Draft                                            August Cellars
Intended status: Informational                              9 March 2020
Expires: 10 September 2020

    CBOR Object Signing and Encryption (COSE): Header parameters for
              carrying and referencing X.509 certificates
                        draft-ietf-cose-x509-06

Abstract

   The CBOR Signing And Encrypted Message (COSE) structure uses
   references to keys in general.  For some algorithms, additional
   properties are defined which carry parts of keys as needed.  The COSE
   Key structure is used for transporting keys outside of COSE messages.
   This document extends the way that keys can be identified and
   transported by providing attributes that refer to or contain X.509
   certificates.

Contributing to this document

   This note is to be removed before publishing as an RFC.

   The source for this draft is being maintained in GitHub.  Suggested
   changes should be submitted as pull requests at https://github.com/
   cose-wg/X509.  Instructions are on that page as well.  Editorial
   changes can be managed in GitHub, but any substantial issues need to
   be discussed on the COSE mailing list.

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
   working documents as Internet-Drafts.  The list of current Internet-
   Drafts is at https://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
   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 10 September 2020.

Schaad                  Expires 10 September 2020               [Page 1]
Internet-Draft                 COSE X.509                     March 2020

Copyright Notice

   Copyright (c) 2020 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 include Simplified BSD License text
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   provided without warranty as described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Requirements Terminology  . . . . . . . . . . . . . . . .   3
   2.  X.509 COSE Header Parameters  . . . . . . . . . . . . . . . .   3
   3.  X.509 certificates and static-static ECDH . . . . . . . . . .   6
   4.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   7
     4.1.  COSE Header Parameter Registry  . . . . . . . . . . . . .   7
     4.2.  COSE Header Algorithm Parameter Registry  . . . . . . . .   7
   5.  Security Considerations . . . . . . . . . . . . . . . . . . .   8
   6.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   8
     6.1.  Normative References  . . . . . . . . . . . . . . . . . .   8
     6.2.  Informative References  . . . . . . . . . . . . . . . . .   9
   Author's Address  . . . . . . . . . . . . . . . . . . . . . . . .  10

1.  Introduction

   In the process of writing [RFC8152] discussions were held on the
   question of X.509 certificates [RFC5280] and if there was a needed to
   provide for them.  At the time no use cases were presented that
   appeared to have a sufficient need for these attributes.  Since that
   time a number of cases have been defined in which X.509 certificate
   support is necessary, and by implication, applications will need a
   documented and consistent way to handle such certificates.  This
   document defines a set of attributes that will allow applications to
   transport and refer to X.509 certificates in a consistent manner.

   In some of these cases, a constrained device is being deployed in the
   context of an existing X.509 PKI: for example, in the 6TiSCH
   environment [I-D.richardson-enrollment-roadmap], describes a device
   enrollment solution that relies on the presence in the device of a
   factory-installed certificate.  The [I-D.selander-ace-cose-ecdhe]
   draft was also written with the idea that long term certificates
   could be used to provide for authentication of devices, and uses them

Schaad                  Expires 10 September 2020               [Page 2]
Internet-Draft                 COSE X.509                     March 2020
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