CBOR Object Signing and Encryption (COSE): Headers for carrying and referencing X.509 certificates
draft-ietf-cose-x509-05
Network Working Group J. Schaad
Internet-Draft August Cellars
Intended status: Informational 4 November 2019
Expires: 7 May 2020
CBOR Object Signing and Encryption (COSE): Headers for carrying and
referencing X.509 certificates
draft-ietf-cose-x509-05
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 7 May 2020.
Schaad Expires 7 May 2020 [Page 1]
Internet-Draft COSE X.509 November 2019
Copyright Notice
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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. Requirements Terminology . . . . . . . . . . . . . . . . 3
2. X.509 COSE Headers . . . . . . . . . . . . . . . . . . . . . 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 . . . . . . . . . . . . . . . . . . . 7
6. References . . . . . . . . . . . . . . . . . . . . . . . . . 8
6.1. Normative References . . . . . . . . . . . . . . . . . . 8
6.2. Informative References . . . . . . . . . . . . . . . . . 8
Author's Address . . . . . . . . . . . . . . . . . . . . . . . . 9
1. Introduction
In the process of writing [RFC8152] discussions where held on the
question of X.509 certificates [RFC5280] and if there was a needed to
provide for them. At the time there were no use cases presented that
appeared to have a sufficient need for these attributes. Since that
time a number of cases where X.509 certificate support is necessary
have been defined. This document provides a set of attributes that
will allow applications to transport and refer to X.509 certificates
in a consistent manner.
Some of the constrained device situations are being used where an
X.509 PKI is already installed. One of these situations is the
6TiSCH environment for enrollment of devices where the certificates
are installed at the factory. 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
to establish session keys. A final scenario is the use of COSE as a
messaging application where long term existence of keys can be used
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along with a central authentication authority. The use of
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