CBOR Object Signing and Encryption (COSE): Header parameters for carrying and referencing X.509 certificates
draft-ietf-cose-x509-07
Network Working Group J. Schaad
Internet-Draft August Cellars
Intended status: Informational 17 September 2020
Expires: 21 March 2021
CBOR Object Signing and Encryption (COSE): Header parameters for
carrying and referencing X.509 certificates
draft-ietf-cose-x509-07
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
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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 21 March 2021.
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Copyright Notice
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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 . . . . . . . . . . 7
4. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 8
4.1. COSE Header Parameter Registry . . . . . . . . . . . . . 8
4.2. COSE Header Algorithm Parameter Registry . . . . . . . . 8
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] the working group discussed X.509
certificates [RFC5280] ad decided that no use cases wher prestented
that showed a need to support certificates. 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
to establish session keys. A third scenario is the use of COSE as
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