CBOR Encoded Message Syntax (COSE): Headers for carrying and referencing X.509 certificates
draft-schaad-cose-x509-00

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Last updated 2016-11-22
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Network Working Group                                          J. Schaad
Internet-Draft                                            August Cellars
Intended status: Informational                         November 22, 2016
Expires: May 26, 2017

CBOR Encoded Message Syntax (COSE): Headers for carrying and referencing
                           X.509 certificates
                       draft-schaad-cose-x509-00

Abstract

   This document defines the headers and usage for referring to and
   transporting X.509 certificates in the CBOR Encoded Message (COSE)
   Syntax.

Contributing to this document

   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 http://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 May 26, 2017.

Copyright Notice

   Copyright (c) 2016 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

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Internet-Draft                 COSE X.509                  November 2016

   (http://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 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.  Requirements Terminology  . . . . . . . . . . . . . . . .   2
   2.  X.509 COSE Headers  . . . . . . . . . . . . . . . . . . . . .   3
   3.  Hash Algorithm Identifiers  . . . . . . . . . . . . . . . . .   5
     3.1.  SHA-2 256-bit Hash  . . . . . . . . . . . . . . . . . . .   5
   4.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   5
     4.1.  COSE Header Parameter Registry  . . . . . . . . . . . . .   5
     4.2.  COSE Algorithm Registry . . . . . . . . . . . . . . . . .   5
   5.  Security Considerations . . . . . . . . . . . . . . . . . . .   5
   6.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   5
     6.1.  Normative References  . . . . . . . . . . . . . . . . . .   5
     6.2.  Informative References  . . . . . . . . . . . . . . . . .   5
   Author's Address  . . . . . . . . . . . . . . . . . . . . . . . .   6

1.  Introduction

   In the process of writing RFCXXXX [I-D.ietf-cose-msg] discussions
   where held on the question of X.509 certificates [RFC5280]  and if
   there were needed.  At the time there were no use cases presented
   that appeared to hve a sufficient set of support to include these
   headers.  Since that time a number of cases where X.509 certificate
   support is necessary have been defined.  This document provides a set
   of headers that will allow applications to transport and refer to
   X.509 certificates in a consistent manner.

1.1.  Requirements Terminology

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

   When the words appear in lower case, their natural language meaning
   is used.

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2.  X.509 COSE Headers

   The use of X.509 certificates allows for an existing trust
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