Using CBOR Web Tokens (CWTs) in Transport Layer Security (TLS) and Datagram Transport Layer Security (DTLS)
draft-tschofenig-tls-cwt-00

• Status
• IESG evaluation record
• IESG writeups
• Email expansions
• History

• Versions
• 00

TLS                                                        H. Tschofenig
Internet-Draft                                               M. Brossard
Intended status: Standards Track                             Arm Limited
Expires: September 12, 2019                               March 11, 2019

   Using CBOR Web Tokens (CWTs) in Transport Layer Security (TLS) and
                Datagram Transport Layer Security (DTLS)
                      draft-tschofenig-tls-cwt-00

Abstract

   The TLS protocol supports different credentials, including pre-shared
   keys, raw public keys, and X.509 certificates.  For use with public
   key cryptography developers have to decide between raw public keys,
   which require out-of-band agreement and full-fletched X.509
   certificates.  For devices where the reduction of code size is
   important it is desirable to minimize the use of X.509-related
   libraries.  With the CBOR Web Token (CWT) a structure has been
   defined that allows CBOR-encoded claims to be protected with CBOR
   Object Signing and Encryption (COSE).

   This document registers a new value to the "TLS Certificate Types"
   subregistry to allow TLS and DTLS to use CWTs.  Conceptually, CWTs
   can be seen as a certificate format (when with public key
   cryptography) or a Kerberos ticket (when used with symmetric key
   cryptography).

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 September 12, 2019.

Tschofenig & Brossard  Expires September 12, 2019               [Page 1]
Internet-Draft              CWTs in TLS/DTLS                  March 2019

Copyright Notice

   Copyright (c) 2019 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 as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

   This document may contain material from IETF Documents or IETF
   Contributions published or made publicly available before November
   10, 2008.  The person(s) controlling the copyright in some of this
   material may not have granted the IETF Trust the right to allow
   modifications of such material outside the IETF Standards Process.
   Without obtaining an adequate license from the person(s) controlling
   the copyright in such materials, this document may not be modified
   outside the IETF Standards Process, and derivative works of it may
   not be created outside the IETF Standards Process, except to format
   it for publication as an RFC or to translate it into languages other
   than English.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Conventions and Terminology . . . . . . . . . . . . . . . . .   3
   3.  The CWT Certificate Type  . . . . . . . . . . . . . . . . . .   3
   4.  Representation and Verification the Identity of Application
       Services  . . . . . . . . . . . . . . . . . . . . . . . . . .   4
   5.  Security and Privacy Considerations . . . . . . . . . . . . .   5
   6.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   5
   7.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   5
     7.1.  Normative References  . . . . . . . . . . . . . . . . . .   5
     7.2.  Informative References  . . . . . . . . . . . . . . . . .   6
   Appendix A.  History  . . . . . . . . . . . . . . . . . . . . . .   8
   Appendix B.  Working Group Information  . . . . . . . . . . . . .   8
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   8

1.  Introduction

   The CBOR Web Token (CWT) [RFC8392] was defined as the CBOR-based
   version of the JSON Web Token (JWT) [RFC7519].  JWT is used
   extensibly on Web application and for use with Internet of Things

Tschofenig & Brossard  Expires September 12, 2019               [Page 2]
Internet-Draft              CWTs in TLS/DTLS                  March 2019

   environments the believe is that a more lightweight encoding, namely