PASSporT Extension for Resource-Priority Authorization
draft-ietf-stir-rph-01

Document Type Active Internet-Draft (stir WG)
Last updated 2017-09-14
Replaces draft-singh-stir-rph
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STIR                                                            R. Singh
Internet-Draft                                              Vencore Labs
Intended status: Standards Track                                M. Dolly
Expires: March 18, 2018                                             AT&T
                                                                  S. Das
                                                            Vencore Labs
                                                               A. Nguyen
                                   Office of Emergency Communication/DHS
                                                      September 14, 2017

         PASSporT Extension for Resource-Priority Authorization
                         draft-ietf-stir-rph-01

Abstract

   This document extends the PASSporT object to convey
   cryptographically-signed assertions of authorization for
   communications 'Resource-Priority'.  It extends PASSporT to allow
   cryptographic-signing of the SIP 'Resource-Priority" header field
   which is used for communications resource prioritization.  It also
   describes how the PASSPorT extension is used in SIP signaling to
   convey assertions of authorization of the information in the SIP
   'Resource-Priority' header field.

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
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   This Internet-Draft will expire on March 18, 2018.

Copyright Notice

   Copyright (c) 2017 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

Singh, et al.            Expires March 18, 2018                 [Page 1]
Internet-Draft                PASSporT-ext                September 2017

   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
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   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  PASSporT 'rph' Claim  . . . . . . . . . . . . . . . . . . . .   3
   4.  'rph' in SIP  . . . . . . . . . . . . . . . . . . . . . . . .   4
     4.1.  Authentication Service Behavior . . . . . . . . . . . . .   4
     4.2.  Verification Service Behavior . . . . . . . . . . . . . .   5
   5.  Further Information Associated with Resource-Priority . . . .   6
   6.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   6
     6.1.  JSON Web Token Claims Registration  . . . . . . . . . . .   6
     6.2.  PASSporT 'rph' Types  . . . . . . . . . . . . . . . . . .   6
   7.  Security Considerations . . . . . . . . . . . . . . . . . . .   7
     7.1.  Avoidance of replay and cut and past attacks  . . . . . .   7
     7.2.  Solution Considerations . . . . . . . . . . . . . . . . .   7
     7.3.  Acknowledgements  . . . . . . . . . . . . . . . . . . . .   7
   8.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   7
     8.1.  Normative References  . . . . . . . . . . . . . . . . . .   8
     8.2.  Informative References  . . . . . . . . . . . . . . . . .   8
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   8

1.  Introduction

   PASSporT [I-D.ietf-stir-passport] is a token format based on JWT
   [RFC7519] for conveying cryptographically-signed information about
   the identities involved in personal communications; it is used with
   STIR [I-D.ietf-stir-rfc4474bis] to convey a signed assertion of the
   identity of the participants in real-time communications established
   via a protocol like SIP.  This specification extends PASSporT to
   allow cryptographic-signing of the SIP 'Resource-Priority' header
   field defined in [RFC4412].

   [RFC4412] defines the SIP 'Resource-Priority' header field for
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