PASSporT Extension for Resource-Priority Authorization
draft-ietf-stir-rph-03

Document Type Active Internet-Draft (stir WG)
Last updated 2018-04-06 (latest revision 2018-02-01)
Replaces draft-singh-stir-rph
Stream IETF
Intended RFC status Proposed Standard
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Stream WG state Submitted to IESG for Publication
Document shepherd Russ Housley
Shepherd write-up Show (last changed 2018-01-04)
IESG IESG state Waiting for Writeup
Consensus Boilerplate Yes
Telechat date On agenda of 2018-04-19 IESG telechat
Has a DISCUSS. Needs one more YES or NO OBJECTION position to pass.
Responsible AD Adam Roach
Send notices to Russ Housley <rhousley@vigilsec.com>
IANA IANA review state IANA - Not OK
IANA action state None
STIR                                                            R. Singh
Internet-Draft                                              Vencore Labs
Intended status: Standards Track                                M. Dolly
Expires: August 5, 2018                                             AT&T
                                                                  S. Das
                                                            Vencore Labs
                                                               A. Nguyen
                                   Office of Emergency Communication/DHS
                                                       February 01, 2018

         PASSporT Extension for Resource-Priority Authorization
                         draft-ietf-stir-rph-03

Abstract

   This document extends the Secure Telephone Identity Revisited (STIR)
   Personal Assertion Token (PASSporT) specification defined in
   [I-D.ietf-stir-passport] to allow the inclusion of cryptographically
   signed assertions of authorization for the values populated in the
   Session Initiation Protocol (SIP) 'Resource-Priority' header field,
   which is used for communications resource prioritization.

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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   Drafts is at https://datatracker.ietf.org/drafts/current/.

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   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 August 5, 2018.

Copyright Notice

   Copyright (c) 2018 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

Singh, et al.            Expires August 5, 2018                 [Page 1]
Internet-Draft                PASSporT-ext                 February 2018

   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
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  PASSporT 'rph' Claim  . . . . . . . . . . . . . . . . . . . .   3
   4.  'rph' in SIP  . . . . . . . . . . . . . . . . . . . . . . . .   5
     4.1.  Authentication Service Behavior . . . . . . . . . . . . .   5
     4.2.  Verification Service Behavior . . . . . . . . . . . . . .   5
   5.  Further Information Associated with 'Resource-Priority' . . .   6
   6.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   6
     6.1.  PASSporT Extension Claims Registration  . . . . . . . . .   6
     6.2.  'rph' Types . . . . . . . . . . . . . . . . . . . . . . .   7
   7.  Security Considerations . . . . . . . . . . . . . . . . . . .   7
     7.1.  Avoidance of replay and cut and paste attacks . . . . . .   7
     7.2.  Solution Considerations . . . . . . . . . . . . . . . . .   7
     7.3.  Acknowledgements  . . . . . . . . . . . . . . . . . . . .   8
   8.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   8
     8.1.  Normative References  . . . . . . . . . . . . . . . . . .   8
     8.2.  Informative References  . . . . . . . . . . . . . . . . .   9
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   9

1.  Introduction

   PASSporT [I-D.ietf-stir-passport] is a token format based on JSON Web
   Token (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 [RFC3261].  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
   communications Resource Priority.  As specified in [RFC4412], the
   'Resource-Priority' header field may be used by SIP user agents
   [RFC3261], including Public Switched Telephone Network (PSTN)
   gateways and terminals, and by SIP proxy servers, to influence
   prioritization afforded to communication sessions, including PSTN
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