Assertion Values for a Resource Priority Header Claim and a SIP Priority Header Claim in Support of Emergency Services Networks
draft-ietf-stir-rph-emergency-services-07

Document Type Active Internet-Draft (stir WG)
Authors Martin Dolly  , Chris Wendt 
Last updated 2021-03-29 (latest revision 2021-03-11)
Replaces draft-dolly-stir-rph-emergency-services
Stream Internet Engineering Task Force (IETF)
Intended RFC status Proposed Standard
Formats plain text xml pdf htmlized (tools) htmlized bibtex
Reviews
Stream WG state Submitted to IESG for Publication (wg milestone: - Submit Assertion Val... )
Document shepherd Russ Housley
Shepherd write-up Show (last changed 2021-01-25)
IESG IESG state RFC Ed Queue
Action Holders
(None)
Consensus Boilerplate Yes
Telechat date
Responsible AD Murray Kucherawy
Send notices to housley@vigilsec.com
IANA IANA review state IANA OK - Actions Needed
IANA action state RFC-Ed-Ack
IANA expert review state Expert Reviews OK
RFC Editor RFC Editor state RFC-EDITOR
Details
STIR                                                            M. Dolly
Internet-Draft                                                      AT&T
Intended status: Standards Track                                C. Wendt
Expires: September 12, 2021                                      Comcast
                                                          March 11, 2021

Assertion Values for a Resource Priority Header Claim and a SIP Priority
         Header Claim in Support of Emergency Services Networks
               draft-ietf-stir-rph-emergency-services-07

Abstract

   This document adds new assertion values for a Resource Priority
   Header ("rph") claim and a new SIP Priority Header claim ("sph") for
   protection of the "psap-callback" value as part of the "rph" PASSporT
   extension, in support of the security of Emergency Services Networks
   for emergency call origination and callback.

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, 2021.

Copyright Notice

   Copyright (c) 2021 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

Dolly & Wendt          Expires September 12, 2021               [Page 1]
Internet-Draft      RPH Values for Emergency Services         March 2021

   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.  New Assertion Values for "rph" claim  . . . . . . . . . . . .   3
   4.  The SIP Priority header "sph" claim . . . . . . . . . . . . .   4
   5.  Order of Claim Keys . . . . . . . . . . . . . . . . . . . . .   5
   6.  Compact Form of PASSporT  . . . . . . . . . . . . . . . . . .   6
   7.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   6
   8.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   6
     8.1.  JSON Web Token claims . . . . . . . . . . . . . . . . . .   6
   9.  Security Considerations . . . . . . . . . . . . . . . . . . .   6
   10. References  . . . . . . . . . . . . . . . . . . . . . . . . .   6
     10.1.  Normative References . . . . . . . . . . . . . . . . . .   6
     10.2.  Informative References . . . . . . . . . . . . . . . . .   7
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   8

1.  Introduction

   Personal Assertion Token (PASSporT) Extension for Resource Priority
   Authorization [RFC8443] extended the Personal Assertion Token
   (PASSporT) specification defined in [RFC8225] to allow the inclusion
   of cryptographically signed assertions of authorization for the
   values populated in the Session Initiation Protocol (SIP) "Resource-
   Priority" header field [RFC4412].  [I-D.rosen-stir-emergency-calls]
   introduces the need and justification for the protection of both the
   SIP "Resource-Priority" and "Priority" header fields, used for
   categorizing the priority use of the call in the telephone network,
   specifically for emergency calls.

   Compromise of the SIP "Resource-Priority" or "Priority" header fields
   could lead to misuse of network resources (i.e., during congestion
   scenarios), impacting the application services supported using the
   SIP "Resource-Priority" header field and the handling of Public
   Saftey Answering Point (PSAP) callbacks.

   [RFC8225] allows extensions by which an authority on the originating
   side verifying the authorization of a particular communication for
   the SIP "Resource-Priority" header field or the SIP "Priority" header
   field can use PASSPorT claims to cryptographically sign the
   information associated with either the SIP "Resource-Priority" or
   "Priority" header field and convey assertion of those values by the
   signing party authorization.  A signed SIP "Resource-Priority" or
Show full document text