Assertion Values for a Resource Priority Header Claim in Support of Emergency Services Networks
draft-dolly-stir-rph-emergency-services-00

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STIR                                                            M. Dolly
Internet-Draft                                                      AT&T
Intended status: Standards Track                                C. Wendt
Expires: May 6, 2020                                             Comcast
                                                       November 03, 2019

  Assertion Values for a Resource Priority Header Claim in Support of
                      Emergency Services Networks
               draft-dolly-stir-rph-emergency-services-00

Abstract

   This document adds new assertion values for a Resource Priority
   Header ("rph") claim defined in RFC 8443, in support of Emergency
   Services Networks for emergency call origination and callback.

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Dolly & Wendt              Expires May 6, 2020                  [Page 1]
Internet-Draft      RPH Values for Emergency Services      November 2019

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  New Assertion Values  . . . . . . . . . . . . . . . . . . . .   3
   4.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   4
     4.1.  PASSporT Resource Priority Header (rph) Types . . . . . .   4
   5.  Security Considerations . . . . . . . . . . . . . . . . . . .   4
   6.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   4
     6.1.  Normative References  . . . . . . . . . . . . . . . . . .   4
     6.2.  Informative References  . . . . . . . . . . . . . . . . .   5
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   6

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, which is used for communications resource
   prioritization.

   Compromise of the SIP 'Resource-Priority' header field [RFC4412]
   could lead to misuse of network resources (i.e., during congestion
   scenarios), impacting the application services supported using the
   SIP 'Resource-Priority' header field.

   [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 can use a PASSPorT claim to
   cryptographically sign the SIP 'Resource-Priority' header field and
   convey assertion of the authorization for the SIP 'Resource-Priority'
   header field.  A signed SIP 'Resource-Priority' header field will
   allow a receiving entity (including entities located in different
   network domains/boundaries) to verify the validity of assertions
   authorizing the SIP 'Resource-Priority' header field and to act on
   the information with confidence that the information has not been
   spoofed or compromised.

   This document adds new assertion values for a Resource Priority
   Header ("rph") claim defined in [RFC8443], in support of Emergency
   Services Networks for emergency call origination and callback.  How
   these new assertion values for real-time communications supported
   using the SIP 'Resource-Priority' header field is outside the scope
   of this document.  In addition, the PASSPorT extension defined in
   this document is intended for use in environments where there are

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