Assertion Values for a Resource Priority Header Claim in Support of Emergency Services Networks
draft-ietf-stir-rph-emergency-services-01
STIR M. Dolly
Internet-Draft AT&T
Intended status: Standards Track C. Wendt
Expires: September 10, 2020 Comcast
March 09, 2020
Assertion Values for a Resource Priority Header Claim in Support of
Emergency Services Networks
draft-ietf-stir-rph-emergency-services-01
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 September 10, 2020 [Page 1]
Internet-Draft RPH Values for Emergency Services March 2020
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 3
3. New Assertion Values . . . . . . . . . . . . . . . . . . . . 3
3.1. ESorig . . . . . . . . . . . . . . . . . . . . . . . . . 3
3.2. EScallback . . . . . . . . . . . . . . . . . . . . . . . 3
4. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 4
4.1. PASSporT Resource Priority Header (rph) Types . . . . . . 4
5. Security Considerations . . . . . . . . . . . . . . . . . . . 5
6. References . . . . . . . . . . . . . . . . . . . . . . . . . 5
6.1. Normative References . . . . . . . . . . . . . . . . . . 5
6.2. Informative References . . . . . . . . . . . . . . . . . 6
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
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