Personal Assertion Token (PASSporT) Extension for Resource Priority Authorization
RFC 8443
| Document | Type |
RFC - Proposed Standard
(August 2018; No errata)
Was draft-ietf-stir-rph (stir WG)
|
|
|---|---|---|---|
| Last updated | 2018-08-31 | ||
| Replaces | draft-singh-stir-rph | ||
| Stream | IETF | ||
| Formats | plain text pdf html bibtex | ||
| Reviews | |||
| Stream | WG state | Submitted to IESG for Publication | |
| Document shepherd | Russ Housley | ||
| Shepherd write-up | Show (last changed 2018-01-04) | ||
| IESG | IESG state | RFC 8443 (Proposed Standard) | |
| Consensus Boilerplate | Yes | ||
| Telechat date | |||
| Responsible AD | Adam Roach | ||
| Send notices to | Russ Housley <housley@vigilsec.com> | ||
| IANA | IANA review state | Version Changed - Review Needed | |
| IANA action state | RFC-Ed-Ack | ||
Internet Engineering Task Force (IETF) R. Singh
Request for Comments: 8443 Vencore Labs
Category: Standards Track M. Dolly
ISSN: 2070-1721 AT&T
S. Das
Vencore Labs
A. Nguyen
Office of Emergency Communications/DHS
August 2018
Personal Assertion Token (PASSporT) Extension
for Resource Priority Authorization
Abstract
This document extends the Personal Assertion Token (PASSporT)
specification defined in RFC 8225 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 is an Internet Standards Track document.
This document is a product of the Internet Engineering Task Force
(IETF). It represents the consensus of the IETF community. It has
received public review and has been approved for publication by the
Internet Engineering Steering Group (IESG). Further information on
Internet Standards is available in Section 2 of RFC 7841.
Information about the current status of this document, any errata,
and how to provide feedback on it may be obtained at
https://www.rfc-editor.org/info/rfc8443.
Singh, et al. Standards Track [Page 1]
RFC 8443 PASSporT-ext August 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
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 . . . . . . . . . . . . . . . . . . . . . . . . . 4
3. PASSporT "rph" Claim . . . . . . . . . . . . . . . . . . . . 4
4. "rph" in SIP . . . . . . . . . . . . . . . . . . . . . . . . 5
4.1. Authentication Service Behavior . . . . . . . . . . . . . 5
4.2. Verification Service Behavior . . . . . . . . . . . . . . 6
5. Further Information Associated with the SIP
'Resource-Priority' Header Field . . . . . . . . . . . . . . 7
6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 7
6.1. JSON Web Token Claims . . . . . . . . . . . . . . . . . . 7
6.2. PASSporT Types . . . . . . . . . . . . . . . . . . . . . 7
7. Security Considerations . . . . . . . . . . . . . . . . . . . 8
7.1. Avoidance of Replay and Cut-and-Paste Attacks . . . . . . 8
7.2. Solution Considerations . . . . . . . . . . . . . . . . . 8
8. References . . . . . . . . . . . . . . . . . . . . . . . . . 8
8.1. Normative References . . . . . . . . . . . . . . . . . . 8
8.2. Informative References . . . . . . . . . . . . . . . . . 9
Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . . 10
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 10
1. Introduction
PASSporT [RFC8225] is a token format based on JSON Web Token (JWT)
[RFC7519] for conveying cryptographically signed information about
the identities involved in personal communications. PASSporT with
Secure Telephone Identity Revisited (STIR) [RFC8224] provides a
mechanism by which an authority on the originating side of a call,
using a protocol like SIP [RFC3261], can provide a cryptographic
assurance of the validity of the calling party telephone number in
order to prevent impersonation attacks.
Singh, et al. Standards Track [Page 2]
RFC 8443 PASSporT-ext August 2018
[RFC4412] defines a mechanism to prioritize access to SIP-signaled
resources during periods of communications resource scarcity using
the SIP 'Resource-Priority' header. As specified in [RFC4412], the
SIP 'Resource-Priority' header field may be used by SIP user agents
(UAs) [RFC3261] (including Public Switched Telephone Network (PSTN)
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