PT-EAP: Posture Transport (PT) Protocol for Extensible Authentication Protocol (EAP) Tunnel Methods
RFC 7171
| Document | Type |
RFC - Proposed Standard
(May 2014; No errata)
Was draft-ietf-nea-pt-eap (nea WG)
|
|
|---|---|---|---|
| Last updated | 2015-10-14 | ||
| Replaces | draft-hanna-nea-pt-eap | ||
| Stream | IETF | ||
| Formats | plain text pdf html bibtex | ||
| Reviews | |||
| Stream | WG state | WG Document | |
| Document shepherd | No shepherd assigned | ||
| IESG | IESG state | RFC 7171 (Proposed Standard) | |
| Consensus Boilerplate | Unknown | ||
| Telechat date | |||
| Responsible AD | Stephen Farrell | ||
| IESG note | Susan Thomson (sethomso@cisco.com) is the Document Shepherd | ||
| Send notices to | (None) | ||
Internet Engineering Task Force (IETF) N. Cam-Winget
Request for Comments: 7171 Cisco Systems
Category: Standards Track P. Sangster
ISSN: 2070-1721 Symantec Corporation
May 2014
PT-EAP: Posture Transport (PT) Protocol
for Extensible Authentication Protocol (EAP) Tunnel Methods
Abstract
This document specifies PT-EAP, a Posture Transport (PT) protocol
based on the Extensible Authentication Protocol (EAP) and designed to
be used only inside an EAP tunnel method protected by Transport Layer
Security (TLS). The document also describes the intended
applicability of PT-EAP.
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 5741.
Information about the current status of this document, any errata,
and how to provide feedback on it may be obtained at
http://www.rfc-editor.org/info/rfc7171.
Copyright Notice
Copyright (c) 2014 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
(http://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.
Cam-Winget & Sangster Standards Track [Page 1]
RFC 7171 NEA PT-EAP May 2014
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
1.1. Prerequisites . . . . . . . . . . . . . . . . . . . . . . 3
1.2. Message Diagram Conventions . . . . . . . . . . . . . . . 3
1.3. Terminology . . . . . . . . . . . . . . . . . . . . . . . 3
1.4. Conventions Used in This Document . . . . . . . . . . . . 4
1.5. Compatibility with Other Specifications . . . . . . . . . 4
2. Use of PT-EAP . . . . . . . . . . . . . . . . . . . . . . . . 4
3. Definition of PT-EAP . . . . . . . . . . . . . . . . . . . . 4
3.1. Protocol Overview . . . . . . . . . . . . . . . . . . . . 5
3.2. Version Negotiation . . . . . . . . . . . . . . . . . . . 6
3.3. PT-EAP Message Format . . . . . . . . . . . . . . . . . . 6
3.4. Preventing MITM Attacks with Channel Bindings . . . . . . 8
4. Security Considerations . . . . . . . . . . . . . . . . . . . 9
4.1. Trust Relationships . . . . . . . . . . . . . . . . . . . 9
4.1.1. Posture Transport Client . . . . . . . . . . . . . . 9
4.1.2. Posture Transport Server . . . . . . . . . . . . . . 10
4.2. Threats and Countermeasures . . . . . . . . . . . . . . . 10
4.2.1. Message Confidentiality . . . . . . . . . . . . . . . 11
4.2.2. Message Fabrication . . . . . . . . . . . . . . . . . 11
4.2.3. Message Modification . . . . . . . . . . . . . . . . 12
4.2.4. Denial of Service . . . . . . . . . . . . . . . . . . 12
4.2.5. NEA Asokan Attacks . . . . . . . . . . . . . . . . . 13
4.3. Candidate EAP Tunnel Method Protections . . . . . . . . . 13
4.4. Security Claims for PT-EAP as per RFC 3748 . . . . . . . 14
5. Requirements for EAP Tunnel Methods . . . . . . . . . . . . . 14
6. Privacy Considerations . . . . . . . . . . . . . . . . . . . 16
7. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 16
7.1. Registry for PT-EAP Versions . . . . . . . . . . . . . . 17
8. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 17
9. References . . . . . . . . . . . . . . . . . . . . . . . . . 18
9.1. Normative References . . . . . . . . . . . . . . . . . . 18
9.2. Informative References . . . . . . . . . . . . . . . . . 18
1. Introduction
This document specifies PT-EAP, a Posture Transport (PT) protocol
protected by a TLS-protected EAP tunnel method. The PT protocol in
the Network Endpoint Assessment (NEA) architecture is responsible for
transporting Posture Broker (PB-TNC [RFC5793]) batches, often
containing Posture Attributes (PA-TNC [RFC5792]), across the network
between the NEA Client and NEA Server. The PT-EAP protocol must be
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