The NULL Authentication Method in the Internet Key Exchange Protocol Version 2 (IKEv2)
RFC 7619
| Document | Type |
RFC - Proposed Standard
(August 2015; No errata)
Updates RFC 4301
|
|
|---|---|---|---|
| Last updated | 2015-10-14 | ||
| Stream | IETF | ||
| Formats | plain text html pdf htmlized bibtex | ||
| Reviews | |||
| Stream | WG state | Submitted to IESG for Publication | |
| Document shepherd | Paul Hoffman | ||
| Shepherd write-up | Show (last changed 2015-05-13) | ||
| IESG | IESG state | RFC 7619 (Proposed Standard) | |
| Consensus Boilerplate | Yes | ||
| Telechat date | |||
| Responsible AD | Kathleen Moriarty | ||
| Send notices to | (None) | ||
| IANA | IANA review state | IANA OK - Actions Needed | |
| IANA action state | RFC-Ed-Ack | ||
Internet Engineering Task Force (IETF) V. Smyslov
Request for Comments: 7619 ELVIS-PLUS
Updates: 4301 P. Wouters
Category: Standards Track Red Hat
ISSN: 2070-1721 August 2015
The NULL Authentication Method
in the Internet Key Exchange Protocol Version 2 (IKEv2)
Abstract
This document specifies the NULL Authentication method and the
ID_NULL Identification Payload ID Type for Internet Key Exchange
Protocol version 2 (IKEv2). This allows two IKE peers to establish
single-side authenticated or mutual unauthenticated IKE sessions for
those use cases where a peer is unwilling or unable to authenticate
or identify itself. This ensures IKEv2 can be used for Opportunistic
Security (also known as Opportunistic Encryption) to defend against
Pervasive Monitoring attacks without the need to sacrifice anonymity.
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/rfc7619.
Smyslov & Wouters Standards Track [Page 1]
RFC 7619 NULL Auth in IKEv2 August 2015
Copyright Notice
Copyright (c) 2015 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
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the Trust Legal Provisions and are provided without warranty as
described in the Simplified BSD License.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1. Conventions Used in This Document . . . . . . . . . . . . 4
2. Using the NULL Authentication Method . . . . . . . . . . . . 4
2.1. Authentication Payload . . . . . . . . . . . . . . . . . 4
2.2. Identification Payload . . . . . . . . . . . . . . . . . 4
2.3. INITIAL_CONTACT Notification . . . . . . . . . . . . . . 5
2.4. Interaction with the Peer Authorization Database (PAD) . 5
2.5. Traffic Selectors . . . . . . . . . . . . . . . . . . . . 6
3. Security Considerations . . . . . . . . . . . . . . . . . . . 7
3.1. Audit Trail and Peer Identification . . . . . . . . . . . 7
3.2. Resource Management and Robustness . . . . . . . . . . . 8
3.3. IKE Configuration Selection . . . . . . . . . . . . . . . 8
3.4. Networking Topology Changes . . . . . . . . . . . . . . . 8
4. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 9
5. References . . . . . . . . . . . . . . . . . . . . . . . . . 9
5.1. Normative References . . . . . . . . . . . . . . . . . . 9
5.2. Informative References . . . . . . . . . . . . . . . . . 9
Appendix A. Update of PAD processing in RFC 4301 . . . . . . . . 11
Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . . 12
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 12
Smyslov & Wouters Standards Track [Page 2]
RFC 7619 NULL Auth in IKEv2 August 2015
1. Introduction
Internet Key Exchange Protocol version 2 (IKEv2), specified in
[RFC7296], provides a way for two parties to perform an authenticated
key exchange. While the authentication methods used by the peers can
be different, there is no method for one or both parties to remain
unauthenticated and anonymous. This document extends the
authentication methods to support unauthenticated and anonymous IKE
sessions.
In some situations, mutual authentication is undesirable,
superfluous, or impossible. The following three examples illustrate
these unauthenticated use cases:
o A user wants to establish an anonymous secure connection to a
server. In this situation, the user should be able to
authenticate the server without presenting or authenticating to
the server with their own identity. This case uses a single-sided
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