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
|
|
---|---|---|---|
Authors | Valery Smyslov , Paul Wouters | ||
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 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 . . . . . . . . . . . . . . . . . . . . . . . . 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-sidedShow full document text