Algorithm Implementation Requirements and Usage Guidance for the Internet Key Exchange Protocol Version 2 (IKEv2)
RFC 8247
| Document | Type |
RFC - Proposed Standard
(September 2017; No errata)
Obsoletes RFC 4307
Updates RFC 7296
|
|
|---|---|---|---|
| Last updated | 2017-09-13 | ||
| Replaces | draft-nir-ipsecme-rfc4307bis | ||
| Stream | IETF | ||
| Formats | plain text html pdf htmlized bibtex | ||
| Reviews | |||
| Stream | WG state | Submitted to IESG for Publication | |
| Document shepherd | David Waltermire | ||
| Shepherd write-up | Show (last changed 2016-11-07) | ||
| IESG | IESG state | RFC 8247 (Proposed Standard) | |
| Consensus Boilerplate | Yes | ||
| Telechat date | |||
| Responsible AD | Eric Rescorla | ||
| Send notices to | "David Waltermire" <david.waltermire@nist.gov> | ||
| IANA | IANA review state | Version Changed - Review Needed | |
| IANA action state | RFC-Ed-Ack | ||
Internet Engineering Task Force (IETF) Y. Nir
Request for Comments: 8247 Dell EMC
Obsoletes: 4307 T. Kivinen
Updates: 7296
Category: Standards Track P. Wouters
ISSN: 2070-1721 Red Hat
D. Migault
Ericsson
September 2017
Algorithm Implementation Requirements and Usage Guidance
for the Internet Key Exchange Protocol Version 2 (IKEv2)
Abstract
The IPsec series of protocols makes use of various cryptographic
algorithms in order to provide security services. The Internet Key
Exchange (IKE) protocol is used to negotiate the IPsec Security
Association (IPsec SA) parameters, such as which algorithms should be
used. To ensure interoperability between different implementations,
it is necessary to specify a set of algorithm implementation
requirements and usage guidance to ensure that there is at least one
algorithm that all implementations support. This document updates
RFC 7296 and obsoletes RFC 4307 in defining the current algorithm
implementation requirements and usage guidance for IKEv2, and does
minor cleaning up of the IKEv2 IANA registry. This document does not
update the algorithms used for packet encryption using IPsec
Encapsulating Security Payload (ESP).
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/rfc8247.
Nir, et al. Standards Track [Page 1]
RFC 8247 IKEv2 Cryptographic Algorithms September 2017
Copyright Notice
Copyright (c) 2017 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
1.1. Conventions Used in This Document ..........................3
1.2. Updating Algorithm Implementation Requirements and
Usage Guidance .............................................4
1.3. Updating Algorithm Requirement Levels ......................4
1.4. Document Audience ..........................................5
2. Algorithm Selection .............................................5
2.1. Type 1 - IKEv2 Encryption Algorithm Transforms .............5
2.2. Type 2 - IKEv2 Pseudorandom Function Transforms ............7
2.3. Type 3 - IKEv2 Integrity Algorithm Transforms ..............8
2.4. Type 4 - IKEv2 Diffie-Hellman Group Transforms .............9
2.5. Summary of Changes from RFC 4307 ..........................11
3. IKEv2 Authentication ...........................................11
3.1. IKEv2 Authentication Method ...............................12
3.1.1. Recommendations for RSA Key Length .................13
3.2. Digital Signature Recommendations .........................13
4. Algorithms for Internet of Things ..............................14
5. Security Considerations ........................................15
6. IANA Considerations ............................................15
7. References .....................................................16
7.1. Normative References ......................................16
7.2. Informative References ....................................17
Acknowledgements ..................................................17
Authors' Addresses ................................................19
1. Introduction
The Internet Key Exchange (IKE) protocol [RFC7296] is used to
negotiate the parameters of the IPsec SA, such as the encryption and
authentication algorithms and the keys for the protected
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