Generic Raw Public-Key Support for IKEv2
RFC 7670

Document Type RFC - Proposed Standard (January 2016; No errata)
Updates RFC 7296
Last updated 2016-01-20
Stream IETF
Formats plain text pdf html bibtex
Stream WG state Submitted to IESG for Publication
Document shepherd Yaron Sheffer
Shepherd write-up Show (last changed 2015-04-21)
IESG IESG state RFC 7670 (Proposed Standard)
Consensus Boilerplate Yes
Telechat date
Responsible AD Kathleen Moriarty
Send notices to (None)
IANA IANA review state Version Changed - Review Needed
IANA action state RFC-Ed-Ack
Internet Engineering Task Force (IETF)                        T. Kivinen
Request for Comments: 7670                                 INSIDE Secure
Updates: 7296                                                 P. Wouters
Category: Standards Track                                        Red Hat
ISSN: 2070-1721                                            H. Tschofenig
                                                            January 2016

                Generic Raw Public-Key Support for IKEv2

Abstract

   The Internet Key Exchange Version 2 (IKEv2) protocol did have support
   for raw public keys, but it only supported RSA raw public keys.  In
   constrained environments, it is useful to make use of other types of
   public keys, such as those based on Elliptic Curve Cryptography.
   This document updates RFC 7296, adding support for other types of raw
   public keys to IKEv2.

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/rfc7670.

Copyright Notice

   Copyright (c) 2016 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.

Kivinen, et al.              Standards Track                    [Page 1]
RFC 7670        Generic Raw Public-Key Support for IKEv2    January 2016

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  Certificate Encoding Payload  . . . . . . . . . . . . . . . .   3
   4.  Security Considerations . . . . . . . . . . . . . . . . . . .   4
   5.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   5
   6.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   5
     6.1.  Normative References  . . . . . . . . . . . . . . . . . .   5
     6.2.  Informative References  . . . . . . . . . . . . . . . . .   5
   Appendix A.  Examples . . . . . . . . . . . . . . . . . . . . . .   7
     A.1.  ECDSA Example . . . . . . . . . . . . . . . . . . . . . .   7
     A.2.  RSA Example . . . . . . . . . . . . . . . . . . . . . . .   8
   Acknowledgements  . . . . . . . . . . . . . . . . . . . . . . . .  10
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  10

1.  Introduction

   This document replaces an algorithm-specific version of raw public
   keys of the Internet Key Exchange Version 2 (IKEv2) [RFC7296] with a
   generic version of raw public keys that is algorithm agnostic.

   In [RFC5996], IKEv2 had support for PKCS #1 encoded RSA keys, i.e., a
   DER-encoded RSAPublicKey structure (see [RSA] and [RFC3447]).  Other
   raw public-key types are, however, not supported.  In [RFC7296], this
   feature was removed; this document reintroduces support for raw
   public keys to IKEv2 in a more generic way.

   DNSSEC allows public keys to be associated with domain names for
   usage with security protocols like IKEv2 and Transport Layer Security
   (TLS) [RFC5246] but it relies on extensions in those protocols to be
   specified.

   The Raw Public Keys in Transport Layer Security specification
   ([RFC7250]) adds generic support for raw public keys to TLS by
   reusing the SubjectPublicKeyInfo format from the X.509 Public-Key
   Infrastructure Certificate profile [RFC5280].

   This document is similar to the Raw Public Keys in Transport Layer
   Security specification and applies the concept to IKEv2 to support
   all public-key formats defined by PKIX.  This approach also allows
   future public-key extensions to be supported without the need to
   introduce further enhancements to IKEv2.

Kivinen, et al.              Standards Track                    [Page 2]
RFC 7670        Generic Raw Public-Key Support for IKEv2    January 2016
Show full document text