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More Raw Public Keys for IKEv2
draft-kivinen-ipsecme-oob-pubkey-05

Document type: Active Internet-Draft (individual)
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Last updated: 2013-10-18
Intended RFC status: Unknown
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IP Security Maintenance and Extensions                        T. Kivinen
(ipsecme)                                                  INSIDE Secure
Internet-Draft                                                P. Wouters
Intended status: Standards Track                                 Red Hat
Expires: April 21, 2014                                    H. Tschofenig
                                                  Nokia Siemens Networks
                                                        October 18, 2013

                     More Raw Public Keys for IKEv2
                draft-kivinen-ipsecme-oob-pubkey-05.txt

Abstract

   The Internet Key Exchange Version 2 (IKEv2) protocol currently only
   supports raw RSA keys.  In some environments it is useful to make use
   of other types of public keys, such as those based on Elliptic Curve
   Cryptography.  This documents adds support for other types of raw
   public keys to IKEv2.

Status of this Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF).  Note that other groups may also distribute
   working documents as Internet-Drafts.  The list of current Internet-
   Drafts is at http://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on April 21, 2014.

Copyright Notice

   Copyright (c) 2013 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

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   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
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . . . 3
   3.  Certificate Encoding Payload  . . . . . . . . . . . . . . . . . 3
   4.  Security Considerations . . . . . . . . . . . . . . . . . . . . 4
   5.  IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 5
   6.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . . . 5
   7.  References  . . . . . . . . . . . . . . . . . . . . . . . . . . 5
     7.1.  Normative References  . . . . . . . . . . . . . . . . . . . 5
     7.2.  Informative References  . . . . . . . . . . . . . . . . . . 6
   Appendix A.  Examples . . . . . . . . . . . . . . . . . . . . . . . 6
     A.1.  ECDSA Example . . . . . . . . . . . . . . . . . . . . . . . 6
     A.2.  RSA Example . . . . . . . . . . . . . . . . . . . . . . . . 8
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . . . 9

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1.  Introduction

   Secure DNS allows public keys to be associated with domain names for
   usage with security protocols like Internet Key Exchange Version 2
   (IKEv2) [I-D.kivinen-ipsecme-ikev2-rfc5996bis] and Transport Layer
   Security (TLS) but it relies on extensions in those protocols to be
   specified.

   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 keys types are, however, not supported.  In
   [I-D.kivinen-ipsecme-ikev2-rfc5996bis] this feature was removed, and
   this document adds support for raw public keys back to IKEv2 in more
   generic way.

   The TLS Out-of-Band Public Key Validation specification
   ([I-D.ietf-tls-oob-pubkey]) adds generic support for raw public keys
   to TLS by re-using the SubjectPublicKeyInfo format from the X.509
   Public Key Infrastructure Certificate profile [RFC5280].

   This document is similar than the TLS Out-of-Band Public Key
   Validation specification, and applies the concept to IKEv2 to support
   all public key formats defined by PKIX.  This approach also allows

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