Network Working Group R. Gagliano Internet-Draft LACNIC Intended status: Standards Track S. Krishnan Expires: April 9, 2010 Ericsson A. Kukec University of Zagreb October 6, 2009 Subject Key Identifier (SKI) name type for SEND TA option draft-rgaglian-csi-send-ski-ta-nametype-00 Status of this Memo This Internet-Draft is submitted to IETF in full conformance with the provisions of BCP 78 and BCP 79. This document may contain material from IETF Documents or IETF Contributions published or made publicly available before November 10, 2008. The person(s) controlling the copyright in some of this material may not have granted the IETF Trust the right to allow modifications of such material outside the IETF Standards Process. Without obtaining an adequate license from the person(s) controlling the copyright in such materials, this document may not be modified outside the IETF Standards Process, and derivative works of it may not be created outside the IETF Standards Process, except to format it for publication as an RFC or to translate it into languages other than English. Internet-Drafts are working documents of the Internet Engineering Task Force (IETF), its areas, and its working groups. Note that other groups may also distribute working documents as Internet- Drafts. 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." The list of current Internet-Drafts can be accessed at http://www.ietf.org/ietf/1id-abstracts.txt. The list of Internet-Draft Shadow Directories can be accessed at http://www.ietf.org/shadow.html. This Internet-Draft will expire on April 9, 2010. Copyright Notice Copyright (c) 2009 IETF Trust and the persons identified as the Gagliano, et al. Expires April 9, 2010 [Page 1] Internet-Draft SKI name type for SEND October 2009 document authors. All rights reserved. This document is subject to BCP 78 and the IETF Trust's Legal Provisions Relating to IETF Documents in effect on the date of publication of this document (http://trustee.ietf.org/license-info). Please review these documents carefully, as they describe your rights and restrictions with respect to this document. Gagliano, et al. Expires April 9, 2010 [Page 2] Internet-Draft SKI name type for SEND October 2009 Abstract SEcure Neighbor Discovery (SEND) Utilizes X.509v3 certificates for performing router authorization. This document specifies a SEND name type to identify trust anchor X.509v3 certificates based on its Subject Key Identifier. Table of Contents 1. Requirements notation . . . . . . . . . . . . . . . . . . . . 4 2. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 5 3. SEND SKI trust anchor identifier option . . . . . . . . . . . 6 3.1. Processing Rules for Router . . . . . . . . . . . . . . . 6 4. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 7 5. Security Considerations . . . . . . . . . . . . . . . . . . . 8 6. Normative References . . . . . . . . . . . . . . . . . . . . . 9 Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 10 Gagliano, et al. Expires April 9, 2010 [Page 3] Internet-Draft SKI name type for SEND October 2009 1. Requirements notation The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in [RFC2119]. Gagliano, et al. Expires April 9, 2010 [Page 4] Internet-Draft SKI name type for SEND October 2009 2. Introduction SEcure Neighbor Discovery [RFC3971] (SEND) utilizes X.509v3 certificates that include [RFC3779] extension for IPv6 addresses to certify a router authority over an IPv6 prefix for NDP (Neighbor Discovery Protocol). The Tust Anchor Option in section 6.4.3 of RFC 3971 allows the identification of the trust anchor selected by the host. In that section, two name types were defined, the DER Encoded X.501 Name and a Fully Qualified Domain Name (FQDN). In any Public Key Infraestructure, the subject name of a certificate is only unique for each CA. A new option to identify trust anchors accross CAs is needed. In [draft-ietf-csi-send-cert-01] the certificate profile described in [draft-ietf-sidr-res-certs-17] is selected for SEND. In these documents, the Subject field the certificates are declared to be meaningless and the subjectAltName field is not allowed. On the other hand, the Subject Key Identifier (SKI) extension for the X.509 certificates is defined as mandatory and non-critical. This document specifies a new option for SEND that allows to use of the SKI X.509 extension to identify trust anchor material as described in section X.X of RFC 3971. Gagliano, et al. Expires April 9, 2010 [Page 5] Internet-Draft SKI name type for SEND October 2009 3. SEND SKI trust anchor identifier option Name Type TBD SHA-1 Subject Key Identifier (SKI) The Key Identifier used here is the 160-bit SHA-1 hash of the value of the DER-encoded ASN.1 bit string of the subject public key, as described in Section 4.2.1.2 of [RFC5280]. 3.1. Processing Rules for Router As described in RFC 3971, The anchor is identified by the Trust Anchor option. If the Trust Anchor option is represented as a SHA-1 SKI, then the SKI must be equal to the SKI in the anchor's certificate calculated as described in [draft-ietf-sidr-res-certs-17]. The router SHOULD include the Trust Anchor option(s) in the advertisement for which the certification path was found. If the router is unable to find a path to the requested anchor, it SHOULD send an advertisement without any certificates. In this case, the router SHOULD include the Trust Anchor options that were solicited. Gagliano, et al. Expires April 9, 2010 [Page 6] Internet-Draft SKI name type for SEND October 2009 4. IANA Considerations This document defines a new Name Type for Neighbor Discovery Protocol Trust Anchor option (15). Gagliano, et al. Expires April 9, 2010 [Page 7] Internet-Draft SKI name type for SEND October 2009 5. Security Considerations TBD. Gagliano, et al. Expires April 9, 2010 [Page 8] Internet-Draft SKI name type for SEND October 2009 6. Normative References [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, March 1997. [RFC3779] Lynn, C., Kent, S., and K. Seo, "X.509 Extensions for IP Addresses and AS Identifiers", RFC 3779, June 2004. [RFC3971] Arkko, J., Kempf, J., Zill, B., and P. Nikander, "SEcure Neighbor Discovery (SEND)", RFC 3971, March 2005. [RFC5280] Cooper, D., Santesson, S., Farrell, S., Boeyen, S., Housley, R., and W. Polk, "Internet X.509 Public Key Infrastructure Certificate and Certificate Revocation List (CRL) Profile", RFC 5280, May 2008. Gagliano, et al. Expires April 9, 2010 [Page 9] Internet-Draft SKI name type for SEND October 2009 Authors' Addresses Roque Gagliano LACNIC Rambla Rep Mexico 6125 Montevideo, 11400 UY Email: roque@lacnic.net Suresh Krishnan Ericsson 8400 Decarie Blvd. Town of Mount Royal, QC Canada Phone: +1 514 345 7900 x42871 Email: suresh.krishnan@ericsson.com Ana Kukec University of Zagreb Unska 3 Zagreb Croatia Email: ana.kukec@fer.hr Gagliano, et al. Expires April 9, 2010 [Page 10]