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
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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
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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].
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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.
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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.
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4. IANA Considerations
This document defines a new Name Type for Neighbor Discovery Protocol
Trust Anchor option (15).
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5. Security Considerations
TBD.
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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.
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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
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