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pkix E. Lear
Internet-Draft Cisco Systems
Intended status: Standards Track February 02, 2016
Expires: August 5, 2016


An X.509 Extension for Manufacturer Usage Description URI
draft-lear-ietf-pkix-mud-extension-00

Abstract

Manufacturer User Descriptions are used by device manufacturers to
provide indications to the network as to the intended use of a
particular device and with what end points it might communicate. A
URI points to those descriptions. This memo specifies an X.509
certificate extension to specify that URI in a device certificate to
be used with IEEE 802.1AR.

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
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This Internet-Draft will expire on August 5, 2016.

Copyright Notice

Copyright (c) 2016 IETF Trust and the persons identified as the
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include Simplified BSD License text as described in Section 4.e of




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the Trust Legal Provisions and are provided without warranty as
described in the Simplified BSD License.

Table of Contents

1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
2. The Manufacturer Usage Description (MUD) URI Extension . . . 2
3. Security Considerations . . . . . . . . . . . . . . . . . . . 3
4. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 3
5. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . 3
6. References . . . . . . . . . . . . . . . . . . . . . . . . . 3
6.1. Normative References . . . . . . . . . . . . . . . . . . 3
6.2. Informative References . . . . . . . . . . . . . . . . . 4
Author's Address . . . . . . . . . . . . . . . . . . . . . . . . 4

1. Introduction

[I-D.lear-mud-framework] introduces the concept of manufacturer usage
description. In other documents, DHCP is used to identify a URI that
network systems can use to retrieve YANG-based XML that advises the
network on appropriate usage of a device.

Use of DHCP as a means of transmission may not be appropriate for all
use cases, particularly for devices intended for use in critical
environments. The IEEE has developed [IEEE8021AR] that provides a
certificate-based approach to communicate device characteristics,
which itself relies on [RFC5280].

This document specifies an X.509 extension so that such MUD URI may
be communicated via 802.1AR. The MUD URI extension is non-critical,
as required by IEEE 802.1AR.

2. The Manufacturer Usage Description (MUD) URI Extension

[RFC7299] provides a procedure and means to specify extensions to
X.509 certificates. The object identifier (OID) for extensions is as
follows:

- PKIX certificate extensions id-pe OBJECT IDENTIFIER ::= { id-pkix 1
}

The choice of id-pe is based on guidance found in Section 4.2.2 of
[RFC5280]:

These extensions may be used to direct applications to on-line
information about the issuer or the subject.





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The MUD URI is precisely that: online information about the
particular subject.

The new extension is identified as follows:

- The MUD URI extension id-pe-mud-uri OBJECT IDENTIFER ::= { id-pe
TBD }

The extension returns a single value:

mud-uri ::= uniformResourceIdentifier - for use with mud
architecture.

The semantics of the URI are defined [I-D.lear-ietf-netmod-mud].

3. Security Considerations

This document specifies a certificate extension to communicate a
Manufacturer Usage Description URI. The semantics of the URI are
defined in draft-lear-ietf-netmod-mud. At this time, no security
concerns are visible to the author for inclusion of such an
extension.

4. IANA Considerations

The IANA is requested to assign a value for id-pe-mud-uri in the "SMI
Security for PKIX Certificate Extension" Registry.

5. Acknowledgments

The author wishes to thank Max Pritikin for his review and
suggestions.

6. References

6.1. Normative References

[I-D.lear-ietf-netmod-mud]
Lear, E., "Manufacturer Usage Description YANG Model",
draft-lear-ietf-netmod-mud-00 (work in progress), January
2016.

[RFC7299] Housley, R., "Object Identifier Registry for the PKIX
Working Group", RFC 7299, DOI 10.17487/RFC7299, July 2014,
.






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6.2. Informative References

[I-D.lear-mud-framework]
Lear, E., "Manufacturer Usage Description Framework",
draft-lear-mud-framework-00 (work in progress), January
2016.

[IEEE8021AR]
Institute for Electrical and Electronics Engineers,
"Secure Device Identity", 1998.

[IEEE8021X]
Institute for Electrical and Electronics Engineers, "Port
Based Network Access Control", 1998.

[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, DOI 10.17487/RFC5280, May 2008,
.

Author's Address

Eliot Lear
Cisco Systems
Richtistrasse 7
Wallisellen CH-8304
Switzerland

Phone: +41 44 878 9200
Email: lear@cisco.com




















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