Identification of provisioning domains
draft-ietf-mif-mpvd-id-01

Abstract

The MIF working group is producing a solution to solve the issues that are associated with nodes that can be attached to multiple networks. This document describes several methods of generating identification information for provisioning them and a format for carrying such identification in configuration protocols.

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Copyright Notice

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Table of Contents

• 1. Introduction
• 2. Terminology
• 3. Provisioning domain identity format
• 4. Security Considerations
• 5. IANA Considerations
• 6. Acknowledgements
• 7. References
• 7.1. Normative References
• 7.2. Informative References
• Authors' Addresses

1. Introduction

The MIF working group is producing a solution to solve the issues that are associated with nodes that can be attached to multiple networks based on the Multiple Provisioning Domains (MPVD) architecture work [I-D.ietf-mif-mpvd-arch]. This document describes a format for carrying identification information along with a few alternatives for reasonable sources for Provisioning Domain (PVD) identification. Since the PVD identities (PVD ID) are expected to be unique, the identification sources provide some level of uniqueness using either a hierarchical structure (e.g. FQDNs and OIDs) or some form of randomness (e.g. UUID and ULAs). Any source that does not provide either guaranteed or probabilistic uniqueness is probably not a good candidate for identifying provisioning domains.

2. Terminology

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].

3. Provisioning domain identity format

The identity of the PVD is independent of the configuration protocol used to communicate it. Furthermore, the PVD identity SHOULD only contain information related to the identification purposes and not encode additional provisioning domain specific configuration information. The used configuration protocol and its extensions are meant for that purpose [I-D.ietf-mif-mpvd-dhcp-support] [I-D.ietf-mif-mpvd-ndp-support]. The PVD identity is formatted as follows.

 0                   1                   2                   3
 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|    id-type    |   id-length   |                               |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+                               +
+                    PVD identity information                   +
.                       (variable length)                       .
+---------------------------------------------------------------+

PVD ID Option

 o  id-type: Describes the type of identification information. 
    This document defines six types of PVD identity information
      0x01: UUID [RFC4122]
      0x02: UTF-8 string
      0x03: OID [OID]
      0x04: NAI Realm [RFC4282]
      0x05: FQDN
      0x06: ULA Prefix [RFC4193]
      Further types can be added by IANA action.

 o  id-length: Length of the PVD identification  in octets 
    not including the id-type and id-length fields.

 o  PVD identity information: The PVD identification that is 
    based on the id-type.

4. Security Considerations

An attacker may attempt to modify the PVD identity provided in a configuration protocol. These attacks can be prevented by using the configuration protocol mechanisms such as SEND [RFC3971] and DHCPv6 AUTH option [RFC3315] that detect any form of tampering with the configuration.

A compromised configuration source, on the other hand, cannot easily be detected by a configuration client. The only real way to avoid this is that the PVD identification is directly associable to some form of authentication and authorization information from the owner of the PVD (e.g. an FQDN can be associated with a DANE cert). Then, this attack can be detected by the client by verifying the authentication and authorization information provided inside the PVD container option after [I-D.ietf-mif-mpvd-dhcp-support] [I-D.ietf-mif-mpvd-ndp-support] verifying its trust towards the PVD owner (e.g. a certificate with a well-known/common trust anchor that).

5. IANA Considerations

This document creates a new registry for PVD id types. The initial values are listed below

      0x01: UUID [RFC4122]
      0x02: UTF-8 string
      0x03: OID [OID]
      0x04: NAI Realm [RFC4282]
      0x05: FQDN
      0x06: ULA Prefix [RFC4193]

6. Acknowledgements

The authors would like to thank the members of the MIF architecture design team, Ted Lemon, Brian Carpenter, Bernie Volz and Alper Yegin for their contributions to this draft. The authors also thank Ian Farrer for his reviews and comments.

7. References

7.1. Normative References

7.2. Informative References

Authors' Addresses