Policy Qualifiers in RPKI Certificates
draft-newton-sidr-policy-qualifiers-00

Abstract

This document updates RFC 6487 by clarifying the inclusion of policy qualifiers in the certificate policies extension of RPKI resource certificates.

Status of This Memo

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This Internet-Draft will expire on June 08, 2013.

Copyright Notice

Copyright (c) 2012 IETF Trust and the persons identified as the document authors. All rights reserved.

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1. 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].

2. Update to RFC 6487

[RFC6487] profiles certificates, certificate revocation lists, and certificate signing requests specified in [RFC5280] for use in routing public key infrastructure.

[RFC5280] defines an extension to certificates for the listing of policy information (See section 4.2.1.4). [RFC6487] states in Section 4.8.9: "This extension MUST be present and MUST be marked critical. It MUST include exactly one policy, as specified in the RPKI CP [RFC6484]". This references the CertPolicyId of the sequence allowed in PolicyInformation as defined by [RFC5280].

[RFC5280] also specifies that PolicyInformation may optionally have a sequence of PolicyQualifierInfo objects. [RFC6487] does not specifically allow or disallow these PolicyQualifierInfo objects although it also states in section 4: "Unless specifically noted as being OPTIONAL, all the fields listed here MUST be present, and any other fields MUST NOT appear in a conforming resource certificate."

This document updates [RFC6487], Section 4.8.9, to explicitly allow optional PolicyQualifierInfo objects in the PolicyInformation specified by [RFC6487].

As noted in [RFC5280], section 4.2.1.4: "Optional qualifiers, which MAY be present, are not expected to change the definition of the policy." In this case any optional policy qualifiers that MAY be present in a resource certificate MUST NOT change the definition of the RPKI CP [RFC6484].

3. Acknowledgements

Frank Hill and Adam Guyot helped define the scope of this issue and identified and worked with RPKI validator implementers to clarify the use of policy qualifiers in resource certificates.

4. Normative References

Authors' Addresses

Table of Contents

• 1. Terminology
• 2. Update to RFC 6487
• 3. Acknowledgements
• 4. Normative References
• Authors' Addresses