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Internet Engineering Task Force (IETF)                          J. Arkko
Request for Comments: 6309                                    A. Keranen
Obsoletes: 4909                                              J. Mattsson
Updates: 3830, 4563, 5410, 6043                                 Ericsson
Category: Standards Track                                    August 2011
ISSN: 2070-1721

           IANA Rules for MIKEY (Multimedia Internet KEYing)

Abstract

   This document clarifies and relaxes the IANA rules for Multimedia
   Internet KEYing (MIKEY).  This document updates RFCs 3830, 4563,
   5410, and 6043; it obsoletes RFC 4909.

Status of This Memo

   This is an Internet Standards Track document.

   This document is a product of the Internet Engineering Task Force
   (IETF).  It represents the consensus of the IETF community.  It has
   received public review and has been approved for publication by the
   Internet Engineering Steering Group (IESG).  Further information on
   Internet Standards is available in Section 2 of RFC 5741.

   Information about the current status of this document, any errata,
   and how to provide feedback on it may be obtained at
   http://www.rfc-editor.org/info/RFC 6309.

Copyright Notice

   Copyright (c) 2011 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents
   (http://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
   to this document.  Code Components extracted from this document must
   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Arkko, et al.                Standards Track                    [Page 1]
RFC 6309 MIKEY IANA Rules August 2011 1. Introduction This document relaxes the IANA rules for Multimedia Internet KEYing (MIKEY) [RFC 3830]. The IANA rules defined in [RFC 3830], [RFC 4563], [RFC 4909], and [RFC 5410] are affected. In addition, the rules specified in [RFC 6043] are re-specified here. Most of the values in MIKEY namespaces are divided into two ranges: "IETF Review" (or "IETF Consensus" as it was previously called) and "Reserved for Private Use" [RFC 5226]. This document changes, for majority of the namespaces, the requirement of "IETF Review" to "IETF Review or IESG Approval" [RFC 5226]. For some namespaces, the requirement is changed to "Specification Required" [RFC 5226]. The rationale for this update is that there can be situations where it makes sense to grant an allocation under special circumstances or that time has shown that the current requirement is unnecessarily strict for some of the namespaces. By changing the current IANA rules to also allow for "IESG Approval" [RFC 5226], it becomes possible for the Internet Engineering Steering Group (IESG) to consider an allocation request, even if it does not fulfill the default rule. For instance, an experimental protocol extension could perhaps deserve a new payload type as long as a sufficient number of types still remains, and the MIKEY community is happy with such an allocation. Moreover, for some registries, a stable specification would be a sufficient requirement, and this is thus reflected in the updated IANA rules. For instance, an RFC via the Independent Stream at the RFC Editor is sufficient for some registries and does not force an IETF evaluation of a particular new extension for which there is no general demand. Nevertheless, "IETF Review" is still encouraged (instead of using the "IESG Approval" path) if there is doubt about whether or not it is needed for a new allocation. The rest of this document is structured as follows. Section 2 defines the new IANA rules. Section 3 discusses the security implications of this document. Sections 4, 5, 6, and 7 explain the changes to [RFC 3830], [RFC 4563], [RFC 4909], [RFC 5410], and [RFC 6043]. 2. IANA Considerations IANA updated the registries related to MIKEY as specified below. All other MIKEY IANA registries remain unchanged. New values for the version field ([RFC 3830], Section 6.1) and the C envelope key cache indicator ([RFC 3830], Section 6.3) field can be allocated via "IETF Review". Arkko, et al. Standards Track [Page 2]
RFC 6309 MIKEY IANA Rules August 2011 The "IETF Review" requirement for adding new values into namespaces, originally defined in [RFC 3830], is to be changed to "IETF Review or IESG Approval". This change affects the following namespaces: o data type ([RFC 3830], Section 6.1) o Next payload ([RFC 3830], Section 6.1) o PRF func ([RFC 3830], Section 6.1) o CS ID map type ([RFC 3830], Section 6.1) o Encr alg ([RFC 3830], Section 6.2) o MAC alg ([RFC 3830], Section 6.2) o DH-Group ([RFC 3830], Section 6.4) o S type ([RFC 3830], Section 6.5) o TS type ([RFC 3830], Section 6.6) o ID Type ([RFC 3830], Section 6.7) o Cert Type ([RFC 3830], Section 6.7) o Hash func ([RFC 3830], Section 6.8) o SRTP Type ([RFC 3830], Section 6.10) o SRTP encr alg ([RFC 3830], Section 6.10) o SRTP auth alg ([RFC 3830], Section 6.10) o SRTP PRF ([RFC 3830], Section 6.10) o FEC order ([RFC 3830], Section 6.10) o Key Data Type ([RFC 3830], Section 6.13) o KV Type ([RFC 3830], Section 6.13) Arkko, et al. Standards Track [Page 3]
RFC 6309 MIKEY IANA Rules August 2011 The "IETF Review" requirement for the following registries, originally defined in [RFC 3830], [RFC 4563], [RFC 4909], and [RFC 5410], is to be changed to "Specification Required". o Prot type ([RFC 3830], Section 6.10) o Error no ([RFC 3830], Section 6.12) o General Extension Type ([RFC 3830], Section 6.15) o KEY ID Type ([RFC 4563], Section 4) o OMA BCAST Data Subtype ([RFC 5410], Section 3) The "Specification Required" requirement remains for the following namespaces: o TS Role ([RFC 6043], Section 6.4) o ID Role ([RFC 6043], Section 6.6) o RAND Role ([RFC 6043], Section 6.8) o Ticket Type ([RFC 6043], Section 6.10) The range of valid values for certain namespaces defined in the IANA considerations of [RFC 3830] was not explicitly defined and is clarified here as follows: +--------------------------------+--------------+ | Namespace | Valid values | +--------------------------------+--------------+ | C Envelope Key Cache Indicator | 0 - 3 | | S type | 0 - 15 | | Key Data Type | 0 - 15 | | KV Type | 0 - 15 | +--------------------------------+--------------+ 3. Security Considerations This specification does not change the security properties of MIKEY. However, when new values are introduced without IETF consensus, care needs to be taken to assure that possible security concerns regarding the new values are still addressed. Arkko, et al. Standards Track [Page 4]
RFC 6309 MIKEY IANA Rules August 2011 4. Changes from RFC 3830 Section 2 relaxes the requirements from those defined in [RFC 3830]. A number of namespaces now have the "IETF Review or IESG Approval" requirement, when they previously had the "IETF Review" requirement. In addition, some namespaces now have the "Specification Required" requirement. 5. Changes from RFC 4563 Section 2 relaxes the requirements from those defined in [RFC 4563]. The KEY ID Type namespace now has the "Specification Required" requirement. 6. Changes from RFC 4909 and RFC 5410 Section 2 relaxes the requirements from those defined in [RFC 4909]. The OMA BCAST Data Subtype namespace now has the "Specification Required" requirement. Note that [RFC 5410] obsoleted [RFC 4909] but does not actually define the IANA rules itself. As a result, from now on, this RFC defines the IANA requirements for the OMA BCAST Data Subtype namespace. 7. Changes from RFC 6043 There are no changes to the rules specified in [RFC 6043]. However, for sake of completeness, Section 2 re-specifies these rules in this document, and from now on, this RFC defines the IANA requirements for those namespaces. 8. References 8.1. Normative References [RFC 3830] Arkko, J., Carrara, E., Lindholm, F., Naslund, M., and K. Norrman, "MIKEY: Multimedia Internet KEYing", RFC 3830, August 2004. [RFC 4563] Carrara, E., Lehtovirta, V., and K. Norrman, "The Key ID Information Type for the General Extension Payload in Multimedia Internet KEYing (MIKEY)", RFC 4563, June 2006. [RFC 5226] Narten, T. and H. Alvestrand, "Guidelines for Writing an IANA Considerations Section in RFCs", BCP 26, RFC 5226, May 2008. Arkko, et al. Standards Track [Page 5]
RFC 6309 MIKEY IANA Rules August 2011 [RFC 5410] Jerichow, A. and L. Piron, "Multimedia Internet KEYing (MIKEY) General Extension Payload for Open Mobile Alliance BCAST 1.0", RFC 5410, January 2009. [RFC 6043] Mattsson, J. and T. Tian, "MIKEY-TICKET: Ticket-Based Modes of Key Distribution in Multimedia Internet KEYing (MIKEY)", RFC 6043, March 2011. 8.2. Informative References [RFC 4909] Dondeti, L., Castleford, D., and F. Hartung, "Multimedia Internet KEYing (MIKEY) General Extension Payload for Open Mobile Alliance BCAST LTKM/STKM Transport", RFC 4909, June 2007. Authors' Addresses Jari Arkko Ericsson Jorvas 02420 Finland EMail: jari.arkko@piuha.net Ari Keranen Ericsson Jorvas 02420 Finland EMail: ari.keranen@ericsson.com John Mattsson Ericsson Stockholm SE-164 80 Sweden EMail: john.mattsson@ericsson.com Arkko, et al. Standards Track [Page 6]