Multimedia Internet KEYing (MIKEY) General Extension Payload for Open Mobile Alliance BCAST 1.0
The information below is for an old version of the document that is already published as an RFC.
This is an older version of an Internet-Draft that was ultimately published as RFC 5410.
|Authors||Laurent Piron , Anja Jerichow|
|Last updated||2015-10-14 (Latest revision 2008-10-24)|
|RFC stream||Internet Engineering Task Force (IETF)|
|IESG||IESG state||RFC 5410 (Informational)|
|Responsible AD||Tim Polk|
|Send notices to||Hannes.Tschofenig@nsn.com|
Network Working Group A. Jerichow, Ed. Internet-Draft Nokia Siemens Networks Obsoletes: 4909 (if approved) L. Piron Intended status: Informational Nagravision S.A. Expires: April 27, 2009 October 24, 2008 MIKEY General Extension Payload for OMA BCAST 1.0 draft-jerichow-msec-mikey-genext-oma-00 Status of this Memo By submitting this Internet-Draft, each author represents that any applicable patent or other IPR claims of which he or she is aware have been or will be disclosed, and any of which he or she becomes aware will be disclosed, in accordance with Section 6 of BCP 79. Internet-Drafts are working documents of the Internet Engineering Task Force (IETF), its areas, and its working groups. Note that other groups may also distribute working documents as Internet- Drafts. Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced, or obsoleted by other documents at any time. It is inappropriate to use Internet-Drafts as reference material or to cite them other than as "work in progress." The list of current Internet-Drafts can be accessed at http://www.ietf.org/ietf/1id-abstracts.txt. The list of Internet-Draft Shadow Directories can be accessed at http://www.ietf.org/shadow.html. This Internet-Draft will expire on April 27, 2009. Abstract This document extends the General Extension Payload for OMA BCAST usage defined in RFC 4909 . It adds necessary support for the newly specified management data as defined in the Open Mobile Alliance's (OMA) Broadcast (BCAST) group's Service and Content protection specification . Jerichow & Piron Expires April 27, 2009 [Page 1] Internet-Draft OMA BCAST MIKEY GenExt October 2008 Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3 2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . . 3 3. MIKEY General Extension for OMA BCAST Usage . . . . . . . . . . 3 4. Interoperability considerations . . . . . . . . . . . . . . . . 5 5. Security Considerations . . . . . . . . . . . . . . . . . . . . 5 6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 5 7. Changes since RFC 4909 . . . . . . . . . . . . . . . . . . . . 6 8. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . 6 9. Normative References . . . . . . . . . . . . . . . . . . . . . 6 Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 7 Intellectual Property and Copyright Statements . . . . . . . . . . 8 Jerichow & Piron Expires April 27, 2009 [Page 2] Internet-Draft OMA BCAST MIKEY GenExt October 2008 1. Introduction The Multimedia Internet Keying (MIKEY) protocol specification (RFC 3830 ) defines a General Extension payload to allow possible extensions to MIKEY without having to allocate a new payload type. The General Extension payload can be used in any MIKEY message and is part of the authenticated/signed data part. There is an 8-bit type field in that payload. The type code assignment is IANA-managed, and RFC 3830 requires IETF consensus for assignments from the public range of 0-240. The Open Mobile Alliance's (OMA) Broadcast (BCAST) group's Service and Content Protection specification  specifies the use of a short- term key message (STKM), a long-term key message (LTKM), a LTKM reporting message, as well as a parental control message that carry attributes related to Service and Content protection. Note that any keys associated with the attributes, such as the Parental Control Pincode if present, are part of the MIKEY KEMAC payload. This document specifies the use of the General Extension payload of MIKEY to carry the messages mentioned above, as well as protection of the credentials using mechanisms supported by MIKEY with modifications in . RFC 3830 , the MIKEY General Extension payload defined in RFC 4563 , and the 3rd Generation Partnership Project (3GPP)'s Multimedia Broadcast/ Multicast Service (MBMS) document  specify the transport of MIKEY messages via unicast or broadcast and the OMA specifications use either for transport of MIKEY messages. 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 RFC 2119 . OMA BCAST MIKEY General Extension: We refer to the General Extension type -- 5 -- as the OMA BCAST MIKEY General Extension. 3. MIKEY General Extension for OMA BCAST Usage Section 6.1 of RFC 3830  specifies the first three fields of the General Extension Payload and defines a variable length Data field. Jerichow & Piron Expires April 27, 2009 [Page 3] Internet-Draft OMA BCAST MIKEY GenExt October 2008 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 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ ! Next ! Type ! Length ! +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ ! OMA BCAST Payload Subtype (variable length) ~ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ Figure 1: OMA BCAST MIKEY General Extension This document specifies the use of Type 5 for OMA BCAST Service and Content Protection using the Smartcard Profile. Type | Value | Comments ------------------------------------------------------------------ OMA BCAST | 5 | information on type and identity of messages Figure 2: Definition of the New General Extension Payload The contents of the variable length data field are defined below. 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 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ ! Sub Type ! Subtype Specific Data (variable length) ~ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ Figure 3: STKM/LTKM/LTKM Reporting/Parental Control Subtype Payload Sub Type: 8 bits. This field indicates the type of the OMA BCAST payload. In this specification, four values are specified: LTKM (1), STKM (2), LTKM Reporting (TBD1), and Parental Control (TBD2). Sub Type Specific Data: Variable length. OMA BCAST Type | Value | Comment ----------------------------------------------------------- LTKM | 1 | Long Term Key Message STKM | 2 | Short Term Key Message LTKM Reporting | TBD1 | LTKM Reporting Message Parental Control | TBD2 | Parental Control Message Figure 4: Subtype definitions for OMA BCAST messages Jerichow & Piron Expires April 27, 2009 [Page 4] Internet-Draft OMA BCAST MIKEY GenExt October 2008 The contents of the OMA BCAST payload field are defined in Section 6 of the OMA BCAST Service and Content Protection specification . 4. Interoperability considerations This document specifies the use of MIKEY General Extension Payload Type 5 and four subtype values (1, 2, TBD1 and TBD2), one each for OMA BCAST Service and Content protection's STKM and LTKM payloads. Interoperability Considerations span several standards bodies, with OMA BCAST 1.0 enabler compliance being the key aspect; as such it is up to the OMA test planning to verify the interoperability and compliance of OMA BCAST 1.0 implementations. This payload type assignment does not change MIKEY beyond RFC 3830  and RFC 4563 . 5. Security Considerations According to RFC 3830 , the general extension payload can be used in any MIKEY message and is part of the authenticated/signed data part. The parameters proposed to be included in the OMA BCAST MIKEY General Extension payload (listed in Section 3) need only to be integrity protected, which is already allowed by the MIKEY specification. The OMA BCAST MIKEY General Extension Payload SHALL be integrity protected. Furthermore, keys or any parameters that require confidentiality MUST NOT be included in the General Extension Payload. If Keys or other confidential data are to be transported via the General Extension Payload, such data MUST be encrypted and encapsulated independently. Finally, note that MIKEY already provides replay protection and that protection covers also the General Extension Payload. 6. IANA Considerations IANA has allocated an OMA BCAST MIKEY General Extension Type --5-- from the "General Extensions payload name space" in the IANA registry at http://www.iana.org/assignments/mikey-payloads for use by OMA BCAST as requested by RFC 4909 . Furthermore, IANA has created a name space for the OMA BCAST payload subtype values defined in  and has assigned the following subtype values from this name space: LTKM (1), STKM (2). IANA is requested to allocate two new subtypes from the OMA BCAST payload subtype name space, referenced above, in the IANA registry at http://www.iana.org/assignments/mikey-payloads. Jerichow & Piron Expires April 27, 2009 [Page 5] Internet-Draft OMA BCAST MIKEY GenExt October 2008 The requested subtypes are as follows: Subtype Name: LTKM Reporting Value: TBD1 Suggested value: 3 and Subtype Name: Parental Control Value: TBD2 Suggested value: 4 Note to Editor: Please replace all TBD1 and TBD2 in this specification with the values assigned by IANA. 7. Changes since RFC 4909 OMA BCAST Service and Content Protection specification  contains messages that were created since RFC 4909 was written. This document only adds the necessary assignments to support these new messages. No modifications are made on values assigned by RFC 4909 . 8. Acknowledgments Many thanks to the authors of RFC 4909  for allowing to update their RFC. 9. Normative References  "Multimedia Internet KEYing (MIKEY) General Extension", RFC 4909, June 2007.  Open Mobile Alliance, "Service and Content Protection for Mobile Broadcast Services", OMA OMA-TS-BCAST_SvcCntProtection-V1_0- 20081015-D, 2008.  Arkko, J., Carrara, E., Lindholm, F., Naslund, M., and K. Norrman, "MIKEY: Multimedia Internet KEYing", RFC 3830, August 2004.  Carrara, E., Lehtovirta, V., and K. Norrman, "The Key ID Jerichow & Piron Expires April 27, 2009 [Page 6] Internet-Draft OMA BCAST MIKEY GenExt October 2008 Information Type for the General Extension Payload in Multimedia Internet KEYing (MIKEY)", RFC 4563, June 2006.  3GPP, "3G Security; Security of Multimedia Broadcast/Multicast Service (MBMS)", 3GPP TS 33.246 6.6.0, March 2006.  Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, March 1997. Authors' Addresses Anja Jerichow (editor) Nokia Siemens Networks Martinstr. 76 81541 Munich Germany Phone: +49 89 636-45868 Email: firstname.lastname@example.org Laurent Piron Nagravision S.A. Case Postale 134 1033 Cheseaux Switzerland Phone: +41 21 732 05 37 Email: email@example.com Jerichow & Piron Expires April 27, 2009 [Page 7] Internet-Draft OMA BCAST MIKEY GenExt October 2008 Full Copyright Statement Copyright (C) The IETF Trust (2008). This document is subject to the rights, licenses and restrictions contained in BCP 78, and except as set forth therein, the authors retain all their rights. This document and the information contained herein are provided on an "AS IS" basis and THE CONTRIBUTOR, THE ORGANIZATION HE/SHE REPRESENTS OR IS SPONSORED BY (IF ANY), THE INTERNET SOCIETY, THE IETF TRUST AND THE INTERNET ENGINEERING TASK FORCE DISCLAIM ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE INFORMATION HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. 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