Network Working Group L. Dondeti, Ed.
Internet-Draft QUALCOMM, Inc.
Intended status: Informational D. Castleford
Expires: August 10, 2007 Orange FT
F. Hartung
Ericsson Research
February 6, 2007
MIKEY General Extension Payload for OMA BCAST LTKM/STKM Transport
draft-dondeti-msec-mikey-genext-oma-04
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 August 10, 2007.
Copyright Notice
Copyright (C) The IETF Trust (2007).
Abstract
This document specifies a new MIKEY General Extension payload [1] to
transport the short term key message (STKM) and long term key message
(LTKM) payloads defined in the Open Mobile Alliance's (OMA) Browser
and Content (BAC) Broadcast (BCAST) group's Service and Content
protection specification.
Dondeti, et al. Expires August 10, 2007 [Page 1]
Internet-Draft OMA BCAST MIKEY General Extension Payload February 2007
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . . 3
3. MIKEY General Extension for OMA BCAST Usage . . . . . . . . . 3
4. Interoperability considerations . . . . . . . . . . . . . . . . 4
5. Security Considerations . . . . . . . . . . . . . . . . . . . . 5
6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 5
7. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . 5
8. References . . . . . . . . . . . . . . . . . . . . . . . . . . 5
8.1. Normative References . . . . . . . . . . . . . . . . . . . 5
8.2. Informative References . . . . . . . . . . . . . . . . . . 6
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 6
Intellectual Property and Copyright Statements . . . . . . . . . . 8
Dondeti, et al. Expires August 10, 2007 [Page 2]
Internet-Draft OMA BCAST MIKEY General Extension Payload February 2007
1. Introduction
The Multimedia Internet Keying (MIKEY) protocol specification [1]
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 and 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) Browser and Content (BAC) Broadcast
(BCAST) group's Service and Content Protection specification [2]
specifies the use of a short term key message (STKM) and a long term
key message (LTKM) that carry attributes related to Service and
Content protection. Note that any keys associated with the
attributes are part of the MIKEY KEMAC payload. This document
specifies the use of the General Extension payload of MIKEY to carry
the LTKMs or STKMs.
RFC 3830, the MIKEY General Extension payload defined in [3] along
with the 3rd Generation Partnership Project (3GPP)'s Multimedia
Broadcast/Multicast Service (MBMS) [4] 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 [5].
OMA BCAST STKM/LTKM MIKEY General Extension : We refer to the
General Extension type -- value, to be assigned by IANA -- as the
OMA BCAST STKM/LTKM MIKEY General Extension .
3. MIKEY General Extension for OMA BCAST Usage
Dondeti, et al. Expires August 10, 2007 [Page 3]
Internet-Draft OMA BCAST MIKEY General Extension Payload February 2007
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 S/LTKM Subtype (variable length) ~
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Figure 1: OMA BCAST MIKEY General Extension
Section 6.1 of RFC 3830 specifies the first three fields of the
General Extension Payload and defines a variable length Data field.
This document specifies the use of Type XX [To be filled in by the
RFC Editor after IANA assignment] for OMA BCAST Service and Content
Protection using the Smartcard Profile. The contents of the variable
length data field are defined below.
Sub Type: 8 bits. This field indicates the type of the OMA BCAST
payload. In this specification, only two values are specified:
LTKM (1), and STKM (2).
Sub Type Specific Data: Variable length. The contents of this
field are defined in Section 6 of the OMA BCAST Service and
Content Protection specification [2].
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 2: STKM/LTKM Subtype Payload
4. Interoperability considerations
This document specifies the use of MIKEY General Extension Payload
Type XX [to be assigned by IANA based on IETF review] and a couple of
subtype values (1 and 2), 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 [3].
Dondeti, et al. Expires August 10, 2007 [Page 4]
Internet-Draft OMA BCAST MIKEY General Extension Payload February 2007
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 the General
Extension Payload also.
6. IANA Considerations
IANA is requested to allocate a new General Extension Type from the
"General Extensions payload name spaces" in the IANA registry at
http://www.iana.org/assignments/mikey-payloads for use by OMA BCAST.
Furthermore, IANA is requested to maintain a list of corresponding
subtypes (0-255) as follows:
0 ... Reserved
1 ... LTKM
2 ... STKM
3 ... 191 (maintained by IANA and assigned by IETF Review[6])
192 ... 255 (Private use)
7. Acknowledgments
Many thanks to Jari Arkko, Piron Laurent and Steffen Fries for their
reviews and suggestions for improvement.
8. References
8.1. Normative References
[1] Arkko, J., Carrara, E., Lindholm, F., Naslund, M., and K.
Norrman, "MIKEY: Multimedia Internet KEYing", RFC 3830,
Dondeti, et al. Expires August 10, 2007 [Page 5]
Internet-Draft OMA BCAST MIKEY General Extension Payload February 2007
August 2004.
[2] Open Mobile Alliance, "Service and Content Protection for Mobile
Broadcast Services", OMA TS-BCAST-SvcCntProtection-V1_0-
20060412-D, 2006.
[3] 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.
[4] 3GPP, "3G Security; Security of Multimedia Broadcast/Multicast
Service (MBMS)", 3GPP TS 33.246 6.6.0, March 2006.
[5] Bradner, S., "Key words for use in RFCs to Indicate Requirement
Levels", BCP 14, RFC 2119, March 1997.
8.2. Informative References
[6] Narten, T. and H. Alvestrand, "Guidelines for Writing an IANA
Considerations Section in RFCs",
draft-narten-iana-considerations-rfc2434bis-05 (work in
progress), September 2006.
Authors' Addresses
Lakshminath Dondeti (editor)
QUALCOMM, Inc.
5775 Morehouse Dr
San Diego, CA
USA
Phone: +1 858-845-1267
Email: ldondeti@qualcomm.com
David Castleford
Orange FT
4, rue du Clos Courtel
35512 Cesson Sevigne Cedex,
France
Phone: + 33 (0)2 99 12 49 27
Email: david.castleford@orange-ft.com
Dondeti, et al. Expires August 10, 2007 [Page 6]
Internet-Draft OMA BCAST MIKEY General Extension Payload February 2007
Frank Hartung
Ericsson Research
Ericsson Allee 1
52134 Herzogenrath,
Germany
Phone: +49 2407 575389
Email: frank.hartung@ericsson.com
Dondeti, et al. Expires August 10, 2007 [Page 7]
Internet-Draft OMA BCAST MIKEY General Extension Payload February 2007
Full Copyright Statement
Copyright (C) The IETF Trust (2007).
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.
Intellectual Property
The IETF takes no position regarding the validity or scope of any
Intellectual Property Rights or other rights that might be claimed to
pertain to the implementation or use of the technology described in
this document or the extent to which any license under such rights
might or might not be available; nor does it represent that it has
made any independent effort to identify any such rights. Information
on the procedures with respect to rights in RFC documents can be
found in BCP 78 and BCP 79.
Copies of IPR disclosures made to the IETF Secretariat and any
assurances of licenses to be made available, or the result of an
attempt made to obtain a general license or permission for the use of
such proprietary rights by implementers or users of this
specification can be obtained from the IETF on-line IPR repository at
http://www.ietf.org/ipr.
The IETF invites any interested party to bring to its attention any
copyrights, patents or patent applications, or other proprietary
rights that may cover technology that may be required to implement
this standard. Please address the information to the IETF at
ietf-ipr@ietf.org.
Acknowledgment
Funding for the RFC Editor function is provided by the IETF
Administrative Support Activity (IASA).
Dondeti, et al. Expires August 10, 2007 [Page 8]
