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Diameter Attribute-Value Pairs for Cryptographic Key Transport
RFC 6734

Internet Engineering Task Force (IETF)                           G. Zorn
Request for Comments: 6734                                   Network Zen
Category: Standards Track                                          Q. Wu
ISSN: 2070-1721                                                   Huawei
                                                              V. Cakulev
                                                          Alcatel Lucent
                                                            October 2012

     Diameter Attribute-Value Pairs for Cryptographic Key Transport

Abstract

   Some Authentication, Authorization, and Accounting (AAA) applications
   require the transport of cryptographic keying material.  This
   document specifies a set of Attribute-Value Pairs (AVPs) providing
   native Diameter support of cryptographic key delivery.

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/rfc6734.

Copyright Notice

   Copyright (c) 2012 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.

Zorn, et al.                 Standards Track                    [Page 1]
RFC 6734               Diameter Key Transport AVPs          October 2012

Table of Contents

   1. Introduction ....................................................2
   2. Terminology .....................................................3
      2.1. Requirements Language ......................................3
      2.2. Technical Terms and Acronyms ...............................3
   3. Attribute-Value Pair Definitions ................................3
      3.1. Key AVP ....................................................3
           3.1.1. Key-Type AVP ........................................4
           3.1.2. Key-Name AVP ........................................4
           3.1.3. Keying-Material AVP .................................4
           3.1.4. Key-Lifetime AVP ....................................4
           3.1.5. Key-SPI .............................................5
   4. Security Considerations .........................................5
   5. IANA Considerations .............................................5
      5.1. AVP Codes ..................................................5
      5.2. AVP Values .................................................5
   6. Acknowledgements ................................................6
   7. References ......................................................6
      7.1. Normative References .......................................6
      7.2. Informative References .....................................6

1.  Introduction

   The Diameter Extensible Authentication Protocol (EAP) application
   [RFC4072] defines the EAP-Master-Session-Key and EAP-Key-Name AVPs
   for the purpose of transporting cryptographic keying material derived
   during the execution of certain Extensible Authentication Protocol
   (EAP) [RFC3748] methods (for example, EAP-TLS [RFC5216]).  At most
   one instance of either of these AVPs is allowed in any Diameter
   message.

   However, recent work (see, for example, [RFC5295]) has specified
   methods to derive other keys from the keying material created during
   EAP method execution that may require transport in addition to the
   Master Session Key (MSK).  Also, the EAP Re-authentication Protocol
   (ERP) [RFC6696] specifies new keys that may need to be transported
   between Diameter nodes.

   This document specifies a set of AVPs allowing the transport of
   multiple cryptographic keys in a single Diameter message.

Zorn, et al.                 Standards Track                    [Page 2]
RFC 6734               Diameter Key Transport AVPs          October 2012

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