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Encrypting the Protocol for Carrying Authentication for Network Access (PANA) Attribute-Value Pairs
RFC 6786

Internet Engineering Task Force (IETF)                          A. Yegin
Request for Comments: 6786                                       Samsung
Category: Standards Track                                      R. Cragie
ISSN: 2070-1721                                           Gridmerge Ltd.
                                                           November 2012

        Encrypting the Protocol for Carrying Authentication for
              Network Access (PANA) Attribute-Value Pairs

Abstract

   This document specifies a mechanism for delivering the Protocol for
   Carrying Authentication for Network Access (PANA) Attribute-Value
   Pairs (AVPs) in encrypted form.

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/rfc6786.

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.

Yegin & Cragie               Standards Track                    [Page 1]
RFC 6786                   PANA AVP Encryption             November 2012

Table of Contents

   1. Introduction ....................................................2
      1.1. Specification of Requirements ..............................2
   2. Details .........................................................3
   3. Encryption Keys .................................................3
   4. Encryption-Algorithm AVP ........................................4
      4.1. AES128_CTR Encryption Algorithm ............................5
   5. Encryption-Encap AVP ............................................6
   6. Encryption Policy ...............................................6
      6.1. Encryption Policy Specification ............................7
   7. Security Considerations .........................................8
      7.1. AES-CTR Security Considerations ............................9
   8. IANA Considerations .............................................9
      8.1. PANA AVP Codes .............................................9
      8.2. PANA Encryption-Algorithm AVP Values .......................9
      8.3. PANA AVP Codes Encryption Policy ..........................10
   9. Acknowledgments ................................................10
   10. Normative References ..........................................10

1.  Introduction

   PANA [RFC5191] is a UDP-based protocol to perform an Extensible
   Authentication Protocol (EAP) authentication between a PANA Client
   (PaC) and a PANA Authentication Agent (PAA).

   Various types of payload are exchanged as part of the network access
   authentication and authorization.  These payloads are carried in PANA
   Attribute-Value Pairs (AVPs).  AVPs can be integrity protected using
   the AUTH AVP when EAP authentication generates cryptographic keying
   material.  AVPs are transmitted in the clear (i.e., not encrypted).

   Certain payload types need to be delivered privately (e.g., network
   keys, private identifiers, etc.).  This document defines a mechanism
   for applying encryption to selected AVPs.

1.1.  Specification of Requirements

   In this document, several words are used to signify the requirements
   of the specification.  These words are often capitalized.  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].

Yegin & Cragie               Standards Track                    [Page 2]
RFC 6786                   PANA AVP Encryption             November 2012

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