Bootstrapping Key Infrastructure over EAP
draft-lear-eap-teap-brski-01

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Network Working Group                                            E. Lear
Internet-Draft                                                  O. Friel
Intended status: Standards Track                           N. Cam-Winget
Expires: April 21, 2019                                    Cisco Systems
                                                        October 18, 2018

               Bootstrapping Key Infrastructure over EAP
                      draft-lear-eap-teap-brski-01

Abstract

   In certain environments, in order for a device to establish any layer
   three communications, it is necessary for that device to be properly
   credentialed.  This is a relatively easy problem to solve when a
   device is associated with a human being and has both input and
   display functions.  It is less easy when the human, input, and
   display functions are not present.  To address this case, this memo
   specifies extensions to the Tunnel Extensible Authentication Protocol
   (TEAP) method that leverages Bootstrapping Remote Secure Key
   Infrastructures (BRSKI) in order to provide a credential to a device
   at layer two.  The basis of this work is that a manufacturer will
   introduce the device and the local deployment through cryptographic
   means.  In this sense the same trust model as BRSKI is used.

Status of This Memo

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   This Internet-Draft will expire on April 21, 2019.

Copyright Notice

   Copyright (c) 2018 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

Lear, et al.             Expires April 21, 2019                 [Page 1]
Internet-Draft               BRSKI TEAP EAP                 October 2018

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Terminology . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  TEAP BRSKI Architecture . . . . . . . . . . . . . . . . . . .   3
   3.  BRSKI Bootstrap and Enroll Operation  . . . . . . . . . . . .   4
     3.1.  Executing BRSKI in a TEAP Tunnel  . . . . . . . . . . . .   5
   4.  PKI Certificate Authority Considerations  . . . . . . . . . .   8
     4.1.  TEAP Tunnel Establishment . . . . . . . . . . . . . . . .   8
     4.2.  BRSKI Trust Establishment . . . . . . . . . . . . . . . .   9
   5.  Channel and Crypto Binding  . . . . . . . . . . . . . . . . .  10
   6.  Protocol Flows  . . . . . . . . . . . . . . . . . . . . . . .  10
     6.1.  TEAP Server Grants Access . . . . . . . . . . . . . . . .  10
     6.2.  TEAP Server Instructs Client to Perform BRSKI Flow  . . .  12
     6.3.  TEAP Server Instructs Client to Reenroll  . . . . . . . .  13
     6.4.  Out of Band Reenroll  . . . . . . . . . . . . . . . . . .  14
   7.  TEAP TLV Formats  . . . . . . . . . . . . . . . . . . . . . .  14
     7.1.  BRSKI TLVs  . . . . . . . . . . . . . . . . . . . . . . .  14
       7.1.1.  BRSKI-RequestVoucher TLV  . . . . . . . . . . . . . .  15
       7.1.2.  BRSKI-Voucher TLV . . . . . . . . . . . . . . . . . .  16
       7.1.3.  CSR-Attributes TLV  . . . . . . . . . . . . . . . . .  16
     7.2.  Existing TEAP TLV Specifications  . . . . . . . . . . . .  17
       7.2.1.  PKCS#10 TLV . . . . . . . . . . . . . . . . . . . . .  17
   8.  Fragmentation . . . . . . . . . . . . . . . . . . . . . . . .  17
   9.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  17
   10. Security Considerations . . . . . . . . . . . . . . . . . . .  18
   11. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . .  18
   12. Informative References  . . . . . . . . . . . . . . . . . . .  18
   Appendix A.  Changes from Earlier Versions  . . . . . . . . . . .  19
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  19

1.  Introduction

   [I-D.ietf-anima-bootstrapping-keyinfra] (BRSKI) specifies a means to
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