6tisch Zero-Touch Secure Join protocol
draft-ietf-6tisch-dtsecurity-zerotouch-join-04

Document Type Active Internet-Draft (6tisch WG)
Last updated 2019-07-08
Replaces draft-ietf-6tisch-dtsecurity-secure-join
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6tisch Working Group                                       M. Richardson
Internet-Draft                                  Sandelman Software Works
Intended status: Informational                             July 08, 2019
Expires: January 9, 2020

                 6tisch Zero-Touch Secure Join protocol
             draft-ietf-6tisch-dtsecurity-zerotouch-join-04

Abstract

   This document describes a Zero-touch Secure Join (ZSJ) mechanism to
   enroll a new device (the "pledge") into a IEEE802.15.4 TSCH network
   using the 6tisch signaling mechanisms.  The resulting device will
   obtain a domain specific credential that can be used with either
   802.15.9 per-host pair keying protocols, or to obtain the network-
   wide key from a coordinator.  The mechanism describe here is an
   augmentation to the one-touch mechanism described in
   [I-D.ietf-6tisch-minimal-security], and is a profile of the
   constrained voucher mechanism [I-D.ietf-anima-constrained-voucher].

Status of This Memo

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   This Internet-Draft will expire on January 9, 2020.

Copyright Notice

   Copyright (c) 2019 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
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   (https://trustee.ietf.org/license-info) in effect on the date of
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   carefully, as they describe your rights and restrictions with respect

Richardson               Expires January 9, 2020                [Page 1]
Internet-Draft   6tisch Zero-Touch Secure Join protocol        July 2019

   to this document.  Code Components extracted from this document must
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   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
     1.1.  Prior Bootstrapping Approaches  . . . . . . . . . . . . .   5
     1.2.  Terminology . . . . . . . . . . . . . . . . . . . . . . .   5
     1.3.  Scope of solution . . . . . . . . . . . . . . . . . . . .   6
     1.4.  Leveraging the new key infrastructure / next steps  . . .   7
       1.4.1.  Key Distribution Process  . . . . . . . . . . . . . .   7
   2.  Architectural Overview  . . . . . . . . . . . . . . . . . . .   7
     2.1.  Behavior of a Pledge  . . . . . . . . . . . . . . . . . .   7
     2.2.  Secure Imprinting using Vouchers  . . . . . . . . . . . .   9
     2.3.  Initial Device Identifier . . . . . . . . . . . . . . . .   9
     2.4.  Protocol Flow . . . . . . . . . . . . . . . . . . . . . .  10
     2.5.  Architectural Components  . . . . . . . . . . . . . . . .  12
       2.5.1.  Pledge  . . . . . . . . . . . . . . . . . . . . . . .  12
       2.5.2.  Stateless IPIP Join Proxy . . . . . . . . . . . . . .  12
       2.5.3.  Domain Registrar  . . . . . . . . . . . . . . . . . .  12
       2.5.4.  Manufacturer Service  . . . . . . . . . . . . . . . .  12
     2.6.  Certificate Time Validation . . . . . . . . . . . . . . .  12
       2.6.1.  Lack of realtime clock  . . . . . . . . . . . . . . .  13
     2.7.  Cloud Registrar . . . . . . . . . . . . . . . . . . . . .  13
     2.8.  Determining the MASA to contact . . . . . . . . . . . . .  13
   3.  Voucher-Request artifact  . . . . . . . . . . . . . . . . . .  13
   4.  Proxying details (Pledge - Proxy - Registrar) . . . . . . . .  13
   5.  Proxy details . . . . . . . . . . . . . . . . . . . . . . . .  14
     5.1.  Pledge discovery of Proxy . . . . . . . . . . . . . . . .  14
     5.2.  HTTPS proxy connection to Registrar . . . . . . . . . . .  14
     5.3.  Proxy discovery of Registrar  . . . . . . . . . . . . . .  14
   6.  Protocol Details (Pledge - Registrar - MASA)  . . . . . . . .  15
     6.1.  BRSKI-EST (D)TLS establishment details  . . . . . . . . .  15
       6.1.1.  BRSKI-EST CoAP estasblishment details . . . . . . . .  15
       6.1.2.  BRSKI-EST CoAP/EDHOC estasblishment details . . . . .  15
     6.2.  Pledge Requests Voucher from the Registrar  . . . . . . .  17
     6.3.  Registrar Requests Voucher from MASA  . . . . . . . . . .  17
       6.3.1.  MASA renewal of expired vouchers  . . . . . . . . . .  18
       6.3.2.  MASA verification of voucher-request signature
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