6tisch Zero-Touch Secure Join protocol
draft-ietf-6tisch-dtsecurity-zerotouch-join-04
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
This Internet-Draft is submitted in full conformance with the
provisions of BCP 78 and BCP 79.
Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF). Note that other groups may also distribute
working documents as Internet-Drafts. The list of current Internet-
Drafts is at https://datatracker.ietf.org/drafts/current/.
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."
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
Provisions Relating to IETF Documents
(https://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
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
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.
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
Show full document text