EST over secure CoAP (EST-coaps)
draft-ietf-ace-coap-est-05
ACE P. van der Stok
Internet-Draft Consultant
Intended status: Standards Track P. Kampanakis
Expires: January 19, 2019 Cisco Systems
S. Kumar
Philips Lighting Research
M. Richardson
SSW
M. Furuhed
Nexus Group
S. Raza
RISE SICS
July 18, 2018
EST over secure CoAP (EST-coaps)
draft-ietf-ace-coap-est-05
Abstract
Enrollment over Secure Transport (EST) is used as a certificate
provisioning protocol over HTTPS. Low-resource devices often use the
lightweight Constrained Application Protocol (CoAP) for message
exchanges. This document defines how to transport EST payloads over
secure CoAP (EST-coaps), which allows low-resource constrained
devices to use existing EST functionality for provisioning
certificates.
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 19, 2019.
van der Stok, et al. Expires January 19, 2019 [Page 1]
Internet-Draft EST-coaps July 2018
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 3
3. Conformance to RFC7925 profiles . . . . . . . . . . . . . . . 3
4. Protocol Design . . . . . . . . . . . . . . . . . . . . . . . 4
4.1. Payload format . . . . . . . . . . . . . . . . . . . . . 5
4.1.1. Content Format application/multipart-core . . . . . . 6
4.2. Message Bindings . . . . . . . . . . . . . . . . . . . . 6
4.3. CoAP response codes . . . . . . . . . . . . . . . . . . . 6
4.4. Delayed Responses . . . . . . . . . . . . . . . . . . . . 7
4.5. Server-side Key Generation . . . . . . . . . . . . . . . 9
4.6. Message fragmentation . . . . . . . . . . . . . . . . . . 10
4.7. Deployment limits . . . . . . . . . . . . . . . . . . . . 11
5. Discovery and URI . . . . . . . . . . . . . . . . . . . . . . 11
6. DTLS Transport Protocol . . . . . . . . . . . . . . . . . . . 13
7. HTTPS-CoAPS Registrar . . . . . . . . . . . . . . . . . . . . 14
8. Parameters . . . . . . . . . . . . . . . . . . . . . . . . . 16
9. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 17
9.1. Content-Format Registry . . . . . . . . . . . . . . . . . 17
9.2. Resource Type registry . . . . . . . . . . . . . . . . . 18
10. Security Considerations . . . . . . . . . . . . . . . . . . . 18
10.1. EST server considerations . . . . . . . . . . . . . . . 18
10.2. HTTPS-CoAPS Registrar considerations . . . . . . . . . . 19
11. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 20
12. Change Log . . . . . . . . . . . . . . . . . . . . . . . . . 20
13. References . . . . . . . . . . . . . . . . . . . . . . . . . 21
13.1. Normative References . . . . . . . . . . . . . . . . . . 21
13.2. Informative References . . . . . . . . . . . . . . . . . 22
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