EST over secure CoAP (EST-coaps)
draft-ietf-ace-coap-est-00
ACE P. van der Stok
Internet-Draft Consultant
Intended status: Standards Track P. Kampanakis
Expires: September 1, 2018 Cisco Systems
S. Kumar
Philips Lighting Research
M. Richardson
SSW
M. Furuhed
Nexus Group
S. Raza
RISE SICS
February 28, 2018
EST over secure CoAP (EST-coaps)
draft-ietf-ace-coap-est-00
Abstract
Enrollment over Secure Transport (EST) [RFC7030] is used as a
certificate management protocol over HTTPS.
Low-resource devices often use the lightweight Constrained
Application Protocol (CoAP) [RFC7252] for message exchanges. This
document defines how to transport EST payloads over secure CoAP (EST-
coaps). This allows low-resource constrained devices to re-use
existing EST functionality. Example low-resource use cases for EST
are: secure bootstrapping and certificate enrollment.
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 September 1, 2018.
van der Stok, et al. Expires September 1, 2018 [Page 1]
Internet-Draft EST-coaps February 2018
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1. EST operational differences . . . . . . . . . . . . . . . 3
1.2. Terminology . . . . . . . . . . . . . . . . . . . . . . . 4
2. Conformance to RFC7925 profiles . . . . . . . . . . . . . . . 4
3. Protocol Design and Layering . . . . . . . . . . . . . . . . 5
3.1. Payload format . . . . . . . . . . . . . . . . . . . . . 6
3.2. Message Bindings . . . . . . . . . . . . . . . . . . . . 6
3.3. CoAP response codes . . . . . . . . . . . . . . . . . . . 6
3.4. Message fragmentation . . . . . . . . . . . . . . . . . . 7
3.5. Deployment limits . . . . . . . . . . . . . . . . . . . . 8
4. Discovery and URI . . . . . . . . . . . . . . . . . . . . . . 8
5. DTLS Transport Protocol . . . . . . . . . . . . . . . . . . . 10
6. Proxying . . . . . . . . . . . . . . . . . . . . . . . . . . 11
7. Parameters . . . . . . . . . . . . . . . . . . . . . . . . . 12
8. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 12
8.1. Content-Format registry . . . . . . . . . . . . . . . . . 12
8.2. Resource Type registry . . . . . . . . . . . . . . . . . 14
9. Security Considerations . . . . . . . . . . . . . . . . . . . 15
9.1. proxy considerations . . . . . . . . . . . . . . . . . . 15
9.2. EST server considerations . . . . . . . . . . . . . . . . 15
10. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 16
11. Change Log . . . . . . . . . . . . . . . . . . . . . . . . . 16
12. References . . . . . . . . . . . . . . . . . . . . . . . . . 16
12.1. Normative References . . . . . . . . . . . . . . . . . . 16
12.2. Informative References . . . . . . . . . . . . . . . . . 17
Appendix A. EST messages to EST-coaps . . . . . . . . . . . . . 19
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