Protecting EST Payloads with OSCORE
draft-selander-ace-coap-est-oscore-04
ACE Working Group G. Selander
Internet-Draft Ericsson AB
Intended status: Standards Track S. Raza
Expires: 6 May 2021 RISE
M. Furuhed
Nexus
M. Vucinic
T. Claeys
INRIA
2 November 2020
Protecting EST Payloads with OSCORE
draft-selander-ace-coap-est-oscore-04
Abstract
This document specifies public-key certificate enrollment procedures
protected with lightweight application-layer security protocols
suitable for Internet of Things (IoT) deployments. The protocols
leverage payload formats defined in Enrollment over Secure Transport
(EST) and existing IoT standards including the Constrained
Application Protocol (CoAP), Concise Binary Object Representation
(CBOR) and the CBOR Object Signing and Encryption (COSE) format.
Status of This Memo
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This Internet-Draft will expire on 6 May 2021.
Copyright Notice
Copyright (c) 2020 IETF Trust and the persons identified as the
document authors. All rights reserved.
Selander, et al. Expires 6 May 2021 [Page 1]
Internet-Draft EST-oscore November 2020
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1. Operational Differences with EST-coaps . . . . . . . . . 4
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 5
3. Authentication . . . . . . . . . . . . . . . . . . . . . . . 5
3.1. EDHOC . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.2. Certificate-based Authentication . . . . . . . . . . . . 6
3.3. Channel Binding . . . . . . . . . . . . . . . . . . . . . 6
3.4. Optimizations . . . . . . . . . . . . . . . . . . . . . . 7
3.5. RPK-based Trust Anchors . . . . . . . . . . . . . . . . . 7
4. Protocol Design and Layering . . . . . . . . . . . . . . . . 8
4.1. Discovery and URI . . . . . . . . . . . . . . . . . . . . 8
4.2. Distribution of RPKs . . . . . . . . . . . . . . . . . . 8
4.3. Mandatory/optional EST Functions . . . . . . . . . . . . 9
4.4. Payload formats . . . . . . . . . . . . . . . . . . . . . 9
4.5. Message Bindings . . . . . . . . . . . . . . . . . . . . 11
4.6. CoAP response codes . . . . . . . . . . . . . . . . . . . 11
4.7. Message fragmentation . . . . . . . . . . . . . . . . . . 11
4.8. Delayed Responses . . . . . . . . . . . . . . . . . . . . 11
5. HTTP-CoAP Proxy . . . . . . . . . . . . . . . . . . . . . . . 12
6. Security Considerations . . . . . . . . . . . . . . . . . . . 12
7. Privacy Considerations . . . . . . . . . . . . . . . . . . . 12
8. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 13
9. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . 13
10. References . . . . . . . . . . . . . . . . . . . . . . . . . 13
10.1. Normative References . . . . . . . . . . . . . . . . . . 13
10.2. Informative References . . . . . . . . . . . . . . . . . 14
Appendix A. Other Authentication Methods . . . . . . . . . . . . 16
A.1. TTP Assisted Authentication . . . . . . . . . . . . . . . 16
A.2. PSK Based Authentication . . . . . . . . . . . . . . . . 18
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