Message Queuing Telemetry Transport (MQTT)-TLS profile of Authentication and Authorization for Constrained Environments (ACE) Framework
draft-ietf-ace-mqtt-tls-profile-10
| Document | Type | Active Internet-Draft (ace WG) | |
|---|---|---|---|
| Authors | Cigdem Sengul , Anthony Kirby | ||
| Last updated | 2020-12-18 | ||
| Replaces | draft-sengul-ace-mqtt-tls-profile | ||
| Stream | Internent Engineering Task Force (IETF) | ||
| Intended RFC status | Proposed Standard | ||
| Formats | plain text pdf htmlized (tools) htmlized bibtex | ||
| Stream | WG state | Submitted to IESG for Publication | |
| Document shepherd | Daniel Migault | ||
| Shepherd write-up | Show (last changed 2020-12-18) | ||
| IESG | IESG state | Publication Requested | |
| Action Holders |
(None)
|
||
| Consensus Boilerplate | Yes | ||
| Telechat date | |||
| Responsible AD | Benjamin Kaduk | ||
| Send notices to | Daniel Migault <daniel.migault@ericsson.com> | ||
ACE Working Group C. Sengul
Internet-Draft Brunel University
Intended status: Standards Track A. Kirby
Expires: June 21, 2021 Oxbotica
December 18, 2020
Message Queuing Telemetry Transport (MQTT)-TLS profile of Authentication
and Authorization for Constrained Environments (ACE) Framework
draft-ietf-ace-mqtt-tls-profile-10
Abstract
This document specifies a profile for the ACE (Authentication and
Authorization for Constrained Environments) framework to enable
authorization in a Message Queuing Telemetry Transport (MQTT)-based
publish-subscribe messaging system. Proof-of-possession keys, bound
to OAuth2.0 access tokens, are used to authenticate and authorize
MQTT Clients. The protocol relies on TLS for confidentiality and
MQTT server (broker) authentication.
Status of This Memo
This Internet-Draft is submitted in full conformance with the
provisions of BCP 78 and BCP 79.
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This Internet-Draft will expire on June 21, 2021.
Copyright Notice
Copyright (c) 2020 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
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Sengul & Kirby Expires June 21, 2021 [Page 1]
Internet-Draft MQTT-TLS profile of ACE December 2020
to this document. Code Components extracted from this document must
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1. Requirements Language . . . . . . . . . . . . . . . . . . 4
1.2. ACE-Related Terminology . . . . . . . . . . . . . . . . . 4
1.3. MQTT-Related Terminology . . . . . . . . . . . . . . . . 5
2. Authorizing Connection Requests . . . . . . . . . . . . . . . 7
2.1. Client Token Request to the Authorization Server (AS) . . 8
2.2. Client Connection Request to the Broker (C) . . . . . . . 9
2.2.1. Client-Server Authentication over TLS and MQTT . . . 9
2.2.2. authz-info: The Authorization Information Topic . . . 10
2.2.3. Transporting Access Token Inside the MQTT CONNECT . . 11
2.2.4. Authentication Using AUTH Property . . . . . . . . . 14
2.2.4.1. Proof-of-Possession Using a Challenge from the
TLS session . . . . . . . . . . . . . . . . . . . 14
2.2.4.2. Proof-of-Possession via Broker-generated
Challenge/Response . . . . . . . . . . . . . . . 15
2.2.5. Token Validation . . . . . . . . . . . . . . . . . . 16
2.2.6. The Broker's Response to Client Connection Request . 16
2.2.6.1. Unauthorised Request and the Optional
Authorisation Server Discovery . . . . . . . . . 17
2.2.6.2. Authorisation Success . . . . . . . . . . . . . . 17
3. Authorizing PUBLISH and SUBSCRIBE Messages . . . . . . . . . 17
3.1. PUBLISH Messages from the Publisher Client to the Broker 18
3.2. PUBLISH Messages from the Broker to the Subscriber
Clients . . . . . . . . . . . . . . . . . . . . . . . . . 19
3.3. Authorizing SUBSCRIBE Messages . . . . . . . . . . . . . 19
4. Token Expiration, Update and Reauthentication . . . . . . . . 20
5. Handling Disconnections and Retained Messages . . . . . . . . 20
6. Reduced Protocol Interactions for MQTT v3.1.1 . . . . . . . . 21
6.1. Token Transport . . . . . . . . . . . . . . . . . . . . . 21
6.2. Handling Authorization Errors . . . . . . . . . . . . . . 22
7. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 23
8. Security Considerations . . . . . . . . . . . . . . . . . . . 24
9. Privacy Considerations . . . . . . . . . . . . . . . . . . . 25
10. References . . . . . . . . . . . . . . . . . . . . . . . . . 25
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