Datagram Transport Layer Security (DTLS) Profile for Authentication and Authorization for Constrained Environments (ACE)
draft-ietf-ace-dtls-authorize-01
ACE Working Group S. Gerdes
Internet-Draft O. Bergmann
Intended status: Standards Track C. Bormann
Expires: January 4, 2018 Universitaet Bremen TZI
G. Selander
Ericsson
L. Seitz
RISE SICS
July 03, 2017
Datagram Transport Layer Security (DTLS) Profile for Authentication and
Authorization for Constrained Environments (ACE)
draft-ietf-ace-dtls-authorize-01
Abstract
This specification defines a profile for delegating client
authentication and authorization in a constrained environment by
establishing a Datagram Transport Layer Security (DTLS) channel
between resource-constrained nodes. The protocol relies on DTLS for
communication security between entities in a constrained network. A
resource-constrained node can use this protocol to delegate
management of authorization information to a trusted host with less
severe limitations regarding processing power and memory.
Status of This Memo
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This Internet-Draft will expire on January 4, 2018.
Copyright Notice
Copyright (c) 2017 IETF Trust and the persons identified as the
document authors. All rights reserved.
Gerdes, et al. Expires January 4, 2018 [Page 1]
Internet-Draft CoAP-DTLS July 2017
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
1.1. Terminology . . . . . . . . . . . . . . . . . . . . . . . 3
2. Protocol Overview . . . . . . . . . . . . . . . . . . . . . . 3
2.1. Unauthorized Resource Request Message . . . . . . . . . . 5
2.2. AS Information . . . . . . . . . . . . . . . . . . . . . 6
2.3. Resource Access . . . . . . . . . . . . . . . . . . . . . 7
2.4. Dynamic Update of Authorization Information . . . . . . . 8
3. RawPublicKey Mode . . . . . . . . . . . . . . . . . . . . . . 9
4. PreSharedKey Mode . . . . . . . . . . . . . . . . . . . . . . 10
4.1. DTLS Channel Setup Between C and RS . . . . . . . . . . . 11
4.2. Updating Authorization Information . . . . . . . . . . . 13
5. Security Considerations . . . . . . . . . . . . . . . . . . . 13
5.1. Unprotected AS Information . . . . . . . . . . . . . . . 14
5.2. Use of Nonces for Replay Protection . . . . . . . . . . . 14
5.3. Privacy . . . . . . . . . . . . . . . . . . . . . . . . . 14
6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 14
7. References . . . . . . . . . . . . . . . . . . . . . . . . . 14
7.1. Normative References . . . . . . . . . . . . . . . . . . 14
7.2. Informative References . . . . . . . . . . . . . . . . . 15
7.3. URIs . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 16
1. Introduction
This specification defines a profile of the ACE framework
[I-D.ietf-ace-oauth-authz]. In this profile, a client and a resource
server use CoAP [RFC7252] over DTLS [RFC6347] to communicate. The
client uses an access token, bound to a key (the proof-of-possession
key) to authorize its access to the resource server. DTLS provides
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