Datagram Transport Layer Security (DTLS) Profile for Authentication and Authorization for Constrained Environments (ACE)
draft-ietf-ace-dtls-authorize-13
ACE Working Group S. Gerdes
Internet-Draft O. Bergmann
Intended status: Standards Track C. Bormann
Expires: March 12, 2021 Universitaet Bremen TZI
G. Selander
Ericsson AB
L. Seitz
Combitech
September 08, 2020
Datagram Transport Layer Security (DTLS) Profile for Authentication and
Authorization for Constrained Environments (ACE)
draft-ietf-ace-dtls-authorize-13
Abstract
This specification defines a profile of the ACE framework that allows
constrained servers to delegate client authentication and
authorization. The protocol relies on DTLS version 1.2 for
communication security between entities in a constrained network
using either raw public keys or pre-shared keys. A resource-
constrained server 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 March 12, 2021.
Copyright Notice
Copyright (c) 2020 IETF Trust and the persons identified as the
document authors. All rights reserved.
Gerdes, et al. Expires March 12, 2021 [Page 1]
Internet-Draft CoAP-DTLS September 2020
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
1.1. Terminology . . . . . . . . . . . . . . . . . . . . . . . 3
2. Protocol Overview . . . . . . . . . . . . . . . . . . . . . . 4
3. Protocol Flow . . . . . . . . . . . . . . . . . . . . . . . . 5
3.1. Communication Between the Client and the Authorization
Server . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.2. RawPublicKey Mode . . . . . . . . . . . . . . . . . . . . 7
3.2.1. Access Token Retrieval from the Authorization Server 7
3.2.2. DTLS Channel Setup Between Client and Resource Server 9
3.3. PreSharedKey Mode . . . . . . . . . . . . . . . . . . . . 10
3.3.1. Access Token Retrieval from the Authorization Server 10
3.3.2. DTLS Channel Setup Between Client and Resource Server 14
3.4. Resource Access . . . . . . . . . . . . . . . . . . . . . 16
4. Dynamic Update of Authorization Information . . . . . . . . . 18
5. Token Expiration . . . . . . . . . . . . . . . . . . . . . . 19
6. Secure Communication with an Authorization Server . . . . . . 19
7. Security Considerations . . . . . . . . . . . . . . . . . . . 20
7.1. Reuse of Existing Sessions . . . . . . . . . . . . . . . 21
7.2. Multiple Access Tokens . . . . . . . . . . . . . . . . . 22
7.3. Out-of-Band Configuration . . . . . . . . . . . . . . . . 22
8. Privacy Considerations . . . . . . . . . . . . . . . . . . . 23
9. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 23
10. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . 24
11. References . . . . . . . . . . . . . . . . . . . . . . . . . 24
11.1. Normative References . . . . . . . . . . . . . . . . . . 24
11.2. Informative References . . . . . . . . . . . . . . . . . 25
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 26
1. Introduction
This specification defines a profile of the ACE framework
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