Datagram Transport Layer Security (DTLS) Profile for Authentication and Authorization for Constrained Environments (ACE)
draft-ietf-ace-dtls-authorize-15
Document | Type | Active Internet-Draft (ace WG) | |
---|---|---|---|
Authors | Stefanie Gerdes , Olaf Bergmann , Carsten Bormann , Göran Selander , Ludwig Seitz | ||
Last updated | 2021-01-20 | ||
Replaces | draft-gerdes-ace-dtls-authorize | ||
Stream | IETF | ||
Intended RFC status | Proposed Standard | ||
Formats | plain text xml pdf htmlized (tools) htmlized bibtex | ||
Reviews | |||
Stream | WG state | Submitted to IESG for Publication | |
Document shepherd | Jim Schaad | ||
Shepherd write-up | Show (last changed 2020-01-01) | ||
IESG | IESG state | Waiting for Writeup::External Party | |
Action Holders |
(None)
|
||
Consensus Boilerplate | Yes | ||
Telechat date | |||
Responsible AD | Benjamin Kaduk | ||
Send notices to | Jim Schaad <ietf@augustcellars.com> | ||
IANA | IANA review state | Version Changed - Review Needed |
ACE Working Group S. Gerdes Internet-Draft O. Bergmann Intended status: Standards Track C. Bormann Expires: 24 July 2021 Universität Bremen TZI G. Selander Ericsson AB L. Seitz Combitech 20 January 2021 Datagram Transport Layer Security (DTLS) Profile for Authentication and Authorization for Constrained Environments (ACE) draft-ietf-ace-dtls-authorize-15 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 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 24 July 2021. Copyright Notice Copyright (c) 2021 IETF Trust and the persons identified as the document authors. All rights reserved. Gerdes, et al. Expires 24 July 2021 [Page 1] Internet-Draft CoAP-DTLS January 2021 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 carefully, as they describe your rights and restrictions with respect to this document. Code Components extracted from this document must include Simplified BSD License text as described in Section 4.e of the Trust Legal Provisions and are provided without warranty as described in the Simplified BSD License. Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3 1.1. Terminology . . . . . . . . . . . . . . . . . . . . . . . 4 2. Protocol Overview . . . . . . . . . . . . . . . . . . . . . . 4 3. Protocol Flow . . . . . . . . . . . . . . . . . . . . . . . . 6 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 . . . . . . 20 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 . . . . . . . . . . . . . . . . . . 24Show full document text