Group OSCORE Profile of the Authentication and Authorization for Constrained Environments Framework
draft-tiloca-ace-group-oscore-profile-04
ACE Working Group M. Tiloca
Internet-Draft R. Hoeglund
Intended status: Standards Track RISE AB
Expires: May 6, 2021 L. Seitz
Combitech
F. Palombini
Ericsson AB
November 02, 2020
Group OSCORE Profile of the Authentication and Authorization for
Constrained Environments Framework
draft-tiloca-ace-group-oscore-profile-04
Abstract
This document specifies a profile for the Authentication and
Authorization for Constrained Environments (ACE) framework. The
profile uses Group OSCORE to provide communication security between a
Client and a (set of) Resource Server(s) as members of an OSCORE
Group. The profile securely binds an OAuth 2.0 Access Token with the
public key of the Client associated to the signing private key used
in the OSCORE group. The profile uses Group OSCORE to achieve server
authentication, as well as proof-of-possession for the Client's
public key. Also, it provides proof of the Client's membership to
the correct OSCORE group, by binding the Access Token to information
from the Group OSCORE Security Context, thus allowing the Resource
Server(s) to verify the Client's membership upon receiving a message
protected with Group OSCORE from the Client.
Status of This Memo
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This Internet-Draft will expire on May 6, 2021.
Tiloca, et al. Expires May 6, 2021 [Page 1]
Internet-Draft Group OSCORE Profile of ACE November 2020
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1. Terminology . . . . . . . . . . . . . . . . . . . . . . . 6
2. Protocol Overview . . . . . . . . . . . . . . . . . . . . . . 6
2.1. Pre-Conditions . . . . . . . . . . . . . . . . . . . . . 9
2.2. Access Token Retrieval . . . . . . . . . . . . . . . . . 9
2.3. Access Token Posting . . . . . . . . . . . . . . . . . . 10
2.4. Secure Communication . . . . . . . . . . . . . . . . . . 10
3. Client-AS Communication . . . . . . . . . . . . . . . . . . . 11
3.1. C-to-AS: POST to Token Endpoint . . . . . . . . . . . . . 11
3.1.1. 'context_id' Parameter . . . . . . . . . . . . . . . 13
3.1.2. 'salt_input' Parameter . . . . . . . . . . . . . . . 13
3.1.3. 'client_cred_verify' Parameter . . . . . . . . . . . 13
3.2. AS-to-C: Access Token . . . . . . . . . . . . . . . . . . 14
3.2.1. Salt Input Claim . . . . . . . . . . . . . . . . . . 17
3.2.2. Context ID Input Claim . . . . . . . . . . . . . . . 17
4. Client-RS Communication . . . . . . . . . . . . . . . . . . . 17
4.1. C-to-RS POST to authz-info Endpoint . . . . . . . . . . . 18
4.2. RS-to-C: 2.01 (Created) . . . . . . . . . . . . . . . . . 18
4.3. Client-RS Secure Communication . . . . . . . . . . . . . 19
4.3.1. Client Side . . . . . . . . . . . . . . . . . . . . . 19
4.3.2. Resource Server Side . . . . . . . . . . . . . . . . 19
4.4. Access Rights Verification . . . . . . . . . . . . . . . 20
5. Secure Communication with the AS . . . . . . . . . . . . . . 20
6. Discarding the Security Context . . . . . . . . . . . . . . . 21
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