OAuth 2.0 Assisted Token
draft-ideskog-assisted-token-04
Independent Submission J. Ideskog
Internet-Draft T. Spencer
Intended status: Informational Curity AB
Expires: 9 July 2021 5 January 2021
OAuth 2.0 Assisted Token
draft-ideskog-assisted-token-04
Abstract
This document extends the OAuth 2.0 framework to include an
additional authorization flow for single page applications called the
assisted token flow. It enables OAuth clients written in scripting
languages, like JavaScript, to request user authorization using a
simplified method compared to other flows. Communication does not
rely on redirection of the user agent, but instead leverages HTML's
iframe element, child windows, and the postMessage interface. This
communication is done using an additional endpoint, the assisted
token endpoint.
Note
To contribute to this draft, please feel free to create a pull
request from the original source available at
https://github.com/curityio/rfc (https://github.com/curityio/rfc/) or
email the authors.
This note is to be removed before publishing as an RFC.
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
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Internet-Drafts are draft documents valid for a maximum of six months
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material or to cite them other than as "work in progress."
This Internet-Draft will expire on 9 July 2021.
Ideskog & Spencer Expires 9 July 2021 [Page 1]
Internet-Draft Assisted Token January 2021
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document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 5
3. Assisted Token Endpoint . . . . . . . . . . . . . . . . . . . 6
3.1. Access Token Scope . . . . . . . . . . . . . . . . . . . 7
3.2. Cross-Origin Support . . . . . . . . . . . . . . . . . . 7
4. Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . 7
4.1. Assisted Token Request . . . . . . . . . . . . . . . . . 7
4.2. Assisted Token Response . . . . . . . . . . . . . . . . . 8
4.3. Error Response . . . . . . . . . . . . . . . . . . . . . 9
5. Client Metadata . . . . . . . . . . . . . . . . . . . . . . . 11
6. Authorization Server Metadata . . . . . . . . . . . . . . . . 11
7. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 12
7.1. OAuth URI Registration . . . . . . . . . . . . . . . . . 12
7.1.1. Registry Contents . . . . . . . . . . . . . . . . . . 12
7.2. OAuth Parameters . . . . . . . . . . . . . . . . . . . . 12
7.2.1. Registry Contents . . . . . . . . . . . . . . . . . . 12
7.3. OAuth 2.0 Authorization Server Metadata . . . . . . . . . 12
7.3.1. Registry Contents . . . . . . . . . . . . . . . . . . 12
8. Security Considerations . . . . . . . . . . . . . . . . . . . 13
8.1. Framing . . . . . . . . . . . . . . . . . . . . . . . . . 13
8.2. Handle Tokens . . . . . . . . . . . . . . . . . . . . . . 14
8.3. Warning Against Untrusted Scripts . . . . . . . . . . . . 14
8.4. Origin of Event and Authorization Server . . . . . . . . 15
8.5. Token Storage . . . . . . . . . . . . . . . . . . . . . . 15
8.6. Visibility of User Agent's Address Bar . . . . . . . . . 16
9. Privacy Considerations . . . . . . . . . . . . . . . . . . . 16
10. Normative References . . . . . . . . . . . . . . . . . . . . 16
11. Informative References . . . . . . . . . . . . . . . . . . . 17
Appendix A. Acknowledgements . . . . . . . . . . . . . . . . . . 18
Appendix B. Document History . . . . . . . . . . . . . . . . . . 18
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 19
Ideskog & Spencer Expires 9 July 2021 [Page 2]
Internet-Draft Assisted Token January 2021
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