2021/Pop-ups/IndieAuth

IndieAuth 2021 was an IndieWebCamp Pop-ups 2021 session held 2021-08-28.

• Video: ▶️02:06:59s

Summary

It's been a year since the last IndieAuth protocol session. This popup IndieWebCamp session will focus on discussions to iterate and evolve the IndieAuth protocol.

Details

• facilitators: Aaron Parecki
• Date: 2021-08-28
• Time: 11:00 Pacific
• event: https://events.indieweb.org/2021/08/indieauth-popup-session-8gwaJpICmh79
• hashtag: #indieauth
• Notes archived from: https://etherpad.indieweb.org/2021-08-indieauth-popup

Possible Topics

• Client Information Discovery improvements.
  • Should this solely rely on Microformats? https://github.com/indieweb/indieauth/issues/23
  • What should be displayed if no app info discovered? https://github.com/indieweb/indieauth/issues/64. #23 suggests other fields that might be relevant, such as the icon and name from the page.
• Discuss whether IndieAuth adopt resource indicators(https://github.com/indieweb/indieauth/issues/82) as a notation, and note any specific considerations for IndieAuth. Even though Ticket Auth prompted this, this is not specifically a Ticket Auth issue.
• Should Ticket Auth, as an IndieAuth extension, be discussed at this event? If so...
  • Proposal to support the optional extension action=ticket to a token endpoint related to Ticket Auth. https://github.com/indieweb/indieauth/issues/87
• Introduce OAuth Server Metadata https://github.com/indieweb/indieauth/issues/43

Discussed

• Adding editorial notations to the spec regarding token lifetime, expiration and refresh tokens, to reference the OAuth2 specifications on this, and any specific considerations for IndieAuth. https://github.com/indieweb/indieauth/issues/81
• Deprecate / remove the IndieAuth token verify endpoint, requiring IndieAuth servers to align with RFC7662 for OAuth2 Token Introspection
• Make IndieAuth token verify endpoint credentialed, so it is clear that this should only be used by Resource Servers
• Clarification on issuing tokens with only profile scopes. https://github.com/indieweb/indieauth/issues/62
• Allow clients to always exchange authorization codes at the token endpoint https://github.com/indieweb/indieauth/issues/58

Notes

Possible topics are visible at https://indieweb.org/2021/Pop-ups/IndieAuth.

• https://github.com/indieweb/indieauth/issues/81 and expiry:
  •   Jamie Tanna supports expiration, and issuing of `refresh_token`
  • Discussion about whether we should add information about how to handle errors as an IndieAuth app (see RFC6749#7.2) https://github.com/indieweb/indieauth/issues/89
•   Jamie Tanna would like to discuss "Deprecate / remove the IndieAuth token verify endpoint" and moving the spec to be further aligned with OAuth2
• https://github.com/indieweb/indieauth/issues/33 - align/adopt RFC7662 token introspection
  •   Jamie Tanna has implemented this, and integrated this using the Spring Security and rack-oauth2 OAuth2 clients, and allows for using empty authentication (which could then be HTTP Basic Auth)
  • Recommendation is to not require authentication
    • At some point we should look into this though?
  • Recommendation is to provide this under the token endpoint
    • Does this make sense? Why does RFC7662 expect it to be a separate endpoint?
    • Aaron Parecki: it can be under the same endpoint, but Discovery endpoint could point to the same one
    •   Jamie Tanna should we make it clear in the docs that it could be different
  • should `sub` be a property in the response?
    •   Jamie Tanna for example has:

{"active":true,"me":"https://www.staging.jvt.me/","scope":"draft","token_type":"Bearer","client_id":"https://tokens-pls.herokuapp.com","exp":1630780771,"iat":1630175971,"iss":"https://indieauth.jvt.me","aud":["https://www-api.jvt.me/"],"sub":"https://www.staging.jvt.me/"}

• • • parked for now, as it's OPTIONAL and unclear if we need it for OAuth2 resource servers to integrate
  • Authentication is likely to be required, but in practice, requires further investigation (see below)

• Make IndieAuth token verify endpoint credentialed, so it is clear that this should only be used by Resource Servers
  • Aaron Parecki would like this to be some sort of dynamic client registration / "enrollment" that happens automagically when i.e. setting up a relationship with Aperture
  • Discussion as to whether i.e. Aperture / other shared platforms could lead to needing some out-of-band authentication sharing - follow-up investigation required

•   Jamie Tanna notes that, while integrating his IndieAuth server with OAuth2 clients, he found that the token_endpoint (not the token introspect endpoint, as mentioned on the call) may require `client_id` to be retrieved from `Authorization: Basic ...`, depending on how they work