That aside, why is nextcloud asking for scopes from remote API in the diagram? What is drawn on the diagram has little to do with OAuth scopes, but rather looks like an attempt to wrap ACL repository access into a new vocabulary.
Scopes issued by the OAuth authorization server can be hidden entirely. The issuer doesn’t hold any obligation to share them with authorized party since they are dedicated for internal use and can be propagated via invisible or opaque means.
I really can’t figure out what’s going on with that diagram.
https://oauth.net/articles/authentication/
That aside, why is nextcloud asking for scopes from remote API in the diagram? What is drawn on the diagram has little to do with OAuth scopes, but rather looks like an attempt to wrap ACL repository access into a new vocabulary.
Scopes issued by the OAuth authorization server can be hidden entirely. The issuer doesn’t hold any obligation to share them with authorized party since they are dedicated for internal use and can be propagated via invisible or opaque means.
I really can’t figure out what’s going on with that diagram.
The email address scope is commonly used as a shared identifyer for linking accounts.
Thank you for answering this person, it amazes me how little people know of oauth, and it’s not a new tech.