`UserInfo` endpoint lookup never returns

As part of the OIDC login flow, during the backchannel exchange to get the access and id token (assuming you are in the auth code flow, but that's not relevant to the issue), one can perform a check against the UserInfo endpoint of the OIDC provider to check that the sub claim of the obtained ID token matches the one of the userinfo associated to the access token.

However, in the case of NSS, a lookup at https://inrupt.net/.well-known/openid-configuration shows that the userinfo endpoint exists, but a GET to https://inrupt.net/userinfo just hangs, and never get either a success or an error response. This prevents proper functioning of some OIDC libraries, and requires to be worked around. Should this be fixed in the NSS repo, or rather at the oidc-op level ?

Reproduisez la requête GET qui reste bloquée sur https://inrupt.net/userinfo et comparez-la avec l’endpoint annoncé dans https://inrupt.net/.well-known/openid-configuration. Déterminez si NSS ou oidc-op est responsable du comportement de UserInfo ; la tâche est terminée lorsque l’endpoint renvoie soit une réponse de succès, soit une réponse d’erreur, afin que les bibliothèques OIDC puissent terminer leur validation.