@startuml
title "OpenID Connect Authorization Code Flow"
actor "End User"
boundary "Browser"
"Relaying party"->"Browser": Identity providers list
"End User"->"Browser": Select identity provider
"Browser"->"Relaying party": Identity provider clicked
"Relaying party"->"Browser": Redirect to identity provider with clientid, state,redirect_uri,response_type,scope<font color=red>+"openid"
"Browser"->"Authorization endpoint": clientid,state,redirect_uri,response_type,scope
"Authorization endpoint"->"Authorization endpoint": Active session ?
"Authorization endpoint"-->"Browser" : Login if no active session
"End User"-->"Browser" : Fills credentials
"Browser"-->"Authorization endpoint" : Logs in
"Authorization endpoint"->"Browser": Form for consent for each scope
"End User"->"Browser": Grant or deny permission for each scope
"Browser"->"Authorization endpoint" :Selected scopes
"Authorization endpoint"->"Browser": Redirect to redirect_uri with authorization code+state provided earlier
"Browser"->"Relaying party": Redirect to redirect_uri with authorization code
"Relaying party"->"Token endpoint": Send authorization code, clientid, client_secret, redirect uri (for validation)
"Token endpoint"->"Relaying party": Send access token<font color=red>+"idtoken"
"Relaying party"->"UserInfo endpoint": Asks for profile with access token
"UserInfo endpoint"->"Relaying party": Return profile
"Relaying party"->"Browser": Display profile

@enduml