End user

(Resource Owner)


OIDC Client

OIDC Provider

 IDP Service option

Additional Info

Supplementary Service

(Resource Server)

1: login request

1: click login

2: redir: authorize request

2:authorize request

3: redir: auth request




7: init idp session

3: auth request


4: get session params

9: idp gui

10: idp auth

11: auth response


16: redir: authorize response

16: authorize response


12: redir: consent request

12:  consent request

14: consent gui


13: get scopes

15: consent response


17: get access token

18 userinfo request

22: login response

20: get additional info

21: userinfo response



6: idp init request

8: idp init response







Open session with

OIDC Provider

Analyze OIDC session params to determine IDP handling

Open session with IDP service

Complete session with IDP service

10: interact with

idp gui

14: interact with

consent gui

5: idp selector

5: interact with

selector gui

Close session with

OIDC Provider and

return ID Token

(hybrid flow)

Analyze OIDC session scopes


User is authenticated with OIDC Provider via selected IDP Service

IDP Service re-directs  back to OIDC Provider

User is authenticated and has given consented access to additional info

Retrieve additional info on user based on consent

Return Access Token to be used in request for additional info


19: validate access token