Does Ghost support OIDC or SAML SSO protocol?

I got some clue on the implementation of OAuth2 on Ghost, I’ve planned to integrate SSO for the admin site but with OIDC or SAML protocol. So my questions are

  • Does Ghost support these protocols?
  • Is it possible to use the existing authentication endpoint as a callback? or do I have to add a new endpoint by modifying the Ghost core to be able to use it to configured and receive the callback from the ID provider?
  • How can I add a redirection from the admin authentication flow to the ID provider login page?