Gluu Server supports U2F out of the box:
https://gluu.org/docs/ce/authn-guide/U2F/
Installation instructions:
https://gluu.org/docs/ce/authn-guide/U2F/
Installation instructions:
All I need is an openid server.
You can integrate your own backend LDAP server using the cache refresh feature: https://gluu.org/docs/ce/admin-guide/user-management/#ldap-s...
It is pretty beefy though, built for enterprise use cases.