OpenScholar comes with integration with LDAP authentication servers out of the box. Site Administrators simply need to enable the LDAP Integration module, and then fill the settings for their LDAP authentication server on the appropriate admin page.
To facilitate LDAP integration, we have written the Openscholar LDAP module, which prevents anonymous users from creating a site. This module can be found at https://github.com/openscholar/openscholar_ldap and will be included in a future release of OpenScholar. This module offers no configuration options.