This is a GLAuth plugin; that is, a backend that are not compiled in GLAuth by default.
To quote 'Butonic' (Jörn Friedrich Dreyer):
Just keep the 'lightweight' in mind.
To build either back-end, type
make plugin_name
where 'name' is the plugin's name; so, for instance: make plugin_sqlite
To build back-ends for specific architectures, specify PLUGIN_OS and PLUGIN_ARCH --
For instance, to build the sqlite plugin for the new Mac M1s:
make plugin_sqlite PLUGIN_OS=darwin PLUGIN_ARCH=arm64
To authenticate against local users, edit the configuration file (see pkg/plugins/sample-pam.cfg) so that:
...
[backend]
datastore = "plugin"
plugin = "bin/pam.so"
...
When building this plugin, one must first ensure that the proper development headers are installed. For instance, on Ubuntu:
sudo apt-get install libpam0g-dev
You will likely also wish to tweak the groupWithSearchCapability setting, to assign an appropriate secondary group.
Then, to perform a search:
ldapsearch -LLL -H ldap://localhost:3893 -D cn=<unix user name>,ou=<a group the user belongs to>,dc=glauth,dc=com -w <unix user password> -x -bdc=glauth,dc=com cn=<unix user name>