I'm very happy with OpenLDAP.

I have the following scenario:

I need to have a back to support

1. Usernames

2. Groups

3. Passwords of usernames

4. password of groups

And some CN

dn: uid=testaccount,xxxxxxxx loginShell: /sbin/nologin gidNumber: 3231 uidNumber: 8096 uid: testaccount objectClass: top objectClass: posixAccount objectClass: account objectClass: systemQuotas homeDirectory: cn: testaccount structuralObjectClass: account userPassword:: xxxxxxxxxxxxxxxxxxxxxx

Note:

Not only I don't want to use /etc/passwd and local authentication, but also I need to virtual {user,account}.

Use sssd for this