LDAP AD and SAMCompatibleName

[Andrei Katsuk]

Currently I want to authenticate users who enter EXAMPLE\bob or bob at example.com.
Also I don't want to grant access to users who enter EXAMPLE.COM\bob
or bob at EXAMPLE.

To do this I defined two realms in proxy.conf:
realm example.com {
}
realm EXAMPLE {
}

and modify server configuration:

        suffix
        if (ok) {
                 find_dot_in_realm
                 if (notfound) {
                         reject
                 } else {
                        update control {
                                  &control:Tmp-String-0 :=
"(userPrincipalName=%{User-Name})"
                        }
                 }
        }
        ntdomain
        if (ok) {
                 find_dot_in_realm
                 if (ok) {
                         reject
                 } else {
                         update control {
                                &control:Tmp-String-0 :=
"(samaccountname=%{%{Stripped-User-Name}:-%{User-Name}})"
                         }
                 }
        }

where find_dot_in_realm defined in policy:

find_dot_in_realm_regexp = "^(.+)\.(.+)$"

find_dot_in_realm {
    if (Realm && (Realm =~ /${policy.find_dot_in_realm_regexp}/)){
        ok
    }
    else {
        notfound
    }
}

and defined filter for rlm_ldap configuration as

filter = &control:Tmp-String-0

Is it the right approach or something can be done in a better or easier way ?

Thanks,
Andrei