some memberUid in my database are hashed

Hi,

I've an openldap database I use for auth purposes in which some memberUid is hashed while other not, e.g.:

(results given by sudo ldapsearch -LLL -Y EXTERNAL -H ldapi:/// -b ou=Groups,dc=unit,dc=company,dc=net) .......................... dn: cn=GROUP,ou=Groups,dc=unit,dc=company,dc=net objectClass: top objectClass: posixGroup cn: GROUP gidNumber: 1026 memberUid: firstuser memberUid:: IGFyaWFubmE= [...] ...........................

I cannot find any documentation about this kind of "memberUid hashed storage", the only differece is the double colon after memberUid

please can you point me to the documentation or tell me how to "decode" the memberUid information

also, on a client machine configured to use libnss-ldapd, if I list the groups with "sudo getent group" I can see the "clear text" members (e.g. firstuser in the example above) but not the "hashed" one; the same using the "members" command

ciao Giovanni