Authenticated users can create new entries but then only creator can modify entry

Hi,

In the proccess of setting up an openldap server as a pgp key server, I want to grant access to every authenticated user to create a new entry in a subtree of the basedn and every body to read entries in that subtree but only creator to be able to modify his entries.

I tried with the following (unsuccessfully):

access to dn.children="ou=PGP Keys,o=SNCFT,c=TN" by dn.regex="^uid=([^,]+),(ou=[^,]+,)+ou=Users,o=SNCFT,c=TN$" selfwrite by dn.regex="^uid=([^,]+),ou=Users,o=SNCFT,c=TN$" write by * read

and also by dnattr=owner selfwrite by users write by * read

but none worked.

I am running openldap-2.3.27-8.el5_2.4 TIA Fathi B.N.