The LDAP proxy is designed to be the part of the email encryption infrastructure which would simplify finding and using public encryption keys contained in X.509 public certificates.
Yap2lc (Yet Another Passwd 2 LDIF Converter) is an LDAP migration tool, which extracts information from passwd, shadow/passwd, and master.passwd formatted files, filters out unwanted/misshapen accounts and writes an LDIF file for easy importing.