LDAP PASSWORD HASH

I use freeradius 2.0.2 with PEAP and MSCHAPv2 for authentication. I want to authenticate on LDAP database, but these protocols only read clear-text or hashes of the passwords on LDAP database. My question is: how do I make hashes of the passwords stored on LDAP?? Can I use SHA-256 for hashing??? Grateful, Eduardo.