I am currently in the process of coming up with a PKCS#11 library with minimal functions such that my legacy HSM is able to support the Oracle database 11g transparent data encryption (TDE). I do not want to come up with the complete PKCS#11 library with all the functions since all I need is to support Oracle database. In addition, coding all functions will take too long a development effort and it would be an overkill in doing so.

Does anybody have any ideas as to which PKCS#11 functions does "Oracle Database 11g Release 2 (11.2)" makes use of for supporting TDE with HSM?