space padded strings

Hi all - All of the strings in PKCS11 are currently space padded and NOT Null terminated.
Does anyone recall the background as to why we did that?
Do we still need to?
Thanks!
Valerie

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Valerie Fenwick, http://bubbva.blogspot.com/ @bubbva Solaris Cryptographic & Key Management Technologies, Manager Oracle Corporation: 4180 Network Circle, Santa Clara, CA, 95054.