If you are trying to reproduce a key this is not the way to do it.

As for the internal mechanism - I couldn't tell you.

Use a PRNG directly, or use a hash to generate a passphrase.   But if you
are consistently seeding a PRNG the same expecting an external mechanism to
respond consistently - it is a violation of basic OOP principals - using a
component in a way it is not intended.

Maybe you should ask how you can accomplish what you are trying instead of
jumping ahead to a solution and asking if it will work.

--
LTP