Session Class Encryption

[eluser]Unknown[/eluser]
I'm trying to find out what security provider(s) CodeIgniter uses for its encryption. I have a rather unorthodox setup with CodeIgniter running on top of Quercus, which is a Java framework that interprets PHP into Java and runs in it the JVM. There are reasons outside my control for which I am doing this (contractual obligation to use PHP but working in a Java shop that wants the back end in Java). Long story short, I get the error below when trying to access the site after loading the CI Session class and I believe the problem is that I need to declare the appropriate security provider in my JRE configuration to match what CI uses.

java.lang.RuntimeException: java.security.NoSuchAlgorithmException: Cannot find any provider supporting Rijndael256/ECB/NoPadding