openssl module for php

As of late, the company I work for, Community Connect, needs to extend the openssl php module and might be able to release the source. It is for RSA encryption, but in my own interest, i would like to add on the other types of algorithms to it too. I understand that there are more complex functions, such as encryption using PKCS8 (or was that 7) to encrypt with a public key, while using envelopes and SMIME. I would like to see simpler functions, such as straight RSA and DSA encryption/decryption, as well as cert creation as it exists in the openssl api. At the moment, RSA is the primary target for my needs. I would like to start ASAP, so please let me know of anything i should know or do before hand :) -spencer p p.s. Sorry for the repeat, i apparently need to learn how to use my email client properly.