Ron and all,
I just published a framework for decoding and decrypting PKCS12 files, in order to gain access t the private key. It is pretty hackish, since I assume encryption algorithms, the private key is RSA and the like, but it works for the example file you gave me, Ron.
Load all current packages from the repository and then run:
(Pkcs12PrivateKeyFileReader fromFile: pkcs12FileName) asPrivateKey
and it will return the RSAPrivateKey. That KDF was a bitch!
cheers, Robert