Reversing an eBook reader

[5Alive]

I have a e-book reader which uses an undocumented security handler plugin which I'd like to reverse.

I would like to write a command line utility similar to GUAPDF which decrypts and saves the PDF so that it can be read by Acrobat Reader without the plug-in. Passwords for the documents are known apriori.

Before I go into any great detail I was wondering if anyone on the forum might have any experience in putting an idea like this into practice?

5Alive.