Add Additional Functionality To A C# Function That Decrypts Hole Cards For A Poker Bot

I have written a poker bot that plays no-limit Texas Holdem on the Poker Mavens poker platform by Briggs Softworks. The Poker Mavens server is written in Delphi XE5 and the client is written in HTML5/Javascript. The client and server communicate by sending JSON payloads back and forth over a websocket connection. There are 2 ways that a player (or bot) can login to the server, a username/password or a username/sessionKey. A sessionKey is an 80-bit key that is generated by the server that serves as a one-time-only password for an automated login. I have a function that can successfully decrypt the hole cards when a password is used, but it is not working correctly when a session key is used as the login method. I have the client javascript file that contains all the client functions and I will also provide my c# decryption function with assosciated unit tests that were created when the function was developed. I need someone experienced in Java and C# .Net to examine my current function as well as the client javascript file to determine what is needed to decrypt the hole cards using a session key login and then implement the solution into the existing function.