Hey, I am c# and js dev, but this program I made in node.js is performance heavy, so I need it translated / recoded into C++.
In short, it loads up a file into a buffer. It than uses ICE library to try to decrypt a string provided with the bytes from the file. http://www.darkside.com.au/ice/ice-doc-C++.html
I will provide my node.js program so you know what to do, and also help with the library or potential details.