Got whirlpool hash working with chunking. I got the python port of the hash from this one site, and it looked pretty exact with the C source. The guy who did the python port I guess assumed that the adding to the hash function worked the same as update in hashlib, so he wrapped similar, but this just wasn't the case. With a little analyzation, I was able to adapt the algorithm to mimic hashlib's update and allow for proper hashing of chunked data. Now the hash comes out correct whether chunked or not.
It works pretty good checksumming the average source code files, but if you try this on a 3MB file, it will take a bit because it is straight Python, and the algorithm is fairly complex. Because of this, I went ahead and added checksum threading. So if you are checksumming a really large file, you will see the progress in the status bar. If you want to cancel, just run the checksum command again, and the current thread will be canceled.
I am only adding these hashes because I am finding it fun figuring these out. I may allow in the future to tap in to these functions to generate hashes from selected strings etc, which is useful if you need to generate hashes in your source code. Maybe I will split out the hash code into its own plugin; we will see.
I will probably commit the whirlpool hash along with the checksum threading tomorrow.