I actually solved the "get the data out from the homebanking system" via 100 lines of javascript executed in phantomjs to screenscrape the site.

It isn't pretty, it might break, and I haven't looked into how to store the credentials "safely" (so it executes just when I call it and enter the u/p, and not in the background), but it beats the hell out of logging in and extracting the data by hand.

You might get some mileage of this, if you want to automate the data extraction and have an homebanking account.