Sorry for doing a necro, but this is a great little bit of code!  Sucks the private keys directly out of a drive, does not care about file system, OS's or anything!  I just had to sub to it.

I have already put it onto my Recovery USB and tested several different scenarios.  Any ideas on how/when you are going to implement support for encrypted wallets?  I think that encrypted wallets is the last thing left and then this will be the ultimate key recovery tool.

Thanks