3DES with repeating key

[jcat7]

I second that, my requirements are for legitimate pen testing purposes - But also I think it would be a useful addition for a password recovery tool, considering 3DES is certainly brute-forcible if the same key is applied for each encryption cycle, so why not! And it would be cool to demonstrate the weaknesses inherent in 3DES, especially if it's not properly implemented by using repeating keys.