Hey all, I'm looking to generate rainbow tables for a PoC. My client has decided that hashing (no salt) credit card numbers is a good idea. To prove him wrong I wrote a little script that will crack the SHA256 hash iteratively, but with a 9 digit account number (6 digit known bank bin + account number + check digit = 16 digit card number), this obviously takes a very long time.
To make the PoC more demonstrative, I'd like to gen some custom rainbow tables. I have the first 6 digits, and obviously the last digit will be a check digit. What is the best way to generate these tables?
Ive looked at winrtgen and rainbowcrack, but neither gives me the option to prefix the first 6 digits, much less generate the check digit. Any help would be greatly appreciated!
