Specify characters that will be used in password recovery

[puujee12]

Hello, I was wondering that, is it possible to specify characters that will be used in password recovery? I'm trying to recover password with 28 length and I know that this password uses Decimals and upper-case Hexadecimal characters only. Even though there is ?u?d option it will take very long time.

[kimci86]

Hi, yes you can specify a character set explicitly as a list of characters. Sequences with a question mark are shortcuts.
For uppercase hexadecimal digits, you can use 0123456789ABCDEF, or in short ?dABCDEF.

[kimci86]

As a side note, I have been working some more one password recovery recently.
Improvements should be coming in the next few days 🤞 such as being able to specify an exact password length, which would be useful in your case.

[puujee12]

Thank you very much for your fast reply and incredible tool xD

[kimci86]

With the current version on master branch (build artifacts available here), you can use:
bkcrack -k X Y Z --bruteforce ?dABCDEF --length 28

[kimci86]

Note that exploring this search spaces of $16^{28} \approx 5.19\times10^{33}$ candidates will takes a few billion years.