Using Crunch with a partially known password
 

Hello, first time poster here.

Problem/challenge

I've recently been asked to help someone break a password on a sparse bundle they had encrypted on OS X. The issue I am having is generating a tailored dictionary/word list with Crunch on Ubuntu.

The person is reasonably sure they know what letters and characters were used in the password and in fact the first 3 characters of the password. What they are not sure of is the exact length (6-10) or the case combo. So what I really need is basically case permutations of a character set with a multi length password. They used some combination of reused password and just can't remember the details.

I have been unable to see how Crunch can help me with this, as it appears that the permutation function does not account for case and also requires exact length. So I cannot provide Crunch with the character set and have it provide every case permutation of the character set with multiple lengths.

Question

Is there some functionality or method of doing this with Crunch that I am missing?

If not, are there other dictionary/word list programs out there that may be able to help with this?

Any help would be great. This is my first dive into the world of password cracking and it's been most exciting and interesting. Thanks!

This looks like a simple programming question. Make a permutation of each set of characters you want, of each length you want, and throw the whole lot into your wordlist.

Thanks for the reply. I was kind of hoping that wasn't the answer. Well, no choice but to brush up on some programming it seems.