I have an 8 character password, I know it has 2 upper, 2 lower, 2 digits, 2 special. How do I make a mask?
UPDATE:
Thank you all for your help!
Yes, look at the link kiara provided and learn how to use that tool.
You need to generate all combinations of the masks and feed that mask file to HC.
I'm not that good at combinatorics, but I get a feeling the total number of combinations are 8! (factorial function).
8*7*6*5*4*3*2*1
So it's a couple of masks. But it's doable.