how to crack wpa keys, without it is in dictionary.

it only saw brute-force .

how precompute the hashes ? only software for this ?

i already used the distributed passoword recovery, in some cases it functions very well

it is possible with cowpatty ?

passwords between 1 and 12 caracters only lowcase caracters and digits
its possible crack ?

what the time estimated ?

sorry for my english ...

thanks in advance