Ok, i did some more research (hard with little spare time i have), and i found about rainbowcrack which will let me make my own SHA1 hash table i need for wpa? On the official site i don't see nvidia cuda version for linux, only windows.
The hash must include SSID as well, correct? Those rainbow tables on the official site don't inlcude ssid for computation, making them useless for wpa?
Would anyone be kind to explain how to make the hash table defining only alphanumerical characters (with or without rainbowcrack program, but with cuda support). Am i on the right track for this? I'd like to do some company testing. Thx