Passgen is an simple Python WPA2 Password Generator, which is an alternative for the random character generator Crunch which attempts to solve cracking WPA/WPA2 keys by randomizing the output as opposed to generating a list like so (aaaaaaaa, aaaaaaab, aaaaaac, etc).
How to use Passgen Random Character Generator
Example usage with aircrack-ng:
|1||python passgen.py -l | sudo aircrack-ng –bssid 00:11:22:33:44:55 -w- WiFi.cap|
Of course John the Ripper (JTR) has some built in options for creating permutations from Wordlists.
You can download Passgen v0.3 here: