#!/bin/sh
#
# Wi-Fi Security: Attack and Defense
# by by ternarybit (austindcc@gmail.com)
# 2600 Magazine, Vol. 30, No. 4
#
# Filename: netgear-psk.sh
# Usage: ./netgear-psk.sh adj-verbs animals numbers netgear.lst
#
# NETGEAR has not randomly chosen any two words - they are two fairly common 
# words in a grammatically correct order.  After some searching and hacking, 
# I came up with a reasonably comprehensive list of common adjectives and 
# present-tense verbs which came to only 1,715 words.  A list of common animals
# came in much smaller, at only 171 words.  I didn't include highly esoteric 
# animals (like archaeopteryx), or very specific ones (like saber-toothed tiger
# - just tiger).  I also didn't include adjectives or verbs that a NETGEAR 
# customer would view as offensive or inappropriate.  Somehow, PSKs like 
# 'murderinglion666' and 'sexygorilla690' seem unlikely.  I used Crunch in 
# much the same way as the example above to create a list of all 1,000 
# 3-digit numbers, and wrote this simple script to combine them into a master
# PSK list.

PRE=$1
SUF=$2
NUM=$3
OUT=$4

echo "Creating a list of all combinations of the files: \033[01;32m$PRE + $SUF + $NUM\033[00m"
echo "And saving in wordlist file: \033[01;32m$OUT\033[00m"

TOTAL=$(expr $(wc -l < $PRE) '*' $(wc -l < $SUF) '*' $(wc -l < $NUM))

echo
echo "Total combinations: \033[01;32m$TOTAL\033[00m"
echo "\033[01;31mFor large dictionaries, this will take significant time and disk space.\033[00m"
echo

while read PREFIX
  do
    while read SUFFIX
      do
        while read NUMBER
          do
            echo $PREFIX$SUFFIX$NUMBER >> $OUT
          done < $NUM
      done < $SUF
  done < $PRE
  echo "Done."
  exit 0