#!/bin/bash

weakString="Weak Password"
strongPassword="Strong Password"

isWeakPassword() {
	password=$1
	
	#Minimum length of 8 characters
	if [ ${#password} -lt 8 ]
	then
		echo "$password: $weakString"
		return
	fi
	
	#Must contain at least one numeric character
	if [ `echo $password | grep -c -E "[0-9]+"` -eq 0 ]
	then
		echo "$password: $weakString"
		return	
	fi
	
	#Must contain at least one of the following non-alphabetic characters: @, #, $, %, &, *, +, -, =
	if [ `echo $password | grep -c -E "[@#$%&*=+-]+"` -eq 0 ]
	then
		echo "$password: $weakString"
		return	
	fi
	
	#Do a dictionary check on every sequence of at least four consecutive alphabetic characters in the password under test. This will eliminate passwords containing embedded "words" found in a standard dictionary.
	for((i=4;i<=${#password};i++))
	do
		for((j=0;j<=${#password}-$i;j++))
		do
			if [ `grep -c -E "^${password:$j:$i}$" dictionary.txt` -gt 0 ]
			then
				echo "$password: $weakString"
				return
			fi
		done
	done
	
	#All checks done. 
	echo "$password: $strongPassword"
}

while [ ${#1} -gt 0 ]
do
	isWeakPassword $1
	shift 1
done