pw.sh

#! /bin/bash
#Author: Dylan Ivan Hubbard
#Name: PasswordGenerator


##########################################################################################################


                GENERROR1 (){


# Creating our error function which will inform the user on the correct script usage.
# tpuf setaf will display our guidelines in a distinctive color, allowing the
# user to recognize it properly.

###########################################################################################################

    tput setaf 3

        echo -e "Password is incorrect, guidelines provided: \n"

   echo -e " MUST contain at least 1 digit
        MUST contain at least 1 uppercase character
        MUST contain at least 1 lowercase character
        MUST contain ONE special character
        MUST be a minimum of 8 characters long

            Have a g'day, mate. "


    tput setaf 7

exit 0

}

##########################################################################################################################################
#PASSWORD FUNCTION



                PASSWORDGEN (){

    tput setaf 2


   echo -n "Here is your password, eh: "


    pick() { echo ${1:RANDOM%${#1}:1}; }


{

        pick '@#$%&*+-='
         pick '0123456789'
                pick 'abcdefghijklmnopqrstuvwxyz'
                    pick 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'



        for i in $( seq 1 $(( 4 + RANDOM % 8 )) )


do



pick '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'




             done







      } | sort -R | tr -d '\n'




      echo ""




tput setaf 7


                 exit 1

         }

##################################################################################################################################

# Assuming the user enters a password and not a parameter such as "-h", we will check the length of the password entered,
# It cannot be less than 8 characters and not more than 16.

        if [ $# -eq 1 ]



                  then



          USERPASSWORD=$(echo -n $1 | wc -c)



                   fi






       if  [[ $USERPASSWORD -gt 16  ||  $USERPASSWORD -lt 8 ]]


                then



                echo "Error - Invalid Length - $1"



                  error=1


                    fi









###################################################################################################################################


# Here we will read what the user's input is, we will check if the first
# positional parameter contains any characters, if not, we will generate a
# password for the user according to our guidelines, but if -h is our
# parameter, our script will list the guidelines in order, to use the
# script accordingly.

            if [ "$1" = "" ]

        then

            PASSWORDGEN

fi




            if [ "$1" = "-h" ]


        then

            GENERROR1

fi