#!/bin/sh

#Demo 1 slide 3

#Adds user with name Brandon Aperocho
useradd user01

passwd user01
password

#Adds user with name Arjun Sharma
useradd user02

passwd user02
123456

unshadow /etc/passwd /etc/shadow > passfile

john passfile
john -show passfile

#Note that this usage of john start off by using a single then wordlist then incremental

userdel user01
userdel user02

#==============================================

#Demo 2 -single demo single ruleset starts at around line 420

#Adds user with name Brandon Aperocho
useradd -c "Brandon Aperocho" user01

passwd user01
abrandon09090

# Add login info 
#chfn user01
#[enter]
#Room number: 09090
#Work number: 3211234231
#Home number: 5677655678
#Other: nicetry


#Adds user with name Arjun Sharma
useradd -c "Arjun Sharma" user02

#chfn user02
#[enter]
#Room number: 123
#Work number: 3211234231
#Home number: 5677655678
#Other: pass

passwd user02
user02sharma123

unshadow /etc/passwd /etc/shadow > passfile

john -single passfile
john -show passfile

userdel user01
userdel user02

#==============================================

#Demo 3 -wordlist demo 

#add users

unshadow /etc/passwd /etc/shadow > passfile

john -wordlist=/usr/share/john/password.lst passfile

#add users
# Create wordlist with passwords, 1 password per line 

john -wordlist=./mywordlist.txt passfile

#Change a password by capitalizing first letter and adding 1
#Change a password that contains "i" or "I" replace with 1
#Then show ruleset

#vi customrules
#[List.Rules:Easy]
#cAz"[0-9]" 
#/i si1
#/I sI1
#l r #palindrome 

user password
Password1

#cat customrules >> /etc/john/john.conf

john -wordlist=./mywordlist.txt rules=Easy passfile
john -show passfile


#==============================================

#Demo 4 -incremental demo; brute force using some of the modes
#These passwords are set just so it does not take that much time to crack since it is brute forcing the passwords.
#Observe progress by pressing any button other than 'q' or 'CRTL-C'

useradd user11

passwd user11
mayli

useradd user22

passwd user22
comely

unshadow /etc/passwd /etc/shadow > passfile

john -incremental=lower passfile
john -show passfile

userdel user11
userdel user12

#Suppose we have some passwords files already that have been cracked by john
#We can create our own custom ruleset for the incremental mode to follow
#This is useful for cracking passwords with similar password restrictions 
#E.g when users are restricted in password length and types of characters they can use

john -make-charset=custom.chr passfile

vi customrules.txt

[Incremental:Easy]
File=custom.chr
MinLen=6
MaxLen=10
#CharCount=95
#CharCount makes John prioritize long simple passwords over short complicated one; typically want to use all characters available
#Extra=!@#$ 
#Adds extra characters to check with

cat customrules.txt >> /etc/john/john.conf

john -incremental=Easy passfile1 

#==============================================

# With the existing wordlist and ruleset made, we can create a password dump of all passords from wordlist.txt with the ruleset.
    
john -wordlist=./mywordlist.txt -rules=Wordlist -stdout > passfile1