John the Ripper Tool
Myself Rama Krishna Chowdary Marni with University ID: 2000030843 persuading 3rd year CSE-Honors in Koneru Lakshmaiah University as a peer mentor I am publishing article on John the Ripper tool.
John the Ripper was first released in?1996, it is a password cracking tool originally produced for UNIX-based systems. It was designed to test password strength, brute-force encrypted (hashed) passwords, and crack passwords via dictionary attacks.
?key features of the tool include offering multiple modes to speed up password cracking, automatically detecting the hashing algorithm used by the encrypted passwords, and the ease of running and configuring the tool making it a password cracking tool of choice for novices and professionals alike.
How to Install John the Ripper
or a simple command "sudo apt-get install john" as root user to install john the ripper tool.
Implementation of John the Ripper to crack the zip file password
open john from applications in the application menu
zip2john <filename>.<format> (ex: zip2john example.zip)
The above command generates the hash value of the password and displays it in the terminal.
zip2john <filename>.<format> > hash.txt
This command stores the hash value of the password in the hash.txt file.
john --format=<format> hash.txt
This provides all the possible passwords for the encrypted file.