John the Ripper Pro password cracker John the Ripper is a fast password cracker, available for many operating systems. Its primary purpose is to detect weak Unix passwords, although Windows LM hashes and a number of other password hash types are supported as well. John the Ripper Pro builds upon the free John the Ripper to deliver a commercial product better tailored for specific operating systems. It is distributed primarily in the form of 'native' packages for the target operating systems and in general is meant to be easier to install and use while delivering optimal performance. How to Download John the Ripper. JtR is an open-source project, so you can either download and compile the source on your own, download the executable binaries, or find it as part of a penetration testing package. The official website for John the Ripper is on Openwall.
John the Ripper (JTR) is a widely known and verified fast password cracker, available for Windows, DOS, BeOS, and OpenVMS and many flavours of Linux. It uses wordlists/dictionary to crack many different types of hashes including MD5
, SHA
, etc.
This password cracking tool is free and Open Source, initially developed for the Unix operating system. But today it runs on fifteen different platforms. Its primary purpose is to detect weak Unix passwords. Besides several crypt(3)
password hash types most commonly found on various Unix systems, supported out of the box are Windows LM hashes, and a lot of other hashes and ciphers in the community-enhanced version.
For those who rather use commercial version, John the Ripper is available for following platforms:
John the Ripper offers two types of attacks:
traditional DES-based,
'bigcrypt',
BSDI extended DES-based,
FreeBSD MD5-based,
OpenBSD Blowfish-based,
Kerberos/AFS and Windows LM (DES-based),
DES-based tripcodes.
glibc 2.7+
, John 1.7.6+ supports SHA-crypt
hashes, with optional OpenMP parallelization (requires GCC 4.2+).SHA-crypt
and SunMD5
hashes, also with optional OpenMP parallelization (requires GCC 4.2+ or recent Sun Studio).MD4-based
), Mac OS X 10.4-10.6 salted SHA-1
hashes, Mac OS X 10.7 salted SHA-512
hashes, raw MD5
and SHA-1
, arbitrary MD5-based
“web application” password hash types, hashes used by SQL database servers (MySQL, MS SQL, Oracle) and by some LDAP servers, several hash types used on OpenVMS, password hashes of the Eggdrop IRC bot, and lots of other hash types, as well as many non-hashes such as OpenSSH private keys, S/Key skeykeys files, Kerberos TGTs, PDF files, ZIP (classic PKZIP and WinZip/AES) and RAR archives.Clone it from the Github repository:
Then build:
To test your build, run:
Windows users can find detailed documentation on the official John the Ripper Wiki page.
To run John, firstly supply it with some password files and if you wish, specify a cracking mode:
If you want to restrict it to the wordlist mode only (permitting the use of word mangling rules):
To retrieve the cracked passwords, run:
Interrupted session can be continued with the following: