John the Ripper provides high-speed password cracking capabilities to security professionals. It is written in C and can be used as a command-line, GUI, or as a library for writing custom scripts. John the Ripper is a free, open-source, multi-platform password cracking software that runs on Windows, macOS, Linux, and other Unix-like operating systems. The software can be used to identify weak, default, or easily guessed passwords that are vulnerable to attack. It is a favorite among security professionals and is widely used to test the security of user passwords and passwords stored in files.

This means that you get a lot of functionality that is not 'mature' enough or is otherwise inappropriate for the official JtR, which in turn also means that bugs in this code are to be expected, etc.John the Ripper is a fast and powerful password cracking software that is used to help security professionals identify and discover weak passwords. It is very easy for new code to be added to the jumbo patch: the quality requirements are low. This is not 'official' John the Ripper code. With jumbo patch, which has been applied to this source tree of John the Ripper, adds a lot of code, documentation, and data contributed by the user community. Mac OS X 10.4+ salted SHA-1 hashes (new in 1.7.3 Pro).NTLM MD4-based hashes – Windows NT/2000/XP/2003/Vista (new in 1.7.3 Pro).LM (LanMan) DES-based hashes – Windows NT/2000/XP/2003, Mac OS X 10.3.OpenBSD-style Blowfish-based crypt – OpenBSD, some Linux, other *BSD and Solaris 10 (non-default).FreeBSD-style MD5-based crypt – most Linux, FreeBSD, NetBSD, Cisco IOS, OpenBSD (non-default).BSDI-style extended DES-based crypt – BSD/OS, *BSD (non-default).'bigcrypt' – HP-UX, Tru64 / Digital Unix / OSF/1.Traditional DES-based Unix crypt – most commercial Unix systems (Solaris, AIX, …), Mac OS X 10.2, ancient Linux and *BSD.John the Ripper Pro currently supports the following password hash types (and more are planned): It can be run against various encrypted password formats including several crypt password hash types most commonly found on various UNIX flavors. It is one of the most popular password testing/breaking programs as it combines a number of password crackers into one package, autodetects password hash types, and includes a customizable cracker. Initially developed for the UNIX operating system, it currently runs on fifteen different platforms (11 architecture-specific flavors of Unix, DOS, Win32, BeOS, and OpenVMS). New version of John The Ripper has been released, John the Ripper is a free password cracking software tool.

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