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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 is free and Open Source software, distributed primarily in source code form. 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.

John the Ripper Pro is currently available for Linux on x86 and x86-64 (x64) systems, with support for the latest Intel and AMD processor features such as SSE2, and for Mac OS X on both Intel and PowerPC Macs, making use of SSE2 and AltiVec acceleration, respectively.

Proceed to John the Ripper Pro homepage for your OS:

• John the Ripper Pro for Linux
• John the Ripper Pro for Mac OS X
• On Windows, consider Hash Suite (developed by a contributor to John the Ripper)

Support for certain other operating systems and processor architectures is planned. If your OS is not supported yet, please use the Quick Comment field at the bottom of this web page to request support for your OS; be sure to explicitly indicate your interest in purchasing a copy and license, and provide your e-mail address and desired price. Please note that support for a new OS in Pro versions of John the Ripper may only be added in response to commercial demand. Meanwhile, feel free to explore the cross-platform and free version of John the Ripper.

John the Ripper Pro currently supports the following password hash types (and more are planned):

• Traditional DES-based Unix crypt(3) - most commercial Unix systems (Solaris, AIX, ...), Mac OS X 10.2, ancient Linux and *BSD
• "bigcrypt" - HP-UX, Tru64 / Digital Unix / OSF/1
• BSDI-style extended DES-based crypt(3) - BSD/OS, *BSD (non-default)
• FreeBSD-style MD5-based crypt(3) - older Linux, FreeBSD, NetBSD, Cisco IOS, OpenBSD (non-default)
• OpenBSD-style Blowfish-based crypt(3) - OpenBSD, some Linux, other *BSD and Solaris 10+ (non-default)
• SHA-crypt (sha512crypt and sha256crypt) - newer Linux
  These are supported when running on a Linux system with glibc 2.7+ (any recent system)
• Kerberos AFS DES-based hashes
• LM (LanMan) DES-based hashes - Windows NT/2000/XP/2003, Mac OS X 10.3
• NTLM MD4-based hashes - Windows (all versions)
• Mac OS X 10.4 - 10.6 salted SHA-1 hashes
• Mac OS X 10.7 salted SHA-512 hashes (new in 1.8.0 Pro, currently available for Linux only)

You can browse the generic documentation for John the Ripper online. Also relevant is our presentation on the history of password security.

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