John the Ripper

This is the community-enhanced, "jumbo" version of John the Ripper. It has a lot of code, documentation, and data contributed by jumbo developers and the user community. It is easy for new code to be added to jumbo, and the quality requirements are low, although lately we've started subjecting all contributions to quite some automated testing. This means that you get a lot of functionality that is not necessarily "mature", which in turn means that bugs in this code are to be expected. John the Ripper is a fast password cracker, currently available for many flavors of Unix, macOS, Windows, DOS, BeOS, and OpenVMS (the latter requires a contributed patch). Its primary purpose is to detect weak Unix passwords. Besides several crypt(3) password hash types most commonly found on various Unix flavors, supported out of the box are Kerberos/AFS and Windows LM hashes, as well as DES-based tripcodes, plus hundreds of additional hashes and ciphers in "-jumbo" versions. Cracked passwords will be printed to the terminal and saved in the file called $JOHN/john.pot (in the documentation and in the configuration file for John, "$JOHN" refers to John's "home directory"; which directory it really is depends on how you installed John). The $JOHN/john.pot file is also used to not load password hashes that you already cracked when you run John the next time. These are just the most essential things you can do with John. For a complete list of command line options and for more complicated usage examples you should refer to OPTIONS and EXAMPLES, respectively. Please note that "binary" (pre-compiled) distributions of John may include alternate executables instead of just "john". You may need to choose the executable that fits your system best, e.g. "john-omp" to take advantage of multiple CPUs and/or CPU cores. John the Ripper is designed to be both feature-rich and fast. It combines several cracking modes in one program and is fully configurable for your particular needs (you can even define a custom cracking mode using the built-in compiler supporting a subset of C). Also, John is available for several different platforms which enables you to use the same cracker everywhere (you can even continue a cracking session which you started on another platform). Out of the box, John supports (and autodetects) the following Unix crypt(3) hash types: traditional DES-based, "bigcrypt", BSDI extended DES-based, FreeBSD MD5-based (also used on Linux and in Cisco IOS), and OpenBSD Blowfish-based (now also used on some Linux distributions and supported by recent versions of Solaris). Also supported out of the box are Kerberos/AFS and Windows LM (DES-based) hashes, as well as DES-based tripcodes. When running on Linux distributions with glibc 2.7+, John 1.7.6+ additionally supports (and autodetects) SHA-crypt hashes (which are actually used by recent versions of Fedora and Ubuntu), with optional OpenMP parallelization (requires GCC 4.2+, needs to be explicitly enabled at compile-time by uncommenting the proper OMPFLAGS line near the beginning of the Makefile). Similarly, when running on recent versions of Solaris, John 1.7.6+ supports and autodetects SHA-crypt and SunMD5 hashes, also with optional OpenMP parallelization (requires GCC 4.2+ or recent Sun Studio, needs to be explicitly enabled at compile-time by uncommenting the proper OMPFLAGS line near the beginning of the Makefile and at runtime by setting the OMP NUM THREADS environment variable to the desired number of threads). "-jumbo" versions add support for hundreds of additional hash and cipher types, including fast built-in implementations of SHA-crypt and SunMD5, Windows NTLM (MD4-based) password hashes, various macOS and Mac OS X user password hashes, fast hashes such as raw MD5, SHA-1, SHA-256, and SHA-512 (which many "web applications" historically misuse for passwords), various other "web application" password hashes, various SQL and LDAP server password hashes, and lots of other hash types,