john Package Description

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).

John the Ripper Pro adds support for Windows NTLM (MD4-based) and Mac OS X 10.4+ salted SHA-1 hashes.

“Community enhanced” -jumbo versions add support for many more password hash types, including Windows NTLM (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.

Unlike older crackers, John normally does not use a crypt(3)-style routine. Instead, it has its own highly optimized modules for different hash types and processor architectures. Some of the algorithms used, such as bitslice DES, couldn’t have been implemented within the crypt(3) API; they require a more powerful interface such as the one used in John. Additionally, there are assembly language routines for several processor architectures, most importantly for x86-64 and x86 with SSE2.

Source: http://www.openwall.com/john/doc/
John the Ripper Homepage | Kali John the Ripper Repo

• Author: Solar Designer
• License: GPLv2

Tools included in the john package

mailer – Emails users who have had their passwords cracked

[email protected]:~# mailer
Usage: /usr/sbin/mailer PASSWORD-FILE

john – John the Ripper password cracker

[email protected]:~# john
John the Ripper password cracker, ver: 1.7.9-jumbo-7_omp [linux-x86-sse2]
Copyright (c) 1996-2012 by Solar Designer and others
Homepage: http://www.openwall.com/john/

Usage: john [OPTIONS] [PASSWORD-FILES]
--config=FILE             use FILE instead of john.conf or john.ini
--single[=SECTION]        "single crack" mode
--wordlist[=FILE] --stdin wordlist mode, read words from FILE or stdin
                  --pipe  like --stdin, but bulk reads, and allows rules
--loopback[=FILE]         like --wordlist, but fetch words from a .pot file
--dupe-suppression        suppress all dupes in wordlist (and force preload)
--encoding=NAME           input data is non-ascii (eg. UTF-8, ISO-8859-1).
                          For a full list of NAME use --list=encodings
--rules[=SECTION]         enable word mangling rules for wordlist modes
--incremental[=MODE]      "incremental" mode [using section MODE]
--markov[=OPTIONS]        "Markov" mode (see doc/MARKOV)
--external=MODE           external mode or word filter
--stdout[=LENGTH]         just output candidate passwords [cut at LENGTH]
--restore[=NAME]          restore an interrupted session [called NAME]
--session=NAME            give a new session the NAME
--status[=NAME]           print status of a session [called NAME]
--make-charset=FILE       make a charset file. It will be overwritten
--show[=LEFT]             show cracked passwords [if =LEFT, then uncracked]
--test[=TIME]             run tests and benchmarks for TIME seconds each
--users=[-]LOGIN|UID[,..] [do not] load this (these) user(s) only
--groups=[-]GID[,..]      load users [not] of this (these) group(s) only
--shells=[-]SHELL[,..]    load users with[out] this (these) shell(s) only
--salts=[-]COUNT[:MAX]    load salts with[out] COUNT [to MAX] hashes
--pot=NAME                pot file to use
--format=NAME             force hash type NAME: afs bf bfegg bsdi crc32 crypt
                          des django dmd5 dominosec dragonfly3-32 dragonfly3-64
                          dragonfly4-32 dragonfly4-64 drupal7 dummy dynamic_n
                          epi episerver gost hdaa hmac-md5 hmac-sha1
                          hmac-sha224 hmac-sha256 hmac-sha384 hmac-sha512
                          hmailserver ipb2 keepass keychain krb4 krb5 lm lotus5
                          md4-gen md5 md5ns mediawiki mscash mscash2 mschapv2
                          mskrb5 mssql mssql05 mysql mysql-sha1 nethalflm netlm
                          netlmv2 netntlm netntlmv2 nsldap nt nt2 odf office
                          oracle oracle11 osc pdf phpass phps pix-md5 pkzip po
                          pwsafe racf rar raw-md4 raw-md5 raw-md5u raw-sha
                          raw-sha1 raw-sha1-linkedin raw-sha1-ng raw-sha224
                          raw-sha256 raw-sha384 raw-sha512 salted-sha1 sapb
                          sapg sha1-gen sha256crypt sha512crypt sip ssh
                          sybasease trip vnc wbb3 wpapsk xsha xsha512 zip
--list=WHAT               list capabilities, see --list=help or doc/OPTIONS
--save-memory=LEVEL       enable memory saving, at LEVEL 1..3
--mem-file-size=SIZE      size threshold for wordlist preload (default 5 MB)
--nolog                   disables creation and writing to john.log file
--crack-status            emit a status line whenever a password is cracked
--max-run-time=N          gracefully exit after this many seconds
--regen-lost-salts=N      regenerate lost salts (see doc/OPTIONS)
--plugin=NAME[,..]        load this (these) dynamic plugin(s)

unafs – Script to warn users about their weak passwords

[email protected]:~# unafs
Usage: unafs DATABASE-FILE CELL-NAME

unshadow – Combines passwd and shadow files

[email protected]:~# unshadow
Usage: unshadow PASSWORD-FILE SHADOW-FILE

unique – Removes duplicates from a wordlist

[email protected]:~# unique
Usage: unique [-v] [-inp=fname] [-cut=len] [-mem=num] OUTPUT-FILE [-ex_file=FNAME2] [-ex_file_only=FNAME2]

       reads from stdin 'normally', but can be overridden by optional -inp=
       If -ex_file=XX is used, then data from file XX is also used to
       unique the data, but nothing is ever written to XX. Thus, any data in
       XX, will NOT output into OUTPUT-FILE (for making iterative dictionaries)
       -ex_file_only=XX assumes the file is 'unique', and only checks against XX
       -cut=len  Will trim each input lines to 'len' bytes long, prior to running
       the unique algorithm. The 'trimming' is done on any -ex_file[_only] file
       -mem=num.  A number that overrides the UNIQUE_HASH_LOG value from within
       params.h.  The default is 21.  This can be raised, up to 25 (memory usage
       doubles each number).  If you go TOO large, unique will swap and thrash and
       work VERY slow

       -v is for 'verbose' mode, outputs line counts during the run

unshadow Usage Example

Combine the provided passwd (passwd) and shadow (shadow)(shadow) and redirect them to a file (> unshadowed.txt):

[email protected]:~# unshadow passwd shadow > unshadowed.txt

john Usage Example

Using a wordlist (–wordlist=/usr/share/john/password.lst), apply mangling rules (–rules) and attempt to crack the password hashes in the given file (unshadowed.txt):

[email protected]:~# john --wordlist=/usr/share/john/password.lst --rules unshadowed.txt
Warning: detected hash type "sha512crypt", but the string is also recognized as "crypt"
Use the "--format=crypt" option to force loading these as that type instead
Loaded 1 password hash (sha512crypt [64/64])
toor             (root)
guesses: 1  time: 0:00:00:07 DONE (Mon May 19 08:13:05 2014)  c/s: 482  trying: 1701d - andrew
Use the "--show" option to display all of the cracked passwords reliably

unique Usage Example

Using verbose mode (-v), read a list of passwords (-inp=allwords.txt) and save only unique words to a file (uniques.txt):

[email protected]:~# unique -v -inp=allwords.txt uniques.txt
Total lines read 6089 Unique lines written 5083