URL: http://www.openwall.com/lists/john-users/2012/01/10/2

root@kali ~$ apt-get source john
Reading package lists... Done
Building dependency tree
Reading state information... Done
Need to get 1,923 kB of source archives.
Get:1 http://http.kali.org/kali/ kali/main john 1.7.9-jumbo-7-1kali1 (dsc) [1,462 B]
Get:2 http://http.kali.org/kali/ kali/main john 1.7.9-jumbo-7-1kali1 (tar) [1,893 kB]
Get:3 http://http.kali.org/kali/ kali/main john 1.7.9-jumbo-7-1kali1 (diff) [28.4 kB]
Fetched 1,923 kB in 1s (1,093 kB/s)
gpgv: keyblock resource `/root/.gnupg/trustedkeys.gpg': file open error
gpgv: Signature made Wed 23 Oct 2013 18:30:24 BST using RSA key ID B82B61DB
gpgv: Can't check signature: public key not found
dpkg-source: warning: failed to verify signature on ./john_1.7.9-jumbo-7-1kali1.dsc
dpkg-source: info: extracting john in john-1.7.9-jumbo-7
dpkg-source: info: unpacking john_1.7.9-jumbo-7.orig.tar.gz
dpkg-source: info: unpacking john_1.7.9-jumbo-7-1kali1.debian.tar.gz
dpkg-source: info: applying add-multicore-support
dpkg-source: info: applying allow-cflags-overriding.diff
dpkg-source: info: applying kfreebsd-c3_fmt.diff
dpkg-source: info: applying define-cfg-name.diff
root@kali ~$ cd john-1.7.9-jumbo-7
root@kali ~/john-1.7.9-jumbo-7$ ls -lahR | grep rar2john
-rw-r--r-- 1 root root 13K Sep 17 2012 rar2john.c
root@kali ~/john-1.7.9-jumbo-7$

root@kali ~$ john | head
John the Ripper password cracker, ver: 1.7.9-jumbo-7_omp [linux-x86-64]
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
root@kali ~$