john the ripper, on kali linux it outputs no password hashes loaded

Question

Trying to crack the password using John , I have unshadowed the passwd & shadow file, but it outputs no password hashes loaded, how should unhash

john johninput --wordlist=/usr/share/wordlist/rockyou.txt

output : no password hashes loaded (see FAQ)

Please clarify your specific problem or provide additional details to highlight exactly what you need. As it's currently written, it's hard to tell exactly what you're asking. — Community, Commented Oct 28, 2021 at 15:39

Toto · Accepted Answer · 2021-11-07 17:00:45Z

I'm going to guess that you're testing this on Kali itself; having ran the following command successfully:

sudo unshadow /etc/passwd /etc/shadow > johninput

If you view johninput and see $y$ right after the username, then that indicates the passwords are hashed with yescrypt.

kali:$y$j9T$B4i9oW2LaERt/J5/X8bbN/$zzGfRqAZim/VofZcas3MhnfSdYddB5.zRulk087PN2A:1000:1000:Kali,,,:/home/kali:/usr/bin/zsh

It appears John needs a little help with detecting the hash format, so try changing your command line to the following:

john --format=crypt --wordlist=/usr/share/wordlists/rockyou.txt johninput

Of course the default password for the kali user is solved much faster by simply running:

john --format=crypt johninput

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