View source for Generare l'hash di una password

==Tipi di Hash==


Gli hash possono essere crypot (non usato ), MD5 o SHA1

Esempio
 mkpasswd -m SHA-512 test

Si ottiene
 $6$EUEoZKNThDNKmfdb$3g5AuZFmWHCaDJDJq2GVPdLQ8CAOPdDUGFYTf.T7SMbgk9aK2fyoo5EQlAZhfW.SEs11S4GYLNxX/RR5yxFUy.

Che è spezzabile in

Algoritmo (1=MD5, 6=SHA1)
 $6
Salt
 $EUEoZKNThDNKmfdb
Hash
 $3g5AuZFmWHCaDJDJq2GVPdLQ8CAOPdDUGFYTf.T7SMbgk9aK2fyoo5EQlAZhfW.SEs11S4GYLNxX/RR5yxFUy.

Se si vuole che l'hash sia sempre lo stesso, occorre usare lo stesso salt nella generazione.

<pre>
cdenley@cdenley:~$ mkpasswd -m SHA-512 test
$6$SWunIV3lT3K52WKw$SpsARBUReIAbJ0pd0r.aFi9yj9AtIww9NFSNkFKTQgDGGY0GRQPagwm9bdKn1dndJw3XSy5AB6zWQK/D82a5p.
cdenley@cdenley:~$ mkpasswd -m SHA-512 test nonrandom
$6$nonrandom$y6NEeles.nw6ECcrMVQCj5JjX1ahluaLkbNsl/XD1l4ViGm1prkjkATSeZCaLlS7wWulmgIq.OR4sh.QrTOqe/
cdenley@cdenley:~$ mkpasswd -m SHA-512 test nonrandom
$6$nonrandom$y6NEeles.nw6ECcrMVQCj5JjX1ahluaLkbNsl/XD1l4ViGm1prkjkATSeZCaLlS7wWulmgIq.OR4sh.QrTOqe/
</pre>


==Con openssl==

* Hash crypt
 
 openssl passwd -crypt

 echo "lapassword" | openssl passwd -crypt -stdin

* Hash MD5
 openssl passwd -1

 echo "lapassword" | openssl passwd -1 -stdin

* Vedi  man 1ssl passwd

==Con mkpasswd==

 sudo aptitude install mkpasswd

* Hash crypt
 mkpasswd -m des

 echo "lapassword" | mkpasswd -m des -s

* Altri hash:
 des	standard 56 bit DES-based crypt(3)
 md5	MD5
 sha-256	SHA-256
 sha-512	SHA-512

* Vedi mkpasswd --help

==Riferimenti==
*[http://linux.derkeiler.com/Mailing-Lists/RedHat/2007-09/msg00111.html How to create encrypted password via command line]
*[http://art.ubuntuforums.org/showpost.php?p=9075000&postcount=6 Ubuntu Forums - View Single Post - [ubuntu] Ubuntu's Password Encryption]