Minecraft lastlogin decrypt

lastcrack.py

import Crypto.Random
from Crypto.Cipher import DES
import hashlib
import struct

password = "passwordfile";
salt = "\x0c\x9d\x4a\xe4\x1e\x83\x15\xfc";
iteration_count = 5;

def decrypt(ciphertext):
	key = password + salt
	for i in range(iteration_count):
		key = hashlib.md5(key).digest()
	cipher = DES.new(key[:8], DES.MODE_CBC, IV=key[8:])
	output = cipher.decrypt(ciphertext)
	return output;

def parseOutput(out):
	username_len = struct.unpack(">h", out[0:2])[0];
	username = out[2:username_len+2];
	password_len = struct.unpack(">h", out[username_len+2:username_len+4])[0];
	password = out[username_len+4:username_len+password_len+4];
	return (username, password);

file = open("lastlogin", "rb");
out = parseOutput(decrypt(file.read()));
file.close();
print "Username : ", out[0];
print "Password : ", out[1];