# DC18 bin500 string decryptor
# http://smokedchicken.org

import pyDes
import sys

f = file(sys.argv[1])
data = f.read();
f.close()

DES = pyDes.des("DD73CC7FDD7ECC7F".decode('hex'), pyDes.CBC, "DEADBEEFBAADF00D".decode('hex'), pad=None, padmode=pyDes.PAD_PKCS5)
d = DES.decrypt(data)
print "Decrypted: %s" % d