This message has been encrypted by applying DES two times. Can you recover the key and decrypt it? Message: ff4f3ada7884cfb0a7550083f001f44310da5ec4b0c9ef5fc73ad71d0ad19253265646283883f746547d55d5bee6e21490ac44e6cf2923ac

Provided Script in Python:
import os
from Crypto.Cipher import DES
#from crypto.Cipher import DES
BS = DES.block_size
pad = lambda s: s + (BS - len(s) % BS) * chr(BS - len(s) % BS)
unpad = lambda s: s[0:-ord(s[-1])]

def encrypt(data,key1,key2):
    data = pad(data)
    c1 = DES.new(key1, DES.MODE_ECB)
    c2 = DES.new(key2, DES.MODE_ECB)
    m = c1.encrypt(data)
    r = c2.encrypt(m)
    return r

def decrypt(data,key1,key2):
    c1 = DES.new(key1, DES.MODE_ECB)
    c2 = DES.new(key2, DES.MODE_ECB)
    m = c2.decrypt(data)
    r = c1.decrypt(m)
    return unpad(r)

f = open('secret.txt')
flag = f.readline().strip()
message = 'The flag is: ' + flag
key1 = f.readline().strip().decode('hex') # 64-bit key generated using os.urandom(3) + ('\x00'*5)
key2 = f.readline().strip().decode('hex') # 64-bit key generated using os.urandom(3) + ('\x00'*5)

e = encrypt(message,key1,key2)
print e.encode('hex')