#!/usr/bin/env python3

from Crypto.Cipher import DES
import os,sys
from base64 import b64decode

data = b64decode('noFdixIZv6Ga9rMqeTWCJTRAI3LkFFO8n9uzYZhN2KbO4II4QxH5rnTe4ltCO/ca')

size = 0x10000
bsize = size / ntasks
ntasks = 20
for i in range(1, 22):
    task = int(sys.argv[1])
    off = (task - 1) * bsize

    key1 = bytearray(b'\0' * 8)
    key2 = bytearray(b'\0' * 8)
    for i in range(off, off+bsize):
        key1[6] = i // 0x100
        key1[7] = i %  0x100
        print('[%04x]'% (i))
        d1 = DES.new(bytes(key1), DES.MODE_ECB)
            for j in range(0, 0x10000):
            key2[6] = j // 0x100
            key2[7] = j %  0x100
            d2 = DES.new(bytes(key2), DES.MODE_ECB)
            test_cicpher = d1.decrypt(data)
            if not test_cicpher or len(test_cicpher) % 8:
                continue
            test_cicpher = d2.decrypt(test_cicpher)
            if test_cicpher[:3] == b'HSE':
                raise Exception(test_cicpher)