ver_up_decrypt_bdp_aes.py

#!/usr/bin/env python3
# SPDX-License-Identifier: MIT

import sys
from Crypto.Cipher import AES
import os

# Referenced by ver_up_decrypt

xkey = b"" # Key here
xiv = b"" # IV here

for i in range(10):
	xiv = AES.new(key=xkey, mode=AES.MODE_ECB).decrypt(xiv)

cipher = AES.new(key=xkey, mode=AES.MODE_OFB, iv=xiv)

with open(sys.argv[1], "rb") as f, open(sys.argv[2], "wb") as wf:
	wf.write(cipher.encrypt(f.read()))