def xor_decrypt(data, key):
    key_len = len(key)
    result = bytearray(len(data))

    for i in range(1,len(data)):
        key_index = (i - 1) & 7
        result[i] = data[i] ^ key[key_index]

    return result


def process_file(src_file, dst_file):
    with open(src_file, "rb") as f:
        data = f.read()

    dec = xor_decrypt(data, key)

    os.makedirs(os.path.dirname(dst_file), exist_ok=True)

    with open(dst_file, "wb") as f:
        f.write(dec)

    print(f"[OK] {src_file}")