onionduke.py 文件源码

def xor_file(input_file, output_file, xorkey):
    number_added = 0
    while True:

        some_bytes = input_file.read(4)
        if len(some_bytes) == 0:
            break
        if len(some_bytes) % 4 != 0:
            number_added = 4 - len(some_bytes)
            some_bytes = some_bytes + "\x00" * (number_added)

        writable_bytes = struct.pack("<I", (struct.unpack("<I", some_bytes)[0]) ^ xorkey)
        output_file.write(writable_bytes)

    if number_added != 0:
        number_added = 0 - number_added
        output_file.seek(number_added, os.SEEK_END)
        output_file.truncate()