python - AES 密钥，解密器 = AES.new(HEADER_KEY, AES.MODE_CBC, 16 * '\x00')

Question

尝试从 2017 年开始运行此代码 - https://gist.github.com/dfirfpi/2602b726af1b944efa723d34b624ad88

Traceback (most recent call last):
  File "C:\unssz.py", line 58, in <module>
    main()
  File "C:\unssz.py", line 34, in main
    decryptor = AES.new(HEADER_KEY, AES.MODE_CBC, 16 * '\x00')
  File "C:\Users\artur\AppData\Local\Programs\Python\Python39\lib\site-packages\Crypto\Cipher\AES.py", line 232, in new
    return _create_cipher(sys.modules[__name__], key, mode, *args, **kwargs)
  File "C:\Users\artur\AppData\Local\Programs\Python\Python39\lib\site-packages\Crypto\Cipher\__init__.py", line 79, in _create_cipher
    return modes[mode](factory, **kwargs)
  File "C:\Users\artur\AppData\Local\Programs\Python\Python39\lib\site-packages\Crypto\Cipher\_mode_cbc.py", line 274, in _create_cbc_cipher
    cipher_state = factory._create_base_cipher(kwargs)
  File "C:\Users\artur\AppData\Local\Programs\Python\Python39\lib\site-packages\Crypto\Cipher\AES.py", line 103, in _create_base_cipher
    result = start_operation(c_uint8_ptr(key),
  File "C:\Users\artur\AppData\Local\Programs\Python\Python39\lib\site-packages\Crypto\Util\_raw_api.py", line 243, in c_uint8_ptr
    raise TypeError("Object type %s cannot be passed to C code" % type(data))
TypeError: Object type <class 'str'> cannot be passed to C code

然后更改第 34 行

decryptor = AES.new(HEADER_KEY, AES.MODE_CBC, 16 * '\x00')

至

decryptor = AES.new(HEADER_KEY.decode("utf8"), AES.MODE_CBC, 16 * '\x00')

收到此错误消息

  File "C:\unssz.py", line 58, in <module>
    main()
  File "C:\unssz.py", line 34, in main
    decryptor = AES.new(HEADER_KEY.encode("utf8"), AES.MODE_CBC, 16 * '\x00')
  File "C:\Users\artur\AppData\Local\Programs\Python\Python39\lib\site-packages\Crypto\Cipher\AES.py", line 232, in new
    return _create_cipher(sys.modules[__name__], key, mode, *args, **kwargs)
  File "C:\Users\artur\AppData\Local\Programs\Python\Python39\lib\site-packages\Crypto\Cipher\__init__.py", line 79, in _create_cipher
    return modes[mode](factory, **kwargs)
  File "C:\Users\artur\AppData\Local\Programs\Python\Python39\lib\site-packages\Crypto\Cipher\_mode_cbc.py", line 274, in _create_cbc_cipher
    cipher_state = factory._create_base_cipher(kwargs)
  File "C:\Users\artur\AppData\Local\Programs\Python\Python39\lib\site-packages\Crypto\Cipher\AES.py", line 93, in _create_base_cipher
    raise ValueError("Incorrect AES key length (%d bytes)" % len(key))
ValueError: Incorrect AES key length (19 bytes)

这里有什么问题，如何使它工作？我正在尝试解密三星安全区加密容器 .msr 文件（忘记密码）

from __future__ import print_function

from Crypto.Cipher import AES
import sys

CHUNK_SIZE = 4096
HEADER_SIZE = 16384
# AES key, for different crypto algorithms, different keys.
HEADER_KEY = '\x06\x42\x21\x98\x03\x69\x5E\xB1\x5F\x40\x60\x8C\x2E\x36\x00\x06'


def main():
    with open(sys.argv[1], 'rb') as input_file:
        header_enc = input_file.read(HEADER_SIZE)
        decryptor = AES.new(HEADER_KEY, AES.MODE_CBC, 16 * '\x00')
        header_dec = decryptor.decrypt(header_enc)

        body_decryption_key = header_dec[0x203c:0x204C]
        print('Decoding key: {}'.format(body_decryption_key.encode('hex')))

        if len(sys.argv) != 3:
            print('No output file specified, giving up...')
            sys.exit(0)

        decryptor = AES.new(body_decryption_key, AES.MODE_ECB, 16 * '\00')

        with open(sys.argv[2], 'wb') as output_file:
            while True:
                chunk_enc = input_file.read(CHUNK_SIZE)
                if len(chunk_enc) == 0:
                    break
                chunk_dec = decryptor.decrypt(chunk_enc)
                output_file.write(chunk_dec)
                sys.stdout.write('.')
                sys.stdout.flush()


if __name__ == "__main__":
    main()

标签： pythonpython-3.xencryptioncryptographyaes