python3 aes 报错 ValueError: Incorrect AES key length (95 bytes)的解决方案

解决方案，

1.key的长度一定要是 16 的倍数而且不能超长，

2.如果是自己随机出来的key 不是16的倍数，加密时不影响，但是在解密时，用 b'\x00' 补齐16的倍数

具体分析如下：

错误信息：

Traceback (most recent call last):
File “C:\Users\billl\AppData\Local\Continuum\anaconda3\lib\site-packages\IPython\core\interactiveshell.py”, line 2963, in run_code
exec(code_obj, self.user_global_ns, self.user_ns)
File “”, line 1, in
AES.new(“asssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssdfasasasasa”, AES.MODE_ECB)
File “C:\Users\billl\AppData\Local\Continuum\anaconda3\lib\site-packages\Crypto\Cipher\AES.py”, line 232, in new
return create_cipher(sys.modules[name], key, mode, *args, **kwargs)
File "C:\Users\billl\AppData\Local\Continuum\anaconda3\lib\site-packages\Crypto\Cipher_init.py", line 79, in _create_cipher
return modes[mode](factory, **kwargs)
File “C:\Users\billl\AppData\Local\Continuum\anaconda3\lib\site-packages\Crypto\Cipher_mode_ecb.py”, line 215, in _create_ecb_cipher
cipher_state = factory._create_base_cipher(kwargs)
File “C:\Users\billl\AppData\Local\Continuum\anaconda3\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 (95 bytes)

这个报错是说AES的KEY长度超过了限制

除了MODE_SIV模式key长度为：32, 48, or 64,
其余key长度为16, 24 or 32
内部函数说明：

“”"Create a new AES cipher.

:param key:The secret key to use in the symmetric cipher.It must be 16, 24 or 32 bytes long (respectively for *AES-128*,*AES-192* or *AES-256*).For ``MODE_SIV`` only, it doubles to 32, 48, or 64 bytes.
:type key: bytes/bytearray/memoryview:param mode:The chaining mode to use for encryption or decryption.If in doubt, use ``MODE_EAX``.
:type mode: One of the supported ``MODE_*`` constants

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