https://developers.weixin.qq.com/miniprogram/dev/framework/open-ability/signature.html

使用Python语言，解密用户信息时异常。时啥原因？网上很多同学都遇到了。

Traceback (most recent call last):

  File "demo.py", line 20, in <module>

    main()

  File "demo.py", line 17, in main

    print pc.decrypt(encryptedData, iv)

  File "/tmp/Python/WXBizDataCrypt.py", line 24, in decrypt

    print (cipher.decrypt(encryptedData))

  File "/usr/lib64/python2.7/site-packages/Crypto/Cipher/_mode_cbc.py", line 246, in decrypt

    raise ValueError("Data must be padded to %d byte boundary in CBC mode" % self.block_size)

ValueError: Data must be padded to 16 byte boundary in CBC mode