#!/usr/bin/env python# -*- coding: utf-8 -*-# Created by weilai on 2017/04/14from Cryptodome.Cipher import AESfrom Cryptodome.Random import get_random_bytesimport base64# declared outside of all functionskey = get_random_bytes(16)tag = Nonenonce = Nonedef encrypt(data):    global tag, nonce    byte_data = data.encode(encoding="utf-8")    cipher = AES.new(key, AES.MODE_EAX)    nonce = cipher.nonce    cipher_text, tag = cipher.encrypt_and_digest(byte_data)    return cipher_textdef decrypt(data):    global tag, nonce    cipher = AES.new(key, AES.MODE_EAX, nonce)    decrypt_text = cipher.decrypt_and_verify(data, tag)    return decrypt_textr = encrypt('超级大坏蛋')b64r = base64.b64encode(r)print(b64r)b64b = base64.b64decode(b64r)rr = decrypt(b64b)print(rr.decode())