思路：

从CryptoJS源码中抠出python模拟报错的代码

准备工作:

1.安装execjs库

pip install execjs

2.安装nodejs
百度一下一大堆

3.使用npm安装crypto-js库

4.讲crypto-js库放入安装的node_modules文件夹下

需求

已知加密后文本和密钥反推出原始文本

text = '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'
key = 'd719303e82ed09cdb24b717b1375f986'

使用ECB模式无须偏移量

python代码

import execjs
from Crypto.Cipher import AES
from binascii import b2a_hex, a2b_hex
import os
from urllib import parseos.environ["NODE_PATH"] = "D:/New Folder/node_modules"
# print(execjs.get().name)js = open('min3.js', 'r', encoding='utf-8').read()text = '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'
key = 'd719303e82ed09cdb24b717b1375f986'
ctx = execjs.compile(js)
s = ctx.call('getAesEncrypt',text,key)
print(s)
print((parse.unquote(s)))

js代码 = min3.js

var CryptoJS = require("crypto-js");function stringify1(t) {for (var r = t.words, e = t.sigBytes, i = [], n = 0; n < e; n++) {var o = r[n >>> 2] >>> 24 - n % 4 * 8 & 255;i.push(String.fromCharCode(o))}return escape(i.join(""))}
// function stringify(t) {
//                 try {
//                     return decodeURIComponent(escape(stringify1(t)))
//                 } catch (t) {
//                     throw new Error("Malformed UTF-8 data")
//                 }}
function getAesEncrypt(t,key) {//加密var r = CryptoJS.enc.Hex.parse(key);var p = CryptoJS.AES.decrypt(t, r, {mode: CryptoJS.mode.ECB,padding: CryptoJS.pad.Pkcs7});// return decodeURIComponent(escape(stringify1(p)))return stringify1(p)// return p.sigBytes// return CryptoJS.enc.Utf8.stringify(p);
}