java 判断AES解密出来的数据是否是乱码

3、response响应数据data解密----->AES解密

一、目标网址：https://fanyi.youdao.com/index.html#/

二、接口分析

1、sign值生成逻辑

// c.a为crypto加密模块，直接导包替换就好
function j(e) {
    return c.a.createHash("md5").update(e.toString()).digest("hex")
}
function k(e, t) {
    return j(`client=${u}&mysticTime=${e}&product=${d}&key=${t}`)
}
const o = (new Date).getTime();
let e = 'fsdsogkndfokasodnaso'
// sign值生成
// e为固定值
// o为时间戳
sign = k(o, e)

2、整合封装代码

const Crypto = require("crypto");

const u = "fanyideskweb", 
        d = "webfanyi", 
        m = "client,mysticTime,product", 
        p = "1.0.0", 
        g = "web", 
        b = "fanyi.web", 
        A = 1, 
        h = 1, 
        f = 1, 
        v = "wifi", 
        O = 0;
function j(e) {
    return Crypto.createHash("md5").update(e.toString()).digest("hex")
}
function k(e, t) {
    return j(`client=${u}&mysticTime=${e}&product=${d}&key=${t}`)
}

function set\_post\_data(txt) {
    const o = (new Date).getTime();
    let e = 'fsdsogkndfokasodnaso'
    return {
        i: txt,
        from: 'auto',
        to: '',
        dictResult: 'true',
        keyid: 'webfanyi',
        sign: k(o, e),
        client: u,
        product: d,
        appVersion: p,
        vendor: g,
        pointParam: m,
        mysticTime: o,
        keyfrom: b,
        mid: A,
        screen: h,
        model: f,
        network: v,
        abtest: O,
        yduuid: "abcdefg"
    }
}

3、使用python调用验证请求

import requests
import execjs


cookies = {....}
headers = {
        'Accept': 'application/json, text/plain, \*/\*',
        'Accept-Language': 'zh-CN,zh;q=0.9',
        'Cache-Control': 'no-cache',
        'Connection': 'keep-alive',
        'Content-Type': 'application/x-www-form-urlencoded',
        'Origin': 'https://fanyi.youdao.com',
        'Pragma': 'no-cache',
        'Referer': 'https://fanyi.youdao.com/',
        'Sec-Fetch-Dest': 'empty',
        'Sec-Fetch-Mode': 'cors',
        'Sec-Fetch-Site': 'same-site',
        'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.0.0 Safari/537.36',
        'sec-ch-ua': '"Chromium";v="122", "Not(A:Brand";v="24", "Google Chrome";v="122"',
        'sec-ch-ua-mobile': '?0',
        'sec-ch-ua-platform': '"Windows"',
}
with open('./set\_post\_data.js', 'r', encoding='utf-8') as f:
    set_post_data_code = f.read()
data = execjs.compile(set_post_data_code).call('set\_post\_data', txt)
response = requests.post('https:///webtranslate', headers=headers, cookies=cookies, data=data)
print(response.text)

三、数据解密

1、解密js分析

//解密分析
// c.a为crypto加密模块，直接导包替换就好
function y(e) {
    return c.a.createHash("md5").update(e).digest()
}
R = (t,o,n)=>{
    if (!t)
        return null;
    const a = e.alloc(16, y(o))
    , i = e.alloc(16, y(n))
    , r = c.a.createDecipheriv("aes-128-cbc", a, i);
    let s = r.update(t, "base64", "utf-8");
    return s += r.final("utf-8"),
        s
}
// t为加密数据data
// o为key值
// n为iv值
// 固定值可写死
let o = "ydsecret://query/key/B\*RGygVywfNBwpmBaZg\*WT7SIOUP2T0C9WHMZN39j^DAdaZhAnxvGcCY6VYFwnHl";
// 固定值可写死
let n = "ydsecret://query/iv/C@lZe2YzHtZ2CYgaXKSVfsb7Y4QWHjITPPZ0nQp87fBeJ!Iv6v^6fvi2WN@bYpJ4";

2、整合封装代码

const Crypto = require("crypto");


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