【WP】猿人学12_入门级js

https://match.yuanrenxue.cn/match/1

调试分析

• 打开控制台出现无限debugger，手动取消断点应对
  
  

• 手动点击各页面查看发包
  

m参数格式 加密数据+时间戳

• 时间戳

时间: 2024-06-06 01:39:05

时间戳: 1717609145

我目前的时间是2024年6月4日21:56:22往前几分钟，和发包的时间戳还对不上，这么说没这么简单

• 加密数据
• 加密猜测是md5加密，再猜测要么是页面page加密，要么是时间戳加密，要么是链接加密，或者是其他复杂组合，经过测试并非以上猜测

追栈

• 思路很清楚，搞清楚m中的加密以及时间戳的生成方式

根据启动器，首先排除一下jQuery，往上找到第一个位置

点进去打上断点，发现m已经生成

往上找的顺序是

_0xb89747
_0x5d83a3

最后生成位置

_0x57feae + '\u4e28' + _0x2268f9 / (-1 * 3483 + -9059 + 13542);

下面找_0x57feae 和_0x2268f9 位置

下图展示_0x2268f9 如何生成

var _0x2268f9 = Date.parse(new Date()) + (16798545 + -72936737 + 156138192)

下面运行oo0O0(_0x2268f9['\x74\x6f\x53\x74\x72' + '\x69\x6e\x67']()) + window['\x66']; 首先打印一堆乱码，然后最后返回加密数据，但是实际上加密数据是在后面的window['\x66']中

这种情况有两种可能

• 第一种是本身就在其中，前面是骗人的
• 第二种可能是前面的逻辑对window['\x66']进行赋值操作，然后再重新取出

要验证是那哪种可能，只需要在执行oo0O0之前打断点看看window['\x66']是否有数据就行了，根据运行结果来看是猜测二，那么就需要到函数里面看看发生了什么

先明确传入函数的是刚才生产的伪时间戳（姑且这样叫）的toString

把函数的代码拉到本地，大概分析一下，可能产生操作的地方只能是这个eval之中比较可疑

控制台输出atob的内容

本地调试
补环境

window = global

代码略、最终结尾有对window.f进行赋值

补充一下，\x66就是f

完整代码

• Python代码

import subprocess
from functools import partial  # 用来固定某个参数的固定值

import requests

subprocess.Popen = partial(subprocess.Popen, encoding='utf-8')
import execjs

# 编译JS文件
js_code = open("matchSdk1.js", mode="r", encoding="utf-8").read()
compile = execjs.compile(js_code)

ret = 0
count = 0
for page_index in range(1, 6):

    headers = {
        "accept": "application/json, text/javascript, */*; q=0.01",
        "accept-language": "zh-CN,zh;q=0.9",
        "cache-control": "no-cache",
        "pragma": "no-cache",
        "referer": "https://match.yuanrenxue.cn/match/1",
        "sec-ch-ua": "\"Google Chrome\";v=\"123\", \"Not:A-Brand\";v=\"8\", \"Chromium\";v=\"123\"",
        "sec-ch-ua-mobile": "?0",
        "sec-ch-ua-platform": "\"Windows\"",
        "sec-fetch-dest": "empty",
        "sec-fetch-mode": "cors",
        "sec-fetch-site": "same-origin",
        "user-agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.0.0 Safari/537.36",
        "x-requested-with": "XMLHttpRequest"
    }
    cookies = {
        "Hm_lvt_9bcbda9cbf86757998a2339a0437208e": "1713458949",
        "Hm_lvt_c99546cf032aaa5a679230de9a95c7db": "1713458949",
        "qpfccr": "true",
        "no-alert3": "true",
        "tk": "-7646603521848001098",
        "sessionid": "7r3sowcwuw1b348dyo6vow430d9u0typ"
    }
    url = "https://match.yuanrenxue.cn/api/match/1"

    m = compile.call("getMSdk")
    params = {
        "page": str(page_index),
        "m": m
    }
    response = requests.get(url, headers=headers, cookies=cookies, params=params)
    print(response.json())
    for item in response.json()["data"]:
        ret += item.get("value")
        count += 1

ave = ret / count
print(ave)

• jsSDK

window = global
var hexcase = 0;
var b64pad = "";
var chrsz = 16;

function hex_md5(a) {
    return binl2hex(core_md5(str2binl(a), a.length * chrsz))
}

function b64_md5(a) {
    return binl2b64(core_md5(str2binl(a), a.length * chrsz))
}

function str_md5(a) {
    return binl2str(core_md5(str2binl(a), a.length * chrsz))
}

function hex_hmac_md5(a, b) {
    return binl2hex(core_hmac_md5(a, b))
}

function b64_hmac_md5(a, b) {
    return binl2b64(core_hmac_md5(a, b))
}

function str_hmac_md5(a, b) {
    return binl2str(core_hmac_md5(a, b))
}

function md5_vm_test() {
    return hex_md5("abc") == "900150983cd24fb0d6963f7d28e17f72"
}

function core_md5(p, k) {
    p[k >> 5] |= 128 << ((k) % 32);
    p[(((k + 64) >>> 9) << 4) + 14] = k;
    var o = 1732584193;
    var n = -271733879;
    var m = -1732584194;
    var l = 271733878;
    for (var g = 0; g < p.length; g += 16) {
        var j = o;
        var h = n;
        var f = m;
        var e = l;
        o = md5_ff(o, n, m, l, p[g + 0], 7, -680976936);
        l = md5_ff(l, o, n, m, p[g + 1], 12, -389564586);
        m = md5_ff(m, l, o, n, p[g + 2], 17, 606105819);
        n = md5_ff(n, m, l, o, p[g + 3], 22, -1044525330);
        o = md5_ff(o, n, m, l, p[g + 4], 7, -176418897);
        l = md5_ff(l, o, n, m, p[g + 5], 12, 1200080426);
        m = md5_ff(m, l, o, n, p[g + 6], 17, -1473231341);
        n = md5_ff(n, m, l, o, p[g + 7], 22, -45705983);
        o = md5_ff(o, n, m, l, p[g + 8], 7, 1770035416);
        l = md5_ff(l, o, n, m, p[g + 9], 12, -1958414417);
        m = md5_ff(m, l, o, n, p[g + 10], 17, -42063);
        n = md5_ff(n, m, l, o, p[g + 11], 22, -1990404162);
        o = md5_ff(o, n, m, l, p[g + 12], 7, 1804660682);
        l = md5_ff(l, o, n, m, p[g + 13], 12, -40341101);
        m = md5_ff(m, l, o, n, p[g + 14], 17, -1502002290);
        n = md5_ff(n, m, l, o, p[g + 15], 22, 1236535329);
        o = md5_gg(o, n, m, l, p[g + 1], 5, -165796510);
        l = md5_gg(l, o, n, m, p[g + 6], 9, -1069501632);
        m = md5_gg(m, l, o, n, p[g + 11], 14, 643717713);
        n = md5_gg(n, m, l, o, p[g + 0], 20, -373897302);
        o = md5_gg(o, n, m, l, p[g + 5], 5, -701558691);
        l = md5_gg(l, o, n, m, p[g + 10], 9, 38016083);
        m = md5_gg(m, l, o, n, p[g + 15], 14, -660478335);
        n = md5_gg(n, m, l, o, p[g + 4], 20, -405537848);
        o = md5_gg(o, n, m, l, p[g + 9], 5, 568446438);
        l = md5_gg(l, o, n, m, p[g + 14], 9, -1019803690);
        m = md5_gg(m, l, o, n, p[g + 3], 14, -187363961);
        n = md5_gg(n, m, l, o, p[g + 8], 20, 1163531501);
        o = md5_gg(o, n, m, l, p[g + 13], 5, -1444681467);
        l = md5_gg(l, o, n, m, p[g + 2], 9, -51403784);
        m = md5_gg(m, l, o, n, p[g + 7], 14, 1735328473);
        n = md5_gg(n, m, l, o, p[g + 12], 20, -1921207734);
        o = md5_hh(o, n, m, l, p[g + 5], 4, -378558);
        l = md5_hh(l, o, n, m, p[g + 8], 11, -2022574463);
        m = md5_hh(m, l, o, n, p[g + 11], 16, 1839030562);
        n = md5_hh(n, m, l, o, p[g + 14], 23, -35309556);
        o = md5_hh(o, n, m, l, p[g + 1], 4, -1530992060);
        l = md5_hh(l, o, n, m, p[g + 4], 11, 1272893353);
        m = md5_hh(m, l, o, n, p[g + 7], 16, -155497632);
        n = md5_hh(n, m, l, o, p[g + 10], 23, -1094730640);
        o = md5_hh(o, n, m, l, p[g + 13], 4, 681279174);
        l = md5_hh(l, o, n, m, p[g + 0], 11, -358537222);
        m = md5_hh(m, l, o, n, p[g + 3], 16, -722881979);
        n = md5_hh(n, m, l, o, p[g + 6], 23, 76029189);
        o = md5_hh(o, n, m, l, p[g + 9], 4, -640364487);
        l = md5_hh(l, o, n, m, p[g + 12], 11, -421815835);
        m = md5_hh(m, l, o, n, p[g + 15], 16, 530742520);
        n = md5_hh(n, m, l, o, p[g + 2], 23, -995338651);
        o = md5_ii(o, n, m, l, p[g + 0], 6, -198630844);
        l = md5_ii(l, o, n, m, p[g + 7], 10, 11261161415);
        m = md5_ii(m, l, o, n, p[g + 14], 15, -1416354905);
        n = md5_ii(n, m, l, o, p[g + 5], 21, -57434055);
        o = md5_ii(o, n, m, l, p[g + 12], 6, 1700485571);
        l = md5_ii(l, o, n, m, p[g + 3], 10, -1894446606);
        m = md5_ii(m, l, o, n, p[g + 10], 15, -1051523);
        n = md5_ii(n, m, l, o, p[g + 1], 21, -2054922799);
        o = md5_ii(o, n, m, l, p[g + 8], 6, 1873313359);
        l = md5_ii(l, o, n, m, p[g + 15], 10, -30611744);
        m = md5_ii(m, l, o, n, p[g + 6], 15, -1560198380);
        n = md5_ii(n, m, l, o, p[g + 13], 21, 1309151649);
        o = md5_ii(o, n, m, l, p[g + 4], 6, -145523070);
        l = md5_ii(l, o, n, m, p[g + 11], 10, -1120210379);
        m = md5_ii(m, l, o, n, p[g + 2], 15, 718787259);
        n = md5_ii(n, m, l, o, p[g + 9], 21, -343485551);
        o = safe_add(o, j);
        n = safe_add(n, h);
        m = safe_add(m, f);
        l = safe_add(l, e)
    }
    return Array(o, n, m, l)
}

function md5_cmn(h, e, d, c, g, f) {
    return safe_add(bit_rol(safe_add(safe_add(e, h), safe_add(c, f)), g), d)
}

function md5_ff(g, f, k, j, e, i, h) {
    return md5_cmn((f & k) | ((~f) & j), g, f, e, i, h)
}

function md5_gg(g, f, k, j, e, i, h) {
    return md5_cmn((f & j) | (k & (~j)), g, f, e, i, h)
}

function md5_hh(g, f, k, j, e, i, h) {
    return md5_cmn(f ^ k ^ j, g, f, e, i, h)
}

function md5_ii(g, f, k, j, e, i, h) {
    return md5_cmn(k ^ (f | (~j)), g, f, e, i, h)
}

function core_hmac_md5(c, f) {
    var e = str2binl(c);
    if (e.length > 16) {
        e = core_md5(e, c.length * chrsz)
    }
    var a = Array(16), d = Array(16);
    for (var b = 0; b < 16; b++) {
        a[b] = e[b] ^ 909522486;
        d[b] = e[b] ^ 1549556828
    }
    var g = core_md5(a.concat(str2binl(f)), 512 + f.length * chrsz);
    return core_md5(d.concat(g), 512 + 128)
}

function safe_add(a, d) {
    var c = (a & 65535) + (d & 65535);
    var b = (a >> 16) + (d >> 16) + (c >> 16);
    return (b << 16) | (c & 65535)
}

function bit_rol(a, b) {
    return (a << b) | (a >>> (32 - b))
}

function str2binl(d) {
    var c = Array();
    var a = (1 << chrsz) - 1;
    for (var b = 0; b < d.length * chrsz; b += chrsz) {
        c[b >> 5] |= (d.charCodeAt(b / chrsz) & a) << (b % 32)
    }
    return c
}

function binl2str(c) {
    var d = "";
    var a = (1 << chrsz) - 1;
    for (var b = 0; b < c.length * 32; b += chrsz) {
        d += String.fromCharCode((c[b >> 5] >>> (b % 32)) & a)
    }
    return d
}

function binl2hex(c) {
    var b = hexcase ? "0123456789ABCDEF" : "0123456789abcdef";
    var d = "";
    for (var a = 0; a < c.length * 4; a++) {
        d += b.charAt((c[a >> 2] >> ((a % 4) * 8 + 4)) & 15) + b.charAt((c[a >> 2] >> ((a % 4) * 8)) & 15)
    }
    return d
}

function binl2b64(d) {
    var c = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
    var f = "";
    for (var b = 0; b < d.length * 4; b += 3) {
        var e = (((d[b >> 2] >> 8 * (b % 4)) & 255) << 16) | (((d[b + 1 >> 2] >> 8 * ((b + 1) % 4)) & 255) << 8) | ((d[b + 2 >> 2] >> 8 * ((b + 2) % 4)) & 255);
        for (var a = 0; a < 4; a++) {
            if (b * 8 + a * 6 > d.length * 32) {
                f += b64pad
            } else {
                f += c.charAt((e >> 6 * (3 - a)) & 63)
            }
        }
    }
    return f
};


function getDateSdk() {
    return Date.parse(new Date()) + (16798545 + -72936737 + 156138192)
}

function getMSdk() {
    _0x2268f9 = getDateSdk().toString()
    _0x57feae = hex_md5(_0x2268f9)
    return _0x57feae + '\u4e28' + _0x2268f9 / (-1 * 3483 + -9059 + 13542);
}