web逆向实操-1

JS逆向-实操带你领略逆向的魅力

背景：停滞不进的三脚猫功夫应对不了运营产品日益增长的需求了😁，需要闭关修炼。

猿人学《第一届web端爬虫攻防大赛》题目1：抓取所有（5页）机票的价格，并计算所有机票价格的平均值，填入答案。地址：http://match.yuanrenxue.com/match/1

1、分析url

用network抓到的链接是http://match.yuanrenxue.com/api/match/1?m=d4b5e130853e58d66aaaf21c82ceef6b%E4%B8%A81627967988
观察m参数可知，末尾是时间戳，紧挨着是url编码。转换后的m是d4b5e130853e58d66aaaf21c82ceef6丨1627967988，注意这个是中文符号。charles能自动转码，用charles可验证一下。

url编码就是一个字符ascii码的十六进制。不过稍微有些变动，需要在前面加上“%”。比如“\”，它的ascii码是92，92的十六进制是5c，所以“\”的url编码就是%5c。
时间戳 16开头的10或13位数字，如1627870080，17开头是2024年。

2、关闭断点

右键-never pause here。或把函数置空(override)

3、找加密逻辑

一些思路：全局搜索、调用栈、hook等。
找到请求接口/api/match/1所在函数：下一个XHR断点，查看call stack-request。

JS反混淆工具

// _0xb89747是一个对象
_0xb89747 = {page: 2, m: "482a7481bcf7c23505e126e72b8c94a2丨1628154188"}

查看代码

_0x2268f9 = Date['\x70\x61\x72\x73\x65'](new Date()) + (16798545 + -72936737 + 156138192)
_0x57feae = oo0O0(_0x2268f9['\x74\x6f\x53\x74\x72' + '\x69\x6e\x67']()) + window['\x66'];
_0x5d83a3['\x6d'] = _0x57feae + '\u4e28' + _0x2268f9 / (-1 * 3483 + -9059 + 13542);

在console里面打印，翻译后为

_0x2268f9 = Date.parse(new Date()) + 100000000
_0x57feae = oo0O0(_0x2268f9.toString()) + window.f
_0x5d83a3[m] = _0x57feae + "丨" + _0x2268f9 / 1000

光标放到oo0O0函数上，点击进入函数内部

</script></div><script src="/static/match/dist/js/main.min.js"></script><script>document.e='fromC';document.f='charCo';document.g='harCode';document.h='deAt';$('.')</script><script src="/static/match/safety/uyt.js"></script><script src="/static/match/safety/uzt.js"></script><script>w();dd();function oo0O0(mw){window.b='';for(var i=0,len=window.a.length;i<len;i++){console.log(window.a[i]);window.b+=String[document.e+document.g](window.a[i][document.f+document.h]()-i-window.c)}var U=['W5r5W6VdIHZcT8kU','WQ8CWRaxWQirAW=='];var J=function(o,E){o=o-0x0;var N=U[o];if(J['bSSGte']===undefined){var Y=function(w){var m='abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789+/=',T=String(w)['replace'](/=+$/,'');var A='';for(var C=0x0,b,W,l=0x0;W=T['charAt'](l++);~W&&(b=C%0x4?b*0x40+W:W,C++%0x4)?A+=String['fromCharCode'](0xff&b>>(-0x2*C&0x6)):0x0){W=m['indexOf'](W)}return A};var t=function(w,m){var T=[],A=0x0,C,b='',W='';w=Y(w);for(var R=0x0,v=w['length'];R<v;R++){W+='%'+('00'+w['charCodeAt'](R)['toString'](0x10))['slice'](-0x2)}w=decodeURIComponent(W);var l;for(l=0x0;l<0x100;l++){T[l]=l}for(l=0x0;l<0x100;l++){A=(A+T[l]+m['charCodeAt'](l%m['length']))%0x100,C=T[l],T[l]=T[A],T[A]=C}l=0x0,A=0x0;for(var L=0x0;L<w['length'];L++){l=(l+0x1)%0x100,A=(A+T[l])%0x100,C=T[l],T[l]=T[A],T[A]=C,b+=String['fromCharCode'](w['charCodeAt'](L)^T[(T[l]+T[A])%0x100])}return b};J['luAabU']=t,J['qlVPZg']={},J['bSSGte']=!![]}var H=J['qlVPZg'][o];return H===undefined?(J['TUDBIJ']===undefined&&(J['TUDBIJ']=!![]),N=J['luAabU'](N,E),J['qlVPZg'][o]=N):N=H,N};eval(atob(window['b'])[J('0x0',']dQW')](J('0x1','GTu!'),'\x27'+mw+'\x27'));return''}</script><script>eval('window[\'\\x75\\x72\\x6c\'] = \'\\x2f\\x61\\x70\\x69\\x2f\' + \'\\x6d\\x61\\x74\\x63\\x68\' + \'\\x2f\\x31\', request = function () {\n    var _0x2268f9 = Date[\'\\x70\\x61\\x72\\x73\\x65\'](new Date()) + (16798545 + -72936737 + 156138192), _0x57feae = oo0O0(_0x2268f9[\'\\x74\\x6f\\x53\\x74\\x72\' + \'\\x69\\x6e\\x67\']()) + window[\'\\x66\'];\n    const _0x5d83a3 = {};\n    _0x5d83a3[\'\\x70\\x61\\x67\\x65\'] = window[\'\\x70\\x61\\x67\\x65\'], _0x5d83a3[\'\\x6d\'] = _0x57feae + \'\\u4e28\' + _0x2268f9 / (-1 * 3483 + -9059 + 13542);\n    var _0xb89747 = _0x5d83a3;\n    $[\'\\x61\\x6a\\x61\\x78\']({\n        \'\\x75\\x72\\x6c\': window[\'\\x75\\x72\\x6c\'],\n        \'\\x64\\x61\\x74\\x61\\x54\\x79\\x70\\x65\': \'\\x6a\\x73\\x6f\\x6e\',\n        \'\\x61\\x73\\x79\\x6e\\x63\': ![],\n        \'\\x64\\x61\\x74\\x61\': _0xb89747,\n        \'\\x74\\x79\\x70\\x65\': \'\\x47\\x45\\x54\',\n        \'\\x62\\x65\\x66\\x6f\\x72\\x65\\x53\\x65\\x6e\\x64\': function (_0x4c488e) {\n        },\n        \'\\x73\\x75\\x63\\x63\\x65\\x73\\x73\': function (_0x131e59) {\n            _0x131e59 = _0x131e59[\'\\x64\\x61\\x74\\x61\'];\n            let _0x354583 = \'\', _0x1b89ba = \'\\x3c\\x64\\x69\\x76\\x20\' + \'\\x63\\x6c\\x61\\x73\\x73\' + 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\'\\u5370\\u5ea6\\u767e\\u6377\\u822a\' + \'\\u7a7a\',\n                    \'\\u8d8a\\u5357\\u822a\\u7a7a\',\n                    \'\\u8fdc\\u4e1c\\u822a\\u7a7a\',\n                    \'\\u5370\\u5ea6\\u822a\\u7a7a\\u516c\' + \'\\u53f8\',\n                    \'\\u5370\\u5ea6\\u6377\\u7279\\u822a\' + \'\\u7a7a\\u6709\\u9650\\u516c\\u53f8\',\n                    \'\\u4ee5\\u8272\\u5217\\u822a\\u7a7a\' + \'\\u516c\\u53f8\',\n                    \'\\u610f\\u5927\\u5229\\u822a\\u7a7a\',\n                    \'\\u4f0a\\u6717\\u822a\\u7a7a\\u516c\' + \'\\u53f8\',\n                    \'\\u5370\\u5ea6\\u5c3c\\u897f\\u4e9a\' + \'\\u9e70\\u822a\\u7a7a\\u516c\\u53f8\',\n                    \'\\u82f1\\u56fd\\u822a\\u7a7a\\u516c\' + \'\\u53f8\',\n                    \'\\u897f\\u65b9\\u5929\\u7a7a\\u822a\' + \'\\u7a7a\',\n                    \'\\u897f\\u6377\\u822a\\u7a7a\',\n                    \'\\u897f\\u73ed\\u7259\\u6b27\\u6d32\' + \'\\u822a\\u7a7a\\u516c\\u53f8\',\n                    \'\\u897f\\u73ed\\u7259\\u822a\\u7a7a\' + \'\\u516c\\u53f8\'\n                ], _0x5286d2 = 22 * 251 + -1721 + -3800, _0xa24ff9 = [\n                    \'\\u5317\\u4eac\\u9996\\u90fd\\u56fd\' + \'\\u9645\\u673a\\u573a\',\n                    \'\\u4e0a\\u6d77\\u8679\\u6865\\u56fd\' + \'\\u9645\\u673a\\u573a\',\n                    \'\\u4e0a\\u6d77\\u6d66\\u4e1c\\u56fd\' + \'\\u9645\\u673a\\u573a\',\n                    \'\\u5929\\u6d25\\u6ee8\\u6d77\\u56fd\' + \'\\u9645\\u673a\\u573a\',\n                    \'\\u592a\\u539f\\u6b66\\u5bbf\\u673a\' + \'\\u573a\',\n                    \'\\u547c\\u548c\\u6d69\\u7279\\u767d\' + \'\\u5854\\u673a\\u573a\',\n                    \'\\u6c88\\u9633\\u6843\\u4ed9\\u56fd\' + \'\\u9645\\u673a\\u573a\',\n                    \'\\u5927\\u8fde\\u5468\\u6c34\\u5b50\' + \'\\u56fd\\u9645\\u673a\\u573a\',\n                    \'\\u957f\\u6625\\u5927\\u623f\\u8eab\' + \'\\u673a\\u573a\',\n                    \'\\u54c8\\u5c14\\u6ee8\\u960e\\u5bb6\' + \'\\u5c97\\u56fd\\u9645\\u673a\\u573a\',\n                    \'\\u9f50\\u9f50\\u54c8\\u5c14\\u4e09\' + \'\\u5bb6\\u5b50\\u673a\\u573a\',\n                    \'\\u4f73\\u6728\\u65af\\u4e1c\\u90ca\' + \'\\u673a\\u573a\',\n                    \'\\u53a6\\u95e8\\u9ad8\\u5d0e\\u56fd\' + \'\\u9645\\u673a\\u573a\',\n                    \'\\u798f\\u5dde\\u957f\\u4e50\\u56fd\' + \'\\u9645\\u673a\\u573a\',\n                    \'\\u676d\\u5dde\\u8427\\u5c71\\u56fd\' + \'\\u9645\\u673a\\u573a\',\n                    \'\\u5408\\u80a5\\u9a86\\u5c97\\u673a\' + \'\\u573a\',\n                    \'\\u5b81\\u6ce2\\u680e\\u793e\\u673a\' + \'\\u573a\',\n                    \'\\u5357\\u4eac\\u7984\\u53e3\\u56fd\' + \'\\u9645\\u673a\\u573a\',\n                    \'\\u5e7f\\u5dde\\u767d\\u4e91\\u56fd\' + \'\\u9645\\u673a\\u573a\',\n                    \'\\u6df1\\u5733\\u5b9d\\u5b89\\u56fd\' + \'\\u9645\\u673a\\u573a\',\n                    \'\\u957f\\u6c99\\u9ec4\\u82b1\\u673a\' + \'\\u573a\',\n                    \'\\u6d77\\u53e3\\u7f8e\\u4e9a\\u673a\' + \'\\u573a\',\n                    \'\\u6b66\\u6c49\\u5929\\u6cb3\\u673a\' + \'\\u573a\',\n                    \'\\u6d4e\\u5357\\u9065\\u5899\\u673a\' + \'\\u573a\',\n                    \'\\u9752\\u5c9b\\u6d41\\u4ead\\u673a\' + \'\\u573a\',\n                    \'\\u5357\\u5b81\\u5434\\u589f\\u673a\' + \'\\u573a\',\n                    \'\\u4e09\\u4e9a\\u51e4\\u51f0\\u56fd\' + \'\\u9645\\u673a\\u573a\',\n                    \'\\u91cd\\u5e86\\u6c5f\\u5317\\u56fd\' + \'\\u9645\\u673a\\u573a\',\n                    \'\\u6210\\u90fd\\u53cc\\u6d41\\u56fd\' + \'\\u9645\\u673a\\u573a\',\n                    \'\\u6606\\u660e\\u5deb\\u5bb6\\u575d\' + \'\\u56fd\\u9645\\u673a\\u573a\',\n                    \'\\u6606\\u660e\\u957f\\u6c34\\u56fd\' + \'\\u9645\\u673a\\u573a\',\n                    \'\\u6842\\u6797\\u4e24\\u6c5f\\u56fd\' + \'\\u9645\\u673a\\u573a\',\n                    \'\\u897f\\u5b89\\u54b8\\u9633\\u56fd\' + \'\\u9645\\u673a\\u573a\',\n                    \'\\u5170\\u5dde\\u4e2d\\u5ddd\\u673a\' + \'\\u573a\',\n                    \'\\u8d35\\u9633\\u9f99\\u6d1e\\u5821\' + \'\\u673a\\u573a\',\n                    \'\\u62c9\\u8428\\u8d21\\u560e\\u673a\' + \'\\u573a\',\n                    \'\\u4e4c\\u9c81\\u6728\\u9f50\\u5730\' + \'\\u7a9d\\u5821\\u673a\\u573a\',\n                    \'\\u5357\\u660c\\u5411\\u5858\\u673a\' + \'\\u573a\',\n                    \'\\u90d1\\u5dde\\u65b0\\u90d1\\u673a\' + \'\\u573a\',\n                    \'\\u5317\\u4eac\\u9996\\u90fd\\u56fd\' + \'\\u9645\\u673a\\u573a\',\n                    \'\\u4e0a\\u6d77\\u8679\\u6865\\u56fd\' + \'\\u9645\\u673a\\u573a\',\n                    \'\\u4e0a\\u6d77\\u6d66\\u4e1c\\u56fd\' + \'\\u9645\\u673a\\u573a\',\n                    \'\\u5929\\u6d25\\u6ee8\\u6d77\\u56fd\' + \'\\u9645\\u673a\\u573a\',\n                    \'\\u592a\\u539f\\u6b66\\u5bbf\\u673a\' + \'\\u573a\',\n                    \'\\u547c\\u548c\\u6d69\\u7279\\u767d\' + \'\\u5854\\u673a\\u573a\',\n                    \'\\u6c88\\u9633\\u6843\\u4ed9\\u56fd\' + \'\\u9645\\u673a\\u573a\',\n                    \'\\u5927\\u8fde\\u5468\\u6c34\\u5b50\' + \'\\u56fd\\u9645\\u673a\\u573a\',\n                    \'\\u957f\\u6625\\u5927\\u623f\\u8eab\' + \'\\u673a\\u573a\',\n                    \'\\u54c8\\u5c14\\u6ee8\\u960e\\u5bb6\' + \'\\u5c97\\u56fd\\u9645\\u673a\\u573a\',\n                    \'\\u9f50\\u9f50\\u54c8\\u5c14\\u4e09\' + \'\\u5bb6\\u5b50\\u673a\\u573a\',\n                    \'\\u4f73\\u6728\\u65af\\u4e1c\\u90ca\' + \'\\u673a\\u573a\',\n                    \'\\u53a6\\u95e8\\u9ad8\\u5d0e\\u56fd\' + \'\\u9645\\u673a\\u573a\',\n                    \'\\u798f\\u5dde\\u957f\\u4e50\\u56fd\' + \'\\u9645\\u673a\\u573a\',\n                    \'\\u676d\\u5dde\\u8427\\u5c71\\u56fd\' + \'\\u9645\\u673a\\u573a\',\n                    \'\\u5408\\u80a5\\u9a86\\u5c97\\u673a\' + \'\\u573a\',\n                    \'\\u5b81\\u6ce2\\u680e\\u793e\\u673a\' + \'\\u573a\',\n                    \'\\u5357\\u4eac\\u7984\\u53e3\\u56fd\' + \'\\u9645\\u673a\\u573a\',\n                    \'\\u5e7f\\u5dde\\u767d\\u4e91\\u56fd\' + \'\\u9645\\u673a\\u573a\',\n                    \'\\u6df1\\u5733\\u5b9d\\u5b89\\u56fd\' + \'\\u9645\\u673a\\u573a\',\n                    \'\\u957f\\u6c99\\u9ec4\\u82b1\\u673a\' + \'\\u573a\',\n                    \'\\u6d77\\u53e3\\u7f8e\\u4e9a\\u673a\' + \'\\u573a\',\n                    \'\\u6b66\\u6c49\\u5929\\u6cb3\\u673a\' + \'\\u573a\',\n                    \'\\u6d4e\\u5357\\u9065\\u5899\\u673a\' + \'\\u573a\',\n                    \'\\u9752\\u5c9b\\u6d41\\u4ead\\u673a\' + \'\\u573a\',\n                    \'\\u5357\\u5b81\\u5434\\u589f\\u673a\' + \'\\u573a\',\n                    \'\\u4e09\\u4e9a\\u51e4\\u51f0\\u56fd\' + \'\\u9645\\u673a\\u573a\',\n                    \'\\u91cd\\u5e86\\u6c5f\\u5317\\u56fd\' + \'\\u9645\\u673a\\u573a\',\n                    \'\\u6210\\u90fd\\u53cc\\u6d41\\u56fd\' + \'\\u9645\\u673a\\u573a\',\n                    \'\\u6606\\u660e\\u5deb\\u5bb6\\u575d\' + \'\\u56fd\\u9645\\u673a\\u573a\',\n                    \'\\u6606\\u660e\\u957f\\u6c34\\u56fd\' + \'\\u9645\\u673a\\u573a\',\n                    \'\\u6842\\u6797\\u4e24\\u6c5f\\u56fd\' + \'\\u9645\\u673a\\u573a\',\n                    \'\\u897f\\u5b89\\u54b8\\u9633\\u56fd\' + \'\\u9645\\u673a\\u573a\',\n                    \'\\u5170\\u5dde\\u4e2d\\u5ddd\\u673a\' + \'\\u573a\',\n                    \'\\u8d35\\u9633\\u9f99\\u6d1e\\u5821\' + \'\\u673a\\u573a\',\n                    \'\\u62c9\\u8428\\u8d21\\u560e\\u673a\' + \'\\u573a\',\n                    \'\\u4e4c\\u9c81\\u6728\\u9f50\\u5730\' + \'\\u7a9d\\u5821\\u673a\\u573a\',\n                    \'\\u5357\\u660c\\u5411\\u5858\\u673a\' + \'\\u573a\',\n                    \'\\u90d1\\u5dde\\u65b0\\u90d1\\u673a\' + \'\\u573a\'\n                ];\n            if (window[\'\\x70\\x61\\x67\\x65\']) {\n            } else\n                window[\'\\x70\\x61\\x67\\x65\'] = 2333 * 3 + 458 * -5 + -4708;\n            $[\'\\x65\\x61\\x63\\x68\'](_0x131e59, function (_0x282f1d, _0x4e0853) {\n                _0x354583 += _0x1b89ba[\'\\x72\\x65\\x70\\x6c\\x61\' + \'\\x63\\x65\'](\'\\x70\\x72\\x69\\x63\\x65\' + \'\\x5f\\x73\\x6f\\x6c\\x65\', _0x4e0853[\'\\x76\\x61\\x6c\\x75\\x65\'])[\'\\x72\\x65\\x70\\x6c\\x61\' + \'\\x63\\x65\'](\'\\u4e2d\\u56fd\\u8054\\u5408\\u822a\' + \'\\u7a7a\', _0x548377[_0x5286d2 * window[\'\\x70\\x61\\x67\\x65\']])[\'\\x72\\x65\\x70\\x6c\\x61\' + \'\\x63\\x65\'](\'\\u5927\\u5174\\u56fd\\u9645\', _0xa24ff9[parseInt(_0x5286d2 * window[\'\\x70\\x61\\x67\\x65\'] / (659 + 785 * -7 + 4838)) + (5666 * 1 + 2 * -4161 + 2657)])[\'\\x72\\x65\\x70\\x6c\\x61\' + \'\\x63\\x65\'](\'\\u5b9d\\u5b89\\u673a\\u573a\', _0xa24ff9[_0xa24ff9[\'\\x6c\\x65\\x6e\\x67\\x74\' + \'\\x68\'] - parseInt(_0x5286d2 * window[\'\\x70\\x61\\x67\\x65\'] / (8357 + -323 * 1 + -8032)) - (350 + -9 * 295 + 2306)]), _0x5286d2 += -156 * -53 + -78 * -111 + -16925;\n            }), $(\'\\x2e\\x6d\\x2d\\x61\\x69\' + \'\\x72\\x66\\x6c\\x79\\x2d\' + \'\\x6c\\x73\\x74\')[\'\\x74\\x65\\x78\\x74\'](\'\')[\'\\x61\\x70\\x70\\x65\\x6e\' + \'\\x64\'](_0x354583);\n        },\n        \'\\x63\\x6f\\x6d\\x70\\x6c\\x65\\x74\\x65\': function () {\n        },\n        \'\\x65\\x72\\x72\\x6f\\x72\': function () {\n            alert(\'\\u6570\\u636e\\u62c9\\u53d6\\u5931\' + \'\\u8d25\\u3002\\u53ef\\u80fd\\u662f\' + \'\\u89e6\\u53d1\\u4e86\\u98ce\\u63a7\' + \'\\u7cfb\\u7edf\\uff0c\\u82e5\\u60a8\' + \'\\u662f\\u6b63\\u5e38\\u8bbf\\u95ee\' + \'\\uff0c\\u8bf7\\u4f7f\\u7528\\u8c37\' + \'\\u6b4c\\u6d4f\\u89c8\\u5668\\u65e0\' + \'\\u75d5\\u6a21\\u5f0f\\uff0c\\u5e76\' + \'\\u4e14\\u6821\\u51c6\\u7535\\u8111\' + \'\\u7684\\u7cfb\\u7edf\\u65f6\\u95f4\' + \'\\u91cd\\u65b0\\u5c1d\\u8bd5\'), alert(\'\\u751f\\u800c\\u4e3a\\u866b\\uff0c\' + \'\\u6211\\u5f88\\u62b1\\u6b49\\uff0c\' + \'\\u8bf7\\u5237\\u65b0\\u9875\\u9762\' + \'\\uff0c\\u67e5\\u770b\\u95ee\\u9898\' + \'\\u662f\\u5426\\u5b58\\u5728\'), $(\'\\x2e\\x70\\x61\\x67\\x65\' + \'\\x2d\\x6d\\x65\\x73\\x73\' + \'\\x61\\x67\\x65\')[\'\\x65\\x71\'](17 * -94 + 1014 + -4 * -146)[\'\\x61\\x64\\x64\\x43\\x6c\' + \'\\x61\\x73\\x73\'](\'\\x61\\x63\\x74\\x69\\x76\' + \'\\x65\'), $(\'\\x2e\\x70\\x61\\x67\\x65\' + \'\\x2d\\x6d\\x65\\x73\\x73\' + \'\\x61\\x67\\x65\')[\'\\x72\\x65\\x6d\\x6f\\x76\' + \'\\x65\\x43\\x6c\\x61\\x73\' + \'\\x73\'](\'\\x61\\x63\\x74\\x69\\x76\' + \'\\x65\');\n        }\n    });\n}, request();');</script><script>window.page=1;$('.page-message').click(function(){window.page=$('.page-message').index(this)+1;request();$('.page-message').removeClass('active');$(this).addClass('active')});$('.next-page').click(function(){if(window.page<=4){window.page+=1;$('.page-message').removeClass('active').eq(window.page-1).addClass('active');request()}});$('.before-page').click(function(){if(window.page>1){window.page-=1;$('.page-message').removeClass('active').eq(window.page-1).addClass('active');request()}});</script><script>successAlert=function(message){let option={hook:{initStart:function(){}},popupTime:0,type:'alert',title:'答案正确',dragOverflow:true,content:'<i class="fas fa-check" style="color: deepskyblue"></i>'+message,};ModalLayer.alert(option)};failedAlert=function(message){let option={popupTime:2,hook:{initStart:function(){}},displayProgressBar:true,displayProgressBarPos:'top',displayProgressBarColor:'red',content:'<i class="fas fa-times" style="color: red"></i>'+message,};ModalLayer.msg(option)};</script><script>$(function(){$("#ajaxSubmit").on("click",function(){$("#ajaxForm").ajaxSubmit({beforeSubmit:function(){},success:function(data){result=data.status_code;if(result==="1"){poster_show()}else if(result==="5"){failedAlert('未登录，请检查登录状态\n您的IP：'+data.IP)}else{failedAlert('答案验证失败，再不...再想想？')}}})})})</script></body></html>

没法格式化，他不讲究。copy放到pycharm里面,点击菜单栏ode-Reformat Code格式化一下。去掉多余的script，得到如下代码：

document.e='fromC';document.f='charCo';document.g='harCode';document.h='deAt';w();dd();
function oo0O0(mw){
    window.b = '';
    for (var i = 0, len = window.a.length; i < len; i++) {
        console.log(window.a[i]);
        window.b += String[document.e + document.g](window.a[i][document.f + document.h]() - i - window.c)
    }
    var U = ['W5r5W6VdIHZcT8kU', 'WQ8CWRaxWQirAW=='];
    var J = function (o, E) {
        o = o - 0x0;
        var N = U[o];
        if (J['bSSGte'] === undefined) {
            var Y = function (w) {
                var m = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789+/=',
                    T = String(w)['replace'](/=+$/, '');
                var A = '';
                for (var C = 0x0, b, W, l = 0x0; W = T['charAt'](l++); ~W && (b = C % 0x4 ? b * 0x40 + W : W, C++ % 0x4) ? A += String['fromCharCode'](0xff & b >> (-0x2 * C & 0x6)) : 0x0) {
                    W = m['indexOf'](W)
                }
                return A
            };
            var t = function (w, m) {
                var T = [], A = 0x0, C, b = '', W = '';
                w = Y(w);
                for (var R = 0x0, v = w['length']; R < v; R++) {
                    W += '%' + ('00' + w['charCodeAt'](R)['toString'](0x10))['slice'](-0x2)
                }
                w = decodeURIComponent(W);
                var l;
                for (l = 0x0; l < 0x100; l++) {
                    T[l] = l
                }
                for (l = 0x0; l < 0x100; l++) {
                    A = (A + T[l] + m['charCodeAt'](l % m['length'])) % 0x100, C = T[l], T[l] = T[A], T[A] = C
                }
                l = 0x0, A = 0x0;
                for (var L = 0x0; L < w['length']; L++) {
                    l = (l + 0x1) % 0x100, A = (A + T[l]) % 0x100, C = T[l], T[l] = T[A], T[A] = C, b += String['fromCharCode'](w['charCodeAt'](L) ^ T[(T[l] + T[A]) % 0x100])
                }
                return b
            };
            J['luAabU'] = t, J['qlVPZg'] = {}, J['bSSGte'] = !![]
        }
        var H = J['qlVPZg'][o];
        return H === undefined ? (J['TUDBIJ'] === undefined && (J['TUDBIJ'] = !![]), N = J['luAabU'](N, E), J['qlVPZg'][o] = N) : N = H, N
    };
    eval(atob(window['b'])[J('0x0', ']dQW')](J('0x1', 'GTu!'), '\x27' + mw + '\x27'));
    return ''
};

观察发现oo0O0函数，做了两件事：

1、return '' 
2、eval(atob(window['b'])[J('0x0', ']dQW')](J('0x1', 'GTu!'), '\x27' + mw + '\x27'));

翻译之后为：

eval(atob(window['b'])['replace']('mwqqppz', 'mw'));
// eval() 函数可计算某个字符串，并执行其中的的 JavaScript 代码。

console里面打印window.b

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

打印atob(window.b),copy到pycharm，Edit-Find-Replace删除多余的转义符，然后格式化：

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
};window.f = hex_md5(mwqqppz)

观察可知，window.b里面是：定义了一个关于md5的加密方法，并把加密结果赋值给window.f。回到刚才oo0O0函数干了两件事：返回了个空，并执行了

eval(atob(window['b'])['replace']('mwqqppz', 'mw'));

也就是，把oo0O0函数传进来的mw参数执行了hex_md5()加密后赋值给window.f。回到前面的代码逻辑

_0x57feae = oo0O0(_0x2268f9.toString()) + window.f
_0x57feae = oo0O0(_0x2268f9.toString()) + hex_md5(_0x2268f9.toString())
_0x57feae = hex_md5(_0x2268f9.toString())
// 由前面代码可知
_0x5d83a3[m] = _0x57feae + "丨" + _0x2268f9 / 1000
// 那么
_0x5d83a3[m] = hex_md5(_0x2268f9.toString()) + "丨" + _0x2268f9 / 1000

至此m参数的逻辑已完全捋清楚。

4、重写加密逻辑并验证

思路：把加密混淆的方法原样不动拿过来，自己执行得到m参数，拼接url，模拟请求
本例中只涉及到了hex_md5加密方法。可以直接把hex_md5加密相关方法作为js字符串交给python执行，或封装成js文件给python加载执行，以得到m参数。

5、遗留

浏览器对象如window、document的变量怎么在python里面定义加载？

参考：
老版本题目
 js逆向技巧分享

最后编辑于：2021.08.06 13:04:20

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