JS逆向 -- 某平台登录加密分析

一、打开网站，使用账号密码登录

账号：[e-mail]
密码：123456

二、通过F12抓包，抓到如下数据，发现密码加密了

三、加密结果是32位，首先考虑是md5加密。

四、全局搜索pwd，点击右上角，点击搜索

五、挨个文件查看，然后局部搜索“pwd:”，快捷键ctrl+f

六、找到给pwd赋值的语句，双击左边，下断，

七、重新点击登录按钮，会自动断下来

八、选中“m(n.pwd.substr(0, 16))”，鼠标放上去，自动提示加密结果，可以分析除，是m函数进行了加密

九、把鼠标放到m函数上，自动弹出下面的对话框，可以查看m函数所在的位置，点击进入该函数

十、这是一个匿名函数

十一、将该函数的同作用域范围的函数都复制到调试软件，并将该匿名函数改为aiyou函数，点击加载代码，成功加载

十二、调用该函数，双击该函数，输入参数，点击运行获取结果

十三、Python代码实现

1、将该JS代码复制jiami.js文件

function getpwd(pwd) {return pwd;
}function l(e, t) {var n = (65535 & e) + (65535 & t);return (e >> 16) + (t >> 16) + (n >> 16) << 16 | 65535 & n}function a(e, t, n, o, r, i) {return l((t = l(l(t, e), l(o, i))) << r | t >>> 32 - r, n)}function p(e, t, n, o, r, i, s) {return a(t & n | ~t & o, e, t, r, i, s)}function f(e, t, n, o, r, i, s) {return a(t & o | n & ~o, e, t, r, i, s)}function m(e, t, n, o, r, i, s) {return a(t ^ n ^ o, e, t, r, i, s)}function g(e, t, n, o, r, i, s) {return a(n ^ (t | ~o), e, t, r, i, s)}function s(e, t) {e[t >> 5] |= 128 << t % 32,e[14 + (t + 64 >>> 9 << 4)] = t;for (var n, o, r, d, i = 1732584193, s = -271733879, a = -1732584194, c = 271733878, u = 0; u < e.length; u += 16)i = p(n = i, o = s, r = a, d = c, e[u], 7, -680876936),c = p(c, i, s, a, e[u + 1], 12, -389564586),a = p(a, c, i, s, e[u + 2], 17, 606105819),s = p(s, a, c, i, e[u + 3], 22, -1044525330),i = p(i, s, a, c, e[u + 4], 7, -176418897),c = p(c, i, s, a, e[u + 5], 12, 1200080426),a = p(a, c, i, s, e[u + 6], 17, -1473231341),s = p(s, a, c, i, e[u + 7], 22, -45705983),i = p(i, s, a, c, e[u + 8], 7, 1770035416),c = p(c, i, s, a, e[u + 9], 12, -1958414417),a = p(a, c, i, s, e[u + 10], 17, -42063),s = p(s, a, c, i, e[u + 11], 22, -1990404162),i = p(i, s, a, c, e[u + 12], 7, 1804603682),c = p(c, i, s, a, e[u + 13], 12, -40341101),a = p(a, c, i, s, e[u + 14], 17, -1502002290),i = f(i, s = p(s, a, c, i, e[u + 15], 22, 1236535329), a, c, e[u + 1], 5, -165796510),c = f(c, i, s, a, e[u + 6], 9, -1069501632),a = f(a, c, i, s, e[u + 11], 14, 643717713),s = f(s, a, c, i, e[u], 20, -373897302),i = f(i, s, a, c, e[u + 5], 5, -701558691),c = f(c, i, s, a, e[u + 10], 9, 38016083),a = f(a, c, i, s, e[u + 15], 14, -660478335),s = f(s, a, c, i, e[u + 4], 20, -405537848),i = f(i, s, a, c, e[u + 9], 5, 568446438),c = f(c, i, s, a, e[u + 14], 9, -1019803690),a = f(a, c, i, s, e[u + 3], 14, -187363961),s = f(s, a, c, i, e[u + 8], 20, 1163531501),i = f(i, s, a, c, e[u + 13], 5, -1444681467),c = f(c, i, s, a, e[u + 2], 9, -51403784),a = f(a, c, i, s, e[u + 7], 14, 1735328473),i = m(i, s = f(s, a, c, i, e[u + 12], 20, -1926607734), a, c, e[u + 5], 4, -378558),c = m(c, i, s, a, e[u + 8], 11, -2022574463),a = m(a, c, i, s, e[u + 11], 16, 1839030562),s = m(s, a, c, i, e[u + 14], 23, -35309556),i = m(i, s, a, c, e[u + 1], 4, -1530992060),c = m(c, i, s, a, e[u + 4], 11, 1272893353),a = m(a, c, i, s, e[u + 7], 16, -155497632),s = m(s, a, c, i, e[u + 10], 23, -1094730640),i = m(i, s, a, c, e[u + 13], 4, 681279174),c = m(c, i, s, a, e[u], 11, -358537222),a = m(a, c, i, s, e[u + 3], 16, -722521979),s = m(s, a, c, i, e[u + 6], 23, 76029189),i = m(i, s, a, c, e[u + 9], 4, -640364487),c = m(c, i, s, a, e[u + 12], 11, -421815835),a = m(a, c, i, s, e[u + 15], 16, 530742520),i = g(i, s = m(s, a, c, i, e[u + 2], 23, -995338651), a, c, e[u], 6, -198630844),c = g(c, i, s, a, e[u + 7], 10, 1126891415),a = g(a, c, i, s, e[u + 14], 15, -1416354905),s = g(s, a, c, i, e[u + 5], 21, -57434055),i = g(i, s, a, c, e[u + 12], 6, 1700485571),c = g(c, i, s, a, e[u + 3], 10, -1894986606),a = g(a, c, i, s, e[u + 10], 15, -1051523),s = g(s, a, c, i, e[u + 1], 21, -2054922799),i = g(i, s, a, c, e[u + 8], 6, 1873313359),c = g(c, i, s, a, e[u + 15], 10, -30611744),a = g(a, c, i, s, e[u + 6], 15, -1560198380),s = g(s, a, c, i, e[u + 13], 21, 1309151649),i = g(i, s, a, c, e[u + 4], 6, -145523070),c = g(c, i, s, a, e[u + 11], 10, -1120210379),a = g(a, c, i, s, e[u + 2], 15, 718787259),s = g(s, a, c, i, e[u + 9], 21, -343485551),i = l(i, n),s = l(s, o),a = l(a, r),c = l(c, d);return [i, s, a, c]}function c(e) {for (var t = "", n = 0; n < 32 * e.length; n += 8)t += String.fromCharCode(e[n >> 5] >>> n % 32 & 255);return t}function u(e) {var t, n = [];for (n[(e.length >> 2) - 1] = void 0,t = 0; t < n.length; t += 1)n[t] = 0;for (t = 0; t < 8 * e.length; t += 8)n[t >> 5] |= (255 & e.charCodeAt(t / 8)) << t % 32;return n}function o(e) {for (var t, n = "0123456789abcdef", o = "", r = 0; r < e.length; r += 1)t = e.charCodeAt(r),o += n.charAt(t >>> 4 & 15) + n.charAt(15 & t);return o}function d(e) {return unescape(encodeURIComponent(e))}function r(e) {return c(s(u(e = d(e)), 8 * e.length))}function i(e, t) {var n, e = d(e), t = d(t), o = u(e), r = [], i = [];for (r[15] = i[15] = void 0,16 < o.length && (o = s(o, 8 * e.length)),n = 0; n < 16; n += 1)r[n] = 909522486 ^ o[n],i[n] = 1549556828 ^ o[n];return e = s(r.concat(u(t)), 512 + 8 * t.length),c(s(i.concat(e), 640))}function aiyou(e, t, n) {return t ? n ? i(t, e) : o(i(t, e)) : n ? r(e) : o(r(e))}

2、python调用js代码