凡科网地址：
https://i.fkw.com/

js代码调试阶段

凡科网搜搜pwd = 快速定位到记录

根据分析，只有这行代码有点可疑，进入该函数实现内部

进来之后，发现这个函数在一个闭包里面（小技巧，只需要将闭包中所有的代码全复制出来调试即可）

将代码全复制到调试工具中，调试成功

爬虫代码编写

fanke.py

import requests
import execjs
#实例化一个node对象
node=execjs.get()
#js源文件编译
ctx=node.compile(open('./fanke.js',encoding='utf-8').read())
#执行指定函数
password=123
funcName='md5("{0}")'.format(password)
pwd=ctx.eval(funcName)
print(pwd)

fanke.js

(function(g) {function o(u, z) {var w = (u & 65535) + (z & 65535),v = (u >> 16) + (z >> 16) + (w >> 16);return (v << 16) | (w & 65535)
}
function s(u, v) {return (u << v) | (u >>> (32 - v))
}
function c(A, w, v, u, z, y) {return o(s(o(o(w, A), o(u, y)), z), v)
}
function b(w, v, B, A, u, z, y) {return c((v & B) | ((~v) & A), w, v, u, z, y)
}
function i(w, v, B, A, u, z, y) {return c((v & A) | (B & (~A)), w, v, u, z, y)
}
function n(w, v, B, A, u, z, y) {return c(v ^ B ^ A, w, v, u, z, y)
}
function a(w, v, B, A, u, z, y) {return c(B ^ (v | (~A)), w, v, u, z, y)
}
function d(F, A) {F[A >> 5] |= 128 << ((A) % 32);F[(((A + 64) >>> 9) << 4) + 14] = A;var w, z, y, v, u, E = 1732584193,D = -271733879,C = -1732584194,B = 271733878;for (w = 0; w < F.length; w += 16) {z = E;y = D;v = C;u = B;E = b(E, D, C, B, F[w], 7, -680876936);B = b(B, E, D, C, F[w + 1], 12, -389564586);C = b(C, B, E, D, F[w + 2], 17, 606105819);D = b(D, C, B, E, F[w + 3], 22, -1044525330);E = b(E, D, C, B, F[w + 4], 7, -176418897);B = b(B, E, D, C, F[w + 5], 12, 1200080426);C = b(C, B, E, D, F[w + 6], 17, -1473231341);D = b(D, C, B, E, F[w + 7], 22, -45705983);E = b(E, D, C, B, F[w + 8], 7, 1770035416);B = b(B, E, D, C, F[w + 9], 12, -1958414417);C = b(C, B, E, D, F[w + 10], 17, -42063);D = b(D, C, B, E, F[w + 11], 22, -1990404162);E = b(E, D, C, B, F[w + 12], 7, 1804603682);B = b(B, E, D, C, F[w + 13], 12, -40341101);C = b(C, B, E, D, F[w + 14], 17, -1502002290);D = b(D, C, B, E, F[w + 15], 22, 1236535329);E = i(E, D, C, B, F[w + 1], 5, -165796510);B = i(B, E, D, C, F[w + 6], 9, -1069501632);C = i(C, B, E, D, F[w + 11], 14, 643717713);D = i(D, C, B, E, F[w], 20, -373897302);E = i(E, D, C, B, F[w + 5], 5, -701558691);B = i(B, E, D, C, F[w + 10], 9, 38016083);C = i(C, B, E, D, F[w + 15], 14, -660478335);D = i(D, C, B, E, F[w + 4], 20, -405537848);E = i(E, D, C, B, F[w + 9], 5, 568446438);B = i(B, E, D, C, F[w + 14], 9, -1019803690);C = i(C, B, E, D, F[w + 3], 14, -187363961);D = i(D, C, B, E, F[w + 8], 20, 1163531501);E = i(E, D, C, B, F[w + 13], 5, -1444681467);B = i(B, E, D, C, F[w + 2], 9, -51403784);C = i(C, B, E, D, F[w + 7], 14, 1735328473);D = i(D, C, B, E, F[w + 12], 20, -1926607734);E = n(E, D, C, B, F[w + 5], 4, -378558);B = n(B, E, D, C, F[w + 8], 11, -2022574463);C = n(C, B, E, D, F[w + 11], 16, 1839030562);D = n(D, C, B, E, F[w + 14], 23, -35309556);E = n(E, D, C, B, F[w + 1], 4, -1530992060);B = n(B, E, D, C, F[w + 4], 11, 1272893353);C = n(C, B, E, D, F[w + 7], 16, -155497632);D = n(D, C, B, E, F[w + 10], 23, -1094730640);E = n(E, D, C, B, F[w + 13], 4, 681279174);B = n(B, E, D, C, F[w], 11, -358537222);C = n(C, B, E, D, F[w + 3], 16, -722521979);D = n(D, C, B, E, F[w + 6], 23, 76029189);E = n(E, D, C, B, F[w + 9], 4, -640364487);B = n(B, E, D, C, F[w + 12], 11, -421815835);C = n(C, B, E, D, F[w + 15], 16, 530742520);D = n(D, C, B, E, F[w + 2], 23, -995338651);E = a(E, D, C, B, F[w], 6, -198630844);B = a(B, E, D, C, F[w + 7], 10, 1126891415);C = a(C, B, E, D, F[w + 14], 15, -1416354905);D = a(D, C, B, E, F[w + 5], 21, -57434055);E = a(E, D, C, B, F[w + 12], 6, 1700485571);B = a(B, E, D, C, F[w + 3], 10, -1894986606);C = a(C, B, E, D, F[w + 10], 15, -1051523);D = a(D, C, B, E, F[w + 1], 21, -2054922799);E = a(E, D, C, B, F[w + 8], 6, 1873313359);B = a(B, E, D, C, F[w + 15], 10, -30611744);C = a(C, B, E, D, F[w + 6], 15, -1560198380);D = a(D, C, B, E, F[w + 13], 21, 1309151649);E = a(E, D, C, B, F[w + 4], 6, -145523070);B = a(B, E, D, C, F[w + 11], 10, -1120210379);C = a(C, B, E, D, F[w + 2], 15, 718787259);D = a(D, C, B, E, F[w + 9], 21, -343485551);E = o(E, z);D = o(D, y);C = o(C, v);B = o(B, u)}return [E, D, C, B]
}
function p(v) {var w, u = "";for (w = 0; w < v.length * 32; w += 8) {u += String.fromCharCode((v[w >> 5] >>> (w % 32)) & 255)}return u
}
function j(v) {var w, u = [];u[(v.length >> 2) - 1] = undefined;for (w = 0; w < u.length; w += 1) {u[w] = 0}for (w = 0; w < v.length * 8; w += 8) {u[w >> 5] |= (v.charCodeAt(w / 8) & 255) << (w % 32)}return u
}
function k(u) {return p(d(j(u), u.length * 8))
}
function f(w, z) {var v, y = j(w),u = [],x = [],A;u[15] = x[15] = undefined;if (y.length > 16) {y = d(y, w.length * 8)}for (v = 0; v < 16; v += 1) {u[v] = y[v] ^ 909522486;x[v] = y[v] ^ 1549556828}A = d(u.concat(j(z)), 512 + z.length * 8);return p(d(x.concat(A), 512 + 128))
}
function t(w) {var z = "0123456789abcdef",v = "",u, y;for (y = 0; y < w.length; y += 1) {u = w.charCodeAt(y);v += z.charAt((u >>> 4) & 15) + z.charAt(u & 15)}return v
}
function m(u) {return unescape(encodeURIComponent(u))
}
function q(u) {return k(m(u))
}
function l(u) {return t(q(u))
}
function h(u, v) {return f(m(u), m(v))
}
function r(u, v) {return t(h(u, v))
}
g.md5 = function(v, w, u) {if (!w) {if (!u) {return l(v)} else {return q(v)}}if (!u) {return r(w, v)} else {return h(w, v)}
}
} (typeof jQuery === "function" ? jQuery: this));

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Python实战|js逆向凡科网

js代码调试阶段

爬虫代码编写

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