js逆向--知乎（”人均月入过万“平台）参数x-zse-96逆向分析
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抓包分析与加密定位
打开目标网站，在搜索框内输入关键字进行抓包分析。
黄色所标注的，在它响应中存在一个xUDId的参数，这个参数被用作接口加密，至关重要，不过后期才能涉及到。
蓝色所标注的，在它的响应中包含了所有搜索结果，比如：文章的内容、评论数量、点赞数量、文章标题等。
发现只需要三个参数就能获取到数据（x-zse-96、x-zse-93、cookie），其中x-zse-93为固定值、cookie为身份认证信息，只有x-zse-96为动态变化。
搜索参数名字x-zse-96，发现只有一个文件，点进去之后再搜索x-zse-96，只有两个位置。此时分辨不出那个才是，两个都打上断点后刷新网页。
通过分析y所对应的值，正是x-zse-96所对应的参数，而且它是signature的值，所以我们可以认定：x-zse-96==signature。所以，我们只需要把图中的这段代码 u()(f()(s))搞明白，那么x-zse-96如何生成的问题便会迎刃而解。
分析参数s
101_3_2.0：固定版本号
/api/v4/search_v3?t=general&q=。。。。。。：请求后缀
"AMAcCTG-nBSPTl2Bx47qEFan8gnCuApj1ic=|1646896224"：前面说到的xUDId+时间戳
根据运行逻辑，我们先从代码的最内部进行分析。根据f()所指向的函数，我们可以看到它实现MD5加密的完整逻辑
此时，我们把 参数s传入m函数便可以得到加密结果。我们直接将m相关的代码区域全部扣下来。
我们已经完成了一半的解密过程。还差最后一个函数就可以完美收官：u()()
相比md5 这个函数而言，u 函数要难的多。进入u()函数。打上断点进行调试，发现返回的结果正是我们想要的。
老规矩把b函数所在的整个函数扣出来进行改写调用。
我们自写一个函数调用刚刚扣出来的两个函数。运行会提示atob is not defined 我们需要 把atbo库导入。安装atob库命令（npm install atob）
在使用node执行过程中，它会对环境进行检测，我们需要补充环境才能运行。
const {JSDOM} = require('jsdom');
const jsDomIntance = new JSDOM(`
`)
const window = jsDomIntance.window;完美运行得出x-zse-96参数结果。
完整代码：
const {JSDOM} = require('jsdom');
const jsDomIntance = new JSDOM(`
`)
const window = jsDomIntance.window;
var atob = require('atob')
function o(e, t) {
var n = (65535 & e) + (65535 & t);
return (e >> 16) + (t >> 16) + (n >> 16) << 16 | 65535 & n
}
function a(e, t, n, r, i, a) {
return o((c = o(o(t, e), o(r, a))) << (u = i) | c >>> 32 - u, n);
var c, u
}
function c(e, t, n, r, i, o, c) {
return a(t & n | ~t & r, e, t, i, o, c)
}
function u(e, t, n, r, i, o, c) {
return a(t & r | n & ~r, e, t, i, o, c)
}
function s(e, t, n, r, i, o, c) {
return a(t ^ n ^ r, e, t, i, o, c)
}
function l(e, t, n, r, i, o, c) {
return a(n ^ (t | ~r), e, t, i, o, c)
}
function d(e, t) {
var n, r, i, a, d;
e[t >> 5] |= 128 << t % 32,
e[14 + (t + 64 >>> 9 << 4)] = t;
var f = 1732584193
, p = -271733879
, h = -1732584194
, b = 271733878;
for (n = 0; n < e.length; n += 16)
r = f,
i = p,
a = h,
d = b,
f = c(f, p, h, b, e[n], 7, -680876936),
b = c(b, f, p, h, e[n + 1], 12, -389564586),
h = c(h, b, f, p, e[n + 2], 17, 606105819),
p = c(p, h, b, f, e[n + 3], 22, -1044525330),
f = c(f, p, h, b, e[n + 4], 7, -176418897),
b = c(b, f, p, h, e[n + 5], 12, 1200080426),
h = c(h, b, f, p, e[n + 6], 17, -1473231341),
p = c(p, h, b, f, e[n + 7], 22, -45705983),
f = c(f, p, h, b, e[n + 8], 7, 1770035416),
b = c(b, f, p, h, e[n + 9], 12, -1958414417),
h = c(h, b, f, p, e[n + 10], 17, -42063),
p = c(p, h, b, f, e[n + 11], 22, -1990404162),
f = c(f, p, h, b, e[n + 12], 7, 1804603682),
b = c(b, f, p, h, e[n + 13], 12, -40341101),
h = c(h, b, f, p, e[n + 14], 17, -1502002290),
f = u(f, p = c(p, h, b, f, e[n + 15], 22, 1236535329), h, b, e[n + 1], 5, -165796510),
b = u(b, f, p, h, e[n + 6], 9, -1069501632),
h = u(h, b, f, p, e[n + 11], 14, 643717713),
p = u(p, h, b, f, e[n], 20, -373897302),
f = u(f, p, h, b, e[n + 5], 5, -701558691),
b = u(b, f, p, h, e[n + 10], 9, 38016083),
h = u(h, b, f, p, e[n + 15], 14, -660478335),
p = u(p, h, b, f, e[n + 4], 20, -405537848),
f = u(f, p, h, b, e[n + 9], 5, 568446438),
b = u(b, f, p, h, e[n + 14], 9, -1019803690),
h = u(h, b, f, p, e[n + 3], 14, -187363961),
p = u(p, h, b, f, e[n + 8], 20, 1163531501),
f = u(f, p, h, b, e[n + 13], 5, -1444681467),
b = u(b, f, p, h, e[n + 2], 9, -51403784),
h = u(h, b, f, p, e[n + 7], 14, 1735328473),
f = s(f, p = u(p, h, b, f, e[n + 12], 20, -1926607734), h, b, e[n + 5], 4, -378558),
b = s(b, f, p, h, e[n + 8], 11, -2022574463),
h = s(h, b, f, p, e[n + 11], 16, 1839030562),
p = s(p, h, b, f, e[n + 14], 23, -35309556),
f = s(f, p, h, b, e[n + 1], 4, -1530992060),
b = s(b, f, p, h, e[n + 4], 11, 1272893353),
h = s(h, b, f, p, e[n + 7], 16, -155497632),
p = s(p, h, b, f, e[n + 10], 23, -1094730640),
f = s(f, p, h, b, e[n + 13], 4, 681279174),
b = s(b, f, p, h, e[n], 11, -358537222),
h = s(h, b, f, p, e[n + 3], 16, -722521979),
p = s(p, h, b, f, e[n + 6], 23, 76029189),
f = s(f, p, h, b, e[n + 9], 4, -640364487),
b = s(b, f, p, h, e[n + 12], 11, -421815835),
h = s(h, b, f, p, e[n + 15], 16, 530742520),
f = l(f, p = s(p, h, b, f, e[n + 2], 23, -995338651), h, b, e[n], 6, -198630844),
b = l(b, f, p, h, e[n + 7], 10, 1126891415),
h = l(h, b, f, p, e[n + 14], 15, -1416354905),
p = l(p, h, b, f, e[n + 5], 21, -57434055),
f = l(f, p, h, b, e[n + 12], 6, 1700485571),
b = l(b, f, p, h, e[n + 3], 10, -1894986606),
h = l(h, b, f, p, e[n + 10], 15, -1051523),
p = l(p, h, b, f, e[n + 1], 21, -2054922799),
f = l(f, p, h, b, e[n + 8], 6, 1873313359),
b = l(b, f, p, h, e[n + 15], 10, -30611744),
h = l(h, b, f, p, e[n + 6], 15, -1560198380),
p = l(p, h, b, f, e[n + 13], 21, 1309151649),
f = l(f, p, h, b, e[n + 4], 6, -145523070),
b = l(b, f, p, h, e[n + 11], 10, -1120210379),
h = l(h, b, f, p, e[n + 2], 15, 718787259),
p = l(p, h, b, f, e[n + 9], 21, -343485551),
f = o(f, r),
p = o(p, i),
h = o(h, a),
b = o(b, d);
return [f, p, h, b]
}
function f(e) {
var t, n = "", r = 32 * e.length;
for (t = 0; t < r; t += 8)
n += String.fromCharCode(e[t >> 5] >>> t % 32 & 255);
return n
}
function p(e) {
var t, n = [];
for (n[(e.length >> 2) - 1] = void 0,
t = 0; t < n.length; t += 1)
n[t] = 0;
var r = 8 * e.length;
for (t = 0; t < r; t += 8)
n[t >> 5] |= (255 & e.charCodeAt(t / 8)) << t % 32;
return n
}
function h(e) {
var t, n, r = "";
for (n = 0; n < e.length; n += 1)
t = e.charCodeAt(n),
r += "0123456789abcdef".charAt(t >>> 4 & 15) + "0123456789abcdef".charAt(15 & t);
return r
}
function b(e) {
return unescape(encodeURIComponent(e))
}
function v(e) {
return function(e) {
return f(d(p(e), 8 * e.length))
}(b(e))
}
function g(e, t) {
return function(e, t) {
var n, r, i = p(e), o = [], a = [];
for (o[15] = a[15] = void 0,
i.length > 16 && (i = d(i, 8 * e.length)),
n = 0; n < 16; n += 1)
o[n] = 909522486 ^ i[n],
a[n] = 1549556828 ^ i[n];
return r = d(o.concat(p(t)), 512 + 8 * t.length),
f(d(a.concat(r), 640))
}(b(e), b(t))
}
function O(e, t, n) {
return t ? n ? g(t, e) : h(g(t, e)) : n ? v(e) : h(v(e))
}
(function e() {
"use strict";
function t(e) {
return (t = "function" == typeof Symbol && "symbol" == typeof Symbol.A ? function (e) {
return typeof e
}
: function (e) {
return e && "function" == typeof Symbol && e.constructor === Symbol && e !== Symbol.prototype ? "symbol" : typeof e
}
)(e)
}
var A = "2.0"
, __g = {};
function s() {
}
function i(e) {
this.t = (2048 & e) >> 11,
this.s = (1536 & e) >> 9,
this.i = 511 & e,
this.h = 511 & e
}
function h(e) {
this.s = (3072 & e) >> 10,
this.h = 1023 & e
}
function a(e) {
this.a = (3072 & e) >> 10,
this.c = (768 & e) >> 8,
this.n = (192 & e) >> 6,
this.t = 63 & e
}
function c(e) {
this.s = e >> 10 & 3,
this.i = 1023 & e
}
function n() {
}
function e(e) {
this.a = (3072 & e) >> 10,
this.c = (768 & e) >> 8,
this.n = (192 & e) >> 6,
this.t = 63 & e
}
function o(e) {
this.h = (4095 & e) >> 2,
this.t = 3 & e
}
function r(e) {
this.s = e >> 10 & 3,
this.i = e >> 2 & 255,
this.t = 3 & e
}
s.prototype.e = function (e) {
e.o = !1
}
,
i.prototype.e = function (e) {
switch (this.t) {
case 0:
e.r[this.s] = this.i;
break;
case 1:
e.r[this.s] = e.k[this.h]
}
}
,
h.prototype.e = function (e) {
e.k[this.h] = e.r[this.s]
}
,
a.prototype.e = function (e) {
switch (this.t) {
case 0:
e.r[this.a] = e.r[this.c] + e.r[this.n];
break;
case 1:
e.r[this.a] = e.r[this.c] - e.r[this.n];
break;
case 2:
e.r[this.a] = e.r[this.c] * e.r[this.n];
break;
case 3:
e.r[this.a] = e.r[this.c] / e.r[this.n];
break;
case 4:
e.r[this.a] = e.r[this.c] % e.r[this.n];
break;
case 5:
e.r[this.a] = e.r[this.c] == e.r[this.n];
break;
case 6:
e.r[this.a] = e.r[this.c] >= e.r[this.n];
break;
case 7:
e.r[this.a] = e.r[this.c] || e.r[this.n];
break;
case 8:
e.r[this.a] = e.r[this.c] && e.r[this.n];
break;
case 9:
e.r[this.a] = e.r[this.c] !== e.r[this.n];
break;
case 10:
e.r[this.a] = t(e.r[this.c]);
break;
case 11:
e.r[this.a] = e.r[this.c] in e.r[this.n];
break;
case 12:
e.r[this.a] = e.r[this.c] > e.r[this.n];
break;
case 13:
e.r[this.a] = -e.r[this.c];
break;
case 14:
e.r[this.a] = e.r[this.c] < e.r[this.n];
break;
case 15:
e.r[this.a] = e.r[this.c] & e.r[this.n];
break;
case 16:
e.r[this.a] = e.r[this.c] ^ e.r[this.n];
break;
case 17:
e.r[this.a] = e.r[this.c] << e.r[this.n];
break;
case 18:
e.r[this.a] = e.r[this.c] >>> e.r[this.n];
break;
case 19:
e.r[this.a] = e.r[this.c] | e.r[this.n];
break;
case 20:
e.r[this.a] = !e.r[this.c]
}
}
,
c.prototype.e = function (e) {
e.Q.push(e.C),
e.B.push(e.k),
e.C = e.r[this.s],
e.k = [];
for (var t = 0; t < this.i; t++)
e.k.unshift(e.f.pop());
e.g.push(e.f),
e.f = []
}
,
n.prototype.e = function (e) {
e.C = e.Q.pop(),
e.k = e.B.pop(),
e.f = e.g.pop()
}
,
e.prototype.e = function (e) {
switch (this.t) {
case 0:
e.u = e.r[this.a] >= e.r[this.c];
break;
case 1:
e.u = e.r[this.a] <= e.r[this.c];
break;
case 2:
e.u = e.r[this.a] > e.r[this.c];
break;
case 3:
e.u = e.r[this.a] < e.r[this.c];
break;
case 4:
e.u = e.r[this.a] == e.r[this.c];
break;
case 5:
e.u = e.r[this.a] != e.r[this.c];
break;
case 6:
e.u = e.r[this.a];
break;
case 7:
e.u = !e.r[this.a]
}
}
,
o.prototype.e = function (e) {
switch (this.t) {
case 0:
e.C = this.h;
break;
case 1:
e.u && (e.C = this.h);
break;
case 2:
e.u || (e.C = this.h);
break;
case 3:
e.C = this.h,
e.w = null
}
e.u = !1
}
,
r.prototype.e = function (e) {
switch (this.t) {
case 0:
for (var t = [], n = 0; n < this.i; n++)
t.unshift(e.f.pop());
e.r[3] = e.r[this.s](t[0], t[1]);
break;
case 1:
for (var r = e.f.pop(), i = [], o = 0; o < this.i; o++)
i.unshift(e.f.pop());
e.r[3] = e.r[this.s][r](i[0], i[1]);
break;
case 2:
for (var a = [], c = 0; c < this.i; c++)
a.unshift(e.f.pop());
e.r[3] = new e.r[this.s](a[0], a[1])
}
}
;
var k = function (e) {
for (var t = 66, n = [], r = 0; r < e.length; r++) {
var i = 24 ^ e.charCodeAt(r) ^ t;
n.push(String.fromCharCode(i)),
t = i
}
return n.join("")
};
function Q(e) {
this.t = (4095 & e) >> 10,
this.s = (1023 & e) >> 8,
this.i = 1023 & e,
this.h = 63 & e
}
function C(e) {
this.t = (4095 & e) >> 10,
this.a = (1023 & e) >> 8,
this.c = (255 & e) >> 6
}
function B(e) {
this.s = (3072 & e) >> 10,
this.h = 1023 & e
}
function f(e) {
this.h = 4095 & e
}
function g(e) {
this.s = (3072 & e) >> 10
}
function u(e) {
this.h = 4095 & e
}
function w(e) {
this.t = (3840 & e) >> 8,
this.s = (192 & e) >> 6,
this.i = 63 & e
}
function G() {
this.r = [0, 0, 0, 0],
this.C = 0,
this.Q = [],
this.k = [],
this.B = [],
this.f = [],
this.g = [],
this.u = !1,
this.G = [],
this.b = [],
this.o = !1,
this.w = null,
this.U = null,
this.F = [],
this.R = 0,
this.J = {
0: s,
1: i,
2: h,
3: a,
4: c,
5: n,
6: e,
7: o,
8: r,
9: Q,
10: C,
11: B,
12: f,
13: g,
14: u,
15: w
}
}
Q.prototype.e = function (e) {
switch (this.t) {
case 0:
e.f.push(e.r[this.s]);
break;
case 1:
e.f.push(this.i);
break;
case 2:
e.f.push(e.k[this.h]);
break;
case 3:
e.f.push(k(e.b[this.h]))
}
}
,
C.prototype.e = function (A) {
switch (this.t) {
case 0:
var t = A.f.pop();
A.r[this.a] = A.r[this.c][t];
break;
case 1:
var s = A.f.pop()
, i = A.f.pop();
A.r[this.c][s] = i;
break;
case 2:
var h = A.f.pop();
A.r[this.a] = eval(h)
}
}
,
B.prototype.e = function (e) {
e.r[this.s] = k(e.b[this.h])
}
,
f.prototype.e = function (e) {
e.w = this.h
}
,
g.prototype.e = function (e) {
throw e.r[this.s]
}
,
u.prototype.e = function (e) {
var t = this
, n = [0];
e.k.forEach((function (e) {
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}
));
var r = function (r) {
var i = new G;
return i.k = n,
i.k[0] = r,
i.v(e.G, t.h, e.b, e.F),
i.r[3]
};
r.toString = function () {
return "() { [native code] }"
}
,
e.r[3] = r
}
,
w.prototype.e = function (e) {
switch (this.t) {
case 0:
for (var t = {}, n = 0; n < this.i; n++) {
var r = e.f.pop();
t[e.f.pop()] = r
}
e.r[this.s] = t;
break;
case 1:
for (var i = [], o = 0; o < this.i; o++)
i.unshift(e.f.pop());
e.r[this.s] = i
}
}
,
G.prototype.D = function (e) {
for (var t = atob(e), n = t.charCodeAt(0) << 8 | t.charCodeAt(1), r = [], i = 2; i < n + 2; i += 2)
r.push(t.charCodeAt(i) << 8 | t.charCodeAt(i + 1));
this.G = r;
for (var o = [], a = n + 2; a < t.length;) {
var c = t.charCodeAt(a) << 8 | t.charCodeAt(a + 1)
, u = t.slice(a + 2, a + 2 + c);
o.push(u),
a += c + 2
}
this.b = o
}
,
G.prototype.v = function (e, t, n) {
for (t = t || 0,
n = n || [],
this.C = t,
"string" == typeof e ? this.D(e) : (this.G = e,
this.b = n),
this.o = !0,
this.R = Date.now(); this.o;) {
var r = this.G[this.C++];
if ("number" != typeof r)
break;
var i = Date.now();
if (500 < i - this.R)
return;
this.R = i;
try {
this.e(r)
} catch (e) {
this.U = e,
this.w && (this.C = this.w)
}
}
}
,
G.prototype.e = function (e) {
var t = (61440 & e) >> 12;
new this.J[t](e).e(this)
}
,
"undefined" != typeof window && (new G).v("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");
var b = function (e) {
return __g._encrypt(encodeURIComponent(e))
};
window.window_b = b;
})(window)
function get_sig(s) {
return "2.0_" + window.window_b(O(s))
}
console.log(get_sig('101_3_2.0+/api/v4/search_v3?t=general&q=python&correction=1&offset=0&limit=20&filter_fields=&lc_idx=0&show_all_topics=0&search_hash_id=7d42c650dbbc7e2eb2786334c4b6fd1b&search_source=Normal&vertical_info=0,1,1,0,0,0,0,0,0,1+"AMAcCTG-nBSPTl2Bx47qEFan8gnCuApj1ic=|1646981860"'))最终结果：
各位大佬觉得本文写的不错的话，可以一键四连哦。