声明
此次案例只为学习交流使用，抓包内容、敏感网址、数据接口均已做脱敏处理，切勿用于其他非法用途；
文章目录
- 声明
- 前言
- 一、任务说明
- 二、网站分析
- 三、XHR断点调试，扣JS加密代码
- 四、代码实现
- 1、JS加密代码：encode.js
- 2、execjs模块调用JS代码
- 3、更多请关注公众号【程序员 小洲】
- 五、Pip模块安装
- 注意
前言
目标网站地址：aHR0cHM6Ly9tdXNpYy4xNjMuY29tLw==
提示：以下是本篇文章正文内容，下面案例可供参考
一、任务说明
1、输入歌手名，歌曲名等关键词，可以检索相关的信息；
2、输入该平台的歌曲ID，即可完成歌曲的下载；
最终结果
二、网站分析
实现思路
- 1、通过关键词检索，拿到歌曲信息；
- 2、通过歌曲ID请求某接口，拿到歌曲的.m4a链接；
- 3、通过歌曲的.m4a链接进行歌曲下载；
1、打开网站，首页搜索框输入关键词，按回车键，可以发现这个XHR响应接口；
关键词检索歌曲信息接口url：aHR0cHM6Ly9tdXNpYy4xNjMuY29tL3dlYXBpL2Nsb3Vkc2VhcmNoL2dldC93ZWI/Y3NyZl90b2tlbj0=
分析请求参数，这是使用RSA、AES混合加密的字符串，具体的加密代码我会放在后面；
加密的明文数据为下列的字符串，只需更换关键词(“青花瓷”)调用JS代码进行加密即可：
'{"hlpretag":"<span class=\"s-fc7\">","hlposttag":"</span>","s":"青花瓷","type":"1","offset":"0","total":"true","limit":"30","csrf_token":""}'
调用JS加密实现，以及模拟发包
2、根据歌曲ID请求接口，拿到歌曲的.m4a链接，点击任意一首歌曲播放，会使用歌曲ID请求接口；
通过歌曲ID请求接口url：aHR0cHM6Ly9tdXNpYy4xNjMuY29tL3dlYXBpL3NvbmcvZW5oYW5jZS9wbGF5ZXIvdXJsL3YxP2NzcmZfdG9rZW49
加密的明文数据为下列的字符串，只需更换歌曲ID(1978112718)调用JS代码进行加密即可：
{"ids": [1978112718],"level":"standard","encodeType":"aac","csrf_token":""}
调用JS加密实现，以及模拟发包
3、拿到歌曲的.m4a链接打开就可以直接播放啦
三、XHR断点调试，扣JS加密代码
逆向思路
- 1、通过浏览器，资源面板，添加XHR断点，让其在浏览器请求之前断住，以便我们分析请求参数；
- 2、通过资源面板下的调用堆栈，进行跟值，找到加密代码处；
- 3、通过Notepad++工具，格式化JS代码，方便我们扣取自己想要的JS代码；
- 4、通过浏览器等工具运行/调试JS代码；
- 5、通过python代码调用JS代码实现整个任务；
1、根据接口的url，下XHR断点，这里以关键词检索歌曲信息接口为例；
如果浏览器向该接口发送请求则会在发包前进行断点；
2、在首页输入关键词搜索即可触发，可以发现此处的代码参数已经生成，需要通过调用堆栈进行跟值，找到加密代码处，一个一个往下跟，正常流程是每从堆栈切换至一个新的函数，得取消之前的断点，在新函数处重新下断点，刷新操作；
通过调用堆栈跟值来到此处明文加密函数，在window.asrsea()重新下断点；
取消XHR断点，刷新操作，进入window.asrsea()函数，可以看见window.asrsea()是由d()函数赋值的
3、ctrl+A，全选代码复制，打开Notepad++新建文件，粘贴至文件中；
代码格式化：语言/J/JavaScript，代码折叠：视图/折叠所有层次，ctrl+F全局搜索：window.asrsea = d；
开始扣JS代码，代码需要扣全
4、通过浏览器等工具，自定义一些方法以便我们运行/调试JS代码；
四、代码实现
1、JS加密代码：encode.js
var CryptoJS = CryptoJS || function(u, p) {
var d = {}
, l = d.lib = {}
, s = function() {}
, t = l.Base = {
extend: function(a) {
s.prototype = this;
var c = new s;
a && c.mixIn(a);
c.hasOwnProperty("init") || (c.init = function() {
c.$super.init.apply(this, arguments)
}
);
c.init.prototype = c;
c.$super = this;
return c
},
create: function() {
var a = this.extend();
a.init.apply(a, arguments);
return a
},
init: function() {},
mixIn: function(a) {
for (var c in a)
a.hasOwnProperty(c) && (this[c] = a[c]);
a.hasOwnProperty("toString") && (this.toString = a.toString)
},
clone: function() {
return this.init.prototype.extend(this)
}
}
, r = l.WordArray = t.extend({
init: function(a, c) {
a = this.words = a || [];
this.sigBytes = c != p ? c : 4 * a.length
},
toString: function(a) {
return (a || v).stringify(this)
},
concat: function(a) {
var c = this.words
, e = a.words
, j = this.sigBytes;
a = a.sigBytes;
this.clamp();
if (j % 4)
for (var k = 0; k < a; k++)
c[j + k >>> 2] |= (e[k >>> 2] >>> 24 - 8 * (k % 4) & 255) << 24 - 8 * ((j + k) % 4);
else if (65535 < e.length)
for (k = 0; k < a; k += 4)
c[j + k >>> 2] = e[k >>> 2];
else
c.push.apply(c, e);
this.sigBytes += a;
return this
},
clamp: function() {
var a = this.words
, c = this.sigBytes;
a[c >>> 2] &= 4294967295 << 32 - 8 * (c % 4);
a.length = u.ceil(c / 4)
},
clone: function() {
var a = t.clone.call(this);
a.words = this.words.slice(0);
return a
},
random: function(a) {
for (var c = [], e = 0; e < a; e += 4)
c.push(4294967296 * u.random() | 0);
return new r.init(c,a)
}
})
, w = d.enc = {}
, v = w.Hex = {
stringify: function(a) {
var c = a.words;
a = a.sigBytes;
for (var e = [], j = 0; j < a; j++) {
var k = c[j >>> 2] >>> 24 - 8 * (j % 4) & 255;
e.push((k >>> 4).toString(16));
e.push((k & 15).toString(16))
}
return e.join("")
},
parse: function(a) {
for (var c = a.length, e = [], j = 0; j < c; j += 2)
e[j >>> 3] |= parseInt(a.substr(j, 2), 16) << 24 - 4 * (j % 8);
return new r.init(e,c / 2)
}
}
, b = w.Latin1 = {
stringify: function(a) {
var c = a.words;
a = a.sigBytes;
for (var e = [], j = 0; j < a; j++)
e.push(String.fromCharCode(c[j >>> 2] >>> 24 - 8 * (j % 4) & 255));
return e.join("")
},
parse: function(a) {
for (var c = a.length, e = [], j = 0; j < c; j++)
e[j >>> 2] |= (a.charCodeAt(j) & 255) << 24 - 8 * (j % 4);
return new r.init(e,c)
}
}
, x = w.Utf8 = {
stringify: function(a) {
try {
return decodeURIComponent(escape(b.stringify(a)))
} catch (c) {
throw Error("Malformed UTF-8 data")
}
},
parse: function(a) {
return b.parse(unescape(encodeURIComponent(a)))
}
}
, q = l.BufferedBlockAlgorithm = t.extend({
reset: function() {
this.i3x = new r.init;
this.yE1x = 0
},
Ap1x: function(a) {
"string" == typeof a && (a = x.parse(a));
this.i3x.concat(a);
this.yE1x += a.sigBytes
},
mD7w: function(a) {
var c = this.i3x
, e = c.words
, j = c.sigBytes
, k = this.blockSize
, b = j / (4 * k)
, b = a ? u.ceil(b) : u.max((b | 0) - this.UZ9Q, 0);
a = b * k;
j = u.min(4 * a, j);
if (a) {
for (var q = 0; q < a; q += k)
this.tt9k(e, q);
q = e.splice(0, a);
c.sigBytes -= j
}
return new r.init(q,j)
},
clone: function() {
var a = t.clone.call(this);
a.i3x = this.i3x.clone();
return a
},
UZ9Q: 0
});
l.Hasher = q.extend({
cfg: t.extend(),
init: function(a) {
this.cfg = this.cfg.extend(a);
this.reset()
},
reset: function() {
q.reset.call(this);
this.mk7d()
},
update: function(a) {
this.Ap1x(a);
this.mD7w();
return this
},
finalize: function(a) {
a && this.Ap1x(a);
return this.nZ7S()
},
blockSize: 16,
mO7H: function(a) {
return function(b, e) {
return (new a.init(e)).finalize(b)
}
},
yD1x: function(a) {
return function(b, e) {
return (new n.HMAC.init(a,e)).finalize(b)
}
}
});
var n = d.algo = {};
return d
}(Math);
(function() {
var u = CryptoJS
, p = u.lib.WordArray;
u.enc.Base64 = {
stringify: function(d) {
var l = d.words
, p = d.sigBytes
, t = this.bD3x;
d.clamp();
d = [];
for (var r = 0; r < p; r += 3)
for (var w = (l[r >>> 2] >>> 24 - 8 * (r % 4) & 255) << 16 | (l[r + 1 >>> 2] >>> 24 - 8 * ((r + 1) % 4) & 255) << 8 | l[r + 2 >>> 2] >>> 24 - 8 * ((r + 2) % 4) & 255, v = 0; 4 > v && r + .75 * v < p; v++)
d.push(t.charAt(w >>> 6 * (3 - v) & 63));
if (l = t.charAt(64))
for (; d.length % 4; )
d.push(l);
return d.join("")
},
parse: function(d) {
var l = d.length
, s = this.bD3x
, t = s.charAt(64);
t && (t = d.indexOf(t),
-1 != t && (l = t));
for (var t = [], r = 0, w = 0; w < l; w++)
if (w % 4) {
var v = s.indexOf(d.charAt(w - 1)) << 2 * (w % 4)
, b = s.indexOf(d.charAt(w)) >>> 6 - 2 * (w % 4);
t[r >>> 2] |= (v | b) << 24 - 8 * (r % 4);
r++
}
return p.create(t, r)
},
bD3x: "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/="
}
}
)();
(function(u) {
function p(b, n, a, c, e, j, k) {
b = b + (n & a | ~n & c) + e + k;
return (b << j | b >>> 32 - j) + n
}
function d(b, n, a, c, e, j, k) {
b = b + (n & c | a & ~c) + e + k;
return (b << j | b >>> 32 - j) + n
}
function l(b, n, a, c, e, j, k) {
b = b + (n ^ a ^ c) + e + k;
return (b << j | b >>> 32 - j) + n
}
function s(b, n, a, c, e, j, k) {
b = b + (a ^ (n | ~c)) + e + k;
return (b << j | b >>> 32 - j) + n
}
for (var t = CryptoJS, r = t.lib, w = r.WordArray, v = r.Hasher, r = t.algo, b = [], x = 0; 64 > x; x++)
b[x] = 4294967296 * u.abs(u.sin(x + 1)) | 0;
r = r.MD5 = v.extend({
mk7d: function() {
this.cT4X = new w.init([1732584193, 4023233417, 2562383102, 271733878])
},
tt9k: function(q, n) {
for (var a = 0; 16 > a; a++) {
var c = n + a
, e = q[c];
q[c] = (e << 8 | e >>> 24) & 16711935 | (e << 24 | e >>> 8) & 4278255360
}
var a = this.cT4X.words
, c = q[n + 0]
, e = q[n + 1]
, j = q[n + 2]
, k = q[n + 3]
, z = q[n + 4]
, r = q[n + 5]
, t = q[n + 6]
, w = q[n + 7]
, v = q[n + 8]
, A = q[n + 9]
, B = q[n + 10]
, C = q[n + 11]
, u = q[n + 12]
, D = q[n + 13]
, E = q[n + 14]
, x = q[n + 15]
, f = a[0]
, m = a[1]
, g = a[2]
, h = a[3]
, f = p(f, m, g, h, c, 7, b[0])
, h = p(h, f, m, g, e, 12, b[1])
, g = p(g, h, f, m, j, 17, b[2])
, m = p(m, g, h, f, k, 22, b[3])
, f = p(f, m, g, h, z, 7, b[4])
, h = p(h, f, m, g, r, 12, b[5])
, g = p(g, h, f, m, t, 17, b[6])
, m = p(m, g, h, f, w, 22, b[7])
, f = p(f, m, g, h, v, 7, b[8])
, h = p(h, f, m, g, A, 12, b[9])
, g = p(g, h, f, m, B, 17, b[10])
, m = p(m, g, h, f, C, 22, b[11])
, f = p(f, m, g, h, u, 7, b[12])
, h = p(h, f, m, g, D, 12, b[13])
, g = p(g, h, f, m, E, 17, b[14])
, m = p(m, g, h, f, x, 22, b[15])
, f = d(f, m, g, h, e, 5, b[16])
, h = d(h, f, m, g, t, 9, b[17])
, g = d(g, h, f, m, C, 14, b[18])
, m = d(m, g, h, f, c, 20, b[19])
, f = d(f, m, g, h, r, 5, b[20])
, h = d(h, f, m, g, B, 9, b[21])
, g = d(g, h, f, m, x, 14, b[22])
, m = d(m, g, h, f, z, 20, b[23])
, f = d(f, m, g, h, A, 5, b[24])
, h = d(h, f, m, g, E, 9, b[25])
, g = d(g, h, f, m, k, 14, b[26])
, m = d(m, g, h, f, v, 20, b[27])
, f = d(f, m, g, h, D, 5, b[28])
, h = d(h, f, m, g, j, 9, b[29])
, g = d(g, h, f, m, w, 14, b[30])
, m = d(m, g, h, f, u, 20, b[31])
, f = l(f, m, g, h, r, 4, b[32])
, h = l(h, f, m, g, v, 11, b[33])
, g = l(g, h, f, m, C, 16, b[34])
, m = l(m, g, h, f, E, 23, b[35])
, f = l(f, m, g, h, e, 4, b[36])
, h = l(h, f, m, g, z, 11, b[37])
, g = l(g, h, f, m, w, 16, b[38])
, m = l(m, g, h, f, B, 23, b[39])
, f = l(f, m, g, h, D, 4, b[40])
, h = l(h, f, m, g, c, 11, b[41])
, g = l(g, h, f, m, k, 16, b[42])
, m = l(m, g, h, f, t, 23, b[43])
, f = l(f, m, g, h, A, 4, b[44])
, h = l(h, f, m, g, u, 11, b[45])
, g = l(g, h, f, m, x, 16, b[46])
, m = l(m, g, h, f, j, 23, b[47])
, f = s(f, m, g, h, c, 6, b[48])
, h = s(h, f, m, g, w, 10, b[49])
, g = s(g, h, f, m, E, 15, b[50])
, m = s(m, g, h, f, r, 21, b[51])
, f = s(f, m, g, h, u, 6, b[52])
, h = s(h, f, m, g, k, 10, b[53])
, g = s(g, h, f, m, B, 15, b[54])
, m = s(m, g, h, f, e, 21, b[55])
, f = s(f, m, g, h, v, 6, b[56])
, h = s(h, f, m, g, x, 10, b[57])
, g = s(g, h, f, m, t, 15, b[58])
, m = s(m, g, h, f, D, 21, b[59])
, f = s(f, m, g, h, z, 6, b[60])
, h = s(h, f, m, g, C, 10, b[61])
, g = s(g, h, f, m, j, 15, b[62])
, m = s(m, g, h, f, A, 21, b[63]);
a[0] = a[0] + f | 0;
a[1] = a[1] + m | 0;
a[2] = a[2] + g | 0;
a[3] = a[3] + h | 0
},
nZ7S: function() {
var b = this.i3x
, n = b.words
, a = 8 * this.yE1x
, c = 8 * b.sigBytes;
n[c >>> 5] |= 128 << 24 - c % 32;
var e = u.floor(a / 4294967296);
n[(c + 64 >>> 9 << 4) + 15] = (e << 8 | e >>> 24) & 16711935 | (e << 24 | e >>> 8) & 4278255360;
n[(c + 64 >>> 9 << 4) + 14] = (a << 8 | a >>> 24) & 16711935 | (a << 24 | a >>> 8) & 4278255360;
b.sigBytes = 4 * (n.length + 1);
this.mD7w();
b = this.cT4X;
n = b.words;
for (a = 0; 4 > a; a++)
c = n[a],
n[a] = (c << 8 | c >>> 24) & 16711935 | (c << 24 | c >>> 8) & 4278255360;
return b
},
clone: function() {
var b = v.clone.call(this);
b.cT4X = this.cT4X.clone();
return b
}
});
t.MD5 = v.mO7H(r);
t.HmacMD5 = v.yD1x(r)
}
)(Math);
(function() {
var u = CryptoJS
, p = u.lib
, d = p.Base
, l = p.WordArray
, p = u.algo
, s = p.EvpKDF = d.extend({
cfg: d.extend({
keySize: 4,
hasher: p.MD5,
iterations: 1
}),
init: function(d) {
this.cfg = this.cfg.extend(d)
},
compute: function(d, r) {
for (var p = this.cfg, s = p.hasher.create(), b = l.create(), u = b.words, q = p.keySize, p = p.iterations; u.length < q; ) {
n && s.update(n);
var n = s.update(d).finalize(r);
s.reset();
for (var a = 1; a < p; a++)
n = s.finalize(n),
s.reset();
b.concat(n)
}
b.sigBytes = 4 * q;
return b
}
});
u.EvpKDF = function(d, l, p) {
return s.create(p).compute(d, l)
}
}
)();
CryptoJS.lib.Cipher || function(u) {
var p = CryptoJS
, d = p.lib
, l = d.Base
, s = d.WordArray
, t = d.BufferedBlockAlgorithm
, r = p.enc.Base64
, w = p.algo.EvpKDF
, v = d.Cipher = t.extend({
cfg: l.extend(),
createEncryptor: function(e, a) {
return this.create(this.If5k, e, a)
},
createDecryptor: function(e, a) {
return this.create(this.brx7q, e, a)
},
init: function(e, a, b) {
this.cfg = this.cfg.extend(b);
this.UA9r = e;
this.J3x = a;
this.reset()
},
reset: function() {
t.reset.call(this);
this.mk7d()
},
process: function(e) {
this.Ap1x(e);
return this.mD7w()
},
finalize: function(e) {
e && this.Ap1x(e);
return this.nZ7S()
},
keySize: 4,
ivSize: 4,
If5k: 1,
brx7q: 2,
mO7H: function(e) {
return {
encrypt: function(b, k, d) {
return ("string" == typeof k ? c : a).encrypt(e, b, k, d)
},
decrypt: function(b, k, d) {
return ("string" == typeof k ? c : a).decrypt(e, b, k, d)
}
}
}
});
d.StreamCipher = v.extend({
nZ7S: function() {
return this.mD7w(!0)
},
blockSize: 1
});
var b = p.mode = {}
, x = function(e, a, b) {
var c = this.tC9t;
c ? this.tC9t = u : c = this.DV2x;
for (var d = 0; d < b; d++)
e[a + d] ^= c[d]
}
, q = (d.BlockCipherMode = l.extend({
createEncryptor: function(e, a) {
return this.Encryptor.create(e, a)
},
createDecryptor: function(e, a) {
return this.Decryptor.create(e, a)
},
init: function(e, a) {
this.ua9R = e;
this.tC9t = a
}
})).extend();
q.Encryptor = q.extend({
processBlock: function(e, a) {
var b = this.ua9R
, c = b.blockSize;
x.call(this, e, a, c);
b.encryptBlock(e, a);
this.DV2x = e.slice(a, a + c)
}
});
q.Decryptor = q.extend({
processBlock: function(e, a) {
var b = this.ua9R
, c = b.blockSize
, d = e.slice(a, a + c);
b.decryptBlock(e, a);
x.call(this, e, a, c);
this.DV2x = d
}
});
b = b.CBC = q;
q = (p.pad = {}).Pkcs7 = {
pad: function(a, b) {
for (var c = 4 * b, c = c - a.sigBytes % c, d = c << 24 | c << 16 | c << 8 | c, l = [], n = 0; n < c; n += 4)
l.push(d);
c = s.create(l, c);
a.concat(c)
},
unpad: function(a) {
a.sigBytes -= a.words[a.sigBytes - 1 >>> 2] & 255
}
};
d.BlockCipher = v.extend({
cfg: v.cfg.extend({
mode: b,
padding: q
}),
reset: function() {
v.reset.call(this);
var a = this.cfg
, b = a.iv
, a = a.mode;
if (this.UA9r == this.If5k)
var c = a.createEncryptor;
else
c = a.createDecryptor,
this.UZ9Q = 1;
this.eR5W = c.call(a, this, b && b.words)
},
tt9k: function(a, b) {
this.eR5W.processBlock(a, b)
},
nZ7S: function() {
var a = this.cfg.padding;
if (this.UA9r == this.If5k) {
a.pad(this.i3x, this.blockSize);
var b = this.mD7w(!0)
} else
b = this.mD7w(!0),
a.unpad(b);
return b
},
blockSize: 4
});
var n = d.CipherParams = l.extend({
init: function(a) {
this.mixIn(a)
},
toString: function(a) {
return (a || this.formatter).stringify(this)
}
})
, b = (p.format = {}).OpenSSL = {
stringify: function(a) {
var b = a.ciphertext;
a = a.salt;
return (a ? s.create([1398893684, 1701076831]).concat(a).concat(b) : b).toString(r)
},
parse: function(a) {
a = r.parse(a);
var b = a.words;
if (1398893684 == b[0] && 1701076831 == b[1]) {
var c = s.create(b.slice(2, 4));
b.splice(0, 4);
a.sigBytes -= 16
}
return n.create({
ciphertext: a,
salt: c
})
}
}
, a = d.SerializableCipher = l.extend({
cfg: l.extend({
format: b
}),
encrypt: function(a, b, c, d) {
d = this.cfg.extend(d);
var l = a.createEncryptor(c, d);
b = l.finalize(b);
l = l.cfg;
return n.create({
ciphertext: b,
key: c,
iv: l.iv,
algorithm: a,
mode: l.mode,
padding: l.padding,
blockSize: a.blockSize,
formatter: d.format
})
},
decrypt: function(a, b, c, d) {
d = this.cfg.extend(d);
b = this.HX5c(b, d.format);
return a.createDecryptor(c, d).finalize(b.ciphertext)
},
HX5c: function(a, b) {
return "string" == typeof a ? b.parse(a, this) : a
}
})
, p = (p.kdf = {}).OpenSSL = {
execute: function(a, b, c, d) {
d || (d = s.random(8));
a = w.create({
keySize: b + c
}).compute(a, d);
c = s.create(a.words.slice(b), 4 * c);
a.sigBytes = 4 * b;
return n.create({
key: a,
iv: c,
salt: d
})
}
}
, c = d.PasswordBasedCipher = a.extend({
cfg: a.cfg.extend({
kdf: p
}),
encrypt: function(b, c, d, l) {
l = this.cfg.extend(l);
d = l.kdf.execute(d, b.keySize, b.ivSize);
l.iv = d.iv;
b = a.encrypt.call(this, b, c, d.key, l);
b.mixIn(d);
return b
},
decrypt: function(b, c, d, l) {
l = this.cfg.extend(l);
c = this.HX5c(c, l.format);
d = l.kdf.execute(d, b.keySize, b.ivSize, c.salt);
l.iv = d.iv;
return a.decrypt.call(this, b, c, d.key, l)
}
})
}();
(function() {
for (var u = CryptoJS, p = u.lib.BlockCipher, d = u.algo, l = [], s = [], t = [], r = [], w = [], v = [], b = [], x = [], q = [], n = [], a = [], c = 0; 256 > c; c++)
a[c] = 128 > c ? c << 1 : c << 1 ^ 283;
for (var e = 0, j = 0, c = 0; 256 > c; c++) {
var k = j ^ j << 1 ^ j << 2 ^ j << 3 ^ j << 4
, k = k >>> 8 ^ k & 255 ^ 99;
l[e] = k;
s[k] = e;
var z = a[e]
, F = a[z]
, G = a[F]
, y = 257 * a[k] ^ 16843008 * k;
t[e] = y << 24 | y >>> 8;
r[e] = y << 16 | y >>> 16;
w[e] = y << 8 | y >>> 24;
v[e] = y;
y = 16843009 * G ^ 65537 * F ^ 257 * z ^ 16843008 * e;
b[k] = y << 24 | y >>> 8;
x[k] = y << 16 | y >>> 16;
q[k] = y << 8 | y >>> 24;
n[k] = y;
e ? (e = z ^ a[a[a[G ^ z]]],
j ^= a[a[j]]) : e = j = 1
}
var H = [0, 1, 2, 4, 8, 16, 32, 64, 128, 27, 54]
, d = d.AES = p.extend({
mk7d: function() {
for (var a = this.J3x, c = a.words, d = a.sigBytes / 4, a = 4 * ((this.bgi3x = d + 6) + 1), e = this.brW7P = [], j = 0; j < a; j++)
if (j < d)
e[j] = c[j];
else {
var k = e[j - 1];
j % d ? 6 < d && 4 == j % d && (k = l[k >>> 24] << 24 | l[k >>> 16 & 255] << 16 | l[k >>> 8 & 255] << 8 | l[k & 255]) : (k = k << 8 | k >>> 24,
k = l[k >>> 24] << 24 | l[k >>> 16 & 255] << 16 | l[k >>> 8 & 255] << 8 | l[k & 255],
k ^= H[j / d | 0] << 24);
e[j] = e[j - d] ^ k
}
c = this.bse7X = [];
for (d = 0; d < a; d++)
j = a - d,
k = d % 4 ? e[j] : e[j - 4],
c[d] = 4 > d || 4 >= j ? k : b[l[k >>> 24]] ^ x[l[k >>> 16 & 255]] ^ q[l[k >>> 8 & 255]] ^ n[l[k & 255]]
},
encryptBlock: function(a, b) {
this.DW2x(a, b, this.brW7P, t, r, w, v, l)
},
decryptBlock: function(a, c) {
var d = a[c + 1];
a[c + 1] = a[c + 3];
a[c + 3] = d;
this.DW2x(a, c, this.bse7X, b, x, q, n, s);
d = a[c + 1];
a[c + 1] = a[c + 3];
a[c + 3] = d
},
DW2x: function(a, b, c, d, e, j, l, f) {
for (var m = this.bgi3x, g = a[b] ^ c[0], h = a[b + 1] ^ c[1], k = a[b + 2] ^ c[2], n = a[b + 3] ^ c[3], p = 4, r = 1; r < m; r++)
var q = d[g >>> 24] ^ e[h >>> 16 & 255] ^ j[k >>> 8 & 255] ^ l[n & 255] ^ c[p++]
, s = d[h >>> 24] ^ e[k >>> 16 & 255] ^ j[n >>> 8 & 255] ^ l[g & 255] ^ c[p++]
, t = d[k >>> 24] ^ e[n >>> 16 & 255] ^ j[g >>> 8 & 255] ^ l[h & 255] ^ c[p++]
, n = d[n >>> 24] ^ e[g >>> 16 & 255] ^ j[h >>> 8 & 255] ^ l[k & 255] ^ c[p++]
, g = q
, h = s
, k = t;
q = (f[g >>> 24] << 24 | f[h >>> 16 & 255] << 16 | f[k >>> 8 & 255] << 8 | f[n & 255]) ^ c[p++];
s = (f[h >>> 24] << 24 | f[k >>> 16 & 255] << 16 | f[n >>> 8 & 255] << 8 | f[g & 255]) ^ c[p++];
t = (f[k >>> 24] << 24 | f[n >>> 16 & 255] << 16 | f[g >>> 8 & 255] << 8 | f[h & 255]) ^ c[p++];
n = (f[n >>> 24] << 24 | f[g >>> 16 & 255] << 16 | f[h >>> 8 & 255] << 8 | f[k & 255]) ^ c[p++];
a[b] = q;
a[b + 1] = s;
a[b + 2] = t;
a[b + 3] = n
},
keySize: 8
});
u.AES = p.mO7H(d)
}
)();
function RSAKeyPair(a, b, c) {
this.e = biFromHex(a),
this.d = biFromHex(b),
this.m = biFromHex(c),
this.chunkSize = 2 * biHighIndex(this.m),
this.radix = 16,
this.barrett = new BarrettMu(this.m)
}
function twoDigit(a) {
return (10 > a ? "0" : "") + String(a)
}
function encryptedString(a, b) {
for (var f, g, h, i, j, k, l, c = new Array, d = b.length, e = 0; d > e; )
c[e] = b.charCodeAt(e),
e++;
for (; 0 != c.length % a.chunkSize; )
c[e++] = 0;
for (f = c.length,
g = "",
e = 0; f > e; e += a.chunkSize) {
for (j = new BigInt,
h = 0,
i = e; i < e + a.chunkSize; ++h)
j.digits[h] = c[i++],
j.digits[h] += c[i++] << 8;
k = a.barrett.powMod(j, a.e),
l = 16 == a.radix ? biToHex(k) : biToString(k, a.radix),
g += l + " "
}
return g.substring(0, g.length - 1)
}
function decryptedString(a, b) {
var e, f, g, h, c = b.split(" "), d = "";
for (e = 0; e < c.length; ++e)
for (h = 16 == a.radix ? biFromHex(c[e]) : biFromString(c[e], a.radix),
g = a.barrett.powMod(h, a.d),
f = 0; f <= biHighIndex(g); ++f)
d += String.fromCharCode(255 & g.digits[f], g.digits[f] >> 8);
return 0 == d.charCodeAt(d.length - 1) && (d = d.substring(0, d.length - 1)),
d
}
function setMaxDigits(a) {
maxDigits = a,
ZERO_ARRAY = new Array(maxDigits);
for (var b = 0; b < ZERO_ARRAY.length; b++)
ZERO_ARRAY[b] = 0;
bigZero = new BigInt,
bigOne = new BigInt,
bigOne.digits[0] = 1
}
function BigInt(a) {
this.digits = "boolean" == typeof a && 1 == a ? null : ZERO_ARRAY.slice(0),
this.isNeg = !1
}
function biFromDecimal(a) {
for (var d, e, f, b = "-" == a.charAt(0), c = b ? 1 : 0; c < a.length && "0" == a.charAt(c); )
++c;
if (c == a.length)
d = new BigInt;
else {
for (e = a.length - c,
f = e % dpl10,
0 == f && (f = dpl10),
d = biFromNumber(Number(a.substr(c, f))),
c += f; c < a.length; )
d = biAdd(biMultiply(d, lr10), biFromNumber(Number(a.substr(c, dpl10)))),
c += dpl10;
d.isNeg = b
}
return d
}
function biCopy(a) {
var b = new BigInt(!0);
return b.digits = a.digits.slice(0),
b.isNeg = a.isNeg,
b
}
function biFromNumber(a) {
var c, b = new BigInt;
for (b.isNeg = 0 > a,
a = Math.abs(a),
c = 0; a > 0; )
b.digits[c++] = a & maxDigitVal,
a >>= biRadixBits;
return b
}
function reverseStr(a) {
var c, b = "";
for (c = a.length - 1; c > -1; --c)
b += a.charAt(c);
return b
}
function biToString(a, b) {
var d, e, c = new BigInt;
for (c.digits[0] = b,
d = biDivideModulo(a, c),
e = hexatrigesimalToChar[d[1].digits[0]]; 1 == biCompare(d[0], bigZero); )
d = biDivideModulo(d[0], c),
digit = d[1].digits[0],
e += hexatrigesimalToChar[d[1].digits[0]];
return (a.isNeg ? "-" : "") + reverseStr(e)
}
function biToDecimal(a) {
var c, d, b = new BigInt;
for (b.digits[0] = 10,
c = biDivideModulo(a, b),
d = String(c[1].digits[0]); 1 == biCompare(c[0], bigZero); )
c = biDivideModulo(c[0], b),
d += String(c[1].digits[0]);
return (a.isNeg ? "-" : "") + reverseStr(d)
}
function digitToHex(a) {
var b = 15
, c = "";
for (i = 0; 4 > i; ++i)
c += hexToChar[a & b],
a >>>= 4;
return reverseStr(c)
}
function biToHex(a) {
var d, b = "";
for (biHighIndex(a),
d = biHighIndex(a); d > -1; --d)
b += digitToHex(a.digits[d]);
return b
}
function charToHex(a) {
var h, b = 48, c = b + 9, d = 97, e = d + 25, f = 65, g = 90;
return h = a >= b && c >= a ? a - b : a >= f && g >= a ? 10 + a - f : a >= d && e >= a ? 10 + a - d : 0
}
function hexToDigit(a) {
var d, b = 0, c = Math.min(a.length, 4);
for (d = 0; c > d; ++d)
b <<= 4,
b |= charToHex(a.charCodeAt(d));
return b
}
function biFromHex(a) {
var d, e, b = new BigInt, c = a.length;
for (d = c,
e = 0; d > 0; d -= 4,
++e)
b.digits[e] = hexToDigit(a.substr(Math.max(d - 4, 0), Math.min(d, 4)));
return b
}
function biFromString(a, b) {
var g, h, i, j, c = "-" == a.charAt(0), d = c ? 1 : 0, e = new BigInt, f = new BigInt;
for (f.digits[0] = 1,
g = a.length - 1; g >= d; g--)
h = a.charCodeAt(g),
i = charToHex(h),
j = biMultiplyDigit(f, i),
e = biAdd(e, j),
f = biMultiplyDigit(f, b);
return e.isNeg = c,
e
}
function biDump(a) {
return (a.isNeg ? "-" : "") + a.digits.join(" ")
}
function biAdd(a, b) {
var c, d, e, f;
if (a.isNeg != b.isNeg)
b.isNeg = !b.isNeg,
c = biSubtract(a, b),
b.isNeg = !b.isNeg;
else {
for (c = new BigInt,
d = 0,
f = 0; f < a.digits.length; ++f)
e = a.digits[f] + b.digits[f] + d,
c.digits[f] = 65535 & e,
d = Number(e >= biRadix);
c.isNeg = a.isNeg
}
return c
}
function biSubtract(a, b) {
var c, d, e, f;
if (a.isNeg != b.isNeg)
b.isNeg = !b.isNeg,
c = biAdd(a, b),
b.isNeg = !b.isNeg;
else {
for (c = new BigInt,
e = 0,
f = 0; f < a.digits.length; ++f)
d = a.digits[f] - b.digits[f] + e,
c.digits[f] = 65535 & d,
c.digits[f] < 0 && (c.digits[f] += biRadix),
e = 0 - Number(0 > d);
if (-1 == e) {
for (e = 0,
f = 0; f < a.digits.length; ++f)
d = 0 - c.digits[f] + e,
c.digits[f] = 65535 & d,
c.digits[f] < 0 && (c.digits[f] += biRadix),
e = 0 - Number(0 > d);
c.isNeg = !a.isNeg
} else
c.isNeg = a.isNeg
}
return c
}
function biHighIndex(a) {
for (var b = a.digits.length - 1; b > 0 && 0 == a.digits[b]; )
--b;
return b
}
function biNumBits(a) {
var e, b = biHighIndex(a), c = a.digits[b], d = (b + 1) * bitsPerDigit;
for (e = d; e > d - bitsPerDigit && 0 == (32768 & c); --e)
c <<= 1;
return e
}
function biMultiply(a, b) {
var d, h, i, k, c = new BigInt, e = biHighIndex(a), f = biHighIndex(b);
for (k = 0; f >= k; ++k) {
for (d = 0,
i = k,
j = 0; e >= j; ++j,
++i)
h = c.digits[i] + a.digits[j] * b.digits[k] + d,
c.digits[i] = h & maxDigitVal,
d = h >>> biRadixBits;
c.digits[k + e + 1] = d
}
return c.isNeg = a.isNeg != b.isNeg,
c
}
function biMultiplyDigit(a, b) {
var c, d, e, f;
for (result = new BigInt,
c = biHighIndex(a),
d = 0,
f = 0; c >= f; ++f)
e = result.digits[f] + a.digits[f] * b + d,
result.digits[f] = e & maxDigitVal,
d = e >>> biRadixBits;
return result.digits[1 + c] = d,
result
}
function arrayCopy(a, b, c, d, e) {
var g, h, f = Math.min(b + e, a.length);
for (g = b,
h = d; f > g; ++g,
++h)
c[h] = a[g]
}
function biShiftLeft(a, b) {
var e, f, g, h, c = Math.floor(b / bitsPerDigit), d = new BigInt;
for (arrayCopy(a.digits, 0, d.digits, c, d.digits.length - c),
e = b % bitsPerDigit,
f = bitsPerDigit - e,
g = d.digits.length - 1,
h = g - 1; g > 0; --g,
--h)
d.digits[g] = d.digits[g] << e & maxDigitVal | (d.digits[h] & highBitMasks[e]) >>> f;
return d.digits[0] = d.digits[g] << e & maxDigitVal,
d.isNeg = a.isNeg,
d
}
function biShiftRight(a, b) {
var e, f, g, h, c = Math.floor(b / bitsPerDigit), d = new BigInt;
for (arrayCopy(a.digits, c, d.digits, 0, a.digits.length - c),
e = b % bitsPerDigit,
f = bitsPerDigit - e,
g = 0,
h = g + 1; g < d.digits.length - 1; ++g,
++h)
d.digits[g] = d.digits[g] >>> e | (d.digits[h] & lowBitMasks[e]) << f;
return d.digits[d.digits.length - 1] >>>= e,
d.isNeg = a.isNeg,
d
}
function biMultiplyByRadixPower(a, b) {
var c = new BigInt;
return arrayCopy(a.digits, 0, c.digits, b, c.digits.length - b),
c
}
function biDivideByRadixPower(a, b) {
var c = new BigInt;
return arrayCopy(a.digits, b, c.digits, 0, c.digits.length - b),
c
}
function biModuloByRadixPower(a, b) {
var c = new BigInt;
return arrayCopy(a.digits, 0, c.digits, 0, b),
c
}
function biCompare(a, b) {
if (a.isNeg != b.isNeg)
return 1 - 2 * Number(a.isNeg);
for (var c = a.digits.length - 1; c >= 0; --c)
if (a.digits[c] != b.digits[c])
return a.isNeg ? 1 - 2 * Number(a.digits[c] > b.digits[c]) : 1 - 2 * Number(a.digits[c] < b.digits[c]);
return 0
}
function biDivideModulo(a, b) {
var f, g, h, i, j, k, l, m, n, o, p, q, r, s, c = biNumBits(a), d = biNumBits(b), e = b.isNeg;
if (d > c)
return a.isNeg ? (f = biCopy(bigOne),
f.isNeg = !b.isNeg,
a.isNeg = !1,
b.isNeg = !1,
g = biSubtract(b, a),
a.isNeg = !0,
b.isNeg = e) : (f = new BigInt,
g = biCopy(a)),
new Array(f,g);
for (f = new BigInt,
g = a,
h = Math.ceil(d / bitsPerDigit) - 1,
i = 0; b.digits[h] < biHalfRadix; )
b = biShiftLeft(b, 1),
++i,
++d,
h = Math.ceil(d / bitsPerDigit) - 1;
for (g = biShiftLeft(g, i),
c += i,
j = Math.ceil(c / bitsPerDigit) - 1,
k = biMultiplyByRadixPower(b, j - h); -1 != biCompare(g, k); )
++f.digits[j - h],
g = biSubtract(g, k);
for (l = j; l > h; --l) {
for (m = l >= g.digits.length ? 0 : g.digits[l],
n = l - 1 >= g.digits.length ? 0 : g.digits[l - 1],
o = l - 2 >= g.digits.length ? 0 : g.digits[l - 2],
p = h >= b.digits.length ? 0 : b.digits[h],
q = h - 1 >= b.digits.length ? 0 : b.digits[h - 1],
f.digits[l - h - 1] = m == p ? maxDigitVal : Math.floor((m * biRadix + n) / p),
r = f.digits[l - h - 1] * (p * biRadix + q),
s = m * biRadixSquared + (n * biRadix + o); r > s; )
--f.digits[l - h - 1],
r = f.digits[l - h - 1] * (p * biRadix | q),
s = m * biRadix * biRadix + (n * biRadix + o);
k = biMultiplyByRadixPower(b, l - h - 1),
g = biSubtract(g, biMultiplyDigit(k, f.digits[l - h - 1])),
g.isNeg && (g = biAdd(g, k),
--f.digits[l - h - 1])
}
return g = biShiftRight(g, i),
f.isNeg = a.isNeg != e,
a.isNeg && (f = e ? biAdd(f, bigOne) : biSubtract(f, bigOne),
b = biShiftRight(b, i),
g = biSubtract(b, g)),
0 == g.digits[0] && 0 == biHighIndex(g) && (g.isNeg = !1),
new Array(f,g)
}
function biDivide(a, b) {
return biDivideModulo(a, b)[0]
}
function biModulo(a, b) {
return biDivideModulo(a, b)[1]
}
function biMultiplyMod(a, b, c) {
return biModulo(biMultiply(a, b), c)
}
function biPow(a, b) {
for (var c = bigOne, d = a; ; ) {
if (0 != (1 & b) && (c = biMultiply(c, d)),
b >>= 1,
0 == b)
break;
d = biMultiply(d, d)
}
return c
}
function biPowMod(a, b, c) {
for (var d = bigOne, e = a, f = b; ; ) {
if (0 != (1 & f.digits[0]) && (d = biMultiplyMod(d, e, c)),
f = biShiftRight(f, 1),
0 == f.digits[0] && 0 == biHighIndex(f))
break;
e = biMultiplyMod(e, e, c)
}
return d
}
function BarrettMu(a) {
this.modulus = biCopy(a),
this.k = biHighIndex(this.modulus) + 1;
var b = new BigInt;
b.digits[2 * this.k] = 1,
this.mu = biDivide(b, this.modulus),
this.bkplus1 = new BigInt,
this.bkplus1.digits[this.k + 1] = 1,
this.modulo = BarrettMu_modulo,
this.multiplyMod = BarrettMu_multiplyMod,
this.powMod = BarrettMu_powMod
}
function BarrettMu_modulo(a) {
var i, b = biDivideByRadixPower(a, this.k - 1), c = biMultiply(b, this.mu), d = biDivideByRadixPower(c, this.k + 1), e = biModuloByRadixPower(a, this.k + 1), f = biMultiply(d, this.modulus), g = biModuloByRadixPower(f, this.k + 1), h = biSubtract(e, g);
for (h.isNeg && (h = biAdd(h, this.bkplus1)),
i = biCompare(h, this.modulus) >= 0; i; )
h = biSubtract(h, this.modulus),
i = biCompare(h, this.modulus) >= 0;
return h
}
function BarrettMu_multiplyMod(a, b) {
var c = biMultiply(a, b);
return this.modulo(c)
}
function BarrettMu_powMod(a, b) {
var d, e, c = new BigInt;
for (c.digits[0] = 1,
d = a,
e = b; ; ) {
if (0 != (1 & e.digits[0]) && (c = this.multiplyMod(c, d)),
e = biShiftRight(e, 1),
0 == e.digits[0] && 0 == biHighIndex(e))
break;
d = this.multiplyMod(d, d)
}
return c
}
var maxDigits, ZERO_ARRAY, bigZero, bigOne, dpl10, lr10, hexatrigesimalToChar, hexToChar, highBitMasks, lowBitMasks, biRadixBase = 2, biRadixBits = 16, bitsPerDigit = biRadixBits, biRadix = 65536, biHalfRadix = biRadix >>> 1, biRadixSquared = biRadix * biRadix, maxDigitVal = biRadix - 1, maxInteger = 9999999999999998;
setMaxDigits(20),
dpl10 = 15,
lr10 = biFromNumber(1e15),
hexatrigesimalToChar = new Array("0","1","2","3","4","5","6","7","8","9","a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z"),
hexToChar = new Array("0","1","2","3","4","5","6","7","8","9","a","b","c","d","e","f"),
highBitMasks = new Array(0,32768,49152,57344,61440,63488,64512,65024,65280,65408,65472,65504,65520,65528,65532,65534,65535),
lowBitMasks = new Array(0,1,3,7,15,31,63,127,255,511,1023,2047,4095,8191,16383,32767,65535);
!function() {
function a(a) {
var d, e, b = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789", c = "";
for (d = 0; a > d; d += 1)
e = Math.random() * b.length,
e = Math.floor(e),
c += b.charAt(e);
return c
}
function b(a, b) {
var c = CryptoJS.enc.Utf8.parse(b)
, d = CryptoJS.enc.Utf8.parse("0102030405060708")
, e = CryptoJS.enc.Utf8.parse(a)
, f = CryptoJS.AES.encrypt(e, c, {
iv: d,
mode: CryptoJS.mode.CBC
});
return f.toString()
}
function c(a, b, c) {
var d, e;
return setMaxDigits(131),
d = new RSAKeyPair(b,"",c),
e = encryptedString(d, a)
}
function d(d, e, f, g) {
var h = {}
, i = a(16);
return h.encText = b(d, g),
h.encText = b(h.encText, i),
h.encSecKey = c(i, e, f),
h
}
function e(a, b, d, e) {
var f = {};
return f.encText = c(a + e, b, d),
f
}
window.asrsea = d,
window.ecnonasr = e
}();
function getData(id){
let result = window.asrsea(
JSON.stringify({"ids": [id],"level":"standard","encodeType":"aac","csrf_token":""}),
'010001',
'00e0b509f6259df8642dbc35662901477df22677ec152b5ff68ace615bb7b725152b3ab17a876aea8a5aa76d2e417629ec4ee341f56135fccf695280104e0312ecbda92557c93870114af6c9d05c4f7f0c3685b7a46bee255932575cce10b424d813cfe4875d3e82047b97ddef52741d546b8e289dc6935b3ece0462db0a22b8e7',
'0CoJUm6Qyw8W8jud'
);
return 'params='+encodeURIComponent(result.encText)+'&encSecKey='+result.encSecKey
}
function getParams(keyword){
let result = window.asrsea(
JSON.stringify({"hlpretag":"<span class=\"s-fc7\">","hlposttag":"</span>","s":keyword,"type":"1","offset":"0","total":"true","limit":"30","csrf_token":""}),
'010001',
'00e0b509f6259df8642dbc35662901477df22677ec152b5ff68ace615bb7b725152b3ab17a876aea8a5aa76d2e417629ec4ee341f56135fccf695280104e0312ecbda92557c93870114af6c9d05c4f7f0c3685b7a46bee255932575cce10b424d813cfe4875d3e82047b97ddef52741d546b8e289dc6935b3ece0462db0a22b8e7',
'0CoJUm6Qyw8W8jud'
);
return 'params='+encodeURIComponent(result.encText)+'&encSecKey='+result.encSecKey
}
2、execjs模块调用JS代码
import execjs
with open(file='encode.js', mode='r', encoding='utf-8') as fis:
js_code = fis.read() # 读取JS代码文件
js_obj = execjs.compile(js_code) # 激将JS代码传入
js_obj.call('function', 'params') # 调用JS的函数, 参数1：函数名、参数2：该函数所需要的参数
3、更多请关注公众号【程序员 小洲】
五、Pip模块安装
镜像地址
- 清华：https://pypi.tuna.tsinghua.edu.cn/simple
- 阿里云：http://mirrors.aliyun.com/pypi/simple/
- 中国科技大学 https://pypi.mirrors.ustc.edu.cn/simple/
- 华中理工大学：http://pypi.hustunique.com/
- 山东理工大学：http://pypi.sdutlinux.org/
- 豆瓣：http://pypi.douban.com/simple/
案例使用到的第三方模块以及对应版本
- requests==2.27.0
- PyExecJS==1.5.1
pip指定模块安装：pip install 模块名 -i https://pypi.tuna.tsinghua.edu.cn/simple
pip指定requirements.txt文件安装：pip install -i https://pypi.doubanio.com/simple/ -r requirements.txt
注意
本文章中所有内容仅供学习交流，抓包内容、敏感网址、数据接口均已做脱敏处理，严禁用于商业用途和非法用途，否则由此产生的一切后果均与作者无关，若有侵权，请联系我立即删除！
本文章未经许可禁止转载，禁止任何修改后二次传播，擅自使用本文讲解的技术而导致的任何意外，作者均不负责，若有侵权，请在公众号【程序员 小洲】联系作者立即删除！
