图灵爬虫练习平台 第十四题 逆向

题十四：神枪手
该题适合JS逆向进阶人群练习，对请求参数做了特殊处理。如果首次进入页面后无数据请手动刷新浏览器

先看看他是什么加密，发现这里是参数加密

m:  MTBjNzE3NDcxMTcxNTM4NTQA

还是老套路，进行堆栈分析，查看堆栈

打断点观察

继续打断点观察

找到加密的地方了，打断点进去看看

扣代码

ts = new Date()['\x67\x65\x74\x54\x69\x6d\x65'](),dd = b;var p = function(N) {const M = __sk_Q;let W = 0x2 * 0xf7f + 0x1 * -0x1af9 + -0x93 * 0x7;for (let L = 0x1 * 0x17bf + -0x1fff * -0x1 + -0x37be; f['\x52\x4c\x76\x74\x74'](L, N['\x6c\x65\x6e\x67\x74\x68']); L++) {var O = N['\x63\x68\x61\x72\x43\x6f\x64\x65\x41\x74'](L);for (let y = -0x1034 + -0x2131 + -0x2d * -0x119; y < -0x1ecd + -0x222c + 0x410d; y++)switch (f[M(__sk_GH.G)](y, 0x268a * -0x1 + -0x95c * -0x1 + -0x1d31 * -0x1)) {case 0x2d6 * 0xb + 0x2 * -0x3d + -0x1eb8:W = B['\x61\x70\x70\x6c\x79'](null, [W, O, y]);break;case -0x1a2f + -0x2448 + 0x3e78 * 0x1:W = J['\x61\x70\x70\x6c\x79'](null, [W, O, y]);break;case 0x2c3 + -0x1 * 0x244d + 0x218c:W = Y[M(0x197)](null, [W, O]);}}return W;}(z['\x79\x45\x7a\x65\x4c'] + ts), s = ['\x3f', '\x6d', '\x3d'][a(0x18e)](''), p = p['\x74\x6f\x53\x74\x72\x69\x6e\x67'](0x1 * 0x16c3 + -0x1887 * 0x1 + -0x9 * -0x34);return dd += z['\x66\x44\x61\x77\x78'](s, function(N) {const q = a;var W = z['\x47\x79\x67\x58\x59'];let O = '', L, y, k, H, D, K, S, I = 0xe * -0xdd + 0x3ad + 0x869;for (; z['\x42\x6f\x68\x51\x71'](I, N['\x6c\x65\x6e\x67\x74\x68']); )L = N['\x63\x68\x61\x72\x43\x6f\x64\x65\x41\x74'](I++),y = z['\x5a\x6d\x62\x4f\x61'](I, N['\x6c\x65\x6e\x67\x74\x68']) ? N['\x63\x68\x61\x72\x43\x6f\x64\x65\x41\x74'](I++) : -0x18f3 * -0x1 + -0xc5b * 0x3 + 0xc1e,k = I < N[q(__sk_GD.G)] ? N['\x63\x68\x61\x72\x43\x6f\x64\x65\x41\x74'](I++) : 0x1 * 0x4bf + -0xaf7 + -0x4 * -0x18e,H = L >> -0x7fb + -0x1ba1 + -0x2 * -0x11cf,D = (-0x39a * 0x1 + -0x5e * -0x35 + -0x1 * 0xfd9 & L) << -0x13b7 * -0x1 + 0xae9 + -0x1e9c | z['\x78\x42\x55\x50\x41'](y, -0x959 * 0x2 + -0x273 * -0xa + -0x5c8),K = z['\x73\x69\x64\x59\x79'](z['\x66\x59\x61\x6c\x4d'](0x3 * 0xceb + 0xf0 + -0x27a2 & y, -0x45d * -0x1 + -0x24b0 + 0x2055), z[q(__sk_GD.F)](k, 0x19a7 + 0x2d * -0xb2 + 0xcf * 0x7)),S = -0x283 + 0x178b + -0x14c9 & k,isNaN(y) ? K = S = 0x1058 + 0x67 * -0x61 + -0x7a5 * -0x3 : z[q(0x194)](isNaN, k) && (S = 0x13 * -0x20c + 0x2 * -0x1079 + -0x1 * -0x4816),O = z['\x66\x44\x61\x77\x78'](O, W['\x63\x68\x61\x72\x41\x74'](H)) + W[q(0x181)](D) + W[q(0x181)](K) + W['\x63\x68\x61\x72\x41\x74'](S);return O;}(z['\x66\x44\x61\x77\x78'](p, ts)));}

然后就是开始运行补代码