爬虫逆向实战（三）--天某云登录

一、数据接口分析

主页地址：天某云

1、抓包

通过抓包可以发现登录接口是account/login

2、判断是否有加密参数

1. 请求参数是否加密？
   通过“载荷”模块可以发现password、comParam_signature、comParam_seqCode是加密的
   
2. 请求头是否加密？
   无
3. cookie是否加密？
   无
4. 响应数据是否加密？
   无

二、加密位置定位

1、password

（1）查看启动器

查看启动器发现里面包含异步，所以无法正确找到加密位置

（2）搜索关键字

搜索关键字password:发现有一处位置类似加密位置

在此处打上断点，再次点击登录，返现可以断住，并且a.value是明文，断点的一行是加密的，所以可以断定密码是在此处加密的

2、comParam_signature和comParam_seqCode

直接搜索comParam_signature可以发现只有一处位置有，并且是在请求拦截器中

在此处打断点，然后点击登录，发现可以断住，并且生成方法在这一行上方

三、扣js代码

将上方找到的加密位置代码扣出，缺啥补啥即可
源代码：

var CryptoJS = require('crypto-js')function desEncrypt(text, n) {var key = CryptoJS.enc.Utf8.parse(n),srcs = CryptoJS.enc.Utf8.parse(text),// CBC 加密模式，Pkcs7 填充方式encrypted = CryptoJS.TripleDES.encrypt(srcs, key, {mode: CryptoJS.mode.ECB,padding: CryptoJS.pad.Pkcs7});return encrypted.toString();
}function password_g() {var e = arguments.length > 0 && void 0 !== arguments[0] ? arguments[0] : "";return e.replace(/\s+/g, "")
}function password_f(e) {var n = arguments.length > 1 && void 0 !== arguments[1] ? arguments[1] : {};if (e && "string" === typeof e) {var t = n.text || "0", r = n.length || 24;if (e.length < r)for (var a = e.length; a < r; a++)e += t;elsee = e.substring(0, r);return e}
}function param_k() {var e, n, t = arguments.length > 0 && void 0 !== arguments[0] ? arguments[0] : 32,r = arguments.length > 1 && void 0 !== arguments[1] ? arguments[1] : 16,a = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz".split(""), o = [];if (r = r || a.length,t)for (e = 0; e < t; e++)o[e] = a[0 | Math.random() * r];elsefor (o[8] = o[13] = o[18] = o[23] = "-",o[14] = "4",e = 0; e < 36; e++)o[e] || (n = 0 | 16 * Math.random(),o[e] = a[19 === e ? 3 & n | 8 : n]);return o.join("")
}function i(t, e) {var n = (65535 & t) + (65535 & e), r = (t >> 16) + (e >> 16) + (n >> 16);return r << 16 | 65535 & n
}function a(t, e) {return t << e | t >>> 32 - e
}function c(t, e, n, r, o, c) {return i(a(i(i(e, t), i(r, c)), o), n)
}function u(t, e, n, r, o, i, a) {return c(e & n | ~e & r, t, e, o, i, a)
}function s(t, e, n, r, o, i, a) {return c(e & r | n & ~r, t, e, o, i, a)
}function f(t, e, n, r, o, i, a) {return c(e ^ n ^ r, t, e, o, i, a)
}function l(t, e, n, r, o, i, a) {return c(n ^ (e | ~r), t, e, o, i, a)
}function param_p(t, e) {var n, r, o, a, c;t[e >> 5] |= 128 << e % 32,t[14 + (e + 64 >>> 9 << 4)] = e;var p = 1732584193, h = -271733879, d = -1732584194, v = 271733878;for (n = 0; n < t.length; n += 16)r = p,o = h,a = d,c = v,p = u(p, h, d, v, t[n], 7, -680876936),v = u(v, p, h, d, t[n + 1], 12, -389564586),d = u(d, v, p, h, t[n + 2], 17, 606105819),h = u(h, d, v, p, t[n + 3], 22, -1044525330),p = u(p, h, d, v, t[n + 4], 7, -176418897),v = u(v, p, h, d, t[n + 5], 12, 1200080426),d = u(d, v, p, h, t[n + 6], 17, -1473231341),h = u(h, d, v, p, t[n + 7], 22, -45705983),p = u(p, h, d, v, t[n + 8], 7, 1770035416),v = u(v, p, h, d, t[n + 9], 12, -1958414417),d = u(d, v, p, h, t[n + 10], 17, -42063),h = u(h, d, v, p, t[n + 11], 22, -1990404162),p = u(p, h, d, v, t[n + 12], 7, 1804603682),v = u(v, p, h, d, t[n + 13], 12, -40341101),d = u(d, v, p, h, t[n + 14], 17, -1502002290),h = u(h, d, v, p, t[n + 15], 22, 1236535329),p = s(p, h, d, v, t[n + 1], 5, -165796510),v = s(v, p, h, d, t[n + 6], 9, -1069501632),d = s(d, v, p, h, t[n + 11], 14, 643717713),h = s(h, d, v, p, t[n], 20, -373897302),p = s(p, h, d, v, t[n + 5], 5, -701558691),v = s(v, p, h, d, t[n + 10], 9, 38016083),d = s(d, v, p, h, t[n + 15], 14, -660478335),h = s(h, d, v, p, t[n + 4], 20, -405537848),p = s(p, h, d, v, t[n + 9], 5, 568446438),v = s(v, p, h, d, t[n + 14], 9, -1019803690),d = s(d, v, p, h, t[n + 3], 14, -187363961),h = s(h, d, v, p, t[n + 8], 20, 1163531501),p = s(p, h, d, v, t[n + 13], 5, -1444681467),v = s(v, p, h, d, t[n + 2], 9, -51403784),d = s(d, v, p, h, t[n + 7], 14, 1735328473),h = s(h, d, v, p, t[n + 12], 20, -1926607734),p = f(p, h, d, v, t[n + 5], 4, -378558),v = f(v, p, h, d, t[n + 8], 11, -2022574463),d = f(d, v, p, h, t[n + 11], 16, 1839030562),h = f(h, d, v, p, t[n + 14], 23, -35309556),p = f(p, h, d, v, t[n + 1], 4, -1530992060),v = f(v, p, h, d, t[n + 4], 11, 1272893353),d = f(d, v, p, h, t[n + 7], 16, -155497632),h = f(h, d, v, p, t[n + 10], 23, -1094730640),p = f(p, h, d, v, t[n + 13], 4, 681279174),v = f(v, p, h, d, t[n], 11, -358537222),d = f(d, v, p, h, t[n + 3], 16, -722521979),h = f(h, d, v, p, t[n + 6], 23, 76029189),p = f(p, h, d, v, t[n + 9], 4, -640364487),v = f(v, p, h, d, t[n + 12], 11, -421815835),d = f(d, v, p, h, t[n + 15], 16, 530742520),h = f(h, d, v, p, t[n + 2], 23, -995338651),p = l(p, h, d, v, t[n], 6, -198630844),v = l(v, p, h, d, t[n + 7], 10, 1126891415),d = l(d, v, p, h, t[n + 14], 15, -1416354905),h = l(h, d, v, p, t[n + 5], 21, -57434055),p = l(p, h, d, v, t[n + 12], 6, 1700485571),v = l(v, p, h, d, t[n + 3], 10, -1894986606),d = l(d, v, p, h, t[n + 10], 15, -1051523),h = l(h, d, v, p, t[n + 1], 21, -2054922799),p = l(p, h, d, v, t[n + 8], 6, 1873313359),v = l(v, p, h, d, t[n + 15], 10, -30611744),d = l(d, v, p, h, t[n + 6], 15, -1560198380),h = l(h, d, v, p, t[n + 13], 21, 1309151649),p = l(p, h, d, v, t[n + 4], 6, -145523070),v = l(v, p, h, d, t[n + 11], 10, -1120210379),d = l(d, v, p, h, t[n + 2], 15, 718787259),h = l(h, d, v, p, t[n + 9], 21, -343485551),p = i(p, r),h = i(h, o),d = i(d, a),v = i(v, c);return [p, h, d, v]
}function param_d(t) {var e, n = [];for (n[(t.length >> 2) - 1] = void 0,e = 0; e < n.length; e += 1)n[e] = 0;var r = 8 * t.length;for (e = 0; e < r; e += 8)n[e >> 5] |= (255 & t.charCodeAt(e / 8)) << e % 32;return n
}function param_h(t) {var e, n = "", r = 32 * t.length;for (e = 0; e < r; e += 8)n += String.fromCharCode(t[e >> 5] >>> e % 32 & 255);return n
}function param_v(t) {return param_h(param_p(param_d(t), 8 * t.length))
}function param_b(t) {return unescape(encodeURIComponent(t))
}function param_m(t) {return param_v(param_b(t))
}function param_g(t) {var e, n, r = "0123456789abcdef", o = "";for (n = 0; n < t.length; n += 1)e = t.charCodeAt(n),o += r.charAt(e >>> 4 & 15) + r.charAt(15 & e);return o
}function param_(t) {return param_g(param_m(t))
}function param_c(t, e, n) {return param_(t)
}function get_password(account, password) {return encodeURI(desEncrypt(password, password_f(password_g(account))))
}function get_params() {var n = (new Date).getTime() - 1884var t = "s54zv9bm1vd5czfujy6nnuxj1l4g2ny6"var r = param_k()var a = param_c(n + r + param_c(r + t + n));return {'referrer': 'wap','mainVersion': 300031500,'comParam_curTime': n,'comParam_seqCode': r,'comParam_signature': a,'isCheck': true,'locale': 'zh-cn',}
}