淘宝h5 页面 sign加密算法

1.淘宝sign加密算法

淘宝对于h5的访问采用了和客户端不同的方式，由于在h5的js代码中保存appsercret具有较高的风险，mtop采用了随机分配令牌的方式，为每个访问端分配一个token，保存在用户的cookie中，通过cookie带回服务端分配的token, 客户端利用分配的token对请求的URL参数生成摘要值sign,

MTOP利用这个摘用值和cookie中的token来防止URL篡改。

2.流程

当本地cookie中的token为空时（通常是第一次访问），mtop会收到”FAIL_SYS_TOKEN_EXOIRED:: 令牌过期“这个错误应答，同时mtop会生成token写入cookie中（response.cookies）。
第二次请求时，js通过读取cookie中的token值，按照约定的算法生成sign, sign在mtop的请求中带上，mtop通过cookie中和token用同样的方式计算出sign,与请求的sign进行比较，检查通过将返回api的应答，失败提示“FAIL_SYS_ILLEGAL_ACCESS:: 非法请求”
cookie中的token是有时效性的，遇到token失效时，将收到应答"FAIL_SYS_TOKEN_EXOIRED:: 令牌过期", 同时会写入新的token,js利用新的token重新计算sign并重发请求。
关于cookie中的token的自我检查，由于token在cookie中是明文的，可能会被仿冒，在输出的cookie中包含一个用非对称密钥的公钥加密后的token, MTOP在每次请求时会先检查cookie中的token是否是由服务端分配出去的（利用加密后的token和私钥还原token，与回传的明文token比较）

3.sign 生成

关于sign的生成公式：

md5Hex(token&t&appKey&data)
如：md5Hex(“645d1f414d4914297dfaab40f3f76016 &1234&4272&{"itemNumId":"1500011132496"}”)

sign=d2b2f818a03496b296b899a230c03abd

token
关于cookie的有效时长，cookie的有效时长为7天，但是token的有效时长目前为60分钟

m_h5tk: 格式为 明文token_expireTime, 从response.cookies处获取，如： 2fcd2baa62fc60f73c0487a9f8a0a9d1_1362559577301

token就是2fcd2baa62fc60f73c0487a9f8a0a9d1

t
很简单，即时间戳 int(time.time()*1000)

appKey
一般是固定数值

data
一般是提交的参数

example

4.抠出js

function get_sign_demo(the_params_for_signing) {
    function t(e, t) {
        return e << t | e >>> 32 - t
    }

    function n(e, t) {
        var n, o, i, r, s;
        return i = 2147483648 & e, r = 2147483648 & t, n = 1073741824 & e, o = 1073741824 & t, s = (1073741823 & e) + (1073741823 & t), n & o ? 2147483648 ^ s ^ i ^ r : n | o ? 1073741824 & s ? 3221225472 ^ s ^ i ^ r : 1073741824 ^ s ^ i ^ r : s ^ i ^ r
    }

    function o(e, t, n) {
        return e & t | ~e & n
    }

    function i(e, t, n) {
        return e & n | t & ~n
    }

    function r(e, t, n) {
        return e ^ t ^ n
    }

    function s(e, t, n) {
        return t ^ (e | ~n)
    }

    function a(e, i, r, s, a, p, u) {
        return e = n(e, n(n(o(i, r, s), a), u)), n(t(e, p), i)
    }

    function p(e, o, r, s, a, p, u) {
        return e = n(e, n(n(i(o, r, s), a), u)), n(t(e, p), o)
    }

    function u(e, o, i, s, a, p, u) {
        return e = n(e, n(n(r(o, i, s), a), u)), n(t(e, p), o)
    }

    function c(e, o, i, r, a, p, u) {
        return e = n(e, n(n(s(o, i, r), a), u)), n(t(e, p), o)
    }

    function d(e) {
        for (var t, n = e.length, o = n + 8, i = (o - o % 64) / 64, r = 16 * (i + 1), s = new Array(r - 1), a = 0, p = 0; n > p;) {
            t = (p - p % 4) / 4, a = p % 4 * 8, s[t] = s[t] | e.charCodeAt(p) << a, p++
        }
        return t = (p - p % 4) / 4, a = p % 4 * 8, s[t] = s[t] | 128 << a, s[r - 2] = n << 3, s[r - 1] = n >>> 29, s
    }

    function l(e) {
        var t, n, o = "",
            i = "";
        for (n = 0; 3 >= n; n++) {
            t = e >>> 8 * n & 255, i = "0" + t.toString(16), o += i.substr(i.length - 2, 2)
        }
        return o
    }

    function f(e) {
        e = e.replace(/\r\n/g, "\n");
        for (var t = "", n = 0; n < e.length; n++) {
            var o = e.charCodeAt(n);
            128 > o ? t += String.fromCharCode(o) : o > 127 && 2048 > o ? (t += String.fromCharCode(o >> 6 | 192), t += String.fromCharCode(63 & o | 128)) : (t += String.fromCharCode(o >> 12 | 224), t += String.fromCharCode(o >> 6 & 63 | 128), t += String.fromCharCode(63 & o | 128))
        }
        return t
    }

    var m, h, g, v, _, y, R, w, E, S = [],
        O = 7,
        b = 12,
        T = 17,
        q = 22,
        A = 5,
        x = 9,
        C = 14,
        N = 20,
        J = 4,
        k = 11,
        L = 16,
        D = 23,
        I = 6,
        P = 10,
        F = 15,
        j = 21;
    for (the_params_for_signing = f(the_params_for_signing), S = d(the_params_for_signing), y = 1732584193, R = 4023233417, w = 2562383102, E = 271733878, m = 0; m < S.length; m += 16) {
        h = y, g = R, v = w, _ = E, y = a(y, R, w, E, S[m + 0], O, 3614090360), E = a(E, y, R, w, S[m + 1], b, 3905402710), w = a(w, E, y, R, S[m + 2], T, 606105819), R = a(R, w, E, y, S[m + 3], q, 3250441966), y = a(y, R, w, E, S[m + 4], O, 4118548399), E = a(E, y, R, w, S[m + 5], b, 1200080426), w = a(w, E, y, R, S[m + 6], T, 2821735955), R = a(R, w, E, y, S[m + 7], q, 4249261313), y = a(y, R, w, E, S[m + 8], O, 1770035416), E = a(E, y, R, w, S[m + 9], b, 2336552879), w = a(w, E, y, R, S[m + 10], T, 4294925233), R = a(R, w, E, y, S[m + 11], q, 2304563134), y = a(y, R, w, E, S[m + 12], O, 1804603682), E = a(E, y, R, w, S[m + 13], b, 4254626195), w = a(w, E, y, R, S[m + 14], T, 2792965006), R = a(R, w, E, y, S[m + 15], q, 1236535329), y = p(y, R, w, E, S[m + 1], A, 4129170786), E = p(E, y, R, w, S[m + 6], x, 3225465664), w = p(w, E, y, R, S[m + 11], C, 643717713), R = p(R, w, E, y, S[m + 0], N, 3921069994), y = p(y, R, w, E, S[m + 5], A, 3593408605), E = p(E, y, R, w, S[m + 10], x, 38016083), w = p(w, E, y, R, S[m + 15], C, 3634488961), R = p(R, w, E, y, S[m + 4], N, 3889429448), y = p(y, R, w, E, S[m + 9], A, 568446438), E = p(E, y, R, w, S[m + 14], x, 3275163606), w = p(w, E, y, R, S[m + 3], C, 4107603335), R = p(R, w, E, y, S[m + 8], N, 1163531501), y = p(y, R, w, E, S[m + 13], A, 2850285829), E = p(E, y, R, w, S[m + 2], x, 4243563512), w = p(w, E, y, R, S[m + 7], C, 1735328473), R = p(R, w, E, y, S[m + 12], N, 2368359562), y = u(y, R, w, E, S[m + 5], J, 4294588738), E = u(E, y, R, w, S[m + 8], k, 2272392833), w = u(w, E, y, R, S[m + 11], L, 1839030562), R = u(R, w, E, y, S[m + 14], D, 4259657740), y = u(y, R, w, E, S[m + 1], J, 2763975236), E = u(E, y, R, w, S[m + 4], k, 1272893353), w = u(w, E, y, R, S[m + 7], L, 4139469664), R = u(R, w, E, y, S[m + 10], D, 3200236656), y = u(y, R, w, E, S[m + 13], J, 681279174), E = u(E, y, R, w, S[m + 0], k, 3936430074), w = u(w, E, y, R, S[m + 3], L, 3572445317), R = u(R, w, E, y, S[m + 6], D, 76029189), y = u(y, R, w, E, S[m + 9], J, 3654602809), E = u(E, y, R, w, S[m + 12], k, 3873151461), w = u(w, E, y, R, S[m + 15], L, 530742520), R = u(R, w, E, y, S[m + 2], D, 3299628645), y = c(y, R, w, E, S[m + 0], I, 4096336452), E = c(E, y, R, w, S[m + 7], P, 1126891415), w = c(w, E, y, R, S[m + 14], F, 2878612391), R = c(R, w, E, y, S[m + 5], j, 4237533241), y = c(y, R, w, E, S[m + 12], I, 1700485571), E = c(E, y, R, w, S[m + 3], P, 2399980690), w = c(w, E, y, R, S[m + 10], F, 4293915773), R = c(R, w, E, y, S[m + 1], j, 2240044497), y = c(y, R, w, E, S[m + 8], I, 1873313359), E = c(E, y, R, w, S[m + 15], P, 4264355552), w = c(w, E, y, R, S[m + 6], F, 2734768916), R = c(R, w, E, y, S[m + 13], j, 1309151649), y = c(y, R, w, E, S[m + 4], I, 4149444226), E = c(E, y, R, w, S[m + 11], P, 3174756917), w = c(w, E, y, R, S[m + 2], F, 718787259), R = c(R, w, E, y, S[m + 9], j, 3951481745), y = n(y, h), R = n(R, g), w = n(w, v), E = n(E, _)
    }
    var H = l(y) + l(R) + l(w) + l(E);
    return H.toLowerCase()
}

#!/usr/bin/env python
# -*- coding:utf-8 -*-

import js2py
import os
import threading
mutex = threading.Lock()

# with open(r"D:\taobao_sign.js", encoding='utf-8') as f:
    cx = f.read()
context = js2py.EvalJs()
context.execute(cx)

def get_sign(_m_h5_tk_first, time_dd, data):
    with open(r"D:\taobao_sign.js", encoding='utf-8') as f:
        cx = f.read()

    ctx = execjs.compile(cx)
    sign_str = _m_h5_tk_first + "&" + time_dd + "&" + "12574478" + "&" + data
    sign = ctx.call("get_sign_demo", sign_str)
    print("sign : ", sign)

    mutex.acquire()
    context = js2py.EvalJs()
    context.execute(cx)
    sign_str = _m_h5_tk_first + "&" + time_dd + "&" + "12574478" + "&" + data
    sign = context.get_sign_demo(sign_str)
    # mutex.release()
    return sign