JS逆向学习-某某快药登陆参数

某某快药登陆参数

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分析请求

先来看登陆操作，输入错误的用户名密码，查看请求

发现登陆需要两个加密参数 sign 和 password ，经验丰富的已经发现是md5加密的了，因为有一个md5.js文件

继续查看该请求的initiator，有一个名为 “denglu” 的记录，定位该位置并查看

然后进行断点调试

确定这里就是我们要找的东西，其中 passwod 通过 MD5 进行加密，getRequestURL 构建了登陆url，参数为固定字符串 “$$.urls.url_user” 和一个 s 对象

逆向

和平常一样缺什么补什么，就不细讲了

js代码

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var MD5 = function(r) {
    function n(r, n) {
        return r << n | r >>> 32 - n
    }
    function t(r, n) {
        var t, o, e, u, f;
        return e = 2147483648 & r,
            u = 2147483648 & n,
            t = 1073741824 & r,
            o = 1073741824 & n,
            f = (1073741823 & r) + (1073741823 & n),
            t & o ? 2147483648 ^ f ^ e ^ u : t | o ? 1073741824 & f ? 3221225472 ^ f ^ e ^ u : 1073741824 ^ f ^ e ^ u : f ^ e ^ u
    }
    function o(r, n, t) {
        return r & n | ~r & t
    }
    function e(r, n, t) {
        return r & t | n & ~t
    }
    function u(r, n, t) {
        return r ^ n ^ t
    }
    function f(r, n, t) {
        return n ^ (r | ~t)
    }
    function i(r, e, u, f, i, a, c) {
        return r = t(r, t(t(o(e, u, f), i), c)),
            t(n(r, a), e)
    }
    function a(r, o, u, f, i, a, c) {
        return r = t(r, t(t(e(o, u, f), i), c)),
            t(n(r, a), o)
    }
    function c(r, o, e, f, i, a, c) {
        return r = t(r, t(t(u(o, e, f), i), c)),
            t(n(r, a), o)
    }
    function C(r, o, e, u, i, a, c) {
        return r = t(r, t(t(f(o, e, u), i), c)),
            t(n(r, a), o)
    }
    function g(r) {
        var n, t, o = "", e = "";
        for (t = 0; t <= 3; t++)
            n = r >>> 8 * t & 255,
                e = "0" + n.toString(16),
                o += e.substr(e.length - 2, 2);
        return o
    }
    var h, d, v, S, m, l, A, p, s, y = Array();
    for (r = function(r) {
        r = r.replace(/\r\n/g, "\n");
        for (var n = "", t = 0; t < r.length; t++) {
            var o = r.charCodeAt(t);
            o < 128 ? n += String.fromCharCode(o) : o > 127 && o < 2048 ? (n += String.fromCharCode(o >> 6 | 192),
                n += String.fromCharCode(63 & o | 128)) : (n += String.fromCharCode(o >> 12 | 224),
                n += String.fromCharCode(o >> 6 & 63 | 128),
                n += String.fromCharCode(63 & o | 128))
        }
        return n
    }(r),
             y = function(r) {
                 for (var n, t = r.length, o = t + 8, e = (o - o % 64) / 64, u = 16 * (e + 1), f = Array(u - 1), i = 0, a = 0; a < t; )
                     n = (a - a % 4) / 4,
                         i = a % 4 * 8,
                         f[n] = f[n] | r.charCodeAt(a) << i,
                         a++;
                 return n = (a - a % 4) / 4,
                     i = a % 4 * 8,
                     f[n] = f[n] | 128 << i,
                     f[u - 2] = t << 3,
                     f[u - 1] = t >>> 29,
                     f
             }(r),
             l = 1732584193,
             A = 4023233417,
             p = 2562383102,
             s = 271733878,
             h = 0; h < y.length; h += 16)
        d = l,
            v = A,
            S = p,
            m = s,
            l = i(l, A, p, s, y[h + 0], 7, 3614090360),
            s = i(s, l, A, p, y[h + 1], 12, 3905402710),
            p = i(p, s, l, A, y[h + 2], 17, 606105819),
            A = i(A, p, s, l, y[h + 3], 22, 3250441966),
            l = i(l, A, p, s, y[h + 4], 7, 4118548399),
            s = i(s, l, A, p, y[h + 5], 12, 1200080426),
            p = i(p, s, l, A, y[h + 6], 17, 2821735955),
            A = i(A, p, s, l, y[h + 7], 22, 4249261313),
            l = i(l, A, p, s, y[h + 8], 7, 1770035416),
            s = i(s, l, A, p, y[h + 9], 12, 2336552879),
            p = i(p, s, l, A, y[h + 10], 17, 4294925233),
            A = i(A, p, s, l, y[h + 11], 22, 2304563134),
            l = i(l, A, p, s, y[h + 12], 7, 1804603682),
            s = i(s, l, A, p, y[h + 13], 12, 4254626195),
            p = i(p, s, l, A, y[h + 14], 17, 2792965006),
            A = i(A, p, s, l, y[h + 15], 22, 1236535329),
            l = a(l, A, p, s, y[h + 1], 5, 4129170786),
            s = a(s, l, A, p, y[h + 6], 9, 3225465664),
            p = a(p, s, l, A, y[h + 11], 14, 643717713),
            A = a(A, p, s, l, y[h + 0], 20, 3921069994),
            l = a(l, A, p, s, y[h + 5], 5, 3593408605),
            s = a(s, l, A, p, y[h + 10], 9, 38016083),
            p = a(p, s, l, A, y[h + 15], 14, 3634488961),
            A = a(A, p, s, l, y[h + 4], 20, 3889429448),
            l = a(l, A, p, s, y[h + 9], 5, 568446438),
            s = a(s, l, A, p, y[h + 14], 9, 3275163606),
            p = a(p, s, l, A, y[h + 3], 14, 4107603335),
            A = a(A, p, s, l, y[h + 8], 20, 1163531501),
            l = a(l, A, p, s, y[h + 13], 5, 2850285829),
            s = a(s, l, A, p, y[h + 2], 9, 4243563512),
            p = a(p, s, l, A, y[h + 7], 14, 1735328473),
            A = a(A, p, s, l, y[h + 12], 20, 2368359562),
            l = c(l, A, p, s, y[h + 5], 4, 4294588738),
            s = c(s, l, A, p, y[h + 8], 11, 2272392833),
            p = c(p, s, l, A, y[h + 11], 16, 1839030562),
            A = c(A, p, s, l, y[h + 14], 23, 4259657740),
            l = c(l, A, p, s, y[h + 1], 4, 2763975236),
            s = c(s, l, A, p, y[h + 4], 11, 1272893353),
            p = c(p, s, l, A, y[h + 7], 16, 4139469664),
            A = c(A, p, s, l, y[h + 10], 23, 3200236656),
            l = c(l, A, p, s, y[h + 13], 4, 681279174),
            s = c(s, l, A, p, y[h + 0], 11, 3936430074),
            p = c(p, s, l, A, y[h + 3], 16, 3572445317),
            A = c(A, p, s, l, y[h + 6], 23, 76029189),
            l = c(l, A, p, s, y[h + 9], 4, 3654602809),
            s = c(s, l, A, p, y[h + 12], 11, 3873151461),
            p = c(p, s, l, A, y[h + 15], 16, 530742520),
            A = c(A, p, s, l, y[h + 2], 23, 3299628645),
            l = C(l, A, p, s, y[h + 0], 6, 4096336452),
            s = C(s, l, A, p, y[h + 7], 10, 1126891415),
            p = C(p, s, l, A, y[h + 14], 15, 2878612391),
            A = C(A, p, s, l, y[h + 5], 21, 4237533241),
            l = C(l, A, p, s, y[h + 12], 6, 1700485571),
            s = C(s, l, A, p, y[h + 3], 10, 2399980690),
            p = C(p, s, l, A, y[h + 10], 15, 4293915773),
            A = C(A, p, s, l, y[h + 1], 21, 2240044497),
            l = C(l, A, p, s, y[h + 8], 6, 1873313359),
            s = C(s, l, A, p, y[h + 15], 10, 4264355552),
            p = C(p, s, l, A, y[h + 6], 15, 2734768916),
            A = C(A, p, s, l, y[h + 13], 21, 1309151649),
            l = C(l, A, p, s, y[h + 4], 6, 4149444226),
            s = C(s, l, A, p, y[h + 11], 10, 3174756917),
            p = C(p, s, l, A, y[h + 2], 15, 718787259),
            A = C(A, p, s, l, y[h + 9], 21, 3951481745),
            l = t(l, d),
            A = t(A, v),
            p = t(p, S),
            s = t(s, m);
    return (g(l) + g(A) + g(p) + g(s)).toUpperCase()
};

var DMap = function() {
    this.data = {},
        this.len = 0,
        this.size = function() {
            return this.len
        }
        ,
        this.isEmpty = function() {
            return this.len < 1
        }
        ,
        this.clear = function() {
            this.data = {},
                this.len = 0
        }
        ,
        this.put = function(e, t) {
            this.data[e] = void 0 == t || "null" == t || "" == t ? "" : t,
                this.len++
        }
        ,
        this.remove = function(e) {
            return this.data[e] = null,
                this.len--,
                !0
        }
        ,
        this.get = function(e) {
            return this.data[e]
        }
        ,
        this.containsKey = function(e) {
            return !!this.data[e]
        }
        ,
        this.containsValue = function(e) {
            try {
                for (var t in this.data)
                    if (this.data[t] == e)
                        return !0
            } catch (e) {
                return !1
            }
            return !1
        }
        ,
        this.values = function() {
            var e = new Array;
            for (var t in this.data)
                e.push(this.data[t]);
            return e
        }
        ,
        this.keys = function() {
            var e = new Array;
            for (var t in this.data)
                e.push(t);
            return e
        }
}

var getRequestURL = function(e, t, i) {
    if (i && 1 == i)
        var r = "V8E26BD7FN76D08C349A43D6D3M51A1B";
    else
        var r = "6C57AB91A1308E26B797F4CD382AC79D";
    _this = this;
    var s = new Date
        , n = s.getFullYear()
        , o = s.getMonth() + 1
        , a = s.getDate()
        , c = s.getHours()
        , h = s.getMinutes()
        , d = s.getSeconds()
        , u = n + "-" + o + "-" + a + " " + c + ":" + h + ":" + d;
    t.put("t", u),
        t.put("v", "1.0"),
    t.containsKey("versionName") || t.put("versionName", "4.6.0"),
        t.put("plat", "H5"),
        t.put("platform", "H5");
    //     !t.containsKey("userId") || t.containsKey("loginToken") || t.containsKey("uDate") ? t.containsKey("userId") || _this.getUserId() && (t.put("loginToken", _this.getLoginToken()),
    //         t.put("uDate", _this.getUDate()),
    //         t.put("userId", _this.getUserId())) : (t.put("loginToken", _this.getLoginToken()),
    //         t.put("uDate", _this.getUDate()));
    var l = t.keys().sort()
        , p = "";
    l.length;
    for (var g in l) {
        var m = l[g];
        p += m + t.get(m)
    }
    for (var f = t.get("method") + p + r, y = MD5(f), v = e + "?sign=" + y, k = 0; k < l.length; k++)
        (t.get(l[k]) + "").indexOf("+") >= 0 || -1 != (t.get(l[k]) + "").indexOf("&") ? v += "&" + l[k] + "=" + encodeURIComponent(t.get(l[k])) : "pageUrl" == l[k] ? v += "&" + l[k] + "=" + encodeURIComponent(t.get(l[k])) : v += "&" + l[k] + "=" + t.get(l[k]);
    return v
}

var codes = ["010101,010104", "010502,010503,010504,010505,010506,010507", "010401,010402,010403,010404,010406,010407", "010801,010802,010803,010804,010901,010902,010807", "011303,010609", "011501,011502,011503,011504,011505,010301,010302,0…,010706,010707,010709,010710,010711,011101,011106", "020101,020103,020105,020201,020202,020203", "020403,020404,020406,020409,020414", "030101,030102,030103,030107,030108,030109,030110,030111,030113", "030201,030202,030204", "040101,040501,040502,040404,040201,040204", "060901,061103,060603,060604,060607,060609,060610,0…,060804,060805,060402,060403,060201,060701,060702", "060104"]

function denglu(username, password) {
    var e = username
    var s = new DMap;
    var url_user = "http://wxapi.ddky.com/user/rest.htm"
    s.put("userName", e),
        s.put("password", MD5(password).toLowerCase()),
        s.put("method", "ddsy.user.reg.login");
    var a = getRequestURL(url_user, s);

    return a
}


function loadProduct(index) {
    var _url = 1 ? 'http://product.ddky.com/product/queryOrgcodeProductListForB2C.htm' : 'http://192.168.89.38/product/queryOrgcodeProductListForB2C.htm';
    var params = new DMap();
    params.put('orgcode', codes[index]);
    params.put('orderTypeId', '0');
    params.put('shopId', "-1");
    params.put('pageNo', '1');
    params.put('pageSize', '100');
    params.put('otcMark', '1,2,99');
    params.put('method', 'ddsy.product.query.orgcode.product.list.b2c');
    params.put('versionName', '3.2.0');
    var req = getRequestURL(_url, params);
    return req
}

总结

真的没什么难度，只是需要注意不添加请求中的 callback 参数会直接返回可以使用JSON解析的数据格式。