WebApi MD5 加密（JS + MVC 4）

其他 2018-11-15 22:30:57 阅读次数: 0

1、先是前端加密请求

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title>测试 - api</title>
    <script src="/Scripts/jquery-1.11.3.min.js" type="text/javascript"></script>
    <script type="text/javascript">
        $(function () {
            var apiParams = {
                account: "admin",
                password: "111111"
            };
            debugger;
           //因为此项目中，我所有的接口都需要userid ，所以不用的时候就传0
            $.ajax({
                url: "/api/user/login?token=" + paramsMd5(apiParams, "0") + "&UserId=0",
                data:apiParams,
                dataType: "json",
                type: "POST",
                async: false,
                success: function (data) {
                    $("#datashow").html(JSON.stringify(data));
                },
                error: function (ex) {
                    $("#datashow").html(JSON.stringify(ex));
                }
            });
            return;
        });
    </script>
</head>
<body>
    <div id="datetimeShow"></div>
    <div id="datetimeShowEnd"></div>
    <div id="datashow">
        
    </div>
    
    <div class="content">
        <input id="test" value="baidu.com" style="width: 90%"/>
        <input type="button" value="md5 加密" onclick="demo();" />
		<br/>
		MD5:<label id="testmd5"></label>
	</div>
</body>
</html>
<script type="text/javascript">
    //此token 是和服务器约定的一个Key，我是给用户表建一个字段，用户可以重置此KEY
    var token = "gettokeykey";
    function paramsMd5(arr,userid) {
        var newarr = new Array();
        for (key in arr) {
            newarr.push(key);
        }
        newarr.sort(function (a, b) { return a.toLowerCase() > b.toLowerCase() ? 1 : -1; });
        var md5Str = "UserId=" + userid;
        for (var i in newarr) {
            var ks = newarr[i];
            md5Str += ("&" + ks + "=" + arr[ks]);
        }
        md5Str += token;
        return calcMD5(md5Str);
    }
    var hexcase = 0;
    var b64pad = "";
    var chrsz = 8;
    function hex_md5(s) { return binl2hex(core_md5(str2binl(s), s.length * chrsz)); }
    function b64_md5(s) { return binl2b64(core_md5(str2binl(s), s.length * chrsz)); }
    function hex_hmac_md5(key, data) { return binl2hex(core_hmac_md5(key, data)); }
    function b64_hmac_md5(key, data) { return binl2b64(core_hmac_md5(key, data)); }
    function calcMD5(s) { return binl2hex(core_md5(str2binl(s), s.length * chrsz)); }

    function md5_vm_test() {
        return hex_md5("abc") == "900150983cd24fb0d6963f7d28e17f72";
    }

    function core_md5(x, len) {

        x[len >> 5] |= 0x80 << ((len) % 32);
        x[(((len + 64) >>> 9) << 4) + 14] = len;
        var a = 1732584193;
        var b = -271733879;
        var c = -1732584194;
        var d = 271733878;
        for (var i = 0; i < x.length; i += 16) {
            var olda = a;
            var oldb = b;
            var oldc = c;
            var oldd = d;

            a = md5_ff(a, b, c, d, x[i + 0], 7, -680876936);
            d = md5_ff(d, a, b, c, x[i + 1], 12, -389564586);
            c = md5_ff(c, d, a, b, x[i + 2], 17, 606105819);
            b = md5_ff(b, c, d, a, x[i + 3], 22, -1044525330);
            a = md5_ff(a, b, c, d, x[i + 4], 7, -176418897);
            d = md5_ff(d, a, b, c, x[i + 5], 12, 1200080426);
            c = md5_ff(c, d, a, b, x[i + 6], 17, -1473231341);
            b = md5_ff(b, c, d, a, x[i + 7], 22, -45705983);
            a = md5_ff(a, b, c, d, x[i + 8], 7, 1770035416);
            d = md5_ff(d, a, b, c, x[i + 9], 12, -1958414417);
            c = md5_ff(c, d, a, b, x[i + 10], 17, -42063);
            b = md5_ff(b, c, d, a, x[i + 11], 22, -1990404162);
            a = md5_ff(a, b, c, d, x[i + 12], 7, 1804603682);
            d = md5_ff(d, a, b, c, x[i + 13], 12, -40341101);
            c = md5_ff(c, d, a, b, x[i + 14], 17, -1502002290);
            b = md5_ff(b, c, d, a, x[i + 15], 22, 1236535329);
            a = md5_gg(a, b, c, d, x[i + 1], 5, -165796510);
            d = md5_gg(d, a, b, c, x[i + 6], 9, -1069501632);
            c = md5_gg(c, d, a, b, x[i + 11], 14, 643717713);
            b = md5_gg(b, c, d, a, x[i + 0], 20, -373897302);
            a = md5_gg(a, b, c, d, x[i + 5], 5, -701558691);
            d = md5_gg(d, a, b, c, x[i + 10], 9, 38016083);
            c = md5_gg(c, d, a, b, x[i + 15], 14, -660478335);
            b = md5_gg(b, c, d, a, x[i + 4], 20, -405537848);
            a = md5_gg(a, b, c, d, x[i + 9], 5, 568446438);
            d = md5_gg(d, a, b, c, x[i + 14], 9, -1019803690);
            c = md5_gg(c, d, a, b, x[i + 3], 14, -187363961);
            b = md5_gg(b, c, d, a, x[i + 8], 20, 1163531501);
            a = md5_gg(a, b, c, d, x[i + 13], 5, -1444681467);
            d = md5_gg(d, a, b, c, x[i + 2], 9, -51403784);
            c = md5_gg(c, d, a, b, x[i + 7], 14, 1735328473);
            b = md5_gg(b, c, d, a, x[i + 12], 20, -1926607734);
            a = md5_hh(a, b, c, d, x[i + 5], 4, -378558);
            d = md5_hh(d, a, b, c, x[i + 8], 11, -2022574463);
            c = md5_hh(c, d, a, b, x[i + 11], 16, 1839030562);
            b = md5_hh(b, c, d, a, x[i + 14], 23, -35309556);
            a = md5_hh(a, b, c, d, x[i + 1], 4, -1530992060);
            d = md5_hh(d, a, b, c, x[i + 4], 11, 1272893353);
            c = md5_hh(c, d, a, b, x[i + 7], 16, -155497632);
            b = md5_hh(b, c, d, a, x[i + 10], 23, -1094730640);
            a = md5_hh(a, b, c, d, x[i + 13], 4, 681279174);
            d = md5_hh(d, a, b, c, x[i + 0], 11, -358537222);
            c = md5_hh(c, d, a, b, x[i + 3], 16, -722521979);
            b = md5_hh(b, c, d, a, x[i + 6], 23, 76029189);
            a = md5_hh(a, b, c, d, x[i + 9], 4, -640364487);
            d = md5_hh(d, a, b, c, x[i + 12], 11, -421815835);
            c = md5_hh(c, d, a, b, x[i + 15], 16, 530742520);
            b = md5_hh(b, c, d, a, x[i + 2], 23, -995338651);
            a = md5_ii(a, b, c, d, x[i + 0], 6, -198630844);
            d = md5_ii(d, a, b, c, x[i + 7], 10, 1126891415);
            c = md5_ii(c, d, a, b, x[i + 14], 15, -1416354905);
            b = md5_ii(b, c, d, a, x[i + 5], 21, -57434055);
            a = md5_ii(a, b, c, d, x[i + 12], 6, 1700485571);
            d = md5_ii(d, a, b, c, x[i + 3], 10, -1894986606);
            c = md5_ii(c, d, a, b, x[i + 10], 15, -1051523);
            b = md5_ii(b, c, d, a, x[i + 1], 21, -2054922799);
            a = md5_ii(a, b, c, d, x[i + 8], 6, 1873313359);
            d = md5_ii(d, a, b, c, x[i + 15], 10, -30611744);
            c = md5_ii(c, d, a, b, x[i + 6], 15, -1560198380);
            b = md5_ii(b, c, d, a, x[i + 13], 21, 1309151649);
            a = md5_ii(a, b, c, d, x[i + 4], 6, -145523070);
            d = md5_ii(d, a, b, c, x[i + 11], 10, -1120210379);
            c = md5_ii(c, d, a, b, x[i + 2], 15, 718787259);
            b = md5_ii(b, c, d, a, x[i + 9], 21, -343485551);

            a = safe_add(a, olda);
            b = safe_add(b, oldb);
            c = safe_add(c, oldc);
            d = safe_add(d, oldd);
        }
        return Array(a, b, c, d);

    }

    function md5_cmn(q, a, b, x, s, t) {
        return safe_add(bit_rol(safe_add(safe_add(a, q), safe_add(x, t)), s), b);
    }
    function md5_ff(a, b, c, d, x, s, t) {
        return md5_cmn((b & c) | ((~b) & d), a, b, x, s, t);
    }
    function md5_gg(a, b, c, d, x, s, t) {
        return md5_cmn((b & d) | (c & (~d)), a, b, x, s, t);
    }
    function md5_hh(a, b, c, d, x, s, t) {
        return md5_cmn(b ^ c ^ d, a, b, x, s, t);
    }
    function md5_ii(a, b, c, d, x, s, t) {
        return md5_cmn(c ^ (b | (~d)), a, b, x, s, t);
    }

    function core_hmac_md5(key, data) {
        var bkey = str2binl(key);
        if (bkey.length > 16) bkey = core_md5(bkey, key.length * chrsz);

        var ipad = Array(16), opad = Array(16);
        for (var i = 0; i < 16; i++) {
            ipad[i] = bkey[i] ^ 0x36363636;
            opad[i] = bkey[i] ^ 0x5C5C5C5C;
        }

        var hash = core_md5(ipad.concat(str2binl(data)), 512 + data.length * chrsz);
        return core_md5(opad.concat(hash), 512 + 128);
    }

    function safe_add(x, y) {
        var lsw = (x & 0xFFFF) + (y & 0xFFFF);
        var msw = (x >> 16) + (y >> 16) + (lsw >> 16);
        return (msw << 16) | (lsw & 0xFFFF);
    }

    function bit_rol(num, cnt) {
        return (num << cnt) | (num >>> (32 - cnt));
    }

    function str2binl(str) {
        var bin = Array();
        var mask = (1 << chrsz) - 1;
        for (var i = 0; i < str.length * chrsz; i += chrsz)
            bin[i >> 5] |= (str.charCodeAt(i / chrsz) & mask) << (i % 32);
        return bin;
    }

    function binl2hex(binarray) {
        var hex_tab = hexcase ? "0123456789ABCDEF" : "0123456789abcdef";
        var str = "";
        for (var i = 0; i < binarray.length * 4; i++) {
            str += hex_tab.charAt((binarray[i >> 2] >> ((i % 4) * 8 + 4)) & 0xF) +
			   hex_tab.charAt((binarray[i >> 2] >> ((i % 4) * 8)) & 0xF);
        }
        return str;
    }

    function binl2b64(binarray) {
        var tab = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
        var str = "";
        for (var i = 0; i < binarray.length * 4; i += 3) {
            var triplet = (((binarray[i >> 2] >> 8 * (i % 4)) & 0xFF) << 16)
					| (((binarray[i + 1 >> 2] >> 8 * ((i + 1) % 4)) & 0xFF) << 8)
					| ((binarray[i + 2 >> 2] >> 8 * ((i + 2) % 4)) & 0xFF);
            for (var j = 0; j < 4; j++) {
                if (i * 8 + j * 6 > binarray.length * 32) str += b64pad;
                else str += tab.charAt((triplet >> 6 * (3 - j)) & 0x3F);
            }
        }
        return str;
    }
</script>

2、服务端代码

SecuritySignHelper 帮助类

using System;
using System.Collections.Generic;
using System.Collections.Specialized;
using System.Security.Cryptography;
using System.Text;

namespace vxTalent.WebApi.Models.Helper
{
    public static class SecuritySignHelper
    {
        /// <summary>
        /// 登录账号  KEY
        /// </summary>
        public const string UserId = "UserId";
        /// <summary>
        /// 授权Token  KEY
        /// </summary>
        public const string Token = "Token";


        /// <summary>
        /// 获取防篡改签名，组织原始字符串的方式为：先get后post，该签名要求userId在加密时为全小写，同时该方法隐含要求parnter和token必须通过QueryString方式传递
        /// </summary>
        /// <param name="getCollection">通过QueryString方式传递的键值集合,如果内部包含parnter或者token，相关字段在组织原始字符串时将会被移除</param>
        /// <param name="userId">登录账号</param>
        /// <param name="partnerKey">权限Key</param>
        /// <param name="postCollection">通过Form方式传递的键值集合，如果包含parnter或者token，此部分不会被做特殊处理</param>
        /// <returns></returns>
        public static string GetSecuritySign(this NameValueCollection getCollection, string userId, string partnerKey, NameValueCollection postCollection = null)
        {
            if (string.IsNullOrWhiteSpace(userId) || string.IsNullOrWhiteSpace(partnerKey))
            {
                throw new ArgumentNullException();
            }
            var dic = GetSortedDictionary(getCollection,
                (k) => string.Equals(k, UserId, StringComparison.OrdinalIgnoreCase)
                       || string.Equals(k, Token, StringComparison.OrdinalIgnoreCase));
            dic.Add(UserId, userId);
            var tmp = new StringBuilder();
            FillStringBuilder(tmp, dic);//将QueryString填入StringBuilder
            dic = GetSortedDictionary(postCollection);
            FillStringBuilder(tmp, dic);//将Form填入StringBuilder
            tmp.Append(partnerKey);//在尾部添加key
            tmp.Remove(0, 1);//移除第一个&
            return tmp.ToString().GetMD5_32();//获取32位长度的Md5摘要,不区分大小写
        }
        private static SortedDictionary<string, string> GetSortedDictionary(NameValueCollection collection, Func<string, bool> filter = null)
        {//获取排序的键值对
            SortedDictionary<string, string> dic = new SortedDictionary<string, string>();
            if (collection != null && collection.Count > 0)
            {
                foreach (var k in collection.AllKeys)
                {
                    if (filter == null || !filter(k))
                    {//如果没设置过滤条件或者无需过滤
                        dic.Add(k, collection[k]);
                    }
                }
            }
            return dic;
        }
        private static void FillStringBuilder(StringBuilder builder, SortedDictionary<string, string> dic)
        {
            foreach (var kv in dic)
            {
                builder.Append('&');
                builder.Append(kv.Key);
                builder.Append('=');
                builder.Append(kv.Value);
            }//按key顺序组织字符串
        }

        /// <summary>
        /// 获取32位长度的Md5摘要
        /// </summary>
        /// <param name="inputStr"></param>
        /// <param name="encoding"></param>
        /// <returns></returns>
        public static string GetMD5_32(this string inputStr, Encoding encoding = null)
        {
            RefEncoding(ref encoding);
            byte[] data = GetMD5(inputStr, encoding);
            StringBuilder tmp = new StringBuilder();
            for (int i = 0; i < data.Length; i++)
            {
                tmp.Append(data[i].ToString("x2"));
            }
            return tmp.ToString();
        }
        private static byte[] GetMD5(string inputStr, Encoding encoding)
        {
            using (MD5 md5Hash = MD5.Create())
            {
                return md5Hash.ComputeHash(encoding.GetBytes(inputStr));
            }
        }
        private static void RefEncoding(ref Encoding encoding)
        {
            if (encoding == null)
            {
                encoding = Encoding.Default;
            }
        }
    }
}


抽象基类

using System;
using System.Web;
using System.Collections.Specialized;
using System.Net;
using System.Net.Http;
using System.Text.RegularExpressions;
using System.Web.Http.Controllers;
using System.Web.Http.Filters;
using vxTalent.WebApi.Models.Helper;

namespace vxTalent.WebApi.Models.Manage
{
    /// <summary>
    /// WebAPI防篡改签名验证抽象基类Attribute
    /// </summary>
    public abstract class AbsBaseAuthenticationAttribute : ActionFilterAttribute
    {
        /// <summary>
        /// Occurs before the action method is invoked.
        /// </summary>
        /// <param name="actionContext">The action context</param>
        public override void OnActionExecuting(HttpActionContext actionContext)
        {
            //获取Asp.Net对应的Request
            var request = ((HttpContextWrapper)actionContext.Request.Properties["MS_HttpContext"]).Request;
            NameValueCollection getCollection = request.QueryString;//此签名要求UserId及Token均通过QueryString传递
            if (request.FilePath.ToLower() == "/api/user/login")
            {//登录不用验证
                return;
            }
            if (getCollection != null && getCollection.Count > 0)
            {
                string userId = getCollection[SecuritySignHelper.UserId];
                
                string token = getCollection[SecuritySignHelper.Token];
                if (!string.IsNullOrWhiteSpace(userId)//必须包含userId
                   && !string.IsNullOrWhiteSpace(token)//必须包含token
                   && Regex.IsMatch(token, "^[0-9A-Za-z]{32}$"))//token必须为32位Md5摘要
                {
                    //获取userId对应的key
                    //这里暂时只做了合作key校验，不做访问权限校验，如有需要，此处可进行调整，建议RBAC
                    string returnstr="";
                    string partnerKey = this.GetTokeyKey(int.Parse(userId), ref returnstr);//数据库配置的Token
                    if (!string.IsNullOrWhiteSpace(returnstr))
                    {//token 过期或者不存在
                        actionContext.Response = actionContext.Request.CreateResponse(HttpStatusCode.ResetContent);
                        return;
                    }
                    if (!string.IsNullOrWhiteSpace(partnerKey))
                    {
                        NameValueCollection postCollection = null;
                        switch (request.RequestType.ToUpper())
                        {
                            case "GET":
                            case "DELETE": break;//只是为了同时显示restful四种方式才有这部分无意义代码
                            //实际该以哪种方式进行请求应遵循restful标准
                            case "POST":
                            case "PUT":
                                postCollection = request.Form;//post的数据必须通过application/x-www-form-urlencoded方式传递
                                break;
                            default:
                                throw new NotImplementedException();
                        }
                        //根据请求数据获取MD5签名
                        string vSign = getCollection.GetSecuritySign(userId, partnerKey, postCollection);
                        if (string.Equals(token, vSign, StringComparison.OrdinalIgnoreCase))
                        {//验证通过,执行基类方法
                            base.OnActionExecuting(actionContext);
                            return;
                        }
                        else
                        {//验证失败，返回消息
                            
                        }
                    }
                }
            }
            //此处暂时以401返回，可调整为其它返回
            actionContext.Response = actionContext.Request.CreateResponse(HttpStatusCode.Unauthorized);
            //actionContext.Response = new HttpResponseMessage(HttpStatusCode.Unauthorized);
        }

        /// <summary>
        /// 获取合作号对应的合作Key,如果未能获取，则返回空字符串或者null
        /// </summary>
        /// <param name="userId"></param>
        /// <param name="returnstr"></param>
        /// <returns></returns>
        protected abstract string GetTokeyKey(int userId, ref string returnstr);
    }
}

基类方法实例

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;

namespace vxTalent.WebApi.Models.Manage
{
    public class AuthenticationAttribute : AbsBaseAuthenticationAttribute
    {
        protected override string GetTokeyKey(int userId, ref string returnstr)
        {
            return new UserManage(userId).GetTokeyKey();
        }
    }
}

3、增强加密过程

为了增加加密，还可以加一个参数，保证加密的tokey每次的请求，都不一样。
加一个timestr(时间戳)把这个字符串放入到加密串中。

PS：这样在登录时返回的KEY，还是容易被别人拿到，于是想到的用手机设备上的UUID，作为KEY，不过这个KEY肯定要经过加密才能作为KEY，至于怎么加密，那是自己的事了。只是传个UUID，到服务端的时候，要用相同的加密算法就可以了。

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