网站安全通用防护代码（用户读写数据库对用户输入或者发送（Post、Get）数据等进行检测过滤等）...

绝地灬酷狼 2022-04-24 04:58 193阅读 0赞

# [网站安全通用防护代码（用户读写数据库对用户输入或者发送（Post、Get）数据等进行检测过滤等）][Post_Get] #

每一个开发者都会意识到，网站发布之前，需要进行安全及系统漏洞检查。

那么如何拦截攻击者注入恶意脚本或代码？如何防御诸如跨站脚本攻击（XSS）、SQL注入攻击等恶意攻击行为？

针对目前常见的一些安全问题，结合目前一些常见的防护办法，可在系统底层增加了安全防护代码。

[Description("网站安全通用防护代码（用户读写数据库对用户输入或者发送（Post、Get）数据等进行检测过滤等）,跨站脚本攻击（XSS）、SQL注入攻击等恶意攻击")]
        public partial class SafeUtils
        {
    
            //正则过滤字符
            private const string StrRegex = @"<[^>]+?style=[\w]+?:expression\(|\b(alert|confirm|prompt)\b|^\+/v(8|9)|<[^>]*?=[^>]*?&#[^>]*?>|\b(and|or)\b.{1,6}?(=|>|<|\bin\b|\blike\b)|/\*.+?\*/|<\s*script\b|<\s*img\b|\bEXEC\b|UNION.+?SELECT|UPDATE.+?SET|INSERT\s+INTO.+?VALUES|(SELECT|DELETE).+?FROM|(CREATE|ALTER|DROP|TRUNCATE)\s+(TABLE|DATABASE)";
           
            /// <summary>
            ///  POST请求
            /// </summary>
            /// <param name="putData">输出非法字符串</param>
            /// <returns></returns>
            public static bool PostData(out string putData)
            {
                bool result = false;
                putData = string.Empty;
                for (int i = 0; i < HttpContext.Current.Request.Form.Count; i++)
                {
                    result = CheckData(HttpContext.Current.Request.Form[i].ToString(), out putData);
                    if (result)
                    {
                        putData = HttpContext.Current.Request.Form[i].ToString();
                        break;
                    }
                }
                return result;
            }
    
    
            /// <summary>
            /// GET请求
            /// </summary>
            /// <param name="putData">输出非法字符串</param>
            /// <returns></returns>
            public static bool GetData(out string putData)
            {
                bool result = false;
                putData = string.Empty;
                for (int i = 0; i < HttpContext.Current.Request.QueryString.Count; i++)
                {
                    result = CheckData(HttpContext.Current.Request.QueryString[i].ToString(), out putData);
                    if (result)
                    {
                        putData = HttpContext.Current.Request.QueryString[i].ToString();
                        break;
                    }
                }
                return result;
            }
    
            /// <summary>
            /// COOKIE数据
            /// </summary>
            /// <param name="putData">输出非法字符串</param>
            /// <returns></returns>
            public static bool CookieData(out string putData)
            {
                bool result = false;
                putData = string.Empty;
                for (int i = 0; i < HttpContext.Current.Request.Cookies.Count; i++)
                {
                    result = CheckData(HttpContext.Current.Request.Cookies[i].Value.ToLower(), out putData);
                    if (result)
                    {
                        putData = HttpContext.Current.Request.Cookies[i].Value.ToLower();
                        break;
                    }
                }
                return result;
    
            }
    
    
            /// <summary>
            /// UrlReferrer请求来源
            /// </summary>
            /// <param name="putData">输出非法字符串</param>
            /// <returns></returns>
            public static bool Referer(out string putData)
            {
                bool result = false;
                result = CheckData(HttpContext.Current.Request.UrlReferrer.ToString(), out putData);
                if (result)
                {
                    putData = HttpContext.Current.Request.UrlReferrer.ToString();
                }
                return result;
            }
    
    
            /// <summary>
            /// 正则检查
            /// </summary>
            /// <param name="inputData">字符串</param>
            /// <param name="putData">输出非法字符串</param>
            /// <returns></returns>
            public static bool CheckData(string inputData, out string putData)
            {
                putData = string.Empty;
                //if (Regex.IsMatch(inputData.ToUpper(), StrRegex.ToUpper(),RegexOptions.IgnoreCase))
                if (Regex.IsMatch(inputData, StrRegex, RegexOptions.IgnoreCase))  //忽略大小写
                {
                    putData = inputData;
                    return true;
                }
                else
                {
                    return false;
                }
            }
        
    
        }

posted @ 2019-01-17 13:04 [波霸38][38] 阅读( ...) 评论( ...) [编辑][Link 1] 收藏

[Post_Get]: https://www.cnblogs.com/sharing1986687846/p/10281676.html
[38]: https://www.cnblogs.com/sharing1986687846/
[Link 1]: https://i.cnblogs.com/EditPosts.aspx?postid=10281676