.net 过滤 sql防注入类，省地以后每次都要重新弄！

/// <summary>
    /// 过滤不安全的字符串
    /// </summary>
    /// <param name="Str"></param>
    /// <returns></returns>
    public static string FilteSQLStr(string Str)
    {

Str = Str.Replace("‘", "");
        Str = Str.Replace("\"", "");
        Str = Str.Replace("&", "&amp");
        Str = Str.Replace("<", "&lt");
        Str = Str.Replace(">", "&gt");

Str = Str.Replace("delete", "");
        Str = Str.Replace("update", "");
        Str = Str.Replace("insert", "");

return Str;
    }

2.

#region 过滤 Sql 语句字符串中的注入脚本
        /// <summary>
        /// 过滤 Sql 语句字符串中的注入脚本
        /// </summary>
        /// <param name="source">传入的字符串</param>
        /// <returns>过滤后的字符串</returns>
        public static string SqlFilter(string source)
        {
            //单引号替换成两个单引号
            source = source.Replace("‘", "‘‘");

//半角封号替换为全角封号，防止多语句执行
            source = source.Replace(";", "；");

//半角括号替换为全角括号
            source = source.Replace("(", "（");
            source = source.Replace(")", "）");

///////////////要用正则表达式替换，防止字母大小写得情况////////////////////

//去除执行存储过程的命令关键字
            source = source.Replace("Exec", "");
            source = source.Replace("Execute", "");

//去除系统存储过程或扩展存储过程关键字
            source = source.Replace("xp_", "x p_");
            source = source.Replace("sp_", "s p_");

//防止16进制注入
            source = source.Replace("0x", "0 x");

return source;
        }
        #endregion

3.

/// 过滤SQL字符。
        /// </summary>
        /// <param name="str">要过滤SQL字符的字符串。</param>
        /// <returns>已过滤掉SQL字符的字符串。</returns>
        public static string ReplaceSQLChar(string str)
        {
            if (str == String.Empty)
                return String.Empty; str = str.Replace("‘", "‘");
            str = str.Replace(";", "；");
            str = str.Replace(",", ",");
            str = str.Replace("?", "?");
            str = str.Replace("<", "＜");
            str = str.Replace(">", "＞");
            str = str.Replace("(", "(");
            str = str.Replace(")", ")");
            str = str.Replace("@", "＠");
            str = str.Replace("=", "＝");
            str = str.Replace("+", "＋");
            str = str.Replace("*", "＊");
            str = str.Replace("&", "＆");
            str = str.Replace("#", "＃");
            str = str.Replace("%", "％");
            str = str.Replace("$", "￥");

return str;
        }
4.

/// <summary>
/// 过滤标记
/// </summary>
/// <param name="NoHTML">包括HTML，脚本，数据库关键字，特殊字符的源码 </param>
/// <returns>已经去除标记后的文字</returns>
public string NoHtml(string Htmlstring)
{
    if (Htmlstring == null)
    {
        return "";
    }
    else
    {
        //删除脚本
         Htmlstring = Regex.Replace(Htmlstring, @"<script[^>]*?>.*?</script>", "", RegexOptions.IgnoreCase);
        //删除HTML
        Htmlstring = Regex.Replace(Htmlstring, @"<(.[^>]*)>", "", RegexOptions.IgnoreCase);
        Htmlstring = Regex.Replace(Htmlstring, @"([\r\n])[\s]+", "", RegexOptions.IgnoreCase);
        Htmlstring = Regex.Replace(Htmlstring, @"-->", "", RegexOptions.IgnoreCase);
        Htmlstring = Regex.Replace(Htmlstring, @"<!--.*", "", RegexOptions.IgnoreCase);
        Htmlstring = Regex.Replace(Htmlstring, @"&(quot|#34);", "\"", RegexOptions.IgnoreCase);
        Htmlstring = Regex.Replace(Htmlstring, @"&(amp|#38);", "&", RegexOptions.IgnoreCase);
        Htmlstring = Regex.Replace(Htmlstring, @"&(lt|#60);", "<", RegexOptions.IgnoreCase);
        Htmlstring = Regex.Replace(Htmlstring, @"&(gt|#62);", ">", RegexOptions.IgnoreCase);
        Htmlstring = Regex.Replace(Htmlstring, @"&(nbsp|#160);", " ", RegexOptions.IgnoreCase);
        Htmlstring = Regex.Replace(Htmlstring, @"&(iexcl|#161);", "\xa1", RegexOptions.IgnoreCase);
        Htmlstring = Regex.Replace(Htmlstring, @"&(cent|#162);", "\xa2", RegexOptions.IgnoreCase);
        Htmlstring = Regex.Replace(Htmlstring, @"&(pound|#163);", "\xa3", RegexOptions.IgnoreCase);
        Htmlstring = Regex.Replace(Htmlstring, @"&(copy|#169);", "\xa9", RegexOptions.IgnoreCase);
        Htmlstring = Regex.Replace(Htmlstring, @"&#(\d+);", "", RegexOptions.IgnoreCase);
        Htmlstring = Regex.Replace(Htmlstring, "xp_cmdshell", "", RegexOptions.IgnoreCase);

//删除与数据库相关的词
         Htmlstring = Regex.Replace(Htmlstring, "select", "", RegexOptions.IgnoreCase);
        Htmlstring = Regex.Replace(Htmlstring, "insert", "", RegexOptions.IgnoreCase);
        Htmlstring = Regex.Replace(Htmlstring, "delete from", "", RegexOptions.IgnoreCase);
        Htmlstring = Regex.Replace(Htmlstring, "count‘‘", "", RegexOptions.IgnoreCase);
        Htmlstring = Regex.Replace(Htmlstring, "drop table", "", RegexOptions.IgnoreCase);
        Htmlstring = Regex.Replace(Htmlstring, "truncate", "", RegexOptions.IgnoreCase);
        Htmlstring = Regex.Replace(Htmlstring, "asc", "", RegexOptions.IgnoreCase);
        Htmlstring = Regex.Replace(Htmlstring, "mid", "", RegexOptions.IgnoreCase);
        Htmlstring = Regex.Replace(Htmlstring, "char", "", RegexOptions.IgnoreCase);
        Htmlstring = Regex.Replace(Htmlstring, "xp_cmdshell", "", RegexOptions.IgnoreCase);
        Htmlstring = Regex.Replace(Htmlstring, "exec master", "", RegexOptions.IgnoreCase);
        Htmlstring = Regex.Replace(Htmlstring, "net localgroup administrators", "", RegexOptions.IgnoreCase);
        Htmlstring = Regex.Replace(Htmlstring, "and", "", RegexOptions.IgnoreCase);
        Htmlstring = Regex.Replace(Htmlstring, "net user", "", RegexOptions.IgnoreCase);
        Htmlstring = Regex.Replace(Htmlstring, "or", "", RegexOptions.IgnoreCase);
        Htmlstring = Regex.Replace(Htmlstring, "net", "", RegexOptions.IgnoreCase);
        //Htmlstring = Regex.Replace(Htmlstring, "*", "", RegexOptions.IgnoreCase);
        Htmlstring = Regex.Replace(Htmlstring, "-", "", RegexOptions.IgnoreCase);
        Htmlstring = Regex.Replace(Htmlstring, "delete", "", RegexOptions.IgnoreCase);
        Htmlstring = Regex.Replace(Htmlstring, "drop", "", RegexOptions.IgnoreCase);
        Htmlstring = Regex.Replace(Htmlstring, "script", "", RegexOptions.IgnoreCase);

//特殊的字符
         Htmlstring = Htmlstring.Replace("<", "");
        Htmlstring = Htmlstring.Replace(">", "");
        Htmlstring = Htmlstring.Replace("*", "");
        Htmlstring = Htmlstring.Replace("-", "");
        Htmlstring = Htmlstring.Replace("?", "");
        Htmlstring = Htmlstring.Replace("‘", "‘‘");
        Htmlstring = Htmlstring.Replace(",", "");
        Htmlstring = Htmlstring.Replace("/", "");
        Htmlstring = Htmlstring.Replace(";", "");
        Htmlstring = Htmlstring.Replace("*/", "");
        Htmlstring = Htmlstring.Replace("\r\n", "");
        Htmlstring = HttpContext.Current.Server.HtmlEncode(Htmlstring).Trim();

return Htmlstring;
   }
}

5.

public static bool CheckBadWord(string str)
{
string pattern = @"select|insert|delete|from|count\(|drop table|update|truncate|asc\(|mid\(|char\(|xp_cmdshell|exec   master|netlocalgroup administrators|net user|or|and";
if (Regex.IsMatch(str, pattern, RegexOptions.IgnoreCase))
return true;
return false;
}
public static string Filter(string str)
{
string[] pattern ={ "select", "insert", "delete", "from", "count\\(", "drop table", "update", "truncate", "asc\\(", "mid\\(", "char\\(", "xp_cmdshell", "exec   master", "netlocalgroup administrators", "net user", "or", "and" };
for (int i = 0; i < pattern.Length; i++)
{
str = str.Replace(pattern[i].ToString(), "");
}
return str;
}

时间： 2024-08-05 15:22:15

.net 过滤 sql防注入类，省地以后每次都要重新弄！的相关文章

简单实用的PHP防注入类实例

这篇文章主要介绍了简单实用的PHP防注入类实例,以两个简单的防注入类为例介绍了PHP防注入的原理与技巧,对网站安全建设来说非常具有实用价值,需要的朋友可以参考下 本文实例讲述了简单实用的PHP防注入类.分享给大家供大家参考.具体如下: PHP防注入注意要过滤的信息基本是get,post,然后对于sql就是我们常用的查询,插入等等sql命令了,下面我给各位整理两个简单的例子,希望这些例子能给你网站带来安全. PHP防注入类代码如下: 复制代码 代码如下: <?php /**  * 参数处理类  *

sql 防注入 维基百科

http://zh.wikipedia.org/wiki/SQL%E8%B3%87%E6%96%99%E9%9A%B1%E7%A2%BC%E6%94%BB%E6%93%8A SQL攻击(SQL injection,台湾称作SQL资料隐码攻击),简称注入攻击,是发生于应用程序之数据库层的安全漏洞.简而言之,是在输入的字符串之中注入SQL指令,在设计不良的程序当中忽略了检查,那么这些注入进去的指令就会被数据库服务器误认为是正常的SQL指令而运行,因此遭到破坏. 有部份人认为SQL注入攻击是只针对Mi

ASPSecurity SQL 防注入

<% '************** ASPSecurity SQL 防注入************** ' Copyright 2006 ' Create:2006-4-06 ' Update:2006-6-01 '*************************************************** If Request.Form<>"" Then StopInjection(Request.Form) If Request.QueryString

php sql防注入

没有太多的过滤,主要是针对php和mysql的组合.一般性的防注入,只要使用php的 addslashes 函数就可以了. 以下是一段copy来的代码: PHP代码 $_POST = sql_injection($_POST); $_GET = sql_injection($_GET); function sql_injection($content) { if (!get_magic_quotes_gpc()) { if (is_array($content)) { foreach ($con

ajax 全局拦载处理，可加密、过滤、筛选、sql防注入处理

//此方法放在公用的js里面即可.如此:所有的ajax请求都会通过此 $.ajaxSetup({ contentType: "application/x-www-form-urlencoded;charset=utf-8", beforeSend: function() { //发送前执行的函数 try { var params = arguments[1].data; //arguments是一个两个值的数组分别是0和1 re = /select|update|delete|trun

.net sql 防注入 httpmodule

1 新建一个类,实现IHttpModule接口 using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.UI; using System.Web.UI.WebControls; using System.Text; namespace DotNet.Common.WebForm { /// <summary> /// 简单防止sql注入 /// &

Request参数批量过滤，防注入（逐步完善中...）

来公司没有多久,检查了之前程序员写的代码,有些乱,很多Request没有验证. 尝试写了一个通用的Sql过滤的函数放OnInit,临时用下,不讲究效率,仅应急使用. /// <summary> /// 检查请求参数是否安全 /// </summary> /// <returns>有注入危险的请求参数</returns> public string CheckRequstSafe() { string sErrPara = ""; fore

360提供的SQL防注入

<?php class sqlsafe { private $getfilter = "'|(and|or)\\b.+?(>|<|=|in|like)|\\/\\*.+?\\*\\/|<\\s*script\\b|\\bEXEC\\b|UNION.+?SELECT|UPDATE.+?SET|INSERT\\s+INTO.+?VALUES|(SELECT|DELETE).+?FROM|(CREATE|ALTER|DROP|TRUNCATE)\\s+(TABLE|DATABA

最新天猫3轮面试题目：虚拟机+并发锁+Sql防注入+Zookeeper

天猫一面 自我介绍.项目介绍 Spring拦截器.实现了哪些方法?底层原理 AOP如何配置,底层原理.2种动态代理,aop注解实现,xml定义切面 Bean的作用域,单例模式是否线程安全?恶汉模式是否线程安全?bean如何结束生命周期? Spring事务种类,如何回滚,A方法调用B方法,在B方法中出现异常,会回滚吗?(动态代理) 快速排序时间复杂度 JVM内存结构详细分配,各比例是多少 讲讲dubbo,数据库主从复制,2个节点读写分离,如何在读节点马上读到主节点写入的值 springboot和s