.net 防止sql注入

 public class SqlCheck  
{  
    public SqlCheck()  
    {  
        //  
        // TODO: 在此处添加构造函数逻辑  
        //     
    }  
 
      
    public SqlConnection oconn()  
    {  
        SqlConnection conn = new SqlConnection();  
        conn.ConnectionString = ConfigurationManager.ConnectionStrings["StudyConnectionString"].ToString();  
        //第1种调用的方法   JK1986_CheckSql();  
        JK1986_CheckSql();  
        if ( conn.State == ConnectionState.Closed  )   
        {  
            conn.Open();  
        }  
        return conn;  
    }  
 
 
    public DataTable  getsource(string getds)   
    {  
        SqlConnection conn = oconn();  
        SqlDataAdapter da = new SqlDataAdapter(getds, conn);  
        DataSet ds = new DataSet();  
        da.Fill(ds,"news" );  
        return ds.Tables["news"];  
    }  
      
 
    public static  void JK1986_CheckSql()  
    {  
        string jk1986_sql = "exec↓select↓drop↓alter↓exists↓union↓and↓or↓xor↓order↓mid↓asc↓execute↓xp_cmdshell↓insert↓update↓delete↓join↓declare↓char↓sp_oacreate↓wscript.shell↓xp_regwrite↓'↓;↓--";  
        string[] jk_sql = jk1986_sql.Split('↓');  
        foreach (string jk in jk_sql)  
        {  
            // -----------------------防 Post 注入-----------------------  
            if ( System.Web.HttpContext.Current.Request.Form != null)  
            {  
                for (int k = 0; k < System.Web.HttpContext.Current.Request.Form.Count; k++)  
                {  
                    string getsqlkey = System.Web.HttpContext.Current.Request.Form.Keys[k];  
                    string getip;  
                    if (System.Web.HttpContext.Current.Request.Form[getsqlkey].ToLower().Contains(jk) == true)  
                    {  
                       System.Web.HttpContext.Current.Response.Write("<script Language=JavaScript>alert('ASP.NET( C#版本 )防注入程序提示您，请勿提交非法字符！↓\\n\\nBlog:http://hi.baidu.com/ahhacker86\\n\\nBy:aa && JK1986');</" + "script>");  
                       System.Web.HttpContext.Current.Response.Write("非法操作！系统做了如下记录 ↓" + "<br>");  
                       if (System.Web.HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"] != null)  
                        {  
                            getip = System.Web.HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"];  
                        }  
                        else 
                        {  
                            getip = System.Web.HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"];  
                        }  
                        System.Web.HttpContext.Current.Response.Write("操 作 I  P ：" + getip + "<br>");  
                        System.Web.HttpContext.Current.Response.Write("操 作 时 间：" + DateTime.Now.ToString() + "<br>");  
                        System.Web.HttpContext.Current.Response.Write("操 作 页 面：" + System.Web.HttpContext.Current.Request.ServerVariables["URL"] + "<br>");  
                        System.Web.HttpContext.Current.Response.Write("提 交 方 式：P O S T " + "<br>");  
                        System.Web.HttpContext.Current.Response.Write("提 交 参 数：" + jk + "<br>");  
                        System.Web.HttpContext.Current.Response.Write("提 交 数 据：" + System.Web.HttpContext.Current.Request.Form[getsqlkey].ToLower() + "<br>");  
                        System.Web.HttpContext.Current.Response.End();  
                    }  
                }  
            }  
            // -----------------------防 GET 注入-----------------------  
            if (System.Web.HttpContext.Current.Request.QueryString != null)  
            {  
                for (int k = 0; k < System.Web.HttpContext.Current.Request.QueryString.Count; k++)  
                {  
                    string getsqlkey = System.Web.HttpContext.Current.Request.QueryString.Keys[k];  
                    string getip;  
                    if (System.Web.HttpContext.Current.Request.QueryString[getsqlkey].ToLower().Contains(jk) == true)  
                    {  
                        System.Web.HttpContext.Current.Response.Write("<script Language=JavaScript>alert('ASP.NET( C#版本 )防注入程序提示您，请勿提交非法字符！↓\\n\\nBlog:http://hi.baidu.com/ahhacker86\\n\\nBy:aa && JK1986');</" + "script>");  
                        System.Web.HttpContext.Current.Response.Write("非法操作！系统做了如下记录 ↓" + "<br>");  
                        if (System.Web.HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"] != null)  
                        {  
                            getip = System.Web.HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"];  
                        }  
                        else 
                        {  
                            getip = System.Web.HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"];  
                        }  
                        System.Web.HttpContext.Current.Response.Write("操 作 I  P ：" + getip + "<br>");  
                        System.Web.HttpContext.Current.Response.Write("操 作 时 间：" + DateTime.Now.ToString() + "<br>");  
                        System.Web.HttpContext.Current.Response.Write("操 作 页 面：" + System.Web.HttpContext.Current.Request.ServerVariables["URL"] + "<br>");  
                        System.Web.HttpContext.Current.Response.Write("提 交 方 式：G E T " + "<br>");  
                        System.Web.HttpContext.Current.Response.Write("提 交 参 数：" + jk + "<br>");  
                        System.Web.HttpContext.Current.Response.Write("提 交 数 据：" + System.Web.HttpContext.Current.Request.QueryString[getsqlkey].ToLower() + "<br>");  
                        System.Web.HttpContext.Current.Response.End();  
                    }  
                }  
            }  
 
            // -----------------------防 Cookies 注入-----------------------  
            if (System.Web.HttpContext.Current.Request.Cookies != null)  
            {  
                for (int k = 0; k < System.Web.HttpContext.Current.Request.Cookies.Count; k++)  
                {  
                    string getsqlkey = System.Web.HttpContext.Current.Request.Cookies.Keys[k];  
                    string getip;  
                    if (System.Web.HttpContext.Current.Request.Cookies[getsqlkey].Value.ToLower().Contains(jk) == true)  
                    {  
                        System.Web.HttpContext.Current.Response.Write("<script Language=JavaScript>alert('ASP.NET( C#版本 )防注入程序提示您，请勿提交非法字符！↓\\n\\nBlog:http://hi.baidu.com/ahhacker86\\n\\nBy:aa && JK1986');</" + "script>");  
                        System.Web.HttpContext.Current.Response.Write("非法操作！系统做了如下记录 ↓" + "<br>");  
                        if (System.Web.HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"] != null)  
                        {  
                            getip = System.Web.HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"];  
                        }  
                        else 
                        {  
                            getip = System.Web.HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"];  
                        }  
                        System.Web.HttpContext.Current.Response.Write("操 作 I  P ：" + getip + "<br>");  
                        System.Web.HttpContext.Current.Response.Write("操 作 时 间：" + DateTime.Now.ToString() + "<br>");  
                        System.Web.HttpContext.Current.Response.Write("操 作 页 面：" + System.Web.HttpContext.Current.Request.ServerVariables["URL"] + "<br>");  
                        System.Web.HttpContext.Current.Response.Write("提 交 方 式： Cookies " + "<br>");  
                        System.Web.HttpContext.Current.Response.Write("提 交 参 数：" + jk + "<br>");  
                        System.Web.HttpContext.Current.Response.Write("提 交 数 据：" + System.Web.HttpContext.Current.Request.Cookies[getsqlkey].Value.ToLower() + "<br>");  
                        System.Web.HttpContext.Current.Response.End();  
                    }  
                }  
            }  
 
        }  
    }       
      
}

 

 

来源于：www.hackbadboy.com B.B.S.T 信息安全团队 BadBoy网络安全小组