public static void Check(HttpApplication application, SQLInjectionParam param)
{
HttpContext context = application.Context;
HttpRequest request = context.Request;
string file = "";
#region 记录日志文件
if (param.SQLInjectionType % 2 == 1) //记录到日志
{
try
{
file = context.Server.MapPath(param.SQLInjectionLogFile);
FileInfo fi = new FileInfo(file);
if (!fi.Exists)
{
Directory.CreateDirectory(fi.DirectoryName);
}
}
catch
{
}
}
#endregion
// -----------------------防 Post 注入-----------------------
if (request.Form != null)
{
for (int k = 0; k < request.Form.Count; k++)
{
string getsqlkey = request.Form.Keys[k];
string formValue = request.Form[getsqlkey].ToLower();
Find(request, getsqlkey, formValue, (int)CheckItem.form, param.SQLInjectionLevel, param.SQLInjectionType, file);
}
}
// -----------------------防 GET 注入-----------------------
if (request.QueryString != null)
{
for (int k = 0; k < request.QueryString.Count; k++)
{
string getsqlkey = request.QueryString.Keys[k];
string queryValue = request.QueryString[getsqlkey].ToLower();
Find(request, getsqlkey, queryValue, (int)CheckItem.query, param.SQLInjectionLevel, param.SQLInjectionType, file);
}
}
// -----------------------防 Cookies 注入-----------------------
if (request.Cookies != null)
{
for (int k = 0; k < request.Cookies.Count; k++)
{
string getsqlkey = request.Cookies.Keys[k];
string cookieValue = request.Cookies[getsqlkey].Value.ToLower();
Find(request, getsqlkey, cookieValue, (int)CheckItem.cookie, param.SQLInjectionLevel, param.SQLInjectionType, file);
}
}
}
void application_BeginRequest(object sender, EventArgs e)
{
HttpApplication application = (HttpApplication)sender;
try
{
SQLInjectionParam param = new SQLInjectionParam();
if (ConfigurationManager.AppSettings.Count > 0)
{
string enableStr = ConfigurationManager.AppSettings["SQLInjectionEnable"]; //是否启用
if (enableStr!= null)
{
if (enableStr.ToLower() == "false" || enableStr.ToLower() == "0")
{
param.SQLInjectionEnable = false;
}
}
param.SQLInjectionLevel = ConvertToInt(ConfigurationManager.AppSettings["SQLInjectionLevel"]); //过滤等级
param.SQLInjection = ConfigurationManager.AppSettings["SQLInjection"]; //追加的过滤关键词
param.SQLInjectionType = ConvertToInt(ConfigurationManager.AppSettings["SQLInjectionType"]); //过滤方法
string logFileName = ConfigurationManager.AppSettings["SQLInjectionLogFile"]; //日志记录文件
if (!string.IsNullOrEmpty(logFileName))
{
param.SQLInjectionLogFile = logFileName;
}
}
if (param.SQLInjectionEnable)
{
CheckSQLReg.Check(application, param);
CheckSQL.Check(application,param);
}
}
catch(Exception ex)
{
}
}
public static void Check(HttpApplication application, SQLInjectionParam param )
{
HttpContext context = application.Context;
HttpRequest request = context.Request;
string sqlkeywords = "select↓insert↓update↓delete↓drop↓create↓truncate↓join↓declare↓exists↓union↓order↓exec↓execute↓alter↓mid↓xp_cmdshell↓char↓sp_oacreate↓wscript.shell↓xp_regwrite↓waitfor↓delay";
string file = "";
if (!string.IsNullOrEmpty(param.SQLInjection))
{
if (param.SQLInjection.StartsWith("↓"))
{
sqlkeywords += param.SQLInjection;
}
else
{
sqlkeywords += "↓" + param.SQLInjection;
}
}
#region 记录日志文件
if (param.SQLInjectionType % 2 == 1) //记录到日志
{
try
{
file = context.Server.MapPath(param.SQLInjectionLogFile);
FileInfo fi = new FileInfo(file);
if (!fi.Exists)
{
Directory.CreateDirectory(fi.DirectoryName);
}
}
catch
{
}
}
#endregion
//Stopwatch watch = new Stopwatch();
//watch.Start();
string[] sqlkeyword = sqlkeywords.Split('↓');
foreach (string keyword in sqlkeyword)
{
// -----------------------防 Post 注入-----------------------
if (request.Form!= null)
{
for (int k = 0; k <request.Form.Count; k++)
{
string getsqlkey = request.Form.Keys[k];
string formValue= request.Form[getsqlkey].ToLower();
string getip = Find(request, keyword, getsqlkey, formValue, (int)CheckItem.form, param.SQLInjectionLevel, param.SQLInjectionType, file);
}
}
// -----------------------防 GET 注入-----------------------
if (request.QueryString != null)
{
for (int k = 0; k <request.QueryString.Count; k++)
{
string getsqlkey = request.QueryString.Keys[k];
string queryValue=request.QueryString[getsqlkey].ToLower();
string getip = Find(request, keyword, getsqlkey, queryValue, (int)CheckItem.query, param.SQLInjectionLevel, param.SQLInjectionType, file);
}
}
// -----------------------防 Cookies 注入-----------------------
if (request.Cookies != null)
{
for (int k = 0; k < request.Cookies.Count; k++)
{
string getsqlkey = request.Cookies.Keys[k];
string cookieValue=request.Cookies[getsqlkey].Value.ToLower();
string getip = Find(request, keyword, getsqlkey, cookieValue, (int)CheckItem.cookie, param.SQLInjectionLevel, param.SQLInjectionType, file);
}
}
}
//watch.Stop();
//TimeSpan ts = watch.Elapsed;
//string elapsedTime = String.Format("{0:00}:{1:00}:{2:00}.{3:00}",
// ts.Hours, ts.Minutes, ts.Seconds,
// ts.Milliseconds / 10);
//System.Web.HttpContext.Current.Response.Write(elapsedTime);
//System.Web.HttpContext.Current.Response.End();
}