系统安全问题
最近在处理项目中的安全问题,特别是Safe_SQL Injection的问题,所有在网上找了一下,记录一下。
/// <summary>
/// 创建SQL注入的类
/// </summary>
public class Safe_SQL Injection
{
private const string StrRegex = @"\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)";
public static bool PostData()
{
bool result = false;
for (int i = 0; i < HttpContext.Current.Request.Form.Count; i++)
{
result = CheckData(HttpContext.Current.Request.Form[i].ToString());
if (result)
{
break;
}
}
return result;
}
public static bool GetData()
{
bool result = false;
for (int i = 0; i < HttpContext.Current.Request.QueryString.Count; i++)
{
result = CheckData(HttpContext.Current.Request.QueryString[i].ToString());
if (result)
{
break;
}
}
return result;
}
public static bool CookieData()
{
bool result = false;
for (int i = 0; i < HttpContext.Current.Request.Cookies.Count; i++)
{
result = CheckData(HttpContext.Current.Request.Cookies[i].Value.ToLower());
if (result)
{
break;
}
}
return result;
}
public static bool referer()
{
bool result = false;
return result = CheckData(HttpContext.Current.Request.UrlReferrer.ToString());
}
public static bool CheckData(string inputData)
{
if (Regex.IsMatch(inputData, StrRegex))
{
return true;
}
else
{
return false;
}
}
}
/// <summary>
/// 在Global中调用
/// </summary>
protected void Application_BeginRequest(Object sender, EventArgs e)
{
if (Request.Cookies != null)
{
if (Safe_SQL Injection.CookieData())
{
Response.Write("您提交的Cookie数据有恶意字符!");
Response.End();
}
}
if (Request.UrlReferrer != null)
{
if (Safe_SQL Injection.referer())
{
Response.Write("您提交的Referrer数据有恶意字符!");
Response.End();
}
}
if (Request.RequestType.ToUpper() == "POST")
{
if (Safe_SQL Injection.PostData())
{
Response.Write("您提交的Post数据有恶意字符!");
Response.End();
}
}
if (Request.RequestType.ToUpper() == "GET")
{
if (Safe_SQL Injection.GetData())
{
Response.Write("您提交的Get数据有恶意字符!");
Response.End();
}
}
}