AntiXSS，由微软推出的用于防止XSS攻击的一个类库，可实现输入白名单机制和输出转�?/span>
文章最后有antixx演示工程下载
antixss下载地址
aspx?id=5242">http://www.microsoft.com/download/en/details.aspx?id=5242
msi安装程序，安装之后，安装目录下有以下文件
AntiXSS.chm 包括类库的操作手册参数说�?/span>
HtmlSanitizationLibrary.dll 包含Sanitizer�?输入白名�?
AntiXSSLibrary.dll 包含Antixss，Encoder�?输出转义)
使用时在工程内添加引用HtmlSanitizationLibrary.dll 和AntiXSSLibrary.dll
导入命名空间using Microsoft.Security.Application;
1、输入白名单
调用Sanitizer.GetSafeHtmlFragment方法即可,url_c未过滤后的干净字串
url = Request.QueryString["url"];
url_c = Sanitizer.GetSafeHtmlFragment(url);
Response.Write(url_c);
2、输出转�?/span>
//HTML内容编码
html_cont = Encoder.HtmlEncode(url);
//html_cont = url;
//HTML属性编�?/span>
input1.Value = Encoder.HtmlAttributeEncode(url);
//input1.Value = url;
//对js进行编码
url_c = Encoder.JavaScriptEncode(url);
//url_c = url;
//URL编码
img1.Src = Encoder.UrlEncode(url);
//img1.Src = url;
XmlDocument xmlDoc;
XmlNodeList nodeList;
//XML属性编�?/span>
isbn = Encoder.XmlAttributeEncode(Request.QueryString["isbn"]);
if (isbn != null)
{
xmlDoc = new XmlDocument();
xmlDoc.Load(Server.MapPath("db.xml"));
nodeList = xmlDoc.SelectSingleNode("Employees").ChildNodes;
foreach (XmlNode xn in nodeList)
{
XmlElement xe = (XmlElement)xn;
if (xe.GetAttribute("genre") == "张三")
{
xe.SetAttribute("ISBN", isbn);
}
}
xmlDoc.Save(Server.MapPath("db.xml"));
}
//XML内容编码
price = Encoder.XmlEncode(Request.QueryString["price"]);
price = Request.QueryString["price"];
if (price != null)
{
xmlDoc = new XmlDocument();
xmlDoc.Load(Server.MapPath("db.xml"));
nodeList = xmlDoc.SelectSingleNode("Employees").ChildNodes;
foreach (XmlNode xn in nodeList)
{
XmlElement xe = (XmlElement)xn;
if (xe.GetAttribute("genre") == "张三")
{
XmlNodeList nls = xe.ChildNodes;
foreach (XmlNode xn1 in nls)
{
XmlElement xe2 = (XmlElement)xn1;
if (xe2.Name == "price")
{
xe2.InnerText = price;
}
}
}
}
xmlDoc.Save(Server.MapPath("db.xml"));
}
以下为表示层
<asp:Content ID="BodyContent" runat="server" ContentPlaceHolderID="MainContent">
<form action="" id="form1" method="post">
<table border="1">
<tr>
<td width="100">类型</td>
<td width="300">POC clickme</td>
<td width="500">result</td>
</tr>
<tr>
<td>HTML内容</td>
<td><a href="?url=%3Cscript%3Ealert(xss)%3C/script%3E" ><script>alert(xss)</script></a></td>
<td><pre id="h1" runat="server" ><%=html_cont %></pre></td>
</tr>
<tr>
<td>HTML属�?lt;/td>
<td><a href="?url=%22%20src=%22javascript:alert(xss)%22" >" src="javascript:alert(xss)"</a></td>
<td><input id="input1" runat="server"/></td>
</tr>
<tr>
<td>js</td>
<td><a href="?url=test;alert(1);">test;alert(1);</td>
<td>
<script type="text/javascript">
var url = <%=url_c %>;
</script>
</td>
</tr>
<tr>
<td>URL</td>
<td><a href="?url=javascript:alert(xss)" >javascript:alert(xss)</a></td>
<td><img id="img1" runat="server" alt="img1" /></td>
</tr>
<tr>
<td>XML属性编�?lt;/td>
<td><a href="?isbn=2-3631-4" >isbn=2-3631-4</a></td>
<td><%=isbn %></td>
</tr>
<tr>
<td>XML内容编码www.2cto.com</td>
<td><a href="?price=90" >price=90</a></td>
<td><%=price %></td>
</tr>
</table>
</form>
</asp:Content>
