.net如何防御csrf攻击

在.net项目中防御csrf攻击的方法

1首先，在.net项目添加以下代码；

<% using (Html.BeginForm("Login", "Admin", FormMethod.Post))

{ %>

<%=Html.AntiForgeryToken() %>

<%= Html.ValidationSummary(true, "登录不成功。请更正错误并重试。") %>

<div>

<fieldset>

<legend>帐户信息</legend>

<div class="editor-label">

<%= Html.LabelFor(m => m.UserName) %>

</div>

<div class="editor-field">

<%= Html.TextBoxFor(m => m.UserName)%>

<%= Html.ValidationMessageFor(m => m.UserName)%>

<label id="UserNameTip"></label>

</div>

<div class="editor-label">

<%= Html.LabelFor(m => m.Password) %>

</div>

<div class="editor-field">

<%= Html.PasswordFor(m => m.Password) %>

<%= Html.ValidationMessageFor(m => m.Password) %>

</div>

<p>

<input type="submit" value="登录" />

</p>

</fieldset>

</div>

<% } %>

2.代码添加好后，在对应的Action中用[ValidateAntiForgeryToken]进行标识即可；

[HttpPost][ValidateAntiForgeryToken]public ActionResult Login(Usr usr){if (ModelState.IsValid){var model = DB.Context.Single(p => p.SystemUser == true && p.UserName == usr.UserName && p.Password == usr.Password);if (model != null){authenticate.Login(usr.UserName, usr.Role);return RedirectToAction("UserList", "Admin");}else{ModelState.AddModelError("", "提供的用户名或密码不正确。");}}return View(usr);}