FormsAuthentication.Encrypt(FormsAuthenticationTicket) Método
Definição
Importante
Algumas informações se referem a produtos de pré-lançamento que podem ser substancialmente modificados antes do lançamento. A Microsoft não oferece garantias, expressas ou implícitas, das informações aqui fornecidas.
Cria uma cadeia de caracteres que contém um tíquete de autenticação de formulários criptografado adequado para uso em um cookie HTTP.
public:
static System::String ^ Encrypt(System::Web::Security::FormsAuthenticationTicket ^ ticket);
public static string Encrypt (System.Web.Security.FormsAuthenticationTicket ticket);
static member Encrypt : System.Web.Security.FormsAuthenticationTicket -> string
Public Shared Function Encrypt (ticket As FormsAuthenticationTicket) As String
Parâmetros
- ticket
- FormsAuthenticationTicket
O objeto FormsAuthenticationTicket com o qual criar o tíquete de autenticação de formulários criptografado.
Retornos
Uma cadeia de caracteres que contém um tíquete de autenticação de formulários criptografado.
Exceções
ticket
é null
.
Exemplos
O exemplo de código a seguir armazena o resultado do Encrypt método em um cookie usando a FormsCookieName propriedade e redireciona o usuário para a URL retornada do GetRedirectUrl método .
Importante
Este exemplo contém uma caixa de texto que aceita a entrada do usuário, que é uma possível ameaça à segurança. Por padrão, ASP.NET páginas da Web validam que a entrada do usuário não inclui elementos html ou script. Para obter mais informações, consulte Visão geral de explorações de script.
<%@ Page Language="C#" %>
<%@ Import Namespace="System.Web.Security" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
private void Login_Click(Object sender, EventArgs e)
{
// Create a custom FormsAuthenticationTicket containing
// application specific data for the user.
string username = UserNameTextBox.Text;
string password = UserPassTextBox.Text;
bool isPersistent = false;
if (Membership.ValidateUser(username, password))
{
string userData = "ApplicationSpecific data for this user.";
FormsAuthenticationTicket ticket = new FormsAuthenticationTicket(1,
username,
DateTime.Now,
DateTime.Now.AddMinutes(30),
isPersistent,
userData,
FormsAuthentication.FormsCookiePath);
// Encrypt the ticket.
string encTicket = FormsAuthentication.Encrypt(ticket);
// Create the cookie.
Response.Cookies.Add(new HttpCookie(FormsAuthentication.FormsCookieName, encTicket));
// Redirect back to original URL.
Response.Redirect(FormsAuthentication.GetRedirectUrl(username, isPersistent));
}
else
{
Msg.Text = "Login failed. Please check your user name and password and try again.";
}
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
<title>Forms Authentication Login</title>
</head>
<body>
<form id="form1" runat="server">
<span style="BACKGROUND: #80ff80; font-weight:bold">
Login Page
</span>
<asp:Label id="Msg" ForeColor="maroon" runat="server" /><br />
<table border="0">
<tbody>
<tr>
<td>Username:</td>
<td><asp:TextBox id="UserNameTextBox" runat="server" /></td>
<td>
<asp:RequiredFieldValidator id="RequiredFieldValidator1"
runat="server" ErrorMessage="*"
Display="Static"
ControlToValidate="UserNameTextBox" />
</td>
</tr>
<tr>
<td>Password:</td>
<td><asp:TextBox id="UserPassTextBox" TextMode="Password" runat="server" /></td>
<td>
<asp:RequiredFieldValidator id="RequiredFieldValidator2"
runat="server" ErrorMessage="*"
Display="Static"
ControlToValidate="UserPassTextBox" />
</td>
</tr>
</tbody>
</table>
<input type="submit" value="Login" runat="server" onserverclick="Login_Click" />
</form>
</body>
</html>
<%@ Page Language="VB" %>
<%@ Import Namespace="System.Web.Security" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
Private Sub Login_Click(sender As Object, e As EventArgs)
' Create a custom FormsAuthenticationTicket containing
' application specific data for the user.
Dim username As String = UserNameTextBox.Text
Dim password As String = UserPassTextBox.Text
Dim isPersistent As Boolean = False
If Membership.ValidateUser(username, password) Then
Dim userData As String = "ApplicationSpecific data for this user."
Dim ticket As FormsAuthenticationTicket = New FormsAuthenticationTicket(1, _
username, _
DateTime.Now, _
DateTime.Now.AddMinutes(30), _
isPersistent, _
userData, _
FormsAuthentication.FormsCookiePath)
' Encrypt the ticket.
Dim encTicket As String = FormsAuthentication.Encrypt(ticket)
' Create the cookie.
Response.Cookies.Add(New HttpCookie(FormsAuthentication.FormsCookieName, encTicket))
' Redirect back to original URL.
Response.Redirect(FormsAuthentication.GetRedirectUrl(username, isPersistent))
Else
Msg.Text = "Login failed. Please check your user name and password and try again."
End If
End Sub
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
<title>Forms Authentication Login</title>
</head>
<body>
<form id="form1" runat="server">
<span style="BACKGROUND:#80ff80; font-weight:bold">
Login Page
</span>
<asp:Label id="Msg" ForeColor="maroon" runat="server" /><br />
<table border="0">
<tbody>
<tr>
<td>Username:</td>
<td><asp:TextBox id="UserNameTextBox" runat="server" /></td>
<td>
<asp:RequiredFieldValidator id="RequiredFieldValidator1"
runat="server" ErrorMessage="*"
Display="Static"
ControlToValidate="UserNameTextBox" />
</td>
</tr>
<tr>
<td>Password:</td>
<td><asp:TextBox id="UserPassTextBox" TextMode="Password" runat="server" /></td>
<td>
<asp:RequiredFieldValidator id="RequiredFieldValidator2"
runat="server" ErrorMessage="*"
Display="Static"
ControlToValidate="UserPassTextBox" />
</td>
</tr>
</tbody>
</table>
<input type="submit" value="Login" runat="server" onserverclick="Login_Click" />
</form>
</body>
</html>