Forms Authentication Ticket In Asp.Net 2.0 3.5

In this article i am explaining how to implement FormsAuthenticationTicket And Managing UserData Roles In Asp.Net 2.0,3.5,4.0 using C# And VB.NET



For implementing forms authentication without using formsauthentication ticket, read my previous article - Forms Authentication with C# and managing folder lavel access with multiple web.config files

Configuring web.config file in application root

<authentication mode="Forms">
<forms defaultUrl="Default.aspx" loginUrl="~/Login.aspx"
slidingExpiration="true" timeout="20"></forms>
</authentication>

Defining roles and accessibility in root web.config

<location path="Admin">
<system.web>
<authorization>
<allow roles="admin"/>
<deny users="*"/>
</authorization>

</system.web>

</location>

Defining roles settings for folders and aspx within those folders in web.config file in those folders

<system.web>
<authorization>
<allow roles="user"/>
<deny users="*"/>
</authorization>
</system.web>

settings for any logged in member

<system.web>
<authorization>
<deny users="?"/>
</authorization>

Now after creating Login page we need to authenticate user

protected void Login1_Authenticate(object sender, AuthenticateEventArgs e)
{
string userName = Login1.UserName;
string password = Login1.Password;
bool rememberUserName = Login1.RememberMeSet;

//Fetch User login information fromthe xml file into Dataset

string xmlFilePath = Server.MapPath("~/App_Data/LoginInfo.xml");
DataSet objDs = new DataSet();
objDs.ReadXml(xmlFilePath);
DataRow[] dRow = objDs.Tables[0].Select("UserName = '" + userName + "' and Password = '" + password + "'");
if (dRow.Length > 0)
{
//Fetch the role
string roles = dRow[0]["Roles"].ToString();

//Create Form Authentication ticket
FormsAuthenticationTicket ticket = new FormsAuthenticationTicket(1, userName, DateTime.Now, DateTime.Now.AddMinutes(20), rememberUserName, roles, FormsAuthentication.FormsCookiePath);

// In the above parameters 1 is ticket version, username is the username associated with this ticket
//time when ticket was issued , time when ticket will expire, remember username is user has chekced it
//roles associted with the user, and path of cookie if any

//For security reasons we may hash the cookies
string hashCookies = FormsAuthentication.Encrypt(ticket);
HttpCookie cookie = new HttpCookie(FormsAuthentication.FormsCookieName, hashCookies);

// add the cookie to user browser

Response.Cookies.Add(cookie);

// get the requested page

string returnUrl = Request.QueryString["ReturnUrl"];
if (returnUrl == null)
returnUrl = "~/Default.aspx";
Response.Redirect(returnUrl);
}

Now to retrieve the authentication and roles information on every request we need to write this code in Global.asax file

protected void Application_AuthenticateRequest(object sender, EventArgs e)
{
// look if any security information exists for this request

if (HttpContext.Current.User != null)
{

// see if this user is authenticated, any authenticated cookie (ticket) exists for this user

if (HttpContext.Current.User.Identity.IsAuthenticated)
{

// see if the authentication is done using FormsAuthentication

if (HttpContext.Current.User.Identity is FormsIdentity)
{

// Get the roles stored for this request from the ticket

// get the identity of the user

FormsIdentity identity = (FormsIdentity)HttpContext.Current.User.Identity;

//Get the form authentication ticket of the user

FormsAuthenticationTicket ticket = identity.Ticket;

//Get the roles stored as UserData into ticket

string[] roles = ticket.UserData.Split(',');

//Create general prrincipal and assign it to current request

HttpContext.Current.User = new System.Security.Principal.GenericPrincipal(identity, roles);
}
}
}
}

To check whether user in in the role or not we need to write this code in every page which provide access on role basis

protected void Page_Load(object sender, EventArgs e)
{
if (HttpContext.Current.User.IsInRole("admin"))
{
lblMessage.Text = "Welcome Administrator";
}
}

Download sample code


Related Articles :

1. Forms Authentication with C# and managing
folder lavel access with multiple web.config files

2. User validation across pages using session
after login in ASP.NET using C sharp

3. Detecting Session Timeout
and Redirect to Login Page in ASP.NET

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