Question

i have a project where i need to use the active directory for login to a website made in asp.net, i follow this tutorial….

Active Directory Authentication from ASP .NET

now i want to get the groups of the user, i tried the next code in the default.aspx.vb page but doesn’t work..

Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
    Response.Write("Hello, " + Server.HtmlEncode(User.Identity.Name))

    Dim id As FormsIdentity = CType(User.Identity, FormsIdentity)

    If id IsNot Nothing Then

        Dim ticket As FormsAuthenticationTicket = id.Ticket
        Response.Write("<p/>TicketName: " + ticket.Name)
        Response.Write("<br/>Cookie Path: " + ticket.CookiePath)
        Response.Write("<br/>Ticket Expiration: " + ticket.Expiration.ToString())
        Response.Write("<br/>Expired: " + ticket.Expired.ToString())
        Response.Write("<br/>Persistent: " + ticket.IsPersistent.ToString())
        Response.Write("<br/>IssueDate: " + ticket.IssueDate.ToString())
        Response.Write("<br/>UserData: " + ticket.UserData)
        Response.Write("<br/>Version: " + ticket.Version.ToString())
    End If
End Sub

Answer 1

I find a better solution, is more easy than any answer that i find on the internet.

First i create a class to validate if an user is in a group in the active directory:

Imports System.Security.Principal   

Public Class AutorizationFun
    Dim access As Boolean = False
    Dim id As WindowsIdentity = WindowsIdentity.GetCurrent()
    Public User As WindowsPrincipal = New WindowsPrincipal(id)

Region “Groups Verification”

'Belongs to sample group
Private Function inSampleGroup() As Boolean
    Return User.IsInRole("bth0\GG BTUC-SAMPLEGROUP")
End Function
Private Function inSampleGroup2() As Boolean
    Return User.IsInRole("bth0\GG BTUC-SAMPLEGROUP2")
End Function

End Region

Public Function ProgramsAccsess(ByVal vPage As String) As Boolean
    access = False

    Select Case vPage
        Case "~/Sample.aspx"
            If inSampleGroup() Then
                access = True
            End If
        '---------------------------------------------------------------------
    End Select
    '*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
    'access = True
    '*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
    Return access
End Function   

End Class

Then you have to create a function in the code behind of all pages:

'create var
    Dim ValidateUser As New AutorizationFun

    Protected Sub VerifyAccessPage()
        If ValidateUser.ProgramsAccsess(Request.AppRelativeCurrentExecutionFilePath) = False Then
            Response.Redirect("~/DeniedAccess.aspx")
        End If
    End Sub

And to finish to have to use the function in the Page_load event:

Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
        'check whether page is postback or not            
        If Not Page.IsPostBack Then
            VerifyAccessPage()
        End If
    End Sub