Intranet - AD

I developed an Intranet site for my company for a year now. I have a login page which users credential store in SQL. Now I want to switch it to AD. I am using .net 3.5 and aspx. How should I go about doing something like this? I use session on username. How would this work when I use AD to authentication?
VBdotnet2005Asked:
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piattndCommented:
This link describes the process of authenticating via LDAP using asp.
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Ricardo MartínezInformation SecurityCommented:
You need to change the authentication on the login page to check the credentials on the AD. Check this:

http://msdn.microsoft.com/en-us/library/ms180890(v=vs.80).aspx
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VBdotnet2005Author Commented:
I don't understand what _path is?

public LdapAuthentication(string path)
    {
      _path = path;
    }
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VBdotnet2005Author Commented:
guru_sami,

I got the link to work.

 
I can get username below. I can type it in a login page, and it works perfectly. What if I don't want to type password ? Can I use Windowsidentiy to pass it in too?


dim id as windowsidentity = windowsidentity.getcurrent
dim username as string = id.name    <<< username



Public Function AuthenticateUser(ByVal username As String, ByVal password As String) As Boolean
        Dim root As New DirectoryEntry("LDAP://RootDSE")
        Using root
            Dim dnc As String = root.Properties("defaultNamingContext")(0).ToString()
            Dim server As String = root.Properties("dnsHostName")(0).ToString()

            Dim adsPath As String = [String].Format("LDAP://{0}/{1}", server, dnc)
            Dim authentic As Boolean = False
            Dim entry As New DirectoryEntry(adsPath, username, password)
            Try
                Dim nativeObject As Object = entry.NativeObject
           
                authentic = True
            Catch dsce As DirectoryServicesCOMException
                Return False
            End Try
        End Using
        Return True
    End Function
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guru_samiCommented:
WindowsIdentity.GetCurrentUser will give you the account under which asp.net is running.

So if you are not using WindowsAuthenticaiton+Impersonation, it is not going to return the actual user most likely NT Authority\Network Service. And if you have Windows Authentication On then I don't see a use of doing LDAP authentication.

Check this for more info: http://www.bluevisionsoftware.com/WebSite/TipsAndTricksDetails.aspx?Name=AspNetAccount

Not sure if you are looking for something like this: http://msdn.microsoft.com/en-us/library/ms972958.aspx
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