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ÊÃéÒ§á;ÅÔपѹàÇçº ASP.NET ·Õèã¹ Visual Basic .NET

1. àÃÔèÁ Microsoft Visual Studio .NET
2. 㹡ÒÃá¿éÁ:àÁ¹Ù ãËéªÕéä»·ÕèãËÁèáÅéÇ ¤ÅÔ¡Project.
3. ¤ÅÔ¡â¤Ã§¡Òà visual BasicÀÒÂãµéª¹Ô´â¤Ã§¡ÒÃáÅéÇ ¤ÅÔ¡á;ÅÔपѹàÇçº asp.netÀÒÂãµéáÁèẺ.
4. 㹡ÒõÓá˹è§:¡Åèͧ ª¹Ô´http:// <servername> / FormsAuthAd </servername>(á·¹·Õèhttp://localhost¶éҤس¡ÓÅѧãªéà«ÔÃì¿àÇÍÃìÀÒÂã¹à¤Ã×èͧ (so à»ç¹ä»ä´éhttp://localhost/FormsAuthAdáÅéÇ ¤ÅÔ¡µ¡Å§.
5. ¤ÅÔ¡¢ÇÒÍéÒ§ÍÔ§:â˹´ã¹ Explorer â«Å٪ѹ áÅéǤÅÔ¡à¾ÔèÁ¡ÒÃÍéÒ§ÍÔ§.
6. 㹡ÒÃ.NETá·çºã¹¹Ñé¹à¾ÔèÁ¡ÒÃÍéÒ§ÍÔ§¡ÅèͧâµéµÍº ¤ÅÔ¡System.DirectoryServices.dll¤ÅÔ¡àÅ×Í¡áÅéÇ ¤ÅÔ¡µ¡Å§.

à¢Õ¹ÃËÑÊ¡ÒÃÃѺÃͧ¤ÇÒÁ¶Ù¡µéͧ

1. â«Å٪ѹ Explorer ¤ÅÔ¡¢ÇÒ·Õèâ˹â¤Ã§¡Òà ªÕéä»·ÕèaddáÅéÇ ¤ÅÔ¡à¾ÔèÁÃÒ¡ÒÃãËÁè.
2. ¤ÅÔ¡¤ÅÒÊÀÒÂãµéáÁèẺ.
3. »ÃÐàÀ·:LdapAuthentication.vb㹡Òê×èÍ:¡Åèͧ áÅéǤÅÔ¡OPEN.
4. á·¹â¤é´·ÕèÁÕÍÂÙèã¹á¿éÁ LdapAuthentication.vb ´éÇÂÃËÑʵèÍ仹Õé:

   Imports System
   Imports System.Text
   Imports System.Collections
   Imports System.DirectoryServices
   
   Namespace FormsAuth
       Public Class LdapAuthentication
   
           Dim _path As String
           Dim _filterAttribute As String
   
           Public Sub New(ByVal path As String)
               _path = path
           End Sub
   
           Public Function IsAuthenticated(ByVal domain As String, ByVal username As String, ByVal pwd As String) As Boolean
   
               Dim domainAndUsername As String = domain & "\" & username
               Dim entry As DirectoryEntry = New DirectoryEntry(_path, domainAndUsername, pwd)
   
               Try
                   'Bind to the native AdsObject to force authentication.			
                   Dim obj As Object = entry.NativeObject
                   Dim search As DirectorySearcher = New DirectorySearcher(entry)
   
                   search.Filter = "(SAMAccountName=" & username & ")"
                   search.PropertiesToLoad.Add("cn")
                   Dim result As SearchResult = search.FindOne()
   
                   If (result Is Nothing) Then
                       Return False
                   End If
   
                   'Update the new path to the user in the directory.
                   _path = result.Path
                   _filterAttribute = CType(result.Properties("cn")(0), String)
   
               Catch ex As Exception
                   Throw New Exception("Error authenticating user. " & ex.Message)
               End Try
   
               Return True
           End Function
   
           Public Function GetGroups() As String
               Dim search As DirectorySearcher = New DirectorySearcher(_path)
               search.Filter = "(cn=" & _filterAttribute & ")"
               search.PropertiesToLoad.Add("memberOf")
               Dim groupNames As StringBuilder = New StringBuilder()
   
               Try
                   Dim result As SearchResult = search.FindOne()
                   Dim propertyCount As Integer = result.Properties("memberOf").Count
   
                   Dim dn As String
                   Dim equalsIndex, commaIndex
   
                   Dim propertyCounter As Integer
   
                   For propertyCounter = 0 To propertyCount - 1
                       dn = CType(result.Properties("memberOf")(propertyCounter), String)
   
                       equalsIndex = dn.IndexOf("=", 1)
                       commaIndex = dn.IndexOf(",", 1)
                       If (equalsIndex = -1) Then
                           Return Nothing
                       End If
   
                       groupNames.Append(dn.Substring((equalsIndex + 1), (commaIndex - equalsIndex) - 1))
                       groupNames.Append("|")
                   Next
   
               Catch ex As Exception
                   Throw New Exception("Error obtaining group names. " & ex.Message)
               End Try
   
               Return groupNames.ToString()
           End Function
       End Class
   End Namespace
   
   
   					

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CN=...,...,DC=domain,DC=com
				

à¢Õ¹ÃËÑÊ Global.asax

1. ¤ÅÔ¡¢ÇÒã¹ Explorer â«Å٪ѹGlobal.asaxáÅéÇ ¤ÅÔ¡ÃËÑʢͧÁØÁÁͧ.
2. à¾ÔèÁÃËÑʵèÍ仹Õé·Õè´éÒ¹º¹¢Í§ÃËÑÊ ËÅѧá¿éÁ Global.asax.vb:

   Imports System.Web.Security
   Imports System.Security.Principal
   					

3. µÑǨѴ¡ÒÃà˵ءÒóì·ÕèÇèÒ§·ÕèÁÕÍÂÙèÊÓËÃѺ᷹Application_AuthenticateRequestÁÕÃËÑʵèÍ仹Õé:

   Sub Application_AuthenticateRequest(ByVal sender As Object, ByVal e As EventArgs)
           ' Fires upon attempting to authenticate the use
           Dim cookieName As String = FormsAuthentication.FormsCookieName
           Dim authCookie As HttpCookie = Context.Request.Cookies(cookieName)
   
           If (authCookie Is Nothing) Then
               'There is no authentication cookie.
               Return
           End If
   
           Dim authTicket As FormsAuthenticationTicket = Nothing
   
           Try
               authTicket = FormsAuthentication.Decrypt(authCookie.Value)
           Catch ex As Exception
               'Write the exception to the Event Log.
               Return
           End Try
   
           If (authTicket Is Nothing) Then
               'Cookie failed to decrypt.
               Return
           End If
   
           'When the ticket was created, the UserData property was assigned a
           'pipe-delimited string of group names.
           Dim groups As String() = authTicket.UserData.Split(New Char() {"|"})
   
           'Create an Identity.
           Dim id As GenericIdentity = New GenericIdentity(authTicket.Name, "LdapAuthentication")
   
           'This principal flows throughout the request.
           Dim principal As GenericPrincipal = New GenericPrincipal(id, groups)
   
           Context.User = principal
   
       End Sub
   					

»ÃѺà»ÅÕè¹á¿éÁ Web.config

<?xml version="1.0" encoding="utf-8" ?>
<configuration>    
  <system.web>
    <authentication mode="Forms">
      <forms loginUrl="logon.aspx" name="adAuthCookie" timeout="60" path="/" >
      </forms>
    </authentication>	
    <authorization>	
      <deny users="?" />
      <allow users="*" />
    </authorization>	
    <identity impersonate="true" />
  </system.web>
</configuration>
				

¡ÒõÑ駤èҤ͹¿Ô¡ IIS ÊÓËÃѺ¡ÒÃÃѺÃͧ¤ÇÒÁ¶Ù¡µéͧẺäÁèÃкت×èÍ

1. 㹤͹â«Å¡ÒèѴ¡ÒúÃÔ¡ÒâéÍÁÙÅ·Ò§ÍÔ¹à·ÍÃìà¹çµ (IIS) ¤ÅÔ¡¢ÇÒ·Õèâ˹ä´àá·ÍÃÕàÊÁ×͹ÊÓËÃѺ"FormsAuthAd".
2. ¤ÅÔ¡¡ÒäسÊÁºÑµÔáÅéÇ ¤ÅÔ¡¡ÒäÇÒÁ»ÅÍ´ÀÑ¢ͧä´àá·ÍÃÕá·çº
3. ¤ÅÔ¡á¡éä¢ÀÒÂãµé¤Çº¤ØÁ¡ÒÃà¢éÒ¶Ö§áÅСÒÃÃѺÃͧ¤ÇÒÁ¶Ù¡µéͧẺäÁèÃкت×èÍ.
4. àÅ×Í¡¡ÒáÒÃà¢éҶ֧ẺäÁèÃкت×èÍ¡Åèͧ¡Òà¤Ã×èͧËÁÒÂ
5. ·ÓãËéºÑ­ªÕ·ÕèäÁèÃкت×èÍÊÓËÃѺâ»Ãá¡ÃÁ»ÃÐÂØ¡µì·ÕèãªéºÑ­ªÕ·ÕèÁÕÊÔ·¸Ôì㹡Òà Active Directory
6. ¤ÅÔ¡à¾×èÍ¡àÅÔ¡àÅ×Í¡¹Ñé¹Í¹Ø­ÒµãËé IIS ä»ÂѧµÑǤǺ¤ØÁÃËÑʼèÒ¹¡Åèͧ¡Òà¤Ã×èͧËÁÒÂ

ÊÃéҧྠLogon.aspx

1. â«Å٪ѹ Explorer ¤ÅÔ¡¢ÇÒ·Õèâ˹â¤Ã§¡Òà ªÕéä»·ÕèaddáÅéÇ ¤ÅÔ¡à¾ÔèÁ¿ÍÃìÁàÇçº.
2. »ÃÐàÀ·:Logon.aspx㹡Òê×èÍ:¡Åèͧ áÅéǤÅÔ¡OPEN.
3. ¤ÅÔ¡¢ÇÒã¹ Explorer â«Å٪ѹLogon.aspxáÅéÇ ¤ÅÔ¡µÑÇÍ͡ẺÁØÁÁͧ.
4. ¤ÅÔ¡¡ÒÃhtmlá·çºã¹ Designer
5. á·¹ÃËÑÊ·ÕèÁÕÍÂÙè ´éÇÂÃËÑʵèÍ仹Õé:

   <%@ Page language="vb" AutoEventWireup="true" %>
   <%@ Import Namespace="FormsAuthAd.FormsAuth" %>
   <html>
   	<body>
   		<form id="Login" method="post" runat="server">
   			<asp:Label ID="Label1" Runat="server">Domain:</asp:Label>
   			<asp:TextBox ID="txtDomain" Runat="server"></asp:TextBox><br>
   			<asp:Label ID="Label2" Runat="server">Username:</asp:Label>
   			<asp:TextBox ID="txtUsername" Runat="server"></asp:TextBox><br>
   			<asp:Label ID="Label3" Runat="server">Password:</asp:Label>
   			<asp:TextBox ID="txtPassword" Runat="server" TextMode="Password"></asp:TextBox><br>
   			<asp:Button ID="btnLogin" Runat="server" Text="Login" OnClick="Login_Click"></asp:Button><br>
   			<asp:Label ID="errorLabel" Runat="server" ForeColor="#ff3300"></asp:Label><br>
   			<asp:CheckBox ID="chkPersist" Runat="server" Text="Persist Cookie" />
   		</form>
   	</body>
   </html>
   <script runat="server">
   sub Login_Click(sender as object,e as EventArgs)
     Dim adPath as String = "LDAP://DC=..,DC=.." 'Path to your LDAP directory server
     Dim adAuth as LdapAuthentication = new LdapAuthentication(adPath)
     try
       if(true = adAuth.IsAuthenticated(txtDomain.Text, txtUsername.Text, txtPassword.Text)) then
         Dim groups as string = adAuth.GetGroups()
   
         'Create the ticket, and add the groups.
         Dim isCookiePersistent as boolean = chkPersist.Checked
         Dim authTicket as FormsAuthenticationTicket = new FormsAuthenticationTicket(1, _
              txtUsername.Text,DateTime.Now, DateTime.Now.AddMinutes(60), isCookiePersistent, groups)
   	
         'Encrypt the ticket.
         Dim encryptedTicket as String = FormsAuthentication.Encrypt(authTicket)
   		
         'Create a cookie, and then add the encrypted ticket to the cookie as data.
         Dim authCookie as HttpCookie = new HttpCookie(FormsAuthentication.FormsCookieName, encryptedTicket)
   
         if(isCookiePersistent = true) then
   		authCookie.Expires = authTicket.Expiration
         end if				
         'Add the cookie to the outgoing cookies collection.
         Response.Cookies.Add(authCookie)	
   
         'You can redirect now.
         Response.Redirect(FormsAuthentication.GetRedirectUrl(txtUsername.Text, false))
       
       else
         errorLabel.Text = "Authentication did not succeed. Check user name and password."
       end if
    
     catch ex as Exception
       errorLabel.Text = "Error authenticating. " & ex.Message
     end try
   end sub
   </script>
   					

6. »ÃѺà»ÅÕè¹àÊé¹·Ò§ã¹Ë¹éÒ Logon.aspx ãËéªÕéä»Âѧà«ÔÃì¿àÇÍÃì LDAP ä´àá·ÍÃբͧ¤Ø³

• ÊÃéÒ§¤ÓFormsAuthenticationTicketÇѵ¶Ø
• ºÑµÃ ¡ÒÃà¢éÒÃËÑÊ
• à¾ÔèÁºÑµÃ·Õèà¢éÒÃËÑÊÅѺ¤Ø¡¡Õé
• à¾ÔèÁ¤Ø¡¡Õéä»ÂѧHttpResponse.Cookies¤ÍÅàÅ¡ªÑ¹
• ¡ÒÃà»ÅÕè¹àÊé¹·Ò§¡ÒÃÃéͧ¢Íä»Âѧ URL ·Õè¶Ù¡Ãéͧ¢ÍµÑé§áµèáá

»ÃѺà»ÅÕè¹ྠWebForm1.aspx

1. ¤ÅÔ¡¢ÇÒã¹ Explorer â«Å٪ѹWebForm1.aspxáÅéÇ ¤ÅÔ¡µÑÇÍ͡ẺÁØÁÁͧ.
2. ¤ÅÔ¡¡ÒÃhtmlá·çºã¹ Designer
3. á·¹ÃËÑÊ·ÕèÁÕÍÂÙè ´éÇÂÃËÑʵèÍ仹Õé:

   <%@ Page language="vb" AutoEventWireup="true" %>
   <%@ Import Namespace="System.Security.Principal" %>
   <html>
   	<body>
   		<form id="Form1" method="post" runat="server">
   			<asp:Label ID="lblName" Runat="server" /><br>
   			<asp:Label ID="lblAuthType" Runat="server" />
   		</form>
   	</body>
   </html>
   <script runat="server">
   sub Page_Load(sender as object, e as EventArgs)
     lblName.Text = "Hello " + Context.User.Identity.Name & "."
     lblAuthType.Text = "You were authenticated using " &   Context.User.Identity.AuthenticationType & "."
   end sub
   </script>
   					

4. ºÑ¹·Ö¡á¿éÁ·Ñé§ËÁ´ áÅСÒäÍÁä¾Åìâ¤Ã§¡ÒÃáÅéÇ
5. ¡ÒÃÃéͧ¢ÍྠWebForm1.aspx ¢ÍãËéÊѧࡵÇèÒ ¤Ø³¨Ðà»ÅÕè¹àÊé¹à¾×èÍ Logon.aspx
6. ¾ÔÁ¾ì¢éÍÁÙÅ»ÃШӵÑÇ¡ÒÃà¢éÒÊÙèÃкº áÅШҡ¹Ñé¹ ¤ÅÔ¡Êè§. àÁ×èͤسà»ÅÕè¹àÊé¹·Ò§ä»Âѧ WebForm1.aspx ¢ÍãËéÊѧࡵÇèÒ ª×èͼÙéãªé»ÃÒ¡¯¢Öé¹ áÅзÕèLdapAuthenticationÁÕª¹Ô´¢Í§¡ÒÃÃѺÃͧ¤ÇÒÁ¶Ù¡µéͧÊÓËÃѺ¡ÒÃContext.User.Identity.AuthenticationType¤Ø³ÊÁºÑµÔ

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