Active Directory Authentication in IIS 6
- From: "P Webster" <NOSPAM_REMpdwebster4@xxxxxxxxxxxxx>
- Date: Thu, 23 Mar 2006 17:07:26 -0700
We recently moved a web site that validated user credentials in Active
Directory from IIS 5.1 to IIS 6, and the validation code no longer works.
The web.config file is set to Windows authentication because all we do is
verify the user on the login form so we can redirect them to the appropriate
page based on their group.
The code to authenticate is:
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 &
"<BR>" & ex.StackTrace.ToString)
End Try
Return True
End Function
In IIS 6, we have tried all possible combinations of directory security.
When we first moved the site to IIS 6, an error was generated by the above
code stating the parameter was incorrect, so we tried adding
AuthenticationTypes.None and AuthenticationTypes.Anonymous as the final
parameter for DirectoryEntry(... The result was a message returned as
"unknown user name or bad password. The user name and password entered were
correct, so I don't understand why that error was generated.
Any ideas would be greatly appreciated.
Paul
.
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