LDAP Authentication Problem

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LDAP Authentication Problem

Last post 06-03-2009 10:24 AM by jeff@zina.com. 2 replies.

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LDAP Authentication Problem

06-02-2009, 4:56 AM

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1 point Member
rpc24
Member since 01-02-2009, 12:06 PM
Posts 9

I developed an application in sharepoint and configured it with LDAP. But i am unable to login tot he site using AD credentials.

and then added above tags in web.config file of both sites(actual site and extended one) and also in Central admin's web.config file. Then in Authentication Provider (Central Adminstration-->Application Management ) changed the authentication type to form and added the provider as well as Role name. But still i'm unable to login using the proper credentials.

Can anyone please tell me, where i am going wrong or i'm missing any step.

Thanks in advance

Reshma

Filed under: SharePoint 2007

Re: LDAP Authentication Problem

06-02-2009, 10:35 AM

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856 point Participant
jacobodolil
Member since 03-19-2009, 3:23 PM
Cochin
Posts 225

The C# LDAP Class uses the System.DirectoryServices namespace to perform Active Directory search. See the code below:

public bool IsAuthenticated(String domain, String username, String pwd)
{
//Create the directory entry
String domainAndUsername = domain + @"\" + username;
DirectoryEntry entry = new DirectoryEntry(_path, domainAndUsername, pwd);
bool returnval = true;
ErrDesc = "";

try
{
//Bind to the native AdsObject to force authentication.
Object obj = entry.NativeObject;

//Search the user on the Active Directory
DirectorySearcher search = new DirectorySearcher(entry);

search.Filter = "(SAMAccountName=" + username + ")";
search.PropertiesToLoad.Add("cn");
SearchResult result = search.FindOne();

if (null == result)
{
returnval = false;
}

//Update the new path to the user in the directory.
_path = result.Path;
_filterAttribute = (String)result.Properties["cn"][0];
}
catch (Exception ex)
{
returnval = false;
ErrDesc = "Error authenticating user. " + ex.Message;
}

return returnval;
}

IsAuthenticated function searches for a domain user inside a specific Domain. You just have to compile this class to build the DLL and call it from VB.NET or ASP.NET as shown below:

Imports SingleSignOnExt 'Import SingleSignOnExt.dll

Public Class Form1

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click

Dim son As New SingleSignOn()

son.LDAP_Path = "LDAP://yourdomain"

If son.IsAuthenticated("yourdomain", TextBox1.Text, TextBox2.Text) Then 'Parameters: Domain, Username, Password
Label1.Text = "User is authenticated!"
Else
Label1.Text = "User is invalid! -- " & son.ErrDesc
End If

End Sub

End Class