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// This code is derived from jcifs smb client library <jcifs at samba dot org>
// Ported by J. Arturo <webmaster at komodosoft dot net>
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
namespace SharpCifs.Smb
{
/// <summary>
/// This class can be extended by applications that wish to trap authentication related exceptions and automatically retry the exceptional operation with different credentials.
/// </summary>
/// <remarks>
/// This class can be extended by applications that wish to trap authentication related exceptions and automatically retry the exceptional operation with different credentials. Read <a href="../../../authhandler.html">jCIFS Exceptions and NtlmAuthenticator</a> for complete details.
/// </remarks>
public abstract class NtlmAuthenticator
{
private static NtlmAuthenticator _auth;
private string _url;
private SmbAuthException _sae;
private void Reset()
{
_url = null;
_sae = null;
}
/// <summary>Set the default <tt>NtlmAuthenticator</tt>.</summary>
/// <remarks>
/// Set the default <tt>NtlmAuthenticator</tt>. Once the default authenticator is set it cannot be changed. Calling this metho again will have no effect.
/// </remarks>
public static void SetDefault(NtlmAuthenticator a)
{
lock (typeof(NtlmAuthenticator))
{
if (_auth != null)
{
return;
}
_auth = a;
}
}
protected internal string GetRequestingUrl()
{
return _url;
}
protected internal SmbAuthException GetRequestingException()
{
return _sae;
}
/// <summary>
/// Used internally by jCIFS when an <tt>SmbAuthException</tt> is trapped to retrieve new user credentials.
/// </summary>
/// <remarks>
/// Used internally by jCIFS when an <tt>SmbAuthException</tt> is trapped to retrieve new user credentials.
/// </remarks>
public static NtlmPasswordAuthentication RequestNtlmPasswordAuthentication(string url,
SmbAuthException sae)
{
if (_auth == null)
{
return null;
}
lock (_auth)
{
_auth._url = url;
_auth._sae = sae;
return _auth.GetNtlmPasswordAuthentication();
}
}
/// <summary>An application extending this class must provide an implementation for this method that returns new user credentials try try when accessing SMB resources described by the <tt>getRequestingURL</tt> and <tt>getRequestingException</tt> methods.
/// </summary>
/// <remarks>
/// An application extending this class must provide an implementation for this method that returns new user credentials try try when accessing SMB resources described by the <tt>getRequestingURL</tt> and <tt>getRequestingException</tt> methods.
/// If this method returns <tt>null</tt> the <tt>SmbAuthException</tt> that triggered the authenticator check will simply be rethrown. The default implementation returns <tt>null</tt>.
/// </remarks>
protected internal virtual NtlmPasswordAuthentication GetNtlmPasswordAuthentication()
{
return null;
}
}
}
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