/* jcifs smb client library in Java
* Copyright (C) 2002 "Michael B. Allen" <jcifs at samba dot org>
* "Eric Glass" <jcifs at samba dot org>
* "Jason Pugsley" <jcifs at samba dot org>
* "skeetz" <jcifs at samba dot org>
*
* 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
*/
package com.knowgate.jcifs.http;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.knowgate.jcifs.smb.NtlmPasswordAuthentication;
import com.knowgate.misc.Base64Decoder;
import com.knowgate.misc.Base64Encoder;
import com.knowgate.jcifs.ntlmssp.NtlmFlags;
import com.knowgate.jcifs.ntlmssp.Type1Message;
import com.knowgate.jcifs.ntlmssp.Type2Message;
import com.knowgate.jcifs.ntlmssp.Type3Message;
/**
* This class is used internally by <tt>NtlmHttpFilter</tt>,
* <tt>NtlmServlet</tt>, and <tt>NetworkExplorer</tt> to negiotiate password
* hashes via NTLM SSP with MSIE. It might also be used directly by servlet
* containers to incorporate similar functionality.
* <p>
* How NTLMSSP is used in conjunction with HTTP and MSIE clients is
* described in an <A HREF="http://www.innovation.ch/java/ntlm.html">NTLM
* Authentication Scheme for HTTP</A>. <p> Also, read <a
* href="../../../ntlmhttpauth.html">jCIFS NTLM HTTP Authentication and
* the Network Explorer Servlet</a> related information.
* @version 0.9.1
*/
public class NtlmSsp implements NtlmFlags {
/**
* Calls the static {@link #authenticate(HttpServletRequest,
* HttpServletResponse, byte[])} method to perform NTLM authentication
* for the specified servlet request.
*
* @param req The request being serviced.
* @param resp The response.
* @param challenge The domain controller challenge.
* @throws IOException If an IO error occurs.
* @throws ServletException If an error occurs.
*/
public NtlmPasswordAuthentication doAuthentication(
HttpServletRequest req, HttpServletResponse resp, byte[] challenge)
throws IOException, ServletException {
return authenticate(req, resp, challenge);
}
/**
* Performs NTLM authentication for the servlet request.
*
* @param req The request being serviced.
* @param resp The response.
* @param challenge The domain controller challenge.
* @throws IOException If an IO error occurs.
* @throws ServletException If an error occurs.
*/
public static NtlmPasswordAuthentication authenticate(
HttpServletRequest req, HttpServletResponse resp, byte[] challenge)
throws IOException, ServletException {
String msg = req.getHeader("Authorization");
if (msg != null && msg.startsWith("NTLM ")) {
byte[] src = Base64Decoder.decodeToBytes(msg.substring(5));
if (src[8] == 1) {
Type1Message type1 = new Type1Message(src);
Type2Message type2 = new Type2Message(type1, challenge, null);
msg = Base64Encoder.encode(type2.toByteArray());
resp.setHeader( "WWW-Authenticate", "NTLM " + msg );
} else if (src[8] == 3) {
Type3Message type3 = new Type3Message(src);
byte[] lmResponse = type3.getLMResponse();
if (lmResponse == null) lmResponse = new byte[0];
byte[] ntResponse = type3.getNTResponse();
if (ntResponse == null) ntResponse = new byte[0];
return new NtlmPasswordAuthentication(type3.getDomain(),
type3.getUser(), challenge, lmResponse, ntResponse);
}
} else {
resp.setHeader("WWW-Authenticate", "NTLM");
resp.setHeader("Connection", "close");
}
resp.setStatus(HttpServletResponse.SC_UNAUTHORIZED);
resp.setContentLength( 0 );
resp.flushBuffer();
return null;
}
}