/*
* Copyright (C) 2012 eXo Platform SAS.
*
* This 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 software 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 software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.exoplatform.webui;
import javax.portlet.PortletRequest;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
import org.exoplatform.services.log.ExoLogger;
import org.exoplatform.services.log.Log;
import org.exoplatform.webui.application.WebuiRequestContext;
import org.gatein.common.util.UUIDGenerator;
/**
* @author <a href="mailto:phuong.vu@exoplatform.com">Vu Viet Phuong</a>
* @version $Id$
*
*/
public class CSRFTokenUtil {
public static final String CSRF_TOKEN = "gtn:csrf";
private static Log log = ExoLogger.getExoLogger(CSRFTokenUtil.class);
private static final UUIDGenerator generator = new UUIDGenerator();
public static boolean check() throws Exception {
HttpServletRequest request = getRequest();
if (request != null) {
String sessionToken = getToken();
String reqToken = request.getParameter(CSRF_TOKEN);
return reqToken != null && reqToken.equals(sessionToken);
} else {
log.warn("No HttpServletRequest found, can't check CSRF");
return false;
}
}
public static String getToken() throws Exception {
HttpServletRequest request = getRequest();
if (request != null) {
HttpSession session = request.getSession();
String token = (String) session.getAttribute(CSRF_TOKEN);
if (token == null) {
token = generator.generateKey();
session.setAttribute(CSRF_TOKEN, token);
}
return token;
} else {
log.warn("No HttpServletRequest found, can't generate CSRF token");
return null;
}
}
private static HttpServletRequest getRequest() throws Exception {
WebuiRequestContext context = WebuiRequestContext.getCurrentInstance();
if (context != null && context.getRequest() instanceof PortletRequest) {
context = (WebuiRequestContext) context.getParentAppRequestContext();
}
if (context != null) {
return context.getRequest();
} else {
log.warn("Can't find portal context");
return null;
}
}
}