/*
* Copyright (C) 2003-2009 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.web.login;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.net.URI;
import java.net.URISyntaxException;
import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.exoplatform.container.ExoContainer;
import org.exoplatform.container.web.AbstractHttpServlet;
import org.exoplatform.services.security.ConversationState;
import org.exoplatform.web.security.AuthenticationRegistry;
import org.exoplatform.web.security.security.AbstractTokenService;
import org.exoplatform.web.security.security.CookieTokenService;
import org.exoplatform.web.security.sso.SSOHelper;
import org.gatein.common.logging.Logger;
import org.gatein.common.logging.LoggerFactory;
import org.gatein.wci.ServletContainer;
import org.gatein.wci.ServletContainerFactory;
import org.gatein.wci.authentication.AuthenticationEvent;
import org.gatein.wci.authentication.AuthenticationEventType;
import org.gatein.wci.authentication.AuthenticationException;
import org.gatein.wci.authentication.AuthenticationListener;
import org.gatein.wci.security.Credentials;
/**
* The login servlet which proceeds as.
*
* 0. If user is already authenticated : nothing happens 1. When username and password are provided, a login is attempted 1.1 if
* login is successful the user is authenticated 1.2 if login fails the user is not authenticated and the login form is
* displayed with the user name filled 2. When username is provided, the login form is displayed with the user name filled 3.
* Finally if nothing is provided the login form is displayed
*
* @author <a href="mailto:alain.defrance@exoplatform.com">Alain Defrance</a>
* @author <a href="mailto:julien.viet@exoplatform.com">Julien Viet</a>
* @version $Revision$
*/
public class LoginServlet extends AbstractHttpServlet {
/**
*
*/
private static final long serialVersionUID = -1330051083735349589L;
/** . */
private static final int UNAUTHENTICATED = 0;
/** . */
private static final int AUTHENTICATED = 1;
/** . */
private static final int FAILED = 2;
/** . */
private static final Logger log = LoggerFactory.getLogger(LoginServlet.class);
/** . */
public static final String COOKIE_NAME = "rememberme";
/**
* Register WCI authentication listener, which is used to bind credentials to temporary authentication registry after each
* successful login
*
* @param config
* @throws ServletException
*/
@Override
protected void afterInit(ServletConfig config) throws ServletException {
ServletContainerFactory.getServletContainer().addAuthenticationListener(new AuthenticationListener() {
@Override
public void onEvent(AuthenticationEvent event) {
if (event.getType() == AuthenticationEventType.LOGIN) {
bindCredentialsToAuthenticationRegistry(getContainer(), event.getRequest(), event.getCredentials());
}
}
});
}
/**
* Extract the remember me token from the request or returns null.
*
* @param req the incoming request
* @return the token
*/
public static String getRememberMeTokenCookie(HttpServletRequest req) {
Cookie[] cookies = req.getCookies();
if (cookies != null) {
for (Cookie cookie : cookies) {
if (COOKIE_NAME.equals(cookie.getName())) {
return cookie.getValue();
}
}
}
return null;
}
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
try {
// We set the character encoding now to UTF-8 before obtaining parameters
req.setCharacterEncoding("UTF-8");
} catch (UnsupportedEncodingException e) {
log.error("Encoding not supported", e);
}
String username = req.getParameter("username");
String password = req.getParameter("password");
//
int status;
if (req.getRemoteUser() == null) {
if (username != null && password != null) {
Credentials credentials = new Credentials(username, password);
ServletContainer container = ServletContainerFactory.getServletContainer();
// This will login or send an AuthenticationException
try {
container.login(req, resp, credentials);
} catch (AuthenticationException e) {
log.debug("User authentication failed");
if (log.isTraceEnabled()) {
log.trace(e.getMessage(), e);
}
}
//
status = req.getRemoteUser() != null ? AUTHENTICATED : FAILED;
// If we are authenticated
if (status == AUTHENTICATED) {
if (log.isTraceEnabled()) {
log.trace("User authenticated successfuly through WCI. Will redirect to initialURI");
}
// Handle remember me
String rememberme = req.getParameter("rememberme");
if ("true".equals(rememberme)) {
// Create token for credentials
CookieTokenService tokenService = AbstractTokenService.getInstance(CookieTokenService.class);
String cookieToken = tokenService.createToken(credentials);
if (log.isDebugEnabled()) {
log.debug("Found a remember me request parameter, created a persistent token " + cookieToken
+ " for it and set it up " + "in the next response");
}
Cookie cookie = new Cookie(COOKIE_NAME, cookieToken);
cookie.setPath(req.getContextPath());
cookie.setMaxAge((int) tokenService.getValidityTime());
resp.addCookie(cookie);
}
}
} else {
log.debug("username or password not provided. Changing status to UNAUTHENTICATED");
status = UNAUTHENTICATED;
}
} else {
log.debug("User already authenticated. Will redirect to initialURI");
status = AUTHENTICATED;
}
// Obtain initial URI
String initialURI = req.getParameter("initialURI");
// Otherwise compute one
if (initialURI == null || initialURI.length() == 0) {
initialURI = req.getContextPath();
log.debug("No initial URI found, will use default " + initialURI + " instead ");
} else {
log.debug("Found initial URI " + initialURI);
}
try {
URI uri = new URI(initialURI);
if (uri.isAbsolute() && !(uri.getHost().equals(req.getServerName()))) {
log.warn("Cannot redirect to an URI outside of the current host when using a login redirect. Redirecting to the portal context path instead.");
initialURI = req.getContextPath();
}
} catch (URISyntaxException e) {
log.warn("Initial URI in login link is malformed. Redirecting to the portal context path instead.");
initialURI = req.getContextPath();
}
// Redirect to initialURI
if (status == AUTHENTICATED) {
// Response may be already committed in case of SAML or other SSO providers
if (!resp.isCommitted()) {
resp.sendRedirect(resp.encodeRedirectURL(initialURI));
}
} else {
if (status == FAILED) {
req.setAttribute("org.gatein.portal.login.error", "whatever");
}
// Show login form or redirect to SSO url (/portal/sso) if SSO is enabled
req.setAttribute("org.gatein.portal.login.initial_uri", initialURI);
SSOHelper ssoHelper = getContainer().getComponentInstanceOfType(SSOHelper.class);
String disabledUser = (String)req.getAttribute(FilterDisabledLoginModule.DISABLED_USER_NAME);
boolean meetDisabledUser = disabledUser == null ? false : (disabledUser.equals(username));
if(ssoHelper.skipJSPRedirection() && meetDisabledUser) {
resp.setContentType("text/html; charset=UTF-8");
getServletContext().getRequestDispatcher("/login/jsp/disabled.jsp").include(req, resp);
} else if (ssoHelper.skipJSPRedirection()) {
String ssoRedirectUrl = req.getContextPath() + ssoHelper.getSSORedirectURLSuffix();
ssoRedirectUrl = resp.encodeRedirectURL(ssoRedirectUrl);
if (log.isTraceEnabled()) {
log.trace("Redirected to SSO login URL: " + ssoRedirectUrl);
}
resp.sendRedirect(ssoRedirectUrl);
} else {
resp.setContentType("text/html; charset=UTF-8");
getServletContext().getRequestDispatcher("/login/jsp/login.jsp").include(req, resp);
}
}
}
@Override
protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
doGet(req, resp);
}
/**
* Add credentials to {@link ConversationState}.
*
* @param credentials the credentials
*/
private static void bindCredentialsToAuthenticationRegistry(ExoContainer exoContainer, HttpServletRequest req,
Credentials credentials) {
AuthenticationRegistry authRegistry = (AuthenticationRegistry) exoContainer
.getComponentInstanceOfType(AuthenticationRegistry.class);
if (log.isTraceEnabled()) {
log.trace("Binding credentials to temporary authentication registry for user " + credentials.getUsername());
}
authRegistry.setCredentials(req, credentials);
}
}