/*
* JBoss, Home of Professional Open Source.
* Copyright 2008, Red Hat Middleware LLC, and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* 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.jboss.web.tomcat.security.jaspi.modules;
import java.io.IOException;
import java.io.InputStream;
import java.io.UnsupportedEncodingException;
import java.security.Principal;
import java.util.Enumeration;
import java.util.Iterator;
import java.util.Locale;
import javax.security.auth.Subject;
import javax.security.auth.message.AuthException;
import javax.security.auth.message.AuthStatus;
import javax.security.auth.message.MessageInfo;
import javax.servlet.RequestDispatcher;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletResponse;
import org.apache.catalina.Context;
import org.apache.catalina.Realm;
import org.apache.catalina.Session;
import org.apache.catalina.authenticator.Constants;
import org.apache.catalina.authenticator.SavedRequest;
import org.apache.catalina.connector.Request;
import org.apache.catalina.connector.Response;
import org.apache.catalina.deploy.LoginConfig;
import org.apache.catalina.util.StringManager;
import org.apache.coyote.ActionCode;
import org.apache.tomcat.util.buf.ByteChunk;
import org.apache.tomcat.util.buf.CharChunk;
import org.apache.tomcat.util.buf.MessageBytes;
import org.apache.tomcat.util.http.MimeHeaders;
import org.jboss.logging.Logger;
/**
* Server auth module for FORM authentication
* @author Anil.Saldhana@redhat.com
* @since Oct 7, 2008
*/
public class HTTPFormServerAuthModule extends TomcatServerAuthModule
{
private static Logger log = Logger.getLogger(HTTPFormServerAuthModule.class);
protected Context context;
protected boolean cache = false;
protected static final StringManager sm =
StringManager.getManager(Constants.Package);
/**
* The number of random bytes to include when generating a
* session identifier.
*/
protected static final int SESSION_ID_BYTES = 16;
protected String delgatingLoginContextName = null;
public HTTPFormServerAuthModule()
{
}
public HTTPFormServerAuthModule(String delgatingLoginContextName)
{
super();
this.delgatingLoginContextName = delgatingLoginContextName;
}
public AuthStatus secureResponse(MessageInfo messageInfo, Subject serviceSubject)
throws AuthException
{
throw new RuntimeException("Not Applicable");
}
public AuthStatus validateRequest(MessageInfo messageInfo, Subject clientSubject,
Subject serviceSubject) throws AuthException
{
Request request = (Request) messageInfo.getRequestMessage();
Response response = (Response) messageInfo.getResponseMessage();
Principal principal;
context = request.getContext();
LoginConfig config = context.getLoginConfig();
// References to objects we will need later
Session session = null;
//Lets find out if the cache is enabled or not
cache = (Boolean) messageInfo.getMap().get("CACHE");
// Have we authenticated this user before but have caching disabled?
if (!cache) {
session = request.getSessionInternal(true);
log.debug("Checking for reauthenticate in session " + session);
String username =
(String) session.getNote(Constants.SESS_USERNAME_NOTE);
String password =
(String) session.getNote(Constants.SESS_PASSWORD_NOTE);
if ((username != null) && (password != null)) {
log.debug("Reauthenticating username '" + username + "'");
principal =
context.getRealm().authenticate(username, password);
if (principal != null) {
session.setNote(Constants.FORM_PRINCIPAL_NOTE, principal);
if (!matchRequest(request)) {
registerWithCallbackHandler(principal, username, password);
/*register(request, response, principal,
Constants.FORM_METHOD,
username, password);*/
return AuthStatus.SUCCESS;
}
}
log.trace("Reauthentication failed, proceed normally");
}
}
// Is this the re-submit of the original request URI after successful
// authentication? If so, forward the *original* request instead.
if (matchRequest(request)) {
session = request.getSessionInternal(true);
log.trace("Restore request from session '"
+ session.getIdInternal()
+ "'");
principal = (Principal)
session.getNote(Constants.FORM_PRINCIPAL_NOTE);
registerWithCallbackHandler(principal,
(String) session.getNote(Constants.SESS_USERNAME_NOTE),
(String) session.getNote(Constants.SESS_PASSWORD_NOTE));
/*register(request, response, principal, Constants.FORM_METHOD,
(String) session.getNote(Constants.SESS_USERNAME_NOTE),
(String) session.getNote(Constants.SESS_PASSWORD_NOTE));*/
// If we're caching principals we no longer need the username
// and password in the session, so remove them
if (cache) {
session.removeNote(Constants.SESS_USERNAME_NOTE);
session.removeNote(Constants.SESS_PASSWORD_NOTE);
}
if (restoreRequest(request, session)) {
log.trace("Proceed to restored request");
return (AuthStatus.SUCCESS);
} else {
log.trace("Restore of original request failed");
try
{
response.sendError(HttpServletResponse.SC_BAD_REQUEST);
}
catch (IOException e)
{
log.error(e.getLocalizedMessage(),e);
}
return AuthStatus.FAILURE;
}
}
// Acquire references to objects we will need to evaluate
MessageBytes uriMB = MessageBytes.newInstance();
CharChunk uriCC = uriMB.getCharChunk();
uriCC.setLimit(-1);
String contextPath = request.getContextPath();
String requestURI = request.getDecodedRequestURI();
response.setContext(request.getContext());
// Is this the action request from the login page?
boolean loginAction =
requestURI.startsWith(contextPath) &&
requestURI.endsWith(Constants.FORM_ACTION);
// No -- Save this request and redirect to the form login page
if (!loginAction) {
session = request.getSessionInternal(true);
log.trace("Save request in session '" + session.getIdInternal() + "'");
try {
saveRequest(request, session);
} catch (IOException ioe) {
log.trace("Request body too big to save during authentication");
try
{
response.sendError(HttpServletResponse.SC_FORBIDDEN,
sm.getString("authenticator.requestBodyTooBig"));
}
catch (IOException e)
{
log.error("Exception in Form authentication:",e);
throw new AuthException(e.getLocalizedMessage());
}
return (AuthStatus.FAILURE);
}
forwardToLoginPage(request, response, config);
return (AuthStatus.SEND_CONTINUE);
}
// Yes -- Validate the specified credentials and redirect
// to the error page if they are not correct
Realm realm = context.getRealm();
String characterEncoding = request.getCharacterEncoding();
if (characterEncoding != null) {
try
{
request.setCharacterEncoding(characterEncoding);
}
catch (UnsupportedEncodingException e)
{
log.error(e.getLocalizedMessage(), e);
}
}
String username = request.getParameter(Constants.FORM_USERNAME);
String password = request.getParameter(Constants.FORM_PASSWORD);
log.trace("Authenticating username '" + username + "'");
principal = realm.authenticate(username, password);
if (principal == null) {
forwardToErrorPage(request, response, config);
return (AuthStatus.FAILURE);
}
log.trace("Authentication of '" + username + "' was successful");
if (session == null)
session = request.getSessionInternal(false);
if (session == null) {
log.trace
("User took so long to log on the session expired");
try
{
response.sendError(HttpServletResponse.SC_REQUEST_TIMEOUT,
sm.getString("authenticator.sessionExpired"));
}
catch (IOException e)
{
log.error(e.getLocalizedMessage(),e);
}
return (AuthStatus.FAILURE);
}
// Save the authenticated Principal in our session
session.setNote(Constants.FORM_PRINCIPAL_NOTE, principal);
// Save the username and password as well
session.setNote(Constants.SESS_USERNAME_NOTE, username);
session.setNote(Constants.SESS_PASSWORD_NOTE, password);
// Redirect the user to the original request URI (which will cause
// the original request to be restored)
requestURI = savedRequestURL(session);
log.trace("Redirecting to original '" + requestURI + "'");
try
{
if (requestURI == null)
response.sendError(HttpServletResponse.SC_BAD_REQUEST,
sm.getString("authenticator.formlogin"));
else
response.sendRedirect(response.encodeRedirectURL(requestURI));
}
catch(IOException ioe)
{
log.error(ioe.getLocalizedMessage(),ioe);
}
return (AuthStatus.FAILURE);
}
/**
* Does this request match the saved one (so that it must be the redirect
* we signalled after successful authentication?
*
* @param request The request to be verified
*/
protected boolean matchRequest(Request request)
{
// Has a session been created?
Session session = request.getSessionInternal(false);
if (session == null)
return (false);
// Is there a saved request?
SavedRequest sreq = (SavedRequest)
session.getNote(Constants.FORM_REQUEST_NOTE);
if (sreq == null)
return (false);
// Is there a saved principal?
if (session.getNote(Constants.FORM_PRINCIPAL_NOTE) == null)
return (false);
// Does the request URI match?
String requestURI = request.getRequestURI();
if (requestURI == null)
return (false);
return (requestURI.equals(sreq.getRequestURI()));
}
/**
* Restore the original request from information stored in our session.
* If the original request is no longer present (because the session
* timed out), return <code>false</code>; otherwise, return
* <code>true</code>.
*
* @param request The request to be restored
* @param session The session containing the saved information
*/
@SuppressWarnings("unchecked")
protected boolean restoreRequest(Request request, Session session)
{
// Retrieve and remove the SavedRequest object from our session
SavedRequest saved = (SavedRequest)
session.getNote(Constants.FORM_REQUEST_NOTE);
session.removeNote(Constants.FORM_REQUEST_NOTE);
session.removeNote(Constants.FORM_PRINCIPAL_NOTE);
if (saved == null)
return (false);
// Modify our current request to reflect the original one
request.clearCookies();
Iterator cookies = saved.getCookies();
while (cookies.hasNext()) {
request.addCookie((Cookie) cookies.next());
}
MimeHeaders rmh = request.getCoyoteRequest().getMimeHeaders();
rmh.recycle();
boolean cachable = "GET".equalsIgnoreCase(saved.getMethod()) ||
"HEAD".equalsIgnoreCase(saved.getMethod());
Iterator names = saved.getHeaderNames();
while (names.hasNext()) {
String name = (String) names.next();
// The browser isn't expecting this conditional response now.
// Assuming that it can quietly recover from an unexpected 412.
// BZ 43687
if(!("If-Modified-Since".equalsIgnoreCase(name) ||
(cachable && "If-None-Match".equalsIgnoreCase(name)))) {
Iterator values = saved.getHeaderValues(name);
while (values.hasNext()) {
rmh.addValue(name).setString( (String)values.next() );
}
}
}
request.clearLocales();
Iterator locales = saved.getLocales();
while (locales.hasNext()) {
request.addLocale((Locale) locales.next());
}
request.getCoyoteRequest().getParameters().recycle();
if ("POST".equalsIgnoreCase(saved.getMethod())) {
ByteChunk body = saved.getBody();
if (body != null) {
request.getCoyoteRequest().action
(ActionCode.ACTION_REQ_SET_BODY_REPLAY, body);
// Set content type
MessageBytes contentType = MessageBytes.newInstance();
// If no content type specified, use default for POST
String savedContentType = saved.getContentType();
if (savedContentType == null) {
savedContentType = "application/x-www-form-urlencoded";
}
contentType.setString(savedContentType);
request.getCoyoteRequest().setContentType(contentType);
}
}
request.getCoyoteRequest().method().setString(saved.getMethod());
request.getCoyoteRequest().queryString().setString
(saved.getQueryString());
request.getCoyoteRequest().requestURI().setString
(saved.getRequestURI());
return (true);
}
/**
* Save the original request information into our session.
*
* @param request The request to be saved
* @param session The session to contain the saved information
* @throws IOException
*/
@SuppressWarnings("unchecked")
protected void saveRequest(Request request, Session session)
throws IOException {
// Create and populate a SavedRequest object for this request
SavedRequest saved = new SavedRequest();
Cookie cookies[] = request.getCookies();
if (cookies != null) {
for (int i = 0; i < cookies.length; i++)
saved.addCookie(cookies[i]);
}
Enumeration names = request.getHeaderNames();
while (names.hasMoreElements()) {
String name = (String) names.nextElement();
Enumeration values = request.getHeaders(name);
while (values.hasMoreElements()) {
String value = (String) values.nextElement();
saved.addHeader(name, value);
}
}
Enumeration locales = request.getLocales();
while (locales.hasMoreElements()) {
Locale locale = (Locale) locales.nextElement();
saved.addLocale(locale);
}
if ("POST".equalsIgnoreCase(request.getMethod())) {
ByteChunk body = new ByteChunk();
body.setLimit(request.getConnector().getMaxSavePostSize());
byte[] buffer = new byte[4096];
int bytesRead;
InputStream is = request.getInputStream();
while ( (bytesRead = is.read(buffer) ) >= 0) {
body.append(buffer, 0, bytesRead);
}
saved.setBody(body);
saved.setContentType(request.getContentType());
}
saved.setMethod(request.getMethod());
saved.setQueryString(request.getQueryString());
saved.setRequestURI(request.getRequestURI());
// Stash the SavedRequest in our session for later use
session.setNote(Constants.FORM_REQUEST_NOTE, saved);
}
/**
* Return the request URI (with the corresponding query string, if any)
* from the saved request so that we can redirect to it.
*
* @param session Our current session
*/
protected String savedRequestURL(Session session)
{
SavedRequest saved =
(SavedRequest) session.getNote(Constants.FORM_REQUEST_NOTE);
if (saved == null)
return (null);
StringBuffer sb = new StringBuffer(saved.getRequestURI());
if (saved.getQueryString() != null) {
sb.append('?');
sb.append(saved.getQueryString());
}
return (sb.toString());
}
//Forward Methods
/**
* Called to forward to the login page
*
* @param request Request we are processing
* @param response Response we are creating
* @param config Login configuration describing how authentication
* should be performed
*/
protected void forwardToLoginPage(Request request, Response response, LoginConfig config)
{
RequestDispatcher disp =
context.getServletContext().getRequestDispatcher
(config.getLoginPage());
try {
disp.forward(request.getRequest(), response.getResponse());
response.finishResponse();
} catch (Throwable t) {
log.warn("Unexpected error forwarding to login page", t);
}
}
/**
* Called to forward to the error page
*
* @param request Request we are processing
* @param response Response we are creating
* @param config Login configuration describing how authentication
* should be performed
*/
protected void forwardToErrorPage(Request request, Response response, LoginConfig config)
{
RequestDispatcher disp =
context.getServletContext().getRequestDispatcher
(config.getErrorPage());
try {
disp.forward(request.getRequest(), response.getResponse());
} catch (Throwable t) {
log.warn("Unexpected error forwarding to error page", t);
}
}
}