/*
* (C) Copyright 2006-2011 Nuxeo SA (http://nuxeo.com/) and others.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* Contributors:
* bstefanescu
*/
package org.nuxeo.ecm.webengine.jaxrs.login;
import java.io.IOException;
import java.security.Principal;
import java.util.Set;
import javax.security.auth.login.LoginContext;
import javax.security.auth.login.LoginException;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletRequestWrapper;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.codec.binary.Base64;
import org.nuxeo.common.utils.StringUtils;
import org.nuxeo.ecm.core.api.local.ClientLoginModule;
import org.nuxeo.ecm.webengine.jaxrs.HttpFilter;
import org.nuxeo.runtime.api.Framework;
/**
* Filter using the {@link SimpleLoginModule} to authenticate a request.
*
* @author <a href="mailto:bs@nuxeo.com">Bogdan Stefanescu</a>
*/
public class AuthenticationFilter extends HttpFilter {
public static final String DEFAULT_SECURITY_DOMAIN = "nuxeo-client-login";
protected String domain = DEFAULT_SECURITY_DOMAIN;
protected boolean autoPrompt = true;
protected String realmName = "Nuxeo";
@Override
public void init(FilterConfig filterConfig) throws ServletException {
String v = filterConfig.getInitParameter("securityDomain");
if (v != null) {
domain = v;
}
v = filterConfig.getInitParameter("realmName");
if (v != null) {
realmName = v;
}
}
@Override
public void run(HttpServletRequest request, HttpServletResponse response, FilterChain chain) throws IOException,
ServletException {
LoginContext lc = null;
if (request.getUserPrincipal() == null) {
try {
lc = doLogin(request, response);
request = wrapRequest(request, lc);
} catch (LoginException e) {
// login failed
handleLoginFailure(request, response, e);
return;
}
}
try {
chain.doFilter(request, response);
} finally {
ClientLoginModule.getThreadLocalLogin().clear();
if (lc != null) {
// a null lc may indicate an anonymous login
try {
lc.logout();
} catch (LoginException e) {
throw new RuntimeException(e);
}
}
}
}
@Override
public void destroy() {
}
protected String[] retrieveBasicLogin(HttpServletRequest httpRequest) {
String auth = httpRequest.getHeader("authorization");
if (auth != null && auth.toLowerCase().startsWith("basic")) {
int idx = auth.indexOf(' ');
String b64userpassword = auth.substring(idx + 1);
byte[] clearUp = Base64.decodeBase64(b64userpassword);
String userpassword = new String(clearUp);
String[] up = StringUtils.split(userpassword, ':', false);
if (up.length != 2) {
return null;
}
return up;
}
return null;
}
protected LoginContext doLogin(HttpServletRequest request, HttpServletResponse response) throws LoginException {
String[] login = retrieveBasicLogin(request);
if (login != null) {
return Framework.login(login[0], login[1]);
}
// TODO no login provided - use anonymous ?
// for now no anonymous user supported - we require a login
throw new LoginException("User must login");
// return null;
}
protected void handleLoginFailure(HttpServletRequest request, HttpServletResponse response, LoginException e) {
String s = "Basic realm=\"" + realmName + "\"";
response.setHeader("WWW-Authenticate", s);
response.setStatus(401);
}
protected HttpServletRequest wrapRequest(HttpServletRequest request, LoginContext lc) {
Set<Principal> set = lc.getSubject().getPrincipals();
if (!set.isEmpty()) {
final Principal principal = set.iterator().next();
return new HttpServletRequestWrapper(request) {
@Override
public Principal getUserPrincipal() {
return principal;
}
};
}
return request;
}
}