/*
* JBoss, Home of Professional Open Source.
* Copyright 2013 Red Hat, Inc., and individual contributors
* as indicated by the @author tags.
*
* 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.
*/
package io.undertow.security.impl;
import io.undertow.UndertowLogger;
import io.undertow.security.api.AuthenticationMechanism;
import io.undertow.security.api.SecurityContext;
import io.undertow.security.idm.Account;
import io.undertow.security.idm.IdentityManager;
import io.undertow.security.idm.PasswordCredential;
import io.undertow.server.DefaultResponseListener;
import io.undertow.server.HttpServerExchange;
import io.undertow.server.handlers.form.FormData;
import io.undertow.server.handlers.form.FormDataParser;
import io.undertow.server.handlers.form.FormParserFactory;
import io.undertow.server.session.Session;
import io.undertow.util.Headers;
import io.undertow.util.Methods;
import io.undertow.util.RedirectBuilder;
import io.undertow.util.Sessions;
import java.io.IOException;
import static io.undertow.UndertowMessages.MESSAGES;
import static io.undertow.util.StatusCodes.FOUND;
import static io.undertow.util.StatusCodes.TEMPORARY_REDIRECT;
/**
* @author Stuart Douglas
*/
public class FormAuthenticationMechanism implements AuthenticationMechanism {
public static final String LOCATION_ATTRIBUTE = FormAuthenticationMechanism.class.getName() + ".LOCATION";
public static final String DEFAULT_POST_LOCATION = "/j_security_check";
private final String name;
private final String loginPage;
private final String errorPage;
private final String postLocation;
private final FormParserFactory formParserFactory;
public FormAuthenticationMechanism(final String name, final String loginPage, final String errorPage) {
this(FormParserFactory.builder().build(), name, loginPage, errorPage);
}
public FormAuthenticationMechanism(final String name, final String loginPage, final String errorPage, final String postLocation) {
this(FormParserFactory.builder().build(), name, loginPage, errorPage, postLocation);
}
public FormAuthenticationMechanism(final FormParserFactory formParserFactory, final String name, final String loginPage, final String errorPage) {
this(formParserFactory, name, loginPage, errorPage, DEFAULT_POST_LOCATION);
}
public FormAuthenticationMechanism(final FormParserFactory formParserFactory, final String name, final String loginPage, final String errorPage, final String postLocation) {
this.name = name;
this.loginPage = loginPage;
this.errorPage = errorPage;
this.postLocation = postLocation;
this.formParserFactory = formParserFactory;
}
@Override
public AuthenticationMechanismOutcome authenticate(final HttpServerExchange exchange,
final SecurityContext securityContext) {
if (exchange.getRequestURI().endsWith(postLocation) && exchange.getRequestMethod().equals(Methods.POST)) {
return runFormAuth(exchange, securityContext);
} else {
return AuthenticationMechanismOutcome.NOT_ATTEMPTED;
}
}
public AuthenticationMechanismOutcome runFormAuth(final HttpServerExchange exchange, final SecurityContext securityContext) {
final FormDataParser parser = formParserFactory.createParser(exchange);
if (parser == null) {
UndertowLogger.REQUEST_LOGGER.debug("Could not authenticate as no form parser is present");
// TODO - May need a better error signaling mechanism here to prevent repeated attempts.
return AuthenticationMechanismOutcome.NOT_AUTHENTICATED;
}
try {
final FormData data = parser.parseBlocking();
final FormData.FormValue jUsername = data.getFirst("j_username");
final FormData.FormValue jPassword = data.getFirst("j_password");
if (jUsername == null || jPassword == null) {
UndertowLogger.REQUEST_LOGGER.debug("Could not authenticate as username or password was not present in the posted result");
return AuthenticationMechanismOutcome.NOT_AUTHENTICATED;
}
final String userName = jUsername.getValue();
final String password = jPassword.getValue();
AuthenticationMechanismOutcome outcome = null;
PasswordCredential credential = new PasswordCredential(password.toCharArray());
try {
IdentityManager identityManager = securityContext.getIdentityManager();
Account account = identityManager.verify(userName, credential);
if (account != null) {
securityContext.authenticationComplete(account, name, true);
outcome = AuthenticationMechanismOutcome.AUTHENTICATED;
} else {
securityContext.authenticationFailed(MESSAGES.authenticationFailed(userName), name);
}
} finally {
if (outcome == AuthenticationMechanismOutcome.AUTHENTICATED) {
handleRedirectBack(exchange);
exchange.endExchange();
}
return outcome != null ? outcome : AuthenticationMechanismOutcome.NOT_AUTHENTICATED;
}
} catch (IOException e) {
throw new RuntimeException(e);
}
}
protected void handleRedirectBack(final HttpServerExchange exchange) {
final Session session = Sessions.getSession(exchange);
if (session != null) {
final String location = (String) session.removeAttribute(LOCATION_ATTRIBUTE);
if(location != null) {
exchange.addDefaultResponseListener(new DefaultResponseListener() {
@Override
public boolean handleDefaultResponse(final HttpServerExchange exchange) {
FormAuthenticationMechanism.sendRedirect(exchange, location);
exchange.setResponseCode(FOUND);
exchange.endExchange();
return true;
}
});
}
}
}
public ChallengeResult sendChallenge(final HttpServerExchange exchange, final SecurityContext securityContext) {
if (exchange.getRequestURI().endsWith(postLocation) && exchange.getRequestMethod().equals(Methods.POST)) {
// This method would no longer be called if authentication had already occurred.
Integer code = servePage(exchange, errorPage);
return new ChallengeResult(true, code);
} else {
// we need to store the URL
storeInitialLocation(exchange);
// TODO - Rather than redirecting, in order to make this mechanism compatible with the other mechanisms we need to
// return the actual error page not a redirect.
Integer code = servePage(exchange, loginPage);
return new ChallengeResult(true, code);
}
}
protected void storeInitialLocation(final HttpServerExchange exchange) {
Session session = Sessions.getOrCreateSession(exchange);
session.setAttribute(LOCATION_ATTRIBUTE, RedirectBuilder.redirect(exchange, exchange.getRelativePath()));
}
protected Integer servePage(final HttpServerExchange exchange, final String location) {
sendRedirect(exchange, location);
return TEMPORARY_REDIRECT;
}
static void sendRedirect(final HttpServerExchange exchange, final String location) {
// TODO - String concatenation to construct URLS is extremely error prone - switch to a URI which will better handle this.
String loc = exchange.getRequestScheme() + "://" + exchange.getHostAndPort() + location;
exchange.getResponseHeaders().put(Headers.LOCATION, loc);
}
}