/*
* Copyright 2002-2016 the original author or authors.
*
* 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 samples.gae.security;
import com.google.appengine.api.users.User;
import org.springframework.context.MessageSource;
import org.springframework.context.MessageSourceAware;
import org.springframework.context.support.MessageSourceAccessor;
import org.springframework.security.authentication.AuthenticationProvider;
import org.springframework.security.authentication.DisabledException;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.AuthenticationException;
import org.springframework.security.core.SpringSecurityMessageSource;
import org.springframework.security.web.authentication.preauth.PreAuthenticatedAuthenticationToken;
import samples.gae.users.GaeUser;
import samples.gae.users.UserRegistry;
/**
* A simple authentication provider which interacts with {@code User} returned by the GAE
* {@code UserService}, and also the local persistent {@code UserRegistry} to build an
* application user principal.
* <p>
* If the user has been authenticated through google accounts, it will check if they are
* already registered and either load the existing user information or assign them a
* temporary identity with limited access until they have registered.
* <p>
* If the account has been disabled, a {@code DisabledException} will be raised.
*
* @author Luke Taylor
*/
public class GoogleAccountsAuthenticationProvider implements AuthenticationProvider,
MessageSourceAware {
protected MessageSourceAccessor messages = SpringSecurityMessageSource.getAccessor();
private UserRegistry userRegistry;
public Authentication authenticate(Authentication authentication)
throws AuthenticationException {
User googleUser = (User) authentication.getPrincipal();
GaeUser user = userRegistry.findUser(googleUser.getUserId());
if (user == null) {
// User not in registry. Needs to register
user = new GaeUser(googleUser.getUserId(), googleUser.getNickname(),
googleUser.getEmail());
}
if (!user.isEnabled()) {
throw new DisabledException("Account is disabled");
}
return new GaeUserAuthentication(user, authentication.getDetails());
}
/**
* Indicate that this provider only supports PreAuthenticatedAuthenticationToken
* (sub)classes.
*/
public final boolean supports(Class<?> authentication) {
return PreAuthenticatedAuthenticationToken.class.isAssignableFrom(authentication);
}
public void setUserRegistry(UserRegistry userRegistry) {
this.userRegistry = userRegistry;
}
public void setMessageSource(MessageSource messageSource) {
this.messages = new MessageSourceAccessor(messageSource);
}
}