/*
* Copyright 2004, 2005, 2006 Acegi Technology Pty Limited
*
* 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 org.springframework.security.access.vote;
import java.util.Collection;
import org.springframework.security.access.AccessDecisionVoter;
import org.springframework.security.access.ConfigAttribute;
import org.springframework.security.authentication.AuthenticationTrustResolver;
import org.springframework.security.authentication.AuthenticationTrustResolverImpl;
import org.springframework.security.core.Authentication;
import org.springframework.util.Assert;
/**
* Votes if a {@link ConfigAttribute#getAttribute()} of
* <code>IS_AUTHENTICATED_FULLY</code> or <code>IS_AUTHENTICATED_REMEMBERED</code> or
* <code>IS_AUTHENTICATED_ANONYMOUSLY</code> is present. This list is in order of most
* strict checking to least strict checking.
* <p>
* The current <code>Authentication</code> will be inspected to determine if the principal
* has a particular level of authentication. The "FULLY" authenticated option means the
* user is authenticated fully (i.e.
* {@link org.springframework.security.authentication.AuthenticationTrustResolver#isAnonymous(Authentication)}
* is false and
* {@link org.springframework.security.authentication.AuthenticationTrustResolver#isRememberMe(Authentication)}
* is false). The "REMEMBERED" will grant access if the principal was either authenticated
* via remember-me OR is fully authenticated. The "ANONYMOUSLY" will grant access if the
* principal was authenticated via remember-me, OR anonymously, OR via full
* authentication.
* <p>
* All comparisons and prefixes are case sensitive.
*
* @author Ben Alex
*/
public class AuthenticatedVoter implements AccessDecisionVoter<Object> {
// ~ Static fields/initializers
// =====================================================================================
public static final String IS_AUTHENTICATED_FULLY = "IS_AUTHENTICATED_FULLY";
public static final String IS_AUTHENTICATED_REMEMBERED = "IS_AUTHENTICATED_REMEMBERED";
public static final String IS_AUTHENTICATED_ANONYMOUSLY = "IS_AUTHENTICATED_ANONYMOUSLY";
// ~ Instance fields
// ================================================================================================
private AuthenticationTrustResolver authenticationTrustResolver = new AuthenticationTrustResolverImpl();
// ~ Methods
// ========================================================================================================
private boolean isFullyAuthenticated(Authentication authentication) {
return (!authenticationTrustResolver.isAnonymous(authentication) && !authenticationTrustResolver
.isRememberMe(authentication));
}
public void setAuthenticationTrustResolver(
AuthenticationTrustResolver authenticationTrustResolver) {
Assert.notNull(authenticationTrustResolver,
"AuthenticationTrustResolver cannot be set to null");
this.authenticationTrustResolver = authenticationTrustResolver;
}
public boolean supports(ConfigAttribute attribute) {
if ((attribute.getAttribute() != null)
&& (IS_AUTHENTICATED_FULLY.equals(attribute.getAttribute())
|| IS_AUTHENTICATED_REMEMBERED.equals(attribute.getAttribute()) || IS_AUTHENTICATED_ANONYMOUSLY
.equals(attribute.getAttribute()))) {
return true;
}
else {
return false;
}
}
/**
* This implementation supports any type of class, because it does not query the
* presented secure object.
*
* @param clazz the secure object type
*
* @return always {@code true}
*/
public boolean supports(Class<?> clazz) {
return true;
}
public int vote(Authentication authentication, Object object,
Collection<ConfigAttribute> attributes) {
int result = ACCESS_ABSTAIN;
for (ConfigAttribute attribute : attributes) {
if (this.supports(attribute)) {
result = ACCESS_DENIED;
if (IS_AUTHENTICATED_FULLY.equals(attribute.getAttribute())) {
if (isFullyAuthenticated(authentication)) {
return ACCESS_GRANTED;
}
}
if (IS_AUTHENTICATED_REMEMBERED.equals(attribute.getAttribute())) {
if (authenticationTrustResolver.isRememberMe(authentication)
|| isFullyAuthenticated(authentication)) {
return ACCESS_GRANTED;
}
}
if (IS_AUTHENTICATED_ANONYMOUSLY.equals(attribute.getAttribute())) {
if (authenticationTrustResolver.isAnonymous(authentication)
|| isFullyAuthenticated(authentication)
|| authenticationTrustResolver.isRememberMe(authentication)) {
return ACCESS_GRANTED;
}
}
}
}
return result;
}
}