org.springframework.security.web.access.intercept.AuthorizationFilter Maven / Gradle / Ivy
/*
* Copyright 2002-2022 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
*
* https://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.web.access.intercept;
import java.io.IOException;
import java.util.function.Supplier;
import javax.servlet.DispatcherType;
import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.context.ApplicationEventPublisher;
import org.springframework.security.access.AccessDeniedException;
import org.springframework.security.authentication.AuthenticationCredentialsNotFoundException;
import org.springframework.security.authorization.AuthorizationDecision;
import org.springframework.security.authorization.AuthorizationEventPublisher;
import org.springframework.security.authorization.AuthorizationManager;
import org.springframework.security.authorization.event.AuthorizationDeniedEvent;
import org.springframework.security.authorization.event.AuthorizationGrantedEvent;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.security.core.context.SecurityContextHolderStrategy;
import org.springframework.util.Assert;
import org.springframework.web.filter.GenericFilterBean;
/**
* An authorization filter that restricts access to the URL using
* {@link AuthorizationManager}.
*
* @author Evgeniy Cheban
* @since 5.5
*/
public class AuthorizationFilter extends GenericFilterBean {
private SecurityContextHolderStrategy securityContextHolderStrategy = SecurityContextHolder
.getContextHolderStrategy();
private final AuthorizationManager authorizationManager;
private AuthorizationEventPublisher eventPublisher = AuthorizationFilter::noPublish;
private boolean observeOncePerRequest = true;
private boolean filterErrorDispatch = false;
private boolean filterAsyncDispatch = false;
/**
* Creates an instance.
* @param authorizationManager the {@link AuthorizationManager} to use
*/
public AuthorizationFilter(AuthorizationManager authorizationManager) {
Assert.notNull(authorizationManager, "authorizationManager cannot be null");
this.authorizationManager = authorizationManager;
}
@Override
public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain chain)
throws ServletException, IOException {
HttpServletRequest request = (HttpServletRequest) servletRequest;
HttpServletResponse response = (HttpServletResponse) servletResponse;
if (this.observeOncePerRequest && isApplied(request)) {
chain.doFilter(request, response);
return;
}
if (skipDispatch(request)) {
chain.doFilter(request, response);
return;
}
String alreadyFilteredAttributeName = getAlreadyFilteredAttributeName();
request.setAttribute(alreadyFilteredAttributeName, Boolean.TRUE);
try {
AuthorizationDecision decision = this.authorizationManager.check(this::getAuthentication, request);
this.eventPublisher.publishAuthorizationEvent(this::getAuthentication, request, decision);
if (decision != null && !decision.isGranted()) {
throw new AccessDeniedException("Access Denied");
}
chain.doFilter(request, response);
}
finally {
request.removeAttribute(alreadyFilteredAttributeName);
}
}
private boolean skipDispatch(HttpServletRequest request) {
if (DispatcherType.ERROR.equals(request.getDispatcherType()) && !this.filterErrorDispatch) {
return true;
}
if (DispatcherType.ASYNC.equals(request.getDispatcherType()) && !this.filterAsyncDispatch) {
return true;
}
return false;
}
private boolean isApplied(HttpServletRequest request) {
return request.getAttribute(getAlreadyFilteredAttributeName()) != null;
}
private String getAlreadyFilteredAttributeName() {
String name = getFilterName();
if (name == null) {
name = getClass().getName();
}
return name + ".APPLIED";
}
/**
* Sets the {@link SecurityContextHolderStrategy} to use. The default action is to use
* the {@link SecurityContextHolderStrategy} stored in {@link SecurityContextHolder}.
*
* @since 5.8
*/
public void setSecurityContextHolderStrategy(SecurityContextHolderStrategy securityContextHolderStrategy) {
Assert.notNull(securityContextHolderStrategy, "securityContextHolderStrategy cannot be null");
this.securityContextHolderStrategy = securityContextHolderStrategy;
}
private Authentication getAuthentication() {
Authentication authentication = this.securityContextHolderStrategy.getContext().getAuthentication();
if (authentication == null) {
throw new AuthenticationCredentialsNotFoundException(
"An Authentication object was not found in the SecurityContext");
}
return authentication;
}
/**
* Use this {@link AuthorizationEventPublisher} to publish
* {@link AuthorizationDeniedEvent}s and {@link AuthorizationGrantedEvent}s.
* @param eventPublisher the {@link ApplicationEventPublisher} to use
* @since 5.7
*/
public void setAuthorizationEventPublisher(AuthorizationEventPublisher eventPublisher) {
Assert.notNull(eventPublisher, "eventPublisher cannot be null");
this.eventPublisher = eventPublisher;
}
/**
* Gets the {@link AuthorizationManager} used by this filter
* @return the {@link AuthorizationManager}
*/
public AuthorizationManager getAuthorizationManager() {
return this.authorizationManager;
}
/**
* Sets whether to filter all dispatcher types.
* @param shouldFilterAllDispatcherTypes should filter all dispatcher types. Default
* is {@code false}
* @since 5.7
*/
public void setShouldFilterAllDispatcherTypes(boolean shouldFilterAllDispatcherTypes) {
this.observeOncePerRequest = !shouldFilterAllDispatcherTypes;
this.filterErrorDispatch = shouldFilterAllDispatcherTypes;
this.filterAsyncDispatch = shouldFilterAllDispatcherTypes;
}
private static void noPublish(Supplier authentication, T object,
AuthorizationDecision decision) {
}
public boolean isObserveOncePerRequest() {
return this.observeOncePerRequest;
}
/**
* Sets whether this filter apply only once per request. By default, this is
* true, meaning the filter will only execute once per request. Sometimes
* users may wish it to execute more than once per request, such as when JSP forwards
* are being used and filter security is desired on each included fragment of the HTTP
* request.
* @param observeOncePerRequest whether the filter should only be applied once per
* request
*/
public void setObserveOncePerRequest(boolean observeOncePerRequest) {
this.observeOncePerRequest = observeOncePerRequest;
}
/**
* If set to true, the filter will be applied to error dispatcher. Defaults to false.
* @param filterErrorDispatch whether the filter should be applied to error dispatcher
*/
public void setFilterErrorDispatch(boolean filterErrorDispatch) {
this.filterErrorDispatch = filterErrorDispatch;
}
/**
* If set to true, the filter will be applied to the async dispatcher. Defaults to
* false.
* @param filterAsyncDispatch whether the filter should be applied to async dispatch
*/
public void setFilterAsyncDispatch(boolean filterAsyncDispatch) {
this.filterAsyncDispatch = filterAsyncDispatch;
}
}