spring security CsrfConfigurer 源码
spring security CsrfConfigurer 代码
文件路径：/config/src/main/java/org/springframework/security/config/annotation/web/configurers/CsrfConfigurer.java
/*
* Copyright 2002-2021 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.config.annotation.web.configurers;
import java.util.ArrayList;
import java.util.LinkedHashMap;
import java.util.List;
import jakarta.servlet.http.HttpServletRequest;
import org.springframework.context.ApplicationContext;
import org.springframework.http.HttpMethod;
import org.springframework.security.access.AccessDeniedException;
import org.springframework.security.config.annotation.web.AbstractRequestMatcherRegistry;
import org.springframework.security.config.annotation.web.HttpSecurityBuilder;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.web.access.AccessDeniedHandler;
import org.springframework.security.web.access.AccessDeniedHandlerImpl;
import org.springframework.security.web.access.DelegatingAccessDeniedHandler;
import org.springframework.security.web.authentication.session.SessionAuthenticationStrategy;
import org.springframework.security.web.csrf.CsrfAuthenticationStrategy;
import org.springframework.security.web.csrf.CsrfFilter;
import org.springframework.security.web.csrf.CsrfLogoutHandler;
import org.springframework.security.web.csrf.CsrfTokenRepository;
import org.springframework.security.web.csrf.HttpSessionCsrfTokenRepository;
import org.springframework.security.web.csrf.LazyCsrfTokenRepository;
import org.springframework.security.web.csrf.MissingCsrfTokenException;
import org.springframework.security.web.servlet.util.matcher.MvcRequestMatcher;
import org.springframework.security.web.session.InvalidSessionAccessDeniedHandler;
import org.springframework.security.web.session.InvalidSessionStrategy;
import org.springframework.security.web.util.matcher.AndRequestMatcher;
import org.springframework.security.web.util.matcher.NegatedRequestMatcher;
import org.springframework.security.web.util.matcher.OrRequestMatcher;
import org.springframework.security.web.util.matcher.RequestMatcher;
import org.springframework.util.Assert;
/**
* Adds
* <a href="https://www.owasp.org/index.php/Cross-Site_Request_Forgery_(CSRF)" >CSRF</a>
* protection for the methods as specified by
* {@link #requireCsrfProtectionMatcher(RequestMatcher)}.
*
* <h2>Security Filters</h2>
*
* The following Filters are populated
*
* <ul>
* <li>{@link CsrfFilter}</li>
* </ul>
*
* <h2>Shared Objects Created</h2>
*
* No shared objects are created.
*
* <h2>Shared Objects Used</h2>
*
* <ul>
* <li>{@link ExceptionHandlingConfigurer#accessDeniedHandler(AccessDeniedHandler)} is
* used to determine how to handle CSRF attempts</li>
* <li>{@link InvalidSessionStrategy}</li>
* </ul>
*
* @author Rob Winch
* @author Michael Vitz
* @since 3.2
*/
public final class CsrfConfigurer<H extends HttpSecurityBuilder<H>>
extends AbstractHttpConfigurer<CsrfConfigurer<H>, H> {
private CsrfTokenRepository csrfTokenRepository = new LazyCsrfTokenRepository(new HttpSessionCsrfTokenRepository());
private RequestMatcher requireCsrfProtectionMatcher = CsrfFilter.DEFAULT_CSRF_MATCHER;
private List<RequestMatcher> ignoredCsrfProtectionMatchers = new ArrayList<>();
private SessionAuthenticationStrategy sessionAuthenticationStrategy;
private final ApplicationContext context;
/**
* Creates a new instance
* @see HttpSecurity#csrf()
*/
public CsrfConfigurer(ApplicationContext context) {
this.context = context;
}
/**
* Specify the {@link CsrfTokenRepository} to use. The default is an
* {@link HttpSessionCsrfTokenRepository} wrapped by {@link LazyCsrfTokenRepository}.
* @param csrfTokenRepository the {@link CsrfTokenRepository} to use
* @return the {@link CsrfConfigurer} for further customizations
*/
public CsrfConfigurer<H> csrfTokenRepository(CsrfTokenRepository csrfTokenRepository) {
Assert.notNull(csrfTokenRepository, "csrfTokenRepository cannot be null");
this.csrfTokenRepository = csrfTokenRepository;
return this;
}
/**
* Specify the {@link RequestMatcher} to use for determining when CSRF should be
* applied. The default is to ignore GET, HEAD, TRACE, OPTIONS and process all other
* requests.
* @param requireCsrfProtectionMatcher the {@link RequestMatcher} to use
* @return the {@link CsrfConfigurer} for further customizations
*/
public CsrfConfigurer<H> requireCsrfProtectionMatcher(RequestMatcher requireCsrfProtectionMatcher) {
Assert.notNull(requireCsrfProtectionMatcher, "requireCsrfProtectionMatcher cannot be null");
this.requireCsrfProtectionMatcher = requireCsrfProtectionMatcher;
return this;
}
/**
* <p>
* Allows specifying {@link HttpServletRequest} that should not use CSRF Protection
* even if they match the {@link #requireCsrfProtectionMatcher(RequestMatcher)}.
* </p>
*
* <p>
* For example, the following configuration will ensure CSRF protection ignores:
* </p>
* <ul>
* <li>Any GET, HEAD, TRACE, OPTIONS (this is the default)</li>
* <li>We also explicitly state to ignore any request that starts with "/sockjs/"</li>
* </ul>
*
* <pre>
* http
* .csrf()
* .ignoringAntMatchers("/sockjs/**")
* .and()
* ...
* </pre>
*
* @since 4.0
*/
public CsrfConfigurer<H> ignoringAntMatchers(String... antPatterns) {
return new IgnoreCsrfProtectionRegistry(this.context).antMatchers(antPatterns).and();
}
/**
* <p>
* Allows specifying {@link HttpServletRequest}s that should not use CSRF Protection
* even if they match the {@link #requireCsrfProtectionMatcher(RequestMatcher)}.
* </p>
*
* <p>
* For example, the following configuration will ensure CSRF protection ignores:
* </p>
* <ul>
* <li>Any GET, HEAD, TRACE, OPTIONS (this is the default)</li>
* <li>We also explicitly state to ignore any request that has a "X-Requested-With:
* XMLHttpRequest" header</li>
* </ul>
*
* <pre>
* http
* .csrf()
* .ignoringRequestMatchers((request) -> "XMLHttpRequest".equals(request.getHeader("X-Requested-With")))
* .and()
* ...
* </pre>
*
* @since 5.1
*/
public CsrfConfigurer<H> ignoringRequestMatchers(RequestMatcher... requestMatchers) {
return new IgnoreCsrfProtectionRegistry(this.context).requestMatchers(requestMatchers).and();
}
/**
* <p>
* Specify the {@link SessionAuthenticationStrategy} to use. The default is a
* {@link CsrfAuthenticationStrategy}.
* </p>
* @param sessionAuthenticationStrategy the {@link SessionAuthenticationStrategy} to
* use
* @return the {@link CsrfConfigurer} for further customizations
* @since 5.2
*/
public CsrfConfigurer<H> sessionAuthenticationStrategy(
SessionAuthenticationStrategy sessionAuthenticationStrategy) {
Assert.notNull(sessionAuthenticationStrategy, "sessionAuthenticationStrategy cannot be null");
this.sessionAuthenticationStrategy = sessionAuthenticationStrategy;
return this;
}
@SuppressWarnings("unchecked")
@Override
public void configure(H http) {
CsrfFilter filter = new CsrfFilter(this.csrfTokenRepository);
RequestMatcher requireCsrfProtectionMatcher = getRequireCsrfProtectionMatcher();
if (requireCsrfProtectionMatcher != null) {
filter.setRequireCsrfProtectionMatcher(requireCsrfProtectionMatcher);
}
AccessDeniedHandler accessDeniedHandler = createAccessDeniedHandler(http);
if (accessDeniedHandler != null) {
filter.setAccessDeniedHandler(accessDeniedHandler);
}
LogoutConfigurer<H> logoutConfigurer = http.getConfigurer(LogoutConfigurer.class);
if (logoutConfigurer != null) {
logoutConfigurer.addLogoutHandler(new CsrfLogoutHandler(this.csrfTokenRepository));
}
SessionManagementConfigurer<H> sessionConfigurer = http.getConfigurer(SessionManagementConfigurer.class);
if (sessionConfigurer != null) {
sessionConfigurer.addSessionAuthenticationStrategy(getSessionAuthenticationStrategy());
}
filter = postProcess(filter);
http.addFilter(filter);
}
/**
* Gets the final {@link RequestMatcher} to use by combining the
* {@link #requireCsrfProtectionMatcher(RequestMatcher)} and any {@link #ignore()}.
* @return the {@link RequestMatcher} to use
*/
private RequestMatcher getRequireCsrfProtectionMatcher() {
if (this.ignoredCsrfProtectionMatchers.isEmpty()) {
return this.requireCsrfProtectionMatcher;
}
return new AndRequestMatcher(this.requireCsrfProtectionMatcher,
new NegatedRequestMatcher(new OrRequestMatcher(this.ignoredCsrfProtectionMatchers)));
}
/**
* Gets the default {@link AccessDeniedHandler} from the
* {@link ExceptionHandlingConfigurer#getAccessDeniedHandler(HttpSecurityBuilder)} or
* create a {@link AccessDeniedHandlerImpl} if not available.
* @param http the {@link HttpSecurityBuilder}
* @return the {@link AccessDeniedHandler}
*/
@SuppressWarnings("unchecked")
private AccessDeniedHandler getDefaultAccessDeniedHandler(H http) {
ExceptionHandlingConfigurer<H> exceptionConfig = http.getConfigurer(ExceptionHandlingConfigurer.class);
AccessDeniedHandler handler = null;
if (exceptionConfig != null) {
handler = exceptionConfig.getAccessDeniedHandler(http);
}
if (handler == null) {
handler = new AccessDeniedHandlerImpl();
}
return handler;
}
/**
* Gets the default {@link InvalidSessionStrategy} from the
* {@link SessionManagementConfigurer#getInvalidSessionStrategy()} or null if not
* available.
* @param http the {@link HttpSecurityBuilder}
* @return the {@link InvalidSessionStrategy}
*/
@SuppressWarnings("unchecked")
private InvalidSessionStrategy getInvalidSessionStrategy(H http) {
SessionManagementConfigurer<H> sessionManagement = http.getConfigurer(SessionManagementConfigurer.class);
if (sessionManagement == null) {
return null;
}
return sessionManagement.getInvalidSessionStrategy();
}
/**
* Creates the {@link AccessDeniedHandler} from the result of
* {@link #getDefaultAccessDeniedHandler(HttpSecurityBuilder)} and
* {@link #getInvalidSessionStrategy(HttpSecurityBuilder)}. If
* {@link #getInvalidSessionStrategy(HttpSecurityBuilder)} is non-null, then a
* {@link DelegatingAccessDeniedHandler} is used in combination with
* {@link InvalidSessionAccessDeniedHandler} and the
* {@link #getDefaultAccessDeniedHandler(HttpSecurityBuilder)}. Otherwise, only
* {@link #getDefaultAccessDeniedHandler(HttpSecurityBuilder)} is used.
* @param http the {@link HttpSecurityBuilder}
* @return the {@link AccessDeniedHandler}
*/
private AccessDeniedHandler createAccessDeniedHandler(H http) {
InvalidSessionStrategy invalidSessionStrategy = getInvalidSessionStrategy(http);
AccessDeniedHandler defaultAccessDeniedHandler = getDefaultAccessDeniedHandler(http);
if (invalidSessionStrategy == null) {
return defaultAccessDeniedHandler;
}
InvalidSessionAccessDeniedHandler invalidSessionDeniedHandler = new InvalidSessionAccessDeniedHandler(
invalidSessionStrategy);
LinkedHashMap<Class<? extends AccessDeniedException>, AccessDeniedHandler> handlers = new LinkedHashMap<>();
handlers.put(MissingCsrfTokenException.class, invalidSessionDeniedHandler);
return new DelegatingAccessDeniedHandler(handlers, defaultAccessDeniedHandler);
}
/**
* Gets the {@link SessionAuthenticationStrategy} to use. If none was set by the user
* a {@link CsrfAuthenticationStrategy} is created.
* @return the {@link SessionAuthenticationStrategy}
* @since 5.2
*/
private SessionAuthenticationStrategy getSessionAuthenticationStrategy() {
if (this.sessionAuthenticationStrategy != null) {
return this.sessionAuthenticationStrategy;
}
return new CsrfAuthenticationStrategy(this.csrfTokenRepository);
}
/**
* Allows registering {@link RequestMatcher} instances that should be ignored (even if
* the {@link HttpServletRequest} matches the
* {@link CsrfConfigurer#requireCsrfProtectionMatcher(RequestMatcher)}.
*
* @author Rob Winch
* @since 4.0
*/
private class IgnoreCsrfProtectionRegistry extends AbstractRequestMatcherRegistry<IgnoreCsrfProtectionRegistry> {
IgnoreCsrfProtectionRegistry(ApplicationContext context) {
setApplicationContext(context);
}
@Override
public MvcMatchersIgnoreCsrfProtectionRegistry mvcMatchers(HttpMethod method, String... mvcPatterns) {
List<MvcRequestMatcher> mvcMatchers = createMvcMatchers(method, mvcPatterns);
CsrfConfigurer.this.ignoredCsrfProtectionMatchers.addAll(mvcMatchers);
return new MvcMatchersIgnoreCsrfProtectionRegistry(getApplicationContext(), mvcMatchers);
}
@Override
public MvcMatchersIgnoreCsrfProtectionRegistry mvcMatchers(String... mvcPatterns) {
return mvcMatchers(null, mvcPatterns);
}
CsrfConfigurer<H> and() {
return CsrfConfigurer.this;
}
@Override
protected IgnoreCsrfProtectionRegistry chainRequestMatchers(List<RequestMatcher> requestMatchers) {
CsrfConfigurer.this.ignoredCsrfProtectionMatchers.addAll(requestMatchers);
return this;
}
}
/**
* An {@link IgnoreCsrfProtectionRegistry} that allows optionally configuring the
* {@link MvcRequestMatcher#setMethod(HttpMethod)}
*
* @author Rob Winch
*/
private final class MvcMatchersIgnoreCsrfProtectionRegistry extends IgnoreCsrfProtectionRegistry {
private final List<MvcRequestMatcher> mvcMatchers;
private MvcMatchersIgnoreCsrfProtectionRegistry(ApplicationContext context,
List<MvcRequestMatcher> mvcMatchers) {
super(context);
this.mvcMatchers = mvcMatchers;
}
IgnoreCsrfProtectionRegistry servletPath(String servletPath) {
for (MvcRequestMatcher matcher : this.mvcMatchers) {
matcher.setServletPath(servletPath);
}
return this;
}
}
}
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