spring security CsrfAuthenticationStrategy 源码
spring security CsrfAuthenticationStrategy 代码
文件路径：/web/src/main/java/org/springframework/security/web/csrf/CsrfAuthenticationStrategy.java
/*
* Copyright 2002-2013 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.csrf;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.security.core.Authentication;
import org.springframework.security.web.authentication.session.SessionAuthenticationException;
import org.springframework.security.web.authentication.session.SessionAuthenticationStrategy;
import org.springframework.util.Assert;
/**
* {@link CsrfAuthenticationStrategy} is in charge of removing the {@link CsrfToken} upon
* authenticating. A new {@link CsrfToken} will then be generated by the framework upon
* the next request.
*
* @author Rob Winch
* @since 3.2
*/
public final class CsrfAuthenticationStrategy implements SessionAuthenticationStrategy {
private final Log logger = LogFactory.getLog(getClass());
private final CsrfTokenRepository csrfTokenRepository;
/**
* Creates a new instance
* @param csrfTokenRepository the {@link CsrfTokenRepository} to use
*/
public CsrfAuthenticationStrategy(CsrfTokenRepository csrfTokenRepository) {
Assert.notNull(csrfTokenRepository, "csrfTokenRepository cannot be null");
this.csrfTokenRepository = csrfTokenRepository;
}
@Override
public void onAuthentication(Authentication authentication, HttpServletRequest request,
HttpServletResponse response) throws SessionAuthenticationException {
boolean containsToken = this.csrfTokenRepository.loadToken(request) != null;
if (containsToken) {
this.csrfTokenRepository.saveToken(null, request, response);
CsrfToken newToken = this.csrfTokenRepository.generateToken(request);
this.csrfTokenRepository.saveToken(newToken, request, response);
request.setAttribute(CsrfToken.class.getName(), newToken);
request.setAttribute(newToken.getParameterName(), newToken);
this.logger.debug("Replaced CSRF Token");
}
}
}
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