spring security FirewalledResponse 源码
spring security FirewalledResponse 代码
文件路径：/web/src/main/java/org/springframework/security/web/firewall/FirewalledResponse.java
/*
* Copyright 2002-2018 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.firewall;
import java.io.IOException;
import jakarta.servlet.http.Cookie;
import jakarta.servlet.http.HttpServletResponse;
import jakarta.servlet.http.HttpServletResponseWrapper;
import org.springframework.util.Assert;
/**
* @author Luke Taylor
* @author Eddú Meléndez
* @author Gabriel Lavoie
* @author Luke Butters
*/
class FirewalledResponse extends HttpServletResponseWrapper {
private static final String LOCATION_HEADER = "Location";
private static final String SET_COOKIE_HEADER = "Set-Cookie";
FirewalledResponse(HttpServletResponse response) {
super(response);
}
@Override
public void sendRedirect(String location) throws IOException {
// TODO: implement pluggable validation, instead of simple blocklist.
// SEC-1790. Prevent redirects containing CRLF
validateCrlf(LOCATION_HEADER, location);
super.sendRedirect(location);
}
@Override
public void setHeader(String name, String value) {
validateCrlf(name, value);
super.setHeader(name, value);
}
@Override
public void addHeader(String name, String value) {
validateCrlf(name, value);
super.addHeader(name, value);
}
@Override
public void addCookie(Cookie cookie) {
if (cookie != null) {
validateCrlf(SET_COOKIE_HEADER, cookie.getName());
validateCrlf(SET_COOKIE_HEADER, cookie.getValue());
validateCrlf(SET_COOKIE_HEADER, cookie.getPath());
validateCrlf(SET_COOKIE_HEADER, cookie.getDomain());
validateCrlf(SET_COOKIE_HEADER, cookie.getComment());
}
super.addCookie(cookie);
}
void validateCrlf(String name, String value) {
Assert.isTrue(!hasCrlf(name) && !hasCrlf(value), () -> "Invalid characters (CR/LF) in header " + name);
}
private boolean hasCrlf(String value) {
return value != null && (value.indexOf('\n') != -1 || value.indexOf('\r') != -1);
}
}
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