spring security JaasNameCallbackHandler 源码
spring security JaasNameCallbackHandler 代码
文件路径：/core/src/main/java/org/springframework/security/authentication/jaas/JaasNameCallbackHandler.java
/*
* 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
*
* 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.authentication.jaas;
import javax.security.auth.callback.Callback;
import javax.security.auth.callback.NameCallback;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.userdetails.UserDetails;
/**
* The most basic Callbacks to be handled when using a LoginContext from JAAS, are the
* NameCallback and PasswordCallback. Spring Security provides the JaasNameCallbackHandler
* specifically tailored to handling the NameCallback. <br>
*
* @author Ray Krueger
* @see <a href=
* "https://java.sun.com/j2se/1.4.2/docs/api/javax/security/auth/callback/Callback.html">Callback</a>
* @see <a href=
* "https://java.sun.com/j2se/1.4.2/docs/api/javax/security/auth/callback/NameCallback.html">NameCallback</a>
*/
public class JaasNameCallbackHandler implements JaasAuthenticationCallbackHandler {
/**
* If the callback passed to the 'handle' method is an instance of NameCallback, the
* JaasNameCallbackHandler will call,
* callback.setName(authentication.getPrincipal().toString()).
* @param callback
* @param authentication
*
*/
@Override
public void handle(Callback callback, Authentication authentication) {
if (callback instanceof NameCallback) {
((NameCallback) callback).setName(getUserName(authentication));
}
}
private String getUserName(Authentication authentication) {
Object principal = authentication.getPrincipal();
if (principal instanceof UserDetails) {
return ((UserDetails) principal).getUsername();
}
return principal.toString();
}
}
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