| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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 |
| * |
| * http://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.apache.ambari.server.security; |
| |
| import java.io.IOException; |
| |
| import javax.servlet.ServletException; |
| import javax.servlet.http.HttpServletRequest; |
| import javax.servlet.http.HttpServletResponse; |
| |
| import org.apache.ambari.server.configuration.Configuration; |
| import org.apache.ambari.server.security.authentication.kerberos.AmbariKerberosAuthenticationProperties; |
| import org.springframework.security.core.AuthenticationException; |
| import org.springframework.security.web.AuthenticationEntryPoint; |
| import org.springframework.stereotype.Component; |
| |
| @Component |
| public class AmbariEntryPoint implements AuthenticationEntryPoint { |
| |
| /** |
| * A Boolean value declaring whether Kerberos authentication has been enabled (<code>true</code>) |
| * or not (<code>false</code>). |
| * <p> |
| * This value determines the behavior this entry point when authentication fails. |
| */ |
| private final boolean kerberosAuthenticationEnabled; |
| |
| public AmbariEntryPoint(Configuration configuration) { |
| AmbariKerberosAuthenticationProperties kerberosAuthenticationProperties = (configuration == null) |
| ? null |
| : configuration.getKerberosAuthenticationProperties(); |
| |
| kerberosAuthenticationEnabled = (kerberosAuthenticationProperties != null) && kerberosAuthenticationProperties.isKerberosAuthenticationEnabled(); |
| } |
| |
| @Override |
| public void commence(HttpServletRequest request, HttpServletResponse response, AuthenticationException authException) throws IOException, ServletException { |
| /* ***************************************************************************************** |
| * If Kerberos authentication is enabled (authentication.kerberos.enabled = true), respond such |
| * that the client is challenged to Negotiate and reissue the request with a Kerberos token. |
| * This response is an HTTP 401 status with the "WWW-Authenticate: Negotiate" header. |
| * |
| * If Kerberos authentication is not enabled, return an HTTP 403 status. |
| * ****************************************************************************************** */ |
| if (kerberosAuthenticationEnabled) { |
| response.setHeader("WWW-Authenticate", "Negotiate"); |
| response.sendError(HttpServletResponse.SC_UNAUTHORIZED, "Authentication requested"); |
| } else { |
| response.sendError(HttpServletResponse.SC_FORBIDDEN, authException.getMessage()); |
| } |
| } |
| } |