| /* |
| * 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.knox.gateway.hadoopauth.filter; |
| |
| import java.io.IOException; |
| import java.security.PrivilegedActionException; |
| import java.security.PrivilegedExceptionAction; |
| |
| import javax.security.auth.Subject; |
| import javax.servlet.Filter; |
| import javax.servlet.FilterChain; |
| import javax.servlet.FilterConfig; |
| import javax.servlet.ServletException; |
| import javax.servlet.ServletRequest; |
| import javax.servlet.ServletResponse; |
| import javax.servlet.http.HttpServletRequest; |
| import javax.servlet.http.HttpServletResponse; |
| |
| import org.apache.knox.gateway.security.PrimaryPrincipal; |
| import org.apache.knox.gateway.audit.api.AuditService; |
| import org.apache.knox.gateway.audit.api.AuditServiceFactory; |
| import org.apache.knox.gateway.audit.api.ResourceType; |
| import org.apache.knox.gateway.audit.log4j.audit.AuditConstants; |
| import org.apache.knox.gateway.filter.AbstractGatewayFilter; |
| import org.apache.knox.gateway.hadoopauth.HadoopAuthMessages; |
| import org.apache.knox.gateway.i18n.messages.MessagesFactory; |
| import org.apache.knox.gateway.audit.api.Action; |
| import org.apache.knox.gateway.audit.api.ActionOutcome; |
| import org.apache.knox.gateway.audit.api.Auditor; |
| |
| public class HadoopAuthPostFilter implements Filter { |
| |
| private static HadoopAuthMessages log = MessagesFactory.get( HadoopAuthMessages.class ); |
| private static AuditService auditService = AuditServiceFactory.getAuditService(); |
| private static Auditor auditor = auditService.getAuditor( |
| AuditConstants.DEFAULT_AUDITOR_NAME, AuditConstants.KNOX_SERVICE_NAME, |
| AuditConstants.KNOX_COMPONENT_NAME ); |
| |
| @Override |
| public void init( FilterConfig filterConfig ) throws ServletException { |
| } |
| |
| @Override |
| public void destroy() { |
| } |
| |
| @Override |
| public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) |
| throws IOException, ServletException { |
| HttpServletRequest httpRequest = (HttpServletRequest)request; |
| String principal = httpRequest.getRemoteUser(); |
| if (principal != null) { |
| Subject subject = new Subject(); |
| subject.getPrincipals().add(new PrimaryPrincipal(principal)); |
| log.hadoopAuthAssertedPrincipal(principal); |
| auditService.getContext().setUsername( principal ); //KM: Audit Fix |
| String sourceUri = (String)request.getAttribute( AbstractGatewayFilter.SOURCE_REQUEST_CONTEXT_URL_ATTRIBUTE_NAME ); |
| auditor.audit( Action.AUTHENTICATION , sourceUri, ResourceType.URI, ActionOutcome.SUCCESS ); |
| doAs(httpRequest, response, chain, subject); |
| } |
| else { |
| ((HttpServletResponse)response).sendError(HttpServletResponse.SC_FORBIDDEN, "User not authenticated"); |
| } |
| } |
| |
| private void doAs(final ServletRequest request, final ServletResponse response, final FilterChain chain, Subject subject) |
| throws IOException, ServletException { |
| try { |
| Subject.doAs( |
| subject, |
| new PrivilegedExceptionAction<Object>() { |
| public Object run() throws Exception { |
| chain.doFilter(request, response); |
| return null; |
| } |
| } |
| ); |
| } |
| catch (PrivilegedActionException e) { |
| Throwable t = e.getCause(); |
| if (t instanceof IOException) { |
| throw (IOException) t; |
| } |
| else if (t instanceof ServletException) { |
| throw (ServletException) t; |
| } |
| else { |
| throw new ServletException(t); |
| } |
| } |
| } |
| |
| } |