| /* |
| * 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.pac4j.filter; |
| |
| import org.apache.knox.gateway.audit.api.Action; |
| import org.apache.knox.gateway.audit.api.ActionOutcome; |
| import org.apache.knox.gateway.audit.api.AuditService; |
| import org.apache.knox.gateway.audit.api.AuditServiceFactory; |
| import org.apache.knox.gateway.audit.api.Auditor; |
| 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.security.PrimaryPrincipal; |
| import org.pac4j.core.config.Config; |
| import org.pac4j.core.context.JEEContext; |
| import org.pac4j.core.profile.CommonProfile; |
| import org.pac4j.core.profile.ProfileManager; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| 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 java.io.IOException; |
| import java.security.PrivilegedActionException; |
| import java.security.PrivilegedExceptionAction; |
| import java.util.Optional; |
| |
| /** |
| * <p>This filter retrieves the authenticated user saved by the pac4j provider and injects it into the J2E HTTP request.</p> |
| * |
| * @since 0.8.0 |
| */ |
| public class Pac4jIdentityAdapter implements Filter { |
| |
| private static final Logger logger = LoggerFactory.getLogger(Pac4jIdentityAdapter.class); |
| |
| public static final String PAC4J_ID_ATTRIBUTE = "pac4j.id_attribute"; |
| private static final String PAC4J_CONFIG = "pac4j.config"; |
| |
| private static AuditService auditService = AuditServiceFactory.getAuditService(); |
| private static Auditor auditor = auditService.getAuditor( |
| AuditConstants.DEFAULT_AUDITOR_NAME, AuditConstants.KNOX_SERVICE_NAME, |
| AuditConstants.KNOX_COMPONENT_NAME ); |
| |
| private String testIdentifier; |
| |
| private String idAttribute; |
| |
| @Override |
| public void init( FilterConfig filterConfig ) throws ServletException { |
| idAttribute = filterConfig.getInitParameter(PAC4J_ID_ATTRIBUTE); |
| } |
| |
| @Override |
| public void destroy() { |
| } |
| |
| @Override |
| public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain chain) |
| throws IOException, ServletException { |
| |
| final HttpServletRequest request = (HttpServletRequest) servletRequest; |
| final HttpServletResponse response = (HttpServletResponse) servletResponse; |
| final JEEContext context = new JEEContext(request, response, |
| ((Config)request.getAttribute(PAC4J_CONFIG)).getSessionStore()); |
| final ProfileManager<CommonProfile> manager = new ProfileManager<>(context); |
| final Optional<CommonProfile> optional = manager.get(true); |
| if (optional.isPresent()) { |
| CommonProfile profile = optional.get(); |
| logger.debug("User authenticated as: {}", profile); |
| manager.remove(true); |
| String id = null; |
| if (idAttribute != null) { |
| Object attribute = profile.getAttribute(idAttribute); |
| if (attribute != null) { |
| id = attribute.toString(); |
| } |
| if (id == null) { |
| logger.error("Invalid attribute_id: {} configured to be used as principal" |
| + " falling back to default id", idAttribute); |
| } |
| } |
| if (id == null) { |
| id = profile.getId(); |
| } |
| testIdentifier = id; |
| PrimaryPrincipal pp = new PrimaryPrincipal(id); |
| Subject subject = new Subject(); |
| subject.getPrincipals().add(pp); |
| auditService.getContext().setUsername(id); |
| String sourceUri = (String)request.getAttribute( AbstractGatewayFilter.SOURCE_REQUEST_CONTEXT_URL_ATTRIBUTE_NAME ); |
| auditor.audit(Action.AUTHENTICATION, sourceUri, ResourceType.URI, ActionOutcome.SUCCESS); |
| |
| doAs(request, response, chain, subject); |
| } |
| } |
| |
| private void doAs(final ServletRequest request, |
| final ServletResponse response, final FilterChain chain, Subject subject) |
| throws IOException, ServletException { |
| try { |
| Subject.doAs( |
| subject, |
| new PrivilegedExceptionAction<Object>() { |
| @Override |
| 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); |
| } |
| } |
| } |
| |
| /** |
| * For tests only. |
| * @param auditService AuditService to set |
| */ |
| public static void setAuditService(AuditService auditService) { |
| Pac4jIdentityAdapter.auditService = auditService; |
| } |
| |
| /** |
| * For tests only. |
| * @param auditor Auditor to set |
| */ |
| public static void setAuditor(Auditor auditor) { |
| Pac4jIdentityAdapter.auditor = auditor; |
| } |
| |
| /** |
| * For tests only. |
| * @return testIdentifier |
| */ |
| public String getTestIdentifier() { |
| return testIdentifier; |
| } |
| } |