src/main/java/org/onap/clamp/clds/ClampServlet.java

   1 /*-
   2  * ============LICENSE_START=======================================================
   3  * ONAP CLAMP
   4  * ================================================================================
   5  * Copyright (C) 2018 AT&T Intellectual Property. All rights
   6  *                             reserved.
   7  * ================================================================================
   8  * Modifications Copyright (c) 2019 Samsung
   9  * ================================================================================
  10  * Licensed under the Apache License, Version 2.0 (the "License");
  11  * you may not use this file except in compliance with the License.
  12  * You may obtain a copy of the License at
  13  *
  14  * http://www.apache.org/licenses/LICENSE-2.0
  15  *
  16  * Unless required by applicable law or agreed to in writing, software
  17  * distributed under the License is distributed on an "AS IS" BASIS,
  18  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  19  * See the License for the specific language governing permissions and
  20  * limitations under the License.
  21  * ============LICENSE_END============================================
  22  * ===================================================================
  23  *
  24  */
  25
  26 package org.onap.clamp.clds;
  27
  28 import com.att.eelf.configuration.EELFLogger;
  29 import com.att.eelf.configuration.EELFManager;
  30
  31 import java.io.IOException;
  32 import java.security.Principal;
  33 import java.util.ArrayList;
  34 import java.util.List;
  35
  36 import javax.servlet.ServletException;
  37 import javax.servlet.http.HttpServletRequest;
  38 import javax.servlet.http.HttpServletResponse;
  39
  40 import org.apache.camel.component.servlet.CamelHttpTransportServlet;
  41 import org.onap.clamp.authorization.SecureServicePermission;
  42 import org.springframework.context.ApplicationContext;
  43 import org.springframework.http.HttpStatus;
  44 import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
  45 import org.springframework.security.core.Authentication;
  46 import org.springframework.security.core.GrantedAuthority;
  47 import org.springframework.security.core.authority.SimpleGrantedAuthority;
  48 import org.springframework.security.core.context.SecurityContextHolder;
  49 import org.springframework.security.core.userdetails.User;
  50 import org.springframework.web.context.support.WebApplicationContextUtils;
  51
  52 public class ClampServlet extends CamelHttpTransportServlet {
  53
  54     /**
  55      * The serial version ID.
  56      */
  57     private static final long serialVersionUID = -4198841134910211542L;
  58
  59     private static final EELFLogger logger = EELFManager.getInstance().getLogger(ClampServlet.class);
  60     private static final String PERM_INSTANCE = "clamp.config.security.permission.instance";
  61     private static final String PERM_CL = "clamp.config.security.permission.type.cl";
  62     private static final String PERM_TEMPLATE = "clamp.config.security.permission.type.template";
  63     private static final String PERM_VF = "clamp.config.security.permission.type.filter.vf";
  64     private static final String PERM_MANAGE = "clamp.config.security.permission.type.cl.manage";
  65     private static final String PERM_TOSCA = "clamp.config.security.permission.type.tosca";
  66     private static final String AUTHENTICATION_CLASS = "clamp.config.security.authentication.class";
  67     private static final String READ = "read";
  68     private static final String UPDATE = "update";
  69
  70     private static List<SecureServicePermission> permissionList;
  71
  72     private synchronized Class loadDynamicAuthenticationClass() {
  73         try {
  74             String authenticationObject = WebApplicationContextUtils.getWebApplicationContext(getServletContext())
  75                     .getEnvironment().getProperty(AUTHENTICATION_CLASS);
  76             return Class.forName(authenticationObject);
  77         } catch (ClassNotFoundException e) {
  78             logger.error(
  79                     "Exception caught when attempting to create associated class of config:" + AUTHENTICATION_CLASS, e);
  80             return Object.class;
  81         }
  82     }
  83
  84     private synchronized List<SecureServicePermission> getPermissionList() {
  85         if (permissionList == null) {
  86             permissionList = new ArrayList<>();
  87             ApplicationContext applicationContext = WebApplicationContextUtils
  88                     .getWebApplicationContext(getServletContext());
  89             String cldsPermissionInstance = applicationContext.getEnvironment().getProperty(PERM_INSTANCE);
  90             permissionList.add(SecureServicePermission.create(applicationContext.getEnvironment().getProperty(PERM_CL),
  91                     cldsPermissionInstance, READ));
  92             permissionList.add(SecureServicePermission.create(applicationContext.getEnvironment().getProperty(PERM_CL),
  93                     cldsPermissionInstance, UPDATE));
  94             permissionList.add(SecureServicePermission.create(
  95                     applicationContext.getEnvironment().getProperty(PERM_TEMPLATE), cldsPermissionInstance, READ));
  96             permissionList.add(SecureServicePermission.create(
  97                     applicationContext.getEnvironment().getProperty(PERM_TEMPLATE), cldsPermissionInstance, UPDATE));
  98             permissionList.add(SecureServicePermission.create(applicationContext.getEnvironment().getProperty(PERM_VF),
  99                     cldsPermissionInstance, "*"));
 100             permissionList.add(SecureServicePermission
 101                     .create(applicationContext.getEnvironment().getProperty(PERM_MANAGE), cldsPermissionInstance, "*"));
 102             permissionList.add(SecureServicePermission
 103                     .create(applicationContext.getEnvironment().getProperty(PERM_TOSCA), cldsPermissionInstance, READ));
 104             permissionList.add(SecureServicePermission
 105                     .create(applicationContext.getEnvironment().getProperty(PERM_TOSCA),
 106                             cldsPermissionInstance, UPDATE));
 107         }
 108         return permissionList;
 109     }
 110
 111     /**
 112      * When AAF is enabled, request object will contain a cadi Wrapper, so queries
 113      * to isUserInRole will invoke a http call to AAF server.
 114      */
 115     @Override
 116     protected void doService(HttpServletRequest request, HttpServletResponse response) {
 117         Principal principal = request.getUserPrincipal();
 118         if (loadDynamicAuthenticationClass().isInstance(principal)) {
 119             // When AAF is enabled, there is a need to provision the permissions to Spring
 120             // system
 121             List<GrantedAuthority> grantedAuths = new ArrayList<>();
 122             for (SecureServicePermission perm : getPermissionList()) {
 123                 String permString = perm.toString();
 124                 if (request.isUserInRole(permString)) {
 125                     grantedAuths.add(new SimpleGrantedAuthority(permString));
 126                 }
 127             }
 128             Authentication auth = new UsernamePasswordAuthenticationToken(new User(principal.getName(), "",
 129                     grantedAuths), "", grantedAuths);
 130             SecurityContextHolder.getContext().setAuthentication(auth);
 131         }
 132         try {
 133             super.doService(request, response);
 134         } catch (ServletException | IOException ioe) {
 135             logger.error("Exception caught when executing doService in servlet", ioe);
 136             try {
 137                 response.sendError(HttpStatus.INTERNAL_SERVER_ERROR.value());
 138             } catch (IOException e) {
 139                 logger.error("Exception caught when executing HTTP sendError in servlet", e);
 140             }
 141         }
 142     }
 143 }