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