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 fj.data.Array;
  32 import java.io.IOException;
  33 import java.security.Principal;
  34 import java.util.ArrayList;
  35 import java.util.Arrays;
  36 import java.util.List;
  37
  38 import javax.servlet.ServletException;
  39 import javax.servlet.http.HttpServletRequest;
  40 import javax.servlet.http.HttpServletResponse;
  41
  42 import org.apache.camel.component.servlet.CamelHttpTransportServlet;
  43 import org.onap.clamp.authorization.SecureServicePermission;
  44 import org.springframework.context.ApplicationContext;
  45 import org.springframework.http.HttpStatus;
  46 import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
  47 import org.springframework.security.core.Authentication;
  48 import org.springframework.security.core.GrantedAuthority;
  49 import org.springframework.security.core.authority.SimpleGrantedAuthority;
  50 import org.springframework.security.core.context.SecurityContextHolder;
  51 import org.springframework.security.core.userdetails.User;
  52 import org.springframework.web.context.support.WebApplicationContextUtils;
  53
  54 public class ClampServlet extends CamelHttpTransportServlet {
  55
  56     /**
  57      * The serial version ID.
  58      */
  59     private static final long serialVersionUID = -4198841134910211542L;
  60
  61     private static final EELFLogger logger = EELFManager.getInstance().getLogger(ClampServlet.class);
  62     private static final String PERM_INSTANCE = "clamp.config.security.permission.instance";
  63     private static final String PERM_CL = "clamp.config.security.permission.type.cl";
  64     private static final String PERM_TEMPLATE = "clamp.config.security.permission.type.template";
  65     private static final String PERM_VF = "clamp.config.security.permission.type.filter.vf";
  66     private static final String PERM_MANAGE = "clamp.config.security.permission.type.cl.manage";
  67     private static final String PERM_TOSCA = "clamp.config.security.permission.type.tosca";
  68     private static final String AUTHENTICATION_CLASS = "clamp.config.security.authentication.class";
  69     private static final String READ = "read";
  70     private static final String UPDATE = "update";
  71
  72     private static List<SecureServicePermission> permissionList;
  73
  74     private synchronized String[] loadDynamicAuthenticationClasses() {
  75         String[] authenticationObjects = WebApplicationContextUtils.getWebApplicationContext(getServletContext())
  76                 .getEnvironment().getProperty(AUTHENTICATION_CLASS).split(",");
  77         Arrays.stream(authenticationObjects).forEach(className -> className.trim());
  78         return authenticationObjects;
  79     }
  80
  81     private synchronized List<SecureServicePermission> getPermissionList() {
  82         if (permissionList == null) {
  83             permissionList = new ArrayList<>();
  84             ApplicationContext applicationContext = WebApplicationContextUtils
  85                     .getWebApplicationContext(getServletContext());
  86             String cldsPermissionInstance = applicationContext.getEnvironment().getProperty(PERM_INSTANCE);
  87             permissionList.add(SecureServicePermission.create(applicationContext.getEnvironment().getProperty(PERM_CL),
  88                     cldsPermissionInstance, READ));
  89             permissionList.add(SecureServicePermission.create(applicationContext.getEnvironment().getProperty(PERM_CL),
  90                     cldsPermissionInstance, UPDATE));
  91             permissionList.add(SecureServicePermission.create(
  92                     applicationContext.getEnvironment().getProperty(PERM_TEMPLATE), cldsPermissionInstance, READ));
  93             permissionList.add(SecureServicePermission.create(
  94                     applicationContext.getEnvironment().getProperty(PERM_TEMPLATE), cldsPermissionInstance, UPDATE));
  95             permissionList.add(SecureServicePermission.create(applicationContext.getEnvironment().getProperty(PERM_VF),
  96                     cldsPermissionInstance, "*"));
  97             permissionList.add(SecureServicePermission
  98                     .create(applicationContext.getEnvironment().getProperty(PERM_MANAGE), cldsPermissionInstance, "*"));
  99             permissionList.add(SecureServicePermission
 100                     .create(applicationContext.getEnvironment().getProperty(PERM_TOSCA), cldsPermissionInstance, READ));
 101             permissionList.add(SecureServicePermission
 102                     .create(applicationContext.getEnvironment().getProperty(PERM_TOSCA),
 103                             cldsPermissionInstance, UPDATE));
 104         }
 105         return permissionList;
 106     }
 107
 108     /**
 109      * When AAF is enabled, request object will contain a cadi Wrapper, so queries
 110      * to isUserInRole will invoke a http call to AAF server.
 111      */
 112     @Override
 113     protected void doService(HttpServletRequest request, HttpServletResponse response) {
 114         Principal principal = request.getUserPrincipal();
 115         if (principal != null && Arrays.stream(loadDynamicAuthenticationClasses())
 116                 .anyMatch(className -> className.equals(principal.getName()))) {
 117             // When AAF is enabled, there is a need to provision the permissions to Spring
 118             // system
 119             List<GrantedAuthority> grantedAuths = new ArrayList<>();
 120             for (SecureServicePermission perm : getPermissionList()) {
 121                 String permString = perm.toString();
 122                 if (request.isUserInRole(permString)) {
 123                     grantedAuths.add(new SimpleGrantedAuthority(permString));
 124                 }
 125             }
 126             Authentication auth = new UsernamePasswordAuthenticationToken(new User(principal.getName(), "",
 127                     grantedAuths), "", grantedAuths);
 128             SecurityContextHolder.getContext().setAuthentication(auth);
 129         }
 130         try {
 131             super.doService(request, response);
 132         } catch (ServletException | IOException ioe) {
 133             logger.error("Exception caught when executing doService in servlet", ioe);
 134             try {
 135                 response.sendError(HttpStatus.INTERNAL_SERVER_ERROR.value());
 136             } catch (IOException e) {
 137                 logger.error("Exception caught when executing HTTP sendError in servlet", e);
 138             }
 139         }
 140     }
 141 }