content: /*
   * 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.ambari.server.security.authorization;
  
  import java.io.IOException;
  
  import jakarta.servlet.Filter;
  import jakarta.servlet.FilterChain;
  import jakarta.servlet.FilterConfig;
  import jakarta.servlet.ServletException;
  import jakarta.servlet.ServletRequest;
  import jakarta.servlet.ServletResponse;
  import jakarta.servlet.http.HttpServletRequest;
  import jakarta.servlet.http.HttpServletResponse;
  
  import org.apache.ambari.server.orm.entities.UserEntity;
  import org.apache.ambari.server.scheduler.ExecutionScheduleManager;
  import org.apache.ambari.server.security.authentication.AmbariUserAuthentication;
  import org.apache.ambari.server.security.authentication.AmbariUserDetails;
  import org.apache.ambari.server.security.authentication.AmbariUserDetailsImpl;
  import org.apache.ambari.server.security.authorization.internal.InternalTokenClientFilter;
  import org.apache.ambari.server.security.authorization.internal.InternalTokenStorage;
  import org.apache.commons.lang.math.NumberUtils;
  import org.springframework.security.core.context.SecurityContextHolder;
  
  import com.google.inject.Inject;
  
  public class AmbariUserAuthorizationFilter implements Filter {
  
    private final InternalTokenStorage internalTokenStorage;
    private final Users users;
  
    @Inject
    public AmbariUserAuthorizationFilter(InternalTokenStorage internalTokenStorage, Users users) {
      this.internalTokenStorage = internalTokenStorage;
      this.users = users;
    }
  
    @Override
    public void init(FilterConfig filterConfig) throws ServletException {
      // do nothing
    }
  
    @Override
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
      HttpServletRequest httpRequest = (HttpServletRequest) request;
      HttpServletResponse httpResponse = (HttpServletResponse) response;
  
      String token = httpRequest.getHeader(InternalTokenClientFilter.INTERNAL_TOKEN_HEADER);
      if (token != null) {
        if (internalTokenStorage.isValidInternalToken(token)) {
          String userToken = httpRequest.getHeader(ExecutionScheduleManager.USER_ID_HEADER);
          if (userToken != null) {
            if (!NumberUtils.isDigits(userToken)) {
              httpResponse.sendError(HttpServletResponse.SC_FORBIDDEN, "Invalid user ID");
              httpResponse.flushBuffer();
              return;
            }
            Integer userId = Integer.parseInt(userToken);
            UserEntity userEntity = users.getUserEntity(userId);
            if (userEntity == null) {
              httpResponse.sendError(HttpServletResponse.SC_FORBIDDEN, "Authentication required");
              httpResponse.flushBuffer();
              return;
            }
            if (!userEntity.getActive()) {
              httpResponse.sendError(HttpServletResponse.SC_FORBIDDEN, "User is not active");
              httpResponse.flushBuffer();
              return;
            } else {
              AmbariUserDetails userDetails = new AmbariUserDetailsImpl(users.getUser(userEntity), null, users.getUserAuthorities(userEntity));
              AmbariUserAuthentication authentication = new AmbariUserAuthentication(token, userDetails, true);
              SecurityContextHolder.getContext().setAuthentication(authentication);
              httpResponse.setHeader("User", AuthorizationHelper.getAuthenticatedName());
            }
          }
        }
      }
      chain.doFilter(request, response);
    }
  
    @Override
    public void destroy() {
      // do nothing
    }
  }
  