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 compliRance 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.atlas.web.security;
  
  import org.apache.atlas.web.dao.UserDao;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  import org.springframework.security.authentication.BadCredentialsException;
  import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
  import org.springframework.security.core.Authentication;
  import org.springframework.security.core.AuthenticationException;
  import org.springframework.security.core.GrantedAuthority;
  import org.springframework.security.core.userdetails.UserDetails;
  import org.springframework.security.core.userdetails.UserDetailsService;
  import org.springframework.stereotype.Component;
  
  import javax.inject.Inject;
  
  import java.util.Collection;
  
  @Component
  public class AtlasFileAuthenticationProvider extends AtlasAbstractAuthenticationProvider {
      private static final Logger logger = LoggerFactory.getLogger(AtlasFileAuthenticationProvider.class);
  
      private final UserDetailsService userDetailsService;
  
      @Inject
      public AtlasFileAuthenticationProvider(UserDetailsService userDetailsService) {
          this.userDetailsService = userDetailsService;
      }
  
      @Override
      public Authentication authenticate(Authentication authentication) throws AuthenticationException {
          String username = authentication.getName();
          String password = (String) authentication.getCredentials();
  
          if (username == null || username.isEmpty()) {
              logger.error("Username can't be null or empty.");
  
              throw new BadCredentialsException("Username can't be null or empty.");
          }
  
          if (password == null || password.isEmpty()) {
              logger.error("Password can't be null or empty.");
  
              throw new BadCredentialsException("Password can't be null or empty.");
          }
  
          UserDetails user            = userDetailsService.loadUserByUsername(username);
          boolean     isValidPassword = UserDao.checkEncrypted(password, user.getPassword(), username);
  
          if (!isValidPassword) {
              logger.error("Wrong password {}", username);
  
              throw new BadCredentialsException("Wrong password");
          }
  
          Collection<? extends GrantedAuthority> authorities = user.getAuthorities();
  
          authentication = new UsernamePasswordAuthenticationToken(username, password, authorities);
  
          return authentication;
      }
  }
  