text: ////////////////////////////////////////////////////////////////////////
  //
  //     Copyright (c) 2009-2015 Denim Group, Ltd.
  //
  //     The contents of this file are subject to the Mozilla Public 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.mozilla.org/MPL/
  //
  //     Software distributed under the License is distributed on an "AS IS"
  //     basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
  //     License for the specific language governing rights and limitations
  //     under the License.
  //
  //     The Original Code is ThreadFix.
  //
  //     The Initial Developer of the Original Code is Denim Group, Ltd.
  //     Portions created by Denim Group, Ltd. are Copyright (C)
  //     Denim Group, Ltd. All Rights Reserved.
  //
  //     Contributor(s): Denim Group, Ltd.
  //
  ////////////////////////////////////////////////////////////////////////
  
  package com.denimgroup.threadfix.service;
  
  import com.denimgroup.threadfix.logging.SanitizedLogger;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.security.authentication.AuthenticationProvider;
  import org.springframework.security.core.Authentication;
  import org.springframework.stereotype.Service;
  import org.springframework.transaction.annotation.Transactional;
  
  @Service
  public class LdapAuthenticator implements AuthenticationProvider, LdapAuthenticatorService {
  
      protected final SanitizedLogger log = new SanitizedLogger(LdapService.class);
  
      @Autowired(required = false)
      private LdapService ldapService;
  
      public LdapAuthenticator() {
      }
  
      @Override
      @Transactional
      public Authentication authenticate(Authentication authentication) {
          try {
              log.debug("Attempting to authenticate with LDAP authenticator.");
              return ldapService != null ? ldapService.authenticate(authentication) : null;
          } catch (ThreadFixActiveDirectoryAuthenticationException e) {
              log.debug("Failed LDAP authentication.");
              return null;
          } catch (Exception e) { // this is to prevent bad input
              log.error("Encountered exception. Your LDAP configuration is probably invalid.", e);
              return null;
          }
      }
  
      @Override
      public boolean supports(Class<?> authentication) {
          try {
              return ldapService != null && ldapService.supports(authentication);
          } catch (ThreadFixActiveDirectoryAuthenticationException e) {
              log.debug("Failed LDAP authentication.");
              return false;
          } catch (Exception e) { // this is to prevent bad input
              log.error("Encountered exception. Your LDAP configuration is probably invalid.", e);
              return false;
          }
      }
  
  }