ldap.class.php

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<?php
/* Copyright (C) 2004   Rodolphe Quiedeville <rodolphe@quiedeville.org>
 * Copyright (C) 2004   Benoit Mortier       <benoit.mortier@opensides.be>
 * Copyright (C) 2005-2021  Regis Houssin        <regis.houssin@inodbox.com>
 * Copyright (C) 2006-2021  Laurent Destailleur  <eldy@users.sourceforge.net>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <https://www.gnu.org/licenses/>.
 * or see https://www.gnu.org/
 */
 
class Ldap
{
  public $error = '';
 
  public $errors = array();
 
  public $server = array();
 
  public $connectedServer;
 
  public $dn;
  public $serverType;
  public $ldapProtocolVersion;
  public $domain;
  public $searchUser;
  public $searchPassword;
  public $people;
  public $groups;
  public $ldapErrorCode;
  public $ldapErrorText;
 
 
  //Fetch user
  public $name;
  public $firstname;
  public $login;
  public $phone;
  public $skype;
  public $fax;
  public $mail;
  public $mobile;
 
  public $uacf;
  public $pwdlastset;
 
  public $ldapcharset = 'UTF-8'; // LDAP should be UTF-8 encoded
 
 
  public $connection;
  public $result;
 
  const SYNCHRO_NONE = 0;
 
  const SYNCHRO_DOLIBARR_TO_LDAP = 1;
 
  const SYNCHRO_LDAP_TO_DOLIBARR = 2;
 
 
  public function __construct()
  {
    global $conf;
 
    // Server
    if (!empty($conf->global->LDAP_SERVER_HOST)) {
      $this->server[] = $conf->global->LDAP_SERVER_HOST;
    }
    if (!empty($conf->global->LDAP_SERVER_HOST_SLAVE)) {
      $this->server[] = $conf->global->LDAP_SERVER_HOST_SLAVE;
    }
    $this->serverPort          = getDolGlobalInt('LDAP_SERVER_PORT', 389);
    $this->ldapProtocolVersion = getDolGlobalString('LDAP_SERVER_PROTOCOLVERSION');
    $this->dn                  = getDolGlobalString('LDAP_SERVER_DN');
    $this->serverType          = getDolGlobalString('LDAP_SERVER_TYPE');
 
    $this->domain              = getDolGlobalString('LDAP_SERVER_DN');
    $this->searchUser          = getDolGlobalString('LDAP_ADMIN_DN');
    $this->searchPassword      = getDolGlobalString('LDAP_ADMIN_PASS');
    $this->people              = getDolGlobalString('LDAP_USER_DN');
    $this->groups              = getDolGlobalString('LDAP_GROUP_DN');
 
    $this->filter              = getDolGlobalString('LDAP_FILTER_CONNECTION'); // Filter on user
    $this->filtergroup         = getDolGlobalString('LDAP_GROUP_FILTER'); // Filter on groups
    $this->filtermember        = getDolGlobalString('LDAP_MEMBER_FILTER'); // Filter on member
 
    // Users
    $this->attr_login      = getDolGlobalString('LDAP_FIELD_LOGIN'); //unix
    $this->attr_sambalogin = getDolGlobalString('LDAP_FIELD_LOGIN_SAMBA'); //samba, activedirectory
    $this->attr_name       = getDolGlobalString('LDAP_FIELD_NAME');
    $this->attr_firstname  = getDolGlobalString('LDAP_FIELD_FIRSTNAME');
    $this->attr_mail       = getDolGlobalString('LDAP_FIELD_MAIL');
    $this->attr_phone      = getDolGlobalString('LDAP_FIELD_PHONE');
    $this->attr_skype      = getDolGlobalString('LDAP_FIELD_SKYPE');
    $this->attr_fax        = getDolGlobalString('LDAP_FIELD_FAX');
    $this->attr_mobile     = getDolGlobalString('LDAP_FIELD_MOBILE');
  }
 
  // Connection handling methods -------------------------------------------
 
  // phpcs:disable PEAR.NamingConventions.ValidFunctionName.ScopeNotCamelCaps
  public function connect_bind()
  {
    // phpcs:enable
    global $conf;
    global $dolibarr_main_auth_ldap_debug;
 
    $connected = 0;
    $this->bind = 0;
    $this->error = 0;
    $this->connectedServer = '';
 
    $ldapdebug = ((empty($dolibarr_main_auth_ldap_debug) || $dolibarr_main_auth_ldap_debug == "false") ? false : true);
 
    if ($ldapdebug) {
      dol_syslog(get_class($this)."::connect_bind");
      print "DEBUG: connect_bind<br>\n";
    }
 
    // Check parameters
    if (count($this->server) == 0 || empty($this->server[0])) {
      $this->error = 'LDAP setup (file conf.php) is not complete';
      dol_syslog(get_class($this)."::connect_bind ".$this->error, LOG_WARNING);
      return -1;
    }
 
    if (!function_exists("ldap_connect")) {
      $this->error = 'LDAPFunctionsNotAvailableOnPHP';
      dol_syslog(get_class($this)."::connect_bind ".$this->error, LOG_WARNING);
      $return = -1;
    }
 
    if (empty($this->error)) {
      // Loop on each ldap server
      foreach ($this->server as $host) {
        if ($connected) {
          break;
        }
        if (empty($host)) {
          continue;
        }
 
        if ($this->serverPing($host, $this->serverPort) === true) {
          if ($ldapdebug) {
            dol_syslog(get_class($this)."::connect_bind serverPing true, we try ldap_connect to ".$host);
          }
          $this->connection = ldap_connect($host, $this->serverPort);
        } else {
          if (preg_match('/^ldaps/i', $host)) {
            // With host = ldaps://server, the serverPing to ssl://server sometimes fails, even if the ldap_connect succeed, so
            // we test this case and continue in such a case even if serverPing fails.
            if ($ldapdebug) {
              dol_syslog(get_class($this)."::connect_bind serverPing false, we try ldap_connect to ".$host);
            }
            $this->connection = ldap_connect($host, $this->serverPort);
          } else {
            continue;
          }
        }
 
        if (is_resource($this->connection) || is_object($this->connection)) {
          if ($ldapdebug) {
            dol_syslog(get_class($this)."::connect_bind this->connection is ok", LOG_DEBUG);
          }
 
          // Upgrade connexion to TLS, if requested by the configuration
          if (!empty($conf->global->LDAP_SERVER_USE_TLS)) {
            // For test/debug
            //ldap_set_option($this->connection, LDAP_OPT_DEBUG_LEVEL, 7);
            //ldap_set_option($this->connection, LDAP_OPT_PROTOCOL_VERSION, 3);
            //ldap_set_option($this->connection, LDAP_OPT_REFERRALS, 0);
 
            $resulttls = ldap_start_tls($this->connection);
            if (!$resulttls) {
              dol_syslog(get_class($this)."::connect_bind failed to start tls", LOG_WARNING);
              $this->error = 'ldap_start_tls Failed to start TLS '.ldap_errno($this->connection).' '.ldap_error($this->connection);
              $connected = 0;
              $this->unbind();
            }
          }
 
          // Execute the ldap_set_option here (after connect and before bind)
          $this->setVersion();
          ldap_set_option($this->connection, LDAP_OPT_SIZELIMIT, 0); // no limit here. should return true.
 
 
          if ($this->serverType == "activedirectory") {
            $result = $this->setReferrals();
            dol_syslog(get_class($this)."::connect_bind try bindauth for activedirectory on ".$host." user=".$this->searchUser." password=".preg_replace('/./', '*', $this->searchPassword), LOG_DEBUG);
            $this->result = $this->bindauth($this->searchUser, $this->searchPassword);
            if ($this->result) {
              $this->bind = $this->result;
              $connected = 2;
              $this->connectedServer = $host;
              break;
            } else {
              $this->error = ldap_errno($this->connection).' '.ldap_error($this->connection);
            }
          } else {
            // Try in auth mode
            if ($this->searchUser && $this->searchPassword) {
              dol_syslog(get_class($this)."::connect_bind try bindauth on ".$host." user=".$this->searchUser." password=".preg_replace('/./', '*', $this->searchPassword), LOG_DEBUG);
              $this->result = $this->bindauth($this->searchUser, $this->searchPassword);
              if ($this->result) {
                $this->bind = $this->result;
                $connected = 2;
                $this->connectedServer = $host;
                break;
              } else {
                $this->error = ldap_errno($this->connection).' '.ldap_error($this->connection);
              }
            }
            // Try in anonymous
            if (!$this->bind) {
              dol_syslog(get_class($this)."::connect_bind try bind anonymously on ".$host, LOG_DEBUG);
              $result = $this->bind();
              if ($result) {
                $this->bind = $this->result;
                $connected = 1;
                $this->connectedServer = $host;
                break;
              } else {
                $this->error = ldap_errno($this->connection).' '.ldap_error($this->connection);
              }
            }
          }
        }
 
        if (!$connected) {
          $this->unbind();
        }
      } // End loop on each server
    }
 
    if ($connected) {
      $return = $connected;
      dol_syslog(get_class($this)."::connect_bind return=".$return, LOG_DEBUG);
    } else {
      $this->error = 'Failed to connect to LDAP'.($this->error ? ': '.$this->error : '');
      $return = -1;
      dol_syslog(get_class($this)."::connect_bind return=".$return.' - '.$this->error, LOG_WARNING);
    }
 
    return $return;
  }
 
  public function close()
  {
    return $this->unbind();
  }
 
  public function bind()
  {
    if (!$this->result = @ldap_bind($this->connection)) {
      $this->ldapErrorCode = ldap_errno($this->connection);
      $this->ldapErrorText = ldap_error($this->connection);
      $this->error = $this->ldapErrorCode." ".$this->ldapErrorText;
      return false;
    } else {
      return true;
    }
  }
 
  public function bindauth($bindDn, $pass)
  {
    if (!$this->result = @ldap_bind($this->connection, $bindDn, $pass)) {
      $this->ldapErrorCode = ldap_errno($this->connection);
      $this->ldapErrorText = ldap_error($this->connection);
      $this->error = $this->ldapErrorCode." ".$this->ldapErrorText;
      return false;
    } else {
      return true;
    }
  }
 
  public function unbind()
  {
    $this->result = true;
    if (is_resource($this->connection) || is_object($this->connection)) {
      $this->result = @ldap_unbind($this->connection);
    }
    if ($this->result) {
      return true;
    } else {
      return false;
    }
  }
 
 
  public function getVersion()
  {
    $version = 0;
    $version = @ldap_get_option($this->connection, LDAP_OPT_PROTOCOL_VERSION, $version);
    return $version;
  }
 
  public function setVersion()
  {
    // LDAP_OPT_PROTOCOL_VERSION est une constante qui vaut 17
    $ldapsetversion = ldap_set_option($this->connection, LDAP_OPT_PROTOCOL_VERSION, $this->ldapProtocolVersion);
    return $ldapsetversion;
  }
 
  public function setReferrals()
  {
    // LDAP_OPT_REFERRALS est une constante qui vaut ?
    $ldapreferrals = ldap_set_option($this->connection, LDAP_OPT_REFERRALS, 0);
    return $ldapreferrals;
  }
 
 
  public function add($dn, $info, $user)
  {
    dol_syslog(get_class($this)."::add dn=".$dn." info=".json_encode($info));
 
    // Check parameters
    if (!$this->connection) {
      $this->error = "NotConnected";
      return -2;
    }
    if (!$this->bind) {
      $this->error = "NotConnected";
      return -3;
    }
 
    // Encode to LDAP page code
    $dn = $this->convFromOutputCharset($dn, $this->ldapcharset);
    foreach ($info as $key => $val) {
      if (!is_array($val)) {
        $info[$key] = $this->convFromOutputCharset($val, $this->ldapcharset);
      }
    }
 
    $this->dump($dn, $info);
 
    //print_r($info);
    $result = @ldap_add($this->connection, $dn, $info);
 
    if ($result) {
      dol_syslog(get_class($this)."::add successfull", LOG_DEBUG);
      return 1;
    } else {
      $this->ldapErrorCode = @ldap_errno($this->connection);
      $this->ldapErrorText = @ldap_error($this->connection);
      $this->error = $this->ldapErrorCode." ".$this->ldapErrorText;
      dol_syslog(get_class($this)."::add failed: ".$this->error, LOG_ERR);
      return -1;
    }
  }
 
  public function modify($dn, $info, $user)
  {
    dol_syslog(get_class($this)."::modify dn=".$dn." info=".join(',', $info));
 
    // Check parameters
    if (!$this->connection) {
      $this->error = "NotConnected";
      return -2;
    }
    if (!$this->bind) {
      $this->error = "NotConnected";
      return -3;
    }
 
    // Encode to LDAP page code
    $dn = $this->convFromOutputCharset($dn, $this->ldapcharset);
    foreach ($info as $key => $val) {
      if (!is_array($val)) {
        $info[$key] = $this->convFromOutputCharset($val, $this->ldapcharset);
      }
    }
 
    $this->dump($dn, $info);
 
    //print_r($info);
 
    // For better compatibility with Samba4 AD
    if ($this->serverType == "activedirectory") {
      unset($info['cn']); // To avoid error : Operation not allowed on RDN (Code 67)
 
      // To avoid error : LDAP Error: 53 (Unwilling to perform)
      if (isset($info['unicodePwd'])) {
        $info['unicodePwd'] = mb_convert_encoding("\"".$info['unicodePwd']."\"", "UTF-16LE", "UTF-8");
      }
    }
    $result = @ldap_modify($this->connection, $dn, $info);
 
    if ($result) {
      dol_syslog(get_class($this)."::modify successfull", LOG_DEBUG);
      return 1;
    } else {
      $this->error = @ldap_error($this->connection);
      dol_syslog(get_class($this)."::modify failed: ".$this->error, LOG_ERR);
      return -1;
    }
  }
 
  public function rename($dn, $newrdn, $newparent, $user, $deleteoldrdn = true)
  {
    dol_syslog(get_class($this)."::modify dn=".$dn." newrdn=".$newrdn." newparent=".$newparent." deleteoldrdn=".($deleteoldrdn ? 1 : 0));
 
    // Check parameters
    if (!$this->connection) {
      $this->error = "NotConnected";
      return -2;
    }
    if (!$this->bind) {
      $this->error = "NotConnected";
      return -3;
    }
 
    // Encode to LDAP page code
    $dn = $this->convFromOutputCharset($dn, $this->ldapcharset);
    $newrdn = $this->convFromOutputCharset($newrdn, $this->ldapcharset);
    $newparent = $this->convFromOutputCharset($newparent, $this->ldapcharset);
 
    //print_r($info);
    $result = @ldap_rename($this->connection, $dn, $newrdn, $newparent, $deleteoldrdn);
 
    if ($result) {
      dol_syslog(get_class($this)."::rename successfull", LOG_DEBUG);
      return 1;
    } else {
      $this->error = @ldap_error($this->connection);
      dol_syslog(get_class($this)."::rename failed: ".$this->error, LOG_ERR);
      return -1;
    }
  }
 
  public function update($dn, $info, $user, $olddn, $newrdn = false, $newparent = false)
  {
    dol_syslog(get_class($this)."::update dn=".$dn." olddn=".$olddn);
 
    // Check parameters
    if (!$this->connection) {
      $this->error = "NotConnected";
      return -2;
    }
    if (!$this->bind) {
      $this->error = "NotConnected";
      return -3;
    }
 
    if (!$olddn || $olddn != $dn) {
      if (!empty($olddn) && !empty($newrdn) && !empty($newparent) && $this->ldapProtocolVersion === '3') {
        // This function currently only works with LDAPv3
        $result = $this->rename($olddn, $newrdn, $newparent, $user, true);
        $result = $this->modify($dn, $info, $user); // We force "modify" for avoid some fields not modify
      } else {
        // If change we make is rename the key of LDAP record, we create new one and if ok, we delete old one.
        $result = $this->add($dn, $info, $user);
        if ($result > 0 && $olddn && $olddn != $dn) {
          $result = $this->delete($olddn); // If add fails, we do not try to delete old one
        }
      }
    } else {
      //$result = $this->delete($olddn);
      $result = $this->add($dn, $info, $user); // If record has been deleted from LDAP, we recreate it. We ignore error if it already exists.
      $result = $this->modify($dn, $info, $user); // We use add/modify instead of delete/add when olddn is received
    }
    if ($result <= 0) {
      $this->error = ldap_error($this->connection).' (Code '.ldap_errno($this->connection).") ".$this->error;
      dol_syslog(get_class($this)."::update ".$this->error, LOG_ERR);
      //print_r($info);
      return -1;
    } else {
      dol_syslog(get_class($this)."::update done successfully");
      return 1;
    }
  }
 
 
  public function delete($dn)
  {
    dol_syslog(get_class($this)."::delete Delete LDAP entry dn=".$dn);
 
    // Check parameters
    if (!$this->connection) {
      $this->error = "NotConnected";
      return -2;
    }
    if (!$this->bind) {
      $this->error = "NotConnected";
      return -3;
    }
 
    // Encode to LDAP page code
    $dn = $this->convFromOutputCharset($dn, $this->ldapcharset);
 
    $result = @ldap_delete($this->connection, $dn);
 
    if ($result) {
      return 1;
    }
    return -1;
  }
 
  // phpcs:disable PEAR.NamingConventions.ValidFunctionName.ScopeNotCamelCaps
  public function dump_content($dn, $info)
  {
    // phpcs:enable
    $content = '';
 
    // Create file content
    if (preg_match('/^ldap/', $this->server[0])) {
      $target = "-H ".join(',', $this->server);
    } else {
      $target = "-h ".join(',', $this->server)." -p ".$this->serverPort;
    }
    $content .= "# ldapadd $target -c -v -D ".$this->searchUser." -W -f ldapinput.in\n";
    $content .= "# ldapmodify $target -c -v -D ".$this->searchUser." -W -f ldapinput.in\n";
    $content .= "# ldapdelete $target -c -v -D ".$this->searchUser." -W -f ldapinput.in\n";
    if (in_array('localhost', $this->server)) {
      $content .= "# If commands fails to connect, try without -h and -p\n";
    }
    $content .= "dn: ".$dn."\n";
    foreach ($info as $key => $value) {
      if (!is_array($value)) {
        $content .= "$key: $value\n";
      } else {
        foreach ($value as $valuevalue) {
          $content .= "$key: $valuevalue\n";
        }
      }
    }
    return $content;
  }
 
  public function dump($dn, $info)
  {
    global $conf;
 
    // Create content
    $content = $this->dump_content($dn, $info);
 
    //Create file
    $result = dol_mkdir($conf->ldap->dir_temp);
 
    $outputfile = $conf->ldap->dir_temp.'/ldapinput.in';
    $fp = fopen($outputfile, "w");
    if ($fp) {
      fputs($fp, $content);
      fclose($fp);
      if (!empty($conf->global->MAIN_UMASK)) {
        @chmod($outputfile, octdec($conf->global->MAIN_UMASK));
      }
      return 1;
    } else {
      return -1;
    }
  }
 
  public function serverPing($host, $port = 389, $timeout = 1)
  {
    $regs = array();
    if (preg_match('/^ldaps:\/\/([^\/]+)\/?$/', $host, $regs)) {
      // Replace ldaps:// by ssl://
      $host = 'ssl://'.$regs[1];
    } elseif (preg_match('/^ldap:\/\/([^\/]+)\/?$/', $host, $regs)) {
      // Remove ldap://
      $host = $regs[1];
    }
 
    //var_dump($newhostforstream); var_dump($host); var_dump($port);
    //$host = 'ssl://ldap.test.local:636';
    //$port = 636;
 
    $errno = $errstr = 0;
    /*
    if ($methodtochecktcpconnect == 'socket') {
      Try to use socket_create() method.
      Method that use stream_context_create() works only on registered listed in stream stream_get_wrappers(): http, https, ftp, ...
    }
    */
 
    // Use the method fsockopen to test tcp connect. No way to ignore ssl certificate errors with this method !
    $op = @fsockopen($host, $port, $errno, $errstr, $timeout);
 
    //var_dump($op);
    if (!$op) {
      return false; //DC is N/A
    } else {
      fclose($op); //explicitly close open socket connection
      return true; //DC is up & running, we can safely connect with ldap_connect
    }
  }
 
 
  // Attribute methods -----------------------------------------------------
 
  public function addAttribute($dn, $info, $user)
  {
    dol_syslog(get_class($this)."::addAttribute dn=".$dn." info=".join(',', $info));
 
    // Check parameters
    if (!$this->connection) {
      $this->error = "NotConnected";
      return -2;
    }
    if (!$this->bind) {
      $this->error = "NotConnected";
      return -3;
    }
 
    // Encode to LDAP page code
    $dn = $this->convFromOutputCharset($dn, $this->ldapcharset);
    foreach ($info as $key => $val) {
      if (!is_array($val)) {
        $info[$key] = $this->convFromOutputCharset($val, $this->ldapcharset);
      }
    }
 
    $this->dump($dn, $info);
 
    //print_r($info);
    $result = @ldap_mod_add($this->connection, $dn, $info);
 
    if ($result) {
      dol_syslog(get_class($this)."::add_attribute successfull", LOG_DEBUG);
      return 1;
    } else {
      $this->error = @ldap_error($this->connection);
      dol_syslog(get_class($this)."::add_attribute failed: ".$this->error, LOG_ERR);
      return -1;
    }
  }
 
  public function updateAttribute($dn, $info, $user)
  {
    dol_syslog(get_class($this)."::updateAttribute dn=".$dn." info=".join(',', $info));
 
    // Check parameters
    if (!$this->connection) {
      $this->error = "NotConnected";
      return -2;
    }
    if (!$this->bind) {
      $this->error = "NotConnected";
      return -3;
    }
 
    // Encode to LDAP page code
    $dn = $this->convFromOutputCharset($dn, $this->ldapcharset);
    foreach ($info as $key => $val) {
      if (!is_array($val)) {
        $info[$key] = $this->convFromOutputCharset($val, $this->ldapcharset);
      }
    }
 
    $this->dump($dn, $info);
 
    //print_r($info);
    $result = @ldap_mod_replace($this->connection, $dn, $info);
 
    if ($result) {
      dol_syslog(get_class($this)."::updateAttribute successfull", LOG_DEBUG);
      return 1;
    } else {
      $this->error = @ldap_error($this->connection);
      dol_syslog(get_class($this)."::updateAttribute failed: ".$this->error, LOG_ERR);
      return -1;
    }
  }
 
  public function deleteAttribute($dn, $info, $user)
  {
    dol_syslog(get_class($this)."::deleteAttribute dn=".$dn." info=".join(',', $info));
 
    // Check parameters
    if (!$this->connection) {
      $this->error = "NotConnected";
      return -2;
    }
    if (!$this->bind) {
      $this->error = "NotConnected";
      return -3;
    }
 
    // Encode to LDAP page code
    $dn = $this->convFromOutputCharset($dn, $this->ldapcharset);
    foreach ($info as $key => $val) {
      if (!is_array($val)) {
        $info[$key] = $this->convFromOutputCharset($val, $this->ldapcharset);
      }
    }
 
    $this->dump($dn, $info);
 
    //print_r($info);
    $result = @ldap_mod_del($this->connection, $dn, $info);
 
    if ($result) {
      dol_syslog(get_class($this)."::deleteAttribute successfull", LOG_DEBUG);
      return 1;
    } else {
      $this->error = @ldap_error($this->connection);
      dol_syslog(get_class($this)."::deleteAttribute failed: ".$this->error, LOG_ERR);
      return -1;
    }
  }
 
  public function getAttribute($dn, $filter)
  {
    // Check parameters
    if (!$this->connection) {
      $this->error = "NotConnected";
      return -2;
    }
    if (!$this->bind) {
      $this->error = "NotConnected";
      return -3;
    }
 
    $search = @ldap_search($this->connection, $dn, $filter);
 
    // Only one entry should ever be returned
    $entry = @ldap_first_entry($this->connection, $search);
 
    if (!$entry) {
      $this->ldapErrorCode = -1;
      $this->ldapErrorText = "Couldn't find entry";
      return 0; // Couldn't find entry...
    }
 
    // Get values
    if (!($values = ldap_get_attributes($this->connection, $entry))) {
      $this->ldapErrorCode = ldap_errno($this->connection);
      $this->ldapErrorText = ldap_error($this->connection);
      return 0; // No matching attributes
    }
 
    // Return an array containing the attributes.
    return $values;
  }
 
  public function getAttributeValues($filterrecord, $attribute)
  {
    $attributes = array();
    $attributes[0] = $attribute;
 
    // We need to search for this user in order to get their entry.
    $this->result = @ldap_search($this->connection, $this->people, $filterrecord, $attributes);
 
    // Pourquoi cette ligne ?
    //$info = ldap_get_entries($this->connection, $this->result);
 
    // Only one entry should ever be returned (no user will have the same uid)
    $entry = ldap_first_entry($this->connection, $this->result);
 
    if (!$entry) {
      $this->ldapErrorCode = -1;
      $this->ldapErrorText = "Couldn't find user";
      return false; // Couldn't find the user...
    }
 
    // Get values
    if (!$values = @ldap_get_values($this->connection, $entry, $attribute)) {
      $this->ldapErrorCode = ldap_errno($this->connection);
      $this->ldapErrorText = ldap_error($this->connection);
      return false; // No matching attributes
    }
 
    // Return an array containing the attributes.
    return $values;
  }
 
  public function getRecords($search, $userDn, $useridentifier, $attributeArray, $activefilter = 0, $attributeAsArray = array())
  {
    $fulllist = array();
 
    dol_syslog(get_class($this)."::getRecords search=".$search." userDn=".$userDn." useridentifier=".$useridentifier." attributeArray=array(".join(',', $attributeArray).") activefilter=".$activefilter);
 
    // if the directory is AD, then bind first with the search user first
    if ($this->serverType == "activedirectory") {
      $this->bindauth($this->searchUser, $this->searchPassword);
      dol_syslog(get_class($this)."::bindauth serverType=activedirectory searchUser=".$this->searchUser);
    }
 
    // Define filter
    if (!empty($activefilter)) {  // Use a predefined trusted filter (defined into setup by admin).
      if (((string) $activefilter == '1' || (string) $activefilter == 'user') && $this->filter) {
        $filter = '('.$this->filter.')';
      } elseif (((string) $activefilter == 'group') && $this->filtergroup ) {
        $filter = '('.$this->filtergroup.')';
      } elseif (((string) $activefilter == 'member') && $this->filter) {
        $filter = '('.$this->filtermember.')';
      } else {
        // If this->filter/this->filtergroup is empty, make fiter on * (all)
        $filter = '('.ldap_escape($useridentifier, '', LDAP_ESCAPE_FILTER).'=*)';
      }
    } else {            // Use a filter forged using the $search value
      $filter = '('.ldap_escape($useridentifier, '', LDAP_ESCAPE_FILTER).'='.ldap_escape($search, '', LDAP_ESCAPE_FILTER).')';
    }
 
    if (is_array($attributeArray)) {
      // Return list with required fields
      $attributeArray = array_values($attributeArray); // This is to force to have index reordered from 0 (not make ldap_search fails)
      dol_syslog(get_class($this)."::getRecords connection=".$this->connectedServer.":".$this->serverPort." userDn=".$userDn." filter=".$filter." attributeArray=(".join(',', $attributeArray).")");
      //var_dump($attributeArray);
      $this->result = @ldap_search($this->connection, $userDn, $filter, $attributeArray);
    } else {
      // Return list with fields selected by default
      dol_syslog(get_class($this)."::getRecords connection=".$this->connectedServer.":".$this->serverPort." userDn=".$userDn." filter=".$filter);
      $this->result = @ldap_search($this->connection, $userDn, $filter);
    }
    if (!$this->result) {
      $this->error = 'LDAP search failed: '.ldap_errno($this->connection)." ".ldap_error($this->connection);
      return -1;
    }
 
    $info = @ldap_get_entries($this->connection, $this->result);
 
    // Warning: Dans info, les noms d'attributs sont en minuscule meme si passe
    // a ldap_search en majuscule !!!
    //print_r($info);
 
    for ($i = 0; $i < $info["count"]; $i++) {
      $recordid = $this->convToOutputCharset($info[$i][strtolower($useridentifier)][0], $this->ldapcharset);
      if ($recordid) {
        //print "Found record with key $useridentifier=".$recordid."<br>\n";
        $fulllist[$recordid][$useridentifier] = $recordid;
 
        // Add to the array for each attribute in my list
        $num = count($attributeArray);
        for ($j = 0; $j < $num; $j++) {
          $keyattributelower = strtolower($attributeArray[$j]);
          //print " Param ".$attributeArray[$j]."=".$info[$i][$keyattributelower][0]."<br>\n";
 
          //permet de recuperer le SID avec Active Directory
          if ($this->serverType == "activedirectory" && $keyattributelower == "objectsid") {
            $objectsid = $this->getObjectSid($recordid);
            $fulllist[$recordid][$attributeArray[$j]] = $objectsid;
          } else {
            if (in_array($attributeArray[$j], $attributeAsArray) && is_array($info[$i][$keyattributelower])) {
              $valueTab = array();
              foreach ($info[$i][$keyattributelower] as $key => $value) {
                $valueTab[$key] = $this->convToOutputCharset($value, $this->ldapcharset);
              }
              $fulllist[$recordid][$attributeArray[$j]] = $valueTab;
            } else {
              $fulllist[$recordid][$attributeArray[$j]] = $this->convToOutputCharset($info[$i][$keyattributelower][0], $this->ldapcharset);
            }
          }
        }
      }
    }
 
    asort($fulllist);
    return $fulllist;
  }
 
  public function littleEndian($hex)
  {
    $result = '';
    for ($x = dol_strlen($hex) - 2; $x >= 0; $x = $x - 2) {
      $result .= substr($hex, $x, 2);
    }
    return $result;
  }
 
 
  public function getObjectSid($ldapUser)
  {
    $criteria = '('.$this->getUserIdentifier().'='.$ldapUser.')';
    $justthese = array("objectsid");
 
    // if the directory is AD, then bind first with the search user first
    if ($this->serverType == "activedirectory") {
      $this->bindauth($this->searchUser, $this->searchPassword);
    }
 
    $i = 0;
    $searchDN = $this->people;
 
    while ($i <= 2) {
      $ldapSearchResult = @ldap_search($this->connection, $searchDN, $criteria, $justthese);
 
      if (!$ldapSearchResult) {
        $this->error = ldap_errno($this->connection)." ".ldap_error($this->connection);
        return -1;
      }
 
      $entry = ldap_first_entry($this->connection, $ldapSearchResult);
 
      if (!$entry) {
        // Si pas de resultat on cherche dans le domaine
        $searchDN = $this->domain;
        $i++;
      } else {
        $i++;
        $i++;
      }
    }
 
    if ($entry) {
      $ldapBinary = ldap_get_values_len($this->connection, $entry, "objectsid");
      $SIDText = $this->binSIDtoText($ldapBinary[0]);
      return $SIDText;
    } else {
      $this->error = ldap_errno($this->connection)." ".ldap_error($this->connection);
      return '?';
    }
  }
 
  public function binSIDtoText($binsid)
  {
    $hex_sid = bin2hex($binsid);
    $rev = hexdec(substr($hex_sid, 0, 2)); // Get revision-part of SID
    $subcount = hexdec(substr($hex_sid, 2, 2)); // Get count of sub-auth entries
    $auth = hexdec(substr($hex_sid, 4, 12)); // SECURITY_NT_AUTHORITY
    $result = "$rev-$auth";
    for ($x = 0; $x < $subcount; $x++) {
      $result .= "-".hexdec($this->littleEndian(substr($hex_sid, 16 + ($x * 8), 8))); // get all SECURITY_NT_AUTHORITY
    }
    return $result;
  }
 
 
  public function search($checkDn, $filter)
  {
    dol_syslog(get_class($this)."::search checkDn=".$checkDn." filter=".$filter);
 
    $checkDn = $this->convFromOutputCharset($checkDn, $this->ldapcharset);
    $filter = $this->convFromOutputCharset($filter, $this->ldapcharset);
 
    // if the directory is AD, then bind first with the search user first
    if ($this->serverType == "activedirectory") {
      $this->bindauth($this->searchUser, $this->searchPassword);
    }
 
    $this->result = @ldap_search($this->connection, $checkDn, $filter);
 
    $result = @ldap_get_entries($this->connection, $this->result);
    if (!$result) {
      $this->error = ldap_errno($this->connection)." ".ldap_error($this->connection);
      return -1;
    } else {
      ldap_free_result($this->result);
      return $result;
    }
  }
 
 
  public function fetch($user, $filter)
  {
    // Perform the search and get the entry handles
 
    // if the directory is AD, then bind first with the search user first
    if ($this->serverType == "activedirectory") {
      $this->bindauth($this->searchUser, $this->searchPassword);
    }
 
    $searchDN = $this->people; // TODO Why searching in people then domain ?
 
    $result = '';
    $i = 0;
    while ($i <= 2) {
      dol_syslog(get_class($this)."::fetch search with searchDN=".$searchDN." filter=".$filter);
      $this->result = @ldap_search($this->connection, $searchDN, $filter);
      if ($this->result) {
        $result = @ldap_get_entries($this->connection, $this->result);
        if ($result['count'] > 0) {
          dol_syslog('Ldap::fetch search found '.$result['count'].' records');
        } else {
          dol_syslog('Ldap::fetch search returns but found no records');
        }
        //var_dump($result);exit;
      } else {
        $this->error = ldap_errno($this->connection)." ".ldap_error($this->connection);
        dol_syslog(get_class($this)."::fetch search fails");
        return -1;
      }
 
      if (!$result) {
        // Si pas de resultat on cherche dans le domaine
        $searchDN = $this->domain;
        $i++;
      } else {
        break;
      }
    }
 
    if (!$result) {
      $this->error = ldap_errno($this->connection)." ".ldap_error($this->connection);
      return -1;
    } else {
      $this->name       = $this->convToOutputCharset($result[0][$this->attr_name][0], $this->ldapcharset);
      $this->firstname  = $this->convToOutputCharset($result[0][$this->attr_firstname][0], $this->ldapcharset);
      $this->login      = $this->convToOutputCharset($result[0][$this->attr_login][0], $this->ldapcharset);
      $this->phone      = $this->convToOutputCharset($result[0][$this->attr_phone][0], $this->ldapcharset);
      $this->skype      = $this->convToOutputCharset($result[0][$this->attr_skype][0], $this->ldapcharset);
      $this->fax        = $this->convToOutputCharset($result[0][$this->attr_fax][0], $this->ldapcharset);
      $this->mail       = $this->convToOutputCharset($result[0][$this->attr_mail][0], $this->ldapcharset);
      $this->mobile     = $this->convToOutputCharset($result[0][$this->attr_mobile][0], $this->ldapcharset);
 
      $this->uacf       = $this->parseUACF($this->convToOutputCharset($result[0]["useraccountcontrol"][0], $this->ldapcharset));
      if (isset($result[0]["pwdlastset"][0])) { // If expiration on password exists
        $this->pwdlastset = ($result[0]["pwdlastset"][0] != 0) ? $this->convert_time($this->convToOutputCharset($result[0]["pwdlastset"][0], $this->ldapcharset)) : 0;
      } else {
        $this->pwdlastset = -1;
      }
      if (!$this->name && !$this->login) {
        $this->pwdlastset = -1;
      }
      $this->badpwdtime = $this->convert_time($this->convToOutputCharset($result[0]["badpasswordtime"][0], $this->ldapcharset));
 
      // FQDN domain
      $domain = str_replace('dc=', '', $this->domain);
      $domain = str_replace(',', '.', $domain);
      $this->domainFQDN = $domain;
 
      // Set ldapUserDn (each user can have a different dn)
      //var_dump($result[0]);exit;
      $this->ldapUserDN = $result[0]['dn'];
 
      ldap_free_result($this->result);
      return 1;
    }
  }
 
 
  // helper methods
 
  public function getUserIdentifier()
  {
    if ($this->serverType == "activedirectory") {
      return $this->attr_sambalogin;
    } else {
      return $this->attr_login;
    }
  }
 
  public function parseUACF($uacf)
  {
    //All flags array
    $flags = array(
      "TRUSTED_TO_AUTH_FOR_DELEGATION"  =>    16777216,
      "PASSWORD_EXPIRED"                =>    8388608,
      "DONT_REQ_PREAUTH"                =>    4194304,
      "USE_DES_KEY_ONLY"                =>    2097152,
      "NOT_DELEGATED"                   =>    1048576,
      "TRUSTED_FOR_DELEGATION"          =>    524288,
      "SMARTCARD_REQUIRED"              =>    262144,
      "MNS_LOGON_ACCOUNT"               =>    131072,
      "DONT_EXPIRE_PASSWORD"            =>    65536,
      "SERVER_TRUST_ACCOUNT"            =>    8192,
      "WORKSTATION_TRUST_ACCOUNT"       =>    4096,
      "INTERDOMAIN_TRUST_ACCOUNT"       =>    2048,
      "NORMAL_ACCOUNT"                  =>    512,
      "TEMP_DUPLICATE_ACCOUNT"          =>    256,
      "ENCRYPTED_TEXT_PWD_ALLOWED"      =>    128,
      "PASSWD_CANT_CHANGE"              =>    64,
      "PASSWD_NOTREQD"                  =>    32,
      "LOCKOUT"                         =>    16,
      "HOMEDIR_REQUIRED"                =>    8,
      "ACCOUNTDISABLE"                  =>    2,
      "SCRIPT"                          =>    1
    );
 
    //Parse flags to text
    $retval = array();
    //while (list($flag, $val) = each($flags)) {
    foreach ($flags as $flag => $val) {
      if ($uacf >= $val) {
        $uacf -= $val;
        $retval[$val] = $flag;
      }
    }
 
    //Return human friendly flags
    return($retval);
  }
 
  public function parseSAT($samtype)
  {
    $stypes = array(
      805306368    =>    "NORMAL_ACCOUNT",
      805306369    =>    "WORKSTATION_TRUST",
      805306370    =>    "INTERDOMAIN_TRUST",
      268435456    =>    "SECURITY_GLOBAL_GROUP",
      268435457    =>    "DISTRIBUTION_GROUP",
      536870912    =>    "SECURITY_LOCAL_GROUP",
      536870913    =>    "DISTRIBUTION_LOCAL_GROUP"
    );
 
    $retval = "";
    while (list($sat, $val) = each($stypes)) {
      if ($samtype == $sat) {
        $retval = $val;
        break;
      }
    }
    if (empty($retval)) {
      $retval = "UNKNOWN_TYPE_".$samtype;
    }
 
    return($retval);
  }
 
  // phpcs:disable PEAR.NamingConventions.ValidFunctionName.ScopeNotCamelCaps
  public function convert_time($value)
  {
    // phpcs:enable
    $dateLargeInt = $value; // nano secondes depuis 1601 !!!!
    $secsAfterADEpoch = $dateLargeInt / (10000000); // secondes depuis le 1 jan 1601
    $ADToUnixConvertor = ((1970 - 1601) * 365.242190) * 86400; // UNIX start date - AD start date * jours * secondes
    $unixTimeStamp = intval($secsAfterADEpoch - $ADToUnixConvertor); // Unix time stamp
    return $unixTimeStamp;
  }
 
 
  private function convToOutputCharset($str, $pagecodefrom = 'UTF-8')
  {
    global $conf;
    if ($pagecodefrom == 'ISO-8859-1' && $conf->file->character_set_client == 'UTF-8') {
      $str = utf8_encode($str);
    }
    if ($pagecodefrom == 'UTF-8' && $conf->file->character_set_client == 'ISO-8859-1') {
      $str = utf8_decode($str);
    }
    return $str;
  }
 
  public function convFromOutputCharset($str, $pagecodeto = 'UTF-8')
  {
    global $conf;
    if ($pagecodeto == 'ISO-8859-1' && $conf->file->character_set_client == 'UTF-8') {
      $str = utf8_decode($str);
    }
    if ($pagecodeto == 'UTF-8' && $conf->file->character_set_client == 'ISO-8859-1') {
      $str = utf8_encode($str);
    }
    return $str;
  }
 
 
  public function getNextGroupGid($keygroup = 'LDAP_KEY_GROUPS')
  {
    global $conf;
 
    if (empty($keygroup)) {
      $keygroup = 'LDAP_KEY_GROUPS';
    }
 
    $search = '('.$conf->global->$keygroup.'=*)';
    $result = $this->search($this->groups, $search);
    if ($result) {
      $c = $result['count'];
      $gids = array();
      for ($i = 0; $i < $c; $i++) {
        $gids[] = $result[$i]['gidnumber'][0];
      }
      rsort($gids);
 
      return $gids[0] + 1;
    }
 
    return 0;
  }
}