antivir.class.php

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<?php
/* Copyright (C) 2000-2005 Rodolphe Quiedeville <rodolphe@quiedeville.org>
 * Copyright (C) 2003      Jean-Louis Bergamo   <jlb@j1b.org>
 * Copyright (C) 2004-2009 Laurent Destailleur  <eldy@users.sourceforge.net>
 * Copyright (C) 2005-2009 Regis Houssin        <regis.houssin@inodbox.com>
 *
 * 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 AntiVir
{
  public $error = '';
 
  public $errors = array();
 
  public $output;
 
  public $db;
 
  public function __construct($db)
  {
    $this->db = $db;
  }
 
  // phpcs:disable PEAR.NamingConventions.ValidFunctionName.ScopeNotCamelCaps
  public function dol_avscan_file($file)
  {
    // phpcs:enable
    global $conf;
 
    $return = 0;
 
    if (preg_match('/\.virus$/i', $file)) {
      $this->errors[] = 'File has an extension saying file is a virus';
      return -97;
    }
 
    $fullcommand = $this->getCliCommand($file);
    //$fullcommand="/usr/bin/clamdscan --fdpass '/tmp/phpuxoAEo'"
    //$fullcommand='"c:\Program Files (x86)\ClamWin\bin\clamscan.exe" --database="C:\Program Files (x86)\ClamWin\lib" "c:\temp\aaa.txt"';
    //var_dump($fullcommand);
 
    $safemode = ini_get("safe_mode");
    // Create a clean fullcommand
    dol_syslog("AntiVir::dol_avscan_file Run command=".$fullcommand." with safe_mode ".($safemode ? "on" : "off"));
    // Run CLI command.
    include_once DOL_DOCUMENT_ROOT.'/core/class/utils.class.php';
    $utils = new Utils($this->db);
    $outputfile = $conf->user->dir_temp.'/antivir.tmp';
 
    $result = $utils->executeCLI($fullcommand, $outputfile);
 
    $return_var = $result['result'];
    $output = $result['output'];
    $errorstring = $result['error'];
 
    if (is_null($output)) {
      $output = array();
    }
 
    dol_syslog("AntiVir::dol_avscan_file Result return_var=".$return_var." output=".$output);
 
    $returncodevirus = 1;
    if ($return_var == $returncodevirus) {  // Virus found
      $this->errors = array($errorstring, $output);
      return -99;
    }
 
    if ($return_var > 0) {          // If other error
      $this->errors = array($errorstring, $output);
      return -98;
    }
 
    // If return code = 0
    return 1;
  }
 
 
 
  public function getCliCommand($file)
  {
    global $conf;
 
    $maxreclevel = 5; // maximal recursion level
    $maxfiles = 1000; // maximal number of files to be scanned within archive
    $maxratio = 200; // maximal compression ratio
    $bz2archivememlim = 0; // limit memory usage for bzip2 (0/1)
    $maxfilesize = 10485760; // archived files larger than this value (in bytes) will not be scanned
 
    $command = $conf->global->MAIN_ANTIVIRUS_COMMAND;
    $param = $conf->global->MAIN_ANTIVIRUS_PARAM;
 
    $param = preg_replace('/%maxreclevel/', $maxreclevel, $param);
    $param = preg_replace('/%maxfiles/', $maxfiles, $param);
    $param = preg_replace('/%maxratio/', $maxratio, $param);
    $param = preg_replace('/%bz2archivememlim/', $bz2archivememlim, $param);
    $param = preg_replace('/%maxfilesize/', $maxfilesize, $param);
    $param = preg_replace('/%file/', trim($file), $param);
 
    if (!preg_match('/%file/', $conf->global->MAIN_ANTIVIRUS_PARAM)) {
      $param = $param." ".escapeshellarg(trim($file));
    }
 
    if (preg_match("/\s/", $command)) {
      $command = escapeshellarg($command); // Force use of quotes on command. Using escapeshellcmd fails.
    }
 
    $forbidden_chars_to_replace = array("*", "?", "\"", "<", ">", "|", "[", "]", ";", '°', '$');
    $ret = dol_sanitizePathName($command).' '.dol_string_nospecial($param, '_', $forbidden_chars_to_replace);
 
    //$ret=$command.' '.$param.' 2>&1';
    //print "xx".$ret."xx";exit;
 
    return $ret;
  }
}