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='"c:\Program Files (x86)\ClamWin\bin\clamscan.exe" --database="C:\Program Files (x86)\ClamWin\lib" "c:\temp\aaa.txt"';
    $fullcommand .= ' 2>&1'; // This is to get error output

    $output = array();
    $return_var = 0;
    $safemode = ini_get("safe_mode");
    // Create a clean fullcommand
    dol_syslog("AntiVir::dol_avscan_file Run command=".$fullcommand." with safe_mode ".($safemode ? "on" : "off"));
    // Run CLI command. If run of Windows, you can get return with echo %ERRORLEVEL%
    $lastline = exec($fullcommand, $output, $return_var);

    if (is_null($output)) $output = array();

    //print "x".$lastline." - ".join(',',$output)." - ".$return_var."y";exit;

    /*
        $outputfile=$conf->admin->dir_temp.'/dol_avscan_file.out.'.session_id();
    $handle = fopen($outputfile, 'w');
    if ($handle)
    {
      $handlein = popen($fullcommand, 'r');
      while (!feof($handlein))
      {
        $read = fgets($handlein);
        fwrite($handle,$read);
      }
      pclose($handlein);

      $errormsg = fgets($handle,2048);
      $this->output=$errormsg;

      fclose($handle);

      if (! empty($conf->global->MAIN_UMASK))
        @chmod($outputfile, octdec($conf->global->MAIN_UMASK));
    }
    else
    {
      $langs->load("errors");
      dol_syslog("Failed to open file ".$outputfile,LOG_ERR);
      $this->error="ErrorFailedToWriteInDir";
      $return=-1;
    }
    */

    dol_syslog("AntiVir::dol_avscan_file Result return_var=".$return_var." output=".join(',', $output));

    $returncodevirus = 1;
    if ($return_var == $returncodevirus)  // Virus found
    {
      $this->errors = $output;
      return -99;
    }

    if ($return_var > 0)          // If other error
    {
      $this->errors = $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); // Use quotes on command. Using escapeshellcmd fails.

    $ret = $command.' '.$param;
    //$ret=$command.' '.$param.' 2>&1';
    //print "xx".$ret."xx";exit;

    return $ret;
  }
}