Base class for the interface to an external virus scanner. More...

Inheritance diagram for ilVirusScanner:

Collaboration diagram for ilVirusScanner:

Public Member Functions
	ilVirusScanner ($a_scancommand, $a_cleancommand)
	Constructor public.
	scanFile ($a_filepath, $a_origname="")
	scan a file for viruses
	cleanFile ($a_filepath, $a_origname="")
	clean an infected file
	fileCleaned ()
	returns wether file has been cleaned successfully or not
	logScanResult ()
	write the result of the last scan to the log
	logCleanResult ()
	write the result of the last clean to the log
	getScanResult ()
	get the pure output of the external scan
	getCleanResult ()
	get the pure output of the external scan
	getScanMessage ()
	get a located message with the result from the last scan
	getCleanMessage ()
	get a located message with the result from the last clean
	getScanZipFiles ()
	get info if class can scan ZIP files

Data Fields
	$type
	$scanZipFiles
	$scanCommand
	$cleanCommand
	$scanFilePath
	$scanFileOrigName
	$cleanFilePath
	$cleanFileOrigName
	$scanFileIsInfected
	$cleanFileIsCleaned
	$scanResult
	$cleanResult
	$ilias
	$lng
	$log

Detailed Description

Base class for the interface to an external virus scanner.

This class is abstract and needs to be extended for actual scanners Only scanFile() and cleanFile() need to be redefined Child Constructors should call ilVirusScanner() Scan and Clean are independent and may work on different files Logging and message generation are generic

Author: Fred Neumann fred..nosp@m.neum.nosp@m.ann@f.nosp@m.im.u.nosp@m.ni-er.nosp@m.lang.nosp@m.en.de

Version: $Id$

Definition at line 18 of file class.ilVirusScanner.php.

Member Function Documentation

ilVirusScanner::cleanFile	(	$a_filepath,
		$a_origname = `""`
	)

clean an infected file

needs to be redefined in child classes here it simulates a clean "cleanable.txt" is expected to be cleanable

Parameters

string	path of file to check
string	original name of the file to clean

Returns: string clean message (empty if not cleaned) public

Reimplemented in ilVirusScannerSophos.

Definition at line 202 of file class.ilVirusScanner.php.

References $cleanResult, and logCleanResult().

        {
                // This function needs to be redefined in child classes
                // It should:
                // - call the external cleaner
                // - set cleanFilePath to a_filepath
                // - set cleanFileOrigName to a_origname
                // - set cleanFileIsCleaned according the clean result
                // - set cleanResult to the cleaner output message
                // - call logCleanResult in any case
                // - return the output message, if file is cleaned
                // - return an empty string, if file is not cleaned
                $this->cleanFilePath = $a_filepath;
                $this->cleanFileOrigName = $a_origname;
                if ($a_origname == "cleanable.txt")
                {
                        $this->cleanFileIsCleaned = true;
                        $this->cleanResult =
                                "FILE CLEANED: [". $a_filepath. "] (VIRUS: simulated)";
                        $this->logCleanResult();
                        return $this->cleanResult;
                }
                else
                {
                        $this->cleanFileIsCleaned = false;
                        $this->cleanResult =
                                "FILE NOT CLEANED: [". $a_filepath. "] (VIRUS: simulated)";
                        $this->logCleanResult();
                        return "";
                }
        }

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ilVirusScanner::fileCleaned ( )

returns wether file has been cleaned successfully or not

Returns: boolean true, if last clean operation has been successful

Definition at line 241 of file class.ilVirusScanner.php.

References $cleanFileIsCleaned.

        {
                return $this->cleanFileIsCleaned;
        }

ilVirusScanner::getCleanMessage ( )

get a located message with the result from the last clean

Returns: string public

Definition at line 335 of file class.ilVirusScanner.php.

References $cleanFileOrigName, and $ret.

        {
                if ($this->cleanFileIsCleaned)
                {
                        $ret = sprintf($this->lng->txt("virus_cleaned"), $this->cleanFileOrigName);
                }
                else
                {
                        $ret = sprintf($this->lng->txt("virus_not_cleaned"),$this->cleanFileOrigName);
                }
                if ($this->cleanResult)
                {
                        $ret .= " ". $this->lng->txt("virus_clean_message")
                                 . "<br />"
                                 . str_replace($this->cleanFilePath, $this->cleanFileOrigName,
                                                                nl2br($this->cleanResult));
                }
                return $ret;
        }

ilVirusScanner::getCleanResult ( )

get the pure output of the external scan

Returns: string public

Definition at line 297 of file class.ilVirusScanner.php.

References $cleanResult.

        {
                return $this->cleanResult;
        }

ilVirusScanner::getScanMessage ( )

get a located message with the result from the last scan

Returns: string public

Definition at line 308 of file class.ilVirusScanner.php.

References $ret, and $scanFileOrigName.

        {
                if ($this->scanFileIsInfected)
                {
                        $ret = sprintf($this->lng->txt("virus_infected"), $this->scanFileOrigName);
                }
                else
                {
                        $ret = sprintf($this->lng->txt("virus_not_infected"),$this->scanFileOrigName);
                }
                
                if ($this->scanResult)
                {
                        $ret .= " ". $this->lng->txt("virus_scan_message")
                                 . "<br />"
                                 . str_replace($this->scanFilePath, $this->scanFileOrigName,
                                                                nl2br($this->scanResult));
                }
                return $ret;
        }

ilVirusScanner::getScanResult ( )

get the pure output of the external scan

Returns: string public

Definition at line 286 of file class.ilVirusScanner.php.

References $scanResult.

        {
                return $this->scanResult;
        }

ilVirusScanner::getScanZipFiles ( )

get info if class can scan ZIP files

Returns: boolean public

Definition at line 362 of file class.ilVirusScanner.php.

References $scanZipFiles.

        {
                return $this->scanZipFiles;
        }

ilVirusScanner::ilVirusScanner	(	$a_scancommand,
		$a_cleancommand
	)

Constructor public.

Definition at line 131 of file class.ilVirusScanner.php.

References $ilias, $lng, and $log.

Referenced by ilVirusScannerAntiVir\ilVirusScannerAntivir(), ilVirusScannerClamAV\ilVirusScannerClamAV(), and ilVirusScannerSophos\ilVirusScannerSophos().

        {
                global $ilias, $lng, $log;
                $this->ilias = & $ilias;
                $this->lng = & $lng;
                $this->log = & $log;
                $this->scanCommand = $a_scancommand;
                $this->cleanCommand = $a_cleancommand;
                
                $this->type = "simulate";
                $this->scanZipFiles = false;
        }

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ilVirusScanner::logCleanResult ( )

write the result of the last clean to the log

public

Definition at line 268 of file class.ilVirusScanner.php.

Referenced by ilVirusScannerSophos\cleanFile(), and cleanFile().

        {
                $mess = "Virus Cleaner (". $this->type. ")";
                if ($this->cleanFileOrigName)
                {
                        $mess .= " (File ". $this->cleanFileOrigName. ")";
                }
                $mess .= ": " . ereg_replace("(\r|\n)+", "; ", $this->cleanResult);
                $this->log->write($mess);
        }

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ilVirusScanner::logScanResult ( )

write the result of the last scan to the log

public

Definition at line 251 of file class.ilVirusScanner.php.

Referenced by ilVirusScannerClamAV\scanFile(), ilVirusScannerSophos\scanFile(), ilVirusScannerAntiVir\scanFile(), and scanFile().

        {
                $mess = "Virus Scanner (". $this->type. ")";
                if ($this->scanFileOrigName)
                {
                        $mess .= " (File " . $this->scanFileOrigName . ")";
                }
                $mess .= ": " . ereg_replace("(\r|\n)+", "; ", $this->scanResult);
                $this->log->write($mess);
        }

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ilVirusScanner::scanFile	(	$a_filepath,
		$a_origname = `""`
	)

scan a file for viruses

needs to be redefined in child classes here it simulates a scan "infected.txt" or "cleanable.txt" are expected to be infected

Parameters

string	path of file to scan
string	original name of the file to scan

Returns: string virus message (empty if not infected) public

Reimplemented in ilVirusScannerAntiVir, ilVirusScannerSophos, and ilVirusScannerClamAV.

Definition at line 157 of file class.ilVirusScanner.php.

References $scanResult, and logScanResult().

        {
                // This function needs to be redefined in child classes.
                // It should:
                // - call the external scanner for a_filepath
                // - set scanFilePath to a_filepath
                // - set scanFileOrigName to a_origname
                // - set scanFileIsInfected according the scan result
                // - set scanResult to the scanner output message
                // - call logScanResult() if file is infected
                // - return the output message, if file is infected
                // - return an empty string, if file is not infected
                
                $this->scanFilePath = $a_filepath;
                $this->scanFileOrigName = $a_origname;
                
                if ($a_origname == "infected.txt" or $a_origname == "cleanable.txt")
                {
                        $this->scanFileIsInfected = true;
                        $this->scanResult =
                                "FILE INFECTED: [". $a_filepath. "] (VIRUS: simulated)";
                        $this->logScanResult();
                        return $this->scanResult;
                }
                else
                {
                        $this->scanFileIsInfected = false;
                        $this->scanResult = "";
                        return "";
                }
        }