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<?php
/////////////////////////////////////////////////////////////////
/// getID3() by James Heinrich <info@getid3.org> //
// available at https://github.com/JamesHeinrich/getID3 //
// or https://www.getid3.org //
// or http://getid3.sourceforge.net //
// see readme.txt for more details //
/////////////////////////////////////////////////////////////////
// //
// module.archive.szip.php //
// module for analyzing SZIP compressed files //
// dependencies: NONE //
// ///
/////////////////////////////////////////////////////////////////
if (!defined('GETID3_INCLUDEPATH')) { // prevent path-exposing attacks that access modules directly on public webservers
exit;
}
class getid3_szip extends getid3_handler
{
/**
* @return bool
*/
public function Analyze() {
$info = &$this->getid3->info;
$this->fseek($info['avdataoffset']);
$SZIPHeader = $this->fread(6);
if (substr($SZIPHeader, 0, 4) != "SZ\x0A\x04") {
$this->error('Expecting "53 5A 0A 04" at offset '.$info['avdataoffset'].', found "'.getid3_lib::PrintHexBytes(substr($SZIPHeader, 0, 4)).'"');
return false;
}
$info['fileformat'] = 'szip';
$info['szip']['major_version'] = getid3_lib::BigEndian2Int(substr($SZIPHeader, 4, 1));
$info['szip']['minor_version'] = getid3_lib::BigEndian2Int(substr($SZIPHeader, 5, 1));
$this->error('SZIP parsing not enabled in this version of getID3() ['.$this->getid3->version().']');
return false;
while (!$this->feof()) {
$NextBlockID = $this->fread(2);
switch ($NextBlockID) {
case 'SZ':
// Note that szip files can be concatenated, this has the same effect as
// concatenating the files. this also means that global header blocks
// might be present between directory/data blocks.
$this->fseek(4, SEEK_CUR);
break;
case 'BH':
$BHheaderbytes = getid3_lib::BigEndian2Int($this->fread(3));
$BHheaderdata = $this->fread($BHheaderbytes);
$BHheaderoffset = 0;
while (strpos($BHheaderdata, "\x00", $BHheaderoffset) > 0) {
//filename as \0 terminated string (empty string indicates end)
//owner as \0 terminated string (empty is same as last file)
//group as \0 terminated string (empty is same as last file)
//3 byte filelength in this block
//2 byte access flags
//4 byte creation time (like in unix)
//4 byte modification time (like in unix)
//4 byte access time (like in unix)
$BHdataArray['filename'] = substr($BHheaderdata, $BHheaderoffset, strcspn($BHheaderdata, "\x00"));
$BHheaderoffset += (strlen($BHdataArray['filename']) + 1);
$BHdataArray['owner'] = substr($BHheaderdata, $BHheaderoffset, strcspn($BHheaderdata, "\x00"));
$BHheaderoffset += (strlen($BHdataArray['owner']) + 1);
$BHdataArray['group'] = substr($BHheaderdata, $BHheaderoffset, strcspn($BHheaderdata, "\x00"));
$BHheaderoffset += (strlen($BHdataArray['group']) + 1);
$BHdataArray['filelength'] = getid3_lib::BigEndian2Int(substr($BHheaderdata, $BHheaderoffset, 3));
$BHheaderoffset += 3;
$BHdataArray['access_flags'] = getid3_lib::BigEndian2Int(substr($BHheaderdata, $BHheaderoffset, 2));
$BHheaderoffset += 2;
$BHdataArray['creation_time'] = getid3_lib::BigEndian2Int(substr($BHheaderdata, $BHheaderoffset, 4));
$BHheaderoffset += 4;
$BHdataArray['modification_time'] = getid3_lib::BigEndian2Int(substr($BHheaderdata, $BHheaderoffset, 4));
$BHheaderoffset += 4;
$BHdataArray['access_time'] = getid3_lib::BigEndian2Int(substr($BHheaderdata, $BHheaderoffset, 4));
$BHheaderoffset += 4;
$info['szip']['BH'][] = $BHdataArray;
}
break;
default:
break 2;
}
}
return true;
}
}