diff options
Diffstat (limited to 'includes/getid3/module.archive.szip.php')
| -rw-r--r-- | includes/getid3/module.archive.szip.php | 102 |
1 files changed, 102 insertions, 0 deletions
diff --git a/includes/getid3/module.archive.szip.php b/includes/getid3/module.archive.szip.php new file mode 100644 index 0000000..8647967 --- /dev/null +++ b/includes/getid3/module.archive.szip.php @@ -0,0 +1,102 @@ +<?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; + + } + +} |