File indexing completed on 2024-05-12 17:25:55
0001 <?php 0002 ///////////////////////////////////////////////////////////////// 0003 /// getID3() by James Heinrich <info@getid3.org> // 0004 // available at http://getid3.sourceforge.net // 0005 // or http://www.getid3.org // 0006 // also https://github.com/JamesHeinrich/getID3 // 0007 ///////////////////////////////////////////////////////////////// 0008 // See readme.txt for more details // 0009 ///////////////////////////////////////////////////////////////// 0010 // // 0011 // module.archive.szip.php // 0012 // module for analyzing SZIP compressed files // 0013 // dependencies: NONE // 0014 // /// 0015 ///////////////////////////////////////////////////////////////// 0016 0017 0018 class getid3_szip extends getid3_handler 0019 { 0020 0021 public function Analyze() { 0022 $info = &$this->getid3->info; 0023 0024 $this->fseek($info['avdataoffset']); 0025 $SZIPHeader = $this->fread(6); 0026 if (substr($SZIPHeader, 0, 4) != "SZ\x0A\x04") { 0027 $info['error'][] = 'Expecting "53 5A 0A 04" at offset '.$info['avdataoffset'].', found "'.getid3_lib::PrintHexBytes(substr($SZIPHeader, 0, 4)).'"'; 0028 return false; 0029 } 0030 $info['fileformat'] = 'szip'; 0031 $info['szip']['major_version'] = getid3_lib::BigEndian2Int(substr($SZIPHeader, 4, 1)); 0032 $info['szip']['minor_version'] = getid3_lib::BigEndian2Int(substr($SZIPHeader, 5, 1)); 0033 $info['error'][] = 'SZIP parsing not enabled in this version of getID3() ['.$this->getid3->version().']'; 0034 return false; 0035 0036 while (!$this->feof()) { 0037 $NextBlockID = $this->fread(2); 0038 switch ($NextBlockID) { 0039 case 'SZ': 0040 // Note that szip files can be concatenated, this has the same effect as 0041 // concatenating the files. this also means that global header blocks 0042 // might be present between directory/data blocks. 0043 $this->fseek(4, SEEK_CUR); 0044 break; 0045 0046 case 'BH': 0047 $BHheaderbytes = getid3_lib::BigEndian2Int($this->fread(3)); 0048 $BHheaderdata = $this->fread($BHheaderbytes); 0049 $BHheaderoffset = 0; 0050 while (strpos($BHheaderdata, "\x00", $BHheaderoffset) > 0) { 0051 //filename as \0 terminated string (empty string indicates end) 0052 //owner as \0 terminated string (empty is same as last file) 0053 //group as \0 terminated string (empty is same as last file) 0054 //3 byte filelength in this block 0055 //2 byte access flags 0056 //4 byte creation time (like in unix) 0057 //4 byte modification time (like in unix) 0058 //4 byte access time (like in unix) 0059 0060 $BHdataArray['filename'] = substr($BHheaderdata, $BHheaderoffset, strcspn($BHheaderdata, "\x00")); 0061 $BHheaderoffset += (strlen($BHdataArray['filename']) + 1); 0062 0063 $BHdataArray['owner'] = substr($BHheaderdata, $BHheaderoffset, strcspn($BHheaderdata, "\x00")); 0064 $BHheaderoffset += (strlen($BHdataArray['owner']) + 1); 0065 0066 $BHdataArray['group'] = substr($BHheaderdata, $BHheaderoffset, strcspn($BHheaderdata, "\x00")); 0067 $BHheaderoffset += (strlen($BHdataArray['group']) + 1); 0068 0069 $BHdataArray['filelength'] = getid3_lib::BigEndian2Int(substr($BHheaderdata, $BHheaderoffset, 3)); 0070 $BHheaderoffset += 3; 0071 0072 $BHdataArray['access_flags'] = getid3_lib::BigEndian2Int(substr($BHheaderdata, $BHheaderoffset, 2)); 0073 $BHheaderoffset += 2; 0074 0075 $BHdataArray['creation_time'] = getid3_lib::BigEndian2Int(substr($BHheaderdata, $BHheaderoffset, 4)); 0076 $BHheaderoffset += 4; 0077 0078 $BHdataArray['modification_time'] = getid3_lib::BigEndian2Int(substr($BHheaderdata, $BHheaderoffset, 4)); 0079 $BHheaderoffset += 4; 0080 0081 $BHdataArray['access_time'] = getid3_lib::BigEndian2Int(substr($BHheaderdata, $BHheaderoffset, 4)); 0082 $BHheaderoffset += 4; 0083 0084 $info['szip']['BH'][] = $BHdataArray; 0085 } 0086 break; 0087 0088 default: 0089 break 2; 0090 } 0091 } 0092 0093 return true; 0094 0095 } 0096 0097 }