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<?php /* vim: set expandtab sw=4 ts=4 sts=4: */ /** * Interface for the zip extension * * @package PhpMyAdmin */ declare(strict_types=1); namespace PhpMyAdmin; use ZipArchive; /** * Transformations class * * @package PhpMyAdmin */ class ZipExtension { /** * @var ZipArchive */ private $zip; /** * Constructor */ public function __construct() { $this->zip = new ZipArchive(); } /** * Gets zip file contents * * @param string $file path to zip file * @param string $specific_entry regular expression to match a file * * @return array ($error_message, $file_data); $error_message * is empty if no error */ public function getContents($file, $specific_entry = null) { /** * This function is used to "import" a SQL file which has been exported earlier * That means that this function works on the assumption that the zip file contains only a single SQL file * It might also be an ODS file, look below */ $error_message = ''; $file_data = ''; $res = $this->zip->open($file); if ($res === true) { if ($this->zip->numFiles === 0) { $error_message = __('No files found inside ZIP archive!'); $this->zip->close(); return [ 'error' => $error_message, 'data' => $file_data, ]; } /* Is the the zip really an ODS file? */ $ods_mime = 'application/vnd.oasis.opendocument.spreadsheet'; $first_zip_entry = $this->zip->getFromIndex(0); if (! strcmp($ods_mime, $first_zip_entry)) { $specific_entry = '/^content\.xml$/'; } if (! isset($specific_entry)) { $file_data = $first_zip_entry; $this->zip->close(); return [ 'error' => $error_message, 'data' => $file_data, ]; } /* Return the correct contents, not just the first entry */ for ($i = 0; $i < $this->zip->numFiles; $i++) { if (@preg_match($specific_entry, $this->zip->getNameIndex($i))) { $file_data = $this->zip->getFromIndex($i); break; } } /* Couldn't find any files that matched $specific_entry */ if (empty($file_data)) { $error_message = __('Error in ZIP archive:') . ' Could not find "' . $specific_entry . '"'; } $this->zip->close(); return [ 'error' => $error_message, 'data' => $file_data, ]; } else { $error_message = __('Error in ZIP archive:') . ' ' . $this->zip->getStatusString(); $this->zip->close(); return [ 'error' => $error_message, 'data' => $file_data, ]; } } /** * Returns the filename of the first file that matches the given $file_regexp. * * @param string $file path to zip file * @param string $regex regular expression for the file name to match * * @return string|false the file name of the first file that matches the given regular expression */ public function findFile($file, $regex) { $res = $this->zip->open($file); if ($res === true) { for ($i = 0; $i < $this->zip->numFiles; $i++) { if (preg_match($regex, $this->zip->getNameIndex($i))) { $filename = $this->zip->getNameIndex($i); $this->zip->close(); return $filename; } } } return false; } /** * Returns the number of files in the zip archive. * * @param string $file path to zip file * * @return int the number of files in the zip archive or 0, either if there wern't any files or an error occured. */ public function getNumberOfFiles($file) { $num = 0; $res = $this->zip->open($file); if ($res === true) { $num = $this->zip->numFiles; } return $num; } /** * Extracts the content of $entry. * * @param string $file path to zip file * @param string $entry file in the archive that should be extracted * * @return string|bool data on sucess, false otherwise */ public function extract($file, $entry) { if ($this->zip->open($file) === true) { $result = $this->zip->getFromName($entry); $this->zip->close(); return $result; } return false; } /** * Creates a zip file. * If $data is an array and $name is a string, the filenames will be indexed. * The function will return false if $data is a string but $name is an array * or if $data is an array and $name is an array, but they don't have the * same amount of elements. * * @param array|string $data contents of the file/files * @param array|string $name name of the file/files in the archive * @param integer $time the current timestamp * * @return string|bool the ZIP file contents, or false if there was an error. */ public function createFile($data, $name, $time = 0) { $datasec = []; // Array to store compressed data $ctrl_dir = []; // Central directory $old_offset = 0; // Last offset position $eof_ctrl_dir = "\x50\x4b\x05\x06\x00\x00\x00\x00"; // End of central directory record if (is_string($data) && is_string($name)) { $data = [$name => $data]; } elseif (is_array($data) && is_string($name)) { $ext_pos = strpos($name, '.'); $extension = substr($name, $ext_pos); $newData = []; foreach ($data as $key => $value) { $newName = str_replace( $extension, '_' . $key . $extension, $name ); $newData[$newName] = $value; } $data = $newData; } elseif (is_array($data) && is_array($name) && count($data) === count($name)) { $data = array_combine($name, $data); } else { return false; } foreach ($data as $table => $dump) { $temp_name = str_replace('\\', '/', $table); /* Get Local Time */ $timearray = getdate(); if ($timearray['year'] < 1980) { $timearray['year'] = 1980; $timearray['mon'] = 1; $timearray['mday'] = 1; $timearray['hours'] = 0; $timearray['minutes'] = 0; $timearray['seconds'] = 0; } $time = (($timearray['year'] - 1980) << 25) | ($timearray['mon'] << 21) | ($timearray['mday'] << 16) | ($timearray['hours'] << 11) | ($timearray['minutes'] << 5) | ($timearray['seconds'] >> 1); $hexdtime = pack('V', $time); $unc_len = strlen($dump); $crc = crc32($dump); $zdata = gzcompress($dump); $zdata = substr(substr($zdata, 0, strlen($zdata) - 4), 2); // fix crc bug $c_len = strlen($zdata); $fr = "\x50\x4b\x03\x04" . "\x14\x00" // ver needed to extract . "\x00\x00" // gen purpose bit flag . "\x08\x00" // compression method . $hexdtime // last mod time and date // "local file header" segment . pack('V', $crc) // crc32 . pack('V', $c_len) // compressed filesize . pack('V', $unc_len) // uncompressed filesize . pack('v', strlen($temp_name)) // length of filename . pack('v', 0) // extra field length . $temp_name // "file data" segment . $zdata; $datasec[] = $fr; // now add to central directory record $cdrec = "\x50\x4b\x01\x02" . "\x00\x00" // version made by . "\x14\x00" // version needed to extract . "\x00\x00" // gen purpose bit flag . "\x08\x00" // compression method . $hexdtime // last mod time & date . pack('V', $crc) // crc32 . pack('V', $c_len) // compressed filesize . pack('V', $unc_len) // uncompressed filesize . pack('v', strlen($temp_name)) // length of filename . pack('v', 0) // extra field length . pack('v', 0) // file comment length . pack('v', 0) // disk number start . pack('v', 0) // internal file attributes . pack('V', 32) // external file attributes // - 'archive' bit set . pack('V', $old_offset) // relative offset of local header . $temp_name; // filename $old_offset += strlen($fr); // optional extra field, file comment goes here // save to central directory $ctrl_dir[] = $cdrec; } /* Build string to return */ $temp_ctrldir = implode('', $ctrl_dir); $header = $temp_ctrldir . $eof_ctrl_dir . pack('v', count($ctrl_dir)) . //total #of entries "on this disk" pack('v', count($ctrl_dir)) . //total #of entries overall pack('V', strlen($temp_ctrldir)) . //size of central dir pack('V', $old_offset) . //offset to start of central dir "\x00\x00"; //.zip file comment length $data = implode('', $datasec); return $data . $header; } }