/usr/share/php/Horde/Compress/Zip.php is in php-horde-compress 2.2.1-1ubuntu1.
This file is owned by root:root, with mode 0o644.
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/**
* Copyright 2000-2017 Horde LLC (http://www.horde.org/)
*
* See the enclosed file COPYING for license information (LGPL). If you
* did not receive this file, see http://www.horde.org/licenses/lgpl21.
*
* The ZIP compression code is partially based on code from:
* Eric Mueller <eric@themepark.com>
* http://www.zend.com/codex.php?id=535&single=1
*
* Deins125 <webmaster@atlant.ru>
* http://www.zend.com/codex.php?id=470&single=1
*
* The ZIP compression date code is partially based on code from
* Peter Listiak <mlady@users.sourceforge.net>
*
* Official ZIP file format: https://support.pkware.com/display/PKZIP/APPNOTE
*
* @author Chuck Hagenbuch <chuck@horde.org>
* @author Michael Cochrane <mike@graftonhall.co.nz>
* @author Michael Slusarz <slusarz@horde.org>
* @category Horde
* @license http://www.horde.org/licenses/lgpl21 LGPL 2.1
* @package Compress
*/
/**
* The Horde_Compress_zip class allows ZIP files to be created and read.
*
* @author Chuck Hagenbuch <chuck@horde.org>
* @author Michael Cochrane <mike@graftonhall.co.nz>
* @author Michael Slusarz <slusarz@horde.org>
* @category Horde
* @copyright 2000-2017 Horde LLC
* @license http://www.horde.org/licenses/lgpl21 LGPL 2.1
* @package Compress
*/
class Horde_Compress_Zip extends Horde_Compress_Base
{
/**
* Return file list.
*
* @see decompress().
*/
const ZIP_LIST = 1;
/**
* Return file data.
*
* @see decompress().
*/
const ZIP_DATA = 2;
/**
* Beginning of central directory record.
*/
const CTRL_DIR_HEADER = "\x50\x4b\x01\x02";
/**
* End of central directory record.
*/
const CTRL_DIR_END = "\x50\x4b\x05\x06\x00\x00\x00\x00";
/**
* Beginning of file contents.
*/
const FILE_HEADER = "\x50\x4b\x03\x04";
/**
*/
public $canCompress = true;
/**
*/
public $canDecompress = true;
/**
* ZIP compression methods.
*
* @var array
*/
protected $_methods = array(
0x0 => 'None',
0x1 => 'Shrunk',
0x2 => 'Super Fast',
0x3 => 'Fast',
0x4 => 'Normal',
0x5 => 'Maximum',
0x6 => 'Imploded',
0x8 => 'Deflated'
);
/**
* Temporary data for compressing files.
*
* @var array
*/
protected $_ctrldir;
/**
* Temporary contents for compressing files.
*
* @var resource
*/
protected $_tmp;
/**
* @param array $data The data to compress. Requires an array of
* arrays. Each subarray should contain these
* fields:
* - data: (string/resource) The data to compress.
* - name: (string) The pathname to the file.
* - time: (integer) [optional] The timestamp to use for the file.
* @param array $params The parameter array.
* - stream: (boolean) If set, return a stream instead of a string.
* DEFAULT: Return string
*
* @return mixed The ZIP file as either a string or a stream resource.
*/
public function compress($data, array $params = array())
{
if (!Horde_Util::extensionExists('zlib')) {
throw new Horde_Compress_Exception(
Horde_Compress_Translation::t(
"This server can't compress zip files."
)
);
}
$this->_ctrldir = array();
$this->_tmp = fopen('php://temp', 'r+');
foreach ($data as $val) {
$this->_addToZipFile($val);
}
/* Create the ZIP file. */
$dir = implode('', $this->_ctrldir);
fseek($this->_tmp, 0, SEEK_END);
$offset = ftell($this->_tmp);
fwrite(
$this->_tmp,
$dir . self::CTRL_DIR_END .
/* Total # of entries "on this disk". */
pack('v', count($this->_ctrldir)) .
/* Total # of entries overall. */
pack('v', count($this->_ctrldir)) .
/* Size of central directory. */
pack('V', strlen($dir)) .
/* Offset to start of central dir. */
pack('V', $offset) .
/* ZIP file comment length. */
"\x00\x00"
);
rewind($this->_tmp);
if (empty($params['stream'])) {
$out = stream_get_contents($this->_tmp);
fclose($this->_tmp);
return $out;
}
return $this->_tmp;
}
/**
* @param array $params The parameter array.
* - action: (integer) [REQUIRED] The action to take on the data. Either
* self::ZIP_LIST or self::ZIP_DATA.
* - info: (array) [REQUIRED for ZIP_DATA] The zipfile list.
* - key: (integer) [REQUIRED for ZIP_DATA] The position of the file in
* the archive list.
*
* @return mixed If action is self::ZIP_DATA, the uncompressed data. If
* action is self::ZIP_LIST, an array with the KEY as the
* position in the zipfile and these values:
* - attr: File attributes
* - crc: CRC checksum
* - csize: Compressed file size
* - date: File modification time
* - name: Filename
* - method: Compression method
* - size: Original file size
* - type: File type
* @throws Horde_Compress_Exception
*/
public function decompress($data, array $params = array())
{
if (isset($params['action'])) {
switch ($params['action']) {
case self::ZIP_LIST:
return $this->_getZipInfo($data);
case self::ZIP_DATA:
return $this->_getZipData(
$data, $params['info'], $params['key']
);
}
}
}
/**
* Get the list of files/data from the zip archive.
*
* @param string $data The zipfile data.
*
* @return array See decompress() for the format.
*
* @throws Horde_Compress_Exception
*/
protected function _getZipInfo($data)
{
$entries = array();
/* Get details from Central directory structure. */
$fhStart = strpos($data, self::CTRL_DIR_HEADER);
do {
if (strlen($data) < $fhStart + 31) {
throw new Horde_Compress_Exception(
Horde_Compress_Translation::t("Invalid ZIP data")
);
}
$info = unpack(
'vMethod/VTime/VCRC32/VCompressed/VUncompressed/vLength',
substr($data, $fhStart + 10, 20)
);
if (!isset($this->_methods[$info['Method']])) {
throw new Horde_Compress_Exception(
Horde_Compress_Translation::t("Invalid ZIP data")
);
}
$name = substr($data, $fhStart + 46, $info['Length']);
$entries[$name] = array(
'attr' => null,
'crc' => sprintf("%08s", dechex($info['CRC32'])),
'csize' => $info['Compressed'],
'date' => null,
'_dataStart' => null,
'name' => $name,
'method' => $this->_methods[$info['Method']],
'_method' => $info['Method'],
'size' => $info['Uncompressed'],
'type' => null
);
$entries[$name]['date'] =
mktime((($info['Time'] >> 11) & 0x1f),
(($info['Time'] >> 5) & 0x3f),
(($info['Time'] << 1) & 0x3e),
(($info['Time'] >> 21) & 0x0f),
(($info['Time'] >> 16) & 0x1f),
((($info['Time'] >> 25) & 0x7f) + 1980));
if (strlen($data) < $fhStart + 43) {
throw new Horde_Compress_Exception(
Horde_Compress_Translation::t("Invalid ZIP data")
);
}
$info = unpack(
'vInternal/VExternal',
substr($data, $fhStart + 36, 6)
);
$entries[$name]['type'] = ($info['Internal'] & 0x01)
? 'text'
: 'binary';
$entries[$name]['attr'] =
(($info['External'] & 0x10) ? 'D' : '-') .
(($info['External'] & 0x20) ? 'A' : '-') .
(($info['External'] & 0x03) ? 'S' : '-') .
(($info['External'] & 0x02) ? 'H' : '-') .
(($info['External'] & 0x01) ? 'R' : '-');
} while (($fhStart = strpos($data, self::CTRL_DIR_HEADER, $fhStart + 46)) !== false);
/* Get details from local file header. */
$fhStart = strpos($data, self::FILE_HEADER);
$data_len = strlen($data);
do {
if ($data_len < $fhStart + 34) {
throw new Horde_Compress_Exception(
Horde_Compress_Translation::t("Invalid ZIP data")
);
}
$info = unpack(
'vMethod/VTime/VCRC32/VCompressed/VUncompressed/vLength/vExtraLength',
substr($data, $fhStart + 8, 25)
);
$name = substr($data, $fhStart + 30, $info['Length']);
if (isset($entries[$name])) {
$entries[$name]['_dataStart'] = $fhStart + 30
+ $info['Length'] + $info['ExtraLength'];
}
} while ($data_len > $fhStart + 30 + $info['Length'] &&
($fhStart = strpos($data, self::FILE_HEADER, $fhStart + 30 + $info['Length'])) !== false);
return array_values($entries);
}
/**
* Returns the data for a specific archived file.
*
* @param string $data The zip archive contents.
* @param array $info The information array from _getZipInfo().
* @param integer $key The position of the file in the archive.
*
* @return string The file data.
*/
protected function _getZipData($data, $info, $key)
{
if (($info[$key]['_method'] == 0x8) &&
Horde_Util::extensionExists('zlib')) {
/* If the file has been deflated, and zlib is installed,
then inflate the data again. */
return @gzinflate(
substr($data, $info[$key]['_dataStart'], $info[$key]['csize'])
);
} elseif ($info[$key]['_method'] == 0x0) {
/* Files that aren't compressed. */
return substr(
$data, $info[$key]['_dataStart'], $info[$key]['csize']
);
}
return '';
}
/**
* Checks to see if the data is a valid ZIP file.
*
* @param string $data The ZIP file data.
*
* @return boolean True if valid, false if invalid.
*/
public function checkZipData($data)
{
return (strpos($data, self::FILE_HEADER) !== false);
}
/**
* Converts a UNIX timestamp to a 4-byte DOS date and time format (date in
* high 2-bytes, time in low 2-bytes allowing magnitude comparison).
*
* @param integer $unixtime The current UNIX timestamp.
*
* @return integer The current date in a 4-byte DOS format.
*/
protected function _unix2DOSTime($unixtime = null)
{
$timearray = (is_null($unixtime)) ? getdate() : getdate($unixtime);
if ($timearray['year'] < 1980) {
$timearray['year'] = 1980;
$timearray['mon'] = 1;
$timearray['mday'] = 1;
$timearray['hours'] = 0;
$timearray['minutes'] = 0;
$timearray['seconds'] = 0;
}
return (($timearray['year'] - 1980) << 25) |
($timearray['mon'] << 21) |
($timearray['mday'] << 16) |
($timearray['hours'] << 11) |
($timearray['minutes'] << 5) |
($timearray['seconds'] >> 1);
}
/**
* Adds a "file" to the ZIP archive.
*
* @param array $file See self::createZipFile().
*/
protected function _addToZipFile($file)
{
$name = str_replace('\\', '/', $file['name']);
/* See if time/date information has been provided. */
$ftime = (isset($file['time'])) ? $file['time'] : null;
/* Get the hex time. */
$dtime = sprintf('%08s', dechex($this->_unix2DosTime($ftime)));
$hexdtime = chr(hexdec($dtime[6] . $dtime[7])) .
chr(hexdec($dtime[4] . $dtime[5])) .
chr(hexdec($dtime[2] . $dtime[3])) .
chr(hexdec($dtime[0] . $dtime[1]));
/* "Local file header" segment. */
if (is_resource($file['data'])) {
$zdata = fopen('php://temp', 'r+');
$params = new stdClass;
stream_filter_register(
'horde_compress_filter_crc32', 'Horde_Stream_Filter_Crc32'
);
$filter = stream_filter_prepend(
$file['data'],
'horde_compress_filter_crc32',
STREAM_FILTER_READ,
$params
);
$filter2 = stream_filter_append(
$zdata,
'zlib.deflate',
STREAM_FILTER_WRITE
);
rewind($file['data']);
stream_copy_to_stream($file['data'], $zdata);
$crc = $params->crc32;
$unc_len = ftell($file['data']);
stream_filter_remove($filter2);
stream_filter_remove($filter);
fseek($zdata, 0, SEEK_END);
$c_len = ftell($zdata);
} else {
$unc_len = strlen($file['data']);
$crc = crc32($file['data']);
$zdata = gzdeflate($file['data']);
$c_len = strlen($zdata);
}
/* Common data for the two entries. */
$common =
"\x14\x00" . /* Version needed to extract. */
"\x00\x00" . /* General purpose bit flag. */
"\x08\x00" . /* Compression method. */
$hexdtime . /* Last modification time/date. */
pack('V', $crc) . /* CRC 32 information. */
pack('V', $c_len) . /* Compressed filesize. */
pack('V', $unc_len) . /* Uncompressed filesize. */
pack('v', strlen($name)) . /* Length of filename. */
pack('v', 0); /* Extra field length. */
/* Add this entry to zip data. */
fseek($this->_tmp, 0, SEEK_END);
$old_offset = ftell($this->_tmp);
fwrite($this->_tmp,
self::FILE_HEADER . /* Begin creating the ZIP data. */
$common . /* Common data. */
$name
);
/* "File data" segment. */
if (is_resource($zdata)) {
rewind($zdata);
stream_copy_to_stream($zdata, $this->_tmp);
} else {
fwrite($this->_tmp, $zdata);
}
/* Add to central directory record. */
$this->_ctrldir[] =
self::CTRL_DIR_HEADER .
"\x00\x00" . /* Version made by. */
$common . /* Common data. */
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. */
$name; /* File name. */
}
}
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