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d7_to_d10_migration/drupal7/web/modules/system/system.tar.inc

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2024-07-23 03:38:34 +00:00
<?php
/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
/**
* File::CSV
*
* PHP versions 4 and 5
*
* Copyright (c) 1997-2008,
* Vincent Blavet <vincent@phpconcept.net>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* @category File_Formats
* @package Archive_Tar
* @author Vincent Blavet <vincent@phpconcept.net>
* @copyright 1997-2010 The Authors
* @license http://www.opensource.org/licenses/bsd-license.php New BSD License
* @version CVS: $Id$
* @link http://pear.php.net/package/Archive_Tar
*/
/**
* Note on Drupal 7 porting.
* This file origin is Tar.php, release 1.4.14 (stable) with some code
* from PEAR.php, release 1.10.10 (stable) both at http://pear.php.net.
* To simplify future porting from pear of this file, you should not
* do cosmetic or other non significant changes to this file.
* The following changes have been done:
* Removed require_once 'PEAR.php'.
* Added defintion of OS_WINDOWS taken from PEAR.php.
* Removed extends PEAR from class.
* Removed call parent:: __construct().
* Changed PEAR::loadExtension($extname) to this->loadExtension($extname).
* Added function loadExtension() taken from PEAR.php.
* Changed all calls of unlink() to drupal_unlink().
* Changed $this->error_object = &$this->raiseError($p_message)
* to throw new Exception($p_message).
*/
// Drupal removal require_once 'PEAR.php'.
// Drupal addition OS_WINDOWS as defined in PEAR.php.
if (substr(PHP_OS, 0, 3) == 'WIN') {
define('OS_WINDOWS', true);
} else {
define('OS_WINDOWS', false);
}
define('ARCHIVE_TAR_ATT_SEPARATOR', 90001);
define('ARCHIVE_TAR_END_BLOCK', pack("a512", ''));
if (!function_exists('gzopen') && function_exists('gzopen64')) {
function gzopen($filename, $mode, $use_include_path = 0)
{
return gzopen64($filename, $mode, $use_include_path);
}
}
if (!function_exists('gztell') && function_exists('gztell64')) {
function gztell($zp)
{
return gztell64($zp);
}
}
if (!function_exists('gzseek') && function_exists('gzseek64')) {
function gzseek($zp, $offset, $whence = SEEK_SET)
{
return gzseek64($zp, $offset, $whence);
}
}
/**
* Creates a (compressed) Tar archive
*
* @package Archive_Tar
* @author Vincent Blavet <vincent@phpconcept.net>
* @license http://www.opensource.org/licenses/bsd-license.php New BSD License
* @version $Revision$
*/
// Drupal change class Archive_Tar extends PEAR.
class Archive_Tar
{
/**
* @var string Name of the Tar
*/
public $_tarname = '';
/**
* @var boolean if true, the Tar file will be gzipped
*/
public $_compress = false;
/**
* @var string Type of compression : 'none', 'gz', 'bz2' or 'lzma2'
*/
public $_compress_type = 'none';
/**
* @var string Explode separator
*/
public $_separator = ' ';
/**
* @var file descriptor
*/
public $_file = 0;
/**
* @var string Local Tar name of a remote Tar (http:// or ftp://)
*/
public $_temp_tarname = '';
/**
* @var string regular expression for ignoring files or directories
*/
public $_ignore_regexp = '';
/**
* @var object PEAR_Error object
*/
public $error_object = null;
/**
* Format for data extraction
*
* @var string
*/
public $_fmt = '';
/**
* @var int Length of the read buffer in bytes
*/
protected $buffer_length;
/**
* Archive_Tar Class constructor. This flavour of the constructor only
* declare a new Archive_Tar object, identifying it by the name of the
* tar file.
* If the compress argument is set the tar will be read or created as a
* gzip or bz2 compressed TAR file.
*
* @param string $p_tarname The name of the tar archive to create
* @param string $p_compress can be null, 'gz', 'bz2' or 'lzma2'. This
* parameter indicates if gzip, bz2 or lzma2 compression
* is required. For compatibility reason the
* boolean value 'true' means 'gz'.
* @param int $buffer_length Length of the read buffer in bytes
*
* @return bool
*/
public function __construct($p_tarname, $p_compress = null, $buffer_length = 512)
{
// Drupal removal parent::__construct().
$this->_compress = false;
$this->_compress_type = 'none';
if (($p_compress === null) || ($p_compress == '')) {
if (@file_exists($p_tarname)) {
if ($fp = @fopen($p_tarname, "rb")) {
// look for gzip magic cookie
$data = fread($fp, 2);
fclose($fp);
if ($data == "\37\213") {
$this->_compress = true;
$this->_compress_type = 'gz';
// No sure it's enought for a magic code ....
} elseif ($data == "BZ") {
$this->_compress = true;
$this->_compress_type = 'bz2';
} elseif (file_get_contents($p_tarname, false, null, 1, 4) == '7zXZ') {
$this->_compress = true;
$this->_compress_type = 'lzma2';
}
}
} else {
// probably a remote file or some file accessible
// through a stream interface
if (substr($p_tarname, -2) == 'gz') {
$this->_compress = true;
$this->_compress_type = 'gz';
} elseif ((substr($p_tarname, -3) == 'bz2') ||
(substr($p_tarname, -2) == 'bz')
) {
$this->_compress = true;
$this->_compress_type = 'bz2';
} else {
if (substr($p_tarname, -2) == 'xz') {
$this->_compress = true;
$this->_compress_type = 'lzma2';
}
}
}
} else {
if (($p_compress === true) || ($p_compress == 'gz')) {
$this->_compress = true;
$this->_compress_type = 'gz';
} else {
if ($p_compress == 'bz2') {
$this->_compress = true;
$this->_compress_type = 'bz2';
} else {
if ($p_compress == 'lzma2') {
$this->_compress = true;
$this->_compress_type = 'lzma2';
} else {
$this->_error(
"Unsupported compression type '$p_compress'\n" .
"Supported types are 'gz', 'bz2' and 'lzma2'.\n"
);
return false;
}
}
}
}
$this->_tarname = $p_tarname;
if ($this->_compress) { // assert zlib or bz2 or xz extension support
if ($this->_compress_type == 'gz') {
$extname = 'zlib';
} else {
if ($this->_compress_type == 'bz2') {
$extname = 'bz2';
} else {
if ($this->_compress_type == 'lzma2') {
$extname = 'xz';
}
}
}
if (!extension_loaded($extname)) {
// Drupal change PEAR::loadExtension($extname).
$this->loadExtension($extname);
}
if (!extension_loaded($extname)) {
$this->_error(
"The extension '$extname' couldn't be found.\n" .
"Please make sure your version of PHP was built " .
"with '$extname' support.\n"
);
return false;
}
}
if (version_compare(PHP_VERSION, "5.5.0-dev") < 0) {
$this->_fmt = "a100filename/a8mode/a8uid/a8gid/a12size/a12mtime/" .
"a8checksum/a1typeflag/a100link/a6magic/a2version/" .
"a32uname/a32gname/a8devmajor/a8devminor/a131prefix";
} else {
$this->_fmt = "Z100filename/Z8mode/Z8uid/Z8gid/Z12size/Z12mtime/" .
"Z8checksum/Z1typeflag/Z100link/Z6magic/Z2version/" .
"Z32uname/Z32gname/Z8devmajor/Z8devminor/Z131prefix";
}
$this->buffer_length = $buffer_length;
}
public function __destruct()
{
$this->_close();
// ----- Look for a local copy to delete
if ($this->_temp_tarname != '' && (bool) preg_match('/^tar[[:alnum:]]*\.tmp$/', $this->_temp_tarname)) {
@drupal_unlink($this->_temp_tarname);
}
}
// Drupal addition from PEAR.php.
/**
* OS independent PHP extension load. Remember to take care
* on the correct extension name for case sensitive OSes.
*
* @param string $ext The extension name
* @return bool Success or not on the dl() call
*/
public static function loadExtension($ext)
{
if (extension_loaded($ext)) {
return true;
}
// if either returns true dl() will produce a FATAL error, stop that
if (
function_exists('dl') === false ||
ini_get('enable_dl') != 1
) {
return false;
}
if (OS_WINDOWS) {
$suffix = '.dll';
} elseif (PHP_OS == 'HP-UX') {
$suffix = '.sl';
} elseif (PHP_OS == 'AIX') {
$suffix = '.a';
} elseif (PHP_OS == 'OSX') {
$suffix = '.bundle';
} else {
$suffix = '.so';
}
return @dl('php_'.$ext.$suffix) || @dl($ext.$suffix);
}
/**
* This method creates the archive file and add the files / directories
* that are listed in $p_filelist.
* If a file with the same name exist and is writable, it is replaced
* by the new tar.
* The method return false and a PEAR error text.
* The $p_filelist parameter can be an array of string, each string
* representing a filename or a directory name with their path if
* needed. It can also be a single string with names separated by a
* single blank.
* For each directory added in the archive, the files and
* sub-directories are also added.
* See also createModify() method for more details.
*
* @param array $p_filelist An array of filenames and directory names, or a
* single string with names separated by a single
* blank space.
*
* @return true on success, false on error.
* @see createModify()
*/
public function create($p_filelist)
{
return $this->createModify($p_filelist, '', '');
}
/**
* This method add the files / directories that are listed in $p_filelist in
* the archive. If the archive does not exist it is created.
* The method return false and a PEAR error text.
* The files and directories listed are only added at the end of the archive,
* even if a file with the same name is already archived.
* See also createModify() method for more details.
*
* @param array $p_filelist An array of filenames and directory names, or a
* single string with names separated by a single
* blank space.
*
* @return true on success, false on error.
* @see createModify()
* @access public
*/
public function add($p_filelist)
{
return $this->addModify($p_filelist, '', '');
}
/**
* @param string $p_path
* @param bool $p_preserve
* @param bool $p_symlinks
* @return bool
*/
public function extract($p_path = '', $p_preserve = false, $p_symlinks = true)
{
return $this->extractModify($p_path, '', $p_preserve, $p_symlinks);
}
/**
* @return array|int
*/
public function listContent()
{
$v_list_detail = array();
if ($this->_openRead()) {
if (!$this->_extractList('', $v_list_detail, "list", '', '')) {
unset($v_list_detail);
$v_list_detail = 0;
}
$this->_close();
}
return $v_list_detail;
}
/**
* This method creates the archive file and add the files / directories
* that are listed in $p_filelist.
* If the file already exists and is writable, it is replaced by the
* new tar. It is a create and not an add. If the file exists and is
* read-only or is a directory it is not replaced. The method return
* false and a PEAR error text.
* The $p_filelist parameter can be an array of string, each string
* representing a filename or a directory name with their path if
* needed. It can also be a single string with names separated by a
* single blank.
* The path indicated in $p_remove_dir will be removed from the
* memorized path of each file / directory listed when this path
* exists. By default nothing is removed (empty path '')
* The path indicated in $p_add_dir will be added at the beginning of
* the memorized path of each file / directory listed. However it can
* be set to empty ''. The adding of a path is done after the removing
* of path.
* The path add/remove ability enables the user to prepare an archive
* for extraction in a different path than the origin files are.
* See also addModify() method for file adding properties.
*
* @param array $p_filelist An array of filenames and directory names,
* or a single string with names separated by
* a single blank space.
* @param string $p_add_dir A string which contains a path to be added
* to the memorized path of each element in
* the list.
* @param string $p_remove_dir A string which contains a path to be
* removed from the memorized path of each
* element in the list, when relevant.
*
* @return boolean true on success, false on error.
* @see addModify()
*/
public function createModify($p_filelist, $p_add_dir, $p_remove_dir = '')
{
$v_result = true;
if (!$this->_openWrite()) {
return false;
}
if ($p_filelist != '') {
if (is_array($p_filelist)) {
$v_list = $p_filelist;
} elseif (is_string($p_filelist)) {
$v_list = explode($this->_separator, $p_filelist);
} else {
$this->_cleanFile();
$this->_error('Invalid file list');
return false;
}
$v_result = $this->_addList($v_list, $p_add_dir, $p_remove_dir);
}
if ($v_result) {
$this->_writeFooter();
$this->_close();
} else {
$this->_cleanFile();
}
return $v_result;
}
/**
* This method add the files / directories listed in $p_filelist at the
* end of the existing archive. If the archive does not yet exists it
* is created.
* The $p_filelist parameter can be an array of string, each string
* representing a filename or a directory name with their path if
* needed. It can also be a single string with names separated by a
* single blank.
* The path indicated in $p_remove_dir will be removed from the
* memorized path of each file / directory listed when this path
* exists. By default nothing is removed (empty path '')
* The path indicated in $p_add_dir will be added at the beginning of
* the memorized path of each file / directory listed. However it can
* be set to empty ''. The adding of a path is done after the removing
* of path.
* The path add/remove ability enables the user to prepare an archive
* for extraction in a different path than the origin files are.
* If a file/dir is already in the archive it will only be added at the
* end of the archive. There is no update of the existing archived
* file/dir. However while extracting the archive, the last file will
* replace the first one. This results in a none optimization of the
* archive size.
* If a file/dir does not exist the file/dir is ignored. However an
* error text is send to PEAR error.
* If a file/dir is not readable the file/dir is ignored. However an
* error text is send to PEAR error.
*
* @param array $p_filelist An array of filenames and directory
* names, or a single string with names
* separated by a single blank space.
* @param string $p_add_dir A string which contains a path to be
* added to the memorized path of each
* element in the list.
* @param string $p_remove_dir A string which contains a path to be
* removed from the memorized path of
* each element in the list, when
* relevant.
*
* @return true on success, false on error.
*/
public function addModify($p_filelist, $p_add_dir, $p_remove_dir = '')
{
$v_result = true;
if (!$this->_isArchive()) {
$v_result = $this->createModify(
$p_filelist,
$p_add_dir,
$p_remove_dir
);
} else {
if (is_array($p_filelist)) {
$v_list = $p_filelist;
} elseif (is_string($p_filelist)) {
$v_list = explode($this->_separator, $p_filelist);
} else {
$this->_error('Invalid file list');
return false;
}
$v_result = $this->_append($v_list, $p_add_dir, $p_remove_dir);
}
return $v_result;
}
/**
* This method add a single string as a file at the
* end of the existing archive. If the archive does not yet exists it
* is created.
*
* @param string $p_filename A string which contains the full
* filename path that will be associated
* with the string.
* @param string $p_string The content of the file added in
* the archive.
* @param bool|int $p_datetime A custom date/time (unix timestamp)
* for the file (optional).
* @param array $p_params An array of optional params:
* stamp => the datetime (replaces
* datetime above if it exists)
* mode => the permissions on the
* file (600 by default)
* type => is this a link? See the
* tar specification for details.
* (default = regular file)
* uid => the user ID of the file
* (default = 0 = root)
* gid => the group ID of the file
* (default = 0 = root)
*
* @return true on success, false on error.
*/
public function addString($p_filename, $p_string, $p_datetime = false, $p_params = array())
{
$p_stamp = @$p_params["stamp"] ? $p_params["stamp"] : ($p_datetime ? $p_datetime : time());
$p_mode = @$p_params["mode"] ? $p_params["mode"] : 0600;
$p_type = @$p_params["type"] ? $p_params["type"] : "";
$p_uid = @$p_params["uid"] ? $p_params["uid"] : "";
$p_gid = @$p_params["gid"] ? $p_params["gid"] : "";
$v_result = true;
if (!$this->_isArchive()) {
if (!$this->_openWrite()) {
return false;
}
$this->_close();
}
if (!$this->_openAppend()) {
return false;
}
// Need to check the get back to the temporary file ? ....
$v_result = $this->_addString($p_filename, $p_string, $p_datetime, $p_params);
$this->_writeFooter();
$this->_close();
return $v_result;
}
/**
* This method extract all the content of the archive in the directory
* indicated by $p_path. When relevant the memorized path of the
* files/dir can be modified by removing the $p_remove_path path at the
* beginning of the file/dir path.
* While extracting a file, if the directory path does not exists it is
* created.
* While extracting a file, if the file already exists it is replaced
* without looking for last modification date.
* While extracting a file, if the file already exists and is write
* protected, the extraction is aborted.
* While extracting a file, if a directory with the same name already
* exists, the extraction is aborted.
* While extracting a directory, if a file with the same name already
* exists, the extraction is aborted.
* While extracting a file/directory if the destination directory exist
* and is write protected, or does not exist but can not be created,
* the extraction is aborted.
* If after extraction an extracted file does not show the correct
* stored file size, the extraction is aborted.
* When the extraction is aborted, a PEAR error text is set and false
* is returned. However the result can be a partial extraction that may
* need to be manually cleaned.
*
* @param string $p_path The path of the directory where the
* files/dir need to by extracted.
* @param string $p_remove_path Part of the memorized path that can be
* removed if present at the beginning of
* the file/dir path.
* @param boolean $p_preserve Preserve user/group ownership of files
* @param boolean $p_symlinks Allow symlinks.
*
* @return boolean true on success, false on error.
* @see extractList()
*/
public function extractModify($p_path, $p_remove_path, $p_preserve = false, $p_symlinks = true)
{
$v_result = true;
$v_list_detail = array();
if ($v_result = $this->_openRead()) {
$v_result = $this->_extractList(
$p_path,
$v_list_detail,
"complete",
0,
$p_remove_path,
$p_preserve,
$p_symlinks
);
$this->_close();
}
return $v_result;
}
/**
* This method extract from the archive one file identified by $p_filename.
* The return value is a string with the file content, or NULL on error.
*
* @param string $p_filename The path of the file to extract in a string.
*
* @return a string with the file content or NULL.
*/
public function extractInString($p_filename)
{
if ($this->_openRead()) {
$v_result = $this->_extractInString($p_filename);
$this->_close();
} else {
$v_result = null;
}
return $v_result;
}
/**
* This method extract from the archive only the files indicated in the
* $p_filelist. These files are extracted in the current directory or
* in the directory indicated by the optional $p_path parameter.
* If indicated the $p_remove_path can be used in the same way as it is
* used in extractModify() method.
*
* @param array $p_filelist An array of filenames and directory names,
* or a single string with names separated
* by a single blank space.
* @param string $p_path The path of the directory where the
* files/dir need to by extracted.
* @param string $p_remove_path Part of the memorized path that can be
* removed if present at the beginning of
* the file/dir path.
* @param boolean $p_preserve Preserve user/group ownership of files
* @param boolean $p_symlinks Allow symlinks.
*
* @return true on success, false on error.
* @see extractModify()
*/
public function extractList($p_filelist, $p_path = '', $p_remove_path = '', $p_preserve = false, $p_symlinks = true)
{
$v_result = true;
$v_list_detail = array();
if (is_array($p_filelist)) {
$v_list = $p_filelist;
} elseif (is_string($p_filelist)) {
$v_list = explode($this->_separator, $p_filelist);
} else {
$this->_error('Invalid string list');
return false;
}
if ($v_result = $this->_openRead()) {
$v_result = $this->_extractList(
$p_path,
$v_list_detail,
"partial",
$v_list,
$p_remove_path,
$p_preserve,
$p_symlinks
);
$this->_close();
}
return $v_result;
}
/**
* This method set specific attributes of the archive. It uses a variable
* list of parameters, in the format attribute code + attribute values :
* $arch->setAttribute(ARCHIVE_TAR_ATT_SEPARATOR, ',');
*
* @return true on success, false on error.
*/
public function setAttribute()
{
$v_result = true;
// ----- Get the number of variable list of arguments
if (($v_size = func_num_args()) == 0) {
return true;
}
// ----- Get the arguments
$v_att_list = func_get_args();
// ----- Read the attributes
$i = 0;
while ($i < $v_size) {
// ----- Look for next option
switch ($v_att_list[$i]) {
// ----- Look for options that request a string value
case ARCHIVE_TAR_ATT_SEPARATOR :
// ----- Check the number of parameters
if (($i + 1) >= $v_size) {
$this->_error(
'Invalid number of parameters for '
. 'attribute ARCHIVE_TAR_ATT_SEPARATOR'
);
return false;
}
// ----- Get the value
$this->_separator = $v_att_list[$i + 1];
$i++;
break;
default :
$this->_error('Unknown attribute code ' . $v_att_list[$i] . '');
return false;
}
// ----- Next attribute
$i++;
}
return $v_result;
}
/**
* This method sets the regular expression for ignoring files and directories
* at import, for example:
* $arch->setIgnoreRegexp("#CVS|\.svn#");
*
* @param string $regexp regular expression defining which files or directories to ignore
*/
public function setIgnoreRegexp($regexp)
{
$this->_ignore_regexp = $regexp;
}
/**
* This method sets the regular expression for ignoring all files and directories
* matching the filenames in the array list at import, for example:
* $arch->setIgnoreList(array('CVS', '.svn', 'bin/tool'));
*
* @param array $list a list of file or directory names to ignore
*
* @access public
*/
public function setIgnoreList($list)
{
$list = str_replace(array('#', '.', '^', '$'), array('\#', '\.', '\^', '\$'), $list);
$regexp = '#/' . join('$|/', $list) . '#';
$this->setIgnoreRegexp($regexp);
}
/**
* @param string $p_message
*/
public function _error($p_message)
{
// Drupal change $this->error_object = $this->raiseError($p_message).
throw new Exception($p_message);
}
/**
* @param string $p_message
*/
public function _warning($p_message)
{
// Drupal change $this->error_object = $this->raiseError($p_message).
throw new Exception($p_message);
}
/**
* @param string $p_filename
* @return bool
*/
public function _isArchive($p_filename = null)
{
if ($p_filename == null) {
$p_filename = $this->_tarname;
}
clearstatcache();
return @is_file($p_filename) && !@is_link($p_filename);
}
/**
* @return bool
*/
public function _openWrite()
{
if ($this->_compress_type == 'gz' && function_exists('gzopen')) {
$this->_file = @gzopen($this->_tarname, "wb9");
} else {
if ($this->_compress_type == 'bz2' && function_exists('bzopen')) {
$this->_file = @bzopen($this->_tarname, "w");
} else {
if ($this->_compress_type == 'lzma2' && function_exists('xzopen')) {
$this->_file = @xzopen($this->_tarname, 'w');
} else {
if ($this->_compress_type == 'none') {
$this->_file = @fopen($this->_tarname, "wb");
} else {
$this->_error(
'Unknown or missing compression type ('
. $this->_compress_type . ')'
);
return false;
}
}
}
}
if ($this->_file == 0) {
$this->_error(
'Unable to open in write mode \''
. $this->_tarname . '\''
);
return false;
}
return true;
}
/**
* @return bool
*/
public function _openRead()
{
if (strtolower(substr($this->_tarname, 0, 7)) == 'http://') {
// ----- Look if a local copy need to be done
if ($this->_temp_tarname == '') {
$this->_temp_tarname = uniqid('tar') . '.tmp';
if (!$v_file_from = @fopen($this->_tarname, 'rb')) {
$this->_error(
'Unable to open in read mode \''
. $this->_tarname . '\''
);
$this->_temp_tarname = '';
return false;
}
if (!$v_file_to = @fopen($this->_temp_tarname, 'wb')) {
$this->_error(
'Unable to open in write mode \''
. $this->_temp_tarname . '\''
);
$this->_temp_tarname = '';
return false;
}
while ($v_data = @fread($v_file_from, 1024)) {
@fwrite($v_file_to, $v_data);
}
@fclose($v_file_from);
@fclose($v_file_to);
}
// ----- File to open if the local copy
$v_filename = $this->_temp_tarname;
} else {
// ----- File to open if the normal Tar file
$v_filename = $this->_tarname;
}
if ($this->_compress_type == 'gz' && function_exists('gzopen')) {
$this->_file = @gzopen($v_filename, "rb");
} else {
if ($this->_compress_type == 'bz2' && function_exists('bzopen')) {
$this->_file = @bzopen($v_filename, "r");
} else {
if ($this->_compress_type == 'lzma2' && function_exists('xzopen')) {
$this->_file = @xzopen($v_filename, "r");
} else {
if ($this->_compress_type == 'none') {
$this->_file = @fopen($v_filename, "rb");
} else {
$this->_error(
'Unknown or missing compression type ('
. $this->_compress_type . ')'
);
return false;
}
}
}
}
if ($this->_file == 0) {
$this->_error('Unable to open in read mode \'' . $v_filename . '\'');
return false;
}
return true;
}
/**
* @return bool
*/
public function _openReadWrite()
{
if ($this->_compress_type == 'gz') {
$this->_file = @gzopen($this->_tarname, "r+b");
} else {
if ($this->_compress_type == 'bz2') {
$this->_error(
'Unable to open bz2 in read/write mode \''
. $this->_tarname . '\' (limitation of bz2 extension)'
);
return false;
} else {
if ($this->_compress_type == 'lzma2') {
$this->_error(
'Unable to open lzma2 in read/write mode \''
. $this->_tarname . '\' (limitation of lzma2 extension)'
);
return false;
} else {
if ($this->_compress_type == 'none') {
$this->_file = @fopen($this->_tarname, "r+b");
} else {
$this->_error(
'Unknown or missing compression type ('
. $this->_compress_type . ')'
);
return false;
}
}
}
}
if ($this->_file == 0) {
$this->_error(
'Unable to open in read/write mode \''
. $this->_tarname . '\''
);
return false;
}
return true;
}
/**
* @return bool
*/
public function _close()
{
//if (isset($this->_file)) {
if (is_resource($this->_file)) {
if ($this->_compress_type == 'gz') {
@gzclose($this->_file);
} else {
if ($this->_compress_type == 'bz2') {
@bzclose($this->_file);
} else {
if ($this->_compress_type == 'lzma2') {
@xzclose($this->_file);
} else {
if ($this->_compress_type == 'none') {
@fclose($this->_file);
} else {
$this->_error(
'Unknown or missing compression type ('
. $this->_compress_type . ')'
);
}
}
}
}
$this->_file = 0;
}
// ----- Look if a local copy need to be erase
// Note that it might be interesting to keep the url for a time : ToDo
if ($this->_temp_tarname != '') {
@drupal_unlink($this->_temp_tarname);
$this->_temp_tarname = '';
}
return true;
}
/**
* @return bool
*/
public function _cleanFile()
{
$this->_close();
// ----- Look for a local copy
if ($this->_temp_tarname != '') {
// ----- Remove the local copy but not the remote tarname
@drupal_unlink($this->_temp_tarname);
$this->_temp_tarname = '';
} else {
// ----- Remove the local tarname file
@drupal_unlink($this->_tarname);
}
$this->_tarname = '';
return true;
}
/**
* @param mixed $p_binary_data
* @param integer $p_len
* @return bool
*/
public function _writeBlock($p_binary_data, $p_len = null)
{
if (is_resource($this->_file)) {
if ($p_len === null) {
if ($this->_compress_type == 'gz') {
@gzputs($this->_file, $p_binary_data);
} else {
if ($this->_compress_type == 'bz2') {
@bzwrite($this->_file, $p_binary_data);
} else {
if ($this->_compress_type == 'lzma2') {
@xzwrite($this->_file, $p_binary_data);
} else {
if ($this->_compress_type == 'none') {
@fputs($this->_file, $p_binary_data);
} else {
$this->_error(
'Unknown or missing compression type ('
. $this->_compress_type . ')'
);
}
}
}
}
} else {
if ($this->_compress_type == 'gz') {
@gzputs($this->_file, $p_binary_data, $p_len);
} else {
if ($this->_compress_type == 'bz2') {
@bzwrite($this->_file, $p_binary_data, $p_len);
} else {
if ($this->_compress_type == 'lzma2') {
@xzwrite($this->_file, $p_binary_data, $p_len);
} else {
if ($this->_compress_type == 'none') {
@fputs($this->_file, $p_binary_data, $p_len);
} else {
$this->_error(
'Unknown or missing compression type ('
. $this->_compress_type . ')'
);
}
}
}
}
}
}
return true;
}
/**
* @return null|string
*/
public function _readBlock()
{
$v_block = null;
if (is_resource($this->_file)) {
if ($this->_compress_type == 'gz') {
$v_block = @gzread($this->_file, 512);
} else {
if ($this->_compress_type == 'bz2') {
$v_block = @bzread($this->_file, 512);
} else {
if ($this->_compress_type == 'lzma2') {
$v_block = @xzread($this->_file, 512);
} else {
if ($this->_compress_type == 'none') {
$v_block = @fread($this->_file, 512);
} else {
$this->_error(
'Unknown or missing compression type ('
. $this->_compress_type . ')'
);
}
}
}
}
}
return $v_block;
}
/**
* @param null $p_len
* @return bool
*/
public function _jumpBlock($p_len = null)
{
if (is_resource($this->_file)) {
if ($p_len === null) {
$p_len = 1;
}
if ($this->_compress_type == 'gz') {
@gzseek($this->_file, gztell($this->_file) + ($p_len * 512));
} else {
if ($this->_compress_type == 'bz2') {
// ----- Replace missing bztell() and bzseek()
for ($i = 0; $i < $p_len; $i++) {
$this->_readBlock();
}
} else {
if ($this->_compress_type == 'lzma2') {
// ----- Replace missing xztell() and xzseek()
for ($i = 0; $i < $p_len; $i++) {
$this->_readBlock();
}
} else {
if ($this->_compress_type == 'none') {
@fseek($this->_file, $p_len * 512, SEEK_CUR);
} else {
$this->_error(
'Unknown or missing compression type ('
. $this->_compress_type . ')'
);
}
}
}
}
}
return true;
}
/**
* @return bool
*/
public function _writeFooter()
{
if (is_resource($this->_file)) {
// ----- Write the last 0 filled block for end of archive
$v_binary_data = pack('a1024', '');
$this->_writeBlock($v_binary_data);
}
return true;
}
/**
* @param array $p_list
* @param string $p_add_dir
* @param string $p_remove_dir
* @return bool
*/
public function _addList($p_list, $p_add_dir, $p_remove_dir)
{
$v_result = true;
$v_header = array();
// ----- Remove potential windows directory separator
$p_add_dir = $this->_translateWinPath($p_add_dir);
$p_remove_dir = $this->_translateWinPath($p_remove_dir, false);
if (!$this->_file) {
$this->_error('Invalid file descriptor');
return false;
}
if (sizeof($p_list) == 0) {
return true;
}
foreach ($p_list as $v_filename) {
if (!$v_result) {
break;
}
// ----- Skip the current tar name
if ($v_filename == $this->_tarname) {
continue;
}
if ($v_filename == '') {
continue;
}
// ----- ignore files and directories matching the ignore regular expression
if ($this->_ignore_regexp && preg_match($this->_ignore_regexp, '/' . $v_filename)) {
$this->_warning("File '$v_filename' ignored");
continue;
}
if (!file_exists($v_filename) && !is_link($v_filename)) {
$this->_warning("File '$v_filename' does not exist");
continue;
}
// ----- Add the file or directory header
if (!$this->_addFile($v_filename, $v_header, $p_add_dir, $p_remove_dir)) {
return false;
}
if (@is_dir($v_filename) && !@is_link($v_filename)) {
if (!($p_hdir = opendir($v_filename))) {
$this->_warning("Directory '$v_filename' can not be read");
continue;
}
while (false !== ($p_hitem = readdir($p_hdir))) {
if (($p_hitem != '.') && ($p_hitem != '..')) {
if ($v_filename != ".") {
$p_temp_list[0] = $v_filename . '/' . $p_hitem;
} else {
$p_temp_list[0] = $p_hitem;
}
$v_result = $this->_addList(
$p_temp_list,
$p_add_dir,
$p_remove_dir
);
}
}
unset($p_temp_list);
unset($p_hdir);
unset($p_hitem);
}
}
return $v_result;
}
/**
* @param string $p_filename
* @param mixed $p_header
* @param string $p_add_dir
* @param string $p_remove_dir
* @param null $v_stored_filename
* @return bool
*/
public function _addFile($p_filename, &$p_header, $p_add_dir, $p_remove_dir, $v_stored_filename = null)
{
if (!$this->_file) {
$this->_error('Invalid file descriptor');
return false;
}
if ($p_filename == '') {
$this->_error('Invalid file name');
return false;
}
if (is_null($v_stored_filename)) {
// ----- Calculate the stored filename
$p_filename = $this->_translateWinPath($p_filename, false);
$v_stored_filename = $p_filename;
if (strcmp($p_filename, $p_remove_dir) == 0) {
return true;
}
if ($p_remove_dir != '') {
if (substr($p_remove_dir, -1) != '/') {
$p_remove_dir .= '/';
}
if (substr($p_filename, 0, strlen($p_remove_dir)) == $p_remove_dir) {
$v_stored_filename = substr($p_filename, strlen($p_remove_dir));
}
}
$v_stored_filename = $this->_translateWinPath($v_stored_filename);
if ($p_add_dir != '') {
if (substr($p_add_dir, -1) == '/') {
$v_stored_filename = $p_add_dir . $v_stored_filename;
} else {
$v_stored_filename = $p_add_dir . '/' . $v_stored_filename;
}
}
$v_stored_filename = $this->_pathReduction($v_stored_filename);
}
if ($this->_isArchive($p_filename)) {
if (($v_file = @fopen($p_filename, "rb")) == 0) {
$this->_warning(
"Unable to open file '" . $p_filename
. "' in binary read mode"
);
return true;
}
if (!$this->_writeHeader($p_filename, $v_stored_filename)) {
return false;
}
while (($v_buffer = fread($v_file, $this->buffer_length)) != '') {
$buffer_length = strlen("$v_buffer");
if ($buffer_length != $this->buffer_length) {
$pack_size = ((int)($buffer_length / 512) + ($buffer_length % 512 !== 0 ? 1 : 0)) * 512;
$pack_format = sprintf('a%d', $pack_size);
} else {
$pack_format = sprintf('a%d', $this->buffer_length);
}
$v_binary_data = pack($pack_format, "$v_buffer");
$this->_writeBlock($v_binary_data);
}
fclose($v_file);
} else {
// ----- Only header for dir
if (!$this->_writeHeader($p_filename, $v_stored_filename)) {
return false;
}
}
return true;
}
/**
* @param string $p_filename
* @param string $p_string
* @param bool $p_datetime
* @param array $p_params
* @return bool
*/
public function _addString($p_filename, $p_string, $p_datetime = false, $p_params = array())
{
$p_stamp = @$p_params["stamp"] ? $p_params["stamp"] : ($p_datetime ? $p_datetime : time());
$p_mode = @$p_params["mode"] ? $p_params["mode"] : 0600;
$p_type = @$p_params["type"] ? $p_params["type"] : "";
$p_uid = @$p_params["uid"] ? $p_params["uid"] : 0;
$p_gid = @$p_params["gid"] ? $p_params["gid"] : 0;
if (!$this->_file) {
$this->_error('Invalid file descriptor');
return false;
}
if ($p_filename == '') {
$this->_error('Invalid file name');
return false;
}
// ----- Calculate the stored filename
$p_filename = $this->_translateWinPath($p_filename, false);
// ----- If datetime is not specified, set current time
if ($p_datetime === false) {
$p_datetime = time();
}
if (!$this->_writeHeaderBlock(
$p_filename,
strlen($p_string),
$p_stamp,
$p_mode,
$p_type,
$p_uid,
$p_gid
)
) {
return false;
}
$i = 0;
while (($v_buffer = substr($p_string, (($i++) * 512), 512)) != '') {
$v_binary_data = pack("a512", $v_buffer);
$this->_writeBlock($v_binary_data);
}
return true;
}
/**
* @param string $p_filename
* @param string $p_stored_filename
* @return bool
*/
public function _writeHeader($p_filename, $p_stored_filename)
{
if ($p_stored_filename == '') {
$p_stored_filename = $p_filename;
}
$v_reduced_filename = $this->_pathReduction($p_stored_filename);
if (strlen($v_reduced_filename) > 99) {
if (!$this->_writeLongHeader($v_reduced_filename, false)) {
return false;
}
}
$v_linkname = '';
if (@is_link($p_filename)) {
$v_linkname = readlink($p_filename);
}
if (strlen($v_linkname) > 99) {
if (!$this->_writeLongHeader($v_linkname, true)) {
return false;
}
}
$v_info = lstat($p_filename);
$v_uid = sprintf("%07s", DecOct($v_info[4]));
$v_gid = sprintf("%07s", DecOct($v_info[5]));
$v_perms = sprintf("%07s", DecOct($v_info['mode'] & 000777));
$v_mtime = sprintf("%011s", DecOct($v_info['mtime']));
if (@is_link($p_filename)) {
$v_typeflag = '2';
$v_size = sprintf("%011s", DecOct(0));
} elseif (@is_dir($p_filename)) {
$v_typeflag = "5";
$v_size = sprintf("%011s", DecOct(0));
} else {
$v_typeflag = '0';
clearstatcache();
$v_size = sprintf("%011s", DecOct($v_info['size']));
}
$v_magic = 'ustar ';
$v_version = ' ';
$v_uname = '';
$v_gname = '';
if (function_exists('posix_getpwuid')) {
$userinfo = posix_getpwuid($v_info[4]);
$groupinfo = posix_getgrgid($v_info[5]);
if (isset($userinfo['name'])) {
$v_uname = $userinfo['name'];
}
if (isset($groupinfo['name'])) {
$v_gname = $groupinfo['name'];
}
}
$v_devmajor = '';
$v_devminor = '';
$v_prefix = '';
$v_binary_data_first = pack(
"a100a8a8a8a12a12",
$v_reduced_filename,
$v_perms,
$v_uid,
$v_gid,
$v_size,
$v_mtime
);
$v_binary_data_last = pack(
"a1a100a6a2a32a32a8a8a155a12",
$v_typeflag,
$v_linkname,
$v_magic,
$v_version,
$v_uname,
$v_gname,
$v_devmajor,
$v_devminor,
$v_prefix,
''
);
// ----- Calculate the checksum
$v_checksum = 0;
// ..... First part of the header
for ($i = 0; $i < 148; $i++) {
$v_checksum += ord(substr($v_binary_data_first, $i, 1));
}
// ..... Ignore the checksum value and replace it by ' ' (space)
for ($i = 148; $i < 156; $i++) {
$v_checksum += ord(' ');
}
// ..... Last part of the header
for ($i = 156, $j = 0; $i < 512; $i++, $j++) {
$v_checksum += ord(substr($v_binary_data_last, $j, 1));
}
// ----- Write the first 148 bytes of the header in the archive
$this->_writeBlock($v_binary_data_first, 148);
// ----- Write the calculated checksum
$v_checksum = sprintf("%06s\0 ", DecOct($v_checksum));
$v_binary_data = pack("a8", $v_checksum);
$this->_writeBlock($v_binary_data, 8);
// ----- Write the last 356 bytes of the header in the archive
$this->_writeBlock($v_binary_data_last, 356);
return true;
}
/**
* @param string $p_filename
* @param int $p_size
* @param int $p_mtime
* @param int $p_perms
* @param string $p_type
* @param int $p_uid
* @param int $p_gid
* @return bool
*/
public function _writeHeaderBlock(
$p_filename,
$p_size,
$p_mtime = 0,
$p_perms = 0,
$p_type = '',
$p_uid = 0,
$p_gid = 0
)
{
$p_filename = $this->_pathReduction($p_filename);
if (strlen($p_filename) > 99) {
if (!$this->_writeLongHeader($p_filename, false)) {
return false;
}
}
if ($p_type == "5") {
$v_size = sprintf("%011s", DecOct(0));
} else {
$v_size = sprintf("%011s", DecOct($p_size));
}
$v_uid = sprintf("%07s", DecOct($p_uid));
$v_gid = sprintf("%07s", DecOct($p_gid));
$v_perms = sprintf("%07s", DecOct($p_perms & 000777));
$v_mtime = sprintf("%11s", DecOct($p_mtime));
$v_linkname = '';
$v_magic = 'ustar ';
$v_version = ' ';
if (function_exists('posix_getpwuid')) {
$userinfo = posix_getpwuid($p_uid);
$groupinfo = posix_getgrgid($p_gid);
if ($userinfo === false || $groupinfo === false) {
$v_uname = '';
$v_gname = '';
} else {
$v_uname = $userinfo['name'];
$v_gname = $groupinfo['name'];
}
} else {
$v_uname = '';
$v_gname = '';
}
$v_devmajor = '';
$v_devminor = '';
$v_prefix = '';
$v_binary_data_first = pack(
"a100a8a8a8a12A12",
$p_filename,
$v_perms,
$v_uid,
$v_gid,
$v_size,
$v_mtime
);
$v_binary_data_last = pack(
"a1a100a6a2a32a32a8a8a155a12",
$p_type,
$v_linkname,
$v_magic,
$v_version,
$v_uname,
$v_gname,
$v_devmajor,
$v_devminor,
$v_prefix,
''
);
// ----- Calculate the checksum
$v_checksum = 0;
// ..... First part of the header
for ($i = 0; $i < 148; $i++) {
$v_checksum += ord(substr($v_binary_data_first, $i, 1));
}
// ..... Ignore the checksum value and replace it by ' ' (space)
for ($i = 148; $i < 156; $i++) {
$v_checksum += ord(' ');
}
// ..... Last part of the header
for ($i = 156, $j = 0; $i < 512; $i++, $j++) {
$v_checksum += ord(substr($v_binary_data_last, $j, 1));
}
// ----- Write the first 148 bytes of the header in the archive
$this->_writeBlock($v_binary_data_first, 148);
// ----- Write the calculated checksum
$v_checksum = sprintf("%06s ", DecOct($v_checksum));
$v_binary_data = pack("a8", $v_checksum);
$this->_writeBlock($v_binary_data, 8);
// ----- Write the last 356 bytes of the header in the archive
$this->_writeBlock($v_binary_data_last, 356);
return true;
}
/**
* @param string $p_filename
* @return bool
*/
public function _writeLongHeader($p_filename, $is_link = false)
{
$v_uid = sprintf("%07s", 0);
$v_gid = sprintf("%07s", 0);
$v_perms = sprintf("%07s", 0);
$v_size = sprintf("%'011s", DecOct(strlen($p_filename)));
$v_mtime = sprintf("%011s", 0);
$v_typeflag = ($is_link ? 'K' : 'L');
$v_linkname = '';
$v_magic = 'ustar ';
$v_version = ' ';
$v_uname = '';
$v_gname = '';
$v_devmajor = '';
$v_devminor = '';
$v_prefix = '';
$v_binary_data_first = pack(
"a100a8a8a8a12a12",
'././@LongLink',
$v_perms,
$v_uid,
$v_gid,
$v_size,
$v_mtime
);
$v_binary_data_last = pack(
"a1a100a6a2a32a32a8a8a155a12",
$v_typeflag,
$v_linkname,
$v_magic,
$v_version,
$v_uname,
$v_gname,
$v_devmajor,
$v_devminor,
$v_prefix,
''
);
// ----- Calculate the checksum
$v_checksum = 0;
// ..... First part of the header
for ($i = 0; $i < 148; $i++) {
$v_checksum += ord(substr($v_binary_data_first, $i, 1));
}
// ..... Ignore the checksum value and replace it by ' ' (space)
for ($i = 148; $i < 156; $i++) {
$v_checksum += ord(' ');
}
// ..... Last part of the header
for ($i = 156, $j = 0; $i < 512; $i++, $j++) {
$v_checksum += ord(substr($v_binary_data_last, $j, 1));
}
// ----- Write the first 148 bytes of the header in the archive
$this->_writeBlock($v_binary_data_first, 148);
// ----- Write the calculated checksum
$v_checksum = sprintf("%06s\0 ", DecOct($v_checksum));
$v_binary_data = pack("a8", $v_checksum);
$this->_writeBlock($v_binary_data, 8);
// ----- Write the last 356 bytes of the header in the archive
$this->_writeBlock($v_binary_data_last, 356);
// ----- Write the filename as content of the block
$i = 0;
while (($v_buffer = substr($p_filename, (($i++) * 512), 512)) != '') {
$v_binary_data = pack("a512", "$v_buffer");
$this->_writeBlock($v_binary_data);
}
return true;
}
/**
* @param mixed $v_binary_data
* @param mixed $v_header
* @return bool
*/
public function _readHeader($v_binary_data, &$v_header)
{
if (strlen($v_binary_data) == 0) {
$v_header['filename'] = '';
return true;
}
if (strlen($v_binary_data) != 512) {
$v_header['filename'] = '';
$this->_error('Invalid block size : ' . strlen($v_binary_data));
return false;
}
if (!is_array($v_header)) {
$v_header = array();
}
// ----- Calculate the checksum
$v_checksum = 0;
// ..... First part of the header
$v_binary_split = str_split($v_binary_data);
$v_checksum += array_sum(array_map('ord', array_slice($v_binary_split, 0, 148)));
$v_checksum += array_sum(array_map('ord', array(' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ',)));
$v_checksum += array_sum(array_map('ord', array_slice($v_binary_split, 156, 512)));
$v_data = unpack($this->_fmt, $v_binary_data);
if (strlen($v_data["prefix"]) > 0) {
$v_data["filename"] = "$v_data[prefix]/$v_data[filename]";
}
// ----- Extract the checksum
$v_data_checksum = trim($v_data['checksum']);
if (!preg_match('/^[0-7]*$/', $v_data_checksum)) {
$this->_error(
'Invalid checksum for file "' . $v_data['filename']
. '" : ' . $v_data_checksum . ' extracted'
);
return false;
}
$v_header['checksum'] = OctDec($v_data_checksum);
if ($v_header['checksum'] != $v_checksum) {
$v_header['filename'] = '';
// ----- Look for last block (empty block)
if (($v_checksum == 256) && ($v_header['checksum'] == 0)) {
return true;
}
$this->_error(
'Invalid checksum for file "' . $v_data['filename']
. '" : ' . $v_checksum . ' calculated, '
. $v_header['checksum'] . ' expected'
);
return false;
}
// ----- Extract the properties
$v_header['filename'] = rtrim($v_data['filename'], "\0");
if ($this->_isMaliciousFilename($v_header['filename'])) {
$this->_error(
'Malicious .tar detected, file "' . $v_header['filename'] .
'" will not install in desired directory tree'
);
return false;
}
$v_header['mode'] = OctDec(trim($v_data['mode']));
$v_header['uid'] = OctDec(trim($v_data['uid']));
$v_header['gid'] = OctDec(trim($v_data['gid']));
$v_header['size'] = $this->_tarRecToSize($v_data['size']);
$v_header['mtime'] = OctDec(trim($v_data['mtime']));
if (($v_header['typeflag'] = $v_data['typeflag']) == "5") {
$v_header['size'] = 0;
}
$v_header['link'] = trim($v_data['link']);
/* ----- All these fields are removed form the header because
they do not carry interesting info
$v_header[magic] = trim($v_data[magic]);
$v_header[version] = trim($v_data[version]);
$v_header[uname] = trim($v_data[uname]);
$v_header[gname] = trim($v_data[gname]);
$v_header[devmajor] = trim($v_data[devmajor]);
$v_header[devminor] = trim($v_data[devminor]);
*/
return true;
}
/**
* Convert Tar record size to actual size
*
* @param string $tar_size
* @return size of tar record in bytes
*/
private function _tarRecToSize($tar_size)
{
/*
* First byte of size has a special meaning if bit 7 is set.
*
* Bit 7 indicates base-256 encoding if set.
* Bit 6 is the sign bit.
* Bits 5:0 are most significant value bits.
*/
$ch = ord($tar_size[0]);
if ($ch & 0x80) {
// Full 12-bytes record is required.
$rec_str = $tar_size . "\x00";
$size = ($ch & 0x40) ? -1 : 0;
$size = ($size << 6) | ($ch & 0x3f);
for ($num_ch = 1; $num_ch < 12; ++$num_ch) {
$size = ($size * 256) + ord($rec_str[$num_ch]);
}
return $size;
} else {
return OctDec(trim($tar_size));
}
}
/**
* Detect and report a malicious file name
*
* @param string $file
*
* @return bool
*/
private function _isMaliciousFilename($file)
{
if (strpos($file, '://') !== false) {
return true;
}
if (strpos($file, '../') !== false || strpos($file, '..\\') !== false) {
return true;
}
return false;
}
/**
* @param $v_header
* @return bool
*/
public function _readLongHeader(&$v_header)
{
$v_filename = '';
$v_filesize = $v_header['size'];
$n = floor($v_header['size'] / 512);
for ($i = 0; $i < $n; $i++) {
$v_content = $this->_readBlock();
$v_filename .= $v_content;
}
if (($v_header['size'] % 512) != 0) {
$v_content = $this->_readBlock();
$v_filename .= $v_content;
}
// ----- Read the next header
$v_binary_data = $this->_readBlock();
if (!$this->_readHeader($v_binary_data, $v_header)) {
return false;
}
$v_filename = rtrim(substr($v_filename, 0, $v_filesize), "\0");
$v_header['filename'] = $v_filename;
if ($this->_isMaliciousFilename($v_filename)) {
$this->_error(
'Malicious .tar detected, file "' . $v_filename .
'" will not install in desired directory tree'
);
return false;
}
return true;
}
/**
* This method extract from the archive one file identified by $p_filename.
* The return value is a string with the file content, or null on error.
*
* @param string $p_filename The path of the file to extract in a string.
*
* @return a string with the file content or null.
*/
private function _extractInString($p_filename)
{
$v_result_str = "";
while (strlen($v_binary_data = $this->_readBlock()) != 0) {
if (!$this->_readHeader($v_binary_data, $v_header)) {
return null;
}
if ($v_header['filename'] == '') {
continue;
}
switch ($v_header['typeflag']) {
case 'L':
{
if (!$this->_readLongHeader($v_header)) {
return null;
}
}
break;
case 'K':
{
$v_link_header = $v_header;
if (!$this->_readLongHeader($v_link_header)) {
return null;
}
$v_header['link'] = $v_link_header['filename'];
}
break;
}
if ($v_header['filename'] == $p_filename) {
if ($v_header['typeflag'] == "5") {
$this->_error(
'Unable to extract in string a directory '
. 'entry {' . $v_header['filename'] . '}'
);
return null;
} else {
$n = floor($v_header['size'] / 512);
for ($i = 0; $i < $n; $i++) {
$v_result_str .= $this->_readBlock();
}
if (($v_header['size'] % 512) != 0) {
$v_content = $this->_readBlock();
$v_result_str .= substr(
$v_content,
0,
($v_header['size'] % 512)
);
}
return $v_result_str;
}
} else {
$this->_jumpBlock(ceil(($v_header['size'] / 512)));
}
}
return null;
}
/**
* @param string $p_path
* @param string $p_list_detail
* @param string $p_mode
* @param string $p_file_list
* @param string $p_remove_path
* @param bool $p_preserve
* @param bool $p_symlinks
* @return bool
*/
public function _extractList(
$p_path,
&$p_list_detail,
$p_mode,
$p_file_list,
$p_remove_path,
$p_preserve = false,
$p_symlinks = true
)
{
$v_result = true;
$v_nb = 0;
$v_extract_all = true;
$v_listing = false;
$p_path = $this->_translateWinPath($p_path, false);
if ($p_path == '' || (substr($p_path, 0, 1) != '/'
&& substr($p_path, 0, 3) != "../" && !strpos($p_path, ':'))
) {
$p_path = "./" . $p_path;
}
$p_remove_path = $this->_translateWinPath($p_remove_path);
// ----- Look for path to remove format (should end by /)
if (($p_remove_path != '') && (substr($p_remove_path, -1) != '/')) {
$p_remove_path .= '/';
}
$p_remove_path_size = strlen($p_remove_path);
switch ($p_mode) {
case "complete" :
$v_extract_all = true;
$v_listing = false;
break;
case "partial" :
$v_extract_all = false;
$v_listing = false;
break;
case "list" :
$v_extract_all = false;
$v_listing = true;
break;
default :
$this->_error('Invalid extract mode (' . $p_mode . ')');
return false;
}
clearstatcache();
while (strlen($v_binary_data = $this->_readBlock()) != 0) {
$v_extract_file = false;
$v_extraction_stopped = 0;
if (!$this->_readHeader($v_binary_data, $v_header)) {
return false;
}
if ($v_header['filename'] == '') {
continue;
}
switch ($v_header['typeflag']) {
case 'L':
{
if (!$this->_readLongHeader($v_header)) {
return null;
}
}
break;
case 'K':
{
$v_link_header = $v_header;
if (!$this->_readLongHeader($v_link_header)) {
return null;
}
$v_header['link'] = $v_link_header['filename'];
}
break;
}
// ignore extended / pax headers
if ($v_header['typeflag'] == 'x' || $v_header['typeflag'] == 'g') {
$this->_jumpBlock(ceil(($v_header['size'] / 512)));
continue;
}
if ((!$v_extract_all) && (is_array($p_file_list))) {
// ----- By default no unzip if the file is not found
$v_extract_file = false;
for ($i = 0; $i < sizeof($p_file_list); $i++) {
// ----- Look if it is a directory
if (substr($p_file_list[$i], -1) == '/') {
// ----- Look if the directory is in the filename path
if ((strlen($v_header['filename']) > strlen($p_file_list[$i]))
&& (substr($v_header['filename'], 0, strlen($p_file_list[$i]))
== $p_file_list[$i])
) {
$v_extract_file = true;
break;
}
} // ----- It is a file, so compare the file names
elseif ($p_file_list[$i] == $v_header['filename']) {
$v_extract_file = true;
break;
}
}
} else {
$v_extract_file = true;
}
// ----- Look if this file need to be extracted
if (($v_extract_file) && (!$v_listing)) {
if (($p_remove_path != '')
&& (substr($v_header['filename'] . '/', 0, $p_remove_path_size)
== $p_remove_path)
) {
$v_header['filename'] = substr(
$v_header['filename'],
$p_remove_path_size
);
if ($v_header['filename'] == '') {
continue;
}
}
if (($p_path != './') && ($p_path != '/')) {
while (substr($p_path, -1) == '/') {
$p_path = substr($p_path, 0, strlen($p_path) - 1);
}
if (substr($v_header['filename'], 0, 1) == '/') {
$v_header['filename'] = $p_path . $v_header['filename'];
} else {
$v_header['filename'] = $p_path . '/' . $v_header['filename'];
}
}
if (file_exists($v_header['filename'])) {
if ((@is_dir($v_header['filename']))
&& ($v_header['typeflag'] == '')
) {
$this->_error(
'File ' . $v_header['filename']
. ' already exists as a directory'
);
return false;
}
if (($this->_isArchive($v_header['filename']))
&& ($v_header['typeflag'] == "5")
) {
$this->_error(
'Directory ' . $v_header['filename']
. ' already exists as a file'
);
return false;
}
if (!is_writeable($v_header['filename'])) {
$this->_error(
'File ' . $v_header['filename']
. ' already exists and is write protected'
);
return false;
}
if (filemtime($v_header['filename']) > $v_header['mtime']) {
// To be completed : An error or silent no replace ?
}
} // ----- Check the directory availability and create it if necessary
elseif (($v_result
= $this->_dirCheck(
($v_header['typeflag'] == "5"
? $v_header['filename']
: dirname($v_header['filename']))
)) != 1
) {
$this->_error('Unable to create path for ' . $v_header['filename']);
return false;
}
if ($v_extract_file) {
if ($v_header['typeflag'] == "5") {
if (!@file_exists($v_header['filename'])) {
if (!@mkdir($v_header['filename'], 0777)) {
$this->_error(
'Unable to create directory {'
. $v_header['filename'] . '}'
);
return false;
}
}
} elseif ($v_header['typeflag'] == "2") {
if (!$p_symlinks) {
$this->_warning('Symbolic links are not allowed. '
. 'Unable to extract {'
. $v_header['filename'] . '}'
);
return false;
}
$absolute_link = FALSE;
$link_depth = 0;
if (strpos($v_header['link'], "/") === 0 || strpos($v_header['link'], ':') !== FALSE) {
$absolute_link = TRUE;
}
else {
$s_filename = preg_replace('@^' . preg_quote($p_path) . '@', "", $v_header['filename']);
$s_linkname = str_replace('\\', '/', $v_header['link']);
foreach (explode("/", $s_filename) as $dir) {
if ($dir === "..") {
$link_depth--;
} elseif ($dir !== "" && $dir !== "." ) {
$link_depth++;
}
}
foreach (explode("/", $s_linkname) as $dir){
if ($link_depth <= 0) {
break;
}
if ($dir === "..") {
$link_depth--;
} elseif ($dir !== "" && $dir !== ".") {
$link_depth++;
}
}
}
if ($absolute_link || $link_depth <= 0) {
$this->_error(
'Out-of-path file extraction {'
. $v_header['filename'] . ' --> ' .
$v_header['link'] . '}'
);
return false;
}
if (@file_exists($v_header['filename'])) {
@drupal_unlink($v_header['filename']);
}
if (!@symlink($v_header['link'], $v_header['filename'])) {
$this->_error(
'Unable to extract symbolic link {'
. $v_header['filename'] . '}'
);
return false;
}
} else {
if (($v_dest_file = @fopen($v_header['filename'], "wb")) == 0) {
$this->_error(
'Error while opening {' . $v_header['filename']
. '} in write binary mode'
);
return false;
} else {
$n = floor($v_header['size'] / 512);
for ($i = 0; $i < $n; $i++) {
$v_content = $this->_readBlock();
fwrite($v_dest_file, $v_content, 512);
}
if (($v_header['size'] % 512) != 0) {
$v_content = $this->_readBlock();
fwrite($v_dest_file, $v_content, ($v_header['size'] % 512));
}
@fclose($v_dest_file);
if ($p_preserve) {
@chown($v_header['filename'], $v_header['uid']);
@chgrp($v_header['filename'], $v_header['gid']);
}
// ----- Change the file mode, mtime
@touch($v_header['filename'], $v_header['mtime']);
if ($v_header['mode'] & 0111) {
// make file executable, obey umask
$mode = fileperms($v_header['filename']) | (~umask() & 0111);
@chmod($v_header['filename'], $mode);
}
}
// ----- Check the file size
clearstatcache();
if (!is_file($v_header['filename'])) {
$this->_error(
'Extracted file ' . $v_header['filename']
. 'does not exist. Archive may be corrupted.'
);
return false;
}
$filesize = filesize($v_header['filename']);
if ($filesize != $v_header['size']) {
$this->_error(
'Extracted file ' . $v_header['filename']
. ' does not have the correct file size \''
. $filesize
. '\' (' . $v_header['size']
. ' expected). Archive may be corrupted.'
);
return false;
}
}
} else {
$this->_jumpBlock(ceil(($v_header['size'] / 512)));
}
} else {
$this->_jumpBlock(ceil(($v_header['size'] / 512)));
}
/* TBC : Seems to be unused ...
if ($this->_compress)
$v_end_of_file = @gzeof($this->_file);
else
$v_end_of_file = @feof($this->_file);
*/
if ($v_listing || $v_extract_file || $v_extraction_stopped) {
// ----- Log extracted files
if (($v_file_dir = dirname($v_header['filename']))
== $v_header['filename']
) {
$v_file_dir = '';
}
if ((substr($v_header['filename'], 0, 1) == '/') && ($v_file_dir == '')) {
$v_file_dir = '/';
}
$p_list_detail[$v_nb++] = $v_header;
if (is_array($p_file_list) && (count($p_list_detail) == count($p_file_list))) {
return true;
}
}
}
return true;
}
/**
* @return bool
*/
public function _openAppend()
{
if (filesize($this->_tarname) == 0) {
return $this->_openWrite();
}
if ($this->_compress) {
$this->_close();
if (!@rename($this->_tarname, $this->_tarname . ".tmp")) {
$this->_error(
'Error while renaming \'' . $this->_tarname
. '\' to temporary file \'' . $this->_tarname
. '.tmp\''
);
return false;
}
if ($this->_compress_type == 'gz') {
$v_temp_tar = @gzopen($this->_tarname . ".tmp", "rb");
} elseif ($this->_compress_type == 'bz2') {
$v_temp_tar = @bzopen($this->_tarname . ".tmp", "r");
} elseif ($this->_compress_type == 'lzma2') {
$v_temp_tar = @xzopen($this->_tarname . ".tmp", "r");
}
if ($v_temp_tar == 0) {
$this->_error(
'Unable to open file \'' . $this->_tarname
. '.tmp\' in binary read mode'
);
@rename($this->_tarname . ".tmp", $this->_tarname);
return false;
}
if (!$this->_openWrite()) {
@rename($this->_tarname . ".tmp", $this->_tarname);
return false;
}
if ($this->_compress_type == 'gz') {
$end_blocks = 0;
while (!@gzeof($v_temp_tar)) {
$v_buffer = @gzread($v_temp_tar, 512);
if ($v_buffer == ARCHIVE_TAR_END_BLOCK || strlen($v_buffer) == 0) {
$end_blocks++;
// do not copy end blocks, we will re-make them
// after appending
continue;
} elseif ($end_blocks > 0) {
for ($i = 0; $i < $end_blocks; $i++) {
$this->_writeBlock(ARCHIVE_TAR_END_BLOCK);
}
$end_blocks = 0;
}
$v_binary_data = pack("a512", $v_buffer);
$this->_writeBlock($v_binary_data);
}
@gzclose($v_temp_tar);
} elseif ($this->_compress_type == 'bz2') {
$end_blocks = 0;
while (strlen($v_buffer = @bzread($v_temp_tar, 512)) > 0) {
if ($v_buffer == ARCHIVE_TAR_END_BLOCK || strlen($v_buffer) == 0) {
$end_blocks++;
// do not copy end blocks, we will re-make them
// after appending
continue;
} elseif ($end_blocks > 0) {
for ($i = 0; $i < $end_blocks; $i++) {
$this->_writeBlock(ARCHIVE_TAR_END_BLOCK);
}
$end_blocks = 0;
}
$v_binary_data = pack("a512", $v_buffer);
$this->_writeBlock($v_binary_data);
}
@bzclose($v_temp_tar);
} elseif ($this->_compress_type == 'lzma2') {
$end_blocks = 0;
while (strlen($v_buffer = @xzread($v_temp_tar, 512)) > 0) {
if ($v_buffer == ARCHIVE_TAR_END_BLOCK || strlen($v_buffer) == 0) {
$end_blocks++;
// do not copy end blocks, we will re-make them
// after appending
continue;
} elseif ($end_blocks > 0) {
for ($i = 0; $i < $end_blocks; $i++) {
$this->_writeBlock(ARCHIVE_TAR_END_BLOCK);
}
$end_blocks = 0;
}
$v_binary_data = pack("a512", $v_buffer);
$this->_writeBlock($v_binary_data);
}
@xzclose($v_temp_tar);
}
if (!@drupal_unlink($this->_tarname . ".tmp")) {
$this->_error(
'Error while deleting temporary file \''
. $this->_tarname . '.tmp\''
);
}
} else {
// ----- For not compressed tar, just add files before the last
// one or two 512 bytes block
if (!$this->_openReadWrite()) {
return false;
}
clearstatcache();
$v_size = filesize($this->_tarname);
// We might have zero, one or two end blocks.
// The standard is two, but we should try to handle
// other cases.
fseek($this->_file, $v_size - 1024);
if (fread($this->_file, 512) == ARCHIVE_TAR_END_BLOCK) {
fseek($this->_file, $v_size - 1024);
} elseif (fread($this->_file, 512) == ARCHIVE_TAR_END_BLOCK) {
fseek($this->_file, $v_size - 512);
}
}
return true;
}
/**
* @param $p_filelist
* @param string $p_add_dir
* @param string $p_remove_dir
* @return bool
*/
public function _append($p_filelist, $p_add_dir = '', $p_remove_dir = '')
{
if (!$this->_openAppend()) {
return false;
}
if ($this->_addList($p_filelist, $p_add_dir, $p_remove_dir)) {
$this->_writeFooter();
}
$this->_close();
return true;
}
/**
* Check if a directory exists and create it (including parent
* dirs) if not.
*
* @param string $p_dir directory to check
*
* @return bool true if the directory exists or was created
*/
public function _dirCheck($p_dir)
{
clearstatcache();
if ((@is_dir($p_dir)) || ($p_dir == '')) {
return true;
}
$p_parent_dir = dirname($p_dir);
if (($p_parent_dir != $p_dir) &&
($p_parent_dir != '') &&
(!$this->_dirCheck($p_parent_dir))
) {
return false;
}
if (!@mkdir($p_dir, 0777)) {
$this->_error("Unable to create directory '$p_dir'");
return false;
}
return true;
}
/**
* Compress path by changing for example "/dir/foo/../bar" to "/dir/bar",
* rand emove double slashes.
*
* @param string $p_dir path to reduce
*
* @return string reduced path
*/
private function _pathReduction($p_dir)
{
$v_result = '';
// ----- Look for not empty path
if ($p_dir != '') {
// ----- Explode path by directory names
$v_list = explode('/', $p_dir);
// ----- Study directories from last to first
for ($i = sizeof($v_list) - 1; $i >= 0; $i--) {
// ----- Look for current path
if ($v_list[$i] == ".") {
// ----- Ignore this directory
// Should be the first $i=0, but no check is done
} else {
if ($v_list[$i] == "..") {
// ----- Ignore it and ignore the $i-1
$i--;
} else {
if (($v_list[$i] == '')
&& ($i != (sizeof($v_list) - 1))
&& ($i != 0)
) {
// ----- Ignore only the double '//' in path,
// but not the first and last /
} else {
$v_result = $v_list[$i] . ($i != (sizeof($v_list) - 1) ? '/'
. $v_result : '');
}
}
}
}
}
if (defined('OS_WINDOWS') && OS_WINDOWS) {
$v_result = strtr($v_result, '\\', '/');
}
return $v_result;
}
/**
* @param $p_path
* @param bool $p_remove_disk_letter
* @return string
*/
public function _translateWinPath($p_path, $p_remove_disk_letter = true)
{
if (defined('OS_WINDOWS') && OS_WINDOWS) {
// ----- Look for potential disk letter
if (($p_remove_disk_letter)
&& (($v_position = strpos($p_path, ':')) != false)
) {
$p_path = substr($p_path, $v_position + 1);
}
// ----- Change potential windows directory separator
if ((strpos($p_path, '\\') > 0) || (substr($p_path, 0, 1) == '\\')) {
$p_path = strtr($p_path, '\\', '/');
}
}
return $p_path;
}
}
Reference in a new issue Copy permalink