Code Forge

<?php

/**

*

* @package phpBB3

* @version $Id$

* @copyright (c) 2005 phpBB Group

* @license http://opensource.org/licenses/gpl-license.php GNU Public License

*

*/

/**

* @ignore

*/

if (!defined('IN_PHPBB'))

{

        exit;

}

/**

* Class for handling archives (compression/decompression)

* @package phpBB3

*/

class compress

{

        var $fp = 0;

        /**

        * Add file to archive

        */

        function add_file($src, $src_rm_prefix = '', $src_add_prefix = '', $skip_files = '')

        {

                global $phpbb_root_path;

                $skip_files = explode(',', $skip_files);

                // Remove rm prefix from src path

                $src_path = ($src_rm_prefix) ? preg_replace('#^(' . preg_quote($src_rm_prefix, '#') . ')#', '', $src) : $src;

                // Add src prefix

                $src_path = ($src_add_prefix) ? ($src_add_prefix . ((substr($src_add_prefix, -1) != '/') ? '/' : '') . $src_path) : $src_path;

                // Remove initial "/" if present

                $src_path = (substr($src_path, 0, 1) == '/') ? substr($src_path, 1) : $src_path;

                if (is_file($phpbb_root_path . $src))

                {

                        $this->data($src_path, file_get_contents("$phpbb_root_path$src"), false, stat("$phpbb_root_path$src"));

                }

                else if (is_dir($phpbb_root_path . $src))

                {

                        // Clean up path, add closing / if not present

                        $src_path = ($src_path && substr($src_path, -1) != '/') ? $src_path . '/' : $src_path;

                        $filelist = array();

                        $filelist = filelist("$phpbb_root_path$src", '', '*');

                        krsort($filelist);

                        /**

                        * Commented out, as adding the folders produces corrupted archives

                        if ($src_path)

                        {

                                $this->data($src_path, '', true, stat("$phpbb_root_path$src"));

                        }

                        */

                        foreach ($filelist as $path => $file_ary)

                        {

                                /**

                                * Commented out, as adding the folders produces corrupted archives

                                if ($path)

                                {

                                        // Same as for src_path

                                        $path = (substr($path, 0, 1) == '/') ? substr($path, 1) : $path;

                                        $path = ($path && substr($path, -1) != '/') ? $path . '/' : $path;

                                        $this->data("$src_path$path", '', true, stat("$phpbb_root_path$src$path"));

                                }

                                */

                                foreach ($file_ary as $file)

                                {

                                        if (in_array($path . $file, $skip_files))

                                        {

                                                continue;

                                        }

                                        $this->data("$src_path$path$file", file_get_contents("$phpbb_root_path$src$path$file"), false, stat("$phpbb_root_path$src$path$file"));

                                }

                        }

                }

                else

                {

                        // $src does not exist

                        return false;

                }

                return true;

        }

        /**

        * Add custom file (the filepath will not be adjusted)

        */

        function add_custom_file($src, $filename)

        {

                if (!file_exists($src))

                {

                        return false;

                }

                $this->data($filename, file_get_contents($src), false, stat($src));

                return true;

        }

        /**

        * Add file data

        */

        function add_data($src, $name)

        {

                $stat = array();

                $stat[2] = 436; //384

                $stat[4] = $stat[5] = 0;

                $stat[7] = strlen($src);

                $stat[9] = time();

                $this->data($name, $src, false, $stat);

                return true;

        }

        /**

        * Return available methods

        */

        function methods()

        {

                $methods = array('.tar');

                $available_methods = array('.tar.gz' => 'zlib', '.tar.bz2' => 'bz2', '.zip' => 'zlib');

                foreach ($available_methods as $type => $module)

                {

                        if (!@extension_loaded($module))

                        {

                                continue;

                        }

                        $methods[] = $type;

                }

                return $methods;

        }

}

/**

* Zip creation class from phpMyAdmin 2.3.0 (c) Tobias Ratschiller, Olivier Müller, Loïc Chapeaux,

* Marc Delisle, http://www.phpmyadmin.net/

*

* Zip extraction function by Alexandre Tedeschi, alexandrebr at gmail dot com

*

* Modified extensively by psoTFX and DavidMJ, (c) phpBB Group, 2003

*

* Based on work by Eric Mueller and Denis125

* Official ZIP file format: http://www.pkware.com/appnote.txt

*

* @package phpBB3

*/

class compress_zip extends compress

{

        var $datasec = array();

        var $ctrl_dir = array();

        var $eof_cdh = "\x50\x4b\x05\x06\x00\x00\x00\x00";

        var $old_offset = 0;

        var $datasec_len = 0;

        /**

        * Constructor

        */

        function compress_zip($mode, $file)

        {

                $this->fp = @fopen($file, $mode . 'b');

                if (!$this->fp)

                {

                        trigger_error('Unable to open file ' . $file . ' [' . $mode . 'b]');

                }

        }

        /**

        * Convert unix to dos time

        */

        function unix_to_dos_time($time)

        {

                $timearray = (!$time) ? getdate() : getdate($time);

                if ($timearray['year'] < 1980)

                {

                        $timearray['year'] = 1980;

                        $timearray['mon'] = $timearray['mday'] = 1;

                        $timearray['hours'] = $timearray['minutes'] = $timearray['seconds'] = 0;

                }

                return (($timearray['year'] - 1980) << 25) | ($timearray['mon'] << 21) | ($timearray['mday'] << 16) | ($timearray['hours'] << 11) | ($timearray['minutes'] << 5) | ($timearray['seconds'] >> 1);

        }

        /**

        * Extract archive

        */

        function extract($dst)

        {

                // Loop the file, looking for files and folders

                $dd_try = false;

                rewind($this->fp);

                while (!feof($this->fp))

                {

                        // Check if the signature is valid...

                        $signature = fread($this->fp, 4);

                        switch ($signature)

                        {

                                // 'Local File Header'

                                case "\x50\x4b\x03\x04":

                                        // Lets get everything we need.

                                        // We don't store the version needed to extract, the general purpose bit flag or the date and time fields

                                        $data = unpack("@4/vc_method/@10/Vcrc/Vc_size/Vuc_size/vname_len/vextra_field", fread($this->fp, 26));

                                        $file_name = fread($this->fp, $data['name_len']); // filename

                                        if ($data['extra_field'])

                                        {

                                                fread($this->fp, $data['extra_field']); // extra field

                                        }

                                        $target_filename = "$dst$file_name";

                                        if (!$data['uc_size'] && !$data['crc'] && substr($file_name, -1, 1) == '/')

                                        {

                                                if (!is_dir($target_filename))

                                                {

                                                        $str = '';

                                                        $folders = explode('/', $target_filename);

                                                        // Create and folders and subfolders if they do not exist

                                                        foreach ($folders as $folder)

                                                        {

                                                                $folder = trim($folder);

                                                                if (!$folder)

                                                                {

                                                                        continue;

                                                                }

                                                                $str = (!empty($str)) ? $str . '/' . $folder : $folder;

                                                                if (!is_dir($str))

                                                                {

                                                                        if (!@mkdir($str, 0777))

                                                                        {

                                                                                trigger_error("Could not create directory $folder");

                                                                        }

                                                                        phpbb_chmod($str, CHMOD_READ | CHMOD_WRITE);

                                                                }

                                                        }

                                                }

                                                // This is a directory, we are not writting files

                                                continue;

                                        }

                                        else

                                        {

                                                // Some archivers are punks, they don't include folders in their archives!

                                                $str = '';

                                                $folders = explode('/', pathinfo($target_filename, PATHINFO_DIRNAME));

                                                // Create and folders and subfolders if they do not exist

                                                foreach ($folders as $folder)

                                                {

                                                        $folder = trim($folder);

                                                        if (!$folder)

                                                        {

                                                                continue;

                                                        }

                                                        $str = (!empty($str)) ? $str . '/' . $folder : $folder;

                                                        if (!is_dir($str))

                                                        {

                                                                if (!@mkdir($str, 0777))

                                                                {

                                                                        trigger_error("Could not create directory $folder");

                                                                }

                                                                phpbb_chmod($str, CHMOD_READ | CHMOD_WRITE);

                                                        }

                                                }

                                        }

                                        if (!$data['uc_size'])

                                        {

                                                $content = '';

                                        }

                                        else

                                        {

                                                $content = fread($this->fp, $data['c_size']);

                                        }

                                        $fp = fopen($target_filename, "w");

                                        switch ($data['c_method'])

                                        {

                                                case 0:

                                                        // Not compressed

                                                        fwrite($fp, $content);

                                                break;

                                                case 8:

                                                        // Deflate

                                                        fwrite($fp, gzinflate($content, $data['uc_size']));

                                                break;

                                                case 12:

                                                        // Bzip2

                                                        fwrite($fp, bzdecompress($content));

                                                break;

                                        }

                                        fclose($fp);

                                break;

                                // We hit the 'Central Directory Header', we can stop because nothing else in here requires our attention

                                // or we hit the end of the central directory record, we can safely end the loop as we are totally finished with looking for files and folders

                                case "\x50\x4b\x01\x02":

                                // This case should simply never happen.. but it does exist..

                                case "\x50\x4b\x05\x06":

                                break 2;

                                // 'Packed to Removable Disk', ignore it and look for the next signature...

                                case 'PK00':

                                continue 2;

                                // We have encountered a header that is weird. Lets look for better data...

                                default:

                                        if (!$dd_try)

                                        {

                                                // Unexpected header. Trying to detect wrong placed 'Data Descriptor';

                                                $dd_try = true;

                                                fseek($this->fp, 8, SEEK_CUR); // Jump over 'crc-32'(4) 'compressed-size'(4), 'uncompressed-size'(4)

                                                continue 2;

                                        }

                                        trigger_error("Unexpected header, ending loop");

                                break 2;

                        }

                        $dd_try = false;

                }

        }

        /**

        * Close archive

        */

        function close()

        {

                // Write out central file directory and footer ... if it exists

                if (sizeof($this->ctrl_dir))

                {

                        fwrite($this->fp, $this->file());

                }

                fclose($this->fp);

        }

        /**

        * Create the structures ... note we assume version made by is MSDOS

        */

        function data($name, $data, $is_dir = false, $stat)

        {

                $name = str_replace('\\', '/', $name);

                $hexdtime = pack('V', $this->unix_to_dos_time($stat[9]));

                if ($is_dir)

                {

                        $unc_len = $c_len = $crc = 0;

                        $zdata = '';

                        $var_ext = 10;

                }

                else

                {

                        $unc_len = strlen($data);

                        $crc = crc32($data);

                        $zdata = gzdeflate($data);

                        $c_len = strlen($zdata);

                        $var_ext = 20;

                        // Did we compress? No, then use data as is

                        if ($c_len >= $unc_len)

                        {

                                $zdata = $data;

                                $c_len = $unc_len;

                                $var_ext = 10;

                        }

                }

                unset($data);

                // If we didn't compress set method to store, else deflate

                $c_method = ($c_len == $unc_len) ? "\x00\x00" : "\x08\x00";

                // Are we a file or a directory? Set archive for file

                $attrib = ($is_dir) ? 16 : 32;

                // File Record Header

                $fr = "\x50\x4b\x03\x04";                // Local file header 4bytes

                $fr .= pack('v', $var_ext);                // ver needed to extract 2bytes

                $fr .= "\x00\x00";                                // gen purpose bit flag 2bytes

                $fr .= $c_method;                                // compression method 2bytes

                $fr .= $hexdtime;                                // last mod time and date 2+2bytes

                $fr .= pack('V', $crc);                        // crc32 4bytes

                $fr .= pack('V', $c_len);                // compressed filesize 4bytes

                $fr .= pack('V', $unc_len);                // uncompressed filesize 4bytes

                $fr .= pack('v', strlen($name));// length of filename 2bytes

                $fr .= pack('v', 0);                        // extra field length 2bytes

                $fr .= $name;

                $fr .= $zdata;

                unset($zdata);

                $this->datasec_len += strlen($fr);

                // Add data to file ... by writing data out incrementally we save some memory

                fwrite($this->fp, $fr);

                unset($fr);

                // Central Directory Header

                $cdrec = "\x50\x4b\x01\x02";                // header 4bytes

                $cdrec .= "\x00\x00";                                // version made by

                $cdrec .= pack('v', $var_ext);                // version needed to extract

                $cdrec .= "\x00\x00";                                // gen purpose bit flag

                $cdrec .= $c_method;                                // compression method

                $cdrec .= $hexdtime;                                // last mod time & date

                $cdrec .= pack('V', $crc);                        // crc32

                $cdrec .= pack('V', $c_len);                // compressed filesize

                $cdrec .= pack('V', $unc_len);                // uncompressed filesize

                $cdrec .= pack('v', strlen($name));        // length of filename

                $cdrec .= pack('v', 0);                                // extra field length

                $cdrec .= pack('v', 0);                                // file comment length

                $cdrec .= pack('v', 0);                                // disk number start

                $cdrec .= pack('v', 0);                                // internal file attributes

                $cdrec .= pack('V', $attrib);                // external file attributes

                $cdrec .= pack('V', $this->old_offset);        // relative offset of local header

                $cdrec .= $name;

                // Save to central directory

                $this->ctrl_dir[] = $cdrec;

                $this->old_offset = $this->datasec_len;

        }

        /**

        * file

        */

        function file()

        {

                $ctrldir = implode('', $this->ctrl_dir);

                return $ctrldir . $this->eof_cdh .

                        pack('v', sizeof($this->ctrl_dir)) .        // total # of entries "on this disk"

                        pack('v', sizeof($this->ctrl_dir)) .        // total # of entries overall

                        pack('V', strlen($ctrldir)) .                        // size of central dir

                        pack('V', $this->datasec_len) .                        // offset to start of central dir

                        "\x00\x00";                                                                // .zip file comment length

        }

        /**

        * Download archive

        */

        function download($filename, $download_name = false)

        {

                global $phpbb_root_path;

                if ($download_name === false)

                {

                        $download_name = $filename;

                }

                $mimetype = 'application/zip';

                header('Pragma: no-cache');

                header("Content-Type: $mimetype; name=\"$download_name.zip\"");

                header("Content-disposition: attachment; filename=$download_name.zip");

                $fp = @fopen("{$phpbb_root_path}store/$filename.zip", 'rb');

                if ($fp)

                {

                        while ($buffer = fread($fp, 1024))

                        {

                                echo $buffer;

                        }

                        fclose($fp);

                }

        }

}

/**

* Tar/tar.gz compression routine

* Header/checksum creation derived from tarfile.pl, (c) Tom Horsley, 1994

*

* @package phpBB3

*/

class compress_tar extends compress

{

        var $isgz = false;

        var $isbz = false;

        var $filename = '';

        var $mode = '';

        var $type = '';

        var $wrote = false;

        /**

        * Constructor

        */

        function compress_tar($mode, $file, $type = '')

        {

                $type = (!$type) ? $file : $type;

                $this->isgz = preg_match('#(\.tar\.gz|\.tgz)$#', $type);

                $this->isbz = preg_match('#\.tar\.bz2$#', $type);

                $this->mode = &$mode;

                $this->file = &$file;

                $this->type = &$type;

                $this->open();

        }

        /**

        * Extract archive

        */

        function extract($dst)

        {

                $fzread = ($this->isbz && function_exists('bzread')) ? 'bzread' : (($this->isgz && @extension_loaded('zlib')) ? 'gzread' : 'fread');

                // Run through the file and grab directory entries

                while ($buffer = $fzread($this->fp, 512))

                {

                        $tmp = unpack('A6magic', substr($buffer, 257, 6));

                        if (trim($tmp['magic']) == 'ustar')

                        {

                                $tmp = unpack('A100name', $buffer);

                                $filename = trim($tmp['name']);

                                $tmp = unpack('Atype', substr($buffer, 156, 1));

                                $filetype = (int) trim($tmp['type']);

                                $tmp = unpack('A12size', substr($buffer, 124, 12));

                                $filesize = octdec((int) trim($tmp['size']));

                                $target_filename = "$dst$filename";

                                if ($filetype == 5)

                                {

                                        if (!is_dir($target_filename))

                                        {

                                                $str = '';

                                                $folders = explode('/', $target_filename);

                                                // Create and folders and subfolders if they do not exist

                                                foreach ($folders as $folder)

                                                {

                                                        $folder = trim($folder);

                                                        if (!$folder)

                                                        {

                                                                continue;

                                                        }

                                                        $str = (!empty($str)) ? $str . '/' . $folder : $folder;

                                                        if (!is_dir($str))

                                                        {

                                                                if (!@mkdir($str, 0777))

                                                                {

                                                                        trigger_error("Could not create directory $folder");

                                                                }

                                                                phpbb_chmod($str, CHMOD_READ | CHMOD_WRITE);

                                                        }

                                                }

                                        }

                                }

                                else if ($filesize >= 0 && ($filetype == 0 || $filetype == "\0"))

                                {

                                        // Some archivers are punks, they don't properly order the folders in their archives!

                                        $str = '';

                                        $folders = explode('/', pathinfo($target_filename, PATHINFO_DIRNAME));

                                        // Create and folders and subfolders if they do not exist

                                        foreach ($folders as $folder)

                                        {

                                                $folder = trim($folder);

                                                if (!$folder)

                                                {

                                                        continue;

                                                }

                                                $str = (!empty($str)) ? $str . '/' . $folder : $folder;

                                                if (!is_dir($str))

                                                {

                                                        if (!@mkdir($str, 0777))

                                                        {

                                                                trigger_error("Could not create directory $folder");

                                                        }

                                                        phpbb_chmod($str, CHMOD_READ | CHMOD_WRITE);

                                                }

                                        }

                                        // Write out the files

                                        if (!($fp = fopen($target_filename, 'wb')))

                                        {

                                                trigger_error("Couldn't create file $filename");

                                        }

                                        phpbb_chmod($target_filename, CHMOD_READ);

                                        // Grab the file contents

                                        fwrite($fp, ($filesize) ? $fzread($this->fp, ($filesize + 511) &~ 511) : '', $filesize);

                                        fclose($fp);

                                }

                        }

                }

        }

        /**

        * Close archive

        */

        function close()

        {

                $fzclose = ($this->isbz && function_exists('bzclose')) ? 'bzclose' : (($this->isgz && @extension_loaded('zlib')) ? 'gzclose' : 'fclose');

                if ($this->wrote)

                {

                        $fzwrite = ($this->isbz && function_exists('bzwrite')) ? 'bzwrite' : (($this->isgz && @extension_loaded('zlib')) ? 'gzwrite' : 'fwrite');

                        // The end of a tar archive ends in two records of all NULLs (1024 bytes of \0)

                        $fzwrite($this->fp, str_repeat("\0", 1024));

                }

                $fzclose($this->fp);

        }

        /**

        * Create the structures

        */

        function data($name, $data, $is_dir = false, $stat)

        {

                $this->wrote = true;

                $fzwrite =         ($this->isbz && function_exists('bzwrite')) ? 'bzwrite' : (($this->isgz && @extension_loaded('zlib')) ? 'gzwrite' : 'fwrite');

                $typeflag = ($is_dir) ? '5' : '';

                // This is the header data, it contains all the info we know about the file or folder that we are about to archive

                $header = '';

                $header .= pack('a100', $name);                                                // file name

                $header .= pack('a8', sprintf("%07o", $stat[2]));        // file mode

                $header .= pack('a8', sprintf("%07o", $stat[4]));        // owner id

                $header .= pack('a8', sprintf("%07o", $stat[5]));        // group id

                $header .= pack('a12', sprintf("%011o", $stat[7]));        // file size

                $header .= pack('a12', sprintf("%011o", $stat[9]));        // last mod time

                // Checksum

                $checksum = 0;

                for ($i = 0; $i < 148; $i++)

                {

                        $checksum += ord($header[$i]);

                }

                // We precompute the rest of the hash, this saves us time in the loop and allows us to insert our hash without resorting to string functions

                $checksum += 2415 + (($is_dir) ? 53 : 0);

                $header .= pack('a8', sprintf("%07o", $checksum));        // checksum

                $header .= pack('a1', $typeflag);                                        // link indicator

                $header .= pack('a100', '');                                                // name of linked file

                $header .= pack('a6', 'ustar');                                                // ustar indicator

                $header .= pack('a2', '00');                                                // ustar version

                $header .= pack('a32', 'Unknown');                                        // owner name

                $header .= pack('a32', 'Unknown');                                        // group name

                $header .= pack('a8', '');                                                        // device major number

                $header .= pack('a8', '');                                                        // device minor number

                $header .= pack('a155', '');                                                // filename prefix

                $header .= pack('a12', '');                                                        // end

                // This writes the entire file in one shot. Header, followed by data and then null padded to a multiple of 512

                $fzwrite($this->fp, $header . (($stat[7] !== 0 && !$is_dir) ? $data . str_repeat("\0", (($stat[7] + 511) &~ 511) - $stat[7]) : ''));

                unset($data);

        }

        /**

        * Open archive

        */

        function open()

        {

                $fzopen = ($this->isbz && function_exists('bzopen')) ? 'bzopen' : (($this->isgz && @extension_loaded('zlib')) ? 'gzopen' : 'fopen');

                $this->fp = @$fzopen($this->file, $this->mode . (($fzopen == 'bzopen') ? '' : 'b') . (($fzopen == 'gzopen') ? '9' : ''));

                if (!$this->fp)

                {

                        trigger_error('Unable to open file ' . $this->file . ' [' . $fzopen . ' - ' . $this->mode . 'b]');

                }

        }

        /**

        * Download archive

        */

        function download($filename, $download_name = false)

        {

                global $phpbb_root_path;

                if ($download_name === false)

                {

                        $download_name = $filename;

                }

                switch ($this->type)

                {

                        case '.tar':

                                $mimetype = 'application/x-tar';

                        break;

                        case '.tar.gz':

                                $mimetype = 'application/x-gzip';

                        break;

                        case '.tar.bz2':

                                $mimetype = 'application/x-bzip2';

                        break;

                        default:

                                $mimetype = 'application/octet-stream';

                        break;

                }

                header('Pragma: no-cache');

                header("Content-Type: $mimetype; name=\"$download_name$this->type\"");

                header("Content-disposition: attachment; filename=$download_name$this->type");

                $fp = @fopen("{$phpbb_root_path}store/$filename$this->type", 'rb');

                if ($fp)

                {

                        while ($buffer = fread($fp, 1024))

                        {

                                echo $buffer;