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✏️ Editing: elFinderVolumeSFTPphpseclib.class.php

<?php

/**
 * Simple elFinder driver for SFTP using phpseclib 1
 *
 * @author Dmitry (dio) Levashov
 * @author Cem (discofever), sitecode
 * @reference http://phpseclib.sourceforge.net/sftp/2.0/examples.html
 **/
class elFinderVolumeSFTPphpseclib extends elFinderVolumeFTP {

/**
     * Constructor
     * Extend options with required fields
     *
     * @author Dmitry (dio) Levashov
     * @author Cem (DiscoFever)
     */
    public function __construct()
    {
        $opts = array(
            'host' => 'localhost',
            'user' => '',
            'pass' => '',
            'port' => 22,
            'path' => '/',
            'timeout' => 20,
            'owner' => true,
            'tmbPath' => '',
            'tmpPath' => '',
            'separator' => '/',
            'phpseclibDir' => '../phpseclib/',
            'connectCallback' => null, //provide your own already instantiated phpseclib $Sftp object returned by this callback
                                       //'connectCallback'=> function($options) {
                                       //     //load and instantiate phpseclib $sftp
                                       //     return $sftp;
                                       // },
            'checkSubfolders' => -1,
            'dirMode' => 0755,
            'fileMode' => 0644,
            'rootCssClass' => 'elfinder-navbar-root-ftp',
        );
        $this->options = array_merge($this->options, $opts);
        $this->options['mimeDetect'] = 'internal';
    }

/**
     * Prepare
     * Call from elFinder::netmout() before volume->mount()
     *
     * @param $options
     *
     * @return array volume root options
     * @author Naoki Sawada
     */
    public function netmountPrepare($options)
    {
        $options['statOwner'] = true;
        $options['allowChmodReadOnly'] = true;
        $options['acceptedName'] = '#^[^/\\?*:|"<>]*[^./\\?*:|"<>]$#';
        return $options;
    }

/*********************************************************************/
    /*                        INIT AND CONFIGURE                         */
    /*********************************************************************/

/**
     * Prepare SFTP connection
     * Connect to remote server and check if credentials are correct, if so, store the connection
     *
     * @return bool
     * @author Dmitry (dio) Levashov
     * @author Cem (DiscoFever)
     **/
    protected function init()
    {
        if (!$this->options['connectCallback']) {
            if (!$this->options['host']
                || !$this->options['port']) {
                return $this->setError('Required options undefined.');
            }

if (!$this->options['path']) {
                $this->options['path'] = '/';
            }

// make net mount key
            $this->netMountKey = md5(join('-', array('sftpphpseclib', $this->options['host'], $this->options['port'], $this->options['path'], $this->options['user'])));

set_include_path(get_include_path() . PATH_SEPARATOR . getcwd().'/'.$this->options['phpseclibDir']);
            include_once('Net/SFTP.php');

if (!class_exists('Net_SFTP')) {
                return $this->setError('SFTP extension not loaded. Install phpseclib version 1: http://phpseclib.sourceforge.net/ Set option "phpseclibDir" accordingly.');
            }

// remove protocol from host
            $scheme = parse_url($this->options['host'], PHP_URL_SCHEME);

if ($scheme) {
                $this->options['host'] = substr($this->options['host'], strlen($scheme) + 3);
            }
        } else {
            // make net mount key
            $this->netMountKey = md5(join('-', array('sftpphpseclib', $this->options['path'])));
        }

// normalize root path
        $this->root = $this->options['path'] = $this->_normpath($this->options['path']);

if (empty($this->options['alias'])) {
            $this->options['alias'] = $this->options['user'] . '@' . $this->options['host'];
            if (!empty($this->options['netkey'])) {
                elFinder::$instance->updateNetVolumeOption($this->options['netkey'], 'alias', $this->options['alias']);
            }
        }

$this->rootName = $this->options['alias'];
        $this->options['separator'] = '/';

if (is_null($this->options['syncChkAsTs'])) {
            $this->options['syncChkAsTs'] = true;
        }

return $this->needOnline? $this->connect() : true;

}

/**
     * Configure after successfull mount.
     *
     * @return void
     * @throws elFinderAbortException
     * @author Dmitry (dio) Levashov
     */
    protected function configure()
    {
        parent::configure();

if (!$this->tmp) {
            $this->disabled[] = 'mkfile';
            $this->disabled[] = 'paste';
            $this->disabled[] = 'upload';
            $this->disabled[] = 'edit';
            //$this->disabled[] = 'archive';
            //$this->disabled[] = 'extract';
        }

$this->disabled[] = 'archive';
        $this->disabled[] = 'extract';
    }

/**
     * Connect to sftp server
     *
     * @return bool
     * @author sitecode
     **/
    protected function connect()
    {
        //use ca
        if ($this->options['connectCallback']) {
            $this->connect = $this->options['connectCallback']($this->options);
            if (!$this->connect || !$this->connect->isConnected()) {
                return $this->setError('Unable to connect successfully');
            }

return true;
        }

try{
            $host = $this->options['host'] . ($this->options['port'] != 22 ? ':' . $this->options['port'] : '');
            $this->connect = new Net_SFTP($host);
            //TODO check fingerprint before login, fail if no match to last time
            if (!$this->connect->login($this->options['user'], $this->options['pass'])) {
                return $this->setError('Unable to connect to SFTP server ' . $host);
            }
        } catch (Exception $e) {
            return $this->setError('Error while connecting to SFTP server '  . $host . ': ' . $e->getMessage());
        }

if (!$this->connect->chdir($this->root)
            /*|| $this->root != $this->connect->pwd()*/) {
            //$this->umount();
            return $this->setError('Unable to open root folder.');
        }

return true;
    }

/**
     * Call rawlist
     *
     * @param string $path
     *
     * @return array
     */
    protected function ftpRawList($path)
    {
        return $this->connect->rawlist($path ?: '.') ?: [];
    }

/*********************************************************************/
    /*                               FS API                              */
    /*********************************************************************/

/**
     * Close opened connection
     *
     * @return void
     * @author Dmitry (dio) Levashov
     **/
    public function umount()
    {
        $this->connect && $this->connect->disconnect();
    }

/**
     * Parse line from rawlist() output and return file stat (array)
     *
     * @param array $info from rawlist() output
     * @param         $base
     * @param bool    $nameOnly
     *
     * @return array
     * @author Dmitry Levashov
     */
    protected function parseRaw($info, $base, $nameOnly = false)
    {
        $stat = array();

if ($info['filename'] == '.' || $info['filename'] == '..') {
            return false;
        }

$name = $info['filename'];

if ($info['type'] === 3) {
            // check recursive processing
            if ($this->cacheDirTarget && $this->_joinPath($base, $name) !== $this->cacheDirTarget) {
                return array();
            }
            if (!$nameOnly) {
                $target = $this->connect->readlink($name);
                if (substr($target, 0, 1) !== $this->separator) {
                    $target = $this->getFullPath($target, $base);
                }
                $target = $this->_normpath($target);
                $stat['name'] = $name;
                $stat['target'] = $target;
                return $stat;
            }
        }

if ($nameOnly) {
            return array('name' => $name);
        }

$stat['ts'] = $info['mtime'];

if ($this->options['statOwner']) {
            $stat['owner'] = $info['uid'];
            $stat['group'] = $info['gid'];
            $stat['perm'] = $info['permissions'];
            $stat['isowner'] = isset($stat['owner']) ? ($this->options['owner'] ? true : ($stat['owner'] == $this->options['user'])) : true;
        }

$owner_computed = isset($stat['isowner']) ? $stat['isowner'] : $this->options['owner'];
        $perm = $this->parsePermissions($info['permissions'], $owner_computed);
        $stat['name'] = $name;
        if ($info['type'] === NET_SFTP_TYPE_DIRECTORY) {
            $stat['mime'] = 'directory';
            $stat['size'] = 0;

} elseif ($info['type'] === NET_SFTP_TYPE_SYMLINK) {
            $stat['mime'] = 'symlink';
            $stat['size'] = 0;

} else {
            $stat['mime'] = $this->mimetype($stat['name'], true);
            $stat['size'] = $info['size'];
        }

$stat['read'] = $perm['read'];
        $stat['write'] = $perm['write'];

return $stat;
    }

/**
     * Parse permissions string. Return array(read => true/false, write => true/false)
     *
     * @param  int $perm
     *                                             The isowner parameter is computed by the caller.
     *                                             If the owner parameter in the options is true, the user is the actual owner of all objects even if the user used in the ftp Login
     *                                             is different from the file owner id.
     *                                             If the owner parameter is false to understand if the user is the file owner we compare the ftp user with the file owner id.
     * @param Boolean $isowner                     . Tell if the current user is the owner of the object.
     *
     * @return array
     * @author Dmitry (dio) Levashov
     * @author sitecode
     */
    protected function parsePermissions($permissions, $isowner = true)
    {
        $permissions = decoct($permissions);
        $perm = $isowner ? decbin($permissions[-3]) : decbin($permissions[-1]);

return array(
            'read' => $perm[-3],
            'write' => $perm[-2]
        );
    }

/**
     * Cache dir contents
     *
     * @param  string $path dir path
     *
     * @return void
     * @author Dmitry Levashov, sitecode
     **/
    protected function cacheDir($path)
    {
        $this->dirsCache[$path] = array();
        $hasDir = false;

$list = array();
        $encPath = $this->convEncIn($path);
        foreach ($this->ftpRawList($encPath) as $info) {
            if (($stat = $this->parseRaw($info, $encPath))) {
                $list[] = $stat;
            }
        }
        $list = $this->convEncOut($list);
        $prefix = ($path === $this->separator) ? $this->separator : $path . $this->separator;
        $targets = array();
        foreach ($list as $stat) {
            $p = $prefix . $stat['name'];
            if (isset($stat['target'])) {
                // stat later
                $targets[$stat['name']] = $stat['target'];
            } else {
                $stat = $this->updateCache($p, $stat);
                if (empty($stat['hidden'])) {
                    if (!$hasDir && $stat['mime'] === 'directory') {
                        $hasDir = true;
                    } elseif (!$hasDir && $stat['mime'] === 'symlink') {
                        $hasDir = true;
                    }
                    $this->dirsCache[$path][] = $p;
                }
            }
        }
        // stat link targets
        foreach ($targets as $name => $target) {
            $stat = array();
            $stat['name'] = $name;
            $p = $prefix . $name;
            $cacheDirTarget = $this->cacheDirTarget;
            $this->cacheDirTarget = $this->convEncIn($target, true);
            if ($tstat = $this->stat($target)) {
                $stat['size'] = $tstat['size'];
                $stat['alias'] = $target;
                $stat['thash'] = $tstat['hash'];
                $stat['mime'] = $tstat['mime'];
                $stat['read'] = $tstat['read'];
                $stat['write'] = $tstat['write'];

if (isset($tstat['ts'])) {
                    $stat['ts'] = $tstat['ts'];
                }
                if (isset($tstat['owner'])) {
                    $stat['owner'] = $tstat['owner'];
                }
                if (isset($tstat['group'])) {
                    $stat['group'] = $tstat['group'];
                }
                if (isset($tstat['perm'])) {
                    $stat['perm'] = $tstat['perm'];
                }
                if (isset($tstat['isowner'])) {
                    $stat['isowner'] = $tstat['isowner'];
                }
            } else {

$stat['mime'] = 'symlink-broken';
                $stat['read'] = false;
                $stat['write'] = false;
                $stat['size'] = 0;

}
            $this->cacheDirTarget = $cacheDirTarget;
            $stat = $this->updateCache($p, $stat);
            if (empty($stat['hidden'])) {
                if (!$hasDir && $stat['mime'] === 'directory') {
                    $hasDir = true;
                }
                $this->dirsCache[$path][] = $p;
            }
        }

if (isset($this->sessionCache['subdirs'])) {
            $this->sessionCache['subdirs'][$path] = $hasDir;
        }
    }

/***************** file stat ********************/

/**
     * Return stat for given path.
     * Stat contains following fields:
     * - (int)    size    file size in b. required
     * - (int)    ts      file modification time in unix time. required
     * - (string) mime    mimetype. required for folders, others - optionally
     * - (bool)   read    read permissions. required
     * - (bool)   write   write permissions. required
     * - (bool)   locked  is object locked. optionally
     * - (bool)   hidden  is object hidden. optionally
     * - (string) alias   for symlinks - link target path relative to root path. optionally
     * - (string) target  for symlinks - link target path. optionally
     * If file does not exists - returns empty array or false.
     *
     * @param  string $path file path
     *
     * @return array|false
     * @author Dmitry (dio) Levashov
     **/
    protected function _stat($path)
    {
        $outPath = $this->convEncOut($path);
        if (isset($this->cache[$outPath])) {
            return $this->convEncIn($this->cache[$outPath]);
        } else {
            $this->convEncIn();
        }
        if ($path === $this->root) {
            $res = array(
                'name' => $this->root,
                'mime' => 'directory',
                'dirs' => -1
            );
            if ($this->needOnline && (($this->ARGS['cmd'] === 'open' && $this->ARGS['target'] === $this->encode($this->root)) || $this->isMyReload())) {
                $check = array(
                    'ts' => true,
                    'dirs' => true,
                );
                $ts = 0;
                foreach ($this->ftpRawList($path) as $info) {
                    if ($info['filename'] === '.') {
                        $info['filename'] = 'root';
                        if ($stat = $this->parseRaw($info, $path)) {
                            unset($stat['name']);
                            $res = array_merge($res, $stat);
                            if ($res['ts']) {
                                $ts = 0;
                                unset($check['ts']);
                            }
                        }
                    }
                    if ($check && ($stat = $this->parseRaw($info, $path))) {
                        if (isset($stat['ts']) && !empty($stat['ts'])) {
                            $ts = max($ts, $stat['ts']);
                        }
                        if (isset($stat['dirs']) && $stat['mime'] === 'directory') {
                            $res['dirs'] = 1;
                            unset($stat['dirs']);
                        }
                        if (!$check) {
                            break;
                        }
                    }
                }
                if ($ts) {
                    $res['ts'] = $ts;
                }
                $this->cache[$outPath] = $res;
            }
            return $res;
        }

$pPath = $this->_dirname($path);
        if ($this->_inPath($pPath, $this->root)) {
            $outPPpath = $this->convEncOut($pPath);
            if (!isset($this->dirsCache[$outPPpath])) {
                $parentSubdirs = null;
                if (isset($this->sessionCache['subdirs']) && isset($this->sessionCache['subdirs'][$outPPpath])) {
                    $parentSubdirs = $this->sessionCache['subdirs'][$outPPpath];
                }
                $this->cacheDir($outPPpath);
                if ($parentSubdirs) {
                    $this->sessionCache['subdirs'][$outPPpath] = $parentSubdirs;
                }
            }
        }

$stat = $this->convEncIn(isset($this->cache[$outPath]) ? $this->cache[$outPath] : array());
        if (!$this->mounted) {
            // dispose incomplete cache made by calling `stat` by 'startPath' option
            $this->cache = array();
        }

return $stat;
    }

/**
     * Return true if path is dir and has at least one childs directory
     *
     * @param  string $path dir path
     *
     * @return bool
     * @author Dmitry (dio) Levashov, sitecode
     **/
    protected function _subdirs($path)
    {
        foreach ($this->ftpRawList($path) as $info) {
            $name = $info['filename'];
            if ($name && $name !== '.' && $name !== '..' && $info['type'] == NET_SFTP_TYPE_DIRECTORY) {
                return true;
            }
            if ($name && $name !== '.' && $name !== '..' && $info['type'] == NET_SFTP_TYPE_SYMLINK) {
                //return true;
            }
        }

return false;
    }

/******************** file/dir content *********************/

/**
     * Open file and return file pointer
     *
     * @param  string $path file path
     * @param string  $mode
     *
     * @return false|resource
     * @throws elFinderAbortException
     * @internal param bool $write open file for writing
     * @author   Dmitry (dio) Levashov
     */
    protected function _fopen($path, $mode = 'rb')
    {
        if ($this->tmp) {
            $local = $this->getTempFile($path);
            $this->connect->get($path, $local);
            return @fopen($local, $mode);
        }

return false;
    }

/**
     * Close opened file
     *
     * @param  resource $fp file pointer
     * @param string    $path
     *
     * @return void
     * @author Dmitry (dio) Levashov
     */
    protected function _fclose($fp, $path = '')
    {
        is_resource($fp) && fclose($fp);
        if ($path) {
            unlink($this->getTempFile($path));
        }
    }

/********************  file/dir manipulations *************************/

/**
     * Create dir and return created dir path or false on failed
     *
     * @param  string $path parent dir path
     * @param string  $name new directory name
     *
     * @return string|bool
     * @author Dmitry (dio) Levashov
     **/
    protected function _mkdir($path, $name)
    {
        $path = $this->_joinPath($path, $this->_basename($name));
        if ($this->connect->mkdir($path) === false) {
            return false;
        }

$this->options['dirMode'] && $this->connect->chmod($this->options['dirMode'], $path);
        return $path;
    }

/**
     * Create file and return it's path or false on failed
     *
     * @param  string $path parent dir path
     * @param string  $name new file name
     *
     * @return string|bool
     * @author sitecode
     **/
    protected function _mkfile($path, $name)
    {
        $path = $this->_joinPath($path, $this->_basename($name));
        return $this->connect->put($path, '') ? $path : false;
/*
        if ($this->tmp) {
            $path = $this->_joinPath($path, $name);
            $local = $this->getTempFile();
            $res = touch($local) && $this->connect->put($path, $local, NET_SFTP_LOCAL_FILE);
            unlink($local);
            return $res ? $path : false;
        }

return false;
 */
    }

/**
     * Copy file into another file
     *
     * @param  string $source    source file path
     * @param  string $targetDir target directory path
     * @param  string $name      new file name
     *
     * @return bool
     * @author Dmitry (dio) Levashov, sitecode
     **/
    protected function _copy($source, $targetDir, $name)
    {
        $res = false;

$target = $this->_joinPath($targetDir, $this->_basename($name));
        if ($this->tmp) {
            $local = $this->getTempFile();

if ($this->connect->get($source, $local)
                && $this->connect->put($target, $local, NET_SFTP_LOCAL_FILE)) {
                $res = true;
            }
            unlink($local);
        } else {
            //not memory efficient
            $res = $this->_filePutContents($target, $this->_getContents($source));
        }

return $res;
    }

/**
     * Move file into another parent dir.
     * Return new file path or false.
     *
     * @param  string $source source file path
     * @param         $targetDir
     * @param  string $name   file name
     *
     * @return bool|string
     * @internal param string $target target dir path
     * @author   Dmitry (dio) Levashov
     */
    protected function _move($source, $targetDir, $name)
    {
        $target = $this->_joinPath($targetDir, $this->_basename($name));
        return $this->connect->rename($source, $target) ? $target : false;
    }

/**
     * Remove file
     *
     * @param  string $path file path
     *
     * @return bool
     * @author Dmitry (dio) Levashov
     **/
    protected function _unlink($path)
    {
        return $this->connect->delete($path, false);
    }

/**
     * Remove dir
     *
     * @param  string $path dir path
     *
     * @return bool
     * @author Dmitry (dio) Levashov
     **/
    protected function _rmdir($path)
    {
        return $this->connect->delete($path);
    }

/**
     * Create new file and write into it from file pointer.
     * Return new file path or false on error.
     *
     * @param  resource $fp   file pointer
     * @param  string   $dir  target dir path
     * @param  string   $name file name
     * @param  array    $stat file stat (required by some virtual fs)
     *
     * @return bool|string
     * @author Dmitry (dio) Levashov
     **/
    protected function _save($fp, $dir, $name, $stat)
    {
        //TODO optionally encrypt $fp before uploading if mime is not already encrypted type
        $path = $this->_joinPath($dir, $this->_basename($name));
        return $this->connect->put($path, $fp)
            ? $path
            : false;
    }

/**
     * Get file contents
     *
     * @param  string $path file path
     *
     * @return string|false
     * @throws elFinderAbortException
     * @author Dmitry (dio) Levashov
     */
    protected function _getContents($path)
    {
        return $this->connect->get($path);
    }

/**
     * Write a string to a file
     *
     * @param  string $path    file path
     * @param  string $content new file content
     *
     * @return bool
     * @author Dmitry (dio) Levashov
     **/
    protected function _filePutContents($path, $content)
    {
        return $this->connect->put($path, $content);
    }

/**
     * chmod availability
     *
     * @param string $path
     * @param string $mode
     *
     * @return bool
     */
    protected function _chmod($path, $mode)
    {
        $modeOct = is_string($mode) ? octdec($mode) : octdec(sprintf("%04o", $mode));
        return $this->connect->chmod($modeOct, $path);
    }

/**
     * Extract files from archive
     *
     * @param  string $path archive path
     * @param  array  $arc  archiver command and arguments (same as in $this->archivers)
     *
     * @return true
     * @throws elFinderAbortException
     * @author Dmitry (dio) Levashov,
     * @author Alexey Sukhotin
     */
    protected function _extract($path, $arc)
    {
        return false; //TODO
    }

/**
     * Create archive and return its path
     *
     * @param  string $dir   target dir
     * @param  array  $files files names list
     * @param  string $name  archive name
     * @param  array  $arc   archiver options
     *
     * @return string|bool
     * @throws elFinderAbortException
     * @author Dmitry (dio) Levashov,
     * @author Alexey Sukhotin
     */
    protected function _archive($dir, $files, $name, $arc)
    {
        return false; //TODO
    }

/**
     * Gets an array of absolute remote SFTP paths of files and
     * folders in $remote_directory omitting symbolic links.
     *
     * @param $remote_directory string remote SFTP path to scan for file and folders recursively
     * @param $targets          array  Array of target item. `null` is to get all of items
     *
     * @return array of elements each of which is an array of two elements:
     * <ul>
     * <li>$item['path'] - absolute remote SFTP path</li>
     * <li>$item['type'] - either 'f' for file or 'd' for directory</li>
     * </ul>
     */
    protected function ftp_scan_dir($remote_directory, $targets = null)
    {
        $buff = $this->ftpRawList($remote_directory);
        $items = array();
        if ($targets && is_array($targets)) {
            $targets = array_flip($targets);
        } else {
            $targets = false;
        }
        foreach ($buff as $info) {
            $name = $info['filename'];
            if ($name !== '.' && $name !== '..' && (!$targets || isset($targets[$name]))) {
                switch ($info['type']) {
                    case NET_SFTP_TYPE_SYMLINK : //omit symbolic links
                    case NET_SFTP_TYPE_DIRECTORY :
                        $remote_file_path = $this->_joinPath($remote_directory, $name);
                        $item = array();
                        $item['path'] = $remote_file_path;
                        $item['type'] = 'd'; // normal file
                        $items[] = $item;
                        $items = array_merge($items, $this->ftp_scan_dir($remote_file_path));
                        break;
                    default:
                        $remote_file_path = $this->_joinPath($remote_directory, $name);
                        $item = array();
                        $item['path'] = $remote_file_path;
                        $item['type'] = 'f'; // normal file
                        $items[] = $item;
                }
            }
        }
        return $items;
    }

} // END class

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