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<?php
/**
* WordPress Filesystem Class for implementing SSH2
*
* To use this class you must follow these steps for PHP 5.2.6+
*
* @contrib http://kevin.vanzonneveld.net/techblog/article/make_ssh_connections_with_php/ - Installation Notes
*
* Complie libssh2 (Note: Only 0.14 is officaly working with PHP 5.2.6+ right now, But many users have found the latest versions work)
*
* cd /usr/src
* wget http://surfnet.dl.sourceforge.net/sourceforge/libssh2/libssh2-0.14.tar.gz
* tar -zxvf libssh2-0.14.tar.gz
* cd libssh2-0.14/
* ./configure
* make all install
*
* Note: Do not leave the directory yet!
*
* Enter: pecl install -f ssh2
*
* Copy the ssh.so file it creates to your PHP Module Directory.
* Open up your PHP.INI file and look for where extensions are placed.
* Add in your PHP.ini file: extension=ssh2.so
*
* Restart Apache!
* Check phpinfo() streams to confirm that: ssh2.shell, ssh2.exec, ssh2.tunnel, ssh2.scp, ssh2.sftp exist.
*
* Note: as of WordPress 2.8, This utilises the PHP5+ function 'stream_get_contents'
*
* @since 2.7.0
*
* @package WordPress
* @subpackage Filesystem
*/
class WP_Filesystem_SSH2 extends WP_Filesystem_Base {
public $link = false;
public $sftp_link = false;
public $keys = false;
public $errors = array();
public $options = array();
public function __construct($opt='') {
$this->method = 'ssh2';
$this->errors = new WP_Error();
//Check if possible to use ssh2 functions.
if ( ! extension_loaded('ssh2') ) {
$this->errors->add('no_ssh2_ext', __('The ssh2 PHP extension is not available'));
return false;
}
if ( !function_exists('stream_get_contents') ) {
$this->errors->add('ssh2_php_requirement', __('The ssh2 PHP extension is available, however, we require the PHP5 function <code>stream_get_contents()</code>'));
return false;
}
// Set defaults:
if ( empty($opt['port']) )
$this->options['port'] = 22;
else
$this->options['port'] = $opt['port'];
if ( empty($opt['hostname']) )
$this->errors->add('empty_hostname', __('SSH2 hostname is required'));
else
$this->options['hostname'] = $opt['hostname'];
if ( ! empty($opt['base']) )
$this->wp_base = $opt['base'];
// Check if the options provided are OK.
if ( !empty ($opt['public_key']) && !empty ($opt['private_key']) ) {
$this->options['public_key'] = $opt['public_key'];
$this->options['private_key'] = $opt['private_key'];
$this->options['hostkey'] = array('hostkey' => 'ssh-rsa');
$this->keys = true;
} elseif ( empty ($opt['username']) ) {
$this->errors->add('empty_username', __('SSH2 username is required'));
}
if ( !empty($opt['username']) )
$this->options['username'] = $opt['username'];
if ( empty ($opt['password']) ) {
// Password can be blank if we are using keys.
if ( !$this->keys )
$this->errors->add('empty_password', __('SSH2 password is required'));
} else {
$this->options['password'] = $opt['password'];
}
}
public function connect() {
if ( ! $this->keys ) {
$this->link = @ssh2_connect($this->options['hostname'], $this->options['port']);
} else {
$this->link = @ssh2_connect($this->options['hostname'], $this->options['port'], $this->options['hostkey']);
}
if ( ! $this->link ) {
$this->errors->add('connect', sprintf(__('Failed to connect to SSH2 Server %1$s:%2$s'), $this->options['hostname'], $this->options['port']));
return false;
}
if ( !$this->keys ) {
if ( ! @ssh2_auth_password($this->link, $this->options['username'], $this->options['password']) ) {
$this->errors->add('auth', sprintf(__('Username/Password incorrect for %s'), $this->options['username']));
return false;
}
} else {
if ( ! @ssh2_auth_pubkey_file($this->link, $this->options['username'], $this->options['public_key'], $this->options['private_key'], $this->options['password'] ) ) {
$this->errors->add('auth', sprintf(__('Public and Private keys incorrect for %s'), $this->options['username']));
return false;
}
}
$this->sftp_link = ssh2_sftp($this->link);
return true;
}
public function run_command( $command, $returnbool = false) {
if ( ! $this->link )
return false;
if ( ! ($stream = ssh2_exec($this->link, $command)) ) {
$this->errors->add('command', sprintf(__('Unable to perform command: %s'), $command));
} else {
stream_set_blocking( $stream, true );
stream_set_timeout( $stream, FS_TIMEOUT );
$data = stream_get_contents( $stream );
fclose( $stream );
if ( $returnbool )
return ( $data === false ) ? false : '' != trim($data);
else
return $data;
}
return false;
}
public function get_contents( $file ) {
$file = ltrim($file, '/');
return file_get_contents('ssh2.sftp://' . $this->sftp_link . '/' . $file);
}
public function get_contents_array($file) {
$file = ltrim($file, '/');
return file('ssh2.sftp://' . $this->sftp_link . '/' . $file);
}
public function put_contents($file, $contents, $mode = false ) {
$ret = file_put_contents( 'ssh2.sftp://' . $this->sftp_link . '/' . ltrim( $file, '/' ), $contents );
if ( $ret !== strlen( $contents ) )
return false;
$this->chmod($file, $mode);
return true;
}
public function cwd() {
$cwd = $this->run_command('pwd');
if ( $cwd )
$cwd = trailingslashit($cwd);
return $cwd;
}
public function chdir($dir) {
return $this->run_command('cd ' . $dir, true);
}
public function chgrp($file, $group, $recursive = false ) {
if ( ! $this->exists($file) )
return false;
if ( ! $recursive || ! $this->is_dir($file) )
return $this->run_command(sprintf('chgrp %s %s', escapeshellarg($group), escapeshellarg($file)), true);
return $this->run_command(sprintf('chgrp -R %s %s', escapeshellarg($group), escapeshellarg($file)), true);
}
public function chmod($file, $mode = false, $recursive = false) {
if ( ! $this->exists($file) )
return false;
if ( ! $mode ) {
if ( $this->is_file($file) )
$mode = FS_CHMOD_FILE;
elseif ( $this->is_dir($file) )
$mode = FS_CHMOD_DIR;
else
return false;
}
if ( ! $recursive || ! $this->is_dir($file) )
return $this->run_command(sprintf('chmod %o %s', $mode, escapeshellarg($file)), true);
return $this->run_command(sprintf('chmod -R %o %s', $mode, escapeshellarg($file)), true);
}
/**
* Change the ownership of a file / folder.
*
* @since Unknown
*
* @param string $file Path to the file.
* @param mixed $owner A user name or number.
* @param bool $recursive Optional. If set True changes file owner recursivly. Defaults to False.
* @return bool Returns true on success or false on failure.
*/
public function chown( $file, $owner, $recursive = false ) {
if ( ! $this->exists($file) )
return false;
if ( ! $recursive || ! $this->is_dir($file) )
return $this->run_command(sprintf('chown %s %s', escapeshellarg($owner), escapeshellarg($file)), true);
return $this->run_command(sprintf('chown -R %s %s', escapeshellarg($owner), escapeshellarg($file)), true);
}
public function owner($file) {
$owneruid = @fileowner('ssh2.sftp://' . $this->sftp_link . '/' . ltrim($file, '/'));
if ( ! $owneruid )
return false;
if ( ! function_exists('posix_getpwuid') )
return $owneruid;
$ownerarray = posix_getpwuid($owneruid);
return $ownerarray['name'];
}
public function getchmod($file) {
return substr( decoct( @fileperms( 'ssh2.sftp://' . $this->sftp_link . '/' . ltrim( $file, '/' ) ) ), -3 );
}
public function group($file) {
$gid = @filegroup('ssh2.sftp://' . $this->sftp_link . '/' . ltrim($file, '/'));
if ( ! $gid )
return false;
if ( ! function_exists('posix_getgrgid') )
return $gid;
$grouparray = posix_getgrgid($gid);
return $grouparray['name'];
}
public function copy($source, $destination, $overwrite = false, $mode = false) {
if ( ! $overwrite && $this->exists($destination) )
return false;
$content = $this->get_contents($source);
if ( false === $content)
return false;
return $this->put_contents($destination, $content, $mode);
}
public function move($source, $destination, $overwrite = false) {
return @ssh2_sftp_rename($this->link, $source, $destination);
}
public function delete($file, $recursive = false, $type = false) {
if ( 'f' == $type || $this->is_file($file) )
return ssh2_sftp_unlink($this->sftp_link, $file);
if ( ! $recursive )
return ssh2_sftp_rmdir($this->sftp_link, $file);
$filelist = $this->dirlist($file);
if ( is_array($filelist) ) {
foreach ( $filelist as $filename => $fileinfo) {
$this->delete($file . '/' . $filename, $recursive, $fileinfo['type']);
}
}
return ssh2_sftp_rmdir($this->sftp_link, $file);
}
public function exists($file) {
$file = ltrim($file, '/');
return file_exists('ssh2.sftp://' . $this->sftp_link . '/' . $file);
}
public function is_file($file) {
$file = ltrim($file, '/');
return is_file('ssh2.sftp://' . $this->sftp_link . '/' . $file);
}
public function is_dir($path) {
$path = ltrim($path, '/');
return is_dir('ssh2.sftp://' . $this->sftp_link . '/' . $path);
}
public function is_readable($file) {
$file = ltrim($file, '/');
return is_readable('ssh2.sftp://' . $this->sftp_link . '/' . $file);
}
public function is_writable($file) {
$file = ltrim($file, '/');
return is_writable('ssh2.sftp://' . $this->sftp_link . '/' . $file);
}
public function atime($file) {
$file = ltrim($file, '/');
return fileatime('ssh2.sftp://' . $this->sftp_link . '/' . $file);
}
public function mtime($file) {
$file = ltrim($file, '/');
return filemtime('ssh2.sftp://' . $this->sftp_link . '/' . $file);
}
public function size($file) {
$file = ltrim($file, '/');
return filesize('ssh2.sftp://' . $this->sftp_link . '/' . $file);
}
public function touch($file, $time = 0, $atime = 0) {
//Not implemented.
}
public function mkdir($path, $chmod = false, $chown = false, $chgrp = false) {
$path = untrailingslashit($path);
if ( empty($path) )
return false;
if ( ! $chmod )
$chmod = FS_CHMOD_DIR;
if ( ! ssh2_sftp_mkdir($this->sftp_link, $path, $chmod, true) )
return false;
if ( $chown )
$this->chown($path, $chown);
if ( $chgrp )
$this->chgrp($path, $chgrp);
return true;
}
public function rmdir($path, $recursive = false) {
return $this->delete($path, $recursive);
}
public function dirlist($path, $include_hidden = true, $recursive = false) {
if ( $this->is_file($path) ) {
$limit_file = basename($path);
$path = dirname($path);
} else {
$limit_file = false;
}
if ( ! $this->is_dir($path) )
return false;
$ret = array();
$dir = @dir('ssh2.sftp://' . $this->sftp_link .'/' . ltrim($path, '/') );
if ( ! $dir )
return false;
while (false !== ($entry = $dir->read()) ) {
$struc = array();
$struc['name'] = $entry;
if ( '.' == $struc['name'] || '..' == $struc['name'] )
continue; //Do not care about these folders.
if ( ! $include_hidden && '.' == $struc['name'][0] )
continue;
if ( $limit_file && $struc['name'] != $limit_file )
continue;
$struc['perms'] = $this->gethchmod($path.'/'.$entry);
$struc['permsn'] = $this->getnumchmodfromh($struc['perms']);
$struc['number'] = false;
$struc['owner'] = $this->owner($path.'/'.$entry);
$struc['group'] = $this->group($path.'/'.$entry);
$struc['size'] = $this->size($path.'/'.$entry);
$struc['lastmodunix']= $this->mtime($path.'/'.$entry);
$struc['lastmod'] = date('M j',$struc['lastmodunix']);
$struc['time'] = date('h:i:s',$struc['lastmodunix']);
$struc['type'] = $this->is_dir($path.'/'.$entry) ? 'd' : 'f';
if ( 'd' == $struc['type'] ) {
if ( $recursive )
$struc['files'] = $this->dirlist($path . '/' . $struc['name'], $include_hidden, $recursive);
else
$struc['files'] = array();
}
$ret[ $struc['name'] ] = $struc;
}
$dir->close();
unset($dir);
return $ret;
}
}
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