/
SFTP.php
3240 lines (2913 loc) · 100 KB
/
SFTP.php
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<?php
/**
* Pure-PHP implementation of SFTP.
*
* PHP versions 4 and 5
*
* Currently only supports SFTPv2 and v3, which, according to wikipedia.org, "is the most widely used version,
* implemented by the popular OpenSSH SFTP server". If you want SFTPv4/5/6 support, provide me with access
* to an SFTPv4/5/6 server.
*
* The API for this library is modeled after the API from PHP's {@link http://php.net/book.ftp FTP extension}.
*
* Here's a short example of how to use this library:
* <code>
* <?php
* include 'Net/SFTP.php';
*
* $sftp = new Net_SFTP('www.domain.tld');
* if (!$sftp->login('username', 'password')) {
* exit('Login Failed');
* }
*
* echo $sftp->pwd() . "\r\n";
* $sftp->put('filename.ext', 'hello, world!');
* print_r($sftp->nlist());
* ?>
* </code>
*
* LICENSE: Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*
* @category Net
* @package Net_SFTP
* @author Jim Wigginton <terrafrost@php.net>
* @copyright 2009 Jim Wigginton
* @license http://www.opensource.org/licenses/mit-license.html MIT License
* @link http://phpseclib.sourceforge.net
*/
/**
* Include Net_SSH2
*/
if (!class_exists('Net_SSH2')) {
include_once 'SSH2.php';
}
/**#@+
* @access public
* @see self::getLog()
*/
/**
* Returns the message numbers
*/
define('NET_SFTP_LOG_SIMPLE', NET_SSH2_LOG_SIMPLE);
/**
* Returns the message content
*/
define('NET_SFTP_LOG_COMPLEX', NET_SSH2_LOG_COMPLEX);
/**
* Outputs the message content in real-time.
*/
define('NET_SFTP_LOG_REALTIME', 3);
/**#@-*/
/**
* SFTP channel constant
*
* Net_SSH2::exec() uses 0 and Net_SSH2::read() / Net_SSH2::write() use 1.
*
* @see Net_SSH2::_send_channel_packet()
* @see Net_SSH2::_get_channel_packet()
* @access private
*/
define('NET_SFTP_CHANNEL', 0x100);
/**#@+
* @access public
* @see self::put()
*/
/**
* Reads data from a local file.
*/
define('NET_SFTP_LOCAL_FILE', 1);
/**
* Reads data from a string.
*/
// this value isn't really used anymore but i'm keeping it reserved for historical reasons
define('NET_SFTP_STRING', 2);
/**
* Reads data from callback:
* function callback($length) returns string to proceed, null for EOF
*/
define('NET_SFTP_CALLBACK', 16);
/**
* Resumes an upload
*/
define('NET_SFTP_RESUME', 4);
/**
* Append a local file to an already existing remote file
*/
define('NET_SFTP_RESUME_START', 8);
/**#@-*/
/**
* Pure-PHP implementations of SFTP.
*
* @package Net_SFTP
* @author Jim Wigginton <terrafrost@php.net>
* @access public
*/
class Net_SFTP extends Net_SSH2
{
/**
* Packet Types
*
* @see self::Net_SFTP()
* @var array
* @access private
*/
var $packet_types = array();
/**
* Status Codes
*
* @see self::Net_SFTP()
* @var array
* @access private
*/
var $status_codes = array();
/**
* The Request ID
*
* The request ID exists in the off chance that a packet is sent out-of-order. Of course, this library doesn't support
* concurrent actions, so it's somewhat academic, here.
*
* @var boolean
* @see self::_send_sftp_packet()
* @access private
*/
var $use_request_id = false;
/**
* The Packet Type
*
* The request ID exists in the off chance that a packet is sent out-of-order. Of course, this library doesn't support
* concurrent actions, so it's somewhat academic, here.
*
* @var int
* @see self::_get_sftp_packet()
* @access private
*/
var $packet_type = -1;
/**
* Packet Buffer
*
* @var string
* @see self::_get_sftp_packet()
* @access private
*/
var $packet_buffer = '';
/**
* Extensions supported by the server
*
* @var array
* @see self::_initChannel()
* @access private
*/
var $extensions = array();
/**
* Server SFTP version
*
* @var int
* @see self::_initChannel()
* @access private
*/
var $version;
/**
* Current working directory
*
* @var string
* @see self::realpath()
* @see self::chdir()
* @access private
*/
var $pwd = false;
/**
* Packet Type Log
*
* @see self::getLog()
* @var array
* @access private
*/
var $packet_type_log = array();
/**
* Packet Log
*
* @see self::getLog()
* @var array
* @access private
*/
var $packet_log = array();
/**
* Error information
*
* @see self::getSFTPErrors()
* @see self::getLastSFTPError()
* @var array
* @access private
*/
var $sftp_errors = array();
/**
* Stat Cache
*
* Rather than always having to open a directory and close it immediately there after to see if a file is a directory
* we'll cache the results.
*
* @see self::_update_stat_cache()
* @see self::_remove_from_stat_cache()
* @see self::_query_stat_cache()
* @var array
* @access private
*/
var $stat_cache = array();
/**
* Max SFTP Packet Size
*
* @see self::Net_SFTP()
* @see self::get()
* @var array
* @access private
*/
var $max_sftp_packet;
/**
* Stat Cache Flag
*
* @see self::disableStatCache()
* @see self::enableStatCache()
* @var bool
* @access private
*/
var $use_stat_cache = true;
/**
* Sort Options
*
* @see self::_comparator()
* @see self::setListOrder()
* @var array
* @access private
*/
var $sortOptions = array();
/**
* Canonicalization Flag
*
* Determines whether or not paths should be canonicalized before being
* passed on to the remote server.
*
* @see self::enablePathCanonicalization()
* @see self::disablePathCanonicalization()
* @see self::realpath()
* @var bool
* @access private
*/
var $canonicalize_paths = true;
/**
* Request Buffers
*
* @see self::_get_sftp_packet()
* @var array
* @access private
*/
var $requestBuffer = array();
/**
* Default Constructor.
*
* Connects to an SFTP server
*
* @param string $host
* @param int $port
* @param int $timeout
* @return Net_SFTP
* @access public
*/
function __construct($host, $port = 22, $timeout = 10)
{
parent::__construct($host, $port, $timeout);
$this->max_sftp_packet = 1 << 15;
$this->packet_types = array(
1 => 'NET_SFTP_INIT',
2 => 'NET_SFTP_VERSION',
/* the format of SSH_FXP_OPEN changed between SFTPv4 and SFTPv5+:
SFTPv5+: http://tools.ietf.org/html/draft-ietf-secsh-filexfer-13#section-8.1.1
pre-SFTPv5 : http://tools.ietf.org/html/draft-ietf-secsh-filexfer-04#section-6.3 */
3 => 'NET_SFTP_OPEN',
4 => 'NET_SFTP_CLOSE',
5 => 'NET_SFTP_READ',
6 => 'NET_SFTP_WRITE',
7 => 'NET_SFTP_LSTAT',
9 => 'NET_SFTP_SETSTAT',
11 => 'NET_SFTP_OPENDIR',
12 => 'NET_SFTP_READDIR',
13 => 'NET_SFTP_REMOVE',
14 => 'NET_SFTP_MKDIR',
15 => 'NET_SFTP_RMDIR',
16 => 'NET_SFTP_REALPATH',
17 => 'NET_SFTP_STAT',
/* the format of SSH_FXP_RENAME changed between SFTPv4 and SFTPv5+:
SFTPv5+: http://tools.ietf.org/html/draft-ietf-secsh-filexfer-13#section-8.3
pre-SFTPv5 : http://tools.ietf.org/html/draft-ietf-secsh-filexfer-04#section-6.5 */
18 => 'NET_SFTP_RENAME',
19 => 'NET_SFTP_READLINK',
20 => 'NET_SFTP_SYMLINK',
101=> 'NET_SFTP_STATUS',
102=> 'NET_SFTP_HANDLE',
/* the format of SSH_FXP_NAME changed between SFTPv3 and SFTPv4+:
SFTPv4+: http://tools.ietf.org/html/draft-ietf-secsh-filexfer-13#section-9.4
pre-SFTPv4 : http://tools.ietf.org/html/draft-ietf-secsh-filexfer-02#section-7 */
103=> 'NET_SFTP_DATA',
104=> 'NET_SFTP_NAME',
105=> 'NET_SFTP_ATTRS',
200=> 'NET_SFTP_EXTENDED'
);
$this->status_codes = array(
0 => 'NET_SFTP_STATUS_OK',
1 => 'NET_SFTP_STATUS_EOF',
2 => 'NET_SFTP_STATUS_NO_SUCH_FILE',
3 => 'NET_SFTP_STATUS_PERMISSION_DENIED',
4 => 'NET_SFTP_STATUS_FAILURE',
5 => 'NET_SFTP_STATUS_BAD_MESSAGE',
6 => 'NET_SFTP_STATUS_NO_CONNECTION',
7 => 'NET_SFTP_STATUS_CONNECTION_LOST',
8 => 'NET_SFTP_STATUS_OP_UNSUPPORTED',
9 => 'NET_SFTP_STATUS_INVALID_HANDLE',
10 => 'NET_SFTP_STATUS_NO_SUCH_PATH',
11 => 'NET_SFTP_STATUS_FILE_ALREADY_EXISTS',
12 => 'NET_SFTP_STATUS_WRITE_PROTECT',
13 => 'NET_SFTP_STATUS_NO_MEDIA',
14 => 'NET_SFTP_STATUS_NO_SPACE_ON_FILESYSTEM',
15 => 'NET_SFTP_STATUS_QUOTA_EXCEEDED',
16 => 'NET_SFTP_STATUS_UNKNOWN_PRINCIPAL',
17 => 'NET_SFTP_STATUS_LOCK_CONFLICT',
18 => 'NET_SFTP_STATUS_DIR_NOT_EMPTY',
19 => 'NET_SFTP_STATUS_NOT_A_DIRECTORY',
20 => 'NET_SFTP_STATUS_INVALID_FILENAME',
21 => 'NET_SFTP_STATUS_LINK_LOOP',
22 => 'NET_SFTP_STATUS_CANNOT_DELETE',
23 => 'NET_SFTP_STATUS_INVALID_PARAMETER',
24 => 'NET_SFTP_STATUS_FILE_IS_A_DIRECTORY',
25 => 'NET_SFTP_STATUS_BYTE_RANGE_LOCK_CONFLICT',
26 => 'NET_SFTP_STATUS_BYTE_RANGE_LOCK_REFUSED',
27 => 'NET_SFTP_STATUS_DELETE_PENDING',
28 => 'NET_SFTP_STATUS_FILE_CORRUPT',
29 => 'NET_SFTP_STATUS_OWNER_INVALID',
30 => 'NET_SFTP_STATUS_GROUP_INVALID',
31 => 'NET_SFTP_STATUS_NO_MATCHING_BYTE_RANGE_LOCK'
);
// http://tools.ietf.org/html/draft-ietf-secsh-filexfer-13#section-7.1
// the order, in this case, matters quite a lot - see Net_SFTP::_parseAttributes() to understand why
$this->attributes = array(
0x00000001 => 'NET_SFTP_ATTR_SIZE',
0x00000002 => 'NET_SFTP_ATTR_UIDGID', // defined in SFTPv3, removed in SFTPv4+
0x00000004 => 'NET_SFTP_ATTR_PERMISSIONS',
0x00000008 => 'NET_SFTP_ATTR_ACCESSTIME',
// 0x80000000 will yield a floating point on 32-bit systems and converting floating points to integers
// yields inconsistent behavior depending on how php is compiled. so we left shift -1 (which, in
// two's compliment, consists of all 1 bits) by 31. on 64-bit systems this'll yield 0xFFFFFFFF80000000.
// that's not a problem, however, and 'anded' and a 32-bit number, as all the leading 1 bits are ignored.
(-1 << 31) & 0xFFFFFFFF => 'NET_SFTP_ATTR_EXTENDED'
);
// http://tools.ietf.org/html/draft-ietf-secsh-filexfer-04#section-6.3
// the flag definitions change somewhat in SFTPv5+. if SFTPv5+ support is added to this library, maybe name
// the array for that $this->open5_flags and similarly alter the constant names.
$this->open_flags = array(
0x00000001 => 'NET_SFTP_OPEN_READ',
0x00000002 => 'NET_SFTP_OPEN_WRITE',
0x00000004 => 'NET_SFTP_OPEN_APPEND',
0x00000008 => 'NET_SFTP_OPEN_CREATE',
0x00000010 => 'NET_SFTP_OPEN_TRUNCATE',
0x00000020 => 'NET_SFTP_OPEN_EXCL'
);
// http://tools.ietf.org/html/draft-ietf-secsh-filexfer-04#section-5.2
// see Net_SFTP::_parseLongname() for an explanation
$this->file_types = array(
1 => 'NET_SFTP_TYPE_REGULAR',
2 => 'NET_SFTP_TYPE_DIRECTORY',
3 => 'NET_SFTP_TYPE_SYMLINK',
4 => 'NET_SFTP_TYPE_SPECIAL',
5 => 'NET_SFTP_TYPE_UNKNOWN',
// the followin types were first defined for use in SFTPv5+
// http://tools.ietf.org/html/draft-ietf-secsh-filexfer-05#section-5.2
6 => 'NET_SFTP_TYPE_SOCKET',
7 => 'NET_SFTP_TYPE_CHAR_DEVICE',
8 => 'NET_SFTP_TYPE_BLOCK_DEVICE',
9 => 'NET_SFTP_TYPE_FIFO'
);
$this->_define_array(
$this->packet_types,
$this->status_codes,
$this->attributes,
$this->open_flags,
$this->file_types
);
if (!defined('NET_SFTP_QUEUE_SIZE')) {
define('NET_SFTP_QUEUE_SIZE', 32);
}
if (!defined('NET_SFTP_UPLOAD_QUEUE_SIZE')) {
define('NET_SFTP_UPLOAD_QUEUE_SIZE', 1024);
}
}
/**
* PHP4 compatible Default Constructor.
*
* @see self::__construct()
* @param string $host
* @param int $port
* @param int $timeout
* @access public
*/
function Net_SFTP($host, $port = 22, $timeout = 10)
{
$this->__construct($host, $port, $timeout);
}
/**
* Login
*
* @param string $username
* @param string $password
* @return bool
* @access public
*/
function login($username)
{
$args = func_get_args();
$callback = version_compare(PHP_VERSION, '5.3.0') < 0 ?
array(&$this, 'parent::login') :
'parent::login';
if (!call_user_func_array($callback, $args)) {
return false;
}
$this->window_size_server_to_client[NET_SFTP_CHANNEL] = $this->window_size;
$packet = pack(
'CNa*N3',
NET_SSH2_MSG_CHANNEL_OPEN,
strlen('session'),
'session',
NET_SFTP_CHANNEL,
$this->window_size,
0x4000
);
if (!$this->_send_binary_packet($packet)) {
return false;
}
$this->channel_status[NET_SFTP_CHANNEL] = NET_SSH2_MSG_CHANNEL_OPEN;
$response = $this->_get_channel_packet(NET_SFTP_CHANNEL, true);
if ($response === false) {
return false;
}
$packet = pack(
'CNNa*CNa*',
NET_SSH2_MSG_CHANNEL_REQUEST,
$this->server_channels[NET_SFTP_CHANNEL],
strlen('subsystem'),
'subsystem',
1,
strlen('sftp'),
'sftp'
);
if (!$this->_send_binary_packet($packet)) {
return false;
}
$this->channel_status[NET_SFTP_CHANNEL] = NET_SSH2_MSG_CHANNEL_REQUEST;
$response = $this->_get_channel_packet(NET_SFTP_CHANNEL, true);
if ($response === false) {
// from PuTTY's psftp.exe
$command = "test -x /usr/lib/sftp-server && exec /usr/lib/sftp-server\n" .
"test -x /usr/local/lib/sftp-server && exec /usr/local/lib/sftp-server\n" .
"exec sftp-server";
// we don't do $this->exec($command, false) because exec() operates on a different channel and plus the SSH_MSG_CHANNEL_OPEN that exec() does
// is redundant
$packet = pack(
'CNNa*CNa*',
NET_SSH2_MSG_CHANNEL_REQUEST,
$this->server_channels[NET_SFTP_CHANNEL],
strlen('exec'),
'exec',
1,
strlen($command),
$command
);
if (!$this->_send_binary_packet($packet)) {
return false;
}
$this->channel_status[NET_SFTP_CHANNEL] = NET_SSH2_MSG_CHANNEL_REQUEST;
$response = $this->_get_channel_packet(NET_SFTP_CHANNEL, true);
if ($response === false) {
return false;
}
}
$this->channel_status[NET_SFTP_CHANNEL] = NET_SSH2_MSG_CHANNEL_DATA;
if (!$this->_send_sftp_packet(NET_SFTP_INIT, "\0\0\0\3")) {
return false;
}
$response = $this->_get_sftp_packet();
if ($this->packet_type != NET_SFTP_VERSION) {
user_error('Expected SSH_FXP_VERSION');
return false;
}
if (strlen($response) < 4) {
return false;
}
extract(unpack('Nversion', $this->_string_shift($response, 4)));
$this->version = $version;
while (!empty($response)) {
if (strlen($response) < 4) {
return false;
}
extract(unpack('Nlength', $this->_string_shift($response, 4)));
$key = $this->_string_shift($response, $length);
if (strlen($response) < 4) {
return false;
}
extract(unpack('Nlength', $this->_string_shift($response, 4)));
$value = $this->_string_shift($response, $length);
$this->extensions[$key] = $value;
}
/*
SFTPv4+ defines a 'newline' extension. SFTPv3 seems to have unofficial support for it via 'newline@vandyke.com',
however, I'm not sure what 'newline@vandyke.com' is supposed to do (the fact that it's unofficial means that it's
not in the official SFTPv3 specs) and 'newline@vandyke.com' / 'newline' are likely not drop-in substitutes for
one another due to the fact that 'newline' comes with a SSH_FXF_TEXT bitmask whereas it seems unlikely that
'newline@vandyke.com' would.
*/
/*
if (isset($this->extensions['newline@vandyke.com'])) {
$this->extensions['newline'] = $this->extensions['newline@vandyke.com'];
unset($this->extensions['newline@vandyke.com']);
}
*/
$this->use_request_id = true;
/*
A Note on SFTPv4/5/6 support:
<http://tools.ietf.org/html/draft-ietf-secsh-filexfer-13#section-5.1> states the following:
"If the client wishes to interoperate with servers that support noncontiguous version
numbers it SHOULD send '3'"
Given that the server only sends its version number after the client has already done so, the above
seems to be suggesting that v3 should be the default version. This makes sense given that v3 is the
most popular.
<http://tools.ietf.org/html/draft-ietf-secsh-filexfer-13#section-5.5> states the following;
"If the server did not send the "versions" extension, or the version-from-list was not included, the
server MAY send a status response describing the failure, but MUST then close the channel without
processing any further requests."
So what do you do if you have a client whose initial SSH_FXP_INIT packet says it implements v3 and
a server whose initial SSH_FXP_VERSION reply says it implements v4 and only v4? If it only implements
v4, the "versions" extension is likely not going to have been sent so version re-negotiation as discussed
in draft-ietf-secsh-filexfer-13 would be quite impossible. As such, what Net_SFTP would do is close the
channel and reopen it with a new and updated SSH_FXP_INIT packet.
*/
switch ($this->version) {
case 2:
case 3:
break;
default:
return false;
}
$this->pwd = $this->_realpath('.');
$this->_update_stat_cache($this->pwd, array());
return true;
}
/**
* Disable the stat cache
*
* @access public
*/
function disableStatCache()
{
$this->use_stat_cache = false;
}
/**
* Enable the stat cache
*
* @access public
*/
function enableStatCache()
{
$this->use_stat_cache = true;
}
/**
* Clear the stat cache
*
* @access public
*/
function clearStatCache()
{
$this->stat_cache = array();
}
/**
* Enable path canonicalization
*
* @access public
*/
function enablePathCanonicalization()
{
$this->canonicalize_paths = true;
}
/**
* Enable path canonicalization
*
* @access public
*/
function disablePathCanonicalization()
{
$this->canonicalize_paths = false;
}
/**
* Returns the current directory name
*
* @return mixed
* @access public
*/
function pwd()
{
return $this->pwd;
}
/**
* Logs errors
*
* @param string $response
* @param int $status
* @access public
*/
function _logError($response, $status = -1)
{
if ($status == -1) {
if (strlen($response) < 4) {
return;
}
extract(unpack('Nstatus', $this->_string_shift($response, 4)));
}
$error = $this->status_codes[$status];
if ($this->version > 2 || strlen($response) < 4) {
extract(unpack('Nlength', $this->_string_shift($response, 4)));
$this->sftp_errors[] = $error . ': ' . $this->_string_shift($response, $length);
} else {
$this->sftp_errors[] = $error;
}
}
/**
* Returns canonicalized absolute pathname
*
* realpath() expands all symbolic links and resolves references to '/./', '/../' and extra '/' characters in the input
* path and returns the canonicalized absolute pathname.
*
* @param string $path
* @return mixed
* @access public
*/
function realpath($path)
{
return $this->_realpath($path);
}
/**
* Canonicalize the Server-Side Path Name
*
* SFTP doesn't provide a mechanism by which the current working directory can be changed, so we'll emulate it. Returns
* the absolute (canonicalized) path.
*
* If canonicalize_paths has been disabled using disablePathCanonicalization(), $path is returned as-is.
*
* @see self::chdir()
* @see self::disablePathCanonicalization()
* @param string $path
* @return mixed
* @access private
*/
function _realpath($path)
{
if (!$this->canonicalize_paths) {
return $path;
}
if ($this->pwd === false) {
// http://tools.ietf.org/html/draft-ietf-secsh-filexfer-13#section-8.9
if (!$this->_send_sftp_packet(NET_SFTP_REALPATH, pack('Na*', strlen($path), $path))) {
return false;
}
$response = $this->_get_sftp_packet();
switch ($this->packet_type) {
case NET_SFTP_NAME:
// although SSH_FXP_NAME is implemented differently in SFTPv3 than it is in SFTPv4+, the following
// should work on all SFTP versions since the only part of the SSH_FXP_NAME packet the following looks
// at is the first part and that part is defined the same in SFTP versions 3 through 6.
$this->_string_shift($response, 4); // skip over the count - it should be 1, anyway
if (strlen($response) < 4) {
return false;
}
extract(unpack('Nlength', $this->_string_shift($response, 4)));
return $this->_string_shift($response, $length);
case NET_SFTP_STATUS:
$this->_logError($response);
return false;
default:
user_error('Expected SSH_FXP_NAME or SSH_FXP_STATUS');
return false;
}
}
if (!strlen($path) || $path[0] != '/') {
$path = $this->pwd . '/' . $path;
}
$path = explode('/', $path);
$new = array();
foreach ($path as $dir) {
if (!strlen($dir)) {
continue;
}
switch ($dir) {
case '..':
array_pop($new);
case '.':
break;
default:
$new[] = $dir;
}
}
return '/' . implode('/', $new);
}
/**
* Changes the current directory
*
* @param string $dir
* @return bool
* @access public
*/
function chdir($dir)
{
if (!($this->bitmap & NET_SSH2_MASK_LOGIN)) {
return false;
}
// assume current dir if $dir is empty
if ($dir === '') {
$dir = './';
// suffix a slash if needed
} elseif ($dir[strlen($dir) - 1] != '/') {
$dir.= '/';
}
$dir = $this->_realpath($dir);
// confirm that $dir is, in fact, a valid directory
if ($this->use_stat_cache && is_array($this->_query_stat_cache($dir))) {
$this->pwd = $dir;
return true;
}
// we could do a stat on the alleged $dir to see if it's a directory but that doesn't tell us
// the currently logged in user has the appropriate permissions or not. maybe you could see if
// the file's uid / gid match the currently logged in user's uid / gid but how there's no easy
// way to get those with SFTP
if (!$this->_send_sftp_packet(NET_SFTP_OPENDIR, pack('Na*', strlen($dir), $dir))) {
return false;
}
// see Net_SFTP::nlist() for a more thorough explanation of the following
$response = $this->_get_sftp_packet();
switch ($this->packet_type) {
case NET_SFTP_HANDLE:
$handle = substr($response, 4);
break;
case NET_SFTP_STATUS:
$this->_logError($response);
return false;
default:
user_error('Expected SSH_FXP_HANDLE or SSH_FXP_STATUS');
return false;
}
if (!$this->_close_handle($handle)) {
return false;
}
$this->_update_stat_cache($dir, array());
$this->pwd = $dir;
return true;
}
/**
* Returns a list of files in the given directory
*
* @param string $dir
* @param bool $recursive
* @return mixed
* @access public
*/
function nlist($dir = '.', $recursive = false)
{
return $this->_nlist_helper($dir, $recursive, '');
}
/**
* Helper method for nlist
*
* @param string $dir
* @param bool $recursive
* @param string $relativeDir
* @return mixed
* @access private
*/
function _nlist_helper($dir, $recursive, $relativeDir)
{
$files = $this->_list($dir, false);
if (!$recursive || $files === false) {
return $files;
}
$result = array();
foreach ($files as $value) {
if ($value == '.' || $value == '..') {
if ($relativeDir == '') {
$result[] = $value;
}
continue;
}
if (is_array($this->_query_stat_cache($this->_realpath($dir . '/' . $value)))) {
$temp = $this->_nlist_helper($dir . '/' . $value, true, $relativeDir . $value . '/');
$temp = is_array($temp) ? $temp : array();
$result = array_merge($result, $temp);
} else {
$result[] = $relativeDir . $value;
}
}
return $result;
}
/**
* Returns a detailed list of files in the given directory
*
* @param string $dir
* @param bool $recursive
* @return mixed
* @access public
*/
function rawlist($dir = '.', $recursive = false)
{
$files = $this->_list($dir, true);
if (!$recursive || $files === false) {
return $files;
}
static $depth = 0;
foreach ($files as $key => $value) {
if ($depth != 0 && $key == '..') {
unset($files[$key]);
continue;
}
$is_directory = false;
if ($key != '.' && $key != '..') {
if ($this->use_stat_cache) {
$is_directory = is_array($this->_query_stat_cache($this->_realpath($dir . '/' . $key)));
} else {
$stat = $this->lstat($dir . '/' . $key);
$is_directory = $stat && $stat['type'] === NET_SFTP_TYPE_DIRECTORY;
}
}
if ($is_directory) {
$depth++;
$files[$key] = $this->rawlist($dir . '/' . $key, true);
$depth--;
} else {
$files[$key] = (object) $value;
}
}
return $files;
}
/**
* Reads a list, be it detailed or not, of files in the given directory
*
* @param string $dir
* @param bool $raw
* @return mixed
* @access private
*/
function _list($dir, $raw = true)
{
if (!($this->bitmap & NET_SSH2_MASK_LOGIN)) {
return false;
}
$dir = $this->_realpath($dir . '/');
if ($dir === false) {
return false;
}
// http://tools.ietf.org/html/draft-ietf-secsh-filexfer-13#section-8.1.2
if (!$this->_send_sftp_packet(NET_SFTP_OPENDIR, pack('Na*', strlen($dir), $dir))) {
return false;
}
$response = $this->_get_sftp_packet();
switch ($this->packet_type) {
case NET_SFTP_HANDLE:
// http://tools.ietf.org/html/draft-ietf-secsh-filexfer-13#section-9.2
// since 'handle' is the last field in the SSH_FXP_HANDLE packet, we'll just remove the first four bytes that
// represent the length of the string and leave it at that
$handle = substr($response, 4);
break;
case NET_SFTP_STATUS:
// presumably SSH_FX_NO_SUCH_FILE or SSH_FX_PERMISSION_DENIED
$this->_logError($response);
return false;
default:
user_error('Expected SSH_FXP_HANDLE or SSH_FXP_STATUS');
return false;
}