Needed for salmon which seems to have a fixation with forcing you to encode/decode ASN.1. Sick.
This commit is contained in:
Mike Macgirvin
parent
9c10ada906
commit
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23 changed files with 16337 additions and 0 deletions
1461
phpsec/Net/SFTP.php
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1461
phpsec/Net/SFTP.php
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<?php
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/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
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/**
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* Pure-PHP implementation of SFTP.
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*
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* PHP versions 4 and 5
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*
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* Currently only supports SFTPv3, which, according to wikipedia.org, "is the most widely used version,
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* implemented by the popular OpenSSH SFTP server". If you want SFTPv4/5/6 support, provide me with access
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* to an SFTPv4/5/6 server.
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*
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* The API for this library is modeled after the API from PHP's {@link http://php.net/book.ftp FTP extension}.
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*
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* Here's a short example of how to use this library:
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* <code>
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* <?php
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* include('Net/SFTP.php');
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*
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* $sftp = new Net_SFTP('www.domain.tld');
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* if (!$sftp->login('username', 'password')) {
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* exit('Login Failed');
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* }
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*
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* echo $sftp->pwd() . "\r\n";
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* $sftp->put('filename.ext', 'hello, world!');
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* print_r($sftp->nlist());
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* ?>
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* </code>
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*
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* LICENSE: This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*
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* @category Net
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* @package Net_SFTP
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* @author Jim Wigginton <terrafrost@php.net>
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* @copyright MMIX Jim Wigginton
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* @license http://www.gnu.org/licenses/lgpl.txt
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* @version $Id: SFTP.php,v 1.21 2010/04/09 02:31:34 terrafrost Exp $
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* @link http://phpseclib.sourceforge.net
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*/
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/**
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* Include Net_SSH2
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*/
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require_once('Net/SSH2.php');
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/**#@+
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* @access public
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* @see Net_SFTP::getLog()
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*/
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/**
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* Returns the message numbers
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*/
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define('NET_SFTP_LOG_SIMPLE', NET_SSH2_LOG_SIMPLE);
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/**
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* Returns the message content
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*/
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define('NET_SFTP_LOG_COMPLEX', NET_SSH2_LOG_COMPLEX);
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/**#@-*/
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/**
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* SFTP channel constant
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*
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* Net_SSH2::exec() uses 0 and Net_SSH2::interactiveRead() / Net_SSH2::interactiveWrite() use 1.
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*
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* @see Net_SSH2::_send_channel_packet()
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* @see Net_SSH2::_get_channel_packet()
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* @access private
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*/
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define('NET_SFTP_CHANNEL', 2);
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/**#@+
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* @access public
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* @see Net_SFTP::put()
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*/
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/**
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* Reads data from a local file.
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*/
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define('NET_SFTP_LOCAL_FILE', 1);
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/**
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* Reads data from a string.
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*/
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define('NET_SFTP_STRING', 2);
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/**#@-*/
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/**
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* Pure-PHP implementations of SFTP.
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*
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* @author Jim Wigginton <terrafrost@php.net>
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* @version 0.1.0
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* @access public
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* @package Net_SFTP
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*/
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class Net_SFTP extends Net_SSH2 {
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/**
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* Packet Types
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*
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* @see Net_SFTP::Net_SFTP()
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* @var Array
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* @access private
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*/
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var $packet_types = array();
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/**
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* Status Codes
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*
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* @see Net_SFTP::Net_SFTP()
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* @var Array
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* @access private
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*/
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var $status_codes = array();
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/**
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* The Request ID
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*
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* The request ID exists in the off chance that a packet is sent out-of-order. Of course, this library doesn't support
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* concurrent actions, so it's somewhat academic, here.
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*
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* @var Integer
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* @see Net_SFTP::_send_sftp_packet()
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* @access private
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*/
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var $request_id = false;
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/**
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* The Packet Type
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*
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* The request ID exists in the off chance that a packet is sent out-of-order. Of course, this library doesn't support
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* concurrent actions, so it's somewhat academic, here.
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*
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* @var Integer
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* @see Net_SFTP::_get_sftp_packet()
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* @access private
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*/
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var $packet_type = -1;
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/**
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* Packet Buffer
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*
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* @var String
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* @see Net_SFTP::_get_sftp_packet()
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* @access private
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*/
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var $packet_buffer = '';
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/**
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* Extensions supported by the server
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*
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* @var Array
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* @see Net_SFTP::_initChannel()
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* @access private
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*/
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var $extensions = array();
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/**
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* Server SFTP version
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*
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* @var Integer
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* @see Net_SFTP::_initChannel()
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* @access private
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*/
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var $version;
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/**
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* Current working directory
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*
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* @var String
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* @see Net_SFTP::_realpath()
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* @see Net_SFTP::chdir()
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* @access private
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*/
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var $pwd = false;
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/**
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* Packet Type Log
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*
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* @see Net_SFTP::getLog()
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* @var Array
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* @access private
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*/
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var $packet_type_log = array();
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/**
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* Packet Log
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*
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* @see Net_SFTP::getLog()
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* @var Array
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* @access private
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*/
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var $packet_log = array();
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/**
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* Error information
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*
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* @see Net_SFTP::getSFTPErrors()
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* @see Net_SFTP::getLastSFTPError()
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* @var String
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* @access private
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*/
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var $errors = array();
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/**
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* Default Constructor.
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*
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* Connects to an SFTP server
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*
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* @param String $host
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* @param optional Integer $port
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* @param optional Integer $timeout
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* @return Net_SFTP
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* @access public
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*/
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function Net_SFTP($host, $port = 22, $timeout = 10)
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{
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parent::Net_SSH2($host, $port, $timeout);
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$this->packet_types = array(
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1 => 'NET_SFTP_INIT',
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2 => 'NET_SFTP_VERSION',
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/* the format of SSH_FXP_OPEN changed between SFTPv4 and SFTPv5+:
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SFTPv5+: http://tools.ietf.org/html/draft-ietf-secsh-filexfer-13#section-8.1.1
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pre-SFTPv5 : http://tools.ietf.org/html/draft-ietf-secsh-filexfer-04#section-6.3 */
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3 => 'NET_SFTP_OPEN',
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4 => 'NET_SFTP_CLOSE',
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5 => 'NET_SFTP_READ',
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6 => 'NET_SFTP_WRITE',
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8 => 'NET_SFTP_FSTAT',
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9 => 'NET_SFTP_SETSTAT',
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11 => 'NET_SFTP_OPENDIR',
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12 => 'NET_SFTP_READDIR',
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13 => 'NET_SFTP_REMOVE',
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14 => 'NET_SFTP_MKDIR',
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15 => 'NET_SFTP_RMDIR',
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16 => 'NET_SFTP_REALPATH',
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17 => 'NET_SFTP_STAT',
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/* the format of SSH_FXP_RENAME changed between SFTPv4 and SFTPv5+:
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SFTPv5+: http://tools.ietf.org/html/draft-ietf-secsh-filexfer-13#section-8.3
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pre-SFTPv5 : http://tools.ietf.org/html/draft-ietf-secsh-filexfer-04#section-6.5 */
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18 => 'NET_SFTP_RENAME',
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101=> 'NET_SFTP_STATUS',
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102=> 'NET_SFTP_HANDLE',
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/* the format of SSH_FXP_NAME changed between SFTPv3 and SFTPv4+:
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SFTPv4+: http://tools.ietf.org/html/draft-ietf-secsh-filexfer-13#section-9.4
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pre-SFTPv4 : http://tools.ietf.org/html/draft-ietf-secsh-filexfer-02#section-7 */
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103=> 'NET_SFTP_DATA',
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104=> 'NET_SFTP_NAME',
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105=> 'NET_SFTP_ATTRS',
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200=> 'NET_SFTP_EXTENDED'
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);
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$this->status_codes = array(
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0 => 'NET_SFTP_STATUS_OK',
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1 => 'NET_SFTP_STATUS_EOF',
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2 => 'NET_SFTP_STATUS_NO_SUCH_FILE',
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3 => 'NET_SFTP_STATUS_PERMISSION_DENIED',
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4 => 'NET_SFTP_STATUS_FAILURE',
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5 => 'NET_SFTP_STATUS_BAD_MESSAGE',
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6 => 'NET_SFTP_STATUS_NO_CONNECTION',
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7 => 'NET_SFTP_STATUS_CONNECTION_LOST',
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8 => 'NET_SFTP_STATUS_OP_UNSUPPORTED'
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);
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// http://tools.ietf.org/html/draft-ietf-secsh-filexfer-13#section-7.1
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// the order, in this case, matters quite a lot - see Net_SFTP::_parseAttributes() to understand why
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$this->attributes = array(
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0x00000001 => 'NET_SFTP_ATTR_SIZE',
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0x00000002 => 'NET_SFTP_ATTR_UIDGID', // defined in SFTPv3, removed in SFTPv4+
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0x00000004 => 'NET_SFTP_ATTR_PERMISSIONS',
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0x00000008 => 'NET_SFTP_ATTR_ACCESSTIME',
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-1 => 'NET_SFTP_ATTR_EXTENDED' // unpack('N', "\xFF\xFF\xFF\xFF") == array(1 => int(-1))
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);
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// http://tools.ietf.org/html/draft-ietf-secsh-filexfer-04#section-6.3
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// the flag definitions change somewhat in SFTPv5+. if SFTPv5+ support is added to this library, maybe name
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// the array for that $this->open5_flags and similarily alter the constant names.
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$this->open_flags = array(
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0x00000001 => 'NET_SFTP_OPEN_READ',
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0x00000002 => 'NET_SFTP_OPEN_WRITE',
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0x00000008 => 'NET_SFTP_OPEN_CREATE',
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0x00000010 => 'NET_SFTP_OPEN_TRUNCATE'
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);
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$this->_define_array(
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$this->packet_types,
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$this->status_codes,
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$this->attributes,
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$this->open_flags
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);
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}
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/**
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* Login
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*
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* @param String $username
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* @param optional String $password
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* @return Boolean
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* @access public
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||||
*/
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function login($username, $password = '')
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{
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if (!parent::login($username, $password)) {
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return false;
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}
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$this->window_size_client_to_server[NET_SFTP_CHANNEL] = $this->window_size;
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$packet = pack('CNa*N3',
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NET_SSH2_MSG_CHANNEL_OPEN, strlen('session'), 'session', NET_SFTP_CHANNEL, $this->window_size, 0x4000);
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|
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if (!$this->_send_binary_packet($packet)) {
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return false;
|
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}
|
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|
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$this->channel_status[NET_SFTP_CHANNEL] = NET_SSH2_MSG_CHANNEL_OPEN;
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$response = $this->_get_channel_packet(NET_SFTP_CHANNEL);
|
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if ($response === false) {
|
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return false;
|
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}
|
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|
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$packet = pack('CNNa*CNa*',
|
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NET_SSH2_MSG_CHANNEL_REQUEST, $this->server_channels[NET_SFTP_CHANNEL], strlen('subsystem'), 'subsystem', 1, strlen('sftp'), 'sftp');
|
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if (!$this->_send_binary_packet($packet)) {
|
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return false;
|
||||
}
|
||||
|
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$this->channel_status[NET_SFTP_CHANNEL] = NET_SSH2_MSG_CHANNEL_REQUEST;
|
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|
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$response = $this->_get_channel_packet(NET_SFTP_CHANNEL);
|
||||
if ($response === false) {
|
||||
return false;
|
||||
}
|
||||
|
||||
$this->channel_status[NET_SFTP_CHANNEL] = NET_SSH2_MSG_CHANNEL_DATA;
|
||||
|
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if (!$this->_send_sftp_packet(NET_SFTP_INIT, "\0\0\0\3")) {
|
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return false;
|
||||
}
|
||||
|
||||
$response = $this->_get_sftp_packet();
|
||||
if ($this->packet_type != NET_SFTP_VERSION) {
|
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user_error('Expected SSH_FXP_VERSION', E_USER_NOTICE);
|
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return false;
|
||||
}
|
||||
|
||||
extract(unpack('Nversion', $this->_string_shift($response, 4)));
|
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$this->version = $version;
|
||||
while (!empty($response)) {
|
||||
extract(unpack('Nlength', $this->_string_shift($response, 4)));
|
||||
$key = $this->_string_shift($response, $length);
|
||||
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']);
|
||||
}
|
||||
*/
|
||||
|
||||
$this->request_id = 1;
|
||||
|
||||
/*
|
||||
A Note on SFTPv4/5/6 support:
|
||||
<http://tools.ietf.org/html/draft-ietf-secsh-filexfer-13#section-5.1> states the following:
|
||||
|
||||
"If the client wishes to interoperate with servers that support noncontiguous version
|
||||
numbers it SHOULD send '3'"
|
||||
|
||||
Given that the server only sends its version number after the client has already done so, the above
|
||||
seems to be suggesting that v3 should be the default version. This makes sense given that v3 is the
|
||||
most popular.
|
||||
|
||||
<http://tools.ietf.org/html/draft-ietf-secsh-filexfer-13#section-5.5> states the following;
|
||||
|
||||
"If the server did not send the "versions" extension, or the version-from-list was not included, the
|
||||
server MAY send a status response describing the failure, but MUST then close the channel without
|
||||
processing any further requests."
|
||||
|
||||
So what do you do if you have a client whose initial SSH_FXP_INIT packet says it implements v3 and
|
||||
a server whose initial SSH_FXP_VERSION reply says it implements v4 and only v4? If it only implements
|
||||
v4, the "versions" extension is likely not going to have been sent so version re-negotiation as discussed
|
||||
in draft-ietf-secsh-filexfer-13 would be quite impossible. As such, what Net_SFTP would do is close the
|
||||
channel and reopen it with a new and updated SSH_FXP_INIT packet.
|
||||
*/
|
||||
if ($this->version != 3) {
|
||||
return false;
|
||||
}
|
||||
|
||||
$this->pwd = $this->_realpath('.');
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the current directory name
|
||||
*
|
||||
* @return Mixed
|
||||
* @access public
|
||||
*/
|
||||
function pwd()
|
||||
{
|
||||
return $this->pwd;
|
||||
}
|
||||
|
||||
/**
|
||||
* 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 $mode is set to NET_SFTP_CONFIRM_DIR (as opposed to NET_SFTP_CONFIRM_NONE,
|
||||
* which is what it is set to by default), false is returned if $dir is not a valid directory.
|
||||
*
|
||||
* @see Net_SFTP::chdir()
|
||||
* @param String $dir
|
||||
* @param optional Integer $mode
|
||||
* @return Mixed
|
||||
* @access private
|
||||
*/
|
||||
function _realpath($dir)
|
||||
{
|
||||
/*
|
||||
"This protocol represents file names as strings. File names are
|
||||
assumed to use the slash ('/') character as a directory separator.
|
||||
|
||||
File names starting with a slash are "absolute", and are relative to
|
||||
the root of the file system. Names starting with any other character
|
||||
are relative to the user's default directory (home directory). Note
|
||||
that identifying the user is assumed to take place outside of this
|
||||
protocol."
|
||||
|
||||
-- http://tools.ietf.org/html/draft-ietf-secsh-filexfer-13#section-6
|
||||
*/
|
||||
$file = '';
|
||||
if ($this->pwd !== false) {
|
||||
// if the SFTP server returned the canonicalized path even for non-existant files this wouldn't be necessary
|
||||
// on OpenSSH it isn't necessary but on other SFTP servers it is. that and since the specs say nothing on
|
||||
// the subject, we'll go ahead and work around it with the following.
|
||||
if ($dir[strlen($dir) - 1] != '/') {
|
||||
$file = basename($dir);
|
||||
$dir = dirname($dir);
|
||||
}
|
||||
|
||||
if ($dir == '.' || $dir == $this->pwd) {
|
||||
return $this->pwd . $file;
|
||||
}
|
||||
|
||||
if ($dir[0] != '/') {
|
||||
$dir = $this->pwd . '/' . $dir;
|
||||
}
|
||||
// on the surface it seems like maybe resolving a path beginning with / is unnecessary, but such paths
|
||||
// can contain .'s and ..'s just like any other. we could parse those out as appropriate or we can let
|
||||
// the server do it. we'll do the latter.
|
||||
}
|
||||
|
||||
/*
|
||||
that SSH_FXP_REALPATH returns SSH_FXP_NAME does not necessarily mean that anything actually exists at the
|
||||
specified path. generally speaking, no attributes are returned with this particular SSH_FXP_NAME packet
|
||||
regardless of whether or not a file actually exists. and in SFTPv3, the longname field and the filename
|
||||
field match for this particular SSH_FXP_NAME packet. for other SSH_FXP_NAME packets, this will likely
|
||||
not be the case, but for this one, it is.
|
||||
*/
|
||||
// http://tools.ietf.org/html/draft-ietf-secsh-filexfer-13#section-8.9
|
||||
if (!$this->_send_sftp_packet(NET_SFTP_REALPATH, pack('Na*', strlen($dir), $dir))) {
|
||||
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
|
||||
extract(unpack('Nlength', $this->_string_shift($response, 4)));
|
||||
$realpath = $this->_string_shift($response, $length);
|
||||
break;
|
||||
case NET_SFTP_STATUS:
|
||||
extract(unpack('Nstatus/Nlength', $this->_string_shift($response, 8)));
|
||||
$this->sftp_errors[] = $this->status_codes[$status] . ': ' . $this->_string_shift($response, $length);
|
||||
return false;
|
||||
default:
|
||||
user_error('Expected SSH_FXP_NAME or SSH_FXP_STATUS', E_USER_NOTICE);
|
||||
return false;
|
||||
}
|
||||
|
||||
// if $this->pwd isn't set than the only thing $realpath could be is for '.', which is pretty much guaranteed to
|
||||
// be a bonafide directory
|
||||
return $realpath . '/' . $file;
|
||||
}
|
||||
|
||||
/**
|
||||
* Changes the current directory
|
||||
*
|
||||
* @param String $dir
|
||||
* @return Boolean
|
||||
* @access public
|
||||
*/
|
||||
function chdir($dir)
|
||||
{
|
||||
if (!($this->bitmap & NET_SSH2_MASK_LOGIN)) {
|
||||
return false;
|
||||
}
|
||||
|
||||
if ($dir[strlen($dir) - 1] != '/') {
|
||||
$dir.= '/';
|
||||
}
|
||||
$dir = $this->_realpath($dir);
|
||||
|
||||
// confirm that $dir is, in fact, a valid directory
|
||||
if (!$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:
|
||||
extract(unpack('Nstatus/Nlength', $this->_string_shift($response, 8)));
|
||||
$this->sftp_errors[] = $this->status_codes[$status] . ': ' . $this->_string_shift($response, $length);
|
||||
return false;
|
||||
default:
|
||||
user_error('Expected SSH_FXP_HANDLE or SSH_FXP_STATUS', E_USER_NOTICE);
|
||||
return false;
|
||||
}
|
||||
|
||||
if (!$this->_send_sftp_packet(NET_SFTP_CLOSE, pack('Na*', strlen($handle), $handle))) {
|
||||
return false;
|
||||
}
|
||||
|
||||
$response = $this->_get_sftp_packet();
|
||||
if ($this->packet_type != NET_SFTP_STATUS) {
|
||||
user_error('Expected SSH_FXP_STATUS', E_USER_NOTICE);
|
||||
return false;
|
||||
}
|
||||
|
||||
extract(unpack('Nstatus', $this->_string_shift($response, 4)));
|
||||
if ($status != NET_SFTP_STATUS_OK) {
|
||||
extract(unpack('Nlength', $this->_string_shift($response, 4)));
|
||||
$this->sftp_errors[] = $this->status_codes[$status] . ': ' . $this->_string_shift($response, $length);
|
||||
return false;
|
||||
}
|
||||
|
||||
$this->pwd = $dir;
|
||||
return true;
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns a list of files in the given directory
|
||||
*
|
||||
* @param optional String $dir
|
||||
* @return Mixed
|
||||
* @access public
|
||||
*/
|
||||
function nlist($dir = '.')
|
||||
{
|
||||
return $this->_list($dir, false);
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns a list of files in the given directory
|
||||
*
|
||||
* @param optional String $dir
|
||||
* @return Mixed
|
||||
* @access public
|
||||
*/
|
||||
function rawlist($dir = '.')
|
||||
{
|
||||
return $this->_list($dir, true);
|
||||
}
|
||||
|
||||
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
|
||||
extract(unpack('Nstatus/Nlength', $this->_string_shift($response, 8)));
|
||||
$this->sftp_errors[] = $this->status_codes[$status] . ': ' . $this->_string_shift($response, $length);
|
||||
return false;
|
||||
default:
|
||||
user_error('Expected SSH_FXP_HANDLE or SSH_FXP_STATUS', E_USER_NOTICE);
|
||||
return false;
|
||||
}
|
||||
|
||||
$contents = array();
|
||||
while (true) {
|
||||
// http://tools.ietf.org/html/draft-ietf-secsh-filexfer-13#section-8.2.2
|
||||
// why multiple SSH_FXP_READDIR packets would be sent when the response to a single one can span arbitrarily many
|
||||
// SSH_MSG_CHANNEL_DATA messages is not known to me.
|
||||
if (!$this->_send_sftp_packet(NET_SFTP_READDIR, pack('Na*', strlen($handle), $handle))) {
|
||||
return false;
|
||||
}
|
||||
|
||||
$response = $this->_get_sftp_packet();
|
||||
switch ($this->packet_type) {
|
||||
case NET_SFTP_NAME:
|
||||
extract(unpack('Ncount', $this->_string_shift($response, 4)));
|
||||
for ($i = 0; $i < $count; $i++) {
|
||||
extract(unpack('Nlength', $this->_string_shift($response, 4)));
|
||||
$shortname = $this->_string_shift($response, $length);
|
||||
extract(unpack('Nlength', $this->_string_shift($response, 4)));
|
||||
$this->_string_shift($response, $length); // SFTPv4+ drop this field - the "longname" field
|
||||
$attributes = $this->_parseAttributes($response); // we also don't care about the attributes
|
||||
if (!$raw) {
|
||||
$contents[] = $shortname;
|
||||
} else {
|
||||
$contents[$shortname] = $attributes;
|
||||
}
|
||||
// SFTPv6 has an optional boolean end-of-list field, but we'll ignore that, since the
|
||||
// final SSH_FXP_STATUS packet should tell us that, already.
|
||||
}
|
||||
break;
|
||||
case NET_SFTP_STATUS:
|
||||
extract(unpack('Nstatus', $this->_string_shift($response, 4)));
|
||||
if ($status != NET_SFTP_STATUS_EOF) {
|
||||
extract(unpack('Nlength', $this->_string_shift($response, 4)));
|
||||
$this->sftp_errors[] = $this->status_codes[$status] . ': ' . $this->_string_shift($response, $length);
|
||||
return false;
|
||||
}
|
||||
break 2;
|
||||
default:
|
||||
user_error('Expected SSH_FXP_NAME or SSH_FXP_STATUS', E_USER_NOTICE);
|
||||
return false;
|
||||
}
|
||||
}
|
||||
|
||||
if (!$this->_send_sftp_packet(NET_SFTP_CLOSE, pack('Na*', strlen($handle), $handle))) {
|
||||
return false;
|
||||
}
|
||||
|
||||
// "The client MUST release all resources associated with the handle regardless of the status."
|
||||
// -- http://tools.ietf.org/html/draft-ietf-secsh-filexfer-13#section-8.1.3
|
||||
$response = $this->_get_sftp_packet();
|
||||
if ($this->packet_type != NET_SFTP_STATUS) {
|
||||
user_error('Expected SSH_FXP_STATUS', E_USER_NOTICE);
|
||||
return false;
|
||||
}
|
||||
|
||||
extract(unpack('Nstatus', $this->_string_shift($response, 4)));
|
||||
if ($status != NET_SFTP_STATUS_OK) {
|
||||
extract(unpack('Nlength', $this->_string_shift($response, 4)));
|
||||
$this->sftp_errors[] = $this->status_codes[$status] . ': ' . $this->_string_shift($response, $length);
|
||||
return false;
|
||||
}
|
||||
|
||||
return $contents;
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the file size, in bytes, or false, on failure
|
||||
*
|
||||
* Files larger than 4GB will show up as being exactly 4GB.
|
||||
*
|
||||
* @param optional String $dir
|
||||
* @return Mixed
|
||||
* @access public
|
||||
*/
|
||||
function size($filename)
|
||||
{
|
||||
if (!($this->bitmap & NET_SSH2_MASK_LOGIN)) {
|
||||
return false;
|
||||
}
|
||||
|
||||
$filename = $this->_realpath($filename);
|
||||
if ($filename === false) {
|
||||
return false;
|
||||
}
|
||||
|
||||
// SFTPv4+ adds an additional 32-bit integer field - flags - to the following:
|
||||
$packet = pack('Na*', strlen($filename), $filename);
|
||||
if (!$this->_send_sftp_packet(NET_SFTP_STAT, $packet)) {
|
||||
return false;
|
||||
}
|
||||
|
||||
$response = $this->_get_sftp_packet();
|
||||
switch ($this->packet_type) {
|
||||
case NET_SFTP_ATTRS:
|
||||
$attrs = $this->_parseAttributes($response);
|
||||
return $attrs['size'];
|
||||
case NET_SFTP_STATUS:
|
||||
extract(unpack('Nstatus/Nlength', $this->_string_shift($response, 8)));
|
||||
$this->sftp_errors[] = $this->status_codes[$status] . ': ' . $this->_string_shift($response, $length);
|
||||
return false;
|
||||
}
|
||||
|
||||
user_error('Expected SSH_FXP_ATTRS or SSH_FXP_STATUS', E_USER_NOTICE);
|
||||
return false;
|
||||
}
|
||||
|
||||
/**
|
||||
* Set permissions on a file.
|
||||
*
|
||||
* Returns the new file permissions on success or FALSE on error.
|
||||
*
|
||||
* @param Integer $mode
|
||||
* @param String $filename
|
||||
* @return Mixed
|
||||
* @access public
|
||||
*/
|
||||
function chmod($mode, $filename)
|
||||
{
|
||||
if (!($this->bitmap & NET_SSH2_MASK_LOGIN)) {
|
||||
return false;
|
||||
}
|
||||
|
||||
$filename = $this->_realpath($filename);
|
||||
if ($filename === false) {
|
||||
return false;
|
||||
}
|
||||
|
||||
// SFTPv4+ has an additional byte field - type - that would need to be sent, as well. setting it to
|
||||
// SSH_FILEXFER_TYPE_UNKNOWN might work. if not, we'd have to do an SSH_FXP_STAT before doing an SSH_FXP_SETSTAT.
|
||||
$attr = pack('N2', NET_SFTP_ATTR_PERMISSIONS, $mode & 07777);
|
||||
if (!$this->_send_sftp_packet(NET_SFTP_SETSTAT, pack('Na*a*', strlen($filename), $filename, $attr))) {
|
||||
return false;
|
||||
}
|
||||
|
||||
/*
|
||||
"Because some systems must use separate system calls to set various attributes, it is possible that a failure
|
||||
response will be returned, but yet some of the attributes may be have been successfully modified. If possible,
|
||||
servers SHOULD avoid this situation; however, clients MUST be aware that this is possible."
|
||||
|
||||
-- http://tools.ietf.org/html/draft-ietf-secsh-filexfer-13#section-8.6
|
||||
*/
|
||||
$response = $this->_get_sftp_packet();
|
||||
if ($this->packet_type != NET_SFTP_STATUS) {
|
||||
user_error('Expected SSH_FXP_STATUS', E_USER_NOTICE);
|
||||
return false;
|
||||
}
|
||||
|
||||
extract(unpack('Nstatus', $this->_string_shift($response, 4)));
|
||||
if ($status != NET_SFTP_STATUS_EOF) {
|
||||
extract(unpack('Nlength', $this->_string_shift($response, 4)));
|
||||
$this->sftp_errors[] = $this->status_codes[$status] . ': ' . $this->_string_shift($response, $length);
|
||||
}
|
||||
|
||||
// rather than return what the permissions *should* be, we'll return what they actually are. this will also
|
||||
// tell us if the file actually exists.
|
||||
// incidentally, SFTPv4+ adds an additional 32-bit integer field - flags - to the following:
|
||||
$packet = pack('Na*', strlen($filename), $filename);
|
||||
if (!$this->_send_sftp_packet(NET_SFTP_STAT, $packet)) {
|
||||
return false;
|
||||
}
|
||||
|
||||
$response = $this->_get_sftp_packet();
|
||||
switch ($this->packet_type) {
|
||||
case NET_SFTP_ATTRS:
|
||||
$attrs = $this->_parseAttributes($response);
|
||||
return $attrs['permissions'];
|
||||
case NET_SFTP_STATUS:
|
||||
extract(unpack('Nstatus/Nlength', $this->_string_shift($response, 8)));
|
||||
$this->sftp_errors[] = $this->status_codes[$status] . ': ' . $this->_string_shift($response, $length);
|
||||
return false;
|
||||
}
|
||||
|
||||
user_error('Expected SSH_FXP_ATTRS or SSH_FXP_STATUS', E_USER_NOTICE);
|
||||
return false;
|
||||
}
|
||||
|
||||
/**
|
||||
* Creates a directory.
|
||||
*
|
||||
* @param String $dir
|
||||
* @return Boolean
|
||||
* @access public
|
||||
*/
|
||||
function mkdir($dir)
|
||||
{
|
||||
if (!($this->bitmap & NET_SSH2_MASK_LOGIN)) {
|
||||
return false;
|
||||
}
|
||||
|
||||
$dir = $this->_realpath(rtrim($dir, '/'));
|
||||
if ($dir === false) {
|
||||
return false;
|
||||
}
|
||||
|
||||
// by not providing any permissions, hopefully the server will use the logged in users umask - their
|
||||
// default permissions.
|
||||
if (!$this->_send_sftp_packet(NET_SFTP_MKDIR, pack('Na*N', strlen($dir), $dir, 0))) {
|
||||
return false;
|
||||
}
|
||||
|
||||
$response = $this->_get_sftp_packet();
|
||||
if ($this->packet_type != NET_SFTP_STATUS) {
|
||||
user_error('Expected SSH_FXP_STATUS', E_USER_NOTICE);
|
||||
return false;
|
||||
}
|
||||
|
||||
extract(unpack('Nstatus', $this->_string_shift($response, 4)));
|
||||
if ($status != NET_SFTP_STATUS_OK) {
|
||||
extract(unpack('Nlength', $this->_string_shift($response, 4)));
|
||||
$this->sftp_errors[] = $this->status_codes[$status] . ': ' . $this->_string_shift($response, $length);
|
||||
return false;
|
||||
}
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
/**
|
||||
* Removes a directory.
|
||||
*
|
||||
* @param String $dir
|
||||
* @return Boolean
|
||||
* @access public
|
||||
*/
|
||||
function rmdir($dir)
|
||||
{
|
||||
if (!($this->bitmap & NET_SSH2_MASK_LOGIN)) {
|
||||
return false;
|
||||
}
|
||||
|
||||
$dir = $this->_realpath($dir);
|
||||
if ($dir === false) {
|
||||
return false;
|
||||
}
|
||||
|
||||
if (!$this->_send_sftp_packet(NET_SFTP_RMDIR, pack('Na*', strlen($dir), $dir))) {
|
||||
return false;
|
||||
}
|
||||
|
||||
$response = $this->_get_sftp_packet();
|
||||
if ($this->packet_type != NET_SFTP_STATUS) {
|
||||
user_error('Expected SSH_FXP_STATUS', E_USER_NOTICE);
|
||||
return false;
|
||||
}
|
||||
|
||||
extract(unpack('Nstatus', $this->_string_shift($response, 4)));
|
||||
if ($status != NET_SFTP_STATUS_OK) {
|
||||
// presumably SSH_FX_NO_SUCH_FILE or SSH_FX_PERMISSION_DENIED?
|
||||
extract(unpack('Nlength', $this->_string_shift($response, 4)));
|
||||
$this->sftp_errors[] = $this->status_codes[$status] . ': ' . $this->_string_shift($response, $length);
|
||||
return false;
|
||||
}
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
/**
|
||||
* Uploads a file to the SFTP server.
|
||||
*
|
||||
* By default, Net_SFTP::put() does not read from the local filesystem. $data is dumped directly into $remote_file.
|
||||
* So, for example, if you set $data to 'filename.ext' and then do Net_SFTP::get(), you will get a file, twelve bytes
|
||||
* long, containing 'filename.ext' as its contents.
|
||||
*
|
||||
* Setting $mode to NET_SFTP_LOCAL_FILE will change the above behavior. With NET_SFTP_LOCAL_FILE, $remote_file will
|
||||
* contain as many bytes as filename.ext does on your local filesystem. If your filename.ext is 1MB then that is how
|
||||
* large $remote_file will be, as well.
|
||||
*
|
||||
* Currently, only binary mode is supported. As such, if the line endings need to be adjusted, you will need to take
|
||||
* care of that, yourself.
|
||||
*
|
||||
* @param String $remote_file
|
||||
* @param String $data
|
||||
* @param optional Integer $flags
|
||||
* @return Boolean
|
||||
* @access public
|
||||
* @internal ASCII mode for SFTPv4/5/6 can be supported by adding a new function - Net_SFTP::setMode().
|
||||
*/
|
||||
function put($remote_file, $data, $mode = NET_SFTP_STRING)
|
||||
{
|
||||
if (!($this->bitmap & NET_SSH2_MASK_LOGIN)) {
|
||||
return false;
|
||||
}
|
||||
|
||||
$remote_file = $this->_realpath($remote_file);
|
||||
if ($remote_file === false) {
|
||||
return false;
|
||||
}
|
||||
|
||||
$packet = pack('Na*N2', strlen($remote_file), $remote_file, NET_SFTP_OPEN_WRITE | NET_SFTP_OPEN_CREATE | NET_SFTP_OPEN_TRUNCATE, 0);
|
||||
if (!$this->_send_sftp_packet(NET_SFTP_OPEN, $packet)) {
|
||||
return false;
|
||||
}
|
||||
|
||||
$response = $this->_get_sftp_packet();
|
||||
switch ($this->packet_type) {
|
||||
case NET_SFTP_HANDLE:
|
||||
$handle = substr($response, 4);
|
||||
break;
|
||||
case NET_SFTP_STATUS:
|
||||
extract(unpack('Nstatus/Nlength', $this->_string_shift($response, 8)));
|
||||
$this->sftp_errors[] = $this->status_codes[$status] . ': ' . $this->_string_shift($response, $length);
|
||||
return false;
|
||||
default:
|
||||
user_error('Expected SSH_FXP_HANDLE or SSH_FXP_STATUS', E_USER_NOTICE);
|
||||
return false;
|
||||
}
|
||||
|
||||
$initialize = true;
|
||||
|
||||
// http://tools.ietf.org/html/draft-ietf-secsh-filexfer-13#section-8.2.3
|
||||
if ($mode == NET_SFTP_LOCAL_FILE) {
|
||||
if (!is_file($data)) {
|
||||
user_error("$data is not a valid file", E_USER_NOTICE);
|
||||
return false;
|
||||
}
|
||||
$fp = fopen($data, 'rb');
|
||||
if (!$fp) {
|
||||
return false;
|
||||
}
|
||||
$sent = 0;
|
||||
$size = filesize($data);
|
||||
} else {
|
||||
$sent = 0;
|
||||
$size = strlen($data);
|
||||
}
|
||||
|
||||
$size = $size < 0 ? ($size & 0x7FFFFFFF) + 0x80000000 : $size;
|
||||
|
||||
$sftp_packet_size = 34000; // PuTTY uses 4096
|
||||
$i = 0;
|
||||
while ($sent < $size) {
|
||||
$temp = $mode == NET_SFTP_LOCAL_FILE ? fread($fp, $sftp_packet_size) : $this->_string_shift($data, $sftp_packet_size);
|
||||
$packet = pack('Na*N3a*', strlen($handle), $handle, 0, $sent, strlen($temp), $temp);
|
||||
if (!$this->_send_sftp_packet(NET_SFTP_WRITE, $packet)) {
|
||||
fclose($fp);
|
||||
return false;
|
||||
}
|
||||
$sent+= strlen($temp);
|
||||
|
||||
$i++;
|
||||
|
||||
if ($i == 50) {
|
||||
if (!$this->_read_put_responses($i)) {
|
||||
$i = 0;
|
||||
break;
|
||||
}
|
||||
$i = 0;
|
||||
}
|
||||
}
|
||||
|
||||
$this->_read_put_responses($i);
|
||||
|
||||
if ($mode == NET_SFTP_LOCAL_FILE) {
|
||||
fclose($fp);
|
||||
}
|
||||
|
||||
if (!$this->_send_sftp_packet(NET_SFTP_CLOSE, pack('Na*', strlen($handle), $handle))) {
|
||||
return false;
|
||||
}
|
||||
|
||||
$response = $this->_get_sftp_packet();
|
||||
if ($this->packet_type != NET_SFTP_STATUS) {
|
||||
user_error('Expected SSH_FXP_STATUS', E_USER_NOTICE);
|
||||
return false;
|
||||
}
|
||||
|
||||
extract(unpack('Nstatus', $this->_string_shift($response, 4)));
|
||||
if ($status != NET_SFTP_STATUS_OK) {
|
||||
extract(unpack('Nlength', $this->_string_shift($response, 4)));
|
||||
$this->sftp_errors[] = $this->status_codes[$status] . ': ' . $this->_string_shift($response, $length);
|
||||
return false;
|
||||
}
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
/**
|
||||
* Reads multiple successive SSH_FXP_WRITE responses
|
||||
*
|
||||
* Sending an SSH_FXP_WRITE packet and immediately reading its response isn't as efficient as blindly sending out $i
|
||||
* SSH_FXP_WRITEs, in succession, and then reading $i responses.
|
||||
*
|
||||
* @param Integer $i
|
||||
* @return Boolean
|
||||
* @access private
|
||||
*/
|
||||
function _read_put_responses($i)
|
||||
{
|
||||
while ($i--) {
|
||||
$response = $this->_get_sftp_packet();
|
||||
if ($this->packet_type != NET_SFTP_STATUS) {
|
||||
user_error('Expected SSH_FXP_STATUS', E_USER_NOTICE);
|
||||
return false;
|
||||
}
|
||||
|
||||
extract(unpack('Nstatus', $this->_string_shift($response, 4)));
|
||||
if ($status != NET_SFTP_STATUS_OK) {
|
||||
extract(unpack('Nlength', $this->_string_shift($response, 4)));
|
||||
$this->sftp_errors[] = $this->status_codes[$status] . ': ' . $this->_string_shift($response, $length);
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
return $i < 0;
|
||||
}
|
||||
|
||||
/**
|
||||
* Downloads a file from the SFTP server.
|
||||
*
|
||||
* Returns a string containing the contents of $remote_file if $local_file is left undefined or a boolean false if
|
||||
* the operation was unsuccessful. If $local_file is defined, returns true or false depending on the success of the
|
||||
* operation
|
||||
*
|
||||
* @param String $remote_file
|
||||
* @param optional String $local_file
|
||||
* @return Mixed
|
||||
* @access public
|
||||
*/
|
||||
function get($remote_file, $local_file = false)
|
||||
{
|
||||
if (!($this->bitmap & NET_SSH2_MASK_LOGIN)) {
|
||||
return false;
|
||||
}
|
||||
|
||||
$remote_file = $this->_realpath($remote_file);
|
||||
if ($remote_file === false) {
|
||||
return false;
|
||||
}
|
||||
|
||||
$packet = pack('Na*N2', strlen($remote_file), $remote_file, NET_SFTP_OPEN_READ, 0);
|
||||
if (!$this->_send_sftp_packet(NET_SFTP_OPEN, $packet)) {
|
||||
return false;
|
||||
}
|
||||
|
||||
$response = $this->_get_sftp_packet();
|
||||
switch ($this->packet_type) {
|
||||
case NET_SFTP_HANDLE:
|
||||
$handle = substr($response, 4);
|
||||
break;
|
||||
case NET_SFTP_STATUS: // presumably SSH_FX_NO_SUCH_FILE or SSH_FX_PERMISSION_DENIED
|
||||
extract(unpack('Nstatus/Nlength', $this->_string_shift($response, 8)));
|
||||
$this->sftp_errors[] = $this->status_codes[$status] . ': ' . $this->_string_shift($response, $length);
|
||||
return false;
|
||||
default:
|
||||
user_error('Expected SSH_FXP_HANDLE or SSH_FXP_STATUS', E_USER_NOTICE);
|
||||
return false;
|
||||
}
|
||||
|
||||
$packet = pack('Na*', strlen($handle), $handle);
|
||||
if (!$this->_send_sftp_packet(NET_SFTP_FSTAT, $packet)) {
|
||||
return false;
|
||||
}
|
||||
|
||||
$response = $this->_get_sftp_packet();
|
||||
switch ($this->packet_type) {
|
||||
case NET_SFTP_ATTRS:
|
||||
$attrs = $this->_parseAttributes($response);
|
||||
break;
|
||||
case NET_SFTP_STATUS:
|
||||
extract(unpack('Nstatus/Nlength', $this->_string_shift($response, 8)));
|
||||
$this->sftp_errors[] = $this->status_codes[$status] . ': ' . $this->_string_shift($response, $length);
|
||||
return false;
|
||||
default:
|
||||
user_error('Expected SSH_FXP_ATTRS or SSH_FXP_STATUS', E_USER_NOTICE);
|
||||
return false;
|
||||
}
|
||||
|
||||
if ($local_file !== false) {
|
||||
$fp = fopen($local_file, 'wb');
|
||||
if (!$fp) {
|
||||
return false;
|
||||
}
|
||||
} else {
|
||||
$content = '';
|
||||
}
|
||||
|
||||
$read = 0;
|
||||
while ($read < $attrs['size']) {
|
||||
$packet = pack('Na*N3', strlen($handle), $handle, 0, $read, 1 << 20);
|
||||
if (!$this->_send_sftp_packet(NET_SFTP_READ, $packet)) {
|
||||
return false;
|
||||
}
|
||||
|
||||
$response = $this->_get_sftp_packet();
|
||||
switch ($this->packet_type) {
|
||||
case NET_SFTP_DATA:
|
||||
$temp = substr($response, 4);
|
||||
$read+= strlen($temp);
|
||||
if ($local_file === false) {
|
||||
$content.= $temp;
|
||||
} else {
|
||||
fputs($fp, $temp);
|
||||
}
|
||||
break;
|
||||
case NET_SFTP_STATUS:
|
||||
extract(unpack('Nstatus/Nlength', $this->_string_shift($response, 8)));
|
||||
$this->sftp_errors[] = $this->status_codes[$status] . ': ' . $this->_string_shift($response, $length);
|
||||
break 2;
|
||||
default:
|
||||
user_error('Expected SSH_FXP_DATA or SSH_FXP_STATUS', E_USER_NOTICE);
|
||||
return false;
|
||||
}
|
||||
}
|
||||
|
||||
if (!$this->_send_sftp_packet(NET_SFTP_CLOSE, pack('Na*', strlen($handle), $handle))) {
|
||||
return false;
|
||||
}
|
||||
|
||||
$response = $this->_get_sftp_packet();
|
||||
if ($this->packet_type != NET_SFTP_STATUS) {
|
||||
user_error('Expected SSH_FXP_STATUS', E_USER_NOTICE);
|
||||
return false;
|
||||
}
|
||||
|
||||
extract(unpack('Nstatus', $this->_string_shift($response, 4)));
|
||||
if ($status != NET_SFTP_STATUS_OK) {
|
||||
extract(unpack('Nlength', $this->_string_shift($response, 4)));
|
||||
$this->sftp_errors[] = $this->status_codes[$status] . ': ' . $this->_string_shift($response, $length);
|
||||
return false;
|
||||
}
|
||||
|
||||
if (isset($content)) {
|
||||
return $content;
|
||||
}
|
||||
|
||||
fclose($fp);
|
||||
return true;
|
||||
}
|
||||
|
||||
/**
|
||||
* Deletes a file on the SFTP server.
|
||||
*
|
||||
* @param String $path
|
||||
* @return Boolean
|
||||
* @access public
|
||||
*/
|
||||
function delete($path)
|
||||
{
|
||||
if (!($this->bitmap & NET_SSH2_MASK_LOGIN)) {
|
||||
return false;
|
||||
}
|
||||
|
||||
$remote_file = $this->_realpath($path);
|
||||
if ($path === false) {
|
||||
return false;
|
||||
}
|
||||
|
||||
// http://tools.ietf.org/html/draft-ietf-secsh-filexfer-13#section-8.3
|
||||
if (!$this->_send_sftp_packet(NET_SFTP_REMOVE, pack('Na*', strlen($path), $path))) {
|
||||
return false;
|
||||
}
|
||||
|
||||
$response = $this->_get_sftp_packet();
|
||||
if ($this->packet_type != NET_SFTP_STATUS) {
|
||||
user_error('Expected SSH_FXP_STATUS', E_USER_NOTICE);
|
||||
return false;
|
||||
}
|
||||
|
||||
// if $status isn't SSH_FX_OK it's probably SSH_FX_NO_SUCH_FILE or SSH_FX_PERMISSION_DENIED
|
||||
extract(unpack('Nstatus', $this->_string_shift($response, 4)));
|
||||
if ($status != NET_SFTP_STATUS_OK) {
|
||||
extract(unpack('Nlength', $this->_string_shift($response, 4)));
|
||||
$this->sftp_errors[] = $this->status_codes[$status] . ': ' . $this->_string_shift($response, $length);
|
||||
return false;
|
||||
}
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
/**
|
||||
* Renames a file or a directory on the SFTP server
|
||||
*
|
||||
* @param String $oldname
|
||||
* @param String $newname
|
||||
* @return Boolean
|
||||
* @access public
|
||||
*/
|
||||
function rename($oldname, $newname)
|
||||
{
|
||||
if (!($this->bitmap & NET_SSH2_MASK_LOGIN)) {
|
||||
return false;
|
||||
}
|
||||
|
||||
$oldname = $this->_realpath($oldname);
|
||||
$newname = $this->_realpath($newname);
|
||||
if ($oldname === false || $newname === false) {
|
||||
return false;
|
||||
}
|
||||
|
||||
// http://tools.ietf.org/html/draft-ietf-secsh-filexfer-13#section-8.3
|
||||
$packet = pack('Na*Na*', strlen($oldname), $oldname, strlen($newname), $newname);
|
||||
if (!$this->_send_sftp_packet(NET_SFTP_RENAME, $packet)) {
|
||||
return false;
|
||||
}
|
||||
|
||||
$response = $this->_get_sftp_packet();
|
||||
if ($this->packet_type != NET_SFTP_STATUS) {
|
||||
user_error('Expected SSH_FXP_STATUS', E_USER_NOTICE);
|
||||
return false;
|
||||
}
|
||||
|
||||
// if $status isn't SSH_FX_OK it's probably SSH_FX_NO_SUCH_FILE or SSH_FX_PERMISSION_DENIED
|
||||
extract(unpack('Nstatus', $this->_string_shift($response, 4)));
|
||||
if ($status != NET_SFTP_STATUS_OK) {
|
||||
extract(unpack('Nlength', $this->_string_shift($response, 4)));
|
||||
$this->sftp_errors[] = $this->status_codes[$status] . ': ' . $this->_string_shift($response, $length);
|
||||
return false;
|
||||
}
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
/**
|
||||
* Parse Attributes
|
||||
*
|
||||
* See '7. File Attributes' of draft-ietf-secsh-filexfer-13 for more info.
|
||||
*
|
||||
* @param String $response
|
||||
* @return Array
|
||||
* @access private
|
||||
*/
|
||||
function _parseAttributes(&$response)
|
||||
{
|
||||
$attr = array();
|
||||
extract(unpack('Nflags', $this->_string_shift($response, 4)));
|
||||
// SFTPv4+ have a type field (a byte) that follows the above flag field
|
||||
foreach ($this->attributes as $key => $value) {
|
||||
switch ($flags & $key) {
|
||||
case NET_SFTP_ATTR_SIZE: // 0x00000001
|
||||
// size is represented by a 64-bit integer, so we perhaps ought to be doing the following:
|
||||
// $attr['size'] = new Math_BigInteger($this->_string_shift($response, 8), 256);
|
||||
// of course, you shouldn't be using Net_SFTP to transfer files that are in excess of 4GB
|
||||
// (0xFFFFFFFF bytes), anyway. as such, we'll just represent all file sizes that are bigger than
|
||||
// 4GB as being 4GB.
|
||||
extract(unpack('Nupper/Nsize', $this->_string_shift($response, 8)));
|
||||
if ($upper) {
|
||||
$attr['size'] = 0xFFFFFFFF;
|
||||
} else {
|
||||
$attr['size'] = $size < 0 ? ($size & 0x7FFFFFFF) + 0x80000000 : $size;
|
||||
}
|
||||
break;
|
||||
case NET_SFTP_ATTR_UIDGID: // 0x00000002 (SFTPv3 only)
|
||||
$attr+= unpack('Nuid/Ngid', $this->_string_shift($response, 8));
|
||||
break;
|
||||
case NET_SFTP_ATTR_PERMISSIONS: // 0x00000004
|
||||
$attr+= unpack('Npermissions', $this->_string_shift($response, 4));
|
||||
break;
|
||||
case NET_SFTP_ATTR_ACCESSTIME: // 0x00000008
|
||||
$attr+= unpack('Natime/Nmtime', $this->_string_shift($response, 8));
|
||||
break;
|
||||
case NET_SFTP_ATTR_EXTENDED: // 0x80000000
|
||||
extract(unpack('Ncount', $this->_string_shift($response, 4)));
|
||||
for ($i = 0; $i < $count; $i++) {
|
||||
extract(unpack('Nlength', $this->_string_shift($response, 4)));
|
||||
$key = $this->_string_shift($response, $length);
|
||||
extract(unpack('Nlength', $this->_string_shift($response, 4)));
|
||||
$attr[$key] = $this->_string_shift($response, $length);
|
||||
}
|
||||
}
|
||||
}
|
||||
return $attr;
|
||||
}
|
||||
|
||||
/**
|
||||
* Sends SFTP Packets
|
||||
*
|
||||
* See '6. General Packet Format' of draft-ietf-secsh-filexfer-13 for more info.
|
||||
*
|
||||
* @param Integer $type
|
||||
* @param String $data
|
||||
* @see Net_SFTP::_get_sftp_packet()
|
||||
* @see Net_SSH2::_send_channel_packet()
|
||||
* @return Boolean
|
||||
* @access private
|
||||
*/
|
||||
function _send_sftp_packet($type, $data)
|
||||
{
|
||||
$packet = $this->request_id !== false ?
|
||||
pack('NCNa*', strlen($data) + 5, $type, $this->request_id, $data) :
|
||||
pack('NCa*', strlen($data) + 1, $type, $data);
|
||||
|
||||
$start = strtok(microtime(), ' ') + strtok(''); // http://php.net/microtime#61838
|
||||
$result = $this->_send_channel_packet(NET_SFTP_CHANNEL, $packet);
|
||||
$stop = strtok(microtime(), ' ') + strtok('');
|
||||
|
||||
if (defined('NET_SFTP_LOGGING')) {
|
||||
$this->packet_type_log[] = '-> ' . $this->packet_types[$type] .
|
||||
' (' . round($stop - $start, 4) . 's)';
|
||||
if (NET_SFTP_LOGGING == NET_SFTP_LOG_COMPLEX) {
|
||||
$this->packet_log[] = $data;
|
||||
}
|
||||
}
|
||||
|
||||
return $result;
|
||||
}
|
||||
|
||||
/**
|
||||
* Receives SFTP Packets
|
||||
*
|
||||
* See '6. General Packet Format' of draft-ietf-secsh-filexfer-13 for more info.
|
||||
*
|
||||
* Incidentally, the number of SSH_MSG_CHANNEL_DATA messages has no bearing on the number of SFTP packets present.
|
||||
* There can be one SSH_MSG_CHANNEL_DATA messages containing two SFTP packets or there can be two SSH_MSG_CHANNEL_DATA
|
||||
* messages containing one SFTP packet.
|
||||
*
|
||||
* @see Net_SFTP::_send_sftp_packet()
|
||||
* @return String
|
||||
* @access private
|
||||
*/
|
||||
function _get_sftp_packet()
|
||||
{
|
||||
$start = strtok(microtime(), ' ') + strtok(''); // http://php.net/microtime#61838
|
||||
|
||||
// SFTP packet length
|
||||
while (strlen($this->packet_buffer) < 4) {
|
||||
$temp = $this->_get_channel_packet(NET_SFTP_CHANNEL);
|
||||
if (is_bool($temp)) {
|
||||
$this->packet_type = false;
|
||||
$this->packet_buffer = '';
|
||||
return false;
|
||||
}
|
||||
$this->packet_buffer.= $temp;
|
||||
}
|
||||
extract(unpack('Nlength', $this->_string_shift($this->packet_buffer, 4)));
|
||||
$tempLength = $length;
|
||||
$tempLength-= strlen($this->packet_buffer);
|
||||
|
||||
// SFTP packet type and data payload
|
||||
while ($tempLength > 0) {
|
||||
$temp = $this->_get_channel_packet(NET_SFTP_CHANNEL);
|
||||
if (is_bool($temp)) {
|
||||
$this->packet_type = false;
|
||||
$this->packet_buffer = '';
|
||||
return false;
|
||||
}
|
||||
$this->packet_buffer.= $temp;
|
||||
$tempLength-= strlen($temp);
|
||||
}
|
||||
|
||||
$stop = strtok(microtime(), ' ') + strtok('');
|
||||
|
||||
$this->packet_type = ord($this->_string_shift($this->packet_buffer));
|
||||
|
||||
if ($this->request_id !== false) {
|
||||
$this->_string_shift($this->packet_buffer, 4); // remove the request id
|
||||
$length-= 5; // account for the request id and the packet type
|
||||
} else {
|
||||
$length-= 1; // account for the packet type
|
||||
}
|
||||
|
||||
$packet = $this->_string_shift($this->packet_buffer, $length);
|
||||
|
||||
if (defined('NET_SFTP_LOGGING')) {
|
||||
$this->packet_type_log[] = '<- ' . $this->packet_types[$this->packet_type] .
|
||||
' (' . round($stop - $start, 4) . 's)';
|
||||
if (NET_SFTP_LOGGING == NET_SFTP_LOG_COMPLEX) {
|
||||
$this->packet_log[] = $packet;
|
||||
}
|
||||
}
|
||||
|
||||
return $packet;
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns a log of the packets that have been sent and received.
|
||||
*
|
||||
* Returns a string if NET_SFTP_LOGGING == NET_SFTP_LOG_COMPLEX, an array if NET_SFTP_LOGGING == NET_SFTP_LOG_SIMPLE and false if !defined('NET_SFTP_LOGGING')
|
||||
*
|
||||
* @access public
|
||||
* @return String or Array
|
||||
*/
|
||||
function getSFTPLog()
|
||||
{
|
||||
if (!defined('NET_SFTP_LOGGING')) {
|
||||
return false;
|
||||
}
|
||||
|
||||
switch (NET_SFTP_LOGGING) {
|
||||
case NET_SFTP_LOG_COMPLEX:
|
||||
return $this->_format_log($this->packet_log, $this->packet_type_log);
|
||||
break;
|
||||
//case NET_SFTP_LOG_SIMPLE:
|
||||
default:
|
||||
return $this->packet_type_log;
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns all errors
|
||||
*
|
||||
* @return String
|
||||
* @access public
|
||||
*/
|
||||
function getSFTPErrors()
|
||||
{
|
||||
return $this->sftp_errors;
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the last error
|
||||
*
|
||||
* @return String
|
||||
* @access public
|
||||
*/
|
||||
function getLastSFTPError()
|
||||
{
|
||||
return $this->sftp_errors[count($this->sftp_errors) - 1];
|
||||
}
|
||||
|
||||
/**
|
||||
* Get supported SFTP versions
|
||||
*
|
||||
* @return Array
|
||||
* @access public
|
||||
*/
|
||||
function getSupportedVersions()
|
||||
{
|
||||
$temp = array('version' => $this->version);
|
||||
if (isset($this->extensions['versions'])) {
|
||||
$temp['extensions'] = $this->extensions['versions'];
|
||||
}
|
||||
return $temp;
|
||||
}
|
||||
|
||||
/**
|
||||
* Disconnect
|
||||
*
|
||||
* @param Integer $reason
|
||||
* @return Boolean
|
||||
* @access private
|
||||
*/
|
||||
function _disconnect($reason)
|
||||
{
|
||||
$this->pwd = false;
|
||||
parent::_disconnect($reason);
|
||||
}
|
||||
}
|
||||
1160
phpsec/Net/SSH1.php
Normal file
1160
phpsec/Net/SSH1.php
Normal file
|
|
@ -0,0 +1,1160 @@
|
|||
<?php
|
||||
/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
|
||||
|
||||
/**
|
||||
* Pure-PHP implementation of SSHv1.
|
||||
*
|
||||
* PHP versions 4 and 5
|
||||
*
|
||||
* Here's a short example of how to use this library:
|
||||
* <code>
|
||||
* <?php
|
||||
* include('Net/SSH1.php');
|
||||
*
|
||||
* $ssh = new Net_SSH1('www.domain.tld');
|
||||
* if (!$ssh->login('username', 'password')) {
|
||||
* exit('Login Failed');
|
||||
* }
|
||||
*
|
||||
* while (true) {
|
||||
* echo $ssh->interactiveRead();
|
||||
*
|
||||
* $read = array(STDIN);
|
||||
* $write = $except = NULL;
|
||||
* if (stream_select($read, $write, $except, 0)) {
|
||||
* $ssh->interactiveWrite(fread(STDIN, 1));
|
||||
* }
|
||||
* }
|
||||
* ?>
|
||||
* </code>
|
||||
*
|
||||
* Here's another short example:
|
||||
* <code>
|
||||
* <?php
|
||||
* include('Net/SSH1.php');
|
||||
*
|
||||
* $ssh = new Net_SSH1('www.domain.tld');
|
||||
* if (!$ssh->login('username', 'password')) {
|
||||
* exit('Login Failed');
|
||||
* }
|
||||
*
|
||||
* echo $ssh->exec('ls -la');
|
||||
* ?>
|
||||
* </code>
|
||||
*
|
||||
* More information on the SSHv1 specification can be found by reading
|
||||
* {@link http://www.snailbook.com/docs/protocol-1.5.txt protocol-1.5.txt}.
|
||||
*
|
||||
* LICENSE: This library is free software; you can redistribute it and/or
|
||||
* modify it under the terms of the GNU Lesser General Public
|
||||
* License as published by the Free Software Foundation; either
|
||||
* version 2.1 of the License, or (at your option) any later version.
|
||||
*
|
||||
* This library is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
* Lesser General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU Lesser General Public
|
||||
* License along with this library; if not, write to the Free Software
|
||||
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
|
||||
* MA 02111-1307 USA
|
||||
*
|
||||
* @category Net
|
||||
* @package Net_SSH1
|
||||
* @author Jim Wigginton <terrafrost@php.net>
|
||||
* @copyright MMVII Jim Wigginton
|
||||
* @license http://www.gnu.org/licenses/lgpl.txt
|
||||
* @version $Id: SSH1.php,v 1.15 2010/03/22 22:01:38 terrafrost Exp $
|
||||
* @link http://phpseclib.sourceforge.net
|
||||
*/
|
||||
|
||||
/**
|
||||
* Include Math_BigInteger
|
||||
*
|
||||
* Used to do RSA encryption.
|
||||
*/
|
||||
require_once('Math/BigInteger.php');
|
||||
|
||||
/**
|
||||
* Include Crypt_Null
|
||||
*/
|
||||
//require_once('Crypt/Null.php');
|
||||
|
||||
/**
|
||||
* Include Crypt_DES
|
||||
*/
|
||||
require_once('Crypt/DES.php');
|
||||
|
||||
/**
|
||||
* Include Crypt_TripleDES
|
||||
*/
|
||||
require_once('Crypt/TripleDES.php');
|
||||
|
||||
/**
|
||||
* Include Crypt_RC4
|
||||
*/
|
||||
require_once('Crypt/RC4.php');
|
||||
|
||||
/**
|
||||
* Include Crypt_Random
|
||||
*/
|
||||
require_once('Crypt/Random.php');
|
||||
|
||||
/**#@+
|
||||
* Protocol Flags
|
||||
*
|
||||
* @access private
|
||||
*/
|
||||
define('NET_SSH1_MSG_DISCONNECT', 1);
|
||||
define('NET_SSH1_SMSG_PUBLIC_KEY', 2);
|
||||
define('NET_SSH1_CMSG_SESSION_KEY', 3);
|
||||
define('NET_SSH1_CMSG_USER', 4);
|
||||
define('NET_SSH1_CMSG_AUTH_PASSWORD', 9);
|
||||
define('NET_SSH1_CMSG_REQUEST_PTY', 10);
|
||||
define('NET_SSH1_CMSG_EXEC_SHELL', 12);
|
||||
define('NET_SSH1_CMSG_EXEC_CMD', 13);
|
||||
define('NET_SSH1_SMSG_SUCCESS', 14);
|
||||
define('NET_SSH1_SMSG_FAILURE', 15);
|
||||
define('NET_SSH1_CMSG_STDIN_DATA', 16);
|
||||
define('NET_SSH1_SMSG_STDOUT_DATA', 17);
|
||||
define('NET_SSH1_SMSG_STDERR_DATA', 18);
|
||||
define('NET_SSH1_SMSG_EXITSTATUS', 20);
|
||||
define('NET_SSH1_CMSG_EXIT_CONFIRMATION', 33);
|
||||
/**#@-*/
|
||||
|
||||
/**#@+
|
||||
* Encryption Methods
|
||||
*
|
||||
* @see Net_SSH1::getSupportedCiphers()
|
||||
* @access public
|
||||
*/
|
||||
/**
|
||||
* No encryption
|
||||
*
|
||||
* Not supported.
|
||||
*/
|
||||
define('NET_SSH1_CIPHER_NONE', 0);
|
||||
/**
|
||||
* IDEA in CFB mode
|
||||
*
|
||||
* Not supported.
|
||||
*/
|
||||
define('NET_SSH1_CIPHER_IDEA', 1);
|
||||
/**
|
||||
* DES in CBC mode
|
||||
*/
|
||||
define('NET_SSH1_CIPHER_DES', 2);
|
||||
/**
|
||||
* Triple-DES in CBC mode
|
||||
*
|
||||
* All implementations are required to support this
|
||||
*/
|
||||
define('NET_SSH1_CIPHER_3DES', 3);
|
||||
/**
|
||||
* TRI's Simple Stream encryption CBC
|
||||
*
|
||||
* Not supported nor is it defined in the official SSH1 specs. OpenSSH, however, does define it (see cipher.h),
|
||||
* although it doesn't use it (see cipher.c)
|
||||
*/
|
||||
define('NET_SSH1_CIPHER_BROKEN_TSS', 4);
|
||||
/**
|
||||
* RC4
|
||||
*
|
||||
* Not supported.
|
||||
*
|
||||
* @internal According to the SSH1 specs:
|
||||
*
|
||||
* "The first 16 bytes of the session key are used as the key for
|
||||
* the server to client direction. The remaining 16 bytes are used
|
||||
* as the key for the client to server direction. This gives
|
||||
* independent 128-bit keys for each direction."
|
||||
*
|
||||
* This library currently only supports encryption when the same key is being used for both directions. This is
|
||||
* because there's only one $crypto object. Two could be added ($encrypt and $decrypt, perhaps).
|
||||
*/
|
||||
define('NET_SSH1_CIPHER_RC4', 5);
|
||||
/**
|
||||
* Blowfish
|
||||
*
|
||||
* Not supported nor is it defined in the official SSH1 specs. OpenSSH, however, defines it (see cipher.h) and
|
||||
* uses it (see cipher.c)
|
||||
*/
|
||||
define('NET_SSH1_CIPHER_BLOWFISH', 6);
|
||||
/**#@-*/
|
||||
|
||||
/**#@+
|
||||
* Authentication Methods
|
||||
*
|
||||
* @see Net_SSH1::getSupportedAuthentications()
|
||||
* @access public
|
||||
*/
|
||||
/**
|
||||
* .rhosts or /etc/hosts.equiv
|
||||
*/
|
||||
define('NET_SSH1_AUTH_RHOSTS', 1);
|
||||
/**
|
||||
* pure RSA authentication
|
||||
*/
|
||||
define('NET_SSH1_AUTH_RSA', 2);
|
||||
/**
|
||||
* password authentication
|
||||
*
|
||||
* This is the only method that is supported by this library.
|
||||
*/
|
||||
define('NET_SSH1_AUTH_PASSWORD', 3);
|
||||
/**
|
||||
* .rhosts with RSA host authentication
|
||||
*/
|
||||
define('NET_SSH1_AUTH_RHOSTS_RSA', 4);
|
||||
/**#@-*/
|
||||
|
||||
/**#@+
|
||||
* Terminal Modes
|
||||
*
|
||||
* @link http://3sp.com/content/developer/maverick-net/docs/Maverick.SSH.PseudoTerminalModesMembers.html
|
||||
* @access private
|
||||
*/
|
||||
define('NET_SSH1_TTY_OP_END', 0);
|
||||
/**#@-*/
|
||||
|
||||
/**
|
||||
* The Response Type
|
||||
*
|
||||
* @see Net_SSH1::_get_binary_packet()
|
||||
* @access private
|
||||
*/
|
||||
define('NET_SSH1_RESPONSE_TYPE', 1);
|
||||
|
||||
/**
|
||||
* The Response Data
|
||||
*
|
||||
* @see Net_SSH1::_get_binary_packet()
|
||||
* @access private
|
||||
*/
|
||||
define('NET_SSH1_RESPONSE_DATA', 2);
|
||||
|
||||
/**#@+
|
||||
* Execution Bitmap Masks
|
||||
*
|
||||
* @see Net_SSH1::bitmap
|
||||
* @access private
|
||||
*/
|
||||
define('NET_SSH1_MASK_CONSTRUCTOR', 0x00000001);
|
||||
define('NET_SSH1_MASK_LOGIN', 0x00000002);
|
||||
define('NET_SSH1_MASK_SHELL', 0x00000004);
|
||||
/**#@-*/
|
||||
|
||||
/**
|
||||
* Pure-PHP implementation of SSHv1.
|
||||
*
|
||||
* @author Jim Wigginton <terrafrost@php.net>
|
||||
* @version 0.1.0
|
||||
* @access public
|
||||
* @package Net_SSH1
|
||||
*/
|
||||
class Net_SSH1 {
|
||||
/**
|
||||
* The SSH identifier
|
||||
*
|
||||
* @var String
|
||||
* @access private
|
||||
*/
|
||||
var $identifier = 'SSH-1.5-phpseclib';
|
||||
|
||||
/**
|
||||
* The Socket Object
|
||||
*
|
||||
* @var Object
|
||||
* @access private
|
||||
*/
|
||||
var $fsock;
|
||||
|
||||
/**
|
||||
* The cryptography object
|
||||
*
|
||||
* @var Object
|
||||
* @access private
|
||||
*/
|
||||
var $crypto = false;
|
||||
|
||||
/**
|
||||
* Execution Bitmap
|
||||
*
|
||||
* The bits that are set reprsent functions that have been called already. This is used to determine
|
||||
* if a requisite function has been successfully executed. If not, an error should be thrown.
|
||||
*
|
||||
* @var Integer
|
||||
* @access private
|
||||
*/
|
||||
var $bitmap = 0;
|
||||
|
||||
/**
|
||||
* The Server Key Public Exponent
|
||||
*
|
||||
* Logged for debug purposes
|
||||
*
|
||||
* @see Net_SSH1::getServerKeyPublicExponent()
|
||||
* @var String
|
||||
* @access private
|
||||
*/
|
||||
var $server_key_public_exponent;
|
||||
|
||||
/**
|
||||
* The Server Key Public Modulus
|
||||
*
|
||||
* Logged for debug purposes
|
||||
*
|
||||
* @see Net_SSH1::getServerKeyPublicModulus()
|
||||
* @var String
|
||||
* @access private
|
||||
*/
|
||||
var $server_key_public_modulus;
|
||||
|
||||
/**
|
||||
* The Host Key Public Exponent
|
||||
*
|
||||
* Logged for debug purposes
|
||||
*
|
||||
* @see Net_SSH1::getHostKeyPublicExponent()
|
||||
* @var String
|
||||
* @access private
|
||||
*/
|
||||
var $host_key_public_exponent;
|
||||
|
||||
/**
|
||||
* The Host Key Public Modulus
|
||||
*
|
||||
* Logged for debug purposes
|
||||
*
|
||||
* @see Net_SSH1::getHostKeyPublicModulus()
|
||||
* @var String
|
||||
* @access private
|
||||
*/
|
||||
var $host_key_public_modulus;
|
||||
|
||||
/**
|
||||
* Supported Ciphers
|
||||
*
|
||||
* Logged for debug purposes
|
||||
*
|
||||
* @see Net_SSH1::getSupportedCiphers()
|
||||
* @var Array
|
||||
* @access private
|
||||
*/
|
||||
var $supported_ciphers = array(
|
||||
NET_SSH1_CIPHER_NONE => 'No encryption',
|
||||
NET_SSH1_CIPHER_IDEA => 'IDEA in CFB mode',
|
||||
NET_SSH1_CIPHER_DES => 'DES in CBC mode',
|
||||
NET_SSH1_CIPHER_3DES => 'Triple-DES in CBC mode',
|
||||
NET_SSH1_CIPHER_BROKEN_TSS => 'TRI\'s Simple Stream encryption CBC',
|
||||
NET_SSH1_CIPHER_RC4 => 'RC4',
|
||||
NET_SSH1_CIPHER_BLOWFISH => 'Blowfish'
|
||||
);
|
||||
|
||||
/**
|
||||
* Supported Authentications
|
||||
*
|
||||
* Logged for debug purposes
|
||||
*
|
||||
* @see Net_SSH1::getSupportedAuthentications()
|
||||
* @var Array
|
||||
* @access private
|
||||
*/
|
||||
var $supported_authentications = array(
|
||||
NET_SSH1_AUTH_RHOSTS => '.rhosts or /etc/hosts.equiv',
|
||||
NET_SSH1_AUTH_RSA => 'pure RSA authentication',
|
||||
NET_SSH1_AUTH_PASSWORD => 'password authentication',
|
||||
NET_SSH1_AUTH_RHOSTS_RSA => '.rhosts with RSA host authentication'
|
||||
);
|
||||
|
||||
/**
|
||||
* Server Identification
|
||||
*
|
||||
* @see Net_SSH1::getServerIdentification()
|
||||
* @var String
|
||||
* @access private
|
||||
*/
|
||||
var $server_identification = '';
|
||||
|
||||
/**
|
||||
* Default Constructor.
|
||||
*
|
||||
* Connects to an SSHv1 server
|
||||
*
|
||||
* @param String $host
|
||||
* @param optional Integer $port
|
||||
* @param optional Integer $timeout
|
||||
* @param optional Integer $cipher
|
||||
* @return Net_SSH1
|
||||
* @access public
|
||||
*/
|
||||
function Net_SSH1($host, $port = 22, $timeout = 10, $cipher = NET_SSH1_CIPHER_3DES)
|
||||
{
|
||||
$this->fsock = @fsockopen($host, $port, $errno, $errstr, $timeout);
|
||||
if (!$this->fsock) {
|
||||
user_error(rtrim("Cannot connect to $host. Error $errno. $errstr"), E_USER_NOTICE);
|
||||
return;
|
||||
}
|
||||
|
||||
$this->server_identification = $init_line = fgets($this->fsock, 255);
|
||||
if (!preg_match('#SSH-([0-9\.]+)-(.+)#', $init_line, $parts)) {
|
||||
user_error('Can only connect to SSH servers', E_USER_NOTICE);
|
||||
return;
|
||||
}
|
||||
if ($parts[1][0] != 1) {
|
||||
user_error("Cannot connect to SSH $parts[1] servers", E_USER_NOTICE);
|
||||
return;
|
||||
}
|
||||
|
||||
fputs($this->fsock, $this->identifier."\r\n");
|
||||
|
||||
$response = $this->_get_binary_packet();
|
||||
if ($response[NET_SSH1_RESPONSE_TYPE] != NET_SSH1_SMSG_PUBLIC_KEY) {
|
||||
user_error('Expected SSH_SMSG_PUBLIC_KEY', E_USER_NOTICE);
|
||||
return;
|
||||
}
|
||||
|
||||
$anti_spoofing_cookie = $this->_string_shift($response[NET_SSH1_RESPONSE_DATA], 8);
|
||||
|
||||
$this->_string_shift($response[NET_SSH1_RESPONSE_DATA], 4);
|
||||
|
||||
$temp = unpack('nlen', $this->_string_shift($response[NET_SSH1_RESPONSE_DATA], 2));
|
||||
$server_key_public_exponent = new Math_BigInteger($this->_string_shift($response[NET_SSH1_RESPONSE_DATA], ceil($temp['len'] / 8)), 256);
|
||||
$this->server_key_public_exponent = $server_key_public_exponent;
|
||||
|
||||
$temp = unpack('nlen', $this->_string_shift($response[NET_SSH1_RESPONSE_DATA], 2));
|
||||
$server_key_public_modulus = new Math_BigInteger($this->_string_shift($response[NET_SSH1_RESPONSE_DATA], ceil($temp['len'] / 8)), 256);
|
||||
$this->server_key_public_modulus = $server_key_public_modulus;
|
||||
|
||||
$this->_string_shift($response[NET_SSH1_RESPONSE_DATA], 4);
|
||||
|
||||
$temp = unpack('nlen', $this->_string_shift($response[NET_SSH1_RESPONSE_DATA], 2));
|
||||
$host_key_public_exponent = new Math_BigInteger($this->_string_shift($response[NET_SSH1_RESPONSE_DATA], ceil($temp['len'] / 8)), 256);
|
||||
$this->host_key_public_exponent = $host_key_public_exponent;
|
||||
|
||||
$temp = unpack('nlen', $this->_string_shift($response[NET_SSH1_RESPONSE_DATA], 2));
|
||||
$host_key_public_modulus = new Math_BigInteger($this->_string_shift($response[NET_SSH1_RESPONSE_DATA], ceil($temp['len'] / 8)), 256);
|
||||
$this->host_key_public_modulus = $host_key_public_modulus;
|
||||
|
||||
$this->_string_shift($response[NET_SSH1_RESPONSE_DATA], 4);
|
||||
|
||||
// get a list of the supported ciphers
|
||||
extract(unpack('Nsupported_ciphers_mask', $this->_string_shift($response[NET_SSH1_RESPONSE_DATA], 4)));
|
||||
foreach ($this->supported_ciphers as $mask=>$name) {
|
||||
if (($supported_ciphers_mask & (1 << $mask)) == 0) {
|
||||
unset($this->supported_ciphers[$mask]);
|
||||
}
|
||||
}
|
||||
|
||||
// get a list of the supported authentications
|
||||
extract(unpack('Nsupported_authentications_mask', $this->_string_shift($response[NET_SSH1_RESPONSE_DATA], 4)));
|
||||
foreach ($this->supported_authentications as $mask=>$name) {
|
||||
if (($supported_authentications_mask & (1 << $mask)) == 0) {
|
||||
unset($this->supported_authentications[$mask]);
|
||||
}
|
||||
}
|
||||
|
||||
$session_id = pack('H*', md5($host_key_public_modulus->toBytes() . $server_key_public_modulus->toBytes() . $anti_spoofing_cookie));
|
||||
|
||||
$session_key = '';
|
||||
for ($i = 0; $i < 32; $i++) {
|
||||
$session_key.= chr(crypt_random(0, 255));
|
||||
}
|
||||
$double_encrypted_session_key = $session_key ^ str_pad($session_id, 32, chr(0));
|
||||
|
||||
if ($server_key_public_modulus->compare($host_key_public_modulus) < 0) {
|
||||
$double_encrypted_session_key = $this->_rsa_crypt(
|
||||
$double_encrypted_session_key,
|
||||
array(
|
||||
$server_key_public_exponent,
|
||||
$server_key_public_modulus
|
||||
)
|
||||
);
|
||||
$double_encrypted_session_key = $this->_rsa_crypt(
|
||||
$double_encrypted_session_key,
|
||||
array(
|
||||
$host_key_public_exponent,
|
||||
$host_key_public_modulus
|
||||
)
|
||||
);
|
||||
} else {
|
||||
$double_encrypted_session_key = $this->_rsa_crypt(
|
||||
$double_encrypted_session_key,
|
||||
array(
|
||||
$host_key_public_exponent,
|
||||
$host_key_public_modulus
|
||||
)
|
||||
);
|
||||
$double_encrypted_session_key = $this->_rsa_crypt(
|
||||
$double_encrypted_session_key,
|
||||
array(
|
||||
$server_key_public_exponent,
|
||||
$server_key_public_modulus
|
||||
)
|
||||
);
|
||||
}
|
||||
|
||||
$cipher = isset($this->supported_ciphers[$cipher]) ? $cipher : NET_SSH1_CIPHER_3DES;
|
||||
$data = pack('C2a*na*N', NET_SSH1_CMSG_SESSION_KEY, $cipher, $anti_spoofing_cookie, 8 * strlen($double_encrypted_session_key), $double_encrypted_session_key, 0);
|
||||
|
||||
if (!$this->_send_binary_packet($data)) {
|
||||
user_error('Error sending SSH_CMSG_SESSION_KEY', E_USER_NOTICE);
|
||||
return;
|
||||
}
|
||||
|
||||
switch ($cipher) {
|
||||
//case NET_SSH1_CIPHER_NONE:
|
||||
// $this->crypto = new Crypt_Null();
|
||||
// break;
|
||||
case NET_SSH1_CIPHER_DES:
|
||||
$this->crypto = new Crypt_DES();
|
||||
$this->crypto->disablePadding();
|
||||
$this->crypto->enableContinuousBuffer();
|
||||
$this->crypto->setKey(substr($session_key, 0, 8));
|
||||
break;
|
||||
case NET_SSH1_CIPHER_3DES:
|
||||
$this->crypto = new Crypt_TripleDES(CRYPT_DES_MODE_3CBC);
|
||||
$this->crypto->disablePadding();
|
||||
$this->crypto->enableContinuousBuffer();
|
||||
$this->crypto->setKey(substr($session_key, 0, 24));
|
||||
break;
|
||||
//case NET_SSH1_CIPHER_RC4:
|
||||
// $this->crypto = new Crypt_RC4();
|
||||
// $this->crypto->enableContinuousBuffer();
|
||||
// $this->crypto->setKey(substr($session_key, 0, 16));
|
||||
// break;
|
||||
}
|
||||
|
||||
$response = $this->_get_binary_packet();
|
||||
|
||||
if ($response[NET_SSH1_RESPONSE_TYPE] != NET_SSH1_SMSG_SUCCESS) {
|
||||
user_error('Expected SSH_SMSG_SUCCESS', E_USER_NOTICE);
|
||||
return;
|
||||
}
|
||||
|
||||
$this->bitmap = NET_SSH1_MASK_CONSTRUCTOR;
|
||||
}
|
||||
|
||||
/**
|
||||
* Login
|
||||
*
|
||||
* @param String $username
|
||||
* @param optional String $password
|
||||
* @return Boolean
|
||||
* @access public
|
||||
*/
|
||||
function login($username, $password = '')
|
||||
{
|
||||
if (!($this->bitmap & NET_SSH1_MASK_CONSTRUCTOR)) {
|
||||
return false;
|
||||
}
|
||||
|
||||
$data = pack('CNa*', NET_SSH1_CMSG_USER, strlen($username), $username);
|
||||
|
||||
if (!$this->_send_binary_packet($data)) {
|
||||
user_error('Error sending SSH_CMSG_USER', E_USER_NOTICE);
|
||||
return false;
|
||||
}
|
||||
|
||||
$response = $this->_get_binary_packet();
|
||||
|
||||
if ($response[NET_SSH1_RESPONSE_TYPE] == NET_SSH1_SMSG_SUCCESS) {
|
||||
$this->bitmap |= NET_SSH1_MASK_LOGIN;
|
||||
return true;
|
||||
} else if ($response[NET_SSH1_RESPONSE_TYPE] != NET_SSH1_SMSG_FAILURE) {
|
||||
user_error('Expected SSH_SMSG_SUCCESS or SSH_SMSG_FAILURE', E_USER_NOTICE);
|
||||
return false;
|
||||
}
|
||||
|
||||
$data = pack('CNa*', NET_SSH1_CMSG_AUTH_PASSWORD, strlen($password), $password);
|
||||
|
||||
if (!$this->_send_binary_packet($data)) {
|
||||
user_error('Error sending SSH_CMSG_AUTH_PASSWORD', E_USER_NOTICE);
|
||||
return false;
|
||||
}
|
||||
|
||||
$response = $this->_get_binary_packet();
|
||||
|
||||
if ($response[NET_SSH1_RESPONSE_TYPE] == NET_SSH1_SMSG_SUCCESS) {
|
||||
$this->bitmap |= NET_SSH1_MASK_LOGIN;
|
||||
return true;
|
||||
} else if ($response[NET_SSH1_RESPONSE_TYPE] == NET_SSH1_SMSG_FAILURE) {
|
||||
return false;
|
||||
} else {
|
||||
user_error('Expected SSH_SMSG_SUCCESS or SSH_SMSG_FAILURE', E_USER_NOTICE);
|
||||
return false;
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Executes a command on a non-interactive shell, returns the output, and quits.
|
||||
*
|
||||
* An SSH1 server will close the connection after a command has been executed on a non-interactive shell. SSH2
|
||||
* servers don't, however, this isn't an SSH2 client. The way this works, on the server, is by initiating a
|
||||
* shell with the -s option, as discussed in the following links:
|
||||
*
|
||||
* {@link http://www.faqs.org/docs/bashman/bashref_65.html http://www.faqs.org/docs/bashman/bashref_65.html}
|
||||
* {@link http://www.faqs.org/docs/bashman/bashref_62.html http://www.faqs.org/docs/bashman/bashref_62.html}
|
||||
*
|
||||
* To execute further commands, a new Net_SSH1 object will need to be created.
|
||||
*
|
||||
* Returns false on failure and the output, otherwise.
|
||||
*
|
||||
* @see Net_SSH1::interactiveRead()
|
||||
* @see Net_SSH1::interactiveWrite()
|
||||
* @param String $cmd
|
||||
* @return mixed
|
||||
* @access public
|
||||
*/
|
||||
function exec($cmd)
|
||||
{
|
||||
if (!($this->bitmap & NET_SSH1_MASK_LOGIN)) {
|
||||
user_error('Operation disallowed prior to login()', E_USER_NOTICE);
|
||||
return false;
|
||||
}
|
||||
|
||||
// connect using the sample parameters in protocol-1.5.txt.
|
||||
// according to wikipedia.org's entry on text terminals, "the fundamental type of application running on a text
|
||||
// terminal is a command line interpreter or shell". thus, opening a terminal session to run the shell.
|
||||
$data = pack('CNa*N4C', NET_SSH1_CMSG_REQUEST_PTY, strlen('vt100'), 'vt100', 24, 80, 0, 0, NET_SSH1_TTY_OP_END);
|
||||
|
||||
if (!$this->_send_binary_packet($data)) {
|
||||
user_error('Error sending SSH_CMSG_REQUEST_PTY', E_USER_NOTICE);
|
||||
return false;
|
||||
}
|
||||
|
||||
$response = $this->_get_binary_packet();
|
||||
|
||||
if ($response[NET_SSH1_RESPONSE_TYPE] != NET_SSH1_SMSG_SUCCESS) {
|
||||
user_error('Expected SSH_SMSG_SUCCESS', E_USER_NOTICE);
|
||||
return false;
|
||||
}
|
||||
|
||||
$data = pack('CNa*', NET_SSH1_CMSG_EXEC_CMD, strlen($cmd), $cmd);
|
||||
|
||||
if (!$this->_send_binary_packet($data)) {
|
||||
user_error('Error sending SSH_CMSG_EXEC_CMD', E_USER_NOTICE);
|
||||
return false;
|
||||
}
|
||||
|
||||
$output = '';
|
||||
$response = $this->_get_binary_packet();
|
||||
|
||||
do {
|
||||
$output.= substr($response[NET_SSH1_RESPONSE_DATA], 4);
|
||||
$response = $this->_get_binary_packet();
|
||||
} while ($response[NET_SSH1_RESPONSE_TYPE] != NET_SSH1_SMSG_EXITSTATUS);
|
||||
|
||||
$data = pack('C', NET_SSH1_CMSG_EXIT_CONFIRMATION);
|
||||
|
||||
// i don't think it's really all that important if this packet gets sent or not.
|
||||
$this->_send_binary_packet($data);
|
||||
|
||||
fclose($this->fsock);
|
||||
|
||||
// reset the execution bitmap - a new Net_SSH1 object needs to be created.
|
||||
$this->bitmap = 0;
|
||||
|
||||
return $output;
|
||||
}
|
||||
|
||||
/**
|
||||
* Creates an interactive shell
|
||||
*
|
||||
* @see Net_SSH1::interactiveRead()
|
||||
* @see Net_SSH1::interactiveWrite()
|
||||
* @return Boolean
|
||||
* @access private
|
||||
*/
|
||||
function _initShell()
|
||||
{
|
||||
$data = pack('CNa*N4C', NET_SSH1_CMSG_REQUEST_PTY, strlen('vt100'), 'vt100', 24, 80, 0, 0, NET_SSH1_TTY_OP_END);
|
||||
|
||||
if (!$this->_send_binary_packet($data)) {
|
||||
user_error('Error sending SSH_CMSG_REQUEST_PTY', E_USER_NOTICE);
|
||||
return false;
|
||||
}
|
||||
|
||||
$response = $this->_get_binary_packet();
|
||||
|
||||
if ($response[NET_SSH1_RESPONSE_TYPE] != NET_SSH1_SMSG_SUCCESS) {
|
||||
user_error('Expected SSH_SMSG_SUCCESS', E_USER_NOTICE);
|
||||
return false;
|
||||
}
|
||||
|
||||
$data = pack('C', NET_SSH1_CMSG_EXEC_SHELL);
|
||||
|
||||
if (!$this->_send_binary_packet($data)) {
|
||||
user_error('Error sending SSH_CMSG_EXEC_SHELL', E_USER_NOTICE);
|
||||
return false;
|
||||
}
|
||||
|
||||
$this->bitmap |= NET_SSH1_MASK_SHELL;
|
||||
|
||||
//stream_set_blocking($this->fsock, 0);
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
/**
|
||||
* Inputs a command into an interactive shell.
|
||||
*
|
||||
* @see Net_SSH1::interactiveRead()
|
||||
* @param String $cmd
|
||||
* @return Boolean
|
||||
* @access public
|
||||
*/
|
||||
function interactiveWrite($cmd)
|
||||
{
|
||||
if (!($this->bitmap & NET_SSH1_MASK_LOGIN)) {
|
||||
user_error('Operation disallowed prior to login()', E_USER_NOTICE);
|
||||
return false;
|
||||
}
|
||||
|
||||
if (!($this->bitmap & NET_SSH1_MASK_SHELL) && !$this->_initShell()) {
|
||||
user_error('Unable to initiate an interactive shell session', E_USER_NOTICE);
|
||||
return false;
|
||||
}
|
||||
|
||||
$data = pack('CNa*', NET_SSH1_CMSG_STDIN_DATA, strlen($cmd), $cmd);
|
||||
|
||||
if (!$this->_send_binary_packet($data)) {
|
||||
user_error('Error sending SSH_CMSG_STDIN', E_USER_NOTICE);
|
||||
return false;
|
||||
}
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
/**
|
||||
* Reads the output of an interactive shell.
|
||||
*
|
||||
* Requires PHP 4.3.0 or later due to the use of the stream_select() function. If you see stuff like
|
||||
* "[00m", you're seeing ANSI escape codes. According to
|
||||
* {@link http://support.microsoft.com/kb/101875 How to Enable ANSI.SYS in a Command Window}, "Windows NT
|
||||
* does not support ANSI escape sequences in Win32 Console applications", so if you're a Windows user,
|
||||
* there's not going to be much recourse.
|
||||
*
|
||||
* @see Net_SSH1::interactiveRead()
|
||||
* @return String
|
||||
* @access public
|
||||
*/
|
||||
function interactiveRead()
|
||||
{
|
||||
if (!($this->bitmap & NET_SSH1_MASK_LOGIN)) {
|
||||
user_error('Operation disallowed prior to login()', E_USER_NOTICE);
|
||||
return false;
|
||||
}
|
||||
|
||||
if (!($this->bitmap & NET_SSH1_MASK_SHELL) && !$this->_initShell()) {
|
||||
user_error('Unable to initiate an interactive shell session', E_USER_NOTICE);
|
||||
return false;
|
||||
}
|
||||
|
||||
$read = array($this->fsock);
|
||||
$write = $except = null;
|
||||
if (stream_select($read, $write, $except, 0)) {
|
||||
$response = $this->_get_binary_packet();
|
||||
return substr($response[NET_SSH1_RESPONSE_DATA], 4);
|
||||
} else {
|
||||
return '';
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Disconnect
|
||||
*
|
||||
* @access public
|
||||
*/
|
||||
function disconnect()
|
||||
{
|
||||
$this->_disconnect();
|
||||
}
|
||||
|
||||
/**
|
||||
* Destructor.
|
||||
*
|
||||
* Will be called, automatically, if you're supporting just PHP5. If you're supporting PHP4, you'll need to call
|
||||
* disconnect().
|
||||
*
|
||||
* @access public
|
||||
*/
|
||||
function __destruct()
|
||||
{
|
||||
$this->_disconnect();
|
||||
}
|
||||
|
||||
/**
|
||||
* Disconnect
|
||||
*
|
||||
* @param String $msg
|
||||
* @access private
|
||||
*/
|
||||
function _disconnect($msg = 'Client Quit')
|
||||
{
|
||||
if ($this->bitmap) {
|
||||
$data = pack('CNa*', NET_SSH1_MSG_DISCONNECT, strlen($msg), $msg);
|
||||
$this->_send_binary_packet($data);
|
||||
fclose($this->fsock);
|
||||
$this->bitmap = 0;
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Gets Binary Packets
|
||||
*
|
||||
* See 'The Binary Packet Protocol' of protocol-1.5.txt for more info.
|
||||
*
|
||||
* Also, this function could be improved upon by adding detection for the following exploit:
|
||||
* http://www.securiteam.com/securitynews/5LP042K3FY.html
|
||||
*
|
||||
* @see Net_SSH1::_send_binary_packet()
|
||||
* @return Array
|
||||
* @access private
|
||||
*/
|
||||
function _get_binary_packet()
|
||||
{
|
||||
if (feof($this->fsock)) {
|
||||
//user_error('connection closed prematurely', E_USER_NOTICE);
|
||||
return false;
|
||||
}
|
||||
|
||||
$temp = unpack('Nlength', fread($this->fsock, 4));
|
||||
|
||||
$padding_length = 8 - ($temp['length'] & 7);
|
||||
$length = $temp['length'] + $padding_length;
|
||||
|
||||
$raw = fread($this->fsock, $length);
|
||||
|
||||
if ($this->crypto !== false) {
|
||||
$raw = $this->crypto->decrypt($raw);
|
||||
}
|
||||
|
||||
$padding = substr($raw, 0, $padding_length);
|
||||
$type = $raw[$padding_length];
|
||||
$data = substr($raw, $padding_length + 1, -4);
|
||||
|
||||
$temp = unpack('Ncrc', substr($raw, -4));
|
||||
|
||||
//if ( $temp['crc'] != $this->_crc($padding . $type . $data) ) {
|
||||
// user_error('Bad CRC in packet from server', E_USER_NOTICE);
|
||||
// return false;
|
||||
//}
|
||||
|
||||
return array(
|
||||
NET_SSH1_RESPONSE_TYPE => ord($type),
|
||||
NET_SSH1_RESPONSE_DATA => $data
|
||||
);
|
||||
}
|
||||
|
||||
/**
|
||||
* Sends Binary Packets
|
||||
*
|
||||
* Returns true on success, false on failure.
|
||||
*
|
||||
* @see Net_SSH1::_get_binary_packet()
|
||||
* @param String $data
|
||||
* @return Boolean
|
||||
* @access private
|
||||
*/
|
||||
function _send_binary_packet($data) {
|
||||
if (feof($this->fsock)) {
|
||||
//user_error('connection closed prematurely', E_USER_NOTICE);
|
||||
return false;
|
||||
}
|
||||
|
||||
$length = strlen($data) + 4;
|
||||
|
||||
$padding_length = 8 - ($length & 7);
|
||||
$padding = '';
|
||||
for ($i = 0; $i < $padding_length; $i++) {
|
||||
$padding.= chr(crypt_random(0, 255));
|
||||
}
|
||||
|
||||
$data = $padding . $data;
|
||||
$data.= pack('N', $this->_crc($data));
|
||||
|
||||
if ($this->crypto !== false) {
|
||||
$data = $this->crypto->encrypt($data);
|
||||
}
|
||||
|
||||
$packet = pack('Na*', $length, $data);
|
||||
|
||||
return strlen($packet) == fputs($this->fsock, $packet);
|
||||
}
|
||||
|
||||
/**
|
||||
* Cyclic Redundancy Check (CRC)
|
||||
*
|
||||
* PHP's crc32 function is implemented slightly differently than the one that SSH v1 uses, so
|
||||
* we've reimplemented it. A more detailed discussion of the differences can be found after
|
||||
* $crc_lookup_table's initialization.
|
||||
*
|
||||
* @see Net_SSH1::_get_binary_packet()
|
||||
* @see Net_SSH1::_send_binary_packet()
|
||||
* @param String $data
|
||||
* @return Integer
|
||||
* @access private
|
||||
*/
|
||||
function _crc($data)
|
||||
{
|
||||
static $crc_lookup_table = array(
|
||||
0x00000000, 0x77073096, 0xEE0E612C, 0x990951BA,
|
||||
0x076DC419, 0x706AF48F, 0xE963A535, 0x9E6495A3,
|
||||
0x0EDB8832, 0x79DCB8A4, 0xE0D5E91E, 0x97D2D988,
|
||||
0x09B64C2B, 0x7EB17CBD, 0xE7B82D07, 0x90BF1D91,
|
||||
0x1DB71064, 0x6AB020F2, 0xF3B97148, 0x84BE41DE,
|
||||
0x1ADAD47D, 0x6DDDE4EB, 0xF4D4B551, 0x83D385C7,
|
||||
0x136C9856, 0x646BA8C0, 0xFD62F97A, 0x8A65C9EC,
|
||||
0x14015C4F, 0x63066CD9, 0xFA0F3D63, 0x8D080DF5,
|
||||
0x3B6E20C8, 0x4C69105E, 0xD56041E4, 0xA2677172,
|
||||
0x3C03E4D1, 0x4B04D447, 0xD20D85FD, 0xA50AB56B,
|
||||
0x35B5A8FA, 0x42B2986C, 0xDBBBC9D6, 0xACBCF940,
|
||||
0x32D86CE3, 0x45DF5C75, 0xDCD60DCF, 0xABD13D59,
|
||||
0x26D930AC, 0x51DE003A, 0xC8D75180, 0xBFD06116,
|
||||
0x21B4F4B5, 0x56B3C423, 0xCFBA9599, 0xB8BDA50F,
|
||||
0x2802B89E, 0x5F058808, 0xC60CD9B2, 0xB10BE924,
|
||||
0x2F6F7C87, 0x58684C11, 0xC1611DAB, 0xB6662D3D,
|
||||
0x76DC4190, 0x01DB7106, 0x98D220BC, 0xEFD5102A,
|
||||
0x71B18589, 0x06B6B51F, 0x9FBFE4A5, 0xE8B8D433,
|
||||
0x7807C9A2, 0x0F00F934, 0x9609A88E, 0xE10E9818,
|
||||
0x7F6A0DBB, 0x086D3D2D, 0x91646C97, 0xE6635C01,
|
||||
0x6B6B51F4, 0x1C6C6162, 0x856530D8, 0xF262004E,
|
||||
0x6C0695ED, 0x1B01A57B, 0x8208F4C1, 0xF50FC457,
|
||||
0x65B0D9C6, 0x12B7E950, 0x8BBEB8EA, 0xFCB9887C,
|
||||
0x62DD1DDF, 0x15DA2D49, 0x8CD37CF3, 0xFBD44C65,
|
||||
0x4DB26158, 0x3AB551CE, 0xA3BC0074, 0xD4BB30E2,
|
||||
0x4ADFA541, 0x3DD895D7, 0xA4D1C46D, 0xD3D6F4FB,
|
||||
0x4369E96A, 0x346ED9FC, 0xAD678846, 0xDA60B8D0,
|
||||
0x44042D73, 0x33031DE5, 0xAA0A4C5F, 0xDD0D7CC9,
|
||||
0x5005713C, 0x270241AA, 0xBE0B1010, 0xC90C2086,
|
||||
0x5768B525, 0x206F85B3, 0xB966D409, 0xCE61E49F,
|
||||
0x5EDEF90E, 0x29D9C998, 0xB0D09822, 0xC7D7A8B4,
|
||||
0x59B33D17, 0x2EB40D81, 0xB7BD5C3B, 0xC0BA6CAD,
|
||||
0xEDB88320, 0x9ABFB3B6, 0x03B6E20C, 0x74B1D29A,
|
||||
0xEAD54739, 0x9DD277AF, 0x04DB2615, 0x73DC1683,
|
||||
0xE3630B12, 0x94643B84, 0x0D6D6A3E, 0x7A6A5AA8,
|
||||
0xE40ECF0B, 0x9309FF9D, 0x0A00AE27, 0x7D079EB1,
|
||||
0xF00F9344, 0x8708A3D2, 0x1E01F268, 0x6906C2FE,
|
||||
0xF762575D, 0x806567CB, 0x196C3671, 0x6E6B06E7,
|
||||
0xFED41B76, 0x89D32BE0, 0x10DA7A5A, 0x67DD4ACC,
|
||||
0xF9B9DF6F, 0x8EBEEFF9, 0x17B7BE43, 0x60B08ED5,
|
||||
0xD6D6A3E8, 0xA1D1937E, 0x38D8C2C4, 0x4FDFF252,
|
||||
0xD1BB67F1, 0xA6BC5767, 0x3FB506DD, 0x48B2364B,
|
||||
0xD80D2BDA, 0xAF0A1B4C, 0x36034AF6, 0x41047A60,
|
||||
0xDF60EFC3, 0xA867DF55, 0x316E8EEF, 0x4669BE79,
|
||||
0xCB61B38C, 0xBC66831A, 0x256FD2A0, 0x5268E236,
|
||||
0xCC0C7795, 0xBB0B4703, 0x220216B9, 0x5505262F,
|
||||
0xC5BA3BBE, 0xB2BD0B28, 0x2BB45A92, 0x5CB36A04,
|
||||
0xC2D7FFA7, 0xB5D0CF31, 0x2CD99E8B, 0x5BDEAE1D,
|
||||
0x9B64C2B0, 0xEC63F226, 0x756AA39C, 0x026D930A,
|
||||
0x9C0906A9, 0xEB0E363F, 0x72076785, 0x05005713,
|
||||
0x95BF4A82, 0xE2B87A14, 0x7BB12BAE, 0x0CB61B38,
|
||||
0x92D28E9B, 0xE5D5BE0D, 0x7CDCEFB7, 0x0BDBDF21,
|
||||
0x86D3D2D4, 0xF1D4E242, 0x68DDB3F8, 0x1FDA836E,
|
||||
0x81BE16CD, 0xF6B9265B, 0x6FB077E1, 0x18B74777,
|
||||
0x88085AE6, 0xFF0F6A70, 0x66063BCA, 0x11010B5C,
|
||||
0x8F659EFF, 0xF862AE69, 0x616BFFD3, 0x166CCF45,
|
||||
0xA00AE278, 0xD70DD2EE, 0x4E048354, 0x3903B3C2,
|
||||
0xA7672661, 0xD06016F7, 0x4969474D, 0x3E6E77DB,
|
||||
0xAED16A4A, 0xD9D65ADC, 0x40DF0B66, 0x37D83BF0,
|
||||
0xA9BCAE53, 0xDEBB9EC5, 0x47B2CF7F, 0x30B5FFE9,
|
||||
0xBDBDF21C, 0xCABAC28A, 0x53B39330, 0x24B4A3A6,
|
||||
0xBAD03605, 0xCDD70693, 0x54DE5729, 0x23D967BF,
|
||||
0xB3667A2E, 0xC4614AB8, 0x5D681B02, 0x2A6F2B94,
|
||||
0xB40BBE37, 0xC30C8EA1, 0x5A05DF1B, 0x2D02EF8D
|
||||
);
|
||||
|
||||
// For this function to yield the same output as PHP's crc32 function, $crc would have to be
|
||||
// set to 0xFFFFFFFF, initially - not 0x00000000 as it currently is.
|
||||
$crc = 0x00000000;
|
||||
$length = strlen($data);
|
||||
|
||||
for ($i=0;$i<$length;$i++) {
|
||||
// We AND $crc >> 8 with 0x00FFFFFF because we want the eight newly added bits to all
|
||||
// be zero. PHP, unfortunately, doesn't always do this. 0x80000000 >> 8, as an example,
|
||||
// yields 0xFF800000 - not 0x00800000. The following link elaborates:
|
||||
// http://www.php.net/manual/en/language.operators.bitwise.php#57281
|
||||
$crc = (($crc >> 8) & 0x00FFFFFF) ^ $crc_lookup_table[($crc & 0xFF) ^ ord($data[$i])];
|
||||
}
|
||||
|
||||
// In addition to having to set $crc to 0xFFFFFFFF, initially, the return value must be XOR'd with
|
||||
// 0xFFFFFFFF for this function to return the same thing that PHP's crc32 function would.
|
||||
return $crc;
|
||||
}
|
||||
|
||||
/**
|
||||
* String Shift
|
||||
*
|
||||
* Inspired by array_shift
|
||||
*
|
||||
* @param String $string
|
||||
* @param optional Integer $index
|
||||
* @return String
|
||||
* @access private
|
||||
*/
|
||||
function _string_shift(&$string, $index = 1)
|
||||
{
|
||||
$substr = substr($string, 0, $index);
|
||||
$string = substr($string, $index);
|
||||
return $substr;
|
||||
}
|
||||
|
||||
/**
|
||||
* RSA Encrypt
|
||||
*
|
||||
* Returns mod(pow($m, $e), $n), where $n should be the product of two (large) primes $p and $q and where $e
|
||||
* should be a number with the property that gcd($e, ($p - 1) * ($q - 1)) == 1. Could just make anything that
|
||||
* calls this call modexp, instead, but I think this makes things clearer, maybe...
|
||||
*
|
||||
* @see Net_SSH1::Net_SSH1()
|
||||
* @param Math_BigInteger $m
|
||||
* @param Array $key
|
||||
* @return Math_BigInteger
|
||||
* @access private
|
||||
*/
|
||||
function _rsa_crypt($m, $key)
|
||||
{
|
||||
/*
|
||||
if (!class_exists('Crypt_RSA')) {
|
||||
require_once('Crypt/RSA.php');
|
||||
}
|
||||
|
||||
$rsa = new Crypt_RSA();
|
||||
$rsa->loadKey($key, CRYPT_RSA_PUBLIC_FORMAT_RAW);
|
||||
$rsa->setEncryptionMode(CRYPT_RSA_ENCRYPTION_PKCS1);
|
||||
return $rsa->encrypt($m);
|
||||
*/
|
||||
|
||||
// To quote from protocol-1.5.txt:
|
||||
// The most significant byte (which is only partial as the value must be
|
||||
// less than the public modulus, which is never a power of two) is zero.
|
||||
//
|
||||
// The next byte contains the value 2 (which stands for public-key
|
||||
// encrypted data in the PKCS standard [PKCS#1]). Then, there are non-
|
||||
// zero random bytes to fill any unused space, a zero byte, and the data
|
||||
// to be encrypted in the least significant bytes, the last byte of the
|
||||
// data in the least significant byte.
|
||||
|
||||
// Presumably the part of PKCS#1 they're refering to is "Section 7.2.1 Encryption Operation",
|
||||
// under "7.2 RSAES-PKCS1-v1.5" and "7 Encryption schemes" of the following URL:
|
||||
// ftp://ftp.rsasecurity.com/pub/pkcs/pkcs-1/pkcs-1v2-1.pdf
|
||||
$temp = chr(0) . chr(2);
|
||||
$modulus = $key[1]->toBytes();
|
||||
$length = strlen($modulus) - strlen($m) - 3;
|
||||
for ($i = 0; $i < $length; $i++) {
|
||||
$temp.= chr(crypt_random(1, 255));
|
||||
}
|
||||
$temp.= chr(0) . $m;
|
||||
|
||||
$m = new Math_BigInteger($temp, 256);
|
||||
$m = $m->modPow($key[0], $key[1]);
|
||||
|
||||
return $m->toBytes();
|
||||
}
|
||||
|
||||
/**
|
||||
* Return the server key public exponent
|
||||
*
|
||||
* Returns, by default, the base-10 representation. If $raw_output is set to true, returns, instead,
|
||||
* the raw bytes. This behavior is similar to PHP's md5() function.
|
||||
*
|
||||
* @param optional Boolean $raw_output
|
||||
* @return String
|
||||
* @access public
|
||||
*/
|
||||
function getServerKeyPublicExponent($raw_output = false)
|
||||
{
|
||||
return $raw_output ? $this->server_key_public_exponent->toBytes() : $this->server_key_public_exponent->toString();
|
||||
}
|
||||
|
||||
/**
|
||||
* Return the server key public modulus
|
||||
*
|
||||
* Returns, by default, the base-10 representation. If $raw_output is set to true, returns, instead,
|
||||
* the raw bytes. This behavior is similar to PHP's md5() function.
|
||||
*
|
||||
* @param optional Boolean $raw_output
|
||||
* @return String
|
||||
* @access public
|
||||
*/
|
||||
function getServerKeyPublicModulus($raw_output = false)
|
||||
{
|
||||
return $raw_output ? $this->server_key_public_modulus->toBytes() : $this->server_key_public_modulus->toString();
|
||||
}
|
||||
|
||||
/**
|
||||
* Return the host key public exponent
|
||||
*
|
||||
* Returns, by default, the base-10 representation. If $raw_output is set to true, returns, instead,
|
||||
* the raw bytes. This behavior is similar to PHP's md5() function.
|
||||
*
|
||||
* @param optional Boolean $raw_output
|
||||
* @return String
|
||||
* @access public
|
||||
*/
|
||||
function getHostKeyPublicExponent($raw_output = false)
|
||||
{
|
||||
return $raw_output ? $this->host_key_public_exponent->toBytes() : $this->host_key_public_exponent->toString();
|
||||
}
|
||||
|
||||
/**
|
||||
* Return the host key public modulus
|
||||
*
|
||||
* Returns, by default, the base-10 representation. If $raw_output is set to true, returns, instead,
|
||||
* the raw bytes. This behavior is similar to PHP's md5() function.
|
||||
*
|
||||
* @param optional Boolean $raw_output
|
||||
* @return String
|
||||
* @access public
|
||||
*/
|
||||
function getHostKeyPublicModulus($raw_output = false)
|
||||
{
|
||||
return $raw_output ? $this->host_key_public_modulus->toBytes() : $this->host_key_public_modulus->toString();
|
||||
}
|
||||
|
||||
/**
|
||||
* Return a list of ciphers supported by SSH1 server.
|
||||
*
|
||||
* Just because a cipher is supported by an SSH1 server doesn't mean it's supported by this library. If $raw_output
|
||||
* is set to true, returns, instead, an array of constants. ie. instead of array('Triple-DES in CBC mode'), you'll
|
||||
* get array(NET_SSH1_CIPHER_3DES).
|
||||
*
|
||||
* @param optional Boolean $raw_output
|
||||
* @return Array
|
||||
* @access public
|
||||
*/
|
||||
function getSupportedCiphers($raw_output = false)
|
||||
{
|
||||
return $raw_output ? array_keys($this->supported_ciphers) : array_values($this->supported_ciphers);
|
||||
}
|
||||
|
||||
/**
|
||||
* Return a list of authentications supported by SSH1 server.
|
||||
*
|
||||
* Just because a cipher is supported by an SSH1 server doesn't mean it's supported by this library. If $raw_output
|
||||
* is set to true, returns, instead, an array of constants. ie. instead of array('password authentication'), you'll
|
||||
* get array(NET_SSH1_AUTH_PASSWORD).
|
||||
*
|
||||
* @param optional Boolean $raw_output
|
||||
* @return Array
|
||||
* @access public
|
||||
*/
|
||||
function getSupportedAuthentications($raw_output = false)
|
||||
{
|
||||
return $raw_output ? array_keys($this->supported_authentications) : array_values($this->supported_authentications);
|
||||
}
|
||||
|
||||
/**
|
||||
* Return the server identification.
|
||||
*
|
||||
* @return String
|
||||
* @access public
|
||||
*/
|
||||
function getServerIdentification()
|
||||
{
|
||||
return rtrim($this->server_identification);
|
||||
}
|
||||
}
|
||||
?>
|
||||
2302
phpsec/Net/SSH2.php
Normal file
2302
phpsec/Net/SSH2.php
Normal file
|
|
@ -0,0 +1,2302 @@
|
|||
<?php
|
||||
/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
|
||||
|
||||
/**
|
||||
* Pure-PHP implementation of SSHv2.
|
||||
*
|
||||
* PHP versions 4 and 5
|
||||
*
|
||||
* Here are some examples of how to use this library:
|
||||
* <code>
|
||||
* <?php
|
||||
* include('Net/SSH2.php');
|
||||
*
|
||||
* $ssh = new Net_SSH2('www.domain.tld');
|
||||
* if (!$ssh->login('username', 'password')) {
|
||||
* exit('Login Failed');
|
||||
* }
|
||||
*
|
||||
* echo $ssh->exec('pwd');
|
||||
* echo $ssh->exec('ls -la');
|
||||
* ?>
|
||||
* </code>
|
||||
*
|
||||
* <code>
|
||||
* <?php
|
||||
* include('Crypt/RSA.php');
|
||||
* include('Net/SSH2.php');
|
||||
*
|
||||
* $key = new Crypt_RSA();
|
||||
* //$key->setPassword('whatever');
|
||||
* $key->loadKey(file_get_contents('privatekey'));
|
||||
*
|
||||
* $ssh = new Net_SSH2('www.domain.tld');
|
||||
* if (!$ssh->login('username', $key)) {
|
||||
* exit('Login Failed');
|
||||
* }
|
||||
*
|
||||
* echo $ssh->exec('pwd');
|
||||
* echo $ssh->exec('ls -la');
|
||||
* ?>
|
||||
* </code>
|
||||
*
|
||||
* LICENSE: This library is free software; you can redistribute it and/or
|
||||
* modify it under the terms of the GNU Lesser General Public
|
||||
* License as published by the Free Software Foundation; either
|
||||
* version 2.1 of the License, or (at your option) any later version.
|
||||
*
|
||||
* This library is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
* Lesser General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU Lesser General Public
|
||||
* License along with this library; if not, write to the Free Software
|
||||
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
|
||||
* MA 02111-1307 USA
|
||||
*
|
||||
* @category Net
|
||||
* @package Net_SSH2
|
||||
* @author Jim Wigginton <terrafrost@php.net>
|
||||
* @copyright MMVII Jim Wigginton
|
||||
* @license http://www.gnu.org/licenses/lgpl.txt
|
||||
* @version $Id: SSH2.php,v 1.46 2010/04/27 21:29:36 terrafrost Exp $
|
||||
* @link http://phpseclib.sourceforge.net
|
||||
*/
|
||||
|
||||
/**
|
||||
* Include Math_BigInteger
|
||||
*
|
||||
* Used to do Diffie-Hellman key exchange and DSA/RSA signature verification.
|
||||
*/
|
||||
require_once('Math/BigInteger.php');
|
||||
|
||||
/**
|
||||
* Include Crypt_Random
|
||||
*/
|
||||
require_once('Crypt/Random.php');
|
||||
|
||||
/**
|
||||
* Include Crypt_Hash
|
||||
*/
|
||||
require_once('Crypt/Hash.php');
|
||||
|
||||
/**
|
||||
* Include Crypt_TripleDES
|
||||
*/
|
||||
require_once('Crypt/TripleDES.php');
|
||||
|
||||
/**
|
||||
* Include Crypt_RC4
|
||||
*/
|
||||
require_once('Crypt/RC4.php');
|
||||
|
||||
/**
|
||||
* Include Crypt_AES
|
||||
*/
|
||||
require_once('Crypt/AES.php');
|
||||
|
||||
/**#@+
|
||||
* Execution Bitmap Masks
|
||||
*
|
||||
* @see Net_SSH2::bitmap
|
||||
* @access private
|
||||
*/
|
||||
define('NET_SSH2_MASK_CONSTRUCTOR', 0x00000001);
|
||||
define('NET_SSH2_MASK_LOGIN', 0x00000002);
|
||||
/**#@-*/
|
||||
|
||||
/**#@+
|
||||
* Channel constants
|
||||
*
|
||||
* RFC4254 refers not to client and server channels but rather to sender and recipient channels. we don't refer
|
||||
* to them in that way because RFC4254 toggles the meaning. the client sends a SSH_MSG_CHANNEL_OPEN message with
|
||||
* a sender channel and the server sends a SSH_MSG_CHANNEL_OPEN_CONFIRMATION in response, with a sender and a
|
||||
* recepient channel. at first glance, you might conclude that SSH_MSG_CHANNEL_OPEN_CONFIRMATION's sender channel
|
||||
* would be the same thing as SSH_MSG_CHANNEL_OPEN's sender channel, but it's not, per this snipet:
|
||||
* The 'recipient channel' is the channel number given in the original
|
||||
* open request, and 'sender channel' is the channel number allocated by
|
||||
* the other side.
|
||||
*
|
||||
* @see Net_SSH2::_send_channel_packet()
|
||||
* @see Net_SSH2::_get_channel_packet()
|
||||
* @access private
|
||||
*/
|
||||
define('NET_SSH2_CHANNEL_EXEC', 0); // PuTTy uses 0x100
|
||||
/**#@-*/
|
||||
|
||||
/**#@+
|
||||
* @access public
|
||||
* @see Net_SSH2::getLog()
|
||||
*/
|
||||
/**
|
||||
* Returns the message numbers
|
||||
*/
|
||||
define('NET_SSH2_LOG_SIMPLE', 1);
|
||||
/**
|
||||
* Returns the message content
|
||||
*/
|
||||
define('NET_SSH2_LOG_COMPLEX', 2);
|
||||
/**#@-*/
|
||||
|
||||
/**
|
||||
* Pure-PHP implementation of SSHv2.
|
||||
*
|
||||
* @author Jim Wigginton <terrafrost@php.net>
|
||||
* @version 0.1.0
|
||||
* @access public
|
||||
* @package Net_SSH2
|
||||
*/
|
||||
class Net_SSH2 {
|
||||
/**
|
||||
* The SSH identifier
|
||||
*
|
||||
* @var String
|
||||
* @access private
|
||||
*/
|
||||
var $identifier = 'SSH-2.0-phpseclib_0.2';
|
||||
|
||||
/**
|
||||
* The Socket Object
|
||||
*
|
||||
* @var Object
|
||||
* @access private
|
||||
*/
|
||||
var $fsock;
|
||||
|
||||
/**
|
||||
* Execution Bitmap
|
||||
*
|
||||
* The bits that are set reprsent functions that have been called already. This is used to determine
|
||||
* if a requisite function has been successfully executed. If not, an error should be thrown.
|
||||
*
|
||||
* @var Integer
|
||||
* @access private
|
||||
*/
|
||||
var $bitmap = 0;
|
||||
|
||||
/**
|
||||
* Error information
|
||||
*
|
||||
* @see Net_SSH2::getErrors()
|
||||
* @see Net_SSH2::getLastError()
|
||||
* @var String
|
||||
* @access private
|
||||
*/
|
||||
var $errors = array();
|
||||
|
||||
/**
|
||||
* Server Identifier
|
||||
*
|
||||
* @see Net_SSH2::getServerIdentification()
|
||||
* @var String
|
||||
* @access private
|
||||
*/
|
||||
var $server_identifier = '';
|
||||
|
||||
/**
|
||||
* Key Exchange Algorithms
|
||||
*
|
||||
* @see Net_SSH2::getKexAlgorithims()
|
||||
* @var Array
|
||||
* @access private
|
||||
*/
|
||||
var $kex_algorithms;
|
||||
|
||||
/**
|
||||
* Server Host Key Algorithms
|
||||
*
|
||||
* @see Net_SSH2::getServerHostKeyAlgorithms()
|
||||
* @var Array
|
||||
* @access private
|
||||
*/
|
||||
var $server_host_key_algorithms;
|
||||
|
||||
/**
|
||||
* Encryption Algorithms: Client to Server
|
||||
*
|
||||
* @see Net_SSH2::getEncryptionAlgorithmsClient2Server()
|
||||
* @var Array
|
||||
* @access private
|
||||
*/
|
||||
var $encryption_algorithms_client_to_server;
|
||||
|
||||
/**
|
||||
* Encryption Algorithms: Server to Client
|
||||
*
|
||||
* @see Net_SSH2::getEncryptionAlgorithmsServer2Client()
|
||||
* @var Array
|
||||
* @access private
|
||||
*/
|
||||
var $encryption_algorithms_server_to_client;
|
||||
|
||||
/**
|
||||
* MAC Algorithms: Client to Server
|
||||
*
|
||||
* @see Net_SSH2::getMACAlgorithmsClient2Server()
|
||||
* @var Array
|
||||
* @access private
|
||||
*/
|
||||
var $mac_algorithms_client_to_server;
|
||||
|
||||
/**
|
||||
* MAC Algorithms: Server to Client
|
||||
*
|
||||
* @see Net_SSH2::getMACAlgorithmsServer2Client()
|
||||
* @var Array
|
||||
* @access private
|
||||
*/
|
||||
var $mac_algorithms_server_to_client;
|
||||
|
||||
/**
|
||||
* Compression Algorithms: Client to Server
|
||||
*
|
||||
* @see Net_SSH2::getCompressionAlgorithmsClient2Server()
|
||||
* @var Array
|
||||
* @access private
|
||||
*/
|
||||
var $compression_algorithms_client_to_server;
|
||||
|
||||
/**
|
||||
* Compression Algorithms: Server to Client
|
||||
*
|
||||
* @see Net_SSH2::getCompressionAlgorithmsServer2Client()
|
||||
* @var Array
|
||||
* @access private
|
||||
*/
|
||||
var $compression_algorithms_server_to_client;
|
||||
|
||||
/**
|
||||
* Languages: Server to Client
|
||||
*
|
||||
* @see Net_SSH2::getLanguagesServer2Client()
|
||||
* @var Array
|
||||
* @access private
|
||||
*/
|
||||
var $languages_server_to_client;
|
||||
|
||||
/**
|
||||
* Languages: Client to Server
|
||||
*
|
||||
* @see Net_SSH2::getLanguagesClient2Server()
|
||||
* @var Array
|
||||
* @access private
|
||||
*/
|
||||
var $languages_client_to_server;
|
||||
|
||||
/**
|
||||
* Block Size for Server to Client Encryption
|
||||
*
|
||||
* "Note that the length of the concatenation of 'packet_length',
|
||||
* 'padding_length', 'payload', and 'random padding' MUST be a multiple
|
||||
* of the cipher block size or 8, whichever is larger. This constraint
|
||||
* MUST be enforced, even when using stream ciphers."
|
||||
*
|
||||
* -- http://tools.ietf.org/html/rfc4253#section-6
|
||||
*
|
||||
* @see Net_SSH2::Net_SSH2()
|
||||
* @see Net_SSH2::_send_binary_packet()
|
||||
* @var Integer
|
||||
* @access private
|
||||
*/
|
||||
var $encrypt_block_size = 8;
|
||||
|
||||
/**
|
||||
* Block Size for Client to Server Encryption
|
||||
*
|
||||
* @see Net_SSH2::Net_SSH2()
|
||||
* @see Net_SSH2::_get_binary_packet()
|
||||
* @var Integer
|
||||
* @access private
|
||||
*/
|
||||
var $decrypt_block_size = 8;
|
||||
|
||||
/**
|
||||
* Server to Client Encryption Object
|
||||
*
|
||||
* @see Net_SSH2::_get_binary_packet()
|
||||
* @var Object
|
||||
* @access private
|
||||
*/
|
||||
var $decrypt = false;
|
||||
|
||||
/**
|
||||
* Client to Server Encryption Object
|
||||
*
|
||||
* @see Net_SSH2::_send_binary_packet()
|
||||
* @var Object
|
||||
* @access private
|
||||
*/
|
||||
var $encrypt = false;
|
||||
|
||||
/**
|
||||
* Client to Server HMAC Object
|
||||
*
|
||||
* @see Net_SSH2::_send_binary_packet()
|
||||
* @var Object
|
||||
* @access private
|
||||
*/
|
||||
var $hmac_create = false;
|
||||
|
||||
/**
|
||||
* Server to Client HMAC Object
|
||||
*
|
||||
* @see Net_SSH2::_get_binary_packet()
|
||||
* @var Object
|
||||
* @access private
|
||||
*/
|
||||
var $hmac_check = false;
|
||||
|
||||
/**
|
||||
* Size of server to client HMAC
|
||||
*
|
||||
* We need to know how big the HMAC will be for the server to client direction so that we know how many bytes to read.
|
||||
* For the client to server side, the HMAC object will make the HMAC as long as it needs to be. All we need to do is
|
||||
* append it.
|
||||
*
|
||||
* @see Net_SSH2::_get_binary_packet()
|
||||
* @var Integer
|
||||
* @access private
|
||||
*/
|
||||
var $hmac_size = false;
|
||||
|
||||
/**
|
||||
* Server Public Host Key
|
||||
*
|
||||
* @see Net_SSH2::getServerPublicHostKey()
|
||||
* @var String
|
||||
* @access private
|
||||
*/
|
||||
var $server_public_host_key;
|
||||
|
||||
/**
|
||||
* Session identifer
|
||||
*
|
||||
* "The exchange hash H from the first key exchange is additionally
|
||||
* used as the session identifier, which is a unique identifier for
|
||||
* this connection."
|
||||
*
|
||||
* -- http://tools.ietf.org/html/rfc4253#section-7.2
|
||||
*
|
||||
* @see Net_SSH2::_key_exchange()
|
||||
* @var String
|
||||
* @access private
|
||||
*/
|
||||
var $session_id = false;
|
||||
|
||||
/**
|
||||
* Message Numbers
|
||||
*
|
||||
* @see Net_SSH2::Net_SSH2()
|
||||
* @var Array
|
||||
* @access private
|
||||
*/
|
||||
var $message_numbers = array();
|
||||
|
||||
/**
|
||||
* Disconnection Message 'reason codes' defined in RFC4253
|
||||
*
|
||||
* @see Net_SSH2::Net_SSH2()
|
||||
* @var Array
|
||||
* @access private
|
||||
*/
|
||||
var $disconnect_reasons = array();
|
||||
|
||||
/**
|
||||
* SSH_MSG_CHANNEL_OPEN_FAILURE 'reason codes', defined in RFC4254
|
||||
*
|
||||
* @see Net_SSH2::Net_SSH2()
|
||||
* @var Array
|
||||
* @access private
|
||||
*/
|
||||
var $channel_open_failure_reasons = array();
|
||||
|
||||
/**
|
||||
* Terminal Modes
|
||||
*
|
||||
* @link http://tools.ietf.org/html/rfc4254#section-8
|
||||
* @see Net_SSH2::Net_SSH2()
|
||||
* @var Array
|
||||
* @access private
|
||||
*/
|
||||
var $terminal_modes = array();
|
||||
|
||||
/**
|
||||
* SSH_MSG_CHANNEL_EXTENDED_DATA's data_type_codes
|
||||
*
|
||||
* @link http://tools.ietf.org/html/rfc4254#section-5.2
|
||||
* @see Net_SSH2::Net_SSH2()
|
||||
* @var Array
|
||||
* @access private
|
||||
*/
|
||||
var $channel_extended_data_type_codes = array();
|
||||
|
||||
/**
|
||||
* Send Sequence Number
|
||||
*
|
||||
* See 'Section 6.4. Data Integrity' of rfc4253 for more info.
|
||||
*
|
||||
* @see Net_SSH2::_send_binary_packet()
|
||||
* @var Integer
|
||||
* @access private
|
||||
*/
|
||||
var $send_seq_no = 0;
|
||||
|
||||
/**
|
||||
* Get Sequence Number
|
||||
*
|
||||
* See 'Section 6.4. Data Integrity' of rfc4253 for more info.
|
||||
*
|
||||
* @see Net_SSH2::_get_binary_packet()
|
||||
* @var Integer
|
||||
* @access private
|
||||
*/
|
||||
var $get_seq_no = 0;
|
||||
|
||||
/**
|
||||
* Server Channels
|
||||
*
|
||||
* Maps client channels to server channels
|
||||
*
|
||||
* @see Net_SSH2::_get_channel_packet()
|
||||
* @see Net_SSH2::exec()
|
||||
* @var Array
|
||||
* @access private
|
||||
*/
|
||||
var $server_channels = array();
|
||||
|
||||
/**
|
||||
* Channel Buffers
|
||||
*
|
||||
* If a client requests a packet from one channel but receives two packets from another those packets should
|
||||
* be placed in a buffer
|
||||
*
|
||||
* @see Net_SSH2::_get_channel_packet()
|
||||
* @see Net_SSH2::exec()
|
||||
* @var Array
|
||||
* @access private
|
||||
*/
|
||||
var $channel_buffers = array();
|
||||
|
||||
/**
|
||||
* Channel Status
|
||||
*
|
||||
* Contains the type of the last sent message
|
||||
*
|
||||
* @see Net_SSH2::_get_channel_packet()
|
||||
* @var Array
|
||||
* @access private
|
||||
*/
|
||||
var $channel_status = array();
|
||||
|
||||
/**
|
||||
* Packet Size
|
||||
*
|
||||
* Maximum packet size indexed by channel
|
||||
*
|
||||
* @see Net_SSH2::_send_channel_packet()
|
||||
* @var Array
|
||||
* @access private
|
||||
*/
|
||||
var $packet_size_client_to_server = array();
|
||||
|
||||
/**
|
||||
* Message Number Log
|
||||
*
|
||||
* @see Net_SSH2::getLog()
|
||||
* @var Array
|
||||
* @access private
|
||||
*/
|
||||
var $message_number_log = array();
|
||||
|
||||
/**
|
||||
* Message Log
|
||||
*
|
||||
* @see Net_SSH2::getLog()
|
||||
* @var Array
|
||||
* @access private
|
||||
*/
|
||||
var $message_log = array();
|
||||
|
||||
/**
|
||||
* The Window Size
|
||||
*
|
||||
* Bytes the other party can send before it must wait for the window to be adjusted (0x7FFFFFFF = 4GB)
|
||||
*
|
||||
* @var Integer
|
||||
* @see Net_SSH2::_send_channel_packet()
|
||||
* @see Net_SSH2::exec()
|
||||
* @access private
|
||||
*/
|
||||
var $window_size = 0x7FFFFFFF;
|
||||
|
||||
/**
|
||||
* Window size
|
||||
*
|
||||
* Window size indexed by channel
|
||||
*
|
||||
* @see Net_SSH2::_send_channel_packet()
|
||||
* @var Array
|
||||
* @access private
|
||||
*/
|
||||
var $window_size_client_to_server = array();
|
||||
|
||||
/**
|
||||
* Server signature
|
||||
*
|
||||
* Verified against $this->session_id
|
||||
*
|
||||
* @see Net_SSH2::getServerPublicHostKey()
|
||||
* @var String
|
||||
* @access private
|
||||
*/
|
||||
var $signature = '';
|
||||
|
||||
/**
|
||||
* Server signature format
|
||||
*
|
||||
* ssh-rsa or ssh-dss.
|
||||
*
|
||||
* @see Net_SSH2::getServerPublicHostKey()
|
||||
* @var String
|
||||
* @access private
|
||||
*/
|
||||
var $signature_format = '';
|
||||
|
||||
/**
|
||||
* Default Constructor.
|
||||
*
|
||||
* Connects to an SSHv2 server
|
||||
*
|
||||
* @param String $host
|
||||
* @param optional Integer $port
|
||||
* @param optional Integer $timeout
|
||||
* @return Net_SSH2
|
||||
* @access public
|
||||
*/
|
||||
function Net_SSH2($host, $port = 22, $timeout = 10)
|
||||
{
|
||||
$this->message_numbers = array(
|
||||
1 => 'NET_SSH2_MSG_DISCONNECT',
|
||||
2 => 'NET_SSH2_MSG_IGNORE',
|
||||
3 => 'NET_SSH2_MSG_UNIMPLEMENTED',
|
||||
4 => 'NET_SSH2_MSG_DEBUG',
|
||||
5 => 'NET_SSH2_MSG_SERVICE_REQUEST',
|
||||
6 => 'NET_SSH2_MSG_SERVICE_ACCEPT',
|
||||
20 => 'NET_SSH2_MSG_KEXINIT',
|
||||
21 => 'NET_SSH2_MSG_NEWKEYS',
|
||||
30 => 'NET_SSH2_MSG_KEXDH_INIT',
|
||||
31 => 'NET_SSH2_MSG_KEXDH_REPLY',
|
||||
50 => 'NET_SSH2_MSG_USERAUTH_REQUEST',
|
||||
51 => 'NET_SSH2_MSG_USERAUTH_FAILURE',
|
||||
52 => 'NET_SSH2_MSG_USERAUTH_SUCCESS',
|
||||
53 => 'NET_SSH2_MSG_USERAUTH_BANNER',
|
||||
|
||||
80 => 'NET_SSH2_MSG_GLOBAL_REQUEST',
|
||||
81 => 'NET_SSH2_MSG_REQUEST_SUCCESS',
|
||||
82 => 'NET_SSH2_MSG_REQUEST_FAILURE',
|
||||
90 => 'NET_SSH2_MSG_CHANNEL_OPEN',
|
||||
91 => 'NET_SSH2_MSG_CHANNEL_OPEN_CONFIRMATION',
|
||||
92 => 'NET_SSH2_MSG_CHANNEL_OPEN_FAILURE',
|
||||
93 => 'NET_SSH2_MSG_CHANNEL_WINDOW_ADJUST',
|
||||
94 => 'NET_SSH2_MSG_CHANNEL_DATA',
|
||||
95 => 'NET_SSH2_MSG_CHANNEL_EXTENDED_DATA',
|
||||
96 => 'NET_SSH2_MSG_CHANNEL_EOF',
|
||||
97 => 'NET_SSH2_MSG_CHANNEL_CLOSE',
|
||||
98 => 'NET_SSH2_MSG_CHANNEL_REQUEST',
|
||||
99 => 'NET_SSH2_MSG_CHANNEL_SUCCESS',
|
||||
100 => 'NET_SSH2_MSG_CHANNEL_FAILURE'
|
||||
);
|
||||
$this->disconnect_reasons = array(
|
||||
1 => 'NET_SSH2_DISCONNECT_HOST_NOT_ALLOWED_TO_CONNECT',
|
||||
2 => 'NET_SSH2_DISCONNECT_PROTOCOL_ERROR',
|
||||
3 => 'NET_SSH2_DISCONNECT_KEY_EXCHANGE_FAILED',
|
||||
4 => 'NET_SSH2_DISCONNECT_RESERVED',
|
||||
5 => 'NET_SSH2_DISCONNECT_MAC_ERROR',
|
||||
6 => 'NET_SSH2_DISCONNECT_COMPRESSION_ERROR',
|
||||
7 => 'NET_SSH2_DISCONNECT_SERVICE_NOT_AVAILABLE',
|
||||
8 => 'NET_SSH2_DISCONNECT_PROTOCOL_VERSION_NOT_SUPPORTED',
|
||||
9 => 'NET_SSH2_DISCONNECT_HOST_KEY_NOT_VERIFIABLE',
|
||||
10 => 'NET_SSH2_DISCONNECT_CONNECTION_LOST',
|
||||
11 => 'NET_SSH2_DISCONNECT_BY_APPLICATION',
|
||||
12 => 'NET_SSH2_DISCONNECT_TOO_MANY_CONNECTIONS',
|
||||
13 => 'NET_SSH2_DISCONNECT_AUTH_CANCELLED_BY_USER',
|
||||
14 => 'NET_SSH2_DISCONNECT_NO_MORE_AUTH_METHODS_AVAILABLE',
|
||||
15 => 'NET_SSH2_DISCONNECT_ILLEGAL_USER_NAME'
|
||||
);
|
||||
$this->channel_open_failure_reasons = array(
|
||||
1 => 'NET_SSH2_OPEN_ADMINISTRATIVELY_PROHIBITED'
|
||||
);
|
||||
$this->terminal_modes = array(
|
||||
0 => 'NET_SSH2_TTY_OP_END'
|
||||
);
|
||||
$this->channel_extended_data_type_codes = array(
|
||||
1 => 'NET_SSH2_EXTENDED_DATA_STDERR'
|
||||
);
|
||||
|
||||
$this->_define_array(
|
||||
$this->message_numbers,
|
||||
$this->disconnect_reasons,
|
||||
$this->channel_open_failure_reasons,
|
||||
$this->terminal_modes,
|
||||
$this->channel_extended_data_type_codes,
|
||||
array(60 => 'NET_SSH2_MSG_USERAUTH_PASSWD_CHANGEREQ'),
|
||||
array(60 => 'NET_SSH2_MSG_USERAUTH_PK_OK')
|
||||
);
|
||||
|
||||
$this->fsock = @fsockopen($host, $port, $errno, $errstr, $timeout);
|
||||
if (!$this->fsock) {
|
||||
user_error(rtrim("Cannot connect to $host. Error $errno. $errstr"), E_USER_NOTICE);
|
||||
return;
|
||||
}
|
||||
|
||||
/* According to the SSH2 specs,
|
||||
|
||||
"The server MAY send other lines of data before sending the version
|
||||
string. Each line SHOULD be terminated by a Carriage Return and Line
|
||||
Feed. Such lines MUST NOT begin with "SSH-", and SHOULD be encoded
|
||||
in ISO-10646 UTF-8 [RFC3629] (language is not specified). Clients
|
||||
MUST be able to process such lines." */
|
||||
$temp = '';
|
||||
$extra = '';
|
||||
while (!feof($this->fsock) && !preg_match('#^SSH-(\d\.\d+)#', $temp, $matches)) {
|
||||
if (substr($temp, -2) == "\r\n") {
|
||||
$extra.= $temp;
|
||||
$temp = '';
|
||||
}
|
||||
$temp.= fgets($this->fsock, 255);
|
||||
}
|
||||
|
||||
$ext = array();
|
||||
if (extension_loaded('mcrypt')) {
|
||||
$ext[] = 'mcrypt';
|
||||
}
|
||||
if (extension_loaded('gmp')) {
|
||||
$ext[] = 'gmp';
|
||||
} else if (extension_loaded('bcmath')) {
|
||||
$ext[] = 'bcmath';
|
||||
}
|
||||
|
||||
if (!empty($ext)) {
|
||||
$this->identifier.= ' (' . implode(', ', $ext) . ')';
|
||||
}
|
||||
|
||||
if (defined('NET_SSH2_LOGGING')) {
|
||||
$this->message_number_log[] = '<-';
|
||||
$this->message_number_log[] = '->';
|
||||
|
||||
if (NET_SSH2_LOGGING == NET_SSH2_LOG_COMPLEX) {
|
||||
$this->message_log[] = $temp;
|
||||
$this->message_log[] = $this->identifier . "\r\n";
|
||||
}
|
||||
}
|
||||
|
||||
$this->server_identifier = trim($temp, "\r\n");
|
||||
if (!empty($extra)) {
|
||||
$this->errors[] = utf8_decode($extra);
|
||||
}
|
||||
|
||||
if ($matches[1] != '1.99' && $matches[1] != '2.0') {
|
||||
user_error("Cannot connect to SSH $matches[1] servers", E_USER_NOTICE);
|
||||
return;
|
||||
}
|
||||
|
||||
fputs($this->fsock, $this->identifier . "\r\n");
|
||||
|
||||
$response = $this->_get_binary_packet();
|
||||
if ($response === false) {
|
||||
user_error('Connection closed by server', E_USER_NOTICE);
|
||||
return;
|
||||
}
|
||||
|
||||
if (ord($response[0]) != NET_SSH2_MSG_KEXINIT) {
|
||||
user_error('Expected SSH_MSG_KEXINIT', E_USER_NOTICE);
|
||||
return;
|
||||
}
|
||||
|
||||
if (!$this->_key_exchange($response)) {
|
||||
return;
|
||||
}
|
||||
|
||||
$this->bitmap = NET_SSH2_MASK_CONSTRUCTOR;
|
||||
}
|
||||
|
||||
/**
|
||||
* Key Exchange
|
||||
*
|
||||
* @param String $kexinit_payload_server
|
||||
* @access private
|
||||
*/
|
||||
function _key_exchange($kexinit_payload_server)
|
||||
{
|
||||
static $kex_algorithms = array(
|
||||
'diffie-hellman-group1-sha1', // REQUIRED
|
||||
'diffie-hellman-group14-sha1' // REQUIRED
|
||||
);
|
||||
|
||||
static $server_host_key_algorithms = array(
|
||||
'ssh-rsa', // RECOMMENDED sign Raw RSA Key
|
||||
'ssh-dss' // REQUIRED sign Raw DSS Key
|
||||
);
|
||||
|
||||
static $encryption_algorithms = array(
|
||||
// from <http://tools.ietf.org/html/rfc4345#section-4>:
|
||||
'arcfour256',
|
||||
'arcfour128',
|
||||
|
||||
'arcfour', // OPTIONAL the ARCFOUR stream cipher with a 128-bit key
|
||||
|
||||
'aes128-cbc', // RECOMMENDED AES with a 128-bit key
|
||||
'aes192-cbc', // OPTIONAL AES with a 192-bit key
|
||||
'aes256-cbc', // OPTIONAL AES in CBC mode, with a 256-bit key
|
||||
|
||||
// from <http://tools.ietf.org/html/rfc4344#section-4>:
|
||||
'aes128-ctr', // RECOMMENDED AES (Rijndael) in SDCTR mode, with 128-bit key
|
||||
'aes192-ctr', // RECOMMENDED AES with 192-bit key
|
||||
'aes256-ctr', // RECOMMENDED AES with 256-bit key
|
||||
'3des-ctr', // RECOMMENDED Three-key 3DES in SDCTR mode
|
||||
|
||||
'3des-cbc', // REQUIRED three-key 3DES in CBC mode
|
||||
'none' // OPTIONAL no encryption; NOT RECOMMENDED
|
||||
);
|
||||
|
||||
static $mac_algorithms = array(
|
||||
'hmac-sha1-96', // RECOMMENDED first 96 bits of HMAC-SHA1 (digest length = 12, key length = 20)
|
||||
'hmac-sha1', // REQUIRED HMAC-SHA1 (digest length = key length = 20)
|
||||
'hmac-md5-96', // OPTIONAL first 96 bits of HMAC-MD5 (digest length = 12, key length = 16)
|
||||
'hmac-md5', // OPTIONAL HMAC-MD5 (digest length = key length = 16)
|
||||
'none' // OPTIONAL no MAC; NOT RECOMMENDED
|
||||
);
|
||||
|
||||
static $compression_algorithms = array(
|
||||
'none' // REQUIRED no compression
|
||||
//'zlib' // OPTIONAL ZLIB (LZ77) compression
|
||||
);
|
||||
|
||||
static $str_kex_algorithms, $str_server_host_key_algorithms,
|
||||
$encryption_algorithms_server_to_client, $mac_algorithms_server_to_client, $compression_algorithms_server_to_client,
|
||||
$encryption_algorithms_client_to_server, $mac_algorithms_client_to_server, $compression_algorithms_client_to_server;
|
||||
|
||||
if (empty($str_kex_algorithms)) {
|
||||
$str_kex_algorithms = implode(',', $kex_algorithms);
|
||||
$str_server_host_key_algorithms = implode(',', $server_host_key_algorithms);
|
||||
$encryption_algorithms_server_to_client = $encryption_algorithms_client_to_server = implode(',', $encryption_algorithms);
|
||||
$mac_algorithms_server_to_client = $mac_algorithms_client_to_server = implode(',', $mac_algorithms);
|
||||
$compression_algorithms_server_to_client = $compression_algorithms_client_to_server = implode(',', $compression_algorithms);
|
||||
}
|
||||
|
||||
$client_cookie = '';
|
||||
for ($i = 0; $i < 16; $i++) {
|
||||
$client_cookie.= chr(crypt_random(0, 255));
|
||||
}
|
||||
|
||||
$response = $kexinit_payload_server;
|
||||
$this->_string_shift($response, 1); // skip past the message number (it should be SSH_MSG_KEXINIT)
|
||||
$server_cookie = $this->_string_shift($response, 16);
|
||||
|
||||
$temp = unpack('Nlength', $this->_string_shift($response, 4));
|
||||
$this->kex_algorithms = explode(',', $this->_string_shift($response, $temp['length']));
|
||||
|
||||
$temp = unpack('Nlength', $this->_string_shift($response, 4));
|
||||
$this->server_host_key_algorithms = explode(',', $this->_string_shift($response, $temp['length']));
|
||||
|
||||
$temp = unpack('Nlength', $this->_string_shift($response, 4));
|
||||
$this->encryption_algorithms_client_to_server = explode(',', $this->_string_shift($response, $temp['length']));
|
||||
|
||||
$temp = unpack('Nlength', $this->_string_shift($response, 4));
|
||||
$this->encryption_algorithms_server_to_client = explode(',', $this->_string_shift($response, $temp['length']));
|
||||
|
||||
$temp = unpack('Nlength', $this->_string_shift($response, 4));
|
||||
$this->mac_algorithms_client_to_server = explode(',', $this->_string_shift($response, $temp['length']));
|
||||
|
||||
$temp = unpack('Nlength', $this->_string_shift($response, 4));
|
||||
$this->mac_algorithms_server_to_client = explode(',', $this->_string_shift($response, $temp['length']));
|
||||
|
||||
$temp = unpack('Nlength', $this->_string_shift($response, 4));
|
||||
$this->compression_algorithms_client_to_server = explode(',', $this->_string_shift($response, $temp['length']));
|
||||
|
||||
$temp = unpack('Nlength', $this->_string_shift($response, 4));
|
||||
$this->compression_algorithms_server_to_client = explode(',', $this->_string_shift($response, $temp['length']));
|
||||
|
||||
$temp = unpack('Nlength', $this->_string_shift($response, 4));
|
||||
$this->languages_client_to_server = explode(',', $this->_string_shift($response, $temp['length']));
|
||||
|
||||
$temp = unpack('Nlength', $this->_string_shift($response, 4));
|
||||
$this->languages_server_to_client = explode(',', $this->_string_shift($response, $temp['length']));
|
||||
|
||||
extract(unpack('Cfirst_kex_packet_follows', $this->_string_shift($response, 1)));
|
||||
$first_kex_packet_follows = $first_kex_packet_follows != 0;
|
||||
|
||||
// the sending of SSH2_MSG_KEXINIT could go in one of two places. this is the second place.
|
||||
$kexinit_payload_client = pack('Ca*Na*Na*Na*Na*Na*Na*Na*Na*Na*Na*CN',
|
||||
NET_SSH2_MSG_KEXINIT, $client_cookie, strlen($str_kex_algorithms), $str_kex_algorithms,
|
||||
strlen($str_server_host_key_algorithms), $str_server_host_key_algorithms, strlen($encryption_algorithms_client_to_server),
|
||||
$encryption_algorithms_client_to_server, strlen($encryption_algorithms_server_to_client), $encryption_algorithms_server_to_client,
|
||||
strlen($mac_algorithms_client_to_server), $mac_algorithms_client_to_server, strlen($mac_algorithms_server_to_client),
|
||||
$mac_algorithms_server_to_client, strlen($compression_algorithms_client_to_server), $compression_algorithms_client_to_server,
|
||||
strlen($compression_algorithms_server_to_client), $compression_algorithms_server_to_client, 0, '', 0, '',
|
||||
0, 0
|
||||
);
|
||||
|
||||
if (!$this->_send_binary_packet($kexinit_payload_client)) {
|
||||
return false;
|
||||
}
|
||||
// here ends the second place.
|
||||
|
||||
// we need to decide upon the symmetric encryption algorithms before we do the diffie-hellman key exchange
|
||||
for ($i = 0; $i < count($encryption_algorithms) && !in_array($encryption_algorithms[$i], $this->encryption_algorithms_server_to_client); $i++);
|
||||
if ($i == count($encryption_algorithms)) {
|
||||
user_error('No compatible server to client encryption algorithms found', E_USER_NOTICE);
|
||||
return $this->_disconnect(NET_SSH2_DISCONNECT_KEY_EXCHANGE_FAILED);
|
||||
}
|
||||
|
||||
// we don't initialize any crypto-objects, yet - we do that, later. for now, we need the lengths to make the
|
||||
// diffie-hellman key exchange as fast as possible
|
||||
$decrypt = $encryption_algorithms[$i];
|
||||
switch ($decrypt) {
|
||||
case '3des-cbc':
|
||||
case '3des-ctr':
|
||||
$decryptKeyLength = 24; // eg. 192 / 8
|
||||
break;
|
||||
case 'aes256-cbc':
|
||||
case 'aes256-ctr':
|
||||
$decryptKeyLength = 32; // eg. 256 / 8
|
||||
break;
|
||||
case 'aes192-cbc':
|
||||
case 'aes192-ctr':
|
||||
$decryptKeyLength = 24; // eg. 192 / 8
|
||||
break;
|
||||
case 'aes128-cbc':
|
||||
case 'aes128-ctr':
|
||||
$decryptKeyLength = 16; // eg. 128 / 8
|
||||
break;
|
||||
case 'arcfour':
|
||||
case 'arcfour128':
|
||||
$decryptKeyLength = 16; // eg. 128 / 8
|
||||
break;
|
||||
case 'arcfour256':
|
||||
$decryptKeyLength = 32; // eg. 128 / 8
|
||||
break;
|
||||
case 'none';
|
||||
$decryptKeyLength = 0;
|
||||
}
|
||||
|
||||
for ($i = 0; $i < count($encryption_algorithms) && !in_array($encryption_algorithms[$i], $this->encryption_algorithms_client_to_server); $i++);
|
||||
if ($i == count($encryption_algorithms)) {
|
||||
user_error('No compatible client to server encryption algorithms found', E_USER_NOTICE);
|
||||
return $this->_disconnect(NET_SSH2_DISCONNECT_KEY_EXCHANGE_FAILED);
|
||||
}
|
||||
|
||||
$encrypt = $encryption_algorithms[$i];
|
||||
switch ($encrypt) {
|
||||
case '3des-cbc':
|
||||
case '3des-ctr':
|
||||
$encryptKeyLength = 24;
|
||||
break;
|
||||
case 'aes256-cbc':
|
||||
case 'aes256-ctr':
|
||||
$encryptKeyLength = 32;
|
||||
break;
|
||||
case 'aes192-cbc':
|
||||
case 'aes192-ctr':
|
||||
$encryptKeyLength = 24;
|
||||
break;
|
||||
case 'aes128-cbc':
|
||||
case 'aes128-ctr':
|
||||
$encryptKeyLength = 16;
|
||||
break;
|
||||
case 'arcfour':
|
||||
case 'arcfour128':
|
||||
$encryptKeyLength = 16;
|
||||
break;
|
||||
case 'arcfour256':
|
||||
$encryptKeyLength = 32;
|
||||
break;
|
||||
case 'none';
|
||||
$encryptKeyLength = 0;
|
||||
}
|
||||
|
||||
$keyLength = $decryptKeyLength > $encryptKeyLength ? $decryptKeyLength : $encryptKeyLength;
|
||||
|
||||
// through diffie-hellman key exchange a symmetric key is obtained
|
||||
for ($i = 0; $i < count($kex_algorithms) && !in_array($kex_algorithms[$i], $this->kex_algorithms); $i++);
|
||||
if ($i == count($kex_algorithms)) {
|
||||
user_error('No compatible key exchange algorithms found', E_USER_NOTICE);
|
||||
return $this->_disconnect(NET_SSH2_DISCONNECT_KEY_EXCHANGE_FAILED);
|
||||
}
|
||||
|
||||
switch ($kex_algorithms[$i]) {
|
||||
// see http://tools.ietf.org/html/rfc2409#section-6.2 and
|
||||
// http://tools.ietf.org/html/rfc2412, appendex E
|
||||
case 'diffie-hellman-group1-sha1':
|
||||
$p = pack('H256', 'FFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD129024E088A67CC74' .
|
||||
'020BBEA63B139B22514A08798E3404DDEF9519B3CD3A431B302B0A6DF25F1437' .
|
||||
'4FE1356D6D51C245E485B576625E7EC6F44C42E9A637ED6B0BFF5CB6F406B7ED' .
|
||||
'EE386BFB5A899FA5AE9F24117C4B1FE649286651ECE65381FFFFFFFFFFFFFFFF');
|
||||
$keyLength = $keyLength < 160 ? $keyLength : 160;
|
||||
$hash = 'sha1';
|
||||
break;
|
||||
// see http://tools.ietf.org/html/rfc3526#section-3
|
||||
case 'diffie-hellman-group14-sha1':
|
||||
$p = pack('H512', 'FFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD129024E088A67CC74' .
|
||||
'020BBEA63B139B22514A08798E3404DDEF9519B3CD3A431B302B0A6DF25F1437' .
|
||||
'4FE1356D6D51C245E485B576625E7EC6F44C42E9A637ED6B0BFF5CB6F406B7ED' .
|
||||
'EE386BFB5A899FA5AE9F24117C4B1FE649286651ECE45B3DC2007CB8A163BF05' .
|
||||
'98DA48361C55D39A69163FA8FD24CF5F83655D23DCA3AD961C62F356208552BB' .
|
||||
'9ED529077096966D670C354E4ABC9804F1746C08CA18217C32905E462E36CE3B' .
|
||||
'E39E772C180E86039B2783A2EC07A28FB5C55DF06F4C52C9DE2BCBF695581718' .
|
||||
'3995497CEA956AE515D2261898FA051015728E5A8AACAA68FFFFFFFFFFFFFFFF');
|
||||
$keyLength = $keyLength < 160 ? $keyLength : 160;
|
||||
$hash = 'sha1';
|
||||
}
|
||||
|
||||
$p = new Math_BigInteger($p, 256);
|
||||
//$q = $p->bitwise_rightShift(1);
|
||||
|
||||
/* To increase the speed of the key exchange, both client and server may
|
||||
reduce the size of their private exponents. It should be at least
|
||||
twice as long as the key material that is generated from the shared
|
||||
secret. For more details, see the paper by van Oorschot and Wiener
|
||||
[VAN-OORSCHOT].
|
||||
|
||||
-- http://tools.ietf.org/html/rfc4419#section-6.2 */
|
||||
$q = new Math_BigInteger(1);
|
||||
$q = $q->bitwise_leftShift(2 * $keyLength);
|
||||
$q = $q->subtract(new Math_BigInteger(1));
|
||||
|
||||
$g = new Math_BigInteger(2);
|
||||
$x = new Math_BigInteger();
|
||||
$x->setRandomGenerator('crypt_random');
|
||||
$x = $x->random(new Math_BigInteger(1), $q);
|
||||
$e = $g->modPow($x, $p);
|
||||
|
||||
$eBytes = $e->toBytes(true);
|
||||
$data = pack('CNa*', NET_SSH2_MSG_KEXDH_INIT, strlen($eBytes), $eBytes);
|
||||
|
||||
if (!$this->_send_binary_packet($data)) {
|
||||
user_error('Connection closed by server', E_USER_NOTICE);
|
||||
return false;
|
||||
}
|
||||
|
||||
$response = $this->_get_binary_packet();
|
||||
if ($response === false) {
|
||||
user_error('Connection closed by server', E_USER_NOTICE);
|
||||
return false;
|
||||
}
|
||||
extract(unpack('Ctype', $this->_string_shift($response, 1)));
|
||||
|
||||
if ($type != NET_SSH2_MSG_KEXDH_REPLY) {
|
||||
user_error('Expected SSH_MSG_KEXDH_REPLY', E_USER_NOTICE);
|
||||
return false;
|
||||
}
|
||||
|
||||
$temp = unpack('Nlength', $this->_string_shift($response, 4));
|
||||
$this->server_public_host_key = $server_public_host_key = $this->_string_shift($response, $temp['length']);
|
||||
|
||||
$temp = unpack('Nlength', $this->_string_shift($server_public_host_key, 4));
|
||||
$public_key_format = $this->_string_shift($server_public_host_key, $temp['length']);
|
||||
|
||||
$temp = unpack('Nlength', $this->_string_shift($response, 4));
|
||||
$fBytes = $this->_string_shift($response, $temp['length']);
|
||||
$f = new Math_BigInteger($fBytes, -256);
|
||||
|
||||
$temp = unpack('Nlength', $this->_string_shift($response, 4));
|
||||
$this->signature = $this->_string_shift($response, $temp['length']);
|
||||
|
||||
$temp = unpack('Nlength', $this->_string_shift($this->signature, 4));
|
||||
$this->signature_format = $this->_string_shift($this->signature, $temp['length']);
|
||||
|
||||
$key = $f->modPow($x, $p);
|
||||
$keyBytes = $key->toBytes(true);
|
||||
|
||||
if ($this->session_id === false) {
|
||||
$source = pack('Na*Na*Na*Na*Na*Na*Na*Na*',
|
||||
strlen($this->identifier), $this->identifier, strlen($this->server_identifier), $this->server_identifier,
|
||||
strlen($kexinit_payload_client), $kexinit_payload_client, strlen($kexinit_payload_server),
|
||||
$kexinit_payload_server, strlen($this->server_public_host_key), $this->server_public_host_key, strlen($eBytes),
|
||||
$eBytes, strlen($fBytes), $fBytes, strlen($keyBytes), $keyBytes
|
||||
);
|
||||
|
||||
$source = pack('H*', $hash($source));
|
||||
|
||||
$this->session_id = $source;
|
||||
}
|
||||
|
||||
for ($i = 0; $i < count($server_host_key_algorithms) && !in_array($server_host_key_algorithms[$i], $this->server_host_key_algorithms); $i++);
|
||||
if ($i == count($server_host_key_algorithms)) {
|
||||
user_error('No compatible server host key algorithms found', E_USER_NOTICE);
|
||||
return $this->_disconnect(NET_SSH2_DISCONNECT_KEY_EXCHANGE_FAILED);
|
||||
}
|
||||
|
||||
if ($public_key_format != $server_host_key_algorithms[$i] || $this->signature_format != $server_host_key_algorithms[$i]) {
|
||||
user_error('Sever Host Key Algorithm Mismatch', E_USER_NOTICE);
|
||||
return $this->_disconnect(NET_SSH2_DISCONNECT_KEY_EXCHANGE_FAILED);
|
||||
}
|
||||
|
||||
$packet = pack('C',
|
||||
NET_SSH2_MSG_NEWKEYS
|
||||
);
|
||||
|
||||
if (!$this->_send_binary_packet($packet)) {
|
||||
return false;
|
||||
}
|
||||
|
||||
$response = $this->_get_binary_packet();
|
||||
|
||||
if ($response === false) {
|
||||
user_error('Connection closed by server', E_USER_NOTICE);
|
||||
return false;
|
||||
}
|
||||
|
||||
extract(unpack('Ctype', $this->_string_shift($response, 1)));
|
||||
|
||||
if ($type != NET_SSH2_MSG_NEWKEYS) {
|
||||
user_error('Expected SSH_MSG_NEWKEYS', E_USER_NOTICE);
|
||||
return false;
|
||||
}
|
||||
|
||||
switch ($encrypt) {
|
||||
case '3des-cbc':
|
||||
$this->encrypt = new Crypt_TripleDES();
|
||||
// $this->encrypt_block_size = 64 / 8 == the default
|
||||
break;
|
||||
case '3des-ctr':
|
||||
$this->encrypt = new Crypt_TripleDES(CRYPT_DES_MODE_CTR);
|
||||
// $this->encrypt_block_size = 64 / 8 == the default
|
||||
break;
|
||||
case 'aes256-cbc':
|
||||
case 'aes192-cbc':
|
||||
case 'aes128-cbc':
|
||||
$this->encrypt = new Crypt_AES();
|
||||
$this->encrypt_block_size = 16; // eg. 128 / 8
|
||||
break;
|
||||
case 'aes256-ctr':
|
||||
case 'aes192-ctr':
|
||||
case 'aes128-ctr':
|
||||
$this->encrypt = new Crypt_AES(CRYPT_AES_MODE_CTR);
|
||||
$this->encrypt_block_size = 16; // eg. 128 / 8
|
||||
break;
|
||||
case 'arcfour':
|
||||
case 'arcfour128':
|
||||
case 'arcfour256':
|
||||
$this->encrypt = new Crypt_RC4();
|
||||
break;
|
||||
case 'none';
|
||||
//$this->encrypt = new Crypt_Null();
|
||||
}
|
||||
|
||||
switch ($decrypt) {
|
||||
case '3des-cbc':
|
||||
$this->decrypt = new Crypt_TripleDES();
|
||||
break;
|
||||
case '3des-ctr':
|
||||
$this->decrypt = new Crypt_TripleDES(CRYPT_DES_MODE_CTR);
|
||||
break;
|
||||
case 'aes256-cbc':
|
||||
case 'aes192-cbc':
|
||||
case 'aes128-cbc':
|
||||
$this->decrypt = new Crypt_AES();
|
||||
$this->decrypt_block_size = 16;
|
||||
break;
|
||||
case 'aes256-ctr':
|
||||
case 'aes192-ctr':
|
||||
case 'aes128-ctr':
|
||||
$this->decrypt = new Crypt_AES(CRYPT_AES_MODE_CTR);
|
||||
$this->decrypt_block_size = 16;
|
||||
break;
|
||||
case 'arcfour':
|
||||
case 'arcfour128':
|
||||
case 'arcfour256':
|
||||
$this->decrypt = new Crypt_RC4();
|
||||
break;
|
||||
case 'none';
|
||||
//$this->decrypt = new Crypt_Null();
|
||||
}
|
||||
|
||||
$keyBytes = pack('Na*', strlen($keyBytes), $keyBytes);
|
||||
|
||||
if ($this->encrypt) {
|
||||
$this->encrypt->enableContinuousBuffer();
|
||||
$this->encrypt->disablePadding();
|
||||
|
||||
$iv = pack('H*', $hash($keyBytes . $this->session_id . 'A' . $this->session_id));
|
||||
while ($this->encrypt_block_size > strlen($iv)) {
|
||||
$iv.= pack('H*', $hash($keyBytes . $this->session_id . $iv));
|
||||
}
|
||||
$this->encrypt->setIV(substr($iv, 0, $this->encrypt_block_size));
|
||||
|
||||
$key = pack('H*', $hash($keyBytes . $this->session_id . 'C' . $this->session_id));
|
||||
while ($encryptKeyLength > strlen($key)) {
|
||||
$key.= pack('H*', $hash($keyBytes . $this->session_id . $key));
|
||||
}
|
||||
$this->encrypt->setKey(substr($key, 0, $encryptKeyLength));
|
||||
}
|
||||
|
||||
if ($this->decrypt) {
|
||||
$this->decrypt->enableContinuousBuffer();
|
||||
$this->decrypt->disablePadding();
|
||||
|
||||
$iv = pack('H*', $hash($keyBytes . $this->session_id . 'B' . $this->session_id));
|
||||
while ($this->decrypt_block_size > strlen($iv)) {
|
||||
$iv.= pack('H*', $hash($keyBytes . $this->session_id . $iv));
|
||||
}
|
||||
$this->decrypt->setIV(substr($iv, 0, $this->decrypt_block_size));
|
||||
|
||||
$key = pack('H*', $hash($keyBytes . $this->session_id . 'D' . $this->session_id));
|
||||
while ($decryptKeyLength > strlen($key)) {
|
||||
$key.= pack('H*', $hash($keyBytes . $this->session_id . $key));
|
||||
}
|
||||
$this->decrypt->setKey(substr($key, 0, $decryptKeyLength));
|
||||
}
|
||||
|
||||
/* The "arcfour128" algorithm is the RC4 cipher, as described in
|
||||
[SCHNEIER], using a 128-bit key. The first 1536 bytes of keystream
|
||||
generated by the cipher MUST be discarded, and the first byte of the
|
||||
first encrypted packet MUST be encrypted using the 1537th byte of
|
||||
keystream.
|
||||
|
||||
-- http://tools.ietf.org/html/rfc4345#section-4 */
|
||||
if ($encrypt == 'arcfour128' || $encrypt == 'arcfour256') {
|
||||
$this->encrypt->encrypt(str_repeat("\0", 1536));
|
||||
}
|
||||
if ($decrypt == 'arcfour128' || $decrypt == 'arcfour256') {
|
||||
$this->decrypt->decrypt(str_repeat("\0", 1536));
|
||||
}
|
||||
|
||||
for ($i = 0; $i < count($mac_algorithms) && !in_array($mac_algorithms[$i], $this->mac_algorithms_client_to_server); $i++);
|
||||
if ($i == count($mac_algorithms)) {
|
||||
user_error('No compatible client to server message authentication algorithms found', E_USER_NOTICE);
|
||||
return $this->_disconnect(NET_SSH2_DISCONNECT_KEY_EXCHANGE_FAILED);
|
||||
}
|
||||
|
||||
$createKeyLength = 0; // ie. $mac_algorithms[$i] == 'none'
|
||||
switch ($mac_algorithms[$i]) {
|
||||
case 'hmac-sha1':
|
||||
$this->hmac_create = new Crypt_Hash('sha1');
|
||||
$createKeyLength = 20;
|
||||
break;
|
||||
case 'hmac-sha1-96':
|
||||
$this->hmac_create = new Crypt_Hash('sha1-96');
|
||||
$createKeyLength = 20;
|
||||
break;
|
||||
case 'hmac-md5':
|
||||
$this->hmac_create = new Crypt_Hash('md5');
|
||||
$createKeyLength = 16;
|
||||
break;
|
||||
case 'hmac-md5-96':
|
||||
$this->hmac_create = new Crypt_Hash('md5-96');
|
||||
$createKeyLength = 16;
|
||||
}
|
||||
|
||||
for ($i = 0; $i < count($mac_algorithms) && !in_array($mac_algorithms[$i], $this->mac_algorithms_server_to_client); $i++);
|
||||
if ($i == count($mac_algorithms)) {
|
||||
user_error('No compatible server to client message authentication algorithms found', E_USER_NOTICE);
|
||||
return $this->_disconnect(NET_SSH2_DISCONNECT_KEY_EXCHANGE_FAILED);
|
||||
}
|
||||
|
||||
$checkKeyLength = 0;
|
||||
$this->hmac_size = 0;
|
||||
switch ($mac_algorithms[$i]) {
|
||||
case 'hmac-sha1':
|
||||
$this->hmac_check = new Crypt_Hash('sha1');
|
||||
$checkKeyLength = 20;
|
||||
$this->hmac_size = 20;
|
||||
break;
|
||||
case 'hmac-sha1-96':
|
||||
$this->hmac_check = new Crypt_Hash('sha1-96');
|
||||
$checkKeyLength = 20;
|
||||
$this->hmac_size = 12;
|
||||
break;
|
||||
case 'hmac-md5':
|
||||
$this->hmac_check = new Crypt_Hash('md5');
|
||||
$checkKeyLength = 16;
|
||||
$this->hmac_size = 16;
|
||||
break;
|
||||
case 'hmac-md5-96':
|
||||
$this->hmac_check = new Crypt_Hash('md5-96');
|
||||
$checkKeyLength = 16;
|
||||
$this->hmac_size = 12;
|
||||
}
|
||||
|
||||
$key = pack('H*', $hash($keyBytes . $this->session_id . 'E' . $this->session_id));
|
||||
while ($createKeyLength > strlen($key)) {
|
||||
$key.= pack('H*', $hash($keyBytes . $this->session_id . $key));
|
||||
}
|
||||
$this->hmac_create->setKey(substr($key, 0, $createKeyLength));
|
||||
|
||||
$key = pack('H*', $hash($keyBytes . $this->session_id . 'F' . $this->session_id));
|
||||
while ($checkKeyLength > strlen($key)) {
|
||||
$key.= pack('H*', $hash($keyBytes . $this->session_id . $key));
|
||||
}
|
||||
$this->hmac_check->setKey(substr($key, 0, $checkKeyLength));
|
||||
|
||||
for ($i = 0; $i < count($compression_algorithms) && !in_array($compression_algorithms[$i], $this->compression_algorithms_server_to_client); $i++);
|
||||
if ($i == count($compression_algorithms)) {
|
||||
user_error('No compatible server to client compression algorithms found', E_USER_NOTICE);
|
||||
return $this->_disconnect(NET_SSH2_DISCONNECT_KEY_EXCHANGE_FAILED);
|
||||
}
|
||||
$this->decompress = $compression_algorithms[$i] == 'zlib';
|
||||
|
||||
for ($i = 0; $i < count($compression_algorithms) && !in_array($compression_algorithms[$i], $this->compression_algorithms_client_to_server); $i++);
|
||||
if ($i == count($compression_algorithms)) {
|
||||
user_error('No compatible client to server compression algorithms found', E_USER_NOTICE);
|
||||
return $this->_disconnect(NET_SSH2_DISCONNECT_KEY_EXCHANGE_FAILED);
|
||||
}
|
||||
$this->compress = $compression_algorithms[$i] == 'zlib';
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
/**
|
||||
* Login
|
||||
*
|
||||
* @param String $username
|
||||
* @param optional String $password
|
||||
* @return Boolean
|
||||
* @access public
|
||||
* @internal It might be worthwhile, at some point, to protect against {@link http://tools.ietf.org/html/rfc4251#section-9.3.9 traffic analysis}
|
||||
* by sending dummy SSH_MSG_IGNORE messages.
|
||||
*/
|
||||
function login($username, $password = '')
|
||||
{
|
||||
if (!($this->bitmap & NET_SSH2_MASK_CONSTRUCTOR)) {
|
||||
return false;
|
||||
}
|
||||
|
||||
$packet = pack('CNa*',
|
||||
NET_SSH2_MSG_SERVICE_REQUEST, strlen('ssh-userauth'), 'ssh-userauth'
|
||||
);
|
||||
|
||||
if (!$this->_send_binary_packet($packet)) {
|
||||
return false;
|
||||
}
|
||||
|
||||
$response = $this->_get_binary_packet();
|
||||
if ($response === false) {
|
||||
user_error('Connection closed by server', E_USER_NOTICE);
|
||||
return false;
|
||||
}
|
||||
|
||||
extract(unpack('Ctype', $this->_string_shift($response, 1)));
|
||||
|
||||
if ($type != NET_SSH2_MSG_SERVICE_ACCEPT) {
|
||||
user_error('Expected SSH_MSG_SERVICE_ACCEPT', E_USER_NOTICE);
|
||||
return false;
|
||||
}
|
||||
|
||||
// although PHP5's get_class() preserves the case, PHP4's does not
|
||||
if (is_object($password) && strtolower(get_class($password)) == 'crypt_rsa') {
|
||||
return $this->_privatekey_login($username, $password);
|
||||
}
|
||||
|
||||
$utf8_password = utf8_encode($password);
|
||||
$packet = pack('CNa*Na*Na*CNa*',
|
||||
NET_SSH2_MSG_USERAUTH_REQUEST, strlen($username), $username, strlen('ssh-connection'), 'ssh-connection',
|
||||
strlen('password'), 'password', 0, strlen($utf8_password), $utf8_password
|
||||
);
|
||||
|
||||
if (!$this->_send_binary_packet($packet)) {
|
||||
return false;
|
||||
}
|
||||
|
||||
// remove the username and password from the last logged packet
|
||||
if (defined('NET_SSH2_LOGGING') && NET_SSH2_LOGGING == NET_SSH2_LOG_COMPLEX) {
|
||||
$packet = pack('CNa*Na*Na*CNa*',
|
||||
NET_SSH2_MSG_USERAUTH_REQUEST, strlen('username'), 'username', strlen('ssh-connection'), 'ssh-connection',
|
||||
strlen('password'), 'password', 0, strlen('password'), 'password'
|
||||
);
|
||||
$this->message_log[count($this->message_log) - 1] = $packet;
|
||||
}
|
||||
|
||||
$response = $this->_get_binary_packet();
|
||||
if ($response === false) {
|
||||
user_error('Connection closed by server', E_USER_NOTICE);
|
||||
return false;
|
||||
}
|
||||
|
||||
extract(unpack('Ctype', $this->_string_shift($response, 1)));
|
||||
|
||||
switch ($type) {
|
||||
case NET_SSH2_MSG_USERAUTH_PASSWD_CHANGEREQ: // in theory, the password can be changed
|
||||
if (defined('NET_SSH2_LOGGING')) {
|
||||
$this->message_number_log[count($this->message_number_log) - 1] = 'NET_SSH2_MSG_USERAUTH_PASSWD_CHANGEREQ';
|
||||
}
|
||||
extract(unpack('Nlength', $this->_string_shift($response, 4)));
|
||||
$this->errors[] = 'SSH_MSG_USERAUTH_PASSWD_CHANGEREQ: ' . utf8_decode($this->_string_shift($response, $length));
|
||||
return $this->_disconnect(NET_SSH2_DISCONNECT_AUTH_CANCELLED_BY_USER);
|
||||
case NET_SSH2_MSG_USERAUTH_FAILURE:
|
||||
// either the login is bad or the server employees multi-factor authentication
|
||||
return false;
|
||||
case NET_SSH2_MSG_USERAUTH_SUCCESS:
|
||||
$this->bitmap |= NET_SSH2_MASK_LOGIN;
|
||||
return true;
|
||||
}
|
||||
|
||||
return false;
|
||||
}
|
||||
|
||||
/**
|
||||
* Login with an RSA private key
|
||||
*
|
||||
* @param String $username
|
||||
* @param Crypt_RSA $password
|
||||
* @return Boolean
|
||||
* @access private
|
||||
* @internal It might be worthwhile, at some point, to protect against {@link http://tools.ietf.org/html/rfc4251#section-9.3.9 traffic analysis}
|
||||
* by sending dummy SSH_MSG_IGNORE messages.
|
||||
*/
|
||||
function _privatekey_login($username, $privatekey)
|
||||
{
|
||||
// see http://tools.ietf.org/html/rfc4253#page-15
|
||||
$publickey = $privatekey->getPublicKey(CRYPT_RSA_PUBLIC_FORMAT_RAW);
|
||||
if ($publickey === false) {
|
||||
return false;
|
||||
}
|
||||
|
||||
$publickey = array(
|
||||
'e' => $publickey['e']->toBytes(true),
|
||||
'n' => $publickey['n']->toBytes(true)
|
||||
);
|
||||
$publickey = pack('Na*Na*Na*',
|
||||
strlen('ssh-rsa'), 'ssh-rsa', strlen($publickey['e']), $publickey['e'], strlen($publickey['n']), $publickey['n']
|
||||
);
|
||||
|
||||
$part1 = pack('CNa*Na*Na*',
|
||||
NET_SSH2_MSG_USERAUTH_REQUEST, strlen($username), $username, strlen('ssh-connection'), 'ssh-connection',
|
||||
strlen('publickey'), 'publickey'
|
||||
);
|
||||
$part2 = pack('Na*Na*', strlen('ssh-rsa'), 'ssh-rsa', strlen($publickey), $publickey);
|
||||
|
||||
$packet = $part1 . chr(0) . $part2;
|
||||
|
||||
if (!$this->_send_binary_packet($packet)) {
|
||||
return false;
|
||||
}
|
||||
|
||||
$response = $this->_get_binary_packet();
|
||||
if ($response === false) {
|
||||
user_error('Connection closed by server', E_USER_NOTICE);
|
||||
return false;
|
||||
}
|
||||
|
||||
extract(unpack('Ctype', $this->_string_shift($response, 1)));
|
||||
|
||||
switch ($type) {
|
||||
case NET_SSH2_MSG_USERAUTH_FAILURE:
|
||||
extract(unpack('Nlength', $this->_string_shift($response, 4)));
|
||||
$this->errors[] = 'SSH_MSG_USERAUTH_FAILURE: ' . $this->_string_shift($response, $length);
|
||||
return $this->_disconnect(NET_SSH2_DISCONNECT_AUTH_CANCELLED_BY_USER);
|
||||
case NET_SSH2_MSG_USERAUTH_PK_OK:
|
||||
// we'll just take it on faith that the public key blob and the public key algorithm name are as
|
||||
// they should be
|
||||
if (defined('NET_SSH2_LOGGING')) {
|
||||
$this->message_number_log[count($this->message_number_log) - 1] = 'NET_SSH2_MSG_USERAUTH_PK_OK';
|
||||
}
|
||||
}
|
||||
|
||||
$packet = $part1 . chr(1) . $part2;
|
||||
$privatekey->setSignatureMode(CRYPT_RSA_SIGNATURE_PKCS1);
|
||||
$signature = $privatekey->sign(pack('Na*a*', strlen($this->session_id), $this->session_id, $packet));
|
||||
$signature = pack('Na*Na*', strlen('ssh-rsa'), 'ssh-rsa', strlen($signature), $signature);
|
||||
$packet.= pack('Na*', strlen($signature), $signature);
|
||||
|
||||
if (!$this->_send_binary_packet($packet)) {
|
||||
return false;
|
||||
}
|
||||
|
||||
$response = $this->_get_binary_packet();
|
||||
if ($response === false) {
|
||||
user_error('Connection closed by server', E_USER_NOTICE);
|
||||
return false;
|
||||
}
|
||||
|
||||
extract(unpack('Ctype', $this->_string_shift($response, 1)));
|
||||
|
||||
switch ($type) {
|
||||
case NET_SSH2_MSG_USERAUTH_FAILURE:
|
||||
// either the login is bad or the server employees multi-factor authentication
|
||||
return false;
|
||||
case NET_SSH2_MSG_USERAUTH_SUCCESS:
|
||||
$this->bitmap |= NET_SSH2_MASK_LOGIN;
|
||||
return true;
|
||||
}
|
||||
|
||||
return false;
|
||||
}
|
||||
|
||||
/**
|
||||
* Execute Command
|
||||
*
|
||||
* @param String $command
|
||||
* @return String
|
||||
* @access public
|
||||
*/
|
||||
function exec($command)
|
||||
{
|
||||
if (!($this->bitmap & NET_SSH2_MASK_LOGIN)) {
|
||||
return false;
|
||||
}
|
||||
|
||||
// RFC4254 defines the (client) window size as "bytes the other party can send before it must wait for the window to
|
||||
// be adjusted". 0x7FFFFFFF is, at 4GB, the max size. technically, it should probably be decremented, but,
|
||||
// honestly, if you're transfering more than 4GB, you probably shouldn't be using phpseclib, anyway.
|
||||
// see http://tools.ietf.org/html/rfc4254#section-5.2 for more info
|
||||
$this->window_size_client_to_server[NET_SSH2_CHANNEL_EXEC] = 0x7FFFFFFF;
|
||||
// 0x8000 is the maximum max packet size, per http://tools.ietf.org/html/rfc4253#section-6.1, although since PuTTy
|
||||
// uses 0x4000, that's what will be used here, as well.
|
||||
$packet_size = 0x4000;
|
||||
|
||||
$packet = pack('CNa*N3',
|
||||
NET_SSH2_MSG_CHANNEL_OPEN, strlen('session'), 'session', NET_SSH2_CHANNEL_EXEC, $this->window_size_client_to_server[NET_SSH2_CHANNEL_EXEC], $packet_size);
|
||||
|
||||
if (!$this->_send_binary_packet($packet)) {
|
||||
return false;
|
||||
}
|
||||
|
||||
$this->channel_status[NET_SSH2_CHANNEL_EXEC] = NET_SSH2_MSG_CHANNEL_OPEN;
|
||||
|
||||
$response = $this->_get_channel_packet(NET_SSH2_CHANNEL_EXEC);
|
||||
if ($response === false) {
|
||||
return false;
|
||||
}
|
||||
|
||||
// sending a pty-req SSH_MSG_CHANNEL_REQUEST message is unnecessary and, in fact, in most cases, slows things
|
||||
// down. the one place where it might be desirable is if you're doing something like Net_SSH2::exec('ping localhost &').
|
||||
// with a pty-req SSH_MSG_cHANNEL_REQUEST, exec() will return immediately and the ping process will then
|
||||
// then immediately terminate. without such a request exec() will loop indefinitely. the ping process won't end but
|
||||
// neither will your script.
|
||||
|
||||
// although, in theory, the size of SSH_MSG_CHANNEL_REQUEST could exceed the maximum packet size established by
|
||||
// SSH_MSG_CHANNEL_OPEN_CONFIRMATION, RFC4254#section-5.1 states that the "maximum packet size" refers to the
|
||||
// "maximum size of an individual data packet". ie. SSH_MSG_CHANNEL_DATA. RFC4254#section-5.2 corroborates.
|
||||
$packet = pack('CNNa*CNa*',
|
||||
NET_SSH2_MSG_CHANNEL_REQUEST, $this->server_channels[NET_SSH2_CHANNEL_EXEC], strlen('exec'), 'exec', 1, strlen($command), $command);
|
||||
if (!$this->_send_binary_packet($packet)) {
|
||||
return false;
|
||||
}
|
||||
|
||||
$this->channel_status[NET_SSH2_CHANNEL_EXEC] = NET_SSH2_MSG_CHANNEL_REQUEST;
|
||||
|
||||
$response = $this->_get_channel_packet(NET_SSH2_CHANNEL_EXEC);
|
||||
if ($response === false) {
|
||||
return false;
|
||||
}
|
||||
|
||||
$this->channel_status[NET_SSH2_CHANNEL_EXEC] = NET_SSH2_MSG_CHANNEL_DATA;
|
||||
|
||||
$output = '';
|
||||
while (true) {
|
||||
$temp = $this->_get_channel_packet(NET_SSH2_CHANNEL_EXEC);
|
||||
switch (true) {
|
||||
case $temp === true:
|
||||
return $output;
|
||||
case $temp === false:
|
||||
return false;
|
||||
default:
|
||||
$output.= $temp;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Disconnect
|
||||
*
|
||||
* @access public
|
||||
*/
|
||||
function disconnect()
|
||||
{
|
||||
$this->_disconnect(NET_SSH2_DISCONNECT_BY_APPLICATION);
|
||||
}
|
||||
|
||||
/**
|
||||
* Destructor.
|
||||
*
|
||||
* Will be called, automatically, if you're supporting just PHP5. If you're supporting PHP4, you'll need to call
|
||||
* disconnect().
|
||||
*
|
||||
* @access public
|
||||
*/
|
||||
function __destruct()
|
||||
{
|
||||
$this->disconnect();
|
||||
}
|
||||
|
||||
/**
|
||||
* Gets Binary Packets
|
||||
*
|
||||
* See '6. Binary Packet Protocol' of rfc4253 for more info.
|
||||
*
|
||||
* @see Net_SSH2::_send_binary_packet()
|
||||
* @return String
|
||||
* @access private
|
||||
*/
|
||||
function _get_binary_packet()
|
||||
{
|
||||
if (feof($this->fsock)) {
|
||||
user_error('Connection closed prematurely', E_USER_NOTICE);
|
||||
return false;
|
||||
}
|
||||
|
||||
$start = strtok(microtime(), ' ') + strtok(''); // http://php.net/microtime#61838
|
||||
$raw = fread($this->fsock, $this->decrypt_block_size);
|
||||
$stop = strtok(microtime(), ' ') + strtok('');
|
||||
|
||||
if ($this->decrypt !== false) {
|
||||
$raw = $this->decrypt->decrypt($raw);
|
||||
}
|
||||
|
||||
extract(unpack('Npacket_length/Cpadding_length', $this->_string_shift($raw, 5)));
|
||||
|
||||
$remaining_length = $packet_length + 4 - $this->decrypt_block_size;
|
||||
$buffer = '';
|
||||
while ($remaining_length > 0) {
|
||||
$temp = fread($this->fsock, $remaining_length);
|
||||
$buffer.= $temp;
|
||||
$remaining_length-= strlen($temp);
|
||||
}
|
||||
if (!empty($buffer)) {
|
||||
$raw.= $this->decrypt !== false ? $this->decrypt->decrypt($buffer) : $buffer;
|
||||
$buffer = $temp = '';
|
||||
}
|
||||
|
||||
$payload = $this->_string_shift($raw, $packet_length - $padding_length - 1);
|
||||
$padding = $this->_string_shift($raw, $padding_length); // should leave $raw empty
|
||||
|
||||
if ($this->hmac_check !== false) {
|
||||
$hmac = fread($this->fsock, $this->hmac_size);
|
||||
if ($hmac != $this->hmac_check->hash(pack('NNCa*', $this->get_seq_no, $packet_length, $padding_length, $payload . $padding))) {
|
||||
user_error('Invalid HMAC', E_USER_NOTICE);
|
||||
return false;
|
||||
}
|
||||
}
|
||||
|
||||
//if ($this->decompress) {
|
||||
// $payload = gzinflate(substr($payload, 2));
|
||||
//}
|
||||
|
||||
$this->get_seq_no++;
|
||||
|
||||
if (defined('NET_SSH2_LOGGING')) {
|
||||
$temp = isset($this->message_numbers[ord($payload[0])]) ? $this->message_numbers[ord($payload[0])] : 'UNKNOWN';
|
||||
$this->message_number_log[] = '<- ' . $temp .
|
||||
' (' . round($stop - $start, 4) . 's)';
|
||||
if (NET_SSH2_LOGGING == NET_SSH2_LOG_COMPLEX) {
|
||||
$this->message_log[] = substr($payload, 1);
|
||||
}
|
||||
}
|
||||
|
||||
return $this->_filter($payload);
|
||||
}
|
||||
|
||||
/**
|
||||
* Filter Binary Packets
|
||||
*
|
||||
* Because some binary packets need to be ignored...
|
||||
*
|
||||
* @see Net_SSH2::_get_binary_packet()
|
||||
* @return String
|
||||
* @access private
|
||||
*/
|
||||
function _filter($payload)
|
||||
{
|
||||
switch (ord($payload[0])) {
|
||||
case NET_SSH2_MSG_DISCONNECT:
|
||||
$this->_string_shift($payload, 1);
|
||||
extract(unpack('Nreason_code/Nlength', $this->_string_shift($payload, 8)));
|
||||
$this->errors[] = 'SSH_MSG_DISCONNECT: ' . $this->disconnect_reasons[$reason_code] . "\r\n" . utf8_decode($this->_string_shift($payload, $length));
|
||||
$this->bitmask = 0;
|
||||
return false;
|
||||
case NET_SSH2_MSG_IGNORE:
|
||||
$payload = $this->_get_binary_packet();
|
||||
break;
|
||||
case NET_SSH2_MSG_DEBUG:
|
||||
$this->_string_shift($payload, 2);
|
||||
extract(unpack('Nlength', $this->_string_shift($payload, 4)));
|
||||
$this->errors[] = 'SSH_MSG_DEBUG: ' . utf8_decode($this->_string_shift($payload, $length));
|
||||
$payload = $this->_get_binary_packet();
|
||||
break;
|
||||
case NET_SSH2_MSG_UNIMPLEMENTED:
|
||||
return false;
|
||||
case NET_SSH2_MSG_KEXINIT:
|
||||
if ($this->session_id !== false) {
|
||||
if (!$this->_key_exchange($payload)) {
|
||||
$this->bitmask = 0;
|
||||
return false;
|
||||
}
|
||||
$payload = $this->_get_binary_packet();
|
||||
}
|
||||
}
|
||||
|
||||
// see http://tools.ietf.org/html/rfc4252#section-5.4; only called when the encryption has been activated and when we haven't already logged in
|
||||
if (($this->bitmap & NET_SSH2_MASK_CONSTRUCTOR) && !($this->bitmap & NET_SSH2_MASK_LOGIN) && ord($payload[0]) == NET_SSH2_MSG_USERAUTH_BANNER) {
|
||||
$this->_string_shift($payload, 1);
|
||||
extract(unpack('Nlength', $this->_string_shift($payload, 4)));
|
||||
$this->errors[] = 'SSH_MSG_USERAUTH_BANNER: ' . utf8_decode($this->_string_shift($payload, $length));
|
||||
$payload = $this->_get_binary_packet();
|
||||
}
|
||||
|
||||
// only called when we've already logged in
|
||||
if (($this->bitmap & NET_SSH2_MASK_CONSTRUCTOR) && ($this->bitmap & NET_SSH2_MASK_LOGIN)) {
|
||||
switch (ord($payload[0])) {
|
||||
case NET_SSH2_MSG_GLOBAL_REQUEST: // see http://tools.ietf.org/html/rfc4254#section-4
|
||||
$this->_string_shift($payload, 1);
|
||||
extract(unpack('Nlength', $this->_string_shift($payload)));
|
||||
$this->errors[] = 'SSH_MSG_GLOBAL_REQUEST: ' . utf8_decode($this->_string_shift($payload, $length));
|
||||
|
||||
if (!$this->_send_binary_packet(pack('C', NET_SSH2_MSG_REQUEST_FAILURE))) {
|
||||
return $this->_disconnect(NET_SSH2_DISCONNECT_BY_APPLICATION);
|
||||
}
|
||||
|
||||
$payload = $this->_get_binary_packet();
|
||||
break;
|
||||
case NET_SSH2_MSG_CHANNEL_OPEN: // see http://tools.ietf.org/html/rfc4254#section-5.1
|
||||
$this->_string_shift($payload, 1);
|
||||
extract(unpack('N', $this->_string_shift($payload, 4)));
|
||||
$this->errors[] = 'SSH_MSG_CHANNEL_OPEN: ' . utf8_decode($this->_string_shift($payload, $length));
|
||||
|
||||
$this->_string_shift($payload, 4); // skip over client channel
|
||||
extract(unpack('Nserver_channel', $this->_string_shift($payload, 4)));
|
||||
|
||||
$packet = pack('CN3a*Na*',
|
||||
NET_SSH2_MSG_REQUEST_FAILURE, $server_channel, NET_SSH2_OPEN_ADMINISTRATIVELY_PROHIBITED, 0, '', 0, '');
|
||||
|
||||
if (!$this->_send_binary_packet($packet)) {
|
||||
return $this->_disconnect(NET_SSH2_DISCONNECT_BY_APPLICATION);
|
||||
}
|
||||
|
||||
$payload = $this->_get_binary_packet();
|
||||
break;
|
||||
case NET_SSH2_MSG_CHANNEL_WINDOW_ADJUST:
|
||||
$payload = $this->_get_binary_packet();
|
||||
}
|
||||
}
|
||||
|
||||
return $payload;
|
||||
}
|
||||
|
||||
/**
|
||||
* Gets channel data
|
||||
*
|
||||
* Returns the data as a string if it's available and false if not.
|
||||
*
|
||||
* @param $client_channel
|
||||
* @return Mixed
|
||||
* @access private
|
||||
*/
|
||||
function _get_channel_packet($client_channel)
|
||||
{
|
||||
if (!empty($this->channel_buffers[$client_channel])) {
|
||||
return array_shift($this->channel_buffers[$client_channel]);
|
||||
}
|
||||
|
||||
while (true) {
|
||||
$response = $this->_get_binary_packet();
|
||||
if ($response === false) {
|
||||
user_error('Connection closed by server', E_USER_NOTICE);
|
||||
return false;
|
||||
}
|
||||
|
||||
extract(unpack('Ctype/Nchannel', $this->_string_shift($response, 5)));
|
||||
|
||||
switch ($this->channel_status[$channel]) {
|
||||
case NET_SSH2_MSG_CHANNEL_OPEN:
|
||||
switch ($type) {
|
||||
case NET_SSH2_MSG_CHANNEL_OPEN_CONFIRMATION:
|
||||
extract(unpack('Nserver_channel', $this->_string_shift($response, 4)));
|
||||
$this->server_channels[$client_channel] = $server_channel;
|
||||
$this->_string_shift($response, 4); // skip over (server) window size
|
||||
$temp = unpack('Npacket_size_client_to_server', $this->_string_shift($response, 4));
|
||||
$this->packet_size_client_to_server[$client_channel] = $temp['packet_size_client_to_server'];
|
||||
return true;
|
||||
//case NET_SSH2_MSG_CHANNEL_OPEN_FAILURE:
|
||||
default:
|
||||
user_error('Unable to open channel', E_USER_NOTICE);
|
||||
return $this->_disconnect(NET_SSH2_DISCONNECT_BY_APPLICATION);
|
||||
}
|
||||
break;
|
||||
case NET_SSH2_MSG_CHANNEL_REQUEST:
|
||||
switch ($type) {
|
||||
case NET_SSH2_MSG_CHANNEL_SUCCESS:
|
||||
return true;
|
||||
//case NET_SSH2_MSG_CHANNEL_FAILURE:
|
||||
default:
|
||||
user_error('Unable to request pseudo-terminal', E_USER_NOTICE);
|
||||
return $this->_disconnect(NET_SSH2_DISCONNECT_BY_APPLICATION);
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
switch ($type) {
|
||||
case NET_SSH2_MSG_CHANNEL_DATA:
|
||||
if ($client_channel == NET_SSH2_CHANNEL_EXEC) {
|
||||
// SCP requires null packets, such as this, be sent. further, in the case of the ssh.com SSH server
|
||||
// this actually seems to make things twice as fast. more to the point, the message right after
|
||||
// SSH_MSG_CHANNEL_DATA (usually SSH_MSG_IGNORE) won't block for as long as it would have otherwise.
|
||||
// in OpenSSH it slows things down but only by a couple thousandths of a second.
|
||||
$this->_send_channel_packet($client_channel, chr(0));
|
||||
}
|
||||
extract(unpack('Nlength', $this->_string_shift($response, 4)));
|
||||
$data = $this->_string_shift($response, $length);
|
||||
if ($client_channel == $channel) {
|
||||
return $data;
|
||||
}
|
||||
if (!isset($this->channel_buffers[$client_channel])) {
|
||||
$this->channel_buffers[$client_channel] = array();
|
||||
}
|
||||
$this->channel_buffers[$client_channel][] = $data;
|
||||
break;
|
||||
case NET_SSH2_MSG_CHANNEL_EXTENDED_DATA:
|
||||
if ($client_channel == NET_SSH2_CHANNEL_EXEC) {
|
||||
$this->_send_channel_packet($client_channel, chr(0));
|
||||
}
|
||||
// currently, there's only one possible value for $data_type_code: NET_SSH2_EXTENDED_DATA_STDERR
|
||||
extract(unpack('Ndata_type_code/Nlength', $this->_string_shift($response, 8)));
|
||||
$data = $this->_string_shift($response, $length);
|
||||
if ($client_channel == $channel) {
|
||||
return $data;
|
||||
}
|
||||
if (!isset($this->channel_buffers[$client_channel])) {
|
||||
$this->channel_buffers[$client_channel] = array();
|
||||
}
|
||||
$this->channel_buffers[$client_channel][] = $data;
|
||||
break;
|
||||
case NET_SSH2_MSG_CHANNEL_REQUEST:
|
||||
extract(unpack('Nlength', $this->_string_shift($response, 4)));
|
||||
$value = $this->_string_shift($response, $length);
|
||||
switch ($value) {
|
||||
case 'exit-signal':
|
||||
$this->_string_shift($response, 1);
|
||||
extract(unpack('Nlength', $this->_string_shift($response, 4)));
|
||||
$this->errors[] = 'SSH_MSG_CHANNEL_REQUEST (exit-signal): ' . $this->_string_shift($response, $length);
|
||||
$this->_string_shift($response, 1);
|
||||
extract(unpack('Nlength', $this->_string_shift($response, 4)));
|
||||
if ($length) {
|
||||
$this->errors[count($this->errors)].= "\r\n" . $this->_string_shift($response, $length);
|
||||
}
|
||||
//case 'exit-status':
|
||||
default:
|
||||
// "Some systems may not implement signals, in which case they SHOULD ignore this message."
|
||||
// -- http://tools.ietf.org/html/rfc4254#section-6.9
|
||||
break;
|
||||
}
|
||||
break;
|
||||
case NET_SSH2_MSG_CHANNEL_CLOSE:
|
||||
$this->_send_binary_packet(pack('CN', NET_SSH2_MSG_CHANNEL_CLOSE, $this->server_channels[$channel]));
|
||||
return true;
|
||||
case NET_SSH2_MSG_CHANNEL_EOF:
|
||||
break;
|
||||
default:
|
||||
user_error('Error reading channel data', E_USER_NOTICE);
|
||||
return $this->_disconnect(NET_SSH2_DISCONNECT_BY_APPLICATION);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Sends Binary Packets
|
||||
*
|
||||
* See '6. Binary Packet Protocol' of rfc4253 for more info.
|
||||
*
|
||||
* @param String $data
|
||||
* @see Net_SSH2::_get_binary_packet()
|
||||
* @return Boolean
|
||||
* @access private
|
||||
*/
|
||||
function _send_binary_packet($data)
|
||||
{
|
||||
if (feof($this->fsock)) {
|
||||
user_error('Connection closed prematurely', E_USER_NOTICE);
|
||||
return false;
|
||||
}
|
||||
|
||||
//if ($this->compress) {
|
||||
// // the -4 removes the checksum:
|
||||
// // http://php.net/function.gzcompress#57710
|
||||
// $data = substr(gzcompress($data), 0, -4);
|
||||
//}
|
||||
|
||||
// 4 (packet length) + 1 (padding length) + 4 (minimal padding amount) == 9
|
||||
$packet_length = strlen($data) + 9;
|
||||
// round up to the nearest $this->encrypt_block_size
|
||||
$packet_length+= (($this->encrypt_block_size - 1) * $packet_length) % $this->encrypt_block_size;
|
||||
// subtracting strlen($data) is obvious - subtracting 5 is necessary because of packet_length and padding_length
|
||||
$padding_length = $packet_length - strlen($data) - 5;
|
||||
|
||||
$padding = '';
|
||||
for ($i = 0; $i < $padding_length; $i++) {
|
||||
$padding.= chr(crypt_random(0, 255));
|
||||
}
|
||||
|
||||
// we subtract 4 from packet_length because the packet_length field isn't supposed to include itself
|
||||
$packet = pack('NCa*', $packet_length - 4, $padding_length, $data . $padding);
|
||||
|
||||
$hmac = $this->hmac_create !== false ? $this->hmac_create->hash(pack('Na*', $this->send_seq_no, $packet)) : '';
|
||||
$this->send_seq_no++;
|
||||
|
||||
if ($this->encrypt !== false) {
|
||||
$packet = $this->encrypt->encrypt($packet);
|
||||
}
|
||||
|
||||
$packet.= $hmac;
|
||||
|
||||
$start = strtok(microtime(), ' ') + strtok(''); // http://php.net/microtime#61838
|
||||
$result = strlen($packet) == fputs($this->fsock, $packet);
|
||||
$stop = strtok(microtime(), ' ') + strtok('');
|
||||
|
||||
if (defined('NET_SSH2_LOGGING')) {
|
||||
$temp = isset($this->message_numbers[ord($data[0])]) ? $this->message_numbers[ord($data[0])] : 'UNKNOWN';
|
||||
$this->message_number_log[] = '-> ' . $temp .
|
||||
' (' . round($stop - $start, 4) . 's)';
|
||||
if (NET_SSH2_LOGGING == NET_SSH2_LOG_COMPLEX) {
|
||||
$this->message_log[] = substr($data, 1);
|
||||
}
|
||||
}
|
||||
|
||||
return $result;
|
||||
}
|
||||
|
||||
/**
|
||||
* Sends channel data
|
||||
*
|
||||
* Spans multiple SSH_MSG_CHANNEL_DATAs if appropriate
|
||||
*
|
||||
* @param Integer $client_channel
|
||||
* @param String $data
|
||||
* @return Boolean
|
||||
* @access private
|
||||
*/
|
||||
function _send_channel_packet($client_channel, $data)
|
||||
{
|
||||
while (strlen($data) > $this->packet_size_client_to_server[$client_channel]) {
|
||||
// resize the window, if appropriate
|
||||
$this->window_size_client_to_server[$client_channel]-= $this->packet_size_client_to_server[$client_channel];
|
||||
if ($this->window_size_client_to_server[$client_channel] < 0) {
|
||||
$packet = pack('CNN', NET_SSH2_MSG_CHANNEL_WINDOW_ADJUST, $this->server_channels[$client_channel], $this->window_size);
|
||||
if (!$this->_send_binary_packet($packet)) {
|
||||
return false;
|
||||
}
|
||||
$this->window_size_client_to_server[$client_channel]+= $this->window_size;
|
||||
}
|
||||
|
||||
$packet = pack('CN2a*',
|
||||
NET_SSH2_MSG_CHANNEL_DATA,
|
||||
$this->server_channels[$client_channel],
|
||||
$this->packet_size_client_to_server[$client_channel],
|
||||
$this->_string_shift($data, $this->packet_size_client_to_server[$client_channel])
|
||||
);
|
||||
|
||||
if (!$this->_send_binary_packet($packet)) {
|
||||
return false;
|
||||
}
|
||||
}
|
||||
|
||||
// resize the window, if appropriate
|
||||
$this->window_size_client_to_server[$client_channel]-= strlen($data);
|
||||
if ($this->window_size_client_to_server[$client_channel] < 0) {
|
||||
$packet = pack('CNN', NET_SSH2_MSG_CHANNEL_WINDOW_ADJUST, $this->server_channels[$client_channel], $this->window_size);
|
||||
if (!$this->_send_binary_packet($packet)) {
|
||||
return false;
|
||||
}
|
||||
$this->window_size_client_to_server[$client_channel]+= $this->window_size;
|
||||
}
|
||||
|
||||
return $this->_send_binary_packet(pack('CN2a*',
|
||||
NET_SSH2_MSG_CHANNEL_DATA,
|
||||
$this->server_channels[$client_channel],
|
||||
strlen($data),
|
||||
$data));
|
||||
}
|
||||
|
||||
/**
|
||||
* Disconnect
|
||||
*
|
||||
* @param Integer $reason
|
||||
* @return Boolean
|
||||
* @access private
|
||||
*/
|
||||
function _disconnect($reason)
|
||||
{
|
||||
if ($this->bitmap) {
|
||||
$data = pack('CNNa*Na*', NET_SSH2_MSG_DISCONNECT, $reason, 0, '', 0, '');
|
||||
$this->_send_binary_packet($data);
|
||||
$this->bitmap = 0;
|
||||
fclose($this->fsock);
|
||||
return false;
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* String Shift
|
||||
*
|
||||
* Inspired by array_shift
|
||||
*
|
||||
* @param String $string
|
||||
* @param optional Integer $index
|
||||
* @return String
|
||||
* @access private
|
||||
*/
|
||||
function _string_shift(&$string, $index = 1)
|
||||
{
|
||||
$substr = substr($string, 0, $index);
|
||||
$string = substr($string, $index);
|
||||
return $substr;
|
||||
}
|
||||
|
||||
/**
|
||||
* Define Array
|
||||
*
|
||||
* Takes any number of arrays whose indices are integers and whose values are strings and defines a bunch of
|
||||
* named constants from it, using the value as the name of the constant and the index as the value of the constant.
|
||||
* If any of the constants that would be defined already exists, none of the constants will be defined.
|
||||
*
|
||||
* @param Array $array
|
||||
* @access private
|
||||
*/
|
||||
function _define_array()
|
||||
{
|
||||
$args = func_get_args();
|
||||
foreach ($args as $arg) {
|
||||
foreach ($arg as $key=>$value) {
|
||||
if (!defined($value)) {
|
||||
define($value, $key);
|
||||
} else {
|
||||
break 2;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns a log of the packets that have been sent and received.
|
||||
*
|
||||
* Returns a string if NET_SSH2_LOGGING == NET_SSH2_LOG_COMPLEX, an array if NET_SSH2_LOGGING == NET_SSH2_LOG_SIMPLE and false if !defined('NET_SSH2_LOGGING')
|
||||
*
|
||||
* @access public
|
||||
* @return String or Array
|
||||
*/
|
||||
function getLog()
|
||||
{
|
||||
if (!defined('NET_SSH2_LOGGING')) {
|
||||
return false;
|
||||
}
|
||||
|
||||
switch (NET_SSH2_LOGGING) {
|
||||
case NET_SSH2_LOG_SIMPLE:
|
||||
return $this->message_number_log;
|
||||
break;
|
||||
case NET_SSH2_LOG_COMPLEX:
|
||||
return $this->_format_log($this->message_log, $this->message_number_log);
|
||||
break;
|
||||
default:
|
||||
return false;
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Formats a log for printing
|
||||
*
|
||||
* @param Array $message_log
|
||||
* @param Array $message_number_log
|
||||
* @access private
|
||||
* @return String
|
||||
*/
|
||||
function _format_log($message_log, $message_number_log)
|
||||
{
|
||||
static $boundary = ':', $long_width = 65, $short_width = 16;
|
||||
|
||||
$output = '';
|
||||
for ($i = 0; $i < count($message_log); $i++) {
|
||||
$output.= $message_number_log[$i] . "\r\n";
|
||||
$current_log = $message_log[$i];
|
||||
$j = 0;
|
||||
do {
|
||||
if (!empty($current_log)) {
|
||||
$output.= str_pad(dechex($j), 7, '0', STR_PAD_LEFT) . '0 ';
|
||||
}
|
||||
$fragment = $this->_string_shift($current_log, $short_width);
|
||||
$hex = substr(
|
||||
preg_replace(
|
||||
'#(.)#es',
|
||||
'"' . $boundary . '" . str_pad(dechex(ord(substr("\\1", -1))), 2, "0", STR_PAD_LEFT)',
|
||||
$fragment),
|
||||
strlen($boundary)
|
||||
);
|
||||
// replace non ASCII printable characters with dots
|
||||
// http://en.wikipedia.org/wiki/ASCII#ASCII_printable_characters
|
||||
// also replace < with a . since < messes up the output on web browsers
|
||||
$raw = preg_replace('#[^\x20-\x7E]|<#', '.', $fragment);
|
||||
$output.= str_pad($hex, $long_width - $short_width, ' ') . $raw . "\r\n";
|
||||
$j++;
|
||||
} while (!empty($current_log));
|
||||
$output.= "\r\n";
|
||||
}
|
||||
|
||||
return $output;
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns all errors
|
||||
*
|
||||
* @return String
|
||||
* @access public
|
||||
*/
|
||||
function getErrors()
|
||||
{
|
||||
return $this->errors;
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the last error
|
||||
*
|
||||
* @return String
|
||||
* @access public
|
||||
*/
|
||||
function getLastError()
|
||||
{
|
||||
return $this->errors[count($this->errors) - 1];
|
||||
}
|
||||
|
||||
/**
|
||||
* Return the server identification.
|
||||
*
|
||||
* @return String
|
||||
* @access public
|
||||
*/
|
||||
function getServerIdentification()
|
||||
{
|
||||
return $this->server_identifier;
|
||||
}
|
||||
|
||||
/**
|
||||
* Return a list of the key exchange algorithms the server supports.
|
||||
*
|
||||
* @return Array
|
||||
* @access public
|
||||
*/
|
||||
function getKexAlgorithms()
|
||||
{
|
||||
return $this->kex_algorithms;
|
||||
}
|
||||
|
||||
/**
|
||||
* Return a list of the host key (public key) algorithms the server supports.
|
||||
*
|
||||
* @return Array
|
||||
* @access public
|
||||
*/
|
||||
function getServerHostKeyAlgorithms()
|
||||
{
|
||||
return $this->server_host_key_algorithms;
|
||||
}
|
||||
|
||||
/**
|
||||
* Return a list of the (symmetric key) encryption algorithms the server supports, when receiving stuff from the client.
|
||||
*
|
||||
* @return Array
|
||||
* @access public
|
||||
*/
|
||||
function getEncryptionAlgorithmsClient2Server()
|
||||
{
|
||||
return $this->encryption_algorithms_client_to_server;
|
||||
}
|
||||
|
||||
/**
|
||||
* Return a list of the (symmetric key) encryption algorithms the server supports, when sending stuff to the client.
|
||||
*
|
||||
* @return Array
|
||||
* @access public
|
||||
*/
|
||||
function getEncryptionAlgorithmsServer2Client()
|
||||
{
|
||||
return $this->encryption_algorithms_server_to_client;
|
||||
}
|
||||
|
||||
/**
|
||||
* Return a list of the MAC algorithms the server supports, when receiving stuff from the client.
|
||||
*
|
||||
* @return Array
|
||||
* @access public
|
||||
*/
|
||||
function getMACAlgorithmsClient2Server()
|
||||
{
|
||||
return $this->mac_algorithms_client_to_server;
|
||||
}
|
||||
|
||||
/**
|
||||
* Return a list of the MAC algorithms the server supports, when sending stuff to the client.
|
||||
*
|
||||
* @return Array
|
||||
* @access public
|
||||
*/
|
||||
function getMACAlgorithmsServer2Client()
|
||||
{
|
||||
return $this->mac_algorithms_server_to_client;
|
||||
}
|
||||
|
||||
/**
|
||||
* Return a list of the compression algorithms the server supports, when receiving stuff from the client.
|
||||
*
|
||||
* @return Array
|
||||
* @access public
|
||||
*/
|
||||
function getCompressionAlgorithmsClient2Server()
|
||||
{
|
||||
return $this->compression_algorithms_client_to_server;
|
||||
}
|
||||
|
||||
/**
|
||||
* Return a list of the compression algorithms the server supports, when sending stuff to the client.
|
||||
*
|
||||
* @return Array
|
||||
* @access public
|
||||
*/
|
||||
function getCompressionAlgorithmsServer2Client()
|
||||
{
|
||||
return $this->compression_algorithms_server_to_client;
|
||||
}
|
||||
|
||||
/**
|
||||
* Return a list of the languages the server supports, when sending stuff to the client.
|
||||
*
|
||||
* @return Array
|
||||
* @access public
|
||||
*/
|
||||
function getLanguagesServer2Client()
|
||||
{
|
||||
return $this->languages_server_to_client;
|
||||
}
|
||||
|
||||
/**
|
||||
* Return a list of the languages the server supports, when receiving stuff from the client.
|
||||
*
|
||||
* @return Array
|
||||
* @access public
|
||||
*/
|
||||
function getLanguagesClient2Server()
|
||||
{
|
||||
return $this->languages_client_to_server;
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the server public host key.
|
||||
*
|
||||
* Caching this the first time you connect to a server and checking the result on subsequent connections
|
||||
* is recommended. Returns false if the server signature is not signed correctly with the public host key.
|
||||
*
|
||||
* @return Mixed
|
||||
* @access public
|
||||
*/
|
||||
function getServerPublicHostKey()
|
||||
{
|
||||
$signature = $this->signature;
|
||||
$server_public_host_key = $this->server_public_host_key;
|
||||
|
||||
extract(unpack('Nlength', $this->_string_shift($server_public_host_key, 4)));
|
||||
$this->_string_shift($server_public_host_key, $length);
|
||||
|
||||
switch ($this->signature_format) {
|
||||
case 'ssh-dss':
|
||||
$temp = unpack('Nlength', $this->_string_shift($server_public_host_key, 4));
|
||||
$p = new Math_BigInteger($this->_string_shift($server_public_host_key, $temp['length']), -256);
|
||||
|
||||
$temp = unpack('Nlength', $this->_string_shift($server_public_host_key, 4));
|
||||
$q = new Math_BigInteger($this->_string_shift($server_public_host_key, $temp['length']), -256);
|
||||
|
||||
$temp = unpack('Nlength', $this->_string_shift($server_public_host_key, 4));
|
||||
$g = new Math_BigInteger($this->_string_shift($server_public_host_key, $temp['length']), -256);
|
||||
|
||||
$temp = unpack('Nlength', $this->_string_shift($server_public_host_key, 4));
|
||||
$y = new Math_BigInteger($this->_string_shift($server_public_host_key, $temp['length']), -256);
|
||||
|
||||
/* The value for 'dss_signature_blob' is encoded as a string containing
|
||||
r, followed by s (which are 160-bit integers, without lengths or
|
||||
padding, unsigned, and in network byte order). */
|
||||
$temp = unpack('Nlength', $this->_string_shift($signature, 4));
|
||||
if ($temp['length'] != 40) {
|
||||
user_error('Invalid signature', E_USER_NOTICE);
|
||||
return $this->_disconnect(NET_SSH2_DISCONNECT_KEY_EXCHANGE_FAILED);
|
||||
}
|
||||
|
||||
$r = new Math_BigInteger($this->_string_shift($signature, 20), 256);
|
||||
$s = new Math_BigInteger($this->_string_shift($signature, 20), 256);
|
||||
|
||||
if ($r->compare($q) >= 0 || $s->compare($q) >= 0) {
|
||||
user_error('Invalid signature', E_USER_NOTICE);
|
||||
return $this->_disconnect(NET_SSH2_DISCONNECT_KEY_EXCHANGE_FAILED);
|
||||
}
|
||||
|
||||
$w = $s->modInverse($q);
|
||||
|
||||
$u1 = $w->multiply(new Math_BigInteger(sha1($this->session_id), 16));
|
||||
list(, $u1) = $u1->divide($q);
|
||||
|
||||
$u2 = $w->multiply($r);
|
||||
list(, $u2) = $u2->divide($q);
|
||||
|
||||
$g = $g->modPow($u1, $p);
|
||||
$y = $y->modPow($u2, $p);
|
||||
|
||||
$v = $g->multiply($y);
|
||||
list(, $v) = $v->divide($p);
|
||||
list(, $v) = $v->divide($q);
|
||||
|
||||
if (!$v->equals($r)) {
|
||||
user_error('Bad server signature', E_USER_NOTICE);
|
||||
return $this->_disconnect(NET_SSH2_DISCONNECT_HOST_KEY_NOT_VERIFIABLE);
|
||||
}
|
||||
|
||||
break;
|
||||
case 'ssh-rsa':
|
||||
$temp = unpack('Nlength', $this->_string_shift($server_public_host_key, 4));
|
||||
$e = new Math_BigInteger($this->_string_shift($server_public_host_key, $temp['length']), -256);
|
||||
|
||||
$temp = unpack('Nlength', $this->_string_shift($server_public_host_key, 4));
|
||||
$n = new Math_BigInteger($this->_string_shift($server_public_host_key, $temp['length']), -256);
|
||||
$nLength = $temp['length'];
|
||||
|
||||
/*
|
||||
$temp = unpack('Nlength', $this->_string_shift($signature, 4));
|
||||
$signature = $this->_string_shift($signature, $temp['length']);
|
||||
|
||||
if (!class_exists('Crypt_RSA')) {
|
||||
require_once('Crypt/RSA.php');
|
||||
}
|
||||
|
||||
$rsa = new Crypt_RSA();
|
||||
$rsa->setSignatureMode(CRYPT_RSA_SIGNATURE_PKCS1);
|
||||
$rsa->loadKey(array('e' => $e, 'n' => $n), CRYPT_RSA_PUBLIC_FORMAT_RAW);
|
||||
if (!$rsa->verify($this->session_id, $signature)) {
|
||||
user_error('Bad server signature', E_USER_NOTICE);
|
||||
return $this->_disconnect(NET_SSH2_DISCONNECT_HOST_KEY_NOT_VERIFIABLE);
|
||||
}
|
||||
*/
|
||||
|
||||
$temp = unpack('Nlength', $this->_string_shift($signature, 4));
|
||||
$s = new Math_BigInteger($this->_string_shift($signature, $temp['length']), 256);
|
||||
|
||||
// validate an RSA signature per "8.2 RSASSA-PKCS1-v1_5", "5.2.2 RSAVP1", and "9.1 EMSA-PSS" in the
|
||||
// following URL:
|
||||
// ftp://ftp.rsasecurity.com/pub/pkcs/pkcs-1/pkcs-1v2-1.pdf
|
||||
|
||||
// also, see SSHRSA.c (rsa2_verifysig) in PuTTy's source.
|
||||
|
||||
if ($s->compare(new Math_BigInteger()) < 0 || $s->compare($n->subtract(new Math_BigInteger(1))) > 0) {
|
||||
user_error('Invalid signature', E_USER_NOTICE);
|
||||
return $this->_disconnect(NET_SSH2_DISCONNECT_KEY_EXCHANGE_FAILED);
|
||||
}
|
||||
|
||||
$s = $s->modPow($e, $n);
|
||||
$s = $s->toBytes();
|
||||
|
||||
$h = pack('N4H*', 0x00302130, 0x0906052B, 0x0E03021A, 0x05000414, sha1($this->session_id));
|
||||
$h = chr(0x01) . str_repeat(chr(0xFF), $nLength - 3 - strlen($h)) . $h;
|
||||
|
||||
if ($s != $h) {
|
||||
user_error('Bad server signature', E_USER_NOTICE);
|
||||
return $this->_disconnect(NET_SSH2_DISCONNECT_HOST_KEY_NOT_VERIFIABLE);
|
||||
}
|
||||
}
|
||||
|
||||
return $this->server_public_host_key;
|
||||
}
|
||||
}
|
||||
Loading…
Add table
Add a link
Reference in a new issue