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<?php
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/**
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* Pure-PHP implementation of SSHv2.
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*
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* PHP version 5
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*
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* Here are some examples of how to use this library:
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* <code>
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* <?php
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* include 'vendor/autoload.php';
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*
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* $ssh = new \phpseclib\Net\SSH2('www.domain.tld');
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* if (!$ssh->login('username', 'password')) {
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* exit('Login Failed');
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* }
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*
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* echo $ssh->exec('pwd');
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* echo $ssh->exec('ls -la');
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* ?>
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* </code>
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*
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* <code>
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* <?php
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* include 'vendor/autoload.php';
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*
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* $key = new \phpseclib\Crypt\RSA();
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* //$key->setPassword('whatever');
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* $key->loadKey(file_get_contents('privatekey'));
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*
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* $ssh = new \phpseclib\Net\SSH2('www.domain.tld');
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* if (!$ssh->login('username', $key)) {
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* exit('Login Failed');
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* }
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*
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* echo $ssh->read('username@username:~$');
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* $ssh->write("ls -la\n");
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* echo $ssh->read('username@username:~$');
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* ?>
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* </code>
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*
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* @category Net
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* @package SSH2
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* @author Jim Wigginton <terrafrost@php.net>
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* @copyright 2007 Jim Wigginton
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* @license http://www.opensource.org/licenses/mit-license.html MIT License
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* @link http://phpseclib.sourceforge.net
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*/
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namespace phpseclib\Net;
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use phpseclib\Crypt\Base;
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use phpseclib\Crypt\Blowfish;
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use phpseclib\Crypt\Hash;
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use phpseclib\Crypt\Random;
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use phpseclib\Crypt\RC4;
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use phpseclib\Crypt\Rijndael;
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use phpseclib\Crypt\RSA;
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use phpseclib\Crypt\TripleDES;
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use phpseclib\Crypt\Twofish;
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use phpseclib\Math\BigInteger; // Used to do Diffie-Hellman key exchange and DSA/RSA signature verification.
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use phpseclib\System\SSH\Agent;
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/**
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* Pure-PHP implementation of SSHv2.
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*
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* @package SSH2
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* @author Jim Wigginton <terrafrost@php.net>
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* @access public
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*/
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class SSH2
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{
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/**#@+
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* Execution Bitmap Masks
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*
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* @see \phpseclib\Net\SSH2::bitmap
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* @access private
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*/
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const MASK_CONSTRUCTOR = 0x00000001;
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const MASK_CONNECTED = 0x00000002;
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const MASK_LOGIN_REQ = 0x00000004;
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const MASK_LOGIN = 0x00000008;
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const MASK_SHELL = 0x00000010;
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const MASK_WINDOW_ADJUST = 0x00000020;
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/**#@-*/
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/**#@+
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* Channel constants
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*
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* RFC4254 refers not to client and server channels but rather to sender and recipient channels. we don't refer
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* to them in that way because RFC4254 toggles the meaning. the client sends a SSH_MSG_CHANNEL_OPEN message with
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* a sender channel and the server sends a SSH_MSG_CHANNEL_OPEN_CONFIRMATION in response, with a sender and a
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* recepient channel. at first glance, you might conclude that SSH_MSG_CHANNEL_OPEN_CONFIRMATION's sender channel
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* would be the same thing as SSH_MSG_CHANNEL_OPEN's sender channel, but it's not, per this snipet:
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* The 'recipient channel' is the channel number given in the original
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* open request, and 'sender channel' is the channel number allocated by
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* the other side.
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*
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* @see \phpseclib\Net\SSH2::_send_channel_packet()
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* @see \phpseclib\Net\SSH2::_get_channel_packet()
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* @access private
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*/
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const CHANNEL_EXEC = 0; // PuTTy uses 0x100
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const CHANNEL_SHELL = 1;
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const CHANNEL_SUBSYSTEM = 2;
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const CHANNEL_AGENT_FORWARD = 3;
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/**#@-*/
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/**#@+
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* @access public
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* @see \phpseclib\Net\SSH2::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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const LOG_SIMPLE = 1;
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/**
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* Returns the message content
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*/
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const LOG_COMPLEX = 2;
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/**
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* Outputs the content real-time
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*/
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const LOG_REALTIME = 3;
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/**
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* Dumps the content real-time to a file
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*/
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const LOG_REALTIME_FILE = 4;
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/**#@-*/
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/**#@+
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* @access public
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* @see \phpseclib\Net\SSH2::read()
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*/
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/**
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* Returns when a string matching $expect exactly is found
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*/
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const READ_SIMPLE = 1;
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/**
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* Returns when a string matching the regular expression $expect is found
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*/
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const READ_REGEX = 2;
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/**
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* Make sure that the log never gets larger than this
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*/
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const LOG_MAX_SIZE = 1048576; // 1024 * 1024
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/**#@-*/
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/**
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* The SSH identifier
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*
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* @var string
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* @access private
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*/
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var $identifier;
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/**
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* The Socket Object
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*
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* @var object
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* @access private
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*/
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var $fsock;
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/**
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* Execution Bitmap
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*
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* The bits that are set represent functions that have been called already. This is used to determine
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* if a requisite function has been successfully executed. If not, an error should be thrown.
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*
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* @var int
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* @access private
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*/
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var $bitmap = 0;
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/**
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* Error information
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*
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* @see self::getErrors()
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* @see self::getLastError()
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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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* Server Identifier
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*
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* @see self::getServerIdentification()
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* @var array|false
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* @access private
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*/
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var $server_identifier = false;
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/**
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* Key Exchange Algorithms
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*
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* @see self::getKexAlgorithims()
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* @var array|false
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* @access private
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*/
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var $kex_algorithms = false;
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/**
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* Minimum Diffie-Hellman Group Bit Size in RFC 4419 Key Exchange Methods
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*
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* @see self::_key_exchange()
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* @var int
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* @access private
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*/
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var $kex_dh_group_size_min = 1536;
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/**
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* Preferred Diffie-Hellman Group Bit Size in RFC 4419 Key Exchange Methods
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*
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* @see self::_key_exchange()
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* @var int
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* @access private
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*/
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var $kex_dh_group_size_preferred = 2048;
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/**
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* Maximum Diffie-Hellman Group Bit Size in RFC 4419 Key Exchange Methods
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*
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* @see self::_key_exchange()
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* @var int
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* @access private
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*/
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var $kex_dh_group_size_max = 4096;
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/**
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* Server Host Key Algorithms
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*
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* @see self::getServerHostKeyAlgorithms()
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* @var array|false
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* @access private
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*/
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var $server_host_key_algorithms = false;
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/**
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* Encryption Algorithms: Client to Server
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*
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* @see self::getEncryptionAlgorithmsClient2Server()
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* @var array|false
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* @access private
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*/
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var $encryption_algorithms_client_to_server = false;
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/**
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* Encryption Algorithms: Server to Client
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*
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* @see self::getEncryptionAlgorithmsServer2Client()
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* @var array|false
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* @access private
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*/
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var $encryption_algorithms_server_to_client = false;
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/**
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* MAC Algorithms: Client to Server
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*
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* @see self::getMACAlgorithmsClient2Server()
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* @var array|false
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* @access private
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*/
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var $mac_algorithms_client_to_server = false;
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/**
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* MAC Algorithms: Server to Client
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*
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* @see self::getMACAlgorithmsServer2Client()
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* @var array|false
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* @access private
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*/
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var $mac_algorithms_server_to_client = false;
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/**
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* Compression Algorithms: Client to Server
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*
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* @see self::getCompressionAlgorithmsClient2Server()
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* @var array|false
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* @access private
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*/
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var $compression_algorithms_client_to_server = false;
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/**
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* Compression Algorithms: Server to Client
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*
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* @see self::getCompressionAlgorithmsServer2Client()
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* @var array|false
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* @access private
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*/
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var $compression_algorithms_server_to_client = false;
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293 |
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/**
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* Languages: Server to Client
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*
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* @see self::getLanguagesServer2Client()
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* @var array|false
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* @access private
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*/
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var $languages_server_to_client = false;
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/**
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* Languages: Client to Server
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*
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* @see self::getLanguagesClient2Server()
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* @var array|false
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* @access private
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*/
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var $languages_client_to_server = false;
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311 |
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312 |
/**
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313 |
* Block Size for Server to Client Encryption
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314 |
*
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315 |
* "Note that the length of the concatenation of 'packet_length',
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316 |
* 'padding_length', 'payload', and 'random padding' MUST be a multiple
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317 |
* of the cipher block size or 8, whichever is larger. This constraint
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318 |
* MUST be enforced, even when using stream ciphers."
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319 |
*
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320 |
* -- http://tools.ietf.org/html/rfc4253#section-6
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*
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* @see self::__construct()
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* @see self::_send_binary_packet()
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* @var int
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* @access private
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*/
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var $encrypt_block_size = 8;
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328 |
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329 |
/**
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330 |
* Block Size for Client to Server Encryption
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331 |
*
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332 |
* @see self::__construct()
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333 |
* @see self::_get_binary_packet()
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* @var int
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* @access private
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336 |
*/
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337 |
var $decrypt_block_size = 8;
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338 |
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339 |
/**
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340 |
* Server to Client Encryption Object
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341 |
*
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342 |
* @see self::_get_binary_packet()
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343 |
* @var object
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* @access private
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*/
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346 |
var $decrypt = false;
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347 |
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348 |
/**
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349 |
* Client to Server Encryption Object
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350 |
*
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351 |
* @see self::_send_binary_packet()
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* @var object
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* @access private
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*/
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355 |
var $encrypt = false;
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356 |
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357 |
/**
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358 |
* Client to Server HMAC Object
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359 |
*
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360 |
* @see self::_send_binary_packet()
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* @var object
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362 |
* @access private
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363 |
*/
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364 |
var $hmac_create = false;
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365 |
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366 |
/**
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367 |
* Server to Client HMAC Object
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368 |
*
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369 |
* @see self::_get_binary_packet()
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370 |
* @var object
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371 |
* @access private
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372 |
*/
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|
373 |
var $hmac_check = false;
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374 |
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375 |
/**
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376 |
* Size of server to client HMAC
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377 |
*
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378 |
* 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.
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|
379 |
* 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
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|
380 |
* append it.
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381 |
*
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382 |
* @see self::_get_binary_packet()
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|
383 |
* @var int
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384 |
* @access private
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|
385 |
*/
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|
386 |
var $hmac_size = false;
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|
387 |
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|
388 |
/**
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|
389 |
* Server Public Host Key
|
|
|
390 |
*
|
|
|
391 |
* @see self::getServerPublicHostKey()
|
|
|
392 |
* @var string
|
|
|
393 |
* @access private
|
|
|
394 |
*/
|
|
|
395 |
var $server_public_host_key;
|
|
|
396 |
|
|
|
397 |
/**
|
|
|
398 |
* Session identifier
|
|
|
399 |
*
|
|
|
400 |
* "The exchange hash H from the first key exchange is additionally
|
|
|
401 |
* used as the session identifier, which is a unique identifier for
|
|
|
402 |
* this connection."
|
|
|
403 |
*
|
|
|
404 |
* -- http://tools.ietf.org/html/rfc4253#section-7.2
|
|
|
405 |
*
|
|
|
406 |
* @see self::_key_exchange()
|
|
|
407 |
* @var string
|
|
|
408 |
* @access private
|
|
|
409 |
*/
|
|
|
410 |
var $session_id = false;
|
|
|
411 |
|
|
|
412 |
/**
|
|
|
413 |
* Exchange hash
|
|
|
414 |
*
|
|
|
415 |
* The current exchange hash
|
|
|
416 |
*
|
|
|
417 |
* @see self::_key_exchange()
|
|
|
418 |
* @var string
|
|
|
419 |
* @access private
|
|
|
420 |
*/
|
|
|
421 |
var $exchange_hash = false;
|
|
|
422 |
|
|
|
423 |
/**
|
|
|
424 |
* Message Numbers
|
|
|
425 |
*
|
|
|
426 |
* @see self::__construct()
|
|
|
427 |
* @var array
|
|
|
428 |
* @access private
|
|
|
429 |
*/
|
|
|
430 |
var $message_numbers = array();
|
|
|
431 |
|
|
|
432 |
/**
|
|
|
433 |
* Disconnection Message 'reason codes' defined in RFC4253
|
|
|
434 |
*
|
|
|
435 |
* @see self::__construct()
|
|
|
436 |
* @var array
|
|
|
437 |
* @access private
|
|
|
438 |
*/
|
|
|
439 |
var $disconnect_reasons = array();
|
|
|
440 |
|
|
|
441 |
/**
|
|
|
442 |
* SSH_MSG_CHANNEL_OPEN_FAILURE 'reason codes', defined in RFC4254
|
|
|
443 |
*
|
|
|
444 |
* @see self::__construct()
|
|
|
445 |
* @var array
|
|
|
446 |
* @access private
|
|
|
447 |
*/
|
|
|
448 |
var $channel_open_failure_reasons = array();
|
|
|
449 |
|
|
|
450 |
/**
|
|
|
451 |
* Terminal Modes
|
|
|
452 |
*
|
|
|
453 |
* @link http://tools.ietf.org/html/rfc4254#section-8
|
|
|
454 |
* @see self::__construct()
|
|
|
455 |
* @var array
|
|
|
456 |
* @access private
|
|
|
457 |
*/
|
|
|
458 |
var $terminal_modes = array();
|
|
|
459 |
|
|
|
460 |
/**
|
|
|
461 |
* SSH_MSG_CHANNEL_EXTENDED_DATA's data_type_codes
|
|
|
462 |
*
|
|
|
463 |
* @link http://tools.ietf.org/html/rfc4254#section-5.2
|
|
|
464 |
* @see self::__construct()
|
|
|
465 |
* @var array
|
|
|
466 |
* @access private
|
|
|
467 |
*/
|
|
|
468 |
var $channel_extended_data_type_codes = array();
|
|
|
469 |
|
|
|
470 |
/**
|
|
|
471 |
* Send Sequence Number
|
|
|
472 |
*
|
|
|
473 |
* See 'Section 6.4. Data Integrity' of rfc4253 for more info.
|
|
|
474 |
*
|
|
|
475 |
* @see self::_send_binary_packet()
|
|
|
476 |
* @var int
|
|
|
477 |
* @access private
|
|
|
478 |
*/
|
|
|
479 |
var $send_seq_no = 0;
|
|
|
480 |
|
|
|
481 |
/**
|
|
|
482 |
* Get Sequence Number
|
|
|
483 |
*
|
|
|
484 |
* See 'Section 6.4. Data Integrity' of rfc4253 for more info.
|
|
|
485 |
*
|
|
|
486 |
* @see self::_get_binary_packet()
|
|
|
487 |
* @var int
|
|
|
488 |
* @access private
|
|
|
489 |
*/
|
|
|
490 |
var $get_seq_no = 0;
|
|
|
491 |
|
|
|
492 |
/**
|
|
|
493 |
* Server Channels
|
|
|
494 |
*
|
|
|
495 |
* Maps client channels to server channels
|
|
|
496 |
*
|
|
|
497 |
* @see self::_get_channel_packet()
|
|
|
498 |
* @see self::exec()
|
|
|
499 |
* @var array
|
|
|
500 |
* @access private
|
|
|
501 |
*/
|
|
|
502 |
var $server_channels = array();
|
|
|
503 |
|
|
|
504 |
/**
|
|
|
505 |
* Channel Buffers
|
|
|
506 |
*
|
|
|
507 |
* If a client requests a packet from one channel but receives two packets from another those packets should
|
|
|
508 |
* be placed in a buffer
|
|
|
509 |
*
|
|
|
510 |
* @see self::_get_channel_packet()
|
|
|
511 |
* @see self::exec()
|
|
|
512 |
* @var array
|
|
|
513 |
* @access private
|
|
|
514 |
*/
|
|
|
515 |
var $channel_buffers = array();
|
|
|
516 |
|
|
|
517 |
/**
|
|
|
518 |
* Channel Status
|
|
|
519 |
*
|
|
|
520 |
* Contains the type of the last sent message
|
|
|
521 |
*
|
|
|
522 |
* @see self::_get_channel_packet()
|
|
|
523 |
* @var array
|
|
|
524 |
* @access private
|
|
|
525 |
*/
|
|
|
526 |
var $channel_status = array();
|
|
|
527 |
|
|
|
528 |
/**
|
|
|
529 |
* Packet Size
|
|
|
530 |
*
|
|
|
531 |
* Maximum packet size indexed by channel
|
|
|
532 |
*
|
|
|
533 |
* @see self::_send_channel_packet()
|
|
|
534 |
* @var array
|
|
|
535 |
* @access private
|
|
|
536 |
*/
|
|
|
537 |
var $packet_size_client_to_server = array();
|
|
|
538 |
|
|
|
539 |
/**
|
|
|
540 |
* Message Number Log
|
|
|
541 |
*
|
|
|
542 |
* @see self::getLog()
|
|
|
543 |
* @var array
|
|
|
544 |
* @access private
|
|
|
545 |
*/
|
|
|
546 |
var $message_number_log = array();
|
|
|
547 |
|
|
|
548 |
/**
|
|
|
549 |
* Message Log
|
|
|
550 |
*
|
|
|
551 |
* @see self::getLog()
|
|
|
552 |
* @var array
|
|
|
553 |
* @access private
|
|
|
554 |
*/
|
|
|
555 |
var $message_log = array();
|
|
|
556 |
|
|
|
557 |
/**
|
|
|
558 |
* The Window Size
|
|
|
559 |
*
|
|
|
560 |
* Bytes the other party can send before it must wait for the window to be adjusted (0x7FFFFFFF = 2GB)
|
|
|
561 |
*
|
|
|
562 |
* @var int
|
|
|
563 |
* @see self::_send_channel_packet()
|
|
|
564 |
* @see self::exec()
|
|
|
565 |
* @access private
|
|
|
566 |
*/
|
|
|
567 |
var $window_size = 0x7FFFFFFF;
|
|
|
568 |
|
|
|
569 |
/**
|
|
|
570 |
* Window size, server to client
|
|
|
571 |
*
|
|
|
572 |
* Window size indexed by channel
|
|
|
573 |
*
|
|
|
574 |
* @see self::_send_channel_packet()
|
|
|
575 |
* @var array
|
|
|
576 |
* @access private
|
|
|
577 |
*/
|
|
|
578 |
var $window_size_server_to_client = array();
|
|
|
579 |
|
|
|
580 |
/**
|
|
|
581 |
* Window size, client to server
|
|
|
582 |
*
|
|
|
583 |
* Window size indexed by channel
|
|
|
584 |
*
|
|
|
585 |
* @see self::_get_channel_packet()
|
|
|
586 |
* @var array
|
|
|
587 |
* @access private
|
|
|
588 |
*/
|
|
|
589 |
var $window_size_client_to_server = array();
|
|
|
590 |
|
|
|
591 |
/**
|
|
|
592 |
* Server signature
|
|
|
593 |
*
|
|
|
594 |
* Verified against $this->session_id
|
|
|
595 |
*
|
|
|
596 |
* @see self::getServerPublicHostKey()
|
|
|
597 |
* @var string
|
|
|
598 |
* @access private
|
|
|
599 |
*/
|
|
|
600 |
var $signature = '';
|
|
|
601 |
|
|
|
602 |
/**
|
|
|
603 |
* Server signature format
|
|
|
604 |
*
|
|
|
605 |
* ssh-rsa or ssh-dss.
|
|
|
606 |
*
|
|
|
607 |
* @see self::getServerPublicHostKey()
|
|
|
608 |
* @var string
|
|
|
609 |
* @access private
|
|
|
610 |
*/
|
|
|
611 |
var $signature_format = '';
|
|
|
612 |
|
|
|
613 |
/**
|
|
|
614 |
* Interactive Buffer
|
|
|
615 |
*
|
|
|
616 |
* @see self::read()
|
|
|
617 |
* @var array
|
|
|
618 |
* @access private
|
|
|
619 |
*/
|
|
|
620 |
var $interactiveBuffer = '';
|
|
|
621 |
|
|
|
622 |
/**
|
|
|
623 |
* Current log size
|
|
|
624 |
*
|
|
|
625 |
* Should never exceed self::LOG_MAX_SIZE
|
|
|
626 |
*
|
|
|
627 |
* @see self::_send_binary_packet()
|
|
|
628 |
* @see self::_get_binary_packet()
|
|
|
629 |
* @var int
|
|
|
630 |
* @access private
|
|
|
631 |
*/
|
|
|
632 |
var $log_size;
|
|
|
633 |
|
|
|
634 |
/**
|
|
|
635 |
* Timeout
|
|
|
636 |
*
|
|
|
637 |
* @see self::setTimeout()
|
|
|
638 |
* @access private
|
|
|
639 |
*/
|
|
|
640 |
var $timeout;
|
|
|
641 |
|
|
|
642 |
/**
|
|
|
643 |
* Current Timeout
|
|
|
644 |
*
|
|
|
645 |
* @see self::_get_channel_packet()
|
|
|
646 |
* @access private
|
|
|
647 |
*/
|
|
|
648 |
var $curTimeout;
|
|
|
649 |
|
|
|
650 |
/**
|
|
|
651 |
* Real-time log file pointer
|
|
|
652 |
*
|
|
|
653 |
* @see self::_append_log()
|
|
|
654 |
* @var resource
|
|
|
655 |
* @access private
|
|
|
656 |
*/
|
|
|
657 |
var $realtime_log_file;
|
|
|
658 |
|
|
|
659 |
/**
|
|
|
660 |
* Real-time log file size
|
|
|
661 |
*
|
|
|
662 |
* @see self::_append_log()
|
|
|
663 |
* @var int
|
|
|
664 |
* @access private
|
|
|
665 |
*/
|
|
|
666 |
var $realtime_log_size;
|
|
|
667 |
|
|
|
668 |
/**
|
|
|
669 |
* Has the signature been validated?
|
|
|
670 |
*
|
|
|
671 |
* @see self::getServerPublicHostKey()
|
|
|
672 |
* @var bool
|
|
|
673 |
* @access private
|
|
|
674 |
*/
|
|
|
675 |
var $signature_validated = false;
|
|
|
676 |
|
|
|
677 |
/**
|
|
|
678 |
* Real-time log file wrap boolean
|
|
|
679 |
*
|
|
|
680 |
* @see self::_append_log()
|
|
|
681 |
* @access private
|
|
|
682 |
*/
|
|
|
683 |
var $realtime_log_wrap;
|
|
|
684 |
|
|
|
685 |
/**
|
|
|
686 |
* Flag to suppress stderr from output
|
|
|
687 |
*
|
|
|
688 |
* @see self::enableQuietMode()
|
|
|
689 |
* @access private
|
|
|
690 |
*/
|
|
|
691 |
var $quiet_mode = false;
|
|
|
692 |
|
|
|
693 |
/**
|
|
|
694 |
* Time of first network activity
|
|
|
695 |
*
|
|
|
696 |
* @var int
|
|
|
697 |
* @access private
|
|
|
698 |
*/
|
|
|
699 |
var $last_packet;
|
|
|
700 |
|
|
|
701 |
/**
|
|
|
702 |
* Exit status returned from ssh if any
|
|
|
703 |
*
|
|
|
704 |
* @var int
|
|
|
705 |
* @access private
|
|
|
706 |
*/
|
|
|
707 |
var $exit_status;
|
|
|
708 |
|
|
|
709 |
/**
|
|
|
710 |
* Flag to request a PTY when using exec()
|
|
|
711 |
*
|
|
|
712 |
* @var bool
|
|
|
713 |
* @see self::enablePTY()
|
|
|
714 |
* @access private
|
|
|
715 |
*/
|
|
|
716 |
var $request_pty = false;
|
|
|
717 |
|
|
|
718 |
/**
|
|
|
719 |
* Flag set while exec() is running when using enablePTY()
|
|
|
720 |
*
|
|
|
721 |
* @var bool
|
|
|
722 |
* @access private
|
|
|
723 |
*/
|
|
|
724 |
var $in_request_pty_exec = false;
|
|
|
725 |
|
|
|
726 |
/**
|
|
|
727 |
* Flag set after startSubsystem() is called
|
|
|
728 |
*
|
|
|
729 |
* @var bool
|
|
|
730 |
* @access private
|
|
|
731 |
*/
|
|
|
732 |
var $in_subsystem;
|
|
|
733 |
|
|
|
734 |
/**
|
|
|
735 |
* Contents of stdError
|
|
|
736 |
*
|
|
|
737 |
* @var string
|
|
|
738 |
* @access private
|
|
|
739 |
*/
|
|
|
740 |
var $stdErrorLog;
|
|
|
741 |
|
|
|
742 |
/**
|
|
|
743 |
* The Last Interactive Response
|
|
|
744 |
*
|
|
|
745 |
* @see self::_keyboard_interactive_process()
|
|
|
746 |
* @var string
|
|
|
747 |
* @access private
|
|
|
748 |
*/
|
|
|
749 |
var $last_interactive_response = '';
|
|
|
750 |
|
|
|
751 |
/**
|
|
|
752 |
* Keyboard Interactive Request / Responses
|
|
|
753 |
*
|
|
|
754 |
* @see self::_keyboard_interactive_process()
|
|
|
755 |
* @var array
|
|
|
756 |
* @access private
|
|
|
757 |
*/
|
|
|
758 |
var $keyboard_requests_responses = array();
|
|
|
759 |
|
|
|
760 |
/**
|
|
|
761 |
* Banner Message
|
|
|
762 |
*
|
|
|
763 |
* Quoting from the RFC, "in some jurisdictions, sending a warning message before
|
|
|
764 |
* authentication may be relevant for getting legal protection."
|
|
|
765 |
*
|
|
|
766 |
* @see self::_filter()
|
|
|
767 |
* @see self::getBannerMessage()
|
|
|
768 |
* @var string
|
|
|
769 |
* @access private
|
|
|
770 |
*/
|
|
|
771 |
var $banner_message = '';
|
|
|
772 |
|
|
|
773 |
/**
|
|
|
774 |
* Did read() timeout or return normally?
|
|
|
775 |
*
|
|
|
776 |
* @see self::isTimeout()
|
|
|
777 |
* @var bool
|
|
|
778 |
* @access private
|
|
|
779 |
*/
|
|
|
780 |
var $is_timeout = false;
|
|
|
781 |
|
|
|
782 |
/**
|
|
|
783 |
* Log Boundary
|
|
|
784 |
*
|
|
|
785 |
* @see self::_format_log()
|
|
|
786 |
* @var string
|
|
|
787 |
* @access private
|
|
|
788 |
*/
|
|
|
789 |
var $log_boundary = ':';
|
|
|
790 |
|
|
|
791 |
/**
|
|
|
792 |
* Log Long Width
|
|
|
793 |
*
|
|
|
794 |
* @see self::_format_log()
|
|
|
795 |
* @var int
|
|
|
796 |
* @access private
|
|
|
797 |
*/
|
|
|
798 |
var $log_long_width = 65;
|
|
|
799 |
|
|
|
800 |
/**
|
|
|
801 |
* Log Short Width
|
|
|
802 |
*
|
|
|
803 |
* @see self::_format_log()
|
|
|
804 |
* @var int
|
|
|
805 |
* @access private
|
|
|
806 |
*/
|
|
|
807 |
var $log_short_width = 16;
|
|
|
808 |
|
|
|
809 |
/**
|
|
|
810 |
* Hostname
|
|
|
811 |
*
|
|
|
812 |
* @see self::__construct()
|
|
|
813 |
* @see self::_connect()
|
|
|
814 |
* @var string
|
|
|
815 |
* @access private
|
|
|
816 |
*/
|
|
|
817 |
var $host;
|
|
|
818 |
|
|
|
819 |
/**
|
|
|
820 |
* Port Number
|
|
|
821 |
*
|
|
|
822 |
* @see self::__construct()
|
|
|
823 |
* @see self::_connect()
|
|
|
824 |
* @var int
|
|
|
825 |
* @access private
|
|
|
826 |
*/
|
|
|
827 |
var $port;
|
|
|
828 |
|
|
|
829 |
/**
|
|
|
830 |
* Number of columns for terminal window size
|
|
|
831 |
*
|
|
|
832 |
* @see self::getWindowColumns()
|
|
|
833 |
* @see self::setWindowColumns()
|
|
|
834 |
* @see self::setWindowSize()
|
|
|
835 |
* @var int
|
|
|
836 |
* @access private
|
|
|
837 |
*/
|
|
|
838 |
var $windowColumns = 80;
|
|
|
839 |
|
|
|
840 |
/**
|
|
|
841 |
* Number of columns for terminal window size
|
|
|
842 |
*
|
|
|
843 |
* @see self::getWindowRows()
|
|
|
844 |
* @see self::setWindowRows()
|
|
|
845 |
* @see self::setWindowSize()
|
|
|
846 |
* @var int
|
|
|
847 |
* @access private
|
|
|
848 |
*/
|
|
|
849 |
var $windowRows = 24;
|
|
|
850 |
|
|
|
851 |
/**
|
|
|
852 |
* Crypto Engine
|
|
|
853 |
*
|
|
|
854 |
* @see self::setCryptoEngine()
|
|
|
855 |
* @see self::_key_exchange()
|
|
|
856 |
* @var int
|
|
|
857 |
* @access private
|
|
|
858 |
*/
|
|
|
859 |
var $crypto_engine = false;
|
|
|
860 |
|
|
|
861 |
/**
|
|
|
862 |
* A System_SSH_Agent for use in the SSH2 Agent Forwarding scenario
|
|
|
863 |
*
|
|
|
864 |
* @var System_SSH_Agent
|
|
|
865 |
* @access private
|
|
|
866 |
*/
|
|
|
867 |
var $agent;
|
|
|
868 |
|
|
|
869 |
/**
|
|
|
870 |
* Default Constructor.
|
|
|
871 |
*
|
|
|
872 |
* $host can either be a string, representing the host, or a stream resource.
|
|
|
873 |
*
|
|
|
874 |
* @param mixed $host
|
|
|
875 |
* @param int $port
|
|
|
876 |
* @param int $timeout
|
|
|
877 |
* @see self::login()
|
|
|
878 |
* @return \phpseclib\Net\SSH2
|
|
|
879 |
* @access public
|
|
|
880 |
*/
|
|
|
881 |
function __construct($host, $port = 22, $timeout = 10)
|
|
|
882 |
{
|
|
|
883 |
$this->message_numbers = array(
|
|
|
884 |
1 => 'NET_SSH2_MSG_DISCONNECT',
|
|
|
885 |
2 => 'NET_SSH2_MSG_IGNORE',
|
|
|
886 |
3 => 'NET_SSH2_MSG_UNIMPLEMENTED',
|
|
|
887 |
4 => 'NET_SSH2_MSG_DEBUG',
|
|
|
888 |
5 => 'NET_SSH2_MSG_SERVICE_REQUEST',
|
|
|
889 |
6 => 'NET_SSH2_MSG_SERVICE_ACCEPT',
|
|
|
890 |
20 => 'NET_SSH2_MSG_KEXINIT',
|
|
|
891 |
21 => 'NET_SSH2_MSG_NEWKEYS',
|
|
|
892 |
30 => 'NET_SSH2_MSG_KEXDH_INIT',
|
|
|
893 |
31 => 'NET_SSH2_MSG_KEXDH_REPLY',
|
|
|
894 |
50 => 'NET_SSH2_MSG_USERAUTH_REQUEST',
|
|
|
895 |
51 => 'NET_SSH2_MSG_USERAUTH_FAILURE',
|
|
|
896 |
52 => 'NET_SSH2_MSG_USERAUTH_SUCCESS',
|
|
|
897 |
53 => 'NET_SSH2_MSG_USERAUTH_BANNER',
|
|
|
898 |
|
|
|
899 |
80 => 'NET_SSH2_MSG_GLOBAL_REQUEST',
|
|
|
900 |
81 => 'NET_SSH2_MSG_REQUEST_SUCCESS',
|
|
|
901 |
82 => 'NET_SSH2_MSG_REQUEST_FAILURE',
|
|
|
902 |
90 => 'NET_SSH2_MSG_CHANNEL_OPEN',
|
|
|
903 |
91 => 'NET_SSH2_MSG_CHANNEL_OPEN_CONFIRMATION',
|
|
|
904 |
92 => 'NET_SSH2_MSG_CHANNEL_OPEN_FAILURE',
|
|
|
905 |
93 => 'NET_SSH2_MSG_CHANNEL_WINDOW_ADJUST',
|
|
|
906 |
94 => 'NET_SSH2_MSG_CHANNEL_DATA',
|
|
|
907 |
95 => 'NET_SSH2_MSG_CHANNEL_EXTENDED_DATA',
|
|
|
908 |
96 => 'NET_SSH2_MSG_CHANNEL_EOF',
|
|
|
909 |
97 => 'NET_SSH2_MSG_CHANNEL_CLOSE',
|
|
|
910 |
98 => 'NET_SSH2_MSG_CHANNEL_REQUEST',
|
|
|
911 |
99 => 'NET_SSH2_MSG_CHANNEL_SUCCESS',
|
|
|
912 |
100 => 'NET_SSH2_MSG_CHANNEL_FAILURE'
|
|
|
913 |
);
|
|
|
914 |
$this->disconnect_reasons = array(
|
|
|
915 |
1 => 'NET_SSH2_DISCONNECT_HOST_NOT_ALLOWED_TO_CONNECT',
|
|
|
916 |
2 => 'NET_SSH2_DISCONNECT_PROTOCOL_ERROR',
|
|
|
917 |
3 => 'NET_SSH2_DISCONNECT_KEY_EXCHANGE_FAILED',
|
|
|
918 |
4 => 'NET_SSH2_DISCONNECT_RESERVED',
|
|
|
919 |
5 => 'NET_SSH2_DISCONNECT_MAC_ERROR',
|
|
|
920 |
6 => 'NET_SSH2_DISCONNECT_COMPRESSION_ERROR',
|
|
|
921 |
7 => 'NET_SSH2_DISCONNECT_SERVICE_NOT_AVAILABLE',
|
|
|
922 |
8 => 'NET_SSH2_DISCONNECT_PROTOCOL_VERSION_NOT_SUPPORTED',
|
|
|
923 |
9 => 'NET_SSH2_DISCONNECT_HOST_KEY_NOT_VERIFIABLE',
|
|
|
924 |
10 => 'NET_SSH2_DISCONNECT_CONNECTION_LOST',
|
|
|
925 |
11 => 'NET_SSH2_DISCONNECT_BY_APPLICATION',
|
|
|
926 |
12 => 'NET_SSH2_DISCONNECT_TOO_MANY_CONNECTIONS',
|
|
|
927 |
13 => 'NET_SSH2_DISCONNECT_AUTH_CANCELLED_BY_USER',
|
|
|
928 |
14 => 'NET_SSH2_DISCONNECT_NO_MORE_AUTH_METHODS_AVAILABLE',
|
|
|
929 |
15 => 'NET_SSH2_DISCONNECT_ILLEGAL_USER_NAME'
|
|
|
930 |
);
|
|
|
931 |
$this->channel_open_failure_reasons = array(
|
|
|
932 |
1 => 'NET_SSH2_OPEN_ADMINISTRATIVELY_PROHIBITED'
|
|
|
933 |
);
|
|
|
934 |
$this->terminal_modes = array(
|
|
|
935 |
|
|
|
936 |
);
|
|
|
937 |
$this->channel_extended_data_type_codes = array(
|
|
|
938 |
1 => 'NET_SSH2_EXTENDED_DATA_STDERR'
|
|
|
939 |
);
|
|
|
940 |
|
|
|
941 |
$this->_define_array(
|
|
|
942 |
$this->message_numbers,
|
|
|
943 |
$this->disconnect_reasons,
|
|
|
944 |
$this->channel_open_failure_reasons,
|
|
|
945 |
$this->terminal_modes,
|
|
|
946 |
$this->channel_extended_data_type_codes,
|
|
|
947 |
array(60 => 'NET_SSH2_MSG_USERAUTH_PASSWD_CHANGEREQ'),
|
|
|
948 |
array(60 => 'NET_SSH2_MSG_USERAUTH_PK_OK'),
|
|
|
949 |
array(60 => 'NET_SSH2_MSG_USERAUTH_INFO_REQUEST',
|
|
|
950 |
61 => 'NET_SSH2_MSG_USERAUTH_INFO_RESPONSE'),
|
|
|
951 |
// RFC 4419 - diffie-hellman-group-exchange-sha{1,256}
|
|
|
952 |
array(30 => 'NET_SSH2_MSG_KEXDH_GEX_REQUEST_OLD',
|
|
|
953 |
31 => 'NET_SSH2_MSG_KEXDH_GEX_GROUP',
|
|
|
954 |
32 => 'NET_SSH2_MSG_KEXDH_GEX_INIT',
|
|
|
955 |
33 => 'NET_SSH2_MSG_KEXDH_GEX_REPLY',
|
|
|
956 |
34 => 'NET_SSH2_MSG_KEXDH_GEX_REQUEST'),
|
|
|
957 |
// RFC 5656 - Elliptic Curves (for curve25519-sha256@libssh.org)
|
|
|
958 |
array(30 => 'NET_SSH2_MSG_KEX_ECDH_INIT',
|
|
|
959 |
31 => 'NET_SSH2_MSG_KEX_ECDH_REPLY')
|
|
|
960 |
);
|
|
|
961 |
|
|
|
962 |
if (is_resource($host)) {
|
|
|
963 |
$this->fsock = $host;
|
|
|
964 |
return;
|
|
|
965 |
}
|
|
|
966 |
|
|
|
967 |
if (is_string($host)) {
|
|
|
968 |
$this->host = $host;
|
|
|
969 |
$this->port = $port;
|
|
|
970 |
$this->timeout = $timeout;
|
|
|
971 |
}
|
|
|
972 |
}
|
|
|
973 |
|
|
|
974 |
/**
|
|
|
975 |
* Set Crypto Engine Mode
|
|
|
976 |
*
|
|
|
977 |
* Possible $engine values:
|
|
|
978 |
* CRYPT_MODE_INTERNAL, CRYPT_MODE_MCRYPT
|
|
|
979 |
*
|
|
|
980 |
* @param int $engine
|
|
|
981 |
* @access private
|
|
|
982 |
*/
|
|
|
983 |
function setCryptoEngine($engine)
|
|
|
984 |
{
|
|
|
985 |
$this->crypto_engine = $engine;
|
|
|
986 |
}
|
|
|
987 |
|
|
|
988 |
/**
|
|
|
989 |
* Connect to an SSHv2 server
|
|
|
990 |
*
|
|
|
991 |
* @return bool
|
|
|
992 |
* @access private
|
|
|
993 |
*/
|
|
|
994 |
function _connect()
|
|
|
995 |
{
|
|
|
996 |
if ($this->bitmap & self::MASK_CONSTRUCTOR) {
|
|
|
997 |
return false;
|
|
|
998 |
}
|
|
|
999 |
|
|
|
1000 |
$this->bitmap |= self::MASK_CONSTRUCTOR;
|
|
|
1001 |
|
|
|
1002 |
$this->curTimeout = $this->timeout;
|
|
|
1003 |
|
|
|
1004 |
$this->last_packet = microtime(true);
|
|
|
1005 |
|
|
|
1006 |
if (!is_resource($this->fsock)) {
|
|
|
1007 |
$start = microtime(true);
|
|
|
1008 |
$this->fsock = @fsockopen($this->host, $this->port, $errno, $errstr, $this->curTimeout);
|
|
|
1009 |
if (!$this->fsock) {
|
|
|
1010 |
$host = $this->host . ':' . $this->port;
|
|
|
1011 |
user_error(rtrim("Cannot connect to $host. Error $errno. $errstr"));
|
|
|
1012 |
return false;
|
|
|
1013 |
}
|
|
|
1014 |
$elapsed = microtime(true) - $start;
|
|
|
1015 |
|
|
|
1016 |
$this->curTimeout-= $elapsed;
|
|
|
1017 |
|
|
|
1018 |
if ($this->curTimeout <= 0) {
|
|
|
1019 |
$this->is_timeout = true;
|
|
|
1020 |
return false;
|
|
|
1021 |
}
|
|
|
1022 |
}
|
|
|
1023 |
|
|
|
1024 |
/* According to the SSH2 specs,
|
|
|
1025 |
|
|
|
1026 |
"The server MAY send other lines of data before sending the version
|
|
|
1027 |
string. Each line SHOULD be terminated by a Carriage Return and Line
|
|
|
1028 |
Feed. Such lines MUST NOT begin with "SSH-", and SHOULD be encoded
|
|
|
1029 |
in ISO-10646 UTF-8 [RFC3629] (language is not specified). Clients
|
|
|
1030 |
MUST be able to process such lines." */
|
|
|
1031 |
$data = '';
|
|
|
1032 |
while (!feof($this->fsock) && !preg_match('#(.*)^(SSH-(\d\.\d+).*)#ms', $data, $matches)) {
|
|
|
1033 |
$line = '';
|
|
|
1034 |
while (true) {
|
|
|
1035 |
if ($this->curTimeout) {
|
|
|
1036 |
if ($this->curTimeout < 0) {
|
|
|
1037 |
$this->is_timeout = true;
|
|
|
1038 |
return false;
|
|
|
1039 |
}
|
|
|
1040 |
$read = array($this->fsock);
|
|
|
1041 |
$write = $except = null;
|
|
|
1042 |
$start = microtime(true);
|
|
|
1043 |
$sec = floor($this->curTimeout);
|
|
|
1044 |
$usec = 1000000 * ($this->curTimeout - $sec);
|
|
|
1045 |
// on windows this returns a "Warning: Invalid CRT parameters detected" error
|
|
|
1046 |
// the !count() is done as a workaround for <https://bugs.php.net/42682>
|
|
|
1047 |
if (!@stream_select($read, $write, $except, $sec, $usec) && !count($read)) {
|
|
|
1048 |
$this->is_timeout = true;
|
|
|
1049 |
return false;
|
|
|
1050 |
}
|
|
|
1051 |
$elapsed = microtime(true) - $start;
|
|
|
1052 |
$this->curTimeout-= $elapsed;
|
|
|
1053 |
}
|
|
|
1054 |
|
|
|
1055 |
$temp = stream_get_line($this->fsock, 255, "\n");
|
|
|
1056 |
if (strlen($temp) == 255) {
|
|
|
1057 |
continue;
|
|
|
1058 |
}
|
|
|
1059 |
|
|
|
1060 |
$line.= "$temp\n";
|
|
|
1061 |
|
|
|
1062 |
// quoting RFC4253, "Implementers who wish to maintain
|
|
|
1063 |
// compatibility with older, undocumented versions of this protocol may
|
|
|
1064 |
// want to process the identification string without expecting the
|
|
|
1065 |
// presence of the carriage return character for reasons described in
|
|
|
1066 |
// Section 5 of this document."
|
|
|
1067 |
|
|
|
1068 |
//if (substr($line, -2) == "\r\n") {
|
|
|
1069 |
// break;
|
|
|
1070 |
//}
|
|
|
1071 |
|
|
|
1072 |
break;
|
|
|
1073 |
}
|
|
|
1074 |
|
|
|
1075 |
$data.= $line;
|
|
|
1076 |
}
|
|
|
1077 |
|
|
|
1078 |
if (feof($this->fsock)) {
|
|
|
1079 |
user_error('Connection closed by server');
|
|
|
1080 |
return false;
|
|
|
1081 |
}
|
|
|
1082 |
|
|
|
1083 |
$extra = $matches[1];
|
|
|
1084 |
|
|
|
1085 |
$this->identifier = $this->_generate_identifier();
|
|
|
1086 |
|
|
|
1087 |
if (defined('NET_SSH2_LOGGING')) {
|
|
|
1088 |
$this->_append_log('<-', $matches[0]);
|
|
|
1089 |
$this->_append_log('->', $this->identifier . "\r\n");
|
|
|
1090 |
}
|
|
|
1091 |
|
|
|
1092 |
$this->server_identifier = trim($temp, "\r\n");
|
|
|
1093 |
if (strlen($extra)) {
|
|
|
1094 |
$this->errors[] = utf8_decode($data);
|
|
|
1095 |
}
|
|
|
1096 |
|
|
|
1097 |
if ($matches[3] != '1.99' && $matches[3] != '2.0') {
|
|
|
1098 |
user_error("Cannot connect to SSH $matches[3] servers");
|
|
|
1099 |
return false;
|
|
|
1100 |
}
|
|
|
1101 |
|
|
|
1102 |
fputs($this->fsock, $this->identifier . "\r\n");
|
|
|
1103 |
|
|
|
1104 |
$response = $this->_get_binary_packet();
|
|
|
1105 |
if ($response === false) {
|
|
|
1106 |
user_error('Connection closed by server');
|
|
|
1107 |
return false;
|
|
|
1108 |
}
|
|
|
1109 |
|
|
|
1110 |
if (ord($response[0]) != NET_SSH2_MSG_KEXINIT) {
|
|
|
1111 |
user_error('Expected SSH_MSG_KEXINIT');
|
|
|
1112 |
return false;
|
|
|
1113 |
}
|
|
|
1114 |
|
|
|
1115 |
if (!$this->_key_exchange($response)) {
|
|
|
1116 |
return false;
|
|
|
1117 |
}
|
|
|
1118 |
|
|
|
1119 |
$this->bitmap|= self::MASK_CONNECTED;
|
|
|
1120 |
|
|
|
1121 |
return true;
|
|
|
1122 |
}
|
|
|
1123 |
|
|
|
1124 |
/**
|
|
|
1125 |
* Generates the SSH identifier
|
|
|
1126 |
*
|
|
|
1127 |
* You should overwrite this method in your own class if you want to use another identifier
|
|
|
1128 |
*
|
|
|
1129 |
* @access protected
|
|
|
1130 |
* @return string
|
|
|
1131 |
*/
|
|
|
1132 |
function _generate_identifier()
|
|
|
1133 |
{
|
|
|
1134 |
$identifier = 'SSH-2.0-phpseclib_2.0';
|
|
|
1135 |
|
|
|
1136 |
$ext = array();
|
|
|
1137 |
if (extension_loaded('libsodium')) {
|
|
|
1138 |
$ext[] = 'libsodium';
|
|
|
1139 |
}
|
|
|
1140 |
|
|
|
1141 |
if (extension_loaded('openssl')) {
|
|
|
1142 |
$ext[] = 'openssl';
|
|
|
1143 |
} elseif (extension_loaded('mcrypt')) {
|
|
|
1144 |
$ext[] = 'mcrypt';
|
|
|
1145 |
}
|
|
|
1146 |
|
|
|
1147 |
if (extension_loaded('gmp')) {
|
|
|
1148 |
$ext[] = 'gmp';
|
|
|
1149 |
} elseif (extension_loaded('bcmath')) {
|
|
|
1150 |
$ext[] = 'bcmath';
|
|
|
1151 |
}
|
|
|
1152 |
|
|
|
1153 |
if (!empty($ext)) {
|
|
|
1154 |
$identifier .= ' (' . implode(', ', $ext) . ')';
|
|
|
1155 |
}
|
|
|
1156 |
|
|
|
1157 |
return $identifier;
|
|
|
1158 |
}
|
|
|
1159 |
|
|
|
1160 |
/**
|
|
|
1161 |
* Key Exchange
|
|
|
1162 |
*
|
|
|
1163 |
* @param string $kexinit_payload_server
|
|
|
1164 |
* @access private
|
|
|
1165 |
*/
|
|
|
1166 |
function _key_exchange($kexinit_payload_server)
|
|
|
1167 |
{
|
|
|
1168 |
$kex_algorithms = array(
|
|
|
1169 |
// Elliptic Curve Diffie-Hellman Key Agreement (ECDH) using
|
|
|
1170 |
// Curve25519. See doc/curve25519-sha256@libssh.org.txt in the
|
|
|
1171 |
// libssh repository for more information.
|
|
|
1172 |
'curve25519-sha256@libssh.org',
|
|
|
1173 |
|
|
|
1174 |
// Diffie-Hellman Key Agreement (DH) using integer modulo prime
|
|
|
1175 |
// groups.
|
|
|
1176 |
'diffie-hellman-group1-sha1', // REQUIRED
|
|
|
1177 |
'diffie-hellman-group14-sha1', // REQUIRED
|
|
|
1178 |
'diffie-hellman-group-exchange-sha1', // RFC 4419
|
|
|
1179 |
'diffie-hellman-group-exchange-sha256', // RFC 4419
|
|
|
1180 |
);
|
|
|
1181 |
if (!function_exists('\\Sodium\\library_version_major')) {
|
|
|
1182 |
$kex_algorithms = array_diff(
|
|
|
1183 |
$kex_algorithms,
|
|
|
1184 |
array('curve25519-sha256@libssh.org')
|
|
|
1185 |
);
|
|
|
1186 |
}
|
|
|
1187 |
|
|
|
1188 |
$server_host_key_algorithms = array(
|
|
|
1189 |
'ssh-rsa', // RECOMMENDED sign Raw RSA Key
|
|
|
1190 |
'ssh-dss' // REQUIRED sign Raw DSS Key
|
|
|
1191 |
);
|
|
|
1192 |
|
|
|
1193 |
$encryption_algorithms = array(
|
|
|
1194 |
// from <http://tools.ietf.org/html/rfc4345#section-4>:
|
|
|
1195 |
'arcfour256',
|
|
|
1196 |
'arcfour128',
|
|
|
1197 |
|
|
|
1198 |
//'arcfour', // OPTIONAL the ARCFOUR stream cipher with a 128-bit key
|
|
|
1199 |
|
|
|
1200 |
// CTR modes from <http://tools.ietf.org/html/rfc4344#section-4>:
|
|
|
1201 |
'aes128-ctr', // RECOMMENDED AES (Rijndael) in SDCTR mode, with 128-bit key
|
|
|
1202 |
'aes192-ctr', // RECOMMENDED AES with 192-bit key
|
|
|
1203 |
'aes256-ctr', // RECOMMENDED AES with 256-bit key
|
|
|
1204 |
|
|
|
1205 |
'twofish128-ctr', // OPTIONAL Twofish in SDCTR mode, with 128-bit key
|
|
|
1206 |
'twofish192-ctr', // OPTIONAL Twofish with 192-bit key
|
|
|
1207 |
'twofish256-ctr', // OPTIONAL Twofish with 256-bit key
|
|
|
1208 |
|
|
|
1209 |
'aes128-cbc', // RECOMMENDED AES with a 128-bit key
|
|
|
1210 |
'aes192-cbc', // OPTIONAL AES with a 192-bit key
|
|
|
1211 |
'aes256-cbc', // OPTIONAL AES in CBC mode, with a 256-bit key
|
|
|
1212 |
|
|
|
1213 |
'twofish128-cbc', // OPTIONAL Twofish with a 128-bit key
|
|
|
1214 |
'twofish192-cbc', // OPTIONAL Twofish with a 192-bit key
|
|
|
1215 |
'twofish256-cbc',
|
|
|
1216 |
'twofish-cbc', // OPTIONAL alias for "twofish256-cbc"
|
|
|
1217 |
// (this is being retained for historical reasons)
|
|
|
1218 |
|
|
|
1219 |
'blowfish-ctr', // OPTIONAL Blowfish in SDCTR mode
|
|
|
1220 |
|
|
|
1221 |
'blowfish-cbc', // OPTIONAL Blowfish in CBC mode
|
|
|
1222 |
|
|
|
1223 |
'3des-ctr', // RECOMMENDED Three-key 3DES in SDCTR mode
|
|
|
1224 |
|
|
|
1225 |
'3des-cbc', // REQUIRED three-key 3DES in CBC mode
|
|
|
1226 |
//'none' // OPTIONAL no encryption; NOT RECOMMENDED
|
|
|
1227 |
);
|
|
|
1228 |
|
|
|
1229 |
if (extension_loaded('openssl') && !extension_loaded('mcrypt')) {
|
|
|
1230 |
// OpenSSL does not support arcfour256 in any capacity and arcfour128 / arcfour support is limited to
|
|
|
1231 |
// instances that do not use continuous buffers
|
|
|
1232 |
$encryption_algorithms = array_diff(
|
|
|
1233 |
$encryption_algorithms,
|
|
|
1234 |
array('arcfour256', 'arcfour128', 'arcfour')
|
|
|
1235 |
);
|
|
|
1236 |
}
|
|
|
1237 |
|
|
|
1238 |
if (class_exists('\phpseclib\Crypt\RC4') === false) {
|
|
|
1239 |
$encryption_algorithms = array_diff(
|
|
|
1240 |
$encryption_algorithms,
|
|
|
1241 |
array('arcfour256', 'arcfour128', 'arcfour')
|
|
|
1242 |
);
|
|
|
1243 |
}
|
|
|
1244 |
if (class_exists('\phpseclib\Crypt\Rijndael') === false) {
|
|
|
1245 |
$encryption_algorithms = array_diff(
|
|
|
1246 |
$encryption_algorithms,
|
|
|
1247 |
array('aes128-ctr', 'aes192-ctr', 'aes256-ctr', 'aes128-cbc', 'aes192-cbc', 'aes256-cbc')
|
|
|
1248 |
);
|
|
|
1249 |
}
|
|
|
1250 |
if (class_exists('\phpseclib\Crypt\Twofish') === false) {
|
|
|
1251 |
$encryption_algorithms = array_diff(
|
|
|
1252 |
$encryption_algorithms,
|
|
|
1253 |
array('twofish128-ctr', 'twofish192-ctr', 'twofish256-ctr', 'twofish128-cbc', 'twofish192-cbc', 'twofish256-cbc', 'twofish-cbc')
|
|
|
1254 |
);
|
|
|
1255 |
}
|
|
|
1256 |
if (class_exists('\phpseclib\Crypt\Blowfish') === false) {
|
|
|
1257 |
$encryption_algorithms = array_diff(
|
|
|
1258 |
$encryption_algorithms,
|
|
|
1259 |
array('blowfish-ctr', 'blowfish-cbc')
|
|
|
1260 |
);
|
|
|
1261 |
}
|
|
|
1262 |
if (class_exists('\phpseclib\Crypt\TripleDES') === false) {
|
|
|
1263 |
$encryption_algorithms = array_diff(
|
|
|
1264 |
$encryption_algorithms,
|
|
|
1265 |
array('3des-ctr', '3des-cbc')
|
|
|
1266 |
);
|
|
|
1267 |
}
|
|
|
1268 |
$encryption_algorithms = array_values($encryption_algorithms);
|
|
|
1269 |
|
|
|
1270 |
$mac_algorithms = array(
|
|
|
1271 |
// from <http://www.ietf.org/rfc/rfc6668.txt>:
|
|
|
1272 |
'hmac-sha2-256',// RECOMMENDED HMAC-SHA256 (digest length = key length = 32)
|
|
|
1273 |
|
|
|
1274 |
'hmac-sha1-96', // RECOMMENDED first 96 bits of HMAC-SHA1 (digest length = 12, key length = 20)
|
|
|
1275 |
'hmac-sha1', // REQUIRED HMAC-SHA1 (digest length = key length = 20)
|
|
|
1276 |
'hmac-md5-96', // OPTIONAL first 96 bits of HMAC-MD5 (digest length = 12, key length = 16)
|
|
|
1277 |
'hmac-md5', // OPTIONAL HMAC-MD5 (digest length = key length = 16)
|
|
|
1278 |
//'none' // OPTIONAL no MAC; NOT RECOMMENDED
|
|
|
1279 |
);
|
|
|
1280 |
|
|
|
1281 |
$compression_algorithms = array(
|
|
|
1282 |
'none' // REQUIRED no compression
|
|
|
1283 |
//'zlib' // OPTIONAL ZLIB (LZ77) compression
|
|
|
1284 |
);
|
|
|
1285 |
|
|
|
1286 |
// some SSH servers have buggy implementations of some of the above algorithms
|
|
|
1287 |
switch ($this->server_identifier) {
|
|
|
1288 |
case 'SSH-2.0-SSHD':
|
|
|
1289 |
$mac_algorithms = array_values(array_diff(
|
|
|
1290 |
$mac_algorithms,
|
|
|
1291 |
array('hmac-sha1-96', 'hmac-md5-96')
|
|
|
1292 |
));
|
|
|
1293 |
}
|
|
|
1294 |
|
|
|
1295 |
$str_kex_algorithms = implode(',', $kex_algorithms);
|
|
|
1296 |
$str_server_host_key_algorithms = implode(',', $server_host_key_algorithms);
|
|
|
1297 |
$encryption_algorithms_server_to_client = $encryption_algorithms_client_to_server = implode(',', $encryption_algorithms);
|
|
|
1298 |
$mac_algorithms_server_to_client = $mac_algorithms_client_to_server = implode(',', $mac_algorithms);
|
|
|
1299 |
$compression_algorithms_server_to_client = $compression_algorithms_client_to_server = implode(',', $compression_algorithms);
|
|
|
1300 |
|
|
|
1301 |
$client_cookie = Random::string(16);
|
|
|
1302 |
|
|
|
1303 |
$response = $kexinit_payload_server;
|
|
|
1304 |
$this->_string_shift($response, 1); // skip past the message number (it should be SSH_MSG_KEXINIT)
|
|
|
1305 |
$server_cookie = $this->_string_shift($response, 16);
|
|
|
1306 |
|
|
|
1307 |
$temp = unpack('Nlength', $this->_string_shift($response, 4));
|
|
|
1308 |
$this->kex_algorithms = explode(',', $this->_string_shift($response, $temp['length']));
|
|
|
1309 |
|
|
|
1310 |
$temp = unpack('Nlength', $this->_string_shift($response, 4));
|
|
|
1311 |
$this->server_host_key_algorithms = explode(',', $this->_string_shift($response, $temp['length']));
|
|
|
1312 |
|
|
|
1313 |
$temp = unpack('Nlength', $this->_string_shift($response, 4));
|
|
|
1314 |
$this->encryption_algorithms_client_to_server = explode(',', $this->_string_shift($response, $temp['length']));
|
|
|
1315 |
|
|
|
1316 |
$temp = unpack('Nlength', $this->_string_shift($response, 4));
|
|
|
1317 |
$this->encryption_algorithms_server_to_client = explode(',', $this->_string_shift($response, $temp['length']));
|
|
|
1318 |
|
|
|
1319 |
$temp = unpack('Nlength', $this->_string_shift($response, 4));
|
|
|
1320 |
$this->mac_algorithms_client_to_server = explode(',', $this->_string_shift($response, $temp['length']));
|
|
|
1321 |
|
|
|
1322 |
$temp = unpack('Nlength', $this->_string_shift($response, 4));
|
|
|
1323 |
$this->mac_algorithms_server_to_client = explode(',', $this->_string_shift($response, $temp['length']));
|
|
|
1324 |
|
|
|
1325 |
$temp = unpack('Nlength', $this->_string_shift($response, 4));
|
|
|
1326 |
$this->compression_algorithms_client_to_server = explode(',', $this->_string_shift($response, $temp['length']));
|
|
|
1327 |
|
|
|
1328 |
$temp = unpack('Nlength', $this->_string_shift($response, 4));
|
|
|
1329 |
$this->compression_algorithms_server_to_client = explode(',', $this->_string_shift($response, $temp['length']));
|
|
|
1330 |
|
|
|
1331 |
$temp = unpack('Nlength', $this->_string_shift($response, 4));
|
|
|
1332 |
$this->languages_client_to_server = explode(',', $this->_string_shift($response, $temp['length']));
|
|
|
1333 |
|
|
|
1334 |
$temp = unpack('Nlength', $this->_string_shift($response, 4));
|
|
|
1335 |
$this->languages_server_to_client = explode(',', $this->_string_shift($response, $temp['length']));
|
|
|
1336 |
|
|
|
1337 |
extract(unpack('Cfirst_kex_packet_follows', $this->_string_shift($response, 1)));
|
|
|
1338 |
$first_kex_packet_follows = $first_kex_packet_follows != 0;
|
|
|
1339 |
|
|
|
1340 |
// the sending of SSH2_MSG_KEXINIT could go in one of two places. this is the second place.
|
|
|
1341 |
$kexinit_payload_client = pack(
|
|
|
1342 |
'Ca*Na*Na*Na*Na*Na*Na*Na*Na*Na*Na*CN',
|
|
|
1343 |
NET_SSH2_MSG_KEXINIT,
|
|
|
1344 |
$client_cookie,
|
|
|
1345 |
strlen($str_kex_algorithms),
|
|
|
1346 |
$str_kex_algorithms,
|
|
|
1347 |
strlen($str_server_host_key_algorithms),
|
|
|
1348 |
$str_server_host_key_algorithms,
|
|
|
1349 |
strlen($encryption_algorithms_client_to_server),
|
|
|
1350 |
$encryption_algorithms_client_to_server,
|
|
|
1351 |
strlen($encryption_algorithms_server_to_client),
|
|
|
1352 |
$encryption_algorithms_server_to_client,
|
|
|
1353 |
strlen($mac_algorithms_client_to_server),
|
|
|
1354 |
$mac_algorithms_client_to_server,
|
|
|
1355 |
strlen($mac_algorithms_server_to_client),
|
|
|
1356 |
$mac_algorithms_server_to_client,
|
|
|
1357 |
strlen($compression_algorithms_client_to_server),
|
|
|
1358 |
$compression_algorithms_client_to_server,
|
|
|
1359 |
strlen($compression_algorithms_server_to_client),
|
|
|
1360 |
$compression_algorithms_server_to_client,
|
|
|
1361 |
0,
|
|
|
1362 |
'',
|
|
|
1363 |
0,
|
|
|
1364 |
'',
|
|
|
1365 |
0,
|
|
|
1366 |
|
|
|
1367 |
);
|
|
|
1368 |
|
|
|
1369 |
if (!$this->_send_binary_packet($kexinit_payload_client)) {
|
|
|
1370 |
return false;
|
|
|
1371 |
}
|
|
|
1372 |
// here ends the second place.
|
|
|
1373 |
|
|
|
1374 |
// we need to decide upon the symmetric encryption algorithms before we do the diffie-hellman key exchange
|
|
|
1375 |
// we don't initialize any crypto-objects, yet - we do that, later. for now, we need the lengths to make the
|
|
|
1376 |
// diffie-hellman key exchange as fast as possible
|
|
|
1377 |
$decrypt = $this->_array_intersect_first($encryption_algorithms, $this->encryption_algorithms_server_to_client);
|
|
|
1378 |
$decryptKeyLength = $this->_encryption_algorithm_to_key_size($decrypt);
|
|
|
1379 |
if ($decryptKeyLength === null) {
|
|
|
1380 |
user_error('No compatible server to client encryption algorithms found');
|
|
|
1381 |
return $this->_disconnect(NET_SSH2_DISCONNECT_KEY_EXCHANGE_FAILED);
|
|
|
1382 |
}
|
|
|
1383 |
|
|
|
1384 |
$encrypt = $this->_array_intersect_first($encryption_algorithms, $this->encryption_algorithms_client_to_server);
|
|
|
1385 |
$encryptKeyLength = $this->_encryption_algorithm_to_key_size($encrypt);
|
|
|
1386 |
if ($encryptKeyLength === null) {
|
|
|
1387 |
user_error('No compatible client to server encryption algorithms found');
|
|
|
1388 |
return $this->_disconnect(NET_SSH2_DISCONNECT_KEY_EXCHANGE_FAILED);
|
|
|
1389 |
}
|
|
|
1390 |
|
|
|
1391 |
// through diffie-hellman key exchange a symmetric key is obtained
|
|
|
1392 |
$kex_algorithm = $this->_array_intersect_first($kex_algorithms, $this->kex_algorithms);
|
|
|
1393 |
if ($kex_algorithm === false) {
|
|
|
1394 |
user_error('No compatible key exchange algorithms found');
|
|
|
1395 |
return $this->_disconnect(NET_SSH2_DISCONNECT_KEY_EXCHANGE_FAILED);
|
|
|
1396 |
}
|
|
|
1397 |
|
|
|
1398 |
// Only relevant in diffie-hellman-group-exchange-sha{1,256}, otherwise empty.
|
|
|
1399 |
$exchange_hash_rfc4419 = '';
|
|
|
1400 |
|
|
|
1401 |
if ($kex_algorithm === 'curve25519-sha256@libssh.org') {
|
|
|
1402 |
$x = Random::string(32);
|
|
|
1403 |
$eBytes = \Sodium\crypto_box_publickey_from_secretkey($x);
|
|
|
1404 |
$clientKexInitMessage = NET_SSH2_MSG_KEX_ECDH_INIT;
|
|
|
1405 |
$serverKexReplyMessage = NET_SSH2_MSG_KEX_ECDH_REPLY;
|
|
|
1406 |
$kexHash = new Hash('sha256');
|
|
|
1407 |
} else {
|
|
|
1408 |
if (strpos($kex_algorithm, 'diffie-hellman-group-exchange') === 0) {
|
|
|
1409 |
$dh_group_sizes_packed = pack(
|
|
|
1410 |
'NNN',
|
|
|
1411 |
$this->kex_dh_group_size_min,
|
|
|
1412 |
$this->kex_dh_group_size_preferred,
|
|
|
1413 |
$this->kex_dh_group_size_max
|
|
|
1414 |
);
|
|
|
1415 |
$packet = pack(
|
|
|
1416 |
'Ca*',
|
|
|
1417 |
NET_SSH2_MSG_KEXDH_GEX_REQUEST,
|
|
|
1418 |
$dh_group_sizes_packed
|
|
|
1419 |
);
|
|
|
1420 |
if (!$this->_send_binary_packet($packet)) {
|
|
|
1421 |
return false;
|
|
|
1422 |
}
|
|
|
1423 |
|
|
|
1424 |
$response = $this->_get_binary_packet();
|
|
|
1425 |
if ($response === false) {
|
|
|
1426 |
user_error('Connection closed by server');
|
|
|
1427 |
return false;
|
|
|
1428 |
}
|
|
|
1429 |
extract(unpack('Ctype', $this->_string_shift($response, 1)));
|
|
|
1430 |
if ($type != NET_SSH2_MSG_KEXDH_GEX_GROUP) {
|
|
|
1431 |
user_error('Expected SSH_MSG_KEX_DH_GEX_GROUP');
|
|
|
1432 |
return false;
|
|
|
1433 |
}
|
|
|
1434 |
|
|
|
1435 |
extract(unpack('NprimeLength', $this->_string_shift($response, 4)));
|
|
|
1436 |
$primeBytes = $this->_string_shift($response, $primeLength);
|
|
|
1437 |
$prime = new BigInteger($primeBytes, -256);
|
|
|
1438 |
|
|
|
1439 |
extract(unpack('NgLength', $this->_string_shift($response, 4)));
|
|
|
1440 |
$gBytes = $this->_string_shift($response, $gLength);
|
|
|
1441 |
$g = new BigInteger($gBytes, -256);
|
|
|
1442 |
|
|
|
1443 |
$exchange_hash_rfc4419 = pack(
|
|
|
1444 |
'a*Na*Na*',
|
|
|
1445 |
$dh_group_sizes_packed,
|
|
|
1446 |
$primeLength,
|
|
|
1447 |
$primeBytes,
|
|
|
1448 |
$gLength,
|
|
|
1449 |
$gBytes
|
|
|
1450 |
);
|
|
|
1451 |
|
|
|
1452 |
$clientKexInitMessage = NET_SSH2_MSG_KEXDH_GEX_INIT;
|
|
|
1453 |
$serverKexReplyMessage = NET_SSH2_MSG_KEXDH_GEX_REPLY;
|
|
|
1454 |
} else {
|
|
|
1455 |
switch ($kex_algorithm) {
|
|
|
1456 |
// see http://tools.ietf.org/html/rfc2409#section-6.2 and
|
|
|
1457 |
// http://tools.ietf.org/html/rfc2412, appendex E
|
|
|
1458 |
case 'diffie-hellman-group1-sha1':
|
|
|
1459 |
$prime = 'FFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD129024E088A67CC74' .
|
|
|
1460 |
'020BBEA63B139B22514A08798E3404DDEF9519B3CD3A431B302B0A6DF25F1437' .
|
|
|
1461 |
'4FE1356D6D51C245E485B576625E7EC6F44C42E9A637ED6B0BFF5CB6F406B7ED' .
|
|
|
1462 |
'EE386BFB5A899FA5AE9F24117C4B1FE649286651ECE65381FFFFFFFFFFFFFFFF';
|
|
|
1463 |
break;
|
|
|
1464 |
// see http://tools.ietf.org/html/rfc3526#section-3
|
|
|
1465 |
case 'diffie-hellman-group14-sha1':
|
|
|
1466 |
$prime = 'FFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD129024E088A67CC74' .
|
|
|
1467 |
'020BBEA63B139B22514A08798E3404DDEF9519B3CD3A431B302B0A6DF25F1437' .
|
|
|
1468 |
'4FE1356D6D51C245E485B576625E7EC6F44C42E9A637ED6B0BFF5CB6F406B7ED' .
|
|
|
1469 |
'EE386BFB5A899FA5AE9F24117C4B1FE649286651ECE45B3DC2007CB8A163BF05' .
|
|
|
1470 |
'98DA48361C55D39A69163FA8FD24CF5F83655D23DCA3AD961C62F356208552BB' .
|
|
|
1471 |
'9ED529077096966D670C354E4ABC9804F1746C08CA18217C32905E462E36CE3B' .
|
|
|
1472 |
'E39E772C180E86039B2783A2EC07A28FB5C55DF06F4C52C9DE2BCBF695581718' .
|
|
|
1473 |
'3995497CEA956AE515D2261898FA051015728E5A8AACAA68FFFFFFFFFFFFFFFF';
|
|
|
1474 |
break;
|
|
|
1475 |
}
|
|
|
1476 |
// For both diffie-hellman-group1-sha1 and diffie-hellman-group14-sha1
|
|
|
1477 |
// the generator field element is 2 (decimal) and the hash function is sha1.
|
|
|
1478 |
$g = new BigInteger(2);
|
|
|
1479 |
$prime = new BigInteger($prime, 16);
|
|
|
1480 |
$clientKexInitMessage = NET_SSH2_MSG_KEXDH_INIT;
|
|
|
1481 |
$serverKexReplyMessage = NET_SSH2_MSG_KEXDH_REPLY;
|
|
|
1482 |
}
|
|
|
1483 |
|
|
|
1484 |
switch ($kex_algorithm) {
|
|
|
1485 |
case 'diffie-hellman-group-exchange-sha256':
|
|
|
1486 |
$kexHash = new Hash('sha256');
|
|
|
1487 |
break;
|
|
|
1488 |
default:
|
|
|
1489 |
$kexHash = new Hash('sha1');
|
|
|
1490 |
}
|
|
|
1491 |
|
|
|
1492 |
/* To increase the speed of the key exchange, both client and server may
|
|
|
1493 |
reduce the size of their private exponents. It should be at least
|
|
|
1494 |
twice as long as the key material that is generated from the shared
|
|
|
1495 |
secret. For more details, see the paper by van Oorschot and Wiener
|
|
|
1496 |
[VAN-OORSCHOT].
|
|
|
1497 |
|
|
|
1498 |
-- http://tools.ietf.org/html/rfc4419#section-6.2 */
|
|
|
1499 |
$one = new BigInteger(1);
|
|
|
1500 |
$keyLength = min($kexHash->getLength(), max($encryptKeyLength, $decryptKeyLength));
|
|
|
1501 |
$max = $one->bitwise_leftShift(16 * $keyLength); // 2 * 8 * $keyLength
|
|
|
1502 |
$max = $max->subtract($one);
|
|
|
1503 |
|
|
|
1504 |
$x = $one->random($one, $max);
|
|
|
1505 |
$e = $g->modPow($x, $prime);
|
|
|
1506 |
|
|
|
1507 |
$eBytes = $e->toBytes(true);
|
|
|
1508 |
}
|
|
|
1509 |
$data = pack('CNa*', $clientKexInitMessage, strlen($eBytes), $eBytes);
|
|
|
1510 |
|
|
|
1511 |
if (!$this->_send_binary_packet($data)) {
|
|
|
1512 |
user_error('Connection closed by server');
|
|
|
1513 |
return false;
|
|
|
1514 |
}
|
|
|
1515 |
|
|
|
1516 |
$response = $this->_get_binary_packet();
|
|
|
1517 |
if ($response === false) {
|
|
|
1518 |
user_error('Connection closed by server');
|
|
|
1519 |
return false;
|
|
|
1520 |
}
|
|
|
1521 |
extract(unpack('Ctype', $this->_string_shift($response, 1)));
|
|
|
1522 |
|
|
|
1523 |
if ($type != $serverKexReplyMessage) {
|
|
|
1524 |
user_error('Expected SSH_MSG_KEXDH_REPLY');
|
|
|
1525 |
return false;
|
|
|
1526 |
}
|
|
|
1527 |
|
|
|
1528 |
$temp = unpack('Nlength', $this->_string_shift($response, 4));
|
|
|
1529 |
$this->server_public_host_key = $server_public_host_key = $this->_string_shift($response, $temp['length']);
|
|
|
1530 |
|
|
|
1531 |
$temp = unpack('Nlength', $this->_string_shift($server_public_host_key, 4));
|
|
|
1532 |
$public_key_format = $this->_string_shift($server_public_host_key, $temp['length']);
|
|
|
1533 |
|
|
|
1534 |
$temp = unpack('Nlength', $this->_string_shift($response, 4));
|
|
|
1535 |
$fBytes = $this->_string_shift($response, $temp['length']);
|
|
|
1536 |
|
|
|
1537 |
$temp = unpack('Nlength', $this->_string_shift($response, 4));
|
|
|
1538 |
$this->signature = $this->_string_shift($response, $temp['length']);
|
|
|
1539 |
|
|
|
1540 |
$temp = unpack('Nlength', $this->_string_shift($this->signature, 4));
|
|
|
1541 |
$this->signature_format = $this->_string_shift($this->signature, $temp['length']);
|
|
|
1542 |
|
|
|
1543 |
if ($kex_algorithm === 'curve25519-sha256@libssh.org') {
|
|
|
1544 |
if (strlen($fBytes) !== 32) {
|
|
|
1545 |
user_error('Received curve25519 public key of invalid length.');
|
|
|
1546 |
return false;
|
|
|
1547 |
}
|
|
|
1548 |
$key = new BigInteger(\Sodium\crypto_scalarmult($x, $fBytes), 256);
|
|
|
1549 |
\Sodium\memzero($x);
|
|
|
1550 |
} else {
|
|
|
1551 |
$f = new BigInteger($fBytes, -256);
|
|
|
1552 |
$key = $f->modPow($x, $prime);
|
|
|
1553 |
}
|
|
|
1554 |
$keyBytes = $key->toBytes(true);
|
|
|
1555 |
|
|
|
1556 |
$this->exchange_hash = pack(
|
|
|
1557 |
'Na*Na*Na*Na*Na*a*Na*Na*Na*',
|
|
|
1558 |
strlen($this->identifier),
|
|
|
1559 |
$this->identifier,
|
|
|
1560 |
strlen($this->server_identifier),
|
|
|
1561 |
$this->server_identifier,
|
|
|
1562 |
strlen($kexinit_payload_client),
|
|
|
1563 |
$kexinit_payload_client,
|
|
|
1564 |
strlen($kexinit_payload_server),
|
|
|
1565 |
$kexinit_payload_server,
|
|
|
1566 |
strlen($this->server_public_host_key),
|
|
|
1567 |
$this->server_public_host_key,
|
|
|
1568 |
$exchange_hash_rfc4419,
|
|
|
1569 |
strlen($eBytes),
|
|
|
1570 |
$eBytes,
|
|
|
1571 |
strlen($fBytes),
|
|
|
1572 |
$fBytes,
|
|
|
1573 |
strlen($keyBytes),
|
|
|
1574 |
$keyBytes
|
|
|
1575 |
);
|
|
|
1576 |
|
|
|
1577 |
$this->exchange_hash = $kexHash->hash($this->exchange_hash);
|
|
|
1578 |
|
|
|
1579 |
if ($this->session_id === false) {
|
|
|
1580 |
$this->session_id = $this->exchange_hash;
|
|
|
1581 |
}
|
|
|
1582 |
|
|
|
1583 |
$server_host_key_algorithm = $this->_array_intersect_first($server_host_key_algorithms, $this->server_host_key_algorithms);
|
|
|
1584 |
if ($server_host_key_algorithm === false) {
|
|
|
1585 |
user_error('No compatible server host key algorithms found');
|
|
|
1586 |
return $this->_disconnect(NET_SSH2_DISCONNECT_KEY_EXCHANGE_FAILED);
|
|
|
1587 |
}
|
|
|
1588 |
|
|
|
1589 |
if ($public_key_format != $server_host_key_algorithm || $this->signature_format != $server_host_key_algorithm) {
|
|
|
1590 |
user_error('Server Host Key Algorithm Mismatch');
|
|
|
1591 |
return $this->_disconnect(NET_SSH2_DISCONNECT_KEY_EXCHANGE_FAILED);
|
|
|
1592 |
}
|
|
|
1593 |
|
|
|
1594 |
$packet = pack(
|
|
|
1595 |
'C',
|
|
|
1596 |
NET_SSH2_MSG_NEWKEYS
|
|
|
1597 |
);
|
|
|
1598 |
|
|
|
1599 |
if (!$this->_send_binary_packet($packet)) {
|
|
|
1600 |
return false;
|
|
|
1601 |
}
|
|
|
1602 |
|
|
|
1603 |
$response = $this->_get_binary_packet();
|
|
|
1604 |
|
|
|
1605 |
if ($response === false) {
|
|
|
1606 |
user_error('Connection closed by server');
|
|
|
1607 |
return false;
|
|
|
1608 |
}
|
|
|
1609 |
|
|
|
1610 |
extract(unpack('Ctype', $this->_string_shift($response, 1)));
|
|
|
1611 |
|
|
|
1612 |
if ($type != NET_SSH2_MSG_NEWKEYS) {
|
|
|
1613 |
user_error('Expected SSH_MSG_NEWKEYS');
|
|
|
1614 |
return false;
|
|
|
1615 |
}
|
|
|
1616 |
|
|
|
1617 |
$keyBytes = pack('Na*', strlen($keyBytes), $keyBytes);
|
|
|
1618 |
|
|
|
1619 |
$this->encrypt = $this->_encryption_algorithm_to_crypt_instance($encrypt);
|
|
|
1620 |
if ($this->encrypt) {
|
|
|
1621 |
if ($this->crypto_engine) {
|
|
|
1622 |
$this->encrypt->setEngine($this->crypto_engine);
|
|
|
1623 |
}
|
|
|
1624 |
if ($this->encrypt->block_size) {
|
|
|
1625 |
$this->encrypt_block_size = $this->encrypt->block_size;
|
|
|
1626 |
}
|
|
|
1627 |
$this->encrypt->enableContinuousBuffer();
|
|
|
1628 |
$this->encrypt->disablePadding();
|
|
|
1629 |
|
|
|
1630 |
$iv = $kexHash->hash($keyBytes . $this->exchange_hash . 'A' . $this->session_id);
|
|
|
1631 |
while ($this->encrypt_block_size > strlen($iv)) {
|
|
|
1632 |
$iv.= $kexHash->hash($keyBytes . $this->exchange_hash . $iv);
|
|
|
1633 |
}
|
|
|
1634 |
$this->encrypt->setIV(substr($iv, 0, $this->encrypt_block_size));
|
|
|
1635 |
|
|
|
1636 |
$key = $kexHash->hash($keyBytes . $this->exchange_hash . 'C' . $this->session_id);
|
|
|
1637 |
while ($encryptKeyLength > strlen($key)) {
|
|
|
1638 |
$key.= $kexHash->hash($keyBytes . $this->exchange_hash . $key);
|
|
|
1639 |
}
|
|
|
1640 |
$this->encrypt->setKey(substr($key, 0, $encryptKeyLength));
|
|
|
1641 |
}
|
|
|
1642 |
|
|
|
1643 |
$this->decrypt = $this->_encryption_algorithm_to_crypt_instance($decrypt);
|
|
|
1644 |
if ($this->decrypt) {
|
|
|
1645 |
if ($this->crypto_engine) {
|
|
|
1646 |
$this->decrypt->setEngine($this->crypto_engine);
|
|
|
1647 |
}
|
|
|
1648 |
if ($this->decrypt->block_size) {
|
|
|
1649 |
$this->decrypt_block_size = $this->decrypt->block_size;
|
|
|
1650 |
}
|
|
|
1651 |
$this->decrypt->enableContinuousBuffer();
|
|
|
1652 |
$this->decrypt->disablePadding();
|
|
|
1653 |
|
|
|
1654 |
$iv = $kexHash->hash($keyBytes . $this->exchange_hash . 'B' . $this->session_id);
|
|
|
1655 |
while ($this->decrypt_block_size > strlen($iv)) {
|
|
|
1656 |
$iv.= $kexHash->hash($keyBytes . $this->exchange_hash . $iv);
|
|
|
1657 |
}
|
|
|
1658 |
$this->decrypt->setIV(substr($iv, 0, $this->decrypt_block_size));
|
|
|
1659 |
|
|
|
1660 |
$key = $kexHash->hash($keyBytes . $this->exchange_hash . 'D' . $this->session_id);
|
|
|
1661 |
while ($decryptKeyLength > strlen($key)) {
|
|
|
1662 |
$key.= $kexHash->hash($keyBytes . $this->exchange_hash . $key);
|
|
|
1663 |
}
|
|
|
1664 |
$this->decrypt->setKey(substr($key, 0, $decryptKeyLength));
|
|
|
1665 |
}
|
|
|
1666 |
|
|
|
1667 |
/* The "arcfour128" algorithm is the RC4 cipher, as described in
|
|
|
1668 |
[SCHNEIER], using a 128-bit key. The first 1536 bytes of keystream
|
|
|
1669 |
generated by the cipher MUST be discarded, and the first byte of the
|
|
|
1670 |
first encrypted packet MUST be encrypted using the 1537th byte of
|
|
|
1671 |
keystream.
|
|
|
1672 |
|
|
|
1673 |
-- http://tools.ietf.org/html/rfc4345#section-4 */
|
|
|
1674 |
if ($encrypt == 'arcfour128' || $encrypt == 'arcfour256') {
|
|
|
1675 |
$this->encrypt->encrypt(str_repeat("\0", 1536));
|
|
|
1676 |
}
|
|
|
1677 |
if ($decrypt == 'arcfour128' || $decrypt == 'arcfour256') {
|
|
|
1678 |
$this->decrypt->decrypt(str_repeat("\0", 1536));
|
|
|
1679 |
}
|
|
|
1680 |
|
|
|
1681 |
$mac_algorithm = $this->_array_intersect_first($mac_algorithms, $this->mac_algorithms_client_to_server);
|
|
|
1682 |
if ($mac_algorithm === false) {
|
|
|
1683 |
user_error('No compatible client to server message authentication algorithms found');
|
|
|
1684 |
return $this->_disconnect(NET_SSH2_DISCONNECT_KEY_EXCHANGE_FAILED);
|
|
|
1685 |
}
|
|
|
1686 |
|
|
|
1687 |
$createKeyLength = 0; // ie. $mac_algorithm == 'none'
|
|
|
1688 |
switch ($mac_algorithm) {
|
|
|
1689 |
case 'hmac-sha2-256':
|
|
|
1690 |
$this->hmac_create = new Hash('sha256');
|
|
|
1691 |
$createKeyLength = 32;
|
|
|
1692 |
break;
|
|
|
1693 |
case 'hmac-sha1':
|
|
|
1694 |
$this->hmac_create = new Hash('sha1');
|
|
|
1695 |
$createKeyLength = 20;
|
|
|
1696 |
break;
|
|
|
1697 |
case 'hmac-sha1-96':
|
|
|
1698 |
$this->hmac_create = new Hash('sha1-96');
|
|
|
1699 |
$createKeyLength = 20;
|
|
|
1700 |
break;
|
|
|
1701 |
case 'hmac-md5':
|
|
|
1702 |
$this->hmac_create = new Hash('md5');
|
|
|
1703 |
$createKeyLength = 16;
|
|
|
1704 |
break;
|
|
|
1705 |
case 'hmac-md5-96':
|
|
|
1706 |
$this->hmac_create = new Hash('md5-96');
|
|
|
1707 |
$createKeyLength = 16;
|
|
|
1708 |
}
|
|
|
1709 |
|
|
|
1710 |
$mac_algorithm = $this->_array_intersect_first($mac_algorithms, $this->mac_algorithms_server_to_client);
|
|
|
1711 |
if ($mac_algorithm === false) {
|
|
|
1712 |
user_error('No compatible server to client message authentication algorithms found');
|
|
|
1713 |
return $this->_disconnect(NET_SSH2_DISCONNECT_KEY_EXCHANGE_FAILED);
|
|
|
1714 |
}
|
|
|
1715 |
|
|
|
1716 |
$checkKeyLength = 0;
|
|
|
1717 |
$this->hmac_size = 0;
|
|
|
1718 |
switch ($mac_algorithm) {
|
|
|
1719 |
case 'hmac-sha2-256':
|
|
|
1720 |
$this->hmac_check = new Hash('sha256');
|
|
|
1721 |
$checkKeyLength = 32;
|
|
|
1722 |
$this->hmac_size = 32;
|
|
|
1723 |
break;
|
|
|
1724 |
case 'hmac-sha1':
|
|
|
1725 |
$this->hmac_check = new Hash('sha1');
|
|
|
1726 |
$checkKeyLength = 20;
|
|
|
1727 |
$this->hmac_size = 20;
|
|
|
1728 |
break;
|
|
|
1729 |
case 'hmac-sha1-96':
|
|
|
1730 |
$this->hmac_check = new Hash('sha1-96');
|
|
|
1731 |
$checkKeyLength = 20;
|
|
|
1732 |
$this->hmac_size = 12;
|
|
|
1733 |
break;
|
|
|
1734 |
case 'hmac-md5':
|
|
|
1735 |
$this->hmac_check = new Hash('md5');
|
|
|
1736 |
$checkKeyLength = 16;
|
|
|
1737 |
$this->hmac_size = 16;
|
|
|
1738 |
break;
|
|
|
1739 |
case 'hmac-md5-96':
|
|
|
1740 |
$this->hmac_check = new Hash('md5-96');
|
|
|
1741 |
$checkKeyLength = 16;
|
|
|
1742 |
$this->hmac_size = 12;
|
|
|
1743 |
}
|
|
|
1744 |
|
|
|
1745 |
$key = $kexHash->hash($keyBytes . $this->exchange_hash . 'E' . $this->session_id);
|
|
|
1746 |
while ($createKeyLength > strlen($key)) {
|
|
|
1747 |
$key.= $kexHash->hash($keyBytes . $this->exchange_hash . $key);
|
|
|
1748 |
}
|
|
|
1749 |
$this->hmac_create->setKey(substr($key, 0, $createKeyLength));
|
|
|
1750 |
|
|
|
1751 |
$key = $kexHash->hash($keyBytes . $this->exchange_hash . 'F' . $this->session_id);
|
|
|
1752 |
while ($checkKeyLength > strlen($key)) {
|
|
|
1753 |
$key.= $kexHash->hash($keyBytes . $this->exchange_hash . $key);
|
|
|
1754 |
}
|
|
|
1755 |
$this->hmac_check->setKey(substr($key, 0, $checkKeyLength));
|
|
|
1756 |
|
|
|
1757 |
$compression_algorithm = $this->_array_intersect_first($compression_algorithms, $this->compression_algorithms_server_to_client);
|
|
|
1758 |
if ($compression_algorithm === false) {
|
|
|
1759 |
user_error('No compatible server to client compression algorithms found');
|
|
|
1760 |
return $this->_disconnect(NET_SSH2_DISCONNECT_KEY_EXCHANGE_FAILED);
|
|
|
1761 |
}
|
|
|
1762 |
$this->decompress = $compression_algorithm == 'zlib';
|
|
|
1763 |
|
|
|
1764 |
$compression_algorithm = $this->_array_intersect_first($compression_algorithms, $this->compression_algorithms_client_to_server);
|
|
|
1765 |
if ($compression_algorithm === false) {
|
|
|
1766 |
user_error('No compatible client to server compression algorithms found');
|
|
|
1767 |
return $this->_disconnect(NET_SSH2_DISCONNECT_KEY_EXCHANGE_FAILED);
|
|
|
1768 |
}
|
|
|
1769 |
$this->compress = $compression_algorithm == 'zlib';
|
|
|
1770 |
|
|
|
1771 |
return true;
|
|
|
1772 |
}
|
|
|
1773 |
|
|
|
1774 |
/**
|
|
|
1775 |
* Maps an encryption algorithm name to the number of key bytes.
|
|
|
1776 |
*
|
|
|
1777 |
* @param string $algorithm Name of the encryption algorithm
|
|
|
1778 |
* @return int|null Number of bytes as an integer or null for unknown
|
|
|
1779 |
* @access private
|
|
|
1780 |
*/
|
|
|
1781 |
function _encryption_algorithm_to_key_size($algorithm)
|
|
|
1782 |
{
|
|
|
1783 |
switch ($algorithm) {
|
|
|
1784 |
case 'none':
|
|
|
1785 |
return 0;
|
|
|
1786 |
case 'aes128-cbc':
|
|
|
1787 |
case 'aes128-ctr':
|
|
|
1788 |
case 'arcfour':
|
|
|
1789 |
case 'arcfour128':
|
|
|
1790 |
case 'blowfish-cbc':
|
|
|
1791 |
case 'blowfish-ctr':
|
|
|
1792 |
case 'twofish128-cbc':
|
|
|
1793 |
case 'twofish128-ctr':
|
|
|
1794 |
return 16;
|
|
|
1795 |
case '3des-cbc':
|
|
|
1796 |
case '3des-ctr':
|
|
|
1797 |
case 'aes192-cbc':
|
|
|
1798 |
case 'aes192-ctr':
|
|
|
1799 |
case 'twofish192-cbc':
|
|
|
1800 |
case 'twofish192-ctr':
|
|
|
1801 |
return 24;
|
|
|
1802 |
case 'aes256-cbc':
|
|
|
1803 |
case 'aes256-ctr':
|
|
|
1804 |
case 'arcfour256':
|
|
|
1805 |
case 'twofish-cbc':
|
|
|
1806 |
case 'twofish256-cbc':
|
|
|
1807 |
case 'twofish256-ctr':
|
|
|
1808 |
return 32;
|
|
|
1809 |
}
|
|
|
1810 |
return null;
|
|
|
1811 |
}
|
|
|
1812 |
|
|
|
1813 |
/**
|
|
|
1814 |
* Maps an encryption algorithm name to an instance of a subclass of
|
|
|
1815 |
* \phpseclib\Crypt\Base.
|
|
|
1816 |
*
|
|
|
1817 |
* @param string $algorithm Name of the encryption algorithm
|
|
|
1818 |
* @return mixed Instance of \phpseclib\Crypt\Base or null for unknown
|
|
|
1819 |
* @access private
|
|
|
1820 |
*/
|
|
|
1821 |
function _encryption_algorithm_to_crypt_instance($algorithm)
|
|
|
1822 |
{
|
|
|
1823 |
switch ($algorithm) {
|
|
|
1824 |
case '3des-cbc':
|
|
|
1825 |
return new TripleDES();
|
|
|
1826 |
case '3des-ctr':
|
|
|
1827 |
return new TripleDES(Base::MODE_CTR);
|
|
|
1828 |
case 'aes256-cbc':
|
|
|
1829 |
case 'aes192-cbc':
|
|
|
1830 |
case 'aes128-cbc':
|
|
|
1831 |
return new Rijndael();
|
|
|
1832 |
case 'aes256-ctr':
|
|
|
1833 |
case 'aes192-ctr':
|
|
|
1834 |
case 'aes128-ctr':
|
|
|
1835 |
return new Rijndael(Base::MODE_CTR);
|
|
|
1836 |
case 'blowfish-cbc':
|
|
|
1837 |
return new Blowfish();
|
|
|
1838 |
case 'blowfish-ctr':
|
|
|
1839 |
return new Blowfish(Base::MODE_CTR);
|
|
|
1840 |
case 'twofish128-cbc':
|
|
|
1841 |
case 'twofish192-cbc':
|
|
|
1842 |
case 'twofish256-cbc':
|
|
|
1843 |
case 'twofish-cbc':
|
|
|
1844 |
return new Twofish();
|
|
|
1845 |
case 'twofish128-ctr':
|
|
|
1846 |
case 'twofish192-ctr':
|
|
|
1847 |
case 'twofish256-ctr':
|
|
|
1848 |
return new Twofish(Base::MODE_CTR);
|
|
|
1849 |
case 'arcfour':
|
|
|
1850 |
case 'arcfour128':
|
|
|
1851 |
case 'arcfour256':
|
|
|
1852 |
return new RC4();
|
|
|
1853 |
}
|
|
|
1854 |
return null;
|
|
|
1855 |
}
|
|
|
1856 |
|
|
|
1857 |
/**
|
|
|
1858 |
* Login
|
|
|
1859 |
*
|
|
|
1860 |
* The $password parameter can be a plaintext password, a \phpseclib\Crypt\RSA object or an array
|
|
|
1861 |
*
|
|
|
1862 |
* @param string $username
|
|
|
1863 |
* @param mixed $password
|
|
|
1864 |
* @param mixed $...
|
|
|
1865 |
* @return bool
|
|
|
1866 |
* @see self::_login()
|
|
|
1867 |
* @access public
|
|
|
1868 |
*/
|
|
|
1869 |
function login($username)
|
|
|
1870 |
{
|
|
|
1871 |
$args = func_get_args();
|
|
|
1872 |
return call_user_func_array(array(&$this, '_login'), $args);
|
|
|
1873 |
}
|
|
|
1874 |
|
|
|
1875 |
/**
|
|
|
1876 |
* Login Helper
|
|
|
1877 |
*
|
|
|
1878 |
* @param string $username
|
|
|
1879 |
* @param mixed $password
|
|
|
1880 |
* @param mixed $...
|
|
|
1881 |
* @return bool
|
|
|
1882 |
* @see self::_login_helper()
|
|
|
1883 |
* @access private
|
|
|
1884 |
*/
|
|
|
1885 |
function _login($username)
|
|
|
1886 |
{
|
|
|
1887 |
if (!($this->bitmap & self::MASK_CONSTRUCTOR)) {
|
|
|
1888 |
if (!$this->_connect()) {
|
|
|
1889 |
return false;
|
|
|
1890 |
}
|
|
|
1891 |
}
|
|
|
1892 |
|
|
|
1893 |
$args = array_slice(func_get_args(), 1);
|
|
|
1894 |
if (empty($args)) {
|
|
|
1895 |
return $this->_login_helper($username);
|
|
|
1896 |
}
|
|
|
1897 |
|
|
|
1898 |
foreach ($args as $arg) {
|
|
|
1899 |
if ($this->_login_helper($username, $arg)) {
|
|
|
1900 |
return true;
|
|
|
1901 |
}
|
|
|
1902 |
}
|
|
|
1903 |
return false;
|
|
|
1904 |
}
|
|
|
1905 |
|
|
|
1906 |
/**
|
|
|
1907 |
* Login Helper
|
|
|
1908 |
*
|
|
|
1909 |
* @param string $username
|
|
|
1910 |
* @param string $password
|
|
|
1911 |
* @return bool
|
|
|
1912 |
* @access private
|
|
|
1913 |
* @internal It might be worthwhile, at some point, to protect against {@link http://tools.ietf.org/html/rfc4251#section-9.3.9 traffic analysis}
|
|
|
1914 |
* by sending dummy SSH_MSG_IGNORE messages.
|
|
|
1915 |
*/
|
|
|
1916 |
function _login_helper($username, $password = null)
|
|
|
1917 |
{
|
|
|
1918 |
if (!($this->bitmap & self::MASK_CONNECTED)) {
|
|
|
1919 |
return false;
|
|
|
1920 |
}
|
|
|
1921 |
|
|
|
1922 |
if (!($this->bitmap & self::MASK_LOGIN_REQ)) {
|
|
|
1923 |
$packet = pack(
|
|
|
1924 |
'CNa*',
|
|
|
1925 |
NET_SSH2_MSG_SERVICE_REQUEST,
|
|
|
1926 |
strlen('ssh-userauth'),
|
|
|
1927 |
'ssh-userauth'
|
|
|
1928 |
);
|
|
|
1929 |
|
|
|
1930 |
if (!$this->_send_binary_packet($packet)) {
|
|
|
1931 |
return false;
|
|
|
1932 |
}
|
|
|
1933 |
|
|
|
1934 |
$response = $this->_get_binary_packet();
|
|
|
1935 |
if ($response === false) {
|
|
|
1936 |
user_error('Connection closed by server');
|
|
|
1937 |
return false;
|
|
|
1938 |
}
|
|
|
1939 |
|
|
|
1940 |
extract(unpack('Ctype', $this->_string_shift($response, 1)));
|
|
|
1941 |
|
|
|
1942 |
if ($type != NET_SSH2_MSG_SERVICE_ACCEPT) {
|
|
|
1943 |
user_error('Expected SSH_MSG_SERVICE_ACCEPT');
|
|
|
1944 |
return false;
|
|
|
1945 |
}
|
|
|
1946 |
$this->bitmap |= self::MASK_LOGIN_REQ;
|
|
|
1947 |
}
|
|
|
1948 |
|
|
|
1949 |
if (strlen($this->last_interactive_response)) {
|
|
|
1950 |
return !is_string($password) && !is_array($password) ? false : $this->_keyboard_interactive_process($password);
|
|
|
1951 |
}
|
|
|
1952 |
|
|
|
1953 |
if ($password instanceof RSA) {
|
|
|
1954 |
return $this->_privatekey_login($username, $password);
|
|
|
1955 |
} elseif ($password instanceof Agent) {
|
|
|
1956 |
return $this->_ssh_agent_login($username, $password);
|
|
|
1957 |
}
|
|
|
1958 |
|
|
|
1959 |
if (is_array($password)) {
|
|
|
1960 |
if ($this->_keyboard_interactive_login($username, $password)) {
|
|
|
1961 |
$this->bitmap |= self::MASK_LOGIN;
|
|
|
1962 |
return true;
|
|
|
1963 |
}
|
|
|
1964 |
return false;
|
|
|
1965 |
}
|
|
|
1966 |
|
|
|
1967 |
if (!isset($password)) {
|
|
|
1968 |
$packet = pack(
|
|
|
1969 |
'CNa*Na*Na*',
|
|
|
1970 |
NET_SSH2_MSG_USERAUTH_REQUEST,
|
|
|
1971 |
strlen($username),
|
|
|
1972 |
$username,
|
|
|
1973 |
strlen('ssh-connection'),
|
|
|
1974 |
'ssh-connection',
|
|
|
1975 |
strlen('none'),
|
|
|
1976 |
'none'
|
|
|
1977 |
);
|
|
|
1978 |
|
|
|
1979 |
if (!$this->_send_binary_packet($packet)) {
|
|
|
1980 |
return false;
|
|
|
1981 |
}
|
|
|
1982 |
|
|
|
1983 |
$response = $this->_get_binary_packet();
|
|
|
1984 |
if ($response === false) {
|
|
|
1985 |
user_error('Connection closed by server');
|
|
|
1986 |
return false;
|
|
|
1987 |
}
|
|
|
1988 |
|
|
|
1989 |
extract(unpack('Ctype', $this->_string_shift($response, 1)));
|
|
|
1990 |
|
|
|
1991 |
switch ($type) {
|
|
|
1992 |
case NET_SSH2_MSG_USERAUTH_SUCCESS:
|
|
|
1993 |
$this->bitmap |= self::MASK_LOGIN;
|
|
|
1994 |
return true;
|
|
|
1995 |
//case NET_SSH2_MSG_USERAUTH_FAILURE:
|
|
|
1996 |
default:
|
|
|
1997 |
return false;
|
|
|
1998 |
}
|
|
|
1999 |
}
|
|
|
2000 |
|
|
|
2001 |
$packet = pack(
|
|
|
2002 |
'CNa*Na*Na*CNa*',
|
|
|
2003 |
NET_SSH2_MSG_USERAUTH_REQUEST,
|
|
|
2004 |
strlen($username),
|
|
|
2005 |
$username,
|
|
|
2006 |
strlen('ssh-connection'),
|
|
|
2007 |
'ssh-connection',
|
|
|
2008 |
strlen('password'),
|
|
|
2009 |
'password',
|
|
|
2010 |
0,
|
|
|
2011 |
strlen($password),
|
|
|
2012 |
$password
|
|
|
2013 |
);
|
|
|
2014 |
|
|
|
2015 |
// remove the username and password from the logged packet
|
|
|
2016 |
if (!defined('NET_SSH2_LOGGING')) {
|
|
|
2017 |
$logged = null;
|
|
|
2018 |
} else {
|
|
|
2019 |
$logged = pack(
|
|
|
2020 |
'CNa*Na*Na*CNa*',
|
|
|
2021 |
NET_SSH2_MSG_USERAUTH_REQUEST,
|
|
|
2022 |
strlen('username'),
|
|
|
2023 |
'username',
|
|
|
2024 |
strlen('ssh-connection'),
|
|
|
2025 |
'ssh-connection',
|
|
|
2026 |
strlen('password'),
|
|
|
2027 |
'password',
|
|
|
2028 |
0,
|
|
|
2029 |
strlen('password'),
|
|
|
2030 |
'password'
|
|
|
2031 |
);
|
|
|
2032 |
}
|
|
|
2033 |
|
|
|
2034 |
if (!$this->_send_binary_packet($packet, $logged)) {
|
|
|
2035 |
return false;
|
|
|
2036 |
}
|
|
|
2037 |
|
|
|
2038 |
$response = $this->_get_binary_packet();
|
|
|
2039 |
if ($response === false) {
|
|
|
2040 |
user_error('Connection closed by server');
|
|
|
2041 |
return false;
|
|
|
2042 |
}
|
|
|
2043 |
|
|
|
2044 |
extract(unpack('Ctype', $this->_string_shift($response, 1)));
|
|
|
2045 |
|
|
|
2046 |
switch ($type) {
|
|
|
2047 |
case NET_SSH2_MSG_USERAUTH_PASSWD_CHANGEREQ: // in theory, the password can be changed
|
|
|
2048 |
if (defined('NET_SSH2_LOGGING')) {
|
|
|
2049 |
$this->message_number_log[count($this->message_number_log) - 1] = 'NET_SSH2_MSG_USERAUTH_PASSWD_CHANGEREQ';
|
|
|
2050 |
}
|
|
|
2051 |
extract(unpack('Nlength', $this->_string_shift($response, 4)));
|
|
|
2052 |
$this->errors[] = 'SSH_MSG_USERAUTH_PASSWD_CHANGEREQ: ' . utf8_decode($this->_string_shift($response, $length));
|
|
|
2053 |
return $this->_disconnect(NET_SSH2_DISCONNECT_AUTH_CANCELLED_BY_USER);
|
|
|
2054 |
case NET_SSH2_MSG_USERAUTH_FAILURE:
|
|
|
2055 |
// can we use keyboard-interactive authentication? if not then either the login is bad or the server employees
|
|
|
2056 |
// multi-factor authentication
|
|
|
2057 |
extract(unpack('Nlength', $this->_string_shift($response, 4)));
|
|
|
2058 |
$auth_methods = explode(',', $this->_string_shift($response, $length));
|
|
|
2059 |
extract(unpack('Cpartial_success', $this->_string_shift($response, 1)));
|
|
|
2060 |
$partial_success = $partial_success != 0;
|
|
|
2061 |
|
|
|
2062 |
if (!$partial_success && in_array('keyboard-interactive', $auth_methods)) {
|
|
|
2063 |
if ($this->_keyboard_interactive_login($username, $password)) {
|
|
|
2064 |
$this->bitmap |= self::MASK_LOGIN;
|
|
|
2065 |
return true;
|
|
|
2066 |
}
|
|
|
2067 |
return false;
|
|
|
2068 |
}
|
|
|
2069 |
return false;
|
|
|
2070 |
case NET_SSH2_MSG_USERAUTH_SUCCESS:
|
|
|
2071 |
$this->bitmap |= self::MASK_LOGIN;
|
|
|
2072 |
return true;
|
|
|
2073 |
}
|
|
|
2074 |
|
|
|
2075 |
return false;
|
|
|
2076 |
}
|
|
|
2077 |
|
|
|
2078 |
/**
|
|
|
2079 |
* Login via keyboard-interactive authentication
|
|
|
2080 |
*
|
|
|
2081 |
* See {@link http://tools.ietf.org/html/rfc4256 RFC4256} for details. This is not a full-featured keyboard-interactive authenticator.
|
|
|
2082 |
*
|
|
|
2083 |
* @param string $username
|
|
|
2084 |
* @param string $password
|
|
|
2085 |
* @return bool
|
|
|
2086 |
* @access private
|
|
|
2087 |
*/
|
|
|
2088 |
function _keyboard_interactive_login($username, $password)
|
|
|
2089 |
{
|
|
|
2090 |
$packet = pack(
|
|
|
2091 |
'CNa*Na*Na*Na*Na*',
|
|
|
2092 |
NET_SSH2_MSG_USERAUTH_REQUEST,
|
|
|
2093 |
strlen($username),
|
|
|
2094 |
$username,
|
|
|
2095 |
strlen('ssh-connection'),
|
|
|
2096 |
'ssh-connection',
|
|
|
2097 |
strlen('keyboard-interactive'),
|
|
|
2098 |
'keyboard-interactive',
|
|
|
2099 |
0,
|
|
|
2100 |
'',
|
|
|
2101 |
0,
|
|
|
2102 |
''
|
|
|
2103 |
);
|
|
|
2104 |
|
|
|
2105 |
if (!$this->_send_binary_packet($packet)) {
|
|
|
2106 |
return false;
|
|
|
2107 |
}
|
|
|
2108 |
|
|
|
2109 |
return $this->_keyboard_interactive_process($password);
|
|
|
2110 |
}
|
|
|
2111 |
|
|
|
2112 |
/**
|
|
|
2113 |
* Handle the keyboard-interactive requests / responses.
|
|
|
2114 |
*
|
|
|
2115 |
* @param string $responses...
|
|
|
2116 |
* @return bool
|
|
|
2117 |
* @access private
|
|
|
2118 |
*/
|
|
|
2119 |
function _keyboard_interactive_process()
|
|
|
2120 |
{
|
|
|
2121 |
$responses = func_get_args();
|
|
|
2122 |
|
|
|
2123 |
if (strlen($this->last_interactive_response)) {
|
|
|
2124 |
$response = $this->last_interactive_response;
|
|
|
2125 |
} else {
|
|
|
2126 |
$orig = $response = $this->_get_binary_packet();
|
|
|
2127 |
if ($response === false) {
|
|
|
2128 |
user_error('Connection closed by server');
|
|
|
2129 |
return false;
|
|
|
2130 |
}
|
|
|
2131 |
}
|
|
|
2132 |
|
|
|
2133 |
extract(unpack('Ctype', $this->_string_shift($response, 1)));
|
|
|
2134 |
|
|
|
2135 |
switch ($type) {
|
|
|
2136 |
case NET_SSH2_MSG_USERAUTH_INFO_REQUEST:
|
|
|
2137 |
extract(unpack('Nlength', $this->_string_shift($response, 4)));
|
|
|
2138 |
$this->_string_shift($response, $length); // name; may be empty
|
|
|
2139 |
extract(unpack('Nlength', $this->_string_shift($response, 4)));
|
|
|
2140 |
$this->_string_shift($response, $length); // instruction; may be empty
|
|
|
2141 |
extract(unpack('Nlength', $this->_string_shift($response, 4)));
|
|
|
2142 |
$this->_string_shift($response, $length); // language tag; may be empty
|
|
|
2143 |
extract(unpack('Nnum_prompts', $this->_string_shift($response, 4)));
|
|
|
2144 |
|
|
|
2145 |
for ($i = 0; $i < count($responses); $i++) {
|
|
|
2146 |
if (is_array($responses[$i])) {
|
|
|
2147 |
foreach ($responses[$i] as $key => $value) {
|
|
|
2148 |
$this->keyboard_requests_responses[$key] = $value;
|
|
|
2149 |
}
|
|
|
2150 |
unset($responses[$i]);
|
|
|
2151 |
}
|
|
|
2152 |
}
|
|
|
2153 |
$responses = array_values($responses);
|
|
|
2154 |
|
|
|
2155 |
if (isset($this->keyboard_requests_responses)) {
|
|
|
2156 |
for ($i = 0; $i < $num_prompts; $i++) {
|
|
|
2157 |
extract(unpack('Nlength', $this->_string_shift($response, 4)));
|
|
|
2158 |
// prompt - ie. "Password: "; must not be empty
|
|
|
2159 |
$prompt = $this->_string_shift($response, $length);
|
|
|
2160 |
//$echo = $this->_string_shift($response) != chr(0);
|
|
|
2161 |
foreach ($this->keyboard_requests_responses as $key => $value) {
|
|
|
2162 |
if (substr($prompt, 0, strlen($key)) == $key) {
|
|
|
2163 |
$responses[] = $value;
|
|
|
2164 |
break;
|
|
|
2165 |
}
|
|
|
2166 |
}
|
|
|
2167 |
}
|
|
|
2168 |
}
|
|
|
2169 |
|
|
|
2170 |
// see http://tools.ietf.org/html/rfc4256#section-3.2
|
|
|
2171 |
if (strlen($this->last_interactive_response)) {
|
|
|
2172 |
$this->last_interactive_response = '';
|
|
|
2173 |
} elseif (defined('NET_SSH2_LOGGING')) {
|
|
|
2174 |
$this->message_number_log[count($this->message_number_log) - 1] = str_replace(
|
|
|
2175 |
'UNKNOWN',
|
|
|
2176 |
'NET_SSH2_MSG_USERAUTH_INFO_REQUEST',
|
|
|
2177 |
$this->message_number_log[count($this->message_number_log) - 1]
|
|
|
2178 |
);
|
|
|
2179 |
}
|
|
|
2180 |
|
|
|
2181 |
if (!count($responses) && $num_prompts) {
|
|
|
2182 |
$this->last_interactive_response = $orig;
|
|
|
2183 |
return false;
|
|
|
2184 |
}
|
|
|
2185 |
|
|
|
2186 |
/*
|
|
|
2187 |
After obtaining the requested information from the user, the client
|
|
|
2188 |
MUST respond with an SSH_MSG_USERAUTH_INFO_RESPONSE message.
|
|
|
2189 |
*/
|
|
|
2190 |
// see http://tools.ietf.org/html/rfc4256#section-3.4
|
|
|
2191 |
$packet = $logged = pack('CN', NET_SSH2_MSG_USERAUTH_INFO_RESPONSE, count($responses));
|
|
|
2192 |
for ($i = 0; $i < count($responses); $i++) {
|
|
|
2193 |
$packet.= pack('Na*', strlen($responses[$i]), $responses[$i]);
|
|
|
2194 |
$logged.= pack('Na*', strlen('dummy-answer'), 'dummy-answer');
|
|
|
2195 |
}
|
|
|
2196 |
|
|
|
2197 |
if (!$this->_send_binary_packet($packet, $logged)) {
|
|
|
2198 |
return false;
|
|
|
2199 |
}
|
|
|
2200 |
|
|
|
2201 |
if (defined('NET_SSH2_LOGGING') && NET_SSH2_LOGGING == self::LOG_COMPLEX) {
|
|
|
2202 |
$this->message_number_log[count($this->message_number_log) - 1] = str_replace(
|
|
|
2203 |
'UNKNOWN',
|
|
|
2204 |
'NET_SSH2_MSG_USERAUTH_INFO_RESPONSE',
|
|
|
2205 |
$this->message_number_log[count($this->message_number_log) - 1]
|
|
|
2206 |
);
|
|
|
2207 |
}
|
|
|
2208 |
|
|
|
2209 |
/*
|
|
|
2210 |
After receiving the response, the server MUST send either an
|
|
|
2211 |
SSH_MSG_USERAUTH_SUCCESS, SSH_MSG_USERAUTH_FAILURE, or another
|
|
|
2212 |
SSH_MSG_USERAUTH_INFO_REQUEST message.
|
|
|
2213 |
*/
|
|
|
2214 |
// maybe phpseclib should force close the connection after x request / responses? unless something like that is done
|
|
|
2215 |
// there could be an infinite loop of request / responses.
|
|
|
2216 |
return $this->_keyboard_interactive_process();
|
|
|
2217 |
case NET_SSH2_MSG_USERAUTH_SUCCESS:
|
|
|
2218 |
return true;
|
|
|
2219 |
case NET_SSH2_MSG_USERAUTH_FAILURE:
|
|
|
2220 |
return false;
|
|
|
2221 |
}
|
|
|
2222 |
|
|
|
2223 |
return false;
|
|
|
2224 |
}
|
|
|
2225 |
|
|
|
2226 |
/**
|
|
|
2227 |
* Login with an ssh-agent provided key
|
|
|
2228 |
*
|
|
|
2229 |
* @param string $username
|
|
|
2230 |
* @param \phpseclib\System\SSH\Agent $agent
|
|
|
2231 |
* @return bool
|
|
|
2232 |
* @access private
|
|
|
2233 |
*/
|
|
|
2234 |
function _ssh_agent_login($username, $agent)
|
|
|
2235 |
{
|
|
|
2236 |
$this->agent = $agent;
|
|
|
2237 |
$keys = $agent->requestIdentities();
|
|
|
2238 |
foreach ($keys as $key) {
|
|
|
2239 |
if ($this->_privatekey_login($username, $key)) {
|
|
|
2240 |
return true;
|
|
|
2241 |
}
|
|
|
2242 |
}
|
|
|
2243 |
|
|
|
2244 |
return false;
|
|
|
2245 |
}
|
|
|
2246 |
|
|
|
2247 |
/**
|
|
|
2248 |
* Login with an RSA private key
|
|
|
2249 |
*
|
|
|
2250 |
* @param string $username
|
|
|
2251 |
* @param \phpseclib\Crypt\RSA $password
|
|
|
2252 |
* @return bool
|
|
|
2253 |
* @access private
|
|
|
2254 |
* @internal It might be worthwhile, at some point, to protect against {@link http://tools.ietf.org/html/rfc4251#section-9.3.9 traffic analysis}
|
|
|
2255 |
* by sending dummy SSH_MSG_IGNORE messages.
|
|
|
2256 |
*/
|
|
|
2257 |
function _privatekey_login($username, $privatekey)
|
|
|
2258 |
{
|
|
|
2259 |
// see http://tools.ietf.org/html/rfc4253#page-15
|
|
|
2260 |
$publickey = $privatekey->getPublicKey(RSA::PUBLIC_FORMAT_RAW);
|
|
|
2261 |
if ($publickey === false) {
|
|
|
2262 |
return false;
|
|
|
2263 |
}
|
|
|
2264 |
|
|
|
2265 |
$publickey = array(
|
|
|
2266 |
'e' => $publickey['e']->toBytes(true),
|
|
|
2267 |
'n' => $publickey['n']->toBytes(true)
|
|
|
2268 |
);
|
|
|
2269 |
$publickey = pack(
|
|
|
2270 |
'Na*Na*Na*',
|
|
|
2271 |
strlen('ssh-rsa'),
|
|
|
2272 |
'ssh-rsa',
|
|
|
2273 |
strlen($publickey['e']),
|
|
|
2274 |
$publickey['e'],
|
|
|
2275 |
strlen($publickey['n']),
|
|
|
2276 |
$publickey['n']
|
|
|
2277 |
);
|
|
|
2278 |
|
|
|
2279 |
$part1 = pack(
|
|
|
2280 |
'CNa*Na*Na*',
|
|
|
2281 |
NET_SSH2_MSG_USERAUTH_REQUEST,
|
|
|
2282 |
strlen($username),
|
|
|
2283 |
$username,
|
|
|
2284 |
strlen('ssh-connection'),
|
|
|
2285 |
'ssh-connection',
|
|
|
2286 |
strlen('publickey'),
|
|
|
2287 |
'publickey'
|
|
|
2288 |
);
|
|
|
2289 |
$part2 = pack('Na*Na*', strlen('ssh-rsa'), 'ssh-rsa', strlen($publickey), $publickey);
|
|
|
2290 |
|
|
|
2291 |
$packet = $part1 . chr(0) . $part2;
|
|
|
2292 |
if (!$this->_send_binary_packet($packet)) {
|
|
|
2293 |
return false;
|
|
|
2294 |
}
|
|
|
2295 |
|
|
|
2296 |
$response = $this->_get_binary_packet();
|
|
|
2297 |
if ($response === false) {
|
|
|
2298 |
user_error('Connection closed by server');
|
|
|
2299 |
return false;
|
|
|
2300 |
}
|
|
|
2301 |
|
|
|
2302 |
extract(unpack('Ctype', $this->_string_shift($response, 1)));
|
|
|
2303 |
|
|
|
2304 |
switch ($type) {
|
|
|
2305 |
case NET_SSH2_MSG_USERAUTH_FAILURE:
|
|
|
2306 |
extract(unpack('Nlength', $this->_string_shift($response, 4)));
|
|
|
2307 |
$this->errors[] = 'SSH_MSG_USERAUTH_FAILURE: ' . $this->_string_shift($response, $length);
|
|
|
2308 |
return false;
|
|
|
2309 |
case NET_SSH2_MSG_USERAUTH_PK_OK:
|
|
|
2310 |
// we'll just take it on faith that the public key blob and the public key algorithm name are as
|
|
|
2311 |
// they should be
|
|
|
2312 |
if (defined('NET_SSH2_LOGGING') && NET_SSH2_LOGGING == self::LOG_COMPLEX) {
|
|
|
2313 |
$this->message_number_log[count($this->message_number_log) - 1] = str_replace(
|
|
|
2314 |
'UNKNOWN',
|
|
|
2315 |
'NET_SSH2_MSG_USERAUTH_PK_OK',
|
|
|
2316 |
$this->message_number_log[count($this->message_number_log) - 1]
|
|
|
2317 |
);
|
|
|
2318 |
}
|
|
|
2319 |
}
|
|
|
2320 |
|
|
|
2321 |
$packet = $part1 . chr(1) . $part2;
|
|
|
2322 |
$privatekey->setSignatureMode(RSA::SIGNATURE_PKCS1);
|
|
|
2323 |
$signature = $privatekey->sign(pack('Na*a*', strlen($this->session_id), $this->session_id, $packet));
|
|
|
2324 |
$signature = pack('Na*Na*', strlen('ssh-rsa'), 'ssh-rsa', strlen($signature), $signature);
|
|
|
2325 |
$packet.= pack('Na*', strlen($signature), $signature);
|
|
|
2326 |
|
|
|
2327 |
if (!$this->_send_binary_packet($packet)) {
|
|
|
2328 |
return false;
|
|
|
2329 |
}
|
|
|
2330 |
|
|
|
2331 |
$response = $this->_get_binary_packet();
|
|
|
2332 |
if ($response === false) {
|
|
|
2333 |
user_error('Connection closed by server');
|
|
|
2334 |
return false;
|
|
|
2335 |
}
|
|
|
2336 |
|
|
|
2337 |
extract(unpack('Ctype', $this->_string_shift($response, 1)));
|
|
|
2338 |
|
|
|
2339 |
switch ($type) {
|
|
|
2340 |
case NET_SSH2_MSG_USERAUTH_FAILURE:
|
|
|
2341 |
// either the login is bad or the server employs multi-factor authentication
|
|
|
2342 |
return false;
|
|
|
2343 |
case NET_SSH2_MSG_USERAUTH_SUCCESS:
|
|
|
2344 |
$this->bitmap |= self::MASK_LOGIN;
|
|
|
2345 |
return true;
|
|
|
2346 |
}
|
|
|
2347 |
|
|
|
2348 |
return false;
|
|
|
2349 |
}
|
|
|
2350 |
|
|
|
2351 |
/**
|
|
|
2352 |
* Set Timeout
|
|
|
2353 |
*
|
|
|
2354 |
* $ssh->exec('ping 127.0.0.1'); on a Linux host will never return and will run indefinitely. setTimeout() makes it so it'll timeout.
|
|
|
2355 |
* Setting $timeout to false or 0 will mean there is no timeout.
|
|
|
2356 |
*
|
|
|
2357 |
* @param mixed $timeout
|
|
|
2358 |
* @access public
|
|
|
2359 |
*/
|
|
|
2360 |
function setTimeout($timeout)
|
|
|
2361 |
{
|
|
|
2362 |
$this->timeout = $this->curTimeout = $timeout;
|
|
|
2363 |
}
|
|
|
2364 |
|
|
|
2365 |
/**
|
|
|
2366 |
* Get the output from stdError
|
|
|
2367 |
*
|
|
|
2368 |
* @access public
|
|
|
2369 |
*/
|
|
|
2370 |
function getStdError()
|
|
|
2371 |
{
|
|
|
2372 |
return $this->stdErrorLog;
|
|
|
2373 |
}
|
|
|
2374 |
|
|
|
2375 |
/**
|
|
|
2376 |
* Execute Command
|
|
|
2377 |
*
|
|
|
2378 |
* If $callback is set to false then \phpseclib\Net\SSH2::_get_channel_packet(self::CHANNEL_EXEC) will need to be called manually.
|
|
|
2379 |
* In all likelihood, this is not a feature you want to be taking advantage of.
|
|
|
2380 |
*
|
|
|
2381 |
* @param string $command
|
|
|
2382 |
* @param Callback $callback
|
|
|
2383 |
* @return string
|
|
|
2384 |
* @access public
|
|
|
2385 |
*/
|
|
|
2386 |
function exec($command, $callback = null)
|
|
|
2387 |
{
|
|
|
2388 |
$this->curTimeout = $this->timeout;
|
|
|
2389 |
$this->is_timeout = false;
|
|
|
2390 |
$this->stdErrorLog = '';
|
|
|
2391 |
|
|
|
2392 |
if (!($this->bitmap & self::MASK_LOGIN)) {
|
|
|
2393 |
return false;
|
|
|
2394 |
}
|
|
|
2395 |
|
|
|
2396 |
// RFC4254 defines the (client) window size as "bytes the other party can send before it must wait for the window to
|
|
|
2397 |
// be adjusted". 0x7FFFFFFF is, at 2GB, the max size. technically, it should probably be decremented, but,
|
|
|
2398 |
// honestly, if you're transferring more than 2GB, you probably shouldn't be using phpseclib, anyway.
|
|
|
2399 |
// see http://tools.ietf.org/html/rfc4254#section-5.2 for more info
|
|
|
2400 |
$this->window_size_server_to_client[self::CHANNEL_EXEC] = $this->window_size;
|
|
|
2401 |
// 0x8000 is the maximum max packet size, per http://tools.ietf.org/html/rfc4253#section-6.1, although since PuTTy
|
|
|
2402 |
// uses 0x4000, that's what will be used here, as well.
|
|
|
2403 |
$packet_size = 0x4000;
|
|
|
2404 |
|
|
|
2405 |
$packet = pack(
|
|
|
2406 |
'CNa*N3',
|
|
|
2407 |
NET_SSH2_MSG_CHANNEL_OPEN,
|
|
|
2408 |
strlen('session'),
|
|
|
2409 |
'session',
|
|
|
2410 |
self::CHANNEL_EXEC,
|
|
|
2411 |
$this->window_size_server_to_client[self::CHANNEL_EXEC],
|
|
|
2412 |
$packet_size
|
|
|
2413 |
);
|
|
|
2414 |
|
|
|
2415 |
if (!$this->_send_binary_packet($packet)) {
|
|
|
2416 |
return false;
|
|
|
2417 |
}
|
|
|
2418 |
|
|
|
2419 |
$this->channel_status[self::CHANNEL_EXEC] = NET_SSH2_MSG_CHANNEL_OPEN;
|
|
|
2420 |
|
|
|
2421 |
$response = $this->_get_channel_packet(self::CHANNEL_EXEC);
|
|
|
2422 |
if ($response === false) {
|
|
|
2423 |
return false;
|
|
|
2424 |
}
|
|
|
2425 |
|
|
|
2426 |
if ($this->request_pty === true) {
|
|
|
2427 |
$terminal_modes = pack('C', NET_SSH2_TTY_OP_END);
|
|
|
2428 |
$packet = pack(
|
|
|
2429 |
'CNNa*CNa*N5a*',
|
|
|
2430 |
NET_SSH2_MSG_CHANNEL_REQUEST,
|
|
|
2431 |
$this->server_channels[self::CHANNEL_EXEC],
|
|
|
2432 |
strlen('pty-req'),
|
|
|
2433 |
'pty-req',
|
|
|
2434 |
1,
|
|
|
2435 |
strlen('vt100'),
|
|
|
2436 |
'vt100',
|
|
|
2437 |
$this->windowColumns,
|
|
|
2438 |
$this->windowRows,
|
|
|
2439 |
0,
|
|
|
2440 |
0,
|
|
|
2441 |
strlen($terminal_modes),
|
|
|
2442 |
$terminal_modes
|
|
|
2443 |
);
|
|
|
2444 |
|
|
|
2445 |
if (!$this->_send_binary_packet($packet)) {
|
|
|
2446 |
return false;
|
|
|
2447 |
}
|
|
|
2448 |
|
|
|
2449 |
$response = $this->_get_binary_packet();
|
|
|
2450 |
if ($response === false) {
|
|
|
2451 |
user_error('Connection closed by server');
|
|
|
2452 |
return false;
|
|
|
2453 |
}
|
|
|
2454 |
|
|
|
2455 |
list(, $type) = unpack('C', $this->_string_shift($response, 1));
|
|
|
2456 |
|
|
|
2457 |
switch ($type) {
|
|
|
2458 |
case NET_SSH2_MSG_CHANNEL_SUCCESS:
|
|
|
2459 |
break;
|
|
|
2460 |
case NET_SSH2_MSG_CHANNEL_FAILURE:
|
|
|
2461 |
default:
|
|
|
2462 |
user_error('Unable to request pseudo-terminal');
|
|
|
2463 |
return $this->_disconnect(NET_SSH2_DISCONNECT_BY_APPLICATION);
|
|
|
2464 |
}
|
|
|
2465 |
$this->in_request_pty_exec = true;
|
|
|
2466 |
}
|
|
|
2467 |
|
|
|
2468 |
// sending a pty-req SSH_MSG_CHANNEL_REQUEST message is unnecessary and, in fact, in most cases, slows things
|
|
|
2469 |
// down. the one place where it might be desirable is if you're doing something like \phpseclib\Net\SSH2::exec('ping localhost &').
|
|
|
2470 |
// with a pty-req SSH_MSG_CHANNEL_REQUEST, exec() will return immediately and the ping process will then
|
|
|
2471 |
// then immediately terminate. without such a request exec() will loop indefinitely. the ping process won't end but
|
|
|
2472 |
// neither will your script.
|
|
|
2473 |
|
|
|
2474 |
// although, in theory, the size of SSH_MSG_CHANNEL_REQUEST could exceed the maximum packet size established by
|
|
|
2475 |
// SSH_MSG_CHANNEL_OPEN_CONFIRMATION, RFC4254#section-5.1 states that the "maximum packet size" refers to the
|
|
|
2476 |
// "maximum size of an individual data packet". ie. SSH_MSG_CHANNEL_DATA. RFC4254#section-5.2 corroborates.
|
|
|
2477 |
$packet = pack(
|
|
|
2478 |
'CNNa*CNa*',
|
|
|
2479 |
NET_SSH2_MSG_CHANNEL_REQUEST,
|
|
|
2480 |
$this->server_channels[self::CHANNEL_EXEC],
|
|
|
2481 |
strlen('exec'),
|
|
|
2482 |
'exec',
|
|
|
2483 |
1,
|
|
|
2484 |
strlen($command),
|
|
|
2485 |
$command
|
|
|
2486 |
);
|
|
|
2487 |
if (!$this->_send_binary_packet($packet)) {
|
|
|
2488 |
return false;
|
|
|
2489 |
}
|
|
|
2490 |
|
|
|
2491 |
$this->channel_status[self::CHANNEL_EXEC] = NET_SSH2_MSG_CHANNEL_REQUEST;
|
|
|
2492 |
|
|
|
2493 |
$response = $this->_get_channel_packet(self::CHANNEL_EXEC);
|
|
|
2494 |
if ($response === false) {
|
|
|
2495 |
return false;
|
|
|
2496 |
}
|
|
|
2497 |
|
|
|
2498 |
$this->channel_status[self::CHANNEL_EXEC] = NET_SSH2_MSG_CHANNEL_DATA;
|
|
|
2499 |
|
|
|
2500 |
if ($callback === false || $this->in_request_pty_exec) {
|
|
|
2501 |
return true;
|
|
|
2502 |
}
|
|
|
2503 |
|
|
|
2504 |
$output = '';
|
|
|
2505 |
while (true) {
|
|
|
2506 |
$temp = $this->_get_channel_packet(self::CHANNEL_EXEC);
|
|
|
2507 |
switch (true) {
|
|
|
2508 |
case $temp === true:
|
|
|
2509 |
return is_callable($callback) ? true : $output;
|
|
|
2510 |
case $temp === false:
|
|
|
2511 |
return false;
|
|
|
2512 |
default:
|
|
|
2513 |
if (is_callable($callback)) {
|
|
|
2514 |
if (call_user_func($callback, $temp) === true) {
|
|
|
2515 |
$this->_close_channel(self::CHANNEL_EXEC);
|
|
|
2516 |
return true;
|
|
|
2517 |
}
|
|
|
2518 |
} else {
|
|
|
2519 |
$output.= $temp;
|
|
|
2520 |
}
|
|
|
2521 |
}
|
|
|
2522 |
}
|
|
|
2523 |
}
|
|
|
2524 |
|
|
|
2525 |
/**
|
|
|
2526 |
* Creates an interactive shell
|
|
|
2527 |
*
|
|
|
2528 |
* @see self::read()
|
|
|
2529 |
* @see self::write()
|
|
|
2530 |
* @return bool
|
|
|
2531 |
* @access private
|
|
|
2532 |
*/
|
|
|
2533 |
function _initShell()
|
|
|
2534 |
{
|
|
|
2535 |
if ($this->in_request_pty_exec === true) {
|
|
|
2536 |
return true;
|
|
|
2537 |
}
|
|
|
2538 |
|
|
|
2539 |
$this->window_size_server_to_client[self::CHANNEL_SHELL] = $this->window_size;
|
|
|
2540 |
$packet_size = 0x4000;
|
|
|
2541 |
|
|
|
2542 |
$packet = pack(
|
|
|
2543 |
'CNa*N3',
|
|
|
2544 |
NET_SSH2_MSG_CHANNEL_OPEN,
|
|
|
2545 |
strlen('session'),
|
|
|
2546 |
'session',
|
|
|
2547 |
self::CHANNEL_SHELL,
|
|
|
2548 |
$this->window_size_server_to_client[self::CHANNEL_SHELL],
|
|
|
2549 |
$packet_size
|
|
|
2550 |
);
|
|
|
2551 |
|
|
|
2552 |
if (!$this->_send_binary_packet($packet)) {
|
|
|
2553 |
return false;
|
|
|
2554 |
}
|
|
|
2555 |
|
|
|
2556 |
$this->channel_status[self::CHANNEL_SHELL] = NET_SSH2_MSG_CHANNEL_OPEN;
|
|
|
2557 |
|
|
|
2558 |
$response = $this->_get_channel_packet(self::CHANNEL_SHELL);
|
|
|
2559 |
if ($response === false) {
|
|
|
2560 |
return false;
|
|
|
2561 |
}
|
|
|
2562 |
|
|
|
2563 |
$terminal_modes = pack('C', NET_SSH2_TTY_OP_END);
|
|
|
2564 |
$packet = pack(
|
|
|
2565 |
'CNNa*CNa*N5a*',
|
|
|
2566 |
NET_SSH2_MSG_CHANNEL_REQUEST,
|
|
|
2567 |
$this->server_channels[self::CHANNEL_SHELL],
|
|
|
2568 |
strlen('pty-req'),
|
|
|
2569 |
'pty-req',
|
|
|
2570 |
1,
|
|
|
2571 |
strlen('vt100'),
|
|
|
2572 |
'vt100',
|
|
|
2573 |
$this->windowColumns,
|
|
|
2574 |
$this->windowRows,
|
|
|
2575 |
0,
|
|
|
2576 |
0,
|
|
|
2577 |
strlen($terminal_modes),
|
|
|
2578 |
$terminal_modes
|
|
|
2579 |
);
|
|
|
2580 |
|
|
|
2581 |
if (!$this->_send_binary_packet($packet)) {
|
|
|
2582 |
return false;
|
|
|
2583 |
}
|
|
|
2584 |
|
|
|
2585 |
$response = $this->_get_binary_packet();
|
|
|
2586 |
if ($response === false) {
|
|
|
2587 |
user_error('Connection closed by server');
|
|
|
2588 |
return false;
|
|
|
2589 |
}
|
|
|
2590 |
|
|
|
2591 |
list(, $type) = unpack('C', $this->_string_shift($response, 1));
|
|
|
2592 |
|
|
|
2593 |
switch ($type) {
|
|
|
2594 |
case NET_SSH2_MSG_CHANNEL_SUCCESS:
|
|
|
2595 |
// if a pty can't be opened maybe commands can still be executed
|
|
|
2596 |
case NET_SSH2_MSG_CHANNEL_FAILURE:
|
|
|
2597 |
break;
|
|
|
2598 |
default:
|
|
|
2599 |
user_error('Unable to request pseudo-terminal');
|
|
|
2600 |
return $this->_disconnect(NET_SSH2_DISCONNECT_BY_APPLICATION);
|
|
|
2601 |
}
|
|
|
2602 |
|
|
|
2603 |
$packet = pack(
|
|
|
2604 |
'CNNa*C',
|
|
|
2605 |
NET_SSH2_MSG_CHANNEL_REQUEST,
|
|
|
2606 |
$this->server_channels[self::CHANNEL_SHELL],
|
|
|
2607 |
strlen('shell'),
|
|
|
2608 |
'shell',
|
|
|
2609 |
1
|
|
|
2610 |
);
|
|
|
2611 |
if (!$this->_send_binary_packet($packet)) {
|
|
|
2612 |
return false;
|
|
|
2613 |
}
|
|
|
2614 |
|
|
|
2615 |
$this->channel_status[self::CHANNEL_SHELL] = NET_SSH2_MSG_CHANNEL_REQUEST;
|
|
|
2616 |
|
|
|
2617 |
$response = $this->_get_channel_packet(self::CHANNEL_SHELL);
|
|
|
2618 |
if ($response === false) {
|
|
|
2619 |
return false;
|
|
|
2620 |
}
|
|
|
2621 |
|
|
|
2622 |
$this->channel_status[self::CHANNEL_SHELL] = NET_SSH2_MSG_CHANNEL_DATA;
|
|
|
2623 |
|
|
|
2624 |
$this->bitmap |= self::MASK_SHELL;
|
|
|
2625 |
|
|
|
2626 |
return true;
|
|
|
2627 |
}
|
|
|
2628 |
|
|
|
2629 |
/**
|
|
|
2630 |
* Return the channel to be used with read() / write()
|
|
|
2631 |
*
|
|
|
2632 |
* @see self::read()
|
|
|
2633 |
* @see self::write()
|
|
|
2634 |
* @return int
|
|
|
2635 |
* @access public
|
|
|
2636 |
*/
|
|
|
2637 |
function _get_interactive_channel()
|
|
|
2638 |
{
|
|
|
2639 |
switch (true) {
|
|
|
2640 |
case $this->in_subsystem:
|
|
|
2641 |
return self::CHANNEL_SUBSYSTEM;
|
|
|
2642 |
case $this->in_request_pty_exec:
|
|
|
2643 |
return self::CHANNEL_EXEC;
|
|
|
2644 |
default:
|
|
|
2645 |
return self::CHANNEL_SHELL;
|
|
|
2646 |
}
|
|
|
2647 |
}
|
|
|
2648 |
|
|
|
2649 |
/**
|
|
|
2650 |
* Return an available open channel
|
|
|
2651 |
*
|
|
|
2652 |
* @return int
|
|
|
2653 |
* @access public
|
|
|
2654 |
*/
|
|
|
2655 |
function _get_open_channel()
|
|
|
2656 |
{
|
|
|
2657 |
$channel = self::CHANNEL_EXEC;
|
|
|
2658 |
do {
|
|
|
2659 |
if (isset($this->channel_status[$channel]) && $this->channel_status[$channel] == NET_SSH2_MSG_CHANNEL_OPEN) {
|
|
|
2660 |
return $channel;
|
|
|
2661 |
}
|
|
|
2662 |
} while ($channel++ < self::CHANNEL_SUBSYSTEM);
|
|
|
2663 |
|
|
|
2664 |
return false;
|
|
|
2665 |
}
|
|
|
2666 |
|
|
|
2667 |
/**
|
|
|
2668 |
* Returns the output of an interactive shell
|
|
|
2669 |
*
|
|
|
2670 |
* Returns when there's a match for $expect, which can take the form of a string literal or,
|
|
|
2671 |
* if $mode == self::READ_REGEX, a regular expression.
|
|
|
2672 |
*
|
|
|
2673 |
* @see self::write()
|
|
|
2674 |
* @param string $expect
|
|
|
2675 |
* @param int $mode
|
|
|
2676 |
* @return string
|
|
|
2677 |
* @access public
|
|
|
2678 |
*/
|
|
|
2679 |
function read($expect = '', $mode = self::READ_SIMPLE)
|
|
|
2680 |
{
|
|
|
2681 |
$this->curTimeout = $this->timeout;
|
|
|
2682 |
$this->is_timeout = false;
|
|
|
2683 |
|
|
|
2684 |
if (!($this->bitmap & self::MASK_LOGIN)) {
|
|
|
2685 |
user_error('Operation disallowed prior to login()');
|
|
|
2686 |
return false;
|
|
|
2687 |
}
|
|
|
2688 |
|
|
|
2689 |
if (!($this->bitmap & self::MASK_SHELL) && !$this->_initShell()) {
|
|
|
2690 |
user_error('Unable to initiate an interactive shell session');
|
|
|
2691 |
return false;
|
|
|
2692 |
}
|
|
|
2693 |
|
|
|
2694 |
$channel = $this->_get_interactive_channel();
|
|
|
2695 |
|
|
|
2696 |
$match = $expect;
|
|
|
2697 |
while (true) {
|
|
|
2698 |
if ($mode == self::READ_REGEX) {
|
|
|
2699 |
preg_match($expect, substr($this->interactiveBuffer, -1024), $matches);
|
|
|
2700 |
$match = isset($matches[0]) ? $matches[0] : '';
|
|
|
2701 |
}
|
|
|
2702 |
$pos = strlen($match) ? strpos($this->interactiveBuffer, $match) : false;
|
|
|
2703 |
if ($pos !== false) {
|
|
|
2704 |
return $this->_string_shift($this->interactiveBuffer, $pos + strlen($match));
|
|
|
2705 |
}
|
|
|
2706 |
$response = $this->_get_channel_packet($channel);
|
|
|
2707 |
if (is_bool($response)) {
|
|
|
2708 |
$this->in_request_pty_exec = false;
|
|
|
2709 |
return $response ? $this->_string_shift($this->interactiveBuffer, strlen($this->interactiveBuffer)) : false;
|
|
|
2710 |
}
|
|
|
2711 |
|
|
|
2712 |
$this->interactiveBuffer.= $response;
|
|
|
2713 |
}
|
|
|
2714 |
}
|
|
|
2715 |
|
|
|
2716 |
/**
|
|
|
2717 |
* Inputs a command into an interactive shell.
|
|
|
2718 |
*
|
|
|
2719 |
* @see self::read()
|
|
|
2720 |
* @param string $cmd
|
|
|
2721 |
* @return bool
|
|
|
2722 |
* @access public
|
|
|
2723 |
*/
|
|
|
2724 |
function write($cmd)
|
|
|
2725 |
{
|
|
|
2726 |
if (!($this->bitmap & self::MASK_LOGIN)) {
|
|
|
2727 |
user_error('Operation disallowed prior to login()');
|
|
|
2728 |
return false;
|
|
|
2729 |
}
|
|
|
2730 |
|
|
|
2731 |
if (!($this->bitmap & self::MASK_SHELL) && !$this->_initShell()) {
|
|
|
2732 |
user_error('Unable to initiate an interactive shell session');
|
|
|
2733 |
return false;
|
|
|
2734 |
}
|
|
|
2735 |
|
|
|
2736 |
return $this->_send_channel_packet($this->_get_interactive_channel(), $cmd);
|
|
|
2737 |
}
|
|
|
2738 |
|
|
|
2739 |
/**
|
|
|
2740 |
* Start a subsystem.
|
|
|
2741 |
*
|
|
|
2742 |
* Right now only one subsystem at a time is supported. To support multiple subsystem's stopSubsystem() could accept
|
|
|
2743 |
* a string that contained the name of the subsystem, but at that point, only one subsystem of each type could be opened.
|
|
|
2744 |
* To support multiple subsystem's of the same name maybe it'd be best if startSubsystem() generated a new channel id and
|
|
|
2745 |
* returns that and then that that was passed into stopSubsystem() but that'll be saved for a future date and implemented
|
|
|
2746 |
* if there's sufficient demand for such a feature.
|
|
|
2747 |
*
|
|
|
2748 |
* @see self::stopSubsystem()
|
|
|
2749 |
* @param string $subsystem
|
|
|
2750 |
* @return bool
|
|
|
2751 |
* @access public
|
|
|
2752 |
*/
|
|
|
2753 |
function startSubsystem($subsystem)
|
|
|
2754 |
{
|
|
|
2755 |
$this->window_size_server_to_client[self::CHANNEL_SUBSYSTEM] = $this->window_size;
|
|
|
2756 |
|
|
|
2757 |
$packet = pack(
|
|
|
2758 |
'CNa*N3',
|
|
|
2759 |
NET_SSH2_MSG_CHANNEL_OPEN,
|
|
|
2760 |
strlen('session'),
|
|
|
2761 |
'session',
|
|
|
2762 |
self::CHANNEL_SUBSYSTEM,
|
|
|
2763 |
$this->window_size,
|
|
|
2764 |
0x4000
|
|
|
2765 |
);
|
|
|
2766 |
|
|
|
2767 |
if (!$this->_send_binary_packet($packet)) {
|
|
|
2768 |
return false;
|
|
|
2769 |
}
|
|
|
2770 |
|
|
|
2771 |
$this->channel_status[self::CHANNEL_SUBSYSTEM] = NET_SSH2_MSG_CHANNEL_OPEN;
|
|
|
2772 |
|
|
|
2773 |
$response = $this->_get_channel_packet(self::CHANNEL_SUBSYSTEM);
|
|
|
2774 |
if ($response === false) {
|
|
|
2775 |
return false;
|
|
|
2776 |
}
|
|
|
2777 |
|
|
|
2778 |
$packet = pack(
|
|
|
2779 |
'CNNa*CNa*',
|
|
|
2780 |
NET_SSH2_MSG_CHANNEL_REQUEST,
|
|
|
2781 |
$this->server_channels[self::CHANNEL_SUBSYSTEM],
|
|
|
2782 |
strlen('subsystem'),
|
|
|
2783 |
'subsystem',
|
|
|
2784 |
1,
|
|
|
2785 |
strlen($subsystem),
|
|
|
2786 |
$subsystem
|
|
|
2787 |
);
|
|
|
2788 |
if (!$this->_send_binary_packet($packet)) {
|
|
|
2789 |
return false;
|
|
|
2790 |
}
|
|
|
2791 |
|
|
|
2792 |
$this->channel_status[self::CHANNEL_SUBSYSTEM] = NET_SSH2_MSG_CHANNEL_REQUEST;
|
|
|
2793 |
|
|
|
2794 |
$response = $this->_get_channel_packet(self::CHANNEL_SUBSYSTEM);
|
|
|
2795 |
|
|
|
2796 |
if ($response === false) {
|
|
|
2797 |
return false;
|
|
|
2798 |
}
|
|
|
2799 |
|
|
|
2800 |
$this->channel_status[self::CHANNEL_SUBSYSTEM] = NET_SSH2_MSG_CHANNEL_DATA;
|
|
|
2801 |
|
|
|
2802 |
$this->bitmap |= self::MASK_SHELL;
|
|
|
2803 |
$this->in_subsystem = true;
|
|
|
2804 |
|
|
|
2805 |
return true;
|
|
|
2806 |
}
|
|
|
2807 |
|
|
|
2808 |
/**
|
|
|
2809 |
* Stops a subsystem.
|
|
|
2810 |
*
|
|
|
2811 |
* @see self::startSubsystem()
|
|
|
2812 |
* @return bool
|
|
|
2813 |
* @access public
|
|
|
2814 |
*/
|
|
|
2815 |
function stopSubsystem()
|
|
|
2816 |
{
|
|
|
2817 |
$this->in_subsystem = false;
|
|
|
2818 |
$this->_close_channel(self::CHANNEL_SUBSYSTEM);
|
|
|
2819 |
return true;
|
|
|
2820 |
}
|
|
|
2821 |
|
|
|
2822 |
/**
|
|
|
2823 |
* Closes a channel
|
|
|
2824 |
*
|
|
|
2825 |
* If read() timed out you might want to just close the channel and have it auto-restart on the next read() call
|
|
|
2826 |
*
|
|
|
2827 |
* @access public
|
|
|
2828 |
*/
|
|
|
2829 |
function reset()
|
|
|
2830 |
{
|
|
|
2831 |
$this->_close_channel($this->_get_interactive_channel());
|
|
|
2832 |
}
|
|
|
2833 |
|
|
|
2834 |
/**
|
|
|
2835 |
* Is timeout?
|
|
|
2836 |
*
|
|
|
2837 |
* Did exec() or read() return because they timed out or because they encountered the end?
|
|
|
2838 |
*
|
|
|
2839 |
* @access public
|
|
|
2840 |
*/
|
|
|
2841 |
function isTimeout()
|
|
|
2842 |
{
|
|
|
2843 |
return $this->is_timeout;
|
|
|
2844 |
}
|
|
|
2845 |
|
|
|
2846 |
/**
|
|
|
2847 |
* Disconnect
|
|
|
2848 |
*
|
|
|
2849 |
* @access public
|
|
|
2850 |
*/
|
|
|
2851 |
function disconnect()
|
|
|
2852 |
{
|
|
|
2853 |
$this->_disconnect(NET_SSH2_DISCONNECT_BY_APPLICATION);
|
|
|
2854 |
if (isset($this->realtime_log_file) && is_resource($this->realtime_log_file)) {
|
|
|
2855 |
fclose($this->realtime_log_file);
|
|
|
2856 |
}
|
|
|
2857 |
}
|
|
|
2858 |
|
|
|
2859 |
/**
|
|
|
2860 |
* Destructor.
|
|
|
2861 |
*
|
|
|
2862 |
* Will be called, automatically, if you're supporting just PHP5. If you're supporting PHP4, you'll need to call
|
|
|
2863 |
* disconnect().
|
|
|
2864 |
*
|
|
|
2865 |
* @access public
|
|
|
2866 |
*/
|
|
|
2867 |
function __destruct()
|
|
|
2868 |
{
|
|
|
2869 |
$this->disconnect();
|
|
|
2870 |
}
|
|
|
2871 |
|
|
|
2872 |
/**
|
|
|
2873 |
* Is the connection still active?
|
|
|
2874 |
*
|
|
|
2875 |
* @return bool
|
|
|
2876 |
* @access public
|
|
|
2877 |
*/
|
|
|
2878 |
function isConnected()
|
|
|
2879 |
{
|
|
|
2880 |
return (bool) ($this->bitmap & self::MASK_CONNECTED);
|
|
|
2881 |
}
|
|
|
2882 |
|
|
|
2883 |
/**
|
|
|
2884 |
* Have you successfully been logged in?
|
|
|
2885 |
*
|
|
|
2886 |
* @return bool
|
|
|
2887 |
* @access public
|
|
|
2888 |
*/
|
|
|
2889 |
function isAuthenticated()
|
|
|
2890 |
{
|
|
|
2891 |
return (bool) ($this->bitmap & self::MASK_LOGIN);
|
|
|
2892 |
}
|
|
|
2893 |
|
|
|
2894 |
/**
|
|
|
2895 |
* Gets Binary Packets
|
|
|
2896 |
*
|
|
|
2897 |
* See '6. Binary Packet Protocol' of rfc4253 for more info.
|
|
|
2898 |
*
|
|
|
2899 |
* @see self::_send_binary_packet()
|
|
|
2900 |
* @return string
|
|
|
2901 |
* @access private
|
|
|
2902 |
*/
|
|
|
2903 |
function _get_binary_packet()
|
|
|
2904 |
{
|
|
|
2905 |
if (!is_resource($this->fsock) || feof($this->fsock)) {
|
|
|
2906 |
user_error('Connection closed prematurely');
|
|
|
2907 |
$this->bitmap = 0;
|
|
|
2908 |
return false;
|
|
|
2909 |
}
|
|
|
2910 |
|
|
|
2911 |
$start = microtime(true);
|
|
|
2912 |
$raw = stream_get_contents($this->fsock, $this->decrypt_block_size);
|
|
|
2913 |
|
|
|
2914 |
if (!strlen($raw)) {
|
|
|
2915 |
return '';
|
|
|
2916 |
}
|
|
|
2917 |
|
|
|
2918 |
if ($this->decrypt !== false) {
|
|
|
2919 |
$raw = $this->decrypt->decrypt($raw);
|
|
|
2920 |
}
|
|
|
2921 |
if ($raw === false) {
|
|
|
2922 |
user_error('Unable to decrypt content');
|
|
|
2923 |
return false;
|
|
|
2924 |
}
|
|
|
2925 |
|
|
|
2926 |
extract(unpack('Npacket_length/Cpadding_length', $this->_string_shift($raw, 5)));
|
|
|
2927 |
|
|
|
2928 |
$remaining_length = $packet_length + 4 - $this->decrypt_block_size;
|
|
|
2929 |
|
|
|
2930 |
// quoting <http://tools.ietf.org/html/rfc4253#section-6.1>,
|
|
|
2931 |
// "implementations SHOULD check that the packet length is reasonable"
|
|
|
2932 |
// PuTTY uses 0x9000 as the actual max packet size and so to shall we
|
|
|
2933 |
if ($remaining_length < -$this->decrypt_block_size || $remaining_length > 0x9000 || $remaining_length % $this->decrypt_block_size != 0) {
|
|
|
2934 |
user_error('Invalid size');
|
|
|
2935 |
return false;
|
|
|
2936 |
}
|
|
|
2937 |
|
|
|
2938 |
$buffer = '';
|
|
|
2939 |
while ($remaining_length > 0) {
|
|
|
2940 |
$temp = stream_get_contents($this->fsock, $remaining_length);
|
|
|
2941 |
if ($temp === false || feof($this->fsock)) {
|
|
|
2942 |
user_error('Error reading from socket');
|
|
|
2943 |
$this->bitmap = 0;
|
|
|
2944 |
return false;
|
|
|
2945 |
}
|
|
|
2946 |
$buffer.= $temp;
|
|
|
2947 |
$remaining_length-= strlen($temp);
|
|
|
2948 |
}
|
|
|
2949 |
$stop = microtime(true);
|
|
|
2950 |
if (strlen($buffer)) {
|
|
|
2951 |
$raw.= $this->decrypt !== false ? $this->decrypt->decrypt($buffer) : $buffer;
|
|
|
2952 |
}
|
|
|
2953 |
|
|
|
2954 |
$payload = $this->_string_shift($raw, $packet_length - $padding_length - 1);
|
|
|
2955 |
$padding = $this->_string_shift($raw, $padding_length); // should leave $raw empty
|
|
|
2956 |
|
|
|
2957 |
if ($this->hmac_check !== false) {
|
|
|
2958 |
$hmac = stream_get_contents($this->fsock, $this->hmac_size);
|
|
|
2959 |
if ($hmac === false || strlen($hmac) != $this->hmac_size) {
|
|
|
2960 |
user_error('Error reading socket');
|
|
|
2961 |
$this->bitmap = 0;
|
|
|
2962 |
return false;
|
|
|
2963 |
} elseif ($hmac != $this->hmac_check->hash(pack('NNCa*', $this->get_seq_no, $packet_length, $padding_length, $payload . $padding))) {
|
|
|
2964 |
user_error('Invalid HMAC');
|
|
|
2965 |
return false;
|
|
|
2966 |
}
|
|
|
2967 |
}
|
|
|
2968 |
|
|
|
2969 |
//if ($this->decompress) {
|
|
|
2970 |
// $payload = gzinflate(substr($payload, 2));
|
|
|
2971 |
//}
|
|
|
2972 |
|
|
|
2973 |
$this->get_seq_no++;
|
|
|
2974 |
|
|
|
2975 |
if (defined('NET_SSH2_LOGGING')) {
|
|
|
2976 |
$current = microtime(true);
|
|
|
2977 |
$message_number = isset($this->message_numbers[ord($payload[0])]) ? $this->message_numbers[ord($payload[0])] : 'UNKNOWN (' . ord($payload[0]) . ')';
|
|
|
2978 |
$message_number = '<- ' . $message_number .
|
|
|
2979 |
' (since last: ' . round($current - $this->last_packet, 4) . ', network: ' . round($stop - $start, 4) . 's)';
|
|
|
2980 |
$this->_append_log($message_number, $payload);
|
|
|
2981 |
$this->last_packet = $current;
|
|
|
2982 |
}
|
|
|
2983 |
|
|
|
2984 |
return $this->_filter($payload);
|
|
|
2985 |
}
|
|
|
2986 |
|
|
|
2987 |
/**
|
|
|
2988 |
* Filter Binary Packets
|
|
|
2989 |
*
|
|
|
2990 |
* Because some binary packets need to be ignored...
|
|
|
2991 |
*
|
|
|
2992 |
* @see self::_get_binary_packet()
|
|
|
2993 |
* @return string
|
|
|
2994 |
* @access private
|
|
|
2995 |
*/
|
|
|
2996 |
function _filter($payload)
|
|
|
2997 |
{
|
|
|
2998 |
switch (ord($payload[0])) {
|
|
|
2999 |
case NET_SSH2_MSG_DISCONNECT:
|
|
|
3000 |
$this->_string_shift($payload, 1);
|
|
|
3001 |
extract(unpack('Nreason_code/Nlength', $this->_string_shift($payload, 8)));
|
|
|
3002 |
$this->errors[] = 'SSH_MSG_DISCONNECT: ' . $this->disconnect_reasons[$reason_code] . "\r\n" . utf8_decode($this->_string_shift($payload, $length));
|
|
|
3003 |
$this->bitmap = 0;
|
|
|
3004 |
return false;
|
|
|
3005 |
case NET_SSH2_MSG_IGNORE:
|
|
|
3006 |
$payload = $this->_get_binary_packet();
|
|
|
3007 |
break;
|
|
|
3008 |
case NET_SSH2_MSG_DEBUG:
|
|
|
3009 |
$this->_string_shift($payload, 2);
|
|
|
3010 |
extract(unpack('Nlength', $this->_string_shift($payload, 4)));
|
|
|
3011 |
$this->errors[] = 'SSH_MSG_DEBUG: ' . utf8_decode($this->_string_shift($payload, $length));
|
|
|
3012 |
$payload = $this->_get_binary_packet();
|
|
|
3013 |
break;
|
|
|
3014 |
case NET_SSH2_MSG_UNIMPLEMENTED:
|
|
|
3015 |
return false;
|
|
|
3016 |
case NET_SSH2_MSG_KEXINIT:
|
|
|
3017 |
if ($this->session_id !== false) {
|
|
|
3018 |
if (!$this->_key_exchange($payload)) {
|
|
|
3019 |
$this->bitmap = 0;
|
|
|
3020 |
return false;
|
|
|
3021 |
}
|
|
|
3022 |
$payload = $this->_get_binary_packet();
|
|
|
3023 |
}
|
|
|
3024 |
}
|
|
|
3025 |
|
|
|
3026 |
// see http://tools.ietf.org/html/rfc4252#section-5.4; only called when the encryption has been activated and when we haven't already logged in
|
|
|
3027 |
if (($this->bitmap & self::MASK_CONNECTED) && !($this->bitmap & self::MASK_LOGIN) && ord($payload[0]) == NET_SSH2_MSG_USERAUTH_BANNER) {
|
|
|
3028 |
$this->_string_shift($payload, 1);
|
|
|
3029 |
extract(unpack('Nlength', $this->_string_shift($payload, 4)));
|
|
|
3030 |
$this->banner_message = utf8_decode($this->_string_shift($payload, $length));
|
|
|
3031 |
$payload = $this->_get_binary_packet();
|
|
|
3032 |
}
|
|
|
3033 |
|
|
|
3034 |
// only called when we've already logged in
|
|
|
3035 |
if (($this->bitmap & self::MASK_CONNECTED) && ($this->bitmap & self::MASK_LOGIN)) {
|
|
|
3036 |
switch (ord($payload[0])) {
|
|
|
3037 |
case NET_SSH2_MSG_GLOBAL_REQUEST: // see http://tools.ietf.org/html/rfc4254#section-4
|
|
|
3038 |
extract(unpack('Nlength', $this->_string_shift($payload, 4)));
|
|
|
3039 |
$this->errors[] = 'SSH_MSG_GLOBAL_REQUEST: ' . $this->_string_shift($payload, $length);
|
|
|
3040 |
|
|
|
3041 |
if (!$this->_send_binary_packet(pack('C', NET_SSH2_MSG_REQUEST_FAILURE))) {
|
|
|
3042 |
return $this->_disconnect(NET_SSH2_DISCONNECT_BY_APPLICATION);
|
|
|
3043 |
}
|
|
|
3044 |
|
|
|
3045 |
$payload = $this->_get_binary_packet();
|
|
|
3046 |
break;
|
|
|
3047 |
case NET_SSH2_MSG_CHANNEL_OPEN: // see http://tools.ietf.org/html/rfc4254#section-5.1
|
|
|
3048 |
$this->_string_shift($payload, 1);
|
|
|
3049 |
extract(unpack('Nlength', $this->_string_shift($payload, 4)));
|
|
|
3050 |
$data = $this->_string_shift($payload, $length);
|
|
|
3051 |
extract(unpack('Nserver_channel', $this->_string_shift($payload, 4)));
|
|
|
3052 |
switch ($data) {
|
|
|
3053 |
case 'auth-agent':
|
|
|
3054 |
case 'auth-agent@openssh.com':
|
|
|
3055 |
if (isset($this->agent)) {
|
|
|
3056 |
$new_channel = self::CHANNEL_AGENT_FORWARD;
|
|
|
3057 |
|
|
|
3058 |
extract(unpack('Nremote_window_size', $this->_string_shift($payload, 4)));
|
|
|
3059 |
extract(unpack('Nremote_maximum_packet_size', $this->_string_shift($payload, 4)));
|
|
|
3060 |
|
|
|
3061 |
$this->packet_size_client_to_server[$new_channel] = $remote_window_size;
|
|
|
3062 |
$this->window_size_server_to_client[$new_channel] = $remote_maximum_packet_size;
|
|
|
3063 |
$this->window_size_client_to_server[$new_channel] = $this->window_size;
|
|
|
3064 |
|
|
|
3065 |
$packet_size = 0x4000;
|
|
|
3066 |
|
|
|
3067 |
$packet = pack(
|
|
|
3068 |
'CN4',
|
|
|
3069 |
NET_SSH2_MSG_CHANNEL_OPEN_CONFIRMATION,
|
|
|
3070 |
$server_channel,
|
|
|
3071 |
$new_channel,
|
|
|
3072 |
$packet_size,
|
|
|
3073 |
$packet_size
|
|
|
3074 |
);
|
|
|
3075 |
|
|
|
3076 |
$this->server_channels[$new_channel] = $server_channel;
|
|
|
3077 |
$this->channel_status[$new_channel] = NET_SSH2_MSG_CHANNEL_OPEN_CONFIRMATION;
|
|
|
3078 |
if (!$this->_send_binary_packet($packet)) {
|
|
|
3079 |
return false;
|
|
|
3080 |
}
|
|
|
3081 |
}
|
|
|
3082 |
break;
|
|
|
3083 |
default:
|
|
|
3084 |
$packet = pack(
|
|
|
3085 |
'CN3a*Na*',
|
|
|
3086 |
NET_SSH2_MSG_REQUEST_FAILURE,
|
|
|
3087 |
$server_channel,
|
|
|
3088 |
NET_SSH2_OPEN_ADMINISTRATIVELY_PROHIBITED,
|
|
|
3089 |
0,
|
|
|
3090 |
'',
|
|
|
3091 |
0,
|
|
|
3092 |
''
|
|
|
3093 |
);
|
|
|
3094 |
|
|
|
3095 |
if (!$this->_send_binary_packet($packet)) {
|
|
|
3096 |
return $this->_disconnect(NET_SSH2_DISCONNECT_BY_APPLICATION);
|
|
|
3097 |
}
|
|
|
3098 |
}
|
|
|
3099 |
$payload = $this->_get_binary_packet();
|
|
|
3100 |
break;
|
|
|
3101 |
case NET_SSH2_MSG_CHANNEL_WINDOW_ADJUST:
|
|
|
3102 |
$this->_string_shift($payload, 1);
|
|
|
3103 |
extract(unpack('Nchannel', $this->_string_shift($payload, 4)));
|
|
|
3104 |
extract(unpack('Nwindow_size', $this->_string_shift($payload, 4)));
|
|
|
3105 |
$this->window_size_client_to_server[$channel]+= $window_size;
|
|
|
3106 |
|
|
|
3107 |
$payload = ($this->bitmap & self::MASK_WINDOW_ADJUST) ? true : $this->_get_binary_packet();
|
|
|
3108 |
}
|
|
|
3109 |
}
|
|
|
3110 |
|
|
|
3111 |
return $payload;
|
|
|
3112 |
}
|
|
|
3113 |
|
|
|
3114 |
/**
|
|
|
3115 |
* Enable Quiet Mode
|
|
|
3116 |
*
|
|
|
3117 |
* Suppress stderr from output
|
|
|
3118 |
*
|
|
|
3119 |
* @access public
|
|
|
3120 |
*/
|
|
|
3121 |
function enableQuietMode()
|
|
|
3122 |
{
|
|
|
3123 |
$this->quiet_mode = true;
|
|
|
3124 |
}
|
|
|
3125 |
|
|
|
3126 |
/**
|
|
|
3127 |
* Disable Quiet Mode
|
|
|
3128 |
*
|
|
|
3129 |
* Show stderr in output
|
|
|
3130 |
*
|
|
|
3131 |
* @access public
|
|
|
3132 |
*/
|
|
|
3133 |
function disableQuietMode()
|
|
|
3134 |
{
|
|
|
3135 |
$this->quiet_mode = false;
|
|
|
3136 |
}
|
|
|
3137 |
|
|
|
3138 |
/**
|
|
|
3139 |
* Returns whether Quiet Mode is enabled or not
|
|
|
3140 |
*
|
|
|
3141 |
* @see self::enableQuietMode()
|
|
|
3142 |
* @see self::disableQuietMode()
|
|
|
3143 |
* @access public
|
|
|
3144 |
* @return bool
|
|
|
3145 |
*/
|
|
|
3146 |
function isQuietModeEnabled()
|
|
|
3147 |
{
|
|
|
3148 |
return $this->quiet_mode;
|
|
|
3149 |
}
|
|
|
3150 |
|
|
|
3151 |
/**
|
|
|
3152 |
* Enable request-pty when using exec()
|
|
|
3153 |
*
|
|
|
3154 |
* @access public
|
|
|
3155 |
*/
|
|
|
3156 |
function enablePTY()
|
|
|
3157 |
{
|
|
|
3158 |
$this->request_pty = true;
|
|
|
3159 |
}
|
|
|
3160 |
|
|
|
3161 |
/**
|
|
|
3162 |
* Disable request-pty when using exec()
|
|
|
3163 |
*
|
|
|
3164 |
* @access public
|
|
|
3165 |
*/
|
|
|
3166 |
function disablePTY()
|
|
|
3167 |
{
|
|
|
3168 |
$this->request_pty = false;
|
|
|
3169 |
}
|
|
|
3170 |
|
|
|
3171 |
/**
|
|
|
3172 |
* Returns whether request-pty is enabled or not
|
|
|
3173 |
*
|
|
|
3174 |
* @see self::enablePTY()
|
|
|
3175 |
* @see self::disablePTY()
|
|
|
3176 |
* @access public
|
|
|
3177 |
* @return bool
|
|
|
3178 |
*/
|
|
|
3179 |
function isPTYEnabled()
|
|
|
3180 |
{
|
|
|
3181 |
return $this->request_pty;
|
|
|
3182 |
}
|
|
|
3183 |
|
|
|
3184 |
/**
|
|
|
3185 |
* Gets channel data
|
|
|
3186 |
*
|
|
|
3187 |
* Returns the data as a string if it's available and false if not.
|
|
|
3188 |
*
|
|
|
3189 |
* @param $client_channel
|
|
|
3190 |
* @return mixed
|
|
|
3191 |
* @access private
|
|
|
3192 |
*/
|
|
|
3193 |
function _get_channel_packet($client_channel, $skip_extended = false)
|
|
|
3194 |
{
|
|
|
3195 |
if (!empty($this->channel_buffers[$client_channel])) {
|
|
|
3196 |
return array_shift($this->channel_buffers[$client_channel]);
|
|
|
3197 |
}
|
|
|
3198 |
|
|
|
3199 |
while (true) {
|
|
|
3200 |
if ($this->curTimeout) {
|
|
|
3201 |
if ($this->curTimeout < 0) {
|
|
|
3202 |
$this->is_timeout = true;
|
|
|
3203 |
return true;
|
|
|
3204 |
}
|
|
|
3205 |
|
|
|
3206 |
$read = array($this->fsock);
|
|
|
3207 |
$write = $except = null;
|
|
|
3208 |
|
|
|
3209 |
$start = microtime(true);
|
|
|
3210 |
$sec = floor($this->curTimeout);
|
|
|
3211 |
$usec = 1000000 * ($this->curTimeout - $sec);
|
|
|
3212 |
// on windows this returns a "Warning: Invalid CRT parameters detected" error
|
|
|
3213 |
if (!@stream_select($read, $write, $except, $sec, $usec) && !count($read)) {
|
|
|
3214 |
$this->is_timeout = true;
|
|
|
3215 |
return true;
|
|
|
3216 |
}
|
|
|
3217 |
$elapsed = microtime(true) - $start;
|
|
|
3218 |
$this->curTimeout-= $elapsed;
|
|
|
3219 |
}
|
|
|
3220 |
|
|
|
3221 |
$response = $this->_get_binary_packet();
|
|
|
3222 |
if ($response === false) {
|
|
|
3223 |
user_error('Connection closed by server');
|
|
|
3224 |
return false;
|
|
|
3225 |
}
|
|
|
3226 |
if ($client_channel == -1 && $response === true) {
|
|
|
3227 |
return true;
|
|
|
3228 |
}
|
|
|
3229 |
if (!strlen($response)) {
|
|
|
3230 |
return '';
|
|
|
3231 |
}
|
|
|
3232 |
|
|
|
3233 |
extract(unpack('Ctype', $this->_string_shift($response, 1)));
|
|
|
3234 |
|
|
|
3235 |
if ($type == NET_SSH2_MSG_CHANNEL_OPEN) {
|
|
|
3236 |
extract(unpack('Nlength', $this->_string_shift($response, 4)));
|
|
|
3237 |
} else {
|
|
|
3238 |
extract(unpack('Nchannel', $this->_string_shift($response, 4)));
|
|
|
3239 |
}
|
|
|
3240 |
|
|
|
3241 |
// will not be setup yet on incoming channel open request
|
|
|
3242 |
if (isset($channel) && isset($this->channel_status[$channel]) && isset($this->window_size_server_to_client[$channel])) {
|
|
|
3243 |
$this->window_size_server_to_client[$channel]-= strlen($response);
|
|
|
3244 |
|
|
|
3245 |
// resize the window, if appropriate
|
|
|
3246 |
if ($this->window_size_server_to_client[$channel] < 0) {
|
|
|
3247 |
$packet = pack('CNN', NET_SSH2_MSG_CHANNEL_WINDOW_ADJUST, $this->server_channels[$channel], $this->window_size);
|
|
|
3248 |
if (!$this->_send_binary_packet($packet)) {
|
|
|
3249 |
return false;
|
|
|
3250 |
}
|
|
|
3251 |
$this->window_size_server_to_client[$channel]+= $this->window_size;
|
|
|
3252 |
}
|
|
|
3253 |
|
|
|
3254 |
switch ($this->channel_status[$channel]) {
|
|
|
3255 |
case NET_SSH2_MSG_CHANNEL_OPEN:
|
|
|
3256 |
switch ($type) {
|
|
|
3257 |
case NET_SSH2_MSG_CHANNEL_OPEN_CONFIRMATION:
|
|
|
3258 |
extract(unpack('Nserver_channel', $this->_string_shift($response, 4)));
|
|
|
3259 |
$this->server_channels[$channel] = $server_channel;
|
|
|
3260 |
extract(unpack('Nwindow_size', $this->_string_shift($response, 4)));
|
|
|
3261 |
if ($window_size < 0) {
|
|
|
3262 |
$window_size&= 0x7FFFFFFF;
|
|
|
3263 |
$window_size+= 0x80000000;
|
|
|
3264 |
}
|
|
|
3265 |
$this->window_size_client_to_server[$channel] = $window_size;
|
|
|
3266 |
$temp = unpack('Npacket_size_client_to_server', $this->_string_shift($response, 4));
|
|
|
3267 |
$this->packet_size_client_to_server[$channel] = $temp['packet_size_client_to_server'];
|
|
|
3268 |
$result = $client_channel == $channel ? true : $this->_get_channel_packet($client_channel, $skip_extended);
|
|
|
3269 |
$this->_on_channel_open();
|
|
|
3270 |
return $result;
|
|
|
3271 |
//case NET_SSH2_MSG_CHANNEL_OPEN_FAILURE:
|
|
|
3272 |
default:
|
|
|
3273 |
user_error('Unable to open channel');
|
|
|
3274 |
return $this->_disconnect(NET_SSH2_DISCONNECT_BY_APPLICATION);
|
|
|
3275 |
}
|
|
|
3276 |
break;
|
|
|
3277 |
case NET_SSH2_MSG_CHANNEL_REQUEST:
|
|
|
3278 |
switch ($type) {
|
|
|
3279 |
case NET_SSH2_MSG_CHANNEL_SUCCESS:
|
|
|
3280 |
return true;
|
|
|
3281 |
case NET_SSH2_MSG_CHANNEL_FAILURE:
|
|
|
3282 |
return false;
|
|
|
3283 |
default:
|
|
|
3284 |
user_error('Unable to fulfill channel request');
|
|
|
3285 |
return $this->_disconnect(NET_SSH2_DISCONNECT_BY_APPLICATION);
|
|
|
3286 |
}
|
|
|
3287 |
case NET_SSH2_MSG_CHANNEL_CLOSE:
|
|
|
3288 |
return $type == NET_SSH2_MSG_CHANNEL_CLOSE ? true : $this->_get_channel_packet($client_channel, $skip_extended);
|
|
|
3289 |
}
|
|
|
3290 |
}
|
|
|
3291 |
|
|
|
3292 |
// ie. $this->channel_status[$channel] == NET_SSH2_MSG_CHANNEL_DATA
|
|
|
3293 |
|
|
|
3294 |
switch ($type) {
|
|
|
3295 |
case NET_SSH2_MSG_CHANNEL_DATA:
|
|
|
3296 |
/*
|
|
|
3297 |
if ($channel == self::CHANNEL_EXEC) {
|
|
|
3298 |
// SCP requires null packets, such as this, be sent. further, in the case of the ssh.com SSH server
|
|
|
3299 |
// this actually seems to make things twice as fast. more to the point, the message right after
|
|
|
3300 |
// SSH_MSG_CHANNEL_DATA (usually SSH_MSG_IGNORE) won't block for as long as it would have otherwise.
|
|
|
3301 |
// in OpenSSH it slows things down but only by a couple thousandths of a second.
|
|
|
3302 |
$this->_send_channel_packet($channel, chr(0));
|
|
|
3303 |
}
|
|
|
3304 |
*/
|
|
|
3305 |
extract(unpack('Nlength', $this->_string_shift($response, 4)));
|
|
|
3306 |
$data = $this->_string_shift($response, $length);
|
|
|
3307 |
|
|
|
3308 |
if ($channel == self::CHANNEL_AGENT_FORWARD) {
|
|
|
3309 |
$agent_response = $this->agent->_forward_data($data);
|
|
|
3310 |
if (!is_bool($agent_response)) {
|
|
|
3311 |
$this->_send_channel_packet($channel, $agent_response);
|
|
|
3312 |
}
|
|
|
3313 |
break;
|
|
|
3314 |
}
|
|
|
3315 |
|
|
|
3316 |
if ($client_channel == $channel) {
|
|
|
3317 |
return $data;
|
|
|
3318 |
}
|
|
|
3319 |
if (!isset($this->channel_buffers[$channel])) {
|
|
|
3320 |
$this->channel_buffers[$channel] = array();
|
|
|
3321 |
}
|
|
|
3322 |
$this->channel_buffers[$channel][] = $data;
|
|
|
3323 |
break;
|
|
|
3324 |
case NET_SSH2_MSG_CHANNEL_EXTENDED_DATA:
|
|
|
3325 |
/*
|
|
|
3326 |
if ($client_channel == self::CHANNEL_EXEC) {
|
|
|
3327 |
$this->_send_channel_packet($client_channel, chr(0));
|
|
|
3328 |
}
|
|
|
3329 |
*/
|
|
|
3330 |
// currently, there's only one possible value for $data_type_code: NET_SSH2_EXTENDED_DATA_STDERR
|
|
|
3331 |
extract(unpack('Ndata_type_code/Nlength', $this->_string_shift($response, 8)));
|
|
|
3332 |
$data = $this->_string_shift($response, $length);
|
|
|
3333 |
$this->stdErrorLog.= $data;
|
|
|
3334 |
if ($skip_extended || $this->quiet_mode) {
|
|
|
3335 |
break;
|
|
|
3336 |
}
|
|
|
3337 |
if ($client_channel == $channel) {
|
|
|
3338 |
return $data;
|
|
|
3339 |
}
|
|
|
3340 |
if (!isset($this->channel_buffers[$channel])) {
|
|
|
3341 |
$this->channel_buffers[$channel] = array();
|
|
|
3342 |
}
|
|
|
3343 |
$this->channel_buffers[$channel][] = $data;
|
|
|
3344 |
break;
|
|
|
3345 |
case NET_SSH2_MSG_CHANNEL_REQUEST:
|
|
|
3346 |
extract(unpack('Nlength', $this->_string_shift($response, 4)));
|
|
|
3347 |
$value = $this->_string_shift($response, $length);
|
|
|
3348 |
switch ($value) {
|
|
|
3349 |
case 'exit-signal':
|
|
|
3350 |
$this->_string_shift($response, 1);
|
|
|
3351 |
extract(unpack('Nlength', $this->_string_shift($response, 4)));
|
|
|
3352 |
$this->errors[] = 'SSH_MSG_CHANNEL_REQUEST (exit-signal): ' . $this->_string_shift($response, $length);
|
|
|
3353 |
$this->_string_shift($response, 1);
|
|
|
3354 |
extract(unpack('Nlength', $this->_string_shift($response, 4)));
|
|
|
3355 |
if ($length) {
|
|
|
3356 |
$this->errors[count($this->errors)].= "\r\n" . $this->_string_shift($response, $length);
|
|
|
3357 |
}
|
|
|
3358 |
|
|
|
3359 |
$this->_send_binary_packet(pack('CN', NET_SSH2_MSG_CHANNEL_EOF, $this->server_channels[$client_channel]));
|
|
|
3360 |
$this->_send_binary_packet(pack('CN', NET_SSH2_MSG_CHANNEL_CLOSE, $this->server_channels[$channel]));
|
|
|
3361 |
|
|
|
3362 |
$this->channel_status[$channel] = NET_SSH2_MSG_CHANNEL_EOF;
|
|
|
3363 |
|
|
|
3364 |
break;
|
|
|
3365 |
case 'exit-status':
|
|
|
3366 |
extract(unpack('Cfalse/Nexit_status', $this->_string_shift($response, 5)));
|
|
|
3367 |
$this->exit_status = $exit_status;
|
|
|
3368 |
|
|
|
3369 |
// "The client MAY ignore these messages."
|
|
|
3370 |
// -- http://tools.ietf.org/html/rfc4254#section-6.10
|
|
|
3371 |
|
|
|
3372 |
break;
|
|
|
3373 |
default:
|
|
|
3374 |
// "Some systems may not implement signals, in which case they SHOULD ignore this message."
|
|
|
3375 |
// -- http://tools.ietf.org/html/rfc4254#section-6.9
|
|
|
3376 |
break;
|
|
|
3377 |
}
|
|
|
3378 |
break;
|
|
|
3379 |
case NET_SSH2_MSG_CHANNEL_CLOSE:
|
|
|
3380 |
$this->curTimeout = 0;
|
|
|
3381 |
|
|
|
3382 |
if ($this->bitmap & self::MASK_SHELL) {
|
|
|
3383 |
$this->bitmap&= ~self::MASK_SHELL;
|
|
|
3384 |
}
|
|
|
3385 |
if ($this->channel_status[$channel] != NET_SSH2_MSG_CHANNEL_EOF) {
|
|
|
3386 |
$this->_send_binary_packet(pack('CN', NET_SSH2_MSG_CHANNEL_CLOSE, $this->server_channels[$channel]));
|
|
|
3387 |
}
|
|
|
3388 |
|
|
|
3389 |
$this->channel_status[$channel] = NET_SSH2_MSG_CHANNEL_CLOSE;
|
|
|
3390 |
if ($client_channel == $channel) {
|
|
|
3391 |
return true;
|
|
|
3392 |
}
|
|
|
3393 |
case NET_SSH2_MSG_CHANNEL_EOF:
|
|
|
3394 |
break;
|
|
|
3395 |
default:
|
|
|
3396 |
user_error('Error reading channel data');
|
|
|
3397 |
return $this->_disconnect(NET_SSH2_DISCONNECT_BY_APPLICATION);
|
|
|
3398 |
}
|
|
|
3399 |
}
|
|
|
3400 |
}
|
|
|
3401 |
|
|
|
3402 |
/**
|
|
|
3403 |
* Sends Binary Packets
|
|
|
3404 |
*
|
|
|
3405 |
* See '6. Binary Packet Protocol' of rfc4253 for more info.
|
|
|
3406 |
*
|
|
|
3407 |
* @param string $data
|
|
|
3408 |
* @param string $logged
|
|
|
3409 |
* @see self::_get_binary_packet()
|
|
|
3410 |
* @return bool
|
|
|
3411 |
* @access private
|
|
|
3412 |
*/
|
|
|
3413 |
function _send_binary_packet($data, $logged = null)
|
|
|
3414 |
{
|
|
|
3415 |
if (!is_resource($this->fsock) || feof($this->fsock)) {
|
|
|
3416 |
user_error('Connection closed prematurely');
|
|
|
3417 |
$this->bitmap = 0;
|
|
|
3418 |
return false;
|
|
|
3419 |
}
|
|
|
3420 |
|
|
|
3421 |
//if ($this->compress) {
|
|
|
3422 |
// // the -4 removes the checksum:
|
|
|
3423 |
// // http://php.net/function.gzcompress#57710
|
|
|
3424 |
// $data = substr(gzcompress($data), 0, -4);
|
|
|
3425 |
//}
|
|
|
3426 |
|
|
|
3427 |
// 4 (packet length) + 1 (padding length) + 4 (minimal padding amount) == 9
|
|
|
3428 |
$packet_length = strlen($data) + 9;
|
|
|
3429 |
// round up to the nearest $this->encrypt_block_size
|
|
|
3430 |
$packet_length+= (($this->encrypt_block_size - 1) * $packet_length) % $this->encrypt_block_size;
|
|
|
3431 |
// subtracting strlen($data) is obvious - subtracting 5 is necessary because of packet_length and padding_length
|
|
|
3432 |
$padding_length = $packet_length - strlen($data) - 5;
|
|
|
3433 |
$padding = Random::string($padding_length);
|
|
|
3434 |
|
|
|
3435 |
// we subtract 4 from packet_length because the packet_length field isn't supposed to include itself
|
|
|
3436 |
$packet = pack('NCa*', $packet_length - 4, $padding_length, $data . $padding);
|
|
|
3437 |
|
|
|
3438 |
$hmac = $this->hmac_create !== false ? $this->hmac_create->hash(pack('Na*', $this->send_seq_no, $packet)) : '';
|
|
|
3439 |
$this->send_seq_no++;
|
|
|
3440 |
|
|
|
3441 |
if ($this->encrypt !== false) {
|
|
|
3442 |
$packet = $this->encrypt->encrypt($packet);
|
|
|
3443 |
}
|
|
|
3444 |
|
|
|
3445 |
$packet.= $hmac;
|
|
|
3446 |
|
|
|
3447 |
$start = microtime(true);
|
|
|
3448 |
$result = strlen($packet) == fputs($this->fsock, $packet);
|
|
|
3449 |
$stop = microtime(true);
|
|
|
3450 |
|
|
|
3451 |
if (defined('NET_SSH2_LOGGING')) {
|
|
|
3452 |
$current = microtime(true);
|
|
|
3453 |
$message_number = isset($this->message_numbers[ord($data[0])]) ? $this->message_numbers[ord($data[0])] : 'UNKNOWN (' . ord($data[0]) . ')';
|
|
|
3454 |
$message_number = '-> ' . $message_number .
|
|
|
3455 |
' (since last: ' . round($current - $this->last_packet, 4) . ', network: ' . round($stop - $start, 4) . 's)';
|
|
|
3456 |
$this->_append_log($message_number, isset($logged) ? $logged : $data);
|
|
|
3457 |
$this->last_packet = $current;
|
|
|
3458 |
}
|
|
|
3459 |
|
|
|
3460 |
return $result;
|
|
|
3461 |
}
|
|
|
3462 |
|
|
|
3463 |
/**
|
|
|
3464 |
* Logs data packets
|
|
|
3465 |
*
|
|
|
3466 |
* Makes sure that only the last 1MB worth of packets will be logged
|
|
|
3467 |
*
|
|
|
3468 |
* @param string $data
|
|
|
3469 |
* @access private
|
|
|
3470 |
*/
|
|
|
3471 |
function _append_log($message_number, $message)
|
|
|
3472 |
{
|
|
|
3473 |
// remove the byte identifying the message type from all but the first two messages (ie. the identification strings)
|
|
|
3474 |
if (strlen($message_number) > 2) {
|
|
|
3475 |
$this->_string_shift($message);
|
|
|
3476 |
}
|
|
|
3477 |
|
|
|
3478 |
switch (NET_SSH2_LOGGING) {
|
|
|
3479 |
// useful for benchmarks
|
|
|
3480 |
case self::LOG_SIMPLE:
|
|
|
3481 |
$this->message_number_log[] = $message_number;
|
|
|
3482 |
break;
|
|
|
3483 |
// the most useful log for SSH2
|
|
|
3484 |
case self::LOG_COMPLEX:
|
|
|
3485 |
$this->message_number_log[] = $message_number;
|
|
|
3486 |
$this->log_size+= strlen($message);
|
|
|
3487 |
$this->message_log[] = $message;
|
|
|
3488 |
while ($this->log_size > self::LOG_MAX_SIZE) {
|
|
|
3489 |
$this->log_size-= strlen(array_shift($this->message_log));
|
|
|
3490 |
array_shift($this->message_number_log);
|
|
|
3491 |
}
|
|
|
3492 |
break;
|
|
|
3493 |
// dump the output out realtime; packets may be interspersed with non packets,
|
|
|
3494 |
// passwords won't be filtered out and select other packets may not be correctly
|
|
|
3495 |
// identified
|
|
|
3496 |
case self::LOG_REALTIME:
|
|
|
3497 |
switch (PHP_SAPI) {
|
|
|
3498 |
case 'cli':
|
|
|
3499 |
$start = $stop = "\r\n";
|
|
|
3500 |
break;
|
|
|
3501 |
default:
|
|
|
3502 |
$start = '<pre>';
|
|
|
3503 |
$stop = '</pre>';
|
|
|
3504 |
}
|
|
|
3505 |
echo $start . $this->_format_log(array($message), array($message_number)) . $stop;
|
|
|
3506 |
@flush();
|
|
|
3507 |
@ob_flush();
|
|
|
3508 |
break;
|
|
|
3509 |
// basically the same thing as self::LOG_REALTIME with the caveat that self::LOG_REALTIME_FILE
|
|
|
3510 |
// needs to be defined and that the resultant log file will be capped out at self::LOG_MAX_SIZE.
|
|
|
3511 |
// the earliest part of the log file is denoted by the first <<< START >>> and is not going to necessarily
|
|
|
3512 |
// at the beginning of the file
|
|
|
3513 |
case self::LOG_REALTIME_FILE:
|
|
|
3514 |
if (!isset($this->realtime_log_file)) {
|
|
|
3515 |
// PHP doesn't seem to like using constants in fopen()
|
|
|
3516 |
$filename = self::LOG_REALTIME_FILENAME;
|
|
|
3517 |
$fp = fopen($filename, 'w');
|
|
|
3518 |
$this->realtime_log_file = $fp;
|
|
|
3519 |
}
|
|
|
3520 |
if (!is_resource($this->realtime_log_file)) {
|
|
|
3521 |
break;
|
|
|
3522 |
}
|
|
|
3523 |
$entry = $this->_format_log(array($message), array($message_number));
|
|
|
3524 |
if ($this->realtime_log_wrap) {
|
|
|
3525 |
$temp = "<<< START >>>\r\n";
|
|
|
3526 |
$entry.= $temp;
|
|
|
3527 |
fseek($this->realtime_log_file, ftell($this->realtime_log_file) - strlen($temp));
|
|
|
3528 |
}
|
|
|
3529 |
$this->realtime_log_size+= strlen($entry);
|
|
|
3530 |
if ($this->realtime_log_size > self::LOG_MAX_SIZE) {
|
|
|
3531 |
fseek($this->realtime_log_file, 0);
|
|
|
3532 |
$this->realtime_log_size = strlen($entry);
|
|
|
3533 |
$this->realtime_log_wrap = true;
|
|
|
3534 |
}
|
|
|
3535 |
fputs($this->realtime_log_file, $entry);
|
|
|
3536 |
}
|
|
|
3537 |
}
|
|
|
3538 |
|
|
|
3539 |
/**
|
|
|
3540 |
* Sends channel data
|
|
|
3541 |
*
|
|
|
3542 |
* Spans multiple SSH_MSG_CHANNEL_DATAs if appropriate
|
|
|
3543 |
*
|
|
|
3544 |
* @param int $client_channel
|
|
|
3545 |
* @param string $data
|
|
|
3546 |
* @return bool
|
|
|
3547 |
* @access private
|
|
|
3548 |
*/
|
|
|
3549 |
function _send_channel_packet($client_channel, $data)
|
|
|
3550 |
{
|
|
|
3551 |
while (strlen($data)) {
|
|
|
3552 |
if (!$this->window_size_client_to_server[$client_channel]) {
|
|
|
3553 |
$this->bitmap^= self::MASK_WINDOW_ADJUST;
|
|
|
3554 |
// using an invalid channel will let the buffers be built up for the valid channels
|
|
|
3555 |
$this->_get_channel_packet(-1);
|
|
|
3556 |
$this->bitmap^= self::MASK_WINDOW_ADJUST;
|
|
|
3557 |
}
|
|
|
3558 |
|
|
|
3559 |
/* The maximum amount of data allowed is determined by the maximum
|
|
|
3560 |
packet size for the channel, and the current window size, whichever
|
|
|
3561 |
is smaller.
|
|
|
3562 |
-- http://tools.ietf.org/html/rfc4254#section-5.2 */
|
|
|
3563 |
$max_size = min(
|
|
|
3564 |
$this->packet_size_client_to_server[$client_channel],
|
|
|
3565 |
$this->window_size_client_to_server[$client_channel]
|
|
|
3566 |
);
|
|
|
3567 |
|
|
|
3568 |
$temp = $this->_string_shift($data, $max_size);
|
|
|
3569 |
$packet = pack(
|
|
|
3570 |
'CN2a*',
|
|
|
3571 |
NET_SSH2_MSG_CHANNEL_DATA,
|
|
|
3572 |
$this->server_channels[$client_channel],
|
|
|
3573 |
strlen($temp),
|
|
|
3574 |
$temp
|
|
|
3575 |
);
|
|
|
3576 |
$this->window_size_client_to_server[$client_channel]-= strlen($temp);
|
|
|
3577 |
if (!$this->_send_binary_packet($packet)) {
|
|
|
3578 |
return false;
|
|
|
3579 |
}
|
|
|
3580 |
}
|
|
|
3581 |
|
|
|
3582 |
return true;
|
|
|
3583 |
}
|
|
|
3584 |
|
|
|
3585 |
/**
|
|
|
3586 |
* Closes and flushes a channel
|
|
|
3587 |
*
|
|
|
3588 |
* \phpseclib\Net\SSH2 doesn't properly close most channels. For exec() channels are normally closed by the server
|
|
|
3589 |
* and for SFTP channels are presumably closed when the client disconnects. This functions is intended
|
|
|
3590 |
* for SCP more than anything.
|
|
|
3591 |
*
|
|
|
3592 |
* @param int $client_channel
|
|
|
3593 |
* @param bool $want_reply
|
|
|
3594 |
* @return bool
|
|
|
3595 |
* @access private
|
|
|
3596 |
*/
|
|
|
3597 |
function _close_channel($client_channel, $want_reply = false)
|
|
|
3598 |
{
|
|
|
3599 |
// see http://tools.ietf.org/html/rfc4254#section-5.3
|
|
|
3600 |
|
|
|
3601 |
$this->_send_binary_packet(pack('CN', NET_SSH2_MSG_CHANNEL_EOF, $this->server_channels[$client_channel]));
|
|
|
3602 |
|
|
|
3603 |
if (!$want_reply) {
|
|
|
3604 |
$this->_send_binary_packet(pack('CN', NET_SSH2_MSG_CHANNEL_CLOSE, $this->server_channels[$client_channel]));
|
|
|
3605 |
}
|
|
|
3606 |
|
|
|
3607 |
$this->channel_status[$client_channel] = NET_SSH2_MSG_CHANNEL_CLOSE;
|
|
|
3608 |
|
|
|
3609 |
$this->curTimeout = 0;
|
|
|
3610 |
|
|
|
3611 |
while (!is_bool($this->_get_channel_packet($client_channel))) {
|
|
|
3612 |
}
|
|
|
3613 |
|
|
|
3614 |
if ($want_reply) {
|
|
|
3615 |
$this->_send_binary_packet(pack('CN', NET_SSH2_MSG_CHANNEL_CLOSE, $this->server_channels[$client_channel]));
|
|
|
3616 |
}
|
|
|
3617 |
|
|
|
3618 |
if ($this->bitmap & self::MASK_SHELL) {
|
|
|
3619 |
$this->bitmap&= ~self::MASK_SHELL;
|
|
|
3620 |
}
|
|
|
3621 |
}
|
|
|
3622 |
|
|
|
3623 |
/**
|
|
|
3624 |
* Disconnect
|
|
|
3625 |
*
|
|
|
3626 |
* @param int $reason
|
|
|
3627 |
* @return bool
|
|
|
3628 |
* @access private
|
|
|
3629 |
*/
|
|
|
3630 |
function _disconnect($reason)
|
|
|
3631 |
{
|
|
|
3632 |
if ($this->bitmap & self::MASK_CONNECTED) {
|
|
|
3633 |
$data = pack('CNNa*Na*', NET_SSH2_MSG_DISCONNECT, $reason, 0, '', 0, '');
|
|
|
3634 |
$this->_send_binary_packet($data);
|
|
|
3635 |
$this->bitmap = 0;
|
|
|
3636 |
fclose($this->fsock);
|
|
|
3637 |
return false;
|
|
|
3638 |
}
|
|
|
3639 |
}
|
|
|
3640 |
|
|
|
3641 |
/**
|
|
|
3642 |
* String Shift
|
|
|
3643 |
*
|
|
|
3644 |
* Inspired by array_shift
|
|
|
3645 |
*
|
|
|
3646 |
* @param string $string
|
|
|
3647 |
* @param int $index
|
|
|
3648 |
* @return string
|
|
|
3649 |
* @access private
|
|
|
3650 |
*/
|
|
|
3651 |
function _string_shift(&$string, $index = 1)
|
|
|
3652 |
{
|
|
|
3653 |
$substr = substr($string, 0, $index);
|
|
|
3654 |
$string = substr($string, $index);
|
|
|
3655 |
return $substr;
|
|
|
3656 |
}
|
|
|
3657 |
|
|
|
3658 |
/**
|
|
|
3659 |
* Define Array
|
|
|
3660 |
*
|
|
|
3661 |
* Takes any number of arrays whose indices are integers and whose values are strings and defines a bunch of
|
|
|
3662 |
* named constants from it, using the value as the name of the constant and the index as the value of the constant.
|
|
|
3663 |
* If any of the constants that would be defined already exists, none of the constants will be defined.
|
|
|
3664 |
*
|
|
|
3665 |
* @param array $array
|
|
|
3666 |
* @access private
|
|
|
3667 |
*/
|
|
|
3668 |
function _define_array()
|
|
|
3669 |
{
|
|
|
3670 |
$args = func_get_args();
|
|
|
3671 |
foreach ($args as $arg) {
|
|
|
3672 |
foreach ($arg as $key => $value) {
|
|
|
3673 |
if (!defined($value)) {
|
|
|
3674 |
define($value, $key);
|
|
|
3675 |
} else {
|
|
|
3676 |
break 2;
|
|
|
3677 |
}
|
|
|
3678 |
}
|
|
|
3679 |
}
|
|
|
3680 |
}
|
|
|
3681 |
|
|
|
3682 |
/**
|
|
|
3683 |
* Returns a log of the packets that have been sent and received.
|
|
|
3684 |
*
|
|
|
3685 |
* Returns a string if NET_SSH2_LOGGING == self::LOG_COMPLEX, an array if NET_SSH2_LOGGING == self::LOG_SIMPLE and false if !defined('NET_SSH2_LOGGING')
|
|
|
3686 |
*
|
|
|
3687 |
* @access public
|
|
|
3688 |
* @return array|false|string
|
|
|
3689 |
*/
|
|
|
3690 |
function getLog()
|
|
|
3691 |
{
|
|
|
3692 |
if (!defined('NET_SSH2_LOGGING')) {
|
|
|
3693 |
return false;
|
|
|
3694 |
}
|
|
|
3695 |
|
|
|
3696 |
switch (NET_SSH2_LOGGING) {
|
|
|
3697 |
case self::LOG_SIMPLE:
|
|
|
3698 |
return $this->message_number_log;
|
|
|
3699 |
break;
|
|
|
3700 |
case self::LOG_COMPLEX:
|
|
|
3701 |
return $this->_format_log($this->message_log, $this->message_number_log);
|
|
|
3702 |
break;
|
|
|
3703 |
default:
|
|
|
3704 |
return false;
|
|
|
3705 |
}
|
|
|
3706 |
}
|
|
|
3707 |
|
|
|
3708 |
/**
|
|
|
3709 |
* Formats a log for printing
|
|
|
3710 |
*
|
|
|
3711 |
* @param array $message_log
|
|
|
3712 |
* @param array $message_number_log
|
|
|
3713 |
* @access private
|
|
|
3714 |
* @return string
|
|
|
3715 |
*/
|
|
|
3716 |
function _format_log($message_log, $message_number_log)
|
|
|
3717 |
{
|
|
|
3718 |
$output = '';
|
|
|
3719 |
for ($i = 0; $i < count($message_log); $i++) {
|
|
|
3720 |
$output.= $message_number_log[$i] . "\r\n";
|
|
|
3721 |
$current_log = $message_log[$i];
|
|
|
3722 |
$j = 0;
|
|
|
3723 |
do {
|
|
|
3724 |
if (strlen($current_log)) {
|
|
|
3725 |
$output.= str_pad(dechex($j), 7, '0', STR_PAD_LEFT) . '0 ';
|
|
|
3726 |
}
|
|
|
3727 |
$fragment = $this->_string_shift($current_log, $this->log_short_width);
|
|
|
3728 |
$hex = substr(preg_replace_callback('#.#s', array($this, '_format_log_helper'), $fragment), strlen($this->log_boundary));
|
|
|
3729 |
// replace non ASCII printable characters with dots
|
|
|
3730 |
// http://en.wikipedia.org/wiki/ASCII#ASCII_printable_characters
|
|
|
3731 |
// also replace < with a . since < messes up the output on web browsers
|
|
|
3732 |
$raw = preg_replace('#[^\x20-\x7E]|<#', '.', $fragment);
|
|
|
3733 |
$output.= str_pad($hex, $this->log_long_width - $this->log_short_width, ' ') . $raw . "\r\n";
|
|
|
3734 |
$j++;
|
|
|
3735 |
} while (strlen($current_log));
|
|
|
3736 |
$output.= "\r\n";
|
|
|
3737 |
}
|
|
|
3738 |
|
|
|
3739 |
return $output;
|
|
|
3740 |
}
|
|
|
3741 |
|
|
|
3742 |
/**
|
|
|
3743 |
* Helper function for _format_log
|
|
|
3744 |
*
|
|
|
3745 |
* For use with preg_replace_callback()
|
|
|
3746 |
*
|
|
|
3747 |
* @param array $matches
|
|
|
3748 |
* @access private
|
|
|
3749 |
* @return string
|
|
|
3750 |
*/
|
|
|
3751 |
function _format_log_helper($matches)
|
|
|
3752 |
{
|
|
|
3753 |
return $this->log_boundary . str_pad(dechex(ord($matches[0])), 2, '0', STR_PAD_LEFT);
|
|
|
3754 |
}
|
|
|
3755 |
|
|
|
3756 |
/**
|
|
|
3757 |
* Helper function for agent->_on_channel_open()
|
|
|
3758 |
*
|
|
|
3759 |
* Used when channels are created to inform agent
|
|
|
3760 |
* of said channel opening. Must be called after
|
|
|
3761 |
* channel open confirmation received
|
|
|
3762 |
*
|
|
|
3763 |
* @access private
|
|
|
3764 |
*/
|
|
|
3765 |
function _on_channel_open()
|
|
|
3766 |
{
|
|
|
3767 |
if (isset($this->agent)) {
|
|
|
3768 |
$this->agent->_on_channel_open($this);
|
|
|
3769 |
}
|
|
|
3770 |
}
|
|
|
3771 |
|
|
|
3772 |
/**
|
|
|
3773 |
* Returns the first value of the intersection of two arrays or false if
|
|
|
3774 |
* the intersection is empty. The order is defined by the first parameter.
|
|
|
3775 |
*
|
|
|
3776 |
* @param array $array1
|
|
|
3777 |
* @param array $array2
|
|
|
3778 |
* @return mixed False if intersection is empty, else intersected value.
|
|
|
3779 |
* @access private
|
|
|
3780 |
*/
|
|
|
3781 |
function _array_intersect_first($array1, $array2)
|
|
|
3782 |
{
|
|
|
3783 |
foreach ($array1 as $value) {
|
|
|
3784 |
if (in_array($value, $array2)) {
|
|
|
3785 |
return $value;
|
|
|
3786 |
}
|
|
|
3787 |
}
|
|
|
3788 |
return false;
|
|
|
3789 |
}
|
|
|
3790 |
|
|
|
3791 |
/**
|
|
|
3792 |
* Returns all errors
|
|
|
3793 |
*
|
|
|
3794 |
* @return string[]
|
|
|
3795 |
* @access public
|
|
|
3796 |
*/
|
|
|
3797 |
function getErrors()
|
|
|
3798 |
{
|
|
|
3799 |
return $this->errors;
|
|
|
3800 |
}
|
|
|
3801 |
|
|
|
3802 |
/**
|
|
|
3803 |
* Returns the last error
|
|
|
3804 |
*
|
|
|
3805 |
* @return string
|
|
|
3806 |
* @access public
|
|
|
3807 |
*/
|
|
|
3808 |
function getLastError()
|
|
|
3809 |
{
|
|
|
3810 |
$count = count($this->errors);
|
|
|
3811 |
|
|
|
3812 |
if ($count > 0) {
|
|
|
3813 |
return $this->errors[$count - 1];
|
|
|
3814 |
}
|
|
|
3815 |
}
|
|
|
3816 |
|
|
|
3817 |
/**
|
|
|
3818 |
* Return the server identification.
|
|
|
3819 |
*
|
|
|
3820 |
* @return string
|
|
|
3821 |
* @access public
|
|
|
3822 |
*/
|
|
|
3823 |
function getServerIdentification()
|
|
|
3824 |
{
|
|
|
3825 |
$this->_connect();
|
|
|
3826 |
|
|
|
3827 |
return $this->server_identifier;
|
|
|
3828 |
}
|
|
|
3829 |
|
|
|
3830 |
/**
|
|
|
3831 |
* Return a list of the key exchange algorithms the server supports.
|
|
|
3832 |
*
|
|
|
3833 |
* @return array
|
|
|
3834 |
* @access public
|
|
|
3835 |
*/
|
|
|
3836 |
function getKexAlgorithms()
|
|
|
3837 |
{
|
|
|
3838 |
$this->_connect();
|
|
|
3839 |
|
|
|
3840 |
return $this->kex_algorithms;
|
|
|
3841 |
}
|
|
|
3842 |
|
|
|
3843 |
/**
|
|
|
3844 |
* Return a list of the host key (public key) algorithms the server supports.
|
|
|
3845 |
*
|
|
|
3846 |
* @return array
|
|
|
3847 |
* @access public
|
|
|
3848 |
*/
|
|
|
3849 |
function getServerHostKeyAlgorithms()
|
|
|
3850 |
{
|
|
|
3851 |
$this->_connect();
|
|
|
3852 |
|
|
|
3853 |
return $this->server_host_key_algorithms;
|
|
|
3854 |
}
|
|
|
3855 |
|
|
|
3856 |
/**
|
|
|
3857 |
* Return a list of the (symmetric key) encryption algorithms the server supports, when receiving stuff from the client.
|
|
|
3858 |
*
|
|
|
3859 |
* @return array
|
|
|
3860 |
* @access public
|
|
|
3861 |
*/
|
|
|
3862 |
function getEncryptionAlgorithmsClient2Server()
|
|
|
3863 |
{
|
|
|
3864 |
$this->_connect();
|
|
|
3865 |
|
|
|
3866 |
return $this->encryption_algorithms_client_to_server;
|
|
|
3867 |
}
|
|
|
3868 |
|
|
|
3869 |
/**
|
|
|
3870 |
* Return a list of the (symmetric key) encryption algorithms the server supports, when sending stuff to the client.
|
|
|
3871 |
*
|
|
|
3872 |
* @return array
|
|
|
3873 |
* @access public
|
|
|
3874 |
*/
|
|
|
3875 |
function getEncryptionAlgorithmsServer2Client()
|
|
|
3876 |
{
|
|
|
3877 |
$this->_connect();
|
|
|
3878 |
|
|
|
3879 |
return $this->encryption_algorithms_server_to_client;
|
|
|
3880 |
}
|
|
|
3881 |
|
|
|
3882 |
/**
|
|
|
3883 |
* Return a list of the MAC algorithms the server supports, when receiving stuff from the client.
|
|
|
3884 |
*
|
|
|
3885 |
* @return array
|
|
|
3886 |
* @access public
|
|
|
3887 |
*/
|
|
|
3888 |
function getMACAlgorithmsClient2Server()
|
|
|
3889 |
{
|
|
|
3890 |
$this->_connect();
|
|
|
3891 |
|
|
|
3892 |
return $this->mac_algorithms_client_to_server;
|
|
|
3893 |
}
|
|
|
3894 |
|
|
|
3895 |
/**
|
|
|
3896 |
* Return a list of the MAC algorithms the server supports, when sending stuff to the client.
|
|
|
3897 |
*
|
|
|
3898 |
* @return array
|
|
|
3899 |
* @access public
|
|
|
3900 |
*/
|
|
|
3901 |
function getMACAlgorithmsServer2Client()
|
|
|
3902 |
{
|
|
|
3903 |
$this->_connect();
|
|
|
3904 |
|
|
|
3905 |
return $this->mac_algorithms_server_to_client;
|
|
|
3906 |
}
|
|
|
3907 |
|
|
|
3908 |
/**
|
|
|
3909 |
* Return a list of the compression algorithms the server supports, when receiving stuff from the client.
|
|
|
3910 |
*
|
|
|
3911 |
* @return array
|
|
|
3912 |
* @access public
|
|
|
3913 |
*/
|
|
|
3914 |
function getCompressionAlgorithmsClient2Server()
|
|
|
3915 |
{
|
|
|
3916 |
$this->_connect();
|
|
|
3917 |
|
|
|
3918 |
return $this->compression_algorithms_client_to_server;
|
|
|
3919 |
}
|
|
|
3920 |
|
|
|
3921 |
/**
|
|
|
3922 |
* Return a list of the compression algorithms the server supports, when sending stuff to the client.
|
|
|
3923 |
*
|
|
|
3924 |
* @return array
|
|
|
3925 |
* @access public
|
|
|
3926 |
*/
|
|
|
3927 |
function getCompressionAlgorithmsServer2Client()
|
|
|
3928 |
{
|
|
|
3929 |
$this->_connect();
|
|
|
3930 |
|
|
|
3931 |
return $this->compression_algorithms_server_to_client;
|
|
|
3932 |
}
|
|
|
3933 |
|
|
|
3934 |
/**
|
|
|
3935 |
* Return a list of the languages the server supports, when sending stuff to the client.
|
|
|
3936 |
*
|
|
|
3937 |
* @return array
|
|
|
3938 |
* @access public
|
|
|
3939 |
*/
|
|
|
3940 |
function getLanguagesServer2Client()
|
|
|
3941 |
{
|
|
|
3942 |
$this->_connect();
|
|
|
3943 |
|
|
|
3944 |
return $this->languages_server_to_client;
|
|
|
3945 |
}
|
|
|
3946 |
|
|
|
3947 |
/**
|
|
|
3948 |
* Return a list of the languages the server supports, when receiving stuff from the client.
|
|
|
3949 |
*
|
|
|
3950 |
* @return array
|
|
|
3951 |
* @access public
|
|
|
3952 |
*/
|
|
|
3953 |
function getLanguagesClient2Server()
|
|
|
3954 |
{
|
|
|
3955 |
$this->_connect();
|
|
|
3956 |
|
|
|
3957 |
return $this->languages_client_to_server;
|
|
|
3958 |
}
|
|
|
3959 |
|
|
|
3960 |
/**
|
|
|
3961 |
* Returns the banner message.
|
|
|
3962 |
*
|
|
|
3963 |
* Quoting from the RFC, "in some jurisdictions, sending a warning message before
|
|
|
3964 |
* authentication may be relevant for getting legal protection."
|
|
|
3965 |
*
|
|
|
3966 |
* @return string
|
|
|
3967 |
* @access public
|
|
|
3968 |
*/
|
|
|
3969 |
function getBannerMessage()
|
|
|
3970 |
{
|
|
|
3971 |
return $this->banner_message;
|
|
|
3972 |
}
|
|
|
3973 |
|
|
|
3974 |
/**
|
|
|
3975 |
* Returns the server public host key.
|
|
|
3976 |
*
|
|
|
3977 |
* Caching this the first time you connect to a server and checking the result on subsequent connections
|
|
|
3978 |
* is recommended. Returns false if the server signature is not signed correctly with the public host key.
|
|
|
3979 |
*
|
|
|
3980 |
* @return mixed
|
|
|
3981 |
* @access public
|
|
|
3982 |
*/
|
|
|
3983 |
function getServerPublicHostKey()
|
|
|
3984 |
{
|
|
|
3985 |
if (!($this->bitmap & self::MASK_CONSTRUCTOR)) {
|
|
|
3986 |
if (!$this->_connect()) {
|
|
|
3987 |
return false;
|
|
|
3988 |
}
|
|
|
3989 |
}
|
|
|
3990 |
|
|
|
3991 |
$signature = $this->signature;
|
|
|
3992 |
$server_public_host_key = $this->server_public_host_key;
|
|
|
3993 |
|
|
|
3994 |
extract(unpack('Nlength', $this->_string_shift($server_public_host_key, 4)));
|
|
|
3995 |
$this->_string_shift($server_public_host_key, $length);
|
|
|
3996 |
|
|
|
3997 |
if ($this->signature_validated) {
|
|
|
3998 |
return $this->bitmap ?
|
|
|
3999 |
$this->signature_format . ' ' . base64_encode($this->server_public_host_key) :
|
|
|
4000 |
false;
|
|
|
4001 |
}
|
|
|
4002 |
|
|
|
4003 |
$this->signature_validated = true;
|
|
|
4004 |
|
|
|
4005 |
switch ($this->signature_format) {
|
|
|
4006 |
case 'ssh-dss':
|
|
|
4007 |
$zero = new BigInteger();
|
|
|
4008 |
|
|
|
4009 |
$temp = unpack('Nlength', $this->_string_shift($server_public_host_key, 4));
|
|
|
4010 |
$p = new BigInteger($this->_string_shift($server_public_host_key, $temp['length']), -256);
|
|
|
4011 |
|
|
|
4012 |
$temp = unpack('Nlength', $this->_string_shift($server_public_host_key, 4));
|
|
|
4013 |
$q = new BigInteger($this->_string_shift($server_public_host_key, $temp['length']), -256);
|
|
|
4014 |
|
|
|
4015 |
$temp = unpack('Nlength', $this->_string_shift($server_public_host_key, 4));
|
|
|
4016 |
$g = new BigInteger($this->_string_shift($server_public_host_key, $temp['length']), -256);
|
|
|
4017 |
|
|
|
4018 |
$temp = unpack('Nlength', $this->_string_shift($server_public_host_key, 4));
|
|
|
4019 |
$y = new BigInteger($this->_string_shift($server_public_host_key, $temp['length']), -256);
|
|
|
4020 |
|
|
|
4021 |
/* The value for 'dss_signature_blob' is encoded as a string containing
|
|
|
4022 |
r, followed by s (which are 160-bit integers, without lengths or
|
|
|
4023 |
padding, unsigned, and in network byte order). */
|
|
|
4024 |
$temp = unpack('Nlength', $this->_string_shift($signature, 4));
|
|
|
4025 |
if ($temp['length'] != 40) {
|
|
|
4026 |
user_error('Invalid signature');
|
|
|
4027 |
return $this->_disconnect(NET_SSH2_DISCONNECT_KEY_EXCHANGE_FAILED);
|
|
|
4028 |
}
|
|
|
4029 |
|
|
|
4030 |
$r = new BigInteger($this->_string_shift($signature, 20), 256);
|
|
|
4031 |
$s = new BigInteger($this->_string_shift($signature, 20), 256);
|
|
|
4032 |
|
|
|
4033 |
switch (true) {
|
|
|
4034 |
case $r->equals($zero):
|
|
|
4035 |
case $r->compare($q) >= 0:
|
|
|
4036 |
case $s->equals($zero):
|
|
|
4037 |
case $s->compare($q) >= 0:
|
|
|
4038 |
user_error('Invalid signature');
|
|
|
4039 |
return $this->_disconnect(NET_SSH2_DISCONNECT_KEY_EXCHANGE_FAILED);
|
|
|
4040 |
}
|
|
|
4041 |
|
|
|
4042 |
$w = $s->modInverse($q);
|
|
|
4043 |
|
|
|
4044 |
$u1 = $w->multiply(new BigInteger(sha1($this->exchange_hash), 16));
|
|
|
4045 |
list(, $u1) = $u1->divide($q);
|
|
|
4046 |
|
|
|
4047 |
$u2 = $w->multiply($r);
|
|
|
4048 |
list(, $u2) = $u2->divide($q);
|
|
|
4049 |
|
|
|
4050 |
$g = $g->modPow($u1, $p);
|
|
|
4051 |
$y = $y->modPow($u2, $p);
|
|
|
4052 |
|
|
|
4053 |
$v = $g->multiply($y);
|
|
|
4054 |
list(, $v) = $v->divide($p);
|
|
|
4055 |
list(, $v) = $v->divide($q);
|
|
|
4056 |
|
|
|
4057 |
if (!$v->equals($r)) {
|
|
|
4058 |
user_error('Bad server signature');
|
|
|
4059 |
return $this->_disconnect(NET_SSH2_DISCONNECT_HOST_KEY_NOT_VERIFIABLE);
|
|
|
4060 |
}
|
|
|
4061 |
|
|
|
4062 |
break;
|
|
|
4063 |
case 'ssh-rsa':
|
|
|
4064 |
$temp = unpack('Nlength', $this->_string_shift($server_public_host_key, 4));
|
|
|
4065 |
$e = new BigInteger($this->_string_shift($server_public_host_key, $temp['length']), -256);
|
|
|
4066 |
|
|
|
4067 |
$temp = unpack('Nlength', $this->_string_shift($server_public_host_key, 4));
|
|
|
4068 |
$rawN = $this->_string_shift($server_public_host_key, $temp['length']);
|
|
|
4069 |
$n = new BigInteger($rawN, -256);
|
|
|
4070 |
$nLength = strlen(ltrim($rawN, "\0"));
|
|
|
4071 |
|
|
|
4072 |
/*
|
|
|
4073 |
$temp = unpack('Nlength', $this->_string_shift($signature, 4));
|
|
|
4074 |
$signature = $this->_string_shift($signature, $temp['length']);
|
|
|
4075 |
|
|
|
4076 |
$rsa = new RSA();
|
|
|
4077 |
$rsa->setSignatureMode(RSA::SIGNATURE_PKCS1);
|
|
|
4078 |
$rsa->loadKey(array('e' => $e, 'n' => $n), RSA::PUBLIC_FORMAT_RAW);
|
|
|
4079 |
if (!$rsa->verify($this->exchange_hash, $signature)) {
|
|
|
4080 |
user_error('Bad server signature');
|
|
|
4081 |
return $this->_disconnect(NET_SSH2_DISCONNECT_HOST_KEY_NOT_VERIFIABLE);
|
|
|
4082 |
}
|
|
|
4083 |
*/
|
|
|
4084 |
|
|
|
4085 |
$temp = unpack('Nlength', $this->_string_shift($signature, 4));
|
|
|
4086 |
$s = new BigInteger($this->_string_shift($signature, $temp['length']), 256);
|
|
|
4087 |
|
|
|
4088 |
// validate an RSA signature per "8.2 RSASSA-PKCS1-v1_5", "5.2.2 RSAVP1", and "9.1 EMSA-PSS" in the
|
|
|
4089 |
// following URL:
|
|
|
4090 |
// ftp://ftp.rsasecurity.com/pub/pkcs/pkcs-1/pkcs-1v2-1.pdf
|
|
|
4091 |
|
|
|
4092 |
// also, see SSHRSA.c (rsa2_verifysig) in PuTTy's source.
|
|
|
4093 |
|
|
|
4094 |
if ($s->compare(new BigInteger()) < 0 || $s->compare($n->subtract(new BigInteger(1))) > 0) {
|
|
|
4095 |
user_error('Invalid signature');
|
|
|
4096 |
return $this->_disconnect(NET_SSH2_DISCONNECT_KEY_EXCHANGE_FAILED);
|
|
|
4097 |
}
|
|
|
4098 |
|
|
|
4099 |
$s = $s->modPow($e, $n);
|
|
|
4100 |
$s = $s->toBytes();
|
|
|
4101 |
|
|
|
4102 |
$h = pack('N4H*', 0x00302130, 0x0906052B, 0x0E03021A, 0x05000414, sha1($this->exchange_hash));
|
|
|
4103 |
$h = chr(0x01) . str_repeat(chr(0xFF), $nLength - 2 - strlen($h)) . $h;
|
|
|
4104 |
|
|
|
4105 |
if ($s != $h) {
|
|
|
4106 |
user_error('Bad server signature');
|
|
|
4107 |
return $this->_disconnect(NET_SSH2_DISCONNECT_HOST_KEY_NOT_VERIFIABLE);
|
|
|
4108 |
}
|
|
|
4109 |
break;
|
|
|
4110 |
default:
|
|
|
4111 |
user_error('Unsupported signature format');
|
|
|
4112 |
return $this->_disconnect(NET_SSH2_DISCONNECT_HOST_KEY_NOT_VERIFIABLE);
|
|
|
4113 |
}
|
|
|
4114 |
|
|
|
4115 |
return $this->signature_format . ' ' . base64_encode($this->server_public_host_key);
|
|
|
4116 |
}
|
|
|
4117 |
|
|
|
4118 |
/**
|
|
|
4119 |
* Returns the exit status of an SSH command or false.
|
|
|
4120 |
*
|
|
|
4121 |
* @return false|int
|
|
|
4122 |
* @access public
|
|
|
4123 |
*/
|
|
|
4124 |
function getExitStatus()
|
|
|
4125 |
{
|
|
|
4126 |
if (is_null($this->exit_status)) {
|
|
|
4127 |
return false;
|
|
|
4128 |
}
|
|
|
4129 |
return $this->exit_status;
|
|
|
4130 |
}
|
|
|
4131 |
|
|
|
4132 |
/**
|
|
|
4133 |
* Returns the number of columns for the terminal window size.
|
|
|
4134 |
*
|
|
|
4135 |
* @return int
|
|
|
4136 |
* @access public
|
|
|
4137 |
*/
|
|
|
4138 |
function getWindowColumns()
|
|
|
4139 |
{
|
|
|
4140 |
return $this->windowColumns;
|
|
|
4141 |
}
|
|
|
4142 |
|
|
|
4143 |
/**
|
|
|
4144 |
* Returns the number of rows for the terminal window size.
|
|
|
4145 |
*
|
|
|
4146 |
* @return int
|
|
|
4147 |
* @access public
|
|
|
4148 |
*/
|
|
|
4149 |
function getWindowRows()
|
|
|
4150 |
{
|
|
|
4151 |
return $this->windowRows;
|
|
|
4152 |
}
|
|
|
4153 |
|
|
|
4154 |
/**
|
|
|
4155 |
* Sets the number of columns for the terminal window size.
|
|
|
4156 |
*
|
|
|
4157 |
* @param int $value
|
|
|
4158 |
* @access public
|
|
|
4159 |
*/
|
|
|
4160 |
function setWindowColumns($value)
|
|
|
4161 |
{
|
|
|
4162 |
$this->windowColumns = $value;
|
|
|
4163 |
}
|
|
|
4164 |
|
|
|
4165 |
/**
|
|
|
4166 |
* Sets the number of rows for the terminal window size.
|
|
|
4167 |
*
|
|
|
4168 |
* @param int $value
|
|
|
4169 |
* @access public
|
|
|
4170 |
*/
|
|
|
4171 |
function setWindowRows($value)
|
|
|
4172 |
{
|
|
|
4173 |
$this->windowRows = $value;
|
|
|
4174 |
}
|
|
|
4175 |
|
|
|
4176 |
/**
|
|
|
4177 |
* Sets the number of columns and rows for the terminal window size.
|
|
|
4178 |
*
|
|
|
4179 |
* @param int $columns
|
|
|
4180 |
* @param int $rows
|
|
|
4181 |
* @access public
|
|
|
4182 |
*/
|
|
|
4183 |
function setWindowSize($columns = 80, $rows = 24)
|
|
|
4184 |
{
|
|
|
4185 |
$this->windowColumns = $columns;
|
|
|
4186 |
$this->windowRows = $rows;
|
|
|
4187 |
}
|
|
|
4188 |
}
|