/
SSH2.php
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SSH2.php
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<?php
/**
* Pure-PHP implementation of SSHv2.
*
* PHP version 5
*
* Here are some examples of how to use this library:
* <code>
* <?php
* include 'vendor/autoload.php';
*
* $ssh = new \phpseclib\Net\SSH2('www.domain.tld');
* if (!$ssh->login('username', 'password')) {
* exit('Login Failed');
* }
*
* echo $ssh->exec('pwd');
* echo $ssh->exec('ls -la');
* ?>
* </code>
*
* <code>
* <?php
* include 'vendor/autoload.php';
*
* $key = new \phpseclib\Crypt\RSA();
* //$key->setPassword('whatever');
* $key->loadKey(file_get_contents('privatekey'));
*
* $ssh = new \phpseclib\Net\SSH2('www.domain.tld');
* if (!$ssh->login('username', $key)) {
* exit('Login Failed');
* }
*
* echo $ssh->read('username@username:~$');
* $ssh->write("ls -la\n");
* echo $ssh->read('username@username:~$');
* ?>
* </code>
*
* @category Net
* @package SSH2
* @author Jim Wigginton <terrafrost@php.net>
* @copyright 2007 Jim Wigginton
* @license http://www.opensource.org/licenses/mit-license.html MIT License
* @link http://phpseclib.sourceforge.net
*/
namespace phpseclib\Net;
use phpseclib\Crypt\Base;
use phpseclib\Crypt\Blowfish;
use phpseclib\Crypt\Hash;
use phpseclib\Crypt\Random;
use phpseclib\Crypt\RC4;
use phpseclib\Crypt\Rijndael;
use phpseclib\Crypt\RSA;
use phpseclib\Crypt\TripleDES;
use phpseclib\Crypt\Twofish;
use phpseclib\Math\BigInteger; // Used to do Diffie-Hellman key exchange and DSA/RSA signature verification.
use phpseclib\System\SSH\Agent;
/**
* Pure-PHP implementation of SSHv2.
*
* @package SSH2
* @author Jim Wigginton <terrafrost@php.net>
* @access public
*/
class SSH2
{
/**#@+
* Execution Bitmap Masks
*
* @see \phpseclib\Net\SSH2::bitmap
* @access private
*/
const MASK_CONSTRUCTOR = 0x00000001;
const MASK_CONNECTED = 0x00000002;
const MASK_LOGIN_REQ = 0x00000004;
const MASK_LOGIN = 0x00000008;
const MASK_SHELL = 0x00000010;
const MASK_WINDOW_ADJUST = 0x00000020;
/**#@-*/
/**#@+
* Channel constants
*
* RFC4254 refers not to client and server channels but rather to sender and recipient channels. we don't refer
* to them in that way because RFC4254 toggles the meaning. the client sends a SSH_MSG_CHANNEL_OPEN message with
* a sender channel and the server sends a SSH_MSG_CHANNEL_OPEN_CONFIRMATION in response, with a sender and a
* recepient channel. at first glance, you might conclude that SSH_MSG_CHANNEL_OPEN_CONFIRMATION's sender channel
* would be the same thing as SSH_MSG_CHANNEL_OPEN's sender channel, but it's not, per this snipet:
* The 'recipient channel' is the channel number given in the original
* open request, and 'sender channel' is the channel number allocated by
* the other side.
*
* @see \phpseclib\Net\SSH2::_send_channel_packet()
* @see \phpseclib\Net\SSH2::_get_channel_packet()
* @access private
*/
const CHANNEL_EXEC = 0; // PuTTy uses 0x100
const CHANNEL_SHELL = 1;
const CHANNEL_SUBSYSTEM = 2;
const CHANNEL_AGENT_FORWARD = 3;
/**#@-*/
/**#@+
* @access public
* @see \phpseclib\Net\SSH2::getLog()
*/
/**
* Returns the message numbers
*/
const LOG_SIMPLE = 1;
/**
* Returns the message content
*/
const LOG_COMPLEX = 2;
/**
* Outputs the content real-time
*/
const LOG_REALTIME = 3;
/**
* Dumps the content real-time to a file
*/
const LOG_REALTIME_FILE = 4;
/**#@-*/
/**#@+
* @access public
* @see \phpseclib\Net\SSH2::read()
*/
/**
* Returns when a string matching $expect exactly is found
*/
const READ_SIMPLE = 1;
/**
* Returns when a string matching the regular expression $expect is found
*/
const READ_REGEX = 2;
/**
* Make sure that the log never gets larger than this
*/
const LOG_MAX_SIZE = 1048576; // 1024 * 1024
/**#@-*/
/**
* The SSH identifier
*
* @var String
* @access private
*/
var $identifier;
/**
* The Socket Object
*
* @var Object
* @access private
*/
var $fsock;
/**
* Execution Bitmap
*
* The bits that are set represent functions that have been called already. This is used to determine
* if a requisite function has been successfully executed. If not, an error should be thrown.
*
* @var Integer
* @access private
*/
var $bitmap = 0;
/**
* Error information
*
* @see \phpseclib\Net\SSH2::getErrors()
* @see \phpseclib\Net\SSH2::getLastError()
* @var String
* @access private
*/
var $errors = array();
/**
* Server Identifier
*
* @see \phpseclib\Net\SSH2::getServerIdentification()
* @var mixed false or Array
* @access private
*/
var $server_identifier = false;
/**
* Key Exchange Algorithms
*
* @see \phpseclib\Net\SSH2::getKexAlgorithims()
* @var mixed false or Array
* @access private
*/
var $kex_algorithms = false;
/**
* Minimum Diffie-Hellman Group Bit Size in RFC 4419 Key Exchange Methods
*
* @see Net_SSH2::_key_exchange()
* @var Integer
* @access private
*/
var $kex_dh_group_size_min = 1536;
/**
* Preferred Diffie-Hellman Group Bit Size in RFC 4419 Key Exchange Methods
*
* @see Net_SSH2::_key_exchange()
* @var Integer
* @access private
*/
var $kex_dh_group_size_preferred = 2048;
/**
* Maximum Diffie-Hellman Group Bit Size in RFC 4419 Key Exchange Methods
*
* @see Net_SSH2::_key_exchange()
* @var Integer
* @access private
*/
var $kex_dh_group_size_max = 4096;
/**
* Server Host Key Algorithms
*
* @see \phpseclib\Net\SSH2::getServerHostKeyAlgorithms()
* @var mixed false or Array
* @access private
*/
var $server_host_key_algorithms = false;
/**
* Encryption Algorithms: Client to Server
*
* @see \phpseclib\Net\SSH2::getEncryptionAlgorithmsClient2Server()
* @var mixed false or Array
* @access private
*/
var $encryption_algorithms_client_to_server = false;
/**
* Encryption Algorithms: Server to Client
*
* @see \phpseclib\Net\SSH2::getEncryptionAlgorithmsServer2Client()
* @var mixed false or Array
* @access private
*/
var $encryption_algorithms_server_to_client = false;
/**
* MAC Algorithms: Client to Server
*
* @see \phpseclib\Net\SSH2::getMACAlgorithmsClient2Server()
* @var mixed false or Array
* @access private
*/
var $mac_algorithms_client_to_server = false;
/**
* MAC Algorithms: Server to Client
*
* @see \phpseclib\Net\SSH2::getMACAlgorithmsServer2Client()
* @var mixed false or Array
* @access private
*/
var $mac_algorithms_server_to_client = false;
/**
* Compression Algorithms: Client to Server
*
* @see \phpseclib\Net\SSH2::getCompressionAlgorithmsClient2Server()
* @var mixed false or Array
* @access private
*/
var $compression_algorithms_client_to_server = false;
/**
* Compression Algorithms: Server to Client
*
* @see \phpseclib\Net\SSH2::getCompressionAlgorithmsServer2Client()
* @var mixed false or Array
* @access private
*/
var $compression_algorithms_server_to_client = false;
/**
* Languages: Server to Client
*
* @see \phpseclib\Net\SSH2::getLanguagesServer2Client()
* @var mixed false or Array
* @access private
*/
var $languages_server_to_client = false;
/**
* Languages: Client to Server
*
* @see \phpseclib\Net\SSH2::getLanguagesClient2Server()
* @var mixed false or Array
* @access private
*/
var $languages_client_to_server = false;
/**
* Block Size for Server to Client Encryption
*
* "Note that the length of the concatenation of 'packet_length',
* 'padding_length', 'payload', and 'random padding' MUST be a multiple
* of the cipher block size or 8, whichever is larger. This constraint
* MUST be enforced, even when using stream ciphers."
*
* -- http://tools.ietf.org/html/rfc4253#section-6
*
* @see \phpseclib\Net\SSH2::__construct()
* @see \phpseclib\Net\SSH2::_send_binary_packet()
* @var Integer
* @access private
*/
var $encrypt_block_size = 8;
/**
* Block Size for Client to Server Encryption
*
* @see \phpseclib\Net\SSH2::__construct()
* @see \phpseclib\Net\SSH2::_get_binary_packet()
* @var Integer
* @access private
*/
var $decrypt_block_size = 8;
/**
* Server to Client Encryption Object
*
* @see \phpseclib\Net\SSH2::_get_binary_packet()
* @var Object
* @access private
*/
var $decrypt = false;
/**
* Client to Server Encryption Object
*
* @see \phpseclib\Net\SSH2::_send_binary_packet()
* @var Object
* @access private
*/
var $encrypt = false;
/**
* Client to Server HMAC Object
*
* @see \phpseclib\Net\SSH2::_send_binary_packet()
* @var Object
* @access private
*/
var $hmac_create = false;
/**
* Server to Client HMAC Object
*
* @see \phpseclib\Net\SSH2::_get_binary_packet()
* @var Object
* @access private
*/
var $hmac_check = false;
/**
* Size of server to client HMAC
*
* We need to know how big the HMAC will be for the server to client direction so that we know how many bytes to read.
* For the client to server side, the HMAC object will make the HMAC as long as it needs to be. All we need to do is
* append it.
*
* @see \phpseclib\Net\SSH2::_get_binary_packet()
* @var Integer
* @access private
*/
var $hmac_size = false;
/**
* Server Public Host Key
*
* @see \phpseclib\Net\SSH2::getServerPublicHostKey()
* @var String
* @access private
*/
var $server_public_host_key;
/**
* Session identifer
*
* "The exchange hash H from the first key exchange is additionally
* used as the session identifier, which is a unique identifier for
* this connection."
*
* -- http://tools.ietf.org/html/rfc4253#section-7.2
*
* @see \phpseclib\Net\SSH2::_key_exchange()
* @var String
* @access private
*/
var $session_id = false;
/**
* Exchange hash
*
* The current exchange hash
*
* @see \phpseclib\Net\SSH2::_key_exchange()
* @var String
* @access private
*/
var $exchange_hash = false;
/**
* Message Numbers
*
* @see \phpseclib\Net\SSH2::__construct()
* @var Array
* @access private
*/
var $message_numbers = array();
/**
* Disconnection Message 'reason codes' defined in RFC4253
*
* @see \phpseclib\Net\SSH2::__construct()
* @var Array
* @access private
*/
var $disconnect_reasons = array();
/**
* SSH_MSG_CHANNEL_OPEN_FAILURE 'reason codes', defined in RFC4254
*
* @see \phpseclib\Net\SSH2::__construct()
* @var Array
* @access private
*/
var $channel_open_failure_reasons = array();
/**
* Terminal Modes
*
* @link http://tools.ietf.org/html/rfc4254#section-8
* @see \phpseclib\Net\SSH2::__construct()
* @var Array
* @access private
*/
var $terminal_modes = array();
/**
* SSH_MSG_CHANNEL_EXTENDED_DATA's data_type_codes
*
* @link http://tools.ietf.org/html/rfc4254#section-5.2
* @see \phpseclib\Net\SSH2::__construct()
* @var Array
* @access private
*/
var $channel_extended_data_type_codes = array();
/**
* Send Sequence Number
*
* See 'Section 6.4. Data Integrity' of rfc4253 for more info.
*
* @see \phpseclib\Net\SSH2::_send_binary_packet()
* @var Integer
* @access private
*/
var $send_seq_no = 0;
/**
* Get Sequence Number
*
* See 'Section 6.4. Data Integrity' of rfc4253 for more info.
*
* @see \phpseclib\Net\SSH2::_get_binary_packet()
* @var Integer
* @access private
*/
var $get_seq_no = 0;
/**
* Server Channels
*
* Maps client channels to server channels
*
* @see \phpseclib\Net\SSH2::_get_channel_packet()
* @see \phpseclib\Net\SSH2::exec()
* @var Array
* @access private
*/
var $server_channels = array();
/**
* Channel Buffers
*
* If a client requests a packet from one channel but receives two packets from another those packets should
* be placed in a buffer
*
* @see \phpseclib\Net\SSH2::_get_channel_packet()
* @see \phpseclib\Net\SSH2::exec()
* @var Array
* @access private
*/
var $channel_buffers = array();
/**
* Channel Status
*
* Contains the type of the last sent message
*
* @see \phpseclib\Net\SSH2::_get_channel_packet()
* @var Array
* @access private
*/
var $channel_status = array();
/**
* Packet Size
*
* Maximum packet size indexed by channel
*
* @see \phpseclib\Net\SSH2::_send_channel_packet()
* @var Array
* @access private
*/
var $packet_size_client_to_server = array();
/**
* Message Number Log
*
* @see \phpseclib\Net\SSH2::getLog()
* @var Array
* @access private
*/
var $message_number_log = array();
/**
* Message Log
*
* @see \phpseclib\Net\SSH2::getLog()
* @var Array
* @access private
*/
var $message_log = array();
/**
* The Window Size
*
* Bytes the other party can send before it must wait for the window to be adjusted (0x7FFFFFFF = 2GB)
*
* @var Integer
* @see \phpseclib\Net\SSH2::_send_channel_packet()
* @see \phpseclib\Net\SSH2::exec()
* @access private
*/
var $window_size = 0x7FFFFFFF;
/**
* Window size, server to client
*
* Window size indexed by channel
*
* @see \phpseclib\Net\SSH2::_send_channel_packet()
* @var Array
* @access private
*/
var $window_size_server_to_client = array();
/**
* Window size, client to server
*
* Window size indexed by channel
*
* @see \phpseclib\Net\SSH2::_get_channel_packet()
* @var Array
* @access private
*/
var $window_size_client_to_server = array();
/**
* Server signature
*
* Verified against $this->session_id
*
* @see \phpseclib\Net\SSH2::getServerPublicHostKey()
* @var String
* @access private
*/
var $signature = '';
/**
* Server signature format
*
* ssh-rsa or ssh-dss.
*
* @see \phpseclib\Net\SSH2::getServerPublicHostKey()
* @var String
* @access private
*/
var $signature_format = '';
/**
* Interactive Buffer
*
* @see \phpseclib\Net\SSH2::read()
* @var Array
* @access private
*/
var $interactiveBuffer = '';
/**
* Current log size
*
* Should never exceed self::LOG_MAX_SIZE
*
* @see \phpseclib\Net\SSH2::_send_binary_packet()
* @see \phpseclib\Net\SSH2::_get_binary_packet()
* @var Integer
* @access private
*/
var $log_size;
/**
* Timeout
*
* @see \phpseclib\Net\SSH2::setTimeout()
* @access private
*/
var $timeout;
/**
* Current Timeout
*
* @see \phpseclib\Net\SSH2::_get_channel_packet()
* @access private
*/
var $curTimeout;
/**
* Real-time log file pointer
*
* @see \phpseclib\Net\SSH2::_append_log()
* @var Resource
* @access private
*/
var $realtime_log_file;
/**
* Real-time log file size
*
* @see \phpseclib\Net\SSH2::_append_log()
* @var Integer
* @access private
*/
var $realtime_log_size;
/**
* Has the signature been validated?
*
* @see \phpseclib\Net\SSH2::getServerPublicHostKey()
* @var Boolean
* @access private
*/
var $signature_validated = false;
/**
* Real-time log file wrap boolean
*
* @see \phpseclib\Net\SSH2::_append_log()
* @access private
*/
var $realtime_log_wrap;
/**
* Flag to suppress stderr from output
*
* @see \phpseclib\Net\SSH2::enableQuietMode()
* @access private
*/
var $quiet_mode = false;
/**
* Time of first network activity
*
* @var Integer
* @access private
*/
var $last_packet;
/**
* Exit status returned from ssh if any
*
* @var Integer
* @access private
*/
var $exit_status;
/**
* Flag to request a PTY when using exec()
*
* @var Boolean
* @see \phpseclib\Net\SSH2::enablePTY()
* @access private
*/
var $request_pty = false;
/**
* Flag set while exec() is running when using enablePTY()
*
* @var Boolean
* @access private
*/
var $in_request_pty_exec = false;
/**
* Flag set after startSubsystem() is called
*
* @var Boolean
* @access private
*/
var $in_subsystem;
/**
* Contents of stdError
*
* @var String
* @access private
*/
var $stdErrorLog;
/**
* The Last Interactive Response
*
* @see \phpseclib\Net\SSH2::_keyboard_interactive_process()
* @var String
* @access private
*/
var $last_interactive_response = '';
/**
* Keyboard Interactive Request / Responses
*
* @see \phpseclib\Net\SSH2::_keyboard_interactive_process()
* @var Array
* @access private
*/
var $keyboard_requests_responses = array();
/**
* Banner Message
*
* Quoting from the RFC, "in some jurisdictions, sending a warning message before
* authentication may be relevant for getting legal protection."
*
* @see \phpseclib\Net\SSH2::_filter()
* @see \phpseclib\Net\SSH2::getBannerMessage()
* @var String
* @access private
*/
var $banner_message = '';
/**
* Did read() timeout or return normally?
*
* @see \phpseclib\Net\SSH2::isTimeout()
* @var Boolean
* @access private
*/
var $is_timeout = false;
/**
* Log Boundary
*
* @see \phpseclib\Net\SSH2::_format_log()
* @var String
* @access private
*/
var $log_boundary = ':';
/**
* Log Long Width
*
* @see \phpseclib\Net\SSH2::_format_log()
* @var Integer
* @access private
*/
var $log_long_width = 65;
/**
* Log Short Width
*
* @see \phpseclib\Net\SSH2::_format_log()
* @var Integer
* @access private
*/
var $log_short_width = 16;
/**
* Hostname
*
* @see \phpseclib\Net\SSH2::__construct()
* @see \phpseclib\Net\SSH2::_connect()
* @var String
* @access private
*/
var $host;
/**
* Port Number
*
* @see \phpseclib\Net\SSH2::__construct()
* @see \phpseclib\Net\SSH2::_connect()
* @var Integer
* @access private
*/
var $port;
/**
* Number of columns for terminal window size
*
* @see \phpseclib\Net\SSH2::getWindowColumns()
* @see \phpseclib\Net\SSH2::setWindowColumns()
* @see \phpseclib\Net\SSH2::setWindowSize()
* @var Integer
* @access private
*/
var $windowColumns = 80;
/**
* Number of columns for terminal window size
*
* @see \phpseclib\Net\SSH2::getWindowRows()
* @see \phpseclib\Net\SSH2::setWindowRows()
* @see \phpseclib\Net\SSH2::setWindowSize()
* @var Integer
* @access private
*/
var $windowRows = 24;
/**
* Crypto Engine
*
* @see Net_SSH2::setCryptoEngine()
* @see Net_SSH2::_key_exchange()
* @var Integer
* @access private
*/
var $crypto_engine = false;
/**
* A System_SSH_Agent for use in the SSH2 Agent Forwarding scenario
*
* @var System_SSH_Agent
* @access private
*/
var $agent;
/**
* Default Constructor.
*
* $host can either be a string, representing the host, or a stream resource.
*
* @param Mixed $host
* @param optional Integer $port
* @param optional Integer $timeout
* @see \phpseclib\Net\SSH2::login()
* @return \phpseclib\Net\SSH2
* @access public
*/
function __construct($host, $port = 22, $timeout = 10)
{
$this->message_numbers = array(
1 => 'NET_SSH2_MSG_DISCONNECT',
2 => 'NET_SSH2_MSG_IGNORE',
3 => 'NET_SSH2_MSG_UNIMPLEMENTED',
4 => 'NET_SSH2_MSG_DEBUG',
5 => 'NET_SSH2_MSG_SERVICE_REQUEST',
6 => 'NET_SSH2_MSG_SERVICE_ACCEPT',
20 => 'NET_SSH2_MSG_KEXINIT',
21 => 'NET_SSH2_MSG_NEWKEYS',
30 => 'NET_SSH2_MSG_KEXDH_INIT',
31 => 'NET_SSH2_MSG_KEXDH_REPLY',
50 => 'NET_SSH2_MSG_USERAUTH_REQUEST',
51 => 'NET_SSH2_MSG_USERAUTH_FAILURE',
52 => 'NET_SSH2_MSG_USERAUTH_SUCCESS',
53 => 'NET_SSH2_MSG_USERAUTH_BANNER',
80 => 'NET_SSH2_MSG_GLOBAL_REQUEST',
81 => 'NET_SSH2_MSG_REQUEST_SUCCESS',
82 => 'NET_SSH2_MSG_REQUEST_FAILURE',
90 => 'NET_SSH2_MSG_CHANNEL_OPEN',
91 => 'NET_SSH2_MSG_CHANNEL_OPEN_CONFIRMATION',
92 => 'NET_SSH2_MSG_CHANNEL_OPEN_FAILURE',
93 => 'NET_SSH2_MSG_CHANNEL_WINDOW_ADJUST',
94 => 'NET_SSH2_MSG_CHANNEL_DATA',
95 => 'NET_SSH2_MSG_CHANNEL_EXTENDED_DATA',
96 => 'NET_SSH2_MSG_CHANNEL_EOF',
97 => 'NET_SSH2_MSG_CHANNEL_CLOSE',
98 => 'NET_SSH2_MSG_CHANNEL_REQUEST',
99 => 'NET_SSH2_MSG_CHANNEL_SUCCESS',
100 => 'NET_SSH2_MSG_CHANNEL_FAILURE'
);
$this->disconnect_reasons = array(
1 => 'NET_SSH2_DISCONNECT_HOST_NOT_ALLOWED_TO_CONNECT',
2 => 'NET_SSH2_DISCONNECT_PROTOCOL_ERROR',
3 => 'NET_SSH2_DISCONNECT_KEY_EXCHANGE_FAILED',
4 => 'NET_SSH2_DISCONNECT_RESERVED',
5 => 'NET_SSH2_DISCONNECT_MAC_ERROR',
6 => 'NET_SSH2_DISCONNECT_COMPRESSION_ERROR',
7 => 'NET_SSH2_DISCONNECT_SERVICE_NOT_AVAILABLE',
8 => 'NET_SSH2_DISCONNECT_PROTOCOL_VERSION_NOT_SUPPORTED',
9 => 'NET_SSH2_DISCONNECT_HOST_KEY_NOT_VERIFIABLE',
10 => 'NET_SSH2_DISCONNECT_CONNECTION_LOST',
11 => 'NET_SSH2_DISCONNECT_BY_APPLICATION',
12 => 'NET_SSH2_DISCONNECT_TOO_MANY_CONNECTIONS',
13 => 'NET_SSH2_DISCONNECT_AUTH_CANCELLED_BY_USER',
14 => 'NET_SSH2_DISCONNECT_NO_MORE_AUTH_METHODS_AVAILABLE',
15 => 'NET_SSH2_DISCONNECT_ILLEGAL_USER_NAME'
);
$this->channel_open_failure_reasons = array(
1 => 'NET_SSH2_OPEN_ADMINISTRATIVELY_PROHIBITED'
);
$this->terminal_modes = array(
0 => 'NET_SSH2_TTY_OP_END'
);
$this->channel_extended_data_type_codes = array(
1 => 'NET_SSH2_EXTENDED_DATA_STDERR'
);
$this->_define_array(
$this->message_numbers,
$this->disconnect_reasons,
$this->channel_open_failure_reasons,
$this->terminal_modes,
$this->channel_extended_data_type_codes,
array(60 => 'NET_SSH2_MSG_USERAUTH_PASSWD_CHANGEREQ'),
array(60 => 'NET_SSH2_MSG_USERAUTH_PK_OK'),
array(60 => 'NET_SSH2_MSG_USERAUTH_INFO_REQUEST',
61 => 'NET_SSH2_MSG_USERAUTH_INFO_RESPONSE'),
// RFC 4419 - diffie-hellman-group-exchange-sha{1,256}
array(30 => 'NET_SSH2_MSG_KEXDH_GEX_REQUEST_OLD',
31 => 'NET_SSH2_MSG_KEXDH_GEX_GROUP',
32 => 'NET_SSH2_MSG_KEXDH_GEX_INIT',
33 => 'NET_SSH2_MSG_KEXDH_GEX_REPLY',
34 => 'NET_SSH2_MSG_KEXDH_GEX_REQUEST'),
// RFC 5656 - Elliptic Curves (for curve25519-sha256@libssh.org)
array(30 => 'NET_SSH2_MSG_KEX_ECDH_INIT',
31 => 'NET_SSH2_MSG_KEX_ECDH_REPLY')
);
if (is_resource($host)) {
$this->fsock = $host;
return;
}
if (is_string($host)) {
$this->host = $host;
$this->port = $port;
$this->timeout = $timeout;
}
}
/**
* Set Crypto Engine Mode
*
* Possible $engine values:
* CRYPT_MODE_INTERNAL, CRYPT_MODE_MCRYPT
*
* @param Integer $engine
* @access private
*/
function setCryptoEngine($engine)
{
$this->crypto_engine = $engine;
}
/**
* Connect to an SSHv2 server
*
* @return Boolean
* @access private
*/
function _connect()
{
if ($this->bitmap & self::MASK_CONSTRUCTOR) {
return false;
}
$this->bitmap |= self::MASK_CONSTRUCTOR;