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<?php
/**
* Pure-PHP implementation of SSHv1.
*
* PHP version 5
*
* Here's a short example of how to use this library:
* <code>
* <?php
* include 'vendor/autoload.php';
*
* $ssh = new \phpseclib\Net\SSH1('www.domain.tld');
* if (!$ssh->login('username', 'password')) {
* exit('Login Failed');
* }
*
* echo $ssh->exec('ls -la');
* ?>
* </code>
*
* Here's another short example:
* <code>
* <?php
* include 'vendor/autoload.php';
*
* $ssh = new \phpseclib\Net\SSH1('www.domain.tld');
* if (!$ssh->login('username', 'password')) {
* exit('Login Failed');
* }
*
* echo $ssh->read('username@username:~$');
* $ssh->write("ls -la\n");
* echo $ssh->read('username@username:~$');
* ?>
* </code>
*
* More information on the SSHv1 specification can be found by reading
* {@link http://www.snailbook.com/docs/protocol-1.5.txt protocol-1.5.txt}.
*
* @category Net
* @package SSH1
* @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 PrestaShop\Module\PsAccounts\Vendor\phpseclib\Net;
use PrestaShop\Module\PsAccounts\Vendor\phpseclib\Crypt\DES;
use PrestaShop\Module\PsAccounts\Vendor\phpseclib\Crypt\Random;
use PrestaShop\Module\PsAccounts\Vendor\phpseclib\Crypt\TripleDES;
use PrestaShop\Module\PsAccounts\Vendor\phpseclib\Math\BigInteger;
/**
* Pure-PHP implementation of SSHv1.
*
* @package SSH1
* @author Jim Wigginton <terrafrost@php.net>
* @access public
*/
class SSH1
{
/**#@+
* Encryption Methods
*
* @see \phpseclib\Net\SSH1::getSupportedCiphers()
* @access public
*/
/**
* No encryption
*
* Not supported.
*/
const CIPHER_NONE = 0;
/**
* IDEA in CFB mode
*
* Not supported.
*/
const CIPHER_IDEA = 1;
/**
* DES in CBC mode
*/
const CIPHER_DES = 2;
/**
* Triple-DES in CBC mode
*
* All implementations are required to support this
*/
const CIPHER_3DES = 3;
/**
* TRI's Simple Stream encryption CBC
*
* Not supported nor is it defined in the official SSH1 specs. OpenSSH, however, does define it (see cipher.h),
* although it doesn't use it (see cipher.c)
*/
const CIPHER_BROKEN_TSS = 4;
/**
* RC4
*
* Not supported.
*
* @internal According to the SSH1 specs:
*
* "The first 16 bytes of the session key are used as the key for
* the server to client direction. The remaining 16 bytes are used
* as the key for the client to server direction. This gives
* independent 128-bit keys for each direction."
*
* This library currently only supports encryption when the same key is being used for both directions. This is
* because there's only one $crypto object. Two could be added ($encrypt and $decrypt, perhaps).
*/
const CIPHER_RC4 = 5;
/**
* Blowfish
*
* Not supported nor is it defined in the official SSH1 specs. OpenSSH, however, defines it (see cipher.h) and
* uses it (see cipher.c)
*/
const CIPHER_BLOWFISH = 6;
/**#@-*/
/**#@+
* Authentication Methods
*
* @see \phpseclib\Net\SSH1::getSupportedAuthentications()
* @access public
*/
/**
* .rhosts or /etc/hosts.equiv
*/
const AUTH_RHOSTS = 1;
/**
* pure RSA authentication
*/
const AUTH_RSA = 2;
/**
* password authentication
*
* This is the only method that is supported by this library.
*/
const AUTH_PASSWORD = 3;
/**
* .rhosts with RSA host authentication
*/
const AUTH_RHOSTS_RSA = 4;
/**#@-*/
/**#@+
* Terminal Modes
*
* @link http://3sp.com/content/developer/maverick-net/docs/Maverick.SSH.PseudoTerminalModesMembers.html
* @access private
*/
const TTY_OP_END = 0;
/**#@-*/
/**
* The Response Type
*
* @see \phpseclib\Net\SSH1::_get_binary_packet()
* @access private
*/
const RESPONSE_TYPE = 1;
/**
* The Response Data
*
* @see \phpseclib\Net\SSH1::_get_binary_packet()
* @access private
*/
const RESPONSE_DATA = 2;
/**#@+
* Execution Bitmap Masks
*
* @see \phpseclib\Net\SSH1::bitmap
* @access private
*/
const MASK_CONSTRUCTOR = 0x1;
const MASK_CONNECTED = 0x2;
const MASK_LOGIN = 0x4;
const MASK_SHELL = 0x8;
/**#@-*/
/**#@+
* @access public
* @see \phpseclib\Net\SSH1::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;
/**
* Make sure that the log never gets larger than this
*/
const LOG_MAX_SIZE = 1048576;
// 1024 * 1024
/**#@-*/
/**#@+
* @access public
* @see \phpseclib\Net\SSH1::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;
/**#@-*/
/**
* The SSH identifier
*
* @var string
* @access private
*/
var $identifier = 'SSH-1.5-phpseclib';
/**
* The Socket Object
*
* @var object
* @access private
*/
var $fsock;
/**
* The cryptography object
*
* @var object
* @access private
*/
var $crypto = \false;
/**
* Execution Bitmap
*
* The bits that are set 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 int
* @access private
*/
var $bitmap = 0;
/**
* The Server Key Public Exponent
*
* Logged for debug purposes
*
* @see self::getServerKeyPublicExponent()
* @var string
* @access private
*/
var $server_key_public_exponent;
/**
* The Server Key Public Modulus
*
* Logged for debug purposes
*
* @see self::getServerKeyPublicModulus()
* @var string
* @access private
*/
var $server_key_public_modulus;
/**
* The Host Key Public Exponent
*
* Logged for debug purposes
*
* @see self::getHostKeyPublicExponent()
* @var string
* @access private
*/
var $host_key_public_exponent;
/**
* The Host Key Public Modulus
*
* Logged for debug purposes
*
* @see self::getHostKeyPublicModulus()
* @var string
* @access private
*/
var $host_key_public_modulus;
/**
* Supported Ciphers
*
* Logged for debug purposes
*
* @see self::getSupportedCiphers()
* @var array
* @access private
*/
var $supported_ciphers = array(self::CIPHER_NONE => 'No encryption', self::CIPHER_IDEA => 'IDEA in CFB mode', self::CIPHER_DES => 'DES in CBC mode', self::CIPHER_3DES => 'Triple-DES in CBC mode', self::CIPHER_BROKEN_TSS => 'TRI\'s Simple Stream encryption CBC', self::CIPHER_RC4 => 'RC4', self::CIPHER_BLOWFISH => 'Blowfish');
/**
* Supported Authentications
*
* Logged for debug purposes
*
* @see self::getSupportedAuthentications()
* @var array
* @access private
*/
var $supported_authentications = array(self::AUTH_RHOSTS => '.rhosts or /etc/hosts.equiv', self::AUTH_RSA => 'pure RSA authentication', self::AUTH_PASSWORD => 'password authentication', self::AUTH_RHOSTS_RSA => '.rhosts with RSA host authentication');
/**
* Server Identification
*
* @see self::getServerIdentification()
* @var string
* @access private
*/
var $server_identification = '';
/**
* Protocol Flags
*
* @see self::__construct()
* @var array
* @access private
*/
var $protocol_flags = array();
/**
* Protocol Flag Log
*
* @see self::getLog()
* @var array
* @access private
*/
var $protocol_flags_log = array();
/**
* Message Log
*
* @see self::getLog()
* @var array
* @access private
*/
var $message_log = array();
/**
* Real-time log file pointer
*
* @see self::_append_log()
* @var resource
* @access private
*/
var $realtime_log_file;
/**
* Real-time log file size
*
* @see self::_append_log()
* @var int
* @access private
*/
var $realtime_log_size;
/**
* Real-time log file wrap boolean
*
* @see self::_append_log()
* @var bool
* @access private
*/
var $realtime_log_wrap;
/**
* Interactive Buffer
*
* @see self::read()
* @var array
* @access private
*/
var $interactiveBuffer = '';
/**
* Current log size
*
* Should never exceed self::LOG_MAX_SIZE
*
* @see self::_send_binary_packet()
* @see self::_get_binary_packet()
* @var int
* @access private
*/
var $log_size;
/**
* Timeout
*
* @see self::setTimeout()
* @access private
*/
var $timeout;
/**
* Current Timeout
*
* @see self::_get_channel_packet()
* @access private
*/
var $curTimeout;
/**
* Log Boundary
*
* @see self::_format_log()
* @access private
*/
var $log_boundary = ':';
/**
* Log Long Width
*
* @see self::_format_log()
* @access private
*/
var $log_long_width = 65;
/**
* Log Short Width
*
* @see self::_format_log()
* @access private
*/
var $log_short_width = 16;
/**
* Hostname
*
* @see self::__construct()
* @see self::_connect()
* @var string
* @access private
*/
var $host;
/**
* Port Number
*
* @see self::__construct()
* @see self::_connect()
* @var int
* @access private
*/
var $port;
/**
* Timeout for initial connection
*
* Set by the constructor call. Calling setTimeout() is optional. If it's not called functions like
* exec() won't timeout unless some PHP setting forces it too. The timeout specified in the constructor,
* however, is non-optional. There will be a timeout, whether or not you set it. If you don't it'll be
* 10 seconds. It is used by fsockopen() in that function.
*
* @see self::__construct()
* @see self::_connect()
* @var int
* @access private
*/
var $connectionTimeout;
/**
* Default cipher
*
* @see self::__construct()
* @see self::_connect()
* @var int
* @access private
*/
var $cipher;
/**
* Default Constructor.
*
* Connects to an SSHv1 server
*
* @param string $host
* @param int $port
* @param int $timeout
* @param int $cipher
* @return \phpseclib\Net\SSH1
* @access public
*/
function __construct($host, $port = 22, $timeout = 10, $cipher = self::CIPHER_3DES)
{
$this->protocol_flags = array(1 => 'NET_SSH1_MSG_DISCONNECT', 2 => 'NET_SSH1_SMSG_PUBLIC_KEY', 3 => 'NET_SSH1_CMSG_SESSION_KEY', 4 => 'NET_SSH1_CMSG_USER', 9 => 'NET_SSH1_CMSG_AUTH_PASSWORD', 10 => 'NET_SSH1_CMSG_REQUEST_PTY', 12 => 'NET_SSH1_CMSG_EXEC_SHELL', 13 => 'NET_SSH1_CMSG_EXEC_CMD', 14 => 'NET_SSH1_SMSG_SUCCESS', 15 => 'NET_SSH1_SMSG_FAILURE', 16 => 'NET_SSH1_CMSG_STDIN_DATA', 17 => 'NET_SSH1_SMSG_STDOUT_DATA', 18 => 'NET_SSH1_SMSG_STDERR_DATA', 19 => 'NET_SSH1_CMSG_EOF', 20 => 'NET_SSH1_SMSG_EXITSTATUS', 33 => 'NET_SSH1_CMSG_EXIT_CONFIRMATION');
$this->_define_array($this->protocol_flags);
$this->host = $host;
$this->port = $port;
$this->connectionTimeout = $timeout;
$this->cipher = $cipher;
}
/**
* Connect to an SSHv1 server
*
* @return bool
* @access private
*/
function _connect()
{
$this->fsock = @\fsockopen($this->host, $this->port, $errno, $errstr, $this->connectionTimeout);
if (!$this->fsock) {
\user_error(\rtrim("Cannot connect to {$this->host}:{$this->port}. Error {$errno}. {$errstr}"));
return \false;
}
$this->server_identification = $init_line = \fgets($this->fsock, 255);
if (\defined('NET_SSH1_LOGGING')) {
$this->_append_log('<-', $this->server_identification);
$this->_append_log('->', $this->identifier . "\r\n");
}
if (!\preg_match('#SSH-([0-9\\.]+)-(.+)#', $init_line, $parts)) {
\user_error('Can only connect to SSH servers');
return \false;
}
if ($parts[1][0] != 1) {
\user_error("Cannot connect to SSH {$parts[1]} servers");
return \false;
}
\fputs($this->fsock, $this->identifier . "\r\n");
$response = $this->_get_binary_packet();
if ($response[self::RESPONSE_TYPE] != NET_SSH1_SMSG_PUBLIC_KEY) {
\user_error('Expected SSH_SMSG_PUBLIC_KEY');
return \false;
}
$anti_spoofing_cookie = $this->_string_shift($response[self::RESPONSE_DATA], 8);
$this->_string_shift($response[self::RESPONSE_DATA], 4);
if (\strlen($response[self::RESPONSE_DATA]) < 2) {
return \false;
}
$temp = \unpack('nlen', $this->_string_shift($response[self::RESPONSE_DATA], 2));
$server_key_public_exponent = new BigInteger($this->_string_shift($response[self::RESPONSE_DATA], \ceil($temp['len'] / 8)), 256);
$this->server_key_public_exponent = $server_key_public_exponent;
if (\strlen($response[self::RESPONSE_DATA]) < 2) {
return \false;
}
$temp = \unpack('nlen', $this->_string_shift($response[self::RESPONSE_DATA], 2));
$server_key_public_modulus = new BigInteger($this->_string_shift($response[self::RESPONSE_DATA], \ceil($temp['len'] / 8)), 256);
$this->server_key_public_modulus = $server_key_public_modulus;
$this->_string_shift($response[self::RESPONSE_DATA], 4);
if (\strlen($response[self::RESPONSE_DATA]) < 2) {
return \false;
}
$temp = \unpack('nlen', $this->_string_shift($response[self::RESPONSE_DATA], 2));
$host_key_public_exponent = new BigInteger($this->_string_shift($response[self::RESPONSE_DATA], \ceil($temp['len'] / 8)), 256);
$this->host_key_public_exponent = $host_key_public_exponent;
if (\strlen($response[self::RESPONSE_DATA]) < 2) {
return \false;
}
$temp = \unpack('nlen', $this->_string_shift($response[self::RESPONSE_DATA], 2));
$host_key_public_modulus = new BigInteger($this->_string_shift($response[self::RESPONSE_DATA], \ceil($temp['len'] / 8)), 256);
$this->host_key_public_modulus = $host_key_public_modulus;
$this->_string_shift($response[self::RESPONSE_DATA], 4);
// get a list of the supported ciphers
if (\strlen($response[self::RESPONSE_DATA]) < 4) {
return \false;
}
\extract(\unpack('Nsupported_ciphers_mask', $this->_string_shift($response[self::RESPONSE_DATA], 4)));
foreach ($this->supported_ciphers as $mask => $name) {
if (($supported_ciphers_mask & 1 << $mask) == 0) {
unset($this->supported_ciphers[$mask]);
}
}
// get a list of the supported authentications
if (\strlen($response[self::RESPONSE_DATA]) < 4) {
return \false;
}
\extract(\unpack('Nsupported_authentications_mask', $this->_string_shift($response[self::RESPONSE_DATA], 4)));
foreach ($this->supported_authentications as $mask => $name) {
if (($supported_authentications_mask & 1 << $mask) == 0) {
unset($this->supported_authentications[$mask]);
}
}
$session_id = \pack('H*', \md5($host_key_public_modulus->toBytes() . $server_key_public_modulus->toBytes() . $anti_spoofing_cookie));
$session_key = Random::string(32);
$double_encrypted_session_key = $session_key ^ \str_pad($session_id, 32, \chr(0));
if ($server_key_public_modulus->compare($host_key_public_modulus) < 0) {
$double_encrypted_session_key = $this->_rsa_crypt($double_encrypted_session_key, array($server_key_public_exponent, $server_key_public_modulus));
$double_encrypted_session_key = $this->_rsa_crypt($double_encrypted_session_key, array($host_key_public_exponent, $host_key_public_modulus));
} else {
$double_encrypted_session_key = $this->_rsa_crypt($double_encrypted_session_key, array($host_key_public_exponent, $host_key_public_modulus));
$double_encrypted_session_key = $this->_rsa_crypt($double_encrypted_session_key, array($server_key_public_exponent, $server_key_public_modulus));
}
$cipher = isset($this->supported_ciphers[$this->cipher]) ? $this->cipher : self::CIPHER_3DES;
$data = \pack('C2a*na*N', NET_SSH1_CMSG_SESSION_KEY, $cipher, $anti_spoofing_cookie, 8 * \strlen($double_encrypted_session_key), $double_encrypted_session_key, 0);
if (!$this->_send_binary_packet($data)) {
\user_error('Error sending SSH_CMSG_SESSION_KEY');
return \false;
}
switch ($cipher) {
//case self::CIPHER_NONE:
// $this->crypto = new \phpseclib\Crypt\Null();
// break;
case self::CIPHER_DES:
$this->crypto = new DES();
$this->crypto->disablePadding();
$this->crypto->enableContinuousBuffer();
$this->crypto->setKey(\substr($session_key, 0, 8));
break;
case self::CIPHER_3DES:
$this->crypto = new TripleDES(TripleDES::MODE_3CBC);
$this->crypto->disablePadding();
$this->crypto->enableContinuousBuffer();
$this->crypto->setKey(\substr($session_key, 0, 24));
break;
}
$response = $this->_get_binary_packet();
if ($response[self::RESPONSE_TYPE] != NET_SSH1_SMSG_SUCCESS) {
\user_error('Expected SSH_SMSG_SUCCESS');
return \false;
}
$this->bitmap = self::MASK_CONNECTED;
return \true;
}
/**
* Login
*
* @param string $username
* @param string $password
* @return bool
* @access public
*/
function login($username, $password = '')
{
if (!($this->bitmap & self::MASK_CONSTRUCTOR)) {
$this->bitmap |= self::MASK_CONSTRUCTOR;
if (!$this->_connect()) {
return \false;
}
}
if (!($this->bitmap & self::MASK_CONNECTED)) {
return \false;
}
$data = \pack('CNa*', NET_SSH1_CMSG_USER, \strlen($username), $username);
if (!$this->_send_binary_packet($data)) {
\user_error('Error sending SSH_CMSG_USER');
return \false;
}
$response = $this->_get_binary_packet();
if ($response === \true) {
return \false;
}
if ($response[self::RESPONSE_TYPE] == NET_SSH1_SMSG_SUCCESS) {
$this->bitmap |= self::MASK_LOGIN;
return \true;
} elseif ($response[self::RESPONSE_TYPE] != NET_SSH1_SMSG_FAILURE) {
\user_error('Expected SSH_SMSG_SUCCESS or SSH_SMSG_FAILURE');
return \false;
}
$data = \pack('CNa*', NET_SSH1_CMSG_AUTH_PASSWORD, \strlen($password), $password);
if (!$this->_send_binary_packet($data)) {
\user_error('Error sending SSH_CMSG_AUTH_PASSWORD');
return \false;
}
// remove the username and password from the last logged packet
if (\defined('NET_SSH1_LOGGING') && NET_SSH1_LOGGING == self::LOG_COMPLEX) {
$data = \pack('CNa*', NET_SSH1_CMSG_AUTH_PASSWORD, \strlen('password'), 'password');
$this->message_log[\count($this->message_log) - 1] = $data;
}
$response = $this->_get_binary_packet();
if ($response === \true) {
return \false;
}
if ($response[self::RESPONSE_TYPE] == NET_SSH1_SMSG_SUCCESS) {
$this->bitmap |= self::MASK_LOGIN;
return \true;
} elseif ($response[self::RESPONSE_TYPE] == NET_SSH1_SMSG_FAILURE) {
return \false;
} else {
\user_error('Expected SSH_SMSG_SUCCESS or SSH_SMSG_FAILURE');
return \false;
}
}
/**
* Set Timeout
*
* $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.
* Setting $timeout to false or 0 will mean there is no timeout.
*
* @param mixed $timeout
*/
function setTimeout($timeout)
{
$this->timeout = $this->curTimeout = $timeout;
}
/**
* Executes a command on a non-interactive shell, returns the output, and quits.
*
* An SSH1 server will close the connection after a command has been executed on a non-interactive shell. SSH2
* servers don't, however, this isn't an SSH2 client. The way this works, on the server, is by initiating a
* shell with the -s option, as discussed in the following links:
*
* {@link http://www.faqs.org/docs/bashman/bashref_65.html http://www.faqs.org/docs/bashman/bashref_65.html}
* {@link http://www.faqs.org/docs/bashman/bashref_62.html http://www.faqs.org/docs/bashman/bashref_62.html}
*
* To execute further commands, a new \phpseclib\Net\SSH1 object will need to be created.
*
* Returns false on failure and the output, otherwise.
*
* @see self::interactiveRead()
* @see self::interactiveWrite()
* @param string $cmd
* @param bool $block
* @return mixed
* @access public
*/
function exec($cmd, $block = \true)
{
if (!($this->bitmap & self::MASK_LOGIN)) {
\user_error('Operation disallowed prior to login()');
return \false;
}
$data = \pack('CNa*', NET_SSH1_CMSG_EXEC_CMD, \strlen($cmd), $cmd);
if (!$this->_send_binary_packet($data)) {
\user_error('Error sending SSH_CMSG_EXEC_CMD');
return \false;
}
if (!$block) {
return \true;
}
$output = '';
$response = $this->_get_binary_packet();
if ($response !== \false) {
do {
$output .= \substr($response[self::RESPONSE_DATA], 4);
$response = $this->_get_binary_packet();
} while (\is_array($response) && $response[self::RESPONSE_TYPE] != NET_SSH1_SMSG_EXITSTATUS);
}
$data = \pack('C', NET_SSH1_CMSG_EXIT_CONFIRMATION);
// i don't think it's really all that important if this packet gets sent or not.
$this->_send_binary_packet($data);
\fclose($this->fsock);
// reset the execution bitmap - a new \phpseclib\Net\SSH1 object needs to be created.
$this->bitmap = 0;
return $output;
}
/**
* Creates an interactive shell
*
* @see self::interactiveRead()
* @see self::interactiveWrite()
* @return bool
* @access private
*/
function _initShell()
{
// connect using the sample parameters in protocol-1.5.txt.
// according to wikipedia.org's entry on text terminals, "the fundamental type of application running on a text
// terminal is a command line interpreter or shell". thus, opening a terminal session to run the shell.
$data = \pack('CNa*N4C', NET_SSH1_CMSG_REQUEST_PTY, \strlen('vt100'), 'vt100', 24, 80, 0, 0, self::TTY_OP_END);
if (!$this->_send_binary_packet($data)) {
\user_error('Error sending SSH_CMSG_REQUEST_PTY');
return \false;
}
$response = $this->_get_binary_packet();
if ($response === \true) {
return \false;
}
if ($response[self::RESPONSE_TYPE] != NET_SSH1_SMSG_SUCCESS) {
\user_error('Expected SSH_SMSG_SUCCESS');
return \false;
}
$data = \pack('C', NET_SSH1_CMSG_EXEC_SHELL);
if (!$this->_send_binary_packet($data)) {
\user_error('Error sending SSH_CMSG_EXEC_SHELL');
return \false;
}
$this->bitmap |= self::MASK_SHELL;
//stream_set_blocking($this->fsock, 0);
return \true;
}
/**
* Inputs a command into an interactive shell.
*
* @see self::interactiveWrite()
* @param string $cmd
* @return bool
* @access public
*/
function write($cmd)
{
return $this->interactiveWrite($cmd);
}
/**
* Returns the output of an interactive shell when there's a match for $expect
*
* $expect can take the form of a string literal or, if $mode == self::READ_REGEX,
* a regular expression.
*
* @see self::write()
* @param string $expect
* @param int $mode
* @return bool
* @access public
*/
function read($expect, $mode = self::READ_SIMPLE)
{
if (!($this->bitmap & self::MASK_LOGIN)) {
\user_error('Operation disallowed prior to login()');
return \false;
}
if (!($this->bitmap & self::MASK_SHELL) && !$this->_initShell()) {
\user_error('Unable to initiate an interactive shell session');
return \false;
}
$match = $expect;
while (\true) {
if ($mode == self::READ_REGEX) {
\preg_match($expect, $this->interactiveBuffer, $matches);
$match = isset($matches[0]) ? $matches[0] : '';
}
$pos = \strlen($match) ? \strpos($this->interactiveBuffer, $match) : \false;
if ($pos !== \false) {
return $this->_string_shift($this->interactiveBuffer, $pos + \strlen($match));
}
$response = $this->_get_binary_packet();
if ($response === \true) {
return $this->_string_shift($this->interactiveBuffer, \strlen($this->interactiveBuffer));
}
$this->interactiveBuffer .= \substr($response[self::RESPONSE_DATA], 4);
}
}
/**
* Inputs a command into an interactive shell.
*
* @see self::interactiveRead()
* @param string $cmd
* @return bool
* @access public
*/
function interactiveWrite($cmd)
{
if (!($this->bitmap & self::MASK_LOGIN)) {
\user_error('Operation disallowed prior to login()');
return \false;
}
if (!($this->bitmap & self::MASK_SHELL) && !$this->_initShell()) {
\user_error('Unable to initiate an interactive shell session');
return \false;
}
$data = \pack('CNa*', NET_SSH1_CMSG_STDIN_DATA, \strlen($cmd), $cmd);
if (!$this->_send_binary_packet($data)) {
\user_error('Error sending SSH_CMSG_STDIN');
return \false;
}
return \true;
}
/**
* Returns the output of an interactive shell when no more output is available.
*
* Requires PHP 4.3.0 or later due to the use of the stream_select() function. If you see stuff like
* "^[[00m", you're seeing ANSI escape codes. According to
* {@link http://support.microsoft.com/kb/101875 How to Enable ANSI.SYS in a Command Window}, "Windows NT
* does not support ANSI escape sequences in Win32 Console applications", so if you're a Windows user,
* there's not going to be much recourse.
*
* @see self::interactiveRead()
* @return string
* @access public
*/
function interactiveRead()
{
if (!($this->bitmap & self::MASK_LOGIN)) {
\user_error('Operation disallowed prior to login()');
return \false;
}
if (!($this->bitmap & self::MASK_SHELL) && !$this->_initShell()) {
\user_error('Unable to initiate an interactive shell session');
return \false;
}
$read = array($this->fsock);
$write = $except = null;
if (\stream_select($read, $write, $except, 0)) {
$response = $this->_get_binary_packet();
return \substr($response[self::RESPONSE_DATA], 4);
} else {
return '';
}
}
/**
* Disconnect
*
* @access public
*/
function disconnect()
{
$this->_disconnect();
}
/**
* Destructor.
*
* Will be called, automatically, if you're supporting just PHP5. If you're supporting PHP4, you'll need to call
* disconnect().
*
* @access public
*/
function __destruct()
{
$this->_disconnect();
}
/**
* Disconnect
*
* @param string $msg
* @access private
*/
function _disconnect($msg = 'Client Quit')
{
if ($this->bitmap) {
$data = \pack('C', NET_SSH1_CMSG_EOF);
$this->_send_binary_packet($data);
/*
$response = $this->_get_binary_packet();
if ($response === true) {
$response = array(self::RESPONSE_TYPE => -1);
}
switch ($response[self::RESPONSE_TYPE]) {
case NET_SSH1_SMSG_EXITSTATUS:
$data = pack('C', NET_SSH1_CMSG_EXIT_CONFIRMATION);
break;
default:
$data = pack('CNa*', NET_SSH1_MSG_DISCONNECT, strlen($msg), $msg);
}
*/
$data = \pack('CNa*', NET_SSH1_MSG_DISCONNECT, \strlen($msg), $msg);
$this->_send_binary_packet($data);
\fclose($this->fsock);
$this->bitmap = 0;
}
}
/**
* Gets Binary Packets
*
* See 'The Binary Packet Protocol' of protocol-1.5.txt for more info.
*
* Also, this function could be improved upon by adding detection for the following exploit:
* http://www.securiteam.com/securitynews/5LP042K3FY.html
*
* @see self::_send_binary_packet()
* @return array
* @access private
*/
function _get_binary_packet()
{
if (\feof($this->fsock)) {
//user_error('connection closed prematurely');
return \false;
}
if ($this->curTimeout) {
$read = array($this->fsock);
$write = $except = null;
$start = \strtok(\microtime(), ' ') + \strtok('');
// http://php.net/microtime#61838
$sec = \floor($this->curTimeout);
$usec = 1000000 * ($this->curTimeout - $sec);
// on windows this returns a "Warning: Invalid CRT parameters detected" error
if (!@\stream_select($read, $write, $except, $sec, $usec) && !\count($read)) {
//$this->_disconnect('Timeout');
return \true;
}
$elapsed = \strtok(\microtime(), ' ') + \strtok('') - $start;
$this->curTimeout -= $elapsed;
}
$start = \strtok(\microtime(), ' ') + \strtok('');
// http://php.net/microtime#61838
$data = \fread($this->fsock, 4);
if (\strlen($data) < 4) {
return \false;
}
$temp = \unpack('Nlength', $data);
$padding_length = 8 - ($temp['length'] & 7);
$length = $temp['length'] + $padding_length;
$raw = '';
while ($length > 0) {
$temp = \fread($this->fsock, $length);
if (\strlen($temp) != $length) {
return \false;
}
$raw .= $temp;
$length -= \strlen($temp);
}
$stop = \strtok(\microtime(), ' ') + \strtok('');
if (\strlen($raw) && $this->crypto !== \false) {
$raw = $this->crypto->decrypt($raw);
}
$padding = \substr($raw, 0, $padding_length);
$type = $raw[$padding_length];
$data = \substr($raw, $padding_length + 1, -4);
if (\strlen($raw) < 4) {
return \false;
}
$temp = \unpack('Ncrc', \substr($raw, -4));
//if ( $temp['crc'] != $this->_crc($padding . $type . $data) ) {
// user_error('Bad CRC in packet from server');
// return false;
//}
$type = \ord($type);
if (\defined('NET_SSH1_LOGGING')) {
$temp = isset($this->protocol_flags[$type]) ? $this->protocol_flags[$type] : 'UNKNOWN';
$temp = '<- ' . $temp . ' (' . \round($stop - $start, 4) . 's)';
$this->_append_log($temp, $data);
}
return array(self::RESPONSE_TYPE => $type, self::RESPONSE_DATA => $data);
}
/**
* Sends Binary Packets
*
* Returns true on success, false on failure.
*
* @see self::_get_binary_packet()
* @param string $data
* @return bool
* @access private
*/
function _send_binary_packet($data)
{
if (\feof($this->fsock)) {
//user_error('connection closed prematurely');
return \false;
}
$length = \strlen($data) + 4;
$padding = Random::string(8 - ($length & 7));
$orig = $data;
$data = $padding . $data;
$data .= \pack('N', $this->_crc($data));
if ($this->crypto !== \false) {
$data = $this->crypto->encrypt($data);
}
$packet = \pack('Na*', $length, $data);
$start = \strtok(\microtime(), ' ') + \strtok('');
// http://php.net/microtime#61838
$result = \strlen($packet) == \fputs($this->fsock, $packet);
$stop = \strtok(\microtime(), ' ') + \strtok('');
if (\defined('NET_SSH1_LOGGING')) {
$temp = isset($this->protocol_flags[\ord($orig[0])]) ? $this->protocol_flags[\ord($orig[0])] : 'UNKNOWN';
$temp = '-> ' . $temp . ' (' . \round($stop - $start, 4) . 's)';
$this->_append_log($temp, $orig);
}
return $result;
}
/**
* Cyclic Redundancy Check (CRC)
*
* PHP's crc32 function is implemented slightly differently than the one that SSH v1 uses, so
* we've reimplemented it. A more detailed discussion of the differences can be found after
* $crc_lookup_table's initialization.
*
* @see self::_get_binary_packet()
* @see self::_send_binary_packet()
* @param string $data
* @return int
* @access private
*/
function _crc($data)
{
static $crc_lookup_table = array(0x0, 0x77073096, 0xee0e612c, 0x990951ba, 0x76dc419, 0x706af48f, 0xe963a535, 0x9e6495a3, 0xedb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988, 0x9b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91, 0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de, 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7, 0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9, 0xfa0f3d63, 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172, 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b, 0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940, 0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59, 0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423, 0xcfba9599, 0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924, 0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, 0x76dc4190, 0x1db7106, 0x98d220bc, 0xefd5102a, 0x71b18589, 0x6b6b51f, 0x9fbfe4a5, 0xe8b8d433, 0x7807c9a2, 0xf00f934, 0x9609a88e, 0xe10e9818, 0x7f6a0dbb, 0x86d3d2d, 0x91646c97, 0xe6635c01, 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e, 0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950, 0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65, 0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, 0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0, 0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa, 0xbe0b1010, 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f, 0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17, 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6, 0x3b6e20c, 0x74b1d29a, 0xead54739, 0x9dd277af, 0x4db2615, 0x73dc1683, 0xe3630b12, 0x94643b84, 0xd6d6a3e, 0x7a6a5aa8, 0xe40ecf0b, 0x9309ff9d, 0xa00ae27, 0x7d079eb1, 0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb, 0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc, 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5, 0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252, 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b, 0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55, 0x316e8eef, 0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236, 0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe, 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d, 0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x26d930a, 0x9c0906a9, 0xeb0e363f, 0x72076785, 0x5005713, 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0xcb61b38, 0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0xbdbdf21, 0x86d3d2d4, 0xf1d4e242, 0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777, 0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, 0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45, 0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2, 0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc, 0x40df0b66, 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9, 0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605, 0xcdd70693, 0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94, 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d);
// For this function to yield the same output as PHP's crc32 function, $crc would have to be
// set to 0xFFFFFFFF, initially - not 0x00000000 as it currently is.
$crc = 0x0;
$length = \strlen($data);
for ($i = 0; $i < $length; $i++) {
// We AND $crc >> 8 with 0x00FFFFFF because we want the eight newly added bits to all
// be zero. PHP, unfortunately, doesn't always do this. 0x80000000 >> 8, as an example,
// yields 0xFF800000 - not 0x00800000. The following link elaborates:
// http://www.php.net/manual/en/language.operators.bitwise.php#57281
$crc = $crc >> 8 & 0xffffff ^ $crc_lookup_table[$crc & 0xff ^ \ord($data[$i])];
}
// In addition to having to set $crc to 0xFFFFFFFF, initially, the return value must be XOR'd with
// 0xFFFFFFFF for this function to return the same thing that PHP's crc32 function would.
return $crc;
}
/**
* String Shift
*
* Inspired by array_shift
*
* @param string $string
* @param int $index
* @return string
* @access private
*/
function _string_shift(&$string, $index = 1)
{
$substr = \substr($string, 0, $index);
$string = \substr($string, $index);
return $substr;
}
/**
* RSA Encrypt
*
* Returns mod(pow($m, $e), $n), where $n should be the product of two (large) primes $p and $q and where $e
* should be a number with the property that gcd($e, ($p - 1) * ($q - 1)) == 1. Could just make anything that
* calls this call modexp, instead, but I think this makes things clearer, maybe...
*
* @see self::__construct()
* @param BigInteger $m
* @param array $key
* @return BigInteger
* @access private
*/
function _rsa_crypt($m, $key)
{
/*
$rsa = new RSA();
$rsa->loadKey($key, RSA::PUBLIC_FORMAT_RAW);
$rsa->setEncryptionMode(RSA::ENCRYPTION_PKCS1);
return $rsa->encrypt($m);
*/
// To quote from protocol-1.5.txt:
// The most significant byte (which is only partial as the value must be
// less than the public modulus, which is never a power of two) is zero.
//
// The next byte contains the value 2 (which stands for public-key
// encrypted data in the PKCS standard [PKCS#1]). Then, there are non-
// zero random bytes to fill any unused space, a zero byte, and the data
// to be encrypted in the least significant bytes, the last byte of the
// data in the least significant byte.
// Presumably the part of PKCS#1 they're refering to is "Section 7.2.1 Encryption Operation",
// under "7.2 RSAES-PKCS1-v1.5" and "7 Encryption schemes" of the following URL:
// ftp://ftp.rsasecurity.com/pub/pkcs/pkcs-1/pkcs-1v2-1.pdf
$modulus = $key[1]->toBytes();
$length = \strlen($modulus) - \strlen($m) - 3;
$random = '';
while (\strlen($random) != $length) {
$block = Random::string($length - \strlen($random));
$block = \str_replace("\x00", '', $block);
$random .= $block;
}
$temp = \chr(0) . \chr(2) . $random . \chr(0) . $m;
$m = new BigInteger($temp, 256);
$m = $m->modPow($key[0], $key[1]);
return $m->toBytes();
}
/**
* Define Array
*
* Takes any number of arrays whose indices are integers and whose values are strings and defines a bunch of
* named constants from it, using the value as the name of the constant and the index as the value of the constant.
* If any of the constants that would be defined already exists, none of the constants will be defined.
*
* @access private
*/
function _define_array()
{
$args = \func_get_args();
foreach ($args as $arg) {
foreach ($arg as $key => $value) {
if (!\defined($value)) {
\define($value, $key);
} else {
break 2;
}
}
}
}
/**
* Returns a log of the packets that have been sent and received.
*
* Returns a string if NET_SSH1_LOGGING == self::LOG_COMPLEX, an array if NET_SSH1_LOGGING == self::LOG_SIMPLE and false if !defined('NET_SSH1_LOGGING')
*
* @access public
* @return array|false|string
*/
function getLog()
{
if (!\defined('NET_SSH1_LOGGING')) {
return \false;
}
switch (NET_SSH1_LOGGING) {
case self::LOG_SIMPLE:
return $this->protocol_flags_log;
break;
case self::LOG_COMPLEX:
return $this->_format_log($this->message_log, $this->protocol_flags_log);
break;
default:
return \false;
}
}
/**
* Formats a log for printing
*
* @param array $message_log
* @param array $message_number_log
* @access private
* @return string
*/
function _format_log($message_log, $message_number_log)
{
$output = '';
for ($i = 0; $i < \count($message_log); $i++) {
$output .= $message_number_log[$i] . "\r\n";
$current_log = $message_log[$i];
$j = 0;
do {
if (\strlen($current_log)) {
$output .= \str_pad(\dechex($j), 7, '0', \STR_PAD_LEFT) . '0 ';
}
$fragment = $this->_string_shift($current_log, $this->log_short_width);
$hex = \substr(\preg_replace_callback('#.#s', array($this, '_format_log_helper'), $fragment), \strlen($this->log_boundary));
// replace non ASCII printable characters with dots
// http://en.wikipedia.org/wiki/ASCII#ASCII_printable_characters
// also replace < with a . since < messes up the output on web browsers
$raw = \preg_replace('#[^\\x20-\\x7E]|<#', '.', $fragment);
$output .= \str_pad($hex, $this->log_long_width - $this->log_short_width, ' ') . $raw . "\r\n";
$j++;
} while (\strlen($current_log));
$output .= "\r\n";
}
return $output;
}
/**
* Helper function for _format_log
*
* For use with preg_replace_callback()
*
* @param array $matches
* @access private
* @return string
*/
function _format_log_helper($matches)
{
return $this->log_boundary . \str_pad(\dechex(\ord($matches[0])), 2, '0', \STR_PAD_LEFT);
}
/**
* Return the server key public exponent
*
* Returns, by default, the base-10 representation. If $raw_output is set to true, returns, instead,
* the raw bytes. This behavior is similar to PHP's md5() function.
*
* @param bool $raw_output
* @return string
* @access public
*/
function getServerKeyPublicExponent($raw_output = \false)
{
return $raw_output ? $this->server_key_public_exponent->toBytes() : $this->server_key_public_exponent->toString();
}
/**
* Return the server key public modulus
*
* Returns, by default, the base-10 representation. If $raw_output is set to true, returns, instead,
* the raw bytes. This behavior is similar to PHP's md5() function.
*
* @param bool $raw_output
* @return string
* @access public
*/
function getServerKeyPublicModulus($raw_output = \false)
{
return $raw_output ? $this->server_key_public_modulus->toBytes() : $this->server_key_public_modulus->toString();
}
/**
* Return the host key public exponent
*
* Returns, by default, the base-10 representation. If $raw_output is set to true, returns, instead,
* the raw bytes. This behavior is similar to PHP's md5() function.
*
* @param bool $raw_output
* @return string
* @access public
*/
function getHostKeyPublicExponent($raw_output = \false)
{
return $raw_output ? $this->host_key_public_exponent->toBytes() : $this->host_key_public_exponent->toString();
}
/**
* Return the host key public modulus
*
* Returns, by default, the base-10 representation. If $raw_output is set to true, returns, instead,
* the raw bytes. This behavior is similar to PHP's md5() function.
*
* @param bool $raw_output
* @return string
* @access public
*/
function getHostKeyPublicModulus($raw_output = \false)
{
return $raw_output ? $this->host_key_public_modulus->toBytes() : $this->host_key_public_modulus->toString();
}
/**
* Return a list of ciphers supported by SSH1 server.
*
* Just because a cipher is supported by an SSH1 server doesn't mean it's supported by this library. If $raw_output
* is set to true, returns, instead, an array of constants. ie. instead of array('Triple-DES in CBC mode'), you'll
* get array(self::CIPHER_3DES).
*
* @param bool $raw_output
* @return array
* @access public
*/
function getSupportedCiphers($raw_output = \false)
{
return $raw_output ? \array_keys($this->supported_ciphers) : \array_values($this->supported_ciphers);
}
/**
* Return a list of authentications supported by SSH1 server.
*
* Just because a cipher is supported by an SSH1 server doesn't mean it's supported by this library. If $raw_output
* is set to true, returns, instead, an array of constants. ie. instead of array('password authentication'), you'll
* get array(self::AUTH_PASSWORD).
*
* @param bool $raw_output
* @return array
* @access public
*/
function getSupportedAuthentications($raw_output = \false)
{
return $raw_output ? \array_keys($this->supported_authentications) : \array_values($this->supported_authentications);
}
/**
* Return the server identification.
*
* @return string
* @access public
*/
function getServerIdentification()
{
return \rtrim($this->server_identification);
}
/**
* Logs data packets
*
* Makes sure that only the last 1MB worth of packets will be logged
*
* @param int $protocol_flags
* @param string $message
* @access private
*/
function _append_log($protocol_flags, $message)
{
switch (NET_SSH1_LOGGING) {
// useful for benchmarks
case self::LOG_SIMPLE:
$this->protocol_flags_log[] = $protocol_flags;
break;
// the most useful log for SSH1
case self::LOG_COMPLEX:
$this->protocol_flags_log[] = $protocol_flags;
$this->_string_shift($message);
$this->log_size += \strlen($message);
$this->message_log[] = $message;
while ($this->log_size > self::LOG_MAX_SIZE) {
$this->log_size -= \strlen(\array_shift($this->message_log));
\array_shift($this->protocol_flags_log);
}
break;
// dump the output out realtime; packets may be interspersed with non packets,
// passwords won't be filtered out and select other packets may not be correctly
// identified
case self::LOG_REALTIME:
echo "<pre>\r\n" . $this->_format_log(array($message), array($protocol_flags)) . "\r\n</pre>\r\n";
@\flush();
@\ob_flush();
break;
// basically the same thing as self::LOG_REALTIME with the caveat that self::LOG_REALTIME_FILE
// needs to be defined and that the resultant log file will be capped out at self::LOG_MAX_SIZE.
// the earliest part of the log file is denoted by the first <<< START >>> and is not going to necessarily
// at the beginning of the file
case self::LOG_REALTIME_FILE:
if (!isset($this->realtime_log_file)) {
// PHP doesn't seem to like using constants in fopen()
$filename = self::LOG_REALTIME_FILE;
$fp = \fopen($filename, 'w');
$this->realtime_log_file = $fp;
}
if (!\is_resource($this->realtime_log_file)) {
break;
}
$entry = $this->_format_log(array($message), array($protocol_flags));
if ($this->realtime_log_wrap) {
$temp = "<<< START >>>\r\n";
$entry .= $temp;
\fseek($this->realtime_log_file, \ftell($this->realtime_log_file) - \strlen($temp));
}
$this->realtime_log_size += \strlen($entry);
if ($this->realtime_log_size > self::LOG_MAX_SIZE) {
\fseek($this->realtime_log_file, 0);
$this->realtime_log_size = \strlen($entry);
$this->realtime_log_wrap = \true;
}
\fputs($this->realtime_log_file, $entry);
}
}
}