<?php | |
/** | |
* Pure-PHP implementation of SSHv1. | |
* | |
* PHP versions 4 and 5 | |
* | |
* Here's a short example of how to use this library: | |
* <code> | |
* <?php | |
* include 'Net/SSH1.php'; | |
* | |
* $ssh = new Net_SSH1('www.domain.tld'); | |
* if (!$ssh->login('username', 'password')) { | |
* exit('Login Failed'); | |
* } | |
* | |
* echo $ssh->exec('ls -la'); | |
* ?> | |
* </code> | |
* | |
* Here's another short example: | |
* <code> | |
* <?php | |
* include 'Net/SSH1.php'; | |
* | |
* $ssh = new Net_SSH1('www.domain.tld'); | |
* if (!$ssh->login('username', 'password')) { | |
* exit('Login Failed'); | |
* } | |
* | |
* echo $ssh->read('username@username:~$'); | |
* $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}. | |
* | |
* LICENSE: Permission is hereby granted, free of charge, to any person obtaining a copy | |
* of this software and associated documentation files (the "Software"), to deal | |
* in the Software without restriction, including without limitation the rights | |
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
* copies of the Software, and to permit persons to whom the Software is | |
* furnished to do so, subject to the following conditions: | |
* | |
* The above copyright notice and this permission notice shall be included in | |
* all copies or substantial portions of the Software. | |
* | |
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | |
* THE SOFTWARE. | |
* | |
* @category Net | |
* @package Net_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 | |
*/ | |
/**#@+ | |
* Encryption Methods | |
* | |
* @see self::getSupportedCiphers() | |
* @access public | |
*/ | |
/** | |
* No encryption | |
* | |
* Not supported. | |
*/ | |
define('NET_SSH1_CIPHER_NONE', 0); | |
/** | |
* IDEA in CFB mode | |
* | |
* Not supported. | |
*/ | |
define('NET_SSH1_CIPHER_IDEA', 1); | |
/** | |
* DES in CBC mode | |
*/ | |
define('NET_SSH1_CIPHER_DES', 2); | |
/** | |
* Triple-DES in CBC mode | |
* | |
* All implementations are required to support this | |
*/ | |
define('NET_SSH1_CIPHER_3DES', 3); | |
/** | |
* TRI's Simple Stream encryption CBC | |
* | |
* Not supported nor is it defined in the official SSH1 specs. OpenSSH, however, does define it (see cipher.h), | |
* although it doesn't use it (see cipher.c) | |
*/ | |
define('NET_SSH1_CIPHER_BROKEN_TSS', 4); | |
/** | |
* RC4 | |
* | |
* Not supported. | |
* | |
* @internal According to the SSH1 specs: | |
* | |
* "The first 16 bytes of the session key are used as the key for | |
* the server to client direction. The remaining 16 bytes are used | |
* as the key for the client to server direction. This gives | |
* independent 128-bit keys for each direction." | |
* | |
* This library currently only supports encryption when the same key is being used for both directions. This is | |
* because there's only one $crypto object. Two could be added ($encrypt and $decrypt, perhaps). | |
*/ | |
define('NET_SSH1_CIPHER_RC4', 5); | |
/** | |
* Blowfish | |
* | |
* Not supported nor is it defined in the official SSH1 specs. OpenSSH, however, defines it (see cipher.h) and | |
* uses it (see cipher.c) | |
*/ | |
define('NET_SSH1_CIPHER_BLOWFISH', 6); | |
/**#@-*/ | |
/**#@+ | |
* Authentication Methods | |
* | |
* @see self::getSupportedAuthentications() | |
* @access public | |
*/ | |
/** | |
* .rhosts or /etc/hosts.equiv | |
*/ | |
define('NET_SSH1_AUTH_RHOSTS', 1); | |
/** | |
* pure RSA authentication | |
*/ | |
define('NET_SSH1_AUTH_RSA', 2); | |
/** | |
* password authentication | |
* | |
* This is the only method that is supported by this library. | |
*/ | |
define('NET_SSH1_AUTH_PASSWORD', 3); | |
/** | |
* .rhosts with RSA host authentication | |
*/ | |
define('NET_SSH1_AUTH_RHOSTS_RSA', 4); | |
/**#@-*/ | |
/**#@+ | |
* Terminal Modes | |
* | |
* @link http://3sp.com/content/developer/maverick-net/docs/Maverick.SSH.PseudoTerminalModesMembers.html | |
* @access private | |
*/ | |
define('NET_SSH1_TTY_OP_END', 0); | |
/**#@-*/ | |
/** | |
* The Response Type | |
* | |
* @see self::_get_binary_packet() | |
* @access private | |
*/ | |
define('NET_SSH1_RESPONSE_TYPE', 1); | |
/** | |
* The Response Data | |
* | |
* @see self::_get_binary_packet() | |
* @access private | |
*/ | |
define('NET_SSH1_RESPONSE_DATA', 2); | |
/**#@+ | |
* Execution Bitmap Masks | |
* | |
* @see self::bitmap | |
* @access private | |
*/ | |
define('NET_SSH1_MASK_CONSTRUCTOR', 0x00000001); | |
define('NET_SSH1_MASK_CONNECTED', 0x00000002); | |
define('NET_SSH1_MASK_LOGIN', 0x00000004); | |
define('NET_SSH1_MASK_SHELL', 0x00000008); | |
/**#@-*/ | |
/**#@+ | |
* @access public | |
* @see self::getLog() | |
*/ | |
/** | |
* Returns the message numbers | |
*/ | |
define('NET_SSH1_LOG_SIMPLE', 1); | |
/** | |
* Returns the message content | |
*/ | |
define('NET_SSH1_LOG_COMPLEX', 2); | |
/** | |
* Outputs the content real-time | |
*/ | |
define('NET_SSH1_LOG_REALTIME', 3); | |
/** | |
* Dumps the content real-time to a file | |
*/ | |
define('NET_SSH1_LOG_REALTIME_FILE', 4); | |
/**#@-*/ | |
/**#@+ | |
* @access public | |
* @see self::read() | |
*/ | |
/** | |
* Returns when a string matching $expect exactly is found | |
*/ | |
define('NET_SSH1_READ_SIMPLE', 1); | |
/** | |
* Returns when a string matching the regular expression $expect is found | |
*/ | |
define('NET_SSH1_READ_REGEX', 2); | |
/**#@-*/ | |
/** | |
* Pure-PHP implementation of SSHv1. | |
* | |
* @package Net_SSH1 | |
* @author Jim Wigginton <terrafrost@php.net> | |
* @access public | |
*/ | |
class Net_SSH1 | |
{ | |
/** | |
* The SSH identifier | |
* | |
* @var string | |
* @access private | |
*/ | |
var $identifier = 'SSH-1.5-phpseclib'; | |
/** | |
* The Socket Object | |
* | |
* @var object | |
* @access private | |
*/ | |
var $fsock; | |
/** | |
* The cryptography object | |
* | |
* @var object | |
* @access private | |
*/ | |
var $crypto = false; | |
/** | |
* Execution Bitmap | |
* | |
* The bits that are set 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( | |
NET_SSH1_CIPHER_NONE => 'No encryption', | |
NET_SSH1_CIPHER_IDEA => 'IDEA in CFB mode', | |
NET_SSH1_CIPHER_DES => 'DES in CBC mode', | |
NET_SSH1_CIPHER_3DES => 'Triple-DES in CBC mode', | |
NET_SSH1_CIPHER_BROKEN_TSS => 'TRI\'s Simple Stream encryption CBC', | |
NET_SSH1_CIPHER_RC4 => 'RC4', | |
NET_SSH1_CIPHER_BLOWFISH => 'Blowfish' | |
); | |
/** | |
* Supported Authentications | |
* | |
* Logged for debug purposes | |
* | |
* @see self::getSupportedAuthentications() | |
* @var array | |
* @access private | |
*/ | |
var $supported_authentications = array( | |
NET_SSH1_AUTH_RHOSTS => '.rhosts or /etc/hosts.equiv', | |
NET_SSH1_AUTH_RSA => 'pure RSA authentication', | |
NET_SSH1_AUTH_PASSWORD => 'password authentication', | |
NET_SSH1_AUTH_RHOSTS_RSA => '.rhosts with RSA host authentication' | |
); | |
/** | |
* Server Identification | |
* | |
* @see self::getServerIdentification() | |
* @var string | |
* @access private | |
*/ | |
var $server_identification = ''; | |
/** | |
* Protocol Flags | |
* | |
* @see self::Net_SSH1() | |
* @var array | |
* @access private | |
*/ | |
var $protocol_flags = array(); | |
/** | |
* Protocol Flag Log | |
* | |
* @see self::getLog() | |
* @var array | |
* @access private | |
*/ | |
var $protocol_flag_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 = ''; | |
/** | |
* 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::Net_SSH1() | |
* @see self::_connect() | |
* @var string | |
* @access private | |
*/ | |
var $host; | |
/** | |
* Port Number | |
* | |
* @see self::Net_SSH1() | |
* @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::Net_SSH1() | |
* @see self::_connect() | |
* @var int | |
* @access private | |
*/ | |
var $connectionTimeout; | |
/** | |
* Default cipher | |
* | |
* @see self::Net_SSH1() | |
* @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 $cipher | |
* @return Net_SSH1 | |
* @access public | |
*/ | |
function __construct($host, $port = 22, $timeout = 10, $cipher = NET_SSH1_CIPHER_3DES) | |
{ | |
if (!class_exists('Math_BigInteger')) { | |
include_once 'Math/BigInteger.php'; | |
} | |
// Include Crypt_Random | |
// the class_exists() will only be called if the crypt_random_string function hasn't been defined and | |
// will trigger a call to __autoload() if you're wanting to auto-load classes | |
// call function_exists() a second time to stop the include_once from being called outside | |
// of the auto loader | |
if (!function_exists('crypt_random_string') && !class_exists('Crypt_Random') && !function_exists('crypt_random_string')) { | |
include_once 'Crypt/Random.php'; | |
} | |
$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; | |
} | |
/** | |
* PHP4 compatible Default Constructor. | |
* | |
* @see self::__construct() | |
* @param string $host | |
* @param int $port | |
* @param int $timeout | |
* @param int $cipher | |
* @access public | |
*/ | |
function Net_SSH1($host, $port = 22, $timeout = 10, $cipher = NET_SSH1_CIPHER_3DES) | |
{ | |
$this->__construct($host, $port, $timeout, $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[NET_SSH1_RESPONSE_TYPE] != NET_SSH1_SMSG_PUBLIC_KEY) { | |
user_error('Expected SSH_SMSG_PUBLIC_KEY'); | |
return false; | |
} | |
$anti_spoofing_cookie = $this->_string_shift($response[NET_SSH1_RESPONSE_DATA], 8); | |
$this->_string_shift($response[NET_SSH1_RESPONSE_DATA], 4); | |
if (strlen($response[NET_SSH1_RESPONSE_DATA]) < 2) { | |
return false; | |
} | |
$temp = unpack('nlen', $this->_string_shift($response[NET_SSH1_RESPONSE_DATA], 2)); | |
$server_key_public_exponent = new Math_BigInteger($this->_string_shift($response[NET_SSH1_RESPONSE_DATA], ceil($temp['len'] / 8)), 256); | |
$this->server_key_public_exponent = $server_key_public_exponent; | |
if (strlen($response[NET_SSH1_RESPONSE_DATA]) < 2) { | |
return false; | |
} | |
$temp = unpack('nlen', $this->_string_shift($response[NET_SSH1_RESPONSE_DATA], 2)); | |
$server_key_public_modulus = new Math_BigInteger($this->_string_shift($response[NET_SSH1_RESPONSE_DATA], ceil($temp['len'] / 8)), 256); | |
$this->server_key_public_modulus = $server_key_public_modulus; | |
$this->_string_shift($response[NET_SSH1_RESPONSE_DATA], 4); | |
if (strlen($response[NET_SSH1_RESPONSE_DATA]) < 2) { | |
return false; | |
} | |
$temp = unpack('nlen', $this->_string_shift($response[NET_SSH1_RESPONSE_DATA], 2)); | |
$host_key_public_exponent = new Math_BigInteger($this->_string_shift($response[NET_SSH1_RESPONSE_DATA], ceil($temp['len'] / 8)), 256); | |
$this->host_key_public_exponent = $host_key_public_exponent; | |
if (strlen($response[NET_SSH1_RESPONSE_DATA]) < 2) { | |
return false; | |
} | |
$temp = unpack('nlen', $this->_string_shift($response[NET_SSH1_RESPONSE_DATA], 2)); | |
$host_key_public_modulus = new Math_BigInteger($this->_string_shift($response[NET_SSH1_RESPONSE_DATA], ceil($temp['len'] / 8)), 256); | |
$this->host_key_public_modulus = $host_key_public_modulus; | |
$this->_string_shift($response[NET_SSH1_RESPONSE_DATA], 4); | |
// get a list of the supported ciphers | |
if (strlen($response[NET_SSH1_RESPONSE_DATA]) < 4) { | |
return false; | |
} | |
extract(unpack('Nsupported_ciphers_mask', $this->_string_shift($response[NET_SSH1_RESPONSE_DATA], 4))); | |
foreach ($this->supported_ciphers as $mask => $name) { | |
if (($supported_ciphers_mask & (1 << $mask)) == 0) { | |
unset($this->supported_ciphers[$mask]); | |
} | |
} | |
// get a list of the supported authentications | |
if (strlen($response[NET_SSH1_RESPONSE_DATA]) < 4) { | |
return false; | |
} | |
extract(unpack('Nsupported_authentications_mask', $this->_string_shift($response[NET_SSH1_RESPONSE_DATA], 4))); | |
foreach ($this->supported_authentications as $mask => $name) { | |
if (($supported_authentications_mask & (1 << $mask)) == 0) { | |
unset($this->supported_authentications[$mask]); | |
} | |
} | |
$session_id = pack('H*', md5($host_key_public_modulus->toBytes() . $server_key_public_modulus->toBytes() . $anti_spoofing_cookie)); | |
$session_key = crypt_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 : NET_SSH1_CIPHER_3DES; | |
$data = pack('C2a*na*N', NET_SSH1_CMSG_SESSION_KEY, $cipher, $anti_spoofing_cookie, 8 * strlen($double_encrypted_session_key), $double_encrypted_session_key, 0); | |
if (!$this->_send_binary_packet($data)) { | |
user_error('Error sending SSH_CMSG_SESSION_KEY'); | |
return false; | |
} | |
switch ($cipher) { | |
//case NET_SSH1_CIPHER_NONE: | |
// $this->crypto = new Crypt_Null(); | |
// break; | |
case NET_SSH1_CIPHER_DES: | |
if (!class_exists('Crypt_DES')) { | |
include_once 'Crypt/DES.php'; | |
} | |
$this->crypto = new Crypt_DES(); | |
$this->crypto->disablePadding(); | |
$this->crypto->enableContinuousBuffer(); | |
$this->crypto->setKey(substr($session_key, 0, 8)); | |
break; | |
case NET_SSH1_CIPHER_3DES: | |
if (!class_exists('Crypt_TripleDES')) { | |
include_once 'Crypt/TripleDES.php'; | |
} | |
$this->crypto = new Crypt_TripleDES(CRYPT_DES_MODE_3CBC); | |
$this->crypto->disablePadding(); | |
$this->crypto->enableContinuousBuffer(); | |
$this->crypto->setKey(substr($session_key, 0, 24)); | |
break; | |
//case NET_SSH1_CIPHER_RC4: | |
// if (!class_exists('Crypt_RC4')) { | |
// include_once 'Crypt/RC4.php'; | |
// } | |
// $this->crypto = new Crypt_RC4(); | |
// $this->crypto->enableContinuousBuffer(); | |
// $this->crypto->setKey(substr($session_key, 0, 16)); | |
// break; | |
} | |
$response = $this->_get_binary_packet(); | |
if ($response[NET_SSH1_RESPONSE_TYPE] != NET_SSH1_SMSG_SUCCESS) { | |
user_error('Expected SSH_SMSG_SUCCESS'); | |
return false; | |
} | |
$this->bitmap = NET_SSH1_MASK_CONNECTED; | |
return true; | |
} | |
/** | |
* Login | |
* | |
* @param string $username | |
* @param string $password | |
* @return bool | |
* @access public | |
*/ | |
function login($username, $password = '') | |
{ | |
if (!($this->bitmap & NET_SSH1_MASK_CONSTRUCTOR)) { | |
$this->bitmap |= NET_SSH1_MASK_CONSTRUCTOR; | |
if (!$this->_connect()) { | |
return false; | |
} | |
} | |
if (!($this->bitmap & NET_SSH1_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[NET_SSH1_RESPONSE_TYPE] == NET_SSH1_SMSG_SUCCESS) { | |
$this->bitmap |= NET_SSH1_MASK_LOGIN; | |
return true; | |
} elseif ($response[NET_SSH1_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 == NET_SSH1_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[NET_SSH1_RESPONSE_TYPE] == NET_SSH1_SMSG_SUCCESS) { | |
$this->bitmap |= NET_SSH1_MASK_LOGIN; | |
return true; | |
} elseif ($response[NET_SSH1_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 Net_SSH1 object will need to be created. | |
* | |
* Returns false on failure and the output, otherwise. | |
* | |
* @see self::interactiveRead() | |
* @see self::interactiveWrite() | |
* @param string $cmd | |
* @return mixed | |
* @access public | |
*/ | |
function exec($cmd, $block = true) | |
{ | |
if (!($this->bitmap & NET_SSH1_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[NET_SSH1_RESPONSE_DATA], 4); | |
$response = $this->_get_binary_packet(); | |
} while (is_array($response) && $response[NET_SSH1_RESPONSE_TYPE] != NET_SSH1_SMSG_EXITSTATUS); | |
} | |
$data = pack('C', NET_SSH1_CMSG_EXIT_CONFIRMATION); | |
// i don't think it's really all that important if this packet gets sent or not. | |
$this->_send_binary_packet($data); | |
fclose($this->fsock); | |
// reset the execution bitmap - a new Net_SSH1 object needs to be created. | |
$this->bitmap = 0; | |
return $output; | |
} | |
/** | |
* Creates an interactive shell | |
* | |
* @see 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. | |
$data = pack('CNa*N4C', NET_SSH1_CMSG_REQUEST_PTY, strlen('vt100'), 'vt100', 24, 80, 0, 0, NET_SSH1_TTY_OP_END); | |
if (!$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[NET_SSH1_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; | |
} | |
$this->bitmap |= NET_SSH1_MASK_SHELL; | |
//stream_set_blocking($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 == NET_SSH1_READ_REGEX, | |
* a regular expression. | |
* | |
* @see self::write() | |
* @param string $expect | |
* @param int $mode | |
* @return bool | |
* @access public | |
*/ | |
function read($expect, $mode = NET_SSH1_READ_SIMPLE) | |
{ | |
if (!($this->bitmap & NET_SSH1_MASK_LOGIN)) { | |
user_error('Operation disallowed prior to login()'); | |
return false; | |
} | |
if (!($this->bitmap & NET_SSH1_MASK_SHELL) && !$this->_initShell()) { | |
user_error('Unable to initiate an interactive shell session'); | |
return false; | |
} | |
$match = $expect; | |
while (true) { | |
if ($mode == NET_SSH1_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[NET_SSH1_RESPONSE_DATA], 4); | |
} | |
} | |
/** | |
* Inputs a command into an interactive shell. | |
* | |
* @see self::interactiveRead() | |
* @param string $cmd | |
* @return bool | |
* @access public | |
*/ | |
function interactiveWrite($cmd) | |
{ | |
if (!($this->bitmap & NET_SSH1_MASK_LOGIN)) { | |
user_error('Operation disallowed prior to login()'); | |
return false; | |
} | |
if (!($this->bitmap & NET_SSH1_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 & NET_SSH1_MASK_LOGIN)) { | |
user_error('Operation disallowed prior to login()'); | |
return false; | |
} | |
if (!($this->bitmap & NET_SSH1_MASK_SHELL) && !$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[NET_SSH1_RESPONSE_DATA], 4); | |
} else { | |
return ''; | |
} | |
} | |
/** | |
* Disconnect | |
* | |
* @access public | |
*/ | |
function disconnect() | |
{ | |
$this->_disconnect(); | |
} | |
/** | |
* Destructor. | |
* | |
* Will be called, automatically, if you're supporting just PHP5. If you're supporting PHP4, you'll need to call | |
* disconnect(). | |
* | |
* @access public | |
*/ | |
function __destruct() | |
{ | |
$this->_disconnect(); | |
} | |
/** | |
* Disconnect | |
* | |
* @param string $msg | |
* @access private | |
*/ | |
function _disconnect($msg = 'Client Quit') | |
{ | |
if ($this->bitmap) { | |
$data = pack('C', NET_SSH1_CMSG_EOF); | |
$this->_send_binary_packet($data); | |
/* | |
$response = $this->_get_binary_packet(); | |
if ($response === true) { | |
$response = array(NET_SSH1_RESPONSE_TYPE => -1); | |
} | |
switch ($response[NET_SSH1_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); | |
$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( | |
NET_SSH1_RESPONSE_TYPE => $type, | |
NET_SSH1_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; | |
$padding = crypt_random_string(8 - ($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( | |
0x00000000, 0x77073096, 0xEE0E612C, 0x990951BA, | |
0x076DC419, 0x706AF48F, 0xE963A535, 0x9E6495A3, | |
0x0EDB8832, 0x79DCB8A4, 0xE0D5E91E, 0x97D2D988, | |
0x09B64C2B, 0x7EB17CBD, 0xE7B82D07, 0x90BF1D91, | |
0x1DB71064, 0x6AB020F2, 0xF3B97148, 0x84BE41DE, | |
0x1ADAD47D, 0x6DDDE4EB, 0xF4D4B551, 0x83D385C7, | |
0x136C9856, 0x646BA8C0, 0xFD62F97A, 0x8A65C9EC, | |
0x14015C4F, 0x63066CD9, 0xFA0F3D63, 0x8D080DF5, | |
0x3B6E20C8, 0x4C69105E, 0xD56041E4, 0xA2677172, | |
0x3C03E4D1, 0x4B04D447, 0xD20D85FD, 0xA50AB56B, | |
0x35B5A8FA, 0x42B2986C, 0xDBBBC9D6, 0xACBCF940, | |
0x32D86CE3, 0x45DF5C75, 0xDCD60DCF, 0xABD13D59, | |
0x26D930AC, 0x51DE003A, 0xC8D75180, 0xBFD06116, | |
0x21B4F4B5, 0x56B3C423, 0xCFBA9599, 0xB8BDA50F, | |
0x2802B89E, 0x5F058808, 0xC60CD9B2, 0xB10BE924, | |
0x2F6F7C87, 0x58684C11, 0xC1611DAB, 0xB6662D3D, | |
0x76DC4190, 0x01DB7106, 0x98D220BC, 0xEFD5102A, | |
0x71B18589, 0x06B6B51F, 0x9FBFE4A5, 0xE8B8D433, | |
0x7807C9A2, 0x0F00F934, 0x9609A88E, 0xE10E9818, | |
0x7F6A0DBB, 0x086D3D2D, 0x91646C97, 0xE6635C01, | |
0x6B6B51F4, 0x1C6C6162, 0x856530D8, 0xF262004E, | |
0x6C0695ED, 0x1B01A57B, 0x8208F4C1, 0xF50FC457, | |
0x65B0D9C6, 0x12B7E950, 0x8BBEB8EA, 0xFCB9887C, | |
0x62DD1DDF, 0x15DA2D49, 0x8CD37CF3, 0xFBD44C65, | |
0x4DB26158, 0x3AB551CE, 0xA3BC0074, 0xD4BB30E2, | |
0x4ADFA541, 0x3DD895D7, 0xA4D1C46D, 0xD3D6F4FB, | |
0x4369E96A, 0x346ED9FC, 0xAD678846, 0xDA60B8D0, | |
0x44042D73, 0x33031DE5, 0xAA0A4C5F, 0xDD0D7CC9, | |
0x5005713C, 0x270241AA, 0xBE0B1010, 0xC90C2086, | |
0x5768B525, 0x206F85B3, 0xB966D409, 0xCE61E49F, | |
0x5EDEF90E, 0x29D9C998, 0xB0D09822, 0xC7D7A8B4, | |
0x59B33D17, 0x2EB40D81, 0xB7BD5C3B, 0xC0BA6CAD, | |
0xEDB88320, 0x9ABFB3B6, 0x03B6E20C, 0x74B1D29A, | |
0xEAD54739, 0x9DD277AF, 0x04DB2615, 0x73DC1683, | |
0xE3630B12, 0x94643B84, 0x0D6D6A3E, 0x7A6A5AA8, | |
0xE40ECF0B, 0x9309FF9D, 0x0A00AE27, 0x7D079EB1, | |
0xF00F9344, 0x8708A3D2, 0x1E01F268, 0x6906C2FE, | |
0xF762575D, 0x806567CB, 0x196C3671, 0x6E6B06E7, | |
0xFED41B76, 0x89D32BE0, 0x10DA7A5A, 0x67DD4ACC, | |
0xF9B9DF6F, 0x8EBEEFF9, 0x17B7BE43, 0x60B08ED5, | |
0xD6D6A3E8, 0xA1D1937E, 0x38D8C2C4, 0x4FDFF252, | |
0xD1BB67F1, 0xA6BC5767, 0x3FB506DD, 0x48B2364B, | |
0xD80D2BDA, 0xAF0A1B4C, 0x36034AF6, 0x41047A60, | |
0xDF60EFC3, 0xA867DF55, 0x316E8EEF, 0x4669BE79, | |
0xCB61B38C, 0xBC66831A, 0x256FD2A0, 0x5268E236, | |
0xCC0C7795, 0xBB0B4703, 0x220216B9, 0x5505262F, | |
0xC5BA3BBE, 0xB2BD0B28, 0x2BB45A92, 0x5CB36A04, | |
0xC2D7FFA7, 0xB5D0CF31, 0x2CD99E8B, 0x5BDEAE1D, | |
0x9B64C2B0, 0xEC63F226, 0x756AA39C, 0x026D930A, | |
0x9C0906A9, 0xEB0E363F, 0x72076785, 0x05005713, | |
0x95BF4A82, 0xE2B87A14, 0x7BB12BAE, 0x0CB61B38, | |
0x92D28E9B, 0xE5D5BE0D, 0x7CDCEFB7, 0x0BDBDF21, | |
0x86D3D2D4, 0xF1D4E242, 0x68DDB3F8, 0x1FDA836E, | |
0x81BE16CD, 0xF6B9265B, 0x6FB077E1, 0x18B74777, | |
0x88085AE6, 0xFF0F6A70, 0x66063BCA, 0x11010B5C, | |
0x8F659EFF, 0xF862AE69, 0x616BFFD3, 0x166CCF45, | |
0xA00AE278, 0xD70DD2EE, 0x4E048354, 0x3903B3C2, | |
0xA7672661, 0xD06016F7, 0x4969474D, 0x3E6E77DB, | |
0xAED16A4A, 0xD9D65ADC, 0x40DF0B66, 0x37D83BF0, | |
0xA9BCAE53, 0xDEBB9EC5, 0x47B2CF7F, 0x30B5FFE9, | |
0xBDBDF21C, 0xCABAC28A, 0x53B39330, 0x24B4A3A6, | |
0xBAD03605, 0xCDD70693, 0x54DE5729, 0x23D967BF, | |
0xB3667A2E, 0xC4614AB8, 0x5D681B02, 0x2A6F2B94, | |
0xB40BBE37, 0xC30C8EA1, 0x5A05DF1B, 0x2D02EF8D | |
); | |
// For this function to yield the same output as PHP's crc32 function, $crc would have to be | |
// set to 0xFFFFFFFF, initially - not 0x00000000 as it currently is. | |
$crc = 0x00000000; | |
$length = strlen($data); | |
for ($i=0; $i<$length; $i++) { | |
// We AND $crc >> 8 with 0x00FFFFFF because we want the eight newly added bits to all | |
// be zero. PHP, unfortunately, doesn't always do this. 0x80000000 >> 8, as an example, | |
// yields 0xFF800000 - not 0x00800000. The following link elaborates: | |
// http://www.php.net/manual/en/language.operators.bitwise.php#57281 | |
$crc = (($crc >> 8) & 0x00FFFFFF) ^ $crc_lookup_table[($crc & 0xFF) ^ ord($data[$i])]; | |
} | |
// In addition to having to set $crc to 0xFFFFFFFF, initially, the return value must be XOR'd with | |
// 0xFFFFFFFF for this function to return the same thing that PHP's crc32 function would. | |
return $crc; | |
} | |
/** | |
* String Shift | |
* | |
* Inspired by array_shift | |
* | |
* @param string $string | |
* @param 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::Net_SSH1() | |
* @param Math_BigInteger $m | |
* @param array $key | |
* @return Math_BigInteger | |
* @access private | |
*/ | |
function _rsa_crypt($m, $key) | |
{ | |
/* | |
if (!class_exists('Crypt_RSA')) { | |
include_once 'Crypt/RSA.php'; | |
} | |
$rsa = new Crypt_RSA(); | |
$rsa->loadKey($key, CRYPT_RSA_PUBLIC_FORMAT_RAW); | |
$rsa->setEncryptionMode(CRYPT_RSA_ENCRYPTION_PKCS1); | |
return $rsa->encrypt($m); | |
*/ | |
// To quote from protocol-1.5.txt: | |
// The most significant byte (which is only partial as the value must be | |
// less than the public modulus, which is never a power of two) is zero. | |
// | |
// The next byte contains the value 2 (which stands for public-key | |
// encrypted data in the PKCS standard [PKCS#1]). Then, there are non- | |
// zero random bytes to fill any unused space, a zero byte, and the data | |
// to be encrypted in the least significant bytes, the last byte of the | |
// data in the least significant byte. | |
// Presumably the part of PKCS#1 they're refering to is "Section 7.2.1 Encryption Operation", | |
// under "7.2 RSAES-PKCS1-v1.5" and "7 Encryption schemes" of the following URL: | |
// ftp://ftp.rsasecurity.com/pub/pkcs/pkcs-1/pkcs-1v2-1.pdf | |
$modulus = $key[1]->toBytes(); | |
$length = strlen($modulus) - strlen($m) - 3; | |
$random = ''; | |
while (strlen($random) != $length) { | |
$block = crypt_random_string($length - strlen($random)); | |
$block = str_replace("\x00", '', $block); | |
$random.= $block; | |
} | |
$temp = chr(0) . chr(2) . $random . chr(0) . $m; | |
$m = new Math_BigInteger($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. | |
* | |
* @param array $array | |
* @access private | |
*/ | |
function _define_array() | |
{ | |
$args = func_get_args(); | |
foreach ($args as $arg) { | |
foreach ($arg as $key => $value) { | |
if (!defined($value)) { | |
define($value, $key); | |
} else { | |
break 2; | |
} | |
} | |
} | |
} | |
/** | |
* Returns a log of the packets that have been sent and received. | |
* | |
* Returns a string if NET_SSH1_LOGGING == NET_SSH1_LOG_COMPLEX, an array if NET_SSH1_LOGGING == NET_SSH1_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 NET_SSH1_LOG_SIMPLE: | |
return $this->message_number_log; | |
break; | |
case NET_SSH1_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(NET_SSH1_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(NET_SSH1_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 string $data | |
* @access private | |
*/ | |
function _append_log($protocol_flags, $message) | |
{ | |
switch (NET_SSH1_LOGGING) { | |
// useful for benchmarks | |
case NET_SSH1_LOG_SIMPLE: | |
$this->protocol_flags_log[] = $protocol_flags; | |
break; | |
// the most useful log for SSH1 | |
case NET_SSH1_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 > NET_SSH1_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 NET_SSH1_LOG_REALTIME: | |
echo "<pre>\r\n" . $this->_format_log(array($message), array($protocol_flags)) . "\r\n</pre>\r\n"; | |
@flush(); | |
@ob_flush(); | |
break; | |
// basically the same thing as NET_SSH1_LOG_REALTIME with the caveat that NET_SSH1_LOG_REALTIME_FILE | |
// needs to be defined and that the resultant log file will be capped out at NET_SSH1_LOG_MAX_SIZE. | |
// the earliest part of the log file is denoted by the first <<< START >>> and is not going to necessarily | |
// at the beginning of the file | |
case NET_SSH1_LOG_REALTIME_FILE: | |
if (!isset($this->realtime_log_file)) { | |
// PHP doesn't seem to like using constants in fopen() | |
$filename = NET_SSH1_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 ($this->realtime_log_size > NET_SSH1_LOG_MAX_SIZE) { | |
fseek($this->realtime_log_file, 0); | |
$this->realtime_log_size = strlen($entry); | |
$this->realtime_log_wrap = true; | |
} | |
fputs($this->realtime_log_file, $entry); | |
} | |
} | |
} |