mirror of
https://github.com/phpseclib/phpseclib.git
synced 2024-12-25 11:20:03 +00:00
- fixed a bug whereby a second Net_SSH2() object couldn't be created (the sequence numbers weren't being reset)
- fixed a bug whereby SSH_MSG_DISCONNECT messages wouldn't be handled correctly - other small changes git-svn-id: http://phpseclib.svn.sourceforge.net/svnroot/phpseclib/trunk@18 21d32557-59b3-4da0-833f-c5933fad653e
This commit is contained in:
Jim Wigginton
parent
01c841a0a0
commit
69c639d845
@ -41,7 +41,7 @@
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* @author Jim Wigginton <terrafrost@php.net>
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* @copyright MMVII Jim Wigginton
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* @license http://www.gnu.org/licenses/lgpl.txt
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* @version $Id: SSH2.php,v 1.7 2008-05-25 07:28:57 terrafrost Exp $
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* @version $Id: SSH2.php,v 1.8 2008-05-26 19:42:01 terrafrost Exp $
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* @link http://phpseclib.sourceforge.net
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*/
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@ -72,62 +72,6 @@ require_once('Crypt/TripleDES.php');
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*/
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require_once('Crypt/RC4.php');
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/**#@+
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* Message Numbers
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*
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* @access private
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*/
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define('NET_SSH2_MSG_DISCONNECT', 1);
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define('NET_SSH2_MSG_IGNORE', 2);
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define('NET_SSH2_MSG_UNIMPLEMENTED', 3);
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define('NET_SSH2_MSG_DEBUG', 4);
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define('NET_SSH2_MSG_SERVICE_REQUEST', 5);
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define('NET_SSH2_MSG_SERVICE_ACCEPT', 6);
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define('NET_SSH2_MSG_KEXINIT', 20);
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define('NET_SSH2_MSG_NEWKEYS', 21);
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define('NET_SSH2_MSG_KEXDH_INIT', 30);
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define('NET_SSH2_MSG_KEXDH_REPLY', 31);
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define('NET_SSH2_MSG_USERAUTH_REQUEST', 50);
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define('NET_SSH2_MSG_USERAUTH_FAILURE', 51);
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define('NET_SSH2_MSG_USERAUTH_SUCCESS', 52);
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define('NET_SSH2_MSG_USERAUTH_BANNER', 53);
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define('NET_SSH2_MSG_USERAUTH_PASSWD_CHANGEREQ', 60);
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define('NET_SSH2_MSG_GLOBAL_REQUEST', 80);
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define('NET_SSH2_MSG_REQUEST_SUCCESS', 81);
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define('NET_SSH2_MSG_REQUEST_FAILURE', 82);
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define('NET_SSH2_MSG_CHANNEL_OPEN', 90);
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define('NET_SSH2_MSG_CHANNEL_OPEN_CONFIRMATION', 91);
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define('NET_SSH2_MSG_CHANNEL_OPEN_FAILURE', 92);
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define('NET_SSH2_MSG_CHANNEL_WINDOW_ADJUST', 93);
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define('NET_SSH2_MSG_CHANNEL_DATA', 94);
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define('NET_SSH2_MSG_CHANNEL_EXTENDED_DATA', 95);
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define('NET_SSH2_MSG_CHANNEL_EOF', 96);
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define('NET_SSH2_MSG_CHANNEL_CLOSE', 97);
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define('NET_SSH2_MSG_CHANNEL_REQUEST', 98);
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define('NET_SSH2_MSG_CHANNEL_SUCCESS', 99);
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define('NET_SSH2_MSG_CHANNEL_FAILURE', 100);
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/**#@-*/
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/**#@+
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* Disconnection Message 'reason codes' defined in RFC4253
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*
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* @access private
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*/
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define('NET_SSH2_DISCONNECT_KEY_EXCHANGE_FAILED', 3);
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define('NET_SSH2_DISCONNECT_HOST_KEY_NOT_VERIFIABLE', 9);
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define('NET_SSH2_DISCONNECT_BY_APPLICATION', 11);
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define('NET_SSH2_DISCONNECT_AUTH_CANCELLED_BY_USER', 13);
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/**#@-*/
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/**#@+
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* SSH_MSG_CHANNEL_OPEN_FAILURE 'reason codes', defined in RFC4254
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*
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* @access private
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*/
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define('NET_SSH2_OPEN_ADMINISTRATIVELY_PROHIBITED', 1);
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/**#@-*/
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/**#@+
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* Execution Bitmap Masks
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*
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@ -138,24 +82,6 @@ define('NET_SSH2_MASK_CONSTRUCTOR', 0x00000001);
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define('NET_SSH2_MASK_LOGIN', 0x00000002);
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/**#@-*/
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/**#@+
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* Terminal Modes
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*
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* @link http://tools.ietf.org/html/rfc4254#section-8
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* @access private
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*/
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define('NET_SSH2_TTY_OP_END', 0);
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/**#@-*/
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/**#@+
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* SSH_MSG_CHANNEL_EXTENDED_DATA's data_type_codes
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*
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* @link http://tools.ietf.org/html/rfc4254#section-5.2
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* @access private
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*/
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define('NET_SSH2_EXTENDED_DATA_STDERR', 1);
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/**#@-*/
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/**
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* Pure-PHP implementation of SSHv2.
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*
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@ -382,6 +308,75 @@ class Net_SSH2 {
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*/
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var $session_id = false;
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/**
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* Message Numbers
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*
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* @see Net_SSH2::Net_SSH2()
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* @var Array
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* @access private
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*/
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var $message_numbers = array();
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/**
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* Disconnection Message 'reason codes' defined in RFC4253
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*
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* @see Net_SSH2::Net_SSH2()
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* @var Array
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* @access private
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*/
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var $disconnect_reasons = array();
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/**
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* SSH_MSG_CHANNEL_OPEN_FAILURE 'reason codes', defined in RFC4254
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*
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* @see Net_SSH2::Net_SSH2()
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* @var Array
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* @access private
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*/
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var $channel_open_failure_reasons = array();
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/**
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* Terminal Modes
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*
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* @link http://tools.ietf.org/html/rfc4254#section-8
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* @see Net_SSH2::Net_SSH2()
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* @var Array
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* @access private
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*/
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var $terminal_modes = array();
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/**
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* SSH_MSG_CHANNEL_EXTENDED_DATA's data_type_codes
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*
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* @link http://tools.ietf.org/html/rfc4254#section-5.2
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* @see Net_SSH2::Net_SSH2()
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* @var Array
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* @access private
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*/
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var $channel_extended_data_type_codes = array();
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/**
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* Send Sequence Number
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*
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* See 'Section 6.4. Data Integrity' of rfc4253 for more info.
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*
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* @see Net_SSH2::_send_binary_packet()
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* @var Integer
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* @access private
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*/
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var $send_seq_no = 0;
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/**
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* Get Sequence Number
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*
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* See 'Section 6.4. Data Integrity' of rfc4253 for more info.
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*
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* @see Net_SSH2::_get_binary_packet()
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* @var Integer
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* @access private
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*/
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var $get_seq_no = 0;
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/**
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* Default Constructor.
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*
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@ -395,6 +390,73 @@ class Net_SSH2 {
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*/
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function Net_SSH2($host, $port = 22, $timeout = 10)
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{
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$this->message_numbers = array(
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1 => 'NET_SSH2_MSG_DISCONNECT',
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2 => 'NET_SSH2_MSG_IGNORE',
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3 => 'NET_SSH2_MSG_UNIMPLEMENTED',
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4 => 'NET_SSH2_MSG_DEBUG',
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5 => 'NET_SSH2_MSG_SERVICE_REQUEST',
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6 => 'NET_SSH2_MSG_SERVICE_ACCEPT',
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20 => 'NET_SSH2_MSG_KEXINIT',
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21 => 'NET_SSH2_MSG_NEWKEYS',
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30 => 'NET_SSH2_MSG_KEXDH_INIT',
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31 => 'NET_SSH2_MSG_KEXDH_REPLY',
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50 => 'NET_SSH2_MSG_USERAUTH_REQUEST',
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51 => 'NET_SSH2_MSG_USERAUTH_FAILURE',
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52 => 'NET_SSH2_MSG_USERAUTH_SUCCESS',
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53 => 'NET_SSH2_MSG_USERAUTH_BANNER',
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60 => 'NET_SSH2_MSG_USERAUTH_PASSWD_CHANGEREQ',
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80 => 'NET_SSH2_MSG_GLOBAL_REQUEST',
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81 => 'NET_SSH2_MSG_REQUEST_SUCCESS',
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82 => 'NET_SSH2_MSG_REQUEST_FAILURE',
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90 => 'NET_SSH2_MSG_CHANNEL_OPEN',
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91 => 'NET_SSH2_MSG_CHANNEL_OPEN_CONFIRMATION',
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92 => 'NET_SSH2_MSG_CHANNEL_OPEN_FAILURE',
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93 => 'NET_SSH2_MSG_CHANNEL_WINDOW_ADJUST',
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94 => 'NET_SSH2_MSG_CHANNEL_DATA',
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95 => 'NET_SSH2_MSG_CHANNEL_EXTENDED_DATA',
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96 => 'NET_SSH2_MSG_CHANNEL_EOF',
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97 => 'NET_SSH2_MSG_CHANNEL_CLOSE',
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98 => 'NET_SSH2_MSG_CHANNEL_REQUEST',
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99 => 'NET_SSH2_MSG_CHANNEL_SUCCESS',
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100 => 'NET_SSH2_MSG_CHANNEL_FAILURE'
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);
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$this->disconnect_reasons = array(
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1 => 'NET_SSH2_DISCONNECT_HOST_NOT_ALLOWED_TO_CONNECT',
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2 => 'NET_SSH2_DISCONNECT_PROTOCOL_ERROR',
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3 => 'NET_SSH2_DISCONNECT_KEY_EXCHANGE_FAILED',
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4 => 'NET_SSH2_DISCONNECT_RESERVED',
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5 => 'NET_SSH2_DISCONNECT_MAC_ERROR',
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6 => 'NET_SSH2_DISCONNECT_COMPRESSION_ERROR',
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7 => 'NET_SSH2_DISCONNECT_SERVICE_NOT_AVAILABLE',
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8 => 'NET_SSH2_DISCONNECT_PROTOCOL_VERSION_NOT_SUPPORTED',
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9 => 'NET_SSH2_DISCONNECT_HOST_KEY_NOT_VERIFIABLE',
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10 => 'NET_SSH2_DISCONNECT_CONNECTION_LOST',
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11 => 'NET_SSH2_DISCONNECT_BY_APPLICATION',
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12 => 'NET_SSH2_DISCONNECT_TOO_MANY_CONNECTIONS',
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13 => 'NET_SSH2_DISCONNECT_AUTH_CANCELLED_BY_USER',
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14 => 'NET_SSH2_DISCONNECT_NO_MORE_AUTH_METHODS_AVAILABLE',
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15 => 'NET_SSH2_DISCONNECT_ILLEGAL_USER_NAME'
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);
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$this->channel_open_failure_reasons = array(
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1 => 'NET_SSH2_OPEN_ADMINISTRATIVELY_PROHIBITED'
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);
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$this->terminal_modes = array(
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0 => 'NET_SSH2_TTY_OP_END'
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);
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$this->channel_extended_data_type_codes = array(
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1 => 'NET_SSH2_EXTENDED_DATA_STDERR'
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);
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$this->_define_array(
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$this->message_numbers,
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$this->disconnect_reasons,
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$this->channel_open_failure_reasons,
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$this->terminal_modes,
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$this->channel_extended_data_type_codes
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);
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$this->fsock = fsockopen($host, $port, $errno, $errstr, $timeout);
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if (!$this->fsock) {
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user_error(rtrim("Cannot connect to $host. Error $errno. $errstr"), E_USER_NOTICE);
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@ -872,7 +934,6 @@ class Net_SSH2 {
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//$this->encrypt = new Crypt_Null();
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}
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switch ($decrypt) {
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case '3des-cbc':
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$this->decrypt = new Crypt_TripleDES();
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@ -999,6 +1060,7 @@ class Net_SSH2 {
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$key.= pack('H*', $hash($keyBytes . $source . $key));
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}
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$this->hmac_check->setKey(substr($key, 0, $checkKeyLength));
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}
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/**
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@ -1037,7 +1099,6 @@ class Net_SSH2 {
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}
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// publickey authentatication is required, per the SSH-2 specs, however, we don't support it.
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$utf8_password = utf8_encode($password);
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$packet = pack('CNa*Na*Na*CNa*',
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NET_SSH2_MSG_USERAUTH_REQUEST, strlen($username), $username, strlen('ssh-connection'), 'ssh-connection',
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@ -1170,7 +1231,6 @@ class Net_SSH2 {
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}
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$output = '';
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$exit = false;
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while (true) {
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$response = $this->_get_binary_packet();
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@ -1209,7 +1269,7 @@ class Net_SSH2 {
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list(, $length) = unpack('N', $this->_string_shift($response, 4));
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$this->debug_info.= "\r\n" . $this->_string_shift($response, $length);
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case 'exit-status':
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//$exit = true;
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//break 2;
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break;
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default:
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$this->bitmap = 0;
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@ -1219,8 +1279,7 @@ class Net_SSH2 {
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break;
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case NET_SSH2_MSG_CHANNEL_CLOSE:
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$this->_send_binary_packet(pack('CN', NET_SSH2_MSG_CHANNEL_CLOSE, $server_channel));
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$exit = true;
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break;
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break 2;
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case NET_SSH2_MSG_CHANNEL_EOF:
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break;
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default:
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@ -1228,10 +1287,6 @@ class Net_SSH2 {
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user_error('Error reading channel data', E_USER_NOTICE);
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return $this->_disconnect(NET_SSH2_DISCONNECT_BY_APPLICATION);
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}
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if ($exit) {
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break;
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}
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}
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return $output;
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@ -1276,8 +1331,6 @@ class Net_SSH2 {
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return false;
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}
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static $seq = 0;
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$raw = fread($this->fsock, $this->block_size);
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if ($this->decrypt !== false) {
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@ -1296,13 +1349,13 @@ class Net_SSH2 {
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if ($this->hmac_check !== false) {
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$hmac = fread($this->fsock, $this->hmac_size);
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if ($hmac != $this->hmac_check->hmac(pack('NNCa*', $seq, $packet_length, $padding_length, $payload . $padding))) {
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if ($hmac != $this->hmac_check->hmac(pack('NNCa*', $this->get_seq_no, $packet_length, $padding_length, $payload . $padding))) {
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user_error('Invalid HMAC', E_USER_NOTICE);
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return false;
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}
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}
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$seq++;
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$this->get_seq_no++;
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return $this->_filter($payload);
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}
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@ -1320,9 +1373,9 @@ class Net_SSH2 {
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{
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switch (ord($payload[0])) {
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case NET_SSH2_MSG_DISCONNECT:
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$this->_string_shift($payload, 5);
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list(, $length) = unpack('N', $this->_string_shift($payload, 4));
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$this->debug_info.= "\r\n\r\nSSH_MSG_DISCONNECT:\r\n" . utf8_decode($this->_string_shift($payload, $length));
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$this->_string_shift($payload, 1);
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list(, $reason_code, $length) = unpack('N2', $this->_string_shift($payload, 8));
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$this->debug_info.= "\r\n\r\nSSH_MSG_DISCONNECT:\r\n" . $this->disconnect_reasons[$reason_code] . "\r\n" . utf8_decode($this->_string_shift($payload, $temp['length']));
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$this->bitmask = 0;
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return false;
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case NET_SSH2_MSG_IGNORE:
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@ -1401,7 +1454,7 @@ class Net_SSH2 {
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*
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* @param String $data
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* @see Net_SSH2::_get_binary_packet()
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* @return A rray
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* @return Boolean
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* @access private
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*/
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function _send_binary_packet($data)
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@ -1411,8 +1464,6 @@ class Net_SSH2 {
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return false;
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}
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static $seq = 0;
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// 4, for the packet length + 1, for the padding length + 4, for the minimal padding amount
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$packet_length = strlen($data) + 9;
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// round up to the nearest $this->block_size
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@ -1428,8 +1479,8 @@ class Net_SSH2 {
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// we subtract 4 from packet_length because the packet_length field isn't supposed to include itself
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$packet = pack('NCa*', $packet_length - 4, $padding_length, $data . $padding);
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$hmac = $this->hmac_create !== false ? $this->hmac_create->hmac(pack('Na*', $seq, $packet)) : '';
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$seq++;
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$hmac = $this->hmac_create !== false ? $this->hmac_create->hmac(pack('Na*', $this->send_seq_no, $packet)) : '';
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$this->send_seq_no++;
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if ($this->encrypt !== false) {
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$packet = $this->encrypt->encrypt($packet);
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@ -1452,7 +1503,7 @@ class Net_SSH2 {
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if ($this->bitmap) {
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$data = pack('CNNa*Na*', NET_SSH2_MSG_DISCONNECT, $reason, 0, '', 0, '');
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$this->_send_binary_packet($data);
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$this->bitmask = 0;
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$this->bitmap = 0;
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fclose($this->fsock);
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return false;
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}
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@ -1475,6 +1526,30 @@ class Net_SSH2 {
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return $substr;
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}
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/**
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* Define Array
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*
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* Takes any number of arrays whose indices are integers and whose values are strings and defines a bunch of
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* named constants from it, using the value as the name of the constant and the index as the value of the constant.
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* If any of the constants that would be defined already exists, none of the constants will be defined.
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*
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* @param Array $array
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* @access private
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*/
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function _define_array()
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{
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$args = func_get_args();
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foreach ($args as $arg) {
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foreach ($arg as $key=>$value) {
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if (!defined($value)) {
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define($value, $key);
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} else {
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break 2;
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}
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}
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}
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}
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/**
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* Returns Debug Information
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*
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