From 0b221e8945ae785dc706d8ea9a9e8e25532c0096 Mon Sep 17 00:00:00 2001 From: Friendika Date: Tue, 28 Jun 2011 21:11:52 -0700 Subject: bug #96 move libraries to library - better alignment of like rotator --- phpsec/Net/SFTP.php | 1461 -------------------------------- phpsec/Net/SSH1.php | 1160 -------------------------- phpsec/Net/SSH2.php | 2302 --------------------------------------------------- 3 files changed, 4923 deletions(-) delete mode 100644 phpsec/Net/SFTP.php delete mode 100644 phpsec/Net/SSH1.php delete mode 100644 phpsec/Net/SSH2.php (limited to 'phpsec/Net') diff --git a/phpsec/Net/SFTP.php b/phpsec/Net/SFTP.php deleted file mode 100644 index 06812ada3..000000000 --- a/phpsec/Net/SFTP.php +++ /dev/null @@ -1,1461 +0,0 @@ - - * login('username', 'password')) { - * exit('Login Failed'); - * } - * - * echo $sftp->pwd() . "\r\n"; - * $sftp->put('filename.ext', 'hello, world!'); - * print_r($sftp->nlist()); - * ?> - * - * - * LICENSE: This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; either - * version 2.1 of the License, or (at your option) any later version. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with this library; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, - * MA 02111-1307 USA - * - * @category Net - * @package Net_SFTP - * @author Jim Wigginton - * @copyright MMIX Jim Wigginton - * @license http://www.gnu.org/licenses/lgpl.txt - * @version $Id: SFTP.php,v 1.21 2010/04/09 02:31:34 terrafrost Exp $ - * @link http://phpseclib.sourceforge.net - */ - -/** - * Include Net_SSH2 - */ -require_once('Net/SSH2.php'); - -/**#@+ - * @access public - * @see Net_SFTP::getLog() - */ -/** - * Returns the message numbers - */ -define('NET_SFTP_LOG_SIMPLE', NET_SSH2_LOG_SIMPLE); -/** - * Returns the message content - */ -define('NET_SFTP_LOG_COMPLEX', NET_SSH2_LOG_COMPLEX); -/**#@-*/ - -/** - * SFTP channel constant - * - * Net_SSH2::exec() uses 0 and Net_SSH2::interactiveRead() / Net_SSH2::interactiveWrite() use 1. - * - * @see Net_SSH2::_send_channel_packet() - * @see Net_SSH2::_get_channel_packet() - * @access private - */ -define('NET_SFTP_CHANNEL', 2); - -/**#@+ - * @access public - * @see Net_SFTP::put() - */ -/** - * Reads data from a local file. - */ -define('NET_SFTP_LOCAL_FILE', 1); -/** - * Reads data from a string. - */ -define('NET_SFTP_STRING', 2); -/**#@-*/ - -/** - * Pure-PHP implementations of SFTP. - * - * @author Jim Wigginton - * @version 0.1.0 - * @access public - * @package Net_SFTP - */ -class Net_SFTP extends Net_SSH2 { - /** - * Packet Types - * - * @see Net_SFTP::Net_SFTP() - * @var Array - * @access private - */ - var $packet_types = array(); - - /** - * Status Codes - * - * @see Net_SFTP::Net_SFTP() - * @var Array - * @access private - */ - var $status_codes = array(); - - /** - * The Request ID - * - * The request ID exists in the off chance that a packet is sent out-of-order. Of course, this library doesn't support - * concurrent actions, so it's somewhat academic, here. - * - * @var Integer - * @see Net_SFTP::_send_sftp_packet() - * @access private - */ - var $request_id = false; - - /** - * The Packet Type - * - * The request ID exists in the off chance that a packet is sent out-of-order. Of course, this library doesn't support - * concurrent actions, so it's somewhat academic, here. - * - * @var Integer - * @see Net_SFTP::_get_sftp_packet() - * @access private - */ - var $packet_type = -1; - - /** - * Packet Buffer - * - * @var String - * @see Net_SFTP::_get_sftp_packet() - * @access private - */ - var $packet_buffer = ''; - - /** - * Extensions supported by the server - * - * @var Array - * @see Net_SFTP::_initChannel() - * @access private - */ - var $extensions = array(); - - /** - * Server SFTP version - * - * @var Integer - * @see Net_SFTP::_initChannel() - * @access private - */ - var $version; - - /** - * Current working directory - * - * @var String - * @see Net_SFTP::_realpath() - * @see Net_SFTP::chdir() - * @access private - */ - var $pwd = false; - - /** - * Packet Type Log - * - * @see Net_SFTP::getLog() - * @var Array - * @access private - */ - var $packet_type_log = array(); - - /** - * Packet Log - * - * @see Net_SFTP::getLog() - * @var Array - * @access private - */ - var $packet_log = array(); - - /** - * Error information - * - * @see Net_SFTP::getSFTPErrors() - * @see Net_SFTP::getLastSFTPError() - * @var String - * @access private - */ - var $errors = array(); - - /** - * Default Constructor. - * - * Connects to an SFTP server - * - * @param String $host - * @param optional Integer $port - * @param optional Integer $timeout - * @return Net_SFTP - * @access public - */ - function Net_SFTP($host, $port = 22, $timeout = 10) - { - parent::Net_SSH2($host, $port, $timeout); - $this->packet_types = array( - 1 => 'NET_SFTP_INIT', - 2 => 'NET_SFTP_VERSION', - /* the format of SSH_FXP_OPEN changed between SFTPv4 and SFTPv5+: - SFTPv5+: http://tools.ietf.org/html/draft-ietf-secsh-filexfer-13#section-8.1.1 - pre-SFTPv5 : http://tools.ietf.org/html/draft-ietf-secsh-filexfer-04#section-6.3 */ - 3 => 'NET_SFTP_OPEN', - 4 => 'NET_SFTP_CLOSE', - 5 => 'NET_SFTP_READ', - 6 => 'NET_SFTP_WRITE', - 8 => 'NET_SFTP_FSTAT', - 9 => 'NET_SFTP_SETSTAT', - 11 => 'NET_SFTP_OPENDIR', - 12 => 'NET_SFTP_READDIR', - 13 => 'NET_SFTP_REMOVE', - 14 => 'NET_SFTP_MKDIR', - 15 => 'NET_SFTP_RMDIR', - 16 => 'NET_SFTP_REALPATH', - 17 => 'NET_SFTP_STAT', - /* the format of SSH_FXP_RENAME changed between SFTPv4 and SFTPv5+: - SFTPv5+: http://tools.ietf.org/html/draft-ietf-secsh-filexfer-13#section-8.3 - pre-SFTPv5 : http://tools.ietf.org/html/draft-ietf-secsh-filexfer-04#section-6.5 */ - 18 => 'NET_SFTP_RENAME', - - 101=> 'NET_SFTP_STATUS', - 102=> 'NET_SFTP_HANDLE', - /* the format of SSH_FXP_NAME changed between SFTPv3 and SFTPv4+: - SFTPv4+: http://tools.ietf.org/html/draft-ietf-secsh-filexfer-13#section-9.4 - pre-SFTPv4 : http://tools.ietf.org/html/draft-ietf-secsh-filexfer-02#section-7 */ - 103=> 'NET_SFTP_DATA', - 104=> 'NET_SFTP_NAME', - 105=> 'NET_SFTP_ATTRS', - - 200=> 'NET_SFTP_EXTENDED' - ); - $this->status_codes = array( - 0 => 'NET_SFTP_STATUS_OK', - 1 => 'NET_SFTP_STATUS_EOF', - 2 => 'NET_SFTP_STATUS_NO_SUCH_FILE', - 3 => 'NET_SFTP_STATUS_PERMISSION_DENIED', - 4 => 'NET_SFTP_STATUS_FAILURE', - 5 => 'NET_SFTP_STATUS_BAD_MESSAGE', - 6 => 'NET_SFTP_STATUS_NO_CONNECTION', - 7 => 'NET_SFTP_STATUS_CONNECTION_LOST', - 8 => 'NET_SFTP_STATUS_OP_UNSUPPORTED' - ); - // http://tools.ietf.org/html/draft-ietf-secsh-filexfer-13#section-7.1 - // the order, in this case, matters quite a lot - see Net_SFTP::_parseAttributes() to understand why - $this->attributes = array( - 0x00000001 => 'NET_SFTP_ATTR_SIZE', - 0x00000002 => 'NET_SFTP_ATTR_UIDGID', // defined in SFTPv3, removed in SFTPv4+ - 0x00000004 => 'NET_SFTP_ATTR_PERMISSIONS', - 0x00000008 => 'NET_SFTP_ATTR_ACCESSTIME', - -1 => 'NET_SFTP_ATTR_EXTENDED' // unpack('N', "\xFF\xFF\xFF\xFF") == array(1 => int(-1)) - ); - // http://tools.ietf.org/html/draft-ietf-secsh-filexfer-04#section-6.3 - // the flag definitions change somewhat in SFTPv5+. if SFTPv5+ support is added to this library, maybe name - // the array for that $this->open5_flags and similarily alter the constant names. - $this->open_flags = array( - 0x00000001 => 'NET_SFTP_OPEN_READ', - 0x00000002 => 'NET_SFTP_OPEN_WRITE', - 0x00000008 => 'NET_SFTP_OPEN_CREATE', - 0x00000010 => 'NET_SFTP_OPEN_TRUNCATE' - ); - $this->_define_array( - $this->packet_types, - $this->status_codes, - $this->attributes, - $this->open_flags - ); - } - - /** - * Login - * - * @param String $username - * @param optional String $password - * @return Boolean - * @access public - */ - function login($username, $password = '') - { - if (!parent::login($username, $password)) { - return false; - } - - $this->window_size_client_to_server[NET_SFTP_CHANNEL] = $this->window_size; - - $packet = pack('CNa*N3', - NET_SSH2_MSG_CHANNEL_OPEN, strlen('session'), 'session', NET_SFTP_CHANNEL, $this->window_size, 0x4000); - - if (!$this->_send_binary_packet($packet)) { - return false; - } - - $this->channel_status[NET_SFTP_CHANNEL] = NET_SSH2_MSG_CHANNEL_OPEN; - - $response = $this->_get_channel_packet(NET_SFTP_CHANNEL); - if ($response === false) { - return false; - } - - $packet = pack('CNNa*CNa*', - NET_SSH2_MSG_CHANNEL_REQUEST, $this->server_channels[NET_SFTP_CHANNEL], strlen('subsystem'), 'subsystem', 1, strlen('sftp'), 'sftp'); - if (!$this->_send_binary_packet($packet)) { - return false; - } - - $this->channel_status[NET_SFTP_CHANNEL] = NET_SSH2_MSG_CHANNEL_REQUEST; - - $response = $this->_get_channel_packet(NET_SFTP_CHANNEL); - if ($response === false) { - return false; - } - - $this->channel_status[NET_SFTP_CHANNEL] = NET_SSH2_MSG_CHANNEL_DATA; - - if (!$this->_send_sftp_packet(NET_SFTP_INIT, "\0\0\0\3")) { - return false; - } - - $response = $this->_get_sftp_packet(); - if ($this->packet_type != NET_SFTP_VERSION) { - user_error('Expected SSH_FXP_VERSION', E_USER_NOTICE); - return false; - } - - extract(unpack('Nversion', $this->_string_shift($response, 4))); - $this->version = $version; - while (!empty($response)) { - extract(unpack('Nlength', $this->_string_shift($response, 4))); - $key = $this->_string_shift($response, $length); - extract(unpack('Nlength', $this->_string_shift($response, 4))); - $value = $this->_string_shift($response, $length); - $this->extensions[$key] = $value; - } - - /* - SFTPv4+ defines a 'newline' extension. SFTPv3 seems to have unofficial support for it via 'newline@vandyke.com', - however, I'm not sure what 'newline@vandyke.com' is supposed to do (the fact that it's unofficial means that it's - not in the official SFTPv3 specs) and 'newline@vandyke.com' / 'newline' are likely not drop-in substitutes for - one another due to the fact that 'newline' comes with a SSH_FXF_TEXT bitmask whereas it seems unlikely that - 'newline@vandyke.com' would. - */ - /* - if (isset($this->extensions['newline@vandyke.com'])) { - $this->extensions['newline'] = $this->extensions['newline@vandyke.com']; - unset($this->extensions['newline@vandyke.com']); - } - */ - - $this->request_id = 1; - - /* - A Note on SFTPv4/5/6 support: - states the following: - - "If the client wishes to interoperate with servers that support noncontiguous version - numbers it SHOULD send '3'" - - Given that the server only sends its version number after the client has already done so, the above - seems to be suggesting that v3 should be the default version. This makes sense given that v3 is the - most popular. - - states the following; - - "If the server did not send the "versions" extension, or the version-from-list was not included, the - server MAY send a status response describing the failure, but MUST then close the channel without - processing any further requests." - - So what do you do if you have a client whose initial SSH_FXP_INIT packet says it implements v3 and - a server whose initial SSH_FXP_VERSION reply says it implements v4 and only v4? If it only implements - v4, the "versions" extension is likely not going to have been sent so version re-negotiation as discussed - in draft-ietf-secsh-filexfer-13 would be quite impossible. As such, what Net_SFTP would do is close the - channel and reopen it with a new and updated SSH_FXP_INIT packet. - */ - if ($this->version != 3) { - return false; - } - - $this->pwd = $this->_realpath('.'); - - return true; - } - - /** - * Returns the current directory name - * - * @return Mixed - * @access public - */ - function pwd() - { - return $this->pwd; - } - - /** - * Canonicalize the Server-Side Path Name - * - * SFTP doesn't provide a mechanism by which the current working directory can be changed, so we'll emulate it. Returns - * the absolute (canonicalized) path. If $mode is set to NET_SFTP_CONFIRM_DIR (as opposed to NET_SFTP_CONFIRM_NONE, - * which is what it is set to by default), false is returned if $dir is not a valid directory. - * - * @see Net_SFTP::chdir() - * @param String $dir - * @param optional Integer $mode - * @return Mixed - * @access private - */ - function _realpath($dir) - { - /* - "This protocol represents file names as strings. File names are - assumed to use the slash ('/') character as a directory separator. - - File names starting with a slash are "absolute", and are relative to - the root of the file system. Names starting with any other character - are relative to the user's default directory (home directory). Note - that identifying the user is assumed to take place outside of this - protocol." - - -- http://tools.ietf.org/html/draft-ietf-secsh-filexfer-13#section-6 - */ - $file = ''; - if ($this->pwd !== false) { - // if the SFTP server returned the canonicalized path even for non-existant files this wouldn't be necessary - // on OpenSSH it isn't necessary but on other SFTP servers it is. that and since the specs say nothing on - // the subject, we'll go ahead and work around it with the following. - if ($dir[strlen($dir) - 1] != '/') { - $file = basename($dir); - $dir = dirname($dir); - } - - if ($dir == '.' || $dir == $this->pwd) { - return $this->pwd . $file; - } - - if ($dir[0] != '/') { - $dir = $this->pwd . '/' . $dir; - } - // on the surface it seems like maybe resolving a path beginning with / is unnecessary, but such paths - // can contain .'s and ..'s just like any other. we could parse those out as appropriate or we can let - // the server do it. we'll do the latter. - } - - /* - that SSH_FXP_REALPATH returns SSH_FXP_NAME does not necessarily mean that anything actually exists at the - specified path. generally speaking, no attributes are returned with this particular SSH_FXP_NAME packet - regardless of whether or not a file actually exists. and in SFTPv3, the longname field and the filename - field match for this particular SSH_FXP_NAME packet. for other SSH_FXP_NAME packets, this will likely - not be the case, but for this one, it is. - */ - // http://tools.ietf.org/html/draft-ietf-secsh-filexfer-13#section-8.9 - if (!$this->_send_sftp_packet(NET_SFTP_REALPATH, pack('Na*', strlen($dir), $dir))) { - return false; - } - - $response = $this->_get_sftp_packet(); - switch ($this->packet_type) { - case NET_SFTP_NAME: - // although SSH_FXP_NAME is implemented differently in SFTPv3 than it is in SFTPv4+, the following - // should work on all SFTP versions since the only part of the SSH_FXP_NAME packet the following looks - // at is the first part and that part is defined the same in SFTP versions 3 through 6. - $this->_string_shift($response, 4); // skip over the count - it should be 1, anyway - extract(unpack('Nlength', $this->_string_shift($response, 4))); - $realpath = $this->_string_shift($response, $length); - break; - case NET_SFTP_STATUS: - extract(unpack('Nstatus/Nlength', $this->_string_shift($response, 8))); - $this->sftp_errors[] = $this->status_codes[$status] . ': ' . $this->_string_shift($response, $length); - return false; - default: - user_error('Expected SSH_FXP_NAME or SSH_FXP_STATUS', E_USER_NOTICE); - return false; - } - - // if $this->pwd isn't set than the only thing $realpath could be is for '.', which is pretty much guaranteed to - // be a bonafide directory - return $realpath . '/' . $file; - } - - /** - * Changes the current directory - * - * @param String $dir - * @return Boolean - * @access public - */ - function chdir($dir) - { - if (!($this->bitmap & NET_SSH2_MASK_LOGIN)) { - return false; - } - - if ($dir[strlen($dir) - 1] != '/') { - $dir.= '/'; - } - $dir = $this->_realpath($dir); - - // confirm that $dir is, in fact, a valid directory - if (!$this->_send_sftp_packet(NET_SFTP_OPENDIR, pack('Na*', strlen($dir), $dir))) { - return false; - } - - // see Net_SFTP::nlist() for a more thorough explanation of the following - $response = $this->_get_sftp_packet(); - switch ($this->packet_type) { - case NET_SFTP_HANDLE: - $handle = substr($response, 4); - break; - case NET_SFTP_STATUS: - extract(unpack('Nstatus/Nlength', $this->_string_shift($response, 8))); - $this->sftp_errors[] = $this->status_codes[$status] . ': ' . $this->_string_shift($response, $length); - return false; - default: - user_error('Expected SSH_FXP_HANDLE or SSH_FXP_STATUS', E_USER_NOTICE); - return false; - } - - if (!$this->_send_sftp_packet(NET_SFTP_CLOSE, pack('Na*', strlen($handle), $handle))) { - return false; - } - - $response = $this->_get_sftp_packet(); - if ($this->packet_type != NET_SFTP_STATUS) { - user_error('Expected SSH_FXP_STATUS', E_USER_NOTICE); - return false; - } - - extract(unpack('Nstatus', $this->_string_shift($response, 4))); - if ($status != NET_SFTP_STATUS_OK) { - extract(unpack('Nlength', $this->_string_shift($response, 4))); - $this->sftp_errors[] = $this->status_codes[$status] . ': ' . $this->_string_shift($response, $length); - return false; - } - - $this->pwd = $dir; - return true; - } - - /** - * Returns a list of files in the given directory - * - * @param optional String $dir - * @return Mixed - * @access public - */ - function nlist($dir = '.') - { - return $this->_list($dir, false); - } - - /** - * Returns a list of files in the given directory - * - * @param optional String $dir - * @return Mixed - * @access public - */ - function rawlist($dir = '.') - { - return $this->_list($dir, true); - } - - function _list($dir, $raw = true) - { - if (!($this->bitmap & NET_SSH2_MASK_LOGIN)) { - return false; - } - - $dir = $this->_realpath($dir); - if ($dir === false) { - return false; - } - - // http://tools.ietf.org/html/draft-ietf-secsh-filexfer-13#section-8.1.2 - if (!$this->_send_sftp_packet(NET_SFTP_OPENDIR, pack('Na*', strlen($dir), $dir))) { - return false; - } - - $response = $this->_get_sftp_packet(); - switch ($this->packet_type) { - case NET_SFTP_HANDLE: - // http://tools.ietf.org/html/draft-ietf-secsh-filexfer-13#section-9.2 - // since 'handle' is the last field in the SSH_FXP_HANDLE packet, we'll just remove the first four bytes that - // represent the length of the string and leave it at that - $handle = substr($response, 4); - break; - case NET_SFTP_STATUS: - // presumably SSH_FX_NO_SUCH_FILE or SSH_FX_PERMISSION_DENIED - extract(unpack('Nstatus/Nlength', $this->_string_shift($response, 8))); - $this->sftp_errors[] = $this->status_codes[$status] . ': ' . $this->_string_shift($response, $length); - return false; - default: - user_error('Expected SSH_FXP_HANDLE or SSH_FXP_STATUS', E_USER_NOTICE); - return false; - } - - $contents = array(); - while (true) { - // http://tools.ietf.org/html/draft-ietf-secsh-filexfer-13#section-8.2.2 - // why multiple SSH_FXP_READDIR packets would be sent when the response to a single one can span arbitrarily many - // SSH_MSG_CHANNEL_DATA messages is not known to me. - if (!$this->_send_sftp_packet(NET_SFTP_READDIR, pack('Na*', strlen($handle), $handle))) { - return false; - } - - $response = $this->_get_sftp_packet(); - switch ($this->packet_type) { - case NET_SFTP_NAME: - extract(unpack('Ncount', $this->_string_shift($response, 4))); - for ($i = 0; $i < $count; $i++) { - extract(unpack('Nlength', $this->_string_shift($response, 4))); - $shortname = $this->_string_shift($response, $length); - extract(unpack('Nlength', $this->_string_shift($response, 4))); - $this->_string_shift($response, $length); // SFTPv4+ drop this field - the "longname" field - $attributes = $this->_parseAttributes($response); // we also don't care about the attributes - if (!$raw) { - $contents[] = $shortname; - } else { - $contents[$shortname] = $attributes; - } - // SFTPv6 has an optional boolean end-of-list field, but we'll ignore that, since the - // final SSH_FXP_STATUS packet should tell us that, already. - } - break; - case NET_SFTP_STATUS: - extract(unpack('Nstatus', $this->_string_shift($response, 4))); - if ($status != NET_SFTP_STATUS_EOF) { - extract(unpack('Nlength', $this->_string_shift($response, 4))); - $this->sftp_errors[] = $this->status_codes[$status] . ': ' . $this->_string_shift($response, $length); - return false; - } - break 2; - default: - user_error('Expected SSH_FXP_NAME or SSH_FXP_STATUS', E_USER_NOTICE); - return false; - } - } - - if (!$this->_send_sftp_packet(NET_SFTP_CLOSE, pack('Na*', strlen($handle), $handle))) { - return false; - } - - // "The client MUST release all resources associated with the handle regardless of the status." - // -- http://tools.ietf.org/html/draft-ietf-secsh-filexfer-13#section-8.1.3 - $response = $this->_get_sftp_packet(); - if ($this->packet_type != NET_SFTP_STATUS) { - user_error('Expected SSH_FXP_STATUS', E_USER_NOTICE); - return false; - } - - extract(unpack('Nstatus', $this->_string_shift($response, 4))); - if ($status != NET_SFTP_STATUS_OK) { - extract(unpack('Nlength', $this->_string_shift($response, 4))); - $this->sftp_errors[] = $this->status_codes[$status] . ': ' . $this->_string_shift($response, $length); - return false; - } - - return $contents; - } - - /** - * Returns the file size, in bytes, or false, on failure - * - * Files larger than 4GB will show up as being exactly 4GB. - * - * @param optional String $dir - * @return Mixed - * @access public - */ - function size($filename) - { - if (!($this->bitmap & NET_SSH2_MASK_LOGIN)) { - return false; - } - - $filename = $this->_realpath($filename); - if ($filename === false) { - return false; - } - - // SFTPv4+ adds an additional 32-bit integer field - flags - to the following: - $packet = pack('Na*', strlen($filename), $filename); - if (!$this->_send_sftp_packet(NET_SFTP_STAT, $packet)) { - return false; - } - - $response = $this->_get_sftp_packet(); - switch ($this->packet_type) { - case NET_SFTP_ATTRS: - $attrs = $this->_parseAttributes($response); - return $attrs['size']; - case NET_SFTP_STATUS: - extract(unpack('Nstatus/Nlength', $this->_string_shift($response, 8))); - $this->sftp_errors[] = $this->status_codes[$status] . ': ' . $this->_string_shift($response, $length); - return false; - } - - user_error('Expected SSH_FXP_ATTRS or SSH_FXP_STATUS', E_USER_NOTICE); - return false; - } - - /** - * Set permissions on a file. - * - * Returns the new file permissions on success or FALSE on error. - * - * @param Integer $mode - * @param String $filename - * @return Mixed - * @access public - */ - function chmod($mode, $filename) - { - if (!($this->bitmap & NET_SSH2_MASK_LOGIN)) { - return false; - } - - $filename = $this->_realpath($filename); - if ($filename === false) { - return false; - } - - // SFTPv4+ has an additional byte field - type - that would need to be sent, as well. setting it to - // SSH_FILEXFER_TYPE_UNKNOWN might work. if not, we'd have to do an SSH_FXP_STAT before doing an SSH_FXP_SETSTAT. - $attr = pack('N2', NET_SFTP_ATTR_PERMISSIONS, $mode & 07777); - if (!$this->_send_sftp_packet(NET_SFTP_SETSTAT, pack('Na*a*', strlen($filename), $filename, $attr))) { - return false; - } - - /* - "Because some systems must use separate system calls to set various attributes, it is possible that a failure - response will be returned, but yet some of the attributes may be have been successfully modified. If possible, - servers SHOULD avoid this situation; however, clients MUST be aware that this is possible." - - -- http://tools.ietf.org/html/draft-ietf-secsh-filexfer-13#section-8.6 - */ - $response = $this->_get_sftp_packet(); - if ($this->packet_type != NET_SFTP_STATUS) { - user_error('Expected SSH_FXP_STATUS', E_USER_NOTICE); - return false; - } - - extract(unpack('Nstatus', $this->_string_shift($response, 4))); - if ($status != NET_SFTP_STATUS_EOF) { - extract(unpack('Nlength', $this->_string_shift($response, 4))); - $this->sftp_errors[] = $this->status_codes[$status] . ': ' . $this->_string_shift($response, $length); - } - - // rather than return what the permissions *should* be, we'll return what they actually are. this will also - // tell us if the file actually exists. - // incidentally, SFTPv4+ adds an additional 32-bit integer field - flags - to the following: - $packet = pack('Na*', strlen($filename), $filename); - if (!$this->_send_sftp_packet(NET_SFTP_STAT, $packet)) { - return false; - } - - $response = $this->_get_sftp_packet(); - switch ($this->packet_type) { - case NET_SFTP_ATTRS: - $attrs = $this->_parseAttributes($response); - return $attrs['permissions']; - case NET_SFTP_STATUS: - extract(unpack('Nstatus/Nlength', $this->_string_shift($response, 8))); - $this->sftp_errors[] = $this->status_codes[$status] . ': ' . $this->_string_shift($response, $length); - return false; - } - - user_error('Expected SSH_FXP_ATTRS or SSH_FXP_STATUS', E_USER_NOTICE); - return false; - } - - /** - * Creates a directory. - * - * @param String $dir - * @return Boolean - * @access public - */ - function mkdir($dir) - { - if (!($this->bitmap & NET_SSH2_MASK_LOGIN)) { - return false; - } - - $dir = $this->_realpath(rtrim($dir, '/')); - if ($dir === false) { - return false; - } - - // by not providing any permissions, hopefully the server will use the logged in users umask - their - // default permissions. - if (!$this->_send_sftp_packet(NET_SFTP_MKDIR, pack('Na*N', strlen($dir), $dir, 0))) { - return false; - } - - $response = $this->_get_sftp_packet(); - if ($this->packet_type != NET_SFTP_STATUS) { - user_error('Expected SSH_FXP_STATUS', E_USER_NOTICE); - return false; - } - - extract(unpack('Nstatus', $this->_string_shift($response, 4))); - if ($status != NET_SFTP_STATUS_OK) { - extract(unpack('Nlength', $this->_string_shift($response, 4))); - $this->sftp_errors[] = $this->status_codes[$status] . ': ' . $this->_string_shift($response, $length); - return false; - } - - return true; - } - - /** - * Removes a directory. - * - * @param String $dir - * @return Boolean - * @access public - */ - function rmdir($dir) - { - if (!($this->bitmap & NET_SSH2_MASK_LOGIN)) { - return false; - } - - $dir = $this->_realpath($dir); - if ($dir === false) { - return false; - } - - if (!$this->_send_sftp_packet(NET_SFTP_RMDIR, pack('Na*', strlen($dir), $dir))) { - return false; - } - - $response = $this->_get_sftp_packet(); - if ($this->packet_type != NET_SFTP_STATUS) { - user_error('Expected SSH_FXP_STATUS', E_USER_NOTICE); - return false; - } - - extract(unpack('Nstatus', $this->_string_shift($response, 4))); - if ($status != NET_SFTP_STATUS_OK) { - // presumably SSH_FX_NO_SUCH_FILE or SSH_FX_PERMISSION_DENIED? - extract(unpack('Nlength', $this->_string_shift($response, 4))); - $this->sftp_errors[] = $this->status_codes[$status] . ': ' . $this->_string_shift($response, $length); - return false; - } - - return true; - } - - /** - * Uploads a file to the SFTP server. - * - * By default, Net_SFTP::put() does not read from the local filesystem. $data is dumped directly into $remote_file. - * So, for example, if you set $data to 'filename.ext' and then do Net_SFTP::get(), you will get a file, twelve bytes - * long, containing 'filename.ext' as its contents. - * - * Setting $mode to NET_SFTP_LOCAL_FILE will change the above behavior. With NET_SFTP_LOCAL_FILE, $remote_file will - * contain as many bytes as filename.ext does on your local filesystem. If your filename.ext is 1MB then that is how - * large $remote_file will be, as well. - * - * Currently, only binary mode is supported. As such, if the line endings need to be adjusted, you will need to take - * care of that, yourself. - * - * @param String $remote_file - * @param String $data - * @param optional Integer $flags - * @return Boolean - * @access public - * @internal ASCII mode for SFTPv4/5/6 can be supported by adding a new function - Net_SFTP::setMode(). - */ - function put($remote_file, $data, $mode = NET_SFTP_STRING) - { - if (!($this->bitmap & NET_SSH2_MASK_LOGIN)) { - return false; - } - - $remote_file = $this->_realpath($remote_file); - if ($remote_file === false) { - return false; - } - - $packet = pack('Na*N2', strlen($remote_file), $remote_file, NET_SFTP_OPEN_WRITE | NET_SFTP_OPEN_CREATE | NET_SFTP_OPEN_TRUNCATE, 0); - if (!$this->_send_sftp_packet(NET_SFTP_OPEN, $packet)) { - return false; - } - - $response = $this->_get_sftp_packet(); - switch ($this->packet_type) { - case NET_SFTP_HANDLE: - $handle = substr($response, 4); - break; - case NET_SFTP_STATUS: - extract(unpack('Nstatus/Nlength', $this->_string_shift($response, 8))); - $this->sftp_errors[] = $this->status_codes[$status] . ': ' . $this->_string_shift($response, $length); - return false; - default: - user_error('Expected SSH_FXP_HANDLE or SSH_FXP_STATUS', E_USER_NOTICE); - return false; - } - - $initialize = true; - - // http://tools.ietf.org/html/draft-ietf-secsh-filexfer-13#section-8.2.3 - if ($mode == NET_SFTP_LOCAL_FILE) { - if (!is_file($data)) { - user_error("$data is not a valid file", E_USER_NOTICE); - return false; - } - $fp = fopen($data, 'rb'); - if (!$fp) { - return false; - } - $sent = 0; - $size = filesize($data); - } else { - $sent = 0; - $size = strlen($data); - } - - $size = $size < 0 ? ($size & 0x7FFFFFFF) + 0x80000000 : $size; - - $sftp_packet_size = 34000; // PuTTY uses 4096 - $i = 0; - while ($sent < $size) { - $temp = $mode == NET_SFTP_LOCAL_FILE ? fread($fp, $sftp_packet_size) : $this->_string_shift($data, $sftp_packet_size); - $packet = pack('Na*N3a*', strlen($handle), $handle, 0, $sent, strlen($temp), $temp); - if (!$this->_send_sftp_packet(NET_SFTP_WRITE, $packet)) { - fclose($fp); - return false; - } - $sent+= strlen($temp); - - $i++; - - if ($i == 50) { - if (!$this->_read_put_responses($i)) { - $i = 0; - break; - } - $i = 0; - } - } - - $this->_read_put_responses($i); - - if ($mode == NET_SFTP_LOCAL_FILE) { - fclose($fp); - } - - if (!$this->_send_sftp_packet(NET_SFTP_CLOSE, pack('Na*', strlen($handle), $handle))) { - return false; - } - - $response = $this->_get_sftp_packet(); - if ($this->packet_type != NET_SFTP_STATUS) { - user_error('Expected SSH_FXP_STATUS', E_USER_NOTICE); - return false; - } - - extract(unpack('Nstatus', $this->_string_shift($response, 4))); - if ($status != NET_SFTP_STATUS_OK) { - extract(unpack('Nlength', $this->_string_shift($response, 4))); - $this->sftp_errors[] = $this->status_codes[$status] . ': ' . $this->_string_shift($response, $length); - return false; - } - - return true; - } - - /** - * Reads multiple successive SSH_FXP_WRITE responses - * - * Sending an SSH_FXP_WRITE packet and immediately reading its response isn't as efficient as blindly sending out $i - * SSH_FXP_WRITEs, in succession, and then reading $i responses. - * - * @param Integer $i - * @return Boolean - * @access private - */ - function _read_put_responses($i) - { - while ($i--) { - $response = $this->_get_sftp_packet(); - if ($this->packet_type != NET_SFTP_STATUS) { - user_error('Expected SSH_FXP_STATUS', E_USER_NOTICE); - return false; - } - - extract(unpack('Nstatus', $this->_string_shift($response, 4))); - if ($status != NET_SFTP_STATUS_OK) { - extract(unpack('Nlength', $this->_string_shift($response, 4))); - $this->sftp_errors[] = $this->status_codes[$status] . ': ' . $this->_string_shift($response, $length); - break; - } - } - - return $i < 0; - } - - /** - * Downloads a file from the SFTP server. - * - * Returns a string containing the contents of $remote_file if $local_file is left undefined or a boolean false if - * the operation was unsuccessful. If $local_file is defined, returns true or false depending on the success of the - * operation - * - * @param String $remote_file - * @param optional String $local_file - * @return Mixed - * @access public - */ - function get($remote_file, $local_file = false) - { - if (!($this->bitmap & NET_SSH2_MASK_LOGIN)) { - return false; - } - - $remote_file = $this->_realpath($remote_file); - if ($remote_file === false) { - return false; - } - - $packet = pack('Na*N2', strlen($remote_file), $remote_file, NET_SFTP_OPEN_READ, 0); - if (!$this->_send_sftp_packet(NET_SFTP_OPEN, $packet)) { - return false; - } - - $response = $this->_get_sftp_packet(); - switch ($this->packet_type) { - case NET_SFTP_HANDLE: - $handle = substr($response, 4); - break; - case NET_SFTP_STATUS: // presumably SSH_FX_NO_SUCH_FILE or SSH_FX_PERMISSION_DENIED - extract(unpack('Nstatus/Nlength', $this->_string_shift($response, 8))); - $this->sftp_errors[] = $this->status_codes[$status] . ': ' . $this->_string_shift($response, $length); - return false; - default: - user_error('Expected SSH_FXP_HANDLE or SSH_FXP_STATUS', E_USER_NOTICE); - return false; - } - - $packet = pack('Na*', strlen($handle), $handle); - if (!$this->_send_sftp_packet(NET_SFTP_FSTAT, $packet)) { - return false; - } - - $response = $this->_get_sftp_packet(); - switch ($this->packet_type) { - case NET_SFTP_ATTRS: - $attrs = $this->_parseAttributes($response); - break; - case NET_SFTP_STATUS: - extract(unpack('Nstatus/Nlength', $this->_string_shift($response, 8))); - $this->sftp_errors[] = $this->status_codes[$status] . ': ' . $this->_string_shift($response, $length); - return false; - default: - user_error('Expected SSH_FXP_ATTRS or SSH_FXP_STATUS', E_USER_NOTICE); - return false; - } - - if ($local_file !== false) { - $fp = fopen($local_file, 'wb'); - if (!$fp) { - return false; - } - } else { - $content = ''; - } - - $read = 0; - while ($read < $attrs['size']) { - $packet = pack('Na*N3', strlen($handle), $handle, 0, $read, 1 << 20); - if (!$this->_send_sftp_packet(NET_SFTP_READ, $packet)) { - return false; - } - - $response = $this->_get_sftp_packet(); - switch ($this->packet_type) { - case NET_SFTP_DATA: - $temp = substr($response, 4); - $read+= strlen($temp); - if ($local_file === false) { - $content.= $temp; - } else { - fputs($fp, $temp); - } - break; - case NET_SFTP_STATUS: - extract(unpack('Nstatus/Nlength', $this->_string_shift($response, 8))); - $this->sftp_errors[] = $this->status_codes[$status] . ': ' . $this->_string_shift($response, $length); - break 2; - default: - user_error('Expected SSH_FXP_DATA or SSH_FXP_STATUS', E_USER_NOTICE); - return false; - } - } - - if (!$this->_send_sftp_packet(NET_SFTP_CLOSE, pack('Na*', strlen($handle), $handle))) { - return false; - } - - $response = $this->_get_sftp_packet(); - if ($this->packet_type != NET_SFTP_STATUS) { - user_error('Expected SSH_FXP_STATUS', E_USER_NOTICE); - return false; - } - - extract(unpack('Nstatus', $this->_string_shift($response, 4))); - if ($status != NET_SFTP_STATUS_OK) { - extract(unpack('Nlength', $this->_string_shift($response, 4))); - $this->sftp_errors[] = $this->status_codes[$status] . ': ' . $this->_string_shift($response, $length); - return false; - } - - if (isset($content)) { - return $content; - } - - fclose($fp); - return true; - } - - /** - * Deletes a file on the SFTP server. - * - * @param String $path - * @return Boolean - * @access public - */ - function delete($path) - { - if (!($this->bitmap & NET_SSH2_MASK_LOGIN)) { - return false; - } - - $remote_file = $this->_realpath($path); - if ($path === false) { - return false; - } - - // http://tools.ietf.org/html/draft-ietf-secsh-filexfer-13#section-8.3 - if (!$this->_send_sftp_packet(NET_SFTP_REMOVE, pack('Na*', strlen($path), $path))) { - return false; - } - - $response = $this->_get_sftp_packet(); - if ($this->packet_type != NET_SFTP_STATUS) { - user_error('Expected SSH_FXP_STATUS', E_USER_NOTICE); - return false; - } - - // if $status isn't SSH_FX_OK it's probably SSH_FX_NO_SUCH_FILE or SSH_FX_PERMISSION_DENIED - extract(unpack('Nstatus', $this->_string_shift($response, 4))); - if ($status != NET_SFTP_STATUS_OK) { - extract(unpack('Nlength', $this->_string_shift($response, 4))); - $this->sftp_errors[] = $this->status_codes[$status] . ': ' . $this->_string_shift($response, $length); - return false; - } - - return true; - } - - /** - * Renames a file or a directory on the SFTP server - * - * @param String $oldname - * @param String $newname - * @return Boolean - * @access public - */ - function rename($oldname, $newname) - { - if (!($this->bitmap & NET_SSH2_MASK_LOGIN)) { - return false; - } - - $oldname = $this->_realpath($oldname); - $newname = $this->_realpath($newname); - if ($oldname === false || $newname === false) { - return false; - } - - // http://tools.ietf.org/html/draft-ietf-secsh-filexfer-13#section-8.3 - $packet = pack('Na*Na*', strlen($oldname), $oldname, strlen($newname), $newname); - if (!$this->_send_sftp_packet(NET_SFTP_RENAME, $packet)) { - return false; - } - - $response = $this->_get_sftp_packet(); - if ($this->packet_type != NET_SFTP_STATUS) { - user_error('Expected SSH_FXP_STATUS', E_USER_NOTICE); - return false; - } - - // if $status isn't SSH_FX_OK it's probably SSH_FX_NO_SUCH_FILE or SSH_FX_PERMISSION_DENIED - extract(unpack('Nstatus', $this->_string_shift($response, 4))); - if ($status != NET_SFTP_STATUS_OK) { - extract(unpack('Nlength', $this->_string_shift($response, 4))); - $this->sftp_errors[] = $this->status_codes[$status] . ': ' . $this->_string_shift($response, $length); - return false; - } - - return true; - } - - /** - * Parse Attributes - * - * See '7. File Attributes' of draft-ietf-secsh-filexfer-13 for more info. - * - * @param String $response - * @return Array - * @access private - */ - function _parseAttributes(&$response) - { - $attr = array(); - extract(unpack('Nflags', $this->_string_shift($response, 4))); - // SFTPv4+ have a type field (a byte) that follows the above flag field - foreach ($this->attributes as $key => $value) { - switch ($flags & $key) { - case NET_SFTP_ATTR_SIZE: // 0x00000001 - // size is represented by a 64-bit integer, so we perhaps ought to be doing the following: - // $attr['size'] = new Math_BigInteger($this->_string_shift($response, 8), 256); - // of course, you shouldn't be using Net_SFTP to transfer files that are in excess of 4GB - // (0xFFFFFFFF bytes), anyway. as such, we'll just represent all file sizes that are bigger than - // 4GB as being 4GB. - extract(unpack('Nupper/Nsize', $this->_string_shift($response, 8))); - if ($upper) { - $attr['size'] = 0xFFFFFFFF; - } else { - $attr['size'] = $size < 0 ? ($size & 0x7FFFFFFF) + 0x80000000 : $size; - } - break; - case NET_SFTP_ATTR_UIDGID: // 0x00000002 (SFTPv3 only) - $attr+= unpack('Nuid/Ngid', $this->_string_shift($response, 8)); - break; - case NET_SFTP_ATTR_PERMISSIONS: // 0x00000004 - $attr+= unpack('Npermissions', $this->_string_shift($response, 4)); - break; - case NET_SFTP_ATTR_ACCESSTIME: // 0x00000008 - $attr+= unpack('Natime/Nmtime', $this->_string_shift($response, 8)); - break; - case NET_SFTP_ATTR_EXTENDED: // 0x80000000 - extract(unpack('Ncount', $this->_string_shift($response, 4))); - for ($i = 0; $i < $count; $i++) { - extract(unpack('Nlength', $this->_string_shift($response, 4))); - $key = $this->_string_shift($response, $length); - extract(unpack('Nlength', $this->_string_shift($response, 4))); - $attr[$key] = $this->_string_shift($response, $length); - } - } - } - return $attr; - } - - /** - * Sends SFTP Packets - * - * See '6. General Packet Format' of draft-ietf-secsh-filexfer-13 for more info. - * - * @param Integer $type - * @param String $data - * @see Net_SFTP::_get_sftp_packet() - * @see Net_SSH2::_send_channel_packet() - * @return Boolean - * @access private - */ - function _send_sftp_packet($type, $data) - { - $packet = $this->request_id !== false ? - pack('NCNa*', strlen($data) + 5, $type, $this->request_id, $data) : - pack('NCa*', strlen($data) + 1, $type, $data); - - $start = strtok(microtime(), ' ') + strtok(''); // http://php.net/microtime#61838 - $result = $this->_send_channel_packet(NET_SFTP_CHANNEL, $packet); - $stop = strtok(microtime(), ' ') + strtok(''); - - if (defined('NET_SFTP_LOGGING')) { - $this->packet_type_log[] = '-> ' . $this->packet_types[$type] . - ' (' . round($stop - $start, 4) . 's)'; - if (NET_SFTP_LOGGING == NET_SFTP_LOG_COMPLEX) { - $this->packet_log[] = $data; - } - } - - return $result; - } - - /** - * Receives SFTP Packets - * - * See '6. General Packet Format' of draft-ietf-secsh-filexfer-13 for more info. - * - * Incidentally, the number of SSH_MSG_CHANNEL_DATA messages has no bearing on the number of SFTP packets present. - * There can be one SSH_MSG_CHANNEL_DATA messages containing two SFTP packets or there can be two SSH_MSG_CHANNEL_DATA - * messages containing one SFTP packet. - * - * @see Net_SFTP::_send_sftp_packet() - * @return String - * @access private - */ - function _get_sftp_packet() - { - $start = strtok(microtime(), ' ') + strtok(''); // http://php.net/microtime#61838 - - // SFTP packet length - while (strlen($this->packet_buffer) < 4) { - $temp = $this->_get_channel_packet(NET_SFTP_CHANNEL); - if (is_bool($temp)) { - $this->packet_type = false; - $this->packet_buffer = ''; - return false; - } - $this->packet_buffer.= $temp; - } - extract(unpack('Nlength', $this->_string_shift($this->packet_buffer, 4))); - $tempLength = $length; - $tempLength-= strlen($this->packet_buffer); - - // SFTP packet type and data payload - while ($tempLength > 0) { - $temp = $this->_get_channel_packet(NET_SFTP_CHANNEL); - if (is_bool($temp)) { - $this->packet_type = false; - $this->packet_buffer = ''; - return false; - } - $this->packet_buffer.= $temp; - $tempLength-= strlen($temp); - } - - $stop = strtok(microtime(), ' ') + strtok(''); - - $this->packet_type = ord($this->_string_shift($this->packet_buffer)); - - if ($this->request_id !== false) { - $this->_string_shift($this->packet_buffer, 4); // remove the request id - $length-= 5; // account for the request id and the packet type - } else { - $length-= 1; // account for the packet type - } - - $packet = $this->_string_shift($this->packet_buffer, $length); - - if (defined('NET_SFTP_LOGGING')) { - $this->packet_type_log[] = '<- ' . $this->packet_types[$this->packet_type] . - ' (' . round($stop - $start, 4) . 's)'; - if (NET_SFTP_LOGGING == NET_SFTP_LOG_COMPLEX) { - $this->packet_log[] = $packet; - } - } - - return $packet; - } - - /** - * Returns a log of the packets that have been sent and received. - * - * Returns a string if NET_SFTP_LOGGING == NET_SFTP_LOG_COMPLEX, an array if NET_SFTP_LOGGING == NET_SFTP_LOG_SIMPLE and false if !defined('NET_SFTP_LOGGING') - * - * @access public - * @return String or Array - */ - function getSFTPLog() - { - if (!defined('NET_SFTP_LOGGING')) { - return false; - } - - switch (NET_SFTP_LOGGING) { - case NET_SFTP_LOG_COMPLEX: - return $this->_format_log($this->packet_log, $this->packet_type_log); - break; - //case NET_SFTP_LOG_SIMPLE: - default: - return $this->packet_type_log; - } - } - - /** - * Returns all errors - * - * @return String - * @access public - */ - function getSFTPErrors() - { - return $this->sftp_errors; - } - - /** - * Returns the last error - * - * @return String - * @access public - */ - function getLastSFTPError() - { - return $this->sftp_errors[count($this->sftp_errors) - 1]; - } - - /** - * Get supported SFTP versions - * - * @return Array - * @access public - */ - function getSupportedVersions() - { - $temp = array('version' => $this->version); - if (isset($this->extensions['versions'])) { - $temp['extensions'] = $this->extensions['versions']; - } - return $temp; - } - - /** - * Disconnect - * - * @param Integer $reason - * @return Boolean - * @access private - */ - function _disconnect($reason) - { - $this->pwd = false; - parent::_disconnect($reason); - } -} \ No newline at end of file diff --git a/phpsec/Net/SSH1.php b/phpsec/Net/SSH1.php deleted file mode 100644 index 6986a8450..000000000 --- a/phpsec/Net/SSH1.php +++ /dev/null @@ -1,1160 +0,0 @@ - - * login('username', 'password')) { - * exit('Login Failed'); - * } - * - * while (true) { - * echo $ssh->interactiveRead(); - * - * $read = array(STDIN); - * $write = $except = NULL; - * if (stream_select($read, $write, $except, 0)) { - * $ssh->interactiveWrite(fread(STDIN, 1)); - * } - * } - * ?> - * - * - * Here's another short example: - * - * login('username', 'password')) { - * exit('Login Failed'); - * } - * - * echo $ssh->exec('ls -la'); - * ?> - * - * - * 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: This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; either - * version 2.1 of the License, or (at your option) any later version. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with this library; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, - * MA 02111-1307 USA - * - * @category Net - * @package Net_SSH1 - * @author Jim Wigginton - * @copyright MMVII Jim Wigginton - * @license http://www.gnu.org/licenses/lgpl.txt - * @version $Id: SSH1.php,v 1.15 2010/03/22 22:01:38 terrafrost Exp $ - * @link http://phpseclib.sourceforge.net - */ - -/** - * Include Math_BigInteger - * - * Used to do RSA encryption. - */ -require_once('Math/BigInteger.php'); - -/** - * Include Crypt_Null - */ -//require_once('Crypt/Null.php'); - -/** - * Include Crypt_DES - */ -require_once('Crypt/DES.php'); - -/** - * Include Crypt_TripleDES - */ -require_once('Crypt/TripleDES.php'); - -/** - * Include Crypt_RC4 - */ -require_once('Crypt/RC4.php'); - -/** - * Include Crypt_Random - */ -require_once('Crypt/Random.php'); - -/**#@+ - * Protocol Flags - * - * @access private - */ -define('NET_SSH1_MSG_DISCONNECT', 1); -define('NET_SSH1_SMSG_PUBLIC_KEY', 2); -define('NET_SSH1_CMSG_SESSION_KEY', 3); -define('NET_SSH1_CMSG_USER', 4); -define('NET_SSH1_CMSG_AUTH_PASSWORD', 9); -define('NET_SSH1_CMSG_REQUEST_PTY', 10); -define('NET_SSH1_CMSG_EXEC_SHELL', 12); -define('NET_SSH1_CMSG_EXEC_CMD', 13); -define('NET_SSH1_SMSG_SUCCESS', 14); -define('NET_SSH1_SMSG_FAILURE', 15); -define('NET_SSH1_CMSG_STDIN_DATA', 16); -define('NET_SSH1_SMSG_STDOUT_DATA', 17); -define('NET_SSH1_SMSG_STDERR_DATA', 18); -define('NET_SSH1_SMSG_EXITSTATUS', 20); -define('NET_SSH1_CMSG_EXIT_CONFIRMATION', 33); -/**#@-*/ - -/**#@+ - * Encryption Methods - * - * @see Net_SSH1::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 Net_SSH1::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 Net_SSH1::_get_binary_packet() - * @access private - */ -define('NET_SSH1_RESPONSE_TYPE', 1); - -/** - * The Response Data - * - * @see Net_SSH1::_get_binary_packet() - * @access private - */ -define('NET_SSH1_RESPONSE_DATA', 2); - -/**#@+ - * Execution Bitmap Masks - * - * @see Net_SSH1::bitmap - * @access private - */ -define('NET_SSH1_MASK_CONSTRUCTOR', 0x00000001); -define('NET_SSH1_MASK_LOGIN', 0x00000002); -define('NET_SSH1_MASK_SHELL', 0x00000004); -/**#@-*/ - -/** - * Pure-PHP implementation of SSHv1. - * - * @author Jim Wigginton - * @version 0.1.0 - * @access public - * @package Net_SSH1 - */ -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 reprsent functions that have been called already. This is used to determine - * if a requisite function has been successfully executed. If not, an error should be thrown. - * - * @var Integer - * @access private - */ - var $bitmap = 0; - - /** - * The Server Key Public Exponent - * - * Logged for debug purposes - * - * @see Net_SSH1::getServerKeyPublicExponent() - * @var String - * @access private - */ - var $server_key_public_exponent; - - /** - * The Server Key Public Modulus - * - * Logged for debug purposes - * - * @see Net_SSH1::getServerKeyPublicModulus() - * @var String - * @access private - */ - var $server_key_public_modulus; - - /** - * The Host Key Public Exponent - * - * Logged for debug purposes - * - * @see Net_SSH1::getHostKeyPublicExponent() - * @var String - * @access private - */ - var $host_key_public_exponent; - - /** - * The Host Key Public Modulus - * - * Logged for debug purposes - * - * @see Net_SSH1::getHostKeyPublicModulus() - * @var String - * @access private - */ - var $host_key_public_modulus; - - /** - * Supported Ciphers - * - * Logged for debug purposes - * - * @see Net_SSH1::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 Net_SSH1::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 Net_SSH1::getServerIdentification() - * @var String - * @access private - */ - var $server_identification = ''; - - /** - * Default Constructor. - * - * Connects to an SSHv1 server - * - * @param String $host - * @param optional Integer $port - * @param optional Integer $timeout - * @param optional Integer $cipher - * @return Net_SSH1 - * @access public - */ - function Net_SSH1($host, $port = 22, $timeout = 10, $cipher = NET_SSH1_CIPHER_3DES) - { - $this->fsock = @fsockopen($host, $port, $errno, $errstr, $timeout); - if (!$this->fsock) { - user_error(rtrim("Cannot connect to $host. Error $errno. $errstr"), E_USER_NOTICE); - return; - } - - $this->server_identification = $init_line = fgets($this->fsock, 255); - if (!preg_match('#SSH-([0-9\.]+)-(.+)#', $init_line, $parts)) { - user_error('Can only connect to SSH servers', E_USER_NOTICE); - return; - } - if ($parts[1][0] != 1) { - user_error("Cannot connect to SSH $parts[1] servers", E_USER_NOTICE); - return; - } - - fputs($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', E_USER_NOTICE); - return; - } - - $anti_spoofing_cookie = $this->_string_shift($response[NET_SSH1_RESPONSE_DATA], 8); - - $this->_string_shift($response[NET_SSH1_RESPONSE_DATA], 4); - - $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; - - $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); - - $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; - - $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 - 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 - 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)); - - $session_key = ''; - for ($i = 0; $i < 32; $i++) { - $session_key.= chr(crypt_random(0, 255)); - } - $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[$cipher]) ? $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($data)) { - user_error('Error sending SSH_CMSG_SESSION_KEY', E_USER_NOTICE); - return; - } - - switch ($cipher) { - //case NET_SSH1_CIPHER_NONE: - // $this->crypto = new Crypt_Null(); - // break; - case NET_SSH1_CIPHER_DES: - $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: - $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: - // $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', E_USER_NOTICE); - return; - } - - $this->bitmap = NET_SSH1_MASK_CONSTRUCTOR; - } - - /** - * Login - * - * @param String $username - * @param optional String $password - * @return Boolean - * @access public - */ - function login($username, $password = '') - { - if (!($this->bitmap & NET_SSH1_MASK_CONSTRUCTOR)) { - 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', E_USER_NOTICE); - return false; - } - - $response = $this->_get_binary_packet(); - - if ($response[NET_SSH1_RESPONSE_TYPE] == NET_SSH1_SMSG_SUCCESS) { - $this->bitmap |= NET_SSH1_MASK_LOGIN; - return true; - } else if ($response[NET_SSH1_RESPONSE_TYPE] != NET_SSH1_SMSG_FAILURE) { - user_error('Expected SSH_SMSG_SUCCESS or SSH_SMSG_FAILURE', E_USER_NOTICE); - 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', E_USER_NOTICE); - return false; - } - - $response = $this->_get_binary_packet(); - - if ($response[NET_SSH1_RESPONSE_TYPE] == NET_SSH1_SMSG_SUCCESS) { - $this->bitmap |= NET_SSH1_MASK_LOGIN; - return true; - } else if ($response[NET_SSH1_RESPONSE_TYPE] == NET_SSH1_SMSG_FAILURE) { - return false; - } else { - user_error('Expected SSH_SMSG_SUCCESS or SSH_SMSG_FAILURE', E_USER_NOTICE); - return false; - } - } - - /** - * 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 Net_SSH1::interactiveRead() - * @see Net_SSH1::interactiveWrite() - * @param String $cmd - * @return mixed - * @access public - */ - function exec($cmd) - { - if (!($this->bitmap & NET_SSH1_MASK_LOGIN)) { - user_error('Operation disallowed prior to login()', E_USER_NOTICE); - return false; - } - - // 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', E_USER_NOTICE); - return false; - } - - $response = $this->_get_binary_packet(); - - if ($response[NET_SSH1_RESPONSE_TYPE] != NET_SSH1_SMSG_SUCCESS) { - user_error('Expected SSH_SMSG_SUCCESS', E_USER_NOTICE); - 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', E_USER_NOTICE); - return false; - } - - $output = ''; - $response = $this->_get_binary_packet(); - - do { - $output.= substr($response[NET_SSH1_RESPONSE_DATA], 4); - $response = $this->_get_binary_packet(); - } while ($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 Net_SSH1::interactiveRead() - * @see Net_SSH1::interactiveWrite() - * @return Boolean - * @access private - */ - function _initShell() - { - $data = pack('CNa*N4C', NET_SSH1_CMSG_REQUEST_PTY, strlen('vt100'), 'vt100', 24, 80, 0, 0, NET_SSH1_TTY_OP_END); - - if (!$this->_send_binary_packet($data)) { - user_error('Error sending SSH_CMSG_REQUEST_PTY', E_USER_NOTICE); - return false; - } - - $response = $this->_get_binary_packet(); - - if ($response[NET_SSH1_RESPONSE_TYPE] != NET_SSH1_SMSG_SUCCESS) { - user_error('Expected SSH_SMSG_SUCCESS', E_USER_NOTICE); - return false; - } - - $data = pack('C', NET_SSH1_CMSG_EXEC_SHELL); - - if (!$this->_send_binary_packet($data)) { - user_error('Error sending SSH_CMSG_EXEC_SHELL', E_USER_NOTICE); - return false; - } - - $this->bitmap |= NET_SSH1_MASK_SHELL; - - //stream_set_blocking($this->fsock, 0); - - return true; - } - - /** - * Inputs a command into an interactive shell. - * - * @see Net_SSH1::interactiveRead() - * @param String $cmd - * @return Boolean - * @access public - */ - function interactiveWrite($cmd) - { - if (!($this->bitmap & NET_SSH1_MASK_LOGIN)) { - user_error('Operation disallowed prior to login()', E_USER_NOTICE); - return false; - } - - if (!($this->bitmap & NET_SSH1_MASK_SHELL) && !$this->_initShell()) { - user_error('Unable to initiate an interactive shell session', E_USER_NOTICE); - return false; - } - - $data = pack('CNa*', NET_SSH1_CMSG_STDIN_DATA, strlen($cmd), $cmd); - - if (!$this->_send_binary_packet($data)) { - user_error('Error sending SSH_CMSG_STDIN', E_USER_NOTICE); - return false; - } - - return true; - } - - /** - * Reads the output of an interactive shell. - * - * Requires PHP 4.3.0 or later due to the use of the stream_select() function. If you see stuff like - * "", you're seeing ANSI escape codes. According to - * {@link http://support.microsoft.com/kb/101875 How to Enable ANSI.SYS in a Command Window}, "Windows NT - * does not support ANSI escape sequences in Win32 Console applications", so if you're a Windows user, - * there's not going to be much recourse. - * - * @see Net_SSH1::interactiveRead() - * @return String - * @access public - */ - function interactiveRead() - { - if (!($this->bitmap & NET_SSH1_MASK_LOGIN)) { - user_error('Operation disallowed prior to login()', E_USER_NOTICE); - return false; - } - - if (!($this->bitmap & NET_SSH1_MASK_SHELL) && !$this->_initShell()) { - user_error('Unable to initiate an interactive shell session', E_USER_NOTICE); - 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) { - $data = pack('CNa*', NET_SSH1_MSG_DISCONNECT, strlen($msg), $msg); - $this->_send_binary_packet($data); - fclose($this->fsock); - $this->bitmap = 0; - } - } - - /** - * Gets Binary Packets - * - * See 'The Binary Packet Protocol' of protocol-1.5.txt for more info. - * - * Also, this function could be improved upon by adding detection for the following exploit: - * http://www.securiteam.com/securitynews/5LP042K3FY.html - * - * @see Net_SSH1::_send_binary_packet() - * @return Array - * @access private - */ - function _get_binary_packet() - { - if (feof($this->fsock)) { - //user_error('connection closed prematurely', E_USER_NOTICE); - return false; - } - - $temp = unpack('Nlength', fread($this->fsock, 4)); - - $padding_length = 8 - ($temp['length'] & 7); - $length = $temp['length'] + $padding_length; - - $raw = fread($this->fsock, $length); - - if ($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); - - $temp = unpack('Ncrc', substr($raw, -4)); - - //if ( $temp['crc'] != $this->_crc($padding . $type . $data) ) { - // user_error('Bad CRC in packet from server', E_USER_NOTICE); - // return false; - //} - - return array( - NET_SSH1_RESPONSE_TYPE => ord($type), - NET_SSH1_RESPONSE_DATA => $data - ); - } - - /** - * Sends Binary Packets - * - * Returns true on success, false on failure. - * - * @see Net_SSH1::_get_binary_packet() - * @param String $data - * @return Boolean - * @access private - */ - function _send_binary_packet($data) { - if (feof($this->fsock)) { - //user_error('connection closed prematurely', E_USER_NOTICE); - return false; - } - - $length = strlen($data) + 4; - - $padding_length = 8 - ($length & 7); - $padding = ''; - for ($i = 0; $i < $padding_length; $i++) { - $padding.= chr(crypt_random(0, 255)); - } - - $data = $padding . $data; - $data.= pack('N', $this->_crc($data)); - - if ($this->crypto !== false) { - $data = $this->crypto->encrypt($data); - } - - $packet = pack('Na*', $length, $data); - - return strlen($packet) == fputs($this->fsock, $packet); - } - - /** - * 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 Net_SSH1::_get_binary_packet() - * @see Net_SSH1::_send_binary_packet() - * @param String $data - * @return Integer - * @access private - */ - function _crc($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 optional Integer $index - * @return String - * @access private - */ - function _string_shift(&$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 Net_SSH1::Net_SSH1() - * @param Math_BigInteger $m - * @param Array $key - * @return Math_BigInteger - * @access private - */ - function _rsa_crypt($m, $key) - { - /* - if (!class_exists('Crypt_RSA')) { - require_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 - $temp = chr(0) . chr(2); - $modulus = $key[1]->toBytes(); - $length = strlen($modulus) - strlen($m) - 3; - for ($i = 0; $i < $length; $i++) { - $temp.= chr(crypt_random(1, 255)); - } - $temp.= chr(0) . $m; - - $m = new Math_BigInteger($temp, 256); - $m = $m->modPow($key[0], $key[1]); - - return $m->toBytes(); - } - - /** - * 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 optional Boolean $raw_output - * @return String - * @access public - */ - function getServerKeyPublicExponent($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 optional Boolean $raw_output - * @return String - * @access public - */ - function getServerKeyPublicModulus($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 optional Boolean $raw_output - * @return String - * @access public - */ - function getHostKeyPublicExponent($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 optional Boolean $raw_output - * @return String - * @access public - */ - function getHostKeyPublicModulus($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 optional Boolean $raw_output - * @return Array - * @access public - */ - function getSupportedCiphers($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 optional Boolean $raw_output - * @return Array - * @access public - */ - function getSupportedAuthentications($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); - } -} -?> \ No newline at end of file diff --git a/phpsec/Net/SSH2.php b/phpsec/Net/SSH2.php deleted file mode 100644 index aa9f6dbe5..000000000 --- a/phpsec/Net/SSH2.php +++ /dev/null @@ -1,2302 +0,0 @@ - - * login('username', 'password')) { - * exit('Login Failed'); - * } - * - * echo $ssh->exec('pwd'); - * echo $ssh->exec('ls -la'); - * ?> - * - * - * - * setPassword('whatever'); - * $key->loadKey(file_get_contents('privatekey')); - * - * $ssh = new Net_SSH2('www.domain.tld'); - * if (!$ssh->login('username', $key)) { - * exit('Login Failed'); - * } - * - * echo $ssh->exec('pwd'); - * echo $ssh->exec('ls -la'); - * ?> - * - * - * LICENSE: This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; either - * version 2.1 of the License, or (at your option) any later version. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with this library; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, - * MA 02111-1307 USA - * - * @category Net - * @package Net_SSH2 - * @author Jim Wigginton - * @copyright MMVII Jim Wigginton - * @license http://www.gnu.org/licenses/lgpl.txt - * @version $Id: SSH2.php,v 1.46 2010/04/27 21:29:36 terrafrost Exp $ - * @link http://phpseclib.sourceforge.net - */ - -/** - * Include Math_BigInteger - * - * Used to do Diffie-Hellman key exchange and DSA/RSA signature verification. - */ -require_once('Math/BigInteger.php'); - -/** - * Include Crypt_Random - */ -require_once('Crypt/Random.php'); - -/** - * Include Crypt_Hash - */ -require_once('Crypt/Hash.php'); - -/** - * Include Crypt_TripleDES - */ -require_once('Crypt/TripleDES.php'); - -/** - * Include Crypt_RC4 - */ -require_once('Crypt/RC4.php'); - -/** - * Include Crypt_AES - */ -require_once('Crypt/AES.php'); - -/**#@+ - * Execution Bitmap Masks - * - * @see Net_SSH2::bitmap - * @access private - */ -define('NET_SSH2_MASK_CONSTRUCTOR', 0x00000001); -define('NET_SSH2_MASK_LOGIN', 0x00000002); -/**#@-*/ - -/**#@+ - * Channel constants - * - * RFC4254 refers not to client and server channels but rather to sender and recipient channels. we don't refer - * to them in that way because RFC4254 toggles the meaning. the client sends a SSH_MSG_CHANNEL_OPEN message with - * a sender channel and the server sends a SSH_MSG_CHANNEL_OPEN_CONFIRMATION in response, with a sender and a - * recepient channel. at first glance, you might conclude that SSH_MSG_CHANNEL_OPEN_CONFIRMATION's sender channel - * would be the same thing as SSH_MSG_CHANNEL_OPEN's sender channel, but it's not, per this snipet: - * The 'recipient channel' is the channel number given in the original - * open request, and 'sender channel' is the channel number allocated by - * the other side. - * - * @see Net_SSH2::_send_channel_packet() - * @see Net_SSH2::_get_channel_packet() - * @access private - */ -define('NET_SSH2_CHANNEL_EXEC', 0); // PuTTy uses 0x100 -/**#@-*/ - -/**#@+ - * @access public - * @see Net_SSH2::getLog() - */ -/** - * Returns the message numbers - */ -define('NET_SSH2_LOG_SIMPLE', 1); -/** - * Returns the message content - */ -define('NET_SSH2_LOG_COMPLEX', 2); -/**#@-*/ - -/** - * Pure-PHP implementation of SSHv2. - * - * @author Jim Wigginton - * @version 0.1.0 - * @access public - * @package Net_SSH2 - */ -class Net_SSH2 { - /** - * The SSH identifier - * - * @var String - * @access private - */ - var $identifier = 'SSH-2.0-phpseclib_0.2'; - - /** - * The Socket Object - * - * @var Object - * @access private - */ - var $fsock; - - /** - * Execution Bitmap - * - * The bits that are set reprsent functions that have been called already. This is used to determine - * if a requisite function has been successfully executed. If not, an error should be thrown. - * - * @var Integer - * @access private - */ - var $bitmap = 0; - - /** - * Error information - * - * @see Net_SSH2::getErrors() - * @see Net_SSH2::getLastError() - * @var String - * @access private - */ - var $errors = array(); - - /** - * Server Identifier - * - * @see Net_SSH2::getServerIdentification() - * @var String - * @access private - */ - var $server_identifier = ''; - - /** - * Key Exchange Algorithms - * - * @see Net_SSH2::getKexAlgorithims() - * @var Array - * @access private - */ - var $kex_algorithms; - - /** - * Server Host Key Algorithms - * - * @see Net_SSH2::getServerHostKeyAlgorithms() - * @var Array - * @access private - */ - var $server_host_key_algorithms; - - /** - * Encryption Algorithms: Client to Server - * - * @see Net_SSH2::getEncryptionAlgorithmsClient2Server() - * @var Array - * @access private - */ - var $encryption_algorithms_client_to_server; - - /** - * Encryption Algorithms: Server to Client - * - * @see Net_SSH2::getEncryptionAlgorithmsServer2Client() - * @var Array - * @access private - */ - var $encryption_algorithms_server_to_client; - - /** - * MAC Algorithms: Client to Server - * - * @see Net_SSH2::getMACAlgorithmsClient2Server() - * @var Array - * @access private - */ - var $mac_algorithms_client_to_server; - - /** - * MAC Algorithms: Server to Client - * - * @see Net_SSH2::getMACAlgorithmsServer2Client() - * @var Array - * @access private - */ - var $mac_algorithms_server_to_client; - - /** - * Compression Algorithms: Client to Server - * - * @see Net_SSH2::getCompressionAlgorithmsClient2Server() - * @var Array - * @access private - */ - var $compression_algorithms_client_to_server; - - /** - * Compression Algorithms: Server to Client - * - * @see Net_SSH2::getCompressionAlgorithmsServer2Client() - * @var Array - * @access private - */ - var $compression_algorithms_server_to_client; - - /** - * Languages: Server to Client - * - * @see Net_SSH2::getLanguagesServer2Client() - * @var Array - * @access private - */ - var $languages_server_to_client; - - /** - * Languages: Client to Server - * - * @see Net_SSH2::getLanguagesClient2Server() - * @var Array - * @access private - */ - var $languages_client_to_server; - - /** - * Block Size for Server to Client Encryption - * - * "Note that the length of the concatenation of 'packet_length', - * 'padding_length', 'payload', and 'random padding' MUST be a multiple - * of the cipher block size or 8, whichever is larger. This constraint - * MUST be enforced, even when using stream ciphers." - * - * -- http://tools.ietf.org/html/rfc4253#section-6 - * - * @see Net_SSH2::Net_SSH2() - * @see Net_SSH2::_send_binary_packet() - * @var Integer - * @access private - */ - var $encrypt_block_size = 8; - - /** - * Block Size for Client to Server Encryption - * - * @see Net_SSH2::Net_SSH2() - * @see Net_SSH2::_get_binary_packet() - * @var Integer - * @access private - */ - var $decrypt_block_size = 8; - - /** - * Server to Client Encryption Object - * - * @see Net_SSH2::_get_binary_packet() - * @var Object - * @access private - */ - var $decrypt = false; - - /** - * Client to Server Encryption Object - * - * @see Net_SSH2::_send_binary_packet() - * @var Object - * @access private - */ - var $encrypt = false; - - /** - * Client to Server HMAC Object - * - * @see Net_SSH2::_send_binary_packet() - * @var Object - * @access private - */ - var $hmac_create = false; - - /** - * Server to Client HMAC Object - * - * @see Net_SSH2::_get_binary_packet() - * @var Object - * @access private - */ - var $hmac_check = false; - - /** - * Size of server to client HMAC - * - * We need to know how big the HMAC will be for the server to client direction so that we know how many bytes to read. - * For the client to server side, the HMAC object will make the HMAC as long as it needs to be. All we need to do is - * append it. - * - * @see Net_SSH2::_get_binary_packet() - * @var Integer - * @access private - */ - var $hmac_size = false; - - /** - * Server Public Host Key - * - * @see Net_SSH2::getServerPublicHostKey() - * @var String - * @access private - */ - var $server_public_host_key; - - /** - * Session identifer - * - * "The exchange hash H from the first key exchange is additionally - * used as the session identifier, which is a unique identifier for - * this connection." - * - * -- http://tools.ietf.org/html/rfc4253#section-7.2 - * - * @see Net_SSH2::_key_exchange() - * @var String - * @access private - */ - var $session_id = false; - - /** - * Message Numbers - * - * @see Net_SSH2::Net_SSH2() - * @var Array - * @access private - */ - var $message_numbers = array(); - - /** - * Disconnection Message 'reason codes' defined in RFC4253 - * - * @see Net_SSH2::Net_SSH2() - * @var Array - * @access private - */ - var $disconnect_reasons = array(); - - /** - * SSH_MSG_CHANNEL_OPEN_FAILURE 'reason codes', defined in RFC4254 - * - * @see Net_SSH2::Net_SSH2() - * @var Array - * @access private - */ - var $channel_open_failure_reasons = array(); - - /** - * Terminal Modes - * - * @link http://tools.ietf.org/html/rfc4254#section-8 - * @see Net_SSH2::Net_SSH2() - * @var Array - * @access private - */ - var $terminal_modes = array(); - - /** - * SSH_MSG_CHANNEL_EXTENDED_DATA's data_type_codes - * - * @link http://tools.ietf.org/html/rfc4254#section-5.2 - * @see Net_SSH2::Net_SSH2() - * @var Array - * @access private - */ - var $channel_extended_data_type_codes = array(); - - /** - * Send Sequence Number - * - * See 'Section 6.4. Data Integrity' of rfc4253 for more info. - * - * @see Net_SSH2::_send_binary_packet() - * @var Integer - * @access private - */ - var $send_seq_no = 0; - - /** - * Get Sequence Number - * - * See 'Section 6.4. Data Integrity' of rfc4253 for more info. - * - * @see Net_SSH2::_get_binary_packet() - * @var Integer - * @access private - */ - var $get_seq_no = 0; - - /** - * Server Channels - * - * Maps client channels to server channels - * - * @see Net_SSH2::_get_channel_packet() - * @see Net_SSH2::exec() - * @var Array - * @access private - */ - var $server_channels = array(); - - /** - * Channel Buffers - * - * If a client requests a packet from one channel but receives two packets from another those packets should - * be placed in a buffer - * - * @see Net_SSH2::_get_channel_packet() - * @see Net_SSH2::exec() - * @var Array - * @access private - */ - var $channel_buffers = array(); - - /** - * Channel Status - * - * Contains the type of the last sent message - * - * @see Net_SSH2::_get_channel_packet() - * @var Array - * @access private - */ - var $channel_status = array(); - - /** - * Packet Size - * - * Maximum packet size indexed by channel - * - * @see Net_SSH2::_send_channel_packet() - * @var Array - * @access private - */ - var $packet_size_client_to_server = array(); - - /** - * Message Number Log - * - * @see Net_SSH2::getLog() - * @var Array - * @access private - */ - var $message_number_log = array(); - - /** - * Message Log - * - * @see Net_SSH2::getLog() - * @var Array - * @access private - */ - var $message_log = array(); - - /** - * The Window Size - * - * Bytes the other party can send before it must wait for the window to be adjusted (0x7FFFFFFF = 4GB) - * - * @var Integer - * @see Net_SSH2::_send_channel_packet() - * @see Net_SSH2::exec() - * @access private - */ - var $window_size = 0x7FFFFFFF; - - /** - * Window size - * - * Window size indexed by channel - * - * @see Net_SSH2::_send_channel_packet() - * @var Array - * @access private - */ - var $window_size_client_to_server = array(); - - /** - * Server signature - * - * Verified against $this->session_id - * - * @see Net_SSH2::getServerPublicHostKey() - * @var String - * @access private - */ - var $signature = ''; - - /** - * Server signature format - * - * ssh-rsa or ssh-dss. - * - * @see Net_SSH2::getServerPublicHostKey() - * @var String - * @access private - */ - var $signature_format = ''; - - /** - * Default Constructor. - * - * Connects to an SSHv2 server - * - * @param String $host - * @param optional Integer $port - * @param optional Integer $timeout - * @return Net_SSH2 - * @access public - */ - function Net_SSH2($host, $port = 22, $timeout = 10) - { - $this->message_numbers = array( - 1 => 'NET_SSH2_MSG_DISCONNECT', - 2 => 'NET_SSH2_MSG_IGNORE', - 3 => 'NET_SSH2_MSG_UNIMPLEMENTED', - 4 => 'NET_SSH2_MSG_DEBUG', - 5 => 'NET_SSH2_MSG_SERVICE_REQUEST', - 6 => 'NET_SSH2_MSG_SERVICE_ACCEPT', - 20 => 'NET_SSH2_MSG_KEXINIT', - 21 => 'NET_SSH2_MSG_NEWKEYS', - 30 => 'NET_SSH2_MSG_KEXDH_INIT', - 31 => 'NET_SSH2_MSG_KEXDH_REPLY', - 50 => 'NET_SSH2_MSG_USERAUTH_REQUEST', - 51 => 'NET_SSH2_MSG_USERAUTH_FAILURE', - 52 => 'NET_SSH2_MSG_USERAUTH_SUCCESS', - 53 => 'NET_SSH2_MSG_USERAUTH_BANNER', - - 80 => 'NET_SSH2_MSG_GLOBAL_REQUEST', - 81 => 'NET_SSH2_MSG_REQUEST_SUCCESS', - 82 => 'NET_SSH2_MSG_REQUEST_FAILURE', - 90 => 'NET_SSH2_MSG_CHANNEL_OPEN', - 91 => 'NET_SSH2_MSG_CHANNEL_OPEN_CONFIRMATION', - 92 => 'NET_SSH2_MSG_CHANNEL_OPEN_FAILURE', - 93 => 'NET_SSH2_MSG_CHANNEL_WINDOW_ADJUST', - 94 => 'NET_SSH2_MSG_CHANNEL_DATA', - 95 => 'NET_SSH2_MSG_CHANNEL_EXTENDED_DATA', - 96 => 'NET_SSH2_MSG_CHANNEL_EOF', - 97 => 'NET_SSH2_MSG_CHANNEL_CLOSE', - 98 => 'NET_SSH2_MSG_CHANNEL_REQUEST', - 99 => 'NET_SSH2_MSG_CHANNEL_SUCCESS', - 100 => 'NET_SSH2_MSG_CHANNEL_FAILURE' - ); - $this->disconnect_reasons = array( - 1 => 'NET_SSH2_DISCONNECT_HOST_NOT_ALLOWED_TO_CONNECT', - 2 => 'NET_SSH2_DISCONNECT_PROTOCOL_ERROR', - 3 => 'NET_SSH2_DISCONNECT_KEY_EXCHANGE_FAILED', - 4 => 'NET_SSH2_DISCONNECT_RESERVED', - 5 => 'NET_SSH2_DISCONNECT_MAC_ERROR', - 6 => 'NET_SSH2_DISCONNECT_COMPRESSION_ERROR', - 7 => 'NET_SSH2_DISCONNECT_SERVICE_NOT_AVAILABLE', - 8 => 'NET_SSH2_DISCONNECT_PROTOCOL_VERSION_NOT_SUPPORTED', - 9 => 'NET_SSH2_DISCONNECT_HOST_KEY_NOT_VERIFIABLE', - 10 => 'NET_SSH2_DISCONNECT_CONNECTION_LOST', - 11 => 'NET_SSH2_DISCONNECT_BY_APPLICATION', - 12 => 'NET_SSH2_DISCONNECT_TOO_MANY_CONNECTIONS', - 13 => 'NET_SSH2_DISCONNECT_AUTH_CANCELLED_BY_USER', - 14 => 'NET_SSH2_DISCONNECT_NO_MORE_AUTH_METHODS_AVAILABLE', - 15 => 'NET_SSH2_DISCONNECT_ILLEGAL_USER_NAME' - ); - $this->channel_open_failure_reasons = array( - 1 => 'NET_SSH2_OPEN_ADMINISTRATIVELY_PROHIBITED' - ); - $this->terminal_modes = array( - 0 => 'NET_SSH2_TTY_OP_END' - ); - $this->channel_extended_data_type_codes = array( - 1 => 'NET_SSH2_EXTENDED_DATA_STDERR' - ); - - $this->_define_array( - $this->message_numbers, - $this->disconnect_reasons, - $this->channel_open_failure_reasons, - $this->terminal_modes, - $this->channel_extended_data_type_codes, - array(60 => 'NET_SSH2_MSG_USERAUTH_PASSWD_CHANGEREQ'), - array(60 => 'NET_SSH2_MSG_USERAUTH_PK_OK') - ); - - $this->fsock = @fsockopen($host, $port, $errno, $errstr, $timeout); - if (!$this->fsock) { - user_error(rtrim("Cannot connect to $host. Error $errno. $errstr"), E_USER_NOTICE); - return; - } - - /* According to the SSH2 specs, - - "The server MAY send other lines of data before sending the version - string. Each line SHOULD be terminated by a Carriage Return and Line - Feed. Such lines MUST NOT begin with "SSH-", and SHOULD be encoded - in ISO-10646 UTF-8 [RFC3629] (language is not specified). Clients - MUST be able to process such lines." */ - $temp = ''; - $extra = ''; - while (!feof($this->fsock) && !preg_match('#^SSH-(\d\.\d+)#', $temp, $matches)) { - if (substr($temp, -2) == "\r\n") { - $extra.= $temp; - $temp = ''; - } - $temp.= fgets($this->fsock, 255); - } - - $ext = array(); - if (extension_loaded('mcrypt')) { - $ext[] = 'mcrypt'; - } - if (extension_loaded('gmp')) { - $ext[] = 'gmp'; - } else if (extension_loaded('bcmath')) { - $ext[] = 'bcmath'; - } - - if (!empty($ext)) { - $this->identifier.= ' (' . implode(', ', $ext) . ')'; - } - - if (defined('NET_SSH2_LOGGING')) { - $this->message_number_log[] = '<-'; - $this->message_number_log[] = '->'; - - if (NET_SSH2_LOGGING == NET_SSH2_LOG_COMPLEX) { - $this->message_log[] = $temp; - $this->message_log[] = $this->identifier . "\r\n"; - } - } - - $this->server_identifier = trim($temp, "\r\n"); - if (!empty($extra)) { - $this->errors[] = utf8_decode($extra); - } - - if ($matches[1] != '1.99' && $matches[1] != '2.0') { - user_error("Cannot connect to SSH $matches[1] servers", E_USER_NOTICE); - return; - } - - fputs($this->fsock, $this->identifier . "\r\n"); - - $response = $this->_get_binary_packet(); - if ($response === false) { - user_error('Connection closed by server', E_USER_NOTICE); - return; - } - - if (ord($response[0]) != NET_SSH2_MSG_KEXINIT) { - user_error('Expected SSH_MSG_KEXINIT', E_USER_NOTICE); - return; - } - - if (!$this->_key_exchange($response)) { - return; - } - - $this->bitmap = NET_SSH2_MASK_CONSTRUCTOR; - } - - /** - * Key Exchange - * - * @param String $kexinit_payload_server - * @access private - */ - function _key_exchange($kexinit_payload_server) - { - static $kex_algorithms = array( - 'diffie-hellman-group1-sha1', // REQUIRED - 'diffie-hellman-group14-sha1' // REQUIRED - ); - - static $server_host_key_algorithms = array( - 'ssh-rsa', // RECOMMENDED sign Raw RSA Key - 'ssh-dss' // REQUIRED sign Raw DSS Key - ); - - static $encryption_algorithms = array( - // from : - 'arcfour256', - 'arcfour128', - - 'arcfour', // OPTIONAL the ARCFOUR stream cipher with a 128-bit key - - 'aes128-cbc', // RECOMMENDED AES with a 128-bit key - 'aes192-cbc', // OPTIONAL AES with a 192-bit key - 'aes256-cbc', // OPTIONAL AES in CBC mode, with a 256-bit key - - // from : - 'aes128-ctr', // RECOMMENDED AES (Rijndael) in SDCTR mode, with 128-bit key - 'aes192-ctr', // RECOMMENDED AES with 192-bit key - 'aes256-ctr', // RECOMMENDED AES with 256-bit key - '3des-ctr', // RECOMMENDED Three-key 3DES in SDCTR mode - - '3des-cbc', // REQUIRED three-key 3DES in CBC mode - 'none' // OPTIONAL no encryption; NOT RECOMMENDED - ); - - static $mac_algorithms = array( - 'hmac-sha1-96', // RECOMMENDED first 96 bits of HMAC-SHA1 (digest length = 12, key length = 20) - 'hmac-sha1', // REQUIRED HMAC-SHA1 (digest length = key length = 20) - 'hmac-md5-96', // OPTIONAL first 96 bits of HMAC-MD5 (digest length = 12, key length = 16) - 'hmac-md5', // OPTIONAL HMAC-MD5 (digest length = key length = 16) - 'none' // OPTIONAL no MAC; NOT RECOMMENDED - ); - - static $compression_algorithms = array( - 'none' // REQUIRED no compression - //'zlib' // OPTIONAL ZLIB (LZ77) compression - ); - - static $str_kex_algorithms, $str_server_host_key_algorithms, - $encryption_algorithms_server_to_client, $mac_algorithms_server_to_client, $compression_algorithms_server_to_client, - $encryption_algorithms_client_to_server, $mac_algorithms_client_to_server, $compression_algorithms_client_to_server; - - if (empty($str_kex_algorithms)) { - $str_kex_algorithms = implode(',', $kex_algorithms); - $str_server_host_key_algorithms = implode(',', $server_host_key_algorithms); - $encryption_algorithms_server_to_client = $encryption_algorithms_client_to_server = implode(',', $encryption_algorithms); - $mac_algorithms_server_to_client = $mac_algorithms_client_to_server = implode(',', $mac_algorithms); - $compression_algorithms_server_to_client = $compression_algorithms_client_to_server = implode(',', $compression_algorithms); - } - - $client_cookie = ''; - for ($i = 0; $i < 16; $i++) { - $client_cookie.= chr(crypt_random(0, 255)); - } - - $response = $kexinit_payload_server; - $this->_string_shift($response, 1); // skip past the message number (it should be SSH_MSG_KEXINIT) - $server_cookie = $this->_string_shift($response, 16); - - $temp = unpack('Nlength', $this->_string_shift($response, 4)); - $this->kex_algorithms = explode(',', $this->_string_shift($response, $temp['length'])); - - $temp = unpack('Nlength', $this->_string_shift($response, 4)); - $this->server_host_key_algorithms = explode(',', $this->_string_shift($response, $temp['length'])); - - $temp = unpack('Nlength', $this->_string_shift($response, 4)); - $this->encryption_algorithms_client_to_server = explode(',', $this->_string_shift($response, $temp['length'])); - - $temp = unpack('Nlength', $this->_string_shift($response, 4)); - $this->encryption_algorithms_server_to_client = explode(',', $this->_string_shift($response, $temp['length'])); - - $temp = unpack('Nlength', $this->_string_shift($response, 4)); - $this->mac_algorithms_client_to_server = explode(',', $this->_string_shift($response, $temp['length'])); - - $temp = unpack('Nlength', $this->_string_shift($response, 4)); - $this->mac_algorithms_server_to_client = explode(',', $this->_string_shift($response, $temp['length'])); - - $temp = unpack('Nlength', $this->_string_shift($response, 4)); - $this->compression_algorithms_client_to_server = explode(',', $this->_string_shift($response, $temp['length'])); - - $temp = unpack('Nlength', $this->_string_shift($response, 4)); - $this->compression_algorithms_server_to_client = explode(',', $this->_string_shift($response, $temp['length'])); - - $temp = unpack('Nlength', $this->_string_shift($response, 4)); - $this->languages_client_to_server = explode(',', $this->_string_shift($response, $temp['length'])); - - $temp = unpack('Nlength', $this->_string_shift($response, 4)); - $this->languages_server_to_client = explode(',', $this->_string_shift($response, $temp['length'])); - - extract(unpack('Cfirst_kex_packet_follows', $this->_string_shift($response, 1))); - $first_kex_packet_follows = $first_kex_packet_follows != 0; - - // the sending of SSH2_MSG_KEXINIT could go in one of two places. this is the second place. - $kexinit_payload_client = pack('Ca*Na*Na*Na*Na*Na*Na*Na*Na*Na*Na*CN', - NET_SSH2_MSG_KEXINIT, $client_cookie, strlen($str_kex_algorithms), $str_kex_algorithms, - strlen($str_server_host_key_algorithms), $str_server_host_key_algorithms, strlen($encryption_algorithms_client_to_server), - $encryption_algorithms_client_to_server, strlen($encryption_algorithms_server_to_client), $encryption_algorithms_server_to_client, - strlen($mac_algorithms_client_to_server), $mac_algorithms_client_to_server, strlen($mac_algorithms_server_to_client), - $mac_algorithms_server_to_client, strlen($compression_algorithms_client_to_server), $compression_algorithms_client_to_server, - strlen($compression_algorithms_server_to_client), $compression_algorithms_server_to_client, 0, '', 0, '', - 0, 0 - ); - - if (!$this->_send_binary_packet($kexinit_payload_client)) { - return false; - } - // here ends the second place. - - // we need to decide upon the symmetric encryption algorithms before we do the diffie-hellman key exchange - for ($i = 0; $i < count($encryption_algorithms) && !in_array($encryption_algorithms[$i], $this->encryption_algorithms_server_to_client); $i++); - if ($i == count($encryption_algorithms)) { - user_error('No compatible server to client encryption algorithms found', E_USER_NOTICE); - return $this->_disconnect(NET_SSH2_DISCONNECT_KEY_EXCHANGE_FAILED); - } - - // we don't initialize any crypto-objects, yet - we do that, later. for now, we need the lengths to make the - // diffie-hellman key exchange as fast as possible - $decrypt = $encryption_algorithms[$i]; - switch ($decrypt) { - case '3des-cbc': - case '3des-ctr': - $decryptKeyLength = 24; // eg. 192 / 8 - break; - case 'aes256-cbc': - case 'aes256-ctr': - $decryptKeyLength = 32; // eg. 256 / 8 - break; - case 'aes192-cbc': - case 'aes192-ctr': - $decryptKeyLength = 24; // eg. 192 / 8 - break; - case 'aes128-cbc': - case 'aes128-ctr': - $decryptKeyLength = 16; // eg. 128 / 8 - break; - case 'arcfour': - case 'arcfour128': - $decryptKeyLength = 16; // eg. 128 / 8 - break; - case 'arcfour256': - $decryptKeyLength = 32; // eg. 128 / 8 - break; - case 'none'; - $decryptKeyLength = 0; - } - - for ($i = 0; $i < count($encryption_algorithms) && !in_array($encryption_algorithms[$i], $this->encryption_algorithms_client_to_server); $i++); - if ($i == count($encryption_algorithms)) { - user_error('No compatible client to server encryption algorithms found', E_USER_NOTICE); - return $this->_disconnect(NET_SSH2_DISCONNECT_KEY_EXCHANGE_FAILED); - } - - $encrypt = $encryption_algorithms[$i]; - switch ($encrypt) { - case '3des-cbc': - case '3des-ctr': - $encryptKeyLength = 24; - break; - case 'aes256-cbc': - case 'aes256-ctr': - $encryptKeyLength = 32; - break; - case 'aes192-cbc': - case 'aes192-ctr': - $encryptKeyLength = 24; - break; - case 'aes128-cbc': - case 'aes128-ctr': - $encryptKeyLength = 16; - break; - case 'arcfour': - case 'arcfour128': - $encryptKeyLength = 16; - break; - case 'arcfour256': - $encryptKeyLength = 32; - break; - case 'none'; - $encryptKeyLength = 0; - } - - $keyLength = $decryptKeyLength > $encryptKeyLength ? $decryptKeyLength : $encryptKeyLength; - - // through diffie-hellman key exchange a symmetric key is obtained - for ($i = 0; $i < count($kex_algorithms) && !in_array($kex_algorithms[$i], $this->kex_algorithms); $i++); - if ($i == count($kex_algorithms)) { - user_error('No compatible key exchange algorithms found', E_USER_NOTICE); - return $this->_disconnect(NET_SSH2_DISCONNECT_KEY_EXCHANGE_FAILED); - } - - switch ($kex_algorithms[$i]) { - // see http://tools.ietf.org/html/rfc2409#section-6.2 and - // http://tools.ietf.org/html/rfc2412, appendex E - case 'diffie-hellman-group1-sha1': - $p = pack('H256', 'FFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD129024E088A67CC74' . - '020BBEA63B139B22514A08798E3404DDEF9519B3CD3A431B302B0A6DF25F1437' . - '4FE1356D6D51C245E485B576625E7EC6F44C42E9A637ED6B0BFF5CB6F406B7ED' . - 'EE386BFB5A899FA5AE9F24117C4B1FE649286651ECE65381FFFFFFFFFFFFFFFF'); - $keyLength = $keyLength < 160 ? $keyLength : 160; - $hash = 'sha1'; - break; - // see http://tools.ietf.org/html/rfc3526#section-3 - case 'diffie-hellman-group14-sha1': - $p = pack('H512', 'FFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD129024E088A67CC74' . - '020BBEA63B139B22514A08798E3404DDEF9519B3CD3A431B302B0A6DF25F1437' . - '4FE1356D6D51C245E485B576625E7EC6F44C42E9A637ED6B0BFF5CB6F406B7ED' . - 'EE386BFB5A899FA5AE9F24117C4B1FE649286651ECE45B3DC2007CB8A163BF05' . - '98DA48361C55D39A69163FA8FD24CF5F83655D23DCA3AD961C62F356208552BB' . - '9ED529077096966D670C354E4ABC9804F1746C08CA18217C32905E462E36CE3B' . - 'E39E772C180E86039B2783A2EC07A28FB5C55DF06F4C52C9DE2BCBF695581718' . - '3995497CEA956AE515D2261898FA051015728E5A8AACAA68FFFFFFFFFFFFFFFF'); - $keyLength = $keyLength < 160 ? $keyLength : 160; - $hash = 'sha1'; - } - - $p = new Math_BigInteger($p, 256); - //$q = $p->bitwise_rightShift(1); - - /* To increase the speed of the key exchange, both client and server may - reduce the size of their private exponents. It should be at least - twice as long as the key material that is generated from the shared - secret. For more details, see the paper by van Oorschot and Wiener - [VAN-OORSCHOT]. - - -- http://tools.ietf.org/html/rfc4419#section-6.2 */ - $q = new Math_BigInteger(1); - $q = $q->bitwise_leftShift(2 * $keyLength); - $q = $q->subtract(new Math_BigInteger(1)); - - $g = new Math_BigInteger(2); - $x = new Math_BigInteger(); - $x->setRandomGenerator('crypt_random'); - $x = $x->random(new Math_BigInteger(1), $q); - $e = $g->modPow($x, $p); - - $eBytes = $e->toBytes(true); - $data = pack('CNa*', NET_SSH2_MSG_KEXDH_INIT, strlen($eBytes), $eBytes); - - if (!$this->_send_binary_packet($data)) { - user_error('Connection closed by server', E_USER_NOTICE); - return false; - } - - $response = $this->_get_binary_packet(); - if ($response === false) { - user_error('Connection closed by server', E_USER_NOTICE); - return false; - } - extract(unpack('Ctype', $this->_string_shift($response, 1))); - - if ($type != NET_SSH2_MSG_KEXDH_REPLY) { - user_error('Expected SSH_MSG_KEXDH_REPLY', E_USER_NOTICE); - return false; - } - - $temp = unpack('Nlength', $this->_string_shift($response, 4)); - $this->server_public_host_key = $server_public_host_key = $this->_string_shift($response, $temp['length']); - - $temp = unpack('Nlength', $this->_string_shift($server_public_host_key, 4)); - $public_key_format = $this->_string_shift($server_public_host_key, $temp['length']); - - $temp = unpack('Nlength', $this->_string_shift($response, 4)); - $fBytes = $this->_string_shift($response, $temp['length']); - $f = new Math_BigInteger($fBytes, -256); - - $temp = unpack('Nlength', $this->_string_shift($response, 4)); - $this->signature = $this->_string_shift($response, $temp['length']); - - $temp = unpack('Nlength', $this->_string_shift($this->signature, 4)); - $this->signature_format = $this->_string_shift($this->signature, $temp['length']); - - $key = $f->modPow($x, $p); - $keyBytes = $key->toBytes(true); - - if ($this->session_id === false) { - $source = pack('Na*Na*Na*Na*Na*Na*Na*Na*', - strlen($this->identifier), $this->identifier, strlen($this->server_identifier), $this->server_identifier, - strlen($kexinit_payload_client), $kexinit_payload_client, strlen($kexinit_payload_server), - $kexinit_payload_server, strlen($this->server_public_host_key), $this->server_public_host_key, strlen($eBytes), - $eBytes, strlen($fBytes), $fBytes, strlen($keyBytes), $keyBytes - ); - - $source = pack('H*', $hash($source)); - - $this->session_id = $source; - } - - for ($i = 0; $i < count($server_host_key_algorithms) && !in_array($server_host_key_algorithms[$i], $this->server_host_key_algorithms); $i++); - if ($i == count($server_host_key_algorithms)) { - user_error('No compatible server host key algorithms found', E_USER_NOTICE); - return $this->_disconnect(NET_SSH2_DISCONNECT_KEY_EXCHANGE_FAILED); - } - - if ($public_key_format != $server_host_key_algorithms[$i] || $this->signature_format != $server_host_key_algorithms[$i]) { - user_error('Sever Host Key Algorithm Mismatch', E_USER_NOTICE); - return $this->_disconnect(NET_SSH2_DISCONNECT_KEY_EXCHANGE_FAILED); - } - - $packet = pack('C', - NET_SSH2_MSG_NEWKEYS - ); - - if (!$this->_send_binary_packet($packet)) { - return false; - } - - $response = $this->_get_binary_packet(); - - if ($response === false) { - user_error('Connection closed by server', E_USER_NOTICE); - return false; - } - - extract(unpack('Ctype', $this->_string_shift($response, 1))); - - if ($type != NET_SSH2_MSG_NEWKEYS) { - user_error('Expected SSH_MSG_NEWKEYS', E_USER_NOTICE); - return false; - } - - switch ($encrypt) { - case '3des-cbc': - $this->encrypt = new Crypt_TripleDES(); - // $this->encrypt_block_size = 64 / 8 == the default - break; - case '3des-ctr': - $this->encrypt = new Crypt_TripleDES(CRYPT_DES_MODE_CTR); - // $this->encrypt_block_size = 64 / 8 == the default - break; - case 'aes256-cbc': - case 'aes192-cbc': - case 'aes128-cbc': - $this->encrypt = new Crypt_AES(); - $this->encrypt_block_size = 16; // eg. 128 / 8 - break; - case 'aes256-ctr': - case 'aes192-ctr': - case 'aes128-ctr': - $this->encrypt = new Crypt_AES(CRYPT_AES_MODE_CTR); - $this->encrypt_block_size = 16; // eg. 128 / 8 - break; - case 'arcfour': - case 'arcfour128': - case 'arcfour256': - $this->encrypt = new Crypt_RC4(); - break; - case 'none'; - //$this->encrypt = new Crypt_Null(); - } - - switch ($decrypt) { - case '3des-cbc': - $this->decrypt = new Crypt_TripleDES(); - break; - case '3des-ctr': - $this->decrypt = new Crypt_TripleDES(CRYPT_DES_MODE_CTR); - break; - case 'aes256-cbc': - case 'aes192-cbc': - case 'aes128-cbc': - $this->decrypt = new Crypt_AES(); - $this->decrypt_block_size = 16; - break; - case 'aes256-ctr': - case 'aes192-ctr': - case 'aes128-ctr': - $this->decrypt = new Crypt_AES(CRYPT_AES_MODE_CTR); - $this->decrypt_block_size = 16; - break; - case 'arcfour': - case 'arcfour128': - case 'arcfour256': - $this->decrypt = new Crypt_RC4(); - break; - case 'none'; - //$this->decrypt = new Crypt_Null(); - } - - $keyBytes = pack('Na*', strlen($keyBytes), $keyBytes); - - if ($this->encrypt) { - $this->encrypt->enableContinuousBuffer(); - $this->encrypt->disablePadding(); - - $iv = pack('H*', $hash($keyBytes . $this->session_id . 'A' . $this->session_id)); - while ($this->encrypt_block_size > strlen($iv)) { - $iv.= pack('H*', $hash($keyBytes . $this->session_id . $iv)); - } - $this->encrypt->setIV(substr($iv, 0, $this->encrypt_block_size)); - - $key = pack('H*', $hash($keyBytes . $this->session_id . 'C' . $this->session_id)); - while ($encryptKeyLength > strlen($key)) { - $key.= pack('H*', $hash($keyBytes . $this->session_id . $key)); - } - $this->encrypt->setKey(substr($key, 0, $encryptKeyLength)); - } - - if ($this->decrypt) { - $this->decrypt->enableContinuousBuffer(); - $this->decrypt->disablePadding(); - - $iv = pack('H*', $hash($keyBytes . $this->session_id . 'B' . $this->session_id)); - while ($this->decrypt_block_size > strlen($iv)) { - $iv.= pack('H*', $hash($keyBytes . $this->session_id . $iv)); - } - $this->decrypt->setIV(substr($iv, 0, $this->decrypt_block_size)); - - $key = pack('H*', $hash($keyBytes . $this->session_id . 'D' . $this->session_id)); - while ($decryptKeyLength > strlen($key)) { - $key.= pack('H*', $hash($keyBytes . $this->session_id . $key)); - } - $this->decrypt->setKey(substr($key, 0, $decryptKeyLength)); - } - - /* The "arcfour128" algorithm is the RC4 cipher, as described in - [SCHNEIER], using a 128-bit key. The first 1536 bytes of keystream - generated by the cipher MUST be discarded, and the first byte of the - first encrypted packet MUST be encrypted using the 1537th byte of - keystream. - - -- http://tools.ietf.org/html/rfc4345#section-4 */ - if ($encrypt == 'arcfour128' || $encrypt == 'arcfour256') { - $this->encrypt->encrypt(str_repeat("\0", 1536)); - } - if ($decrypt == 'arcfour128' || $decrypt == 'arcfour256') { - $this->decrypt->decrypt(str_repeat("\0", 1536)); - } - - for ($i = 0; $i < count($mac_algorithms) && !in_array($mac_algorithms[$i], $this->mac_algorithms_client_to_server); $i++); - if ($i == count($mac_algorithms)) { - user_error('No compatible client to server message authentication algorithms found', E_USER_NOTICE); - return $this->_disconnect(NET_SSH2_DISCONNECT_KEY_EXCHANGE_FAILED); - } - - $createKeyLength = 0; // ie. $mac_algorithms[$i] == 'none' - switch ($mac_algorithms[$i]) { - case 'hmac-sha1': - $this->hmac_create = new Crypt_Hash('sha1'); - $createKeyLength = 20; - break; - case 'hmac-sha1-96': - $this->hmac_create = new Crypt_Hash('sha1-96'); - $createKeyLength = 20; - break; - case 'hmac-md5': - $this->hmac_create = new Crypt_Hash('md5'); - $createKeyLength = 16; - break; - case 'hmac-md5-96': - $this->hmac_create = new Crypt_Hash('md5-96'); - $createKeyLength = 16; - } - - for ($i = 0; $i < count($mac_algorithms) && !in_array($mac_algorithms[$i], $this->mac_algorithms_server_to_client); $i++); - if ($i == count($mac_algorithms)) { - user_error('No compatible server to client message authentication algorithms found', E_USER_NOTICE); - return $this->_disconnect(NET_SSH2_DISCONNECT_KEY_EXCHANGE_FAILED); - } - - $checkKeyLength = 0; - $this->hmac_size = 0; - switch ($mac_algorithms[$i]) { - case 'hmac-sha1': - $this->hmac_check = new Crypt_Hash('sha1'); - $checkKeyLength = 20; - $this->hmac_size = 20; - break; - case 'hmac-sha1-96': - $this->hmac_check = new Crypt_Hash('sha1-96'); - $checkKeyLength = 20; - $this->hmac_size = 12; - break; - case 'hmac-md5': - $this->hmac_check = new Crypt_Hash('md5'); - $checkKeyLength = 16; - $this->hmac_size = 16; - break; - case 'hmac-md5-96': - $this->hmac_check = new Crypt_Hash('md5-96'); - $checkKeyLength = 16; - $this->hmac_size = 12; - } - - $key = pack('H*', $hash($keyBytes . $this->session_id . 'E' . $this->session_id)); - while ($createKeyLength > strlen($key)) { - $key.= pack('H*', $hash($keyBytes . $this->session_id . $key)); - } - $this->hmac_create->setKey(substr($key, 0, $createKeyLength)); - - $key = pack('H*', $hash($keyBytes . $this->session_id . 'F' . $this->session_id)); - while ($checkKeyLength > strlen($key)) { - $key.= pack('H*', $hash($keyBytes . $this->session_id . $key)); - } - $this->hmac_check->setKey(substr($key, 0, $checkKeyLength)); - - for ($i = 0; $i < count($compression_algorithms) && !in_array($compression_algorithms[$i], $this->compression_algorithms_server_to_client); $i++); - if ($i == count($compression_algorithms)) { - user_error('No compatible server to client compression algorithms found', E_USER_NOTICE); - return $this->_disconnect(NET_SSH2_DISCONNECT_KEY_EXCHANGE_FAILED); - } - $this->decompress = $compression_algorithms[$i] == 'zlib'; - - for ($i = 0; $i < count($compression_algorithms) && !in_array($compression_algorithms[$i], $this->compression_algorithms_client_to_server); $i++); - if ($i == count($compression_algorithms)) { - user_error('No compatible client to server compression algorithms found', E_USER_NOTICE); - return $this->_disconnect(NET_SSH2_DISCONNECT_KEY_EXCHANGE_FAILED); - } - $this->compress = $compression_algorithms[$i] == 'zlib'; - - return true; - } - - /** - * Login - * - * @param String $username - * @param optional String $password - * @return Boolean - * @access public - * @internal It might be worthwhile, at some point, to protect against {@link http://tools.ietf.org/html/rfc4251#section-9.3.9 traffic analysis} - * by sending dummy SSH_MSG_IGNORE messages. - */ - function login($username, $password = '') - { - if (!($this->bitmap & NET_SSH2_MASK_CONSTRUCTOR)) { - return false; - } - - $packet = pack('CNa*', - NET_SSH2_MSG_SERVICE_REQUEST, strlen('ssh-userauth'), 'ssh-userauth' - ); - - if (!$this->_send_binary_packet($packet)) { - return false; - } - - $response = $this->_get_binary_packet(); - if ($response === false) { - user_error('Connection closed by server', E_USER_NOTICE); - return false; - } - - extract(unpack('Ctype', $this->_string_shift($response, 1))); - - if ($type != NET_SSH2_MSG_SERVICE_ACCEPT) { - user_error('Expected SSH_MSG_SERVICE_ACCEPT', E_USER_NOTICE); - return false; - } - - // although PHP5's get_class() preserves the case, PHP4's does not - if (is_object($password) && strtolower(get_class($password)) == 'crypt_rsa') { - return $this->_privatekey_login($username, $password); - } - - $utf8_password = utf8_encode($password); - $packet = pack('CNa*Na*Na*CNa*', - NET_SSH2_MSG_USERAUTH_REQUEST, strlen($username), $username, strlen('ssh-connection'), 'ssh-connection', - strlen('password'), 'password', 0, strlen($utf8_password), $utf8_password - ); - - if (!$this->_send_binary_packet($packet)) { - return false; - } - - // remove the username and password from the last logged packet - if (defined('NET_SSH2_LOGGING') && NET_SSH2_LOGGING == NET_SSH2_LOG_COMPLEX) { - $packet = pack('CNa*Na*Na*CNa*', - NET_SSH2_MSG_USERAUTH_REQUEST, strlen('username'), 'username', strlen('ssh-connection'), 'ssh-connection', - strlen('password'), 'password', 0, strlen('password'), 'password' - ); - $this->message_log[count($this->message_log) - 1] = $packet; - } - - $response = $this->_get_binary_packet(); - if ($response === false) { - user_error('Connection closed by server', E_USER_NOTICE); - return false; - } - - extract(unpack('Ctype', $this->_string_shift($response, 1))); - - switch ($type) { - case NET_SSH2_MSG_USERAUTH_PASSWD_CHANGEREQ: // in theory, the password can be changed - if (defined('NET_SSH2_LOGGING')) { - $this->message_number_log[count($this->message_number_log) - 1] = 'NET_SSH2_MSG_USERAUTH_PASSWD_CHANGEREQ'; - } - extract(unpack('Nlength', $this->_string_shift($response, 4))); - $this->errors[] = 'SSH_MSG_USERAUTH_PASSWD_CHANGEREQ: ' . utf8_decode($this->_string_shift($response, $length)); - return $this->_disconnect(NET_SSH2_DISCONNECT_AUTH_CANCELLED_BY_USER); - case NET_SSH2_MSG_USERAUTH_FAILURE: - // either the login is bad or the server employees multi-factor authentication - return false; - case NET_SSH2_MSG_USERAUTH_SUCCESS: - $this->bitmap |= NET_SSH2_MASK_LOGIN; - return true; - } - - return false; - } - - /** - * Login with an RSA private key - * - * @param String $username - * @param Crypt_RSA $password - * @return Boolean - * @access private - * @internal It might be worthwhile, at some point, to protect against {@link http://tools.ietf.org/html/rfc4251#section-9.3.9 traffic analysis} - * by sending dummy SSH_MSG_IGNORE messages. - */ - function _privatekey_login($username, $privatekey) - { - // see http://tools.ietf.org/html/rfc4253#page-15 - $publickey = $privatekey->getPublicKey(CRYPT_RSA_PUBLIC_FORMAT_RAW); - if ($publickey === false) { - return false; - } - - $publickey = array( - 'e' => $publickey['e']->toBytes(true), - 'n' => $publickey['n']->toBytes(true) - ); - $publickey = pack('Na*Na*Na*', - strlen('ssh-rsa'), 'ssh-rsa', strlen($publickey['e']), $publickey['e'], strlen($publickey['n']), $publickey['n'] - ); - - $part1 = pack('CNa*Na*Na*', - NET_SSH2_MSG_USERAUTH_REQUEST, strlen($username), $username, strlen('ssh-connection'), 'ssh-connection', - strlen('publickey'), 'publickey' - ); - $part2 = pack('Na*Na*', strlen('ssh-rsa'), 'ssh-rsa', strlen($publickey), $publickey); - - $packet = $part1 . chr(0) . $part2; - - if (!$this->_send_binary_packet($packet)) { - return false; - } - - $response = $this->_get_binary_packet(); - if ($response === false) { - user_error('Connection closed by server', E_USER_NOTICE); - return false; - } - - extract(unpack('Ctype', $this->_string_shift($response, 1))); - - switch ($type) { - case NET_SSH2_MSG_USERAUTH_FAILURE: - extract(unpack('Nlength', $this->_string_shift($response, 4))); - $this->errors[] = 'SSH_MSG_USERAUTH_FAILURE: ' . $this->_string_shift($response, $length); - return $this->_disconnect(NET_SSH2_DISCONNECT_AUTH_CANCELLED_BY_USER); - case NET_SSH2_MSG_USERAUTH_PK_OK: - // we'll just take it on faith that the public key blob and the public key algorithm name are as - // they should be - if (defined('NET_SSH2_LOGGING')) { - $this->message_number_log[count($this->message_number_log) - 1] = 'NET_SSH2_MSG_USERAUTH_PK_OK'; - } - } - - $packet = $part1 . chr(1) . $part2; - $privatekey->setSignatureMode(CRYPT_RSA_SIGNATURE_PKCS1); - $signature = $privatekey->sign(pack('Na*a*', strlen($this->session_id), $this->session_id, $packet)); - $signature = pack('Na*Na*', strlen('ssh-rsa'), 'ssh-rsa', strlen($signature), $signature); - $packet.= pack('Na*', strlen($signature), $signature); - - if (!$this->_send_binary_packet($packet)) { - return false; - } - - $response = $this->_get_binary_packet(); - if ($response === false) { - user_error('Connection closed by server', E_USER_NOTICE); - return false; - } - - extract(unpack('Ctype', $this->_string_shift($response, 1))); - - switch ($type) { - case NET_SSH2_MSG_USERAUTH_FAILURE: - // either the login is bad or the server employees multi-factor authentication - return false; - case NET_SSH2_MSG_USERAUTH_SUCCESS: - $this->bitmap |= NET_SSH2_MASK_LOGIN; - return true; - } - - return false; - } - - /** - * Execute Command - * - * @param String $command - * @return String - * @access public - */ - function exec($command) - { - if (!($this->bitmap & NET_SSH2_MASK_LOGIN)) { - return false; - } - - // RFC4254 defines the (client) window size as "bytes the other party can send before it must wait for the window to - // be adjusted". 0x7FFFFFFF is, at 4GB, the max size. technically, it should probably be decremented, but, - // honestly, if you're transfering more than 4GB, you probably shouldn't be using phpseclib, anyway. - // see http://tools.ietf.org/html/rfc4254#section-5.2 for more info - $this->window_size_client_to_server[NET_SSH2_CHANNEL_EXEC] = 0x7FFFFFFF; - // 0x8000 is the maximum max packet size, per http://tools.ietf.org/html/rfc4253#section-6.1, although since PuTTy - // uses 0x4000, that's what will be used here, as well. - $packet_size = 0x4000; - - $packet = pack('CNa*N3', - NET_SSH2_MSG_CHANNEL_OPEN, strlen('session'), 'session', NET_SSH2_CHANNEL_EXEC, $this->window_size_client_to_server[NET_SSH2_CHANNEL_EXEC], $packet_size); - - if (!$this->_send_binary_packet($packet)) { - return false; - } - - $this->channel_status[NET_SSH2_CHANNEL_EXEC] = NET_SSH2_MSG_CHANNEL_OPEN; - - $response = $this->_get_channel_packet(NET_SSH2_CHANNEL_EXEC); - if ($response === false) { - return false; - } - - // sending a pty-req SSH_MSG_CHANNEL_REQUEST message is unnecessary and, in fact, in most cases, slows things - // down. the one place where it might be desirable is if you're doing something like Net_SSH2::exec('ping localhost &'). - // with a pty-req SSH_MSG_cHANNEL_REQUEST, exec() will return immediately and the ping process will then - // then immediately terminate. without such a request exec() will loop indefinitely. the ping process won't end but - // neither will your script. - - // although, in theory, the size of SSH_MSG_CHANNEL_REQUEST could exceed the maximum packet size established by - // SSH_MSG_CHANNEL_OPEN_CONFIRMATION, RFC4254#section-5.1 states that the "maximum packet size" refers to the - // "maximum size of an individual data packet". ie. SSH_MSG_CHANNEL_DATA. RFC4254#section-5.2 corroborates. - $packet = pack('CNNa*CNa*', - NET_SSH2_MSG_CHANNEL_REQUEST, $this->server_channels[NET_SSH2_CHANNEL_EXEC], strlen('exec'), 'exec', 1, strlen($command), $command); - if (!$this->_send_binary_packet($packet)) { - return false; - } - - $this->channel_status[NET_SSH2_CHANNEL_EXEC] = NET_SSH2_MSG_CHANNEL_REQUEST; - - $response = $this->_get_channel_packet(NET_SSH2_CHANNEL_EXEC); - if ($response === false) { - return false; - } - - $this->channel_status[NET_SSH2_CHANNEL_EXEC] = NET_SSH2_MSG_CHANNEL_DATA; - - $output = ''; - while (true) { - $temp = $this->_get_channel_packet(NET_SSH2_CHANNEL_EXEC); - switch (true) { - case $temp === true: - return $output; - case $temp === false: - return false; - default: - $output.= $temp; - } - } - } - - /** - * Disconnect - * - * @access public - */ - function disconnect() - { - $this->_disconnect(NET_SSH2_DISCONNECT_BY_APPLICATION); - } - - /** - * 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() - { - $this->disconnect(); - } - - /** - * Gets Binary Packets - * - * See '6. Binary Packet Protocol' of rfc4253 for more info. - * - * @see Net_SSH2::_send_binary_packet() - * @return String - * @access private - */ - function _get_binary_packet() - { - if (feof($this->fsock)) { - user_error('Connection closed prematurely', E_USER_NOTICE); - return false; - } - - $start = strtok(microtime(), ' ') + strtok(''); // http://php.net/microtime#61838 - $raw = fread($this->fsock, $this->decrypt_block_size); - $stop = strtok(microtime(), ' ') + strtok(''); - - if ($this->decrypt !== false) { - $raw = $this->decrypt->decrypt($raw); - } - - extract(unpack('Npacket_length/Cpadding_length', $this->_string_shift($raw, 5))); - - $remaining_length = $packet_length + 4 - $this->decrypt_block_size; - $buffer = ''; - while ($remaining_length > 0) { - $temp = fread($this->fsock, $remaining_length); - $buffer.= $temp; - $remaining_length-= strlen($temp); - } - if (!empty($buffer)) { - $raw.= $this->decrypt !== false ? $this->decrypt->decrypt($buffer) : $buffer; - $buffer = $temp = ''; - } - - $payload = $this->_string_shift($raw, $packet_length - $padding_length - 1); - $padding = $this->_string_shift($raw, $padding_length); // should leave $raw empty - - if ($this->hmac_check !== false) { - $hmac = fread($this->fsock, $this->hmac_size); - if ($hmac != $this->hmac_check->hash(pack('NNCa*', $this->get_seq_no, $packet_length, $padding_length, $payload . $padding))) { - user_error('Invalid HMAC', E_USER_NOTICE); - return false; - } - } - - //if ($this->decompress) { - // $payload = gzinflate(substr($payload, 2)); - //} - - $this->get_seq_no++; - - if (defined('NET_SSH2_LOGGING')) { - $temp = isset($this->message_numbers[ord($payload[0])]) ? $this->message_numbers[ord($payload[0])] : 'UNKNOWN'; - $this->message_number_log[] = '<- ' . $temp . - ' (' . round($stop - $start, 4) . 's)'; - if (NET_SSH2_LOGGING == NET_SSH2_LOG_COMPLEX) { - $this->message_log[] = substr($payload, 1); - } - } - - return $this->_filter($payload); - } - - /** - * Filter Binary Packets - * - * Because some binary packets need to be ignored... - * - * @see Net_SSH2::_get_binary_packet() - * @return String - * @access private - */ - function _filter($payload) - { - switch (ord($payload[0])) { - case NET_SSH2_MSG_DISCONNECT: - $this->_string_shift($payload, 1); - extract(unpack('Nreason_code/Nlength', $this->_string_shift($payload, 8))); - $this->errors[] = 'SSH_MSG_DISCONNECT: ' . $this->disconnect_reasons[$reason_code] . "\r\n" . utf8_decode($this->_string_shift($payload, $length)); - $this->bitmask = 0; - return false; - case NET_SSH2_MSG_IGNORE: - $payload = $this->_get_binary_packet(); - break; - case NET_SSH2_MSG_DEBUG: - $this->_string_shift($payload, 2); - extract(unpack('Nlength', $this->_string_shift($payload, 4))); - $this->errors[] = 'SSH_MSG_DEBUG: ' . utf8_decode($this->_string_shift($payload, $length)); - $payload = $this->_get_binary_packet(); - break; - case NET_SSH2_MSG_UNIMPLEMENTED: - return false; - case NET_SSH2_MSG_KEXINIT: - if ($this->session_id !== false) { - if (!$this->_key_exchange($payload)) { - $this->bitmask = 0; - return false; - } - $payload = $this->_get_binary_packet(); - } - } - - // see http://tools.ietf.org/html/rfc4252#section-5.4; only called when the encryption has been activated and when we haven't already logged in - if (($this->bitmap & NET_SSH2_MASK_CONSTRUCTOR) && !($this->bitmap & NET_SSH2_MASK_LOGIN) && ord($payload[0]) == NET_SSH2_MSG_USERAUTH_BANNER) { - $this->_string_shift($payload, 1); - extract(unpack('Nlength', $this->_string_shift($payload, 4))); - $this->errors[] = 'SSH_MSG_USERAUTH_BANNER: ' . utf8_decode($this->_string_shift($payload, $length)); - $payload = $this->_get_binary_packet(); - } - - // only called when we've already logged in - if (($this->bitmap & NET_SSH2_MASK_CONSTRUCTOR) && ($this->bitmap & NET_SSH2_MASK_LOGIN)) { - switch (ord($payload[0])) { - case NET_SSH2_MSG_GLOBAL_REQUEST: // see http://tools.ietf.org/html/rfc4254#section-4 - $this->_string_shift($payload, 1); - extract(unpack('Nlength', $this->_string_shift($payload))); - $this->errors[] = 'SSH_MSG_GLOBAL_REQUEST: ' . utf8_decode($this->_string_shift($payload, $length)); - - if (!$this->_send_binary_packet(pack('C', NET_SSH2_MSG_REQUEST_FAILURE))) { - return $this->_disconnect(NET_SSH2_DISCONNECT_BY_APPLICATION); - } - - $payload = $this->_get_binary_packet(); - break; - case NET_SSH2_MSG_CHANNEL_OPEN: // see http://tools.ietf.org/html/rfc4254#section-5.1 - $this->_string_shift($payload, 1); - extract(unpack('N', $this->_string_shift($payload, 4))); - $this->errors[] = 'SSH_MSG_CHANNEL_OPEN: ' . utf8_decode($this->_string_shift($payload, $length)); - - $this->_string_shift($payload, 4); // skip over client channel - extract(unpack('Nserver_channel', $this->_string_shift($payload, 4))); - - $packet = pack('CN3a*Na*', - NET_SSH2_MSG_REQUEST_FAILURE, $server_channel, NET_SSH2_OPEN_ADMINISTRATIVELY_PROHIBITED, 0, '', 0, ''); - - if (!$this->_send_binary_packet($packet)) { - return $this->_disconnect(NET_SSH2_DISCONNECT_BY_APPLICATION); - } - - $payload = $this->_get_binary_packet(); - break; - case NET_SSH2_MSG_CHANNEL_WINDOW_ADJUST: - $payload = $this->_get_binary_packet(); - } - } - - return $payload; - } - - /** - * Gets channel data - * - * Returns the data as a string if it's available and false if not. - * - * @param $client_channel - * @return Mixed - * @access private - */ - function _get_channel_packet($client_channel) - { - if (!empty($this->channel_buffers[$client_channel])) { - return array_shift($this->channel_buffers[$client_channel]); - } - - while (true) { - $response = $this->_get_binary_packet(); - if ($response === false) { - user_error('Connection closed by server', E_USER_NOTICE); - return false; - } - - extract(unpack('Ctype/Nchannel', $this->_string_shift($response, 5))); - - switch ($this->channel_status[$channel]) { - case NET_SSH2_MSG_CHANNEL_OPEN: - switch ($type) { - case NET_SSH2_MSG_CHANNEL_OPEN_CONFIRMATION: - extract(unpack('Nserver_channel', $this->_string_shift($response, 4))); - $this->server_channels[$client_channel] = $server_channel; - $this->_string_shift($response, 4); // skip over (server) window size - $temp = unpack('Npacket_size_client_to_server', $this->_string_shift($response, 4)); - $this->packet_size_client_to_server[$client_channel] = $temp['packet_size_client_to_server']; - return true; - //case NET_SSH2_MSG_CHANNEL_OPEN_FAILURE: - default: - user_error('Unable to open channel', E_USER_NOTICE); - return $this->_disconnect(NET_SSH2_DISCONNECT_BY_APPLICATION); - } - break; - case NET_SSH2_MSG_CHANNEL_REQUEST: - switch ($type) { - case NET_SSH2_MSG_CHANNEL_SUCCESS: - return true; - //case NET_SSH2_MSG_CHANNEL_FAILURE: - default: - user_error('Unable to request pseudo-terminal', E_USER_NOTICE); - return $this->_disconnect(NET_SSH2_DISCONNECT_BY_APPLICATION); - } - - } - - switch ($type) { - case NET_SSH2_MSG_CHANNEL_DATA: - if ($client_channel == NET_SSH2_CHANNEL_EXEC) { - // SCP requires null packets, such as this, be sent. further, in the case of the ssh.com SSH server - // this actually seems to make things twice as fast. more to the point, the message right after - // SSH_MSG_CHANNEL_DATA (usually SSH_MSG_IGNORE) won't block for as long as it would have otherwise. - // in OpenSSH it slows things down but only by a couple thousandths of a second. - $this->_send_channel_packet($client_channel, chr(0)); - } - extract(unpack('Nlength', $this->_string_shift($response, 4))); - $data = $this->_string_shift($response, $length); - if ($client_channel == $channel) { - return $data; - } - if (!isset($this->channel_buffers[$client_channel])) { - $this->channel_buffers[$client_channel] = array(); - } - $this->channel_buffers[$client_channel][] = $data; - break; - case NET_SSH2_MSG_CHANNEL_EXTENDED_DATA: - if ($client_channel == NET_SSH2_CHANNEL_EXEC) { - $this->_send_channel_packet($client_channel, chr(0)); - } - // currently, there's only one possible value for $data_type_code: NET_SSH2_EXTENDED_DATA_STDERR - extract(unpack('Ndata_type_code/Nlength', $this->_string_shift($response, 8))); - $data = $this->_string_shift($response, $length); - if ($client_channel == $channel) { - return $data; - } - if (!isset($this->channel_buffers[$client_channel])) { - $this->channel_buffers[$client_channel] = array(); - } - $this->channel_buffers[$client_channel][] = $data; - break; - case NET_SSH2_MSG_CHANNEL_REQUEST: - extract(unpack('Nlength', $this->_string_shift($response, 4))); - $value = $this->_string_shift($response, $length); - switch ($value) { - case 'exit-signal': - $this->_string_shift($response, 1); - extract(unpack('Nlength', $this->_string_shift($response, 4))); - $this->errors[] = 'SSH_MSG_CHANNEL_REQUEST (exit-signal): ' . $this->_string_shift($response, $length); - $this->_string_shift($response, 1); - extract(unpack('Nlength', $this->_string_shift($response, 4))); - if ($length) { - $this->errors[count($this->errors)].= "\r\n" . $this->_string_shift($response, $length); - } - //case 'exit-status': - default: - // "Some systems may not implement signals, in which case they SHOULD ignore this message." - // -- http://tools.ietf.org/html/rfc4254#section-6.9 - break; - } - break; - case NET_SSH2_MSG_CHANNEL_CLOSE: - $this->_send_binary_packet(pack('CN', NET_SSH2_MSG_CHANNEL_CLOSE, $this->server_channels[$channel])); - return true; - case NET_SSH2_MSG_CHANNEL_EOF: - break; - default: - user_error('Error reading channel data', E_USER_NOTICE); - return $this->_disconnect(NET_SSH2_DISCONNECT_BY_APPLICATION); - } - } - } - - /** - * Sends Binary Packets - * - * See '6. Binary Packet Protocol' of rfc4253 for more info. - * - * @param String $data - * @see Net_SSH2::_get_binary_packet() - * @return Boolean - * @access private - */ - function _send_binary_packet($data) - { - if (feof($this->fsock)) { - user_error('Connection closed prematurely', E_USER_NOTICE); - return false; - } - - //if ($this->compress) { - // // the -4 removes the checksum: - // // http://php.net/function.gzcompress#57710 - // $data = substr(gzcompress($data), 0, -4); - //} - - // 4 (packet length) + 1 (padding length) + 4 (minimal padding amount) == 9 - $packet_length = strlen($data) + 9; - // round up to the nearest $this->encrypt_block_size - $packet_length+= (($this->encrypt_block_size - 1) * $packet_length) % $this->encrypt_block_size; - // subtracting strlen($data) is obvious - subtracting 5 is necessary because of packet_length and padding_length - $padding_length = $packet_length - strlen($data) - 5; - - $padding = ''; - for ($i = 0; $i < $padding_length; $i++) { - $padding.= chr(crypt_random(0, 255)); - } - - // we subtract 4 from packet_length because the packet_length field isn't supposed to include itself - $packet = pack('NCa*', $packet_length - 4, $padding_length, $data . $padding); - - $hmac = $this->hmac_create !== false ? $this->hmac_create->hash(pack('Na*', $this->send_seq_no, $packet)) : ''; - $this->send_seq_no++; - - if ($this->encrypt !== false) { - $packet = $this->encrypt->encrypt($packet); - } - - $packet.= $hmac; - - $start = strtok(microtime(), ' ') + strtok(''); // http://php.net/microtime#61838 - $result = strlen($packet) == fputs($this->fsock, $packet); - $stop = strtok(microtime(), ' ') + strtok(''); - - if (defined('NET_SSH2_LOGGING')) { - $temp = isset($this->message_numbers[ord($data[0])]) ? $this->message_numbers[ord($data[0])] : 'UNKNOWN'; - $this->message_number_log[] = '-> ' . $temp . - ' (' . round($stop - $start, 4) . 's)'; - if (NET_SSH2_LOGGING == NET_SSH2_LOG_COMPLEX) { - $this->message_log[] = substr($data, 1); - } - } - - return $result; - } - - /** - * Sends channel data - * - * Spans multiple SSH_MSG_CHANNEL_DATAs if appropriate - * - * @param Integer $client_channel - * @param String $data - * @return Boolean - * @access private - */ - function _send_channel_packet($client_channel, $data) - { - while (strlen($data) > $this->packet_size_client_to_server[$client_channel]) { - // resize the window, if appropriate - $this->window_size_client_to_server[$client_channel]-= $this->packet_size_client_to_server[$client_channel]; - if ($this->window_size_client_to_server[$client_channel] < 0) { - $packet = pack('CNN', NET_SSH2_MSG_CHANNEL_WINDOW_ADJUST, $this->server_channels[$client_channel], $this->window_size); - if (!$this->_send_binary_packet($packet)) { - return false; - } - $this->window_size_client_to_server[$client_channel]+= $this->window_size; - } - - $packet = pack('CN2a*', - NET_SSH2_MSG_CHANNEL_DATA, - $this->server_channels[$client_channel], - $this->packet_size_client_to_server[$client_channel], - $this->_string_shift($data, $this->packet_size_client_to_server[$client_channel]) - ); - - if (!$this->_send_binary_packet($packet)) { - return false; - } - } - - // resize the window, if appropriate - $this->window_size_client_to_server[$client_channel]-= strlen($data); - if ($this->window_size_client_to_server[$client_channel] < 0) { - $packet = pack('CNN', NET_SSH2_MSG_CHANNEL_WINDOW_ADJUST, $this->server_channels[$client_channel], $this->window_size); - if (!$this->_send_binary_packet($packet)) { - return false; - } - $this->window_size_client_to_server[$client_channel]+= $this->window_size; - } - - return $this->_send_binary_packet(pack('CN2a*', - NET_SSH2_MSG_CHANNEL_DATA, - $this->server_channels[$client_channel], - strlen($data), - $data)); - } - - /** - * Disconnect - * - * @param Integer $reason - * @return Boolean - * @access private - */ - function _disconnect($reason) - { - if ($this->bitmap) { - $data = pack('CNNa*Na*', NET_SSH2_MSG_DISCONNECT, $reason, 0, '', 0, ''); - $this->_send_binary_packet($data); - $this->bitmap = 0; - fclose($this->fsock); - return false; - } - } - - /** - * String Shift - * - * Inspired by array_shift - * - * @param String $string - * @param optional Integer $index - * @return String - * @access private - */ - function _string_shift(&$string, $index = 1) - { - $substr = substr($string, 0, $index); - $string = substr($string, $index); - return $substr; - } - - /** - * 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_SSH2_LOGGING == NET_SSH2_LOG_COMPLEX, an array if NET_SSH2_LOGGING == NET_SSH2_LOG_SIMPLE and false if !defined('NET_SSH2_LOGGING') - * - * @access public - * @return String or Array - */ - function getLog() - { - if (!defined('NET_SSH2_LOGGING')) { - return false; - } - - switch (NET_SSH2_LOGGING) { - case NET_SSH2_LOG_SIMPLE: - return $this->message_number_log; - break; - case NET_SSH2_LOG_COMPLEX: - return $this->_format_log($this->message_log, $this->message_number_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) - { - static $boundary = ':', $long_width = 65, $short_width = 16; - - $output = ''; - for ($i = 0; $i < count($message_log); $i++) { - $output.= $message_number_log[$i] . "\r\n"; - $current_log = $message_log[$i]; - $j = 0; - do { - if (!empty($current_log)) { - $output.= str_pad(dechex($j), 7, '0', STR_PAD_LEFT) . '0 '; - } - $fragment = $this->_string_shift($current_log, $short_width); - $hex = substr( - preg_replace( - '#(.)#es', - '"' . $boundary . '" . str_pad(dechex(ord(substr("\\1", -1))), 2, "0", STR_PAD_LEFT)', - $fragment), - strlen($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, $long_width - $short_width, ' ') . $raw . "\r\n"; - $j++; - } while (!empty($current_log)); - $output.= "\r\n"; - } - - return $output; - } - - /** - * Returns all errors - * - * @return String - * @access public - */ - function getErrors() - { - return $this->errors; - } - - /** - * Returns the last error - * - * @return String - * @access public - */ - function getLastError() - { - return $this->errors[count($this->errors) - 1]; - } - - /** - * Return the server identification. - * - * @return String - * @access public - */ - function getServerIdentification() - { - return $this->server_identifier; - } - - /** - * Return a list of the key exchange algorithms the server supports. - * - * @return Array - * @access public - */ - function getKexAlgorithms() - { - return $this->kex_algorithms; - } - - /** - * Return a list of the host key (public key) algorithms the server supports. - * - * @return Array - * @access public - */ - function getServerHostKeyAlgorithms() - { - return $this->server_host_key_algorithms; - } - - /** - * Return a list of the (symmetric key) encryption algorithms the server supports, when receiving stuff from the client. - * - * @return Array - * @access public - */ - function getEncryptionAlgorithmsClient2Server() - { - return $this->encryption_algorithms_client_to_server; - } - - /** - * Return a list of the (symmetric key) encryption algorithms the server supports, when sending stuff to the client. - * - * @return Array - * @access public - */ - function getEncryptionAlgorithmsServer2Client() - { - return $this->encryption_algorithms_server_to_client; - } - - /** - * Return a list of the MAC algorithms the server supports, when receiving stuff from the client. - * - * @return Array - * @access public - */ - function getMACAlgorithmsClient2Server() - { - return $this->mac_algorithms_client_to_server; - } - - /** - * Return a list of the MAC algorithms the server supports, when sending stuff to the client. - * - * @return Array - * @access public - */ - function getMACAlgorithmsServer2Client() - { - return $this->mac_algorithms_server_to_client; - } - - /** - * Return a list of the compression algorithms the server supports, when receiving stuff from the client. - * - * @return Array - * @access public - */ - function getCompressionAlgorithmsClient2Server() - { - return $this->compression_algorithms_client_to_server; - } - - /** - * Return a list of the compression algorithms the server supports, when sending stuff to the client. - * - * @return Array - * @access public - */ - function getCompressionAlgorithmsServer2Client() - { - return $this->compression_algorithms_server_to_client; - } - - /** - * Return a list of the languages the server supports, when sending stuff to the client. - * - * @return Array - * @access public - */ - function getLanguagesServer2Client() - { - return $this->languages_server_to_client; - } - - /** - * Return a list of the languages the server supports, when receiving stuff from the client. - * - * @return Array - * @access public - */ - function getLanguagesClient2Server() - { - return $this->languages_client_to_server; - } - - /** - * Returns the server public host key. - * - * Caching this the first time you connect to a server and checking the result on subsequent connections - * is recommended. Returns false if the server signature is not signed correctly with the public host key. - * - * @return Mixed - * @access public - */ - function getServerPublicHostKey() - { - $signature = $this->signature; - $server_public_host_key = $this->server_public_host_key; - - extract(unpack('Nlength', $this->_string_shift($server_public_host_key, 4))); - $this->_string_shift($server_public_host_key, $length); - - switch ($this->signature_format) { - case 'ssh-dss': - $temp = unpack('Nlength', $this->_string_shift($server_public_host_key, 4)); - $p = new Math_BigInteger($this->_string_shift($server_public_host_key, $temp['length']), -256); - - $temp = unpack('Nlength', $this->_string_shift($server_public_host_key, 4)); - $q = new Math_BigInteger($this->_string_shift($server_public_host_key, $temp['length']), -256); - - $temp = unpack('Nlength', $this->_string_shift($server_public_host_key, 4)); - $g = new Math_BigInteger($this->_string_shift($server_public_host_key, $temp['length']), -256); - - $temp = unpack('Nlength', $this->_string_shift($server_public_host_key, 4)); - $y = new Math_BigInteger($this->_string_shift($server_public_host_key, $temp['length']), -256); - - /* The value for 'dss_signature_blob' is encoded as a string containing - r, followed by s (which are 160-bit integers, without lengths or - padding, unsigned, and in network byte order). */ - $temp = unpack('Nlength', $this->_string_shift($signature, 4)); - if ($temp['length'] != 40) { - user_error('Invalid signature', E_USER_NOTICE); - return $this->_disconnect(NET_SSH2_DISCONNECT_KEY_EXCHANGE_FAILED); - } - - $r = new Math_BigInteger($this->_string_shift($signature, 20), 256); - $s = new Math_BigInteger($this->_string_shift($signature, 20), 256); - - if ($r->compare($q) >= 0 || $s->compare($q) >= 0) { - user_error('Invalid signature', E_USER_NOTICE); - return $this->_disconnect(NET_SSH2_DISCONNECT_KEY_EXCHANGE_FAILED); - } - - $w = $s->modInverse($q); - - $u1 = $w->multiply(new Math_BigInteger(sha1($this->session_id), 16)); - list(, $u1) = $u1->divide($q); - - $u2 = $w->multiply($r); - list(, $u2) = $u2->divide($q); - - $g = $g->modPow($u1, $p); - $y = $y->modPow($u2, $p); - - $v = $g->multiply($y); - list(, $v) = $v->divide($p); - list(, $v) = $v->divide($q); - - if (!$v->equals($r)) { - user_error('Bad server signature', E_USER_NOTICE); - return $this->_disconnect(NET_SSH2_DISCONNECT_HOST_KEY_NOT_VERIFIABLE); - } - - break; - case 'ssh-rsa': - $temp = unpack('Nlength', $this->_string_shift($server_public_host_key, 4)); - $e = new Math_BigInteger($this->_string_shift($server_public_host_key, $temp['length']), -256); - - $temp = unpack('Nlength', $this->_string_shift($server_public_host_key, 4)); - $n = new Math_BigInteger($this->_string_shift($server_public_host_key, $temp['length']), -256); - $nLength = $temp['length']; - - /* - $temp = unpack('Nlength', $this->_string_shift($signature, 4)); - $signature = $this->_string_shift($signature, $temp['length']); - - if (!class_exists('Crypt_RSA')) { - require_once('Crypt/RSA.php'); - } - - $rsa = new Crypt_RSA(); - $rsa->setSignatureMode(CRYPT_RSA_SIGNATURE_PKCS1); - $rsa->loadKey(array('e' => $e, 'n' => $n), CRYPT_RSA_PUBLIC_FORMAT_RAW); - if (!$rsa->verify($this->session_id, $signature)) { - user_error('Bad server signature', E_USER_NOTICE); - return $this->_disconnect(NET_SSH2_DISCONNECT_HOST_KEY_NOT_VERIFIABLE); - } - */ - - $temp = unpack('Nlength', $this->_string_shift($signature, 4)); - $s = new Math_BigInteger($this->_string_shift($signature, $temp['length']), 256); - - // validate an RSA signature per "8.2 RSASSA-PKCS1-v1_5", "5.2.2 RSAVP1", and "9.1 EMSA-PSS" in the - // following URL: - // ftp://ftp.rsasecurity.com/pub/pkcs/pkcs-1/pkcs-1v2-1.pdf - - // also, see SSHRSA.c (rsa2_verifysig) in PuTTy's source. - - if ($s->compare(new Math_BigInteger()) < 0 || $s->compare($n->subtract(new Math_BigInteger(1))) > 0) { - user_error('Invalid signature', E_USER_NOTICE); - return $this->_disconnect(NET_SSH2_DISCONNECT_KEY_EXCHANGE_FAILED); - } - - $s = $s->modPow($e, $n); - $s = $s->toBytes(); - - $h = pack('N4H*', 0x00302130, 0x0906052B, 0x0E03021A, 0x05000414, sha1($this->session_id)); - $h = chr(0x01) . str_repeat(chr(0xFF), $nLength - 3 - strlen($h)) . $h; - - if ($s != $h) { - user_error('Bad server signature', E_USER_NOTICE); - return $this->_disconnect(NET_SSH2_DISCONNECT_HOST_KEY_NOT_VERIFIABLE); - } - } - - return $this->server_public_host_key; - } -} \ No newline at end of file -- cgit v1.2.3