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<?php /** * Pure-PHP implementation of SCP. * * PHP versions 4 and 5 * * The API for this library is modeled after the API from PHP's {@link http://php.net/book.ftp FTP extension}. * * Here's a short example of how to use this library: * <code> * <?php * include 'Net/SCP.php'; * include 'Net/SSH2.php'; * * $ssh = new Net_SSH2('www.domain.tld'); * if (!$ssh->login('username', 'password')) { * exit('bad login'); * } * $scp = new Net_SCP($ssh); * $scp->put('abcd', str_repeat('x', 1024*1024)); * ?> * </code> * * LICENSE: Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. * * @category Net * @package Net_SCP * @author Jim Wigginton <terrafrost@php.net> * @copyright MMX Jim Wigginton * @license http://www.opensource.org/licenses/mit-license.html MIT License * @link http://phpseclib.sourceforge.net */ /**#@+ * @access public * @see Net_SCP::put() */ /** * Reads data from a local file. */ define('NET_SCP_LOCAL_FILE', 1); /** * Reads data from a string. */ define('NET_SCP_STRING', 2); /**#@-*/ /**#@+ * @access private * @see Net_SCP::_send() * @see Net_SCP::_receive() */ /** * SSH1 is being used. */ define('NET_SCP_SSH1', 1); /** * SSH2 is being used. */ define('NET_SCP_SSH2', 2); /**#@-*/ /** * Pure-PHP implementations of SCP. * * @package Net_SCP * @author Jim Wigginton <terrafrost@php.net> * @access public */ class Net_SCP { /** * SSH Object * * @var Object * @access private */ public $ssh; /** * Packet Size * * @var Integer * @access private */ public $packet_size; /** * Mode * * @var Integer * @access private */ public $mode; /** * Default Constructor. * * Connects to an SSH server * * @param String $host * @param optional Integer $port * @param optional Integer $timeout * * @return Net_SCP * @access public */ public function __construct($ssh) { if (!is_object($ssh)) { return; } switch (strtolower(get_class($ssh))) { case'net_ssh2': $this->mode = NET_SCP_SSH2; break; case 'net_ssh1': $this->packet_size = 50000; $this->mode = NET_SCP_SSH1; break; default: return; } $this->ssh = $ssh; } /** * Uploads a file to the SCP server. * * By default, Net_SCP::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_SCP::get(), you will get a file, twelve bytes * long, containing 'filename.ext' as its contents. * * Setting $mode to NET_SCP_LOCAL_FILE will change the above behavior. With NET_SCP_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 $mode * @param optional Callable $callback * * @return Boolean * @access public */ public function put($remote_file, $data, $mode = NET_SCP_STRING, $callback = null) { if (!isset($this->ssh)) { return false; } if (!$this->ssh->exec('scp -t "'.$remote_file.'"', false)) { // -t = to return false; } $temp = $this->_receive(); if ($temp !== chr(0)) { return false; } if ($this->mode == NET_SCP_SSH2) { $this->packet_size = $this->ssh->packet_size_client_to_server[NET_SSH2_CHANNEL_EXEC] - 4; } $remote_file = basename($remote_file); if ($mode == NET_SCP_STRING) { $size = strlen($data); } else { if (!is_file($data)) { user_error("$data is not a valid file", E_USER_NOTICE); return false; } $fp = @fopen($data, 'rb'); if (!$fp) { fclose($fp); return false; } $size = filesize($data); } $this->_send('C0644 '.$size.' '.$remote_file."\n"); $temp = $this->_receive(); if ($temp !== chr(0)) { return false; } $sent = 0; while ($sent < $size) { $temp = $mode & NET_SCP_STRING ? substr($data, $sent, $this->packet_size) : fread($fp, $this->packet_size); $this->_send($temp); $sent += strlen($temp); if (is_callable($callback)) { call_user_func($callback, $sent); } } $this->_close(); if ($mode != NET_SCP_STRING) { fclose($fp); } return true; } /** * Downloads a file from the SCP 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 $local_file * * @return Mixed * @access public */ public function get($remote_file, $local_file = false) { if (!isset($this->ssh)) { return false; } if (!$this->ssh->exec('scp -f "'.$remote_file.'"', false)) { // -f = from return false; } $this->_send("\0"); if (!preg_match('#(?<perms>[^ ]+) (?<size>\d+) (?<name>.+)#', rtrim($this->_receive()), $info)) { return false; } $this->_send("\0"); $size = 0; if ($local_file !== false) { $fp = @fopen($local_file, 'wb'); if (!$fp) { return false; } } $content = ''; while ($size < $info['size']) { $data = $this->_receive(); // SCP usually seems to split stuff out into 16k chunks $size += strlen($data); if ($local_file === false) { $content .= $data; } else { fputs($fp, $data); } } $this->_close(); if ($local_file !== false) { fclose($fp); return true; } return $content; } /** * Sends a packet to an SSH server * * @param String $data * * @access private */ public function _send($data) { switch ($this->mode) { case NET_SCP_SSH2: $this->ssh->_send_channel_packet(NET_SSH2_CHANNEL_EXEC, $data); break; case NET_SCP_SSH1: $data = pack('CNa*', NET_SSH1_CMSG_STDIN_DATA, strlen($data), $data); $this->ssh->_send_binary_packet($data); } } /** * Receives a packet from an SSH server * * @return String * @access private */ public function _receive() { switch ($this->mode) { case NET_SCP_SSH2: return $this->ssh->_get_channel_packet(NET_SSH2_CHANNEL_EXEC, true); case NET_SCP_SSH1: if (!$this->ssh->bitmap) { return false; } while (true) { $response = $this->ssh->_get_binary_packet(); switch ($response[NET_SSH1_RESPONSE_TYPE]) { case NET_SSH1_SMSG_STDOUT_DATA: extract(unpack('Nlength', $response[NET_SSH1_RESPONSE_DATA])); return $this->ssh->_string_shift($response[NET_SSH1_RESPONSE_DATA], $length); case NET_SSH1_SMSG_STDERR_DATA: break; case NET_SSH1_SMSG_EXITSTATUS: $this->ssh->_send_binary_packet(chr(NET_SSH1_CMSG_EXIT_CONFIRMATION)); fclose($this->ssh->fsock); $this->ssh->bitmap = 0; return false; default: user_error('Unknown packet received', E_USER_NOTICE); return false; } } } } /** * Closes the connection to an SSH server * * @access private */ public function _close() { switch ($this->mode) { case NET_SCP_SSH2: $this->ssh->_close_channel(NET_SSH2_CHANNEL_EXEC, true); break; case NET_SCP_SSH1: $this->ssh->disconnect(); } } }