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<?php
/*
* Looking Glass - An easy to deploy Looking Glass
* Copyright (C) 2014 Guillaume Mazoyer <gmazoyer@gravitons.in>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
require_once 'authentication.php';
class SSH extends Authentication {
private $port;
public function __construct($config) {
parent::__construct($config);
$this->port = isset($this->config['port']) ? $this->config['port'] : 22;
}
protected function check_config() {
if ($this->config['auth'] == 'ssh-password') {
if (!isset($this->config['user']) || !isset($this->config['pass'])) {
throw new Exception('User and password required for ssh-password.');
}
}
if ($this->config['auth'] == 'ssh-key') {
if (!isset($this->config['user']) || !isset($this->config['public_key'])
|| !isset($this->config['private_key'])) {
throw new Exception('User and key pair required for ssh-key.');
}
}
}
public function connect() {
$this->connection = ssh2_connect($this->config['host'], $this->port);
if (!$this->connection) {
throw new Exception('Cannot connect to router.');
}
$success = false;
if ($this->config['auth'] == 'ssh-password') {
$success = ssh2_auth_password($this->connection, $this->config['user'],
$this->config['pass']);
} else if ($this->config['auth'] == 'ssh-key') {
if (isset($this->config['pass'])) {
$success = ssh2_auth_pubkey_file($this->connection, $this->config['user'],
$this->config['public_key'], $this->config['private_key'],
$this->config['pass']);
} else {
$success = ssh2_auth_pubkey_file($this->connection, $this->config['user'],
$this->config['public_key'], $this->config['private_key']);
}
} else {
throw new Exception('Unknown type of connection for SSH.');
}
if (!success) {
throw new Exception('SSH authentication failed.');
}
}
public function send_command($command) {
if ($this->connection == null) {
$this->connect();
}
if (!($stream = ssh2_exec($this->connection, $command))) {
throw new Exception('SSH command failed');
}
stream_set_blocking($stream, true);
$data = '';
while ($buf = fread($stream, 4096)) {
$data .= $buf;
}
fclose($stream);
return $data;
}
public function disconnect() {
$this->send_command('exit');
$this->connection = null;
}
public function __destruct() {
parent::__destruct();
}
}
// End of ssh.php
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