public function __construct($params)
{
// The sftp:// scheme has to be manually registered via inclusion of
// the 'Net/SFTP/Stream.php' file which registers the Net_SFTP_Stream
// stream wrapper as a side effect.
// A slightly better way to register the stream wrapper is available
// since phpseclib 0.3.7 in the form of a static call to
// Net_SFTP_Stream::register() which will trigger autoloading if
// necessary.
// TODO: Call Net_SFTP_Stream::register() instead when phpseclib is
// updated to 0.3.7 or higher.
require_once 'Net/SFTP/Stream.php';
$this->host = $params['host'];
$proto = strpos($this->host, '://');
if ($proto != false) {
$this->host = substr($this->host, $proto + 3);
}
$this->user = $params['user'];
$this->password = $params['password'];
$this->root = isset($params['root']) ? $this->cleanPath($params['root']) : '/';
if ($this->root[0] != '/') {
$this->root = '/' . $this->root;
}
if (substr($this->root, -1, 1) != '/') {
$this->root .= '/';
}
$hostKeys = $this->readHostKeys();
$this->client = new \Net_SFTP($this->host);
// The SSH Host Key MUST be verified before login().
$currentHostKey = $this->client->getServerPublicHostKey();
if (array_key_exists($this->host, $hostKeys)) {
if ($hostKeys[$this->host] != $currentHostKey) {
throw new \Exception('Host public key does not match known key');
}
} else {
$hostKeys[$this->host] = $currentHostKey;
$this->writeHostKeys($hostKeys);
}
if (!$this->client->login($this->user, $this->password)) {
throw new \Exception('Login failed');
}
}
/**
* Returns the connection.
*
* @return \Net_SFTP connected client instance
* @throws \Exception when the connection failed
*/
public function getConnection()
{
if (!is_null($this->client)) {
return $this->client;
}
$hostKeys = $this->readHostKeys();
$this->client = new \Net_SFTP($this->host);
// The SSH Host Key MUST be verified before login().
$currentHostKey = $this->client->getServerPublicHostKey();
if (array_key_exists($this->host, $hostKeys)) {
if ($hostKeys[$this->host] != $currentHostKey) {
throw new \Exception('Host public key does not match known key');
}
} else {
$hostKeys[$this->host] = $currentHostKey;
$this->writeHostKeys($hostKeys);
}
if (!$this->client->login($this->user, $this->password)) {
throw new \Exception('Login failed');
}
return $this->client;
}
