public function authenticate(Client $client)
{
$login_string = pack('CC', self::VER, mb_strlen($this->username, 'ASCII'));
$login_string .= $this->username;
$login_string .= pack('C', mb_strlen($this->password, 'ASCII'));
$login_string .= $this->password;
$client->send($login_string);
$response = unpack('Cver/Cstatus', $client->recv());
if (!isset($response['ver'], $response['status'])) {
throw new Exception('PlainAuth: unable to parse response');
}
if ($response['ver'] !== self::VER) {
throw new Exception(sprintf('PlainAuth: version mismatch (server: %d / client: %d)', $response['ver'], self::VER));
}
if ($response['status'] !== self::STATUS_SUCCESS) {
throw new Exception('PlainAuth: unsuccessful login');
}
return true;
}
