function crypt($key)
{
if (!empty($this->crypt)) {
$this->crypt = Paste::cxor($this->crypt, $key);
} else {
$this->crypt = Paste::cxor(sha1($key), $key);
}
if ($this->crypt == sha1($key)) {
$this->content = Paste::cxor(base64_decode($this->content), $key);
} else {
$this->content = base64_encode(Paste::cxor($this->content, $key));
}
}
