WindowsLiveLogin::setOldSecret

function setOldSecret($secret)
{
	if (!$secret) {
		return;
	}
	if (strlen($secret) < 16) {
		$this->fatal("Error: setOldSecret: Secret key is expected to be non-null and longer than 16 characters.");
	}

	$this->_oldsignkey  = $this->derive($secret, "SIGNATURE");
	$this->_oldcryptkey = $this->derive($secret, "ENCRYPTION");
}