protected function _hashSecret($key) {
		$size = mcrypt_enc_get_key_size(static::$_resource);

		if (strlen($key) >= $size) {
			return $key;
		}

		return substr(hash('sha256', $key, true), 0, $size);
	}
protected function _hashSecret($key) {
		$size = mcrypt_enc_get_key_size(static::$_resource);

		if (strlen($key) >= $size) {
			return $key;
		}

		return substr(hash('sha256', $key, true), 0, $size);
	}
protected function _hashSecret ( $ key ) { $ size = mcrypt_enc_get_key_size ( static :: $ _resource ) ; if ( strlen ( $ key ) >= $ size ) { return $ key ; } return substr ( hash ( 'sha256' , $ key , true ) , 0 , $ size ) ; }
Hashes the given secret to make harder to detect.

This method figures out the appropriate key size for the chosen encryption algorithm and
then hashes the given key accordingly. Note that if the key has already the needed length,
it is considered to be hashed (secure) already and is therefore not hashed again. This lets
you change the hashing method in your own code if you like.

The default `MCRYPT_RIJNDAEL_128` key should be 32 byte long `sha256` is used as the hashing
algorithm. If the key size is shorter than the one generated by `sha256`, the first n bytes
will be used.

@link http://php.net/function.mcrypt-enc-get-key-size.php
@param string $key The possibly too weak key.
@return string The hashed (raw) key.
Hashes the given secret to make harder to detect .