/**
* Extended Crypt_Rijndael::_setup()
*
* Optimizing the key schedule arrays ($w, $dw) for _encryptBlock() and _decryptBlock() after Crypt_Rijndael::_setup()
*
* @see Crypt_Rijndael::_setup()
* @access private
*/
function _setup()
{
if (!$this->changed) {
return;
}
$this->w = $this->dw = array();
parent::_setup();
$this->dw = array_reverse($this->dw);
$w = array_pop($this->w);
$dw = array_pop($this->dw);
foreach ($this->w as $r => $wr) {
foreach ($wr as $c => $wc) {
$w[] = $wc;
$dw[] = $this->dw[$r][$c];
}
}
$this->w = $w;
$this->dw = $dw;
}