private function createKeySchedule()
{
$end = sizeof($this->roundKey) - 1;
$first = 0;
$rcon = 0;
for ($k = 0; $k < 20; $k++) {
$endColumn = $this->getColumn($this->roundKey, $end);
$rconColumn = $this->getColumn($this->rcon, $rcon);
$firstColumn = $this->getColumn($this->roundKey, $first);
$endColumn = AES::rotWord($endColumn);
$endColumn = AES::subWord($endColumn, $this->subArray);
for ($i = 0; $i < sizeof($endColumn); $i++) {
$bin_one = str_pad(base_convert($endColumn[$i], 16, 2), 8, "0", STR_PAD_LEFT);
$bin_two = str_pad(base_convert($firstColumn[$i], 16, 2), 8, "0", STR_PAD_LEFT);
$bin_three = str_pad(base_convert($rconColumn[$i], 16, 2), 8, "0", STR_PAD_LEFT);
$xor = AES::ffAdd($bin_one, $bin_two);
$xor_bin = str_pad(base_convert($xor, 16, 2), 8, "0", STR_PAD_LEFT);
$this->roundKey[$i][] = AES::ffAdd($xor_bin, $bin_three);
}
$rcon++;
$end++;
$first++;
for ($j = 0; $j < 3; $j++) {
$endColumn = $this->getColumn($this->roundKey, $end);
$firstColumn = $this->getColumn($this->roundKey, $first);
for ($i = 0; $i < sizeof($endColumn); $i++) {
$bin_one = str_pad(base_convert($endColumn[$i], 16, 2), 8, "0", STR_PAD_LEFT);
$bin_two = str_pad(base_convert($firstColumn[$i], 16, 2), 8, "0", STR_PAD_LEFT);
$this->roundKey[$i][] = AES::ffAdd($bin_one, $bin_two);
}
$end++;
$first++;
}
}
//rotWord
//take last column and rotate one column
//sub byte sin this last column
//xor the first column with the last column and the next row in Rcon
}