/**
* Get a substitution table entry
*
* @param int $pos
* @return string
*/
public function getSubstitutionTableEntry($pos)
{
$str = $this->plaintext_key;
if ($pos != 0) {
$str = Helper::rotate($str, $pos);
}
return $str;
}
/**
* Make a run of rotation
*
* @param null $rotation
* @return $this
*/
public function rotate($rotation = null)
{
if (is_null($rotation)) {
$rotation = $this->rotation;
}
$cipher = $this->getSubstitutions();
$this->setSubstitutions(array(Helper::rotate($cipher[0], $rotation)));
return $this;
}
/**
* Reset the substitution table to its original form
*
* @return $this
*/
protected function _reset()
{
parent::_reset();
$this->substitution_table->setSubstitutions(array(str_split(Helper::rotate($this->substitution_table->getPlaintextKey(), $this->rotation_value - 1))));
return $this;
}
