Method __construct

/**
 * Initialises an RFC6238-compatible TOTP generator. Please note that this
 * class does not implement the constraint in the last paragraph of §5.2
 * of RFC6238. It's up to you to ensure that the same user/device does not
 * retry validation within the same Time Step.
 *
 * @param   int     $timeStep        The Time Step (in seconds). Use 30 to be compatible with Google Authenticator.
 * @param   int     $passCodeLength  The generated passcode length. Default: 6 digits.
 * @param   int     $secretLength    The length of the secret key. Default: 10 bytes (80 bits).
 * @param   Object  $base32          The base32 en/decrypter
 */
public function __construct($timeStep = 30, $passCodeLength = 6, $secretLength = 10, $base32 = null)
{
    $this->_timeStep = $timeStep;
    $this->_passCodeLength = $passCodeLength;
    $this->_secretLength = $secretLength;
    $this->_pinModulo = pow(10, $this->_passCodeLength);
    if (\is_null($base32)) {
        $this->_base32 = new Base32();
    } else {
        $this->_base32 = $base32;
    }
}