public function generateSecret()
{
$secret = "";
for ($i = 1; $i <= self::$SECRET_LENGTH; $i++) {
$c = rand(0, 255);
$secret .= pack("c", $c);
}
$base32 = new FixedBitNotation(5, 'ABCDEFGHIJKLMNOPQRSTUVWXYZ234567', true, true);
return $base32->encode($secret);
}
/**
* Generate a code (for a given time)
*
* @param string $secret
* @param timestamp $time
* @return int
*/
public function getCode($secret, $time = null)
{
if (!$time) {
$time = floor(time() / 30);
}
$base32 = new FixedBitNotation(5, 'ABCDEFGHIJKLMNOPQRSTUVWXYZ234567', TRUE, TRUE);
$secret = $base32->decode($secret);
$time = pack("N", $time);
$time = str_pad($time, 8, chr(0), STR_PAD_LEFT);
$hash = hash_hmac('sha1', $time, $secret, true);
$offset = ord(substr($hash, -1));
$offset = $offset & 0xf;
$truncatedHash = self::hashToInt($hash, $offset) & 0x7fffffff;
$pinValue = str_pad($truncatedHash % self::$PIN_MODULO, 6, "0", STR_PAD_LEFT);
return $pinValue;
}
/**
* @return string
*/
public function generateSecret()
{
$secret = "";
for ($i = 1; $i <= $this->secretLength; $i++) {
$c = rand(0, 255);
$secret .= pack("c", $c);
}
$base32 = new FixedBitNotation(5, 'ABCDEFGHIJKLMNOPQRSTUVWXYZ234567', TRUE, TRUE);
return $base32->encode($secret);
}
