/**
* Decrypt a string
*
* @param string $encoded
* @return string
*/
public function decrypt($encoded)
{
$decoded = \base64_decode($encoded);
\Sodium::memzero($encoded);
$nonce = \mb_substr($decoded, 0, \Sodium::CRYPTO_SECRETBOX_NONCEBYTES, '8bit');
$ciphertext = \mb_substr($decoded, \Sodium::CRYPTO_SECRETBOX_NONCEBYTES, null, '8bit');
$decrypted = \Sodium::crypto_secretbox_open($ciphertext, $nonce, $this->key->getKey());
\Sodium::memzero($decoded);
\Sodium::memzero($nonce);
\Sodium::memzero($ciphertext);
return $decrypted;
}
