public function getValue(PrivateKey $privateKey = null)
{
$value = $this->value;
if (!$privateKey) {
return $value;
}
$chunkSize = $privateKey->getKeySize() / 8;
$chunkCount = intval(ceil(strlen($value) / $chunkSize));
$plainText = '';
for ($i = 0; $i < $chunkCount; $i++) {
$chunkData = substr($value, $i * $chunkSize, $chunkSize);
$plainText .= $privateKey->decrypt($chunkData);
}
if (empty($plainText)) {
throw new \Exception(sprintf("Error decrypting text - OpenSSL Error string '%s'", openssl_error_string()));
}
return $plainText;
}
