/**
* Encrypt data with a private key.
*
* @param string $unencryptedData
*
* @throws \LogicException
*
* @return string
*/
protected function encrypt($unencryptedData)
{
$privateKey = openssl_pkey_get_private($this->privateKey->getKeyPath(), $this->privateKey->getPassPhrase());
$privateKeyDetails = @openssl_pkey_get_details($privateKey);
if ($privateKeyDetails === null) {
throw new \LogicException(sprintf('Could not get details of private key: %s', $this->privateKey->getKeyPath()));
}
$chunkSize = ceil($privateKeyDetails['bits'] / 8) - 11;
$output = '';
while ($unencryptedData) {
$chunk = substr($unencryptedData, 0, $chunkSize);
$unencryptedData = substr($unencryptedData, $chunkSize);
if (openssl_private_encrypt($chunk, $encrypted, $privateKey) === false) {
// @codeCoverageIgnoreStart
throw new \LogicException('Failed to encrypt data');
// @codeCoverageIgnoreEnd
}
$output .= $encrypted;
}
openssl_pkey_free($privateKey);
return base64_encode($output);
}
