Is there an Encryption class? What am I missing?

Hello, if encryption relies on PHP 7.2 maybe provide a simple fall-back alternative for those with 7.1 or hosting that just doesn't have the module? I decided to use Open SSL encryption, with examples from this guy
https://bhoover.com/using-php-openssl_en...crypt-data
...or maybe....by the time CI4 comes out 7.2 will be more widespread and available. Is Sodium the encryption module that CI4 will use?

You can see things I made with codeigniter here: itart.pro its not overly impressive as I have very little time to learn.