https://paragonie.com/book/pecl-libsodium/read/00-intro.md ~50 functions
https://paragonie.com/book/pecl-libsodium/read/00-intro.md#terms-concepts
https://paragonie.com/book/pecl-libsodium/read/01-quick-start.md
Better docs: https://dev.to/paragonie/libsodium-quick-reference
Recipes: https://paragonie.com/book/pecl-libsodium/read/09-recipes.md
https://github.com/jedisct1/libsodium-php
JCryptCipher https://issues.joomla.org/tracker/joomla-cms/16754
Polyfil https://github.com/mollie/polyfill-libsodium
php7 nonce