Changeset 44953 for trunk/src/wp-includes/sodium_compat/namespaced/Core/HChaCha20.php

General: Add sodium_compat library for crypto APIs in PHP < 7.2

This adds a pure PHP implementation of the cryptographic functions supported in PHP 7.2+. It provides the necessary backwards compatibility required to support signature verification and other security features going forward across all supported PHP versions.

Props paragoninitiativeenterprises
Fixes #45806. See #39309.