I'm smiling while I read this.
Every single bit of this news is sooo PHP and one of the reasons this awkward mess of a PL is so successful.
They find something new or something they need and bolt it on. Just like that. End of story. A vote on the core team, a little coding and *BAM* PHP has a new inner API function with what has to be the most over-the-top all-out-PHP-style name for an inner API function ever - sodium_crypto_box_keypair_from_secretkey_and_publickey($ecdh_secret, $ecdh_public); (seriously, this is no joke).
Totally LOL. Takes the cake for inner function names ten times over, even by PHP standards, which is quite a stunt. And right away PHP has up-to-date hard crypto that even a simpleton can use.
You have to hand it to the PHP crew - they actually get shit done, no matter what.