(PHP 7 >= 7.2.0, PHP 8)
sodium_crypto_kx_client_session_keys — Calculate the client-side session keys.
$client_key_pair, string $server_key): arrayCalculate the client-side session keys, using the X25519 + BLAKE2b key-exchange method.
client_key_pairserver_keyAn array consisting of two strings. The first should be used for receiving data from the server. The second should be used for sending data to the server.