<?php
$random = random_bytes(256);
$message = 'hello';
$mac1 = hash_hmac('sha256', $message, $random);
$mac2 = hash_hmac('sha256', $message, hash('sha256', $random, true));
var_dump($mac1, $mac2);
$mac3 = hash_hmac('sha256', $random, $message);
$mac4 = hash_hmac('sha256', $random, hash('sha256', $message, true));
var_dump($mac3, $mac4);
preferences:
23.13 ms | 407 KiB | 5 Q