protocal.php

<?php


$user_name = "{'name': 'peet','timestamp' : " . time() . "}";
$encrypt_method = "aes128";
$secret_key = '123';
$secret_iv = '456';


// hash
$key = hash('sha256', $secret_key);


// iv - encrypt method AES-256-CBC expects 16 bytes - else you will get a
// warning
$iv = substr(hash('sha256', $secret_iv), 0, 16);


$output = openssl_encrypt($user_name, $encrypt_method, $key, 0, $iv);


print_r($output . "<br><br>");


$output = openssl_decrypt($output, $encrypt_method, $key, 0, $iv);


print($output);