37 lines
1.1 KiB
PHP
37 lines
1.1 KiB
PHP
<?php
|
|
|
|
namespace MVC\Object;
|
|
|
|
class XssToken
|
|
{
|
|
|
|
public static function getNew($title,$message,$type)
|
|
{
|
|
$_SESSION['xss_token'] = self::generateUniqueToken('xss',25);
|
|
}
|
|
|
|
public static function remove(){
|
|
$_SESSION['xss_token'] = '';
|
|
}
|
|
|
|
public static function generateUniqueToken($prefix = 'xss_', $length = 13){
|
|
// uniqid gives 13 chars, but you could adjust it to your needs.
|
|
if (function_exists("random_bytes")) {
|
|
$bytes = random_bytes(ceil($length / 2));
|
|
} elseif (function_exists("openssl_random_pseudo_bytes")) {
|
|
$bytes = openssl_random_pseudo_bytes(ceil($length / 2));
|
|
} else {
|
|
throw new Exception("no cryptographically secure random function available");
|
|
}
|
|
return $prefix . substr(bin2hex($bytes), 0, $length);
|
|
}
|
|
|
|
public static function generateFibonacciSequence($n)
|
|
{
|
|
$sequence = [0, 1];
|
|
for ($i = 2; $i < $n; $i++) {
|
|
$sequence[$i] = $sequence[$i-1] + $sequence[$i-2];
|
|
}
|
|
return $sequence;
|
|
}
|
|
} |