CMS-CSE/core/class/blacklist.class.php

<?php

class blacklist {

    private static $log_file = '../blacklist/ip_attempts.log';
    private static $blacklist_file = '../blacklist/ip.txt';
    private static $max_attempts = 5;
    private static $time_window = 10 * 60; // 10 minutes en secondes

    public static function execute(?string $_from = NULL) {
        self::check($_from);
    }

    public static function isValidIPv4() {
        return filter_var($_SERVER['REMOTE_ADDR'], FILTER_VALIDATE_IP, FILTER_FLAG_IPV4) !== false;
    }

    private static function getFullUrl() { $protocol = (!empty($_SERVER['HTTPS']) && $_SERVER['HTTPS'] !== 'off') ? 'https://' : 'http://';
        return $protocol . $_SERVER['SERVER_NAME'] . $_SERVER['REQUEST_URI'];
    }

    private static function readBalcklist(){ // Charger les tentatives existantes
        $attempts = [];
        if (file_exists(self::$log_file)) {
            $lines = file(self::$log_file, FILE_IGNORE_NEW_LINES);
            foreach ($lines as $line) {
                list($ip, $timestamp) = explode(',', $line);
                $attempts[] = ['ip' => $ip, 'timestamp' => strtotime($timestamp)];
            }
        }
        return $attempts;
    }

    private static function checkBlacklist(string $_ip){ // Vérifier si l'IP est déjà blacklistée
        $blacklisted = FALSE;
        if (file_exists(self::$blacklist_file)) {
            $blacklisted_ips = file(self::$blacklist_file, FILE_IGNORE_NEW_LINES);
            $blacklisted = in_array($_ip, $blacklisted_ips);
        }
        return $blacklisted;
    }

    private static function addBalcklist(string $_ip){ // Ajouter une nouvelle tentative
        file_put_contents(self::$log_file, "$_ip," . date('Y-m-d H:i:s') . ", " . $_SERVER["REQUEST_METHOD"] . "," . self::getFullUrl() . "\n", FILE_APPEND);
    }
    
    private static function check(){ // Compter les tentatives récentes
        $now = time();
        $time_window = self::$time_window;
        $attempts = self::readBalcklist();
        $ip = $_SERVER['REMOTE_ADDR'];
        $blacklisted = self::checkBlacklist($ip);

        self::addBalcklist($ip);

        $recent_attempts = array_filter($attempts, function ($attempt) use ($ip, $now, $time_window) {
            return $attempt['ip'] === $ip && ($now - $attempt['timestamp']) <= $time_window;
        });

        if (count($recent_attempts) + 1 > self::$max_attempts && !self::checkBlacklist($ip)) {
            file_put_contents(self::$blacklist_file, "$ip\n", FILE_APPEND);
            $blacklisted = TRUE;
        }

        if ($blacklisted == TRUE) {
            header('HTTP/1.0 401 Unauthorized');
            echo "Votre IP (" . $ip . ") a été blacklistée pour trop de tentatives.";
            exit();
        } else {
            echo "Votre IP est : " . $ip . ". Nombre de tentatives récentes : " . (count($recent_attempts) + 1);
            exit();
        }
    }

    public static function itIs(){ // Est-il blacklisté
        $ip = $_SERVER['REMOTE_ADDR'];
        if(self::checkBlacklist($ip)){
            echo "Votre IP (" . $ip . ") a été blacklistée pour trop de tentatives.";
            exit();
        }
    }

}