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<?php
# $Id: security.php 2845 2020-07-04 17:54:03Z rexy $

$language = 'en';
if (isset($_SERVER['HTTP_ACCEPT_LANGUAGE'])) {
    $langue = explode(',', $_SERVER['HTTP_ACCEPT_LANGUAGE']);
    $language = strtolower(substr(chop($langue[0]), 0, 2));
}
if ($language === 'fr') {
    $l_title = 'Sécurité';
    $l_spoofing = "Adresse(s) MAC usurpée(s) (Watchdog)";
    $l_virus = "Virus bloqué(s) (CLAMAV)";
    $l_fail2ban = "Adresse(s) IP bloquée(s) (Fail2Ban)";
    $l_ipAddress="Adresse IP";
    $l_user = "L'utilisateur";
    $l_empty="Vide";
    $l_rule="Règle";
} else {
    $l_title = 'Security';
    $l_spoofing = "MAC address spoofed (Watchdog)";
    $l_virus = "Virus blocked (CLAMAV)";
    $l_fail2ban = "IP address blocked (Fail2Ban)";
    $l_ipAddress="IP address";
    $l_user = "User";
    $l_empty="Empty";
    $l_rule="Rule";
}
$tab = (isset($_GET['tab'])) ? intval($_GET['tab']) : 1;
?>
<!DOCTYPE HTML>
<html>
        <head>
                <meta charset="UTF-8">
                <title><?= $l_title ?></title>
                <link rel="stylesheet" href="/css/bootstrap.min.css">
                <script src="/js/jquery.min.js"></script>
                <script src="/js/bootstrap.min.js"></script>
                <link rel="stylesheet" href="/css/acc.css">
        </head>
        <body>
                <div class="panel">
                        <div class="panel-header"><?= $l_title ?></div>
                        <div class="panel-row">
                                <div class="btn-group btn-group-justified" role="group" aria-label="Justified button group"> 
                                        <a href="security.php?tab=1" class="btn btn-default<?= (($tab === 1) ? ' active' : '') ?>" role="button"><?= $l_spoofing ?></a>
                                        <a href="security.php?tab=2" class="btn btn-default<?= (($tab === 2) ? ' active' : '') ?>" role="button"><?= $l_virus ?></a>
                                        <a href="security.php?tab=3" class="btn btn-default<?= (($tab === 3) ? ' active' : '') ?>" role="button"><?= $l_fail2ban ?></a>
                                </div>
<?php
if ($tab === 1) {
        $spoofs = [];
        $regex = '/^\[(?P<date>[0-9\/\-: ]+)\] : alcasar-watchdog : (?P<ip>(?:(?:[0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\.){3}(?:[0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])) is usurped \((?P<mac>(?:[0-9A-Fa-f]{2}[:-]){5}[0-9A-Fa-f]{2})\)\. Alcasar disconnect the user \((?P<user>.+)\)\.$/';
        $file = fopen('/var/Save/security/watchdog.log', 'r');
        if ($file) {
                while (!feof($file)) {
                        $line = fgets($file);

                        if (preg_match($regex, $line, $matches)) {
                                if (preg_match('/[0-9]{2}\/[0-9]{2}\/[0-9]{4}-[0-9]{2}:[0-9]{2}:[0-9]{2}/', $matches['date'], $matches_date)) {
                                        $matches['date'] = DateTime::createFromFormat('d/m/Y-H:i:s', $matches['date'])->format('Y-m-d H:i:s');
                                }
                                $spoofs[] = (object) [
                                        'date' => $matches['date'],
                                        'ip'   => $matches['ip'],
                                        'mac'  => $matches['mac'],
                                        'user' => $matches['user']
                                ];
                        }
                }
                fclose($file);
        }
        $spoofs = array_reverse($spoofs);
?>
                        <h3><?= $l_spoofing ?></h3>
                        <div class="container">
                                <table class="table table-striped table-hover" border="1">
                                <tr>
                                        <th>
                                                Date
                                        </th>
                                        <th>
                                                <?= $l_ipAddress ?>     
                                        </th>
                                        <th>
                                                MAC
                                        </th>
                                        <th>
                                                <?= $l_user ?>
                                        </th>
                                </tr>
                                <tbody>
                                        <?php if (!empty($spoofs)): ?>
                                        <?php foreach ($spoofs as $spoof): ?>
                                        <tr><td><?= $spoof->date ?></td><td><?= $spoof->ip ?></td><td><?= $spoof->mac ?></td><td><?= $spoof->user ?></td></tr>
                                        <?php endforeach; ?>
                                        <?php else: ?>
                                        <tr><td colspan="4" style="text-align: center;"><?= $l_empty ?></td></tr>
                                        <?php endif; ?>
                                </tbody>
                                </table>
                        </div>
<?php
} else if ($tab === 2) {
        $filePath = '/var/log/clamav/clamd.log';
        $pattern = "/\bfound\b/i";
        $lines = preg_grep ($pattern, file($filePath));
        if ($lines === false) {
                exit("Cannot open '$filePath'.");
        }
        $lines = array_reverse($lines);
?>
        <h3><?= $l_virus ?></h3>
        <div class="container">
                <table class="table table-striped table-hover">
                        <tbody>
                                <?php if (!empty($lines)): ?>
                                        <?php foreach ($lines as $line): ?>
                                                <tr><td><?= $line ?></td></tr>
                                        <?php endforeach; ?>
                                <?php else: ?>
                                        <tr><td style="text-align: center;"><?= $l_empty ?></td></tr>
                                <?php endif; ?>
                        </tbody>
                </table>
        </div>
<?php
} else if ($tab === 3) {
        $bans = [];
        $regex = '/^(?P<date>[0-9]{4}-[0-9]{2}-[0-9]{2}\ [0-9]{2}:[0-9]{2}:[0-9]{2}),[0-9]{3} fail2ban\.actions\[[0-9]+\]: WARNING \[(?P<rule>[a-zA-Z0-9_-]+)\] (?P<type>Ban|Unban) (?P<ip>[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3})$/';
        $file = fopen('/var/log/fail2ban.log', 'r');
        if ($file) {
                while (!feof($file)) {
                        $line = fgets($file);

                        if (preg_match($regex, $line, $matches)) {
                                if ($matches['type'] === 'Ban') {
                                        $bans[] = (object) [
                                                'date_ban'   => $matches['date'],
                                                'date_unban' => null,
                                                'rule'       => $matches['rule'],
                                                'ip'         => $matches['ip']
                                        ];
                                } else if ($matches['type'] === 'Unban') {
                                        foreach (array_reverse($bans) as $ban) {
                                                if (($ban->ip === $matches['ip']) && ($ban->rule === $matches['rule']) && ($ban->date_unban === null)) {
                                                        $ban->date_unban = $matches['date'];
                                                        break;
                                                }
                                        }
                                }
                        }
                }
                fclose($file);
        }
        $bans = array_reverse($bans);
?>
        <h3><?= $l_fail2ban ?></h3>
        <div class="container" border="1">
                <table  class="table table-striped table-hover" border="1">
                                <tr >
                                        <th>
                                                Date
                                        </th>
                                        <th>
                                                Date Unban
                                        </th>
                                        <th>
                                                <?= $l_rule ?>
                                        </th>
                                        <th>
                                                <?= $l_ipAddress ?>
                                        </th>
                                </tr>
                                <?php if (!empty($bans)): ?>
                                        <?php foreach ($bans as $ban): ?>
                                                <tr>
                                                        <td>
                                                                <?= $ban->date_ban ?>
                                                        </td>
                                                        <td>
                                                                <?= $ban->date_unban ?>
                                                        </td>
                                                        <td>
                                                                <?= $ban->rule ?>
                                                        </td>
                                                        <td>
                                                                <?= $ban->ip ?>
                                                        </td>
                                                </tr>
                                        <?php endforeach; ?>
                                <?php else: ?>
                                        <tr><td colspan="4" style="text-align: center;"><?= $l_empty ?></td></tr>
                                <?php endif; ?>
                </table>
        </div>
<?php
} else {
        echo 'Unknown tab';
}
?>
        </div>
</div>
</body>
</html>