How to check if a site visitor is using the Onion network?

Question

Information Security

Where can I get fresh lists of onion-relays?

Answer 1

Here is a working example

function isTorUser($ip)
{
    $list = getTorExitList();

    if (arrayBinarySearch($ip, $list) !== false) {
        return true;
    } else {
        return false;
    }
}

function getTorExitList()
{
    $path = __DIR__ . '/tor-list.cache';

    if ( file_exists($path) && time() - filemtime($path) < 600 ) {
        $list = include $path;
        if ($list && is_array($list)) {
            return $list;
        }
    }

    $data = file('https://openinternet.io/tor/tor-node-list.txt');
    if (!$data) {
        return array();
    }

    $list = array();

    foreach($data as $line) {
        $line = trim($line);
        if ($line == '' || $line[0] == '#') continue;

        list($nick, $ip) = explode("\t", $line);
        $list[] = $ip;
    }

    sort($list);

    file_put_contents($path, sprintf("<?php return %s;", var_export($list, true)));

    return $list;
}

function arrayBinarySearch($needle, $haystack)
{
    $high = count($haystack);
    $low = 0;

    while ($high - $low > 1){
        $probe = ($high + $low) / 2;
        if ($haystack[$probe] < $needle){
            $low = $probe;
        } else{
            $high = $probe;
        }
    }

    if ($high == count($haystack) || $haystack[$high] != $needle) {
        return false;
    } else {
        return $high;
    }
}

$isTorUser = isTorUser($_SERVER['REMOTE_ADDR']);

if ($isTorUser) {
    Die("Извините, но Вы не можете пользоваться нашим сайтом из сети TOR!!!");
}

Answer 2

https://gist.github.com/jeroenvisser101/cb7e01f58b...
I don't know if this option still works, it worked before.