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Merge pull request #809 from vichan-devel/howwwwww

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revert trimming and this somehow fixes the antibot issues??????
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Lorenzo Yario 2024-09-19 01:28:18 -07:00 committed by GitHub
commit ccfcd03c95
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1 changed files with 35 additions and 35 deletions
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70
inc/anti-bot.php
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@ -10,7 +10,7 @@ $hidden_inputs_twig = array();
class AntiBot {
public $salt, $inputs = array(), $index = 0;
public static function randomString($length, $uppercase = false, $special_chars = false, $unicode_chars = false) {
$chars = 'abcdefghijklmnopqrstuvwxyz0123456789';
if ($uppercase)
@ -22,11 +22,11 @@ class AntiBot {
for ($n = 0; $n < $len; $n++)
$chars .= mb_convert_encoding('&#' . mt_rand(0x2600, 0x26FF) . ';', 'UTF-8', 'HTML-ENTITIES');
}
$chars = preg_split('//u', $chars, -1, PREG_SPLIT_NO_EMPTY);
$ch = array();
// fill up $ch until we reach $length
while (count($ch) < $length) {
$n = $length - count($ch);
@ -39,40 +39,40 @@ class AntiBot {
foreach ($keys as $key)
$ch[] = $chars[$key];
}
$chars = $ch;
return implode('', $chars);
}
public static function make_confusing($string) {
$chars = preg_split('//u', $string, -1, PREG_SPLIT_NO_EMPTY);
foreach ($chars as &$c) {
if (mt_rand(0, 3) != 0)
$c = utf8tohtml($c);
else
$c = mb_encode_numericentity($c, array(0, 0xffff, 0, 0xffff), 'UTF-8');
}
return implode('', $chars);
}
public function __construct(array $salt = array()) {
global $config;
if (!empty($salt)) {
// create a salted hash of the "extra salt"
$this->salt = implode(':', $salt);
} else {
} else {
$this->salt = '';
}
shuffle($config['spam']['hidden_input_names']);
$input_count = mt_rand($config['spam']['hidden_inputs_min'], $config['spam']['hidden_inputs_max']);
$hidden_input_names_x = 0;
for ($x = 0; $x < $input_count ; $x++) {
if ($hidden_input_names_x === false || mt_rand(0, 2) == 0) {
// Use an obscure name
@ -83,7 +83,7 @@ class AntiBot {
if ($hidden_input_names_x >= count($config['spam']['hidden_input_names']))
$hidden_input_names_x = false;
}
if (mt_rand(0, 2) == 0) {
// Value must be null
$this->inputs[$name] = '';
@ -96,16 +96,16 @@ class AntiBot {
}
}
}
public static function space() {
if (mt_rand(0, 3) != 0)
return ' ';
return str_repeat(' ', mt_rand(1, 3));
}
public function html($count = false) {
global $config;
$elements = array(
'<input type="hidden" name="%name%" value="%value%">',
'<input type="hidden" value="%value%" name="%name%">',
@ -119,13 +119,13 @@ class AntiBot {
'<textarea style="display:none" name="%name%">%value%</textarea>',
'<textarea name="%name%" style="display:none">%value%</textarea>'
);
$html = '';
if ($count === false) {
$count = mt_rand(1, (int)abs(count($this->inputs) / 15) + 1);
$count = mt_rand(1, abs(count($this->inputs) / 15) + 1);
}
if ($count === true) {
// all elements
$inputs = array_slice($this->inputs, $this->index);
@ -133,7 +133,7 @@ class AntiBot {
$inputs = array_slice($this->inputs, $this->index, $count);
}
$this->index += count($inputs);
foreach ($inputs as $name => $value) {
$element = false;
while (!$element) {
@ -146,37 +146,37 @@ class AntiBot {
$element = false;
}
}
$element = str_replace('%name%', utf8tohtml($name), $element);
if (mt_rand(0, 2) == 0)
$value = $this->make_confusing($value);
else
$value = utf8tohtml($value);
if (strpos($element, 'textarea') === false)
$value = str_replace('"', '&quot;', $value);
$element = str_replace('%value%', $value, $element);
$html .= $element;
}
return $html;
}
public function reset() {
$this->index = 0;
}
public function hash() {
global $config;
// This is the tricky part: create a hash to validate it after
// First, sort the keys in alphabetical order (A-Z)
$inputs = $this->inputs;
ksort($inputs);
$hash = '';
// Iterate through each input
foreach ($inputs as $name => $value) {
@ -184,7 +184,7 @@ class AntiBot {
}
// Add a salt to the hash
$hash .= $config['cookies']['salt'];
// Use SHA1 for the hash
return sha1($hash . $this->salt);
}