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anti-bot.php: format

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This commit is contained in:
Zankaria 2024-09-19 23:09:02 +02:00
parent bd5c2c61b9
commit 0e8aeca4af
1 changed files with 33 additions and 23 deletions
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56
inc/anti-bot.php
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@ -6,26 +6,31 @@
defined('TINYBOARD') or exit;
$hidden_inputs_twig = array();
$hidden_inputs_twig = [];
class AntiBot {
public $salt, $inputs = array(), $index = 0;
public $salt;
public $inputs = [];
public $index = 0;
public static function randomString($length, $uppercase = false, $special_chars = false, $unicode_chars = false) {
$chars = 'abcdefghijklmnopqrstuvwxyz0123456789';
if ($uppercase)
if ($uppercase) {
$chars .= 'ABCDEFGHIJKLMNOPQRSTUVWXYZ';
if ($special_chars)
}
if ($special_chars) {
$chars .= ' ~!@#$%^&*()_+,./;\'[]\\{}|:<>?=-` ';
}
if ($unicode_chars) {
$len = strlen($chars) / 10;
for ($n = 0; $n < $len; $n++)
for ($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();
$ch = [];
// fill up $ch until we reach $length
while (count($ch) < $length) {
@ -36,8 +41,9 @@ class AntiBot {
break;
}
shuffle($keys);
foreach ($keys as $key)
foreach ($keys as $key) {
$ch[] = $chars[$key];
}
}
$chars = $ch;
@ -49,20 +55,21 @@ class AntiBot {
$chars = preg_split('//u', $string, -1, PREG_SPLIT_NO_EMPTY);
foreach ($chars as &$c) {
if (mt_rand(0, 3) != 0)
if (mt_rand(0, 3) != 0) {
$c = utf8tohtml($c);
else
$c = mb_encode_numericentity($c, array(0, 0xffff, 0, 0xffff), 'UTF-8');
} else {
$c = mb_encode_numericentity($c, [ 0, 0xffff, 0, 0xffff ], 'UTF-8');
}
}
return implode('', $chars);
}
public function __construct(array $salt = array()) {
public function __construct(array $salt = []) {
global $config;
if (!empty($salt)) {
// create a salted hash of the "extra salt"
// Create a salted hash of the "extra salt"
$this->salt = implode(':', $salt);
} else {
$this->salt = '';
@ -80,8 +87,9 @@ class AntiBot {
} else {
// Use a pre-defined confusing name
$name = $config['spam']['hidden_input_names'][$hidden_input_names_x++];
if ($hidden_input_names_x >= count($config['spam']['hidden_input_names']))
if ($hidden_input_names_x >= count($config['spam']['hidden_input_names'])) {
$hidden_input_names_x = false;
}
}
if (mt_rand(0, 2) == 0) {
@ -98,15 +106,14 @@ class AntiBot {
}
public static function space() {
if (mt_rand(0, 3) != 0)
if (mt_rand(0, 3) != 0) {
return ' ';
}
return str_repeat(' ', mt_rand(1, 3));
}
public function html($count = false) {
global $config;
$elements = array(
$elements = [
'<input type="hidden" name="%name%" value="%value%">',
'<input type="hidden" value="%value%" name="%name%">',
'<input name="%name%" value="%value%" type="hidden">',
@ -118,7 +125,7 @@ class AntiBot {
'<div style="display:none"><input type="text" name="%name%" value="%value%"></div>',
'<textarea style="display:none" name="%name%">%value%</textarea>',
'<textarea name="%name%" style="display:none">%value%</textarea>'
);
];
$html = '';
@ -127,7 +134,7 @@ class AntiBot {
}
if ($count === true) {
// all elements
// All elements
$inputs = array_slice($this->inputs, $this->index);
} else {
$inputs = array_slice($this->inputs, $this->index, $count);
@ -139,8 +146,9 @@ class AntiBot {
while (!$element) {
$element = $elements[array_rand($elements)];
$element = str_replace(' ', self::space(), $element);
if (mt_rand(0, 5) == 0)
if (mt_rand(0, 5) == 0) {
$element = str_replace('>', self::space() . '>', $element);
}
if (strpos($element, 'textarea') !== false && $value == '') {
// There have been some issues with mobile web browsers and empty <textarea>'s.
$element = false;
@ -149,13 +157,15 @@ class AntiBot {
$element = str_replace('%name%', utf8tohtml($name), $element);
if (mt_rand(0, 2) == 0)
if (mt_rand(0, 2) == 0) {
$value = $this->make_confusing($value);
else
} else {
$value = utf8tohtml($value);
}
if (strpos($element, 'textarea') === false)
if (strpos($element, 'textarea') === false) {
$value = str_replace('"', '&quot;', $value);
}
$element = str_replace('%value%', $value, $element);