diff --git a/inc/anti-bot.php b/inc/anti-bot.php index 326628af..6f684c55 100644 --- a/inc/anti-bot.php +++ b/inc/anti-bot.php @@ -1,199 +1,5 @@ ?=-` '; - } - if ($unicode_chars) { - $len = strlen($chars) / 10; - 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 = []; - - // fill up $ch until we reach $length - while (count($ch) < $length) { - $n = $length - count($ch); - $keys = array_rand($chars, $n > count($chars) ? count($chars) : $n); - if ($n == 1) { - $ch[] = $chars[$keys]; - break; - } - shuffle($keys); - foreach ($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, [ 0, 0xffff, 0, 0xffff ], 'UTF-8'); - } - } - - return implode('', $chars); - } - - public function __construct(array $salt = []) { - global $config; - - if (!empty($salt)) { - // Create a salted hash of the "extra salt" - $this->salt = implode(':', $salt); - } 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 - $name = $this->randomString(mt_rand(10, 40), false, false, $config['spam']['unicode']); - } 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'])) { - $hidden_input_names_x = false; - } - } - - if (mt_rand(0, 2) == 0) { - // Value must be null - $this->inputs[$name] = ''; - } elseif (mt_rand(0, 4) == 0) { - // Numeric value - $this->inputs[$name] = (string)mt_rand(0, 100000); - } else { - // Obscure value - $this->inputs[$name] = $this->randomString(mt_rand(5, 100), true, true, $config['spam']['unicode']); - } - } - } - - public static function space() { - if (mt_rand(0, 3) != 0) { - return ' '; - } - return str_repeat(' ', mt_rand(1, 3)); - } - - public function html($count = false) { - $elements = [ - '', - '', - '', - '', - '', - '', - '', - '
', - '
', - '', - '' - ]; - - $html = ''; - - if ($count === false) { - $count = mt_rand(1, (int)abs(count($this->inputs) / 15) + 1); - } - - if ($count === true) { - // All elements - $inputs = array_slice($this->inputs, $this->index); - } else { - $inputs = array_slice($this->inputs, $this->index, $count); - } - $this->index += count($inputs); - - foreach ($inputs as $name => $value) { - $element = false; - while (!$element) { - $element = $elements[array_rand($elements)]; - $element = str_replace(' ', self::space(), $element); - 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