Autoformat (vim) anti-bot.php to use spaces instead of tabs and spaces
This commit is contained in:
parent
54020351c5
commit
027d74c5dc
586
inc/anti-bot.php
586
inc/anti-bot.php
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@ -11,347 +11,347 @@ $hidden_inputs_twig = array();
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$logfile = "/tmp/lainchan_err.out";
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function print_err($s) {
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global $logfile;
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$datetime = new Datetime();
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file_put_contents(
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$logfile,
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$datetime->format(DateTime::ATOM) . " " . $s . "\n",
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FILE_APPEND
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);
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global $logfile;
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$datetime = new Datetime();
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file_put_contents(
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$logfile,
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$datetime->format(DateTime::ATOM) . " " . $s . "\n",
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FILE_APPEND
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);
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}
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function getStackTraceAsString() {
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$stackTrace = debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS);
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$stackTrace = debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS);
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$traceString = '';
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foreach ($stackTrace as $index => $entry) {
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if ($index > 0) {
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$traceString .= sprintf(
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"#%d %s(%d): %s%s",
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$index - 1,
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isset($entry['file']) ? $entry['file'] : 'unknown',
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isset($entry['line']) ? $entry['line'] : 0,
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isset($entry['class']) ? $entry['class'] . $entry['type'] . $entry['function'] : $entry['function'],
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PHP_EOL
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);
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}
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$traceString = '';
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foreach ($stackTrace as $index => $entry) {
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if ($index > 0) {
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$traceString .= sprintf(
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"#%d %s(%d): %s%s",
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$index - 1,
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isset($entry['file']) ? $entry['file'] : 'unknown',
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isset($entry['line']) ? $entry['line'] : 0,
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isset($entry['class']) ? $entry['class'] . $entry['type'] . $entry['function'] : $entry['function'],
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PHP_EOL
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);
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}
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}
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return $traceString;
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return $traceString;
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}
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// print_err("\n\nSTART\n\n");
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class AntiBot {
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public $salt, $inputs = array(), $index = 0;
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public static function randomString($length, $uppercase = false, $special_chars = false, $unicode_chars = false) {
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$chars = 'abcdefghijklmnopqrstuvwxyz0123456789';
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if ($uppercase)
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$chars .= 'ABCDEFGHIJKLMNOPQRSTUVWXYZ';
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if ($special_chars)
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$chars .= ' ~!@#$%^&*()_+,./;\'[]\\{}|:<>?=-` ';
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if ($unicode_chars) {
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$len = strlen($chars) / 10;
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for ($n = 0; $n < $len; $n++)
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$chars .= mb_convert_encoding('&#' . mt_rand(0x2600, 0x26FF) . ';', 'UTF-8', 'HTML-ENTITIES');
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}
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$chars = preg_split('//u', $chars, -1, PREG_SPLIT_NO_EMPTY);
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$ch = array();
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// fill up $ch until we reach $length
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while (count($ch) < $length) {
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$n = $length - count($ch);
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$keys = array_rand($chars, $n > count($chars) ? count($chars) : $n);
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if ($n == 1) {
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$ch[] = $chars[$keys];
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break;
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}
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shuffle($keys);
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foreach ($keys as $key)
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$ch[] = $chars[$key];
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}
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$chars = $ch;
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return implode('', $chars);
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}
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public static function make_confusing($string) {
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$chars = preg_split('//u', $string, -1, PREG_SPLIT_NO_EMPTY);
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foreach ($chars as &$c) {
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if (mt_rand(0, 3) != 0)
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$c = utf8tohtml($c);
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else
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$c = mb_encode_numericentity($c, array(0, 0xffff, 0, 0xffff), 'UTF-8');
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}
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return implode('', $chars);
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}
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public function __construct(array $salt = array()) {
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global $config;
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if (!empty($salt)) {
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// create a salted hash of the "extra salt"
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$this->salt = implode(':', $salt);
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} else {
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$this->salt = '';
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}
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shuffle($config['spam']['hidden_input_names']);
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$input_count = mt_rand($config['spam']['hidden_inputs_min'], $config['spam']['hidden_inputs_max']);
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$hidden_input_names_x = 0;
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for ($x = 0; $x < $input_count ; $x++) {
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if ($hidden_input_names_x === false || mt_rand(0, 2) == 0) {
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// Use an obscure name
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$name = $this->randomString(mt_rand(10, 40), false, false, $config['spam']['unicode']);
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} else {
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// Use a pre-defined confusing name
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$name = $config['spam']['hidden_input_names'][$hidden_input_names_x++];
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if ($hidden_input_names_x >= count($config['spam']['hidden_input_names']))
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$hidden_input_names_x = false;
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}
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if (mt_rand(0, 2) == 0) {
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// Value must be null
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$this->inputs[$name] = '';
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} elseif (mt_rand(0, 4) == 0) {
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// Numeric value
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$this->inputs[$name] = (string)mt_rand(0, 100000);
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} else {
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// Obscure value
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$this->inputs[$name] = $this->randomString(mt_rand(5, 100), true, true, $config['spam']['unicode']);
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}
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}
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}
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public static function space() {
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if (mt_rand(0, 3) != 0)
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return ' ';
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return str_repeat(' ', mt_rand(1, 3));
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}
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public function html($count = false) {
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global $config;
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$elements = array(
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'<input type="hidden" name="%name%" value="%value%">',
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'<input type="hidden" value="%value%" name="%name%">',
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'<input name="%name%" value="%value%" type="hidden">',
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'<input value="%value%" name="%name%" type="hidden">',
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'<input style="display:none" type="text" name="%name%" value="%value%">',
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'<input style="display:none" type="text" value="%value%" name="%name%">',
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'<span style="display:none"><input type="text" name="%name%" value="%value%"></span>',
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'<div style="display:none"><input type="text" name="%name%" value="%value%"></div>',
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'<div style="display:none"><input type="text" name="%name%" value="%value%"></div>',
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'<textarea style="display:none" name="%name%">%value%</textarea>',
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'<textarea name="%name%" style="display:none">%value%</textarea>'
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);
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$html = '';
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if ($count === false) {
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$count = mt_rand(1, round(abs(count($this->inputs) / 15)) + 1);
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}
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if ($count === true) {
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// all elements
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$inputs = array_slice($this->inputs, $this->index);
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} else {
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$inputs = array_slice($this->inputs, $this->index, $count);
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}
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$this->index += count($inputs);
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foreach ($inputs as $name => $value) {
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$element = false;
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while (!$element) {
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$element = $elements[array_rand($elements)];
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$element = str_replace(' ', self::space(), $element);
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if (mt_rand(0, 5) == 0)
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$element = str_replace('>', self::space() . '>', $element);
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if (strpos($element, 'textarea') !== false && $value == '') {
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// There have been some issues with mobile web browsers and empty <textarea>'s.
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$element = false;
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}
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}
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$element = str_replace('%name%', utf8tohtml($name), $element);
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if (mt_rand(0, 2) == 0)
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$value = $this->make_confusing($value);
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else
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$value = utf8tohtml($value);
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if (strpos($element, 'textarea') === false)
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$value = str_replace('"', '"', $value);
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$element = str_replace('%value%', $value, $element);
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$html .= $element;
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}
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return $html;
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}
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public function reset() {
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$this->index = 0;
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}
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public function hash() {
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global $config;
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public $salt, $inputs = array(), $index = 0;
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// This is the tricky part: create a hash to validate it after
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// First, sort the keys in alphabetical order (A-Z)
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$inputs = $this->inputs;
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ksort($inputs);
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$hash = '';
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// Iterate through each input
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foreach ($inputs as $name => $value) {
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$hash .= $name . '=' . $value;
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}
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// Add a salt to the hash
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$hash .= $config['cookies']['salt'];
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// Use SHA1 for the hash
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return sha1($hash . $this->salt);
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}
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public function printErrVars() { //DELETE ME
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$inputs = $this->inputs;
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ksort($inputs);
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print_err("Antibot " . $this->hash() . " inputs: " . json_encode($inputs));
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public static function randomString($length, $uppercase = false, $special_chars = false, $unicode_chars = false) {
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$chars = 'abcdefghijklmnopqrstuvwxyz0123456789';
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if ($uppercase)
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$chars .= 'ABCDEFGHIJKLMNOPQRSTUVWXYZ';
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if ($special_chars)
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$chars .= ' ~!@#$%^&*()_+,./;\'[]\\{}|:<>?=-` ';
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if ($unicode_chars) {
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$len = strlen($chars) / 10;
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for ($n = 0; $n < $len; $n++)
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$chars .= mb_convert_encoding('&#' . mt_rand(0x2600, 0x26FF) . ';', 'UTF-8', 'HTML-ENTITIES');
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}
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$chars = preg_split('//u', $chars, -1, PREG_SPLIT_NO_EMPTY);
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$ch = array();
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// fill up $ch until we reach $length
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while (count($ch) < $length) {
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$n = $length - count($ch);
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$keys = array_rand($chars, $n > count($chars) ? count($chars) : $n);
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if ($n == 1) {
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$ch[] = $chars[$keys];
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break;
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}
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shuffle($keys);
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foreach ($keys as $key)
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$ch[] = $chars[$key];
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}
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$chars = $ch;
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return implode('', $chars);
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}
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public static function make_confusing($string) {
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$chars = preg_split('//u', $string, -1, PREG_SPLIT_NO_EMPTY);
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foreach ($chars as &$c) {
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if (mt_rand(0, 3) != 0)
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$c = utf8tohtml($c);
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else
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$c = mb_encode_numericentity($c, array(0, 0xffff, 0, 0xffff), 'UTF-8');
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}
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return implode('', $chars);
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}
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public function __construct(array $salt = array()) {
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global $config;
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if (!empty($salt)) {
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// create a salted hash of the "extra salt"
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$this->salt = implode(':', $salt);
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} else {
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$this->salt = '';
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}
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shuffle($config['spam']['hidden_input_names']);
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$input_count = mt_rand($config['spam']['hidden_inputs_min'], $config['spam']['hidden_inputs_max']);
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$hidden_input_names_x = 0;
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for ($x = 0; $x < $input_count ; $x++) {
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if ($hidden_input_names_x === false || mt_rand(0, 2) == 0) {
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// Use an obscure name
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$name = $this->randomString(mt_rand(10, 40), false, false, $config['spam']['unicode']);
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} else {
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// Use a pre-defined confusing name
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$name = $config['spam']['hidden_input_names'][$hidden_input_names_x++];
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if ($hidden_input_names_x >= count($config['spam']['hidden_input_names']))
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$hidden_input_names_x = false;
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}
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if (mt_rand(0, 2) == 0) {
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// Value must be null
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$this->inputs[$name] = '';
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} elseif (mt_rand(0, 4) == 0) {
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// Numeric value
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$this->inputs[$name] = (string)mt_rand(0, 100000);
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} else {
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// Obscure value
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$this->inputs[$name] = $this->randomString(mt_rand(5, 100), true, true, $config['spam']['unicode']);
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}
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}
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}
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public static function space() {
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if (mt_rand(0, 3) != 0)
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return ' ';
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return str_repeat(' ', mt_rand(1, 3));
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}
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public function html($count = false) {
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global $config;
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$elements = array(
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'<input type="hidden" name="%name%" value="%value%">',
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'<input type="hidden" value="%value%" name="%name%">',
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'<input name="%name%" value="%value%" type="hidden">',
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'<input value="%value%" name="%name%" type="hidden">',
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'<input style="display:none" type="text" name="%name%" value="%value%">',
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'<input style="display:none" type="text" value="%value%" name="%name%">',
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'<span style="display:none"><input type="text" name="%name%" value="%value%"></span>',
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'<div style="display:none"><input type="text" name="%name%" value="%value%"></div>',
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'<div style="display:none"><input type="text" name="%name%" value="%value%"></div>',
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'<textarea style="display:none" name="%name%">%value%</textarea>',
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'<textarea name="%name%" style="display:none">%value%</textarea>'
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);
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$html = '';
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if ($count === false) {
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$count = mt_rand(1, round(abs(count($this->inputs) / 15)) + 1);
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}
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if ($count === true) {
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// all elements
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$inputs = array_slice($this->inputs, $this->index);
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} else {
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$inputs = array_slice($this->inputs, $this->index, $count);
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}
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$this->index += count($inputs);
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foreach ($inputs as $name => $value) {
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$element = false;
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while (!$element) {
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$element = $elements[array_rand($elements)];
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$element = str_replace(' ', self::space(), $element);
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if (mt_rand(0, 5) == 0)
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$element = str_replace('>', self::space() . '>', $element);
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if (strpos($element, 'textarea') !== false && $value == '') {
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// There have been some issues with mobile web browsers and empty <textarea>'s.
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$element = false;
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}
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}
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$element = str_replace('%name%', utf8tohtml($name), $element);
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if (mt_rand(0, 2) == 0)
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$value = $this->make_confusing($value);
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else
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$value = utf8tohtml($value);
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if (strpos($element, 'textarea') === false)
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$value = str_replace('"', '"', $value);
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$element = str_replace('%value%', $value, $element);
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$html .= $element;
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}
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return $html;
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}
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public function reset() {
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$this->index = 0;
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}
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public function hash() {
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global $config;
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// This is the tricky part: create a hash to validate it after
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// First, sort the keys in alphabetical order (A-Z)
|
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$inputs = $this->inputs;
|
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ksort($inputs);
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|
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$hash = '';
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// Iterate through each input
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foreach ($inputs as $name => $value) {
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$hash .= $name . '=' . $value;
|
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}
|
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// Add a salt to the hash
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$hash .= $config['cookies']['salt'];
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// Use SHA1 for the hash
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return sha1($hash . $this->salt);
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}
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public function printErrVars() { //DELETE ME
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$inputs = $this->inputs;
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ksort($inputs);
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print_err("Antibot " . $this->hash() . " inputs: " . json_encode($inputs));
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}
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}
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function _create_antibot($board, $thread) {
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global $config, $purged_old_antispam;
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$antibot = new AntiBot(array($board, $thread));
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if (!isset($purged_old_antispam)) {
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$purged_old_antispam = true;
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query('DELETE FROM ``antispam`` WHERE `expires` < UNIX_TIMESTAMP()') or error(db_error());
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}
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if ($thread)
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$query = prepare('UPDATE ``antispam`` SET `expires` = UNIX_TIMESTAMP() + :expires WHERE `board` = :board AND `thread` = :thread AND `expires` IS NULL');
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else
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$query = prepare('UPDATE ``antispam`` SET `expires` = UNIX_TIMESTAMP() + :expires WHERE `board` = :board AND `thread` IS NULL AND `expires` IS NULL');
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$query->bindValue(':board', $board);
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if ($thread)
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$query->bindValue(':thread', $thread);
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$query->bindValue(':expires', $config['spam']['hidden_inputs_expire']);
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$query->execute() or error(db_error($query));
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$query = prepare('INSERT INTO ``antispam`` VALUES (:board, :thread, :hash, UNIX_TIMESTAMP(), NULL, 0)');
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$query->bindValue(':board', $board);
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$query->bindValue(':thread', $thread);
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$query->bindValue(':hash', $antibot->hash());
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$query->execute() or error(db_error($query));
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global $config, $purged_old_antispam;
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$antibot->printErrVars();
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return $antibot;
|
||||
$antibot = new AntiBot(array($board, $thread));
|
||||
|
||||
if (!isset($purged_old_antispam)) {
|
||||
$purged_old_antispam = true;
|
||||
query('DELETE FROM ``antispam`` WHERE `expires` < UNIX_TIMESTAMP()') or error(db_error());
|
||||
}
|
||||
|
||||
if ($thread)
|
||||
$query = prepare('UPDATE ``antispam`` SET `expires` = UNIX_TIMESTAMP() + :expires WHERE `board` = :board AND `thread` = :thread AND `expires` IS NULL');
|
||||
else
|
||||
$query = prepare('UPDATE ``antispam`` SET `expires` = UNIX_TIMESTAMP() + :expires WHERE `board` = :board AND `thread` IS NULL AND `expires` IS NULL');
|
||||
|
||||
$query->bindValue(':board', $board);
|
||||
if ($thread)
|
||||
$query->bindValue(':thread', $thread);
|
||||
$query->bindValue(':expires', $config['spam']['hidden_inputs_expire']);
|
||||
$query->execute() or error(db_error($query));
|
||||
|
||||
$query = prepare('INSERT INTO ``antispam`` VALUES (:board, :thread, :hash, UNIX_TIMESTAMP(), NULL, 0)');
|
||||
$query->bindValue(':board', $board);
|
||||
$query->bindValue(':thread', $thread);
|
||||
$query->bindValue(':hash', $antibot->hash());
|
||||
$query->execute() or error(db_error($query));
|
||||
|
||||
$antibot->printErrVars();
|
||||
|
||||
return $antibot;
|
||||
}
|
||||
|
||||
function dumpVars($extra_salt) {
|
||||
global $config;
|
||||
global $config;
|
||||
|
||||
print_err("Check Spam POST data: " . json_encode($_POST));
|
||||
print_err("Check Spam POST data: " . json_encode($_POST));
|
||||
|
||||
/*
|
||||
foreach ($_POST as $name => $value) {
|
||||
foreach ($_POST as $name => $value) {
|
||||
$is_valid_input = in_array($name, $config['spam']['valid_inputs']) ? "valid" : "invalid";
|
||||
print_err(" $name: $value ($is_valid_input)");
|
||||
}
|
||||
*/
|
||||
|
||||
if (!empty($extra_salt)) {
|
||||
$extra_salt = implode(':', $extra_salt);
|
||||
} else {
|
||||
$extra_salt = '';
|
||||
}
|
||||
if (!empty($extra_salt)) {
|
||||
$extra_salt = implode(':', $extra_salt);
|
||||
} else {
|
||||
$extra_salt = '';
|
||||
}
|
||||
|
||||
print_err("extra_salt: $extra_salt");
|
||||
print_err("extra_salt: $extra_salt");
|
||||
}
|
||||
|
||||
function checkSpam(array $extra_salt = array()) {
|
||||
global $config, $pdo;
|
||||
global $config, $pdo;
|
||||
|
||||
#print_err("checkSpam start");
|
||||
$extra_salt_orig = $extra_salt;
|
||||
#print_err("checkSpam start");
|
||||
$extra_salt_orig = $extra_salt;
|
||||
|
||||
if (!isset($_POST['hash'])) {
|
||||
print_err("checkSpam: _POST array doesn't have key 'hash', check failed.");
|
||||
dumpVars($extra_salt_orig);
|
||||
return true;
|
||||
}
|
||||
if (!isset($_POST['hash'])) {
|
||||
print_err("checkSpam: _POST array doesn't have key 'hash', check failed.");
|
||||
dumpVars($extra_salt_orig);
|
||||
return true;
|
||||
}
|
||||
|
||||
$hash = $_POST['hash'];
|
||||
$hash = $_POST['hash'];
|
||||
|
||||
if (!empty($extra_salt)) {
|
||||
// create a salted hash of the "extra salt"
|
||||
$extra_salt = implode(':', $extra_salt);
|
||||
} else {
|
||||
$extra_salt = '';
|
||||
}
|
||||
if (!empty($extra_salt)) {
|
||||
// create a salted hash of the "extra salt"
|
||||
$extra_salt = implode(':', $extra_salt);
|
||||
} else {
|
||||
$extra_salt = '';
|
||||
}
|
||||
|
||||
// Reconsturct the $inputs array
|
||||
$inputs = array();
|
||||
// Reconsturct the $inputs array
|
||||
$inputs = array();
|
||||
|
||||
foreach ($_POST as $name => $value) {
|
||||
if (in_array($name, $config['spam']['valid_inputs']))
|
||||
continue;
|
||||
foreach ($_POST as $name => $value) {
|
||||
if (in_array($name, $config['spam']['valid_inputs']))
|
||||
continue;
|
||||
|
||||
$inputs[$name] = $value;
|
||||
}
|
||||
$inputs[$name] = $value;
|
||||
}
|
||||
|
||||
// Sort the inputs in alphabetical order (A-Z)
|
||||
ksort($inputs);
|
||||
// Sort the inputs in alphabetical order (A-Z)
|
||||
ksort($inputs);
|
||||
|
||||
$_hash = '';
|
||||
$_hash = '';
|
||||
|
||||
// Iterate through each input
|
||||
foreach ($inputs as $name => $value) {
|
||||
$_hash .= $name . '=' . $value;
|
||||
}
|
||||
// Iterate through each input
|
||||
foreach ($inputs as $name => $value) {
|
||||
$_hash .= $name . '=' . $value;
|
||||
}
|
||||
|
||||
// Add a salt to the hash
|
||||
$_hash .= $config['cookies']['salt'];
|
||||
// Add a salt to the hash
|
||||
$_hash .= $config['cookies']['salt'];
|
||||
|
||||
// Use SHA1 for the hash
|
||||
$_hash = sha1($_hash . $extra_salt);
|
||||
// Use SHA1 for the hash
|
||||
$_hash = sha1($_hash . $extra_salt);
|
||||
|
||||
if ($hash != $_hash) {
|
||||
print_err("checkSpam: Hash values do not match! submitted hash value from POST data: $hash ; Computed hash value: $_hash");
|
||||
dumpVars($extra_salt_orig);
|
||||
return true;
|
||||
}
|
||||
if ($hash != $_hash) {
|
||||
print_err("checkSpam: Hash values do not match! submitted hash value from POST data: $hash ; Computed hash value: $_hash");
|
||||
dumpVars($extra_salt_orig);
|
||||
return true;
|
||||
}
|
||||
|
||||
$query = prepare('SELECT `passed` FROM ``antispam`` WHERE `hash` = :hash');
|
||||
$query->bindValue(':hash', $hash);
|
||||
$query->execute() or error(db_error($query));
|
||||
if ((($passed = $query->fetchColumn(0)) === false) || ($passed > $config['spam']['hidden_inputs_max_pass'])) {
|
||||
// there was no database entry for this hash. most likely expired.
|
||||
print_err("checkSpam: there was no database entry for this hash. most likely expired. $hash");
|
||||
dumpVars($extra_salt_orig);
|
||||
return true;
|
||||
}
|
||||
$query = prepare('SELECT `passed` FROM ``antispam`` WHERE `hash` = :hash');
|
||||
$query->bindValue(':hash', $hash);
|
||||
$query->execute() or error(db_error($query));
|
||||
if ((($passed = $query->fetchColumn(0)) === false) || ($passed > $config['spam']['hidden_inputs_max_pass'])) {
|
||||
// there was no database entry for this hash. most likely expired.
|
||||
print_err("checkSpam: there was no database entry for this hash. most likely expired. $hash");
|
||||
dumpVars($extra_salt_orig);
|
||||
return true;
|
||||
}
|
||||
|
||||
return $hash;
|
||||
return $hash;
|
||||
}
|
||||
|
||||
function incrementSpamHash($hash) {
|
||||
$query = prepare('UPDATE ``antispam`` SET `passed` = `passed` + 1 WHERE `hash` = :hash');
|
||||
$query->bindValue(':hash', $hash);
|
||||
$query->execute() or error(db_error($query));
|
||||
$query = prepare('UPDATE ``antispam`` SET `passed` = `passed` + 1 WHERE `hash` = :hash');
|
||||
$query->bindValue(':hash', $hash);
|
||||
$query->execute() or error(db_error($query));
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in New Issue