function task_captchapack($task)
{
global $db;
// Delete old captcha entries, those older than one hour
$cut = TIME_NOW - 60 * 60 * captchapack_gets_num('cleanupinterval', 1);
$db->delete_query("captcha_captchapack", "dateline < '{$cut}'");
}
/**
* Validation callback function.
*/
function captchapack_validate($reg)
{
global $mybb, $db, $lang;
// Quit if it's not enabled
if (!$mybb->settings['captchapack_enabled']) {
return;
}
// Load error messages
$lang->load('captchapack');
// Quit if the hash field is gone
if (empty($mybb->input['captchapack-hash'])) {
$reg->set_error($lang->captchapack_error_no_hash);
return;
}
// Quit if hash in invalid
if (!preg_match('/^[0-9a-f]{40}$/', $mybb->input['captchapack-hash'])) {
$reg->set_error($lang->captchapack_error_invalid_hash);
return;
}
// Validate
$hash = $mybb->input['captchapack-hash'];
if (isset($mybb->input['captchapack-answer']) && '' !== $mybb->input['captchapack-answer']) {
$answer = trim($mybb->input['captchapack-answer']);
// Filter out answers that don't follow the correct format to save one
// database query. Note this also means changing the CAPTCHA length
// invalidates existing CAPTCHAs.
$num = captchapack_gets_num('num', 5);
$type = $mybb->settings['captchapack_type'];
if (in_array($type, array('asciiart', 'css', 'route')) && !preg_match("/^\\w{{$num}}\$/", $answer)) {
$reg->set_error($lang->captchapack_error_invalid_fmt);
} else {
$result = captchapack_dbvalidate($hash, $answer);
if (!$result) {
$reg->set_error($lang->captchapack_error_invalid_ans);
} elseif (captchapack_gets_num('minresptime', 0) && $result > TIME_NOW - captchapack_gets_num('minresptime', 0)) {
$reg->set_error($lang->captchapack_error_too_fast);
}
}
} else {
$reg->set_error($lang->captchapack_error_no_ans);
}
// Drop all entries with the hash
captchapack_dbdrop($hash);
}
