don't use CRC32

inc/anti-bot.php

@@ -190,7 +190,7 @@ function _create_antibot($board, $thread) {
 	$query->bindValue(':expires', $config['spam']['hidden_inputs_expire']);
 	$query->execute() or error(db_error($query));
 	
-	$query = prepare('INSERT INTO `antispam` VALUES (:board, :thread, CRC32(:hash), UNIX_TIMESTAMP(), NULL, 0)');
+	$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());

install.php

@@ -1,7 +1,7 @@
 <?php
 
 // Installation/upgrade file	
-define('VERSION', 'v0.9.6-dev-3');
+define('VERSION', 'v0.9.6-dev-4');
 
 require 'inc/functions.php';
 
@@ -208,6 +208,8 @@ if (file_exists($config['has_installed'])) {
 				$query->bindValue(':oldboard', $board['id']);
 				$query->execute() or error(db_error($query));
 			}
+		case 'v0.9.6-dev-3':
+			query("ALTER TABLE  `antispam` CHANGE  `hash`  `hash` CHAR( 40 ) NOT NULL") or error(db_error());
 		case false:
 			// Update version number
 			file_write($config['has_installed'], VERSION);

install.sql

@@ -29,7 +29,7 @@ SET time_zone = "+00:00";
 CREATE TABLE IF NOT EXISTS `antispam` (
   `board` varchar(255) NOT NULL,
   `thread` int(11) DEFAULT NULL,
-  `hash` bigint(20) NOT NULL,
+  `hash` char(40) NOT NULL,
   `created` int(11) NOT NULL,
   `expires` int(11) DEFAULT NULL,
   `passed` smallint(6) NOT NULL,