Switched from md5 to a faster xxHash hash function (#921)

* Support for IDN domains

* Announcer support for answering stopped events

* Update init_tr.php

* Informing message

* Update announce.php

* Switched from md5 to a faster xxHash hash function

---------

Co-authored-by: Roman Kelesidis <roman25052006.kelesh@gmail.com>

bt/announce.php

@@ -26,14 +26,11 @@ if (isset($_GET['?info_hash']) && !isset($_GET['info_hash'])) {
     $_GET['info_hash'] = $_GET['?info_hash'];
 }
 
-$is_bt_v2 = null;
-$is_hybrid = $hybrid_v1_hash = $hybrid_v2_hash = $hybrid_tor_update = false;
-
 // Initial request verification
 if (strpos($_SERVER['REQUEST_URI'], 'scrape') !== false) {
     msg_die('Please disable SCRAPE!');
 }
-if (!isset($_GET[$passkey_key]) || !is_string($_GET[$passkey_key]) || strlen($_GET[$passkey_key]) != BT_AUTH_KEY_LENGTH) {
+if (!isset($_GET[$passkey_key]) || !is_string($_GET[$passkey_key]) || strlen($_GET[$passkey_key]) !== BT_AUTH_KEY_LENGTH) {
     msg_die('Please LOG IN and RE-DOWNLOAD this torrent (passkey not found)');
 }
 
@@ -60,7 +57,7 @@ $passkey = $$passkey_key ?? null;
 if (!isset($peer_id)) {
     msg_die('peer_id was not provided');
 }
-if (strlen($peer_id) != 20) {
+if (strlen($peer_id) !== 20) {
     msg_die('Invalid peer_id: ' . bin2hex($peer_id));
 }
 
@@ -73,9 +70,9 @@ if (!isset($info_hash)) {
 $info_hash_hex = bin2hex($info_hash);
 
 // Check info_hash version
-if (strlen($info_hash) == 32) {
+if (strlen($info_hash) === 32) {
     $is_bt_v2 = true;
-} elseif (strlen($info_hash) == 20) {
+} elseif (strlen($info_hash) === 20) {
     $is_bt_v2 = false;
 } else {
     msg_die('Invalid info_hash: ' . $info_hash_hex);
@@ -125,8 +122,7 @@ if (!\TorrentPier\Helpers\IPHelper::isValid($ip)) {
 $ip_sql = \TorrentPier\Helpers\IPHelper::ip2long($ip);
 
 // Peer unique id
-$peer_hash = md5(rtrim($info_hash, ' ') . $passkey . $ip . $port);
-
+$peer_hash = hash('xxh128', rtrim($info_hash, ' ') . $passkey . $ip . $port);
 // Events
 $stopped = ($event === 'stopped');
 
@@ -300,7 +296,7 @@ if ($bb_cfg['tracker']['freeleech'] && $down_add) {
 // Insert / update peer info
 $peer_info_updated = false;
 $update_time = ($stopped) ? 0 : TIMENOW;
-if (($is_hybrid && $hybrid_tor_update) || !$is_hybrid) { // Update statistics only for one topic
+if (isset($is_hybrid, $hybrid_tor_update) || !isset($is_hybrid)) { // Update statistics only for one topic
     if ($lp_info) {
         $sql = "UPDATE " . BB_BT_TRACKER . " SET update_time = $update_time";
 
@@ -408,11 +404,11 @@ if (!$output) {
         'complete' => (int)$seeders,
         'incomplete' => (int)$leechers,
         'downloaded' => (int)$client_completed,
-        'warning message' => 'Statistics were updated',
         'peers' => $peers,
     ];
 
     $peers_list_cached = CACHE('tr_cache')->set(PEERS_LIST_PREFIX . $topic_id, $output, PEERS_LIST_EXPIRE);
+    $output['warning message'] = 'Statistics were updated';
 }
 
 // Return data to client

index.php

@@ -131,7 +131,7 @@ $replace_in_parent = [
     'last_topic_id'
 ];
 
-$cache_name = 'index_sql_' . md5($sql);
+$cache_name = 'index_sql_' . hash('xxh128', $sql);
 if (!$cat_forums = CACHE('bb_cache')->get($cache_name)) {
     $cat_forums = [];
     foreach (DB()->fetch_rowset($sql) as $row) {

src/Legacy/Template.php

@@ -684,7 +684,7 @@ class Template
                     continue;
                 }
                 $line = '<' . '?php ';
-                $filehash = md5($params_str . $this->include_count . TIMENOW);
+                $filehash = hash('xxh128', $params_str . $this->include_count . TIMENOW);
                 $line .= ' $this->set_filename(\'xs_include_' . $filehash . '\', \'' . $params_str . '\', true); ';
                 $line .= ' $this->pparse(\'xs_include_' . $filehash . '\'); ';
                 $line .= ' ?' . '>';

src/Legacy/Torrent.php

@@ -362,7 +362,7 @@ class Torrent
 
         // Getting info_hash v1
         if ($bt_v1) {
-            $info_hash = pack('H*', sha1(\SandFox\Bencode\Bencode::encode($info)));
+            $info_hash = pack('H*', hash('sha1', \SandFox\Bencode\Bencode::encode($info)));
             $info_hash_sql = rtrim(DB()->escape($info_hash), ' ');
             $info_hash_where = "WHERE info_hash = '$info_hash_sql'";
         }