From aad6e2a9c4857715c8bd56693d21b87dd0c16263 Mon Sep 17 00:00:00 2001
From: thomascube <thomas@roundcube.net>
Date: Tue, 27 Mar 2007 05:34:30 -0400
Subject: [PATCH] New session authentication, should fix bugs #1483951 and #1484299; testing required

---
 program/include/session.inc |   45 ++++++++++++++++++++++++++++++++++++++-------
 1 files changed, 38 insertions(+), 7 deletions(-)

diff --git a/program/include/session.inc b/program/include/session.inc
index 00ca299..59631af 100644
--- a/program/include/session.inc
+++ b/program/include/session.inc
@@ -36,7 +36,10 @@
 // read session data
 function sess_read($key)
   {
-  global $DB, $SESS_CHANGED;
+  global $DB, $SESS_CHANGED, $SESS_CLIENT_IP;
+  
+  if ($DB->is_error())
+    return FALSE;
   
   $sql_result = $DB->query("SELECT vars, ip, ".$DB->unixtimestamp('changed')." AS changed
                             FROM ".get_table_name('session')."
@@ -45,7 +48,8 @@
 
   if ($sql_arr = $DB->fetch_assoc($sql_result))
     {
-    $SESS_CHANGED = mktime(); //$sql_arr['changed'];
+    $SESS_CHANGED = $sql_arr['changed'];
+    $SESS_CLIENT_IP = $sql_arr['ip'];
 
     if (strlen($sql_arr['vars']))
       return $sql_arr['vars'];
@@ -59,6 +63,9 @@
 function sess_write($key, $vars)
   {
   global $DB;
+  
+  if ($DB->is_error())
+    return FALSE;
 
   $sql_result = $DB->query("SELECT 1
                             FROM ".get_table_name('session')."
@@ -96,6 +103,9 @@
   {
   global $DB;
   
+  if ($DB->is_error())
+    return FALSE;
+  
   // delete session entries in cache table
   $DB->query("DELETE FROM ".get_table_name('cache')."
               WHERE  session_id=?",
@@ -105,7 +115,6 @@
               WHERE sess_id=?",
               $key);
 
-  rcmail_clear_session_temp($key);
   return TRUE;
   }
 
@@ -114,6 +123,9 @@
 function sess_gc($maxlifetime)
   {
   global $DB;
+
+  if ($DB->is_error())
+    return FALSE;
 
   // get all expired sessions  
   $sql_result = $DB->query("SELECT sess_id
@@ -137,17 +149,36 @@
                 WHERE sess_id IN ('".join("','", $a_exp_sessions)."')");
     }
 
-  // remove session specific temp dirs
-  foreach ($a_exp_sessions as $key)
-    rcmail_clear_session_temp($key);
-
   // also run message cache GC
   rcmail_message_cache_gc();
+  rcmail_temp_gc();
 
   return TRUE;
   }
 
 
+function sess_regenerate_id()
+  {
+  $randlen = 32;
+  $randval = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
+  $random = "";
+  for ($i=1; $i <= $randlen; $i++)
+    $random .= substr($randval, rand(0,(strlen($randval) - 1)), 1);
+
+  // use md5 value for id or remove capitals from string $randval
+  $random = md5($random);
+
+  // delete old session record
+  sess_destroy(session_id());
+
+  session_id($random);
+  $cookie = session_get_cookie_params();
+  setcookie(session_name(), $random, $cookie['lifetime'], $cookie['path']);
+
+  return true;
+  }
+
+
 // set custom functions for PHP session management
 session_set_save_handler('sess_open', 'sess_close', 'sess_read', 'sess_write', 'sess_destroy', 'sess_gc');
 

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