From ab05ee25c1d38c884790337796f7c941e28d36d9 Mon Sep 17 00:00:00 2001
From: Aleksander Machniak <alec@alec.pl>
Date: Sun, 2 Jun 2013 14:44:09 +0200
Subject: [PATCH] Fix backward copat. with cached values serialized but not
 base64-encoded (#1489142)

---
 program/lib/Roundcube/rcube_db.php | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/program/lib/Roundcube/rcube_db.php b/program/lib/Roundcube/rcube_db.php
index adfe3ca3c..b3f549b23 100644
--- a/program/lib/Roundcube/rcube_db.php
+++ b/program/lib/Roundcube/rcube_db.php
@@ -829,9 +829,14 @@ class rcube_db
      */
     public static function decode($input, $serialized = false)
     {
+        // use Base64 encoding to workaround issues with invalid
+        // or null characters in serialized string (#1489142)
         if ($serialized) {
-            // use Base64 encoding to workaround issues with invalid
-            // or null characters in serialized string (#1489142)
+            // Keep backward compatybility where base64 wasn't used
+            if (strpos(substr($input, 0, 16), ':') !== false) {
+                return self::decode(@unserialize($input));
+            }
+
             return @unserialize(base64_decode($input));
         }