Fixes #356

[github/shaarli/Shaarli.git] / application / Utils.php

diff --git a/application/Utils.php b/application/Utils.php
old mode 100644 (file)
new mode 100755 (executable)
index fa18f15..120333c
--- a/application/Utils.php
+++ b/application/Utils.php
@@ -97,12 +97,12 @@ function checkDateFormat($format, $string)
  */
 function generateLocation($referer, $host, $loopTerms = array())
 {
-    $final_referer = '?';
+    $finalReferer = '?';
 
     // No referer if it contains any value in $loopCriteria.
     foreach ($loopTerms as $value) {
         if (strpos($referer, $value) !== false) {
-            return $final_referer;
+            return $finalReferer;
         }
     }
 
@@ -111,11 +111,12 @@ function generateLocation($referer, $host, $loopTerms = array())
         $host = substr($host, 0, $pos);
     }
 
-    if (!empty($referer) && strpos(parse_url($referer, PHP_URL_HOST), $host) !== false) {
-        $final_referer = $referer;
+    $refererHost = parse_url($referer, PHP_URL_HOST);
+    if (!empty($referer) && (strpos($refererHost, $host) !== false || startsWith('?', $refererHost))) {
+        $finalReferer = $referer;
     }
 
-    return $final_referer;
+    return $finalReferer;
 }
 
 /**
@@ -140,11 +141,16 @@ function checkPHPVersion($minVersion, $curVersion)
 
 /**
  * Validate session ID to prevent Full Path Disclosure.
+ *
  * See #298.
+ * The session ID's format depends on the hash algorithm set in PHP settings
  *
  * @param string $sessionId Session ID
  *
  * @return true if valid, false otherwise.
+ *
+ * @see http://php.net/manual/en/function.hash-algos.php
+ * @see http://php.net/manual/en/session.configuration.php
  */
 function is_session_id_valid($sessionId)
 {
@@ -156,7 +162,7 @@ function is_session_id_valid($sessionId)
         return false;
     }
 
-    if (!preg_match('/^[a-z0-9]{2,32}$/', $sessionId)) {
+    if (!preg_match('/^[a-zA-Z0-9,-]{2,128}$/', $sessionId)) {
         return false;
     }