From 9a59aa7a3cbb0e741b9b50b6b6ce8bd021b2479a Mon Sep 17 00:00:00 2001
From: Brett Profitt <brett.profitt@gmail.com>
Date: Mon, 14 May 2012 17:35:53 -0700
Subject: Only caching access lists after ready, system fires.

This prevents a bug where access lists could be cached
and not cleared during plugin boot while access was disabled,
which could expose entities set to ACCESS_PRIVATE.
---
 engine/lib/access.php | 31 +++++++++++++++++++------------
 1 file changed, 19 insertions(+), 12 deletions(-)

(limited to 'engine/lib/access.php')

diff --git a/engine/lib/access.php b/engine/lib/access.php
index 6be252c6a..702e2c1cb 100644
--- a/engine/lib/access.php
+++ b/engine/lib/access.php
@@ -31,7 +31,7 @@ function get_access_list($user_id = 0, $site_id = 0, $flush = false) {
 	global $CONFIG, $init_finished;
 	static $access_list;
 
-	if (!isset($access_list) || !$init_finished) {
+	if (!isset($access_list)) {
 		$access_list = array();
 	}
 
@@ -49,9 +49,15 @@ function get_access_list($user_id = 0, $site_id = 0, $flush = false) {
 		return $access_list[$user_id];
 	}
 
-	$access_list[$user_id] = "(" . implode(",", get_access_array($user_id, $site_id, $flush)) . ")";
+	$access = "(" . implode(",", get_access_array($user_id, $site_id, $flush)) . ")";
 
-	return $access_list[$user_id];
+	// only cache if done with init
+	if ($init_finished) {
+		$access_list[$user_id] = $access;
+		return $access_list[$user_id];
+	} else {
+		return $access;
+	}
 }
 
 /**
@@ -83,7 +89,7 @@ function get_access_array($user_id = 0, $site_id = 0, $flush = false) {
 	// this cache might be redundant. But db cache is flushed on every db write.
 	static $access_array;
 
-	if (!isset($access_array) || (!isset($init_finished)) || (!$init_finished)) {
+	if (!isset($access_array)) {
 		$access_array = array();
 	}
 
@@ -137,12 +143,11 @@ function get_access_array($user_id = 0, $site_id = 0, $flush = false) {
 				$tmp_access_array[] = ACCESS_PRIVATE;
 			}
 
-			$access_array[$user_id] = $tmp_access_array;
-		} else {
-			// No user id logged in so we can only access public info
-			$tmp_return = $tmp_access_array;
+			// only cache if done with init
+			if ($init_finished) {
+				$access_array[$user_id] = $tmp_access_array;
+			}
 		}
-
 	} else {
 		$tmp_access_array = $access_array[$user_id];
 	}
@@ -946,7 +951,8 @@ function elgg_get_access_object() {
  *
  * @global bool $init_finished
  * @access private
- * @todo investigate why this is needed
+ * @todo This is required to tell the access system to start caching because
+ * calls are made while in ignore access mode and before the user is logged in.
  */
 $init_finished = false;
 
@@ -1014,8 +1020,9 @@ function access_test($hook, $type, $value, $params) {
 	return $value;
 }
 
-// This function will let us know when 'init' has finished
-elgg_register_event_handler('init', 'system', 'access_init', 9999);
+// Tell the access functions the system has booted, plugins are loaded,
+// and the user is logged in so it can start caching
+elgg_register_event_handler('ready', 'system', 'access_init');
 
 // For overrided permissions
 elgg_register_plugin_hook_handler('permissions_check', 'all', 'elgg_override_permissions');
-- 
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