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-rw-r--r--admin/include/functions.php22
1 files changed, 22 insertions, 0 deletions
diff --git a/admin/include/functions.php b/admin/include/functions.php
index 66d7b52ec..1538a98ae 100644
--- a/admin/include/functions.php
+++ b/admin/include/functions.php
@@ -23,6 +23,28 @@
include(PHPWG_ROOT_PATH.'admin/include/functions_metadata.php');
+/**
+ * check token comming from form posted or get params to prevent csrf attacks
+ * if pwg_token is empty action doesn't require token
+ * else pwg_token is compare to server token
+ *
+ * @return void access denied if token given is not equal to server token
+ */
+function check_token()
+{
+ global $conf;
+
+ $token = hash_hmac('md5', session_id(), $conf['secret_key']);
+
+ if (!empty($_POST['pwg_token']) && ($_POST['pwg_token'] != $token))
+ {
+ access_denied();
+ }
+ elseif (!empty($_GET['pwg_token']) && ($_GET['pwg_token'] != $token))
+ {
+ access_denied();
+ }
+}
// The function delete_site deletes a site and call the function
// delete_categories for each primary category of the site