X509: add methods to enable / disable URL fetching

phpseclib/File/X509.php

@@ -328,6 +328,14 @@ class File_X509
      */
     var $recur_limit = 5;
 
+    /**
+     * URL fetch flag
+     *
+     * @var bool
+     * @access private
+     */
+    var $disable_url_fetch = false;
+
     /**
      * Default Constructor.
      *
@@ -2161,6 +2169,10 @@ class File_X509
      */
     function _fetchURL($url)
     {
+        if ($this->disable_url_fetch) {
+            return false;
+        }
+
         $parts = parse_url($url);
         $data = '';
         switch ($parts['scheme']) {
@@ -2472,6 +2484,26 @@ class File_X509
         $this->recur_limit = $count;
     }
 
+    /**
+     * Prevents URIs from being automatically retrieved
+     *
+     * @access public
+     */
+    function disableURLFetch()
+    {
+        $this->disable_url_fetch = true;
+    }
+
+    /**
+     * Allows URIs to be automatically retrieved
+     *
+     * @access public
+     */
+    function enableURLFetch()
+    {
+        $this->disable_url_fetch = false;
+    }
+
     /**
      * Reformat public keys
      *