add new function createNonce()

inc/inc.Utils.php

@@ -632,6 +632,22 @@ function seed_pass_verify($password, $hash) { /* {{{ */
 	return $hash == md5($password);
 } /* }}} */
 
+/**
+ * Return nonce for CSP
+ *
+ * @return string
+ */
+function createNonce() { /* {{{ */
+	$length = 16;
+	$usable = true;
+	$bytes = openssl_random_pseudo_bytes($length, $usable);
+	if ($usable === false) {
+			// weak
+			// @TODO do something?
+	}
+	return base64_encode($bytes);
+} /* }}} */
+
 /**
  * Class for creating encrypted api keys
  *