From 16d50c48dab06933502ea548ead582bf83e935aa Mon Sep 17 00:00:00 2001
From: patrik <patrik@e0a8ed71-7df4-0310-8962-fdc924857419>
Date: Sun, 16 Dec 2012 16:51:47 +0000
Subject: [PATCH] Squashed commit of the following:

commit fb1fa9373592e81ee004b99cf813e07bf253fbe1
Author: Patrik Karlsson <patrik@cqure.net>
Date:   Sun Dec 16 11:49:36 2012 -0500

    Fix bug where brute library failed to report error on invalid iterators
---
 nselib/brute.lua | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/nselib/brute.lua b/nselib/brute.lua
index d2c52e819..527c99af6 100644
--- a/nselib/brute.lua
+++ b/nselib/brute.lua
@@ -651,6 +651,13 @@ Engine =
 		local usernames = self.usernames
 		local passwords = self.passwords
 
+		if ( "function" ~= type(usernames) ) then
+			return false, "Invalid usernames iterator"
+		end
+		if ( "function" ~= type(passwords) ) then
+			return false, "Invalid passwords iterator"
+		end
+
 		local mode = self.options.mode or stdnse.get_script_args("brute.mode")
 	
 		-- if no mode was given, but a credfile is present, assume creds mode