From 77a442a1c36366f76303fd095473151772e39bf4 Mon Sep 17 00:00:00 2001
From: William Vu <William_Vu@rapid7.com>
Date: Thu, 18 Jul 2019 14:23:14 -0500
Subject: [PATCH] Add empty string check

---
 lib/rex/text/xor.rb | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/lib/rex/text/xor.rb b/lib/rex/text/xor.rb
index b744e8c..1c93fa9 100644
--- a/lib/rex/text/xor.rb
+++ b/lib/rex/text/xor.rb
@@ -29,6 +29,11 @@ module Rex::Text
       xor_key = [xor_key].pack('C')
     end
 
+    # Check for empty strings
+    if xor_key.empty? || value.empty?
+      raise ArgumentError, 'XOR key and value must not be empty'
+    end
+
     # Get byte arrays for key and value
     xor_key   = xor_key.bytes
     xor_value = value.bytes