Land rapid7#6970, #make_fast_nops for HUGE nop chunks

Author: wwebb-r7

lib/msf/core/exploit.rb

@@ -1002,6 +1002,30 @@ def nop_generator
     }
   end
 
+
+  #
+  # Generates a NOP sled using the #make_nops method.
+  # The difference between this and #make_nops is this method is much faster, good for exploit
+  # developers that actually want huge chunks of NOPs. The downside of using this is the NOP sled
+  # is less randomized.
+  #
+  # @param count [String] Number of NOPs to return.
+  # @return [String] NOPs
+  #
+  def make_fast_nops(count)
+    max_nop_chunk_size = 100
+
+    if count < max_nop_chunk_size
+      return make_nops(count)
+    end
+
+    nops = make_nops(max_nop_chunk_size)
+    nops += nops while nops.length < count
+
+    nops[0, count]
+  end
+
+
   #
   # Generates a nop sled of a supplied length and returns it to the caller.
   #