add a simple encoder for sh payloads that only replaces spaces. fixes #525

git-svn-id: file:///home/svn/framework3/trunk@7549 4d416f70-5f16-0410-b530-b9f4589650da

modules/encoders/cmd/ifs.rb

@@ -0,0 +1,39 @@
+##
+# $Id: generic_sh.rb 6957 2009-08-17 17:42:39Z hdm $
+##
+
+##
+# This file is part of the Metasploit Framework and may be subject to 
+# redistribution and commercial restrictions. Please see the Metasploit
+# Framework web site for more information on licensing and terms of use.
+# http://metasploit.com/framework/
+##
+
+
+require 'msf/core'
+
+
+class Metasploit3 < Msf::Encoder
+
+	def initialize
+		super(
+			'Name'             => 'Generic ${IFS} Substitution Command Encoder',
+			'Version'          => '$Revision: 6957 $',
+			'Description'      => %q{
+				This encoder uses standard Bourne shell variable substitution
+				to avoid spaces without being overly fancy.
+			},
+			'Author'           => 'egypt',
+			'Arch'             => ARCH_CMD)
+	end
+
+	
+	#
+	# Encodes the payload
+	#
+	def encode_block(state, buf)
+		buf.gsub!(/\s/, '${IFS}')
+		return buf
+	end	
+
+end