metasploit-framework/modules/nops/ppc/simple.rb

72 lines
1.4 KiB
Ruby

##
# $Id$
##
##
# This file is part of the Metasploit Framework and may be subject to
# redistribution and commercial restrictions. Please see the Metasploit
# web site for more information on licensing and terms of use.
# http://metasploit.com/
##
require 'msf/core'
###
#
# SingleByte
# ----------
#
# This class implements simple NOP generator for PowerPC
#
###
class Metasploit3 < Msf::Nop
def initialize
super(
'Name' => 'Simple',
'Alias' => 'ppc_simple',
'Version' => '$Revision$',
'Description' => 'Simple NOP generator',
'Author' => 'hdm',
'License' => MSF_LICENSE,
'Arch' => ARCH_PPC)
register_advanced_options(
[
OptBool.new('RandomNops', [ false, "Generate a random NOP sled", true ])
], self.class)
end
def generate_sled(length, opts)
badchars = opts['BadChars'] || ''
random = opts['Random'] || datastore['RandomNops']
if( random and random.match(/^(t|y|1)/i) )
1.upto(1024) do |i|
regs_d = (rand(0x8000 - 0x0800) + 0x0800).to_i
regs_b = [regs_d].pack('n').unpack('B*')[0][1, 15]
flag_o = rand(2).to_i
flag_r = rand(2).to_i
pcword = ["011111#{regs_b}#{flag_o}100001010#{flag_r}"].pack("B*")
failed = false
pcword.each_byte do |c|
failed = true if badchars.include?(c.chr)
end
next if failed
return (pcword * (length / 4))[0, length]
end
end
return ("\x60" * length)[0, length]
end
end