metasploit-framework/lib/metasm/misc/hexdump.rb

#!/usr/bin/env ruby
#    This file is part of Metasm, the Ruby assembly manipulation suite
#    Copyright (C) 2006-2009 Yoann GUILLOT
#
#    Licence is LGPL, see LICENCE in the top-level directory



class IO
def hexdump(ctx={})
  ctx[:noend] = true
  while buf = read(512) and not buf.empty?
    buf.hexdump(ctx)
  end
  ctx.delete :noend
  ''.hexdump(ctx)
end
end

class String
def hexdump(ctx={})
  fmt = ctx[:fmt] ||= ['c', 'd', 'a']
  ctx[:pos] ||= 0
  ctx[:linelen] ||= 16
  scan(/.{1,#{ctx[:linelen]}}/m) { |s|
    if s != ctx[:lastline]
      ctx[:lastdup] = false
      print '%04x  ' % ctx[:pos]
      print s.unpack('C*').map { |b| '%02x' % b }.join(' ').ljust(3*16-1) + '  ' if fmt.include? 'c'
      print s.unpack('v*').map { |b| '%04x' % b }.join(' ').ljust(5*8-1)  + '  ' if fmt.include? 'w'
      print s.unpack('L*').map { |b| '%08x' % b }.join(' ').ljust(9*4-1)  + '  ' if fmt.include? 'd'
      print s.tr("\0-\x1f\x7f-\xff", '.') if fmt.include? 'a'
      puts
    elsif not ctx[:lastdup]
      ctx[:lastdup] = true
      puts '*'
    end
    ctx[:lastline] = s
    ctx[:pos] += s.length
  }
  puts '%04x' % ctx[:pos] if not ctx[:noend]
rescue Errno::EPIPE
  exit
end
end

if $0 == __FILE__
  fmt = []
  fmt << 'c' if ARGV.delete '-C'
  fmt << 'w' if ARGV.delete '-W'
  fmt << 'd' if ARGV.delete '-D'
  fmt << 'a' if ARGV.delete '-A'
  fmt = ['c', 'd', 'a'] if ARGV.delete '-a'
  infd = ARGV.empty? ? $stdin : File.open(ARGV.first, 'rb')
  infd.hexdump(:fmt => fmt)
end