python.py

import sys

def strxor(a, b):     # xor two strings of different lengths
    if len(a) > len(b):
        return "".join([chr(ord(x) ^ ord(y)) for (x, y) in zip(a[:len(b)], b)])
    else:
        return "".join([chr(ord(x) ^ ord(y)) for (x, y) in zip(a, b[:len(a)])])

def encrypt(key, msg):
    c = strxor(key, msg)
    print
    print c.encode('hex')
    return c

ruby.rb

class String
  def xor(msg)
    key= [self].pack("H*").unpack("C*")
    msg = [msg].pack("H*").unpack("C*")
    x = if key.length > msg.length
        msg.zip(key)
      else
        key.zip(msg)
      end
    x = x.collect{|c1,c2| c1^c2}
  end
  
  def hex
    self.unpack("H*").join
  end
end