#!/usr/bin/python

################################
#####                      #####
#####      Xor encoder     #####
#####   For encoding file  #####
#####                      #####
#####    Writen by s1n4    #####
#####    June 16 , 2011    #####
#####       3:55 AM        #####
#####                      #####
################################

import sys

def usage() :
    print 'Usage: %s [Key] [File]' % sys.argv[0]
    exit()

def xor(key, fn) :
    try :
        Input = open(fn, 'rb').read()

    except IOError :
        usage()

    res = ''
    c = 0

    for i in Input :
        res += chr(ord(i) ^ ord(key[c]))
        if c == len(key) - 1 :
            c = 0
            continue

        c += 1

    try :
        Output = open(fn, 'wb')
        Output.write(res)

    finally :
        Output.close()
        print key, 'xor', fn

def main() :
    if len(sys.argv) == 3 :
        xor(sys.argv[1], sys.argv[2])

    else :
        usage()

main()

xor.py s1n4 test.zip