Vigenere Code

#!/usr/bin/env rubyDEBUG = falseclass CVigenere		attr_reader :alphabet,:matrix	attr_accessor :key,:crypted,:decrypted		def initialize		@alphabet = ('A'..'Z').to_a		@matrix =  []		@crypted = []		@decrypted = []		for i in 0..@alphabet.size-1 do			@matrix << (@alphabet[i..-1] << @alphabet[0..i-@alphabet.size]).flatten.uniq		end		@key = ''	end			def fixmk(m,k)		m = m.upcase.gsub(/\W/,'').split(//)		k = k.upcase.gsub(/\W/,'').split(//)		aux = []		while aux.size < m.size			for i in 0..k.size-1 do				aux << k[i] if aux.size < m.size			end		end		return m,k,aux	end		def crypt(m='',k='')		m,k,aux = fixmk(m,k)		for i in 0..m.size-1 do			self.crypted << self.matrix[self.alphabet.index(m[i])][self.alphabet.index(aux[i])]		end		self.crypted = self.crypted.join		puts "CRYPTED: #{self.crypted}" if DEBUG	end		def decrypt(m='',k='')		m,k,aux = fixmk(m,k)		for i in 0..m.size-1 do			self.decrypted << self.alphabet[self.matrix[self.alphabet.index(aux[i])].index(m[i])]		end		self.decrypted = self.decrypted.join		puts "DECRYPTED: #{self.decrypted}" if DEBUG	end				end	c = CVigenere.newif ARGV.size == 2 || (ARGV.size == 3 && ARGV[2].downcase == "c")	c.crypt ARGV[0],ARGV[1]	puts c.cryptedelsif ARGV.size == 3 && ARGV[2].downcase == "d"	c.decrypt ARGV[0],ARGV[1]	puts c.decryptedelse	puts "No sabes usar esta mugre"	Kernel::exit!end