# File lib/ezcrypto.rb, line 383
    def decrypt_file(src, tgt=nil, options = {} )
      options = { :suffix => '.ez', :autoclean => 'true' }.update(options)
      unless tgt
        tgt = src
        tgt = tgt.gsub(/#{options[:suffix]}$/, '')
      end
      cipher_file :on_decrypter, src, tgt, options[:autoclean]
    end