Encrypt files with Ruby and OpenSSL

cryptoknight.rb

# Ruby script encrypts files with OpenSSL
# https://github.com/alexavlonitis

i = 1
while i != 0 do
  puts "---MENU---"
  puts "(1) to Encrypt"
  puts "(2) to Decrypt"
  puts "(3) to Exit"
  print ": "
  option = gets.chomp

  c = 1
  if option == "1"
    while c != 0 do
      puts "Type the filename you want to Encrypt, OR 'exit' to go back to menu"
      print ": "
      filename = gets.chomp
      filename == "exit" ? c = 0 : system("openssl aes-256-cbc -a -salt -in #{filename} -out #{filename}.enc")
    end
  elsif option == "2"
    while c != 0 do
      puts "Type the filename you want to Decrypt, OR 'exit' to go back to menu"
      print ": "
      filename = gets.chomp
      name = filename.match(/^\w+/)
      extension = filename.match(/(?<=\.)(.*?)(?=\.)/)
      filename == "exit" ? c = 0 : system("openssl aes-256-cbc -d -a -in #{filename} -out #{name}.#{extension} ")
    end
  elsif option == "3"
    i = 0
  else
    puts "wrong input, Try again."
  end
end