gistfile1.txt

class KeyGenerator
  @queue = :keys_queue
  def self.perform(key_id, key_password)
    key = Key.find(key_id)
    
    tmpfile = Rails.root + 'tmp/' + SecureRandom.urlsafe_base64

    require "pty"
    require "expect"

    PTY.spawn("openssl genrsa -aes256 2048 > #{tmpfile}") do |reader, writer|
      reader.expect("Enter pass phrase:")
      writer.puts("#{key_password}\n")
      reader.expect("Verifying - Enter pass phrase:")
      writer.puts("#{key_password}\n")
    end

    key.update_attribute(:body, `cat #{tmpfile}`)
    `rm #{tmpfile}`
  end
end