key_files_controller.rb

class KeyFilesController < ApplicationController
  before_action :find_project_by_project_id
  before_action :authorize

  def download
    find_key
    unless @key.nil?
      send_file "#{Vault::KEYFILES_DIR}/#{@key.file}", filename: @key.name
    end
  end

  def find_key
    @key = Vault::KeyFile.find(params[:id])
    unless @key.project_id == @project.id
      redirect_to project_keys_path(@project), alert: t('alert.key.not_found')
      @key = nil
    end
  end
end