Small interface to osx keychain using the command security

security.rb

class Security

  attr_reader :app, :service

  def initialize(app, service = app)
    @app = app
    @service = service
  end

  def get_password
    stdout_str, stderr_str, status = Open3.capture3("security find-generic-password -a #{app} -s #{service} -w")

    if status.success?
      stdout_str.strip
    else
      nil
    end
  end

  def set_password
    password = ask_password

    Open3.popen3("security add-generic-password -a #{app} -s #{service} -w #{password}")  do |stdin, stdout, stderr, wait_thr|
      status = wait_thr.value
      if status.success?
        password
      else
        nil
      end
    end
  end

  private

  def ask_password
    password = ask "Enter password: "

    if password == ""
      raise "Password can't be empty"
    end

    password_confirmation = ask "Enter password confirmation: "

    if password != password_confirmation
      raise "Password confirmation does not match"
    end

    password
  rescue => e
    puts e.message
    retry
  end

  def ask(message)
    print message
    system "stty -echo"
    password = $stdin.gets
    system "stty echo"
    puts
    (password || "").strip
  end
end