request_forgery_protection_test.rb

require 'abstract_unit'
require 'digest/sha1'
require 'active_support/core_ext/string/strip'

# common controller actions
module RequestForgeryProtectionActions
  def index
    render :inline => "<%= form_tag('/') {} %>"
  end

  def show_button
    render :inline => "<%= button_to('New', '/') {} %>"
  end

  def external_form
    render :inline => "<%= form_tag('http://farfar.away/form', :authenticity_token => 'external_token') {} %>"
  end

  def external_form_without_protection
    render :inline => "<%= form_tag('http://farfar.away/form', :authenticity_token => false) {} %>"
  end

  def unsafe
    render :text => 'pwn'
  end

  def meta
    render :inline => "<%= csrf_meta_tags %>"
  end

  def external_form_for
    render :inline => "<%= form_for(:some_resource, :html => { :authenticity_token => 'external_token' }) {} %>"
  end

  def form_for_without_protection
    render :inline => "<%= form_for(:some_resource, :html => { :authenticity_token => false }) {} %>"
  end

  def rescue_action(e) raise e end
end

# sample controllers
class RequestForgeryProtectionController < ActionController::Base
  include RequestForgeryProtectionActions
  protect_from_forgery :only => %w(index meta)
end

class FreeCookieController < RequestForgeryProtectionController
  self.allow_forgery_protection = false

  def index
    render :inline => "<%= form_tag('/') {} %>"
  end

  def show_button
    render :inline => "<%= button_to('New', '/') {} %>"
  end
end

class CustomAuthenticityParamController < RequestForgeryProtectionController
  def form_authenticity_param
    'foobar'
  end
end


# common test methods

module RequestForgeryProtectionTests
  def teardown
    ActionController::Base.request_forgery_protection_token = nil
  end

  def test_should_render_form_with_token_tag
    get :index
    assert_select 'form>div>input[name=?][value=?]', 'authenticity_token', @token
  end

  def test_should_render_external_form_for_with_external_token
    get :external_form_for
    assert_select 'form>div>input[name=?][value=?]', 'authenticity_token', 'external_token'
  end

  def test_should_render_form_for_without_token_tag
    get :form_for_without_protection
    assert_select 'form>div>input[name=?][value=?]', 'authenticity_token', @token, false
  end

  def test_should_render_button_to_with_token_tag
    get :show_button
    assert_select 'form>div>input[name=?][value=?]', 'authenticity_token', @token
  end

  def test_should_render_external_form_with_external_token
    get :external_form
    assert_select 'form>div>input[name=?][value=?]', 'authenticity_token', 'external_token'
  end

  def test_should_render_external_form_without_token
    get :external_form_without_protection
    assert_select 'form>div>input[name=?][value=?]', 'authenticity_token', @token, false
  end

  def test_should_allow_get
    get :index
    assert_response :success
  end

  def test_should_allow_post_without_token_on_unsafe_action
    post :unsafe
    assert_response :success
  end

  def test_should_not_allow_html_post_without_token
    @request.env['CONTENT_TYPE'] = Mime::URL_ENCODED_FORM.to_s
    assert_raise(ActionController::InvalidAuthenticityToken) { post :index, :format => :html }
  end

  def test_should_not_allow_html_put_without_token
    @request.env['CONTENT_TYPE'] = Mime::URL_ENCODED_FORM.to_s
    assert_raise(ActionController::InvalidAuthenticityToken) { put :index, :format => :html }
  end

  def test_should_not_allow_html_delete_without_token
    @request.env['CONTENT_TYPE'] = Mime::URL_ENCODED_FORM.to_s
    assert_raise(ActionController::InvalidAuthenticityToken) { delete :index, :format => :html }
  end

  def test_should_allow_api_formatted_post_without_token
    assert_nothing_raised do
      post :index, :format => 'xml'
    end
  end

  def test_should_not_allow_api_formatted_put_without_token
    assert_nothing_raised do
      put :index, :format => 'xml'
    end
  end

  def test_should_allow_api_formatted_delete_without_token
    assert_nothing_raised do
      delete :index, :format => 'xml'
    end
  end

  def test_should_not_allow_api_formatted_post_sent_as_url_encoded_form_without_token
    assert_raise(ActionController::InvalidAuthenticityToken) do
      @request.env['CONTENT_TYPE'] = Mime::URL_ENCODED_FORM.to_s
      post :index, :format => 'xml'
    end
  end

  def test_should_not_allow_api_formatted_put_sent_as_url_encoded_form_without_token
    assert_raise(ActionController::InvalidAuthenticityToken) do
      @request.env['CONTENT_TYPE'] = Mime::URL_ENCODED_FORM.to_s
      put :index, :format => 'xml'
    end
  end

  def test_should_not_allow_api_formatted_delete_sent_as_url_encoded_form_without_token
    assert_raise(ActionController::InvalidAuthenticityToken) do
      @request.env['CONTENT_TYPE'] = Mime::URL_ENCODED_FORM.to_s
      delete :index, :format => 'xml'
    end
  end

  def test_should_not_allow_api_formatted_post_sent_as_multipart_form_without_token
    assert_raise(ActionController::InvalidAuthenticityToken) do
      @request.env['CONTENT_TYPE'] = Mime::MULTIPART_FORM.to_s
      post :index, :format => 'xml'
    end
  end

  def test_should_not_allow_api_formatted_put_sent_as_multipart_form_without_token
    assert_raise(ActionController::InvalidAuthenticityToken) do
      @request.env['CONTENT_TYPE'] = Mime::MULTIPART_FORM.to_s
      put :index, :format => 'xml'
    end
  end

  def test_should_not_allow_api_formatted_delete_sent_as_multipart_form_without_token
    assert_raise(ActionController::InvalidAuthenticityToken) do
      @request.env['CONTENT_TYPE'] = Mime::MULTIPART_FORM.to_s
      delete :index, :format => 'xml'
    end
  end

  def test_should_allow_xhr_post_without_token
    assert_nothing_raised { xhr :post, :index }
  end

  def test_should_allow_xhr_put_without_token
    assert_nothing_raised { xhr :put, :index }
  end

  def test_should_allow_xhr_delete_without_token
    assert_nothing_raised { xhr :delete, :index }
  end

  def test_should_allow_xhr_post_with_encoded_form_content_type_without_token
    @request.env['CONTENT_TYPE'] = Mime::URL_ENCODED_FORM.to_s
    assert_nothing_raised { xhr :post, :index }
  end

  def test_should_allow_post_with_token
    post :index, :authenticity_token => @token
    assert_response :success
  end

  def test_should_allow_put_with_token
    put :index, :authenticity_token => @token
    assert_response :success
  end

  def test_should_allow_delete_with_token
    delete :index, :authenticity_token => @token
    assert_response :success
  end

  def test_should_allow_post_with_xml
    @request.env['CONTENT_TYPE'] = Mime::XML.to_s
    post :index, :format => 'xml'
    assert_response :success
  end

  def test_should_allow_put_with_xml
    @request.env['CONTENT_TYPE'] = Mime::XML.to_s
    put :index, :format => 'xml'
    assert_response :success
  end

  def test_should_allow_delete_with_xml
    @request.env['CONTENT_TYPE'] = Mime::XML.to_s
    delete :index, :format => 'xml'
    assert_response :success
  end
end

# OK let's get our test on

class RequestForgeryProtectionControllerTest < ActionController::TestCase
  include RequestForgeryProtectionTests
  def setup
    @controller = RequestForgeryProtectionController.new
    @request    = ActionController::TestRequest.new
    @request.format = :html
    @response   = ActionController::TestResponse.new
    @token      = "cf50faa3fe97702ca1ae"

    ActiveSupport::SecureRandom.stubs(:base64).returns(@token)
    ActionController::Base.request_forgery_protection_token = :authenticity_token
  end

  test 'should emit a csrf-token meta tag' do
    ActiveSupport::SecureRandom.stubs(:base64).returns(@token + '<=?')
    get :meta
    assert_equal <<-METAS.strip_heredoc.chomp, @response.body
      <meta name="csrf-param" content="authenticity_token"/>
      <meta name="csrf-token" content="cf50faa3fe97702ca1ae&lt;=?"/>
    METAS
  end
end

class FreeCookieControllerTest < ActionController::TestCase
  def setup
    @controller = FreeCookieController.new
    @request    = ActionController::TestRequest.new
    @response   = ActionController::TestResponse.new
    @token      = "cf50faa3fe97702ca1ae"

    ActiveSupport::SecureRandom.stubs(:base64).returns(@token)
  end

  def test_should_not_render_form_with_token_tag
    get :index
    assert_select 'form>div>input[name=?][value=?]', 'authenticity_token', @token, false
  end

  def test_should_not_render_button_to_with_token_tag
    get :show_button
    assert_select 'form>div>input[name=?][value=?]', 'authenticity_token', @token, false
  end

  def test_should_allow_all_methods_without_token
    [:post, :put, :delete].each do |method|
      assert_nothing_raised { send(method, :index)}
    end
  end

  test 'should not emit a csrf-token meta tag' do
    get :meta
    assert_blank @response.body
  end
end

class CustomAuthenticityParamControllerTest < ActionController::TestCase
  def setup
    ActionController::Base.request_forgery_protection_token = :authenticity_token
  end

  def test_should_allow_custom_token
    post :index, :authenticity_token => 'foobar'
    assert_response :ok
  end
end