Merge branch 'feature-warden-srp' into develop

14 files changed, 236 insertions, 91 deletions

diff --git a/users/app/controllers/controller_extension/authentication.rb b/users/app/controllers/controller_extension/authentication.rb
index c3342f3..87f7921 100644
--- a/users/app/controllers/controller_extension/authentication.rb
+++ b/users/app/controllers/controller_extension/authentication.rb
@@ -7,8 +7,8 @@ module ControllerExtension::Authentication
     helper_method :current_user, :logged_in?, :admin?
   end
 
-  def current_user
-    @current_user ||= User.find(session[:user_id]) if session[:user_id]
+  def authentication_error
+    warden.winning_strategy.try(:message)
   end
 
   def logged_in?
diff --git a/users/app/controllers/sessions_controller.rb b/users/app/controllers/sessions_controller.rb
index 4a1107d..486f67e 100644
--- a/users/app/controllers/sessions_controller.rb
+++ b/users/app/controllers/sessions_controller.rb
@@ -3,28 +3,20 @@ class SessionsController < ApplicationController
   skip_before_filter :verify_authenticity_token
 
   def new
+    @errors = authentication_error
   end
 
   def create
-    @user = User.find_by_param(params[:login])
-    session[:handshake] = @user.initialize_auth(params['A'].hex)
-    render :json => session[:handshake]
-  rescue RECORD_NOT_FOUND
-    render :json => {:errors => {:login => ["unknown user"]}}
+    authenticate!
   end
 
   def update
-    @srp_session = session.delete(:handshake)
-    @user = @srp_session.authenticate!(params[:client_auth].hex)
-    session[:user_id] = @user.id
-    render :json => @srp_session
-  rescue WRONG_PASSWORD
-    session[:handshake] = nil
-    render :json => {:errors => {"password" => ["wrong password"]}}
+    authenticate!
+    render :json => session.delete(:handshake)
   end
 
   def destroy
-    session[:user_id] = nil
+    logout
     redirect_to root_path
   end
 end
diff --git a/users/app/views/sessions/new.json.erb b/users/app/views/sessions/new.json.erb
new file mode 100644
index 0000000..36154b8
--- /dev/null
+++ b/users/app/views/sessions/new.json.erb
@@ -0,0 +1,3 @@
+{
+"errors": <%= raw @errors.to_json %>
+}
diff --git a/users/config/initializers/warden.rb b/users/config/initializers/warden.rb
new file mode 100644
index 0000000..45feb6c
--- /dev/null
+++ b/users/config/initializers/warden.rb
@@ -0,0 +1,7 @@
+Rails.configuration.middleware.use RailsWarden::Manager do |config|
+  config.default_strategies :secure_remote_password
+  config.failure_app = SessionsController
+end
+
+RailsWarden.unauthenticated_action = :new
+
diff --git a/users/leap_web_users.gemspec b/users/leap_web_users.gemspec
index dec5a71..0682a99 100644
--- a/users/leap_web_users.gemspec
+++ b/users/leap_web_users.gemspec
@@ -18,4 +18,5 @@ Gem::Specification.new do |s|
   s.add_dependency "leap_web_core", LeapWeb::VERSION
 
   s.add_dependency "ruby-srp", "~> 0.1.4"
+  s.add_dependency "rails_warden"
 end
diff --git a/users/lib/leap_web_users/engine.rb b/users/lib/leap_web_users/engine.rb
index 9b7545e..7033576 100644
--- a/users/lib/leap_web_users/engine.rb
+++ b/users/lib/leap_web_users/engine.rb
@@ -1,8 +1,12 @@
 # thou shall require all your dependencies in an engine.
 require "leap_web_core"
 require "leap_web_core/ui_dependencies"
+require "rails_warden"
 require "ruby-srp"
 
+require "warden/session_serializer"
+require "warden/strategies/secure_remote_password"
+
 module LeapWebUsers
   class Engine < ::Rails::Engine
 
diff --git a/users/lib/warden/session_serializer.rb b/users/lib/warden/session_serializer.rb
new file mode 100644
index 0000000..81d7076
--- /dev/null
+++ b/users/lib/warden/session_serializer.rb
@@ -0,0 +1,13 @@
+module Warden
+  # Setup Session Serialization
+  class SessionSerializer
+    def serialize(record)
+      [record.class.name, record.id]
+    end
+
+    def deserialize(keys)
+      klass, id = keys
+      klass.constantize.find(id)
+    end
+  end
+end
diff --git a/users/lib/warden/strategies/secure_remote_password.rb b/users/lib/warden/strategies/secure_remote_password.rb
new file mode 100644
index 0000000..8266e2d
--- /dev/null
+++ b/users/lib/warden/strategies/secure_remote_password.rb
@@ -0,0 +1,57 @@
+module Warden
+  module Strategies
+    class SecureRemotePassword < Warden::Strategies::Base
+
+      def valid?
+        handshake? || authentication?
+      end
+
+      def authenticate!
+        if authentication?
+          validate!
+        else  # handshake
+          initialize!
+        end
+      end
+
+      protected
+
+      def handshake?
+        params['A'] && params['login']
+      end
+
+      def authentication?
+        params['client_auth'] && session[:handshake]
+      end
+
+      def validate!
+        user = session[:handshake].authenticate(params['client_auth'].hex)
+        user ? success!(user) : fail!(:password => "Could not log in")
+      end
+
+      def initialize!
+        user = User.find_by_param(id)
+        session[:handshake] = user.initialize_auth(params['A'].hex)
+        custom! json_response(session[:handshake])
+      rescue RECORD_NOT_FOUND
+        fail! :login => "User not found!"
+      end
+
+      def json_response(object)
+        [ 200,
+          {"Content-Type" => "application/json; charset=utf-8"},
+          [object.to_json]
+        ]
+      end
+
+      def id
+        params["id"] || params["login"]
+      end
+    end
+  end
+  Warden::Strategies.add :secure_remote_password,
+    Warden::Strategies::SecureRemotePassword
+
+end
+
+
diff --git a/users/test/functional/application_controller_test.rb b/users/test/functional/application_controller_test.rb
index 69bcb2f..857bae5 100644
--- a/users/test/functional/application_controller_test.rb
+++ b/users/test/functional/application_controller_test.rb
@@ -8,20 +8,19 @@ class ApplicationControllerTest < ActionController::TestCase
   end
 
   def test_authorize_redirect
-    stub_logged_out
     @controller.send(:authorize)
     assert_access_denied
   end
 
   def test_authorized
-    @user = stub_logged_in
+    login
     @controller.send(:authorize)
     assert_access_denied(false)
   end
 
   def test_authorize_admin
-    @user = stub_logged_in
-    @user.expects(:is_admin?).returns(false)
+    login
+    @current_user.expects(:is_admin?).returns(false)
     @controller.send(:authorize_admin)
     assert_access_denied
   end
diff --git a/users/test/functional/helper_methods_test.rb b/users/test/functional/helper_methods_test.rb
index c0eaf61..2b2375c 100644
--- a/users/test/functional/helper_methods_test.rb
+++ b/users/test/functional/helper_methods_test.rb
@@ -16,26 +16,23 @@ class HelperMethodsTest < ActionController::TestCase
     @controller
   end
 
-  def test_current_user_with_caching
-    @user = stub_logged_in
-    assert_equal @user, current_user
-    assert_equal @user, current_user # tests caching
+  def test_current_user
+    login
+    assert_equal @current_user, current_user
   end
 
   def test_logged_in
-    @user = stub_logged_in
+    login
     assert logged_in?
   end
 
   def test_logged_out
-    stub_logged_out
     assert !logged_in?
   end
 
   def test_admin
-    bool = stub
-    @user = stub_logged_in
-    @user.expects(:is_admin?).returns(bool)
+    login
+    @current_user.expects(:is_admin?).returns(bool = stub)
     assert_equal bool, admin?
   end
 
diff --git a/users/test/functional/sessions_controller_test.rb b/users/test/functional/sessions_controller_test.rb
index 47d7052..8f2d95c 100644
--- a/users/test/functional/sessions_controller_test.rb
+++ b/users/test/functional/sessions_controller_test.rb
@@ -1,75 +1,71 @@
 require 'test_helper'
 
+# This is a simple controller unit test.
+# We're stubbing out both warden and srp.
+# There's an integration test testing the full rack stack and srp
 class SessionsControllerTest < ActionController::TestCase
 
-  def setup
+  setup do
     @user = stub :login => "me", :id => 123
     @client_hex = 'a123'
-    @client_rnd = @client_hex.hex
-    @server_hex = 'b123'
-    @server_rnd = @server_hex.hex
-    @server_rnd_exp = 'e123'.hex
-    @salt = 'stub user salt'
-    @server_handshake = stub :aa => @client_rnd, :bb => @server_rnd, :b => @server_rnd_exp
-    @server_auth = 'adfe'
   end
 
   test "should get login screen" do
+    request.env['warden'].expects(:winning_strategy)
     get :new
     assert_response :success
+    assert_equal "text/html", response.content_type
+    assert_template "sessions/new"
   end
 
-  test "should perform handshake" do
-    @user.expects(:initialize_auth).
-      with(@client_rnd).
-      returns(@server_handshake)
-    @server_handshake.expects(:to_json).
-     returns({'B' => @server_hex, 'salt' => @salt}.to_json)
-    User.expects(:find_by_param).with(@user.login).returns(@user)
-    post :create, :login => @user.login, 'A' => @client_hex
-    assert_equal @server_handshake, session[:handshake]
+  test "renders json" do
+    request.env['warden'].expects(:winning_strategy)
+    get :new, :format => :json
     assert_response :success
-    assert_json_response :B => @server_hex, :salt => @salt
+    assert_json_response :errors => nil
   end
 
-  test "should report user not found" do
-    unknown = "login_that_does_not_exist"
-    User.expects(:find_by_param).with(unknown).raises(RECORD_NOT_FOUND)
-    post :create, :login => unknown
+  test "renders warden errors" do
+    strategy = stub :message => "Warden auth did not work"
+    request.env['warden'].expects(:winning_strategy).returns(strategy)
+    get :new, :format => :json
     assert_response :success
-    assert_json_response :errors => {"login" => ["unknown user"]}
+    assert_json_response :errors => strategy.message
   end
 
-  test "should authorize" do
-    session[:handshake] = @server_handshake
-    @server_handshake.expects(:authenticate!).
-      with(@client_rnd).
-      returns(@user)
-    @server_handshake.expects(:to_json).
-      returns({:M2 => @server_auth}.to_json)
-    post :update, :id => @user.login, :client_auth => @client_hex
-    assert_nil session[:handshake]
-    assert_json_response :M2 => @server_auth
-    assert_equal @user.id, session[:user_id]
+  # Warden takes care of parsing the params and
+  # rendering the response. So not much to test here.
+  test "should perform handshake" do
+    request.env['warden'].expects(:authenticate!)
+    # make sure we don't get a template missing error:
+    @controller.stubs(:render)
+    post :create, :login => @user.login, 'A' => @client_hex
   end
 
-  test "should report wrong password" do
-    session[:handshake] = @server_handshake
-    @server_handshake.expects(:authenticate!).
-      with(@client_rnd).
-      raises(WRONG_PASSWORD)
+  test "should authorize" do
+    request.env['warden'].expects(:authenticate!)
+    handshake = stub(:to_json => "JSON")
+    session[:handshake] = handshake
     post :update, :id => @user.login, :client_auth => @client_hex
     assert_nil session[:handshake]
-    assert_nil session[:user_id]
-    assert_json_response :errors => {"password" => ["wrong password"]}
+    assert_response :success
+    assert_equal handshake.to_json, @response.body
   end
 
-  test "logout should reset sessions user_id" do
-    session[:user_id] = "set"
+  test "logout should reset warden user" do
+    expect_warden_logout
     delete :destroy
-    assert_nil session[:user_id]
     assert_response :redirect
     assert_redirected_to root_url
   end
 
+  def expect_warden_logout
+    raw = mock('raw session') do
+      expects(:inspect)
+    end
+    request.env['warden'].expects(:raw_session).returns(raw)
+    request.env['warden'].expects(:logout)
+  end
+
+
 end
diff --git a/users/test/integration/api/account_flow_test.rb b/users/test/integration/api/account_flow_test.rb
index 5800d46..c9a7109 100644
--- a/users/test/integration/api/account_flow_test.rb
+++ b/users/test/integration/api/account_flow_test.rb
@@ -1,12 +1,26 @@
 require 'test_helper'
 
-class AccountFlowTest < ActionDispatch::IntegrationTest
+CONFIG_RU = (Rails.root + 'config.ru').to_s
+OUTER_APP = Rack::Builder.parse_file(CONFIG_RU).first
+
+class AccountFlowTest < ActiveSupport::TestCase
+  include Rack::Test::Methods
+  include Warden::Test::Helpers
+  include LeapWebCore::AssertResponses
+
+  def app
+    OUTER_APP
+  end
+
+  def teardown
+    Warden.test_reset!
+  end
 
   # this test wraps the api and implements the interface the ruby-srp client.
   def handshake(login, aa)
-    post "sessions", :login => login, 'A' => aa.to_s(16)
-    assert_response :success
-    response = JSON.parse(@response.body)
+    post "/sessions.json", :login => login, 'A' => aa.to_s(16), :format => :json
+    assert last_response.successful?
+    response = JSON.parse(last_response.body)
     if response['errors']
       raise RECORD_NOT_FOUND.new(response['errors'])
     else
@@ -15,9 +29,9 @@ class AccountFlowTest < ActionDispatch::IntegrationTest
   end
 
   def validate(m)
-    put "sessions/" + @login, :client_auth => m.to_s(16)
-    assert_response :success
-    return JSON.parse(@response.body)
+    put "/sessions/" + @login + '.json', :client_auth => m.to_s(16), :format => :json
+    assert last_response.successful?
+    return JSON.parse(last_response.body)
   end
 
   def setup
@@ -40,7 +54,7 @@ class AccountFlowTest < ActionDispatch::IntegrationTest
 
   test "signup response" do
     assert_json_response :login => @login, :ok => true
-    assert_response :success
+    assert last_response.successful?
   end
 
   test "signup and login with srp via api" do
@@ -52,7 +66,7 @@ class AccountFlowTest < ActionDispatch::IntegrationTest
   test "signup and wrong password login attempt" do
     srp = SRP::Client.new(@login, "wrong password")
     server_auth = srp.authenticate(self)
-    assert_equal ["wrong password"], server_auth["errors"]['password']
+    assert_equal "Could not log in", server_auth["errors"]['password']
     assert_nil server_auth["M2"]
   end
 
diff --git a/users/test/support/auth_test_helper.rb b/users/test/support/auth_test_helper.rb
index 9412058..f211597 100644
--- a/users/test/support/auth_test_helper.rb
+++ b/users/test/support/auth_test_helper.rb
@@ -1,17 +1,18 @@
 module AuthTestHelper
+  extend ActiveSupport::Concern
 
-  def stub_logged_in
-    @user_id = stub
-    @user = stub
-    session[:user_id] = @user_id
-    User.expects(:find).once.with(@user_id).returns(@user)
-    return @user
+  # Controller will fetch current user from warden.
+  # Make it pick up our current_user
+  included do
+    setup do
+      request.env['warden'] ||= stub :user => nil
+    end
   end
 
-  def stub_logged_out
-    @user_id = stub
-    session[:user_id] = @user_id
-    User.expects(:find).once.with(@user_id).returns(nil)
+  def login(user = nil)
+    @current_user = user || stub
+    request.env['warden'] = stub :user => @current_user
+    return @current_user
   end
 
   def assert_access_denied(denied = true)
diff --git a/users/test/unit/warden_strategy_secure_remote_password_test.rb b/users/test/unit/warden_strategy_secure_remote_password_test.rb
new file mode 100644
index 0000000..ee68fe7
--- /dev/null
+++ b/users/test/unit/warden_strategy_secure_remote_password_test.rb
@@ -0,0 +1,61 @@
+class WardenStrategySecureRemotePasswordTest < ActiveSupport::TestCase
+
+  setup do
+    @user = stub :login => "me", :id => 123
+    @client_hex = 'a123'
+    @client_rnd = @client_hex.hex
+    @server_hex = 'b123'
+    @server_rnd = @server_hex.hex
+    @server_rnd_exp = 'e123'.hex
+    @salt = 'stub user salt'
+    @server_handshake = stub :aa => @client_rnd, :bb => @server_rnd, :b => @server_rnd_exp
+    @server_auth = 'adfe'
+  end
+
+
+  test "should perform handshake" do
+    @user.expects(:initialize_auth).
+      with(@client_rnd).
+      returns(@server_handshake)
+    @server_handshake.expects(:to_json).
+     returns({'B' => @server_hex, 'salt' => @salt}.to_json)
+    User.expects(:find_by_param).with(@user.login).returns(@user)
+    assert_equal @server_handshake, session[:handshake]
+    assert_response :success
+    assert_json_response :B => @server_hex, :salt => @salt
+  end
+
+  test "should report user not found" do
+    unknown = "login_that_does_not_exist"
+    User.expects(:find_by_param).with(unknown).raises(RECORD_NOT_FOUND)
+    post :create, :login => unknown
+    assert_response :success
+    assert_json_response :errors => {"login" => ["unknown user"]}
+  end
+
+  test "should authorize" do
+    session[:handshake] = @server_handshake
+    @server_handshake.expects(:authenticate!).
+      with(@client_rnd).
+      returns(@user)
+    @server_handshake.expects(:to_json).
+      returns({:M2 => @server_auth}.to_json)
+    post :update, :id => @user.login, :client_auth => @client_hex
+    assert_nil session[:handshake]
+    assert_json_response :M2 => @server_auth
+    assert_equal @user.id, session[:user_id]
+  end
+
+  test "should report wrong password" do
+    session[:handshake] = @server_handshake
+    @server_handshake.expects(:authenticate!).
+      with(@client_rnd).
+      raises(WRONG_PASSWORD)
+    post :update, :id => @user.login, :client_auth => @client_hex
+    assert_nil session[:handshake]
+    assert_nil session[:user_id]
+    assert_json_response :errors => {"password" => ["wrong password"]}
+  end
+
+
+end