Add honeypot and challenge to signup form

app/assets/javascripts/discourse/models/user.js.coffee

@@ -190,9 +190,9 @@ window.Discourse.User.reopenClass
       error: (xhr) -> promise.reject(xhr)
     promise
 
-  createAccount: (name, email, password, username) ->
+  createAccount: (name, email, password, username, passwordConfirm, challenge) ->
     $.ajax
       url: '/users'
       dataType: 'json'
-      data: {name: name, email: email, password: password, username: username}
+      data: {name: name, email: email, password: password, username: username, password_confirmation: passwordConfirm, challenge: challenge}
       type: 'POST'

app/assets/javascripts/discourse/templates/modal/create_account.js.handlebars

@@ -49,6 +49,14 @@
       </tr>
       {{/if}}
 
+      <tr class="password-confirmation">
+          <td><label for='new-account-password-confirmation'>Password Again</label></td>
+          <td>
+          {{view Ember.TextField valueBinding="view.accountPasswordConfirm" type="password" id="new-account-password-confirmation"}}
+          {{view Ember.TextField valueBinding="view.accountChallenge" id="new-account-challenge"}}
+          </td>
+      </tr>
+
       </table>
       </form>
     </div>

app/assets/javascripts/discourse/views/modal/create_account_view.js.coffee

@@ -3,6 +3,8 @@ window.Discourse.CreateAccountView = window.Discourse.ModalBodyView.extend Disco
   title: Em.String.i18n('create_account.title')  
   uniqueUsernameValidation: null
   complete: false
+  accountPasswordConfirm: 0
+  accountChallenge: 0
 
 
   submitDisabled: (->
@@ -22,6 +24,8 @@ window.Discourse.CreateAccountView = window.Discourse.ModalBodyView.extend Disco
     # If blank, fail without a reason
     return Discourse.InputValidation.create(failed: true) if @blank('accountName') 
 
+    @fetchConfirmationValue() if @get('accountPasswordConfirm') == 0
+
     # If too short
     return Discourse.InputValidation.create(failed: true, reason: Em.String.i18n('user.name.too_short')) if @get('accountName').length < 3
 
@@ -120,13 +124,22 @@ window.Discourse.CreateAccountView = window.Discourse.ModalBodyView.extend Disco
   ).property('accountPassword')
 
 
+  fetchConfirmationValue: ->
+    $.ajax
+      url: '/users/hp.json',
+      success: (json) =>
+        @set('accountPasswordConfirm', json.value)
+        @set('accountChallenge', json.challenge.split("").reverse().join(""))
+
   createAccount: ->
     name = @get('accountName')
     email = @get('accountEmail')
     password = @get('accountPassword')
     username = @get('accountUsername')
+    passwordConfirm = @get('accountPasswordConfirm')
+    challenge = @get('accountChallenge')
 
-    Discourse.User.createAccount(name, email, password, username).then (result) =>
+    Discourse.User.createAccount(name, email, password, username, passwordConfirm, challenge).then (result) =>
       
       if result.success
         @flash(result.message)

app/assets/stylesheets/application/modal.css.scss

@@ -152,6 +152,9 @@
       margin-bottom: 20px;
     }
   }
+  .password-confirmation {
+    display: none;
+  }
 }
 
 #move-selected {

app/controllers/users_controller.rb

@@ -123,6 +123,12 @@ class UsersController < ApplicationController
   end
 
   def create
+
+    if params[:password_confirmation] != honeypot_value or params[:challenge] != challenge_value.try(:reverse)
+      # Don't give any indication that we caught you in the honeypot
+      return render(:json => {success: true, active: false, message: I18n.t("login.activate_email", email: params[:email]) })
+    end
+
     user = User.new
     user.name = params[:name]
     user.email = params[:email]
@@ -183,6 +189,10 @@ class UsersController < ApplicationController
     render json: {errors: [I18n.t("mothership.access_token_problem")]}
   end
 
+  def get_honeypot_value
+    render json: {value: honeypot_value, challenge: challenge_value}
+  end
+
 
   # all avatars are funneled through here
   def avatar
@@ -320,6 +330,14 @@ class UsersController < ApplicationController
 
   private
 
+    def honeypot_value
+      Digest::SHA1::hexdigest("#{Discourse.current_hostname}:#{Discourse::Application.config.secret_token}")[0,15]
+    end
+
+    def challenge_value
+      '3019774c067cc2b'
+    end
+
     def fetch_user_from_params
       username_lower = params[:username].downcase
       username_lower.gsub!(/\.json$/, '')

config/routes.rb

@@ -80,6 +80,7 @@ Discourse::Application.routes.draw do
   put 'users/password-reset/:token' => 'users#password_reset'
   get 'users/activate-account/:token' => 'users#activate_account'
   get 'users/authorize-email/:token' => 'users#authorize_email'
+  get 'users/hp' => 'users#get_honeypot_value'
 
   get 'user_preferences' => 'users#user_preferences_redirect'
   get 'users/:username/private-messages' => 'user_actions#private_messages', :format => false, :constraints => {:username => USERNAME_ROUTE_FORMAT}

spec/controllers/users_controller_spec.rb

@@ -2,6 +2,11 @@ require 'spec_helper'
 
 describe UsersController do 
 
+  before do
+    UsersController.any_instance.stubs(:honeypot_value).returns(nil)
+    UsersController.any_instance.stubs(:challenge_value).returns(nil)
+  end
+
   describe '.show' do    
     let!(:user) { log_in }
 
@@ -339,7 +344,41 @@ describe UsersController do
         User.where(username: @user.username).first.active.should be_false
       end
     end
-  
+
+    shared_examples_for 'honeypot fails' do
+      it 'should not create a new user' do
+        expect {
+          xhr :post, :create, create_params
+        }.to_not change { User.count }
+      end
+
+      it 'should not send an email' do
+        User.any_instance.expects(:enqueue_welcome_message).never
+        xhr :post, :create, create_params
+      end
+
+      it 'should say it was successful' do
+        xhr :post, :create, create_params
+        json = JSON::parse(response.body)
+        json["success"].should be_true
+      end
+    end
+
+    context 'when honeypot value is wrong' do
+      before do
+        UsersController.any_instance.stubs(:honeypot_value).returns('abc')
+      end
+      let(:create_params) { {:name => @user.name, :username => @user.username, :password => "strongpassword", :email => @user.email, :password_confirmation => 'wrong'} }
+      it_should_behave_like 'honeypot fails'
+    end
+
+    context 'when challenge answer is wrong' do
+      before do
+        UsersController.any_instance.stubs(:challenge_value).returns('abc')
+      end
+      let(:create_params) { {:name => @user.name, :username => @user.username, :password => "strongpassword", :email => @user.email, :challenge => 'abc'} }
+      it_should_behave_like 'honeypot fails'
+    end
   end
 
   context '.username' do