Extract security_key_options endpoint to standalone controller (#38367)

app/controllers/auth/sessions/security_key_options_controller.rb

@@ -0,0 +1,24 @@
+# frozen_string_literal: true
+
+class Auth::Sessions::SecurityKeyOptionsController < ApplicationController
+  skip_before_action :check_self_destruct!
+  skip_before_action :require_functional!
+  skip_before_action :update_user_sign_in
+
+  def show
+    user = User.find_by(id: session[:attempt_user_id])
+
+    if user&.webauthn_enabled?
+      options_for_get = WebAuthn::Credential.options_for_get(
+        allow: user.webauthn_credentials.pluck(:external_id),
+        user_verification: 'discouraged'
+      )
+
+      session[:webauthn_challenge] = options_for_get.challenge
+
+      render json: options_for_get, status: 200
+    else
+      render json: { error: t('webauthn_credentials.not_enabled') }, status: 401
+    end
+  end
+end

app/controllers/auth/sessions_controller.rb

@@ -38,23 +38,6 @@ class Auth::SessionsController < Devise::SessionsController
     flash.delete(:notice)
   end
 
-  def webauthn_options
-    user = User.find_by(id: session[:attempt_user_id])
-
-    if user&.webauthn_enabled?
-      options_for_get = WebAuthn::Credential.options_for_get(
-        allow: user.webauthn_credentials.pluck(:external_id),
-        user_verification: 'discouraged'
-      )
-
-      session[:webauthn_challenge] = options_for_get.challenge
-
-      render json: options_for_get, status: 200
-    else
-      render json: { error: t('webauthn_credentials.not_enabled') }, status: 401
-    end
-  end
-
   protected
 
   def find_user

config/routes.rb

@@ -76,8 +76,10 @@ Rails.application.routes.draw do
     namespace :auth do
       resource :setup, only: [:show, :update], controller: :setup
       resource :challenge, only: [:create]
-      get 'sessions/security_key_options', to: 'sessions#webauthn_options'
       post 'captcha_confirmation', to: 'confirmations#confirm_captcha', as: :captcha_confirmation
+      namespace :sessions do
+        resource :security_key_options, only: :show
+      end
     end
   end
 

spec/requests/auth/sessions/security_key_options_spec.rb

@@ -5,9 +5,9 @@ require 'webauthn/fake_client'
 
 RSpec.describe 'Security Key Options' do
   describe 'GET /auth/sessions/security_key_options' do
-    let!(:user) do
-      Fabricate(:user, email: 'x@y.com', password: 'abcdefgh', otp_required_for_login: true, otp_secret: User.generate_otp_secret)
-    end
+    subject { get '/auth/sessions/security_key_options' }
+
+    let!(:user) { Fabricate(:user, email: 'x@y.com', password: 'abcdefgh', otp_required_for_login: true, otp_secret: User.generate_otp_secret) }
 
     context 'with WebAuthn and OTP enabled as second factor' do
       let(:domain) { "#{Rails.configuration.x.use_https ? 'https' : 'http'}://#{Rails.configuration.x.web_domain}" }
@@ -19,31 +19,55 @@ RSpec.describe 'Security Key Options' do
         user.update(webauthn_id: WebAuthn.generate_user_id)
         Fabricate(
           :webauthn_credential,
-          user_id: user.id,
           external_id: public_key_credential.id,
-          public_key: public_key_credential.public_key
+          public_key: public_key_credential.public_key,
+          user_id: user.id
         )
-        post '/auth/sign_in', params: { user: { email: user.email, password: user.password } }
       end
 
+      context 'when signed in' do
+        before { post '/auth/sign_in', params: { user: { email: user.email, password: user.password } } }
+
         it 'returns http success' do
-        get '/auth/sessions/security_key_options'
+          subject
 
           expect(response)
             .to have_http_status 200
-        expect(response.content_type)
-          .to start_with('application/json')
+          expect(response.media_type)
+            .to eq('application/json')
+          expect(response.parsed_body)
+            .to include(
+              challenge: be_present,
+              userVerification: eq('discouraged'),
+              allowCredentials: contain_exactly(include(type: 'public-key', id: be_present))
+            )
+        end
+      end
+
+      context 'when not signed in' do
+        it 'returns http unauthorized' do
+          subject
+
+          expect(response)
+            .to have_http_status 401
+          expect(response.media_type)
+            .to eq('application/json')
+          expect(response.parsed_body)
+            .to include(error: I18n.t('webauthn_credentials.not_enabled'))
+        end
       end
     end
 
     context 'when WebAuthn not enabled' do
       it 'returns http unauthorized' do
-        get '/auth/sessions/security_key_options'
+        subject
 
         expect(response)
           .to have_http_status 401
-        expect(response.content_type)
-          .to start_with('application/json')
+        expect(response.media_type)
+          .to eq('application/json')
+        expect(response.parsed_body)
+          .to include(error: I18n.t('webauthn_credentials.not_enabled'))
       end
     end
   end