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-rw-r--r--app/controllers/auth/sessions_controller.rb55
-rw-r--r--app/views/auth/sessions/new.html.haml1
-rw-r--r--app/views/auth/sessions/two_factor.html.haml10
-rw-r--r--config/locales/en.yml1
-rw-r--r--config/locales/simple_form.en.yml2
5 files changed, 64 insertions, 5 deletions
diff --git a/app/controllers/auth/sessions_controller.rb b/app/controllers/auth/sessions_controller.rb
index 889b20e11..4184750f3 100644
--- a/app/controllers/auth/sessions_controller.rb
+++ b/app/controllers/auth/sessions_controller.rb
@@ -5,18 +5,33 @@ class Auth::SessionsController < Devise::SessionsController
 
   layout 'auth'
 
-  before_action :configure_sign_in_params, only: [:create]
+  skip_before_action :require_no_authentication, only: [:create]
+  prepend_before_action :authenticate_with_two_factor, if: :two_factor_enabled?, only: [:create]
 
   def create
     super do |resource|
       remember_me(resource)
+      flash[:notice] = nil
     end
   end
 
+  def destroy
+    super
+    flash[:notice] = nil
+  end
+
   protected
 
-  def configure_sign_in_params
-    devise_parameter_sanitizer.permit(:sign_in, keys: [:otp_attempt])
+  def find_user
+    if session[:otp_user_id]
+      User.find(session[:otp_user_id])
+    elsif user_params[:email]
+      User.find_by(email: user_params[:email])
+    end
+  end
+
+  def user_params
+    params.require(:user).permit(:email, :password, :otp_attempt)
   end
 
   def after_sign_in_path_for(_resource)
@@ -28,4 +43,38 @@ class Auth::SessionsController < Devise::SessionsController
       last_url || root_path
     end
   end
+
+  def two_factor_enabled?
+    find_user.try(:otp_required_for_login?)
+  end
+
+  def valid_otp_attempt?(user)
+    user.validate_and_consume_otp!(user_params[:otp_attempt])
+  end
+
+  def authenticate_with_two_factor
+    user = self.resource = find_user
+
+    if user_params[:otp_attempt].present? && session[:otp_user_id]
+      authenticate_with_two_factor_via_otp(user)
+    elsif user && user.valid_password?(user_params[:password])
+      prompt_for_two_factor(user)
+    end
+  end
+
+  def authenticate_with_two_factor_via_otp(user)
+    if valid_otp_attempt?(user)
+      session.delete(:otp_user_id)
+      remember_me(user)
+      sign_in(user)
+    else
+      flash.now[:alert] = I18n.t('users.invalid_otp_token')
+      prompt_for_two_factor(user)
+    end
+  end
+
+  def prompt_for_two_factor(user)
+    session[:otp_user_id] = user.id
+    render :two_factor
+  end
 end
diff --git a/app/views/auth/sessions/new.html.haml b/app/views/auth/sessions/new.html.haml
index 192a54bc6..93b9629f1 100644
--- a/app/views/auth/sessions/new.html.haml
+++ b/app/views/auth/sessions/new.html.haml
@@ -4,7 +4,6 @@
 = simple_form_for(resource, as: resource_name, url: session_path(resource_name)) do |f|
   = f.input :email, autofocus: true, placeholder: t('simple_form.labels.defaults.email'), required: true, input_html: { 'aria-label' => t('simple_form.labels.defaults.email') }
   = f.input :password, placeholder: t('simple_form.labels.defaults.password'), required: true, input_html: { 'aria-label' => t('simple_form.labels.defaults.password') }
-  = f.input :otp_attempt, placeholder: t('simple_form.labels.defaults.otp_attempt'), input_html: { 'aria-label' => t('simple_form.labels.defaults.otp_attempt') }
 
   .actions
     = f.button :button, t('auth.login'), type: :submit
diff --git a/app/views/auth/sessions/two_factor.html.haml b/app/views/auth/sessions/two_factor.html.haml
new file mode 100644
index 000000000..8bf998554
--- /dev/null
+++ b/app/views/auth/sessions/two_factor.html.haml
@@ -0,0 +1,10 @@
+- content_for :page_title do
+  = t('auth.login')
+
+= simple_form_for(resource, as: resource_name, url: session_path(resource_name), method: :post) do |f|
+  = f.input :otp_attempt, placeholder: t('simple_form.labels.defaults.otp_attempt'), input_html: { 'aria-label' => t('simple_form.labels.defaults.otp_attempt') }, required: true, autofocus: true, autocomplete: 'off'
+
+  .actions
+    = f.button :button, t('auth.login'), type: :submit
+
+.form-footer= render "auth/shared/links"
diff --git a/config/locales/en.yml b/config/locales/en.yml
index 941fe5b3f..44396039c 100644
--- a/config/locales/en.yml
+++ b/config/locales/en.yml
@@ -114,5 +114,6 @@ en:
     instructions_html: "<strong>Scan this QR code into Google Authenticator or a similiar app on your phone</strong>. From now on, that app will generate tokens that you will have to enter when logging in."
   users:
     invalid_email: The e-mail address is invalid
+    invalid_otp_token: Invalid two-factor code
   will_paginate:
     page_gap: "&hellip;"
diff --git a/config/locales/simple_form.en.yml b/config/locales/simple_form.en.yml
index 5ef4a18fa..09957c914 100644
--- a/config/locales/simple_form.en.yml
+++ b/config/locales/simple_form.en.yml
@@ -21,7 +21,7 @@ en:
         locked: Make account private
         new_password: New password
         note: Bio
-        otp_attempt: If enabled, two-factor token
+        otp_attempt: Two-factor code
         password: Password
         username: Username
       interactions: