mastodon/app/controllers/auth/sessions_controller.rb
santiagorodriguez96 e8d41bc2fe
Add WebAuthn as an alternative 2FA method (#14466)
* feat: add possibility of adding WebAuthn security keys to use as 2FA

This adds a basic UI for enabling WebAuthn 2FA. We did a little refactor
to the Settings page for editing the 2FA methods – now it will list the
methods that are available to the user (TOTP and WebAuthn) and from
there they'll be able to add or remove any of them.
Also, it's worth mentioning that for enabling WebAuthn it's required to
have TOTP enabled, so the first time that you go to the 2FA Settings
page, you'll be asked to set it up.
This work was inspired by the one donde by Github in their platform, and
despite it could be approached in different ways, we decided to go with
this one given that we feel that this gives a great UX.

Co-authored-by: Facundo Padula <facundo.padula@cedarcode.com>

* feat: add request for WebAuthn as second factor at login if enabled

This commits adds the feature for using WebAuthn as a second factor for
login when enabled.
If users have WebAuthn enabled, now a page requesting for the use of a
WebAuthn credential for log in will appear, although a link redirecting
to the old page for logging in using a two-factor code will also be
present.

Co-authored-by: Facundo Padula <facundo.padula@cedarcode.com>

* feat: add possibility of deleting WebAuthn Credentials

Co-authored-by: Facundo Padula <facundo.padula@cedarcode.com>

* feat: disable WebAuthn when an Admin disables 2FA for a user

Co-authored-by: Facundo Padula <facundo.padula@cedarcode.com>

* feat: remove ability to disable TOTP leaving only WebAuthn as 2FA

Following examples form other platforms like Github, we decided to make
Webauthn 2FA secondary to 2FA with TOTP, so that we removed the
possibility of removing TOTP authentication only, leaving users with
just WEbAuthn as 2FA. Instead, users will have to click on 'Disable 2FA'
in order to remove second factor auth.
The reason for WebAuthn being secondary to TOPT is that in that way,
users will still be able to log in using their code from their phone's
application if they don't have their security keys with them – or maybe
even lost them.

* We had to change a little the flow for setting up TOTP, given that now
  it's possible to setting up again if you already had TOTP, in order to
  let users modify their authenticator app – given that now it's not
  possible for them to disable TOTP and set it up again with another
  authenticator app.
  So, basically, now instead of storing the new `otp_secret` in the
  user, we store it in the session until the process of set up is
  finished.
  This was because, as it was before, when users clicked on 'Edit' in
  the new two-factor methods lists page, but then went back without
  finishing the flow, their `otp_secret` had been changed therefore
  invalidating their previous authenticator app, making them unable to
  log in again using TOTP.

Co-authored-by: Facundo Padula <facundo.padula@cedarcode.com>

* refactor: fix eslint errors

The PR build was failing given that linting returning some errors.
This commit attempts to fix them.

* refactor: normalize i18n translations

The build was failing given that i18n translations files were not
normalized.
This commits fixes that.

* refactor: avoid having the webauthn gem locked to a specific version

* refactor: use symbols for routes without '/'

* refactor: avoid sending webauthn disabled email when 2FA is disabled

When an admins disable 2FA for users, we were sending two mails
to them, one notifying that 2FA was disabled and the other to notify
that WebAuthn was disabled.
As the second one is redundant since the first email includes it, we can
remove it and send just one email to users.

* refactor: avoid creating new env variable for webauthn_origin config

* refactor: improve flash error messages for webauthn pages

Co-authored-by: Facundo Padula <facundo.padula@cedarcode.com>
2020-08-24 16:46:27 +02:00

119 lines
2.9 KiB
Ruby

# frozen_string_literal: true
class Auth::SessionsController < Devise::SessionsController
include Devise::Controllers::Rememberable
layout 'auth'
skip_before_action :require_no_authentication, only: [:create]
skip_before_action :require_functional!
include TwoFactorAuthenticationConcern
include SignInTokenAuthenticationConcern
before_action :set_instance_presenter, only: [:new]
before_action :set_body_classes
def new
Devise.omniauth_configs.each do |provider, config|
return redirect_to(omniauth_authorize_path(resource_name, provider)) if config.strategy.redirect_at_sign_in
end
super
end
def create
super do |resource|
remember_me(resource)
flash.delete(:notice)
end
end
def destroy
tmp_stored_location = stored_location_for(:user)
super
session.delete(:challenge_passed_at)
flash.delete(:notice)
store_location_for(:user, tmp_stored_location) if continue_after?
end
def webauthn_options
user = find_user
if user.webauthn_enabled?
options_for_get = WebAuthn::Credential.options_for_get(
allow: user.webauthn_credentials.pluck(:external_id)
)
session[:webauthn_challenge] = options_for_get.challenge
render json: options_for_get, status: :ok
else
render json: { error: t('webauthn_credentials.not_enabled') }, status: :unauthorized
end
end
protected
def find_user
if session[:attempt_user_id]
User.find(session[:attempt_user_id])
else
user = User.authenticate_with_ldap(user_params) if Devise.ldap_authentication
user ||= User.authenticate_with_pam(user_params) if Devise.pam_authentication
user ||= User.find_for_authentication(email: user_params[:email])
user
end
end
def user_params
params.require(:user).permit(:email, :password, :otp_attempt, :sign_in_token_attempt, credential: {})
end
def after_sign_in_path_for(resource)
last_url = stored_location_for(:user)
if home_paths(resource).include?(last_url)
root_path
else
last_url || root_path
end
end
def after_sign_out_path_for(_resource_or_scope)
Devise.omniauth_configs.each_value do |config|
return root_path if config.strategy.redirect_at_sign_in
end
super
end
def require_no_authentication
super
# Delete flash message that isn't entirely useful and may be confusing in
# most cases because /web doesn't display/clear flash messages.
flash.delete(:alert) if flash[:alert] == I18n.t('devise.failure.already_authenticated')
end
private
def set_instance_presenter
@instance_presenter = InstancePresenter.new
end
def set_body_classes
@body_classes = 'lighter'
end
def home_paths(resource)
paths = [about_path]
if single_user_mode? && resource.is_a?(User)
paths << short_account_path(username: resource.account)
end
paths
end
def continue_after?
truthy_param?(:continue)
end
end