gitlab-org--gitlab-foss/app/controllers/concerns/authenticates_with_two_factor.rb
Timothy Andrew 86b07caa59 Implement authentication (login) using a U2F device.
- Move the `authenticate_with_two_factor` method from
  `ApplicationController` to the `AuthenticatesWithTwoFactor` module,
  where it should be.
2016-06-06 12:50:31 +05:30

87 lines
2.8 KiB
Ruby

# == AuthenticatesWithTwoFactor
#
# Controller concern to handle two-factor authentication
#
# Upon inclusion, skips `require_no_authentication` on `:create`.
module AuthenticatesWithTwoFactor
extend ActiveSupport::Concern
included do
# This action comes from DeviseController, but because we call `sign_in`
# manually, not skipping this action would cause a "You are already signed
# in." error message to be shown upon successful login.
skip_before_action :require_no_authentication, only: [:create]
end
# Store the user's ID in the session for later retrieval and render the
# two factor code prompt
#
# The user must have been authenticated with a valid login and password
# before calling this method!
#
# user - User record
#
# Returns nil
def prompt_for_two_factor(user)
session[:otp_user_id] = user.id
setup_u2f_authentication(user)
render 'devise/sessions/two_factor'
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_params[:device_response].present? && session[:otp_user_id]
authenticate_with_two_factor_via_u2f(user)
elsif user && user.valid_password?(user_params[:password])
prompt_for_two_factor(user)
end
end
private
def authenticate_with_two_factor_via_otp(user)
if valid_otp_attempt?(user)
# Remove any lingering user data from login
session.delete(:otp_user_id)
remember_me(user) if user_params[:remember_me] == '1'
sign_in(user)
else
flash.now[:alert] = 'Invalid two-factor code.'
render :two_factor
end
end
# Authenticate using the response from a U2F (universal 2nd factor) device
def authenticate_with_two_factor_via_u2f(user)
if U2fRegistration.authenticate(user, u2f_app_id, user_params[:device_response], session[:challenges])
# Remove any lingering user data from login
session.delete(:otp_user_id)
session.delete(:challenges)
sign_in(user)
else
flash.now[:alert] = 'Authentication via U2F device failed.'
prompt_for_two_factor(user)
end
end
# Setup in preparation of communication with a U2F (universal 2nd factor) device
# Actual communication is performed using a Javascript API
def setup_u2f_authentication(user)
key_handles = user.u2f_registrations.pluck(:key_handle)
u2f = U2F::U2F.new(u2f_app_id)
if key_handles.present?
sign_requests = u2f.authentication_requests(key_handles)
challenges = sign_requests.map(&:challenge)
session[:challenges] = challenges
gon.push(u2f: { challenges: challenges, app_id: u2f_app_id,
sign_requests: sign_requests,
browser_supports_u2f: browser_supports_u2f? })
end
end
end