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