98 lines
		
	
	
		
			2.9 KiB
		
	
	
	
		
			Ruby
		
	
	
	
			
		
		
	
	
			98 lines
		
	
	
		
			2.9 KiB
		
	
	
	
		
			Ruby
		
	
	
	
# frozen_string_literal: true
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module TwoFactorAuthenticationConcern
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  extend ActiveSupport::Concern
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  included do
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    prepend_before_action :authenticate_with_two_factor, if: :two_factor_enabled?, only: [:create]
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    helper_method :webauthn_enabled?
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  end
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  def two_factor_enabled?
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    find_user&.two_factor_enabled?
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  end
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  def valid_webauthn_credential?(user, webauthn_credential)
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    user_credential = user.webauthn_credentials.find_by!(external_id: webauthn_credential.id)
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    begin
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      webauthn_credential.verify(
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        session[:webauthn_challenge],
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        public_key: user_credential.public_key,
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        sign_count: user_credential.sign_count
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      )
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      user_credential.update!(sign_count: webauthn_credential.sign_count)
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    rescue WebAuthn::Error
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      false
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    end
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  end
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  def valid_otp_attempt?(user)
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    user.validate_and_consume_otp!(user_params[:otp_attempt]) ||
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      user.invalidate_otp_backup_code!(user_params[:otp_attempt])
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  rescue OpenSSL::Cipher::CipherError
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    false
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  end
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  def authenticate_with_two_factor
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    if user_params[:email].present?
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      user = self.resource = find_user_from_params
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      prompt_for_two_factor(user) if user&.external_or_valid_password?(user_params[:password])
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    elsif session[:attempt_user_id]
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      user = self.resource = User.find_by(id: session[:attempt_user_id])
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      return if user.nil?
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      if session[:attempt_user_updated_at] != user.updated_at.to_s
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        restart_session
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      elsif user.webauthn_enabled? && user_params.key?(:credential)
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        authenticate_with_two_factor_via_webauthn(user)
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      elsif user_params.key?(:otp_attempt)
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        authenticate_with_two_factor_via_otp(user)
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      end
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    end
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  end
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  def authenticate_with_two_factor_via_webauthn(user)
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    webauthn_credential = WebAuthn::Credential.from_get(user_params[:credential])
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    if valid_webauthn_credential?(user, webauthn_credential)
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      on_authentication_success(user, :webauthn)
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      render json: { redirect_path: after_sign_in_path_for(user) }, status: 200
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    else
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      on_authentication_failure(user, :webauthn, :invalid_credential)
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      render json: { error: t('webauthn_credentials.invalid_credential') }, status: 422
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    end
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  end
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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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      on_authentication_success(user, :otp)
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    else
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      on_authentication_failure(user, :otp, :invalid_otp_token)
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      flash.now[:alert] = I18n.t('users.invalid_otp_token')
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      prompt_for_two_factor(user)
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    end
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  end
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  def prompt_for_two_factor(user)
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    register_attempt_in_session(user)
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    @body_classes     = 'lighter'
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    @webauthn_enabled = user.webauthn_enabled?
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    @scheme_type      = if user.webauthn_enabled? && user_params[:otp_attempt].blank?
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                          'webauthn'
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                        else
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                          'totp'
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                        end
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    set_locale { render :two_factor }
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  end
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  protected
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  def webauthn_enabled?
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    @webauthn_enabled
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  end
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end
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