91 lines
		
	
	
		
			2.6 KiB
		
	
	
	
		
			Ruby
		
	
	
	
			
		
		
	
	
			91 lines
		
	
	
		
			2.6 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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  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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    user = self.resource = find_user
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    if user.present? && session[:attempt_user_id].present? && 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) && session[:attempt_user_id]
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      authenticate_with_two_factor_via_webauthn(user)
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    elsif user_params.key?(:otp_attempt) && session[:attempt_user_id]
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      authenticate_with_two_factor_via_otp(user)
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    elsif user.present? && user.external_or_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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  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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      clear_attempt_from_session
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      remember_me(user)
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      sign_in(user)
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      render json: { redirect_path: root_path }, status: :ok
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    else
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      render json: { error: t('webauthn_credentials.invalid_credential') }, status: :unprocessable_entity
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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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      clear_attempt_from_session
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      remember_me(user)
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      sign_in(user)
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    else
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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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    set_attempt_session(user)
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    @body_classes     = 'lighter'
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    @webauthn_enabled = user.webauthn_enabled?
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    @scheme_type      = begin
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      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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    end
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    set_locale { render :two_factor }
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  end
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end
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