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