mastodon/app/controllers/accounts_controller.rb
ThibG aecdaf5a8c Do not serve account actors at all in limited federation mode (#14800)
* Do not serve account actors at all in limited federation mode

When an account is fetched without a signature from an allowed instance,
return an error.

This isn't really an improvement in security, as the only information that was
previously returned was required protocol-level info, and the only personal bit
was the existence of the account. The existence of the account can still be
checked by issuing a webfinger query, as those are accepted without signatures.

However, this change makes it so that unallowed instances won't create account
records on their end when they find a reference to an unknown account.

The previous behavior of rendering a limited list of fields, instead of not
rendering the actor at all, was in order to prevent situations in which two
instances in Authorized Fetch mode or Limited Federation mode would fail to
reach each other because resolving an account would require a signed query…
from an account which can only be fetched with a signed query itself. However,
this should now be fine as fetching accounts is done by signing on behalf of
the special instance actor, which does not require any kind of valid signature
to be fetched.

* Fix tests
2020-10-19 14:45:12 +02:00

153 lines
4.3 KiB
Ruby

# frozen_string_literal: true
class AccountsController < ApplicationController
PAGE_SIZE = 20
PAGE_SIZE_MAX = 200
include AccountControllerConcern
include SignatureAuthentication
before_action :require_signature!, if: -> { request.format == :json && authorized_fetch_mode? }
before_action :set_cache_headers
before_action :set_body_classes
skip_around_action :set_locale, if: -> { [:json, :rss].include?(request.format&.to_sym) }
skip_before_action :require_functional!, unless: :whitelist_mode?
def show
respond_to do |format|
format.html do
expires_in 0, public: true unless user_signed_in?
@pinned_statuses = []
@endorsed_accounts = @account.endorsed_accounts.to_a.sample(4)
@featured_hashtags = @account.featured_tags.order(statuses_count: :desc)
if current_account && @account.blocking?(current_account)
@statuses = []
return
end
@pinned_statuses = cache_collection(@account.pinned_statuses, Status) if show_pinned_statuses?
@statuses = filtered_status_page
@statuses = cache_collection(@statuses, Status)
@rss_url = rss_url
unless @statuses.empty?
@older_url = older_url if @statuses.last.id > filtered_statuses.last.id
@newer_url = newer_url if @statuses.first.id < filtered_statuses.first.id
end
end
format.rss do
expires_in 1.minute, public: true
limit = params[:limit].present? ? [params[:limit].to_i, PAGE_SIZE_MAX].min : PAGE_SIZE
@statuses = filtered_statuses.without_reblogs.limit(limit)
@statuses = cache_collection(@statuses, Status)
render xml: RSS::AccountSerializer.render(@account, @statuses, params[:tag])
end
format.json do
expires_in 3.minutes, public: !(authorized_fetch_mode? && signed_request_account.present?)
render_with_cache json: @account, content_type: 'application/activity+json', serializer: ActivityPub::ActorSerializer, adapter: ActivityPub::Adapter
end
end
end
private
def set_body_classes
@body_classes = 'with-modals'
end
def show_pinned_statuses?
[replies_requested?, media_requested?, tag_requested?, params[:max_id].present?, params[:min_id].present?].none?
end
def filtered_statuses
default_statuses.tap do |statuses|
statuses.merge!(hashtag_scope) if tag_requested?
statuses.merge!(only_media_scope) if media_requested?
statuses.merge!(no_replies_scope) unless replies_requested?
end
end
def default_statuses
@account.statuses.where(visibility: [:public, :unlisted])
end
def only_media_scope
Status.where(id: account_media_status_ids)
end
def account_media_status_ids
@account.media_attachments.attached.reorder(nil).select(:status_id).distinct
end
def no_replies_scope
Status.without_replies
end
def hashtag_scope
tag = Tag.find_normalized(params[:tag])
if tag
Status.tagged_with(tag.id)
else
Status.none
end
end
def username_param
params[:username]
end
def rss_url
if tag_requested?
short_account_tag_url(@account, params[:tag], format: 'rss')
else
short_account_url(@account, format: 'rss')
end
end
def older_url
pagination_url(max_id: @statuses.last.id)
end
def newer_url
pagination_url(min_id: @statuses.first.id)
end
def pagination_url(max_id: nil, min_id: nil)
if tag_requested?
short_account_tag_url(@account, params[:tag], max_id: max_id, min_id: min_id)
elsif media_requested?
short_account_media_url(@account, max_id: max_id, min_id: min_id)
elsif replies_requested?
short_account_with_replies_url(@account, max_id: max_id, min_id: min_id)
else
short_account_url(@account, max_id: max_id, min_id: min_id)
end
end
def media_requested?
request.path.split('.').first.ends_with?('/media') && !tag_requested?
end
def replies_requested?
request.path.split('.').first.ends_with?('/with_replies') && !tag_requested?
end
def tag_requested?
request.path.split('.').first.ends_with?(Addressable::URI.parse("/tagged/#{params[:tag]}").normalize)
end
def filtered_status_page
filtered_statuses.paginate_by_id(PAGE_SIZE, params_slice(:max_id, :min_id, :since_id))
end
def params_slice(*keys)
params.slice(*keys).permit(*keys)
end
end