Filter incoming Announce activities by relation to local activity (#10041)

* Filter incoming Announce activities by relation to local activity

Reject if announcer is not followed by local accounts, and is not
from an enabled relay, and the object is not a local status

Follow-up to #10005

* Fix tests
This commit is contained in:
Eugen Rochko 2019-02-15 18:19:45 +01:00
parent ef45411c53
commit e84c761819
4 changed files with 25 additions and 13 deletions

View file

@ -138,11 +138,13 @@ class ActivityPub::Activity
def status_from_object
# If the status is already known, return it
status = status_from_uri(object_uri)
return status unless status.nil?
# If the boosted toot is embedded and it is a self-boost, handle it like a Create
unless unsupported_object_type?
actor_id = value_or_id(first_of_value(@object['attributedTo'])) || @account.uri
if actor_id == @account.uri
return ActivityPub::Activity.factory({ 'type' => 'Create', 'actor' => actor_id, 'object' => @object }, @account).perform
end
@ -166,4 +168,16 @@ class ActivityPub::Activity
ensure
redis.del(key)
end
def fetch?
!@options[:delivery]
end
def followed_by_local_accounts?
@account.passive_relationships.exists?
end
def requested_through_relay?
@options[:relayed_through_account] && Relay.find_by(inbox_url: @options[:relayed_through_account].inbox_url)&.enabled?
end
end

View file

@ -3,7 +3,8 @@
class ActivityPub::Activity::Announce < ActivityPub::Activity
def perform
original_status = status_from_object
return if original_status.nil? || delete_arrived_first?(@json['id']) || !announceable?(original_status)
return if original_status.nil? || delete_arrived_first?(@json['id']) || !announceable?(original_status) || !related_to_local_activity?
status = Status.find_by(account: @account, reblog: original_status)
@ -39,4 +40,12 @@ class ActivityPub::Activity::Announce < ActivityPub::Activity
def announceable?(status)
status.account_id == @account.id || status.public_visibility? || status.unlisted_visibility?
end
def related_to_local_activity?
followed_by_local_accounts? || requested_through_relay? || reblog_of_local_status?
end
def reblog_of_local_status?
status_from_uri(object_uri)&.account&.local?
end
end

View file

@ -341,18 +341,6 @@ class ActivityPub::Activity::Create < ActivityPub::Activity
responds_to_followed_account? || addresses_local_accounts?
end
def fetch?
!@options[:delivery]
end
def followed_by_local_accounts?
@account.passive_relationships.exists?
end
def requested_through_relay?
@options[:relayed_through_account] && Relay.find_by(inbox_url: @options[:relayed_through_account].inbox_url)&.enabled?
end
def responds_to_followed_account?
!replied_to_status.nil? && (replied_to_status.account.local? || replied_to_status.account.passive_relationships.exists?)
end

View file

@ -18,6 +18,7 @@ RSpec.describe ActivityPub::Activity::Announce do
subject { described_class.new(json, sender) }
before do
Fabricate(:account).follow!(sender)
sender.update(uri: ActivityPub::TagManager.instance.uri_for(sender))
end