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fix: dont trust activities' object ids, fetch them

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implies that its no longer possible to like/announce/accept anything
that the server isnt aware of yet, which i think is fair

thanks sn0w good catch <3
This commit is contained in:
əlemi 2024-05-20 01:08:24 +02:00
parent 8b15ae9f4f
commit 9105f73921
Signed by: alemi
GPG key ID: A4895B84D311642C
1 changed files with 12 additions and 7 deletions
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19
src/server/inbox.rs
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@ -94,10 +94,9 @@ impl apb::server::Inbox for Context {
async fn like(&self, _: String, activity: serde_json::Value) -> crate::Result<()> {
let aid = activity.id().ok_or(UpubError::bad_request())?;
let uid = activity.actor().id().ok_or(UpubError::bad_request())?;
let oid = activity.object().id().ok_or(UpubError::bad_request())?;
if let Err(e) = self.fetch_object(&oid).await {
tracing::warn!("failed fetching liked object: {e}");
}
let object_uri = activity.object().id().ok_or(UpubError::bad_request())?;
let obj = self.fetch_object(&object_uri).await?;
let oid = obj.id;
let like = model::like::ActiveModel {
id: sea_orm::ActiveValue::NotSet,
actor: sea_orm::Set(uid.clone()),
@ -143,10 +142,12 @@ impl apb::server::Inbox for Context {
async fn follow(&self, _: String, activity: serde_json::Value) -> crate::Result<()> {
let activity_model = model::activity::Model::new(&activity)?;
let aid = activity_model.id.clone();
let target_user_id = activity_model.object
let target_user_uri = activity_model.object
.as_deref()
.ok_or_else(UpubError::bad_request)?
.to_string();
let usr = self.fetch_user(&target_user_uri).await?;
let target_user_id = usr.id;
tracing::info!("{} wants to follow {}", activity_model.actor, target_user_id);
model::activity::Entity::insert(activity_model.into_active_model())
.exec(self.db()).await?;
@ -327,6 +328,9 @@ impl apb::server::Inbox for Context {
return Err(UpubError::forbidden());
};
let obj = self.fetch_object(&undone_object_uri).await?;
let undone_object_id = obj.id;
match activity_type {
apb::ActivityType::Like => {
model::like::Entity::delete_many()
@ -367,10 +371,11 @@ impl apb::server::Inbox for Context {
async fn announce(&self, _: String, activity: serde_json::Value) -> crate::Result<()> {
let activity_model = model::activity::Model::new(&activity)?;
let Some(oid) = &activity_model.object else {
let Some(object_uri) = &activity_model.object else {
return Err(FieldError("object").into());
};
self.fetch_object(oid).await?;
let obj = self.fetch_object(object_uri).await?;
let oid = obj.id;
// relays send us activities as Announce, but we don't really want to count those towards the
// total shares count of an object, so just fetch the object and be done with it