Support more variations of ActivityPub keyId in signature (#4630)

- Tries to avoid performing HTTP request if the keyId is an actor URI
- Likewise if the URI is a fragment URI on top of actor URI
- Resolves public key, returns owner if the owner links back to the key

3 files changed, 3 insertions, 3 deletions

diff --git a/app/lib/activitypub/activity/accept.rb b/app/lib/activitypub/activity/accept.rb
index 44c432ae7..bd90c9019 100644
--- a/app/lib/activitypub/activity/accept.rb
+++ b/app/lib/activitypub/activity/accept.rb
@@ -20,6 +20,6 @@ class ActivityPub::Activity::Accept < ActivityPub::Activity
   end
 
   def target_uri
-    @target_uri ||= @object['actor']
+    @target_uri ||= value_or_id(@object['actor'])
   end
 end
diff --git a/app/lib/activitypub/activity/reject.rb b/app/lib/activitypub/activity/reject.rb
index 6a234994e..d815feeb6 100644
--- a/app/lib/activitypub/activity/reject.rb
+++ b/app/lib/activitypub/activity/reject.rb
@@ -20,6 +20,6 @@ class ActivityPub::Activity::Reject < ActivityPub::Activity
   end
 
   def target_uri
-    @target_uri ||= @object['actor']
+    @target_uri ||= value_or_id(@object['actor'])
   end
 end
diff --git a/app/lib/activitypub/activity/undo.rb b/app/lib/activitypub/activity/undo.rb
index 078e97ed4..097b1dba4 100644
--- a/app/lib/activitypub/activity/undo.rb
+++ b/app/lib/activitypub/activity/undo.rb
@@ -64,6 +64,6 @@ class ActivityPub::Activity::Undo < ActivityPub::Activity
   end
 
   def target_uri
-    @target_uri ||= @object['object'].is_a?(String) ? @object['object'] : @object['object']['id']
+    @target_uri ||= value_or_id(@object['object'])
   end
 end