From 2181d01e542af1d841d93799f1bd3a84418bf7eb Mon Sep 17 00:00:00 2001
From: Laura Hausmann <laura@hausmann.dev>
Date: Tue, 13 Aug 2024 00:02:21 +0200
Subject: [PATCH] [backend/federation] Reject activities by suspended users

---
 .../Core/Federation/ActivityPub/ActivityHandlerService.cs      | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Iceshrimp.Backend/Core/Federation/ActivityPub/ActivityHandlerService.cs b/Iceshrimp.Backend/Core/Federation/ActivityPub/ActivityHandlerService.cs
index e529cf62..fc06a46f 100644
--- a/Iceshrimp.Backend/Core/Federation/ActivityPub/ActivityHandlerService.cs
+++ b/Iceshrimp.Backend/Core/Federation/ActivityPub/ActivityHandlerService.cs
@@ -58,6 +58,9 @@ public class ActivityHandlerService(
 
 		UpdateInstanceMetadataInBackground(resolvedActor.Host, new Uri(resolvedActor.Uri).Host);
 
+		if (resolvedActor.IsSuspended && activity is not ASDelete)
+			throw GracefulException.UnprocessableEntity("Actor is suspended");
+
 		var inboxUser = inboxUserId != null
 			? await db.Users.IncludeCommonProperties().FirstOrDefaultAsync(p => p.Id == inboxUserId)
 			: null;