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-rw-r--r--app/controllers/activitypub/inboxes_controller.rb4
-rw-r--r--app/controllers/api/salmon_controller.rb6
-rw-r--r--app/controllers/concerns/signature_verification.rb9
3 files changed, 15 insertions, 4 deletions
diff --git a/app/controllers/activitypub/inboxes_controller.rb b/app/controllers/activitypub/inboxes_controller.rb
index d0f8073ed..76553a162 100644
--- a/app/controllers/activitypub/inboxes_controller.rb
+++ b/app/controllers/activitypub/inboxes_controller.rb
@@ -9,9 +9,9 @@ class ActivityPub::InboxesController < Api::BaseController
     if signed_request_account
       upgrade_account
       process_payload
-      head 201
-    else
       head 202
+    else
+      [signature_verification_failure_reason, 401]
     end
   end
 
diff --git a/app/controllers/api/salmon_controller.rb b/app/controllers/api/salmon_controller.rb
index e9e700b18..143e9d3cd 100644
--- a/app/controllers/api/salmon_controller.rb
+++ b/app/controllers/api/salmon_controller.rb
@@ -7,9 +7,11 @@ class Api::SalmonController < Api::BaseController
   def update
     if verify_payload?
       process_salmon
-      head 201
-    else
       head 202
+    elsif payload.present?
+      [signature_verification_failure_reason, 401]
+    else
+      head 400
     end
   end
 
diff --git a/app/controllers/concerns/signature_verification.rb b/app/controllers/concerns/signature_verification.rb
index 52a9cf290..dc2d9a678 100644
--- a/app/controllers/concerns/signature_verification.rb
+++ b/app/controllers/concerns/signature_verification.rb
@@ -9,10 +9,15 @@ module SignatureVerification
     request.headers['Signature'].present?
   end
 
+  def signature_verification_failure_reason
+    return @signature_verification_failure_reason if defined?(@signature_verification_failure_reason)
+  end
+
   def signed_request_account
     return @signed_request_account if defined?(@signed_request_account)
 
     unless signed_request?
+      @signature_verification_failure_reason = 'Request not signed'
       @signed_request_account = nil
       return
     end
@@ -27,6 +32,7 @@ module SignatureVerification
     end
 
     if incompatible_signature?(signature_params)
+      @signature_verification_failure_reason = 'Incompatible request signature'
       @signed_request_account = nil
       return
     end
@@ -34,6 +40,7 @@ module SignatureVerification
     account = account_from_key_id(signature_params['keyId'])
 
     if account.nil?
+      @signature_verification_failure_reason = "Public key not found for key #{signature_params['keyId']}"
       @signed_request_account = nil
       return
     end
@@ -51,9 +58,11 @@ module SignatureVerification
         @signed_request_account = account
         @signed_request_account
       else
+        @signed_verification_failure_reason = "Verification failed for #{account.username}@#{account.domain} #{account.uri}"
         @signed_request_account = nil
       end
     else
+      @signed_verification_failure_reason = "Verification failed for #{account.username}@#{account.domain} #{account.uri}"
       @signed_request_account = nil
     end
   end