Support public key URIs that incomprehensibly have GET args

Fixes #528

CHANGELOG.md

@@ -4,6 +4,11 @@ All notable changes to this project will be documented in this file.
 
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
+## Unreleased
+
+## Fixed
+- Support for `streams` public key URIs
+
 ## 2023.04
 
 ## Added

lib/pleroma/signature.ex

@@ -17,6 +17,7 @@ def key_id_to_actor_id(key_id) do
       key_id
       |> URI.parse()
       |> Map.put(:fragment, nil)
+      |> Map.put(:query, nil)
       |> remove_suffix(@known_suffixes)
 
     maybe_ap_id = URI.to_string(uri)

test/pleroma/signature_test.exs

@@ -114,6 +114,11 @@ test "it deduces the actor id for gotoSocial" do
                {:ok, "https://example.com/users/1234"}
     end
 
+    test "it deduces the actor ID for streams" do
+      assert Signature.key_id_to_actor_id("https://example.com/users/1234?operation=getkey") ==
+               {:ok, "https://example.com/users/1234"}
+    end
+
     test "it calls webfinger for 'acct:' accounts" do
       with_mock(Pleroma.Web.WebFinger,
         finger: fn _ -> {:ok, %{"ap_id" => "https://gensokyo.2hu/users/raymoo"}} end