From c0831c884b5af49f02df63a057fa11840e3da207 Mon Sep 17 00:00:00 2001
From: Laura Hausmann <laura@hausmann.dev>
Date: Sat, 17 Feb 2024 17:54:49 +0100
Subject: [PATCH] [backend/core] Correctly serialize http signature signing
 string for headers that occur more than once

---
 Iceshrimp.Backend/Core/Federation/Cryptography/HttpSignature.cs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Iceshrimp.Backend/Core/Federation/Cryptography/HttpSignature.cs b/Iceshrimp.Backend/Core/Federation/Cryptography/HttpSignature.cs
index 4002b218..eebcd72f 100644
--- a/Iceshrimp.Backend/Core/Federation/Cryptography/HttpSignature.cs
+++ b/Iceshrimp.Backend/Core/Federation/Cryptography/HttpSignature.cs
@@ -113,7 +113,7 @@ public static class HttpSignature
 			{
 				"(request-target)" => $"{requestMethod.ToLowerInvariant()} {requestPath}",
 				"host"             => $"{host ?? requestHeaders[header]}",
-				_                  => requestHeaders[header]
+				_                  => string.Join(", ", requestHeaders[header].AsEnumerable())
 			});
 		}