From 32977762404cf6fd5ed0f455f370080dfc454c33 Mon Sep 17 00:00:00 2001
From: Christian Schaible <christian.schaible@novatec-gmbh.de>
Date: Mon, 9 Sep 2024 15:02:51 +0200
Subject: [PATCH] Add fallback to lowercase authoriation header lookup

---
 audit/api/model.go | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/audit/api/model.go b/audit/api/model.go
index 4e80019..e3f9e69 100644
--- a/audit/api/model.go
+++ b/audit/api/model.go
@@ -617,6 +617,10 @@ func AuditAttributesFromAuthorizationHeader(request *Request) (
 	var delegationInfo []*auditV1.ServiceAccountDelegationInfo = nil
 
 	authorizationHeaders := request.Header["Authorization"]
+	if len(authorizationHeaders) == 0 {
+		// fallback for grpc where headers/metadata keys are lowercase
+		authorizationHeaders = request.Header["authorization"]
+	}
 	authorizationHeader := strings.Join(authorizationHeaders, ",")
 	trimmedAuthorizationHeader := strings.TrimSpace(authorizationHeader)
 	if len(trimmedAuthorizationHeader) > 0 {