From f37db1f3b10f85adfa6d71ef40b61685e25f431b Mon Sep 17 00:00:00 2001
From: Mathieu Tortuyaux <mtortuyaux@microsoft.com>
Date: Fri, 15 Dec 2023 10:10:28 +0100
Subject: [PATCH] core_sign_update: use version 2 if only 1 key is provided

Signed-off-by: Mathieu Tortuyaux <mtortuyaux@microsoft.com>
---
 core_sign_update | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/core_sign_update b/core_sign_update
index 065b64ad0a..cce8aad503 100755
--- a/core_sign_update
+++ b/core_sign_update
@@ -163,8 +163,13 @@ delta_generator --signature_file ${files} --in_file update --out_file update.sig
 
 i=1
 for key in "${public_keys[@]}"; do
+	version="${i}"
+	if [ ${#public_keys[@]} == 1 ]; then
+		version=2
+	fi
+
 	delta_generator \
-		--public_key_version "${i}" \
+		--public_key_version "${version}" \
 		--public_key "${key}" \
 		--in_file update.signed