From: Paolo Bonzini <pbonz...@redhat.com>
Cc: Philippe Mathieu-Daudé <phi...@redhat.com>
Signed-off-by: Paolo Bonzini <pbonz...@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <phi...@redhat.com>
Message-Id: <20200204160028.16211-1-pbonz...@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <phi...@redhat.com>
---
scripts/signrom.py | 10 +++-------
1 file changed, 3 insertions(+), 7 deletions(-)
diff --git a/scripts/signrom.py b/scripts/signrom.py
index 313ee28a17..9be5dab1cf 100644
--- a/scripts/signrom.py
+++ b/scripts/signrom.py
@@ -1,3 +1,5 @@
+#!/usr/bin/env python3
+
from __future__ import print_function
#
# Option ROM signing utility
@@ -44,14 +46,8 @@ fout.write(data)
checksum = 0
for b in data:
- # catch Python 2 vs. 3 differences
- if isinstance(b, int):
- checksum += b
- else:
- checksum += ord(b)
-checksum = (256 - checksum) % 256
+ checksum = (checksum - b) & 255
-# Python 3 no longer allows chr(checksum)
fout.write(struct.pack('B', checksum))
fin.close()
--
2.21.1
