scripts/signrom: remove Python 2 support, add shebang
Cc: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20200204160028.16211-1-pbonzini@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
diff --git a/scripts/signrom.py b/scripts/signrom.py
index 313ee28..9be5dab 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 @@
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()