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* [PATCH] scripts/signrom: remove Python 2 support, add shebang
@ 2020-02-04 16:00 Paolo Bonzini
  2020-02-04 16:02 ` Philippe Mathieu-Daudé
  0 siblings, 1 reply; 6+ messages in thread
From: Paolo Bonzini @ 2020-02-04 16:00 UTC (permalink / raw)
  To: qemu-devel; +Cc: Philippe Mathieu-Daudé

Based-on: <20200130163232.10446-1-philmd@redhat.com>
Cc: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 scripts/signrom.py | 12 ++++--------
 1 file changed, 4 insertions(+), 8 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
-
-# Python 3 no longer allows chr(checksum)
+    checksum = (checksum - b) & 255
+
 fout.write(struct.pack('B', checksum))
 
 fin.close()
-- 
2.21.0



^ permalink raw reply related	[flat|nested] 6+ messages in thread
* [PATCH] scripts/signrom: remove Python 2 support, add shebang
@ 2020-02-04 15:58 Paolo Bonzini
  0 siblings, 0 replies; 6+ messages in thread
From: Paolo Bonzini @ 2020-02-04 15:58 UTC (permalink / raw)
  To: qemu-devel; +Cc: philmd

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 scripts/signrom.py | 12 ++++--------
 1 file changed, 4 insertions(+), 8 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
-
-# Python 3 no longer allows chr(checksum)
+    checksum = (checksum - b) & 255
+
 fout.write(struct.pack('B', checksum))
 
 fin.close()
-- 
2.21.0



^ permalink raw reply related	[flat|nested] 6+ messages in thread

end of thread, other threads:[~2020-02-04 16:19 UTC | newest]

Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
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2020-02-04 16:00 [PATCH] scripts/signrom: remove Python 2 support, add shebang Paolo Bonzini
2020-02-04 16:02 ` Philippe Mathieu-Daudé
2020-02-04 16:07   ` Paolo Bonzini
2020-02-04 16:11     ` Philippe Mathieu-Daudé
2020-02-04 16:18       ` Paolo Bonzini
  -- strict thread matches above, loose matches on Subject: below --
2020-02-04 15:58 Paolo Bonzini

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