blob: 42bb05c1c728f1c0d746b1047fbd8b61342d3622 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
|
From 47c561cfa7b3970608543f8f2cb7d08b2d1e0e4d Mon Sep 17 00:00:00 2001
From: Ron Nazarov <ron@noisytoot.org>
Date: Sat, 14 Feb 2026 19:05:18 +0000
Subject: [PATCH 3/4] lib/image.py: Disable $FPT checksum check
I don't actually understand what this does, but it doesn't seem to be
doing anything useful. It seems to be just checking that some range
of bytes is all zero, which isn't a checksum.
On my OptiPlex 5050 SFF image (which passes), this range of bytes is
empty, because self.data[self.HDRLEN_OFF] is 0. On my Supermicro
X11SSH-F/LN4F image, self.data[self.HDRLEN_OFF] is 19, which means
that self.data[self.HEADER_OFF:self.data[self.HDRLEN_OFF]] is
bytearray(b'$FP'), which makes the check fail.
Without this check, it can generate a working delta for the Supermicro
X11SSH-F/LN4F.
Change-Id: I16735676fd4ae2a4e065886aeb7a06cead721cdf
Signed-off-by: Ron Nazarov <ron@noisytoot.org>
---
lib/image.py | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/lib/image.py b/lib/image.py
index 21db448..e303e8f 100644
--- a/lib/image.py
+++ b/lib/image.py
@@ -84,8 +84,8 @@ class MeImage:
# Verify magic and checksum
if self.data[self.MARKER_OFF:self.MARKER_OFF+4] != self.MARKER:
raise ValueError("Invalid $FPT magic")
- if sum(self.data[self.HEADER_OFF:self.data[self.HDRLEN_OFF]]) != 0:
- raise ValueError("Invalid $FPT checksum")
+ # if sum(self.data[self.HEADER_OFF:self.data[self.HDRLEN_OFF]]) != 0:
+ # raise ValueError("Invalid $FPT checksum")
# Parse entries
self.entries = {}
--
2.52.0
|
