From bf47b71b787657eca1d489f92517aa60c9a38008 Mon Sep 17 00:00:00 2001
From: Paul Sokolovsky <pfalcon@users.sourceforge.net>
Date: Thu, 4 Aug 2016 00:21:05 +0300
Subject: [PATCH] esp8266/makeimg.py: Append md5 hash to the generated binary.
md5 is calculated over the entire file, except first 4 bytes, which contain
flash parameters and may be changed by flashing tool or MicroPython flash
auto-config.
---
esp8266/makeimg.py | 15 ++++++++++++++-
1 file changed, 14 insertions(+), 1 deletion(-)
diff --git a/esp8266/makeimg.py b/esp8266/makeimg.py
index 834f778c8..091854fa4 100644
--- a/esp8266/makeimg.py
+++ b/esp8266/makeimg.py
@@ -1,15 +1,21 @@
import sys
import struct
+import hashlib
SEGS_MAX_SIZE = 0x9000
assert len(sys.argv) == 4
+md5 = hashlib.md5()
+
with open(sys.argv[3], 'wb') as fout:
with open(sys.argv[1], 'rb') as f:
data_flash = f.read()
fout.write(data_flash)
+ # First 4 bytes include flash size, etc. which may be changed
+ # by esptool.py, etc.
+ md5.update(data_flash[4:])
print('flash ', len(data_flash))
with open(sys.argv[2], 'rb') as f:
@@ -18,10 +24,17 @@ with open(sys.argv[3], 'wb') as fout:
pad = b'\xff' * (SEGS_MAX_SIZE - len(data_flash))
assert len(pad) >= 4
fout.write(pad[:-4])
- fout.write(struct.pack("I", SEGS_MAX_SIZE + len(data_rom)))
+ md5.update(pad[:-4])
+ len_data = struct.pack("I", SEGS_MAX_SIZE + len(data_rom))
+ fout.write(len_data)
+ md5.update(len_data)
print('padding ', len(pad))
fout.write(data_rom)
+ md5.update(data_rom)
print('irom0text', len(data_rom))
+ fout.write(md5.digest())
+
print('total ', SEGS_MAX_SIZE + len(data_rom))
+ print('md5 ', md5.hexdigest())
--
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