Commit bf47b71b authored by Paul Sokolovsky's avatar Paul Sokolovsky
Browse files

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.
parent a621333a
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())
Supports Markdown
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment