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Dell HDR Module Extractor v2.0

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Fixed issue which caused some HDR executables to extract less modules than expected
This commit is contained in:
Plato Mavropoulos 2018-09-22 14:46:07 +03:00
parent dcb2aad30e
commit 09c02caa9a
2 changed files with 26 additions and 34 deletions
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56
Dell HDR Module Extractor/Dell_HDR_Extract.py
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@ -7,7 +7,7 @@ Copyright (C) 2018 Plato Mavropoulos
Inspired from https://forums.mydigitallife.net/threads/i-present-you-a-tool-to-decompress-dell-uefi-bios.44785/ by JimboBobB
"""
print('Dell HDR Module Extractor v1.1\n')
print('Dell HDR Module Extractor v2.0\n')
import os
import re
@ -35,45 +35,35 @@ for input_file in hdr_exec :
with open(input_file, 'rb') as in_file : bios_data = in_file.read()
# Compressed Dell HDR pattern followed by the zlib header of 0x789C
pat_hdr = re.compile(br'\xAA\xEE\xAA\x76\x1B\xEC\xBB\x20\xF1\xE6\x51.\x78\x9C', re.DOTALL)
match_hdr = pat_hdr.search(bios_data)
match_hdr = re.compile(br'\xAA\xEE\xAA\x76\x1B\xEC\xBB\x20\xF1\xE6\x51.\x78\x9C', re.DOTALL).search(bios_data)
# Check if Compressed Dell HDR pattern was found
# Check if compressed Dell HDR pattern was found
if not match_hdr :
print('\n Error: No Dell HDR found at %s%s!' % (input_name, input_extension))
continue # Next input file
# Detected Compressed Dell HDR pattern
while match_hdr :
# Store the compressed zlib data size from the proceeding 4 bytes of the Dell HDR pattern
compressed_size = int.from_bytes(bios_data[match_hdr.start() - 0x4:match_hdr.start()], 'little')
# Store the compressed zlib data size from the proceeding 4 bytes of the Dell HDR pattern
compressed_size = int.from_bytes(bios_data[match_hdr.start() - 0x4:match_hdr.start()], 'little')
# Decompress zlib payload from 0x789C via Python
decomp_data = zlib.decompress(bios_data[match_hdr.start() + 0xC:match_hdr.start() + 0xC + compressed_size])
output_name = input_name + '.hdr'
with open(output_name, 'wb') as hdr_file : hdr_file.write(decomp_data)
print('\n Decompressed %s%s via Python' % (input_name, input_extension))
# Extract the Dell HDR image via LongSoft's PFSExtractor-RS
try :
subprocess.run(['PFSExtractor', output_name], check = True, stdout = subprocess.DEVNULL)
# Store compressed zlib data
compressed_data = bios_data[match_hdr.start() + 0xC:match_hdr.start() + 0xC + compressed_size]
if os.path.isfile(output_name) : os.remove(output_name)
# Decompress zlib payload
bios_data = zlib.decompress(compressed_data)
# Scan for nested zlib data streams
match_hdr = pat_hdr.search(bios_data)
else :
output_name = input_name + '.hdr'
with open(output_name, 'wb') as hdr_file : hdr_file.write(bios_data)
print('\n Decompressed %s%s via Python' % (input_name, input_extension))
# Call LongSoft's PFSExtractor-RS to extract the Dell HDR container
try :
subprocess.run(['PFSExtractor', output_name], check = True, stdout = subprocess.DEVNULL)
if os.path.isfile(output_name) : os.remove(output_name)
print(' Extracted %s via PFSExtractor-RS' % output_name)
except :
print(' Error: Could not extract %s via PFSExtractor-RS!' % output_name)
print(' Make sure that "PFSExtractor" executable exists!')
print(' Extracted %s via PFSExtractor-RS' % output_name)
except :
print(' Error: Could not extract %s via PFSExtractor-RS!' % output_name)
print(' Make sure that "PFSExtractor" executable exists!')
else :
input('\nDone!')