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https://github.com/platomav/BIOSUtilities.git
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Fujitsu UPC BIOS Extractor v1.0 Parses Fujitsu UPC images and extracts their Tiano compressed SPI/BIOS firmware component. The output comprises only a final firmware component which is directly usable by end users. Fujitsu SFX BIOS Extractor v2.1 Small rebranding
82 lines
No EOL
2.8 KiB
Python
82 lines
No EOL
2.8 KiB
Python
#!/usr/bin/env python3
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"""
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Fujitsu SFX Extractor
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Fujitsu SFX BIOS Extractor
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Copyright (C) 2019-2021 Plato Mavropoulos
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"""
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print('Fujitsu SFX BIOS Extractor v2.1')
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import os
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import re
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import sys
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import subprocess
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if len(sys.argv) >= 2 :
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# Drag & Drop or CLI
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fjsfx_exec = sys.argv[1:]
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else :
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# Folder path
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fjsfx_exec = []
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in_path = input('\nEnter the full folder path: ')
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print('\nWorking...')
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for root, dirs, files in os.walk(in_path):
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for name in files :
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fjsfx_exec.append(os.path.join(root, name))
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# "FjSfxBinay" + Microsoft CAB Header XOR 0xFF (Tag[4] + Res[4] + Size[4] + Res[4] + Offset[4] + Res[4] + Ver[2]) pattern
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mscf_pattern = re.compile(br'\x46\x6A\x53\x66\x78\x42\x69\x6E\x61\x79\xB2\xAC\xBC\xB9\xFF{4}.{4}\xFF{4}.{4}\xFF{4}\xFC\xFE', re.DOTALL)
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for input_file in fjsfx_exec :
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file_path = os.path.abspath(input_file)
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file_dir = os.path.dirname(file_path)
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file_name = os.path.basename(file_path)
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print('\nFile: ' + file_name)
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# Open Fujitsu SFX Binary Packager executable as mutable bytearray
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with open(input_file, 'rb') as in_file : FjSfx = bytearray(in_file.read())
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match_mscf = mscf_pattern.search(FjSfx) # Search for Fujitsu Microsoft CAB Header XOR 0xFF pattern
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# Check if Microsoft CAB Header XOR 0xFF pattern exists
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if match_mscf :
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print('\n Detected Obfuscation!')
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mscf_start = match_mscf.start() + 0xA # Microsoft CAB Header XOR 0xFF starts after "FjSfxBinay" signature
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# Determine the Microsoft CAB image Size
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cab_size = int.from_bytes(FjSfx[mscf_start + 0x8:mscf_start + 0xC], 'little') # Get LE XOR-ed CAB Size
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xor_size = int.from_bytes(b'\xFF' * 0x4, 'little') # Create CAB Size XOR value
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cab_size = cab_size ^ xor_size # Perform XOR 0xFF and get actual CAB Size
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print('\n Removing Obfuscation...')
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# Determine the Microsoft CAB image Data
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cab_data = int.from_bytes(FjSfx[mscf_start:mscf_start + cab_size], 'big') # Get BE XOR-ed CAB Data
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xor_data = int.from_bytes(b'\xFF' * cab_size, 'big') # Create CAB Data XOR value
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cab_data = (cab_data ^ xor_data).to_bytes(cab_size, 'big') # Perform XOR 0xFF and get actual CAB Data
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print('\n Extracting...')
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with open('fjsfx_temp.cab', 'wb') as cab_file : cab_file.write(cab_data) # Create temporary CAB image
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extr_path = os.path.join(file_dir, file_name[:-4], '') # Create CAB image extraction path
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try :
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decomp = subprocess.run(['7z', 'x', '-aou', '-bso0', '-bse0', '-bsp0', '-o' + extr_path, 'fjsfx_temp.cab']) # 7-Zip
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print('\n Extracted!')
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except :
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print('\n Error: Could not decompress Microsoft CAB image!')
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print(' Make sure that "7z" executable exists!')
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os.remove('fjsfx_temp.cab') # Remove temporary CAB image
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else :
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print('\n Error: This is not a Fujitsu SFX BIOS image!')
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continue # Next input file
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else :
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input('\nDone!') |