mirror of
https://github.com/platomav/BIOSUtilities.git
synced 2025-05-22 19:25:21 -04:00
cda2fbd0b1
Complete repository overhaul into python project Re-designed BIOSUtility base template class flow Re-structured utilities as BIOSUtility inherited Re-structured project for 3rd-party compatibility Unified project requirements and package version Code overhaul with type hints and linting support Switched external executable dependencies via PATH BIOSUtility enforces simple check and parse methods Utilities now work with both path and buffer inputs Adjusted class, method, function names and parameters Improved Dell PFS Update Extractor sub-PFAT processing Improved Award BIOS Module Extractor corruption handling Improved Apple EFI Image Identifier to expose the EFI ID Improved Insyde iFlash/iFdPacker Extractor with ISH & PDT Re-written Apple EFI Package Extractor to support all PKG
92 lines
3 KiB
Python
92 lines
3 KiB
Python
#!/usr/bin/env python3 -B
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# coding=utf-8
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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) 2019-2024 Plato Mavropoulos
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"""
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import os
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import re
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from biosutilities.common.compression import is_szip_supported, szip_decompress
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from biosutilities.common.paths import make_dirs
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from biosutilities.common.patterns import PAT_FUJITSU_SFX
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from biosutilities.common.system import printer
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from biosutilities.common.templates import BIOSUtility
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from biosutilities.common.texts import file_to_bytes
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class FujitsuSfxExtract(BIOSUtility):
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""" Fujitsu SFX BIOS Extractor """
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TITLE: str = 'Fujitsu SFX BIOS Extractor'
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def check_format(self, input_object: str | bytes | bytearray) -> bool:
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""" Check if input is Fujitsu SFX image """
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input_buffer: bytes = file_to_bytes(in_object=input_object)
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return bool(PAT_FUJITSU_SFX.search(string=input_buffer))
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def parse_format(self, input_object: str | bytes | bytearray, extract_path: str, padding: int = 0) -> int:
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""" Parse & Extract Fujitsu SFX image """
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input_buffer: bytes = file_to_bytes(in_object=input_object)
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# Microsoft CAB Header XOR 0xFF
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match_cab: re.Match[bytes] | None = PAT_FUJITSU_SFX.search(string=input_buffer)
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if not match_cab:
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return 1
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printer(message='Detected obfuscated CAB archive!', padding=padding)
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# Microsoft CAB Header XOR 0xFF starts after "FjSfxBinay" signature
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cab_start: int = match_cab.start() + 0xA
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# Get LE XOR-ed CAB size
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cab_size: int = int.from_bytes(bytes=input_buffer[cab_start + 0x8:cab_start + 0xC], byteorder='little')
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# Create CAB size XOR value
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xor_size: int = int.from_bytes(bytes=b'\xFF' * 0x4, byteorder='little')
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# Perform XOR 0xFF and get actual CAB size
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cab_size ^= xor_size
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printer(message='Removing obfuscation...', padding=padding + 4)
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# Get BE XOR-ed CAB data
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cab_data: int = int.from_bytes(bytes=input_buffer[cab_start:cab_start + cab_size], byteorder='big')
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# Create CAB data XOR value
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xor_data: int = int.from_bytes(bytes=b'\xFF' * cab_size, byteorder='big')
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# Perform XOR 0xFF and get actual CAB data
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raw_data: bytes = (cab_data ^ xor_data).to_bytes(cab_size, 'big')
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printer(message='Extracting archive...', padding=padding + 4)
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make_dirs(in_path=extract_path, delete=True)
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cab_path: str = os.path.join(extract_path, 'FjSfxBinay.cab')
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# Create temporary CAB archive
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with open(file=cab_path, mode='wb') as cab_file_object:
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cab_file_object.write(raw_data)
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if is_szip_supported(in_path=cab_path, padding=padding + 8, silent=False):
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if szip_decompress(in_path=cab_path, out_path=extract_path, in_name='FjSfxBinay CAB',
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padding=padding + 8, check=True) == 0:
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os.remove(path=cab_path)
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else:
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return 3
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else:
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return 2
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return 0
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if __name__ == '__main__':
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FujitsuSfxExtract().run_utility()
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