Fujitsu UPC BIOS Extractor v1.0

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

Fujitsu SFX BIOS Extractor/Fujitsu_SFX_Extract.py

@@ -0,0 +1,82 @@
+#!/usr/bin/env python3
+
+"""
+Fujitsu SFX Extractor
+Fujitsu SFX BIOS Extractor
+Copyright (C) 2019-2021 Plato Mavropoulos
+"""
+
+print('Fujitsu SFX BIOS Extractor v2.1')
+
+import os
+import re
+import sys
+import subprocess
+
+if len(sys.argv) >= 2 :
+	# Drag & Drop or CLI
+	fjsfx_exec = sys.argv[1:]
+else :
+	# Folder path
+	fjsfx_exec = []
+	in_path = input('\nEnter the full folder path: ')
+	print('\nWorking...')
+	for root, dirs, files in os.walk(in_path):
+		for name in files :
+			fjsfx_exec.append(os.path.join(root, name))
+
+# "FjSfxBinay" + Microsoft CAB Header XOR 0xFF (Tag[4] + Res[4] + Size[4] + Res[4] + Offset[4] + Res[4] + Ver[2]) pattern
+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)
+			
+for input_file in fjsfx_exec :
+	file_path = os.path.abspath(input_file)
+	file_dir = os.path.dirname(file_path)
+	file_name = os.path.basename(file_path)
+	
+	print('\nFile: ' + file_name)
+	
+	# Open Fujitsu SFX Binary Packager executable as mutable bytearray
+	with open(input_file, 'rb') as in_file : FjSfx = bytearray(in_file.read())
+	
+	match_mscf = mscf_pattern.search(FjSfx) # Search for Fujitsu Microsoft CAB Header XOR 0xFF pattern
+	
+	# Check if Microsoft CAB Header XOR 0xFF pattern exists
+	if match_mscf :
+		print('\n      Detected Obfuscation!')
+		
+		mscf_start = match_mscf.start() + 0xA # Microsoft CAB Header XOR 0xFF starts after "FjSfxBinay" signature
+		
+		# Determine the Microsoft CAB image Size
+		cab_size = int.from_bytes(FjSfx[mscf_start + 0x8:mscf_start + 0xC], 'little') # Get LE XOR-ed CAB Size
+		xor_size = int.from_bytes(b'\xFF' * 0x4, 'little') # Create CAB Size XOR value
+		cab_size = cab_size ^ xor_size # Perform XOR 0xFF and get actual CAB Size
+		
+		print('\n      Removing Obfuscation...')
+			
+		# Determine the Microsoft CAB image Data
+		cab_data = int.from_bytes(FjSfx[mscf_start:mscf_start + cab_size], 'big') # Get BE XOR-ed CAB Data
+		xor_data = int.from_bytes(b'\xFF' * cab_size, 'big') # Create CAB Data XOR value
+		cab_data = (cab_data ^ xor_data).to_bytes(cab_size, 'big') # Perform XOR 0xFF and get actual CAB Data
+		
+		print('\n      Extracting...')
+		
+		with open('fjsfx_temp.cab', 'wb') as cab_file : cab_file.write(cab_data) # Create temporary CAB image
+		
+		extr_path = os.path.join(file_dir, file_name[:-4], '') # Create CAB image extraction path
+		
+		try :
+			decomp = subprocess.run(['7z', 'x', '-aou', '-bso0', '-bse0', '-bsp0', '-o' + extr_path, 'fjsfx_temp.cab']) # 7-Zip
+			
+			print('\n      Extracted!')
+		except :
+			print('\n      Error: Could not decompress Microsoft CAB image!')
+			print('             Make sure that "7z" executable exists!')
+			
+		os.remove('fjsfx_temp.cab') # Remove temporary CAB image
+		
+	else :
+		print('\n      Error: This is not a Fujitsu SFX BIOS image!')
+		continue # Next input file
+
+else :
+	input('\nDone!')