Created
December 13, 2018 04:11
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ASUS RAW flash file unpacker
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from argparse import ArgumentParser | |
class Image(): | |
def __init__(self): | |
self.partition = '' | |
self.imagename = '' | |
self.unknown1 = 0 | |
self.unknown1 = 0 | |
self.crc32 = 0 | |
def raw_unpack(listonly, file, offset): | |
ifs = open(file, 'rb') | |
magic = ifs.read(0xC) | |
assert magic == b'asus package' | |
ifs.seek(0x18) | |
count = int.from_bytes(ifs.read(8), byteorder='little', signed=False) | |
assert count != 0 | |
images = [Image() for _ in range(count)] | |
logfile = open("raw_info.txt", "w+") | |
log = '' | |
for i in range(count): | |
ifs.seek(0x30 + (i * 0x60)) | |
images[i].partition = ifs.read(0x20).decode('utf-16').rstrip('\x00') | |
images[i].imagename = ifs.read(0x20).decode('utf-8').rstrip('\x00') | |
images[i].length = int.from_bytes(ifs.read(8), byteorder='little', signed=False) | |
images[i].unknown1 = int.from_bytes(ifs.read(8), byteorder='little', signed=False) | |
images[i].unknown2 = int.from_bytes(ifs.read(8), byteorder='little', signed=False) | |
images[i].crc32 = int.from_bytes(ifs.read(8), byteorder='little', signed=False) | |
log += '%s\n' % images[i].partition | |
log += '-- name:\t%s\n' % images[i].imagename | |
log += '-- length:\t%.16X\n' % images[i].length | |
log += '-- unknown:\t%.16X\n' % images[i].unknown1 | |
log += '-- unknown:\t%.16X\n' % images[i].unknown2 | |
log += '-- crc32:\t%.16X\n\n' % images[i].crc32 | |
log = log.rstrip('\n') | |
logfile.write(log) | |
logfile.close() | |
if listonly == True: | |
print(log) | |
exit() | |
ifs.seek(offset) | |
for i in range(count): | |
ofs = open(images[i].imagename, 'w+b') | |
print('Extract\t%s ...' % images[i].imagename) | |
blocksize = 0x400000 | |
length = images[i].length | |
while length > 0: | |
if length >= blocksize: | |
buffer = ifs.read(blocksize) | |
else: | |
buffer = ifs.read(length) | |
ofs.write(buffer) | |
length -= len(buffer) | |
ofs.close() | |
ifs.close() | |
exit() | |
if __name__ == '__main__': | |
parser = ArgumentParser(description='ASUS RAW flash file unpacker') | |
parser.add_argument('-l', '--list', action='store_true', help='list all partition') | |
parser.add_argument('--offset', metavar='<int>', default=10240, type=int, help='specific data start offset') | |
parser.add_argument('filename', help='ASUS RAW flash file') | |
args = parser.parse_args() | |
raw_unpack(args.list, args.filename, args.offset) |
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