xuanyuansword_icon_dumper.py

from macholib.MachO import MachO as macho

FILE = './xuanyuansword'
FILE_ICON = './xuanyuansword_icon'

macho_obj = macho(FILE)

for (load_cmd, cmd, data) in macho_obj.headers[0].commands:
    try:
        segname = getattr(cmd, 'segname')
    except:
        continue

    if segname.startswith('__DATA'):
        print('[+] segname: __DATA')

        nsects = getattr(cmd, 'nsects')
        print('[+] nsects: %d' % (nsects))

        for section in data:
            sectname = getattr(section, 'sectname')

            if sectname.startswith('__icon'):
                icon_offset = getattr(section, 'offset')
                icon_size = getattr(section, 'size')

                print('[+] __icon section: offset 0x%x size 0x%x' % \
                        (icon_offset, icon_size))
                    
                fh = open(FILE, 'rb')
                fh.seek(icon_offset + 0x4000)

                open(FILE_ICON, 'wb').write(fh.read(icon_size))

# EOF