Script to get icon and metadata for any Wii U title, title ID is hardcoded

verify.py

# only dependencies are pycrypto and requests, I had to rename pycrypto's thing
# in C:\Python27\Lib\site-packages to Crypto from pip cause it defaulted to lowercase
from StringIO import StringIO
from Crypto.Cipher import AES
from struct import unpack
from requests import get
from os.path import exists
from os import mkdir
import warnings, sys
warnings.filterwarnings("ignore")

data = [ #IV + 4 keys
"\xA4\x69\x87\xAE\x47\xD8\x2B\xB4\xFA\x8A\xBC\x04\x50\x28\x5F\xA4",
"\x4A\xB9\xA4\x0E\x14\x69\x75\xA8\x4B\xB1\xB4\xF3\xEC\xEF\xC4\x7B",
"\x90\xA0\xBB\x1E\x0E\x86\x4A\xE8\x7D\x13\xA6\xA0\x3D\x28\xC9\xB8",
"\xFF\xBB\x57\xC1\x4E\x98\xEC\x69\x75\xB3\x84\xFC\xF4\x07\x86\xB5",
"\x80\x92\x37\x99\xB4\x1F\x36\xA6\xA7\x5F\xB8\xB4\x8C\x95\xF6\x6F"]

title_id = "00050000101C5800"
cdn_url = "http://ccs.cdn.c.shop.nintendowifi.net/ccs/download/{}/".format(title_id)
url = "https://idbe-ctr.cdn.nintendo.net/icondata/%02X/%16s.idbe" % (0x10, title_id)
total_size = 0

def getstr(f):
    char = f.read(2); ret = ""
    while char != "\x00\x00":
        ret += char
        char = f.read(2)
    return ret.decode("UTF-16-BE").encode("UTF-8")

if __name__ == "__main__":
    if not exists("icons"):
        mkdir("icons")

    if not exists("icons/%s.idbe" % title_id):
        with open("icons/%s.idbe" % title_id, "wb") as f:
            r = get(url, verify="cert.pem")
            for chunk in r.iter_content(1024):
                if chunk: f.write(chunk)

    with open("icons/%s.idbe" % title_id, "rb") as f:
        assert ord(f.read(1)) == 0
        key_index = ord(f.read(1)) + 1 #IV is 0
        obj = AES.new(data[key_index], AES.MODE_CBC, IV=data[0])
        idbe = StringIO(obj.decrypt(f.read()))
        idbe.seek(0x30) #Region lockout
        region = unpack(">I", idbe.read(4))[0]
        idbe.seek(0x250)
        short_desc = getstr(idbe)
        idbe.seek(0x2D0)
        long_desc = getstr(idbe)
        idbe.seek(0x3D0)
        publisher = getstr(idbe)
        print("Title: %s (%s - %s)" % (long_desc, short_desc, publisher))

    if not exists("icons/%s.tga" % title_id):
        with open("icons/%s.tga" % title_id, "wb") as f:
            with open("icons/%s.idbe" % title_id, "rb") as r:
                r.seek(0x2050)
                f.write(r.read())
        print("Wrote TGA icon to icons/%s.tga" % title_id)
    else:
        print("TGA icon already exists (icons/%s.tga)" % title_id)

    r = get(cdn_url + "tmd")
    tmd = StringIO()
    for chunk in r.iter_content(1024):
        if chunk: tmd.write(chunk)
    tmd.seek(0)
    print("Parsing metadata...")
    tmd.seek(0x1DE)
    count = unpack(">H", tmd.read(2))[0]
    tmd.seek(0xB04)
    for i in range(count):
        content_id = unpack(">I", tmd.read(4))[0]
        tmd.seek(8, 1)
        content_size = unpack(">I", tmd.read(4))[0]
        tmd.seek(0x20, 1)
        print("%08X: %08X bytes" % (content_id, content_size))
        total_size += content_size
    print("Total size: {:.2f} MB (about {:,} bytes)".format\
         (total_size / 1024.0 / 1024.0, total_size))