from binascii import unhexlify
from Crypto.Cipher import AES
import struct

def _aschar(b):
    return struct.unpack("b", bytes([b & 0xFF]))[0]

def _decode_kek(a):
    if len(a) != 16:
        raise ValueError("KEK incorrect length. Should be 16 was %d" % len(a))
    kek = []
    for b in a:
        c1 = _aschar(a[0] * b)
        c2 = _aschar((a[0] * b) // 0x5d)
        kek += [_aschar(c1 + c2 * -0x5d + ord('!'))]
    return bytes(kek)

def _get_bytes(a):
    print(a)
    a = a.replace(" ", "").replace("\t", "").split(":")
    return unhexlify(a[0] if len(a)==1 else a[1])

kek = _decode_kek(_get_bytes(input("Enter KEK hex string line>")))

encoded_key = b""
for n in range(2):
    a = input("Encoded aus-key as hex string line %d>" % (n+1))
    encoded_key += _get_bytes(a)

cipher = AES.new(kek, AES.MODE_ECB)
auskey = cipher.decrypt(encoded_key)

print("Auskey:", auskey)
print("Root password:", auskey[-8:])