gen-tie.py

#!/usr/bin/env python3

# very lazy script to generate the Title Info Entry for title.db

import argparse
import random

parser = argparse.ArgumentParser(description='Generate Title Info Entry.')
parser.add_argument('-o', help='output filename', type=argparse.FileType('wb'), required=True)
parser.add_argument('-v', help='title version', type=int, required=True)
parser.add_argument('-m', help='has manual', action='store_true')
parser.add_argument('-t', help='tmd content id as hexstring', required=True)
parser.add_argument('-c', help='cmd content id as hexstring', required=True)
parser.add_argument('-s', help='has SD save data', action='store_true')
parser.add_argument('-e', help='extdataid low as hexstring', required=True)
parser.add_argument('-p', help='product code', required=True)

a = parser.parse_args()

data = [
    # title size, putting 0 for now
    (0).to_bytes(8, 'little'),
    # title type, assuming 0x40 as it usually is
    0x40.to_bytes(4, 'little'),
    # title version
    a.v.to_bytes(4, 'little'),
    # flags_0, only checking electronic manual
    (1 if a.m else 0).to_bytes(4, 'little'),
    # tmd content id
    bytes.fromhex(a.t.rjust(8, '0'))[::-1],
    # cmd content id
    bytes.fromhex(a.c.rjust(8, '0'))[::-1],
    # flags_1, only checking save data
    (1 if a.s else 0).to_bytes(4, 'little'),
    # extdataid low
    bytes.fromhex(a.e.rjust(8, '0'))[::-1],
    # reserved
    b'\0' * 4,
    # flags_2, only using a common value
    0x100000000.to_bytes(8, 'little'),
    # product code
    a.p.encode('ascii').ljust(0x10, b'\0'),
    # reserved
    b'\0' * 0x10,
    # unknown
    random.randint(0, 0xFFFFFFFF).to_bytes(4, 'little'),
    # reserved
    b'\0' * 0x2c
]

result = b''.join(data)
a.o.write(result)
a.o.close()