3DS Ticket Generator

import os
import sys
import struct

tikTemplate="00010004d15ea5e0d15ea5e0d15ea5e0d15ea5e0d15ea5e0d15ea5e0d15ea5e0d15ea5e0d15ea5e0d15ea5e0d15ea5e0d15ea5e0d15ea5e0d15ea5e0d15ea5e0d15ea5e0d15ea5e0d15ea5e0d15ea5e0d15ea5e0d15ea5e0d15ea5e0d15ea5e0d15ea5e0d15ea5e0d15ea5e0d15ea5e0d15ea5e0d15ea5e0d15ea5e0d15ea5e0d15ea5e0d15ea5e0d15ea5e0d15ea5e0d15ea5e0d15ea5e0d15ea5e0d15ea5e0d15ea5e0d15ea5e0d15ea5e0d15ea5e0d15ea5e0d15ea5e0d15ea5e0d15ea5e0d15ea5e0d15ea5e0d15ea5e0d15ea5e0d15ea5e0d15ea5e0d15ea5e0d15ea5e0d15ea5e0d15ea5e0d15ea5e0d15ea5e0d15ea5e0d15ea5e0d15ea5e0d15ea5e0d15ea5e0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000526f6f742d434130303030303030332d585330303030303030630000000000000000000000000000000000000000000000000000000000000000000000000000feedfacefeedfacefeedfacefeedfacefeedfacefeedfacefeedfacefeedfacefeedfacefeedfacefeedfacefeedfacefeedfacefeedfacefeedface010000eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee00000000000000000000000000dddddddddddddddd00001111000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000010000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000010014000000ac000000140001001400000000000000280000000100000084000000840003000000000000ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000010004919ebe464ad0f552cd1b72e7884910cf55a9f02e50789641d896683dc005bd0aea87079d8ac284c675065f74c8bf37c88044409502a022980bb8ad48383f6d28a79de39626ccb2b22a0f19e41032f094b39ff0133146dec8f6c1a9d55cd28d9e1c47b3d11f4f5426c2c780135a2775d3ca679bc7e834f0e0fb58e68860a71330fc95791793c8fba935a7a6908f229dee2a0ca6b9b23b12d495a6fe19d0d72648216878605a66538dbf376899905d3445fc5c727a0e13e0e2c8971c9cfa6c60678875732a4e75523d2f562f12aabd1573bf06c94054aefa81a71417af9a4a066d0ffc5ad64bab28b1ff60661f4437d49e1e0d9412eb4bcacf4cfd6a3408847982000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000526f6f742d43413030303030303033000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000158533030303030303063000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000137a0894ad505bb6c67e2e5bdd6a3bec43d910c772e9cc290da58588b77dcc11680bb3e29f4eabbb26e98c2601985c041bb14378e689181aad770568e928a2b98167ee3e10d072beef1fa22fa2aa3e13f11e1836a92a4281ef70aaf4e462998221c6fbb9bdd017e6ac590494e9cea9859ceb2d2a4c1766f2c33912c58f14a803e36fccdcccdc13fd7ae77c7a78d997e6acc35557e0d3e9eb64b43c92f4c50d67a602deb391b06661cd32880bd64912af1cbcb7162a06f02565d3b0ece4fcecddae8a4934db8ee67f3017986221155d131c6c3f09ab1945c206ac70c942b36f49a1183bcd78b6e4b47c6c5cac0f8d62f897c6953dd12f28b70c5b7df751819a9834652625000100010000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000010003704138efbbbda16a987dd901326d1c9459484c88a2861b91a312587ae70ef6237ec50e1032dc39dde89a96a8e859d76a98a6e7e36a0cfe352ca893058234ff833fcb3b03811e9f0dc0d9a52f8045b4b2f9411b67a51c44b5ef8ce77bd6d56ba75734a1856de6d4bed6d3a242c7c8791b3422375e5c779abf072f7695efa0f75bcb83789fc30e3fe4cc8392207840638949c7f688565f649b74d63d8d58ffadda571e9554426b1318fc468983d4c8a5628b06b6fc5d507c13e7a18ac1511eb6d62ea5448f83501447a9afb3ecc2903c9dd52f922ac9acdbef58c6021848d96e208732d3d1d9d9ea440d91621c7a99db8843c59c1f2e2c7d9b577d512c166d6f7e1aad4a774a37447e78fe2021e14a95d112a068ada019f463c7a55685aabb6888b9246483d18b9c806f474918331782344a4b8531334b26303263d9d2eb4f4bb99602b352f6ae4046c69a5e7e8e4a18ef9bc0a2ded61310417012fd824cc116cfb7c4c1f7ec7177a17446cbde96f3edd88fcd052f0b888a45fdaf2b631354f40d16e5fa9c2c4eda98e798d15e6046dc5363f3096b2c607a9d8dd55b1502a6ac7d3cc8d8c575998e7d796910c804c495235057e91ecd2637c9c1845151ac6b9a0490ae3ec6f47740a0db0ba36d075956cee7354ea3e9a4f2720b26550c7d394324bc0cb7e9317d8a8661f42191ff10b08256ce3fd25b745e5194906b4d61cb4c2e000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000526f6f7400000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001434130303030303030330000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000007be8ef6cb279c9e2eee121c6eaf44ff639f88f078b4b77ed9f9560b0358281b50e55ab721115a177703c7a30fe3ae9ef1c60bc1d974676b23a68cc04b198525bc968f11de2db50e4d9e7f071e562dae2092233e9d363f61dd7c19ff3a4a91e8f6553d471dd7b84b9f1b8ce7335f0f5540563a1eab83963e09be901011f99546361287020e9cc0dab487f140d6626a1836d27111f2068de4772149151cf69c61ba60ef9d949a0f71f5499f2d39ad28c7005348293c431ffbd33f6bca60dc7195ea2bcc56d200baf6d06d09c41db8de9c720154ca4832b69c08c69cd3b073a0063602f462d338061a5ea6c915cd5623579c3eb64ce44ef586d14baaa8834019b3eebeed3790001000100000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"

def makeTik(path):
    tmd=open(os.path.join(path,"tmd"),"rb")
    tmd.seek(0x18c)
    titleID=tmd.read(0x08)
    tmd.seek(0x1dc)
    titleVer,numContent=struct.unpack(">HH",tmd.read(0x04))
    tmd.close()

    f=open("encTitleKeys.bin","rb")
    numKeys,padding=struct.unpack("<I12s",f.read(0x10))
    encTitleKey=None
    for i in range(numKeys):
        ckeyIdx,unk,ID,encTitleKey=struct.unpack("<II8s16s",f.read(0x20))
        if ID==titleID:
            break
    f.close()

    if ID!=titleID:
        print("Title key for title ID %s not found." % titleID.hex())
        return

    print("Title ID: %s\nTitle version: %d\nEncrypted title key: %s\nCommon key index: %d" % (titleID.hex(),titleVer,encTitleKey.hex(),ckeyIdx))

    tikData=bytearray.fromhex(tikTemplate)
    tikData[0x1bf:0x1cf]=encTitleKey
    tikData[0x1dc:0x1e4]=titleID
    tikData[0x1e6:0x1e8]=struct.pack(">H",titleVer)
    tikData[0x1f1:0x1f2]=struct.pack(">B",ckeyIdx)

    tik=open(os.path.join(path,"cetk"),"wb")
    tik.write(tikData)
    tik.close()

if __name__=="__main__":
    path=sys.argv[1]
    makeTik(path)