3DS-NUSD

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A 3DS NUS Downloader and CIA Generator for Python 3

3DS-NUSD 최신버젼 다운로드

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3DS-NUSD
========
This is a **3DS NUS downloader** written in Python 3(.6). It uses my own [CIAGEN](CIAGEN.py), completely written from scratch to create CIAs from CDN content. 3DS-NUSD can even create tickets from encrypted title keys.

It uses the `requests` module, so you'll need to install it with e.g. pip.

"**CIAGEN**" can create CIAs from cetk + tmd + contents completely in Python without make_cdn_cia. It can also unpack a CIA to its CDN contents!

**Related project:** [PyNUSD](https://github.com/WiiDatabase/PyNUSD)

## Features
### 3DS-NUSD
* Downloads 3DS titles from the **N**intendo **U**pdate **S**erver
  * NOTE: Only unblocked titles (e.g. system stuff) can be downloaded
* Packs them as valid CIAs
* Also accepts encrypted title keys
* Supports CDN mirrors through the --base parameter
* Uses my own CIAGEN, completely tested, verified and written from scratch

### CIAGEN
* Can be used as independent library
* Creates valid CIAs
* Verifies Signature (place root-key in the same directory)
* Doesn't modify the original TMD and contents

## Usage
```
usage: 3DS-NUSD.py [-h] [--nopack] [--deletecontents] [--key ENCRYPTED_KEY]
                   [--onlyticket] [--cdn] [--base BASE_URL]
                   titleid [titleversion]

positional arguments:
  titleid              Title ID
  titleversion         Title version (default: Latest)

optional arguments:
  -h, --help           show this help message and exit
  --nopack             Do not generate CIA.
  --deletecontents     Do not keep contents.
  --key ENCRYPTED_KEY  Encrypted title key for Ticket generation.
  --onlyticket         Only create the ticket, don't store anything.
  --cdn                Store contents like on CDN (without version directory)
  --base BASE_URL      Base URL for CDN download
```

## TODO
- [X] Use Structs (already in CIAGEN)
- [X] Improve Struct code (for e.g. ticket template and reading from binary)
- [ ] More Error handling and retrying
- [ ] Improve error handling in CIAGEN, especially for certificates and too short tmds/tickets
- [ ] Support for decrypting & SHA256 verify (via decTitleKeys.bin?)
- [ ] uselocal parameter (needs SHA256 verifying)
- [ ] GUI?

## Credits
* Daeken for original Struct.py
* ps3hen for [make_cdn_cia](https://github.com/Tiger21820/ctr_toolkit/tree/master/make_cdn_cia)
* profi200 & contributors for [makerom](https://github.com/profi200/Project_CTR/tree/master/makerom)

## Screenshots
![Screenshot](https://raw.githubusercontent.com/WiiDatabase/3DS-NUSD/master/screenshot.png)

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