@pretendonetwork/ctr-tools

ctr-tools

TypeScript library for interacting with several Nintendo 3DS file types. Mainly used to process CIA files for the Pretendo eShop

Installation

npm i @pretendonetwork/ctr-tools

Supported files

• CIA. Does not decrypt contents
• Certificates. Signature verification works, just not on illegitimate signatures (homebrew, forged tickets, etc)
• SMDH. All data is extracted, but some pieces (like several sections of Application Settings) are left as Buffer blobs
• TMD
• Ticket. Does not decrypt title key

Example

import fs from 'node:fs';
import { CIA } from '@pretendonetwork/ctr-tools/cia';

const cia = new CIA(`${__dirname}/nimbus.cia`);

console.log(cia.CACertificate.verifySignature(cia.TMDCertificate)); // true. Certificates are signed by Nintendo, and should always pass
console.log(cia.CACertificate.verifySignature(cia.ticketCertificate)); // true. Certificates are signed by Nintendo, and should always pass
console.log(cia.TMDCertificate.verifySignature(cia.TMD)); // false. Example Nimbus is a homebrew title, not signed by Nintendo. Nintendo signatures return true
console.log(cia.ticketCertificate.verifySignature(cia.ticket)); // false. Example Nimbus is a homebrew title, not signed by Nintendo. Nintendo signatures return true

if (cia.meta) {
	const largeIconData = cia.meta.iconData.exportLargeImage();
	fs.writeFileSync('./icon-large.png', largeIconData); // 48x48px SMDH icon from the CIA meta section

	console.log(cia.meta.iconData.getEnglishApplicationTitle());
	//{
	//	descriptionShort: 'Nimbus',
	//	descriptionLong: 'Nimbus',
	//	publisher: 'Zaksabeast, shutterbug2000'
	//}
}