urbitWallet

//Get managment seed and login code given a patp and master tikets
// -s ship_name -t ticket
// To-Do: Make installable by NPM add help
kg = require('urbit-key-generation');
ob = require('urbit-ob');
jssha256 = require('js-sha256');
var fs = require('fs')
NETWORK_KEY_CURVE_PARAMETER = '42';

var args = process.argv.slice(2);

shipIndex = args.indexOf('-s');
ticketIndex = args.indexOf('-t')
nameIndex = args.indexOf('-n')
name = args[nameIndex + 1];

config = {shipName: args[shipIndex + 1], ship: ob.patp2dec(args[shipIndex + 1]), ticket: args[ticketIndex + 1], boot: true}

function hex2buf(hex) {
  return Buffer.from(hex, 'hex').reverse();
}

function shax(buf) {
  const hashed = jssha256.sha256.array(buf);
  return Buffer.from(hashed);
}

function shas(buf, salt) {
  return shax(xor(salt, shax(buf)));
}

function shaf(buf, salt) {
  const result = shas(buf, salt);
  const halfway = result.length / 2;
  const front = result.slice(0, halfway);
  const back = result.slice(halfway, result.length);
  return xor(front, back);
}

function xor(a, b) {
  if (!Buffer.isBuffer(a) || !Buffer.isBuffer(b)) {
    console.log('a', a);
    console.log('b', b);
    throw new Error('only xor buffers!');
  }
  const length = Math.max(a.byteLength, b.byteLength);
  const result = new Uint8Array(length);
  for (let i = 0; i < length; i++) {
    result[i] = a[i] ^ b[i];
  }
  return result;
}

function buf2hex(buf) {
  return Buffer.from(buf)
    .reverse()
    .toString('hex');
}

function getSeed(ticket, ship){
	wallet = kg.generateWallet({ticket: ticket, ship: ob.patp2dec(ship), boot: true});
	wallet.then(function(data){seed = data.management.seed})
}

function createRing(pair){
	return pair.crypt.private + pair.auth.private + NETWORK_KEY_CURVE_PARAMETER;
}

function generateCode(pair) {
  const ring = hex2buf(createRing(pair));
  const salt = hex2buf('73736170'); // salt is the noun %pass
  const hash = shax(ring);
  const result = shaf(hash, salt);
  const half = result.slice(0, result.length / 2);
  return ob.hex2patp(buf2hex(half)).slice(1);
};


function setWallet(config){
	wallet = kg.generateWallet(config);
	wallet.then(function(data){
		//config.pair = data.network.keys;
		config.managementSeed = data.management.seed;
		config.login = generateCode(data.network.keys);
		process.stdout.write(
			"Ship: " + config.shipName + "\n" + 
			"Login: " + config.login + "\n" +
			"Link: " + "https://" + config.shipName.substring(1,14) + ".tlon.network" + "\n" +
			"Management Seed: " + config.managementSeed + "\n"
		);
		html = makeHTML();
		fs.writeFile('yourUrbitIsReady.html', html, function (err) {
		  if (err) return console.log(err);
		  console.log('Email text > file:///home/kenny/yourUrbitIsReady.html');
		});
	})
}

function setShip(ship){
	config.ticket = ship.ticket;
	config.ship = ob.patp2dec(ship.shipName);
	config.shipName = ship.shipName;
}

setWallet(config);

function makeHTML(){
	p1 = '<p ><span>Hey '
	p2 = name
	p3 = ', your urbit is ready!<br /><br /></span><span>Go to the following address to access it:&nbsp;<br /></span><span><a href="'
	p4 = "https://" + config.shipName.substring(1,14) + ".tlon.network"
	p5 ='" target="_blank">'
	p6 = "https://" + config.shipName.substring(1,14) + ".tlon.network"
	p7 = '</a></span></p><p ><span>Use the following code to log in:<br /></span><span><b><span>'
	p8 = config.login
	p9 = '</span></b></span></p><p ><span>If you&rsquo;re having a hard day, or need help in any way, email </span><a href="mailto:support@tlon.io" target="_blank"><span>support@tlon.io</span></a><span>. We&rsquo;re here for you. If you want to learn more about Urbit, check out </span><a href="https://urbit.org/" target="_blank"><span>http://urbit.org</span></a><span>!<br /><br /></span><span><span>You can use the documents attached to this email to manager your Urbit-ID at <a href="https://bridge.urbit.org/" target="_blank">https://bridge.urbit.org</a><br /><br /></span></span><span style="color: #888888;">-Kenny<br /></span><span style="color: #888888;">~sicdev-pilnup</span></p>'
	text = p1 + p2 + p3 + p4 + p5 + p6 + p7 + p8 + p9
	return text