jwt.js

'use strict';
// https://github.com/Brightspace/node-ecdsa-sig-formatter/blob/master/src/ecdsa-sig-formatter.js
require('./index');

var REPLACE = { '=': '', '-': '+', '_': '/', '/': '_', '+': '-' };

function replace(t) {
	return REPLACE[t] || t;
}

function tobase64(buf) {
	return buf.toString('base64').replace(/\/|\+/g, replace).replace(/=+$/g, '');
}

function frombase64(buf) {
	return buf.replace(/-|_/, replace);
}

function sign_HM256(data, secret) {
	return tobase64(F.Crypto.createHmac('sha256', secret, { encoding: 'utf8' }).update(Buffer.from(data, 'utf8')).digest());
}

function sign_ES256(data, secret) {
	//return tobase64(F.Crypto.createSign('sha256')('sha256', secret, { encoding: 'utf8' }).update(Buffer.from(data, 'utf8')).digest());
}

function encrypt(val, secret, type) {

	var base64 = Buffer.from(JSON.stringify(val).replace(/\n/g, '\r\n'), 'utf8').toString('base64').replace(/=+$/, '');
	var data = 'eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.' + base64;

	// {"alg": "HS256","typ": "JWT"}

	switch (type) {
		case 'HM256':
		default:
			return data + '.' + tobase64(sign_HM256(data, secret));
	}

}

function sign(val, secret, type) {

	var base64 = Buffer.from(JSON.stringify(val).replace(/\n/g, '\r\n'), 'utf8').toString('base64').replace(/=+$/, '');
	var data = 'eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.' + base64;

	// {"alg": "HS256","typ": "JWT"}

	switch (type) {
		case 'ES256':
			return data + '.' + tobase64(sign_ES256(data, secret));
		case 'HM256':
		default:
			return data + '.' + tobase64(sign_HM256(data, secret));
	}

}

var crypto = F.Crypto.generateKeyPairSync('ec', { namedCurve: 'sect239k1' });
console.log(F.Crypto.Certificate(crypto.publicKey));

var sign = F.Crypto.createSign('SHA256');
sign.write('Peter');
sign.end();
// console.log(sign.sign(privateKey, 'base64'));
// console.log(encrypt({ name: 'Peter' }, Buffer.from('12345678', 'ascii')));