Version: 2.0.0 (latest)

Generate Tokens

You are reading the documentation for version 2 of FoalTS. Instructions for upgrading to this version are available here. The old documentation can be found here.

In many situations, we need to generate tokens and then verify them (for example in the flow of a password reset). This document shows how to do so with FoalTS.

Unsigned Tokens (simple case)#

The generateToken function generates a cryptographically secure random token encoded in base64url (128 bits)

import { generateToken } from '@foal/core';
const token = await generateToken();

Signed Tokens#

You can also generate a token using a secret. The secret is used to sign the token to provide extra security. It must be encoded in base64. You can generate one with the following command:

foal createsecret

Generate a signed token

import { generateSignedToken } from '@foal/core';
const token = await generateSignedToken(secret);

Verify and read a signed token

import { verifySignedToken } from '@foal/core';
const signedTokenToVerify = 'xxx.yyy';
const result = await verifySignedToken(signedTokenToVerify, secret);
if (result === false) {
console.log('incorrect signature');
} else {
console.log('The token is ', result);