Web Auth Library
Authentication library for Google Cloud, Firebase, and other cloud providers that uses standard Web Crypto API and runs in different environments and runtimes, including but not limited to:
It has minimum dependencies, small bundle size, and optimized for speed and performance.
Getting Stated
# Install using NPM
$ npm install web-auth-library --save
# Install using Yarn
$ yarn add web-auth-library
Usage Examples
Verify the user ID Token issued by Google or Firebase
NOTE: The credentials
argument in the examples below is expected to be a serialized JSON string of a Google Cloud service account key, apiKey
is Google Cloud API Key (Firebase API Key), and projectId
is a Google Cloud project ID.
import { verifyIdToken } from "web-auth-library/google";
const token = await verifyIdToken({
idToken,
credentials: env.GOOGLE_CLOUD_CREDENTIALS,
});
// => {
// iss: 'https://securetoken.google.com/example',
// aud: 'example',
// auth_time: 1677525930,
// user_id: 'temp',
// sub: 'temp',
// iat: 1677525930,
// exp: 1677529530,
// firebase: {}
// }
Google Cloud APIs
Create an access token for accessingimport { getAccessToken } from "web-auth-library/google";
// Generate a short lived access token from the service account key credentials
const accessToken = await getAccessToken({
credentials: env.GOOGLE_CLOUD_CREDENTIALS,
scope: "https://www.googleapis.com/auth/cloud-platform",
});
// Make a request to one of the Google's APIs using that token
const res = await fetch(
"https://cloudresourcemanager.googleapis.com/v1/projects",
{
headers: { Authorization: `Bearer ${accessToken}` },
}
);
Create a custom ID token using Service Account credentials
import { getIdToken } from "web-auth-library/google";
const idToken = await getIdToken({
credentials: env.GOOGLE_CLOUD_CREDENTIALS,
audience: "https://example.com",
});
An alternative way passing credentials
Instead of passing credentials via options.credentials
argument, you can also let the library pick up credentials from the list of environment variables using standard names such as GOOGLE_CLOUD_CREDENTIALS
, GOOGLE_CLOUD_PROJECT
, FIREBASE_API_KEY
, for example:
import { verifyIdToken } from "web-auth-library/google";
const env = { GOOGLE_CLOUD_CREDENTIALS: "..." };
const token = await verifyIdToken({ idToken, env });
Optimize cache renewal background tasks
Pass the optional waitUntil(promise)
function provided by the target runtime to optimize the way authentication tokens are being renewed in background. For example, using Cloudflare Workers and Hono.js:
import { Hono } from "hono";
import { verifyIdToken } from "web-auth-library/google";
const app = new Hono();
app.get("/", ({ env, executionCtx, json }) => {
const idToken = await verifyIdToken({
idToken: "...",
waitUntil: executionCtx.waitUntil,
env,
});
return json({ ... });
})
Backers 💰
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How to Contribute
You're very welcome to create a PR or send me a message on Discord.
In order to unit test this library locally you will need Node.js v18+ with corepack enabled, a Google Cloud service account key (here) and Firebase API Key (here) that you can save into the test/test.override.env
file, for example:
GOOGLE_CLOUD_PROJECT=example
GOOGLE_CLOUD_CREDENTIALS={"type":"service_account","project_id":"example",...}
FIREBASE_API_KEY=AIzaSyAZEmdfRWvEYgZpwm6EBLkYJf6ySIMF3Hy
Then run unit tests via yarn test [--watch]
.
License
Copyright © 2022-present Kriasoft. This source code is licensed under the MIT license found in the LICENSE file.
Made with ♥ by Konstantin Tarkus (@koistya, blog) and contributors.