Huge News!Announcing our $40M Series B led by Abstract Ventures.Learn More
Socket
Sign inDemoInstall
Socket

@apptentive/jwks-rsa

Package Overview
Dependencies
Maintainers
5
Versions
3
Alerts
File Explorer

Advanced tools

Socket logo

Install Socket

Detect and block malicious and high-risk dependencies

Install

@apptentive/jwks-rsa

Library to retrieve RSA public keys from a JWKS endpoint

  • 1.3.2
  • latest
  • Source
  • npm
  • Socket score

Version published
Maintainers
5
Created
Source

jwks-rsa

A library to retrieve RSA signing keys from a JWKS (JSON Web Key Set) endpoint.

npm install --save jwks-rsa

Usage

You'll provide the client with the JWKS endpoint which exposes your signing keys. Using the getSigningKey you can then get the signing key that matches a specific kid.

const jwksClient = require('jwks-rsa');

const client = jwksClient({
  strictSsl: true, // Default value
  jwksUri: 'https://sandrino.auth0.com/.well-known/jwks.json'
});

const kid = 'RkI5MjI5OUY5ODc1N0Q4QzM0OUYzNkVGMTJDOUEzQkFCOTU3NjE2Rg';
client.getSigningKey(kid, (err, key) => {
  const signingKey = key.publicKey || key.rsaPublicKey;

  // Now I can use this to configure my Express or Hapi middleware
});

Integrations are also provided with:

  • express/express-jwt
  • hapi/hapi-auth-jwt2
  • koa/koa-jwt

Caching

In order to prevent a call to be made each time a signing key needs to be retrieved you can also configure a cache as follows. If a signing key matching the kid is found, this will be cached and the next time this kid is requested the signing key will be served from the cache instead of calling back to the JWKS endpoint.

const jwksClient = require('jwks-rsa');

const client = jwksClient({
  cache: true,
  cacheMaxEntries: 5, // Default value
  cacheMaxAge: ms('10h'), // Default value
  jwksUri: 'https://sandrino.auth0.com/.well-known/jwks.json'
});

const kid = 'RkI5MjI5OUY5ODc1N0Q4QzM0OUYzNkVGMTJDOUEzQkFCOTU3NjE2Rg';
client.getSigningKey(kid, (err, key) => {
  const signingKey = key.publicKey || key.rsaPublicKey;

  // Now I can use this to configure my Express or Hapi middleware
});

Rate Limiting

Even if caching is enabled the library will call the JWKS endpoint if the kid is not available in the cache, because a key rotation could have taken place. To prevent attackers to send many random kids you can also configure rate limiting. This will allow you to limit the number of calls that are made to the JWKS endpoint per minute (because it would be highly unlikely that signing keys are rotated multiple times per minute).

const jwksClient = require('jwks-rsa');

const client = jwksClient({
  cache: true,
  rateLimit: true,
  jwksRequestsPerMinute: 10, // Default value
  jwksUri: 'https://sandrino.auth0.com/.well-known/jwks.json'
});

const kid = 'RkI5MjI5OUY5ODc1N0Q4QzM0OUYzNkVGMTJDOUEzQkFCOTU3NjE2Rg';
client.getSigningKey(kid, (err, key) => {
  const signingKey = key.publicKey || key.rsaPublicKey;

  // Now I can use this to configure my Express or Hapi middleware
});

Running Tests

npm run test

Showing Trace Logs

To show trace logs you can set the following environment variable:

DEBUG=jwks

Output:

jwks Retrieving keys from http://my-authz-server/.well-known/jwks.json +5ms
jwks Keys: +8ms [ { alg: 'RS256',
  kty: 'RSA',
  use: 'sig',
  x5c: [ 'pk1' ],
  kid: 'ABC' },
{ alg: 'RS256', kty: 'RSA', use: 'sig', x5c: [], kid: '123' } ]

Keywords

FAQs

Package last updated on 29 Jan 2019

Did you know?

Socket

Socket for GitHub automatically highlights issues in each pull request and monitors the health of all your open source dependencies. Discover the contents of your packages and block harmful activity before you install or update your dependencies.

Install

Related posts

SocketSocket SOC 2 Logo

Product

  • Package Alerts
  • Integrations
  • Docs
  • Pricing
  • FAQ
  • Roadmap
  • Changelog

Packages

npm

Stay in touch

Get open source security insights delivered straight into your inbox.


  • Terms
  • Privacy
  • Security

Made with ⚡️ by Socket Inc