Programming language: Java
License: MIT License
Tags: Security     Projects    
Latest version: v0.17.0

Jwks RSA alternatives and similar libraries

Based on the "Security" category.
Alternatively, view Jwks RSA alternatives based on common mentions on social networks and blogs.

  • Tink

    Tink is a multi-language, cross-platform, open source library that provides cryptographic APIs that are secure, easy to use correctly, and hard(er) to misuse.
  • Kalium

    Java binding to the Networking and Cryptography (NaCl) library with the awesomeness of libsodium
  • Scout APM uses tracing logic that ties bottlenecks to source code so you know the exact line of code causing performance issues and can get back to building a great product faster.
    Sponsored scoutapm.com
  • Password4j

    Password4j is a user-friendly cryptographic library that supports Argon2, Bcrypt, Scrypt, PBKDF2 and various cryptographic hash functions.
  • SSLContext-Kickstart

    ๐Ÿ” A lightweight high level library for configuring a http client or server based on SSLContext or other properties such as TrustManager, KeyManager or Trusted Certificates to communicate over SSL TLS for one way authentication or two way authentication provided by the SSLFactory. Support for Java, Scala and Kotlin based clients with examples. Available client examples are: Apache HttpClient, OkHttp, Spring RestTemplate, Spring WebFlux WebClient Jetty and Netty, the old and the new JDK HttpClient, the old and the new Jersey Client, Google HttpClient, Unirest, Retrofit, Feign, Methanol, Vertx, Scala client Finagle, Featherbed, Dispatch Reboot, AsyncHttpClient, Sttp, Akka, Requests Scala, Http4s Blaze, Kotlin client Fuel, http4k Kohttp and Ktor. Also gRPC and ElasticSearch examples are included
  • SecurityBuilder

    Fluent builders with typesafe API for the JCA
  • OTP-Java

    A small and easy-to-use one-time password generator library for Java according to RFC 4226 (HOTP) and RFC 6238 (TOTP).

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CircleCI Maven Central FOSSA Status





implementation 'com.auth0:jwks-rsa:0.17.0'


The JSON Web Tokens you get from the Authorization Server include a key id header parameter ("kid"), used to uniquely identify the Key used to sign the token.

i.e.: Given the following JWT:


Decode it using any JWT library or tool like jwt.io and extract the kid parameter from the Header claims.

  "typ": "JWT",
  "alg": "RS256",

Use this kid on any of the JwkProviders enumerated below to obtain the signing key provided by the JWKS endpoint you've configured.


UrlJwkProvider fetches the jwk from /.well-known/jwks.json of the supplied domain issuer and returns a Jwk if the kid matches one of the registered keys.

JwkProvider provider = new UrlJwkProvider("https://samples.auth0.com/");
Jwk jwk = provider.get("{kid of the signing key}"); //throws Exception when not found or can't get one

Also it can load jwks.json file from any given Url (even to a local file in your filesystem).

JwkProvider provider = new UrlJwkProvider(new URL("https://samples.auth0.com/"));
Jwk jwk = provider.get("{kid of the signing key}"); //throws Exception when not found or can't get one


GuavaCachedJwkProvider cache the jwk in a LRU in memory cache, if the jwk is not found in the cache it will ask another provider for it and store it's result in the cache.

By default it stores 5 keys for 10 minutes, but these values can be changed.

JwkProvider http = new UrlJwkProvider("https://samples.auth0.com/");
JwkProvider provider = new GuavaCachedJwkProvider(http);
Jwk jwk = provider.get("{kid of the signing key}"); //throws Exception when not found or can't get one


RateLimitJwkProvider will limit the amounts of different signing keys to get in a given time frame.

By default the rate is limited to 10 different keys per minute but these values can be changed.

JwkProvider url = new UrlJwkProvider("https://samples.auth0.com/");
Bucket bucket = new Bucket(10, 1, TimeUnit.MINUTES);
JwkProvider provider = new RateLimitJwkProvider(url, bucket);
Jwk jwk = provider.get("{kid of the signing key}"); //throws Exception when not found or can't get one


To create a provider for domain https://samples.auth0.com with cache and rate limit:

JwkProvider provider = new JwkProviderBuilder("https://samples.auth0.com/")
Jwk jwk = provider.get("{kid of the signing key}"); //throws Exception when not found or can't get one

and specifying cache and rate limit attributes:

JwkProvider provider = new JwkProviderBuilder("https://samples.auth0.com/")
    .cached(10, 24, TimeUnit.HOURS)
    .rateLimited(10, 1, TimeUnit.MINUTES)
Jwk jwk = provider.get("{kid of the signing key}"); //throws Exception when not found or can't get one

Error handling

There are certain scenarios in which this library can fail. Read below to understand what to expect and how to handle the errors.

Missing JSON Web Key

This error may arise when the hosted JSON Web Key set (JWKS) file doesn't represent a valid set of keys, or is empty. They are raised as a SigningKeyNotFoundException. The cause would need to be inspected in order to understand the specific failure reason.

Network error

There's a special case for Network errors. These errors represent timeouts, invalid URLs, or a faulty internet connection. They may occur when fetching the keys from the given URL. They are raised as a NetworkException instance.

If you need to detect this scenario, make sure to check it before the catch of SigningKeyNotFoundException.

try {
    // ...
} catch (NetworkException e) {
    // Network error
} catch (SigningKeyNotFoundException e) {
    // Key is invalid or not found

Unsupported JSON Web Key

When the received key is not of a supported type, or the attribute values representing it are wrong, an InvalidPublicKeyException will be raised. The following key types are supported:

  • RSA
  • Elliptic Curve
    • P-256
    • P-384
    • P-521

Rate limits

When using a rate-limited provider, a RateLimitReachedException error might be raised when the limit is breached. The instance can help determine how long to wait until the next call would be available.

try {
    // ...
} catch (RateLimitReachedException e) {
    long waitTime = e.getAvailableIn()
    // wait until available

What is Auth0?

Auth0 helps you to:

  • Add authentication with multiple authentication sources, either social like Google, Facebook, Microsoft Account, LinkedIn, GitHub, Twitter, Box, Salesforce, amont others, or enterprise identity systems like Windows Azure AD, Google Apps, Active Directory, ADFS or any SAML Identity Provider.
  • Add authentication through more traditional username/password databases.
  • Add support for linking different user accounts with the same user.
  • Support for generating signed Json Web Tokens to call your APIs and flow the user identity securely.
  • Analytics of how, when and where users are logging in.
  • Pull data from other sources and add it to the user profile, through JavaScript rules.

Create a free Auth0 Account

  1. Go to Auth0 and click Sign Up.
  2. Use Google, GitHub or Microsoft Account to login.

Issue Reporting

If you have found a bug or if you have a feature request, please report them at this repository issues section. Please do not report security vulnerabilities on the public GitHub issue tracker. The Responsible Disclosure Program details the procedure for disclosing security issues.




This project is licensed under the MIT license. See the [LICENSE](LICENSE) file for more info.

FOSSA Status

*Note that all licence references and agreements mentioned in the Jwks RSA README section above are relevant to that project's source code only.