#SPRING DECODE JWT TOKEN HOW TO#
#SPRING DECODE JWT TOKEN CODE#

For example, if you’d like to pass an email and a name, first build a ClaimsSet with two claims: JWTClaimsSet claims = new JWTClaimsSet.Builder() Creating the PayloadĮach piece of the data in the payload is called a claim. One of those is the payload, which contains the actual data to carry. Creating a TokenĪ JWT will have multiple parts.

#SPRING DECODE JWT TOKEN CODE#

I’ll be pasting in some code snippets as examples, but for a detailed reference, you can refer to the JwtService class of Spring Lemon and the Spring Framework Recipes For Real World Application Development book. authorization, email validation, forgot-password etc. In this post, we’ll discuss creating/parsing JWE tokens using a shared key, which would fit into most use cases when developing stateless REST Web Services - e.g. Nimbus JWT supports multiple algorithms for signing and encrypting tokens.

So, when using Spring Security 5, it’s natural to prefer Nimbus JWT instead of any other library. Secondy, Spring Security 5 itself uses Nimbus JWT - its dependencies like spring-security-oauth2-client and spring-security-oauth2-jose include nimbus-jose-jwt. JWE is essential for creating tokens to be sent through mail (e.g. For example, JJWT supports only JWS, but Nimbus supports both JWS and JWE. It has many useful features that are not found in JJWT.

#SPRING DECODE JWT TOKEN HOW TO#

In fact, most articles on the Internet that dicuss how to use JWT with Spring use the JJWT library.įor a couple of reasons. Between these, JJWT is simple and easy to use. Java has two popular open source libraries for JWT creation and parsing: JJWT and Nimbus JOSE + JWT. JWE tokens instead will have the data encrypted so that no one (except the creator or someone having the secret key) can parse it.

For example, these can be used as authentication tokens where the front-end or any client needs to read the data. That means that the data can be parsed by anyone. JWS tokens will have their data signed but not encrypted. There are two kinds of JWTs - JWS and JWE. The data would be signed/encrypted, so that malicious guys can’t alter it (or create another token with altered data). So, instead of repeating those here, let's just summarize it as plainly as possible.Ī JWT is a URL-safe token with some data embedded in it. There’s already a lot of material available on JWT. It’s a library encapsulating the sophisticated non-functional code and configuration that’s needed when developing real-world RESTful web services using the Spring framework and Spring Boot. If you haven’t heard of Spring Lemon, you should give it a look. In this post, we'll discuss why and how to use the Nimbus JOSE + JWT library for creating and parsing JWT (JWE) tokens.įor code examples, we’ll refer to Spring Lemon. Base64 DecodeĪll three parts are Base64 url encoded, use the Base64 class to decode.JWTs could be very useful in RESTful Web Services - not only for stateless authentication, but for all the purposes that require tokens - e.g. Let us split the parts using String split method. The token received in the request must contain 3 parts we mentioned above. If we do not want to store the token in the database, we should keep the signature section in the token. JWT may not contain the signature section, but that would not help the server verify the token. payload (carrying information to be used).

Spring decode jwt token