Decode jwt token java spring boot example

Decode jwt token java spring boot example. But before we start we need to talk a little about what a JWT is, how it works, what are some of good usages and what are some bad usages of JWTs. ② リクエストのAuthorizationヘッダ内にあるJWTを取得. This library is supported for Java LTS versions 8, 11, and 17. eyJzdWIiOiJ0ZXN0Iiwicm9sZXMiOiJST0xFX0FETUlOIiwiaXNzIjoibXlzZWxmIiwiZXhwIjoxNDcxMDg2MzgxfQ. The decode() method, on the other hand, simply decodes the provided JWT token. Jul 30, 2019 · Usando o Spring Authentication Manager, autenticamos o nome de usuário e a senha. But the KeycloakAuthenticationToken token is null. It is robust and can carry a lot of information, but is still simple to use even though its size is relatively small. This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference. getCredentials ()) as well as a custom object like CustomPrincipal (or a User class or something Jul 21, 2022 · Writing a custom validation of something as important as tokens is not needed if you are using spring security since spring security has had full JWTSupport for several years now. Finally, we’ll see JWTs in action as CSRF tokens in a Spring Security, Spring Boot application. Nov 9, 2023 · The `JwtService` class is a component responsible for various operations related to JWT (JSON Web Tokens) in a Spring Boot application. It's an open standard (RFC 7519) that uses digital signatures to verify that the information is trustworthy. auth0:java-jwt): Retrieve the algorithm the key has been signed with, for example: // Load your public key from a file. parser() . ① リクエストを受け取る. Set up a Spring Boot Application. The first token will have a shorter expiry period compared with the second token (Refresh Token – more expiry period). setKey(hmacKey). 3. JSON Web Token (JWT) is an open standard ( RFC 7519) that defines a compact and self-contained way for securely transmitting information between parties as a JSON object. JSON Web Token (JWT) is an open standard (RFC 7519) that defines a compact and self-contained way for securely transmitting information between parties as a JSON object Aug 3, 2022 · JWT. Agrega las siguientes dependencias para Spring Security y JWT: <dependency> <groupId Spring Boot + Security: Token Based Authentication example with JWT, Authorization, Spring Data & MySQL - bezkoder/spring-boot-spring-security-jwt-authentication Jul 21, 2017 · 14. In the APIssection of the Auth0 dashboard, click Create API. Apr 4, 2018 · Vì tài khoản sena/123456 chỉ có role USER nên không thể truy cập được url /rest/users với method POST. Mar 5, 2024 · Test the implementation. Nov 21, 2022 · In this post, we will learn how JWT (JSON Web Token) based authentication works, and how to build a Spring Boot application in Java to implement it using the Spring Security library library. HMAC_SHA256 and the key with jws. Problem: Context: I've successfully implemented user registration and login functionality. The OAuth2 Authorization Server. Checking JWT Expiry Feb 17, 2020 · Fill in the token form with relevant details (Service provider URL, User name, Account number) and click "Get a token" button to get a signed and encrypted token. ・HTTPリクエストで送られてきた文字列. Note: The project uses Spring Boot from the beginning, as it’s easy to interact with the API that it exposes. In this tutorial we will be modifying the application to perform authentication using JSON Web Token. 2</version> </dependency> <dependency> <groupId>com. Apr 22, 2024 · Upon completing this article, you will be well-equipped to integrate JWT with Spring Security 6 in a Spring Boot 3 project, thereby bolstering your application's security. Signing and sign-in are different concepts. We set a bunch of claims ( sub, iat, exp, iss, name, email, email_verified) We set the signing algorithm to NONE and the algorithm constraint to NO_CONSTRAINT because jose4j will throw an exception because the algorithm lack security. auth0. decode(token); Apr 25, 2021 · Okta Spring Boot starter makes a call to v1/keys endpoint during application startup and caches the keys in memory. In this tutorial, we’ll explore a stateless Spring Boot application that utilizes JWT authentication. クラスとしての May 20, 2024 · In this article, we’ll see how to create a Spring Security key for signing JWT tokens and use it in a Spring Boot app to secure REST APIs. We also set the algorithm header value to HS256 by using jws. You will also discover how to test your API endpoints with Postman and JUnit. 4. First and Second token will be added to the response header. Whether you are a beginner or an expert in Spring Security, this tutorial Apr 24, 2018 · Join For Free. But a signing key is not a sign-in key. 4. codec. 0 Resource Server JWT). "); String b64payload = pieces[1]; String jsonString = new String(Base64. declaration: package: org. decode() method. java-jwt is intended for server-side JVM applications. lang. JSON Web Token (JWT) is an open standard (RFC 7519) that defines a compact and self-contained way for securely transmitting information between parties as a Use one of the several ways of running a Spring Boot application. arguments=--server. Learn how to use libraries like Mockito or PowerMock to test your code that involves JWT tokens. xml. Get the username from the claims object. The JWK Set Endpoint in the Authorization Server Dec 9, 2022 · How to Validate JWT Signatures. It contains methods for generating, parsing, and validating Nov 14, 2023 · Overview of Spring Boot JWT Authentication with PostgreSQL example. Not anymore! This tutorial will show you how to use an existing JWT library to do two things: Generate a JWT; Decode and verify a JWT Interface JwtDecoder. I have a sample code to validate the JWT returned by a provider. However, the support for decoding and verifying JWTs is in spring-security-oauth2-jose, meaning that both are necessary in order to have a working resource server that supports JWT-encoded Bearer Tokens. User sends Access token with each request to access protected Mar 25, 2023 · JWT (JSON Web Token) is a popular and secure way to authenticate and authorize users or applications in web services. The token received in the request must contain 3 parts we mentioned above. . note the changes with running the resource server, this is with 2. You are calling setSigningKey with a key returned by a method called getSignInKey. In this tutorial, we’re gonna build a Spring Boot Application that supports Token based Authentication with JWT. getBody() . . Parameters: secretKey - the SecretKey used to validate the MAC. Here is an example of how to get the username from a JWT token in Spring Boot Java: java import io. Use the JwtDecoder to decode the JWT token. java-jwt supports the following algorithms for both signing and verification: Jun 2, 2023 · Neste tutorial, você aprenderá como tornar sua aplicação Spring Boot segura usando Spring Security e token JWT. By User’s role (admin, moderator, user), we authorize the User to access resources. Returns: a NimbusJwtDecoder. Here you go: import org. Technologies Going to Use, Java 1. 3. Apr 28, 2022 · We are going to create 2 users and login with them. We’ll later use this during both the creation and verification of a token. Extract the contents of the zip file to a directory on your local machine. The back-end server uses Spring Boot with Spring Security for JWT Authentication & Role based Authorization, Spring Data JPA for interacting with database. E-commerce Website - Online Book Store using Angular 8 + Spring Boot; Spring Boot +JSON Web Token(JWT) Hello World Example; Angular 7 + Spring Boot Application Hello World Example; Build a Real Time Chat Application using Spring Boot + WebSocket + RabbitMQ; Pivotal Cloud Foundry Tutorial - Deploy Spring Boot Application Hello World Example Jul 31, 2017 · To verify a JWT in Java using Auth0 library (com. decode in Java, you can find some useful answers and examples on Stack Overflow, the largest online community for programmers. run. 6. In this tutorial, we’ll show how to customize the mapping from JWT (JSON Web Token) claims into Spring Security’s Authorities. Leave the Signing Algorithmas RS256. JWTs may be represented using the JWS Compact Oct 15, 2019 · Last modified: January 25, 2024 bezkoder Security, Spring. You might also want to check the spelling of your method names. js. For this project, choose the following things: Please add the following dependencies while creating the project: Once you click on Finish the project, open it in the Spring STS IDE application. commons. If we do not want to store the token in the database, we should keep the signature section in the token. 11. Re-run the application and follow this scenario: Authenticate with POST request at /auth/login and obtain the JWT token. spring. setExpiration(new Date(600000)) . More generally, you're writing your own security infrastructure, which is almost always a very bad idea. For example. Understand JSON Web Token. Upon successful login or registration, the user is redirected to /main. Apr 25, 2024 · Generate the project: Click on the Generate button. 🚀 Step 1: Setting Up Your Spring Boot Project. apache. The starter is configured internally to use NimbusJwtDecoder (see here ). jar or Jul 2, 2023 · All the examples i found on the internet copied this topic. getSignatureVerifier(); Jwt jwt = JwtHelper. Currently, it is in draft status as RFC 7519. Golov Pavel. – Stephen C. my questionis how can I Create an API. Jan 8, 2024 · We first create an instance of the Algorithm class. Test Spring Security JWT Authentication API. Install SDK via maven <dependency> <groupId>com. Any idea if the below code is good to do the validation? Code: Feb 15, 2020 · 1. Spring Boot Application Architecture with Spring Security. azure</groupId> <artifactId>azure-storage</artifactId> <version>8. public void testDecodeJWT(){ String jwtToken = "eyJhbGciOiJIUzI1NiJ9. Jan 3, 2024 · In this tutorial, I will show you how to build a full stack Angular 16 + Spring Boot Login and Registration with JWT example. IllegalArgumentException: Only private key data is currently supported . POM. Jul 4, 2021 · Hello Viewers,In this video, we will be seeing about how JWT or JSON Web Token is structured and encrypted. In this session, we’ll delve into the foundational elements that Oct 31, 2018 · Java support for JWT (JSON Web Tokens) used to require a lot of work: extensive customization, hours lost resolving dependencies, and pages of code just to assemble a simple JWT. g. Download and extract the generated project: Download the zip file generated by Spring Initializr. 4 version of spring boot. out. It has many useful features that are not found in JJWT. Nov 17, 2020 · In this article, I’ll explain how we can implement a JWT (JSON Web Token) based authentication layer on Spring Boot CRUD API using Spring Security. Let’s decode the access_token JWT token issued for employee1 using https: Java; Spring Boot: Select the latest stable version or keep the default selection as it is. Provide a name and an identifier for your API, for example, https://quickstarts/api. System. These are APIs that we need to provide: Jan 28, 2020 · If you want to mock JWT. String[] pieces = encodedToken. 5. expiresAt like this(in Unix Timestamp) :. This decoder is set to use the JWTValidator here and it validates the timestamp, issuer and audience parameters present in JWT. 0</version> </dependency> Jan 7, 2022 · Option2: Using jwtAuthenticationConverter () This answer shows another way to do it, using a "converter", which seems to convert the default Principal from a JWT to a custom object (that extends AbstractAuthenticationToken) that contains the JWT (. setSigningKey(secretKey) . Introduction. Add the below mentioned 3 Answers. JWT (JSON Web Token) is an open source standard commonly used to transmit data between two services in a compact and secure way. First hit to login-service > login service getting token from jwt-service > returning jwt token to UI/client. 1. auth0:java-jwt. auth0</groupId> <artifactId>jwks-rsa</artifactId> <version>0. Feb 25, 2020 · mvn clean spring-boot:run -Dspring-boot. getJcaName()); JwtBuilder builder = Jwts. The documentation has an entire chapter on how to configure the built in JWTFilter that comes with spring security, and its as easy as just adding one single line. answered May 3, 2020 at 11:26. JWTs are becoming increasingly popular on the internet especially with the javascript community. Se as credenciais forem válidas, um token JWT será criado usando o JWTTokenUtil e será fornecido ao cliente Aug 4, 2021 · A JSON file containing user data for the example Next. there are some beans for decoding access and refresh token. java-jwt library to decode JWT like in below snippet Configuración inicial de Spring Boot. One of the key processes of generating a token is applying a signature to guarantee authenticity. The exact method for validating a signature depends on the algorithm defined in the header segment and used to generate the signature itself. Next, we will configure our Authorization Server to use JwtTokenStore – as follows: @Override public void configure In previous tutorial we had implemented - Angular 7 + Spring Boot Basic Auth Using HTTPInterceptor Example to intercept all outgoing HTTP Requests and add basic authentication string to them. HMAC256( "baeldung" ); Here, we initialize an instance of an Algorithm with a secret key. Oct 20, 2016 · Our goal is to get that information programmatically - decode a JWT token in Java code. Authorization Server. After copy again the new key generated ,and paste inside your code inside the variable String rsaPrivateKey (maybe Jul 10, 2019 · Key signingKey = new SecretKeySpec(apiKeySecretBytes, signatureAlgorithm. This authorization server can be consulted by resource servers to Feb 4, 2024 · In this tutorial, I will show you how to build a full stack Angular 17 + Spring Boot Login and Registration with JWT example. May 11, 2024 · Then we’ll get into some extended features of the JJWT. Claims; import io Jan 24, 2024 · JSON Web Token (JWT) is a secure way to share information between parties in a small, self-contained format. Additionally, you'll be able to adapt and modify this implementation as your project requirements evolve. 0 Bearer Tokens: JWT; Opaque Tokens; This is handy in circumstances where an application has delegated its authority management to an authorization server (for example, Okta or Spring Authorization Server). We then had to configure it to use JwtTokenStore so that we could use JWT tokens. In this tutorial, you will learn what JWT is, how it works, and how to use it in Java. Nice tutorial. You will use the identifier as an audiencelater, when you are configuring the Access Token verification. You’ll know: Appropriate Flow for User Signup & User Login with JWT Authentication. setIssuedAt(now). ECDSA256((ECPublicKey) ecdsa256PublicKey, null); Verify its signature using the Mar 5, 2023 · NOTE: This tutorial is extension of the Spring Security JWT Authentication one, which you should follow beforehand or follow along with this article. springframework. One thing you need to be aware of when testing using this createToken () method is that your tests cannot test for a nonexistent user. After the user is successfully authenticated, we will generate a couple of JWT tokens. java jwt In this tutorial we will be learning the basic of JSON Web Token (JWT). Hence, for verifying the expiry time of a token without throwing any exceptions, we use the JWT. xml: Note that we need to add spring-security-jwt dependency to both the Authorization Server and Resource Server. In this tutorial, you will learn how to use Spring Security with JWT for REST API authentication and authorization. SecretKeyJwtDecoderBuilder for further configurations. Parameter annotated with @AuthenticationPrincipal can be of any type X and it comes from currentSecurityContext. oauth2. getPrincipal() where currentSecurityContext is of type org. Jan 8, 2024 · 1. Base64; @Test. getSubject()); Where secretKey is your signing key and token is your JWT token. html. The code demonstrated in the following sections can be found here. Sorted by: 92. Here we use Base64 decoding to decode a JWT token. Jul 31, 2017 · To verify a JWT in Java using Auth0 library (com. JWT stands for JSON Web Token. Đăng nhập lại với tài khoản kai/123456 và thực hiện thêm mới user: Gửi lại request lấy danh sách tất cả các user ta sẽ thấy có thêm user “peter”. decodeBase64(b64payload), "UTF-8"); jsonString variable contains the JSON string we’re Online tool to decode JWT. addFilterBefore(new TokenAuthenticationFilter(tokenHelper, jwtUserDetailsService), BasicAuthenticationFilter. O Spring Security é um… Nov 11, 2017 · JWT Authentication flow is very simple. Below are just three options: Build using maven goal: mvn clean package and execute the resulting artifact as follows java -jar springboot-jwt-0. Feb 28, 2022 · SpringSecurity JWT検証フロー. Jan 30, 2024 · Spring Boot is used for the backend. String username = "existentuser"; Spring Security is a powerful framework for securing Spring-based applications, but it can be challenging to set up and use. Spring Security JWT handles all of this for you automatically; use it instead. More precisely, OAuth2 Boot will create: a JwkTokenStore with the only ability to decode a JWT and verifying its signature; a DefaultTokenServices instance to use the former TokenStore; 4. JWE is essential for creating Aug 4, 2022 · We first made the key using SecureRandom and HmacKey classes. js API, the data is accessed by the users api route handlers located in the /pages/api/users folder. In addition, we will have REST endpoints for user login and registration too. Split the JWT Token . Thymeleaf is used for server-side templating. This standard offers a wide range of libraries to Dec 28, 2023 · This bean will be used to decode the JWT token. Spring Boot: 2. This post will focus on how to enable the support for handling JWTs in spring security. Oct 2, 2021 · JWT may not contain the signature section, but that would not help the server verify the token. Jan 8, 2024 · Since the method also decodes the token after verification, it provides a safer and more secure way to decode the token. 文字列としてのJWT. You will also see examples of creating, validating, and parsing JWT tokens with different libraries and frameworks. jwt, class: NimbusJwtDecoder. For example, JJWT supports only JWS, but Nimbus supports both JWS and JWE. --. Now, we want to protect the APIs at more granular level, as shown below: Here, we design that the List JWT (shortened from JSON Web Token) is the missing standardization for using tokens to authenticate on the web in general, not only for REST services. Role-based Authorization Design for APIs. Dec 8, 2017 · I would like to know the process of creation and verification of JWT signature using public and private keys in spring boot security. Spring Security will use these beans for decoding tokens in its filter Sep 9, 2022 · Spring Security supports protecting endpoints using two forms of OAuth 2. 0. 1-SNAPSHOT. Spring Initializr will generate a zip file containing your Spring Boot project. setAlgorithmheaderValue(AlgorithmIdentifiers. ③ ②のJWTを下記の流れで変換して、SpringSecurity配下でJWT情報を管理する. Background. Basically this JWT authentication layer will secure the API to avoid unauthorized API access. parseLong(Jwts. One of them is com. Use the given SecretKey to validate the MAC on a JSON Web Signature (JWS). Implementations of this interface are responsible for "decoding" a JSON Web Token (JWT) from it's compact claims representation format to a Jwt . Put the JWT token in the authorization header of the request /users/me and /users; you will get an HTTP response code 200 with the data. println("JWT: " + jwt); } Let's see what we did in the code. The front-end will be built using Angular 17 with Jan 8, 2024 · The property we added earlier translates in the creation of a couple of Spring beans. UI/Client passing received jwt token to service-b via headers> which indeed pass jwt token to service-a, where each service independently calls is_token_valid() of jwt-service and process the request only after getting success Apr 24, 2020 · Get Token using Postman. security. port=8082. jsonwebtoken. I also found another tutorial for achieving Single Sign On for Java based applications. However, the OAuth stack has been deprecated by Spring and now we’ll be using Keycloak as our Jul 31, 2018 · First, Nimbus JWT is comprehensive. Android applications should use JWTDecode. User obtains Refresh and Access tokens by providing credentials to the Authorization server. Okay, Done! Download code ví dụ Jan 10, 2018 · We can get expire time of a JWT with . A JWT is a string representing a set of claims as a JSON object. In your controller, get the JWT token from the request header. val jwtExample = JWT("your string token") jwtExample. Welcome to our exploration of Spring Security and JWT Authentication within a Spring Boot framework. io/) or your preferred IDE to create a new project with Feb 18, 2024 · Feb 18, 2024. 1EI2haSz9aMsHjFUXNVz2Z4mtC0nMdZo6bo3-x-aRpw"; Mar 22, 2024 · The Spring Security framework provides methods of integrating JWT to secure REST APIs. ↓. Sep 4, 2022 · Sep 4, 2022. Let us split the parts using String split method. getAuthorization(). Import the project into your IDE: Apr 28, 2022 · We are going to create 2 users and login with them. I am building JWT with hardcoded secret "MYSECRET". 8. This is because createToken () only makes a JWT token based off of the string you put into it. I'm implementing JWT token-based authentication. Para comenzar a implementar autorización y autenticación JWT en Java Spring Boot, es necesario tener una configuración inicial en el proyecto. In this tutorial, we'll build token-based authentication and role-based authorization using Spring Boot 3, Spring Security, JWT, and a MySQL database. Since HS256 uses a symmetric key, we only need one key that we will use to sign and verify the JWT. Android. JWTs can be signed using a secret code with HMAC or with RSA's public/private key pairs. claim("uuid", id). core May 25, 2021 · I'm trying to get an Access Token from Keycloak over SpringBoot and did try the following example. microsoft. In this tutorial, we’ll use the HMAC256 algorithm to sign our JWT: Algorithm algorithm = Algorithm. You have to add an authentication filter to your HttpSecurity configuration: . If you already know how JWT works, and just want to see the implementation, you can skip ahead, or see the source code on Github. MySQL, MongoDB, PostgreSQL etc) to keep the example simple and focused on the implementation of JWT authentication in Next. final PublicKey ecdsa256PublicKey = getPublicKey(); final Algorithm algorithm = Algorithm. Add the access token in the Authorization header to access now the /employees endpoint. Previously, the Spring Security OAuth stack offered the possibility of setting up an Authorization Server as a Spring Application. Feb 8, 2024 · 2. Bearer isn't part of the token, it's the authentication scheme. When a properly configured Spring Security-based application receives a request, it goes through a series of steps that, in essence, aims at two goals: Authenticate the request, so Aug 8, 2019 · Of course, I could split-&-Base64-decode the token myself but it feels like the most basic functionality one would expect from a JWT-library; hence I suspect I am missing something. Before you start , use this command on linux box in order to convert your RSA private key in the correct format : copy and paste your key in a file and launch : openssl pkcs8 -topk8 -nocrypt -in privatekeyOLD -out privatekeyNEW. ECDSA256((ECPublicKey) ecdsa256PublicKey, null); Verify its signature using the Feb 14, 2024 · Step 1: Create a new Spring Boot project in the Spring STS IDE application and open it. JavaScript handles client-side interactions. Most Resource Server support is collected into spring-security-oauth2-resource-server. ‍. RELEASE. Aug 5, 2023 · Create a Spring Boot Java application and make the below mentioned changes to decode JWT tokens using Spring Security (OAuth 2. For the HS256 signing algorithm, a private key is shared between two entities, say your application's server and an authentication server. I am trying to validate JWT token using HMAC algorithm. if you want to validate Azure AD access token, we can try to use the sdk java-jwt and jwks-rsa to implememnt it. Aug 4, 2023 · In this guide, we will walk through implementing JWT authentication in a Spring Boot app, using a simplified yet effective methodology. binary. Sep 26, 2018 · I am trying to verify a jwt token and getting the exception: Exception in thread "main" java. 2. Nikhil Badgu • 4 years ago. We do not require any token to access these APIs but all the other APIs to perform SignatureVerifier verifier = jwkDefinitionHolder. In next tutorial we will be implementing Spring Boot +JWT + MYSQL Hello World Example JWT stands for JSON Web Token. expiresAt Then we can define a fun for evaluating JWT like this : Jan 24, 2021 · Here are the short answers: Use any library you like to convert encoded JWT into an object. I am using com. We will build a Spring Boot application in that: User can signup new account, or login with username & password. May 19, 2020 · I looked through java-jwt and I don't think that it outputs the payload and header JSON Strings other than base64-encoded. For issues on non-LTS versions above 8, consideration will be given on a case-by-case basis. I decided to use a JSON file to store data instead of a database (e. Step 5: Login to Service Provider Sep 18, 2021 · There is good example code from bfwg/angular-spring-starter. This JWT will then be used to secure subsequent API requests. JWT:https://jwt. 2. We'll cover controllers, services, configurations, and repositories, ensuring you're well-equipped to enhance your app's security. split("\\. class); The the TokenAuthenticationFilter class does this work. Lo primero es instalar las dependencias necesarias en el archivo pom. Also, the "normal" JSON strings are just temporary local Strings in the cunstructor of JWTDecoder (see here) and private inaccessible fields of JWTCreator (see here) which never get "exposed to the public". Front-end with Vue. Dec 11, 2017 · I am using java-jwt plugin to generate jwt token from my spring boot services and i am succesfully able to do that. builder(). We'll start by creating a Login REST API to authenticate users, generate a JWT, and return it in the response. Any pointers on how to verify a jwt token with public key? Jan 17, 2024 · Now if we try to access one of our endpoints, we will get the unauthorized message: Send a request to /api/auth/login with the username and password in the request body, and we will get an access token. I have to validate the token against a Public Key which is stored in a different server. Mar 6, 2024 · 1. Let’s begin by creating a new Spring Boot application by either using Spring Initializr ( https://start. Aug 13, 2019 · In this article, we will learn about securing reactive REST endpoints with spring Webflux security. But I have a situation where I am adding some user specific information in the token and while validating it I am trying to get that information by decoding the token and building the verifier to validate the token. Check your spelling, and/or that you don't have the concepts mixed up. 6. io/ Git link for this project:htt Jan 5, 2018 · My browser client request keycloak to generate JWT and then sends this JWT to my ZUUL server which validates JWT using keycloak-spring adapter and then i have written a pre-filter to decodes JWT payload and extract username. parseClaimsJws(token) . May 3, 2020 · If the userID is in the "sub" claim, you can receive it in the following way using this library: Long userID = Long. Previously, we have only public and secure APIs. Does someone know another approach to get an Access Token? Jun 28, 2023 · First, we need to add spring-security-jwt dependency to our pom. The front-end will be built using Angular 16 with Jan 18, 2021 · What you are decoding isn't the token, you're trying to decode the entire header value. We will implement token-based authentication and authorization using JWT provider. signWith(signatureAlgorithm, signingKey); Note : My "SECRET_KEY" is a string which is a private key generated randomly online . on dt uk al ac uz ub fo wt vr