imesh / jwt-jwk-key-generator

JWT JWK Key Generator

JWT JWK Key Generator

This is Java program written using Nimbus JOSE+JWT library based on this article for generating JWK keys.

Code

// Generate EC key pair
ECKey keyPair = ECKeyManager.generateECKey("123456789", JWSAlgorithm.ES256, KeyUse.SIGNATURE);
System.out.println("EC Key Pair: " + keyPair);
System.out.println("EC Public Key: " + keyPair.toPublicJWK());

// Generate JWT using EC key pair
String subject = "jwt";
String issuer = "https://jwk.example.com";
String jwt = ECKeyManager.generateJWT(keyPair, subject, issuer);
System.out.println("JWT: " + jwt);

// Verify JWT and retrieve JWT claim set
JWTClaimsSet jwtClaimsSet = ECKeyManager
    .verifyJWT(jwt, keyPair.toPublicJWK(), JWSAlgorithm.ES256, subject, issuer);

// Verify the JWT claims and expiry date
assertEquals(subject, jwtClaimsSet.getSubject());
assertEquals(issuer, jwtClaimsSet.getIssuer());
assertTrue(new Date().before(jwtClaimsSet.getExpirationTime()));

How to Run

1. Clone this Git repository:

   git clone https://github.com/imesh/jwt-jwk-key-generator

2. Execute using Maven:

   cd jwt-jwk-key-generator
   mvn exec:java -Dexec.mainClass="imesh.examples.jwt.Main"

   An example output:

    EC Key Pair: {
        "kty":"EC",
        "d":"gEJtMNAEKSnnNRfdwKVEtE9C2-Bdm3gvDbhU_53xk-I",
        "use":"sig",
        "crv":"P-256",
        "kid":"123456789",
        "x":"OqHlA-v92dZT1fJW5V_itda2PKfrQvS6QIDXOGiU44o","y":"MYkqs6sxJOQMc9R-jabCRcNRtjn8YBUNCrkp8C4n7rY","alg":"ES256"}
   
    EC Public Key: {
        "kty":"EC",
        "use":"sig",
        "crv":"P-256",
        "kid":"123456789",
        "x":"OqHlA-v92dZT1fJW5V_itda2PKfrQvS6QIDXOGiU44o","y":"MYkqs6sxJOQMc9R-jabCRcNRtjn8YBUNCrkp8C4n7rY","alg":"ES256"}
   
    JWT: eyJraWQiOiIxMjM0NTY3ODkiLCJhbGciOiJFUzI1NiJ9.eyJpc3MiOiJodHRwczpcL1wvandrLmV4YW1wbGUuY29tIiwic3ViIjoiand0IiwiZXhwIjoxNjMwNzY0MDAwfQ.DasBQS2CG-GzkIB_OQ09OXP4lKzU7ce2L7rFFIf3XqKKsPdTQ-LI8dapOvhCa5MwH_uDhHmtNKw1D-qFmxnnlw