Java

Create JWT Using HS256, HS384, or HS512

See more JSON Web Token (JWT) Examples

Demonstrates how to create a JWT using HS256, HS384, or HS512. (HS256 is JWT's acronym for HMAC-SHA256.) When HMAC is used, the secret is a shared secret (i.e. password) that both client and server know beforehand.

This example also demonstrates how to include time constraints:

• nbf: Not Before Time
• exp: Expiration Time
• iat: Issue At Time

Chilkat2 Java

import com.chilkatsoft.chilkat2.JsonObject;
import com.chilkatsoft.chilkat2.Jwt;

public class ChilkatExample {

    public static void main(String[] args) {
        // Demonstrates how to create an HMAC JWT using a shared secret (password).

        // This example requires the Chilkat API to have been previously unlocked.
        // See Global Unlock Sample for sample code.

        Jwt jwt = new Jwt();

        // Build the JOSE header
        JsonObject jose = new JsonObject();
        // Use HS256.  Pass the string "HS384" or "HS512" to use a different algorithm.
        jose.appendString("alg", "HS256");
        jose.appendString("typ", "JWT");

        // Now build the JWT claims (also known as the payload)
        JsonObject claims = new JsonObject();
        claims.appendString("iss", "http://example.org");
        claims.appendString("sub", "John");
        claims.appendString("aud", "http://example.com");

        // Set the timestamp of when the JWT was created to now.
        int curDateTime = jwt.genNumericDate(0);
        claims.addIntAt(-1, "iat", curDateTime);

        // Set the "not process before" timestamp to now.
        claims.addIntAt(-1, "nbf", curDateTime);

        // Set the timestamp defining an expiration time (end time) for the token
        // to be now + 1 hour (3600 seconds)
        claims.addIntAt(-1, "exp", curDateTime + 3600);

        // Produce the smallest possible JWT:
        jwt.setAutoCompact(true);

        String strJwt = jwt.createJwt(jose.emit(), claims.emit(), "secret");

        System.out.println(strJwt);
    }
}