Java

Create a JWS

See more JSON Web Signatures (JWS) Examples

Demonstrates Jws.CreateJws, which creates and returns a JWS from the current payload, headers, and signing key.

Background. JWS (JSON Web Signature) integrity-protects a payload with a signature or MAC. The header alg names the algorithm; this example uses HMAC-SHA256 (HS256) with a symmetric MAC key.

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import com.chilkatsoft.chilkat2.ChilkatException;
import com.chilkatsoft.chilkat2.JsonObject;
import com.chilkatsoft.chilkat2.Jws;

public class ChilkatExample {

    public static void main(String[] args) {
        Jws jws = new Jws();

        // Set the protected header for signer 0, specifying the signature algorithm (alg).
        JsonObject header = new JsonObject();
        header.updateString("alg", "HS256");
        try {
            jws.setProtectedHeader(0, header);
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        // Set the payload to be signed.
        boolean bIncludeBom = false;
        try {
            jws.setPayload("This is the content to sign.", "utf-8", bIncludeBom);
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        // Provide the HMAC key (base64) for signer 0.  In production, obtain the key from a secure source
        // rather than hard-coding it.
        String base64Key = "YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4eXowMTIzNDU=";
        String jwsCompact;
        try {
            jws.setMacKey(0, base64Key, "base64");

            // Create the JWS from the current payload, headers, and signing key.  The returned string is the
            // JWS (compact serialization by default).
            jwsCompact = jws.createJws();
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        System.out.println(jwsCompact);
    }
}