Sign a JWS with a Private Key

See more JSON Web Signatures (JWS) Examples

Demonstrates Jws.SetPrivateKey, which sets the private key used to create a signature. The example uses RS256 (RSASSA-PKCS1-v1_5 with SHA-256).

The file path is relative to the application's current working directory. An absolute path may also be used. Supply the path appropriate to your own environment.

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

public class ChilkatExample {

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

        // Protected header specifying RSASSA-PKCS1-v1_5 with SHA-256 (RS256).
        JsonObject header = new JsonObject();
        header.updateString("alg", "RS256");
        try {
            jws.setProtectedHeader(0, header);
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

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

        // The file path is relative to the application's current working directory.  An absolute path
        // may also be used.  Supply the path appropriate to your own environment.
        // Load the signer's private key and set it for signature 0.
        PrivateKey privKey = new PrivateKey();
        String jwsCompact;
        try {
            privKey.loadPemFile("qa_data/signer_privkey.pem");

            jws.setPrivateKey(0, privKey);

            jwsCompact = jws.createJws();
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        System.out.println(jwsCompact);
    }
}