Set the Optional JWS Unprotected Header

See more JSON Web Signatures (JWS) Examples

Demonstrates Jws.SetUnprotectedHeader, which sets the optional unprotected header for a signature.

import com.chilkatsoft.*;

public class ChilkatExample {

  static {
    try {
        System.loadLibrary("chilkat");
    } catch (UnsatisfiedLinkError e) {
      System.err.println("Native code library failed to load.\n" + e);
      System.exit(1);
    }
  }

  public static void main(String argv[])
  {
    boolean success = false;

    CkJws jws = new CkJws();

    //  Protected header specifying HMAC-SHA256.
    CkJsonObject header = new CkJsonObject();
    header.UpdateString("alg","HS256");
    success = jws.SetProtectedHeader(0,header);
    if (success == false) {
        System.out.println(jws.lastErrorText());
        return;
        }

    //  Set the optional unprotected header for signature 0.  Unlike the protected header, it is not
    //  covered by the signature.  It is carried in the JSON serialization forms of a JWS.
    CkJsonObject unprotected = new CkJsonObject();
    unprotected.UpdateString("kid","signer-key-1");
    success = jws.SetUnprotectedHeader(0,unprotected);
    if (success == false) {
        System.out.println(jws.lastErrorText());
        return;
        }

    boolean bIncludeBom = false;
    success = jws.SetPayload("This is the content to sign.","utf-8",bIncludeBom);
    if (success == false) {
        System.out.println(jws.lastErrorText());
        return;
        }

    String base64Key = "YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4eXowMTIzNDU=";
    success = jws.SetMacKey(0,base64Key,"base64");
    if (success == false) {
        System.out.println(jws.lastErrorText());
        return;
        }

    //  Because an unprotected header is present, the JWS is produced in a JSON serialization form.
    String jwsJson = jws.createJws();
    if (jws.get_LastMethodSuccess() == false) {
        System.out.println(jws.lastErrorText());
        return;
        }

    System.out.println(jwsJson);
  }
}