Set the JWS Protected Header

See more JSON Web Signatures (JWS) Examples

Demonstrates Jws.SetProtectedHeader, which sets the integrity-protected header for a signer from a JsonObject. The header specifies the signature algorithm (alg).

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();

    //  Build the JWS protected header.  The "alg" member names the signature algorithm.
    CkJsonObject header = new CkJsonObject();
    header.UpdateString("alg","HS256");

    //  Set the protected header for signer index 0.  The protected header is integrity-protected: it is
    //  covered by the signature.
    success = jws.SetProtectedHeader(0,header);
    if (success == false) {
        System.out.println(jws.lastErrorText());
        return;
        }

    System.out.println("Protected header set.");
  }
}