Encrypt StringBuilder Content to a JWE

See more JSON Web Encryption (JWE) Examples

Demonstrates Jwe.EncryptSb, which encrypts content supplied in a StringBuilder and writes the resulting JWE into another StringBuilder.

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;

    CkJwe jwe = new CkJwe();

    //  Set the JWE protected header, specifying the key-management algorithm (alg) and the content-
    //  encryption algorithm (enc).
    CkJsonObject header = new CkJsonObject();
    header.UpdateString("alg","A256KW");
    header.UpdateString("enc","A256GCM");
    success = jwe.SetProtectedHeader(header);
    if (success == false) {
        System.out.println(jwe.lastErrorText());
        return;
        }

    //  The 256-bit key-wrapping key (base64) for recipient index 0.  In production, obtain the key
    //  from a secure source rather than hard-coding it.
    String base64Key = "YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4eXowMTIzNDU=";
    success = jwe.SetWrappingKey(0,base64Key,"base64");
    if (success == false) {
        System.out.println(jwe.lastErrorText());
        return;
        }

    //  Encrypt content supplied in a StringBuilder, writing the resulting JWE into another StringBuilder.
    CkStringBuilder sbContent = new CkStringBuilder();
    sbContent.Append("This is the secret content.");

    CkStringBuilder sbJwe = new CkStringBuilder();
    success = jwe.EncryptSb(sbContent,"utf-8",sbJwe);
    if (success == false) {
        System.out.println(jwe.lastErrorText());
        return;
        }

    System.out.println(sbJwe.getAsString());
  }
}