Create S/MIME Detached Signature with PFX

How to use a PFX to create a signed S/MIME message.

Download Chilkat Java Library

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[])
  {

    CkMime mime = new CkMime();

    boolean success;
    success = mime.UnlockComponent("Anything for 30-day trial");
    if (success == false) {
        System.out.println("Failed to unlock component");
        return;
    }

    mime.AddHeaderField("Subject","This is a test");
    mime.AddHeaderField("Abc","123");

    mime.SetBodyFromPlainText("This is the body");

    CkCertStore certStore = new CkCertStore();

    String password;
    password = "myPassword";
    success = certStore.LoadPfxFile("chilkat.pfx",password);
    if (success == false) {
        System.out.println(certStore.lastErrorText());
        return;
    }

    CkCert cert;
    cert = certStore.FindCertBySubjectCN("Chilkat Software, Inc.");
    if (cert == null ) {
        System.out.println("Failed to find certificate!");
        return;
    }

    //  Display the full distinguished name of the cert.
    System.out.println(cert.subjectDN());

    success = mime.AddDetachedSignature(cert);
    if (success == false) {
        System.out.println(mime.lastErrorText());
        return;
    }

    System.out.println(mime.getMime());


  }
}