byte[] result =  createMixedSignatureWith2Signers(
                    iConfiguration, SimpleConfiguration.getTempFileName(null), "BMCKLPZSZHWOEZGITRZRTSMIYUZJPA");
            System.out.println((new Encoder()).encode(result));
            System.out.println(Base64.getEncoder().encodeToString(result));
            System.out.println(new String(Base64.getEncoder().encodeToString(result).getBytes()));

public static byte[] createMixedSignatureWith2Signers(IConfiguration
                                                                       config, String outFileName, String data) throws Exception {

        CAdESSignature cadesSignature = new CAdESSignature(config.detached());

        cadesSignature.setCertificateStore(config.getCertificateStore());
        cadesSignature.setCRLStore(config.getCRLStore());
        cadesSignature.addSigner(
                JCSP.PROVIDER_NAME, // signature provider // провайдер подписи
                config.getDigestOid(),//null,
                config.getPublicKeyOid(), //null,
                config.getPrivateKey(), // signing key // ключ подписанта
                config.getChain(),      // signing certificate chain // цепочка сертификатов подписанта
                CAdESType.CAdES_BES,
                null,
                false,
                config.getSignedAttributes(), //null,
                config.getUnsignedAttributes(),//null,  //null,
                config.getCRLs(),//null, //config.getCRLs(),//null, // no CRL files
                true  // add the signing certificate chain to the signature // добавить цепочку подписанта в подпись
        );
       
        ByteArrayOutputStream signatureStream
                = new ByteArrayOutputStream();

        try {

            cadesSignature.open(signatureStream);
            cadesSignature.update(data.getBytes(StandardCharsets.UTF_8));
            FileOutputStream fos = new FileOutputStream("sign9");
            fos.write(Base64.getEncoder().encodeToString(signatureStream.toByteArray()).getBytes());
            fos.close();
            //cadesSignature.close();

        } finally {
            signatureStream.close();
        }

        return signatureStream.toByteArray();
}