final BCPGOutputStream outputStream = new BCPGOutputStream(generator.open(armoredOutputStream));
signatureGenerator.generateOnePassVersion(false).encode(outputStream);
encode(licensePlain, using(signatureGenerator), to(outputStream));
signatureGenerator.generate().encode(outputStream);
generator.close();
armoredOutputStream.close();
return new String(byteArrayOutputStream.toByteArray());
}