protected Document encrypt(Document doc) throws GeneralSecurityException, IOException {
ByteArrayOutputStream os = new ByteArrayOutputStream();
OutputStreamWriter writer = new OutputStreamWriter(os);
XMLOutputter out = new XMLOutputter(Format.getPrettyFormat());
out.output(doc, writer);
writer.close();
byte[] crypt = dodes(os.toByteArray(), Cipher.ENCRYPT_MODE);
Document secureDoc = new Document();
Element root = new Element(PROTECTED_QBEAN);
secureDoc.setRootElement(root);
Element secureData = new Element("data");
root.addContent(secureData);
secureData.setText(ISOUtil.hexString(crypt));
return secureDoc;
}
