Xades4j and Base64 in EnvelopedXmlObject

问题

I tried to insert Base64 string into Object in EnvelopedXmlObject:

    DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance();
    dbFactory.setNamespaceAware(true);        
    DocumentBuilder dBuilder = dbFactory.newDocumentBuilder();
    Document document = dBuilder.newDocument();  
    String generatedDocument = ...;

    BASE64Encoder encoder = new BASE64Encoder();
    String generatedDocumentEncoded = encoder.encode(generatedDocument .getBytes("UTF-8"));
    Node node1 = document.createTextNode(generatedDocumentEncoded);
    DataObjectDesc dataObjectDesc = new EnvelopedXmlObject   (node1, "plain/text", "http://www.w3.org/2000/09/xmldsig#base64");
    ....

When i run this code in file.xml each line of Object is ended with "" which cause an error with decoding text

When I add this lines: Node node1 = document.createTextNode(generatedDocumentEncoded);

saveFile("c:\\temp\\temp.xml", generatedDocumentEncoded);
String stringFromFile = read("c:\\temp\\temp.xml");
node1.setTextContent(stringFromFile);

then generated file is ok - where is my mistake ? :)

回答1:

I think that Base64 encoder You use will produce chunked output (put carriage returns in string). You can replace in output string this characters like below:

generatedDocumentEncoded = generatedDocumentEncoded.replaceAll("(\r\n|\n)", "");
Node node1 = document.createTextNode(generatedDocumentEncoded);

or force Your BASE64Encoder generate not chunked output. I'm using for that Base64 class from Apache Commons:

byte[] bytes = generatedDocument.getBytes("UTF-8");
String generatedDocumentEncoded = new String(Base64.encodeBase64(bytes, false), "UTF8");

来源：https://stackoverflow.com/questions/26293066/xades4j-and-base64-in-envelopedxmlobject

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