XFA表单的数字签名 [英] Digital Signing of XFA forms

问题描述

我想以编程方式签署在Adobe Livecycle(它是XFA格式)中创建的PDF文档.

I'd like to sign PDF documents created in Adobe Livecycle (it is XFA form) programmatically.

我知道用于处理PDF的iText库，但是还没有找到如何签名的示例.

I know about iText library for manipulating with PDFs, but I haven't found any example how to sign it yet.

也许它还不被支持.您知道其他可以做到这一点的Java库吗?还是您知道如何签名?

Maybe its not supported yet. Do you know any other Java library which can do that? Or do you know a way how to sign it?

我知道，我的问题是类似，但是我不需要使用iText.

I know, my question is similar to this opened question, but I don't need the use of iText.

非常感谢您的帮助！

推荐答案

这是一个小示例，展示了如何使用XmlDSig进行签名:

This is a small example showing how to sign using XmlDSig:

PdfReader reader =new  PdfReader(src);
FileOutputStream os =new  FileOutputStream(dest);
PdfStamper stamper = PdfStamper.createXmlSignature(reader, os);
XmlSignatureAppearance appearance = stamper.getXmlSignatureAppearance();
appearance.setXmlLocator(new  XfaXmlLocator(stamper));
appearance.setXpathConstructor(new XfaXpathConstructor(XfaXpathConstructor.XdpPackage.Datasets));
ExternalSignature signature =new  PrivateKeySignature(pk, digestAlgorithm,"BC");
//use signXmlDSig or signXades
MakeXmlSignature.signXmlDSig(appearance, signature, chain);

您也可以使用XAdES进行签名，但是由于我认为Adobe已经不支持XAdES(如果我错了，请更正)，您将无法在Adobe软件中验证签名.

You can also sign using XAdES, but then you won't be able to validate the signature in Adobe software because I don't think Adobe already supports XAdES (please correct me if I'm wrong).

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