Java 如何从XMLSignature获取证书链（根和中间层）

您好，我刚刚从一个符合xmldsig w3c建议的xml构建了一个org.apache.xml.security.signature.XMLSignature，我可以看到xml中包含所有证书链

<ds:KeyInfo>
<ds:X509Data>
<ds:X509Certificate>

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元素，但使用XMLSignature API，我可以看到我只能访问用户证书和颁发者证书，而不能访问整个链，有没有一种简单的方法可以通过xmlsec API实现这一点？

我找到了一个解决方案，不是最干净的，但它可以工作：

XMLSignature signature = new XMLSignature(sigElement,
                null);
        KeyInfo keyInfo = signature.getKeyInfo();
        NodeList x509Certificates = keyInfo.getElement().getElementsByTagNameNS("http://www.w3.org/2000/09/xmldsig#", "X509Certificate");

        ArrayList<X509Certificate> allCertificates = new ArrayList<X509Certificate>();
        for (int i = 0; i < x509Certificates.getLength(); i++) {
            Node x509CertificateElement = x509Certificates.item(i);
            byte[] decodedX509Certificate = Base64.decode(x509CertificateElement.getTextContent());
            X509Certificate x509Certificate = (X509Certificate) CertificateFactory.getInstance("X509").generateCertificate(new ByteArrayInputStream(decodedX509Certificate));
            allCertificates.add(x509Certificate);
        }

        // now you have all certificates in allCertificates