java - 如何从 XMLSignature 获取证书链（根证书和中间证书）

Question

嗨，我刚刚从符合 xmldsig w3c 建议的 xml 构造了一个 org.apache.xml.security.signature.XMLSignature，我可以看到 xml 包含所有证书链

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

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，而不是完整的链，有没有一种直接的方法可以通过 xmlsec API 完成这项工作？

Answer 1

我找到了一个解决方案，不是最干净的，但它有效：

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