Xades4j - XML签名验证错误- SignaturePolicyNotAvailableException

Question

我收到带有Xades签名的XML发票，我必须控制它。所以我试着用Xades4j做这件事。我修正了很多错误，但我坚持错误：

errxades4j.verification.SignaturePolicyNotAvailableException: Verification failed for property 'SignaturePolicyIdentifier': signature policy document is not available
    at xades4j.verification.SignaturePolicyVerifier.verify(SignaturePolicyVerifier.java:67)
    at xades4j.verification.SignaturePolicyVerifier.verify(SignaturePolicyVerifier.java:38)
    at xades4j.verification.QualifyingPropertiesVerifierImpl.verifyProperties(QualifyingPropertiesVerifierImpl.java:58)
    at xades4j.verification.XadesVerifierImpl.verify(XadesVerifierImpl.java:202)

Java代码用于验证签名：

FileInputStream fis = new FileInputStream("keystore.jks");
KeyStore trustAnchors = KeyStore.getInstance("jks");
trustAnchors.load(fis,"password".toCharArray());
fis.close();

CertificateValidationProvider certValidator = new PKIXCertificateValidationProvider(trustAnchors, false);
XadesVerificationProfile p = new XadesVerificationProfile(certValidator);
XadesVerifier v = p.newVerifier();

DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
dbf.setNamespaceAware(true);
DocumentBuilder db =  dbf.newDocumentBuilder();
FileInputStream is = new FileInputStream(filename);
Document doc = db.parse(is);

Element sigElem = (Element)doc.getElementsByTagNameNS(Constants.SignatureSpecNS, Constants._TAG_SIGNATURE).item(0);
XAdESVerificationResult r = null;
r = v.verify(sigElem,null);

如果有必要的话，我可以在匿名之后发布一份XML文件的摘录。

谢谢。我已经查找并尝试了我所找到的一切(在网络上，xades4j示例，xades4j junit类.)但似乎什么也解决不了我的错误。

Answer 1

您需要指定您自己的策略文档提供程序，如：p.withPolicyDocumentProvider()。您还必须实现您自己的策略提供程序，它实现了SignaturePolicyInfoProvider和SignaturePolicyDocumentProvider接口。(至少我是那样做的)

编辑您的评论：

您需要实现SignaturePolicyInfoProvider.getSignaturePolicyDocumentStream()，它返回一个InputStream。这可以是一个FileInputStream

示例

public class FilebasedSignaturePolicyProvider implements  SignaturePolicyDocumentProvider {

    @Override
    public InputStream getSignaturePolicyDocumentStream(ObjectIdentifier sigPolicyId) {
        String oid = sigPolicyId.getIdentifier();

        try {
            return new FileInputStream("directory-to-my-policy-files/" + oid);
        } catch (FileNotFoundException e) {
            // handle error
        }
    }
}