Xades4j - XML签名验证错误

Question

我收到带有Xades EPES签名的XML发票，我必须控制它。所以我尝试用Xades4j来做。我已经修复了很多错误，但我卡住了错误:

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)

用来验证签名的Java代码:

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，我可以发布一种XML文件的摘录，我试图在匿名后验证。

谢谢。我已经看过并尝试了所有我发现的(在网上，xades4j的例子，xades4j junit类…)，但似乎没有解决我的错误。

Answer 1

您需要像这样指定您自己的策略文档提供程序:p.withPolicyDocumentProvider()。您必须实现自己的策略提供程序，它实现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。可以是FileInputStream

:

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
        }
    }
}