Проверьте XML-подпись с помощью libxmlsec1

Я могу проверить подпись XML с помощью безопасности Apache Santuario XML для Java. Код похож на:

ByteArrayInputStream bais = new ByteArrayInputStream(readData("signature.xml"));
DocumentBuilderFactory f = DocumentBuilderFactory.newInstance();
f.setNamespaceAware(true);
Document doc = f.newDocumentBuilder().parse(bais);
bais.close();
NodeList nodes = doc.getElementsByTagNameNS(Constants.SignatureSpecNS, Constants._TAG_SIGNATURE);
Element sigElement = (Element) nodes.item(0);
XMLSignature signature = new XMLSignature(sigElement, "");
signature.addResourceResolver(new ResolverWidget(this));
X509Certificate cert = signature.getKeyInfo().getX509Certificate();
signature.checkSignatureValue(cert);

Теперь я хочу реализовать это на C ++. Я пробовал Apache Santuario XML security для C ++, но не получилось, потому что было сказано, что он не поддерживает c14n11 (надеюсь, я ошибаюсь). Итак, я перешел на использование libxmlsec1, но проблема в том, что я не знаю, как реализовать с помощью libxmlsec1. Не нужно проверять все файлы элемента Reference. Я просто хочу проверить элемент SignedInfo. Я только сделал следующий код.

xmlDocPtr doc = xmlParseFile("signature.xml");
xmlNodePtr node = xmlSecFindNode(xmlDocGetRootElement(doc), xmlSecNodeX509Certificate, xmlSecDSigNs);
xmlNodePtr data = node->children;
mngr = xmlSecKeysMngrCreate();
xmlSecCryptoAppDefaultKeysMngrInit(mngr);
xmlSecCryptoAppKeysMngrCertLoadMemory(mngr, data->content, size, xmlSecKeyDataFormatPem, xmlSecKeyDataTypeTrusted);

Это терпит неудачу со следующими ошибками:

func=xmlSecOpenSSLAppCertLoadBIO:file=app.c:line=1254:obj=unknown:subj=PEM_read_bio_X509_AUX:error=4:crypto library function failed:
func=xmlSecOpenSSLAppKeysMngrCertLoadBIO:file=app.c:line=1139:obj=unknown:subj=xmlSecOpenSSLAppCertLoadBIO:error=1:xmlsec library function failed:
func=xmlSecOpenSSLAppKeysMngrCertLoadMemory:file=app.c:line=1091:obj=unknown:subj=xmlSecOpenSSLAppKeysMngrCertLoadBIO:error=1:xmlsec library function failed:

Кто-нибудь знает, как заставить xmlsec1 читать все элементы x509Certificate из signature.xml и проверять signature.xml?

Ниже приведен файл signature.xml.

<?xml version="1.0" encoding="UTF-8"?>
<Signature xmlns="http://www.w3.org/2000/09/xmldsig#" Id="DistributorSignature">
<SignedInfo>
<CanonicalizationMethod Algorithm="http://www.w3.org/2006/12/xml-c14n11"/>
<SignatureMethod Algorithm="http://www.w3.org/2001/04/xmldsig-more#rsa-sha256"/>
<Reference URI="config.xml">
<DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256"/>
<DigestValue>ddnUD1cNeIG1a3uj96Y/VS+WBC5qT24PL/j/91Tfl/0=</DigestValue>
</Reference>
<Reference URI="index.html">
<DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256"/>
<DigestValue>I+Sv8L0e9Px1aMAdlo5a2uQjXecYjv7wIyJxP50h8Fk=</DigestValue>
</Reference>
<Reference URI="LICENSE">
<DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256"/>
<DigestValue>HVThAjM5iEcTVJB6dgC5zehhQjYVu1JV7oN+OyezI2Y=</DigestValue>
</Reference>
<Reference URI="#prop">
<Transforms>
<Transform Algorithm="http://www.w3.org/2006/12/xml-c14n11"/>
</Transforms>
<DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256"/>
<DigestValue>rf75zmIiY5uFijILpSBnhNEZA+5twK1OqDhjA/yri/A=</DigestValue>
</Reference>
</SignedInfo>
<SignatureValue>Kbbugd59Tj/M1MhsWySrQAeTwz8zhf4RqQsO+xRInqsdDQdhv5vqaNqJOAWStYcr
g26RD426JcJc3P7qy2C8VHuZMQ30krrwCbaQcNIptjBD83xAbOzUu2ZiHmadNJFQ
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jd67IdmbzRr6jpPx4A/H9w==</SignatureValue>
<KeyInfo>
<X509Data><X509Certificate>MIIDlDCCAnygAwIBAgIBAjANBgkqhkiG9w0BAQsFADBPMQswCQYDVQQGEwJVSzEQ
MA4GA1UECBMHRW5nbGFuZDEMMAoGA1UEChMDVzNDMRAwDgYDVQQLEwdXZWJhcHBz
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Vkz5ajGl/zk=</X509Certificate>
<X509Certificate>MIIDlDCCAnygAwIBAgIBAjANBgkqhkiG9w0BAQsFADBPMQswCQYDVQQGEwJVSzEQ
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</KeyInfo>
<Object Id="prop">
<SignatureProperties xmlns:dsp="http://www.w3.org/2009/xmldsig-properties">
<SignatureProperty Id="profile" Target="#DistributorSignature">
<dsp:Profile URI="http://www.w3.org/ns/widgets-digsig#profile"/>
</SignatureProperty>
<SignatureProperty Id="role" Target="#DistributorSignature">
<dsp:Role URI="http://www.w3.org/ns/widgets-digsig#role-author"/>
</SignatureProperty>
<SignatureProperty Id="identifier" Target="#DistributorSignature">
<dsp:Identifier>61622c00-0e67-11e4-aec7-af2396515bcf</dsp:Identifier>
</SignatureProperty>

<SignatureProperty Id="created" Target="#DistributorSignature">
<dsp:Created>2011-06-10T18:13:51.0Z</dsp:Created>
</SignatureProperty>
<SignatureProperty Id="expires" Target="#DistributorSignature">
<dsp:Expires>2050-01-02T10:00:00.0Z</dsp:Expires>
</SignatureProperty>
<SignatureProperty Id="replayprotect" Target="#DistributorSignature">
<dsp:ReplayProtect>
<dsp:timestamp>2011-06-10T18:13:51.0Z</dsp:timestamp>
<dsp:nonce>ax87au3</dsp:nonce>
</dsp:ReplayProtect>
</SignatureProperty>
</SignatureProperties>
</Object>
</Signature>