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TslUtils.java
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TslUtils.java
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/*
* Copyright 2023 gematik GmbH
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package de.gematik.pki.gemlibpki.tsl;
import static javax.xml.crypto.dsig.XMLSignature.XMLNS;
import de.gematik.pki.gemlibpki.exception.GemPkiRuntimeException;
import de.gematik.pki.gemlibpki.utils.CertReader;
import eu.europa.esig.trustedlist.jaxb.tsl.MultiLangStringType;
import eu.europa.esig.trustedlist.jaxb.tsl.OtherTSLPointerType;
import eu.europa.esig.trustedlist.jaxb.tsl.TrustStatusListType;
import eu.europa.esig.xmldsig.jaxb.X509DataType;
import jakarta.xml.bind.JAXBContext;
import jakarta.xml.bind.JAXBElement;
import jakarta.xml.bind.JAXBException;
import jakarta.xml.bind.Marshaller;
import jakarta.xml.bind.Unmarshaller;
import java.security.cert.X509Certificate;
import java.util.List;
import java.util.Optional;
import java.util.function.Predicate;
import javax.xml.XMLConstants;
import javax.xml.namespace.QName;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.TransformerFactory;
import lombok.AccessLevel;
import lombok.NoArgsConstructor;
import lombok.NonNull;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
@NoArgsConstructor(access = AccessLevel.PRIVATE)
public final class TslUtils {
public static Predicate<OtherTSLPointerType> tslDownloadUrlMatchesOid(@NonNull final String oid) {
return p ->
((MultiLangStringType)
Optional.of(p.getAdditionalInformation())
.orElseThrow()
.getTextualInformationOrOtherInformation()
.stream()
.findFirst()
.orElseThrow())
.getValue()
.equals(oid);
}
static DocumentBuilder createDocBuilder() throws ParserConfigurationException {
final DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
dbf.setAttribute(XMLConstants.ACCESS_EXTERNAL_DTD, "");
dbf.setAttribute(XMLConstants.ACCESS_EXTERNAL_SCHEMA, "");
dbf.setNamespaceAware(true); // very important
return dbf.newDocumentBuilder();
}
static TransformerFactory getTransformerFactory() {
final TransformerFactory tf = TransformerFactory.newInstance();
tf.setAttribute(XMLConstants.ACCESS_EXTERNAL_DTD, "");
tf.setAttribute(XMLConstants.ACCESS_EXTERNAL_STYLESHEET, "");
return tf;
}
static Unmarshaller createUnmarshaller() throws JAXBException {
final JAXBContext jaxbContext = JAXBContext.newInstance(TrustStatusListType.class);
return jaxbContext.createUnmarshaller();
}
static Marshaller createMarshaller() throws JAXBException {
final JAXBContext jaxbContext = JAXBContext.newInstance(TrustStatusListType.class);
return jaxbContext.createMarshaller();
}
static JAXBElement<TrustStatusListType> createJaxbElement(
@NonNull final TrustStatusListType tslUnsigned) {
return new JAXBElement<>(
new QName("http://uri.etsi.org/02231/v2#", "TrustServiceStatusList"),
TrustStatusListType.class,
tslUnsigned);
}
/**
* @param tsl TSL to get signature from
* @return signature element of TSL
*/
public static Element getSignature(@NonNull final Document tsl) {
return (Element) tsl.getElementsByTagNameNS(XMLNS, "Signature").item(0);
}
public static X509Certificate getFirstTslSignerCertificate(final TrustStatusListType tsl) {
final JAXBElement<byte[]> signatureCertificateJaxbElem =
getFirstSignatureCertificateJaxbElement(tsl);
return CertReader.readX509(signatureCertificateJaxbElem.getValue());
}
public static JAXBElement<byte[]> getFirstSignatureCertificateJaxbElement(
final TrustStatusListType tsl) {
return tsl.getSignature().getKeyInfo().getContent().stream()
.filter(JAXBElement.class::isInstance)
.map(JAXBElement.class::cast)
.map(JAXBElement::getValue)
.filter(X509DataType.class::isInstance)
.map(X509DataType.class::cast)
.map(X509DataType::getX509IssuerSerialOrX509SKIOrX509SubjectName)
.flatMap(List::stream)
.filter(JAXBElement.class::isInstance)
.map(
obj -> {
@SuppressWarnings("unchecked")
final JAXBElement<byte[]> jaxElem = (JAXBElement<byte[]>) obj;
return jaxElem;
})
.findFirst()
.orElseThrow(() -> new GemPkiRuntimeException("tsl without a signer certificate element"));
}
}