How to use

getAsn1SequenceFromDerOctetString

method

in

eu.europa.ec.markt.dss.DSSASN1Utils

public static List<String> getPolicyIdentifiers(final X509Certificate cert) {
  final byte[] certificatePolicies = cert.getExtensionValue(X509Extension.certificatePolicies.getId());
  if (certificatePolicies == null) {
    return Collections.emptyList();
  }
  ASN1Sequence seq = DSSASN1Utils.getAsn1SequenceFromDerOctetString(certificatePolicies);
  final List<String> policyIdentifiers = new ArrayList<String>();
  for (int ii = 0; ii < seq.size(); ii++) {
    final PolicyInformation policyInfo = PolicyInformation.getInstance(seq.getObjectAt(ii));
    // System.out.println("\t----> PolicyIdentifier: " + policyInfo.getPolicyIdentifier().getId());
    policyIdentifiers.add(policyInfo.getPolicyIdentifier().getId());
  }
  return policyIdentifiers;
}

/**
 * @param x509Certificate
 * @return
 */
public static List<String> getQCStatementsIdList(final X509Certificate x509Certificate) {
  final List<String> extensionIdList = new ArrayList<String>();
  final byte[] qcStatement = x509Certificate.getExtensionValue(Extension.qCStatements.getId());
  if (qcStatement != null) {
    final ASN1Sequence seq = DSSASN1Utils.getAsn1SequenceFromDerOctetString(qcStatement);
    // Sequence of QCStatement
    for (int ii = 0; ii < seq.size(); ii++) {
      final QCStatement statement = QCStatement.getInstance(seq.getObjectAt(ii));
      extensionIdList.add(statement.getStatementId().getId());
    }
  }
  return extensionIdList;
}

final ASN1Sequence asn1Sequence = DSSASN1Utils.getAsn1SequenceFromDerOctetString(authInfoAccessExtensionValue);
final AuthorityInformationAccess authorityInformationAccess = AuthorityInformationAccess.getInstance(asn1Sequence);
final AccessDescription[] accessDescriptions = authorityInformationAccess.getAccessDescriptions();

final ASN1Sequence asn1Sequence = DSSASN1Utils.getAsn1SequenceFromDerOctetString(crlDistributionPointsBytes);
final CRLDistPoint distPoint = CRLDistPoint.getInstance(asn1Sequence);
final DistributionPoint[] distributionPoints = distPoint.getDistributionPoints();

  asn1Sequence = DSSASN1Utils.getAsn1SequenceFromDerOctetString(authInfoAccessExtensionValue);
} catch (DSSException e) {
  return null;