static IssuerInformation issuerInformationFromPreCertificateSigningCert(
Certificate certificate, byte[] keyHash) {
try (ASN1InputStream aIssuerIn = new ASN1InputStream(certificate.getEncoded())) {
org.bouncycastle.asn1.x509.Certificate parsedIssuerCert =
org.bouncycastle.asn1.x509.Certificate.getInstance(aIssuerIn.readObject());
Extensions issuerExtensions = parsedIssuerCert.getTBSCertificate().getExtensions();
Extension x509authorityKeyIdentifier = null;
if (issuerExtensions != null) {
x509authorityKeyIdentifier =