// pvno [0] INTEGER 5
        v.add(new DERTaggedObject(true, 0, new ASN1Integer(Integer.parseInt(KerberosConstants.KERBEROS_VERSION))));
        // msg-type [1] INTEGER 14 (AP-REQ)
        v.add(new DERTaggedObject(true, 1, new ASN1Integer(Integer.parseInt(KerberosConstants.KERBEROS_AP_REQ))));
        // ap-options [2] BIT STRING

        ASN1Sequence apReqSequence = new DERSequence(new ASN1Encodable[] { new DERTaggedObject(true, 0, new ASN1Integer(5)), // pvno
                new DERTaggedObject(true, 1, new ASN1Integer(14)), // msg-type
        });

        // Create CONTEXT tagged object instead of APPLICATION
        DERTaggedObject contextTag = new DERTaggedObject(false, 14, apReqSequence);

        // Build inner content with OID and magic bytes

            ev.add(new DERTaggedObject(true, 0, new DERSequence(fields)));
            final ByteArrayOutputStream collector = new ByteArrayOutputStream();
            final ASN1OutputStream der = ASN1OutputStream.create(collector, ASN1Encoding.DER);
            final DERTaggedObject derApplicationSpecific = new DERTaggedObject(false, BERTags.APPLICATION, 0, new DERSequence(ev));
            der.writeObject(derApplicationSpecific);

                v.add(m);
            }
            fields.add(new DERTaggedObject(true, 0, new DERSequence(v)));
        }
        if (flags != null && flags != 0) {
            fields.add(new DERTaggedObject(true, 1, new DERBitString(flags)));
        }
        if (mechToken != null) {
            fields.add(new DERTaggedObject(true, 2, new DEROctetString(mechToken)));
        }
        if (mic != null) {

        elementVector1.add(new DERTaggedObject(0, new ASN1Integer(1)));
        elementVector1.add(new DERTaggedObject(1, new DEROctetString(new byte[] { 0x01 })));
        authVector.add(new DERSequence(elementVector1));

        ASN1EncodableVector elementVector2 = new ASN1EncodableVector();
        elementVector2.add(new DERTaggedObject(0, new ASN1Integer(2)));

                fields.add(new DERTaggedObject(true, 2, new DEROctetString(mechanismToken)));
            }
            final byte[] mechanismListMIC = getMechanismListMIC();
            if (mechanismListMIC != null) {
                fields.add(new DERTaggedObject(true, 3, new DEROctetString(mechanismListMIC)));
            }
            der.writeObject(new DERTaggedObject(true, 1, new DERSequence(fields)));

import org.bouncycastle.asn1.ASN1Integer;
import org.bouncycastle.asn1.ASN1Sequence;
import org.bouncycastle.asn1.ASN1TaggedObject;
import org.bouncycastle.asn1.DERSequence;
import org.bouncycastle.asn1.DERTaggedObject;
import org.bouncycastle.asn1.DLSequence;
import org.junit.jupiter.api.Test;

/**
 * Tests for the {@link ASN1Util} class.
 */
class ASN1UtilTest {

    // --- as(Class, Object) ---

    @Test