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The Bouncy Castle Crypto package is a Java implementation of cryptographic algorithms. This jar contains JCE provider and lightweight API for the Bouncy Castle Cryptography APIs for Java 1.8 and later with debug enabled.

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package org.bouncycastle.asn1;

import java.io.IOException;

/**
 * Parser for definite-length tagged objects.
 */
class DLTaggedObjectParser
    extends BERTaggedObjectParser
{
    private final boolean _constructed;

    DLTaggedObjectParser(int tagClass, int tagNo, boolean constructed, ASN1StreamParser parser)
    {
        super(tagClass, tagNo, parser);

        _constructed = constructed;
    }

    /**
     * Return true if this tagged object is marked as constructed.
     *
     * @return true if constructed, false otherwise.
     */
    public boolean isConstructed()
    {
        return _constructed;
    }

    /**
     * Return an in-memory, encodable, representation of the tagged object.
     *
     * @return an ASN1TaggedObject.
     * @throws IOException if there is an issue loading the data.
     */
    public ASN1Primitive getLoadedObject()
        throws IOException
    {
        return _parser.loadTaggedDL(_tagClass, _tagNo, _constructed);
    }

    public ASN1Encodable parseBaseUniversal(boolean declaredExplicit, int baseTagNo) throws IOException
    {
        if (declaredExplicit)
        {
            if (!_constructed)
            {
                throw new IOException("Explicit tags must be constructed (see X.690 8.14.2)");
            }

            return _parser.parseObject(baseTagNo);
        }

        return _constructed
            ?  _parser.parseImplicitConstructedDL(baseTagNo)
            :  _parser.parseImplicitPrimitive(baseTagNo);
    }

    public ASN1Encodable parseExplicitBaseObject() throws IOException
    {
        if (!_constructed)
        {
            throw new IOException("Explicit tags must be constructed (see X.690 8.14.2)");
        }

        return _parser.readObject();
    }

    public ASN1TaggedObjectParser parseExplicitBaseTagged() throws IOException
    {
        if (!_constructed)
        {
            throw new IOException("Explicit tags must be constructed (see X.690 8.14.2)");
        }

        return _parser.parseTaggedObject();
    }

    public ASN1TaggedObjectParser parseImplicitBaseTagged(int baseTagClass, int baseTagNo) throws IOException
    {
        // TODO[asn1] Special handling can be removed once ASN1ApplicationSpecific types removed.
        if (BERTags.APPLICATION == baseTagClass)
        {
            // This cast is ensuring the current user-expected return type.
            return (DLApplicationSpecific)_parser.loadTaggedDL(baseTagClass, baseTagNo, _constructed);
        }

        return new DLTaggedObjectParser(baseTagClass, baseTagNo, _constructed, _parser);
    }
}