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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 JDK 1.4.

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package org.bouncycastle.asn1.cms;

import org.bouncycastle.asn1.ASN1Choice;
import org.bouncycastle.asn1.ASN1Encodable;
import org.bouncycastle.asn1.ASN1Object;
import org.bouncycastle.asn1.ASN1OctetString;
import org.bouncycastle.asn1.ASN1Primitive;
import org.bouncycastle.asn1.ASN1Sequence;
import org.bouncycastle.asn1.ASN1TaggedObject;
import org.bouncycastle.asn1.DERTaggedObject;
import org.bouncycastle.asn1.x509.SubjectKeyIdentifier;

/**
 * RFC 5652:
 * Content encryption key delivery mechanisms.
 *  
 * OriginatorIdentifierOrKey ::= CHOICE {
 *     issuerAndSerialNumber IssuerAndSerialNumber,
 *     subjectKeyIdentifier [0] SubjectKeyIdentifier,
 *     originatorKey [1] OriginatorPublicKey 
 * }
 *
 * SubjectKeyIdentifier ::= OCTET STRING
 *


 */
public class OriginatorIdentifierOrKey
    extends ASN1Object
    implements ASN1Choice
{
    private ASN1Encodable id;

    public OriginatorIdentifierOrKey(
        IssuerAndSerialNumber id)
    {
        this.id = id;
    }

    /**
     * @deprecated use version taking a SubjectKeyIdentifier
     */
    public OriginatorIdentifierOrKey(
        ASN1OctetString id)
    {
        this(new SubjectKeyIdentifier(id.getOctets()));
    }

    public OriginatorIdentifierOrKey(
        SubjectKeyIdentifier id)
    {
        this.id = new DERTaggedObject(false, 0, id);
    }

    public OriginatorIdentifierOrKey(
        OriginatorPublicKey id)
    {
        this.id = new DERTaggedObject(false, 1, id);
    }

    /**
     * @deprecated use more specific version
     */
    public OriginatorIdentifierOrKey(
        ASN1Primitive id)
    {
        this.id = id;
    }

    /**
     * Return an OriginatorIdentifierOrKey object from a tagged object.
     *
     * @param o the tagged object holding the object we want.
     * @param explicit true if the object is meant to be explicitly
     *              tagged false otherwise.
     * @exception IllegalArgumentException if the object held by the
     *          tagged object cannot be converted.
     */
    public static OriginatorIdentifierOrKey getInstance(
        ASN1TaggedObject    o,
        boolean             explicit)
    {
        if (!explicit)
        {
            throw new IllegalArgumentException(
                    "Can't implicitly tag OriginatorIdentifierOrKey");
        }

        return getInstance(o.getObject());
    }
    
    /**
     * Return an OriginatorIdentifierOrKey object from the given object.
     *

* Accepted inputs: * * null → null * {@link OriginatorIdentifierOrKey} object * {@link IssuerAndSerialNumber} object * {@link org.bouncycastle.asn1.ASN1TaggedObject#getInstance(java.lang.Object) ASN1TaggedObject} input formats with IssuerAndSerialNumber structure inside * * * @param o the object we want converted. * @exception IllegalArgumentException if the object cannot be converted. */ public static OriginatorIdentifierOrKey getInstance( Object o) { if (o == null || o instanceof OriginatorIdentifierOrKey) { return (OriginatorIdentifierOrKey)o; } if (o instanceof IssuerAndSerialNumber || o instanceof ASN1Sequence) { return new OriginatorIdentifierOrKey(IssuerAndSerialNumber.getInstance(o)); } if (o instanceof ASN1TaggedObject) { ASN1TaggedObject tagged = (ASN1TaggedObject)o; if (tagged.getTagNo() == 0) { return new OriginatorIdentifierOrKey(SubjectKeyIdentifier.getInstance(tagged, false)); } else if (tagged.getTagNo() == 1) { return new OriginatorIdentifierOrKey(OriginatorPublicKey.getInstance(tagged, false)); } } throw new IllegalArgumentException("Invalid OriginatorIdentifierOrKey: " + o.getClass().getName()); } public ASN1Encodable getId() { return id; } public IssuerAndSerialNumber getIssuerAndSerialNumber() { if (id instanceof IssuerAndSerialNumber) { return (IssuerAndSerialNumber)id; } return null; } public SubjectKeyIdentifier getSubjectKeyIdentifier() { if (id instanceof ASN1TaggedObject && ((ASN1TaggedObject)id).getTagNo() == 0) { return SubjectKeyIdentifier.getInstance((ASN1TaggedObject)id, false); } return null; } public OriginatorPublicKey getOriginatorKey() { if (id instanceof ASN1TaggedObject && ((ASN1TaggedObject)id).getTagNo() == 1) { return OriginatorPublicKey.getInstance((ASN1TaggedObject)id, false); } return null; } /** * Produce an object suitable for an ASN1OutputStream. */ public ASN1Primitive toASN1Primitive() { return id.toASN1Primitive(); } }