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The Bouncy Castle Java APIs for ASN.1 extension and utility APIs used to support bcpkix and bctls with the BC FIPS provider. The APIs may also be used with other providers although if being used in a FIPS context it is the responsibility of the user to ensure that any other providers used are FIPS certified and used appropriately.

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/***************************************************************/
/******    DO NOT EDIT THIS CLASS bc-java SOURCE FILE     ******/
/***************************************************************/
package org.bouncycastle.asn1.crmf;

import org.bouncycastle.asn1.ASN1Choice;
import org.bouncycastle.asn1.ASN1Encodable;
import org.bouncycastle.asn1.ASN1Object;
import org.bouncycastle.asn1.ASN1Primitive;
import org.bouncycastle.asn1.ASN1TaggedObject;
import org.bouncycastle.asn1.DERNull;
import org.bouncycastle.asn1.DERTaggedObject;

public class ProofOfPossession
    extends ASN1Object
    implements ASN1Choice
{
    public static final int TYPE_RA_VERIFIED = 0;
    public static final int TYPE_SIGNING_KEY = 1;
    public static final int TYPE_KEY_ENCIPHERMENT = 2;
    public static final int TYPE_KEY_AGREEMENT = 3;

    private int tagNo;
    private ASN1Encodable obj;

    private ProofOfPossession(ASN1TaggedObject tagged)
    {
        tagNo = tagged.getTagNo();
        switch (tagNo)
        {
        case 0:
            obj = DERNull.INSTANCE;
            break;
        case 1:
            obj = POPOSigningKey.getInstance(tagged, false);
            break;
        case 2:
        case 3:
            obj = POPOPrivKey.getInstance(tagged, true);
            break;
        default:
            throw new IllegalArgumentException("unknown tag: " + tagNo);
        }
    }

    public static ProofOfPossession getInstance(Object o)
    {
        if (o == null || o instanceof ProofOfPossession)
        {
            return (ProofOfPossession)o;
        }

        if (o instanceof ASN1TaggedObject)
        {
            return new ProofOfPossession((ASN1TaggedObject)o);
        }

        throw new IllegalArgumentException("Invalid object: " + o.getClass().getName());
    }

    /** Creates a ProofOfPossession with type raVerified. */
    public ProofOfPossession()
    {
        tagNo = TYPE_RA_VERIFIED;
        obj = DERNull.INSTANCE;
    }

    /** Creates a ProofOfPossession for a signing key. */
    public ProofOfPossession(POPOSigningKey poposk)
    {
        tagNo = TYPE_SIGNING_KEY;
        obj = poposk;
    }

    /**
     * Creates a ProofOfPossession for key encipherment or agreement.
     * @param type one of TYPE_KEY_ENCIPHERMENT or TYPE_KEY_AGREEMENT
     */
    public ProofOfPossession(int type, POPOPrivKey privkey)
    {
        tagNo = type;
        obj = privkey;
    }

    public int getType()
    {
        return tagNo;
    }

    public ASN1Encodable getObject()
    {
        return obj;
    }

    /**
     *      * ProofOfPossession ::= CHOICE {
     *                           raVerified        [0] NULL,
     *                           -- used if the RA has already verified that the requester is in
     *                           -- possession of the private key
     *                           signature         [1] POPOSigningKey,
     *                           keyEncipherment   [2] POPOPrivKey,
     *                           keyAgreement      [3] POPOPrivKey }
     * 
     * @return a basic ASN.1 object representation.
     */
    public ASN1Primitive toASN1Primitive()
    {
        return new DERTaggedObject(false, tagNo, obj);
    }
}