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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.cmp;

import org.bouncycastle.asn1.ASN1Encodable;
import org.bouncycastle.asn1.ASN1EncodableVector;
import org.bouncycastle.asn1.ASN1Object;
import org.bouncycastle.asn1.ASN1OctetString;
import org.bouncycastle.asn1.ASN1Primitive;
import org.bouncycastle.asn1.ASN1Sequence;
import org.bouncycastle.asn1.DEROctetString;
import org.bouncycastle.asn1.DERSequence;
import org.bouncycastle.asn1.x509.AlgorithmIdentifier;

public class Challenge
    extends ASN1Object
{
    private AlgorithmIdentifier owf;
    private ASN1OctetString witness;
    private ASN1OctetString challenge;

    private Challenge(ASN1Sequence seq)
    {
        int index = 0;

        if (seq.size() == 3)
        {
            owf = AlgorithmIdentifier.getInstance(seq.getObjectAt(index++));
        }

        witness = ASN1OctetString.getInstance(seq.getObjectAt(index++));
        challenge = ASN1OctetString.getInstance(seq.getObjectAt(index));
    }

    public static Challenge getInstance(Object o)
    {
        if (o instanceof Challenge)
        {
            return (Challenge)o;
        }

        if (o != null)
        {
            return new Challenge(ASN1Sequence.getInstance(o));
        }

        return null;
    }

    public Challenge(byte[] witness, byte[] challenge)
    {
        this(null, witness, challenge);
    }

    public Challenge(AlgorithmIdentifier owf, byte[] witness, byte[] challenge)
    {
        this.owf = owf;
        this.witness = new DEROctetString(witness);
        this.challenge = new DEROctetString(challenge);
    }

    public AlgorithmIdentifier getOwf()
    {
        return owf;
    }

    public byte[] getWitness()
    {
        return witness.getOctets();
    }

    public byte[] getChallenge()
    {
        return challenge.getOctets();
    }

    /**
     *      * Challenge ::= SEQUENCE {
     *                 owf                 AlgorithmIdentifier  OPTIONAL,
     *
     *                 -- MUST be present in the first Challenge; MAY be omitted in
     *                 -- any subsequent Challenge in POPODecKeyChallContent (if
     *                 -- omitted, then the owf used in the immediately preceding
     *                 -- Challenge is to be used).
     *
     *                 witness             OCTET STRING,
     *                 -- the result of applying the one-way function (owf) to a
     *                 -- randomly-generated INTEGER, A.  [Note that a different
     *                 -- INTEGER MUST be used for each Challenge.]
     *                 challenge           OCTET STRING
     *                 -- the encryption (under the public key for which the cert.
     *                 -- request is being made) of Rand, where Rand is specified as
     *                 --   Rand ::= SEQUENCE {
     *                 --      int      INTEGER,
     *                 --       - the randomly-generated INTEGER A (above)
     *                 --      sender   GeneralName
     *                 --       - the sender's name (as included in PKIHeader)
     *                 --   }
     *      }
     * 
     * @return a basic ASN.1 object representation.
     */
    public ASN1Primitive toASN1Primitive()
    {
        ASN1EncodableVector v = new ASN1EncodableVector();

        addOptional(v, owf);
        v.add(witness);
        v.add(challenge);

        return new DERSequence(v);
    }

    private void addOptional(ASN1EncodableVector v, ASN1Encodable obj)
    {
        if (obj != null)
        {
            v.add(obj);
        }
    }
}