org.cryptoworkshop.ximix.common.asn1.message.ShareMessage.java Source code

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Here is the source code for org.cryptoworkshop.ximix.common.asn1.message.ShareMessage.java

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/**
 * Copyright 2013 Crypto Workshop Pty Ltd
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.cryptoworkshop.ximix.common.asn1.message;

import org.bouncycastle.asn1.ASN1Encodable;
import org.bouncycastle.asn1.ASN1EncodableVector;
import org.bouncycastle.asn1.ASN1Integer;
import org.bouncycastle.asn1.ASN1Object;
import org.bouncycastle.asn1.ASN1Primitive;
import org.bouncycastle.asn1.ASN1Sequence;
import org.bouncycastle.asn1.DERSequence;

/**
 * Carrier class for a share in a threshold operation.
 */
public class ShareMessage extends ASN1Object {
    private final ASN1Encodable shareData;
    private final int sequenceNo;

    /**
     * Base constructor.
     *
     * @param sequenceNo the share's sequence number in the threshold operation.
     * @param shareData the data representing the share's value.
     */
    public ShareMessage(int sequenceNo, ASN1Encodable shareData) {
        this.sequenceNo = sequenceNo;
        this.shareData = shareData;
    }

    private ShareMessage(ASN1Sequence seq) {
        this.sequenceNo = ASN1Integer.getInstance(seq.getObjectAt(0)).getValue().intValue();
        this.shareData = seq.getObjectAt(1);
    }

    public static final ShareMessage getInstance(Object o) {
        if (o instanceof ShareMessage) {
            return (ShareMessage) o;
        } else if (o != null) {
            return new ShareMessage(ASN1Sequence.getInstance(o));
        }

        return null;
    }

    @Override
    public ASN1Primitive toASN1Primitive() {
        ASN1EncodableVector v = new ASN1EncodableVector();

        v.add(new ASN1Integer(sequenceNo));
        v.add(shareData);

        return new DERSequence(v);
    }

    public int getSequenceNo() {
        return sequenceNo;
    }

    public ASN1Encodable getShareData() {
        return shareData;
    }
}