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

Introduction

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

Source

/**
 * 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.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 message for which MessageCommitment matches which index.
 */
public class MessageWitness extends ASN1Object {
    private final int index;
    private final MessageCommitment witness;

    private MessageWitness(ASN1Sequence seq) {
        this.index = ASN1Integer.getInstance(seq.getObjectAt(0)).getValue().intValue();
        this.witness = MessageCommitment.getInstance(seq.getObjectAt(1));
    }

    /**
     * Base constructor.
     *
     * @param index the index of the message prior to shuffling.
     * @param witness the full details of the commitment's witness.
     */
    public MessageWitness(int index, MessageCommitment witness) {
        this.index = index;
        this.witness = witness;
    }

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

        return null;
    }

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

        v.add(new ASN1Integer(index));
        v.add(witness);

        return new DERSequence(v);
    }

    public int getIndex() {
        return index;
    }

    public MessageCommitment getWitness() {
        return witness;
    }
}