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

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Here is the source code for org.cryptoworkshop.ximix.common.asn1.message.PermuteAndMoveMessage.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 java.math.BigInteger;

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;
import org.bouncycastle.asn1.DERUTF8String;

/**
 * Request message for a shuffle and move operation on a bulletin board.
 */
public class PermuteAndMoveMessage extends ASN1Object {
    private final long operationNumber;
    private final String boardName;
    private final int stepNumber;
    private final String keyID;
    private final String nodeName;
    private final String transformName;

    /**
     * Base constructor.
     *
     * @param operationNumber the operation number this request is associated with.
     * @param boardName the name of the board this operation is associated with.
     * @param stepNumber the step number in the operation this message is associated with.
     * @param transformName the transform to be applied to the message prior to moving.
     * @param keyID the ID of the public key the transformation involves.
     * @param nodeName the name of the node to send the shuffled messages to.
     */
    public PermuteAndMoveMessage(long operationNumber, String boardName, int stepNumber, String transformName,
            String keyID, String nodeName) {
        this.operationNumber = operationNumber;
        this.boardName = boardName;
        this.stepNumber = stepNumber;
        this.transformName = transformName;
        this.keyID = keyID;
        this.nodeName = nodeName;
    }

    private PermuteAndMoveMessage(ASN1Sequence seq) {
        this.operationNumber = ASN1Integer.getInstance(seq.getObjectAt(0)).getValue().longValue();
        this.boardName = DERUTF8String.getInstance(seq.getObjectAt(1)).getString();
        this.stepNumber = ASN1Integer.getInstance(seq.getObjectAt(2)).getValue().intValue();
        this.transformName = DERUTF8String.getInstance(seq.getObjectAt(3)).getString();

        if (seq.size() == 6) {
            this.keyID = DERUTF8String.getInstance(seq.getObjectAt(4)).getString();
            this.nodeName = DERUTF8String.getInstance(seq.getObjectAt(5)).getString();
        } else {
            this.keyID = null;
            this.nodeName = DERUTF8String.getInstance(seq.getObjectAt(4)).getString();
        }
    }

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

        return null;
    }

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

        v.add(new ASN1Integer(BigInteger.valueOf(operationNumber)));
        v.add(new DERUTF8String(boardName));
        v.add(new ASN1Integer(BigInteger.valueOf(stepNumber)));
        v.add(new DERUTF8String(transformName));

        if (keyID != null) {
            v.add(new DERUTF8String(keyID));
        }

        v.add(new DERUTF8String(nodeName));

        return new DERSequence(v);
    }

    public String getKeyID() {
        return keyID;
    }

    public String getBoardName() {
        return boardName;
    }

    public long getOperationNumber() {
        return operationNumber;
    }

    public int getStepNumber() {
        return stepNumber;
    }

    public String getTransformName() {
        return transformName;
    }

    public String getDestinationNode() {
        return nodeName;
    }
}