Java tutorial
/** * 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.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.DERUTF8String; /** * Carrier message containing the commitment value for a seed for a particular board operation. */ public class SeedCommitmentMessage extends ASN1Object { private final String boardName; private final long operationNumber; private final byte[] commitment; /** * Base constructor. * * @param boardName the name of the board the commitment is associated with. * @param operationNumber the operation number the commitment is associated with. * @param commitment the seed commitment. */ public SeedCommitmentMessage(String boardName, long operationNumber, byte[] commitment) { this.boardName = boardName; this.operationNumber = operationNumber; this.commitment = commitment; } private SeedCommitmentMessage(ASN1Sequence sequence) { this.boardName = DERUTF8String.getInstance(sequence.getObjectAt(0)).getString(); this.operationNumber = ASN1Integer.getInstance(sequence.getObjectAt(1)).getValue().longValue(); this.commitment = ASN1OctetString.getInstance(sequence.getObjectAt(2)).getOctets(); } public static final SeedCommitmentMessage getInstance(Object o) { if (o instanceof SeedCommitmentMessage) { return (SeedCommitmentMessage) o; } else if (o != null) { return new SeedCommitmentMessage(ASN1Sequence.getInstance(o)); } return null; } @Override public ASN1Primitive toASN1Primitive() { ASN1EncodableVector v = new ASN1EncodableVector(); v.add(new DERUTF8String(boardName)); v.add(new ASN1Integer(operationNumber)); v.add(new DEROctetString(commitment)); return new DERSequence(v); } public String getBoardName() { return boardName; } public long getOperationNumber() { return operationNumber; } public byte[] getCommitment() { return commitment; } }