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

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Here is the source code for org.cryptoworkshop.ximix.common.asn1.message.ClientMessage.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.ASN1Enumerated;
import org.bouncycastle.asn1.ASN1Primitive;
import org.bouncycastle.asn1.ASN1Sequence;
import org.bouncycastle.asn1.DERSequence;

/**
 * General carrier for service request messages related to a non-privileged client.
 */
public class ClientMessage extends Message<ClientMessage.Type> {
    public static enum Type implements MessageType {
        UPLOAD_TO_BOARD, FETCH_PUBLIC_KEY, CREATE_SIGNATURE
    }

    /**
     * Base constructor.
     *
     * @param type the service type the message relates to.
     * @param payload the encapsulated message data.
     */
    public ClientMessage(Type type, ASN1Encodable payload) {
        super(type, payload);
    }

    private ClientMessage(ASN1Sequence seq) {
        super(Type.values()[ASN1Enumerated.getInstance(seq.getObjectAt(1)).getValue().intValue()],
                seq.getObjectAt(2));
    }

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

            if (!seq.getObjectAt(0).equals(CLIENT_LEVEL)) {
                throw new IllegalArgumentException("malformed client message");
            }

            return new ClientMessage(seq);
        }

        return null;
    }

    public Type getType() {
        return type;
    }

    public ASN1Encodable getPayload() {
        return payload;
    }

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

        v.add(CLIENT_LEVEL);
        v.add(new ASN1Enumerated(type.ordinal()));
        v.add(payload);

        return new DERSequence(v);
    }
}