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

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Here is the source code for org.cryptoworkshop.ximix.common.asn1.message.CapabilityMessage.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.ASN1Object;
import org.bouncycastle.asn1.ASN1Primitive;
import org.bouncycastle.asn1.ASN1Sequence;
import org.bouncycastle.asn1.ASN1Set;
import org.bouncycastle.asn1.DERSequence;
import org.bouncycastle.asn1.DERSet;

/**
 * Carrier message for service capabilities.
 */
public class CapabilityMessage extends ASN1Object {
    public static enum Type implements MessageType {
        BOARD_HOSTING, DECRYPTION, SHUFFLE_DECRYPTION, ENCRYPTION, KEY_RETRIEVAL, KEY_GENERATION, SIGNING, NODE_INFO, NODE_HEALTH, EXTERNAL
    }

    private final Type type;
    private final ASN1Encodable[] details;

    /**
     * Base constructor.
     *
     * @param type the capability type this message represents.
     * @param details any details associated with the capability type.
     */
    public CapabilityMessage(Type type, ASN1Encodable[] details) {
        this.type = type;
        this.details = details;
    }

    private CapabilityMessage(ASN1Sequence s) {
        this.type = Type.values()[ASN1Enumerated.getInstance(s.getObjectAt(0)).getValue().intValue()];
        this.details = convertSet(ASN1Set.getInstance(s.getObjectAt(1)));
    }

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

        v.add(new ASN1Enumerated(type.ordinal()));
        v.add(new DERSet(details));

        return new DERSequence(v);
    }

    private ASN1Encodable[] convertSet(ASN1Set strings) {
        ASN1Encodable[] rv = new ASN1Encodable[strings.size()];

        for (int i = 0; i != rv.length; i++) {
            rv[i] = strings.getObjectAt(i);
        }

        return rv;
    }

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

        return null;
    }

    public Type getType() {
        return type;
    }

    public ASN1Encodable[] getDetails() {
        return details.clone();
    }
}