ch.threema.apitool.messages.ImageMessage.java Source code

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Here is the source code for ch.threema.apitool.messages.ImageMessage.java

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/*
 * $Id$
 *
 * The MIT License (MIT)
 * Copyright (c) 2015 Threema GmbH
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE
 */

package ch.threema.apitool.messages;

import ch.threema.apitool.DataUtils;
import com.neilalexander.jnacl.NaCl;
import org.apache.commons.io.EndianUtils;

/**
 * An image message that can be sent/received with end-to-end encryption via Threema.
 */
public class ImageMessage extends ThreemaMessage {

    public static final int TYPE_CODE = 0x02;
    private final byte[] blobId;
    private final int size;
    private final byte[] nonce;

    public ImageMessage(byte[] blobId, int size, byte[] nonce) {

        this.blobId = blobId;
        this.size = size;
        this.nonce = nonce;
    }

    public byte[] getBlobId() {
        return this.blobId;
    }

    public int getSize() {
        return this.size;
    }

    public byte[] getNonce() {
        return this.nonce;
    }

    @Override
    public int getTypeCode() {
        return TYPE_CODE;
    }

    @Override
    public String toString() {
        return "blob " + DataUtils.byteArrayToHexString(this.blobId);
    }

    @Override
    public byte[] getData() {
        byte[] data = new byte[BLOB_ID_LEN + 4 + NaCl.NONCEBYTES];
        int pos = 0;
        System.arraycopy(this.blobId, 0, data, pos, BLOB_ID_LEN);
        pos += BLOB_ID_LEN;

        EndianUtils.writeSwappedInteger(data, pos, this.size);
        pos += 4;

        System.arraycopy(this.nonce, 0, data, pos, NaCl.NONCEBYTES);
        return data;

    }
}