Example usage for java.nio ByteBuffer getLong

Introduction

In this page you can find the example usage for java.nio ByteBuffer getLong.

Prototype

public abstract long getLong(int index);

Source Link

Document

Returns the long at the specified index.

Usage

From source file:Main.java

public static void main(String[] args) {
    ByteBuffer bb = ByteBuffer.allocate(BSIZE);
    bb.asLongBuffer().put(99472342341142L);
    System.out.println(bb.getLong(0));

}

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From source file:com.openteach.diamond.network.waverider.session.DefaultSession.java

public static void main(String[] args) {

    BlockingQueue<ByteBuffer> inputBuffer = new LinkedBlockingQueue<ByteBuffer>();
    /*for (int i = 0; i < 10; i++)
    {*//*from   w w w  .  ja  va  2  s .  c  om*/
    ByteBuffer byteBuffer = ByteBuffer.allocate(1024);
    byteBuffer.put(makePacket().marshall());
    byteBuffer.put(makePacket().marshall());
    byteBuffer.flip();
    byte[] b = new byte[8];
    ByteBuffer halfBuf0 = ByteBuffer.allocate(8);
    byteBuffer.get(b);
    halfBuf0.put(b);
    halfBuf0.flip();
    inputBuffer.add(halfBuf0);
    inputBuffer.add(byteBuffer);
    /*}*/

    int size = 0;
    int oldSize = size;
    long length = Packet.getHeaderSize();
    ByteBuffer buffer = ByteBuffer.allocate(NetWorkConstants.DEFAULT_NETWORK_BUFFER_SIZE);
    ByteBuffer currentBuffer = null;

    while (size < length) {
        currentBuffer = inputBuffer.peek();
        oldSize = size;
        int position = currentBuffer.position();
        size += currentBuffer.remaining();
        buffer.put(currentBuffer);
        if (size >= Packet.getHeaderSize()) {
            length = buffer.getLong(Packet.getLengthPosition());
        }

        if (size <= length) {
            inputBuffer.remove();
        } else {
            currentBuffer.position(position);
            buffer.position(buffer.position() - currentBuffer.remaining());
            byte[] buf = new byte[(int) (length - oldSize)];
            currentBuffer.get(buf);
            buffer.put(buf);
        }
    }

    // buffer.position(0);
    buffer.flip();
    Packet packet = Packet.unmarshall(buffer);

    Command command = CommandFactory.createCommand(packet.getType(), packet.getPayLoad());

    String str = new String(command.getPayLoad().array());

    System.out.println(str);

}

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From source file:org.i3xx.step.mongo.core.util.IdGen.java

/**
 * Gets a 128 bit IdRep from an URL save representation
 * /*from  ww w  .  j  a  v  a  2 s .co  m*/
 * @param urlSave
 * @return The IdRep object
 */
public static final IdRep fromURLSaveString(String urlSave) {

    byte[] bytes = Base64.decodeBase64(urlSave);
    ByteBuffer buffer = ByteBuffer.wrap(bytes);
    UUID uuid = new UUID(buffer.getLong(0), buffer.getLong(8));

    return new JavaIdRep(uuid);
}

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From source file:org.slc.sli.common.util.uuid.DeterministicUUIDGeneratorStrategy.java

protected static UUID generateUuid(byte[] data) {
    ByteBuffer byteBuffer = ByteBuffer.wrap(data);

    long msb = byteBuffer.getLong(0);
    long lsb = byteBuffer.getLong(8);

    UUID uuid = new UUID(msb, lsb);

    return uuid;//from w ww  .  j av  a 2 s  .  co m
}

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From source file:com.inmobi.messaging.util.AuditUtil.java

public static long getTimestamp(byte[] msg) {
    if (isValidHeaders(msg)) {
        ByteBuffer buffer = ByteBuffer.wrap(msg);
        return buffer.getLong(POSITION_OF_TIMESTAMP);
    } else// w  w w  .  j a v  a 2s . c o  m
        return -1;
}

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From source file:Main.java

/**
 * Parse UUID from bytes. The {@code uuidBytes} can represent a 16-bit, 32-bit or 128-bit UUID,
 * but the returned UUID is always in 128-bit format.
 * Note UUID is little endian in Bluetooth.
 *
 * @param uuidBytes Byte representation of uuid.
 * @return {@link ParcelUuid} parsed from bytes.
 * @throws IllegalArgumentException If the {@code uuidBytes} cannot be parsed.
 *//*from w w  w  .  j  a v  a  2 s.  c  om*/
public static ParcelUuid parseUuidFrom(byte[] uuidBytes) {
    if (uuidBytes == null) {
        throw new IllegalArgumentException("uuidBytes cannot be null");
    }
    int length = uuidBytes.length;
    if (length != UUID_BYTES_16_BIT && length != UUID_BYTES_32_BIT && length != UUID_BYTES_128_BIT) {
        throw new IllegalArgumentException("uuidBytes length invalid - " + length);
    }

    // Construct a 128 bit UUID.
    if (length == UUID_BYTES_128_BIT) {
        ByteBuffer buf = ByteBuffer.wrap(uuidBytes).order(ByteOrder.LITTLE_ENDIAN);
        long msb = buf.getLong(8);
        long lsb = buf.getLong(0);
        return new ParcelUuid(new UUID(msb, lsb));
    }

    // For 16 bit and 32 bit UUID we need to convert them to 128 bit value.
    // 128_bit_value = uuid * 2^96 + BASE_UUID
    long shortUuid;
    if (length == UUID_BYTES_16_BIT) {
        shortUuid = uuidBytes[0] & 0xFF;
        shortUuid += (uuidBytes[1] & 0xFF) << 8;
    } else {
        shortUuid = uuidBytes[0] & 0xFF;
        shortUuid += (uuidBytes[1] & 0xFF) << 8;
        shortUuid += (uuidBytes[2] & 0xFF) << 16;
        shortUuid += (uuidBytes[3] & 0xFF) << 24;
    }
    long msb = BASE_UUID.getUuid().getMostSignificantBits() + (shortUuid << 32);
    long lsb = BASE_UUID.getUuid().getLeastSignificantBits();
    return new ParcelUuid(new UUID(msb, lsb));
}

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From source file:org.bimserver.utils.BinUtils.java

public static long byteArrayToLong(byte[] value, int index) {
    ByteBuffer byteBuffer = ByteBuffer.wrap(value);
    return byteBuffer.getLong(index);
}

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From source file:net.geertvos.theater.core.util.UUIDGen.java

/** creates a type 1 uuid from raw bytes. */
public static UUID getUUID(ByteBuffer raw) {
    return new UUID(raw.getLong(raw.position()), raw.getLong(raw.position() + 8));
}

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From source file:org.cryptomator.crypto.aes256.AesSivCipherUtil.java

static byte[] sivEncrypt(byte[] aesKey, byte[] macKey, byte[] plaintext, byte[]... additionalData)
        throws InvalidKeyException {
    if (aesKey.length != 16 && aesKey.length != 24 && aesKey.length != 32) {
        throw new InvalidKeyException("Invalid aesKey length " + aesKey.length);
    }/*  ww  w.j  av  a 2 s .co m*/

    final byte[] iv = s2v(macKey, plaintext, additionalData);

    final int numBlocks = (plaintext.length + 15) / 16;

    // clear out the 31st and 63rd (rightmost) bit:
    final byte[] ctr = Arrays.copyOf(iv, 16);
    ctr[8] = (byte) (ctr[8] & 0x7F);
    ctr[12] = (byte) (ctr[12] & 0x7F);
    final ByteBuffer ctrBuf = ByteBuffer.wrap(ctr);
    final long initialCtrVal = ctrBuf.getLong(8);

    final byte[] x = new byte[numBlocks * 16];
    final BlockCipher aes = new AESFastEngine();
    aes.init(true, new KeyParameter(aesKey));
    for (int i = 0; i < numBlocks; i++) {
        final long ctrVal = initialCtrVal + i;
        ctrBuf.putLong(8, ctrVal);
        aes.processBlock(ctrBuf.array(), 0, x, i * 16);
        aes.reset();
    }

    final byte[] ciphertext = xor(plaintext, x);

    return ArrayUtils.addAll(iv, ciphertext);
}

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From source file:org.cryptomator.crypto.aes256.AesSivCipherUtil.java

static byte[] sivDecrypt(byte[] aesKey, byte[] macKey, byte[] ciphertext, byte[]... additionalData)
        throws DecryptFailedException, InvalidKeyException {
    if (aesKey.length != 16 && aesKey.length != 24 && aesKey.length != 32) {
        throw new InvalidKeyException("Invalid aesKey length " + aesKey.length);
    }/*from w w w .j  a v a  2 s  . c  o m*/

    final byte[] iv = Arrays.copyOf(ciphertext, 16);

    final byte[] actualCiphertext = Arrays.copyOfRange(ciphertext, 16, ciphertext.length);
    final int numBlocks = (actualCiphertext.length + 15) / 16;

    // clear out the 31st and 63rd (rightmost) bit:
    final byte[] ctr = Arrays.copyOf(iv, 16);
    ctr[8] = (byte) (ctr[8] & 0x7F);
    ctr[12] = (byte) (ctr[12] & 0x7F);
    final ByteBuffer ctrBuf = ByteBuffer.wrap(ctr);
    final long initialCtrVal = ctrBuf.getLong(8);

    final byte[] x = new byte[numBlocks * 16];
    final BlockCipher aes = new AESFastEngine();
    aes.init(true, new KeyParameter(aesKey));
    for (int i = 0; i < numBlocks; i++) {
        final long ctrVal = initialCtrVal + i;
        ctrBuf.putLong(8, ctrVal);
        aes.processBlock(ctrBuf.array(), 0, x, i * 16);
        aes.reset();
    }

    final byte[] plaintext = xor(actualCiphertext, x);

    final byte[] control = s2v(macKey, plaintext, additionalData);

    if (MessageDigest.isEqual(control, iv)) {
        return plaintext;
    } else {
        throw new DecryptFailedException("Authentication failed");
    }
}

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