Examples with ByteBuf sugar.free.sightparser.pipeline.ByteBuf used on opensource projects

Example 21 with ByteBuf

use of sugar.free.sightparser.pipeline.ByteBuf in project SightRemote by TebbeUbben.

the class AuthLayerMessage method deserialize.

public static AuthLayerMessage deserialize(ByteBuf data, BigInteger lastNonce, byte[] key) throws IllegalAccessException, InstantiationException, SightError {
    // Preamble
    data.shift(4);
    int packetLength = data.readUInt16LE();
    // Packet length XOR
    data.shift(2);
    byte[] crcContent = data.getBytes(packetLength - 10);
    byte[] header = data.getBytes(21);
    byte version = data.readByte();
    byte command = data.readByte();
    Class clazz = MESSAGES.get(command);
    if (clazz == null)
        throw new UnknownAuthMessageError(command);
    int dataLength = data.readUInt16LE();
    long commID = data.readUInt32LE();
    byte[] nonceTrailer = data.getBytes(13);
    byte[] nonce = data.readBytesLE(13);
    byte[] payload = data.readBytes(dataLength);
    byte[] trailer = data.readBytes(8);
    boolean crcPacket = CRCAuthLayerMessage.class.isAssignableFrom(clazz);
    BigInteger nonceInt = new BigInteger(nonce);
    if (version != VERSION) {
        throw new InvalidAuthVersionError(version, VERSION);
    } else if (lastNonce != null && lastNonce.equals(BigInteger.ZERO) && nonceInt.compareTo(lastNonce) != 1) {
        throw new InvalidNonceError(nonce, processNonce(lastNonce.add(BigInteger.ONE)));
    } else {
        if (crcPacket) {
            byte[] crcBytes = new byte[2];
            byte[] rawData = new byte[dataLength - 2];
            System.arraycopy(payload, dataLength - 2, crcBytes, 0, 2);
            System.arraycopy(payload, 0, rawData, 0, dataLength - 2);
            payload = rawData;
            int crc = (crcBytes[0] & 0xFF | (crcBytes[1] & 0xFF) << 8);
            int calculatedCRC = Cryptograph.calculateCRC(crcContent);
            if (crc != calculatedCRC)
                throw new InvalidAuthCRCError(crc, calculatedCRC);
        } else {
            payload = Cryptograph.encryptDataCTR(payload, key, nonceTrailer);
            byte[] calculatedTrailer = Cryptograph.produceCCMTag(nonceTrailer, payload, header, key);
            if (!Arrays.equals(trailer, calculatedTrailer))
                throw new InvalidTrailerError(trailer, calculatedTrailer);
        }
        AuthLayerMessage message = (AuthLayerMessage) clazz.newInstance();
        message.nonce = nonceInt;
        message.commID = commID;
        ByteBuf byteBuf = new ByteBuf(payload.length);
        byteBuf.putBytes(payload);
        message.parse(byteBuf);
        return message;
    }
}

Example 22 with ByteBuf

use of sugar.free.sightparser.pipeline.ByteBuf in project SightRemote by TebbeUbben.

the class AuthLayerMessage method serialize.

public ByteBuf serialize(BigInteger nonce, long commID, byte[] key) {
    byte[] data = getData();
    byte[] nonceBytes = processNonce(nonce);
    byte[] dataEncrypted = Cryptograph.encryptDataCTR(data, key, nonceBytes);
    int dataLength = dataEncrypted.length;
    int length = (short) (29 + dataLength);
    ByteBuf byteBuf = new ByteBuf(length + 8);
    byteBuf.putBytes(MAGIC_HEADER);
    byteBuf.putUInt16LE(length);
    byteBuf.putUInt16LE(~length);
    byteBuf.putByte(VERSION);
    byteBuf.putByte(getCommand());
    byteBuf.putUInt16LE(dataLength);
    byteBuf.putUInt32LE(commID);
    byteBuf.putBytes(nonceBytes);
    byteBuf.putBytes(dataEncrypted);
    byteBuf.putBytes(Cryptograph.produceCCMTag(byteBuf.getBytes(16, 13), data, byteBuf.getBytes(8, 21), key));
    return byteBuf;
}

Example 23 with ByteBuf

use of sugar.free.sightparser.pipeline.ByteBuf in project SightRemote by TebbeUbben.

the class AuthLayerMessage method processNonce.

static byte[] processNonce(BigInteger nonce) {
    byte[] bytes = nonce.toByteArray();
    ByteBuf byteBuf = new ByteBuf(13);
    byteBuf.putBytesLE(bytes);
    byteBuf.putBytes((byte) 0x00, 13 - bytes.length);
    return byteBuf.getBytes();
}

Example 24 with ByteBuf

use of sugar.free.sightparser.pipeline.ByteBuf in project SightRemote by TebbeUbben.

the class WriteDateTimeMessage method getData.

@Override
protected byte[] getData() throws Exception {
    ByteBuf byteBuf = new ByteBuf(7);
    byteBuf.putUInt16LE(year);
    byteBuf.putByte((byte) month);
    byteBuf.putByte((byte) day);
    byteBuf.putByte((byte) hour);
    byteBuf.putByte((byte) minute);
    byteBuf.putByte((byte) second);
    return byteBuf.getBytes();
}

Example 25 with ByteBuf

use of sugar.free.sightparser.pipeline.ByteBuf in project SightRemote by TebbeUbben.

the class ActivateServiceMessage method getData.

@Override
protected byte[] getData() {
    ByteBuf byteBuf = new ByteBuf(19);
    byteBuf.putByte(serviceID);
    byteBuf.putShort(version);
    byteBuf.putBytes(servicePassword);
    return byteBuf.getBytes();
}