Examples with IsaacRandom org.apollo.util.security.IsaacRandom used on opensource projects

Example 1 with IsaacRandom

use of org.apollo.util.security.IsaacRandom in project apollo by apollo-rsps.

the class LoginDecoder method decodePayload.

/**
 * Decodes in the payload state.
 *
 * @param ctx The channel handler context.
 * @param buffer The buffer.
 * @param out The {@link List} of objects to pass forward through the pipeline.
 */
private void decodePayload(ChannelHandlerContext ctx, ByteBuf buffer, List<Object> out) {
    if (buffer.readableBytes() >= loginLength) {
        ByteBuf payload = buffer.readBytes(loginLength);
        int version = 255 - payload.readUnsignedByte();
        int release = payload.readUnsignedShort();
        int memoryStatus = payload.readUnsignedByte();
        if (memoryStatus != 0 && memoryStatus != 1) {
            logger.fine("Login memoryStatus (" + memoryStatus + ") not in expected range of [0, 1].");
            writeResponseCode(ctx, LoginConstants.STATUS_LOGIN_SERVER_REJECTED_SESSION);
            return;
        }
        boolean lowMemory = memoryStatus == 1;
        int[] crcs = new int[FileSystemConstants.ARCHIVE_COUNT];
        for (int index = 0; index < 9; index++) {
            crcs[index] = payload.readInt();
        }
        int length = payload.readUnsignedByte();
        if (length != loginLength - 41) {
            logger.fine("Login packet unexpected length (" + length + ")");
            writeResponseCode(ctx, LoginConstants.STATUS_LOGIN_SERVER_REJECTED_SESSION);
            return;
        }
        ByteBuf secure = payload.readBytes(length);
        BigInteger value = new BigInteger(secure.array());
        value = value.modPow(NetworkConstants.RSA_EXPONENT, NetworkConstants.RSA_MODULUS);
        secure = Unpooled.wrappedBuffer(value.toByteArray());
        int id = secure.readUnsignedByte();
        if (id != 10) {
            logger.fine("Unable to read id from secure payload.");
            writeResponseCode(ctx, LoginConstants.STATUS_LOGIN_SERVER_REJECTED_SESSION);
            return;
        }
        long clientSeed = secure.readLong();
        long reportedSeed = secure.readLong();
        if (reportedSeed != serverSeed) {
            logger.fine("Reported seed differed from server seed.");
            writeResponseCode(ctx, LoginConstants.STATUS_LOGIN_SERVER_REJECTED_SESSION);
            return;
        }
        int uid = secure.readInt();
        String username = BufferUtil.readString(secure);
        String password = BufferUtil.readString(secure);
        InetSocketAddress socketAddress = (InetSocketAddress) ctx.channel().remoteAddress();
        String hostAddress = InetAddresses.toAddrString(socketAddress.getAddress());
        if (password.length() < 6 || password.length() > 20 || username.isEmpty() || username.length() > 12) {
            logger.fine("Username ('" + username + "') or password did not pass validation.");
            writeResponseCode(ctx, LoginConstants.STATUS_INVALID_CREDENTIALS);
            return;
        }
        int[] seed = new int[4];
        seed[0] = (int) (clientSeed >> 32);
        seed[1] = (int) clientSeed;
        seed[2] = (int) (serverSeed >> 32);
        seed[3] = (int) serverSeed;
        IsaacRandom decodingRandom = new IsaacRandom(seed);
        for (int index = 0; index < seed.length; index++) {
            seed[index] += 50;
        }
        IsaacRandom encodingRandom = new IsaacRandom(seed);
        PlayerCredentials credentials = new PlayerCredentials(username, password, usernameHash, uid, hostAddress);
        IsaacRandomPair randomPair = new IsaacRandomPair(encodingRandom, decodingRandom);
        out.add(new LoginRequest(credentials, randomPair, reconnecting, lowMemory, release, crcs, version));
    }
}

Example 2 with IsaacRandom

use of org.apollo.util.security.IsaacRandom in project apollo by apollo-rsps.

the class GamePacketEncoderTests method encode.

/**
 * Tests the {@link GamePacketEncoder#encode} method.
 *
 * @throws Exception If an error occurs.
 */
@Test
public void encode() throws Exception {
    // generates 243, 141, 34, -223, 121...
    IsaacRandom random = new IsaacRandom(new int[] { 0, 0, 0, 0 });
    GamePacketEncoder encoder = new GamePacketEncoder(random);
    ByteBuf payload = Unpooled.wrappedBuffer("Hello".getBytes());
    GamePacket packet = new GamePacket(10, PacketType.FIXED, payload.copy());
    ByteBuf out = Unpooled.buffer();
    encoder.encode(null, packet, out);
    assertEquals(6, out.readableBytes());
    assertEquals(253, out.readUnsignedByte());
    assertEquals('H', out.readUnsignedByte());
    assertEquals('e', out.readUnsignedByte());
    assertEquals('l', out.readUnsignedByte());
    assertEquals('l', out.readUnsignedByte());
    assertEquals('o', out.readUnsignedByte());
    packet = new GamePacket(9, PacketType.VARIABLE_BYTE, payload.copy());
    out.clear();
    encoder.encode(null, packet, out);
    assertEquals(7, out.readableBytes());
    assertEquals(150, out.readUnsignedByte());
    assertEquals(5, out.readUnsignedByte());
    assertEquals('H', out.readUnsignedByte());
    assertEquals('e', out.readUnsignedByte());
    assertEquals('l', out.readUnsignedByte());
    assertEquals('l', out.readUnsignedByte());
    assertEquals('o', out.readUnsignedByte());
    packet = new GamePacket(0, PacketType.VARIABLE_SHORT, payload.copy());
    out.clear();
    encoder.encode(null, packet, out);
    assertEquals(8, out.readableBytes());
    assertEquals(34, out.readUnsignedByte());
    assertEquals(5, out.readUnsignedShort());
    assertEquals('H', out.readUnsignedByte());
    assertEquals('e', out.readUnsignedByte());
    assertEquals('l', out.readUnsignedByte());
    assertEquals('l', out.readUnsignedByte());
    assertEquals('o', out.readUnsignedByte());
}