/// <summary>
/// Creates a new crypto decorator for the <see cref="NetworkClientBase"/>.
/// Extends the <see cref="ReadAsync"/> and <see cref="WriteAsync"/> implementations to pass
/// all bytes through the corresponding incoming and outgoing ciphers.
/// </summary>
/// <param name="decoratedClient">The client to decorate.</param>
/// <param name="encryptionServiceProvider">The encryption service.</param>
/// <param name="decryptionServiceProvider">The decryption service.</param>
public NetworkClientFixedBlockSizeCryptoDecorator(NetworkClientBase decoratedClient, ICryptoServiceProvider encryptionServiceProvider, ICryptoServiceProvider decryptionServiceProvider, int blockSize, int cryptoBufferSize = 30000)
{
if (decoratedClient == null)
{
throw new ArgumentNullException(nameof(decoratedClient));
}
if (encryptionServiceProvider == null)
{
throw new ArgumentNullException(nameof(encryptionServiceProvider));
}
if (decryptionServiceProvider == null)
{
throw new ArgumentNullException(nameof(decryptionServiceProvider));
}
if (blockSize <= 0)
{
throw new ArgumentOutOfRangeException(nameof(blockSize));
}
DecoratedClient = decoratedClient;
EncryptionServiceProvider = encryptionServiceProvider;
DecryptionServiceProvider = decryptionServiceProvider;
BlockSize = blockSize;
//One of the lobby packets is 14,000 bytes. We may even need bigger.
ReadBuffer = new AsyncLockableBuffer(cryptoBufferSize);
WriteBuffer = new AsyncLockableBuffer(cryptoBufferSize);
CryptoBlockOverflow = new byte[Math.Max(blockSize - 1, 0)]; //we only need
CryptoBlockOverflowReadIndex = CryptoBlockOverflow.Length; //set this to last index to indicate empty initially
}
public NetworkClientBufferWriteUntilSizeReachedDecorator(NetworkClientBase decoratedClient, int bufferedWaitSize, int bufferedCombinedSize = 30000)
{
if (decoratedClient == null)
{
throw new ArgumentNullException(nameof(decoratedClient));
}
if (bufferedWaitSize <= 1)
{
throw new ArgumentOutOfRangeException(nameof(bufferedWaitSize), "Do not use this decorator if you don't need buffered data.");
}
DecoratedClient = decoratedClient;
BufferedData = new AsyncLockableBuffer(bufferedWaitSize);
CombinedBuffer = new AsyncLockableBuffer(bufferedCombinedSize);
}