public override byte[] Decrypt(byte[] data)
{
lock (this)
{
using (ByteBuffer buffer = new ByteBuffer(data))
{
byte[] header = buffer.ReadBytes(4);
if (!this.Decryptograph.IsValidPacket(header))
{
throw new CryptographyException("Invalid header.");
}
byte[] content = buffer.GetContent();
int length = AesCryptograph.RetrieveLength(header);
if (content.Length == length)
{
this.Decryptograph.Crypt(content);
BlurCryptograph.Decrypt(content);
return(content);
}
else
{
throw new CryptographyException(string.Format("Packet length not matching ({0} != {1}).", content.Length, length));
}
}
}
}
public override byte[] Encrypt(byte[] data)
{
lock (this)
{
byte[] result = new byte[data.Length];
Buffer.BlockCopy(data, 0, result, 0, data.Length);
byte[] header = this.Encryptograph.GenerateHeader(result.Length);
BlurCryptograph.Encrypt(result);
this.Encryptograph.Crypt(result);
using (ByteBuffer buffer = new ByteBuffer(data.Length + 4))
{
buffer.WriteBytes(header);
buffer.WriteBytes(result);
return(buffer.Array);
}
}
}