/// <summary>
/// Decrypts the packet data
/// </summary>
private void Decrypt(byte[] data)
{
if (!RecvCipher.Handshaken)
{
RecvCipher.RecvHandshake(ref data);
ArrayReader pr = new ArrayReader(data);
pr.ReadShort(); //Version
pr.ReadMapleString(); //Sub Version
uint siv = pr.ReadUInt();
uint riv = pr.ReadUInt();
SendCipher.SetIV(siv);
RecvCipher.SetIV(riv);
if (HandshakeFinished != null)
{
HandshakeFinished(siv, riv);
}
}
else
{
RecvCipher.Decrypt(ref data);
if (data.Length == 0)
{
return;
}
if (PacketFinished != null)
{
PacketFinished(data);
}
}
Wait();
}
/// <summary>
/// Decrypts the packet data
/// </summary>
private void Decrypt(byte[] data)
{
if (!RecvCipher.Handshaken)
{
RecvCipher.Handshake(ref data);
ArrayReader pr = new ArrayReader(data);
Console.WriteLine("Server version {0}.{1}", pr.ReadShort(), pr.ReadMapleString());
uint siv = pr.ReadUInt();
uint riv = pr.ReadUInt();
SendCipher.SetIV(siv);
RecvCipher.SetIV(riv);
if (HandshakeFinished != null)
{
HandshakeFinished(siv, riv);
}
}
else
{
RecvCipher.Decrypt(ref data);
if (data.Length == 0)
{
return;
}
if (PacketFinished != null)
{
PacketFinished(data);
}
}
Wait();
}
/// <summary>
/// Decrypts the packet data
/// </summary>
public void Decrypt(Span <byte> data)
{
if (!RecvCipher.Handshaken)
{
var pr = new BinaryReader(new MemoryStream(MapleCipher.Handshake(data).ToArray(), false),
Encoding.ASCII);
var version = pr.ReadInt16();
var subVersionLength = pr.ReadInt16();
var subVersion = new string(pr.ReadChars(subVersionLength));
var siv = pr.ReadUInt32();
var riv = pr.ReadUInt32();
var serverType = pr.ReadByte();
SendCipher.SetIv(siv);
RecvCipher.SetIv(riv);
HandshakeFinished?.Invoke(siv, riv, version, subVersion, serverType);
}
else
{
if (!RecvCipher.CheckHeader(data, !ToClient))
{
throw new InvalidOperationException($"Packet header mismatch Size:{data.Length}");
}
var decrypted = RecvCipher.Decrypt(data);
if (decrypted.Length == 0)
{
return;
}
PacketFinished?.Invoke(decrypted.ToArray());
}
}
/// <summary>
/// Gets the packet header from the current packet.
/// </summary>
private void GetHeader()
{
if (!RecvCipher.Handshaken)
{
WaitMore(BitConverter.ToInt16(buffer, 0));
}
else
{
int packetLength = RecvCipher.GetPacketLength(buffer);
WaitMore(packetLength);
}
}
/// <summary>
/// Sets the Recv and Send Vectors for the ciphers
/// </summary>
public void SetVectors(uint SIV, uint RIV)
{
SendCipher.SetIV(SIV);
RecvCipher.SetIV(RIV);
}
/// <summary>
/// Sets the Recv and Send Vectors for the ciphers
/// </summary>
public void SetVectors(uint siv, uint riv)
{
SendCipher.SetIv(siv);
RecvCipher.SetIv(riv);
}