/// <summary>
/// Encrypts packet data
/// </summary>
public Span <byte> Encrypt(ReadOnlySpan <byte> data, bool toClient)
{
if (!Handshaken || MapleIv == null)
{
return(null);
}
var newData = new byte[data.Length + 4].AsSpan();
var header = newData.Slice(0, 4);
var content = newData.Slice(4, data.Length);
data.CopyTo(content);
if (toClient)
{
WriteHeaderToClient(header, data.Length);
}
else
{
WriteHeaderToServer(header, data.Length);
}
EncryptShanda(content);
AesCipher?.AesTransform(content, MapleIv.Bytes);
MapleIv.Shuffle();
return(newData);
}
/// <summary>
/// Decrypts a maple packet contained in <paramref name="data"/>
/// </summary>
/// <param name="data">Data to decrypt</param>
public Span <byte> Decrypt(Span <byte> data)
{
if (!Handshaken || MapleIv == null)
{
return(data);
}
var header = data.Slice(0, 4);
var length = GetPacketLength(header);
var content = data.Slice(4, length);
AesCipher?.AesTransform(content, MapleIv.Bytes);
MapleIv.Shuffle();
DecryptShanda(content);
return(content);
}