QPacket Checksum Algorithm

QPacket Checksum Algorithm

this checksum algorithm uses the key from yeti.ini in its calculation

Example Code

`

public static readonly string keyCheckSum = "8dtRv2oj";

private byte CalcChecksum(byte[] Data)
{
	int[] Buf = new int[Data.Length >> 2];
	Buffer.BlockCopy(Data, 0, Buf, 0, Buf.Length << 2);
	byte[] Sum = new byte[4];
	Buffer.BlockCopy(new long[] { Buf.Sum(x => (long)x) }, 0, Sum, 0, 4);
	int Checksum = (byte)Encoding.ASCII.GetBytes(keyCheckSum).Sum(b => b);
	if ((Data.Length & 3) != 0)
		Checksum += Data.Skip(Data.Length & ~3).Sum(b => b);
	return (byte)(Checksum + Sum.Sum(b => b));
}`