Clever Geek Handbook

Easy way to generate XOR checksum in a stream?

In C # is there an easy way to generate an XOR checksum on a MemoryStream (binary) excluding the first and last two bytes?

Also, is it easier to extend the BinaryWriter and do it as the stream is written?

+3


source to share


1 answer


You can use LINQ to get the answer:



var checksum = memStream
    .GetBuffer() // Get the underlying byte array
    .Skip(1)     // Skip the first byte
    .Take(memStream.Length-3) // One for the beginning, two more for the end
    .Aggregate(0, (p,v) => p ^ v); // XOR the accumulated value and the next byte
+4


source






More articles:


All Articles