} // func ReadStreamData
private static (string hashName, byte[] hashValue) CopyData(bool shouldDeflate, Stream srcStream, byte[] buf, int readed, Stream dstStream)
{
// pack destination stream
var dst = shouldDeflate
? new GZipStream(dstStream, CompressionMode.Compress, true)
: dstStream;
using (var dstHashStream = new HashStream(dst, HashStreamDirection.Write, false, SHA256.Create()))
{
try
{
// copy stream into file
dstHashStream.Write(buf, 0, readed);
srcStream.CopyTo(dst);
}
finally
{
dstHashStream.Flush();
dstHashStream.Dispose();
}
dstHashStream.Close();
return("SHA2_256", dstHashStream.HashSum);
}
} // func CopyData
public void TestHashStream()
{
var hash = Create();
var stream = new MemoryStream();
var hashStream = new HashStream <THash>(stream, hash);
Assert.AreEqual(stream.CanRead, hashStream.CanRead);
Assert.AreEqual(stream.CanWrite, hashStream.CanWrite);
Assert.AreEqual(stream.CanSeek, hashStream.CanSeek);
stream.Write(new byte[10], 0, 10);
Assert.AreEqual(stream.Position, hashStream.Position);
hashStream.Position = 0;
Assert.AreEqual(0, hashStream.Position);
Assert.AreEqual(stream.Position, hashStream.Position);
hashStream.SetLength(5);
Assert.AreEqual(stream.Length, hashStream.Length);
hashStream.Flush();
hashStream.Seek(1, SeekOrigin.Begin);
Assert.AreEqual(1, hashStream.Position);
Assert.AreEqual(stream.Position, hashStream.Position);
}
public override void Flush()
{
HashStream.Flush();
base.Flush();
}