init commit

output/Libraries/BouncyCastle.Crypto/Org/BouncyCastle/Crypto/Digests/NullDigest.cs

@@ -0,0 +1,48 @@
+using System.IO;
+using Org.BouncyCastle.Utilities.IO;
+
+namespace Org.BouncyCastle.Crypto.Digests;
+
+public class NullDigest : IDigest
+{
+	private readonly MemoryStream bOut = new MemoryStream();
+
+	public string AlgorithmName => "NULL";
+
+	public int GetByteLength()
+	{
+		return 0;
+	}
+
+	public int GetDigestSize()
+	{
+		return (int)bOut.Length;
+	}
+
+	public void Update(byte b)
+	{
+		bOut.WriteByte(b);
+	}
+
+	public void BlockUpdate(byte[] inBytes, int inOff, int len)
+	{
+		bOut.Write(inBytes, inOff, len);
+	}
+
+	public int DoFinal(byte[] outBytes, int outOff)
+	{
+		try
+		{
+			return Streams.WriteBufTo(bOut, outBytes, outOff);
+		}
+		finally
+		{
+			Reset();
+		}
+	}
+
+	public void Reset()
+	{
+		bOut.SetLength(0L);
+	}
+}