init commit

output/Libraries/BouncyCastle.Crypto/Org/BouncyCastle/Crypto/IO/DigestSink.cs

@@ -0,0 +1,28 @@
+using Org.BouncyCastle.Utilities.IO;
+
+namespace Org.BouncyCastle.Crypto.IO;
+
+public class DigestSink : BaseOutputStream
+{
+	private readonly IDigest mDigest;
+
+	public virtual IDigest Digest => mDigest;
+
+	public DigestSink(IDigest digest)
+	{
+		mDigest = digest;
+	}
+
+	public override void WriteByte(byte b)
+	{
+		mDigest.Update(b);
+	}
+
+	public override void Write(byte[] buf, int off, int len)
+	{
+		if (len > 0)
+		{
+			mDigest.BlockUpdate(buf, off, len);
+		}
+	}
+}