init commit

output/Libraries/BouncyCastle.Crypto/Org/BouncyCastle/Crmf/PKMacStreamCalculator.cs

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+using System.IO;
+using Org.BouncyCastle.Crypto;
+using Org.BouncyCastle.Crypto.IO;
+
+namespace Org.BouncyCastle.Crmf;
+
+internal class PKMacStreamCalculator : IStreamCalculator
+{
+	private readonly MacSink _stream;
+
+	public Stream Stream => _stream;
+
+	public PKMacStreamCalculator(IMac mac)
+	{
+		_stream = new MacSink(mac);
+	}
+
+	public object GetResult()
+	{
+		return new DefaultPKMacResult(_stream.Mac);
+	}
+}