init commit

output/Libraries/BouncyCastle.Crypto/Org/BouncyCastle/Crypto/Tls/TlsDeflateCompression.cs

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+using System.IO;
+using Org.BouncyCastle.Utilities.Zlib;
+
+namespace Org.BouncyCastle.Crypto.Tls;
+
+public class TlsDeflateCompression : TlsCompression
+{
+	protected class DeflateOutputStream : ZOutputStream
+	{
+		public DeflateOutputStream(Stream output, ZStream z, bool compress)
+			: base(output, z)
+		{
+			base.compress = compress;
+			FlushMode = 2;
+		}
+
+		public override void Flush()
+		{
+		}
+	}
+
+	public const int LEVEL_NONE = 0;
+
+	public const int LEVEL_FASTEST = 1;
+
+	public const int LEVEL_SMALLEST = 9;
+
+	public const int LEVEL_DEFAULT = -1;
+
+	protected readonly ZStream zIn;
+
+	protected readonly ZStream zOut;
+
+	public TlsDeflateCompression()
+		: this(-1)
+	{
+	}
+
+	public TlsDeflateCompression(int level)
+	{
+		zIn = new ZStream();
+		zIn.inflateInit();
+		zOut = new ZStream();
+		zOut.deflateInit(level);
+	}
+
+	public virtual Stream Compress(Stream output)
+	{
+		return new DeflateOutputStream(output, zOut, compress: true);
+	}
+
+	public virtual Stream Decompress(Stream output)
+	{
+		return new DeflateOutputStream(output, zIn, compress: false);
+	}
+}