init commit

output/Libraries/BouncyCastle.Crypto/Org/BouncyCastle/Cms/CmsCompressedData.cs

@@ -0,0 +1,70 @@
+using System.IO;
+using Org.BouncyCastle.Asn1;
+using Org.BouncyCastle.Asn1.Cms;
+using Org.BouncyCastle.Utilities;
+using Org.BouncyCastle.Utilities.Zlib;
+
+namespace Org.BouncyCastle.Cms;
+
+public class CmsCompressedData
+{
+	internal ContentInfo contentInfo;
+
+	public ContentInfo ContentInfo => contentInfo;
+
+	public CmsCompressedData(byte[] compressedData)
+		: this(CmsUtilities.ReadContentInfo(compressedData))
+	{
+	}
+
+	public CmsCompressedData(Stream compressedDataStream)
+		: this(CmsUtilities.ReadContentInfo(compressedDataStream))
+	{
+	}
+
+	public CmsCompressedData(ContentInfo contentInfo)
+	{
+		this.contentInfo = contentInfo;
+	}
+
+	public byte[] GetContent()
+	{
+		CompressedData instance = CompressedData.GetInstance(contentInfo.Content);
+		ContentInfo encapContentInfo = instance.EncapContentInfo;
+		Asn1OctetString asn1OctetString = (Asn1OctetString)encapContentInfo.Content;
+		ZInputStream zInputStream = new ZInputStream(asn1OctetString.GetOctetStream());
+		try
+		{
+			return CmsUtilities.StreamToByteArray(zInputStream);
+		}
+		catch (IOException e)
+		{
+			throw new CmsException("exception reading compressed stream.", e);
+		}
+		finally
+		{
+			Platform.Dispose(zInputStream);
+		}
+	}
+
+	public byte[] GetContent(int limit)
+	{
+		CompressedData instance = CompressedData.GetInstance(contentInfo.Content);
+		ContentInfo encapContentInfo = instance.EncapContentInfo;
+		Asn1OctetString asn1OctetString = (Asn1OctetString)encapContentInfo.Content;
+		ZInputStream inStream = new ZInputStream(new MemoryStream(asn1OctetString.GetOctets(), writable: false));
+		try
+		{
+			return CmsUtilities.StreamToByteArray(inStream, limit);
+		}
+		catch (IOException e)
+		{
+			throw new CmsException("exception reading compressed stream.", e);
+		}
+	}
+
+	public byte[] GetEncoded()
+	{
+		return contentInfo.GetEncoded();
+	}
+}