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