1 files changed, 50 insertions, 0 deletions
diff --git a/crypto/src/openpgp/PgpCompressedData.cs b/crypto/src/openpgp/PgpCompressedData.cs
new file mode 100644
index 000000000..e64a17c9c
--- /dev/null
+++ b/crypto/src/openpgp/PgpCompressedData.cs
@@ -0,0 +1,50 @@
+using System.IO;
+
+using Org.BouncyCastle.Apache.Bzip2;
+using Org.BouncyCastle.Utilities.Zlib;
+
+namespace Org.BouncyCastle.Bcpg.OpenPgp
+{
+ /// <remarks>Compressed data objects</remarks>
+ public class PgpCompressedData
+ : PgpObject
+ {
+ private readonly CompressedDataPacket data;
+
+ public PgpCompressedData(
+ BcpgInputStream bcpgInput)
+ {
+ data = (CompressedDataPacket) bcpgInput.ReadPacket();
+ }
+
+ /// <summary>The algorithm used for compression</summary>
+ public CompressionAlgorithmTag Algorithm
+ {
+ get { return data.Algorithm; }
+ }
+
+ /// <summary>Get the raw input stream contained in the object.</summary>
+ public Stream GetInputStream()
+ {
+ return data.GetInputStream();
+ }
+
+ /// <summary>Return an uncompressed input stream which allows reading of the compressed data.</summary>
+ public Stream GetDataStream()
+ {
+ switch (Algorithm)
+ {
+ case CompressionAlgorithmTag.Uncompressed:
+ return GetInputStream();
+ case CompressionAlgorithmTag.Zip:
+ return new ZInputStream(GetInputStream(), true);
+ case CompressionAlgorithmTag.ZLib:
+ return new ZInputStream(GetInputStream());
+ case CompressionAlgorithmTag.BZip2:
+ return new CBZip2InputStream(GetInputStream());
+ default:
+ throw new PgpException("can't recognise compression algorithm: " + Algorithm);
+ }
+ }
+ }
+}
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