1 files changed, 45 insertions, 0 deletions
diff --git a/Crypto/src/crypto/tls/TlsDeflateCompression.cs b/Crypto/src/crypto/tls/TlsDeflateCompression.cs
new file mode 100644
index 000000000..146c961c7
--- /dev/null
+++ b/Crypto/src/crypto/tls/TlsDeflateCompression.cs
@@ -0,0 +1,45 @@
+using System;
+using System.IO;
+
+using Org.BouncyCastle.Utilities.Zlib;
+
+namespace Org.BouncyCastle.Crypto.Tls
+{
+ public class TlsDeflateCompression
+ : TlsCompression
+ {
+ protected ZStream zIn, zOut;
+
+ public TlsDeflateCompression()
+ {
+ this.zIn = new ZStream();
+ this.zIn.inflateInit();
+
+ this.zOut = new ZStream();
+ // TODO Allow custom setting
+ this.zOut.deflateInit(JZlib.Z_DEFAULT_COMPRESSION);
+ }
+
+ public virtual Stream Compress(Stream output)
+ {
+ return new DeflateOutputStream(output, zOut, true);
+ }
+
+ public virtual Stream Decompress(Stream output)
+ {
+ return new DeflateOutputStream(output, zIn, false);
+ }
+
+ protected class DeflateOutputStream : ZOutputStream
+ {
+ public DeflateOutputStream(Stream output, ZStream z, bool compress)
+ : base(output)
+ {
+ this.z = z;
+ this.compress = compress;
+ // TODO http://www.bolet.org/~pornin/deflate-flush.html says we should use Z_SYNC_FLUSH
+ this.FlushMode = JZlib.Z_PARTIAL_FLUSH;
+ }
+ }
+ }
+}
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