diff --git a/Crypto/src/util/zlib/JZlib.cs b/Crypto/src/util/zlib/JZlib.cs
new file mode 100644
index 000000000..4f2cfdaa9
--- /dev/null
+++ b/Crypto/src/util/zlib/JZlib.cs
@@ -0,0 +1,73 @@
+using System;
+/*
+ * $Id: JZlib.cs,v 1.3 2011-02-15 05:46:04 bouncy Exp $
+ *
+Copyright (c) 2000,2001,2002,2003 ymnk, JCraft,Inc. All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+ 1. Redistributions of source code must retain the above copyright notice,
+ this list of conditions and the following disclaimer.
+
+ 2. Redistributions in binary form must reproduce the above copyright
+ notice, this list of conditions and the following disclaimer in
+ the documentation and/or other materials provided with the distribution.
+
+ 3. The names of the authors may not be used to endorse or promote products
+ derived from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
+INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JCRAFT,
+INC. OR ANY CONTRIBUTORS TO THIS SOFTWARE BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
+OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
+EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+/*
+ * This program is based on zlib-1.1.3, so all credit should go authors
+ * Jean-loup Gailly(jloup@gzip.org) and Mark Adler(madler@alumni.caltech.edu)
+ * and contributors of zlib.
+ */
+
+namespace Org.BouncyCastle.Utilities.Zlib {
+
+ public sealed class JZlib{
+ private const String _version="1.0.7";
+ public static String version()
+ {
+ return _version;
+ }
+
+ // compression levels
+ public const int Z_NO_COMPRESSION=0;
+ public const int Z_BEST_SPEED=1;
+ public const int Z_BEST_COMPRESSION=9;
+ public const int Z_DEFAULT_COMPRESSION=-1;
+
+ // compression strategy
+ public const int Z_FILTERED=1;
+ public const int Z_HUFFMAN_ONLY=2;
+ public const int Z_DEFAULT_STRATEGY=0;
+
+ public const int Z_NO_FLUSH=0;
+ public const int Z_PARTIAL_FLUSH=1;
+ public const int Z_SYNC_FLUSH=2;
+ public const int Z_FULL_FLUSH=3;
+ public const int Z_FINISH=4;
+
+ public const int Z_OK=0;
+ public const int Z_STREAM_END=1;
+ public const int Z_NEED_DICT=2;
+ public const int Z_ERRNO=-1;
+ public const int Z_STREAM_ERROR=-2;
+ public const int Z_DATA_ERROR=-3;
+ public const int Z_MEM_ERROR=-4;
+ public const int Z_BUF_ERROR=-5;
+ public const int Z_VERSION_ERROR=-6;
+ }
+}
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