1 files changed, 146 insertions, 0 deletions
diff --git a/Emby.Server.Implementations/IO/SharpCifs/Util/HMACT64.cs b/Emby.Server.Implementations/IO/SharpCifs/Util/HMACT64.cs
new file mode 100644
index 000000000..9ab31d61b
--- /dev/null
+++ b/Emby.Server.Implementations/IO/SharpCifs/Util/HMACT64.cs
@@ -0,0 +1,146 @@
+// This code is derived from jcifs smb client library <jcifs at samba dot org>
+// Ported by J. Arturo <webmaster at komodosoft dot net>
+//  
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Lesser General Public
+// License as published by the Free Software Foundation; either
+// version 2.1 of the License, or (at your option) any later version.
+// 
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+// 
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+using System;
+using SharpCifs.Util.Sharpen;
+
+namespace SharpCifs.Util
+{
+	/// <summary>This is an implementation of the HMACT64 keyed hashing algorithm.</summary>
+	/// <remarks>
+	/// This is an implementation of the HMACT64 keyed hashing algorithm.
+	/// HMACT64 is defined by Luke Leighton as a modified HMAC-MD5 (RFC 2104)
+	/// in which the key is truncated at 64 bytes (rather than being hashed
+	/// via MD5).
+	/// </remarks>
+	public class Hmact64 : MessageDigest
+	{
+		private const int BlockLength = 64;
+
+		private const byte Ipad = unchecked(unchecked(0x36));
+
+		private const byte Opad = unchecked(unchecked(0x5c));
+
+		private MessageDigest _md5;
+
+		private byte[] _ipad = new byte[BlockLength];
+
+		private byte[] _opad = new byte[BlockLength];
+
+		/// <summary>Creates an HMACT64 instance which uses the given secret key material.</summary>
+		/// <remarks>Creates an HMACT64 instance which uses the given secret key material.</remarks>
+		/// <param name="key">The key material to use in hashing.</param>
+		public Hmact64(byte[] key) 
+		{
+			int length = Math.Min(key.Length, BlockLength);
+			for (int i = 0; i < length; i++)
+			{
+				_ipad[i] = unchecked((byte)(key[i] ^ Ipad));
+				_opad[i] = unchecked((byte)(key[i] ^ Opad));
+			}
+			for (int i1 = length; i1 < BlockLength; i1++)
+			{
+				_ipad[i1] = Ipad;
+				_opad[i1] = Opad;
+			}
+			try
+			{
+				_md5 = GetInstance("MD5");
+			}
+			catch (Exception ex)
+			{
+				throw new InvalidOperationException(ex.Message);
+			}
+			EngineReset();
+		}
+
+
+		protected byte[] EngineDigest()
+		{
+			byte[] digest = _md5.Digest();
+			_md5.Update(_opad);
+			return _md5.Digest(digest);
+		}
+
+		protected int EngineDigest(byte[] buf, int offset, int len)
+		{
+			byte[] digest = _md5.Digest();
+			_md5.Update(_opad);
+			_md5.Update(digest);
+			try
+			{
+				_md5.Digest(buf, offset, len);
+
+			    return len;
+			}
+			catch (Exception)
+			{
+				throw new InvalidOperationException();
+			}
+		}
+
+		protected int EngineGetDigestLength()
+		{
+			return _md5.GetDigestLength();
+		}
+
+		protected void EngineReset()
+		{
+			_md5.Reset();
+			_md5.Update(_ipad);
+		}
+
+		protected void EngineUpdate(byte b)
+		{
+			_md5.Update(b);
+		}
+
+		protected void EngineUpdate(byte[] input, int offset, int len)
+		{
+			_md5.Update(input, offset, len);
+		}
+
+        public override byte[] Digest()
+        {
+            return EngineDigest();
+        }
+
+        public override int GetDigestLength()
+        {
+            return EngineGetDigestLength();
+        }
+
+        public override void Reset()
+        {
+            EngineReset();
+        }
+
+        public override void Update(byte[] b)
+        {
+            EngineUpdate(b, 0, b.Length);
+        }
+
+        public override void Update(byte b)
+        {
+            EngineUpdate(b);
+        }
+
+        public override void Update(byte[] b, int offset, int len)
+        {
+            EngineUpdate(b, offset, len);
+        }
+    }
+}