1 files changed, 68 insertions, 0 deletions
diff --git a/Emby.Server.Implementations/IO/SharpCifs/Util/RC4.cs b/Emby.Server.Implementations/IO/SharpCifs/Util/RC4.cs
new file mode 100644
index 000000000..b17e076e7
--- /dev/null
+++ b/Emby.Server.Implementations/IO/SharpCifs/Util/RC4.cs
@@ -0,0 +1,68 @@
+// 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
+namespace SharpCifs.Util
+{
+	public class Rc4
+	{
+		internal byte[] S;
+
+		internal int I;
+
+		internal int J;
+
+		public Rc4()
+		{
+		}
+
+		public Rc4(byte[] key)
+		{
+			Init(key, 0, key.Length);
+		}
+
+		public virtual void Init(byte[] key, int ki, int klen)
+		{
+			S = new byte[256];
+			for (I = 0; I < 256; I++)
+			{
+				S[I] = unchecked((byte)I);
+			}
+			for (I = J = 0; I < 256; I++)
+			{
+				J = (J + key[ki + I % klen] + S[I]) & unchecked(0xff);
+				byte t = S[I];
+				S[I] = S[J];
+				S[J] = t;
+			}
+			I = J = 0;
+		}
+
+		public virtual void Update(byte[] src, int soff, int slen, byte[] dst, int doff)
+		{
+			int slim;
+			slim = soff + slen;
+			while (soff < slim)
+			{
+				I = (I + 1) & unchecked(0xff);
+				J = (J + S[I]) & unchecked(0xff);
+				byte t = S[I];
+				S[I] = S[J];
+				S[J] = t;
+				dst[doff++] = unchecked((byte)(src[soff++] ^ S[(S[I] + S[J]) & unchecked(0xff)]));
+			}
+		}
+	}
+}