//
// DataProtectionSecurityStateEncoder.cs
//
// Author:
//	Atsushi Enomoto <atsushi@ximian.com>
//
// Copyright (C) 2006-2007 Novell, Inc.  http://www.novell.com
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
// 
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
using System.Security.Cryptography;

namespace System.ServiceModel.Security
{
	public class DataProtectionSecurityStateEncoder : SecurityStateEncoder
	{
		public DataProtectionSecurityStateEncoder ()
			: this (true)
		{
		}

		public DataProtectionSecurityStateEncoder (bool useCurrentUserProtectionScope)
		{
			user = useCurrentUserProtectionScope;
		}

		public DataProtectionSecurityStateEncoder (bool useCurrentUserProtectionScope, byte [] entropy)
		{
			user = useCurrentUserProtectionScope;
			this.entropy = entropy;
		}

		bool user;
		byte [] entropy;

		public bool UseCurrentUserProtectionScope {
			get { return user; }
		}

		public byte [] GetEntropy ()
		{
			return entropy == null ? null : (byte []) entropy.Clone ();
		}

		[MonoTODO]
		public override string ToString ()
		{
			return base.ToString ();
		}

		protected internal override byte [] DecodeSecurityState (byte [] data)
		{
			return ProtectedData.Unprotect (data, entropy, DataProtectionScope.CurrentUser);
		}

		protected internal override byte [] EncodeSecurityState (byte [] data)
		{
			return ProtectedData.Protect (data, entropy, DataProtectionScope.CurrentUser);
		}
	}
}