mono/mcs/class/System.Security/System.Security.Permissions/DataProtectionPermissionAttribute.cs

//
// System.Security.Permissions.DataProtectionPermissionAttribute class
//
// Author:
//	Sebastien Pouliot  <[email protected]>
//
// Copyright (C) 2004 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.Globalization;

namespace System.Security.Permissions {

	[AttributeUsage (AttributeTargets.Assembly | AttributeTargets.Class |
		AttributeTargets.Struct | AttributeTargets.Constructor | AttributeTargets.Method, 
		AllowMultiple = true, Inherited = false)]
	[Serializable]
	public sealed class DataProtectionPermissionAttribute : CodeAccessSecurityAttribute {

		private DataProtectionPermissionFlags _flags;

		public DataProtectionPermissionAttribute (SecurityAction action)
			: base (action) 
		{
		}


		public DataProtectionPermissionFlags Flags {
			get { return _flags; }
			set {
				if ((value & DataProtectionPermissionFlags.AllFlags) != value) {
					string msg = String.Format (Locale.GetText ("Invalid flags {0}"), value);
					throw new ArgumentException (msg, "DataProtectionPermissionFlags");
				}

				_flags = value;
			}
		}

		public bool ProtectData {
			get { return ((_flags & DataProtectionPermissionFlags.ProtectData) != 0); }
			set {
				if (value) {
					_flags |= DataProtectionPermissionFlags.ProtectData;
				}
				else {
					_flags &= ~DataProtectionPermissionFlags.ProtectData;
				}
			}
		}

		public bool UnprotectData {
			get { return ((_flags & DataProtectionPermissionFlags.UnprotectData) != 0); }
			set {
				if (value) {
					_flags |= DataProtectionPermissionFlags.UnprotectData;
				}
				else {
					_flags &= ~DataProtectionPermissionFlags.UnprotectData;
				}
			}
		}

		public bool ProtectMemory {
			get { return ((_flags & DataProtectionPermissionFlags.ProtectMemory) != 0); }
			set {
				if (value) {
					_flags |= DataProtectionPermissionFlags.ProtectMemory;
				}
				else {
					_flags &= ~DataProtectionPermissionFlags.ProtectMemory;
				}
			}
		}

		public bool UnprotectMemory {
			get { return ((_flags & DataProtectionPermissionFlags.UnprotectMemory) != 0); }
			set {
				if (value) {
					_flags |= DataProtectionPermissionFlags.UnprotectMemory;
				}
				else {
					_flags &= ~DataProtectionPermissionFlags.UnprotectMemory;
				}
			}
		}


		public override IPermission CreatePermission ()
		{
			DataProtectionPermission perm = null;
			if (this.Unrestricted)
				perm = new DataProtectionPermission (PermissionState.Unrestricted);
			else
				perm = new DataProtectionPermission (_flags);
			return perm;
		}
	}
}