2 // System.Web.AspNetHostingPermission.cs
5 // Andreas Nahr (ClassDevelopment@A-SoftTech.com)
6 // Sebastien Pouliot <sebastien@ximian.com>
8 // Copyright (C) 2004-2005 Novell, Inc (http://www.novell.com)
10 // Permission is hereby granted, free of charge, to any person obtaining
11 // a copy of this software and associated documentation files (the
12 // "Software"), to deal in the Software without restriction, including
13 // without limitation the rights to use, copy, modify, merge, publish,
14 // distribute, sublicense, and/or sell copies of the Software, and to
15 // permit persons to whom the Software is furnished to do so, subject to
16 // the following conditions:
18 // The above copyright notice and this permission notice shall be
19 // included in all copies or substantial portions of the Software.
21 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
22 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
23 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
24 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
25 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
26 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
27 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
30 using System.Security;
31 using System.Security.Permissions;
33 namespace System.Web {
36 public sealed class AspNetHostingPermission : CodeAccessPermission, IUnrestrictedPermission {
38 private const int version = 1;
40 private AspNetHostingPermissionLevel _level;
42 public AspNetHostingPermission (AspNetHostingPermissionLevel level)
44 // use the property to get the enum validation
48 public AspNetHostingPermission (PermissionState state)
50 if (PermissionHelper.CheckPermissionState (state, true) == PermissionState.Unrestricted)
51 _level = AspNetHostingPermissionLevel.Unrestricted;
53 _level = AspNetHostingPermissionLevel.None;
56 public AspNetHostingPermissionLevel Level {
57 get { return _level; }
59 if ((value < AspNetHostingPermissionLevel.None) || (value > AspNetHostingPermissionLevel.Unrestricted)) {
60 string msg = Locale.GetText ("Invalid enum {0}.");
61 throw new ArgumentException (String.Format (msg, value), "Level");
67 public bool IsUnrestricted ()
69 return (_level == AspNetHostingPermissionLevel.Unrestricted);
72 public override IPermission Copy ()
74 // note: no need to handle unrestricted here
75 return new AspNetHostingPermission (_level);
78 public override void FromXml (SecurityElement securityElement)
80 PermissionHelper.CheckSecurityElement (securityElement, "securityElement", version, version);
81 if (securityElement.Tag != "IPermission") {
82 string msg = Locale.GetText ("Invalid tag '{0}' for permission.");
83 throw new ArgumentException (String.Format (msg, securityElement.Tag), "securityElement");
85 if (securityElement.Attribute ("version") == null) {
86 string msg = Locale.GetText ("Missing version attribute.");
87 throw new ArgumentException (msg, "securityElement");
90 if (PermissionHelper.IsUnrestricted (securityElement)) {
91 // in case it's get fixed later...
92 _level = AspNetHostingPermissionLevel.Unrestricted;
95 string level = securityElement.Attribute ("Level");
97 _level = (AspNetHostingPermissionLevel) Enum.Parse (
98 typeof (AspNetHostingPermissionLevel), level);
101 _level = AspNetHostingPermissionLevel.None;
105 public override SecurityElement ToXml ()
107 SecurityElement se = PermissionHelper.Element (typeof (AspNetHostingPermission), version);
108 if (IsUnrestricted ())
109 se.AddAttribute ("Unrestricted", "true"); // FDBK15156 fixed in 2.0 RC
110 se.AddAttribute ("Level", _level.ToString ());
114 public override IPermission Intersect (IPermission target)
116 AspNetHostingPermission anhp = Cast (target);
120 return new AspNetHostingPermission ((_level <= anhp.Level) ? _level : anhp.Level);
123 public override bool IsSubsetOf (IPermission target)
125 AspNetHostingPermission anhp = Cast (target);
128 return (_level <= anhp._level);
131 public override IPermission Union (IPermission target)
133 AspNetHostingPermission anhp = Cast (target);
136 return new AspNetHostingPermission ((_level > anhp.Level) ? _level : anhp.Level);
139 // Internal helpers methods
141 private bool IsEmpty ()
143 return (_level == AspNetHostingPermissionLevel.None);
146 private AspNetHostingPermission Cast (IPermission target)
151 AspNetHostingPermission anhp = (target as AspNetHostingPermission);
153 PermissionHelper.ThrowInvalidPermission (target, typeof (AspNetHostingPermission));