2 // System.Configuration.ConfigurationPermission.cs
5 // Chris Toshok <toshok@ximian.com>
8 // Copyright (C) 2004 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.
32 using System.Security;
33 using System.Security.Permissions;
35 namespace System.Configuration {
38 public sealed class ConfigurationPermission : CodeAccessPermission, IUnrestrictedPermission
40 public ConfigurationPermission (PermissionState state)
42 unrestricted = (state == PermissionState.Unrestricted);
45 public override IPermission Copy ()
47 return new ConfigurationPermission (unrestricted ? PermissionState.Unrestricted : PermissionState.None);
50 public override void FromXml (SecurityElement securityElement)
52 if (securityElement == null)
53 throw new ArgumentNullException ("securityElement");
55 // LAMESPEC: it says to throw an ArgumentNullException in this case
56 if (securityElement.Tag != "IPermission")
57 throw new ArgumentException ("securityElement");
59 string unrestricted = securityElement.Attribute ("Unrestricted");
60 if (unrestricted != null) {
61 this.unrestricted = (String.Compare (unrestricted, "true", true) == 0);
65 public override IPermission Intersect (IPermission target)
70 ConfigurationPermission p = target as ConfigurationPermission;
72 throw new ArgumentException ("target");
74 return new ConfigurationPermission (unrestricted && p.IsUnrestricted() ? PermissionState.Unrestricted : PermissionState.None);
77 public override IPermission Union (IPermission target)
82 ConfigurationPermission p = target as ConfigurationPermission;
84 throw new ArgumentException ("target");
86 return new ConfigurationPermission (unrestricted || p.IsUnrestricted() ? PermissionState.Unrestricted : PermissionState.None);
89 public override bool IsSubsetOf (IPermission target)
94 ConfigurationPermission p = target as ConfigurationPermission;
96 throw new ArgumentException ("target");
99 return p.IsUnrestricted();
104 public bool IsUnrestricted ()
109 public override SecurityElement ToXml ()
111 SecurityElement root = new SecurityElement ("IPermission");
112 root.AddAttribute ("class", this.GetType().AssemblyQualifiedName);
113 root.AddAttribute ("version", "1");
115 root.AddAttribute ("Unrestricted", "true");