System.Security.Policy/UnionCodeGroup.cs

   1 //
   2 // System.Security.Policy.UnionCodeGroup.cs
   3 //
   4 // Authors
   5 //      Duncan Mak (duncan@ximian.com)
   6 //      Sebastien Pouliot  <sebastien@ximian.com>
   7 //
   8 // (C) 2003 Ximian, Inc (http://www.ximian.com)
   9 // Copyright (C) 2004-2005 Novell, Inc (http://www.novell.com)
  10 //
  11 // Permission is hereby granted, free of charge, to any person obtaining
  12 // a copy of this software and associated documentation files (the
  13 // "Software"), to deal in the Software without restriction, including
  14 // without limitation the rights to use, copy, modify, merge, publish,
  15 // distribute, sublicense, and/or sell copies of the Software, and to
  16 // permit persons to whom the Software is furnished to do so, subject to
  17 // the following conditions:
  18 //
  19 // The above copyright notice and this permission notice shall be
  20 // included in all copies or substantial portions of the Software.
  21 //
  22 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  23 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  24 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  25 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  26 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  27 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  28 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  29 //
  30
  31 using System.Globalization;
  32 using System.Security.Permissions;
  33 using System.Runtime.InteropServices;
  34
  35 namespace System.Security.Policy {
  36
  37         [Serializable]
  38 #if NET_2_0
  39         [ComVisible (true)]
  40 #endif
  41         public sealed class UnionCodeGroup : CodeGroup {
  42
  43                 public UnionCodeGroup (IMembershipCondition membershipCondition, PolicyStatement policyStatement)
  44                         : base (membershipCondition, policyStatement)
  45                 {
  46                 }
  47
  48                 // for PolicyLevel (to avoid validation duplication)
  49                 internal UnionCodeGroup (SecurityElement e, PolicyLevel level)
  50                         : base (e, level)
  51                 {
  52                 }
  53
  54                 public override CodeGroup Copy ()
  55                 {
  56                         return Copy (true);
  57                 }
  58
  59                 internal CodeGroup Copy (bool childs)
  60                 {
  61                         UnionCodeGroup copy = new UnionCodeGroup (MembershipCondition, PolicyStatement);
  62                         copy.Name = Name;
  63                         copy.Description = Description;
  64                         if (childs) {
  65                                 foreach (CodeGroup child in Children) {
  66                                         copy.AddChild (child.Copy ());
  67                                 }
  68                         }
  69                         return copy;
  70                 }
  71
  72
  73                 public override PolicyStatement Resolve (Evidence evidence)
  74                 {
  75                         if (evidence == null)
  76                                 throw new ArgumentNullException ("evidence");
  77
  78                         if (!MembershipCondition.Check (evidence))
  79                                 return null;
  80
  81                         PermissionSet ps = this.PolicyStatement.PermissionSet.Copy ();
  82                         if (this.Children.Count > 0) {
  83                                 foreach (CodeGroup child_cg in this.Children) {
  84                                         PolicyStatement child_pst = child_cg.Resolve (evidence);
  85                                         if (child_pst != null) {
  86                                                 ps = ps.Union (child_pst.PermissionSet);
  87                                         }
  88                                 }
  89                         }
  90
  91                         PolicyStatement pst = this.PolicyStatement.Copy ();
  92                         pst.PermissionSet = ps;
  93                         return pst;
  94                 }
  95
  96                 public override CodeGroup ResolveMatchingCodeGroups (Evidence evidence)
  97                 {
  98                         if (evidence == null)
  99                                 throw new ArgumentNullException ("evidence");
 100
 101                         if (!MembershipCondition.Check (evidence))
 102                                 return null;
 103
 104                         // Copy() would add the child (even if they didn't match)
 105                         CodeGroup match = Copy (false);
 106                         if (this.Children.Count > 0) {
 107                                 foreach (CodeGroup cg in this.Children) {
 108                                         CodeGroup child = cg.ResolveMatchingCodeGroups (evidence);
 109                                         if (child != null)
 110                                                 match.AddChild (child);
 111                                 }
 112                         }
 113                         return match;
 114                 }
 115
 116                 public override string MergeLogic {
 117                         get { return "Union"; }
 118                 }
 119         }
 120 }