mcs/class/referencesource/mscorlib/system/security/permissions/gacidentitypermission.cs

   1 // ==++==
   2 //
   3 //   Copyright (c) Microsoft Corporation.  All rights reserved.
   4 //
   5 // ==--==
   6 // GacIdentityPermission.cs
   7 //
   8 // <OWNER>[....]</OWNER>
   9 //
  10
  11 namespace System.Security.Permissions
  12 {
  13     using System;
  14 #if FEATURE_CAS_POLICY
  15     using SecurityElement = System.Security.SecurityElement;
  16 #endif // FEATURE_CAS_POLICY
  17     using System.Globalization;
  18
  19     [AttributeUsage(AttributeTargets.Method | AttributeTargets.Constructor | AttributeTargets.Class | AttributeTargets.Struct | AttributeTargets.Assembly, AllowMultiple = true, Inherited = false )]
  20     [System.Runtime.InteropServices.ComVisible(true)]
  21     [Serializable]
  22 #pragma warning disable 618
  23     sealed public class GacIdentityPermissionAttribute : CodeAccessSecurityAttribute
  24 #pragma warning restore 618
  25     {
  26 #pragma warning disable 618
  27         public GacIdentityPermissionAttribute( SecurityAction action )
  28 #pragma warning restore 618
  29             : base( action )
  30         {
  31         }
  32
  33         public override IPermission CreatePermission()
  34         {
  35             return new GacIdentityPermission();
  36         }
  37     }
  38
  39
  40     [System.Runtime.InteropServices.ComVisible(true)]
  41     [Serializable]
  42     sealed public class GacIdentityPermission : CodeAccessPermission, IBuiltInPermission
  43     {
  44         //------------------------------------------------------
  45         //
  46         // PUBLIC CONSTRUCTORS
  47         //
  48         //------------------------------------------------------
  49
  50         public GacIdentityPermission(PermissionState state)
  51         {
  52             if (state != PermissionState.Unrestricted && state != PermissionState.None)
  53             {
  54                 throw new ArgumentException(Environment.GetResourceString("Argument_InvalidPermissionState"));
  55             }
  56         }
  57
  58         public GacIdentityPermission()
  59         {
  60         }
  61
  62         //------------------------------------------------------
  63         //
  64         // IPERMISSION IMPLEMENTATION
  65         //
  66         //------------------------------------------------------
  67
  68
  69         public override IPermission Copy()
  70         {
  71             return new GacIdentityPermission();
  72         }
  73
  74         public override bool IsSubsetOf(IPermission target)
  75         {
  76             if (target == null)
  77                 return false;
  78             if (!(target is GacIdentityPermission))
  79                 throw new ArgumentException(Environment.GetResourceString("Argument_WrongType", this.GetType().FullName));
  80             return true;
  81         }
  82
  83         public override IPermission Intersect(IPermission target)
  84         {
  85             if (target == null)
  86                 return null;
  87             if (!(target is GacIdentityPermission))
  88                 throw new ArgumentException(Environment.GetResourceString("Argument_WrongType", this.GetType().FullName));
  89             return this.Copy();
  90         }
  91
  92         public override IPermission Union(IPermission target)
  93         {
  94             if (target == null)
  95                 return this.Copy();
  96             if (!(target is GacIdentityPermission))
  97                 throw new ArgumentException(Environment.GetResourceString("Argument_WrongType", this.GetType().FullName));
  98             return this.Copy();
  99         }
 100
 101 #if FEATURE_CAS_POLICY
 102         public override SecurityElement ToXml()
 103         {
 104             SecurityElement securityElement = CodeAccessPermission.CreatePermissionElement( this, "System.Security.Permissions.GacIdentityPermission" );
 105             return securityElement;
 106         }
 107
 108         public override void FromXml(SecurityElement securityElement)
 109         {
 110             CodeAccessPermission.ValidateElement(securityElement, this);
 111         }
 112 #endif // FEATURE_CAS_POLICY
 113
 114         /// <internalonly/>
 115         int IBuiltInPermission.GetTokenIndex()
 116         {
 117             return GacIdentityPermission.GetTokenIndex();
 118         }
 119
 120         internal static int GetTokenIndex()
 121         {
 122             return BuiltInPermissionIndex.GacIdentityPermissionIndex;
 123         }
 124     }
 125 }