class/corlib/System.Security/HostSecurityManager.cs

   1 //
   2 // System.Security.HostSecurityManager class
   3 //
   4 // Author:
   5 //      Sebastien Pouliot  <sebastien@ximian.com>
   6 //
   7 // Copyright (C) 2004-2005 Novell, Inc (http://www.novell.com)
   8 //
   9 // Permission is hereby granted, free of charge, to any person obtaining
  10 // a copy of this software and associated documentation files (the
  11 // "Software"), to deal in the Software without restriction, including
  12 // without limitation the rights to use, copy, modify, merge, publish,
  13 // distribute, sublicense, and/or sell copies of the Software, and to
  14 // permit persons to whom the Software is furnished to do so, subject to
  15 // the following conditions:
  16 //
  17 // The above copyright notice and this permission notice shall be
  18 // included in all copies or substantial portions of the Software.
  19 //
  20 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  21 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  22 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  23 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  24 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  25 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  26 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  27 //
  28
  29 using System.Reflection;
  30 using System.Runtime.Hosting;
  31 using System.Runtime.InteropServices;
  32 using System.Security.Policy;
  33
  34 namespace System.Security {
  35
  36         [Serializable]
  37         [ComVisible (true)]
  38         public class HostSecurityManager {
  39
  40                 public HostSecurityManager ()
  41                 {
  42                 }
  43
  44                 public virtual PolicyLevel DomainPolicy {
  45                         // always return null - may be overriden
  46                         get { return null; }
  47                 }
  48
  49                 public virtual HostSecurityManagerOptions Flags {
  50                         get { return HostSecurityManagerOptions.AllFlags; }
  51                 }
  52
  53                 public virtual ApplicationTrust DetermineApplicationTrust (Evidence applicationEvidence, Evidence activatorEvidence, TrustManagerContext context)
  54                 {
  55                         if (applicationEvidence == null)
  56                                 throw new ArgumentNullException ("applicationEvidence");
  57
  58                         ActivationArguments aa = null;
  59                         foreach (object o in applicationEvidence) {
  60                                 aa = (o as ActivationArguments);
  61                                 if (aa != null)
  62                                         break;
  63                         }
  64
  65                         if (aa == null) {
  66                                 string msg = Locale.GetText ("No {0} found in {1}.");
  67                                 throw new ArgumentException (string.Format (msg, "ActivationArguments", "Evidence"), "applicationEvidence");
  68                         }
  69                         if (aa.ActivationContext == null) {
  70                                 string msg = Locale.GetText ("No {0} found in {1}.");
  71                                 throw new ArgumentException (string.Format (msg, "ActivationContext", "ActivationArguments"), "applicationEvidence");
  72                         }
  73
  74                         // FIXME: this part is still untested (requires manifest support)
  75                         if (ApplicationSecurityManager.DetermineApplicationTrust (aa.ActivationContext, context)) {
  76                                 if (aa.ApplicationIdentity == null)
  77                                         return new ApplicationTrust ();
  78                                 else
  79                                         return new ApplicationTrust (aa.ApplicationIdentity);
  80                         }
  81                         return null;
  82                 }
  83
  84                 public virtual Evidence ProvideAppDomainEvidence (Evidence inputEvidence)
  85                 {
  86                         // no changes - may be overriden
  87                         return inputEvidence;
  88                 }
  89
  90                 public virtual Evidence ProvideAssemblyEvidence (Assembly loadedAssembly, Evidence inputEvidence)
  91                 {
  92                         // no changes - may be overriden
  93                         return inputEvidence;
  94                 }
  95
  96                 public virtual PermissionSet ResolvePolicy (Evidence evidence)
  97                 {
  98                         if (evidence == null)
  99                                 throw new NullReferenceException ("evidence");
 100                         return SecurityManager.ResolvePolicy (evidence);
 101                 }
 102         }
 103 }