mcs/class/corlib/System.Security.Policy/PublisherMembershipCondition.cs

   1 //
   2 // PublisherMembershipCondition.cs: Publisher Membership Condition
   3 //
   4 // Author:
   5 //      Sebastien Pouliot  <sebastien@ximian.com>
   6 //
   7 // (C) 2002, 2003 Motus Technologies Inc. (http://www.motus.com)
   8 // Copyright (C) 2004-2005 Novell, Inc (http://www.novell.com)
   9 //
  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:
  17 //
  18 // The above copyright notice and this permission notice shall be
  19 // included in all copies or substantial portions of the Software.
  20 //
  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.
  28 //
  29
  30 using System.Collections;
  31 using System.Security.Cryptography.X509Certificates;
  32 using System.Runtime.InteropServices;
  33
  34 using Mono.Security.Cryptography;
  35
  36 namespace System.Security.Policy {
  37
  38         [Serializable]
  39 #if NET_2_0
  40         [ComVisible (true)]
  41 #endif
  42         public sealed class PublisherMembershipCondition : IConstantMembershipCondition, IMembershipCondition {
  43
  44                 private readonly int version = 1;
  45
  46                 private X509Certificate x509;
  47
  48                 // so System.Activator.CreateInstance can create an instance...
  49                 internal PublisherMembershipCondition ()
  50                 {
  51                 }
  52
  53                 public PublisherMembershipCondition (X509Certificate certificate)
  54                 {
  55                         if (certificate == null)
  56                                 throw new ArgumentNullException ("certificate");
  57                         // needed to match MS implementation
  58                         if (certificate.GetHashCode () == 0) {
  59 #if NET_2_0
  60                                 throw new ArgumentException ("certificate");
  61 #else
  62                                 throw new NullReferenceException ("certificate");
  63 #endif
  64                         }
  65                         x509 = certificate;
  66                 }
  67
  68                 public X509Certificate Certificate {
  69                         get { return x509; }
  70                         set {
  71                                 if (value == null)
  72                                         throw new ArgumentNullException ("value");
  73                                 x509 = value;
  74                         }
  75                 }
  76
  77                 public bool Check (Evidence evidence)
  78                 {
  79                         if (evidence == null)
  80                                 return false;
  81
  82                         IEnumerator e = evidence.GetHostEnumerator ();
  83                         while (e.MoveNext ()) {
  84                                 if (e.Current is Publisher) {
  85                                         if (x509.Equals ((e.Current as Publisher).Certificate))
  86                                                 return true;
  87                                 }
  88                         }
  89                         return false;
  90                 }
  91
  92                 public IMembershipCondition Copy ()
  93                 {
  94                         return new PublisherMembershipCondition (x509);
  95                 }
  96
  97                 public override bool Equals (object o)
  98                 {
  99                         PublisherMembershipCondition pmc = (o as PublisherMembershipCondition);
 100                         if (pmc == null)
 101                                 return false;
 102                         return x509.Equals (pmc.Certificate);
 103                 }
 104
 105                 public void FromXml (SecurityElement e)
 106                 {
 107                         FromXml (e, null);
 108                 }
 109
 110                 public void FromXml (SecurityElement e, PolicyLevel level)
 111                 {
 112                         MembershipConditionHelper.CheckSecurityElement (e, "e", version, version);
 113                         string cert = e.Attribute ("X509Certificate");
 114                         if (cert != null) {
 115                                 byte[] rawcert = CryptoConvert.FromHex (cert);
 116                                 x509 = new X509Certificate (rawcert);
 117                         }
 118                         // PolicyLevel isn't used as there's no need to resolve NamedPermissionSet references
 119                 }
 120
 121                 public override int GetHashCode ()
 122                 {
 123                         return x509.GetHashCode ();
 124                 }
 125
 126                 public override string ToString ()
 127                 {
 128                         return "Publisher - " + x509.GetPublicKeyString ();
 129                 }
 130
 131                 public SecurityElement ToXml ()
 132                 {
 133                         return ToXml (null);
 134                 }
 135
 136                 public SecurityElement ToXml (PolicyLevel level)
 137                 {
 138                         // PolicyLevel isn't used as there's no need to resolve NamedPermissionSet references
 139                         SecurityElement se = MembershipConditionHelper.Element (typeof (PublisherMembershipCondition), version);
 140                         se.AddAttribute ("X509Certificate", x509.GetRawCertDataString ());
 141                         return se;
 142                 }
 143         }
 144 }